diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml index e9ba613eef..c8465357de 100644 --- a/.github/workflows/ci.yml +++ b/.github/workflows/ci.yml @@ -13,7 +13,7 @@ jobs: libasound2-dev libgl-dev libglew-dev - libgtk2.0-dev + libgtk-3-dev libjack-dev libmad0-dev libpulse-dev @@ -40,10 +40,11 @@ jobs: libasound2-dev libgl-dev libglew-dev - libgtk2.0-dev + libgtk-3-dev libjack-dev libjsoncpp-dev libmad0-dev + libpng-dev libpulse-dev libtomcrypt-dev libtommath-dev @@ -55,7 +56,6 @@ jobs: libxtst-dev ninja-build - name: Configure - # TODO: png: https://github.com/stepmania/stepmania/issues/1881 run: cmake -G Ninja -B build -DWITH_SYSTEM_FFMPEG=ON -DWITH_SYSTEM_GLEW=ON @@ -64,7 +64,7 @@ jobs: -DWITH_SYSTEM_MAD=ON -DWITH_SYSTEM_OGG=ON -DWITH_SYSTEM_PCRE=ON - -DWITH_SYSTEM_PNG=OFF + -DWITH_SYSTEM_PNG=ON -DWITH_SYSTEM_TOMCRYPT=ON -DWITH_SYSTEM_TOMMATH=ON -DWITH_SYSTEM_ZLIB=ON diff --git a/.gitmodules b/.gitmodules new file mode 100644 index 0000000000..e69de29bb2 diff --git a/CMake/DefineOptions.cmake b/CMake/DefineOptions.cmake index 1c438cce89..75de70aa2d 100644 --- a/CMake/DefineOptions.cmake +++ b/CMake/DefineOptions.cmake @@ -96,7 +96,7 @@ elseif(LINUX) option(WITH_TTY "Build with Linux TTY Input Support." OFF) option(WITH_PROFILING "Build with Profiling Support." OFF) option(WITH_GLES2 "Build with OpenGL ES 2.0 Support." ON) - option(WITH_GTK2 "Build with GTK2 Support." ON) + option(WITH_GTK3 "Build with GTK3 Support." ON) option(WITH_PARALLEL_PORT "Build with Parallel Lights I/O Support." OFF) option(WITH_CRASH_HANDLER "Build with Crash Handler Support." ON) option(WITH_XINERAMA diff --git a/CMake/Modules/FindGTK3.cmake b/CMake/Modules/FindGTK3.cmake new file mode 100644 index 0000000000..e3330d8724 --- /dev/null +++ b/CMake/Modules/FindGTK3.cmake @@ -0,0 +1,9 @@ +# Use pkg-config to find installed gtk+3 if available +# +# Once found, the following are defined: +# GTK3_FOUND +# GTK3_INCLUDE_DIRS +# GTK3_LIBRARIES + +include(FindPkgConfig) +pkg_check_modules(GTK3 gtk+-3.0) diff --git a/Docs/Luadoc/Lua.xml b/Docs/Luadoc/Lua.xml index bec2e01f46..3e3415f4ef 100644 --- a/Docs/Luadoc/Lua.xml +++ b/Docs/Luadoc/Lua.xml @@ -9,6 +9,8 @@ + + @@ -24,6 +26,11 @@ + + + + + @@ -42,11 +49,13 @@ - + + + @@ -55,6 +64,7 @@ + @@ -63,6 +73,7 @@ + @@ -87,6 +98,7 @@ + @@ -118,12 +130,14 @@ + + @@ -137,7 +151,6 @@ - @@ -146,7 +159,10 @@ + + + @@ -158,18 +174,13 @@ - - - - - - + @@ -190,9 +201,9 @@ + - @@ -203,25 +214,33 @@ + + + + + + + + + + - - @@ -230,23 +249,29 @@ + + + + + + @@ -254,12 +279,18 @@ + + + + + + @@ -752,6 +783,8 @@ + + @@ -1013,6 +1046,8 @@ + + @@ -1503,6 +1538,8 @@ + + @@ -1839,6 +1876,8 @@ + + @@ -2330,6 +2369,18 @@ + + + + + + + + + + + + @@ -2930,6 +2981,6 @@ - StepMania5.1-git-d03ec2658f - 2020-05-11 + StepMania5.1-git-89229ed915 + 2020-06-25 diff --git a/Docs/Luadoc/Lua.xsd b/Docs/Luadoc/Lua.xsd index 3edd27c34f..7b5954af5b 100644 --- a/Docs/Luadoc/Lua.xsd +++ b/Docs/Luadoc/Lua.xsd @@ -89,6 +89,7 @@ + diff --git a/Docs/Luadoc/Lua.xsl b/Docs/Luadoc/Lua.xsl index 64986a12d7..b655c3a95e 100644 --- a/Docs/Luadoc/Lua.xsl +++ b/Docs/Luadoc/Lua.xsl @@ -106,7 +106,7 @@ font-family: monospace; } .descriptionText { - text-indent: 2em; + padding-left: 2em; margin-top: 0; margin-bottom: 0; } @@ -169,7 +169,7 @@ var listid = 'list_' + id; var img = document.getElementById( imgid ); var list = document.getElementById( listid ); - + img.setAttribute( 'src', 'open.gif' ); list.style.display = 'block'; } @@ -184,7 +184,7 @@ var listid = 'list_' + id; var img = document.getElementById( imgid ); var list = document.getElementById( listid ); - + if( img.getAttribute('src') == 'closed.gif' ) { img.setAttribute( 'src', 'open.gif' ); @@ -200,7 +200,7 @@ - + \ @@ -648,7 +648,7 @@ - + @@ -670,6 +670,14 @@ + + + 
+		
+			
+		
+
+
diff --git a/Docs/Luadoc/LuaDocumentation.xml b/Docs/Luadoc/LuaDocumentation.xml index 765ecc3aaa..46e085c629 100644 --- a/Docs/Luadoc/LuaDocumentation.xml +++ b/Docs/Luadoc/LuaDocumentation.xml @@ -28,30 +28,54 @@ save yourself some time, copy this for undocumented things: + + Many global functions are available when scripting with Lua for StepMania.
+ Some, like , are core functions of Lua 5.1's basic Library.
+ Others, like , are defined in the StepMania engine's C++ but made available to Lua.
+ And others, like , are defined in the _fallback theme's Lua files.
+ When scripting with StepMania, keep in mind that if you do not scope your functions (and variables) using the local keyword, they will be global. + + + [03 Gameplay.lua] Returns false if the player should be disallowed from entering the options menu from ScreenSelectMusic (i.e. during an ExtraStage or when the is Oni). Returns true otherwise. + - [02 Colors.lua] Returns a color with the specified alpha. + [02 Colors.lua] Returns a color with HSV values matching c and alpha set to percent, where percent is in the range 0..1. Use this to make a current value approach a goal value at the given speed. Speed must not be negative. The value will not overshoot the goal.
Note: When you see the error "approach: speed 1 is negative." it means that the speed value passed was negative. The 1 is there because approach and multiapproach use the same internal function and can be ignored when using approach. - [03 CustomSpeedMods.lua] + [03 CustomSpeedMods.lua] Returns an of speed mod choices generated from the comma-delimited list in SpeedMods.txt in the root of the current Profile directory (player if available, machine otherwise). - [02 StageMods.lua] + [02 StageMods.lua] Returns true if player modifiers should be forced. This is effectively the negation of . - [02 StageMods.lua] + [02 StageMods.lua] Returns true if song modifiers should be forced (i.e. during an ExtraStage, or when the is Oni, Battle, or Rave). - Issues an error when v is false (or nil). Returns all arguments otherwise. sAssertMessage is an optional error message (the default is "assertion failed!"). + Issues an error when v is false (or nil). Returns all arguments otherwise. sAssertMessage is an optional error message (the default is "assertion failed!").
+ assert is a core function of Lua's basic library; see the Lua manual for more details. + + + [02 Utilities.lua] Returns two results.
+ If P1 is joined, the first return value will be arg1, and nil otherwise.
+ If P2 is joined, the second return value will be arg2, and nil otherwise. + + + [04 SetBGFitHelpers.lua] Returns an ActorFrame containing examples of how a given background image (with set aspect ratio) will appear in a particular .
+ The _fallback theme uses this to visually represent choices for ScreenSetBGFit, intended to help players choose a BackgroundFitMode preference. + + + [04 SetBGFitHelpers.lua] Returns an ActorFrame with an InputCallback attached.
+ The _fallback theme uses this to manage input on ScreenSetBGFit, intended to help players choose a preference. - Returns the base name of file path. + Returns the last named component of path. For example, passing in "/path/to/file.txt" will return "file.txt", while "/path/to/some/directory/" will return "directory". - [02 Colors.lua] Boosts the specified color by multiplying its values by fBoost. + [02 Colors.lua] Returns the color that results from multiplying c's R, G, and B values by fBoost. [02 Colors.lua] Modifies the brightness of the specified color. @@ -71,7 +95,8 @@ save yourself some time, copy this for undocumented things: Closes any connection to an online server. - A generic interface to Lua's garbage collector. Performs different functions based on the value of opt. + A generic interface to Lua's garbage collector. Performs different functions based on the value of opt.
+ collectgarbage is a core function of Lua's basic library; see the Lua manual for more details. Returns a color from a string. color can be in hex ("#FFFFFFFF") or 0..1 values ("1.0,1.0,1.0,1.0"), in RGBA order. @@ -86,10 +111,10 @@ save yourself some time, copy this for undocumented things: [02 Colors.lua] Returns a midtone of the color. (Specifically c[1]/1.5, c[2]/1.5, c[3]/1.5, c[4]) - [02 Colors.lua] Returns a hex representation for the specified color. + [02 Colors.lua] Accepts a color and returns the hex representation. For example, passing in {1, 0, 0.4, 1} will return "FF0066FF". - [02 Colors.lua] Takes in a color and returns a table with the HSV values. + [02 Colors.lua] Accepts a color and returns a table with the HSV values, indexed by Hue, Sat, Value, and Alpha. [03 Gameplay.lua] Determines what TapNoteScore allows for continuing the combo. @@ -101,10 +126,8 @@ save yourself some time, copy this for undocumented things: [03 Gameplay.lua] Determines if combo should be per row (Jump = 1) or per column (Jump = 2). - [02 Other.lua] The combo trasform command. - - - [03 Gameplay.lua] Returns the UserPrefComboUnderField user preference value. + [02 Other.lua] Defines the transform function used to position player combo during gameplay. params will contain two boolean values indexed by bReverse and bCentered.
+ Not intended to be called directly by themes. This will take the number and insert a comma every three digits, as normal in English for writing large numbers.
@@ -118,10 +141,18 @@ save yourself some time, copy this for undocumented things: Tries to connect to the server at sAddress. + + Returns d localized for the current language using strings defined under [CourseDifficulty]. + + + Returns ct localized for the current language using strings defined under [CourseType]. + + + [02 Utilities.lua] Utillity function used to format log output for presenting on-screen. indent is the number of pixels to indent lines. width is the width in pixels that lines should be constrained to. + - Recursively searches dir for xml files of actors and - converts them to equivalent lua files. See Docs/Themerdocs/XmlToLua.txt - for details. + Recursively searches dir for xml files of actors and converts them to equivalent lua files. + See Docs/Themerdocs/XmlToLua.txt. Creates a RageBezier2D for you to use. Make sure you destroy the RageBezier2D when you're done with it, or you will have a memory leak. @@ -138,17 +169,21 @@ save yourself some time, copy this for undocumented things: [02 Colors.lua] + + Returns cd localized for the current language using strings defined under [CustomDifficulty]. + - Returns the current day of the month. + Returns the current day of the month in the range 1-31. - Returns the current day of the year. + Returns the current day of the year in the range 0-365. [02 Serialize] Recursively deep-copy a table. - [01 base.lua] "Override Lua's dofile to use our loadfile." + dofile is normally a core function of Lua's basic library. StepMania overrides this in + [01 base.lua] to use loadfile, which itself has been overridden. [03 Gameplay.lua] @@ -162,8 +197,8 @@ save yourself some time, copy this for undocumented things: This function creates files in the theme's Languages folder listing all the strings that have no translation and all the strings that are unused.
Strings that do not have an entry in the master language are considered unused.
- master_lang_name is the name of the ini file that contains the language with all strings used by the theme.
- Example: find_missing_strings_in_theme_translations("my_best_theme", "en.ini") + master_lang_name is the name of the ini file that contains the language with all strings used by the theme.
+ Example: find_missing_strings_in_theme_translations( "my_best_theme", "en.ini" ) [02 Utilities.lua] Return the index of a true value in list. @@ -172,12 +207,16 @@ save yourself some time, copy this for undocumented things: [02 Utilities.lua] Find a key in tab with the given value. - func takes a key and a value. + f takes a key and a value. + + Returns the number passed to the function followed by its suffix ("th", "nd", and so on). - + + [02 Other.lua] Concatenates num with " songs played" and returns the resulting string. + Returns fPercentDancePoints formatted as a percentage. @@ -187,6 +226,10 @@ save yourself some time, copy this for undocumented things: [03 Gameplay.lua] + + [02 Other.lua] Returns the value of the CoursesToShowRanking preference if it is not an empty string.
+ Otherwise, returns a comma-delimited set of paths to the .crs files included with StepMania as a string. This string is hardcoded and does not accurately reflect whether those crs files exist in the filesystem. + Returns the corresponding CustomDifficulty string for a StepsType/Difficulty (/optional CourseType) combination. @@ -206,23 +249,20 @@ save yourself some time, copy this for undocumented things: Returns a corresponding for the given percentage. - Returns the current Life Difficulty. + Returns the current Life difficulty in the range of 1-7 - Returns the length of the music file found at path.
- If you are loading the sound into an ActorSound, ActorSound:get to get its RageSound then use RageSound's get_length function instead to avoid loading the file twice. + Returns the length of the music file found at path in seconds.
+ If the file has already been loaded into an ActorSound, use to get its RageSound, and then use to avoid loading the file twice. - Returns a table of the names of the sound drivers available. If the SoundDriver preference is set to something that is not in this list, StepMania WILL NOT START UP. Changes to the SoundDriver preference do not take effect until the next time StepMania starts up. - - - Returns a string representing the name of the operating system being used. (e.g. "Windows", "Linux", "Mac, "Unknown") + Returns a table of the names of the sound drivers available. If the SoundDriver preference is set to something that is not in this list, StepMania will not start up. Changes to the SoundDriver preference do not take effect until the next time StepMania starts up. [02 Utilities.lua] "This returns a profile, preferably a player one. If there isn't one, [it falls] back on the machine profile." - [03 ThemePrefs.lua] Returns true if player pn is using ProTiming. + [03 ThemePrefs.lua] Returns true if player pn is using the ProTiming UserPref. [02 Utilities.lua] Returns a path to a random song background. @@ -234,7 +274,7 @@ save yourself some time, copy this for undocumented things: [02 Actor.lua] - Returns the display aspect ratio. + Returns the screen display aspect ratio (i.e. the DisplayAspectRatio preference). Returns the name of the currently connected server. @@ -242,17 +282,21 @@ save yourself some time, copy this for undocumented things: [02 Utilities.lua] Returns a path to the current songs background. - + [03 Gameplay.lua] + + [03 CustomSpeedMods.lua] + - Returns the theme's aspect ratio. + Returns the theme's aspect ratio.
+ Specifically, this is the result of dividing ScreenWidth by ScreenHeight as each is defined under the theme's [Common] metric. - [03 ThemePrefs.lua] (Alias for .) + [03 ThemePrefs.lua] Alias for . - Returns the current Timing difficulty. + Returns the current Timing difficulty in the range of 1-9. Returns the current time since the program was started. Includes time that was spent loading songs. @@ -288,24 +332,28 @@ save yourself some time, copy this for undocumented things: [03 Gameplay.lua] Returns true if you need to step on hold heads to activate them. - [03 Gameplay.lua] Returns 0 in pump mode, TimingWindowSecondsHold preference value in any other game mode. + [03 Gameplay.lua] Returns 0 when the current is pump. Returns the TimingWindowSecondsHold preference value in other games. Returns the current hour. - - [02 Colors.lua] Converts a color from HSV values to something StepMania can understand. - hue is from 0-360, saturation and value are 0..1 + + [02 Colors.lua] Converts a color from HSV values to something StepMania can understand.
+ hue is from 0-360
+ saturation and value are 0..1 - - [02 Colors.lua] Converts a color from HSV values with alpha to something StepMania can understand. - hue is from 0-360, saturation, value, and alpha are 0..1 + + [02 Colors.lua] Converts a color from HSV values with alpha to something StepMania can understand.
+ hue is from 0-360
+ saturation, value, and alpha are 0..1 - [02 Colors.lua] "Converts a set of HSV values to a color." + [02 Colors.lua] Converts a table of HSV values to a color.
+ The hsv table should use indexes Hue, Sat, Value, Alpha. - [02 Colors.lua] "Takes in a normal color and returns the hex representation. (Adapted from code in LuaBit)" + [02 Colors.lua] Accepts a table of HSV values and returns the hex representation. + The hsv table should use indexes Hue, Sat, Value, Alpha. [02 Colors.lua] Changes the hue of the input color. @@ -313,17 +361,21 @@ save yourself some time, copy this for undocumented things: [03 ThemePrefs.lua] Initializes various user preferences. - - [01 base.lua] "Like ipairs(), but returns only values." + + Returns three values: an iterator function, the table t, and 0, + so that the construction for i,v in ipairs(t) do body end + will iterate over the pairs (1,t[1]), (2,t[2]), ···, up to the first integer key absent from the table.
+ ipairs is a core function of Lua's basic library; see the Lua manual for more details. [02 Utilities.lua] Returns true if the coin mode is not set to CoinMode_Home. - - Returns true if Event Mode is turned on. + + Returns true if the current is Nonstop, Oni, or Endless.
+ This is effectively the same as . - [02 Utilities.lua] Returns true if Arcade and the coin mode is CoinMode_Free. + [02 Utilities.lua] Returns true if IsArcade() and the coin mode is CoinMode_Free. [03 Gameplay.lua] Returns true if the current game is sGame. @@ -358,6 +410,9 @@ save yourself some time, copy this for undocumented things: [02 Colors.lua] + + Returns jl localized for the current language using strings defined under [JudgmentLine]. + [02 Colors.lua] @@ -365,7 +420,7 @@ save yourself some time, copy this for undocumented things: Returns a number linearly interpolated between start and end by percent. - Same as lerp, but for colors. All channels will reach the end of the interpolation at the same time. + Same as , but for colors. All channels will reach the end of the interpolation at the same time. Returns an Actor definition for the actor at sPath. If sPath points to a Lua file, any additional arguments will be passed to that script. @@ -377,7 +432,8 @@ save yourself some time, copy this for undocumented things: [02 ActorDef.lua] Loads an actor with params. - [01 base.lua] "Override Lua's loadfile to use lua.ReadFile." + loadfile is normally a core function of Lua's basic library. StepMania overrides this in + [01 base.lua] to use lua.ReadFile. [02 ActorDef.lua] Load the fallback BGA for the element that is currently being loaded. @@ -388,6 +444,9 @@ save yourself some time, copy this for undocumented things: [02 Sprite.lua] Returns a Sprite with the current song's background. + + Iterates over all functions exposed to Lua in class, creating CamelCase aliases for each function. Not intended to be used by themers. + Returns the length of the multi-byte character string sString. @@ -398,16 +457,17 @@ save yourself some time, copy this for undocumented things: [03 Gameplay.lua] Returns the value to start showing the miss combo at. - Creates a module. See the Lua manual for more details. + Creates a module.
+ module is a core function of Lua's basic library; see the Lua manual for more details. - Returns the current month of the year (0-11). + Returns the current month of the year in the range 0-11. - Returns Month m as a localized string. + Returns m localized for the current language using strings defined under [Month]. - Returns Month m as a string. + Returns m as a non-localized string. Similar to approach, but operates on tables of values instead of single values. This will modify the contents of currents in place, as well as returning currents.
@@ -416,10 +476,10 @@ save yourself some time, copy this for undocumented things: Note: When you see the error "approach: speed 1 is negative." it means that a speed value passed was negative. The 1 tells you which entry in the table was invalid. - "Allows a program to traverse all fields of a table. Its first argument is a + Allows a program to traverse all fields of a table. Its first argument is a table and its second argument is an index in this table. - next returns the next index of the table and its associated value." - See the Lua manual for more details. + next returns the next index of the table and its associated value.
+ next is a core function of Lua's basic library; see the Lua manual for more details. Converts a string such as 'oni' or 'expert' or 'trick' to the appropriate difficulty. @@ -427,10 +487,12 @@ save yourself some time, copy this for undocumented things: [03 ThemePrefs.lua] Returns a Lua option row for ProTiming. + - "Returns three values: the function, the table t, and nil, + Returns three values: the function, the table t, and nil, so that the construction for k,v in pairs(t) do body end - will iterate over all key–value pairs of table t." + will iterate over all key–value pairs of table t.
+ pairs is a core function of Lua's basic library; see the Lua manual for more details. [02 Colors.lua] @@ -438,6 +500,15 @@ save yourself some time, copy this for undocumented things: [02 Colors.lua] + + Returns pma localized for the current language using strings defined under [PeakComboAward]. + + + Returns pm localized for the current language using strings defined under [PlayMode]. + + + Returns pn localized for the current language using strings defined under [PlayerNumber]. + [02 Utilities.lua] Converts a PlayerNumber into a short string (e.g. "P1", "P2"). @@ -448,10 +519,10 @@ save yourself some time, copy this for undocumented things: Returns a formatted percent with the specified numerator and denominator. - [00 init.lua] + [00 init.lua] Alias for . - [03 ThemePrefs.lua] Prints a table's contents to the log. + [03 ThemePrefs.lua] Prints a table's contents to log.txt using . Returns the product family. (e.g. "StepMania") @@ -460,17 +531,23 @@ save yourself some time, copy this for undocumented things: Returns the product ID. (e.g. "StepMania 5") - Returns the product version. + Returns the product version. (e.g. "5.0.11" or "5.1.0" or "5.2-git-96f9771") + + + Returns cat localized for the current language using strings defined under [RadarCategory]. - "Checks whether v1 is equal to v2, without invoking any metamethod." + Checks whether v1 is equal to v2, without invoking any metamethod.
+ rawequal is a core function of Lua's basic library; see the Lua manual for more details. - "Gets the real value of t[index], without invoking any metamethod." + Gets the real value of t[index], without invoking any metamethod.
+ rawget is a core function of Lua's basic library; see the Lua manual for more details. - "Sets the real value of t[index] to value, without invoking any metamethod." - The modified t is then returned. + Sets the real value of t[index] to value, without invoking any metamethod. + The modified t is then returned.
+ rawset is a core function of Lua's basic library; see the Lua manual for more details. [02 ActorDef.lua] Used internally by LoadActor to resolve a path. If optional is true, then a nil path is returned instead of emitting an error if no file is found. @@ -482,18 +559,19 @@ save yourself some time, copy this for undocumented things: [03 UserPreferences2.lua] (internal) Reads the specified user preference from its config file. - Recursively prints all the children of the actor frame to the log file. This can be useful for finding out what actors are on a screen or just seeing what the structure of the actor tree looks like.
+ [02 Utilities.lua] Recursively prints all the children of the actor frame to the log file. This can be useful for finding out what actors are on a screen or just seeing what the structure of the actor tree looks like.
indent is an optional argument that will be prepended to every line. - Recursively prints all values in the table to the log file in the form "(key_type) key: (value_type) value" so that you know the type of the key and the value. Useful if you're not sure exactly what is in a table passed as a parameter.
+ [02 Utilities.lua] Recursively prints all values in the table to the log file in the form "(key_type) key: (value_type) value" so that you know the type of the key and the value. Useful if you're not sure exactly what is in a table passed as a parameter.
indent is an optional argument that will be prepended to every line. Sends the current style to the server. - Loads the specified module. See the Lua manual for more information. + Loads the specified module.
+ require is a core function of Lua's basic library; see the Lua manual for more details. [02 Utilities.lua] Round a number. @@ -508,20 +586,27 @@ save yourself some time, copy this for undocumented things: [02 Colors.lua] Modifies the saturation of the specified color - Saves a screenshot. If pn is nil, saves to the machine's Screenshots dir, otherwise saves to the profile's Screenshots dir. Saves as jpg if compress is true, or png if compress is false. The screenshot is signed if sign is true. prefix and suffix are optional strings to add to the beginning and end of the filename.
+ Saves a screenshot. If pn is nil, saves to the machine's Screenshots dir, otherwise saves to the profile's Screenshots dir. Saves as jpg if compress is true, or png if compress is false. The screenshot is signed if sign is true. prefix and suffix are optional strings to add to the beginning and end of the filename.
Returns success and full path of the resulting screenshot. Scales x, originally within low1 and high1, to fall between low2 and high2. + + [03 Gameplay.lua] Returns the primary ScoreKeeper class to use. + + [02 Colors.lua] + - [00 alias.lua, 02 Other.lua] alias for . + [02 Other.lua] alias for . + + - [00 alias.lua, 02 Other.lua] alias for . + [02 Other.lua] alias for . Returns the current second. @@ -570,15 +655,24 @@ save yourself some time, copy this for undocumented things: [02 ActorDef.lua] Returns true if a decoration should be shown on the current screen or not. + + Returns so localized for the current language using strings defined under [SortOrder]. + [03 CustomSpeedMods.lua] Returns a Lua option row with the custom speed mods defined in SpeedMods.txt. [02 Utilities.lua] Splits a string at every occurence of delimiter, returning a table of the results. + + Returns sa localized for the current language using strings defined under [StageAward]. + [02 Colors.lua] + + Returns i localized for the current language using strings defined under [Stage]. + [02 Colors.lua] @@ -600,58 +694,82 @@ save yourself some time, copy this for undocumented things: [02 Utilities.lua] Look up each value in a table, returning a table with the resulting strings. + + Returns tns localized for the current language using strings defined under [TapNoteScore]. + - [02 TextBanner.lua] This function defines how the TextBanner is laid out. + [02 TextBanner.lua] Defines how the is laid out. + + + [04 Other.lua] [02 Utilities.lua] Converts a string or number to a bool. - Tries to convert e to a number. Returns nil if - it can't convert the input to a number. (base is optional.) + Tries to convert e to a number. Returns nil if it can't convert the input to a number. (base is optional.)
+ tonumber is a core function of Lua's basic library; see the Lua manual for more details. - Converts e to a string. + Converts e to a string.
+ tostring is a core function of Lua's basic library; see the Lua manual for more details. - [02 Enum.lua] Returns a string representing an enum starting from '_'. For example, passing PlayerNumber_P1 to this function will return P1. + [02 Enum.lua] Returns a string representing an enum starting from '_'. For example, passing PlayerNumber_P1 to this function will return "P1". [00 init.lua] Alias for . - Returns the type of the object as a string. See the Lua manual for valid return values. + Returns the type of the object as a string. There are eight basic types in Lua: + nil, boolean, number, string, function, userdata, thread, and table.
+ See the Lua manual for more details. + + + Returns i localized for the current language using strings defined under [UnlockRewardType]. - "Returns the elements from the given table. - This function is equivalent to return list[i], list[i+1], ···, list[j]" - (i and j are optional; "by default, i is 1 and j is the length of the list.") + Returns the elements from table list. This function is equivalent to return list[i], list[i+1], ···, list[j].
+ i and j are optional; by default, i is 1 and j is the length of the list.
+ unpack is a core function of Lua's basic library; see the Lua manual for more details. Returns a string with characters escaped for URLs. (e.g. a space becomes '%20') - This tells Stepmania to update the screen position for any changes to these preferences: CenterImageAddWidth, CenterImageAddHeight, CenterImageTranslateX, CenterImageTranslateY.
+ This tells StepMania to update the screen position for any changes to these preferences: CenterImageAddWidth, CenterImageAddHeight, CenterImageTranslateX, CenterImageTranslateY.
This way, a theme can implement a custom interactive screen for adjusting those preferences. [01 base.lua] Alias for lua.GetThreadVariable. - Returns the current version's build date. + Returns the current version's build date, formatted as YYYYMMDD. - Returns the current version's build time. + Returns the current version's build time, formatted as HH:MM:SS. [00 init.lua] Alias for . + + Returns the current weekday in the range of 0-6, where Sunday is 0. + [04 WidescreenHelpers.lua] Depending on the screen width, scales between ar43 (4:3; 640px) and ar169 (16:9; 854px). [02 Utilities.lua] + + [02 Utilities.lua] + + + [02 Utilities.lua] + + + [02 Utilities.lua] + [02 ActorDef.lua] Wraps the children in an ActorFrame. @@ -667,29 +785,18 @@ save yourself some time, copy this for undocumented things: Returns the current year. - - - [03 ThemePrefs.lua] Returns a Lua option row for toggling AutoSetStyle. - - - [03 ThemePrefs.lua] Returns a Lua option row for displaying the score on ScreenGameplay. - - - [03 ThemePrefs.lua] Returns a Lua option row for displaying the StepsDisplay on ScreenGameplay. - - - [03 ThemePrefs.lua] Returns a Lua option row for determining the fail length. - - - [03 ThemePrefs.lua] Returns a Lua option row for determining the receptor arrow position. - - - [03 ThemePrefs.lua] Returns a Lua option row determining how deep the player options menu should go. - + + The StepMania engine makes some of its namespaces available to Lua. These can be thought of as collections of utility functions.
+ Example using SongUtil to get playable from a song given the current : +

+local song = GAMESTATE:GetCurrentSong()
+local playable_steps = SongUtil.GetPlayableSteps(song)
+
+ Returns the for the file at sPath. @@ -765,20 +872,17 @@ save yourself some time, copy this for undocumented things: Enumerated types are lookup tables associating a string to each numerical value for each Enum. For example, - [1] would be the + PlayerNumber[1] would be the string 'PlayerNumber_P1'.
- The functions defined in the Enum namespace are valid member + The functions in this Enum namespace are valid member functions of every Enum where the first argument is - omitted and the name of the Enum is used in place - of Enum. Instead of - Enum.GetName( - ) or - Enum.Reverse( - ), one can use - :GetName() or - :Reverse(), respectively. + omitted and the name of the Enum is used in place + of Enum.
+ For example:
+ Enum.GetName(PlayerNumber) and + Enum.Reverse(PlayerNumber) can be used like
+ PlayerNumber:GetName() and + PlayerNumber:Reverse(), respectively. Both x and y need to be elements of the enumerated @@ -794,10 +898,12 @@ save yourself some time, copy this for undocumented things: will return the string 'PlayerNumber'. - Returns a reverse lookup table for the enumerated type e. For - example:
local r = - Enum.Reverse( );
- local n = r['PlayerNumber_P2'];
+ Returns a reverse lookup table for the enumerated type e. For + example: +

+local r = PlayerNumber:Reverse()
+local n = r['PlayerNumber_P2']
+
The value of n in this case would be 1 corresponding to the 0-based indexing using in C++ and not 2 as might be expected for the 1-based indexing used in Lua. @@ -874,7 +980,12 @@ save yourself some time, copy this for undocumented things: - + + + Actor is the base class containing common methods that all specialized actor classes inherit. + For example, GetX is a method belonging to Actor, + but s, s, s, and so on can use GetX(). + This adds a wrapper state around the Actor, which is like wrapping the Actor in an ActorFrame, except that you can use it on any actor, and add or remove wrapper states in response to things that happen while the screen is being used. (wrapping an Actor in an ActorFrame normally requires setting it up before the screen starts)
The ActorFrame that is returned is the wrapper state, for convenience.
@@ -935,19 +1046,20 @@ save yourself some time, copy this for undocumented things: Sets Texture Filtering for an Actor to b. - Plays the commands that follow at an accelerated rate (fRate * fRate), where fRate is in seconds. + Plays the commands that follow at an accelerated rate (fRate²), where fRate is in seconds.
+ accelerate is a basic tween command, along with , , , and . Adds a command to the Actor. - Adds rot to the Actor's current x rotation. + Adds rot degrees to the Actor's current X rotation. - Adds rot to the Actor's current y rotation. + Adds rot degrees to the Actor's current Y rotation. - Adds rot to the Actor's current z rotation. + Adds rot degrees to the Actor's current Z rotation. Adds xPos to the Actor's current x position. @@ -974,13 +1086,13 @@ save yourself some time, copy this for undocumented things: Sets the Actor's base alpha to fAlpha, where fAlpha is in the range 0..1. - Sets the Actor's base X rotation to rot. + Sets the Actor's base X rotation to rot degrees. - Sets the Actor's base Y rotation to rot. + Sets the Actor's base Y rotation to rot degrees. - Sets the Actor's base Z rotation to rot. + Sets the Actor's base Z rotation to rot degrees. Sets the Actor's base zoom to zoom. @@ -1010,13 +1122,16 @@ save yourself some time, copy this for undocumented things: [02 Actor.lua] - [02 Actor.lua] Centers an Actor on the screen. (equivalent to x,SCREEN_CENTER_X;y,SCREEN_CENTER_Y) + [02 Actor.lua] Centers an Actor on the screen.
+ self:Center() is equivalent to self:x(SCREEN_CENTER_X):y(SCREEN_CENTER_Y) - [02 Actor.lua] Centers an Actor on the X axis. (equivalent to x,SCREEN_CENTER_X) + [02 Actor.lua] Centers an Actor on the X axis.
+ self:CenterX() is equivalent to self:x(SCREEN_CENTER_X) - [02 Actor.lua] Centers an Actor on the y axis. (equivalent to y,SCREEN_CENTER_Y) + [02 Actor.lua] Centers an Actor on the y axis.
+ self:CenterY() is equivalent to self:y(SCREEN_CENTER_Y) Determines if the z-buffer should be cleared or not. @@ -1039,10 +1154,11 @@ save yourself some time, copy this for undocumented things: Crops percent of the Actor from the top, where percent is in the range 0..1. - Sets the Actor's cull mode to mode. + Sets the Actor's to mode. - Plays the commands that follow at an decelerated rate (1 - (1-fRate) * (1-fRate)), where fRate is in seconds. + Plays the commands that follow at an decelerated rate (1 - (1-fRate) * (1-fRate)), where fRate is in seconds.
+ decelerate is a basic tween command, along with , , , and . Set the Actor's diffuse color to c. @@ -1051,7 +1167,9 @@ save yourself some time, copy this for undocumented things: Sets the Actor's alpha level to fAlpha, where fAlpha is in the range 0..1. - Makes the Actor switch between two colors immediately. See Themerdocs/effect_colors.txt for an example. + Makes the Actor switch between two colors immediately. + See Docs/Themerdocs/effect_colors.txt + for an example. Sets the Actor's bottom edge color to c. @@ -1069,13 +1187,17 @@ save yourself some time, copy this for undocumented things: Sets the Actor's lower right corner color to c. - Makes the Actor switch between two colors, jumping back to the first after reaching the second. See Themerdocs/effect_colors.txt for an example. + Makes the Actor switch between two colors, jumping back to the first after reaching the second. + See Docs/Themerdocs/effect_colors.txt + for an example. Sets the Actor's right edge color to c. - Makes the Actor shift between two colors smoothly. See Themerdocs/effect_colors.txt for an example. + Makes the Actor shift between two colors smoothly. + See Docs/Themerdocs/effect_colors.txt + for an example. Sets the Actor's top edge color to c. @@ -1178,8 +1300,8 @@ save yourself some time, copy this for undocumented things: Returns the Actor's current effect delta. - - Returns the Actor's current effect magnitude as three floats (not one; I hate Lua.xsd). + + Returns the Actor's current effect magnitude as three floats. Returns the Actor's current glow color. @@ -1196,15 +1318,17 @@ save yourself some time, copy this for undocumented things: Returns the Actor's current height. - + + Returns the Actor's current X, Y, and Z rotation in degrees as three separate floats. + - Returns the Actor's current X rotation. + Returns the Actor's current X rotation in degrees. - Returns the Actor's current Y rotation. + Returns the Actor's current Y rotation in degrees. - Returns the Actor's current Z rotation. + Returns the Actor's current Z rotation in degrees. Returns the number of seconds into the currently running effect (e.g. diffuseshift, bob). @@ -1231,13 +1355,19 @@ save yourself some time, copy this for undocumented things: Sets the Actor's glow color. - Makes the Actor glow between two colors immediately. See Themerdocs/effect_colors.txt for an example. + Makes the Actor glow between two colors immediately. + See Docs/Themerdocs/effect_colors.txt + for an example. - Makes the Actor glow between two colors smoothly, jumping back to the first at the end. See Themerdocs/effect_colors.txt for an example. + Makes the Actor glow between two colors smoothly, jumping back to the first at the end. + See Docs/Themerdocs/effect_colors.txt + for an example. - Makes the Actor glow between two colors smoothly. See Themerdocs/effect_colors.txt for an example. + Makes the Actor glow between two colors smoothly. + See Docs/Themerdocs/effect_colors.txt + for an example. Set the fractional horizontal alignment of the Actor according to fAlign which should be a float in the range 0..1. An alignment of 0 is left aligned while an alignment of 1 is right aligned. See for the common case. @@ -1261,7 +1391,8 @@ save yourself some time, copy this for undocumented things: Hurries up an Actor's tweening by factor. - Plays the commands that follow at a normal rate, where fRate is in seconds. + Plays the commands that follow at a normal (linear) rate, where fRate is in seconds.
+ linear is a basic tween command, along with , , , and . [02 Lyrics.lua] Plays the lyric command for the specified side ("Back" or "Front"). @@ -1300,13 +1431,13 @@ save yourself some time, copy this for undocumented things: Sets the roll of this Actor to fRoll. - Set the Actor's rotation on the X axis to fAlign. + Set the Actor's rotation on the X axis to fRotation degrees. - Set the Actor's rotation on the Y axis to fAlign. + Set the Actor's rotation on the Y axis to fRotation degrees. - Set the Actor's rotation on the Z axis to fAlign. + Set the Actor's rotation on the Z axis to fRotation degrees. @@ -1366,7 +1497,9 @@ save yourself some time, copy this for undocumented things: Tells the Actor to spin. Can use to define different spinning behavior. - + + spring is a basic tween command, along with , , , and . + Stops any effect the Actor has. @@ -1383,8 +1516,11 @@ save yourself some time, copy this for undocumented things: Determines if the Actor should use texture wrapping or not. - Uses type to determine the tween to use. The type must be one of the TweenType enum values. If the type is note TweenType_Bezier, the params table is ignored. If the type is TweenType_Bezier, then the params table must have 4 or 8 numbers. 4 numbers in the params creates a 1 dimensional bezier curve, 8 numbers creates a 2 dimensional bezier curve.
- It's usually more convenient to use Actor:linear, Actor:accelerate, and so on, rather than using Actor:tween directly. + Generic method for tweening an actor.
+ time is in seconds. type is a
+ If the type is TweenType_Bezier, then the params table must have 4 or 8 numbers. 4 numbers creates a 1 dimensional bezier curve, 8 numbers creates a 2 dimensional bezier curve.
+ If the type is not TweenType_Bezier, the params table is ignored.
+ It's usually more convenient to use , , , or rather than using Actor:tween() directly. Set the fractional vertical alignment of the Actor according to fAlign which should be a float in the range 0..1. An alignment of 0 is top aligned while an alignment of 1 is bottom aligned. See for the common case. @@ -1475,7 +1611,67 @@ save yourself some time, copy this for undocumented things: Sets the x and y location of the Actor in one command. - + + + ActorFrames are containers that allow multiple children actors to be grouped and scripted together.
+ In theming, the StepMania engine expects a screen layer (underlay, overlay, decorations, in, out, cancel) + file to return one actor, and it is common to return one ActorFrame that contains many actors of various + specialization.
+ A common convention is to add children at the next index (current size of the table plus 1).
+ Basic example: +

+-- in the context of a lua file as a screen layer
+-- this ActorFrame is a table
+local af = Def.ActorFrame{}
+
+-- add a Sprite at the next index
+af[#af+1] = Def.Sprite{
+	Texture="smilingsun.png"
+}
+
+-- add a BitmapText at the next index
+af[#af+1] = Def.BitmapText{
+	Font="Common normal",
+	Text="Yo!"
+}
+
+-- have the file return the ActorFrame
+-- for the StepMania engine to interpret
+return af
+
+ When actor commands like and + are used position and scale an ActorFrame, its children will position relative to the parent ActorFrame + and scale proportionally.
+ For example, if you want to animate 50 actors moving 100px to the right in unison, it is easier to move the + parent ActorFrame than each actor individually.
+ Basic example: +

+local af = Def.ActorFrame{}
+
+-- move the ActorFrame +100px
+-- over a 2 second duration
+-- its children will move with it
+af.OnCommand=function(self)
+	self:linear(2):addx(100)
+end
+
+-- add various children actors
+-- to the parent ActorFrame
+af[#af+1] = Def.Sprite{
+	Texture="taro.png"
+}
+
+af[#af+1] = Def.Sprite{
+	Texture="laer.png"
+}
+
+-- etc.
+
+return af
+
+ ActorFrames can contain ActorFrames, and doing so is good design for sufficiently complex screens. + + Adds a child to the ActorFrame from the specified path. @@ -1483,14 +1679,14 @@ save yourself some time, copy this for undocumented things: Sets the field of view for the ActorFrame. - Returns the child with a name of sName.
- If there are multiple children with that name, returns an array of those children.
+ Returns the child with a name of sName.
+ If there are multiple children with that name, returns an array of those children.
The table also acts as a pass through layer, function calls pass through to the last child of that name. - Returns a table of all the children in the ActorFrame.
- The table is indexed by the names of the children.
- If there are multiple children with the same name, the entry for that name is an array of those children.
+ Returns a table of all the children in the ActorFrame.
+ The table is indexed by the names of the children.
+ If there are multiple children with the same name, the entry for that name is an array of those children.
The table also acts as a pass through layer, function calls pass through to the last child of that name. @@ -1560,7 +1756,7 @@ save yourself some time, copy this for undocumented things: Sets the vanishing point for the ActorFrame. - + Creates the ActorFrameTexture. @@ -1583,7 +1779,7 @@ save yourself some time, copy this for undocumented things: Sets the Texture's name to sName. - + Adds a texture to the ActorMultiTexture. Returns the number of texture units. @@ -1603,7 +1799,7 @@ save yourself some time, copy this for undocumented things: Sets a TextureMode on the specified index. - + The list of quad states is used to determine which animation state is used for each quad. The offset is added to the AMV's current state, and the resulting state is used. @@ -1701,17 +1897,19 @@ save yourself some time, copy this for undocumented things: Sets the draw state variables to the values in the table.
- Mode must be a DrawMode.
- First is the index of the first vertex to draw.
- Num is the number of vertices to draw. -1 for Num means draw all verts after First.
+ Mode must be a .
+ First is the index of the first vertex to draw.
+ Num is the number of vertices to draw. -1 for Num means draw all verts after First.
Any value not in the table defaults to the already set value.
- Examples:
- -- Sets all three parts of the draw state.
- self:SetDrawState{Mode="DrawMode_Quads", First= 1, Num= -1}
- -- Set only the draw mode. First and Num remain unchanged from previous.
- self:SetDrawState{Mode="DrawMode_Quads"}
- -- Set the first and number to draw. Draw mode remains unchanged.
- self:SetDrawState{First= 3, Num= 4}
+ Examples: +

+-- Sets all three parts of the draw state.
+self:SetDrawState{Mode="DrawMode_Quads", First= 1, Num= -1}
+-- Set only the draw mode.  First and Num remain unchanged from previous.
+self:SetDrawState{Mode="DrawMode_Quads"}
+-- Set the first and number to draw.  Draw mode remains unchanged.
+self:SetDrawState{First= 3, Num= 4}
+
 Get the DrawMode of the destination tween state. @@ -1750,7 +1948,7 @@ save yourself some time, copy this for undocumented things: Sets the texture at from the file path path. - + Returns the target of the ActorProxy. @@ -1758,7 +1956,7 @@ save yourself some time, copy this for undocumented things: Sets the ActorProxy target to a. - + Returns the scroller's current item. @@ -1845,13 +2043,32 @@ save yourself some time, copy this for undocumented things: Sets the scroller's transform function from fItemWidth. - + - This Actor represents a playable sound. Though the C++ class is ActorSound, it is accessible to Lua via Def.Sound.
- There are three attributes that can be set as booleans on load:
+ This actor represents a playable sound. Though the C++ class is ActorSound, it is accessible to Lua via Def.Sound.
+ You must provide ActorSounds with a filepath to the asset using their File attribute. +

+Def.Sound{
+	File="./path/to/soundeffect.ogg",
+	OnCommand=function(self)
+		-- play this sound effect at the parent screen's OnCommand
+		self:play()
+	end
+}
+
+ ActorSounds have three additional boolean attributes:
• SupportPan - Let the sound pan from side to side.
• SupportRateChanging - Let the sound change rate and pitch.
- • IsAction - If true, the sound is an action sound, and will be muted if the MuteActions preference is turned on. + • IsAction - If true, the sound is an action sound, and will be muted if the MuteActions preference is turned on.
+ Basic example: +

+Def.Sound{
+	File="./path/to/soundeffect.ogg",
+	SupportPan=true,
+	SupportRateChanging=true,
+	IsAction=false,
+}
+
 Returns the that can be played by this Actor. @@ -1879,6 +2096,9 @@ save yourself some time, copy this for undocumented things: + + This singleton is accessible to Lua via ANNOUNCER. + Returns true if Announcer sAnnouncer exists. @@ -1893,6 +2113,9 @@ save yourself some time, copy this for undocumented things: + + This singleton is accessible to Lua via HOOKS. + Returns true if the application presently has focus. @@ -1900,17 +2123,17 @@ save yourself some time, copy this for undocumented things: Returns the name of the architecture in use. - + Returns true if the Banner is currently scrolling. - + Loads the background from an UnlockEntry. - + Loads the banner from an UnlockEntry. @@ -1944,7 +2167,41 @@ save yourself some time, copy this for undocumented things: - + + + BitmapText actors are used to display text on-screen.
+ The font can be specified using the Font attribute. It takes a font name a string, + pathed relative to the current theme's ./Fonts/ directory.
+ StepMania expects fonts to be formatted as spritesheets with accompanying ini files. + These can be generated from ttf files using Texture Font Generator.exe in the + ./Program/ directory of packaged StepMania releases.
+ The text displayed can be initially set using the Text attribute, and changed + later using settext().
+ Basic usage example: +

+Def.BitmapText{
+	Font="Common normal",
+	Text="Hello!",
+	OnCommand=function(self)
+		self:sleep(2):settext("Hey!")
+	end
+}
+
+
+ The font can alternatively be specified with the File attribute, + which takes the path to the ini file as a string, relative to the root of StepMania.
+ Basic example: +

+-- use a custom font from a simfile
+local song_dir = GAMESTATE:GetCurrentSong():GetSongDir()
+local ini_path = "Fonts/courier/_courier 20px.ini"
+
+Def.BitmapText{
+	File=song_dir .. ini_path,
+	Text="Hello, World!"
+}
+
+ Add the attribute attr to the string at position iPos.
@@ -2031,7 +2288,7 @@ save yourself some time, copy this for undocumented things: Wrap the unzoomed text at iWidth pixels. If you or by x and you want the text wrapped at width, then you should use wrapwidthpixels(width/x). - + Returns the text that is currently set at the exact moment you call it. This is likely only going to be useful in an Update command. @@ -2084,6 +2341,9 @@ save yourself some time, copy this for undocumented things: + + This singleton is accessible to Lua via CHARMAN. + Returns a table of all characters installed. @@ -2097,7 +2357,7 @@ save yourself some time, copy this for undocumented things: Returns the number of characters available. - + Loads the ComboGraph commands from the Metrics in group sMetricsGroup. @@ -2105,7 +2365,7 @@ save yourself some time, copy this for undocumented things: Sets the values of the ComboGraph using the specified StageStats and PlayerStageStats. - + Loads the ControllerStateDisplay from the specified GameController. @@ -2199,7 +2459,7 @@ save yourself some time, copy this for undocumented things: Returns true if the Course is a ranking course. - + Sets the CourseContentsList from the GameState. @@ -2232,6 +2492,9 @@ save yourself some time, copy this for undocumented things: + + This singleton is accessible to Lua via CRYPTMAN. + Generates a random UUID (version 4). @@ -2334,7 +2597,13 @@ save yourself some time, copy this for undocumented things: Destroys the spline, freeing the memory allocated for it. This can only be called on splines created with create_spline(). - + + + A newline-delimited list of available input devices.
+ The list shown will the same as that returned by INPUTMAN:GetDescriptions(), but with "MonkeyKeyboard" removed. + + + Sets the DifficultyIcon's state from the difficulty passed in. @@ -2408,7 +2677,7 @@ save yourself some time, copy this for undocumented things: - + Returns the index of the last banner loaded. @@ -2449,7 +2718,7 @@ save yourself some time, copy this for undocumented things: See . - + Sets the StepsDisplayList from the GameState. @@ -2534,6 +2803,9 @@ save yourself some time, copy this for undocumented things: + + This singleton is accessible to Lua via GAMEMAN. + Return the first for the specified game. @@ -2543,7 +2815,7 @@ save yourself some time, copy this for undocumented things: Return the localized string representation of st. - + Returns a table of all selectable games. @@ -2557,6 +2829,9 @@ save yourself some time, copy this for undocumented things: + + This singleton is accessible to Lua via SOUND. + Set the music volume to fVolume for fDuration seconds. @@ -2587,6 +2862,9 @@ save yourself some time, copy this for undocumented things: + + This singleton is accessible to Lua via GAMESTATE. + Adds another stage to the specifed player. @@ -2606,15 +2884,17 @@ save yourself some time, copy this for undocumented things: The second argument is optional. Apply the GameCommand represented by sCommand for pn, if given. See . - - Checks various things to determine whether the game will crash when gameplay starts. Returns false and a string if gameplay cannot be entered safely.
+ + Checks various things to determine whether the game will crash when gameplay starts. Returns false and an error string if gameplay cannot be entered safely.
Might not work in all cases, but will catch things like a player not having steps set or no current song or style. Mainly exists for people with a custom ScreenSelectMusic replacement.
- Example:
- local can, reason= GAMESTATE:CanSafelyEnterGameplay()
- if not can then
- lua.ReportScriptError("Cannot safely enter gameplay: " .. tostring(reason))
- end
+ Example: +

+local can, reason = GAMESTATE:CanSafelyEnterGameplay()
+if not can then
+	lua.ReportScriptError("Cannot safely enter gameplay: " .. tostring(reason))
+end
+
 Removes any stage modifiers that are illegal for course play. @@ -2634,7 +2914,7 @@ save yourself some time, copy this for undocumented things: Returns the current for the specified . - + Returns the current . @@ -2988,7 +3268,7 @@ save yourself some time, copy this for undocumented things: Unjoins player pn. - + Loads the GradeDisplay commands from the Metrics in group sMetricsGroup. @@ -2996,7 +3276,7 @@ save yourself some time, copy this for undocumented things: Sets the GradeDisplay to show Grade g. - + Loads the GraphDisplay commands from the Metrics in group sMetricsGroup. @@ -3004,7 +3284,7 @@ save yourself some time, copy this for undocumented things: Sets the values of the GraphDisplay using the specified StageStats and PlayerStageStats. - + Sets the GrooveRadar values for Player pn to empty. @@ -3015,7 +3295,7 @@ save yourself some time, copy this for undocumented things: Sets the GrooveRadar values for Player pn to the specified (floating point) values in the table. - + Returns two tables representing the tips and alternate tips in the HelpDisplay. @@ -3090,12 +3370,15 @@ save yourself some time, copy this for undocumented things: Returns the rank of the highest score for name in the list. Returns 0 if there is no score for name in the list. (returns 1 if name has the top score, 2 if name has the second place score, and so on) - + Loads the HoldJudgment for the specified MultiPlayer. + + This singleton is accessible to Lua via INPUTFILTER. + Returns the mouse wheel value. @@ -3106,6 +3389,11 @@ save yourself some time, copy this for undocumented things: Returns the Y position of the mouse. + + + A newline-delimited list of inputs that are currently being pressed. It will update as inputs are held and released. Handy for custom TestInput screens. + + Returns the amount of life left in the LifeMeter as a float in the range 0..1. @@ -3132,6 +3420,9 @@ save yourself some time, copy this for undocumented things: + + This singleton is accessible to Lua via MEMCARDMAN. + Returns true if player pn's card is locked. @@ -3171,11 +3462,14 @@ save yourself some time, copy this for undocumented things: Sets the MenuTimer's stealth setting to bStealth. If true, the timer will be invisible and silent. - + Stops the MenuTimer by setting it to 0 and pausing. + + This singleton is accessible to Lua via MESSAGEMAN. + Broadcast the message to all listeners subscribed to sMessage. The second argument is an optional table of parameters. It may be omitted or explicitly @@ -3185,12 +3479,12 @@ save yourself some time, copy this for undocumented things: Sets whether logging of messages is enabled. If log is true, all messages that pass through Broadcast (from the engine for from the theme or from anywhere else), will be logged with Trace. - + Sets the width of the MeterDisplay to fWidth. - + Returns the model's default animation. @@ -3214,7 +3508,7 @@ save yourself some time, copy this for undocumented things: Returns the number of states the Model has. - + Loads the ModIconRow of Player pn from the Metrics in group sMetricsGroup. @@ -3240,6 +3534,9 @@ save yourself some time, copy this for undocumented things: + + This singleton is accessible to Lua via NOTESKIN. + Returns a string from the specified element and value. @@ -3419,12 +3716,12 @@ save yourself some time, copy this for undocumented things: Returns true if this row forces one choice on all players. - + Sets the PaneDisplay from the GameState. - + Sets the PercentageDisplay from the specified PlayerState and PlayerStageStats. @@ -3457,12 +3754,12 @@ save yourself some time, copy this for undocumented things: - All these functions have an optional last argument: If the last argument is the boolean value true, then instead of returning the previous settings as normal, they will instead return the PlayerOptions object.
+ All these functions have an optional last argument: If the last argument is the boolean value true, then instead of returning the previous settings as normal, they will instead return the PlayerOptions object.
This allows you to chain them like this:
- player_options:Twirl(5, 1, true):Roll(5, true):Dizzy(true):Twirl()
+ player_options:Twirl(5, 1, true):Roll(5, true):Dizzy(true):Twirl()

- Special note: Functions that take a bool as their arg must have true as the second arg to be used with chaining.
- "player_options:Backwards(true, true):Beat(5)" will chain, "player_options:Backwards(true):Beat(5)" will not chain.
+ Functions that take a bool as their arg must have true as the second arg to be used with chaining.
+ player_options:Backwards(true, true):Beat(5) will chain. player_options:Backwards(true):Beat(5) will not chain.

Most options fall into one of four types: float, int, bool, or enum.
Float type options have this interface:
@@ -3471,15 +3768,25 @@ save yourself some time, copy this for undocumented things: If approach_speed is a float, sets the speed of the transition to approach_speed. Returns the previous values of both.
approach_speed is in units of n per second. value will be approached at the rate of approach_speed per second.
Note that the value and the approach speed arguments are both independently optional.
- Example:
- a,b= options:Boost() -- Sets a to the current value and b to the current approach_speed.
- a,b= options:Boost(5, .5) -- Stores the previous values in a and b, NOT to 5 and .5. Sets the value to 5 and the approach speed to .5.
- a,b= options:Boost(5) -- Sets a and b to the previous values, NOT to 5 and .5. Sets the value to 5 and leaves the approach speed at whatever it was.
+ Example: +

+-- Sets a to the current value and b to the current approach_speed
+a,b = options:Boost()
+
+-- Stores the previous values in a and b, NOT to 5 and .5
+-- Sets the value to 5 and the approach speed to .5
+a,b = options:Boost(5, .5)
+
+-- Sets a and b to the previous values, NOT to 5 and .5
+-- Sets the value to 5 and leaves the approach speed at whatever it was
+a,b = options:Boost(5)
+

Setting the approach speed only matters when modifying the PlayerOptions from ModsLevel_Song.
Int type options are similar to float in that they return and take a number, but they do not have an approach speed.
Bool type options have an almost identical interface, the difference is that they can not have an approach speed.
Enum type options are almost identical to bool type. They take and return an enum value.
+ For brevity, the functions are only given a description if the option requires careful handling or does not follow the float or bool interfaces.
 @@ -3634,7 +3941,7 @@ save yourself some time, copy this for undocumented things: - + Returns true if step attacks or random attacks are enabled. @@ -3708,11 +4015,18 @@ save yourself some time, copy this for undocumented things: - Sets the NoteSkin to the named noteskin, unless name is nil or the noteskin does not exist. Returns the name of the previous noteskin and whether the set attempt succeeded.
- Changing the noteskin during a song is not supported.
- Example:
- note_name= options:NoteSkin() -- Sets note_name to the player's current noteskin.
- prev_note_name, succeeded= options:NoteSkin("cel") -- Sets prev_note_name to the noteskin the player had set, changes the current noteskin to "cel", sets succeeded to true if the "cel" noteskin exists.
+ Sets the NoteSkin to the named noteskin, unless name is nil or the NoteSkin does not exist. Returns the name of the previous NoteSkin and whether the set attempt succeeded.
+ Changing the NoteSkin during gameplay is not supported.
+ Example: +

+-- Sets note_name to the player's current noteskin
+note_name = options:NoteSkin()
+
+-- Sets prev_note_name to the noteskin the player had set
+-- changes the current noteskin to "cel"
+-- sets succeeded to true if the "cel" noteskin exists.
+prev_note_name, succeeded = options:NoteSkin("cel")
+
 If the player is using Overhead (0 tilt, 0 skew), returns true.
@@ -3975,9 +4289,13 @@ save yourself some time, copy this for undocumented things: Returns true if the player was disqualified from ranking. + + Sets the Dance Point limits of the stage. + + @@ -4018,6 +4336,9 @@ save yourself some time, copy this for undocumented things: + + This singleton is accessible to Lua via PREFSMAN. + Return the value of the preference sPreference. @@ -4240,6 +4561,9 @@ save yourself some time, copy this for undocumented things: + + This singleton is accessible to Lua via PROFILEMAN. + Returns the Profile for the specified profile ID. @@ -4307,6 +4631,11 @@ save yourself some time, copy this for undocumented things: Sets the current stats prefix. The stats prefix is prepended to the Stats.xml file when loading or saving a profile. SetStatsPrefix will reload all profiles from the Stats.xml that has the given prefix. In general, score entries are the only thing not preserved when changing the stats prefix. Profile::HandleStatsPrefixChange in Profile.cpp lists the fields that are preserved. + + + Quads are rectangular actors that players can see. A Quad can have color, size, position, etc. + + Returns the value of rc from . @@ -4339,6 +4668,9 @@ save yourself some time, copy this for undocumented things: + + This singleton is accessible to Lua via DISPLAY. + Return the height of the display. @@ -4418,6 +4750,9 @@ save yourself some time, copy this for undocumented things: + + This singleton is accessible to Lua via FILEMAN. + Returns true if a file exists at sPath. @@ -4432,8 +4767,11 @@ save yourself some time, copy this for undocumented things: + + This singleton is accessible to Lua via INPUTMAN. + - Return an array of connected input device descriptions. + Returns an array of connected input device descriptions. @@ -4527,7 +4865,7 @@ save yourself some time, copy this for undocumented things: Reloads the texture. - + Loads the metrics for this RollingNumbers from sGroupName. @@ -4535,30 +4873,102 @@ save yourself some time, copy this for undocumented things: Sets the target number to f. - + + + Screen is the base screen class containing common methods that all specialized screens inherit.
+ By itself, Screen does not have the layers (underlay, overlay, decorations, in, out, cancel) commonly + used in theming, so themers designing custom screens typically use as + the screen class for such endeavors. + - This adds the lua function "callback" to the list of functions the screen will pass input to. Whenever an input event occurs, callback will be passed a table with the details of the event. callback must return a bool to indicate whether the event was handled. If callback returns true, the event will not be passed any further.
- This should not be used to provide text input because that would not handle localization or different keyboard layouts.
- The screen and the callbacks will both be passed input events, so be aware of what input the current screen responds to and consider the effects.
- Details of the table containing the event data:
- {
- DeviceInput= { -- The raw details of the event.
- device= string, -- The type of device. The first half of the string will be "Device_", the second half will be from InputDeviceNames in RageInputDevice.cpp.
- button= string, -- The button that was pressed. the first half of the string will be "DeviceButton_", the second half will be from InitNames in RageInputDevice.cpp.
- level= float, -- A floating point value for analog input.
- z= float, -- Mousewheel input.
- down= bool, -- Whether the button is down. This is level with a threshold and debouncing applied.
- ago= float, -- How long ago this input occurred, in seconds.
- is_joystick= bool, -- True if the device is a joystick.
- is_mouse= bool -- True if the device is a mouse.
- }, -- This ends the list of things inside the DeviceInput part of the table.
- controller= string, -- The game controller this event was mapped to. "GameController_1" or "GameController_2", or nil if the event wasn't mapped to either controller.
- button= string, -- The semi-raw button that was pressed. This is what the button was mapped to by the keymap settings, but without the conversions that occur when OnlyDedicatedMenuButtons is true. Will be empty if the button was not mapped.
- type= string, -- The type of event. "InputEventType_FirstPress", "InputEventType_Repeat", or "InputEventType_Release".
- GameButton= string, -- The cooked button that was pressed. This is button with mapping that occurs when OnlyDedicatedMenuButtons is true applied. This is nil for unmapped buttons.
- PlayerNumber= PlayerNumber, -- The player that the controller is mapped to, or nil.
- MultiPlayer= string, -- Unknown purpose.
- } + This adds the Lua function callback to the list of functions the screen will pass input to, giving Lua access to player input as it occurs.
+ When an input event occurs, callback will be passed a table with the details of the event. callback must return a bool to indicate whether the event was handled. If callback returns true, the event will not be passed any further.
+ This method does not handle localization or different keyboard layouts, so is better suited to getting text input from players.
+ Be aware that both the screen (as handled by the StepMania engine) and your Lua callbacks will be passed input events, and this can result in undesirable side effects.
+ Basic usage example: +

+local InputHandler = function( event )
+	-- do something cool with the event table in here :)
+	-- the details of the event table are documented below
+
+	-- example:
+	-- show the GameButton that was most recently pressed/held
+	if event.type ~= "InputEventType_Release" then
+		SCREENMAN:SystemMessage( event.GameButton )
+	end
+
+	return false
+end
+
+Def.ActorFrame{
+	OnCommand=function(self)
+		SCREENMAN:GetTopScreen():AddInputCallback( InputHandler )
+	end
+}
+
+ +Details of the event table: +

+{
+	-- The "semi-raw" button that was pressed. This is what
+	-- the button was mapped to by the keymap settings, without
+	-- the conversions that occur when OnlyDedicatedMenuButtons
+	--  is true. Will be empty if the button was not mapped.
+	button = string,
+
+	-- "InputEventType_FirstPress", "InputEventType_Repeat",
+	-- or "InputEventType_Release".
+	type = string,
+
+	-- The "cooked" button that was pressed.  This is button with
+	-- mapping that occurs when OnlyDedicatedMenuButtons is true
+	-- applied.  This is nil for unmapped buttons.
+	GameButton = string,
+
+	-- The player that the controller is mapped to, or nil.
+	PlayerNumber = PlayerNumber,
+
+	-- The game controller this event was mapped to.
+	-- "GameController_1" or "GameController_2", or nil if the event
+	-- wasn't mapped to either controller.
+	controller = string,
+
+	-- The details of the event.
+	DeviceInput = {
+		-- The type of device.  The first half of the string will
+		-- be "Device_", the second half will be from InputDeviceNames
+		-- in RageInputDevice.cpp.
+		device = string,
+
+		-- The button that was pressed. The first half of the string
+		-- will be "DeviceButton_", the second half will be from InitNames
+		-- in RageInputDevice.cpp.
+		button = string,
+
+		-- A floating point value for analog input.
+		level = float,
+
+		-- Mousewheel input.
+		z = float,
+
+		-- Whether the button is down.  This is level with a threshold
+		-- and debouncing applied.
+		down = bool,
+
+		-- How long ago this input occurred, in seconds.
+		ago = float,
+
+		-- True if the device is a joystick.
+		is_joystick = bool,
+
+		-- True if the device is a mouse.
+		is_mouse = bool
+	},
+
+	-- Unknown purpose. SMOnline?
+	MultiPlayer = string
+}
+
 Returns the name of the next Screen. @@ -4591,17 +5001,19 @@ save yourself some time, copy this for undocumented things: [02 Other.lua] Gets a string from the current Screen in the current language. - + + + Returns the current . - + Returns the current StageStats. - + This should behave identically to the normal back button behavior. This function is for the pause menu to use when the player forfeits or restarts, so that a score isn't saved. @@ -4630,19 +5042,19 @@ save yourself some time, copy this for undocumented things: This is part of the system for controlling how haste behaves.
- Read Docs/Themerdocs/haste.txt. + See Docs/Themerdocs/haste.txt. This is part of the system for controlling how haste behaves.
- Read Docs/Themerdocs/haste.txt. + See Docs/Themerdocs/haste.txt. This is part of the system for controlling how haste behaves.
- Read Docs/Themerdocs/haste.txt. + See Docs/Themerdocs/haste.txt. This is part of the system for controlling how haste behaves.
- Read Docs/Themerdocs/haste.txt. + See Docs/Themerdocs/haste.txt. Sets the next Screen to be loaded. @@ -4654,12 +5066,15 @@ save yourself some time, copy this for undocumented things: Pauses or unpauses the game, depending on the value of bPause. - + Returns the LifeMeter. + + This singleton is accessible to Lua via SCREENMAN. + Adds a screen at the top of the screen stack. (sMessage is an optional ScreenMessage posted once the new screen is finished.) @@ -4667,7 +5082,7 @@ save yourself some time, copy this for undocumented things: Gets the screen at the top of the screen stack. - Returns whether the input for the player has been redirected away from the normal screen input function. Input that has been redirected is only sent to lua input callbacks. + Returns whether the input for the player has been redirected away from the normal screen input function. Input that has been redirected is only sent to Lua input callbacks. Plays the invalid sound. @@ -4697,14 +5112,14 @@ save yourself some time, copy this for undocumented things: Sets the next screen to s. - Sets whether the input for the player has been redirected away from the normal screen input function. Input that has been redirected is only sent to lua input callbacks.
- This can be useful when putting a custom menu on a screen, and you want to disable the built in actors while the menu is open. Then you handle input through an input callback until the player closes the menu. + Sets whether the input for the player has been redirected away from the normal screen input function. Input that has been redirected is only sent to Lua input callbacks.
+ This can be useful when putting a custom menu on a screen, and you want to disable the built in actors while the menu is open. You can handle input through an input callback until the player closes the menu. Broadcasts a system message. - + Returns true if Player pn backspaced successfully. @@ -4732,12 +5147,18 @@ save yourself some time, copy this for undocumented things: Gets the currently selected letter of Player pn. - + Returns the number of active players. - + + + + + + + Returns true if all active players are on the last options row. @@ -4754,12 +5175,12 @@ save yourself some time, copy this for undocumented things: Returns the specified OptionRow. - + Returns true if we are going to PlayerOptions. - + Continues to the next screen. @@ -4767,7 +5188,7 @@ save yourself some time, copy this for undocumented things: Returns true if there is a profile that can be loaded. - + Continues to the next screen. @@ -4775,12 +5196,12 @@ save yourself some time, copy this for undocumented things: Returns true if there is a profile that can be saved. - + Returns player pn's current selected item as an integer. - + Returns false if the options list is already open or the UseOptionsList metric is false. @@ -4800,7 +5221,7 @@ save yourself some time, copy this for undocumented things: [02 StageMods.lua] Sets up modifiers for non-course modes. - + Tells the screen to go to the previous screen. @@ -4812,21 +5233,79 @@ save yourself some time, copy this for undocumented things: Returns the profile index of the specified Player. - Sets the profile index of Player pn to iProfileIndex.
- The following values of iProfileIndex have special, hardcoded behavior:
- • -1: join the player and play the theme's start sound effect
+ Sets the profile index of Player pn to iProfileIndex.
+ The following values of iProfileIndex have special, hardcoded behavior:
+ • -1: join the player and play the theme's start sound effect
• -2: unjoin the player, unlock their MemoryCard, and unmount their MemoryCard - + - TextEntrySettings is implemented similar to the Attributes in BitmapText. Formatting issues prevent the sample from being properly shown here.
Please see docs/Themerdocs/ScreenTextEntry.txt for the TextEntrySettings format. + Using ScreenTextEntry is the preferred way to get text input from players.
+ For theming, ScreenTextEntry is unique because it is typically added temporarily to the engine's + screen stack to be popped off the stack when the player is done entering text.
+ As such, it is commonly styled to appear to players as an overlay or modal.
+ Basic usage example: +

+local args = {
+	Question="Do you like Waffles?",
+	InitialAnswer="Yeah, we like waffles!",
+	MaxInputLength=300,
+	OnOK=function(answer)
+		-- answer is what the player typed
+		local msg = "Your response was: " .. answer
+		SCREENMAN:SystemMessage(msg)
+	end
+}
+
+SCREENMAN:AddNewScreenToTop("ScreenTextEntry")
+SCREENMAN:GetTopScreen():Load( args )
+
 - Sets up a ScreenTextEntry's values. + Sets up a ScreenTextEntry's values using args.
+ TextEntrySettings is special struct for ScreenTextEntry, and + as a Lua table, it should contain specific attributes: +

+local args = {
+	-- ScreenMessage to send on pop
+	-- optional, "SM_None" if omitted
+	SendOnPop = "",
+
+	-- the question text to display
+	Question = "",
+
+	-- initial answer text
+	InitialAnswer = "",
+
+	-- Maximum amount of characters
+	MaxInputLength = 0,
+
+	-- mask character input (optional)
+	Password = false,
+
+	-- validation function
+	-- must return boolean and string
+	Validate = function(answer, errorStr) end,
+
+	-- function called on ok
+	OnOK = function(answer) end,
+
+	-- function called on cancel
+	OnCancel = function() end,
+
+	-- Validate appending a character 
+	-- must return boolean
+	ValidateAppend = function(answer, append) end,
+
+	-- Format answer for display
+	-- must return string
+	FormatAnswerForDisplay = function(answer) end
+}
+
 - + Tells the screen to go to the previous screen. @@ -4840,26 +5319,32 @@ save yourself some time, copy this for undocumented things: Sets whether the screen allows late joining. This only works for screens that are just ScreenWithMenuElements, as most derived screens have their own hard coded function for whether late joining is allowed. + + Returns an array of all the available objects for a . - Returns the path to the song's background image. + Returns the path to the song's background image.
+ If the stepartist did not provide a path for a background, this returns nil. - Returns the path to the song's banner. + Returns the path to the song's banner.
+ If the stepartist did not provide a path for a banner, this returns nil. Returns a table with all the data for the song's BGCHANGES line.
Each element of the table is one change like this:
- {start_beat= 1.0, rate= 1.0, transition= "example", effect= "example", file1= "example", file2= "example", color1= "#FFFFFFFF", color2= "#FFFFFFFF"} + {start_beat=1.0, rate=1.0, transition="example", effect="example", file1="example", file2="example", color1="#FFFFFFFF", color2="#FFFFFFFF"} - Returns the path to the song's CD image. + Returns the path to the song's CD image.
+ If the stepartist did not provide a path for a CDImage, this returns nil. - Gets the path to the CDTitle. + Gets the path to the CDTitle.
+ If the stepartist did not provide a path for a CDTitle, this returns nil. Returns the path to the song's disc image (different from CD, think Pump). @@ -4871,13 +5356,17 @@ save yourself some time, copy this for undocumented things: Returns a table of 2 floats containing the display BPMs. - Returns the displayed full title of the song, including subtitle. + Returns the displayed full title of the song.
+ The full title is, at minimum, the main title. + If the subtitle is not an empty string, + the full title is main title + " " + subtitle. Returns the displayed main title of the song. - Returns the displayed subtitle of the song. + Returns the displayed subtitle of the song.
+ If the stepartist did not provide a subtitle, this returns an empty string. Returns the first beat of the song. @@ -5041,6 +5530,9 @@ save yourself some time, copy this for undocumented things: + + This singleton is accessible to Lua via SONGMAN. + Returns true if the specified course group exists. @@ -5071,8 +5563,8 @@ save yourself some time, copy this for undocumented things: Returns a table with all of the courses in the specified group. - - Returns the extra stage info (Song, Steps) for the specified Style s. (If bExtra2 is true, it will use the second Extra Stage data instead of the first. Again, Lua.xsd sucks) + + Returns the extra stage info (Song, Steps) for the specified Style s. If b2ndExtra is true, it will use the second Extra Stage data instead of the first. Returns the number of courses loaded via Additional folders. @@ -5216,7 +5708,26 @@ save yourself some time, copy this for undocumented things: Returns the warp destination length. - + + + Sprite actors can be used to display images and video. If you want to load a png as part of your UI, + or animate a visual effect from a sprite sheet, or play a video file, Sprite is what you're looking for.
+
+ You can initialize Sprites with a filepath to the graphic asset using their Texture attribute. +

+local spr = Def.Sprite{
+	Texture="path/to/mycoolimage.png"
+}
+
+ Frame-based animated sprites can be initialized with the Frames attribute. +

+local spr = Def.Sprite{
+	Texture="path/to/Spikes 6x3.png",
+	Frames=Sprite.LinearFrames(18, 1)
+}
+
+ + Returns the length of the animation in seconds. @@ -5233,7 +5744,8 @@ save yourself some time, copy this for undocumented things: Returns the Sprite's texture. - [02 Sprite.lua] Returns a Frames table consisting of iNumFrames frames lasting for a total of fSeconds seconds. This function is not a member function and should be used as Frames = Sprite.LinearFrames( 5, 2.6 ). + [02 Sprite.lua] Returns a Frames table consisting of iNumFrames frames lasting for a total of fSeconds seconds.
+ This function is not a member function and should be used as Frames = Sprite.LinearFrames( 5, 2.6 ). If sPath is nil, then unload the texture. Otherwise, load the texture at path sPath. @@ -5276,19 +5788,29 @@ save yourself some time, copy this for undocumented things: Sets the number of seconds into the animation to fSeconds. - + Sets the properties of the states of the sprite. The properties table is identical to the "Frames" table that can be put in the sprite when calling Def.Sprite.
- Example:
- {{Frame= 0, Delay= .016, {0, 0}, {.25, .25}},
- {Frame= 1, Delay= .016, {0, 0}, {.25, .25}},
- {Frame= 2, Delay= .016, {0, 0}, {.25, .25}},
- {Frame= 3, Delay= .016, {0, 0}, {.25, .25}},
- }
- Frame is optional, defaulting to 0.
- Delay is optional, defaulting to 0.
+ Example: +

+{
+	{ Frame=0, Delay=0.333, {0, 0}, {.25, .25} },
+	{ Frame=1, Delay=0.333, {0, 0}, {.25, .25} },
+	{ Frame=2, Delay=0.333, {0, 0}, {.25, .25} },
+	{ Frame=3, Delay=0.333, {0, 0}, {.25, .25} },
+}
+
+ Frame is optional, defaulting to 0.
+ Delay is optional, defaulting to 0.
The two tables are optional upper left and lower right corners of the fraction of the frame to use. The example makes the sprite only use the upper left corner of each frame.
- Simpler example:
- {{Frame= 0, Delay= .016}, {Frame= 1, Delay= .016}, {Frame= 2, Delay= .016}, {Frame= 3, Delay= .016}}
+ Simpler example: +

+{
+	{Frame=0, Delay=0.333},
+	{Frame=1, Delay=0.333},
+	{Frame=2, Delay=0.333},
+	{Frame=3, Delay=0.333}
+}
+
This example makes the sprite use the whole of each frame. @@ -5370,6 +5892,9 @@ save yourself some time, copy this for undocumented things: + + This singleton is accessible to Lua via STATSMAN. + Returns the accumulated played StageStats. @@ -5469,7 +5994,7 @@ save yourself some time, copy this for undocumented things: Returns true if the Steps use different TimingData from the Song. - + Loads the StepsDisplay commands from the Metrics in group sMetricsGroup. @@ -5500,11 +6025,11 @@ save yourself some time, copy this for undocumented things: Returns the StyleType for this Style. - Returns a table containing the Track, XOffset, and Name of the column.
+ Returns a table containing the Track, XOffset, and Name of the column.
For example, calling GAMESTATE:GetCurrentStyle():GetColumnInfo('PlayerNumber_P1', 2) when the current - game is dance will return {Track=2, XOffset=-32, Name="Down"}.
+ game is dance will return {Track=2, XOffset=-32, Name="Down"}.
Calling GAMESTATE:GetCurrentStyle():GetColumnInfo('PlayerNumber_P1', 1) when the current - game is pump will return {Track=1, XOffset=-96, Name="DownLeft"}.
+ game is pump will return {Track=1, XOffset=-96, Name="DownLeft"}.
 Returns the draw order of the column. @@ -5563,7 +6088,7 @@ save yourself some time, copy this for undocumented things: - + Returns the of the Hold Note. @@ -5588,7 +6113,7 @@ save yourself some time, copy this for undocumented things: Returns true if the note was initiated. - + Loads the TextBanner from the specified metrics group. @@ -5600,6 +6125,9 @@ save yourself some time, copy this for undocumented things: + + This singleton is accessible to Lua via THEME. + Returns true if the specified language exists in the current theme. @@ -5636,8 +6164,10 @@ save yourself some time, copy this for undocumented things: Returns the path of an element in the Graphics folder. - - returns three strings: BGAnimation ResolvedPath, MatchingMetricsGroup, MatchingElement. Used in LoadFallbackB in themes/_fallback/02 Other.lua. (Lua.xsd sucks) + + Returns three strings: BGAnimation ResolvedPath, MatchingMetricsGroup, MatchingElement.
+ Used in LoadFallbackB in themes/_fallback/02 Other.lua
+ Example: local path, metrics_group, element = THEME:GetPathInfoB("ScreenTitleJoin", "decorations") Returns the path of an element in the Other folder. @@ -5660,6 +6190,16 @@ save yourself some time, copy this for undocumented things: Returns the display name of the current theme. + + Returns a table of strings showing what themes the current theme falls back on.
+ For example, if the current theme is in a folder named "Home", and the "Home" theme falls back on the "default" theme, which itself falls back on the "_fallback" theme, the table would be: +

+{
+	[1]="Home",
+	[2]="default",
+	[3]="_fallback"
+}
+ Returns true if the theme has the specified metric. @@ -5684,19 +6224,24 @@ save yourself some time, copy this for undocumented things: GetBPMsAndTimes, GetStops, GetDelays, GetLabels, GetWarps, GetCombos, GetTimeSignatures, GetTickcounts, GetFakes, GetScrolls, and GetSpeeds all have two different modes.
- If false (or nothing) is the argument to these functions, they return tables of strings. The strings are numbers separated by '='.
- If the argument is true, they return tables of tables, and the inner tables contain numbers as described for each function.
- The first form is kept around and is the default for compatibility with older themes. The advantage of the second form is that you no longer need to have a bit of code in your theme to transform the string into a table of numbers before you can use it.
- Example:
- local bpmsand= timing_data:GetBPMsAndTimes()
- for i, s in ipairs(bpmsand) do
- local sand= split("=", s)
- bpmsand[i]= {tonumber(sand[1]), tonumber(sand[2])}
- end
- -- do something that looks at all the bpms and times.
- Becomes:
- local bpmsand= timing_data:GetBPMsAndTimes(true)
- -- do something that looks at all the bpms and times.
+ If false (or nothing) is the argument to these functions, they return tables of strings. The strings are numbers separated by '='.
+ If the argument is true, they return tables of tables, and the inner tables contain numbers as described for each function.
+ The first form is kept as the default to maintain compatibility with older themes. The second form can be convenient because there is no need to transform the string into a table of numbers before using it.
+ Example of first form: +

+local bpms_and_times = timing_data:GetBPMsAndTimes()
+for i, s in ipairs(bpms_and_times) do
+	local bpm_and_time = split("=", s)
+	bpms_and_times[i] = {tonumber(bpm_and_time[1]), tonumber(bpm_and_time[2])}
+end
+-- do something with the bpms and times now that they are numbers.
+
+
+ Example of second form: +

+local bpms_and_times = timing_data:GetBPMsAndTimes(true)
+-- do something with the bpms and times because they are already numbers.
+
 Returns the minimum and maximum BPM of the song in a table (in that order). @@ -5889,6 +6434,9 @@ save yourself some time, copy this for undocumented things: + + This singleton is accessible to Lua via UNLOCKMAN. + Returns true if there are any unlocks to celebrate. @@ -5977,7 +6525,7 @@ save yourself some time, copy this for undocumented things: A specific case where this is known to happen is commands that trigger on CurrentSongChanged because the music wheel clears the current song before it finishes loading if the current song is longer than the number of stages remaining. - + Sets the WorkoutGraph from the current Workout. @@ -5986,8 +6534,23 @@ save yourself some time, copy this for undocumented things: + + + StepMania's enums are exposed to Lua as global tables. Note that although the enum values start at 0, these global Lua tables are indexed starting at 1.
+ Functions that require enums as arguments will accept either the string constant or number value.
+ For example, accepts a PlayerNumber and Difficulty as arguments. + Each of these is valid way to set P1's preferred difficulty to hard:
+

+-- using strings
+GAMESTATE:SetPreferredDifficulty( "PlayerNumber_P1", "Difficulty_Hard" )
+-- using values
+GAMESTATE:SetPreferredDifficulty( 0, 3 )
+-- using global Lua tables
+GAMESTATE:SetPreferredDifficulty( PlayerNumber[1], Difficulty[4] )
+
+ Blending modes. See . @@ -6004,4 +6567,75 @@ save yourself some time, copy this for undocumented things: + + + + + The StepMania engine uses singletons internally when it needs only one instance of a class.
+ Each singleton has a class name (e.g. RageDisplay, NoteSkinManager, etc.) from the C++ engine, and a similar (but different) userdata name available to Lua (e.g. DISPLAY, NOTESKIN, etc.).
+Simple examples: +

+-- use GameState's singleton to get the current song
+local song = GAMESTATE:GetCurrentSong()
+
+-- use ScreenManager's singleton to briefly show text on-screen
+SCREENMAN:SystemMessage("hello from Lua!")
+
+ + + + + + + + + Actors are the basic building blocks used to script content for StepMania. When the player + sees and interacts with something on-screen, like a menu system or a 3D model of a dancing + character, that something is an actor.
+
+ Each of these actors is available to Lua as a function within the global Def table.
+
+ As functions, each actor accepts a table as an argument, and that table contains attributes + and commands that define how the actor will behave when rendered by the StepMania engine.
+
+ Basic examples: +

+-- Sprite, Sound, and Quad are each Actors with unique specializations
+local spr = Def.Sprite{ Texture="./path/to/image.png" }
+local snd = Def.Sound{ File="./path/to/soundeffect.ogg" }
+local sqr = Def.Quad{ InitCommand=function(self) self:xy(80, 100) end }
+
+-- common convention is to not use () with actor
+-- functions, but syntax like this is also valid
+local args = { Texture="./path/to/image.png" }
+local spr  = Def.Sprite(args)
+
+ + + + + + For players, screens are individual units of a game cycle that they interact with. Most players + understand there is a place where gameplay occurs (ScreenGameplay) that is different than the + place used to choose the next song (ScreenSelectMusic).
+
+ For scripters, screens are collections of distinct actors wrapped up in a single + ActorFrame. That ActorFrame is the "screen" that players interact with.
+
+ To be available in a theme, screens must be defined in that theme's metrics.ini file with the + desired name between square brackets like [ScreenTitleJoin] or + [ScreenPlayerOptions].
+
+ The StepMania engine defines many, many classes of screens, each with unique specialization + not directly available to Lua. For now, the screens documented here are only those with methods + available to Lua. + + + diff --git a/StepmaniaCore.cmake b/StepmaniaCore.cmake index dcab93cef0..99d5a36a92 100644 --- a/StepmaniaCore.cmake +++ b/StepmaniaCore.cmake @@ -365,17 +365,17 @@ elseif(MACOSX) MAC_FRAME_OPENGL MAC_FRAME_SYSTEM) elseif(LINUX) - if(WITH_GTK2) - find_package("GTK2" 2.0) - if(${GTK2_FOUND}) - set(HAS_GTK2 TRUE) + if(WITH_GTK3) + find_package("GTK3" 2.0) + if(${GTK3_FOUND}) + set(HAS_GTK3 TRUE) else() - set(HAS_GTK2 FALSE) + set(HAS_GTK3 FALSE) message( - "GTK2 was not found on your system. There will be no loading window.") + "GTK3 was not found on your system. There will be no loading window.") endif() else() - set(HAS_GTK2 FALSE) + set(HAS_GTK3 FALSE) endif() set(HAS_X11 FALSE) diff --git a/extern/CMakeProject-png.cmake b/extern/CMakeProject-png.cmake index 8b4a525a4c..ed4d09f79a 100644 --- a/extern/CMakeProject-png.cmake +++ b/extern/CMakeProject-png.cmake @@ -3,31 +3,35 @@ if(WITH_SYSTEM_PNG) set(PNG_LIBRARIES ${PNG_LIBRARIES} PARENT_SCOPE) else() set(PNG_SRC - "libpng/include/png.c" - "libpng/include/pngerror.c" - "libpng/include/pngget.c" - "libpng/include/pngmem.c" - "libpng/include/pngpread.c" - "libpng/include/pngread.c" - "libpng/include/pngrio.c" - "libpng/include/pngrtran.c" - "libpng/include/pngrutil.c" - "libpng/include/pngset.c" - "libpng/include/pngtest.c" - "libpng/include/pngtrans.c" - "libpng/include/pngwio.c" - "libpng/include/pngwrite.c" - "libpng/include/pngwtran.c" - "libpng/include/pngwutil.c") + "libpng/png.c" + "libpng/pngerror.c" + "libpng/pngget.c" + "libpng/pngmem.c" + "libpng/pngpread.c" + "libpng/pngread.c" + "libpng/pngrio.c" + "libpng/pngrtran.c" + "libpng/pngrutil.c" + "libpng/pngset.c" + "libpng/pngtest.c" + "libpng/pngtrans.c" + "libpng/pngwio.c" + "libpng/pngwrite.c" + "libpng/pngwtran.c" + "libpng/pngwutil.c") + + configure_file("libpng/scripts/pnglibconf.h.prebuilt" + "libpng/pnglibconf.h" + COPYONLY) set(PNG_HPP - "libpng/include/png.h" - "libpng/include/pngconf.h" - "libpng/include/pngdebug.h" - "libpng/include/pnginfo.h" - "libpng/include/pnglibconf.h" - "libpng/include/pngpriv.h" - "libpng/include/pngstruct.h") + "libpng/png.h" + "libpng/pngconf.h" + "libpng/pngdebug.h" + "libpng/pnginfo.h" + "libpng/pnglibconf.h" + "libpng/pngpriv.h" + "libpng/pngstruct.h") source_group("" FILES ${PNG_SRC}) source_group("" FILES ${PNG_HPP}) @@ -42,5 +46,9 @@ else() sm_add_compile_definition("png" _CRT_SECURE_NO_WARNINGS) endif() - target_include_directories("png" PUBLIC "zlib") + target_include_directories("png" PUBLIC + "zlib" + $ + $ + ) endif() diff --git a/extern/libpng/ANNOUNCE b/extern/libpng/ANNOUNCE new file mode 100644 index 0000000000..ecf9c7043b --- /dev/null +++ b/extern/libpng/ANNOUNCE @@ -0,0 +1,47 @@ +libpng 1.6.37 - April 14, 2019 +============================== + +This is a public release of libpng, intended for use in production code. + + +Files available for download +---------------------------- + +Source files with LF line endings (for Unix/Linux): + + * libpng-1.6.37.tar.xz (LZMA-compressed, recommended) + * libpng-1.6.37.tar.gz + +Source files with CRLF line endings (for Windows): + + * lp1637.7z (LZMA-compressed, recommended) + * lp1637.zip + +Other information: + + * README.md + * LICENSE.md + * AUTHORS.md + * TRADEMARK.md + + +Changes since the previous public release (version 1.6.36) +---------------------------------------------------------- + + * Fixed a use-after-free vulnerability (CVE-2019-7317) in png_image_free. + * Fixed a memory leak in the ARM NEON implementation of png_do_expand_palette. + * Fixed a memory leak in pngtest.c. + * Fixed two vulnerabilities (CVE-2018-14048, CVE-2018-14550) in + contrib/pngminus; refactor. + * Changed the license of contrib/pngminus to MIT; refresh makefile and docs. + (Contributed by Willem van Schaik) + * Fixed a typo in the libpng license v2. + (Contributed by Miguel Ojeda) + * Added makefiles for AddressSanitizer-enabled builds. + * Cleaned up various makefiles. + + +Send comments/corrections/commendations to png-mng-implement at lists.sf.net. +Subscription is required; visit +https://lists.sourceforge.net/lists/listinfo/png-mng-implement +to subscribe. diff --git a/extern/libpng/AUTHORS b/extern/libpng/AUTHORS new file mode 100644 index 0000000000..79a3d10361 --- /dev/null +++ b/extern/libpng/AUTHORS @@ -0,0 +1,45 @@ +PNG REFERENCE LIBRARY AUTHORS +============================= + +This is the list of PNG Reference Library ("libpng") Contributing +Authors, for copyright and licensing purposes. + + * Andreas Dilger + * Cosmin Truta + * Dave Martindale + * Eric S. Raymond + * Gilles Vollant + * Glenn Randers-Pehrson + * Greg Roelofs + * Guy Eric Schalnat + * James Yu + * John Bowler + * Kevin Bracey + * Magnus Holmgren + * Mandar Sahastrabuddhe + * Mans Rullgard + * Matt Sarett + * Mike Klein + * Paul Schmidt + * Sam Bushell + * Samuel Williams + * Simon-Pierre Cadieux + * Tim Wegner + * Tom Lane + * Tom Tanner + * Vadim Barkov + * Willem van Schaik + * Zhijie Liang + * Arm Holdings + - Richard Townsend + * Google Inc. + - Matt Sarett + - Mike Klein + +The build projects, the build scripts, the test scripts, and other +files in the "projects", "scripts" and "tests" directories, have other +copyright owners, but are released under the libpng license. + +Some files in the "contrib" directory, and some tools-generated files +that are distributed with libpng, have other copyright owners, and are +released under other open source licenses. diff --git a/extern/libpng/include/CHANGES b/extern/libpng/CHANGES similarity index 61% rename from extern/libpng/include/CHANGES rename to extern/libpng/CHANGES index 70af8273e7..f0b0a9342c 100644 --- a/extern/libpng/include/CHANGES +++ b/extern/libpng/CHANGES @@ -1,11 +1,13 @@ -#if 0 CHANGES - changes for libpng -Version 0.2 +version 0.1 [March 29, 1995] + initial work-in-progress release + +version 0.2 [April 1, 1995] added reader into png.h fixed small problems in stub file -Version 0.3 +version 0.3 [April 8, 1995] added pull reader split up pngwrite.c to several files added pnglib.txt @@ -14,9 +16,9 @@ Version 0.3 fixed some bugs in writer interfaced with zlib 0.5 added K&R support - added check for 64 KB blocks for 16-bit machines + added check for 64 KB blocks for 16 bit machines -Version 0.4 +version 0.4 [April 26, 1995] cleaned up code and commented code simplified time handling into png_time created png_color_16 and png_color_8 to handle color needs @@ -27,28 +29,29 @@ Version 0.4 cleaned up zTXt reader and writer (using zlib's Reset functions) split transformations into pngrtran.c and pngwtran.c -Version 0.5 +version 0.5 [April 30, 1995] interfaced with zlib 0.8 fixed many reading and writing bugs saved using 3 spaces instead of tabs -Version 0.6 +version 0.6 [May 1, 1995] + first beta release added png_large_malloc() and png_large_free() added png_size_t cleaned up some compiler warnings added png_start_read_image() -Version 0.7 +version 0.7 [June 24, 1995] cleaned up lots of bugs finished dithering and other stuff added test program changed name from pnglib to libpng -Version 0.71 [June, 1995] +version 0.71 [June 26, 1995] changed pngtest.png for zlib 0.93 fixed error in libpng.txt and example.c -Version 0.8 +version 0.8 [August 20, 1995] cleaned up some bugs added png_set_filler() split up pngstub.c into pngmem.c, pngio.c, and pngerror.c @@ -91,7 +94,7 @@ Version 0.88 [January, 1996] cleaned up documentation added callbacks for read/write and warning/error functions -Version 0.89 [July, 1996] +Version 0.89 [June 5, 1996] Added new initialization API to make libpng work better with shared libs we now have png_create_read_struct(), png_create_write_struct(), png_create_info_struct(), png_destroy_read_struct(), and @@ -118,6 +121,9 @@ Version 0.89 [July, 1996] New pngtest image also has interlacing and zTXt Updated documentation to reflect new API +Version 0.89c [June 17, 1996] + Bug fixes. + Version 0.90 [January, 1997] Made CRC errors/warnings on critical and ancillary chunks configurable libpng will use the zlib CRC routines by (compile-time) default @@ -158,7 +164,7 @@ Version 0.95 [March, 1997] Added new pCAL chunk read/write support Added experimental filter selection weighting (Greg Roelofs) Removed old png_set_rgbx() and png_set_xrgb() functions that have been - obsolete for about 2 years now (use png_set_filler() instead) + obsolete for about 2 years now (use png_set_filler() instead) Added macros to read 16- and 32-bit ints directly from buffer, to be used only on those systems that support it (namely PowerPC and 680x0) With some testing, this may become the default for MACOS/PPC systems. @@ -440,7 +446,7 @@ Version 1.0.3 [January 14, 1999] Version 1.0.3a [August 12, 1999] Added check for PNG_READ_INTERLACE_SUPPORTED in pngread.c; issue a warning - if an attempt is made to read an interlaced image when it's not supported. + if an attempt is made to read an interlaced image when it's not supported. Added check if png_ptr->trans is defined before freeing it in pngread.c Modified the Y2K statement to include versions back to version 0.71 Fixed a bug in the check for valid IHDR bit_depth/color_types in pngrutil.c @@ -448,7 +454,7 @@ Version 1.0.3a [August 12, 1999] Replaced leading blanks with tab characters in makefile.hux Changed "dworkin.wustl.edu" to "ccrc.wustl.edu" in various documents. Changed (float)red and (float)green to (double)red, (double)green - in png_set_rgb_to_gray() to avoid "promotion" problems in AIX. + in png_set_rgb_to_gray() to avoid "promotion" problems in AIX. Fixed a bug in pngconf.h that omitted when PNG_DEBUG==0 (K Bracey). Reformatted libpng.3 and libpngpf.3 with proper fonts (script by J. vanZandt). Updated documentation to refer to the PNG-1.2 specification. @@ -491,7 +497,7 @@ Version 1.0.3d [September 4, 1999] Added new png_expand functions to scripts/pngdef.pas and pngos2.def Added a demo read_user_transform_fn that examines the row filters in pngtest.c -Version 1.0.4 [September 24, 1999] +Version 1.0.4 [September 24, 1999, not distributed publicly] Define PNG_ALWAYS_EXTERN in pngconf.h if __STDC__ is defined Delete #define PNG_INTERNAL and include "png.h" from pngasmrd.h Made several minor corrections to pngtest.c @@ -518,6 +524,7 @@ Version 1.0.4c [October 1, 1999] Added a "png_check_version" function in png.c and pngtest.c that will generate a helpful compiler error if an old png.h is found in the search path. Changed type of png_user_transform_depth|channels from int to png_byte. + Added "Libpng is OSI Certified Open Source Software" statement to png.h Version 1.0.4d [October 6, 1999] Changed 0.45 to 0.45455 in png_set_sRGB() @@ -585,7 +592,7 @@ Version 1.0.5e [November 30, 1999] with trailing compressed parts easier in the future, and added new functions png_free_iCCP, png_free_pCAL, png_free_sPLT, png_free_text, png_get_iCCP, png_get_spalettes, png_set_iCCP, png_set_spalettes (Eric S. Raymond). - NOTE: Applications that write text chunks MUST define png_text->lang + NOTE: Applications that write text chunks MUST define png_text->lang before calling png_set_text(). It must be set to NULL if you want to write tEXt or zTXt chunks. If you want your application to be able to run with older versions of libpng, use @@ -825,7 +832,7 @@ Version 1.0.7beta11 [May 7, 2000] Removed the new PNG_CREATED_READ_STRUCT and PNG_CREATED_WRITE_STRUCT modes which are no longer used. Eliminated the three new members of png_text when PNG_LEGACY_SUPPORTED is - defined or when neither PNG_READ_iTXt_SUPPORTED nor PNG_WRITE_iTXT_SUPPORTED + defined or when neither PNG_READ_iTXt_SUPPORTED nor PNG_WRITE_iTXt_SUPPORTED is defined. Made PNG_NO_READ|WRITE_iTXt the default setting, to avoid memory overrun when old applications fill the info_ptr->text structure directly. @@ -904,7 +911,7 @@ Version 1.0.7 [July 1, 2000] Version 1.0.8beta1 [July 8, 2000] Added png_free(png_ptr, key) two places in pngpread.c to stop memory leaks. Changed PNG_NO_STDIO to PNG_NO_CONSOLE_IO, several places in pngrutil.c and - pngwutil.c. + pngwutil.c. Changed PNG_EXPORT_VAR to use PNG_IMPEXP, in pngconf.h. Removed unused "#include " from png.c Added WindowsCE support. @@ -912,12 +919,12 @@ Version 1.0.8beta1 [July 8, 2000] Version 1.0.8beta2 [July 10, 2000] Added project files to the wince directory and made further revisions - of pngtest.c, pngrio.c, and pngwio.c in support of WindowsCE. + of pngtest.c, pngrio.c, and pngwio.c in support of WindowsCE. Version 1.0.8beta3 [July 11, 2000] Only set the PNG_FLAG_FREE_TRNS or PNG_FREE_TRNS flag in png_handle_tRNS() - for indexed-color input files to avoid potential double-freeing trans array - under some unusual conditions; problem was introduced in version 1.0.6f. + for indexed-color input files to avoid potential double-freeing trans array + under some unusual conditions; problem was introduced in version 1.0.6f. Further revisions to pngtest.c and files in the wince subdirectory. Version 1.0.8beta4 [July 14, 2000] @@ -1089,16 +1096,16 @@ Version 1.2.0beta3 [May 17, 2001] Version 1.2.0beta4 [June 23, 2001] Check for missing profile length field in iCCP chunk and free chunk_data - in case of truncated iCCP chunk. + in case of truncated iCCP chunk. Bumped shared-library number to 3 in makefile.sgi and makefile.sggcc Bumped dll-number from 2 to 3 in makefile.cygwin Revised contrib/gregbook/rpng*-x.c to avoid a memory leak and to exit cleanly - if user attempts to run it on an 8-bit display. + if user attempts to run it on an 8-bit display. Updated contrib/gregbook Use png_malloc instead of png_zalloc to allocate palette in pngset.c Updated makefile.ibmc Added some typecasts to eliminate gcc 3.0 warnings. Changed prototypes - of png_write_oFFS width and height from png_uint_32 to png_int_32. + of png_write_oFFS width and height from png_uint_32 to png_int_32. Updated example.c Revised prototypes for png_debug_malloc and png_debug_free in pngtest.c @@ -1106,9 +1113,9 @@ Version 1.2.0beta5 [August 8, 2001] Revised contrib/gregbook Revised makefile.gcmmx Revised pnggccrd.c to conditionally compile some thread-unsafe code only - when PNG_THREAD_UNSAFE_OK is defined. + when PNG_THREAD_UNSAFE_OK is defined. Added tests to prevent pngwutil.c from writing a bKGD or tRNS chunk with - value exceeding 2^bit_depth-1 + value exceeding 2^bit_depth-1 Revised makefile.sgi and makefile.sggcc Replaced calls to fprintf(stderr,...) with png_warning() in pnggccrd.c Removed restriction that do_invert_mono only operate on 1-bit opaque files @@ -1446,11 +1453,12 @@ Version 1.2.6beta4 [July 28, 2004] sequential read support. Added some "#if PNG_WRITE_SUPPORTED" blocks. Added #ifdef to remove some redundancy in png_malloc_default(). - Use png_malloc instead of png_zalloc to allocate the pallete. + Use png_malloc instead of png_zalloc to allocate the palette. Version 1.0.16rc1 and 1.2.6rc1 [August 4, 2004] - Fixed buffer overflow vulnerability in png_handle_tRNS() - Fixed integer arithmetic overflow vulnerability in png_read_png(). + Fixed buffer overflow vulnerability (CVE-2004-0597) in png_handle_tRNS(). + Fixed NULL dereference vulnerability (CVE-2004-0598) in png_handle_iCCP(). + Fixed integer overflow vulnerability (CVE-2004-0599) in png_read_png(). Fixed some harmless bugs in png_handle_sBIT, etc, that would cause duplicate chunk types to go undetected. Fixed some timestamps in the -config version @@ -1493,7 +1501,7 @@ Version 1.0.16rc4 and 1.2.6rc4 [August 10, 2004] Version 1.0.16rc5 and 1.2.6rc5 [August 10, 2004] Moved "PNG_HANDLE_CHUNK_*" macros out of PNG_ASSEMBLER_CODE_SUPPORTED - section of png.h where they were inadvertently placed in version rc3. + section of png.h where they were inadvertently placed in version rc3. Version 1.2.6 and 1.0.16 [August 15, 2004] Revised pngtest so memory allocation testing is only done when PNG_DEBUG==1. @@ -2102,7 +2110,7 @@ Version 1.4.0beta24 [July 25, 2008] png_decompress_chunk(), and remove "chunkdata" from parameter list. Put a call to png_check_chunk_name() in png_read_chunk_header(). Revised png_check_chunk_name() to reject a name with a lowercase 3rd byte. - Removed two calls to png_check_chunk_name() occuring later in the process. + Removed two calls to png_check_chunk_name() occurring later in the process. Define PNG_NO_ERROR_NUMBERS by default in pngconf.h Version 1.4.0beta25 [July 30, 2008] @@ -2325,7 +2333,7 @@ Version 1.4.0beta63 [June 15, 2009] Version 1.4.0beta64 [June 24, 2009] Eliminated PNG_LEGACY_SUPPORTED code. Moved the various unknown chunk macro definitions outside of the - PNG_READ|WRITE_ANCILLARY_CHUNK_SUPPORTED blocks. + PNG_READ|WRITE_ANCILLARY_CHUNK_SUPPORTED blocks. Version 1.4.0beta65 [June 26, 2009] Added a reference to the libpng license in each file. @@ -3250,7 +3258,7 @@ Version 1.5.2beta01 [February 13, 2011] Revised PNG_EXPORTA macro to not use an empty parameter, to accommodate the old VisualC++ preprocessor. Turned on interlace handling in png_read_png(). - Fixed gcc pendantic warnings. + Fixed gcc pedantic warnings. Handle longjmp in Cygwin. Fixed png_get_current_row_number() in the interlaced case. Cleaned up ALPHA flags and transformations. @@ -3350,7 +3358,7 @@ Version 1.5.3beta05 [May 6, 2011] Pass "" instead of '\0' to png_default_error() in png_err(). This mistake was introduced in libpng-1.2.20beta01. This fixes CVE-2011-2691. Added PNG_WRITE_OPTIMIZE_CMF_SUPPORTED macro to make the zlib "CMF" byte - optimization configureable. + optimization configurable. IDAT compression failed if preceded by a compressed text chunk (bug introduced in libpng-1.5.3beta01-02). This was because the attempt to reset the zlib stream in png_write_IDAT happened after the first IDAT @@ -3634,7 +3642,7 @@ Version 1.5.6beta05 [October 12, 2011] Fixed bug in png_write_chunk_header() debug print, introduced in 1.5.6beta01. Version 1.5.6beta06 [October 17, 2011] - Removed two redundant tests for unitialized row. + Removed two redundant tests for uninitialized row. Fixed a relatively harmless memory overwrite in compressed text writing with a 1 byte zlib buffer. Add ability to call png_read_update_info multiple times to pngvalid.c. @@ -3672,14 +3680,15 @@ Version 1.5.6 [November 3, 2011] No changes. Version 1.5.7beta01 [November 4, 2011] - Added support for ARM processor (Mans Rullgard) + Added support for ARM processor, when decoding all PNG up-filtered rows + and any other-filtered rows with 3 or 4 bytes per pixel (Mans Rullgard). Fixed bug in pngvalid on early allocation failure; fixed type cast in pngmem.c; pngvalid would attempt to call png_error() if the allocation of a png_struct or png_info failed. This would probably have led to a crash. The pngmem.c implementation of png_malloc() included a cast to png_size_t which would fail on large allocations on 16-bit systems. Fix for the preprocessor of the Intel C compiler. The preprocessor - splits adjacent @ signs with a space; this changes the concatentation + splits adjacent @ signs with a space; this changes the concatenation token from @-@-@ to PNG_JOIN; that should work with all compiler preprocessors. Paeth filter speed improvements from work by Siarhei Siamashka. This @@ -3725,7 +3734,7 @@ Version 1.5.7beta03 [November 17, 2011] gray (on palette) itself. Fixes for C++ compilation using g++ When libpng source is compiled using g++. The compiler imposes C++ rules on the C source; thus it - is desireable to make the source work with either C or C++ rules + is desirable to make the source work with either C or C++ rules without throwing away useful error information. This change adds png_voidcast to allow C semantic (void*) cases or the corresponding C++ static_cast operation, as appropriate. @@ -3746,8 +3755,9 @@ Version 1.5.7beta04 [November 17, 2011] Version 1.5.7beta05 [November 25, 2011] Removed "zTXt" from warning in generic chunk decompression function. - Validate time settings passed to pngset() and png_convert_to_rfc1123() - (Frank Busse). + Validate time settings passed to png_set_tIME() and png_convert_to_rfc1123() + (Frank Busse). Note: This prevented CVE-2015-7981 from affecting + libpng-1.5.7 and later. Added MINGW support to CMakeLists.txt Reject invalid compression flag or method when reading the iTXt chunk. Backed out 'simplified' API changes. The API seems too complex and there @@ -3775,90 +3785,2325 @@ Version 1.5.7rc03 [December 7, 2011] Version 1.5.7 [December 15, 2011] Minor fixes to pngvalid.c for gcc 4.6.2 compatibility to remove warnings reported by earlier versions. + Fixed minor memset/sizeof errors in pngvalid.c. -Version 1.5.8beta01 [January 15, 2011] - Removed '#include config.h"' from contrib/libtests/pngvalid.c. It's not - needed and causes trouble for VPATH building. +Version 1.6.0beta01 [December 15, 2011] + Removed machine-generated configure files from the GIT repository (they will + continue to appear in the tarball distributions and in the libpng15 and + earlier GIT branches). + Restored the new 'simplified' API, which was started in libpng-1.5.7beta02 + but later deleted from libpng-1.5.7beta05. + Added example programs for the new 'simplified' API. + Added ANSI-C (C90) headers and require them, and take advantage of the + change. Also fixed some of the projects/* and contrib/* files that needed + updates for libpng16 and the move of pngvalid.c. + With this change the required ANSI-C header files are assumed to exist: the + implementation must provide float.h, limits.h, stdarg.h and stddef.h and + libpng relies on limits.h and stddef.h existing and behaving as defined + (the other two required headers aren't used). Non-ANSI systems that don't + have stddef.h or limits.h will have to provide an appropriate fake + containing the relevant types and #defines. + Dropped support for 16-bit platforms. The use of FAR/far has been eliminated + and the definition of png_alloc_size_t is now controlled by a flag so + that 'small size_t' systems can select it if necessary. Libpng 1.6 may + not currently work on such systems -- it seems likely that it will + ask 'malloc' for more than 65535 bytes with any image that has a + sufficiently large row size (rather than simply failing to read such + images). + New tools directory containing tools used to generate libpng code. + Fixed race conditions in parallel make builds. With higher degrees of + parallelism during 'make' the use of the same temporary file names such + as 'dfn*' can result in a race where a temporary file from one arm of the + build is deleted or overwritten in another arm. This changes the + temporary files for suffix rules to always use $* and ensures that the + non-suffix rules use unique file names. + +Version 1.6.0beta02 [December 21, 2011] + Correct configure builds where build and source directories are separate. + The include path of 'config.h' was erroneously made relative in pngvalid.c + in libpng 1.5.7. + +Version 1.6.0beta03 [December 22, 2011] + Start-up code size improvements, error handler flexibility. These changes + alter how the tricky allocation of the initial png_struct and png_info + structures are handled. png_info is now handled in pretty much the same + way as everything else, except that the allocations handle NULL return + silently. png_struct is changed in a similar way on allocation and on + deallocation a 'safety' error handler is put in place (which should never + be required). The error handler itself is changed to permit mismatches + in the application and libpng error buffer size; however, this means a + silent change to the API to return the jmp_buf if the size doesn't match + the size from the libpng compilation; libpng now allocates the memory and + this may fail. Overall these changes result in slight code size + reductions; however, this is a reduction in code that is always executed + so is particularly valuable. Overall on a 64-bit system the libpng DLL + decreases in code size by 1733 bytes. pngerror.o increases in size by + about 465 bytes because of the new functionality. + Added png_convert_to_rfc1123_buffer() and deprecated png_convert_to_rfc1123() + to avoid including a spurious buffer in the png_struct. + +Version 1.6.0beta04 [December 30, 2011] + Regenerated configure scripts with automake-1.11.2 + Eliminated png_info_destroy(). It is now used only in png.c and only calls + one other internal function and memset(). + Enabled png_get_sCAL_fixed() if floating point APIs are enabled. Previously + it was disabled whenever internal fixed point arithmetic was selected, + which meant it didn't exist even on systems where FP was available but not + preferred. + Added pngvalid.c compile time checks for const APIs. + Implemented 'restrict' for png_info and png_struct. Because of the way + libpng works both png_info and png_struct are always accessed via a + single pointer. This means adding C99 'restrict' to the pointer gives + the compiler some opportunity to optimize the code. This change allows + that. Moved AC_MSG_CHECKING([if libraries can be versioned]) later to the proper location in configure.ac (Gilles Espinasse). + Changed png_memcpy to C assignment where appropriate. Changed all those + uses of png_memcpy that were doing a simple assignment to assignments + (all those cases where the thing being copied is a non-array C L-value). + Added some error checking to png_set_*() routines. + Removed the reference to the non-exported function png_memcpy() from + example.c. + Fixed the Visual C 64-bit build - it requires jmp_buf to be aligned, but + it had become misaligned. + Revised contrib/pngminus/pnm2png.c to avoid warnings when png_uint_32 + and unsigned long are of different sizes. + +Version 1.6.0beta05 [January 15, 2012] + Updated manual with description of the simplified API (copied from png.h) Fix bug in pngerror.c: some long warnings were being improperly truncated (CVE-2011-3464, bug introduced in libpng-1.5.3beta05). -Version 1.5.8rc01 [January 21, 2012] - No changes. - -Version 1.5.8rc02 [January 25, 2012] +Version 1.6.0beta06 [January 24, 2012] + Added palette support to the simplified APIs. This commit + changes some of the macro definitions in png.h, app code + may need corresponding changes. + Increased the formatted warning buffer to 192 bytes. + Added color-map support to simplified API. This is an initial version for + review; the documentation has not yet been updated. Fixed Min/GW uninstall to remove libpng.dll.a - Conditionalize the install rules for MINGW and CYGWIN in CMakeLists.txt -Version 1.5.8 [February 1, 2012] - No changes. +Version 1.6.0beta07 [January 28, 2012] + Eliminated Intel icc/icl compiler warnings. The Intel (GCC derived) + compiler issues slightly different warnings from those issued by the + current vesions of GCC. This eliminates those warnings by + adding/removing casts and small code rewrites. + Updated configure.ac from autoupdate: added --enable-werror option. + Also some layout regularization and removal of introduced tab characters + (replaced with 3-character indentation). Obsolete macros identified by + autoupdate have been removed; the replacements are all in 2.59 so + the pre-req hasn't been changed. --enable-werror checks for support + for -Werror (or the given argument) in the compiler. This mimics the + gcc configure option by allowing -Werror to be turned on safely; without + the option the tests written in configure itself fail compilation because + they cause compiler warnings. + Rewrote autogen.sh to run autoreconf instead of running tools one-by-one. + Conditionalize the install rules for MINGW and CYGWIN in CMakeLists.txt and + set CMAKE_LIBRARY_OUTPUT_DIRECTORY to "lib" on all platforms (C. Yapp). + Freeze libtool files in the 'scripts' directory. This version of autogen.sh + attempts to dissuade people from running it when it is not, or should not, + be necessary. In fact, autogen.sh does not work when run in a libpng + directory extracted from a tar distribution anymore. You must run it in + a GIT clone instead. + Added two images to contrib/pngsuite (1-bit and 2-bit transparent grayscale), + and renamed three whose names were inconsistent with those in + pngsuite/README.txt. -Version 1.5.9beta01 [February 3, 2012] - Rebuilt configure scripts in the tar distributions. +Version 1.6.0beta08 [February 1, 2012] + Fixed Image::colormap misalignment in pngstest.c + Check libtool/libtoolize version number (2.4.2) in configure.ac + Divide test-pngstest.sh into separate pngstest runs for basic and + transparent images. + Moved automake options to AM_INIT_AUTOMAKE in configure.ac + Added color-tests, silent-rules (Not yet implemented in Makefile.am) and + version checking to configure.ac + Improved pngstest speed by not doing redundant tests and add const to + the background parameter of png_image_finish_read. The --background + option is now done automagically only when required, so that commandline + option no longer exists. + Cleaned up pngpriv.h to consistently declare all functions and data. + Also eliminated PNG_CONST_DATA, which is apparently not needed but we + can't be sure until it is gone. + Added symbol prefixing that allows all the libpng external symbols + to be prefixed (suggested by Reuben Hawkins). + Updated "ftbb*.png" list in the owatcom and vstudio projects. + Fixed 'prefix' builds on clean systems. The generation of pngprefix.h + should not require itself. + Updated INSTALL to explain that autogen.sh must be run in a GIT clone, + not in a libpng directory extracted from a tar distribution. -Version 1.5.9beta02 [February 16, 2012] - Removed two unused definitions from scripts/pnglibconf.h.prebuilt +Version 1.6.0beta09 [February 1, 2012] + Reverted the prebuilt configure files to libpng-1.6.0beta05 condition. + +Version 1.6.0beta10 [February 3, 2012] + Added Z_SOLO for zlib-1.2.6+ and correct pngstest tests + Updated list of test images in CMakeLists.txt + Updated the prebuilt configure files to current condition. + Revised INSTALL information about autogen.sh; it works in tar distributions. + +Version 1.6.0beta11 [February 16, 2012] + Fix character count in pngstest command in projects/owatcom/pngstest.tgt + Revised test-pngstest.sh to report PASS/FAIL for each image. + Updated documentation about the simplified API. + Corrected estimate of error in libpng png_set_rgb_to_gray API. The API is + extremely inaccurate for sRGB conversions because it uses an 8-bit + intermediate linear value and it does not use the sRGB transform, so it + suffers from the known instability in gamma transforms for values close + to 0 (see Poynton). The net result is that the calculation has a maximum + error of 14.99/255; 0.5/255^(1/2.2). pngstest now uses 15 for the + permitted 8-bit error. This may still not be enough because of arithmetic + error. Removed some unused arrays (with #ifdef) from png_read_push_finish_row(). + Fixed a memory overwrite bug in simplified read of RGB PNG with + non-linear gamma Also bugs in the error checking in pngread.c and changed + quite a lot of the checks in pngstest.c to be correct; either correctly + written or not over-optimistic. The pngstest changes are insufficient to + allow all possible RGB transforms to be passed; pngstest cmppixel needs + to be rewritten to make it clearer which errors it allows and then changed + to permit known inaccuracies. Removed tests for no-longer-used *_EMPTY_PLTE_SUPPORTED from pngstruct.h + Fixed fixed/float API export conditionals. 1) If FIXED_POINT or + FLOATING_POINT options were switched off, png.h ended up with lone ';' + characters. This is not valid ANSI-C outside a function. The ';' + characters have been moved inside the definition of PNG_FP_EXPORT and + PNG_FIXED_EXPORT. 2) If either option was switched off, the declaration + of the corresponding functions were completely omitted, even though some + of them are still used internally. The result is still valid, but + produces warnings from gcc with some warning options (including -Wall). The + fix is to cause png.h to declare the functions with PNG_INTERNAL_FUNCTION + when png.h is included from pngpriv.h. + Check for invalid palette index while reading paletted PNG. When one is + found, issue a warning and increase png_ptr->num_palette accordingly. + Apps are responsible for checking to see if that happened. -Version 1.5.9rc01 [February 17, 2012] +Version 1.6.0beta12 [February 18, 2012] + Do not increase num_palette on invalid_index. + Relocated check for invalid palette index to pngrtran.c, after unpacking + the sub-8-bit pixels. Fixed CVE-2011-3026 buffer overrun bug. This bug was introduced when iCCP chunk support was added at libpng-1.0.6. Deal more correctly with the test on iCCP chunk length. Also removed spurious casts that may hide problems on 16-bit systems. -Version 1.5.9 [February 18, 2012] - No changes. - -Version 1.5.10beta01 [February 24, 2012] - Removed two useless #ifdef directives from pngread.c and one from pngrutil.c - Always put the CMAKE_LIBRARY in "lib" (removed special WIN32 case). - Removed empty vstudio/pngstest directory (Clifford Yapp). +Version 1.6.0beta13 [February 24, 2012] Eliminated redundant png_push_read_tEXt|zTXt|iTXt|unknown code from pngpread.c and use the sequential png_handle_tEXt, etc., in pngrutil.c; now that png_ptr->buffer is inaccessible to applications, the special handling is no longer useful. - Fixed bug with png_handle_hIST with odd chunk length (Frank Busse). - Added PNG_SAFE_LIMITS feature to pnglibconf.dfa and code in pngconf.h - to reset the user limits to safe ones if PNG_SAFE_LIMITS is defined. - To enable, use "CPPFLAGS=-DPNG_SAFE_LIMITS_SUPPORTED" on the configure - command or put "#define PNG_SAFE_LIMITS_SUPPORTED" in pnglibconf.h. - Revised the SAFE_LIMITS feature to be the same as the feature in libpng16. - Added information about the new limits in the manual. + Added PNG_SAFE_LIMITS feature to pnglibconf.dfa, pngpriv.h, and new + pngusr.dfa to reset the user limits to safe ones if PNG_SAFE_LIMITS is + defined. To enable, use "CPPFLAGS=-DPNG_SAFE_LIMITS_SUPPORTED=1" on the + configure command or put #define PNG_SAFE_LIMITS_SUPPORTED in + pnglibconf.h.prebuilt and pnglibconf.h. -Version 1.5.10beta02 [February 27, 2012] +Version 1.6.0beta14 [February 27, 2012] + Added information about the new limits in the manual. Updated Makefile.in -Version 1.5.10beta03 [March 6, 2012] +Version 1.6.0beta15 [March 2, 2012] Removed unused "current_text" members of png_struct and the png_free() of png_ptr->current_text from pngread.c - Added palette-index checking. Issue a png_warning() if an invalid index is - found. + Rewrote pngstest.c for substantial speed improvement. + Fixed transparent pixel and 16-bit rgb tests in pngstest and removed a + spurious check in pngwrite.c + Added PNG_IMAGE_FLAG_FAST for the benefit of applications that store + intermediate files, or intermediate in-memory data, while processing + image data with the simplified API. The option makes the files larger + but faster to write and read. pngstest now uses this by default; this + can be disabled with the --slow option. + Improved pngstest fine tuning of error numbers, new test file generator. + The generator generates images that test the full range of sample values, + allow the error numbers in pngstest to be tuned and checked. makepng + also allows generation of images with extra chunks, although this is + still work-in-progress. + Added check for invalid palette index while reading. + Fixed some bugs in ICC profile writing. The code should now accept + all potentially valid ICC profiles and reject obviously invalid ones. + It now uses png_error() to do so rather than casually writing a PNG + without the necessary color data. + Removed whitespace from the end of lines in all source files and scripts. -Version 1.5.10beta04 [March 10, 2012] - Fixed PNG_LIBPNG_BUILD_BASE_TYPE definition. - Fixed CMF optimization of non-IDAT compressed chunks, which was added at - libpng-1.5.4. It sometimes produced too small of a window. +Version 1.6.0beta16 [March 6, 2012] + Relocated palette-index checking function from pngrutil.c to pngtrans.c + Added palette-index checking while writing. + Changed png_inflate() and calling routines to avoid overflow problems. + This is an intermediate check-in that solves the immediate problems and + introduces one performance improvement (avoiding a copy via png_ptr->zbuf.) + Further changes will be made to make ICC profile handling more secure. + Fixed build warnings (MSVC, GCC, GCC v3). Cygwin GCC with default options + declares 'index' as a global, causing a warning if it is used as a local + variable. GCC 64-bit warns about assigning a (size_t) (unsigned 64-bit) + to an (int) (signed 32-bit). MSVC, however, warns about using the + unary '-' operator on an unsigned value (even though it is well defined + by ANSI-C to be ~x+1). The padding calculation was changed to use a + different method. Removed the tests on png_ptr->pass. + Added contrib/libtests/tarith.c to test internal arithmetic functions from + png.c. This is a libpng maintainer program used to validate changes to the + internal arithmetic functions. + Made read 'inflate' handling like write 'deflate' handling. The read + code now claims and releases png_ptr->zstream, like the write code. + The bug whereby the progressive reader failed to release the zstream + is now fixed, all initialization is delayed, and the code checks for + changed parameters on deflate rather than always calling + deflatedEnd/deflateInit. + Validate the zTXt strings in pngvalid. + Added code to validate the windowBits value passed to deflateInit2(). + If the call to deflateInit2() is wrong a png_warning will be issued + (in fact this is harmless, but the PNG data produced may be sub-optimal). -Version 1.5.10beta05 [March 10, 2012] +Version 1.6.0beta17 [March 10, 2012] + Fixed PNG_LIBPNG_BUILD_BASE_TYPE definition. Reject all iCCP chunks after the first, even if the first one is invalid. + Deflate/inflate was reworked to move common zlib calls into single + functions [rw]util.c. A new shared keyword check routine was also added + and the 'zbuf' is no longer allocated on progressive read. It is now + possible to call png_inflate() incrementally. A warning is no longer + issued if the language tag or translated keyword in the iTXt chunk + has zero length. + If benign errors are disabled use maximum window on ancillary inflate. + This works round a bug introduced in 1.5.4 where compressed ancillary + chunks could end up with a too-small windowBits value in the deflate + header. + +Version 1.6.0beta18 [March 16, 2012] Issue a png_benign_error() instead of png_warning() about bad palette index. + In pngtest, treat benign errors as errors if "-strict" is present. Fixed an off-by-one error in the palette index checking function. + Fixed a compiler warning under Cygwin (Windows-7, 32-bit system) Revised example.c to put text strings in a temporary character array instead of directly assigning string constants to png_textp members. This avoids compiler warnings when -Wwrite-strings is enabled. + Added output flushing to aid debugging under Visual Studio. Unfortunately + this is necessary because the VS2010 output window otherwise simply loses + the error messages on error (they weren't flushed to the window before + the process exited, apparently!) + Added configuration support for benign errors and changed the read + default. Also changed some warnings in the iCCP and sRGB handling + from to benign errors. Configuration now makes read benign + errors warnings and write benign errors to errors by default (thus + changing the behavior on read). The simplified API always forces + read benign errors to warnings (regardless of the system default, unless + this is disabled in which case the simplified API can't be built.) -Version 1.5.10 [March 29, 2012] +Version 1.6.0beta19 [March 18, 2012] + Work around for duplicate row start calls; added warning messages. + This turns on PNG_FLAG_DETECT_UNINITIALIZED to detect app code that + fails to call one of the 'start' routines (not enabled in libpng-1.5 + because it is technically an API change, since it did normally work + before.) It also makes duplicate calls to png_read_start_row (an + internal function called at the start of the image read) benign, as + they were before changes to use png_inflate_claim. Somehow webkit is + causing this to happen; this is probably a mis-feature in the zlib + changes so this commit is only a work-round. + Removed erroneous setting of DETECT_UNINITIALIZED and added more + checks. The code now does a png_error if an attempt is made to do the + row initialization twice; this is an application error and it has + serious consequences because the transform data in png_struct is + changed by each call. + Added application error reporting and added chunk names to read + benign errors; also added --strict to pngstest - not enabled + yet because a warning is produced. + Avoid the double gamma correction warning in the simplified API. + This allows the --strict option to pass in the pngstest checks + +Version 1.6.0beta20 [March 29, 2012] + Changed chunk handler warnings into benign errors, incrementally load iCCP + Added checksum-icc.c to contrib/tools Prevent PNG_EXPAND+PNG_SHIFT doing the shift twice. + Recognize known sRGB ICC profiles while reading; prefer writing the + iCCP profile over writing the sRGB chunk, controlled by the + PNG_sRGB_PROFILE_CHECKS option. Revised png_set_text_2() to avoid potential memory corruption (fixes - CVE-2011-3048). + CVE-2011-3048, also known as CVE-2012-3425). -Send comments/corrections/commendations to png-mng-implement at lists.sf.net -(subscription required; visit +Version 1.6.0beta21 [April 27, 2012] + Revised scripts/makefile.darwin: use system zlib; remove quotes around + architecture list; add missing ppc architecture; add architecture options + to shared library link; don't try to create a shared lib based on missing + RELEASE variable. + Enable png_set_check_for_invalid_index() for both read and write. + Removed #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED in pngpriv.h around + declaration of png_handle_unknown(). + Added -lssp_nonshared in a comment in scripts/makefile.freebsd + and changed deprecated NOOBJ and NOPROFILE to NO_OBJ and NO_PROFILE. + +Version 1.6.0beta22 [May 23, 2012] + Removed need for -Wno-cast-align with clang. clang correctly warns on + alignment increasing pointer casts when -Wcast-align is passed. This + fixes the cases that clang warns about either by eliminating the + casts from png_bytep to png_uint_16p (pngread.c), or, for pngrutil.c + where the cast is previously verified or pngstest.c where it is OK, by + introducing new png_aligncast macros to do the cast in a way that clang + accepts. + +Version 1.6.0beta23 [June 6, 2012] + Revised CMakeLists.txt to not attempt to make a symlink under mingw. + Made fixes for new optimization warnings from gcc 4.7.0. The compiler + performs an optimization which is safe; however it then warns about it. + Changing the type of 'palette_number' in pngvalid.c removes the warning. + Do not depend upon a GCC feature macro being available for use in generating + the linker mapfile symbol prefix. + Improved performance of new do_check_palette_indexes() function (only + update the value when it actually increases, move test for whether + the check is wanted out of the function. + +Version 1.6.0beta24 [June 7, 2012] + Don't check palette indexes if num_palette is 0 (as it can be in MNG files). + +Version 1.6.0beta25 [June 16, 2012] + Revised png_set_keep_unknown_chunks() so num_chunks < 0 means ignore all + unknown chunks and all known chunks except for IHDR, PLTE, tRNS, IDAT, + and IEND. Previously it only meant ignore all unknown chunks, the + same as num_chunks == 0. Revised png_image_skip_unused_chunks() to + provide a list of chunks to be processed instead of a list of chunks to + ignore. Revised contrib/gregbook/readpng2.c accordingly. + +Version 1.6.0beta26 [July 10, 2012] + Removed scripts/makefile.cegcc from the *.zip and *.7z distributions; it + depends on configure, which is not included in those archives. + Moved scripts/chkfmt to contrib/tools. + Changed "a+w" to "u+w" in Makefile.in to fix CVE-2012-3386. + +Version 1.6.0beta27 [August 11, 2012] + Do not compile PNG_DEPRECATED, PNG_ALLOC and PNG_PRIVATE when __GNUC__ < 3. + Do not use __restrict when GNUC is <= 3.1 + Removed references to png_zalloc() and png_zfree() from the manual. + Fixed configurations where floating point is completely disabled. Because + of the changes to support symbol prefixing PNG_INTERNAL_FUNCTION declares + floating point APIs during libpng builds even if they are completely + disabled. This requires the png floating point types (png_double*) to be + declared even though the functions are never actually defined. This + change provides a dummy definition so that the declarations work, yet any + implementation will fail to compile because of an incomplete type. + Re-eliminated the use of strcpy() in pngtest.c. An unnecessary use of + strcpy() was accidentally re-introduced in libpng16; this change replaces + it with strncpy(). + Eliminated use of png_sizeof(); use sizeof() instead. + Use a consistent style for (sizeof type) and (sizeof (array)) + Cleanup of png_set_filler(). This function does very different things on + read and write. In libpng 1.6 the two cases can be distinguished and + considerable code cleanup, and extra error checking, is possible. This + makes calls on the write side that have no effect be ignored with a + png_app_error(), which can be disabled in the app using + png_set_benign_errors(), and removes the spurious use of usr_channels + on the read side. + Insist on autotools 1.12.1 for git builds because there are security issues + with 1.12 and insisting on anything less would allow 1.12 to be used. + Removed info_ptr->signature[8] from WRITE-only builds. + Add some conditions for compiling png_fixed(). This is a small function + but it requires "-lm" on some platforms. + Cause pngtest --strict to fail on any warning from libpng (not just errors) + and cause it not to fail at the comparison step if libpng lacks support + for writing chunks that it reads from the input (currently only implemented + for compressed text chunks). + Make all three "make check" test programs work without READ or WRITE support. + Now "make check" will succeed even if libpng is compiled with -DPNG_NO_READ + or -DPNG_NO_WRITE. The tests performed are reduced, but the basic reading + and writing of a PNG file is always tested by one or more of the tests. + Consistently use strlen(), memset(), memcpy(), and memcmp() instead of the + png_strlen(), png_memset(), png_memcpy(), and png_memcmp() macros. + Removed the png_sizeof(), png_strlen(), png_memset(), png_memcpy(), and + png_memcmp() macros. + Work around gcc 3.x and Microsoft Visual Studio 2010 complaints. Both object + to the split initialization of num_chunks. + +Version 1.6.0beta28 [August 29, 2012] + Unknown handling fixes and clean up. This adds more correct option + control of the unknown handling, corrects the pre-existing bug where + the per-chunk 'keep' setting is ignored and makes it possible to skip + IDAT chunks in the sequential reader (broken in earlier 1.6 versions). + There is a new test program, test-unknown.c, which is a work in progress + (not currently part of the test suite). Comments in the header files now + explain how the unknown handling works. + Allow fine grain control of unknown chunk APIs. This change allows + png_set_keep_unknown_chunks() to be turned off if not required and causes + both read and write to behave appropriately (on read this is only possible + if the user callback is used to handle unknown chunks). The change + also removes the support for storing unknown chunks in the info_struct + if the only unknown handling enabled is via the callback, allowing libpng + to be configured with callback reading and none of the unnecessary code. + Corrected fix for unknown handling in pngtest. This reinstates the + libpng handling of unknown chunks other than vpAg and sTER (including + unsafe-to-copy chunks which were dropped before) and eliminates the + repositioning of vpAg and sTER in pngtest.png by changing pngtest.png + (so the chunks are where libpng would put them). + Added "tunknown" test and corrected a logic error in png_handle_unknown() + when SAVE support is absent. Moved the shell test scripts for + contrib/libtests from the libpng top directory to contrib/libtests. + png_handle_unknown() must always read or skip the chunk, if + SAVE_UNKNOWN_CHUNKS is turned off *and* the application does not set + a user callback an unknown chunk will not be read, leading to a read + error, which was revealed by the "tunknown" test. + Cleaned up and corrected ICC profile handling. + contrib/libtests/makepng: corrected 'rgb' and 'gray' cases. profile_error + messages could be truncated; made a correct buffer size calculation and + adjusted pngerror.c appropriately. png_icc_check_* checking improved; + changed the functions to receive the correct color type of the PNG on read + or write and check that it matches the color space of the profile (despite + what the comments said before, there is danger in assuming the app will + cope correctly with an RGB profile on a grayscale image and, since it + violates the PNG spec, allowing it is certain to produce inconsistent + app behavior and might even cause app crashes.) Check that profiles + contain the tags needed to process the PNG (tags all required by the ICC + spec). Removed unused PNG_STATIC from pngpriv.h. + +Version 1.6.0beta29 [September 4, 2012] + Fixed the simplified API example programs to add the *colormap parameter + to several of he API and improved the error message if the version field + is not set. + Added contrib/examples/* to the *.zip and *.7z distributions. + Updated simplified API synopses and description of the png_image structure + in the manual. + Made makepng and pngtest produce identical PNGs, add "--relaxed" option + to pngtest. The "--relaxed" option turns off the benign errors that are + enabled by default in pre-RC builds. makepng can now write ICC profiles + where the length has not been extended to a multiple of 4, and pngtest + now intercepts all libpng errors, allowing the previously-introduced + "--strict test" on no warnings to actually work. + Improved ICC profile handling including cHRM chunk generation and fixed + Cygwin+MSVC build errors. The ICC profile handling now includes more + checking. Several errors that caused rejection of the profile are now + handled with a warning in such a way that the invalid profiles will be + read by default in release (but not pre-RC) builds but will not be + written by default. The easy part of handling the cHRM chunk is written, + where the ICC profile contains the required data. The more difficult + part plus guessing a gAMA value requires code to pass selected RGB values + through the profile. + +Version 1.6.0beta30 [October 24, 2012] + Changed ICC profile matrix/vector types to not depend on array type rules. + By the ANSI-C standard the new types should be identical to the previous + versions, and all known versions of gcc tested with the previous versions + except for GCC-4.2.1 work with this version. The change makes the ANSI-C + rule that const applied to an array of elements applies instead to the + elements in the array moot by explicitly applying const to the base + elements of the png_icc_matrix and png_icc_vector types. The accidental + (harmless) 'const' previously applied to the parameters of two of the + functions have also been removed. + Added a work around for GCC 4.2 optimization bug. + Marked the broken (bad white point) original HP sRGB profiles correctly and + correct comments. + Added -DZ_SOLO to contrib/pngminim/*/makefile to work with zlib-1.2.7 + Use /MDd for vstudio debug builds. Also added pngunkown to the vstudio + builds, fixed build errors and corrected a minor exit code error in + pngvalid if the 'touch' file name is invalid. + Add updated WARNING file to projects/vstudio from libpng 1.5/vstudio + Fixed build when using #define PNG_NO_READ_GAMMA in png_do_compose() in + pngrtran.c (Domani Hannes). + +Version 1.6.0beta31 [November 1, 2012] + Undid the erroneous change to vstudio/pngvalid build in libpng-1.6.0beta30. + Made pngvalid so that it will build outside the libpng source tree. + Made builds -DPNG_NO_READ_GAMMA compile (the unit tests still fail). + Made PNG_NO_READ_GAMMA switch off interfaces that depend on READ_GAMMA. + Prior to 1.6.0 switching off READ_GAMMA did unpredictable things to the + interfaces that use it (specifically, png_do_background in 1.4 would + simply display composite for grayscale images but do composition + with the incorrect arithmetic for color ones). In 1.6 the semantic + of -DPNG_NO_READ_GAMMA is changed to simply disable any interface that + depends on it; this obliges people who set it to consider whether they + really want it off if they happen to use any of the interfaces in + question (typically most users who disable it won't). + Fixed GUIDs in projects/vstudio. Some were duplicated or missing, + resulting in VS2010 having to update the files. + Removed non-working ICC profile support code that was mostly added to + libpng-1.6.0beta29 and beta30. There was too much code for too little + gain; implementing full ICC color correction may be desirable but is left + up to applications. + +Version 1.6.0beta32 [November 25, 2012] + Fixed an intermittent SEGV in pngstest due to an uninitialized array element. + Added the ability for contrib/libtests/makepng.c to make a PNG with just one + color. This is useful for debugging pngstest color inaccuracy reports. + Fixed error checking in the simplified write API (Olaf van der Spek) + Made png_user_version_check() ok to use with libpng version 1.10.x and later. + +Version 1.6.0beta33 [December 15, 2012] + Fixed typo in png.c (PNG_SET_CHUNK_MALLOC_MAX should be PNG_CHUNK_MALLOC_MAX) + that causes the MALLOC_MAX limit not to work (John Bowler) + Change png_warning() to png_app_error() in pngwrite.c and comment the + fall-through condition. + Change png_warning() to png_app_warning() in png_write_tRNS(). + Rearranged the ARM-NEON optimizations: Isolated the machine specific code + to the hardware subdirectory and added comments to pngrutil.c so that + implementors of other optimizations know what to do. + Fixed cases of unquoted DESTDIR in Makefile.am + Rebuilt Makefile.in, etc., with autoconf-2.69 and automake-1.12.5. + +Version 1.6.0beta34 [December 19, 2012] + Cleaned up whitespace in the synopsis portion of the manpage "libpng.3" + Disassembled the version number in scripts/options.awk (necessary for + building on SunOs). + +Version 1.6.0beta35 [December 23, 2012] + Made default Zlib compression settings be configurable. This adds #defines to + pnglibconf.h to control the defaults. + Fixed Windows build issues, enabled ARM compilation. Various warnings issued + by earlier versions of GCC fixed for Cygwin and Min/GW (which both use old + GCCs.) ARM support is enabled by default in zlib.props (unsupported by + Microsoft) and ARM compilation is made possible by deleting the check for + x86. The test programs cannot be run because they are not signed. + +Version 1.6.0beta36 [January 2, 2013] + Discontinued distributing libpng-1.x.x.tar.bz2. + Discontinued distributing libpng-1.7.0-1.6.0-diff.txt and similar. + Rebuilt configure with autoconf-2.69 (inadvertently not done in beta33) + Fixed 'make distcheck' on SUN OS - libpng.so was not being removed + +Version 1.6.0beta37 [January 10, 2013] + Fixed conceivable but difficult to repro overflow. Also added two test + programs to generate and test a PNG which should have the problem. + +Version 1.6.0beta39 [January 19, 2013] + Again corrected attempt at overflow detection in png_set_unknown_chunks() + (CVE-2013-7353). Added overflow detection in png_set_sPLT() and + png_set_text_2() (CVE-2013-7354). + +Version 1.6.0beta40 [January 20, 2013] + Use consistent handling of overflows in text, sPLT and unknown png_set_* APIs + +Version 1.6.0rc01 [January 26, 2013] + No changes. + +Version 1.6.0rc02 [February 4, 2013] + Added png_get_palette_max() function. + +Version 1.6.0rc03 [February 5, 2013] + Fixed the png_get_palette_max API. + +Version 1.6.0rc04 [February 7, 2013] + Turn serial tests back on (recently turned off by autotools upgrade). + +Version 1.6.0rc05 [February 8, 2013] + Update manual about png_get_palette_max(). + +Version 1.6.0rc06 [February 9, 2013] + Fixed missing dependency in --prefix builds The intermediate + internal 'prefix.h' file can only be generated correctly after + pnglibconf.h, however the dependency was not in Makefile.am. The + symptoms are unpredictable depending on the order make chooses to + build pngprefix.h and pnglibconf.h, often the error goes unnoticed + because there is a system pnglibconf.h to use instead. + +Version 1.6.0rc07 [February 10, 2013] + Enclosed the new png_get_palette_max in #ifdef PNG_GET_PALETTE_MAX_SUPPORTED + block, and revised pnglibconf.h and pnglibconf.h.prebuilt accordingly. + +Version 1.6.0rc08 [February 10, 2013] + Fix typo in png.h #ifdef + +Version 1.6.0 [February 14, 2013] + No changes. + +Version 1.6.1beta01 [February 16, 2013] + Made symbol prefixing work with the ARM neon optimizations. Also allow + pngpriv.h to be included for preprocessor definitions only, so it can + be used in non-C/C++ files. Back ported from libpng 1.7. + Made sRGB check numbers consistent. + Ported libpng 1.5 options.awk/dfn file handling to 1.6, fixed one bug. + Removed cc -E workround, corrected png_get_palette_max API Tested on + SUN OS cc 5.9, which demonstrates the tokenization problem previously + avoided by using /lib/cpp. Since all .dfn output is now protected in + double quotes unless it is to be macro substituted the fix should + work everywhere. + Enabled parallel tests - back ported from libpng-1.7. + scripts/pnglibconf.dfa formatting improvements back ported from libpng17. + Fixed a race condition in the creation of the build 'scripts' directory + while building with a parallel make. + Use approved/supported Android method to check for NEON, use Linux/POSIX + 1003.1 API to check /proc/self/auxv avoiding buffer allocation and other + library calls (ported from libpng15). + +Version 1.6.1beta02 [February 19, 2013] + Use parentheses more consistently in "#if defined(MACRO)" tests. + Folded long lines. + Reenabled code to allow zero length PLTE chunks for MNG. + +Version 1.6.1beta03 [February 22, 2013] + Fixed ALIGNED_MEMORY support. + Added a new configure option: + --enable-arm-neon=always will stop the run-time checks. New checks + within arm/arm_init.c will cause the code not to be compiled unless + __ARM_NEON__ is set. This should make it fail safe (if someone asks + for it on then the build will fail if it can't be done.) + Updated the INSTALL document. + +Version 1.6.1beta04 [February 27, 2013] + Revised INSTALL to recommend using CPPFLAGS instead of INCLUDES. + Revised scripts/makefile.freebsd to respect ZLIBLIB and ZLIBINC. + Revised scripts/dfn.awk to work with the buggy MSYS awk that has trouble + with CRLF line endings. + +Version 1.6.1beta05 [March 1, 2013] + Avoid a possible memory leak in contrib/gregbook/readpng.c + +Version 1.6.1beta06 [March 4, 2013] + Better documentation of unknown handling API interactions. + Corrected Android builds and corrected libpng.vers with symbol + prefixing. It also makes those tests compile and link on Android. + Added an API png_set_option() to set optimization options externally, + providing an alternative and general solution for the non-portable + run-time tests used by the ARM Neon code, using the PNG_ARM_NEON option. + The order of settings vs options in pnglibconf.h is reversed to allow + settings to depend on options and options can now set (or override) the + defaults for settings. + +Version 1.6.1beta07 [March 7, 2013] + Corrected simplified API default gamma for color-mapped output, added + a flag to change default. In 1.6.0 when the simplified API was used + to produce color-mapped output from an input image with no gamma + information the gamma assumed for the input could be different from + that assumed for non-color-mapped output. In particular 16-bit depth + input files were assumed to be sRGB encoded, whereas in the 'direct' + case they were assumed to have linear data. This was an error. The + fix makes the simplified API treat all input files the same way and + adds a new flag to the png_image::flags member to allow the + application/user to specify that 16-bit files contain sRGB data + rather than the default linear. + Fixed bugs in the pngpixel and makepng test programs. + +Version 1.6.1beta08 [March 7, 2013] + Fixed CMakelists.txt to allow building a single variant of the library + (Claudio Bley): + Introduced a PNG_LIB_TARGETS variable that lists all activated library + targets. It is an error if this variable ends up empty, ie. you have + to build at least one library variant. + Made the *_COPY targets only depend on library targets actually being build. + Use PNG_LIB_TARGETS to unify a code path. + Changed the CREATE_SYMLINK macro to expect the full path to a file as the + first argument. When symlinking the filename component of that path is + determined and used as the link target. + Use copy_if_different in the CREATE_SYMLINK macro. + +Version 1.6.1beta09 [March 13, 2013] + Eliminated two warnings from the Intel C compiler. The warnings are + technically valid, although a reasonable treatment of division would + show it to be incorrect. + +Version 1.6.1rc01 [March 21, 2013] + No changes. + +Version 1.6.1 [March 28, 2013] + No changes. + +Version 1.6.2beta01 [April 14, 2013] + Updated documentation of 1.5.x to 1.6.x changes in iCCP chunk handling. + Fixed incorrect warning of excess deflate data. End condition - the + warning would be produced if the end of the deflate stream wasn't read + in the last row. The warning is harmless. + Corrected the test on user transform changes on read. It was in the + png_set of the transform function, but that doesn't matter unless the + transform function changes the rowbuf size, and that is only valid if + transform_info is called. + Corrected a misplaced closing bracket in contrib/libtests/pngvalid.c + (Flavio Medeiros). + Corrected length written to uncompressed iTXt chunks (Samuli Suominen). + Bug was introduced in libpng-1.6.0. + +Version 1.6.2rc01 [April 18, 2013] + Added contrib/tools/fixitxt.c, to repair the erroneous iTXt chunk length + written by libpng-1.6.0 and 1.6.1. + Disallow storing sRGB information when the sRGB is not supported. + +Version 1.6.2rc02 [April 18, 2013] + Merge pngtest.c with libpng-1.7.0 + +Version 1.6.2rc03 [April 22, 2013] + Trivial spelling cleanup. + +Version 1.6.2rc04 and 1.6.2rc05 [omitted] + +Version 1.6.2rc06 [April 24, 2013] + Reverted to version 1.6.2rc03. Recent changes to arm/neon support + have been ported to libpng-1.7.0beta09 and will reappear in version + 1.6.3beta01. + +Version 1.6.2 [April 25, 2013] + No changes. + +Version 1.6.3beta01 [April 25, 2013] + Revised stack marking in arm/filter_neon.S and configure.ac. + Ensure that NEON filter stuff is completely disabled when switched 'off'. + Previously the ARM NEON specific files were still built if the option + was switched 'off' as opposed to being explicitly disabled. + +Version 1.6.3beta02 [April 26, 2013] + Test for 'arm*' not just 'arm' in the host_cpu configure variable. + Rebuilt the configure scripts. + +Version 1.6.3beta03 [April 30, 2013] + Expanded manual paragraph about writing private chunks, particularly + the need to call png_set_keep_unknown_chunks() when writing them. + Avoid dereferencing NULL pointer possibly returned from + png_create_write_struct() (Andrew Church). + +Version 1.6.3beta05 [May 9, 2013] + Calculate our own zlib windowBits when decoding rather than trusting the + CMF bytes in the PNG datastream. + Added an option to force maximum window size for inflating, which was + the behavior of libpng15 and earlier, via a new PNG_MAXIMUM_INFLATE_WINDOW + option for png_set_options(). + Added png-fix-itxt and png-fix-too-far-back to the built programs and + removed warnings from the source code and timepng that are revealed as + a result. + Detect wrong libpng versions linked to png-fix-too-far-back, which currently + only works with libpng versions that can be made to reliably fail when + the deflate data contains an out-of-window reference. This means only + 1.6 and later. + Fixed gnu issues: g++ needs a static_cast, gcc 4.4.7 has a broken warning + message which it is easier to work round than ignore. + Updated contrib/pngminus/pnm2png.c (Paul Stewart): + Check for EOF + Ignore "#" delimited comments in input file to pnm2png.c. + Fixed whitespace handling + Added a call to png_set_packing() + Initialize dimension values so if sscanf fails at least we have known + invalid values. + Attempt to detect configuration issues with png-fix-too-far-back, which + requires both the correct libpng and the correct zlib to function + correctly. + Check ZLIB_VERNUM for mismatches, enclose #error in quotes + Added information in the documentation about problems with and fixes for + the bad CRC and bad iTXt chunk situations. + +Version 1.6.3beta06 [May 12, 2013] + Allow contrib/pngminus/pnm2png.c to compile without WRITE_INVERT and + WRITE_PACK supported (writes error message that it can't read P1 or + P4 PBM files). + Improved png-fix-too-far-back usage message, added --suffix option. + Revised contrib/pngminim/*/makefile to generate pnglibconf.h with the + right zlib header files. + Separated CPPFLAGS and CFLAGS in contrib/pngminim/*/makefile + +Version 1.6.3beta07 [June 8, 2013] + Removed a redundant test in png_set_IHDR(). + Added set(CMAKE_CONFIGURATION_TYPES ...) to CMakeLists.txt (Andrew Hundt) + Deleted set(CMAKE_BUILD_TYPE) block from CMakeLists.txt + Enclose the prototypes for the simplified write API in + #ifdef PNG_STDIO_SUPPORTED/#endif + Make ARM NEON support work at compile time (not just configure time). + This moves the test on __ARM_NEON__ into pngconf.h to avoid issues when + using a compiler that compiles for multiple architectures at one time. + Removed PNG_FILTER_OPTIMIZATIONS and PNG_ARM_NEON_SUPPORTED from + pnglibconf.h, allowing more of the decisions to be made internally + (pngpriv.h) during the compile. Without this, symbol prefixing is broken + under certain circumstances on ARM platforms. Now only the API parts of + the optimizations ('check' vs 'api') are exposed in the public header files + except that the new setting PNG_ARM_NEON_OPT documents how libpng makes the + decision about whether or not to use the optimizations. + Protect symbol prefixing against CC/CPPFLAGS/CFLAGS usage. + Previous iOS/Xcode fixes for the ARM NEON optimizations moved the test + on __ARM_NEON__ from configure time to compile time. This breaks symbol + prefixing because the definition of the special png_init_filter_functions + call was hidden at configure time if the relevant compiler arguments are + passed in CFLAGS as opposed to CC. This change attempts to avoid all + the confusion that would result by declaring the init function even when + it is not used, so that it will always get prefixed. + +Version 1.6.3beta08 [June 18, 2013] + Revised libpng.3 so that "doclifter" can process it. + +Version 1.6.3beta09 [June 27, 2013] + Revised example.c to illustrate use of PNG_DEFAULT_sRGB and PNG_GAMMA_MAC_18 + as parameters for png_set_gamma(). These have been available since + libpng-1.5.4. + Renamed contrib/tools/png-fix-too-far-back.c to pngfix.c and revised it + to check all compressed chunks known to libpng. + +Version 1.6.3beta10 [July 5, 2013] + Updated documentation to show default behavior of benign errors correctly. + Only compile ARM code when PNG_READ_SUPPORTED is defined. + Fixed undefined behavior in contrib/tools/pngfix.c and added new strip + option. pngfix relied on undefined behavior and even a simple change from + gcc to g++ caused it to fail. The new strip option 'unsafe' has been + implemented and is the default if --max is given. Option names have + been clarified, with --strip=transform now stripping the bKGD chunk, + which was stripped previously with --strip=unused. + Added all documented chunk types to pngpriv.h + Unified pngfix.c source with libpng17. + +Version 1.6.3rc01 [July 11, 2013] + No changes. + +Version 1.6.3 [July 18, 2013] + Revised manual about changes in iTXt chunk handling made in libpng-1.6.0. + Added "/* SAFE */" comments in pngrutil.c and pngrtran.c where warnings + may be erroneously issued by code-checking applications. + +Version 1.6.4beta01 [August 21, 2013] + Added information about png_set_options() to the manual. + Delay calling png_init_filter_functions() until a row with nonzero filter + is found. + +Version 1.6.4beta02 [August 30, 2013] + Fixed inconsistent conditional compilation of png_chunk_unknown_handling() + prototype, definition, and usage. Made it depend on + PNG_HANDLE_AS_UNKNOWN_SUPPORTED everywhere. + +Version 1.6.4rc01 [September 5, 2013] + No changes. + +Version 1.6.4 [September 12, 2013] + No changes. + +Version 1.6.5 [September 14, 2013] + Removed two stray lines of code from arm/arm_init.c. + +Version 1.6.6 [September 16, 2013] + Removed two stray lines of code from arm/arm_init.c, again. + +Version 1.6.7beta01 [September 30, 2013] + Revised unknown chunk code to correct several bugs in the NO_SAVE_/NO_WRITE + combination + Allow HANDLE_AS_UNKNOWN to work when other options are configured off. Also + fixed the pngminim makefiles to work when $(MAKEFLAGS) contains stuff + which terminates the make options (as by default in recent versions of + Gentoo). + Avoid up-cast warnings in pngvalid.c. On ARM the alignment requirements of + png_modifier are greater than that of png_store and as a consequence + compilation of pngvalid.c results in a warning about increased alignment + requirements because of the bare cast to (png_modifier*). The code is safe, + because the pointer is known to point to a stack allocated png_modifier, + but this change avoids the warning. + Fixed default behavior of ARM_NEON_API. If the ARM NEON API option was + compiled without the CHECK option it defaulted to on, not off. + Check user callback behavior in pngunknown.c. Previous versions compiled + if SAVE_UNKNOWN was not available but did nothing since the callback + was never implemented. + Merged pngunknown.c with 1.7 version and back ported 1.7 improvements/fixes + +Version 1.6.7beta02 [October 12, 2013] + Made changes for compatibility with automake 1.14: + 1) Added the 'compile' program to the list of programs that must be cleaned + in autogen.sh + 2) Added 'subdir-objects' which causes .c files in sub-directories to be + compiled such that the corresponding .o files are also in the + sub-directory. This is because automake 1.14 warns that the + current behavior of compiling to the top level directory may be removed + in the future. + 3) Updated dependencies on pnglibconf.h to match the new .o locations and + added all the files in contrib/libtests and contrib/tools that depend + on pnglibconf.h + 4) Added 'BUILD_SOURCES = pnglibconf.h'; this is the automake recommended + way of handling the dependencies of sources that are machine generated; + unfortunately it only works if the user does 'make all' or 'make check', + so the dependencies (3) are still required. + Cleaned up (char*) casts of zlib messages. The latest version of the Intel C + compiler complains about casting a string literal as (char*), so copied the + treatment of z_const from the library code into pngfix.c + Simplified error message code in pngunknown. The simplification has the + useful side effect of avoiding a bogus warning generated by the latest + version of the Intel C compiler (it objects to + condition ? string-literal : string-literal). + Make autogen.sh work with automake 1.13 as well as 1.14. Do this by always + removing the 1.14 'compile' script but never checking for it. + +Version 1.6.7beta03 [October 19, 2013] + Added ARMv8 support (James Yu ). Added file + arm/filter_neon_intrinsics.c; enable with -mfpu=neon. + Revised pngvalid to generate size images with as many filters as it can + manage, limited by the number of rows. + Cleaned up ARM NEON compilation handling. The tests are now in pngpriv.h + and detect the broken GCC compilers. + +Version 1.6.7beta04 [October 26, 2013] + Allow clang derived from older GCC versions to use ARM intrinsics. This + causes all clang builds that use -mfpu=neon to use the intrinsics code, + not the assembler code. This has only been tested on iOS 7. It may be + necessary to exclude some earlier clang versions but this seems unlikely. + Changed NEON implementation selection mechanism. This allows assembler + or intrinsics to be turned on at compile time during the build by defining + PNG_ARM_NEON_IMPLEMENTATION to the correct value (2 or 1). This macro + is undefined by default and the build type is selected in pngpriv.h. + +Version 1.6.7rc01 [November 2, 2013] + No changes. + +Version 1.6.7rc02 [November 7, 2013] + Fixed #include in filter_neon_intrinsics.c and ctype macros. The ctype char + checking macros take an unsigned char argument, not a signed char. + +Version 1.6.7 [November 14, 2013] + No changes. + +Version 1.6.8beta01 [November 24, 2013] + Moved prototype for png_handle_unknown() in pngpriv.h outside of + the #ifdef PNG_SET_UNKNOWN_CHUNKS_SUPPORTED/#endif block. + Added "-Wall" to CFLAGS in contrib/pngminim/*/makefile + Conditionally compile some unused functions reported by -Wall in + pngminim. + Fixed 'minimal' builds. Various obviously useful minimal configurations + don't build because of missing contrib/libtests test programs and + overly complex dependencies in scripts/pnglibconf.dfa. This change + adds contrib/conftest/*.dfa files that can be used in automatic build + scripts to ensure that these configurations continue to build. + Enabled WRITE_INVERT and WRITE_PACK in contrib/pngminim/encoder. + Fixed pngvalid 'fail' function declaration on the Intel C Compiler. + This reverts to the previous 'static' implementation and works round + the 'unused static function' warning by using PNG_UNUSED(). + +Version 1.6.8beta02 [November 30, 2013] + Removed or marked PNG_UNUSED some harmless "dead assignments" reported + by clang scan-build. + Changed tabs to 3 spaces in png_debug macros and changed '"%s"m' + to '"%s" m' to improve portability among compilers. + Changed png_free_default() to free() in pngtest.c + +Version 1.6.8rc01 [December 12, 2013] + Tidied up pngfix inits and fixed pngtest no-write builds. + +Version 1.6.8rc02 [December 14, 2013] + Handle zero-length PLTE chunk or NULL palette with png_error() + instead of png_chunk_report(), which by default issues a warning + rather than an error, leading to later reading from a NULL pointer + (png_ptr->palette) in png_do_expand_palette(). This is CVE-2013-6954 + and VU#650142. Libpng-1.6.1 through 1.6.7 are vulnerable. + Libpng-1.6.0 and earlier do not have this bug. + +Version 1.6.8 [December 19, 2013] + No changes. + +Version 1.6.9beta01 [December 26, 2013] + Bookkeeping: Moved functions around (no changes). Moved transform + function definitions before the place where they are called so that + they can be made static. Move the intrapixel functions and the + grayscale palette builder out of the png?tran.c files. The latter + isn't a transform function and is no longer used internally, and the + former MNG specific functions are better placed in pngread/pngwrite.c + Made transform implementation functions static. This makes the internal + functions called by png_do_{read|write}_transformations static. On an + x86-64 DLL build (Gentoo Linux) this reduces the size of the text + segment of the DLL by 1208 bytes, about 0.6%. It also simplifies + maintenance by removing the declarations from pngpriv.h and allowing + easier changes to the internal interfaces. + Rebuilt configure scripts with automake-1.14.1 and autoconf-2.69 + in the tar distributions. + +Version 1.6.9beta02 [January 1, 2014] + Added checks for libpng 1.5 to pngvalid.c. This supports the use of + this version of pngvalid in libpng 1.5 + Merged with pngvalid.c from libpng-1.7 changes to create a single + pngvalid.c + Removed #error macro from contrib/tools/pngfix.c (Thomas Klausner). + Merged pngrio.c, pngtrans.c, pngwio.c, and pngerror.c with libpng-1.7.0 + Merged libpng-1.7.0 changes to make no-interlace configurations work + with test programs. + Revised pngvalid.c to support libpng 1.5, which does not support the + PNG_MAXIMUM_INFLATE_WINDOW option, so #define it out when appropriate in + pngvalid.c + Allow unversioned links created on install to be disabled in configure. + In configure builds 'make install' changes/adds links like png.h + and libpng.a to point to the newly installed, versioned, files (e.g. + libpng17/png.h and libpng17.a). Three new configure options and some + rearrangement of Makefile.am allow creation of these links to be disabled. + +Version 1.6.9beta03 [January 10, 2014] + Removed potentially misleading warning from png_check_IHDR(). + +Version 1.6.9beta04 [January 20, 2014] + Updated scripts/makefile.* to use CPPFLAGS (Cosmin). + Added clang attribute support (Cosmin). + +Version 1.6.9rc01 [January 28, 2014] + No changes. + +Version 1.6.9rc02 [January 30, 2014] + Quiet an uninitialized memory warning from VC2013 in png_get_png(). + +Version 1.6.9 [February 6, 2014] + +Version 1.6.10beta01 [February 9, 2014] + Backported changes from libpng-1.7.0beta30 and beta31: + Fixed a large number of instances where PNGCBAPI was omitted from + function definitions. + Added pngimage test program for png_read_png() and png_write_png() + with two new test scripts. + Removed dependence on !PNG_READ_EXPAND_SUPPORTED for calling + png_set_packing() in png_read_png(). + Fixed combination of ~alpha with shift. On read invert alpha, processing + occurred after shift processing, which causes the final values to be + outside the range that should be produced by the shift. Reversing the + order on read makes the two transforms work together correctly and mirrors + the order used on write. + Do not read invalid sBIT chunks. Previously libpng only checked sBIT + values on write, so a malicious PNG writer could therefore cause + the read code to return an invalid sBIT chunk, which might lead to + application errors or crashes. Such chunks are now skipped (with + chunk_benign_error). + Make png_read_png() and png_write_png() prototypes in png.h depend + upon PNG_READ_SUPPORTED and PNG_WRITE_SUPPORTED. + Support builds with unsupported PNG_TRANSFORM_* values. All of the + PNG_TRANSFORM_* values are always defined in png.h and, because they + are used for both read and write in some cases, it is not reliable + to #if out ones that are totally unsupported. This change adds error + detection in png_read_image() and png_write_image() to do a + png_app_error() if the app requests something that cannot be done + and it adds corresponding code to pngimage.c to handle such options + by not attempting to test them. + +Version 1.6.10beta02 [February 23, 2014] + Moved redefines of png_error(), png_warning(), png_chunk_error(), + and png_chunk_warning() from pngpriv.h to png.h to make them visible + to libpng-calling applications. + Moved OS dependent code from arm/arm_init.c, to allow the included + implementation of the ARM NEON discovery function to be set at + build-time and provide sample implementations from the current code in the + contrib/arm-neon subdirectory. The __linux__ code has also been changed to + compile and link on Android by using /proc/cpuinfo, and the old linux code + is in contrib/arm-neon/linux-auxv.c. The new code avoids POSIX and Linux + dependencies apart from opening /proc/cpuinfo and is C90 compliant. + Check for info_ptr == NULL early in png_read_end() so we don't need to + run all the png_handle_*() and depend on them to return if info_ptr == NULL. + This improves the performance of png_read_end(png_ptr, NULL) and makes + it more robust against future programming errors. + Check for __has_extension before using it in pngconf.h, to + support older Clang versions (Jeremy Sequoia). + Treat CRC error handling with png_set_crc_action(), instead of with + png_set_benign_errors(), which has been the case since libpng-1.6.0beta18. + Use a user warning handler in contrib/gregbook/readpng2.c instead of default, + so warnings will be put on stderr even if libpng has CONSOLE_IO disabled. + Added png_ptr->process_mode = PNG_READ_IDAT_MODE in png_push_read_chunk + after recognizing the IDAT chunk, which avoids an infinite loop while + reading a datastream whose first IDAT chunk is of zero-length. + This fixes CERT VU#684412 and CVE-2014-0333. + Don't recognize known sRGB profiles as sRGB if they have been hacked, + but don't reject them and don't issue a copyright violation warning. + +Version 1.6.10beta03 [February 25, 2014] + Moved some documentation from png.h to libpng.3 and libpng-manual.txt + Minor editing of contrib/arm-neon/README and contrib/examples/*.c + +Version 1.6.10rc01 [February 27, 2014] + Fixed typos in the manual and in scripts/pnglibconf.dfa (CFLAGS -> CPPFLAGS + and PNG_USR_CONFIG -> PNG_USER_CONFIG). + +Version 1.6.10rc02 [February 28, 2014] + Removed unreachable return statement after png_chunk_error() + in pngrutil.c + +Version 1.6.10rc03 [March 4, 2014] + Un-deprecated png_data_freer(). + +Version 1.6.10 [March 6, 2014] + No changes. + +Version 1.6.11beta01 [March 17, 2014] + Use "if (value != 0)" instead of "if (value)" consistently. + Changed ZlibSrcDir from 1.2.5 to 1.2.8 in projects/vstudio. + Moved configuration information from the manual to the INSTALL file. + +Version 1.6.11beta02 [April 6, 2014] + Removed #if/#else/#endif from inside two pow() calls in pngvalid.c because + they were handled improperly by Portland Group's PGI-14.1 - PGI-14.3 + when using its "__builtin_pow()" function. + Silence 'unused parameter' build warnings (Cosmin Truta). + $(CP) is now used alongside $(RM_F). Also, use 'copy' instead of 'cp' + where applicable, and applied other minor makefile changes (Cosmin). + Don't warn about invalid dimensions exceeding user limits (Cosmin). + Allow an easy replacement of the default pre-built configuration + header with a custom header, via the make PNGLIBCONF_H_PREBUILT + macro (Cosmin). + +Version 1.6.11beta03 [April 6, 2014] + Fixed a typo in pngrutil.c, introduced in libpng-1.5.6, that interferes + with "blocky" expansion of sub-8-bit interlaced PNG files (Eric Huss). + Optionally use __builtin_bswap16() in png_do_swap(). + +Version 1.6.11beta04 [April 19, 2014] + Made progressive reading of interlaced images consistent with the + behavior of the sequential reader and consistent with the manual, by + moving some code out of the PNG_READ_INTERLACING_SUPPORTED blocks. The + row_callback now receives the proper pass number and unexpanded rows, when + png_combine_row() isn't built or used, and png_set_interlace_handling() + is not called. + Allow PNG_sRGB_PROFILE_CHECKING = (-1) to mean no sRGB profile checking. + +Version 1.6.11beta05 [April 26, 2014] + Do not reject ICC V2 profiles that lack padding (Kai-Uwe Behrmann). + Relocated closing bracket of the sRGB profile test loop to avoid getting + "Not recognizing known sRGB profile that has been edited" warning for + ICC V2 profiles that lack the MD5 signature in the profile header. + +Version 1.6.11beta06 [May 19, 2014] + Added PNG_SKIP_sRGB_CHECK_PROFILE choice for png_set_option(). + +Version 1.6.11rc01 [May 27, 2014] + No changes. + +Version 1.6.11rc02 [June 3, 2014] + Test ZLIB_VERNUM instead of PNG_ZLIB_VERNUM in contrib/tools/pngfix.c + +Version 1.6.11 [June 5, 2014] + No changes. + +Version 1.6.12rc01 [June 6, 2014] + Relocated new code from 1.6.11beta06 in png.c to a point after the + declarations (Max Stepin). + +Version 1.6.12rc02 [June 7, 2014] + Changed file permissions of contrib/tools/intgamma.sh, + test-driver, and compile from 0644 to 0755 (Cosmin). + +Version 1.6.12rc03 [June 8, 2014] + Ensure "__has_attribute()" macro exists before trying to use it with + old clang compilers (MacPorts Ticket #43939). + +Version 1.6.12 [June 12, 2014] + No changes. + +Version 1.6.13beta01 [July 4, 2014] + Quieted -Wsign-compare and -Wclobber compiler warnings in + contrib/pngminus/*.c + Added "(void) png_ptr;" where needed in contrib/gregbook to quiet + compiler complaints about unused pointers. + Split a long output string in contrib/gregbook/rpng2-x.c. + Added "PNG_SET_OPTION" requirement for sRGB chunk support to pnglibconf.dfa, + Needed for write-only support (John Bowler). + Changed "if defined(__ARM_NEON__)" to + "if (defined(__ARM_NEON__) || defined(__ARM_NEON))" (James Wu). + Fixed clang no-warning builds: png_digit was defined but never used. + +Version 1.6.13beta02 [July 21, 2014] + Fixed an incorrect separator ("/" should be "\") in scripts/makefile.vcwin32 + (bug report from Wolfgang S. Kechel). Bug was introduced in libpng-1.6.11. + Also fixed makefile.bc32, makefile.bor, makefile.msc, makefile.intel, and + makefile.tc3 similarly. + +Version 1.6.13beta03 [August 3, 2014] + Removed scripts/makefile.elf. It has not worked since libpng-1.5.0beta14 + due to elimination of the PNG_FUNCTION_EXPORT and PNG_DATA_EXPORT + definitions from pngconf.h. + Ensure that CMakeLists.txt makes the target "lib" directory before making + symbolic link into it (SourceForge bug report #226 by Rolf Timmermans). + +Version 1.6.13beta04 [August 8, 2014] + Added opinion that the ECCN (Export Control Classification Number) for + libpng is EAR99 to the README file. + Eliminated use of "$<" in makefile explicit rules, when copying + $PNGLIBCONF_H_PREBUILT. This does not work on some versions of make; + bug introduced in libpng version 1.6.11. + +Version 1.6.13rc01 [August 14, 2014] + Made "ccopts" agree with "CFLAGS" in scripts/makefile.hp* and makefile.*sunu + +Version 1.6.13 [August 21, 2014] + No changes. + +Version 1.6.14beta01 [September 14, 2014] + Guard usage of png_ptr->options with #ifdef PNG_SET_OPTION_SUPPORTED. + Do not build contrib/tools/pngfix.c when PNG_SETJMP_NOT_SUPPORTED, + to allow "make" to complete without setjmp support (bug report by + Claudio Fontana) + Add "#include " to contrib/tools/pngfix.c (John Bowler) + +Version 1.6.14beta02 [September 18, 2014] + Use nanosleep() instead of usleep() in contrib/gregbook/rpng2-x.c + because usleep() is deprecated. + Define usleep() in contrib/gregbook/rpng2-x.c if not already defined + in unistd.h and nanosleep() is not available; fixes error introduced + in libpng-1.6.13. + Disable floating point exception handling in pngvalid.c when + PNG_FLOATING_ARITHMETIC is not supported (bug report by "zootus + at users.sourceforge.net"). + +Version 1.6.14beta03 [September 19, 2014] + Define FE_DIVBYZERO, FE_INVALID, and FE_OVERFLOW in pngvalid.c if not + already defined. Revert floating point exception handling in pngvalid.c + to version 1.6.14beta01 behavior. + +Version 1.6.14beta04 [September 27, 2014] + Fixed incorrect handling of the iTXt compression flag in pngrutil.c + (bug report by Shunsaku Hirata). Bug was introduced in libpng-1.6.0. + +Version 1.6.14beta05 [October 1, 2014] + Added "option READ_iCCP enables READ_COMPRESSED_TEXT" to pnglibconf.dfa + +Version 1.6.14beta06 [October 5, 2014] + Removed unused "text_len" parameter from private function png_write_zTXt(). + Conditionally compile some code in png_deflate_claim(), when + PNG_WARNINGS_SUPPORTED and PNG_ERROR_TEXT_SUPPORTED are disabled. + Replaced repeated code in pngpread.c with PNG_PUSH_SAVE_BUFFER_IF_FULL. + Added "chunk iTXt enables TEXT" and "chunk zTXt enables TEXT" + to pnglibconf.dfa. + Removed "option READ_COMPRESSED_TEXT enables READ_TEXT" from pnglibconf.dfa, + to make it possible to configure a libpng that supports iCCP but not TEXT. + +Version 1.6.14beta07 [October 7, 2014] + Removed "option WRITE_COMPRESSED_TEXT enables WRITE_TEXT" from pnglibconf.dfa + Only mark text chunks as written after successfully writing them. + +Version 1.6.14rc01 [October 15, 2014] + Fixed some typos in comments. + +Version 1.6.14rc02 [October 17, 2014] + Changed png_convert_to_rfc_1123() to png_convert_to_rfc_1123_buffer() + in the manual, to reflect the change made in libpng-1.6.0. + Updated README file to explain that direct access to the png_struct + and info_struct members has not been permitted since libpng-1.5.0. + +Version 1.6.14 [October 23, 2014] + No changes. + +Version 1.6.15beta01 [October 29, 2014] + Changed "if (!x)" to "if (x == 0)" and "if (x)" to "if (x != 0)" + Simplified png_free_data(). + Added missing "ptr = NULL" after some instances of png_free(). + +Version 1.6.15beta02 [November 1, 2014] + Changed remaining "if (!x)" to "if (x == 0)" and "if (x)" to "if (x != 0)" + +Version 1.6.15beta03 [November 3, 2014] + Added PNG_USE_ARM_NEON configuration flag (Marcin Juszkiewicz). + +Version 1.6.15beta04 [November 4, 2014] + Removed new PNG_USE_ARM_NEON configuration flag and made a one-line + revision to configure.ac to support ARM on aarch64 instead (John Bowler). + +Version 1.6.15beta05 [November 5, 2014] + Use png_get_libpng_ver(NULL) instead of PNG_LIBPNG_VER_STRING in + example.c, pngtest.c, and applications in the contrib directory. + Fixed an out-of-range read in png_user_version_check() (Bug report from + Qixue Xiao, CVE-2015-8540). + Simplified and future-proofed png_user_version_check(). + Fixed GCC unsigned int->float warnings. Various versions of GCC + seem to generate warnings when an unsigned value is implicitly + converted to double. This is probably a GCC bug but this change + avoids the issue by explicitly converting to (int) where safe. + Free all allocated memory in pngimage. The file buffer cache was left + allocated at the end of the program, harmless but it causes memory + leak reports from clang. + Fixed array size calculations to avoid warnings. At various points + in the code the number of elements in an array is calculated using + sizeof. This generates a compile time constant of type (size_t) which + is then typically assigned to an (unsigned int) or (int). Some versions + of GCC on 64-bit systems warn about the apparent narrowing, even though + the same compiler does apparently generate the correct, in-range, + numeric constant. This adds appropriate, safe, casts to make the + warnings go away. + +Version 1.6.15beta06 [November 6, 2014] + Reverted use png_get_libpng_ver(NULL) instead of PNG_LIBPNG_VER_STRING + in the manual, example.c, pngtest.c, and applications in the contrib + directory. It was incorrect advice. + +Version 1.6.15beta07 [November 7, 2014] + Removed #ifdef PNG_16BIT_SUPPORTED/#endif around png_product2(); it is + needed by png_reciprocal2(). + Added #ifdef PNG_16BIT_SUPPORTED/#endif around png_log16bit() and + png_do_swap(). + Changed all "#endif /* PNG_FEATURE_SUPPORTED */" to "#endif /* FEATURE */" + +Version 1.6.15beta08 [November 8, 2014] + More housecleaning in *.h + +Version 1.6.15rc01 [November 13, 2014] + +Version 1.6.15rc02 [November 14, 2014] + The macros passed in the command line to Borland make were ignored if + similarly-named macros were already defined in makefiles. This behavior + is different from POSIX make and other make programs. Surround the + macro definitions with ifndef guards (Cosmin). + +Version 1.6.15rc03 [November 16, 2014] + Added "-D_CRT_SECURE_NO_WARNINGS" to CFLAGS in scripts/makefile.vcwin32. + Removed the obsolete $ARCH variable from scripts/makefile.darwin. + +Version 1.6.15 [November 20, 2014] + No changes. + +Version 1.6.16beta01 [December 14, 2014] + Added ".align 2" to arm/filter_neon.S to support old GAS assemblers that + don't do alignment correctly. + Revised Makefile.am and scripts/symbols.dfn to work with MinGW/MSYS + (Bob Friesenhahn). + +Version 1.6.16beta02 [December 15, 2014] + Revised Makefile.am and scripts/*.dfn again to work with MinGW/MSYS; + renamed scripts/*.dfn to scripts/*.c (John Bowler). + +Version 1.6.16beta03 [December 21, 2014] + Quiet a "comparison always true" warning in pngstest.c (John Bowler). + +Version 1.6.16rc01 [December 21, 2014] + Restored a test on width that was removed from png.c at libpng-1.6.9 + (Bug report by Alex Eubanks, CVE-2015-0973). + +Version 1.6.16rc02 [December 21, 2014] + Undid the update to pngrutil.c in 1.6.16rc01. + +Version 1.6.16rc03 [December 21, 2014] + Fixed an overflow in png_combine_row() with very wide interlaced images + (Bug report and fix by John Bowler, CVE-2014-9495). + +Version 1.6.16 [December 22, 2014] + No changes. + +Version 1.6.17beta01 [January 29, 2015] + Removed duplicate PNG_SAFE_LIMITS_SUPPORTED handling from pngconf.h + Corrected the width limit calculation in png_check_IHDR(). + Removed user limits from pngfix. Also pass NULL pointers to + png_read_row to skip the unnecessary row de-interlace stuff. + Added testing of png_set_packing() to pngvalid.c + Regenerated configure scripts in the *.tar distributions with libtool-2.4.4 + Implement previously untested cases of libpng transforms in pngvalid.c + Fixed byte order in png_do_read_filler() with 16-bit input. Previously + the high and low bytes of the filler, from png_set_filler() or from + png_set_add_alpha(), were read in the wrong order. + Made the check for out-of-range values in png_set_tRNS() detect + values that are exactly 2^bit_depth, and work on 16-bit platforms. + Merged some parts of libpng-1.6.17beta01 and libpng-1.7.0beta47. + Added #ifndef __COVERITY__ where needed in png.c, pngrutil.c and + pngset.c to avoid warnings about dead code. + Added "& 0xff" to many instances of expressions that are typecast + to (png_byte), to avoid Coverity warnings. + +Version 1.6.17beta02 [February 7, 2015] + Work around one more Coverity-scan dead-code warning. + Do not build png_product2() when it is unused. + +Version 1.6.17beta03 [February 17, 2015] + Display user limits in the output from pngtest. + Eliminated the PNG_SAFE_LIMITS macro and restored the 1-million-column + and 1-million-row default limits in pnglibconf.dfa, that can be reset + by the user at build time or run time. This provides a more robust + defense against DOS and as-yet undiscovered overflows. + +Version 1.6.17beta04 [February 21, 2015] + Added PNG_WRITE_CUSTOMIZE_COMPRESSION_SUPPORTED macro, on by default. + Allow user to call png_get_IHDR() with NULL arguments (Reuben Hawkins). + Rebuilt configure scripts with automake-1.15 and libtool-2.4.6 + +Version 1.6.17beta05 [February 25, 2015] + Restored compiling of png_reciprocal2 with PNG_NO_16BIT. + +Version 1.6.17beta06 [February 27, 2015] + Moved png_set_filter() prototype into a PNG_WRITE_SUPPORTED block + of png.h. + Avoid runtime checks when converting integer to png_byte with + Visual Studio (Sergey Kosarevsky) + +Version 1.6.17rc01 [March 4, 2015] + No changes. + +Version 1.6.17rc02 [March 9, 2015] + Removed some comments that the configure script did not handle + properly from scripts/pnglibconf.dfa and pnglibconf.h.prebuilt. + Free the unknown_chunks structure even when it contains no data. + +Version 1.6.17rc03 [March 12, 2015] + Updated CMakeLists.txt to add OSX framework, change YES/NO to ON/OFF + for consistency, and remove some useless tests (Alexey Petruchik). + +Version 1.6.17rc04 [March 16, 2015] + Remove pnglibconf.h, pnglibconf.c, and pnglibconf.out instead of + pnglibconf.* in "make clean" (Cosmin). + Fix bug in calculation of maxbits, in png_write_sBIT, introduced + in libpng-1.6.17beta01 (John Bowler). + +Version 1.6.17rc05 [March 21, 2015] + Define PNG_FILTER_* and PNG_FILTER_VALUE_* in png.h even when WRITE + is not supported (John Bowler). This fixes an error introduced in + libpng-1.6.17beta06. + Reverted "& 0xff" additions of version 1.6.17beta01. Libpng passes + the Coverity scan without them. + +Version 1.6.17rc06 [March 23, 2015] + Remove pnglibconf.dfn and pnglibconf.pre with "make clean". + Reformatted some "&0xff" instances to "& 0xff". + Fixed simplified 8-bit-linear to sRGB alpha. The calculated alpha + value was wrong. It's not clear if this affected the final stored + value; in the obvious code path the upper and lower 8-bits of the + alpha value were identical and the alpha was truncated to 8-bits + rather than dividing by 257 (John Bowler). + +Version 1.6.17 [March 26, 2015] + No changes. + +Version 1.6.18beta01 [April 1, 2015] + Removed PNG_SET_CHUNK_[CACHE|MALLOC]_LIMIT_SUPPORTED macros. They + have been combined with PNG_SET_USER_LIMITS_SUPPORTED (resolves + bug report by Andrew Church). + Fixed rgb_to_gray checks and added tRNS checks to pngvalid.c. This + fixes some arithmetic errors that caused some tests to fail on + some 32-bit platforms (Bug reports by Peter Breitenlohner [i686] + and Petr Gajdos [i586]). + +Version 1.6.18beta02 [April 26, 2015] + Suppressed some warnings from the Borland C++ 5.5.1/5.82 compiler + (Bug report by Viktor Szakats). + +Version 1.6.18beta03 [May 6, 2015] + Replaced "unexpected" with an integer (0xabadca11) in pngset.c + where a long was expected, to avoid a compiler warning when PNG_DEBUG > 1. + Added contrib/examples/simpleover.c, to demonstrate how to handle + alpha compositing of multiple images, using the "simplified API" + and an example PNG generation tool, contrib/examples/genpng.c + (John Bowler). + +Version 1.6.18beta04 [May 20, 2015] + PNG_RELEASE_BUILD replaces tests where the code depended on the build base + type and can be defined on the command line, allowing testing in beta + builds (John Bowler). + Avoid Coverity issue 80858 (REVERSE NULL) in pngtest.c PNG_DEBUG builds. + Avoid a harmless potential integer overflow in png_XYZ_from_xy() (Bug + report from Christopher Ferris). + +Version 1.6.18beta05 [May 31, 2015] + Backport filter selection code from libpng-1.7.0beta51, to combine + sub_row, up_row, avg_row, and paeth_row into try_row and tst_row. + Changed png_voidcast(), etc., to voidcast(), etc., in contrib/tools/pngfix.c + to avoid confusion with the libpng private macros. + Fixed old cut&paste bug in the weighted filter selection code in + pngwutil.c, introduced in libpng-0.95, March 1997. + +Version 1.6.18beta06 [June 1, 2015] + Removed WRITE_WEIGHTED_FILTERED code, to save a few kbytes of the + compiled library size. It never worked properly and as far as we can + tell, no one uses it. The png_set_filter_heuristics() and + png_set_filter_heuristics_fixed() APIs are retained but deprecated + and do nothing. + +Version 1.6.18beta07 [June 6, 2015] + Removed non-working progressive reader 'skip' function. This + function has apparently never been used. It was implemented + to support back-door modification of png_struct in libpng-1.4.x + but (because it does nothing and cannot do anything) was apparently + never tested (John Bowler). + Fixed cexcept.h in which GCC 5 now reports that one of the auto + variables in the Try macro needs to be volatile to prevent value + being lost over the setjmp (John Bowler). + Fixed NO_WRITE_FILTER and -Wconversion build breaks (John Bowler). + Fix g++ build breaks (John Bowler). + Quieted some Coverity issues in pngfix.c, png-fix-itxt.c, pngvalid.c, + pngstest.c, and pngimage.c. Most seem harmless, but png-fix-itxt + would only work with iTXt chunks with length 255 or less. + Added #ifdef's to contrib/examples programs so people don't try + to compile them without the minimum required support enabled + (suggested by Flavio Medeiros). + +Version 1.6.18beta08 [June 30, 2015] + Eliminated the final two Coverity defects (insecure temporary file + handling in contrib/libtests/pngstest.c; possible overflow of + unsigned char in contrib/tools/png-fix-itxt.c). To use the "secure" + file handling, define PNG_USE_MKSTEMP, otherwise "tmpfile()" will + be used. + Removed some unused WEIGHTED_FILTER macros from png.h and pngstruct.h + +Version 1.6.18beta09 [July 5, 2015] + Removed some useless typecasts from contrib/tools/png-fix-itxt.c + Fixed a new signed-unsigned comparison in pngrtran.c (Max Stepin). + Replaced arbitrary use of 'extern' with #define PNG_LINKAGE_*. To + preserve API compatibility, the new defines all default to "extern" + (requested by Jan Nijtmans). + +Version 1.6.18rc01 [July 9, 2015] + Belatedly added Mans Rullgard and James Yu to the list of Contributing + Authors. + +Version 1.6.18rc02 [July 12, 2015] + Restored unused FILTER_HEURISTIC macros removed at libpng-1.6.18beta08 + to png.h to avoid compatibility warnings. + +Version 1.6.18rc03 [July 15, 2015] + Minor changes to the man page + +Version 1.6.18 [July 23, 2015] + No changes. + +Version 1.6.19beta01 [July 30, 2015] + Updated obsolete information about the simplified API macros in the + manual pages (Bug report by Arc Riley). + Avoid potentially dereferencing NULL info_ptr in png_info_init_3(). + Rearranged png.h to put the major sections in the same order as + in libpng17. + Eliminated unused PNG_COST_SHIFT, PNG_WEIGHT_SHIFT, PNG_COST_FACTOR, and + PNG_WEIGHT_FACTOR macros. + Suppressed some warnings from the Borland C++ 5.5.1/5.82 compiler + (Bug report by Viktor Szakats). Several warnings remain and are + unavoidable, where we test for overflow. + Fixed potential leak of png_pixels in contrib/pngminus/pnm2png.c + Fixed uninitialized variable in contrib/gregbook/rpng2-x.c + +Version 1.6.19beta02 [August 19, 2015] + Moved config.h.in~ from the "libpng_autotools_files" list to the + "libpng_autotools_extra" list in autogen.sh because it was causing a + false positive for missing files (bug report by Robert C. Seacord). + Removed unreachable "break" statements in png.c, pngread.c, and pngrtran.c + to suppress clang warnings (Bug report by Viktor Szakats). + Fixed some bad links in the man page. + Changed "n bit" to "n-bit" in comments. + Added signed/unsigned 16-bit safety net. This removes the dubious + 0x8000 flag definitions on 16-bit systems. They aren't supported + yet the defs *probably* work, however it seems much safer to do this + and be advised if anyone, contrary to advice, is building libpng 1.6 + on a 16-bit system. It also adds back various switch default clauses + for GCC; GCC errors out if they are not present (with an appropriately + high level of warnings). + Safely convert num_bytes to a png_byte in png_set_sig_bytes() (Robert + Seacord). + Fixed the recently reported 1's complement security issue by replacing + the value that is illegal in the PNG spec, in both signed and unsigned + values, with 0. Illegal unsigned values (anything greater than or equal + to 0x80000000) can still pass through, but since these are not illegal + in ANSI-C (unlike 0x80000000 in the signed case) the checking that + occurs later can catch them (John Bowler). + +Version 1.6.19beta03 [September 26, 2015] + Fixed png_save_int_32 when int is not 2's complement (John Bowler). + Updated libpng16 with all the recent test changes from libpng17, + including changes to pngvalid.c to ensure that the original, + distributed, version of contrib/visupng/cexcept.h can be used + (John Bowler). + pngvalid contains the correction to the use of SAVE/STORE_ + UNKNOWN_CHUNKS; a bug revealed by changes in libpng 1.7. More + tests contain the --strict option to detect warnings and the + pngvalid-standard test has been corrected so that it does not + turn on progressive-read. There is a separate test which does + that. (John Bowler) + Also made some signed/unsigned fixes. + Make pngstest error limits version specific. Splitting the machine + generated error structs out to a file allows the values to be updated + without changing pngstest.c itself. Since libpng 1.6 and 1.7 have + slightly different error limits this simplifies maintenance. The + makepngs.sh script has also been updated to more accurately reflect + current problems in libpng 1.7 (John Bowler). + Incorporated new test PNG files into make check. tests/pngstest-* + are changed so that the new test files are divided into 8 groups by + gamma and alpha channel. These tests have considerably better code + and pixel-value coverage than contrib/pngsuite; however,coverage is + still incomplete (John Bowler). + Removed the '--strict' in 1.6 because of the double-gamma-correction + warning, updated pngstest-errors.h for the errors detected with the + new contrib/testspngs PNG test files (John Bowler). + +Version 1.6.19beta04 [October 15, 2015] + Worked around rgb-to-gray issues in libpng 1.6. The previous + attempts to ignore the errors in the code aren't quite enough to + deal with the 'channel selection' encoding added to libpng 1.7; abort. + pngvalid.c is changed to drop this encoding in prior versions. + Fixed 'pow' macros in pngvalid.c. It is legal for 'pow' to be a + macro, therefore the argument list cannot contain preprocessing + directives. Make sure pow is a function where this happens. This is + a minimal safe fix, the issue only arises in non-performance-critical + code (bug report by Curtis Leach, fix by John Bowler). + Added sPLT support to pngtest.c + +Version 1.6.19rc01 [October 23, 2015] + No changes. + +Version 1.6.19rc02 [October 31, 2015] + Prevent setting or writing over-length PLTE chunk (Cosmin Truta). + Silently truncate over-length PLTE chunk while reading. + Libpng incorrectly calculated the output rowbytes when the application + decreased either the number of channels or the bit depth (or both) in + a user transform. This was safe; libpng overallocated buffer space + (potentially by quite a lot; up to 4 times the amount required) but, + from 1.5.4 on, resulted in a png_error (John Bowler). + +Version 1.6.19rc03 [November 3, 2015] + Fixed some inconsequential cut-and-paste typos in png_set_cHRM_XYZ_fixed(). + Clarified COPYRIGHT information to state explicitly that versions + are derived from previous versions. + Removed much of the long list of previous versions from png.h and + libpng.3. + +Version 1.6.19rc04 [November 5, 2015] + Fixed new bug with CRC error after reading an over-length palette + (bug report by Cosmin Truta) (CVE-2015-8126). + +Version 1.6.19 [November 12, 2015] + Cleaned up coding style in png_handle_PLTE(). + +Version 1.6.20beta01 [November 20, 2015] + Avoid potential pointer overflow/underflow in png_handle_sPLT() and + png_handle_pCAL() (Bug report by John Regehr). + +Version 1.6.20beta02 [November 23, 2015] + Fixed incorrect implementation of png_set_PLTE() that uses png_ptr + not info_ptr, that left png_set_PLTE() open to the CVE-2015-8126 + vulnerability. Fixes CVE-2015-8472. + +Version 1.6.20beta03 [November 24, 2015] + Backported tests from libpng-1.7.0beta69. + +Version 1.6.20rc01 [November 26, 2015] + Fixed an error in handling of bad zlib CMINFO field in pngfix, found by + American Fuzzy Lop, reported by Brian Carpenter. inflate() doesn't + immediately fault a bad CMINFO field; instead a 'too far back' error + happens later (at least some times). pngfix failed to limit CMINFO to + the allowed values but then assumed that window_bits was in range, + triggering an assert. The bug is mostly harmless; the PNG file cannot + be fixed. + +Version 1.6.20rc02 [November 29, 2015] + In libpng 1.6 zlib initialization was changed to use the window size + in the zlib stream, not a fixed value. This causes some invalid images, + where CINFO is too large, to display 'correctly' if the rest of the + data is valid. This provides a workaround for zlib versions where the + error arises (ones that support the API change to use the window size + in the stream). + +Version 1.6.20 [December 3, 2015] + No changes. + +Version 1.6.21beta01 [December 11, 2015] + Fixed syntax "$(command)" in tests/pngstest that some shells other than + bash could not parse (Bug report by Nelson Beebe). Use `command` instead. + +Version 1.6.21beta02 [December 14, 2015] + Moved png_check_keyword() from pngwutil.c to pngset.c + Removed LE/BE dependencies in pngvalid, to 'fix' the current problem + in the BigEndian tests by not testing it, making the BE code the same + as the LE version. + Fixes to pngvalid for various reduced build configurations (eliminate unused + statics) and a fix for the case in rgb_to_gray when the digitize option + reduces graylo to 0, producing a large error. + +Version 1.6.21beta03 [December 18, 2015] + Widened the 'limit' check on the internally calculated error limits in + the 'DIGITIZE' case (the code used prior to 1.7 for rgb_to_gray error + checks) and changed the check to only operate in non-release builds + (base build type not RC or RELEASE.) + Fixed undefined behavior in pngvalid.c, undefined because + (png_byte) << shift is undefined if it changes the signed bit + (because png_byte is promoted to int). The libpng exported functions + png_get_uint_32 and png_get_uint_16 handle this. (Bug reported by + David Drysdale as a result of reports from UBSAN in clang 3.8). + This changes pngvalid to use BE random numbers; this used to produce + errors but these should not be fixed as a result of the previous changes. + +Version 1.6.21rc01 [January 4, 2016] + In projects/vstudio, combined readme.txt and WARNING into README.txt + +Version 1.6.21rc02 [January 7, 2016] + Relocated assert() in contrib/tools/pngfix.c, bug found by American + Fuzzy Lop, reported by Brian Carpenter. + Marked 'limit' UNUSED in transform_range_check(). This only affects + release builds. + +Version 1.6.21 [January 15, 2016] + Worked around a false-positive Coverity issue in pngvalid.c. + +Version 1.6.22beta01 [January 23, 2016] + Changed PNG_USE_MKSTEMP to __COVERITY__ to select alternate + "tmpfile()" implementation in contrib/libtests/pngstest.c + Fixed NO_STDIO build of pngunknown.c to skip calling png_init_io() + if there is no stdio.h support. + Added a png_image_write_to_memory() API and a number of assist macros + to allow an application that uses the simplified API write to bypass + stdio and write directly to memory. + Added some warnings (png.h) and some check code to detect *possible* + overflow in the ROW_STRIDE and simplified image SIZE macros. This + disallows image width/height/format that *might* overflow. This is + a quiet API change that limits in-memory image size (uncompressed) to + less than 4GByte and image row size (stride) to less than 2GByte. + Revised workaround for false-positive Coverity issue in pngvalid.c. + +Version 1.6.22beta02 [February 8, 2016] + Only use exit(77) in configure builds. + Corrected error in PNG_IMAGE_PNG_SIZE_MAX. This new macro underreported + the palette size because it failed to take into account that the memory + palette has to be expanded to full RGB when it is written to PNG. + Updated CMakeLists.txt, added supporting scripts/gen*.cmake.in + and test.cmake.in (Roger Leigh). + Relaxed limit checks on gamma values in pngrtran.c. As suggested in + the comments gamma values outside the range currently permitted + by png_set_alpha_mode are useful for HDR data encoding. These values + are already permitted by png_set_gamma so it is reasonable caution to + extend the png_set_alpha_mode range as HDR imaging systems are starting + to emerge. + +Version 1.6.22beta03 [March 9, 2016] + Added a common-law trademark notice and export control information + to the LICENSE file, png.h, and the man page. + Restored "& 0xff" in png_save_uint_16() and png_save_uint_32() that + were accidentally removed from libpng-1.6.17. + Changed PNG_INFO_cHNK and PNG_FREE_cHNK from 0xnnnn to 0xnnnnU in png.h + (Robert C. Seacord). + Removed dubious "#if INT_MAX" test from png.h that was added to + libpng-1.6.19beta02 (John Bowler). + Add ${INCLUDES} in scripts/genout.cmake.in (Bug report by Nixon Kwok). + Updated LICENSE to say files in the contrib directory are not + necessarily under the libpng license, and that some makefiles have + other copyright owners. + Added INTEL-SSE2 support (Mike Klein and Matt Sarett, Google, Inc.). + Made contrib/libtests/timepng more robust. The code no longer gives + up/fails on invalid PNG data, it just skips it (with error messages). + The code no longer fails on PNG files with data beyond IEND. Options + exist to use png_read_png (reading the whole image, not by row) and, in + that case, to apply any of the supported transforms. This makes for + more realistic testing; the decoded data actually gets used in a + meaningful fashion (John Bowler). + Fixed some misleading indentation (Krishnaraj Bhat). + +Version 1.6.22beta04 [April 5, 2016] + Force GCC compilation to C89 if needed (Dagobert Michelsen). + SSE filter speed improvements for bpp=3: + memcpy-free implementations of load3() / store3(). + call load3() only when needed at the end of a scanline. + +Version 1.6.22beta05 [April 27, 2016] + Added PNG_FAST_FILTERS macro (defined as + PNG_FILTER_NONE|PNG_FILTER_SUB|PNG_FILTER_UP). + Various fixes for contrib/libtests/timepng.c + Moved INTEL-SSE code from pngpriv.h into contrib/intel/intel_sse.patch. + Fixed typo (missing underscore) in #define PNG_READ_16_TO_8_SUPPORTED + (Bug report by Y.Ohashik). + +Version 1.6.22beta06 [May 5, 2016] + Rebased contrib/intel_sse.patch. + Quieted two Coverity issues in contrib/libtests/timepng.c. + Fixed issues with scripts/genout.cmake.in (David Capello, Nixon Kwok): + Added support to use multiple directories in ZLIBINCDIR variable, + Fixed CMAKE_C_FLAGS with multiple values when genout is compiled on MSVC, + Fixed pnglibconf.c compilation on OS X including the sysroot path. + +Version 1.6.22rc01 [May 14, 2016] + No changes. + +Version 1.6.22rc02 [May 16, 2016] + Removed contrib/timepng from default build; it does not build on platforms + that don't supply clock_gettime(). + +Version 1.6.22rc03 [May 17, 2016] + Restored contrib/timepng to default build but check for the presence + of clock_gettime() in configure.ac and Makefile.am. + +Version 1.6.22 [May 26, 2016] + No changes. + +Version 1.6.23beta01 [May 29, 2016] + Stop a potential memory leak in png_set_tRNS() (Bug report by Ted Ying). + Fixed the progressive reader to handle empty first IDAT chunk properly + (patch by Timothy Nikkel). This bug was introduced in libpng-1.6.0 and + only affected the libpng16 branch. + Added tests in pngvalid.c to check zero-length IDAT chunks in various + positions. Fixed the sequential reader to handle these more robustly + (John Bowler). + +Version 1.6.23rc01 [June 2, 2016] + Corrected progressive read input buffer in pngvalid.c. The previous version + the code invariably passed just one byte at a time to libpng. The intent + was to pass a random number of bytes in the range 0..511. + Moved sse2 prototype from pngpriv.h to contrib/intel/intel_sse.patch. + Added missing ")" in pngerror.c (Matt Sarrett). + +Version 1.6.23rc02 [June 4, 2016] + Fixed undefined behavior in png_push_save_buffer(). Do not call + memcpy() with a null source, even if count is zero (Leon Scroggins III). + +Version 1.6.23 [June 9, 2016] + Fixed bad link to RFC2083 in png.5 (Nikola Forro). + +Version 1.6.24beta01 [June 11, 2016] + Avoid potential overflow of the PNG_IMAGE_SIZE macro. This macro + is not used within libpng, but is used in some of the examples. + +Version 1.6.24beta02 [June 23, 2016] + Correct filter heuristic overflow handling. This was broken when the + write filter code was moved out-of-line; if there is a single filter and + the heuristic sum overflows the calculation of the filtered line is not + completed. In versions prior to 1.6 the code was duplicated in-line + and the check not performed, so the filter operation completed; however, + in the multi-filter case where the sum is performed the 'none' filter would + be selected if all the sums overflowed, even if it wasn't in the filter + list. The fix to the first problem is simply to provide PNG_SIZE_MAX as + the current lmins sum value; this means the sum can never exceed it and + overflows silently. A reasonable compiler that does choose to inline + the code will simply eliminate the sum check. + The fix to the second problem is to use high precision arithmetic (this is + implemented in 1.7), however a simple safe fix here is to chose the lowest + numbered filter in the list from png_set_filter (this only works if the + first problem is also fixed) (John Bowler). + Use a more efficient absolute value calculation on SSE2 (Matthieu Darbois). + Fixed the case where PNG_IMAGE_BUFFER_SIZE can overflow in the application + as a result of the application using an increased 'row_stride'; previously + png_image_finish_read only checked for overflow on the base calculation of + components. (I.e. it checked for overflow of a 32-bit number on the total + number of pixel components in the output format, not the possibly padded row + length and not the number of bytes, which for linear formats is twice the + number of components.) + MSVC does not like '-(unsigned)', so replaced it with 0U-(unsigned) + MSVC does not like (uInt) = -(unsigned) (i.e. as an initializer), unless + the conversion is explicitly invoked by a cast. + Put the SKIP definition in the correct place. It needs to come after the + png.h include (see all the other .c files in contrib/libtests) because it + depends on PNG_LIBPNG_VER. + Removed the three compile warning options from the individual project + files into the zlib.props globals. It increases the warning level from 4 + to All and adds a list of the warnings that need to be turned off. This is + semi-documentary; the intent is to tell libpng users which warnings have + been examined and judged non-fixable at present. The warning about + structure padding is fixable, but it would be a significant change (moving + structure members around). + +Version 1.6.24beta03 [July 4, 2016] + Optimized absolute value calculation in filter selection, similar to + code in the PAETH decoder in pngrutil.c. Build with PNG_USE_ABS to + use this. + Added pngcp to the build together with a pngcp.dfa configuration test. + Added high resolution timing to pngcp. + Added "Common linking failures" section to INSTALL. + Relocated misplaced #endif in png.c sRGB profile checking. + Fixed two Coverity issues in pngcp.c. + +Version 1.6.24beta04 [July 8, 2016] + Avoid filter-selection heuristic sum calculations in cases where only one + filter is a candidate for selection. This trades off code size (added + private png_setup_*_row_only() functions) for speed. + +Version 1.6.24beta05 [July 13, 2016] + Fixed some indentation to comply with our coding style. + Added contrib/tools/reindent. + +Version 1.6.24beta06 [July 18, 2016] + Fixed more indentation to comply with our coding style. + Eliminated unnecessary tests of boolean png_isaligned() vs 0. + +Version 1.6.24rc01 [July 25, 2016] + No changes. + +Version 1.6.24rc02 [August 1, 2016] + Conditionally compile SSE2 headers in contrib/intel/intel_sse.patch + Conditionally compile png_decompress_chunk(). + +Version 1.6.24rc03 [August 2, 2016] + Conditionally compile ARM_NEON headers in pngpriv.h + Updated contrib/intel/intel_sse.patch + +Version 1.6.24[August 4, 2016] + No changes. + +Version 1.6.25beta01 [August 12, 2016] + Reject oversized iCCP profile immediately. + Cleaned up PNG_DEBUG compile of pngtest.c. + Conditionally compile png_inflate(). + +Version 1.6.25beta02 [August 18, 2016] + Don't install pngcp; it conflicts with pngcp in the pngtools package. + Minor editing of INSTALL, (whitespace, added copyright line) + +Version 1.6.25rc01 [August 24, 2016] + No changes. + +Version 1.6.25rc02 [August 29, 2016] + Added MIPS support (Mandar Sahastrabuddhe ). + Only the UP filter is currently implemented. + +Version 1.6.25rc03 [August 29, 2016] + Rebased contrib/intel/intel_sse.patch after the MIPS implementation. + +Version 1.6.25rc04 [August 30, 2016] + Added MIPS support for SUB, AVG, and PAETH filters (Mandar Sahastrabuddhe). + +Version 1.6.25rc05 [August 30, 2016] + Rebased contrib/intel/intel_sse.patch after the MIPS implementation update.. + +Version 1.6.25 [September 1, 2016] + No changes. + +Version 1.6.26beta01 [September 26, 2016] + Fixed handling zero length IDAT in pngfix (bug report by Agostino Sarubbo, + bugfix by John Bowler). + Do not issue a png_error() on read in png_set_pCAL() because png_handle_pCAL + has allocated memory that libpng needs to free. + Conditionally compile png_set_benign_errors() in pngread.c and pngtest.c + Issue a png_benign_error instead of a png_error on ADLER32 mismatch + while decoding compressed data chunks. + Changed PNG_ZLIB_VERNUM to ZLIB_VERNUM in pngpriv.h, pngstruct.h, and + pngrutil.c. + If CRC handling of critical chunks has been set to PNG_CRC_QUIET_USE, + ignore the ADLER32 checksum in the IDAT chunk as well as the chunk CRCs. + Issue png_benign_error() on ADLER32 checksum mismatch instead of png_error(). + Add tests/badcrc.png and tests/badadler.png to tests/pngtest. + Merged pngtest.c with libpng-1.7.0beta84/pngtest.c + +Version 1.6.26beta02 [October 1, 2016] + Updated the documentation about CRC and ADLER32 handling. + Quieted 117 warnings from clang-3.8 in pngtrans.c, pngread.c, + pngwrite.c, pngunknown.c, and pngvalid.c. + Quieted 58 (out of 144) -Wconversion compiler warnings by changing + flag definitions in pngpriv.h from 0xnnnn to 0xnnnnU and trivial changes + in png.c, pngread.c, and pngwutil.c. + +Version 1.6.26beta03 [October 2, 2016] + Removed contrib/libtests/*.orig and *.rej that slipped into the tarballs. + Quieted the 86 remaining -Wconversion compiler warnings by + revising the png_isaligned() macro and trivial changes in png.c, + pngerror.c, pngget.c, pngmem.c, pngset.c, pngrtran.c, pngrutil.c, + pngwtran.c, pngwrite.c, and pngwutil.c. + +Version 1.6.26beta04 [October 3, 2016] + Quieted (bogus?) clang warnings about "absolute value has no effect" + when PNG_USE_ABS is defined. + Fixed offsets in contrib/intel/intel_sse.patch + +Version 1.6.26beta05 [October 6, 2016] + Changed integer constant 4294967294 to unsigned 4294967294U in pngconf.h + to avoid a signed/unsigned compare in the preprocessor. + +Version 1.6.26beta06 [October 7, 2016] + Use zlib-1.2.8.1 inflateValidate() instead of inflateReset2() to + optionally avoid ADLER32 evaluation. + +Version 1.6.26rc01 [October 12, 2016] + No changes. + +Version 1.6.26 [October 20, 2016] + Cosmetic change, "ptr != 0" to "ptr != NULL" in png.c and pngrutil.c + Despammed email addresses (replaced "@" with " at "). + +Version 1.6.27beta01 [November 2, 2016] + Restrict the new ADLER32-skipping to IDAT chunks. It broke iCCP chunk + handling: an erroneous iCCP chunk would throw a png_error and reject the + entire PNG image instead of rejecting just the iCCP chunk with a warning, + if built with zlib-1.2.8.1. + +Version 1.6.27rc01 [December 27, 2016] + Control ADLER32 checking with new PNG_IGNORE_ADLER32 option. Fixes + an endless loop when handling erroneous ADLER32 checksums; bug + introduced in libpng-1.6.26. + Removed the use of a macro containing the pre-processor 'defined' + operator. It is unclear whether this is valid; a macro that + "generates" 'defined' is not permitted, but the use of the word + "generates" within the C90 standard seems to imply more than simple + substitution of an expression itself containing a well-formed defined + operation. + Added ARM support to CMakeLists.txt (Andreas Franek). + +Version 1.6.27 [December 29, 2016] + Fixed a potential null pointer dereference in png_set_text_2() (bug report + and patch by Patrick Keshishian, CVE-2016-10087). + +Version 1.6.28rc01 [January 3, 2017] + Fixed arm/aarch64 detection in CMakeLists.txt (Gianfranco Costamagna). + Added option to Cmake build allowing a custom location of zlib to be + specified in a scenario where libpng is being built as a subproject + alongside zlib by another project (Sam Serrels). + Changed png_ptr->options from a png_byte to png_uint_32, to accommodate + up to 16 options. + +Version 1.6.28rc02 [January 4, 2017] + Added "include(GNUInstallDirs)" to CMakeLists.txt (Gianfranco Costamagna). + Moved SSE2 optimization code into the main libpng source directory. + Configure libpng with "configure --enable-intel-sse" or compile + libpng with "-DPNG_INTEL_SSE" in CPPFLAGS to enable it. + +Version 1.6.28rc03 [January 4, 2017] + Backed out the SSE optimization and last CMakeLists.txt to allow time for QA. + +Version 1.6.28 [January 5, 2017] + No changes. + +Version 1.6.29beta01 [January 12, 2017] + Readded "include(GNUInstallDirs)" to CMakeLists.txt (Gianfranco Costamagna). + Moved SSE2 optimization code into the main libpng source directory. + Configure libpng with "configure --enable-intel-sse" or compile + libpng with "-DPNG_INTEL_SSE" in CPPFLAGS to enable it. + Simplified conditional compilation in pngvalid.c, for AIX (Michael Felt). + +Version 1.6.29beta02 [February 22, 2017] + Avoid conditional directives that break statements in pngrutil.c (Romero + Malaquias) + The contrib/examples/pngtopng.c recovery code was in the wrong "if" + branches; the comments were correct. + Added code for PowerPC VSX optimisation (Vadim Barkov). + +Version 1.6.29beta03 [March 1, 2017] + Avoid potential overflow of shift operations in png_do_expand() (Aaron Boxer). + Change test ZLIB_VERNUM >= 0x1281 to ZLIB_VERNUM >= 0x1290 in pngrutil.c + because Solaris 11 distributes zlib-1.2.8.f that is older than 1.2.8.1, + as suggested in zlib FAQ, item 24. + Suppress clang warnings about implicit sign changes in png.c + +Version 1.6.29 [March 16, 2017] + No changes. + +Version 1.6.30beta01 [April 1, 2017] + Added missing "$(CPPFLAGS)" to the compile line for c.pic.o in + makefile.linux and makefile.solaris-x86 (Cosmin). + Revised documentation of png_get_error_ptr() in the libpng manual. + Silence clang -Wcomma and const drop warnings (Viktor Szakats). + Update Sourceforge URLs in documentation (https instead of http). + +Version 1.6.30beta02 [April 22, 2017] + Document need to check for integer overflow when allocating a pixel + buffer for multiple rows in contrib/gregbook, contrib/pngminus, + example.c, and in the manual (suggested by Jaeseung Choi). This + is similar to the bug reported against pngquant in CVE-2016-5735. + Removed reference to the obsolete PNG_SAFE_LIMITS macro in the documentation. + +Version 1.6.30beta03 [May 22, 2017] + Check for integer overflow in contrib/visupng and contrib/tools/genpng. + Do not double evaluate CMAKE_SYSTEM_PROCESSOR in CMakeLists.txt. + Test CMAKE_HOST_WIN32 instead of WIN32 in CMakeLists.txt. + Fix some URL in documentation. + +Version 1.6.30beta04 [June 7, 2017] + Avoid writing an empty IDAT when the last IDAT exactly fills the + compression buffer (bug report by Brian Baird). This bug was + introduced in libpng-1.6.0. + +Version 1.6.30rc01 [June 14, 2017] + No changes. + +Version 1.6.30rc02 [June 25, 2017] + Update copyright year in pnglibconf.h, make ltmain.sh executable. + Add a reference to the libpng.download site in README. + +Version 1.6.30 [June 28, 2017] + No changes. + +Version 1.6.31beta01 [July 5, 2017] + Guard the definition of _POSIX_SOURCE in pngpriv.h (AIX already defines it; + bug report by Michael Felt). + Revised pngpriv.h to work around failure to compile arm/filter_neon.S + ("typedef" directive is unrecognized by the assembler). The problem + was introduced in libpng-1.6.30beta01. + Added "Requires: zlib" to libpng.pc.in (Pieter Neerincx). + Added special case for FreeBSD in arm/filter_neon.S (Maya Rashish). + +Version 1.6.31beta02 [July 8, 2017] + Added instructions for disabling hardware optimizations in INSTALL. + Added "--enable-hardware-optimizations" configuration flag to enable + or disable all hardware optimizations with one flag. + +Version 1.6.31beta03 [July 9, 2017] + Updated CMakeLists.txt to add INTEL_SSE and MIPS_MSA platforms. + Changed "int" to "png_size_t" in intel/filter_sse2.c to prevent + possible integer overflow (Bug report by John Bowler). + Quieted "declaration after statement" warnings in intel/filter_sse2.c. + Added scripts/makefile-linux-opt, which has hardware optimizations enabled. + +Version 1.6.31beta04 [July 11, 2017] + Removed one of the GCC-7.1.0 'strict-overflow' warnings that result when + integers appear on both sides of a compare. Worked around the others by + forcing the strict-overflow setting in the relevant functions to a level + where they are not reported (John Bowler). + Changed "FALL THROUGH" comments to "FALLTHROUGH" because GCC doesn't like + the space. + Worked around some C-style casts from (void*) because g++ 5.4.0 objects + to them. + Increased the buffer size for 'sprint' to pass the gcc 7.1.0 'sprint + overflow' check that is on by default with -Wall -Wextra. + +Version 1.6.31beta05 [July 13, 2017] + Added eXIf chunk support. + +Version 1.6.31beta06 [July 17, 2017] + Added a minimal eXIf chunk (with Orientation and FocalLengthIn35mmFilm + tags) to pngtest.png. + +Version 1.6.31beta07 [July 18, 2017] + Revised the eXIf chunk in pngtest.png to fix "Bad IFD1 Directory" warning. + +Version 1.6.31rc01 [July 19, 2017] + No changes. + +Version 1.6.31rc02 [July 25, 2017] + Fixed typo in example.c (png_free_image should be png_image_free) (Bug + report by John Smith) + +Version 1.6.31 [July 27, 2017] + No changes. + +Version 1.6.32beta01 [July 31, 2017] + Avoid possible NULL dereference in png_handle_eXIf when benign_errors + are allowed. Avoid leaking the input buffer "eXIf_buf". + Eliminated png_ptr->num_exif member from pngstruct.h and added num_exif + to arguments for png_get_eXIf() and png_set_eXIf(). + Added calls to png_handle_eXIf(() in pngread.c and png_write_eXIf() in + pngwrite.c, and made various other fixes to png_write_eXIf(). + Changed name of png_get_eXIF and png_set_eXIf() to png_get_eXIf_1() and + png_set_eXIf_1(), respectively, to avoid breaking API compatibility + with libpng-1.6.31. + +Version 1.6.32beta02 [August 1, 2017] + Updated contrib/libtests/pngunknown.c with eXIf chunk. + +Version 1.6.32beta03 [August 2, 2017] + Initialized btoa[] in pngstest.c + Stop memory leak when returning from png_handle_eXIf() with an error + (Bug report from the OSS-fuzz project). + +Version 1.6.32beta04 [August 2, 2017] + Replaced local eXIf_buf with info_ptr-eXIf_buf in png_handle_eXIf(). + Update libpng.3 and libpng-manual.txt about eXIf functions. + +Version 1.6.32beta05 [August 2, 2017] + Restored png_get_eXIf() and png_set_eXIf() to maintain API compatibility. + +Version 1.6.32beta06 [August 2, 2017] + Removed png_get_eXIf_1() and png_set_eXIf_1(). + +Version 1.6.32beta07 [August 3, 2017] + Check length of all chunks except IDAT against user limit to fix an + OSS-fuzz issue (Fixes CVE-2017-12652). + +Version 1.6.32beta08 [August 3, 2017] + Check length of IDAT against maximum possible IDAT size, accounting + for height, rowbytes, interlacing and zlib/deflate overhead. + Restored png_get_eXIf_1() and png_set_eXIf_1(), because strlen(eXIf_buf) + does not work (the eXIf chunk data can contain zeroes). + +Version 1.6.32beta09 [August 3, 2017] + Require cmake-2.8.8 in CMakeLists.txt. Revised symlink creation, + no longer using deprecated cmake LOCATION feature (Clifford Yapp). + Fixed five-byte error in the calculation of IDAT maximum possible size. + +Version 1.6.32beta10 [August 5, 2017] + Moved chunk-length check into a png_check_chunk_length() private + function (Suggested by Max Stepin). + Moved bad pngs from tests to contrib/libtests/crashers + Moved testing of bad pngs into a separate tests/pngtest-badpngs script + Added the --xfail (expected FAIL) option to pngtest.c. It writes XFAIL + in the output but PASS for the libpng test. + Require cmake-3.0.2 in CMakeLists.txt (Clifford Yapp). + Fix "const" declaration info_ptr argument to png_get_eXIf_1() and the + num_exif argument to png_get_eXIf_1() (Github Issue 171). + +Version 1.6.32beta11 [August 7, 2017] + Added "eXIf" to "chunks_to_ignore[]" in png_set_keep_unknown_chunks(). + Added huge_IDAT.png and empty_ancillary_chunks.png to testpngs/crashers. + Make pngtest --strict, --relax, --xfail options imply -m (multiple). + Removed unused chunk_name parameter from png_check_chunk_length(). + Relocated setting free_me for eXIf data, to stop an OSS-fuzz leak. + Initialize profile_header[] in png_handle_iCCP() to fix OSS-fuzz issue. + Initialize png_ptr->row_buf[0] to 255 in png_read_row() to fix OSS-fuzz UMR. + Attempt to fix a UMR in png_set_text_2() to fix OSS-fuzz issue. + Increase minimum zlib stream from 9 to 14 in png_handle_iCCP(), to account + for the minimum 'deflate' stream, and relocate the test to a point + after the keyword has been read. + Check that the eXIf chunk has at least 2 bytes and begins with "II" or "MM". + +Version 1.6.32rc01 [August 18, 2017] + Added a set of "huge_xxxx_chunk.png" files to contrib/testpngs/crashers, + one for each known chunk type, with length = 2GB-1. + Check for 0 return from png_get_rowbytes() and added some (size_t) typecasts + in contrib/pngminus/*.c to stop some Coverity issues (162705, 162706, + and 162707). + Renamed chunks in contrib/testpngs/crashers to avoid having files whose + names differ only in case; this causes problems with some platforms + (github issue #172). + +Version 1.6.32rc02 [August 22, 2017] + Added contrib/oss-fuzz directory which contains files used by the oss-fuzz + project (https://github.com/google/oss-fuzz/tree/master/projects/libpng). + +Version 1.6.32 [August 24, 2017] + No changes. + +Version 1.6.33beta01 [August 28, 2017] + Added PNGMINUS_UNUSED macro to contrib/pngminus/p*.c and added missing + parenthesis in contrib/pngminus/pnm2png.c (bug report by Christian Hesse). + Fixed off-by-one error in png_do_check_palette_indexes() (Bug report + by Mick P., Source Forge Issue #269). + +Version 1.6.33beta02 [September 3, 2017] + Initialize png_handler.row_ptr in contrib/oss-fuzz/libpng_read_fuzzer.cc + to fix shortlived oss-fuzz issue 3234. + Compute a larger limit on IDAT because some applications write a deflate + buffer for each row (Bug report by Andrew Church). + Use current date (DATE) instead of release-date (RDATE) in last + changed date of contrib/oss-fuzz files. + Enabled ARM support in CMakeLists.txt (Bernd Kuhls). + +Version 1.6.33beta03 [September 14, 2017] + Fixed incorrect typecast of some arguments to png_malloc() and + png_calloc() that were png_uint_32 instead of png_alloc_size_t + (Bug report by "irwir" in Github libpng issue #175). + Use pnglibconf.h.prebuilt when building for ANDROID with cmake (Github + issue 162, by rcdailey). + +Version 1.6.33rc01 [September 20, 2017] + Initialize memory allocated by png_inflate to zero, using memset, to + stop an oss-fuzz "use of uninitialized value" detection in png_set_text_2() + due to truncated iTXt or zTXt chunk. + Initialize memory allocated by png_read_buffer to zero, using memset, to + stop an oss-fuzz "use of uninitialized value" detection in + png_icc_check_tag_table() due to truncated iCCP chunk. + Removed a redundant test (suggested by "irwir" in Github issue #180). + +Version 1.6.33rc02 [September 23, 2017] + Added an interlaced version of each file in contrib/pngsuite. + Relocate new memset() call in pngrutil.c. + Removed more redundant tests (suggested by "irwir" in Github issue #180). + Add support for loading images with associated alpha in the Simplified + API (Samuel Williams). + +Version 1.6.33 [September 28, 2017] + Revert contrib/oss-fuzz/libpng_read_fuzzer.cc to libpng-1.6.32 state. + Initialize png_handler.row_ptr in contrib/oss-fuzz/libpng_read_fuzzer.cc + Add end_info structure and png_read_end() to the libpng fuzzer. + +Version 1.6.34 [September 29, 2017] + Removed contrib/pngsuite/i*.png; some of them caused test failures. + +Version 1.6.35beta01 [March 6, 2018] + Restored 21 of the contrib/pngsuite/i*.png, which do not cause test + failures. Placed the remainder in contrib/pngsuite/interlaced/i*.png. + Added calls to png_set_*() transforms commonly used by browsers to + the fuzzer. + Removed some unnecessary brackets in pngrtran.c + Fixed miscellaneous typos (Patch by github user "luzpaz"). + Change "ASM C" to "C ASM" in CMakeLists.txt + Fixed incorrect handling of bKGD chunk in sub-8-bit files (Cosmin) + Added hardware optimization directories to zip and 7z distributions. + Fixed incorrect bitmask for options. + Fixed many spelling typos. + +Version 1.6.35beta02 [March 28, 2018] + Make png_get_iCCP consistent with man page (allow compression-type argument + to be NULL, bug report by Lenard Szolnoki). + +Version 1.6.35 [July 15, 2018] + Replaced the remaining uses of png_size_t with size_t (Cosmin) + Fixed the calculation of row_factor in png_check_chunk_length + (reported by Thuan Pham in SourceForge issue #278) + Added missing parentheses to a macro definition + (suggested by "irwir" in GitHub issue #216) + +Version 1.6.36 [December 1, 2018] + Optimized png_do_expand_palette for ARM processors. + Improved performance by around 10-22% on a recent ARM Chromebook. + (Contributed by Richard Townsend, ARM Holdings) + Fixed manipulation of machine-specific optimization options. + (Contributed by Vicki Pfau) + Used memcpy instead of manual pointer arithmetic on Intel SSE2. + (Contributed by Samuel Williams) + Fixed build errors with MSVC on ARM64. + (Contributed by Zhijie Liang) + Fixed detection of libm in CMakeLists. + (Contributed by Cameron Cawley) + Fixed incorrect creation of pkg-config file in CMakeLists. + (Contributed by Kyle Bentley) + Fixed the CMake build on Windows MSYS by avoiding symlinks. + Fixed a build warning on OpenBSD. + (Contributed by Theo Buehler) + Fixed various typos in comments. + (Contributed by "luz.paz") + Raised the minimum required CMake version from 3.0.2 to 3.1. + Removed yet more of the vestigial support for pre-ANSI C compilers. + Removed ancient makefiles for ancient systems that have been broken + across all previous libpng-1.6.x versions. + Removed the Y2K compliance statement and the export control + information. + Applied various code style and documentation fixes. + +Version 1.6.37 [April 14, 2019] + Fixed a use-after-free vulnerability (CVE-2019-7317) in png_image_free. + Fixed a memory leak in the ARM NEON implementation of png_do_expand_palette. + Fixed a memory leak in pngtest.c. + Fixed two vulnerabilities (CVE-2018-14048, CVE-2018-14550) in + contrib/pngminus; refactor. + Changed the license of contrib/pngminus to MIT; refresh makefile and docs. + (Contributed by Willem van Schaik) + Fixed a typo in the libpng license v2. + (Contributed by Miguel Ojeda) + Added makefiles for AddressSanitizer-enabled builds. + Cleaned up various makefiles. + +Send comments/corrections/commendations to png-mng-implement at lists.sf.net. +Subscription is required; visit https://lists.sourceforge.net/lists/listinfo/png-mng-implement -to subscribe) -or to glennrp at users.sourceforge.net - -Glenn R-P -#endif +to subscribe. diff --git a/extern/libpng/CMakeLists.txt b/extern/libpng/CMakeLists.txt new file mode 100644 index 0000000000..6451fcf1bc --- /dev/null +++ b/extern/libpng/CMakeLists.txt @@ -0,0 +1,931 @@ +# CMakeLists.txt + +# Copyright (C) 2018 Cosmin Truta +# Copyright (C) 2007,2009-2018 Glenn Randers-Pehrson +# Written by Christian Ehrlicher, 2007 +# Revised by Roger Lowman, 2009-2010 +# Revised by Clifford Yapp, 2011-2012,2017 +# Revised by Roger Leigh, 2016 +# Revised by Andreas Franek, 2016 +# Revised by Sam Serrels, 2017 +# Revised by Vadim Barkov, 2017 +# Revised by Vicky Pfau, 2018 +# Revised by Cameron Cawley, 2018 +# Revised by Cosmin Truta, 2018 +# Revised by Kyle Bentley, 2018 + +# This code is released under the libpng license. +# For conditions of distribution and use, see the disclaimer +# and license in png.h + +cmake_minimum_required(VERSION 3.1) +cmake_policy(VERSION 3.1) + +project(libpng C ASM) +enable_testing() + +set(PNGLIB_MAJOR 1) +set(PNGLIB_MINOR 6) +set(PNGLIB_RELEASE 37) +set(PNGLIB_NAME libpng${PNGLIB_MAJOR}${PNGLIB_MINOR}) +set(PNGLIB_VERSION ${PNGLIB_MAJOR}.${PNGLIB_MINOR}.${PNGLIB_RELEASE}) + +include(GNUInstallDirs) + +# needed packages + +# Allow users to specify location of Zlib. +# Useful if zlib is being built alongside this as a sub-project. +option(PNG_BUILD_ZLIB "Custom zlib Location, else find_package is used" OFF) + +if(NOT PNG_BUILD_ZLIB) + find_package(ZLIB REQUIRED) + include_directories(${ZLIB_INCLUDE_DIR}) +endif() + +if(UNIX AND NOT APPLE AND NOT BEOS AND NOT HAIKU) + find_library(M_LIBRARY m) +else() + # libm is not needed and/or not available + set(M_LIBRARY "") +endif() + +# COMMAND LINE OPTIONS +option(PNG_SHARED "Build shared lib" ON) +option(PNG_STATIC "Build static lib" ON) +option(PNG_TESTS "Build libpng tests" ON) + +# Many more configuration options could be added here +option(PNG_FRAMEWORK "Build OS X framework" OFF) +option(PNG_DEBUG "Build with debug output" OFF) +option(PNG_HARDWARE_OPTIMIZATIONS "Enable hardware optimizations" ON) + +set(PNG_PREFIX "" CACHE STRING "Prefix to add to the API function names") +set(DFA_XTRA "" CACHE FILEPATH "File containing extra configuration settings") + +if(PNG_HARDWARE_OPTIMIZATIONS) + +# set definitions and sources for arm +if(CMAKE_SYSTEM_PROCESSOR MATCHES "^arm" OR + CMAKE_SYSTEM_PROCESSOR MATCHES "^aarch64") + set(PNG_ARM_NEON_POSSIBLE_VALUES check on off) + set(PNG_ARM_NEON "check" CACHE STRING "Enable ARM NEON optimizations: + check: (default) use internal checking code; + off: disable the optimizations; + on: turn on unconditionally.") + set_property(CACHE PNG_ARM_NEON PROPERTY STRINGS + ${PNG_ARM_NEON_POSSIBLE_VALUES}) + list(FIND PNG_ARM_NEON_POSSIBLE_VALUES ${PNG_ARM_NEON} index) + if(index EQUAL -1) + message(FATAL_ERROR + "PNG_ARM_NEON must be one of [${PNG_ARM_NEON_POSSIBLE_VALUES}]") + elseif(NOT ${PNG_ARM_NEON} STREQUAL "off") + set(libpng_arm_sources + arm/arm_init.c + arm/filter_neon.S + arm/filter_neon_intrinsics.c + arm/palette_neon_intrinsics.c) + + if(${PNG_ARM_NEON} STREQUAL "on") + add_definitions(-DPNG_ARM_NEON_OPT=2) + elseif(${PNG_ARM_NEON} STREQUAL "check") + add_definitions(-DPNG_ARM_NEON_CHECK_SUPPORTED) + endif() + else() + add_definitions(-DPNG_ARM_NEON_OPT=0) + endif() +endif() + +# set definitions and sources for powerpc +if(CMAKE_SYSTEM_PROCESSOR MATCHES "^powerpc*" OR + CMAKE_SYSTEM_PROCESSOR MATCHES "^ppc64*") + set(PNG_POWERPC_VSX_POSSIBLE_VALUES on off) + set(PNG_POWERPC_VSX "on" CACHE STRING "Enable POWERPC VSX optimizations: + off: disable the optimizations.") + set_property(CACHE PNG_POWERPC_VSX PROPERTY STRINGS + ${PNG_POWERPC_VSX_POSSIBLE_VALUES}) + list(FIND PNG_POWERPC_VSX_POSSIBLE_VALUES ${PNG_POWERPC_VSX} index) + if(index EQUAL -1) + message(FATAL_ERROR + "PNG_POWERPC_VSX must be one of [${PNG_POWERPC_VSX_POSSIBLE_VALUES}]") + elseif(NOT ${PNG_POWERPC_VSX} STREQUAL "off") + set(libpng_powerpc_sources + powerpc/powerpc_init.c + powerpc/filter_vsx_intrinsics.c) + if(${PNG_POWERPC_VSX} STREQUAL "on") + add_definitions(-DPNG_POWERPC_VSX_OPT=2) + endif() + else() + add_definitions(-DPNG_POWERPC_VSX_OPT=0) + endif() +endif() + +# set definitions and sources for intel +if(CMAKE_SYSTEM_PROCESSOR MATCHES "^i?86" OR + CMAKE_SYSTEM_PROCESSOR MATCHES "^x86_64*") + set(PNG_INTEL_SSE_POSSIBLE_VALUES on off) + set(PNG_INTEL_SSE "on" CACHE STRING "Enable INTEL_SSE optimizations: + off: disable the optimizations") + set_property(CACHE PNG_INTEL_SSE PROPERTY STRINGS + ${PNG_INTEL_SSE_POSSIBLE_VALUES}) + list(FIND PNG_INTEL_SSE_POSSIBLE_VALUES ${PNG_INTEL_SSE} index) + if(index EQUAL -1) + message(FATAL_ERROR + "PNG_INTEL_SSE must be one of [${PNG_INTEL_SSE_POSSIBLE_VALUES}]") + elseif(NOT ${PNG_INTEL_SSE} STREQUAL "off") + set(libpng_intel_sources + intel/intel_init.c + intel/filter_sse2_intrinsics.c) + if(${PNG_INTEL_SSE} STREQUAL "on") + add_definitions(-DPNG_INTEL_SSE_OPT=1) + endif() + else() + add_definitions(-DPNG_INTEL_SSE_OPT=0) + endif() +endif() + +# set definitions and sources for MIPS +if(CMAKE_SYSTEM_PROCESSOR MATCHES "mipsel*" OR + CMAKE_SYSTEM_PROCESSOR MATCHES "mips64el*") + set(PNG_MIPS_MSA_POSSIBLE_VALUES on off) + set(PNG_MIPS_MSA "on" CACHE STRING "Enable MIPS_MSA optimizations: + off: disable the optimizations") + set_property(CACHE PNG_MIPS_MSA PROPERTY STRINGS + ${PNG_MIPS_MSA_POSSIBLE_VALUES}) + list(FIND PNG_MIPS_MSA_POSSIBLE_VALUES ${PNG_MIPS_MSA} index) + if(index EQUAL -1) + message(FATAL_ERROR + "PNG_MIPS_MSA must be one of [${PNG_MIPS_MSA_POSSIBLE_VALUES}]") + elseif(NOT ${PNG_MIPS_MSA} STREQUAL "off") + set(libpng_mips_sources + mips/mips_init.c + mips/filter_msa_intrinsics.c) + if(${PNG_MIPS_MSA} STREQUAL "on") + add_definitions(-DPNG_MIPS_MSA_OPT=2) + endif() + else() + add_definitions(-DPNG_MIPS_MSA_OPT=0) + endif() +endif() + +else(PNG_HARDWARE_OPTIMIZATIONS) + +# set definitions and sources for arm +if(CMAKE_SYSTEM_PROCESSOR MATCHES "^arm" OR + CMAKE_SYSTEM_PROCESSOR MATCHES "^aarch64") + add_definitions(-DPNG_ARM_NEON_OPT=0) +endif() + +# set definitions and sources for powerpc +if(CMAKE_SYSTEM_PROCESSOR MATCHES "^powerpc*" OR + CMAKE_SYSTEM_PROCESSOR MATCHES "^ppc64*") + add_definitions(-DPNG_POWERPC_VSX_OPT=0) +endif() + +# set definitions and sources for intel +if(CMAKE_SYSTEM_PROCESSOR MATCHES "^i?86" OR + CMAKE_SYSTEM_PROCESSOR MATCHES "^x86_64*") + add_definitions(-DPNG_INTEL_SSE_OPT=0) +endif() + +# set definitions and sources for MIPS +if(CMAKE_SYSTEM_PROCESSOR MATCHES "mipsel*" OR + CMAKE_SYSTEM_PROCESSOR MATCHES "mips64el*") + add_definitions(-DPNG_MIPS_MSA_OPT=0) +endif() + +endif(PNG_HARDWARE_OPTIMIZATIONS) + +# SET LIBNAME +set(PNG_LIB_NAME png${PNGLIB_MAJOR}${PNGLIB_MINOR}) + +# to distinguish between debug and release lib +set(CMAKE_DEBUG_POSTFIX "d") + +include(CheckCSourceCompiles) +option(ld-version-script "Enable linker version script" ON) +if(ld-version-script AND NOT APPLE) + # Check if LD supports linker scripts. + file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/conftest.map" "VERS_1 { + global: sym; + local: *; +}; + +VERS_2 { + global: sym2; + main; +} VERS_1; +") + set(CMAKE_REQUIRED_FLAGS_SAVE ${CMAKE_REQUIRED_FLAGS}) + set(CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS} "-Wl,--version-script='${CMAKE_CURRENT_BINARY_DIR}/conftest.map'") + check_c_source_compiles("void sym(void) {} +void sym2(void) {} +int main(void) {return 0;} +" HAVE_LD_VERSION_SCRIPT) + if(NOT HAVE_LD_VERSION_SCRIPT) + set(CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS_SAVE} "-Wl,-M -Wl,${CMAKE_CURRENT_BINARY_DIR}/conftest.map") + check_c_source_compiles("void sym(void) {} +void sym2(void) {} +int main(void) {return 0;} +" HAVE_SOLARIS_LD_VERSION_SCRIPT) + endif() + set(CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS_SAVE}) + file(REMOVE "${CMAKE_CURRENT_BINARY_DIR}/conftest.map") +endif() + +# Find symbol prefix. Likely obsolete and unnecessary with recent +# toolchains (it's not done in many other projects). +function(symbol_prefix) + set(SYMBOL_PREFIX) + + execute_process(COMMAND "${CMAKE_C_COMPILER}" "-E" "-" + INPUT_FILE /dev/null + OUTPUT_VARIABLE OUT + RESULT_VARIABLE STATUS) + + if(CPP_FAIL) + message(WARNING "Failed to run the C preprocessor") + endif() + + string(REPLACE "\n" ";" OUT "${OUT}") + foreach(line ${OUT}) + string(REGEX MATCH "^PREFIX=" found_match "${line}") + if(found_match) + string(REGEX REPLACE "^PREFIX=(.*\)" "\\1" prefix "${line}") + string(REGEX MATCH "__USER_LABEL_PREFIX__" found_match "${prefix}") + if(found_match) + string(REGEX REPLACE "(.*)__USER_LABEL_PREFIX__(.*)" "\\1\\2" prefix "${prefix}") + endif() + set(SYMBOL_PREFIX "${prefix}") + endif() + endforeach() + + message(STATUS "Symbol prefix: ${SYMBOL_PREFIX}") + set(SYMBOL_PREFIX "${SYMBOL_PREFIX}" PARENT_SCOPE) +endfunction() + +if(UNIX) + symbol_prefix() +endif() + +find_program(AWK NAMES gawk awk) + +include_directories(${CMAKE_CURRENT_BINARY_DIR}) + +if(NOT AWK OR ANDROID) + # No awk available to generate sources; use pre-built pnglibconf.h + configure_file(${CMAKE_CURRENT_SOURCE_DIR}/scripts/pnglibconf.h.prebuilt + ${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.h) + add_custom_target(genfiles) # Dummy +else() + include(CMakeParseArguments) + # Generate .chk from .out with awk + # generate_chk(INPUT inputfile OUTPUT outputfile [DEPENDS dep1 [dep2...]]) + function(generate_chk) + set(options) + set(oneValueArgs INPUT OUTPUT) + set(multiValueArgs DEPENDS) + cmake_parse_arguments(_GC "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN}) + if(NOT _GC_INPUT) + message(FATAL_ERROR "generate_chk: Missing INPUT argument") + endif() + if(NOT _GC_OUTPUT) + message(FATAL_ERROR "generate_chk: Missing OUTPUT argument") + endif() + + add_custom_command(OUTPUT "${_GC_OUTPUT}" + COMMAND "${CMAKE_COMMAND}" + "-DINPUT=${_GC_INPUT}" + "-DOUTPUT=${_GC_OUTPUT}" + -P "${CMAKE_CURRENT_BINARY_DIR}/scripts/genchk.cmake" + DEPENDS "${_GC_INPUT}" ${_GC_DEPENDS} + WORKING_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}") + endfunction() + + # Generate .out from .c with awk + # generate_out(INPUT inputfile OUTPUT outputfile [DEPENDS dep1 [dep2...]]) + function(generate_out) + set(options) + set(oneValueArgs INPUT OUTPUT) + set(multiValueArgs DEPENDS) + cmake_parse_arguments(_GO "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN}) + if(NOT _GO_INPUT) + message(FATAL_ERROR "generate_out: Missing INPUT argument") + endif() + if(NOT _GO_OUTPUT) + message(FATAL_ERROR "generate_out: Missing OUTPUT argument") + endif() + + add_custom_command(OUTPUT "${_GO_OUTPUT}" + COMMAND "${CMAKE_COMMAND}" + "-DINPUT=${_GO_INPUT}" + "-DOUTPUT=${_GO_OUTPUT}" + -P "${CMAKE_CURRENT_BINARY_DIR}/scripts/genout.cmake" + DEPENDS "${_GO_INPUT}" ${_GO_DEPENDS} + WORKING_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}") + endfunction() + + # Generate specific source file with awk + # generate_source(OUTPUT outputfile [DEPENDS dep1 [dep2...]]) + function(generate_source) + set(options) + set(oneValueArgs OUTPUT) + set(multiValueArgs DEPENDS) + cmake_parse_arguments(_GSO "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN}) + if(NOT _GSO_OUTPUT) + message(FATAL_ERROR "generate_source: Missing OUTPUT argument") + endif() + + add_custom_command(OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/${_GSO_OUTPUT}" + COMMAND "${CMAKE_COMMAND}" + "-DOUTPUT=${_GSO_OUTPUT}" + -P "${CMAKE_CURRENT_BINARY_DIR}/scripts/gensrc.cmake" + DEPENDS ${_GSO_DEPENDS} + WORKING_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}") + endfunction() + + # Copy file + function(generate_copy source destination) + add_custom_command(OUTPUT "${destination}" + COMMAND "${CMAKE_COMMAND}" -E remove "${destination}" + COMMAND "${CMAKE_COMMAND}" -E copy "${source}" + "${destination}" + DEPENDS "${source}") + endfunction() + + # Generate scripts/pnglibconf.h + generate_source(OUTPUT "scripts/pnglibconf.c" + DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/scripts/pnglibconf.dfa" + "${CMAKE_CURRENT_SOURCE_DIR}/scripts/options.awk" + "${CMAKE_CURRENT_SOURCE_DIR}/pngconf.h") + + # Generate pnglibconf.c + generate_source(OUTPUT "pnglibconf.c" + DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/scripts/pnglibconf.dfa" + "${CMAKE_CURRENT_SOURCE_DIR}/scripts/options.awk" + "${CMAKE_CURRENT_SOURCE_DIR}/pngconf.h") + + if(PNG_PREFIX) + set(PNGLIBCONF_H_EXTRA_DEPENDS + "${CMAKE_CURRENT_BINARY_DIR}/scripts/prefix.out" + "${CMAKE_CURRENT_SOURCE_DIR}/scripts/macro.lst") + set(PNGPREFIX_H_EXTRA_DEPENDS + "${CMAKE_CURRENT_BINARY_DIR}/scripts/intprefix.out") + endif() + + generate_out(INPUT "${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.c" + OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.out") + + # Generate pnglibconf.h + generate_source(OUTPUT "pnglibconf.h" + DEPENDS "${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.out" + ${PNGLIBCONF_H_EXTRA_DEPENDS}) + + generate_out(INPUT "${CMAKE_CURRENT_SOURCE_DIR}/scripts/intprefix.c" + OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/scripts/intprefix.out" + DEPENDS "${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.h") + + generate_out(INPUT "${CMAKE_CURRENT_SOURCE_DIR}/scripts/prefix.c" + OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/scripts/prefix.out" + DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/png.h" + "${CMAKE_CURRENT_SOURCE_DIR}/pngconf.h" + "${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.out") + + # Generate pngprefix.h + generate_source(OUTPUT "pngprefix.h" + DEPENDS ${PNGPREFIX_H_EXTRA_DEPENDS}) + + generate_out(INPUT "${CMAKE_CURRENT_SOURCE_DIR}/scripts/sym.c" + OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/scripts/sym.out" + DEPENDS "${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.h") + + generate_out(INPUT "${CMAKE_CURRENT_SOURCE_DIR}/scripts/symbols.c" + OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/scripts/symbols.out" + DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/png.h" + "${CMAKE_CURRENT_SOURCE_DIR}/pngconf.h" + "${CMAKE_CURRENT_SOURCE_DIR}/scripts/pnglibconf.h.prebuilt") + + generate_out(INPUT "${CMAKE_CURRENT_SOURCE_DIR}/scripts/vers.c" + OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/scripts/vers.out" + DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/png.h" + "${CMAKE_CURRENT_SOURCE_DIR}/pngconf.h" + "${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.h") + + generate_chk(INPUT "${CMAKE_CURRENT_BINARY_DIR}/scripts/symbols.out" + OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/scripts/symbols.chk" + DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/scripts/checksym.awk" + "${CMAKE_CURRENT_SOURCE_DIR}/scripts/symbols.def") + + add_custom_target(symbol-check DEPENDS + "${CMAKE_CURRENT_BINARY_DIR}/scripts/symbols.chk") + + generate_copy("${CMAKE_CURRENT_BINARY_DIR}/scripts/sym.out" + "${CMAKE_CURRENT_BINARY_DIR}/libpng.sym") + generate_copy("${CMAKE_CURRENT_BINARY_DIR}/scripts/vers.out" + "${CMAKE_CURRENT_BINARY_DIR}/libpng.vers") + + add_custom_target(genvers DEPENDS "${CMAKE_CURRENT_BINARY_DIR}/libpng.vers") + add_custom_target(gensym DEPENDS "${CMAKE_CURRENT_BINARY_DIR}/libpng.sym") + + add_custom_target("genprebuilt" + COMMAND "${CMAKE_COMMAND}" + "-DOUTPUT=scripts/pnglibconf.h.prebuilt" + -P "${CMAKE_CURRENT_BINARY_DIR}/scripts/gensrc.cmake" + WORKING_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}") + + # A single target handles generation of all generated files. If + # they are depended upon separately by multiple targets, this + # confuses parallel make (it would require a separate top-level + # target for each file to track the dependencies properly). + add_custom_target(genfiles DEPENDS + "${CMAKE_CURRENT_BINARY_DIR}/libpng.sym" + "${CMAKE_CURRENT_BINARY_DIR}/libpng.vers" + "${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.c" + "${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.h" + "${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.out" + "${CMAKE_CURRENT_BINARY_DIR}/pngprefix.h" + "${CMAKE_CURRENT_BINARY_DIR}/scripts/intprefix.out" + "${CMAKE_CURRENT_BINARY_DIR}/scripts/pnglibconf.c" + "${CMAKE_CURRENT_BINARY_DIR}/scripts/prefix.out" + "${CMAKE_CURRENT_BINARY_DIR}/scripts/sym.out" + "${CMAKE_CURRENT_BINARY_DIR}/scripts/symbols.chk" + "${CMAKE_CURRENT_BINARY_DIR}/scripts/symbols.out" + "${CMAKE_CURRENT_BINARY_DIR}/scripts/vers.out") +endif(NOT AWK OR ANDROID) + +# OUR SOURCES +set(libpng_public_hdrs + png.h + pngconf.h + "${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.h" +) +set(libpng_private_hdrs + pngpriv.h + pngdebug.h + pnginfo.h + pngstruct.h +) +if(AWK AND NOT ANDROID) + list(APPEND libpng_private_hdrs "${CMAKE_CURRENT_BINARY_DIR}/pngprefix.h") +endif() +set(libpng_sources + ${libpng_public_hdrs} + ${libpng_private_hdrs} + png.c + pngerror.c + pngget.c + pngmem.c + pngpread.c + pngread.c + pngrio.c + pngrtran.c + pngrutil.c + pngset.c + pngtrans.c + pngwio.c + pngwrite.c + pngwtran.c + pngwutil.c + ${libpng_arm_sources} + ${libpng_intel_sources} + ${libpng_mips_sources} + ${libpng_powerpc_sources} +) +set(pngtest_sources + pngtest.c +) +set(pngvalid_sources + contrib/libtests/pngvalid.c +) +set(pngstest_sources + contrib/libtests/pngstest.c +) +set(pngunknown_sources + contrib/libtests/pngunknown.c +) +set(pngimage_sources + contrib/libtests/pngimage.c +) +set(pngfix_sources + contrib/tools/pngfix.c +) +set(png_fix_itxt_sources + contrib/tools/png-fix-itxt.c +) + +if(MSVC) + add_definitions(-D_CRT_SECURE_NO_DEPRECATE) +endif() + +if(PNG_DEBUG) + add_definitions(-DPNG_DEBUG) +endif() + +# NOW BUILD OUR TARGET +include_directories(${CMAKE_CURRENT_SOURCE_DIR} ${ZLIB_INCLUDE_DIR}) + +unset(PNG_LIB_TARGETS) + +if(PNG_SHARED) + add_library(png SHARED ${libpng_sources}) + set(PNG_LIB_TARGETS png) + set_target_properties(png PROPERTIES OUTPUT_NAME ${PNG_LIB_NAME}) + add_dependencies(png genfiles) + if(MSVC) + # msvc does not append 'lib' - do it here to have consistent name + set_target_properties(png PROPERTIES PREFIX "lib") + set_target_properties(png PROPERTIES IMPORT_PREFIX "lib") + endif() + target_link_libraries(png ${ZLIB_LIBRARY} ${M_LIBRARY}) + + if(UNIX AND AWK) + if(HAVE_LD_VERSION_SCRIPT) + set_target_properties(png PROPERTIES LINK_FLAGS + "-Wl,--version-script='${CMAKE_CURRENT_BINARY_DIR}/libpng.vers'") + elseif(HAVE_SOLARIS_LD_VERSION_SCRIPT) + set_target_properties(png PROPERTIES LINK_FLAGS + "-Wl,-M -Wl,'${CMAKE_CURRENT_BINARY_DIR}/libpng.vers'") + endif() + endif() +endif() + +if(PNG_STATIC) + # does not work without changing name + set(PNG_LIB_NAME_STATIC png_static) + add_library(png_static STATIC ${libpng_sources}) + add_dependencies(png_static genfiles) + # MSVC doesn't use a different file extension for shared vs. static + # libs. We are able to change OUTPUT_NAME to remove the _static + # for all other platforms. + if(NOT MSVC) + set_target_properties(png_static PROPERTIES + OUTPUT_NAME "${PNG_LIB_NAME}" + CLEAN_DIRECT_OUTPUT 1) + else() + set_target_properties(png_static PROPERTIES + OUTPUT_NAME "${PNG_LIB_NAME}_static" + CLEAN_DIRECT_OUTPUT 1) + endif() + list(APPEND PNG_LIB_TARGETS png_static) + if(MSVC) + # msvc does not append 'lib' - do it here to have consistent name + set_target_properties(png_static PROPERTIES PREFIX "lib") + endif() + target_link_libraries(png_static ${ZLIB_LIBRARY} ${M_LIBRARY}) +endif() + +if(PNG_FRAMEWORK) + set(PNG_LIB_NAME_FRAMEWORK png_framework) + add_library(png_framework SHARED ${libpng_sources}) + add_dependencies(png_framework genfiles) + list(APPEND PNG_LIB_TARGETS png_framework) + set_target_properties(png_framework PROPERTIES + FRAMEWORK TRUE + FRAMEWORK_VERSION ${PNGLIB_VERSION} + MACOSX_FRAMEWORK_SHORT_VERSION_STRING ${PNGLIB_MAJOR}.${PNGLIB_MINOR} + MACOSX_FRAMEWORK_BUNDLE_VERSION ${PNGLIB_VERSION} + MACOSX_FRAMEWORK_IDENTIFIER org.libpng.libpng + XCODE_ATTRIBUTE_INSTALL_PATH "@rpath" + PUBLIC_HEADER "${libpng_public_hdrs}" + OUTPUT_NAME png) + target_link_libraries(png_framework ${ZLIB_LIBRARY} ${M_LIBRARY}) +endif() + +if(NOT PNG_LIB_TARGETS) + message(SEND_ERROR + "No library variant selected to build. " + "Please enable at least one of the following options: " + "PNG_STATIC, PNG_SHARED, PNG_FRAMEWORK") +endif() + +if(PNG_SHARED AND WIN32) + set_target_properties(png PROPERTIES DEFINE_SYMBOL PNG_BUILD_DLL) +endif() + +function(png_add_test) + set(options) + set(oneValueArgs NAME COMMAND) + set(multiValueArgs OPTIONS FILES) + cmake_parse_arguments(_PAT "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN}) + + if(NOT _PAT_NAME) + message(FATAL_ERROR "png_add_test: Missing NAME argument") + endif() + if(NOT _PAT_COMMAND) + message(FATAL_ERROR "png_add_test: Missing COMMAND argument") + endif() + + set(TEST_OPTIONS "${_PAT_OPTIONS}") + set(TEST_FILES "${_PAT_FILES}") + + configure_file("${CMAKE_CURRENT_SOURCE_DIR}/scripts/test.cmake.in" + "${CMAKE_CURRENT_BINARY_DIR}/tests/${_PAT_NAME}.cmake" @ONLY) + add_test(NAME "${_PAT_NAME}" + COMMAND "${CMAKE_COMMAND}" + "-DLIBPNG=$" + "-DTEST_COMMAND=$" + -P "${CMAKE_CURRENT_BINARY_DIR}/tests/${_PAT_NAME}.cmake") +endfunction() + +if(PNG_TESTS AND PNG_SHARED) + # Find test PNG files by globbing, but sort lists to ensure + # consistency between different filesystems. + file(GLOB PNGSUITE_PNGS "${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/*.png") + list(SORT PNGSUITE_PNGS) + file(GLOB TEST_PNGS "${CMAKE_CURRENT_SOURCE_DIR}/contrib/testpngs/*.png") + list(SORT TEST_PNGS) + + set(PNGTEST_PNG "${CMAKE_CURRENT_SOURCE_DIR}/pngtest.png") + + add_executable(pngtest ${pngtest_sources}) + target_link_libraries(pngtest png) + + png_add_test(NAME pngtest COMMAND pngtest FILES "${PNGTEST_PNG}") + + add_executable(pngvalid ${pngvalid_sources}) + target_link_libraries(pngvalid png) + + png_add_test(NAME pngvalid-gamma-16-to-8 + COMMAND pngvalid OPTIONS --gamma-16-to-8) + png_add_test(NAME pngvalid-gamma-alpha-mode + COMMAND pngvalid OPTIONS --gamma-alpha-mode) + png_add_test(NAME pngvalid-gamma-background + COMMAND pngvalid OPTIONS --gamma-background) + png_add_test(NAME pngvalid-gamma-expand16-alpha-mode + COMMAND pngvalid OPTIONS --gamma-alpha-mode --expand16) + png_add_test(NAME pngvalid-gamma-expand16-background + COMMAND pngvalid OPTIONS --gamma-background --expand16) + png_add_test(NAME pngvalid-gamma-expand16-transform + COMMAND pngvalid OPTIONS --gamma-transform --expand16) + png_add_test(NAME pngvalid-gamma-sbit + COMMAND pngvalid OPTIONS --gamma-sbit) + png_add_test(NAME pngvalid-gamma-threshold + COMMAND pngvalid OPTIONS --gamma-threshold) + png_add_test(NAME pngvalid-gamma-transform + COMMAND pngvalid OPTIONS --gamma-transform) + png_add_test(NAME pngvalid-progressive-interlace-standard + COMMAND pngvalid OPTIONS --standard --progressive-read --interlace) + png_add_test(NAME pngvalid-progressive-size + COMMAND pngvalid OPTIONS --size --progressive-read) + png_add_test(NAME pngvalid-progressive-standard + COMMAND pngvalid OPTIONS --standard --progressive-read) + png_add_test(NAME pngvalid-standard + COMMAND pngvalid OPTIONS --standard) + png_add_test(NAME pngvalid-transform + COMMAND pngvalid OPTIONS --transform) + + add_executable(pngstest ${pngstest_sources}) + target_link_libraries(pngstest png) + + foreach(gamma_type 1.8 linear none sRGB) + foreach(alpha_type none alpha) + set(PNGSTEST_FILES) + foreach(test_png ${TEST_PNGS}) + string(REGEX MATCH ".*-linear[-.].*" TEST_PNG_LINEAR "${test_png}") + string(REGEX MATCH ".*-sRGB[-.].*" TEST_PNG_SRGB "${test_png}") + string(REGEX MATCH ".*-1.8[-.].*" TEST_PNG_G18 "${test_png}") + string(REGEX MATCH ".*-alpha-.*" TEST_PNG_ALPHA "${test_png}") + + set(TEST_PNG_VALID TRUE) + + if(TEST_PNG_ALPHA) + if(NOT "${alpha_type}" STREQUAL "alpha") + set(TEST_PNG_VALID FALSE) + endif() + else() + if("${alpha_type}" STREQUAL "alpha") + set(TEST_PNG_VALID FALSE) + endif() + endif() + + if(TEST_PNG_LINEAR) + if(NOT "${gamma_type}" STREQUAL "linear") + set(TEST_PNG_VALID FALSE) + endif() + elseif(TEST_PNG_SRGB) + if(NOT "${gamma_type}" STREQUAL "sRGB") + set(TEST_PNG_VALID FALSE) + endif() + elseif(TEST_PNG_G18) + if(NOT "${gamma_type}" STREQUAL "1.8") + set(TEST_PNG_VALID FALSE) + endif() + else() + if(NOT "${gamma_type}" STREQUAL "none") + set(TEST_PNG_VALID FALSE) + endif() + endif() + + if(TEST_PNG_VALID) + list(APPEND PNGSTEST_FILES "${test_png}") + endif() + endforeach() + # Should already be sorted, but sort anyway to be certain. + list(SORT PNGSTEST_FILES) + png_add_test(NAME pngstest-${gamma_type}-${alpha_type} + COMMAND pngstest + OPTIONS --tmpfile "${gamma_type}-${alpha_type}-" --log + FILES ${PNGSTEST_FILES}) + endforeach() + endforeach() + + add_executable(pngunknown ${pngunknown_sources}) + target_link_libraries(pngunknown png) + + png_add_test(NAME pngunknown-discard COMMAND pngunknown OPTIONS --strict default=discard FILES "${PNGTEST_PNG}") + png_add_test(NAME pngunknown-IDAT COMMAND pngunknown OPTIONS --strict default=discard IDAT=save FILES "${PNGTEST_PNG}") + png_add_test(NAME pngunknown-if-safe COMMAND pngunknown OPTIONS --strict default=if-safe FILES "${PNGTEST_PNG}") + png_add_test(NAME pngunknown-sAPI COMMAND pngunknown OPTIONS --strict bKGD=save cHRM=save gAMA=save all=discard iCCP=save sBIT=save sRGB=save FILES "${PNGTEST_PNG}") + png_add_test(NAME pngunknown-save COMMAND pngunknown OPTIONS --strict default=save FILES "${PNGTEST_PNG}") + png_add_test(NAME pngunknown-sTER COMMAND pngunknown OPTIONS --strict sTER=if-safe FILES "${PNGTEST_PNG}") + png_add_test(NAME pngunknown-vpAg COMMAND pngunknown OPTIONS --strict vpAg=if-safe FILES "${PNGTEST_PNG}") + + add_executable(pngimage ${pngimage_sources}) + target_link_libraries(pngimage png) + + png_add_test(NAME pngimage-quick COMMAND pngimage OPTIONS --list-combos --log FILES ${PNGSUITE_PNGS}) + png_add_test(NAME pngimage-full COMMAND pngimage OPTIONS --exhaustive --list-combos --log FILES ${PNGSUITE_PNGS}) +endif() + +if(PNG_SHARED) + add_executable(pngfix ${pngfix_sources}) + target_link_libraries(pngfix png) + set(PNG_BIN_TARGETS pngfix) + + add_executable(png-fix-itxt ${png_fix_itxt_sources}) + target_link_libraries(png-fix-itxt ${ZLIB_LIBRARY} ${M_LIBRARY}) + list(APPEND PNG_BIN_TARGETS png-fix-itxt) +endif() + +# Set a variable with CMake code which: +# Creates a symlink from src to dest (if possible) or alternatively +# copies if different. +include(CMakeParseArguments) + +function(create_symlink DEST_FILE) + + cmake_parse_arguments(S "" "FILE;TARGET" "" ${ARGN}) + + if(NOT S_TARGET AND NOT S_FILE) + message(FATAL_ERROR "create_symlink: Missing TARGET or FILE argument") + endif() + + if(S_TARGET AND S_FILE) + message(FATAL_ERROR "create_symlink: Both source file ${S_FILE} and build target ${S_TARGET} arguments are present; can only have one.") + endif() + + if(S_FILE) + # If we don't need to symlink something that's coming from a build target, + # we can go ahead and symlink/copy at configure time. + if(CMAKE_HOST_WIN32 AND NOT CYGWIN) + execute_process( + COMMAND "${CMAKE_COMMAND}" -E copy_if_different ${S_FILE} ${DEST_FILE} + WORKING_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}") + else() + execute_process( + COMMAND ${CMAKE_COMMAND} -E create_symlink ${S_FILE} ${DEST_FILE} + WORKING_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}") + endif() + endif() + + if(S_TARGET) + # We need to use generator expressions, which can be a bit tricky, so for + # simplicity make the symlink a POST_BUILD step and use the TARGET + # signature of add_custom_command. + if(CMAKE_HOST_WIN32 AND NOT CYGWIN) + add_custom_command(TARGET ${S_TARGET} POST_BUILD + COMMAND "${CMAKE_COMMAND}" -E copy_if_different $ $/${DEST_FILE}) + else() + add_custom_command(TARGET ${S_TARGET} POST_BUILD + COMMAND "${CMAKE_COMMAND}" -E create_symlink $ $/${DEST_FILE}) + endif() + endif() + +endfunction() + +# Create source generation scripts. +configure_file(${CMAKE_CURRENT_SOURCE_DIR}/scripts/genchk.cmake.in + ${CMAKE_CURRENT_BINARY_DIR}/scripts/genchk.cmake @ONLY) +configure_file(${CMAKE_CURRENT_SOURCE_DIR}/scripts/genout.cmake.in + ${CMAKE_CURRENT_BINARY_DIR}/scripts/genout.cmake @ONLY) +configure_file(${CMAKE_CURRENT_SOURCE_DIR}/scripts/gensrc.cmake.in + ${CMAKE_CURRENT_BINARY_DIR}/scripts/gensrc.cmake @ONLY) + +# libpng is a library so default to 'lib' +if(NOT DEFINED CMAKE_INSTALL_LIBDIR) + set(CMAKE_INSTALL_LIBDIR lib) +endif() + +# CREATE PKGCONFIG FILES +# We use the same files like ./configure, so we have to set its vars. +# Only do this on Windows for Cygwin - the files don't make much sense outside +# of a UNIX look-alike. +if(NOT WIN32 OR CYGWIN OR MINGW) + set(prefix ${CMAKE_INSTALL_PREFIX}) + set(exec_prefix ${CMAKE_INSTALL_PREFIX}) + set(libdir ${CMAKE_INSTALL_FULL_LIBDIR}) + set(includedir ${CMAKE_INSTALL_FULL_INCLUDEDIR}) + set(LIBS "-lz -lm") + configure_file(${CMAKE_CURRENT_SOURCE_DIR}/libpng.pc.in + ${CMAKE_CURRENT_BINARY_DIR}/${PNGLIB_NAME}.pc @ONLY) + create_symlink(libpng.pc FILE ${PNGLIB_NAME}.pc) + + configure_file(${CMAKE_CURRENT_SOURCE_DIR}/libpng-config.in + ${CMAKE_CURRENT_BINARY_DIR}/${PNGLIB_NAME}-config @ONLY) + create_symlink(libpng-config FILE ${PNGLIB_NAME}-config) +endif() + +# SET UP LINKS +if(PNG_SHARED) + set_target_properties(png PROPERTIES +# VERSION 16.${PNGLIB_RELEASE}.1.6.37 + VERSION 16.${PNGLIB_RELEASE}.0 + SOVERSION 16 + CLEAN_DIRECT_OUTPUT 1) +endif() + +# INSTALL +if(NOT SKIP_INSTALL_LIBRARIES AND NOT SKIP_INSTALL_ALL) + install(TARGETS ${PNG_LIB_TARGETS} + EXPORT libpng + RUNTIME DESTINATION bin + LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR} + ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR} + FRAMEWORK DESTINATION ${CMAKE_INSTALL_LIBDIR}) + + if(PNG_SHARED) + # Create a symlink for libpng.dll.a => libpng16.dll.a on Cygwin + if(CYGWIN OR MINGW) + create_symlink(libpng${CMAKE_IMPORT_LIBRARY_SUFFIX} TARGET png) + install(FILES $/libpng${CMAKE_IMPORT_LIBRARY_SUFFIX} + DESTINATION ${CMAKE_INSTALL_LIBDIR}) + endif() + + if(NOT WIN32) + create_symlink(libpng${CMAKE_SHARED_LIBRARY_SUFFIX} TARGET png) + install(FILES $/libpng${CMAKE_SHARED_LIBRARY_SUFFIX} + DESTINATION ${CMAKE_INSTALL_LIBDIR}) + endif() + endif() + + if(PNG_STATIC) + if(NOT WIN32 OR CYGWIN OR MINGW) + create_symlink(libpng${CMAKE_STATIC_LIBRARY_SUFFIX} TARGET png_static) + install(FILES $/libpng${CMAKE_STATIC_LIBRARY_SUFFIX} + DESTINATION ${CMAKE_INSTALL_LIBDIR}) + endif() + endif() +endif() + +if(NOT SKIP_INSTALL_HEADERS AND NOT SKIP_INSTALL_ALL) + install(FILES ${libpng_public_hdrs} DESTINATION include) + install(FILES ${libpng_public_hdrs} DESTINATION include/${PNGLIB_NAME}) +endif() +if(NOT SKIP_INSTALL_EXECUTABLES AND NOT SKIP_INSTALL_ALL) + if(NOT WIN32 OR CYGWIN OR MINGW) + install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/libpng-config DESTINATION bin) + install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/${PNGLIB_NAME}-config DESTINATION bin) + endif() +endif() + +if(NOT SKIP_INSTALL_PROGRAMS AND NOT SKIP_INSTALL_ALL) + install(TARGETS ${PNG_BIN_TARGETS} + RUNTIME DESTINATION bin) +endif() + +if(NOT SKIP_INSTALL_FILES AND NOT SKIP_INSTALL_ALL) + # Install man pages + if(NOT PNG_MAN_DIR) + set(PNG_MAN_DIR "share/man") + endif() + install(FILES libpng.3 libpngpf.3 DESTINATION ${PNG_MAN_DIR}/man3) + install(FILES png.5 DESTINATION ${PNG_MAN_DIR}/man5) + # Install pkg-config files + if(NOT CMAKE_HOST_WIN32 OR CYGWIN OR MINGW) + install(FILES ${CMAKE_CURRENT_BINARY_DIR}/libpng.pc + DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig) + install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/libpng-config + DESTINATION bin) + install(FILES ${CMAKE_CURRENT_BINARY_DIR}/${PNGLIB_NAME}.pc + DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig) + install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/${PNGLIB_NAME}-config + DESTINATION bin) + endif() +endif() + +# Create an export file that CMake users can include() to import our targets. +if(NOT SKIP_INSTALL_EXPORT AND NOT SKIP_INSTALL_ALL) + install(EXPORT libpng DESTINATION lib/libpng FILE lib${PNG_LIB_NAME}.cmake) +endif() + +# what's with libpng-manual.txt and all the extra files? + +# UNINSTALL +# do we need this? + +# DIST +# do we need this? + +# to create msvc import lib for mingw compiled shared lib +# pexports libpng.dll > libpng.def +# lib /def:libpng.def /machine:x86 diff --git a/extern/libpng/INSTALL b/extern/libpng/INSTALL new file mode 100644 index 0000000000..4c17022515 --- /dev/null +++ b/extern/libpng/INSTALL @@ -0,0 +1,465 @@ + + Installing libpng + +Contents + + I. Simple installation + II. Rebuilding the configure scripts + III. Using scripts/makefile* + IV. Using cmake + V. Directory structure + VI. Building with project files + VII. Building with makefiles + VIII. Configuring libpng for 16-bit platforms + IX. Configuring for DOS + X. Configuring for Medium Model + XI. Prepending a prefix to exported symbols + XII. Configuring for compiler xxx: + XIII. Removing unwanted object code + XIV. Enabling or disabling hardware optimizations + XV. Changes to the build and configuration of libpng in libpng-1.5.x + XVI. Setjmp/longjmp issues + XVII. Common linking failures + XVIII. Other sources of information about libpng + +I. Simple installation + +On Unix/Linux and similar systems, you can simply type + + ./configure [--prefix=/path] + make check + make install + +and ignore the rest of this document. "/path" is the path to the directory +where you want to install the libpng "lib", "include", and "bin" +subdirectories. + +If you downloaded a GIT clone, you will need to run ./autogen.sh before +running ./configure, to create "configure" and "Makefile.in" which are +not included in the GIT repository. + +Note that "configure" is only included in the "*.tar" distributions and not +in the "*.zip" or "*.7z" distributions. If you downloaded one of those +distributions, see "Building with project files" or "Building with makefiles", +below. + +II. Rebuilding the configure scripts + +If configure does not work on your system, or if you have a need to +change configure.ac or Makefile.am, and you have a reasonably +up-to-date set of tools, running ./autogen.sh in a git clone before +running ./configure may fix the problem. To be really sure that you +aren't using any of the included pre-built scripts, especially if you +are building from a tar distribution instead of a git distribution, +do this: + + ./configure --enable-maintainer-mode + make maintainer-clean + ./autogen.sh --maintainer --clean + ./autogen.sh --maintainer + ./configure [--prefix=/path] [other options] + make + make install + make check + +III. Using scripts/makefile* + +Instead, you can use one of the custom-built makefiles in the +"scripts" directory + + cp scripts/pnglibconf.h.prebuilt pnglibconf.h + cp scripts/makefile.system makefile + make test + make install + +The files that are presently available in the scripts directory +are listed and described in scripts/README.txt. + +Or you can use one of the "projects" in the "projects" directory. + +Before installing libpng, you must first install zlib, if it +is not already on your system. zlib can usually be found +wherever you got libpng; otherwise go to https://zlib.net/. You can +place zlib in the same directory as libpng or in another directory. + +If your system already has a preinstalled zlib you will still need +to have access to the zlib.h and zconf.h include files that +correspond to the version of zlib that's installed. + +If you wish to test with a particular zlib that is not first in the +standard library search path, put ZLIBLIB, ZLIBINC, CPPFLAGS, LDFLAGS, +and LD_LIBRARY_PATH in your environment before running "make test" +or "make distcheck": + + ZLIBLIB=/path/to/lib export ZLIBLIB + ZLIBINC=/path/to/include export ZLIBINC + CPPFLAGS="-I$ZLIBINC" export CPPFLAGS + LDFLAGS="-L$ZLIBLIB" export LDFLAGS + LD_LIBRARY_PATH="$ZLIBLIB:$LD_LIBRARY_PATH" export LD_LIBRARY_PATH + +If you are using one of the makefile scripts, put ZLIBLIB and ZLIBINC +in your environment and type + + make ZLIBLIB=$ZLIBLIB ZLIBINC=$ZLIBINC test + +IV. Using cmake + +If you want to use "cmake" (see www.cmake.org), type + + cmake . -DCMAKE_INSTALL_PREFIX=/path + make + make install + +As when using the simple configure method described above, "/path" points to +the installation directory where you want to put the libpng "lib", "include", +and "bin" subdirectories. + +V. Directory structure + +You can rename the directories that you downloaded (they +might be called "libpng-x.y.z" or "libpngNN" and "zlib-1.2.8" +or "zlib128") so that you have directories called "zlib" and "libpng". + +Your directory structure should look like this: + + .. (the parent directory) + libpng (this directory) + INSTALL (this file) + README + *.h, *.c => libpng source files + CMakeLists.txt => "cmake" script + configuration files: + configure.ac, configure, Makefile.am, Makefile.in, + autogen.sh, config.guess, ltmain.sh, missing, libpng.pc.in, + libpng-config.in, aclocal.m4, config.h.in, config.sub, + depcomp, install-sh, mkinstalldirs, test-pngtest.sh + contrib + arm-neon, conftest, examples, gregbook, libtests, pngminim, + pngminus, pngsuite, tools, visupng + projects + cbuilder5, owatcom, visualc71, vstudio, xcode + scripts + makefile.* + *.def (module definition files) + etc. + pngtest.png + etc. + zlib + README, *.h, *.c contrib, etc. + +If the line endings in the files look funny, you may wish to get the other +distribution of libpng. It is available in both tar.gz (UNIX style line +endings) and zip (DOS style line endings) formats. + +VI. Building with project files + +If you are building libpng with MSVC, you can enter the +libpng projects\visualc71 or vstudio directory and follow the instructions +in README.txt. + +Otherwise enter the zlib directory and follow the instructions in zlib/README, +then come back here and run "configure" or choose the appropriate +makefile.sys in the scripts directory. + +VII. Building with makefiles + +Copy the file (or files) that you need from the +scripts directory into this directory, for example + +MSDOS example: + + copy scripts\makefile.msc makefile + copy scripts\pnglibconf.h.prebuilt pnglibconf.h + +UNIX example: + + cp scripts/makefile.std makefile + cp scripts/pnglibconf.h.prebuilt pnglibconf.h + +Read the makefile to see if you need to change any source or +target directories to match your preferences. + +Then read pnglibconf.dfa to see if you want to make any configuration +changes. + +Then just run "make" which will create the libpng library in +this directory and "make test" which will run a quick test that reads +the "pngtest.png" file and writes a "pngout.png" file that should be +identical to it. Look for "9782 zero samples" in the output of the +test. For more confidence, you can run another test by typing +"pngtest pngnow.png" and looking for "289 zero samples" in the output. +Also, you can run "pngtest -m contrib/pngsuite/*.png" and compare +your output with the result shown in contrib/pngsuite/README. + +Most of the makefiles will allow you to run "make install" to +put the library in its final resting place (if you want to +do that, run "make install" in the zlib directory first if necessary). +Some also allow you to run "make test-installed" after you have +run "make install". + +VIII. Configuring libpng for 16-bit platforms + +You will want to look into zconf.h to tell zlib (and thus libpng) that +it cannot allocate more than 64K at a time. Even if you can, the memory +won't be accessible. So limit zlib and libpng to 64K by defining MAXSEG_64K. + +IX. Configuring for DOS + +For DOS users who only have access to the lower 640K, you will +have to limit zlib's memory usage via a png_set_compression_mem_level() +call. See zlib.h or zconf.h in the zlib library for more information. + +X. Configuring for Medium Model + +Libpng's support for medium model has been tested on most of the popular +compilers. Make sure MAXSEG_64K gets defined, USE_FAR_KEYWORD gets +defined, and FAR gets defined to far in pngconf.h, and you should be +all set. Everything in the library (except for zlib's structure) is +expecting far data. You must use the typedefs with the p or pp on +the end for pointers (or at least look at them and be careful). Make +note that the rows of data are defined as png_bytepp, which is +an "unsigned char far * far *". + +XI. Prepending a prefix to exported symbols + +Starting with libpng-1.6.0, you can configure libpng (when using the +"configure" script) to prefix all exported symbols by means of the +configuration option "--with-libpng-prefix=FOO_", where FOO_ can be any +string beginning with a letter and containing only uppercase +and lowercase letters, digits, and the underscore (i.e., a C language +identifier). This creates a set of macros in pnglibconf.h, so this is +transparent to applications; their function calls get transformed by +the macros to use the modified names. + +XII. Configuring for compiler xxx: + +All includes for libpng are in pngconf.h. If you need to add, change +or delete an include, this is the place to do it. +The includes that are not needed outside libpng are placed in pngpriv.h, +which is only used by the routines inside libpng itself. +The files in libpng proper only include pngpriv.h and png.h, which +in turn includes pngconf.h and, as of libpng-1.5.0, pnglibconf.h. +As of libpng-1.5.0, pngpriv.h also includes three other private header +files, pngstruct.h, pnginfo.h, and pngdebug.h, which contain material +that previously appeared in the public headers. + +XIII. Removing unwanted object code + +There are a bunch of #define's in pngconf.h that control what parts of +libpng are compiled. All the defines end in _SUPPORTED. If you are +never going to use a capability, you can change the #define to #undef +before recompiling libpng and save yourself code and data space, or +you can turn off individual capabilities with defines that begin with +"PNG_NO_". + +In libpng-1.5.0 and later, the #define's are in pnglibconf.h instead. + +You can also turn all of the transforms and ancillary chunk capabilities +off en masse with compiler directives that define +PNG_NO_READ[or WRITE]_TRANSFORMS, or PNG_NO_READ[or WRITE]_ANCILLARY_CHUNKS, +or all four, along with directives to turn on any of the capabilities that +you do want. The PNG_NO_READ[or WRITE]_TRANSFORMS directives disable the +extra transformations but still leave the library fully capable of reading +and writing PNG files with all known public chunks. Use of the +PNG_NO_READ[or WRITE]_ANCILLARY_CHUNKS directive produces a library +that is incapable of reading or writing ancillary chunks. If you are +not using the progressive reading capability, you can turn that off +with PNG_NO_PROGRESSIVE_READ (don't confuse this with the INTERLACING +capability, which you'll still have). + +All the reading and writing specific code are in separate files, so the +linker should only grab the files it needs. However, if you want to +make sure, or if you are building a stand alone library, all the +reading files start with "pngr" and all the writing files start with "pngw". +The files that don't match either (like png.c, pngtrans.c, etc.) +are used for both reading and writing, and always need to be included. +The progressive reader is in pngpread.c + +If you are creating or distributing a dynamically linked library (a .so +or DLL file), you should not remove or disable any parts of the library, +as this will cause applications linked with different versions of the +library to fail if they call functions not available in your library. +The size of the library itself should not be an issue, because only +those sections that are actually used will be loaded into memory. + +XIV. Enabling or disabling hardware optimizations + +Certain hardware capabilities, such as the Intel SSE instructions, +are normally detected at run time. Enable them with configure options +such as one of + + --enable-arm-neon=yes + --enable-mips-msa=yes + --enable-intel-sse=yes + --enable-powerpc-vsx=yes + +or enable them all at once with + + --enable-hardware-optimizations=yes + +or, if you are not using "configure", you can use one +or more of + + CPPFLAGS += "-DPNG_ARM_NEON" + CPPFLAGS += "-DPNG_MIPS_MSA" + CPPFLAGS += "-DPNG_INTEL_SSE" + CPPFLAGS += "-DPNG_POWERPC_VSX" + +See for example scripts/makefile.linux-opt + +If you wish to avoid using them, +you can disable them via the configure option + + --disable-hardware-optimizations + +to disable them all, or + + --enable-intel-sse=no + +to disable a particular one, +or via compiler-command options such as + + CPPFLAGS += "-DPNG_ARM_NEON_OPT=0, -DPNG_MIPS_MSA_OPT=0, + -DPNG_INTEL_SSE_OPT=0, -DPNG_POWERPC_VSX_OPT=0" + +If you are using cmake, hardware optimizations are "on" +by default. To disable them, use + + cmake . -DPNG_ARM_NEON=no -DPNG_INTEL_SSE=no \ + -DPNG_MIPS_MSA=no -DPNG_POWERPC_VSX=no + +or disable them all at once with + + cmake . -DPNG_HARDWARE_OPTIMIZATIONS=no + +XV. Changes to the build and configuration of libpng in libpng-1.5.x + +Details of internal changes to the library code can be found in the CHANGES +file and in the GIT repository logs. These will be of no concern to the vast +majority of library users or builders; however, the few who configure libpng +to a non-default feature set may need to change how this is done. + +There should be no need for library builders to alter build scripts if +these use the distributed build support - configure or the makefiles - +however, users of the makefiles may care to update their build scripts +to build pnglibconf.h where the corresponding makefile does not do so. + +Building libpng with a non-default configuration has changed completely. +The old method using pngusr.h should still work correctly even though the +way pngusr.h is used in the build has been changed; however, library +builders will probably want to examine the changes to take advantage of +new capabilities and to simplify their build system. + +A. Specific changes to library configuration capabilities + +The exact mechanism used to control attributes of API functions has +changed. A single set of operating system independent macro definitions +is used and operating system specific directives are defined in +pnglibconf.h + +As part of this the mechanism used to choose procedure call standards on +those systems that allow a choice has been changed. At present this only +affects certain Microsoft (DOS, Windows) and IBM (OS/2) operating systems +running on Intel processors. As before, PNGAPI is defined where required +to control the exported API functions; however, two new macros, PNGCBAPI +and PNGCAPI, are used instead for callback functions (PNGCBAPI) and +(PNGCAPI) for functions that must match a C library prototype (currently +only png_longjmp_ptr, which must match the C longjmp function.) The new +approach is documented in pngconf.h + +Despite these changes, libpng 1.5.0 only supports the native C function +calling standard on those platforms tested so far ("__cdecl" on Microsoft +Windows). This is because the support requirements for alternative +calling conventions seem to no longer exist. Developers who find it +necessary to set PNG_API_RULE to 1 should advise the mailing list +(png-mng-implement) of this and library builders who use Openwatcom and +therefore set PNG_API_RULE to 2 should also contact the mailing list. + +B. Changes to the configuration mechanism + +Prior to libpng-1.5.0 library builders who needed to configure libpng +had either to modify the exported pngconf.h header file to add system +specific configuration or had to write feature selection macros into +pngusr.h and cause this to be included into pngconf.h by defining +PNG_USER_CONFIG. The latter mechanism had the disadvantage that an +application built without PNG_USER_CONFIG defined would see the +unmodified, default, libpng API and thus would probably fail to link. + +These mechanisms still work in the configure build and in any makefile +build that builds pnglibconf.h, although the feature selection macros +have changed somewhat as described above. In 1.5.0, however, pngusr.h is +processed only once, at the time the exported header file pnglibconf.h is +built. pngconf.h no longer includes pngusr.h; therefore, pngusr.h is ignored +after the build of pnglibconf.h and it is never included in an application +build. + +The formerly used alternative of adding a list of feature macros to the +CPPFLAGS setting in the build also still works; however, the macros will be +copied to pnglibconf.h and this may produce macro redefinition warnings +when the individual C files are compiled. + +All configuration now only works if pnglibconf.h is built from +scripts/pnglibconf.dfa. This requires the program awk. Brian Kernighan +(the original author of awk) maintains C source code of that awk and this +and all known later implementations (often called by subtly different +names - nawk and gawk for example) are adequate to build pnglibconf.h. +The Sun Microsystems (now Oracle) program 'awk' is an earlier version +and does not work; this may also apply to other systems that have a +functioning awk called 'nawk'. + +Configuration options are now documented in scripts/pnglibconf.dfa. This +file also includes dependency information that ensures a configuration is +consistent; that is, if a feature is switched off, dependent features are +also switched off. As a recommended alternative to using feature macros in +pngusr.h a system builder may also define equivalent options in pngusr.dfa +(or, indeed, any file) and add that to the configuration by setting +DFA_XTRA to the file name. The makefiles in contrib/pngminim illustrate +how to do this, and also illustrate a case where pngusr.h is still required. + +After you have built libpng, the definitions that were recorded in +pnglibconf.h are available to your application (pnglibconf.h is included +in png.h and gets installed alongside png.h and pngconf.h in your +$PREFIX/include directory). Do not edit pnglibconf.h after you have built +libpng, because than the settings would not accurately reflect the settings +that were used to build libpng. + +XVI. Setjmp/longjmp issues + +Libpng uses setjmp()/longjmp() for error handling. Unfortunately setjmp() +is known to be not thread-safe on some platforms and we don't know of +any platform where it is guaranteed to be thread-safe. Therefore, if +your application is going to be using multiple threads, you should +configure libpng with PNG_NO_SETJMP in your pngusr.dfa file, with +-DPNG_NO_SETJMP on your compile line, or with + + #undef PNG_SETJMP_SUPPORTED + +in your pnglibconf.h or pngusr.h. + +Starting with libpng-1.6.0, the library included a "simplified API". +This requires setjmp/longjmp, so you must either build the library +with PNG_SETJMP_SUPPORTED defined, or with PNG_SIMPLIFIED_READ_SUPPORTED +and PNG_SIMPLIFIED_WRITE_SUPPORTED undefined. + +XVII. Common linking failures + +If your application fails to find libpng or zlib entries while linking: + + Be sure "-lz" appears after "-lpng" on your linking command. + + Be sure you have built libpng, zlib, and your application for the + same platform (e.g., 32-bit or 64-bit). + + If you are using the vstudio project, observe the WARNING in + project/vstudio/README.txt. + +XVIII. Other sources of information about libpng: + +Further information can be found in the README and libpng-manual.txt +files, in the individual makefiles, in png.h, and the manual pages +libpng.3 and png.5. + +Copyright (c) 1998-2002,2006-2016 Glenn Randers-Pehrson +This document is released under the libpng license. +For conditions of distribution and use, see the disclaimer +and license in png.h. diff --git a/extern/libpng/LICENSE b/extern/libpng/LICENSE new file mode 100644 index 0000000000..e0c5b531cf --- /dev/null +++ b/extern/libpng/LICENSE @@ -0,0 +1,134 @@ +COPYRIGHT NOTICE, DISCLAIMER, and LICENSE +========================================= + +PNG Reference Library License version 2 +--------------------------------------- + + * Copyright (c) 1995-2019 The PNG Reference Library Authors. + * Copyright (c) 2018-2019 Cosmin Truta. + * Copyright (c) 2000-2002, 2004, 2006-2018 Glenn Randers-Pehrson. + * Copyright (c) 1996-1997 Andreas Dilger. + * Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc. + +The software is supplied "as is", without warranty of any kind, +express or implied, including, without limitation, the warranties +of merchantability, fitness for a particular purpose, title, and +non-infringement. In no event shall the Copyright owners, or +anyone distributing the software, be liable for any damages or +other liability, whether in contract, tort or otherwise, arising +from, out of, or in connection with the software, or the use or +other dealings in the software, even if advised of the possibility +of such damage. + +Permission is hereby granted to use, copy, modify, and distribute +this software, or portions hereof, for any purpose, without fee, +subject to the following restrictions: + + 1. The origin of this software must not be misrepresented; you + must not claim that you wrote the original software. If you + use this software in a product, an acknowledgment in the product + documentation would be appreciated, but is not required. + + 2. Altered source versions must be plainly marked as such, and must + not be misrepresented as being the original software. + + 3. This Copyright notice may not be removed or altered from any + source or altered source distribution. + + +PNG Reference Library License version 1 (for libpng 0.5 through 1.6.35) +----------------------------------------------------------------------- + +libpng versions 1.0.7, July 1, 2000, through 1.6.35, July 15, 2018 are +Copyright (c) 2000-2002, 2004, 2006-2018 Glenn Randers-Pehrson, are +derived from libpng-1.0.6, and are distributed according to the same +disclaimer and license as libpng-1.0.6 with the following individuals +added to the list of Contributing Authors: + + Simon-Pierre Cadieux + Eric S. Raymond + Mans Rullgard + Cosmin Truta + Gilles Vollant + James Yu + Mandar Sahastrabuddhe + Google Inc. + Vadim Barkov + +and with the following additions to the disclaimer: + + There is no warranty against interference with your enjoyment of + the library or against infringement. There is no warranty that our + efforts or the library will fulfill any of your particular purposes + or needs. This library is provided with all faults, and the entire + risk of satisfactory quality, performance, accuracy, and effort is + with the user. + +Some files in the "contrib" directory and some configure-generated +files that are distributed with libpng have other copyright owners, and +are released under other open source licenses. + +libpng versions 0.97, January 1998, through 1.0.6, March 20, 2000, are +Copyright (c) 1998-2000 Glenn Randers-Pehrson, are derived from +libpng-0.96, and are distributed according to the same disclaimer and +license as libpng-0.96, with the following individuals added to the +list of Contributing Authors: + + Tom Lane + Glenn Randers-Pehrson + Willem van Schaik + +libpng versions 0.89, June 1996, through 0.96, May 1997, are +Copyright (c) 1996-1997 Andreas Dilger, are derived from libpng-0.88, +and are distributed according to the same disclaimer and license as +libpng-0.88, with the following individuals added to the list of +Contributing Authors: + + John Bowler + Kevin Bracey + Sam Bushell + Magnus Holmgren + Greg Roelofs + Tom Tanner + +Some files in the "scripts" directory have other copyright owners, +but are released under this license. + +libpng versions 0.5, May 1995, through 0.88, January 1996, are +Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc. + +For the purposes of this copyright and license, "Contributing Authors" +is defined as the following set of individuals: + + Andreas Dilger + Dave Martindale + Guy Eric Schalnat + Paul Schmidt + Tim Wegner + +The PNG Reference Library is supplied "AS IS". The Contributing +Authors and Group 42, Inc. disclaim all warranties, expressed or +implied, including, without limitation, the warranties of +merchantability and of fitness for any purpose. The Contributing +Authors and Group 42, Inc. assume no liability for direct, indirect, +incidental, special, exemplary, or consequential damages, which may +result from the use of the PNG Reference Library, even if advised of +the possibility of such damage. + +Permission is hereby granted to use, copy, modify, and distribute this +source code, or portions hereof, for any purpose, without fee, subject +to the following restrictions: + + 1. The origin of this source code must not be misrepresented. + + 2. Altered versions must be plainly marked as such and must not + be misrepresented as being the original source. + + 3. This Copyright notice may not be removed or altered from any + source or altered source distribution. + +The Contributing Authors and Group 42, Inc. specifically permit, +without fee, and encourage the use of this source code as a component +to supporting the PNG file format in commercial products. If you use +this source code in a product, acknowledgment is not required but would +be appreciated. diff --git a/extern/libpng/Makefile.am b/extern/libpng/Makefile.am new file mode 100644 index 0000000000..4f621aa4d6 --- /dev/null +++ b/extern/libpng/Makefile.am @@ -0,0 +1,393 @@ +# Makefile.am, the source file for Makefile.in (and hence Makefile), is +# +# Copyright (c) 2018 Cosmin Truta +# Copyright (c) 2004-2016 Glenn Randers-Pehrson +# +# This code is released under the libpng license. +# For conditions of distribution and use, see the disclaimer +# and license in png.h + +PNGLIB_BASENAME= libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@ + +ACLOCAL_AMFLAGS = -I scripts + +# test programs - run on make check, make distcheck +check_PROGRAMS= pngtest pngunknown pngstest pngvalid pngimage pngcp +if HAVE_CLOCK_GETTIME +check_PROGRAMS += timepng +endif + +# Utilities - installed +bin_PROGRAMS= pngfix png-fix-itxt + +# This ensures that pnglibconf.h gets built at the start of 'make all' or +# 'make check', but it does not add dependencies to the individual programs, +# this is done below. +# +# IMPORTANT: always add the object modules of new programs to the list below +# because otherwise the sequence 'configure; make new-program' will *sometimes* +# result in the installed (system) pnglibconf.h being used and the result is +# always wrong and always very confusing. +BUILT_SOURCES = pnglibconf.h + +pngtest_SOURCES = pngtest.c +pngtest_LDADD = libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.la + +pngvalid_SOURCES = contrib/libtests/pngvalid.c +pngvalid_LDADD = libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.la + +pngstest_SOURCES = contrib/libtests/pngstest.c +pngstest_LDADD = libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.la + +pngunknown_SOURCES = contrib/libtests/pngunknown.c +pngunknown_LDADD = libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.la + +pngimage_SOURCES = contrib/libtests/pngimage.c +pngimage_LDADD = libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.la + +timepng_SOURCES = contrib/libtests/timepng.c +timepng_LDADD = libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.la + +pngfix_SOURCES = contrib/tools/pngfix.c +pngfix_LDADD = libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.la + +png_fix_itxt_SOURCES = contrib/tools/png-fix-itxt.c + +pngcp_SOURCES = contrib/tools/pngcp.c +pngcp_LDADD = libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.la + +# Generally these are single line shell scripts to run a test with a particular +# set of parameters: +TESTS =\ + tests/pngtest\ + tests/pngtest-badpngs\ + tests/pngvalid-gamma-16-to-8 tests/pngvalid-gamma-alpha-mode\ + tests/pngvalid-gamma-background tests/pngvalid-gamma-expand16-alpha-mode\ + tests/pngvalid-gamma-expand16-background\ + tests/pngvalid-gamma-expand16-transform tests/pngvalid-gamma-sbit\ + tests/pngvalid-gamma-threshold tests/pngvalid-gamma-transform\ + tests/pngvalid-progressive-size\ + tests/pngvalid-progressive-interlace-standard\ + tests/pngvalid-transform\ + tests/pngvalid-progressive-standard tests/pngvalid-standard\ + tests/pngstest-1.8 tests/pngstest-1.8-alpha tests/pngstest-linear\ + tests/pngstest-linear-alpha tests/pngstest-none tests/pngstest-none-alpha\ + tests/pngstest-sRGB tests/pngstest-sRGB-alpha tests/pngunknown-IDAT\ + tests/pngunknown-discard tests/pngunknown-if-safe tests/pngunknown-sAPI\ + tests/pngunknown-sTER tests/pngunknown-save tests/pngunknown-vpAg\ + tests/pngimage-quick tests/pngimage-full + +# man pages +dist_man_MANS= libpng.3 libpngpf.3 png.5 + +# generate the -config scripts if required +binconfigs= libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@-config +EXTRA_SCRIPTS= libpng-config libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@-config +bin_SCRIPTS= @binconfigs@ + +# rules to build libpng, only build the old library on request +lib_LTLIBRARIES=libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.la +# EXTRA_LTLIBRARIES= libpng.la +libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_SOURCES = png.c pngerror.c\ + pngget.c pngmem.c pngpread.c pngread.c pngrio.c pngrtran.c pngrutil.c\ + pngset.c pngtrans.c pngwio.c pngwrite.c pngwtran.c pngwutil.c\ + png.h pngconf.h pngdebug.h pnginfo.h pngpriv.h pngstruct.h pngusr.dfa + +if PNG_ARM_NEON +libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_SOURCES += arm/arm_init.c\ + arm/filter_neon.S arm/filter_neon_intrinsics.c \ + arm/palette_neon_intrinsics.c +endif + +if PNG_MIPS_MSA +libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_SOURCES += mips/mips_init.c\ + mips/filter_msa_intrinsics.c +endif + +if PNG_INTEL_SSE +libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_SOURCES += intel/intel_init.c\ + intel/filter_sse2_intrinsics.c +endif + +if PNG_POWERPC_VSX +libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_SOURCES += powerpc/powerpc_init.c\ + powerpc/filter_vsx_intrinsics.c +endif + +nodist_libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_SOURCES = pnglibconf.h + +libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_LDFLAGS = -no-undefined -export-dynamic \ + -version-number @PNGLIB_MAJOR@@PNGLIB_MINOR@:@PNGLIB_RELEASE@:0 + +if HAVE_LD_VERSION_SCRIPT +# Versioned symbols and restricted exports +if HAVE_SOLARIS_LD + libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_LDFLAGS += -Wl,-M -Wl,libpng.vers +else + libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_LDFLAGS += -Wl,--version-script=libpng.vers +endif + + libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_DEPENDENCIES = libpng.vers +else +# Only restricted exports when possible + libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_LDFLAGS += -export-symbols libpng.sym + libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_DEPENDENCIES = libpng.sym +endif + +#distribute headers in /usr/include/libpng/* +pkgincludedir= $(includedir)/$(PNGLIB_BASENAME) +pkginclude_HEADERS= png.h pngconf.h +nodist_pkginclude_HEADERS= pnglibconf.h + +# pkg-config stuff, note that libpng.pc is always required in order +# to get the correct library +pkgconfigdir = @pkgconfigdir@ +pkgconfig_DATA = libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.pc + +# Extra source distribution files, '${srcdir}' is used below to stop build files +# from those directories being included. This only works if the configure is +# not done in the source directory! +EXTRA_DIST= \ + ANNOUNCE AUTHORS CHANGES INSTALL LICENSE README TODO TRADEMARK \ + pngtest.png pngbar.png pngnow.png pngbar.jpg autogen.sh \ + ${srcdir}/contrib ${srcdir}/projects ${srcdir}/scripts \ + $(TESTS) $(XFAIL_TESTS) tests/pngstest \ + CMakeLists.txt example.c libpng-manual.txt + +SCRIPT_CLEANFILES=scripts/*.out scripts/*.chk + +CLEANFILES= *.tf? pngout.png libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.pc \ + libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@-config libpng.vers libpng.sym \ + check.new pnglibconf.h pngprefix.h symbols.new pngtest-log.txt \ + pnglibconf.out pnglibconf.c pnglibconf.pre pnglibconf.dfn \ + $(SCRIPT_CLEANFILES) + +MAINTAINERCLEANFILES = Makefile.in aclocal.m4 config.guess config.h.in \ +config.sub configure depcomp install-sh ltmain.sh missing + +# PNG_COPTS give extra options for the C compiler to be used on all compilation +# steps (unless targe_CFLAGS is specified; that will take precedence over +# AM_CFLAGS) +PNG_COPTS = @PNG_COPTS@ +AM_CFLAGS = ${PNG_COPTS} + +# DFNCPP is normally just CPP - the C preprocessor - but on Solaris and maybe +# other operating systems (NeXT?) the C preprocessor selected by configure +# checks input tokens for validity - effectively it performs part of the ANSI-C +# parsing - and therefore fails with the .df files. configure.ac has special +# checks for this and sets DFNCPP appropriately. +DFNCPP = @DFNCPP@ + +SUFFIXES = .chk .out + +$(PNGLIB_BASENAME).pc: libpng.pc + cp libpng.pc $@ + +$(PNGLIB_BASENAME)-config: libpng-config + cp libpng-config $@ + +scripts/sym.out scripts/vers.out: png.h pngconf.h pnglibconf.h +scripts/prefix.out: png.h pngconf.h pnglibconf.out +scripts/symbols.out: png.h pngconf.h $(srcdir)/scripts/pnglibconf.h.prebuilt +scripts/intprefix.out: pnglibconf.h + +libpng.sym: scripts/sym.out + rm -f $@ + cp $? $@ +libpng.vers: scripts/vers.out + rm -f $@ + cp $? $@ + +if DO_PNG_PREFIX +# Rename functions in scripts/prefix.out with a PNG_PREFIX prefix. +# Rename macros in scripts/macro.lst from PNG_PREFIXpng_ to PNG_ (the actual +# implementation of the macro). +pnglibconf.h: pnglibconf.out scripts/prefix.out scripts/macro.lst + rm -f $@ + $(AWK) 's==0 && NR>1{print prev}\ + s==0{prev=$$0}\ + s==1{print "#define", $$1, "@PNG_PREFIX@" $$1}\ + s==2{print "#define @PNG_PREFIX@png_" $$1, "PNG_" $$1}\ + END{print prev}' s=0 pnglibconf.out s=1 scripts/prefix.out\ + s=2 ${srcdir}/scripts/macro.lst >pnglibconf.tf8 + mv pnglibconf.tf8 $@ + +pngprefix.h: scripts/intprefix.out + rm -f pngprefix.tf1 + $(AWK) '{print "#define", $$1, "@PNG_PREFIX@" $$1}' $? >pngprefix.tf1 + mv pngprefix.tf1 $@ +else +pnglibconf.h: pnglibconf.out + rm -f $@ + cp $? $@ + +pngprefix.h: # is empty + :>$@ +endif + +$(srcdir)/scripts/pnglibconf.h.prebuilt: + @echo "Attempting to build $@" >&2 + @echo "This is a machine generated file, but if you want to make" >&2 + @echo "a new one simply make 'scripts/pnglibconf.out', copy that" >&2 + @echo "AND set PNG_ZLIB_VERNUM to 0 (you MUST do this)" >&2 + @exit 1 + +# The following is necessary to ensure that the local pnglibconf.h is used, not +# an installed one (this can happen immediately after on a clean system if +# 'make test' is the first thing the user does.) Only files which include +# one of the png source files (typically png.h or pngpriv.h) need to be listed +# here: +pngtest.o: pnglibconf.h + +contrib/libtests/makepng.o: pnglibconf.h +contrib/libtests/pngstest.o: pnglibconf.h +contrib/libtests/pngunknown.o: pnglibconf.h +contrib/libtests/pngimage.o: pnglibconf.h +contrib/libtests/pngvalid.o: pnglibconf.h +contrib/libtests/readpng.o: pnglibconf.h +contrib/libtests/tarith.o: pnglibconf.h +contrib/libtests/timepng.o: pnglibconf.h + +contrib/tools/makesRGB.o: pnglibconf.h +contrib/tools/pngfix.o: pnglibconf.h +contrib/tools/pngcp.o: pnglibconf.h + +# We must use -DPNG_NO_USE_READ_MACROS here even when the library may actually +# be built with PNG_USE_READ_MACROS; this prevents the read macros from +# interfering with the symbol file format. +SYMBOL_CFLAGS = -DPNGLIB_LIBNAME='PNG@PNGLIB_MAJOR@@PNGLIB_MINOR@_0'\ + -DPNGLIB_VERSION='@PNGLIB_VERSION@'\ + -DSYMBOL_PREFIX='$(SYMBOL_PREFIX)'\ + -DPNG_NO_USE_READ_MACROS -DPNG_BUILDING_SYMBOL_TABLE + +if DO_PNG_PREFIX +SYMBOL_CFLAGS += -DPNG_PREFIX='@PNG_PREFIX@' +endif + +.c.out: + rm -f $@ $*.tf[12] + test -d scripts || mkdir scripts || test -d scripts + $(DFNCPP) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES)\ + $(CPPFLAGS) $(SYMBOL_CFLAGS) $< > $*.tf1 + $(AWK) -f "${srcdir}/scripts/dfn.awk" out="$*.tf2" $*.tf1 1>&2 + rm -f $*.tf1 + mv $*.tf2 $@ + +# The .c file for pnglibconf.h is machine generated +pnglibconf.c: scripts/pnglibconf.dfa scripts/options.awk pngconf.h pngusr.dfa $(DFA_XTRA) + rm -f $@ $*.tf[45] + $(AWK) -f ${srcdir}/scripts/options.awk out=$*.tf4 version=search\ + ${srcdir}/pngconf.h ${srcdir}/scripts/pnglibconf.dfa\ + ${srcdir}/pngusr.dfa $(DFA_XTRA) 1>&2 + $(AWK) -f ${srcdir}/scripts/options.awk out=$*.tf5 $*.tf4 1>&2 + rm $*.tf4 + mv $*.tf5 $@ + +# Symbol checks (.def and .out files should match) +scripts/symbols.chk: scripts/checksym.awk scripts/symbols.def scripts/symbols.out + +.out.chk: + rm -f $@ $*.new + $(AWK) -f ${srcdir}/scripts/checksym.awk ${srcdir}/scripts/${*F}.def\ + of="$*.new" $< >&2 + mv $*.new $@ + +# used on demand to regenerate the standard header, CPPFLAGS should +# be empty - no non-standard defines +scripts/pnglibconf.c: scripts/pnglibconf.dfa scripts/options.awk pngconf.h + rm -f $@ pnglibconf.tf[67] + test -z "$(CPPFLAGS)" + echo "com @PNGLIB_VERSION@ STANDARD API DEFINITION" |\ + $(AWK) -f ${srcdir}/scripts/options.awk out=pnglibconf.tf6\ + logunsupported=1 version=search ${srcdir}/pngconf.h -\ + ${srcdir}/scripts/pnglibconf.dfa 1>&2 + $(AWK) -f ${srcdir}/scripts/options.awk out=pnglibconf.tf7\ + pnglibconf.tf6 1>&2 + rm pnglibconf.tf6 + mv pnglibconf.tf7 $@ + +$(libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_OBJECTS): png.h pngconf.h \ + pnglibconf.h pngpriv.h pngdebug.h pnginfo.h pngstruct.h pngprefix.h + +test: check-am + +# Extra checks +check: scripts/symbols.chk + +# Don't distribute the generated script files +dist-hook: + cd '$(top_distdir)'; rm -f $(SCRIPT_CLEANFILES) + +# Make links between installed files with release-specific names and the generic +# file names. If this install rule is run the generic names will be deleted and +# recreated - this has obvious issues for systems with multiple installations. + +install-header-links: + @set -ex; cd '$(DESTDIR)$(includedir)'; for f in $(HEADERS); do \ + rm -f "$$f"; $(LN_S) "$(PNGLIB_BASENAME)/$$f" "$$f"; done + +uninstall-header-links: + cd '$(DESTDIR)$(includedir)'; rm -f $(HEADERS) + +install-libpng-pc: + @set -ex; cd '$(DESTDIR)$(pkgconfigdir)'; rm -f libpng.pc; \ + $(LN_S) '$(PNGLIB_BASENAME).pc' libpng.pc + +uninstall-libpng-pc: + rm -f '$(DESTDIR)$(pkgconfigdir)/libpng.pc' + +# EXT_LIST is a list of the possibly library directory extensions, this exists +# because we can't find a good way of discovering the file extensions that are +# actually installed on a given system, so instead we check for every extension +# we have seen. + +EXT_LIST = a dll.a so so.@PNGLIB_MAJOR@@PNGLIB_MINOR@.@PNGLIB_RELEASE@ la sl dylib + +install-library-links: + @set -x; cd '$(DESTDIR)$(libdir)';\ + for ext in $(EXT_LIST); do\ + rm -f "libpng.$$ext";\ + if test -f "$(PNGLIB_BASENAME).$$ext"; then\ + $(LN_S) "$(PNGLIB_BASENAME).$$ext" "libpng.$$ext" || exit 1;\ + fi;\ + done + +uninstall-library-links: + @set -x; cd '$(DESTDIR)$(libdir)'; for ext in $(EXT_LIST); do\ + rm -f "libpng.$$ext"; done + +install-libpng-config: + @set -ex; cd '$(DESTDIR)$(bindir)'; rm -f libpng-config; \ + $(LN_S) '$(PNGLIB_BASENAME)-config' libpng-config + +uninstall-libpng-config: + rm -f '$(DESTDIR)$(bindir)/libpng-config' + +if DO_INSTALL_LINKS +# If --enable-unversioned-links is specified the header and lib file links +# will be automatically made on a 'make install': + +install-data-hook: install-header-links +uninstall-hook: uninstall-header-links +install-exec-hook: install-library-links +uninstall-hook: uninstall-library-links +endif + +if DO_INSTALL_LIBPNG_PC +# Likewise, --install-pc causes libpng.pc to be constructed: + +install-data-hook: install-libpng-pc +uninstall-hook: uninstall-libpng-pc +endif + +if DO_INSTALL_LIBPNG_CONFIG +# And --install-config: + +install-exec-hook: install-libpng-config +uninstall-hook: uninstall-libpng-config +endif + +# The following addition ensures that 'make all' always builds the test programs +# too. It used to, but some change either in libpng or configure stopped this +# working. +all-am: $(check_PROGRAMS) diff --git a/extern/libpng/Makefile.in b/extern/libpng/Makefile.in new file mode 100644 index 0000000000..81ac1c8552 --- /dev/null +++ b/extern/libpng/Makefile.in @@ -0,0 +1,2428 @@ +# Makefile.in generated by automake 1.16.1 from Makefile.am. +# @configure_input@ + +# Copyright (C) 1994-2018 Free Software Foundation, Inc. + +# This Makefile.in is free software; the Free Software Foundation +# gives unlimited permission to copy and/or distribute it, +# with or without modifications, as long as this notice is preserved. + +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY, to the extent permitted by law; without +# even the implied warranty of MERCHANTABILITY or FITNESS FOR A +# PARTICULAR PURPOSE. + +@SET_MAKE@ + +# Makefile.am, the source file for Makefile.in (and hence Makefile), is +# +# Copyright (c) 2018 Cosmin Truta +# Copyright (c) 2004-2016 Glenn Randers-Pehrson +# +# This code is released under the libpng license. +# For conditions of distribution and use, see the disclaimer +# and license in png.h + + + + + +VPATH = @srcdir@ +am__is_gnu_make = { \ + if test -z '$(MAKELEVEL)'; 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then \ + find "$(distdir)" -type d ! -perm -200 -exec chmod u+w {} ';' \ + && rm -rf "$(distdir)" \ + || { sleep 5 && rm -rf "$(distdir)"; }; \ + else :; fi +am__post_remove_distdir = $(am__remove_distdir) +DIST_ARCHIVES = $(distdir).tar.gz $(distdir).tar.xz +GZIP_ENV = --best +DIST_TARGETS = dist-xz dist-gzip +distuninstallcheck_listfiles = find . -type f -print +am__distuninstallcheck_listfiles = $(distuninstallcheck_listfiles) \ + | sed 's|^\./|$(prefix)/|' | grep -v '$(infodir)/dir$$' +distcleancheck_listfiles = find . -type f -print + +#distribute headers in /usr/include/libpng/* +pkgincludedir = $(includedir)/$(PNGLIB_BASENAME) +ACLOCAL = @ACLOCAL@ +AMTAR = @AMTAR@ +AM_DEFAULT_VERBOSITY = @AM_DEFAULT_VERBOSITY@ +AR = @AR@ +AS = @AS@ +AUTOCONF = @AUTOCONF@ +AUTOHEADER = @AUTOHEADER@ +AUTOMAKE = @AUTOMAKE@ +AWK = @AWK@ +CC = @CC@ +CCAS = @CCAS@ +CCASDEPMODE = @CCASDEPMODE@ +CCASFLAGS = @CCASFLAGS@ +CCDEPMODE = @CCDEPMODE@ +CFLAGS = @CFLAGS@ +CPP = @CPP@ +CPPFLAGS = @CPPFLAGS@ +CYGPATH_W = @CYGPATH_W@ +DEFS = @DEFS@ +DEPDIR = @DEPDIR@ + +# DFNCPP is normally just CPP - the C preprocessor - but on Solaris and maybe +# other operating systems (NeXT?) the C preprocessor selected by configure +# checks input tokens for validity - effectively it performs part of the ANSI-C +# parsing - and therefore fails with the .df files. configure.ac has special +# checks for this and sets DFNCPP appropriately. +DFNCPP = @DFNCPP@ +DLLTOOL = @DLLTOOL@ +DSYMUTIL = @DSYMUTIL@ +DUMPBIN = @DUMPBIN@ +ECHO_C = @ECHO_C@ +ECHO_N = @ECHO_N@ +ECHO_T = @ECHO_T@ +EGREP = @EGREP@ +EXEEXT = @EXEEXT@ +FGREP = @FGREP@ +GREP = @GREP@ +INSTALL = @INSTALL@ +INSTALL_DATA = @INSTALL_DATA@ +INSTALL_PROGRAM = @INSTALL_PROGRAM@ +INSTALL_SCRIPT = @INSTALL_SCRIPT@ +INSTALL_STRIP_PROGRAM = @INSTALL_STRIP_PROGRAM@ +LD = @LD@ +LDFLAGS = @LDFLAGS@ +LIBOBJS = @LIBOBJS@ +LIBS = @LIBS@ +LIBTOOL = @LIBTOOL@ +LIPO = @LIPO@ +LN_S = @LN_S@ +LTLIBOBJS = @LTLIBOBJS@ +LT_SYS_LIBRARY_PATH = @LT_SYS_LIBRARY_PATH@ +MAINT = @MAINT@ +MAKEINFO = @MAKEINFO@ +MANIFEST_TOOL = @MANIFEST_TOOL@ +MKDIR_P = @MKDIR_P@ +NM = @NM@ +NMEDIT = @NMEDIT@ +OBJDUMP = @OBJDUMP@ +OBJEXT = @OBJEXT@ +OTOOL = @OTOOL@ +OTOOL64 = @OTOOL64@ +PACKAGE = @PACKAGE@ +PACKAGE_BUGREPORT = @PACKAGE_BUGREPORT@ +PACKAGE_NAME = @PACKAGE_NAME@ +PACKAGE_STRING = @PACKAGE_STRING@ +PACKAGE_TARNAME = @PACKAGE_TARNAME@ +PACKAGE_URL = @PACKAGE_URL@ +PACKAGE_VERSION = @PACKAGE_VERSION@ +PATH_SEPARATOR = @PATH_SEPARATOR@ +PNGLIB_MAJOR = @PNGLIB_MAJOR@ +PNGLIB_MINOR = @PNGLIB_MINOR@ +PNGLIB_RELEASE = @PNGLIB_RELEASE@ +PNGLIB_VERSION = @PNGLIB_VERSION@ + +# PNG_COPTS give extra options for the C compiler to be used on all compilation +# steps (unless targe_CFLAGS is specified; that will take precedence over +# AM_CFLAGS) +PNG_COPTS = @PNG_COPTS@ +PNG_PREFIX = @PNG_PREFIX@ +POW_LIB = @POW_LIB@ +RANLIB = @RANLIB@ +SED = @SED@ +SET_MAKE = @SET_MAKE@ +SHELL = @SHELL@ +STRIP = @STRIP@ +SYMBOL_PREFIX = @SYMBOL_PREFIX@ +VERSION = @VERSION@ +abs_builddir = @abs_builddir@ +abs_srcdir = @abs_srcdir@ +abs_top_builddir = @abs_top_builddir@ +abs_top_srcdir = @abs_top_srcdir@ +ac_ct_AR = @ac_ct_AR@ +ac_ct_CC = @ac_ct_CC@ +ac_ct_DUMPBIN = @ac_ct_DUMPBIN@ +am__include = @am__include@ +am__leading_dot = @am__leading_dot@ +am__quote = @am__quote@ +am__tar = @am__tar@ +am__untar = @am__untar@ + +# generate the -config scripts if required +binconfigs = libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@-config +bindir = @bindir@ +build = @build@ +build_alias = @build_alias@ +build_cpu = @build_cpu@ +build_os = @build_os@ +build_vendor = @build_vendor@ +builddir = @builddir@ +datadir = @datadir@ +datarootdir = @datarootdir@ +docdir = @docdir@ +dvidir = @dvidir@ +exec_prefix = @exec_prefix@ +host = @host@ +host_alias = @host_alias@ +host_cpu = @host_cpu@ +host_os = @host_os@ +host_vendor = @host_vendor@ +htmldir = @htmldir@ +includedir = @includedir@ +infodir = @infodir@ +install_sh = @install_sh@ +libdir = @libdir@ +libexecdir = @libexecdir@ +localedir = @localedir@ +localstatedir = @localstatedir@ +mandir = @mandir@ +mkdir_p = @mkdir_p@ +oldincludedir = @oldincludedir@ +pdfdir = @pdfdir@ + +# pkg-config stuff, note that libpng.pc is always required in order +# to get the correct library +pkgconfigdir = @pkgconfigdir@ +prefix = @prefix@ +program_transform_name = @program_transform_name@ +psdir = @psdir@ +sbindir = @sbindir@ +sharedstatedir = @sharedstatedir@ +srcdir = @srcdir@ +sysconfdir = @sysconfdir@ +target_alias = @target_alias@ +top_build_prefix = @top_build_prefix@ +top_builddir = @top_builddir@ +top_srcdir = @top_srcdir@ +PNGLIB_BASENAME = libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@ +ACLOCAL_AMFLAGS = -I scripts + +# This ensures that pnglibconf.h gets built at the start of 'make all' or +# 'make check', but it does not add dependencies to the individual programs, +# this is done below. +# +# IMPORTANT: always add the object modules of new programs to the list below +# because otherwise the sequence 'configure; make new-program' will *sometimes* +# result in the installed (system) pnglibconf.h being used and the result is +# always wrong and always very confusing. +BUILT_SOURCES = pnglibconf.h +pngtest_SOURCES = pngtest.c +pngtest_LDADD = libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.la +pngvalid_SOURCES = contrib/libtests/pngvalid.c +pngvalid_LDADD = libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.la +pngstest_SOURCES = contrib/libtests/pngstest.c +pngstest_LDADD = libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.la +pngunknown_SOURCES = contrib/libtests/pngunknown.c +pngunknown_LDADD = libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.la +pngimage_SOURCES = contrib/libtests/pngimage.c +pngimage_LDADD = libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.la +timepng_SOURCES = contrib/libtests/timepng.c +timepng_LDADD = libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.la +pngfix_SOURCES = contrib/tools/pngfix.c +pngfix_LDADD = libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.la +png_fix_itxt_SOURCES = contrib/tools/png-fix-itxt.c +pngcp_SOURCES = contrib/tools/pngcp.c +pngcp_LDADD = libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.la + +# Generally these are single line shell scripts to run a test with a particular +# set of parameters: +TESTS = \ + tests/pngtest\ + tests/pngtest-badpngs\ + tests/pngvalid-gamma-16-to-8 tests/pngvalid-gamma-alpha-mode\ + tests/pngvalid-gamma-background tests/pngvalid-gamma-expand16-alpha-mode\ + tests/pngvalid-gamma-expand16-background\ + tests/pngvalid-gamma-expand16-transform tests/pngvalid-gamma-sbit\ + tests/pngvalid-gamma-threshold tests/pngvalid-gamma-transform\ + tests/pngvalid-progressive-size\ + tests/pngvalid-progressive-interlace-standard\ + tests/pngvalid-transform\ + tests/pngvalid-progressive-standard tests/pngvalid-standard\ + tests/pngstest-1.8 tests/pngstest-1.8-alpha tests/pngstest-linear\ + tests/pngstest-linear-alpha tests/pngstest-none tests/pngstest-none-alpha\ + tests/pngstest-sRGB tests/pngstest-sRGB-alpha tests/pngunknown-IDAT\ + tests/pngunknown-discard tests/pngunknown-if-safe tests/pngunknown-sAPI\ + tests/pngunknown-sTER tests/pngunknown-save tests/pngunknown-vpAg\ + tests/pngimage-quick tests/pngimage-full + + +# man pages +dist_man_MANS = libpng.3 libpngpf.3 png.5 +EXTRA_SCRIPTS = libpng-config libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@-config +bin_SCRIPTS = @binconfigs@ + +# rules to build libpng, only build the old library on request +lib_LTLIBRARIES = libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.la +# EXTRA_LTLIBRARIES= libpng.la +libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_SOURCES = png.c pngerror.c \ + pngget.c pngmem.c pngpread.c pngread.c pngrio.c pngrtran.c \ + pngrutil.c pngset.c pngtrans.c pngwio.c pngwrite.c pngwtran.c \ + pngwutil.c png.h pngconf.h pngdebug.h pnginfo.h pngpriv.h \ + pngstruct.h pngusr.dfa $(am__append_2) $(am__append_3) \ + $(am__append_4) $(am__append_5) +nodist_libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_SOURCES = pnglibconf.h +libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_LDFLAGS = -no-undefined \ + -export-dynamic -version-number \ + @PNGLIB_MAJOR@@PNGLIB_MINOR@:@PNGLIB_RELEASE@:0 \ + $(am__append_6) $(am__append_7) $(am__append_8) +@HAVE_LD_VERSION_SCRIPT_FALSE@libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_DEPENDENCIES = libpng.sym +@HAVE_LD_VERSION_SCRIPT_TRUE@libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_DEPENDENCIES = libpng.vers +pkginclude_HEADERS = png.h pngconf.h +nodist_pkginclude_HEADERS = pnglibconf.h +pkgconfig_DATA = libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.pc + +# Extra source distribution files, '${srcdir}' is used below to stop build files +# from those directories being included. This only works if the configure is +# not done in the source directory! +EXTRA_DIST = \ + ANNOUNCE AUTHORS CHANGES INSTALL LICENSE README TODO TRADEMARK \ + pngtest.png pngbar.png pngnow.png pngbar.jpg autogen.sh \ + ${srcdir}/contrib ${srcdir}/projects ${srcdir}/scripts \ + $(TESTS) $(XFAIL_TESTS) tests/pngstest \ + CMakeLists.txt example.c libpng-manual.txt + +SCRIPT_CLEANFILES = scripts/*.out scripts/*.chk +CLEANFILES = *.tf? pngout.png libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.pc \ + libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@-config libpng.vers libpng.sym \ + check.new pnglibconf.h pngprefix.h symbols.new pngtest-log.txt \ + pnglibconf.out pnglibconf.c pnglibconf.pre pnglibconf.dfn \ + $(SCRIPT_CLEANFILES) + +MAINTAINERCLEANFILES = Makefile.in aclocal.m4 config.guess config.h.in \ +config.sub configure depcomp install-sh ltmain.sh missing + +AM_CFLAGS = ${PNG_COPTS} +SUFFIXES = .chk .out + +# We must use -DPNG_NO_USE_READ_MACROS here even when the library may actually +# be built with PNG_USE_READ_MACROS; this prevents the read macros from +# interfering with the symbol file format. +SYMBOL_CFLAGS = -DPNGLIB_LIBNAME='PNG@PNGLIB_MAJOR@@PNGLIB_MINOR@_0' \ + -DPNGLIB_VERSION='@PNGLIB_VERSION@' \ + -DSYMBOL_PREFIX='$(SYMBOL_PREFIX)' -DPNG_NO_USE_READ_MACROS \ + -DPNG_BUILDING_SYMBOL_TABLE $(am__append_9) + +# EXT_LIST is a list of the possibly library directory extensions, this exists +# because we can't find a good way of discovering the file extensions that are +# actually installed on a given system, so instead we check for every extension +# we have seen. +EXT_LIST = a dll.a so so.@PNGLIB_MAJOR@@PNGLIB_MINOR@.@PNGLIB_RELEASE@ la sl dylib +all: $(BUILT_SOURCES) config.h + $(MAKE) $(AM_MAKEFLAGS) all-am + +.SUFFIXES: +.SUFFIXES: .chk .out .S .c .lo .log .o .obj .test .test$(EXEEXT) .trs +am--refresh: Makefile + @: +$(srcdir)/Makefile.in: @MAINTAINER_MODE_TRUE@ $(srcdir)/Makefile.am $(am__configure_deps) + @for dep in $?; do \ + case '$(am__configure_deps)' in \ + 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s=0 pnglibconf.out s=1 scripts/prefix.out\ +@DO_PNG_PREFIX_TRUE@ s=2 ${srcdir}/scripts/macro.lst >pnglibconf.tf8 +@DO_PNG_PREFIX_TRUE@ mv pnglibconf.tf8 $@ + +@DO_PNG_PREFIX_TRUE@pngprefix.h: scripts/intprefix.out +@DO_PNG_PREFIX_TRUE@ rm -f pngprefix.tf1 +@DO_PNG_PREFIX_TRUE@ $(AWK) '{print "#define", $$1, "@PNG_PREFIX@" $$1}' $? >pngprefix.tf1 +@DO_PNG_PREFIX_TRUE@ mv pngprefix.tf1 $@ +@DO_PNG_PREFIX_FALSE@pnglibconf.h: pnglibconf.out +@DO_PNG_PREFIX_FALSE@ rm -f $@ +@DO_PNG_PREFIX_FALSE@ cp $? $@ + +@DO_PNG_PREFIX_FALSE@pngprefix.h: # is empty +@DO_PNG_PREFIX_FALSE@ :>$@ + +$(srcdir)/scripts/pnglibconf.h.prebuilt: + @echo "Attempting to build $@" >&2 + @echo "This is a machine generated file, but if you want to make" >&2 + @echo "a new one simply make 'scripts/pnglibconf.out', copy that" >&2 + @echo "AND set PNG_ZLIB_VERNUM to 0 (you MUST do this)" >&2 + @exit 1 + +# The following is necessary to ensure that the local pnglibconf.h is used, not +# an installed one (this can happen immediately after on a clean system if +# 'make test' is the first thing the user does.) Only files which include +# one of the png source files (typically png.h or pngpriv.h) need to be listed +# here: +pngtest.o: pnglibconf.h + +contrib/libtests/makepng.o: pnglibconf.h +contrib/libtests/pngstest.o: pnglibconf.h +contrib/libtests/pngunknown.o: pnglibconf.h +contrib/libtests/pngimage.o: pnglibconf.h +contrib/libtests/pngvalid.o: pnglibconf.h +contrib/libtests/readpng.o: pnglibconf.h +contrib/libtests/tarith.o: pnglibconf.h +contrib/libtests/timepng.o: pnglibconf.h + +contrib/tools/makesRGB.o: pnglibconf.h +contrib/tools/pngfix.o: pnglibconf.h +contrib/tools/pngcp.o: pnglibconf.h + +.c.out: + rm -f $@ $*.tf[12] + test -d scripts || mkdir scripts || test -d scripts + $(DFNCPP) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES)\ + $(CPPFLAGS) $(SYMBOL_CFLAGS) $< > $*.tf1 + $(AWK) -f "${srcdir}/scripts/dfn.awk" out="$*.tf2" $*.tf1 1>&2 + rm -f $*.tf1 + mv $*.tf2 $@ + +# The .c file for pnglibconf.h is machine generated +pnglibconf.c: scripts/pnglibconf.dfa scripts/options.awk pngconf.h pngusr.dfa $(DFA_XTRA) + rm -f $@ $*.tf[45] + $(AWK) -f ${srcdir}/scripts/options.awk out=$*.tf4 version=search\ + ${srcdir}/pngconf.h ${srcdir}/scripts/pnglibconf.dfa\ + ${srcdir}/pngusr.dfa $(DFA_XTRA) 1>&2 + $(AWK) -f ${srcdir}/scripts/options.awk out=$*.tf5 $*.tf4 1>&2 + rm $*.tf4 + mv $*.tf5 $@ + +# Symbol checks (.def and .out files should match) +scripts/symbols.chk: scripts/checksym.awk scripts/symbols.def scripts/symbols.out + +.out.chk: + rm -f $@ $*.new + $(AWK) -f ${srcdir}/scripts/checksym.awk ${srcdir}/scripts/${*F}.def\ + of="$*.new" $< >&2 + mv $*.new $@ + +# used on demand to regenerate the standard header, CPPFLAGS should +# be empty - no non-standard defines +scripts/pnglibconf.c: scripts/pnglibconf.dfa scripts/options.awk pngconf.h + rm -f $@ pnglibconf.tf[67] + test -z "$(CPPFLAGS)" + echo "com @PNGLIB_VERSION@ STANDARD API DEFINITION" |\ + $(AWK) -f ${srcdir}/scripts/options.awk out=pnglibconf.tf6\ + logunsupported=1 version=search ${srcdir}/pngconf.h -\ + ${srcdir}/scripts/pnglibconf.dfa 1>&2 + $(AWK) -f ${srcdir}/scripts/options.awk out=pnglibconf.tf7\ + pnglibconf.tf6 1>&2 + rm pnglibconf.tf6 + mv pnglibconf.tf7 $@ + +$(libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_OBJECTS): png.h pngconf.h \ + pnglibconf.h pngpriv.h pngdebug.h pnginfo.h pngstruct.h pngprefix.h + +test: check-am + +# Extra checks +check: scripts/symbols.chk + +# Don't distribute the generated script files +dist-hook: + cd '$(top_distdir)'; rm -f $(SCRIPT_CLEANFILES) + +# Make links between installed files with release-specific names and the generic +# file names. If this install rule is run the generic names will be deleted and +# recreated - this has obvious issues for systems with multiple installations. + +install-header-links: + @set -ex; cd '$(DESTDIR)$(includedir)'; for f in $(HEADERS); do \ + rm -f "$$f"; $(LN_S) "$(PNGLIB_BASENAME)/$$f" "$$f"; done + +uninstall-header-links: + cd '$(DESTDIR)$(includedir)'; rm -f $(HEADERS) + +install-libpng-pc: + @set -ex; cd '$(DESTDIR)$(pkgconfigdir)'; rm -f libpng.pc; \ + $(LN_S) '$(PNGLIB_BASENAME).pc' libpng.pc + +uninstall-libpng-pc: + rm -f '$(DESTDIR)$(pkgconfigdir)/libpng.pc' + +install-library-links: + @set -x; cd '$(DESTDIR)$(libdir)';\ + for ext in $(EXT_LIST); do\ + rm -f "libpng.$$ext";\ + if test -f "$(PNGLIB_BASENAME).$$ext"; then\ + $(LN_S) "$(PNGLIB_BASENAME).$$ext" "libpng.$$ext" || exit 1;\ + fi;\ + done + +uninstall-library-links: + @set -x; cd '$(DESTDIR)$(libdir)'; for ext in $(EXT_LIST); do\ + rm -f "libpng.$$ext"; done + +install-libpng-config: + @set -ex; cd '$(DESTDIR)$(bindir)'; rm -f libpng-config; \ + $(LN_S) '$(PNGLIB_BASENAME)-config' libpng-config + +uninstall-libpng-config: + rm -f '$(DESTDIR)$(bindir)/libpng-config' + +# If --enable-unversioned-links is specified the header and lib file links +# will be automatically made on a 'make install': + +@DO_INSTALL_LINKS_TRUE@install-data-hook: install-header-links +@DO_INSTALL_LINKS_TRUE@uninstall-hook: uninstall-header-links +@DO_INSTALL_LINKS_TRUE@install-exec-hook: install-library-links +@DO_INSTALL_LINKS_TRUE@uninstall-hook: uninstall-library-links + +# Likewise, --install-pc causes libpng.pc to be constructed: + +@DO_INSTALL_LIBPNG_PC_TRUE@install-data-hook: install-libpng-pc +@DO_INSTALL_LIBPNG_PC_TRUE@uninstall-hook: uninstall-libpng-pc + +# And --install-config: + +@DO_INSTALL_LIBPNG_CONFIG_TRUE@install-exec-hook: install-libpng-config +@DO_INSTALL_LIBPNG_CONFIG_TRUE@uninstall-hook: uninstall-libpng-config + +# The following addition ensures that 'make all' always builds the test programs +# too. It used to, but some change either in libpng or configure stopped this +# working. +all-am: $(check_PROGRAMS) + +# Tell versions [3.59,3.63) of GNU make to not export all variables. +# Otherwise a system limit (for SysV at least) may be exceeded. +.NOEXPORT: diff --git a/extern/libpng/include/README b/extern/libpng/README similarity index 55% rename from extern/libpng/include/README rename to extern/libpng/README index e821ee4c87..cfc1f0e3dc 100644 --- a/extern/libpng/include/README +++ b/extern/libpng/README @@ -1,15 +1,16 @@ -README for libpng version 1.5.10 - March 29, 2012 (shared library 15.0) -See the note about version numbers near the top of png.h +README for libpng version 1.6.37 - April 14, 2019 +================================================= +See the note about version numbers near the top of png.h. See INSTALL for instructions on how to install libpng. -Libpng comes in several distribution formats. Get libpng-*.tar.gz, -libpng-*.tar.xz or libpng-*.tar.bz2 if you want UNIX-style line endings -in the text files, or lpng*.zip if you want DOS-style line endings. +Libpng comes in several distribution formats. Get libpng-*.tar.gz or +libpng-*.tar.xz or if you want UNIX-style line endings in the text +files, or lpng*.7z or lpng*.zip if you want DOS-style line endings. Version 0.89 was the first official release of libpng. Don't let the -fact that it's the first release fool you. The libpng library has been in -extensive use and testing since mid-1995. By late 1997 it had +fact that it's the first release fool you. The libpng library has been +in extensive use and testing since mid-1995. By late 1997 it had finally gotten to the stage where there hadn't been significant changes to the API in some time, and people have a bad feeling about libraries with versions < 1.0. Version 1.0.0 was released in @@ -23,18 +24,25 @@ earlier versions if you are using a shared library. The type of the png_uint_32, which will affect shared-library applications that use this function. -To avoid problems with changes to the internals of png_info_struct, +To avoid problems with changes to the internals of the png info_struct, new APIs have been made available in 0.95 to avoid direct application access to info_ptr. These functions are the png_set_ and png_get_ functions. These functions should be used when accessing/storing the info_struct data, rather than manipulating it directly, to avoid such problems in the future. -It is important to note that the APIs do not make current programs +It is important to note that the APIs did not make current programs that access the info struct directly incompatible with the new -library. However, it is strongly suggested that new programs use -the new APIs (as shown in example.c and pngtest.c), and older programs -be converted to the new format, to facilitate upgrades in the future. +library, through libpng-1.2.x. In libpng-1.4.x, which was meant to +be a transitional release, members of the png_struct and the +info_struct can still be accessed, but the compiler will issue a +warning about deprecated usage. Since libpng-1.5.0, direct access +to these structs is not allowed, and the definitions of the structs +reside in private pngstruct.h and pnginfo.h header files that are not +accessible to applications. It is strongly suggested that new +programs use the new APIs (as shown in example.c and pngtest.c), and +older programs be converted to the new format, to facilitate upgrades +in the future. **** Additions since 0.90 include the ability to compile libpng as a @@ -53,90 +61,59 @@ the library action on the detection of chunk CRC errors. It is possible to set different actions based on whether the CRC error occurred in a critical or an ancillary chunk. -The changes made to the library, and bugs fixed are based on discussions -on the PNG-implement mailing list and not on material submitted -privately to Guy, Andreas, or Glenn. They will forward any good -suggestions to the list. - -For a detailed description on using libpng, read libpng-manual.txt. For -examples of libpng in a program, see example.c and pngtest.c. For usage -information and restrictions (what little they are) on libpng, see -png.h. For a description on using zlib (the compression library used by -libpng) and zlib's restrictions, see zlib.h +For a detailed description on using libpng, read libpng-manual.txt. +For examples of libpng in a program, see example.c and pngtest.c. For +usage information and restrictions (what little they are) on libpng, +see png.h. For a description on using zlib (the compression library +used by libpng) and zlib's restrictions, see zlib.h I have included a general makefile, as well as several machine and -compiler specific ones, but you may have to modify one for your own needs. +compiler specific ones, but you may have to modify one for your own +needs. You should use zlib 1.0.4 or later to run this, but it MAY work with versions as old as zlib 0.95. Even so, there are bugs in older zlib versions which can cause the output of invalid compression streams for -some images. You will definitely need zlib 1.0.4 or later if you are -taking advantage of the MS-DOS "far" structure allocation for the small -and medium memory models. You should also note that zlib is a -compression library that is useful for more things than just PNG files. -You can use zlib as a drop-in replacement for fread() and fwrite() if -you are so inclined. +some images. -zlib should be available at the same place that libpng is, or at. -ftp://ftp.info-zip.org/pub/infozip/zlib +You should also note that zlib is a compression library that is useful +for more things than just PNG files. You can use zlib as a drop-in +replacement for fread() and fwrite(), if you are so inclined. + +zlib should be available at the same place that libpng is, or at +https://zlib.net. You may also want a copy of the PNG specification. It is available as an RFC, a W3C Recommendation, and an ISO/IEC Standard. You can find -these at http://www.libpng.org/pub/png/documents/ +these at http://www.libpng.org/pub/png/pngdocs.html . -This code is currently being archived at libpng.sf.net in the -[DOWNLOAD] area, and on CompuServe, Lib 20 (PNG SUPPORT) -at GO GRAPHSUP. If you can't find it in any of those places, -e-mail me, and I'll help you find it. +This code is currently being archived at libpng.sourceforge.io in the +[DOWNLOAD] area, and at http://libpng.download/src . -If you have any code changes, requests, problems, etc., please e-mail -them to me. Also, I'd appreciate any make files or project files, -and any modifications you needed to make to get libpng to compile, -along with a #define variable to tell what compiler/system you are on. -If you needed to add transformations to libpng, or wish libpng would -provide the image in a different way, drop me a note (and code, if -possible), so I can consider supporting the transformation. -Finally, if you get any warning messages when compiling libpng -(note: not zlib), and they are easy to fix, I'd appreciate the -fix. Please mention "libpng" somewhere in the subject line. Thanks. - -This release was created and will be supported by myself (of course -based in a large way on Guy's and Andreas' earlier work), and the PNG +This release, based in a large way on Glenn's, Guy's and Andreas' +earlier work, was created and will be supported by myself and the PNG development group. Send comments/corrections/commendations to png-mng-implement at -lists.sourceforge.net (subscription required; visit +lists.sourceforge.net (subscription required; visit https://lists.sourceforge.net/lists/listinfo/png-mng-implement -to subscribe) or to glennrp at users.sourceforge.net +to subscribe). -You can't reach Guy, the original libpng author, at the addresses -given in previous versions of this document. He and Andreas will -read mail addressed to the png-implement list, however. - -Please do not send general questions about PNG. Send them to -png-mng-misc at lists.sf.net (subscription required; visit +Send general questions about the PNG specification to png-mng-misc +at lists.sourceforge.net (subscription required; visit https://lists.sourceforge.net/lists/listinfo/png-mng-misc to -subscribe). If you have a question about something -in the PNG specification that is related to using libpng, send it -to me. Send me any questions that start with "I was using libpng, -and ...". If in doubt, send questions to me. I'll bounce them -to others, if necessary. - -Please do not send suggestions on how to change PNG. We have -been discussing PNG for sixteen years now, and it is official and -finished. If you have suggestions for libpng, however, I'll -gladly listen. Even if your suggestion is not used immediately, -it may be used later. +subscribe). Files in this distribution: ANNOUNCE => Announcement of this version, with recent changes + AUTHORS => List of contributing authors CHANGES => Description of changes between libpng versions KNOWNBUG => List of known bugs and deficiencies LICENSE => License to use and redistribute libpng README => This file TODO => Things not implemented in the current library - Y2KINFO => Statement of Y2K compliance + TRADEMARK => Trademark information example.c => Example code for using libpng functions libpng.3 => manual page for libpng (includes libpng-manual.txt) libpng-manual.txt => Description of libpng and its functions @@ -167,36 +144,40 @@ Files in this distribution: pngwrite.c => High-level write functions pngwtran.c => Write data transformations pngwutil.c => Write utility functions + arm => Contains optimized code for the ARM platform + powerpc => Contains optimized code for the PowerPC platform contrib => Contributions + arm-neon => Optimized code for ARM-NEON platform + powerpc-vsx => Optimized code for POWERPC-VSX platform + examples => Example programs gregbook => source code for PNG reading and writing, from Greg Roelofs' "PNG: The Definitive Guide", O'Reilly, 1999 - msvctest => Builds and runs pngtest using a MSVC workspace - pngminus => Simple pnm2png and png2pnm programs - pngsuite => Test images - visupng => Contains a MSVC workspace for VisualPng + libtests => Test programs + mips-msa => Optimized code for MIPS-MSA platform + pngminim => Minimal decoder, encoder, and progressive decoder + programs demonstrating use of pngusr.dfa + pngminus => Simple pnm2png and png2pnm programs + pngsuite => Test images + testpngs + tools => Various tools + visupng => Contains a MSVC workspace for VisualPng + intel => Optimized code for INTEL-SSE2 platform + mips => Optimized code for MIPS platform projects => Contains project files and workspaces for building a DLL - cbuilder5 => Contains a Borland workspace for building - libpng and zlib - visualc6 => Contains a Microsoft Visual C++ (MSVC) - workspace for building libpng and zlib + owatcom => Contains a WATCOM project for building libpng visualc71 => Contains a Microsoft Visual C++ (MSVC) workspace for building libpng and zlib - xcode => Contains an Apple xcode + vstudio => Contains a Microsoft Visual C++ (MSVC) workspace for building libpng and zlib scripts => Directory containing scripts for building libpng: (see scripts/README.txt for the list of scripts) -Good luck, and happy coding. +Good luck, and happy coding! --Glenn Randers-Pehrson (current maintainer, since 1998) - Internet: glennrp at users.sourceforge.net - --Andreas Eric Dilger (former maintainer, 1996-1997) - Internet: adilger at enel.ucalgary.ca - Web: http://www-mddsp.enel.ucalgary.ca/People/adilger/ - --Guy Eric Schalnat (original author and former maintainer, 1995-1996) - (formerly of Group 42, Inc) - Internet: gschal at infinet.com + * Cosmin Truta (current maintainer, since 2018) + * Glenn Randers-Pehrson (former maintainer, 1998-2018) + * Andreas Eric Dilger (former maintainer, 1996-1997) + * Guy Eric Schalnat (original author and former maintainer, 1995-1996) + (formerly of Group 42, Inc.) diff --git a/extern/libpng/TODO b/extern/libpng/TODO new file mode 100644 index 0000000000..562dab0696 --- /dev/null +++ b/extern/libpng/TODO @@ -0,0 +1,23 @@ +TODO - list of things to do for libpng: + +* Fix all defects (duh!) +* Better C++ wrapper / full C++ implementation (?) +* Fix the problems with C++ and 'extern "C"'. +* cHRM transformation. +* Palette creation. +* "grayscale->palette" transformation and "palette->grayscale" detection. +* Improved dithering. +* Multi-lingual error and warning message support. +* Complete sRGB transformation. (Currently it simply uses gamma=0.45455.) +* Man pages for function calls. +* Better documentation. +* Better filter selection + (e.g., counting huffman bits/precompression; filter inertia; filter costs). +* Histogram creation. +* Text conversion between different code pages (e.g., Latin-1 -> Mac). +* Avoid building gamma tables whenever possible. +* Greater precision in changing to linear gamma for compositing against + background, and in doing rgb-to-gray transformations. +* Investigate pre-incremented loop counters and other loop constructions. +* Interpolated method of handling interlacing. +* More validations for libpng transformations. diff --git a/extern/libpng/TRADEMARK b/extern/libpng/TRADEMARK new file mode 100644 index 0000000000..ac667187d6 --- /dev/null +++ b/extern/libpng/TRADEMARK @@ -0,0 +1,8 @@ +TRADEMARK +========= + +The name "libpng" has not been registered by the Copyright owners +as a trademark in any jurisdiction. 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In the case of the ARM + * NEON instructions there is no processor-specific way of detecting the + * presence of the required support, therefore run-time detection is extremely + * OS specific. + * + * You may set the macro PNG_ARM_NEON_FILE to the file name of file containing + * a fragment of C source code which defines the png_have_neon function. There + * are a number of implementations in contrib/arm-neon, but the only one that + * has partial support is contrib/arm-neon/linux.c - a generic Linux + * implementation which reads /proc/cpufino. + */ +#ifndef PNG_ARM_NEON_FILE +# ifdef __linux__ +# define PNG_ARM_NEON_FILE "contrib/arm-neon/linux.c" +# endif +#endif + +#ifdef PNG_ARM_NEON_FILE + +#include /* for sig_atomic_t */ +static int png_have_neon(png_structp png_ptr); +#include PNG_ARM_NEON_FILE + +#else /* PNG_ARM_NEON_FILE */ +# error "PNG_ARM_NEON_FILE undefined: no support for run-time ARM NEON checks" +#endif /* PNG_ARM_NEON_FILE */ +#endif /* PNG_ARM_NEON_CHECK_SUPPORTED */ + +#ifndef PNG_ALIGNED_MEMORY_SUPPORTED +# error "ALIGNED_MEMORY is required; set: -DPNG_ALIGNED_MEMORY_SUPPORTED" +#endif + +void +png_init_filter_functions_neon(png_structp pp, unsigned int bpp) +{ + /* The switch statement is compiled in for ARM_NEON_API, the call to + * png_have_neon is compiled in for ARM_NEON_CHECK. If both are defined + * the check is only performed if the API has not set the NEON option on + * or off explicitly. In this case the check controls what happens. + * + * If the CHECK is not compiled in and the option is UNSET the behavior prior + * to 1.6.7 was to use the NEON code - this was a bug caused by having the + * wrong order of the 'ON' and 'default' cases. UNSET now defaults to OFF, + * as documented in png.h + */ + png_debug(1, "in png_init_filter_functions_neon"); +#ifdef PNG_ARM_NEON_API_SUPPORTED + switch ((pp->options >> PNG_ARM_NEON) & 3) + { + case PNG_OPTION_UNSET: + /* Allow the run-time check to execute if it has been enabled - + * thus both API and CHECK can be turned on. If it isn't supported + * this case will fall through to the 'default' below, which just + * returns. + */ +#endif /* PNG_ARM_NEON_API_SUPPORTED */ +#ifdef PNG_ARM_NEON_CHECK_SUPPORTED + { + static volatile sig_atomic_t no_neon = -1; /* not checked */ + + if (no_neon < 0) + no_neon = !png_have_neon(pp); + + if (no_neon) + return; + } +#ifdef PNG_ARM_NEON_API_SUPPORTED + break; +#endif +#endif /* PNG_ARM_NEON_CHECK_SUPPORTED */ + +#ifdef PNG_ARM_NEON_API_SUPPORTED + default: /* OFF or INVALID */ + return; + + case PNG_OPTION_ON: + /* Option turned on */ + break; + } +#endif + + /* IMPORTANT: any new external functions used here must be declared using + * PNG_INTERNAL_FUNCTION in ../pngpriv.h. This is required so that the + * 'prefix' option to configure works: + * + * ./configure --with-libpng-prefix=foobar_ + * + * Verify you have got this right by running the above command, doing a build + * and examining pngprefix.h; it must contain a #define for every external + * function you add. (Notice that this happens automatically for the + * initialization function.) + */ + pp->read_filter[PNG_FILTER_VALUE_UP-1] = png_read_filter_row_up_neon; + + if (bpp == 3) + { + pp->read_filter[PNG_FILTER_VALUE_SUB-1] = png_read_filter_row_sub3_neon; + pp->read_filter[PNG_FILTER_VALUE_AVG-1] = png_read_filter_row_avg3_neon; + pp->read_filter[PNG_FILTER_VALUE_PAETH-1] = + png_read_filter_row_paeth3_neon; + } + + else if (bpp == 4) + { + pp->read_filter[PNG_FILTER_VALUE_SUB-1] = png_read_filter_row_sub4_neon; + pp->read_filter[PNG_FILTER_VALUE_AVG-1] = png_read_filter_row_avg4_neon; + pp->read_filter[PNG_FILTER_VALUE_PAETH-1] = + png_read_filter_row_paeth4_neon; + } +} +#endif /* PNG_ARM_NEON_OPT > 0 */ +#endif /* READ */ diff --git a/extern/libpng/arm/filter_neon.S b/extern/libpng/arm/filter_neon.S new file mode 100644 index 0000000000..2308aad13e --- /dev/null +++ b/extern/libpng/arm/filter_neon.S @@ -0,0 +1,253 @@ + +/* filter_neon.S - NEON optimised filter functions + * + * Copyright (c) 2018 Cosmin Truta + * Copyright (c) 2014,2017 Glenn Randers-Pehrson + * Written by Mans Rullgard, 2011. + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + */ + +/* This is required to get the symbol renames, which are #defines, and the + * definitions (or not) of PNG_ARM_NEON_OPT and PNG_ARM_NEON_IMPLEMENTATION. + */ +#define PNG_VERSION_INFO_ONLY +#include "../pngpriv.h" + +#if (defined(__linux__) || defined(__FreeBSD__)) && defined(__ELF__) +.section .note.GNU-stack,"",%progbits /* mark stack as non-executable */ +#endif + +#ifdef PNG_READ_SUPPORTED + +/* Assembler NEON support - only works for 32-bit ARM (i.e. it does not work for + * ARM64). The code in arm/filter_neon_intrinsics.c supports ARM64, however it + * only works if -mfpu=neon is specified on the GCC command line. See pngpriv.h + * for the logic which sets PNG_USE_ARM_NEON_ASM: + */ +#if PNG_ARM_NEON_IMPLEMENTATION == 2 /* hand-coded assembler */ + +#if PNG_ARM_NEON_OPT > 0 + +#ifdef __ELF__ +# define ELF +#else +# define ELF @ +#endif + + .arch armv7-a + .fpu neon + +.macro func name, export=0 + .macro endfunc +ELF .size \name, . - \name + .endfunc + .purgem endfunc + .endm + .text + + /* Explicitly specifying alignment here because some versions of + * GAS don't align code correctly. This is harmless in correctly + * written versions of GAS. + */ + .align 2 + + .if \export + .global \name + .endif +ELF .type \name, STT_FUNC + .func \name +\name: +.endm + +func png_read_filter_row_sub4_neon, export=1 + ldr r3, [r0, #4] @ rowbytes + vmov.i8 d3, #0 +1: + vld4.32 {d4[],d5[],d6[],d7[]}, [r1,:128] + vadd.u8 d0, d3, d4 + vadd.u8 d1, d0, d5 + vadd.u8 d2, d1, d6 + vadd.u8 d3, d2, d7 + vst4.32 {d0[0],d1[0],d2[0],d3[0]},[r1,:128]! + subs r3, r3, #16 + bgt 1b + + bx lr +endfunc + +func png_read_filter_row_sub3_neon, export=1 + ldr r3, [r0, #4] @ rowbytes + vmov.i8 d3, #0 + mov r0, r1 + mov r2, #3 + mov r12, #12 + vld1.8 {q11}, [r0], r12 +1: + vext.8 d5, d22, d23, #3 + vadd.u8 d0, d3, d22 + vext.8 d6, d22, d23, #6 + vadd.u8 d1, d0, d5 + vext.8 d7, d23, d23, #1 + vld1.8 {q11}, [r0], r12 + vst1.32 {d0[0]}, [r1,:32], r2 + vadd.u8 d2, d1, d6 + vst1.32 {d1[0]}, [r1], r2 + vadd.u8 d3, d2, d7 + vst1.32 {d2[0]}, [r1], r2 + vst1.32 {d3[0]}, [r1], r2 + subs r3, r3, #12 + bgt 1b + + bx lr +endfunc + +func png_read_filter_row_up_neon, export=1 + ldr r3, [r0, #4] @ rowbytes +1: + vld1.8 {q0}, [r1,:128] + vld1.8 {q1}, [r2,:128]! + vadd.u8 q0, q0, q1 + vst1.8 {q0}, [r1,:128]! + subs r3, r3, #16 + bgt 1b + + bx lr +endfunc + +func png_read_filter_row_avg4_neon, export=1 + ldr r12, [r0, #4] @ rowbytes + vmov.i8 d3, #0 +1: + vld4.32 {d4[],d5[],d6[],d7[]}, [r1,:128] + vld4.32 {d16[],d17[],d18[],d19[]},[r2,:128]! + vhadd.u8 d0, d3, d16 + vadd.u8 d0, d0, d4 + vhadd.u8 d1, d0, d17 + vadd.u8 d1, d1, d5 + vhadd.u8 d2, d1, d18 + vadd.u8 d2, d2, d6 + vhadd.u8 d3, d2, d19 + vadd.u8 d3, d3, d7 + vst4.32 {d0[0],d1[0],d2[0],d3[0]},[r1,:128]! + subs r12, r12, #16 + bgt 1b + + bx lr +endfunc + +func png_read_filter_row_avg3_neon, export=1 + push {r4,lr} + ldr r12, [r0, #4] @ rowbytes + vmov.i8 d3, #0 + mov r0, r1 + mov r4, #3 + mov lr, #12 + vld1.8 {q11}, [r0], lr +1: + vld1.8 {q10}, [r2], lr + vext.8 d5, d22, d23, #3 + vhadd.u8 d0, d3, d20 + vext.8 d17, d20, d21, #3 + vadd.u8 d0, d0, d22 + vext.8 d6, d22, d23, #6 + vhadd.u8 d1, d0, d17 + vext.8 d18, d20, d21, #6 + vadd.u8 d1, d1, d5 + vext.8 d7, d23, d23, #1 + vld1.8 {q11}, [r0], lr + vst1.32 {d0[0]}, [r1,:32], r4 + vhadd.u8 d2, d1, d18 + vst1.32 {d1[0]}, [r1], r4 + vext.8 d19, d21, d21, #1 + vadd.u8 d2, d2, d6 + vhadd.u8 d3, d2, d19 + vst1.32 {d2[0]}, [r1], r4 + vadd.u8 d3, d3, d7 + vst1.32 {d3[0]}, [r1], r4 + subs r12, r12, #12 + bgt 1b + + pop {r4,pc} +endfunc + +.macro paeth rx, ra, rb, rc + vaddl.u8 q12, \ra, \rb @ a + b + vaddl.u8 q15, \rc, \rc @ 2*c + vabdl.u8 q13, \rb, \rc @ pa + vabdl.u8 q14, \ra, \rc @ pb + vabd.u16 q15, q12, q15 @ pc + vcle.u16 q12, q13, q14 @ pa <= pb + vcle.u16 q13, q13, q15 @ pa <= pc + vcle.u16 q14, q14, q15 @ pb <= pc + vand q12, q12, q13 @ pa <= pb && pa <= pc + vmovn.u16 d28, q14 + vmovn.u16 \rx, q12 + vbsl d28, \rb, \rc + vbsl \rx, \ra, d28 +.endm + +func png_read_filter_row_paeth4_neon, export=1 + ldr r12, [r0, #4] @ rowbytes + vmov.i8 d3, #0 + vmov.i8 d20, #0 +1: + vld4.32 {d4[],d5[],d6[],d7[]}, [r1,:128] + vld4.32 {d16[],d17[],d18[],d19[]},[r2,:128]! + paeth d0, d3, d16, d20 + vadd.u8 d0, d0, d4 + paeth d1, d0, d17, d16 + vadd.u8 d1, d1, d5 + paeth d2, d1, d18, d17 + vadd.u8 d2, d2, d6 + paeth d3, d2, d19, d18 + vmov d20, d19 + vadd.u8 d3, d3, d7 + vst4.32 {d0[0],d1[0],d2[0],d3[0]},[r1,:128]! + subs r12, r12, #16 + bgt 1b + + bx lr +endfunc + +func png_read_filter_row_paeth3_neon, export=1 + push {r4,lr} + ldr r12, [r0, #4] @ rowbytes + vmov.i8 d3, #0 + vmov.i8 d4, #0 + mov r0, r1 + mov r4, #3 + mov lr, #12 + vld1.8 {q11}, [r0], lr +1: + vld1.8 {q10}, [r2], lr + paeth d0, d3, d20, d4 + vext.8 d5, d22, d23, #3 + vadd.u8 d0, d0, d22 + vext.8 d17, d20, d21, #3 + paeth d1, d0, d17, d20 + vst1.32 {d0[0]}, [r1,:32], r4 + vext.8 d6, d22, d23, #6 + vadd.u8 d1, d1, d5 + vext.8 d18, d20, d21, #6 + paeth d2, d1, d18, d17 + vext.8 d7, d23, d23, #1 + vld1.8 {q11}, [r0], lr + vst1.32 {d1[0]}, [r1], r4 + vadd.u8 d2, d2, d6 + vext.8 d19, d21, d21, #1 + paeth d3, d2, d19, d18 + vst1.32 {d2[0]}, [r1], r4 + vmov d4, d19 + vadd.u8 d3, d3, d7 + vst1.32 {d3[0]}, [r1], r4 + subs r12, r12, #12 + bgt 1b + + pop {r4,pc} +endfunc +#endif /* PNG_ARM_NEON_OPT > 0 */ +#endif /* PNG_ARM_NEON_IMPLEMENTATION == 2 (assembler) */ +#endif /* READ */ diff --git a/extern/libpng/arm/filter_neon_intrinsics.c b/extern/libpng/arm/filter_neon_intrinsics.c new file mode 100644 index 0000000000..553c0be21c --- /dev/null +++ b/extern/libpng/arm/filter_neon_intrinsics.c @@ -0,0 +1,402 @@ + +/* filter_neon_intrinsics.c - NEON optimised filter functions + * + * Copyright (c) 2018 Cosmin Truta + * Copyright (c) 2014,2016 Glenn Randers-Pehrson + * Written by James Yu , October 2013. + * Based on filter_neon.S, written by Mans Rullgard, 2011. + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + */ + +#include "../pngpriv.h" + +#ifdef PNG_READ_SUPPORTED + +/* This code requires -mfpu=neon on the command line: */ +#if PNG_ARM_NEON_IMPLEMENTATION == 1 /* intrinsics code from pngpriv.h */ + +#if defined(_MSC_VER) && defined(_M_ARM64) +# include +#else +# include +#endif + +/* libpng row pointers are not necessarily aligned to any particular boundary, + * however this code will only work with appropriate alignment. arm/arm_init.c + * checks for this (and will not compile unless it is done). This code uses + * variants of png_aligncast to avoid compiler warnings. + */ +#define png_ptr(type,pointer) png_aligncast(type *,pointer) +#define png_ptrc(type,pointer) png_aligncastconst(const type *,pointer) + +/* The following relies on a variable 'temp_pointer' being declared with type + * 'type'. This is written this way just to hide the GCC strict aliasing + * warning; note that the code is safe because there never is an alias between + * the input and output pointers. + * + * When compiling with MSVC ARM64, the png_ldr macro can't be passed directly + * to vst4_lane_u32, because of an internal compiler error inside MSVC. + * To avoid this compiler bug, we use a temporary variable (vdest_val) to store + * the result of png_ldr. + */ +#define png_ldr(type,pointer)\ + (temp_pointer = png_ptr(type,pointer), *temp_pointer) + +#if PNG_ARM_NEON_OPT > 0 + +void +png_read_filter_row_up_neon(png_row_infop row_info, png_bytep row, + png_const_bytep prev_row) +{ + png_bytep rp = row; + png_bytep rp_stop = row + row_info->rowbytes; + png_const_bytep pp = prev_row; + + png_debug(1, "in png_read_filter_row_up_neon"); + + for (; rp < rp_stop; rp += 16, pp += 16) + { + uint8x16_t qrp, qpp; + + qrp = vld1q_u8(rp); + qpp = vld1q_u8(pp); + qrp = vaddq_u8(qrp, qpp); + vst1q_u8(rp, qrp); + } +} + +void +png_read_filter_row_sub3_neon(png_row_infop row_info, png_bytep row, + png_const_bytep prev_row) +{ + png_bytep rp = row; + png_bytep rp_stop = row + row_info->rowbytes; + + uint8x16_t vtmp = vld1q_u8(rp); + uint8x8x2_t *vrpt = png_ptr(uint8x8x2_t, &vtmp); + uint8x8x2_t vrp = *vrpt; + + uint8x8x4_t vdest; + vdest.val[3] = vdup_n_u8(0); + + png_debug(1, "in png_read_filter_row_sub3_neon"); + + for (; rp < rp_stop;) + { + uint8x8_t vtmp1, vtmp2; + uint32x2_t *temp_pointer; + + vtmp1 = vext_u8(vrp.val[0], vrp.val[1], 3); + vdest.val[0] = vadd_u8(vdest.val[3], vrp.val[0]); + vtmp2 = vext_u8(vrp.val[0], vrp.val[1], 6); + vdest.val[1] = vadd_u8(vdest.val[0], vtmp1); + + vtmp1 = vext_u8(vrp.val[1], vrp.val[1], 1); + vdest.val[2] = vadd_u8(vdest.val[1], vtmp2); + vdest.val[3] = vadd_u8(vdest.val[2], vtmp1); + + vtmp = vld1q_u8(rp + 12); + vrpt = png_ptr(uint8x8x2_t, &vtmp); + vrp = *vrpt; + + vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[0]), 0); + rp += 3; + vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[1]), 0); + rp += 3; + vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[2]), 0); + rp += 3; + vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[3]), 0); + rp += 3; + } + + PNG_UNUSED(prev_row) +} + +void +png_read_filter_row_sub4_neon(png_row_infop row_info, png_bytep row, + png_const_bytep prev_row) +{ + png_bytep rp = row; + png_bytep rp_stop = row + row_info->rowbytes; + + uint8x8x4_t vdest; + vdest.val[3] = vdup_n_u8(0); + + png_debug(1, "in png_read_filter_row_sub4_neon"); + + for (; rp < rp_stop; rp += 16) + { + uint32x2x4_t vtmp = vld4_u32(png_ptr(uint32_t,rp)); + uint8x8x4_t *vrpt = png_ptr(uint8x8x4_t,&vtmp); + uint8x8x4_t vrp = *vrpt; + uint32x2x4_t *temp_pointer; + uint32x2x4_t vdest_val; + + vdest.val[0] = vadd_u8(vdest.val[3], vrp.val[0]); + vdest.val[1] = vadd_u8(vdest.val[0], vrp.val[1]); + vdest.val[2] = vadd_u8(vdest.val[1], vrp.val[2]); + vdest.val[3] = vadd_u8(vdest.val[2], vrp.val[3]); + + vdest_val = png_ldr(uint32x2x4_t, &vdest); + vst4_lane_u32(png_ptr(uint32_t,rp), vdest_val, 0); + } + + PNG_UNUSED(prev_row) +} + +void +png_read_filter_row_avg3_neon(png_row_infop row_info, png_bytep row, + png_const_bytep prev_row) +{ + png_bytep rp = row; + png_const_bytep pp = prev_row; + png_bytep rp_stop = row + row_info->rowbytes; + + uint8x16_t vtmp; + uint8x8x2_t *vrpt; + uint8x8x2_t vrp; + uint8x8x4_t vdest; + vdest.val[3] = vdup_n_u8(0); + + vtmp = vld1q_u8(rp); + vrpt = png_ptr(uint8x8x2_t,&vtmp); + vrp = *vrpt; + + png_debug(1, "in png_read_filter_row_avg3_neon"); + + for (; rp < rp_stop; pp += 12) + { + uint8x8_t vtmp1, vtmp2, vtmp3; + + uint8x8x2_t *vppt; + uint8x8x2_t vpp; + + uint32x2_t *temp_pointer; + + vtmp = vld1q_u8(pp); + vppt = png_ptr(uint8x8x2_t,&vtmp); + vpp = *vppt; + + vtmp1 = vext_u8(vrp.val[0], vrp.val[1], 3); + vdest.val[0] = vhadd_u8(vdest.val[3], vpp.val[0]); + vdest.val[0] = vadd_u8(vdest.val[0], vrp.val[0]); + + vtmp2 = vext_u8(vpp.val[0], vpp.val[1], 3); + vtmp3 = vext_u8(vrp.val[0], vrp.val[1], 6); + vdest.val[1] = vhadd_u8(vdest.val[0], vtmp2); + vdest.val[1] = vadd_u8(vdest.val[1], vtmp1); + + vtmp2 = vext_u8(vpp.val[0], vpp.val[1], 6); + vtmp1 = vext_u8(vrp.val[1], vrp.val[1], 1); + + vtmp = vld1q_u8(rp + 12); + vrpt = png_ptr(uint8x8x2_t,&vtmp); + vrp = *vrpt; + + vdest.val[2] = vhadd_u8(vdest.val[1], vtmp2); + vdest.val[2] = vadd_u8(vdest.val[2], vtmp3); + + vtmp2 = vext_u8(vpp.val[1], vpp.val[1], 1); + + vdest.val[3] = vhadd_u8(vdest.val[2], vtmp2); + vdest.val[3] = vadd_u8(vdest.val[3], vtmp1); + + vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[0]), 0); + rp += 3; + vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[1]), 0); + rp += 3; + vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[2]), 0); + rp += 3; + vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[3]), 0); + rp += 3; + } +} + +void +png_read_filter_row_avg4_neon(png_row_infop row_info, png_bytep row, + png_const_bytep prev_row) +{ + png_bytep rp = row; + png_bytep rp_stop = row + row_info->rowbytes; + png_const_bytep pp = prev_row; + + uint8x8x4_t vdest; + vdest.val[3] = vdup_n_u8(0); + + png_debug(1, "in png_read_filter_row_avg4_neon"); + + for (; rp < rp_stop; rp += 16, pp += 16) + { + uint32x2x4_t vtmp; + uint8x8x4_t *vrpt, *vppt; + uint8x8x4_t vrp, vpp; + uint32x2x4_t *temp_pointer; + uint32x2x4_t vdest_val; + + vtmp = vld4_u32(png_ptr(uint32_t,rp)); + vrpt = png_ptr(uint8x8x4_t,&vtmp); + vrp = *vrpt; + vtmp = vld4_u32(png_ptrc(uint32_t,pp)); + vppt = png_ptr(uint8x8x4_t,&vtmp); + vpp = *vppt; + + vdest.val[0] = vhadd_u8(vdest.val[3], vpp.val[0]); + vdest.val[0] = vadd_u8(vdest.val[0], vrp.val[0]); + vdest.val[1] = vhadd_u8(vdest.val[0], vpp.val[1]); + vdest.val[1] = vadd_u8(vdest.val[1], vrp.val[1]); + vdest.val[2] = vhadd_u8(vdest.val[1], vpp.val[2]); + vdest.val[2] = vadd_u8(vdest.val[2], vrp.val[2]); + vdest.val[3] = vhadd_u8(vdest.val[2], vpp.val[3]); + vdest.val[3] = vadd_u8(vdest.val[3], vrp.val[3]); + + vdest_val = png_ldr(uint32x2x4_t, &vdest); + vst4_lane_u32(png_ptr(uint32_t,rp), vdest_val, 0); + } +} + +static uint8x8_t +paeth(uint8x8_t a, uint8x8_t b, uint8x8_t c) +{ + uint8x8_t d, e; + uint16x8_t p1, pa, pb, pc; + + p1 = vaddl_u8(a, b); /* a + b */ + pc = vaddl_u8(c, c); /* c * 2 */ + pa = vabdl_u8(b, c); /* pa */ + pb = vabdl_u8(a, c); /* pb */ + pc = vabdq_u16(p1, pc); /* pc */ + + p1 = vcleq_u16(pa, pb); /* pa <= pb */ + pa = vcleq_u16(pa, pc); /* pa <= pc */ + pb = vcleq_u16(pb, pc); /* pb <= pc */ + + p1 = vandq_u16(p1, pa); /* pa <= pb && pa <= pc */ + + d = vmovn_u16(pb); + e = vmovn_u16(p1); + + d = vbsl_u8(d, b, c); + e = vbsl_u8(e, a, d); + + return e; +} + +void +png_read_filter_row_paeth3_neon(png_row_infop row_info, png_bytep row, + png_const_bytep prev_row) +{ + png_bytep rp = row; + png_const_bytep pp = prev_row; + png_bytep rp_stop = row + row_info->rowbytes; + + uint8x16_t vtmp; + uint8x8x2_t *vrpt; + uint8x8x2_t vrp; + uint8x8_t vlast = vdup_n_u8(0); + uint8x8x4_t vdest; + vdest.val[3] = vdup_n_u8(0); + + vtmp = vld1q_u8(rp); + vrpt = png_ptr(uint8x8x2_t,&vtmp); + vrp = *vrpt; + + png_debug(1, "in png_read_filter_row_paeth3_neon"); + + for (; rp < rp_stop; pp += 12) + { + uint8x8x2_t *vppt; + uint8x8x2_t vpp; + uint8x8_t vtmp1, vtmp2, vtmp3; + uint32x2_t *temp_pointer; + + vtmp = vld1q_u8(pp); + vppt = png_ptr(uint8x8x2_t,&vtmp); + vpp = *vppt; + + vdest.val[0] = paeth(vdest.val[3], vpp.val[0], vlast); + vdest.val[0] = vadd_u8(vdest.val[0], vrp.val[0]); + + vtmp1 = vext_u8(vrp.val[0], vrp.val[1], 3); + vtmp2 = vext_u8(vpp.val[0], vpp.val[1], 3); + vdest.val[1] = paeth(vdest.val[0], vtmp2, vpp.val[0]); + vdest.val[1] = vadd_u8(vdest.val[1], vtmp1); + + vtmp1 = vext_u8(vrp.val[0], vrp.val[1], 6); + vtmp3 = vext_u8(vpp.val[0], vpp.val[1], 6); + vdest.val[2] = paeth(vdest.val[1], vtmp3, vtmp2); + vdest.val[2] = vadd_u8(vdest.val[2], vtmp1); + + vtmp1 = vext_u8(vrp.val[1], vrp.val[1], 1); + vtmp2 = vext_u8(vpp.val[1], vpp.val[1], 1); + + vtmp = vld1q_u8(rp + 12); + vrpt = png_ptr(uint8x8x2_t,&vtmp); + vrp = *vrpt; + + vdest.val[3] = paeth(vdest.val[2], vtmp2, vtmp3); + vdest.val[3] = vadd_u8(vdest.val[3], vtmp1); + + vlast = vtmp2; + + vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[0]), 0); + rp += 3; + vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[1]), 0); + rp += 3; + vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[2]), 0); + rp += 3; + vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[3]), 0); + rp += 3; + } +} + +void +png_read_filter_row_paeth4_neon(png_row_infop row_info, png_bytep row, + png_const_bytep prev_row) +{ + png_bytep rp = row; + png_bytep rp_stop = row + row_info->rowbytes; + png_const_bytep pp = prev_row; + + uint8x8_t vlast = vdup_n_u8(0); + uint8x8x4_t vdest; + vdest.val[3] = vdup_n_u8(0); + + png_debug(1, "in png_read_filter_row_paeth4_neon"); + + for (; rp < rp_stop; rp += 16, pp += 16) + { + uint32x2x4_t vtmp; + uint8x8x4_t *vrpt, *vppt; + uint8x8x4_t vrp, vpp; + uint32x2x4_t *temp_pointer; + uint32x2x4_t vdest_val; + + vtmp = vld4_u32(png_ptr(uint32_t,rp)); + vrpt = png_ptr(uint8x8x4_t,&vtmp); + vrp = *vrpt; + vtmp = vld4_u32(png_ptrc(uint32_t,pp)); + vppt = png_ptr(uint8x8x4_t,&vtmp); + vpp = *vppt; + + vdest.val[0] = paeth(vdest.val[3], vpp.val[0], vlast); + vdest.val[0] = vadd_u8(vdest.val[0], vrp.val[0]); + vdest.val[1] = paeth(vdest.val[0], vpp.val[1], vpp.val[0]); + vdest.val[1] = vadd_u8(vdest.val[1], vrp.val[1]); + vdest.val[2] = paeth(vdest.val[1], vpp.val[2], vpp.val[1]); + vdest.val[2] = vadd_u8(vdest.val[2], vrp.val[2]); + vdest.val[3] = paeth(vdest.val[2], vpp.val[3], vpp.val[2]); + vdest.val[3] = vadd_u8(vdest.val[3], vrp.val[3]); + + vlast = vpp.val[3]; + + vdest_val = png_ldr(uint32x2x4_t, &vdest); + vst4_lane_u32(png_ptr(uint32_t,rp), vdest_val, 0); + } +} + +#endif /* PNG_ARM_NEON_OPT > 0 */ +#endif /* PNG_ARM_NEON_IMPLEMENTATION == 1 (intrinsics) */ +#endif /* READ */ diff --git a/extern/libpng/arm/palette_neon_intrinsics.c b/extern/libpng/arm/palette_neon_intrinsics.c new file mode 100644 index 0000000000..b4d1fd2abf --- /dev/null +++ b/extern/libpng/arm/palette_neon_intrinsics.c @@ -0,0 +1,149 @@ + +/* palette_neon_intrinsics.c - NEON optimised palette expansion functions + * + * Copyright (c) 2018-2019 Cosmin Truta + * Copyright (c) 2017-2018 Arm Holdings. All rights reserved. + * Written by Richard Townsend , February 2017. + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + */ + +#include "../pngpriv.h" + +#if PNG_ARM_NEON_IMPLEMENTATION == 1 + +#if defined(_MSC_VER) && defined(_M_ARM64) +# include +#else +# include +#endif + +/* Build an RGBA8 palette from the separate RGB and alpha palettes. */ +void +png_riffle_palette_neon(png_structrp png_ptr) +{ + png_const_colorp palette = png_ptr->palette; + png_bytep riffled_palette = png_ptr->riffled_palette; + png_const_bytep trans_alpha = png_ptr->trans_alpha; + int num_trans = png_ptr->num_trans; + int i; + + png_debug(1, "in png_riffle_palette_neon"); + + /* Initially black, opaque. */ + uint8x16x4_t w = {{ + vdupq_n_u8(0x00), + vdupq_n_u8(0x00), + vdupq_n_u8(0x00), + vdupq_n_u8(0xff), + }}; + + /* First, riffle the RGB colours into an RGBA8 palette. + * The alpha component is set to opaque for now. + */ + for (i = 0; i < 256; i += 16) + { + uint8x16x3_t v = vld3q_u8((png_const_bytep)(palette + i)); + w.val[0] = v.val[0]; + w.val[1] = v.val[1]; + w.val[2] = v.val[2]; + vst4q_u8(riffled_palette + (i << 2), w); + } + + /* Fix up the missing transparency values. */ + for (i = 0; i < num_trans; i++) + riffled_palette[(i << 2) + 3] = trans_alpha[i]; +} + +/* Expands a palettized row into RGBA8. */ +int +png_do_expand_palette_rgba8_neon(png_structrp png_ptr, png_row_infop row_info, + png_const_bytep row, png_bytepp ssp, png_bytepp ddp) +{ + png_uint_32 row_width = row_info->width; + const png_uint_32 *riffled_palette = + (const png_uint_32 *)png_ptr->riffled_palette; + const png_int_32 pixels_per_chunk = 4; + int i; + + png_debug(1, "in png_do_expand_palette_rgba8_neon"); + + if (row_width < pixels_per_chunk) + return 0; + + /* This function originally gets the last byte of the output row. + * The NEON part writes forward from a given position, so we have + * to seek this back by 4 pixels x 4 bytes. + */ + *ddp = *ddp - ((pixels_per_chunk * sizeof(png_uint_32)) - 1); + + for (i = 0; i < row_width; i += pixels_per_chunk) + { + uint32x4_t cur; + png_bytep sp = *ssp - i, dp = *ddp - (i << 2); + cur = vld1q_dup_u32 (riffled_palette + *(sp - 3)); + cur = vld1q_lane_u32(riffled_palette + *(sp - 2), cur, 1); + cur = vld1q_lane_u32(riffled_palette + *(sp - 1), cur, 2); + cur = vld1q_lane_u32(riffled_palette + *(sp - 0), cur, 3); + vst1q_u32((void *)dp, cur); + } + if (i != row_width) + { + /* Remove the amount that wasn't processed. */ + i -= pixels_per_chunk; + } + + /* Decrement output pointers. */ + *ssp = *ssp - i; + *ddp = *ddp - (i << 2); + return i; +} + +/* Expands a palettized row into RGB8. */ +int +png_do_expand_palette_rgb8_neon(png_structrp png_ptr, png_row_infop row_info, + png_const_bytep row, png_bytepp ssp, png_bytepp ddp) +{ + png_uint_32 row_width = row_info->width; + png_const_bytep palette = (png_const_bytep)png_ptr->palette; + const png_uint_32 pixels_per_chunk = 8; + int i; + + png_debug(1, "in png_do_expand_palette_rgb8_neon"); + + if (row_width <= pixels_per_chunk) + return 0; + + /* Seeking this back by 8 pixels x 3 bytes. */ + *ddp = *ddp - ((pixels_per_chunk * sizeof(png_color)) - 1); + + for (i = 0; i < row_width; i += pixels_per_chunk) + { + uint8x8x3_t cur; + png_bytep sp = *ssp - i, dp = *ddp - ((i << 1) + i); + cur = vld3_dup_u8(palette + sizeof(png_color) * (*(sp - 7))); + cur = vld3_lane_u8(palette + sizeof(png_color) * (*(sp - 6)), cur, 1); + cur = vld3_lane_u8(palette + sizeof(png_color) * (*(sp - 5)), cur, 2); + cur = vld3_lane_u8(palette + sizeof(png_color) * (*(sp - 4)), cur, 3); + cur = vld3_lane_u8(palette + sizeof(png_color) * (*(sp - 3)), cur, 4); + cur = vld3_lane_u8(palette + sizeof(png_color) * (*(sp - 2)), cur, 5); + cur = vld3_lane_u8(palette + sizeof(png_color) * (*(sp - 1)), cur, 6); + cur = vld3_lane_u8(palette + sizeof(png_color) * (*(sp - 0)), cur, 7); + vst3_u8((void *)dp, cur); + } + + if (i != row_width) + { + /* Remove the amount that wasn't processed. */ + i -= pixels_per_chunk; + } + + /* Decrement output pointers. */ + *ssp = *ssp - i; + *ddp = *ddp - ((i << 1) + i); + return i; +} + +#endif /* PNG_ARM_NEON_IMPLEMENTATION */ diff --git a/extern/libpng/autogen.sh b/extern/libpng/autogen.sh new file mode 100755 index 0000000000..a46daf65a8 --- /dev/null +++ b/extern/libpng/autogen.sh @@ -0,0 +1,225 @@ +#! /bin/sh +# +# Run 'autoreconf' to build 'configure', 'Makefile.in' and other configure +# control files. +# +# The first time this is run on a GIT checkout the only files that exist are +# configure.ac and Makefile.am; all of the autotools support scripts are +# missing. They are instantiated with autoreconf --force --install. +# +# For regular ("tarball") distributions all the files should exist. We do not +# want them to be updated *under any circumstances*. It should never be +# necessary to run autogen.sh because ./configure --enable-maintainer-mode says +# what to do if Makefile.am or configure.ac are changed. +# +# It is *probably* OK to update the files on a GIT checkout, because they have +# come from the local tools, but leave that to the user who is assumed to know +# whether it is ok or required. +# +# This script is intended to work without arguments, there are, however, hidden +# arguments (a) for use while testing the script and (b) to fix up systems that +# have been broken. If (b) is required the script prompts for the correct +# options. For this reason the options are *NOT* documented in the help; this +# is deliberate; UTSL. +# +clean= +maintainer= +while test $# -gt 0 +do + case "$1" in + --maintainer) + maintainer=1;; + + --clean) + clean=1;; + + *) + exec >&2 + echo "$0: usage: ./autogen.sh" + if test -d .git + then + echo " ./autogen.sh generates the configure script and" + echo " Makefile.in, or refreshes them after changes to Makefile.am" + echo " or configure.ac. You may prefer to just run autoreconf." + elif test -z "$maintainer" + then + echo " DO NOT RUN THIS SCRIPT." + echo " If you need to change Makefile.am or configure.ac then you" + echo " also need to run ./configure --enable-maintainer-mode and" + echo " use the appropriate autotools, *NOT* this script, to update" + echo " everything, please check the documentation of autoreconf." + echo " WARNING: libpng is intentionally generated with a known," + echo " fixed, set of autotools. It is known *NOT* to work with" + echo " the collection of autotools distributed on highly reputable" + echo " operating systems." + echo " Remember: autotools is GNU software, you are expected to" + echo " pay for support." + else + echo " You have run autogen.sh with --maintainer enabled and you" + echo " are not using a GIT distribution, then you have given an" + echo " unrecognized argument. This is not good. --maintainer" + echo " switches off any assumptions that you might not know what" + echo " you are doing." + fi + exit 1;; + esac + + shift +done +# +# First check for a set of the autotools files; if absent then this is assumed +# to be a GIT version and the local autotools must be used. If present this +# is a tarball distribution and the script should not be used. If partially +# present bad things are happening. +# +# The autotools generated files: +libpng_autotools_files="Makefile.in aclocal.m4 config.guess config.h.in + config.sub configure depcomp install-sh ltmain.sh missing\ + test-driver" +# +# Files generated by versions of configue >2.68 or automake >1.13 (i.e. later +# versions than those required by configure.ac): +libpng_autotools_extra="compile config.h.in~" +# +# These are separate because 'maintainer-clean' does not remove them. +libpng_libtool_files="scripts/libtool.m4 scripts/ltoptions.m4\ + scripts/ltsugar.m4 scripts/ltversion.m4 scripts/lt~obsolete.m4" + +libpng_autotools_dirs="autom4te.cache" # not required +# +# The configure generated files: +libpng_configure_files="Makefile config.h config.log config.status\ + libpng-config libpng.pc libtool stamp-h1" + +libpng_configure_dirs=".deps" +# +# We must remove the configure generated files as well as the autotools +# generated files if autotools are regenerated because otherwise if configure +# has been run without "--enable-maintainer-mode" make can do a partial update +# of Makefile. These functions do the two bits of cleaning. +clean_autotools(){ + rm -rf $libpng_autotools_files $libpng_libtool_files $libpng_autotools_dirs + rm -rf $libpng_autotools_extra +} + +clean_configure(){ + rm -rf $libpng_configure_files $libpng_configure_dirs +} +# +# Clean: remove everything (this is to help with testing) +if test -n "$clean" +then + clean_configure + if test -n "$maintainer" + then + clean_autotools + fi + + exit 0 +fi +# +# Validate the distribution. +libpng_autotools_file_found= +libpng_autotools_file_missing= +for file in $libpng_autotools_files +do + if test -f "$file" + then + libpng_autotools_file_found=1 + else + libpng_autotools_file_missing=1 + fi +done +# +# Presence of one of these does not *invalidate* missing, but absence +# invalidates found. +for file in $libpng_libtool_files +do + if test ! -f "$file" + then + libpng_autotools_file_missing=1 + fi +done +# +# The cache directory doesn't matter - it will be regenerated and does not exist +# anyway in a tarball. +# +# Either everything is missing or everything is there, the --maintainer option +# just changes this so that the mode is set to generate all the files. +mode= +if test -z "$libpng_autotools_file_found" -o -n "$maintainer" +then + mode="autoreconf" +else + if test -n "$libpng_autotools_file_missing" + then + mode="broken" + else + mode="configure" + fi +fi +# +# So: +case "$mode" in + autoreconf) + # Clean in case configure files exist + clean_configure + clean_autotools + # Everything must be initialized, so use --force + if autoreconf --warnings=all --force --install + then + missing= + for file in $libpng_autotools_files + do + test -f "$file" || missing=1 + done + # ignore the cache directory + test -z "$missing" || { + exec >&2 + echo "autoreconf was run, but did not produce all the expected" + echo "files. It is likely that your autotools installation is" + echo "not compatible with that expected by libpng." + exit 1 + } + else + exec >&2 + echo "autoreconf failed: your version of autotools is incompatible" + echo "with this libpng version. Please use a distributed archive" + echo "(which includes the autotools generated files) and run configure" + echo "instead." + exit 1 + fi;; + + configure) + if test -d .git + then + exec >&2 + echo "ERROR: running autoreconf on an initialized system" + echo " This is not necessary; it is only necessary to remake the" + echo " autotools generated files if Makefile.am or configure.ac" + echo " change and make does the right thing with:" + echo + echo " ./configure --enable-maintainer-mode." + echo + echo " You can run autoreconf yourself if you don't like maintainer" + echo " mode and you can also just run autoreconf -f -i to initialize" + echo " everything in the first place; this script is only for" + echo " compatibility with prior releases." + exit 1 + else + exec >&2 + echo "autogen.sh is intended only to generate 'configure' on systems" + echo "that do not have it. You have a complete 'configure', if you" + echo "need to change Makefile.am or configure.ac you also need to" + echo "run configure with the --enable-maintainer-mode option." + exit 1 + fi;; + + broken) + exec >&2 + echo "Your system has a partial set of autotools generated files." + echo "autogen.sh is unable to proceed. The full set of files is" + echo "contained in the libpng 'tar' distribution archive and you do" + echo "not need to run autogen.sh if you use it." + exit 1;; +esac diff --git a/extern/libpng/compile b/extern/libpng/compile new file mode 100755 index 0000000000..99e50524b3 --- /dev/null +++ b/extern/libpng/compile @@ -0,0 +1,348 @@ +#! /bin/sh +# Wrapper for compilers which do not understand '-c -o'. + +scriptversion=2018-03-07.03; # UTC + +# Copyright (C) 1999-2018 Free Software Foundation, Inc. +# Written by Tom Tromey . +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2, or (at your option) +# any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see . + +# As a special exception to the GNU General Public License, if you +# distribute this file as part of a program that contains a +# configuration script generated by Autoconf, you may include it under +# the same distribution terms that you use for the rest of that program. + +# This file is maintained in Automake, please report +# bugs to or send patches to +# . + +nl=' +' + +# We need space, tab and new line, in precisely that order. Quoting is +# there to prevent tools from complaining about whitespace usage. +IFS=" "" $nl" + +file_conv= + +# func_file_conv build_file lazy +# Convert a $build file to $host form and store it in $file +# Currently only supports Windows hosts. If the determined conversion +# type is listed in (the comma separated) LAZY, no conversion will +# take place. +func_file_conv () +{ + file=$1 + case $file in + / | /[!/]*) # absolute file, and not a UNC file + if test -z "$file_conv"; then + # lazily determine how to convert abs files + case `uname -s` in + MINGW*) + file_conv=mingw + ;; + CYGWIN*) + file_conv=cygwin + ;; + *) + file_conv=wine + ;; + esac + fi + case $file_conv/,$2, in + *,$file_conv,*) + ;; + mingw/*) + file=`cmd //C echo "$file " | sed -e 's/"\(.*\) " *$/\1/'` + ;; + cygwin/*) + file=`cygpath -m "$file" || echo "$file"` + ;; + wine/*) + file=`winepath -w "$file" || echo "$file"` + ;; + esac + ;; + esac +} + +# func_cl_dashL linkdir +# Make cl look for libraries in LINKDIR +func_cl_dashL () +{ + func_file_conv "$1" + if test -z "$lib_path"; then + lib_path=$file + else + lib_path="$lib_path;$file" + fi + linker_opts="$linker_opts -LIBPATH:$file" +} + +# func_cl_dashl library +# Do a library search-path lookup for cl +func_cl_dashl () +{ + lib=$1 + found=no + save_IFS=$IFS + IFS=';' + for dir in $lib_path $LIB + do + IFS=$save_IFS + if $shared && test -f "$dir/$lib.dll.lib"; then + found=yes + lib=$dir/$lib.dll.lib + break + fi + if test -f "$dir/$lib.lib"; then + found=yes + lib=$dir/$lib.lib + break + fi + if test -f "$dir/lib$lib.a"; then + found=yes + lib=$dir/lib$lib.a + break + fi + done + IFS=$save_IFS + + if test "$found" != yes; then + lib=$lib.lib + fi +} + +# func_cl_wrapper cl arg... +# Adjust compile command to suit cl +func_cl_wrapper () +{ + # Assume a capable shell + lib_path= + shared=: + linker_opts= + for arg + do + if test -n "$eat"; then + eat= + else + case $1 in + -o) + # configure might choose to run compile as 'compile cc -o foo foo.c'. + eat=1 + case $2 in + *.o | *.[oO][bB][jJ]) + func_file_conv "$2" + set x "$@" -Fo"$file" + shift + ;; + *) + func_file_conv "$2" + set x "$@" -Fe"$file" + shift + ;; + esac + ;; + -I) + eat=1 + func_file_conv "$2" mingw + set x "$@" -I"$file" + shift + ;; + -I*) + func_file_conv "${1#-I}" mingw + set x "$@" -I"$file" + shift + ;; + -l) + eat=1 + func_cl_dashl "$2" + set x "$@" "$lib" + shift + ;; + -l*) + func_cl_dashl "${1#-l}" + set x "$@" "$lib" + shift + ;; + -L) + eat=1 + func_cl_dashL "$2" + ;; + -L*) + func_cl_dashL "${1#-L}" + ;; + -static) + shared=false + ;; + -Wl,*) + arg=${1#-Wl,} + save_ifs="$IFS"; IFS=',' + for flag in $arg; do + IFS="$save_ifs" + linker_opts="$linker_opts $flag" + done + IFS="$save_ifs" + ;; + -Xlinker) + eat=1 + linker_opts="$linker_opts $2" + ;; + -*) + set x "$@" "$1" + shift + ;; + *.cc | *.CC | *.cxx | *.CXX | *.[cC]++) + func_file_conv "$1" + set x "$@" -Tp"$file" + shift + ;; + *.c | *.cpp | *.CPP | *.lib | *.LIB | *.Lib | *.OBJ | *.obj | *.[oO]) + func_file_conv "$1" mingw + set x "$@" "$file" + shift + ;; + *) + set x "$@" "$1" + shift + ;; + esac + fi + shift + done + if test -n "$linker_opts"; then + linker_opts="-link$linker_opts" + fi + exec "$@" $linker_opts + exit 1 +} + +eat= + +case $1 in + '') + echo "$0: No command. Try '$0 --help' for more information." 1>&2 + exit 1; + ;; + -h | --h*) + cat <<\EOF +Usage: compile [--help] [--version] PROGRAM [ARGS] + +Wrapper for compilers which do not understand '-c -o'. +Remove '-o dest.o' from ARGS, run PROGRAM with the remaining +arguments, and rename the output as expected. + +If you are trying to build a whole package this is not the +right script to run: please start by reading the file 'INSTALL'. + +Report bugs to . +EOF + exit $? + ;; + -v | --v*) + echo "compile $scriptversion" + exit $? + ;; + cl | *[/\\]cl | cl.exe | *[/\\]cl.exe | \ + icl | *[/\\]icl | icl.exe | *[/\\]icl.exe ) + func_cl_wrapper "$@" # Doesn't return... + ;; +esac + +ofile= +cfile= + +for arg +do + if test -n "$eat"; then + eat= + else + case $1 in + -o) + # configure might choose to run compile as 'compile cc -o foo foo.c'. + # So we strip '-o arg' only if arg is an object. + eat=1 + case $2 in + *.o | *.obj) + ofile=$2 + ;; + *) + set x "$@" -o "$2" + shift + ;; + esac + ;; + *.c) + cfile=$1 + set x "$@" "$1" + shift + ;; + *) + set x "$@" "$1" + shift + ;; + esac + fi + shift +done + +if test -z "$ofile" || test -z "$cfile"; then + # If no '-o' option was seen then we might have been invoked from a + # pattern rule where we don't need one. That is ok -- this is a + # normal compilation that the losing compiler can handle. If no + # '.c' file was seen then we are probably linking. That is also + # ok. + exec "$@" +fi + +# Name of file we expect compiler to create. +cofile=`echo "$cfile" | sed 's|^.*[\\/]||; s|^[a-zA-Z]:||; s/\.c$/.o/'` + +# Create the lock directory. +# Note: use '[/\\:.-]' here to ensure that we don't use the same name +# that we are using for the .o file. Also, base the name on the expected +# object file name, since that is what matters with a parallel build. +lockdir=`echo "$cofile" | sed -e 's|[/\\:.-]|_|g'`.d +while true; do + if mkdir "$lockdir" >/dev/null 2>&1; then + break + fi + sleep 1 +done +# FIXME: race condition here if user kills between mkdir and trap. +trap "rmdir '$lockdir'; exit 1" 1 2 15 + +# Run the compile. +"$@" +ret=$? + +if test -f "$cofile"; then + test "$cofile" = "$ofile" || mv "$cofile" "$ofile" +elif test -f "${cofile}bj"; then + test "${cofile}bj" = "$ofile" || mv "${cofile}bj" "$ofile" +fi + +rmdir "$lockdir" +exit $ret + +# Local Variables: +# mode: shell-script +# sh-indentation: 2 +# eval: (add-hook 'before-save-hook 'time-stamp) +# time-stamp-start: "scriptversion=" +# time-stamp-format: "%:y-%02m-%02d.%02H" +# time-stamp-time-zone: "UTC0" +# time-stamp-end: "; # UTC" +# End: diff --git a/extern/libpng/include/config.guess b/extern/libpng/config.guess old mode 100644 new mode 100755 similarity index 60% rename from extern/libpng/include/config.guess rename to extern/libpng/config.guess index 8152efd675..256083a70d --- a/extern/libpng/include/config.guess +++ b/extern/libpng/config.guess @@ -1,14 +1,12 @@ #! /bin/sh # Attempt to guess a canonical system name. -# Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, -# 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, -# 2011 Free Software Foundation, Inc. +# Copyright 1992-2018 Free Software Foundation, Inc. -timestamp='2011-11-11' +timestamp='2018-03-08' # This file is free software; you can redistribute it and/or modify it # under the terms of the GNU General Public License as published by -# the Free Software Foundation; either version 2 of the License, or +# the Free Software Foundation; either version 3 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, but @@ -17,26 +15,22 @@ timestamp='2011-11-11' # General Public License for more details. # # You should have received a copy of the GNU General Public License -# along with this program; if not, write to the Free Software -# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA -# 02110-1301, USA. +# along with this program; if not, see . # # As a special exception to the GNU General Public License, if you # distribute this file as part of a program that contains a # configuration script generated by Autoconf, you may include it under -# the same distribution terms that you use for the rest of that program. - - -# Originally written by Per Bothner. Please send patches (context -# diff format) to and include a ChangeLog -# entry. +# the same distribution terms that you use for the rest of that +# program. This Exception is an additional permission under section 7 +# of the GNU General Public License, version 3 ("GPLv3"). # -# This script attempts to guess a canonical system name similar to -# config.sub. If it succeeds, it prints the system name on stdout, and -# exits with 0. Otherwise, it exits with 1. +# Originally written by Per Bothner; maintained since 2000 by Ben Elliston. # # You can get the latest version of this script from: -# http://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.guess;hb=HEAD +# https://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.guess +# +# Please send patches to . + me=`echo "$0" | sed -e 's,.*/,,'` @@ -45,7 +39,7 @@ Usage: $0 [OPTION] Output the configuration name of the system \`$me' is run on. -Operation modes: +Options: -h, --help print this help, then exit -t, --time-stamp print date of last modification, then exit -v, --version print version number, then exit @@ -56,9 +50,7 @@ version="\ GNU config.guess ($timestamp) Originally written by Per Bothner. -Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, -2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free -Software Foundation, Inc. +Copyright 1992-2018 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE." @@ -115,9 +107,9 @@ trap "rm -f \$tmpfiles 2>/dev/null; rmdir \$tmp 2>/dev/null; exit 1" 1 2 13 15 ; dummy=$tmp/dummy ; tmpfiles="$dummy.c $dummy.o $dummy.rel $dummy" ; case $CC_FOR_BUILD,$HOST_CC,$CC in - ,,) echo "int x;" > $dummy.c ; + ,,) echo "int x;" > "$dummy.c" ; for c in cc gcc c89 c99 ; do - if ($c -c -o $dummy.o $dummy.c) >/dev/null 2>&1 ; then + if ($c -c -o "$dummy.o" "$dummy.c") >/dev/null 2>&1 ; then CC_FOR_BUILD="$c"; break ; fi ; done ; @@ -140,12 +132,40 @@ UNAME_RELEASE=`(uname -r) 2>/dev/null` || UNAME_RELEASE=unknown UNAME_SYSTEM=`(uname -s) 2>/dev/null` || UNAME_SYSTEM=unknown UNAME_VERSION=`(uname -v) 2>/dev/null` || UNAME_VERSION=unknown +case "$UNAME_SYSTEM" in +Linux|GNU|GNU/*) + # If the system lacks a compiler, then just pick glibc. + # We could probably try harder. + LIBC=gnu + + eval "$set_cc_for_build" + cat <<-EOF > "$dummy.c" + #include + #if defined(__UCLIBC__) + LIBC=uclibc + #elif defined(__dietlibc__) + LIBC=dietlibc + #else + LIBC=gnu + #endif + EOF + eval "`$CC_FOR_BUILD -E "$dummy.c" 2>/dev/null | grep '^LIBC' | sed 's, ,,g'`" + + # If ldd exists, use it to detect musl libc. + if command -v ldd >/dev/null && \ + ldd --version 2>&1 | grep -q ^musl + then + LIBC=musl + fi + ;; +esac + # Note: order is significant - the case branches are not exclusive. -case "${UNAME_MACHINE}:${UNAME_SYSTEM}:${UNAME_RELEASE}:${UNAME_VERSION}" in +case "$UNAME_MACHINE:$UNAME_SYSTEM:$UNAME_RELEASE:$UNAME_VERSION" in *:NetBSD:*:*) # NetBSD (nbsd) targets should (where applicable) match one or - # more of the tupples: *-*-netbsdelf*, *-*-netbsdaout*, + # more of the tuples: *-*-netbsdelf*, *-*-netbsdaout*, # *-*-netbsdecoff* and *-*-netbsd*. For targets that recently # switched to ELF, *-*-netbsd* would select the old # object file format. This provides both forward @@ -155,21 +175,31 @@ case "${UNAME_MACHINE}:${UNAME_SYSTEM}:${UNAME_RELEASE}:${UNAME_VERSION}" in # Note: NetBSD doesn't particularly care about the vendor # portion of the name. We always set it to "unknown". sysctl="sysctl -n hw.machine_arch" - UNAME_MACHINE_ARCH=`(/sbin/$sysctl 2>/dev/null || \ - /usr/sbin/$sysctl 2>/dev/null || echo unknown)` - case "${UNAME_MACHINE_ARCH}" in + UNAME_MACHINE_ARCH=`(uname -p 2>/dev/null || \ + "/sbin/$sysctl" 2>/dev/null || \ + "/usr/sbin/$sysctl" 2>/dev/null || \ + echo unknown)` + case "$UNAME_MACHINE_ARCH" in armeb) machine=armeb-unknown ;; arm*) machine=arm-unknown ;; sh3el) machine=shl-unknown ;; sh3eb) machine=sh-unknown ;; sh5el) machine=sh5le-unknown ;; - *) machine=${UNAME_MACHINE_ARCH}-unknown ;; + earmv*) + arch=`echo "$UNAME_MACHINE_ARCH" | sed -e 's,^e\(armv[0-9]\).*$,\1,'` + endian=`echo "$UNAME_MACHINE_ARCH" | sed -ne 's,^.*\(eb\)$,\1,p'` + machine="${arch}${endian}"-unknown + ;; + *) machine="$UNAME_MACHINE_ARCH"-unknown ;; esac # The Operating System including object format, if it has switched - # to ELF recently, or will in the future. - case "${UNAME_MACHINE_ARCH}" in + # to ELF recently (or will in the future) and ABI. + case "$UNAME_MACHINE_ARCH" in + earm*) + os=netbsdelf + ;; arm*|i386|m68k|ns32k|sh3*|sparc|vax) - eval $set_cc_for_build + eval "$set_cc_for_build" if echo __ELF__ | $CC_FOR_BUILD -E - 2>/dev/null \ | grep -q __ELF__ then @@ -184,40 +214,67 @@ case "${UNAME_MACHINE}:${UNAME_SYSTEM}:${UNAME_RELEASE}:${UNAME_VERSION}" in os=netbsd ;; esac + # Determine ABI tags. + case "$UNAME_MACHINE_ARCH" in + earm*) + expr='s/^earmv[0-9]/-eabi/;s/eb$//' + abi=`echo "$UNAME_MACHINE_ARCH" | sed -e "$expr"` + ;; + esac # The OS release # Debian GNU/NetBSD machines have a different userland, and # thus, need a distinct triplet. However, they do not need # kernel version information, so it can be replaced with a # suitable tag, in the style of linux-gnu. - case "${UNAME_VERSION}" in + case "$UNAME_VERSION" in Debian*) release='-gnu' ;; *) - release=`echo ${UNAME_RELEASE}|sed -e 's/[-_].*/\./'` + release=`echo "$UNAME_RELEASE" | sed -e 's/[-_].*//' | cut -d. -f1,2` ;; esac # Since CPU_TYPE-MANUFACTURER-KERNEL-OPERATING_SYSTEM: # contains redundant information, the shorter form: # CPU_TYPE-MANUFACTURER-OPERATING_SYSTEM is used. - echo "${machine}-${os}${release}" + echo "$machine-${os}${release}${abi}" + exit ;; + *:Bitrig:*:*) + UNAME_MACHINE_ARCH=`arch | sed 's/Bitrig.//'` + echo "$UNAME_MACHINE_ARCH"-unknown-bitrig"$UNAME_RELEASE" exit ;; *:OpenBSD:*:*) UNAME_MACHINE_ARCH=`arch | sed 's/OpenBSD.//'` - echo ${UNAME_MACHINE_ARCH}-unknown-openbsd${UNAME_RELEASE} + echo "$UNAME_MACHINE_ARCH"-unknown-openbsd"$UNAME_RELEASE" + exit ;; + *:LibertyBSD:*:*) + UNAME_MACHINE_ARCH=`arch | sed 's/^.*BSD\.//'` + echo "$UNAME_MACHINE_ARCH"-unknown-libertybsd"$UNAME_RELEASE" + exit ;; + *:MidnightBSD:*:*) + echo "$UNAME_MACHINE"-unknown-midnightbsd"$UNAME_RELEASE" exit ;; *:ekkoBSD:*:*) - echo ${UNAME_MACHINE}-unknown-ekkobsd${UNAME_RELEASE} + echo "$UNAME_MACHINE"-unknown-ekkobsd"$UNAME_RELEASE" exit ;; *:SolidBSD:*:*) - echo ${UNAME_MACHINE}-unknown-solidbsd${UNAME_RELEASE} + echo "$UNAME_MACHINE"-unknown-solidbsd"$UNAME_RELEASE" exit ;; macppc:MirBSD:*:*) - echo powerpc-unknown-mirbsd${UNAME_RELEASE} + echo powerpc-unknown-mirbsd"$UNAME_RELEASE" exit ;; *:MirBSD:*:*) - echo ${UNAME_MACHINE}-unknown-mirbsd${UNAME_RELEASE} + echo "$UNAME_MACHINE"-unknown-mirbsd"$UNAME_RELEASE" exit ;; + *:Sortix:*:*) + echo "$UNAME_MACHINE"-unknown-sortix + exit ;; + *:Redox:*:*) + echo "$UNAME_MACHINE"-unknown-redox + exit ;; + mips:OSF1:*.*) + echo mips-dec-osf1 + exit ;; alpha:OSF1:*:*) case $UNAME_RELEASE in *4.0) @@ -234,63 +291,54 @@ case "${UNAME_MACHINE}:${UNAME_SYSTEM}:${UNAME_RELEASE}:${UNAME_VERSION}" in ALPHA_CPU_TYPE=`/usr/sbin/psrinfo -v | sed -n -e 's/^ The alpha \(.*\) processor.*$/\1/p' | head -n 1` case "$ALPHA_CPU_TYPE" in "EV4 (21064)") - UNAME_MACHINE="alpha" ;; + UNAME_MACHINE=alpha ;; "EV4.5 (21064)") - UNAME_MACHINE="alpha" ;; + UNAME_MACHINE=alpha ;; "LCA4 (21066/21068)") - UNAME_MACHINE="alpha" ;; + UNAME_MACHINE=alpha ;; "EV5 (21164)") - UNAME_MACHINE="alphaev5" ;; + UNAME_MACHINE=alphaev5 ;; "EV5.6 (21164A)") - UNAME_MACHINE="alphaev56" ;; + UNAME_MACHINE=alphaev56 ;; "EV5.6 (21164PC)") - UNAME_MACHINE="alphapca56" ;; + UNAME_MACHINE=alphapca56 ;; "EV5.7 (21164PC)") - UNAME_MACHINE="alphapca57" ;; + UNAME_MACHINE=alphapca57 ;; "EV6 (21264)") - UNAME_MACHINE="alphaev6" ;; + UNAME_MACHINE=alphaev6 ;; "EV6.7 (21264A)") - UNAME_MACHINE="alphaev67" ;; + UNAME_MACHINE=alphaev67 ;; "EV6.8CB (21264C)") - UNAME_MACHINE="alphaev68" ;; + UNAME_MACHINE=alphaev68 ;; "EV6.8AL (21264B)") - UNAME_MACHINE="alphaev68" ;; + UNAME_MACHINE=alphaev68 ;; "EV6.8CX (21264D)") - UNAME_MACHINE="alphaev68" ;; + UNAME_MACHINE=alphaev68 ;; "EV6.9A (21264/EV69A)") - UNAME_MACHINE="alphaev69" ;; + UNAME_MACHINE=alphaev69 ;; "EV7 (21364)") - UNAME_MACHINE="alphaev7" ;; + UNAME_MACHINE=alphaev7 ;; "EV7.9 (21364A)") - UNAME_MACHINE="alphaev79" ;; + UNAME_MACHINE=alphaev79 ;; esac # A Pn.n version is a patched version. # A Vn.n version is a released version. # A Tn.n version is a released field test version. # A Xn.n version is an unreleased experimental baselevel. # 1.2 uses "1.2" for uname -r. - echo ${UNAME_MACHINE}-dec-osf`echo ${UNAME_RELEASE} | sed -e 's/^[PVTX]//' | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz'` + echo "$UNAME_MACHINE"-dec-osf"`echo "$UNAME_RELEASE" | sed -e 's/^[PVTX]//' | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz`" # Reset EXIT trap before exiting to avoid spurious non-zero exit code. exitcode=$? trap '' 0 exit $exitcode ;; - Alpha\ *:Windows_NT*:*) - # How do we know it's Interix rather than the generic POSIX subsystem? - # Should we change UNAME_MACHINE based on the output of uname instead - # of the specific Alpha model? - echo alpha-pc-interix - exit ;; - 21064:Windows_NT:50:3) - echo alpha-dec-winnt3.5 - exit ;; Amiga*:UNIX_System_V:4.0:*) echo m68k-unknown-sysv4 exit ;; *:[Aa]miga[Oo][Ss]:*:*) - echo ${UNAME_MACHINE}-unknown-amigaos + echo "$UNAME_MACHINE"-unknown-amigaos exit ;; *:[Mm]orph[Oo][Ss]:*:*) - echo ${UNAME_MACHINE}-unknown-morphos + echo "$UNAME_MACHINE"-unknown-morphos exit ;; *:OS/390:*:*) echo i370-ibm-openedition @@ -302,9 +350,9 @@ case "${UNAME_MACHINE}:${UNAME_SYSTEM}:${UNAME_RELEASE}:${UNAME_VERSION}" in echo powerpc-ibm-os400 exit ;; arm:RISC*:1.[012]*:*|arm:riscix:1.[012]*:*) - echo arm-acorn-riscix${UNAME_RELEASE} + echo arm-acorn-riscix"$UNAME_RELEASE" exit ;; - arm:riscos:*:*|arm:RISCOS:*:*) + arm*:riscos:*:*|arm*:RISCOS:*:*) echo arm-unknown-riscos exit ;; SR2?01:HI-UX/MPP:*:* | SR8000:HI-UX/MPP:*:*) @@ -329,38 +377,38 @@ case "${UNAME_MACHINE}:${UNAME_SYSTEM}:${UNAME_RELEASE}:${UNAME_VERSION}" in sparc) echo sparc-icl-nx7; exit ;; esac ;; s390x:SunOS:*:*) - echo ${UNAME_MACHINE}-ibm-solaris2`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'` + echo "$UNAME_MACHINE"-ibm-solaris2"`echo "$UNAME_RELEASE" | sed -e 's/[^.]*//'`" exit ;; sun4H:SunOS:5.*:*) - echo sparc-hal-solaris2`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'` + echo sparc-hal-solaris2"`echo "$UNAME_RELEASE"|sed -e 's/[^.]*//'`" exit ;; sun4*:SunOS:5.*:* | tadpole*:SunOS:5.*:*) - echo sparc-sun-solaris2`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'` + echo sparc-sun-solaris2"`echo "$UNAME_RELEASE" | sed -e 's/[^.]*//'`" exit ;; i86pc:AuroraUX:5.*:* | i86xen:AuroraUX:5.*:*) - echo i386-pc-auroraux${UNAME_RELEASE} + echo i386-pc-auroraux"$UNAME_RELEASE" exit ;; i86pc:SunOS:5.*:* | i86xen:SunOS:5.*:*) - eval $set_cc_for_build - SUN_ARCH="i386" + eval "$set_cc_for_build" + SUN_ARCH=i386 # If there is a compiler, see if it is configured for 64-bit objects. # Note that the Sun cc does not turn __LP64__ into 1 like gcc does. # This test works for both compilers. - if [ "$CC_FOR_BUILD" != 'no_compiler_found' ]; then + if [ "$CC_FOR_BUILD" != no_compiler_found ]; then if (echo '#ifdef __amd64'; echo IS_64BIT_ARCH; echo '#endif') | \ - (CCOPTS= $CC_FOR_BUILD -E - 2>/dev/null) | \ + (CCOPTS="" $CC_FOR_BUILD -E - 2>/dev/null) | \ grep IS_64BIT_ARCH >/dev/null then - SUN_ARCH="x86_64" + SUN_ARCH=x86_64 fi fi - echo ${SUN_ARCH}-pc-solaris2`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'` + echo "$SUN_ARCH"-pc-solaris2"`echo "$UNAME_RELEASE"|sed -e 's/[^.]*//'`" exit ;; sun4*:SunOS:6*:*) # According to config.sub, this is the proper way to canonicalize # SunOS6. Hard to guess exactly what SunOS6 will be like, but # it's likely to be more like Solaris than SunOS4. - echo sparc-sun-solaris3`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'` + echo sparc-sun-solaris3"`echo "$UNAME_RELEASE"|sed -e 's/[^.]*//'`" exit ;; sun4*:SunOS:*:*) case "`/usr/bin/arch -k`" in @@ -369,25 +417,25 @@ case "${UNAME_MACHINE}:${UNAME_SYSTEM}:${UNAME_RELEASE}:${UNAME_VERSION}" in ;; esac # Japanese Language versions have a version number like `4.1.3-JL'. - echo sparc-sun-sunos`echo ${UNAME_RELEASE}|sed -e 's/-/_/'` + echo sparc-sun-sunos"`echo "$UNAME_RELEASE"|sed -e 's/-/_/'`" exit ;; sun3*:SunOS:*:*) - echo m68k-sun-sunos${UNAME_RELEASE} + echo m68k-sun-sunos"$UNAME_RELEASE" exit ;; sun*:*:4.2BSD:*) UNAME_RELEASE=`(sed 1q /etc/motd | awk '{print substr($5,1,3)}') 2>/dev/null` - test "x${UNAME_RELEASE}" = "x" && UNAME_RELEASE=3 + test "x$UNAME_RELEASE" = x && UNAME_RELEASE=3 case "`/bin/arch`" in sun3) - echo m68k-sun-sunos${UNAME_RELEASE} + echo m68k-sun-sunos"$UNAME_RELEASE" ;; sun4) - echo sparc-sun-sunos${UNAME_RELEASE} + echo sparc-sun-sunos"$UNAME_RELEASE" ;; esac exit ;; aushp:SunOS:*:*) - echo sparc-auspex-sunos${UNAME_RELEASE} + echo sparc-auspex-sunos"$UNAME_RELEASE" exit ;; # The situation for MiNT is a little confusing. The machine name # can be virtually everything (everything which is not @@ -398,44 +446,44 @@ case "${UNAME_MACHINE}:${UNAME_SYSTEM}:${UNAME_RELEASE}:${UNAME_VERSION}" in # MiNT. But MiNT is downward compatible to TOS, so this should # be no problem. atarist[e]:*MiNT:*:* | atarist[e]:*mint:*:* | atarist[e]:*TOS:*:*) - echo m68k-atari-mint${UNAME_RELEASE} + echo m68k-atari-mint"$UNAME_RELEASE" exit ;; atari*:*MiNT:*:* | atari*:*mint:*:* | atarist[e]:*TOS:*:*) - echo m68k-atari-mint${UNAME_RELEASE} + echo m68k-atari-mint"$UNAME_RELEASE" exit ;; *falcon*:*MiNT:*:* | *falcon*:*mint:*:* | *falcon*:*TOS:*:*) - echo m68k-atari-mint${UNAME_RELEASE} + echo m68k-atari-mint"$UNAME_RELEASE" exit ;; milan*:*MiNT:*:* | milan*:*mint:*:* | *milan*:*TOS:*:*) - echo m68k-milan-mint${UNAME_RELEASE} + echo m68k-milan-mint"$UNAME_RELEASE" exit ;; hades*:*MiNT:*:* | hades*:*mint:*:* | *hades*:*TOS:*:*) - echo m68k-hades-mint${UNAME_RELEASE} + echo m68k-hades-mint"$UNAME_RELEASE" exit ;; *:*MiNT:*:* | *:*mint:*:* | *:*TOS:*:*) - echo m68k-unknown-mint${UNAME_RELEASE} + echo m68k-unknown-mint"$UNAME_RELEASE" exit ;; m68k:machten:*:*) - echo m68k-apple-machten${UNAME_RELEASE} + echo m68k-apple-machten"$UNAME_RELEASE" exit ;; powerpc:machten:*:*) - echo powerpc-apple-machten${UNAME_RELEASE} + echo powerpc-apple-machten"$UNAME_RELEASE" exit ;; RISC*:Mach:*:*) echo mips-dec-mach_bsd4.3 exit ;; RISC*:ULTRIX:*:*) - echo mips-dec-ultrix${UNAME_RELEASE} + echo mips-dec-ultrix"$UNAME_RELEASE" exit ;; VAX*:ULTRIX*:*:*) - echo vax-dec-ultrix${UNAME_RELEASE} + echo vax-dec-ultrix"$UNAME_RELEASE" exit ;; 2020:CLIX:*:* | 2430:CLIX:*:*) - echo clipper-intergraph-clix${UNAME_RELEASE} + echo clipper-intergraph-clix"$UNAME_RELEASE" exit ;; mips:*:*:UMIPS | mips:*:*:RISCos) - eval $set_cc_for_build - sed 's/^ //' << EOF >$dummy.c + eval "$set_cc_for_build" + sed 's/^ //' << EOF > "$dummy.c" #ifdef __cplusplus #include /* for printf() prototype */ int main (int argc, char *argv[]) { @@ -444,23 +492,23 @@ case "${UNAME_MACHINE}:${UNAME_SYSTEM}:${UNAME_RELEASE}:${UNAME_VERSION}" in #endif #if defined (host_mips) && defined (MIPSEB) #if defined (SYSTYPE_SYSV) - printf ("mips-mips-riscos%ssysv\n", argv[1]); exit (0); + printf ("mips-mips-riscos%ssysv\\n", argv[1]); exit (0); #endif #if defined (SYSTYPE_SVR4) - printf ("mips-mips-riscos%ssvr4\n", argv[1]); exit (0); + printf ("mips-mips-riscos%ssvr4\\n", argv[1]); exit (0); #endif #if defined (SYSTYPE_BSD43) || defined(SYSTYPE_BSD) - printf ("mips-mips-riscos%sbsd\n", argv[1]); exit (0); + printf ("mips-mips-riscos%sbsd\\n", argv[1]); exit (0); #endif #endif exit (-1); } EOF - $CC_FOR_BUILD -o $dummy $dummy.c && - dummyarg=`echo "${UNAME_RELEASE}" | sed -n 's/\([0-9]*\).*/\1/p'` && - SYSTEM_NAME=`$dummy $dummyarg` && + $CC_FOR_BUILD -o "$dummy" "$dummy.c" && + dummyarg=`echo "$UNAME_RELEASE" | sed -n 's/\([0-9]*\).*/\1/p'` && + SYSTEM_NAME=`"$dummy" "$dummyarg"` && { echo "$SYSTEM_NAME"; exit; } - echo mips-mips-riscos${UNAME_RELEASE} + echo mips-mips-riscos"$UNAME_RELEASE" exit ;; Motorola:PowerMAX_OS:*:*) echo powerpc-motorola-powermax @@ -486,17 +534,17 @@ EOF AViiON:dgux:*:*) # DG/UX returns AViiON for all architectures UNAME_PROCESSOR=`/usr/bin/uname -p` - if [ $UNAME_PROCESSOR = mc88100 ] || [ $UNAME_PROCESSOR = mc88110 ] + if [ "$UNAME_PROCESSOR" = mc88100 ] || [ "$UNAME_PROCESSOR" = mc88110 ] then - if [ ${TARGET_BINARY_INTERFACE}x = m88kdguxelfx ] || \ - [ ${TARGET_BINARY_INTERFACE}x = x ] + if [ "$TARGET_BINARY_INTERFACE"x = m88kdguxelfx ] || \ + [ "$TARGET_BINARY_INTERFACE"x = x ] then - echo m88k-dg-dgux${UNAME_RELEASE} + echo m88k-dg-dgux"$UNAME_RELEASE" else - echo m88k-dg-dguxbcs${UNAME_RELEASE} + echo m88k-dg-dguxbcs"$UNAME_RELEASE" fi else - echo i586-dg-dgux${UNAME_RELEASE} + echo i586-dg-dgux"$UNAME_RELEASE" fi exit ;; M88*:DolphinOS:*:*) # DolphinOS (SVR3) @@ -513,7 +561,7 @@ EOF echo m68k-tektronix-bsd exit ;; *:IRIX*:*:*) - echo mips-sgi-irix`echo ${UNAME_RELEASE}|sed -e 's/-/_/g'` + echo mips-sgi-irix"`echo "$UNAME_RELEASE"|sed -e 's/-/_/g'`" exit ;; ????????:AIX?:[12].1:2) # AIX 2.2.1 or AIX 2.1.1 is RT/PC AIX. echo romp-ibm-aix # uname -m gives an 8 hex-code CPU id @@ -525,14 +573,14 @@ EOF if [ -x /usr/bin/oslevel ] ; then IBM_REV=`/usr/bin/oslevel` else - IBM_REV=${UNAME_VERSION}.${UNAME_RELEASE} + IBM_REV="$UNAME_VERSION.$UNAME_RELEASE" fi - echo ${UNAME_MACHINE}-ibm-aix${IBM_REV} + echo "$UNAME_MACHINE"-ibm-aix"$IBM_REV" exit ;; *:AIX:2:3) if grep bos325 /usr/include/stdio.h >/dev/null 2>&1; then - eval $set_cc_for_build - sed 's/^ //' << EOF >$dummy.c + eval "$set_cc_for_build" + sed 's/^ //' << EOF > "$dummy.c" #include main() @@ -543,7 +591,7 @@ EOF exit(0); } EOF - if $CC_FOR_BUILD -o $dummy $dummy.c && SYSTEM_NAME=`$dummy` + if $CC_FOR_BUILD -o "$dummy" "$dummy.c" && SYSTEM_NAME=`"$dummy"` then echo "$SYSTEM_NAME" else @@ -557,26 +605,27 @@ EOF exit ;; *:AIX:*:[4567]) IBM_CPU_ID=`/usr/sbin/lsdev -C -c processor -S available | sed 1q | awk '{ print $1 }'` - if /usr/sbin/lsattr -El ${IBM_CPU_ID} | grep ' POWER' >/dev/null 2>&1; then + if /usr/sbin/lsattr -El "$IBM_CPU_ID" | grep ' POWER' >/dev/null 2>&1; then IBM_ARCH=rs6000 else IBM_ARCH=powerpc fi - if [ -x /usr/bin/oslevel ] ; then - IBM_REV=`/usr/bin/oslevel` + if [ -x /usr/bin/lslpp ] ; then + IBM_REV=`/usr/bin/lslpp -Lqc bos.rte.libc | + awk -F: '{ print $3 }' | sed s/[0-9]*$/0/` else - IBM_REV=${UNAME_VERSION}.${UNAME_RELEASE} + IBM_REV="$UNAME_VERSION.$UNAME_RELEASE" fi - echo ${IBM_ARCH}-ibm-aix${IBM_REV} + echo "$IBM_ARCH"-ibm-aix"$IBM_REV" exit ;; *:AIX:*:*) echo rs6000-ibm-aix exit ;; - ibmrt:4.4BSD:*|romp-ibm:BSD:*) + ibmrt:4.4BSD:*|romp-ibm:4.4BSD:*) echo romp-ibm-bsd4.4 exit ;; ibmrt:*BSD:*|romp-ibm:BSD:*) # covers RT/PC BSD and - echo romp-ibm-bsd${UNAME_RELEASE} # 4.3 with uname added to + echo romp-ibm-bsd"$UNAME_RELEASE" # 4.3 with uname added to exit ;; # report: romp-ibm BSD 4.3 *:BOSX:*:*) echo rs6000-bull-bosx @@ -591,28 +640,28 @@ EOF echo m68k-hp-bsd4.4 exit ;; 9000/[34678]??:HP-UX:*:*) - HPUX_REV=`echo ${UNAME_RELEASE}|sed -e 's/[^.]*.[0B]*//'` - case "${UNAME_MACHINE}" in - 9000/31? ) HP_ARCH=m68000 ;; - 9000/[34]?? ) HP_ARCH=m68k ;; + HPUX_REV=`echo "$UNAME_RELEASE"|sed -e 's/[^.]*.[0B]*//'` + case "$UNAME_MACHINE" in + 9000/31?) HP_ARCH=m68000 ;; + 9000/[34]??) HP_ARCH=m68k ;; 9000/[678][0-9][0-9]) if [ -x /usr/bin/getconf ]; then sc_cpu_version=`/usr/bin/getconf SC_CPU_VERSION 2>/dev/null` sc_kernel_bits=`/usr/bin/getconf SC_KERNEL_BITS 2>/dev/null` - case "${sc_cpu_version}" in - 523) HP_ARCH="hppa1.0" ;; # CPU_PA_RISC1_0 - 528) HP_ARCH="hppa1.1" ;; # CPU_PA_RISC1_1 + case "$sc_cpu_version" in + 523) HP_ARCH=hppa1.0 ;; # CPU_PA_RISC1_0 + 528) HP_ARCH=hppa1.1 ;; # CPU_PA_RISC1_1 532) # CPU_PA_RISC2_0 - case "${sc_kernel_bits}" in - 32) HP_ARCH="hppa2.0n" ;; - 64) HP_ARCH="hppa2.0w" ;; - '') HP_ARCH="hppa2.0" ;; # HP-UX 10.20 + case "$sc_kernel_bits" in + 32) HP_ARCH=hppa2.0n ;; + 64) HP_ARCH=hppa2.0w ;; + '') HP_ARCH=hppa2.0 ;; # HP-UX 10.20 esac ;; esac fi - if [ "${HP_ARCH}" = "" ]; then - eval $set_cc_for_build - sed 's/^ //' << EOF >$dummy.c + if [ "$HP_ARCH" = "" ]; then + eval "$set_cc_for_build" + sed 's/^ //' << EOF > "$dummy.c" #define _HPUX_SOURCE #include @@ -645,13 +694,13 @@ EOF exit (0); } EOF - (CCOPTS= $CC_FOR_BUILD -o $dummy $dummy.c 2>/dev/null) && HP_ARCH=`$dummy` + (CCOPTS="" $CC_FOR_BUILD -o "$dummy" "$dummy.c" 2>/dev/null) && HP_ARCH=`"$dummy"` test -z "$HP_ARCH" && HP_ARCH=hppa fi ;; esac - if [ ${HP_ARCH} = "hppa2.0w" ] + if [ "$HP_ARCH" = hppa2.0w ] then - eval $set_cc_for_build + eval "$set_cc_for_build" # hppa2.0w-hp-hpux* has a 64-bit kernel and a compiler generating # 32-bit code. hppa64-hp-hpux* has the same kernel and a compiler @@ -662,23 +711,23 @@ EOF # $ CC_FOR_BUILD="cc +DA2.0w" ./config.guess # => hppa64-hp-hpux11.23 - if echo __LP64__ | (CCOPTS= $CC_FOR_BUILD -E - 2>/dev/null) | + if echo __LP64__ | (CCOPTS="" $CC_FOR_BUILD -E - 2>/dev/null) | grep -q __LP64__ then - HP_ARCH="hppa2.0w" + HP_ARCH=hppa2.0w else - HP_ARCH="hppa64" + HP_ARCH=hppa64 fi fi - echo ${HP_ARCH}-hp-hpux${HPUX_REV} + echo "$HP_ARCH"-hp-hpux"$HPUX_REV" exit ;; ia64:HP-UX:*:*) - HPUX_REV=`echo ${UNAME_RELEASE}|sed -e 's/[^.]*.[0B]*//'` - echo ia64-hp-hpux${HPUX_REV} + HPUX_REV=`echo "$UNAME_RELEASE"|sed -e 's/[^.]*.[0B]*//'` + echo ia64-hp-hpux"$HPUX_REV" exit ;; 3050*:HI-UX:*:*) - eval $set_cc_for_build - sed 's/^ //' << EOF >$dummy.c + eval "$set_cc_for_build" + sed 's/^ //' << EOF > "$dummy.c" #include int main () @@ -703,11 +752,11 @@ EOF exit (0); } EOF - $CC_FOR_BUILD -o $dummy $dummy.c && SYSTEM_NAME=`$dummy` && + $CC_FOR_BUILD -o "$dummy" "$dummy.c" && SYSTEM_NAME=`"$dummy"` && { echo "$SYSTEM_NAME"; exit; } echo unknown-hitachi-hiuxwe2 exit ;; - 9000/7??:4.3bsd:*:* | 9000/8?[79]:4.3bsd:*:* ) + 9000/7??:4.3bsd:*:* | 9000/8?[79]:4.3bsd:*:*) echo hppa1.1-hp-bsd exit ;; 9000/8??:4.3bsd:*:*) @@ -716,7 +765,7 @@ EOF *9??*:MPE/iX:*:* | *3000*:MPE/iX:*:*) echo hppa1.0-hp-mpeix exit ;; - hp7??:OSF1:*:* | hp8?[79]:OSF1:*:* ) + hp7??:OSF1:*:* | hp8?[79]:OSF1:*:*) echo hppa1.1-hp-osf exit ;; hp8??:OSF1:*:*) @@ -724,9 +773,9 @@ EOF exit ;; i*86:OSF1:*:*) if [ -x /usr/sbin/sysversion ] ; then - echo ${UNAME_MACHINE}-unknown-osf1mk + echo "$UNAME_MACHINE"-unknown-osf1mk else - echo ${UNAME_MACHINE}-unknown-osf1 + echo "$UNAME_MACHINE"-unknown-osf1 fi exit ;; parisc*:Lites*:*:*) @@ -751,117 +800,109 @@ EOF echo c4-convex-bsd exit ;; CRAY*Y-MP:*:*:*) - echo ymp-cray-unicos${UNAME_RELEASE} | sed -e 's/\.[^.]*$/.X/' + echo ymp-cray-unicos"$UNAME_RELEASE" | sed -e 's/\.[^.]*$/.X/' exit ;; CRAY*[A-Z]90:*:*:*) - echo ${UNAME_MACHINE}-cray-unicos${UNAME_RELEASE} \ + echo "$UNAME_MACHINE"-cray-unicos"$UNAME_RELEASE" \ | sed -e 's/CRAY.*\([A-Z]90\)/\1/' \ -e y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/ \ -e 's/\.[^.]*$/.X/' exit ;; CRAY*TS:*:*:*) - echo t90-cray-unicos${UNAME_RELEASE} | sed -e 's/\.[^.]*$/.X/' + echo t90-cray-unicos"$UNAME_RELEASE" | sed -e 's/\.[^.]*$/.X/' exit ;; CRAY*T3E:*:*:*) - echo alphaev5-cray-unicosmk${UNAME_RELEASE} | sed -e 's/\.[^.]*$/.X/' + echo alphaev5-cray-unicosmk"$UNAME_RELEASE" | sed -e 's/\.[^.]*$/.X/' exit ;; CRAY*SV1:*:*:*) - echo sv1-cray-unicos${UNAME_RELEASE} | sed -e 's/\.[^.]*$/.X/' + echo sv1-cray-unicos"$UNAME_RELEASE" | sed -e 's/\.[^.]*$/.X/' exit ;; *:UNICOS/mp:*:*) - echo craynv-cray-unicosmp${UNAME_RELEASE} | sed -e 's/\.[^.]*$/.X/' + echo craynv-cray-unicosmp"$UNAME_RELEASE" | sed -e 's/\.[^.]*$/.X/' exit ;; F30[01]:UNIX_System_V:*:* | F700:UNIX_System_V:*:*) - FUJITSU_PROC=`uname -m | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz'` - FUJITSU_SYS=`uname -p | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz' | sed -e 's/\///'` - FUJITSU_REL=`echo ${UNAME_RELEASE} | sed -e 's/ /_/'` + FUJITSU_PROC=`uname -m | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz` + FUJITSU_SYS=`uname -p | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz | sed -e 's/\///'` + FUJITSU_REL=`echo "$UNAME_RELEASE" | sed -e 's/ /_/'` echo "${FUJITSU_PROC}-fujitsu-${FUJITSU_SYS}${FUJITSU_REL}" exit ;; 5000:UNIX_System_V:4.*:*) - FUJITSU_SYS=`uname -p | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz' | sed -e 's/\///'` - FUJITSU_REL=`echo ${UNAME_RELEASE} | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz' | sed -e 's/ /_/'` + FUJITSU_SYS=`uname -p | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz | sed -e 's/\///'` + FUJITSU_REL=`echo "$UNAME_RELEASE" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz | sed -e 's/ /_/'` echo "sparc-fujitsu-${FUJITSU_SYS}${FUJITSU_REL}" exit ;; i*86:BSD/386:*:* | i*86:BSD/OS:*:* | *:Ascend\ Embedded/OS:*:*) - echo ${UNAME_MACHINE}-pc-bsdi${UNAME_RELEASE} + echo "$UNAME_MACHINE"-pc-bsdi"$UNAME_RELEASE" exit ;; sparc*:BSD/OS:*:*) - echo sparc-unknown-bsdi${UNAME_RELEASE} + echo sparc-unknown-bsdi"$UNAME_RELEASE" exit ;; *:BSD/OS:*:*) - echo ${UNAME_MACHINE}-unknown-bsdi${UNAME_RELEASE} + echo "$UNAME_MACHINE"-unknown-bsdi"$UNAME_RELEASE" exit ;; *:FreeBSD:*:*) UNAME_PROCESSOR=`/usr/bin/uname -p` - case ${UNAME_PROCESSOR} in + case "$UNAME_PROCESSOR" in amd64) - echo x86_64-unknown-freebsd`echo ${UNAME_RELEASE}|sed -e 's/[-(].*//'` ;; - *) - echo ${UNAME_PROCESSOR}-unknown-freebsd`echo ${UNAME_RELEASE}|sed -e 's/[-(].*//'` ;; + UNAME_PROCESSOR=x86_64 ;; + i386) + UNAME_PROCESSOR=i586 ;; esac + echo "$UNAME_PROCESSOR"-unknown-freebsd"`echo "$UNAME_RELEASE"|sed -e 's/[-(].*//'`" exit ;; i*:CYGWIN*:*) - echo ${UNAME_MACHINE}-pc-cygwin + echo "$UNAME_MACHINE"-pc-cygwin + exit ;; + *:MINGW64*:*) + echo "$UNAME_MACHINE"-pc-mingw64 exit ;; *:MINGW*:*) - echo ${UNAME_MACHINE}-pc-mingw32 + echo "$UNAME_MACHINE"-pc-mingw32 exit ;; - i*:MSYS*:*) - echo ${UNAME_MACHINE}-pc-msys - exit ;; - i*:windows32*:*) - # uname -m includes "-pc" on this system. - echo ${UNAME_MACHINE}-mingw32 + *:MSYS*:*) + echo "$UNAME_MACHINE"-pc-msys exit ;; i*:PW*:*) - echo ${UNAME_MACHINE}-pc-pw32 + echo "$UNAME_MACHINE"-pc-pw32 exit ;; *:Interix*:*) - case ${UNAME_MACHINE} in + case "$UNAME_MACHINE" in x86) - echo i586-pc-interix${UNAME_RELEASE} + echo i586-pc-interix"$UNAME_RELEASE" exit ;; authenticamd | genuineintel | EM64T) - echo x86_64-unknown-interix${UNAME_RELEASE} + echo x86_64-unknown-interix"$UNAME_RELEASE" exit ;; IA64) - echo ia64-unknown-interix${UNAME_RELEASE} + echo ia64-unknown-interix"$UNAME_RELEASE" exit ;; esac ;; - [345]86:Windows_95:* | [345]86:Windows_98:* | [345]86:Windows_NT:*) - echo i${UNAME_MACHINE}-pc-mks - exit ;; - 8664:Windows_NT:*) - echo x86_64-pc-mks - exit ;; - i*:Windows_NT*:* | Pentium*:Windows_NT*:*) - # How do we know it's Interix rather than the generic POSIX subsystem? - # It also conflicts with pre-2.0 versions of AT&T UWIN. Should we - # UNAME_MACHINE based on the output of uname instead of i386? - echo i586-pc-interix - exit ;; i*:UWIN*:*) - echo ${UNAME_MACHINE}-pc-uwin + echo "$UNAME_MACHINE"-pc-uwin exit ;; amd64:CYGWIN*:*:* | x86_64:CYGWIN*:*:*) echo x86_64-unknown-cygwin exit ;; - p*:CYGWIN*:*) - echo powerpcle-unknown-cygwin - exit ;; prep*:SunOS:5.*:*) - echo powerpcle-unknown-solaris2`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'` + echo powerpcle-unknown-solaris2"`echo "$UNAME_RELEASE"|sed -e 's/[^.]*//'`" exit ;; *:GNU:*:*) # the GNU system - echo `echo ${UNAME_MACHINE}|sed -e 's,[-/].*$,,'`-unknown-gnu`echo ${UNAME_RELEASE}|sed -e 's,/.*$,,'` + echo "`echo "$UNAME_MACHINE"|sed -e 's,[-/].*$,,'`-unknown-$LIBC`echo "$UNAME_RELEASE"|sed -e 's,/.*$,,'`" exit ;; *:GNU/*:*:*) # other systems with GNU libc and userland - echo ${UNAME_MACHINE}-unknown-`echo ${UNAME_SYSTEM} | sed 's,^[^/]*/,,' | tr '[A-Z]' '[a-z]'``echo ${UNAME_RELEASE}|sed -e 's/[-(].*//'`-gnu + echo "$UNAME_MACHINE-unknown-`echo "$UNAME_SYSTEM" | sed 's,^[^/]*/,,' | tr "[:upper:]" "[:lower:]"``echo "$UNAME_RELEASE"|sed -e 's/[-(].*//'`-$LIBC" exit ;; i*86:Minix:*:*) - echo ${UNAME_MACHINE}-pc-minix + echo "$UNAME_MACHINE"-pc-minix + exit ;; + aarch64:Linux:*:*) + echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" + exit ;; + aarch64_be:Linux:*:*) + UNAME_MACHINE=aarch64_be + echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" exit ;; alpha:Linux:*:*) case `sed -n '/^cpu model/s/^.*: \(.*\)/\1/p' < /proc/cpuinfo` in @@ -874,63 +915,64 @@ EOF EV68*) UNAME_MACHINE=alphaev68 ;; esac objdump --private-headers /bin/sh | grep -q ld.so.1 - if test "$?" = 0 ; then LIBC="libc1" ; else LIBC="" ; fi - echo ${UNAME_MACHINE}-unknown-linux-gnu${LIBC} + if test "$?" = 0 ; then LIBC=gnulibc1 ; fi + echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" + exit ;; + arc:Linux:*:* | arceb:Linux:*:*) + echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" exit ;; arm*:Linux:*:*) - eval $set_cc_for_build + eval "$set_cc_for_build" if echo __ARM_EABI__ | $CC_FOR_BUILD -E - 2>/dev/null \ | grep -q __ARM_EABI__ then - echo ${UNAME_MACHINE}-unknown-linux-gnu + echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" else if echo __ARM_PCS_VFP | $CC_FOR_BUILD -E - 2>/dev/null \ | grep -q __ARM_PCS_VFP then - echo ${UNAME_MACHINE}-unknown-linux-gnueabi + echo "$UNAME_MACHINE"-unknown-linux-"$LIBC"eabi else - echo ${UNAME_MACHINE}-unknown-linux-gnueabihf + echo "$UNAME_MACHINE"-unknown-linux-"$LIBC"eabihf fi fi exit ;; avr32*:Linux:*:*) - echo ${UNAME_MACHINE}-unknown-linux-gnu + echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" exit ;; cris:Linux:*:*) - echo cris-axis-linux-gnu + echo "$UNAME_MACHINE"-axis-linux-"$LIBC" exit ;; crisv32:Linux:*:*) - echo crisv32-axis-linux-gnu + echo "$UNAME_MACHINE"-axis-linux-"$LIBC" + exit ;; + e2k:Linux:*:*) + echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" exit ;; frv:Linux:*:*) - echo frv-unknown-linux-gnu + echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" exit ;; hexagon:Linux:*:*) - echo hexagon-unknown-linux-gnu + echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" exit ;; i*86:Linux:*:*) - LIBC=gnu - eval $set_cc_for_build - sed 's/^ //' << EOF >$dummy.c - #ifdef __dietlibc__ - LIBC=dietlibc - #endif -EOF - eval `$CC_FOR_BUILD -E $dummy.c 2>/dev/null | grep '^LIBC'` - echo "${UNAME_MACHINE}-pc-linux-${LIBC}" + echo "$UNAME_MACHINE"-pc-linux-"$LIBC" exit ;; ia64:Linux:*:*) - echo ${UNAME_MACHINE}-unknown-linux-gnu + echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" + exit ;; + k1om:Linux:*:*) + echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" exit ;; m32r*:Linux:*:*) - echo ${UNAME_MACHINE}-unknown-linux-gnu + echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" exit ;; m68*:Linux:*:*) - echo ${UNAME_MACHINE}-unknown-linux-gnu + echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" exit ;; mips:Linux:*:* | mips64:Linux:*:*) - eval $set_cc_for_build - sed 's/^ //' << EOF >$dummy.c + eval "$set_cc_for_build" + sed 's/^ //' << EOF > "$dummy.c" #undef CPU #undef ${UNAME_MACHINE} #undef ${UNAME_MACHINE}el @@ -944,55 +986,70 @@ EOF #endif #endif EOF - eval `$CC_FOR_BUILD -E $dummy.c 2>/dev/null | grep '^CPU'` - test x"${CPU}" != x && { echo "${CPU}-unknown-linux-gnu"; exit; } + eval "`$CC_FOR_BUILD -E "$dummy.c" 2>/dev/null | grep '^CPU'`" + test "x$CPU" != x && { echo "$CPU-unknown-linux-$LIBC"; exit; } ;; - or32:Linux:*:*) - echo or32-unknown-linux-gnu + mips64el:Linux:*:*) + echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" + exit ;; + openrisc*:Linux:*:*) + echo or1k-unknown-linux-"$LIBC" + exit ;; + or32:Linux:*:* | or1k*:Linux:*:*) + echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" exit ;; padre:Linux:*:*) - echo sparc-unknown-linux-gnu + echo sparc-unknown-linux-"$LIBC" exit ;; parisc64:Linux:*:* | hppa64:Linux:*:*) - echo hppa64-unknown-linux-gnu + echo hppa64-unknown-linux-"$LIBC" exit ;; parisc:Linux:*:* | hppa:Linux:*:*) # Look for CPU level case `grep '^cpu[^a-z]*:' /proc/cpuinfo 2>/dev/null | cut -d' ' -f2` in - PA7*) echo hppa1.1-unknown-linux-gnu ;; - PA8*) echo hppa2.0-unknown-linux-gnu ;; - *) echo hppa-unknown-linux-gnu ;; + PA7*) echo hppa1.1-unknown-linux-"$LIBC" ;; + PA8*) echo hppa2.0-unknown-linux-"$LIBC" ;; + *) echo hppa-unknown-linux-"$LIBC" ;; esac exit ;; ppc64:Linux:*:*) - echo powerpc64-unknown-linux-gnu + echo powerpc64-unknown-linux-"$LIBC" exit ;; ppc:Linux:*:*) - echo powerpc-unknown-linux-gnu + echo powerpc-unknown-linux-"$LIBC" + exit ;; + ppc64le:Linux:*:*) + echo powerpc64le-unknown-linux-"$LIBC" + exit ;; + ppcle:Linux:*:*) + echo powerpcle-unknown-linux-"$LIBC" + exit ;; + riscv32:Linux:*:* | riscv64:Linux:*:*) + echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" exit ;; s390:Linux:*:* | s390x:Linux:*:*) - echo ${UNAME_MACHINE}-ibm-linux + echo "$UNAME_MACHINE"-ibm-linux-"$LIBC" exit ;; sh64*:Linux:*:*) - echo ${UNAME_MACHINE}-unknown-linux-gnu + echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" exit ;; sh*:Linux:*:*) - echo ${UNAME_MACHINE}-unknown-linux-gnu + echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" exit ;; sparc:Linux:*:* | sparc64:Linux:*:*) - echo ${UNAME_MACHINE}-unknown-linux-gnu + echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" exit ;; tile*:Linux:*:*) - echo ${UNAME_MACHINE}-unknown-linux-gnu + echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" exit ;; vax:Linux:*:*) - echo ${UNAME_MACHINE}-dec-linux-gnu + echo "$UNAME_MACHINE"-dec-linux-"$LIBC" exit ;; x86_64:Linux:*:*) - echo x86_64-unknown-linux-gnu + echo "$UNAME_MACHINE"-pc-linux-"$LIBC" exit ;; xtensa*:Linux:*:*) - echo ${UNAME_MACHINE}-unknown-linux-gnu + echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" exit ;; i*86:DYNIX/ptx:4*:*) # ptx 4.0 does uname -s correctly, with DYNIX/ptx in there. @@ -1006,34 +1063,34 @@ EOF # I am not positive that other SVR4 systems won't match this, # I just have to hope. -- rms. # Use sysv4.2uw... so that sysv4* matches it. - echo ${UNAME_MACHINE}-pc-sysv4.2uw${UNAME_VERSION} + echo "$UNAME_MACHINE"-pc-sysv4.2uw"$UNAME_VERSION" exit ;; i*86:OS/2:*:*) # If we were able to find `uname', then EMX Unix compatibility # is probably installed. - echo ${UNAME_MACHINE}-pc-os2-emx + echo "$UNAME_MACHINE"-pc-os2-emx exit ;; i*86:XTS-300:*:STOP) - echo ${UNAME_MACHINE}-unknown-stop + echo "$UNAME_MACHINE"-unknown-stop exit ;; i*86:atheos:*:*) - echo ${UNAME_MACHINE}-unknown-atheos + echo "$UNAME_MACHINE"-unknown-atheos exit ;; i*86:syllable:*:*) - echo ${UNAME_MACHINE}-pc-syllable + echo "$UNAME_MACHINE"-pc-syllable exit ;; i*86:LynxOS:2.*:* | i*86:LynxOS:3.[01]*:* | i*86:LynxOS:4.[02]*:*) - echo i386-unknown-lynxos${UNAME_RELEASE} + echo i386-unknown-lynxos"$UNAME_RELEASE" exit ;; i*86:*DOS:*:*) - echo ${UNAME_MACHINE}-pc-msdosdjgpp + echo "$UNAME_MACHINE"-pc-msdosdjgpp exit ;; - i*86:*:4.*:* | i*86:SYSTEM_V:4.*:*) - UNAME_REL=`echo ${UNAME_RELEASE} | sed 's/\/MP$//'` + i*86:*:4.*:*) + UNAME_REL=`echo "$UNAME_RELEASE" | sed 's/\/MP$//'` if grep Novell /usr/include/link.h >/dev/null 2>/dev/null; then - echo ${UNAME_MACHINE}-univel-sysv${UNAME_REL} + echo "$UNAME_MACHINE"-univel-sysv"$UNAME_REL" else - echo ${UNAME_MACHINE}-pc-sysv${UNAME_REL} + echo "$UNAME_MACHINE"-pc-sysv"$UNAME_REL" fi exit ;; i*86:*:5:[678]*) @@ -1043,12 +1100,12 @@ EOF *Pentium) UNAME_MACHINE=i586 ;; *Pent*|*Celeron) UNAME_MACHINE=i686 ;; esac - echo ${UNAME_MACHINE}-unknown-sysv${UNAME_RELEASE}${UNAME_SYSTEM}${UNAME_VERSION} + echo "$UNAME_MACHINE-unknown-sysv${UNAME_RELEASE}${UNAME_SYSTEM}{$UNAME_VERSION}" exit ;; i*86:*:3.2:*) if test -f /usr/options/cb.name; then UNAME_REL=`sed -n 's/.*Version //p' /dev/null >/dev/null ; then UNAME_REL=`(/bin/uname -X|grep Release|sed -e 's/.*= //')` (/bin/uname -X|grep i80486 >/dev/null) && UNAME_MACHINE=i486 @@ -1058,9 +1115,9 @@ EOF && UNAME_MACHINE=i686 (/bin/uname -X|grep '^Machine.*Pentium Pro' >/dev/null) \ && UNAME_MACHINE=i686 - echo ${UNAME_MACHINE}-pc-sco$UNAME_REL + echo "$UNAME_MACHINE"-pc-sco"$UNAME_REL" else - echo ${UNAME_MACHINE}-pc-sysv32 + echo "$UNAME_MACHINE"-pc-sysv32 fi exit ;; pc:*:*:*) @@ -1068,7 +1125,7 @@ EOF # uname -m prints for DJGPP always 'pc', but it prints nothing about # the processor, so we play safe by assuming i586. # Note: whatever this is, it MUST be the same as what config.sub - # prints for the "djgpp" host, or else GDB configury will decide that + # prints for the "djgpp" host, or else GDB configure will decide that # this is a cross-build. echo i586-pc-msdosdjgpp exit ;; @@ -1080,9 +1137,9 @@ EOF exit ;; i860:*:4.*:*) # i860-SVR4 if grep Stardent /usr/include/sys/uadmin.h >/dev/null 2>&1 ; then - echo i860-stardent-sysv${UNAME_RELEASE} # Stardent Vistra i860-SVR4 + echo i860-stardent-sysv"$UNAME_RELEASE" # Stardent Vistra i860-SVR4 else # Add other i860-SVR4 vendors below as they are discovered. - echo i860-unknown-sysv${UNAME_RELEASE} # Unknown i860-SVR4 + echo i860-unknown-sysv"$UNAME_RELEASE" # Unknown i860-SVR4 fi exit ;; mini*:CTIX:SYS*5:*) @@ -1102,9 +1159,9 @@ EOF test -r /etc/.relid \ && OS_REL=.`sed -n 's/[^ ]* [^ ]* \([0-9][0-9]\).*/\1/p' < /etc/.relid` /bin/uname -p 2>/dev/null | grep 86 >/dev/null \ - && { echo i486-ncr-sysv4.3${OS_REL}; exit; } + && { echo i486-ncr-sysv4.3"$OS_REL"; exit; } /bin/uname -p 2>/dev/null | /bin/grep entium >/dev/null \ - && { echo i586-ncr-sysv4.3${OS_REL}; exit; } ;; + && { echo i586-ncr-sysv4.3"$OS_REL"; exit; } ;; 3[34]??:*:4.0:* | 3[34]??,*:*:4.0:*) /bin/uname -p 2>/dev/null | grep 86 >/dev/null \ && { echo i486-ncr-sysv4; exit; } ;; @@ -1113,28 +1170,28 @@ EOF test -r /etc/.relid \ && OS_REL=.`sed -n 's/[^ ]* [^ ]* \([0-9][0-9]\).*/\1/p' < /etc/.relid` /bin/uname -p 2>/dev/null | grep 86 >/dev/null \ - && { echo i486-ncr-sysv4.3${OS_REL}; exit; } + && { echo i486-ncr-sysv4.3"$OS_REL"; exit; } /bin/uname -p 2>/dev/null | /bin/grep entium >/dev/null \ - && { echo i586-ncr-sysv4.3${OS_REL}; exit; } + && { echo i586-ncr-sysv4.3"$OS_REL"; exit; } /bin/uname -p 2>/dev/null | /bin/grep pteron >/dev/null \ - && { echo i586-ncr-sysv4.3${OS_REL}; exit; } ;; + && { echo i586-ncr-sysv4.3"$OS_REL"; exit; } ;; m68*:LynxOS:2.*:* | m68*:LynxOS:3.0*:*) - echo m68k-unknown-lynxos${UNAME_RELEASE} + echo m68k-unknown-lynxos"$UNAME_RELEASE" exit ;; mc68030:UNIX_System_V:4.*:*) echo m68k-atari-sysv4 exit ;; TSUNAMI:LynxOS:2.*:*) - echo sparc-unknown-lynxos${UNAME_RELEASE} + echo sparc-unknown-lynxos"$UNAME_RELEASE" exit ;; rs6000:LynxOS:2.*:*) - echo rs6000-unknown-lynxos${UNAME_RELEASE} + echo rs6000-unknown-lynxos"$UNAME_RELEASE" exit ;; PowerPC:LynxOS:2.*:* | PowerPC:LynxOS:3.[01]*:* | PowerPC:LynxOS:4.[02]*:*) - echo powerpc-unknown-lynxos${UNAME_RELEASE} + echo powerpc-unknown-lynxos"$UNAME_RELEASE" exit ;; SM[BE]S:UNIX_SV:*:*) - echo mips-dde-sysv${UNAME_RELEASE} + echo mips-dde-sysv"$UNAME_RELEASE" exit ;; RM*:ReliantUNIX-*:*:*) echo mips-sni-sysv4 @@ -1145,7 +1202,7 @@ EOF *:SINIX-*:*:*) if uname -p 2>/dev/null >/dev/null ; then UNAME_MACHINE=`(uname -p) 2>/dev/null` - echo ${UNAME_MACHINE}-sni-sysv4 + echo "$UNAME_MACHINE"-sni-sysv4 else echo ns32k-sni-sysv fi @@ -1165,23 +1222,23 @@ EOF exit ;; i*86:VOS:*:*) # From Paul.Green@stratus.com. - echo ${UNAME_MACHINE}-stratus-vos + echo "$UNAME_MACHINE"-stratus-vos exit ;; *:VOS:*:*) # From Paul.Green@stratus.com. echo hppa1.1-stratus-vos exit ;; mc68*:A/UX:*:*) - echo m68k-apple-aux${UNAME_RELEASE} + echo m68k-apple-aux"$UNAME_RELEASE" exit ;; news*:NEWS-OS:6*:*) echo mips-sony-newsos6 exit ;; R[34]000:*System_V*:*:* | R4000:UNIX_SYSV:*:* | R*000:UNIX_SV:*:*) if [ -d /usr/nec ]; then - echo mips-nec-sysv${UNAME_RELEASE} + echo mips-nec-sysv"$UNAME_RELEASE" else - echo mips-unknown-sysv${UNAME_RELEASE} + echo mips-unknown-sysv"$UNAME_RELEASE" fi exit ;; BeBox:BeOS:*:*) # BeOS running on hardware made by Be, PPC only. @@ -1196,66 +1253,97 @@ EOF BePC:Haiku:*:*) # Haiku running on Intel PC compatible. echo i586-pc-haiku exit ;; + x86_64:Haiku:*:*) + echo x86_64-unknown-haiku + exit ;; SX-4:SUPER-UX:*:*) - echo sx4-nec-superux${UNAME_RELEASE} + echo sx4-nec-superux"$UNAME_RELEASE" exit ;; SX-5:SUPER-UX:*:*) - echo sx5-nec-superux${UNAME_RELEASE} + echo sx5-nec-superux"$UNAME_RELEASE" exit ;; SX-6:SUPER-UX:*:*) - echo sx6-nec-superux${UNAME_RELEASE} + echo sx6-nec-superux"$UNAME_RELEASE" exit ;; SX-7:SUPER-UX:*:*) - echo sx7-nec-superux${UNAME_RELEASE} + echo sx7-nec-superux"$UNAME_RELEASE" exit ;; SX-8:SUPER-UX:*:*) - echo sx8-nec-superux${UNAME_RELEASE} + echo sx8-nec-superux"$UNAME_RELEASE" exit ;; SX-8R:SUPER-UX:*:*) - echo sx8r-nec-superux${UNAME_RELEASE} + echo sx8r-nec-superux"$UNAME_RELEASE" + exit ;; + SX-ACE:SUPER-UX:*:*) + echo sxace-nec-superux"$UNAME_RELEASE" exit ;; Power*:Rhapsody:*:*) - echo powerpc-apple-rhapsody${UNAME_RELEASE} + echo powerpc-apple-rhapsody"$UNAME_RELEASE" exit ;; *:Rhapsody:*:*) - echo ${UNAME_MACHINE}-apple-rhapsody${UNAME_RELEASE} + echo "$UNAME_MACHINE"-apple-rhapsody"$UNAME_RELEASE" exit ;; *:Darwin:*:*) UNAME_PROCESSOR=`uname -p` || UNAME_PROCESSOR=unknown - case $UNAME_PROCESSOR in - i386) - eval $set_cc_for_build - if [ "$CC_FOR_BUILD" != 'no_compiler_found' ]; then - if (echo '#ifdef __LP64__'; echo IS_64BIT_ARCH; echo '#endif') | \ - (CCOPTS= $CC_FOR_BUILD -E - 2>/dev/null) | \ - grep IS_64BIT_ARCH >/dev/null - then - UNAME_PROCESSOR="x86_64" - fi - fi ;; - unknown) UNAME_PROCESSOR=powerpc ;; - esac - echo ${UNAME_PROCESSOR}-apple-darwin${UNAME_RELEASE} + eval "$set_cc_for_build" + if test "$UNAME_PROCESSOR" = unknown ; then + UNAME_PROCESSOR=powerpc + fi + if test "`echo "$UNAME_RELEASE" | sed -e 's/\..*//'`" -le 10 ; then + if [ "$CC_FOR_BUILD" != no_compiler_found ]; then + if (echo '#ifdef __LP64__'; echo IS_64BIT_ARCH; echo '#endif') | \ + (CCOPTS="" $CC_FOR_BUILD -E - 2>/dev/null) | \ + grep IS_64BIT_ARCH >/dev/null + then + case $UNAME_PROCESSOR in + i386) UNAME_PROCESSOR=x86_64 ;; + powerpc) UNAME_PROCESSOR=powerpc64 ;; + esac + fi + # On 10.4-10.6 one might compile for PowerPC via gcc -arch ppc + if (echo '#ifdef __POWERPC__'; echo IS_PPC; echo '#endif') | \ + (CCOPTS="" $CC_FOR_BUILD -E - 2>/dev/null) | \ + grep IS_PPC >/dev/null + then + UNAME_PROCESSOR=powerpc + fi + fi + elif test "$UNAME_PROCESSOR" = i386 ; then + # Avoid executing cc on OS X 10.9, as it ships with a stub + # that puts up a graphical alert prompting to install + # developer tools. Any system running Mac OS X 10.7 or + # later (Darwin 11 and later) is required to have a 64-bit + # processor. This is not true of the ARM version of Darwin + # that Apple uses in portable devices. + UNAME_PROCESSOR=x86_64 + fi + echo "$UNAME_PROCESSOR"-apple-darwin"$UNAME_RELEASE" exit ;; *:procnto*:*:* | *:QNX:[0123456789]*:*) UNAME_PROCESSOR=`uname -p` - if test "$UNAME_PROCESSOR" = "x86"; then + if test "$UNAME_PROCESSOR" = x86; then UNAME_PROCESSOR=i386 UNAME_MACHINE=pc fi - echo ${UNAME_PROCESSOR}-${UNAME_MACHINE}-nto-qnx${UNAME_RELEASE} + echo "$UNAME_PROCESSOR"-"$UNAME_MACHINE"-nto-qnx"$UNAME_RELEASE" exit ;; *:QNX:*:4*) echo i386-pc-qnx exit ;; - NEO-?:NONSTOP_KERNEL:*:*) - echo neo-tandem-nsk${UNAME_RELEASE} + NEO-*:NONSTOP_KERNEL:*:*) + echo neo-tandem-nsk"$UNAME_RELEASE" exit ;; - NSE-?:NONSTOP_KERNEL:*:*) - echo nse-tandem-nsk${UNAME_RELEASE} + NSE-*:NONSTOP_KERNEL:*:*) + echo nse-tandem-nsk"$UNAME_RELEASE" exit ;; - NSR-?:NONSTOP_KERNEL:*:*) - echo nsr-tandem-nsk${UNAME_RELEASE} + NSR-*:NONSTOP_KERNEL:*:*) + echo nsr-tandem-nsk"$UNAME_RELEASE" + exit ;; + NSV-*:NONSTOP_KERNEL:*:*) + echo nsv-tandem-nsk"$UNAME_RELEASE" + exit ;; + NSX-*:NONSTOP_KERNEL:*:*) + echo nsx-tandem-nsk"$UNAME_RELEASE" exit ;; *:NonStop-UX:*:*) echo mips-compaq-nonstopux @@ -1264,18 +1352,18 @@ EOF echo bs2000-siemens-sysv exit ;; DS/*:UNIX_System_V:*:*) - echo ${UNAME_MACHINE}-${UNAME_SYSTEM}-${UNAME_RELEASE} + echo "$UNAME_MACHINE"-"$UNAME_SYSTEM"-"$UNAME_RELEASE" exit ;; *:Plan9:*:*) # "uname -m" is not consistent, so use $cputype instead. 386 # is converted to i386 for consistency with other x86 # operating systems. - if test "$cputype" = "386"; then + if test "$cputype" = 386; then UNAME_MACHINE=i386 else UNAME_MACHINE="$cputype" fi - echo ${UNAME_MACHINE}-unknown-plan9 + echo "$UNAME_MACHINE"-unknown-plan9 exit ;; *:TOPS-10:*:*) echo pdp10-unknown-tops10 @@ -1296,14 +1384,14 @@ EOF echo pdp10-unknown-its exit ;; SEI:*:*:SEIUX) - echo mips-sei-seiux${UNAME_RELEASE} + echo mips-sei-seiux"$UNAME_RELEASE" exit ;; *:DragonFly:*:*) - echo ${UNAME_MACHINE}-unknown-dragonfly`echo ${UNAME_RELEASE}|sed -e 's/[-(].*//'` + echo "$UNAME_MACHINE"-unknown-dragonfly"`echo "$UNAME_RELEASE"|sed -e 's/[-(].*//'`" exit ;; *:*VMS:*:*) UNAME_MACHINE=`(uname -p) 2>/dev/null` - case "${UNAME_MACHINE}" in + case "$UNAME_MACHINE" in A*) echo alpha-dec-vms ; exit ;; I*) echo ia64-dec-vms ; exit ;; V*) echo vax-dec-vms ; exit ;; @@ -1312,182 +1400,48 @@ EOF echo i386-pc-xenix exit ;; i*86:skyos:*:*) - echo ${UNAME_MACHINE}-pc-skyos`echo ${UNAME_RELEASE}` | sed -e 's/ .*$//' + echo "$UNAME_MACHINE"-pc-skyos"`echo "$UNAME_RELEASE" | sed -e 's/ .*$//'`" exit ;; i*86:rdos:*:*) - echo ${UNAME_MACHINE}-pc-rdos + echo "$UNAME_MACHINE"-pc-rdos exit ;; i*86:AROS:*:*) - echo ${UNAME_MACHINE}-pc-aros + echo "$UNAME_MACHINE"-pc-aros + exit ;; + x86_64:VMkernel:*:*) + echo "$UNAME_MACHINE"-unknown-esx + exit ;; + amd64:Isilon\ OneFS:*:*) + echo x86_64-unknown-onefs exit ;; esac -#echo '(No uname command or uname output not recognized.)' 1>&2 -#echo "${UNAME_MACHINE}:${UNAME_SYSTEM}:${UNAME_RELEASE}:${UNAME_VERSION}" 1>&2 +echo "$0: unable to guess system type" >&2 -eval $set_cc_for_build -cat >$dummy.c < -# include -#endif -main () -{ -#if defined (sony) -#if defined (MIPSEB) - /* BFD wants "bsd" instead of "newsos". Perhaps BFD should be changed, - I don't know.... */ - printf ("mips-sony-bsd\n"); exit (0); -#else -#include - printf ("m68k-sony-newsos%s\n", -#ifdef NEWSOS4 - "4" -#else - "" -#endif - ); exit (0); -#endif -#endif +case "$UNAME_MACHINE:$UNAME_SYSTEM" in + mips:Linux | mips64:Linux) + # If we got here on MIPS GNU/Linux, output extra information. + cat >&2 </dev/null`; - if (version < 4) - printf ("%s-next-nextstep%d\n", __ARCHITECTURE__, version); - else - printf ("%s-next-openstep%d\n", __ARCHITECTURE__, version); - exit (0); -#endif - -#if defined (MULTIMAX) || defined (n16) -#if defined (UMAXV) - printf ("ns32k-encore-sysv\n"); exit (0); -#else -#if defined (CMU) - printf ("ns32k-encore-mach\n"); exit (0); -#else - printf ("ns32k-encore-bsd\n"); exit (0); -#endif -#endif -#endif - -#if defined (__386BSD__) - printf ("i386-pc-bsd\n"); exit (0); -#endif - -#if defined (sequent) -#if defined (i386) - printf ("i386-sequent-dynix\n"); exit (0); -#endif -#if defined (ns32000) - printf ("ns32k-sequent-dynix\n"); exit (0); -#endif -#endif - -#if defined (_SEQUENT_) - struct utsname un; - - uname(&un); - - if (strncmp(un.version, "V2", 2) == 0) { - printf ("i386-sequent-ptx2\n"); exit (0); - } - if (strncmp(un.version, "V1", 2) == 0) { /* XXX is V1 correct? */ - printf ("i386-sequent-ptx1\n"); exit (0); - } - printf ("i386-sequent-ptx\n"); exit (0); - -#endif - -#if defined (vax) -# if !defined (ultrix) -# include -# if defined (BSD) -# if BSD == 43 - printf ("vax-dec-bsd4.3\n"); exit (0); -# else -# if BSD == 199006 - printf ("vax-dec-bsd4.3reno\n"); exit (0); -# else - printf ("vax-dec-bsd\n"); exit (0); -# endif -# endif -# else - printf ("vax-dec-bsd\n"); exit (0); -# endif -# else - printf ("vax-dec-ultrix\n"); exit (0); -# endif -#endif - -#if defined (alliant) && defined (i860) - printf ("i860-alliant-bsd\n"); exit (0); -#endif - - exit (1); -} +NOTE: MIPS GNU/Linux systems require a C compiler to fully recognize +the system type. Please install a C compiler and try again. EOF - -$CC_FOR_BUILD -o $dummy $dummy.c 2>/dev/null && SYSTEM_NAME=`$dummy` && - { echo "$SYSTEM_NAME"; exit; } - -# Apollos put the system type in the environment. - -test -d /usr/apollo && { echo ${ISP}-apollo-${SYSTYPE}; exit; } - -# Convex versions that predate uname can use getsysinfo(1) - -if [ -x /usr/convex/getsysinfo ] -then - case `getsysinfo -f cpu_type` in - c1*) - echo c1-convex-bsd - exit ;; - c2*) - if getsysinfo -f scalar_acc - then echo c32-convex-bsd - else echo c2-convex-bsd - fi - exit ;; - c34*) - echo c34-convex-bsd - exit ;; - c38*) - echo c38-convex-bsd - exit ;; - c4*) - echo c4-convex-bsd - exit ;; - esac -fi + ;; +esac cat >&2 < in order to provide the needed -information to handle your system. +If $0 has already been updated, send the following data and any +information you think might be pertinent to config-patches@gnu.org to +provide the necessary information to handle your system. config.guess timestamp = $timestamp @@ -1506,16 +1460,16 @@ hostinfo = `(hostinfo) 2>/dev/null` /usr/bin/oslevel = `(/usr/bin/oslevel) 2>/dev/null` /usr/convex/getsysinfo = `(/usr/convex/getsysinfo) 2>/dev/null` -UNAME_MACHINE = ${UNAME_MACHINE} -UNAME_RELEASE = ${UNAME_RELEASE} -UNAME_SYSTEM = ${UNAME_SYSTEM} -UNAME_VERSION = ${UNAME_VERSION} +UNAME_MACHINE = "$UNAME_MACHINE" +UNAME_RELEASE = "$UNAME_RELEASE" +UNAME_SYSTEM = "$UNAME_SYSTEM" +UNAME_VERSION = "$UNAME_VERSION" EOF exit 1 # Local variables: -# eval: (add-hook 'write-file-hooks 'time-stamp) +# eval: (add-hook 'before-save-hook 'time-stamp) # time-stamp-start: "timestamp='" # time-stamp-format: "%:y-%02m-%02d" # time-stamp-end: "'" diff --git a/extern/libpng/include/config.h.in b/extern/libpng/config.h.in similarity index 76% rename from extern/libpng/include/config.h.in rename to extern/libpng/config.h.in index d154742738..2931048bf4 100644 --- a/extern/libpng/include/config.h.in +++ b/extern/libpng/config.h.in @@ -15,15 +15,9 @@ /* Define to 1 if you have the `z' library (-lz). */ #undef HAVE_LIBZ -/* Define to 1 if you have the header file. */ -#undef HAVE_MALLOC_H - /* Define to 1 if you have the header file. */ #undef HAVE_MEMORY_H -/* Define to 1 if you have the `memset' function. */ -#undef HAVE_MEMSET - /* Define to 1 if you have the `pow' function. */ #undef HAVE_POW @@ -48,8 +42,7 @@ /* Define to 1 if you have the header file. */ #undef HAVE_UNISTD_H -/* Define to the sub-directory in which libtool stores uninstalled libraries. - */ +/* Define to the sub-directory where libtool stores uninstalled libraries. */ #undef LT_OBJDIR /* Name of package */ @@ -73,11 +66,35 @@ /* Define to the version of this package. */ #undef PACKAGE_VERSION -/* Align row buffers */ -#undef PNG_ALIGNED_MEMORY_SUPPORTED +/* Turn on ARM Neon optimizations at run-time */ +#undef PNG_ARM_NEON_API_SUPPORTED -/* Enable ARM NEON optimizations */ -#undef PNG_ARM_NEON +/* Check for ARM Neon support at run-time */ +#undef PNG_ARM_NEON_CHECK_SUPPORTED + +/* Enable ARM Neon optimizations */ +#undef PNG_ARM_NEON_OPT + +/* Enable Intel SSE optimizations */ +#undef PNG_INTEL_SSE_OPT + +/* Turn on MIPS MSA optimizations at run-time */ +#undef PNG_MIPS_MSA_API_SUPPORTED + +/* Check for MIPS MSA support at run-time */ +#undef PNG_MIPS_MSA_CHECK_SUPPORTED + +/* Enable MIPS MSA optimizations */ +#undef PNG_MIPS_MSA_OPT + +/* Turn on POWERPC VSX optimizations at run-time */ +#undef PNG_POWERPC_VSX_API_SUPPORTED + +/* Check for POWERPC VSX support at run-time */ +#undef PNG_POWERPC_VSX_CHECK_SUPPORTED + +/* Enable POWERPC VSX optimizations */ +#undef PNG_POWERPC_VSX_OPT /* Define to 1 if you have the ANSI C header files. */ #undef STDC_HEADERS diff --git a/extern/libpng/include/config.sub b/extern/libpng/config.sub old mode 100644 new mode 100755 similarity index 77% rename from extern/libpng/include/config.sub rename to extern/libpng/config.sub index e76eaf472a..9ccf09a7a3 --- a/extern/libpng/include/config.sub +++ b/extern/libpng/config.sub @@ -1,38 +1,31 @@ #! /bin/sh # Configuration validation subroutine script. -# Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, -# 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, -# 2011 Free Software Foundation, Inc. +# Copyright 1992-2018 Free Software Foundation, Inc. -timestamp='2011-11-11' +timestamp='2018-03-08' -# This file is (in principle) common to ALL GNU software. -# The presence of a machine in this file suggests that SOME GNU software -# can handle that machine. It does not imply ALL GNU software can. -# -# This file is free software; you can redistribute it and/or modify -# it under the terms of the GNU General Public License as published by -# the Free Software Foundation; either version 2 of the License, or +# This file is free software; you can redistribute it and/or modify it +# under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3 of the License, or # (at your option) any later version. # -# This program is distributed in the hope that it will be useful, -# but WITHOUT ANY WARRANTY; without even the implied warranty of -# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -# GNU General Public License for more details. +# This program is distributed in the hope that it will be useful, but +# WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +# General Public License for more details. # # You should have received a copy of the GNU General Public License -# along with this program; if not, write to the Free Software -# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA -# 02110-1301, USA. +# along with this program; if not, see . # # As a special exception to the GNU General Public License, if you # distribute this file as part of a program that contains a # configuration script generated by Autoconf, you may include it under -# the same distribution terms that you use for the rest of that program. +# the same distribution terms that you use for the rest of that +# program. This Exception is an additional permission under section 7 +# of the GNU General Public License, version 3 ("GPLv3"). -# Please send patches to . Submit a context -# diff and a properly formatted GNU ChangeLog entry. +# Please send patches to . # # Configuration subroutine to validate and canonicalize a configuration type. # Supply the specified configuration type as an argument. @@ -40,7 +33,7 @@ timestamp='2011-11-11' # Otherwise, we print the canonical config type on stdout and succeed. # You can get the latest version of this script from: -# http://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.sub;hb=HEAD +# https://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.sub # This file is supposed to be the same for all GNU packages # and recognize all the CPU types, system types and aliases @@ -60,12 +53,11 @@ timestamp='2011-11-11' me=`echo "$0" | sed -e 's,.*/,,'` usage="\ -Usage: $0 [OPTION] CPU-MFR-OPSYS - $0 [OPTION] ALIAS +Usage: $0 [OPTION] CPU-MFR-OPSYS or ALIAS Canonicalize a configuration name. -Operation modes: +Options: -h, --help print this help, then exit -t, --time-stamp print date of last modification, then exit -v, --version print version number, then exit @@ -75,9 +67,7 @@ Report bugs and patches to ." version="\ GNU config.sub ($timestamp) -Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, -2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free -Software Foundation, Inc. +Copyright 1992-2018 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE." @@ -104,7 +94,7 @@ while test $# -gt 0 ; do *local*) # First pass through any local machine types. - echo $1 + echo "$1" exit ;; * ) @@ -122,20 +112,24 @@ esac # Separate what the user gave into CPU-COMPANY and OS or KERNEL-OS (if any). # Here we must recognize all the valid KERNEL-OS combinations. -maybe_os=`echo $1 | sed 's/^\(.*\)-\([^-]*-[^-]*\)$/\2/'` +maybe_os=`echo "$1" | sed 's/^\(.*\)-\([^-]*-[^-]*\)$/\2/'` case $maybe_os in nto-qnx* | linux-gnu* | linux-android* | linux-dietlibc | linux-newlib* | \ - linux-uclibc* | uclinux-uclibc* | uclinux-gnu* | kfreebsd*-gnu* | \ - knetbsd*-gnu* | netbsd*-gnu* | \ - kopensolaris*-gnu* | \ + linux-musl* | linux-uclibc* | uclinux-uclibc* | uclinux-gnu* | kfreebsd*-gnu* | \ + knetbsd*-gnu* | netbsd*-gnu* | netbsd*-eabi* | \ + kopensolaris*-gnu* | cloudabi*-eabi* | \ storm-chaos* | os2-emx* | rtmk-nova*) os=-$maybe_os - basic_machine=`echo $1 | sed 's/^\(.*\)-\([^-]*-[^-]*\)$/\1/'` + basic_machine=`echo "$1" | sed 's/^\(.*\)-\([^-]*-[^-]*\)$/\1/'` + ;; + android-linux) + os=-linux-android + basic_machine=`echo "$1" | sed 's/^\(.*\)-\([^-]*-[^-]*\)$/\1/'`-unknown ;; *) - basic_machine=`echo $1 | sed 's/-[^-]*$//'` - if [ $basic_machine != $1 ] - then os=`echo $1 | sed 's/.*-/-/'` + basic_machine=`echo "$1" | sed 's/-[^-]*$//'` + if [ "$basic_machine" != "$1" ] + then os=`echo "$1" | sed 's/.*-/-/'` else os=; fi ;; esac @@ -154,7 +148,7 @@ case $os in -convergent* | -ncr* | -news | -32* | -3600* | -3100* | -hitachi* |\ -c[123]* | -convex* | -sun | -crds | -omron* | -dg | -ultra | -tti* | \ -harris | -dolphin | -highlevel | -gould | -cbm | -ns | -masscomp | \ - -apple | -axis | -knuth | -cray | -microblaze) + -apple | -axis | -knuth | -cray | -microblaze*) os= basic_machine=$1 ;; @@ -184,53 +178,56 @@ case $os in ;; -sco6) os=-sco5v6 - basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'` + basic_machine=`echo "$1" | sed -e 's/86-.*/86-pc/'` ;; -sco5) os=-sco3.2v5 - basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'` + basic_machine=`echo "$1" | sed -e 's/86-.*/86-pc/'` ;; -sco4) os=-sco3.2v4 - basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'` + basic_machine=`echo "$1" | sed -e 's/86-.*/86-pc/'` ;; -sco3.2.[4-9]*) os=`echo $os | sed -e 's/sco3.2./sco3.2v/'` - basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'` + basic_machine=`echo "$1" | sed -e 's/86-.*/86-pc/'` ;; -sco3.2v[4-9]*) # Don't forget version if it is 3.2v4 or newer. - basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'` + basic_machine=`echo "$1" | sed -e 's/86-.*/86-pc/'` ;; -sco5v6*) # Don't forget version if it is 3.2v4 or newer. - basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'` + basic_machine=`echo "$1" | sed -e 's/86-.*/86-pc/'` ;; -sco*) os=-sco3.2v2 - basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'` + basic_machine=`echo "$1" | sed -e 's/86-.*/86-pc/'` ;; -udk*) - basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'` + basic_machine=`echo "$1" | sed -e 's/86-.*/86-pc/'` ;; -isc) os=-isc2.2 - basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'` + basic_machine=`echo "$1" | sed -e 's/86-.*/86-pc/'` ;; -clix*) basic_machine=clipper-intergraph ;; -isc*) - basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'` + basic_machine=`echo "$1" | sed -e 's/86-.*/86-pc/'` + ;; + -lynx*178) + os=-lynxos178 + ;; + -lynx*5) + os=-lynxos5 ;; -lynx*) os=-lynxos ;; -ptx*) - basic_machine=`echo $1 | sed -e 's/86-.*/86-sequent/'` - ;; - -windowsnt*) - os=`echo $os | sed -e 's/windowsnt/winnt/'` + basic_machine=`echo "$1" | sed -e 's/86-.*/86-sequent/'` ;; -psos*) os=-psos @@ -247,24 +244,29 @@ case $basic_machine in # Some are omitted here because they have special meanings below. 1750a | 580 \ | a29k \ + | aarch64 | aarch64_be \ | alpha | alphaev[4-8] | alphaev56 | alphaev6[78] | alphapca5[67] \ | alpha64 | alpha64ev[4-8] | alpha64ev56 | alpha64ev6[78] | alpha64pca5[67] \ | am33_2.0 \ - | arc | arm | arm[bl]e | arme[lb] | armv[2345] | armv[345][lb] | avr | avr32 \ - | be32 | be64 \ + | arc | arceb \ + | arm | arm[bl]e | arme[lb] | armv[2-8] | armv[3-8][lb] | armv7[arm] \ + | avr | avr32 \ + | ba \ + | be32 | be64 \ | bfin \ - | c4x | clipper \ + | c4x | c8051 | clipper \ | d10v | d30v | dlx | dsp16xx \ - | epiphany \ - | fido | fr30 | frv \ + | e2k | epiphany \ + | fido | fr30 | frv | ft32 \ | h8300 | h8500 | hppa | hppa1.[01] | hppa2.0 | hppa2.0[nw] | hppa64 \ | hexagon \ - | i370 | i860 | i960 | ia64 \ + | i370 | i860 | i960 | ia16 | ia64 \ | ip2k | iq2000 \ + | k1om \ | le32 | le64 \ | lm32 \ | m32c | m32r | m32rle | m68000 | m68k | m88k \ - | maxq | mb | microblaze | mcore | mep | metag \ + | maxq | mb | microblaze | microblazeel | mcore | mep | metag \ | mips | mipsbe | mipseb | mipsel | mipsle \ | mips16 \ | mips64 | mips64el \ @@ -278,26 +280,30 @@ case $basic_machine in | mips64vr5900 | mips64vr5900el \ | mipsisa32 | mipsisa32el \ | mipsisa32r2 | mipsisa32r2el \ + | mipsisa32r6 | mipsisa32r6el \ | mipsisa64 | mipsisa64el \ | mipsisa64r2 | mipsisa64r2el \ + | mipsisa64r6 | mipsisa64r6el \ | mipsisa64sb1 | mipsisa64sb1el \ | mipsisa64sr71k | mipsisa64sr71kel \ + | mipsr5900 | mipsr5900el \ | mipstx39 | mipstx39el \ | mn10200 | mn10300 \ | moxie \ | mt \ | msp430 \ | nds32 | nds32le | nds32be \ - | nios | nios2 \ + | nios | nios2 | nios2eb | nios2el \ | ns16k | ns32k \ - | open8 \ - | or32 \ - | pdp10 | pdp11 | pj | pjl \ + | open8 | or1k | or1knd | or32 \ + | pdp10 | pj | pjl \ | powerpc | powerpc64 | powerpc64le | powerpcle \ + | pru \ | pyramid \ + | riscv32 | riscv64 \ | rl78 | rx \ | score \ - | sh | sh[1234] | sh[24]a | sh[24]aeb | sh[23]e | sh[34]eb | sheb | shbe | shle | sh[1234]le | sh3ele \ + | sh | sh[1234] | sh[24]a | sh[24]aeb | sh[23]e | sh[234]eb | sheb | shbe | shle | sh[1234]le | sh3ele \ | sh64 | sh64le \ | sparc | sparc64 | sparc64b | sparc64v | sparc86x | sparclet | sparclite \ | sparcv8 | sparcv9 | sparcv9b | sparcv9v \ @@ -305,7 +311,8 @@ case $basic_machine in | tahoe | tic4x | tic54x | tic55x | tic6x | tic80 | tron \ | ubicom32 \ | v850 | v850e | v850e1 | v850e2 | v850es | v850e2v3 \ - | we32k \ + | visium \ + | wasm32 \ | x86 | xc16x | xstormy16 | xtensa \ | z8k | z80) basic_machine=$basic_machine-unknown @@ -319,12 +326,14 @@ case $basic_machine in c6x) basic_machine=tic6x-unknown ;; - m6811 | m68hc11 | m6812 | m68hc12 | picochip) - # Motorola 68HC11/12. + leon|leon[3-9]) + basic_machine=sparc-$basic_machine + ;; + m6811 | m68hc11 | m6812 | m68hc12 | m68hcs12x | nvptx | picochip) basic_machine=$basic_machine-unknown os=-none ;; - m88110 | m680[12346]0 | m683?2 | m68360 | m5200 | v70 | w65 | z8k) + m88110 | m680[12346]0 | m683?2 | m68360 | m5200 | v70 | w65) ;; ms1) basic_machine=mt-unknown @@ -333,7 +342,10 @@ case $basic_machine in strongarm | thumb | xscale) basic_machine=arm-unknown ;; - + xgate) + basic_machine=$basic_machine-unknown + os=-none + ;; xscaleeb) basic_machine=armeb-unknown ;; @@ -350,34 +362,38 @@ case $basic_machine in ;; # Object if more than one company name word. *-*-*) - echo Invalid configuration \`$1\': machine \`$basic_machine\' not recognized 1>&2 + echo Invalid configuration \`"$1"\': machine \`"$basic_machine"\' not recognized 1>&2 exit 1 ;; # Recognize the basic CPU types with company name. 580-* \ | a29k-* \ + | aarch64-* | aarch64_be-* \ | alpha-* | alphaev[4-8]-* | alphaev56-* | alphaev6[78]-* \ | alpha64-* | alpha64ev[4-8]-* | alpha64ev56-* | alpha64ev6[78]-* \ - | alphapca5[67]-* | alpha64pca5[67]-* | arc-* \ + | alphapca5[67]-* | alpha64pca5[67]-* | arc-* | arceb-* \ | arm-* | armbe-* | armle-* | armeb-* | armv*-* \ | avr-* | avr32-* \ + | ba-* \ | be32-* | be64-* \ | bfin-* | bs2000-* \ | c[123]* | c30-* | [cjt]90-* | c4x-* \ - | clipper-* | craynv-* | cydra-* \ + | c8051-* | clipper-* | craynv-* | cydra-* \ | d10v-* | d30v-* | dlx-* \ - | elxsi-* \ + | e2k-* | elxsi-* \ | f30[01]-* | f700-* | fido-* | fr30-* | frv-* | fx80-* \ | h8300-* | h8500-* \ | hppa-* | hppa1.[01]-* | hppa2.0-* | hppa2.0[nw]-* | hppa64-* \ | hexagon-* \ - | i*86-* | i860-* | i960-* | ia64-* \ + | i*86-* | i860-* | i960-* | ia16-* | ia64-* \ | ip2k-* | iq2000-* \ + | k1om-* \ | le32-* | le64-* \ | lm32-* \ | m32c-* | m32r-* | m32rle-* \ | m68000-* | m680[012346]0-* | m68360-* | m683?2-* | m68k-* \ - | m88110-* | m88k-* | maxq-* | mcore-* | metag-* | microblaze-* \ + | m88110-* | m88k-* | maxq-* | mcore-* | metag-* \ + | microblaze-* | microblazeel-* \ | mips-* | mipsbe-* | mipseb-* | mipsel-* | mipsle-* \ | mips16-* \ | mips64-* | mips64el-* \ @@ -391,28 +407,34 @@ case $basic_machine in | mips64vr5900-* | mips64vr5900el-* \ | mipsisa32-* | mipsisa32el-* \ | mipsisa32r2-* | mipsisa32r2el-* \ + | mipsisa32r6-* | mipsisa32r6el-* \ | mipsisa64-* | mipsisa64el-* \ | mipsisa64r2-* | mipsisa64r2el-* \ + | mipsisa64r6-* | mipsisa64r6el-* \ | mipsisa64sb1-* | mipsisa64sb1el-* \ | mipsisa64sr71k-* | mipsisa64sr71kel-* \ + | mipsr5900-* | mipsr5900el-* \ | mipstx39-* | mipstx39el-* \ | mmix-* \ | mt-* \ | msp430-* \ | nds32-* | nds32le-* | nds32be-* \ - | nios-* | nios2-* \ + | nios-* | nios2-* | nios2eb-* | nios2el-* \ | none-* | np1-* | ns16k-* | ns32k-* \ | open8-* \ + | or1k*-* \ | orion-* \ | pdp10-* | pdp11-* | pj-* | pjl-* | pn-* | power-* \ | powerpc-* | powerpc64-* | powerpc64le-* | powerpcle-* \ + | pru-* \ | pyramid-* \ + | riscv32-* | riscv64-* \ | rl78-* | romp-* | rs6000-* | rx-* \ | sh-* | sh[1234]-* | sh[24]a-* | sh[24]aeb-* | sh[23]e-* | sh[34]eb-* | sheb-* | shbe-* \ | shle-* | sh[1234]le-* | sh3ele-* | sh64-* | sh64le-* \ | sparc-* | sparc64-* | sparc64b-* | sparc64v-* | sparc86x-* | sparclet-* \ | sparclite-* \ - | sparcv8-* | sparcv9-* | sparcv9b-* | sparcv9v-* | sv1-* | sx?-* \ + | sparcv8-* | sparcv9-* | sparcv9b-* | sparcv9v-* | sv1-* | sx*-* \ | tahoe-* \ | tic30-* | tic4x-* | tic54x-* | tic55x-* | tic6x-* | tic80-* \ | tile*-* \ @@ -420,6 +442,8 @@ case $basic_machine in | ubicom32-* \ | v850-* | v850e-* | v850e1-* | v850es-* | v850e2-* | v850e2v3-* \ | vax-* \ + | visium-* \ + | wasm32-* \ | we32k-* \ | x86-* | x86_64-* | xc16x-* | xps100-* \ | xstormy16-* | xtensa*-* \ @@ -433,7 +457,7 @@ case $basic_machine in # Recognize the various machine names and aliases which stand # for a CPU type and a company and sometimes even an OS. 386bsd) - basic_machine=i386-unknown + basic_machine=i386-pc os=-bsd ;; 3b1 | 7300 | 7300-att | att-7300 | pc7300 | safari | unixpc) @@ -467,7 +491,7 @@ case $basic_machine in basic_machine=x86_64-pc ;; amd64-*) - basic_machine=x86_64-`echo $basic_machine | sed 's/^[^-]*-//'` + basic_machine=x86_64-`echo "$basic_machine" | sed 's/^[^-]*-//'` ;; amdahl) basic_machine=580-amdahl @@ -496,6 +520,9 @@ case $basic_machine in basic_machine=i386-pc os=-aros ;; + asmjs) + basic_machine=asmjs-unknown + ;; aux) basic_machine=m68k-apple os=-aux @@ -509,7 +536,7 @@ case $basic_machine in os=-linux ;; blackfin-*) - basic_machine=bfin-`echo $basic_machine | sed 's/^[^-]*-//'` + basic_machine=bfin-`echo "$basic_machine" | sed 's/^[^-]*-//'` os=-linux ;; bluegene*) @@ -517,13 +544,13 @@ case $basic_machine in os=-cnk ;; c54x-*) - basic_machine=tic54x-`echo $basic_machine | sed 's/^[^-]*-//'` + basic_machine=tic54x-`echo "$basic_machine" | sed 's/^[^-]*-//'` ;; c55x-*) - basic_machine=tic55x-`echo $basic_machine | sed 's/^[^-]*-//'` + basic_machine=tic55x-`echo "$basic_machine" | sed 's/^[^-]*-//'` ;; c6x-*) - basic_machine=tic6x-`echo $basic_machine | sed 's/^[^-]*-//'` + basic_machine=tic6x-`echo "$basic_machine" | sed 's/^[^-]*-//'` ;; c90) basic_machine=c90-cray @@ -612,10 +639,18 @@ case $basic_machine in basic_machine=rs6000-bull os=-bosx ;; - dpx2* | dpx2*-bull) + dpx2*) basic_machine=m68k-bull os=-sysv3 ;; + e500v[12]) + basic_machine=powerpc-unknown + os=$os"spe" + ;; + e500v[12]-*) + basic_machine=powerpc-`echo "$basic_machine" | sed 's/^[^-]*-//'` + os=$os"spe" + ;; ebmon29k) basic_machine=a29k-amd os=-ebmon @@ -705,9 +740,6 @@ case $basic_machine in hp9k8[0-9][0-9] | hp8[0-9][0-9]) basic_machine=hppa1.0-hp ;; - hppa-next) - os=-nextstep3 - ;; hppaosf) basic_machine=hppa1.1-hp os=-osf @@ -719,28 +751,27 @@ case $basic_machine in i370-ibm* | ibm*) basic_machine=i370-ibm ;; -# I'm not sure what "Sysv32" means. Should this be sysv3.2? i*86v32) - basic_machine=`echo $1 | sed -e 's/86.*/86-pc/'` + basic_machine=`echo "$1" | sed -e 's/86.*/86-pc/'` os=-sysv32 ;; i*86v4*) - basic_machine=`echo $1 | sed -e 's/86.*/86-pc/'` + basic_machine=`echo "$1" | sed -e 's/86.*/86-pc/'` os=-sysv4 ;; i*86v) - basic_machine=`echo $1 | sed -e 's/86.*/86-pc/'` + basic_machine=`echo "$1" | sed -e 's/86.*/86-pc/'` os=-sysv ;; i*86sol2) - basic_machine=`echo $1 | sed -e 's/86.*/86-pc/'` + basic_machine=`echo "$1" | sed -e 's/86.*/86-pc/'` os=-solaris2 ;; i386mach) basic_machine=i386-mach os=-mach ;; - i386-vsta | vsta) + vsta) basic_machine=i386-unknown os=-vsta ;; @@ -758,17 +789,17 @@ case $basic_machine in basic_machine=m68k-isi os=-sysv ;; + leon-*|leon[3-9]-*) + basic_machine=sparc-`echo "$basic_machine" | sed 's/-.*//'` + ;; m68knommu) basic_machine=m68k-unknown os=-linux ;; m68knommu-*) - basic_machine=m68k-`echo $basic_machine | sed 's/^[^-]*-//'` + basic_machine=m68k-`echo "$basic_machine" | sed 's/^[^-]*-//'` os=-linux ;; - m88k-omron*) - basic_machine=m88k-omron - ;; magnum | m3230) basic_machine=mips-mips os=-sysv @@ -777,11 +808,15 @@ case $basic_machine in basic_machine=ns32k-utek os=-sysv ;; - microblaze) + microblaze*) basic_machine=microblaze-xilinx ;; + mingw64) + basic_machine=x86_64-pc + os=-mingw64 + ;; mingw32) - basic_machine=i386-pc + basic_machine=i686-pc os=-mingw32 ;; mingw32ce) @@ -796,10 +831,10 @@ case $basic_machine in os=-mint ;; mips3*-*) - basic_machine=`echo $basic_machine | sed -e 's/mips3/mips64/'` + basic_machine=`echo "$basic_machine" | sed -e 's/mips3/mips64/'` ;; mips3*) - basic_machine=`echo $basic_machine | sed -e 's/mips3/mips64/'`-unknown + basic_machine=`echo "$basic_machine" | sed -e 's/mips3/mips64/'`-unknown ;; monitor) basic_machine=m68k-rom68k @@ -809,15 +844,19 @@ case $basic_machine in basic_machine=powerpc-unknown os=-morphos ;; + moxiebox) + basic_machine=moxie-unknown + os=-moxiebox + ;; msdos) basic_machine=i386-pc os=-msdos ;; ms1-*) - basic_machine=`echo $basic_machine | sed -e 's/ms1-/mt-/'` + basic_machine=`echo "$basic_machine" | sed -e 's/ms1-/mt-/'` ;; msys) - basic_machine=i386-pc + basic_machine=i686-pc os=-msys ;; mvs) @@ -856,7 +895,7 @@ case $basic_machine in basic_machine=v70-nec os=-sysv ;; - next | m*-next ) + next | m*-next) basic_machine=m68k-next case $os in -nextstep* ) @@ -901,6 +940,12 @@ case $basic_machine in nsr-tandem) basic_machine=nsr-tandem ;; + nsv-tandem) + basic_machine=nsv-tandem + ;; + nsx-tandem) + basic_machine=nsx-tandem + ;; op50n-* | op60c-*) basic_machine=hppa1.1-oki os=-proelf @@ -933,7 +978,7 @@ case $basic_machine in os=-linux ;; parisc-*) - basic_machine=hppa-`echo $basic_machine | sed 's/^[^-]*-//'` + basic_machine=hppa-`echo "$basic_machine" | sed 's/^[^-]*-//'` os=-linux ;; pbd) @@ -949,7 +994,7 @@ case $basic_machine in basic_machine=i386-pc ;; pc98-*) - basic_machine=i386-`echo $basic_machine | sed 's/^[^-]*-//'` + basic_machine=i386-`echo "$basic_machine" | sed 's/^[^-]*-//'` ;; pentium | p5 | k5 | k6 | nexgen | viac3) basic_machine=i586-pc @@ -964,16 +1009,16 @@ case $basic_machine in basic_machine=i786-pc ;; pentium-* | p5-* | k5-* | k6-* | nexgen-* | viac3-*) - basic_machine=i586-`echo $basic_machine | sed 's/^[^-]*-//'` + basic_machine=i586-`echo "$basic_machine" | sed 's/^[^-]*-//'` ;; pentiumpro-* | p6-* | 6x86-* | athlon-*) - basic_machine=i686-`echo $basic_machine | sed 's/^[^-]*-//'` + basic_machine=i686-`echo "$basic_machine" | sed 's/^[^-]*-//'` ;; pentiumii-* | pentium2-* | pentiumiii-* | pentium3-*) - basic_machine=i686-`echo $basic_machine | sed 's/^[^-]*-//'` + basic_machine=i686-`echo "$basic_machine" | sed 's/^[^-]*-//'` ;; pentium4-*) - basic_machine=i786-`echo $basic_machine | sed 's/^[^-]*-//'` + basic_machine=i786-`echo "$basic_machine" | sed 's/^[^-]*-//'` ;; pn) basic_machine=pn-gould @@ -983,23 +1028,23 @@ case $basic_machine in ppc | ppcbe) basic_machine=powerpc-unknown ;; ppc-* | ppcbe-*) - basic_machine=powerpc-`echo $basic_machine | sed 's/^[^-]*-//'` + basic_machine=powerpc-`echo "$basic_machine" | sed 's/^[^-]*-//'` ;; - ppcle | powerpclittle | ppc-le | powerpc-little) + ppcle | powerpclittle) basic_machine=powerpcle-unknown ;; ppcle-* | powerpclittle-*) - basic_machine=powerpcle-`echo $basic_machine | sed 's/^[^-]*-//'` + basic_machine=powerpcle-`echo "$basic_machine" | sed 's/^[^-]*-//'` ;; ppc64) basic_machine=powerpc64-unknown ;; - ppc64-*) basic_machine=powerpc64-`echo $basic_machine | sed 's/^[^-]*-//'` + ppc64-*) basic_machine=powerpc64-`echo "$basic_machine" | sed 's/^[^-]*-//'` ;; - ppc64le | powerpc64little | ppc64-le | powerpc64-little) + ppc64le | powerpc64little) basic_machine=powerpc64le-unknown ;; ppc64le-* | powerpc64little-*) - basic_machine=powerpc64le-`echo $basic_machine | sed 's/^[^-]*-//'` + basic_machine=powerpc64le-`echo "$basic_machine" | sed 's/^[^-]*-//'` ;; ps2) basic_machine=i386-ibm @@ -1008,7 +1053,11 @@ case $basic_machine in basic_machine=i586-unknown os=-pw32 ;; - rdos) + rdos | rdos64) + basic_machine=x86_64-pc + os=-rdos + ;; + rdos32) basic_machine=i386-pc os=-rdos ;; @@ -1049,17 +1098,10 @@ case $basic_machine in sequent) basic_machine=i386-sequent ;; - sh) - basic_machine=sh-hitachi - os=-hms - ;; sh5el) basic_machine=sh5le-unknown ;; - sh64) - basic_machine=sh64-unknown - ;; - sparclite-wrs | simso-wrs) + simso-wrs) basic_machine=sparclite-wrs os=-vxworks ;; @@ -1078,7 +1120,7 @@ case $basic_machine in os=-sysv4 ;; strongarm-* | thumb-*) - basic_machine=arm-`echo $basic_machine | sed 's/^[^-]*-//'` + basic_machine=arm-`echo "$basic_machine" | sed 's/^[^-]*-//'` ;; sun2) basic_machine=m68000-sun @@ -1200,6 +1242,9 @@ case $basic_machine in basic_machine=hppa1.1-winbond os=-proelf ;; + x64) + basic_machine=x86_64-pc + ;; xbox) basic_machine=i686-pc os=-mingw32 @@ -1208,20 +1253,12 @@ case $basic_machine in basic_machine=xps100-honeywell ;; xscale-* | xscalee[bl]-*) - basic_machine=`echo $basic_machine | sed 's/^xscale/arm/'` + basic_machine=`echo "$basic_machine" | sed 's/^xscale/arm/'` ;; ymp) basic_machine=ymp-cray os=-unicos ;; - z8k-*-coff) - basic_machine=z8k-unknown - os=-sim - ;; - z80-*-coff) - basic_machine=z80-unknown - os=-sim - ;; none) basic_machine=none-none os=-none @@ -1250,10 +1287,6 @@ case $basic_machine in vax) basic_machine=vax-dec ;; - pdp10) - # there are many clones, so DEC is not a safe bet - basic_machine=pdp10-unknown - ;; pdp11) basic_machine=pdp11-dec ;; @@ -1263,9 +1296,6 @@ case $basic_machine in sh[1234] | sh[24]a | sh[24]aeb | sh[34]eb | sh[1234]le | sh[23]ele) basic_machine=sh-unknown ;; - sparc | sparcv8 | sparcv9 | sparcv9b | sparcv9v) - basic_machine=sparc-sun - ;; cydra) basic_machine=cydra-cydrome ;; @@ -1285,7 +1315,7 @@ case $basic_machine in # Make sure to match an already-canonicalized machine name. ;; *) - echo Invalid configuration \`$1\': machine \`$basic_machine\' not recognized 1>&2 + echo Invalid configuration \`"$1"\': machine \`"$basic_machine"\' not recognized 1>&2 exit 1 ;; esac @@ -1293,10 +1323,10 @@ esac # Here we canonicalize certain aliases for manufacturers. case $basic_machine in *-digital*) - basic_machine=`echo $basic_machine | sed 's/digital.*/dec/'` + basic_machine=`echo "$basic_machine" | sed 's/digital.*/dec/'` ;; *-commodore*) - basic_machine=`echo $basic_machine | sed 's/commodore.*/cbm/'` + basic_machine=`echo "$basic_machine" | sed 's/commodore.*/cbm/'` ;; *) ;; @@ -1307,8 +1337,8 @@ esac if [ x"$os" != x"" ] then case $os in - # First match some system type aliases - # that might get confused with valid system types. + # First match some system type aliases that might get confused + # with valid system types. # -solaris* is a basic system type, with this one exception. -auroraux) os=-auroraux @@ -1319,45 +1349,48 @@ case $os in -solaris) os=-solaris2 ;; - -svr4*) - os=-sysv4 - ;; -unixware*) os=-sysv4.2uw ;; -gnu/linux*) os=`echo $os | sed -e 's|gnu/linux|linux-gnu|'` ;; - # First accept the basic system types. + # es1800 is here to avoid being matched by es* (a different OS) + -es1800*) + os=-ose + ;; + # Now accept the basic system types. # The portable systems comes first. - # Each alternative MUST END IN A *, to match a version number. + # Each alternative MUST end in a * to match a version number. # -sysv* is not here because it comes later, after sysvr4. -gnu* | -bsd* | -mach* | -minix* | -genix* | -ultrix* | -irix* \ | -*vms* | -sco* | -esix* | -isc* | -aix* | -cnk* | -sunos | -sunos[34]*\ | -hpux* | -unos* | -osf* | -luna* | -dgux* | -auroraux* | -solaris* \ - | -sym* | -kopensolaris* \ + | -sym* | -kopensolaris* | -plan9* \ | -amigaos* | -amigados* | -msdos* | -newsos* | -unicos* | -aof* \ - | -aos* | -aros* \ + | -aos* | -aros* | -cloudabi* | -sortix* \ | -nindy* | -vxsim* | -vxworks* | -ebmon* | -hms* | -mvs* \ | -clix* | -riscos* | -uniplus* | -iris* | -rtu* | -xenix* \ - | -hiux* | -386bsd* | -knetbsd* | -mirbsd* | -netbsd* \ - | -openbsd* | -solidbsd* \ + | -hiux* | -knetbsd* | -mirbsd* | -netbsd* \ + | -bitrig* | -openbsd* | -solidbsd* | -libertybsd* \ | -ekkobsd* | -kfreebsd* | -freebsd* | -riscix* | -lynxos* \ | -bosx* | -nextstep* | -cxux* | -aout* | -elf* | -oabi* \ | -ptx* | -coff* | -ecoff* | -winnt* | -domain* | -vsta* \ - | -udi* | -eabi* | -lites* | -ieee* | -go32* | -aux* \ - | -chorusos* | -chorusrdb* | -cegcc* \ + | -udi* | -eabi* | -lites* | -ieee* | -go32* | -aux* | -hcos* \ + | -chorusos* | -chorusrdb* | -cegcc* | -glidix* \ | -cygwin* | -msys* | -pe* | -psos* | -moss* | -proelf* | -rtems* \ - | -mingw32* | -linux-gnu* | -linux-android* \ - | -linux-newlib* | -linux-uclibc* \ - | -uxpv* | -beos* | -mpeix* | -udk* \ - | -interix* | -uwin* | -mks* | -rhapsody* | -darwin* | -opened* \ + | -midipix* | -mingw32* | -mingw64* | -linux-gnu* | -linux-android* \ + | -linux-newlib* | -linux-musl* | -linux-uclibc* \ + | -uxpv* | -beos* | -mpeix* | -udk* | -moxiebox* \ + | -interix* | -uwin* | -mks* | -rhapsody* | -darwin* \ | -openstep* | -oskit* | -conix* | -pw32* | -nonstopux* \ | -storm-chaos* | -tops10* | -tenex* | -tops20* | -its* \ | -os2* | -vos* | -palmos* | -uclinux* | -nucleus* \ - | -morphos* | -superux* | -rtmk* | -rtmk-nova* | -windiss* \ + | -morphos* | -superux* | -rtmk* | -windiss* \ | -powermax* | -dnix* | -nx6 | -nx7 | -sei* | -dragonfly* \ - | -skyos* | -haiku* | -rdos* | -toppers* | -drops* | -es*) + | -skyos* | -haiku* | -rdos* | -toppers* | -drops* | -es* \ + | -onefs* | -tirtos* | -phoenix* | -fuchsia* | -redox* | -bme* \ + | -midnightbsd*) # Remember, each alternative MUST END IN *, to match a version number. ;; -qnx*) @@ -1374,12 +1407,12 @@ case $os in -nto*) os=`echo $os | sed -e 's|nto|nto-qnx|'` ;; - -sim | -es1800* | -hms* | -xray | -os68k* | -none* | -v88r* \ - | -windows* | -osx | -abug | -netware* | -os9* | -beos* | -haiku* \ + -sim | -xray | -os68k* | -v88r* \ + | -windows* | -osx | -abug | -netware* | -os9* \ | -macos* | -mpw* | -magic* | -mmixware* | -mon960* | -lnews*) ;; -mac*) - os=`echo $os | sed -e 's|mac|macos|'` + os=`echo "$os" | sed -e 's|mac|macos|'` ;; -linux-dietlibc) os=-linux-dietlibc @@ -1388,10 +1421,10 @@ case $os in os=`echo $os | sed -e 's|linux|linux-gnu|'` ;; -sunos5*) - os=`echo $os | sed -e 's|sunos5|solaris2|'` + os=`echo "$os" | sed -e 's|sunos5|solaris2|'` ;; -sunos6*) - os=`echo $os | sed -e 's|sunos6|solaris3|'` + os=`echo "$os" | sed -e 's|sunos6|solaris3|'` ;; -opened*) os=-openedition @@ -1402,12 +1435,6 @@ case $os in -wince*) os=-wince ;; - -osfrose*) - os=-osfrose - ;; - -osf*) - os=-osf - ;; -utek*) os=-bsd ;; @@ -1432,7 +1459,7 @@ case $os in -nova*) os=-rtmk-nova ;; - -ns2 ) + -ns2) os=-nextstep2 ;; -nsk*) @@ -1454,7 +1481,7 @@ case $os in -oss*) os=-sysv3 ;; - -svr4) + -svr4*) os=-sysv4 ;; -svr3) @@ -1469,35 +1496,38 @@ case $os in -ose*) os=-ose ;; - -es1800*) - os=-ose - ;; - -xenix) - os=-xenix - ;; -*mint | -mint[0-9]* | -*MiNT | -MiNT[0-9]*) os=-mint ;; - -aros*) - os=-aros - ;; - -kaos*) - os=-kaos - ;; -zvmoe) os=-zvmoe ;; -dicos*) os=-dicos ;; + -pikeos*) + # Until real need of OS specific support for + # particular features comes up, bare metal + # configurations are quite functional. + case $basic_machine in + arm*) + os=-eabi + ;; + *) + os=-elf + ;; + esac + ;; -nacl*) ;; + -ios) + ;; -none) ;; *) # Get rid of the `-' at the beginning of $os. os=`echo $os | sed 's/[^-]*-//'` - echo Invalid configuration \`$1\': system \`$os\' not recognized 1>&2 + echo Invalid configuration \`"$1"\': system \`"$os"\' not recognized 1>&2 exit 1 ;; esac @@ -1532,6 +1562,12 @@ case $basic_machine in c4x-* | tic4x-*) os=-coff ;; + c8051-*) + os=-elf + ;; + hexagon-*) + os=-elf + ;; tic54x-*) os=-coff ;; @@ -1559,9 +1595,6 @@ case $basic_machine in ;; m68000-sun) os=-sunos3 - # This also exists in the configure program, but was not the - # default. - # os=-sunos4 ;; m68*-cisco) os=-aout @@ -1584,12 +1617,12 @@ case $basic_machine in sparc-* | *-sun) os=-sunos4.1.1 ;; + pru-*) + os=-elf + ;; *-be) os=-beos ;; - *-haiku) - os=-haiku - ;; *-ibm) os=-aix ;; @@ -1629,7 +1662,7 @@ case $basic_machine in m88k-omron*) os=-luna ;; - *-next ) + *-next) os=-nextstep ;; *-sequent) @@ -1644,9 +1677,6 @@ case $basic_machine in i370-*) os=-mvs ;; - *-next) - os=-nextstep3 - ;; *-gould) os=-sysv ;; @@ -1756,15 +1786,15 @@ case $basic_machine in vendor=stratus ;; esac - basic_machine=`echo $basic_machine | sed "s/unknown/$vendor/"` + basic_machine=`echo "$basic_machine" | sed "s/unknown/$vendor/"` ;; esac -echo $basic_machine$os +echo "$basic_machine$os" exit # Local variables: -# eval: (add-hook 'write-file-hooks 'time-stamp) +# eval: (add-hook 'before-save-hook 'time-stamp) # time-stamp-start: "timestamp='" # time-stamp-format: "%:y-%02m-%02d" # time-stamp-end: "'" diff --git a/extern/libpng/configure b/extern/libpng/configure new file mode 100755 index 0000000000..1b2c46366b --- /dev/null +++ b/extern/libpng/configure @@ -0,0 +1,16116 @@ +#! /bin/sh +# Guess values for system-dependent variables and create Makefiles. +# Generated by GNU Autoconf 2.69 for libpng 1.6.37. +# +# Report bugs to . +# +# +# Copyright (C) 1992-1996, 1998-2012 Free Software Foundation, Inc. +# +# +# This configure script is free software; the Free Software Foundation +# gives unlimited permission to copy, distribute and modify it. +## -------------------- ## +## M4sh Initialization. ## +## -------------------- ## + +# Be more Bourne compatible +DUALCASE=1; export DUALCASE # for MKS sh +if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then : + emulate sh + NULLCMD=: + # Pre-4.2 versions of Zsh do word splitting on ${1+"$@"}, which + # is contrary to our usage. Disable this feature. + alias -g '${1+"$@"}'='"$@"' + setopt NO_GLOB_SUBST +else + case `(set -o) 2>/dev/null` in #( + *posix*) : + set -o posix ;; #( + *) : + ;; +esac +fi + + +as_nl=' +' +export as_nl +# Printing a long string crashes Solaris 7 /usr/bin/printf. +as_echo='\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\' +as_echo=$as_echo$as_echo$as_echo$as_echo$as_echo +as_echo=$as_echo$as_echo$as_echo$as_echo$as_echo$as_echo +# Prefer a ksh shell builtin over an external printf program on Solaris, +# but without wasting forks for bash or zsh. +if test -z "$BASH_VERSION$ZSH_VERSION" \ + && (test "X`print -r -- $as_echo`" = "X$as_echo") 2>/dev/null; then + as_echo='print -r --' + as_echo_n='print -rn --' +elif (test "X`printf %s $as_echo`" = "X$as_echo") 2>/dev/null; then + as_echo='printf %s\n' + as_echo_n='printf %s' +else + if test "X`(/usr/ucb/echo -n -n $as_echo) 2>/dev/null`" = "X-n $as_echo"; then + as_echo_body='eval /usr/ucb/echo -n "$1$as_nl"' + as_echo_n='/usr/ucb/echo -n' + else + as_echo_body='eval expr "X$1" : "X\\(.*\\)"' + as_echo_n_body='eval + arg=$1; + case $arg in #( + *"$as_nl"*) + expr "X$arg" : "X\\(.*\\)$as_nl"; + arg=`expr "X$arg" : ".*$as_nl\\(.*\\)"`;; + esac; + expr "X$arg" : "X\\(.*\\)" | tr -d "$as_nl" + ' + export as_echo_n_body + as_echo_n='sh -c $as_echo_n_body as_echo' + fi + export as_echo_body + as_echo='sh -c $as_echo_body as_echo' +fi + +# The user is always right. +if test "${PATH_SEPARATOR+set}" != set; then + PATH_SEPARATOR=: + (PATH='/bin;/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 && { + (PATH='/bin:/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 || + PATH_SEPARATOR=';' + } +fi + + +# IFS +# We need space, tab and new line, in precisely that order. Quoting is +# there to prevent editors from complaining about space-tab. +# (If _AS_PATH_WALK were called with IFS unset, it would disable word +# splitting by setting IFS to empty value.) +IFS=" "" $as_nl" + +# Find who we are. Look in the path if we contain no directory separator. +as_myself= +case $0 in #(( + *[\\/]* ) as_myself=$0 ;; + *) as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + test -r "$as_dir/$0" && as_myself=$as_dir/$0 && break + done +IFS=$as_save_IFS + + ;; +esac +# We did not find ourselves, most probably we were run as `sh COMMAND' +# in which case we are not to be found in the path. +if test "x$as_myself" = x; then + as_myself=$0 +fi +if test ! -f "$as_myself"; then + $as_echo "$as_myself: error: cannot find myself; rerun with an absolute file name" >&2 + exit 1 +fi + +# Unset variables that we do not need and which cause bugs (e.g. in +# pre-3.0 UWIN ksh). But do not cause bugs in bash 2.01; the "|| exit 1" +# suppresses any "Segmentation fault" message there. '((' could +# trigger a bug in pdksh 5.2.14. +for as_var in BASH_ENV ENV MAIL MAILPATH +do eval test x\${$as_var+set} = xset \ + && ( (unset $as_var) || exit 1) >/dev/null 2>&1 && unset $as_var || : +done +PS1='$ ' +PS2='> ' +PS4='+ ' + +# NLS nuisances. +LC_ALL=C +export LC_ALL +LANGUAGE=C +export LANGUAGE + +# CDPATH. +(unset CDPATH) >/dev/null 2>&1 && unset CDPATH + +# Use a proper internal environment variable to ensure we don't fall + # into an infinite loop, continuously re-executing ourselves. + if test x"${_as_can_reexec}" != xno && test "x$CONFIG_SHELL" != x; then + _as_can_reexec=no; export _as_can_reexec; + # We cannot yet assume a decent shell, so we have to provide a +# neutralization value for shells without unset; and this also +# works around shells that cannot unset nonexistent variables. +# Preserve -v and -x to the replacement shell. +BASH_ENV=/dev/null +ENV=/dev/null +(unset BASH_ENV) >/dev/null 2>&1 && unset BASH_ENV ENV +case $- in # (((( + *v*x* | *x*v* ) as_opts=-vx ;; + *v* ) as_opts=-v ;; + *x* ) as_opts=-x ;; + * ) as_opts= ;; +esac +exec $CONFIG_SHELL $as_opts "$as_myself" ${1+"$@"} +# Admittedly, this is quite paranoid, since all the known shells bail +# out after a failed `exec'. +$as_echo "$0: could not re-execute with $CONFIG_SHELL" >&2 +as_fn_exit 255 + fi + # We don't want this to propagate to other subprocesses. + { _as_can_reexec=; unset _as_can_reexec;} +if test "x$CONFIG_SHELL" = x; then + as_bourne_compatible="if test -n \"\${ZSH_VERSION+set}\" && (emulate sh) >/dev/null 2>&1; then : + emulate sh + NULLCMD=: + # Pre-4.2 versions of Zsh do word splitting on \${1+\"\$@\"}, which + # is contrary to our usage. Disable this feature. + alias -g '\${1+\"\$@\"}'='\"\$@\"' + setopt NO_GLOB_SUBST +else + case \`(set -o) 2>/dev/null\` in #( + *posix*) : + set -o posix ;; #( + *) : + ;; +esac +fi +" + as_required="as_fn_return () { (exit \$1); } +as_fn_success () { as_fn_return 0; } +as_fn_failure () { as_fn_return 1; } +as_fn_ret_success () { return 0; } +as_fn_ret_failure () { return 1; } + +exitcode=0 +as_fn_success || { exitcode=1; echo as_fn_success failed.; } +as_fn_failure && { exitcode=1; echo as_fn_failure succeeded.; } +as_fn_ret_success || { exitcode=1; echo as_fn_ret_success failed.; } +as_fn_ret_failure && { exitcode=1; echo as_fn_ret_failure succeeded.; } +if ( set x; as_fn_ret_success y && test x = \"\$1\" ); then : + +else + exitcode=1; echo positional parameters were not saved. +fi +test x\$exitcode = x0 || exit 1 +test -x / || exit 1" + as_suggested=" as_lineno_1=";as_suggested=$as_suggested$LINENO;as_suggested=$as_suggested" as_lineno_1a=\$LINENO + as_lineno_2=";as_suggested=$as_suggested$LINENO;as_suggested=$as_suggested" as_lineno_2a=\$LINENO + eval 'test \"x\$as_lineno_1'\$as_run'\" != \"x\$as_lineno_2'\$as_run'\" && + test \"x\`expr \$as_lineno_1'\$as_run' + 1\`\" = \"x\$as_lineno_2'\$as_run'\"' || exit 1 +test \$(( 1 + 1 )) = 2 || exit 1 + + test -n \"\${ZSH_VERSION+set}\${BASH_VERSION+set}\" || ( + ECHO='\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\' + ECHO=\$ECHO\$ECHO\$ECHO\$ECHO\$ECHO + ECHO=\$ECHO\$ECHO\$ECHO\$ECHO\$ECHO\$ECHO + PATH=/empty FPATH=/empty; export PATH FPATH + test \"X\`printf %s \$ECHO\`\" = \"X\$ECHO\" \\ + || test \"X\`print -r -- \$ECHO\`\" = \"X\$ECHO\" ) || exit 1" + if (eval "$as_required") 2>/dev/null; then : + as_have_required=yes +else + as_have_required=no +fi + if test x$as_have_required = xyes && (eval "$as_suggested") 2>/dev/null; then : + +else + as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +as_found=false +for as_dir in /bin$PATH_SEPARATOR/usr/bin$PATH_SEPARATOR$PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + as_found=: + case $as_dir in #( + /*) + for as_base in sh bash ksh sh5; do + # Try only shells that exist, to save several forks. + as_shell=$as_dir/$as_base + if { test -f "$as_shell" || test -f "$as_shell.exe"; } && + { $as_echo "$as_bourne_compatible""$as_required" | as_run=a "$as_shell"; } 2>/dev/null; then : + CONFIG_SHELL=$as_shell as_have_required=yes + if { $as_echo "$as_bourne_compatible""$as_suggested" | as_run=a "$as_shell"; } 2>/dev/null; then : + break 2 +fi +fi + done;; + esac + as_found=false +done +$as_found || { if { test -f "$SHELL" || test -f "$SHELL.exe"; } && + { $as_echo "$as_bourne_compatible""$as_required" | as_run=a "$SHELL"; } 2>/dev/null; then : + CONFIG_SHELL=$SHELL as_have_required=yes +fi; } +IFS=$as_save_IFS + + + if test "x$CONFIG_SHELL" != x; then : + export CONFIG_SHELL + # We cannot yet assume a decent shell, so we have to provide a +# neutralization value for shells without unset; and this also +# works around shells that cannot unset nonexistent variables. +# Preserve -v and -x to the replacement shell. +BASH_ENV=/dev/null +ENV=/dev/null +(unset BASH_ENV) >/dev/null 2>&1 && unset BASH_ENV ENV +case $- in # (((( + *v*x* | *x*v* ) as_opts=-vx ;; + *v* ) as_opts=-v ;; + *x* ) as_opts=-x ;; + * ) as_opts= ;; +esac +exec $CONFIG_SHELL $as_opts "$as_myself" ${1+"$@"} +# Admittedly, this is quite paranoid, since all the known shells bail +# out after a failed `exec'. +$as_echo "$0: could not re-execute with $CONFIG_SHELL" >&2 +exit 255 +fi + + if test x$as_have_required = xno; then : + $as_echo "$0: This script requires a shell more modern than all" + $as_echo "$0: the shells that I found on your system." + if test x${ZSH_VERSION+set} = xset ; then + $as_echo "$0: In particular, zsh $ZSH_VERSION has bugs and should" + $as_echo "$0: be upgraded to zsh 4.3.4 or later." + else + $as_echo "$0: Please tell bug-autoconf@gnu.org and +$0: png-mng-implement@lists.sourceforge.net about your +$0: system, including any error possibly output before this +$0: message. Then install a modern shell, or manually run +$0: the script under such a shell if you do have one." + fi + exit 1 +fi +fi +fi +SHELL=${CONFIG_SHELL-/bin/sh} +export SHELL +# Unset more variables known to interfere with behavior of common tools. +CLICOLOR_FORCE= GREP_OPTIONS= +unset CLICOLOR_FORCE GREP_OPTIONS + +## --------------------- ## +## M4sh Shell Functions. ## +## --------------------- ## +# as_fn_unset VAR +# --------------- +# Portably unset VAR. +as_fn_unset () +{ + { eval $1=; unset $1;} +} +as_unset=as_fn_unset + +# as_fn_set_status STATUS +# ----------------------- +# Set $? to STATUS, without forking. +as_fn_set_status () +{ + return $1 +} # as_fn_set_status + +# as_fn_exit STATUS +# ----------------- +# Exit the shell with STATUS, even in a "trap 0" or "set -e" context. +as_fn_exit () +{ + set +e + as_fn_set_status $1 + exit $1 +} # as_fn_exit + +# as_fn_mkdir_p +# ------------- +# Create "$as_dir" as a directory, including parents if necessary. +as_fn_mkdir_p () +{ + + case $as_dir in #( + -*) as_dir=./$as_dir;; + esac + test -d "$as_dir" || eval $as_mkdir_p || { + as_dirs= + while :; do + case $as_dir in #( + *\'*) as_qdir=`$as_echo "$as_dir" | sed "s/'/'\\\\\\\\''/g"`;; #'( + *) as_qdir=$as_dir;; + esac + as_dirs="'$as_qdir' $as_dirs" + as_dir=`$as_dirname -- "$as_dir" || +$as_expr X"$as_dir" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \ + X"$as_dir" : 'X\(//\)[^/]' \| \ + X"$as_dir" : 'X\(//\)$' \| \ + X"$as_dir" : 'X\(/\)' \| . 2>/dev/null || +$as_echo X"$as_dir" | + sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{ + s//\1/ + q + } + /^X\(\/\/\)[^/].*/{ + s//\1/ + q + } + /^X\(\/\/\)$/{ + s//\1/ + q + } + /^X\(\/\).*/{ + s//\1/ + q + } + s/.*/./; q'` + test -d "$as_dir" && break + done + test -z "$as_dirs" || eval "mkdir $as_dirs" + } || test -d "$as_dir" || as_fn_error $? "cannot create directory $as_dir" + + +} # as_fn_mkdir_p + +# as_fn_executable_p FILE +# ----------------------- +# Test if FILE is an executable regular file. +as_fn_executable_p () +{ + test -f "$1" && test -x "$1" +} # as_fn_executable_p +# as_fn_append VAR VALUE +# ---------------------- +# Append the text in VALUE to the end of the definition contained in VAR. Take +# advantage of any shell optimizations that allow amortized linear growth over +# repeated appends, instead of the typical quadratic growth present in naive +# implementations. +if (eval "as_var=1; as_var+=2; test x\$as_var = x12") 2>/dev/null; then : + eval 'as_fn_append () + { + eval $1+=\$2 + }' +else + as_fn_append () + { + eval $1=\$$1\$2 + } +fi # as_fn_append + +# as_fn_arith ARG... +# ------------------ +# Perform arithmetic evaluation on the ARGs, and store the result in the +# global $as_val. Take advantage of shells that can avoid forks. The arguments +# must be portable across $(()) and expr. +if (eval "test \$(( 1 + 1 )) = 2") 2>/dev/null; then : + eval 'as_fn_arith () + { + as_val=$(( $* )) + }' +else + as_fn_arith () + { + as_val=`expr "$@" || test $? -eq 1` + } +fi # as_fn_arith + + +# as_fn_error STATUS ERROR [LINENO LOG_FD] +# ---------------------------------------- +# Output "`basename $0`: error: ERROR" to stderr. If LINENO and LOG_FD are +# provided, also output the error to LOG_FD, referencing LINENO. Then exit the +# script with STATUS, using 1 if that was 0. +as_fn_error () +{ + as_status=$1; test $as_status -eq 0 && as_status=1 + if test "$4"; then + as_lineno=${as_lineno-"$3"} as_lineno_stack=as_lineno_stack=$as_lineno_stack + $as_echo "$as_me:${as_lineno-$LINENO}: error: $2" >&$4 + fi + $as_echo "$as_me: error: $2" >&2 + as_fn_exit $as_status +} # as_fn_error + +if expr a : '\(a\)' >/dev/null 2>&1 && + test "X`expr 00001 : '.*\(...\)'`" = X001; then + as_expr=expr +else + as_expr=false +fi + +if (basename -- /) >/dev/null 2>&1 && test "X`basename -- / 2>&1`" = "X/"; then + as_basename=basename +else + as_basename=false +fi + +if (as_dir=`dirname -- /` && test "X$as_dir" = X/) >/dev/null 2>&1; then + as_dirname=dirname +else + as_dirname=false +fi + +as_me=`$as_basename -- "$0" || +$as_expr X/"$0" : '.*/\([^/][^/]*\)/*$' \| \ + X"$0" : 'X\(//\)$' \| \ + X"$0" : 'X\(/\)' \| . 2>/dev/null || +$as_echo X/"$0" | + sed '/^.*\/\([^/][^/]*\)\/*$/{ + s//\1/ + q + } + /^X\/\(\/\/\)$/{ + s//\1/ + q + } + /^X\/\(\/\).*/{ + s//\1/ + q + } + s/.*/./; q'` + +# Avoid depending upon Character Ranges. +as_cr_letters='abcdefghijklmnopqrstuvwxyz' +as_cr_LETTERS='ABCDEFGHIJKLMNOPQRSTUVWXYZ' +as_cr_Letters=$as_cr_letters$as_cr_LETTERS +as_cr_digits='0123456789' +as_cr_alnum=$as_cr_Letters$as_cr_digits + + + as_lineno_1=$LINENO as_lineno_1a=$LINENO + as_lineno_2=$LINENO as_lineno_2a=$LINENO + eval 'test "x$as_lineno_1'$as_run'" != "x$as_lineno_2'$as_run'" && + test "x`expr $as_lineno_1'$as_run' + 1`" = "x$as_lineno_2'$as_run'"' || { + # Blame Lee E. McMahon (1931-1989) for sed's syntax. :-) + sed -n ' + p + /[$]LINENO/= + ' <$as_myself | + sed ' + s/[$]LINENO.*/&-/ + t lineno + b + :lineno + N + :loop + s/[$]LINENO\([^'$as_cr_alnum'_].*\n\)\(.*\)/\2\1\2/ + t loop + s/-\n.*// + ' >$as_me.lineno && + chmod +x "$as_me.lineno" || + { $as_echo "$as_me: error: cannot create $as_me.lineno; rerun with a POSIX shell" >&2; as_fn_exit 1; } + + # If we had to re-execute with $CONFIG_SHELL, we're ensured to have + # already done that, so ensure we don't try to do so again and fall + # in an infinite loop. This has already happened in practice. + _as_can_reexec=no; export _as_can_reexec + # Don't try to exec as it changes $[0], causing all sort of problems + # (the dirname of $[0] is not the place where we might find the + # original and so on. Autoconf is especially sensitive to this). + . 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See below for descriptions of some of the useful variables. + +Defaults for the options are specified in brackets. + +Configuration: + -h, --help display this help and exit + --help=short display options specific to this package + --help=recursive display the short help of all the included packages + -V, --version display version information and exit + -q, --quiet, --silent do not print \`checking ...' messages + --cache-file=FILE cache test results in FILE [disabled] + -C, --config-cache alias for \`--cache-file=config.cache' + -n, --no-create do not create output files + --srcdir=DIR find the sources in DIR [configure dir or \`..'] + +Installation directories: + --prefix=PREFIX install architecture-independent files in PREFIX + [$ac_default_prefix] + --exec-prefix=EPREFIX install architecture-dependent files in EPREFIX + [PREFIX] + +By default, \`make install' will install all the files in +\`$ac_default_prefix/bin', \`$ac_default_prefix/lib' etc. You can specify +an installation prefix other than \`$ac_default_prefix' using \`--prefix', +for instance \`--prefix=\$HOME'. + +For better control, use the options below. + +Fine tuning of the installation directories: + --bindir=DIR user executables [EPREFIX/bin] + --sbindir=DIR system admin executables [EPREFIX/sbin] + --libexecdir=DIR program executables [EPREFIX/libexec] + --sysconfdir=DIR read-only single-machine data [PREFIX/etc] + --sharedstatedir=DIR modifiable architecture-independent data [PREFIX/com] + --localstatedir=DIR modifiable single-machine data [PREFIX/var] + --libdir=DIR object code libraries [EPREFIX/lib] + --includedir=DIR C header files [PREFIX/include] + --oldincludedir=DIR C header files for non-gcc [/usr/include] + --datarootdir=DIR read-only arch.-independent data root [PREFIX/share] + --datadir=DIR read-only architecture-independent data [DATAROOTDIR] + --infodir=DIR info documentation [DATAROOTDIR/info] + --localedir=DIR locale-dependent data [DATAROOTDIR/locale] + --mandir=DIR man documentation [DATAROOTDIR/man] + --docdir=DIR documentation root [DATAROOTDIR/doc/libpng] + --htmldir=DIR html documentation [DOCDIR] + --dvidir=DIR dvi documentation [DOCDIR] + --pdfdir=DIR pdf documentation [DOCDIR] + --psdir=DIR ps documentation [DOCDIR] +_ACEOF + + cat <<\_ACEOF + +Program names: + --program-prefix=PREFIX prepend PREFIX to installed program names + --program-suffix=SUFFIX append SUFFIX to installed program names + --program-transform-name=PROGRAM run sed PROGRAM on installed program names + +System types: + --build=BUILD configure for building on BUILD [guessed] + --host=HOST cross-compile to build programs to run on HOST [BUILD] +_ACEOF +fi + +if test -n "$ac_init_help"; then + case $ac_init_help in + short | recursive ) echo "Configuration of libpng 1.6.37:";; + esac + cat <<\_ACEOF + +Optional Features: + --disable-option-checking ignore unrecognized --enable/--with options + --disable-FEATURE do not include FEATURE (same as --enable-FEATURE=no) + --enable-FEATURE[=ARG] include FEATURE [ARG=yes] + --enable-silent-rules less verbose build output (undo: "make V=1") + --disable-silent-rules verbose build output (undo: "make V=0") + --enable-maintainer-mode + enable make rules and dependencies not useful (and + sometimes confusing) to the casual installer + --enable-dependency-tracking + do not reject slow dependency extractors + --disable-dependency-tracking + speeds up one-time build + --enable-shared[=PKGS] build shared libraries [default=yes] + --enable-static[=PKGS] build static libraries [default=yes] + --enable-fast-install[=PKGS] + optimize for fast installation [default=yes] + --disable-libtool-lock avoid locking (might break parallel builds) + --enable-werror[=OPT] Pass -Werror or the given argument to the compiler + if it is supported + --enable-unversioned-links + Installed libpng header files are placed in a + versioned subdirectory and installed libpng library + (including DLL) files are versioned. 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"unsafe absolute working directory name" "$LINENO" 5;; +esac +case $srcdir in + *[\\\"\#\$\&\'\`$am_lf\ \ ]*) + as_fn_error $? "unsafe srcdir value: '$srcdir'" "$LINENO" 5;; +esac + +# Do 'set' in a subshell so we don't clobber the current shell's +# arguments. Must try -L first in case configure is actually a +# symlink; some systems play weird games with the mod time of symlinks +# (eg FreeBSD returns the mod time of the symlink's containing +# directory). +if ( + am_has_slept=no + for am_try in 1 2; do + echo "timestamp, slept: $am_has_slept" > conftest.file + set X `ls -Lt "$srcdir/configure" conftest.file 2> /dev/null` + if test "$*" = "X"; then + # -L didn't work. + set X `ls -t "$srcdir/configure" conftest.file` + fi + if test "$*" != "X $srcdir/configure conftest.file" \ + && test "$*" != "X conftest.file $srcdir/configure"; then + + # If neither matched, then we have a broken ls. This can happen + # if, for instance, CONFIG_SHELL is bash and it inherits a + # broken ls alias from the environment. This has actually + # happened. Such a system could not be considered "sane". + as_fn_error $? "ls -t appears to fail. Make sure there is not a broken + alias in your environment" "$LINENO" 5 + fi + if test "$2" = conftest.file || test $am_try -eq 2; then + break + fi + # Just in case. + sleep 1 + am_has_slept=yes + done + test "$2" = conftest.file + ) +then + # Ok. + : +else + as_fn_error $? "newly created file is older than distributed files! +Check your system clock" "$LINENO" 5 +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5 +$as_echo "yes" >&6; } +# If we didn't sleep, we still need to ensure time stamps of config.status and +# generated files are strictly newer. +am_sleep_pid= +if grep 'slept: no' conftest.file >/dev/null 2>&1; then + ( sleep 1 ) & + am_sleep_pid=$! +fi + +rm -f conftest.file + +test "$program_prefix" != NONE && + program_transform_name="s&^&$program_prefix&;$program_transform_name" +# Use a double $ so make ignores it. +test "$program_suffix" != NONE && + program_transform_name="s&\$&$program_suffix&;$program_transform_name" +# Double any \ or $. +# By default was `s,x,x', remove it if useless. +ac_script='s/[\\$]/&&/g;s/;s,x,x,$//' +program_transform_name=`$as_echo "$program_transform_name" | sed "$ac_script"` + +# Expand $ac_aux_dir to an absolute path. +am_aux_dir=`cd "$ac_aux_dir" && pwd` + +if test x"${MISSING+set}" != xset; then + case $am_aux_dir in + *\ * | *\ *) + MISSING="\${SHELL} \"$am_aux_dir/missing\"" ;; + *) + MISSING="\${SHELL} $am_aux_dir/missing" ;; + esac +fi +# Use eval to expand $SHELL +if eval "$MISSING --is-lightweight"; then + am_missing_run="$MISSING " +else + am_missing_run= + { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: 'missing' script is too old or missing" >&5 +$as_echo "$as_me: WARNING: 'missing' script is too old or missing" >&2;} +fi + +if test x"${install_sh+set}" != xset; then + case $am_aux_dir in + *\ * | *\ *) + install_sh="\${SHELL} '$am_aux_dir/install-sh'" ;; + *) + install_sh="\${SHELL} $am_aux_dir/install-sh" + esac +fi + +# Installed binaries are usually stripped using 'strip' when the user +# run "make install-strip". However 'strip' might not be the right +# tool to use in cross-compilation environments, therefore Automake +# will honor the 'STRIP' environment variable to overrule this program. +if test "$cross_compiling" != no; then + if test -n "$ac_tool_prefix"; then + # Extract the first word of "${ac_tool_prefix}strip", so it can be a program name with args. +set dummy ${ac_tool_prefix}strip; ac_word=$2 +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 +$as_echo_n "checking for $ac_word... " >&6; } +if ${ac_cv_prog_STRIP+:} false; then : + $as_echo_n "(cached) " >&6 +else + if test -n "$STRIP"; then + ac_cv_prog_STRIP="$STRIP" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then + ac_cv_prog_STRIP="${ac_tool_prefix}strip" + $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done + done +IFS=$as_save_IFS + +fi +fi +STRIP=$ac_cv_prog_STRIP +if test -n "$STRIP"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $STRIP" >&5 +$as_echo "$STRIP" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + +fi +if test -z "$ac_cv_prog_STRIP"; then + ac_ct_STRIP=$STRIP + # Extract the first word of "strip", so it can be a program name with args. +set dummy strip; ac_word=$2 +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 +$as_echo_n "checking for $ac_word... " >&6; } +if ${ac_cv_prog_ac_ct_STRIP+:} false; then : + $as_echo_n "(cached) " >&6 +else + if test -n "$ac_ct_STRIP"; then + ac_cv_prog_ac_ct_STRIP="$ac_ct_STRIP" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then + ac_cv_prog_ac_ct_STRIP="strip" + $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done + done +IFS=$as_save_IFS + +fi +fi +ac_ct_STRIP=$ac_cv_prog_ac_ct_STRIP +if test -n "$ac_ct_STRIP"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_STRIP" >&5 +$as_echo "$ac_ct_STRIP" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + if test "x$ac_ct_STRIP" = x; then + STRIP=":" + else + case $cross_compiling:$ac_tool_warned in +yes:) +{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5 +$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;} +ac_tool_warned=yes ;; +esac + STRIP=$ac_ct_STRIP + fi +else + STRIP="$ac_cv_prog_STRIP" +fi + +fi +INSTALL_STRIP_PROGRAM="\$(install_sh) -c -s" + +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for a thread-safe mkdir -p" >&5 +$as_echo_n "checking for a thread-safe mkdir -p... " >&6; } +if test -z "$MKDIR_P"; then + if ${ac_cv_path_mkdir+:} false; then : + $as_echo_n "(cached) " >&6 +else + as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH$PATH_SEPARATOR/opt/sfw/bin +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_prog in mkdir gmkdir; do + for ac_exec_ext in '' $ac_executable_extensions; do + as_fn_executable_p "$as_dir/$ac_prog$ac_exec_ext" || continue + case `"$as_dir/$ac_prog$ac_exec_ext" --version 2>&1` in #( + 'mkdir (GNU coreutils) '* | \ + 'mkdir (coreutils) '* | \ + 'mkdir (fileutils) '4.1*) + ac_cv_path_mkdir=$as_dir/$ac_prog$ac_exec_ext + break 3;; + esac + done + done + done +IFS=$as_save_IFS + +fi + + test -d ./--version && rmdir ./--version + if test "${ac_cv_path_mkdir+set}" = set; then + MKDIR_P="$ac_cv_path_mkdir -p" + else + # As a last resort, use the slow shell script. Don't cache a + # value for MKDIR_P within a source directory, because that will + # break other packages using the cache if that directory is + # removed, or if the value is a relative name. + MKDIR_P="$ac_install_sh -d" + fi +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $MKDIR_P" >&5 +$as_echo "$MKDIR_P" >&6; } + +for ac_prog in gawk mawk nawk awk +do + # Extract the first word of "$ac_prog", so it can be a program name with args. +set dummy $ac_prog; ac_word=$2 +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 +$as_echo_n "checking for $ac_word... " >&6; } +if ${ac_cv_prog_AWK+:} false; then : + $as_echo_n "(cached) " >&6 +else + if test -n "$AWK"; then + ac_cv_prog_AWK="$AWK" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then + ac_cv_prog_AWK="$ac_prog" + $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done + done +IFS=$as_save_IFS + +fi +fi +AWK=$ac_cv_prog_AWK +if test -n "$AWK"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $AWK" >&5 +$as_echo "$AWK" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + + test -n "$AWK" && break +done + +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether ${MAKE-make} sets \$(MAKE)" >&5 +$as_echo_n "checking whether ${MAKE-make} sets \$(MAKE)... " >&6; } +set x ${MAKE-make} +ac_make=`$as_echo "$2" | sed 's/+/p/g; s/[^a-zA-Z0-9_]/_/g'` +if eval \${ac_cv_prog_make_${ac_make}_set+:} false; then : + $as_echo_n "(cached) " >&6 +else + cat >conftest.make <<\_ACEOF +SHELL = /bin/sh +all: + @echo '@@@%%%=$(MAKE)=@@@%%%' +_ACEOF +# GNU make sometimes prints "make[1]: Entering ...", which would confuse us. +case `${MAKE-make} -f conftest.make 2>/dev/null` in + *@@@%%%=?*=@@@%%%*) + eval ac_cv_prog_make_${ac_make}_set=yes;; + *) + eval ac_cv_prog_make_${ac_make}_set=no;; +esac +rm -f conftest.make +fi +if eval test \$ac_cv_prog_make_${ac_make}_set = yes; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5 +$as_echo "yes" >&6; } + SET_MAKE= +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } + SET_MAKE="MAKE=${MAKE-make}" +fi + +rm -rf .tst 2>/dev/null +mkdir .tst 2>/dev/null +if test -d .tst; then + am__leading_dot=. +else + am__leading_dot=_ +fi +rmdir .tst 2>/dev/null + +# Check whether --enable-silent-rules was given. +if test "${enable_silent_rules+set}" = set; then : + enableval=$enable_silent_rules; +fi + +case $enable_silent_rules in # ((( + yes) AM_DEFAULT_VERBOSITY=0;; + no) AM_DEFAULT_VERBOSITY=1;; + *) AM_DEFAULT_VERBOSITY=1;; +esac +am_make=${MAKE-make} +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $am_make supports nested variables" >&5 +$as_echo_n "checking whether $am_make supports nested variables... " >&6; } +if ${am_cv_make_support_nested_variables+:} false; then : + $as_echo_n "(cached) " >&6 +else + if $as_echo 'TRUE=$(BAR$(V)) +BAR0=false +BAR1=true +V=1 +am__doit: + @$(TRUE) +.PHONY: am__doit' | $am_make -f - >/dev/null 2>&1; then + am_cv_make_support_nested_variables=yes +else + am_cv_make_support_nested_variables=no +fi +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $am_cv_make_support_nested_variables" >&5 +$as_echo "$am_cv_make_support_nested_variables" >&6; } +if test $am_cv_make_support_nested_variables = yes; then + AM_V='$(V)' + AM_DEFAULT_V='$(AM_DEFAULT_VERBOSITY)' +else + AM_V=$AM_DEFAULT_VERBOSITY + AM_DEFAULT_V=$AM_DEFAULT_VERBOSITY +fi +AM_BACKSLASH='\' + +if test "`cd $srcdir && pwd`" != "`pwd`"; then + # Use -I$(srcdir) only when $(srcdir) != ., so that make's output + # is not polluted with repeated "-I." + am__isrc=' -I$(srcdir)' + # test to see if srcdir already configured + if test -f $srcdir/config.status; then + as_fn_error $? "source directory already configured; run \"make distclean\" there first" "$LINENO" 5 + fi +fi + +# test whether we have cygpath +if test -z "$CYGPATH_W"; then + if (cygpath --version) >/dev/null 2>/dev/null; then + CYGPATH_W='cygpath -w' + else + CYGPATH_W=echo + fi +fi + + +# Define the identity of the package. + PACKAGE='libpng' + VERSION='1.6.37' + + +cat >>confdefs.h <<_ACEOF +#define PACKAGE "$PACKAGE" +_ACEOF + + +cat >>confdefs.h <<_ACEOF +#define VERSION "$VERSION" +_ACEOF + +# Some tools Automake needs. + +ACLOCAL=${ACLOCAL-"${am_missing_run}aclocal-${am__api_version}"} + + +AUTOCONF=${AUTOCONF-"${am_missing_run}autoconf"} + + +AUTOMAKE=${AUTOMAKE-"${am_missing_run}automake-${am__api_version}"} + + +AUTOHEADER=${AUTOHEADER-"${am_missing_run}autoheader"} + + +MAKEINFO=${MAKEINFO-"${am_missing_run}makeinfo"} + +# For better backward compatibility. To be removed once Automake 1.9.x +# dies out for good. For more background, see: +# +# +mkdir_p='$(MKDIR_P)' + +# We need awk for the "check" target (and possibly the TAP driver). The +# system "awk" is bad on some platforms. +# Always define AMTAR for backward compatibility. Yes, it's still used +# in the wild :-( We should find a proper way to deprecate it ... +AMTAR='$${TAR-tar}' + + +# We'll loop over all known methods to create a tar archive until one works. +_am_tools='gnutar pax cpio none' + +am__tar='$${TAR-tar} chof - "$$tardir"' am__untar='$${TAR-tar} xf -' + + + + + + +# POSIX will say in a future version that running "rm -f" with no argument +# is OK; and we want to be able to make that assumption in our Makefile +# recipes. So use an aggressive probe to check that the usage we want is +# actually supported "in the wild" to an acceptable degree. +# See automake bug#10828. +# To make any issue more visible, cause the running configure to be aborted +# by default if the 'rm' program in use doesn't match our expectations; the +# user can still override this though. +if rm -f && rm -fr && rm -rf; then : OK; else + cat >&2 <<'END' +Oops! + +Your 'rm' program seems unable to run without file operands specified +on the command line, even when the '-f' option is present. This is contrary +to the behaviour of most rm programs out there, and not conforming with +the upcoming POSIX standard: + +Please tell bug-automake@gnu.org about your system, including the value +of your $PATH and any error possibly output before this message. This +can help us improve future automake versions. + +END + if test x"$ACCEPT_INFERIOR_RM_PROGRAM" = x"yes"; then + echo 'Configuration will proceed anyway, since you have set the' >&2 + echo 'ACCEPT_INFERIOR_RM_PROGRAM variable to "yes"' >&2 + echo >&2 + else + cat >&2 <<'END' +Aborting the configuration process, to ensure you take notice of the issue. + +You can download and install GNU coreutils to get an 'rm' implementation +that behaves properly: . + +If you want to complete the configuration process using your problematic +'rm' anyway, export the environment variable ACCEPT_INFERIOR_RM_PROGRAM +to "yes", and re-run configure. + +END + as_fn_error $? "Your 'rm' program is bad, sorry." "$LINENO" 5 + fi +fi + +# The following line causes --disable-maintainer-mode to be the default to +# configure. This is necessary because libpng distributions cannot rely on the +# time stamps of the autotools generated files being correct + +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to enable maintainer-specific portions of Makefiles" >&5 +$as_echo_n "checking whether to enable maintainer-specific portions of Makefiles... " >&6; } + # Check whether --enable-maintainer-mode was given. +if test "${enable_maintainer_mode+set}" = set; then : + enableval=$enable_maintainer_mode; USE_MAINTAINER_MODE=$enableval +else + USE_MAINTAINER_MODE=no +fi + + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $USE_MAINTAINER_MODE" >&5 +$as_echo "$USE_MAINTAINER_MODE" >&6; } + if test $USE_MAINTAINER_MODE = yes; then + MAINTAINER_MODE_TRUE= + MAINTAINER_MODE_FALSE='#' +else + MAINTAINER_MODE_TRUE='#' + MAINTAINER_MODE_FALSE= +fi + + MAINT=$MAINTAINER_MODE_TRUE + + + + +PNGLIB_VERSION=1.6.37 +PNGLIB_MAJOR=1 +PNGLIB_MINOR=6 +PNGLIB_RELEASE=37 + + + +ac_config_headers="$ac_config_headers config.h" + + +# Checks for programs. +ac_ext=c +ac_cpp='$CPP $CPPFLAGS' +ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5' +ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5' +ac_compiler_gnu=$ac_cv_c_compiler_gnu + +ac_ext=c +ac_cpp='$CPP $CPPFLAGS' +ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5' +ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5' +ac_compiler_gnu=$ac_cv_c_compiler_gnu +if test -n "$ac_tool_prefix"; then + # Extract the first word of "${ac_tool_prefix}gcc", so it can be a program name with args. +set dummy ${ac_tool_prefix}gcc; ac_word=$2 +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 +$as_echo_n "checking for $ac_word... " >&6; } +if ${ac_cv_prog_CC+:} false; then : + $as_echo_n "(cached) " >&6 +else + if test -n "$CC"; then + ac_cv_prog_CC="$CC" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then + ac_cv_prog_CC="${ac_tool_prefix}gcc" + $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done + done +IFS=$as_save_IFS + +fi +fi +CC=$ac_cv_prog_CC +if test -n "$CC"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CC" >&5 +$as_echo "$CC" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + +fi +if test -z "$ac_cv_prog_CC"; then + ac_ct_CC=$CC + # Extract the first word of "gcc", so it can be a program name with args. +set dummy gcc; ac_word=$2 +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 +$as_echo_n "checking for $ac_word... " >&6; } +if ${ac_cv_prog_ac_ct_CC+:} false; then : + $as_echo_n "(cached) " >&6 +else + if test -n "$ac_ct_CC"; then + ac_cv_prog_ac_ct_CC="$ac_ct_CC" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then + ac_cv_prog_ac_ct_CC="gcc" + $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done + done +IFS=$as_save_IFS + +fi +fi +ac_ct_CC=$ac_cv_prog_ac_ct_CC +if test -n "$ac_ct_CC"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_CC" >&5 +$as_echo "$ac_ct_CC" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + if test "x$ac_ct_CC" = x; then + CC="" + else + case $cross_compiling:$ac_tool_warned in +yes:) +{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5 +$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;} +ac_tool_warned=yes ;; +esac + CC=$ac_ct_CC + fi +else + CC="$ac_cv_prog_CC" +fi + +if test -z "$CC"; then + if test -n "$ac_tool_prefix"; then + # Extract the first word of "${ac_tool_prefix}cc", so it can be a program name with args. +set dummy ${ac_tool_prefix}cc; ac_word=$2 +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 +$as_echo_n "checking for $ac_word... " >&6; } +if ${ac_cv_prog_CC+:} false; then : + $as_echo_n "(cached) " >&6 +else + if test -n "$CC"; then + ac_cv_prog_CC="$CC" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then + ac_cv_prog_CC="${ac_tool_prefix}cc" + $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done + done +IFS=$as_save_IFS + +fi +fi +CC=$ac_cv_prog_CC +if test -n "$CC"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CC" >&5 +$as_echo "$CC" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + + fi +fi +if test -z "$CC"; then + # Extract the first word of "cc", so it can be a program name with args. +set dummy cc; ac_word=$2 +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 +$as_echo_n "checking for $ac_word... " >&6; } +if ${ac_cv_prog_CC+:} false; then : + $as_echo_n "(cached) " >&6 +else + if test -n "$CC"; then + ac_cv_prog_CC="$CC" # Let the user override the test. +else + ac_prog_rejected=no +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then + if test "$as_dir/$ac_word$ac_exec_ext" = "/usr/ucb/cc"; then + ac_prog_rejected=yes + continue + fi + ac_cv_prog_CC="cc" + $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done + done +IFS=$as_save_IFS + +if test $ac_prog_rejected = yes; then + # We found a bogon in the path, so make sure we never use it. + set dummy $ac_cv_prog_CC + shift + if test $# != 0; then + # We chose a different compiler from the bogus one. + # However, it has the same basename, so the bogon will be chosen + # first if we set CC to just the basename; use the full file name. + shift + ac_cv_prog_CC="$as_dir/$ac_word${1+' '}$@" + fi +fi +fi +fi +CC=$ac_cv_prog_CC +if test -n "$CC"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CC" >&5 +$as_echo "$CC" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + +fi +if test -z "$CC"; then + if test -n "$ac_tool_prefix"; then + for ac_prog in cl.exe + do + # Extract the first word of "$ac_tool_prefix$ac_prog", so it can be a program name with args. +set dummy $ac_tool_prefix$ac_prog; ac_word=$2 +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 +$as_echo_n "checking for $ac_word... " >&6; } +if ${ac_cv_prog_CC+:} false; then : + $as_echo_n "(cached) " >&6 +else + if test -n "$CC"; then + ac_cv_prog_CC="$CC" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then + ac_cv_prog_CC="$ac_tool_prefix$ac_prog" + $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done + done +IFS=$as_save_IFS + +fi +fi +CC=$ac_cv_prog_CC +if test -n "$CC"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CC" >&5 +$as_echo "$CC" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + + test -n "$CC" && break + done +fi +if test -z "$CC"; then + ac_ct_CC=$CC + for ac_prog in cl.exe +do + # Extract the first word of "$ac_prog", so it can be a program name with args. +set dummy $ac_prog; ac_word=$2 +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 +$as_echo_n "checking for $ac_word... " >&6; } +if ${ac_cv_prog_ac_ct_CC+:} false; then : + $as_echo_n "(cached) " >&6 +else + if test -n "$ac_ct_CC"; then + ac_cv_prog_ac_ct_CC="$ac_ct_CC" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then + ac_cv_prog_ac_ct_CC="$ac_prog" + $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done + done +IFS=$as_save_IFS + +fi +fi +ac_ct_CC=$ac_cv_prog_ac_ct_CC +if test -n "$ac_ct_CC"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_CC" >&5 +$as_echo "$ac_ct_CC" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + + test -n "$ac_ct_CC" && break +done + + if test "x$ac_ct_CC" = x; then + CC="" + else + case $cross_compiling:$ac_tool_warned in +yes:) +{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5 +$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;} +ac_tool_warned=yes ;; +esac + CC=$ac_ct_CC + fi +fi + +fi + + +test -z "$CC" && { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5 +$as_echo "$as_me: error: in \`$ac_pwd':" >&2;} +as_fn_error $? "no acceptable C compiler found in \$PATH +See \`config.log' for more details" "$LINENO" 5; } + +# Provide some information about the compiler. +$as_echo "$as_me:${as_lineno-$LINENO}: checking for C compiler version" >&5 +set X $ac_compile +ac_compiler=$2 +for ac_option in --version -v -V -qversion; do + { { ac_try="$ac_compiler $ac_option >&5" +case "(($ac_try" in + *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;; + *) ac_try_echo=$ac_try;; +esac +eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\"" +$as_echo "$ac_try_echo"; } >&5 + (eval "$ac_compiler $ac_option >&5") 2>conftest.err + ac_status=$? + if test -s conftest.err; then + sed '10a\ +... rest of stderr output deleted ... + 10q' conftest.err >conftest.er1 + cat conftest.er1 >&5 + fi + rm -f conftest.er1 conftest.err + $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 + test $ac_status = 0; } +done + +cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ + +int +main () +{ + + ; + return 0; +} +_ACEOF +ac_clean_files_save=$ac_clean_files +ac_clean_files="$ac_clean_files a.out a.out.dSYM a.exe b.out" +# Try to create an executable without -o first, disregard a.out. +# It will help us diagnose broken compilers, and finding out an intuition +# of exeext. +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the C compiler works" >&5 +$as_echo_n "checking whether the C compiler works... " >&6; } +ac_link_default=`$as_echo "$ac_link" | sed 's/ -o *conftest[^ ]*//'` + +# The possible output files: +ac_files="a.out conftest.exe conftest a.exe a_out.exe b.out conftest.*" + +ac_rmfiles= +for ac_file in $ac_files +do + case $ac_file in + *.$ac_ext | *.xcoff | *.tds | *.d | *.pdb | *.xSYM | *.bb | *.bbg | *.map | *.inf | *.dSYM | *.o | *.obj ) ;; + * ) ac_rmfiles="$ac_rmfiles $ac_file";; + esac +done +rm -f $ac_rmfiles + +if { { ac_try="$ac_link_default" +case "(($ac_try" in + *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;; + *) ac_try_echo=$ac_try;; +esac +eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\"" +$as_echo "$ac_try_echo"; } >&5 + (eval "$ac_link_default") 2>&5 + ac_status=$? + $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 + test $ac_status = 0; }; then : + # Autoconf-2.13 could set the ac_cv_exeext variable to `no'. +# So ignore a value of `no', otherwise this would lead to `EXEEXT = no' +# in a Makefile. We should not override ac_cv_exeext if it was cached, +# so that the user can short-circuit this test for compilers unknown to +# Autoconf. +for ac_file in $ac_files '' +do + test -f "$ac_file" || continue + case $ac_file in + *.$ac_ext | *.xcoff | *.tds | *.d | *.pdb | *.xSYM | *.bb | *.bbg | *.map | *.inf | *.dSYM | *.o | *.obj ) + ;; + [ab].out ) + # We found the default executable, but exeext='' is most + # certainly right. + break;; + *.* ) + if test "${ac_cv_exeext+set}" = set && test "$ac_cv_exeext" != no; + then :; else + ac_cv_exeext=`expr "$ac_file" : '[^.]*\(\..*\)'` + fi + # We set ac_cv_exeext here because the later test for it is not + # safe: cross compilers may not add the suffix if given an `-o' + # argument, so we may need to know it at that point already. + # Even if this section looks crufty: it has the advantage of + # actually working. + break;; + * ) + break;; + esac +done +test "$ac_cv_exeext" = no && ac_cv_exeext= + +else + ac_file='' +fi +if test -z "$ac_file"; then : + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +$as_echo "$as_me: failed program was:" >&5 +sed 's/^/| /' conftest.$ac_ext >&5 + +{ { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5 +$as_echo "$as_me: error: in \`$ac_pwd':" >&2;} +as_fn_error 77 "C compiler cannot create executables +See \`config.log' for more details" "$LINENO" 5; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5 +$as_echo "yes" >&6; } +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for C compiler default output file name" >&5 +$as_echo_n "checking for C compiler default output file name... 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For instance with Cygwin, `ls conftest' will +# work properly (i.e., refer to `conftest.exe'), while it won't with +# `rm'. +for ac_file in conftest.exe conftest conftest.*; do + test -f "$ac_file" || continue + case $ac_file in + *.$ac_ext | *.xcoff | *.tds | *.d | *.pdb | *.xSYM | *.bb | *.bbg | *.map | *.inf | *.dSYM | *.o | *.obj ) ;; + *.* ) ac_cv_exeext=`expr "$ac_file" : '[^.]*\(\..*\)'` + break;; + * ) break;; + esac +done +else + { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5 +$as_echo "$as_me: error: in \`$ac_pwd':" >&2;} +as_fn_error $? "cannot compute suffix of executables: cannot compile and link +See \`config.log' for more details" "$LINENO" 5; } +fi +rm -f conftest conftest$ac_cv_exeext +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_exeext" >&5 +$as_echo "$ac_cv_exeext" >&6; } + +rm -f conftest.$ac_ext +EXEEXT=$ac_cv_exeext +ac_exeext=$EXEEXT +cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ +#include +int +main () +{ +FILE *f = fopen ("conftest.out", "w"); + return ferror (f) || fclose (f) != 0; + + ; + return 0; +} +_ACEOF +ac_clean_files="$ac_clean_files conftest.out" +# Check that the compiler produces executables we can run. If not, either +# the compiler is broken, or we cross compile. +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether we are cross compiling" >&5 +$as_echo_n "checking whether we are cross compiling... " >&6; } +if test "$cross_compiling" != yes; then + { { ac_try="$ac_link" +case "(($ac_try" in + *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;; + *) ac_try_echo=$ac_try;; +esac +eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\"" +$as_echo "$ac_try_echo"; } >&5 + (eval "$ac_link") 2>&5 + ac_status=$? + $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 + test $ac_status = 0; } + if { ac_try='./conftest$ac_cv_exeext' + { { case "(($ac_try" in + *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;; + *) ac_try_echo=$ac_try;; +esac +eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\"" +$as_echo "$ac_try_echo"; } >&5 + (eval "$ac_try") 2>&5 + ac_status=$? + $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 + test $ac_status = 0; }; }; then + cross_compiling=no + else + if test "$cross_compiling" = maybe; then + cross_compiling=yes + else + { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5 +$as_echo "$as_me: error: in \`$ac_pwd':" >&2;} +as_fn_error $? "cannot run C compiled programs. +If you meant to cross compile, use \`--host'. +See \`config.log' for more details" "$LINENO" 5; } + fi + fi +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $cross_compiling" >&5 +$as_echo "$cross_compiling" >&6; } + +rm -f conftest.$ac_ext conftest$ac_cv_exeext conftest.out +ac_clean_files=$ac_clean_files_save +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for suffix of object files" >&5 +$as_echo_n "checking for suffix of object files... " >&6; } +if ${ac_cv_objext+:} false; then : + $as_echo_n "(cached) " >&6 +else + cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ + +int +main () +{ + + ; + return 0; +} +_ACEOF +rm -f conftest.o conftest.obj +if { { ac_try="$ac_compile" +case "(($ac_try" in + *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;; + *) ac_try_echo=$ac_try;; +esac +eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\"" +$as_echo "$ac_try_echo"; } >&5 + (eval "$ac_compile") 2>&5 + ac_status=$? + $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 + test $ac_status = 0; }; then : + for ac_file in conftest.o conftest.obj conftest.*; do + test -f "$ac_file" || continue; + case $ac_file in + *.$ac_ext | *.xcoff | *.tds | *.d | *.pdb | *.xSYM | *.bb | *.bbg | *.map | *.inf | *.dSYM ) ;; + *) ac_cv_objext=`expr "$ac_file" : '.*\.\(.*\)'` + break;; + esac +done +else + $as_echo "$as_me: failed program was:" >&5 +sed 's/^/| /' conftest.$ac_ext >&5 + +{ { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5 +$as_echo "$as_me: error: in \`$ac_pwd':" >&2;} +as_fn_error $? "cannot compute suffix of object files: cannot compile +See \`config.log' for more details" "$LINENO" 5; } +fi +rm -f conftest.$ac_cv_objext conftest.$ac_ext +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_objext" >&5 +$as_echo "$ac_cv_objext" >&6; } +OBJEXT=$ac_cv_objext +ac_objext=$OBJEXT +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether we are using the GNU C compiler" >&5 +$as_echo_n "checking whether we are using the GNU C compiler... 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" >&6; } +if ${ac_cv_path_SED+:} false; then : + $as_echo_n "(cached) " >&6 +else + ac_script=s/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa/bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb/ + for ac_i in 1 2 3 4 5 6 7; do + ac_script="$ac_script$as_nl$ac_script" + done + echo "$ac_script" 2>/dev/null | sed 99q >conftest.sed + { ac_script=; unset ac_script;} + if test -z "$SED"; then + ac_path_SED_found=false + # Loop through the user's path and test for each of PROGNAME-LIST + as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_prog in sed gsed; do + for ac_exec_ext in '' $ac_executable_extensions; do + ac_path_SED="$as_dir/$ac_prog$ac_exec_ext" + as_fn_executable_p "$ac_path_SED" || continue +# Check for GNU ac_path_SED and select it if it is found. + # Check for GNU $ac_path_SED +case `"$ac_path_SED" --version 2>&1` in +*GNU*) + ac_cv_path_SED="$ac_path_SED" ac_path_SED_found=:;; +*) + ac_count=0 + $as_echo_n 0123456789 >"conftest.in" + while : + do + cat "conftest.in" "conftest.in" >"conftest.tmp" + mv "conftest.tmp" "conftest.in" + cp "conftest.in" "conftest.nl" + $as_echo '' >> "conftest.nl" + "$ac_path_SED" -f conftest.sed < "conftest.nl" >"conftest.out" 2>/dev/null || break + diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break + as_fn_arith $ac_count + 1 && ac_count=$as_val + if test $ac_count -gt ${ac_path_SED_max-0}; then + # Best one so far, save it but keep looking for a better one + ac_cv_path_SED="$ac_path_SED" + ac_path_SED_max=$ac_count + fi + # 10*(2^10) chars as input seems more than enough + test $ac_count -gt 10 && break + done + rm -f conftest.in conftest.tmp conftest.nl conftest.out;; +esac + + $ac_path_SED_found && break 3 + done + done + done +IFS=$as_save_IFS + if test -z "$ac_cv_path_SED"; then + as_fn_error $? "no acceptable sed could be found in \$PATH" "$LINENO" 5 + fi +else + ac_cv_path_SED=$SED +fi + +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_SED" >&5 +$as_echo "$ac_cv_path_SED" >&6; } + SED="$ac_cv_path_SED" + rm -f conftest.sed + +test -z "$SED" && SED=sed +Xsed="$SED -e 1s/^X//" + + + + + + + + + + + +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for grep that handles long lines and -e" >&5 +$as_echo_n "checking for grep that handles long lines and -e... " >&6; } +if ${ac_cv_path_GREP+:} false; then : + $as_echo_n "(cached) " >&6 +else + if test -z "$GREP"; then + ac_path_GREP_found=false + # Loop through the user's path and test for each of PROGNAME-LIST + as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_prog in grep ggrep; do + for ac_exec_ext in '' $ac_executable_extensions; do + ac_path_GREP="$as_dir/$ac_prog$ac_exec_ext" + as_fn_executable_p "$ac_path_GREP" || continue +# Check for GNU ac_path_GREP and select it if it is found. + # Check for GNU $ac_path_GREP +case `"$ac_path_GREP" --version 2>&1` in +*GNU*) + ac_cv_path_GREP="$ac_path_GREP" ac_path_GREP_found=:;; +*) + ac_count=0 + $as_echo_n 0123456789 >"conftest.in" + while : + do + cat "conftest.in" "conftest.in" >"conftest.tmp" + mv "conftest.tmp" "conftest.in" + cp "conftest.in" "conftest.nl" + $as_echo 'GREP' >> "conftest.nl" + "$ac_path_GREP" -e 'GREP$' -e '-(cannot match)-' < "conftest.nl" >"conftest.out" 2>/dev/null || break + diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break + as_fn_arith $ac_count + 1 && ac_count=$as_val + if test $ac_count -gt ${ac_path_GREP_max-0}; then + # Best one so far, save it but keep looking for a better one + ac_cv_path_GREP="$ac_path_GREP" + ac_path_GREP_max=$ac_count + fi + # 10*(2^10) chars as input seems more than enough + test $ac_count -gt 10 && break + done + rm -f conftest.in conftest.tmp conftest.nl conftest.out;; +esac + + $ac_path_GREP_found && break 3 + done + done + done +IFS=$as_save_IFS + if test -z "$ac_cv_path_GREP"; then + as_fn_error $? "no acceptable grep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" "$LINENO" 5 + fi +else + ac_cv_path_GREP=$GREP +fi + +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_GREP" >&5 +$as_echo "$ac_cv_path_GREP" >&6; } + GREP="$ac_cv_path_GREP" + + +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for egrep" >&5 +$as_echo_n "checking for egrep... " >&6; } +if ${ac_cv_path_EGREP+:} false; then : + $as_echo_n "(cached) " >&6 +else + if echo a | $GREP -E '(a|b)' >/dev/null 2>&1 + then ac_cv_path_EGREP="$GREP -E" + else + if test -z "$EGREP"; then + ac_path_EGREP_found=false + # Loop through the user's path and test for each of PROGNAME-LIST + as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_prog in egrep; do + for ac_exec_ext in '' $ac_executable_extensions; do + ac_path_EGREP="$as_dir/$ac_prog$ac_exec_ext" + as_fn_executable_p "$ac_path_EGREP" || continue +# Check for GNU ac_path_EGREP and select it if it is found. + # Check for GNU $ac_path_EGREP +case `"$ac_path_EGREP" --version 2>&1` in +*GNU*) + ac_cv_path_EGREP="$ac_path_EGREP" ac_path_EGREP_found=:;; +*) + ac_count=0 + $as_echo_n 0123456789 >"conftest.in" + while : + do + cat "conftest.in" "conftest.in" >"conftest.tmp" + mv "conftest.tmp" "conftest.in" + cp "conftest.in" "conftest.nl" + $as_echo 'EGREP' >> "conftest.nl" + "$ac_path_EGREP" 'EGREP$' < "conftest.nl" >"conftest.out" 2>/dev/null || break + diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break + as_fn_arith $ac_count + 1 && ac_count=$as_val + if test $ac_count -gt ${ac_path_EGREP_max-0}; then + # Best one so far, save it but keep looking for a better one + ac_cv_path_EGREP="$ac_path_EGREP" + ac_path_EGREP_max=$ac_count + fi + # 10*(2^10) chars as input seems more than enough + test $ac_count -gt 10 && break + done + rm -f conftest.in conftest.tmp conftest.nl conftest.out;; +esac + + $ac_path_EGREP_found && break 3 + done + done + done +IFS=$as_save_IFS + if test -z "$ac_cv_path_EGREP"; then + as_fn_error $? "no acceptable egrep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" "$LINENO" 5 + fi +else + ac_cv_path_EGREP=$EGREP +fi + + fi +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_EGREP" >&5 +$as_echo "$ac_cv_path_EGREP" >&6; } + EGREP="$ac_cv_path_EGREP" + + +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for fgrep" >&5 +$as_echo_n "checking for fgrep... " >&6; } +if ${ac_cv_path_FGREP+:} false; then : + $as_echo_n "(cached) " >&6 +else + if echo 'ab*c' | $GREP -F 'ab*c' >/dev/null 2>&1 + then ac_cv_path_FGREP="$GREP -F" + else + if test -z "$FGREP"; then + ac_path_FGREP_found=false + # Loop through the user's path and test for each of PROGNAME-LIST + as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_prog in fgrep; do + for ac_exec_ext in '' $ac_executable_extensions; do + ac_path_FGREP="$as_dir/$ac_prog$ac_exec_ext" + as_fn_executable_p "$ac_path_FGREP" || continue +# Check for GNU ac_path_FGREP and select it if it is found. + # Check for GNU $ac_path_FGREP +case `"$ac_path_FGREP" --version 2>&1` in +*GNU*) + ac_cv_path_FGREP="$ac_path_FGREP" ac_path_FGREP_found=:;; +*) + ac_count=0 + $as_echo_n 0123456789 >"conftest.in" + while : + do + cat "conftest.in" "conftest.in" >"conftest.tmp" + mv "conftest.tmp" "conftest.in" + cp "conftest.in" "conftest.nl" + $as_echo 'FGREP' >> "conftest.nl" + "$ac_path_FGREP" FGREP < "conftest.nl" >"conftest.out" 2>/dev/null || break + diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break + as_fn_arith $ac_count + 1 && ac_count=$as_val + if test $ac_count -gt ${ac_path_FGREP_max-0}; then + # Best one so far, save it but keep looking for a better one + ac_cv_path_FGREP="$ac_path_FGREP" + ac_path_FGREP_max=$ac_count + fi + # 10*(2^10) chars as input seems more than enough + test $ac_count -gt 10 && break + done + rm -f conftest.in conftest.tmp conftest.nl conftest.out;; +esac + + $ac_path_FGREP_found && break 3 + done + done + done +IFS=$as_save_IFS + if test -z "$ac_cv_path_FGREP"; then + as_fn_error $? "no acceptable fgrep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" "$LINENO" 5 + fi +else + ac_cv_path_FGREP=$FGREP +fi + + fi +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_FGREP" >&5 +$as_echo "$ac_cv_path_FGREP" >&6; } + FGREP="$ac_cv_path_FGREP" + + +test -z "$GREP" && GREP=grep + + + + + + + + + + + + + + + + + +ECHO='\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\' +ECHO=$ECHO$ECHO$ECHO$ECHO$ECHO +ECHO=$ECHO$ECHO$ECHO$ECHO$ECHO$ECHO + +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking how to print strings" >&5 +$as_echo_n "checking how to print strings... " >&6; } +# Test print first, because it will be a builtin if present. +if test "X`( print -r -- -n ) 2>/dev/null`" = X-n && \ + test "X`print -r -- $ECHO 2>/dev/null`" = "X$ECHO"; then + ECHO='print -r --' +elif test "X`printf %s $ECHO 2>/dev/null`" = "X$ECHO"; then + ECHO='printf %s\n' +else + # Use this function as a fallback that always works. + func_fallback_echo () + { + eval 'cat <<_LTECHO_EOF +$1 +_LTECHO_EOF' + } + ECHO='func_fallback_echo' +fi + +# func_echo_all arg... +# Invoke $ECHO with all args, space-separated. +func_echo_all () +{ + $ECHO "" +} + +case $ECHO in + printf*) { $as_echo "$as_me:${as_lineno-$LINENO}: result: printf" >&5 +$as_echo "printf" >&6; } ;; + print*) { $as_echo "$as_me:${as_lineno-$LINENO}: result: print -r" >&5 +$as_echo "print -r" >&6; } ;; + *) { $as_echo "$as_me:${as_lineno-$LINENO}: result: cat" >&5 +$as_echo "cat" >&6; } ;; +esac + + + + + + + + + + + + + + + + +# Check whether --with-gnu-ld was given. +if test "${with_gnu_ld+set}" = set; then : + withval=$with_gnu_ld; test no = "$withval" || with_gnu_ld=yes +else + with_gnu_ld=no +fi + +ac_prog=ld +if test yes = "$GCC"; then + # Check if gcc -print-prog-name=ld gives a path. + { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ld used by $CC" >&5 +$as_echo_n "checking for ld used by $CC... " >&6; } + case $host in + *-*-mingw*) + # gcc leaves a trailing carriage return, which upsets mingw + ac_prog=`($CC -print-prog-name=ld) 2>&5 | tr -d '\015'` ;; + *) + ac_prog=`($CC -print-prog-name=ld) 2>&5` ;; + esac + case $ac_prog in + # Accept absolute paths. + [\\/]* | ?:[\\/]*) + re_direlt='/[^/][^/]*/\.\./' + # Canonicalize the pathname of ld + ac_prog=`$ECHO "$ac_prog"| $SED 's%\\\\%/%g'` + while $ECHO "$ac_prog" | $GREP "$re_direlt" > /dev/null 2>&1; do + ac_prog=`$ECHO $ac_prog| $SED "s%$re_direlt%/%"` + done + test -z "$LD" && LD=$ac_prog + ;; + "") + # If it fails, then pretend we aren't using GCC. + ac_prog=ld + ;; + *) + # If it is relative, then search for the first ld in PATH. + with_gnu_ld=unknown + ;; + esac +elif test yes = "$with_gnu_ld"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: checking for GNU ld" >&5 +$as_echo_n "checking for GNU ld... " >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: checking for non-GNU ld" >&5 +$as_echo_n "checking for non-GNU ld... " >&6; } +fi +if ${lt_cv_path_LD+:} false; then : + $as_echo_n "(cached) " >&6 +else + if test -z "$LD"; then + lt_save_ifs=$IFS; IFS=$PATH_SEPARATOR + for ac_dir in $PATH; do + IFS=$lt_save_ifs + test -z "$ac_dir" && ac_dir=. + if test -f "$ac_dir/$ac_prog" || test -f "$ac_dir/$ac_prog$ac_exeext"; then + lt_cv_path_LD=$ac_dir/$ac_prog + # Check to see if the program is GNU ld. I'd rather use --version, + # but apparently some variants of GNU ld only accept -v. + # Break only if it was the GNU/non-GNU ld that we prefer. + case `"$lt_cv_path_LD" -v 2>&1 &5 +$as_echo "$LD" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi +test -z "$LD" && as_fn_error $? "no acceptable ld found in \$PATH" "$LINENO" 5 +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if the linker ($LD) is GNU ld" >&5 +$as_echo_n "checking if the linker ($LD) is GNU ld... " >&6; } +if ${lt_cv_prog_gnu_ld+:} false; then : + $as_echo_n "(cached) " >&6 +else + # I'd rather use --version here, but apparently some GNU lds only accept -v. +case `$LD -v 2>&1 &5 +$as_echo "$lt_cv_prog_gnu_ld" >&6; } +with_gnu_ld=$lt_cv_prog_gnu_ld + + + + + + + + + +ac_ext=c +ac_cpp='$CPP $CPPFLAGS' +ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5' +ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5' +ac_compiler_gnu=$ac_cv_c_compiler_gnu +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking how to run the C preprocessor" >&5 +$as_echo_n "checking how to run the C preprocessor... " >&6; } +# On Suns, sometimes $CPP names a directory. +if test -n "$CPP" && test -d "$CPP"; then + CPP= +fi +if test -z "$CPP"; then + if ${ac_cv_prog_CPP+:} false; then : + $as_echo_n "(cached) " >&6 +else + # Double quotes because CPP needs to be expanded + for CPP in "$CC -E" "$CC -E -traditional-cpp" "/lib/cpp" + do + ac_preproc_ok=false +for ac_c_preproc_warn_flag in '' yes +do + # Use a header file that comes with gcc, so configuring glibc + # with a fresh cross-compiler works. + # Prefer to if __STDC__ is defined, since + # exists even on freestanding compilers. + # On the NeXT, cc -E runs the code through the compiler's parser, + # not just through cpp. "Syntax error" is here to catch this case. + cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ +#ifdef __STDC__ +# include +#else +# include +#endif + Syntax error +_ACEOF +if ac_fn_c_try_cpp "$LINENO"; then : + +else + # Broken: fails on valid input. +continue +fi +rm -f conftest.err conftest.i conftest.$ac_ext + + # OK, works on sane cases. Now check whether nonexistent headers + # can be detected and how. + cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ +#include +_ACEOF +if ac_fn_c_try_cpp "$LINENO"; then : + # Broken: success on invalid input. +continue +else + # Passes both tests. +ac_preproc_ok=: +break +fi +rm -f conftest.err conftest.i conftest.$ac_ext + +done +# Because of `break', _AC_PREPROC_IFELSE's cleaning code was skipped. +rm -f conftest.i conftest.err conftest.$ac_ext +if $ac_preproc_ok; then : + break +fi + + done + ac_cv_prog_CPP=$CPP + +fi + CPP=$ac_cv_prog_CPP +else + ac_cv_prog_CPP=$CPP +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $CPP" >&5 +$as_echo "$CPP" >&6; } +ac_preproc_ok=false +for ac_c_preproc_warn_flag in '' yes +do + # Use a header file that comes with gcc, so configuring glibc + # with a fresh cross-compiler works. + # Prefer to if __STDC__ is defined, since + # exists even on freestanding compilers. + # On the NeXT, cc -E runs the code through the compiler's parser, + # not just through cpp. "Syntax error" is here to catch this case. + cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ +#ifdef __STDC__ +# include +#else +# include +#endif + Syntax error +_ACEOF +if ac_fn_c_try_cpp "$LINENO"; then : + +else + # Broken: fails on valid input. +continue +fi +rm -f conftest.err conftest.i conftest.$ac_ext + + # OK, works on sane cases. Now check whether nonexistent headers + # can be detected and how. + cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ +#include +_ACEOF +if ac_fn_c_try_cpp "$LINENO"; then : + # Broken: success on invalid input. +continue +else + # Passes both tests. +ac_preproc_ok=: +break +fi +rm -f conftest.err conftest.i conftest.$ac_ext + +done +# Because of `break', _AC_PREPROC_IFELSE's cleaning code was skipped. +rm -f conftest.i conftest.err conftest.$ac_ext +if $ac_preproc_ok; then : + +else + { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5 +$as_echo "$as_me: error: in \`$ac_pwd':" >&2;} +as_fn_error $? "C preprocessor \"$CPP\" fails sanity check +See \`config.log' for more details" "$LINENO" 5; } +fi + +ac_ext=c +ac_cpp='$CPP $CPPFLAGS' +ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5' +ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5' +ac_compiler_gnu=$ac_cv_c_compiler_gnu + +for ac_prog in gawk mawk nawk awk +do + # Extract the first word of "$ac_prog", so it can be a program name with args. +set dummy $ac_prog; ac_word=$2 +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 +$as_echo_n "checking for $ac_word... " >&6; } +if ${ac_cv_prog_AWK+:} false; then : + $as_echo_n "(cached) " >&6 +else + if test -n "$AWK"; then + ac_cv_prog_AWK="$AWK" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then + ac_cv_prog_AWK="$ac_prog" + $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done + done +IFS=$as_save_IFS + +fi +fi +AWK=$ac_cv_prog_AWK +if test -n "$AWK"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $AWK" >&5 +$as_echo "$AWK" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + + test -n "$AWK" && break +done + + +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether ln -s works" >&5 +$as_echo_n "checking whether ln -s works... " >&6; } +LN_S=$as_ln_s +if test "$LN_S" = "ln -s"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5 +$as_echo "yes" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no, using $LN_S" >&5 +$as_echo "no, using $LN_S" >&6; } +fi + +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether ${MAKE-make} sets \$(MAKE)" >&5 +$as_echo_n "checking whether ${MAKE-make} sets \$(MAKE)... " >&6; } +set x ${MAKE-make} +ac_make=`$as_echo "$2" | sed 's/+/p/g; s/[^a-zA-Z0-9_]/_/g'` +if eval \${ac_cv_prog_make_${ac_make}_set+:} false; then : + $as_echo_n "(cached) " >&6 +else + cat >conftest.make <<\_ACEOF +SHELL = /bin/sh +all: + @echo '@@@%%%=$(MAKE)=@@@%%%' +_ACEOF +# GNU make sometimes prints "make[1]: Entering ...", which would confuse us. +case `${MAKE-make} -f conftest.make 2>/dev/null` in + *@@@%%%=?*=@@@%%%*) + eval ac_cv_prog_make_${ac_make}_set=yes;; + *) + eval ac_cv_prog_make_${ac_make}_set=no;; +esac +rm -f conftest.make +fi +if eval test \$ac_cv_prog_make_${ac_make}_set = yes; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5 +$as_echo "yes" >&6; } + SET_MAKE= +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } + SET_MAKE="MAKE=${MAKE-make}" +fi + + +case `pwd` in + *\ * | *\ *) + { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Libtool does not cope well with whitespace in \`pwd\`" >&5 +$as_echo "$as_me: WARNING: Libtool does not cope well with whitespace in \`pwd\`" >&2;} ;; +esac + + + +macro_version='2.4.6' +macro_revision='2.4.6' + + + + + + + + + + + + + +ltmain=$ac_aux_dir/ltmain.sh + +# Backslashify metacharacters that are still active within +# double-quoted strings. +sed_quote_subst='s/\(["`$\\]\)/\\\1/g' + +# Same as above, but do not quote variable references. +double_quote_subst='s/\(["`\\]\)/\\\1/g' + +# Sed substitution to delay expansion of an escaped shell variable in a +# double_quote_subst'ed string. +delay_variable_subst='s/\\\\\\\\\\\$/\\\\\\$/g' + +# Sed substitution to delay expansion of an escaped single quote. +delay_single_quote_subst='s/'\''/'\'\\\\\\\'\''/g' + +# Sed substitution to avoid accidental globbing in evaled expressions +no_glob_subst='s/\*/\\\*/g' + +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for BSD- or MS-compatible name lister (nm)" >&5 +$as_echo_n "checking for BSD- or MS-compatible name lister (nm)... " >&6; } +if ${lt_cv_path_NM+:} false; then : + $as_echo_n "(cached) " >&6 +else + if test -n "$NM"; then + # Let the user override the test. + lt_cv_path_NM=$NM +else + lt_nm_to_check=${ac_tool_prefix}nm + if test -n "$ac_tool_prefix" && test "$build" = "$host"; then + lt_nm_to_check="$lt_nm_to_check nm" + fi + for lt_tmp_nm in $lt_nm_to_check; do + lt_save_ifs=$IFS; IFS=$PATH_SEPARATOR + for ac_dir in $PATH /usr/ccs/bin/elf /usr/ccs/bin /usr/ucb /bin; do + IFS=$lt_save_ifs + test -z "$ac_dir" && ac_dir=. + tmp_nm=$ac_dir/$lt_tmp_nm + if test -f "$tmp_nm" || test -f "$tmp_nm$ac_exeext"; then + # Check to see if the nm accepts a BSD-compat flag. + # Adding the 'sed 1q' prevents false positives on HP-UX, which says: + # nm: unknown option "B" ignored + # Tru64's nm complains that /dev/null is an invalid object file + # MSYS converts /dev/null to NUL, MinGW nm treats NUL as empty + case $build_os in + mingw*) lt_bad_file=conftest.nm/nofile ;; + *) lt_bad_file=/dev/null ;; + esac + case `"$tmp_nm" -B $lt_bad_file 2>&1 | sed '1q'` in + *$lt_bad_file* | *'Invalid file or object type'*) + lt_cv_path_NM="$tmp_nm -B" + break 2 + ;; + *) + case `"$tmp_nm" -p /dev/null 2>&1 | sed '1q'` in + */dev/null*) + lt_cv_path_NM="$tmp_nm -p" + break 2 + ;; + *) + lt_cv_path_NM=${lt_cv_path_NM="$tmp_nm"} # keep the first match, but + continue # so that we can try to find one that supports BSD flags + ;; + esac + ;; + esac + fi + done + IFS=$lt_save_ifs + done + : ${lt_cv_path_NM=no} +fi +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_path_NM" >&5 +$as_echo "$lt_cv_path_NM" >&6; } +if test no != "$lt_cv_path_NM"; then + NM=$lt_cv_path_NM +else + # Didn't find any BSD compatible name lister, look for dumpbin. + if test -n "$DUMPBIN"; then : + # Let the user override the test. + else + if test -n "$ac_tool_prefix"; then + for ac_prog in dumpbin "link -dump" + do + # Extract the first word of "$ac_tool_prefix$ac_prog", so it can be a program name with args. +set dummy $ac_tool_prefix$ac_prog; ac_word=$2 +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 +$as_echo_n "checking for $ac_word... " >&6; } +if ${ac_cv_prog_DUMPBIN+:} false; then : + $as_echo_n "(cached) " >&6 +else + if test -n "$DUMPBIN"; then + ac_cv_prog_DUMPBIN="$DUMPBIN" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then + ac_cv_prog_DUMPBIN="$ac_tool_prefix$ac_prog" + $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done + done +IFS=$as_save_IFS + +fi +fi +DUMPBIN=$ac_cv_prog_DUMPBIN +if test -n "$DUMPBIN"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $DUMPBIN" >&5 +$as_echo "$DUMPBIN" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + + test -n "$DUMPBIN" && break + done +fi +if test -z "$DUMPBIN"; then + ac_ct_DUMPBIN=$DUMPBIN + for ac_prog in dumpbin "link -dump" +do + # Extract the first word of "$ac_prog", so it can be a program name with args. +set dummy $ac_prog; ac_word=$2 +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 +$as_echo_n "checking for $ac_word... " >&6; } +if ${ac_cv_prog_ac_ct_DUMPBIN+:} false; then : + $as_echo_n "(cached) " >&6 +else + if test -n "$ac_ct_DUMPBIN"; then + ac_cv_prog_ac_ct_DUMPBIN="$ac_ct_DUMPBIN" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then + ac_cv_prog_ac_ct_DUMPBIN="$ac_prog" + $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done + done +IFS=$as_save_IFS + +fi +fi +ac_ct_DUMPBIN=$ac_cv_prog_ac_ct_DUMPBIN +if test -n "$ac_ct_DUMPBIN"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_DUMPBIN" >&5 +$as_echo "$ac_ct_DUMPBIN" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + + test -n "$ac_ct_DUMPBIN" && break +done + + if test "x$ac_ct_DUMPBIN" = x; then + DUMPBIN=":" + else + case $cross_compiling:$ac_tool_warned in +yes:) +{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5 +$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;} +ac_tool_warned=yes ;; +esac + DUMPBIN=$ac_ct_DUMPBIN + fi +fi + + case `$DUMPBIN -symbols -headers /dev/null 2>&1 | sed '1q'` in + *COFF*) + DUMPBIN="$DUMPBIN -symbols -headers" + ;; + *) + DUMPBIN=: + ;; + esac + fi + + if test : != "$DUMPBIN"; then + NM=$DUMPBIN + fi +fi +test -z "$NM" && NM=nm + + + + + + +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking the name lister ($NM) interface" >&5 +$as_echo_n "checking the name lister ($NM) interface... " >&6; } +if ${lt_cv_nm_interface+:} false; then : + $as_echo_n "(cached) " >&6 +else + lt_cv_nm_interface="BSD nm" + echo "int some_variable = 0;" > conftest.$ac_ext + (eval echo "\"\$as_me:$LINENO: $ac_compile\"" >&5) + (eval "$ac_compile" 2>conftest.err) + cat conftest.err >&5 + (eval echo "\"\$as_me:$LINENO: $NM \\\"conftest.$ac_objext\\\"\"" >&5) + (eval "$NM \"conftest.$ac_objext\"" 2>conftest.err > conftest.out) + cat conftest.err >&5 + (eval echo "\"\$as_me:$LINENO: output\"" >&5) + cat conftest.out >&5 + if $GREP 'External.*some_variable' conftest.out > /dev/null; then + lt_cv_nm_interface="MS dumpbin" + fi + rm -f conftest* +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_nm_interface" >&5 +$as_echo "$lt_cv_nm_interface" >&6; } + +# find the maximum length of command line arguments +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking the maximum length of command line arguments" >&5 +$as_echo_n "checking the maximum length of command line arguments... " >&6; } +if ${lt_cv_sys_max_cmd_len+:} false; then : + $as_echo_n "(cached) " >&6 +else + i=0 + teststring=ABCD + + case $build_os in + msdosdjgpp*) + # On DJGPP, this test can blow up pretty badly due to problems in libc + # (any single argument exceeding 2000 bytes causes a buffer overrun + # during glob expansion). Even if it were fixed, the result of this + # check would be larger than it should be. + lt_cv_sys_max_cmd_len=12288; # 12K is about right + ;; + + gnu*) + # Under GNU Hurd, this test is not required because there is + # no limit to the length of command line arguments. + # Libtool will interpret -1 as no limit whatsoever + lt_cv_sys_max_cmd_len=-1; + ;; + + cygwin* | mingw* | cegcc*) + # On Win9x/ME, this test blows up -- it succeeds, but takes + # about 5 minutes as the teststring grows exponentially. + # Worse, since 9x/ME are not pre-emptively multitasking, + # you end up with a "frozen" computer, even though with patience + # the test eventually succeeds (with a max line length of 256k). + # Instead, let's just punt: use the minimum linelength reported by + # all of the supported platforms: 8192 (on NT/2K/XP). + lt_cv_sys_max_cmd_len=8192; + ;; + + mint*) + # On MiNT this can take a long time and run out of memory. + lt_cv_sys_max_cmd_len=8192; + ;; + + amigaos*) + # On AmigaOS with pdksh, this test takes hours, literally. + # So we just punt and use a minimum line length of 8192. + lt_cv_sys_max_cmd_len=8192; + ;; + + bitrig* | darwin* | dragonfly* | freebsd* | netbsd* | openbsd*) + # This has been around since 386BSD, at least. Likely further. + if test -x /sbin/sysctl; then + lt_cv_sys_max_cmd_len=`/sbin/sysctl -n kern.argmax` + elif test -x /usr/sbin/sysctl; then + lt_cv_sys_max_cmd_len=`/usr/sbin/sysctl -n kern.argmax` + else + lt_cv_sys_max_cmd_len=65536 # usable default for all BSDs + fi + # And add a safety zone + lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \/ 4` + lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \* 3` + ;; + + interix*) + # We know the value 262144 and hardcode it with a safety zone (like BSD) + lt_cv_sys_max_cmd_len=196608 + ;; + + os2*) + # The test takes a long time on OS/2. + lt_cv_sys_max_cmd_len=8192 + ;; + + osf*) + # Dr. Hans Ekkehard Plesser reports seeing a kernel panic running configure + # due to this test when exec_disable_arg_limit is 1 on Tru64. It is not + # nice to cause kernel panics so lets avoid the loop below. + # First set a reasonable default. + lt_cv_sys_max_cmd_len=16384 + # + if test -x /sbin/sysconfig; then + case `/sbin/sysconfig -q proc exec_disable_arg_limit` in + *1*) lt_cv_sys_max_cmd_len=-1 ;; + esac + fi + ;; + sco3.2v5*) + lt_cv_sys_max_cmd_len=102400 + ;; + sysv5* | sco5v6* | sysv4.2uw2*) + kargmax=`grep ARG_MAX /etc/conf/cf.d/stune 2>/dev/null` + if test -n "$kargmax"; then + lt_cv_sys_max_cmd_len=`echo $kargmax | sed 's/.*[ ]//'` + else + lt_cv_sys_max_cmd_len=32768 + fi + ;; + *) + lt_cv_sys_max_cmd_len=`(getconf ARG_MAX) 2> /dev/null` + if test -n "$lt_cv_sys_max_cmd_len" && \ + test undefined != "$lt_cv_sys_max_cmd_len"; then + lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \/ 4` + lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \* 3` + else + # Make teststring a little bigger before we do anything with it. + # a 1K string should be a reasonable start. + for i in 1 2 3 4 5 6 7 8; do + teststring=$teststring$teststring + done + SHELL=${SHELL-${CONFIG_SHELL-/bin/sh}} + # If test is not a shell built-in, we'll probably end up computing a + # maximum length that is only half of the actual maximum length, but + # we can't tell. + while { test X`env echo "$teststring$teststring" 2>/dev/null` \ + = "X$teststring$teststring"; } >/dev/null 2>&1 && + test 17 != "$i" # 1/2 MB should be enough + do + i=`expr $i + 1` + teststring=$teststring$teststring + done + # Only check the string length outside the loop. + lt_cv_sys_max_cmd_len=`expr "X$teststring" : ".*" 2>&1` + teststring= + # Add a significant safety factor because C++ compilers can tack on + # massive amounts of additional arguments before passing them to the + # linker. It appears as though 1/2 is a usable value. + lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \/ 2` + fi + ;; + esac + +fi + +if test -n "$lt_cv_sys_max_cmd_len"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_sys_max_cmd_len" >&5 +$as_echo "$lt_cv_sys_max_cmd_len" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: none" >&5 +$as_echo "none" >&6; } +fi +max_cmd_len=$lt_cv_sys_max_cmd_len + + + + + + +: ${CP="cp -f"} +: ${MV="mv -f"} +: ${RM="rm -f"} + +if ( (MAIL=60; unset MAIL) || exit) >/dev/null 2>&1; then + lt_unset=unset +else + lt_unset=false +fi + + + + + +# test EBCDIC or ASCII +case `echo X|tr X '\101'` in + A) # ASCII based system + # \n is not interpreted correctly by Solaris 8 /usr/ucb/tr + lt_SP2NL='tr \040 \012' + lt_NL2SP='tr \015\012 \040\040' + ;; + *) # EBCDIC based system + lt_SP2NL='tr \100 \n' + lt_NL2SP='tr \r\n \100\100' + ;; +esac + + + + + + + + + +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking how to convert $build file names to $host format" >&5 +$as_echo_n "checking how to convert $build file names to $host format... " >&6; } +if ${lt_cv_to_host_file_cmd+:} false; then : + $as_echo_n "(cached) " >&6 +else + case $host in + *-*-mingw* ) + case $build in + *-*-mingw* ) # actually msys + lt_cv_to_host_file_cmd=func_convert_file_msys_to_w32 + ;; + *-*-cygwin* ) + lt_cv_to_host_file_cmd=func_convert_file_cygwin_to_w32 + ;; + * ) # otherwise, assume *nix + lt_cv_to_host_file_cmd=func_convert_file_nix_to_w32 + ;; + esac + ;; + *-*-cygwin* ) + case $build in + *-*-mingw* ) # actually msys + lt_cv_to_host_file_cmd=func_convert_file_msys_to_cygwin + ;; + *-*-cygwin* ) + lt_cv_to_host_file_cmd=func_convert_file_noop + ;; + * ) # otherwise, assume *nix + lt_cv_to_host_file_cmd=func_convert_file_nix_to_cygwin + ;; + esac + ;; + * ) # unhandled hosts (and "normal" native builds) + lt_cv_to_host_file_cmd=func_convert_file_noop + ;; +esac + +fi + +to_host_file_cmd=$lt_cv_to_host_file_cmd +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_to_host_file_cmd" >&5 +$as_echo "$lt_cv_to_host_file_cmd" >&6; } + + + + + +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking how to convert $build file names to toolchain format" >&5 +$as_echo_n "checking how to convert $build file names to toolchain format... " >&6; } +if ${lt_cv_to_tool_file_cmd+:} false; then : + $as_echo_n "(cached) " >&6 +else + #assume ordinary cross tools, or native build. +lt_cv_to_tool_file_cmd=func_convert_file_noop +case $host in + *-*-mingw* ) + case $build in + *-*-mingw* ) # actually msys + lt_cv_to_tool_file_cmd=func_convert_file_msys_to_w32 + ;; + esac + ;; +esac + +fi + +to_tool_file_cmd=$lt_cv_to_tool_file_cmd +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_to_tool_file_cmd" >&5 +$as_echo "$lt_cv_to_tool_file_cmd" >&6; } + + + + + +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $LD option to reload object files" >&5 +$as_echo_n "checking for $LD option to reload object files... " >&6; } +if ${lt_cv_ld_reload_flag+:} false; then : + $as_echo_n "(cached) " >&6 +else + lt_cv_ld_reload_flag='-r' +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_ld_reload_flag" >&5 +$as_echo "$lt_cv_ld_reload_flag" >&6; } +reload_flag=$lt_cv_ld_reload_flag +case $reload_flag in +"" | " "*) ;; +*) reload_flag=" $reload_flag" ;; +esac +reload_cmds='$LD$reload_flag -o $output$reload_objs' +case $host_os in + cygwin* | mingw* | pw32* | cegcc*) + if test yes != "$GCC"; then + reload_cmds=false + fi + ;; + darwin*) + if test yes = "$GCC"; then + reload_cmds='$LTCC $LTCFLAGS -nostdlib $wl-r -o $output$reload_objs' + else + reload_cmds='$LD$reload_flag -o $output$reload_objs' + fi + ;; +esac + + + + + + + + + +if test -n "$ac_tool_prefix"; then + # Extract the first word of "${ac_tool_prefix}objdump", so it can be a program name with args. +set dummy ${ac_tool_prefix}objdump; ac_word=$2 +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 +$as_echo_n "checking for $ac_word... " >&6; } +if ${ac_cv_prog_OBJDUMP+:} false; then : + $as_echo_n "(cached) " >&6 +else + if test -n "$OBJDUMP"; then + ac_cv_prog_OBJDUMP="$OBJDUMP" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then + ac_cv_prog_OBJDUMP="${ac_tool_prefix}objdump" + $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done + done +IFS=$as_save_IFS + +fi +fi +OBJDUMP=$ac_cv_prog_OBJDUMP +if test -n "$OBJDUMP"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $OBJDUMP" >&5 +$as_echo "$OBJDUMP" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + +fi +if test -z "$ac_cv_prog_OBJDUMP"; then + ac_ct_OBJDUMP=$OBJDUMP + # Extract the first word of "objdump", so it can be a program name with args. +set dummy objdump; ac_word=$2 +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 +$as_echo_n "checking for $ac_word... " >&6; } +if ${ac_cv_prog_ac_ct_OBJDUMP+:} false; then : + $as_echo_n "(cached) " >&6 +else + if test -n "$ac_ct_OBJDUMP"; then + ac_cv_prog_ac_ct_OBJDUMP="$ac_ct_OBJDUMP" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then + ac_cv_prog_ac_ct_OBJDUMP="objdump" + $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done + done +IFS=$as_save_IFS + +fi +fi +ac_ct_OBJDUMP=$ac_cv_prog_ac_ct_OBJDUMP +if test -n "$ac_ct_OBJDUMP"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_OBJDUMP" >&5 +$as_echo "$ac_ct_OBJDUMP" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + if test "x$ac_ct_OBJDUMP" = x; then + OBJDUMP="false" + else + case $cross_compiling:$ac_tool_warned in +yes:) +{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5 +$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;} +ac_tool_warned=yes ;; +esac + OBJDUMP=$ac_ct_OBJDUMP + fi +else + OBJDUMP="$ac_cv_prog_OBJDUMP" +fi + +test -z "$OBJDUMP" && OBJDUMP=objdump + + + + + + +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking how to recognize dependent libraries" >&5 +$as_echo_n "checking how to recognize dependent libraries... " >&6; } +if ${lt_cv_deplibs_check_method+:} false; then : + $as_echo_n "(cached) " >&6 +else + lt_cv_file_magic_cmd='$MAGIC_CMD' +lt_cv_file_magic_test_file= +lt_cv_deplibs_check_method='unknown' +# Need to set the preceding variable on all platforms that support +# interlibrary dependencies. +# 'none' -- dependencies not supported. +# 'unknown' -- same as none, but documents that we really don't know. +# 'pass_all' -- all dependencies passed with no checks. +# 'test_compile' -- check by making test program. +# 'file_magic [[regex]]' -- check by looking for files in library path +# that responds to the $file_magic_cmd with a given extended regex. +# If you have 'file' or equivalent on your system and you're not sure +# whether 'pass_all' will *always* work, you probably want this one. + +case $host_os in +aix[4-9]*) + lt_cv_deplibs_check_method=pass_all + ;; + +beos*) + lt_cv_deplibs_check_method=pass_all + ;; + +bsdi[45]*) + lt_cv_deplibs_check_method='file_magic ELF [0-9][0-9]*-bit [ML]SB (shared object|dynamic lib)' + lt_cv_file_magic_cmd='/usr/bin/file -L' + lt_cv_file_magic_test_file=/shlib/libc.so + ;; + +cygwin*) + # func_win32_libid is a shell function defined in ltmain.sh + lt_cv_deplibs_check_method='file_magic ^x86 archive import|^x86 DLL' + lt_cv_file_magic_cmd='func_win32_libid' + ;; + +mingw* | pw32*) + # Base MSYS/MinGW do not provide the 'file' command needed by + # func_win32_libid shell function, so use a weaker test based on 'objdump', + # unless we find 'file', for example because we are cross-compiling. + if ( file / ) >/dev/null 2>&1; then + lt_cv_deplibs_check_method='file_magic ^x86 archive import|^x86 DLL' + lt_cv_file_magic_cmd='func_win32_libid' + else + # Keep this pattern in sync with the one in func_win32_libid. + lt_cv_deplibs_check_method='file_magic file format (pei*-i386(.*architecture: i386)?|pe-arm-wince|pe-x86-64)' + lt_cv_file_magic_cmd='$OBJDUMP -f' + fi + ;; + +cegcc*) + # use the weaker test based on 'objdump'. See mingw*. + lt_cv_deplibs_check_method='file_magic file format pe-arm-.*little(.*architecture: arm)?' + lt_cv_file_magic_cmd='$OBJDUMP -f' + ;; + +darwin* | rhapsody*) + lt_cv_deplibs_check_method=pass_all + ;; + +freebsd* | dragonfly*) + if echo __ELF__ | $CC -E - | $GREP __ELF__ > /dev/null; then + case $host_cpu in + i*86 ) + # Not sure whether the presence of OpenBSD here was a mistake. + # Let's accept both of them until this is cleared up. + lt_cv_deplibs_check_method='file_magic (FreeBSD|OpenBSD|DragonFly)/i[3-9]86 (compact )?demand paged shared library' + lt_cv_file_magic_cmd=/usr/bin/file + lt_cv_file_magic_test_file=`echo /usr/lib/libc.so.*` + ;; + esac + else + lt_cv_deplibs_check_method=pass_all + fi + ;; + +haiku*) + lt_cv_deplibs_check_method=pass_all + ;; + +hpux10.20* | hpux11*) + lt_cv_file_magic_cmd=/usr/bin/file + case $host_cpu in + ia64*) + lt_cv_deplibs_check_method='file_magic (s[0-9][0-9][0-9]|ELF-[0-9][0-9]) shared object file - IA64' + lt_cv_file_magic_test_file=/usr/lib/hpux32/libc.so + ;; + hppa*64*) + lt_cv_deplibs_check_method='file_magic (s[0-9][0-9][0-9]|ELF[ -][0-9][0-9])(-bit)?( [LM]SB)? shared object( file)?[, -]* PA-RISC [0-9]\.[0-9]' + lt_cv_file_magic_test_file=/usr/lib/pa20_64/libc.sl + ;; + *) + lt_cv_deplibs_check_method='file_magic (s[0-9][0-9][0-9]|PA-RISC[0-9]\.[0-9]) shared library' + lt_cv_file_magic_test_file=/usr/lib/libc.sl + ;; + esac + ;; + +interix[3-9]*) + # PIC code is broken on Interix 3.x, that's why |\.a not |_pic\.a here + lt_cv_deplibs_check_method='match_pattern /lib[^/]+(\.so|\.a)$' + ;; + +irix5* | irix6* | nonstopux*) + case $LD in + *-32|*"-32 ") libmagic=32-bit;; + *-n32|*"-n32 ") libmagic=N32;; + *-64|*"-64 ") libmagic=64-bit;; + *) libmagic=never-match;; + esac + lt_cv_deplibs_check_method=pass_all + ;; + +# This must be glibc/ELF. +linux* | k*bsd*-gnu | kopensolaris*-gnu | gnu*) + lt_cv_deplibs_check_method=pass_all + ;; + +netbsd*) + if echo __ELF__ | $CC -E - | $GREP __ELF__ > /dev/null; then + lt_cv_deplibs_check_method='match_pattern /lib[^/]+(\.so\.[0-9]+\.[0-9]+|_pic\.a)$' + else + lt_cv_deplibs_check_method='match_pattern /lib[^/]+(\.so|_pic\.a)$' + fi + ;; + +newos6*) + lt_cv_deplibs_check_method='file_magic ELF [0-9][0-9]*-bit [ML]SB (executable|dynamic lib)' + lt_cv_file_magic_cmd=/usr/bin/file + lt_cv_file_magic_test_file=/usr/lib/libnls.so + ;; + +*nto* | *qnx*) + lt_cv_deplibs_check_method=pass_all + ;; + +openbsd* | bitrig*) + if test -z "`echo __ELF__ | $CC -E - | $GREP __ELF__`"; then + lt_cv_deplibs_check_method='match_pattern /lib[^/]+(\.so\.[0-9]+\.[0-9]+|\.so|_pic\.a)$' + else + lt_cv_deplibs_check_method='match_pattern /lib[^/]+(\.so\.[0-9]+\.[0-9]+|_pic\.a)$' + fi + ;; + +osf3* | osf4* | osf5*) + lt_cv_deplibs_check_method=pass_all + ;; + +rdos*) + lt_cv_deplibs_check_method=pass_all + ;; + +solaris*) + lt_cv_deplibs_check_method=pass_all + ;; + +sysv5* | sco3.2v5* | sco5v6* | unixware* | OpenUNIX* | sysv4*uw2*) + lt_cv_deplibs_check_method=pass_all + ;; + +sysv4 | sysv4.3*) + case $host_vendor in + motorola) + lt_cv_deplibs_check_method='file_magic ELF [0-9][0-9]*-bit [ML]SB (shared object|dynamic lib) M[0-9][0-9]* Version [0-9]' + lt_cv_file_magic_test_file=`echo /usr/lib/libc.so*` + ;; + ncr) + lt_cv_deplibs_check_method=pass_all + ;; + sequent) + lt_cv_file_magic_cmd='/bin/file' + lt_cv_deplibs_check_method='file_magic ELF [0-9][0-9]*-bit [LM]SB (shared object|dynamic lib )' + ;; + sni) + lt_cv_file_magic_cmd='/bin/file' + lt_cv_deplibs_check_method="file_magic ELF [0-9][0-9]*-bit [LM]SB dynamic lib" + lt_cv_file_magic_test_file=/lib/libc.so + ;; + siemens) + lt_cv_deplibs_check_method=pass_all + ;; + pc) + lt_cv_deplibs_check_method=pass_all + ;; + esac + ;; + +tpf*) + lt_cv_deplibs_check_method=pass_all + ;; +os2*) + lt_cv_deplibs_check_method=pass_all + ;; +esac + +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_deplibs_check_method" >&5 +$as_echo "$lt_cv_deplibs_check_method" >&6; } + +file_magic_glob= +want_nocaseglob=no +if test "$build" = "$host"; then + case $host_os in + mingw* | pw32*) + if ( shopt | grep nocaseglob ) >/dev/null 2>&1; then + want_nocaseglob=yes + else + file_magic_glob=`echo aAbBcCdDeEfFgGhHiIjJkKlLmMnNoOpPqQrRsStTuUvVwWxXyYzZ | $SED -e "s/\(..\)/s\/[\1]\/[\1]\/g;/g"` + fi + ;; + esac +fi + +file_magic_cmd=$lt_cv_file_magic_cmd +deplibs_check_method=$lt_cv_deplibs_check_method +test -z "$deplibs_check_method" && deplibs_check_method=unknown + + + + + + + + + + + + + + + + + + + + + + +if test -n "$ac_tool_prefix"; then + # Extract the first word of "${ac_tool_prefix}dlltool", so it can be a program name with args. +set dummy ${ac_tool_prefix}dlltool; ac_word=$2 +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 +$as_echo_n "checking for $ac_word... " >&6; } +if ${ac_cv_prog_DLLTOOL+:} false; then : + $as_echo_n "(cached) " >&6 +else + if test -n "$DLLTOOL"; then + ac_cv_prog_DLLTOOL="$DLLTOOL" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then + ac_cv_prog_DLLTOOL="${ac_tool_prefix}dlltool" + $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done + done +IFS=$as_save_IFS + +fi +fi +DLLTOOL=$ac_cv_prog_DLLTOOL +if test -n "$DLLTOOL"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $DLLTOOL" >&5 +$as_echo "$DLLTOOL" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + +fi +if test -z "$ac_cv_prog_DLLTOOL"; then + ac_ct_DLLTOOL=$DLLTOOL + # Extract the first word of "dlltool", so it can be a program name with args. +set dummy dlltool; ac_word=$2 +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 +$as_echo_n "checking for $ac_word... " >&6; } +if ${ac_cv_prog_ac_ct_DLLTOOL+:} false; then : + $as_echo_n "(cached) " >&6 +else + if test -n "$ac_ct_DLLTOOL"; then + ac_cv_prog_ac_ct_DLLTOOL="$ac_ct_DLLTOOL" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then + ac_cv_prog_ac_ct_DLLTOOL="dlltool" + $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done + done +IFS=$as_save_IFS + +fi +fi +ac_ct_DLLTOOL=$ac_cv_prog_ac_ct_DLLTOOL +if test -n "$ac_ct_DLLTOOL"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_DLLTOOL" >&5 +$as_echo "$ac_ct_DLLTOOL" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + if test "x$ac_ct_DLLTOOL" = x; then + DLLTOOL="false" + else + case $cross_compiling:$ac_tool_warned in +yes:) +{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5 +$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;} +ac_tool_warned=yes ;; +esac + DLLTOOL=$ac_ct_DLLTOOL + fi +else + DLLTOOL="$ac_cv_prog_DLLTOOL" +fi + +test -z "$DLLTOOL" && DLLTOOL=dlltool + + + + + + + +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking how to associate runtime and link libraries" >&5 +$as_echo_n "checking how to associate runtime and link libraries... " >&6; } +if ${lt_cv_sharedlib_from_linklib_cmd+:} false; then : + $as_echo_n "(cached) " >&6 +else + lt_cv_sharedlib_from_linklib_cmd='unknown' + +case $host_os in +cygwin* | mingw* | pw32* | cegcc*) + # two different shell functions defined in ltmain.sh; + # decide which one to use based on capabilities of $DLLTOOL + case `$DLLTOOL --help 2>&1` in + *--identify-strict*) + lt_cv_sharedlib_from_linklib_cmd=func_cygming_dll_for_implib + ;; + *) + lt_cv_sharedlib_from_linklib_cmd=func_cygming_dll_for_implib_fallback + ;; + esac + ;; +*) + # fallback: assume linklib IS sharedlib + lt_cv_sharedlib_from_linklib_cmd=$ECHO + ;; +esac + +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_sharedlib_from_linklib_cmd" >&5 +$as_echo "$lt_cv_sharedlib_from_linklib_cmd" >&6; } +sharedlib_from_linklib_cmd=$lt_cv_sharedlib_from_linklib_cmd +test -z "$sharedlib_from_linklib_cmd" && sharedlib_from_linklib_cmd=$ECHO + + + + + + + + +if test -n "$ac_tool_prefix"; then + for ac_prog in ar + do + # Extract the first word of "$ac_tool_prefix$ac_prog", so it can be a program name with args. +set dummy $ac_tool_prefix$ac_prog; ac_word=$2 +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 +$as_echo_n "checking for $ac_word... " >&6; } +if ${ac_cv_prog_AR+:} false; then : + $as_echo_n "(cached) " >&6 +else + if test -n "$AR"; then + ac_cv_prog_AR="$AR" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then + ac_cv_prog_AR="$ac_tool_prefix$ac_prog" + $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done + done +IFS=$as_save_IFS + +fi +fi +AR=$ac_cv_prog_AR +if test -n "$AR"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $AR" >&5 +$as_echo "$AR" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + + test -n "$AR" && break + done +fi +if test -z "$AR"; then + ac_ct_AR=$AR + for ac_prog in ar +do + # Extract the first word of "$ac_prog", so it can be a program name with args. +set dummy $ac_prog; ac_word=$2 +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 +$as_echo_n "checking for $ac_word... " >&6; } +if ${ac_cv_prog_ac_ct_AR+:} false; then : + $as_echo_n "(cached) " >&6 +else + if test -n "$ac_ct_AR"; then + ac_cv_prog_ac_ct_AR="$ac_ct_AR" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then + ac_cv_prog_ac_ct_AR="$ac_prog" + $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done + done +IFS=$as_save_IFS + +fi +fi +ac_ct_AR=$ac_cv_prog_ac_ct_AR +if test -n "$ac_ct_AR"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_AR" >&5 +$as_echo "$ac_ct_AR" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + + test -n "$ac_ct_AR" && break +done + + if test "x$ac_ct_AR" = x; then + AR="false" + else + case $cross_compiling:$ac_tool_warned in +yes:) +{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5 +$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;} +ac_tool_warned=yes ;; +esac + AR=$ac_ct_AR + fi +fi + +: ${AR=ar} +: ${AR_FLAGS=cru} + + + + + + + + + + + +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for archiver @FILE support" >&5 +$as_echo_n "checking for archiver @FILE support... " >&6; } +if ${lt_cv_ar_at_file+:} false; then : + $as_echo_n "(cached) " >&6 +else + lt_cv_ar_at_file=no + cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ + +int +main () +{ + + ; + return 0; +} +_ACEOF +if ac_fn_c_try_compile "$LINENO"; then : + echo conftest.$ac_objext > conftest.lst + lt_ar_try='$AR $AR_FLAGS libconftest.a @conftest.lst >&5' + { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$lt_ar_try\""; } >&5 + (eval $lt_ar_try) 2>&5 + ac_status=$? + $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 + test $ac_status = 0; } + if test 0 -eq "$ac_status"; then + # Ensure the archiver fails upon bogus file names. + rm -f conftest.$ac_objext libconftest.a + { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$lt_ar_try\""; } >&5 + (eval $lt_ar_try) 2>&5 + ac_status=$? + $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 + test $ac_status = 0; } + if test 0 -ne "$ac_status"; then + lt_cv_ar_at_file=@ + fi + fi + rm -f conftest.* libconftest.a + +fi +rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext + +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_ar_at_file" >&5 +$as_echo "$lt_cv_ar_at_file" >&6; } + +if test no = "$lt_cv_ar_at_file"; then + archiver_list_spec= +else + archiver_list_spec=$lt_cv_ar_at_file +fi + + + + + + + +if test -n "$ac_tool_prefix"; then + # Extract the first word of "${ac_tool_prefix}strip", so it can be a program name with args. +set dummy ${ac_tool_prefix}strip; ac_word=$2 +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 +$as_echo_n "checking for $ac_word... " >&6; } +if ${ac_cv_prog_STRIP+:} false; then : + $as_echo_n "(cached) " >&6 +else + if test -n "$STRIP"; then + ac_cv_prog_STRIP="$STRIP" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then + ac_cv_prog_STRIP="${ac_tool_prefix}strip" + $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done + done +IFS=$as_save_IFS + +fi +fi +STRIP=$ac_cv_prog_STRIP +if test -n "$STRIP"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $STRIP" >&5 +$as_echo "$STRIP" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + +fi +if test -z "$ac_cv_prog_STRIP"; then + ac_ct_STRIP=$STRIP + # Extract the first word of "strip", so it can be a program name with args. +set dummy strip; ac_word=$2 +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 +$as_echo_n "checking for $ac_word... " >&6; } +if ${ac_cv_prog_ac_ct_STRIP+:} false; then : + $as_echo_n "(cached) " >&6 +else + if test -n "$ac_ct_STRIP"; then + ac_cv_prog_ac_ct_STRIP="$ac_ct_STRIP" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then + ac_cv_prog_ac_ct_STRIP="strip" + $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done + done +IFS=$as_save_IFS + +fi +fi +ac_ct_STRIP=$ac_cv_prog_ac_ct_STRIP +if test -n "$ac_ct_STRIP"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_STRIP" >&5 +$as_echo "$ac_ct_STRIP" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + if test "x$ac_ct_STRIP" = x; then + STRIP=":" + else + case $cross_compiling:$ac_tool_warned in +yes:) +{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5 +$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;} +ac_tool_warned=yes ;; +esac + STRIP=$ac_ct_STRIP + fi +else + STRIP="$ac_cv_prog_STRIP" +fi + +test -z "$STRIP" && STRIP=: + + + + + + +if test -n "$ac_tool_prefix"; then + # Extract the first word of "${ac_tool_prefix}ranlib", so it can be a program name with args. +set dummy ${ac_tool_prefix}ranlib; ac_word=$2 +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 +$as_echo_n "checking for $ac_word... " >&6; } +if ${ac_cv_prog_RANLIB+:} false; then : + $as_echo_n "(cached) " >&6 +else + if test -n "$RANLIB"; then + ac_cv_prog_RANLIB="$RANLIB" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then + ac_cv_prog_RANLIB="${ac_tool_prefix}ranlib" + $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done + done +IFS=$as_save_IFS + +fi +fi +RANLIB=$ac_cv_prog_RANLIB +if test -n "$RANLIB"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $RANLIB" >&5 +$as_echo "$RANLIB" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + +fi +if test -z "$ac_cv_prog_RANLIB"; then + ac_ct_RANLIB=$RANLIB + # Extract the first word of "ranlib", so it can be a program name with args. +set dummy ranlib; ac_word=$2 +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 +$as_echo_n "checking for $ac_word... " >&6; } +if ${ac_cv_prog_ac_ct_RANLIB+:} false; then : + $as_echo_n "(cached) " >&6 +else + if test -n "$ac_ct_RANLIB"; then + ac_cv_prog_ac_ct_RANLIB="$ac_ct_RANLIB" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then + ac_cv_prog_ac_ct_RANLIB="ranlib" + $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done + done +IFS=$as_save_IFS + +fi +fi +ac_ct_RANLIB=$ac_cv_prog_ac_ct_RANLIB +if test -n "$ac_ct_RANLIB"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_RANLIB" >&5 +$as_echo "$ac_ct_RANLIB" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + if test "x$ac_ct_RANLIB" = x; then + RANLIB=":" + else + case $cross_compiling:$ac_tool_warned in +yes:) +{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5 +$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;} +ac_tool_warned=yes ;; +esac + RANLIB=$ac_ct_RANLIB + fi +else + RANLIB="$ac_cv_prog_RANLIB" +fi + +test -z "$RANLIB" && RANLIB=: + + + + + + +# Determine commands to create old-style static archives. +old_archive_cmds='$AR $AR_FLAGS $oldlib$oldobjs' +old_postinstall_cmds='chmod 644 $oldlib' +old_postuninstall_cmds= + +if test -n "$RANLIB"; then + case $host_os in + bitrig* | openbsd*) + old_postinstall_cmds="$old_postinstall_cmds~\$RANLIB -t \$tool_oldlib" + ;; + *) + old_postinstall_cmds="$old_postinstall_cmds~\$RANLIB \$tool_oldlib" + ;; + esac + old_archive_cmds="$old_archive_cmds~\$RANLIB \$tool_oldlib" +fi + +case $host_os in + darwin*) + lock_old_archive_extraction=yes ;; + *) + lock_old_archive_extraction=no ;; +esac + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +# If no C compiler was specified, use CC. +LTCC=${LTCC-"$CC"} + +# If no C compiler flags were specified, use CFLAGS. +LTCFLAGS=${LTCFLAGS-"$CFLAGS"} + +# Allow CC to be a program name with arguments. +compiler=$CC + + +# Check for command to grab the raw symbol name followed by C symbol from nm. +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking command to parse $NM output from $compiler object" >&5 +$as_echo_n "checking command to parse $NM output from $compiler object... " >&6; } +if ${lt_cv_sys_global_symbol_pipe+:} false; then : + $as_echo_n "(cached) " >&6 +else + +# These are sane defaults that work on at least a few old systems. +# [They come from Ultrix. What could be older than Ultrix?!! ;)] + +# Character class describing NM global symbol codes. +symcode='[BCDEGRST]' + +# Regexp to match symbols that can be accessed directly from C. +sympat='\([_A-Za-z][_A-Za-z0-9]*\)' + +# Define system-specific variables. +case $host_os in +aix*) + symcode='[BCDT]' + ;; +cygwin* | mingw* | pw32* | cegcc*) + symcode='[ABCDGISTW]' + ;; +hpux*) + if test ia64 = "$host_cpu"; then + symcode='[ABCDEGRST]' + fi + ;; +irix* | nonstopux*) + symcode='[BCDEGRST]' + ;; +osf*) + symcode='[BCDEGQRST]' + ;; +solaris*) + symcode='[BDRT]' + ;; +sco3.2v5*) + symcode='[DT]' + ;; +sysv4.2uw2*) + symcode='[DT]' + ;; +sysv5* | sco5v6* | unixware* | OpenUNIX*) + symcode='[ABDT]' + ;; +sysv4) + symcode='[DFNSTU]' + ;; +esac + +# If we're using GNU nm, then use its standard symbol codes. +case `$NM -V 2>&1` in +*GNU* | *'with BFD'*) + symcode='[ABCDGIRSTW]' ;; +esac + +if test "$lt_cv_nm_interface" = "MS dumpbin"; then + # Gets list of data symbols to import. + lt_cv_sys_global_symbol_to_import="sed -n -e 's/^I .* \(.*\)$/\1/p'" + # Adjust the below global symbol transforms to fixup imported variables. + lt_cdecl_hook=" -e 's/^I .* \(.*\)$/extern __declspec(dllimport) char \1;/p'" + lt_c_name_hook=" -e 's/^I .* \(.*\)$/ {\"\1\", (void *) 0},/p'" + lt_c_name_lib_hook="\ + -e 's/^I .* \(lib.*\)$/ {\"\1\", (void *) 0},/p'\ + -e 's/^I .* \(.*\)$/ {\"lib\1\", (void *) 0},/p'" +else + # Disable hooks by default. + lt_cv_sys_global_symbol_to_import= + lt_cdecl_hook= + lt_c_name_hook= + lt_c_name_lib_hook= +fi + +# Transform an extracted symbol line into a proper C declaration. +# Some systems (esp. on ia64) link data and code symbols differently, +# so use this general approach. +lt_cv_sys_global_symbol_to_cdecl="sed -n"\ +$lt_cdecl_hook\ +" -e 's/^T .* \(.*\)$/extern int \1();/p'"\ +" -e 's/^$symcode$symcode* .* \(.*\)$/extern char \1;/p'" + +# Transform an extracted symbol line into symbol name and symbol address +lt_cv_sys_global_symbol_to_c_name_address="sed -n"\ +$lt_c_name_hook\ +" -e 's/^: \(.*\) .*$/ {\"\1\", (void *) 0},/p'"\ +" -e 's/^$symcode$symcode* .* \(.*\)$/ {\"\1\", (void *) \&\1},/p'" + +# Transform an extracted symbol line into symbol name with lib prefix and +# symbol address. +lt_cv_sys_global_symbol_to_c_name_address_lib_prefix="sed -n"\ +$lt_c_name_lib_hook\ +" -e 's/^: \(.*\) .*$/ {\"\1\", (void *) 0},/p'"\ +" -e 's/^$symcode$symcode* .* \(lib.*\)$/ {\"\1\", (void *) \&\1},/p'"\ +" -e 's/^$symcode$symcode* .* \(.*\)$/ {\"lib\1\", (void *) \&\1},/p'" + +# Handle CRLF in mingw tool chain +opt_cr= +case $build_os in +mingw*) + opt_cr=`$ECHO 'x\{0,1\}' | tr x '\015'` # option cr in regexp + ;; +esac + +# Try without a prefix underscore, then with it. +for ac_symprfx in "" "_"; do + + # Transform symcode, sympat, and symprfx into a raw symbol and a C symbol. + symxfrm="\\1 $ac_symprfx\\2 \\2" + + # Write the raw and C identifiers. + if test "$lt_cv_nm_interface" = "MS dumpbin"; then + # Fake it for dumpbin and say T for any non-static function, + # D for any global variable and I for any imported variable. + # Also find C++ and __fastcall symbols from MSVC++, + # which start with @ or ?. + lt_cv_sys_global_symbol_pipe="$AWK '"\ +" {last_section=section; section=\$ 3};"\ +" /^COFF SYMBOL TABLE/{for(i in hide) delete hide[i]};"\ +" /Section length .*#relocs.*(pick any)/{hide[last_section]=1};"\ +" /^ *Symbol name *: /{split(\$ 0,sn,\":\"); si=substr(sn[2],2)};"\ +" /^ *Type *: code/{print \"T\",si,substr(si,length(prfx))};"\ +" /^ *Type *: data/{print \"I\",si,substr(si,length(prfx))};"\ +" \$ 0!~/External *\|/{next};"\ +" / 0+ UNDEF /{next}; / UNDEF \([^|]\)*()/{next};"\ +" {if(hide[section]) next};"\ +" {f=\"D\"}; \$ 0~/\(\).*\|/{f=\"T\"};"\ +" {split(\$ 0,a,/\||\r/); split(a[2],s)};"\ +" s[1]~/^[@?]/{print f,s[1],s[1]; next};"\ +" s[1]~prfx {split(s[1],t,\"@\"); print f,t[1],substr(t[1],length(prfx))}"\ +" ' prfx=^$ac_symprfx" + else + lt_cv_sys_global_symbol_pipe="sed -n -e 's/^.*[ ]\($symcode$symcode*\)[ ][ ]*$ac_symprfx$sympat$opt_cr$/$symxfrm/p'" + fi + lt_cv_sys_global_symbol_pipe="$lt_cv_sys_global_symbol_pipe | sed '/ __gnu_lto/d'" + + # Check to see that the pipe works correctly. + pipe_works=no + + rm -f conftest* + cat > conftest.$ac_ext <<_LT_EOF +#ifdef __cplusplus +extern "C" { +#endif +char nm_test_var; +void nm_test_func(void); +void nm_test_func(void){} +#ifdef __cplusplus +} +#endif +int main(){nm_test_var='a';nm_test_func();return(0);} +_LT_EOF + + if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5 + (eval $ac_compile) 2>&5 + ac_status=$? + $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 + test $ac_status = 0; }; then + # Now try to grab the symbols. + nlist=conftest.nm + if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$NM conftest.$ac_objext \| "$lt_cv_sys_global_symbol_pipe" \> $nlist\""; } >&5 + (eval $NM conftest.$ac_objext \| "$lt_cv_sys_global_symbol_pipe" \> $nlist) 2>&5 + ac_status=$? + $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 + test $ac_status = 0; } && test -s "$nlist"; then + # Try sorting and uniquifying the output. + if sort "$nlist" | uniq > "$nlist"T; then + mv -f "$nlist"T "$nlist" + else + rm -f "$nlist"T + fi + + # Make sure that we snagged all the symbols we need. + if $GREP ' nm_test_var$' "$nlist" >/dev/null; then + if $GREP ' nm_test_func$' "$nlist" >/dev/null; then + cat <<_LT_EOF > conftest.$ac_ext +/* Keep this code in sync between libtool.m4, ltmain, lt_system.h, and tests. */ +#if defined _WIN32 || defined __CYGWIN__ || defined _WIN32_WCE +/* DATA imports from DLLs on WIN32 can't be const, because runtime + relocations are performed -- see ld's documentation on pseudo-relocs. */ +# define LT_DLSYM_CONST +#elif defined __osf__ +/* This system does not cope well with relocations in const data. */ +# define LT_DLSYM_CONST +#else +# define LT_DLSYM_CONST const +#endif + +#ifdef __cplusplus +extern "C" { +#endif + +_LT_EOF + # Now generate the symbol file. + eval "$lt_cv_sys_global_symbol_to_cdecl"' < "$nlist" | $GREP -v main >> conftest.$ac_ext' + + cat <<_LT_EOF >> conftest.$ac_ext + +/* The mapping between symbol names and symbols. */ +LT_DLSYM_CONST struct { + const char *name; + void *address; +} +lt__PROGRAM__LTX_preloaded_symbols[] = +{ + { "@PROGRAM@", (void *) 0 }, +_LT_EOF + $SED "s/^$symcode$symcode* .* \(.*\)$/ {\"\1\", (void *) \&\1},/" < "$nlist" | $GREP -v main >> conftest.$ac_ext + cat <<\_LT_EOF >> conftest.$ac_ext + {0, (void *) 0} +}; + +/* This works around a problem in FreeBSD linker */ +#ifdef FREEBSD_WORKAROUND +static const void *lt_preloaded_setup() { + return lt__PROGRAM__LTX_preloaded_symbols; +} +#endif + +#ifdef __cplusplus +} +#endif +_LT_EOF + # Now try linking the two files. + mv conftest.$ac_objext conftstm.$ac_objext + lt_globsym_save_LIBS=$LIBS + lt_globsym_save_CFLAGS=$CFLAGS + LIBS=conftstm.$ac_objext + CFLAGS="$CFLAGS$lt_prog_compiler_no_builtin_flag" + if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5 + (eval $ac_link) 2>&5 + ac_status=$? + $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 + test $ac_status = 0; } && test -s conftest$ac_exeext; then + pipe_works=yes + fi + LIBS=$lt_globsym_save_LIBS + CFLAGS=$lt_globsym_save_CFLAGS + else + echo "cannot find nm_test_func in $nlist" >&5 + fi + else + echo "cannot find nm_test_var in $nlist" >&5 + fi + else + echo "cannot run $lt_cv_sys_global_symbol_pipe" >&5 + fi + else + echo "$progname: failed program was:" >&5 + cat conftest.$ac_ext >&5 + fi + rm -rf conftest* conftst* + + # Do not use the global_symbol_pipe unless it works. + if test yes = "$pipe_works"; then + break + else + lt_cv_sys_global_symbol_pipe= + fi +done + +fi + +if test -z "$lt_cv_sys_global_symbol_pipe"; then + lt_cv_sys_global_symbol_to_cdecl= +fi +if test -z "$lt_cv_sys_global_symbol_pipe$lt_cv_sys_global_symbol_to_cdecl"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: failed" >&5 +$as_echo "failed" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: ok" >&5 +$as_echo "ok" >&6; } +fi + +# Response file support. +if test "$lt_cv_nm_interface" = "MS dumpbin"; then + nm_file_list_spec='@' +elif $NM --help 2>/dev/null | grep '[@]FILE' >/dev/null; then + nm_file_list_spec='@' +fi + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for sysroot" >&5 +$as_echo_n "checking for sysroot... " >&6; } + +# Check whether --with-sysroot was given. +if test "${with_sysroot+set}" = set; then : + withval=$with_sysroot; +else + with_sysroot=no +fi + + +lt_sysroot= +case $with_sysroot in #( + yes) + if test yes = "$GCC"; then + lt_sysroot=`$CC --print-sysroot 2>/dev/null` + fi + ;; #( + /*) + lt_sysroot=`echo "$with_sysroot" | sed -e "$sed_quote_subst"` + ;; #( + no|'') + ;; #( + *) + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $with_sysroot" >&5 +$as_echo "$with_sysroot" >&6; } + as_fn_error $? "The sysroot must be an absolute path." "$LINENO" 5 + ;; +esac + + { $as_echo "$as_me:${as_lineno-$LINENO}: result: ${lt_sysroot:-no}" >&5 +$as_echo "${lt_sysroot:-no}" >&6; } + + + + + +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for a working dd" >&5 +$as_echo_n "checking for a working dd... " >&6; } +if ${ac_cv_path_lt_DD+:} false; then : + $as_echo_n "(cached) " >&6 +else + printf 0123456789abcdef0123456789abcdef >conftest.i +cat conftest.i conftest.i >conftest2.i +: ${lt_DD:=$DD} +if test -z "$lt_DD"; then + ac_path_lt_DD_found=false + # Loop through the user's path and test for each of PROGNAME-LIST + as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_prog in dd; do + for ac_exec_ext in '' $ac_executable_extensions; do + ac_path_lt_DD="$as_dir/$ac_prog$ac_exec_ext" + as_fn_executable_p "$ac_path_lt_DD" || continue +if "$ac_path_lt_DD" bs=32 count=1 conftest.out 2>/dev/null; then + cmp -s conftest.i conftest.out \ + && ac_cv_path_lt_DD="$ac_path_lt_DD" ac_path_lt_DD_found=: +fi + $ac_path_lt_DD_found && break 3 + done + done + done +IFS=$as_save_IFS + if test -z "$ac_cv_path_lt_DD"; then + : + fi +else + ac_cv_path_lt_DD=$lt_DD +fi + +rm -f conftest.i conftest2.i conftest.out +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_lt_DD" >&5 +$as_echo "$ac_cv_path_lt_DD" >&6; } + + +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking how to truncate binary pipes" >&5 +$as_echo_n "checking how to truncate binary pipes... " >&6; } +if ${lt_cv_truncate_bin+:} false; then : + $as_echo_n "(cached) " >&6 +else + printf 0123456789abcdef0123456789abcdef >conftest.i +cat conftest.i conftest.i >conftest2.i +lt_cv_truncate_bin= +if "$ac_cv_path_lt_DD" bs=32 count=1 conftest.out 2>/dev/null; then + cmp -s conftest.i conftest.out \ + && lt_cv_truncate_bin="$ac_cv_path_lt_DD bs=4096 count=1" +fi +rm -f conftest.i conftest2.i conftest.out +test -z "$lt_cv_truncate_bin" && lt_cv_truncate_bin="$SED -e 4q" +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_truncate_bin" >&5 +$as_echo "$lt_cv_truncate_bin" >&6; } + + + + + + + +# Calculate cc_basename. Skip known compiler wrappers and cross-prefix. +func_cc_basename () +{ + for cc_temp in $*""; do + case $cc_temp in + compile | *[\\/]compile | ccache | *[\\/]ccache ) ;; + distcc | *[\\/]distcc | purify | *[\\/]purify ) ;; + \-*) ;; + *) break;; + esac + done + func_cc_basename_result=`$ECHO "$cc_temp" | $SED "s%.*/%%; s%^$host_alias-%%"` +} + +# Check whether --enable-libtool-lock was given. +if test "${enable_libtool_lock+set}" = set; then : + enableval=$enable_libtool_lock; +fi + +test no = "$enable_libtool_lock" || enable_libtool_lock=yes + +# Some flags need to be propagated to the compiler or linker for good +# libtool support. +case $host in +ia64-*-hpux*) + # Find out what ABI is being produced by ac_compile, and set mode + # options accordingly. + echo 'int i;' > conftest.$ac_ext + if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5 + (eval $ac_compile) 2>&5 + ac_status=$? + $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 + test $ac_status = 0; }; then + case `/usr/bin/file conftest.$ac_objext` in + *ELF-32*) + HPUX_IA64_MODE=32 + ;; + *ELF-64*) + HPUX_IA64_MODE=64 + ;; + esac + fi + rm -rf conftest* + ;; +*-*-irix6*) + # Find out what ABI is being produced by ac_compile, and set linker + # options accordingly. + echo '#line '$LINENO' "configure"' > conftest.$ac_ext + if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5 + (eval $ac_compile) 2>&5 + ac_status=$? + $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 + test $ac_status = 0; }; then + if test yes = "$lt_cv_prog_gnu_ld"; then + case `/usr/bin/file conftest.$ac_objext` in + *32-bit*) + LD="${LD-ld} -melf32bsmip" + ;; + *N32*) + LD="${LD-ld} -melf32bmipn32" + ;; + *64-bit*) + LD="${LD-ld} -melf64bmip" + ;; + esac + else + case `/usr/bin/file conftest.$ac_objext` in + *32-bit*) + LD="${LD-ld} -32" + ;; + *N32*) + LD="${LD-ld} -n32" + ;; + *64-bit*) + LD="${LD-ld} -64" + ;; + esac + fi + fi + rm -rf conftest* + ;; + +mips64*-*linux*) + # Find out what ABI is being produced by ac_compile, and set linker + # options accordingly. + echo '#line '$LINENO' "configure"' > conftest.$ac_ext + if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5 + (eval $ac_compile) 2>&5 + ac_status=$? + $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 + test $ac_status = 0; }; then + emul=elf + case `/usr/bin/file conftest.$ac_objext` in + *32-bit*) + emul="${emul}32" + ;; + *64-bit*) + emul="${emul}64" + ;; + esac + case `/usr/bin/file conftest.$ac_objext` in + *MSB*) + emul="${emul}btsmip" + ;; + *LSB*) + emul="${emul}ltsmip" + ;; + esac + case `/usr/bin/file conftest.$ac_objext` in + *N32*) + emul="${emul}n32" + ;; + esac + LD="${LD-ld} -m $emul" + fi + rm -rf conftest* + ;; + +x86_64-*kfreebsd*-gnu|x86_64-*linux*|powerpc*-*linux*| \ +s390*-*linux*|s390*-*tpf*|sparc*-*linux*) + # Find out what ABI is being produced by ac_compile, and set linker + # options accordingly. Note that the listed cases only cover the + # situations where additional linker options are needed (such as when + # doing 32-bit compilation for a host where ld defaults to 64-bit, or + # vice versa); the common cases where no linker options are needed do + # not appear in the list. + echo 'int i;' > conftest.$ac_ext + if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5 + (eval $ac_compile) 2>&5 + ac_status=$? + $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 + test $ac_status = 0; }; then + case `/usr/bin/file conftest.o` in + *32-bit*) + case $host in + x86_64-*kfreebsd*-gnu) + LD="${LD-ld} -m elf_i386_fbsd" + ;; + x86_64-*linux*) + case `/usr/bin/file conftest.o` in + *x86-64*) + LD="${LD-ld} -m elf32_x86_64" + ;; + *) + LD="${LD-ld} -m elf_i386" + ;; + esac + ;; + powerpc64le-*linux*) + LD="${LD-ld} -m elf32lppclinux" + ;; + powerpc64-*linux*) + LD="${LD-ld} -m elf32ppclinux" + ;; + s390x-*linux*) + LD="${LD-ld} -m elf_s390" + ;; + sparc64-*linux*) + LD="${LD-ld} -m elf32_sparc" + ;; + esac + ;; + *64-bit*) + case $host in + x86_64-*kfreebsd*-gnu) + LD="${LD-ld} -m elf_x86_64_fbsd" + ;; + x86_64-*linux*) + LD="${LD-ld} -m elf_x86_64" + ;; + powerpcle-*linux*) + LD="${LD-ld} -m elf64lppc" + ;; + powerpc-*linux*) + LD="${LD-ld} -m elf64ppc" + ;; + s390*-*linux*|s390*-*tpf*) + LD="${LD-ld} -m elf64_s390" + ;; + sparc*-*linux*) + LD="${LD-ld} -m elf64_sparc" + ;; + esac + ;; + esac + fi + rm -rf conftest* + ;; + +*-*-sco3.2v5*) + # On SCO OpenServer 5, we need -belf to get full-featured binaries. + SAVE_CFLAGS=$CFLAGS + CFLAGS="$CFLAGS -belf" + { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the C compiler needs -belf" >&5 +$as_echo_n "checking whether the C compiler needs -belf... " >&6; } +if ${lt_cv_cc_needs_belf+:} false; then : + $as_echo_n "(cached) " >&6 +else + ac_ext=c +ac_cpp='$CPP $CPPFLAGS' +ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5' +ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5' +ac_compiler_gnu=$ac_cv_c_compiler_gnu + + cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ + +int +main () +{ + + ; + return 0; +} +_ACEOF +if ac_fn_c_try_link "$LINENO"; then : + lt_cv_cc_needs_belf=yes +else + lt_cv_cc_needs_belf=no +fi +rm -f core conftest.err conftest.$ac_objext \ + conftest$ac_exeext conftest.$ac_ext + ac_ext=c +ac_cpp='$CPP $CPPFLAGS' +ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5' +ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5' +ac_compiler_gnu=$ac_cv_c_compiler_gnu + +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_cc_needs_belf" >&5 +$as_echo "$lt_cv_cc_needs_belf" >&6; } + if test yes != "$lt_cv_cc_needs_belf"; then + # this is probably gcc 2.8.0, egcs 1.0 or newer; no need for -belf + CFLAGS=$SAVE_CFLAGS + fi + ;; +*-*solaris*) + # Find out what ABI is being produced by ac_compile, and set linker + # options accordingly. + echo 'int i;' > conftest.$ac_ext + if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5 + (eval $ac_compile) 2>&5 + ac_status=$? + $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 + test $ac_status = 0; }; then + case `/usr/bin/file conftest.o` in + *64-bit*) + case $lt_cv_prog_gnu_ld in + yes*) + case $host in + i?86-*-solaris*|x86_64-*-solaris*) + LD="${LD-ld} -m elf_x86_64" + ;; + sparc*-*-solaris*) + LD="${LD-ld} -m elf64_sparc" + ;; + esac + # GNU ld 2.21 introduced _sol2 emulations. Use them if available. + if ${LD-ld} -V | grep _sol2 >/dev/null 2>&1; then + LD=${LD-ld}_sol2 + fi + ;; + *) + if ${LD-ld} -64 -r -o conftest2.o conftest.o >/dev/null 2>&1; then + LD="${LD-ld} -64" + fi + ;; + esac + ;; + esac + fi + rm -rf conftest* + ;; +esac + +need_locks=$enable_libtool_lock + +if test -n "$ac_tool_prefix"; then + # Extract the first word of "${ac_tool_prefix}mt", so it can be a program name with args. +set dummy ${ac_tool_prefix}mt; ac_word=$2 +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 +$as_echo_n "checking for $ac_word... " >&6; } +if ${ac_cv_prog_MANIFEST_TOOL+:} false; then : + $as_echo_n "(cached) " >&6 +else + if test -n "$MANIFEST_TOOL"; then + ac_cv_prog_MANIFEST_TOOL="$MANIFEST_TOOL" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then + ac_cv_prog_MANIFEST_TOOL="${ac_tool_prefix}mt" + $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done + done +IFS=$as_save_IFS + +fi +fi +MANIFEST_TOOL=$ac_cv_prog_MANIFEST_TOOL +if test -n "$MANIFEST_TOOL"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $MANIFEST_TOOL" >&5 +$as_echo "$MANIFEST_TOOL" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + +fi +if test -z "$ac_cv_prog_MANIFEST_TOOL"; then + ac_ct_MANIFEST_TOOL=$MANIFEST_TOOL + # Extract the first word of "mt", so it can be a program name with args. +set dummy mt; ac_word=$2 +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 +$as_echo_n "checking for $ac_word... " >&6; } +if ${ac_cv_prog_ac_ct_MANIFEST_TOOL+:} false; then : + $as_echo_n "(cached) " >&6 +else + if test -n "$ac_ct_MANIFEST_TOOL"; then + ac_cv_prog_ac_ct_MANIFEST_TOOL="$ac_ct_MANIFEST_TOOL" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then + ac_cv_prog_ac_ct_MANIFEST_TOOL="mt" + $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done + done +IFS=$as_save_IFS + +fi +fi +ac_ct_MANIFEST_TOOL=$ac_cv_prog_ac_ct_MANIFEST_TOOL +if test -n "$ac_ct_MANIFEST_TOOL"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_MANIFEST_TOOL" >&5 +$as_echo "$ac_ct_MANIFEST_TOOL" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + if test "x$ac_ct_MANIFEST_TOOL" = x; then + MANIFEST_TOOL=":" + else + case $cross_compiling:$ac_tool_warned in +yes:) +{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5 +$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;} +ac_tool_warned=yes ;; +esac + MANIFEST_TOOL=$ac_ct_MANIFEST_TOOL + fi +else + MANIFEST_TOOL="$ac_cv_prog_MANIFEST_TOOL" +fi + +test -z "$MANIFEST_TOOL" && MANIFEST_TOOL=mt +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if $MANIFEST_TOOL is a manifest tool" >&5 +$as_echo_n "checking if $MANIFEST_TOOL is a manifest tool... " >&6; } +if ${lt_cv_path_mainfest_tool+:} false; then : + $as_echo_n "(cached) " >&6 +else + lt_cv_path_mainfest_tool=no + echo "$as_me:$LINENO: $MANIFEST_TOOL '-?'" >&5 + $MANIFEST_TOOL '-?' 2>conftest.err > conftest.out + cat conftest.err >&5 + if $GREP 'Manifest Tool' conftest.out > /dev/null; then + lt_cv_path_mainfest_tool=yes + fi + rm -f conftest* +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_path_mainfest_tool" >&5 +$as_echo "$lt_cv_path_mainfest_tool" >&6; } +if test yes != "$lt_cv_path_mainfest_tool"; then + MANIFEST_TOOL=: +fi + + + + + + + case $host_os in + rhapsody* | darwin*) + if test -n "$ac_tool_prefix"; then + # Extract the first word of "${ac_tool_prefix}dsymutil", so it can be a program name with args. +set dummy ${ac_tool_prefix}dsymutil; ac_word=$2 +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 +$as_echo_n "checking for $ac_word... " >&6; } +if ${ac_cv_prog_DSYMUTIL+:} false; then : + $as_echo_n "(cached) " >&6 +else + if test -n "$DSYMUTIL"; then + ac_cv_prog_DSYMUTIL="$DSYMUTIL" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then + ac_cv_prog_DSYMUTIL="${ac_tool_prefix}dsymutil" + $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done + done +IFS=$as_save_IFS + +fi +fi +DSYMUTIL=$ac_cv_prog_DSYMUTIL +if test -n "$DSYMUTIL"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $DSYMUTIL" >&5 +$as_echo "$DSYMUTIL" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + +fi +if test -z "$ac_cv_prog_DSYMUTIL"; then + ac_ct_DSYMUTIL=$DSYMUTIL + # Extract the first word of "dsymutil", so it can be a program name with args. +set dummy dsymutil; ac_word=$2 +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 +$as_echo_n "checking for $ac_word... " >&6; } +if ${ac_cv_prog_ac_ct_DSYMUTIL+:} false; then : + $as_echo_n "(cached) " >&6 +else + if test -n "$ac_ct_DSYMUTIL"; then + ac_cv_prog_ac_ct_DSYMUTIL="$ac_ct_DSYMUTIL" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then + ac_cv_prog_ac_ct_DSYMUTIL="dsymutil" + $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done + done +IFS=$as_save_IFS + +fi +fi +ac_ct_DSYMUTIL=$ac_cv_prog_ac_ct_DSYMUTIL +if test -n "$ac_ct_DSYMUTIL"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_DSYMUTIL" >&5 +$as_echo "$ac_ct_DSYMUTIL" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + if test "x$ac_ct_DSYMUTIL" = x; then + DSYMUTIL=":" + else + case $cross_compiling:$ac_tool_warned in +yes:) +{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5 +$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;} +ac_tool_warned=yes ;; +esac + DSYMUTIL=$ac_ct_DSYMUTIL + fi +else + DSYMUTIL="$ac_cv_prog_DSYMUTIL" +fi + + if test -n "$ac_tool_prefix"; then + # Extract the first word of "${ac_tool_prefix}nmedit", so it can be a program name with args. +set dummy ${ac_tool_prefix}nmedit; ac_word=$2 +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 +$as_echo_n "checking for $ac_word... " >&6; } +if ${ac_cv_prog_NMEDIT+:} false; then : + $as_echo_n "(cached) " >&6 +else + if test -n "$NMEDIT"; then + ac_cv_prog_NMEDIT="$NMEDIT" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then + ac_cv_prog_NMEDIT="${ac_tool_prefix}nmedit" + $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done + done +IFS=$as_save_IFS + +fi +fi +NMEDIT=$ac_cv_prog_NMEDIT +if test -n "$NMEDIT"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $NMEDIT" >&5 +$as_echo "$NMEDIT" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + +fi +if test -z "$ac_cv_prog_NMEDIT"; then + ac_ct_NMEDIT=$NMEDIT + # Extract the first word of "nmedit", so it can be a program name with args. +set dummy nmedit; ac_word=$2 +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 +$as_echo_n "checking for $ac_word... " >&6; } +if ${ac_cv_prog_ac_ct_NMEDIT+:} false; then : + $as_echo_n "(cached) " >&6 +else + if test -n "$ac_ct_NMEDIT"; then + ac_cv_prog_ac_ct_NMEDIT="$ac_ct_NMEDIT" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then + ac_cv_prog_ac_ct_NMEDIT="nmedit" + $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done + done +IFS=$as_save_IFS + +fi +fi +ac_ct_NMEDIT=$ac_cv_prog_ac_ct_NMEDIT +if test -n "$ac_ct_NMEDIT"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_NMEDIT" >&5 +$as_echo "$ac_ct_NMEDIT" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + if test "x$ac_ct_NMEDIT" = x; then + NMEDIT=":" + else + case $cross_compiling:$ac_tool_warned in +yes:) +{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5 +$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;} +ac_tool_warned=yes ;; +esac + NMEDIT=$ac_ct_NMEDIT + fi +else + NMEDIT="$ac_cv_prog_NMEDIT" +fi + + if test -n "$ac_tool_prefix"; then + # Extract the first word of "${ac_tool_prefix}lipo", so it can be a program name with args. +set dummy ${ac_tool_prefix}lipo; ac_word=$2 +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 +$as_echo_n "checking for $ac_word... " >&6; } +if ${ac_cv_prog_LIPO+:} false; then : + $as_echo_n "(cached) " >&6 +else + if test -n "$LIPO"; then + ac_cv_prog_LIPO="$LIPO" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then + ac_cv_prog_LIPO="${ac_tool_prefix}lipo" + $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done + done +IFS=$as_save_IFS + +fi +fi +LIPO=$ac_cv_prog_LIPO +if test -n "$LIPO"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $LIPO" >&5 +$as_echo "$LIPO" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + +fi +if test -z "$ac_cv_prog_LIPO"; then + ac_ct_LIPO=$LIPO + # Extract the first word of "lipo", so it can be a program name with args. +set dummy lipo; ac_word=$2 +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 +$as_echo_n "checking for $ac_word... " >&6; } +if ${ac_cv_prog_ac_ct_LIPO+:} false; then : + $as_echo_n "(cached) " >&6 +else + if test -n "$ac_ct_LIPO"; then + ac_cv_prog_ac_ct_LIPO="$ac_ct_LIPO" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then + ac_cv_prog_ac_ct_LIPO="lipo" + $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done + done +IFS=$as_save_IFS + +fi +fi +ac_ct_LIPO=$ac_cv_prog_ac_ct_LIPO +if test -n "$ac_ct_LIPO"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_LIPO" >&5 +$as_echo "$ac_ct_LIPO" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + if test "x$ac_ct_LIPO" = x; then + LIPO=":" + else + case $cross_compiling:$ac_tool_warned in +yes:) +{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5 +$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;} +ac_tool_warned=yes ;; +esac + LIPO=$ac_ct_LIPO + fi +else + LIPO="$ac_cv_prog_LIPO" +fi + + if test -n "$ac_tool_prefix"; then + # Extract the first word of "${ac_tool_prefix}otool", so it can be a program name with args. +set dummy ${ac_tool_prefix}otool; ac_word=$2 +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 +$as_echo_n "checking for $ac_word... " >&6; } +if ${ac_cv_prog_OTOOL+:} false; then : + $as_echo_n "(cached) " >&6 +else + if test -n "$OTOOL"; then + ac_cv_prog_OTOOL="$OTOOL" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then + ac_cv_prog_OTOOL="${ac_tool_prefix}otool" + $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done + done +IFS=$as_save_IFS + +fi +fi +OTOOL=$ac_cv_prog_OTOOL +if test -n "$OTOOL"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $OTOOL" >&5 +$as_echo "$OTOOL" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + +fi +if test -z "$ac_cv_prog_OTOOL"; then + ac_ct_OTOOL=$OTOOL + # Extract the first word of "otool", so it can be a program name with args. +set dummy otool; ac_word=$2 +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 +$as_echo_n "checking for $ac_word... " >&6; } +if ${ac_cv_prog_ac_ct_OTOOL+:} false; then : + $as_echo_n "(cached) " >&6 +else + if test -n "$ac_ct_OTOOL"; then + ac_cv_prog_ac_ct_OTOOL="$ac_ct_OTOOL" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then + ac_cv_prog_ac_ct_OTOOL="otool" + $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done + done +IFS=$as_save_IFS + +fi +fi +ac_ct_OTOOL=$ac_cv_prog_ac_ct_OTOOL +if test -n "$ac_ct_OTOOL"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_OTOOL" >&5 +$as_echo "$ac_ct_OTOOL" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + if test "x$ac_ct_OTOOL" = x; then + OTOOL=":" + else + case $cross_compiling:$ac_tool_warned in +yes:) +{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5 +$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;} +ac_tool_warned=yes ;; +esac + OTOOL=$ac_ct_OTOOL + fi +else + OTOOL="$ac_cv_prog_OTOOL" +fi + + if test -n "$ac_tool_prefix"; then + # Extract the first word of "${ac_tool_prefix}otool64", so it can be a program name with args. +set dummy ${ac_tool_prefix}otool64; ac_word=$2 +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 +$as_echo_n "checking for $ac_word... " >&6; } +if ${ac_cv_prog_OTOOL64+:} false; then : + $as_echo_n "(cached) " >&6 +else + if test -n "$OTOOL64"; then + ac_cv_prog_OTOOL64="$OTOOL64" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then + ac_cv_prog_OTOOL64="${ac_tool_prefix}otool64" + $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done + done +IFS=$as_save_IFS + +fi +fi +OTOOL64=$ac_cv_prog_OTOOL64 +if test -n "$OTOOL64"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $OTOOL64" >&5 +$as_echo "$OTOOL64" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + +fi +if test -z "$ac_cv_prog_OTOOL64"; then + ac_ct_OTOOL64=$OTOOL64 + # Extract the first word of "otool64", so it can be a program name with args. +set dummy otool64; ac_word=$2 +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 +$as_echo_n "checking for $ac_word... " >&6; } +if ${ac_cv_prog_ac_ct_OTOOL64+:} false; then : + $as_echo_n "(cached) " >&6 +else + if test -n "$ac_ct_OTOOL64"; then + ac_cv_prog_ac_ct_OTOOL64="$ac_ct_OTOOL64" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then + ac_cv_prog_ac_ct_OTOOL64="otool64" + $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done + done +IFS=$as_save_IFS + +fi +fi +ac_ct_OTOOL64=$ac_cv_prog_ac_ct_OTOOL64 +if test -n "$ac_ct_OTOOL64"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_OTOOL64" >&5 +$as_echo "$ac_ct_OTOOL64" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + if test "x$ac_ct_OTOOL64" = x; then + OTOOL64=":" + else + case $cross_compiling:$ac_tool_warned in +yes:) +{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5 +$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;} +ac_tool_warned=yes ;; +esac + OTOOL64=$ac_ct_OTOOL64 + fi +else + OTOOL64="$ac_cv_prog_OTOOL64" +fi + + + + + + + + + + + + + + + + + + + + + + + + + + + + { $as_echo "$as_me:${as_lineno-$LINENO}: checking for -single_module linker flag" >&5 +$as_echo_n "checking for -single_module linker flag... " >&6; } +if ${lt_cv_apple_cc_single_mod+:} false; then : + $as_echo_n "(cached) " >&6 +else + lt_cv_apple_cc_single_mod=no + if test -z "$LT_MULTI_MODULE"; then + # By default we will add the -single_module flag. You can override + # by either setting the environment variable LT_MULTI_MODULE + # non-empty at configure time, or by adding -multi_module to the + # link flags. + rm -rf libconftest.dylib* + echo "int foo(void){return 1;}" > conftest.c + echo "$LTCC $LTCFLAGS $LDFLAGS -o libconftest.dylib \ +-dynamiclib -Wl,-single_module conftest.c" >&5 + $LTCC $LTCFLAGS $LDFLAGS -o libconftest.dylib \ + -dynamiclib -Wl,-single_module conftest.c 2>conftest.err + _lt_result=$? + # If there is a non-empty error log, and "single_module" + # appears in it, assume the flag caused a linker warning + if test -s conftest.err && $GREP single_module conftest.err; then + cat conftest.err >&5 + # Otherwise, if the output was created with a 0 exit code from + # the compiler, it worked. + elif test -f libconftest.dylib && test 0 = "$_lt_result"; then + lt_cv_apple_cc_single_mod=yes + else + cat conftest.err >&5 + fi + rm -rf libconftest.dylib* + rm -f conftest.* + fi +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_apple_cc_single_mod" >&5 +$as_echo "$lt_cv_apple_cc_single_mod" >&6; } + + { $as_echo "$as_me:${as_lineno-$LINENO}: checking for -exported_symbols_list linker flag" >&5 +$as_echo_n "checking for -exported_symbols_list linker flag... " >&6; } +if ${lt_cv_ld_exported_symbols_list+:} false; then : + $as_echo_n "(cached) " >&6 +else + lt_cv_ld_exported_symbols_list=no + save_LDFLAGS=$LDFLAGS + echo "_main" > conftest.sym + LDFLAGS="$LDFLAGS -Wl,-exported_symbols_list,conftest.sym" + cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ + +int +main () +{ + + ; + return 0; +} +_ACEOF +if ac_fn_c_try_link "$LINENO"; then : + lt_cv_ld_exported_symbols_list=yes +else + lt_cv_ld_exported_symbols_list=no +fi +rm -f core conftest.err conftest.$ac_objext \ + conftest$ac_exeext conftest.$ac_ext + LDFLAGS=$save_LDFLAGS + +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_ld_exported_symbols_list" >&5 +$as_echo "$lt_cv_ld_exported_symbols_list" >&6; } + + { $as_echo "$as_me:${as_lineno-$LINENO}: checking for -force_load linker flag" >&5 +$as_echo_n "checking for -force_load linker flag... " >&6; } +if ${lt_cv_ld_force_load+:} false; then : + $as_echo_n "(cached) " >&6 +else + lt_cv_ld_force_load=no + cat > conftest.c << _LT_EOF +int forced_loaded() { return 2;} +_LT_EOF + echo "$LTCC $LTCFLAGS -c -o conftest.o conftest.c" >&5 + $LTCC $LTCFLAGS -c -o conftest.o conftest.c 2>&5 + echo "$AR cru libconftest.a conftest.o" >&5 + $AR cru libconftest.a conftest.o 2>&5 + echo "$RANLIB libconftest.a" >&5 + $RANLIB libconftest.a 2>&5 + cat > conftest.c << _LT_EOF +int main() { return 0;} +_LT_EOF + echo "$LTCC $LTCFLAGS $LDFLAGS -o conftest conftest.c -Wl,-force_load,./libconftest.a" >&5 + $LTCC $LTCFLAGS $LDFLAGS -o conftest conftest.c -Wl,-force_load,./libconftest.a 2>conftest.err + _lt_result=$? + if test -s conftest.err && $GREP force_load conftest.err; then + cat conftest.err >&5 + elif test -f conftest && test 0 = "$_lt_result" && $GREP forced_load conftest >/dev/null 2>&1; then + lt_cv_ld_force_load=yes + else + cat conftest.err >&5 + fi + rm -f conftest.err libconftest.a conftest conftest.c + rm -rf conftest.dSYM + +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_ld_force_load" >&5 +$as_echo "$lt_cv_ld_force_load" >&6; } + case $host_os in + rhapsody* | darwin1.[012]) + _lt_dar_allow_undefined='$wl-undefined ${wl}suppress' ;; + darwin1.*) + _lt_dar_allow_undefined='$wl-flat_namespace $wl-undefined ${wl}suppress' ;; + darwin*) # darwin 5.x on + # if running on 10.5 or later, the deployment target defaults + # to the OS version, if on x86, and 10.4, the deployment + # target defaults to 10.4. Don't you love it? + case ${MACOSX_DEPLOYMENT_TARGET-10.0},$host in + 10.0,*86*-darwin8*|10.0,*-darwin[91]*) + _lt_dar_allow_undefined='$wl-undefined ${wl}dynamic_lookup' ;; + 10.[012][,.]*) + _lt_dar_allow_undefined='$wl-flat_namespace $wl-undefined ${wl}suppress' ;; + 10.*) + _lt_dar_allow_undefined='$wl-undefined ${wl}dynamic_lookup' ;; + esac + ;; + esac + if test yes = "$lt_cv_apple_cc_single_mod"; then + _lt_dar_single_mod='$single_module' + fi + if test yes = "$lt_cv_ld_exported_symbols_list"; then + _lt_dar_export_syms=' $wl-exported_symbols_list,$output_objdir/$libname-symbols.expsym' + else + _lt_dar_export_syms='~$NMEDIT -s $output_objdir/$libname-symbols.expsym $lib' + fi + if test : != "$DSYMUTIL" && test no = "$lt_cv_ld_force_load"; then + _lt_dsymutil='~$DSYMUTIL $lib || :' + else + _lt_dsymutil= + fi + ;; + esac + +# func_munge_path_list VARIABLE PATH +# ----------------------------------- +# VARIABLE is name of variable containing _space_ separated list of +# directories to be munged by the contents of PATH, which is string +# having a format: +# "DIR[:DIR]:" +# string "DIR[ DIR]" will be prepended to VARIABLE +# ":DIR[:DIR]" +# string "DIR[ DIR]" will be appended to VARIABLE +# "DIRP[:DIRP]::[DIRA:]DIRA" +# string "DIRP[ DIRP]" will be prepended to VARIABLE and string +# "DIRA[ DIRA]" will be appended to VARIABLE +# "DIR[:DIR]" +# VARIABLE will be replaced by "DIR[ DIR]" +func_munge_path_list () +{ + case x$2 in + x) + ;; + *:) + eval $1=\"`$ECHO $2 | $SED 's/:/ /g'` \$$1\" + ;; + x:*) + eval $1=\"\$$1 `$ECHO $2 | $SED 's/:/ /g'`\" + ;; + *::*) + eval $1=\"\$$1\ `$ECHO $2 | $SED -e 's/.*:://' -e 's/:/ /g'`\" + eval $1=\"`$ECHO $2 | $SED -e 's/::.*//' -e 's/:/ /g'`\ \$$1\" + ;; + *) + eval $1=\"`$ECHO $2 | $SED 's/:/ /g'`\" + ;; + esac +} + + +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for ANSI C header files" >&5 +$as_echo_n "checking for ANSI C header files... " >&6; } +if ${ac_cv_header_stdc+:} false; then : + $as_echo_n "(cached) " >&6 +else + cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ +#include +#include +#include +#include + +int +main () +{ + + ; + return 0; +} +_ACEOF +if ac_fn_c_try_compile "$LINENO"; then : + ac_cv_header_stdc=yes +else + ac_cv_header_stdc=no +fi +rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext + +if test $ac_cv_header_stdc = yes; then + # SunOS 4.x string.h does not declare mem*, contrary to ANSI. + cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ +#include + +_ACEOF +if (eval "$ac_cpp conftest.$ac_ext") 2>&5 | + $EGREP "memchr" >/dev/null 2>&1; then : + +else + ac_cv_header_stdc=no +fi +rm -f conftest* + +fi + +if test $ac_cv_header_stdc = yes; then + # ISC 2.0.2 stdlib.h does not declare free, contrary to ANSI. + cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ +#include + +_ACEOF +if (eval "$ac_cpp conftest.$ac_ext") 2>&5 | + $EGREP "free" >/dev/null 2>&1; then : + +else + ac_cv_header_stdc=no +fi +rm -f conftest* + +fi + +if test $ac_cv_header_stdc = yes; then + # /bin/cc in Irix-4.0.5 gets non-ANSI ctype macros unless using -ansi. + if test "$cross_compiling" = yes; then : + : +else + cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ +#include +#include +#if ((' ' & 0x0FF) == 0x020) +# define ISLOWER(c) ('a' <= (c) && (c) <= 'z') +# define TOUPPER(c) (ISLOWER(c) ? 'A' + ((c) - 'a') : (c)) +#else +# define ISLOWER(c) \ + (('a' <= (c) && (c) <= 'i') \ + || ('j' <= (c) && (c) <= 'r') \ + || ('s' <= (c) && (c) <= 'z')) +# define TOUPPER(c) (ISLOWER(c) ? ((c) | 0x40) : (c)) +#endif + +#define XOR(e, f) (((e) && !(f)) || (!(e) && (f))) +int +main () +{ + int i; + for (i = 0; i < 256; i++) + if (XOR (islower (i), ISLOWER (i)) + || toupper (i) != TOUPPER (i)) + return 2; + return 0; +} +_ACEOF +if ac_fn_c_try_run "$LINENO"; then : + +else + ac_cv_header_stdc=no +fi +rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \ + conftest.$ac_objext conftest.beam conftest.$ac_ext +fi + +fi +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_header_stdc" >&5 +$as_echo "$ac_cv_header_stdc" >&6; } +if test $ac_cv_header_stdc = yes; then + +$as_echo "#define STDC_HEADERS 1" >>confdefs.h + +fi + +# On IRIX 5.3, sys/types and inttypes.h are conflicting. +for ac_header in sys/types.h sys/stat.h stdlib.h string.h memory.h strings.h \ + inttypes.h stdint.h unistd.h +do : + as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh` +ac_fn_c_check_header_compile "$LINENO" "$ac_header" "$as_ac_Header" "$ac_includes_default +" +if eval test \"x\$"$as_ac_Header"\" = x"yes"; then : + cat >>confdefs.h <<_ACEOF +#define `$as_echo "HAVE_$ac_header" | $as_tr_cpp` 1 +_ACEOF + +fi + +done + + +for ac_header in dlfcn.h +do : + ac_fn_c_check_header_compile "$LINENO" "dlfcn.h" "ac_cv_header_dlfcn_h" "$ac_includes_default +" +if test "x$ac_cv_header_dlfcn_h" = xyes; then : + cat >>confdefs.h <<_ACEOF +#define HAVE_DLFCN_H 1 +_ACEOF + +fi + +done + + + + + +# Set options +enable_win32_dll=yes + +case $host in +*-*-cygwin* | *-*-mingw* | *-*-pw32* | *-*-cegcc*) + if test -n "$ac_tool_prefix"; then + # Extract the first word of "${ac_tool_prefix}as", so it can be a program name with args. +set dummy ${ac_tool_prefix}as; ac_word=$2 +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 +$as_echo_n "checking for $ac_word... " >&6; } +if ${ac_cv_prog_AS+:} false; then : + $as_echo_n "(cached) " >&6 +else + if test -n "$AS"; then + ac_cv_prog_AS="$AS" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then + ac_cv_prog_AS="${ac_tool_prefix}as" + $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done + done +IFS=$as_save_IFS + +fi +fi +AS=$ac_cv_prog_AS +if test -n "$AS"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $AS" >&5 +$as_echo "$AS" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + +fi +if test -z "$ac_cv_prog_AS"; then + ac_ct_AS=$AS + # Extract the first word of "as", so it can be a program name with args. +set dummy as; ac_word=$2 +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 +$as_echo_n "checking for $ac_word... " >&6; } +if ${ac_cv_prog_ac_ct_AS+:} false; then : + $as_echo_n "(cached) " >&6 +else + if test -n "$ac_ct_AS"; then + ac_cv_prog_ac_ct_AS="$ac_ct_AS" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then + ac_cv_prog_ac_ct_AS="as" + $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done + done +IFS=$as_save_IFS + +fi +fi +ac_ct_AS=$ac_cv_prog_ac_ct_AS +if test -n "$ac_ct_AS"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_AS" >&5 +$as_echo "$ac_ct_AS" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + if test "x$ac_ct_AS" = x; then + AS="false" + else + case $cross_compiling:$ac_tool_warned in +yes:) +{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5 +$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;} +ac_tool_warned=yes ;; +esac + AS=$ac_ct_AS + fi +else + AS="$ac_cv_prog_AS" +fi + + if test -n "$ac_tool_prefix"; then + # Extract the first word of "${ac_tool_prefix}dlltool", so it can be a program name with args. +set dummy ${ac_tool_prefix}dlltool; ac_word=$2 +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 +$as_echo_n "checking for $ac_word... " >&6; } +if ${ac_cv_prog_DLLTOOL+:} false; then : + $as_echo_n "(cached) " >&6 +else + if test -n "$DLLTOOL"; then + ac_cv_prog_DLLTOOL="$DLLTOOL" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then + ac_cv_prog_DLLTOOL="${ac_tool_prefix}dlltool" + $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done + done +IFS=$as_save_IFS + +fi +fi +DLLTOOL=$ac_cv_prog_DLLTOOL +if test -n "$DLLTOOL"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $DLLTOOL" >&5 +$as_echo "$DLLTOOL" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + +fi +if test -z "$ac_cv_prog_DLLTOOL"; then + ac_ct_DLLTOOL=$DLLTOOL + # Extract the first word of "dlltool", so it can be a program name with args. +set dummy dlltool; ac_word=$2 +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 +$as_echo_n "checking for $ac_word... " >&6; } +if ${ac_cv_prog_ac_ct_DLLTOOL+:} false; then : + $as_echo_n "(cached) " >&6 +else + if test -n "$ac_ct_DLLTOOL"; then + ac_cv_prog_ac_ct_DLLTOOL="$ac_ct_DLLTOOL" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then + ac_cv_prog_ac_ct_DLLTOOL="dlltool" + $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done + done +IFS=$as_save_IFS + +fi +fi +ac_ct_DLLTOOL=$ac_cv_prog_ac_ct_DLLTOOL +if test -n "$ac_ct_DLLTOOL"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_DLLTOOL" >&5 +$as_echo "$ac_ct_DLLTOOL" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + if test "x$ac_ct_DLLTOOL" = x; then + DLLTOOL="false" + else + case $cross_compiling:$ac_tool_warned in +yes:) +{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5 +$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;} +ac_tool_warned=yes ;; +esac + DLLTOOL=$ac_ct_DLLTOOL + fi +else + DLLTOOL="$ac_cv_prog_DLLTOOL" +fi + + if test -n "$ac_tool_prefix"; then + # Extract the first word of "${ac_tool_prefix}objdump", so it can be a program name with args. +set dummy ${ac_tool_prefix}objdump; ac_word=$2 +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 +$as_echo_n "checking for $ac_word... " >&6; } +if ${ac_cv_prog_OBJDUMP+:} false; then : + $as_echo_n "(cached) " >&6 +else + if test -n "$OBJDUMP"; then + ac_cv_prog_OBJDUMP="$OBJDUMP" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then + ac_cv_prog_OBJDUMP="${ac_tool_prefix}objdump" + $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done + done +IFS=$as_save_IFS + +fi +fi +OBJDUMP=$ac_cv_prog_OBJDUMP +if test -n "$OBJDUMP"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $OBJDUMP" >&5 +$as_echo "$OBJDUMP" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + +fi +if test -z "$ac_cv_prog_OBJDUMP"; then + ac_ct_OBJDUMP=$OBJDUMP + # Extract the first word of "objdump", so it can be a program name with args. +set dummy objdump; ac_word=$2 +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 +$as_echo_n "checking for $ac_word... " >&6; } +if ${ac_cv_prog_ac_ct_OBJDUMP+:} false; then : + $as_echo_n "(cached) " >&6 +else + if test -n "$ac_ct_OBJDUMP"; then + ac_cv_prog_ac_ct_OBJDUMP="$ac_ct_OBJDUMP" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then + ac_cv_prog_ac_ct_OBJDUMP="objdump" + $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done + done +IFS=$as_save_IFS + +fi +fi +ac_ct_OBJDUMP=$ac_cv_prog_ac_ct_OBJDUMP +if test -n "$ac_ct_OBJDUMP"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_OBJDUMP" >&5 +$as_echo "$ac_ct_OBJDUMP" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + if test "x$ac_ct_OBJDUMP" = x; then + OBJDUMP="false" + else + case $cross_compiling:$ac_tool_warned in +yes:) +{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5 +$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;} +ac_tool_warned=yes ;; +esac + OBJDUMP=$ac_ct_OBJDUMP + fi +else + OBJDUMP="$ac_cv_prog_OBJDUMP" +fi + + ;; +esac + +test -z "$AS" && AS=as + + + + + +test -z "$DLLTOOL" && DLLTOOL=dlltool + + + + + +test -z "$OBJDUMP" && OBJDUMP=objdump + + + + + + + + enable_dlopen=no + + + + # Check whether --enable-shared was given. +if test "${enable_shared+set}" = set; then : + enableval=$enable_shared; p=${PACKAGE-default} + case $enableval in + yes) enable_shared=yes ;; + no) enable_shared=no ;; + *) + enable_shared=no + # Look at the argument we got. We use all the common list separators. + lt_save_ifs=$IFS; IFS=$IFS$PATH_SEPARATOR, + for pkg in $enableval; do + IFS=$lt_save_ifs + if test "X$pkg" = "X$p"; then + enable_shared=yes + fi + done + IFS=$lt_save_ifs + ;; + esac +else + enable_shared=yes +fi + + + + + + + + + + # Check whether --enable-static was given. +if test "${enable_static+set}" = set; then : + enableval=$enable_static; p=${PACKAGE-default} + case $enableval in + yes) enable_static=yes ;; + no) enable_static=no ;; + *) + enable_static=no + # Look at the argument we got. We use all the common list separators. + lt_save_ifs=$IFS; IFS=$IFS$PATH_SEPARATOR, + for pkg in $enableval; do + IFS=$lt_save_ifs + if test "X$pkg" = "X$p"; then + enable_static=yes + fi + done + IFS=$lt_save_ifs + ;; + esac +else + enable_static=yes +fi + + + + + + + + + + +# Check whether --with-pic was given. +if test "${with_pic+set}" = set; then : + withval=$with_pic; lt_p=${PACKAGE-default} + case $withval in + yes|no) pic_mode=$withval ;; + *) + pic_mode=default + # Look at the argument we got. We use all the common list separators. + lt_save_ifs=$IFS; IFS=$IFS$PATH_SEPARATOR, + for lt_pkg in $withval; do + IFS=$lt_save_ifs + if test "X$lt_pkg" = "X$lt_p"; then + pic_mode=yes + fi + done + IFS=$lt_save_ifs + ;; + esac +else + pic_mode=default +fi + + + + + + + + + # Check whether --enable-fast-install was given. +if test "${enable_fast_install+set}" = set; then : + enableval=$enable_fast_install; p=${PACKAGE-default} + case $enableval in + yes) enable_fast_install=yes ;; + no) enable_fast_install=no ;; + *) + enable_fast_install=no + # Look at the argument we got. We use all the common list separators. + lt_save_ifs=$IFS; IFS=$IFS$PATH_SEPARATOR, + for pkg in $enableval; do + IFS=$lt_save_ifs + if test "X$pkg" = "X$p"; then + enable_fast_install=yes + fi + done + IFS=$lt_save_ifs + ;; + esac +else + enable_fast_install=yes +fi + + + + + + + + + shared_archive_member_spec= +case $host,$enable_shared in +power*-*-aix[5-9]*,yes) + { $as_echo "$as_me:${as_lineno-$LINENO}: checking which variant of shared library versioning to provide" >&5 +$as_echo_n "checking which variant of shared library versioning to provide... " >&6; } + +# Check whether --with-aix-soname was given. +if test "${with_aix_soname+set}" = set; then : + withval=$with_aix_soname; case $withval in + aix|svr4|both) + ;; + *) + as_fn_error $? "Unknown argument to --with-aix-soname" "$LINENO" 5 + ;; + esac + lt_cv_with_aix_soname=$with_aix_soname +else + if ${lt_cv_with_aix_soname+:} false; then : + $as_echo_n "(cached) " >&6 +else + lt_cv_with_aix_soname=aix +fi + + with_aix_soname=$lt_cv_with_aix_soname +fi + + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $with_aix_soname" >&5 +$as_echo "$with_aix_soname" >&6; } + if test aix != "$with_aix_soname"; then + # For the AIX way of multilib, we name the shared archive member + # based on the bitwidth used, traditionally 'shr.o' or 'shr_64.o', + # and 'shr.imp' or 'shr_64.imp', respectively, for the Import File. + # Even when GNU compilers ignore OBJECT_MODE but need '-maix64' flag, + # the AIX toolchain works better with OBJECT_MODE set (default 32). + if test 64 = "${OBJECT_MODE-32}"; then + shared_archive_member_spec=shr_64 + else + shared_archive_member_spec=shr + fi + fi + ;; +*) + with_aix_soname=aix + ;; +esac + + + + + + + + + + +# This can be used to rebuild libtool when needed +LIBTOOL_DEPS=$ltmain + +# Always use our own libtool. +LIBTOOL='$(SHELL) $(top_builddir)/libtool' + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +test -z "$LN_S" && LN_S="ln -s" + + + + + + + + + + + + + + +if test -n "${ZSH_VERSION+set}"; then + setopt NO_GLOB_SUBST +fi + +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for objdir" >&5 +$as_echo_n "checking for objdir... " >&6; } +if ${lt_cv_objdir+:} false; then : + $as_echo_n "(cached) " >&6 +else + rm -f .libs 2>/dev/null +mkdir .libs 2>/dev/null +if test -d .libs; then + lt_cv_objdir=.libs +else + # MS-DOS does not allow filenames that begin with a dot. + lt_cv_objdir=_libs +fi +rmdir .libs 2>/dev/null +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_objdir" >&5 +$as_echo "$lt_cv_objdir" >&6; } +objdir=$lt_cv_objdir + + + + + +cat >>confdefs.h <<_ACEOF +#define LT_OBJDIR "$lt_cv_objdir/" +_ACEOF + + + + +case $host_os in +aix3*) + # AIX sometimes has problems with the GCC collect2 program. For some + # reason, if we set the COLLECT_NAMES environment variable, the problems + # vanish in a puff of smoke. + if test set != "${COLLECT_NAMES+set}"; then + COLLECT_NAMES= + export COLLECT_NAMES + fi + ;; +esac + +# Global variables: +ofile=libtool +can_build_shared=yes + +# All known linkers require a '.a' archive for static linking (except MSVC, +# which needs '.lib'). +libext=a + +with_gnu_ld=$lt_cv_prog_gnu_ld + +old_CC=$CC +old_CFLAGS=$CFLAGS + +# Set sane defaults for various variables +test -z "$CC" && CC=cc +test -z "$LTCC" && LTCC=$CC +test -z "$LTCFLAGS" && LTCFLAGS=$CFLAGS +test -z "$LD" && LD=ld +test -z "$ac_objext" && ac_objext=o + +func_cc_basename $compiler +cc_basename=$func_cc_basename_result + + +# Only perform the check for file, if the check method requires it +test -z "$MAGIC_CMD" && MAGIC_CMD=file +case $deplibs_check_method in +file_magic*) + if test "$file_magic_cmd" = '$MAGIC_CMD'; then + { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ${ac_tool_prefix}file" >&5 +$as_echo_n "checking for ${ac_tool_prefix}file... " >&6; } +if ${lt_cv_path_MAGIC_CMD+:} false; then : + $as_echo_n "(cached) " >&6 +else + case $MAGIC_CMD in +[\\/*] | ?:[\\/]*) + lt_cv_path_MAGIC_CMD=$MAGIC_CMD # Let the user override the test with a path. + ;; +*) + lt_save_MAGIC_CMD=$MAGIC_CMD + lt_save_ifs=$IFS; IFS=$PATH_SEPARATOR + ac_dummy="/usr/bin$PATH_SEPARATOR$PATH" + for ac_dir in $ac_dummy; do + IFS=$lt_save_ifs + test -z "$ac_dir" && ac_dir=. + if test -f "$ac_dir/${ac_tool_prefix}file"; then + lt_cv_path_MAGIC_CMD=$ac_dir/"${ac_tool_prefix}file" + if test -n "$file_magic_test_file"; then + case $deplibs_check_method in + "file_magic "*) + file_magic_regex=`expr "$deplibs_check_method" : "file_magic \(.*\)"` + MAGIC_CMD=$lt_cv_path_MAGIC_CMD + if eval $file_magic_cmd \$file_magic_test_file 2> /dev/null | + $EGREP "$file_magic_regex" > /dev/null; then + : + else + cat <<_LT_EOF 1>&2 + +*** Warning: the command libtool uses to detect shared libraries, +*** $file_magic_cmd, produces output that libtool cannot recognize. +*** The result is that libtool may fail to recognize shared libraries +*** as such. This will affect the creation of libtool libraries that +*** depend on shared libraries, but programs linked with such libtool +*** libraries will work regardless of this problem. Nevertheless, you +*** may want to report the problem to your system manager and/or to +*** bug-libtool@gnu.org + +_LT_EOF + fi ;; + esac + fi + break + fi + done + IFS=$lt_save_ifs + MAGIC_CMD=$lt_save_MAGIC_CMD + ;; +esac +fi + +MAGIC_CMD=$lt_cv_path_MAGIC_CMD +if test -n "$MAGIC_CMD"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $MAGIC_CMD" >&5 +$as_echo "$MAGIC_CMD" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + + + + +if test -z "$lt_cv_path_MAGIC_CMD"; then + if test -n "$ac_tool_prefix"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: checking for file" >&5 +$as_echo_n "checking for file... " >&6; } +if ${lt_cv_path_MAGIC_CMD+:} false; then : + $as_echo_n "(cached) " >&6 +else + case $MAGIC_CMD in +[\\/*] | ?:[\\/]*) + lt_cv_path_MAGIC_CMD=$MAGIC_CMD # Let the user override the test with a path. + ;; +*) + lt_save_MAGIC_CMD=$MAGIC_CMD + lt_save_ifs=$IFS; IFS=$PATH_SEPARATOR + ac_dummy="/usr/bin$PATH_SEPARATOR$PATH" + for ac_dir in $ac_dummy; do + IFS=$lt_save_ifs + test -z "$ac_dir" && ac_dir=. + if test -f "$ac_dir/file"; then + lt_cv_path_MAGIC_CMD=$ac_dir/"file" + if test -n "$file_magic_test_file"; then + case $deplibs_check_method in + "file_magic "*) + file_magic_regex=`expr "$deplibs_check_method" : "file_magic \(.*\)"` + MAGIC_CMD=$lt_cv_path_MAGIC_CMD + if eval $file_magic_cmd \$file_magic_test_file 2> /dev/null | + $EGREP "$file_magic_regex" > /dev/null; then + : + else + cat <<_LT_EOF 1>&2 + +*** Warning: the command libtool uses to detect shared libraries, +*** $file_magic_cmd, produces output that libtool cannot recognize. +*** The result is that libtool may fail to recognize shared libraries +*** as such. This will affect the creation of libtool libraries that +*** depend on shared libraries, but programs linked with such libtool +*** libraries will work regardless of this problem. Nevertheless, you +*** may want to report the problem to your system manager and/or to +*** bug-libtool@gnu.org + +_LT_EOF + fi ;; + esac + fi + break + fi + done + IFS=$lt_save_ifs + MAGIC_CMD=$lt_save_MAGIC_CMD + ;; +esac +fi + +MAGIC_CMD=$lt_cv_path_MAGIC_CMD +if test -n "$MAGIC_CMD"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $MAGIC_CMD" >&5 +$as_echo "$MAGIC_CMD" >&6; } +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + + + else + MAGIC_CMD=: + fi +fi + + fi + ;; +esac + +# Use C for the default configuration in the libtool script + +lt_save_CC=$CC +ac_ext=c +ac_cpp='$CPP $CPPFLAGS' +ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5' +ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5' +ac_compiler_gnu=$ac_cv_c_compiler_gnu + + +# Source file extension for C test sources. +ac_ext=c + +# Object file extension for compiled C test sources. +objext=o +objext=$objext + +# Code to be used in simple compile tests +lt_simple_compile_test_code="int some_variable = 0;" + +# Code to be used in simple link tests +lt_simple_link_test_code='int main(){return(0);}' + + + + + + + +# If no C compiler was specified, use CC. +LTCC=${LTCC-"$CC"} + +# If no C compiler flags were specified, use CFLAGS. +LTCFLAGS=${LTCFLAGS-"$CFLAGS"} + +# Allow CC to be a program name with arguments. +compiler=$CC + +# Save the default compiler, since it gets overwritten when the other +# tags are being tested, and _LT_TAGVAR(compiler, []) is a NOP. +compiler_DEFAULT=$CC + +# save warnings/boilerplate of simple test code +ac_outfile=conftest.$ac_objext +echo "$lt_simple_compile_test_code" >conftest.$ac_ext +eval "$ac_compile" 2>&1 >/dev/null | $SED '/^$/d; /^ *+/d' >conftest.err +_lt_compiler_boilerplate=`cat conftest.err` +$RM conftest* + +ac_outfile=conftest.$ac_objext +echo "$lt_simple_link_test_code" >conftest.$ac_ext +eval "$ac_link" 2>&1 >/dev/null | $SED '/^$/d; /^ *+/d' >conftest.err +_lt_linker_boilerplate=`cat conftest.err` +$RM -r conftest* + + +## CAVEAT EMPTOR: +## There is no encapsulation within the following macros, do not change +## the running order or otherwise move them around unless you know exactly +## what you are doing... +if test -n "$compiler"; then + +lt_prog_compiler_no_builtin_flag= + +if test yes = "$GCC"; then + case $cc_basename in + nvcc*) + lt_prog_compiler_no_builtin_flag=' -Xcompiler -fno-builtin' ;; + *) + lt_prog_compiler_no_builtin_flag=' -fno-builtin' ;; + esac + + { $as_echo "$as_me:${as_lineno-$LINENO}: checking if $compiler supports -fno-rtti -fno-exceptions" >&5 +$as_echo_n "checking if $compiler supports -fno-rtti -fno-exceptions... " >&6; } +if ${lt_cv_prog_compiler_rtti_exceptions+:} false; then : + $as_echo_n "(cached) " >&6 +else + lt_cv_prog_compiler_rtti_exceptions=no + ac_outfile=conftest.$ac_objext + echo "$lt_simple_compile_test_code" > conftest.$ac_ext + lt_compiler_flag="-fno-rtti -fno-exceptions" ## exclude from sc_useless_quotes_in_assignment + # Insert the option either (1) after the last *FLAGS variable, or + # (2) before a word containing "conftest.", or (3) at the end. + # Note that $ac_compile itself does not contain backslashes and begins + # with a dollar sign (not a hyphen), so the echo should work correctly. + # The option is referenced via a variable to avoid confusing sed. + lt_compile=`echo "$ac_compile" | $SED \ + -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \ + -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \ + -e 's:$: $lt_compiler_flag:'` + (eval echo "\"\$as_me:$LINENO: $lt_compile\"" >&5) + (eval "$lt_compile" 2>conftest.err) + ac_status=$? + cat conftest.err >&5 + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + if (exit $ac_status) && test -s "$ac_outfile"; then + # The compiler can only warn and ignore the option if not recognized + # So say no if there are warnings other than the usual output. + $ECHO "$_lt_compiler_boilerplate" | $SED '/^$/d' >conftest.exp + $SED '/^$/d; /^ *+/d' conftest.err >conftest.er2 + if test ! -s conftest.er2 || diff conftest.exp conftest.er2 >/dev/null; then + lt_cv_prog_compiler_rtti_exceptions=yes + fi + fi + $RM conftest* + +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_rtti_exceptions" >&5 +$as_echo "$lt_cv_prog_compiler_rtti_exceptions" >&6; } + +if test yes = "$lt_cv_prog_compiler_rtti_exceptions"; then + lt_prog_compiler_no_builtin_flag="$lt_prog_compiler_no_builtin_flag -fno-rtti -fno-exceptions" +else + : +fi + +fi + + + + + + + lt_prog_compiler_wl= +lt_prog_compiler_pic= +lt_prog_compiler_static= + + + if test yes = "$GCC"; then + lt_prog_compiler_wl='-Wl,' + lt_prog_compiler_static='-static' + + case $host_os in + aix*) + # All AIX code is PIC. + if test ia64 = "$host_cpu"; then + # AIX 5 now supports IA64 processor + lt_prog_compiler_static='-Bstatic' + fi + lt_prog_compiler_pic='-fPIC' + ;; + + amigaos*) + case $host_cpu in + powerpc) + # see comment about AmigaOS4 .so support + lt_prog_compiler_pic='-fPIC' + ;; + m68k) + # FIXME: we need at least 68020 code to build shared libraries, but + # adding the '-m68020' flag to GCC prevents building anything better, + # like '-m68040'. + lt_prog_compiler_pic='-m68020 -resident32 -malways-restore-a4' + ;; + esac + ;; + + beos* | irix5* | irix6* | nonstopux* | osf3* | osf4* | osf5*) + # PIC is the default for these OSes. + ;; + + mingw* | cygwin* | pw32* | os2* | cegcc*) + # This hack is so that the source file can tell whether it is being + # built for inclusion in a dll (and should export symbols for example). + # Although the cygwin gcc ignores -fPIC, still need this for old-style + # (--disable-auto-import) libraries + lt_prog_compiler_pic='-DDLL_EXPORT' + case $host_os in + os2*) + lt_prog_compiler_static='$wl-static' + ;; + esac + ;; + + darwin* | rhapsody*) + # PIC is the default on this platform + # Common symbols not allowed in MH_DYLIB files + lt_prog_compiler_pic='-fno-common' + ;; + + haiku*) + # PIC is the default for Haiku. + # The "-static" flag exists, but is broken. + lt_prog_compiler_static= + ;; + + hpux*) + # PIC is the default for 64-bit PA HP-UX, but not for 32-bit + # PA HP-UX. On IA64 HP-UX, PIC is the default but the pic flag + # sets the default TLS model and affects inlining. + case $host_cpu in + hppa*64*) + # +Z the default + ;; + *) + lt_prog_compiler_pic='-fPIC' + ;; + esac + ;; + + interix[3-9]*) + # Interix 3.x gcc -fpic/-fPIC options generate broken code. + # Instead, we relocate shared libraries at runtime. + ;; + + msdosdjgpp*) + # Just because we use GCC doesn't mean we suddenly get shared libraries + # on systems that don't support them. + lt_prog_compiler_can_build_shared=no + enable_shared=no + ;; + + *nto* | *qnx*) + # QNX uses GNU C++, but need to define -shared option too, otherwise + # it will coredump. + lt_prog_compiler_pic='-fPIC -shared' + ;; + + sysv4*MP*) + if test -d /usr/nec; then + lt_prog_compiler_pic=-Kconform_pic + fi + ;; + + *) + lt_prog_compiler_pic='-fPIC' + ;; + esac + + case $cc_basename in + nvcc*) # Cuda Compiler Driver 2.2 + lt_prog_compiler_wl='-Xlinker ' + if test -n "$lt_prog_compiler_pic"; then + lt_prog_compiler_pic="-Xcompiler $lt_prog_compiler_pic" + fi + ;; + esac + else + # PORTME Check for flag to pass linker flags through the system compiler. + case $host_os in + aix*) + lt_prog_compiler_wl='-Wl,' + if test ia64 = "$host_cpu"; then + # AIX 5 now supports IA64 processor + lt_prog_compiler_static='-Bstatic' + else + lt_prog_compiler_static='-bnso -bI:/lib/syscalls.exp' + fi + ;; + + darwin* | rhapsody*) + # PIC is the default on this platform + # Common symbols not allowed in MH_DYLIB files + lt_prog_compiler_pic='-fno-common' + case $cc_basename in + nagfor*) + # NAG Fortran compiler + lt_prog_compiler_wl='-Wl,-Wl,,' + lt_prog_compiler_pic='-PIC' + lt_prog_compiler_static='-Bstatic' + ;; + esac + ;; + + mingw* | cygwin* | pw32* | os2* | cegcc*) + # This hack is so that the source file can tell whether it is being + # built for inclusion in a dll (and should export symbols for example). + lt_prog_compiler_pic='-DDLL_EXPORT' + case $host_os in + os2*) + lt_prog_compiler_static='$wl-static' + ;; + esac + ;; + + hpux9* | hpux10* | hpux11*) + lt_prog_compiler_wl='-Wl,' + # PIC is the default for IA64 HP-UX and 64-bit HP-UX, but + # not for PA HP-UX. + case $host_cpu in + hppa*64*|ia64*) + # +Z the default + ;; + *) + lt_prog_compiler_pic='+Z' + ;; + esac + # Is there a better lt_prog_compiler_static that works with the bundled CC? + lt_prog_compiler_static='$wl-a ${wl}archive' + ;; + + irix5* | irix6* | nonstopux*) + lt_prog_compiler_wl='-Wl,' + # PIC (with -KPIC) is the default. + lt_prog_compiler_static='-non_shared' + ;; + + linux* | k*bsd*-gnu | kopensolaris*-gnu | gnu*) + case $cc_basename in + # old Intel for x86_64, which still supported -KPIC. + ecc*) + lt_prog_compiler_wl='-Wl,' + lt_prog_compiler_pic='-KPIC' + lt_prog_compiler_static='-static' + ;; + # icc used to be incompatible with GCC. + # ICC 10 doesn't accept -KPIC any more. + icc* | ifort*) + lt_prog_compiler_wl='-Wl,' + lt_prog_compiler_pic='-fPIC' + lt_prog_compiler_static='-static' + ;; + # Lahey Fortran 8.1. + lf95*) + lt_prog_compiler_wl='-Wl,' + lt_prog_compiler_pic='--shared' + lt_prog_compiler_static='--static' + ;; + nagfor*) + # NAG Fortran compiler + lt_prog_compiler_wl='-Wl,-Wl,,' + lt_prog_compiler_pic='-PIC' + lt_prog_compiler_static='-Bstatic' + ;; + tcc*) + # Fabrice Bellard et al's Tiny C Compiler + lt_prog_compiler_wl='-Wl,' + lt_prog_compiler_pic='-fPIC' + lt_prog_compiler_static='-static' + ;; + pgcc* | pgf77* | pgf90* | pgf95* | pgfortran*) + # Portland Group compilers (*not* the Pentium gcc compiler, + # which looks to be a dead project) + lt_prog_compiler_wl='-Wl,' + lt_prog_compiler_pic='-fpic' + lt_prog_compiler_static='-Bstatic' + ;; + ccc*) + lt_prog_compiler_wl='-Wl,' + # All Alpha code is PIC. + lt_prog_compiler_static='-non_shared' + ;; + xl* | bgxl* | bgf* | mpixl*) + # IBM XL C 8.0/Fortran 10.1, 11.1 on PPC and BlueGene + lt_prog_compiler_wl='-Wl,' + lt_prog_compiler_pic='-qpic' + lt_prog_compiler_static='-qstaticlink' + ;; + *) + case `$CC -V 2>&1 | sed 5q` in + *Sun\ Ceres\ Fortran* | *Sun*Fortran*\ [1-7].* | *Sun*Fortran*\ 8.[0-3]*) + # Sun Fortran 8.3 passes all unrecognized flags to the linker + lt_prog_compiler_pic='-KPIC' + lt_prog_compiler_static='-Bstatic' + lt_prog_compiler_wl='' + ;; + *Sun\ F* | *Sun*Fortran*) + lt_prog_compiler_pic='-KPIC' + lt_prog_compiler_static='-Bstatic' + lt_prog_compiler_wl='-Qoption ld ' + ;; + *Sun\ C*) + # Sun C 5.9 + lt_prog_compiler_pic='-KPIC' + lt_prog_compiler_static='-Bstatic' + lt_prog_compiler_wl='-Wl,' + ;; + *Intel*\ [CF]*Compiler*) + lt_prog_compiler_wl='-Wl,' + lt_prog_compiler_pic='-fPIC' + lt_prog_compiler_static='-static' + ;; + *Portland\ Group*) + lt_prog_compiler_wl='-Wl,' + lt_prog_compiler_pic='-fpic' + lt_prog_compiler_static='-Bstatic' + ;; + esac + ;; + esac + ;; + + newsos6) + lt_prog_compiler_pic='-KPIC' + lt_prog_compiler_static='-Bstatic' + ;; + + *nto* | *qnx*) + # QNX uses GNU C++, but need to define -shared option too, otherwise + # it will coredump. + lt_prog_compiler_pic='-fPIC -shared' + ;; + + osf3* | osf4* | osf5*) + lt_prog_compiler_wl='-Wl,' + # All OSF/1 code is PIC. + lt_prog_compiler_static='-non_shared' + ;; + + rdos*) + lt_prog_compiler_static='-non_shared' + ;; + + solaris*) + lt_prog_compiler_pic='-KPIC' + lt_prog_compiler_static='-Bstatic' + case $cc_basename in + f77* | f90* | f95* | sunf77* | sunf90* | sunf95*) + lt_prog_compiler_wl='-Qoption ld ';; + *) + lt_prog_compiler_wl='-Wl,';; + esac + ;; + + sunos4*) + lt_prog_compiler_wl='-Qoption ld ' + lt_prog_compiler_pic='-PIC' + lt_prog_compiler_static='-Bstatic' + ;; + + sysv4 | sysv4.2uw2* | sysv4.3*) + lt_prog_compiler_wl='-Wl,' + lt_prog_compiler_pic='-KPIC' + lt_prog_compiler_static='-Bstatic' + ;; + + sysv4*MP*) + if test -d /usr/nec; then + lt_prog_compiler_pic='-Kconform_pic' + lt_prog_compiler_static='-Bstatic' + fi + ;; + + sysv5* | unixware* | sco3.2v5* | sco5v6* | OpenUNIX*) + lt_prog_compiler_wl='-Wl,' + lt_prog_compiler_pic='-KPIC' + lt_prog_compiler_static='-Bstatic' + ;; + + unicos*) + lt_prog_compiler_wl='-Wl,' + lt_prog_compiler_can_build_shared=no + ;; + + uts4*) + lt_prog_compiler_pic='-pic' + lt_prog_compiler_static='-Bstatic' + ;; + + *) + lt_prog_compiler_can_build_shared=no + ;; + esac + fi + +case $host_os in + # For platforms that do not support PIC, -DPIC is meaningless: + *djgpp*) + lt_prog_compiler_pic= + ;; + *) + lt_prog_compiler_pic="$lt_prog_compiler_pic -DPIC" + ;; +esac + +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $compiler option to produce PIC" >&5 +$as_echo_n "checking for $compiler option to produce PIC... " >&6; } +if ${lt_cv_prog_compiler_pic+:} false; then : + $as_echo_n "(cached) " >&6 +else + lt_cv_prog_compiler_pic=$lt_prog_compiler_pic +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_pic" >&5 +$as_echo "$lt_cv_prog_compiler_pic" >&6; } +lt_prog_compiler_pic=$lt_cv_prog_compiler_pic + +# +# Check to make sure the PIC flag actually works. +# +if test -n "$lt_prog_compiler_pic"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: checking if $compiler PIC flag $lt_prog_compiler_pic works" >&5 +$as_echo_n "checking if $compiler PIC flag $lt_prog_compiler_pic works... " >&6; } +if ${lt_cv_prog_compiler_pic_works+:} false; then : + $as_echo_n "(cached) " >&6 +else + lt_cv_prog_compiler_pic_works=no + ac_outfile=conftest.$ac_objext + echo "$lt_simple_compile_test_code" > conftest.$ac_ext + lt_compiler_flag="$lt_prog_compiler_pic -DPIC" ## exclude from sc_useless_quotes_in_assignment + # Insert the option either (1) after the last *FLAGS variable, or + # (2) before a word containing "conftest.", or (3) at the end. + # Note that $ac_compile itself does not contain backslashes and begins + # with a dollar sign (not a hyphen), so the echo should work correctly. + # The option is referenced via a variable to avoid confusing sed. + lt_compile=`echo "$ac_compile" | $SED \ + -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \ + -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \ + -e 's:$: $lt_compiler_flag:'` + (eval echo "\"\$as_me:$LINENO: $lt_compile\"" >&5) + (eval "$lt_compile" 2>conftest.err) + ac_status=$? + cat conftest.err >&5 + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + if (exit $ac_status) && test -s "$ac_outfile"; then + # The compiler can only warn and ignore the option if not recognized + # So say no if there are warnings other than the usual output. + $ECHO "$_lt_compiler_boilerplate" | $SED '/^$/d' >conftest.exp + $SED '/^$/d; /^ *+/d' conftest.err >conftest.er2 + if test ! -s conftest.er2 || diff conftest.exp conftest.er2 >/dev/null; then + lt_cv_prog_compiler_pic_works=yes + fi + fi + $RM conftest* + +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_pic_works" >&5 +$as_echo "$lt_cv_prog_compiler_pic_works" >&6; } + +if test yes = "$lt_cv_prog_compiler_pic_works"; then + case $lt_prog_compiler_pic in + "" | " "*) ;; + *) lt_prog_compiler_pic=" $lt_prog_compiler_pic" ;; + esac +else + lt_prog_compiler_pic= + lt_prog_compiler_can_build_shared=no +fi + +fi + + + + + + + + + + + +# +# Check to make sure the static flag actually works. +# +wl=$lt_prog_compiler_wl eval lt_tmp_static_flag=\"$lt_prog_compiler_static\" +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if $compiler static flag $lt_tmp_static_flag works" >&5 +$as_echo_n "checking if $compiler static flag $lt_tmp_static_flag works... " >&6; } +if ${lt_cv_prog_compiler_static_works+:} false; then : + $as_echo_n "(cached) " >&6 +else + lt_cv_prog_compiler_static_works=no + save_LDFLAGS=$LDFLAGS + LDFLAGS="$LDFLAGS $lt_tmp_static_flag" + echo "$lt_simple_link_test_code" > conftest.$ac_ext + if (eval $ac_link 2>conftest.err) && test -s conftest$ac_exeext; then + # The linker can only warn and ignore the option if not recognized + # So say no if there are warnings + if test -s conftest.err; then + # Append any errors to the config.log. + cat conftest.err 1>&5 + $ECHO "$_lt_linker_boilerplate" | $SED '/^$/d' > conftest.exp + $SED '/^$/d; /^ *+/d' conftest.err >conftest.er2 + if diff conftest.exp conftest.er2 >/dev/null; then + lt_cv_prog_compiler_static_works=yes + fi + else + lt_cv_prog_compiler_static_works=yes + fi + fi + $RM -r conftest* + LDFLAGS=$save_LDFLAGS + +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_static_works" >&5 +$as_echo "$lt_cv_prog_compiler_static_works" >&6; } + +if test yes = "$lt_cv_prog_compiler_static_works"; then + : +else + lt_prog_compiler_static= +fi + + + + + + + + { $as_echo "$as_me:${as_lineno-$LINENO}: checking if $compiler supports -c -o file.$ac_objext" >&5 +$as_echo_n "checking if $compiler supports -c -o file.$ac_objext... " >&6; } +if ${lt_cv_prog_compiler_c_o+:} false; then : + $as_echo_n "(cached) " >&6 +else + lt_cv_prog_compiler_c_o=no + $RM -r conftest 2>/dev/null + mkdir conftest + cd conftest + mkdir out + echo "$lt_simple_compile_test_code" > conftest.$ac_ext + + lt_compiler_flag="-o out/conftest2.$ac_objext" + # Insert the option either (1) after the last *FLAGS variable, or + # (2) before a word containing "conftest.", or (3) at the end. + # Note that $ac_compile itself does not contain backslashes and begins + # with a dollar sign (not a hyphen), so the echo should work correctly. + lt_compile=`echo "$ac_compile" | $SED \ + -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \ + -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \ + -e 's:$: $lt_compiler_flag:'` + (eval echo "\"\$as_me:$LINENO: $lt_compile\"" >&5) + (eval "$lt_compile" 2>out/conftest.err) + ac_status=$? + cat out/conftest.err >&5 + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + if (exit $ac_status) && test -s out/conftest2.$ac_objext + then + # The compiler can only warn and ignore the option if not recognized + # So say no if there are warnings + $ECHO "$_lt_compiler_boilerplate" | $SED '/^$/d' > out/conftest.exp + $SED '/^$/d; /^ *+/d' out/conftest.err >out/conftest.er2 + if test ! -s out/conftest.er2 || diff out/conftest.exp out/conftest.er2 >/dev/null; then + lt_cv_prog_compiler_c_o=yes + fi + fi + chmod u+w . 2>&5 + $RM conftest* + # SGI C++ compiler will create directory out/ii_files/ for + # template instantiation + test -d out/ii_files && $RM out/ii_files/* && rmdir out/ii_files + $RM out/* && rmdir out + cd .. + $RM -r conftest + $RM conftest* + +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_c_o" >&5 +$as_echo "$lt_cv_prog_compiler_c_o" >&6; } + + + + + + + { $as_echo "$as_me:${as_lineno-$LINENO}: checking if $compiler supports -c -o file.$ac_objext" >&5 +$as_echo_n "checking if $compiler supports -c -o file.$ac_objext... " >&6; } +if ${lt_cv_prog_compiler_c_o+:} false; then : + $as_echo_n "(cached) " >&6 +else + lt_cv_prog_compiler_c_o=no + $RM -r conftest 2>/dev/null + mkdir conftest + cd conftest + mkdir out + echo "$lt_simple_compile_test_code" > conftest.$ac_ext + + lt_compiler_flag="-o out/conftest2.$ac_objext" + # Insert the option either (1) after the last *FLAGS variable, or + # (2) before a word containing "conftest.", or (3) at the end. + # Note that $ac_compile itself does not contain backslashes and begins + # with a dollar sign (not a hyphen), so the echo should work correctly. + lt_compile=`echo "$ac_compile" | $SED \ + -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \ + -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \ + -e 's:$: $lt_compiler_flag:'` + (eval echo "\"\$as_me:$LINENO: $lt_compile\"" >&5) + (eval "$lt_compile" 2>out/conftest.err) + ac_status=$? + cat out/conftest.err >&5 + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + if (exit $ac_status) && test -s out/conftest2.$ac_objext + then + # The compiler can only warn and ignore the option if not recognized + # So say no if there are warnings + $ECHO "$_lt_compiler_boilerplate" | $SED '/^$/d' > out/conftest.exp + $SED '/^$/d; /^ *+/d' out/conftest.err >out/conftest.er2 + if test ! -s out/conftest.er2 || diff out/conftest.exp out/conftest.er2 >/dev/null; then + lt_cv_prog_compiler_c_o=yes + fi + fi + chmod u+w . 2>&5 + $RM conftest* + # SGI C++ compiler will create directory out/ii_files/ for + # template instantiation + test -d out/ii_files && $RM out/ii_files/* && rmdir out/ii_files + $RM out/* && rmdir out + cd .. + $RM -r conftest + $RM conftest* + +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_c_o" >&5 +$as_echo "$lt_cv_prog_compiler_c_o" >&6; } + + + + +hard_links=nottested +if test no = "$lt_cv_prog_compiler_c_o" && test no != "$need_locks"; then + # do not overwrite the value of need_locks provided by the user + { $as_echo "$as_me:${as_lineno-$LINENO}: checking if we can lock with hard links" >&5 +$as_echo_n "checking if we can lock with hard links... " >&6; } + hard_links=yes + $RM conftest* + ln conftest.a conftest.b 2>/dev/null && hard_links=no + touch conftest.a + ln conftest.a conftest.b 2>&5 || hard_links=no + ln conftest.a conftest.b 2>/dev/null && hard_links=no + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $hard_links" >&5 +$as_echo "$hard_links" >&6; } + if test no = "$hard_links"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: '$CC' does not support '-c -o', so 'make -j' may be unsafe" >&5 +$as_echo "$as_me: WARNING: '$CC' does not support '-c -o', so 'make -j' may be unsafe" >&2;} + need_locks=warn + fi +else + need_locks=no +fi + + + + + + + { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the $compiler linker ($LD) supports shared libraries" >&5 +$as_echo_n "checking whether the $compiler linker ($LD) supports shared libraries... " >&6; } + + runpath_var= + allow_undefined_flag= + always_export_symbols=no + archive_cmds= + archive_expsym_cmds= + compiler_needs_object=no + enable_shared_with_static_runtimes=no + export_dynamic_flag_spec= + export_symbols_cmds='$NM $libobjs $convenience | $global_symbol_pipe | $SED '\''s/.* //'\'' | sort | uniq > $export_symbols' + hardcode_automatic=no + hardcode_direct=no + hardcode_direct_absolute=no + hardcode_libdir_flag_spec= + hardcode_libdir_separator= + hardcode_minus_L=no + hardcode_shlibpath_var=unsupported + inherit_rpath=no + link_all_deplibs=unknown + module_cmds= + module_expsym_cmds= + old_archive_from_new_cmds= + old_archive_from_expsyms_cmds= + thread_safe_flag_spec= + whole_archive_flag_spec= + # include_expsyms should be a list of space-separated symbols to be *always* + # included in the symbol list + include_expsyms= + # exclude_expsyms can be an extended regexp of symbols to exclude + # it will be wrapped by ' (' and ')$', so one must not match beginning or + # end of line. Example: 'a|bc|.*d.*' will exclude the symbols 'a' and 'bc', + # as well as any symbol that contains 'd'. + exclude_expsyms='_GLOBAL_OFFSET_TABLE_|_GLOBAL__F[ID]_.*' + # Although _GLOBAL_OFFSET_TABLE_ is a valid symbol C name, most a.out + # platforms (ab)use it in PIC code, but their linkers get confused if + # the symbol is explicitly referenced. Since portable code cannot + # rely on this symbol name, it's probably fine to never include it in + # preloaded symbol tables. + # Exclude shared library initialization/finalization symbols. + extract_expsyms_cmds= + + case $host_os in + cygwin* | mingw* | pw32* | cegcc*) + # FIXME: the MSVC++ port hasn't been tested in a loooong time + # When not using gcc, we currently assume that we are using + # Microsoft Visual C++. + if test yes != "$GCC"; then + with_gnu_ld=no + fi + ;; + interix*) + # we just hope/assume this is gcc and not c89 (= MSVC++) + with_gnu_ld=yes + ;; + openbsd* | bitrig*) + with_gnu_ld=no + ;; + esac + + ld_shlibs=yes + + # On some targets, GNU ld is compatible enough with the native linker + # that we're better off using the native interface for both. + lt_use_gnu_ld_interface=no + if test yes = "$with_gnu_ld"; then + case $host_os in + aix*) + # The AIX port of GNU ld has always aspired to compatibility + # with the native linker. However, as the warning in the GNU ld + # block says, versions before 2.19.5* couldn't really create working + # shared libraries, regardless of the interface used. + case `$LD -v 2>&1` in + *\ \(GNU\ Binutils\)\ 2.19.5*) ;; + *\ \(GNU\ Binutils\)\ 2.[2-9]*) ;; + *\ \(GNU\ Binutils\)\ [3-9]*) ;; + *) + lt_use_gnu_ld_interface=yes + ;; + esac + ;; + *) + lt_use_gnu_ld_interface=yes + ;; + esac + fi + + if test yes = "$lt_use_gnu_ld_interface"; then + # If archive_cmds runs LD, not CC, wlarc should be empty + wlarc='$wl' + + # Set some defaults for GNU ld with shared library support. These + # are reset later if shared libraries are not supported. Putting them + # here allows them to be overridden if necessary. + runpath_var=LD_RUN_PATH + hardcode_libdir_flag_spec='$wl-rpath $wl$libdir' + export_dynamic_flag_spec='$wl--export-dynamic' + # ancient GNU ld didn't support --whole-archive et. al. + if $LD --help 2>&1 | $GREP 'no-whole-archive' > /dev/null; then + whole_archive_flag_spec=$wlarc'--whole-archive$convenience '$wlarc'--no-whole-archive' + else + whole_archive_flag_spec= + fi + supports_anon_versioning=no + case `$LD -v | $SED -e 's/(^)\+)\s\+//' 2>&1` in + *GNU\ gold*) supports_anon_versioning=yes ;; + *\ [01].* | *\ 2.[0-9].* | *\ 2.10.*) ;; # catch versions < 2.11 + *\ 2.11.93.0.2\ *) supports_anon_versioning=yes ;; # RH7.3 ... + *\ 2.11.92.0.12\ *) supports_anon_versioning=yes ;; # Mandrake 8.2 ... + *\ 2.11.*) ;; # other 2.11 versions + *) supports_anon_versioning=yes ;; + esac + + # See if GNU ld supports shared libraries. + case $host_os in + aix[3-9]*) + # On AIX/PPC, the GNU linker is very broken + if test ia64 != "$host_cpu"; then + ld_shlibs=no + cat <<_LT_EOF 1>&2 + +*** Warning: the GNU linker, at least up to release 2.19, is reported +*** to be unable to reliably create shared libraries on AIX. +*** Therefore, libtool is disabling shared libraries support. If you +*** really care for shared libraries, you may want to install binutils +*** 2.20 or above, or modify your PATH so that a non-GNU linker is found. +*** You will then need to restart the configuration process. + +_LT_EOF + fi + ;; + + amigaos*) + case $host_cpu in + powerpc) + # see comment about AmigaOS4 .so support + archive_cmds='$CC -shared $libobjs $deplibs $compiler_flags $wl-soname $wl$soname -o $lib' + archive_expsym_cmds='' + ;; + m68k) + archive_cmds='$RM $output_objdir/a2ixlibrary.data~$ECHO "#define NAME $libname" > $output_objdir/a2ixlibrary.data~$ECHO "#define LIBRARY_ID 1" >> $output_objdir/a2ixlibrary.data~$ECHO "#define VERSION $major" >> $output_objdir/a2ixlibrary.data~$ECHO "#define REVISION $revision" >> $output_objdir/a2ixlibrary.data~$AR $AR_FLAGS $lib $libobjs~$RANLIB $lib~(cd $output_objdir && a2ixlibrary -32)' + hardcode_libdir_flag_spec='-L$libdir' + hardcode_minus_L=yes + ;; + esac + ;; + + beos*) + if $LD --help 2>&1 | $GREP ': supported targets:.* elf' > /dev/null; then + allow_undefined_flag=unsupported + # Joseph Beckenbach says some releases of gcc + # support --undefined. This deserves some investigation. FIXME + archive_cmds='$CC -nostart $libobjs $deplibs $compiler_flags $wl-soname $wl$soname -o $lib' + else + ld_shlibs=no + fi + ;; + + cygwin* | mingw* | pw32* | cegcc*) + # _LT_TAGVAR(hardcode_libdir_flag_spec, ) is actually meaningless, + # as there is no search path for DLLs. + hardcode_libdir_flag_spec='-L$libdir' + export_dynamic_flag_spec='$wl--export-all-symbols' + allow_undefined_flag=unsupported + always_export_symbols=no + enable_shared_with_static_runtimes=yes + export_symbols_cmds='$NM $libobjs $convenience | $global_symbol_pipe | $SED -e '\''/^[BCDGRS][ ]/s/.*[ ]\([^ ]*\)/\1 DATA/;s/^.*[ ]__nm__\([^ ]*\)[ ][^ ]*/\1 DATA/;/^I[ ]/d;/^[AITW][ ]/s/.* //'\'' | sort | uniq > $export_symbols' + exclude_expsyms='[_]+GLOBAL_OFFSET_TABLE_|[_]+GLOBAL__[FID]_.*|[_]+head_[A-Za-z0-9_]+_dll|[A-Za-z0-9_]+_dll_iname' + + if $LD --help 2>&1 | $GREP 'auto-import' > /dev/null; then + archive_cmds='$CC -shared $libobjs $deplibs $compiler_flags -o $output_objdir/$soname $wl--enable-auto-image-base -Xlinker --out-implib -Xlinker $lib' + # If the export-symbols file already is a .def file, use it as + # is; otherwise, prepend EXPORTS... + archive_expsym_cmds='if test DEF = "`$SED -n -e '\''s/^[ ]*//'\'' -e '\''/^\(;.*\)*$/d'\'' -e '\''s/^\(EXPORTS\|LIBRARY\)\([ ].*\)*$/DEF/p'\'' -e q $export_symbols`" ; then + cp $export_symbols $output_objdir/$soname.def; + else + echo EXPORTS > $output_objdir/$soname.def; + cat $export_symbols >> $output_objdir/$soname.def; + fi~ + $CC -shared $output_objdir/$soname.def $libobjs $deplibs $compiler_flags -o $output_objdir/$soname $wl--enable-auto-image-base -Xlinker --out-implib -Xlinker $lib' + else + ld_shlibs=no + fi + ;; + + haiku*) + archive_cmds='$CC -shared $libobjs $deplibs $compiler_flags $wl-soname $wl$soname -o $lib' + link_all_deplibs=yes + ;; + + os2*) + hardcode_libdir_flag_spec='-L$libdir' + hardcode_minus_L=yes + allow_undefined_flag=unsupported + shrext_cmds=.dll + archive_cmds='$ECHO "LIBRARY ${soname%$shared_ext} INITINSTANCE TERMINSTANCE" > $output_objdir/$libname.def~ + $ECHO "DESCRIPTION \"$libname\"" >> $output_objdir/$libname.def~ + $ECHO "DATA MULTIPLE NONSHARED" >> $output_objdir/$libname.def~ + $ECHO EXPORTS >> $output_objdir/$libname.def~ + emxexp $libobjs | $SED /"_DLL_InitTerm"/d >> $output_objdir/$libname.def~ + $CC -Zdll -Zcrtdll -o $output_objdir/$soname $libobjs $deplibs $compiler_flags $output_objdir/$libname.def~ + emximp -o $lib $output_objdir/$libname.def' + archive_expsym_cmds='$ECHO "LIBRARY ${soname%$shared_ext} INITINSTANCE TERMINSTANCE" > $output_objdir/$libname.def~ + $ECHO "DESCRIPTION \"$libname\"" >> $output_objdir/$libname.def~ + $ECHO "DATA MULTIPLE NONSHARED" >> $output_objdir/$libname.def~ + $ECHO EXPORTS >> $output_objdir/$libname.def~ + prefix_cmds="$SED"~ + if test EXPORTS = "`$SED 1q $export_symbols`"; then + prefix_cmds="$prefix_cmds -e 1d"; + fi~ + prefix_cmds="$prefix_cmds -e \"s/^\(.*\)$/_\1/g\""~ + cat $export_symbols | $prefix_cmds >> $output_objdir/$libname.def~ + $CC -Zdll -Zcrtdll -o $output_objdir/$soname $libobjs $deplibs $compiler_flags $output_objdir/$libname.def~ + emximp -o $lib $output_objdir/$libname.def' + old_archive_From_new_cmds='emximp -o $output_objdir/${libname}_dll.a $output_objdir/$libname.def' + enable_shared_with_static_runtimes=yes + ;; + + interix[3-9]*) + hardcode_direct=no + hardcode_shlibpath_var=no + hardcode_libdir_flag_spec='$wl-rpath,$libdir' + export_dynamic_flag_spec='$wl-E' + # Hack: On Interix 3.x, we cannot compile PIC because of a broken gcc. + # Instead, shared libraries are loaded at an image base (0x10000000 by + # default) and relocated if they conflict, which is a slow very memory + # consuming and fragmenting process. To avoid this, we pick a random, + # 256 KiB-aligned image base between 0x50000000 and 0x6FFC0000 at link + # time. Moving up from 0x10000000 also allows more sbrk(2) space. + archive_cmds='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags $wl-h,$soname $wl--image-base,`expr ${RANDOM-$$} % 4096 / 2 \* 262144 + 1342177280` -o $lib' + archive_expsym_cmds='sed "s|^|_|" $export_symbols >$output_objdir/$soname.expsym~$CC -shared $pic_flag $libobjs $deplibs $compiler_flags $wl-h,$soname $wl--retain-symbols-file,$output_objdir/$soname.expsym $wl--image-base,`expr ${RANDOM-$$} % 4096 / 2 \* 262144 + 1342177280` -o $lib' + ;; + + gnu* | linux* | tpf* | k*bsd*-gnu | kopensolaris*-gnu) + tmp_diet=no + if test linux-dietlibc = "$host_os"; then + case $cc_basename in + diet\ *) tmp_diet=yes;; # linux-dietlibc with static linking (!diet-dyn) + esac + fi + if $LD --help 2>&1 | $EGREP ': supported targets:.* elf' > /dev/null \ + && test no = "$tmp_diet" + then + tmp_addflag=' $pic_flag' + tmp_sharedflag='-shared' + case $cc_basename,$host_cpu in + pgcc*) # Portland Group C compiler + whole_archive_flag_spec='$wl--whole-archive`for conv in $convenience\"\"; do test -n \"$conv\" && new_convenience=\"$new_convenience,$conv\"; done; func_echo_all \"$new_convenience\"` $wl--no-whole-archive' + tmp_addflag=' $pic_flag' + ;; + pgf77* | pgf90* | pgf95* | pgfortran*) + # Portland Group f77 and f90 compilers + whole_archive_flag_spec='$wl--whole-archive`for conv in $convenience\"\"; do test -n \"$conv\" && new_convenience=\"$new_convenience,$conv\"; done; func_echo_all \"$new_convenience\"` $wl--no-whole-archive' + tmp_addflag=' $pic_flag -Mnomain' ;; + ecc*,ia64* | icc*,ia64*) # Intel C compiler on ia64 + tmp_addflag=' -i_dynamic' ;; + efc*,ia64* | ifort*,ia64*) # Intel Fortran compiler on ia64 + tmp_addflag=' -i_dynamic -nofor_main' ;; + ifc* | ifort*) # Intel Fortran compiler + tmp_addflag=' -nofor_main' ;; + lf95*) # Lahey Fortran 8.1 + whole_archive_flag_spec= + tmp_sharedflag='--shared' ;; + nagfor*) # NAGFOR 5.3 + tmp_sharedflag='-Wl,-shared' ;; + xl[cC]* | bgxl[cC]* | mpixl[cC]*) # IBM XL C 8.0 on PPC (deal with xlf below) + tmp_sharedflag='-qmkshrobj' + tmp_addflag= ;; + nvcc*) # Cuda Compiler Driver 2.2 + whole_archive_flag_spec='$wl--whole-archive`for conv in $convenience\"\"; do test -n \"$conv\" && new_convenience=\"$new_convenience,$conv\"; done; func_echo_all \"$new_convenience\"` $wl--no-whole-archive' + compiler_needs_object=yes + ;; + esac + case `$CC -V 2>&1 | sed 5q` in + *Sun\ C*) # Sun C 5.9 + whole_archive_flag_spec='$wl--whole-archive`new_convenience=; for conv in $convenience\"\"; do test -z \"$conv\" || new_convenience=\"$new_convenience,$conv\"; done; func_echo_all \"$new_convenience\"` $wl--no-whole-archive' + compiler_needs_object=yes + tmp_sharedflag='-G' ;; + *Sun\ F*) # Sun Fortran 8.3 + tmp_sharedflag='-G' ;; + esac + archive_cmds='$CC '"$tmp_sharedflag""$tmp_addflag"' $libobjs $deplibs $compiler_flags $wl-soname $wl$soname -o $lib' + + if test yes = "$supports_anon_versioning"; then + archive_expsym_cmds='echo "{ global:" > $output_objdir/$libname.ver~ + cat $export_symbols | sed -e "s/\(.*\)/\1;/" >> $output_objdir/$libname.ver~ + echo "local: *; };" >> $output_objdir/$libname.ver~ + $CC '"$tmp_sharedflag""$tmp_addflag"' $libobjs $deplibs $compiler_flags $wl-soname $wl$soname $wl-version-script $wl$output_objdir/$libname.ver -o $lib' + fi + + case $cc_basename in + tcc*) + export_dynamic_flag_spec='-rdynamic' + ;; + xlf* | bgf* | bgxlf* | mpixlf*) + # IBM XL Fortran 10.1 on PPC cannot create shared libs itself + whole_archive_flag_spec='--whole-archive$convenience --no-whole-archive' + hardcode_libdir_flag_spec='$wl-rpath $wl$libdir' + archive_cmds='$LD -shared $libobjs $deplibs $linker_flags -soname $soname -o $lib' + if test yes = "$supports_anon_versioning"; then + archive_expsym_cmds='echo "{ global:" > $output_objdir/$libname.ver~ + cat $export_symbols | sed -e "s/\(.*\)/\1;/" >> $output_objdir/$libname.ver~ + echo "local: *; };" >> $output_objdir/$libname.ver~ + $LD -shared $libobjs $deplibs $linker_flags -soname $soname -version-script $output_objdir/$libname.ver -o $lib' + fi + ;; + esac + else + ld_shlibs=no + fi + ;; + + netbsd*) + if echo __ELF__ | $CC -E - | $GREP __ELF__ >/dev/null; then + archive_cmds='$LD -Bshareable $libobjs $deplibs $linker_flags -o $lib' + wlarc= + else + archive_cmds='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags $wl-soname $wl$soname -o $lib' + archive_expsym_cmds='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags $wl-soname $wl$soname $wl-retain-symbols-file $wl$export_symbols -o $lib' + fi + ;; + + solaris*) + if $LD -v 2>&1 | $GREP 'BFD 2\.8' > /dev/null; then + ld_shlibs=no + cat <<_LT_EOF 1>&2 + +*** Warning: The releases 2.8.* of the GNU linker cannot reliably +*** create shared libraries on Solaris systems. Therefore, libtool +*** is disabling shared libraries support. We urge you to upgrade GNU +*** binutils to release 2.9.1 or newer. Another option is to modify +*** your PATH or compiler configuration so that the native linker is +*** used, and then restart. + +_LT_EOF + elif $LD --help 2>&1 | $GREP ': supported targets:.* elf' > /dev/null; then + archive_cmds='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags $wl-soname $wl$soname -o $lib' + archive_expsym_cmds='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags $wl-soname $wl$soname $wl-retain-symbols-file $wl$export_symbols -o $lib' + else + ld_shlibs=no + fi + ;; + + sysv5* | sco3.2v5* | sco5v6* | unixware* | OpenUNIX*) + case `$LD -v 2>&1` in + *\ [01].* | *\ 2.[0-9].* | *\ 2.1[0-5].*) + ld_shlibs=no + cat <<_LT_EOF 1>&2 + +*** Warning: Releases of the GNU linker prior to 2.16.91.0.3 cannot +*** reliably create shared libraries on SCO systems. Therefore, libtool +*** is disabling shared libraries support. We urge you to upgrade GNU +*** binutils to release 2.16.91.0.3 or newer. Another option is to modify +*** your PATH or compiler configuration so that the native linker is +*** used, and then restart. + +_LT_EOF + ;; + *) + # For security reasons, it is highly recommended that you always + # use absolute paths for naming shared libraries, and exclude the + # DT_RUNPATH tag from executables and libraries. But doing so + # requires that you compile everything twice, which is a pain. + if $LD --help 2>&1 | $GREP ': supported targets:.* elf' > /dev/null; then + hardcode_libdir_flag_spec='$wl-rpath $wl$libdir' + archive_cmds='$CC -shared $libobjs $deplibs $compiler_flags $wl-soname $wl$soname -o $lib' + archive_expsym_cmds='$CC -shared $libobjs $deplibs $compiler_flags $wl-soname $wl$soname $wl-retain-symbols-file $wl$export_symbols -o $lib' + else + ld_shlibs=no + fi + ;; + esac + ;; + + sunos4*) + archive_cmds='$LD -assert pure-text -Bshareable -o $lib $libobjs $deplibs $linker_flags' + wlarc= + hardcode_direct=yes + hardcode_shlibpath_var=no + ;; + + *) + if $LD --help 2>&1 | $GREP ': supported targets:.* elf' > /dev/null; then + archive_cmds='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags $wl-soname $wl$soname -o $lib' + archive_expsym_cmds='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags $wl-soname $wl$soname $wl-retain-symbols-file $wl$export_symbols -o $lib' + else + ld_shlibs=no + fi + ;; + esac + + if test no = "$ld_shlibs"; then + runpath_var= + hardcode_libdir_flag_spec= + export_dynamic_flag_spec= + whole_archive_flag_spec= + fi + else + # PORTME fill in a description of your system's linker (not GNU ld) + case $host_os in + aix3*) + allow_undefined_flag=unsupported + always_export_symbols=yes + archive_expsym_cmds='$LD -o $output_objdir/$soname $libobjs $deplibs $linker_flags -bE:$export_symbols -T512 -H512 -bM:SRE~$AR $AR_FLAGS $lib $output_objdir/$soname' + # Note: this linker hardcodes the directories in LIBPATH if there + # are no directories specified by -L. + hardcode_minus_L=yes + if test yes = "$GCC" && test -z "$lt_prog_compiler_static"; then + # Neither direct hardcoding nor static linking is supported with a + # broken collect2. + hardcode_direct=unsupported + fi + ;; + + aix[4-9]*) + if test ia64 = "$host_cpu"; then + # On IA64, the linker does run time linking by default, so we don't + # have to do anything special. + aix_use_runtimelinking=no + exp_sym_flag='-Bexport' + no_entry_flag= + else + # If we're using GNU nm, then we don't want the "-C" option. + # -C means demangle to GNU nm, but means don't demangle to AIX nm. + # Without the "-l" option, or with the "-B" option, AIX nm treats + # weak defined symbols like other global defined symbols, whereas + # GNU nm marks them as "W". + # While the 'weak' keyword is ignored in the Export File, we need + # it in the Import File for the 'aix-soname' feature, so we have + # to replace the "-B" option with "-P" for AIX nm. + if $NM -V 2>&1 | $GREP 'GNU' > /dev/null; then + export_symbols_cmds='$NM -Bpg $libobjs $convenience | awk '\''{ if (((\$ 2 == "T") || (\$ 2 == "D") || (\$ 2 == "B") || (\$ 2 == "W")) && (substr(\$ 3,1,1) != ".")) { if (\$ 2 == "W") { print \$ 3 " weak" } else { print \$ 3 } } }'\'' | sort -u > $export_symbols' + else + export_symbols_cmds='`func_echo_all $NM | $SED -e '\''s/B\([^B]*\)$/P\1/'\''` -PCpgl $libobjs $convenience | awk '\''{ if (((\$ 2 == "T") || (\$ 2 == "D") || (\$ 2 == "B") || (\$ 2 == "W") || (\$ 2 == "V") || (\$ 2 == "Z")) && (substr(\$ 1,1,1) != ".")) { if ((\$ 2 == "W") || (\$ 2 == "V") || (\$ 2 == "Z")) { print \$ 1 " weak" } else { print \$ 1 } } }'\'' | sort -u > $export_symbols' + fi + aix_use_runtimelinking=no + + # Test if we are trying to use run time linking or normal + # AIX style linking. If -brtl is somewhere in LDFLAGS, we + # have runtime linking enabled, and use it for executables. + # For shared libraries, we enable/disable runtime linking + # depending on the kind of the shared library created - + # when "with_aix_soname,aix_use_runtimelinking" is: + # "aix,no" lib.a(lib.so.V) shared, rtl:no, for executables + # "aix,yes" lib.so shared, rtl:yes, for executables + # lib.a static archive + # "both,no" lib.so.V(shr.o) shared, rtl:yes + # lib.a(lib.so.V) shared, rtl:no, for executables + # "both,yes" lib.so.V(shr.o) shared, rtl:yes, for executables + # lib.a(lib.so.V) shared, rtl:no + # "svr4,*" lib.so.V(shr.o) shared, rtl:yes, for executables + # lib.a static archive + case $host_os in aix4.[23]|aix4.[23].*|aix[5-9]*) + for ld_flag in $LDFLAGS; do + if (test x-brtl = "x$ld_flag" || test x-Wl,-brtl = "x$ld_flag"); then + aix_use_runtimelinking=yes + break + fi + done + if test svr4,no = "$with_aix_soname,$aix_use_runtimelinking"; then + # With aix-soname=svr4, we create the lib.so.V shared archives only, + # so we don't have lib.a shared libs to link our executables. + # We have to force runtime linking in this case. + aix_use_runtimelinking=yes + LDFLAGS="$LDFLAGS -Wl,-brtl" + fi + ;; + esac + + exp_sym_flag='-bexport' + no_entry_flag='-bnoentry' + fi + + # When large executables or shared objects are built, AIX ld can + # have problems creating the table of contents. If linking a library + # or program results in "error TOC overflow" add -mminimal-toc to + # CXXFLAGS/CFLAGS for g++/gcc. In the cases where that is not + # enough to fix the problem, add -Wl,-bbigtoc to LDFLAGS. + + archive_cmds='' + hardcode_direct=yes + hardcode_direct_absolute=yes + hardcode_libdir_separator=':' + link_all_deplibs=yes + file_list_spec='$wl-f,' + case $with_aix_soname,$aix_use_runtimelinking in + aix,*) ;; # traditional, no import file + svr4,* | *,yes) # use import file + # The Import File defines what to hardcode. + hardcode_direct=no + hardcode_direct_absolute=no + ;; + esac + + if test yes = "$GCC"; then + case $host_os in aix4.[012]|aix4.[012].*) + # We only want to do this on AIX 4.2 and lower, the check + # below for broken collect2 doesn't work under 4.3+ + collect2name=`$CC -print-prog-name=collect2` + if test -f "$collect2name" && + strings "$collect2name" | $GREP resolve_lib_name >/dev/null + then + # We have reworked collect2 + : + else + # We have old collect2 + hardcode_direct=unsupported + # It fails to find uninstalled libraries when the uninstalled + # path is not listed in the libpath. Setting hardcode_minus_L + # to unsupported forces relinking + hardcode_minus_L=yes + hardcode_libdir_flag_spec='-L$libdir' + hardcode_libdir_separator= + fi + ;; + esac + shared_flag='-shared' + if test yes = "$aix_use_runtimelinking"; then + shared_flag="$shared_flag "'$wl-G' + fi + # Need to ensure runtime linking is disabled for the traditional + # shared library, or the linker may eventually find shared libraries + # /with/ Import File - we do not want to mix them. + shared_flag_aix='-shared' + shared_flag_svr4='-shared $wl-G' + else + # not using gcc + if test ia64 = "$host_cpu"; then + # VisualAge C++, Version 5.5 for AIX 5L for IA-64, Beta 3 Release + # chokes on -Wl,-G. The following line is correct: + shared_flag='-G' + else + if test yes = "$aix_use_runtimelinking"; then + shared_flag='$wl-G' + else + shared_flag='$wl-bM:SRE' + fi + shared_flag_aix='$wl-bM:SRE' + shared_flag_svr4='$wl-G' + fi + fi + + export_dynamic_flag_spec='$wl-bexpall' + # It seems that -bexpall does not export symbols beginning with + # underscore (_), so it is better to generate a list of symbols to export. + always_export_symbols=yes + if test aix,yes = "$with_aix_soname,$aix_use_runtimelinking"; then + # Warning - without using the other runtime loading flags (-brtl), + # -berok will link without error, but may produce a broken library. + allow_undefined_flag='-berok' + # Determine the default libpath from the value encoded in an + # empty executable. + if test set = "${lt_cv_aix_libpath+set}"; then + aix_libpath=$lt_cv_aix_libpath +else + if ${lt_cv_aix_libpath_+:} false; then : + $as_echo_n "(cached) " >&6 +else + cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ + +int +main () +{ + + ; + return 0; +} +_ACEOF +if ac_fn_c_try_link "$LINENO"; then : + + lt_aix_libpath_sed=' + /Import File Strings/,/^$/ { + /^0/ { + s/^0 *\([^ ]*\) *$/\1/ + p + } + }' + lt_cv_aix_libpath_=`dump -H conftest$ac_exeext 2>/dev/null | $SED -n -e "$lt_aix_libpath_sed"` + # Check for a 64-bit object if we didn't find anything. + if test -z "$lt_cv_aix_libpath_"; then + lt_cv_aix_libpath_=`dump -HX64 conftest$ac_exeext 2>/dev/null | $SED -n -e "$lt_aix_libpath_sed"` + fi +fi +rm -f core conftest.err conftest.$ac_objext \ + conftest$ac_exeext conftest.$ac_ext + if test -z "$lt_cv_aix_libpath_"; then + lt_cv_aix_libpath_=/usr/lib:/lib + fi + +fi + + aix_libpath=$lt_cv_aix_libpath_ +fi + + hardcode_libdir_flag_spec='$wl-blibpath:$libdir:'"$aix_libpath" + archive_expsym_cmds='$CC -o $output_objdir/$soname $libobjs $deplibs $wl'$no_entry_flag' $compiler_flags `if test -n "$allow_undefined_flag"; then func_echo_all "$wl$allow_undefined_flag"; else :; fi` $wl'$exp_sym_flag:\$export_symbols' '$shared_flag + else + if test ia64 = "$host_cpu"; then + hardcode_libdir_flag_spec='$wl-R $libdir:/usr/lib:/lib' + allow_undefined_flag="-z nodefs" + archive_expsym_cmds="\$CC $shared_flag"' -o $output_objdir/$soname $libobjs $deplibs '"\$wl$no_entry_flag"' $compiler_flags $wl$allow_undefined_flag '"\$wl$exp_sym_flag:\$export_symbols" + else + # Determine the default libpath from the value encoded in an + # empty executable. + if test set = "${lt_cv_aix_libpath+set}"; then + aix_libpath=$lt_cv_aix_libpath +else + if ${lt_cv_aix_libpath_+:} false; then : + $as_echo_n "(cached) " >&6 +else + cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ + +int +main () +{ + + ; + return 0; +} +_ACEOF +if ac_fn_c_try_link "$LINENO"; then : + + lt_aix_libpath_sed=' + /Import File Strings/,/^$/ { + /^0/ { + s/^0 *\([^ ]*\) *$/\1/ + p + } + }' + lt_cv_aix_libpath_=`dump -H conftest$ac_exeext 2>/dev/null | $SED -n -e "$lt_aix_libpath_sed"` + # Check for a 64-bit object if we didn't find anything. + if test -z "$lt_cv_aix_libpath_"; then + lt_cv_aix_libpath_=`dump -HX64 conftest$ac_exeext 2>/dev/null | $SED -n -e "$lt_aix_libpath_sed"` + fi +fi +rm -f core conftest.err conftest.$ac_objext \ + conftest$ac_exeext conftest.$ac_ext + if test -z "$lt_cv_aix_libpath_"; then + lt_cv_aix_libpath_=/usr/lib:/lib + fi + +fi + + aix_libpath=$lt_cv_aix_libpath_ +fi + + hardcode_libdir_flag_spec='$wl-blibpath:$libdir:'"$aix_libpath" + # Warning - without using the other run time loading flags, + # -berok will link without error, but may produce a broken library. + no_undefined_flag=' $wl-bernotok' + allow_undefined_flag=' $wl-berok' + if test yes = "$with_gnu_ld"; then + # We only use this code for GNU lds that support --whole-archive. + whole_archive_flag_spec='$wl--whole-archive$convenience $wl--no-whole-archive' + else + # Exported symbols can be pulled into shared objects from archives + whole_archive_flag_spec='$convenience' + fi + archive_cmds_need_lc=yes + archive_expsym_cmds='$RM -r $output_objdir/$realname.d~$MKDIR $output_objdir/$realname.d' + # -brtl affects multiple linker settings, -berok does not and is overridden later + compiler_flags_filtered='`func_echo_all "$compiler_flags " | $SED -e "s%-brtl\\([, ]\\)%-berok\\1%g"`' + if test svr4 != "$with_aix_soname"; then + # This is similar to how AIX traditionally builds its shared libraries. + archive_expsym_cmds="$archive_expsym_cmds"'~$CC '$shared_flag_aix' -o $output_objdir/$realname.d/$soname $libobjs $deplibs $wl-bnoentry '$compiler_flags_filtered'$wl-bE:$export_symbols$allow_undefined_flag~$AR $AR_FLAGS $output_objdir/$libname$release.a $output_objdir/$realname.d/$soname' + fi + if test aix != "$with_aix_soname"; then + archive_expsym_cmds="$archive_expsym_cmds"'~$CC '$shared_flag_svr4' -o $output_objdir/$realname.d/$shared_archive_member_spec.o $libobjs $deplibs $wl-bnoentry '$compiler_flags_filtered'$wl-bE:$export_symbols$allow_undefined_flag~$STRIP -e $output_objdir/$realname.d/$shared_archive_member_spec.o~( func_echo_all "#! $soname($shared_archive_member_spec.o)"; if test shr_64 = "$shared_archive_member_spec"; then func_echo_all "# 64"; else func_echo_all "# 32"; fi; cat $export_symbols ) > $output_objdir/$realname.d/$shared_archive_member_spec.imp~$AR $AR_FLAGS $output_objdir/$soname $output_objdir/$realname.d/$shared_archive_member_spec.o $output_objdir/$realname.d/$shared_archive_member_spec.imp' + else + # used by -dlpreopen to get the symbols + archive_expsym_cmds="$archive_expsym_cmds"'~$MV $output_objdir/$realname.d/$soname $output_objdir' + fi + archive_expsym_cmds="$archive_expsym_cmds"'~$RM -r $output_objdir/$realname.d' + fi + fi + ;; + + amigaos*) + case $host_cpu in + powerpc) + # see comment about AmigaOS4 .so support + archive_cmds='$CC -shared $libobjs $deplibs $compiler_flags $wl-soname $wl$soname -o $lib' + archive_expsym_cmds='' + ;; + m68k) + archive_cmds='$RM $output_objdir/a2ixlibrary.data~$ECHO "#define NAME $libname" > $output_objdir/a2ixlibrary.data~$ECHO "#define LIBRARY_ID 1" >> $output_objdir/a2ixlibrary.data~$ECHO "#define VERSION $major" >> $output_objdir/a2ixlibrary.data~$ECHO "#define REVISION $revision" >> $output_objdir/a2ixlibrary.data~$AR $AR_FLAGS $lib $libobjs~$RANLIB $lib~(cd $output_objdir && a2ixlibrary -32)' + hardcode_libdir_flag_spec='-L$libdir' + hardcode_minus_L=yes + ;; + esac + ;; + + bsdi[45]*) + export_dynamic_flag_spec=-rdynamic + ;; + + cygwin* | mingw* | pw32* | cegcc*) + # When not using gcc, we currently assume that we are using + # Microsoft Visual C++. + # hardcode_libdir_flag_spec is actually meaningless, as there is + # no search path for DLLs. + case $cc_basename in + cl*) + # Native MSVC + hardcode_libdir_flag_spec=' ' + allow_undefined_flag=unsupported + always_export_symbols=yes + file_list_spec='@' + # Tell ltmain to make .lib files, not .a files. + libext=lib + # Tell ltmain to make .dll files, not .so files. + shrext_cmds=.dll + # FIXME: Setting linknames here is a bad hack. + archive_cmds='$CC -o $output_objdir/$soname $libobjs $compiler_flags $deplibs -Wl,-DLL,-IMPLIB:"$tool_output_objdir$libname.dll.lib"~linknames=' + archive_expsym_cmds='if test DEF = "`$SED -n -e '\''s/^[ ]*//'\'' -e '\''/^\(;.*\)*$/d'\'' -e '\''s/^\(EXPORTS\|LIBRARY\)\([ ].*\)*$/DEF/p'\'' -e q $export_symbols`" ; then + cp "$export_symbols" "$output_objdir/$soname.def"; + echo "$tool_output_objdir$soname.def" > "$output_objdir/$soname.exp"; + else + $SED -e '\''s/^/-link -EXPORT:/'\'' < $export_symbols > $output_objdir/$soname.exp; + fi~ + $CC -o $tool_output_objdir$soname $libobjs $compiler_flags $deplibs "@$tool_output_objdir$soname.exp" -Wl,-DLL,-IMPLIB:"$tool_output_objdir$libname.dll.lib"~ + linknames=' + # The linker will not automatically build a static lib if we build a DLL. + # _LT_TAGVAR(old_archive_from_new_cmds, )='true' + enable_shared_with_static_runtimes=yes + exclude_expsyms='_NULL_IMPORT_DESCRIPTOR|_IMPORT_DESCRIPTOR_.*' + export_symbols_cmds='$NM $libobjs $convenience | $global_symbol_pipe | $SED -e '\''/^[BCDGRS][ ]/s/.*[ ]\([^ ]*\)/\1,DATA/'\'' | $SED -e '\''/^[AITW][ ]/s/.*[ ]//'\'' | sort | uniq > $export_symbols' + # Don't use ranlib + old_postinstall_cmds='chmod 644 $oldlib' + postlink_cmds='lt_outputfile="@OUTPUT@"~ + lt_tool_outputfile="@TOOL_OUTPUT@"~ + case $lt_outputfile in + *.exe|*.EXE) ;; + *) + lt_outputfile=$lt_outputfile.exe + lt_tool_outputfile=$lt_tool_outputfile.exe + ;; + esac~ + if test : != "$MANIFEST_TOOL" && test -f "$lt_outputfile.manifest"; then + $MANIFEST_TOOL -manifest "$lt_tool_outputfile.manifest" -outputresource:"$lt_tool_outputfile" || exit 1; + $RM "$lt_outputfile.manifest"; + fi' + ;; + *) + # Assume MSVC wrapper + hardcode_libdir_flag_spec=' ' + allow_undefined_flag=unsupported + # Tell ltmain to make .lib files, not .a files. + libext=lib + # Tell ltmain to make .dll files, not .so files. + shrext_cmds=.dll + # FIXME: Setting linknames here is a bad hack. + archive_cmds='$CC -o $lib $libobjs $compiler_flags `func_echo_all "$deplibs" | $SED '\''s/ -lc$//'\''` -link -dll~linknames=' + # The linker will automatically build a .lib file if we build a DLL. + old_archive_from_new_cmds='true' + # FIXME: Should let the user specify the lib program. + old_archive_cmds='lib -OUT:$oldlib$oldobjs$old_deplibs' + enable_shared_with_static_runtimes=yes + ;; + esac + ;; + + darwin* | rhapsody*) + + + archive_cmds_need_lc=no + hardcode_direct=no + hardcode_automatic=yes + hardcode_shlibpath_var=unsupported + if test yes = "$lt_cv_ld_force_load"; then + whole_archive_flag_spec='`for conv in $convenience\"\"; do test -n \"$conv\" && new_convenience=\"$new_convenience $wl-force_load,$conv\"; done; func_echo_all \"$new_convenience\"`' + + else + whole_archive_flag_spec='' + fi + link_all_deplibs=yes + allow_undefined_flag=$_lt_dar_allow_undefined + case $cc_basename in + ifort*|nagfor*) _lt_dar_can_shared=yes ;; + *) _lt_dar_can_shared=$GCC ;; + esac + if test yes = "$_lt_dar_can_shared"; then + output_verbose_link_cmd=func_echo_all + archive_cmds="\$CC -dynamiclib \$allow_undefined_flag -o \$lib \$libobjs \$deplibs \$compiler_flags -install_name \$rpath/\$soname \$verstring $_lt_dar_single_mod$_lt_dsymutil" + module_cmds="\$CC \$allow_undefined_flag -o \$lib -bundle \$libobjs \$deplibs \$compiler_flags$_lt_dsymutil" + archive_expsym_cmds="sed 's|^|_|' < \$export_symbols > \$output_objdir/\$libname-symbols.expsym~\$CC -dynamiclib \$allow_undefined_flag -o \$lib \$libobjs \$deplibs \$compiler_flags -install_name \$rpath/\$soname \$verstring $_lt_dar_single_mod$_lt_dar_export_syms$_lt_dsymutil" + module_expsym_cmds="sed -e 's|^|_|' < \$export_symbols > \$output_objdir/\$libname-symbols.expsym~\$CC \$allow_undefined_flag -o \$lib -bundle \$libobjs \$deplibs \$compiler_flags$_lt_dar_export_syms$_lt_dsymutil" + + else + ld_shlibs=no + fi + + ;; + + dgux*) + archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags' + hardcode_libdir_flag_spec='-L$libdir' + hardcode_shlibpath_var=no + ;; + + # FreeBSD 2.2.[012] allows us to include c++rt0.o to get C++ constructor + # support. Future versions do this automatically, but an explicit c++rt0.o + # does not break anything, and helps significantly (at the cost of a little + # extra space). + freebsd2.2*) + archive_cmds='$LD -Bshareable -o $lib $libobjs $deplibs $linker_flags /usr/lib/c++rt0.o' + hardcode_libdir_flag_spec='-R$libdir' + hardcode_direct=yes + hardcode_shlibpath_var=no + ;; + + # Unfortunately, older versions of FreeBSD 2 do not have this feature. + freebsd2.*) + archive_cmds='$LD -Bshareable -o $lib $libobjs $deplibs $linker_flags' + hardcode_direct=yes + hardcode_minus_L=yes + hardcode_shlibpath_var=no + ;; + + # FreeBSD 3 and greater uses gcc -shared to do shared libraries. + freebsd* | dragonfly*) + archive_cmds='$CC -shared $pic_flag -o $lib $libobjs $deplibs $compiler_flags' + hardcode_libdir_flag_spec='-R$libdir' + hardcode_direct=yes + hardcode_shlibpath_var=no + ;; + + hpux9*) + if test yes = "$GCC"; then + archive_cmds='$RM $output_objdir/$soname~$CC -shared $pic_flag $wl+b $wl$install_libdir -o $output_objdir/$soname $libobjs $deplibs $compiler_flags~test "x$output_objdir/$soname" = "x$lib" || mv $output_objdir/$soname $lib' + else + archive_cmds='$RM $output_objdir/$soname~$LD -b +b $install_libdir -o $output_objdir/$soname $libobjs $deplibs $linker_flags~test "x$output_objdir/$soname" = "x$lib" || mv $output_objdir/$soname $lib' + fi + hardcode_libdir_flag_spec='$wl+b $wl$libdir' + hardcode_libdir_separator=: + hardcode_direct=yes + + # hardcode_minus_L: Not really in the search PATH, + # but as the default location of the library. + hardcode_minus_L=yes + export_dynamic_flag_spec='$wl-E' + ;; + + hpux10*) + if test yes,no = "$GCC,$with_gnu_ld"; then + archive_cmds='$CC -shared $pic_flag $wl+h $wl$soname $wl+b $wl$install_libdir -o $lib $libobjs $deplibs $compiler_flags' + else + archive_cmds='$LD -b +h $soname +b $install_libdir -o $lib $libobjs $deplibs $linker_flags' + fi + if test no = "$with_gnu_ld"; then + hardcode_libdir_flag_spec='$wl+b $wl$libdir' + hardcode_libdir_separator=: + hardcode_direct=yes + hardcode_direct_absolute=yes + export_dynamic_flag_spec='$wl-E' + # hardcode_minus_L: Not really in the search PATH, + # but as the default location of the library. + hardcode_minus_L=yes + fi + ;; + + hpux11*) + if test yes,no = "$GCC,$with_gnu_ld"; then + case $host_cpu in + hppa*64*) + archive_cmds='$CC -shared $wl+h $wl$soname -o $lib $libobjs $deplibs $compiler_flags' + ;; + ia64*) + archive_cmds='$CC -shared $pic_flag $wl+h $wl$soname $wl+nodefaultrpath -o $lib $libobjs $deplibs $compiler_flags' + ;; + *) + archive_cmds='$CC -shared $pic_flag $wl+h $wl$soname $wl+b $wl$install_libdir -o $lib $libobjs $deplibs $compiler_flags' + ;; + esac + else + case $host_cpu in + hppa*64*) + archive_cmds='$CC -b $wl+h $wl$soname -o $lib $libobjs $deplibs $compiler_flags' + ;; + ia64*) + archive_cmds='$CC -b $wl+h $wl$soname $wl+nodefaultrpath -o $lib $libobjs $deplibs $compiler_flags' + ;; + *) + + # Older versions of the 11.00 compiler do not understand -b yet + # (HP92453-01 A.11.01.20 doesn't, HP92453-01 B.11.X.35175-35176.GP does) + { $as_echo "$as_me:${as_lineno-$LINENO}: checking if $CC understands -b" >&5 +$as_echo_n "checking if $CC understands -b... " >&6; } +if ${lt_cv_prog_compiler__b+:} false; then : + $as_echo_n "(cached) " >&6 +else + lt_cv_prog_compiler__b=no + save_LDFLAGS=$LDFLAGS + LDFLAGS="$LDFLAGS -b" + echo "$lt_simple_link_test_code" > conftest.$ac_ext + if (eval $ac_link 2>conftest.err) && test -s conftest$ac_exeext; then + # The linker can only warn and ignore the option if not recognized + # So say no if there are warnings + if test -s conftest.err; then + # Append any errors to the config.log. + cat conftest.err 1>&5 + $ECHO "$_lt_linker_boilerplate" | $SED '/^$/d' > conftest.exp + $SED '/^$/d; /^ *+/d' conftest.err >conftest.er2 + if diff conftest.exp conftest.er2 >/dev/null; then + lt_cv_prog_compiler__b=yes + fi + else + lt_cv_prog_compiler__b=yes + fi + fi + $RM -r conftest* + LDFLAGS=$save_LDFLAGS + +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler__b" >&5 +$as_echo "$lt_cv_prog_compiler__b" >&6; } + +if test yes = "$lt_cv_prog_compiler__b"; then + archive_cmds='$CC -b $wl+h $wl$soname $wl+b $wl$install_libdir -o $lib $libobjs $deplibs $compiler_flags' +else + archive_cmds='$LD -b +h $soname +b $install_libdir -o $lib $libobjs $deplibs $linker_flags' +fi + + ;; + esac + fi + if test no = "$with_gnu_ld"; then + hardcode_libdir_flag_spec='$wl+b $wl$libdir' + hardcode_libdir_separator=: + + case $host_cpu in + hppa*64*|ia64*) + hardcode_direct=no + hardcode_shlibpath_var=no + ;; + *) + hardcode_direct=yes + hardcode_direct_absolute=yes + export_dynamic_flag_spec='$wl-E' + + # hardcode_minus_L: Not really in the search PATH, + # but as the default location of the library. + hardcode_minus_L=yes + ;; + esac + fi + ;; + + irix5* | irix6* | nonstopux*) + if test yes = "$GCC"; then + archive_cmds='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags $wl-soname $wl$soname `test -n "$verstring" && func_echo_all "$wl-set_version $wl$verstring"` $wl-update_registry $wl$output_objdir/so_locations -o $lib' + # Try to use the -exported_symbol ld option, if it does not + # work, assume that -exports_file does not work either and + # implicitly export all symbols. + # This should be the same for all languages, so no per-tag cache variable. + { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the $host_os linker accepts -exported_symbol" >&5 +$as_echo_n "checking whether the $host_os linker accepts -exported_symbol... " >&6; } +if ${lt_cv_irix_exported_symbol+:} false; then : + $as_echo_n "(cached) " >&6 +else + save_LDFLAGS=$LDFLAGS + LDFLAGS="$LDFLAGS -shared $wl-exported_symbol ${wl}foo $wl-update_registry $wl/dev/null" + cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ +int foo (void) { return 0; } +_ACEOF +if ac_fn_c_try_link "$LINENO"; then : + lt_cv_irix_exported_symbol=yes +else + lt_cv_irix_exported_symbol=no +fi +rm -f core conftest.err conftest.$ac_objext \ + conftest$ac_exeext conftest.$ac_ext + LDFLAGS=$save_LDFLAGS +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_irix_exported_symbol" >&5 +$as_echo "$lt_cv_irix_exported_symbol" >&6; } + if test yes = "$lt_cv_irix_exported_symbol"; then + archive_expsym_cmds='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags $wl-soname $wl$soname `test -n "$verstring" && func_echo_all "$wl-set_version $wl$verstring"` $wl-update_registry $wl$output_objdir/so_locations $wl-exports_file $wl$export_symbols -o $lib' + fi + else + archive_cmds='$CC -shared $libobjs $deplibs $compiler_flags -soname $soname `test -n "$verstring" && func_echo_all "-set_version $verstring"` -update_registry $output_objdir/so_locations -o $lib' + archive_expsym_cmds='$CC -shared $libobjs $deplibs $compiler_flags -soname $soname `test -n "$verstring" && func_echo_all "-set_version $verstring"` -update_registry $output_objdir/so_locations -exports_file $export_symbols -o $lib' + fi + archive_cmds_need_lc='no' + hardcode_libdir_flag_spec='$wl-rpath $wl$libdir' + hardcode_libdir_separator=: + inherit_rpath=yes + link_all_deplibs=yes + ;; + + linux*) + case $cc_basename in + tcc*) + # Fabrice Bellard et al's Tiny C Compiler + ld_shlibs=yes + archive_cmds='$CC -shared $pic_flag -o $lib $libobjs $deplibs $compiler_flags' + ;; + esac + ;; + + netbsd*) + if echo __ELF__ | $CC -E - | $GREP __ELF__ >/dev/null; then + archive_cmds='$LD -Bshareable -o $lib $libobjs $deplibs $linker_flags' # a.out + else + archive_cmds='$LD -shared -o $lib $libobjs $deplibs $linker_flags' # ELF + fi + hardcode_libdir_flag_spec='-R$libdir' + hardcode_direct=yes + hardcode_shlibpath_var=no + ;; + + newsos6) + archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags' + hardcode_direct=yes + hardcode_libdir_flag_spec='$wl-rpath $wl$libdir' + hardcode_libdir_separator=: + hardcode_shlibpath_var=no + ;; + + *nto* | *qnx*) + ;; + + openbsd* | bitrig*) + if test -f /usr/libexec/ld.so; then + hardcode_direct=yes + hardcode_shlibpath_var=no + hardcode_direct_absolute=yes + if test -z "`echo __ELF__ | $CC -E - | $GREP __ELF__`"; then + archive_cmds='$CC -shared $pic_flag -o $lib $libobjs $deplibs $compiler_flags' + archive_expsym_cmds='$CC -shared $pic_flag -o $lib $libobjs $deplibs $compiler_flags $wl-retain-symbols-file,$export_symbols' + hardcode_libdir_flag_spec='$wl-rpath,$libdir' + export_dynamic_flag_spec='$wl-E' + else + archive_cmds='$CC -shared $pic_flag -o $lib $libobjs $deplibs $compiler_flags' + hardcode_libdir_flag_spec='$wl-rpath,$libdir' + fi + else + ld_shlibs=no + fi + ;; + + os2*) + hardcode_libdir_flag_spec='-L$libdir' + hardcode_minus_L=yes + allow_undefined_flag=unsupported + shrext_cmds=.dll + archive_cmds='$ECHO "LIBRARY ${soname%$shared_ext} INITINSTANCE TERMINSTANCE" > $output_objdir/$libname.def~ + $ECHO "DESCRIPTION \"$libname\"" >> $output_objdir/$libname.def~ + $ECHO "DATA MULTIPLE NONSHARED" >> $output_objdir/$libname.def~ + $ECHO EXPORTS >> $output_objdir/$libname.def~ + emxexp $libobjs | $SED /"_DLL_InitTerm"/d >> $output_objdir/$libname.def~ + $CC -Zdll -Zcrtdll -o $output_objdir/$soname $libobjs $deplibs $compiler_flags $output_objdir/$libname.def~ + emximp -o $lib $output_objdir/$libname.def' + archive_expsym_cmds='$ECHO "LIBRARY ${soname%$shared_ext} INITINSTANCE TERMINSTANCE" > $output_objdir/$libname.def~ + $ECHO "DESCRIPTION \"$libname\"" >> $output_objdir/$libname.def~ + $ECHO "DATA MULTIPLE NONSHARED" >> $output_objdir/$libname.def~ + $ECHO EXPORTS >> $output_objdir/$libname.def~ + prefix_cmds="$SED"~ + if test EXPORTS = "`$SED 1q $export_symbols`"; then + prefix_cmds="$prefix_cmds -e 1d"; + fi~ + prefix_cmds="$prefix_cmds -e \"s/^\(.*\)$/_\1/g\""~ + cat $export_symbols | $prefix_cmds >> $output_objdir/$libname.def~ + $CC -Zdll -Zcrtdll -o $output_objdir/$soname $libobjs $deplibs $compiler_flags $output_objdir/$libname.def~ + emximp -o $lib $output_objdir/$libname.def' + old_archive_From_new_cmds='emximp -o $output_objdir/${libname}_dll.a $output_objdir/$libname.def' + enable_shared_with_static_runtimes=yes + ;; + + osf3*) + if test yes = "$GCC"; then + allow_undefined_flag=' $wl-expect_unresolved $wl\*' + archive_cmds='$CC -shared$allow_undefined_flag $libobjs $deplibs $compiler_flags $wl-soname $wl$soname `test -n "$verstring" && func_echo_all "$wl-set_version $wl$verstring"` $wl-update_registry $wl$output_objdir/so_locations -o $lib' + else + allow_undefined_flag=' -expect_unresolved \*' + archive_cmds='$CC -shared$allow_undefined_flag $libobjs $deplibs $compiler_flags -soname $soname `test -n "$verstring" && func_echo_all "-set_version $verstring"` -update_registry $output_objdir/so_locations -o $lib' + fi + archive_cmds_need_lc='no' + hardcode_libdir_flag_spec='$wl-rpath $wl$libdir' + hardcode_libdir_separator=: + ;; + + osf4* | osf5*) # as osf3* with the addition of -msym flag + if test yes = "$GCC"; then + allow_undefined_flag=' $wl-expect_unresolved $wl\*' + archive_cmds='$CC -shared$allow_undefined_flag $pic_flag $libobjs $deplibs $compiler_flags $wl-msym $wl-soname $wl$soname `test -n "$verstring" && func_echo_all "$wl-set_version $wl$verstring"` $wl-update_registry $wl$output_objdir/so_locations -o $lib' + hardcode_libdir_flag_spec='$wl-rpath $wl$libdir' + else + allow_undefined_flag=' -expect_unresolved \*' + archive_cmds='$CC -shared$allow_undefined_flag $libobjs $deplibs $compiler_flags -msym -soname $soname `test -n "$verstring" && func_echo_all "-set_version $verstring"` -update_registry $output_objdir/so_locations -o $lib' + archive_expsym_cmds='for i in `cat $export_symbols`; do printf "%s %s\\n" -exported_symbol "\$i" >> $lib.exp; done; printf "%s\\n" "-hidden">> $lib.exp~ + $CC -shared$allow_undefined_flag $wl-input $wl$lib.exp $compiler_flags $libobjs $deplibs -soname $soname `test -n "$verstring" && $ECHO "-set_version $verstring"` -update_registry $output_objdir/so_locations -o $lib~$RM $lib.exp' + + # Both c and cxx compiler support -rpath directly + hardcode_libdir_flag_spec='-rpath $libdir' + fi + archive_cmds_need_lc='no' + hardcode_libdir_separator=: + ;; + + solaris*) + no_undefined_flag=' -z defs' + if test yes = "$GCC"; then + wlarc='$wl' + archive_cmds='$CC -shared $pic_flag $wl-z ${wl}text $wl-h $wl$soname -o $lib $libobjs $deplibs $compiler_flags' + archive_expsym_cmds='echo "{ global:" > $lib.exp~cat $export_symbols | $SED -e "s/\(.*\)/\1;/" >> $lib.exp~echo "local: *; };" >> $lib.exp~ + $CC -shared $pic_flag $wl-z ${wl}text $wl-M $wl$lib.exp $wl-h $wl$soname -o $lib $libobjs $deplibs $compiler_flags~$RM $lib.exp' + else + case `$CC -V 2>&1` in + *"Compilers 5.0"*) + wlarc='' + archive_cmds='$LD -G$allow_undefined_flag -h $soname -o $lib $libobjs $deplibs $linker_flags' + archive_expsym_cmds='echo "{ global:" > $lib.exp~cat $export_symbols | $SED -e "s/\(.*\)/\1;/" >> $lib.exp~echo "local: *; };" >> $lib.exp~ + $LD -G$allow_undefined_flag -M $lib.exp -h $soname -o $lib $libobjs $deplibs $linker_flags~$RM $lib.exp' + ;; + *) + wlarc='$wl' + archive_cmds='$CC -G$allow_undefined_flag -h $soname -o $lib $libobjs $deplibs $compiler_flags' + archive_expsym_cmds='echo "{ global:" > $lib.exp~cat $export_symbols | $SED -e "s/\(.*\)/\1;/" >> $lib.exp~echo "local: *; };" >> $lib.exp~ + $CC -G$allow_undefined_flag -M $lib.exp -h $soname -o $lib $libobjs $deplibs $compiler_flags~$RM $lib.exp' + ;; + esac + fi + hardcode_libdir_flag_spec='-R$libdir' + hardcode_shlibpath_var=no + case $host_os in + solaris2.[0-5] | solaris2.[0-5].*) ;; + *) + # The compiler driver will combine and reorder linker options, + # but understands '-z linker_flag'. GCC discards it without '$wl', + # but is careful enough not to reorder. + # Supported since Solaris 2.6 (maybe 2.5.1?) + if test yes = "$GCC"; then + whole_archive_flag_spec='$wl-z ${wl}allextract$convenience $wl-z ${wl}defaultextract' + else + whole_archive_flag_spec='-z allextract$convenience -z defaultextract' + fi + ;; + esac + link_all_deplibs=yes + ;; + + sunos4*) + if test sequent = "$host_vendor"; then + # Use $CC to link under sequent, because it throws in some extra .o + # files that make .init and .fini sections work. + archive_cmds='$CC -G $wl-h $soname -o $lib $libobjs $deplibs $compiler_flags' + else + archive_cmds='$LD -assert pure-text -Bstatic -o $lib $libobjs $deplibs $linker_flags' + fi + hardcode_libdir_flag_spec='-L$libdir' + hardcode_direct=yes + hardcode_minus_L=yes + hardcode_shlibpath_var=no + ;; + + sysv4) + case $host_vendor in + sni) + archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags' + hardcode_direct=yes # is this really true??? + ;; + siemens) + ## LD is ld it makes a PLAMLIB + ## CC just makes a GrossModule. + archive_cmds='$LD -G -o $lib $libobjs $deplibs $linker_flags' + reload_cmds='$CC -r -o $output$reload_objs' + hardcode_direct=no + ;; + motorola) + archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags' + hardcode_direct=no #Motorola manual says yes, but my tests say they lie + ;; + esac + runpath_var='LD_RUN_PATH' + hardcode_shlibpath_var=no + ;; + + sysv4.3*) + archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags' + hardcode_shlibpath_var=no + export_dynamic_flag_spec='-Bexport' + ;; + + sysv4*MP*) + if test -d /usr/nec; then + archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags' + hardcode_shlibpath_var=no + runpath_var=LD_RUN_PATH + hardcode_runpath_var=yes + ld_shlibs=yes + fi + ;; + + sysv4*uw2* | sysv5OpenUNIX* | sysv5UnixWare7.[01].[10]* | unixware7* | sco3.2v5.0.[024]*) + no_undefined_flag='$wl-z,text' + archive_cmds_need_lc=no + hardcode_shlibpath_var=no + runpath_var='LD_RUN_PATH' + + if test yes = "$GCC"; then + archive_cmds='$CC -shared $wl-h,$soname -o $lib $libobjs $deplibs $compiler_flags' + archive_expsym_cmds='$CC -shared $wl-Bexport:$export_symbols $wl-h,$soname -o $lib $libobjs $deplibs $compiler_flags' + else + archive_cmds='$CC -G $wl-h,$soname -o $lib $libobjs $deplibs $compiler_flags' + archive_expsym_cmds='$CC -G $wl-Bexport:$export_symbols $wl-h,$soname -o $lib $libobjs $deplibs $compiler_flags' + fi + ;; + + sysv5* | sco3.2v5* | sco5v6*) + # Note: We CANNOT use -z defs as we might desire, because we do not + # link with -lc, and that would cause any symbols used from libc to + # always be unresolved, which means just about no library would + # ever link correctly. If we're not using GNU ld we use -z text + # though, which does catch some bad symbols but isn't as heavy-handed + # as -z defs. + no_undefined_flag='$wl-z,text' + allow_undefined_flag='$wl-z,nodefs' + archive_cmds_need_lc=no + hardcode_shlibpath_var=no + hardcode_libdir_flag_spec='$wl-R,$libdir' + hardcode_libdir_separator=':' + link_all_deplibs=yes + export_dynamic_flag_spec='$wl-Bexport' + runpath_var='LD_RUN_PATH' + + if test yes = "$GCC"; then + archive_cmds='$CC -shared $wl-h,$soname -o $lib $libobjs $deplibs $compiler_flags' + archive_expsym_cmds='$CC -shared $wl-Bexport:$export_symbols $wl-h,$soname -o $lib $libobjs $deplibs $compiler_flags' + else + archive_cmds='$CC -G $wl-h,$soname -o $lib $libobjs $deplibs $compiler_flags' + archive_expsym_cmds='$CC -G $wl-Bexport:$export_symbols $wl-h,$soname -o $lib $libobjs $deplibs $compiler_flags' + fi + ;; + + uts4*) + archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags' + hardcode_libdir_flag_spec='-L$libdir' + hardcode_shlibpath_var=no + ;; + + *) + ld_shlibs=no + ;; + esac + + if test sni = "$host_vendor"; then + case $host in + sysv4 | sysv4.2uw2* | sysv4.3* | sysv5*) + export_dynamic_flag_spec='$wl-Blargedynsym' + ;; + esac + fi + fi + +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ld_shlibs" >&5 +$as_echo "$ld_shlibs" >&6; } +test no = "$ld_shlibs" && can_build_shared=no + +with_gnu_ld=$with_gnu_ld + + + + + + + + + + + + + + + +# +# Do we need to explicitly link libc? +# +case "x$archive_cmds_need_lc" in +x|xyes) + # Assume -lc should be added + archive_cmds_need_lc=yes + + if test yes,yes = "$GCC,$enable_shared"; then + case $archive_cmds in + *'~'*) + # FIXME: we may have to deal with multi-command sequences. + ;; + '$CC '*) + # Test whether the compiler implicitly links with -lc since on some + # systems, -lgcc has to come before -lc. If gcc already passes -lc + # to ld, don't add -lc before -lgcc. + { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether -lc should be explicitly linked in" >&5 +$as_echo_n "checking whether -lc should be explicitly linked in... " >&6; } +if ${lt_cv_archive_cmds_need_lc+:} false; then : + $as_echo_n "(cached) " >&6 +else + $RM conftest* + echo "$lt_simple_compile_test_code" > conftest.$ac_ext + + if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5 + (eval $ac_compile) 2>&5 + ac_status=$? + $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 + test $ac_status = 0; } 2>conftest.err; then + soname=conftest + lib=conftest + libobjs=conftest.$ac_objext + deplibs= + wl=$lt_prog_compiler_wl + pic_flag=$lt_prog_compiler_pic + compiler_flags=-v + linker_flags=-v + verstring= + output_objdir=. + libname=conftest + lt_save_allow_undefined_flag=$allow_undefined_flag + allow_undefined_flag= + if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$archive_cmds 2\>\&1 \| $GREP \" -lc \" \>/dev/null 2\>\&1\""; } >&5 + (eval $archive_cmds 2\>\&1 \| $GREP \" -lc \" \>/dev/null 2\>\&1) 2>&5 + ac_status=$? + $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 + test $ac_status = 0; } + then + lt_cv_archive_cmds_need_lc=no + else + lt_cv_archive_cmds_need_lc=yes + fi + allow_undefined_flag=$lt_save_allow_undefined_flag + else + cat conftest.err 1>&5 + fi + $RM conftest* + +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_archive_cmds_need_lc" >&5 +$as_echo "$lt_cv_archive_cmds_need_lc" >&6; } + archive_cmds_need_lc=$lt_cv_archive_cmds_need_lc + ;; + esac + fi + ;; +esac + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + { $as_echo "$as_me:${as_lineno-$LINENO}: checking dynamic linker characteristics" >&5 +$as_echo_n "checking dynamic linker characteristics... " >&6; } + +if test yes = "$GCC"; then + case $host_os in + darwin*) lt_awk_arg='/^libraries:/,/LR/' ;; + *) lt_awk_arg='/^libraries:/' ;; + esac + case $host_os in + mingw* | cegcc*) lt_sed_strip_eq='s|=\([A-Za-z]:\)|\1|g' ;; + *) lt_sed_strip_eq='s|=/|/|g' ;; + esac + lt_search_path_spec=`$CC -print-search-dirs | awk $lt_awk_arg | $SED -e "s/^libraries://" -e $lt_sed_strip_eq` + case $lt_search_path_spec in + *\;*) + # if the path contains ";" then we assume it to be the separator + # otherwise default to the standard path separator (i.e. ":") - it is + # assumed that no part of a normal pathname contains ";" but that should + # okay in the real world where ";" in dirpaths is itself problematic. + lt_search_path_spec=`$ECHO "$lt_search_path_spec" | $SED 's/;/ /g'` + ;; + *) + lt_search_path_spec=`$ECHO "$lt_search_path_spec" | $SED "s/$PATH_SEPARATOR/ /g"` + ;; + esac + # Ok, now we have the path, separated by spaces, we can step through it + # and add multilib dir if necessary... + lt_tmp_lt_search_path_spec= + lt_multi_os_dir=/`$CC $CPPFLAGS $CFLAGS $LDFLAGS -print-multi-os-directory 2>/dev/null` + # ...but if some path component already ends with the multilib dir we assume + # that all is fine and trust -print-search-dirs as is (GCC 4.2? or newer). + case "$lt_multi_os_dir; $lt_search_path_spec " in + "/; "* | "/.; "* | "/./; "* | *"$lt_multi_os_dir "* | *"$lt_multi_os_dir/ "*) + lt_multi_os_dir= + ;; + esac + for lt_sys_path in $lt_search_path_spec; do + if test -d "$lt_sys_path$lt_multi_os_dir"; then + lt_tmp_lt_search_path_spec="$lt_tmp_lt_search_path_spec $lt_sys_path$lt_multi_os_dir" + elif test -n "$lt_multi_os_dir"; then + test -d "$lt_sys_path" && \ + lt_tmp_lt_search_path_spec="$lt_tmp_lt_search_path_spec $lt_sys_path" + fi + done + lt_search_path_spec=`$ECHO "$lt_tmp_lt_search_path_spec" | awk ' +BEGIN {RS = " "; FS = "/|\n";} { + lt_foo = ""; + lt_count = 0; + for (lt_i = NF; lt_i > 0; lt_i--) { + if ($lt_i != "" && $lt_i != ".") { + if ($lt_i == "..") { + lt_count++; + } else { + if (lt_count == 0) { + lt_foo = "/" $lt_i lt_foo; + } else { + lt_count--; + } + } + } + } + if (lt_foo != "") { lt_freq[lt_foo]++; } + if (lt_freq[lt_foo] == 1) { print lt_foo; } +}'` + # AWK program above erroneously prepends '/' to C:/dos/paths + # for these hosts. + case $host_os in + mingw* | cegcc*) lt_search_path_spec=`$ECHO "$lt_search_path_spec" |\ + $SED 's|/\([A-Za-z]:\)|\1|g'` ;; + esac + sys_lib_search_path_spec=`$ECHO "$lt_search_path_spec" | $lt_NL2SP` +else + sys_lib_search_path_spec="/lib /usr/lib /usr/local/lib" +fi +library_names_spec= +libname_spec='lib$name' +soname_spec= +shrext_cmds=.so +postinstall_cmds= +postuninstall_cmds= +finish_cmds= +finish_eval= +shlibpath_var= +shlibpath_overrides_runpath=unknown +version_type=none +dynamic_linker="$host_os ld.so" +sys_lib_dlsearch_path_spec="/lib /usr/lib" +need_lib_prefix=unknown +hardcode_into_libs=no + +# when you set need_version to no, make sure it does not cause -set_version +# flags to be left without arguments +need_version=unknown + + + +case $host_os in +aix3*) + version_type=linux # correct to gnu/linux during the next big refactor + library_names_spec='$libname$release$shared_ext$versuffix $libname.a' + shlibpath_var=LIBPATH + + # AIX 3 has no versioning support, so we append a major version to the name. + soname_spec='$libname$release$shared_ext$major' + ;; + +aix[4-9]*) + version_type=linux # correct to gnu/linux during the next big refactor + need_lib_prefix=no + need_version=no + hardcode_into_libs=yes + if test ia64 = "$host_cpu"; then + # AIX 5 supports IA64 + library_names_spec='$libname$release$shared_ext$major $libname$release$shared_ext$versuffix $libname$shared_ext' + shlibpath_var=LD_LIBRARY_PATH + else + # With GCC up to 2.95.x, collect2 would create an import file + # for dependence libraries. The import file would start with + # the line '#! .'. This would cause the generated library to + # depend on '.', always an invalid library. This was fixed in + # development snapshots of GCC prior to 3.0. + case $host_os in + aix4 | aix4.[01] | aix4.[01].*) + if { echo '#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 97)' + echo ' yes ' + echo '#endif'; } | $CC -E - | $GREP yes > /dev/null; then + : + else + can_build_shared=no + fi + ;; + esac + # Using Import Files as archive members, it is possible to support + # filename-based versioning of shared library archives on AIX. While + # this would work for both with and without runtime linking, it will + # prevent static linking of such archives. So we do filename-based + # shared library versioning with .so extension only, which is used + # when both runtime linking and shared linking is enabled. + # Unfortunately, runtime linking may impact performance, so we do + # not want this to be the default eventually. Also, we use the + # versioned .so libs for executables only if there is the -brtl + # linker flag in LDFLAGS as well, or --with-aix-soname=svr4 only. + # To allow for filename-based versioning support, we need to create + # libNAME.so.V as an archive file, containing: + # *) an Import File, referring to the versioned filename of the + # archive as well as the shared archive member, telling the + # bitwidth (32 or 64) of that shared object, and providing the + # list of exported symbols of that shared object, eventually + # decorated with the 'weak' keyword + # *) the shared object with the F_LOADONLY flag set, to really avoid + # it being seen by the linker. + # At run time we better use the real file rather than another symlink, + # but for link time we create the symlink libNAME.so -> libNAME.so.V + + case $with_aix_soname,$aix_use_runtimelinking in + # AIX (on Power*) has no versioning support, so currently we cannot hardcode correct + # soname into executable. Probably we can add versioning support to + # collect2, so additional links can be useful in future. + aix,yes) # traditional libtool + dynamic_linker='AIX unversionable lib.so' + # If using run time linking (on AIX 4.2 or later) use lib.so + # instead of lib.a to let people know that these are not + # typical AIX shared libraries. + library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext' + ;; + aix,no) # traditional AIX only + dynamic_linker='AIX lib.a(lib.so.V)' + # We preserve .a as extension for shared libraries through AIX4.2 + # and later when we are not doing run time linking. + library_names_spec='$libname$release.a $libname.a' + soname_spec='$libname$release$shared_ext$major' + ;; + svr4,*) # full svr4 only + dynamic_linker="AIX lib.so.V($shared_archive_member_spec.o)" + library_names_spec='$libname$release$shared_ext$major $libname$shared_ext' + # We do not specify a path in Import Files, so LIBPATH fires. + shlibpath_overrides_runpath=yes + ;; + *,yes) # both, prefer svr4 + dynamic_linker="AIX lib.so.V($shared_archive_member_spec.o), lib.a(lib.so.V)" + library_names_spec='$libname$release$shared_ext$major $libname$shared_ext' + # unpreferred sharedlib libNAME.a needs extra handling + postinstall_cmds='test -n "$linkname" || linkname="$realname"~func_stripname "" ".so" "$linkname"~$install_shared_prog "$dir/$func_stripname_result.$libext" "$destdir/$func_stripname_result.$libext"~test -z "$tstripme" || test -z "$striplib" || $striplib "$destdir/$func_stripname_result.$libext"' + postuninstall_cmds='for n in $library_names $old_library; do :; done~func_stripname "" ".so" "$n"~test "$func_stripname_result" = "$n" || func_append rmfiles " $odir/$func_stripname_result.$libext"' + # We do not specify a path in Import Files, so LIBPATH fires. + shlibpath_overrides_runpath=yes + ;; + *,no) # both, prefer aix + dynamic_linker="AIX lib.a(lib.so.V), lib.so.V($shared_archive_member_spec.o)" + library_names_spec='$libname$release.a $libname.a' + soname_spec='$libname$release$shared_ext$major' + # unpreferred sharedlib libNAME.so.V and symlink libNAME.so need extra handling + postinstall_cmds='test -z "$dlname" || $install_shared_prog $dir/$dlname $destdir/$dlname~test -z "$tstripme" || test -z "$striplib" || $striplib $destdir/$dlname~test -n "$linkname" || linkname=$realname~func_stripname "" ".a" "$linkname"~(cd "$destdir" && $LN_S -f $dlname $func_stripname_result.so)' + postuninstall_cmds='test -z "$dlname" || func_append rmfiles " $odir/$dlname"~for n in $old_library $library_names; do :; done~func_stripname "" ".a" "$n"~func_append rmfiles " $odir/$func_stripname_result.so"' + ;; + esac + shlibpath_var=LIBPATH + fi + ;; + +amigaos*) + case $host_cpu in + powerpc) + # Since July 2007 AmigaOS4 officially supports .so libraries. + # When compiling the executable, add -use-dynld -Lsobjs: to the compileline. + library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext' + ;; + m68k) + library_names_spec='$libname.ixlibrary $libname.a' + # Create ${libname}_ixlibrary.a entries in /sys/libs. + finish_eval='for lib in `ls $libdir/*.ixlibrary 2>/dev/null`; do libname=`func_echo_all "$lib" | $SED '\''s%^.*/\([^/]*\)\.ixlibrary$%\1%'\''`; $RM /sys/libs/${libname}_ixlibrary.a; $show "cd /sys/libs && $LN_S $lib ${libname}_ixlibrary.a"; cd /sys/libs && $LN_S $lib ${libname}_ixlibrary.a || exit 1; done' + ;; + esac + ;; + +beos*) + library_names_spec='$libname$shared_ext' + dynamic_linker="$host_os ld.so" + shlibpath_var=LIBRARY_PATH + ;; + +bsdi[45]*) + version_type=linux # correct to gnu/linux during the next big refactor + need_version=no + library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext' + soname_spec='$libname$release$shared_ext$major' + finish_cmds='PATH="\$PATH:/sbin" ldconfig $libdir' + shlibpath_var=LD_LIBRARY_PATH + sys_lib_search_path_spec="/shlib /usr/lib /usr/X11/lib /usr/contrib/lib /lib /usr/local/lib" + sys_lib_dlsearch_path_spec="/shlib /usr/lib /usr/local/lib" + # the default ld.so.conf also contains /usr/contrib/lib and + # /usr/X11R6/lib (/usr/X11 is a link to /usr/X11R6), but let us allow + # libtool to hard-code these into programs + ;; + +cygwin* | mingw* | pw32* | cegcc*) + version_type=windows + shrext_cmds=.dll + need_version=no + need_lib_prefix=no + + case $GCC,$cc_basename in + yes,*) + # gcc + library_names_spec='$libname.dll.a' + # DLL is installed to $(libdir)/../bin by postinstall_cmds + postinstall_cmds='base_file=`basename \$file`~ + dlpath=`$SHELL 2>&1 -c '\''. $dir/'\''\$base_file'\''i; echo \$dlname'\''`~ + dldir=$destdir/`dirname \$dlpath`~ + test -d \$dldir || mkdir -p \$dldir~ + $install_prog $dir/$dlname \$dldir/$dlname~ + chmod a+x \$dldir/$dlname~ + if test -n '\''$stripme'\'' && test -n '\''$striplib'\''; then + eval '\''$striplib \$dldir/$dlname'\'' || exit \$?; + fi' + postuninstall_cmds='dldll=`$SHELL 2>&1 -c '\''. $file; echo \$dlname'\''`~ + dlpath=$dir/\$dldll~ + $RM \$dlpath' + shlibpath_overrides_runpath=yes + + case $host_os in + cygwin*) + # Cygwin DLLs use 'cyg' prefix rather than 'lib' + soname_spec='`echo $libname | sed -e 's/^lib/cyg/'``echo $release | $SED -e 's/[.]/-/g'`$versuffix$shared_ext' + + sys_lib_search_path_spec="$sys_lib_search_path_spec /usr/lib/w32api" + ;; + mingw* | cegcc*) + # MinGW DLLs use traditional 'lib' prefix + soname_spec='$libname`echo $release | $SED -e 's/[.]/-/g'`$versuffix$shared_ext' + ;; + pw32*) + # pw32 DLLs use 'pw' prefix rather than 'lib' + library_names_spec='`echo $libname | sed -e 's/^lib/pw/'``echo $release | $SED -e 's/[.]/-/g'`$versuffix$shared_ext' + ;; + esac + dynamic_linker='Win32 ld.exe' + ;; + + *,cl*) + # Native MSVC + libname_spec='$name' + soname_spec='$libname`echo $release | $SED -e 's/[.]/-/g'`$versuffix$shared_ext' + library_names_spec='$libname.dll.lib' + + case $build_os in + mingw*) + sys_lib_search_path_spec= + lt_save_ifs=$IFS + IFS=';' + for lt_path in $LIB + do + IFS=$lt_save_ifs + # Let DOS variable expansion print the short 8.3 style file name. + lt_path=`cd "$lt_path" 2>/dev/null && cmd //C "for %i in (".") do @echo %~si"` + sys_lib_search_path_spec="$sys_lib_search_path_spec $lt_path" + done + IFS=$lt_save_ifs + # Convert to MSYS style. + sys_lib_search_path_spec=`$ECHO "$sys_lib_search_path_spec" | sed -e 's|\\\\|/|g' -e 's| \\([a-zA-Z]\\):| /\\1|g' -e 's|^ ||'` + ;; + cygwin*) + # Convert to unix form, then to dos form, then back to unix form + # but this time dos style (no spaces!) so that the unix form looks + # like /cygdrive/c/PROGRA~1:/cygdr... + sys_lib_search_path_spec=`cygpath --path --unix "$LIB"` + sys_lib_search_path_spec=`cygpath --path --dos "$sys_lib_search_path_spec" 2>/dev/null` + sys_lib_search_path_spec=`cygpath --path --unix "$sys_lib_search_path_spec" | $SED -e "s/$PATH_SEPARATOR/ /g"` + ;; + *) + sys_lib_search_path_spec=$LIB + if $ECHO "$sys_lib_search_path_spec" | $GREP ';[c-zC-Z]:/' >/dev/null; then + # It is most probably a Windows format PATH. + sys_lib_search_path_spec=`$ECHO "$sys_lib_search_path_spec" | $SED -e 's/;/ /g'` + else + sys_lib_search_path_spec=`$ECHO "$sys_lib_search_path_spec" | $SED -e "s/$PATH_SEPARATOR/ /g"` + fi + # FIXME: find the short name or the path components, as spaces are + # common. (e.g. "Program Files" -> "PROGRA~1") + ;; + esac + + # DLL is installed to $(libdir)/../bin by postinstall_cmds + postinstall_cmds='base_file=`basename \$file`~ + dlpath=`$SHELL 2>&1 -c '\''. $dir/'\''\$base_file'\''i; echo \$dlname'\''`~ + dldir=$destdir/`dirname \$dlpath`~ + test -d \$dldir || mkdir -p \$dldir~ + $install_prog $dir/$dlname \$dldir/$dlname' + postuninstall_cmds='dldll=`$SHELL 2>&1 -c '\''. $file; echo \$dlname'\''`~ + dlpath=$dir/\$dldll~ + $RM \$dlpath' + shlibpath_overrides_runpath=yes + dynamic_linker='Win32 link.exe' + ;; + + *) + # Assume MSVC wrapper + library_names_spec='$libname`echo $release | $SED -e 's/[.]/-/g'`$versuffix$shared_ext $libname.lib' + dynamic_linker='Win32 ld.exe' + ;; + esac + # FIXME: first we should search . and the directory the executable is in + shlibpath_var=PATH + ;; + +darwin* | rhapsody*) + dynamic_linker="$host_os dyld" + version_type=darwin + need_lib_prefix=no + need_version=no + library_names_spec='$libname$release$major$shared_ext $libname$shared_ext' + soname_spec='$libname$release$major$shared_ext' + shlibpath_overrides_runpath=yes + shlibpath_var=DYLD_LIBRARY_PATH + shrext_cmds='`test .$module = .yes && echo .so || echo .dylib`' + + sys_lib_search_path_spec="$sys_lib_search_path_spec /usr/local/lib" + sys_lib_dlsearch_path_spec='/usr/local/lib /lib /usr/lib' + ;; + +dgux*) + version_type=linux # correct to gnu/linux during the next big refactor + need_lib_prefix=no + need_version=no + library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext' + soname_spec='$libname$release$shared_ext$major' + shlibpath_var=LD_LIBRARY_PATH + ;; + +freebsd* | dragonfly*) + # DragonFly does not have aout. When/if they implement a new + # versioning mechanism, adjust this. + if test -x /usr/bin/objformat; then + objformat=`/usr/bin/objformat` + else + case $host_os in + freebsd[23].*) objformat=aout ;; + *) objformat=elf ;; + esac + fi + version_type=freebsd-$objformat + case $version_type in + freebsd-elf*) + library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext' + soname_spec='$libname$release$shared_ext$major' + need_version=no + need_lib_prefix=no + ;; + freebsd-*) + library_names_spec='$libname$release$shared_ext$versuffix $libname$shared_ext$versuffix' + need_version=yes + ;; + esac + shlibpath_var=LD_LIBRARY_PATH + case $host_os in + freebsd2.*) + shlibpath_overrides_runpath=yes + ;; + freebsd3.[01]* | freebsdelf3.[01]*) + shlibpath_overrides_runpath=yes + hardcode_into_libs=yes + ;; + freebsd3.[2-9]* | freebsdelf3.[2-9]* | \ + freebsd4.[0-5] | freebsdelf4.[0-5] | freebsd4.1.1 | freebsdelf4.1.1) + shlibpath_overrides_runpath=no + hardcode_into_libs=yes + ;; + *) # from 4.6 on, and DragonFly + shlibpath_overrides_runpath=yes + hardcode_into_libs=yes + ;; + esac + ;; + +haiku*) + version_type=linux # correct to gnu/linux during the next big refactor + need_lib_prefix=no + need_version=no + dynamic_linker="$host_os runtime_loader" + library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext' + soname_spec='$libname$release$shared_ext$major' + shlibpath_var=LIBRARY_PATH + shlibpath_overrides_runpath=no + sys_lib_dlsearch_path_spec='/boot/home/config/lib /boot/common/lib /boot/system/lib' + hardcode_into_libs=yes + ;; + +hpux9* | hpux10* | hpux11*) + # Give a soname corresponding to the major version so that dld.sl refuses to + # link against other versions. + version_type=sunos + need_lib_prefix=no + need_version=no + case $host_cpu in + ia64*) + shrext_cmds='.so' + hardcode_into_libs=yes + dynamic_linker="$host_os dld.so" + shlibpath_var=LD_LIBRARY_PATH + shlibpath_overrides_runpath=yes # Unless +noenvvar is specified. + library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext' + soname_spec='$libname$release$shared_ext$major' + if test 32 = "$HPUX_IA64_MODE"; then + sys_lib_search_path_spec="/usr/lib/hpux32 /usr/local/lib/hpux32 /usr/local/lib" + sys_lib_dlsearch_path_spec=/usr/lib/hpux32 + else + sys_lib_search_path_spec="/usr/lib/hpux64 /usr/local/lib/hpux64" + sys_lib_dlsearch_path_spec=/usr/lib/hpux64 + fi + ;; + hppa*64*) + shrext_cmds='.sl' + hardcode_into_libs=yes + dynamic_linker="$host_os dld.sl" + shlibpath_var=LD_LIBRARY_PATH # How should we handle SHLIB_PATH + shlibpath_overrides_runpath=yes # Unless +noenvvar is specified. + library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext' + soname_spec='$libname$release$shared_ext$major' + sys_lib_search_path_spec="/usr/lib/pa20_64 /usr/ccs/lib/pa20_64" + sys_lib_dlsearch_path_spec=$sys_lib_search_path_spec + ;; + *) + shrext_cmds='.sl' + dynamic_linker="$host_os dld.sl" + shlibpath_var=SHLIB_PATH + shlibpath_overrides_runpath=no # +s is required to enable SHLIB_PATH + library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext' + soname_spec='$libname$release$shared_ext$major' + ;; + esac + # HP-UX runs *really* slowly unless shared libraries are mode 555, ... + postinstall_cmds='chmod 555 $lib' + # or fails outright, so override atomically: + install_override_mode=555 + ;; + +interix[3-9]*) + version_type=linux # correct to gnu/linux during the next big refactor + need_lib_prefix=no + need_version=no + library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext' + soname_spec='$libname$release$shared_ext$major' + dynamic_linker='Interix 3.x ld.so.1 (PE, like ELF)' + shlibpath_var=LD_LIBRARY_PATH + shlibpath_overrides_runpath=no + hardcode_into_libs=yes + ;; + +irix5* | irix6* | nonstopux*) + case $host_os in + nonstopux*) version_type=nonstopux ;; + *) + if test yes = "$lt_cv_prog_gnu_ld"; then + version_type=linux # correct to gnu/linux during the next big refactor + else + version_type=irix + fi ;; + esac + need_lib_prefix=no + need_version=no + soname_spec='$libname$release$shared_ext$major' + library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$release$shared_ext $libname$shared_ext' + case $host_os in + irix5* | nonstopux*) + libsuff= shlibsuff= + ;; + *) + case $LD in # libtool.m4 will add one of these switches to LD + *-32|*"-32 "|*-melf32bsmip|*"-melf32bsmip ") + libsuff= shlibsuff= libmagic=32-bit;; + *-n32|*"-n32 "|*-melf32bmipn32|*"-melf32bmipn32 ") + libsuff=32 shlibsuff=N32 libmagic=N32;; + *-64|*"-64 "|*-melf64bmip|*"-melf64bmip ") + libsuff=64 shlibsuff=64 libmagic=64-bit;; + *) libsuff= shlibsuff= libmagic=never-match;; + esac + ;; + esac + shlibpath_var=LD_LIBRARY${shlibsuff}_PATH + shlibpath_overrides_runpath=no + sys_lib_search_path_spec="/usr/lib$libsuff /lib$libsuff /usr/local/lib$libsuff" + sys_lib_dlsearch_path_spec="/usr/lib$libsuff /lib$libsuff" + hardcode_into_libs=yes + ;; + +# No shared lib support for Linux oldld, aout, or coff. +linux*oldld* | linux*aout* | linux*coff*) + dynamic_linker=no + ;; + +linux*android*) + version_type=none # Android doesn't support versioned libraries. + need_lib_prefix=no + need_version=no + library_names_spec='$libname$release$shared_ext' + soname_spec='$libname$release$shared_ext' + finish_cmds= + shlibpath_var=LD_LIBRARY_PATH + shlibpath_overrides_runpath=yes + + # This implies no fast_install, which is unacceptable. + # Some rework will be needed to allow for fast_install + # before this can be enabled. + hardcode_into_libs=yes + + dynamic_linker='Android linker' + # Don't embed -rpath directories since the linker doesn't support them. + hardcode_libdir_flag_spec='-L$libdir' + ;; + +# This must be glibc/ELF. +linux* | k*bsd*-gnu | kopensolaris*-gnu | gnu*) + version_type=linux # correct to gnu/linux during the next big refactor + need_lib_prefix=no + need_version=no + library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext' + soname_spec='$libname$release$shared_ext$major' + finish_cmds='PATH="\$PATH:/sbin" ldconfig -n $libdir' + shlibpath_var=LD_LIBRARY_PATH + shlibpath_overrides_runpath=no + + # Some binutils ld are patched to set DT_RUNPATH + if ${lt_cv_shlibpath_overrides_runpath+:} false; then : + $as_echo_n "(cached) " >&6 +else + lt_cv_shlibpath_overrides_runpath=no + save_LDFLAGS=$LDFLAGS + save_libdir=$libdir + eval "libdir=/foo; wl=\"$lt_prog_compiler_wl\"; \ + LDFLAGS=\"\$LDFLAGS $hardcode_libdir_flag_spec\"" + cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ + +int +main () +{ + + ; + return 0; +} +_ACEOF +if ac_fn_c_try_link "$LINENO"; then : + if ($OBJDUMP -p conftest$ac_exeext) 2>/dev/null | grep "RUNPATH.*$libdir" >/dev/null; then : + lt_cv_shlibpath_overrides_runpath=yes +fi +fi +rm -f core conftest.err conftest.$ac_objext \ + conftest$ac_exeext conftest.$ac_ext + LDFLAGS=$save_LDFLAGS + libdir=$save_libdir + +fi + + shlibpath_overrides_runpath=$lt_cv_shlibpath_overrides_runpath + + # This implies no fast_install, which is unacceptable. + # Some rework will be needed to allow for fast_install + # before this can be enabled. + hardcode_into_libs=yes + + # Ideally, we could use ldconfig to report *all* directores which are + # searched for libraries, however this is still not possible. Aside from not + # being certain /sbin/ldconfig is available, command + # 'ldconfig -N -X -v | grep ^/' on 64bit Fedora does not report /usr/lib64, + # even though it is searched at run-time. Try to do the best guess by + # appending ld.so.conf contents (and includes) to the search path. + if test -f /etc/ld.so.conf; then + lt_ld_extra=`awk '/^include / { system(sprintf("cd /etc; cat %s 2>/dev/null", \$2)); skip = 1; } { if (!skip) print \$0; skip = 0; }' < /etc/ld.so.conf | $SED -e 's/#.*//;/^[ ]*hwcap[ ]/d;s/[:, ]/ /g;s/=[^=]*$//;s/=[^= ]* / /g;s/"//g;/^$/d' | tr '\n' ' '` + sys_lib_dlsearch_path_spec="/lib /usr/lib $lt_ld_extra" + fi + + # We used to test for /lib/ld.so.1 and disable shared libraries on + # powerpc, because MkLinux only supported shared libraries with the + # GNU dynamic linker. Since this was broken with cross compilers, + # most powerpc-linux boxes support dynamic linking these days and + # people can always --disable-shared, the test was removed, and we + # assume the GNU/Linux dynamic linker is in use. + dynamic_linker='GNU/Linux ld.so' + ;; + +netbsd*) + version_type=sunos + need_lib_prefix=no + need_version=no + if echo __ELF__ | $CC -E - | $GREP __ELF__ >/dev/null; then + library_names_spec='$libname$release$shared_ext$versuffix $libname$shared_ext$versuffix' + finish_cmds='PATH="\$PATH:/sbin" ldconfig -m $libdir' + dynamic_linker='NetBSD (a.out) ld.so' + else + library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext' + soname_spec='$libname$release$shared_ext$major' + dynamic_linker='NetBSD ld.elf_so' + fi + shlibpath_var=LD_LIBRARY_PATH + shlibpath_overrides_runpath=yes + hardcode_into_libs=yes + ;; + +newsos6) + version_type=linux # correct to gnu/linux during the next big refactor + library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext' + shlibpath_var=LD_LIBRARY_PATH + shlibpath_overrides_runpath=yes + ;; + +*nto* | *qnx*) + version_type=qnx + need_lib_prefix=no + need_version=no + library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext' + soname_spec='$libname$release$shared_ext$major' + shlibpath_var=LD_LIBRARY_PATH + shlibpath_overrides_runpath=no + hardcode_into_libs=yes + dynamic_linker='ldqnx.so' + ;; + +openbsd* | bitrig*) + version_type=sunos + sys_lib_dlsearch_path_spec=/usr/lib + need_lib_prefix=no + if test -z "`echo __ELF__ | $CC -E - | $GREP __ELF__`"; then + need_version=no + else + need_version=yes + fi + library_names_spec='$libname$release$shared_ext$versuffix $libname$shared_ext$versuffix' + finish_cmds='PATH="\$PATH:/sbin" ldconfig -m $libdir' + shlibpath_var=LD_LIBRARY_PATH + shlibpath_overrides_runpath=yes + ;; + +os2*) + libname_spec='$name' + version_type=windows + shrext_cmds=.dll + need_version=no + need_lib_prefix=no + # OS/2 can only load a DLL with a base name of 8 characters or less. + soname_spec='`test -n "$os2dllname" && libname="$os2dllname"; + v=$($ECHO $release$versuffix | tr -d .-); + n=$($ECHO $libname | cut -b -$((8 - ${#v})) | tr . _); + $ECHO $n$v`$shared_ext' + library_names_spec='${libname}_dll.$libext' + dynamic_linker='OS/2 ld.exe' + shlibpath_var=BEGINLIBPATH + sys_lib_search_path_spec="/lib /usr/lib /usr/local/lib" + sys_lib_dlsearch_path_spec=$sys_lib_search_path_spec + postinstall_cmds='base_file=`basename \$file`~ + dlpath=`$SHELL 2>&1 -c '\''. $dir/'\''\$base_file'\''i; $ECHO \$dlname'\''`~ + dldir=$destdir/`dirname \$dlpath`~ + test -d \$dldir || mkdir -p \$dldir~ + $install_prog $dir/$dlname \$dldir/$dlname~ + chmod a+x \$dldir/$dlname~ + if test -n '\''$stripme'\'' && test -n '\''$striplib'\''; then + eval '\''$striplib \$dldir/$dlname'\'' || exit \$?; + fi' + postuninstall_cmds='dldll=`$SHELL 2>&1 -c '\''. $file; $ECHO \$dlname'\''`~ + dlpath=$dir/\$dldll~ + $RM \$dlpath' + ;; + +osf3* | osf4* | osf5*) + version_type=osf + need_lib_prefix=no + need_version=no + soname_spec='$libname$release$shared_ext$major' + library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext' + shlibpath_var=LD_LIBRARY_PATH + sys_lib_search_path_spec="/usr/shlib /usr/ccs/lib /usr/lib/cmplrs/cc /usr/lib /usr/local/lib /var/shlib" + sys_lib_dlsearch_path_spec=$sys_lib_search_path_spec + ;; + +rdos*) + dynamic_linker=no + ;; + +solaris*) + version_type=linux # correct to gnu/linux during the next big refactor + need_lib_prefix=no + need_version=no + library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext' + soname_spec='$libname$release$shared_ext$major' + shlibpath_var=LD_LIBRARY_PATH + shlibpath_overrides_runpath=yes + hardcode_into_libs=yes + # ldd complains unless libraries are executable + postinstall_cmds='chmod +x $lib' + ;; + +sunos4*) + version_type=sunos + library_names_spec='$libname$release$shared_ext$versuffix $libname$shared_ext$versuffix' + finish_cmds='PATH="\$PATH:/usr/etc" ldconfig $libdir' + shlibpath_var=LD_LIBRARY_PATH + shlibpath_overrides_runpath=yes + if test yes = "$with_gnu_ld"; then + need_lib_prefix=no + fi + need_version=yes + ;; + +sysv4 | sysv4.3*) + version_type=linux # correct to gnu/linux during the next big refactor + library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext' + soname_spec='$libname$release$shared_ext$major' + shlibpath_var=LD_LIBRARY_PATH + case $host_vendor in + sni) + shlibpath_overrides_runpath=no + need_lib_prefix=no + runpath_var=LD_RUN_PATH + ;; + siemens) + need_lib_prefix=no + ;; + motorola) + need_lib_prefix=no + need_version=no + shlibpath_overrides_runpath=no + sys_lib_search_path_spec='/lib /usr/lib /usr/ccs/lib' + ;; + esac + ;; + +sysv4*MP*) + if test -d /usr/nec; then + version_type=linux # correct to gnu/linux during the next big refactor + library_names_spec='$libname$shared_ext.$versuffix $libname$shared_ext.$major $libname$shared_ext' + soname_spec='$libname$shared_ext.$major' + shlibpath_var=LD_LIBRARY_PATH + fi + ;; + +sysv5* | sco3.2v5* | sco5v6* | unixware* | OpenUNIX* | sysv4*uw2*) + version_type=sco + need_lib_prefix=no + need_version=no + library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext $libname$shared_ext' + soname_spec='$libname$release$shared_ext$major' + shlibpath_var=LD_LIBRARY_PATH + shlibpath_overrides_runpath=yes + hardcode_into_libs=yes + if test yes = "$with_gnu_ld"; then + sys_lib_search_path_spec='/usr/local/lib /usr/gnu/lib /usr/ccs/lib /usr/lib /lib' + else + sys_lib_search_path_spec='/usr/ccs/lib /usr/lib' + case $host_os in + sco3.2v5*) + sys_lib_search_path_spec="$sys_lib_search_path_spec /lib" + ;; + esac + fi + sys_lib_dlsearch_path_spec='/usr/lib' + ;; + +tpf*) + # TPF is a cross-target only. Preferred cross-host = GNU/Linux. + version_type=linux # correct to gnu/linux during the next big refactor + need_lib_prefix=no + need_version=no + library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext' + shlibpath_var=LD_LIBRARY_PATH + shlibpath_overrides_runpath=no + hardcode_into_libs=yes + ;; + +uts4*) + version_type=linux # correct to gnu/linux during the next big refactor + library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext' + soname_spec='$libname$release$shared_ext$major' + shlibpath_var=LD_LIBRARY_PATH + ;; + +*) + dynamic_linker=no + ;; +esac +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $dynamic_linker" >&5 +$as_echo "$dynamic_linker" >&6; } +test no = "$dynamic_linker" && can_build_shared=no + +variables_saved_for_relink="PATH $shlibpath_var $runpath_var" +if test yes = "$GCC"; then + variables_saved_for_relink="$variables_saved_for_relink GCC_EXEC_PREFIX COMPILER_PATH LIBRARY_PATH" +fi + +if test set = "${lt_cv_sys_lib_search_path_spec+set}"; then + sys_lib_search_path_spec=$lt_cv_sys_lib_search_path_spec +fi + +if test set = "${lt_cv_sys_lib_dlsearch_path_spec+set}"; then + sys_lib_dlsearch_path_spec=$lt_cv_sys_lib_dlsearch_path_spec +fi + +# remember unaugmented sys_lib_dlsearch_path content for libtool script decls... +configure_time_dlsearch_path=$sys_lib_dlsearch_path_spec + +# ... but it needs LT_SYS_LIBRARY_PATH munging for other configure-time code +func_munge_path_list sys_lib_dlsearch_path_spec "$LT_SYS_LIBRARY_PATH" + +# to be used as default LT_SYS_LIBRARY_PATH value in generated libtool +configure_time_lt_sys_library_path=$LT_SYS_LIBRARY_PATH + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + { $as_echo "$as_me:${as_lineno-$LINENO}: checking how to hardcode library paths into programs" >&5 +$as_echo_n "checking how to hardcode library paths into programs... " >&6; } +hardcode_action= +if test -n "$hardcode_libdir_flag_spec" || + test -n "$runpath_var" || + test yes = "$hardcode_automatic"; then + + # We can hardcode non-existent directories. + if test no != "$hardcode_direct" && + # If the only mechanism to avoid hardcoding is shlibpath_var, we + # have to relink, otherwise we might link with an installed library + # when we should be linking with a yet-to-be-installed one + ## test no != "$_LT_TAGVAR(hardcode_shlibpath_var, )" && + test no != "$hardcode_minus_L"; then + # Linking always hardcodes the temporary library directory. + hardcode_action=relink + else + # We can link without hardcoding, and we can hardcode nonexisting dirs. + hardcode_action=immediate + fi +else + # We cannot hardcode anything, or else we can only hardcode existing + # directories. + hardcode_action=unsupported +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $hardcode_action" >&5 +$as_echo "$hardcode_action" >&6; } + +if test relink = "$hardcode_action" || + test yes = "$inherit_rpath"; then + # Fast installation is not supported + enable_fast_install=no +elif test yes = "$shlibpath_overrides_runpath" || + test no = "$enable_shared"; then + # Fast installation is not necessary + enable_fast_install=needless +fi + + + + + + + if test yes != "$enable_dlopen"; then + enable_dlopen=unknown + enable_dlopen_self=unknown + enable_dlopen_self_static=unknown +else + lt_cv_dlopen=no + lt_cv_dlopen_libs= + + case $host_os in + beos*) + lt_cv_dlopen=load_add_on + lt_cv_dlopen_libs= + lt_cv_dlopen_self=yes + ;; + + mingw* | pw32* | cegcc*) + lt_cv_dlopen=LoadLibrary + lt_cv_dlopen_libs= + ;; + + cygwin*) + lt_cv_dlopen=dlopen + lt_cv_dlopen_libs= + ;; + + darwin*) + # if libdl is installed we need to link against it + { $as_echo "$as_me:${as_lineno-$LINENO}: checking for dlopen in -ldl" >&5 +$as_echo_n "checking for dlopen in -ldl... " >&6; } +if ${ac_cv_lib_dl_dlopen+:} false; then : + $as_echo_n "(cached) " >&6 +else + ac_check_lib_save_LIBS=$LIBS +LIBS="-ldl $LIBS" +cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ + +/* Override any GCC internal prototype to avoid an error. + Use char because int might match the return type of a GCC + builtin and then its argument prototype would still apply. */ +#ifdef __cplusplus +extern "C" +#endif +char dlopen (); +int +main () +{ +return dlopen (); + ; + return 0; +} +_ACEOF +if ac_fn_c_try_link "$LINENO"; then : + ac_cv_lib_dl_dlopen=yes +else + ac_cv_lib_dl_dlopen=no +fi +rm -f core conftest.err conftest.$ac_objext \ + conftest$ac_exeext conftest.$ac_ext +LIBS=$ac_check_lib_save_LIBS +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_dl_dlopen" >&5 +$as_echo "$ac_cv_lib_dl_dlopen" >&6; } +if test "x$ac_cv_lib_dl_dlopen" = xyes; then : + lt_cv_dlopen=dlopen lt_cv_dlopen_libs=-ldl +else + + lt_cv_dlopen=dyld + lt_cv_dlopen_libs= + lt_cv_dlopen_self=yes + +fi + + ;; + + tpf*) + # Don't try to run any link tests for TPF. We know it's impossible + # because TPF is a cross-compiler, and we know how we open DSOs. + lt_cv_dlopen=dlopen + lt_cv_dlopen_libs= + lt_cv_dlopen_self=no + ;; + + *) + ac_fn_c_check_func "$LINENO" "shl_load" "ac_cv_func_shl_load" +if test "x$ac_cv_func_shl_load" = xyes; then : + lt_cv_dlopen=shl_load +else + { $as_echo "$as_me:${as_lineno-$LINENO}: checking for shl_load in -ldld" >&5 +$as_echo_n "checking for shl_load in -ldld... " >&6; } +if ${ac_cv_lib_dld_shl_load+:} false; then : + $as_echo_n "(cached) " >&6 +else + ac_check_lib_save_LIBS=$LIBS +LIBS="-ldld $LIBS" +cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ + +/* Override any GCC internal prototype to avoid an error. + Use char because int might match the return type of a GCC + builtin and then its argument prototype would still apply. */ +#ifdef __cplusplus +extern "C" +#endif +char shl_load (); +int +main () +{ +return shl_load (); + ; + return 0; +} +_ACEOF +if ac_fn_c_try_link "$LINENO"; then : + ac_cv_lib_dld_shl_load=yes +else + ac_cv_lib_dld_shl_load=no +fi +rm -f core conftest.err conftest.$ac_objext \ + conftest$ac_exeext conftest.$ac_ext +LIBS=$ac_check_lib_save_LIBS +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_dld_shl_load" >&5 +$as_echo "$ac_cv_lib_dld_shl_load" >&6; } +if test "x$ac_cv_lib_dld_shl_load" = xyes; then : + lt_cv_dlopen=shl_load lt_cv_dlopen_libs=-ldld +else + ac_fn_c_check_func "$LINENO" "dlopen" "ac_cv_func_dlopen" +if test "x$ac_cv_func_dlopen" = xyes; then : + lt_cv_dlopen=dlopen +else + { $as_echo "$as_me:${as_lineno-$LINENO}: checking for dlopen in -ldl" >&5 +$as_echo_n "checking for dlopen in -ldl... " >&6; } +if ${ac_cv_lib_dl_dlopen+:} false; then : + $as_echo_n "(cached) " >&6 +else + ac_check_lib_save_LIBS=$LIBS +LIBS="-ldl $LIBS" +cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ + +/* Override any GCC internal prototype to avoid an error. + Use char because int might match the return type of a GCC + builtin and then its argument prototype would still apply. */ +#ifdef __cplusplus +extern "C" +#endif +char dlopen (); +int +main () +{ +return dlopen (); + ; + return 0; +} +_ACEOF +if ac_fn_c_try_link "$LINENO"; then : + ac_cv_lib_dl_dlopen=yes +else + ac_cv_lib_dl_dlopen=no +fi +rm -f core conftest.err conftest.$ac_objext \ + conftest$ac_exeext conftest.$ac_ext +LIBS=$ac_check_lib_save_LIBS +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_dl_dlopen" >&5 +$as_echo "$ac_cv_lib_dl_dlopen" >&6; } +if test "x$ac_cv_lib_dl_dlopen" = xyes; then : + lt_cv_dlopen=dlopen lt_cv_dlopen_libs=-ldl +else + { $as_echo "$as_me:${as_lineno-$LINENO}: checking for dlopen in -lsvld" >&5 +$as_echo_n "checking for dlopen in -lsvld... " >&6; } +if ${ac_cv_lib_svld_dlopen+:} false; then : + $as_echo_n "(cached) " >&6 +else + ac_check_lib_save_LIBS=$LIBS +LIBS="-lsvld $LIBS" +cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ + +/* Override any GCC internal prototype to avoid an error. + Use char because int might match the return type of a GCC + builtin and then its argument prototype would still apply. */ +#ifdef __cplusplus +extern "C" +#endif +char dlopen (); +int +main () +{ +return dlopen (); + ; + return 0; +} +_ACEOF +if ac_fn_c_try_link "$LINENO"; then : + ac_cv_lib_svld_dlopen=yes +else + ac_cv_lib_svld_dlopen=no +fi +rm -f core conftest.err conftest.$ac_objext \ + conftest$ac_exeext conftest.$ac_ext +LIBS=$ac_check_lib_save_LIBS +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_svld_dlopen" >&5 +$as_echo "$ac_cv_lib_svld_dlopen" >&6; } +if test "x$ac_cv_lib_svld_dlopen" = xyes; then : + lt_cv_dlopen=dlopen lt_cv_dlopen_libs=-lsvld +else + { $as_echo "$as_me:${as_lineno-$LINENO}: checking for dld_link in -ldld" >&5 +$as_echo_n "checking for dld_link in -ldld... " >&6; } +if ${ac_cv_lib_dld_dld_link+:} false; then : + $as_echo_n "(cached) " >&6 +else + ac_check_lib_save_LIBS=$LIBS +LIBS="-ldld $LIBS" +cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ + +/* Override any GCC internal prototype to avoid an error. + Use char because int might match the return type of a GCC + builtin and then its argument prototype would still apply. */ +#ifdef __cplusplus +extern "C" +#endif +char dld_link (); +int +main () +{ +return dld_link (); + ; + return 0; +} +_ACEOF +if ac_fn_c_try_link "$LINENO"; then : + ac_cv_lib_dld_dld_link=yes +else + ac_cv_lib_dld_dld_link=no +fi +rm -f core conftest.err conftest.$ac_objext \ + conftest$ac_exeext conftest.$ac_ext +LIBS=$ac_check_lib_save_LIBS +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_dld_dld_link" >&5 +$as_echo "$ac_cv_lib_dld_dld_link" >&6; } +if test "x$ac_cv_lib_dld_dld_link" = xyes; then : + lt_cv_dlopen=dld_link lt_cv_dlopen_libs=-ldld +fi + + +fi + + +fi + + +fi + + +fi + + +fi + + ;; + esac + + if test no = "$lt_cv_dlopen"; then + enable_dlopen=no + else + enable_dlopen=yes + fi + + case $lt_cv_dlopen in + dlopen) + save_CPPFLAGS=$CPPFLAGS + test yes = "$ac_cv_header_dlfcn_h" && CPPFLAGS="$CPPFLAGS -DHAVE_DLFCN_H" + + save_LDFLAGS=$LDFLAGS + wl=$lt_prog_compiler_wl eval LDFLAGS=\"\$LDFLAGS $export_dynamic_flag_spec\" + + save_LIBS=$LIBS + LIBS="$lt_cv_dlopen_libs $LIBS" + + { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether a program can dlopen itself" >&5 +$as_echo_n "checking whether a program can dlopen itself... " >&6; } +if ${lt_cv_dlopen_self+:} false; then : + $as_echo_n "(cached) " >&6 +else + if test yes = "$cross_compiling"; then : + lt_cv_dlopen_self=cross +else + lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2 + lt_status=$lt_dlunknown + cat > conftest.$ac_ext <<_LT_EOF +#line $LINENO "configure" +#include "confdefs.h" + +#if HAVE_DLFCN_H +#include +#endif + +#include + +#ifdef RTLD_GLOBAL +# define LT_DLGLOBAL RTLD_GLOBAL +#else +# ifdef DL_GLOBAL +# define LT_DLGLOBAL DL_GLOBAL +# else +# define LT_DLGLOBAL 0 +# endif +#endif + +/* We may have to define LT_DLLAZY_OR_NOW in the command line if we + find out it does not work in some platform. */ +#ifndef LT_DLLAZY_OR_NOW +# ifdef RTLD_LAZY +# define LT_DLLAZY_OR_NOW RTLD_LAZY +# else +# ifdef DL_LAZY +# define LT_DLLAZY_OR_NOW DL_LAZY +# else +# ifdef RTLD_NOW +# define LT_DLLAZY_OR_NOW RTLD_NOW +# else +# ifdef DL_NOW +# define LT_DLLAZY_OR_NOW DL_NOW +# else +# define LT_DLLAZY_OR_NOW 0 +# endif +# endif +# endif +# endif +#endif + +/* When -fvisibility=hidden is used, assume the code has been annotated + correspondingly for the symbols needed. */ +#if defined __GNUC__ && (((__GNUC__ == 3) && (__GNUC_MINOR__ >= 3)) || (__GNUC__ > 3)) +int fnord () __attribute__((visibility("default"))); +#endif + +int fnord () { return 42; } +int main () +{ + void *self = dlopen (0, LT_DLGLOBAL|LT_DLLAZY_OR_NOW); + int status = $lt_dlunknown; + + if (self) + { + if (dlsym (self,"fnord")) status = $lt_dlno_uscore; + else + { + if (dlsym( self,"_fnord")) status = $lt_dlneed_uscore; + else puts (dlerror ()); + } + /* dlclose (self); */ + } + else + puts (dlerror ()); + + return status; +} +_LT_EOF + if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5 + (eval $ac_link) 2>&5 + ac_status=$? + $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 + test $ac_status = 0; } && test -s "conftest$ac_exeext" 2>/dev/null; then + (./conftest; exit; ) >&5 2>/dev/null + lt_status=$? + case x$lt_status in + x$lt_dlno_uscore) lt_cv_dlopen_self=yes ;; + x$lt_dlneed_uscore) lt_cv_dlopen_self=yes ;; + x$lt_dlunknown|x*) lt_cv_dlopen_self=no ;; + esac + else : + # compilation failed + lt_cv_dlopen_self=no + fi +fi +rm -fr conftest* + + +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_dlopen_self" >&5 +$as_echo "$lt_cv_dlopen_self" >&6; } + + if test yes = "$lt_cv_dlopen_self"; then + wl=$lt_prog_compiler_wl eval LDFLAGS=\"\$LDFLAGS $lt_prog_compiler_static\" + { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether a statically linked program can dlopen itself" >&5 +$as_echo_n "checking whether a statically linked program can dlopen itself... " >&6; } +if ${lt_cv_dlopen_self_static+:} false; then : + $as_echo_n "(cached) " >&6 +else + if test yes = "$cross_compiling"; then : + lt_cv_dlopen_self_static=cross +else + lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2 + lt_status=$lt_dlunknown + cat > conftest.$ac_ext <<_LT_EOF +#line $LINENO "configure" +#include "confdefs.h" + +#if HAVE_DLFCN_H +#include +#endif + +#include + +#ifdef RTLD_GLOBAL +# define LT_DLGLOBAL RTLD_GLOBAL +#else +# ifdef DL_GLOBAL +# define LT_DLGLOBAL DL_GLOBAL +# else +# define LT_DLGLOBAL 0 +# endif +#endif + +/* We may have to define LT_DLLAZY_OR_NOW in the command line if we + find out it does not work in some platform. */ +#ifndef LT_DLLAZY_OR_NOW +# ifdef RTLD_LAZY +# define LT_DLLAZY_OR_NOW RTLD_LAZY +# else +# ifdef DL_LAZY +# define LT_DLLAZY_OR_NOW DL_LAZY +# else +# ifdef RTLD_NOW +# define LT_DLLAZY_OR_NOW RTLD_NOW +# else +# ifdef DL_NOW +# define LT_DLLAZY_OR_NOW DL_NOW +# else +# define LT_DLLAZY_OR_NOW 0 +# endif +# endif +# endif +# endif +#endif + +/* When -fvisibility=hidden is used, assume the code has been annotated + correspondingly for the symbols needed. */ +#if defined __GNUC__ && (((__GNUC__ == 3) && (__GNUC_MINOR__ >= 3)) || (__GNUC__ > 3)) +int fnord () __attribute__((visibility("default"))); +#endif + +int fnord () { return 42; } +int main () +{ + void *self = dlopen (0, LT_DLGLOBAL|LT_DLLAZY_OR_NOW); + int status = $lt_dlunknown; + + if (self) + { + if (dlsym (self,"fnord")) status = $lt_dlno_uscore; + else + { + if (dlsym( self,"_fnord")) status = $lt_dlneed_uscore; + else puts (dlerror ()); + } + /* dlclose (self); */ + } + else + puts (dlerror ()); + + return status; +} +_LT_EOF + if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5 + (eval $ac_link) 2>&5 + ac_status=$? + $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 + test $ac_status = 0; } && test -s "conftest$ac_exeext" 2>/dev/null; then + (./conftest; exit; ) >&5 2>/dev/null + lt_status=$? + case x$lt_status in + x$lt_dlno_uscore) lt_cv_dlopen_self_static=yes ;; + x$lt_dlneed_uscore) lt_cv_dlopen_self_static=yes ;; + x$lt_dlunknown|x*) lt_cv_dlopen_self_static=no ;; + esac + else : + # compilation failed + lt_cv_dlopen_self_static=no + fi +fi +rm -fr conftest* + + +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_dlopen_self_static" >&5 +$as_echo "$lt_cv_dlopen_self_static" >&6; } + fi + + CPPFLAGS=$save_CPPFLAGS + LDFLAGS=$save_LDFLAGS + LIBS=$save_LIBS + ;; + esac + + case $lt_cv_dlopen_self in + yes|no) enable_dlopen_self=$lt_cv_dlopen_self ;; + *) enable_dlopen_self=unknown ;; + esac + + case $lt_cv_dlopen_self_static in + yes|no) enable_dlopen_self_static=$lt_cv_dlopen_self_static ;; + *) enable_dlopen_self_static=unknown ;; + esac +fi + + + + + + + + + + + + + + + + + +striplib= +old_striplib= +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether stripping libraries is possible" >&5 +$as_echo_n "checking whether stripping libraries is possible... " >&6; } +if test -n "$STRIP" && $STRIP -V 2>&1 | $GREP "GNU strip" >/dev/null; then + test -z "$old_striplib" && old_striplib="$STRIP --strip-debug" + test -z "$striplib" && striplib="$STRIP --strip-unneeded" + { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5 +$as_echo "yes" >&6; } +else +# FIXME - insert some real tests, host_os isn't really good enough + case $host_os in + darwin*) + if test -n "$STRIP"; then + striplib="$STRIP -x" + old_striplib="$STRIP -S" + { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5 +$as_echo "yes" >&6; } + else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } + fi + ;; + *) + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } + ;; + esac +fi + + + + + + + + + + + + + # Report what library types will actually be built + { $as_echo "$as_me:${as_lineno-$LINENO}: checking if libtool supports shared libraries" >&5 +$as_echo_n "checking if libtool supports shared libraries... " >&6; } + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $can_build_shared" >&5 +$as_echo "$can_build_shared" >&6; } + + { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to build shared libraries" >&5 +$as_echo_n "checking whether to build shared libraries... " >&6; } + test no = "$can_build_shared" && enable_shared=no + + # On AIX, shared libraries and static libraries use the same namespace, and + # are all built from PIC. + case $host_os in + aix3*) + test yes = "$enable_shared" && enable_static=no + if test -n "$RANLIB"; then + archive_cmds="$archive_cmds~\$RANLIB \$lib" + postinstall_cmds='$RANLIB $lib' + fi + ;; + + aix[4-9]*) + if test ia64 != "$host_cpu"; then + case $enable_shared,$with_aix_soname,$aix_use_runtimelinking in + yes,aix,yes) ;; # shared object as lib.so file only + yes,svr4,*) ;; # shared object as lib.so archive member only + yes,*) enable_static=no ;; # shared object in lib.a archive as well + esac + fi + ;; + esac + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $enable_shared" >&5 +$as_echo "$enable_shared" >&6; } + + { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to build static libraries" >&5 +$as_echo_n "checking whether to build static libraries... " >&6; } + # Make sure either enable_shared or enable_static is yes. + test yes = "$enable_shared" || enable_static=yes + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $enable_static" >&5 +$as_echo "$enable_static" >&6; } + + + + +fi +ac_ext=c +ac_cpp='$CPP $CPPFLAGS' +ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5' +ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5' +ac_compiler_gnu=$ac_cv_c_compiler_gnu + +CC=$lt_save_CC + + + + + + + + + + + + + + + + ac_config_commands="$ac_config_commands libtool" + + + + +# Only expand once: + + + + +# Some awks crash when confronted with pnglibconf.dfa, do a test run now +# to make sure this doesn't happen +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking that AWK works" >&5 +$as_echo_n "checking that AWK works... " >&6; } +if ${AWK} -f ${srcdir}/scripts/options.awk out="/dev/null" version=search\ + ${srcdir}/pngconf.h ${srcdir}/scripts/pnglibconf.dfa\ + ${srcdir}/pngusr.dfa 1>&2 +then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: ok" >&5 +$as_echo "ok" >&6; } +else + { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5 +$as_echo "$as_me: error: in \`$ac_pwd':" >&2;} +as_fn_error 1 "failed +See \`config.log' for more details" "$LINENO" 5; } +fi + +# This is a remnant of the old cc -E validation, where it may have been +# necessary to use a different preprocessor for .dfn files +DFNCPP="$CPP" + + +# -Werror cannot be passed to GCC in CFLAGS because configure will fail (it +# checks the compiler with a program that generates a warning), add the +# following option to deal with this + +# Check whether --enable-werror was given. +if test "${enable_werror+set}" = set; then : + enableval=$enable_werror; test "$enable_werror" = "yes" && enable_werror="-Werror" + if test "$enable_werror" != "no"; then + sav_CFLAGS="$CFLAGS" + CFLAGS="$enable_werror $CFLAGS" + { $as_echo "$as_me:${as_lineno-$LINENO}: checking if the compiler allows $enable_werror" >&5 +$as_echo_n "checking if the compiler allows $enable_werror... " >&6; } + cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ + + int main(int argc, char **argv){ + return argv[argc-1][0]; + } +_ACEOF +if ac_fn_c_try_compile "$LINENO"; then : + { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5 +$as_echo "yes" >&6; } + PNG_COPTS="$PNG_COPTS $enable_werror" +else + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi +rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext + CFLAGS="$sav_CFLAGS" + fi +fi + + +# For GCC 5 the default mode for C is -std=gnu11 instead of -std=gnu89 +# In pngpriv.h we request just the POSIX 1003.1 and C89 APIs by defining _POSIX_SOURCE to 1 +# This is incompatible with the new default mode, so we test for that and force the +# "-std=c89" compiler option: +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if we need to force back C standard to C89" >&5 +$as_echo_n "checking if we need to force back C standard to C89... " >&6; } +cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ + + #define _POSIX_SOURCE 1 + #include + +int +main () +{ + + ; + return 0; +} +_ACEOF +if ac_fn_c_try_compile "$LINENO"; then : + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +else + + if test "x$GCC" != "xyes"; then + as_fn_error $? "Forcing back to C89 is required but the flags are only known for GCC" "$LINENO" 5 + fi + { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5 +$as_echo "yes" >&6; } + CFLAGS="$CFLAGS -std=c89" + +fi +rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext + +# Checks for header files. +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for ANSI C header files" >&5 +$as_echo_n "checking for ANSI C header files... " >&6; } +if ${ac_cv_header_stdc+:} false; then : + $as_echo_n "(cached) " >&6 +else + cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ +#include +#include +#include +#include + +int +main () +{ + + ; + return 0; +} +_ACEOF +if ac_fn_c_try_compile "$LINENO"; then : + ac_cv_header_stdc=yes +else + ac_cv_header_stdc=no +fi +rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext + +if test $ac_cv_header_stdc = yes; then + # SunOS 4.x string.h does not declare mem*, contrary to ANSI. + cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ +#include + +_ACEOF +if (eval "$ac_cpp conftest.$ac_ext") 2>&5 | + $EGREP "memchr" >/dev/null 2>&1; then : + +else + ac_cv_header_stdc=no +fi +rm -f conftest* + +fi + +if test $ac_cv_header_stdc = yes; then + # ISC 2.0.2 stdlib.h does not declare free, contrary to ANSI. + cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ +#include + +_ACEOF +if (eval "$ac_cpp conftest.$ac_ext") 2>&5 | + $EGREP "free" >/dev/null 2>&1; then : + +else + ac_cv_header_stdc=no +fi +rm -f conftest* + +fi + +if test $ac_cv_header_stdc = yes; then + # /bin/cc in Irix-4.0.5 gets non-ANSI ctype macros unless using -ansi. + if test "$cross_compiling" = yes; then : + : +else + cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ +#include +#include +#if ((' ' & 0x0FF) == 0x020) +# define ISLOWER(c) ('a' <= (c) && (c) <= 'z') +# define TOUPPER(c) (ISLOWER(c) ? 'A' + ((c) - 'a') : (c)) +#else +# define ISLOWER(c) \ + (('a' <= (c) && (c) <= 'i') \ + || ('j' <= (c) && (c) <= 'r') \ + || ('s' <= (c) && (c) <= 'z')) +# define TOUPPER(c) (ISLOWER(c) ? ((c) | 0x40) : (c)) +#endif + +#define XOR(e, f) (((e) && !(f)) || (!(e) && (f))) +int +main () +{ + int i; + for (i = 0; i < 256; i++) + if (XOR (islower (i), ISLOWER (i)) + || toupper (i) != TOUPPER (i)) + return 2; + return 0; +} +_ACEOF +if ac_fn_c_try_run "$LINENO"; then : + +else + ac_cv_header_stdc=no +fi +rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \ + conftest.$ac_objext conftest.beam conftest.$ac_ext +fi + +fi +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_header_stdc" >&5 +$as_echo "$ac_cv_header_stdc" >&6; } +if test $ac_cv_header_stdc = yes; then + +$as_echo "#define STDC_HEADERS 1" >>confdefs.h + +fi + + +# Checks for typedefs, structures, and compiler characteristics. +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for an ANSI C-conforming const" >&5 +$as_echo_n "checking for an ANSI C-conforming const... " >&6; } +if ${ac_cv_c_const+:} false; then : + $as_echo_n "(cached) " >&6 +else + cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ + +int +main () +{ + +#ifndef __cplusplus + /* Ultrix mips cc rejects this sort of thing. */ + typedef int charset[2]; + const charset cs = { 0, 0 }; + /* SunOS 4.1.1 cc rejects this. */ + char const *const *pcpcc; + char **ppc; + /* NEC SVR4.0.2 mips cc rejects this. */ + struct point {int x, y;}; + static struct point const zero = {0,0}; + /* AIX XL C 1.02.0.0 rejects this. + It does not let you subtract one const X* pointer from another in + an arm of an if-expression whose if-part is not a constant + expression */ + const char *g = "string"; + pcpcc = &g + (g ? g-g : 0); + /* HPUX 7.0 cc rejects these. */ + ++pcpcc; + ppc = (char**) pcpcc; + pcpcc = (char const *const *) ppc; + { /* SCO 3.2v4 cc rejects this sort of thing. */ + char tx; + char *t = &tx; + char const *s = 0 ? (char *) 0 : (char const *) 0; + + *t++ = 0; + if (s) return 0; + } + { /* Someone thinks the Sun supposedly-ANSI compiler will reject this. */ + int x[] = {25, 17}; + const int *foo = &x[0]; + ++foo; + } + { /* Sun SC1.0 ANSI compiler rejects this -- but not the above. */ + typedef const int *iptr; + iptr p = 0; + ++p; + } + { /* AIX XL C 1.02.0.0 rejects this sort of thing, saying + "k.c", line 2.27: 1506-025 (S) Operand must be a modifiable lvalue. */ + struct s { int j; const int *ap[3]; } bx; + struct s *b = &bx; b->j = 5; + } + { /* ULTRIX-32 V3.1 (Rev 9) vcc rejects this */ + const int foo = 10; + if (!foo) return 0; + } + return !cs[0] && !zero.x; +#endif + + ; + return 0; +} +_ACEOF +if ac_fn_c_try_compile "$LINENO"; then : + ac_cv_c_const=yes +else + ac_cv_c_const=no +fi +rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_const" >&5 +$as_echo "$ac_cv_c_const" >&6; } +if test $ac_cv_c_const = no; then + +$as_echo "#define const /**/" >>confdefs.h + +fi + +ac_fn_c_check_type "$LINENO" "size_t" "ac_cv_type_size_t" "$ac_includes_default" +if test "x$ac_cv_type_size_t" = xyes; then : + +else + +cat >>confdefs.h <<_ACEOF +#define size_t unsigned int +_ACEOF + +fi + +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether struct tm is in sys/time.h or time.h" >&5 +$as_echo_n "checking whether struct tm is in sys/time.h or time.h... " >&6; } +if ${ac_cv_struct_tm+:} false; then : + $as_echo_n "(cached) " >&6 +else + cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ +#include +#include + +int +main () +{ +struct tm tm; + int *p = &tm.tm_sec; + return !p; + ; + return 0; +} +_ACEOF +if ac_fn_c_try_compile "$LINENO"; then : + ac_cv_struct_tm=time.h +else + ac_cv_struct_tm=sys/time.h +fi +rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_struct_tm" >&5 +$as_echo "$ac_cv_struct_tm" >&6; } +if test $ac_cv_struct_tm = sys/time.h; then + +$as_echo "#define TM_IN_SYS_TIME 1" >>confdefs.h + +fi + +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for C/C++ restrict keyword" >&5 +$as_echo_n "checking for C/C++ restrict keyword... " >&6; } +if ${ac_cv_c_restrict+:} false; then : + $as_echo_n "(cached) " >&6 +else + ac_cv_c_restrict=no + # The order here caters to the fact that C++ does not require restrict. + for ac_kw in __restrict __restrict__ _Restrict restrict; do + cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ +typedef int * int_ptr; + int foo (int_ptr $ac_kw ip) { + return ip[0]; + } +int +main () +{ +int s[1]; + int * $ac_kw t = s; + t[0] = 0; + return foo(t) + ; + return 0; +} +_ACEOF +if ac_fn_c_try_compile "$LINENO"; then : + ac_cv_c_restrict=$ac_kw +fi +rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext + test "$ac_cv_c_restrict" != no && break + done + +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_restrict" >&5 +$as_echo "$ac_cv_c_restrict" >&6; } + + case $ac_cv_c_restrict in + restrict) ;; + no) $as_echo "#define restrict /**/" >>confdefs.h + ;; + *) cat >>confdefs.h <<_ACEOF +#define restrict $ac_cv_c_restrict +_ACEOF + ;; + esac + + +# Checks for library functions. +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for working strtod" >&5 +$as_echo_n "checking for working strtod... " >&6; } +if ${ac_cv_func_strtod+:} false; then : + $as_echo_n "(cached) " >&6 +else + if test "$cross_compiling" = yes; then : + ac_cv_func_strtod=no +else + cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ + +$ac_includes_default +#ifndef strtod +double strtod (); +#endif +int +main() +{ + { + /* Some versions of Linux strtod mis-parse strings with leading '+'. */ + char *string = " +69"; + char *term; + double value; + value = strtod (string, &term); + if (value != 69 || term != (string + 4)) + return 1; + } + + { + /* Under Solaris 2.4, strtod returns the wrong value for the + terminating character under some conditions. */ + char *string = "NaN"; + char *term; + strtod (string, &term); + if (term != string && *(term - 1) == 0) + return 1; + } + return 0; +} + +_ACEOF +if ac_fn_c_try_run "$LINENO"; then : + ac_cv_func_strtod=yes +else + ac_cv_func_strtod=no +fi +rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \ + conftest.$ac_objext conftest.beam conftest.$ac_ext +fi + +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_func_strtod" >&5 +$as_echo "$ac_cv_func_strtod" >&6; } +if test $ac_cv_func_strtod = no; then + case " $LIBOBJS " in + *" strtod.$ac_objext "* ) ;; + *) LIBOBJS="$LIBOBJS strtod.$ac_objext" + ;; +esac + +ac_fn_c_check_func "$LINENO" "pow" "ac_cv_func_pow" +if test "x$ac_cv_func_pow" = xyes; then : + +fi + +if test $ac_cv_func_pow = no; then + { $as_echo "$as_me:${as_lineno-$LINENO}: checking for pow in -lm" >&5 +$as_echo_n "checking for pow in -lm... " >&6; } +if ${ac_cv_lib_m_pow+:} false; then : + $as_echo_n "(cached) " >&6 +else + ac_check_lib_save_LIBS=$LIBS +LIBS="-lm $LIBS" +cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ + +/* Override any GCC internal prototype to avoid an error. + Use char because int might match the return type of a GCC + builtin and then its argument prototype would still apply. */ +#ifdef __cplusplus +extern "C" +#endif +char pow (); +int +main () +{ +return pow (); + ; + return 0; +} +_ACEOF +if ac_fn_c_try_link "$LINENO"; then : + ac_cv_lib_m_pow=yes +else + ac_cv_lib_m_pow=no +fi +rm -f core conftest.err conftest.$ac_objext \ + conftest$ac_exeext conftest.$ac_ext +LIBS=$ac_check_lib_save_LIBS +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_m_pow" >&5 +$as_echo "$ac_cv_lib_m_pow" >&6; } +if test "x$ac_cv_lib_m_pow" = xyes; then : + POW_LIB=-lm +else + { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: cannot find library containing definition of pow" >&5 +$as_echo "$as_me: WARNING: cannot find library containing definition of pow" >&2;} +fi + +fi + +fi + +for ac_func in pow +do : + ac_fn_c_check_func "$LINENO" "pow" "ac_cv_func_pow" +if test "x$ac_cv_func_pow" = xyes; then : + cat >>confdefs.h <<_ACEOF +#define HAVE_POW 1 +_ACEOF + +else + { $as_echo "$as_me:${as_lineno-$LINENO}: checking for pow in -lm" >&5 +$as_echo_n "checking for pow in -lm... " >&6; } +if ${ac_cv_lib_m_pow+:} false; then : + $as_echo_n "(cached) " >&6 +else + ac_check_lib_save_LIBS=$LIBS +LIBS="-lm $LIBS" +cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ + +/* Override any GCC internal prototype to avoid an error. + Use char because int might match the return type of a GCC + builtin and then its argument prototype would still apply. */ +#ifdef __cplusplus +extern "C" +#endif +char pow (); +int +main () +{ +return pow (); + ; + return 0; +} +_ACEOF +if ac_fn_c_try_link "$LINENO"; then : + ac_cv_lib_m_pow=yes +else + ac_cv_lib_m_pow=no +fi +rm -f core conftest.err conftest.$ac_objext \ + conftest$ac_exeext conftest.$ac_ext +LIBS=$ac_check_lib_save_LIBS +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_m_pow" >&5 +$as_echo "$ac_cv_lib_m_pow" >&6; } +if test "x$ac_cv_lib_m_pow" = xyes; then : + cat >>confdefs.h <<_ACEOF +#define HAVE_LIBM 1 +_ACEOF + + LIBS="-lm $LIBS" + +else + as_fn_error $? "cannot find pow" "$LINENO" 5 +fi + +fi +done + + +# Some later POSIX 1003.1 functions are required for test programs, failure here +# is soft (the corresponding test program is not built). +ac_fn_c_check_func "$LINENO" "clock_gettime" "ac_cv_func_clock_gettime" +if test "x$ac_cv_func_clock_gettime" = xyes; then : + +else + { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: not building timepng" >&5 +$as_echo "$as_me: WARNING: not building timepng" >&2;} +fi + + if test "$ac_cv_func_clock_gettime" = "yes"; then + HAVE_CLOCK_GETTIME_TRUE= + HAVE_CLOCK_GETTIME_FALSE='#' +else + HAVE_CLOCK_GETTIME_TRUE='#' + HAVE_CLOCK_GETTIME_FALSE= +fi + + + +# Check whether --with-zlib-prefix was given. +if test "${with_zlib_prefix+set}" = set; then : + withval=$with_zlib_prefix; ZPREFIX=${withval} +else + ZPREFIX='z_' +fi + +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for zlibVersion in -lz" >&5 +$as_echo_n "checking for zlibVersion in -lz... " >&6; } +if ${ac_cv_lib_z_zlibVersion+:} false; then : + $as_echo_n "(cached) " >&6 +else + ac_check_lib_save_LIBS=$LIBS +LIBS="-lz $LIBS" +cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ + +/* Override any GCC internal prototype to avoid an error. + Use char because int might match the return type of a GCC + builtin and then its argument prototype would still apply. */ +#ifdef __cplusplus +extern "C" +#endif +char zlibVersion (); +int +main () +{ +return zlibVersion (); + ; + return 0; +} +_ACEOF +if ac_fn_c_try_link "$LINENO"; then : + ac_cv_lib_z_zlibVersion=yes +else + ac_cv_lib_z_zlibVersion=no +fi +rm -f core conftest.err conftest.$ac_objext \ + conftest$ac_exeext conftest.$ac_ext +LIBS=$ac_check_lib_save_LIBS +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_z_zlibVersion" >&5 +$as_echo "$ac_cv_lib_z_zlibVersion" >&6; } +if test "x$ac_cv_lib_z_zlibVersion" = xyes; then : + cat >>confdefs.h <<_ACEOF +#define HAVE_LIBZ 1 +_ACEOF + + LIBS="-lz $LIBS" + +else + as_ac_Lib=`$as_echo "ac_cv_lib_z_${ZPREFIX}zlibVersion" | $as_tr_sh` +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for ${ZPREFIX}zlibVersion in -lz" >&5 +$as_echo_n "checking for ${ZPREFIX}zlibVersion in -lz... " >&6; } +if eval \${$as_ac_Lib+:} false; then : + $as_echo_n "(cached) " >&6 +else + ac_check_lib_save_LIBS=$LIBS +LIBS="-lz $LIBS" +cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ + +/* Override any GCC internal prototype to avoid an error. + Use char because int might match the return type of a GCC + builtin and then its argument prototype would still apply. */ +#ifdef __cplusplus +extern "C" +#endif +char ${ZPREFIX}zlibVersion (); +int +main () +{ +return ${ZPREFIX}zlibVersion (); + ; + return 0; +} +_ACEOF +if ac_fn_c_try_link "$LINENO"; then : + eval "$as_ac_Lib=yes" +else + eval "$as_ac_Lib=no" +fi +rm -f core conftest.err conftest.$ac_objext \ + conftest$ac_exeext conftest.$ac_ext +LIBS=$ac_check_lib_save_LIBS +fi +eval ac_res=\$$as_ac_Lib + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5 +$as_echo "$ac_res" >&6; } +if eval test \"x\$"$as_ac_Lib"\" = x"yes"; then : + cat >>confdefs.h <<_ACEOF +#define HAVE_LIBZ 1 +_ACEOF + + LIBS="-lz $LIBS" + +else + as_fn_error $? "zlib not installed" "$LINENO" 5 +fi + +fi + + +# The following is for pngvalid, to ensure it catches FP errors even on +# platforms that don't enable FP exceptions, the function appears in the math +# library (typically), it's not an error if it is not found. +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for feenableexcept in -lm" >&5 +$as_echo_n "checking for feenableexcept in -lm... " >&6; } +if ${ac_cv_lib_m_feenableexcept+:} false; then : + $as_echo_n "(cached) " >&6 +else + ac_check_lib_save_LIBS=$LIBS +LIBS="-lm $LIBS" +cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ + +/* Override any GCC internal prototype to avoid an error. + Use char because int might match the return type of a GCC + builtin and then its argument prototype would still apply. */ +#ifdef __cplusplus +extern "C" +#endif +char feenableexcept (); +int +main () +{ +return feenableexcept (); + ; + return 0; +} +_ACEOF +if ac_fn_c_try_link "$LINENO"; then : + ac_cv_lib_m_feenableexcept=yes +else + ac_cv_lib_m_feenableexcept=no +fi +rm -f core conftest.err conftest.$ac_objext \ + conftest$ac_exeext conftest.$ac_ext +LIBS=$ac_check_lib_save_LIBS +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_m_feenableexcept" >&5 +$as_echo "$ac_cv_lib_m_feenableexcept" >&6; } +if test "x$ac_cv_lib_m_feenableexcept" = xyes; then : + cat >>confdefs.h <<_ACEOF +#define HAVE_LIBM 1 +_ACEOF + + LIBS="-lm $LIBS" + +fi + +for ac_func in feenableexcept +do : + ac_fn_c_check_func "$LINENO" "feenableexcept" "ac_cv_func_feenableexcept" +if test "x$ac_cv_func_feenableexcept" = xyes; then : + cat >>confdefs.h <<_ACEOF +#define HAVE_FEENABLEEXCEPT 1 +_ACEOF + +fi +done + + +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if using Solaris linker" >&5 +$as_echo_n "checking if using Solaris linker... " >&6; } +SLD=`$LD --version 2>&1 | grep Solaris` +if test "$SLD"; then + have_solaris_ld=yes + { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5 +$as_echo "yes" >&6; } +else + have_solaris_ld=no + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +fi + if test "$have_solaris_ld" = "yes"; then + HAVE_SOLARIS_LD_TRUE= + HAVE_SOLARIS_LD_FALSE='#' +else + HAVE_SOLARIS_LD_TRUE='#' + HAVE_SOLARIS_LD_FALSE= +fi + + +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if libraries can be versioned" >&5 +$as_echo_n "checking if libraries can be versioned... " >&6; } +# Special case for PE/COFF platforms: ld reports +# support for version-script, but doesn't actually +# DO anything with it. +case $host in +*cygwin* | *mingw32* | *interix* ) + have_ld_version_script=no + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } +;; +* ) + +if test "$have_solaris_ld" = "yes"; then + GLD=`$LD --help < /dev/null 2>&1 | grep 'M mapfile'` +else + GLD=`$LD --help < /dev/null 2>/dev/null | grep version-script` +fi + +if test "$GLD"; then + have_ld_version_script=yes + { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5 +$as_echo "yes" >&6; } +else + have_ld_version_script=no + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } + { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: *** You have not enabled versioned symbols." >&5 +$as_echo "$as_me: WARNING: *** You have not enabled versioned symbols." >&2;} +fi +;; +esac + + if test "$have_ld_version_script" = "yes"; then + HAVE_LD_VERSION_SCRIPT_TRUE= + HAVE_LD_VERSION_SCRIPT_FALSE='#' +else + HAVE_LD_VERSION_SCRIPT_TRUE='#' + HAVE_LD_VERSION_SCRIPT_FALSE= +fi + + +if test "$have_ld_version_script" = "yes"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: checking for symbol prefix" >&5 +$as_echo_n "checking for symbol prefix... " >&6; } + SYMBOL_PREFIX=`echo "PREFIX=__USER_LABEL_PREFIX__" \ + | ${CPP-${CC-gcc} -E} - 2>&1 \ + | ${EGREP-grep} "^PREFIX=" \ + | ${SED-sed} -e "s:^PREFIX=::" -e "s:__USER_LABEL_PREFIX__::"` + + { $as_echo "$as_me:${as_lineno-$LINENO}: result: $SYMBOL_PREFIX" >&5 +$as_echo "$SYMBOL_PREFIX" >&6; } +fi + +# Substitutions for .in files + + + + + +# Additional arguments (and substitutions) +# Allow the pkg-config directory to be set + +# Check whether --with-pkgconfigdir was given. +if test "${with_pkgconfigdir+set}" = set; then : + withval=$with_pkgconfigdir; pkgconfigdir=${withval} +else + pkgconfigdir='${libdir}/pkgconfig' +fi + + + +{ $as_echo "$as_me:${as_lineno-$LINENO}: pkgconfig directory is ${pkgconfigdir}" >&5 +$as_echo "$as_me: pkgconfig directory is ${pkgconfigdir}" >&6;} + +# Make the *-config binary config scripts optional + +# Check whether --with-binconfigs was given. +if test "${with_binconfigs+set}" = set; then : + withval=$with_binconfigs; if test "${withval}" = no; then + binconfigs= + { $as_echo "$as_me:${as_lineno-$LINENO}: libpng-config scripts will not be built" >&5 +$as_echo "$as_me: libpng-config scripts will not be built" >&6;} + else + binconfigs='${binconfigs}' + fi +else + binconfigs='${binconfigs}' +fi + + + +# Support for prefixes to the API function names; this will generate defines +# at the start of the build to rename exported library functions + +# Check whether --with-libpng-prefix was given. +if test "${with_libpng_prefix+set}" = set; then : + withval=$with_libpng_prefix; if test "${withval:-no}" != "no"; then + PNG_PREFIX=${withval} + + fi +fi + + if test "${with_libpng_prefix:-no}" != "no"; then + DO_PNG_PREFIX_TRUE= + DO_PNG_PREFIX_FALSE='#' +else + DO_PNG_PREFIX_TRUE='#' + DO_PNG_PREFIX_FALSE= +fi + + +# Control over what links are made for installed files. Versioned files are +# always installed, when the following options are turned on corresponding +# unversioned links are also created (normally as symbolic links): +# Check whether --enable-unversioned-links was given. +if test "${enable_unversioned_links+set}" = set; then : + enableval=$enable_unversioned_links; +fi + + +# The AM_CONDITIONAL test is written so that the default is enabled; +# --disable-unversioned-links must be given to turn the option off. + if test "$enable_unversioned_links" != "no"; then + DO_INSTALL_LINKS_TRUE= + DO_INSTALL_LINKS_FALSE='#' +else + DO_INSTALL_LINKS_TRUE='#' + DO_INSTALL_LINKS_FALSE= +fi + + +# Check whether --enable-unversioned-libpng-pc was given. +if test "${enable_unversioned_libpng_pc+set}" = set; then : + enableval=$enable_unversioned_libpng_pc; +fi + + if test "$enable_unversioned_libpng_pc" != "no"; then + DO_INSTALL_LIBPNG_PC_TRUE= + DO_INSTALL_LIBPNG_PC_FALSE='#' +else + DO_INSTALL_LIBPNG_PC_TRUE='#' + DO_INSTALL_LIBPNG_PC_FALSE= +fi + + +# Check whether --enable-unversioned-libpng-config was given. +if test "${enable_unversioned_libpng_config+set}" = set; then : + enableval=$enable_unversioned_libpng_config; +fi + + if test "$enable_unversioned_libpng_config" != "no"; then + DO_INSTALL_LIBPNG_CONFIG_TRUE= + DO_INSTALL_LIBPNG_CONFIG_FALSE='#' +else + DO_INSTALL_LIBPNG_CONFIG_TRUE='#' + DO_INSTALL_LIBPNG_CONFIG_FALSE= +fi + + +# HOST SPECIFIC OPTIONS +# ===================== +# +# DEFAULT +# ======= +# +# Check whether --enable-hardware-optimizations was given. +if test "${enable_hardware_optimizations+set}" = set; then : + enableval=$enable_hardware_optimizations; case "$enableval" in + no|off) + # disable hardware optimization on all systems: + enable_arm_neon=no + +$as_echo "#define PNG_ARM_NEON_OPT 0" >>confdefs.h + + enable_mips_msa=no + +$as_echo "#define PNG_MIPS_MSA_OPT 0" >>confdefs.h + + enable_powerpc_vsx=no + +$as_echo "#define PNG_POWERPC_VSX_OPT 0" >>confdefs.h + + enable_intel_sse=no + +$as_echo "#define PNG_INTEL_SSE_OPT 0" >>confdefs.h + + ;; + *) + # allow enabling hardware optimization on any system: + case "$host_cpu" in + arm*|aarch64*) + enable_arm_neon=yes + +$as_echo "#define PNG_ARM_NEON_OPT 0" >>confdefs.h + + ;; + mipsel*|mips64el*) + enable_mips_msa=yes + +$as_echo "#define PNG_MIPS_MSA_OPT 0" >>confdefs.h + + ;; + i?86|x86_64) + enable_intel_sse=yes + +$as_echo "#define PNG_INTEL_SSE_OPT 1" >>confdefs.h + + ;; + powerpc*|ppc64*) + enable_powerpc_vsx=yes + +$as_echo "#define PNG_POWERPC_VSX_OPT 2" >>confdefs.h + + ;; + esac + ;; + esac +fi + + +# ARM +# === +# +# ARM NEON (SIMD) support. + +# Check whether --enable-arm-neon was given. +if test "${enable_arm_neon+set}" = set; then : + enableval=$enable_arm_neon; case "$enableval" in + no|off) + # disable the default enabling on __ARM_NEON__ systems: + +$as_echo "#define PNG_ARM_NEON_OPT 0" >>confdefs.h + + # Prevent inclusion of the assembler files below: + enable_arm_neon=no;; + check) + +$as_echo "#define PNG_ARM_NEON_CHECK_SUPPORTED /**/" >>confdefs.h +;; + api) + +$as_echo "#define PNG_ARM_NEON_API_SUPPORTED /**/" >>confdefs.h +;; + yes|on) + +$as_echo "#define PNG_ARM_NEON_OPT 2" >>confdefs.h + + { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: --enable-arm-neon: please specify 'check' or 'api', if + you want the optimizations unconditionally pass -mfpu=neon + to the compiler." >&5 +$as_echo "$as_me: WARNING: --enable-arm-neon: please specify 'check' or 'api', if + you want the optimizations unconditionally pass -mfpu=neon + to the compiler." >&2;};; + *) + as_fn_error $? "--enable-arm-neon=${enable_arm_neon}: invalid value" "$LINENO" 5 + esac +fi + + +# Add ARM specific files to all builds where the host_cpu is arm ('arm*') or +# where ARM optimizations were explicitly requested (this allows a fallback if a +# future host CPU does not match 'arm*') + + if test "$enable_arm_neon" != 'no' && + case "$host_cpu" in + arm*|aarch64*) :;; + *) test "$enable_arm_neon" != '';; + esac; then + PNG_ARM_NEON_TRUE= + PNG_ARM_NEON_FALSE='#' +else + PNG_ARM_NEON_TRUE='#' + PNG_ARM_NEON_FALSE= +fi + + +# MIPS +# === +# +# MIPS MSA (SIMD) support. + +# Check whether --enable-mips-msa was given. +if test "${enable_mips_msa+set}" = set; then : + enableval=$enable_mips_msa; case "$enableval" in + no|off) + # disable the default enabling on __mips_msa systems: + +$as_echo "#define PNG_MIPS_MSA_OPT 0" >>confdefs.h + + # Prevent inclusion of the assembler files below: + enable_mips_msa=no;; + check) + +$as_echo "#define PNG_MIPS_MSA_CHECK_SUPPORTED /**/" >>confdefs.h +;; + api) + +$as_echo "#define PNG_MIPS_MSA_API_SUPPORTED /**/" >>confdefs.h +;; + yes|on) + +$as_echo "#define PNG_MIPS_MSA_OPT 2" >>confdefs.h + + { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: --enable-mips-msa: please specify 'check' or 'api', if + you want the optimizations unconditionally pass '-mmsa -mfp64' + to the compiler." >&5 +$as_echo "$as_me: WARNING: --enable-mips-msa: please specify 'check' or 'api', if + you want the optimizations unconditionally pass '-mmsa -mfp64' + to the compiler." >&2;};; + *) + as_fn_error $? "--enable-mips-msa=${enable_mips_msa}: invalid value" "$LINENO" 5 + esac +fi + + +# Add MIPS specific files to all builds where the host_cpu is mips ('mips*') or +# where MIPS optimizations were explicitly requested (this allows a fallback if a +# future host CPU does not match 'mips*') + + if test "$enable_mips_msa" != 'no' && + case "$host_cpu" in + mipsel*|mips64el*) :;; + esac; then + PNG_MIPS_MSA_TRUE= + PNG_MIPS_MSA_FALSE='#' +else + PNG_MIPS_MSA_TRUE='#' + PNG_MIPS_MSA_FALSE= +fi + + +# INTEL +# ===== +# +# INTEL SSE (SIMD) support. + +# Check whether --enable-intel-sse was given. +if test "${enable_intel_sse+set}" = set; then : + enableval=$enable_intel_sse; case "$enableval" in + no|off) + # disable the default enabling: + +$as_echo "#define PNG_INTEL_SSE_OPT 0" >>confdefs.h + + # Prevent inclusion of the assembler files below: + enable_intel_sse=no;; + yes|on) + +$as_echo "#define PNG_INTEL_SSE_OPT 1" >>confdefs.h +;; + *) + as_fn_error $? "--enable-intel-sse=${enable_intel_sse}: invalid value" "$LINENO" 5 + esac +fi + + +# Add Intel specific files to all builds where the host_cpu is Intel ('x86*') +# or where Intel optimizations were explicitly requested (this allows a +# fallback if a future host CPU does not match 'x86*') + if test "$enable_intel_sse" != 'no' && + case "$host_cpu" in + i?86|x86_64) :;; + *) test "$enable_intel_sse" != '';; + esac; then + PNG_INTEL_SSE_TRUE= + PNG_INTEL_SSE_FALSE='#' +else + PNG_INTEL_SSE_TRUE='#' + PNG_INTEL_SSE_FALSE= +fi + + +# PowerPC +# === +# +# PowerPC VSX (SIMD) support. + +# Check whether --enable-powerpc-vsx was given. +if test "${enable_powerpc_vsx+set}" = set; then : + enableval=$enable_powerpc_vsx; case "$enableval" in + no|off) + # disable the default enabling on __ppc64__ systems: + +$as_echo "#define PNG_POWERPC_VSX_OPT 0" >>confdefs.h + + # Prevent inclusion of the platform specific files below: + enable_powerpc_vsx=no;; + check) + +$as_echo "#define PNG_POWERPC_VSX_CHECK_SUPPORTED /**/" >>confdefs.h + + { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: --enable-powerpc-vsx Please check contrib/powerpc/README file + for the list of supported OSes." >&5 +$as_echo "$as_me: WARNING: --enable-powerpc-vsx Please check contrib/powerpc/README file + for the list of supported OSes." >&2;};; + api) + +$as_echo "#define PNG_POWERPC_VSX_API_SUPPORTED /**/" >>confdefs.h +;; + yes|on) + +$as_echo "#define PNG_POWERPC_VSX_OPT 2" >>confdefs.h + + { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: --enable-powerpc-vsx: please specify 'check' or 'api', if + you want the optimizations unconditionally pass '-maltivec -mvsx' + or '-mcpu=power8'to the compiler." >&5 +$as_echo "$as_me: WARNING: --enable-powerpc-vsx: please specify 'check' or 'api', if + you want the optimizations unconditionally pass '-maltivec -mvsx' + or '-mcpu=power8'to the compiler." >&2;};; + *) + as_fn_error $? "--enable-powerpc-vsx=${enable_powerpc_vsx}: invalid value" "$LINENO" 5 + esac +fi + + +# Add PowerPC specific files to all builds where the host_cpu is powerpc('powerpc*') or +# where POWERPC optimizations were explicitly requested (this allows a fallback if a +# future host CPU does not match 'powerpc*') + + if test "$enable_powerpc_vsx" != 'no' && + case "$host_cpu" in + powerpc*|ppc64*) :;; + esac; then + PNG_POWERPC_VSX_TRUE= + PNG_POWERPC_VSX_FALSE='#' +else + PNG_POWERPC_VSX_TRUE='#' + PNG_POWERPC_VSX_FALSE= +fi + + + +{ $as_echo "$as_me:${as_lineno-$LINENO}: Extra options for compiler: $PNG_COPTS" >&5 +$as_echo "$as_me: Extra options for compiler: $PNG_COPTS" >&6;} + +# Config files, substituting as above +ac_config_files="$ac_config_files Makefile libpng.pc:libpng.pc.in" + +ac_config_files="$ac_config_files libpng-config:libpng-config.in" + + +cat >confcache <<\_ACEOF +# This file is a shell script that caches the results of configure +# tests run on this system so they can be shared between configure +# scripts and configure runs, see configure's option --config-cache. +# It is not useful on other systems. If it contains results you don't +# want to keep, you may remove or edit it. +# +# config.status only pays attention to the cache file if you give it +# the --recheck option to rerun configure. +# +# `ac_cv_env_foo' variables (set or unset) will be overridden when +# loading this file, other *unset* `ac_cv_foo' will be assigned the +# following values. + +_ACEOF + +# The following way of writing the cache mishandles newlines in values, +# but we know of no workaround that is simple, portable, and efficient. +# So, we kill variables containing newlines. +# Ultrix sh set writes to stderr and can't be redirected directly, +# and sets the high bit in the cache file unless we assign to the vars. +( + for ac_var in `(set) 2>&1 | sed -n 's/^\([a-zA-Z_][a-zA-Z0-9_]*\)=.*/\1/p'`; do + eval ac_val=\$$ac_var + case $ac_val in #( + *${as_nl}*) + case $ac_var in #( + *_cv_*) { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: cache variable $ac_var contains a newline" >&5 +$as_echo "$as_me: WARNING: cache variable $ac_var contains a newline" >&2;} ;; + esac + case $ac_var in #( + _ | IFS | as_nl) ;; #( + BASH_ARGV | BASH_SOURCE) eval $ac_var= ;; #( + *) { eval $ac_var=; unset $ac_var;} ;; + esac ;; + esac + done + + (set) 2>&1 | + case $as_nl`(ac_space=' '; set) 2>&1` in #( + *${as_nl}ac_space=\ *) + # `set' does not quote correctly, so add quotes: double-quote + # substitution turns \\\\ into \\, and sed turns \\ into \. + sed -n \ + "s/'/'\\\\''/g; + s/^\\([_$as_cr_alnum]*_cv_[_$as_cr_alnum]*\\)=\\(.*\\)/\\1='\\2'/p" + ;; #( + *) + # `set' quotes correctly as required by POSIX, so do not add quotes. + sed -n "/^[_$as_cr_alnum]*_cv_[_$as_cr_alnum]*=/p" + ;; + esac | + sort +) | + sed ' + /^ac_cv_env_/b end + t clear + :clear + s/^\([^=]*\)=\(.*[{}].*\)$/test "${\1+set}" = set || &/ + t end + s/^\([^=]*\)=\(.*\)$/\1=${\1=\2}/ + :end' >>confcache +if diff "$cache_file" confcache >/dev/null 2>&1; then :; else + if test -w "$cache_file"; then + if test "x$cache_file" != "x/dev/null"; then + { $as_echo "$as_me:${as_lineno-$LINENO}: updating cache $cache_file" >&5 +$as_echo "$as_me: updating cache $cache_file" >&6;} + if test ! -f "$cache_file" || test -h "$cache_file"; then + cat confcache >"$cache_file" + else + case $cache_file in #( + */* | ?:*) + mv -f confcache "$cache_file"$$ && + mv -f "$cache_file"$$ "$cache_file" ;; #( + *) + mv -f confcache "$cache_file" ;; + esac + fi + fi + else + { $as_echo "$as_me:${as_lineno-$LINENO}: not updating unwritable cache $cache_file" >&5 +$as_echo "$as_me: not updating unwritable cache $cache_file" >&6;} + fi +fi +rm -f confcache + +test "x$prefix" = xNONE && prefix=$ac_default_prefix +# Let make expand exec_prefix. +test "x$exec_prefix" = xNONE && exec_prefix='${prefix}' + +DEFS=-DHAVE_CONFIG_H + +ac_libobjs= +ac_ltlibobjs= +U= +for ac_i in : $LIBOBJS; do test "x$ac_i" = x: && continue + # 1. Remove the extension, and $U if already installed. + ac_script='s/\$U\././;s/\.o$//;s/\.obj$//' + ac_i=`$as_echo "$ac_i" | sed "$ac_script"` + # 2. Prepend LIBOBJDIR. When used with automake>=1.10 LIBOBJDIR + # will be set to the directory where LIBOBJS objects are built. + as_fn_append ac_libobjs " \${LIBOBJDIR}$ac_i\$U.$ac_objext" + as_fn_append ac_ltlibobjs " \${LIBOBJDIR}$ac_i"'$U.lo' +done +LIBOBJS=$ac_libobjs + +LTLIBOBJS=$ac_ltlibobjs + + +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking that generated files are newer than configure" >&5 +$as_echo_n "checking that generated files are newer than configure... " >&6; } + if test -n "$am_sleep_pid"; then + # Hide warnings about reused PIDs. + wait $am_sleep_pid 2>/dev/null + fi + { $as_echo "$as_me:${as_lineno-$LINENO}: result: done" >&5 +$as_echo "done" >&6; } + if test -n "$EXEEXT"; then + am__EXEEXT_TRUE= + am__EXEEXT_FALSE='#' +else + am__EXEEXT_TRUE='#' + am__EXEEXT_FALSE= +fi + +if test -z "${MAINTAINER_MODE_TRUE}" && test -z "${MAINTAINER_MODE_FALSE}"; then + as_fn_error $? "conditional \"MAINTAINER_MODE\" was never defined. +Usually this means the macro was only invoked conditionally." "$LINENO" 5 +fi +if test -z "${AMDEP_TRUE}" && test -z "${AMDEP_FALSE}"; then + as_fn_error $? "conditional \"AMDEP\" was never defined. +Usually this means the macro was only invoked conditionally." "$LINENO" 5 +fi +if test -z "${am__fastdepCC_TRUE}" && test -z "${am__fastdepCC_FALSE}"; then + as_fn_error $? "conditional \"am__fastdepCC\" was never defined. +Usually this means the macro was only invoked conditionally." "$LINENO" 5 +fi +if test -z "${am__fastdepCCAS_TRUE}" && test -z "${am__fastdepCCAS_FALSE}"; then + as_fn_error $? "conditional \"am__fastdepCCAS\" was never defined. +Usually this means the macro was only invoked conditionally." "$LINENO" 5 +fi +if test -z "${HAVE_CLOCK_GETTIME_TRUE}" && test -z "${HAVE_CLOCK_GETTIME_FALSE}"; then + as_fn_error $? "conditional \"HAVE_CLOCK_GETTIME\" was never defined. +Usually this means the macro was only invoked conditionally." "$LINENO" 5 +fi +if test -z "${HAVE_SOLARIS_LD_TRUE}" && test -z "${HAVE_SOLARIS_LD_FALSE}"; then + as_fn_error $? "conditional \"HAVE_SOLARIS_LD\" was never defined. +Usually this means the macro was only invoked conditionally." "$LINENO" 5 +fi +if test -z "${HAVE_LD_VERSION_SCRIPT_TRUE}" && test -z "${HAVE_LD_VERSION_SCRIPT_FALSE}"; then + as_fn_error $? "conditional \"HAVE_LD_VERSION_SCRIPT\" was never defined. +Usually this means the macro was only invoked conditionally." "$LINENO" 5 +fi +if test -z "${DO_PNG_PREFIX_TRUE}" && test -z "${DO_PNG_PREFIX_FALSE}"; then + as_fn_error $? "conditional \"DO_PNG_PREFIX\" was never defined. +Usually this means the macro was only invoked conditionally." "$LINENO" 5 +fi +if test -z "${DO_INSTALL_LINKS_TRUE}" && test -z "${DO_INSTALL_LINKS_FALSE}"; then + as_fn_error $? "conditional \"DO_INSTALL_LINKS\" was never defined. +Usually this means the macro was only invoked conditionally." "$LINENO" 5 +fi +if test -z "${DO_INSTALL_LIBPNG_PC_TRUE}" && test -z "${DO_INSTALL_LIBPNG_PC_FALSE}"; then + as_fn_error $? "conditional \"DO_INSTALL_LIBPNG_PC\" was never defined. +Usually this means the macro was only invoked conditionally." "$LINENO" 5 +fi +if test -z "${DO_INSTALL_LIBPNG_CONFIG_TRUE}" && test -z "${DO_INSTALL_LIBPNG_CONFIG_FALSE}"; then + as_fn_error $? "conditional \"DO_INSTALL_LIBPNG_CONFIG\" was never defined. +Usually this means the macro was only invoked conditionally." "$LINENO" 5 +fi +if test -z "${PNG_ARM_NEON_TRUE}" && test -z "${PNG_ARM_NEON_FALSE}"; then + as_fn_error $? "conditional \"PNG_ARM_NEON\" was never defined. +Usually this means the macro was only invoked conditionally." "$LINENO" 5 +fi +if test -z "${PNG_MIPS_MSA_TRUE}" && test -z "${PNG_MIPS_MSA_FALSE}"; then + as_fn_error $? "conditional \"PNG_MIPS_MSA\" was never defined. +Usually this means the macro was only invoked conditionally." "$LINENO" 5 +fi +if test -z "${PNG_INTEL_SSE_TRUE}" && test -z "${PNG_INTEL_SSE_FALSE}"; then + as_fn_error $? "conditional \"PNG_INTEL_SSE\" was never defined. +Usually this means the macro was only invoked conditionally." "$LINENO" 5 +fi +if test -z "${PNG_POWERPC_VSX_TRUE}" && test -z "${PNG_POWERPC_VSX_FALSE}"; then + as_fn_error $? "conditional \"PNG_POWERPC_VSX\" was never defined. +Usually this means the macro was only invoked conditionally." "$LINENO" 5 +fi + +: "${CONFIG_STATUS=./config.status}" +ac_write_fail=0 +ac_clean_files_save=$ac_clean_files +ac_clean_files="$ac_clean_files $CONFIG_STATUS" +{ $as_echo "$as_me:${as_lineno-$LINENO}: creating $CONFIG_STATUS" >&5 +$as_echo "$as_me: creating $CONFIG_STATUS" >&6;} +as_write_fail=0 +cat >$CONFIG_STATUS <<_ASEOF || as_write_fail=1 +#! $SHELL +# Generated by $as_me. +# Run this file to recreate the current configuration. +# Compiler output produced by configure, useful for debugging +# configure, is in config.log if it exists. + +debug=false +ac_cs_recheck=false +ac_cs_silent=false + +SHELL=\${CONFIG_SHELL-$SHELL} +export SHELL +_ASEOF +cat >>$CONFIG_STATUS <<\_ASEOF || as_write_fail=1 +## -------------------- ## +## M4sh Initialization. ## +## -------------------- ## + +# Be more Bourne compatible +DUALCASE=1; export DUALCASE # for MKS sh +if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then : + emulate sh + NULLCMD=: + # Pre-4.2 versions of Zsh do word splitting on ${1+"$@"}, which + # is contrary to our usage. Disable this feature. + alias -g '${1+"$@"}'='"$@"' + setopt NO_GLOB_SUBST +else + case `(set -o) 2>/dev/null` in #( + *posix*) : + set -o posix ;; #( + *) : + ;; +esac +fi + + +as_nl=' +' +export as_nl +# Printing a long string crashes Solaris 7 /usr/bin/printf. +as_echo='\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\' +as_echo=$as_echo$as_echo$as_echo$as_echo$as_echo +as_echo=$as_echo$as_echo$as_echo$as_echo$as_echo$as_echo +# Prefer a ksh shell builtin over an external printf program on Solaris, +# but without wasting forks for bash or zsh. +if test -z "$BASH_VERSION$ZSH_VERSION" \ + && (test "X`print -r -- $as_echo`" = "X$as_echo") 2>/dev/null; then + as_echo='print -r --' + as_echo_n='print -rn --' +elif (test "X`printf %s $as_echo`" = "X$as_echo") 2>/dev/null; then + as_echo='printf %s\n' + as_echo_n='printf %s' +else + if test "X`(/usr/ucb/echo -n -n $as_echo) 2>/dev/null`" = "X-n $as_echo"; then + as_echo_body='eval /usr/ucb/echo -n "$1$as_nl"' + as_echo_n='/usr/ucb/echo -n' + else + as_echo_body='eval expr "X$1" : "X\\(.*\\)"' + as_echo_n_body='eval + arg=$1; + case $arg in #( + *"$as_nl"*) + expr "X$arg" : "X\\(.*\\)$as_nl"; + arg=`expr "X$arg" : ".*$as_nl\\(.*\\)"`;; + esac; + expr "X$arg" : "X\\(.*\\)" | tr -d "$as_nl" + ' + export as_echo_n_body + as_echo_n='sh -c $as_echo_n_body as_echo' + fi + export as_echo_body + as_echo='sh -c $as_echo_body as_echo' +fi + +# The user is always right. +if test "${PATH_SEPARATOR+set}" != set; then + PATH_SEPARATOR=: + (PATH='/bin;/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 && { + (PATH='/bin:/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 || + PATH_SEPARATOR=';' + } +fi + + +# IFS +# We need space, tab and new line, in precisely that order. Quoting is +# there to prevent editors from complaining about space-tab. +# (If _AS_PATH_WALK were called with IFS unset, it would disable word +# splitting by setting IFS to empty value.) +IFS=" "" $as_nl" + +# Find who we are. Look in the path if we contain no directory separator. +as_myself= +case $0 in #(( + *[\\/]* ) as_myself=$0 ;; + *) as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + test -r "$as_dir/$0" && as_myself=$as_dir/$0 && break + done +IFS=$as_save_IFS + + ;; +esac +# We did not find ourselves, most probably we were run as `sh COMMAND' +# in which case we are not to be found in the path. +if test "x$as_myself" = x; then + as_myself=$0 +fi +if test ! -f "$as_myself"; then + $as_echo "$as_myself: error: cannot find myself; rerun with an absolute file name" >&2 + exit 1 +fi + +# Unset variables that we do not need and which cause bugs (e.g. in +# pre-3.0 UWIN ksh). But do not cause bugs in bash 2.01; the "|| exit 1" +# suppresses any "Segmentation fault" message there. '((' could +# trigger a bug in pdksh 5.2.14. +for as_var in BASH_ENV ENV MAIL MAILPATH +do eval test x\${$as_var+set} = xset \ + && ( (unset $as_var) || exit 1) >/dev/null 2>&1 && unset $as_var || : +done +PS1='$ ' +PS2='> ' +PS4='+ ' + +# NLS nuisances. +LC_ALL=C +export LC_ALL +LANGUAGE=C +export LANGUAGE + +# CDPATH. +(unset CDPATH) >/dev/null 2>&1 && unset CDPATH + + +# as_fn_error STATUS ERROR [LINENO LOG_FD] +# ---------------------------------------- +# Output "`basename $0`: error: ERROR" to stderr. If LINENO and LOG_FD are +# provided, also output the error to LOG_FD, referencing LINENO. Then exit the +# script with STATUS, using 1 if that was 0. +as_fn_error () +{ + as_status=$1; test $as_status -eq 0 && as_status=1 + if test "$4"; then + as_lineno=${as_lineno-"$3"} as_lineno_stack=as_lineno_stack=$as_lineno_stack + $as_echo "$as_me:${as_lineno-$LINENO}: error: $2" >&$4 + fi + $as_echo "$as_me: error: $2" >&2 + as_fn_exit $as_status +} # as_fn_error + + +# as_fn_set_status STATUS +# ----------------------- +# Set $? to STATUS, without forking. +as_fn_set_status () +{ + return $1 +} # as_fn_set_status + +# as_fn_exit STATUS +# ----------------- +# Exit the shell with STATUS, even in a "trap 0" or "set -e" context. +as_fn_exit () +{ + set +e + as_fn_set_status $1 + exit $1 +} # as_fn_exit + +# as_fn_unset VAR +# --------------- +# Portably unset VAR. +as_fn_unset () +{ + { eval $1=; unset $1;} +} +as_unset=as_fn_unset +# as_fn_append VAR VALUE +# ---------------------- +# Append the text in VALUE to the end of the definition contained in VAR. Take +# advantage of any shell optimizations that allow amortized linear growth over +# repeated appends, instead of the typical quadratic growth present in naive +# implementations. +if (eval "as_var=1; as_var+=2; test x\$as_var = x12") 2>/dev/null; then : + eval 'as_fn_append () + { + eval $1+=\$2 + }' +else + as_fn_append () + { + eval $1=\$$1\$2 + } +fi # as_fn_append + +# as_fn_arith ARG... +# ------------------ +# Perform arithmetic evaluation on the ARGs, and store the result in the +# global $as_val. Take advantage of shells that can avoid forks. The arguments +# must be portable across $(()) and expr. +if (eval "test \$(( 1 + 1 )) = 2") 2>/dev/null; then : + eval 'as_fn_arith () + { + as_val=$(( $* )) + }' +else + as_fn_arith () + { + as_val=`expr "$@" || test $? -eq 1` + } +fi # as_fn_arith + + +if expr a : '\(a\)' >/dev/null 2>&1 && + test "X`expr 00001 : '.*\(...\)'`" = X001; then + as_expr=expr +else + as_expr=false +fi + +if (basename -- /) >/dev/null 2>&1 && test "X`basename -- / 2>&1`" = "X/"; then + as_basename=basename +else + as_basename=false +fi + +if (as_dir=`dirname -- /` && test "X$as_dir" = X/) >/dev/null 2>&1; then + as_dirname=dirname +else + as_dirname=false +fi + +as_me=`$as_basename -- "$0" || +$as_expr X/"$0" : '.*/\([^/][^/]*\)/*$' \| \ + X"$0" : 'X\(//\)$' \| \ + X"$0" : 'X\(/\)' \| . 2>/dev/null || +$as_echo X/"$0" | + sed '/^.*\/\([^/][^/]*\)\/*$/{ + s//\1/ + q + } + /^X\/\(\/\/\)$/{ + s//\1/ + q + } + /^X\/\(\/\).*/{ + s//\1/ + q + } + s/.*/./; q'` + +# Avoid depending upon Character Ranges. +as_cr_letters='abcdefghijklmnopqrstuvwxyz' +as_cr_LETTERS='ABCDEFGHIJKLMNOPQRSTUVWXYZ' +as_cr_Letters=$as_cr_letters$as_cr_LETTERS +as_cr_digits='0123456789' +as_cr_alnum=$as_cr_Letters$as_cr_digits + +ECHO_C= ECHO_N= ECHO_T= +case `echo -n x` in #((((( +-n*) + case `echo 'xy\c'` in + *c*) ECHO_T=' ';; # ECHO_T is single tab character. + xy) ECHO_C='\c';; + *) echo `echo ksh88 bug on AIX 6.1` > /dev/null + ECHO_T=' ';; + esac;; +*) + ECHO_N='-n';; +esac + +rm -f conf$$ conf$$.exe conf$$.file +if test -d conf$$.dir; then + rm -f conf$$.dir/conf$$.file +else + rm -f conf$$.dir + mkdir conf$$.dir 2>/dev/null +fi +if (echo >conf$$.file) 2>/dev/null; then + if ln -s conf$$.file conf$$ 2>/dev/null; then + as_ln_s='ln -s' + # ... but there are two gotchas: + # 1) On MSYS, both `ln -s file dir' and `ln file dir' fail. + # 2) DJGPP < 2.04 has no symlinks; `ln -s' creates a wrapper executable. + # In both cases, we have to default to `cp -pR'. + ln -s conf$$.file conf$$.dir 2>/dev/null && test ! -f conf$$.exe || + as_ln_s='cp -pR' + elif ln conf$$.file conf$$ 2>/dev/null; then + as_ln_s=ln + else + as_ln_s='cp -pR' + fi +else + as_ln_s='cp -pR' +fi +rm -f conf$$ conf$$.exe conf$$.dir/conf$$.file conf$$.file +rmdir conf$$.dir 2>/dev/null + + +# as_fn_mkdir_p +# ------------- +# Create "$as_dir" as a directory, including parents if necessary. +as_fn_mkdir_p () +{ + + case $as_dir in #( + -*) as_dir=./$as_dir;; + esac + test -d "$as_dir" || eval $as_mkdir_p || { + as_dirs= + while :; do + case $as_dir in #( + *\'*) as_qdir=`$as_echo "$as_dir" | sed "s/'/'\\\\\\\\''/g"`;; #'( + *) as_qdir=$as_dir;; + esac + as_dirs="'$as_qdir' $as_dirs" + as_dir=`$as_dirname -- "$as_dir" || +$as_expr X"$as_dir" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \ + X"$as_dir" : 'X\(//\)[^/]' \| \ + X"$as_dir" : 'X\(//\)$' \| \ + X"$as_dir" : 'X\(/\)' \| . 2>/dev/null || +$as_echo X"$as_dir" | + sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{ + s//\1/ + q + } + /^X\(\/\/\)[^/].*/{ + s//\1/ + q + } + /^X\(\/\/\)$/{ + s//\1/ + q + } + /^X\(\/\).*/{ + s//\1/ + q + } + s/.*/./; q'` + test -d "$as_dir" && break + done + test -z "$as_dirs" || eval "mkdir $as_dirs" + } || test -d "$as_dir" || as_fn_error $? "cannot create directory $as_dir" + + +} # as_fn_mkdir_p +if mkdir -p . 2>/dev/null; then + as_mkdir_p='mkdir -p "$as_dir"' +else + test -d ./-p && rmdir ./-p + as_mkdir_p=false +fi + + +# as_fn_executable_p FILE +# ----------------------- +# Test if FILE is an executable regular file. +as_fn_executable_p () +{ + test -f "$1" && test -x "$1" +} # as_fn_executable_p +as_test_x='test -x' +as_executable_p=as_fn_executable_p + +# Sed expression to map a string onto a valid CPP name. +as_tr_cpp="eval sed 'y%*$as_cr_letters%P$as_cr_LETTERS%;s%[^_$as_cr_alnum]%_%g'" + +# Sed expression to map a string onto a valid variable name. +as_tr_sh="eval sed 'y%*+%pp%;s%[^_$as_cr_alnum]%_%g'" + + +exec 6>&1 +## ----------------------------------- ## +## Main body of $CONFIG_STATUS script. ## +## ----------------------------------- ## +_ASEOF +test $as_write_fail = 0 && chmod +x $CONFIG_STATUS || ac_write_fail=1 + +cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1 +# Save the log message, to keep $0 and so on meaningful, and to +# report actual input values of CONFIG_FILES etc. instead of their +# values after options handling. +ac_log=" +This file was extended by libpng $as_me 1.6.37, which was +generated by GNU Autoconf 2.69. Invocation command line was + + CONFIG_FILES = $CONFIG_FILES + CONFIG_HEADERS = $CONFIG_HEADERS + CONFIG_LINKS = $CONFIG_LINKS + CONFIG_COMMANDS = $CONFIG_COMMANDS + $ $0 $@ + +on `(hostname || uname -n) 2>/dev/null | sed 1q` +" + +_ACEOF + +case $ac_config_files in *" +"*) set x $ac_config_files; shift; ac_config_files=$*;; +esac + +case $ac_config_headers in *" +"*) set x $ac_config_headers; shift; ac_config_headers=$*;; +esac + + +cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1 +# Files that config.status was made for. +config_files="$ac_config_files" +config_headers="$ac_config_headers" +config_commands="$ac_config_commands" + +_ACEOF + +cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1 +ac_cs_usage="\ +\`$as_me' instantiates files and other configuration actions +from templates according to the current configuration. Unless the files +and actions are specified as TAGs, all are instantiated by default. + +Usage: $0 [OPTION]... [TAG]... + + -h, --help print this help, then exit + -V, --version print version number and configuration settings, then exit + --config print configuration, then exit + -q, --quiet, --silent + do not print progress messages + -d, --debug don't remove temporary files + --recheck update $as_me by reconfiguring in the same conditions + --file=FILE[:TEMPLATE] + instantiate the configuration file FILE + --header=FILE[:TEMPLATE] + instantiate the configuration header FILE + +Configuration files: +$config_files + +Configuration headers: +$config_headers + +Configuration commands: +$config_commands + +Report bugs to ." + +_ACEOF +cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1 +ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`" +ac_cs_version="\\ +libpng config.status 1.6.37 +configured by $0, generated by GNU Autoconf 2.69, + with options \\"\$ac_cs_config\\" + +Copyright (C) 2012 Free Software Foundation, Inc. +This config.status script is free software; the Free Software Foundation +gives unlimited permission to copy, distribute and modify it." + +ac_pwd='$ac_pwd' +srcdir='$srcdir' +INSTALL='$INSTALL' +MKDIR_P='$MKDIR_P' +AWK='$AWK' +test -n "\$AWK" || AWK=awk +_ACEOF + +cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1 +# The default lists apply if the user does not specify any file. +ac_need_defaults=: +while test $# != 0 +do + case $1 in + --*=?*) + ac_option=`expr "X$1" : 'X\([^=]*\)='` + ac_optarg=`expr "X$1" : 'X[^=]*=\(.*\)'` + ac_shift=: + ;; + --*=) + ac_option=`expr "X$1" : 'X\([^=]*\)='` + ac_optarg= + ac_shift=: + ;; + *) + ac_option=$1 + ac_optarg=$2 + ac_shift=shift + ;; + esac + + case $ac_option in + # Handling of the options. + -recheck | --recheck | --rechec | --reche | --rech | --rec | --re | --r) + ac_cs_recheck=: ;; + --version | --versio | --versi | --vers | --ver | --ve | --v | -V ) + $as_echo "$ac_cs_version"; exit ;; + --config | --confi | --conf | --con | --co | --c ) + $as_echo "$ac_cs_config"; exit ;; + --debug | --debu | --deb | --de | --d | -d ) + debug=: ;; + --file | --fil | --fi | --f ) + $ac_shift + case $ac_optarg in + *\'*) ac_optarg=`$as_echo "$ac_optarg" | sed "s/'/'\\\\\\\\''/g"` ;; + '') as_fn_error $? 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"$delay_single_quote_subst"`' +want_nocaseglob='`$ECHO "$want_nocaseglob" | $SED "$delay_single_quote_subst"`' +sharedlib_from_linklib_cmd='`$ECHO "$sharedlib_from_linklib_cmd" | $SED "$delay_single_quote_subst"`' +AR='`$ECHO "$AR" | $SED "$delay_single_quote_subst"`' +AR_FLAGS='`$ECHO "$AR_FLAGS" | $SED "$delay_single_quote_subst"`' +archiver_list_spec='`$ECHO "$archiver_list_spec" | $SED "$delay_single_quote_subst"`' +STRIP='`$ECHO "$STRIP" | $SED "$delay_single_quote_subst"`' +RANLIB='`$ECHO "$RANLIB" | $SED "$delay_single_quote_subst"`' +old_postinstall_cmds='`$ECHO "$old_postinstall_cmds" | $SED "$delay_single_quote_subst"`' +old_postuninstall_cmds='`$ECHO "$old_postuninstall_cmds" | $SED "$delay_single_quote_subst"`' +old_archive_cmds='`$ECHO "$old_archive_cmds" | $SED "$delay_single_quote_subst"`' +lock_old_archive_extraction='`$ECHO "$lock_old_archive_extraction" | $SED "$delay_single_quote_subst"`' +CC='`$ECHO "$CC" | $SED "$delay_single_quote_subst"`' +CFLAGS='`$ECHO "$CFLAGS" | $SED "$delay_single_quote_subst"`' +compiler='`$ECHO "$compiler" | $SED "$delay_single_quote_subst"`' +GCC='`$ECHO "$GCC" | $SED "$delay_single_quote_subst"`' +lt_cv_sys_global_symbol_pipe='`$ECHO "$lt_cv_sys_global_symbol_pipe" | $SED "$delay_single_quote_subst"`' +lt_cv_sys_global_symbol_to_cdecl='`$ECHO "$lt_cv_sys_global_symbol_to_cdecl" | $SED "$delay_single_quote_subst"`' +lt_cv_sys_global_symbol_to_import='`$ECHO "$lt_cv_sys_global_symbol_to_import" | $SED "$delay_single_quote_subst"`' +lt_cv_sys_global_symbol_to_c_name_address='`$ECHO "$lt_cv_sys_global_symbol_to_c_name_address" | $SED "$delay_single_quote_subst"`' +lt_cv_sys_global_symbol_to_c_name_address_lib_prefix='`$ECHO "$lt_cv_sys_global_symbol_to_c_name_address_lib_prefix" | $SED "$delay_single_quote_subst"`' +lt_cv_nm_interface='`$ECHO "$lt_cv_nm_interface" | $SED "$delay_single_quote_subst"`' +nm_file_list_spec='`$ECHO "$nm_file_list_spec" | $SED "$delay_single_quote_subst"`' +lt_sysroot='`$ECHO "$lt_sysroot" | $SED "$delay_single_quote_subst"`' +lt_cv_truncate_bin='`$ECHO "$lt_cv_truncate_bin" | $SED "$delay_single_quote_subst"`' +objdir='`$ECHO "$objdir" | $SED "$delay_single_quote_subst"`' +MAGIC_CMD='`$ECHO "$MAGIC_CMD" | $SED "$delay_single_quote_subst"`' +lt_prog_compiler_no_builtin_flag='`$ECHO "$lt_prog_compiler_no_builtin_flag" | $SED "$delay_single_quote_subst"`' +lt_prog_compiler_pic='`$ECHO "$lt_prog_compiler_pic" | $SED "$delay_single_quote_subst"`' +lt_prog_compiler_wl='`$ECHO "$lt_prog_compiler_wl" | $SED "$delay_single_quote_subst"`' +lt_prog_compiler_static='`$ECHO "$lt_prog_compiler_static" | $SED "$delay_single_quote_subst"`' +lt_cv_prog_compiler_c_o='`$ECHO "$lt_cv_prog_compiler_c_o" | $SED "$delay_single_quote_subst"`' +need_locks='`$ECHO "$need_locks" | $SED "$delay_single_quote_subst"`' +MANIFEST_TOOL='`$ECHO "$MANIFEST_TOOL" | $SED "$delay_single_quote_subst"`' +DSYMUTIL='`$ECHO "$DSYMUTIL" | $SED "$delay_single_quote_subst"`' +NMEDIT='`$ECHO "$NMEDIT" | $SED "$delay_single_quote_subst"`' +LIPO='`$ECHO "$LIPO" | $SED "$delay_single_quote_subst"`' +OTOOL='`$ECHO "$OTOOL" | $SED "$delay_single_quote_subst"`' +OTOOL64='`$ECHO "$OTOOL64" | $SED "$delay_single_quote_subst"`' +libext='`$ECHO "$libext" | $SED "$delay_single_quote_subst"`' +shrext_cmds='`$ECHO "$shrext_cmds" | $SED "$delay_single_quote_subst"`' +extract_expsyms_cmds='`$ECHO "$extract_expsyms_cmds" | $SED "$delay_single_quote_subst"`' +archive_cmds_need_lc='`$ECHO "$archive_cmds_need_lc" | $SED "$delay_single_quote_subst"`' +enable_shared_with_static_runtimes='`$ECHO "$enable_shared_with_static_runtimes" | $SED "$delay_single_quote_subst"`' +export_dynamic_flag_spec='`$ECHO "$export_dynamic_flag_spec" | $SED "$delay_single_quote_subst"`' +whole_archive_flag_spec='`$ECHO "$whole_archive_flag_spec" | $SED "$delay_single_quote_subst"`' +compiler_needs_object='`$ECHO "$compiler_needs_object" | $SED "$delay_single_quote_subst"`' +old_archive_from_new_cmds='`$ECHO "$old_archive_from_new_cmds" | $SED "$delay_single_quote_subst"`' +old_archive_from_expsyms_cmds='`$ECHO "$old_archive_from_expsyms_cmds" | $SED "$delay_single_quote_subst"`' +archive_cmds='`$ECHO "$archive_cmds" | $SED "$delay_single_quote_subst"`' +archive_expsym_cmds='`$ECHO "$archive_expsym_cmds" | $SED "$delay_single_quote_subst"`' +module_cmds='`$ECHO "$module_cmds" | $SED "$delay_single_quote_subst"`' +module_expsym_cmds='`$ECHO "$module_expsym_cmds" | $SED "$delay_single_quote_subst"`' +with_gnu_ld='`$ECHO "$with_gnu_ld" | $SED "$delay_single_quote_subst"`' +allow_undefined_flag='`$ECHO "$allow_undefined_flag" | $SED "$delay_single_quote_subst"`' +no_undefined_flag='`$ECHO "$no_undefined_flag" | $SED "$delay_single_quote_subst"`' +hardcode_libdir_flag_spec='`$ECHO "$hardcode_libdir_flag_spec" | $SED "$delay_single_quote_subst"`' +hardcode_libdir_separator='`$ECHO "$hardcode_libdir_separator" | $SED "$delay_single_quote_subst"`' +hardcode_direct='`$ECHO "$hardcode_direct" | $SED "$delay_single_quote_subst"`' +hardcode_direct_absolute='`$ECHO "$hardcode_direct_absolute" | $SED "$delay_single_quote_subst"`' +hardcode_minus_L='`$ECHO "$hardcode_minus_L" | $SED "$delay_single_quote_subst"`' +hardcode_shlibpath_var='`$ECHO "$hardcode_shlibpath_var" | $SED "$delay_single_quote_subst"`' +hardcode_automatic='`$ECHO "$hardcode_automatic" | $SED "$delay_single_quote_subst"`' +inherit_rpath='`$ECHO "$inherit_rpath" | $SED "$delay_single_quote_subst"`' +link_all_deplibs='`$ECHO "$link_all_deplibs" | $SED "$delay_single_quote_subst"`' +always_export_symbols='`$ECHO "$always_export_symbols" | $SED "$delay_single_quote_subst"`' +export_symbols_cmds='`$ECHO "$export_symbols_cmds" | $SED "$delay_single_quote_subst"`' +exclude_expsyms='`$ECHO "$exclude_expsyms" | $SED "$delay_single_quote_subst"`' +include_expsyms='`$ECHO "$include_expsyms" | $SED "$delay_single_quote_subst"`' +prelink_cmds='`$ECHO "$prelink_cmds" | $SED "$delay_single_quote_subst"`' +postlink_cmds='`$ECHO "$postlink_cmds" | $SED "$delay_single_quote_subst"`' +file_list_spec='`$ECHO "$file_list_spec" | $SED "$delay_single_quote_subst"`' +variables_saved_for_relink='`$ECHO "$variables_saved_for_relink" | $SED "$delay_single_quote_subst"`' +need_lib_prefix='`$ECHO "$need_lib_prefix" | $SED "$delay_single_quote_subst"`' +need_version='`$ECHO "$need_version" | $SED "$delay_single_quote_subst"`' +version_type='`$ECHO "$version_type" | $SED "$delay_single_quote_subst"`' +runpath_var='`$ECHO "$runpath_var" | $SED "$delay_single_quote_subst"`' +shlibpath_var='`$ECHO "$shlibpath_var" | $SED "$delay_single_quote_subst"`' +shlibpath_overrides_runpath='`$ECHO "$shlibpath_overrides_runpath" | $SED "$delay_single_quote_subst"`' +libname_spec='`$ECHO "$libname_spec" | $SED "$delay_single_quote_subst"`' +library_names_spec='`$ECHO "$library_names_spec" | $SED "$delay_single_quote_subst"`' +soname_spec='`$ECHO "$soname_spec" | $SED "$delay_single_quote_subst"`' +install_override_mode='`$ECHO "$install_override_mode" | $SED "$delay_single_quote_subst"`' +postinstall_cmds='`$ECHO "$postinstall_cmds" | $SED "$delay_single_quote_subst"`' +postuninstall_cmds='`$ECHO "$postuninstall_cmds" | $SED "$delay_single_quote_subst"`' +finish_cmds='`$ECHO "$finish_cmds" | $SED "$delay_single_quote_subst"`' +finish_eval='`$ECHO "$finish_eval" | $SED "$delay_single_quote_subst"`' +hardcode_into_libs='`$ECHO "$hardcode_into_libs" | $SED "$delay_single_quote_subst"`' +sys_lib_search_path_spec='`$ECHO "$sys_lib_search_path_spec" | $SED "$delay_single_quote_subst"`' +configure_time_dlsearch_path='`$ECHO "$configure_time_dlsearch_path" | $SED "$delay_single_quote_subst"`' +configure_time_lt_sys_library_path='`$ECHO "$configure_time_lt_sys_library_path" | $SED "$delay_single_quote_subst"`' +hardcode_action='`$ECHO "$hardcode_action" | $SED "$delay_single_quote_subst"`' +enable_dlopen='`$ECHO "$enable_dlopen" | $SED "$delay_single_quote_subst"`' +enable_dlopen_self='`$ECHO "$enable_dlopen_self" | $SED "$delay_single_quote_subst"`' +enable_dlopen_self_static='`$ECHO "$enable_dlopen_self_static" | $SED "$delay_single_quote_subst"`' +old_striplib='`$ECHO "$old_striplib" | $SED "$delay_single_quote_subst"`' +striplib='`$ECHO "$striplib" | $SED "$delay_single_quote_subst"`' + +LTCC='$LTCC' +LTCFLAGS='$LTCFLAGS' +compiler='$compiler_DEFAULT' + +# A function that is used when there is no print builtin or printf. +func_fallback_echo () +{ + eval 'cat <<_LTECHO_EOF +\$1 +_LTECHO_EOF' +} + +# Quote evaled strings. +for var in SED \ +GREP \ +EGREP \ +FGREP \ +SHELL \ +ECHO \ +LD \ +AS \ +DLLTOOL \ +OBJDUMP \ +PATH_SEPARATOR \ +NM \ +LN_S \ +lt_SP2NL \ +lt_NL2SP \ +reload_flag \ +deplibs_check_method \ +file_magic_cmd \ +file_magic_glob \ +want_nocaseglob \ +sharedlib_from_linklib_cmd \ +AR \ +AR_FLAGS \ +archiver_list_spec \ +STRIP \ +RANLIB \ +CC \ +CFLAGS \ +compiler \ +lt_cv_sys_global_symbol_pipe \ +lt_cv_sys_global_symbol_to_cdecl \ +lt_cv_sys_global_symbol_to_import \ +lt_cv_sys_global_symbol_to_c_name_address \ +lt_cv_sys_global_symbol_to_c_name_address_lib_prefix \ +lt_cv_nm_interface \ +nm_file_list_spec \ +lt_cv_truncate_bin \ +lt_prog_compiler_no_builtin_flag \ +lt_prog_compiler_pic \ +lt_prog_compiler_wl \ +lt_prog_compiler_static \ +lt_cv_prog_compiler_c_o \ +need_locks \ +MANIFEST_TOOL \ +DSYMUTIL \ +NMEDIT \ +LIPO \ +OTOOL \ +OTOOL64 \ +shrext_cmds \ +export_dynamic_flag_spec \ +whole_archive_flag_spec \ +compiler_needs_object \ +with_gnu_ld \ +allow_undefined_flag \ +no_undefined_flag \ +hardcode_libdir_flag_spec \ +hardcode_libdir_separator \ +exclude_expsyms \ +include_expsyms \ +file_list_spec \ +variables_saved_for_relink \ +libname_spec \ +library_names_spec \ +soname_spec \ +install_override_mode \ +finish_eval \ +old_striplib \ +striplib; do + case \`eval \\\\\$ECHO \\\\""\\\\\$\$var"\\\\"\` in + *[\\\\\\\`\\"\\\$]*) + eval "lt_\$var=\\\\\\"\\\`\\\$ECHO \\"\\\$\$var\\" | \\\$SED \\"\\\$sed_quote_subst\\"\\\`\\\\\\"" ## exclude from sc_prohibit_nested_quotes + ;; + *) + eval "lt_\$var=\\\\\\"\\\$\$var\\\\\\"" + ;; + esac +done + +# Double-quote double-evaled strings. +for var in reload_cmds \ +old_postinstall_cmds \ +old_postuninstall_cmds \ +old_archive_cmds \ +extract_expsyms_cmds \ +old_archive_from_new_cmds \ +old_archive_from_expsyms_cmds \ +archive_cmds \ +archive_expsym_cmds \ +module_cmds \ +module_expsym_cmds \ +export_symbols_cmds \ +prelink_cmds \ +postlink_cmds \ +postinstall_cmds \ +postuninstall_cmds \ +finish_cmds \ +sys_lib_search_path_spec \ +configure_time_dlsearch_path \ +configure_time_lt_sys_library_path; do + case \`eval \\\\\$ECHO \\\\""\\\\\$\$var"\\\\"\` in + *[\\\\\\\`\\"\\\$]*) + eval "lt_\$var=\\\\\\"\\\`\\\$ECHO \\"\\\$\$var\\" | \\\$SED -e \\"\\\$double_quote_subst\\" -e \\"\\\$sed_quote_subst\\" -e \\"\\\$delay_variable_subst\\"\\\`\\\\\\"" ## exclude from sc_prohibit_nested_quotes + ;; + *) + eval "lt_\$var=\\\\\\"\\\$\$var\\\\\\"" + ;; + esac +done + +ac_aux_dir='$ac_aux_dir' + +# See if we are running on zsh, and set the options that allow our +# commands through without removal of \ escapes INIT. +if test -n "\${ZSH_VERSION+set}"; then + setopt NO_GLOB_SUBST +fi + + + PACKAGE='$PACKAGE' + VERSION='$VERSION' + RM='$RM' + ofile='$ofile' + + + + +_ACEOF + +cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1 + +# Handling of arguments. +for ac_config_target in $ac_config_targets +do + case $ac_config_target in + "config.h") CONFIG_HEADERS="$CONFIG_HEADERS config.h" ;; + "depfiles") CONFIG_COMMANDS="$CONFIG_COMMANDS depfiles" ;; + "libtool") CONFIG_COMMANDS="$CONFIG_COMMANDS libtool" ;; + "Makefile") CONFIG_FILES="$CONFIG_FILES Makefile" ;; + "libpng.pc") CONFIG_FILES="$CONFIG_FILES libpng.pc:libpng.pc.in" ;; + "libpng-config") CONFIG_FILES="$CONFIG_FILES libpng-config:libpng-config.in" ;; + + *) as_fn_error $? "invalid argument: \`$ac_config_target'" "$LINENO" 5;; + esac +done + + +# If the user did not use the arguments to specify the items to instantiate, +# then the envvar interface is used. Set only those that are not. +# We use the long form for the default assignment because of an extremely +# bizarre bug on SunOS 4.1.3. +if $ac_need_defaults; then + test "${CONFIG_FILES+set}" = set || CONFIG_FILES=$config_files + test "${CONFIG_HEADERS+set}" = set || CONFIG_HEADERS=$config_headers + test "${CONFIG_COMMANDS+set}" = set || CONFIG_COMMANDS=$config_commands +fi + +# Have a temporary directory for convenience. Make it in the build tree +# simply because there is no reason against having it here, and in addition, +# creating and moving files from /tmp can sometimes cause problems. +# Hook for its removal unless debugging. +# Note that there is a small window in which the directory will not be cleaned: +# after its creation but before its name has been assigned to `$tmp'. +$debug || +{ + tmp= ac_tmp= + trap 'exit_status=$? + : "${ac_tmp:=$tmp}" + { test ! -d "$ac_tmp" || rm -fr "$ac_tmp"; } && exit $exit_status +' 0 + trap 'as_fn_exit 1' 1 2 13 15 +} +# Create a (secure) tmp directory for tmp files. + +{ + tmp=`(umask 077 && mktemp -d "./confXXXXXX") 2>/dev/null` && + test -d "$tmp" +} || +{ + tmp=./conf$$-$RANDOM + (umask 077 && mkdir "$tmp") +} || as_fn_error $? "cannot create a temporary directory in ." "$LINENO" 5 +ac_tmp=$tmp + +# Set up the scripts for CONFIG_FILES section. +# No need to generate them if there are no CONFIG_FILES. +# This happens for instance with `./config.status config.h'. +if test -n "$CONFIG_FILES"; then + + +ac_cr=`echo X | tr X '\015'` +# On cygwin, bash can eat \r inside `` if the user requested igncr. +# But we know of no other shell where ac_cr would be empty at this +# point, so we can use a bashism as a fallback. +if test "x$ac_cr" = x; then + eval ac_cr=\$\'\\r\' +fi +ac_cs_awk_cr=`$AWK 'BEGIN { print "a\rb" }' /dev/null` +if test "$ac_cs_awk_cr" = "a${ac_cr}b"; then + ac_cs_awk_cr='\\r' +else + ac_cs_awk_cr=$ac_cr +fi + +echo 'BEGIN {' >"$ac_tmp/subs1.awk" && +_ACEOF + + +{ + echo "cat >conf$$subs.awk <<_ACEOF" && + echo "$ac_subst_vars" | sed 's/.*/&!$&$ac_delim/' && + echo "_ACEOF" +} >conf$$subs.sh || + as_fn_error $? "could not make $CONFIG_STATUS" "$LINENO" 5 +ac_delim_num=`echo "$ac_subst_vars" | grep -c '^'` +ac_delim='%!_!# ' +for ac_last_try in false false false false false :; do + . ./conf$$subs.sh || + as_fn_error $? "could not make $CONFIG_STATUS" "$LINENO" 5 + + ac_delim_n=`sed -n "s/.*$ac_delim\$/X/p" conf$$subs.awk | grep -c X` + if test $ac_delim_n = $ac_delim_num; then + break + elif $ac_last_try; then + as_fn_error $? "could not make $CONFIG_STATUS" "$LINENO" 5 + else + ac_delim="$ac_delim!$ac_delim _$ac_delim!! " + fi +done +rm -f conf$$subs.sh + +cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1 +cat >>"\$ac_tmp/subs1.awk" <<\\_ACAWK && +_ACEOF +sed -n ' +h +s/^/S["/; s/!.*/"]=/ +p +g +s/^[^!]*!// +:repl +t repl +s/'"$ac_delim"'$// +t delim +:nl +h +s/\(.\{148\}\)..*/\1/ +t more1 +s/["\\]/\\&/g; s/^/"/; s/$/\\n"\\/ +p +n +b repl +:more1 +s/["\\]/\\&/g; s/^/"/; s/$/"\\/ +p +g +s/.\{148\}// +t nl +:delim +h +s/\(.\{148\}\)..*/\1/ +t more2 +s/["\\]/\\&/g; s/^/"/; s/$/"/ +p +b +:more2 +s/["\\]/\\&/g; s/^/"/; s/$/"\\/ +p +g +s/.\{148\}// +t delim +' >$CONFIG_STATUS || ac_write_fail=1 +rm -f conf$$subs.awk +cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1 +_ACAWK +cat >>"\$ac_tmp/subs1.awk" <<_ACAWK && + for (key in S) S_is_set[key] = 1 + FS = "" + +} +{ + line = $ 0 + nfields = split(line, field, "@") + substed = 0 + len = length(field[1]) + for (i = 2; i < nfields; i++) { + key = field[i] + keylen = length(key) + if (S_is_set[key]) { + value = S[key] + line = substr(line, 1, len) "" value "" substr(line, len + keylen + 3) + len += length(value) + length(field[++i]) + substed = 1 + } else + len += 1 + keylen + } + + print line +} + +_ACAWK +_ACEOF +cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1 +if sed "s/$ac_cr//" < /dev/null > /dev/null 2>&1; then + sed "s/$ac_cr\$//; s/$ac_cr/$ac_cs_awk_cr/g" +else + cat +fi < "$ac_tmp/subs1.awk" > "$ac_tmp/subs.awk" \ + || as_fn_error $? "could not setup config files machinery" "$LINENO" 5 +_ACEOF + +# VPATH may cause trouble with some makes, so we remove sole $(srcdir), +# ${srcdir} and @srcdir@ entries from VPATH if srcdir is ".", strip leading and +# trailing colons and then remove the whole line if VPATH becomes empty +# (actually we leave an empty line to preserve line numbers). +if test "x$srcdir" = x.; then + ac_vpsub='/^[ ]*VPATH[ ]*=[ ]*/{ +h +s/// +s/^/:/ +s/[ ]*$/:/ +s/:\$(srcdir):/:/g +s/:\${srcdir}:/:/g +s/:@srcdir@:/:/g +s/^:*// +s/:*$// +x +s/\(=[ ]*\).*/\1/ +G +s/\n// +s/^[^=]*=[ ]*$// +}' +fi + +cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1 +fi # test -n "$CONFIG_FILES" + +# Set up the scripts for CONFIG_HEADERS section. +# No need to generate them if there are no CONFIG_HEADERS. +# This happens for instance with `./config.status Makefile'. +if test -n "$CONFIG_HEADERS"; then +cat >"$ac_tmp/defines.awk" <<\_ACAWK || +BEGIN { +_ACEOF + +# Transform confdefs.h into an awk script `defines.awk', embedded as +# here-document in config.status, that substitutes the proper values into +# config.h.in to produce config.h. + +# Create a delimiter string that does not exist in confdefs.h, to ease +# handling of long lines. +ac_delim='%!_!# ' +for ac_last_try in false false :; do + ac_tt=`sed -n "/$ac_delim/p" confdefs.h` + if test -z "$ac_tt"; then + break + elif $ac_last_try; then + as_fn_error $? "could not make $CONFIG_HEADERS" "$LINENO" 5 + else + ac_delim="$ac_delim!$ac_delim _$ac_delim!! " + fi +done + +# For the awk script, D is an array of macro values keyed by name, +# likewise P contains macro parameters if any. Preserve backslash +# newline sequences. + +ac_word_re=[_$as_cr_Letters][_$as_cr_alnum]* +sed -n ' +s/.\{148\}/&'"$ac_delim"'/g +t rset +:rset +s/^[ ]*#[ ]*define[ ][ ]*/ / +t def +d +:def +s/\\$// +t bsnl +s/["\\]/\\&/g +s/^ \('"$ac_word_re"'\)\(([^()]*)\)[ ]*\(.*\)/P["\1"]="\2"\ +D["\1"]=" \3"/p +s/^ \('"$ac_word_re"'\)[ ]*\(.*\)/D["\1"]=" \2"/p +d +:bsnl +s/["\\]/\\&/g +s/^ \('"$ac_word_re"'\)\(([^()]*)\)[ ]*\(.*\)/P["\1"]="\2"\ +D["\1"]=" \3\\\\\\n"\\/p +t cont +s/^ \('"$ac_word_re"'\)[ ]*\(.*\)/D["\1"]=" \2\\\\\\n"\\/p +t cont +d +:cont +n +s/.\{148\}/&'"$ac_delim"'/g +t clear +:clear +s/\\$// +t bsnlc +s/["\\]/\\&/g; s/^/"/; s/$/"/p +d +:bsnlc +s/["\\]/\\&/g; s/^/"/; s/$/\\\\\\n"\\/p +b cont +' >$CONFIG_STATUS || ac_write_fail=1 + +cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1 + for (key in D) D_is_set[key] = 1 + FS = "" +} +/^[\t ]*#[\t ]*(define|undef)[\t ]+$ac_word_re([\t (]|\$)/ { + line = \$ 0 + split(line, arg, " ") + if (arg[1] == "#") { + defundef = arg[2] + mac1 = arg[3] + } else { + defundef = substr(arg[1], 2) + mac1 = arg[2] + } + split(mac1, mac2, "(") #) + macro = mac2[1] + prefix = substr(line, 1, index(line, defundef) - 1) + if (D_is_set[macro]) { + # Preserve the white space surrounding the "#". + print prefix "define", macro P[macro] D[macro] + next + } else { + # Replace #undef with comments. This is necessary, for example, + # in the case of _POSIX_SOURCE, which is predefined and required + # on some systems where configure will not decide to define it. + if (defundef == "undef") { + print "/*", prefix defundef, macro, "*/" + next + } + } +} +{ print } +_ACAWK +_ACEOF +cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1 + as_fn_error $? "could not setup config headers machinery" "$LINENO" 5 +fi # test -n "$CONFIG_HEADERS" + + +eval set X " :F $CONFIG_FILES :H $CONFIG_HEADERS :C $CONFIG_COMMANDS" +shift +for ac_tag +do + case $ac_tag in + :[FHLC]) ac_mode=$ac_tag; continue;; + esac + case $ac_mode$ac_tag in + :[FHL]*:*);; + :L* | :C*:*) as_fn_error $? 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First name is the real one, the rest are links. +# The last name is the one that the linker finds with -lNAME +library_names_spec=$lt_library_names_spec + +# The coded name of the library, if different from the real name. +soname_spec=$lt_soname_spec + +# Permission mode override for installation of shared libraries. +install_override_mode=$lt_install_override_mode + +# Command to use after installation of a shared archive. +postinstall_cmds=$lt_postinstall_cmds + +# Command to use after uninstallation of a shared archive. +postuninstall_cmds=$lt_postuninstall_cmds + +# Commands used to finish a libtool library installation in a directory. +finish_cmds=$lt_finish_cmds + +# As "finish_cmds", except a single script fragment to be evaled but +# not shown. +finish_eval=$lt_finish_eval + +# Whether we should hardcode library paths into libraries. +hardcode_into_libs=$hardcode_into_libs + +# Compile-time system search path for libraries. +sys_lib_search_path_spec=$lt_sys_lib_search_path_spec + +# Detected run-time system search path for libraries. +sys_lib_dlsearch_path_spec=$lt_configure_time_dlsearch_path + +# Explicit LT_SYS_LIBRARY_PATH set during ./configure time. +configure_time_lt_sys_library_path=$lt_configure_time_lt_sys_library_path + +# Whether dlopen is supported. +dlopen_support=$enable_dlopen + +# Whether dlopen of programs is supported. +dlopen_self=$enable_dlopen_self + +# Whether dlopen of statically linked programs is supported. +dlopen_self_static=$enable_dlopen_self_static + +# Commands to strip libraries. +old_striplib=$lt_old_striplib +striplib=$lt_striplib + + +# The linker used to build libraries. +LD=$lt_LD + +# How to create reloadable object files. +reload_flag=$lt_reload_flag +reload_cmds=$lt_reload_cmds + +# Commands used to build an old-style archive. +old_archive_cmds=$lt_old_archive_cmds + +# A language specific compiler. +CC=$lt_compiler + +# Is the compiler the GNU compiler? +with_gcc=$GCC + +# Compiler flag to turn off builtin functions. +no_builtin_flag=$lt_lt_prog_compiler_no_builtin_flag + +# Additional compiler flags for building library objects. +pic_flag=$lt_lt_prog_compiler_pic + +# How to pass a linker flag through the compiler. +wl=$lt_lt_prog_compiler_wl + +# Compiler flag to prevent dynamic linking. +link_static_flag=$lt_lt_prog_compiler_static + +# Does compiler simultaneously support -c and -o options? +compiler_c_o=$lt_lt_cv_prog_compiler_c_o + +# Whether or not to add -lc for building shared libraries. +build_libtool_need_lc=$archive_cmds_need_lc + +# Whether or not to disallow shared libs when runtime libs are static. +allow_libtool_libs_with_static_runtimes=$enable_shared_with_static_runtimes + +# Compiler flag to allow reflexive dlopens. +export_dynamic_flag_spec=$lt_export_dynamic_flag_spec + +# Compiler flag to generate shared objects directly from archives. +whole_archive_flag_spec=$lt_whole_archive_flag_spec + +# Whether the compiler copes with passing no objects directly. +compiler_needs_object=$lt_compiler_needs_object + +# Create an old-style archive from a shared archive. +old_archive_from_new_cmds=$lt_old_archive_from_new_cmds + +# Create a temporary old-style archive to link instead of a shared archive. +old_archive_from_expsyms_cmds=$lt_old_archive_from_expsyms_cmds + +# Commands used to build a shared archive. +archive_cmds=$lt_archive_cmds +archive_expsym_cmds=$lt_archive_expsym_cmds + +# Commands used to build a loadable module if different from building +# a shared archive. +module_cmds=$lt_module_cmds +module_expsym_cmds=$lt_module_expsym_cmds + +# Whether we are building with GNU ld or not. +with_gnu_ld=$lt_with_gnu_ld + +# Flag that allows shared libraries with undefined symbols to be built. +allow_undefined_flag=$lt_allow_undefined_flag + +# Flag that enforces no undefined symbols. +no_undefined_flag=$lt_no_undefined_flag + +# Flag to hardcode \$libdir into a binary during linking. +# This must work even if \$libdir does not exist +hardcode_libdir_flag_spec=$lt_hardcode_libdir_flag_spec + +# Whether we need a single "-rpath" flag with a separated argument. +hardcode_libdir_separator=$lt_hardcode_libdir_separator + +# Set to "yes" if using DIR/libNAME\$shared_ext during linking hardcodes +# DIR into the resulting binary. +hardcode_direct=$hardcode_direct + +# Set to "yes" if using DIR/libNAME\$shared_ext during linking hardcodes +# DIR into the resulting binary and the resulting library dependency is +# "absolute",i.e impossible to change by setting \$shlibpath_var if the +# library is relocated. +hardcode_direct_absolute=$hardcode_direct_absolute + +# Set to "yes" if using the -LDIR flag during linking hardcodes DIR +# into the resulting binary. +hardcode_minus_L=$hardcode_minus_L + +# Set to "yes" if using SHLIBPATH_VAR=DIR during linking hardcodes DIR +# into the resulting binary. +hardcode_shlibpath_var=$hardcode_shlibpath_var + +# Set to "yes" if building a shared library automatically hardcodes DIR +# into the library and all subsequent libraries and executables linked +# against it. +hardcode_automatic=$hardcode_automatic + +# Set to yes if linker adds runtime paths of dependent libraries +# to runtime path list. +inherit_rpath=$inherit_rpath + +# Whether libtool must link a program against all its dependency libraries. +link_all_deplibs=$link_all_deplibs + +# Set to "yes" if exported symbols are required. +always_export_symbols=$always_export_symbols + +# The commands to list exported symbols. +export_symbols_cmds=$lt_export_symbols_cmds + +# Symbols that should not be listed in the preloaded symbols. +exclude_expsyms=$lt_exclude_expsyms + +# Symbols that must always be exported. +include_expsyms=$lt_include_expsyms + +# Commands necessary for linking programs (against libraries) with templates. +prelink_cmds=$lt_prelink_cmds + +# Commands necessary for finishing linking programs. +postlink_cmds=$lt_postlink_cmds + +# Specify filename containing input files. +file_list_spec=$lt_file_list_spec + +# How to hardcode a shared library path into an executable. +hardcode_action=$hardcode_action + +# ### END LIBTOOL CONFIG + +_LT_EOF + + cat <<'_LT_EOF' >> "$cfgfile" + +# ### BEGIN FUNCTIONS SHARED WITH CONFIGURE + +# func_munge_path_list VARIABLE PATH +# ----------------------------------- +# VARIABLE is name of variable containing _space_ separated list of +# directories to be munged by the contents of PATH, which is string +# having a format: +# "DIR[:DIR]:" +# string "DIR[ DIR]" will be prepended to VARIABLE +# ":DIR[:DIR]" +# string "DIR[ DIR]" will be appended to VARIABLE +# "DIRP[:DIRP]::[DIRA:]DIRA" +# string "DIRP[ DIRP]" will be prepended to VARIABLE and string +# "DIRA[ DIRA]" will be appended to VARIABLE +# "DIR[:DIR]" +# VARIABLE will be replaced by "DIR[ DIR]" +func_munge_path_list () +{ + case x$2 in + x) + ;; + *:) + eval $1=\"`$ECHO $2 | $SED 's/:/ /g'` \$$1\" + ;; + x:*) + eval $1=\"\$$1 `$ECHO $2 | $SED 's/:/ /g'`\" + ;; + *::*) + eval $1=\"\$$1\ `$ECHO $2 | $SED -e 's/.*:://' -e 's/:/ /g'`\" + eval $1=\"`$ECHO $2 | $SED -e 's/::.*//' -e 's/:/ /g'`\ \$$1\" + ;; + *) + eval $1=\"`$ECHO $2 | $SED 's/:/ /g'`\" + ;; + esac +} + + +# Calculate cc_basename. Skip known compiler wrappers and cross-prefix. +func_cc_basename () +{ + for cc_temp in $*""; do + case $cc_temp in + compile | *[\\/]compile | ccache | *[\\/]ccache ) ;; + distcc | *[\\/]distcc | purify | *[\\/]purify ) ;; + \-*) ;; + *) break;; + esac + done + func_cc_basename_result=`$ECHO "$cc_temp" | $SED "s%.*/%%; s%^$host_alias-%%"` +} + + +# ### END FUNCTIONS SHARED WITH CONFIGURE + +_LT_EOF + + case $host_os in + aix3*) + cat <<\_LT_EOF >> "$cfgfile" +# AIX sometimes has problems with the GCC collect2 program. For some +# reason, if we set the COLLECT_NAMES environment variable, the problems +# vanish in a puff of smoke. +if test set != "${COLLECT_NAMES+set}"; then + COLLECT_NAMES= + export COLLECT_NAMES +fi +_LT_EOF + ;; + esac + + +ltmain=$ac_aux_dir/ltmain.sh + + + # We use sed instead of cat because bash on DJGPP gets confused if + # if finds mixed CR/LF and LF-only lines. Since sed operates in + # text mode, it properly converts lines to CR/LF. This bash problem + # is reportedly fixed, but why not run on old versions too? + sed '$q' "$ltmain" >> "$cfgfile" \ + || (rm -f "$cfgfile"; exit 1) + + mv -f "$cfgfile" "$ofile" || + (rm -f "$ofile" && cp "$cfgfile" "$ofile" && rm -f "$cfgfile") + chmod +x "$ofile" + + ;; + "libpng-config":F) chmod +x libpng-config ;; + + esac +done # for ac_tag + + +as_fn_exit 0 +_ACEOF +ac_clean_files=$ac_clean_files_save + +test $ac_write_fail = 0 || + as_fn_error $? "write failure creating $CONFIG_STATUS" "$LINENO" 5 + + +# configure is writing to config.log, and then calls config.status. +# config.status does its own redirection, appending to config.log. +# Unfortunately, on DOS this fails, as config.log is still kept open +# by configure, so config.status won't be able to write to it; its +# output is simply discarded. So we exec the FD to /dev/null, +# effectively closing config.log, so it can be properly (re)opened and +# appended to by config.status. When coming back to configure, we +# need to make the FD available again. +if test "$no_create" != yes; then + ac_cs_success=: + ac_config_status_args= + test "$silent" = yes && + ac_config_status_args="$ac_config_status_args --quiet" + exec 5>/dev/null + $SHELL $CONFIG_STATUS $ac_config_status_args || ac_cs_success=false + exec 5>>config.log + # Use ||, not &&, to avoid exiting from the if with $? = 1, which + # would make configure fail if this is the last instruction. + $ac_cs_success || as_fn_exit 1 +fi +if test -n "$ac_unrecognized_opts" && test "$enable_option_checking" != no; then + { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: unrecognized options: $ac_unrecognized_opts" >&5 +$as_echo "$as_me: WARNING: unrecognized options: $ac_unrecognized_opts" >&2;} +fi + diff --git a/extern/libpng/configure.ac b/extern/libpng/configure.ac new file mode 100644 index 0000000000..52dba94b4b --- /dev/null +++ b/extern/libpng/configure.ac @@ -0,0 +1,532 @@ +# configure.ac + +# Copyright (c) 2018 Cosmin Truta +# Copyright (c) 2004-2016 Glenn Randers-Pehrson + +# This code is released under the libpng license. +# For conditions of distribution and use, see the disclaimer +# and license in png.h + +dnl Process this file with autoconf to produce a configure script. +dnl +dnl Minor upgrades (compatible ABI): increment the package version +dnl (third field in two places below) and set the PNGLIB_RELEASE +dnl variable. +dnl +dnl Major upgrades (incompatible ABI): increment the package major +dnl version (second field, or first if desired), set the minor +dnl to 0, set PNGLIB_MAJOR below *and* follow the instructions in +dnl Makefile.am to upgrade the package name. + +dnl This is here to prevent earlier autoconf from being used, it +dnl should not be necessary to regenerate configure if the time +dnl stamps are correct +AC_PREREQ([2.68]) + +dnl Version number stuff here: + +AC_INIT([libpng],[1.6.37],[png-mng-implement@lists.sourceforge.net]) +AC_CONFIG_MACRO_DIR([scripts]) + +# libpng does not follow GNU file name conventions (hence 'foreign') +# color-tests requires automake 1.11 or later +# silent-rules requires automake 1.11 or later +# dist-xz requires automake 1.11 or later +# 1.12.2 fixes a security issue in 1.11.2 and 1.12.1 +# 1.13 is required for parallel tests +AM_INIT_AUTOMAKE([1.13 foreign dist-xz color-tests silent-rules subdir-objects]) +# The following line causes --disable-maintainer-mode to be the default to +# configure. This is necessary because libpng distributions cannot rely on the +# time stamps of the autotools generated files being correct +AM_MAINTAINER_MODE + +dnl configure.ac and Makefile.am expect automake 1.11.2 or a compatible later +dnl version; aclocal.m4 will generate a failure if you use a prior version of +dnl automake, so the following is not necessary (and is not defined anyway): +dnl AM_PREREQ([1.11.2]) +dnl stop configure from automagically running automake + +PNGLIB_VERSION=1.6.37 +PNGLIB_MAJOR=1 +PNGLIB_MINOR=6 +PNGLIB_RELEASE=37 + +dnl End of version number stuff + +AC_CONFIG_SRCDIR([pngget.c]) +AC_CONFIG_HEADERS([config.h]) + +# Checks for programs. +AC_LANG([C]) +AC_PROG_CC +AM_PROG_AS +LT_PATH_LD +AC_PROG_CPP +AC_PROG_AWK +AC_PROG_INSTALL +AC_PROG_LN_S +AC_PROG_MAKE_SET + +dnl libtool/libtoolize; version 2.4.2 is the tested version. This or any +dnl compatible later version may be used +LT_INIT([win32-dll]) +LT_PREREQ([2.4.2]) + +# Some awks crash when confronted with pnglibconf.dfa, do a test run now +# to make sure this doesn't happen +AC_MSG_CHECKING([that AWK works]) +if ${AWK} -f ${srcdir}/scripts/options.awk out="/dev/null" version=search\ + ${srcdir}/pngconf.h ${srcdir}/scripts/pnglibconf.dfa\ + ${srcdir}/pngusr.dfa 1>&2 +then + AC_MSG_RESULT([ok]) +else + AC_MSG_FAILURE([failed], 1) +fi + +# This is a remnant of the old cc -E validation, where it may have been +# necessary to use a different preprocessor for .dfn files +DFNCPP="$CPP" +AC_SUBST(DFNCPP) + +# -Werror cannot be passed to GCC in CFLAGS because configure will fail (it +# checks the compiler with a program that generates a warning), add the +# following option to deal with this +AC_ARG_VAR(PNG_COPTS, + [additional flags for the C compiler, use this for options that would] + [cause configure itself to fail]) +AC_ARG_ENABLE(werror, + AS_HELP_STRING([[[--enable-werror[=OPT]]]], + [Pass -Werror or the given argument to the compiler if it is supported]), + [test "$enable_werror" = "yes" && enable_werror="-Werror" + if test "$enable_werror" != "no"; then + sav_CFLAGS="$CFLAGS" + CFLAGS="$enable_werror $CFLAGS" + AC_MSG_CHECKING([if the compiler allows $enable_werror]) + AC_COMPILE_IFELSE( + [AC_LANG_SOURCE([ + [int main(int argc, char **argv){] + [return argv[argc-1][0];] + [}]])], + AC_MSG_RESULT(yes) + PNG_COPTS="$PNG_COPTS $enable_werror", + AC_MSG_RESULT(no)) + CFLAGS="$sav_CFLAGS" + fi],) + +# For GCC 5 the default mode for C is -std=gnu11 instead of -std=gnu89 +# In pngpriv.h we request just the POSIX 1003.1 and C89 APIs by defining _POSIX_SOURCE to 1 +# This is incompatible with the new default mode, so we test for that and force the +# "-std=c89" compiler option: +AC_MSG_CHECKING([if we need to force back C standard to C89]) +AC_COMPILE_IFELSE( + [AC_LANG_PROGRAM([ + [#define _POSIX_SOURCE 1] + [#include ] + ])], + AC_MSG_RESULT(no),[ + if test "x$GCC" != "xyes"; then + AC_MSG_ERROR( + [Forcing back to C89 is required but the flags are only known for GCC]) + fi + AC_MSG_RESULT(yes) + CFLAGS="$CFLAGS -std=c89" +]) + +# Checks for header files. +AC_HEADER_STDC + +# Checks for typedefs, structures, and compiler characteristics. +AC_C_CONST +AC_TYPE_SIZE_T +AC_STRUCT_TM +AC_C_RESTRICT + +# Checks for library functions. +AC_FUNC_STRTOD +AC_CHECK_FUNCS([pow], , AC_CHECK_LIB(m, pow, , AC_MSG_ERROR(cannot find pow)) ) + +# Some later POSIX 1003.1 functions are required for test programs, failure here +# is soft (the corresponding test program is not built). +AC_CHECK_FUNC([clock_gettime],,[AC_MSG_WARN([not building timepng])]) +AM_CONDITIONAL([HAVE_CLOCK_GETTIME], [test "$ac_cv_func_clock_gettime" = "yes"]) + +AC_ARG_WITH(zlib-prefix, + AS_HELP_STRING([[[--with-zlib-prefix]]], + [prefix that may have been used in installed zlib]), + [ZPREFIX=${withval}], + [ZPREFIX='z_']) +AC_CHECK_LIB(z, zlibVersion, , + AC_CHECK_LIB(z, ${ZPREFIX}zlibVersion, , AC_MSG_ERROR(zlib not installed))) + +# The following is for pngvalid, to ensure it catches FP errors even on +# platforms that don't enable FP exceptions, the function appears in the math +# library (typically), it's not an error if it is not found. +AC_CHECK_LIB([m], [feenableexcept]) +AC_CHECK_FUNCS([feenableexcept]) + +AC_MSG_CHECKING([if using Solaris linker]) +SLD=`$LD --version 2>&1 | grep Solaris` +if test "$SLD"; then + have_solaris_ld=yes + AC_MSG_RESULT(yes) +else + have_solaris_ld=no + AC_MSG_RESULT(no) +fi +AM_CONDITIONAL(HAVE_SOLARIS_LD, test "$have_solaris_ld" = "yes") + +AC_MSG_CHECKING([if libraries can be versioned]) +# Special case for PE/COFF platforms: ld reports +# support for version-script, but doesn't actually +# DO anything with it. +case $host in +*cygwin* | *mingw32* | *interix* ) + have_ld_version_script=no + AC_MSG_RESULT(no) +;; +* ) + +if test "$have_solaris_ld" = "yes"; then + GLD=`$LD --help < /dev/null 2>&1 | grep 'M mapfile'` +else + GLD=`$LD --help < /dev/null 2>/dev/null | grep version-script` +fi + +if test "$GLD"; then + have_ld_version_script=yes + AC_MSG_RESULT(yes) +else + have_ld_version_script=no + AC_MSG_RESULT(no) + AC_MSG_WARN(*** You have not enabled versioned symbols.) +fi +;; +esac + +AM_CONDITIONAL(HAVE_LD_VERSION_SCRIPT, test "$have_ld_version_script" = "yes") + +if test "$have_ld_version_script" = "yes"; then + AC_MSG_CHECKING([for symbol prefix]) + SYMBOL_PREFIX=`echo "PREFIX=__USER_LABEL_PREFIX__" \ + | ${CPP-${CC-gcc} -E} - 2>&1 \ + | ${EGREP-grep} "^PREFIX=" \ + | ${SED-sed} -e "s:^PREFIX=::" -e "s:__USER_LABEL_PREFIX__::"` + AC_SUBST(SYMBOL_PREFIX) + AC_MSG_RESULT($SYMBOL_PREFIX) +fi + +# Substitutions for .in files +AC_SUBST(PNGLIB_VERSION) +AC_SUBST(PNGLIB_MAJOR) +AC_SUBST(PNGLIB_MINOR) +AC_SUBST(PNGLIB_RELEASE) + +# Additional arguments (and substitutions) +# Allow the pkg-config directory to be set +AC_ARG_WITH(pkgconfigdir, + AS_HELP_STRING([[[--with-pkgconfigdir]]], + [Use the specified pkgconfig dir (default is libdir/pkgconfig)]), + [pkgconfigdir=${withval}], + [pkgconfigdir='${libdir}/pkgconfig']) + +AC_SUBST([pkgconfigdir]) +AC_MSG_NOTICE([[pkgconfig directory is ${pkgconfigdir}]]) + +# Make the *-config binary config scripts optional +AC_ARG_WITH(binconfigs, + AS_HELP_STRING([[[--with-binconfigs]]], + [Generate shell libpng-config scripts as well as pkg-config data] + [@<:@default=yes@:>@]), + [if test "${withval}" = no; then + binconfigs= + AC_MSG_NOTICE([[libpng-config scripts will not be built]]) + else + binconfigs='${binconfigs}' + fi], + [binconfigs='${binconfigs}']) +AC_SUBST([binconfigs]) + +# Support for prefixes to the API function names; this will generate defines +# at the start of the build to rename exported library functions +AC_ARG_WITH(libpng-prefix, + AS_HELP_STRING([[[--with-libpng-prefix]]], + [prefix libpng exported function (API) names with the given value]), + [if test "${withval:-no}" != "no"; then + AC_SUBST([PNG_PREFIX], [${withval}]) + fi]) +AM_CONDITIONAL([DO_PNG_PREFIX], [test "${with_libpng_prefix:-no}" != "no"]) + +# Control over what links are made for installed files. Versioned files are +# always installed, when the following options are turned on corresponding +# unversioned links are also created (normally as symbolic links): +AC_ARG_ENABLE([unversioned-links], + AS_HELP_STRING([[[--enable-unversioned-links]]], + [Installed libpng header files are placed in a versioned subdirectory] + [and installed libpng library (including DLL) files are versioned.] + [If this option is enabled unversioned links will be created pointing to] + [the corresponding installed files. If you use libpng.pc or] + [libpng-config for all builds you do not need these links, but if you] + [compile programs directly they will typically #include and] + [link with -lpng; in that case you need the links.] + [The links can be installed manually using 'make install-header-links'] + [and 'make install-library-links' and can be removed using the] + [corresponding uninstall- targets. If you do enable this option every] + [libpng 'make install' will recreate the links to point to the just] + [installed version of libpng. The default is to create the links;] + [use --disable-unversioned-links to change this])) + +# The AM_CONDITIONAL test is written so that the default is enabled; +# --disable-unversioned-links must be given to turn the option off. +AM_CONDITIONAL([DO_INSTALL_LINKS],[test "$enable_unversioned_links" != "no"]) + +AC_ARG_ENABLE([unversioned-libpng-pc], + AS_HELP_STRING([[[--enable-unversioned-libpng-pc]]], + [Install the configuration file 'libpng.pc' as a link to the versioned] + [version. This is done by default - use --disable-unversioned-libpng-pc] + [to change this.])) +AM_CONDITIONAL([DO_INSTALL_LIBPNG_PC], + [test "$enable_unversioned_libpng_pc" != "no"]) + +AC_ARG_ENABLE([unversioned-libpng-config], + AS_HELP_STRING([[[--enable-unversioned-libpng-config]]], + [Install the configuration file 'libpng-config' as a link to the] + [versioned version. This is done by default - use] + [--disable-unversioned-libpng-config to change this.])) +AM_CONDITIONAL([DO_INSTALL_LIBPNG_CONFIG], + [test "$enable_unversioned_libpng_config" != "no"]) + +# HOST SPECIFIC OPTIONS +# ===================== +# +# DEFAULT +# ======= +# +AC_ARG_ENABLE([hardware-optimizations], + AS_HELP_STRING([[[--enable-hardware-optimizations]]], + [Enable hardware optimizations: =no/off, yes/on:]), + [case "$enableval" in + no|off) + # disable hardware optimization on all systems: + enable_arm_neon=no + AC_DEFINE([PNG_ARM_NEON_OPT], [0], + [Disable ARM_NEON optimizations]) + enable_mips_msa=no + AC_DEFINE([PNG_MIPS_MSA_OPT], [0], + [Disable MIPS_MSA optimizations]) + enable_powerpc_vsx=no + AC_DEFINE([PNG_POWERPC_VSX_OPT], [0], + [Disable POWERPC VSX optimizations]) + enable_intel_sse=no + AC_DEFINE([PNG_INTEL_SSE_OPT], [0], + [Disable INTEL_SSE optimizations]) + ;; + *) + # allow enabling hardware optimization on any system: + case "$host_cpu" in + arm*|aarch64*) + enable_arm_neon=yes + AC_DEFINE([PNG_ARM_NEON_OPT], [0], + [Enable ARM_NEON optimizations]) + ;; + mipsel*|mips64el*) + enable_mips_msa=yes + AC_DEFINE([PNG_MIPS_MSA_OPT], [0], + [Enable MIPS_MSA optimizations]) + ;; + i?86|x86_64) + enable_intel_sse=yes + AC_DEFINE([PNG_INTEL_SSE_OPT], [1], + [Enable Intel SSE optimizations]) + ;; + powerpc*|ppc64*) + enable_powerpc_vsx=yes + AC_DEFINE([PNG_POWERPC_VSX_OPT], [2], + [Enable POWERPC VSX optimizations]) + ;; + esac + ;; + esac]) + +# ARM +# === +# +# ARM NEON (SIMD) support. + +AC_ARG_ENABLE([arm-neon], + AS_HELP_STRING([[[--enable-arm-neon]]], + [Enable ARM NEON optimizations: =no/off, check, api, yes/on:] + [no/off: disable the optimizations; check: use internal checking code] + [(deprecated and poorly supported); api: disable by default, enable by] + [a call to png_set_option; yes/on: turn on unconditionally.] + [If not specified: determined by the compiler.]), + [case "$enableval" in + no|off) + # disable the default enabling on __ARM_NEON__ systems: + AC_DEFINE([PNG_ARM_NEON_OPT], [0], + [Disable ARM Neon optimizations]) + # Prevent inclusion of the assembler files below: + enable_arm_neon=no;; + check) + AC_DEFINE([PNG_ARM_NEON_CHECK_SUPPORTED], [], + [Check for ARM Neon support at run-time]);; + api) + AC_DEFINE([PNG_ARM_NEON_API_SUPPORTED], [], + [Turn on ARM Neon optimizations at run-time]);; + yes|on) + AC_DEFINE([PNG_ARM_NEON_OPT], [2], + [Enable ARM Neon optimizations]) + AC_MSG_WARN([--enable-arm-neon: please specify 'check' or 'api', if] + [you want the optimizations unconditionally pass -mfpu=neon] + [to the compiler.]);; + *) + AC_MSG_ERROR([--enable-arm-neon=${enable_arm_neon}: invalid value]) + esac]) + +# Add ARM specific files to all builds where the host_cpu is arm ('arm*') or +# where ARM optimizations were explicitly requested (this allows a fallback if a +# future host CPU does not match 'arm*') + +AM_CONDITIONAL([PNG_ARM_NEON], + [test "$enable_arm_neon" != 'no' && + case "$host_cpu" in + arm*|aarch64*) :;; + *) test "$enable_arm_neon" != '';; + esac]) + +# MIPS +# === +# +# MIPS MSA (SIMD) support. + +AC_ARG_ENABLE([mips-msa], + AS_HELP_STRING([[[--enable-mips-msa]]], + [Enable MIPS MSA optimizations: =no/off, check, api, yes/on:] + [no/off: disable the optimizations; check: use internal checking code] + [(deprecated and poorly supported); api: disable by default, enable by] + [a call to png_set_option; yes/on: turn on unconditionally.] + [If not specified: determined by the compiler.]), + [case "$enableval" in + no|off) + # disable the default enabling on __mips_msa systems: + AC_DEFINE([PNG_MIPS_MSA_OPT], [0], + [Disable MIPS MSA optimizations]) + # Prevent inclusion of the assembler files below: + enable_mips_msa=no;; + check) + AC_DEFINE([PNG_MIPS_MSA_CHECK_SUPPORTED], [], + [Check for MIPS MSA support at run-time]);; + api) + AC_DEFINE([PNG_MIPS_MSA_API_SUPPORTED], [], + [Turn on MIPS MSA optimizations at run-time]);; + yes|on) + AC_DEFINE([PNG_MIPS_MSA_OPT], [2], + [Enable MIPS MSA optimizations]) + AC_MSG_WARN([--enable-mips-msa: please specify 'check' or 'api', if] + [you want the optimizations unconditionally pass '-mmsa -mfp64'] + [to the compiler.]);; + *) + AC_MSG_ERROR([--enable-mips-msa=${enable_mips_msa}: invalid value]) + esac]) + +# Add MIPS specific files to all builds where the host_cpu is mips ('mips*') or +# where MIPS optimizations were explicitly requested (this allows a fallback if a +# future host CPU does not match 'mips*') + +AM_CONDITIONAL([PNG_MIPS_MSA], + [test "$enable_mips_msa" != 'no' && + case "$host_cpu" in + mipsel*|mips64el*) :;; + esac]) + +# INTEL +# ===== +# +# INTEL SSE (SIMD) support. + +AC_ARG_ENABLE([intel-sse], + AS_HELP_STRING([[[--enable-intel-sse]]], + [Enable Intel SSE optimizations: =no/off, yes/on:] + [no/off: disable the optimizations;] + [yes/on: enable the optimizations.] + [If not specified: determined by the compiler.]), + [case "$enableval" in + no|off) + # disable the default enabling: + AC_DEFINE([PNG_INTEL_SSE_OPT], [0], + [Disable Intel SSE optimizations]) + # Prevent inclusion of the assembler files below: + enable_intel_sse=no;; + yes|on) + AC_DEFINE([PNG_INTEL_SSE_OPT], [1], + [Enable Intel SSE optimizations]);; + *) + AC_MSG_ERROR([--enable-intel-sse=${enable_intel_sse}: invalid value]) + esac]) + +# Add Intel specific files to all builds where the host_cpu is Intel ('x86*') +# or where Intel optimizations were explicitly requested (this allows a +# fallback if a future host CPU does not match 'x86*') +AM_CONDITIONAL([PNG_INTEL_SSE], + [test "$enable_intel_sse" != 'no' && + case "$host_cpu" in + i?86|x86_64) :;; + *) test "$enable_intel_sse" != '';; + esac]) + +# PowerPC +# === +# +# PowerPC VSX (SIMD) support. + +AC_ARG_ENABLE([powerpc-vsx], +AS_HELP_STRING([[[--enable-powerpc-vsx]]], + [Enable POWERPC VSX optimizations: =no/off, check, api, yes/on:] + [no/off: disable the optimizations; check: use internal checking code] + [api: disable by default, enable by a call to png_set_option] + [yes/on: turn on unconditionally.] + [If not specified: determined by the compiler.]), + [case "$enableval" in + no|off) + # disable the default enabling on __ppc64__ systems: + AC_DEFINE([PNG_POWERPC_VSX_OPT], [0], + [Disable POWERPC VSX optimizations]) + # Prevent inclusion of the platform specific files below: + enable_powerpc_vsx=no;; + check) + AC_DEFINE([PNG_POWERPC_VSX_CHECK_SUPPORTED], [], + [Check for POWERPC VSX support at run-time]) + AC_MSG_WARN([--enable-powerpc-vsx Please check contrib/powerpc/README file] + [for the list of supported OSes.]);; + api) + AC_DEFINE([PNG_POWERPC_VSX_API_SUPPORTED], [], + [Turn on POWERPC VSX optimizations at run-time]);; + yes|on) + AC_DEFINE([PNG_POWERPC_VSX_OPT], [2], + [Enable POWERPC VSX optimizations]) + AC_MSG_WARN([--enable-powerpc-vsx: please specify 'check' or 'api', if] + [you want the optimizations unconditionally pass '-maltivec -mvsx'] + [or '-mcpu=power8'to the compiler.]);; + *) + AC_MSG_ERROR([--enable-powerpc-vsx=${enable_powerpc_vsx}: invalid value]) + esac]) + +# Add PowerPC specific files to all builds where the host_cpu is powerpc('powerpc*') or +# where POWERPC optimizations were explicitly requested (this allows a fallback if a +# future host CPU does not match 'powerpc*') + +AM_CONDITIONAL([PNG_POWERPC_VSX], + [test "$enable_powerpc_vsx" != 'no' && + case "$host_cpu" in + powerpc*|ppc64*) :;; + esac]) + + +AC_MSG_NOTICE([[Extra options for compiler: $PNG_COPTS]]) + +# Config files, substituting as above +AC_CONFIG_FILES([Makefile libpng.pc:libpng.pc.in]) +AC_CONFIG_FILES([libpng-config:libpng-config.in], + [chmod +x libpng-config]) + +AC_OUTPUT diff --git a/extern/libpng/include/contrib/README.txt b/extern/libpng/contrib/README.txt similarity index 55% rename from extern/libpng/include/contrib/README.txt rename to extern/libpng/contrib/README.txt index bcd433d352..97963c6d54 100644 --- a/extern/libpng/include/contrib/README.txt +++ b/extern/libpng/contrib/README.txt @@ -1,4 +1,5 @@ This "contrib" directory contains contributions which are not necessarily under the libpng license, although all are open source. They are not part of -libpng proper and are not used for building the library. +libpng proper and are not used for building the library, although some are used +for testing the library via "make check". diff --git a/extern/libpng/contrib/arm-neon/README b/extern/libpng/contrib/arm-neon/README new file mode 100644 index 0000000000..b4248cf289 --- /dev/null +++ b/extern/libpng/contrib/arm-neon/README @@ -0,0 +1,83 @@ +OPERATING SYSTEM SPECIFIC ARM NEON DETECTION +-------------------------------------------- + +Detection of the ability to execute ARM NEON on an ARM processor requires +operating system support. (The information is not available in user mode.) + +HOW TO USE THIS +--------------- + +This directory contains C code fragments that can be included in arm/arm_init.c +by setting the macro PNG_ARM_NEON_FILE to the file name in "" or <> at build +time. This setting is not recorded in pnglibconf.h and can be changed simply by +rebuilding arm/arm_init.o with the required macro definition. + +For any of this code to be used the ARM NEON code must be enabled and run time +checks must be supported. I.e.: + +#if PNG_ARM_NEON_OPT > 0 +#ifdef PNG_ARM_NEON_CHECK_SUPPORTED + +This is done in a 'configure' build by passing configure the argument: + + --enable-arm-neon=check + +Apart from the basic Linux implementation in contrib/arm-neon/linux.c this code +is unsupported. That means that it is not even compiled on a regular basis and +may be broken in any given minor release. + +FILE FORMAT +----------- + +Each file documents its testing status as of the last time it was tested (which +may have been a long time ago): + +STATUS: one of: + SUPPORTED: This indicates that the file is included in the regularly + performed test builds and bugs are fixed when discovered. + COMPILED: This indicates that the code did compile at least once. See the + more detailed description for the extent to which the result was + successful. + TESTED: This means the code was fully compiled into the libpng test programs + and these were run at least once. + +BUG REPORTS: an email address to which to send reports of problems + +The file is a fragment of C code. It should not define any 'extern' symbols; +everything should be static. It must define the function: + +static int png_have_neon(png_structp png_ptr); + +That function must return 1 if ARM NEON instructions are supported, 0 if not. +It must not execute png_error unless it detects a bug. A png_error will prevent +the reading of the PNG and in the future, writing too. + +BUG REPORTS +----------- + +If you mail a bug report for any file that is not SUPPORTED there may only be +limited response. Consider fixing it and sending a patch to fix the problem - +this is more likely to result in action. + +CONTRIBUTIONS +------------- + +You may send contributions of new implementations to +png-mng-implement@sourceforge.net. Please write code in strict C90 C where +possible. Obviously OS dependencies are to be expected. If you submit code you +must have the authors permission and it must have a license that is acceptable +to the current maintainer; in particular that license must permit modification +and redistribution. + +Please try to make the contribution a single file and give the file a clear and +unambiguous name that identifies the target OS. If multiple files really are +required put them all in a sub-directory. + +You must also be prepared to handle bug reports from users of the code, either +by joining the png-mng-implement mailing list or by providing an email for the +"BUG REPORTS" entry or both. Please make sure that the header of the file +contains the STATUS and BUG REPORTS fields as above. + +Please list the OS requirements as precisely as possible. Ideally you should +also list the environment in which the code has been tested and certainly list +any environments where you suspect it might not work. diff --git a/extern/libpng/contrib/arm-neon/android-ndk.c b/extern/libpng/contrib/arm-neon/android-ndk.c new file mode 100644 index 0000000000..fb3a4898de --- /dev/null +++ b/extern/libpng/contrib/arm-neon/android-ndk.c @@ -0,0 +1,39 @@ +/* contrib/arm-neon/android-ndk.c + * + * Copyright (c) 2014 Glenn Randers-Pehrson + * Written by John Bowler, 2014. + * Last changed in libpng 1.6.10 [March 6, 2014] + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + * + * SEE contrib/arm-neon/README before reporting bugs + * + * STATUS: COMPILED, UNTESTED + * BUG REPORTS: png-mng-implement@sourceforge.net + * + * png_have_neon implemented for the Android NDK, see: + * + * Documentation: + * http://www.kandroid.org/ndk/docs/CPU-ARM-NEON.html + * https://code.google.com/p/android/issues/detail?id=49065 + * + * NOTE: this requires that libpng is built against the Android NDK and linked + * with an implementation of the Android ARM 'cpu-features' library. The code + * has been compiled only, not linked: no version of the library has been found, + * only the header files exist in the NDK. + */ +#include + +static int +png_have_neon(png_structp png_ptr) +{ + /* This is a whole lot easier than the linux code, however it is probably + * implemented as below, therefore it is better to cache the result (these + * function calls may be slow!) + */ + PNG_UNUSED(png_ptr) + return android_getCpuFamily() == ANDROID_CPU_FAMILY_ARM && + (android_getCpuFeatures() & ANDROID_CPU_ARM_FEATURE_NEON) != 0; +} diff --git a/extern/libpng/contrib/arm-neon/linux-auxv.c b/extern/libpng/contrib/arm-neon/linux-auxv.c new file mode 100644 index 0000000000..4d26bd3b35 --- /dev/null +++ b/extern/libpng/contrib/arm-neon/linux-auxv.c @@ -0,0 +1,120 @@ +/* contrib/arm-neon/linux-auxv.c + * + * Copyright (c) 2014 Glenn Randers-Pehrson + * Written by Mans Rullgard, 2011. + * Last changed in libpng 1.6.10 [March 6, 2014] + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + * + * SEE contrib/arm-neon/README before reporting bugs + * + * STATUS: COMPILED, TESTED + * BUG REPORTS: png-mng-implement@sourceforge.net + * + * png_have_neon implemented for Linux versions which allow access to + * /proc/self/auxv. This is probably faster, cleaner and safer than the code to + * read /proc/cpuinfo in contrib/arm-neon/linux, however it is yet another piece + * of potentially untested code and has more complex dependencies than the code + * to read cpuinfo. + * + * This generic __linux__ implementation requires reading /proc/self/auxv and + * looking at each element for one that records NEON capabilities. + */ +#include /* for POSIX 1003.1 */ +#include /* for EINTR */ + +#include +#include +#include +#include +#include + +/* A read call may be interrupted, in which case it returns -1 and sets errno to + * EINTR if nothing was done, otherwise (if something was done) a partial read + * may result. + */ +static size_t +safe_read(png_structp png_ptr, int fd, void *buffer_in, size_t nbytes) +{ + size_t ntotal = 0; + char *buffer = png_voidcast(char*, buffer_in); + + while (nbytes > 0) + { + unsigned int nread; + int iread; + + /* Passing nread > INT_MAX to read is implementation defined in POSIX + * 1003.1, therefore despite the unsigned argument portable code must + * limit the value to INT_MAX! + */ + if (nbytes > INT_MAX) + nread = INT_MAX; + + else + nread = (unsigned int)/*SAFE*/nbytes; + + iread = read(fd, buffer, nread); + + if (iread == -1) + { + /* This is the devil in the details, a read can terminate early with 0 + * bytes read because of EINTR, yet it still returns -1 otherwise end + * of file cannot be distinguished. + */ + if (errno != EINTR) + { + png_warning(png_ptr, "/proc read failed"); + return 0; /* I.e., a permanent failure */ + } + } + + else if (iread < 0) + { + /* Not a valid 'read' result: */ + png_warning(png_ptr, "OS /proc read bug"); + return 0; + } + + else if (iread > 0) + { + /* Continue reading until a permanent failure, or EOF */ + buffer += iread; + nbytes -= (unsigned int)/*SAFE*/iread; + ntotal += (unsigned int)/*SAFE*/iread; + } + + else + return ntotal; + } + + return ntotal; /* nbytes == 0 */ +} + +static int +png_have_neon(png_structp png_ptr) +{ + int fd = open("/proc/self/auxv", O_RDONLY); + Elf32_auxv_t aux; + + /* Failsafe: failure to open means no NEON */ + if (fd == -1) + { + png_warning(png_ptr, "/proc/self/auxv open failed"); + return 0; + } + + while (safe_read(png_ptr, fd, &aux, sizeof aux) == sizeof aux) + { + if (aux.a_type == AT_HWCAP && (aux.a_un.a_val & HWCAP_NEON) != 0) + { + close(fd); + return 1; + } + } + + close(fd); + return 0; +} diff --git a/extern/libpng/contrib/arm-neon/linux.c b/extern/libpng/contrib/arm-neon/linux.c new file mode 100644 index 0000000000..a9bc360dd5 --- /dev/null +++ b/extern/libpng/contrib/arm-neon/linux.c @@ -0,0 +1,161 @@ +/* contrib/arm-neon/linux.c + * + * Last changed in libpng 1.6.31 [July 27, 2017] + * Copyright (c) 2014, 2017 Glenn Randers-Pehrson + * Written by John Bowler, 2014, 2017. + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + * + * SEE contrib/arm-neon/README before reporting bugs + * + * STATUS: SUPPORTED + * BUG REPORTS: png-mng-implement@sourceforge.net + * + * png_have_neon implemented for Linux by reading the widely available + * pseudo-file /proc/cpuinfo. + * + * This code is strict ANSI-C and is probably moderately portable; it does + * however use and it assumes that /proc/cpuinfo is never localized. + */ +#include + +static int +png_have_neon(png_structp png_ptr) +{ + FILE *f = fopen("/proc/cpuinfo", "rb"); + + if (f != NULL) + { + /* This is a simple state machine which reads the input byte-by-byte until + * it gets a match on the 'neon' feature or reaches the end of the stream. + */ + static const char ch_feature[] = { 70, 69, 65, 84, 85, 82, 69, 83 }; + static const char ch_neon[] = { 78, 69, 79, 78 }; + + enum + { + StartLine, Feature, Colon, StartTag, Neon, HaveNeon, SkipTag, SkipLine + } state; + int counter; + + for (state=StartLine, counter=0;;) + { + int ch = fgetc(f); + + if (ch == EOF) + { + /* EOF means error or end-of-file, return false; neon at EOF is + * assumed to be a mistake. + */ + fclose(f); + return 0; + } + + switch (state) + { + case StartLine: + /* Match spaces at the start of line */ + if (ch <= 32) /* skip control characters and space */ + break; + + counter=0; + state = Feature; + /* FALLTHROUGH */ + + case Feature: + /* Match 'FEATURE', ASCII case insensitive. */ + if ((ch & ~0x20) == ch_feature[counter]) + { + if (++counter == (sizeof ch_feature)) + state = Colon; + break; + } + + /* did not match 'feature' */ + state = SkipLine; + /* FALLTHROUGH */ + + case SkipLine: + skipLine: + /* Skip everything until we see linefeed or carriage return */ + if (ch != 10 && ch != 13) + break; + + state = StartLine; + break; + + case Colon: + /* Match any number of space or tab followed by ':' */ + if (ch == 32 || ch == 9) + break; + + if (ch == 58) /* i.e. ':' */ + { + state = StartTag; + break; + } + + /* Either a bad line format or a 'feature' prefix followed by + * other characters. + */ + state = SkipLine; + goto skipLine; + + case StartTag: + /* Skip space characters before a tag */ + if (ch == 32 || ch == 9) + break; + + state = Neon; + counter = 0; + /* FALLTHROUGH */ + + case Neon: + /* Look for 'neon' tag */ + if ((ch & ~0x20) == ch_neon[counter]) + { + if (++counter == (sizeof ch_neon)) + state = HaveNeon; + break; + } + + state = SkipTag; + /* FALLTHROUGH */ + + case SkipTag: + /* Skip non-space characters */ + if (ch == 10 || ch == 13) + state = StartLine; + + else if (ch == 32 || ch == 9) + state = StartTag; + break; + + case HaveNeon: + /* Have seen a 'neon' prefix, but there must be a space or new + * line character to terminate it. + */ + if (ch == 10 || ch == 13 || ch == 32 || ch == 9) + { + fclose(f); + return 1; + } + + state = SkipTag; + break; + + default: + png_error(png_ptr, "png_have_neon: internal error (bug)"); + } + } + } + +#ifdef PNG_WARNINGS_SUPPORTED + else + png_warning(png_ptr, "/proc/cpuinfo open failed"); +#endif + + return 0; +} diff --git a/extern/libpng/contrib/conftest/README b/extern/libpng/contrib/conftest/README new file mode 100644 index 0000000000..0f472791f2 --- /dev/null +++ b/extern/libpng/contrib/conftest/README @@ -0,0 +1,49 @@ +This directory contains test configuration files, currently always '.dfa' files +intended to be used in the build by setting the make macro DFA_XTRA to the name +of the file. + +These files are used in release validation of the 'configure' builds of libpng +by building 'make check', or 'make all-am' for cross-builds, with each .dfa +file. + +The files in this directory may change between minor releases, however +contributions describing specific builds of libpng are welcomed. There is no +guarantee that libpng will continue to build with such configurations; support +for given configurations can be, and has been, dropped between successive minor +releases. However if a .dfa file describing a configuration is not in this +directory it is very unlikely that it will be tested before a minor release! + +You can use these .dfa files as the basis of new configurations. Files in this +directory should not have any use restrictions or restrictive licenses. + +This directory is not included in the .zip and .7z distributions, which do +not contain 'configure' scripts. + +DOCUMENTATION +============= + +Examples: + ${srcdir}/pngusr.dfa + ${srcdir}/contrib/pngminim/*/pngusr.dfa + +Documentation of the options: + ${srcdir}/scripts/pnglibconf.dfa + +Documentation of the file format: + ${srcdir}/scripts/options.awk + +FILE NAMING +=========== + +File names in this directory may NOT contain any of the five characters: + + - , + * ? + +Neither may they contain any space character. + +While other characters may be used it is strongly suggested that file names be +limited to lower case Latiin alphabetic characters (a-z), digits (0-9) and, if +necessary the underscore (_) character. File names should be about 8 characters +long (excluding the .dfa extension). Submitted .dfa files should have names +between 7 and 16 characters long, shorter names (6 characters or less) are +reserved for standard tests. diff --git a/extern/libpng/contrib/conftest/pngcp.dfa b/extern/libpng/contrib/conftest/pngcp.dfa new file mode 100644 index 0000000000..31c411d5f8 --- /dev/null +++ b/extern/libpng/contrib/conftest/pngcp.dfa @@ -0,0 +1,57 @@ +# pngcp.dfa +# Build time configuration of libpng +# +# Author: John Bowler +# Copyright: (c) John Bowler, 2016 +# Usage rights: +# To the extent possible under law, the author has waived all copyright and +# related or neighboring rights to this work. This work is published from: +# United States. +# +# Build libpng with support for pngcp. This means just png_read_png, +# png_write_png and small number of configuration settings. +# +everything = off + +# This option is specific to this configuration; it adds a #define to the +# generated pnglibconf.h which turns on the (not portable) timing option for +# pngcp. Note that any option is automatically preceded by PNG_; there is no +# way round this and this is deliberate. +option PNGCP_TIMING + +# Because of the everything off above the option must also be turned on. This +# may not be done in one step because it is safer and avoids mis-spelled options +# in user .dfa files to error out if an unrecognized option is turned on. +option PNGCP_TIMING on + +# Options to turn on png_read_png and png_write_png: +option INFO_IMAGE on +option SEQUENTIAL_READ on +option EASY_ACCESS on +option WRITE on +option WRITE_16BIT on +option WRITE_FILTER on + +# pngcp needs this to preserve unknown chunks, switching all these on means that +# pngcp can work without explicit known chunk reading support +option UNKNOWN_CHUNKS on +option SET_UNKNOWN_CHUNKS on +option HANDLE_AS_UNKNOWN on +option SAVE_UNKNOWN_CHUNKS on +option WRITE_UNKNOWN_CHUNKS on + +# pngcp needs this to handle palette files with invalid indices: +option CHECK_FOR_INVALID_INDEX on +option GET_PALETTE_MAX on + +# Pre-libpng 1.7 pngcp has to stash text chunks manually, post 1.7 without this +# text chunks should be handled as unknown ok. +option TEXT on + +# this is used to turn off limits: +option USER_LIMITS on +option SET_USER_LIMITS on + +# these are just required for specific customizations +option WRITE_CUSTOMIZE_ZTXT_COMPRESSION on +option WRITE_CUSTOMIZE_COMPRESSION on diff --git a/extern/libpng/contrib/conftest/read.dfa b/extern/libpng/contrib/conftest/read.dfa new file mode 100644 index 0000000000..21e88d01a2 --- /dev/null +++ b/extern/libpng/contrib/conftest/read.dfa @@ -0,0 +1,58 @@ +# read.dfa +# Build time configuration of libpng +# +# Author: John Bowler +# Copyright: (c) John Bowler, 2013 +# Usage rights: +# To the extent possible under law, the author has waived all copyright and +# related or neighboring rights to this work. This work is published from: +# United States. +# +# Build libpng with basic read support. This enables the lowest level libpng +# read API - the one where the calling code has to use a loop to read each row. +# At present this is the API used by most programs. +# +# Support is enabled only for those chunks and transformations that are +# typically required - others can be added easily. +# + +everything = off + +# The sequential read code is enabled here; the progressive code can be used +# instead but there is no point enabling both. + +option SEQUENTIAL_READ on + +# Likewise it is pointless enabling both fixed and floating point APIs. Choose +# one or the other for both the API and the internal math. + +#Fixed point: +#option FIXED_POINT on +#option FLOATING_ARITHMETIC off + +#Floating point: +option FLOATING_POINT on +option FLOATING_ARITHMETIC on + +# Basic error handling, IO and user memory support. The latter allows the +# application program to provide its own implementations of 'malloc' and 'free'. +option SETJMP on +option STDIO on +option USER_MEM on + +# To read the full set of PNG images correctly interlace, transparency and +# 16-bit support is required. The application can implement interlace itself, +# but very few do and it's no longer possible to disable it when READ is +# enabled. +option READ_tRNS on +option READ_16BIT on + +# Everything else is application dependent. This file assumes the app handles +# all the native PNG bit layouts, so it doesn't need any of layout change +# transforms, but needs libpng to perform gamma correction. It doesn't do any +# colorspace stuff and ignores the 'significant bit' information. +# +# If your app always expands the image to a limited set of bit layouts you +# probably want to consider using the simplified API instead of the low level +# one - see png.h and s_read.dfa. +option READ_GAMMA on diff --git a/extern/libpng/contrib/conftest/s_read.dfa b/extern/libpng/contrib/conftest/s_read.dfa new file mode 100644 index 0000000000..cb1ce0ba65 --- /dev/null +++ b/extern/libpng/contrib/conftest/s_read.dfa @@ -0,0 +1,35 @@ +# s_read.dfa +# Build time configuration of libpng +# +# Author: John Bowler +# Copyright: (c) John Bowler, 2013 +# Usage rights: +# To the extent possible under law, the author has waived all copyright and +# related or neighboring rights to this work. This work is published from: +# United States. +# +# Build libpng with simplified read support (only). This builds a minimal +# libpng able to read all PNG formats and convert them into a small number of +# well understood memory formats. +# + +everything = off + +option SIMPLIFIED_READ on + +# It isn't necessary to chose fixed or floating point for the APIs because the +# simplified API doesn't need fixed or floating point numbers. It is necessary +# to chose an internal math implementation. The default (because of 'everything +# = off') is fixed point - turn the floating point implementation on if you have +# hardware floating point or prefer your software floating point implementation. +option FLOATING_ARITHMETIC on + +# This is not strictly necessary, but without it the message strings in the API +# will not be filled in +option ERROR_TEXT on + +# Switching these options on enables the 'AFIRST' and 'BGR' formats - you don't +# need this if you don't use them, they just allow the in-memory layout to be +# changed to match common hardware formats. +option SIMPLIFIED_READ_AFIRST on +option SIMPLIFIED_READ_BGR on diff --git a/extern/libpng/contrib/conftest/s_write.dfa b/extern/libpng/contrib/conftest/s_write.dfa new file mode 100644 index 0000000000..e540a46dc8 --- /dev/null +++ b/extern/libpng/contrib/conftest/s_write.dfa @@ -0,0 +1,33 @@ +# s_write.dfa +# Build time configuration of libpng +# +# Author: John Bowler +# Copyright: (c) John Bowler, 2013 +# Usage rights: +# To the extent possible under law, the author has waived all copyright and +# related or neighboring rights to this work. This work is published from: +# United States. +# +# Build libpng with (just) simplified write support +# + +everything = off + +option SIMPLIFIED_WRITE on + +# It isn't necessary to chose fixed or floating point for the APIs because the +# simplified API doesn't need fixed or floating point numbers. It is necessary +# to chose an internal math implementation. The default (because of 'everything +# = off') is fixed point - turn the floating point implementation on if you have +# hardware floating point or prefer your software floating point implementation. +option FLOATING_ARITHMETIC on + +# This is not strictly necessary, but without it the message strings in the API +# will not be filled in +option ERROR_TEXT on + +# Switching these options on enables the 'AFIRST' and 'BGR' formats - you don't +# need this if you don't use them, they just allow the in-memory layout to be +# changed to match common hardware formats. +option SIMPLIFIED_WRITE_AFIRST on +option SIMPLIFIED_WRITE_BGR on diff --git a/extern/libpng/contrib/conftest/simple.dfa b/extern/libpng/contrib/conftest/simple.dfa new file mode 100644 index 0000000000..0419333445 --- /dev/null +++ b/extern/libpng/contrib/conftest/simple.dfa @@ -0,0 +1,36 @@ +# simple.dfa +# Build time configuration of libpng +# +# Author: John Bowler +# Copyright: (c) John Bowler, 2013 +# Usage rights: +# To the extent possible under law, the author has waived all copyright and +# related or neighboring rights to this work. This work is published from: +# United States. +# +# Build libpng with just the simplified APIs (read and write). +# + +everything = off + +option SIMPLIFIED_WRITE on +option SIMPLIFIED_READ on + +# It isn't necessary to chose fixed or floating point for the APIs because the +# simplified API doesn't need fixed or floating point numbers. It is necessary +# to chose an internal math implementation. The default (because of 'everything +# = off') is fixed point - turn the floating point implementation on if you have +# hardware floating point or prefer your software floating point implementation. +option FLOATING_ARITHMETIC on + +# This is not strictly necessary, but without it the message strings in the API +# will not be filled in +option ERROR_TEXT on + +# Switching these options on enables the 'AFIRST' and 'BGR' formats - you don't +# need this if you don't use them, they just allow the in-memory layout to be +# changed to match common hardware formats. +option SIMPLIFIED_READ_AFIRST on +option SIMPLIFIED_READ_BGR on +option SIMPLIFIED_WRITE_AFIRST on +option SIMPLIFIED_WRITE_BGR on diff --git a/extern/libpng/contrib/conftest/write.dfa b/extern/libpng/contrib/conftest/write.dfa new file mode 100644 index 0000000000..3319aabeeb --- /dev/null +++ b/extern/libpng/contrib/conftest/write.dfa @@ -0,0 +1,45 @@ +# write.dfa +# Build time configuration of libpng +# +# Author: John Bowler +# Copyright: (c) John Bowler, 2013 +# Usage rights: +# To the extent possible under law, the author has waived all copyright and +# related or neighboring rights to this work. This work is published from: +# United States. +# +# Build libpng with no read support and minimal write support. +# + +everything = off + +# Switch on the write code - this makes a minimalist encoder + +option WRITE on + +# Choose fixed or floating point APIs and arithmetic. The choices are +# independent but normally they will match. It is typically better to use the +# floating point if you have floating point hardware. If you don't know, or +# (perhaps) to make libpng smaller used fixed point throughout. + +#Fixed point: +#option FIXED_POINT on +#option FLOATING_ARITHMETIC off + +#Floating point: +option FLOATING_POINT on +option FLOATING_ARITHMETIC on + +# Basic error handling, IO and user memory support. The latter allows the +# application program to provide its own implementations of 'malloc' and 'free'. +option SETJMP on +option STDIO on +option USER_MEM on + +# Everything else is optional. Unlike the read code in libpng the write code +# does not need to deal with arbitrary formats, so only add support for things +# you really do write! For example you might only write sRGB images, sometimes +# with transparency and never write 16 bit images, so: +option WRITE_sRGB on +option WRITE_tRNS on +#option WRITE_16BIT off (this is the default with 'everything = off') diff --git a/extern/libpng/contrib/examples/README.txt b/extern/libpng/contrib/examples/README.txt new file mode 100644 index 0000000000..48dab4f0fd --- /dev/null +++ b/extern/libpng/contrib/examples/README.txt @@ -0,0 +1,24 @@ + +This directory (contrib/examples) contains examples of libpng usage. + +NO COPYRIGHT RIGHTS ARE CLAIMED TO ANY OF THE FILES IN THIS DIRECTORY. + +To the extent possible under law, the authors have waived all copyright and +related or neighboring rights to this work. This work is published from: +United States. + +The files may be used freely in any way. The intention is that appropriate +parts of the files be used in other libpng-using programs without any need for +the authors of the using code to seek copyright or license from the original +authors. + +The source code and comments in this directory are the original work of the +people named below. No other person or organization has made contributions to +the work in this directory. + +ORIGINAL AUTHORS + The following people have contributed to the code in this directory. None + of the people below claim any rights with regard to the contents of this + directory. + + John Bowler diff --git a/extern/libpng/contrib/examples/iccfrompng.c b/extern/libpng/contrib/examples/iccfrompng.c new file mode 100644 index 0000000000..00056abfd7 --- /dev/null +++ b/extern/libpng/contrib/examples/iccfrompng.c @@ -0,0 +1,185 @@ +/*- iccfrompng + * + * COPYRIGHT: Written by John Cunningham Bowler, 2011. + * To the extent possible under law, the author has waived all copyright and + * related or neighboring rights to this work. This work is published from: + * United States. + * + * Extract any icc profiles found in the given PNG files. This is a simple + * example of a program that extracts information from the header of a PNG file + * without processing the image. Notice that some header information may occur + * after the image data. Textual data and comments are an example; the approach + * in this file won't work reliably for such data because it only looks for the + * information in the section of the file that precedes the image data. + * + * Compile and link against libpng and zlib, plus anything else required on the + * system you use. + * + * To use supply a list of PNG files containing iCCP chunks, the chunks will be + * extracted to a similarly named file with the extension replaced by 'icc', + * which will be overwritten without warning. + */ +#include +#include +#include +#include + +#include + +#if defined(PNG_READ_SUPPORTED) && defined(PNG_STDIO_SUPPORTED) && \ + defined (PNG_iCCP_SUPPORTED) + + +static int verbose = 1; +static png_byte no_profile[] = "no profile"; + +static png_bytep +extract(FILE *fp, png_uint_32 *proflen) +{ + png_structp png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING,0,0,0); + png_infop info_ptr = NULL; + png_bytep result = NULL; + + /* Initialize for error or no profile: */ + *proflen = 0; + + if (png_ptr == NULL) + { + fprintf(stderr, "iccfrompng: version library mismatch?\n"); + return 0; + } + + if (setjmp(png_jmpbuf(png_ptr))) + { + png_destroy_read_struct(&png_ptr, &info_ptr, NULL); + return 0; + } + + png_init_io(png_ptr, fp); + + info_ptr = png_create_info_struct(png_ptr); + if (info_ptr == NULL) + png_error(png_ptr, "OOM allocating info structure"); + + png_read_info(png_ptr, info_ptr); + + { + png_charp name; + int compression_type; + png_bytep profile; + + if (png_get_iCCP(png_ptr, info_ptr, &name, &compression_type, &profile, + proflen) & PNG_INFO_iCCP) + { + result = malloc(*proflen); + if (result != NULL) + memcpy(result, profile, *proflen); + + else + png_error(png_ptr, "OOM allocating profile buffer"); + } + + else + result = no_profile; + } + + png_destroy_read_struct(&png_ptr, &info_ptr, NULL); + return result; +} + +static int +extract_one_file(const char *filename) +{ + int result = 0; + FILE *fp = fopen(filename, "rb"); + + if (fp != NULL) + { + png_uint_32 proflen = 0; + png_bytep profile = extract(fp, &proflen); + + if (profile != NULL && profile != no_profile) + { + size_t len; + char *output; + + { + const char *ep = strrchr(filename, '.'); + + if (ep != NULL) + len = ep-filename; + + else + len = strlen(filename); + } + + output = malloc(len + 5); + if (output != NULL) + { + FILE *of; + + memcpy(output, filename, len); + strcpy(output+len, ".icc"); + + of = fopen(output, "wb"); + if (of != NULL) + { + if (fwrite(profile, proflen, 1, of) == 1 && + fflush(of) == 0 && + fclose(of) == 0) + { + if (verbose) + printf("%s -> %s\n", filename, output); + /* Success return */ + result = 1; + } + + else + { + fprintf(stderr, "%s: error writing profile\n", output); + if (remove(output)) + fprintf(stderr, "%s: could not remove file\n", output); + } + } + + else + fprintf(stderr, "%s: failed to open output file\n", output); + + free(output); + } + + else + fprintf(stderr, "%s: OOM allocating string!\n", filename); + + free(profile); + } + + else if (verbose && profile == no_profile) + printf("%s has no profile\n", filename); + } + + else + fprintf(stderr, "%s: could not open file\n", filename); + + return result; +} + +int +main(int argc, char **argv) +{ + int i; + int extracted = 0; + + for (i=1; i +#include +#include /* required for error handling */ + +/* Normally use here to get the installed libpng, but this is done to + * ensure the code picks up the local libpng implementation: + */ +#include "../../png.h" + +#if defined(PNG_READ_SUPPORTED) && defined(PNG_SEQUENTIAL_READ_SUPPORTED) + +/* Return component 'c' of pixel 'x' from the given row. */ +static unsigned int +component(png_const_bytep row, png_uint_32 x, unsigned int c, + unsigned int bit_depth, unsigned int channels) +{ + /* PNG images can be up to 2^31 pixels wide, but this means they can be up to + * 2^37 bits wide (for a 64-bit pixel - the largest possible) and hence 2^34 + * bytes wide. Since the row fitted into memory, however, the following must + * work: + */ + png_uint_32 bit_offset_hi = bit_depth * ((x >> 6) * channels); + png_uint_32 bit_offset_lo = bit_depth * ((x & 0x3f) * channels + c); + + row = (png_const_bytep)(((const png_byte (*)[8])row) + bit_offset_hi); + row += bit_offset_lo >> 3; + bit_offset_lo &= 0x07; + + /* PNG pixels are packed into bytes to put the first pixel in the highest + * bits of the byte and into two bytes for 16-bit values with the high 8 bits + * first, so: + */ + switch (bit_depth) + { + case 1: return (row[0] >> (7-bit_offset_lo)) & 0x01; + case 2: return (row[0] >> (6-bit_offset_lo)) & 0x03; + case 4: return (row[0] >> (4-bit_offset_lo)) & 0x0f; + case 8: return row[0]; + case 16: return (row[0] << 8) + row[1]; + default: + /* This should never happen; it indicates a bug in this program or in + * libpng itself: + */ + fprintf(stderr, "pngpixel: invalid bit depth %u\n", bit_depth); + exit(1); + } +} + +/* Print a pixel from a row returned by libpng; determine the row format, find + * the pixel, and print the relevant information to stdout. + */ +static void +print_pixel(png_structp png_ptr, png_infop info_ptr, png_const_bytep row, + png_uint_32 x) +{ + unsigned int bit_depth = png_get_bit_depth(png_ptr, info_ptr); + + switch (png_get_color_type(png_ptr, info_ptr)) + { + case PNG_COLOR_TYPE_GRAY: + printf("GRAY %u\n", component(row, x, 0, bit_depth, 1)); + return; + + /* The palette case is slightly more difficult - the palette and, if + * present, the tRNS ('transparency', though the values are really + * opacity) data must be read to give the full picture: + */ + case PNG_COLOR_TYPE_PALETTE: + { + int index = component(row, x, 0, bit_depth, 1); + png_colorp palette = NULL; + int num_palette = 0; + + if ((png_get_PLTE(png_ptr, info_ptr, &palette, &num_palette) & + PNG_INFO_PLTE) && num_palette > 0 && palette != NULL) + { + png_bytep trans_alpha = NULL; + int num_trans = 0; + if ((png_get_tRNS(png_ptr, info_ptr, &trans_alpha, &num_trans, + NULL) & PNG_INFO_tRNS) && num_trans > 0 && + trans_alpha != NULL) + printf("INDEXED %u = %d %d %d %d\n", index, + palette[index].red, palette[index].green, + palette[index].blue, + index < num_trans ? trans_alpha[index] : 255); + + else /* no transparency */ + printf("INDEXED %u = %d %d %d\n", index, + palette[index].red, palette[index].green, + palette[index].blue); + } + + else + printf("INDEXED %u = invalid index\n", index); + } + return; + + case PNG_COLOR_TYPE_RGB: + printf("RGB %u %u %u\n", component(row, x, 0, bit_depth, 3), + component(row, x, 1, bit_depth, 3), + component(row, x, 2, bit_depth, 3)); + return; + + case PNG_COLOR_TYPE_GRAY_ALPHA: + printf("GRAY+ALPHA %u %u\n", component(row, x, 0, bit_depth, 2), + component(row, x, 1, bit_depth, 2)); + return; + + case PNG_COLOR_TYPE_RGB_ALPHA: + printf("RGBA %u %u %u %u\n", component(row, x, 0, bit_depth, 4), + component(row, x, 1, bit_depth, 4), + component(row, x, 2, bit_depth, 4), + component(row, x, 3, bit_depth, 4)); + return; + + default: + png_error(png_ptr, "pngpixel: invalid color type"); + } +} + +int main(int argc, const char **argv) +{ + /* This program uses the default, based, libpng error handling + * mechanism, therefore any local variable that exists before the call to + * setjmp and is changed after the call to setjmp returns successfully must + * be declared with 'volatile' to ensure that their values don't get + * destroyed by longjmp: + */ + volatile int result = 1/*fail*/; + + if (argc == 4) + { + long x = atol(argv[1]); + long y = atol(argv[2]); + FILE *f = fopen(argv[3], "rb"); + volatile png_bytep row = NULL; + + if (f != NULL) + { + /* libpng requires a callback function for handling errors; this + * callback must not return. The default callback function uses a + * stored style jmp_buf which is held in a png_struct and + * writes error messages to stderr. Creating the png_struct is a + * little tricky; just copy the following code. + */ + png_structp png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, + NULL, NULL, NULL); + + if (png_ptr != NULL) + { + png_infop info_ptr = png_create_info_struct(png_ptr); + + if (info_ptr != NULL) + { + /* Declare stack variables to hold pointers to locally allocated + * data. + */ + + /* Initialize the error control buffer: */ + if (setjmp(png_jmpbuf(png_ptr)) == 0) + { + png_uint_32 width, height; + int bit_depth, color_type, interlace_method, + compression_method, filter_method; + png_bytep row_tmp; + + /* Now associate the recently opened (FILE*) with the default + * libpng initialization functions. Sometimes libpng is + * compiled without stdio support (it can be difficult to do + * in some environments); in that case you will have to write + * your own read callback to read data from the (FILE*). + */ + png_init_io(png_ptr, f); + + /* And read the first part of the PNG file - the header and + * all the information up to the first pixel. + */ + png_read_info(png_ptr, info_ptr); + + /* This fills in enough information to tell us the width of + * each row in bytes, allocate the appropriate amount of + * space. In this case png_malloc is used - it will not + * return if memory isn't available. + */ + row = png_malloc(png_ptr, png_get_rowbytes(png_ptr, + info_ptr)); + + /* To avoid the overhead of using a volatile auto copy row_tmp + * to a local here - just use row for the png_free below. + */ + row_tmp = row; + + /* All the information we need is in the header is returned by + * png_get_IHDR, if this fails we can now use 'png_error' to + * signal the error and return control to the setjmp above. + */ + if (png_get_IHDR(png_ptr, info_ptr, &width, &height, + &bit_depth, &color_type, &interlace_method, + &compression_method, &filter_method)) + { + int passes, pass; + + /* png_set_interlace_handling returns the number of + * passes required as well as turning on libpng's + * handling, but since we do it ourselves this is + * necessary: + */ + switch (interlace_method) + { + case PNG_INTERLACE_NONE: + passes = 1; + break; + + case PNG_INTERLACE_ADAM7: + passes = PNG_INTERLACE_ADAM7_PASSES; + break; + + default: + png_error(png_ptr, "pngpixel: unknown interlace"); + } + + /* Now read the pixels, pass-by-pass, row-by-row: */ + png_start_read_image(png_ptr); + + for (pass=0; pass +#include +#include +#include + +/* Normally use here to get the installed libpng, but this is done to + * ensure the code picks up the local libpng implementation: + */ +#include "../../png.h" +#if defined(PNG_SIMPLIFIED_READ_SUPPORTED) && \ + defined(PNG_SIMPLIFIED_WRITE_SUPPORTED) + +int main(int argc, const char **argv) +{ + int result = 1; + + if (argc == 3) + { + png_image image; + + /* Only the image structure version number needs to be set. */ + memset(&image, 0, sizeof image); + image.version = PNG_IMAGE_VERSION; + + if (png_image_begin_read_from_file(&image, argv[1])) + { + png_bytep buffer; + + /* Change this to try different formats! If you set a colormap format + * then you must also supply a colormap below. + */ + image.format = PNG_FORMAT_RGBA; + + buffer = malloc(PNG_IMAGE_SIZE(image)); + + if (buffer != NULL) + { + if (png_image_finish_read(&image, NULL/*background*/, buffer, + 0/*row_stride*/, NULL/*colormap for PNG_FORMAT_FLAG_COLORMAP */)) + { + if (png_image_write_to_file(&image, argv[2], + 0/*convert_to_8bit*/, buffer, 0/*row_stride*/, + NULL/*colormap*/)) + result = 0; + + else + fprintf(stderr, "pngtopng: write %s: %s\n", argv[2], + image.message); + } + + else + fprintf(stderr, "pngtopng: read %s: %s\n", argv[1], + image.message); + + free(buffer); + } + + else + { + fprintf(stderr, "pngtopng: out of memory: %lu bytes\n", + (unsigned long)PNG_IMAGE_SIZE(image)); + + /* This is the only place where a 'free' is required; libpng does + * the cleanup on error and success, but in this case we couldn't + * complete the read because of running out of memory and so libpng + * has not got to the point where it can do cleanup. + */ + png_image_free(&image); + } + } + + else + /* Failed to read the first argument: */ + fprintf(stderr, "pngtopng: %s: %s\n", argv[1], image.message); + } + + else + /* Wrong number of arguments */ + fprintf(stderr, "pngtopng: usage: pngtopng input-file output-file\n"); + + return result; +} +#endif /* READ && WRITE */ diff --git a/extern/libpng/contrib/examples/simpleover.c b/extern/libpng/contrib/examples/simpleover.c new file mode 100644 index 0000000000..59dd313688 --- /dev/null +++ b/extern/libpng/contrib/examples/simpleover.c @@ -0,0 +1,648 @@ +/*- simpleover + * + * COPYRIGHT: Written by John Cunningham Bowler, 2015. + * To the extent possible under law, the author has waived all copyright and + * related or neighboring rights to this work. This work is published from: + * United States. + * + * Read several PNG files, which should have an alpha channel or transparency + * information, and composite them together to produce one or more 16-bit linear + * RGBA intermediates. This involves doing the correct 'over' composition to + * combine the alpha channels and corresponding data. + * + * Finally read an output (background) PNG using the 24-bit RGB format (the + * PNG will be composited on green (#00ff00) by default if it has an alpha + * channel), and apply the intermediate image generated above to specified + * locations in the image. + * + * The command line has the general format: + * + * simpleover [output.png] + * {--sprite=width,height,name {[--at=x,y] {sprite.png}}} + * {--add=name {x,y}} + * + * The --sprite and --add options may occur multiple times. They are executed + * in order. --add may refer to any sprite already read. + * + * This code is intended to show how to composite multiple images together + * correctly. Apart from the libpng Simplified API the only work done in here + * is to combine multiple input PNG images into a single sprite; this involves + * a Porter-Duff 'over' operation and the input PNG images may, as a result, + * be regarded as being layered one on top of the other with the first (leftmost + * on the command line) being at the bottom and the last on the top. + */ +#include +#include +#include +#include +#include + +/* Normally use here to get the installed libpng, but this is done to + * ensure the code picks up the local libpng implementation, so long as this + * file is linked against a sufficiently recent libpng (1.6+) it is ok to + * change this to : + */ +#include "../../png.h" + +#ifdef PNG_SIMPLIFIED_READ_SUPPORTED + +#define sprite_name_chars 15 +struct sprite { + FILE *file; + png_uint_16p buffer; + unsigned int width; + unsigned int height; + char name[sprite_name_chars+1]; +}; + +#if 0 /* div by 65535 test program */ +#include +#include + +int main(void) { + double err = 0; + unsigned int xerr = 0; + unsigned int r = 32769; + { + unsigned int x = 0; + + do { + unsigned int t = x + (x >> 16) /*+ (x >> 31)*/ + r; + double v = x, errtest; + + if (t < x) { + fprintf(stderr, "overflow: %u+%u -> %u\n", x, r, t); + return 1; + } + + v /= 65535; + errtest = v; + t >>= 16; + errtest -= t; + + if (errtest > err) { + err = errtest; + xerr = x; + + if (errtest >= .5) { + fprintf(stderr, "error: %u/65535 = %f, not %u, error %f\n", + x, v, t, errtest); + return 0; + } + } + } while (++x <= 65535U*65535U); + } + + printf("error %f @ %u\n", err, xerr); + + return 0; +} +#endif /* div by 65535 test program */ + +static void +sprite_op(const struct sprite *sprite, int x_offset, int y_offset, + png_imagep image, const png_uint_16 *buffer) +{ + /* This is where the Porter-Duff 'Over' operator is evaluated; change this + * code to change the operator (this could be parameterized). Any other + * image processing operation could be used here. + */ + + + /* Check for an x or y offset that pushes any part of the image beyond the + * right or bottom of the sprite: + */ + if ((y_offset < 0 || (unsigned)/*SAFE*/y_offset < sprite->height) && + (x_offset < 0 || (unsigned)/*SAFE*/x_offset < sprite->width)) + { + unsigned int y = 0; + + if (y_offset < 0) + y = -y_offset; /* Skip to first visible row */ + + do + { + unsigned int x = 0; + + if (x_offset < 0) + x = -x_offset; + + do + { + /* In and out are RGBA values, so: */ + const png_uint_16 *in_pixel = buffer + (y * image->width + x)*4; + png_uint_32 in_alpha = in_pixel[3]; + + /* This is the optimized Porter-Duff 'Over' operation, when the + * input alpha is 0 the output is not changed. + */ + if (in_alpha > 0) + { + png_uint_16 *out_pixel = sprite->buffer + + ((y+y_offset) * sprite->width + (x+x_offset))*4; + + /* This is the weight to apply to the output: */ + in_alpha = 65535-in_alpha; + + if (in_alpha > 0) + { + /* The input must be composed onto the output. This means + * multiplying the current output pixel value by the inverse + * of the input alpha (1-alpha). A division is required but + * it is by the constant 65535. Approximate this as: + * + * (x + (x >> 16) + 32769) >> 16; + * + * This is exact (and does not overflow) for all values of + * x in the range 0..65535*65535. (Note that the calculation + * produces the closest integer; the maximum error is <0.5). + */ + png_uint_32 tmp; + +# define compose(c)\ + tmp = out_pixel[c] * in_alpha;\ + tmp = (tmp + (tmp >> 16) + 32769) >> 16;\ + out_pixel[c] = tmp + in_pixel[c] + + /* The following is very vectorizable... */ + compose(0); + compose(1); + compose(2); + compose(3); + } + + else + out_pixel[0] = in_pixel[0], + out_pixel[1] = in_pixel[1], + out_pixel[2] = in_pixel[2], + out_pixel[3] = in_pixel[3]; + } + } + while (++x < image->width); + } + while (++y < image->height); + } +} + +static int +create_sprite(struct sprite *sprite, int *argc, const char ***argv) +{ + /* Read the arguments and create this sprite. The sprite buffer has already + * been allocated. This reads the input PNGs one by one in linear format, + * composes them onto the sprite buffer (the code in the function above) + * then saves the result, converting it on the fly to PNG RGBA 8-bit format. + */ + while (*argc > 0) + { + char tombstone; + int x = 0, y = 0; + + if ((*argv)[0][0] == '-' && (*argv)[0][1] == '-') + { + /* The only supported option is --at. */ + if (sscanf((*argv)[0], "--at=%d,%d%c", &x, &y, &tombstone) != 2) + break; /* success; caller will parse this option */ + + ++*argv, --*argc; + } + + else + { + /* The argument has to be a file name */ + png_image image; + + image.version = PNG_IMAGE_VERSION; + image.opaque = NULL; + + if (png_image_begin_read_from_file(&image, (*argv)[0])) + { + png_uint_16p buffer; + + image.format = PNG_FORMAT_LINEAR_RGB_ALPHA; + + buffer = malloc(PNG_IMAGE_SIZE(image)); + + if (buffer != NULL) + { + if (png_image_finish_read(&image, NULL/*background*/, buffer, + 0/*row_stride*/, + NULL/*colormap for PNG_FORMAT_FLAG_COLORMAP*/)) + { + /* This is the place where the Porter-Duff 'Over' operator + * needs to be done by this code. In fact, any image + * processing required can be done here; the data is in + * the correct format (linear, 16-bit) and source and + * destination are in memory. + */ + sprite_op(sprite, x, y, &image, buffer); + free(buffer); + ++*argv, --*argc; + /* And continue to the next argument */ + continue; + } + + else + { + free(buffer); + fprintf(stderr, "simpleover: read %s: %s\n", (*argv)[0], + image.message); + } + } + + else + { + fprintf(stderr, "simpleover: out of memory: %lu bytes\n", + (unsigned long)PNG_IMAGE_SIZE(image)); + + /* png_image_free must be called if we abort the Simplified API + * read because of a problem detected in this code. If problems + * are detected in the Simplified API it cleans up itself. + */ + png_image_free(&image); + } + } + + else + { + /* Failed to read the first argument: */ + fprintf(stderr, "simpleover: %s: %s\n", (*argv)[0], image.message); + } + + return 0; /* failure */ + } + } + + /* All the sprite operations have completed successfully. Save the RGBA + * buffer as a PNG using the simplified write API. + */ + sprite->file = tmpfile(); + + if (sprite->file != NULL) + { + png_image save; + + memset(&save, 0, sizeof save); + save.version = PNG_IMAGE_VERSION; + save.opaque = NULL; + save.width = sprite->width; + save.height = sprite->height; + save.format = PNG_FORMAT_LINEAR_RGB_ALPHA; + save.flags = PNG_IMAGE_FLAG_FAST; + save.colormap_entries = 0; + + if (png_image_write_to_stdio(&save, sprite->file, 1/*convert_to_8_bit*/, + sprite->buffer, 0/*row_stride*/, NULL/*colormap*/)) + { + /* Success; the buffer is no longer needed: */ + free(sprite->buffer); + sprite->buffer = NULL; + return 1; /* ok */ + } + + else + fprintf(stderr, "simpleover: write sprite %s: %s\n", sprite->name, + save.message); + } + + else + fprintf(stderr, "simpleover: sprite %s: could not allocate tmpfile: %s\n", + sprite->name, strerror(errno)); + + return 0; /* fail */ +} + +static int +add_sprite(png_imagep output, png_bytep out_buf, struct sprite *sprite, + int *argc, const char ***argv) +{ + /* Given a --add argument naming this sprite, perform the operations listed + * in the following arguments. The arguments are expected to have the form + * (x,y), which is just an offset at which to add the sprite to the + * output. + */ + while (*argc > 0) + { + char tombstone; + int x, y; + + if ((*argv)[0][0] == '-' && (*argv)[0][1] == '-') + return 1; /* success */ + + if (sscanf((*argv)[0], "%d,%d%c", &x, &y, &tombstone) == 2) + { + /* Now add the new image into the sprite data, but only if it + * will fit. + */ + if (x < 0 || y < 0 || + (unsigned)/*SAFE*/x >= output->width || + (unsigned)/*SAFE*/y >= output->height || + sprite->width > output->width-x || + sprite->height > output->height-y) + { + fprintf(stderr, "simpleover: sprite %s @ (%d,%d) outside image\n", + sprite->name, x, y); + /* Could just skip this, but for the moment it is an error */ + return 0; /* error */ + } + + else + { + /* Since we know the sprite fits we can just read it into the + * output using the simplified API. + */ + png_image in; + + in.version = PNG_IMAGE_VERSION; + rewind(sprite->file); + + if (png_image_begin_read_from_stdio(&in, sprite->file)) + { + in.format = PNG_FORMAT_RGB; /* force compose */ + + if (png_image_finish_read(&in, NULL/*background*/, + out_buf + (y*output->width + x)*3/*RGB*/, + output->width*3/*row_stride*/, + NULL/*colormap for PNG_FORMAT_FLAG_COLORMAP*/)) + { + ++*argv, --*argc; + continue; + } + } + + /* The read failed: */ + fprintf(stderr, "simpleover: add sprite %s: %s\n", sprite->name, + in.message); + return 0; /* error */ + } + } + + else + { + fprintf(stderr, "simpleover: --add='%s': invalid position %s\n", + sprite->name, (*argv)[0]); + return 0; /* error */ + } + } + + return 1; /* ok */ +} + +static int +simpleover_process(png_imagep output, png_bytep out_buf, int argc, + const char **argv) +{ + int result = 1; /* success */ +# define csprites 10/*limit*/ +# define str(a) #a + int nsprites = 0; + struct sprite sprites[csprites]; + + while (argc > 0) + { + result = 0; /* fail */ + + if (strncmp(argv[0], "--sprite=", 9) == 0) + { + char tombstone; + + if (nsprites < csprites) + { + int n; + + sprites[nsprites].width = sprites[nsprites].height = 0; + sprites[nsprites].name[0] = 0; + + n = sscanf(argv[0], "--sprite=%u,%u,%" str(sprite_name_chars) "s%c", + &sprites[nsprites].width, &sprites[nsprites].height, + sprites[nsprites].name, &tombstone); + + if ((n == 2 || n == 3) && + sprites[nsprites].width > 0 && sprites[nsprites].height > 0) + { + size_t buf_size, tmp; + + /* Default a name if not given. */ + if (sprites[nsprites].name[0] == 0) + sprintf(sprites[nsprites].name, "sprite-%d", nsprites+1); + + /* Allocate a buffer for the sprite and calculate the buffer + * size: + */ + buf_size = sizeof (png_uint_16 [4]); + buf_size *= sprites[nsprites].width; + buf_size *= sprites[nsprites].height; + + /* This can overflow a (size_t); check for this: */ + tmp = buf_size; + tmp /= sprites[nsprites].width; + tmp /= sprites[nsprites].height; + + if (tmp == sizeof (png_uint_16 [4])) + { + sprites[nsprites].buffer = malloc(buf_size); + /* This buffer must be initialized to transparent: */ + memset(sprites[nsprites].buffer, 0, buf_size); + + if (sprites[nsprites].buffer != NULL) + { + sprites[nsprites].file = NULL; + ++argv, --argc; + + if (create_sprite(sprites+nsprites++, &argc, &argv)) + { + result = 1; /* still ok */ + continue; + } + + break; /* error */ + } + } + + /* Overflow, or OOM */ + fprintf(stderr, "simpleover: %s: sprite too large\n", argv[0]); + break; + } + + else + { + fprintf(stderr, "simpleover: %s: invalid sprite (%u,%u)\n", + argv[0], sprites[nsprites].width, sprites[nsprites].height); + break; + } + } + + else + { + fprintf(stderr, "simpleover: %s: too many sprites\n", argv[0]); + break; + } + } + + else if (strncmp(argv[0], "--add=", 6) == 0) + { + const char *name = argv[0]+6; + int isprite = nsprites; + + ++argv, --argc; + + while (--isprite >= 0) + { + if (strcmp(sprites[isprite].name, name) == 0) + { + if (!add_sprite(output, out_buf, sprites+isprite, &argc, &argv)) + goto out; /* error in add_sprite */ + + break; + } + } + + if (isprite < 0) /* sprite not found */ + { + fprintf(stderr, "simpleover: --add='%s': sprite not found\n", name); + break; + } + } + + else + { + fprintf(stderr, "simpleover: %s: unrecognized operation\n", argv[0]); + break; + } + + result = 1; /* ok */ + } + + /* Clean up the cache of sprites: */ +out: + while (--nsprites >= 0) + { + if (sprites[nsprites].buffer != NULL) + free(sprites[nsprites].buffer); + + if (sprites[nsprites].file != NULL) + (void)fclose(sprites[nsprites].file); + } + + return result; +} + +int main(int argc, const char **argv) +{ + int result = 1; /* default to fail */ + + if (argc >= 2) + { + int argi = 2; + const char *output = NULL; + png_image image; + + if (argc > 2 && argv[2][0] != '-'/*an operation*/) + { + output = argv[2]; + argi = 3; + } + + image.version = PNG_IMAGE_VERSION; + image.opaque = NULL; + + if (png_image_begin_read_from_file(&image, argv[1])) + { + png_bytep buffer; + + image.format = PNG_FORMAT_RGB; /* 24-bit RGB */ + + buffer = malloc(PNG_IMAGE_SIZE(image)); + + if (buffer != NULL) + { + png_color background = {0, 0xff, 0}; /* fully saturated green */ + + if (png_image_finish_read(&image, &background, buffer, + 0/*row_stride*/, NULL/*colormap for PNG_FORMAT_FLAG_COLORMAP */)) + { + /* At this point png_image_finish_read has cleaned up the + * allocated data in png_image, and only the buffer needs to be + * freed. + * + * Perform the remaining operations: + */ + if (simpleover_process(&image, buffer, argc-argi, argv+argi)) + { + /* Write the output: */ + if ((output != NULL && + png_image_write_to_file(&image, output, + 0/*convert_to_8bit*/, buffer, 0/*row_stride*/, + NULL/*colormap*/)) || + (output == NULL && + png_image_write_to_stdio(&image, stdout, + 0/*convert_to_8bit*/, buffer, 0/*row_stride*/, + NULL/*colormap*/))) + result = 0; + + else + fprintf(stderr, "simpleover: write %s: %s\n", + output == NULL ? "stdout" : output, image.message); + } + + /* else simpleover_process writes an error message */ + } + + else + fprintf(stderr, "simpleover: read %s: %s\n", argv[1], + image.message); + + free(buffer); + } + + else + { + fprintf(stderr, "simpleover: out of memory: %lu bytes\n", + (unsigned long)PNG_IMAGE_SIZE(image)); + + /* This is the only place where a 'free' is required; libpng does + * the cleanup on error and success, but in this case we couldn't + * complete the read because of running out of memory. + */ + png_image_free(&image); + } + } + + else + { + /* Failed to read the first argument: */ + fprintf(stderr, "simpleover: %s: %s\n", argv[1], image.message); + } + } + + else + { + /* Usage message */ + fprintf(stderr, + "simpleover: usage: simpleover background.png [output.png]\n" + " Output 'background.png' as a 24-bit RGB PNG file in 'output.png'\n" + " or, if not given, stdout. 'background.png' will be composited\n" + " on fully saturated green.\n" + "\n" + " Optionally, before output, process additional PNG files:\n" + "\n" + " --sprite=width,height,name {[--at=x,y] {sprite.png}}\n" + " Produce a transparent sprite of size (width,height) and with\n" + " name 'name'.\n" + " For each sprite.png composite it using a Porter-Duff 'Over'\n" + " operation at offset (x,y) in the sprite (defaulting to (0,0)).\n" + " Input PNGs will be truncated to the area of the sprite.\n" + "\n" + " --add='name' {x,y}\n" + " Optionally, before output, composite a sprite, 'name', which\n" + " must have been previously produced using --sprite, at each\n" + " offset (x,y) in the output image. Each sprite must fit\n" + " completely within the output image.\n" + "\n" + " PNG files are processed in the order they occur on the command\n" + " line and thus the first PNG processed appears as the bottommost\n" + " in the output image.\n"); + } + + return result; +} +#endif /* SIMPLIFIED_READ */ diff --git a/extern/libpng/include/contrib/gregbook/COPYING b/extern/libpng/contrib/gregbook/COPYING similarity index 100% rename from extern/libpng/include/contrib/gregbook/COPYING rename to extern/libpng/contrib/gregbook/COPYING diff --git a/extern/libpng/include/contrib/gregbook/LICENSE b/extern/libpng/contrib/gregbook/LICENSE similarity index 100% rename from extern/libpng/include/contrib/gregbook/LICENSE rename to extern/libpng/contrib/gregbook/LICENSE diff --git a/extern/libpng/include/contrib/gregbook/Makefile.mingw32 b/extern/libpng/contrib/gregbook/Makefile.mingw32 similarity index 96% rename from extern/libpng/include/contrib/gregbook/Makefile.mingw32 rename to extern/libpng/contrib/gregbook/Makefile.mingw32 index e70a59aef2..3a3ff607e8 100644 --- a/extern/libpng/include/contrib/gregbook/Makefile.mingw32 +++ b/extern/libpng/contrib/gregbook/Makefile.mingw32 @@ -47,7 +47,8 @@ CC = gcc #CC = i386-mingw32msvc-gcc # e.g., Linux -> Win32 cross-compilation LD = $(CC) RM = rm -f -CFLAGS = -O -Wall $(INCS) $(MINGW_CCFLAGS) +CPPFLAGS = $(INCS) +CFLAGS = -O -Wall $(MINGW_CCFLAGS) # [note that -Wall is a gcc-specific compilation flag ("most warnings on")] # [-ansi, -pedantic and -W can also be used] LDFLAGS = $(MINGW_LDFLAGS) @@ -85,10 +86,10 @@ EXES = $(STATIC_EXES) $(DYNAMIC_EXES) # implicit make rules ------------------------------------------------------- .c$(O): - $(CC) -c $(CFLAGS) $< + $(CC) -c $(CPPFLAGS) $(CFLAGS) $< %.pic$(O): %.c - $(CC) -c $(CFLAGS) -DPNG_BUILD_DLL -o $@ $< + $(CC) -c $(CPPFLAGS) $(CFLAGS) -DPNG_BUILD_DLL -o $@ $< # dependencies -------------------------------------------------------------- diff --git a/extern/libpng/include/contrib/gregbook/Makefile.sgi b/extern/libpng/contrib/gregbook/Makefile.sgi similarity index 92% rename from extern/libpng/include/contrib/gregbook/Makefile.sgi rename to extern/libpng/contrib/gregbook/Makefile.sgi index 91623acf06..94d61b4652 100644 --- a/extern/libpng/include/contrib/gregbook/Makefile.sgi +++ b/extern/libpng/contrib/gregbook/Makefile.sgi @@ -23,9 +23,9 @@ # macros -------------------------------------------------------------------- -PNGINC = -I/usr/local/include/libpng15 -PNGLIB = -L/usr/local/lib -lpng15 # dynamically linked against libpng -#PNGLIB = /usr/local/lib/libpng15.a # statically linked against libpng +PNGINC = -I/usr/local/include/libpng16 +PNGLIB = -L/usr/local/lib -lpng16 # dynamically linked against libpng +#PNGLIB = /usr/local/lib/libpng16.a # statically linked against libpng # or: #PNGINC = -I../.. #PNGLIB = -L../.. -lpng @@ -53,7 +53,8 @@ CC = cc LD = cc RM = rm -f # ABI must be the same as that used to build libpng. -ABI= +ABI = +CPPFLAGS = CFLAGS = $(ABI) -O -fullwarn $(INCS) LDFLAGS = $(ABI) O = .o @@ -73,7 +74,7 @@ EXES = $(RPNG)$(E) $(RPNG2)$(E) $(WPNG)$(E) # implicit make rules ------------------------------------------------------- .c$(O): - $(CC) -c $(CFLAGS) $< + $(CC) -c $(CPPFLAGS) $(CFLAGS) $< # dependencies -------------------------------------------------------------- diff --git a/extern/libpng/include/contrib/gregbook/Makefile.unx b/extern/libpng/contrib/gregbook/Makefile.unx similarity index 88% rename from extern/libpng/include/contrib/gregbook/Makefile.unx rename to extern/libpng/contrib/gregbook/Makefile.unx index b52d8b6aa6..1a73e03bff 100644 --- a/extern/libpng/include/contrib/gregbook/Makefile.unx +++ b/extern/libpng/contrib/gregbook/Makefile.unx @@ -26,14 +26,14 @@ # macros -------------------------------------------------------------------- #PNGDIR = /usr/local/lib -#PNGINC = -I/usr/local/include/libpng15 -#PNGLIBd = -L$(PNGDIR) -lpng15 # dynamically linked, installed libpng -#PNGLIBs = $(PNGDIR)/libpng15.a # statically linked, installed libpng +#PNGINC = -I/usr/local/include/libpng16 +#PNGLIBd = -L$(PNGDIR) -lpng16 # dynamically linked, installed libpng +#PNGLIBs = $(PNGDIR)/libpng16.a # statically linked, installed libpng # or: PNGDIR = ../..# this one is for libpng-x.y.z/contrib/gregbook builds #PNGDIR = ../libpng PNGINC = -I$(PNGDIR) -PNGLIBd = -Wl,-rpath,$(PNGDIR) -L$(PNGDIR) -lpng15 # dynamically linked +PNGLIBd = -Wl,-rpath,$(PNGDIR) -L$(PNGDIR) -lpng16 # dynamically linked PNGLIBs = $(PNGDIR)/libpng.a # statically linked, local libpng ZDIR = /usr/local/lib @@ -59,14 +59,16 @@ INCS = $(PNGINC) $(ZINC) $(XINC) RLIBSd = $(PNGLIBd) $(ZLIBd) $(XLIB) -lm RLIBSs = $(PNGLIBs) $(ZLIBs) $(XLIB) -lm WLIBSd = $(PNGLIBd) $(ZLIBd) -lm -WLIBSs = $(PNGLIBs) $(ZLIBs) +WLIBSs = $(PNGLIBs) $(ZLIBs) -lm CC = gcc LD = gcc RM = rm -f -CFLAGS = -O -Wall $(INCS) -DFEATURE_LOOP +CPPFLAGS = $(INCS) -DFEATURE_LOOP +CFLAGS = -O -Wall +#CFLAGS = -O -W -Wall -Wextra -pedantic -ansi # [note that -Wall is a gcc-specific compilation flag ("most warnings on")] -# [-ansi, -pedantic and -W can also be used] +# [-ansi, -pedantic, -Wextra, and -W can also be used] LDFLAGS = O = .o E = @@ -92,7 +94,7 @@ EXES = $(STATIC_EXES) $(DYNAMIC_EXES) # implicit make rules ------------------------------------------------------- .c$(O): - $(CC) -c $(CFLAGS) $< + $(CC) -c $(CPPFLAGS) $(CFLAGS) $< # dependencies -------------------------------------------------------------- diff --git a/extern/libpng/include/contrib/gregbook/Makefile.w32 b/extern/libpng/contrib/gregbook/Makefile.w32 similarity index 97% rename from extern/libpng/include/contrib/gregbook/Makefile.w32 rename to extern/libpng/contrib/gregbook/Makefile.w32 index 41cfb231a2..ab7dcf7cae 100644 --- a/extern/libpng/include/contrib/gregbook/Makefile.w32 +++ b/extern/libpng/contrib/gregbook/Makefile.w32 @@ -53,7 +53,8 @@ WLIBS = $(PNGLIB) $(ZLIB) CC = cl LD = link RM = del -CFLAGS = -nologo -O -W3 $(INCS) $(cvars) +CPPFLAGS = $(INCS) +CFLAGS = -nologo -O -W3 $(cvars) # [note that -W3 is an MSVC-specific compilation flag ("all warnings on")] # [see %devstudio%\vc\include\win32.mak for cvars macro definition] O = .obj @@ -76,7 +77,7 @@ EXES = $(RPNG)$(E) $(RPNG2)$(E) $(WPNG)$(E) # implicit make rules ------------------------------------------------------- .c$(O): - $(CC) -c $(CFLAGS) $< + $(CC) -c $(CPPFLAGS) $(CFLAGS) $< # dependencies -------------------------------------------------------------- diff --git a/extern/libpng/include/contrib/gregbook/README b/extern/libpng/contrib/gregbook/README similarity index 98% rename from extern/libpng/include/contrib/gregbook/README rename to extern/libpng/contrib/gregbook/README index 7b1f6a3ea6..90e28f7ce5 100644 --- a/extern/libpng/include/contrib/gregbook/README +++ b/extern/libpng/contrib/gregbook/README @@ -15,7 +15,7 @@ of PBMPLUS/NetPBM) and converts them to PNG. The source code for all three demo programs currently compiles under Unix, OpenVMS, and 32-bit Windows. (Special thanks to Martin Zinser, -zinser@decus.de, for making the necessary changes for OpenVMS and for +zinser at decus.de, for making the necessary changes for OpenVMS and for providing an appropriate build script.) Build instructions can be found below. @@ -55,7 +55,7 @@ mation and links to the latest version of the source code, and Chapters 13-15 of the book for detailed discussion of the three programs. Greg Roelofs -http://pobox.com/~newt/greg_contact.html +https://pobox.com/~newt/greg_contact.html 16 March 2008 @@ -63,7 +63,7 @@ BUILD INSTRUCTIONS - Prerequisites (in order of compilation): - - zlib http://zlib.net/ + - zlib https://zlib.net/ - libpng http://www.libpng.org/pub/png/libpng.html - pngbook http://www.libpng.org/pub/png/book/sources.html diff --git a/extern/libpng/include/contrib/gregbook/makevms.com b/extern/libpng/contrib/gregbook/makevms.com similarity index 100% rename from extern/libpng/include/contrib/gregbook/makevms.com rename to extern/libpng/contrib/gregbook/makevms.com diff --git a/extern/libpng/include/contrib/gregbook/readpng.c b/extern/libpng/contrib/gregbook/readpng.c similarity index 94% rename from extern/libpng/include/contrib/gregbook/readpng.c rename to extern/libpng/contrib/gregbook/readpng.c index df42c301b3..fad9b536ab 100644 --- a/extern/libpng/include/contrib/gregbook/readpng.c +++ b/extern/libpng/contrib/gregbook/readpng.c @@ -4,7 +4,7 @@ --------------------------------------------------------------------------- - Copyright (c) 1998-2007 Greg Roelofs. All rights reserved. + Copyright (c) 1998-2007,2017 Greg Roelofs. All rights reserved. This software is provided "as is," without warranty of any kind, express or implied. In no event shall the author or contributors @@ -55,8 +55,9 @@ #include #include +#include -#include "png.h" /* libpng header; includes zlib.h */ +#include "png.h" /* libpng header */ #include "readpng.h" /* typedefs, common macros, public prototypes */ /* future versions of libpng will provide this macro: */ @@ -99,7 +100,8 @@ int readpng_init(FILE *infile, ulg *pWidth, ulg *pHeight) /* could pass pointers to user-defined error handlers instead of NULLs: */ - png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); + png_ptr = png_create_read_struct(png_get_libpng_ver(NULL), NULL, NULL, + NULL); if (!png_ptr) return 4; /* out of memory */ @@ -214,6 +216,10 @@ uch *readpng_get_image(double display_exponent, int *pChannels, ulg *pRowbytes) * libpng function */ if (setjmp(png_jmpbuf(png_ptr))) { + free(image_data); + image_data = NULL; + free(row_pointers); + row_pointers = NULL; png_destroy_read_struct(&png_ptr, &info_ptr, NULL); return NULL; } @@ -258,6 +264,12 @@ uch *readpng_get_image(double display_exponent, int *pChannels, ulg *pRowbytes) *pRowbytes = rowbytes = png_get_rowbytes(png_ptr, info_ptr); *pChannels = (int)png_get_channels(png_ptr, info_ptr); + /* Guard against integer overflow */ + if (height > ((size_t)(-1))/rowbytes) { + fprintf(stderr, "readpng: image_data buffer would be too large\n", + return NULL; + } + if ((image_data = (uch *)malloc(rowbytes*height)) == NULL) { png_destroy_read_struct(&png_ptr, &info_ptr, NULL); return NULL; diff --git a/extern/libpng/include/contrib/gregbook/readpng.h b/extern/libpng/contrib/gregbook/readpng.h similarity index 100% rename from extern/libpng/include/contrib/gregbook/readpng.h rename to extern/libpng/contrib/gregbook/readpng.h diff --git a/extern/libpng/include/contrib/gregbook/readpng2.c b/extern/libpng/contrib/gregbook/readpng2.c similarity index 84% rename from extern/libpng/include/contrib/gregbook/readpng2.c rename to extern/libpng/contrib/gregbook/readpng2.c index b9746b7560..610b3cd87e 100644 --- a/extern/libpng/include/contrib/gregbook/readpng2.c +++ b/extern/libpng/contrib/gregbook/readpng2.c @@ -4,7 +4,7 @@ --------------------------------------------------------------------------- - Copyright (c) 1998-2007 Greg Roelofs. All rights reserved. + Copyright (c) 1998-2015 Greg Roelofs. All rights reserved. This software is provided "as is," without warranty of any kind, express or implied. In no event shall the author or contributors @@ -51,6 +51,12 @@ along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + --------------------------------------------------------------------------- + + Changelog: + 2015-11-12 - Check return value of png_get_bKGD() (Glenn R-P) + 2017-04-22 - Guard against integer overflow (Glenn R-P) + ---------------------------------------------------------------------------*/ @@ -69,6 +75,7 @@ static void readpng2_row_callback(png_structp png_ptr, png_bytep new_row, png_uint_32 row_num, int pass); static void readpng2_end_callback(png_structp png_ptr, png_infop info_ptr); static void readpng2_error_handler(png_structp png_ptr, png_const_charp msg); +static void readpng2_warning_handler(png_structp png_ptr, png_const_charp msg); @@ -103,8 +110,8 @@ int readpng2_init(mainprog_info *mainprog_ptr) /* could also replace libpng warning-handler (final NULL), but no need: */ - png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, mainprog_ptr, - readpng2_error_handler, NULL); + png_ptr = png_create_read_struct(png_get_libpng_ver(NULL), mainprog_ptr, + readpng2_error_handler, readpng2_warning_handler); if (!png_ptr) return 4; /* out of memory */ @@ -136,29 +143,23 @@ int readpng2_init(mainprog_info *mainprog_ptr) * used, i.e., all chunks recognized by libpng except for IHDR, PLTE, IDAT, * IEND, tRNS, bKGD, gAMA, and sRGB (small performance improvement) */ { - /* These byte strings were copied from png.h. If a future libpng - * version recognizes more chunks, add them to this list. If a - * future version of readpng2.c recognizes more chunks, delete them - * from this list. */ - static /* const */ png_byte chunks_to_ignore[] = { - 99, 72, 82, 77, '\0', /* cHRM */ - 104, 73, 83, 84, '\0', /* hIST */ - 105, 67, 67, 80, '\0', /* iCCP */ - 105, 84, 88, 116, '\0', /* iTXt */ - 111, 70, 70, 115, '\0', /* oFFs */ - 112, 67, 65, 76, '\0', /* pCAL */ - 112, 72, 89, 115, '\0', /* pHYs */ - 115, 66, 73, 84, '\0', /* sBIT */ - 115, 67, 65, 76, '\0', /* sCAL */ - 115, 80, 76, 84, '\0', /* sPLT */ - 115, 84, 69, 82, '\0', /* sTER */ - 116, 69, 88, 116, '\0', /* tEXt */ - 116, 73, 77, 69, '\0', /* tIME */ - 122, 84, 88, 116, '\0' /* zTXt */ - }; + /* These byte strings were copied from png.h. If a future version + * of readpng2.c recognizes more chunks, add them to this list. + */ + static const png_byte chunks_to_process[] = { + 98, 75, 71, 68, '\0', /* bKGD */ + 103, 65, 77, 65, '\0', /* gAMA */ + 115, 82, 71, 66, '\0', /* sRGB */ + }; - png_set_keep_unknown_chunks(png_ptr, 1 /* PNG_HANDLE_CHUNK_NEVER */, - chunks_to_ignore, sizeof(chunks_to_ignore)/5); + /* Ignore all chunks except for IHDR, PLTE, tRNS, IDAT, and IEND */ + png_set_keep_unknown_chunks(png_ptr, -1 /* PNG_HANDLE_CHUNK_NEVER */, + NULL, -1); + + /* But do not ignore chunks in the "chunks_to_process" list */ + png_set_keep_unknown_chunks(png_ptr, + 0 /* PNG_HANDLE_CHUNK_AS_DEFAULT */, chunks_to_process, + sizeof(chunks_to_process)/5); } #endif /* PNG_HANDLE_AS_UNKNOWN_SUPPORTED */ @@ -266,36 +267,38 @@ static void readpng2_info_callback(png_structp png_ptr, png_infop info_ptr) /* since we know we've read all of the PNG file's "header" (i.e., up * to IDAT), we can check for a background color here */ - if (mainprog_ptr->need_bgcolor && - png_get_valid(png_ptr, info_ptr, PNG_INFO_bKGD)) + if (mainprog_ptr->need_bgcolor) { png_color_16p pBackground; /* it is not obvious from the libpng documentation, but this function * takes a pointer to a pointer, and it always returns valid red, * green and blue values, regardless of color_type: */ - png_get_bKGD(png_ptr, info_ptr, &pBackground); + if (png_get_bKGD(png_ptr, info_ptr, &pBackground)) + { - /* however, it always returns the raw bKGD data, regardless of any - * bit-depth transformations, so check depth and adjust if necessary */ - if (bit_depth == 16) { - mainprog_ptr->bg_red = pBackground->red >> 8; - mainprog_ptr->bg_green = pBackground->green >> 8; - mainprog_ptr->bg_blue = pBackground->blue >> 8; - } else if (color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8) { - if (bit_depth == 1) - mainprog_ptr->bg_red = mainprog_ptr->bg_green = - mainprog_ptr->bg_blue = pBackground->gray? 255 : 0; - else if (bit_depth == 2) - mainprog_ptr->bg_red = mainprog_ptr->bg_green = - mainprog_ptr->bg_blue = (255/3) * pBackground->gray; - else /* bit_depth == 4 */ - mainprog_ptr->bg_red = mainprog_ptr->bg_green = - mainprog_ptr->bg_blue = (255/15) * pBackground->gray; - } else { - mainprog_ptr->bg_red = (uch)pBackground->red; - mainprog_ptr->bg_green = (uch)pBackground->green; - mainprog_ptr->bg_blue = (uch)pBackground->blue; + /* however, it always returns the raw bKGD data, regardless of any + * bit-depth transformations, so check depth and adjust if necessary + */ + if (bit_depth == 16) { + mainprog_ptr->bg_red = pBackground->red >> 8; + mainprog_ptr->bg_green = pBackground->green >> 8; + mainprog_ptr->bg_blue = pBackground->blue >> 8; + } else if (color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8) { + if (bit_depth == 1) + mainprog_ptr->bg_red = mainprog_ptr->bg_green = + mainprog_ptr->bg_blue = pBackground->gray? 255 : 0; + else if (bit_depth == 2) + mainprog_ptr->bg_red = mainprog_ptr->bg_green = + mainprog_ptr->bg_blue = (255/3) * pBackground->gray; + else /* bit_depth == 4 */ + mainprog_ptr->bg_red = mainprog_ptr->bg_green = + mainprog_ptr->bg_blue = (255/15) * pBackground->gray; + } else { + mainprog_ptr->bg_red = (uch)pBackground->red; + mainprog_ptr->bg_green = (uch)pBackground->green; + mainprog_ptr->bg_blue = (uch)pBackground->blue; + } } } @@ -453,6 +456,8 @@ static void readpng2_end_callback(png_structp png_ptr, png_infop info_ptr) /* all done */ + (void)info_ptr; /* Unused */ + return; } @@ -473,7 +478,12 @@ void readpng2_cleanup(mainprog_info *mainprog_ptr) } - +static void readpng2_warning_handler(png_structp png_ptr, png_const_charp msg) +{ + fprintf(stderr, "readpng2 libpng warning: %s\n", msg); + fflush(stderr); + (void)png_ptr; /* Unused */ +} static void readpng2_error_handler(png_structp png_ptr, png_const_charp msg) diff --git a/extern/libpng/include/contrib/gregbook/readpng2.h b/extern/libpng/contrib/gregbook/readpng2.h similarity index 100% rename from extern/libpng/include/contrib/gregbook/readpng2.h rename to extern/libpng/contrib/gregbook/readpng2.h diff --git a/extern/libpng/include/contrib/gregbook/readppm.c b/extern/libpng/contrib/gregbook/readppm.c similarity index 92% rename from extern/libpng/include/contrib/gregbook/readppm.c rename to extern/libpng/contrib/gregbook/readppm.c index be9a56d95f..52e7027771 100644 --- a/extern/libpng/include/contrib/gregbook/readppm.c +++ b/extern/libpng/contrib/gregbook/readppm.c @@ -9,7 +9,7 @@ --------------------------------------------------------------------------- - Copyright (c) 1998-2007 Greg Roelofs. All rights reserved. + Copyright (c) 1998-2007,2017 Greg Roelofs. All rights reserved. This software is provided "as is," without warranty of any kind, express or implied. In no event shall the author or contributors @@ -154,17 +154,26 @@ uch *readpng_get_image(double display_exponent, int *pChannels, ulg *pRowbytes) *pRowbytes = rowbytes = channels*width; *pChannels = channels; + Trace((stderr, "readpng_get_image: rowbytes = %ld, height = %ld\n", rowbytes, height)); + + /* Guard against integer overflow */ + if (height > ((size_t)(-1))/rowbytes) { + fprintf(stderr, PROGNAME ": image_data buffer would be too large\n", + return NULL; + } + if ((image_data = (uch *)malloc(rowbytes*height)) == NULL) { return NULL; } - Trace((stderr, "readpng_get_image: rowbytes = %ld, height = %ld\n", rowbytes, height)); - - /* now we can go ahead and just read the whole image */ - fread(image_data, 1L, rowbytes*height, saved_infile); - + if (fread(image_data, 1L, rowbytes*height, saved_infile) < + rowbytes*height) { + free (image_data); + image_data = NULL; + return NULL; + } return image_data; } diff --git a/extern/libpng/include/contrib/gregbook/rpng-win.c b/extern/libpng/contrib/gregbook/rpng-win.c similarity index 98% rename from extern/libpng/include/contrib/gregbook/rpng-win.c rename to extern/libpng/contrib/gregbook/rpng-win.c index f53ddc8ece..1a6f876154 100644 --- a/extern/libpng/include/contrib/gregbook/rpng-win.c +++ b/extern/libpng/contrib/gregbook/rpng-win.c @@ -24,10 +24,11 @@ - 1.10: enabled "message window"/console (thanks to David Geldreich) - 2.00: dual-licensed (added GNU GPL) - 2.01: fixed improper display of usage screen on PNG error(s) + - 2.02: check for integer overflow (Glenn R-P) --------------------------------------------------------------------------- - Copyright (c) 1998-2008 Greg Roelofs. All rights reserved. + Copyright (c) 1998-2008, 2017 Greg Roelofs. All rights reserved. This software is provided "as is," without warranty of any kind, express or implied. In no event shall the author or contributors @@ -182,7 +183,7 @@ int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, PSTR cmd, int showmode) #ifndef __CYGWIN__ /* First reenable console output, which normally goes to the bit bucket * for windowed apps. Closing the console window will terminate the - * app. Thanks to David.Geldreich@realviz.com for supplying the magical + * app. Thanks to David.Geldreich at realviz.com for supplying the magical * incantation. */ AllocConsole(); @@ -496,6 +497,12 @@ static int rpng_win_create_window(HINSTANCE hInst, int showmode) wimage_rowbytes = ((3*image_width + 3L) >> 2) << 2; + /* Guard against integer overflow */ + if (image_height > ((size_t)(-1))/wimage_rowbytes) { + fprintf(stderr, PROGNAME ": image_data buffer would be too large\n"); + return 4; /* fail */ + } + if (!(dib = (uch *)malloc(sizeof(BITMAPINFOHEADER) + wimage_rowbytes*image_height))) { diff --git a/extern/libpng/include/contrib/gregbook/rpng-x.c b/extern/libpng/contrib/gregbook/rpng-x.c similarity index 98% rename from extern/libpng/include/contrib/gregbook/rpng-x.c rename to extern/libpng/contrib/gregbook/rpng-x.c index 6d10e1b84e..92effaa6d2 100644 --- a/extern/libpng/include/contrib/gregbook/rpng-x.c +++ b/extern/libpng/contrib/gregbook/rpng-x.c @@ -26,10 +26,13 @@ - 1.14: added support for X resources (thanks to Gerhard Niklasch) - 2.00: dual-licensed (added GNU GPL) - 2.01: fixed improper display of usage screen on PNG error(s) + - 2.02: Added "void(argc);" statement to quiet pedantic compiler warnings + about unused variable (GR-P) + - 2.03: check for integer overflow (Glenn R-P) --------------------------------------------------------------------------- - Copyright (c) 1998-2008 Greg Roelofs. All rights reserved. + Copyright (c) 1998-2008, 2017 Greg Roelofs. All rights reserved. This software is provided "as is," without warranty of any kind, express or implied. In no event shall the author or contributors @@ -80,7 +83,7 @@ #define PROGNAME "rpng-x" #define LONGNAME "Simple PNG Viewer for X" -#define VERSION "2.01 of 16 March 2008" +#define VERSION "2.02 of 15 June 2014" #define RESNAME "rpng" /* our X resource application name */ #define RESCLASS "Rpng" /* our X resource class name */ @@ -279,15 +282,17 @@ int main(int argc, char **argv) "Usage: %s [-display xdpy] [-gamma exp] [-bgcolor bg] file.png\n" " xdpy\tname of the target X display (e.g., ``hostname:0'')\n" " exp \ttransfer-function exponent (``gamma'') of the display\n" - "\t\t system in floating-point format (e.g., ``%.1f''); equal\n" + "\t\t system in floating-point format (e.g., ``%.1f''); equal\n", + PROGNAME, default_display_exponent); + + fprintf(stderr, "\n" "\t\t to the product of the lookup-table exponent (varies)\n" "\t\t and the CRT exponent (usually 2.2); must be positive\n" " bg \tdesired background color in 7-character hex RGB format\n" "\t\t (e.g., ``#ff7700'' for orange: same as HTML colors);\n" "\t\t used with transparent images\n" "\nPress Q, Esc or mouse button 1 (within image window, after image\n" - "is displayed) to quit.\n" - "\n", PROGNAME, default_display_exponent); + "is displayed) to quit.\n"); exit(1); } @@ -419,6 +424,8 @@ int main(int argc, char **argv) rpng_x_cleanup(); + (void)argc; /* Unused */ + return 0; } diff --git a/extern/libpng/include/contrib/gregbook/rpng2-win.c b/extern/libpng/contrib/gregbook/rpng2-win.c similarity index 99% rename from extern/libpng/include/contrib/gregbook/rpng2-win.c rename to extern/libpng/contrib/gregbook/rpng2-win.c index 223e737409..ed6b526ecb 100644 --- a/extern/libpng/include/contrib/gregbook/rpng2-win.c +++ b/extern/libpng/contrib/gregbook/rpng2-win.c @@ -33,10 +33,11 @@ - 2.02: fixed improper display of usage screen on PNG error(s); fixed unexpected-EOF and file-read-error cases - 2.03: removed runtime MMX-enabling/disabling and obsolete -mmx* options + - 2.04: check for integer overflow (Glenn R-P) --------------------------------------------------------------------------- - Copyright (c) 1998-2008 Greg Roelofs. All rights reserved. + Copyright (c) 1998-2008, 2017 Greg Roelofs. All rights reserved. This software is provided "as is," without warranty of any kind, express or implied. In no event shall the author or contributors @@ -299,7 +300,7 @@ int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, PSTR cmd, int showmode) #ifndef __CYGWIN__ /* Next reenable console output, which normally goes to the bit bucket * for windowed apps. Closing the console window will terminate the - * app. Thanks to David.Geldreich@realviz.com for supplying the magical + * app. Thanks to David.Geldreich at realviz.com for supplying the magical * incantation. */ AllocConsole(); @@ -648,6 +649,13 @@ static void rpng2_win_init() Trace((stderr, " width = %ld\n", rpng2_info.width)) Trace((stderr, " height = %ld\n", rpng2_info.height)) + /* Guard against integer overflow */ + if (rpng2_info.height > ((size_t)(-1))/rowbytes) { + fprintf(stderr, PROGNAME ": image_data buffer would be too large\n", + readpng2_cleanup(&rpng2_info); + return; + } + rpng2_info.image_data = (uch *)malloc(rowbytes * rpng2_info.height); if (!rpng2_info.image_data) { readpng2_cleanup(&rpng2_info); diff --git a/extern/libpng/include/contrib/gregbook/rpng2-x.c b/extern/libpng/contrib/gregbook/rpng2-x.c similarity index 98% rename from extern/libpng/include/contrib/gregbook/rpng2-x.c rename to extern/libpng/contrib/gregbook/rpng2-x.c index 7f24b632be..af944c0f2b 100644 --- a/extern/libpng/include/contrib/gregbook/rpng2-x.c +++ b/extern/libpng/contrib/gregbook/rpng2-x.c @@ -41,10 +41,14 @@ unexpected-EOF and file-read-error cases; fixed Trace() cut-and- paste bugs - 2.03: deleted runtime MMX-enabling/disabling and obsolete -mmx* options - + - 2.04: Added "void(foo);" statements to quiet pedantic compiler warnings + about unused variables (GR-P) + - 2.05: Use nanosleep() instead of usleep(), which is deprecated (GR-P). + - 2.06: check for integer overflow (Glenn R-P) --------------------------------------------------------------------------- - Copyright (c) 1998-2008 Greg Roelofs. All rights reserved. + Copyright (c) 1998-2010, 2014-2015, 2017 Greg Roelofs. All rights + reserved. This software is provided "as is," without warranty of any kind, express or implied. In no event shall the author or contributors @@ -95,7 +99,7 @@ #define PROGNAME "rpng2-x" #define LONGNAME "Progressive PNG Viewer for X" -#define VERSION "2.03 of 25 February 2010" +#define VERSION "2.04 of 15 June 2014" #define RESNAME "rpng2" /* our X resource application name */ #define RESCLASS "Rpng" /* our X resource class name */ @@ -111,6 +115,19 @@ #include #include /* defines XK_* macros */ +#if _POSIX_C_SOURCE >= 199309L /* have nanosleep() */ +# undef usleep +# define usleep(usec) { \ + struct timespec ts; \ + ts.tv_sec = 0; \ + ts.tv_nsec = (usec) * 1000; \ + nanosleep(&ts, NULL); } +# endif + +#ifndef usleep /* have neither nanosleep() nor usleep() */ +# define usleep(x) sleep(((x)+499999)/1000000) +#endif + #ifdef VMS # include #endif @@ -456,40 +473,47 @@ int main(int argc, char **argv) fprintf(stderr, "\n%s %s: %s\n\n", PROGNAME, VERSION, appname); readpng2_version_info(); fprintf(stderr, "\n" - "Usage: %s [-display xdpy] [-gamma exp] [-bgcolor bg | -bgpat pat]\n" + "Usage: "); + fprintf(stderr, + "%s [-display xdpy] [-gamma exp] [-bgcolor bg | -bgpat pat]\n" + " %*s [-usleep dur | -timing] [-pause]\n", + PROGNAME, (int)strlen(PROGNAME), " "); + fprintf(stderr, #ifdef FEATURE_LOOP - " %*s [-usleep dur | -timing] [-pause] [-loop [sec]] file.png\n\n" -#else - " %*s [-usleep dur | -timing] [-pause] file.png\n\n" + " [-loop [sec]]" #endif + " file.png\n\n"); + fprintf(stderr, " xdpy\tname of the target X display (e.g., ``hostname:0'')\n" " exp \ttransfer-function exponent (``gamma'') of the display\n" "\t\t system in floating-point format (e.g., ``%.1f''); equal\n" - "\t\t to the product of the lookup-table exponent (varies)\n" + "\t\t to the product of the lookup-table exponent (varies)\n", + default_display_exponent); + fprintf(stderr, "\t\t and the CRT exponent (usually 2.2); must be positive\n" " bg \tdesired background color in 7-character hex RGB format\n" "\t\t (e.g., ``#ff7700'' for orange: same as HTML colors);\n" "\t\t used with transparent images; overrides -bgpat\n" " pat \tdesired background pattern number (0-%d); used with\n" - "\t\t transparent images; overrides -bgcolor\n" + "\t\t transparent images; overrides -bgcolor\n", + num_bgpat-1); #ifdef FEATURE_LOOP + fprintf(stderr, " -loop\tloops through background images after initial display\n" "\t\t is complete (depends on -bgpat)\n" - " sec \tseconds to display each background image (default = 2)\n" + " sec \tseconds to display each background image (default = 2)\n"); #endif + fprintf(stderr, " dur \tduration in microseconds to wait after displaying each\n" "\t\t row (for demo purposes)\n" " -timing\tenables delay for every block read, to simulate modem\n" "\t\t download of image (~36 Kbps)\n" " -pause\tpauses after displaying each pass until mouse clicked\n" "\nPress Q, Esc or mouse button 1 (within image window, after image\n" - "is displayed) to quit.\n" - "\n", PROGNAME, - (int)strlen(PROGNAME), " ", default_display_exponent, num_bgpat-1); + "is displayed) to quit.\n"); exit(1); } - if (!(infile = fopen(filename, "rb"))) { fprintf(stderr, PROGNAME ": can't open PNG file [%s]\n", filename); ++error; @@ -735,6 +759,8 @@ int main(int argc, char **argv) Trace((stderr, "about to call rpng2_x_cleanup()\n")) rpng2_x_cleanup(); + (void)argc; /* Unused */ + return 0; } @@ -756,6 +782,13 @@ static void rpng2_x_init(void) Trace((stderr, " width = %ld\n", rpng2_info.width)) Trace((stderr, " height = %ld\n", rpng2_info.height)) + /* Guard against integer overflow */ + if (rpng2_info.height > ((size_t)(-1))/rpng2_info.rowbytes) { + fprintf(stderr, PROGNAME ": image_data buffer would be too large\n"); + readpng2_cleanup(&rpng2_info); + return; + } + rpng2_info.image_data = (uch *)malloc(rowbytes * rpng2_info.height); if (!rpng2_info.image_data) { readpng2_cleanup(&rpng2_info); @@ -1826,6 +1859,9 @@ static void rpng2_x_redisplay_image(ulg startcol, ulg startrow, XFlush(display); } + (void)startcol; + (void)width; + } /* end function rpng2_x_redisplay_image() */ diff --git a/extern/libpng/include/contrib/gregbook/toucan.png b/extern/libpng/contrib/gregbook/toucan.png similarity index 100% rename from extern/libpng/include/contrib/gregbook/toucan.png rename to extern/libpng/contrib/gregbook/toucan.png diff --git a/extern/libpng/include/contrib/gregbook/wpng.c b/extern/libpng/contrib/gregbook/wpng.c similarity index 98% rename from extern/libpng/include/contrib/gregbook/wpng.c rename to extern/libpng/contrib/gregbook/wpng.c index a06e3529ec..a8f367fb84 100644 --- a/extern/libpng/include/contrib/gregbook/wpng.c +++ b/extern/libpng/contrib/gregbook/wpng.c @@ -29,6 +29,7 @@ - 1.04: fixed DOS/OS2/Win32 detection, including partial Cygwin fix (see http://home.att.net/~perlspinr/diffs/GregBook_cygwin.diff) - 2.00: dual-licensed (added GNU GPL) + - 2.01: check for integer overflow (Glenn R-P) [REPORTED BUG (win32 only): "contrib/gregbook/wpng.c - cmd line dose not work! In order to do something useful I needed to redirect @@ -38,7 +39,7 @@ --------------------------------------------------------------------------- - Copyright (c) 1998-2007 Greg Roelofs. All rights reserved. + Copyright (c) 1998-2007, 2017 Greg Roelofs. All rights reserved. This software is provided "as is," without warranty of any kind, express or implied. In no event shall the author or contributors @@ -702,7 +703,18 @@ int main(int argc, char **argv) if (wpng_info.interlaced) { long i; ulg bytes; - ulg image_bytes = rowbytes * wpng_info.height; /* overflow? */ + ulg image_bytes; + + /* Guard against integer overflow */ + if (wpng_info_height > ((size_t)(-1)/rowbytes || + wpng_info_height > ((ulg)(-1)/rowbytes) { + fprintf(stderr, PROGNAME ": image_data buffer too large\n"); + writepng_cleanup(&wpng_info); + wpng_cleanup(); + exit(5); + } + + image_bytes = rowbytes * wpng_info.height; wpng_info.image_data = (uch *)malloc(image_bytes); wpng_info.row_pointers = (uch **)malloc(wpng_info.height*sizeof(uch *)); diff --git a/extern/libpng/include/contrib/gregbook/writepng.c b/extern/libpng/contrib/gregbook/writepng.c similarity index 98% rename from extern/libpng/include/contrib/gregbook/writepng.c rename to extern/libpng/contrib/gregbook/writepng.c index f07f4a8a02..055c74374a 100644 --- a/extern/libpng/include/contrib/gregbook/writepng.c +++ b/extern/libpng/contrib/gregbook/writepng.c @@ -4,7 +4,7 @@ --------------------------------------------------------------------------- - Copyright (c) 1998-2007 Greg Roelofs. All rights reserved. + Copyright (c) 1998-2007, 2017 Greg Roelofs. All rights reserved. This software is provided "as is," without warranty of any kind, express or implied. In no event shall the author or contributors @@ -55,8 +55,9 @@ #include /* for exit() prototype */ +#include -#include "png.h" /* libpng header; includes zlib.h and setjmp.h */ +#include "png.h" /* libpng header, includes setjmp.h */ #include "writepng.h" /* typedefs, common macros, public prototypes */ @@ -89,7 +90,7 @@ int writepng_init(mainprog_info *mainprog_ptr) /* could also replace libpng warning-handler (final NULL), but no need: */ - png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, mainprog_ptr, + png_ptr = png_create_write_struct(png_get_libpng_ver(NULL), mainprog_ptr, writepng_error_handler, NULL); if (!png_ptr) return 4; /* out of memory */ diff --git a/extern/libpng/include/contrib/gregbook/writepng.h b/extern/libpng/contrib/gregbook/writepng.h similarity index 100% rename from extern/libpng/include/contrib/gregbook/writepng.h rename to extern/libpng/contrib/gregbook/writepng.h diff --git a/extern/libpng/contrib/libtests/fakepng.c b/extern/libpng/contrib/libtests/fakepng.c new file mode 100644 index 0000000000..6512c14010 --- /dev/null +++ b/extern/libpng/contrib/libtests/fakepng.c @@ -0,0 +1,65 @@ +/* Fake a PNG - just write it out directly. + * + * COPYRIGHT: Written by John Cunningham Bowler, 2014. + * To the extent possible under law, the author has waived all copyright and + * related or neighboring rights to this work. This work is published from: + * United States. + * + */ + +#include +#include /* for crc32 */ + +void +put_uLong(uLong val) +{ + putchar(val >> 24); + putchar(val >> 16); + putchar(val >> 8); + putchar(val >> 0); +} + +void +put_chunk(const unsigned char *chunk, uInt length) +{ + uLong crc; + + put_uLong(length-4); /* Exclude the tag */ + + fwrite(chunk, length, 1, stdout); + + crc = crc32(0, Z_NULL, 0); + put_uLong(crc32(crc, chunk, length)); +} + +const unsigned char signature[] = +{ + 137, 80, 78, 71, 13, 10, 26, 10 +}; + +const unsigned char IHDR[] = +{ + 73, 72, 68, 82, /* IHDR */ + 0, 0, 0, 1, /* width */ + 0, 0, 0, 1, /* height */ + 1, /* bit depth */ + 0, /* color type: greyscale */ + 0, /* compression method */ + 0, /* filter method */ + 0 /* interlace method: none */ +}; + +const unsigned char unknown[] = +{ + 'u', 'n', 'K', 'n' /* "unKn" - private safe to copy */ +}; + +int +main(void) +{ + fwrite(signature, sizeof signature, 1, stdout); + put_chunk(IHDR, sizeof IHDR); + + for (;;) + put_chunk(unknown, sizeof unknown); +} diff --git a/extern/libpng/contrib/libtests/gentests.sh b/extern/libpng/contrib/libtests/gentests.sh new file mode 100755 index 0000000000..f0f8d2395a --- /dev/null +++ b/extern/libpng/contrib/libtests/gentests.sh @@ -0,0 +1,102 @@ +#!/bin/sh +# +# Copyright (c) 2013 John Cunningham Bowler +# +# Last changed in libpng 1.6.0 [February 14, 2013] +# +# This code is released under the libpng license. +# For conditions of distribution and use, see the disclaimer +# and license in png.h +# +# Generate a set of PNG test images. The images are generated in a +# sub-directory called 'tests' by default, however a command line argument will +# change that name. The generation requires a built version of makepng in the +# current directory. +# +usage(){ + exec >&2 + echo "$0 []" + echo ' Generate a set of PNG test files in "directory" ("tests" by default)' + exit 1 +} + +mp="$PWD/makepng" +test -x "$mp" || { + exec >&2 + echo "$0: the 'makepng' program must exist" + echo " in the directory within which this program:" + echo " $mp" + echo " is executed" + usage +} + +# Just one argument: the directory +testdir="tests" +test $# -gt 1 && { + testdir="$1" + shift +} +test $# -eq 0 || usage + +# Take care not to clobber something +if test -e "$testdir" +then + test -d "$testdir" || usage +else + # mkdir -p isn't portable, so do the following + mkdir "$testdir" 2>/dev/null || mkdir -p "$testdir" || usage +fi + +# This fails in a very satisfactory way if it's not accessible +cd "$testdir" +:>"test$$.png" || { + exec >&2 + echo "$testdir: directory not writable" + usage +} +rm "test$$.png" || { + exec >&2 + echo "$testdir: you have create but not write privileges here." + echo " This is unexpected. You have a spurion; "'"'"test$$.png"'"'"." + echo " You need to remove this yourself. Try a different directory." + exit 1 +} + +# Now call makepng ($mp) to create every file we can think of with a +# reasonable name +doit(){ + for gamma in "" --sRGB --linear --1.8 + do + case "$gamma" in + "") + gname=;; + --sRGB) + gname="-srgb";; + --linear) + gname="-lin";; + --1.8) + gname="-18";; + *) + gname="-$gamma";; + esac + "$mp" $gamma "$1" "$2" "test-$1-$2$gname.png" + done +} +# +for ct in gray palette +do + for bd in 1 2 4 8 + do + doit "$ct" "$bd" + done +done +# +doit "gray" "16" +# +for ct in gray-alpha rgb rgb-alpha +do + for bd in 8 16 + do + doit "$ct" "$bd" + done +done diff --git a/extern/libpng/contrib/libtests/makepng.c b/extern/libpng/contrib/libtests/makepng.c new file mode 100644 index 0000000000..312062bda7 --- /dev/null +++ b/extern/libpng/contrib/libtests/makepng.c @@ -0,0 +1,1941 @@ +/* makepng.c */ +#define _ISOC99_SOURCE +/* Copyright: */ +#define COPYRIGHT "\251 2013,2015 John Cunningham Bowler" +/* + * Last changed in libpng 1.6.20 [November 24, 2015] + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + * + * Make a test PNG image. The arguments are as follows: + * + * makepng [--sRGB|--linear|--1.8] [--tRNS] [--nofilters] \ + * color-type bit-depth [file-name] + * + * The color-type may be numeric (and must match the numbers used by the PNG + * specification) or one of the format names listed below. The bit-depth is the + * component bit depth, or the pixel bit-depth for a color-mapped image. + * + * Without any options no color-space information is written, with the options + * an sRGB or the appropriate gAMA chunk is written. "1.8" refers to the + * display system used on older Apple computers to correct for high ambient + * light levels in the viewing environment; it applies a transform of + * approximately value^(1/1.45) to the color values and so a gAMA chunk of 65909 + * is written (1.45/2.2). + * + * The image data is generated internally. Unless --color is given the images + * used are as follows: + * + * 1 channel: a square image with a diamond, the least luminous colors are on + * the edge of the image, the most luminous in the center. + * + * 2 channels: the color channel increases in luminosity from top to bottom, the + * alpha channel increases in opacity from left to right. + * + * 3 channels: linear combinations of, from the top-left corner clockwise, + * black, green, white, red. + * + * 4 channels: linear combinations of, from the top-left corner clockwise, + * transparent, red, green, blue. + * + * For color-mapped images a four channel color-map is used and if --tRNS is + * given the PNG file has a tRNS chunk, as follows: + * + * 1-bit: entry 0 is transparent-red, entry 1 is opaque-white + * 2-bit: entry 0: transparent-green + * entry 1: 40%-red + * entry 2: 80%-blue + * entry 3: opaque-white + * 4-bit: the 16 combinations of the 2-bit case + * 8-bit: the 256 combinations of the 4-bit case + * + * The palette always has 2^bit-depth entries and the tRNS chunk one fewer. The + * image is the 1-channel diamond, but using palette index, not luminosity. + * + * For formats other than color-mapped ones if --tRNS is specified a tRNS chunk + * is generated with all channels equal to the low bits of 0x0101. + * + * Image size is determined by the final pixel depth in bits, i.e. channels x + * bit-depth, as follows: + * + * 8 bits or less: 64x64 + * 16 bits: 256x256 + * More than 16 bits: 1024x1024 + * + * Row filtering is the libpng default but may be turned off (the 'none' filter + * is used on every row) with the --nofilters option. + * + * The images are not interlaced. + * + * If file-name is given then the PNG is written to that file, else it is + * written to stdout. Notice that stdout is not supported on systems where, by + * default, it assumes text output; this program makes no attempt to change the + * text mode of stdout! + * + * makepng --color= ... + * + * If --color is given then the whole image has that color, color-mapped images + * will have exactly one palette entry and all image files with be 16x16 in + * size. The color value is 1 to 4 decimal numbers as appropriate for the color + * type. + * + * makepng --small ... + * + * If --small is given the images are no larger than required to include every + * possible pixel value for the format. + * + * For formats with pixels 8 bits or fewer in size the images consist of a + * single row with 2^pixel-depth pixels, one of every possible value. + * + * For formats with 16-bit pixels a 256x256 image is generated containing every + * possible pixel value. + * + * For larger pixel sizes a 256x256 image is generated where the first row + * consists of each pixel that has identical byte values throughout the pixel + * followed by rows where the byte values differ within the pixel. + * + * In all cases the pixel values are arranged in such a way that the SUB and UP + * filters give byte sequences for maximal zlib compression. By default (if + * --nofilters is not given) the SUB filter is used on the first row and the UP + * filter on all following rows. + * + * The --small option is meant to provide good test-case coverage, however the + * images are not easy to examine visually. Without the --small option the + * images contain identical color values; the pixel values are adjusted + * according to the gamma encoding with no gamma encoding being interpreted as + * sRGB. + * + * LICENSING + * ========= + * + * This code is copyright of the authors, see the COPYRIGHT define above. The + * code is licensed as above, using the libpng license. The code generates + * images which are solely the product of the code; the options choose which of + * the many possibilities to generate. The images that result (but not the code + * which generates them) are licensed as defined here: + * + * IMPORTANT: the COPYRIGHT #define must contain ISO-Latin-1 characters, the + * IMAGE_LICENSING #define must contain UTF-8 characters. The 'copyright' + * symbol 0xA9U (\251) in ISO-Latin-1 encoding and 0xC20xA9 (\302\251) in UTF-8. + */ +#define IMAGE_LICENSING "Dedicated to the public domain per Creative Commons "\ + "license \"CC0 1.0\"; https://creativecommons.org/publicdomain/zero/1.0/" + +#include /* for offsetof */ +#include +#include +#include +#include +#include +#include +#include +#include + +#if defined(HAVE_CONFIG_H) && !defined(PNG_NO_CONFIG_H) +# include +#endif + +/* Define the following to use this test against your installed libpng, rather + * than the one being built here: + */ +#ifdef PNG_FREESTANDING_TESTS +# include +#else +# include "../../png.h" +#endif + +#include + +/* Work round for GCC complaints about casting a (double) function result to + * an unsigned: + */ +static unsigned int +flooru(double d) +{ + d = floor(d); + return (unsigned int)d; +} + +static png_byte +floorb(double d) +{ + d = floor(d); + return (png_byte)d; +} + +/* This structure is used for inserting extra chunks (the --insert argument, not + * documented above.) + */ +typedef struct chunk_insert +{ + struct chunk_insert *next; + void (*insert)(png_structp, png_infop, int, png_charpp); + int nparams; + png_charp parameters[1]; +} chunk_insert; + +static unsigned int +channels_of_type(int color_type) +{ + if (color_type & PNG_COLOR_MASK_PALETTE) + return 1; + + else + { + int channels = 1; + + if (color_type & PNG_COLOR_MASK_COLOR) + channels = 3; + + if (color_type & PNG_COLOR_MASK_ALPHA) + return channels + 1; + + else + return channels; + } +} + +static unsigned int +pixel_depth_of_type(int color_type, int bit_depth) +{ + return channels_of_type(color_type) * bit_depth; +} + +static unsigned int +image_size_of_type(int color_type, int bit_depth, unsigned int *colors, + int small) +{ + if (*colors) + return 16; + + else + { + int pixel_depth = pixel_depth_of_type(color_type, bit_depth); + + if (small) + { + if (pixel_depth <= 8) /* there will be one row */ + return 1 << pixel_depth; + + else + return 256; + } + + else if (pixel_depth < 8) + return 64; + + else if (pixel_depth > 16) + return 1024; + + else + return 256; + } +} + +static void +set_color(png_colorp color, png_bytep trans, unsigned int red, + unsigned int green, unsigned int blue, unsigned int alpha, + png_const_bytep gamma_table) +{ + color->red = gamma_table[red]; + color->green = gamma_table[green]; + color->blue = gamma_table[blue]; + *trans = (png_byte)alpha; +} + +static int +generate_palette(png_colorp palette, png_bytep trans, int bit_depth, + png_const_bytep gamma_table, unsigned int *colors) +{ + /* + * 1-bit: entry 0 is transparent-red, entry 1 is opaque-white + * 2-bit: entry 0: transparent-green + * entry 1: 40%-red + * entry 2: 80%-blue + * entry 3: opaque-white + * 4-bit: the 16 combinations of the 2-bit case + * 8-bit: the 256 combinations of the 4-bit case + */ + switch (colors[0]) + { + default: + fprintf(stderr, "makepng: --colors=...: invalid count %u\n", + colors[0]); + exit(1); + + case 1: + set_color(palette+0, trans+0, colors[1], colors[1], colors[1], 255, + gamma_table); + return 1; + + case 2: + set_color(palette+0, trans+0, colors[1], colors[1], colors[1], + colors[2], gamma_table); + return 1; + + case 3: + set_color(palette+0, trans+0, colors[1], colors[2], colors[3], 255, + gamma_table); + return 1; + + case 4: + set_color(palette+0, trans+0, colors[1], colors[2], colors[3], + colors[4], gamma_table); + return 1; + + case 0: + if (bit_depth == 1) + { + set_color(palette+0, trans+0, 255, 0, 0, 0, gamma_table); + set_color(palette+1, trans+1, 255, 255, 255, 255, gamma_table); + return 2; + } + + else + { + unsigned int size = 1U << (bit_depth/2); /* 2, 4 or 16 */ + unsigned int x, y; + volatile unsigned int ip = 0; + + for (x=0; x> 3; + + if (offset < rowbytes && (bit_depth < 16 || offset+1 < rowbytes)) + { + row += offset; + + switch (bit_depth) + { + case 1: + case 2: + case 4: + /* Don't gamma correct - values get smashed */ + { + unsigned int shift = (8 - bit_depth) - (x & 0x7U); + + mask <<= shift; + value = (value << shift) & mask; + *row = (png_byte)((*row & ~mask) | value); + } + return; + + default: + fprintf(stderr, "makepng: bad bit depth (internal error)\n"); + exit(1); + + case 16: + value = flooru(65535*pow(value/65535.,conv)+.5); + *row++ = (png_byte)(value >> 8); + *row = (png_byte)value; + return; + + case 8: + *row = gamma_table[value]; + return; + } + } + + else + { + fprintf(stderr, "makepng: row buffer overflow (internal error)\n"); + exit(1); + } + } + + else + { + fprintf(stderr, "makepng: component overflow (internal error)\n"); + exit(1); + } +} + +static int /* filter mask for row */ +generate_row(png_bytep row, size_t rowbytes, unsigned int y, int color_type, + int bit_depth, png_const_bytep gamma_table, double conv, + unsigned int *colors, int small) +{ + int filters = 0; /* file *MASK*, 0 means the default, not NONE */ + png_uint_32 size_max = + image_size_of_type(color_type, bit_depth, colors, small)-1; + png_uint_32 depth_max = (1U << bit_depth)-1; /* up to 65536 */ + + if (colors[0] == 0) if (small) + { + unsigned int pixel_depth = pixel_depth_of_type(color_type, bit_depth); + + /* For pixel depths less than 16 generate a single row containing all the + * possible pixel values. For 16 generate all 65536 byte pair + * combinations in a 256x256 pixel array. + */ + switch (pixel_depth) + { + case 1: + assert(y == 0 && rowbytes == 1 && size_max == 1); + row[0] = 0x6CU; /* binary: 01101100, only top 2 bits used */ + filters = PNG_FILTER_NONE; + break; + + case 2: + assert(y == 0 && rowbytes == 1 && size_max == 3); + row[0] = 0x1BU; /* binary 00011011, all bits used */ + filters = PNG_FILTER_NONE; + break; + + case 4: + assert(y == 0 && rowbytes == 8 && size_max == 15); + row[0] = 0x01U; + row[1] = 0x23U; /* SUB gives 0x22U for all following bytes */ + row[2] = 0x45U; + row[3] = 0x67U; + row[4] = 0x89U; + row[5] = 0xABU; + row[6] = 0xCDU; + row[7] = 0xEFU; + filters = PNG_FILTER_SUB; + break; + + case 8: + /* The row will have all the pixel values in order starting with + * '1', the SUB filter will change every byte into '1' (including + * the last, which generates pixel value '0'). Since the SUB filter + * has value 1 this should result in maximum compression. + */ + assert(y == 0 && rowbytes == 256 && size_max == 255); + for (;;) + { + row[size_max] = 0xFFU & (size_max+1); + if (size_max == 0) + break; + --size_max; + } + filters = PNG_FILTER_SUB; + break; + + case 16: + /* Rows are generated such that each row has a constant difference + * between the first and second byte of each pixel and so that the + * difference increases by 1 at each row. The rows start with the + * first byte value of 0 and the value increases to 255 across the + * row. + * + * The difference starts at 1, so the first row is: + * + * 0 1 1 2 2 3 3 4 ... 254 255 255 0 + * + * This means that running the SUB filter on the first row produces: + * + * [SUB==1] 0 1 0 1 0 1... + * + * Then the difference is 2 on the next row, giving: + * + * 0 2 1 3 2 4 3 5 ... 254 0 255 1 + * + * When the UP filter is run on this libpng produces: + * + * [UP ==2] 0 1 0 1 0 1... + * + * And so on for all the remain rows to the final two * rows: + * + * row 254: 0 255 1 0 2 1 3 2 4 3 ... 254 253 255 254 + * row 255: 0 0 1 1 2 2 3 3 4 4 ... 254 254 255 255 + */ + assert(rowbytes == 512 && size_max == 255); + for (;;) + { + row[2*size_max ] = 0xFFU & size_max; + row[2*size_max+1] = 0xFFU & (size_max+y+1); + if (size_max == 0) + break; + --size_max; + } + /* The first row must include PNG_FILTER_UP so that libpng knows we + * need to keep it for the following row: + */ + filters = (y == 0 ? PNG_FILTER_SUB+PNG_FILTER_UP : PNG_FILTER_UP); + break; + + case 24: + case 32: + case 48: + case 64: + /* The rows are filled by an alogorithm similar to the above, in the + * first row pixel bytes are all equal, increasing from 0 by 1 for + * each pixel. In the second row the bytes within a pixel are + * incremented 1,3,5,7,... from the previous row byte. Using an odd + * number ensures all the possible byte values are used. + */ + assert(size_max == 255 && rowbytes == 256*(pixel_depth>>3)); + pixel_depth >>= 3; /* now in bytes */ + while (rowbytes > 0) + { + const size_t pixel_index = --rowbytes/pixel_depth; + + if (y == 0) + row[rowbytes] = 0xFFU & pixel_index; + + else + { + const size_t byte_offset = + rowbytes - pixel_index * pixel_depth; + + row[rowbytes] = + 0xFFU & (pixel_index + (byte_offset * 2*y) + 1); + } + } + filters = (y == 0 ? PNG_FILTER_SUB+PNG_FILTER_UP : PNG_FILTER_UP); + break; + + default: + assert(0/*NOT REACHED*/); + } + } + + else switch (channels_of_type(color_type)) + { + /* 1 channel: a square image with a diamond, the least luminous colors are on + * the edge of the image, the most luminous in the center. + */ + case 1: + { + png_uint_32 x; + png_uint_32 base = 2*size_max - abs(2*y-size_max); + + for (x=0; x<=size_max; ++x) + { + png_uint_32 luma = base - abs(2*x-size_max); + + /* 'luma' is now in the range 0..2*size_max, we need + * 0..depth_max + */ + luma = (luma*depth_max + size_max) / (2*size_max); + set_value(row, rowbytes, x, bit_depth, luma, gamma_table, conv); + } + } + break; + + /* 2 channels: the color channel increases in luminosity from top to bottom, + * the alpha channel increases in opacity from left to right. + */ + case 2: + { + png_uint_32 alpha = (depth_max * y * 2 + size_max) / (2 * size_max); + png_uint_32 x; + + for (x=0; x<=size_max; ++x) + { + set_value(row, rowbytes, 2*x, bit_depth, + (depth_max * x * 2 + size_max) / (2 * size_max), gamma_table, + conv); + set_value(row, rowbytes, 2*x+1, bit_depth, alpha, gamma_table, + conv); + } + } + break; + + /* 3 channels: linear combinations of, from the top-left corner clockwise, + * black, green, white, red. + */ + case 3: + { + /* x0: the black->red scale (the value of the red component) at the + * start of the row (blue and green are 0). + * x1: the green->white scale (the value of the red and blue + * components at the end of the row; green is depth_max). + */ + png_uint_32 Y = (depth_max * y * 2 + size_max) / (2 * size_max); + png_uint_32 x; + + /* Interpolate x/depth_max from start to end: + * + * start end difference + * red: Y Y 0 + * green: 0 depth_max depth_max + * blue: 0 Y Y + */ + for (x=0; x<=size_max; ++x) + { + set_value(row, rowbytes, 3*x+0, bit_depth, /* red */ Y, + gamma_table, conv); + set_value(row, rowbytes, 3*x+1, bit_depth, /* green */ + (depth_max * x * 2 + size_max) / (2 * size_max), + gamma_table, conv); + set_value(row, rowbytes, 3*x+2, bit_depth, /* blue */ + (Y * x * 2 + size_max) / (2 * size_max), + gamma_table, conv); + } + } + break; + + /* 4 channels: linear combinations of, from the top-left corner clockwise, + * transparent, red, green, blue. + */ + case 4: + { + /* x0: the transparent->blue scale (the value of the blue and alpha + * components) at the start of the row (red and green are 0). + * x1: the red->green scale (the value of the red and green + * components at the end of the row; blue is 0 and alpha is + * depth_max). + */ + png_uint_32 Y = (depth_max * y * 2 + size_max) / (2 * size_max); + png_uint_32 x; + + /* Interpolate x/depth_max from start to end: + * + * start end difference + * red: 0 depth_max-Y depth_max-Y + * green: 0 Y Y + * blue: Y 0 -Y + * alpha: Y depth_max depth_max-Y + */ + for (x=0; x<=size_max; ++x) + { + set_value(row, rowbytes, 4*x+0, bit_depth, /* red */ + ((depth_max-Y) * x * 2 + size_max) / (2 * size_max), + gamma_table, conv); + set_value(row, rowbytes, 4*x+1, bit_depth, /* green */ + (Y * x * 2 + size_max) / (2 * size_max), + gamma_table, conv); + set_value(row, rowbytes, 4*x+2, bit_depth, /* blue */ + Y - (Y * x * 2 + size_max) / (2 * size_max), + gamma_table, conv); + set_value(row, rowbytes, 4*x+3, bit_depth, /* alpha */ + Y + ((depth_max-Y) * x * 2 + size_max) / (2 * size_max), + gamma_table, conv); + } + } + break; + + default: + fprintf(stderr, "makepng: internal bad channel count\n"); + exit(2); + } + + else if (color_type & PNG_COLOR_MASK_PALETTE) + { + /* Palette with fixed color: the image rows are all 0 and the image width + * is 16. + */ + memset(row, 0, rowbytes); + } + + else if (colors[0] == channels_of_type(color_type)) + switch (channels_of_type(color_type)) + { + case 1: + { + png_uint_32 luma = colors[1]; + png_uint_32 x; + + for (x=0; x<=size_max; ++x) + set_value(row, rowbytes, x, bit_depth, luma, gamma_table, + conv); + } + break; + + case 2: + { + png_uint_32 luma = colors[1]; + png_uint_32 alpha = colors[2]; + png_uint_32 x; + + for (x=0; x 0 && gamma < 1000) + gamma = PNG_FP_1; + + if (gamma > 0) + real_gamma = gamma; + + { + unsigned int i; + + if (real_gamma == 45455) for (i=0; i<256; ++i) + { + gamma_table[i] = (png_byte)i; + conv = 1.; + } + + else + { + /* Convert 'i' from sRGB (45455) to real_gamma, this makes + * the images look the same regardless of the gAMA chunk. + */ + conv = real_gamma; + conv /= 45455; + + gamma_table[0] = 0; + + for (i=1; i<255; ++i) + gamma_table[i] = floorb(pow(i/255.,conv) * 255 + .5); + + gamma_table[255] = 255; + } + } + + png_set_IHDR(png_ptr, info_ptr, size, ysize, bit_depth, color_type, + PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE); + + if (color_type & PNG_COLOR_MASK_PALETTE) + { + int npalette; + png_color palette[256]; + png_byte trans[256]; + + npalette = generate_palette(palette, trans, bit_depth, gamma_table, + colors); + png_set_PLTE(png_ptr, info_ptr, palette, npalette); + + if (tRNS) + png_set_tRNS(png_ptr, info_ptr, trans, npalette-1, + NULL/*transparent color*/); + + /* Reset gamma_table to prevent the image rows being changed */ + for (npalette=0; npalette<256; ++npalette) + gamma_table[npalette] = (png_byte)npalette; + } + + else if (tRNS) + { + png_color_16 col; + + col.red = col.green = col.blue = col.gray = + 0x0101U & ((1U< 0) /* Else don't set color space information */ + { + png_set_gAMA_fixed(png_ptr, info_ptr, real_gamma); + + /* Just use the sRGB values here. */ + png_set_cHRM_fixed(png_ptr, info_ptr, + /* color x y */ + /* white */ 31270, 32900, + /* red */ 64000, 33000, + /* green */ 30000, 60000, + /* blue */ 15000, 6000 + ); + } + + /* Insert extra information. */ + while (insert != NULL) + { + insert->insert(png_ptr, info_ptr, insert->nparams, insert->parameters); + insert = insert->next; + } + + /* Write the file header. */ + png_write_info(png_ptr, info_ptr); + + /* Restrict the filters */ + png_set_filter(png_ptr, PNG_FILTER_TYPE_BASE, filters); + + { +# ifdef PNG_WRITE_INTERLACING_SUPPORTED + int passes = png_set_interlace_handling(png_ptr); +# else /* !WRITE_INTERLACING */ + int passes = 1; +# endif /* !WRITE_INTERLACING */ + int pass; + size_t rowbytes = png_get_rowbytes(png_ptr, info_ptr); + + row = malloc(rowbytes); + + if (row == NULL) + png_error(png_ptr, "OOM allocating row buffer"); + + for (pass = 0; pass < passes; ++pass) + { + unsigned int y; + + for (y=0; y 0) + { + /* Round up to a multiple of 4 here to allow an iCCP profile + * to be padded to a 4x boundary. + */ + png_bytep data = malloc((total+3)&~3); + + if (data != NULL) + { + size_t new_size = 0; + + for (;;) + { + ch = getc(fp); + if (ch == EOF) break; + data[new_size++] = (png_byte)ch; + } + + if (ferror(fp) || new_size != total) + { + perror("temporary file"); + fprintf(stderr, "temporary file read error\n"); + free(data); + } + + else + { + (void)fclose(fp); + *result = data; + return total; + } + } + + else + fprintf(stderr, "%s: out of memory loading file\n", name); + } + + else + fprintf(stderr, "%s: empty file\n", name); + } + } + } + + else + { + perror(name); + fprintf(stderr, "%s: open failed\n", name); + } + + fclose(fp); + } + + else + fprintf(stderr, "makepng: %s: could not open temporary file\n", name); + + exit(1); + return 0; +} + +static size_t +load_fake(png_charp param, png_bytepp profile) +{ + char *endptr = NULL; + uint64_t size = strtoull(param, &endptr, 0/*base*/); + + /* The 'fake' format is *[string] */ + if (endptr != NULL && *endptr == '*') + { + size_t len = strlen(++endptr); + size_t result = (size_t)size; + + if (len == 0) len = 1; /* capture the terminating '\0' */ + + /* Now repeat that string to fill 'size' bytes. */ + if (result == size && (*profile = malloc(result)) != NULL) + { + png_bytep out = *profile; + + if (len == 1) + memset(out, *endptr, result); + + else + { + while (size >= len) + { + memcpy(out, endptr, len); + out += len; + size -= len; + } + memcpy(out, endptr, size); + } + + return result; + } + + else + { + fprintf(stderr, "%s: size exceeds system limits\n", param); + exit(1); + } + } + + return 0; +} + +static void +check_param_count(int nparams, int expect) +{ + if (nparams != expect) + { + fprintf(stderr, "bad parameter count (internal error)\n"); + exit(1); + } +} + +static void +insert_iCCP(png_structp png_ptr, png_infop info_ptr, int nparams, + png_charpp params) +{ + png_bytep profile = NULL; + png_uint_32 proflen = 0; + int result; + + check_param_count(nparams, 2); + + switch (params[1][0]) + { + case '<': + { + size_t filelen = load_file(params[1]+1, &profile); + if (filelen > 0xfffffffc) /* Maximum profile length */ + { + fprintf(stderr, "%s: file too long (%lu) for an ICC profile\n", + params[1]+1, (unsigned long)filelen); + exit(1); + } + + proflen = (png_uint_32)filelen; + } + break; + + case '0': case '1': case '2': case '3': case '4': + case '5': case '6': case '7': case '8': case '9': + { + size_t fake_len = load_fake(params[1], &profile); + + if (fake_len > 0) /* else a simple parameter */ + { + if (fake_len > 0xffffffff) /* Maximum profile length */ + { + fprintf(stderr, + "%s: fake data too long (%lu) for an ICC profile\n", + params[1], (unsigned long)fake_len); + exit(1); + } + proflen = (png_uint_32)(fake_len & ~3U); + /* Always fix up the profile length. */ + png_save_uint_32(profile, proflen); + break; + } + } + + default: + fprintf(stderr, "--insert iCCP \"%s\": unrecognized\n", params[1]); + fprintf(stderr, " use '<' to read a file: \" 3) + { + png_uint_32 prof_header = png_get_uint_32(profile); + + if (prof_header != proflen) + { + fprintf(stderr, "--insert iCCP %s: profile length field wrong:\n", + params[1]); + fprintf(stderr, " actual %lu, recorded value %lu (corrected)\n", + (unsigned long)proflen, (unsigned long)prof_header); + png_save_uint_32(profile, proflen); + } + } + + if (result && profile != NULL && proflen >=4) + png_set_iCCP(png_ptr, info_ptr, params[0], PNG_COMPRESSION_TYPE_BASE, + profile, proflen); + + if (profile) + free(profile); + + if (!result) + exit(1); +} + +static void +clear_text(png_text *text, png_charp keyword) +{ + text->compression = -1; /* none */ + text->key = keyword; + text->text = NULL; + text->text_length = 0; /* libpng calculates this */ + text->itxt_length = 0; /* libpng calculates this */ + text->lang = NULL; + text->lang_key = NULL; +} + +static void +set_text(png_structp png_ptr, png_infop info_ptr, png_textp text, + png_charp param) +{ + switch (param[0]) + { + case '<': + { + png_bytep file = NULL; + + text->text_length = load_file(param+1, &file); + text->text = (png_charp)file; + } + break; + + case '0': case '1': case '2': case '3': case '4': + case '5': case '6': case '7': case '8': case '9': + { + png_bytep data = NULL; + size_t fake_len = load_fake(param, &data); + + if (fake_len > 0) /* else a simple parameter */ + { + text->text_length = fake_len; + text->text = (png_charp)data; + break; + } + } + + default: + text->text = param; + break; + } + + png_set_text(png_ptr, info_ptr, text, 1); + + if (text->text != param) + free(text->text); +} + +static void +insert_tEXt(png_structp png_ptr, png_infop info_ptr, int nparams, + png_charpp params) +{ + png_text text; + + check_param_count(nparams, 2); + clear_text(&text, params[0]); + set_text(png_ptr, info_ptr, &text, params[1]); +} + +static void +insert_zTXt(png_structp png_ptr, png_infop info_ptr, int nparams, + png_charpp params) +{ + png_text text; + + check_param_count(nparams, 2); + clear_text(&text, params[0]); + text.compression = 0; /* deflate */ + set_text(png_ptr, info_ptr, &text, params[1]); +} + +static void +insert_iTXt(png_structp png_ptr, png_infop info_ptr, int nparams, + png_charpp params) +{ + png_text text; + + check_param_count(nparams, 4); + clear_text(&text, params[0]); + text.compression = 2; /* iTXt + deflate */ + text.lang = params[1];/* language tag */ + text.lang_key = params[2]; /* translated keyword */ + set_text(png_ptr, info_ptr, &text, params[3]); +} + +static void +insert_hIST(png_structp png_ptr, png_infop info_ptr, int nparams, + png_charpp params) +{ + int i; + png_uint_16 freq[256]; + + /* libpng takes the count from the PLTE count; we don't check it here but we + * do set the array to 0 for unspecified entries. + */ + memset(freq, 0, sizeof freq); + for (i=0; inext = NULL; + cip->insert = insert; + cip->nparams = nparams; + for (i=0; iparameters[i] = list[i]; + + return cip; +} + +static chunk_insert * +find_insert(png_const_charp what, png_charp param) +{ + png_uint_32 chunk = 0; + png_charp parameter_list[1024]; + int i, nparams; + + /* Assemble the chunk name */ + for (i=0; i<4; ++i) + { + char ch = what[i]; + + if ((ch >= 65 && ch <= 90) || (ch >= 97 && ch <= 122)) + chunk = (chunk << 8) + what[i]; + + else + break; + } + + if (i < 4 || what[4] != 0) + { + fprintf(stderr, "makepng --insert \"%s\": invalid chunk name\n", what); + exit(1); + } + + /* Assemble the parameter list. */ + nparams = find_parameters(what, param, parameter_list, 1024); + +# define CHUNK(a,b,c,d) (((a)<<24)+((b)<<16)+((c)<<8)+(d)) + + switch (chunk) + { + case CHUNK(105,67,67,80): /* iCCP */ + if (nparams == 2) + return make_insert(what, insert_iCCP, nparams, parameter_list); + break; + + case CHUNK(116,69,88,116): /* tEXt */ + if (nparams == 2) + return make_insert(what, insert_tEXt, nparams, parameter_list); + break; + + case CHUNK(122,84,88,116): /* zTXt */ + if (nparams == 2) + return make_insert(what, insert_zTXt, nparams, parameter_list); + break; + + case CHUNK(105,84,88,116): /* iTXt */ + if (nparams == 4) + return make_insert(what, insert_iTXt, nparams, parameter_list); + break; + + case CHUNK(104,73,83,84): /* hIST */ + if (nparams <= 256) + return make_insert(what, insert_hIST, nparams, parameter_list); + break; + + case CHUNK(115,66,73,84): /* sBIT */ + if (nparams <= 4) + return make_insert(what, insert_sBIT, nparams, parameter_list); + break; + +#if 0 + case CHUNK(115,80,76,84): /* sPLT */ + return make_insert(what, insert_sPLT, nparams, parameter_list); +#endif + + default: + fprintf(stderr, "makepng --insert \"%s\": unrecognized chunk name\n", + what); + exit(1); + } + + bad_parameter_count(what, nparams); + return NULL; +} + +/* This is necessary because libpng expects writeable strings for things like + * text chunks (maybe this should be fixed...) + */ +static png_charp +strstash(png_const_charp foo) +{ + /* The program indicates a memory allocation error by crashing, this is by + * design. + */ + if (foo != NULL) + { + png_charp bar = malloc(strlen(foo)+1); + return strcpy(bar, foo); + } + + return NULL; +} + +static png_charp +strstash_list(const png_const_charp *text) +{ + size_t foo = 0; + png_charp result, bar; + const png_const_charp *line = text; + + while (*line != NULL) + foo += strlen(*line++); + + result = bar = malloc(foo+1); + + line = text; + while (*line != NULL) + { + foo = strlen(*line); + memcpy(bar, *line++, foo); + bar += foo; + } + + *bar = 0; + return result; +} + +/* These are used to insert Copyright and Licence fields, they allow the text to + * have \n unlike the --insert option. + */ +static chunk_insert * +add_tEXt(const char *key, const png_const_charp *text) +{ + static char what[5] = { 116, 69, 88, 116, 0 }; + png_charp parameter_list[3]; + + parameter_list[0] = strstash(key); + parameter_list[1] = strstash_list(text); + parameter_list[2] = NULL; + + return make_insert(what, insert_tEXt, 2, parameter_list); +} + +static chunk_insert * +add_iTXt(const char *key, const char *language, const char *language_key, + const png_const_charp *text) +{ + static char what[5] = { 105, 84, 88, 116, 0 }; + png_charp parameter_list[5]; + + parameter_list[0] = strstash(key); + parameter_list[1] = strstash(language); + parameter_list[2] = strstash(language_key); + parameter_list[3] = strstash_list(text); + parameter_list[4] = NULL; + + return make_insert(what, insert_iTXt, 4, parameter_list); +} + +/* This is a not-very-good parser for a sequence of numbers (including 0). It + * doesn't accept some apparently valid things, but it accepts all the sensible + * combinations. + */ +static void +parse_color(char *arg, unsigned int *colors) +{ + unsigned int ncolors = 0; + + while (*arg && ncolors < 4) + { + char *ep = arg; + + unsigned long ul = strtoul(arg, &ep, 0); + + if (ul > 65535) + { + fprintf(stderr, "makepng --color=...'%s': too big\n", arg); + exit(1); + } + + if (ep == arg) + { + fprintf(stderr, "makepng --color=...'%s': not a valid color\n", arg); + exit(1); + } + + if (*ep) ++ep; /* skip a separator */ + arg = ep; + + colors[++ncolors] = (unsigned int)ul; /* checked above */ + } + + if (*arg) + { + fprintf(stderr, "makepng --color=...'%s': too many values\n", arg); + exit(1); + } + + *colors = ncolors; +} + +int +main(int argc, char **argv) +{ + FILE *fp = stdout; + const char *file_name = NULL; + int color_type = 8; /* invalid */ + int bit_depth = 32; /* invalid */ + int small = 0; /* make full size images */ + int tRNS = 0; /* don't output a tRNS chunk */ + unsigned int colors[5]; + unsigned int filters = PNG_ALL_FILTERS; + png_fixed_point gamma = 0; /* not set */ + chunk_insert *head_insert = NULL; + chunk_insert **insert_ptr = &head_insert; + + memset(colors, 0, sizeof colors); + + while (--argc > 0) + { + char *arg = *++argv; + + if (strcmp(arg, "--small") == 0) + { + small = 1; + continue; + } + + if (strcmp(arg, "--tRNS") == 0) + { + tRNS = 1; + continue; + } + + if (strcmp(arg, "--sRGB") == 0) + { + gamma = PNG_DEFAULT_sRGB; + continue; + } + + if (strcmp(arg, "--linear") == 0) + { + gamma = PNG_FP_1; + continue; + } + + if (strcmp(arg, "--1.8") == 0) + { + gamma = PNG_GAMMA_MAC_18; + continue; + } + + if (strcmp(arg, "--nofilters") == 0) + { + filters = PNG_FILTER_NONE; + continue; + } + + if (strncmp(arg, "--color=", 8) == 0) + { + parse_color(arg+8, colors); + continue; + } + + if (argc >= 3 && strcmp(arg, "--insert") == 0) + { + png_const_charp what = *++argv; + png_charp param = *++argv; + chunk_insert *new_insert; + + argc -= 2; + + new_insert = find_insert(what, param); + + if (new_insert != NULL) + { + *insert_ptr = new_insert; + insert_ptr = &new_insert->next; + } + + continue; + } + + if (arg[0] == '-') + { + fprintf(stderr, "makepng: %s: invalid option\n", arg); + exit(1); + } + + if (strcmp(arg, "palette") == 0) + { + color_type = PNG_COLOR_TYPE_PALETTE; + continue; + } + + if (strncmp(arg, "gray", 4) == 0) + { + if (arg[4] == 0) + { + color_type = PNG_COLOR_TYPE_GRAY; + continue; + } + + else if (strcmp(arg+4, "a") == 0 || + strcmp(arg+4, "alpha") == 0 || + strcmp(arg+4, "-alpha") == 0) + { + color_type = PNG_COLOR_TYPE_GRAY_ALPHA; + continue; + } + } + + if (strncmp(arg, "rgb", 3) == 0) + { + if (arg[3] == 0) + { + color_type = PNG_COLOR_TYPE_RGB; + continue; + } + + else if (strcmp(arg+3, "a") == 0 || + strcmp(arg+3, "alpha") == 0 || + strcmp(arg+3, "-alpha") == 0) + { + color_type = PNG_COLOR_TYPE_RGB_ALPHA; + continue; + } + } + + if (color_type == 8 && isdigit(arg[0])) + { + color_type = atoi(arg); + if (color_type < 0 || color_type > 6 || color_type == 1 || + color_type == 5) + { + fprintf(stderr, "makepng: %s: not a valid color type\n", arg); + exit(1); + } + + continue; + } + + if (bit_depth == 32 && isdigit(arg[0])) + { + bit_depth = atoi(arg); + if (bit_depth <= 0 || bit_depth > 16 || + (bit_depth & -bit_depth) != bit_depth) + { + fprintf(stderr, "makepng: %s: not a valid bit depth\n", arg); + exit(1); + } + + continue; + } + + if (argc == 1) /* It's the file name */ + { + fp = fopen(arg, "wb"); + if (fp == NULL) + { + fprintf(stderr, "%s: %s: could not open\n", arg, strerror(errno)); + exit(1); + } + + file_name = arg; + continue; + } + + fprintf(stderr, "makepng: %s: unknown argument\n", arg); + exit(1); + } /* argument while loop */ + + if (color_type == 8 || bit_depth == 32) + { + fprintf(stderr, "usage: makepng [--small] [--sRGB|--linear|--1.8] " + "[--color=...] color-type bit-depth [file-name]\n" + " Make a test PNG file, by default writes to stdout.\n" + " Other options are available, UTSL.\n"); + exit(1); + } + + /* Check the colors */ + { + unsigned int lim = (color_type == PNG_COLOR_TYPE_PALETTE ? 255U : + (1U< lim) + { + fprintf(stderr, "makepng: --color=...: %u out of range [0..%u]\n", + colors[i], lim); + exit(1); + } + } + + /* small and colors are incomparible (will probably crash if both are used at + * the same time!) + */ + if (small && colors[0] != 0) + { + fprintf(stderr, "makepng: --color --small: only one at a time!\n"); + exit(1); + } + + /* Restrict the filters for more speed to those we know are used for the + * generated images. + */ + if (filters == PNG_ALL_FILTERS && !small/*small provides defaults*/) + { + if ((color_type & PNG_COLOR_MASK_PALETTE) != 0 || bit_depth < 8) + filters = PNG_FILTER_NONE; + + else if (color_type & PNG_COLOR_MASK_COLOR) /* rgb */ + { + if (bit_depth == 8) + filters &= ~(PNG_FILTER_NONE | PNG_FILTER_AVG); + + else + filters = PNG_FILTER_SUB | PNG_FILTER_PAETH; + } + + else /* gray 8 or 16-bit */ + filters &= ~PNG_FILTER_NONE; + } + + /* Insert standard copyright and licence text. */ + { + static png_const_charp copyright[] = + { + COPYRIGHT, /* ISO-Latin-1 */ + NULL + }; + static png_const_charp licensing[] = + { + IMAGE_LICENSING, /* UTF-8 */ + NULL + }; + + chunk_insert *new_insert; + + new_insert = add_tEXt("Copyright", copyright); + if (new_insert != NULL) + { + *insert_ptr = new_insert; + insert_ptr = &new_insert->next; + } + + new_insert = add_iTXt("Licensing", "en", NULL, licensing); + if (new_insert != NULL) + { + *insert_ptr = new_insert; + insert_ptr = &new_insert->next; + } + } + + { + int ret = write_png(&file_name, fp, color_type, bit_depth, gamma, + head_insert, filters, colors, small, tRNS); + + if (ret != 0 && file_name != NULL) + remove(file_name); + + return ret; + } +} diff --git a/extern/libpng/contrib/libtests/pngimage.c b/extern/libpng/contrib/libtests/pngimage.c new file mode 100644 index 0000000000..f130c043df --- /dev/null +++ b/extern/libpng/contrib/libtests/pngimage.c @@ -0,0 +1,1712 @@ +/* pngimage.c + * + * Copyright (c) 2015,2016 John Cunningham Bowler + * + * Last changed in libpng 1.6.24 [August 4, 2016] + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + * + * Test the png_read_png and png_write_png interfaces. Given a PNG file load it + * using png_read_png and then write with png_write_png. Test all possible + * transforms. + */ +#include +#include +#include +#include +#include +#include + +#if defined(HAVE_CONFIG_H) && !defined(PNG_NO_CONFIG_H) +# include +#endif + +/* Define the following to use this test against your installed libpng, rather + * than the one being built here: + */ +#ifdef PNG_FREESTANDING_TESTS +# include +#else +# include "../../png.h" +#endif + +#ifndef PNG_SETJMP_SUPPORTED +# include /* because png.h did *not* include this */ +#endif + +/* 1.6.1 added support for the configure test harness, which uses 77 to indicate + * a skipped test, in earlier versions we need to succeed on a skipped test, so: + */ +#if PNG_LIBPNG_VER >= 10601 && defined(HAVE_CONFIG_H) +# define SKIP 77 +#else +# define SKIP 0 +#endif + +#if PNG_LIBPNG_VER < 10700 + /* READ_PNG and WRITE_PNG were not defined, so: */ +# ifdef PNG_INFO_IMAGE_SUPPORTED +# ifdef PNG_SEQUENTIAL_READ_SUPPORTED +# define PNG_READ_PNG_SUPPORTED +# endif /* SEQUENTIAL_READ */ +# ifdef PNG_WRITE_SUPPORTED +# define PNG_WRITE_PNG_SUPPORTED +# endif /* WRITE */ +# endif /* INFO_IMAGE */ +#endif /* pre 1.7.0 */ + +#ifdef PNG_READ_PNG_SUPPORTED +/* If a transform is valid on both read and write this implies that if the + * transform is applied to read it must also be applied on write to produce + * meaningful data. This is because these transforms when performed on read + * produce data with a memory format that does not correspond to a PNG format. + * + * Most of these transforms are invertible; after applying the transform on + * write the result is the original PNG data that would have would have been + * read if no transform were applied. + * + * The exception is _SHIFT, which destroys the low order bits marked as not + * significant in a PNG with the sBIT chunk. + * + * The following table lists, for each transform, the conditions under which it + * is expected to do anything. Conditions are defined as follows: + * + * 1) Color mask bits required - simply a mask to AND with color_type; one of + * these must be present for the transform to fire, except that 0 means + * 'always'. + * 2) Color mask bits which must be absent - another mask - none of these must + * be present. + * 3) Bit depths - a mask of component bit depths for the transform to fire. + * 4) 'read' - the transform works in png_read_png. + * 5) 'write' - the transform works in png_write_png. + * 6) PNG_INFO_chunk; a mask of the chunks that must be present for the + * transform to fire. All must be present - the requirement is that + * png_get_valid() & mask == mask, so if mask is 0 there is no requirement. + * + * The condition refers to the original image state - if multiple transforms are + * used together it is possible to cause a transform that wouldn't fire on the + * original image to fire. + */ +static struct transform_info +{ + const char *name; + int transform; + png_uint_32 valid_chunks; +# define CHUNK_NONE 0 +# define CHUNK_sBIT PNG_INFO_sBIT +# define CHUNK_tRNS PNG_INFO_tRNS + png_byte color_mask_required; + png_byte color_mask_absent; +# define COLOR_MASK_X 0 +# define COLOR_MASK_P PNG_COLOR_MASK_PALETTE +# define COLOR_MASK_C PNG_COLOR_MASK_COLOR +# define COLOR_MASK_A PNG_COLOR_MASK_ALPHA +# define COLOR_MASK_ALL (PALETTE+COLOR+ALPHA) /* absent = gray, no alpha */ + png_byte bit_depths; +# define BD_ALL (1 + 2 + 4 + 8 + 16) +# define BD_PAL (1 + 2 + 4 + 8) +# define BD_LOW (1 + 2 + 4) +# define BD_16 16 +# define BD_TRUE (8+16) /* i.e. true-color depths */ + png_byte when; +# define TRANSFORM_R 1 +# define TRANSFORM_W 2 +# define TRANSFORM_RW 3 + png_byte tested; /* the transform was tested somewhere */ +} transform_info[] = +{ + /* List ALL the PNG_TRANSFORM_ macros here. Check for support using the READ + * macros; even if the transform is supported on write it cannot be tested + * without the read support. + */ +# define T(name,chunk,cm_required,cm_absent,bd,when)\ + { #name, PNG_TRANSFORM_ ## name, CHUNK_ ## chunk,\ + COLOR_MASK_ ## cm_required, COLOR_MASK_ ## cm_absent, BD_ ## bd,\ + TRANSFORM_ ## when, 0/*!tested*/ } + +#ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED + T(STRIP_16, NONE, X, X, 16, R), + /* drops the bottom 8 bits when bit depth is 16 */ +#endif +#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED + T(STRIP_ALPHA, NONE, A, X, ALL, R), + /* removes the alpha channel if present */ +#endif +#ifdef PNG_WRITE_PACK_SUPPORTED +# define TRANSFORM_RW_PACK TRANSFORM_RW +#else +# define TRANSFORM_RW_PACK TRANSFORM_R +#endif +#ifdef PNG_READ_PACK_SUPPORTED + T(PACKING, NONE, X, X, LOW, RW_PACK), + /* unpacks low-bit-depth components into 1 byte per component on read, + * reverses this on write. + */ +#endif +#ifdef PNG_WRITE_PACKSWAP_SUPPORTED +# define TRANSFORM_RW_PACKSWAP TRANSFORM_RW +#else +# define TRANSFORM_RW_PACKSWAP TRANSFORM_R +#endif +#ifdef PNG_READ_PACKSWAP_SUPPORTED + T(PACKSWAP, NONE, X, X, LOW, RW_PACKSWAP), + /* reverses the order of low-bit-depth components packed into a byte */ +#endif +#ifdef PNG_READ_EXPAND_SUPPORTED + T(EXPAND, NONE, P, X, ALL, R), + /* expands PLTE PNG files to RGB (no tRNS) or RGBA (tRNS) * + * Note that the 'EXPAND' transform does lots of different things: */ + T(EXPAND, NONE, X, C, ALL, R), + /* expands grayscale PNG files to RGB, or RGBA */ + T(EXPAND, tRNS, X, A, ALL, R), + /* expands the tRNS chunk in files without alpha */ +#endif +#ifdef PNG_WRITE_INVERT_SUPPORTED +# define TRANSFORM_RW_INVERT TRANSFORM_RW +#else +# define TRANSFORM_RW_INVERT TRANSFORM_R +#endif +#ifdef PNG_READ_INVERT_SUPPORTED + T(INVERT_MONO, NONE, X, C, ALL, RW_INVERT), + /* converts gray-scale components to 1..0 from 0..1 */ +#endif +#ifdef PNG_WRITE_SHIFT_SUPPORTED +# define TRANSFORM_RW_SHIFT TRANSFORM_RW +#else +# define TRANSFORM_RW_SHIFT TRANSFORM_R +#endif +#ifdef PNG_READ_SHIFT_SUPPORTED + T(SHIFT, sBIT, X, X, ALL, RW_SHIFT), + /* reduces component values to the original range based on the sBIT chunk, + * this is only partially reversible - the low bits are lost and cannot be + * recovered on write. In fact write code replicates the bits to generate + * new low-order bits. + */ +#endif +#ifdef PNG_WRITE_BGR_SUPPORTED +# define TRANSFORM_RW_BGR TRANSFORM_RW +#else +# define TRANSFORM_RW_BGR TRANSFORM_R +#endif +#ifdef PNG_READ_BGR_SUPPORTED + T(BGR, NONE, C, P, TRUE, RW_BGR), + /* reverses the rgb component values of true-color pixels */ +#endif +#ifdef PNG_WRITE_SWAP_ALPHA_SUPPORTED +# define TRANSFORM_RW_SWAP_ALPHA TRANSFORM_RW +#else +# define TRANSFORM_RW_SWAP_ALPHA TRANSFORM_R +#endif +#ifdef PNG_READ_SWAP_ALPHA_SUPPORTED + T(SWAP_ALPHA, NONE, A, X, TRUE, RW_SWAP_ALPHA), + /* swaps the alpha channel of RGBA or GA pixels to the front - ARGB or + * AG, on write reverses the process. + */ +#endif +#ifdef PNG_WRITE_SWAP_SUPPORTED +# define TRANSFORM_RW_SWAP TRANSFORM_RW +#else +# define TRANSFORM_RW_SWAP TRANSFORM_R +#endif +#ifdef PNG_READ_SWAP_SUPPORTED + T(SWAP_ENDIAN, NONE, X, P, 16, RW_SWAP), + /* byte-swaps 16-bit component values */ +#endif +#ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED +# define TRANSFORM_RW_INVERT_ALPHA TRANSFORM_RW +#else +# define TRANSFORM_RW_INVERT_ALPHA TRANSFORM_R +#endif +#ifdef PNG_READ_INVERT_ALPHA_SUPPORTED + T(INVERT_ALPHA, NONE, A, X, TRUE, RW_INVERT_ALPHA), + /* converts an alpha channel from 0..1 to 1..0 */ +#endif +#ifdef PNG_WRITE_FILLER_SUPPORTED + T(STRIP_FILLER_BEFORE, NONE, A, P, TRUE, W), /* 'A' for a filler! */ + /* on write skips a leading filler channel; testing requires data with a + * filler channel so this is produced from RGBA or GA images by removing + * the 'alpha' flag from the color type in place. + */ + T(STRIP_FILLER_AFTER, NONE, A, P, TRUE, W), + /* on write strips a trailing filler channel */ +#endif +#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED + T(GRAY_TO_RGB, NONE, X, C, ALL, R), + /* expands grayscale images to RGB, also causes the palette part of + * 'EXPAND' to happen. Low bit depth grayscale images are expanded to + * 8-bits per component and no attempt is made to convert the image to a + * palette image. While this transform is partially reversible + * png_write_png does not currently support this. + */ + T(GRAY_TO_RGB, NONE, P, X, ALL, R), + /* The 'palette' side effect mentioned above; a bit bogus but this is the + * way the libpng code works. + */ +#endif +#ifdef PNG_READ_EXPAND_16_SUPPORTED + T(EXPAND_16, NONE, X, X, PAL, R), + /* expands images to 16-bits per component, as a side effect expands + * palette images to RGB and expands the tRNS chunk if present, so it can + * modify 16-bit per component images as well: + */ + T(EXPAND_16, tRNS, X, A, 16, R), + /* side effect of EXPAND_16 - expands the tRNS chunk in an RGB or G 16-bit + * image. + */ +#endif +#ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED + T(SCALE_16, NONE, X, X, 16, R), + /* scales 16-bit components to 8-bits. */ +#endif + + { NULL /*name*/, 0, 0, 0, 0, 0, 0, 0/*!tested*/ } + +#undef T +}; + +#define ARRAY_SIZE(a) ((sizeof a)/(sizeof a[0])) +#define TTABLE_SIZE ARRAY_SIZE(transform_info) + +/* Some combinations of options that should be reversible are not; these cases + * are bugs. + */ +static int known_bad_combos[][2] = +{ + /* problem, antidote */ + { PNG_TRANSFORM_SHIFT | PNG_TRANSFORM_INVERT_ALPHA, 0/*antidote*/ } +}; + +static int +is_combo(int transforms) +{ + return transforms & (transforms-1); /* non-zero if more than one set bit */ +} + +static int +first_transform(int transforms) +{ + return transforms & -transforms; /* lowest set bit */ +} + +static int +is_bad_combo(int transforms) +{ + unsigned int i; + + for (i=0; ifirst.next = NULL; + buffer->last = NULL; + buffer->current = NULL; +} + +static void +buffer_destroy_list(struct buffer_list *list) +{ + if (list != NULL) + { + struct buffer_list *next = list->next; + DELETE(list); + buffer_destroy_list(next); + } +} + +static void +buffer_destroy(struct buffer *buffer) +{ + struct buffer_list *list = buffer->first.next; + buffer_init(buffer); + buffer_destroy_list(list); +} + +#ifdef PNG_WRITE_PNG_SUPPORTED +static void +buffer_start_write(struct buffer *buffer) +{ + buffer->last = &buffer->first; + buffer->end_count = 0; + buffer->current = NULL; +} +#endif + +static void +buffer_start_read(struct buffer *buffer) +{ + buffer->current = &buffer->first; + buffer->read_count = 0; +} + +#ifdef ENOMEM /* required by POSIX 1003.1 */ +# define MEMORY ENOMEM +#else +# define MEMORY ERANGE /* required by ANSI-C */ +#endif +static struct buffer * +get_buffer(png_structp pp) + /* Used from libpng callbacks to get the current buffer */ +{ + return (struct buffer*)png_get_io_ptr(pp); +} + +static struct buffer_list * +buffer_extend(struct buffer_list *current) +{ + struct buffer_list *add; + + assert(current->next == NULL); + + add = NEW(struct buffer_list); + if (add == NULL) + return NULL; + + add->next = NULL; + current->next = add; + + return add; +} + +/* Load a buffer from a file; does the equivalent of buffer_start_write. On a + * read error returns an errno value, else returns 0. + */ +static int +buffer_from_file(struct buffer *buffer, FILE *fp) +{ + struct buffer_list *last = &buffer->first; + size_t count = 0; + + for (;;) + { + size_t r = fread(last->buffer+count, 1/*size*/, + (sizeof last->buffer)-count, fp); + + if (r > 0) + { + count += r; + + if (count >= sizeof last->buffer) + { + assert(count == sizeof last->buffer); + count = 0; + + if (last->next == NULL) + { + last = buffer_extend(last); + if (last == NULL) + return MEMORY; + } + + else + last = last->next; + } + } + + else /* fread failed - probably end of file */ + { + if (feof(fp)) + { + buffer->last = last; + buffer->end_count = count; + return 0; /* no error */ + } + + /* Some kind of funky error; errno should be non-zero */ + return errno == 0 ? ERANGE : errno; + } + } +} + +/* This structure is used to control the test of a single file. */ +typedef enum +{ + VERBOSE, /* switches on all messages */ + INFORMATION, + WARNINGS, /* switches on warnings */ + LIBPNG_WARNING, + APP_WARNING, + ERRORS, /* just errors */ + APP_FAIL, /* continuable error - no need to longjmp */ + LIBPNG_ERROR, /* this and higher cause a longjmp */ + LIBPNG_BUG, /* erroneous behavior in libpng */ + APP_ERROR, /* such as out-of-memory in a callback */ + QUIET, /* no normal messages */ + USER_ERROR, /* such as file-not-found */ + INTERNAL_ERROR +} error_level; +#define LEVEL_MASK 0xf /* where the level is in 'options' */ + +#define EXHAUSTIVE 0x010 /* Test all combinations of active options */ +#define STRICT 0x020 /* Fail on warnings as well as errors */ +#define LOG 0x040 /* Log pass/fail to stdout */ +#define CONTINUE 0x080 /* Continue on APP_FAIL errors */ +#define SKIP_BUGS 0x100 /* Skip over known bugs */ +#define LOG_SKIPPED 0x200 /* Log skipped bugs */ +#define FIND_BAD_COMBOS 0x400 /* Attempt to deduce bad combos */ +#define LIST_COMBOS 0x800 /* List combos by name */ + +/* Result masks apply to the result bits in the 'results' field below; these + * bits are simple 1U<options = WARNINGS; /* default to !verbose, !quiet */ + dp->filename = NULL; + dp->operation = NULL; + dp->original_pp = NULL; + dp->original_ip = NULL; + dp->original_rows = NULL; + dp->read_pp = NULL; + dp->read_ip = NULL; + buffer_init(&dp->original_file); + +# ifdef PNG_WRITE_PNG_SUPPORTED + dp->write_pp = NULL; + buffer_init(&dp->written_file); +# endif +} + +static void +display_clean_read(struct display *dp) +{ + if (dp->read_pp != NULL) + png_destroy_read_struct(&dp->read_pp, &dp->read_ip, NULL); +} + +#ifdef PNG_WRITE_PNG_SUPPORTED +static void +display_clean_write(struct display *dp) +{ + if (dp->write_pp != NULL) + png_destroy_write_struct(&dp->write_pp, NULL); +} +#endif + +static void +display_clean(struct display *dp) +{ +# ifdef PNG_WRITE_PNG_SUPPORTED + display_clean_write(dp); +# endif + display_clean_read(dp); + + dp->original_rowbytes = 0; + dp->original_rows = NULL; + dp->chunks = 0; + + png_destroy_read_struct(&dp->original_pp, &dp->original_ip, NULL); + /* leave the filename for error detection */ + dp->results = 0; /* reset for next time */ +} + +static void +display_destroy(struct display *dp) +{ + /* Release any memory held in the display. */ +# ifdef PNG_WRITE_PNG_SUPPORTED + buffer_destroy(&dp->written_file); +# endif + + buffer_destroy(&dp->original_file); +} + +static struct display * +get_dp(png_structp pp) + /* The display pointer is always stored in the png_struct error pointer */ +{ + struct display *dp = (struct display*)png_get_error_ptr(pp); + + if (dp == NULL) + { + fprintf(stderr, "pngimage: internal error (no display)\n"); + exit(99); /* prevents a crash */ + } + + return dp; +} + +/* error handling */ +#ifdef __GNUC__ +# define VGATTR __attribute__((__format__ (__printf__,3,4))) + /* Required to quiet GNUC warnings when the compiler sees a stdarg function + * that calls one of the stdio v APIs. + */ +#else +# define VGATTR +#endif +static void VGATTR +display_log(struct display *dp, error_level level, const char *fmt, ...) + /* 'level' is as above, fmt is a stdio style format string. This routine + * does not return if level is above LIBPNG_WARNING + */ +{ + dp->results |= 1U << level; + + if (level > (error_level)(dp->options & LEVEL_MASK)) + { + const char *lp; + va_list ap; + + switch (level) + { + case INFORMATION: lp = "information"; break; + case LIBPNG_WARNING: lp = "warning(libpng)"; break; + case APP_WARNING: lp = "warning(pngimage)"; break; + case APP_FAIL: lp = "error(continuable)"; break; + case LIBPNG_ERROR: lp = "error(libpng)"; break; + case LIBPNG_BUG: lp = "bug(libpng)"; break; + case APP_ERROR: lp = "error(pngimage)"; break; + case USER_ERROR: lp = "error(user)"; break; + + case INTERNAL_ERROR: /* anything unexpected is an internal error: */ + case VERBOSE: case WARNINGS: case ERRORS: case QUIET: + default: lp = "bug(pngimage)"; break; + } + + fprintf(stderr, "%s: %s: %s", + dp->filename != NULL ? dp->filename : "", lp, dp->operation); + + if (dp->transforms != 0) + { + int tr = dp->transforms; + + if (is_combo(tr)) + { + if (dp->options & LIST_COMBOS) + { + int trx = tr; + + fprintf(stderr, "("); + if (trx) + { + int start = 0; + + while (trx) + { + int trz = trx & -trx; + + if (start) fprintf(stderr, "+"); + fprintf(stderr, "%s", transform_name(trz)); + start = 1; + trx &= ~trz; + } + } + + else + fprintf(stderr, "-"); + fprintf(stderr, ")"); + } + + else + fprintf(stderr, "(0x%x)", tr); + } + + else + fprintf(stderr, "(%s)", transform_name(tr)); + } + + fprintf(stderr, ": "); + + va_start(ap, fmt); + vfprintf(stderr, fmt, ap); + va_end(ap); + + fputc('\n', stderr); + } + /* else do not output any message */ + + /* Errors cause this routine to exit to the fail code */ + if (level > APP_FAIL || (level > ERRORS && !(dp->options & CONTINUE))) + longjmp(dp->error_return, level); +} + +/* error handler callbacks for libpng */ +static void PNGCBAPI +display_warning(png_structp pp, png_const_charp warning) +{ + display_log(get_dp(pp), LIBPNG_WARNING, "%s", warning); +} + +static void PNGCBAPI +display_error(png_structp pp, png_const_charp error) +{ + struct display *dp = get_dp(pp); + + display_log(dp, LIBPNG_ERROR, "%s", error); +} + +static void +display_cache_file(struct display *dp, const char *filename) + /* Does the initial cache of the file. */ +{ + FILE *fp; + int ret; + + dp->filename = filename; + + if (filename != NULL) + { + fp = fopen(filename, "rb"); + if (fp == NULL) + display_log(dp, USER_ERROR, "open failed: %s", strerror(errno)); + } + + else + fp = stdin; + + ret = buffer_from_file(&dp->original_file, fp); + + fclose(fp); + + if (ret != 0) + display_log(dp, APP_ERROR, "read failed: %s", strerror(ret)); +} + +static void +buffer_read(struct display *dp, struct buffer *bp, png_bytep data, + size_t size) +{ + struct buffer_list *last = bp->current; + size_t read_count = bp->read_count; + + while (size > 0) + { + size_t avail; + + if (last == NULL || + (last == bp->last && read_count >= bp->end_count)) + { + display_log(dp, USER_ERROR, "file truncated (%lu bytes)", + (unsigned long)size); + /*NOTREACHED*/ + break; + } + + else if (read_count >= sizeof last->buffer) + { + /* Move to the next buffer: */ + last = last->next; + read_count = 0; + bp->current = last; /* Avoid update outside the loop */ + + /* And do a sanity check (the EOF case is caught above) */ + if (last == NULL) + { + display_log(dp, INTERNAL_ERROR, "damaged buffer list"); + /*NOTREACHED*/ + break; + } + } + + avail = (sizeof last->buffer) - read_count; + if (avail > size) + avail = size; + + memcpy(data, last->buffer + read_count, avail); + read_count += avail; + size -= avail; + data += avail; + } + + bp->read_count = read_count; +} + +static void PNGCBAPI +read_function(png_structp pp, png_bytep data, size_t size) +{ + buffer_read(get_dp(pp), get_buffer(pp), data, size); +} + +static void +read_png(struct display *dp, struct buffer *bp, const char *operation, + int transforms) +{ + png_structp pp; + png_infop ip; + + /* This cleans out any previous read and sets operation and transforms to + * empty. + */ + display_clean_read(dp); + + if (operation != NULL) /* else this is a verify and do not overwrite info */ + { + dp->operation = operation; + dp->transforms = transforms; + } + + dp->read_pp = pp = png_create_read_struct(PNG_LIBPNG_VER_STRING, dp, + display_error, display_warning); + if (pp == NULL) + display_log(dp, LIBPNG_ERROR, "failed to create read struct"); + + /* The png_read_png API requires us to make the info struct, but it does the + * call to png_read_info. + */ + dp->read_ip = ip = png_create_info_struct(pp); + if (ip == NULL) + display_log(dp, LIBPNG_ERROR, "failed to create info struct"); + +# ifdef PNG_SET_USER_LIMITS_SUPPORTED + /* Remove the user limits, if any */ + png_set_user_limits(pp, 0x7fffffff, 0x7fffffff); +# endif + + /* Set the IO handling */ + buffer_start_read(bp); + png_set_read_fn(pp, bp, read_function); + + png_read_png(pp, ip, transforms, NULL/*params*/); + +#if 0 /* crazy debugging */ + { + png_bytep pr = png_get_rows(pp, ip)[0]; + size_t rb = png_get_rowbytes(pp, ip); + size_t cb; + char c = ' '; + + fprintf(stderr, "%.4x %2d (%3lu bytes):", transforms, png_get_bit_depth(pp,ip), (unsigned long)rb); + + for (cb=0; cboriginal_file, "original read", 0/*no transform*/); + + /* Move the result to the 'original' fields */ + dp->original_pp = pp = dp->read_pp, dp->read_pp = NULL; + dp->original_ip = ip = dp->read_ip, dp->read_ip = NULL; + + dp->original_rowbytes = png_get_rowbytes(pp, ip); + if (dp->original_rowbytes == 0) + display_log(dp, LIBPNG_BUG, "png_get_rowbytes returned 0"); + + dp->chunks = png_get_valid(pp, ip, 0xffffffff); + if ((dp->chunks & PNG_INFO_IDAT) == 0) /* set by png_read_png */ + display_log(dp, LIBPNG_BUG, "png_read_png did not set IDAT flag"); + + dp->original_rows = png_get_rows(pp, ip); + if (dp->original_rows == NULL) + display_log(dp, LIBPNG_BUG, "png_read_png did not create row buffers"); + + if (!png_get_IHDR(pp, ip, + &dp->width, &dp->height, &dp->bit_depth, &dp->color_type, + &dp->interlace_method, &dp->compression_method, &dp->filter_method)) + display_log(dp, LIBPNG_BUG, "png_get_IHDR failed"); + + /* 'active' transforms are discovered based on the original image format; + * running one active transform can activate others. At present the code + * does not attempt to determine the closure. + */ + { + png_uint_32 chunks = dp->chunks; + int active = 0, inactive = 0; + int ct = dp->color_type; + int bd = dp->bit_depth; + unsigned int i; + + for (i=0; iactive_transforms = active; + dp->ignored_transforms = inactive; /* excluding write-only transforms */ + } +} + +static int +compare_read(struct display *dp, int applied_transforms) +{ + /* Compare the png_info from read_ip with original_info */ + size_t rowbytes; + png_uint_32 width, height; + int bit_depth, color_type; + int interlace_method, compression_method, filter_method; + const char *e = NULL; + + png_get_IHDR(dp->read_pp, dp->read_ip, &width, &height, &bit_depth, + &color_type, &interlace_method, &compression_method, &filter_method); + +# define C(item) if (item != dp->item) \ + display_log(dp, APP_WARNING, "IHDR " #item "(%lu) changed to %lu",\ + (unsigned long)dp->item, (unsigned long)item), e = #item + + /* The IHDR should be identical: */ + C(width); + C(height); + C(bit_depth); + C(color_type); + C(interlace_method); + C(compression_method); + C(filter_method); + + /* 'e' remains set to the name of the last thing changed: */ + if (e) + display_log(dp, APP_ERROR, "IHDR changed (%s)", e); + + /* All the chunks from the original PNG should be preserved in the output PNG + * because the PNG format has not been changed. + */ + { + unsigned long chunks = + png_get_valid(dp->read_pp, dp->read_ip, 0xffffffff); + + if (chunks != dp->chunks) + display_log(dp, APP_FAIL, "PNG chunks changed from 0x%lx to 0x%lx", + (unsigned long)dp->chunks, chunks); + } + + /* rowbytes should be the same */ + rowbytes = png_get_rowbytes(dp->read_pp, dp->read_ip); + + /* NOTE: on 64-bit systems this may trash the top bits of rowbytes, + * which could lead to weird error messages. + */ + if (rowbytes != dp->original_rowbytes) + display_log(dp, APP_ERROR, "PNG rowbytes changed from %lu to %lu", + (unsigned long)dp->original_rowbytes, (unsigned long)rowbytes); + + /* The rows should be the same too, unless the applied transforms includes + * the shift transform, in which case low bits may have been lost. + */ + { + png_bytepp rows = png_get_rows(dp->read_pp, dp->read_ip); + unsigned int mask; /* mask (if not zero) for the final byte */ + + if (bit_depth < 8) + { + /* Need the stray bits at the end, this depends only on the low bits + * of the image width; overflow does not matter. If the width is an + * exact multiple of 8 bits this gives a mask of 0, not 0xff. + */ + mask = 0xff & (0xff00 >> ((bit_depth * width) & 7)); + } + + else + mask = 0; + + if (rows == NULL) + display_log(dp, LIBPNG_BUG, "png_get_rows returned NULL"); + + if ((applied_transforms & PNG_TRANSFORM_SHIFT) == 0 || + (dp->active_transforms & PNG_TRANSFORM_SHIFT) == 0 || + color_type == PNG_COLOR_TYPE_PALETTE) + { + unsigned long y; + + for (y=0; yoriginal_rows[y]; + + if (memcmp(row, orig, rowbytes-(mask != 0)) != 0 || (mask != 0 && + ((row[rowbytes-1] & mask) != (orig[rowbytes-1] & mask)))) + { + size_t x; + + /* Find the first error */ + for (x=0; x 0x%.2x", + (unsigned long)x, (unsigned long)y, orig[x], row[x]); + return 0; /* don't keep reporting failed rows on 'continue' */ + } + } + } + + else +# ifdef PNG_sBIT_SUPPORTED + { + unsigned long y; + int bpp; /* bits-per-pixel then bytes-per-pixel */ + /* components are up to 8 bytes in size */ + png_byte sig_bits[8]; + png_color_8p sBIT; + + if (png_get_sBIT(dp->read_pp, dp->read_ip, &sBIT) != PNG_INFO_sBIT) + display_log(dp, INTERNAL_ERROR, + "active shift transform but no sBIT in file"); + + switch (color_type) + { + case PNG_COLOR_TYPE_GRAY: + sig_bits[0] = sBIT->gray; + bpp = bit_depth; + break; + + case PNG_COLOR_TYPE_GA: + sig_bits[0] = sBIT->gray; + sig_bits[1] = sBIT->alpha; + bpp = 2 * bit_depth; + break; + + case PNG_COLOR_TYPE_RGB: + sig_bits[0] = sBIT->red; + sig_bits[1] = sBIT->green; + sig_bits[2] = sBIT->blue; + bpp = 3 * bit_depth; + break; + + case PNG_COLOR_TYPE_RGBA: + sig_bits[0] = sBIT->red; + sig_bits[1] = sBIT->green; + sig_bits[2] = sBIT->blue; + sig_bits[3] = sBIT->alpha; + bpp = 4 * bit_depth; + break; + + default: + display_log(dp, LIBPNG_ERROR, "invalid colour type %d", + color_type); + /*NOTREACHED*/ + bpp = 0; + break; + } + + { + int b; + + for (b=0; 8*b bit_depth/*!palette*/) + display_log(dp, LIBPNG_BUG, + "invalid sBIT[%u] value %d returned for PNG bit depth %d", + b, sig_bits[b], bit_depth); + } + } + + if (bpp < 8 && bpp != bit_depth) + { + /* sanity check; this is a grayscale PNG; something is wrong in the + * code above. + */ + display_log(dp, INTERNAL_ERROR, "invalid bpp %u for bit_depth %u", + bpp, bit_depth); + } + + switch (bit_depth) + { + int b; + + case 16: /* Two bytes per component, big-endian */ + for (b = (bpp >> 4); b > 0; --b) + { + unsigned int sig = (unsigned int)(0xffff0000 >> sig_bits[b]); + + sig_bits[2*b+1] = (png_byte)sig; + sig_bits[2*b+0] = (png_byte)(sig >> 8); /* big-endian */ + } + break; + + case 8: /* One byte per component */ + for (b=0; b*8 < bpp; ++b) + sig_bits[b] = (png_byte)(0xff00 >> sig_bits[b]); + break; + + case 1: /* allowed, but dumb */ + /* Value is 1 */ + sig_bits[0] = 0xff; + break; + + case 2: /* Replicate 4 times */ + /* Value is 1 or 2 */ + b = 0x3 & ((0x3<<2) >> sig_bits[0]); + b |= b << 2; + b |= b << 4; + sig_bits[0] = (png_byte)b; + break; + + case 4: /* Relicate twice */ + /* Value is 1, 2, 3 or 4 */ + b = 0xf & ((0xf << 4) >> sig_bits[0]); + b |= b << 4; + sig_bits[0] = (png_byte)b; + break; + + default: + display_log(dp, LIBPNG_BUG, "invalid bit depth %d", bit_depth); + break; + } + + /* Convert bpp to bytes; this gives '1' for low-bit depth grayscale, + * where there are multiple pixels per byte. + */ + bpp = (bpp+7) >> 3; + + /* The mask can be combined with sig_bits[0] */ + if (mask != 0) + { + mask &= sig_bits[0]; + + if (bpp != 1 || mask == 0) + display_log(dp, INTERNAL_ERROR, "mask calculation error %u, %u", + bpp, mask); + } + + for (y=0; yoriginal_rows[y]; + unsigned long x; + + for (x=0; x<(width-(mask!=0)); ++x) + { + int b; + + for (b=0; b%.2x", + x, b, y, orig[-1], row[-1]); + return 0; + } + } + } + + if (mask != 0 && (*row & mask) != (*orig & mask)) + { + display_log(dp, APP_FAIL, + "significant bits at (%lu[end],%lu) changed", x, y); + return 0; + } + } /* for y */ + } +# else /* !sBIT */ + display_log(dp, INTERNAL_ERROR, + "active shift transform but no sBIT support"); +# endif /* !sBIT */ + } + + return 1; /* compare succeeded */ +} + +#ifdef PNG_WRITE_PNG_SUPPORTED +static void +buffer_write(struct display *dp, struct buffer *buffer, png_bytep data, + size_t size) + /* Generic write function used both from the write callback provided to + * libpng and from the generic read code. + */ +{ + /* Write the data into the buffer, adding buffers as required */ + struct buffer_list *last = buffer->last; + size_t end_count = buffer->end_count; + + while (size > 0) + { + size_t avail; + + if (end_count >= sizeof last->buffer) + { + if (last->next == NULL) + { + last = buffer_extend(last); + + if (last == NULL) + display_log(dp, APP_ERROR, "out of memory saving file"); + } + + else + last = last->next; + + buffer->last = last; /* avoid the need to rewrite every time */ + end_count = 0; + } + + avail = (sizeof last->buffer) - end_count; + if (avail > size) + avail = size; + + memcpy(last->buffer + end_count, data, avail); + end_count += avail; + size -= avail; + data += avail; + } + + buffer->end_count = end_count; +} + +static void PNGCBAPI +write_function(png_structp pp, png_bytep data, size_t size) +{ + buffer_write(get_dp(pp), get_buffer(pp), data, size); +} + +static void +write_png(struct display *dp, png_infop ip, int transforms) +{ + display_clean_write(dp); /* safety */ + + buffer_start_write(&dp->written_file); + dp->operation = "write"; + dp->transforms = transforms; + + dp->write_pp = png_create_write_struct(PNG_LIBPNG_VER_STRING, dp, + display_error, display_warning); + + if (dp->write_pp == NULL) + display_log(dp, APP_ERROR, "failed to create write png_struct"); + + png_set_write_fn(dp->write_pp, &dp->written_file, write_function, + NULL/*flush*/); + +# ifdef PNG_SET_USER_LIMITS_SUPPORTED + /* Remove the user limits, if any */ + png_set_user_limits(dp->write_pp, 0x7fffffff, 0x7fffffff); +# endif + + /* Certain transforms require the png_info to be zapped to allow the + * transform to work correctly. + */ + if (transforms & (PNG_TRANSFORM_PACKING| + PNG_TRANSFORM_STRIP_FILLER| + PNG_TRANSFORM_STRIP_FILLER_BEFORE)) + { + int ct = dp->color_type; + + if (transforms & (PNG_TRANSFORM_STRIP_FILLER| + PNG_TRANSFORM_STRIP_FILLER_BEFORE)) + ct &= ~PNG_COLOR_MASK_ALPHA; + + png_set_IHDR(dp->write_pp, ip, dp->width, dp->height, dp->bit_depth, ct, + dp->interlace_method, dp->compression_method, dp->filter_method); + } + + png_write_png(dp->write_pp, ip, transforms, NULL/*params*/); + + /* Clean it on the way out - if control returns to the caller then the + * written_file contains the required data. + */ + display_clean_write(dp); +} +#endif /* WRITE_PNG */ + +static int +skip_transform(struct display *dp, int tr) + /* Helper to test for a bad combo and log it if it is skipped */ +{ + if ((dp->options & SKIP_BUGS) != 0 && is_bad_combo(tr)) + { + /* Log this to stdout if logging is on, otherwise just do an information + * display_log. + */ + if ((dp->options & LOG_SKIPPED) != 0) + { + printf("SKIP: %s transforms ", dp->filename); + + while (tr != 0) + { + int next = first_transform(tr); + tr &= ~next; + + printf("%s", transform_name(next)); + if (tr != 0) + putchar('+'); + } + + putchar('\n'); + } + + else + display_log(dp, INFORMATION, "%s: skipped known bad combo 0x%x", + dp->filename, tr); + + return 1; /* skip */ + } + + return 0; /* don't skip */ +} + +static void +test_one_file(struct display *dp, const char *filename) +{ + /* First cache the file and update the display original file + * information for the new file. + */ + dp->operation = "cache file"; + dp->transforms = 0; + display_cache_file(dp, filename); + update_display(dp); + + /* First test: if there are options that should be ignored for this file + * verify that they really are ignored. + */ + if (dp->ignored_transforms != 0) + { + read_png(dp, &dp->original_file, "ignored transforms", + dp->ignored_transforms); + + /* The result should be identical to the original_rows */ + if (!compare_read(dp, 0/*transforms applied*/)) + return; /* no point testing more */ + } + +#ifdef PNG_WRITE_PNG_SUPPORTED + /* Second test: write the original PNG data out to a new file (to test the + * write side) then read the result back in and make sure that it hasn't + * changed. + */ + dp->operation = "write"; + write_png(dp, dp->original_ip, 0/*transforms*/); + read_png(dp, &dp->written_file, NULL, 0/*transforms*/); + if (!compare_read(dp, 0/*transforms applied*/)) + return; +#endif + + /* Third test: the active options. Test each in turn, or, with the + * EXHAUSTIVE option, test all possible combinations. + */ + { + /* Use unsigned int here because the code below to increment through all + * the possibilities exhaustively has to use a compare and that must be + * unsigned, because some transforms are negative on a 16-bit system. + */ + unsigned int active = dp->active_transforms; + int exhaustive = (dp->options & EXHAUSTIVE) != 0; + unsigned int current = first_transform(active); + unsigned int bad_transforms = 0; + unsigned int bad_combo = ~0U; /* bitwise AND of failing transforms */ + unsigned int bad_combo_list = 0; /* bitwise OR of failures */ + + for (;;) + { + read_png(dp, &dp->original_file, "active transforms", current); + + /* If this involved any irreversible transformations then if we write + * it out with just the reversible transformations and read it in again + * with the same transforms we should get the same thing. At present + * this isn't done - it just seems like a waste of time and it would + * require two sets of read png_struct/png_info. + * + * If there were no irreversible transformations then if we write it + * out and read it back in again (without the reversible transforms) + * we should get back to the place where we started. + */ +#ifdef PNG_WRITE_PNG_SUPPORTED + if ((current & write_transforms) == current) + { + /* All transforms reversible: write the PNG with the transformations + * reversed, then read it back in with no transformations. The + * result should be the same as the original apart from the loss of + * low order bits because of the SHIFT/sBIT transform. + */ + dp->operation = "reversible transforms"; + write_png(dp, dp->read_ip, current); + + /* And if this is read back in, because all the transformations were + * reversible, the result should be the same. + */ + read_png(dp, &dp->written_file, NULL, 0); + if (!compare_read(dp, current/*for the SHIFT/sBIT transform*/)) + { + /* This set of transforms failed. If a single bit is set - if + * there is just one transform - don't include this in further + * 'exhaustive' tests. Notice that each transform is tested on + * its own before testing combos in the exhaustive case. + */ + if (is_combo(current)) + { + bad_combo &= current; + bad_combo_list |= current; + } + + else + bad_transforms |= current; + } + } +#endif + + /* Now move to the next transform */ + if (exhaustive) /* all combinations */ + { + unsigned int next = current; + + do + { + if (next == read_transforms) /* Everything tested */ + goto combo; + + ++next; + } /* skip known bad combos if the relevant option is set; skip + * combos involving known bad single transforms in all cases. + */ + while ( (next & read_transforms) <= current + || (next & active) == 0 /* skip cases that do nothing */ + || (next & bad_transforms) != 0 + || skip_transform(dp, next)); + + assert((next & read_transforms) == next); + current = next; + } + + else /* one at a time */ + { + active &= ~current; + + if (active == 0) + goto combo; + + current = first_transform(active); + } + } + +combo: + if (dp->options & FIND_BAD_COMBOS) + { + /* bad_combos identifies the combos that occur in all failing cases; + * bad_combo_list identifies transforms that do not prevent the + * failure. + */ + if (bad_combo != ~0U) + printf("%s[0x%x]: PROBLEM: 0x%x[0x%x] ANTIDOTE: 0x%x\n", + dp->filename, active, bad_combo, bad_combo_list, + rw_transforms & ~bad_combo_list); + + else + printf("%s: no %sbad combos found\n", dp->filename, + (dp->options & SKIP_BUGS) ? "additional " : ""); + } + } +} + +static int +do_test(struct display *dp, const char *file) + /* Exists solely to isolate the setjmp clobbers */ +{ + int ret = setjmp(dp->error_return); + + if (ret == 0) + { + test_one_file(dp, file); + return 0; + } + + else if (ret < ERRORS) /* shouldn't longjmp on warnings */ + display_log(dp, INTERNAL_ERROR, "unexpected return code %d", ret); + + return ret; +} + +int +main(int argc, char **argv) +{ + /* For each file on the command line test it with a range of transforms */ + int option_end, ilog = 0; + struct display d; + + validate_T(); + display_init(&d); + + for (option_end=1; option_end QUIET) /* abort on user or internal error */ + return 99; + } + + /* Here on any return, including failures, except user/internal issues + */ + { + int pass = (d.options & STRICT) ? + RESULT_STRICT(d.results) : RESULT_RELAXED(d.results); + + if (!pass) + ++errors; + + if (d.options & LOG) + { + int j; + + printf("%s: pngimage ", pass ? "PASS" : "FAIL"); + + for (j=1; j +#include +#include +#include +#include +#include +#include + +#if defined(HAVE_CONFIG_H) && !defined(PNG_NO_CONFIG_H) +# include +#endif + +/* Define the following to use this test against your installed libpng, rather + * than the one being built here: + */ +#ifdef PNG_FREESTANDING_TESTS +# include +#else +# include "../../png.h" +#endif + +/* 1.6.1 added support for the configure test harness, which uses 77 to indicate + * a skipped test, in earlier versions we need to succeed on a skipped test, so: + */ +#if PNG_LIBPNG_VER >= 10601 && defined(HAVE_CONFIG_H) +# define SKIP 77 +#else +# define SKIP 0 +#endif + +#ifdef PNG_SIMPLIFIED_READ_SUPPORTED /* Else nothing can be done */ +#include "../tools/sRGB.h" + +/* KNOWN ISSUES + * + * These defines switch on alternate algorithms for format conversions to match + * the current libpng implementation; they are set to allow pngstest to pass + * even though libpng is producing answers that are not as correct as they + * should be. + */ +#define ALLOW_UNUSED_GPC 0 + /* If true include unused static GPC functions and declare an external array + * of them to hide the fact that they are unused. This is for development + * use while testing the correct function to use to take into account libpng + * misbehavior, such as using a simple power law to correct sRGB to linear. + */ + +/* The following is to support direct compilation of this file as C++ */ +#ifdef __cplusplus +# define voidcast(type, value) static_cast(value) +# define aligncastconst(type, value) \ + static_cast(static_cast(value)) +#else +# define voidcast(type, value) (value) +# define aligncastconst(type, value) ((const void*)(value)) +#endif /* __cplusplus */ + +/* During parallel runs of pngstest each temporary file needs a unique name, + * this is used to permit uniqueness using a command line argument which can be + * up to 22 characters long. + */ +static char tmpf[23] = "TMP"; + +/* Generate random bytes. This uses a boring repeatable algorithm and it + * is implemented here so that it gives the same set of numbers on every + * architecture. It's a linear congruential generator (Knuth or Sedgewick + * "Algorithms") but it comes from the 'feedback taps' table in Horowitz and + * Hill, "The Art of Electronics". + */ +static void +make_random_bytes(png_uint_32* seed, void* pv, size_t size) +{ + png_uint_32 u0 = seed[0], u1 = seed[1]; + png_bytep bytes = voidcast(png_bytep, pv); + + /* There are thirty three bits, the next bit in the sequence is bit-33 XOR + * bit-20. The top 1 bit is in u1, the bottom 32 are in u0. + */ + size_t i; + for (i=0; i> (20-8)) ^ ((u1 << 7) | (u0 >> (32-7)))) & 0xff; + u1 <<= 8; + u1 |= u0 >> 24; + u0 <<= 8; + u0 |= u; + *bytes++ = (png_byte)u; + } + + seed[0] = u0; + seed[1] = u1; +} + +static png_uint_32 color_seed[2]; + +static void +reseed(void) +{ + color_seed[0] = 0x12345678U; + color_seed[1] = 0x9abcdefU; +} + +static void +random_color(png_colorp color) +{ + make_random_bytes(color_seed, color, sizeof *color); +} + +/* Math support - neither Cygwin nor Visual Studio have C99 support and we need + * a predictable rounding function, so make one here: + */ +static double +closestinteger(double x) +{ + return floor(x + .5); +} + +/* Cast support: remove GCC whines. */ +static png_byte +u8d(double d) +{ + d = closestinteger(d); + return (png_byte)d; +} + +static png_uint_16 +u16d(double d) +{ + d = closestinteger(d); + return (png_uint_16)d; +} + +/* sRGB support: use exact calculations rounded to the nearest int, see the + * fesetround() call in main(). sRGB_to_d optimizes the 8 to 16-bit conversion. + */ +static double sRGB_to_d[256]; +static double g22_to_d[256]; + +static void +init_sRGB_to_d(void) +{ + int i; + + sRGB_to_d[0] = 0; + for (i=1; i<255; ++i) + sRGB_to_d[i] = linear_from_sRGB(i/255.); + sRGB_to_d[255] = 1; + + g22_to_d[0] = 0; + for (i=1; i<255; ++i) + g22_to_d[i] = pow(i/255., 1/.45455); + g22_to_d[255] = 1; +} + +static png_byte +sRGB(double linear /*range 0.0 .. 1.0*/) +{ + return u8d(255 * sRGB_from_linear(linear)); +} + +static png_byte +isRGB(int fixed_linear) +{ + return sRGB(fixed_linear / 65535.); +} + +#if 0 /* not used */ +static png_byte +unpremultiply(int component, int alpha) +{ + if (alpha <= component) + return 255; /* Arbitrary, but consistent with the libpng code */ + + else if (alpha >= 65535) + return isRGB(component); + + else + return sRGB((double)component / alpha); +} +#endif + +static png_uint_16 +ilinear(int fixed_srgb) +{ + return u16d(65535 * sRGB_to_d[fixed_srgb]); +} + +static png_uint_16 +ilineara(int fixed_srgb, int alpha) +{ + return u16d((257 * alpha) * sRGB_to_d[fixed_srgb]); +} + +static png_uint_16 +ilinear_g22(int fixed_srgb) +{ + return u16d(65535 * g22_to_d[fixed_srgb]); +} + +#if ALLOW_UNUSED_GPC +static png_uint_16 +ilineara_g22(int fixed_srgb, int alpha) +{ + return u16d((257 * alpha) * g22_to_d[fixed_srgb]); +} +#endif + +static double +YfromRGBint(int ir, int ig, int ib) +{ + double r = ir; + double g = ig; + double b = ib; + return YfromRGB(r, g, b); +} + +#if 0 /* unused */ +/* The error that results from using a 2.2 power law in place of the correct + * sRGB transform, given an 8-bit value which might be either sRGB or power-law. + */ +static int +power_law_error8(int value) +{ + if (value > 0 && value < 255) + { + double vd = value / 255.; + double e = fabs( + pow(sRGB_to_d[value], 1/2.2) - sRGB_from_linear(pow(vd, 2.2))); + + /* Always allow an extra 1 here for rounding errors */ + e = 1+floor(255 * e); + return (int)e; + } + + return 0; +} + +static int error_in_sRGB_roundtrip = 56; /* by experiment */ +static int +power_law_error16(int value) +{ + if (value > 0 && value < 65535) + { + /* Round trip the value through an 8-bit representation but using + * non-matching to/from conversions. + */ + double vd = value / 65535.; + double e = fabs( + pow(sRGB_from_linear(vd), 2.2) - linear_from_sRGB(pow(vd, 1/2.2))); + + /* Always allow an extra 1 here for rounding errors */ + e = error_in_sRGB_roundtrip+floor(65535 * e); + return (int)e; + } + + return 0; +} + +static int +compare_8bit(int v1, int v2, int error_limit, int multiple_algorithms) +{ + int e = abs(v1-v2); + int ev1, ev2; + + if (e <= error_limit) + return 1; + + if (!multiple_algorithms) + return 0; + + ev1 = power_law_error8(v1); + if (e <= ev1) + return 1; + + ev2 = power_law_error8(v2); + if (e <= ev2) + return 1; + + return 0; +} + +static int +compare_16bit(int v1, int v2, int error_limit, int multiple_algorithms) +{ + int e = abs(v1-v2); + int ev1, ev2; + + if (e <= error_limit) + return 1; + + /* "multiple_algorithms" in this case means that a color-map has been + * involved somewhere, so we can deduce that the values were forced to 8-bit + * (like the via_linear case for 8-bit.) + */ + if (!multiple_algorithms) + return 0; + + ev1 = power_law_error16(v1); + if (e <= ev1) + return 1; + + ev2 = power_law_error16(v2); + if (e <= ev2) + return 1; + + return 0; +} +#endif /* unused */ + +#define USE_FILE 1 /* else memory */ +#define USE_STDIO 2 /* else use file name */ +#define STRICT 4 /* fail on warnings too */ +#define VERBOSE 8 +#define KEEP_TMPFILES 16 /* else delete temporary files */ +#define KEEP_GOING 32 +#define ACCUMULATE 64 +#define FAST_WRITE 128 +#define sRGB_16BIT 256 +#define NO_RESEED 512 /* do not reseed on each new file */ +#define GBG_ERROR 1024 /* do not ignore the gamma+background_rgb_to_gray + * libpng warning. */ + +static void +print_opts(png_uint_32 opts) +{ + if (opts & USE_FILE) + printf(" --file"); + if (opts & USE_STDIO) + printf(" --stdio"); + if (!(opts & STRICT)) + printf(" --nostrict"); + if (opts & VERBOSE) + printf(" --verbose"); + if (opts & KEEP_TMPFILES) + printf(" --preserve"); + if (opts & KEEP_GOING) + printf(" --keep-going"); + if (opts & ACCUMULATE) + printf(" --accumulate"); + if (!(opts & FAST_WRITE)) /* --fast is currently the default */ + printf(" --slow"); + if (opts & sRGB_16BIT) + printf(" --sRGB-16bit"); + if (opts & NO_RESEED) + printf(" --noreseed"); +#if PNG_LIBPNG_VER < 10700 /* else on by default */ + if (opts & GBG_ERROR) + printf(" --fault-gbg-warning"); +#endif +} + +#define FORMAT_NO_CHANGE 0x80000000 /* additional flag */ + +/* A name table for all the formats - defines the format of the '+' arguments to + * pngstest. + */ +#define FORMAT_COUNT 64 +#define FORMAT_MASK 0x3f +static const char * const format_names[FORMAT_COUNT] = +{ + "sRGB-gray", + "sRGB-gray+alpha", + "sRGB-rgb", + "sRGB-rgb+alpha", + "linear-gray", + "linear-gray+alpha", + "linear-rgb", + "linear-rgb+alpha", + + "color-mapped-sRGB-gray", + "color-mapped-sRGB-gray+alpha", + "color-mapped-sRGB-rgb", + "color-mapped-sRGB-rgb+alpha", + "color-mapped-linear-gray", + "color-mapped-linear-gray+alpha", + "color-mapped-linear-rgb", + "color-mapped-linear-rgb+alpha", + + "sRGB-gray", + "sRGB-gray+alpha", + "sRGB-bgr", + "sRGB-bgr+alpha", + "linear-gray", + "linear-gray+alpha", + "linear-bgr", + "linear-bgr+alpha", + + "color-mapped-sRGB-gray", + "color-mapped-sRGB-gray+alpha", + "color-mapped-sRGB-bgr", + "color-mapped-sRGB-bgr+alpha", + "color-mapped-linear-gray", + "color-mapped-linear-gray+alpha", + "color-mapped-linear-bgr", + "color-mapped-linear-bgr+alpha", + + "sRGB-gray", + "alpha+sRGB-gray", + "sRGB-rgb", + "alpha+sRGB-rgb", + "linear-gray", + "alpha+linear-gray", + "linear-rgb", + "alpha+linear-rgb", + + "color-mapped-sRGB-gray", + "color-mapped-alpha+sRGB-gray", + "color-mapped-sRGB-rgb", + "color-mapped-alpha+sRGB-rgb", + "color-mapped-linear-gray", + "color-mapped-alpha+linear-gray", + "color-mapped-linear-rgb", + "color-mapped-alpha+linear-rgb", + + "sRGB-gray", + "alpha+sRGB-gray", + "sRGB-bgr", + "alpha+sRGB-bgr", + "linear-gray", + "alpha+linear-gray", + "linear-bgr", + "alpha+linear-bgr", + + "color-mapped-sRGB-gray", + "color-mapped-alpha+sRGB-gray", + "color-mapped-sRGB-bgr", + "color-mapped-alpha+sRGB-bgr", + "color-mapped-linear-gray", + "color-mapped-alpha+linear-gray", + "color-mapped-linear-bgr", + "color-mapped-alpha+linear-bgr", +}; + +/* Decode an argument to a format number. */ +static png_uint_32 +formatof(const char *arg) +{ + char *ep; + unsigned long format = strtoul(arg, &ep, 0); + + if (ep > arg && *ep == 0 && format < FORMAT_COUNT) + return (png_uint_32)format; + + else for (format=0; format < FORMAT_COUNT; ++format) + { + if (strcmp(format_names[format], arg) == 0) + return (png_uint_32)format; + } + + fprintf(stderr, "pngstest: format name '%s' invalid\n", arg); + return FORMAT_COUNT; +} + +/* Bitset/test functions for formats */ +#define FORMAT_SET_COUNT (FORMAT_COUNT / 32) +typedef struct +{ + png_uint_32 bits[FORMAT_SET_COUNT]; +} +format_list; + +static void format_init(format_list *pf) +{ + int i; + for (i=0; ibits[i] = 0; /* All off */ +} + +#if 0 /* currently unused */ +static void format_clear(format_list *pf) +{ + int i; + for (i=0; ibits[i] = 0; +} +#endif + +static int format_is_initial(format_list *pf) +{ + int i; + for (i=0; ibits[i] != 0) + return 0; + + return 1; +} + +static int format_set(format_list *pf, png_uint_32 format) +{ + if (format < FORMAT_COUNT) + return pf->bits[format >> 5] |= ((png_uint_32)1) << (format & 31); + + return 0; +} + +#if 0 /* currently unused */ +static int format_unset(format_list *pf, png_uint_32 format) +{ + if (format < FORMAT_COUNT) + return pf->bits[format >> 5] &= ~((png_uint_32)1) << (format & 31); + + return 0; +} +#endif + +static int format_isset(format_list *pf, png_uint_32 format) +{ + return format < FORMAT_COUNT && + (pf->bits[format >> 5] & (((png_uint_32)1) << (format & 31))) != 0; +} + +static void format_default(format_list *pf, int redundant) +{ + if (redundant) + { + int i; + + /* set everything, including flags that are pointless */ + for (i=0; ibits[i] = ~(png_uint_32)0; + } + + else + { + png_uint_32 f; + + for (f=0; finput_file != NULL) + rewind(image->input_file); +} + +/* Free the image buffer; the buffer is re-used on a re-read, this is just for + * cleanup. + */ +static void +freebuffer(Image *image) +{ + if (image->buffer) free(image->buffer); + image->buffer = NULL; + image->bufsize = 0; + image->allocsize = 0; +} + +/* Delete function; cleans out all the allocated data and the temporary file in + * the image. + */ +static void +freeimage(Image *image) +{ + freebuffer(image); + png_image_free(&image->image); + + if (image->input_file != NULL) + { + fclose(image->input_file); + image->input_file = NULL; + } + + if (image->input_memory != NULL) + { + free(image->input_memory); + image->input_memory = NULL; + image->input_memory_size = 0; + } + + if (image->tmpfile_name[0] != 0 && (image->opts & KEEP_TMPFILES) == 0) + { + (void)remove(image->tmpfile_name); + image->tmpfile_name[0] = 0; + } +} + +/* This is actually a re-initializer; allows an image structure to be re-used by + * freeing everything that relates to an old image. + */ +static void initimage(Image *image, png_uint_32 opts, const char *file_name, + int stride_extra) +{ + freeimage(image); + memset(&image->image, 0, sizeof image->image); + image->opts = opts; + image->file_name = file_name; + image->stride_extra = stride_extra; +} + +/* Make sure the image buffer is big enough; allows re-use of the buffer if the + * image is re-read. + */ +#define BUFFER_INIT8 73 +static void +allocbuffer(Image *image) +{ + size_t size = PNG_IMAGE_BUFFER_SIZE(image->image, image->stride); + + if (size+32 > image->bufsize) + { + freebuffer(image); + image->buffer = voidcast(png_bytep, malloc(size+32)); + if (image->buffer == NULL) + { + fflush(stdout); + fprintf(stderr, + "simpletest: out of memory allocating %lu(+32) byte buffer\n", + (unsigned long)size); + exit(1); + } + image->bufsize = size+32; + } + + memset(image->buffer, 95, image->bufsize); + memset(image->buffer+16, BUFFER_INIT8, size); + image->allocsize = size; +} + +/* Make sure 16 bytes match the given byte. */ +static int +check16(png_const_bytep bp, int b) +{ + int i = 16; + + do + if (*bp != b) return 1; + while (--i); + + return 0; +} + +/* Check for overwrite in the image buffer. */ +static void +checkbuffer(Image *image, const char *arg) +{ + if (check16(image->buffer, 95)) + { + fflush(stdout); + fprintf(stderr, "%s: overwrite at start of image buffer\n", arg); + exit(1); + } + + if (check16(image->buffer+16+image->allocsize, 95)) + { + fflush(stdout); + fprintf(stderr, "%s: overwrite at end of image buffer\n", arg); + exit(1); + } +} + +/* ERROR HANDLING */ +/* Log a terminal error, also frees the libpng part of the image if necessary. + */ +static int +logerror(Image *image, const char *a1, const char *a2, const char *a3) +{ + fflush(stdout); + if (image->image.warning_or_error) + fprintf(stderr, "%s%s%s: %s\n", a1, a2, a3, image->image.message); + + else + fprintf(stderr, "%s%s%s\n", a1, a2, a3); + + if (image->image.opaque != NULL) + { + fprintf(stderr, "%s: image opaque pointer non-NULL on error\n", + image->file_name); + png_image_free(&image->image); + } + + return 0; +} + +/* Log an error and close a file (just a utility to do both things in one + * function call.) + */ +static int +logclose(Image *image, FILE *f, const char *name, const char *operation) +{ + int e = errno; + + fclose(f); + return logerror(image, name, operation, strerror(e)); +} + +/* Make sure the png_image has been freed - validates that libpng is doing what + * the spec says and freeing the image. + */ +static int +checkopaque(Image *image) +{ + if (image->image.opaque != NULL) + { + png_image_free(&image->image); + return logerror(image, image->file_name, ": opaque not NULL", ""); + } + + /* Separate out the gamma+background_rgb_to_gray warning because it may + * produce opaque component errors: + */ + else if (image->image.warning_or_error != 0 && + (strcmp(image->image.message, + "libpng does not support gamma+background+rgb_to_gray") == 0 ? + (image->opts & GBG_ERROR) != 0 : (image->opts & STRICT) != 0)) + return logerror(image, image->file_name, (image->opts & GBG_ERROR) != 0 ? + " --fault-gbg-warning" : " --strict", ""); + + else + return 1; +} + +/* IMAGE COMPARISON/CHECKING */ +/* Compare the pixels of two images, which should be the same but aren't. The + * images must have been checked for a size match. + */ +typedef struct +{ + /* The components, for grayscale images the gray value is in 'g' and if alpha + * is not present 'a' is set to 255 or 65535 according to format. + */ + int r, g, b, a; +} Pixel; + +typedef struct +{ + /* The background as the original sRGB 8-bit value converted to the final + * integer format and as a double precision linear value in the range 0..1 + * for with partially transparent pixels. + */ + int ir, ig, ib; + double dr, dg, db; /* linear r,g,b scaled to 0..1 */ +} Background; + +/* Basic image formats; control the data but not the layout thereof. */ +#define BASE_FORMATS\ + (PNG_FORMAT_FLAG_ALPHA|PNG_FORMAT_FLAG_COLOR|PNG_FORMAT_FLAG_LINEAR) + +/* Read a Pixel from a buffer. The code below stores the correct routine for + * the format in a function pointer, these are the routines: + */ +static void +gp_g8(Pixel *p, png_const_voidp pb) +{ + png_const_bytep pp = voidcast(png_const_bytep, pb); + + p->r = p->g = p->b = pp[0]; + p->a = 255; +} + +static void +gp_ga8(Pixel *p, png_const_voidp pb) +{ + png_const_bytep pp = voidcast(png_const_bytep, pb); + + p->r = p->g = p->b = pp[0]; + p->a = pp[1]; +} + +#ifdef PNG_FORMAT_AFIRST_SUPPORTED +static void +gp_ag8(Pixel *p, png_const_voidp pb) +{ + png_const_bytep pp = voidcast(png_const_bytep, pb); + + p->r = p->g = p->b = pp[1]; + p->a = pp[0]; +} +#endif + +static void +gp_rgb8(Pixel *p, png_const_voidp pb) +{ + png_const_bytep pp = voidcast(png_const_bytep, pb); + + p->r = pp[0]; + p->g = pp[1]; + p->b = pp[2]; + p->a = 255; +} + +#ifdef PNG_FORMAT_BGR_SUPPORTED +static void +gp_bgr8(Pixel *p, png_const_voidp pb) +{ + png_const_bytep pp = voidcast(png_const_bytep, pb); + + p->r = pp[2]; + p->g = pp[1]; + p->b = pp[0]; + p->a = 255; +} +#endif + +static void +gp_rgba8(Pixel *p, png_const_voidp pb) +{ + png_const_bytep pp = voidcast(png_const_bytep, pb); + + p->r = pp[0]; + p->g = pp[1]; + p->b = pp[2]; + p->a = pp[3]; +} + +#ifdef PNG_FORMAT_BGR_SUPPORTED +static void +gp_bgra8(Pixel *p, png_const_voidp pb) +{ + png_const_bytep pp = voidcast(png_const_bytep, pb); + + p->r = pp[2]; + p->g = pp[1]; + p->b = pp[0]; + p->a = pp[3]; +} +#endif + +#ifdef PNG_FORMAT_AFIRST_SUPPORTED +static void +gp_argb8(Pixel *p, png_const_voidp pb) +{ + png_const_bytep pp = voidcast(png_const_bytep, pb); + + p->r = pp[1]; + p->g = pp[2]; + p->b = pp[3]; + p->a = pp[0]; +} +#endif + +#if defined(PNG_FORMAT_AFIRST_SUPPORTED) && defined(PNG_FORMAT_BGR_SUPPORTED) +static void +gp_abgr8(Pixel *p, png_const_voidp pb) +{ + png_const_bytep pp = voidcast(png_const_bytep, pb); + + p->r = pp[3]; + p->g = pp[2]; + p->b = pp[1]; + p->a = pp[0]; +} +#endif + +static void +gp_g16(Pixel *p, png_const_voidp pb) +{ + png_const_uint_16p pp = voidcast(png_const_uint_16p, pb); + + p->r = p->g = p->b = pp[0]; + p->a = 65535; +} + +static void +gp_ga16(Pixel *p, png_const_voidp pb) +{ + png_const_uint_16p pp = voidcast(png_const_uint_16p, pb); + + p->r = p->g = p->b = pp[0]; + p->a = pp[1]; +} + +#ifdef PNG_FORMAT_AFIRST_SUPPORTED +static void +gp_ag16(Pixel *p, png_const_voidp pb) +{ + png_const_uint_16p pp = voidcast(png_const_uint_16p, pb); + + p->r = p->g = p->b = pp[1]; + p->a = pp[0]; +} +#endif + +static void +gp_rgb16(Pixel *p, png_const_voidp pb) +{ + png_const_uint_16p pp = voidcast(png_const_uint_16p, pb); + + p->r = pp[0]; + p->g = pp[1]; + p->b = pp[2]; + p->a = 65535; +} + +#ifdef PNG_FORMAT_BGR_SUPPORTED +static void +gp_bgr16(Pixel *p, png_const_voidp pb) +{ + png_const_uint_16p pp = voidcast(png_const_uint_16p, pb); + + p->r = pp[2]; + p->g = pp[1]; + p->b = pp[0]; + p->a = 65535; +} +#endif + +static void +gp_rgba16(Pixel *p, png_const_voidp pb) +{ + png_const_uint_16p pp = voidcast(png_const_uint_16p, pb); + + p->r = pp[0]; + p->g = pp[1]; + p->b = pp[2]; + p->a = pp[3]; +} + +#ifdef PNG_FORMAT_BGR_SUPPORTED +static void +gp_bgra16(Pixel *p, png_const_voidp pb) +{ + png_const_uint_16p pp = voidcast(png_const_uint_16p, pb); + + p->r = pp[2]; + p->g = pp[1]; + p->b = pp[0]; + p->a = pp[3]; +} +#endif + +#ifdef PNG_FORMAT_AFIRST_SUPPORTED +static void +gp_argb16(Pixel *p, png_const_voidp pb) +{ + png_const_uint_16p pp = voidcast(png_const_uint_16p, pb); + + p->r = pp[1]; + p->g = pp[2]; + p->b = pp[3]; + p->a = pp[0]; +} +#endif + +#if defined(PNG_FORMAT_AFIRST_SUPPORTED) && defined(PNG_FORMAT_BGR_SUPPORTED) +static void +gp_abgr16(Pixel *p, png_const_voidp pb) +{ + png_const_uint_16p pp = voidcast(png_const_uint_16p, pb); + + p->r = pp[3]; + p->g = pp[2]; + p->b = pp[1]; + p->a = pp[0]; +} +#endif + +/* Given a format, return the correct one of the above functions. */ +static void (* +get_pixel(png_uint_32 format))(Pixel *p, png_const_voidp pb) +{ + /* The color-map flag is irrelevant here - the caller of the function + * returned must either pass the buffer or, for a color-mapped image, the + * correct entry in the color-map. + */ + if (format & PNG_FORMAT_FLAG_LINEAR) + { + if (format & PNG_FORMAT_FLAG_COLOR) + { +# ifdef PNG_FORMAT_BGR_SUPPORTED + if (format & PNG_FORMAT_FLAG_BGR) + { + if (format & PNG_FORMAT_FLAG_ALPHA) + { +# ifdef PNG_FORMAT_AFIRST_SUPPORTED + if (format & PNG_FORMAT_FLAG_AFIRST) + return gp_abgr16; + + else +# endif + return gp_bgra16; + } + + else + return gp_bgr16; + } + + else +# endif + { + if (format & PNG_FORMAT_FLAG_ALPHA) + { +# ifdef PNG_FORMAT_AFIRST_SUPPORTED + if (format & PNG_FORMAT_FLAG_AFIRST) + return gp_argb16; + + else +# endif + return gp_rgba16; + } + + else + return gp_rgb16; + } + } + + else + { + if (format & PNG_FORMAT_FLAG_ALPHA) + { +# ifdef PNG_FORMAT_AFIRST_SUPPORTED + if (format & PNG_FORMAT_FLAG_AFIRST) + return gp_ag16; + + else +# endif + return gp_ga16; + } + + else + return gp_g16; + } + } + + else + { + if (format & PNG_FORMAT_FLAG_COLOR) + { +# ifdef PNG_FORMAT_BGR_SUPPORTED + if (format & PNG_FORMAT_FLAG_BGR) + { + if (format & PNG_FORMAT_FLAG_ALPHA) + { +# ifdef PNG_FORMAT_AFIRST_SUPPORTED + if (format & PNG_FORMAT_FLAG_AFIRST) + return gp_abgr8; + + else +# endif + return gp_bgra8; + } + + else + return gp_bgr8; + } + + else +# endif + { + if (format & PNG_FORMAT_FLAG_ALPHA) + { +# ifdef PNG_FORMAT_AFIRST_SUPPORTED + if (format & PNG_FORMAT_FLAG_AFIRST) + return gp_argb8; + + else +# endif + return gp_rgba8; + } + + else + return gp_rgb8; + } + } + + else + { + if (format & PNG_FORMAT_FLAG_ALPHA) + { +# ifdef PNG_FORMAT_AFIRST_SUPPORTED + if (format & PNG_FORMAT_FLAG_AFIRST) + return gp_ag8; + + else +# endif + return gp_ga8; + } + + else + return gp_g8; + } + } +} + +/* Conversion between pixel formats. The code above effectively eliminates the + * component ordering changes leaving three basic changes: + * + * 1) Remove an alpha channel by pre-multiplication or compositing on a + * background color. (Adding an alpha channel is a no-op.) + * + * 2) Remove color by mapping to grayscale. (Grayscale to color is a no-op.) + * + * 3) Convert between 8-bit and 16-bit components. (Both directtions are + * relevant.) + * + * This gives the following base format conversion matrix: + * + * OUT: ----- 8-bit ----- ----- 16-bit ----- + * IN G GA RGB RGBA G GA RGB RGBA + * 8 G . . . . lin lin lin lin + * 8 GA bckg . bckc . pre' pre pre' pre + * 8 RGB g8 g8 . . glin glin lin lin + * 8 RGBA g8b g8 bckc . gpr' gpre pre' pre + * 16 G sRGB sRGB sRGB sRGB . . . . + * 16 GA b16g unpg b16c unpc A . A . + * 16 RGB sG sG sRGB sRGB g16 g16 . . + * 16 RGBA gb16 sGp cb16 sCp g16 g16' A . + * + * 8-bit to 8-bit: + * bckg: composite on gray background + * bckc: composite on color background + * g8: convert sRGB components to sRGB grayscale + * g8b: convert sRGB components to grayscale and composite on gray background + * + * 8-bit to 16-bit: + * lin: make sRGB components linear, alpha := 65535 + * pre: make sRGB components linear and premultiply by alpha (scale alpha) + * pre': as 'pre' but alpha := 65535 + * glin: make sRGB components linear, convert to grayscale, alpha := 65535 + * gpre: make sRGB components grayscale and linear and premultiply by alpha + * gpr': as 'gpre' but alpha := 65535 + * + * 16-bit to 8-bit: + * sRGB: convert linear components to sRGB, alpha := 255 + * unpg: unpremultiply gray component and convert to sRGB (scale alpha) + * unpc: unpremultiply color components and convert to sRGB (scale alpha) + * b16g: composite linear onto gray background and convert the result to sRGB + * b16c: composite linear onto color background and convert the result to sRGB + * sG: convert linear RGB to sRGB grayscale + * sGp: unpremultiply RGB then convert to sRGB grayscale + * sCp: unpremultiply RGB then convert to sRGB + * gb16: composite linear onto background and convert to sRGB grayscale + * (order doesn't matter, the composite and grayscale operations permute) + * cb16: composite linear onto background and convert to sRGB + * + * 16-bit to 16-bit: + * A: set alpha to 65535 + * g16: convert linear RGB to linear grayscale (alpha := 65535) + * g16': as 'g16' but alpha is unchanged + */ +/* Simple copy: */ +static void +gpc_noop(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + out->r = in->r; + out->g = in->g; + out->b = in->b; + out->a = in->a; +} + +#if ALLOW_UNUSED_GPC +static void +gpc_nop8(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + if (in->a == 0) + out->r = out->g = out->b = 255; + + else + { + out->r = in->r; + out->g = in->g; + out->b = in->b; + } + + out->a = in->a; +} +#endif + +#if ALLOW_UNUSED_GPC +static void +gpc_nop6(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + if (in->a == 0) + out->r = out->g = out->b = 65535; + + else + { + out->r = in->r; + out->g = in->g; + out->b = in->b; + } + + out->a = in->a; +} +#endif + +/* 8-bit to 8-bit conversions */ +/* bckg: composite on gray background */ +static void +gpc_bckg(Pixel *out, const Pixel *in, const Background *back) +{ + if (in->a <= 0) + out->r = out->g = out->b = back->ig; + + else if (in->a >= 255) + out->r = out->g = out->b = in->g; + + else + { + double a = in->a / 255.; + + out->r = out->g = out->b = sRGB(sRGB_to_d[in->g] * a + back->dg * (1-a)); + } + + out->a = 255; +} + +/* bckc: composite on color background */ +static void +gpc_bckc(Pixel *out, const Pixel *in, const Background *back) +{ + if (in->a <= 0) + { + out->r = back->ir; + out->g = back->ig; + out->b = back->ib; + } + + else if (in->a >= 255) + { + out->r = in->r; + out->g = in->g; + out->b = in->b; + } + + else + { + double a = in->a / 255.; + + out->r = sRGB(sRGB_to_d[in->r] * a + back->dr * (1-a)); + out->g = sRGB(sRGB_to_d[in->g] * a + back->dg * (1-a)); + out->b = sRGB(sRGB_to_d[in->b] * a + back->db * (1-a)); + } + + out->a = 255; +} + +/* g8: convert sRGB components to sRGB grayscale */ +static void +gpc_g8(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + if (in->r == in->g && in->g == in->b) + out->r = out->g = out->b = in->g; + + else + out->r = out->g = out->b = + sRGB(YfromRGB(sRGB_to_d[in->r], sRGB_to_d[in->g], sRGB_to_d[in->b])); + + out->a = in->a; +} + +/* g8b: convert sRGB components to grayscale and composite on gray background */ +static void +gpc_g8b(Pixel *out, const Pixel *in, const Background *back) +{ + if (in->a <= 0) + out->r = out->g = out->b = back->ig; + + else if (in->a >= 255) + { + if (in->r == in->g && in->g == in->b) + out->r = out->g = out->b = in->g; + + else + out->r = out->g = out->b = sRGB(YfromRGB( + sRGB_to_d[in->r], sRGB_to_d[in->g], sRGB_to_d[in->b])); + } + + else + { + double a = in->a/255.; + + out->r = out->g = out->b = sRGB(a * YfromRGB(sRGB_to_d[in->r], + sRGB_to_d[in->g], sRGB_to_d[in->b]) + back->dg * (1-a)); + } + + out->a = 255; +} + +/* 8-bit to 16-bit conversions */ +/* lin: make sRGB components linear, alpha := 65535 */ +static void +gpc_lin(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + out->r = ilinear(in->r); + + if (in->g == in->r) + { + out->g = out->r; + + if (in->b == in->r) + out->b = out->r; + + else + out->b = ilinear(in->b); + } + + else + { + out->g = ilinear(in->g); + + if (in->b == in->r) + out->b = out->r; + + else if (in->b == in->g) + out->b = out->g; + + else + out->b = ilinear(in->b); + } + + out->a = 65535; +} + +/* pre: make sRGB components linear and premultiply by alpha (scale alpha) */ +static void +gpc_pre(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + out->r = ilineara(in->r, in->a); + + if (in->g == in->r) + { + out->g = out->r; + + if (in->b == in->r) + out->b = out->r; + + else + out->b = ilineara(in->b, in->a); + } + + else + { + out->g = ilineara(in->g, in->a); + + if (in->b == in->r) + out->b = out->r; + + else if (in->b == in->g) + out->b = out->g; + + else + out->b = ilineara(in->b, in->a); + } + + out->a = in->a * 257; +} + +/* pre': as 'pre' but alpha := 65535 */ +static void +gpc_preq(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + out->r = ilineara(in->r, in->a); + + if (in->g == in->r) + { + out->g = out->r; + + if (in->b == in->r) + out->b = out->r; + + else + out->b = ilineara(in->b, in->a); + } + + else + { + out->g = ilineara(in->g, in->a); + + if (in->b == in->r) + out->b = out->r; + + else if (in->b == in->g) + out->b = out->g; + + else + out->b = ilineara(in->b, in->a); + } + + out->a = 65535; +} + +/* glin: make sRGB components linear, convert to grayscale, alpha := 65535 */ +static void +gpc_glin(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + if (in->r == in->g && in->g == in->b) + out->r = out->g = out->b = ilinear(in->g); + + else + out->r = out->g = out->b = u16d(65535 * + YfromRGB(sRGB_to_d[in->r], sRGB_to_d[in->g], sRGB_to_d[in->b])); + + out->a = 65535; +} + +/* gpre: make sRGB components grayscale and linear and premultiply by alpha */ +static void +gpc_gpre(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + if (in->r == in->g && in->g == in->b) + out->r = out->g = out->b = ilineara(in->g, in->a); + + else + out->r = out->g = out->b = u16d(in->a * 257 * + YfromRGB(sRGB_to_d[in->r], sRGB_to_d[in->g], sRGB_to_d[in->b])); + + out->a = 257 * in->a; +} + +/* gpr': as 'gpre' but alpha := 65535 */ +static void +gpc_gprq(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + if (in->r == in->g && in->g == in->b) + out->r = out->g = out->b = ilineara(in->g, in->a); + + else + out->r = out->g = out->b = u16d(in->a * 257 * + YfromRGB(sRGB_to_d[in->r], sRGB_to_d[in->g], sRGB_to_d[in->b])); + + out->a = 65535; +} + +/* 8-bit to 16-bit conversions for gAMA 45455 encoded values */ +/* Lin: make gAMA 45455 components linear, alpha := 65535 */ +static void +gpc_Lin(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + out->r = ilinear_g22(in->r); + + if (in->g == in->r) + { + out->g = out->r; + + if (in->b == in->r) + out->b = out->r; + + else + out->b = ilinear_g22(in->b); + } + + else + { + out->g = ilinear_g22(in->g); + + if (in->b == in->r) + out->b = out->r; + + else if (in->b == in->g) + out->b = out->g; + + else + out->b = ilinear_g22(in->b); + } + + out->a = 65535; +} + +#if ALLOW_UNUSED_GPC +/* Pre: make gAMA 45455 components linear and premultiply by alpha (scale alpha) + */ +static void +gpc_Pre(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + out->r = ilineara_g22(in->r, in->a); + + if (in->g == in->r) + { + out->g = out->r; + + if (in->b == in->r) + out->b = out->r; + + else + out->b = ilineara_g22(in->b, in->a); + } + + else + { + out->g = ilineara_g22(in->g, in->a); + + if (in->b == in->r) + out->b = out->r; + + else if (in->b == in->g) + out->b = out->g; + + else + out->b = ilineara_g22(in->b, in->a); + } + + out->a = in->a * 257; +} +#endif + +#if ALLOW_UNUSED_GPC +/* Pre': as 'Pre' but alpha := 65535 */ +static void +gpc_Preq(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + out->r = ilineara_g22(in->r, in->a); + + if (in->g == in->r) + { + out->g = out->r; + + if (in->b == in->r) + out->b = out->r; + + else + out->b = ilineara_g22(in->b, in->a); + } + + else + { + out->g = ilineara_g22(in->g, in->a); + + if (in->b == in->r) + out->b = out->r; + + else if (in->b == in->g) + out->b = out->g; + + else + out->b = ilineara_g22(in->b, in->a); + } + + out->a = 65535; +} +#endif + +#if ALLOW_UNUSED_GPC +/* Glin: make gAMA 45455 components linear, convert to grayscale, alpha := 65535 + */ +static void +gpc_Glin(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + if (in->r == in->g && in->g == in->b) + out->r = out->g = out->b = ilinear_g22(in->g); + + else + out->r = out->g = out->b = u16d(65535 * + YfromRGB(g22_to_d[in->r], g22_to_d[in->g], g22_to_d[in->b])); + + out->a = 65535; +} +#endif + +#if ALLOW_UNUSED_GPC +/* Gpre: make gAMA 45455 components grayscale and linear and premultiply by + * alpha. + */ +static void +gpc_Gpre(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + if (in->r == in->g && in->g == in->b) + out->r = out->g = out->b = ilineara_g22(in->g, in->a); + + else + out->r = out->g = out->b = u16d(in->a * 257 * + YfromRGB(g22_to_d[in->r], g22_to_d[in->g], g22_to_d[in->b])); + + out->a = 257 * in->a; +} +#endif + +#if ALLOW_UNUSED_GPC +/* Gpr': as 'Gpre' but alpha := 65535 */ +static void +gpc_Gprq(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + if (in->r == in->g && in->g == in->b) + out->r = out->g = out->b = ilineara_g22(in->g, in->a); + + else + out->r = out->g = out->b = u16d(in->a * 257 * + YfromRGB(g22_to_d[in->r], g22_to_d[in->g], g22_to_d[in->b])); + + out->a = 65535; +} +#endif + +/* 16-bit to 8-bit conversions */ +/* sRGB: convert linear components to sRGB, alpha := 255 */ +static void +gpc_sRGB(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + out->r = isRGB(in->r); + + if (in->g == in->r) + { + out->g = out->r; + + if (in->b == in->r) + out->b = out->r; + + else + out->b = isRGB(in->b); + } + + else + { + out->g = isRGB(in->g); + + if (in->b == in->r) + out->b = out->r; + + else if (in->b == in->g) + out->b = out->g; + + else + out->b = isRGB(in->b); + } + + out->a = 255; +} + +/* unpg: unpremultiply gray component and convert to sRGB (scale alpha) */ +static void +gpc_unpg(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + if (in->a <= 128) + { + out->r = out->g = out->b = 255; + out->a = 0; + } + + else + { + out->r = out->g = out->b = sRGB((double)in->g / in->a); + out->a = u8d(in->a / 257.); + } +} + +/* unpc: unpremultiply color components and convert to sRGB (scale alpha) */ +static void +gpc_unpc(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + if (in->a <= 128) + { + out->r = out->g = out->b = 255; + out->a = 0; + } + + else + { + out->r = sRGB((double)in->r / in->a); + out->g = sRGB((double)in->g / in->a); + out->b = sRGB((double)in->b / in->a); + out->a = u8d(in->a / 257.); + } +} + +/* b16g: composite linear onto gray background and convert the result to sRGB */ +static void +gpc_b16g(Pixel *out, const Pixel *in, const Background *back) +{ + if (in->a <= 0) + out->r = out->g = out->b = back->ig; + + else + { + double a = in->a/65535.; + double a1 = 1-a; + + a /= 65535; + out->r = out->g = out->b = sRGB(in->g * a + back->dg * a1); + } + + out->a = 255; +} + +/* b16c: composite linear onto color background and convert the result to sRGB*/ +static void +gpc_b16c(Pixel *out, const Pixel *in, const Background *back) +{ + if (in->a <= 0) + { + out->r = back->ir; + out->g = back->ig; + out->b = back->ib; + } + + else + { + double a = in->a/65535.; + double a1 = 1-a; + + a /= 65535; + out->r = sRGB(in->r * a + back->dr * a1); + out->g = sRGB(in->g * a + back->dg * a1); + out->b = sRGB(in->b * a + back->db * a1); + } + + out->a = 255; +} + +/* sG: convert linear RGB to sRGB grayscale */ +static void +gpc_sG(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + out->r = out->g = out->b = sRGB(YfromRGBint(in->r, in->g, in->b)/65535); + out->a = 255; +} + +/* sGp: unpremultiply RGB then convert to sRGB grayscale */ +static void +gpc_sGp(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + if (in->a <= 128) + { + out->r = out->g = out->b = 255; + out->a = 0; + } + + else + { + out->r = out->g = out->b = sRGB(YfromRGBint(in->r, in->g, in->b)/in->a); + out->a = u8d(in->a / 257.); + } +} + +/* sCp: unpremultiply RGB then convert to sRGB */ +static void +gpc_sCp(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + + if (in->a <= 128) + { + out->r = out->g = out->b = 255; + out->a = 0; + } + + else + { + out->r = sRGB((double)in->r / in->a); + out->g = sRGB((double)in->g / in->a); + out->b = sRGB((double)in->b / in->a); + out->a = u8d(in->a / 257.); + } +} + +/* gb16: composite linear onto background and convert to sRGB grayscale */ +/* (order doesn't matter, the composite and grayscale operations permute) */ +static void +gpc_gb16(Pixel *out, const Pixel *in, const Background *back) +{ + if (in->a <= 0) + out->r = out->g = out->b = back->ig; + + else if (in->a >= 65535) + out->r = out->g = out->b = isRGB(in->g); + + else + { + double a = in->a / 65535.; + double a1 = 1-a; + + a /= 65535; + out->r = out->g = out->b = sRGB(in->g * a + back->dg * a1); + } + + out->a = 255; +} + +/* cb16: composite linear onto background and convert to sRGB */ +static void +gpc_cb16(Pixel *out, const Pixel *in, const Background *back) +{ + if (in->a <= 0) + { + out->r = back->ir; + out->g = back->ig; + out->b = back->ib; + } + + else if (in->a >= 65535) + { + out->r = isRGB(in->r); + out->g = isRGB(in->g); + out->b = isRGB(in->b); + } + + else + { + double a = in->a / 65535.; + double a1 = 1-a; + + a /= 65535; + out->r = sRGB(in->r * a + back->dr * a1); + out->g = sRGB(in->g * a + back->dg * a1); + out->b = sRGB(in->b * a + back->db * a1); + } + + out->a = 255; +} + +/* 16-bit to 16-bit conversions */ +/* A: set alpha to 65535 */ +static void +gpc_A(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + out->r = in->r; + out->g = in->g; + out->b = in->b; + out->a = 65535; +} + +/* g16: convert linear RGB to linear grayscale (alpha := 65535) */ +static void +gpc_g16(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + out->r = out->g = out->b = u16d(YfromRGBint(in->r, in->g, in->b)); + out->a = 65535; +} + +/* g16': as 'g16' but alpha is unchanged */ +static void +gpc_g16q(Pixel *out, const Pixel *in, const Background *back) +{ + (void)back; + out->r = out->g = out->b = u16d(YfromRGBint(in->r, in->g, in->b)); + out->a = in->a; +} + +#if ALLOW_UNUSED_GPC +/* Unused functions (to hide them from GCC unused function warnings) */ +void (* const gpc_unused[]) + (Pixel *out, const Pixel *in, const Background *back) = +{ + gpc_Pre, gpc_Preq, gpc_Glin, gpc_Gpre, gpc_Gprq, gpc_nop8, gpc_nop6 +}; +#endif + +/* OUT: ----- 8-bit ----- ----- 16-bit ----- + * IN G GA RGB RGBA G GA RGB RGBA + * 8 G . . . . lin lin lin lin + * 8 GA bckg . bckc . pre' pre pre' pre + * 8 RGB g8 g8 . . glin glin lin lin + * 8 RGBA g8b g8 bckc . gpr' gpre pre' pre + * 16 G sRGB sRGB sRGB sRGB . . . . + * 16 GA b16g unpg b16c unpc A . A . + * 16 RGB sG sG sRGB sRGB g16 g16 . . + * 16 RGBA gb16 sGp cb16 sCp g16 g16' A . + * + * The matrix is held in an array indexed thus: + * + * gpc_fn[out_format & BASE_FORMATS][in_format & BASE_FORMATS]; + */ +/* This will produce a compile time error if the FORMAT_FLAG values don't + * match the above matrix! + */ +#if PNG_FORMAT_FLAG_ALPHA == 1 && PNG_FORMAT_FLAG_COLOR == 2 &&\ + PNG_FORMAT_FLAG_LINEAR == 4 +static void (* const gpc_fn[8/*in*/][8/*out*/]) + (Pixel *out, const Pixel *in, const Background *back) = +{ +/*out: G-8 GA-8 RGB-8 RGBA-8 G-16 GA-16 RGB-16 RGBA-16 */ + {gpc_noop,gpc_noop,gpc_noop,gpc_noop, gpc_Lin, gpc_Lin, gpc_Lin, gpc_Lin }, + {gpc_bckg,gpc_noop,gpc_bckc,gpc_noop, gpc_preq,gpc_pre, gpc_preq,gpc_pre }, + {gpc_g8, gpc_g8, gpc_noop,gpc_noop, gpc_glin,gpc_glin,gpc_lin, gpc_lin }, + {gpc_g8b, gpc_g8, gpc_bckc,gpc_noop, gpc_gprq,gpc_gpre,gpc_preq,gpc_pre }, + {gpc_sRGB,gpc_sRGB,gpc_sRGB,gpc_sRGB, gpc_noop,gpc_noop,gpc_noop,gpc_noop}, + {gpc_b16g,gpc_unpg,gpc_b16c,gpc_unpc, gpc_A, gpc_noop,gpc_A, gpc_noop}, + {gpc_sG, gpc_sG, gpc_sRGB,gpc_sRGB, gpc_g16, gpc_g16, gpc_noop,gpc_noop}, + {gpc_gb16,gpc_sGp, gpc_cb16,gpc_sCp, gpc_g16, gpc_g16q,gpc_A, gpc_noop} +}; + +/* The array is repeated for the cases where both the input and output are color + * mapped because then different algorithms are used. + */ +static void (* const gpc_fn_colormapped[8/*in*/][8/*out*/]) + (Pixel *out, const Pixel *in, const Background *back) = +{ +/*out: G-8 GA-8 RGB-8 RGBA-8 G-16 GA-16 RGB-16 RGBA-16 */ + {gpc_noop,gpc_noop,gpc_noop,gpc_noop, gpc_lin, gpc_lin, gpc_lin, gpc_lin }, + {gpc_bckg,gpc_noop,gpc_bckc,gpc_noop, gpc_preq,gpc_pre, gpc_preq,gpc_pre }, + {gpc_g8, gpc_g8, gpc_noop,gpc_noop, gpc_glin,gpc_glin,gpc_lin, gpc_lin }, + {gpc_g8b, gpc_g8, gpc_bckc,gpc_noop, gpc_gprq,gpc_gpre,gpc_preq,gpc_pre }, + {gpc_sRGB,gpc_sRGB,gpc_sRGB,gpc_sRGB, gpc_noop,gpc_noop,gpc_noop,gpc_noop}, + {gpc_b16g,gpc_unpg,gpc_b16c,gpc_unpc, gpc_A, gpc_noop,gpc_A, gpc_noop}, + {gpc_sG, gpc_sG, gpc_sRGB,gpc_sRGB, gpc_g16, gpc_g16, gpc_noop,gpc_noop}, + {gpc_gb16,gpc_sGp, gpc_cb16,gpc_sCp, gpc_g16, gpc_g16q,gpc_A, gpc_noop} +}; + +/* The error arrays record the error in the same matrix; 64 entries, however + * the different algorithms used in libpng for colormap and direct conversions + * mean that four separate matrices are used (for each combination of + * colormapped and direct.) + * + * In some cases the conversion between sRGB formats goes via a linear + * intermediate; an sRGB to linear conversion (as above) is followed by a simple + * linear to sRGB step with no other conversions. This is done by a separate + * error array from an arbitrary 'in' format to one of the four basic outputs + * (since final output is always sRGB not colormapped). + * + * These arrays may be modified if the --accumulate flag is set during the run; + * then instead of logging errors they are simply added in. + * + * The three entries are currently for transparent, partially transparent and + * opaque input pixel values. Notice that alpha should be exact in each case. + * + * Errors in alpha should only occur when converting from a direct format + * to a colormapped format, when alpha is effectively smashed (so large + * errors can occur.) There should be no error in the '0' and 'opaque' + * values. The fourth entry in the array is used for the alpha error (and it + * should always be zero for the 'via linear' case since this is never color + * mapped.) + * + * Mapping to a colormap smashes the colors, it is necessary to have separate + * values for these cases because they are much larger; it is very much + * impossible to obtain a reasonable result, these are held in + * gpc_error_to_colormap. + */ +#if PNG_FORMAT_FLAG_COLORMAP == 8 /* extra check also required */ +# include "pngstest-errors.h" /* machine generated */ +#endif /* COLORMAP flag check */ +#endif /* flag checks */ + +typedef struct +{ + /* Basic pixel information: */ + Image* in_image; /* Input image */ + const Image* out_image; /* Output image */ + + /* 'background' is the value passed to the gpc_ routines, it may be NULL if + * it should not be used (*this* program has an error if it crashes as a + * result!) + */ + Background background_color; + const Background* background; + + /* Precalculated values: */ + int in_opaque; /* Value of input alpha that is opaque */ + int is_palette; /* Sample values come from the palette */ + int accumulate; /* Accumulate component errors (don't log) */ + int output_8bit; /* Output is 8-bit (else 16-bit) */ + + void (*in_gp)(Pixel*, png_const_voidp); + void (*out_gp)(Pixel*, png_const_voidp); + + void (*transform)(Pixel *out, const Pixel *in, const Background *back); + /* A function to perform the required transform */ + + void (*from_linear)(Pixel *out, const Pixel *in, const Background *back); + /* For 'via_linear' transforms the final, from linear, step, else NULL */ + + png_uint_16 error[4]; + /* Three error values for transparent, partially transparent and opaque + * input pixels (in turn). + */ + + png_uint_16 *error_ptr; + /* Where these are stored in the static array (for 'accumulate') */ +} +Transform; + +/* Return a 'transform' as above for the given format conversion. */ +static void +transform_from_formats(Transform *result, Image *in_image, + const Image *out_image, png_const_colorp background, int via_linear) +{ + png_uint_32 in_format, out_format; + png_uint_32 in_base, out_base; + + memset(result, 0, sizeof *result); + + /* Store the original images for error messages */ + result->in_image = in_image; + result->out_image = out_image; + + in_format = in_image->image.format; + out_format = out_image->image.format; + + if (in_format & PNG_FORMAT_FLAG_LINEAR) + result->in_opaque = 65535; + else + result->in_opaque = 255; + + result->output_8bit = (out_format & PNG_FORMAT_FLAG_LINEAR) == 0; + + result->is_palette = 0; /* set by caller if required */ + result->accumulate = (in_image->opts & ACCUMULATE) != 0; + + /* The loaders (which need the ordering information) */ + result->in_gp = get_pixel(in_format); + result->out_gp = get_pixel(out_format); + + /* Remove the ordering information: */ + in_format &= BASE_FORMATS | PNG_FORMAT_FLAG_COLORMAP; + in_base = in_format & BASE_FORMATS; + out_format &= BASE_FORMATS | PNG_FORMAT_FLAG_COLORMAP; + out_base = out_format & BASE_FORMATS; + + if (via_linear) + { + /* Check for an error in this program: */ + if (out_format & (PNG_FORMAT_FLAG_LINEAR|PNG_FORMAT_FLAG_COLORMAP)) + { + fprintf(stderr, "internal transform via linear error 0x%x->0x%x\n", + in_format, out_format); + exit(1); + } + + result->transform = gpc_fn[in_base][out_base | PNG_FORMAT_FLAG_LINEAR]; + result->from_linear = gpc_fn[out_base | PNG_FORMAT_FLAG_LINEAR][out_base]; + result->error_ptr = gpc_error_via_linear[in_format][out_format]; + } + + else if (~in_format & out_format & PNG_FORMAT_FLAG_COLORMAP) + { + /* The input is not colormapped but the output is, the errors will + * typically be large (only the grayscale-no-alpha case permits preserving + * even 8-bit values.) + */ + result->transform = gpc_fn[in_base][out_base]; + result->from_linear = NULL; + result->error_ptr = gpc_error_to_colormap[in_base][out_base]; + } + + else + { + /* The caller handles the colormap->pixel value conversion, so the + * transform function just gets a pixel value, however because libpng + * currently contains a different implementation for mapping a colormap if + * both input and output are colormapped we need different conversion + * functions to deal with errors in the libpng implementation. + */ + if (in_format & out_format & PNG_FORMAT_FLAG_COLORMAP) + result->transform = gpc_fn_colormapped[in_base][out_base]; + else + result->transform = gpc_fn[in_base][out_base]; + result->from_linear = NULL; + result->error_ptr = gpc_error[in_format][out_format]; + } + + /* Follow the libpng simplified API rules to work out what to pass to the gpc + * routines as a background value, if one is not required pass NULL so that + * this program crashes in the even of a programming error. + */ + result->background = NULL; /* default: not required */ + + /* Rule 1: background only need be supplied if alpha is to be removed */ + if (in_format & ~out_format & PNG_FORMAT_FLAG_ALPHA) + { + /* The input value is 'NULL' to use the background and (otherwise) an sRGB + * background color (to use a solid color). The code above uses a fixed + * byte value, BUFFER_INIT8, for buffer even for 16-bit output. For + * linear (16-bit) output the sRGB background color is ignored; the + * composition is always on the background (so BUFFER_INIT8 * 257), except + * that for the colormap (i.e. linear colormapped output) black is used. + */ + result->background = &result->background_color; + + if (out_format & PNG_FORMAT_FLAG_LINEAR || via_linear) + { + if (out_format & PNG_FORMAT_FLAG_COLORMAP) + { + result->background_color.ir = + result->background_color.ig = + result->background_color.ib = 0; + result->background_color.dr = + result->background_color.dg = + result->background_color.db = 0; + } + + else + { + result->background_color.ir = + result->background_color.ig = + result->background_color.ib = BUFFER_INIT8 * 257; + result->background_color.dr = + result->background_color.dg = + result->background_color.db = 0; + } + } + + else /* sRGB output */ + { + if (background != NULL) + { + if (out_format & PNG_FORMAT_FLAG_COLOR) + { + result->background_color.ir = background->red; + result->background_color.ig = background->green; + result->background_color.ib = background->blue; + /* TODO: sometimes libpng uses the power law conversion here, how + * to handle this? + */ + result->background_color.dr = sRGB_to_d[background->red]; + result->background_color.dg = sRGB_to_d[background->green]; + result->background_color.db = sRGB_to_d[background->blue]; + } + + else /* grayscale: libpng only looks at 'g' */ + { + result->background_color.ir = + result->background_color.ig = + result->background_color.ib = background->green; + /* TODO: sometimes libpng uses the power law conversion here, how + * to handle this? + */ + result->background_color.dr = + result->background_color.dg = + result->background_color.db = sRGB_to_d[background->green]; + } + } + + else if ((out_format & PNG_FORMAT_FLAG_COLORMAP) == 0) + { + result->background_color.ir = + result->background_color.ig = + result->background_color.ib = BUFFER_INIT8; + /* TODO: sometimes libpng uses the power law conversion here, how + * to handle this? + */ + result->background_color.dr = + result->background_color.dg = + result->background_color.db = sRGB_to_d[BUFFER_INIT8]; + } + + /* Else the output is colormapped and a background color must be + * provided; if pngstest crashes then that is a bug in this program + * (though libpng should png_error as well.) + */ + else + result->background = NULL; + } + } + + if (result->background == NULL) + { + result->background_color.ir = + result->background_color.ig = + result->background_color.ib = -1; /* not used */ + result->background_color.dr = + result->background_color.dg = + result->background_color.db = 1E30; /* not used */ + } + + + /* Copy the error values into the Transform: */ + result->error[0] = result->error_ptr[0]; + result->error[1] = result->error_ptr[1]; + result->error[2] = result->error_ptr[2]; + result->error[3] = result->error_ptr[3]; +} + + +/* Compare two pixels. + * + * OLD error values: +static int error_to_linear = 811; * by experiment * +static int error_to_linear_grayscale = 424; * by experiment * +static int error_to_sRGB = 6; * by experiment * +static int error_to_sRGB_grayscale = 17; * libpng error by calculation + + 2 by experiment * +static int error_in_compose = 2; * by experiment * +static int error_in_premultiply = 1; + * + * The following is *just* the result of a round trip from 8-bit sRGB to linear + * then back to 8-bit sRGB when it is done by libpng. There are two problems: + * + * 1) libpng currently uses a 2.2 power law with no linear segment, this results + * in instability in the low values and even with 16-bit precision sRGB(1) ends + * up mapping to sRGB(0) as a result of rounding in the 16-bit representation. + * This gives an error of 1 in the handling of value 1 only. + * + * 2) libpng currently uses an intermediate 8-bit linear value in gamma + * correction of 8-bit values. This results in many more errors, the worse of + * which is mapping sRGB(14) to sRGB(0). + * + * The general 'error_via_linear' is more complex because of pre-multiplication, + * this compounds the 8-bit errors according to the alpha value of the pixel. + * As a result 256 values are pre-calculated for error_via_linear. + */ +#if 0 +static int error_in_libpng_gamma; +static int error_via_linear[256]; /* Indexed by 8-bit alpha */ + +static void +init_error_via_linear(void) +{ + int alpha; + + error_via_linear[0] = 255; /* transparent pixel */ + + for (alpha=1; alpha<=255; ++alpha) + { + /* 16-bit values less than 128.5 get rounded to 8-bit 0 and so the worst + * case error arises with 16-bit 128.5, work out what sRGB + * (non-associated) value generates 128.5; any value less than this is + * going to map to 0, so the worst error is floor(value). + * + * Note that errors are considerably higher (more than a factor of 2) + * because libpng uses a simple power law for sRGB data at present. + * + * Add .1 for arithmetic errors inside libpng. + */ + double v = floor(255*pow(.5/*(128.5 * 255 / 65535)*/ / alpha, 1/2.2)+.1); + + error_via_linear[alpha] = (int)v; + } + + /* This is actually 14.99, but, despite the closeness to 15, 14 seems to work + * ok in this case. + */ + error_in_libpng_gamma = 14; +} +#endif + +static void +print_pixel(char string[64], const Pixel *pixel, png_uint_32 format) +{ + switch (format & (PNG_FORMAT_FLAG_ALPHA|PNG_FORMAT_FLAG_COLOR)) + { + case 0: + sprintf(string, "%s(%d)", format_names[format], pixel->g); + break; + + case PNG_FORMAT_FLAG_ALPHA: + sprintf(string, "%s(%d,%d)", format_names[format], pixel->g, + pixel->a); + break; + + case PNG_FORMAT_FLAG_COLOR: + sprintf(string, "%s(%d,%d,%d)", format_names[format], + pixel->r, pixel->g, pixel->b); + break; + + case PNG_FORMAT_FLAG_COLOR|PNG_FORMAT_FLAG_ALPHA: + sprintf(string, "%s(%d,%d,%d,%d)", format_names[format], + pixel->r, pixel->g, pixel->b, pixel->a); + break; + + default: + sprintf(string, "invalid-format"); + break; + } +} + +static int +logpixel(const Transform *transform, png_uint_32 x, png_uint_32 y, + const Pixel *in, const Pixel *calc, const Pixel *out, const char *reason) +{ + png_uint_32 in_format = transform->in_image->image.format; + png_uint_32 out_format = transform->out_image->image.format; + + png_uint_32 back_format = out_format & ~PNG_FORMAT_FLAG_ALPHA; + const char *via_linear = ""; + + char pixel_in[64], pixel_calc[64], pixel_out[64], pixel_loc[64]; + char background_info[100]; + + print_pixel(pixel_in, in, in_format); + print_pixel(pixel_calc, calc, out_format); + print_pixel(pixel_out, out, out_format); + + if (transform->is_palette) + sprintf(pixel_loc, "palette: %lu", (unsigned long)y); + else + sprintf(pixel_loc, "%lu,%lu", (unsigned long)x, (unsigned long)y); + + if (transform->from_linear != NULL) + { + via_linear = " (via linear)"; + /* And as a result the *read* format which did any background processing + * was itself linear, so the background color information is also + * linear. + */ + back_format |= PNG_FORMAT_FLAG_LINEAR; + } + + if (transform->background != NULL) + { + Pixel back; + char pixel_back[64]; + + back.r = transform->background->ir; + back.g = transform->background->ig; + back.b = transform->background->ib; + back.a = -1; /* not used */ + + print_pixel(pixel_back, &back, back_format); + sprintf(background_info, " on background %s", pixel_back); + } + + else + background_info[0] = 0; + + if (transform->in_image->file_name != transform->out_image->file_name) + { + char error_buffer[512]; + sprintf(error_buffer, + "(%s) %s error%s:\n %s%s ->\n %s\n not: %s.\n" + "Use --preserve and examine: ", pixel_loc, reason, via_linear, + pixel_in, background_info, pixel_out, pixel_calc); + return logerror(transform->in_image, transform->in_image->file_name, + error_buffer, transform->out_image->file_name); + } + + else + { + char error_buffer[512]; + sprintf(error_buffer, + "(%s) %s error%s:\n %s%s ->\n %s\n not: %s.\n" + " The error happened when reading the original file with this format.", + pixel_loc, reason, via_linear, pixel_in, background_info, pixel_out, + pixel_calc); + return logerror(transform->in_image, transform->in_image->file_name, + error_buffer, ""); + } +} + +static int +cmppixel(Transform *transform, png_const_voidp in, png_const_voidp out, + png_uint_32 x, png_uint_32 y/*or palette index*/) +{ + int maxerr; + png_const_charp errmsg; + Pixel pixel_in, pixel_calc, pixel_out; + + transform->in_gp(&pixel_in, in); + + if (transform->from_linear == NULL) + transform->transform(&pixel_calc, &pixel_in, transform->background); + + else + { + transform->transform(&pixel_out, &pixel_in, transform->background); + transform->from_linear(&pixel_calc, &pixel_out, NULL); + } + + transform->out_gp(&pixel_out, out); + + /* Eliminate the case where the input and output values match exactly. */ + if (pixel_calc.a == pixel_out.a && pixel_calc.r == pixel_out.r && + pixel_calc.g == pixel_out.g && pixel_calc.b == pixel_out.b) + return 1; + + /* Eliminate the case where the output pixel is transparent and the output + * is 8-bit - any component values are valid. Don't check the input alpha + * here to also skip the 16-bit small alpha cases. + */ + if (transform->output_8bit && pixel_calc.a == 0 && pixel_out.a == 0) + return 1; + + /* Check for alpha errors first; an alpha error can damage the components too + * so avoid spurious checks on components if one is found. + */ + errmsg = NULL; + { + int err_a = abs(pixel_calc.a-pixel_out.a); + + if (err_a > transform->error[3]) + { + /* If accumulating check the components too */ + if (transform->accumulate) + transform->error[3] = (png_uint_16)err_a; + + else + errmsg = "alpha"; + } + } + + /* Now if *either* of the output alphas are 0 but alpha is within tolerance + * eliminate the 8-bit component comparison. + */ + if (errmsg == NULL && transform->output_8bit && + (pixel_calc.a == 0 || pixel_out.a == 0)) + return 1; + + if (errmsg == NULL) /* else just signal an alpha error */ + { + int err_r = abs(pixel_calc.r - pixel_out.r); + int err_g = abs(pixel_calc.g - pixel_out.g); + int err_b = abs(pixel_calc.b - pixel_out.b); + int limit; + + if ((err_r | err_g | err_b) == 0) + return 1; /* exact match */ + + /* Mismatch on a component, check the input alpha */ + if (pixel_in.a >= transform->in_opaque) + { + errmsg = "opaque component"; + limit = 2; /* opaque */ + } + + else if (pixel_in.a > 0) + { + errmsg = "alpha component"; + limit = 1; /* partially transparent */ + } + + else + { + errmsg = "transparent component (background)"; + limit = 0; /* transparent */ + } + + maxerr = err_r; + if (maxerr < err_g) maxerr = err_g; + if (maxerr < err_b) maxerr = err_b; + + if (maxerr <= transform->error[limit]) + return 1; /* within the error limits */ + + /* Handle a component mis-match; log it, just return an error code, or + * accumulate it. + */ + if (transform->accumulate) + { + transform->error[limit] = (png_uint_16)maxerr; + return 1; /* to cause the caller to keep going */ + } + } + + /* Failure to match and not accumulating, so the error must be logged. */ + return logpixel(transform, x, y, &pixel_in, &pixel_calc, &pixel_out, errmsg); +} + +static png_byte +component_loc(png_byte loc[4], png_uint_32 format) +{ + /* Given a format return the number of channels and the location of + * each channel. + * + * The mask 'loc' contains the component offset of the channels in the + * following order. Note that if 'format' is grayscale the entries 1-3 must + * all contain the location of the gray channel. + * + * 0: alpha + * 1: red or gray + * 2: green or gray + * 3: blue or gray + */ + png_byte channels; + + if (format & PNG_FORMAT_FLAG_COLOR) + { + channels = 3; + + loc[2] = 1; + +# ifdef PNG_FORMAT_BGR_SUPPORTED + if (format & PNG_FORMAT_FLAG_BGR) + { + loc[1] = 2; + loc[3] = 0; + } + + else +# endif + { + loc[1] = 0; + loc[3] = 2; + } + } + + else + { + channels = 1; + loc[1] = loc[2] = loc[3] = 0; + } + + if (format & PNG_FORMAT_FLAG_ALPHA) + { +# ifdef PNG_FORMAT_AFIRST_SUPPORTED + if (format & PNG_FORMAT_FLAG_AFIRST) + { + loc[0] = 0; + ++loc[1]; + ++loc[2]; + ++loc[3]; + } + + else +# endif + loc[0] = channels; + + ++channels; + } + + else + loc[0] = 4; /* not present */ + + return channels; +} + +/* Compare two images, the original 'a', which was written out then read back in + * to * give image 'b'. The formats may have been changed. + */ +static int +compare_two_images(Image *a, Image *b, int via_linear, + png_const_colorp background) +{ + ptrdiff_t stridea = a->stride; + ptrdiff_t strideb = b->stride; + png_const_bytep rowa = a->buffer+16; + png_const_bytep rowb = b->buffer+16; + png_uint_32 width = a->image.width; + png_uint_32 height = a->image.height; + png_uint_32 formata = a->image.format; + png_uint_32 formatb = b->image.format; + unsigned int a_sample = PNG_IMAGE_SAMPLE_SIZE(formata); + unsigned int b_sample = PNG_IMAGE_SAMPLE_SIZE(formatb); + int alpha_added, alpha_removed; + int bchannels; + png_uint_32 y; + Transform tr; + int btoa[4]={0,0,0,0}; + + /* This should never happen: */ + if (width != b->image.width || height != b->image.height) + return logerror(a, a->file_name, ": width x height changed: ", + b->file_name); + + /* Set up the background and the transform */ + transform_from_formats(&tr, a, b, background, via_linear); + + /* Find the first row and inter-row space. */ + if (!(formata & PNG_FORMAT_FLAG_COLORMAP) && + (formata & PNG_FORMAT_FLAG_LINEAR)) + stridea *= 2; + + if (!(formatb & PNG_FORMAT_FLAG_COLORMAP) && + (formatb & PNG_FORMAT_FLAG_LINEAR)) + strideb *= 2; + + if (stridea < 0) rowa += (height-1) * (-stridea); + if (strideb < 0) rowb += (height-1) * (-strideb); + + /* First shortcut the two colormap case by comparing the image data; if it + * matches then we expect the colormaps to match, although this is not + * absolutely necessary for an image match. If the colormaps fail to match + * then there is a problem in libpng. + */ + if (formata & formatb & PNG_FORMAT_FLAG_COLORMAP) + { + /* Only check colormap entries that actually exist; */ + png_const_bytep ppa, ppb; + int match; + png_byte in_use[256], amax = 0, bmax = 0; + + memset(in_use, 0, sizeof in_use); + + ppa = rowa; + ppb = rowb; + + /* Do this the slow way to accumulate the 'in_use' flags, don't break out + * of the loop until the end; this validates the color-mapped data to + * ensure all pixels are valid color-map indexes. + */ + for (y=0, match=1; y bmax) + bmax = bval; + + if (bval != aval) + match = 0; + + in_use[aval] = 1; + if (aval > amax) + amax = aval; + } + } + + /* If the buffers match then the colormaps must too. */ + if (match) + { + /* Do the color-maps match, entry by entry? Only check the 'in_use' + * entries. An error here should be logged as a color-map error. + */ + png_const_bytep a_cmap = (png_const_bytep)a->colormap; + png_const_bytep b_cmap = (png_const_bytep)b->colormap; + int result = 1; /* match by default */ + + /* This is used in logpixel to get the error message correct. */ + tr.is_palette = 1; + + for (y=0; y<256; ++y, a_cmap += a_sample, b_cmap += b_sample) + if (in_use[y]) + { + /* The colormap entries should be valid, but because libpng doesn't + * do any checking at present the original image may contain invalid + * pixel values. These cause an error here (at present) unless + * accumulating errors in which case the program just ignores them. + */ + if (y >= a->image.colormap_entries) + { + if ((a->opts & ACCUMULATE) == 0) + { + char pindex[9]; + sprintf(pindex, "%lu[%lu]", (unsigned long)y, + (unsigned long)a->image.colormap_entries); + logerror(a, a->file_name, ": bad pixel index: ", pindex); + } + result = 0; + } + + else if (y >= b->image.colormap_entries) + { + if ((b->opts & ACCUMULATE) == 0) + { + char pindex[9]; + sprintf(pindex, "%lu[%lu]", (unsigned long)y, + (unsigned long)b->image.colormap_entries); + logerror(b, b->file_name, ": bad pixel index: ", pindex); + } + result = 0; + } + + /* All the mismatches are logged here; there can only be 256! */ + else if (!cmppixel(&tr, a_cmap, b_cmap, 0, y)) + result = 0; + } + + /* If requested, copy the error values back from the Transform. */ + if (a->opts & ACCUMULATE) + { + tr.error_ptr[0] = tr.error[0]; + tr.error_ptr[1] = tr.error[1]; + tr.error_ptr[2] = tr.error[2]; + tr.error_ptr[3] = tr.error[3]; + result = 1; /* force a continue */ + } + + return result; + } + + /* else the image buffers don't match pixel-wise so compare sample values + * instead, but first validate that the pixel indexes are in range (but + * only if not accumulating, when the error is ignored.) + */ + else if ((a->opts & ACCUMULATE) == 0) + { +# ifdef __GNUC__ +# define BYTE_CHARS 20 /* 2^32: GCC sprintf warning */ +# else +# define BYTE_CHARS 3 /* 2^8: real maximum value */ +# endif + /* Check the original image first, + * TODO: deal with input images with bad pixel values? + */ + if (amax >= a->image.colormap_entries) + { + char pindex[3+2*BYTE_CHARS]; + sprintf(pindex, "%d[%u]", amax, + (png_byte)/*SAFE*/a->image.colormap_entries); + return logerror(a, a->file_name, ": bad pixel index: ", pindex); + } + + else if (bmax >= b->image.colormap_entries) + { + char pindex[3+2*BYTE_CHARS]; + sprintf(pindex, "%d[%u]", bmax, + (png_byte)/*SAFE*/b->image.colormap_entries); + return logerror(b, b->file_name, ": bad pixel index: ", pindex); + } + } + } + + /* We can directly compare pixel values without the need to use the read + * or transform support (i.e. a memory compare) if: + * + * 1) The bit depth has not changed. + * 2) RGB to grayscale has not been done (the reverse is ok; we just compare + * the three RGB values to the original grayscale.) + * 3) An alpha channel has not been removed from an 8-bit format, or the + * 8-bit alpha value of the pixel was 255 (opaque). + * + * If an alpha channel has been *added* then it must have the relevant opaque + * value (255 or 65535). + * + * The fist two the tests (in the order given above) (using the boolean + * equivalence !a && !b == !(a || b)) + */ + if (!(((formata ^ formatb) & PNG_FORMAT_FLAG_LINEAR) | + (formata & (formatb ^ PNG_FORMAT_FLAG_COLOR) & PNG_FORMAT_FLAG_COLOR))) + { + /* Was an alpha channel changed? */ + png_uint_32 alpha_changed = (formata ^ formatb) & PNG_FORMAT_FLAG_ALPHA; + + /* Was an alpha channel removed? (The third test.) If so the direct + * comparison is only possible if the input alpha is opaque. + */ + alpha_removed = (formata & alpha_changed) != 0; + + /* Was an alpha channel added? */ + alpha_added = (formatb & alpha_changed) != 0; + + /* The channels may have been moved between input and output, this finds + * out how, recording the result in the btoa array, which says where in + * 'a' to find each channel of 'b'. If alpha was added then btoa[alpha] + * ends up as 4 (and is not used.) + */ + { + int i; + png_byte aloc[4]; + png_byte bloc[4]; + + /* The following are used only if the formats match, except that + * 'bchannels' is a flag for matching formats. btoa[x] says, for each + * channel in b, where to find the corresponding value in a, for the + * bchannels. achannels may be different for a gray to rgb transform + * (a will be 1 or 2, b will be 3 or 4 channels.) + */ + (void)component_loc(aloc, formata); + bchannels = component_loc(bloc, formatb); + + /* Hence the btoa array. */ + for (i=0; i<4; ++i) if (bloc[i] < 4) + btoa[bloc[i]] = aloc[i]; /* may be '4' for alpha */ + + if (alpha_added) + alpha_added = bloc[0]; /* location of alpha channel in image b */ + + else + alpha_added = 4; /* Won't match an image b channel */ + + if (alpha_removed) + alpha_removed = aloc[0]; /* location of alpha channel in image a */ + + else + alpha_removed = 4; + } + } + + else + { + /* Direct compare is not possible, cancel out all the corresponding local + * variables. + */ + bchannels = 0; + alpha_removed = alpha_added = 4; + btoa[3] = btoa[2] = btoa[1] = btoa[0] = 4; /* 4 == not present */ + } + + for (y=0; ycolormap + a_sample * *ppa++; + else + psa = ppa, ppa += a_sample; + + if (formatb & PNG_FORMAT_FLAG_COLORMAP) + psb = (png_const_bytep)b->colormap + b_sample * *ppb++; + else + psb = ppb, ppb += b_sample; + + /* Do the fast test if possible. */ + if (bchannels) + { + /* Check each 'b' channel against either the corresponding 'a' + * channel or the opaque alpha value, as appropriate. If + * alpha_removed value is set (not 4) then also do this only if the + * 'a' alpha channel (alpha_removed) is opaque; only relevant for + * the 8-bit case. + */ + if (formatb & PNG_FORMAT_FLAG_LINEAR) /* 16-bit checks */ + { + png_const_uint_16p pua = aligncastconst(png_const_uint_16p, psa); + png_const_uint_16p pub = aligncastconst(png_const_uint_16p, psb); + + switch (bchannels) + { + case 4: + if (pua[btoa[3]] != pub[3]) break; + /* FALLTHROUGH */ + case 3: + if (pua[btoa[2]] != pub[2]) break; + /* FALLTHROUGH */ + case 2: + if (pua[btoa[1]] != pub[1]) break; + /* FALLTHROUGH */ + case 1: + if (pua[btoa[0]] != pub[0]) break; + if (alpha_added != 4 && pub[alpha_added] != 65535) break; + continue; /* x loop */ + default: + break; /* impossible */ + } + } + + else if (alpha_removed == 4 || psa[alpha_removed] == 255) + { + switch (bchannels) + { + case 4: + if (psa[btoa[3]] != psb[3]) break; + /* FALLTHROUGH */ + case 3: + if (psa[btoa[2]] != psb[2]) break; + /* FALLTHROUGH */ + case 2: + if (psa[btoa[1]] != psb[1]) break; + /* FALLTHROUGH */ + case 1: + if (psa[btoa[0]] != psb[0]) break; + if (alpha_added != 4 && psb[alpha_added] != 255) break; + continue; /* x loop */ + default: + break; /* impossible */ + } + } + } + + /* If we get to here the fast match failed; do the slow match for this + * pixel. + */ + if (!cmppixel(&tr, psa, psb, x, y) && (a->opts & KEEP_GOING) == 0) + return 0; /* error case */ + } + } + + /* If requested, copy the error values back from the Transform. */ + if (a->opts & ACCUMULATE) + { + tr.error_ptr[0] = tr.error[0]; + tr.error_ptr[1] = tr.error[1]; + tr.error_ptr[2] = tr.error[2]; + tr.error_ptr[3] = tr.error[3]; + } + + return 1; +} + +/* Read the file; how the read gets done depends on which of input_file and + * input_memory have been set. + */ +static int +read_file(Image *image, png_uint_32 format, png_const_colorp background) +{ + memset(&image->image, 0, sizeof image->image); + image->image.version = PNG_IMAGE_VERSION; + + if (image->input_memory != NULL) + { + if (!png_image_begin_read_from_memory(&image->image, image->input_memory, + image->input_memory_size)) + return logerror(image, "memory init: ", image->file_name, ""); + } + +# ifdef PNG_STDIO_SUPPORTED + else if (image->input_file != NULL) + { + if (!png_image_begin_read_from_stdio(&image->image, image->input_file)) + return logerror(image, "stdio init: ", image->file_name, ""); + } + + else + { + if (!png_image_begin_read_from_file(&image->image, image->file_name)) + return logerror(image, "file init: ", image->file_name, ""); + } +# else + else + { + return logerror(image, "unsupported file/stdio init: ", + image->file_name, ""); + } +# endif + + /* This must be set after the begin_read call: */ + if (image->opts & sRGB_16BIT) + image->image.flags |= PNG_IMAGE_FLAG_16BIT_sRGB; + + /* Have an initialized image with all the data we need plus, maybe, an + * allocated file (myfile) or buffer (mybuffer) that need to be freed. + */ + { + int result; + png_uint_32 image_format; + + /* Print both original and output formats. */ + image_format = image->image.format; + + if (image->opts & VERBOSE) + { + printf("%s %lu x %lu %s -> %s", image->file_name, + (unsigned long)image->image.width, + (unsigned long)image->image.height, + format_names[image_format & FORMAT_MASK], + (format & FORMAT_NO_CHANGE) != 0 || image->image.format == format + ? "no change" : format_names[format & FORMAT_MASK]); + + if (background != NULL) + printf(" background(%d,%d,%d)\n", background->red, + background->green, background->blue); + else + printf("\n"); + + fflush(stdout); + } + + /* 'NO_CHANGE' combined with the color-map flag forces the base format + * flags to be set on read to ensure that the original representation is + * not lost in the pass through a colormap format. + */ + if ((format & FORMAT_NO_CHANGE) != 0) + { + if ((format & PNG_FORMAT_FLAG_COLORMAP) != 0 && + (image_format & PNG_FORMAT_FLAG_COLORMAP) != 0) + format = (image_format & ~BASE_FORMATS) | (format & BASE_FORMATS); + + else + format = image_format; + } + + image->image.format = format; + + image->stride = PNG_IMAGE_ROW_STRIDE(image->image) + image->stride_extra; + allocbuffer(image); + + result = png_image_finish_read(&image->image, background, + image->buffer+16, (png_int_32)image->stride, image->colormap); + + checkbuffer(image, image->file_name); + + if (result) + return checkopaque(image); + + else + return logerror(image, image->file_name, ": image read failed", ""); + } +} + +/* Reads from a filename, which must be in image->file_name, but uses + * image->opts to choose the method. The file is always read in its native + * format (the one the simplified API suggests). + */ +static int +read_one_file(Image *image) +{ + if (!(image->opts & USE_FILE) || (image->opts & USE_STDIO)) + { + /* memory or stdio. */ + FILE *f = fopen(image->file_name, "rb"); + + if (f != NULL) + { + if (image->opts & USE_FILE) + image->input_file = f; + + else /* memory */ + { + if (fseek(f, 0, SEEK_END) == 0) + { + long int cb = ftell(f); + + if (cb > 0) + { +#ifndef __COVERITY__ + if ((unsigned long int)cb <= (size_t)~(size_t)0) +#endif + { + png_bytep b = voidcast(png_bytep, malloc((size_t)cb)); + + if (b != NULL) + { + rewind(f); + + if (fread(b, (size_t)cb, 1, f) == 1) + { + fclose(f); + image->input_memory_size = cb; + image->input_memory = b; + } + + else + { + free(b); + return logclose(image, f, image->file_name, + ": read failed: "); + } + } + + else + return logclose(image, f, image->file_name, + ": out of memory: "); + } + + else + return logclose(image, f, image->file_name, + ": file too big for this architecture: "); + /* cb is the length of the file as a (long) and + * this is greater than the maximum amount of + * memory that can be requested from malloc. + */ + } + + else if (cb == 0) + return logclose(image, f, image->file_name, + ": zero length: "); + + else + return logclose(image, f, image->file_name, + ": tell failed: "); + } + + else + return logclose(image, f, image->file_name, ": seek failed: "); + } + } + + else + return logerror(image, image->file_name, ": open failed: ", + strerror(errno)); + } + + return read_file(image, FORMAT_NO_CHANGE, NULL); +} + +#ifdef PNG_SIMPLIFIED_WRITE_SUPPORTED +static int +write_one_file(Image *output, Image *image, int convert_to_8bit) +{ + if (image->opts & FAST_WRITE) + image->image.flags |= PNG_IMAGE_FLAG_FAST; + + if (image->opts & USE_STDIO) + { +#ifdef PNG_SIMPLIFIED_WRITE_STDIO_SUPPORTED +#ifndef __COVERITY__ + FILE *f = tmpfile(); +#else + /* Experimental. Coverity says tmpfile() is insecure because it + * generates predictable names. + * + * It is possible to satisfy Coverity by using mkstemp(); however, + * any platform supporting mkstemp() undoubtedly has a secure tmpfile() + * implementation as well, and doesn't need the fix. Note that + * the fix won't work on platforms that don't support mkstemp(). + * + * https://www.securecoding.cert.org/confluence/display/c/ + * FIO21-C.+Do+not+create+temporary+files+in+shared+directories + * says that most historic implementations of tmpfile() provide + * only a limited number of possible temporary file names + * (usually 26) before file names are recycled. That article also + * provides a secure solution that unfortunately depends upon mkstemp(). + */ + char tmpfile[] = "pngstest-XXXXXX"; + int filedes; + FILE *f; + umask(0177); + filedes = mkstemp(tmpfile); + if (filedes < 0) + f = NULL; + else + { + f = fdopen(filedes,"w+"); + /* Hide the filename immediately and ensure that the file does + * not exist after the program ends + */ + (void) unlink(tmpfile); + } +#endif + + if (f != NULL) + { + if (png_image_write_to_stdio(&image->image, f, convert_to_8bit, + image->buffer+16, (png_int_32)image->stride, image->colormap)) + { + if (fflush(f) == 0) + { + rewind(f); + initimage(output, image->opts, "tmpfile", image->stride_extra); + output->input_file = f; + if (!checkopaque(image)) + return 0; + } + + else + return logclose(image, f, "tmpfile", ": flush: "); + } + + else + { + fclose(f); + return logerror(image, "tmpfile", ": write failed", ""); + } + } + + else + return logerror(image, "tmpfile", ": open: ", strerror(errno)); +#else /* SIMPLIFIED_WRITE_STDIO */ + return logerror(image, "tmpfile", ": open: unsupported", ""); +#endif /* SIMPLIFIED_WRITE_STDIO */ + } + + else if (image->opts & USE_FILE) + { +#ifdef PNG_SIMPLIFIED_WRITE_STDIO_SUPPORTED + static int counter = 0; + char name[32]; + + sprintf(name, "%s%d.png", tmpf, ++counter); + + if (png_image_write_to_file(&image->image, name, convert_to_8bit, + image->buffer+16, (png_int_32)image->stride, image->colormap)) + { + initimage(output, image->opts, output->tmpfile_name, + image->stride_extra); + /* Afterwards, or freeimage will delete it! */ + strcpy(output->tmpfile_name, name); + + if (!checkopaque(image)) + return 0; + } + + else + return logerror(image, name, ": write failed", ""); +#else /* SIMPLIFIED_WRITE_STDIO */ + return logerror(image, "stdio", ": open: unsupported", ""); +#endif /* SIMPLIFIED_WRITE_STDIO */ + } + + else /* use memory */ + { + png_alloc_size_t size; + + if (png_image_write_get_memory_size(image->image, size, convert_to_8bit, + image->buffer+16, (png_int_32)image->stride, image->colormap)) + { + /* This is non-fatal but ignoring it was causing serious problems in + * the macro to be ignored: + */ + if (size > PNG_IMAGE_PNG_SIZE_MAX(image->image)) + return logerror(image, "memory", ": PNG_IMAGE_SIZE_MAX wrong", ""); + + initimage(output, image->opts, "memory", image->stride_extra); + output->input_memory = malloc(size); + + if (output->input_memory != NULL) + { + output->input_memory_size = size; + + if (png_image_write_to_memory(&image->image, output->input_memory, + &output->input_memory_size, convert_to_8bit, image->buffer+16, + (png_int_32)image->stride, image->colormap)) + { + /* This is also non-fatal but it safes safer to error out anyway: + */ + if (size != output->input_memory_size) + return logerror(image, "memory", ": memory size wrong", ""); + } + + else + return logerror(image, "memory", ": write failed", ""); + } + + else + return logerror(image, "memory", ": out of memory", ""); + } + + else + return logerror(image, "memory", ": get size:", ""); + } + + /* 'output' has an initialized temporary image, read this back in and compare + * this against the original: there should be no change since the original + * format was written unmodified unless 'convert_to_8bit' was specified. + * However, if the original image was color-mapped, a simple read will zap + * the linear, color and maybe alpha flags, this will cause spurious failures + * under some circumstances. + */ + if (read_file(output, image->image.format | FORMAT_NO_CHANGE, NULL)) + { + png_uint_32 original_format = image->image.format; + + if (convert_to_8bit) + original_format &= ~PNG_FORMAT_FLAG_LINEAR; + + if ((output->image.format & BASE_FORMATS) != + (original_format & BASE_FORMATS)) + return logerror(image, image->file_name, ": format changed on read: ", + output->file_name); + + return compare_two_images(image, output, 0/*via linear*/, NULL); + } + + else + return logerror(output, output->tmpfile_name, + ": read of new file failed", ""); +} +#endif + +static int +testimage(Image *image, png_uint_32 opts, format_list *pf) +{ + int result; + Image copy; + + /* Copy the original data, stealing it from 'image' */ + checkopaque(image); + copy = *image; + + copy.opts = opts; + copy.buffer = NULL; + copy.bufsize = 0; + copy.allocsize = 0; + + image->input_file = NULL; + image->input_memory = NULL; + image->input_memory_size = 0; + image->tmpfile_name[0] = 0; + + { + png_uint_32 counter; + Image output; + + newimage(&output); + + result = 1; + + /* Use the low bit of 'counter' to indicate whether or not to do alpha + * removal with a background color or by composting onto the image; this + * step gets skipped if it isn't relevant + */ + for (counter=0; counter<2*FORMAT_COUNT; ++counter) + if (format_isset(pf, counter >> 1)) + { + png_uint_32 format = counter >> 1; + + png_color background_color; + png_colorp background = NULL; + + /* If there is a format change that removes the alpha channel then + * the background is relevant. If the output is 8-bit color-mapped + * then a background color *must* be provided, otherwise there are + * two tests to do - one with a color, the other with NULL. The + * NULL test happens second. + */ + if ((counter & 1) == 0) + { + if ((format & PNG_FORMAT_FLAG_ALPHA) == 0 && + (image->image.format & PNG_FORMAT_FLAG_ALPHA) != 0) + { + /* Alpha/transparency will be removed, the background is + * relevant: make it a color the first time + */ + random_color(&background_color); + background = &background_color; + + /* BUT if the output is to a color-mapped 8-bit format then + * the background must always be a color, so increment 'counter' + * to skip the NULL test. + */ + if ((format & PNG_FORMAT_FLAG_COLORMAP) != 0 && + (format & PNG_FORMAT_FLAG_LINEAR) == 0) + ++counter; + } + + /* Otherwise an alpha channel is not being eliminated, just leave + * background NULL and skip the (counter & 1) NULL test. + */ + else + ++counter; + } + /* else just use NULL for background */ + + resetimage(©); + copy.opts = opts; /* in case read_file needs to change it */ + + result = read_file(©, format, background); + if (!result) + break; + + /* Make sure the file just read matches the original file. */ + result = compare_two_images(image, ©, 0/*via linear*/, background); + if (!result) + break; + +# ifdef PNG_SIMPLIFIED_WRITE_SUPPORTED + /* Write the *copy* just made to a new file to make sure the write + * side works ok. Check the conversion to sRGB if the copy is + * linear. + */ + output.opts = opts; + result = write_one_file(&output, ©, 0/*convert to 8bit*/); + if (!result) + break; + + /* Validate against the original too; the background is needed here + * as well so that compare_two_images knows what color was used. + */ + result = compare_two_images(image, &output, 0, background); + if (!result) + break; + + if ((format & PNG_FORMAT_FLAG_LINEAR) != 0 && + (format & PNG_FORMAT_FLAG_COLORMAP) == 0) + { + /* 'output' is linear, convert to the corresponding sRGB format. + */ + output.opts = opts; + result = write_one_file(&output, ©, 1/*convert to 8bit*/); + if (!result) + break; + + /* This may involve a conversion via linear; in the ideal world + * this would round-trip correctly, but libpng 1.5.7 is not the + * ideal world so allow a drift (error_via_linear). + * + * 'image' has an alpha channel but 'output' does not then there + * will a strip-alpha-channel operation (because 'output' is + * linear), handle this by composing on black when doing the + * comparison. + */ + result = compare_two_images(image, &output, 1/*via_linear*/, + background); + if (!result) + break; + } +# endif /* PNG_SIMPLIFIED_WRITE_SUPPORTED */ + } + + freeimage(&output); + } + + freeimage(©); + + return result; +} + +static int +test_one_file(const char *file_name, format_list *formats, png_uint_32 opts, + int stride_extra, int log_pass) +{ + int result; + Image image; + + if (!(opts & NO_RESEED)) + reseed(); /* ensure that the random numbers don't depend on file order */ + newimage(&image); + initimage(&image, opts, file_name, stride_extra); + result = read_one_file(&image); + if (result) + result = testimage(&image, opts, formats); + freeimage(&image); + + /* Ensure that stderr is flushed into any log file */ + fflush(stderr); + + if (log_pass) + { + if (result) + printf("PASS:"); + + else + printf("FAIL:"); + +# ifndef PNG_SIMPLIFIED_WRITE_SUPPORTED + printf(" (no write)"); +# endif + + print_opts(opts); + printf(" %s\n", file_name); + /* stdout may not be line-buffered if it is piped to a file, so: */ + fflush(stdout); + } + + else if (!result) + exit(1); + + return result; +} + +int +main(int argc, char **argv) +{ + png_uint_32 opts = FAST_WRITE | STRICT; + format_list formats; + const char *touch = NULL; + int log_pass = 0; + int redundant = 0; + int stride_extra = 0; + int retval = 0; + int c; + +#if PNG_LIBPNG_VER >= 10700 + /* This error should not exist in 1.7 or later: */ + opts |= GBG_ERROR; +#endif + + init_sRGB_to_d(); +#if 0 + init_error_via_linear(); +#endif + format_init(&formats); + reseed(); /* initialize random number seeds */ + + for (c=1; c= sizeof tmpf) + { + fflush(stdout); + fprintf(stderr, "%s: %s is too long for a temp file prefix\n", + argv[0], argv[c]); + exit(99); + } + + /* Safe: checked above */ + strncpy(tmpf, argv[c], sizeof (tmpf)-1); + } + + else + { + fflush(stdout); + fprintf(stderr, "%s: %s requires a temporary file prefix\n", + argv[0], arg); + exit(99); + } + } + else if (strcmp(arg, "--touch") == 0) + { + if (c+1 < argc) + touch = argv[++c]; + + else + { + fflush(stdout); + fprintf(stderr, "%s: %s requires a file name argument\n", + argv[0], arg); + exit(99); + } + } + else if (arg[0] == '+') + { + png_uint_32 format = formatof(arg+1); + + if (format > FORMAT_COUNT) + exit(99); + + format_set(&formats, format); + } + else if (arg[0] == '-' && arg[1] != 0 && (arg[1] != '0' || arg[2] != 0)) + { + fflush(stdout); + fprintf(stderr, "%s: unknown option: %s\n", argv[0], arg); + exit(99); + } + else + { + if (format_is_initial(&formats)) + format_default(&formats, redundant); + + if (arg[0] == '-') + { + int term = (arg[1] == '0' ? 0 : '\n'); + unsigned int ich = 0; + + /* Loop reading files, use a static buffer to simplify this and just + * stop if the name gets to long. + */ + static char buffer[4096]; + + do + { + int ch = getchar(); + + /* Don't allow '\0' in file names, and terminate with '\n' or, + * for -0, just '\0' (use -print0 to find to make this work!) + */ + if (ch == EOF || ch == term || ch == 0) + { + buffer[ich] = 0; + + if (ich > 0 && !test_one_file(buffer, &formats, opts, + stride_extra, log_pass)) + retval = 1; + + if (ch == EOF) + break; + + ich = 0; + --ich; /* so that the increment below sets it to 0 again */ + } + + else + buffer[ich] = (char)ch; + } while (++ich < sizeof buffer); + + if (ich) + { + buffer[32] = 0; + buffer[4095] = 0; + fprintf(stderr, "%s...%s: file name too long\n", buffer, + buffer+(4096-32)); + exit(99); + } + } + + else if (!test_one_file(arg, &formats, opts, stride_extra, log_pass)) + retval = 1; + } + } + + if (opts & ACCUMULATE) + { + unsigned int in; + + printf("/* contrib/libtests/pngstest-errors.h\n"); + printf(" *\n"); + printf(" * BUILT USING:" PNG_HEADER_VERSION_STRING); + printf(" *\n"); + printf(" * This code is released under the libpng license.\n"); + printf(" * For conditions of distribution and use, see the disclaimer\n"); + printf(" * and license in png.h\n"); + printf(" *\n"); + printf(" * THIS IS A MACHINE GENERATED FILE: do not edit it directly!\n"); + printf(" * Instead run:\n"); + printf(" *\n"); + printf(" * pngstest --accumulate\n"); + printf(" *\n"); + printf(" * on as many PNG files as possible; at least PNGSuite and\n"); + printf(" * contrib/libtests/testpngs.\n"); + printf(" */\n"); + + printf("static png_uint_16 gpc_error[16/*in*/][16/*out*/][4/*a*/] =\n"); + printf("{\n"); + for (in=0; in<16; ++in) + { + unsigned int out; + printf(" { /* input: %s */\n ", format_names[in]); + for (out=0; out<16; ++out) + { + unsigned int alpha; + printf(" {"); + for (alpha=0; alpha<4; ++alpha) + { + printf(" %d", gpc_error[in][out][alpha]); + if (alpha < 3) putchar(','); + } + printf(" }"); + if (out < 15) + { + putchar(','); + if (out % 4 == 3) printf("\n "); + } + } + printf("\n }"); + + if (in < 15) + putchar(','); + else + putchar('\n'); + } + printf("};\n"); + + printf("static png_uint_16 gpc_error_via_linear[16][4/*out*/][4] =\n"); + printf("{\n"); + for (in=0; in<16; ++in) + { + unsigned int out; + printf(" { /* input: %s */\n ", format_names[in]); + for (out=0; out<4; ++out) + { + unsigned int alpha; + printf(" {"); + for (alpha=0; alpha<4; ++alpha) + { + printf(" %d", gpc_error_via_linear[in][out][alpha]); + if (alpha < 3) putchar(','); + } + printf(" }"); + if (out < 3) + putchar(','); + } + printf("\n }"); + + if (in < 15) + putchar(','); + else + putchar('\n'); + } + printf("};\n"); + + printf("static png_uint_16 gpc_error_to_colormap[8/*i*/][8/*o*/][4] =\n"); + printf("{\n"); + for (in=0; in<8; ++in) + { + unsigned int out; + printf(" { /* input: %s */\n ", format_names[in]); + for (out=0; out<8; ++out) + { + unsigned int alpha; + printf(" {"); + for (alpha=0; alpha<4; ++alpha) + { + printf(" %d", gpc_error_to_colormap[in][out][alpha]); + if (alpha < 3) putchar(','); + } + printf(" }"); + if (out < 7) + { + putchar(','); + if (out % 4 == 3) printf("\n "); + } + } + printf("\n }"); + + if (in < 7) + putchar(','); + else + putchar('\n'); + } + printf("};\n"); + printf("/* END MACHINE GENERATED */\n"); + } + + if (retval == 0 && touch != NULL) + { + FILE *fsuccess = fopen(touch, "wt"); + + if (fsuccess != NULL) + { + int error = 0; + fprintf(fsuccess, "PNG simple API tests succeeded\n"); + fflush(fsuccess); + error = ferror(fsuccess); + + if (fclose(fsuccess) || error) + { + fflush(stdout); + fprintf(stderr, "%s: write failed\n", touch); + exit(99); + } + } + + else + { + fflush(stdout); + fprintf(stderr, "%s: open failed\n", touch); + exit(99); + } + } + + return retval; +} + +#else /* !PNG_SIMPLIFIED_READ_SUPPORTED */ +int main(void) +{ + fprintf(stderr, "pngstest: no read support in libpng, test skipped\n"); + /* So the test is skipped: */ + return SKIP; +} +#endif /* PNG_SIMPLIFIED_READ_SUPPORTED */ diff --git a/extern/libpng/contrib/libtests/pngunknown.c b/extern/libpng/contrib/libtests/pngunknown.c new file mode 100644 index 0000000000..05bdd833db --- /dev/null +++ b/extern/libpng/contrib/libtests/pngunknown.c @@ -0,0 +1,1294 @@ + +/* pngunknown.c - test the read side unknown chunk handling + * + * Last changed in libpng 1.6.32 [August 24, 2017] + * Copyright (c) 2015,2017 Glenn Randers-Pehrson + * Written by John Cunningham Bowler + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + * + * NOTES: + * This is a C program that is intended to be linked against libpng. It + * allows the libpng unknown handling code to be tested by interpreting + * arguments to save or discard combinations of chunks. The program is + * currently just a minimal validation for the built-in libpng facilities. + */ + +#include +#include +#include +#include + +/* Define the following to use this test against your installed libpng, rather + * than the one being built here: + */ +#ifdef PNG_FREESTANDING_TESTS +# include +#else +# include "../../png.h" +#endif + +/* 1.6.1 added support for the configure test harness, which uses 77 to indicate + * a skipped test, in earlier versions we need to succeed on a skipped test, so: + */ +#if PNG_LIBPNG_VER >= 10601 && defined(HAVE_CONFIG_H) +# define SKIP 77 +#else +# define SKIP 0 +#endif + + +/* Since this program tests the ability to change the unknown chunk handling + * these must be defined: + */ +#if defined(PNG_SET_UNKNOWN_CHUNKS_SUPPORTED) &&\ + defined(PNG_STDIO_SUPPORTED) &&\ + defined(PNG_READ_SUPPORTED) + +/* One of these must be defined to allow us to find out what happened. It is + * still useful to set unknown chunk handling without either of these in order + * to cause *known* chunks to be discarded. This can be a significant + * efficiency gain, but it can't really be tested here. + */ +#if defined(PNG_READ_USER_CHUNKS_SUPPORTED) ||\ + defined(PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED) + +#if PNG_LIBPNG_VER < 10500 +/* This deliberately lacks the const. */ +typedef png_byte *png_const_bytep; + +/* This is copied from 1.5.1 png.h: */ +#define PNG_INTERLACE_ADAM7_PASSES 7 +#define PNG_PASS_START_ROW(pass) (((1U&~(pass))<<(3-((pass)>>1)))&7) +#define PNG_PASS_START_COL(pass) (((1U& (pass))<<(3-(((pass)+1)>>1)))&7) +#define PNG_PASS_ROW_SHIFT(pass) ((pass)>2?(8-(pass))>>1:3) +#define PNG_PASS_COL_SHIFT(pass) ((pass)>1?(7-(pass))>>1:3) +#define PNG_PASS_ROWS(height, pass) (((height)+(((1<>PNG_PASS_ROW_SHIFT(pass)) +#define PNG_PASS_COLS(width, pass) (((width)+(((1<>PNG_PASS_COL_SHIFT(pass)) +#define PNG_ROW_FROM_PASS_ROW(yIn, pass) \ + (((yIn)<>(((7-(off))-(pass))<<2)) & 0xFU) | \ + ((0x01145AF0U>>(((7-(off))-(pass))<<2)) & 0xF0U)) +#define PNG_ROW_IN_INTERLACE_PASS(y, pass) \ + ((PNG_PASS_MASK(pass,0) >> ((y)&7)) & 1) +#define PNG_COL_IN_INTERLACE_PASS(x, pass) \ + ((PNG_PASS_MASK(pass,1) >> ((x)&7)) & 1) + +/* These are needed too for the default build: */ +#define PNG_WRITE_16BIT_SUPPORTED +#define PNG_READ_16BIT_SUPPORTED + +/* This comes from pnglibconf.h after 1.5: */ +#define PNG_FP_1 100000 +#define PNG_GAMMA_THRESHOLD_FIXED\ + ((png_fixed_point)(PNG_GAMMA_THRESHOLD * PNG_FP_1)) +#endif + +#if PNG_LIBPNG_VER < 10600 + /* 1.6.0 constifies many APIs. The following exists to allow pngvalid to be + * compiled against earlier versions. + */ +# define png_const_structp png_structp +#endif + +#if PNG_LIBPNG_VER < 10700 + /* Copied from libpng 1.7.0 png.h */ +#define PNG_u2(b1, b2) (((unsigned int)(b1) << 8) + (b2)) + +#define PNG_U16(b1, b2) ((png_uint_16)PNG_u2(b1, b2)) +#define PNG_U32(b1, b2, b3, b4)\ + (((png_uint_32)PNG_u2(b1, b2) << 16) + PNG_u2(b3, b4)) + +/* Constants for known chunk types. + */ +#define png_IDAT PNG_U32( 73, 68, 65, 84) +#define png_IEND PNG_U32( 73, 69, 78, 68) +#define png_IHDR PNG_U32( 73, 72, 68, 82) +#define png_PLTE PNG_U32( 80, 76, 84, 69) +#define png_bKGD PNG_U32( 98, 75, 71, 68) +#define png_cHRM PNG_U32( 99, 72, 82, 77) +#define png_eXIf PNG_U32(101, 88, 73, 102) /* registered July 2017 */ +#define png_fRAc PNG_U32(102, 82, 65, 99) /* registered, not defined */ +#define png_gAMA PNG_U32(103, 65, 77, 65) +#define png_gIFg PNG_U32(103, 73, 70, 103) +#define png_gIFt PNG_U32(103, 73, 70, 116) /* deprecated */ +#define png_gIFx PNG_U32(103, 73, 70, 120) +#define png_hIST PNG_U32(104, 73, 83, 84) +#define png_iCCP PNG_U32(105, 67, 67, 80) +#define png_iTXt PNG_U32(105, 84, 88, 116) +#define png_oFFs PNG_U32(111, 70, 70, 115) +#define png_pCAL PNG_U32(112, 67, 65, 76) +#define png_pHYs PNG_U32(112, 72, 89, 115) +#define png_sBIT PNG_U32(115, 66, 73, 84) +#define png_sCAL PNG_U32(115, 67, 65, 76) +#define png_sPLT PNG_U32(115, 80, 76, 84) +#define png_sRGB PNG_U32(115, 82, 71, 66) +#define png_sTER PNG_U32(115, 84, 69, 82) +#define png_tEXt PNG_U32(116, 69, 88, 116) +#define png_tIME PNG_U32(116, 73, 77, 69) +#define png_tRNS PNG_U32(116, 82, 78, 83) +#define png_zTXt PNG_U32(122, 84, 88, 116) + +/* Test on flag values as defined in the spec (section 5.4): */ +#define PNG_CHUNK_ANCILLARY(c) (1 & ((c) >> 29)) +#define PNG_CHUNK_CRITICAL(c) (!PNG_CHUNK_ANCILLARY(c)) +#define PNG_CHUNK_PRIVATE(c) (1 & ((c) >> 21)) +#define PNG_CHUNK_RESERVED(c) (1 & ((c) >> 13)) +#define PNG_CHUNK_SAFE_TO_COPY(c) (1 & ((c) >> 5)) + +#endif /* PNG_LIBPNG_VER < 10700 */ + +#ifdef __cplusplus +# define this not_the_cpp_this +# define new not_the_cpp_new +# define voidcast(type, value) static_cast(value) +#else +# define voidcast(type, value) (value) +#endif /* __cplusplus */ + +/* Unused formal parameter errors are removed using the following macro which is + * expected to have no bad effects on performance. + */ +#ifndef UNUSED +# if defined(__GNUC__) || defined(_MSC_VER) +# define UNUSED(param) (void)param; +# else +# define UNUSED(param) +# endif +#endif + +/* Types of chunks not known to libpng */ +#define png_vpAg PNG_U32(118, 112, 65, 103) + +/* Chunk information */ +#define PNG_INFO_tEXt 0x10000000U +#define PNG_INFO_iTXt 0x20000000U +#define PNG_INFO_zTXt 0x40000000U + +#define PNG_INFO_sTER 0x01000000U +#define PNG_INFO_vpAg 0x02000000U + +#define ABSENT 0 +#define START 1 +#define END 2 + +static struct +{ + char name[5]; + png_uint_32 flag; + png_uint_32 tag; + int unknown; /* Chunk not known to libpng */ + int all; /* Chunk set by the '-1' option */ + int position; /* position in pngtest.png */ + int keep; /* unknown handling setting */ +} chunk_info[] = { + /* Critical chunks */ + { "IDAT", PNG_INFO_IDAT, png_IDAT, 0, 0, START, 0 }, /* must be [0] */ + { "PLTE", PNG_INFO_PLTE, png_PLTE, 0, 0, ABSENT, 0 }, + + /* Non-critical chunks that libpng handles */ + /* This is a mess but it seems to be the only way to do it - there is no way + * to check for a definition outside a #if. + */ + { "bKGD", PNG_INFO_bKGD, png_bKGD, +# ifdef PNG_READ_bKGD_SUPPORTED + 0, +# else + 1, +# endif + 1, START, 0 }, + { "cHRM", PNG_INFO_cHRM, png_cHRM, +# ifdef PNG_READ_cHRM_SUPPORTED + 0, +# else + 1, +# endif + 1, START, 0 }, + { "eXIf", PNG_INFO_eXIf, png_eXIf, +# ifdef PNG_READ_eXIf_SUPPORTED + 0, +# else + 1, +# endif + 1, END, 0 }, + { "gAMA", PNG_INFO_gAMA, png_gAMA, +# ifdef PNG_READ_gAMA_SUPPORTED + 0, +# else + 1, +# endif + 1, START, 0 }, + { "hIST", PNG_INFO_hIST, png_hIST, +# ifdef PNG_READ_hIST_SUPPORTED + 0, +# else + 1, +# endif + 1, ABSENT, 0 }, + { "iCCP", PNG_INFO_iCCP, png_iCCP, +# ifdef PNG_READ_iCCP_SUPPORTED + 0, +# else + 1, +# endif + 1, ABSENT, 0 }, + { "iTXt", PNG_INFO_iTXt, png_iTXt, +# ifdef PNG_READ_iTXt_SUPPORTED + 0, +# else + 1, +# endif + 1, ABSENT, 0 }, + { "oFFs", PNG_INFO_oFFs, png_oFFs, +# ifdef PNG_READ_oFFs_SUPPORTED + 0, +# else + 1, +# endif + 1, START, 0 }, + { "pCAL", PNG_INFO_pCAL, png_pCAL, +# ifdef PNG_READ_pCAL_SUPPORTED + 0, +# else + 1, +# endif + 1, START, 0 }, + { "pHYs", PNG_INFO_pHYs, png_pHYs, +# ifdef PNG_READ_pHYs_SUPPORTED + 0, +# else + 1, +# endif + 1, START, 0 }, + { "sBIT", PNG_INFO_sBIT, png_sBIT, +# ifdef PNG_READ_sBIT_SUPPORTED + 0, +# else + 1, +# endif + 1, START, 0 }, + { "sCAL", PNG_INFO_sCAL, png_sCAL, +# ifdef PNG_READ_sCAL_SUPPORTED + 0, +# else + 1, +# endif + 1, START, 0 }, + { "sPLT", PNG_INFO_sPLT, png_sPLT, +# ifdef PNG_READ_sPLT_SUPPORTED + 0, +# else + 1, +# endif + 1, ABSENT, 0 }, + { "sRGB", PNG_INFO_sRGB, png_sRGB, +# ifdef PNG_READ_sRGB_SUPPORTED + 0, +# else + 1, +# endif + 1, START, 0 }, + { "tEXt", PNG_INFO_tEXt, png_tEXt, +# ifdef PNG_READ_tEXt_SUPPORTED + 0, +# else + 1, +# endif + 1, START, 0 }, + { "tIME", PNG_INFO_tIME, png_tIME, +# ifdef PNG_READ_tIME_SUPPORTED + 0, +# else + 1, +# endif + 1, START, 0 }, + { "tRNS", PNG_INFO_tRNS, png_tRNS, +# ifdef PNG_READ_tRNS_SUPPORTED + 0, +# else + 1, +# endif + 0, ABSENT, 0 }, + { "zTXt", PNG_INFO_zTXt, png_zTXt, +# ifdef PNG_READ_zTXt_SUPPORTED + 0, +# else + 1, +# endif + 1, END, 0 }, + + /* No libpng handling */ + { "sTER", PNG_INFO_sTER, png_sTER, 1, 1, START, 0 }, + { "vpAg", PNG_INFO_vpAg, png_vpAg, 1, 0, START, 0 }, +}; + +#define NINFO ((int)((sizeof chunk_info)/(sizeof chunk_info[0]))) + +static void +clear_keep(void) +{ + int i = NINFO; + while (--i >= 0) + chunk_info[i].keep = 0; +} + +static int +find(const char *name) +{ + int i = NINFO; + while (--i >= 0) + { + if (memcmp(chunk_info[i].name, name, 4) == 0) + break; + } + + return i; +} + +static int +findb(const png_byte *name) +{ + int i = NINFO; + while (--i >= 0) + { + if (memcmp(chunk_info[i].name, name, 4) == 0) + break; + } + + return i; +} + +static int +find_by_flag(png_uint_32 flag) +{ + int i = NINFO; + + while (--i >= 0) if (chunk_info[i].flag == flag) return i; + + fprintf(stderr, "pngunknown: internal error\n"); + exit(4); +} + +static int +ancillary(const char *name) +{ + return PNG_CHUNK_ANCILLARY(PNG_U32(name[0], name[1], name[2], name[3])); +} + +#ifdef PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED +static int +ancillaryb(const png_byte *name) +{ + return PNG_CHUNK_ANCILLARY(PNG_U32(name[0], name[1], name[2], name[3])); +} +#endif + +/* Type of an error_ptr */ +typedef struct +{ + jmp_buf error_return; + png_structp png_ptr; + png_infop info_ptr, end_ptr; + png_uint_32 before_IDAT; + png_uint_32 after_IDAT; + int error_count; + int warning_count; + int keep; /* the default value */ + const char *program; + const char *file; + const char *test; +} display; + +static const char init[] = "initialization"; +static const char cmd[] = "command line"; + +static void +init_display(display *d, const char *program) +{ + memset(d, 0, sizeof *d); + d->png_ptr = NULL; + d->info_ptr = d->end_ptr = NULL; + d->error_count = d->warning_count = 0; + d->program = program; + d->file = program; + d->test = init; +} + +static void +clean_display(display *d) +{ + png_destroy_read_struct(&d->png_ptr, &d->info_ptr, &d->end_ptr); + + /* This must not happen - it might cause an app crash */ + if (d->png_ptr != NULL || d->info_ptr != NULL || d->end_ptr != NULL) + { + fprintf(stderr, "%s(%s): png_destroy_read_struct error\n", d->file, + d->test); + exit(1); + } +} + +PNG_FUNCTION(void, display_exit, (display *d), static PNG_NORETURN) +{ + ++(d->error_count); + + if (d->png_ptr != NULL) + clean_display(d); + + /* During initialization and if this is a single command line argument set + * exit now - there is only one test, otherwise longjmp to do the next test. + */ + if (d->test == init || d->test == cmd) + exit(1); + + longjmp(d->error_return, 1); +} + +static int +display_rc(const display *d, int strict) +{ + return d->error_count + (strict ? d->warning_count : 0); +} + +/* libpng error and warning callbacks */ +PNG_FUNCTION(void, (PNGCBAPI error), (png_structp png_ptr, const char *message), + static PNG_NORETURN) +{ + display *d = (display*)png_get_error_ptr(png_ptr); + + fprintf(stderr, "%s(%s): libpng error: %s\n", d->file, d->test, message); + display_exit(d); +} + +static void PNGCBAPI +warning(png_structp png_ptr, const char *message) +{ + display *d = (display*)png_get_error_ptr(png_ptr); + + fprintf(stderr, "%s(%s): libpng warning: %s\n", d->file, d->test, message); + ++(d->warning_count); +} + +static png_uint_32 +get_valid(display *d, png_infop info_ptr) +{ + png_uint_32 flags = png_get_valid(d->png_ptr, info_ptr, (png_uint_32)~0); + + /* Map the text chunks back into the flags */ + { + png_textp text; + png_uint_32 ntext = png_get_text(d->png_ptr, info_ptr, &text, NULL); + + while (ntext > 0) switch (text[--ntext].compression) + { + case -1: + flags |= PNG_INFO_tEXt; + break; + case 0: + flags |= PNG_INFO_zTXt; + break; + case 1: + case 2: + flags |= PNG_INFO_iTXt; + break; + default: + fprintf(stderr, "%s(%s): unknown text compression %d\n", d->file, + d->test, text[ntext].compression); + display_exit(d); + } + } + + return flags; +} + +#ifdef PNG_READ_USER_CHUNKS_SUPPORTED +static int PNGCBAPI +read_callback(png_structp pp, png_unknown_chunkp pc) +{ + /* This function mimics the behavior of png_set_keep_unknown_chunks by + * returning '0' to keep the chunk and '1' to discard it. + */ + display *d = voidcast(display*, png_get_user_chunk_ptr(pp)); + int chunk = findb(pc->name); + int keep, discard; + + if (chunk < 0) /* not one in our list, so not a known chunk */ + keep = d->keep; + + else + { + keep = chunk_info[chunk].keep; + if (keep == PNG_HANDLE_CHUNK_AS_DEFAULT) + { + /* See the comments in png.h - use the default for unknown chunks, + * do not keep known chunks. + */ + if (chunk_info[chunk].unknown) + keep = d->keep; + + else + keep = PNG_HANDLE_CHUNK_NEVER; + } + } + + switch (keep) + { + default: + fprintf(stderr, "%s(%s): %d: unrecognized chunk option\n", d->file, + d->test, chunk_info[chunk].keep); + display_exit(d); + + case PNG_HANDLE_CHUNK_AS_DEFAULT: + case PNG_HANDLE_CHUNK_NEVER: + discard = 1/*handled; discard*/; + break; + + case PNG_HANDLE_CHUNK_IF_SAFE: + case PNG_HANDLE_CHUNK_ALWAYS: + discard = 0/*not handled; keep*/; + break; + } + + /* Also store information about this chunk in the display, the relevant flag + * is set if the chunk is to be kept ('not handled'.) + */ + if (chunk >= 0) if (!discard) /* stupidity to stop a GCC warning */ + { + png_uint_32 flag = chunk_info[chunk].flag; + + if (pc->location & PNG_AFTER_IDAT) + d->after_IDAT |= flag; + + else + d->before_IDAT |= flag; + } + + /* However if there is no support to store unknown chunks don't ask libpng to + * do it; there will be an png_error. + */ +# ifdef PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED + return discard; +# else + return 1; /*handled; discard*/ +# endif +} +#endif /* READ_USER_CHUNKS_SUPPORTED */ + +#ifdef PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED +static png_uint_32 +get_unknown(display *d, png_infop info_ptr, int after_IDAT) +{ + /* Create corresponding 'unknown' flags */ + png_uint_32 flags = 0; + + UNUSED(after_IDAT) + + { + png_unknown_chunkp unknown; + int num_unknown = png_get_unknown_chunks(d->png_ptr, info_ptr, &unknown); + + while (--num_unknown >= 0) + { + int chunk = findb(unknown[num_unknown].name); + + /* Chunks not known to pngunknown must be validated here; since they + * must also be unknown to libpng the 'display->keep' behavior should + * have been used. + */ + if (chunk < 0) switch (d->keep) + { + default: /* impossible */ + case PNG_HANDLE_CHUNK_AS_DEFAULT: + case PNG_HANDLE_CHUNK_NEVER: + fprintf(stderr, "%s(%s): %s: %s: unknown chunk saved\n", + d->file, d->test, d->keep ? "discard" : "default", + unknown[num_unknown].name); + ++(d->error_count); + break; + + case PNG_HANDLE_CHUNK_IF_SAFE: + if (!ancillaryb(unknown[num_unknown].name)) + { + fprintf(stderr, + "%s(%s): if-safe: %s: unknown critical chunk saved\n", + d->file, d->test, unknown[num_unknown].name); + ++(d->error_count); + break; + } + /* FALLTHROUGH */ /* (safe) */ + case PNG_HANDLE_CHUNK_ALWAYS: + break; + } + + else + flags |= chunk_info[chunk].flag; + } + } + + return flags; +} +#else /* SAVE_UNKNOWN_CHUNKS */ +static png_uint_32 +get_unknown(display *d, png_infop info_ptr, int after_IDAT) + /* Otherwise this will return the cached values set by any user callback */ +{ + UNUSED(info_ptr); + + if (after_IDAT) + return d->after_IDAT; + + else + return d->before_IDAT; +} + +# ifndef PNG_READ_USER_CHUNKS_SUPPORTED + /* The #defines above should mean this is never reached, it's just here as + * a check to ensure the logic is correct. + */ +# error No store support and no user chunk support, this will not work +# endif /* READ_USER_CHUNKS */ +#endif /* SAVE_UNKNOWN_CHUNKS */ + +static int +check(FILE *fp, int argc, const char **argv, png_uint_32p flags/*out*/, + display *d, int set_callback) +{ + int i, npasses, ipass; + png_uint_32 height; + + d->keep = PNG_HANDLE_CHUNK_AS_DEFAULT; + d->before_IDAT = 0; + d->after_IDAT = 0; + + /* Some of these errors are permanently fatal and cause an exit here, others + * are per-test and cause an error return. + */ + d->png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, d, error, + warning); + if (d->png_ptr == NULL) + { + fprintf(stderr, "%s(%s): could not allocate png struct\n", d->file, + d->test); + /* Terminate here, this error is not test specific. */ + exit(1); + } + + d->info_ptr = png_create_info_struct(d->png_ptr); + d->end_ptr = png_create_info_struct(d->png_ptr); + if (d->info_ptr == NULL || d->end_ptr == NULL) + { + fprintf(stderr, "%s(%s): could not allocate png info\n", d->file, + d->test); + clean_display(d); + exit(1); + } + + png_init_io(d->png_ptr, fp); + +# ifdef PNG_READ_USER_CHUNKS_SUPPORTED + /* This is only done if requested by the caller; it interferes with the + * standard store/save mechanism. + */ + if (set_callback) + png_set_read_user_chunk_fn(d->png_ptr, d, read_callback); +# else + UNUSED(set_callback) +# endif + + /* Handle each argument in turn; multiple settings are possible for the same + * chunk and multiple calls will occur (the last one should override all + * preceding ones). + */ + for (i=0; i= 10700 &&\ + !defined(PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED) + if (option < PNG_HANDLE_CHUNK_IF_SAFE) +# endif /* 1.7+ SAVE_UNKNOWN_CHUNKS */ + { + png_byte name[5]; + + memcpy(name, chunk_info[chunk].name, 5); + png_set_keep_unknown_chunks(d->png_ptr, option, name, 1); + chunk_info[chunk].keep = option; + } + continue; + } + + break; + + case 7: /* default */ + if (memcmp(argv[i], "default", 7) == 0) + { +# if PNG_LIBPNG_VER >= 10700 &&\ + !defined(PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED) + if (option < PNG_HANDLE_CHUNK_IF_SAFE) +# endif /* 1.7+ SAVE_UNKNOWN_CHUNKS */ + png_set_keep_unknown_chunks(d->png_ptr, option, NULL, 0); + + d->keep = option; + continue; + } + + break; + + case 3: /* all */ + if (memcmp(argv[i], "all", 3) == 0) + { +# if PNG_LIBPNG_VER >= 10700 &&\ + !defined(PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED) + if (option < PNG_HANDLE_CHUNK_IF_SAFE) +# endif /* 1.7+ SAVE_UNKNOWN_CHUNKS */ + png_set_keep_unknown_chunks(d->png_ptr, option, NULL, -1); + + d->keep = option; + + for (chunk = 0; chunk < NINFO; ++chunk) + if (chunk_info[chunk].all) + chunk_info[chunk].keep = option; + continue; + } + + break; + + default: /* some misplaced = */ + + break; + } + } + + fprintf(stderr, "%s(%s): %s: unrecognized chunk argument\n", d->file, + d->test, argv[i]); + display_exit(d); + } + + png_read_info(d->png_ptr, d->info_ptr); + + switch (png_get_interlace_type(d->png_ptr, d->info_ptr)) + { + case PNG_INTERLACE_NONE: + npasses = 1; + break; + + case PNG_INTERLACE_ADAM7: + npasses = PNG_INTERLACE_ADAM7_PASSES; + break; + + default: + /* Hard error because it is not test specific */ + fprintf(stderr, "%s(%s): invalid interlace type\n", d->file, d->test); + clean_display(d); + exit(1); + } + + /* Skip the image data, if IDAT is not being handled then don't do this + * because it will cause a CRC error. + */ + if (chunk_info[0/*IDAT*/].keep == PNG_HANDLE_CHUNK_AS_DEFAULT) + { + png_start_read_image(d->png_ptr); + height = png_get_image_height(d->png_ptr, d->info_ptr); + + if (npasses > 1) + { + png_uint_32 width = png_get_image_width(d->png_ptr, d->info_ptr); + + for (ipass=0; ipass 0) + { + png_uint_32 y; + + for (y=0; ypng_ptr, NULL, NULL); + } + } + } /* interlaced */ + + else /* not interlaced */ + { + png_uint_32 y; + + for (y=0; ypng_ptr, NULL, NULL); + } + } + + png_read_end(d->png_ptr, d->end_ptr); + + flags[0] = get_valid(d, d->info_ptr); + flags[1] = get_unknown(d, d->info_ptr, 0/*before IDAT*/); + + /* Only png_read_png sets PNG_INFO_IDAT! */ + flags[chunk_info[0/*IDAT*/].keep != PNG_HANDLE_CHUNK_AS_DEFAULT] |= + PNG_INFO_IDAT; + + flags[2] = get_valid(d, d->end_ptr); + flags[3] = get_unknown(d, d->end_ptr, 1/*after IDAT*/); + + clean_display(d); + + return d->keep; +} + +static void +check_error(display *d, png_uint_32 flags, const char *message) +{ + while (flags) + { + png_uint_32 flag = flags & -(png_int_32)flags; + int i = find_by_flag(flag); + + fprintf(stderr, "%s(%s): chunk %s: %s\n", d->file, d->test, + chunk_info[i].name, message); + ++(d->error_count); + + flags &= ~flag; + } +} + +static void +check_handling(display *d, int def, png_uint_32 chunks, png_uint_32 known, + png_uint_32 unknown, const char *position, int set_callback) +{ + while (chunks) + { + png_uint_32 flag = chunks & -(png_int_32)chunks; + int i = find_by_flag(flag); + int keep = chunk_info[i].keep; + const char *type; + const char *errorx = NULL; + + if (chunk_info[i].unknown) + { + if (keep == PNG_HANDLE_CHUNK_AS_DEFAULT) + { + type = "UNKNOWN (default)"; + keep = def; + } + + else + type = "UNKNOWN (specified)"; + + if (flag & known) + errorx = "chunk processed"; + + else switch (keep) + { + case PNG_HANDLE_CHUNK_AS_DEFAULT: + if (flag & unknown) + errorx = "DEFAULT: unknown chunk saved"; + break; + + case PNG_HANDLE_CHUNK_NEVER: + if (flag & unknown) + errorx = "DISCARD: unknown chunk saved"; + break; + + case PNG_HANDLE_CHUNK_IF_SAFE: + if (ancillary(chunk_info[i].name)) + { + if (!(flag & unknown)) + errorx = "IF-SAFE: unknown ancillary chunk lost"; + } + + else if (flag & unknown) + errorx = "IF-SAFE: unknown critical chunk saved"; + break; + + case PNG_HANDLE_CHUNK_ALWAYS: + if (!(flag & unknown)) + errorx = "SAVE: unknown chunk lost"; + break; + + default: + errorx = "internal error: bad keep"; + break; + } + } /* unknown chunk */ + + else /* known chunk */ + { + type = "KNOWN"; + + if (flag & known) + { + /* chunk was processed, it won't have been saved because that is + * caught below when checking for inconsistent processing. + */ + if (keep != PNG_HANDLE_CHUNK_AS_DEFAULT) + errorx = "!DEFAULT: known chunk processed"; + } + + else /* not processed */ switch (keep) + { + case PNG_HANDLE_CHUNK_AS_DEFAULT: + errorx = "DEFAULT: known chunk not processed"; + break; + + case PNG_HANDLE_CHUNK_NEVER: + if (flag & unknown) + errorx = "DISCARD: known chunk saved"; + break; + + case PNG_HANDLE_CHUNK_IF_SAFE: + if (ancillary(chunk_info[i].name)) + { + if (!(flag & unknown)) + errorx = "IF-SAFE: known ancillary chunk lost"; + } + + else if (flag & unknown) + errorx = "IF-SAFE: known critical chunk saved"; + break; + + case PNG_HANDLE_CHUNK_ALWAYS: + if (!(flag & unknown)) + errorx = "SAVE: known chunk lost"; + break; + + default: + errorx = "internal error: bad keep (2)"; + break; + } + } + + if (errorx != NULL) + { + ++(d->error_count); + fprintf(stderr, "%s(%s%s): %s %s %s: %s\n", d->file, d->test, + set_callback ? ",callback" : "", + type, chunk_info[i].name, position, errorx); + } + + chunks &= ~flag; + } +} + +static void +perform_one_test(FILE *fp, int argc, const char **argv, + png_uint_32 *default_flags, display *d, int set_callback) +{ + int def; + png_uint_32 flags[2][4]; + + rewind(fp); + clear_keep(); + memcpy(flags[0], default_flags, sizeof flags[0]); + + def = check(fp, argc, argv, flags[1], d, set_callback); + + /* If IDAT is being handled as unknown the image read is skipped and all the + * IDATs after the first end up in the end info struct, so in this case add + * IDAT to the list of unknowns. (Do this after 'check' above sets the + * chunk_info 'keep' fields.) + * + * Note that the flag setting has to be in the 'known' field to avoid + * triggering the consistency check below and the flag must only be set if + * there are multiple IDATs, so if the check above did find an unknown IDAT + * after IDAT. + */ + if (chunk_info[0/*IDAT*/].keep != PNG_HANDLE_CHUNK_AS_DEFAULT && + (flags[1][3] & PNG_INFO_IDAT) != 0) + flags[0][2] |= PNG_INFO_IDAT; + + /* Chunks should either be known or unknown, never both and this should apply + * whether the chunk is before or after the IDAT (actually, the app can + * probably change this by swapping the handling after the image, but this + * test does not do that.) + */ + check_error(d, (flags[0][0]|flags[0][2]) & (flags[0][1]|flags[0][3]), + "chunk handled inconsistently in count tests"); + check_error(d, (flags[1][0]|flags[1][2]) & (flags[1][1]|flags[1][3]), + "chunk handled inconsistently in option tests"); + + /* Now find out what happened to each chunk before and after the IDAT and + * determine if the behavior was correct. First some basic sanity checks, + * any known chunk should be known in the original count, any unknown chunk + * should be either known or unknown in the original. + */ + { + png_uint_32 test; + + test = flags[1][0] & ~flags[0][0]; + check_error(d, test, "new known chunk before IDAT"); + test = flags[1][1] & ~(flags[0][0] | flags[0][1]); + check_error(d, test, "new unknown chunk before IDAT"); + test = flags[1][2] & ~flags[0][2]; + check_error(d, test, "new known chunk after IDAT"); + test = flags[1][3] & ~(flags[0][2] | flags[0][3]); + check_error(d, test, "new unknown chunk after IDAT"); + } + + /* Now each chunk in the original list should have been handled according to + * the options set for that chunk, regardless of whether libpng knows about + * it or not. + */ + check_handling(d, def, flags[0][0] | flags[0][1], flags[1][0], flags[1][1], + "before IDAT", set_callback); + check_handling(d, def, flags[0][2] | flags[0][3], flags[1][2], flags[1][3], + "after IDAT", set_callback); +} + +static void +perform_one_test_safe(FILE *fp, int argc, const char **argv, + png_uint_32 *default_flags, display *d, const char *test) +{ + if (setjmp(d->error_return) == 0) + { + d->test = test; /* allow use of d->error_return */ +# ifdef PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED + perform_one_test(fp, argc, argv, default_flags, d, 0); +# endif +# ifdef PNG_READ_USER_CHUNKS_SUPPORTED + perform_one_test(fp, argc, argv, default_flags, d, 1); +# endif + d->test = init; /* prevent use of d->error_return */ + } +} + +static const char *standard_tests[] = +{ + "discard", "default=discard", 0, + "save", "default=save", 0, + "if-safe", "default=if-safe", 0, + "vpAg", "vpAg=if-safe", 0, + "sTER", "sTER=if-safe", 0, + "IDAT", "default=discard", "IDAT=save", 0, + "sAPI", "bKGD=save", "cHRM=save", "gAMA=save", "all=discard", "iCCP=save", + "sBIT=save", "sRGB=save", "eXIf=save", 0, + 0/*end*/ +}; + +static PNG_NORETURN void +usage(const char *program, const char *reason) +{ + fprintf(stderr, "pngunknown: %s: usage:\n %s [--strict] " + "--default|{(CHNK|default|all)=(default|discard|if-safe|save)} " + "testfile.png\n", reason, program); + exit(99); +} + +int +main(int argc, const char **argv) +{ + FILE *fp; + png_uint_32 default_flags[4/*valid,unknown{before,after}*/]; + int strict = 0, default_tests = 0; + const char *count_argv = "default=save"; + const char *touch_file = NULL; + display d; + + init_display(&d, argv[0]); + + while (++argv, --argc > 0) + { + if (strcmp(*argv, "--strict") == 0) + strict = 1; + + else if (strcmp(*argv, "--default") == 0) + default_tests = 1; + + else if (strcmp(*argv, "--touch") == 0) + { + if (argc > 1) + touch_file = *++argv, --argc; + + else + usage(d.program, "--touch: missing file name"); + } + + else + break; + } + + /* A file name is required, but there should be no other arguments if + * --default was specified. + */ + if (argc <= 0) + usage(d.program, "missing test file"); + + /* GCC BUG: if (default_tests && argc != 1) triggers some weird GCC argc + * optimization which causes warnings with -Wstrict-overflow! + */ + else if (default_tests) if (argc != 1) + usage(d.program, "extra arguments"); + + /* The name of the test file is the last argument; remove it. */ + d.file = argv[--argc]; + + fp = fopen(d.file, "rb"); + if (fp == NULL) + { + perror(d.file); + exit(99); + } + + /* First find all the chunks, known and unknown, in the test file, a failure + * here aborts the whole test. + * + * If 'save' is supported then the normal saving method should happen, + * otherwise if 'read' is supported then the read callback will do the + * same thing. If both are supported the 'read' callback won't be + * instantiated by default. If 'save' is *not* supported then a user + * callback is required even though we can call png_get_unknown_chunks. + */ + if (check(fp, 1, &count_argv, default_flags, &d, +# ifdef PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED + 0 +# else + 1 +# endif + ) != PNG_HANDLE_CHUNK_ALWAYS) + { + fprintf(stderr, "%s: %s: internal error\n", d.program, d.file); + exit(99); + } + + /* Now find what the various supplied options cause to change: */ + if (!default_tests) + { + d.test = cmd; /* acts as a flag to say exit, do not longjmp */ +# ifdef PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED + perform_one_test(fp, argc, argv, default_flags, &d, 0); +# endif +# ifdef PNG_READ_USER_CHUNKS_SUPPORTED + perform_one_test(fp, argc, argv, default_flags, &d, 1); +# endif + d.test = init; + } + + else + { + const char **test = standard_tests; + + /* Set the exit_test pointer here so we can continue after a libpng error. + * NOTE: this leaks memory because the png_struct data from the failing + * test is never freed. + */ + while (*test) + { + const char *this_test = *test++; + const char **next = test; + int count = display_rc(&d, strict), new_count; + const char *result; + int arg_count = 0; + + while (*next) ++next, ++arg_count; + + perform_one_test_safe(fp, arg_count, test, default_flags, &d, + this_test); + + new_count = display_rc(&d, strict); + + if (new_count == count) + result = "PASS"; + + else + result = "FAIL"; + + printf("%s: %s %s\n", result, d.program, this_test); + + test = next+1; + } + } + + fclose(fp); + + if (display_rc(&d, strict) == 0) + { + /* Success, touch the success file if appropriate */ + if (touch_file != NULL) + { + FILE *fsuccess = fopen(touch_file, "wt"); + + if (fsuccess != NULL) + { + int err = 0; + fprintf(fsuccess, "PNG unknown tests succeeded\n"); + fflush(fsuccess); + err = ferror(fsuccess); + + if (fclose(fsuccess) || err) + { + fprintf(stderr, "%s: write failed\n", touch_file); + exit(99); + } + } + + else + { + fprintf(stderr, "%s: open failed\n", touch_file); + exit(99); + } + } + + return 0; + } + + return 1; +} + +#else /* !(READ_USER_CHUNKS || SAVE_UNKNOWN_CHUNKS) */ +int +main(void) +{ + fprintf(stderr, + " test ignored: no support to find out about unknown chunks\n"); + /* So the test is skipped: */ + return SKIP; +} +#endif /* READ_USER_CHUNKS || SAVE_UNKNOWN_CHUNKS */ + +#else /* !(SET_UNKNOWN_CHUNKS && READ) */ +int +main(void) +{ + fprintf(stderr, + " test ignored: no support to modify unknown chunk handling\n"); + /* So the test is skipped: */ + return SKIP; +} +#endif /* SET_UNKNOWN_CHUNKS && READ*/ diff --git a/extern/libpng/include/contrib/libtests/pngvalid.c b/extern/libpng/contrib/libtests/pngvalid.c similarity index 70% rename from extern/libpng/include/contrib/libtests/pngvalid.c rename to extern/libpng/contrib/libtests/pngvalid.c index 3dd6f2133c..d800110c7a 100644 --- a/extern/libpng/include/contrib/libtests/pngvalid.c +++ b/extern/libpng/contrib/libtests/pngvalid.c @@ -1,9 +1,8 @@ /* pngvalid.c - validate libpng by constructing then reading png files. * - * Last changed in libpng 1.5.8 [%RDATE%] - * Copyright (c) 2012 Glenn Randers-Pehrson - * Written by John Cunningham Bowler + * Last changed in libpng 1.6.31 [July 27, 2017] + * Copyright (c) 2014-2017 John Cunningham Bowler * * This code is released under the libpng license. * For conditions of distribution and use, see the disclaimer @@ -22,13 +21,29 @@ #define _POSIX_SOURCE 1 #define _ISOC99_SOURCE 1 /* For floating point */ #define _GNU_SOURCE 1 /* For the floating point exception extension */ +#define _BSD_SOURCE 1 /* For the floating point exception extension */ #include +#include -#ifdef HAVE_FEENABLEEXCEPT +#if defined(HAVE_CONFIG_H) && !defined(PNG_NO_CONFIG_H) +# include +#endif + +#ifdef HAVE_FEENABLEEXCEPT /* from config.h, if included */ # include #endif +#ifndef FE_DIVBYZERO +# define FE_DIVBYZERO 0 +#endif +#ifndef FE_INVALID +# define FE_INVALID 0 +#endif +#ifndef FE_OVERFLOW +# define FE_OVERFLOW 0 +#endif + /* Define the following to use this test against your installed libpng, rather * than the one being built here: */ @@ -38,8 +53,28 @@ # include "../../png.h" #endif +#ifdef PNG_ZLIB_HEADER +# include PNG_ZLIB_HEADER +#else +# include /* For crc32 */ +#endif + +/* 1.6.1 added support for the configure test harness, which uses 77 to indicate + * a skipped test, in earlier versions we need to succeed on a skipped test, so: + */ +#if PNG_LIBPNG_VER >= 10601 && defined(HAVE_CONFIG_H) +# define SKIP 77 +#else +# define SKIP 0 +#endif + +/* pngvalid requires write support and one of the fixed or floating point APIs. + */ +#if defined(PNG_WRITE_SUPPORTED) &&\ + (defined(PNG_FIXED_POINT_SUPPORTED) || defined(PNG_FLOATING_POINT_SUPPORTED)) + #if PNG_LIBPNG_VER < 10500 -/* This deliberately lacks the PNG_CONST. */ +/* This deliberately lacks the const. */ typedef png_byte *png_const_bytep; /* This is copied from 1.5.1 png.h: */ @@ -68,19 +103,45 @@ typedef png_byte *png_const_bytep; #define PNG_WRITE_16BIT_SUPPORTED #define PNG_READ_16BIT_SUPPORTED -/* This comes from pnglibconf.h afer 1.5: */ +/* This comes from pnglibconf.h after 1.5: */ #define PNG_FP_1 100000 #define PNG_GAMMA_THRESHOLD_FIXED\ ((png_fixed_point)(PNG_GAMMA_THRESHOLD * PNG_FP_1)) #endif -#include "zlib.h" /* For crc32 */ +#if PNG_LIBPNG_VER < 10600 + /* 1.6.0 constifies many APIs, the following exists to allow pngvalid to be + * compiled against earlier versions. + */ +# define png_const_structp png_structp +#endif + +#ifndef RELEASE_BUILD + /* RELEASE_BUILD is true for releases and release candidates: */ +# define RELEASE_BUILD (PNG_LIBPNG_BUILD_BASE_TYPE >= PNG_LIBPNG_BUILD_RC) +#endif +#if RELEASE_BUILD +# define debugonly(something) +#else /* !RELEASE_BUILD */ +# define debugonly(something) something +#endif /* !RELEASE_BUILD */ #include /* For floating point constants */ #include /* For malloc */ #include /* For memcpy, memset */ #include /* For floor */ +/* Convenience macros. */ +#define CHUNK(a,b,c,d) (((a)<<24)+((b)<<16)+((c)<<8)+(d)) +#define CHUNK_IHDR CHUNK(73,72,68,82) +#define CHUNK_PLTE CHUNK(80,76,84,69) +#define CHUNK_IDAT CHUNK(73,68,65,84) +#define CHUNK_IEND CHUNK(73,69,78,68) +#define CHUNK_cHRM CHUNK(99,72,82,77) +#define CHUNK_gAMA CHUNK(103,65,77,65) +#define CHUNK_sBIT CHUNK(115,66,73,84) +#define CHUNK_sRGB CHUNK(115,82,71,66) + /* Unused formal parameter errors are removed using the following macro which is * expected to have no bad effects on performance. */ @@ -93,7 +154,11 @@ typedef png_byte *png_const_bytep; #endif /***************************** EXCEPTION HANDLING *****************************/ -#include "../visupng/cexcept.h" +#ifdef PNG_FREESTANDING_TESTS +# include +#else +# include "../visupng/cexcept.h" +#endif #ifdef __cplusplus # define this not_the_cpp_this @@ -113,6 +178,31 @@ define_exception_type(struct png_store*); &(ps)->exception_context #define context(ps,fault) anon_context(ps); png_store *fault +/* This macro returns the number of elements in an array as an (unsigned int), + * it is necessary to avoid the inability of certain versions of GCC to use + * the value of a compile-time constant when performing range checks. It must + * be passed an array name. + */ +#define ARRAY_SIZE(a) ((unsigned int)((sizeof (a))/(sizeof (a)[0]))) + +/* GCC BUG 66447 (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66447) requires + * some broken GCC versions to be fixed up to avoid invalid whining about auto + * variables that are *not* changed within the scope of a setjmp being changed. + * + * Feel free to extend the list of broken versions. + */ +#define is_gnu(major,minor)\ + (defined __GNUC__) && __GNUC__ == (major) && __GNUC_MINOR__ == (minor) +#define is_gnu_patch(major,minor,patch)\ + is_gnu(major,minor) && __GNUC_PATCHLEVEL__ == 0 +/* For the moment just do it always; all versions of GCC seem to be broken: */ +#ifdef __GNUC__ + const void * volatile make_volatile_for_gnu; +# define gnu_volatile(x) make_volatile_for_gnu = &x; +#else /* !GNUC broken versions */ +# define gnu_volatile(x) +#endif /* !GNUC broken versions */ + /******************************* UTILITIES ************************************/ /* Error handling is particularly problematic in production code - error * handlers often themselves have bugs which lead to programs that detect @@ -121,7 +211,7 @@ define_exception_type(struct png_store*); * warning messages into buffers that are too small. */ static size_t safecat(char *buffer, size_t bufsize, size_t pos, - PNG_CONST char *cat) + const char *cat) { while (pos < bufsize && cat != NULL && *cat != 0) buffer[pos++] = *cat++; @@ -150,15 +240,16 @@ static size_t safecatd(char *buffer, size_t bufsize, size_t pos, double d, } #endif -static PNG_CONST char invalid[] = "invalid"; -static PNG_CONST char sep[] = ": "; +static const char invalid[] = "invalid"; +static const char sep[] = ": "; -static PNG_CONST char *colour_types[8] = +static const char *colour_types[8] = { "grayscale", invalid, "truecolour", "indexed-colour", "grayscale with alpha", invalid, "truecolour with alpha", invalid }; +#ifdef PNG_READ_TRANSFORMS_SUPPORTED /* Convert a double precision value to fixed point. */ static png_fixed_point fix(double d) @@ -166,12 +257,14 @@ fix(double d) d = floor(d * PNG_FP_1 + .5); return (png_fixed_point)d; } +#endif /* PNG_READ_SUPPORTED */ /* Generate random bytes. This uses a boring repeatable algorithm and it * is implemented here so that it gives the same set of numbers on every * architecture. It's a linear congruential generator (Knuth or Sedgewick * "Algorithms") but it comes from the 'feedback taps' table in Horowitz and - * Hill, "The Art of Electronics". + * Hill, "The Art of Electronics" (Pseudo-Random Bit Sequences and Noise + * Generation.) */ static void make_random_bytes(png_uint_32* seed, void* pv, size_t size) @@ -204,6 +297,8 @@ make_four_random_bytes(png_uint_32* seed, png_bytep bytes) make_random_bytes(seed, bytes, 4); } +#if defined PNG_READ_SUPPORTED || defined PNG_WRITE_tRNS_SUPPORTED ||\ + defined PNG_WRITE_FILTER_SUPPORTED static void randomize(void *pv, size_t size) { @@ -211,32 +306,62 @@ randomize(void *pv, size_t size) make_random_bytes(random_seed, pv, size); } -#define RANDOMIZE(this) randomize(&(this), sizeof (this)) +#define R8(this) randomize(&(this), sizeof (this)) +#ifdef PNG_READ_SUPPORTED +static png_byte +random_byte(void) +{ + unsigned char b1[1]; + randomize(b1, sizeof b1); + return b1[0]; +} +#endif /* READ */ + +static png_uint_16 +random_u16(void) +{ + unsigned char b2[2]; + randomize(b2, sizeof b2); + return png_get_uint_16(b2); +} + +#if defined PNG_READ_RGB_TO_GRAY_SUPPORTED ||\ + defined PNG_READ_FILLER_SUPPORTED +static png_uint_32 +random_u32(void) +{ + unsigned char b4[4]; + randomize(b4, sizeof b4); + return png_get_uint_32(b4); +} +#endif /* READ_FILLER || READ_RGB_TO_GRAY */ + +#endif /* READ || WRITE_tRNS || WRITE_FILTER */ + +#if defined PNG_READ_TRANSFORMS_SUPPORTED ||\ + defined PNG_WRITE_FILTER_SUPPORTED static unsigned int random_mod(unsigned int max) { - unsigned int x; - - RANDOMIZE(x); - - return x % max; /* 0 .. max-1 */ + return random_u16() % max; /* 0 .. max-1 */ } +#endif /* READ_TRANSFORMS || WRITE_FILTER */ +#if (defined PNG_READ_RGB_TO_GRAY_SUPPORTED) ||\ + (defined PNG_READ_FILLER_SUPPORTED) static int random_choice(void) { - unsigned char x; - - RANDOMIZE(x); - - return x & 1; + return random_byte() & 1; } +#endif /* READ_RGB_TO_GRAY || READ_FILLER */ /* A numeric ID based on PNG file characteristics. The 'do_interlace' field * simply records whether pngvalid did the interlace itself or whether it * was done by libpng. Width and height must be less than 256. 'palette' is an - * index of the palette to use for formats with a palette (0 otherwise.) + * index of the palette to use for formats with a palette otherwise a boolean + * indicating if a tRNS chunk was generated. */ #define FILEID(col, depth, palette, interlace, width, height, do_interlace) \ ((png_uint_32)((col) + ((depth)<<3) + ((palette)<<8) + ((interlace)<<13) + \ @@ -244,8 +369,8 @@ random_choice(void) #define COL_FROM_ID(id) ((png_byte)((id)& 0x7U)) #define DEPTH_FROM_ID(id) ((png_byte)(((id) >> 3) & 0x1fU)) -#define PALETTE_FROM_ID(id) ((int)(((id) >> 8) & 0x1f)) -#define INTERLACE_FROM_ID(id) ((int)(((id) >> 13) & 0x3)) +#define PALETTE_FROM_ID(id) (((id) >> 8) & 0x1f) +#define INTERLACE_FROM_ID(id) ((png_byte)(((id) >> 13) & 0x3)) #define DO_INTERLACE_FROM_ID(id) ((int)(((id)>>15) & 1)) #define WIDTH_FROM_ID(id) (((id)>>16) & 0xff) #define HEIGHT_FROM_ID(id) (((id)>>24) & 0xff) @@ -253,16 +378,20 @@ random_choice(void) /* Utility to construct a standard name for a standard image. */ static size_t standard_name(char *buffer, size_t bufsize, size_t pos, png_byte colour_type, - int bit_depth, int npalette, int interlace_type, + int bit_depth, unsigned int npalette, int interlace_type, png_uint_32 w, png_uint_32 h, int do_interlace) { pos = safecat(buffer, bufsize, pos, colour_types[colour_type]); - if (npalette > 0) + if (colour_type == 3) /* must have a palette */ { pos = safecat(buffer, bufsize, pos, "["); pos = safecatn(buffer, bufsize, pos, npalette); pos = safecat(buffer, bufsize, pos, "]"); } + + else if (npalette != 0) + pos = safecat(buffer, bufsize, pos, "+tRNS"); + pos = safecat(buffer, bufsize, pos, " "); pos = safecatn(buffer, bufsize, pos, bit_depth); pos = safecat(buffer, bufsize, pos, " bit"); @@ -315,23 +444,36 @@ standard_name_from_id(char *buffer, size_t bufsize, size_t pos, png_uint_32 id) /* The following defines the number of different palettes to generate for * each log bit depth of a colour type 3 standard image. */ -#define PALETTE_COUNT(bit_depth) ((bit_depth) > 4 ? 1 : 16) +#define PALETTE_COUNT(bit_depth) ((bit_depth) > 4 ? 1U : 16U) static int -next_format(png_bytep colour_type, png_bytep bit_depth, int* palette_number) +next_format(png_bytep colour_type, png_bytep bit_depth, + unsigned int* palette_number, int low_depth_gray, int tRNS) { if (*bit_depth == 0) { - *colour_type = 0, *bit_depth = 1, *palette_number = 0; + *colour_type = 0; + if (low_depth_gray) + *bit_depth = 1; + else + *bit_depth = 8; + *palette_number = 0; return 1; } - if (*colour_type == 3) + if (*colour_type < 4/*no alpha channel*/) { - /* Add multiple palettes for colour type 3. */ - if (++*palette_number < PALETTE_COUNT(*bit_depth)) + /* Add multiple palettes for colour type 3, one image with tRNS + * and one without for other non-alpha formats: + */ + unsigned int pn = ++*palette_number; + png_byte ct = *colour_type; + + if (((ct == 0/*GRAY*/ || ct/*RGB*/ == 2) && tRNS && pn < 2) || + (ct == 3/*PALETTE*/ && pn < PALETTE_COUNT(*bit_depth))) return 1; + /* No: next bit depth */ *palette_number = 0; } @@ -339,9 +481,9 @@ next_format(png_bytep colour_type, png_bytep bit_depth, int* palette_number) /* Palette images are restricted to 8 bit depth */ if (*bit_depth <= 8 -# ifdef DO_16BIT +#ifdef DO_16BIT || (*colour_type != 3 && *bit_depth <= 16) -# endif +#endif ) return 1; @@ -376,7 +518,7 @@ next_format(png_bytep colour_type, png_bytep bit_depth, int* palette_number) #ifdef PNG_READ_TRANSFORMS_SUPPORTED static unsigned int sample(png_const_bytep row, png_byte colour_type, png_byte bit_depth, - png_uint_32 x, unsigned int sample_index) + png_uint_32 x, unsigned int sample_index, int swap16, int littleendian) { png_uint_32 bit_index, result; @@ -405,11 +547,23 @@ sample(png_const_bytep row, png_byte colour_type, png_byte bit_depth, return result; else if (bit_depth > 8) - return (result << 8) + *++row; + { + if (swap16) + return (*++row << 8) + result; + else + return (result << 8) + *++row; + } - /* Less than 8 bits per sample. */ + /* Less than 8 bits per sample. By default PNG has the big end of + * the egg on the left of the screen, but if littleendian is set + * then the big end is on the right. + */ bit_index &= 7; - return (result >> (8-bit_index-bit_depth)) & ((1U<> bit_index) & ((1U<> 3] & ~destMask; unsigned int sourceByte = fromBuffer[fromIndex >> 3]; /* Don't rely on << or >> supporting '0' here, just in case: */ fromIndex &= 7; - if (fromIndex > 0) sourceByte <<= fromIndex; - if ((toIndex & 7) > 0) sourceByte >>= toIndex & 7; + if (littleendian) + { + if (fromIndex > 0) sourceByte >>= fromIndex; + if ((toIndex & 7) > 0) sourceByte <<= toIndex & 7; + } + + else + { + if (fromIndex > 0) sourceByte <<= fromIndex; + if ((toIndex & 7) > 0) sourceByte >>= toIndex & 7; + } toBuffer[toIndex >> 3] = (png_byte)(destByte | (sourceByte & destMask)); } @@ -449,11 +614,13 @@ pixel_copy(png_bytep toBuffer, png_uint_32 toIndex, memmove(toBuffer+(toIndex>>3), fromBuffer+(fromIndex>>3), pixelSize>>3); } +#ifdef PNG_READ_SUPPORTED /* Copy a complete row of pixels, taking into account potential partial * bytes at the end. */ static void -row_copy(png_bytep toBuffer, png_const_bytep fromBuffer, unsigned int bitWidth) +row_copy(png_bytep toBuffer, png_const_bytep fromBuffer, unsigned int bitWidth, + int littleendian) { memcpy(toBuffer, fromBuffer, bitWidth >> 3); @@ -463,10 +630,10 @@ row_copy(png_bytep toBuffer, png_const_bytep fromBuffer, unsigned int bitWidth) toBuffer += bitWidth >> 3; fromBuffer += bitWidth >> 3; - /* The remaining bits are in the top of the byte, the mask is the bits to - * retain. - */ - mask = 0xff >> (bitWidth & 7); + if (littleendian) + mask = 0xff << (bitWidth & 7); + else + mask = 0xff >> (bitWidth & 7); *toBuffer = (png_byte)((*toBuffer & mask) | (*fromBuffer & ~mask)); } } @@ -514,6 +681,7 @@ pixel_cmp(png_const_bytep pa, png_const_bytep pb, png_uint_32 bit_width) return 1+where; } } +#endif /* PNG_READ_SUPPORTED */ /*************************** BASIC PNG FILE WRITING ***************************/ /* A png_store takes data from the sequential writer or provides data @@ -541,8 +709,10 @@ typedef struct png_store_file { struct png_store_file* next; /* as many as you like... */ char name[FILE_NAME_SIZE]; + unsigned int IDAT_bits; /* Number of bits in IDAT size */ + png_uint_32 IDAT_size; /* Total size of IDAT data */ png_uint_32 id; /* must be correct (see FILEID) */ - png_size_t datacount; /* In this (the last) buffer */ + size_t datacount; /* In this (the last) buffer */ png_store_buffer data; /* Last buffer in file */ int npalette; /* Number of entries in palette */ store_palette_entry* palette; /* May be NULL */ @@ -588,18 +758,33 @@ typedef struct png_store unsigned int validated :1; /* used as a temporary flag */ int nerrors; int nwarnings; - char test[128]; /* Name of test */ + int noptions; /* number of options below: */ + struct { + unsigned char option; /* option number, 0..30 */ + unsigned char setting; /* setting (unset,invalid,on,off) */ + } options[16]; + char test[128]; /* Name of test */ char error[256]; + /* Share fields */ + png_uint_32 chunklen; /* Length of chunk+overhead (chunkpos >= 8) */ + png_uint_32 chunktype;/* Type of chunk (valid if chunkpos >= 4) */ + png_uint_32 chunkpos; /* Position in chunk */ + png_uint_32 IDAT_size;/* Accumulated IDAT size in .new */ + unsigned int IDAT_bits;/* Cache of the file store value */ + /* Read fields */ png_structp pread; /* Used to read a saved file */ png_infop piread; png_store_file* current; /* Set when reading */ png_store_buffer* next; /* Set when reading */ - png_size_t readpos; /* Position in *next */ + size_t readpos; /* Position in *next */ png_byte* image; /* Buffer for reading interlaced images */ - png_size_t cb_image; /* Size of this buffer */ - png_size_t cb_row; /* Row size of the image(s) */ + size_t cb_image; /* Size of this buffer */ + size_t cb_row; /* Row size of the image(s) */ + uLong IDAT_crc; + png_uint_32 IDAT_len; /* Used when re-chunking IDAT chunks */ + png_uint_32 IDAT_pos; /* Used when re-chunking IDAT chunks */ png_uint_32 image_h; /* Number of rows in a single image */ store_pool read_memory_pool; @@ -607,7 +792,7 @@ typedef struct png_store png_store_file* saved; png_structp pwrite; /* Used when writing a new file */ png_infop piwrite; - png_size_t writepos; /* Position in .new */ + size_t writepos; /* Position in .new */ char wname[FILE_NAME_SIZE]; png_store_buffer new; /* The end of the new PNG file being written. */ store_pool write_memory_pool; @@ -624,6 +809,7 @@ store_pool_mark(png_bytep mark) make_four_random_bytes(store_seed, mark); } +#ifdef PNG_READ_TRANSFORMS_SUPPORTED /* Use this for random 32 bit values; this function makes sure the result is * non-zero. */ @@ -631,7 +817,7 @@ static png_uint_32 random_32(void) { - for(;;) + for (;;) { png_byte mark[4]; png_uint_32 result; @@ -643,6 +829,7 @@ random_32(void) return result; } } +#endif /* PNG_READ_SUPPORTED */ static void store_pool_init(png_store *ps, store_pool *pool) @@ -684,9 +871,15 @@ store_init(png_store* ps) ps->pwrite = NULL; ps->piwrite = NULL; ps->writepos = 0; + ps->chunkpos = 8; + ps->chunktype = 0; + ps->chunklen = 16; + ps->IDAT_size = 0; + ps->IDAT_bits = 0; ps->new.prev = NULL; ps->palette = NULL; ps->npalette = 0; + ps->noptions = 0; } static void @@ -705,6 +898,11 @@ store_freenew(png_store *ps) { store_freebuffer(&ps->new); ps->writepos = 0; + ps->chunkpos = 8; + ps->chunktype = 0; + ps->chunklen = 16; + ps->IDAT_size = 0; + ps->IDAT_bits = 0; if (ps->palette != NULL) { free(ps->palette); @@ -718,9 +916,6 @@ store_storenew(png_store *ps) { png_store_buffer *pb; - if (ps->writepos != STORE_BUFFER_SIZE) - png_error(ps->pwrite, "invalid store call"); - pb = voidcast(png_store_buffer*, malloc(sizeof *pb)); if (pb == NULL) @@ -751,21 +946,52 @@ store_freefile(png_store_file **ppf) } } -/* Main interface to file storeage, after writing a new PNG file (see the API +static unsigned int +bits_of(png_uint_32 num) +{ + /* Return the number of bits in 'num' */ + unsigned int b = 0; + + if (num & 0xffff0000U) b += 16U, num >>= 16; + if (num & 0xff00U) b += 8U, num >>= 8; + if (num & 0xf0U) b += 4U, num >>= 4; + if (num & 0xcU) b += 2U, num >>= 2; + if (num & 0x2U) ++b, num >>= 1; + if (num) ++b; + + return b; /* 0..32 */ +} + +/* Main interface to file storage, after writing a new PNG file (see the API * below) call store_storefile to store the result with the given name and id. */ static void store_storefile(png_store *ps, png_uint_32 id) { - png_store_file *pf = voidcast(png_store_file*, malloc(sizeof *pf)); + png_store_file *pf; + + if (ps->chunkpos != 0U || ps->chunktype != 0U || ps->chunklen != 0U || + ps->IDAT_size == 0) + png_error(ps->pwrite, "storefile: incomplete write"); + + pf = voidcast(png_store_file*, malloc(sizeof *pf)); if (pf == NULL) png_error(ps->pwrite, "storefile: OOM"); safecat(pf->name, sizeof pf->name, 0, ps->wname); pf->id = id; pf->data = ps->new; pf->datacount = ps->writepos; + pf->IDAT_size = ps->IDAT_size; + pf->IDAT_bits = bits_of(ps->IDAT_size); + /* Because the IDAT always has zlib header stuff this must be true: */ + if (pf->IDAT_bits == 0U) + png_error(ps->pwrite, "storefile: 0 sized IDAT"); ps->new.prev = NULL; ps->writepos = 0; + ps->chunkpos = 8; + ps->chunktype = 0; + ps->chunklen = 16; + ps->IDAT_size = 0; pf->palette = ps->palette; pf->npalette = ps->npalette; ps->palette = 0; @@ -778,8 +1004,8 @@ store_storefile(png_store *ps, png_uint_32 id) /* Generate an error message (in the given buffer) */ static size_t -store_message(png_store *ps, png_structp pp, char *buffer, size_t bufsize, - size_t pos, PNG_CONST char *msg) +store_message(png_store *ps, png_const_structp pp, char *buffer, size_t bufsize, + size_t pos, const char *msg) { if (pp != NULL && pp == ps->pread) { @@ -818,7 +1044,7 @@ store_message(png_store *ps, png_structp pp, char *buffer, size_t bufsize, /* Verbose output to the error stream: */ static void -store_verbose(png_store *ps, png_structp pp, png_const_charp prefix, +store_verbose(png_store *ps, png_const_structp pp, png_const_charp prefix, png_const_charp message) { char buffer[512]; @@ -833,7 +1059,8 @@ store_verbose(png_store *ps, png_structp pp, png_const_charp prefix, /* Log an error or warning - the relevant count is always incremented. */ static void -store_log(png_store* ps, png_structp pp, png_const_charp message, int is_error) +store_log(png_store* ps, png_const_structp pp, png_const_charp message, + int is_error) { /* The warning is copied to the error buffer if there are no errors and it is * the first warning. The error is copied to the error buffer if it is the @@ -847,6 +1074,7 @@ store_log(png_store* ps, png_structp pp, png_const_charp message, int is_error) store_verbose(ps, pp, is_error ? "error: " : "warning: ", message); } +#ifdef PNG_READ_SUPPORTED /* Internal error function, called with a png_store but no libpng stuff. */ static void internal_error(png_store *ps, png_const_charp message) @@ -859,11 +1087,13 @@ internal_error(png_store *ps, png_const_charp message) Throw ps; } } +#endif /* PNG_READ_SUPPORTED */ /* Functions to use as PNG callbacks. */ -static void -store_error(png_structp pp, png_const_charp message) /* PNG_NORETURN */ +static void PNGCBAPI +store_error(png_structp ppIn, png_const_charp message) /* PNG_NORETURN */ { + png_const_structp pp = ppIn; png_store *ps = voidcast(png_store*, png_get_error_ptr(pp)); if (!ps->expect_error) @@ -876,9 +1106,10 @@ store_error(png_structp pp, png_const_charp message) /* PNG_NORETURN */ } } -static void -store_warning(png_structp pp, png_const_charp message) +static void PNGCBAPI +store_warning(png_structp ppIn, png_const_charp message) { + png_const_structp pp = ppIn; png_store *ps = voidcast(png_store*, png_get_error_ptr(pp)); if (!ps->expect_warning) @@ -892,10 +1123,10 @@ store_warning(png_structp pp, png_const_charp message) */ /* Return a single row from the correct image. */ static png_bytep -store_image_row(PNG_CONST png_store* ps, png_structp pp, int nImage, +store_image_row(const png_store* ps, png_const_structp pp, int nImage, png_uint_32 y) { - png_size_t coffset = (nImage * ps->image_h + y) * (ps->cb_row + 5) + 2; + size_t coffset = (nImage * ps->image_h + y) * (ps->cb_row + 5) + 2; if (ps->image == NULL) png_error(pp, "no allocated image"); @@ -907,7 +1138,7 @@ store_image_row(PNG_CONST png_store* ps, png_structp pp, int nImage, } static void -store_image_free(png_store *ps, png_structp pp) +store_image_free(png_store *ps, png_const_structp pp) { if (ps->image != NULL) { @@ -929,10 +1160,10 @@ store_image_free(png_store *ps, png_structp pp) } static void -store_ensure_image(png_store *ps, png_structp pp, int nImages, png_size_t cbRow, - png_uint_32 cRows) +store_ensure_image(png_store *ps, png_const_structp pp, int nImages, + size_t cbRow, png_uint_32 cRows) { - png_size_t cb = nImages * cRows * (cbRow + 5); + size_t cb = nImages * cRows * (cbRow + 5); if (ps->cb_image < cb) { @@ -994,8 +1225,9 @@ store_ensure_image(png_store *ps, png_structp pp, int nImages, png_size_t cbRow, } } +#ifdef PNG_READ_SUPPORTED static void -store_image_check(PNG_CONST png_store* ps, png_structp pp, int iImage) +store_image_check(const png_store* ps, png_const_structp pp, int iImage) { png_const_bytep image = ps->image; @@ -1003,14 +1235,14 @@ store_image_check(PNG_CONST png_store* ps, png_structp pp, int iImage) png_error(pp, "image overwrite"); else { - png_size_t cbRow = ps->cb_row; + size_t cbRow = ps->cb_row; png_uint_32 rows = ps->image_h; image += iImage * (cbRow+5) * ps->image_h; image += 2; /* skip image first row markers */ - while (rows-- > 0) + for (; rows > 0; --rows) { if (image[-2] != 190 || image[-1] != 239) png_error(pp, "row start overwritten"); @@ -1023,40 +1255,130 @@ store_image_check(PNG_CONST png_store* ps, png_structp pp, int iImage) } } } +#endif /* PNG_READ_SUPPORTED */ -static void -store_write(png_structp pp, png_bytep pb, png_size_t st) +static int +valid_chunktype(png_uint_32 chunktype) { + /* Each byte in the chunk type must be in one of the ranges 65..90, 97..122 + * (both inclusive), so: + */ + unsigned int i; + + for (i=0; i<4; ++i) + { + unsigned int c = chunktype & 0xffU; + + if (!((c >= 65U && c <= 90U) || (c >= 97U && c <= 122U))) + return 0; + + chunktype >>= 8; + } + + return 1; /* It's valid */ +} + +static void PNGCBAPI +store_write(png_structp ppIn, png_bytep pb, size_t st) +{ + png_const_structp pp = ppIn; png_store *ps = voidcast(png_store*, png_get_io_ptr(pp)); + size_t writepos = ps->writepos; + png_uint_32 chunkpos = ps->chunkpos; + png_uint_32 chunktype = ps->chunktype; + png_uint_32 chunklen = ps->chunklen; if (ps->pwrite != pp) png_error(pp, "store state damaged"); + /* Technically this is legal, but in practice libpng never writes more than + * the maximum chunk size at once so if it happens something weird has + * changed inside libpng (probably). + */ + if (st > 0x7fffffffU) + png_error(pp, "unexpected write size"); + + /* Now process the bytes to be written. Do this in units of the space in the + * output (write) buffer or, at the start 4 bytes for the chunk type and + * length limited in any case by the amount of data. + */ while (st > 0) { - size_t cb; + if (writepos >= STORE_BUFFER_SIZE) + store_storenew(ps), writepos = 0; - if (ps->writepos >= STORE_BUFFER_SIZE) - store_storenew(ps); + if (chunkpos < 4) + { + png_byte b = *pb++; + --st; + chunklen = (chunklen << 8) + b; + ps->new.buffer[writepos++] = b; + ++chunkpos; + } - cb = st; + else if (chunkpos < 8) + { + png_byte b = *pb++; + --st; + chunktype = (chunktype << 8) + b; + ps->new.buffer[writepos++] = b; - if (cb > STORE_BUFFER_SIZE - ps->writepos) - cb = STORE_BUFFER_SIZE - ps->writepos; + if (++chunkpos == 8) + { + chunklen &= 0xffffffffU; + if (chunklen > 0x7fffffffU) + png_error(pp, "chunk length too great"); - memcpy(ps->new.buffer + ps->writepos, pb, cb); - pb += cb; - st -= cb; - ps->writepos += cb; - } + chunktype &= 0xffffffffU; + if (chunktype == CHUNK_IDAT) + { + if (chunklen > ~ps->IDAT_size) + png_error(pp, "pngvalid internal image too large"); + + ps->IDAT_size += chunklen; + } + + else if (!valid_chunktype(chunktype)) + png_error(pp, "invalid chunk type"); + + chunklen += 12; /* for header and CRC */ + } + } + + else /* chunkpos >= 8 */ + { + size_t cb = st; + + if (cb > STORE_BUFFER_SIZE - writepos) + cb = STORE_BUFFER_SIZE - writepos; + + if (cb > chunklen - chunkpos/* bytes left in chunk*/) + cb = (size_t)/*SAFE*/(chunklen - chunkpos); + + memcpy(ps->new.buffer + writepos, pb, cb); + chunkpos += (png_uint_32)/*SAFE*/cb; + pb += cb; + writepos += cb; + st -= cb; + + if (chunkpos >= chunklen) /* must be equal */ + chunkpos = chunktype = chunklen = 0; + } + } /* while (st > 0) */ + + ps->writepos = writepos; + ps->chunkpos = chunkpos; + ps->chunktype = chunktype; + ps->chunklen = chunklen; } -static void -store_flush(png_structp pp) +static void PNGCBAPI +store_flush(png_structp ppIn) { - UNUSED(pp) /*DOES NOTHING*/ + UNUSED(ppIn) /*DOES NOTHING*/ } +#ifdef PNG_READ_SUPPORTED static size_t store_read_buffer_size(png_store *ps) { @@ -1067,7 +1389,6 @@ store_read_buffer_size(png_store *ps) return ps->current->datacount; } -#ifdef PNG_READ_TRANSFORMS_SUPPORTED /* Return total bytes available for read. */ static size_t store_read_buffer_avail(png_store *ps) @@ -1092,7 +1413,6 @@ store_read_buffer_avail(png_store *ps) return 0; } -#endif static int store_read_buffer_next(png_store *ps) @@ -1121,7 +1441,7 @@ store_read_buffer_next(png_store *ps) * during progressive read, where the io_ptr is set internally by libpng. */ static void -store_read_imp(png_store *ps, png_bytep pb, png_size_t st) +store_read_imp(png_store *ps, png_bytep pb, size_t st) { if (ps->current == NULL || ps->next == NULL) png_error(ps->pread, "store state damaged"); @@ -1144,35 +1464,277 @@ store_read_imp(png_store *ps, png_bytep pb, png_size_t st) } } -static void -store_read(png_structp pp, png_bytep pb, png_size_t st) +static size_t +store_read_chunk(png_store *ps, png_bytep pb, size_t max, size_t min) { + png_uint_32 chunklen = ps->chunklen; + png_uint_32 chunktype = ps->chunktype; + png_uint_32 chunkpos = ps->chunkpos; + size_t st = max; + + if (st > 0) do + { + if (chunkpos >= chunklen) /* end of last chunk */ + { + png_byte buffer[8]; + + /* Read the header of the next chunk: */ + store_read_imp(ps, buffer, 8U); + chunklen = png_get_uint_32(buffer) + 12U; + chunktype = png_get_uint_32(buffer+4U); + chunkpos = 0U; /* Position read so far */ + } + + if (chunktype == CHUNK_IDAT) + { + png_uint_32 IDAT_pos = ps->IDAT_pos; + png_uint_32 IDAT_len = ps->IDAT_len; + png_uint_32 IDAT_size = ps->IDAT_size; + + /* The IDAT headers are constructed here; skip the input header. */ + if (chunkpos < 8U) + chunkpos = 8U; + + if (IDAT_pos == IDAT_len) + { + png_byte random = random_byte(); + + /* Make a new IDAT chunk, if IDAT_len is 0 this is the first IDAT, + * if IDAT_size is 0 this is the end. At present this is set up + * using a random number so that there is a 25% chance before + * the start of the first IDAT chunk being 0 length. + */ + if (IDAT_len == 0U) /* First IDAT */ + { + switch (random & 3U) + { + case 0U: IDAT_len = 12U; break; /* 0 bytes */ + case 1U: IDAT_len = 13U; break; /* 1 byte */ + default: IDAT_len = random_u32(); + IDAT_len %= IDAT_size; + IDAT_len += 13U; /* 1..IDAT_size bytes */ + break; + } + } + + else if (IDAT_size == 0U) /* all IDAT data read */ + { + /* The last (IDAT) chunk should be positioned at the CRC now: */ + if (chunkpos != chunklen-4U) + png_error(ps->pread, "internal: IDAT size mismatch"); + + /* The only option here is to add a zero length IDAT, this + * happens 25% of the time. Because of the check above + * chunklen-4U-chunkpos must be zero, we just need to skip the + * CRC now. + */ + if ((random & 3U) == 0U) + IDAT_len = 12U; /* Output another 0 length IDAT */ + + else + { + /* End of IDATs, skip the CRC to make the code above load the + * next chunk header next time round. + */ + png_byte buffer[4]; + + store_read_imp(ps, buffer, 4U); + chunkpos += 4U; + ps->IDAT_pos = IDAT_pos; + ps->IDAT_len = IDAT_len; + ps->IDAT_size = 0U; + continue; /* Read the next chunk */ + } + } + + else + { + /* Middle of IDATs, use 'random' to determine the number of bits + * to use in the IDAT length. + */ + IDAT_len = random_u32(); + IDAT_len &= (1U << (1U + random % ps->IDAT_bits)) - 1U; + if (IDAT_len > IDAT_size) + IDAT_len = IDAT_size; + IDAT_len += 12U; /* zero bytes may occur */ + } + + IDAT_pos = 0U; + ps->IDAT_crc = 0x35af061e; /* Ie: crc32(0UL, "IDAT", 4) */ + } /* IDAT_pos == IDAT_len */ + + if (IDAT_pos < 8U) /* Return the header */ do + { + png_uint_32 b; + unsigned int shift; + + if (IDAT_pos < 4U) + b = IDAT_len - 12U; + + else + b = CHUNK_IDAT; + + shift = 3U & IDAT_pos; + ++IDAT_pos; + + if (shift < 3U) + b >>= 8U*(3U-shift); + + *pb++ = 0xffU & b; + } + while (--st > 0 && IDAT_pos < 8); + + else if (IDAT_pos < IDAT_len - 4U) /* I.e not the CRC */ + { + if (chunkpos < chunklen-4U) + { + uInt avail = (uInt)-1; + + if (avail > (IDAT_len-4U) - IDAT_pos) + avail = (uInt)/*SAFE*/((IDAT_len-4U) - IDAT_pos); + + if (avail > st) + avail = (uInt)/*SAFE*/st; + + if (avail > (chunklen-4U) - chunkpos) + avail = (uInt)/*SAFE*/((chunklen-4U) - chunkpos); + + store_read_imp(ps, pb, avail); + ps->IDAT_crc = crc32(ps->IDAT_crc, pb, avail); + pb += (size_t)/*SAFE*/avail; + st -= (size_t)/*SAFE*/avail; + chunkpos += (png_uint_32)/*SAFE*/avail; + IDAT_size -= (png_uint_32)/*SAFE*/avail; + IDAT_pos += (png_uint_32)/*SAFE*/avail; + } + + else /* skip the input CRC */ + { + png_byte buffer[4]; + + store_read_imp(ps, buffer, 4U); + chunkpos += 4U; + } + } + + else /* IDAT crc */ do + { + uLong b = ps->IDAT_crc; + unsigned int shift = (IDAT_len - IDAT_pos); /* 4..1 */ + ++IDAT_pos; + + if (shift > 1U) + b >>= 8U*(shift-1U); + + *pb++ = 0xffU & b; + } + while (--st > 0 && IDAT_pos < IDAT_len); + + ps->IDAT_pos = IDAT_pos; + ps->IDAT_len = IDAT_len; + ps->IDAT_size = IDAT_size; + } + + else /* !IDAT */ + { + /* If there is still some pending IDAT data after the IDAT chunks have + * been processed there is a problem: + */ + if (ps->IDAT_len > 0 && ps->IDAT_size > 0) + png_error(ps->pread, "internal: missing IDAT data"); + + if (chunktype == CHUNK_IEND && ps->IDAT_len == 0U) + png_error(ps->pread, "internal: missing IDAT"); + + if (chunkpos < 8U) /* Return the header */ do + { + png_uint_32 b; + unsigned int shift; + + if (chunkpos < 4U) + b = chunklen - 12U; + + else + b = chunktype; + + shift = 3U & chunkpos; + ++chunkpos; + + if (shift < 3U) + b >>= 8U*(3U-shift); + + *pb++ = 0xffU & b; + } + while (--st > 0 && chunkpos < 8); + + else /* Return chunk bytes, including the CRC */ + { + size_t avail = st; + + if (avail > chunklen - chunkpos) + avail = (size_t)/*SAFE*/(chunklen - chunkpos); + + store_read_imp(ps, pb, avail); + pb += avail; + st -= avail; + chunkpos += (png_uint_32)/*SAFE*/avail; + + /* Check for end of chunk and end-of-file; don't try to read a new + * chunk header at this point unless instructed to do so by 'min'. + */ + if (chunkpos >= chunklen && max-st >= min && + store_read_buffer_avail(ps) == 0) + break; + } + } /* !IDAT */ + } + while (st > 0); + + ps->chunklen = chunklen; + ps->chunktype = chunktype; + ps->chunkpos = chunkpos; + + return st; /* space left */ +} + +static void PNGCBAPI +store_read(png_structp ppIn, png_bytep pb, size_t st) +{ + png_const_structp pp = ppIn; png_store *ps = voidcast(png_store*, png_get_io_ptr(pp)); if (ps == NULL || ps->pread != pp) png_error(pp, "bad store read call"); - store_read_imp(ps, pb, st); + store_read_chunk(ps, pb, st, st); } static void store_progressive_read(png_store *ps, png_structp pp, png_infop pi) { - /* Notice that a call to store_read will cause this function to fail because - * readpos will be set. - */ if (ps->pread != pp || ps->current == NULL || ps->next == NULL) png_error(pp, "store state damaged (progressive)"); - do + /* This is another Horowitz and Hill random noise generator. In this case + * the aim is to stress the progressive reader with truly horrible variable + * buffer sizes in the range 1..500, so a sequence of 9 bit random numbers + * is generated. We could probably just count from 1 to 32767 and get as + * good a result. + */ + while (store_read_buffer_avail(ps) > 0) { - if (ps->readpos != 0) - png_error(pp, "store_read called during progressive read"); + static png_uint_32 noise = 2; + size_t cb; + png_byte buffer[512]; - png_process_data(pp, pi, ps->next->buffer, store_read_buffer_size(ps)); + /* Generate 15 more bits of stuff: */ + noise = (noise << 9) | ((noise ^ (noise >> (9-5))) & 0x1ff); + cb = noise & 0x1ff; + cb -= store_read_chunk(ps, buffer, cb, 1); + png_process_data(pp, pi, buffer, cb); } - while (store_read_buffer_next(ps)); } +#endif /* PNG_READ_SUPPORTED */ /* The caller must fill this in: */ static store_palette_entry * @@ -1199,6 +1761,7 @@ store_write_palette(png_store *ps, int npalette) return ps->palette; } +#ifdef PNG_READ_SUPPORTED static store_palette_entry * store_current_palette(png_store *ps, int *npalette) { @@ -1206,14 +1769,19 @@ store_current_palette(png_store *ps, int *npalette) * operation.) */ if (ps->current == NULL) + { store_log(ps, ps->pread, "no current stream for palette", 1); + return NULL; + } /* The result may be null if there is no palette. */ *npalette = ps->current->npalette; return ps->current->palette; } +#endif /* PNG_READ_SUPPORTED */ /***************************** MEMORY MANAGEMENT*** ***************************/ +#ifdef PNG_USER_MEM_SUPPORTED /* A store_memory is simply the header for an allocated block of memory. The * pointer returned to libpng is just after the end of the header block, the * allocated memory is followed by a second copy of the 'mark'. @@ -1234,7 +1802,7 @@ typedef struct store_memory * all the memory. */ static void -store_pool_error(png_store *ps, png_structp pp, PNG_CONST char *msg) +store_pool_error(png_store *ps, png_const_structp pp, const char *msg) { if (pp != NULL) png_error(pp, msg); @@ -1247,7 +1815,7 @@ store_pool_error(png_store *ps, png_structp pp, PNG_CONST char *msg) } static void -store_memory_free(png_structp pp, store_pool *pool, store_memory *memory) +store_memory_free(png_const_structp pp, store_pool *pool, store_memory *memory) { /* Note that pp may be NULL (see store_pool_delete below), the caller has * found 'memory' in pool->list *and* unlinked this entry, so this is a valid @@ -1298,7 +1866,7 @@ store_pool_delete(png_store *ps, store_pool *pool) next->next = NULL; fprintf(stderr, "\t%lu bytes @ %p\n", - (unsigned long)next->size, (PNG_CONST void*)(next+1)); + (unsigned long)next->size, (const void*)(next+1)); /* The NULL means this will always return, even if the memory is * corrupted. */ @@ -1332,9 +1900,10 @@ store_pool_delete(png_store *ps, store_pool *pool) } /* The memory callbacks: */ -static png_voidp -store_malloc(png_structp pp, png_alloc_size_t cb) +static png_voidp PNGCBAPI +store_malloc(png_structp ppIn, png_alloc_size_t cb) { + png_const_structp pp = ppIn; store_pool *pool = voidcast(store_pool*, png_get_mem_ptr(pp)); store_memory *new = voidcast(store_memory*, malloc(cb + (sizeof *new) + (sizeof pool->mark))); @@ -1380,9 +1949,10 @@ store_malloc(png_structp pp, png_alloc_size_t cb) return new; } -static void -store_free(png_structp pp, png_voidp memory) +static void PNGCBAPI +store_free(png_structp ppIn, png_voidp memory) { + png_const_structp pp = ppIn; store_pool *pool = voidcast(store_pool*, png_get_mem_ptr(pp)); store_memory *this = voidcast(store_memory*, memory), **test; @@ -1412,6 +1982,7 @@ store_free(png_structp pp, png_voidp memory) this->next = NULL; store_memory_free(pp, pool, this); } +#endif /* PNG_USER_MEM_SUPPORTED */ /* Setup functions. */ /* Cleanup when aborting a write or after storing the new file. */ @@ -1437,7 +2008,9 @@ store_write_reset(png_store *ps) /* And make sure that all the memory has been freed - this will output * spurious errors in the case of memory corruption above, but this is safe. */ - store_pool_delete(ps, &ps->write_memory_pool); +# ifdef PNG_USER_MEM_SUPPORTED + store_pool_delete(ps, &ps->write_memory_pool); +# endif store_freenew(ps); } @@ -1448,8 +2021,7 @@ store_write_reset(png_store *ps) * returned libpng structures as destroyed by store_write_reset above. */ static png_structp -set_store_for_write(png_store *ps, png_infopp ppi, - PNG_CONST char * volatile name) +set_store_for_write(png_store *ps, png_infopp ppi, const char *name) { anon_context(ps); @@ -1461,18 +2033,32 @@ set_store_for_write(png_store *ps, png_infopp ppi, store_write_reset(ps); safecat(ps->wname, sizeof ps->wname, 0, name); - /* Don't do the slow memory checks if doing a speed test. */ - if (ps->speed) + /* Don't do the slow memory checks if doing a speed test, also if user + * memory is not supported we can't do it anyway. + */ +# ifdef PNG_USER_MEM_SUPPORTED + if (!ps->speed) + ps->pwrite = png_create_write_struct_2(PNG_LIBPNG_VER_STRING, + ps, store_error, store_warning, &ps->write_memory_pool, + store_malloc, store_free); + + else +# endif ps->pwrite = png_create_write_struct(PNG_LIBPNG_VER_STRING, ps, store_error, store_warning); - else - ps->pwrite = png_create_write_struct_2(PNG_LIBPNG_VER_STRING, - ps, store_error, store_warning, &ps->write_memory_pool, - store_malloc, store_free); - png_set_write_fn(ps->pwrite, ps, store_write, store_flush); +# ifdef PNG_SET_OPTION_SUPPORTED + { + int opt; + for (opt=0; optnoptions; ++opt) + if (png_set_option(ps->pwrite, ps->options[opt].option, + ps->options[opt].setting) == PNG_OPTION_INVALID) + png_error(ps->pwrite, "png option invalid"); + } +# endif + if (ppi != NULL) *ppi = ps->piwrite = png_create_info_struct(ps->pwrite); } @@ -1484,35 +2070,47 @@ set_store_for_write(png_store *ps, png_infopp ppi, } /* Cleanup when finished reading (either due to error or in the success case). + * This routine exists even when there is no read support to make the code + * tidier (avoid a mass of ifdefs) and so easier to maintain. */ static void store_read_reset(png_store *ps) { - if (ps->pread != NULL) - { - anon_context(ps); - - Try - png_destroy_read_struct(&ps->pread, &ps->piread, NULL); - - Catch_anonymous +# ifdef PNG_READ_SUPPORTED + if (ps->pread != NULL) { - /* error already output: continue */ + anon_context(ps); + + Try + png_destroy_read_struct(&ps->pread, &ps->piread, NULL); + + Catch_anonymous + { + /* error already output: continue */ + } + + ps->pread = NULL; + ps->piread = NULL; } +# endif - ps->pread = NULL; - ps->piread = NULL; - } - - /* Always do this to be safe. */ - store_pool_delete(ps, &ps->read_memory_pool); +# ifdef PNG_USER_MEM_SUPPORTED + /* Always do this to be safe. */ + store_pool_delete(ps, &ps->read_memory_pool); +# endif ps->current = NULL; ps->next = NULL; ps->readpos = 0; ps->validated = 0; + + ps->chunkpos = 8; + ps->chunktype = 0; + ps->chunklen = 16; + ps->IDAT_size = 0; } +#ifdef PNG_READ_SUPPORTED static void store_read_set(png_store *ps, png_uint_32 id) { @@ -1524,6 +2122,11 @@ store_read_set(png_store *ps, png_uint_32 id) { ps->current = pf; ps->next = NULL; + ps->IDAT_size = pf->IDAT_size; + ps->IDAT_bits = pf->IDAT_bits; /* just a cache */ + ps->IDAT_len = 0; + ps->IDAT_pos = 0; + ps->IDAT_crc = 0UL; store_read_buffer_next(ps); return; } @@ -1531,14 +2134,14 @@ store_read_set(png_store *ps, png_uint_32 id) pf = pf->next; } - { + { size_t pos; char msg[FILE_NAME_SIZE+64]; pos = standard_name_from_id(msg, sizeof msg, 0, id); pos = safecat(msg, sizeof msg, pos, ": file not found"); png_error(ps->pread, msg); - } + } } /* The main interface for reading a saved file - pass the id number of the file @@ -1548,7 +2151,7 @@ store_read_set(png_store *ps, png_uint_32 id) */ static png_structp set_store_for_read(png_store *ps, png_infopp ppi, png_uint_32 id, - PNG_CONST char *name) + const char *name) { /* Set the name for png_error */ safecat(ps->test, sizeof ps->test, 0, name); @@ -1564,14 +2167,16 @@ set_store_for_read(png_store *ps, png_infopp ppi, png_uint_32 id, * However, given that store_error works correctly in these circumstances * we don't ever expect NULL in this program. */ - if (ps->speed) - ps->pread = png_create_read_struct(PNG_LIBPNG_VER_STRING, ps, - store_error, store_warning); +# ifdef PNG_USER_MEM_SUPPORTED + if (!ps->speed) + ps->pread = png_create_read_struct_2(PNG_LIBPNG_VER_STRING, ps, + store_error, store_warning, &ps->read_memory_pool, store_malloc, + store_free); - else - ps->pread = png_create_read_struct_2(PNG_LIBPNG_VER_STRING, ps, - store_error, store_warning, &ps->read_memory_pool, store_malloc, - store_free); + else +# endif + ps->pread = png_create_read_struct(PNG_LIBPNG_VER_STRING, ps, store_error, + store_warning); if (ps->pread == NULL) { @@ -1583,6 +2188,16 @@ set_store_for_read(png_store *ps, png_infopp ppi, png_uint_32 id, Throw ps; } +# ifdef PNG_SET_OPTION_SUPPORTED + { + int opt; + for (opt=0; optnoptions; ++opt) + if (png_set_option(ps->pread, ps->options[opt].option, + ps->options[opt].setting) == PNG_OPTION_INVALID) + png_error(ps->pread, "png option invalid"); + } +# endif + store_read_set(ps, id); if (ppi != NULL) @@ -1590,6 +2205,7 @@ set_store_for_read(png_store *ps, png_infopp ppi, png_uint_32 id, return ps->pread; } +#endif /* PNG_READ_SUPPORTED */ /* The overall cleanup of a store simply calls the above then removes all the * saved files. This does not delete the store itself. @@ -1629,18 +2245,6 @@ typedef struct CIE_color double X, Y, Z; } CIE_color; -static double -chromaticity_x(CIE_color c) -{ - return c.X / (c.X + c.Y + c.Z); -} - -static double -chromaticity_y(CIE_color c) -{ - return c.Y / (c.X + c.Y + c.Z); -} - typedef struct color_encoding { /* A description of an (R,G,B) encoding of color (as defined above); this @@ -1653,22 +2257,38 @@ typedef struct color_encoding CIE_color red, green, blue; /* End points */ } color_encoding; +#ifdef PNG_READ_SUPPORTED +#if defined PNG_READ_TRANSFORMS_SUPPORTED && defined PNG_READ_cHRM_SUPPORTED +static double +chromaticity_x(CIE_color c) +{ + return c.X / (c.X + c.Y + c.Z); +} + +static double +chromaticity_y(CIE_color c) +{ + return c.Y / (c.X + c.Y + c.Z); +} + static CIE_color -white_point(PNG_CONST color_encoding *encoding) +white_point(const color_encoding *encoding) { CIE_color white; - + white.X = encoding->red.X + encoding->green.X + encoding->blue.X; white.Y = encoding->red.Y + encoding->green.Y + encoding->blue.Y; white.Z = encoding->red.Z + encoding->green.Z + encoding->blue.Z; return white; } +#endif /* READ_TRANSFORMS && READ_cHRM */ +#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED static void normalize_color_encoding(color_encoding *encoding) { - PNG_CONST double whiteY = encoding->red.Y + encoding->green.Y + + const double whiteY = encoding->red.Y + encoding->green.Y + encoding->blue.Y; if (whiteY != 1) @@ -1684,10 +2304,12 @@ normalize_color_encoding(color_encoding *encoding) encoding->blue.Z /= whiteY; } } +#endif +#ifdef PNG_READ_TRANSFORMS_SUPPORTED static size_t safecat_color_encoding(char *buffer, size_t bufsize, size_t pos, - PNG_CONST color_encoding *e, double encoding_gamma) + const color_encoding *e, double encoding_gamma) { if (e != 0) { @@ -1724,6 +2346,8 @@ safecat_color_encoding(char *buffer, size_t bufsize, size_t pos, return pos; } +#endif /* READ_TRANSFORMS */ +#endif /* PNG_READ_SUPPORTED */ typedef struct png_modifier { @@ -1747,9 +2371,9 @@ typedef struct png_modifier unsigned int ngammas; unsigned int ngamma_tests; /* Number of gamma tests to run*/ double current_gamma; /* 0 if not set */ - PNG_CONST color_encoding *encodings; + const color_encoding *encodings; unsigned int nencodings; - PNG_CONST color_encoding *current_encoding; /* If an encoding has been set */ + const color_encoding *current_encoding; /* If an encoding has been set */ unsigned int encoding_counter; /* For iteration */ int encoding_ignored; /* Something overwrote it */ @@ -1760,7 +2384,7 @@ typedef struct png_modifier unsigned int repeat :1; /* Repeat this transform test. */ unsigned int test_uses_encoding :1; - /* Lowest sbit to test (libpng fails for sbit < 8) */ + /* Lowest sbit to test (pre-1.7 libpng fails for sbit < 8) */ png_byte sbitlow; /* Error control - these are the limits on errors accepted by the gamma tests @@ -1773,12 +2397,15 @@ typedef struct png_modifier double maxout16; /* Maximum output value error */ double maxabs16; /* Absolute sample error 0..1 */ double maxcalc16;/* Absolute sample error 0..1 */ + double maxcalcG; /* Absolute sample error 0..1 */ double maxpc16; /* Percentage sample error 0..100% */ /* This is set by transforms that need to allow a higher limit, it is an * internal check on pngvalid to ensure that the calculated error limits are * not ridiculous; without this it is too easy to make a mistake in pngvalid * that allows any value through. + * + * NOTE: this is not checked in release builds. */ double limit; /* limit on error values, normally 4E-3 */ @@ -1812,10 +2439,16 @@ typedef struct png_modifier /* Run the odd-sized image and interlace read/write tests? */ unsigned int test_size :1; - /* Run tests on reading with a combiniation of transforms, */ + /* Run tests on reading with a combination of transforms, */ unsigned int test_transform :1; + unsigned int test_tRNS :1; /* Includes tRNS images */ - /* When to use the use_input_precision option: */ + /* When to use the use_input_precision option, this controls the gamma + * validation code checks. If set any value that is within the transformed + * range input-.5 to input+.5 will be accepted, otherwise the value must be + * within the normal limits. It should not be necessary to set this; the + * result should always be exact within the permitted error limits. + */ unsigned int use_input_precision :1; unsigned int use_input_precision_sbit :1; unsigned int use_input_precision_16to8 :1; @@ -1825,8 +2458,8 @@ typedef struct png_modifier */ unsigned int calculations_use_input_precision :1; - /* If set assume that the calculations are done in 16 bits even if both input - * and output are 8 bit or less. + /* If set assume that the calculations are done in 16 bits even if the sample + * depth is 8 bits. */ unsigned int assume_16_bit_calculations :1; @@ -1840,6 +2473,16 @@ typedef struct png_modifier unsigned int test_gamma_expand16 :1; unsigned int test_exhaustive :1; + /* Whether or not to run the low-bit-depth grayscale tests. This fails on + * gamma images in some cases because of gross inaccuracies in the grayscale + * gamma handling for low bit depth. + */ + unsigned int test_lbg :1; + unsigned int test_lbg_gamma_threshold :1; + unsigned int test_lbg_gamma_transform :1; + unsigned int test_lbg_gamma_sbit :1; + unsigned int test_lbg_gamma_composition :1; + unsigned int log :1; /* Log max error */ /* Buffer information, the buffer size limits the size of the chunks that can @@ -1853,7 +2496,7 @@ typedef struct png_modifier /* This returns true if the test should be stopped now because it has already * failed and it is running silently. - */ + */ static int fail(png_modifier *pm) { return !pm->log && !pm->this.verbose && (pm->this.nerrors > 0 || @@ -1881,6 +2524,7 @@ modifier_init(png_modifier *pm) pm->test_uses_encoding = 0; pm->maxout8 = pm->maxpc8 = pm->maxabs8 = pm->maxcalc8 = 0; pm->maxout16 = pm->maxpc16 = pm->maxabs16 = pm->maxcalc16 = 0; + pm->maxcalcG = 0; pm->limit = 4E-3; pm->log8 = pm->log16 = 0; /* Means 'off' */ pm->error_gray_2 = pm->error_gray_4 = pm->error_gray_8 = 0; @@ -1891,10 +2535,16 @@ modifier_init(png_modifier *pm) pm->test_standard = 0; pm->test_size = 0; pm->test_transform = 0; +# ifdef PNG_WRITE_tRNS_SUPPORTED + pm->test_tRNS = 1; +# else + pm->test_tRNS = 0; +# endif pm->use_input_precision = 0; pm->use_input_precision_sbit = 0; pm->use_input_precision_16to8 = 0; pm->calculations_use_input_precision = 0; + pm->assume_16_bit_calculations = 0; pm->test_gamma_threshold = 0; pm->test_gamma_transform = 0; pm->test_gamma_sbit = 0; @@ -1902,6 +2552,11 @@ modifier_init(png_modifier *pm) pm->test_gamma_background = 0; pm->test_gamma_alpha_mode = 0; pm->test_gamma_expand16 = 0; + pm->test_lbg = 1; + pm->test_lbg_gamma_threshold = 1; + pm->test_lbg_gamma_transform = 1; + pm->test_lbg_gamma_sbit = 1; + pm->test_lbg_gamma_composition = 1; pm->test_exhaustive = 0; pm->log = 0; @@ -1909,16 +2564,25 @@ modifier_init(png_modifier *pm) } #ifdef PNG_READ_TRANSFORMS_SUPPORTED + +/* This controls use of checks that explicitly know how libpng digitizes the + * samples in calculations; setting this circumvents simple error limit checking + * in the rgb_to_gray check, replacing it with an exact copy of the libpng 1.5 + * algorithm. + */ +#define DIGITIZE PNG_LIBPNG_VER < 10700 + /* If pm->calculations_use_input_precision is set then operations will happen - * with only 8 bit precision unless both the input and output bit depth are 16. + * with the precision of the input, not the precision of the output depth. * * If pm->assume_16_bit_calculations is set then even 8 bit calculations use 16 * bit precision. This only affects those of the following limits that pertain * to a calculation - not a digitization operation - unless the following API is * called directly. */ -static double digitize(PNG_CONST png_modifier *pm, double value, - int sample_depth, int do_round) +#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED +#if DIGITIZE +static double digitize(double value, int depth, int do_round) { /* 'value' is in the range 0 to 1, the result is the same value rounded to a * multiple of the digitization factor - 8 or 16 bits depending on both the @@ -1926,14 +2590,14 @@ static double digitize(PNG_CONST png_modifier *pm, double value, * rounding and 'do_round' should be 1, if it is 0 the digitized value will * be truncated. */ - PNG_CONST unsigned int digitization_factor = - (pm->assume_16_bit_calculations || sample_depth == 16) ? 65535 : 255; + unsigned int digitization_factor = (1U << depth) - 1; /* Limiting the range is done as a convenience to the caller - it's easier to * do it once here than every time at the call site. */ if (value <= 0) value = 0; + else if (value >= 1) value = 1; @@ -1941,38 +2605,42 @@ static double digitize(PNG_CONST png_modifier *pm, double value, if (do_round) value += .5; return floor(value)/digitization_factor; } +#endif +#endif /* RGB_TO_GRAY */ -static double abserr(PNG_CONST png_modifier *pm, int in_depth, int out_depth) +#ifdef PNG_READ_GAMMA_SUPPORTED +static double abserr(const png_modifier *pm, int in_depth, int out_depth) { /* Absolute error permitted in linear values - affected by the bit depth of * the calculations. */ - if (pm->assume_16_bit_calculations || (out_depth == 16 && (in_depth == 16 || - !pm->calculations_use_input_precision))) + if (pm->assume_16_bit_calculations || + (pm->calculations_use_input_precision ? in_depth : out_depth) == 16) return pm->maxabs16; else return pm->maxabs8; } -static double calcerr(PNG_CONST png_modifier *pm, int in_depth, int out_depth) +static double calcerr(const png_modifier *pm, int in_depth, int out_depth) { /* Error in the linear composition arithmetic - only relevant when * composition actually happens (0 < alpha < 1). */ - if (pm->assume_16_bit_calculations || (out_depth == 16 && (in_depth == 16 || - !pm->calculations_use_input_precision))) + if ((pm->calculations_use_input_precision ? in_depth : out_depth) == 16) return pm->maxcalc16; + else if (pm->assume_16_bit_calculations) + return pm->maxcalcG; else return pm->maxcalc8; } -static double pcerr(PNG_CONST png_modifier *pm, int in_depth, int out_depth) +static double pcerr(const png_modifier *pm, int in_depth, int out_depth) { /* Percentage error permitted in the linear values. Note that the specified * value is a percentage but this routine returns a simple number. */ - if (pm->assume_16_bit_calculations || (out_depth == 16 && (in_depth == 16 || - !pm->calculations_use_input_precision))) + if (pm->assume_16_bit_calculations || + (pm->calculations_use_input_precision ? in_depth : out_depth) == 16) return pm->maxpc16 * .01; else return pm->maxpc8 * .01; @@ -1989,7 +2657,7 @@ static double pcerr(PNG_CONST png_modifier *pm, int in_depth, int out_depth) * The specified parameter does *not* include the base .5 digitization error but * it is added here. */ -static double outerr(PNG_CONST png_modifier *pm, int in_depth, int out_depth) +static double outerr(const png_modifier *pm, int in_depth, int out_depth) { /* There is a serious error in the 2 and 4 bit grayscale transform because * the gamma table value (8 bits) is simply shifted, not rounded, so the @@ -2004,8 +2672,7 @@ static double outerr(PNG_CONST png_modifier *pm, int in_depth, int out_depth) if (out_depth == 4) return .90644-.5; - if (out_depth == 16 && (in_depth == 16 || - !pm->calculations_use_input_precision)) + if ((pm->calculations_use_input_precision ? in_depth : out_depth) == 16) return pm->maxout16; /* This is the case where the value was calculated at 8-bit precision then @@ -2022,7 +2689,7 @@ static double outerr(PNG_CONST png_modifier *pm, int in_depth, int out_depth) * rather than raising a warning. This is useful for debugging to track down * exactly what set of parameters cause high error values. */ -static double outlog(PNG_CONST png_modifier *pm, int in_depth, int out_depth) +static double outlog(const png_modifier *pm, int in_depth, int out_depth) { /* The command line parameters are either 8 bit (0..255) or 16 bit (0..65535) * and so must be adjusted for low bit depth grayscale: @@ -2038,8 +2705,7 @@ static double outlog(PNG_CONST png_modifier *pm, int in_depth, int out_depth) return pm->log8; } - if (out_depth == 16 && (in_depth == 16 || - !pm->calculations_use_input_precision)) + if ((pm->calculations_use_input_precision ? in_depth : out_depth) == 16) { if (pm->log16 == 0) return 65536; @@ -2061,15 +2727,16 @@ static double outlog(PNG_CONST png_modifier *pm, int in_depth, int out_depth) * but in the 8 bit calculation case it's actually quantization to a multiple of * 257! */ -static int output_quantization_factor(PNG_CONST png_modifier *pm, int in_depth, +static int output_quantization_factor(const png_modifier *pm, int in_depth, int out_depth) { - if (out_depth == 16 && in_depth != 16 - && pm->calculations_use_input_precision) + if (out_depth == 16 && in_depth != 16 && + pm->calculations_use_input_precision) return 257; else return 1; } +#endif /* PNG_READ_GAMMA_SUPPORTED */ /* One modification structure must be provided for each chunk to be modified (in * fact more than one can be provided if multiple separate changes are desired @@ -2122,8 +2789,9 @@ modification_init(png_modification *pmm) modification_reset(pmm); } +#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED static void -modifier_current_encoding(PNG_CONST png_modifier *pm, color_encoding *ce) +modifier_current_encoding(const png_modifier *pm, color_encoding *ce) { if (pm->current_encoding != 0) *ce = *pm->current_encoding; @@ -2133,10 +2801,12 @@ modifier_current_encoding(PNG_CONST png_modifier *pm, color_encoding *ce) ce->gamma = pm->current_gamma; } +#endif +#ifdef PNG_READ_TRANSFORMS_SUPPORTED static size_t safecat_current_encoding(char *buffer, size_t bufsize, size_t pos, - PNG_CONST png_modifier *pm) + const png_modifier *pm) { pos = safecat_color_encoding(buffer, bufsize, pos, pm->current_encoding, pm->current_gamma); @@ -2146,6 +2816,7 @@ safecat_current_encoding(char *buffer, size_t bufsize, size_t pos, return pos; } +#endif /* Iterate through the usefully testable color encodings. An encoding is one * of: @@ -2165,7 +2836,7 @@ safecat_current_encoding(char *buffer, size_t bufsize, size_t pos, * caller of modifier_reset must reset it at the start of each run of the test! */ static unsigned int -modifier_total_encodings(PNG_CONST png_modifier *pm) +modifier_total_encodings(const png_modifier *pm) { return 1 + /* (1) nothing */ pm->ngammas + /* (2) gamma values to test */ @@ -2281,29 +2952,18 @@ modifier_set_encoding(png_modifier *pm) * assumption below that the first encoding in the list is the one for sRGB. */ static int -modifier_color_encoding_is_sRGB(PNG_CONST png_modifier *pm) +modifier_color_encoding_is_sRGB(const png_modifier *pm) { return pm->current_encoding != 0 && pm->current_encoding == pm->encodings && pm->current_encoding->gamma == pm->current_gamma; } static int -modifier_color_encoding_is_set(PNG_CONST png_modifier *pm) +modifier_color_encoding_is_set(const png_modifier *pm) { return pm->current_gamma != 0; } -/* Convenience macros. */ -#define CHUNK(a,b,c,d) (((a)<<24)+((b)<<16)+((c)<<8)+(d)) -#define CHUNK_IHDR CHUNK(73,72,68,82) -#define CHUNK_PLTE CHUNK(80,76,84,69) -#define CHUNK_IDAT CHUNK(73,68,65,84) -#define CHUNK_IEND CHUNK(73,69,78,68) -#define CHUNK_cHRM CHUNK(99,72,82,77) -#define CHUNK_gAMA CHUNK(103,65,77,65) -#define CHUNK_sBIT CHUNK(115,66,73,84) -#define CHUNK_sRGB CHUNK(115,82,71,66) - /* The guts of modification are performed during a read. */ static void modifier_crc(png_bytep buffer) @@ -2331,7 +2991,7 @@ modifier_setbuffer(png_modifier *pm) * png_struct. */ static void -modifier_read_imp(png_modifier *pm, png_bytep pb, png_size_t st) +modifier_read_imp(png_modifier *pm, png_bytep pb, size_t st) { while (st > 0) { @@ -2343,7 +3003,7 @@ modifier_read_imp(png_modifier *pm, png_bytep pb, png_size_t st) { static png_byte sign[8] = { 137, 80, 78, 71, 13, 10, 26, 10 }; case modifier_start: - store_read_imp(&pm->this, pm->buffer, 8); /* size of signature. */ + store_read_chunk(&pm->this, pm->buffer, 8, 8); /* signature. */ pm->buffer_count = 8; pm->buffer_position = 0; @@ -2353,7 +3013,7 @@ modifier_read_imp(png_modifier *pm, png_bytep pb, png_size_t st) break; case modifier_signature: - store_read_imp(&pm->this, pm->buffer, 13+12); /* size of IHDR */ + store_read_chunk(&pm->this, pm->buffer, 13+12, 13+12); /* IHDR */ pm->buffer_count = 13+12; pm->buffer_position = 0; @@ -2394,7 +3054,7 @@ modifier_read_imp(png_modifier *pm, png_bytep pb, png_size_t st) { if (cb > st) cb = st; pm->flush -= cb; - store_read_imp(&pm->this, pb, cb); + store_read_chunk(&pm->this, pb, cb, cb); pb += cb; st -= cb; if (st == 0) return; @@ -2411,7 +3071,7 @@ modifier_read_imp(png_modifier *pm, png_bytep pb, png_size_t st) pm->pending_chunk = 0; } else - store_read_imp(&pm->this, pm->buffer, 8); + store_read_chunk(&pm->this, pm->buffer, 8, 8); pm->buffer_count = 8; pm->buffer_position = 0; @@ -2477,8 +3137,8 @@ modifier_read_imp(png_modifier *pm, png_bytep pb, png_size_t st) */ if (len+12 <= sizeof pm->buffer) { - store_read_imp(&pm->this, pm->buffer+pm->buffer_count, - len+12-pm->buffer_count); + size_t s = len+12-pm->buffer_count; + store_read_chunk(&pm->this, pm->buffer+pm->buffer_count, s, s); pm->buffer_count = len+12; /* Check for a modification, else leave it be. */ @@ -2535,9 +3195,10 @@ modifier_read_imp(png_modifier *pm, png_bytep pb, png_size_t st) } /* The callback: */ -static void -modifier_read(png_structp pp, png_bytep pb, png_size_t st) +static void PNGCBAPI +modifier_read(png_structp ppIn, png_bytep pb, size_t st) { + png_const_structp pp = ppIn; png_modifier *pm = voidcast(png_modifier*, png_get_io_ptr(pp)); if (pm == NULL || pm->this.pread != pp) @@ -2565,7 +3226,7 @@ modifier_progressive_read(png_modifier *pm, png_structp pp, png_infop pi) for (;;) { static png_uint_32 noise = 1; - png_size_t cb, cbAvail; + size_t cb, cbAvail; png_byte buffer[512]; /* Generate 15 more bits of stuff: */ @@ -2606,7 +3267,7 @@ modifier_progressive_read(png_modifier *pm, png_structp pp, png_infop pi) /* Set up a modifier. */ static png_structp set_modifier_for_read(png_modifier *pm, png_infopp ppi, png_uint_32 id, - PNG_CONST char *name) + const char *name) { /* Do this first so that the modifier fields are cleared even if an error * happens allocating the png_struct. No allocation is done here so no @@ -2666,7 +3327,7 @@ gama_modification_init(gama_modification *me, png_modifier *pm, double gammad) typedef struct chrm_modification { png_modification this; - PNG_CONST color_encoding *encoding; + const color_encoding *encoding; png_fixed_point wx, wy, rx, ry, gx, gy, bx, by; } chrm_modification; @@ -2690,7 +3351,7 @@ chrm_modify(png_modifier *pm, png_modification *me, int add) static void chrm_modification_init(chrm_modification *me, png_modifier *pm, - PNG_CONST color_encoding *encoding) + const color_encoding *encoding) { CIE_color white = white_point(encoding); @@ -2757,6 +3418,7 @@ srgb_modification_init(srgb_modification *me, png_modifier *pm, png_byte intent) pm->modifications = &me->this; } +#ifdef PNG_READ_GAMMA_SUPPORTED typedef struct sbit_modification { png_modification this; @@ -2823,6 +3485,7 @@ sbit_modification_init(sbit_modification *me, png_modifier *pm, png_byte sbit) me->this.next = pm->modifications; pm->modifications = &me->this; } +#endif /* PNG_READ_GAMMA_SUPPORTED */ #endif /* PNG_READ_TRANSFORMS_SUPPORTED */ /***************************** STANDARD PNG FILES *****************************/ @@ -2852,6 +3515,12 @@ sbit_modification_init(sbit_modification *me, png_modifier *pm, png_byte sbit) * height of 16 rows. The width and height are stored in the FILEID and, being * non-zero, indicate a size file. * + * Because the PNG filter code is typically the largest CPU consumer within + * libpng itself there is a tendency to attempt to optimize it. This results in + * special case code which needs to be validated. To cause this to happen the + * 'size' images are made to use each possible filter, in so far as this is + * possible for smaller images. + * * For palette image (colour type 3) multiple transform images are stored with * the same bit depth to allow testing of more colour combinations - * particularly important for testing the gamma code because libpng uses a @@ -2884,9 +3553,9 @@ make_standard_palette(png_store* ps, int npalette, int do_tRNS) */ for (; i<8; ++i) { - values[i][1] = (i&1) ? 255 : 0; - values[i][2] = (i&2) ? 255 : 0; - values[i][3] = (i&4) ? 255 : 0; + values[i][1] = (png_byte)((i&1) ? 255U : 0U); + values[i][2] = (png_byte)((i&2) ? 255U : 0U); + values[i][3] = (png_byte)((i&4) ? 255U : 0U); } /* Then add 62 grays (one quarter of the remaining 256 slots). */ @@ -2970,6 +3639,7 @@ make_standard_palette(png_store* ps, int npalette, int do_tRNS) /* Initialize a standard palette on a write stream. The 'do_tRNS' argument * indicates whether or not to also set the tRNS chunk. */ +/* TODO: the png_structp here can probably be 'const' in the future */ static void init_standard_palette(png_store *ps, png_structp pp, png_infop pi, int npalette, int do_tRNS) @@ -3009,16 +3679,63 @@ init_standard_palette(png_store *ps, png_structp pp, png_infop pi, int npalette, for (; i<256; ++i) tRNS[i] = 24; +#ifdef PNG_WRITE_tRNS_SUPPORTED if (j > 0) png_set_tRNS(pp, pi, tRNS, j, 0/*color*/); +#endif } } +#ifdef PNG_WRITE_tRNS_SUPPORTED +static void +set_random_tRNS(png_structp pp, png_infop pi, png_byte colour_type, + int bit_depth) +{ + /* To make this useful the tRNS color needs to match at least one pixel. + * Random values are fine for gray, including the 16-bit case where we know + * that the test image contains all the gray values. For RGB we need more + * method as only 65536 different RGB values are generated. + */ + png_color_16 tRNS; + png_uint_16 mask = (png_uint_16)((1U << bit_depth)-1); + + R8(tRNS); /* makes unset fields random */ + + if (colour_type & 2/*RGB*/) + { + if (bit_depth == 8) + { + tRNS.red = random_u16(); + tRNS.green = random_u16(); + tRNS.blue = tRNS.red ^ tRNS.green; + tRNS.red &= mask; + tRNS.green &= mask; + tRNS.blue &= mask; + } + + else /* bit_depth == 16 */ + { + tRNS.red = random_u16(); + tRNS.green = (png_uint_16)(tRNS.red * 257); + tRNS.blue = (png_uint_16)(tRNS.green * 17); + } + } + + else + { + tRNS.gray = random_u16(); + tRNS.gray &= mask; + } + + png_set_tRNS(pp, pi, NULL, 0, &tRNS); +} +#endif + /* The number of passes is related to the interlace type. There was no libpng * API to determine this prior to 1.5, so we need an inquiry function: */ static int -npasses_from_interlace_type(png_structp pp, int interlace_type) +npasses_from_interlace_type(png_const_structp pp, int interlace_type) { switch (interlace_type) { @@ -3034,7 +3751,7 @@ npasses_from_interlace_type(png_structp pp, int interlace_type) } static unsigned int -bit_size(png_structp pp, png_byte colour_type, png_byte bit_depth) +bit_size(png_const_structp pp, png_byte colour_type, png_byte bit_depth) { switch (colour_type) { @@ -3059,7 +3776,8 @@ bit_size(png_structp pp, png_byte colour_type, png_byte bit_depth) #define SIZE_HEIGHTMAX 16 /* Maximum range of size images */ static size_t -transform_rowsize(png_structp pp, png_byte colour_type, png_byte bit_depth) +transform_rowsize(png_const_structp pp, png_byte colour_type, + png_byte bit_depth) { return (TRANSFORM_WIDTH * bit_size(pp, colour_type, bit_depth)) / 8; } @@ -3070,7 +3788,7 @@ transform_rowsize(png_structp pp, png_byte colour_type, png_byte bit_depth) #define transform_width(pp, colour_type, bit_depth) TRANSFORM_WIDTH static png_uint_32 -transform_height(png_structp pp, png_byte colour_type, png_byte bit_depth) +transform_height(png_const_structp pp, png_byte colour_type, png_byte bit_depth) { switch (bit_size(pp, colour_type, bit_depth)) { @@ -3099,11 +3817,12 @@ transform_height(png_structp pp, png_byte colour_type, png_byte bit_depth) } } +#ifdef PNG_READ_SUPPORTED /* The following can only be defined here, now we have the definitions * of the transform image sizes. */ static png_uint_32 -standard_width(png_structp pp, png_uint_32 id) +standard_width(png_const_structp pp, png_uint_32 id) { png_uint_32 width = WIDTH_FROM_ID(id); UNUSED(pp) @@ -3115,7 +3834,7 @@ standard_width(png_structp pp, png_uint_32 id) } static png_uint_32 -standard_height(png_structp pp, png_uint_32 id) +standard_height(png_const_structp pp, png_uint_32 id) { png_uint_32 height = HEIGHT_FROM_ID(id); @@ -3126,7 +3845,7 @@ standard_height(png_structp pp, png_uint_32 id) } static png_uint_32 -standard_rowsize(png_structp pp, png_uint_32 id) +standard_rowsize(png_const_structp pp, png_uint_32 id) { png_uint_32 width = standard_width(pp, id); @@ -3134,9 +3853,10 @@ standard_rowsize(png_structp pp, png_uint_32 id) width *= bit_size(pp, COL_FROM_ID(id), DEPTH_FROM_ID(id)); return (width + 7) / 8; } +#endif /* PNG_READ_SUPPORTED */ static void -transform_row(png_structp pp, png_byte buffer[TRANSFORM_ROWMAX], +transform_row(png_const_structp pp, png_byte buffer[TRANSFORM_ROWMAX], png_byte colour_type, png_byte bit_depth, png_uint_32 y) { png_uint_32 v = y << 7; @@ -3145,20 +3865,20 @@ transform_row(png_structp pp, png_byte buffer[TRANSFORM_ROWMAX], switch (bit_size(pp, colour_type, bit_depth)) { case 1: - while (i<128/8) buffer[i] = v & 0xff, v += 17, ++i; + while (i<128/8) buffer[i] = (png_byte)(v & 0xff), v += 17, ++i; return; case 2: - while (i<128/4) buffer[i] = v & 0xff, v += 33, ++i; + while (i<128/4) buffer[i] = (png_byte)(v & 0xff), v += 33, ++i; return; case 4: - while (i<128/2) buffer[i] = v & 0xff, v += 65, ++i; + while (i<128/2) buffer[i] = (png_byte)(v & 0xff), v += 65, ++i; return; case 8: /* 256 bytes total, 128 bytes in each row set as follows: */ - while (i<128) buffer[i] = v & 0xff, ++v, ++i; + while (i<128) buffer[i] = (png_byte)(v & 0xff), ++v, ++i; return; case 16: @@ -3166,7 +3886,12 @@ transform_row(png_structp pp, png_byte buffer[TRANSFORM_ROWMAX], * GA case as well as the 16 bit G case. */ while (i<128) - buffer[2*i] = (v>>8) & 0xff, buffer[2*i+1] = v & 0xff, ++v, ++i; + { + buffer[2*i] = (png_byte)((v>>8) & 0xff); + buffer[2*i+1] = (png_byte)(v & 0xff); + ++v; + ++i; + } return; @@ -3175,9 +3900,9 @@ transform_row(png_structp pp, png_byte buffer[TRANSFORM_ROWMAX], while (i<128) { /* Three bytes per pixel, r, g, b, make b by r^g */ - buffer[3*i+0] = (v >> 8) & 0xff; - buffer[3*i+1] = v & 0xff; - buffer[3*i+2] = ((v >> 8) ^ v) & 0xff; + buffer[3*i+0] = (png_byte)((v >> 8) & 0xff); + buffer[3*i+1] = (png_byte)(v & 0xff); + buffer[3*i+2] = (png_byte)(((v >> 8) ^ v) & 0xff); ++v; ++i; } @@ -3188,10 +3913,10 @@ transform_row(png_structp pp, png_byte buffer[TRANSFORM_ROWMAX], /* 65535 pixels, r, g, b, a; just replicate */ while (i<128) { - buffer[4*i+0] = (v >> 8) & 0xff; - buffer[4*i+1] = v & 0xff; - buffer[4*i+2] = (v >> 8) & 0xff; - buffer[4*i+3] = v & 0xff; + buffer[4*i+0] = (png_byte)((v >> 8) & 0xff); + buffer[4*i+1] = (png_byte)(v & 0xff); + buffer[4*i+2] = (png_byte)((v >> 8) & 0xff); + buffer[4*i+3] = (png_byte)(v & 0xff); ++v; ++i; } @@ -3205,14 +3930,14 @@ transform_row(png_structp pp, png_byte buffer[TRANSFORM_ROWMAX], while (i<128) { png_uint_32 t = v++; - buffer[6*i+0] = (t >> 8) & 0xff; - buffer[6*i+1] = t & 0xff; + buffer[6*i+0] = (png_byte)((t >> 8) & 0xff); + buffer[6*i+1] = (png_byte)(t & 0xff); t *= 257; - buffer[6*i+2] = (t >> 8) & 0xff; - buffer[6*i+3] = t & 0xff; + buffer[6*i+2] = (png_byte)((t >> 8) & 0xff); + buffer[6*i+3] = (png_byte)(t & 0xff); t *= 17; - buffer[6*i+4] = (t >> 8) & 0xff; - buffer[6*i+5] = t & 0xff; + buffer[6*i+4] = (png_byte)((t >> 8) & 0xff); + buffer[6*i+5] = (png_byte)(t & 0xff); ++i; } @@ -3223,15 +3948,15 @@ transform_row(png_structp pp, png_byte buffer[TRANSFORM_ROWMAX], while (i<128) { png_uint_32 t = v++; - buffer[8*i+0] = (t >> 8) & 0xff; - buffer[8*i+1] = t & 0xff; - buffer[8*i+4] = (t >> 8) & 0xff; - buffer[8*i+5] = t & 0xff; + buffer[8*i+0] = (png_byte)((t >> 8) & 0xff); + buffer[8*i+1] = (png_byte)(t & 0xff); + buffer[8*i+4] = (png_byte)((t >> 8) & 0xff); + buffer[8*i+5] = (png_byte)(t & 0xff); t *= 257; - buffer[8*i+2] = (t >> 8) & 0xff; - buffer[8*i+3] = t & 0xff; - buffer[8*i+6] = (t >> 8) & 0xff; - buffer[8*i+7] = t & 0xff; + buffer[8*i+2] = (png_byte)((t >> 8) & 0xff); + buffer[8*i+3] = (png_byte)(t & 0xff); + buffer[8*i+6] = (png_byte)((t >> 8) & 0xff); + buffer[8*i+7] = (png_byte)(t & 0xff); ++i; } return; @@ -3248,24 +3973,148 @@ transform_row(png_structp pp, png_byte buffer[TRANSFORM_ROWMAX], */ #define DEPTH(bd) ((png_byte)(1U << (bd))) -/* Make a standardized image given a an image colour type, bit depth and +/* This is just a helper for compiling on minimal systems with no write + * interlacing support. If there is no write interlacing we can't generate test + * cases with interlace: + */ +#ifdef PNG_WRITE_INTERLACING_SUPPORTED +# define INTERLACE_LAST PNG_INTERLACE_LAST +# define check_interlace_type(type) ((void)(type)) +# define set_write_interlace_handling(pp,type) png_set_interlace_handling(pp) +# define do_own_interlace 0 +#elif PNG_LIBPNG_VER < 10700 +# define set_write_interlace_handling(pp,type) (1) +static void +check_interlace_type(int const interlace_type) +{ + /* Prior to 1.7.0 libpng does not support the write of an interlaced image + * unless PNG_WRITE_INTERLACING_SUPPORTED, even with do_interlace so the + * code here does the pixel interlace itself, so: + */ + if (interlace_type != PNG_INTERLACE_NONE) + { + /* This is an internal error - --interlace tests should be skipped, not + * attempted. + */ + fprintf(stderr, "pngvalid: no interlace support\n"); + exit(99); + } +} +# define INTERLACE_LAST (PNG_INTERLACE_NONE+1) +# define do_own_interlace 0 +#else /* libpng 1.7+ */ +# define set_write_interlace_handling(pp,type)\ + npasses_from_interlace_type(pp,type) +# define check_interlace_type(type) ((void)(type)) +# define INTERLACE_LAST PNG_INTERLACE_LAST +# define do_own_interlace 1 +#endif /* WRITE_INTERLACING tests */ + +#if PNG_LIBPNG_VER >= 10700 || defined PNG_WRITE_INTERLACING_SUPPORTED +# define CAN_WRITE_INTERLACE 1 +#else +# define CAN_WRITE_INTERLACE 0 +#endif + +/* Do the same thing for read interlacing; this controls whether read tests do + * their own de-interlace or use libpng. + */ +#ifdef PNG_READ_INTERLACING_SUPPORTED +# define do_read_interlace 0 +#else /* no libpng read interlace support */ +# define do_read_interlace 1 +#endif +/* The following two routines use the PNG interlace support macros from + * png.h to interlace or deinterlace rows. + */ +static void +interlace_row(png_bytep buffer, png_const_bytep imageRow, + unsigned int pixel_size, png_uint_32 w, int pass, int littleendian) +{ + png_uint_32 xin, xout, xstep; + + /* Note that this can, trivially, be optimized to a memcpy on pass 7, the + * code is presented this way to make it easier to understand. In practice + * consult the code in the libpng source to see other ways of doing this. + * + * It is OK for buffer and imageRow to be identical, because 'xin' moves + * faster than 'xout' and we copy up. + */ + xin = PNG_PASS_START_COL(pass); + xstep = 1U<wname); @@ -3307,11 +4161,16 @@ make_transform_image(png_store* PNG_CONST ps, png_byte PNG_CONST colour_type, if (colour_type == 3) /* palette */ init_standard_palette(ps, pp, pi, 1U << bit_depth, 1/*do tRNS*/); +# ifdef PNG_WRITE_tRNS_SUPPORTED + else if (palette_number) + set_random_tRNS(pp, pi, colour_type, bit_depth); +# endif + png_write_info(pp, pi); if (png_get_rowbytes(pp, pi) != transform_rowsize(pp, colour_type, bit_depth)) - png_error(pp, "row size incorrect"); + png_error(pp, "transform row size incorrect"); else { @@ -3319,7 +4178,7 @@ make_transform_image(png_store* PNG_CONST ps, png_byte PNG_CONST colour_type, * because if it is called before, the information in *pp has not been * updated to reflect the interlaced image. */ - int npasses = png_set_interlace_handling(pp); + int npasses = set_write_interlace_handling(pp, interlace_type); int pass; if (npasses != npasses_from_interlace_type(pp, interlace_type)) @@ -3329,11 +4188,38 @@ make_transform_image(png_store* PNG_CONST ps, png_byte PNG_CONST colour_type, { png_uint_32 y; + /* do_own_interlace is a pre-defined boolean (a #define) which is + * set if we have to work out the interlaced rows here. + */ for (y=0; y 0) + interlace_row(buffer, buffer, + bit_size(pp, colour_type, bit_depth), w, pass, + 0/*data always bigendian*/); + else + continue; + } +# endif /* do_own_interlace */ + + choose_random_filter(pp, pass == 0 && y == 0); png_write_row(pp, buffer); } } @@ -3348,7 +4234,7 @@ make_transform_image(png_store* PNG_CONST ps, png_byte PNG_CONST colour_type, /* Use a compressed text string to test the correct interaction of text * compression and IDAT compression. */ - text.compression = PNG_TEXT_COMPRESSION_zTXt; + text.compression = TEXT_COMPRESSION; text.key = key; text.text = comment; text.text_length = (sizeof comment)-1; @@ -3380,79 +4266,36 @@ make_transform_image(png_store* PNG_CONST ps, png_byte PNG_CONST colour_type, } static void -make_transform_images(png_store *ps) +make_transform_images(png_modifier *pm) { png_byte colour_type = 0; png_byte bit_depth = 0; - int palette_number = 0; + unsigned int palette_number = 0; /* This is in case of errors. */ - safecat(ps->test, sizeof ps->test, 0, "make standard images"); + safecat(pm->this.test, sizeof pm->this.test, 0, "make standard images"); /* Use next_format to enumerate all the combinations we test, including - * generating multiple low bit depth palette images. + * generating multiple low bit depth palette images. Non-A images (palette + * and direct) are created with and without tRNS chunks. */ - while (next_format(&colour_type, &bit_depth, &palette_number)) + while (next_format(&colour_type, &bit_depth, &palette_number, 1, 1)) { int interlace_type; for (interlace_type = PNG_INTERLACE_NONE; - interlace_type < PNG_INTERLACE_LAST; ++interlace_type) + interlace_type < INTERLACE_LAST; ++interlace_type) { char name[FILE_NAME_SIZE]; standard_name(name, sizeof name, 0, colour_type, bit_depth, - palette_number, interlace_type, 0, 0, 0); - make_transform_image(ps, colour_type, bit_depth, palette_number, + palette_number, interlace_type, 0, 0, do_own_interlace); + make_transform_image(&pm->this, colour_type, bit_depth, palette_number, interlace_type, name); } } } -/* The following two routines use the PNG interlace support macros from - * png.h to interlace or deinterlace rows. - */ -static void -interlace_row(png_bytep buffer, png_const_bytep imageRow, - unsigned int pixel_size, png_uint_32 w, int pass) -{ - png_uint_32 xin, xout, xstep; - - /* Note that this can, trivially, be optimized to a memcpy on pass 7, the - * code is presented this way to make it easier to understand. In practice - * consult the code in the libpng source to see other ways of doing this. - */ - xin = PNG_PASS_START_COL(pass); - xstep = 1U<wname); + text.text = copy; + text.text_length = pos; + text.itxt_length = 0; + text.lang = 0; + text.lang_key = 0; + + png_set_text(pp, pi, &text, 1); + } +#endif + if (colour_type == 3) /* palette */ init_standard_palette(ps, pp, pi, 1U << bit_depth, 0/*do tRNS*/); @@ -3520,7 +4389,7 @@ make_size_image(png_store* PNG_CONST ps, png_byte PNG_CONST colour_type, */ pixel_size = bit_size(pp, colour_type, bit_depth); if (png_get_rowbytes(pp, pi) != ((w * pixel_size) + 7) / 8) - png_error(pp, "row size incorrect"); + png_error(pp, "size row size incorrect"); else { @@ -3534,7 +4403,8 @@ make_size_image(png_store* PNG_CONST ps, png_byte PNG_CONST colour_type, */ memset(image, 0xff, sizeof image); - if (!do_interlace && npasses != png_set_interlace_handling(pp)) + if (!do_interlace && + npasses != set_write_interlace_handling(pp, interlace_type)) png_error(pp, "write: png_set_interlace_handling failed"); /* Prepare the whole image first to avoid making it 7 times: */ @@ -3544,7 +4414,7 @@ make_size_image(png_store* PNG_CONST ps, png_byte PNG_CONST colour_type, for (pass=0; passexpect_error = !error_test[test].warning; ps->expect_warning = error_test[test].warning; @@ -3759,45 +4692,77 @@ make_error(png_store* volatile psIn, png_byte PNG_CONST colour_type, } Catch (fault) - ps = fault; /* expected exit, make sure ps is not clobbered */ + { /* expected exit */ + } #undef exception__prev #undef exception__env /* And clear these flags */ - ps->expect_error = 0; ps->expect_warning = 0; - /* Now write the whole image, just to make sure that the detected, or - * undetected, errro has not created problems inside libpng. - */ - if (png_get_rowbytes(pp, pi) != - transform_rowsize(pp, colour_type, bit_depth)) - png_error(pp, "row size incorrect"); + if (ps->expect_error) + ps->expect_error = 0; else { - png_uint_32 h = transform_height(pp, colour_type, bit_depth); - int npasses = png_set_interlace_handling(pp); - int pass; + /* Now write the whole image, just to make sure that the detected, or + * undetected, error has not created problems inside libpng. This + * doesn't work if there was a png_error in png_write_info because that + * can abort before PLTE was written. + */ + if (png_get_rowbytes(pp, pi) != + transform_rowsize(pp, colour_type, bit_depth)) + png_error(pp, "row size incorrect"); - if (npasses != npasses_from_interlace_type(pp, interlace_type)) - png_error(pp, "write: png_set_interlace_handling failed"); - - for (pass=0; pass 0) + interlace_row(buffer, buffer, + bit_size(pp, colour_type, bit_depth), w, pass, + 0/*data always bigendian*/); + else + continue; + } +# endif /* do_own_interlace */ + + png_write_row(pp, buffer); + } } - } - } + } /* image writing */ - png_write_end(pp, pi); + png_write_end(pp, pi); + } /* The following deletes the file that was just written. */ store_write_reset(ps); @@ -3810,23 +4775,23 @@ make_error(png_store* volatile psIn, png_byte PNG_CONST colour_type, } static int -make_errors(png_modifier* PNG_CONST pm, png_byte PNG_CONST colour_type, - int bdlo, int PNG_CONST bdhi) +make_errors(png_modifier* const pm, png_byte const colour_type, + int bdlo, int const bdhi) { for (; bdlo <= bdhi; ++bdlo) { int interlace_type; for (interlace_type = PNG_INTERLACE_NONE; - interlace_type < PNG_INTERLACE_LAST; ++interlace_type) + interlace_type < INTERLACE_LAST; ++interlace_type) { unsigned int test; char name[FILE_NAME_SIZE]; standard_name(name, sizeof name, 0, colour_type, 1<this, colour_type, DEPTH(bdlo), interlace_type, test, name); @@ -3839,7 +4804,7 @@ make_errors(png_modifier* PNG_CONST pm, png_byte PNG_CONST colour_type, return 1; /* keep going */ } -#endif +#endif /* PNG_WARNINGS_SUPPORTED */ static void perform_error_test(png_modifier *pm) @@ -3871,7 +4836,7 @@ perform_error_test(png_modifier *pm) * then the warning messages the library outputs will probably be garbage. */ static void -perform_formatting_test(png_store *volatile ps) +perform_formatting_test(png_store *ps) { #ifdef PNG_TIME_RFC1123_SUPPORTED /* The handle into the formatting code is the RFC1123 support; this test does @@ -3883,6 +4848,9 @@ perform_formatting_test(png_store *volatile ps) { png_const_charp correct = "29 Aug 2079 13:53:60 +0000"; png_const_charp result; +# if PNG_LIBPNG_VER >= 10600 + char timestring[29]; +# endif png_structp pp; png_time pt; @@ -3900,7 +4868,15 @@ perform_formatting_test(png_store *volatile ps) pt.minute = 53; pt.second = 60; /* a leap second */ - result = png_convert_to_rfc1123(pp, &pt); +# if PNG_LIBPNG_VER < 10600 + result = png_convert_to_rfc1123(pp, &pt); +# else + if (png_convert_to_rfc1123_buffer(timestring, &pt)) + result = timestring; + + else + result = NULL; +# endif if (result == NULL) png_error(pp, "png_convert_to_rfc1123 failed"); @@ -3931,6 +4907,7 @@ perform_formatting_test(png_store *volatile ps) #endif } +#ifdef PNG_READ_SUPPORTED /* Because we want to use the same code in both the progressive reader and the * sequential reader it is necessary to deal with the fact that the progressive * reader callbacks only have one parameter (png_get_progressive_ptr()), so this @@ -3964,7 +4941,8 @@ typedef struct standard_display png_byte green_sBIT; png_byte blue_sBIT; png_byte alpha_sBIT; - int interlace_type; + png_byte interlace_type; + png_byte filler; /* Output has a filler */ png_uint_32 id; /* Calculated file ID */ png_uint_32 w; /* Width of image */ png_uint_32 h; /* Height of image */ @@ -3973,7 +4951,9 @@ typedef struct standard_display png_uint_32 bit_width; /* Width of output row in bits */ size_t cbRow; /* Bytes in a row of the output image */ int do_interlace; /* Do interlacing internally */ + int littleendian; /* App (row) data is little endian */ int is_transparent; /* Transparency information was present. */ + int has_tRNS; /* color type GRAY or RGB with a tRNS chunk. */ int speed; /* Doing a speed test */ int use_update_info;/* Call update_info, not start_image */ struct @@ -4004,6 +4984,7 @@ standard_display_init(standard_display *dp, png_store* ps, png_uint_32 id, dp->red_sBIT = dp->blue_sBIT = dp->green_sBIT = dp->alpha_sBIT = dp->bit_depth; dp->interlace_type = INTERLACE_FROM_ID(id); + check_interlace_type(dp->interlace_type); dp->id = id; /* All the rest are filled in after the read_info: */ dp->w = 0; @@ -4013,13 +4994,14 @@ standard_display_init(standard_display *dp, png_store* ps, png_uint_32 id, dp->bit_width = 0; dp->cbRow = 0; dp->do_interlace = do_interlace; + dp->littleendian = 0; dp->is_transparent = 0; dp->speed = ps->speed; dp->use_update_info = use_update_info; dp->npalette = 0; /* Preset the transparent color to black: */ memset(&dp->transparent, 0, sizeof dp->transparent); - /* Preset the palette to full intensity/opaque througout: */ + /* Preset the palette to full intensity/opaque throughout: */ memset(dp->palette, 0xff, sizeof dp->palette); } @@ -4059,7 +5041,8 @@ standard_palette_init(standard_display *dp) * palette (it does not check for a transparent colour in the non-palette case.) */ static int -read_palette(store_palette palette, int *npalette, png_structp pp, png_infop pi) +read_palette(store_palette palette, int *npalette, png_const_structp pp, + png_infop pi) { png_colorp pal; png_bytep trans_alpha; @@ -4150,7 +5133,8 @@ read_palette(store_palette palette, int *npalette, png_structp pp, png_infop pi) * non-transform case). */ static void -standard_palette_validate(standard_display *dp, png_structp pp, png_infop pi) +standard_palette_validate(standard_display *dp, png_const_structp pp, + png_infop pi) { int npalette; store_palette palette; @@ -4286,7 +5270,7 @@ standard_info_part1(standard_display *dp, png_structp pp, png_infop pi) */ standard_palette_validate(dp, pp, pi); - /* In any case always check for a tranparent color (notice that the + /* In any case always check for a transparent color (notice that the * colour type 3 case must not give a successful return on the get_tRNS call * with these arguments!) */ @@ -4303,14 +5287,14 @@ standard_info_part1(standard_display *dp, png_structp pp, png_infop pi) case 0: dp->transparent.red = dp->transparent.green = dp->transparent.blue = trans_color->gray; - dp->is_transparent = 1; + dp->has_tRNS = 1; break; case 2: dp->transparent.red = trans_color->red; dp->transparent.green = trans_color->green; dp->transparent.blue = trans_color->blue; - dp->is_transparent = 1; + dp->has_tRNS = 1; break; case 3: @@ -4331,8 +5315,19 @@ standard_info_part1(standard_display *dp, png_structp pp, png_infop pi) * turning on interlace handling (if do_interlace is not set.) */ dp->npasses = npasses_from_interlace_type(pp, dp->interlace_type); - if (!dp->do_interlace && dp->npasses != png_set_interlace_handling(pp)) - png_error(pp, "validate: file changed interlace type"); + if (!dp->do_interlace) + { +# ifdef PNG_READ_INTERLACING_SUPPORTED + if (dp->npasses != png_set_interlace_handling(pp)) + png_error(pp, "validate: file changed interlace type"); +# else /* !READ_INTERLACING */ + /* This should never happen: the relevant tests (!do_interlace) should + * not be run. + */ + if (dp->npasses > 1) + png_error(pp, "validate: no libpng interlace support"); +# endif /* !READ_INTERLACING */ + } /* Caller calls png_read_update_info or png_start_read_image now, then calls * part2. @@ -4344,12 +5339,20 @@ standard_info_part1(standard_display *dp, png_structp pp, png_infop pi) * image. */ static void -standard_info_part2(standard_display *dp, png_structp pp, png_infop pi, - int nImages) +standard_info_part2(standard_display *dp, png_const_structp pp, + png_const_infop pi, int nImages) { /* Record cbRow now that it can be found. */ - dp->pixel_size = bit_size(pp, png_get_color_type(pp, pi), - png_get_bit_depth(pp, pi)); + { + png_byte ct = png_get_color_type(pp, pi); + png_byte bd = png_get_bit_depth(pp, pi); + + if (bd >= 8 && (ct == PNG_COLOR_TYPE_RGB || ct == PNG_COLOR_TYPE_GRAY) && + dp->filler) + ct |= 4; /* handle filler as faked alpha channel */ + + dp->pixel_size = bit_size(pp, ct, bd); + } dp->bit_width = png_get_image_width(pp, pi) * dp->pixel_size; dp->cbRow = png_get_rowbytes(pp, pi); @@ -4390,7 +5393,7 @@ standard_info_imp(standard_display *dp, png_structp pp, png_infop pi, standard_info_part2(dp, pp, pi, nImages); } -static void +static void PNGCBAPI standard_info(png_structp pp, png_infop pi) { standard_display *dp = voidcast(standard_display*, @@ -4402,10 +5405,11 @@ standard_info(png_structp pp, png_infop pi) standard_info_imp(dp, pp, pi, 1 /*only one image*/); } -static void -progressive_row(png_structp pp, png_bytep new_row, png_uint_32 y, int pass) +static void PNGCBAPI +progressive_row(png_structp ppIn, png_bytep new_row, png_uint_32 y, int pass) { - PNG_CONST standard_display *dp = voidcast(standard_display*, + png_const_structp pp = ppIn; + const standard_display *dp = voidcast(standard_display*, png_get_progressive_ptr(pp)); /* When handling interlacing some rows will be absent in each pass, the @@ -4429,7 +5433,7 @@ progressive_row(png_structp pp, png_bytep new_row, png_uint_32 y, int pass) if (pass != png_get_current_pass_number(pp)) png_error(pp, "png_get_current_pass_number is broken"); -#endif +#endif /* USER_TRANSFORM_INFO */ y = PNG_ROW_FROM_PASS_ROW(y, pass); } @@ -4440,34 +5444,39 @@ progressive_row(png_structp pp, png_bytep new_row, png_uint_32 y, int pass) row = store_image_row(dp->ps, pp, 0, y); -#ifdef PNG_READ_INTERLACING_SUPPORTED /* Combine the new row into the old: */ +#ifdef PNG_READ_INTERLACING_SUPPORTED if (dp->do_interlace) +#endif /* READ_INTERLACING */ { if (dp->interlace_type == PNG_INTERLACE_ADAM7) - deinterlace_row(row, new_row, dp->pixel_size, dp->w, pass); + deinterlace_row(row, new_row, dp->pixel_size, dp->w, pass, + dp->littleendian); else - row_copy(row, new_row, dp->pixel_size * dp->w); + row_copy(row, new_row, dp->pixel_size * dp->w, dp->littleendian); } +#ifdef PNG_READ_INTERLACING_SUPPORTED else png_progressive_combine_row(pp, row, new_row); - } else if (dp->interlace_type == PNG_INTERLACE_ADAM7 && - PNG_ROW_IN_INTERLACE_PASS(y, pass) && - PNG_PASS_COLS(dp->w, pass) > 0) - png_error(pp, "missing row in progressive de-interlacing"); #endif /* PNG_READ_INTERLACING_SUPPORTED */ + } + + else if (dp->interlace_type == PNG_INTERLACE_ADAM7 && + PNG_ROW_IN_INTERLACE_PASS(y, pass) && + PNG_PASS_COLS(dp->w, pass) > 0) + png_error(pp, "missing row in progressive de-interlacing"); } static void sequential_row(standard_display *dp, png_structp pp, png_infop pi, - PNG_CONST int iImage, PNG_CONST int iDisplay) + int iImage, int iDisplay) { - PNG_CONST int npasses = dp->npasses; - PNG_CONST int do_interlace = dp->do_interlace && + int npasses = dp->npasses; + int do_interlace = dp->do_interlace && dp->interlace_type == PNG_INTERLACE_ADAM7; - PNG_CONST png_uint_32 height = standard_height(pp, dp->id); - PNG_CONST png_uint_32 width = standard_width(pp, dp->id); - PNG_CONST png_store* ps = dp->ps; + png_uint_32 height = standard_height(pp, dp->id); + png_uint_32 width = standard_width(pp, dp->id); + const png_store* ps = dp->ps; int pass; for (pass=0; pass= 0) deinterlace_row(store_image_row(ps, pp, iImage, y), row, - dp->pixel_size, dp->w, pass); + dp->pixel_size, dp->w, pass, dp->littleendian); if (iDisplay >= 0) deinterlace_row(store_image_row(ps, pp, iDisplay, y), display, - dp->pixel_size, dp->w, pass); + dp->pixel_size, dp->w, pass, dp->littleendian); } } else @@ -4522,8 +5531,122 @@ sequential_row(standard_display *dp, png_structp pp, png_infop pi, png_read_end(pp, pi); } +#ifdef PNG_TEXT_SUPPORTED static void -standard_row_validate(standard_display *dp, png_structp pp, +standard_check_text(png_const_structp pp, png_const_textp tp, + png_const_charp keyword, png_const_charp text) +{ + char msg[1024]; + size_t pos = safecat(msg, sizeof msg, 0, "text: "); + size_t ok; + + pos = safecat(msg, sizeof msg, pos, keyword); + pos = safecat(msg, sizeof msg, pos, ": "); + ok = pos; + + if (tp->compression != TEXT_COMPRESSION) + { + char buf[64]; + + sprintf(buf, "compression [%d->%d], ", TEXT_COMPRESSION, + tp->compression); + pos = safecat(msg, sizeof msg, pos, buf); + } + + if (tp->key == NULL || strcmp(tp->key, keyword) != 0) + { + pos = safecat(msg, sizeof msg, pos, "keyword \""); + if (tp->key != NULL) + { + pos = safecat(msg, sizeof msg, pos, tp->key); + pos = safecat(msg, sizeof msg, pos, "\", "); + } + + else + pos = safecat(msg, sizeof msg, pos, "null, "); + } + + if (tp->text == NULL) + pos = safecat(msg, sizeof msg, pos, "text lost, "); + + else + { + if (tp->text_length != strlen(text)) + { + char buf[64]; + sprintf(buf, "text length changed[%lu->%lu], ", + (unsigned long)strlen(text), (unsigned long)tp->text_length); + pos = safecat(msg, sizeof msg, pos, buf); + } + + if (strcmp(tp->text, text) != 0) + { + pos = safecat(msg, sizeof msg, pos, "text becomes \""); + pos = safecat(msg, sizeof msg, pos, tp->text); + pos = safecat(msg, sizeof msg, pos, "\" (was \""); + pos = safecat(msg, sizeof msg, pos, text); + pos = safecat(msg, sizeof msg, pos, "\"), "); + } + } + + if (tp->itxt_length != 0) + pos = safecat(msg, sizeof msg, pos, "iTXt length set, "); + + if (tp->lang != NULL) + { + pos = safecat(msg, sizeof msg, pos, "iTXt language \""); + pos = safecat(msg, sizeof msg, pos, tp->lang); + pos = safecat(msg, sizeof msg, pos, "\", "); + } + + if (tp->lang_key != NULL) + { + pos = safecat(msg, sizeof msg, pos, "iTXt keyword \""); + pos = safecat(msg, sizeof msg, pos, tp->lang_key); + pos = safecat(msg, sizeof msg, pos, "\", "); + } + + if (pos > ok) + { + msg[pos-2] = '\0'; /* Remove the ", " at the end */ + png_error(pp, msg); + } +} + +static void +standard_text_validate(standard_display *dp, png_const_structp pp, + png_infop pi, int check_end) +{ + png_textp tp = NULL; + png_uint_32 num_text = png_get_text(pp, pi, &tp, NULL); + + if (num_text == 2 && tp != NULL) + { + standard_check_text(pp, tp, "image name", dp->ps->current->name); + + /* This exists because prior to 1.5.18 the progressive reader left the + * png_struct z_stream unreset at the end of the image, so subsequent + * attempts to use it simply returns Z_STREAM_END. + */ + if (check_end) + standard_check_text(pp, tp+1, "end marker", "end"); + } + + else + { + char msg[64]; + + sprintf(msg, "expected two text items, got %lu", + (unsigned long)num_text); + png_error(pp, msg); + } +} +#else +# define standard_text_validate(dp,pp,pi,check_end) ((void)0) +#endif + +static void +standard_row_validate(standard_display *dp, png_const_structp pp, int iImage, int iDisplay, png_uint_32 y) { int where; @@ -4539,47 +5662,32 @@ standard_row_validate(standard_display *dp, png_structp pp, * In earlier passes 'row' will be partially filled in, with only the pixels * that have been read so far, but 'display' will have those pixels * replicated to fill the unread pixels while reading an interlaced image. -#if PNG_LIBPNG_VER < 10506 - * The side effect inside the libpng sequential reader is that the 'row' - * array retains the correct values for unwritten pixels within the row - * bytes, while the 'display' array gets bits off the end of the image (in - * the last byte) trashed. Unfortunately in the progressive reader the - * row bytes are always trashed, so we always do a pixel_cmp here even though - * a memcmp of all cbRow bytes will succeed for the sequential reader. -#endif */ if (iImage >= 0 && (where = pixel_cmp(std, store_image_row(dp->ps, pp, iImage, y), dp->bit_width)) != 0) { char msg[64]; - sprintf(msg, "PNG image row[%d][%d] changed from %.2x to %.2x", y, - where-1, std[where-1], + sprintf(msg, "PNG image row[%lu][%d] changed from %.2x to %.2x", + (unsigned long)y, where-1, std[where-1], store_image_row(dp->ps, pp, iImage, y)[where-1]); png_error(pp, msg); } -#if PNG_LIBPNG_VER < 10506 - /* In this case use pixel_cmp because we need to compare a partial - * byte at the end of the row if the row is not an exact multiple - * of 8 bits wide. (This is fixed in libpng-1.5.6 and pixel_cmp is - * changed to match!) - */ -#endif if (iDisplay >= 0 && (where = pixel_cmp(std, store_image_row(dp->ps, pp, iDisplay, y), dp->bit_width)) != 0) { char msg[64]; - sprintf(msg, "display row[%d][%d] changed from %.2x to %.2x", y, - where-1, std[where-1], + sprintf(msg, "display row[%lu][%d] changed from %.2x to %.2x", + (unsigned long)y, where-1, std[where-1], store_image_row(dp->ps, pp, iDisplay, y)[where-1]); png_error(pp, msg); } } static void -standard_image_validate(standard_display *dp, png_structp pp, int iImage, +standard_image_validate(standard_display *dp, png_const_structp pp, int iImage, int iDisplay) { png_uint_32 y; @@ -4597,9 +5705,10 @@ standard_image_validate(standard_display *dp, png_structp pp, int iImage, dp->ps->validated = 1; } -static void -standard_end(png_structp pp, png_infop pi) +static void PNGCBAPI +standard_end(png_structp ppIn, png_infop pi) { + png_const_structp pp = ppIn; standard_display *dp = voidcast(standard_display*, png_get_progressive_ptr(pp)); @@ -4608,12 +5717,14 @@ standard_end(png_structp pp, png_infop pi) /* Validate the image - progressive reading only produces one variant for * interlaced images. */ + standard_text_validate(dp, pp, pi, + PNG_LIBPNG_VER >= 10518/*check_end: see comments above*/); standard_image_validate(dp, pp, 0, -1); } /* A single test run checking the standard image to ensure it is not damaged. */ static void -standard_test(png_store* PNG_CONST psIn, png_uint_32 PNG_CONST id, +standard_test(png_store* const psIn, png_uint_32 const id, int do_interlace, int use_update_info) { standard_display d; @@ -4677,7 +5788,10 @@ standard_test(png_store* PNG_CONST psIn, png_uint_32 PNG_CONST id, * image is correct. */ if (!d.speed) + { + standard_text_validate(&d, pp, pi, 1/*check_end*/); standard_image_validate(&d, pp, 0, 1); + } else d.ps->validated = 1; } @@ -4698,18 +5812,18 @@ standard_test(png_store* PNG_CONST psIn, png_uint_32 PNG_CONST id, } static int -test_standard(png_modifier* PNG_CONST pm, png_byte PNG_CONST colour_type, - int bdlo, int PNG_CONST bdhi) +test_standard(png_modifier* const pm, png_byte const colour_type, + int bdlo, int const bdhi) { for (; bdlo <= bdhi; ++bdlo) { int interlace_type; for (interlace_type = PNG_INTERLACE_NONE; - interlace_type < PNG_INTERLACE_LAST; ++interlace_type) + interlace_type < INTERLACE_LAST; ++interlace_type) { standard_test(&pm->this, FILEID(colour_type, DEPTH(bdlo), 0/*palette*/, - interlace_type, 0, 0, 0), 0/*do_interlace*/, pm->use_update_info); + interlace_type, 0, 0, 0), do_read_interlace, pm->use_update_info); if (fail(pm)) return 0; @@ -4744,8 +5858,8 @@ perform_standard_test(png_modifier *pm) /********************************** SIZE TESTS ********************************/ static int -test_size(png_modifier* PNG_CONST pm, png_byte PNG_CONST colour_type, - int bdlo, int PNG_CONST bdhi) +test_size(png_modifier* const pm, png_byte const colour_type, + int bdlo, int const bdhi) { /* Run the tests on each combination. * @@ -4754,8 +5868,10 @@ test_size(png_modifier* PNG_CONST pm, png_byte PNG_CONST colour_type, * width and height. This is a waste of time in practice, hence the * hinc and winc stuff: */ - static PNG_CONST png_byte hinc[] = {1, 3, 11, 1, 5}; - static PNG_CONST png_byte winc[] = {1, 9, 5, 7, 1}; + static const png_byte hinc[] = {1, 3, 11, 1, 5}; + static const png_byte winc[] = {1, 9, 5, 7, 1}; + int save_bdlo = bdlo; + for (; bdlo <= bdhi; ++bdlo) { png_uint_32 h, w; @@ -4781,20 +5897,6 @@ test_size(png_modifier* PNG_CONST pm, png_byte PNG_CONST colour_type, if (fail(pm)) return 0; - standard_test(&pm->this, FILEID(colour_type, DEPTH(bdlo), 0/*palette*/, - PNG_INTERLACE_ADAM7, w, h, 0), 0/*do_interlace*/, - pm->use_update_info); - - if (fail(pm)) - return 0; - - standard_test(&pm->this, FILEID(colour_type, DEPTH(bdlo), 0/*palette*/, - PNG_INTERLACE_ADAM7, w, h, 1), 0/*do_interlace*/, - pm->use_update_info); - - if (fail(pm)) - return 0; - /* Now validate the interlaced read side - do_interlace true, * in the progressive case this does actually make a difference * to the code used in the non-interlaced case too. @@ -4806,12 +5908,64 @@ test_size(png_modifier* PNG_CONST pm, png_byte PNG_CONST colour_type, if (fail(pm)) return 0; +# if CAN_WRITE_INTERLACE + /* Validate the pngvalid code itself: */ + standard_test(&pm->this, FILEID(colour_type, DEPTH(bdlo), 0/*palette*/, + PNG_INTERLACE_ADAM7, w, h, 1), 1/*do_interlace*/, + pm->use_update_info); + + if (fail(pm)) + return 0; +# endif + } + } + + /* Now do the tests of libpng interlace handling, after we have made sure + * that the pngvalid version works: + */ + for (bdlo = save_bdlo; bdlo <= bdhi; ++bdlo) + { + png_uint_32 h, w; + + for (h=1; h<=16; h+=hinc[bdlo]) for (w=1; w<=16; w+=winc[bdlo]) + { +# ifdef PNG_READ_INTERLACING_SUPPORTED + /* Test with pngvalid generated interlaced images first; we have + * already verify these are ok (unless pngvalid has self-consistent + * read/write errors, which is unlikely), so this detects errors in the + * read side first: + */ +# if CAN_WRITE_INTERLACE + standard_test(&pm->this, FILEID(colour_type, DEPTH(bdlo), 0/*palette*/, + PNG_INTERLACE_ADAM7, w, h, 1), 0/*do_interlace*/, + pm->use_update_info); + + if (fail(pm)) + return 0; +# endif +# endif /* READ_INTERLACING */ + +# ifdef PNG_WRITE_INTERLACING_SUPPORTED + /* Test the libpng write side against the pngvalid read side: */ standard_test(&pm->this, FILEID(colour_type, DEPTH(bdlo), 0/*palette*/, PNG_INTERLACE_ADAM7, w, h, 0), 1/*do_interlace*/, pm->use_update_info); if (fail(pm)) return 0; +# endif + +# ifdef PNG_READ_INTERLACING_SUPPORTED +# ifdef PNG_WRITE_INTERLACING_SUPPORTED + /* Test both together: */ + standard_test(&pm->this, FILEID(colour_type, DEPTH(bdlo), 0/*palette*/, + PNG_INTERLACE_ADAM7, w, h, 0), 0/*do_interlace*/, + pm->use_update_info); + + if (fail(pm)) + return 0; +# endif +# endif /* READ_INTERLACING */ } } @@ -4860,10 +6014,17 @@ typedef struct image_pixel */ unsigned int red, green, blue, alpha; /* For non-palette images. */ unsigned int palette_index; /* For a palette image. */ - png_byte colour_type; /* As in the spec. */ - png_byte bit_depth; /* Defines bit size in row */ - png_byte sample_depth; /* Scale of samples */ - int have_tRNS; /* tRNS chunk may need processing */ + png_byte colour_type; /* As in the spec. */ + png_byte bit_depth; /* Defines bit size in row */ + png_byte sample_depth; /* Scale of samples */ + unsigned int have_tRNS :1; /* tRNS chunk may need processing */ + unsigned int swap_rgb :1; /* RGB swapped to BGR */ + unsigned int alpha_first :1; /* Alpha at start, not end */ + unsigned int alpha_inverted :1; /* Alpha channel inverted */ + unsigned int mono_inverted :1; /* Gray channel inverted */ + unsigned int swap16 :1; /* Byte swap 16-bit components */ + unsigned int littleendian :1; /* High bits on right */ + unsigned int sig_bits :1; /* Pixel shifted (sig bits only) */ /* For checking the code calculates double precision floating point values * along with an error value, accumulated from the transforms. Because an @@ -4871,6 +6032,9 @@ typedef struct image_pixel * up to just less than +/-1 in the scaled value) the *lowest* sBIT for each * channel is stored. This sBIT value is folded in to the stored error value * at the end of the application of the transforms to the pixel. + * + * If sig_bits is set above the red, green, blue and alpha values have been + * scaled so they only contain the significant bits of the component values. */ double redf, greenf, bluef, alphaf; double rede, greene, bluee, alphae; @@ -4879,26 +6043,27 @@ typedef struct image_pixel /* Shared utility function, see below. */ static void -image_pixel_setf(image_pixel *this, unsigned int max) +image_pixel_setf(image_pixel *this, unsigned int rMax, unsigned int gMax, + unsigned int bMax, unsigned int aMax) { - this->redf = this->red / (double)max; - this->greenf = this->green / (double)max; - this->bluef = this->blue / (double)max; - this->alphaf = this->alpha / (double)max; + this->redf = this->red / (double)rMax; + this->greenf = this->green / (double)gMax; + this->bluef = this->blue / (double)bMax; + this->alphaf = this->alpha / (double)aMax; - if (this->red < max) + if (this->red < rMax) this->rede = this->redf * DBL_EPSILON; else this->rede = 0; - if (this->green < max) + if (this->green < gMax) this->greene = this->greenf * DBL_EPSILON; else this->greene = 0; - if (this->blue < max) + if (this->blue < bMax) this->bluee = this->bluef * DBL_EPSILON; else this->bluee = 0; - if (this->alpha < max) + if (this->alpha < aMax) this->alphae = this->alphaf * DBL_EPSILON; else this->alphae = 0; @@ -4910,18 +6075,22 @@ image_pixel_setf(image_pixel *this, unsigned int max) */ static void image_pixel_init(image_pixel *this, png_const_bytep row, png_byte colour_type, - png_byte bit_depth, png_uint_32 x, store_palette palette) + png_byte bit_depth, png_uint_32 x, store_palette palette, + const image_pixel *format /*from pngvalid transform of input*/) { - PNG_CONST png_byte sample_depth = (png_byte)(colour_type == - PNG_COLOR_TYPE_PALETTE ? 8 : bit_depth); - PNG_CONST unsigned int max = (1U<swap16); + int littleendian = (format != 0 && format->littleendian); + int sig_bits = (format != 0 && format->sig_bits); /* Initially just set everything to the same number and the alpha to opaque. * Note that this currently assumes a simple palette where entry x has colour * rgb(x,x,x)! */ this->palette_index = this->red = this->green = this->blue = - sample(row, colour_type, bit_depth, x, 0); + sample(row, colour_type, bit_depth, x, 0, swap16, littleendian); this->alpha = max; this->red_sBIT = this->green_sBIT = this->blue_sBIT = this->alpha_sBIT = sample_depth; @@ -4932,7 +6101,7 @@ image_pixel_init(image_pixel *this, png_const_bytep row, png_byte colour_type, /* This permits the caller to default to the sample value. */ if (palette != 0) { - PNG_CONST unsigned int i = this->palette_index; + unsigned int i = this->palette_index; this->red = palette[i].red; this->green = palette[i].green; @@ -4945,21 +6114,52 @@ image_pixel_init(image_pixel *this, png_const_bytep row, png_byte colour_type, { unsigned int i = 0; + if ((colour_type & 4) != 0 && format != 0 && format->alpha_first) + { + this->alpha = this->red; + /* This handles the gray case for 'AG' pixels */ + this->palette_index = this->red = this->green = this->blue = + sample(row, colour_type, bit_depth, x, 1, swap16, littleendian); + i = 1; + } + if (colour_type & 2) { - this->green = sample(row, colour_type, bit_depth, x, 1); - this->blue = sample(row, colour_type, bit_depth, x, 2); - i = 2; + /* Green is second for both BGR and RGB: */ + this->green = sample(row, colour_type, bit_depth, x, ++i, swap16, + littleendian); + + if (format != 0 && format->swap_rgb) /* BGR */ + this->red = sample(row, colour_type, bit_depth, x, ++i, swap16, + littleendian); + else + this->blue = sample(row, colour_type, bit_depth, x, ++i, swap16, + littleendian); + } + + else /* grayscale */ if (format != 0 && format->mono_inverted) + this->red = this->green = this->blue = this->red ^ max; + + if ((colour_type & 4) != 0) /* alpha */ + { + if (format == 0 || !format->alpha_first) + this->alpha = sample(row, colour_type, bit_depth, x, ++i, swap16, + littleendian); + + if (format != 0 && format->alpha_inverted) + this->alpha ^= max; } - if (colour_type & 4) - this->alpha = sample(row, colour_type, bit_depth, x, ++i); } /* Calculate the scaled values, these are simply the values divided by * 'max' and the error is initialized to the double precision epsilon value * from the header file. */ - image_pixel_setf(this, max); + image_pixel_setf(this, + sig_bits ? (1U << format->red_sBIT)-1 : max, + sig_bits ? (1U << format->green_sBIT)-1 : max, + sig_bits ? (1U << format->blue_sBIT)-1 : max, + sig_bits ? (1U << format->alpha_sBIT)-1 : max); /* Store the input information for use in the transforms - these will * modify the information. @@ -4968,8 +6168,18 @@ image_pixel_init(image_pixel *this, png_const_bytep row, png_byte colour_type, this->bit_depth = bit_depth; this->sample_depth = sample_depth; this->have_tRNS = 0; + this->swap_rgb = 0; + this->alpha_first = 0; + this->alpha_inverted = 0; + this->mono_inverted = 0; + this->swap16 = 0; + this->littleendian = 0; + this->sig_bits = 0; } +#if defined PNG_READ_EXPAND_SUPPORTED || defined PNG_READ_GRAY_TO_RGB_SUPPORTED\ + || defined PNG_READ_EXPAND_SUPPORTED || defined PNG_READ_EXPAND_16_SUPPORTED\ + || defined PNG_READ_BACKGROUND_SUPPORTED /* Convert a palette image to an rgb image. This necessarily converts the tRNS * chunk at the same time, because the tRNS will be in palette form. The way * palette validation works means that the original palette is never updated, @@ -4999,10 +6209,14 @@ image_pixel_convert_PLTE(image_pixel *this) /* Add an alpha channel; this will import the tRNS information because tRNS is * not valid in an alpha image. The bit depth will invariably be set to at - * least 8. Palette images will be converted to alpha (using the above API). + * least 8 prior to 1.7.0. Palette images will be converted to alpha (using + * the above API). With png_set_background the alpha channel is never expanded + * but this routine is used by pngvalid to simplify code; 'for_background' + * records this. */ static void -image_pixel_add_alpha(image_pixel *this, PNG_CONST standard_display *display) +image_pixel_add_alpha(image_pixel *this, const standard_display *display, + int for_background) { if (this->colour_type == PNG_COLOR_TYPE_PALETTE) image_pixel_convert_PLTE(this); @@ -5011,11 +6225,21 @@ image_pixel_add_alpha(image_pixel *this, PNG_CONST standard_display *display) { if (this->colour_type == PNG_COLOR_TYPE_GRAY) { - if (this->bit_depth < 8) - this->bit_depth = 8; +# if PNG_LIBPNG_VER < 10700 + if (!for_background && this->bit_depth < 8) + this->bit_depth = this->sample_depth = 8; +# endif if (this->have_tRNS) { + /* After 1.7 the expansion of bit depth only happens if there is a + * tRNS chunk to expand at this point. + */ +# if PNG_LIBPNG_VER >= 10700 + if (!for_background && this->bit_depth < 8) + this->bit_depth = this->sample_depth = 8; +# endif + this->have_tRNS = 0; /* Check the input, original, channel value here against the @@ -5047,9 +6271,11 @@ image_pixel_add_alpha(image_pixel *this, PNG_CONST standard_display *display) this->alphaf = 0; else this->alphaf = 1; - - this->colour_type = PNG_COLOR_TYPE_RGB_ALPHA; } + else + this->alphaf = 1; + + this->colour_type = PNG_COLOR_TYPE_RGB_ALPHA; } /* The error in the alpha is zero and the sBIT value comes from the @@ -5059,18 +6285,19 @@ image_pixel_add_alpha(image_pixel *this, PNG_CONST standard_display *display) this->alpha_sBIT = display->alpha_sBIT; } } +#endif /* transforms that need image_pixel_add_alpha */ struct transform_display; typedef struct image_transform { /* The name of this transform: a string. */ - PNG_CONST char *name; + const char *name; /* Each transform can be disabled from the command line: */ int enable; /* The global list of transforms; read only. */ - struct image_transform *PNG_CONST list; + struct image_transform *const list; /* The global count of the number of times this transform has been set on an * image. @@ -5083,7 +6310,7 @@ typedef struct image_transform /* The next transform in the list, each transform must call its own next * transform after it has processed the pixel successfully. */ - PNG_CONST struct image_transform *next; + const struct image_transform *next; /* A single transform for the image, expressed as a series of function * callbacks and some space for values. @@ -5091,12 +6318,12 @@ typedef struct image_transform * First a callback to add any required modifications to the png_modifier; * this gets called just before the modifier is set up for read. */ - void (*ini)(PNG_CONST struct image_transform *this, + void (*ini)(const struct image_transform *this, struct transform_display *that); /* And a callback to set the transform on the current png_read_struct: */ - void (*set)(PNG_CONST struct image_transform *this, + void (*set)(const struct image_transform *this, struct transform_display *that, png_structp pp, png_infop pi); /* Then a transform that takes an input pixel in one PNG format or another @@ -5105,8 +6332,8 @@ typedef struct image_transform * in the libpng implementation!) The png_structp is solely to allow error * reporting via png_error and png_warning. */ - void (*mod)(PNG_CONST struct image_transform *this, image_pixel *that, - png_structp pp, PNG_CONST struct transform_display *display); + void (*mod)(const struct image_transform *this, image_pixel *that, + png_const_structp pp, const struct transform_display *display); /* Add this transform to the list and return true if the transform is * meaningful for this colour type and bit depth - if false then the @@ -5114,7 +6341,7 @@ typedef struct image_transform * point running it. */ int (*add)(struct image_transform *this, - PNG_CONST struct image_transform **that, png_byte colour_type, + const struct image_transform **that, png_byte colour_type, png_byte bit_depth); } image_transform; @@ -5124,11 +6351,13 @@ typedef struct transform_display /* Parameters */ png_modifier* pm; - PNG_CONST image_transform* transform_list; + const image_transform* transform_list; + unsigned int max_gamma_8; /* Local variables */ png_byte output_colour_type; png_byte output_bit_depth; + png_byte unpacked; /* Modifications (not necessarily used.) */ gama_modification gama_mod; @@ -5165,7 +6394,7 @@ transform_set_encoding(transform_display *this) /* Three functions to end the list: */ static void -image_transform_ini_end(PNG_CONST image_transform *this, +image_transform_ini_end(const image_transform *this, transform_display *that) { UNUSED(this) @@ -5173,7 +6402,7 @@ image_transform_ini_end(PNG_CONST image_transform *this, } static void -image_transform_set_end(PNG_CONST image_transform *this, +image_transform_set_end(const image_transform *this, transform_display *that, png_structp pp, png_infop pi) { UNUSED(this) @@ -5200,10 +6429,11 @@ sample_scale(double sample_value, unsigned int scale) } static void -image_transform_mod_end(PNG_CONST image_transform *this, image_pixel *that, - png_structp pp, PNG_CONST transform_display *display) +image_transform_mod_end(const image_transform *this, image_pixel *that, + png_const_structp pp, const transform_display *display) { - PNG_CONST unsigned int scale = (1U<sample_depth)-1; + unsigned int scale = (1U<sample_depth)-1; + int sig_bits = that->sig_bits; UNUSED(this) UNUSED(pp) @@ -5218,6 +6448,13 @@ image_transform_mod_end(PNG_CONST image_transform *this, image_pixel *that, */ that->red = sample_scale(that->redf, scale); + /* This is a bit bogus; really the above calculation should use the red_sBIT + * value, not sample_depth, but because libpng does png_set_shift by just + * shifting the bits we get errors if we don't do it the same way. + */ + if (sig_bits && that->red_sBIT < that->sample_depth) + that->red >>= that->sample_depth - that->red_sBIT; + /* The error value is increased, at the end, according to the lowest sBIT * value seen. Common sense tells us that the intermediate integer * representations are no more accurate than +/- 0.5 in the integral values, @@ -5233,7 +6470,13 @@ image_transform_mod_end(PNG_CONST image_transform *this, image_pixel *that, if (that->colour_type & PNG_COLOR_MASK_COLOR) { that->green = sample_scale(that->greenf, scale); + if (sig_bits && that->green_sBIT < that->sample_depth) + that->green >>= that->sample_depth - that->green_sBIT; + that->blue = sample_scale(that->bluef, scale); + if (sig_bits && that->blue_sBIT < that->sample_depth) + that->blue >>= that->sample_depth - that->blue_sBIT; + that->greene += 1./(2*((1U<green_sBIT)-1)); that->bluee += 1./(2*((1U<blue_sBIT)-1)); } @@ -5253,9 +6496,12 @@ image_transform_mod_end(PNG_CONST image_transform *this, image_pixel *that, else { that->alpha = scale; /* opaque */ - that->alpha = 1; /* Override this. */ + that->alphaf = 1; /* Override this. */ that->alphae = 0; /* It's exact ;-) */ } + + if (sig_bits && that->alpha_sBIT < that->sample_depth) + that->alpha >>= that->sample_depth - that->alpha_sBIT; } /* Static 'end' structure: */ @@ -5278,21 +6524,23 @@ static image_transform image_transform_end = */ static void transform_display_init(transform_display *dp, png_modifier *pm, png_uint_32 id, - PNG_CONST image_transform *transform_list) + const image_transform *transform_list) { memset(dp, 0, sizeof *dp); /* Standard fields */ - standard_display_init(&dp->this, &pm->this, id, 0/*do_interlace*/, + standard_display_init(&dp->this, &pm->this, id, do_read_interlace, pm->use_update_info); /* Parameter fields */ dp->pm = pm; dp->transform_list = transform_list; + dp->max_gamma_8 = 16; /* Local variable fields */ dp->output_colour_type = 255; /* invalid */ dp->output_bit_depth = 255; /* invalid */ + dp->unpacked = 0; /* not unpacked */ } static void @@ -5320,6 +6568,14 @@ transform_info_imp(transform_display *dp, png_structp pp, png_infop pi) dp->output_colour_type = png_get_color_type(pp, pi); dp->output_bit_depth = png_get_bit_depth(pp, pi); + /* If png_set_filler is in action then fake the output color type to include + * an alpha channel where appropriate. + */ + if (dp->output_bit_depth >= 8 && + (dp->output_colour_type == PNG_COLOR_TYPE_RGB || + dp->output_colour_type == PNG_COLOR_TYPE_GRAY) && dp->this.filler) + dp->output_colour_type |= 4; + /* Validate the combination of colour type and bit depth that we are getting * out of libpng; the semantics of something not in the PNG spec are, at * best, unclear. @@ -5328,16 +6584,16 @@ transform_info_imp(transform_display *dp, png_structp pp, png_infop pi) { case PNG_COLOR_TYPE_PALETTE: if (dp->output_bit_depth > 8) goto error; - /*FALL THROUGH*/ + /* FALLTHROUGH */ case PNG_COLOR_TYPE_GRAY: if (dp->output_bit_depth == 1 || dp->output_bit_depth == 2 || dp->output_bit_depth == 4) break; - /*FALL THROUGH*/ + /* FALLTHROUGH */ default: if (dp->output_bit_depth == 8 || dp->output_bit_depth == 16) break; - /*FALL THROUGH*/ + /* FALLTHROUGH */ error: { char message[128]; @@ -5354,7 +6610,8 @@ transform_info_imp(transform_display *dp, png_structp pp, png_infop pi) } /* Use a test pixel to check that the output agrees with what we expect - - * this avoids running the whole test if the output is unexpected. + * this avoids running the whole test if the output is unexpected. This also + * checks for internal errors. */ { image_pixel test_pixel; @@ -5369,7 +6626,7 @@ transform_info_imp(transform_display *dp, png_structp pp, png_infop pi) /* Don't need sBIT here, but it must be set to non-zero to avoid * arithmetic overflows. */ - test_pixel.have_tRNS = dp->this.is_transparent; + test_pixel.have_tRNS = dp->this.is_transparent != 0; test_pixel.red_sBIT = test_pixel.green_sBIT = test_pixel.blue_sBIT = test_pixel.alpha_sBIT = test_pixel.sample_depth; @@ -5400,29 +6657,48 @@ transform_info_imp(transform_display *dp, png_structp pp, png_infop pi) } /* If both bit depth and colour type are correct check the sample depth. - * I believe these are both internal errors. */ - if (test_pixel.colour_type == PNG_COLOR_TYPE_PALETTE) - { - if (test_pixel.sample_depth != 8) /* oops - internal error! */ - png_error(pp, "pngvalid: internal: palette sample depth not 8"); - } - else if (test_pixel.sample_depth != dp->output_bit_depth) + if (test_pixel.colour_type == PNG_COLOR_TYPE_PALETTE && + test_pixel.sample_depth != 8) /* oops - internal error! */ + png_error(pp, "pngvalid: internal: palette sample depth not 8"); + else if (dp->unpacked && test_pixel.bit_depth != 8) + png_error(pp, "pngvalid: internal: bad unpacked pixel depth"); + else if (!dp->unpacked && test_pixel.colour_type != PNG_COLOR_TYPE_PALETTE + && test_pixel.bit_depth != test_pixel.sample_depth) { char message[128]; size_t pos = safecat(message, sizeof message, 0, "internal: sample depth "); + /* Because unless something has set 'unpacked' or the image is palette + * mapped we expect the transform to keep sample depth and bit depth + * the same. + */ + pos = safecatn(message, sizeof message, pos, test_pixel.sample_depth); + pos = safecat(message, sizeof message, pos, " expected "); + pos = safecatn(message, sizeof message, pos, test_pixel.bit_depth); + + png_error(pp, message); + } + else if (test_pixel.bit_depth != dp->output_bit_depth) + { + /* This could be a libpng error too; libpng has not produced what we + * expect for the output bit depth. + */ + char message[128]; + size_t pos = safecat(message, sizeof message, 0, + "internal: bit depth "); + pos = safecatn(message, sizeof message, pos, dp->output_bit_depth); pos = safecat(message, sizeof message, pos, " expected "); - pos = safecatn(message, sizeof message, pos, test_pixel.sample_depth); + pos = safecatn(message, sizeof message, pos, test_pixel.bit_depth); png_error(pp, message); } } } -static void +static void PNGCBAPI transform_info(png_structp pp, png_infop pi) { transform_info_imp(voidcast(transform_display*, png_get_progressive_ptr(pp)), @@ -5430,10 +6706,10 @@ transform_info(png_structp pp, png_infop pi) } static void -transform_range_check(png_structp pp, unsigned int r, unsigned int g, +transform_range_check(png_const_structp pp, unsigned int r, unsigned int g, unsigned int b, unsigned int a, unsigned int in_digitized, double in, unsigned int out, png_byte sample_depth, double err, double limit, - PNG_CONST char *name, double digitization_error) + const char *name, double digitization_error) { /* Compare the scaled, digitzed, values of our local calculation (in+-err) * with the digitized values libpng produced; 'sample_depth' is the actual @@ -5444,7 +6720,7 @@ transform_range_check(png_structp pp, unsigned int r, unsigned int g, unsigned int max = (1U< limit || !(out >= in_min && out <= in_max)) + if (debugonly(err > limit ||) !(out >= in_min && out <= in_max)) { char message[256]; size_t pos; @@ -5470,26 +6746,29 @@ transform_range_check(png_structp pp, unsigned int r, unsigned int g, png_error(pp, message); } + + UNUSED(limit) } static void -transform_image_validate(transform_display *dp, png_structp pp, png_infop pi) +transform_image_validate(transform_display *dp, png_const_structp pp, + png_infop pi) { /* Constants for the loop below: */ - PNG_CONST png_store* PNG_CONST ps = dp->this.ps; - PNG_CONST png_byte in_ct = dp->this.colour_type; - PNG_CONST png_byte in_bd = dp->this.bit_depth; - PNG_CONST png_uint_32 w = dp->this.w; - PNG_CONST png_uint_32 h = dp->this.h; - PNG_CONST png_byte out_ct = dp->output_colour_type; - PNG_CONST png_byte out_bd = dp->output_bit_depth; - PNG_CONST png_byte sample_depth = (png_byte)(out_ct == - PNG_COLOR_TYPE_PALETTE ? 8 : out_bd); - PNG_CONST png_byte red_sBIT = dp->this.red_sBIT; - PNG_CONST png_byte green_sBIT = dp->this.green_sBIT; - PNG_CONST png_byte blue_sBIT = dp->this.blue_sBIT; - PNG_CONST png_byte alpha_sBIT = dp->this.alpha_sBIT; - PNG_CONST int have_tRNS = dp->this.is_transparent; + const png_store* const ps = dp->this.ps; + png_byte in_ct = dp->this.colour_type; + png_byte in_bd = dp->this.bit_depth; + png_uint_32 w = dp->this.w; + png_uint_32 h = dp->this.h; + png_byte out_ct = dp->output_colour_type; + png_byte out_bd = dp->output_bit_depth; + png_byte sample_depth = + (png_byte)(out_ct == PNG_COLOR_TYPE_PALETTE ? 8 : out_bd); + png_byte red_sBIT = dp->this.red_sBIT; + png_byte green_sBIT = dp->this.green_sBIT; + png_byte blue_sBIT = dp->this.blue_sBIT; + png_byte alpha_sBIT = dp->this.alpha_sBIT; + int have_tRNS = dp->this.is_transparent; double digitization_error; store_palette out_palette; @@ -5501,7 +6780,7 @@ transform_image_validate(transform_display *dp, png_structp pp, png_infop pi) store_image_check(dp->this.ps, pp, 0); /* Read the palette corresponding to the output if the output colour type - * indicates a palette, othewise set out_palette to garbage. + * indicates a palette, otherwise set out_palette to garbage. */ if (out_ct == PNG_COLOR_TYPE_PALETTE) { @@ -5522,12 +6801,9 @@ transform_image_validate(transform_display *dp, png_structp pp, png_infop pi) memset(out_palette, 0x5e, sizeof out_palette); - /* assume-8-bit-calculations means assume that if the input has 8 bit - * (or less) samples and the output has 16 bit samples the calculations - * will be done with 8 bit precision, not 16. - * - * TODO: fix this in libpng; png_set_expand_16 should cause 16 bit - * calculations to be used throughout. + /* use-input-precision means assume that if the input has 8 bit (or less) + * samples and the output has 16 bit samples the calculations will be done + * with 8 bit precision, not 16. */ if (in_ct == PNG_COLOR_TYPE_PALETTE || in_bd < 16) in_sample_depth = 8; @@ -5538,7 +6814,8 @@ transform_image_validate(transform_display *dp, png_structp pp, png_infop pi) !dp->pm->calculations_use_input_precision) digitization_error = .5; - /* Else errors are at 8 bit precision, scale .5 in 8 bits to the 16 bits: + /* Else calculations are at 8 bit precision, and the output actually + * consists of scaled 8-bit values, so scale .5 in 8 bits to the 16 bits: */ else digitization_error = .5 * 257; @@ -5546,7 +6823,7 @@ transform_image_validate(transform_display *dp, png_structp pp, png_infop pi) for (y=0; ythis.palette); + image_pixel_init(&in_pixel, std, in_ct, in_bd, x, dp->this.palette, + NULL); in_pixel.red_sBIT = red_sBIT; in_pixel.green_sBIT = green_sBIT; in_pixel.blue_sBIT = blue_sBIT; in_pixel.alpha_sBIT = alpha_sBIT; - in_pixel.have_tRNS = have_tRNS; + in_pixel.have_tRNS = have_tRNS != 0; /* For error detection, below. */ r = in_pixel.red; @@ -5577,12 +6855,18 @@ transform_image_validate(transform_display *dp, png_structp pp, png_infop pi) b = in_pixel.blue; a = in_pixel.alpha; + /* This applies the transforms to the input data, including output + * format operations which must be used when reading the output + * pixel that libpng produces. + */ dp->transform_list->mod(dp->transform_list, &in_pixel, pp, dp); /* Read the output pixel and compare it to what we got, we don't - * use the error field here, so no need to update sBIT. + * use the error field here, so no need to update sBIT. in_pixel + * says whether we expect libpng to change the output format. */ - image_pixel_init(&out_pixel, pRow, out_ct, out_bd, x, out_palette); + image_pixel_init(&out_pixel, pRow, out_ct, out_bd, x, out_palette, + &in_pixel); /* We don't expect changes to the index here even if the bit depth is * changed. @@ -5630,9 +6914,10 @@ transform_image_validate(transform_display *dp, png_structp pp, png_infop pi) dp->this.ps->validated = 1; } -static void -transform_end(png_structp pp, png_infop pi) +static void PNGCBAPI +transform_end(png_structp ppIn, png_infop pi) { + png_const_structp pp = ppIn; transform_display *dp = voidcast(transform_display*, png_get_progressive_ptr(pp)); @@ -5644,8 +6929,8 @@ transform_end(png_structp pp, png_infop pi) /* A single test run. */ static void -transform_test(png_modifier *pmIn, PNG_CONST png_uint_32 idIn, - PNG_CONST image_transform* transform_listIn, PNG_CONST char * volatile name) +transform_test(png_modifier *pmIn, png_uint_32 idIn, + const image_transform* transform_listIn, const char * const name) { transform_display d; context(&pmIn->this, fault); @@ -5721,7 +7006,7 @@ transform_test(png_modifier *pmIn, PNG_CONST png_uint_32 idIn, Catch(fault) { - modifier_reset((png_modifier*)fault); + modifier_reset(voidcast(png_modifier*,(void*)fault)); } } @@ -5746,16 +7031,20 @@ static image_transform ITSTRUCT(name) =\ #define PT ITSTRUCT(end) /* stores the previous transform */ /* To save code: */ -static void -image_transform_default_ini(PNG_CONST image_transform *this, +extern void image_transform_default_ini(const image_transform *this, + transform_display *that); /* silence GCC warnings */ + +void /* private, but almost always needed */ +image_transform_default_ini(const image_transform *this, transform_display *that) { this->next->ini(this->next, that); } +#ifdef PNG_READ_BACKGROUND_SUPPORTED static int image_transform_default_add(image_transform *this, - PNG_CONST image_transform **that, png_byte colour_type, png_byte bit_depth) + const image_transform **that, png_byte colour_type, png_byte bit_depth) { UNUSED(colour_type) UNUSED(bit_depth) @@ -5765,11 +7054,12 @@ image_transform_default_add(image_transform *this, return 1; } +#endif #ifdef PNG_READ_EXPAND_SUPPORTED /* png_set_palette_to_rgb */ static void -image_transform_png_set_palette_to_rgb_set(PNG_CONST image_transform *this, +image_transform_png_set_palette_to_rgb_set(const image_transform *this, transform_display *that, png_structp pp, png_infop pi) { png_set_palette_to_rgb(pp); @@ -5777,8 +7067,9 @@ image_transform_png_set_palette_to_rgb_set(PNG_CONST image_transform *this, } static void -image_transform_png_set_palette_to_rgb_mod(PNG_CONST image_transform *this, - image_pixel *that, png_structp pp, PNG_CONST transform_display *display) +image_transform_png_set_palette_to_rgb_mod(const image_transform *this, + image_pixel *that, png_const_structp pp, + const transform_display *display) { if (that->colour_type == PNG_COLOR_TYPE_PALETTE) image_pixel_convert_PLTE(that); @@ -5788,7 +7079,7 @@ image_transform_png_set_palette_to_rgb_mod(PNG_CONST image_transform *this, static int image_transform_png_set_palette_to_rgb_add(image_transform *this, - PNG_CONST image_transform **that, png_byte colour_type, png_byte bit_depth) + const image_transform **that, png_byte colour_type, png_byte bit_depth) { UNUSED(bit_depth) @@ -5806,27 +7097,42 @@ IT(palette_to_rgb); #ifdef PNG_READ_EXPAND_SUPPORTED /* png_set_tRNS_to_alpha */ static void -image_transform_png_set_tRNS_to_alpha_set(PNG_CONST image_transform *this, +image_transform_png_set_tRNS_to_alpha_set(const image_transform *this, transform_display *that, png_structp pp, png_infop pi) { png_set_tRNS_to_alpha(pp); + + /* If there was a tRNS chunk that would get expanded and add an alpha + * channel is_transparent must be updated: + */ + if (that->this.has_tRNS) + that->this.is_transparent = 1; + this->next->set(this->next, that, pp, pi); } static void -image_transform_png_set_tRNS_to_alpha_mod(PNG_CONST image_transform *this, - image_pixel *that, png_structp pp, PNG_CONST transform_display *display) +image_transform_png_set_tRNS_to_alpha_mod(const image_transform *this, + image_pixel *that, png_const_structp pp, + const transform_display *display) { +#if PNG_LIBPNG_VER < 10700 /* LIBPNG BUG: this always forces palette images to RGB. */ if (that->colour_type == PNG_COLOR_TYPE_PALETTE) image_pixel_convert_PLTE(that); +#endif /* This effectively does an 'expand' only if there is some transparency to * convert to an alpha channel. */ if (that->have_tRNS) - image_pixel_add_alpha(that, &display->this); +# if PNG_LIBPNG_VER >= 10700 + if (that->colour_type != PNG_COLOR_TYPE_PALETTE && + (that->colour_type & PNG_COLOR_MASK_ALPHA) == 0) +# endif + image_pixel_add_alpha(that, &display->this, 0/*!for background*/); +#if PNG_LIBPNG_VER < 10700 /* LIBPNG BUG: otherwise libpng still expands to 8 bits! */ else { @@ -5835,13 +7141,14 @@ image_transform_png_set_tRNS_to_alpha_mod(PNG_CONST image_transform *this, if (that->sample_depth < 8) that->sample_depth = 8; } +#endif this->next->mod(this->next, that, pp, display); } static int image_transform_png_set_tRNS_to_alpha_add(image_transform *this, - PNG_CONST image_transform **that, png_byte colour_type, png_byte bit_depth) + const image_transform **that, png_byte colour_type, png_byte bit_depth) { UNUSED(bit_depth) @@ -5850,9 +7157,14 @@ image_transform_png_set_tRNS_to_alpha_add(image_transform *this, /* We don't know yet whether there will be a tRNS chunk, but we know that * this transformation should do nothing if there already is an alpha - * channel. + * channel. In addition, after the bug fix in 1.7.0, there is no longer + * any action on a palette image. */ - return (colour_type & PNG_COLOR_MASK_ALPHA) == 0; + return +# if PNG_LIBPNG_VER >= 10700 + colour_type != PNG_COLOR_TYPE_PALETTE && +# endif + (colour_type & PNG_COLOR_MASK_ALPHA) == 0; } IT(tRNS_to_alpha); @@ -5863,16 +7175,18 @@ IT(tRNS_to_alpha); #ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED /* png_set_gray_to_rgb */ static void -image_transform_png_set_gray_to_rgb_set(PNG_CONST image_transform *this, +image_transform_png_set_gray_to_rgb_set(const image_transform *this, transform_display *that, png_structp pp, png_infop pi) { png_set_gray_to_rgb(pp); + /* NOTE: this doesn't result in tRNS expansion. */ this->next->set(this->next, that, pp, pi); } static void -image_transform_png_set_gray_to_rgb_mod(PNG_CONST image_transform *this, - image_pixel *that, png_structp pp, PNG_CONST transform_display *display) +image_transform_png_set_gray_to_rgb_mod(const image_transform *this, + image_pixel *that, png_const_structp pp, + const transform_display *display) { /* NOTE: we can actually pend the tRNS processing at this point because we * can correctly recognize the original pixel value even though we have @@ -5880,7 +7194,7 @@ image_transform_png_set_gray_to_rgb_mod(PNG_CONST image_transform *this, * doesn't do this, so we don't either. */ if ((that->colour_type & PNG_COLOR_MASK_COLOR) == 0 && that->have_tRNS) - image_pixel_add_alpha(that, &display->this); + image_pixel_add_alpha(that, &display->this, 0/*!for background*/); /* Simply expand the bit depth and alter the colour type as required. */ if (that->colour_type == PNG_COLOR_TYPE_GRAY) @@ -5903,7 +7217,7 @@ image_transform_png_set_gray_to_rgb_mod(PNG_CONST image_transform *this, static int image_transform_png_set_gray_to_rgb_add(image_transform *this, - PNG_CONST image_transform **that, png_byte colour_type, png_byte bit_depth) + const image_transform **that, png_byte colour_type, png_byte bit_depth) { UNUSED(bit_depth) @@ -5921,16 +7235,21 @@ IT(gray_to_rgb); #ifdef PNG_READ_EXPAND_SUPPORTED /* png_set_expand */ static void -image_transform_png_set_expand_set(PNG_CONST image_transform *this, +image_transform_png_set_expand_set(const image_transform *this, transform_display *that, png_structp pp, png_infop pi) { png_set_expand(pp); + + if (that->this.has_tRNS) + that->this.is_transparent = 1; + this->next->set(this->next, that, pp, pi); } static void -image_transform_png_set_expand_mod(PNG_CONST image_transform *this, - image_pixel *that, png_structp pp, PNG_CONST transform_display *display) +image_transform_png_set_expand_mod(const image_transform *this, + image_pixel *that, png_const_structp pp, + const transform_display *display) { /* The general expand case depends on what the colour type is: */ if (that->colour_type == PNG_COLOR_TYPE_PALETTE) @@ -5939,14 +7258,14 @@ image_transform_png_set_expand_mod(PNG_CONST image_transform *this, that->sample_depth = that->bit_depth = 8; if (that->have_tRNS) - image_pixel_add_alpha(that, &display->this); + image_pixel_add_alpha(that, &display->this, 0/*!for background*/); this->next->mod(this->next, that, pp, display); } static int image_transform_png_set_expand_add(image_transform *this, - PNG_CONST image_transform **that, png_byte colour_type, png_byte bit_depth) + const image_transform **that, png_byte colour_type, png_byte bit_depth) { UNUSED(bit_depth) @@ -5966,31 +7285,53 @@ IT(expand); #ifdef PNG_READ_EXPAND_SUPPORTED /* png_set_expand_gray_1_2_4_to_8 - * LIBPNG BUG: this just does an 'expand' + * Pre 1.7.0 LIBPNG BUG: this just does an 'expand' */ static void image_transform_png_set_expand_gray_1_2_4_to_8_set( - PNG_CONST image_transform *this, transform_display *that, png_structp pp, + const image_transform *this, transform_display *that, png_structp pp, png_infop pi) { png_set_expand_gray_1_2_4_to_8(pp); + /* NOTE: don't expect this to expand tRNS */ this->next->set(this->next, that, pp, pi); } static void image_transform_png_set_expand_gray_1_2_4_to_8_mod( - PNG_CONST image_transform *this, image_pixel *that, png_structp pp, - PNG_CONST transform_display *display) + const image_transform *this, image_pixel *that, png_const_structp pp, + const transform_display *display) { +#if PNG_LIBPNG_VER < 10700 image_transform_png_set_expand_mod(this, that, pp, display); +#else + /* Only expand grayscale of bit depth less than 8: */ + if (that->colour_type == PNG_COLOR_TYPE_GRAY && + that->bit_depth < 8) + that->sample_depth = that->bit_depth = 8; + + this->next->mod(this->next, that, pp, display); +#endif /* 1.7 or later */ } static int image_transform_png_set_expand_gray_1_2_4_to_8_add(image_transform *this, - PNG_CONST image_transform **that, png_byte colour_type, png_byte bit_depth) + const image_transform **that, png_byte colour_type, png_byte bit_depth) { +#if PNG_LIBPNG_VER < 10700 return image_transform_png_set_expand_add(this, that, colour_type, bit_depth); +#else + UNUSED(bit_depth) + + this->next = *that; + *that = this; + + /* This should do nothing unless the color type is gray and the bit depth is + * less than 8: + */ + return colour_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8; +#endif /* 1.7 or later */ } IT(expand_gray_1_2_4_to_8); @@ -6001,16 +7342,24 @@ IT(expand_gray_1_2_4_to_8); #ifdef PNG_READ_EXPAND_16_SUPPORTED /* png_set_expand_16 */ static void -image_transform_png_set_expand_16_set(PNG_CONST image_transform *this, +image_transform_png_set_expand_16_set(const image_transform *this, transform_display *that, png_structp pp, png_infop pi) { png_set_expand_16(pp); + + /* NOTE: prior to 1.7 libpng does SET_EXPAND as well, so tRNS is expanded. */ +# if PNG_LIBPNG_VER < 10700 + if (that->this.has_tRNS) + that->this.is_transparent = 1; +# endif + this->next->set(this->next, that, pp, pi); } static void -image_transform_png_set_expand_16_mod(PNG_CONST image_transform *this, - image_pixel *that, png_structp pp, PNG_CONST transform_display *display) +image_transform_png_set_expand_16_mod(const image_transform *this, + image_pixel *that, png_const_structp pp, + const transform_display *display) { /* Expect expand_16 to expand everything to 16 bits as a result of also * causing 'expand' to happen. @@ -6019,7 +7368,7 @@ image_transform_png_set_expand_16_mod(PNG_CONST image_transform *this, image_pixel_convert_PLTE(that); if (that->have_tRNS) - image_pixel_add_alpha(that, &display->this); + image_pixel_add_alpha(that, &display->this, 0/*!for background*/); if (that->bit_depth < 16) that->sample_depth = that->bit_depth = 16; @@ -6029,7 +7378,7 @@ image_transform_png_set_expand_16_mod(PNG_CONST image_transform *this, static int image_transform_png_set_expand_16_add(image_transform *this, - PNG_CONST image_transform **that, png_byte colour_type, png_byte bit_depth) + const image_transform **that, png_byte colour_type, png_byte bit_depth) { UNUSED(colour_type) @@ -6048,16 +7397,21 @@ IT(expand_16); #ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED /* API added in 1.5.4 */ /* png_set_scale_16 */ static void -image_transform_png_set_scale_16_set(PNG_CONST image_transform *this, +image_transform_png_set_scale_16_set(const image_transform *this, transform_display *that, png_structp pp, png_infop pi) { png_set_scale_16(pp); +# if PNG_LIBPNG_VER < 10700 + /* libpng will limit the gamma table size: */ + that->max_gamma_8 = PNG_MAX_GAMMA_8; +# endif this->next->set(this->next, that, pp, pi); } static void -image_transform_png_set_scale_16_mod(PNG_CONST image_transform *this, - image_pixel *that, png_structp pp, PNG_CONST transform_display *display) +image_transform_png_set_scale_16_mod(const image_transform *this, + image_pixel *that, png_const_structp pp, + const transform_display *display) { if (that->bit_depth == 16) { @@ -6073,7 +7427,7 @@ image_transform_png_set_scale_16_mod(PNG_CONST image_transform *this, static int image_transform_png_set_scale_16_add(image_transform *this, - PNG_CONST image_transform **that, png_byte colour_type, png_byte bit_depth) + const image_transform **that, png_byte colour_type, png_byte bit_depth) { UNUSED(colour_type) @@ -6091,16 +7445,21 @@ IT(scale_16); #ifdef PNG_READ_16_TO_8_SUPPORTED /* the default before 1.5.4 */ /* png_set_strip_16 */ static void -image_transform_png_set_strip_16_set(PNG_CONST image_transform *this, +image_transform_png_set_strip_16_set(const image_transform *this, transform_display *that, png_structp pp, png_infop pi) { png_set_strip_16(pp); +# if PNG_LIBPNG_VER < 10700 + /* libpng will limit the gamma table size: */ + that->max_gamma_8 = PNG_MAX_GAMMA_8; +# endif this->next->set(this->next, that, pp, pi); } static void -image_transform_png_set_strip_16_mod(PNG_CONST image_transform *this, - image_pixel *that, png_structp pp, PNG_CONST transform_display *display) +image_transform_png_set_strip_16_mod(const image_transform *this, + image_pixel *that, png_const_structp pp, + const transform_display *display) { if (that->bit_depth == 16) { @@ -6125,7 +7484,7 @@ image_transform_png_set_strip_16_mod(PNG_CONST image_transform *this, * png_set_scale_16 API in 1.5.4 (but 1.5.4+ always defines the above!) */ { - PNG_CONST double d = (255-128.5)/65535; + const double d = (255-128.5)/65535; that->rede += d; that->greene += d; that->bluee += d; @@ -6139,7 +7498,7 @@ image_transform_png_set_strip_16_mod(PNG_CONST image_transform *this, static int image_transform_png_set_strip_16_add(image_transform *this, - PNG_CONST image_transform **that, png_byte colour_type, png_byte bit_depth) + const image_transform **that, png_byte colour_type, png_byte bit_depth) { UNUSED(colour_type) @@ -6157,7 +7516,7 @@ IT(strip_16); #ifdef PNG_READ_STRIP_ALPHA_SUPPORTED /* png_set_strip_alpha */ static void -image_transform_png_set_strip_alpha_set(PNG_CONST image_transform *this, +image_transform_png_set_strip_alpha_set(const image_transform *this, transform_display *that, png_structp pp, png_infop pi) { png_set_strip_alpha(pp); @@ -6165,8 +7524,9 @@ image_transform_png_set_strip_alpha_set(PNG_CONST image_transform *this, } static void -image_transform_png_set_strip_alpha_mod(PNG_CONST image_transform *this, - image_pixel *that, png_structp pp, PNG_CONST transform_display *display) +image_transform_png_set_strip_alpha_mod(const image_transform *this, + image_pixel *that, png_const_structp pp, + const transform_display *display) { if (that->colour_type == PNG_COLOR_TYPE_GRAY_ALPHA) that->colour_type = PNG_COLOR_TYPE_GRAY; @@ -6181,7 +7541,7 @@ image_transform_png_set_strip_alpha_mod(PNG_CONST image_transform *this, static int image_transform_png_set_strip_alpha_add(image_transform *this, - PNG_CONST image_transform **that, png_byte colour_type, png_byte bit_depth) + const image_transform **that, png_byte colour_type, png_byte bit_depth) { UNUSED(bit_depth) @@ -6202,7 +7562,8 @@ IT(strip_alpha); * png_fixed_point green) * png_get_rgb_to_gray_status * - * The 'default' test here uses values known to be used inside libpng: + * The 'default' test here uses values known to be used inside libpng prior to + * 1.7.0: * * red: 6968 * green: 23434 @@ -6239,11 +7600,11 @@ static struct #undef image_transform_ini #define image_transform_ini image_transform_png_set_rgb_to_gray_ini static void -image_transform_png_set_rgb_to_gray_ini(PNG_CONST image_transform *this, +image_transform_png_set_rgb_to_gray_ini(const image_transform *this, transform_display *that) { png_modifier *pm = that->pm; - PNG_CONST color_encoding *e = pm->current_encoding; + const color_encoding *e = pm->current_encoding; UNUSED(this) @@ -6258,7 +7619,7 @@ image_transform_png_set_rgb_to_gray_ini(PNG_CONST image_transform *this, /* Coefficients come from the encoding, but may need to be normalized to a * white point Y of 1.0 */ - PNG_CONST double whiteY = e->red.Y + e->green.Y + e->blue.Y; + const double whiteY = e->red.Y + e->green.Y + e->blue.Y; data.red_coefficient = e->red.Y; data.green_coefficient = e->green.Y; @@ -6275,9 +7636,15 @@ image_transform_png_set_rgb_to_gray_ini(PNG_CONST image_transform *this, else { /* The default (built in) coeffcients, as above: */ - data.red_coefficient = 6968 / 32768.; - data.green_coefficient = 23434 / 32768.; - data.blue_coefficient = 2366 / 32768.; +# if PNG_LIBPNG_VER < 10700 + data.red_coefficient = 6968 / 32768.; + data.green_coefficient = 23434 / 32768.; + data.blue_coefficient = 2366 / 32768.; +# else + data.red_coefficient = .2126; + data.green_coefficient = .7152; + data.blue_coefficient = .0722; +# endif } data.gamma = pm->current_gamma; @@ -6311,7 +7678,7 @@ image_transform_png_set_rgb_to_gray_ini(PNG_CONST image_transform *this, png_uint_32 ru; double total; - RANDOMIZE(ru); + ru = random_u32(); data.green_coefficient = total = (ru & 0xffff) / 65535.; ru >>= 16; data.red_coefficient = (1 - total) * (ru & 0xffff) / 65535.; @@ -6343,10 +7710,24 @@ image_transform_png_set_rgb_to_gray_ini(PNG_CONST image_transform *this, { if (that->this.bit_depth == 16 || pm->assume_16_bit_calculations) { - /* The 16 bit case ends up producing a maximum error of about - * +/-5 in 65535, allow for +/-8 with the given gamma. + /* The computations have the form: + * + * r * rc + g * gc + b * bc + * + * Each component of which is +/-1/65535 from the gamma_to_1 table + * lookup, resulting in a base error of +/-6. The gamma_from_1 + * conversion adds another +/-2 in the 16-bit case and + * +/-(1<<(15-PNG_MAX_GAMMA_8)) in the 8-bit case. */ - that->pm->limit += pow(8./65535, data.gamma); +# if PNG_LIBPNG_VER < 10700 + if (that->this.bit_depth < 16) + that->max_gamma_8 = PNG_MAX_GAMMA_8; +# endif + that->pm->limit += pow( + (that->this.bit_depth == 16 || that->max_gamma_8 > 14 ? + 8. : + 6. + (1<<(15-that->max_gamma_8)) + )/65535, data.gamma); } else @@ -6354,8 +7735,18 @@ image_transform_png_set_rgb_to_gray_ini(PNG_CONST image_transform *this, /* Rounding to 8 bits in the linear space causes massive errors which * will trigger the error check in transform_range_check. Fix that * here by taking the gamma encoding into account. + * + * When DIGITIZE is set because a pre-1.7 version of libpng is being + * tested allow a bigger slack. + * + * NOTE: this number only affects the internal limit check in pngvalid, + * it has no effect on the limits applied to the libpng values. */ - that->pm->limit += pow(1./255, data.gamma); +#if DIGITIZE + that->pm->limit += pow( 2.0/255, data.gamma); +#else + that->pm->limit += pow( 1.0/255, data.gamma); +#endif } } @@ -6364,16 +7755,16 @@ image_transform_png_set_rgb_to_gray_ini(PNG_CONST image_transform *this, /* With no gamma correction a large error comes from the truncation of the * calculation in the 8 bit case, allow for that here. */ - if (that->this.bit_depth != 16) + if (that->this.bit_depth != 16 && !pm->assume_16_bit_calculations) that->pm->limit += 4E-3; } } static void -image_transform_png_set_rgb_to_gray_set(PNG_CONST image_transform *this, +image_transform_png_set_rgb_to_gray_set(const image_transform *this, transform_display *that, png_structp pp, png_infop pi) { - PNG_CONST int error_action = 1; /* no error, no defines in png.h */ + int error_action = 1; /* no error, no defines in png.h */ # ifdef PNG_FLOATING_POINT_SUPPORTED png_set_rgb_to_gray(pp, error_action, data.red_to_set, data.green_to_set); @@ -6410,7 +7801,7 @@ image_transform_png_set_rgb_to_gray_set(PNG_CONST image_transform *this, & PNG_INFO_cHRM) != 0) { double maxe; - PNG_CONST char *el; + const char *el; color_encoding e, o; /* Expect libpng to return a normalized result, but the original @@ -6497,20 +7888,32 @@ image_transform_png_set_rgb_to_gray_set(PNG_CONST image_transform *this, } static void -image_transform_png_set_rgb_to_gray_mod(PNG_CONST image_transform *this, - image_pixel *that, png_structp pp, PNG_CONST transform_display *display) +image_transform_png_set_rgb_to_gray_mod(const image_transform *this, + image_pixel *that, png_const_structp pp, + const transform_display *display) { if ((that->colour_type & PNG_COLOR_MASK_COLOR) != 0) { double gray, err; - if (that->colour_type == PNG_COLOR_TYPE_PALETTE) - image_pixel_convert_PLTE(that); +# if PNG_LIBPNG_VER < 10700 + if (that->colour_type == PNG_COLOR_TYPE_PALETTE) + image_pixel_convert_PLTE(that); +# endif /* Image now has RGB channels... */ +# if DIGITIZE { - PNG_CONST png_modifier *pm = display->pm; - PNG_CONST unsigned int sample_depth = that->sample_depth; + png_modifier *pm = display->pm; + unsigned int sample_depth = that->sample_depth; + unsigned int calc_depth = (pm->assume_16_bit_calculations ? 16 : + sample_depth); + unsigned int gamma_depth = + (sample_depth == 16 ? + display->max_gamma_8 : + (pm->assume_16_bit_calculations ? + display->max_gamma_8 : + sample_depth)); int isgray; double r, g, b; double rlo, rhi, glo, ghi, blo, bhi, graylo, grayhi; @@ -6523,56 +7926,73 @@ image_transform_png_set_rgb_to_gray_mod(PNG_CONST image_transform *this, * will be identical after this operation if there is only one * transform, feel free to delete the png_error checks on this below in * the future (this is just me trying to ensure it works!) + * + * Interval arithmetic is exact, but to implement it it must be + * possible to control the floating point implementation rounding mode. + * This cannot be done in ANSI-C, so instead I reduce the 'lo' values + * by DBL_EPSILON and increase the 'hi' values by the same. */ +# define DD(v,d,r) (digitize(v*(1-DBL_EPSILON), d, r) * (1-DBL_EPSILON)) +# define DU(v,d,r) (digitize(v*(1+DBL_EPSILON), d, r) * (1+DBL_EPSILON)) + r = rlo = rhi = that->redf; rlo -= that->rede; - rlo = digitize(pm, rlo, sample_depth, 1/*round*/); + rlo = DD(rlo, calc_depth, 1/*round*/); rhi += that->rede; - rhi = digitize(pm, rhi, sample_depth, 1/*round*/); + rhi = DU(rhi, calc_depth, 1/*round*/); g = glo = ghi = that->greenf; glo -= that->greene; - glo = digitize(pm, glo, sample_depth, 1/*round*/); + glo = DD(glo, calc_depth, 1/*round*/); ghi += that->greene; - ghi = digitize(pm, ghi, sample_depth, 1/*round*/); + ghi = DU(ghi, calc_depth, 1/*round*/); b = blo = bhi = that->bluef; blo -= that->bluee; - blo = digitize(pm, blo, sample_depth, 1/*round*/); - bhi += that->greene; - bhi = digitize(pm, bhi, sample_depth, 1/*round*/); + blo = DD(blo, calc_depth, 1/*round*/); + bhi += that->bluee; + bhi = DU(bhi, calc_depth, 1/*round*/); isgray = r==g && g==b; if (data.gamma != 1) { - PNG_CONST double power = 1/data.gamma; - PNG_CONST double abse = abserr(pm, sample_depth, sample_depth); + const double power = 1/data.gamma; + const double abse = .5/(sample_depth == 16 ? 65535 : 255); - /* 'abse' is the absolute error permitted in linear calculations. It - * is used here to capture the error permitted in the handling - * (undoing) of the gamma encoding. Once again digitization occurs - * to handle the upper and lower bounds of the values. This is - * where the real errors are introduced. + /* If a gamma calculation is done it is done using lookup tables of + * precision gamma_depth, so the already digitized value above may + * need to be further digitized here. */ + if (gamma_depth != calc_depth) + { + rlo = DD(rlo, gamma_depth, 0/*truncate*/); + rhi = DU(rhi, gamma_depth, 0/*truncate*/); + glo = DD(glo, gamma_depth, 0/*truncate*/); + ghi = DU(ghi, gamma_depth, 0/*truncate*/); + blo = DD(blo, gamma_depth, 0/*truncate*/); + bhi = DU(bhi, gamma_depth, 0/*truncate*/); + } + + /* 'abse' is the error in the gamma table calculation itself. */ r = pow(r, power); - rlo = digitize(pm, pow(rlo, power)-abse, sample_depth, 1); - rhi = digitize(pm, pow(rhi, power)+abse, sample_depth, 1); + rlo = DD(pow(rlo, power)-abse, calc_depth, 1); + rhi = DU(pow(rhi, power)+abse, calc_depth, 1); g = pow(g, power); - glo = digitize(pm, pow(glo, power)-abse, sample_depth, 1); - ghi = digitize(pm, pow(ghi, power)+abse, sample_depth, 1); + glo = DD(pow(glo, power)-abse, calc_depth, 1); + ghi = DU(pow(ghi, power)+abse, calc_depth, 1); b = pow(b, power); - blo = digitize(pm, pow(blo, power)-abse, sample_depth, 1); - bhi = digitize(pm, pow(bhi, power)+abse, sample_depth, 1); + blo = DD(pow(blo, power)-abse, calc_depth, 1); + bhi = DU(pow(bhi, power)+abse, calc_depth, 1); } /* Now calculate the actual gray values. Although the error in the * coefficients depends on whether they were specified on the command * line (in which case truncation to 15 bits happened) or not (rounding - * was used) the maxium error in an individual coefficient is always - * 1/32768, because even in the rounding case the requirement that + * was used) the maximum error in an individual coefficient is always + * 2/32768, because even in the rounding case the requirement that * coefficients add up to 32768 can cause a larger rounding error. * * The only time when rounding doesn't occur in 1.5.5 and later is when @@ -6582,32 +8002,46 @@ image_transform_png_set_rgb_to_gray_mod(PNG_CONST image_transform *this, b * data.blue_coefficient; { - PNG_CONST int do_round = data.gamma != 1 || sample_depth == 16; - PNG_CONST double ce = 1. / 32768; + int do_round = data.gamma != 1 || calc_depth == 16; + const double ce = 2. / 32768; - graylo = digitize(pm, rlo * (data.red_coefficient-ce) + + graylo = DD(rlo * (data.red_coefficient-ce) + glo * (data.green_coefficient-ce) + - blo * (data.blue_coefficient-ce), sample_depth, do_round); - if (graylo <= 0) - graylo = 0; + blo * (data.blue_coefficient-ce), calc_depth, do_round); + if (graylo > gray) /* always accept the right answer */ + graylo = gray; - grayhi = digitize(pm, rhi * (data.red_coefficient+ce) + + grayhi = DU(rhi * (data.red_coefficient+ce) + ghi * (data.green_coefficient+ce) + - bhi * (data.blue_coefficient+ce), sample_depth, do_round); - if (grayhi >= 1) - grayhi = 1; + bhi * (data.blue_coefficient+ce), calc_depth, do_round); + if (grayhi < gray) + grayhi = gray; } /* And invert the gamma. */ if (data.gamma != 1) { - PNG_CONST double power = data.gamma; + const double power = data.gamma; + + /* And this happens yet again, shifting the values once more. */ + if (gamma_depth != sample_depth) + { + rlo = DD(rlo, gamma_depth, 0/*truncate*/); + rhi = DU(rhi, gamma_depth, 0/*truncate*/); + glo = DD(glo, gamma_depth, 0/*truncate*/); + ghi = DU(ghi, gamma_depth, 0/*truncate*/); + blo = DD(blo, gamma_depth, 0/*truncate*/); + bhi = DU(bhi, gamma_depth, 0/*truncate*/); + } gray = pow(gray, power); - graylo = digitize(pm, pow(graylo, power), sample_depth, 1); - grayhi = digitize(pm, pow(grayhi, power), sample_depth, 1); + graylo = DD(pow(graylo, power), sample_depth, 1); + grayhi = DU(pow(grayhi, power), sample_depth, 1); } +# undef DD +# undef DU + /* Now the error can be calculated. * * If r==g==b because there is no overall gamma correction libpng @@ -6619,11 +8053,13 @@ image_transform_png_set_rgb_to_gray_mod(PNG_CONST image_transform *this, else { err = fabs(grayhi-gray); + if (fabs(gray - graylo) > err) err = fabs(graylo-gray); +#if !RELEASE_BUILD /* Check that this worked: */ - if (err > display->pm->limit) + if (err > pm->limit) { size_t pos = 0; char buffer[128]; @@ -6631,17 +8067,147 @@ image_transform_png_set_rgb_to_gray_mod(PNG_CONST image_transform *this, pos = safecat(buffer, sizeof buffer, pos, "rgb_to_gray error "); pos = safecatd(buffer, sizeof buffer, pos, err, 6); pos = safecat(buffer, sizeof buffer, pos, " exceeds limit "); - pos = safecatd(buffer, sizeof buffer, pos, - display->pm->limit, 6); - png_error(pp, buffer); + pos = safecatd(buffer, sizeof buffer, pos, pm->limit, 6); + png_warning(pp, buffer); + pm->limit = err; } +#endif /* !RELEASE_BUILD */ } } +# else /* !DIGITIZE */ + { + double r = that->redf; + double re = that->rede; + double g = that->greenf; + double ge = that->greene; + double b = that->bluef; + double be = that->bluee; + +# if PNG_LIBPNG_VER < 10700 + /* The true gray case involves no math in earlier versions (not + * true, there was some if gamma correction was happening too.) + */ + if (r == g && r == b) + { + gray = r; + err = re; + if (err < ge) err = ge; + if (err < be) err = be; + } + + else +# endif /* before 1.7 */ + if (data.gamma == 1) + { + /* There is no need to do the conversions to and from linear space, + * so the calculation should be a lot more accurate. There is a + * built in error in the coefficients because they only have 15 bits + * and are adjusted to make sure they add up to 32768. This + * involves a integer calculation with truncation of the form: + * + * ((int)(coefficient * 100000) * 32768)/100000 + * + * This is done to the red and green coefficients (the ones + * provided to the API) then blue is calculated from them so the + * result adds up to 32768. In the worst case this can result in + * a -1 error in red and green and a +2 error in blue. Consequently + * the worst case in the calculation below is 2/32768 error. + * + * TODO: consider fixing this in libpng by rounding the calculation + * limiting the error to 1/32768. + * + * Handling this by adding 2/32768 here avoids needing to increase + * the global error limits to take this into account.) + */ + gray = r * data.red_coefficient + g * data.green_coefficient + + b * data.blue_coefficient; + err = re * data.red_coefficient + ge * data.green_coefficient + + be * data.blue_coefficient + 2./32768 + gray * 5 * DBL_EPSILON; + } + + else + { + /* The calculation happens in linear space, and this produces much + * wider errors in the encoded space. These are handled here by + * factoring the errors in to the calculation. There are two table + * lookups in the calculation and each introduces a quantization + * error defined by the table size. + */ + png_modifier *pm = display->pm; + double in_qe = (that->sample_depth > 8 ? .5/65535 : .5/255); + double out_qe = (that->sample_depth > 8 ? .5/65535 : + (pm->assume_16_bit_calculations ? .5/(1<max_gamma_8) : + .5/255)); + double rhi, ghi, bhi, grayhi; + double g1 = 1/data.gamma; + + rhi = r + re + in_qe; if (rhi > 1) rhi = 1; + r -= re + in_qe; if (r < 0) r = 0; + ghi = g + ge + in_qe; if (ghi > 1) ghi = 1; + g -= ge + in_qe; if (g < 0) g = 0; + bhi = b + be + in_qe; if (bhi > 1) bhi = 1; + b -= be + in_qe; if (b < 0) b = 0; + + r = pow(r, g1)*(1-DBL_EPSILON); rhi = pow(rhi, g1)*(1+DBL_EPSILON); + g = pow(g, g1)*(1-DBL_EPSILON); ghi = pow(ghi, g1)*(1+DBL_EPSILON); + b = pow(b, g1)*(1-DBL_EPSILON); bhi = pow(bhi, g1)*(1+DBL_EPSILON); + + /* Work out the lower and upper bounds for the gray value in the + * encoded space, then work out an average and error. Remove the + * previously added input quantization error at this point. + */ + gray = r * data.red_coefficient + g * data.green_coefficient + + b * data.blue_coefficient - 2./32768 - out_qe; + if (gray <= 0) + gray = 0; + else + { + gray *= (1 - 6 * DBL_EPSILON); + gray = pow(gray, data.gamma) * (1-DBL_EPSILON); + } + + grayhi = rhi * data.red_coefficient + ghi * data.green_coefficient + + bhi * data.blue_coefficient + 2./32768 + out_qe; + grayhi *= (1 + 6 * DBL_EPSILON); + if (grayhi >= 1) + grayhi = 1; + else + grayhi = pow(grayhi, data.gamma) * (1+DBL_EPSILON); + + err = (grayhi - gray) / 2; + gray = (grayhi + gray) / 2; + + if (err <= in_qe) + err = gray * DBL_EPSILON; + + else + err -= in_qe; + +#if !RELEASE_BUILD + /* Validate that the error is within limits (this has caused + * problems before, it's much easier to detect them here.) + */ + if (err > pm->limit) + { + size_t pos = 0; + char buffer[128]; + + pos = safecat(buffer, sizeof buffer, pos, "rgb_to_gray error "); + pos = safecatd(buffer, sizeof buffer, pos, err, 6); + pos = safecat(buffer, sizeof buffer, pos, " exceeds limit "); + pos = safecatd(buffer, sizeof buffer, pos, pm->limit, 6); + png_warning(pp, buffer); + pm->limit = err; + } +#endif /* !RELEASE_BUILD */ + } + } +# endif /* !DIGITIZE */ that->bluef = that->greenf = that->redf = gray; that->bluee = that->greene = that->rede = err; - /* The sBIT is the minium of the three colour channel sBITs. */ + /* The sBIT is the minimum of the three colour channel sBITs. */ if (that->red_sBIT > that->green_sBIT) that->red_sBIT = that->green_sBIT; if (that->red_sBIT > that->blue_sBIT) @@ -6660,7 +8226,7 @@ image_transform_png_set_rgb_to_gray_mod(PNG_CONST image_transform *this, static int image_transform_png_set_rgb_to_gray_add(image_transform *this, - PNG_CONST image_transform **that, png_byte colour_type, png_byte bit_depth) + const image_transform **that, png_byte colour_type, png_byte bit_depth) { UNUSED(bit_depth) @@ -6685,17 +8251,18 @@ IT(rgb_to_gray); * int background_gamma_code, int need_expand, * png_fixed_point background_gamma) * - * As with rgb_to_gray this ignores the gamma (at present.) + * This ignores the gamma (at present.) */ #define data ITDATA(background) static image_pixel data; static void -image_transform_png_set_background_set(PNG_CONST image_transform *this, +image_transform_png_set_background_set(const image_transform *this, transform_display *that, png_structp pp, png_infop pi) { png_byte colour_type, bit_depth; png_byte random_bytes[8]; /* 8 bytes - 64 bits - the biggest pixel */ + int expand; png_color_16 back; /* We need a background colour, because we don't know exactly what transforms @@ -6703,7 +8270,7 @@ image_transform_png_set_background_set(PNG_CONST image_transform *this, * so we need to know what that is! The background colour is stored in the * transform_display. */ - RANDOMIZE(random_bytes); + R8(random_bytes); /* Read the random value, for colour type 3 the background colour is actually * expressed as a 24bit rgb, not an index. @@ -6713,18 +8280,25 @@ image_transform_png_set_background_set(PNG_CONST image_transform *this, { colour_type = PNG_COLOR_TYPE_RGB; bit_depth = 8; + expand = 0; /* passing in an RGB not a pixel index */ } else + { + if (that->this.has_tRNS) + that->this.is_transparent = 1; + bit_depth = that->this.bit_depth; + expand = 1; + } image_pixel_init(&data, random_bytes, colour_type, - bit_depth, 0/*x*/, 0/*unused: palette*/); + bit_depth, 0/*x*/, 0/*unused: palette*/, NULL/*format*/); /* Extract the background colour from this image_pixel, but make sure the * unused fields of 'back' are garbage. */ - RANDOMIZE(back); + R8(back); if (colour_type & PNG_COLOR_MASK_COLOR) { @@ -6736,24 +8310,23 @@ image_transform_png_set_background_set(PNG_CONST image_transform *this, else back.gray = (png_uint_16)data.red; -# ifdef PNG_FLOATING_POINT_SUPPORTED - png_set_background(pp, &back, PNG_BACKGROUND_GAMMA_FILE, 1/*need expand*/, - 0); -# else - png_set_background_fixed(pp, &back, PNG_BACKGROUND_GAMMA_FILE, - 1/*need expand*/, 0); -# endif +#ifdef PNG_FLOATING_POINT_SUPPORTED + png_set_background(pp, &back, PNG_BACKGROUND_GAMMA_FILE, expand, 0); +#else + png_set_background_fixed(pp, &back, PNG_BACKGROUND_GAMMA_FILE, expand, 0); +#endif this->next->set(this->next, that, pp, pi); } static void -image_transform_png_set_background_mod(PNG_CONST image_transform *this, - image_pixel *that, png_structp pp, PNG_CONST transform_display *display) +image_transform_png_set_background_mod(const image_transform *this, + image_pixel *that, png_const_structp pp, + const transform_display *display) { /* Check for tRNS first: */ if (that->have_tRNS && that->colour_type != PNG_COLOR_TYPE_PALETTE) - image_pixel_add_alpha(that, &display->this); + image_pixel_add_alpha(that, &display->this, 1/*for background*/); /* This is only necessary if the alpha value is less than 1. */ if (that->alphaf < 1) @@ -6792,14 +8365,14 @@ image_transform_png_set_background_mod(PNG_CONST image_transform *this, /* Remove the alpha type and set the alpha (not in that order.) */ that->alphaf = 1; that->alphae = 0; - - if (that->colour_type == PNG_COLOR_TYPE_RGB_ALPHA) - that->colour_type = PNG_COLOR_TYPE_RGB; - else if (that->colour_type == PNG_COLOR_TYPE_GRAY_ALPHA) - that->colour_type = PNG_COLOR_TYPE_GRAY; - /* PNG_COLOR_TYPE_PALETTE is not changed */ } + if (that->colour_type == PNG_COLOR_TYPE_RGB_ALPHA) + that->colour_type = PNG_COLOR_TYPE_RGB; + else if (that->colour_type == PNG_COLOR_TYPE_GRAY_ALPHA) + that->colour_type = PNG_COLOR_TYPE_GRAY; + /* PNG_COLOR_TYPE_PALETTE is not changed */ + this->next->mod(this->next, that, pp, display); } @@ -6811,11 +8384,604 @@ IT(background); #define PT ITSTRUCT(background) #endif /* PNG_READ_BACKGROUND_SUPPORTED */ -/* This may just be 'end' if all the transforms are disabled! */ -static image_transform *PNG_CONST image_transform_first = &PT; +/* png_set_quantize(png_structp, png_colorp palette, int num_palette, + * int maximum_colors, png_const_uint_16p histogram, int full_quantize) + * + * Very difficult to validate this! + */ +/*NOTE: TBD NYI */ + +/* The data layout transforms are handled by swapping our own channel data, + * necessarily these need to happen at the end of the transform list because the + * semantic of the channels changes after these are executed. Some of these, + * like set_shift and set_packing, can't be done at present because they change + * the layout of the data at the sub-sample level so sample() won't get the + * right answer. + */ +/* png_set_invert_alpha */ +#ifdef PNG_READ_INVERT_ALPHA_SUPPORTED +/* Invert the alpha channel + * + * png_set_invert_alpha(png_structrp png_ptr) + */ +static void +image_transform_png_set_invert_alpha_set(const image_transform *this, + transform_display *that, png_structp pp, png_infop pi) +{ + png_set_invert_alpha(pp); + this->next->set(this->next, that, pp, pi); +} static void -transform_enable(PNG_CONST char *name) +image_transform_png_set_invert_alpha_mod(const image_transform *this, + image_pixel *that, png_const_structp pp, + const transform_display *display) +{ + if (that->colour_type & 4) + that->alpha_inverted = 1; + + this->next->mod(this->next, that, pp, display); +} + +static int +image_transform_png_set_invert_alpha_add(image_transform *this, + const image_transform **that, png_byte colour_type, png_byte bit_depth) +{ + UNUSED(bit_depth) + + this->next = *that; + *that = this; + + /* Only has an effect on pixels with alpha: */ + return (colour_type & 4) != 0; +} + +IT(invert_alpha); +#undef PT +#define PT ITSTRUCT(invert_alpha) + +#endif /* PNG_READ_INVERT_ALPHA_SUPPORTED */ + +/* png_set_bgr */ +#ifdef PNG_READ_BGR_SUPPORTED +/* Swap R,G,B channels to order B,G,R. + * + * png_set_bgr(png_structrp png_ptr) + * + * This only has an effect on RGB and RGBA pixels. + */ +static void +image_transform_png_set_bgr_set(const image_transform *this, + transform_display *that, png_structp pp, png_infop pi) +{ + png_set_bgr(pp); + this->next->set(this->next, that, pp, pi); +} + +static void +image_transform_png_set_bgr_mod(const image_transform *this, + image_pixel *that, png_const_structp pp, + const transform_display *display) +{ + if (that->colour_type == PNG_COLOR_TYPE_RGB || + that->colour_type == PNG_COLOR_TYPE_RGBA) + that->swap_rgb = 1; + + this->next->mod(this->next, that, pp, display); +} + +static int +image_transform_png_set_bgr_add(image_transform *this, + const image_transform **that, png_byte colour_type, png_byte bit_depth) +{ + UNUSED(bit_depth) + + this->next = *that; + *that = this; + + return colour_type == PNG_COLOR_TYPE_RGB || + colour_type == PNG_COLOR_TYPE_RGBA; +} + +IT(bgr); +#undef PT +#define PT ITSTRUCT(bgr) + +#endif /* PNG_READ_BGR_SUPPORTED */ + +/* png_set_swap_alpha */ +#ifdef PNG_READ_SWAP_ALPHA_SUPPORTED +/* Put the alpha channel first. + * + * png_set_swap_alpha(png_structrp png_ptr) + * + * This only has an effect on GA and RGBA pixels. + */ +static void +image_transform_png_set_swap_alpha_set(const image_transform *this, + transform_display *that, png_structp pp, png_infop pi) +{ + png_set_swap_alpha(pp); + this->next->set(this->next, that, pp, pi); +} + +static void +image_transform_png_set_swap_alpha_mod(const image_transform *this, + image_pixel *that, png_const_structp pp, + const transform_display *display) +{ + if (that->colour_type == PNG_COLOR_TYPE_GA || + that->colour_type == PNG_COLOR_TYPE_RGBA) + that->alpha_first = 1; + + this->next->mod(this->next, that, pp, display); +} + +static int +image_transform_png_set_swap_alpha_add(image_transform *this, + const image_transform **that, png_byte colour_type, png_byte bit_depth) +{ + UNUSED(bit_depth) + + this->next = *that; + *that = this; + + return colour_type == PNG_COLOR_TYPE_GA || + colour_type == PNG_COLOR_TYPE_RGBA; +} + +IT(swap_alpha); +#undef PT +#define PT ITSTRUCT(swap_alpha) + +#endif /* PNG_READ_SWAP_ALPHA_SUPPORTED */ + +/* png_set_swap */ +#ifdef PNG_READ_SWAP_SUPPORTED +/* Byte swap 16-bit components. + * + * png_set_swap(png_structrp png_ptr) + */ +static void +image_transform_png_set_swap_set(const image_transform *this, + transform_display *that, png_structp pp, png_infop pi) +{ + png_set_swap(pp); + this->next->set(this->next, that, pp, pi); +} + +static void +image_transform_png_set_swap_mod(const image_transform *this, + image_pixel *that, png_const_structp pp, + const transform_display *display) +{ + if (that->bit_depth == 16) + that->swap16 = 1; + + this->next->mod(this->next, that, pp, display); +} + +static int +image_transform_png_set_swap_add(image_transform *this, + const image_transform **that, png_byte colour_type, png_byte bit_depth) +{ + UNUSED(colour_type) + + this->next = *that; + *that = this; + + return bit_depth == 16; +} + +IT(swap); +#undef PT +#define PT ITSTRUCT(swap) + +#endif /* PNG_READ_SWAP_SUPPORTED */ + +#ifdef PNG_READ_FILLER_SUPPORTED +/* Add a filler byte to 8-bit Gray or 24-bit RGB images. + * + * png_set_filler, (png_structp png_ptr, png_uint_32 filler, int flags)); + * + * Flags: + * + * PNG_FILLER_BEFORE + * PNG_FILLER_AFTER + */ +#define data ITDATA(filler) +static struct +{ + png_uint_32 filler; + int flags; +} data; + +static void +image_transform_png_set_filler_set(const image_transform *this, + transform_display *that, png_structp pp, png_infop pi) +{ + /* Need a random choice for 'before' and 'after' as well as for the + * filler. The 'filler' value has all 32 bits set, but only bit_depth + * will be used. At this point we don't know bit_depth. + */ + data.filler = random_u32(); + data.flags = random_choice(); + + png_set_filler(pp, data.filler, data.flags); + + /* The standard display handling stuff also needs to know that + * there is a filler, so set that here. + */ + that->this.filler = 1; + + this->next->set(this->next, that, pp, pi); +} + +static void +image_transform_png_set_filler_mod(const image_transform *this, + image_pixel *that, png_const_structp pp, + const transform_display *display) +{ + if (that->bit_depth >= 8 && + (that->colour_type == PNG_COLOR_TYPE_RGB || + that->colour_type == PNG_COLOR_TYPE_GRAY)) + { + unsigned int max = (1U << that->bit_depth)-1; + that->alpha = data.filler & max; + that->alphaf = ((double)that->alpha) / max; + that->alphae = 0; + + /* The filler has been stored in the alpha channel, we must record + * that this has been done for the checking later on, the color + * type is faked to have an alpha channel, but libpng won't report + * this; the app has to know the extra channel is there and this + * was recording in standard_display::filler above. + */ + that->colour_type |= 4; /* alpha added */ + that->alpha_first = data.flags == PNG_FILLER_BEFORE; + } + + this->next->mod(this->next, that, pp, display); +} + +static int +image_transform_png_set_filler_add(image_transform *this, + const image_transform **that, png_byte colour_type, png_byte bit_depth) +{ + this->next = *that; + *that = this; + + return bit_depth >= 8 && (colour_type == PNG_COLOR_TYPE_RGB || + colour_type == PNG_COLOR_TYPE_GRAY); +} + +#undef data +IT(filler); +#undef PT +#define PT ITSTRUCT(filler) + +/* png_set_add_alpha, (png_structp png_ptr, png_uint_32 filler, int flags)); */ +/* Add an alpha byte to 8-bit Gray or 24-bit RGB images. */ +#define data ITDATA(add_alpha) +static struct +{ + png_uint_32 filler; + int flags; +} data; + +static void +image_transform_png_set_add_alpha_set(const image_transform *this, + transform_display *that, png_structp pp, png_infop pi) +{ + /* Need a random choice for 'before' and 'after' as well as for the + * filler. The 'filler' value has all 32 bits set, but only bit_depth + * will be used. At this point we don't know bit_depth. + */ + data.filler = random_u32(); + data.flags = random_choice(); + + png_set_add_alpha(pp, data.filler, data.flags); + this->next->set(this->next, that, pp, pi); +} + +static void +image_transform_png_set_add_alpha_mod(const image_transform *this, + image_pixel *that, png_const_structp pp, + const transform_display *display) +{ + if (that->bit_depth >= 8 && + (that->colour_type == PNG_COLOR_TYPE_RGB || + that->colour_type == PNG_COLOR_TYPE_GRAY)) + { + unsigned int max = (1U << that->bit_depth)-1; + that->alpha = data.filler & max; + that->alphaf = ((double)that->alpha) / max; + that->alphae = 0; + + that->colour_type |= 4; /* alpha added */ + that->alpha_first = data.flags == PNG_FILLER_BEFORE; + } + + this->next->mod(this->next, that, pp, display); +} + +static int +image_transform_png_set_add_alpha_add(image_transform *this, + const image_transform **that, png_byte colour_type, png_byte bit_depth) +{ + this->next = *that; + *that = this; + + return bit_depth >= 8 && (colour_type == PNG_COLOR_TYPE_RGB || + colour_type == PNG_COLOR_TYPE_GRAY); +} + +#undef data +IT(add_alpha); +#undef PT +#define PT ITSTRUCT(add_alpha) + +#endif /* PNG_READ_FILLER_SUPPORTED */ + +/* png_set_packing */ +#ifdef PNG_READ_PACK_SUPPORTED +/* Use 1 byte per pixel in 1, 2, or 4-bit depth files. + * + * png_set_packing(png_structrp png_ptr) + * + * This should only affect grayscale and palette images with less than 8 bits + * per pixel. + */ +static void +image_transform_png_set_packing_set(const image_transform *this, + transform_display *that, png_structp pp, png_infop pi) +{ + png_set_packing(pp); + that->unpacked = 1; + this->next->set(this->next, that, pp, pi); +} + +static void +image_transform_png_set_packing_mod(const image_transform *this, + image_pixel *that, png_const_structp pp, + const transform_display *display) +{ + /* The general expand case depends on what the colour type is, + * low bit-depth pixel values are unpacked into bytes without + * scaling, so sample_depth is not changed. + */ + if (that->bit_depth < 8) /* grayscale or palette */ + that->bit_depth = 8; + + this->next->mod(this->next, that, pp, display); +} + +static int +image_transform_png_set_packing_add(image_transform *this, + const image_transform **that, png_byte colour_type, png_byte bit_depth) +{ + UNUSED(colour_type) + + this->next = *that; + *that = this; + + /* Nothing should happen unless the bit depth is less than 8: */ + return bit_depth < 8; +} + +IT(packing); +#undef PT +#define PT ITSTRUCT(packing) + +#endif /* PNG_READ_PACK_SUPPORTED */ + +/* png_set_packswap */ +#ifdef PNG_READ_PACKSWAP_SUPPORTED +/* Swap pixels packed into bytes; reverses the order on screen so that + * the high order bits correspond to the rightmost pixels. + * + * png_set_packswap(png_structrp png_ptr) + */ +static void +image_transform_png_set_packswap_set(const image_transform *this, + transform_display *that, png_structp pp, png_infop pi) +{ + png_set_packswap(pp); + that->this.littleendian = 1; + this->next->set(this->next, that, pp, pi); +} + +static void +image_transform_png_set_packswap_mod(const image_transform *this, + image_pixel *that, png_const_structp pp, + const transform_display *display) +{ + if (that->bit_depth < 8) + that->littleendian = 1; + + this->next->mod(this->next, that, pp, display); +} + +static int +image_transform_png_set_packswap_add(image_transform *this, + const image_transform **that, png_byte colour_type, png_byte bit_depth) +{ + UNUSED(colour_type) + + this->next = *that; + *that = this; + + return bit_depth < 8; +} + +IT(packswap); +#undef PT +#define PT ITSTRUCT(packswap) + +#endif /* PNG_READ_PACKSWAP_SUPPORTED */ + + +/* png_set_invert_mono */ +#ifdef PNG_READ_INVERT_MONO_SUPPORTED +/* Invert the gray channel + * + * png_set_invert_mono(png_structrp png_ptr) + */ +static void +image_transform_png_set_invert_mono_set(const image_transform *this, + transform_display *that, png_structp pp, png_infop pi) +{ + png_set_invert_mono(pp); + this->next->set(this->next, that, pp, pi); +} + +static void +image_transform_png_set_invert_mono_mod(const image_transform *this, + image_pixel *that, png_const_structp pp, + const transform_display *display) +{ + if (that->colour_type & 4) + that->mono_inverted = 1; + + this->next->mod(this->next, that, pp, display); +} + +static int +image_transform_png_set_invert_mono_add(image_transform *this, + const image_transform **that, png_byte colour_type, png_byte bit_depth) +{ + UNUSED(bit_depth) + + this->next = *that; + *that = this; + + /* Only has an effect on pixels with no colour: */ + return (colour_type & 2) == 0; +} + +IT(invert_mono); +#undef PT +#define PT ITSTRUCT(invert_mono) + +#endif /* PNG_READ_INVERT_MONO_SUPPORTED */ + +#ifdef PNG_READ_SHIFT_SUPPORTED +/* png_set_shift(png_structp, png_const_color_8p true_bits) + * + * The output pixels will be shifted by the given true_bits + * values. + */ +#define data ITDATA(shift) +static png_color_8 data; + +static void +image_transform_png_set_shift_set(const image_transform *this, + transform_display *that, png_structp pp, png_infop pi) +{ + /* Get a random set of shifts. The shifts need to do something + * to test the transform, so they are limited to the bit depth + * of the input image. Notice that in the following the 'gray' + * field is randomized independently. This acts as a check that + * libpng does use the correct field. + */ + unsigned int depth = that->this.bit_depth; + + data.red = (png_byte)/*SAFE*/(random_mod(depth)+1); + data.green = (png_byte)/*SAFE*/(random_mod(depth)+1); + data.blue = (png_byte)/*SAFE*/(random_mod(depth)+1); + data.gray = (png_byte)/*SAFE*/(random_mod(depth)+1); + data.alpha = (png_byte)/*SAFE*/(random_mod(depth)+1); + + png_set_shift(pp, &data); + this->next->set(this->next, that, pp, pi); +} + +static void +image_transform_png_set_shift_mod(const image_transform *this, + image_pixel *that, png_const_structp pp, + const transform_display *display) +{ + /* Copy the correct values into the sBIT fields, libpng does not do + * anything to palette data: + */ + if (that->colour_type != PNG_COLOR_TYPE_PALETTE) + { + that->sig_bits = 1; + + /* The sBIT fields are reset to the values previously sent to + * png_set_shift according to the colour type. + * does. + */ + if (that->colour_type & 2) /* RGB channels */ + { + that->red_sBIT = data.red; + that->green_sBIT = data.green; + that->blue_sBIT = data.blue; + } + + else /* One grey channel */ + that->red_sBIT = that->green_sBIT = that->blue_sBIT = data.gray; + + that->alpha_sBIT = data.alpha; + } + + this->next->mod(this->next, that, pp, display); +} + +static int +image_transform_png_set_shift_add(image_transform *this, + const image_transform **that, png_byte colour_type, png_byte bit_depth) +{ + UNUSED(bit_depth) + + this->next = *that; + *that = this; + + return colour_type != PNG_COLOR_TYPE_PALETTE; +} + +IT(shift); +#undef PT +#define PT ITSTRUCT(shift) + +#endif /* PNG_READ_SHIFT_SUPPORTED */ + +#ifdef THIS_IS_THE_PROFORMA +static void +image_transform_png_set_@_set(const image_transform *this, + transform_display *that, png_structp pp, png_infop pi) +{ + png_set_@(pp); + this->next->set(this->next, that, pp, pi); +} + +static void +image_transform_png_set_@_mod(const image_transform *this, + image_pixel *that, png_const_structp pp, + const transform_display *display) +{ + this->next->mod(this->next, that, pp, display); +} + +static int +image_transform_png_set_@_add(image_transform *this, + const image_transform **that, png_byte colour_type, png_byte bit_depth) +{ + this->next = *that; + *that = this; + + return 1; +} + +IT(@); +#endif + + +/* This may just be 'end' if all the transforms are disabled! */ +static image_transform *const image_transform_first = &PT; + +static void +transform_enable(const char *name) { /* Everything starts out enabled, so if we see an 'enable' disabled * everything else the first time round. @@ -6843,12 +9009,12 @@ transform_enable(PNG_CONST char *name) { fprintf(stderr, "pngvalid: --transform-enable=%s: unknown transform\n", name); - exit(1); + exit(99); } } static void -transform_disable(PNG_CONST char *name) +transform_disable(const char *name) { image_transform *list = image_transform_first; @@ -6865,7 +9031,7 @@ transform_disable(PNG_CONST char *name) fprintf(stderr, "pngvalid: --transform-disable=%s: unknown transform\n", name); - exit(1); + exit(99); } static void @@ -6911,7 +9077,7 @@ image_transform_test_counter(png_uint_32 counter, unsigned int max) } static png_uint_32 -image_transform_add(PNG_CONST image_transform **this, unsigned int max, +image_transform_add(const image_transform **this, unsigned int max, png_uint_32 counter, char *name, size_t sizeof_name, size_t *pos, png_byte colour_type, png_byte bit_depth) { @@ -6988,90 +9154,15 @@ image_transform_add(PNG_CONST image_transform **this, unsigned int max, } } -#ifdef THIS_IS_THE_PROFORMA -static void -image_transform_png_set_@_set(PNG_CONST image_transform *this, - transform_display *that, png_structp pp, png_infop pi) -{ - png_set_@(pp); - this->next->set(this->next, that, pp, pi); -} - -static void -image_transform_png_set_@_mod(PNG_CONST image_transform *this, - image_pixel *that, png_structp pp, PNG_CONST transform_display *display) -{ - this->next->mod(this->next, that, pp, display); -} - -static int -image_transform_png_set_@_add(image_transform *this, - PNG_CONST image_transform **that, char *name, size_t sizeof_name, - size_t *pos, png_byte colour_type, png_byte bit_depth) -{ - this->next = *that; - *that = this; - - *pos = safecat(name, sizeof_name, *pos, " +@"); - - return 1; -} - -IT(@); -#endif - -/* png_set_quantize(png_structp, png_colorp palette, int num_palette, - * int maximum_colors, png_const_uint_16p histogram, int full_quantize) - * - * Very difficult to validate this! - */ -/*NOTE: TBD NYI */ - -/* The data layout transforms are handled by swapping our own channel data, - * necessarily these need to happen at the end of the transform list because the - * semantic of the channels changes after these are executed. Some of these, - * like set_shift and set_packing, can't be done at present because they change - * the layout of the data at the sub-sample level so sample() won't get the - * right answer. - */ -/* png_set_invert_alpha */ -/*NOTE: TBD NYI */ - -/* png_set_bgr */ -/*NOTE: TBD NYI */ - -/* png_set_swap_alpha */ -/*NOTE: TBD NYI */ - -/* png_set_swap */ -/*NOTE: TBD NYI */ - -/* png_set_filler, (png_structp png_ptr, png_uint_32 filler, int flags)); */ -/*NOTE: TBD NYI */ - -/* png_set_add_alpha, (png_structp png_ptr, png_uint_32 filler, int flags)); */ -/*NOTE: TBD NYI */ - -/* png_set_packing */ -/*NOTE: TBD NYI */ - -/* png_set_packswap */ -/*NOTE: TBD NYI */ - -/* png_set_invert_mono */ -/*NOTE: TBD NYI */ - -/* png_set_shift(png_structp, png_const_color_8p true_bits) */ -/*NOTE: TBD NYI */ - static void perform_transform_test(png_modifier *pm) { png_byte colour_type = 0; png_byte bit_depth = 0; - int palette_number = 0; + unsigned int palette_number = 0; - while (next_format(&colour_type, &bit_depth, &palette_number)) + while (next_format(&colour_type, &bit_depth, &palette_number, pm->test_lbg, + pm->test_tRNS)) { png_uint_32 counter = 0; size_t base_pos; @@ -7082,7 +9173,7 @@ perform_transform_test(png_modifier *pm) for (;;) { size_t pos = base_pos; - PNG_CONST image_transform *list = 0; + const image_transform *list = 0; /* 'max' is currently hardwired to '1'; this should be settable on the * command line. @@ -7143,11 +9234,11 @@ static void gamma_display_init(gamma_display *dp, png_modifier *pm, png_uint_32 id, double file_gamma, double screen_gamma, png_byte sbit, int threshold_test, int use_input_precision, int scale16, int expand16, - int do_background, PNG_CONST png_color_16 *pointer_to_the_background_color, + int do_background, const png_color_16 *pointer_to_the_background_color, double background_gamma) { /* Standard fields */ - standard_display_init(&dp->this, &pm->this, id, 0/*do_interlace*/, + standard_display_init(&dp->this, &pm->this, id, do_read_interlace, pm->use_update_info); /* Parameter fields */ @@ -7179,7 +9270,7 @@ gamma_info_imp(gamma_display *dp, png_structp pp, png_infop pi) /* If requested strip 16 to 8 bits - this is handled automagically below * because the output bit depth is read from the library. Note that there * are interactions with sBIT but, internally, libpng makes sbit at most - * PNG_MAX_GAMMA_8 when doing the following. + * PNG_MAX_GAMMA_8 prior to 1.7 when doing the following. */ if (dp->scale16) # ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED @@ -7208,12 +9299,12 @@ gamma_info_imp(gamma_display *dp, png_structp pp, png_infop pi) int mode = dp->do_background - ALPHA_MODE_OFFSET; /* The gamma value is the output gamma, and is in the standard, - * non-inverted, represenation. It provides a default for the PNG file + * non-inverted, representation. It provides a default for the PNG file * gamma, but since the file has a gAMA chunk this does not matter. */ - PNG_CONST double sg = dp->screen_gamma; + const double sg = dp->screen_gamma; # ifndef PNG_FLOATING_POINT_SUPPORTED - PNG_CONST png_fixed_point g = fix(sg); + png_fixed_point g = fix(sg); # endif # ifdef PNG_FLOATING_POINT_SUPPORTED @@ -7259,9 +9350,9 @@ gamma_info_imp(gamma_display *dp, png_structp pp, png_infop pi) # ifdef PNG_READ_BACKGROUND_SUPPORTED /* NOTE: this assumes the caller provided the correct background gamma! */ - PNG_CONST double bg = dp->background_gamma; + const double bg = dp->background_gamma; # ifndef PNG_FLOATING_POINT_SUPPORTED - PNG_CONST png_fixed_point g = fix(bg); + png_fixed_point g = fix(bg); # endif # ifdef PNG_FLOATING_POINT_SUPPORTED @@ -7289,7 +9380,7 @@ gamma_info_imp(gamma_display *dp, png_structp pp, png_infop pi) standard_info_part2(&dp->this, pp, pi, 1 /*images*/); } -static void +static void PNGCBAPI gamma_info(png_structp pp, png_infop pi) { gamma_info_imp(voidcast(gamma_display*, png_get_progressive_ptr(pp)), pp, @@ -7302,7 +9393,7 @@ gamma_info(png_structp pp, png_infop pi) */ typedef struct validate_info { - png_structp pp; + png_const_structp pp; gamma_display *dp; png_byte sbit; int use_input_precision; @@ -7332,10 +9423,10 @@ typedef struct validate_info validate_info; static void -init_validate_info(validate_info *vi, gamma_display *dp, png_struct *pp, +init_validate_info(validate_info *vi, gamma_display *dp, png_const_structp pp, int in_depth, int out_depth) { - PNG_CONST unsigned int outmax = (1U<pp = pp; vi->dp = dp; @@ -7374,13 +9465,15 @@ init_validate_info(validate_info *vi, gamma_display *dp, png_struct *pp, vi->outlog = outlog(dp->pm, in_depth, out_depth); if ((dp->this.colour_type & PNG_COLOR_MASK_ALPHA) != 0 || - (dp->this.colour_type == 3 && dp->this.is_transparent)) + (dp->this.colour_type == 3 && dp->this.is_transparent) || + ((dp->this.colour_type == 0 || dp->this.colour_type == 2) && + dp->this.has_tRNS)) { vi->do_background = dp->do_background; if (vi->do_background != 0) { - PNG_CONST double bg_inverse = 1/dp->background_gamma; + const double bg_inverse = 1/dp->background_gamma; double r, g, b; /* Caller must at least put the gray value into the red channel */ @@ -7404,7 +9497,7 @@ init_validate_info(validate_info *vi, gamma_display *dp, png_struct *pp, vi->background_blue = b; } } - else + else /* Do not expect any background processing */ vi->do_background = 0; if (vi->do_background == 0) @@ -7432,6 +9525,7 @@ gamma_component_compose(int do_background, double input_sample, double alpha, { switch (do_background) { +#ifdef PNG_READ_BACKGROUND_SUPPORTED case PNG_BACKGROUND_GAMMA_SCREEN: case PNG_BACKGROUND_GAMMA_FILE: case PNG_BACKGROUND_GAMMA_UNIQUE: @@ -7449,6 +9543,7 @@ gamma_component_compose(int do_background, double input_sample, double alpha, input_sample = background; } break; +#endif #ifdef PNG_READ_ALPHA_MODE_SUPPORTED case ALPHA_MODE_OFFSET + PNG_ALPHA_STANDARD: @@ -7481,6 +9576,9 @@ gamma_component_compose(int do_background, double input_sample, double alpha, /* Standard cases where no compositing is done (so the component * value is already correct.) */ + UNUSED(alpha) + UNUSED(background) + UNUSED(compose) break; } @@ -7489,15 +9587,15 @@ gamma_component_compose(int do_background, double input_sample, double alpha, /* This API returns the encoded *input* component, in the range 0..1 */ static double -gamma_component_validate(PNG_CONST char *name, PNG_CONST validate_info *vi, - PNG_CONST unsigned int id, PNG_CONST unsigned int od, - PNG_CONST double alpha /* <0 for the alpha channel itself */, - PNG_CONST double background /* component background value */) +gamma_component_validate(const char *name, const validate_info *vi, + unsigned int id, unsigned int od, + const double alpha /* <0 for the alpha channel itself */, + const double background /* component background value */) { - PNG_CONST unsigned int isbit = id >> vi->isbit_shift; - PNG_CONST unsigned int sbit_max = vi->sbit_max; - PNG_CONST unsigned int outmax = vi->outmax; - PNG_CONST int do_background = vi->do_background; + unsigned int isbit = id >> vi->isbit_shift; + unsigned int sbit_max = vi->sbit_max; + unsigned int outmax = vi->outmax; + int do_background = vi->do_background; double i; @@ -7648,7 +9746,7 @@ gamma_component_validate(PNG_CONST char *name, PNG_CONST validate_info *vi, * * pngvalid calculations: * input_sample: linear result; i linearized and composed, range 0..1 - * encoded_sample: encoded result; input_sample scaled to ouput bit depth + * encoded_sample: encoded result; input_sample scaled to output bit depth * * libpng calculations: * output: linear result; od scaled to 0..1 and linearized @@ -7751,14 +9849,25 @@ gamma_component_validate(PNG_CONST char *name, PNG_CONST validate_info *vi, * passed. Don't do these additional tests here - just log the * original [es_lo..es_hi] values. */ - if (pass == 0 && vi->use_input_precision) + if (pass == 0 && vi->use_input_precision && vi->dp->sbit) { /* Ok, something is wrong - this actually happens in current libpng * 16-to-8 processing. Assume that the input value (id, adjusted * for sbit) can be anywhere between value-.5 and value+.5 - quite a * large range if sbit is low. + * + * NOTE: at present because the libpng gamma table stuff has been + * changed to use a rounding algorithm to correct errors in 8-bit + * calculations the precise sbit calculation (a shift) has been + * lost. This can result in up to a +/-1 error in the presence of + * an sbit less than the bit depth. */ - double tmp = (isbit - .5)/sbit_max; +# if PNG_LIBPNG_VER < 10700 +# define SBIT_ERROR .5 +# else +# define SBIT_ERROR 1. +# endif + double tmp = (isbit - SBIT_ERROR)/sbit_max; if (tmp <= 0) tmp = 0; @@ -7777,10 +9886,10 @@ gamma_component_validate(PNG_CONST char *name, PNG_CONST validate_info *vi, if (is_lo < 0) is_lo = 0; - tmp = (isbit + .5)/sbit_max; + tmp = (isbit + SBIT_ERROR)/sbit_max; - if (tmp <= 0) - tmp = 0; + if (tmp >= 1) + tmp = 1; else if (alpha >= 0 && vi->file_inverse > 0 && tmp < 1) tmp = pow(tmp, vi->file_inverse); @@ -7880,12 +9989,14 @@ gamma_component_validate(PNG_CONST char *name, PNG_CONST validate_info *vi, */ switch (do_background) { - case PNG_BACKGROUND_GAMMA_SCREEN: - case PNG_BACKGROUND_GAMMA_FILE: - case PNG_BACKGROUND_GAMMA_UNIQUE: - use_background = (alpha >= 0 && alpha < 1); - /*FALL THROUGH*/ +# ifdef PNG_READ_BACKGROUND_SUPPORTED + case PNG_BACKGROUND_GAMMA_SCREEN: + case PNG_BACKGROUND_GAMMA_FILE: + case PNG_BACKGROUND_GAMMA_UNIQUE: + use_background = (alpha >= 0 && alpha < 1); +# endif # ifdef PNG_READ_ALPHA_MODE_SUPPORTED + /* FALLTHROUGH */ case ALPHA_MODE_OFFSET + PNG_ALPHA_STANDARD: case ALPHA_MODE_OFFSET + PNG_ALPHA_BROKEN: case ALPHA_MODE_OFFSET + PNG_ALPHA_OPTIMIZED: @@ -8045,17 +10156,18 @@ gamma_component_validate(PNG_CONST char *name, PNG_CONST validate_info *vi, } static void -gamma_image_validate(gamma_display *dp, png_structp pp, png_infop pi) +gamma_image_validate(gamma_display *dp, png_const_structp pp, + png_infop pi) { /* Get some constants derived from the input and output file formats: */ - PNG_CONST png_store* PNG_CONST ps = dp->this.ps; - PNG_CONST png_byte in_ct = dp->this.colour_type; - PNG_CONST png_byte in_bd = dp->this.bit_depth; - PNG_CONST png_uint_32 w = dp->this.w; - PNG_CONST png_uint_32 h = dp->this.h; - PNG_CONST size_t cbRow = dp->this.cbRow; - PNG_CONST png_byte out_ct = png_get_color_type(pp, pi); - PNG_CONST png_byte out_bd = png_get_bit_depth(pp, pi); + const png_store* const ps = dp->this.ps; + png_byte in_ct = dp->this.colour_type; + png_byte in_bd = dp->this.bit_depth; + png_uint_32 w = dp->this.w; + png_uint_32 h = dp->this.h; + const size_t cbRow = dp->this.cbRow; + png_byte out_ct = png_get_color_type(pp, pi); + png_byte out_bd = png_get_bit_depth(pp, pi); /* There are three sources of error, firstly the quantization in the * file encoding, determined by sbit and/or the file depth, secondly @@ -8071,10 +10183,10 @@ gamma_image_validate(gamma_display *dp, png_structp pp, png_infop pi) * Since the library must quantize the output to 8 or 16 bits there is * a fundamental limit on the accuracy of the output of +/-.5 - this * quantization limit is included in addition to the other limits - * specified by the paramaters to the API. (Effectively, add .5 + * specified by the parameters to the API. (Effectively, add .5 * everywhere.) * - * The behavior of the 'sbit' paramter is defined by section 12.5 + * The behavior of the 'sbit' parameter is defined by section 12.5 * (sample depth scaling) of the PNG spec. That section forces the * decoder to assume that the PNG values have been scaled if sBIT is * present: @@ -8094,13 +10206,14 @@ gamma_image_validate(gamma_display *dp, png_structp pp, png_infop pi) * Because there is limited precision in the input it is arguable that * an acceptable result is any valid result from input-.5 to input+.5. * The basic tests below do not do this, however if 'use_input_precision' - * is set a subsequent test is performed below. + * is set a subsequent test is performed above. */ - PNG_CONST unsigned int samples_per_pixel = (out_ct & 2U) ? 3U : 1U; + unsigned int samples_per_pixel = (out_ct & 2U) ? 3U : 1U; int processing; png_uint_32 y; - PNG_CONST store_palette_entry *in_palette = dp->this.palette; - PNG_CONST int in_is_transparent = dp->this.is_transparent; + const store_palette_entry *in_palette = dp->this.palette; + int in_is_transparent = dp->this.is_transparent; + int process_tRNS; int out_npalette = -1; int out_is_transparent = 0; /* Just refers to the palette case */ store_palette out_palette; @@ -8116,6 +10229,7 @@ gamma_image_validate(gamma_display *dp, png_structp pp, png_infop pi) processing = (vi.gamma_correction > 0 && !dp->threshold_test) || in_bd != out_bd || in_ct != out_ct || vi.do_background; + process_tRNS = dp->this.has_tRNS && vi.do_background; /* TODO: FIX THIS: MAJOR BUG! If the transformations all happen inside * the palette there is no way of finding out, because libpng fails to @@ -8146,20 +10260,20 @@ gamma_image_validate(gamma_display *dp, png_structp pp, png_infop pi) double alpha = 1; /* serves as a flag value */ /* Record the palette index for index images. */ - PNG_CONST unsigned int in_index = - in_ct == 3 ? sample(std, 3, in_bd, x, 0) : 256; - PNG_CONST unsigned int out_index = - out_ct == 3 ? sample(std, 3, out_bd, x, 0) : 256; + unsigned int in_index = + in_ct == 3 ? sample(std, 3, in_bd, x, 0, 0, 0) : 256; + unsigned int out_index = + out_ct == 3 ? sample(std, 3, out_bd, x, 0, 0, 0) : 256; /* Handle input alpha - png_set_background will cause the output * alpha to disappear so there is nothing to check. */ - if ((in_ct & PNG_COLOR_MASK_ALPHA) != 0 || (in_ct == 3 && - in_is_transparent)) + if ((in_ct & PNG_COLOR_MASK_ALPHA) != 0 || + (in_ct == 3 && in_is_transparent)) { - PNG_CONST unsigned int input_alpha = in_ct == 3 ? + unsigned int input_alpha = in_ct == 3 ? dp->this.palette[in_index].alpha : - sample(std, in_ct, in_bd, x, samples_per_pixel); + sample(std, in_ct, in_bd, x, samples_per_pixel, 0, 0); unsigned int output_alpha = 65536 /* as a flag value */; @@ -8171,7 +10285,7 @@ gamma_image_validate(gamma_display *dp, png_structp pp, png_infop pi) else if ((out_ct & PNG_COLOR_MASK_ALPHA) != 0) output_alpha = sample(pRow, out_ct, out_bd, x, - samples_per_pixel); + samples_per_pixel, 0, 0); if (output_alpha != 65536) alpha = gamma_component_validate("alpha", &vi, input_alpha, @@ -8187,33 +10301,62 @@ gamma_image_validate(gamma_display *dp, png_structp pp, png_infop pi) } } + else if (process_tRNS) + { + /* alpha needs to be set appropriately for this pixel, it is + * currently 1 and needs to be 0 for an input pixel which matches + * the values in tRNS. + */ + switch (in_ct) + { + case 0: /* gray */ + if (sample(std, in_ct, in_bd, x, 0, 0, 0) == + dp->this.transparent.red) + alpha = 0; + break; + + case 2: /* RGB */ + if (sample(std, in_ct, in_bd, x, 0, 0, 0) == + dp->this.transparent.red && + sample(std, in_ct, in_bd, x, 1, 0, 0) == + dp->this.transparent.green && + sample(std, in_ct, in_bd, x, 2, 0, 0) == + dp->this.transparent.blue) + alpha = 0; + break; + + default: + break; + } + } + /* Handle grayscale or RGB components. */ if ((in_ct & PNG_COLOR_MASK_COLOR) == 0) /* grayscale */ (void)gamma_component_validate("gray", &vi, - sample(std, in_ct, in_bd, x, 0), - sample(pRow, out_ct, out_bd, x, 0), alpha/*component*/, - vi.background_red); + sample(std, in_ct, in_bd, x, 0, 0, 0), + sample(pRow, out_ct, out_bd, x, 0, 0, 0), + alpha/*component*/, vi.background_red); else /* RGB or palette */ { (void)gamma_component_validate("red", &vi, in_ct == 3 ? in_palette[in_index].red : - sample(std, in_ct, in_bd, x, 0), + sample(std, in_ct, in_bd, x, 0, 0, 0), out_ct == 3 ? out_palette[out_index].red : - sample(pRow, out_ct, out_bd, x, 0), + sample(pRow, out_ct, out_bd, x, 0, 0, 0), alpha/*component*/, vi.background_red); (void)gamma_component_validate("green", &vi, in_ct == 3 ? in_palette[in_index].green : - sample(std, in_ct, in_bd, x, 1), + sample(std, in_ct, in_bd, x, 1, 0, 0), out_ct == 3 ? out_palette[out_index].green : - sample(pRow, out_ct, out_bd, x, 1), + sample(pRow, out_ct, out_bd, x, 1, 0, 0), alpha/*component*/, vi.background_green); (void)gamma_component_validate("blue", &vi, in_ct == 3 ? in_palette[in_index].blue : - sample(std, in_ct, in_bd, x, 2), + sample(std, in_ct, in_bd, x, 2, 0, 0), out_ct == 3 ? out_palette[out_index].blue : - sample(pRow, out_ct, out_bd, x, 2), + sample(pRow, out_ct, out_bd, x, 2, 0, 0), alpha/*component*/, vi.background_blue); } } @@ -8224,7 +10367,8 @@ gamma_image_validate(gamma_display *dp, png_structp pp, png_infop pi) char msg[64]; /* No transform is expected on the threshold tests. */ - sprintf(msg, "gamma: below threshold row %d changed", y); + sprintf(msg, "gamma: below threshold row %lu changed", + (unsigned long)y); png_error(pp, msg); } @@ -8233,9 +10377,10 @@ gamma_image_validate(gamma_display *dp, png_structp pp, png_infop pi) dp->this.ps->validated = 1; } -static void -gamma_end(png_structp pp, png_infop pi) +static void PNGCBAPI +gamma_end(png_structp ppIn, png_infop pi) { + png_const_structp pp = ppIn; gamma_display *dp = voidcast(gamma_display*, png_get_progressive_ptr(pp)); if (!dp->this.speed) @@ -8251,15 +10396,15 @@ gamma_end(png_structp pp, png_infop pi) * maxpc: maximum percentage error (as a percentage) */ static void -gamma_test(png_modifier *pmIn, PNG_CONST png_byte colour_typeIn, - PNG_CONST png_byte bit_depthIn, PNG_CONST int palette_numberIn, - PNG_CONST int interlace_typeIn, - PNG_CONST double file_gammaIn, PNG_CONST double screen_gammaIn, - PNG_CONST png_byte sbitIn, PNG_CONST int threshold_testIn, - PNG_CONST char *name, - PNG_CONST int use_input_precisionIn, PNG_CONST int scale16In, - PNG_CONST int expand16In, PNG_CONST int do_backgroundIn, - PNG_CONST png_color_16 *bkgd_colorIn, double bkgd_gammaIn) +gamma_test(png_modifier *pmIn, png_byte colour_typeIn, + png_byte bit_depthIn, int palette_numberIn, + int interlace_typeIn, + const double file_gammaIn, const double screen_gammaIn, + png_byte sbitIn, int threshold_testIn, + const char *name, + int use_input_precisionIn, int scale16In, + int expand16In, int do_backgroundIn, + const png_color_16 *bkgd_colorIn, double bkgd_gammaIn) { gamma_display d; context(&pmIn->this, fault); @@ -8294,7 +10439,7 @@ gamma_test(png_modifier *pmIn, PNG_CONST png_byte colour_typeIn, modification_reset(d.pm->modifications); - /* Get a png_struct for writing the image. */ + /* Get a png_struct for reading the image. */ pp = set_modifier_for_read(d.pm, &pi, d.this.id, name); standard_palette_init(&d.this); @@ -8402,7 +10547,7 @@ gamma_test(png_modifier *pmIn, PNG_CONST png_byte colour_typeIn, } Catch(fault) - modifier_reset((png_modifier*)fault); + modifier_reset(voidcast(png_modifier*,(void*)fault)); } static void gamma_threshold_test(png_modifier *pm, png_byte colour_type, @@ -8428,14 +10573,18 @@ perform_gamma_threshold_tests(png_modifier *pm) { png_byte colour_type = 0; png_byte bit_depth = 0; - int palette_number = 0; + unsigned int palette_number = 0; /* Don't test more than one instance of each palette - it's pointless, in * fact this test is somewhat excessive since libpng doesn't make this * decision based on colour type or bit depth! + * + * CHANGED: now test two palettes and, as a side effect, images with and + * without tRNS. */ - while (next_format(&colour_type, &bit_depth, &palette_number)) - if (palette_number == 0) + while (next_format(&colour_type, &bit_depth, &palette_number, + pm->test_lbg_gamma_threshold, pm->test_tRNS)) + if (palette_number < 2) { double test_gamma = 1.0; while (test_gamma >= .4) @@ -8458,11 +10607,11 @@ perform_gamma_threshold_tests(png_modifier *pm) } static void gamma_transform_test(png_modifier *pm, - PNG_CONST png_byte colour_type, PNG_CONST png_byte bit_depth, - PNG_CONST int palette_number, - PNG_CONST int interlace_type, PNG_CONST double file_gamma, - PNG_CONST double screen_gamma, PNG_CONST png_byte sbit, - PNG_CONST int use_input_precision, PNG_CONST int scale16) + png_byte colour_type, png_byte bit_depth, + int palette_number, + int interlace_type, const double file_gamma, + const double screen_gamma, png_byte sbit, + int use_input_precision, int scale16) { size_t pos = 0; char name[64]; @@ -8493,9 +10642,10 @@ static void perform_gamma_transform_tests(png_modifier *pm) { png_byte colour_type = 0; png_byte bit_depth = 0; - int palette_number = 0; + unsigned int palette_number = 0; - while (next_format(&colour_type, &bit_depth, &palette_number)) + while (next_format(&colour_type, &bit_depth, &palette_number, + pm->test_lbg_gamma_transform, pm->test_tRNS)) { unsigned int i, j; @@ -8522,13 +10672,11 @@ static void perform_gamma_sbit_tests(png_modifier *pm) */ for (sbit=pm->sbitlow; sbit<(1<test_lbg_gamma_sbit, pm->test_tRNS)) if ((colour_type & PNG_COLOR_MASK_ALPHA) == 0 && ((colour_type == 3 && sbit < 8) || (colour_type != 3 && sbit < bit_depth))) @@ -8562,6 +10710,11 @@ static void perform_gamma_scale16_tests(png_modifier *pm) { # ifndef PNG_MAX_GAMMA_8 # define PNG_MAX_GAMMA_8 11 +# endif +# if defined PNG_MAX_GAMMA_8 || PNG_LIBPNG_VER < 10700 +# define SBIT_16_TO_8 PNG_MAX_GAMMA_8 +# else +# define SBIT_16_TO_8 16 # endif /* Include the alpha cases here. Note that sbit matches the internal value * used by the library - otherwise we will get spurious errors from the @@ -8580,28 +10733,28 @@ static void perform_gamma_scale16_tests(png_modifier *pm) fabs(pm->gammas[j]/pm->gammas[i]-1) >= PNG_GAMMA_THRESHOLD) { gamma_transform_test(pm, 0, 16, 0, pm->interlace_type, - 1/pm->gammas[i], pm->gammas[j], PNG_MAX_GAMMA_8, + 1/pm->gammas[i], pm->gammas[j], SBIT_16_TO_8, pm->use_input_precision_16to8, 1 /*scale16*/); if (fail(pm)) return; gamma_transform_test(pm, 2, 16, 0, pm->interlace_type, - 1/pm->gammas[i], pm->gammas[j], PNG_MAX_GAMMA_8, + 1/pm->gammas[i], pm->gammas[j], SBIT_16_TO_8, pm->use_input_precision_16to8, 1 /*scale16*/); if (fail(pm)) return; gamma_transform_test(pm, 4, 16, 0, pm->interlace_type, - 1/pm->gammas[i], pm->gammas[j], PNG_MAX_GAMMA_8, + 1/pm->gammas[i], pm->gammas[j], SBIT_16_TO_8, pm->use_input_precision_16to8, 1 /*scale16*/); if (fail(pm)) return; gamma_transform_test(pm, 6, 16, 0, pm->interlace_type, - 1/pm->gammas[i], pm->gammas[j], PNG_MAX_GAMMA_8, + 1/pm->gammas[i], pm->gammas[j], SBIT_16_TO_8, pm->use_input_precision_16to8, 1 /*scale16*/); if (fail(pm)) @@ -8612,15 +10765,15 @@ static void perform_gamma_scale16_tests(png_modifier *pm) } #endif /* 16 to 8 bit conversion */ -#if defined PNG_READ_BACKGROUND_SUPPORTED ||\ - defined PNG_READ_ALPHA_MODE_SUPPORTED +#if defined(PNG_READ_BACKGROUND_SUPPORTED) ||\ + defined(PNG_READ_ALPHA_MODE_SUPPORTED) static void gamma_composition_test(png_modifier *pm, - PNG_CONST png_byte colour_type, PNG_CONST png_byte bit_depth, - PNG_CONST int palette_number, - PNG_CONST int interlace_type, PNG_CONST double file_gamma, - PNG_CONST double screen_gamma, - PNG_CONST int use_input_precision, PNG_CONST int do_background, - PNG_CONST int expand_16) + png_byte colour_type, png_byte bit_depth, + int palette_number, + int interlace_type, const double file_gamma, + const double screen_gamma, + int use_input_precision, int do_background, + int expand_16) { size_t pos = 0; png_const_charp base; @@ -8683,6 +10836,28 @@ static void gamma_composition_test(png_modifier *pm, r = random_32(); background.blue = (png_uint_16)r; background.gray = (png_uint_16)(r >> 16); + + /* In earlier libpng versions, those where DIGITIZE is set, any background + * gamma correction in the expand16 case was done using 8-bit gamma + * correction tables, resulting in larger errors. To cope with those + * cases use a 16-bit background value which will handle this gamma + * correction. + */ +# if DIGITIZE + if (expand_16 && (do_background == PNG_BACKGROUND_GAMMA_UNIQUE || + do_background == PNG_BACKGROUND_GAMMA_FILE) && + fabs(bg*screen_gamma-1) > PNG_GAMMA_THRESHOLD) + { + /* The background values will be looked up in an 8-bit table to do + * the gamma correction, so only select values which are an exact + * match for the 8-bit table entries: + */ + background.red = (png_uint_16)((background.red >> 8) * 257); + background.green = (png_uint_16)((background.green >> 8) * 257); + background.blue = (png_uint_16)((background.blue >> 8) * 257); + background.gray = (png_uint_16)((background.gray >> 8) * 257); + } +# endif } else /* 8 bit colors */ @@ -8696,8 +10871,17 @@ static void gamma_composition_test(png_modifier *pm, } background.index = 193; /* rgb(193,193,193) to detect errors */ + if (!(colour_type & PNG_COLOR_MASK_COLOR)) { + /* Because, currently, png_set_background is always called with + * 'need_expand' false in this case and because the gamma test itself + * doesn't cause an expand to 8-bit for lower bit depths the colour must + * be reduced to the correct range. + */ + if (bit_depth < 8) + background.gray &= (png_uint_16)((1U << bit_depth)-1); + /* Grayscale input, we do not convert to RGB (TBD), so we must set the * background to gray - else libpng seems to fail. */ @@ -8742,13 +10926,22 @@ perform_gamma_composition_tests(png_modifier *pm, int do_background, { png_byte colour_type = 0; png_byte bit_depth = 0; - int palette_number = 0; + unsigned int palette_number = 0; /* Skip the non-alpha cases - there is no setting of a transparency colour at * present. + * + * TODO: incorrect; the palette case sets tRNS and, now RGB and gray do, + * however the palette case fails miserably so is commented out below. */ - while (next_format(&colour_type, &bit_depth, &palette_number)) - if ((colour_type & PNG_COLOR_MASK_ALPHA) != 0) + while (next_format(&colour_type, &bit_depth, &palette_number, + pm->test_lbg_gamma_composition, pm->test_tRNS)) + if ((colour_type & PNG_COLOR_MASK_ALPHA) != 0 +#if 0 /* TODO: FIXME */ + /*TODO: FIXME: this should work */ + || colour_type == 3 +#endif + || (colour_type != 3 && palette_number != 0)) { unsigned int i, j; @@ -8769,31 +10962,46 @@ perform_gamma_composition_tests(png_modifier *pm, int do_background, static void init_gamma_errors(png_modifier *pm) { - pm->error_gray_2 = pm->error_gray_4 = pm->error_gray_8 = 0; - pm->error_color_8 = 0; - pm->error_indexed = 0; - pm->error_gray_16 = pm->error_color_16 = 0; + /* Use -1 to catch tests that were not actually run */ + pm->error_gray_2 = pm->error_gray_4 = pm->error_gray_8 = -1.; + pm->error_color_8 = -1.; + pm->error_indexed = -1.; + pm->error_gray_16 = pm->error_color_16 = -1.; } static void -summarize_gamma_errors(png_modifier *pm, png_const_charp who, int low_bit_depth) +print_one(const char *leader, double err) { + if (err != -1.) + printf(" %s %.5f\n", leader, err); +} + +static void +summarize_gamma_errors(png_modifier *pm, png_const_charp who, int low_bit_depth, + int indexed) +{ + fflush(stderr); + if (who) - printf("Gamma correction with %s:\n", who); + printf("\nGamma correction with %s:\n", who); + + else + printf("\nBasic gamma correction:\n"); if (low_bit_depth) { - printf(" 2 bit gray: %.5f\n", pm->error_gray_2); - printf(" 4 bit gray: %.5f\n", pm->error_gray_4); - printf(" 8 bit gray: %.5f\n", pm->error_gray_8); - printf(" 8 bit color: %.5f\n", pm->error_color_8); - printf(" indexed: %.5f\n", pm->error_indexed); + print_one(" 2 bit gray: ", pm->error_gray_2); + print_one(" 4 bit gray: ", pm->error_gray_4); + print_one(" 8 bit gray: ", pm->error_gray_8); + print_one(" 8 bit color:", pm->error_color_8); + if (indexed) + print_one(" indexed: ", pm->error_indexed); } -#ifdef DO_16BIT - printf(" 16 bit gray: %.5f\n", pm->error_gray_16); - printf(" 16 bit color: %.5f\n", pm->error_color_16); -#endif + print_one("16 bit gray: ", pm->error_gray_16); + print_one("16 bit color:", pm->error_color_16); + + fflush(stdout); } static void @@ -8803,7 +11011,9 @@ perform_gamma_test(png_modifier *pm, int summary) /* Save certain values for the temporary overrides below. */ unsigned int calculations_use_input_precision = pm->calculations_use_input_precision; - double maxout8 = pm->maxout8; +# ifdef PNG_READ_BACKGROUND_SUPPORTED + double maxout8 = pm->maxout8; +# endif /* First some arbitrary no-transform tests: */ if (!pm->this.speed && pm->test_gamma_threshold) @@ -8817,18 +11027,9 @@ perform_gamma_test(png_modifier *pm, int summary) /* Now some real transforms. */ if (pm->test_gamma_transform) { - init_gamma_errors(pm); - /*TODO: remove this. Necessary because the current libpng - * implementation works in 8 bits: - */ - if (pm->test_gamma_expand16) - pm->calculations_use_input_precision = 1; - perform_gamma_transform_tests(pm); - if (!calculations_use_input_precision) - pm->calculations_use_input_precision = 0; - if (summary) { + fflush(stderr); printf("Gamma correction error summary\n\n"); printf("The printed value is the maximum error in the pixel values\n"); printf("calculated by the libpng gamma correction code. The error\n"); @@ -8840,10 +11041,25 @@ perform_gamma_test(png_modifier *pm, int summary) printf("less than 1 for formats with fewer than 8 bits and a small\n"); printf("number (typically less than 5) for the 16 bit formats.\n"); printf("For performance reasons the value for 16 bit formats\n"); - printf("increases when the image file includes an sBIT chunk.\n\n"); - - summarize_gamma_errors(pm, 0/*who*/, 1); + printf("increases when the image file includes an sBIT chunk.\n"); + fflush(stdout); } + + init_gamma_errors(pm); + /*TODO: remove this. Necessary because the current libpng + * implementation works in 8 bits: + */ + if (pm->test_gamma_expand16) + pm->calculations_use_input_precision = 1; + perform_gamma_transform_tests(pm); + if (!calculations_use_input_precision) + pm->calculations_use_input_precision = 0; + + if (summary) + summarize_gamma_errors(pm, 0/*who*/, 1/*low bit depth*/, 1/*indexed*/); + + if (fail(pm)) + return; } /* The sbit tests produce much larger errors: */ @@ -8853,7 +11069,10 @@ perform_gamma_test(png_modifier *pm, int summary) perform_gamma_sbit_tests(pm); if (summary) - summarize_gamma_errors(pm, "sBIT", pm->sbitlow < 8U); + summarize_gamma_errors(pm, "sBIT", pm->sbitlow < 8U, 1/*indexed*/); + + if (fail(pm)) + return; } #ifdef DO_16BIT /* Should be READ_16BIT_SUPPORTED */ @@ -8865,10 +11084,15 @@ perform_gamma_test(png_modifier *pm, int summary) if (summary) { - printf("Gamma correction with 16 to 8 bit reduction:\n"); + fflush(stderr); + printf("\nGamma correction with 16 to 8 bit reduction:\n"); printf(" 16 bit gray: %.5f\n", pm->error_gray_16); printf(" 16 bit color: %.5f\n", pm->error_color_16); + fflush(stdout); } + + if (fail(pm)) + return; } #endif @@ -8892,7 +11116,10 @@ perform_gamma_test(png_modifier *pm, int summary) pm->maxout8 = maxout8; if (summary) - summarize_gamma_errors(pm, "background", 1); + summarize_gamma_errors(pm, "background", 1, 0/*indexed*/); + + if (fail(pm)) + return; } #endif @@ -8917,11 +11144,15 @@ perform_gamma_test(png_modifier *pm, int summary) pm->calculations_use_input_precision = 0; if (summary) - summarize_gamma_errors(pm, "alpha mode", 1); + summarize_gamma_errors(pm, "alpha mode", 1, 0/*indexed*/); + + if (fail(pm)) + return; } #endif } #endif /* PNG_READ_GAMMA_SUPPORTED */ +#endif /* PNG_READ_SUPPORTED */ /* INTERLACE MACRO VALIDATION */ /* This is copied verbatim from the specification, it is simply the pass @@ -8929,7 +11160,7 @@ perform_gamma_test(png_modifier *pm, int summary) * be indexed adam7[y][x] and notice that the pass numbers are based at * 1, not 0 - the base libpng uses. */ -static PNG_CONST +static const png_byte adam7[8][8] = { { 1,6,4,6,2,6,4,6 }, @@ -9158,7 +11389,7 @@ perform_interlace_macro_validation(void) if (m != f) { fprintf(stderr, "PNG_PASS_START_ROW(%d) = %u != %x\n", pass, m, f); - exit(1); + exit(99); } m = PNG_PASS_START_COL(pass); @@ -9166,7 +11397,7 @@ perform_interlace_macro_validation(void) if (m != f) { fprintf(stderr, "PNG_PASS_START_COL(%d) = %u != %x\n", pass, m, f); - exit(1); + exit(99); } m = PNG_PASS_ROW_SHIFT(pass); @@ -9174,7 +11405,7 @@ perform_interlace_macro_validation(void) if (m != f) { fprintf(stderr, "PNG_PASS_ROW_SHIFT(%d) = %u != %x\n", pass, m, f); - exit(1); + exit(99); } m = PNG_PASS_COL_SHIFT(pass); @@ -9182,7 +11413,7 @@ perform_interlace_macro_validation(void) if (m != f) { fprintf(stderr, "PNG_PASS_COL_SHIFT(%d) = %u != %x\n", pass, m, f); - exit(1); + exit(99); } /* Macros that depend on the image or sub-image height too: @@ -9196,23 +11427,36 @@ perform_interlace_macro_validation(void) */ for (v=0;;) { + /* The first two tests overflow if the pass row or column is outside + * the possible range for a 32-bit result. In fact the values should + * never be outside the range for a 31-bit result, but checking for 32 + * bits here ensures that if an app uses a bogus pass row or column + * (just so long as it fits in a 32 bit integer) it won't get a + * possibly dangerous overflow. + */ /* First the base 0 stuff: */ - m = PNG_ROW_FROM_PASS_ROW(v, pass); - f = png_row_from_pass_row(v, pass); - if (m != f) + if (v < png_pass_rows(0xFFFFFFFFU, pass)) { - fprintf(stderr, "PNG_ROW_FROM_PASS_ROW(%u, %d) = %u != %x\n", - v, pass, m, f); - exit(1); + m = PNG_ROW_FROM_PASS_ROW(v, pass); + f = png_row_from_pass_row(v, pass); + if (m != f) + { + fprintf(stderr, "PNG_ROW_FROM_PASS_ROW(%u, %d) = %u != %x\n", + v, pass, m, f); + exit(99); + } } - m = PNG_COL_FROM_PASS_COL(v, pass); - f = png_col_from_pass_col(v, pass); - if (m != f) + if (v < png_pass_cols(0xFFFFFFFFU, pass)) { - fprintf(stderr, "PNG_COL_FROM_PASS_COL(%u, %d) = %u != %x\n", - v, pass, m, f); - exit(1); + m = PNG_COL_FROM_PASS_COL(v, pass); + f = png_col_from_pass_col(v, pass); + if (m != f) + { + fprintf(stderr, "PNG_COL_FROM_PASS_COL(%u, %d) = %u != %x\n", + v, pass, m, f); + exit(99); + } } m = PNG_ROW_IN_INTERLACE_PASS(v, pass); @@ -9221,7 +11465,7 @@ perform_interlace_macro_validation(void) { fprintf(stderr, "PNG_ROW_IN_INTERLACE_PASS(%u, %d) = %u != %x\n", v, pass, m, f); - exit(1); + exit(99); } m = PNG_COL_IN_INTERLACE_PASS(v, pass); @@ -9230,7 +11474,7 @@ perform_interlace_macro_validation(void) { fprintf(stderr, "PNG_COL_IN_INTERLACE_PASS(%u, %d) = %u != %x\n", v, pass, m, f); - exit(1); + exit(99); } /* Then the base 1 stuff: */ @@ -9241,7 +11485,7 @@ perform_interlace_macro_validation(void) { fprintf(stderr, "PNG_PASS_ROWS(%u, %d) = %u != %x\n", v, pass, m, f); - exit(1); + exit(99); } m = PNG_PASS_COLS(v, pass); @@ -9250,7 +11494,7 @@ perform_interlace_macro_validation(void) { fprintf(stderr, "PNG_PASS_COLS(%u, %d) = %u != %x\n", v, pass, m, f); - exit(1); + exit(99); } /* Move to the next v - the stepping algorithm starts skipping @@ -9280,7 +11524,7 @@ perform_interlace_macro_validation(void) * The png_modifier code assumes that encodings[0] is sRGB and treats it * specially: do not change the first entry in this list! */ -static PNG_CONST color_encoding test_encodings[] = +static const color_encoding test_encodings[] = { /* sRGB: must be first in this list! */ /*gamma:*/ { 1/2.2, @@ -9302,6 +11546,11 @@ static PNG_CONST color_encoding test_encodings[] = /*red: */ { 0.716500716779386, 0.258728243040113, 0.000000000000000 }, /*green:*/ { 0.101020574397477, 0.724682314948566, 0.051211818965388 }, /*blue: */ { 0.146774385252705, 0.016589442011321, 0.773892783545073} }, +/* Fake encoding which selects just the green channel */ +/*gamma:*/ { 1.45/2.2, /* the 'Mac' gamma */ +/*red: */ { 0.716500716779386, 0.000000000000000, 0.000000000000000 }, +/*green:*/ { 0.101020574397477, 1.000000000000000, 0.051211818965388 }, +/*blue: */ { 0.146774385252705, 0.000000000000000, 0.773892783545073} }, }; /* signal handler @@ -9371,13 +11620,13 @@ static void signal_handler(int signum) } /* main program */ -int main(int argc, PNG_CONST char **argv) +int main(int argc, char **argv) { - volatile int summary = 1; /* Print the error summary at the end */ - volatile int memstats = 0; /* Print memory statistics at the end */ + int summary = 1; /* Print the error summary at the end */ + int memstats = 0; /* Print memory statistics at the end */ /* Create the given output file on success: */ - PNG_CONST char *volatile touch = NULL; + const char *touch = NULL; /* This is an array of standard gamma values (believe it or not I've seen * every one of these mentioned somewhere.) @@ -9393,6 +11642,10 @@ int main(int argc, PNG_CONST char **argv) anon_context(&pm.this); + gnu_volatile(summary) + gnu_volatile(memstats) + gnu_volatile(touch) + /* Add appropriate signal handlers, just the ANSI specified ones: */ signal(SIGABRT, signal_handler); signal(SIGFPE, signal_handler); @@ -9424,38 +11677,75 @@ int main(int argc, PNG_CONST char **argv) /* Default to error on warning: */ pm.this.treat_warnings_as_errors = 1; + /* Default assume_16_bit_calculations appropriately; this tells the checking + * code that 16-bit arithmetic is used for 8-bit samples when it would make a + * difference. + */ + pm.assume_16_bit_calculations = PNG_LIBPNG_VER >= 10700; + + /* Currently 16 bit expansion happens at the end of the pipeline, so the + * calculations are done in the input bit depth not the output. + * + * TODO: fix this + */ + pm.calculations_use_input_precision = 1U; + /* Store the test gammas */ pm.gammas = gammas; - pm.ngammas = (sizeof gammas) / (sizeof gammas[0]); + pm.ngammas = ARRAY_SIZE(gammas); pm.ngamma_tests = 0; /* default to off */ + /* Low bit depth gray images don't do well in the gamma tests, until + * this is fixed turn them off for some gamma cases: + */ +# ifdef PNG_WRITE_tRNS_SUPPORTED + pm.test_tRNS = 1; +# endif + pm.test_lbg = PNG_LIBPNG_VER >= 10600; + pm.test_lbg_gamma_threshold = 1; + pm.test_lbg_gamma_transform = PNG_LIBPNG_VER >= 10600; + pm.test_lbg_gamma_sbit = 1; + pm.test_lbg_gamma_composition = PNG_LIBPNG_VER >= 10700; + /* And the test encodings */ pm.encodings = test_encodings; - pm.nencodings = (sizeof test_encodings) / (sizeof test_encodings[0]); + pm.nencodings = ARRAY_SIZE(test_encodings); + +# if PNG_LIBPNG_VER < 10700 + pm.sbitlow = 8U; /* because libpng doesn't do sBIT below 8! */ +# else + pm.sbitlow = 1U; +# endif - pm.sbitlow = 8U; /* because libpng doesn't do sBIT below 8! */ /* The following allows results to pass if they correspond to anything in the * transformed range [input-.5,input+.5]; this is is required because of the - * way libpng treates the 16_TO_8 flag when building the gamma tables. + * way libpng treates the 16_TO_8 flag when building the gamma tables in + * releases up to 1.6.0. * * TODO: review this */ pm.use_input_precision_16to8 = 1U; + pm.use_input_precision_sbit = 1U; /* because libpng now rounds sBIT */ /* Some default values (set the behavior for 'make check' here). * These values simply control the maximum error permitted in the gamma - * transformations. The practial limits for human perception are described + * transformations. The practical limits for human perception are described * below (the setting for maxpc16), however for 8 bit encodings it isn't * possible to meet the accepted capabilities of human vision - i.e. 8 bit * images can never be good enough, regardless of encoding. */ pm.maxout8 = .1; /* Arithmetic error in *encoded* value */ pm.maxabs8 = .00005; /* 1/20000 */ - pm.maxcalc8 = .004; /* +/-1 in 8 bits for compose errors */ + pm.maxcalc8 = 1./255; /* +/-1 in 8 bits for compose errors */ pm.maxpc8 = .499; /* I.e., .499% fractional error */ pm.maxout16 = .499; /* Error in *encoded* value */ pm.maxabs16 = .00005;/* 1/20000 */ - pm.maxcalc16 =.000015;/* +/-1 in 16 bits for compose errors */ + pm.maxcalc16 =1./65535;/* +/-1 in 16 bits for compose errors */ +# if PNG_LIBPNG_VER < 10700 + pm.maxcalcG = 1./((1< +#include +#include + +#if defined(HAVE_CONFIG_H) && !defined(PNG_NO_CONFIG_H) +# include +#endif + +/* Define the following to use this test against your installed libpng, rather + * than the one being built here: + */ +#ifdef PNG_FREESTANDING_TESTS +# include +#else +# include "../../png.h" +#endif + +static int +read_png(FILE *fp) +{ + png_structp png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING,0,0,0); + png_infop info_ptr = NULL; + png_bytep row = NULL, display = NULL; + + if (png_ptr == NULL) + return 0; + + if (setjmp(png_jmpbuf(png_ptr))) + { + png_destroy_read_struct(&png_ptr, &info_ptr, NULL); + if (row != NULL) free(row); + if (display != NULL) free(display); + return 0; + } + + png_init_io(png_ptr, fp); + + info_ptr = png_create_info_struct(png_ptr); + if (info_ptr == NULL) + png_error(png_ptr, "OOM allocating info structure"); + + png_set_keep_unknown_chunks(png_ptr, PNG_HANDLE_CHUNK_ALWAYS, NULL, 0); + + png_read_info(png_ptr, info_ptr); + + { + size_t rowbytes = png_get_rowbytes(png_ptr, info_ptr); + + /* Failure to initialize these is harmless */ + row = malloc(rowbytes); + display = malloc(rowbytes); + + if (row == NULL || display == NULL) + png_error(png_ptr, "OOM allocating row buffers"); + + { + png_uint_32 height = png_get_image_height(png_ptr, info_ptr); +# ifdef PNG_READ_INTERLACING_SUPPORTED + int passes = png_set_interlace_handling(png_ptr); +# else /* !READ_INTERLACING */ + int passes = png_get_interlace_type(png_ptr, info_ptr) == + PNG_INTERLACE_ADAM7 ? PNG_INTERLACE_ADAM7_PASSES : 1; +# endif /* !READ_INTERLACING */ + int pass; + + png_start_read_image(png_ptr); + + for (pass = 0; pass < passes; ++pass) + { + png_uint_32 y = height; + +# ifndef PNG_READ_INTERLACING_SUPPORTED + if (passes == PNG_INTERLACE_ADAM7_PASSES) + y = PNG_PASS_ROWS(y, pass); +# endif /* READ_INTERLACING */ + + /* NOTE: this trashes the row each time; interlace handling won't + * work, but this avoids memory thrashing for speed testing. + */ + while (y-- > 0) + png_read_row(png_ptr, row, display); + } + } + } + + /* Make sure to read to the end of the file: */ + png_read_end(png_ptr, info_ptr); + png_destroy_read_struct(&png_ptr, &info_ptr, NULL); + free(row); + free(display); + return 1; +} + +int +main(void) +{ + /* Exit code 0 on success. */ + return !read_png(stdin); +} diff --git a/extern/libpng/contrib/libtests/tarith.c b/extern/libpng/contrib/libtests/tarith.c new file mode 100644 index 0000000000..c03f05a80b --- /dev/null +++ b/extern/libpng/contrib/libtests/tarith.c @@ -0,0 +1,999 @@ + +/* tarith.c + * + * Copyright (c) 2011-2013 John Cunningham Bowler + * + * Last changed in libpng 1.6.0 [February 14, 2013] + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + * + * Test internal arithmetic functions of libpng. + * + * This code must be linked against a math library (-lm), but does not require + * libpng or zlib to work. Because it includes the complete source of 'png.c' + * it tests the code with whatever compiler options are used to build it. + * Changing these options can substantially change the errors in the + * calculations that the compiler chooses! + */ +#define _POSIX_SOURCE 1 +#define _ISOC99_SOURCE 1 + +/* Obtain a copy of the code to be tested (plus other things), disabling + * stuff that is not required. + */ +#include +#include +#include +#include +#include + +#include "../../pngpriv.h" + +#define png_error png_warning + +void png_warning(png_const_structrp png_ptr, png_const_charp msg) +{ + fprintf(stderr, "validation: %s\n", msg); +} + +#define png_fixed_error png_fixed_warning + +void png_fixed_warning(png_const_structrp png_ptr, png_const_charp msg) +{ + fprintf(stderr, "overflow in: %s\n", msg); +} + +#define png_set_error_fn(pp, ep, efp, wfp) ((void)0) +#define png_malloc(pp, s) malloc(s) +#define png_malloc_warn(pp, s) malloc(s) +#define png_malloc_base(pp, s) malloc(s) +#define png_calloc(pp, s) calloc(1, (s)) +#define png_free(pp, s) free(s) + +#define png_safecat(b, sb, pos, str) (pos) +#define png_format_number(start, end, format, number) (start) + +#define crc32(crc, pp, s) (crc) +#define inflateReset(zs) Z_OK + +#define png_create_struct(type) (0) +#define png_destroy_struct(pp) ((void)0) +#define png_create_struct_2(type, m, mm) (0) +#define png_destroy_struct_2(pp, f, mm) ((void)0) + +#undef PNG_SIMPLIFIED_READ_SUPPORTED +#undef PNG_SIMPLIFIED_WRITE_SUPPORTED +#undef PNG_USER_MEM_SUPPORTED + +#include "../../png.c" + +/* Validate ASCII to fp routines. */ +static int verbose = 0; + +int validation_ascii_to_fp(int count, int argc, char **argv) +{ + int showall = 0; + double max_error=2; /* As a percentage error-in-last-digit/.5 */ + double max_error_abs=17; /* Used when precision is DBL_DIG */ + double max = 0; + double max_abs = 0; + double test = 0; /* Important to test this. */ + int precision = 5; + int nonfinite = 0; + int finite = 0; + int ok = 0; + int failcount = 0; + int minorarith = 0; + + while (--argc > 0) + if (strcmp(*++argv, "-a") == 0) + showall = 1; + else if (strcmp(*argv, "-e") == 0 && argc > 0) + { + --argc; + max_error = atof(*++argv); + } + else if (strcmp(*argv, "-E") == 0 && argc > 0) + { + --argc; + max_error_abs = atof(*++argv); + } + else + { + fprintf(stderr, "unknown argument %s\n", *argv); + return 1; + } + + do + { + size_t index; + int state, failed = 0; + char buffer[64]; + + if (isfinite(test)) + ++finite; + else + ++nonfinite; + + if (verbose) + fprintf(stderr, "%.*g %d\n", DBL_DIG, test, precision); + + /* Check for overflow in the buffer by setting a marker. */ + memset(buffer, 71, sizeof buffer); + + png_ascii_from_fp(0, buffer, precision+10, test, precision); + + /* Allow for a three digit exponent, this stuff will fail if + * the exponent is bigger than this! + */ + if (buffer[precision+7] != 71) + { + fprintf(stderr, "%g[%d] -> '%s'[%lu] buffer overflow\n", test, + precision, buffer, (unsigned long)strlen(buffer)); + failed = 1; + } + + /* Following are used for the number parser below and must be + * initialized to zero. + */ + state = 0; + index = 0; + if (!isfinite(test)) + { + /* Expect 'inf' */ + if (test >= 0 && strcmp(buffer, "inf") || + test < 0 && strcmp(buffer, "-inf")) + { + fprintf(stderr, "%g[%d] -> '%s' but expected 'inf'\n", test, + precision, buffer); + failed = 1; + } + } + else if (!png_check_fp_number(buffer, precision+10, &state, &index) || + buffer[index] != 0) + { + fprintf(stderr, "%g[%d] -> '%s' but has bad format ('%c')\n", test, + precision, buffer, buffer[index]); + failed = 1; + } + else if (PNG_FP_IS_NEGATIVE(state) && !(test < 0)) + { + fprintf(stderr, "%g[%d] -> '%s' but negative value not so reported\n", + test, precision, buffer); + failed = 1; + assert(!PNG_FP_IS_ZERO(state)); + assert(!PNG_FP_IS_POSITIVE(state)); + } + else if (PNG_FP_IS_ZERO(state) && !(test == 0)) + { + fprintf(stderr, "%g[%d] -> '%s' but zero value not so reported\n", + test, precision, buffer); + failed = 1; + assert(!PNG_FP_IS_NEGATIVE(state)); + assert(!PNG_FP_IS_POSITIVE(state)); + } + else if (PNG_FP_IS_POSITIVE(state) && !(test > 0)) + { + fprintf(stderr, "%g[%d] -> '%s' but positive value not so reported\n", + test, precision, buffer); + failed = 1; + assert(!PNG_FP_IS_NEGATIVE(state)); + assert(!PNG_FP_IS_ZERO(state)); + } + else + { + /* Check the result against the original. */ + double out = atof(buffer); + double change = fabs((out - test)/test); + double allow = .5/pow(10, + (precision >= DBL_DIG) ? DBL_DIG-1 : precision-1); + + /* NOTE: if you hit this error case are you compiling with gcc + * and -O0? Try -O2 - the errors can accumulate if the FP + * code above is not optimized and may drift outside the .5 in + * DBL_DIG allowed. In any case a small number of errors may + * occur (very small ones - 1 or 2%) because of rounding in the + * calculations, either in the conversion API or in atof. + */ + if (change >= allow && (isfinite(out) || + fabs(test/DBL_MAX) <= 1-allow)) + { + double percent = (precision >= DBL_DIG) ? max_error_abs : max_error; + double allowp = (change-allow)*100/allow; + + if (precision >= DBL_DIG) + { + if (max_abs < allowp) max_abs = allowp; + } + + else + { + if (max < allowp) max = allowp; + } + + if (showall || allowp >= percent) + { + fprintf(stderr, + "%.*g[%d] -> '%s' -> %.*g number changed (%g > %g (%d%%))\n", + DBL_DIG, test, precision, buffer, DBL_DIG, out, change, allow, + (int)round(allowp)); + failed = 1; + } + else + ++minorarith; + } + } + + if (failed) + ++failcount; + else + ++ok; + +skip: + /* Generate a new number and precision. */ + precision = rand(); + if (precision & 1) test = -test; + precision >>= 1; + + /* Generate random numbers. */ + if (test == 0 || !isfinite(test)) + test = precision+1; + else + { + /* Derive the exponent from the previous rand() value. */ + int exponent = precision % (DBL_MAX_EXP - DBL_MIN_EXP) + DBL_MIN_EXP; + int tmp; + test = frexp(test * rand(), &tmp); + test = ldexp(test, exponent); + precision >>= 8; /* arbitrary */ + } + + /* This limits the precision to 32 digits, enough for standard + * IEEE implementations which have at most 15 digits. + */ + precision = (precision & 0x1f) + 1; + } + while (--count); + + printf("Tested %d finite values, %d non-finite, %d OK (%d failed) %d minor " + "arithmetic errors\n", finite, nonfinite, ok, failcount, minorarith); + printf(" Error with >=%d digit precision %.2f%%\n", DBL_DIG, max_abs); + printf(" Error with < %d digit precision %.2f%%\n", DBL_DIG, max); + + return 0; +} + +/* Observe that valid FP numbers have the forms listed in the PNG extensions + * specification: + * + * [+,-]{integer,integer.fraction,.fraction}[{e,E}[+,-]integer] + * + * Test each of these in turn, including invalid cases. + */ +typedef enum checkfp_state +{ + start, fraction, exponent, states +} checkfp_state; + +/* The characters (other than digits) that characterize the states: */ +static const char none[] = ""; +static const char hexdigits[16] = "0123456789ABCDEF"; + +static const struct +{ + const char *start; /* Characters valid at the start */ + const char *end; /* Valid characters that end the state */ + const char *tests; /* Characters to test after 2 digits seen */ +} +state_characters[states] = +{ + /* start: */ { "+-.", ".eE", "+-.e*0369" }, + /* fraction: */ { none, "eE", "+-.E#0147" }, + /* exponent: */ { "+-", none, "+-.eE^0258" } +}; + +typedef struct +{ + char number[1024]; /* Buffer for number being tested */ + int limit; /* Command line limit */ + int verbose; /* Shadows global variable */ + int ctimes; /* Number of numbers tested */ + int cmillions; /* Count of millions of numbers */ + int cinvalid; /* Invalid strings checked */ + int cnoaccept; /* Characters not accepted */ +} +checkfp_command; + +typedef struct +{ + int cnumber; /* Index into number string */ + checkfp_state check_state; /* Current number state */ + int at_start; /* At start (first character) of state */ + int cdigits_in_state; /* Digits seen in that state */ + int limit; /* Limit on same for checking all chars */ + int state; /* Current parser state */ + int is_negative; /* Number is negative */ + int is_zero; /* Number is (still) zero */ + int number_was_valid; /* Previous character validity */ +} +checkfp_control; + +static int check_all_characters(checkfp_command *co, checkfp_control c); + +static int check_some_characters(checkfp_command *co, checkfp_control c, + const char *tests); + +static int check_one_character(checkfp_command *co, checkfp_control c, int ch) +{ + /* Test this character (ch) to ensure the parser does the correct thing. + */ + size_t index = 0; + const char test = (char)ch; + int number_is_valid = png_check_fp_number(&test, 1, &c.state, &index); + int character_accepted = (index == 1); + + if (c.check_state != exponent && isdigit(ch) && ch != '0') + c.is_zero = 0; + + if (c.check_state == start && c.at_start && ch == '-') + c.is_negative = 1; + + if (isprint(ch)) + co->number[c.cnumber++] = (char)ch; + else + { + co->number[c.cnumber++] = '<'; + co->number[c.cnumber++] = hexdigits[(ch >> 4) & 0xf]; + co->number[c.cnumber++] = hexdigits[ch & 0xf]; + co->number[c.cnumber++] = '>'; + } + co->number[c.cnumber] = 0; + + if (co->verbose > 1) + fprintf(stderr, "%s\n", co->number); + + if (++(co->ctimes) == 1000000) + { + if (co->verbose == 1) + fputc('.', stderr); + co->ctimes = 0; + ++(co->cmillions); + } + + if (!number_is_valid) + ++(co->cinvalid); + + if (!character_accepted) + ++(co->cnoaccept); + + /* This should never fail (it's a serious bug if it does): */ + if (index != 0 && index != 1) + { + fprintf(stderr, "%s: read beyond end of string (%lu)\n", co->number, + (unsigned long)index); + return 0; + } + + /* Validate the new state, note that the PNG_FP_IS_ macros all return + * false unless the number is valid. + */ + if (PNG_FP_IS_NEGATIVE(c.state) != + (number_is_valid && !c.is_zero && c.is_negative)) + { + fprintf(stderr, "%s: negative when it is not\n", co->number); + return 0; + } + + if (PNG_FP_IS_ZERO(c.state) != (number_is_valid && c.is_zero)) + { + fprintf(stderr, "%s: zero when it is not\n", co->number); + return 0; + } + + if (PNG_FP_IS_POSITIVE(c.state) != + (number_is_valid && !c.is_zero && !c.is_negative)) + { + fprintf(stderr, "%s: positive when it is not\n", co->number); + return 0; + } + + /* Testing a digit */ + if (isdigit(ch)) + { + if (!character_accepted) + { + fprintf(stderr, "%s: digit '%c' not accepted\n", co->number, ch); + return 0; + } + + if (!number_is_valid) + { + fprintf(stderr, "%s: saw a digit (%c) but number not valid\n", + co->number, ch); + return 0; + } + + ++c.cdigits_in_state; + c.at_start = 0; + c.number_was_valid = 1; + + /* Continue testing characters in this state. Either test all of + * them or, if we have already seen one digit in this state, just test a + * limited set. + */ + if (c.cdigits_in_state < 1) + return check_all_characters(co, c); + + else + return check_some_characters(co, c, + state_characters[c.check_state].tests); + } + + /* A non-digit; is it allowed here? */ + else if (((ch == '+' || ch == '-') && c.check_state != fraction && + c.at_start) || + (ch == '.' && c.check_state == start) || + ((ch == 'e' || ch == 'E') && c.number_was_valid && + c.check_state != exponent)) + { + if (!character_accepted) + { + fprintf(stderr, "%s: character '%c' not accepted\n", co->number, ch); + return 0; + } + + /* The number remains valid after start of fraction but nowhere else. */ + if (number_is_valid && (c.check_state != start || ch != '.')) + { + fprintf(stderr, "%s: saw a non-digit (%c) but number valid\n", + co->number, ch); + return 0; + } + + c.number_was_valid = number_is_valid; + + /* Check for a state change. When changing to 'fraction' if the number + * is valid at this point set the at_start to false to allow an exponent + * 'e' to come next. + */ + if (c.check_state == start && ch == '.') + { + c.check_state = fraction; + c.at_start = !number_is_valid; + c.cdigits_in_state = 0; + c.limit = co->limit; + return check_all_characters(co, c); + } + + else if (c.check_state < exponent && (ch == 'e' || ch == 'E')) + { + c.check_state = exponent; + c.at_start = 1; + c.cdigits_in_state = 0; + c.limit = co->limit; + return check_all_characters(co, c); + } + + /* Else it was a sign, and the state doesn't change. */ + else + { + if (ch != '-' && ch != '+') + { + fprintf(stderr, "checkfp: internal error (1)\n"); + return 0; + } + + c.at_start = 0; + return check_all_characters(co, c); + } + } + + /* Testing an invalid character */ + else + { + if (character_accepted) + { + fprintf(stderr, "%s: character '%c' [0x%.2x] accepted\n", co->number, + ch, ch); + return 0; + } + + if (number_is_valid != c.number_was_valid) + { + fprintf(stderr, + "%s: character '%c' [0x%.2x] changed number validity\n", co->number, + ch, ch); + return 0; + } + + /* Do nothing - the parser has stuck; return success and keep going with + * the next character. + */ + } + + /* Successful return (the caller will try the next character.) */ + return 1; +} + +static int check_all_characters(checkfp_command *co, checkfp_control c) +{ + int ch; + + if (c.cnumber+4 < sizeof co->number) for (ch=0; ch<256; ++ch) + { + if (!check_one_character(co, c, ch)) + return 0; + } + + return 1; +} + +static int check_some_characters(checkfp_command *co, checkfp_control c, + const char *tests) +{ + int i; + + --(c.limit); + + if (c.cnumber+4 < sizeof co->number && c.limit >= 0) + { + if (c.limit > 0) for (i=0; tests[i]; ++i) + { + if (!check_one_character(co, c, tests[i])) + return 0; + } + + /* At the end check all the characters. */ + else + return check_all_characters(co, c); + } + + return 1; +} + +int validation_checkfp(int count, int argc, char **argv) +{ + int result; + checkfp_command command; + checkfp_control control; + + command.number[0] = 0; + command.limit = 3; + command.verbose = verbose; + command.ctimes = 0; + command.cmillions = 0; + command.cinvalid = 0; + command.cnoaccept = 0; + + while (--argc > 0) + { + ++argv; + if (argc > 1 && strcmp(*argv, "-l") == 0) + { + --argc; + command.limit = atoi(*++argv); + } + + else + { + fprintf(stderr, "unknown argument %s\n", *argv); + return 1; + } + } + + control.cnumber = 0; + control.check_state = start; + control.at_start = 1; + control.cdigits_in_state = 0; + control.limit = command.limit; + control.state = 0; + control.is_negative = 0; + control.is_zero = 1; + control.number_was_valid = 0; + + result = check_all_characters(&command, control); + + printf("checkfp: %s: checked %d,%.3d,%.3d,%.3d strings (%d invalid)\n", + result ? "pass" : "FAIL", command.cmillions / 1000, + command.cmillions % 1000, command.ctimes / 1000, command.ctimes % 1000, + command.cinvalid); + + return result; +} + +int validation_muldiv(int count, int argc, char **argv) +{ + int tested = 0; + int overflow = 0; + int error = 0; + int error64 = 0; + int passed = 0; + int randbits = 0; + png_uint_32 randbuffer; + png_fixed_point a; + png_int_32 times, div; + + while (--argc > 0) + { + fprintf(stderr, "unknown argument %s\n", *++argv); + return 1; + } + + /* Find out about the random number generator. */ + randbuffer = RAND_MAX; + while (randbuffer != 0) ++randbits, randbuffer >>= 1; + printf("Using random number generator that makes %d bits\n", randbits); + for (div=0; div<32; div += randbits) + randbuffer = (randbuffer << randbits) ^ rand(); + + a = 0; + times = div = 0; + do + { + png_fixed_point result; + /* NOTE: your mileage may vary, a type is required below that can + * hold 64 bits or more, if floating point is used a 64-bit or + * better mantissa is required. + */ + long long int fp, fpround; + unsigned long hi, lo; + int ok; + + /* Check the values, png_64bit_product can only handle positive + * numbers, so correct for that here. + */ + { + long u1, u2; + int n = 0; + if (a < 0) u1 = -a, n = 1; else u1 = a; + if (times < 0) u2 = -times, n = !n; else u2 = times; + png_64bit_product(u1, u2, &hi, &lo); + if (n) + { + /* -x = ~x+1 */ + lo = ((~lo) + 1) & 0xffffffff; + hi = ~hi; + if (lo == 0) ++hi; + } + } + + fp = a; + fp *= times; + if ((fp & 0xffffffff) != lo || ((fp >> 32) & 0xffffffff) != hi) + { + fprintf(stderr, "png_64bit_product %d * %d -> %lx|%.8lx not %llx\n", + a, times, hi, lo, fp); + ++error64; + } + + if (div != 0) + { + /* Round - this is C round to zero. */ + if ((fp < 0) != (div < 0)) + fp -= div/2; + else + fp += div/2; + + fp /= div; + fpround = fp; + /* Assume 2's complement here: */ + ok = fpround <= PNG_UINT_31_MAX && + fpround >= -1-(long long int)PNG_UINT_31_MAX; + if (!ok) ++overflow; + } + else + ok = 0, ++overflow, fpround = fp/*misleading*/; + + if (verbose) + fprintf(stderr, "TEST %d * %d / %d -> %lld (%s)\n", a, times, div, + fp, ok ? "ok" : "overflow"); + + ++tested; + if (png_muldiv(&result, a, times, div) != ok) + { + ++error; + if (ok) + fprintf(stderr, "%d * %d / %d -> overflow (expected %lld)\n", a, + times, div, fp); + else + fprintf(stderr, "%d * %d / %d -> %d (expected overflow %lld)\n", a, + times, div, result, fp); + } + else if (ok && result != fpround) + { + ++error; + fprintf(stderr, "%d * %d / %d -> %d not %lld\n", a, times, div, result, + fp); + } + else + ++passed; + + /* Generate three new values, this uses rand() and rand() only returns + * up to RAND_MAX. + */ + /* CRUDE */ + a += times; + times += div; + div = randbuffer; + randbuffer = (randbuffer << randbits) ^ rand(); + } + while (--count > 0); + + printf("%d tests including %d overflows, %d passed, %d failed (%d 64-bit " + "errors)\n", tested, overflow, passed, error, error64); + return 0; +} + +/* When FP is on this just becomes a speed test - compile without FP to get real + * validation. + */ +#ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED +#define LN2 .000010576586617430806112933839 /* log(2)/65536 */ +#define L2INV 94548.46219969910586572651 /* 65536/log(2) */ + +/* For speed testing, need the internal functions too: */ +static png_uint_32 png_log8bit(unsigned x) +{ + if (x > 0) + return (png_uint_32)floor(.5-log(x/255.)*L2INV); + + return 0xffffffff; +} + +static png_uint_32 png_log16bit(png_uint_32 x) +{ + if (x > 0) + return (png_uint_32)floor(.5-log(x/65535.)*L2INV); + + return 0xffffffff; +} + +static png_uint_32 png_exp(png_uint_32 x) +{ + return (png_uint_32)floor(.5 + exp(x * -LN2) * 0xffffffffU); +} + +static png_byte png_exp8bit(png_uint_32 log) +{ + return (png_byte)floor(.5 + exp(log * -LN2) * 255); +} + +static png_uint_16 png_exp16bit(png_uint_32 log) +{ + return (png_uint_16)floor(.5 + exp(log * -LN2) * 65535); +} +#endif /* FLOATING_ARITHMETIC */ + +int validation_gamma(int argc, char **argv) +{ + double gamma[9] = { 2.2, 1.8, 1.52, 1.45, 1., 1/1.45, 1/1.52, 1/1.8, 1/2.2 }; + double maxerr; + int i, silent=0, onlygamma=0; + + /* Silence the output with -s, just test the gamma functions with -g: */ + while (--argc > 0) + if (strcmp(*++argv, "-s") == 0) + silent = 1; + else if (strcmp(*argv, "-g") == 0) + onlygamma = 1; + else + { + fprintf(stderr, "unknown argument %s\n", *argv); + return 1; + } + + if (!onlygamma) + { + /* First validate the log functions: */ + maxerr = 0; + for (i=0; i<256; ++i) + { + double correct = -log(i/255.)/log(2.)*65536; + double error = png_log8bit(i) - correct; + + if (i != 0 && fabs(error) > maxerr) + maxerr = fabs(error); + + if (i == 0 && png_log8bit(i) != 0xffffffff || + i != 0 && png_log8bit(i) != floor(correct+.5)) + { + fprintf(stderr, "8-bit log error: %d: got %u, expected %f\n", + i, png_log8bit(i), correct); + } + } + + if (!silent) + printf("maximum 8-bit log error = %f\n", maxerr); + + maxerr = 0; + for (i=0; i<65536; ++i) + { + double correct = -log(i/65535.)/log(2.)*65536; + double error = png_log16bit(i) - correct; + + if (i != 0 && fabs(error) > maxerr) + maxerr = fabs(error); + + if (i == 0 && png_log16bit(i) != 0xffffffff || + i != 0 && png_log16bit(i) != floor(correct+.5)) + { + if (error > .68) /* By experiment error is less than .68 */ + { + fprintf(stderr, "16-bit log error: %d: got %u, expected %f" + " error: %f\n", i, png_log16bit(i), correct, error); + } + } + } + + if (!silent) + printf("maximum 16-bit log error = %f\n", maxerr); + + /* Now exponentiations. */ + maxerr = 0; + for (i=0; i<=0xfffff; ++i) + { + double correct = exp(-i/65536. * log(2.)) * (65536. * 65536); + double error = png_exp(i) - correct; + + if (fabs(error) > maxerr) + maxerr = fabs(error); + if (fabs(error) > 1883) /* By experiment. */ + { + fprintf(stderr, "32-bit exp error: %d: got %u, expected %f" + " error: %f\n", i, png_exp(i), correct, error); + } + } + + if (!silent) + printf("maximum 32-bit exp error = %f\n", maxerr); + + maxerr = 0; + for (i=0; i<=0xfffff; ++i) + { + double correct = exp(-i/65536. * log(2.)) * 255; + double error = png_exp8bit(i) - correct; + + if (fabs(error) > maxerr) + maxerr = fabs(error); + if (fabs(error) > .50002) /* By experiment */ + { + fprintf(stderr, "8-bit exp error: %d: got %u, expected %f" + " error: %f\n", i, png_exp8bit(i), correct, error); + } + } + + if (!silent) + printf("maximum 8-bit exp error = %f\n", maxerr); + + maxerr = 0; + for (i=0; i<=0xfffff; ++i) + { + double correct = exp(-i/65536. * log(2.)) * 65535; + double error = png_exp16bit(i) - correct; + + if (fabs(error) > maxerr) + maxerr = fabs(error); + if (fabs(error) > .524) /* By experiment */ + { + fprintf(stderr, "16-bit exp error: %d: got %u, expected %f" + " error: %f\n", i, png_exp16bit(i), correct, error); + } + } + + if (!silent) + printf("maximum 16-bit exp error = %f\n", maxerr); + } /* !onlygamma */ + + /* Test the overall gamma correction. */ + for (i=0; i<9; ++i) + { + unsigned j; + double g = gamma[i]; + png_fixed_point gfp = floor(g * PNG_FP_1 + .5); + + if (!silent) + printf("Test gamma %f\n", g); + + maxerr = 0; + for (j=0; j<256; ++j) + { + double correct = pow(j/255., g) * 255; + png_byte out = png_gamma_8bit_correct(j, gfp); + double error = out - correct; + + if (fabs(error) > maxerr) + maxerr = fabs(error); + if (out != floor(correct+.5)) + { + fprintf(stderr, "8bit %d ^ %f: got %d expected %f error %f\n", + j, g, out, correct, error); + } + } + + if (!silent) + printf("gamma %f: maximum 8-bit error %f\n", g, maxerr); + + maxerr = 0; + for (j=0; j<65536; ++j) + { + double correct = pow(j/65535., g) * 65535; + png_uint_16 out = png_gamma_16bit_correct(j, gfp); + double error = out - correct; + + if (fabs(error) > maxerr) + maxerr = fabs(error); + if (fabs(error) > 1.62) + { + fprintf(stderr, "16bit %d ^ %f: got %d expected %f error %f\n", + j, g, out, correct, error); + } + } + + if (!silent) + printf("gamma %f: maximum 16-bit error %f\n", g, maxerr); + } + + return 0; +} + +/**************************** VALIDATION TESTS ********************************/ +/* Various validation routines are included herein, they require some + * definition for png_warning and png_error, seetings of VALIDATION: + * + * 1: validates the ASCII to floating point conversions + * 2: validates png_muldiv + * 3: accuracy test of fixed point gamma tables + */ + +/* The following COUNT (10^8) takes about 1 hour on a 1GHz Pentium IV + * processor. + */ +#define COUNT 1000000000 + +int main(int argc, char **argv) +{ + int count = COUNT; + + while (argc > 1) + { + if (argc > 2 && strcmp(argv[1], "-c") == 0) + { + count = atoi(argv[2]); + argc -= 2; + argv += 2; + } + + else if (strcmp(argv[1], "-v") == 0) + { + ++verbose; + --argc; + ++argv; + } + + else + break; + } + + if (count > 0 && argc > 1) + { + if (strcmp(argv[1], "ascii") == 0) + return validation_ascii_to_fp(count, argc-1, argv+1); + else if (strcmp(argv[1], "checkfp") == 0) + return validation_checkfp(count, argc-1, argv+1); + else if (strcmp(argv[1], "muldiv") == 0) + return validation_muldiv(count, argc-1, argv+1); + else if (strcmp(argv[1], "gamma") == 0) + return validation_gamma(argc-1, argv+1); + } + + /* Bad argument: */ + fprintf(stderr, + "usage: tarith [-v] [-c count] {ascii,muldiv,gamma} [args]\n"); + fprintf(stderr, " arguments: ascii [-a (all results)] [-e error%%]\n"); + fprintf(stderr, " checkfp [-l max-number-chars]\n"); + fprintf(stderr, " muldiv\n"); + fprintf(stderr, " gamma -s (silent) -g (only gamma; no log)\n"); + return 1; +} diff --git a/extern/libpng/contrib/libtests/timepng.c b/extern/libpng/contrib/libtests/timepng.c new file mode 100644 index 0000000000..23d8b17b13 --- /dev/null +++ b/extern/libpng/contrib/libtests/timepng.c @@ -0,0 +1,608 @@ +/* timepng.c + * + * Copyright (c) 2013,2016 John Cunningham Bowler + * + * Last changed in libpng 1.6.22 [May 26, 2016] + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + * + * Load an arbitrary number of PNG files (from the command line, or, if there + * are no arguments on the command line, from stdin) then run a time test by + * reading each file by row or by image (possibly with transforms in the latter + * case). The only output is a time as a floating point number of seconds with + * 9 decimal digits. + */ +#define _POSIX_C_SOURCE 199309L /* for clock_gettime */ + +#include +#include +#include +#include +#include + +#include + +#if defined(HAVE_CONFIG_H) && !defined(PNG_NO_CONFIG_H) +# include +#endif + +/* Define the following to use this test against your installed libpng, rather + * than the one being built here: + */ +#ifdef PNG_FREESTANDING_TESTS +# include +#else +# include "../../png.h" +#endif + +/* The following is to support direct compilation of this file as C++ */ +#ifdef __cplusplus +# define voidcast(type, value) static_cast(value) +#else +# define voidcast(type, value) (value) +#endif /* __cplusplus */ + +/* 'CLOCK_PROCESS_CPUTIME_ID' is one of the clock timers for clock_gettime. It + * need not be supported even when clock_gettime is available. It returns the + * 'CPU' time the process has consumed. 'CPU' time is assumed to include time + * when the CPU is actually blocked by a pending cache fill but not time + * waiting for page faults. The attempt is to get a measure of the actual time + * the implementation takes to read a PNG ignoring the potentially very large IO + * overhead. + */ +#if defined (CLOCK_PROCESS_CPUTIME_ID) && defined(PNG_STDIO_SUPPORTED) &&\ + defined(PNG_EASY_ACCESS_SUPPORTED) &&\ + (PNG_LIBPNG_VER >= 10700 ? defined(PNG_READ_PNG_SUPPORTED) :\ + defined (PNG_SEQUENTIAL_READ_SUPPORTED) &&\ + defined(PNG_INFO_IMAGE_SUPPORTED)) + +typedef struct +{ + FILE *input; + FILE *output; +} io_data; + +static PNG_CALLBACK(void, read_and_copy, + (png_structp png_ptr, png_bytep buffer, size_t cb)) +{ + io_data *io = (io_data*)png_get_io_ptr(png_ptr); + + if (fread(buffer, cb, 1, io->input) != 1) + png_error(png_ptr, strerror(errno)); + + if (fwrite(buffer, cb, 1, io->output) != 1) + { + perror("temporary file"); + fprintf(stderr, "temporary file PNG write failed\n"); + exit(1); + } +} + +static void read_by_row(png_structp png_ptr, png_infop info_ptr, + FILE *write_ptr, FILE *read_ptr) +{ + /* These don't get freed on error, this is fine; the program immediately + * exits. + */ + png_bytep row = NULL, display = NULL; + io_data io_copy; + + if (write_ptr != NULL) + { + /* Set up for a copy to the temporary file: */ + io_copy.input = read_ptr; + io_copy.output = write_ptr; + png_set_read_fn(png_ptr, &io_copy, read_and_copy); + } + + png_read_info(png_ptr, info_ptr); + + { + size_t rowbytes = png_get_rowbytes(png_ptr, info_ptr); + + row = voidcast(png_bytep,malloc(rowbytes)); + display = voidcast(png_bytep,malloc(rowbytes)); + + if (row == NULL || display == NULL) + png_error(png_ptr, "OOM allocating row buffers"); + + { + png_uint_32 height = png_get_image_height(png_ptr, info_ptr); + int passes = png_set_interlace_handling(png_ptr); + int pass; + + png_start_read_image(png_ptr); + + for (pass = 0; pass < passes; ++pass) + { + png_uint_32 y = height; + + /* NOTE: this trashes the row each time; interlace handling won't + * work, but this avoids memory thrashing for speed testing and is + * somewhat representative of an application that works row-by-row. + */ + while (y-- > 0) + png_read_row(png_ptr, row, display); + } + } + } + + /* Make sure to read to the end of the file: */ + png_read_end(png_ptr, info_ptr); + + /* Free this up: */ + free(row); + free(display); +} + +static PNG_CALLBACK(void, no_warnings, (png_structp png_ptr, + png_const_charp warning)) +{ + (void)png_ptr; + (void)warning; +} + +static int read_png(FILE *fp, png_int_32 transforms, FILE *write_file) +{ + png_structp png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING,0,0, + no_warnings); + png_infop info_ptr = NULL; + + if (png_ptr == NULL) + return 0; + + if (setjmp(png_jmpbuf(png_ptr))) + { + png_destroy_read_struct(&png_ptr, &info_ptr, NULL); + return 0; + } + +# ifdef PNG_BENIGN_ERRORS_SUPPORTED + png_set_benign_errors(png_ptr, 1/*allowed*/); +# endif + png_init_io(png_ptr, fp); + + info_ptr = png_create_info_struct(png_ptr); + + if (info_ptr == NULL) + png_error(png_ptr, "OOM allocating info structure"); + + if (transforms < 0) + read_by_row(png_ptr, info_ptr, write_file, fp); + + else + png_read_png(png_ptr, info_ptr, transforms, NULL/*params*/); + + png_destroy_read_struct(&png_ptr, &info_ptr, NULL); + return 1; +} + +static int mytime(struct timespec *t) +{ + /* Do the timing using clock_gettime and the per-process timer. */ + if (!clock_gettime(CLOCK_PROCESS_CPUTIME_ID, t)) + return 1; + + perror("CLOCK_PROCESS_CPUTIME_ID"); + fprintf(stderr, "timepng: could not get the time\n"); + return 0; +} + +static int perform_one_test(FILE *fp, int nfiles, png_int_32 transforms) +{ + int i; + struct timespec before, after; + + /* Clear out all errors: */ + rewind(fp); + + if (mytime(&before)) + { + for (i=0; i {files}\n" +" Read the files into , output the count. Options are ignored.\n" +" timepng --dissemble [options]\n" +" Time files from , additional files may not be given.\n" +" Otherwise:\n" +" Read the files into a temporary file and time the decode\n" +"Transforms:\n" +" --by-image: read by image with png_read_png\n" +" --: implies by-image, use PNG_TRANSFORM_\n" +" Otherwise: read by row using png_read_row (to a single row buffer)\n" + /* ISO C90 string length max 509 */);fprintf(stderr, +"{files}:\n" +" PNG files to copy into the assembly and time. Invalid files are skipped\n" +" with appropriate error messages. If no files are given the list of files\n" +" is read from stdin with each file name terminated by a newline\n" +"Output:\n" +" For --assemble the output is the name of the assembly file followed by the\n" +" count of the files it contains; the arguments for --dissemble. Otherwise\n" +" the output is the total decode time in seconds.\n"); + + exit(99); +} + +int main(int argc, char **argv) +{ + int ok = 0; + int err = 0; + int nfiles = 0; + int transforms = -1; /* by row */ + const char *assembly = NULL; + FILE *fp; + + if (argc > 2 && strcmp(argv[1], "--assemble") == 0) + { + /* Just build the test file, argv[2] is the file name. */ + assembly = argv[2]; + fp = fopen(assembly, "wb"); + if (fp == NULL) + { + perror(assembly); + fprintf(stderr, "timepng --assemble %s: could not open for write\n", + assembly); + usage(NULL); + } + + argv += 2; + argc -= 2; + } + + else if (argc > 3 && strcmp(argv[1], "--dissemble") == 0) + { + fp = fopen(argv[2], "rb"); + + if (fp == NULL) + { + perror(argv[2]); + fprintf(stderr, "timepng --dissemble %s: could not open for read\n", + argv[2]); + usage(NULL); + } + + nfiles = atoi(argv[3]); + if (nfiles <= 0) + { + fprintf(stderr, + "timepng --dissemble : %s is not a count\n", + argv[3]); + exit(99); + } +#ifdef __COVERITY__ + else + { + nfiles &= PNG_UINT_31_MAX; + } +#endif + + argv += 3; + argc -= 3; + } + + else /* Else use a temporary file */ + { +#ifndef __COVERITY__ + fp = tmpfile(); +#else + /* Experimental. Coverity says tmpfile() is insecure because it + * generates predictable names. + * + * It is possible to satisfy Coverity by using mkstemp(); however, + * any platform supporting mkstemp() undoubtedly has a secure tmpfile() + * implementation as well, and doesn't need the fix. Note that + * the fix won't work on platforms that don't support mkstemp(). + * + * https://www.securecoding.cert.org/confluence/display/c/ + * FIO21-C.+Do+not+create+temporary+files+in+shared+directories + * says that most historic implementations of tmpfile() provide + * only a limited number of possible temporary file names + * (usually 26) before file names are recycled. That article also + * provides a secure solution that unfortunately depends upon mkstemp(). + */ + char tmpfile[] = "timepng-XXXXXX"; + int filedes; + umask(0177); + filedes = mkstemp(tmpfile); + if (filedes < 0) + fp = NULL; + else + { + fp = fdopen(filedes,"w+"); + /* Hide the filename immediately and ensure that the file does + * not exist after the program ends + */ + (void) unlink(tmpfile); + } +#endif + + if (fp == NULL) + { + perror("tmpfile"); + fprintf(stderr, "timepng: could not open the temporary file\n"); + exit(1); /* not a user error */ + } + } + + /* Handle the transforms: */ + while (argc > 1 && argv[1][0] == '-' && argv[1][1] == '-') + { + const char *opt = *++argv + 2; + + --argc; + + /* Transforms turn on the by-image processing and maybe set some + * transforms: + */ + if (transforms == -1) + transforms = PNG_TRANSFORM_IDENTITY; + + if (strcmp(opt, "by-image") == 0) + { + /* handled above */ + } + +# define OPT(name) else if (strcmp(opt, #name) == 0)\ + transforms |= PNG_TRANSFORM_ ## name + + OPT(STRIP_16); + OPT(STRIP_ALPHA); + OPT(PACKING); + OPT(PACKSWAP); + OPT(EXPAND); + OPT(INVERT_MONO); + OPT(SHIFT); + OPT(BGR); + OPT(SWAP_ALPHA); + OPT(SWAP_ENDIAN); + OPT(INVERT_ALPHA); + OPT(STRIP_FILLER); + OPT(STRIP_FILLER_BEFORE); + OPT(STRIP_FILLER_AFTER); + OPT(GRAY_TO_RGB); + OPT(EXPAND_16); + OPT(SCALE_16); + + else + { + fprintf(stderr, "timepng %s: unrecognized transform\n", opt); + usage(fp); + } + } + + /* Handle the files: */ + if (argc > 1 && nfiles > 0) + usage(fp); /* Additional files not valid with --dissemble */ + + else if (argc > 1) + { + int i; + + for (i=1; i 0) + { + if (assembly != NULL) + { + if (fflush(fp) && !ferror(fp) && fclose(fp)) + { + perror(assembly); + fprintf(stderr, "%s: close failed\n", assembly); + } + + else + { + printf("%s %d\n", assembly, nfiles); + fflush(stdout); + ok = !ferror(stdout); + } + } + + else + { + ok = perform_one_test(fp, nfiles, transforms); + (void)fclose(fp); + } + } + + else + usage(fp); + } + + else + (void)fclose(fp); + + /* Exit code 0 on success. */ + return ok == 0; +} +#else /* !sufficient support */ +int main(void) { return 77; } +#endif /* !sufficient support */ diff --git a/extern/libpng/contrib/mips-msa/README b/extern/libpng/contrib/mips-msa/README new file mode 100644 index 0000000000..10acc93646 --- /dev/null +++ b/extern/libpng/contrib/mips-msa/README @@ -0,0 +1,83 @@ +OPERATING SYSTEM SPECIFIC MIPS MSA DETECTION +-------------------------------------------- + +Detection of the ability to execute MIPS MSA on an MIPS processor requires +operating system support. (The information is not available in user mode.) + +HOW TO USE THIS +--------------- + +This directory contains C code fragments that can be included in mips/mips_init.c +by setting the macro PNG_MIPS_MSA_FILE to the file name in "" or <> at build +time. This setting is not recorded in pnglibconf.h and can be changed simply by +rebuilding mips/msa_init.o with the required macro definition. + +For any of this code to be used the MIPS MSA code must be enabled and run time +checks must be supported. I.e.: + +#if PNG_MIPS_MSA_OPT > 0 +#ifdef PNG_MIPS_MSA_CHECK_SUPPORTED + +This is done in a 'configure' build by passing configure the argument: + + --enable-mips-msa=check + +Apart from the basic Linux implementation in contrib/mips-msa/linux.c this code +is unsupported. That means that it is not even compiled on a regular basis and +may be broken in any given minor release. + +FILE FORMAT +----------- + +Each file documents its testing status as of the last time it was tested (which +may have been a long time ago): + +STATUS: one of: + SUPPORTED: This indicates that the file is included in the regularly + performed test builds and bugs are fixed when discovered. + COMPILED: This indicates that the code did compile at least once. See the + more detailed description for the extent to which the result was + successful. + TESTED: This means the code was fully compiled into the libpng test programs + and these were run at least once. + +BUG REPORTS: an email address to which to send reports of problems + +The file is a fragment of C code. It should not define any 'extern' symbols; +everything should be static. It must define the function: + +static int png_have_msa(png_structp png_ptr); + +That function must return 1 if MIPS MSA instructions are supported, 0 if not. +It must not execute png_error unless it detects a bug. A png_error will prevent +the reading of the PNG and in the future, writing too. + +BUG REPORTS +----------- + +If you mail a bug report for any file that is not SUPPORTED there may only be +limited response. Consider fixing it and sending a patch to fix the problem - +this is more likely to result in action. + +CONTRIBUTIONS +------------- + +You may send contributions of new implementations to +png-mng-implement@sourceforge.net. Please write code in strict C90 C where +possible. Obviously OS dependencies are to be expected. If you submit code you +must have the authors permission and it must have a license that is acceptable +to the current maintainer; in particular that license must permit modification +and redistribution. + +Please try to make the contribution a single file and give the file a clear and +unambiguous name that identifies the target OS. If multiple files really are +required put them all in a sub-directory. + +You must also be prepared to handle bug reports from users of the code, either +by joining the png-mng-implement mailing list or by providing an email for the +"BUG REPORTS" entry or both. Please make sure that the header of the file +contains the STATUS and BUG REPORTS fields as above. + +Please list the OS requirements as precisely as possible. Ideally you should +also list the environment in which the code has been tested and certainly list +any environments where you suspect it might not work. diff --git a/extern/libpng/contrib/mips-msa/linux.c b/extern/libpng/contrib/mips-msa/linux.c new file mode 100644 index 0000000000..140215c4ea --- /dev/null +++ b/extern/libpng/contrib/mips-msa/linux.c @@ -0,0 +1,64 @@ +/* contrib/mips-msa/linux.c + * + * Copyright (c) 2016 Glenn Randers-Pehrson + * Written by Mandar Sahastrabuddhe, 2016. + * Last changed in libpng 1.6.25beta03 [August 29, 2016] + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + * + * SEE contrib/mips-msa/README before reporting bugs + * + * STATUS: SUPPORTED + * BUG REPORTS: png-mng-implement@sourceforge.net + * + * png_have_msa implemented for Linux by reading the widely available + * pseudo-file /proc/cpuinfo. + * + * This code is strict ANSI-C and is probably moderately portable; it does + * however use and it assumes that /proc/cpuinfo is never localized. + */ + +#include +#include +#include + +static int +png_have_msa(png_structp png_ptr) +{ + FILE *f = fopen("/proc/cpuinfo", "rb"); + + char *string = "msa"; + char word[10]; + + if (f != NULL) + { + while(!feof(f)) + { + int ch = fgetc(f); + static int i = 0; + + while(!(ch <= 32)) + { + word[i++] = ch; + ch = fgetc(f); + } + + int val = strcmp(string, word); + + if (val == 0) + return 1; + + i = 0; + memset(word, 0, 10); + } + + fclose(f); + } +#ifdef PNG_WARNINGS_SUPPORTED + else + png_warning(png_ptr, "/proc/cpuinfo open failed"); +#endif + return 0; +} diff --git a/extern/libpng/contrib/oss-fuzz/Dockerfile b/extern/libpng/contrib/oss-fuzz/Dockerfile new file mode 100644 index 0000000000..f5bc1a985d --- /dev/null +++ b/extern/libpng/contrib/oss-fuzz/Dockerfile @@ -0,0 +1,25 @@ +# Copyright 2016 Google Inc. +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. +# +################################################################################ + +FROM gcr.io/oss-fuzz-base/base-builder +MAINTAINER glennrp@gmail.com +RUN apt-get update && \ + apt-get install -y make autoconf automake libtool + +RUN git clone --depth 1 https://github.com/madler/zlib.git +RUN git clone --depth 1 https://github.com/glennrp/libpng.git +RUN cp libpng/contrib/oss-fuzz/build.sh $SRC +WORKDIR libpng diff --git a/extern/libpng/contrib/oss-fuzz/README.txt b/extern/libpng/contrib/oss-fuzz/README.txt new file mode 100644 index 0000000000..3b3656fbb6 --- /dev/null +++ b/extern/libpng/contrib/oss-fuzz/README.txt @@ -0,0 +1,37 @@ +Last changed in libpng 1.6.33 [September 28, 2017] +Copyright (c) 2017 Glenn Randers-Pehrson + +This code is released under the libpng license. +For conditions of distribution and use, see the disclaimer +and license in png.h + +Files in this directory are used by the oss-fuzz project +(https://github.com/google/oss-fuzz/tree/master/projects/libpng). +for "fuzzing" libpng. + +They were licensed by Google Inc, using the BSD-like Chromium license, +which may be found at https://cs.chromium.org/chromium/src/LICENSE, or, if +noted in the source, under the Apache-2.0 license, which may +be found at http://www.apache.org/licenses/LICENSE-2.0 . +If they have been modified, the derivatives are copyright Glenn Randers-Pehrson +and are released under the same licenses as the originals. Several of +the original files (libpng_read_fuzzer.options, png.dict, project.yaml) +had no licensing information; we assumed that these were under the Chromium +license. Any new files are released under the libpng license (see png.h). + +The files are + Original + Filename or derived Copyright License + ========================= ========== ================ ========== + Dockerfile* derived 2017, Glenn R-P Apache 2.0 + build.sh derived 2017, Glenn R-P Apache 2.0 + libpng_read_fuzzer.cc derived 2017, Glenn R-P Chromium + libpng_read_fuzzer.options original 2015, Chrome Devs Chromium + png.dict original 2015, Chrome Devs Chromium + README.txt (this file) original 2017, Glenn R-P libpng + + * Dockerfile is a copy of the file used by oss-fuzz. build.sh, + png.dict and libpng_read_fuzzer.* are the actual files used by oss-fuzz, + which retrieves them from the libpng repository at Github. + +To do: exercise the progressive reader and the png encoder. diff --git a/extern/libpng/contrib/oss-fuzz/build.sh b/extern/libpng/contrib/oss-fuzz/build.sh new file mode 100755 index 0000000000..f9e1b0776d --- /dev/null +++ b/extern/libpng/contrib/oss-fuzz/build.sh @@ -0,0 +1,51 @@ +#!/bin/bash -eu +# Copyright 2017-2018 Glenn Randers-Pehrson +# Copyright 2016 Google Inc. +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. +# +# Last changed in libpng 1.6.35 [July 15, 2018] +# +# Revisions by Glenn Randers-Pehrson, 2017: +# 1. Build only the library, not the tools (changed "make -j$(nproc) all" to +# "make -j$(nproc) libpng16.la"). +# 2. Disabled WARNING and WRITE options in pnglibconf.dfa. +# 3. Build zlib alongside libpng +################################################################################ + +# Disable logging via library build configuration control. +cat scripts/pnglibconf.dfa | \ + sed -e "s/option STDIO/option STDIO disabled/" \ + -e "s/option WARNING /option WARNING disabled/" \ + -e "s/option WRITE enables WRITE_INT_FUNCTIONS/option WRITE disabled/" \ +> scripts/pnglibconf.dfa.temp +mv scripts/pnglibconf.dfa.temp scripts/pnglibconf.dfa + +# build the libpng library. +autoreconf -f -i +./configure --with-libpng-prefix=OSS_FUZZ_ +make -j$(nproc) clean +make -j$(nproc) libpng16.la + +# build libpng_read_fuzzer. +$CXX $CXXFLAGS -std=c++11 -I. \ + $SRC/libpng/contrib/oss-fuzz/libpng_read_fuzzer.cc \ + -o $OUT/libpng_read_fuzzer \ + -lFuzzingEngine .libs/libpng16.a -lz + +# add seed corpus. +find $SRC/libpng -name "*.png" | grep -v crashers | \ + xargs zip $OUT/libpng_read_fuzzer_seed_corpus.zip + +cp $SRC/libpng/contrib/oss-fuzz/*.dict \ + $SRC/libpng/contrib/oss-fuzz/*.options $OUT/ diff --git a/extern/libpng/contrib/oss-fuzz/libpng_read_fuzzer.cc b/extern/libpng/contrib/oss-fuzz/libpng_read_fuzzer.cc new file mode 100644 index 0000000000..7b305509cd --- /dev/null +++ b/extern/libpng/contrib/oss-fuzz/libpng_read_fuzzer.cc @@ -0,0 +1,190 @@ + +// libpng_read_fuzzer.cc +// Copyright 2017-2018 Glenn Randers-Pehrson +// Copyright 2015 The Chromium Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that may +// be found in the LICENSE file https://cs.chromium.org/chromium/src/LICENSE + +// Last changed in libpng 1.6.35 [July 15, 2018] + +// The modifications in 2017 by Glenn Randers-Pehrson include +// 1. addition of a PNG_CLEANUP macro, +// 2. setting the option to ignore ADLER32 checksums, +// 3. adding "#include " which is needed on some platforms +// to provide memcpy(). +// 4. adding read_end_info() and creating an end_info structure. +// 5. adding calls to png_set_*() transforms commonly used by browsers. + +#include +#include +#include + +#include + +#define PNG_INTERNAL +#include "png.h" + +#define PNG_CLEANUP \ + if(png_handler.png_ptr) \ + { \ + if (png_handler.row_ptr) \ + png_free(png_handler.png_ptr, png_handler.row_ptr); \ + if (png_handler.end_info_ptr) \ + png_destroy_read_struct(&png_handler.png_ptr, &png_handler.info_ptr,\ + &png_handler.end_info_ptr); \ + else if (png_handler.info_ptr) \ + png_destroy_read_struct(&png_handler.png_ptr, &png_handler.info_ptr,\ + nullptr); \ + else \ + png_destroy_read_struct(&png_handler.png_ptr, nullptr, nullptr); \ + png_handler.png_ptr = nullptr; \ + png_handler.row_ptr = nullptr; \ + png_handler.info_ptr = nullptr; \ + png_handler.end_info_ptr = nullptr; \ + } + +struct BufState { + const uint8_t* data; + size_t bytes_left; +}; + +struct PngObjectHandler { + png_infop info_ptr = nullptr; + png_structp png_ptr = nullptr; + png_infop end_info_ptr = nullptr; + png_voidp row_ptr = nullptr; + BufState* buf_state = nullptr; + + ~PngObjectHandler() { + if (row_ptr) + png_free(png_ptr, row_ptr); + if (end_info_ptr) + png_destroy_read_struct(&png_ptr, &info_ptr, &end_info_ptr); + else if (info_ptr) + png_destroy_read_struct(&png_ptr, &info_ptr, nullptr); + else + png_destroy_read_struct(&png_ptr, nullptr, nullptr); + delete buf_state; + } +}; + +void user_read_data(png_structp png_ptr, png_bytep data, size_t length) { + BufState* buf_state = static_cast(png_get_io_ptr(png_ptr)); + if (length > buf_state->bytes_left) { + png_error(png_ptr, "read error"); + } + memcpy(data, buf_state->data, length); + buf_state->bytes_left -= length; + buf_state->data += length; +} + +static const int kPngHeaderSize = 8; + +// Entry point for LibFuzzer. +// Roughly follows the libpng book example: +// http://www.libpng.org/pub/png/book/chapter13.html +extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) { + if (size < kPngHeaderSize) { + return 0; + } + + std::vector v(data, data + size); + if (png_sig_cmp(v.data(), 0, kPngHeaderSize)) { + // not a PNG. + return 0; + } + + PngObjectHandler png_handler; + png_handler.png_ptr = nullptr; + png_handler.row_ptr = nullptr; + png_handler.info_ptr = nullptr; + png_handler.end_info_ptr = nullptr; + + png_handler.png_ptr = png_create_read_struct + (PNG_LIBPNG_VER_STRING, nullptr, nullptr, nullptr); + if (!png_handler.png_ptr) { + return 0; + } + + png_handler.info_ptr = png_create_info_struct(png_handler.png_ptr); + if (!png_handler.info_ptr) { + PNG_CLEANUP + return 0; + } + + png_handler.end_info_ptr = png_create_info_struct(png_handler.png_ptr); + if (!png_handler.end_info_ptr) { + PNG_CLEANUP + return 0; + } + + png_set_crc_action(png_handler.png_ptr, PNG_CRC_QUIET_USE, PNG_CRC_QUIET_USE); +#ifdef PNG_IGNORE_ADLER32 + png_set_option(png_handler.png_ptr, PNG_IGNORE_ADLER32, PNG_OPTION_ON); +#endif + + // Setting up reading from buffer. + png_handler.buf_state = new BufState(); + png_handler.buf_state->data = data + kPngHeaderSize; + png_handler.buf_state->bytes_left = size - kPngHeaderSize; + png_set_read_fn(png_handler.png_ptr, png_handler.buf_state, user_read_data); + png_set_sig_bytes(png_handler.png_ptr, kPngHeaderSize); + + if (setjmp(png_jmpbuf(png_handler.png_ptr))) { + PNG_CLEANUP + return 0; + } + + // Reading. + png_read_info(png_handler.png_ptr, png_handler.info_ptr); + + // reset error handler to put png_deleter into scope. + if (setjmp(png_jmpbuf(png_handler.png_ptr))) { + PNG_CLEANUP + return 0; + } + + png_uint_32 width, height; + int bit_depth, color_type, interlace_type, compression_type; + int filter_type; + + if (!png_get_IHDR(png_handler.png_ptr, png_handler.info_ptr, &width, + &height, &bit_depth, &color_type, &interlace_type, + &compression_type, &filter_type)) { + PNG_CLEANUP + return 0; + } + + // This is going to be too slow. + if (width && height > 100000000 / width) { + PNG_CLEANUP + return 0; + } + + // Set several transforms that browsers typically use: + png_set_gray_to_rgb(png_handler.png_ptr); + png_set_expand(png_handler.png_ptr); + png_set_packing(png_handler.png_ptr); + png_set_scale_16(png_handler.png_ptr); + png_set_tRNS_to_alpha(png_handler.png_ptr); + + int passes = png_set_interlace_handling(png_handler.png_ptr); + + png_read_update_info(png_handler.png_ptr, png_handler.info_ptr); + + png_handler.row_ptr = png_malloc( + png_handler.png_ptr, png_get_rowbytes(png_handler.png_ptr, + png_handler.info_ptr)); + + for (int pass = 0; pass < passes; ++pass) { + for (png_uint_32 y = 0; y < height; ++y) { + png_read_row(png_handler.png_ptr, + static_cast(png_handler.row_ptr), nullptr); + } + } + + png_read_end(png_handler.png_ptr, png_handler.end_info_ptr); + + PNG_CLEANUP + return 0; +} diff --git a/extern/libpng/contrib/oss-fuzz/libpng_read_fuzzer.options b/extern/libpng/contrib/oss-fuzz/libpng_read_fuzzer.options new file mode 100644 index 0000000000..2005291a0f --- /dev/null +++ b/extern/libpng/contrib/oss-fuzz/libpng_read_fuzzer.options @@ -0,0 +1,2 @@ +[libfuzzer] +dict = png.dict diff --git a/extern/libpng/contrib/oss-fuzz/png.dict b/extern/libpng/contrib/oss-fuzz/png.dict new file mode 100644 index 0000000000..3a8a113830 --- /dev/null +++ b/extern/libpng/contrib/oss-fuzz/png.dict @@ -0,0 +1,39 @@ +# +# AFL dictionary for PNG images +# ----------------------------- +# +# Just the basic, standard-originating sections; does not include vendor +# extensions. +# +# Created by Michal Zalewski +# + +header_png="\x89PNG\x0d\x0a\x1a\x0a" + +section_IDAT="IDAT" +section_IEND="IEND" +section_IHDR="IHDR" +section_PLTE="PLTE" +section_bKGD="bKGD" +section_cHRM="cHRM" +section_eXIf="eXIf" +section_fRAc="fRAc" +section_gAMA="gAMA" +section_gIFg="gIFg" +section_gIFt="gIFt" +section_gIFx="gIFx" +section_hIST="hIST" +section_iCCP="iCCP" +section_iTXt="iTXt" +section_oFFs="oFFs" +section_pCAL="pCAL" +section_pHYs="pHYs" +section_sBIT="sBIT" +section_sCAL="sCAL" +section_sPLT="sPLT" +section_sRGB="sRGB" +section_sTER="sTER" +section_tEXt="tEXt" +section_tIME="tIME" +section_tRNS="tRNS" +section_zTXt="zTXt" diff --git a/extern/libpng/include/contrib/pngminim/README b/extern/libpng/contrib/pngminim/README similarity index 99% rename from extern/libpng/include/contrib/pngminim/README rename to extern/libpng/contrib/pngminim/README index 51d5a3c230..e17fe35b6a 100644 --- a/extern/libpng/include/contrib/pngminim/README +++ b/extern/libpng/contrib/pngminim/README @@ -1,3 +1,4 @@ + This demonstrates the use of PNG_USER_CONFIG, pngusr.h and pngusr.dfa to build minimal decoder, encoder, and progressive reader applications. diff --git a/extern/libpng/include/contrib/pngminim/decoder/README b/extern/libpng/contrib/pngminim/decoder/README similarity index 100% rename from extern/libpng/include/contrib/pngminim/decoder/README rename to extern/libpng/contrib/pngminim/decoder/README diff --git a/extern/libpng/include/contrib/pngminim/decoder/makefile b/extern/libpng/contrib/pngminim/decoder/makefile similarity index 90% rename from extern/libpng/include/contrib/pngminim/decoder/makefile rename to extern/libpng/contrib/pngminim/decoder/makefile index e10e1225d6..4acf3c1779 100644 --- a/extern/libpng/include/contrib/pngminim/decoder/makefile +++ b/extern/libpng/contrib/pngminim/decoder/makefile @@ -14,7 +14,8 @@ LD=$(CC) RM=rm -f COPY=cp -CFLAGS=-DPNG_USER_CONFIG -DNO_GZCOMPRESS -DNO_GZIP -I. -O1 +CPPFLAGS=-I. -DPNG_USER_CONFIG -DNO_GZCOMPRESS -DZ_SOLO -DNO_GZIP +CFLAGS=-O1 -Wall C=.c O=.o @@ -81,7 +82,7 @@ OBJS = $(PROGOBJS) $(PNGOBJS) $(ZOBJS) # note: dependencies do not work on implicit rule lines .c$(O): - $(CC) -c $(CFLAGS) $< + $(CC) -c $(CPPFLAGS) $(CFLAGS) $< # dependencies @@ -95,16 +96,16 @@ pngm2pnm$(E): $(OBJS) # The CPP_FLAGS setting causes pngusr.h to be included in # both the build of pnglibconf.h and, subsequently, when # building libpng itself. -$(PNGCONF): $(PNGSRC)/scripts/pnglibconf.mak\ +$(PNGCONF): $(PNGSRC)/scripts/pnglibconf.mak $(ZH)\ $(PNGSRC)/scripts/pnglibconf.dfa \ $(PNGSRC)/scripts/options.awk pngusr.h pngusr.dfa $(RM) pnglibconf.h pnglibconf.dfn - $(MAKE) $(MAKEFLAGS) -f $(PNGSRC)/scripts/pnglibconf.mak\ - srcdir=$(PNGSRC) CPPFLAGS="-DPNG_USER_CONFIG"\ + $(MAKE) -f $(PNGSRC)/scripts/pnglibconf.mak $(MAKEFLAGS)\ + srcdir=$(PNGSRC) CPPFLAGS="-DPNG_USER_CONFIG -I."\ DFA_XTRA="pngusr.dfa" $@ clean: - $(MAKE) $(MAKEFLAGS) -f $(PNGSRC)/scripts/pnglibconf.mak\ + $(MAKE) -f $(PNGSRC)/scripts/pnglibconf.mak $(MAKEFLAGS)\ srcdir=$(PNGSRC) clean $(RM) pngm2pnm$(O) $(RM) pngm2pnm$(E) diff --git a/extern/libpng/include/contrib/pngminim/decoder/pngusr.dfa b/extern/libpng/contrib/pngminim/decoder/pngusr.dfa similarity index 93% rename from extern/libpng/include/contrib/pngminim/decoder/pngusr.dfa rename to extern/libpng/contrib/pngminim/decoder/pngusr.dfa index 70d528bc9f..4f402721ab 100644 --- a/extern/libpng/include/contrib/pngminim/decoder/pngusr.dfa +++ b/extern/libpng/contrib/pngminim/decoder/pngusr.dfa @@ -1,6 +1,6 @@ # pngminim/decoder/pngusr.dfa # -# Copyright (c) 2010-2011 Glenn Randers-Pehrson +# Copyright (c) 2010-2013 Glenn Randers-Pehrson # # This code is released under the libpng license. # For conditions of distribution and use, see the disclaimer @@ -37,3 +37,4 @@ option SETJMP on option STDIO on option READ_EXPAND on option READ_STRIP_16_TO_8 on +option USER_LIMITS on diff --git a/extern/libpng/include/contrib/pngminim/decoder/pngusr.h b/extern/libpng/contrib/pngminim/decoder/pngusr.h similarity index 88% rename from extern/libpng/include/contrib/pngminim/decoder/pngusr.h rename to extern/libpng/contrib/pngminim/decoder/pngusr.h index 9d9c50c407..cbd7890c7d 100644 --- a/extern/libpng/include/contrib/pngminim/decoder/pngusr.h +++ b/extern/libpng/contrib/pngminim/decoder/pngusr.h @@ -1,6 +1,6 @@ /* minrdpngconf.h: headers to make a minimal png-read-only library * - * Copyright (c) 2007, 2010-2011 Glenn Randers-Pehrson + * Copyright (c) 2007, 2010-2013 Glenn Randers-Pehrson * * This code is released under the libpng license. * For conditions of distribution and use, see the disclaimer @@ -18,7 +18,6 @@ * affect the API (so are not recorded in pnglibconf.h) */ -#define PNG_NO_WARNINGS #define PNG_ALIGN_TYPE PNG_ALIGN_NONE #endif /* MINRDPNGCONF_H */ diff --git a/extern/libpng/include/contrib/pngminim/encoder/README b/extern/libpng/contrib/pngminim/encoder/README similarity index 81% rename from extern/libpng/include/contrib/pngminim/encoder/README rename to extern/libpng/contrib/pngminim/encoder/README index ff9aa4597a..d8d9a6466e 100644 --- a/extern/libpng/include/contrib/pngminim/encoder/README +++ b/extern/libpng/contrib/pngminim/encoder/README @@ -1,6 +1,6 @@ This demonstrates the use of PNG_USER_CONFIG and pngusr.h -The makefile builds a minimal write-only decoder with embedded libpng +The makefile builds a minimal write-only encoder with embedded libpng and zlib. Specify the location of the zlib source (1.2.1 or later) as ZLIBSRC diff --git a/extern/libpng/include/contrib/pngminim/encoder/makefile b/extern/libpng/contrib/pngminim/encoder/makefile similarity index 90% rename from extern/libpng/include/contrib/pngminim/encoder/makefile rename to extern/libpng/contrib/pngminim/encoder/makefile index d6f39e2ea0..41b205c284 100644 --- a/extern/libpng/include/contrib/pngminim/encoder/makefile +++ b/extern/libpng/contrib/pngminim/encoder/makefile @@ -14,7 +14,8 @@ LD=$(CC) RM=rm -f COPY=cp -CFLAGS=-DPNG_USER_CONFIG -DNO_GZIP -I. -O1 +CPPFLAGS=-I. -DPNG_USER_CONFIG -DNO_GZCOMPRESS -DZ_SOLO -DNO_GZIP +CFLAGS=-O1 -Wall C=.c O=.o @@ -80,7 +81,7 @@ OBJS = $(PROGOBJS) $(PNGOBJS) $(ZOBJS) # implicit make rules ------------------------------------------------------- .c$(O): - $(CC) -c $(CFLAGS) $< + $(CC) -c $(CPPFLAGS) $(CFLAGS) $< # dependencies @@ -94,16 +95,16 @@ pnm2pngm$(E): $(OBJS) # The CPP_FLAGS setting causes pngusr.h to be included in # both the build of pnglibconf.h and, subsequently, when # building libpng itself. -$(PNGCONF): $(PNGSRC)/scripts/pnglibconf.mak\ +$(PNGCONF): $(PNGSRC)/scripts/pnglibconf.mak $(ZH)\ $(PNGSRC)/scripts/pnglibconf.dfa \ $(PNGSRC)/scripts/options.awk pngusr.h pngusr.dfa $(RM) pnglibconf.h pnglibconf.dfn - $(MAKE) $(MAKEFLAGS) -f $(PNGSRC)/scripts/pnglibconf.mak\ - srcdir=$(PNGSRC) CPPFLAGS="-DPNG_USER_CONFIG"\ + $(MAKE) -f $(PNGSRC)/scripts/pnglibconf.mak $(MAKEFLAGS)\ + srcdir=$(PNGSRC) CPPFLAGS="-DPNG_USER_CONFIG -I."\ DFA_XTRA="pngusr.dfa" $@ clean: - $(MAKE) $(MAKEFLAGS) -f $(PNGSRC)/scripts/pnglibconf.mak\ + $(MAKE) -f $(PNGSRC)/scripts/pnglibconf.mak $(MAKEFLAGS)\ srcdir=$(PNGSRC) clean $(RM) pnm2pngm$(O) $(RM) pnm2pngm$(E) diff --git a/extern/libpng/include/contrib/pngminim/encoder/pngusr.dfa b/extern/libpng/contrib/pngminim/encoder/pngusr.dfa similarity index 84% rename from extern/libpng/include/contrib/pngminim/encoder/pngusr.dfa rename to extern/libpng/contrib/pngminim/encoder/pngusr.dfa index ee88443c9d..1fc24f3f2a 100644 --- a/extern/libpng/include/contrib/pngminim/encoder/pngusr.dfa +++ b/extern/libpng/contrib/pngminim/encoder/pngusr.dfa @@ -1,6 +1,6 @@ # pngminim/encoder/pngusr.dfa # -# Copyright (c) 2010-2011 Glenn Randers-Pehrson +# Copyright (c) 2010-2013 Glenn Randers-Pehrson # # This code is released under the libpng license. # For conditions of distribution and use, see the disclaimer @@ -14,6 +14,10 @@ everything = off option WRITE on +# These 2 options are required if you need to read PBM (P1 or P4) files. +option WRITE_INVERT on +option WRITE_PACK on + # You must choose fixed or floating point arithmetic: # option FLOATING_POINT on diff --git a/extern/libpng/include/contrib/pngminim/encoder/pngusr.h b/extern/libpng/contrib/pngminim/encoder/pngusr.h similarity index 88% rename from extern/libpng/include/contrib/pngminim/encoder/pngusr.h rename to extern/libpng/contrib/pngminim/encoder/pngusr.h index 2033aadb20..997d44fe90 100644 --- a/extern/libpng/include/contrib/pngminim/encoder/pngusr.h +++ b/extern/libpng/contrib/pngminim/encoder/pngusr.h @@ -1,6 +1,6 @@ /* minwrpngconf.h: headers to make a minimal png-write-only library * - * Copyright (c) 2007, 2010-2011 Glenn Randers-Pehrson + * Copyright (c) 2007, 2010-2013 Glenn Randers-Pehrson * * This code is released under the libpng license. * For conditions of distribution and use, see the disclaimer @@ -18,7 +18,6 @@ * affect the API (so are not recorded in pnglibconf.h) */ -#define PNG_NO_WARNINGS #define PNG_ALIGN_TYPE PNG_ALIGN_NONE #endif /* MINWRPNGCONF_H */ diff --git a/extern/libpng/include/contrib/pngminim/preader/README b/extern/libpng/contrib/pngminim/preader/README similarity index 100% rename from extern/libpng/include/contrib/pngminim/preader/README rename to extern/libpng/contrib/pngminim/preader/README diff --git a/extern/libpng/include/contrib/pngminim/preader/makefile b/extern/libpng/contrib/pngminim/preader/makefile similarity index 91% rename from extern/libpng/include/contrib/pngminim/preader/makefile rename to extern/libpng/contrib/pngminim/preader/makefile index f4b0ccdc8a..b625199114 100644 --- a/extern/libpng/include/contrib/pngminim/preader/makefile +++ b/extern/libpng/contrib/pngminim/preader/makefile @@ -30,7 +30,8 @@ XLIB = -L/usr/X11R6/lib -lX11 #LIBS = $(XLIB) LIBS = $(XLIB) -lm #platforms that need libm -CFLAGS=-DPNG_USER_CONFIG -DNO_GZCOMPRESS -DNO_GZIP -I. $(XINC) -O1 +CPPFLAGS=-I. $(XINC) -DPNG_USER_CONFIG -DNO_GZCOMPRESS -DZ_SOLO -DNO_GZIP +CFLAGS=-O1 -Wall C=.c O=.o @@ -96,7 +97,7 @@ OBJS = $(PROGOBJS) $(PNGOBJS) $(ZOBJS) # implicit make rules ------------------------------------------------------- .c$(O): - $(CC) -c $(CFLAGS) $< + $(CC) -c $(CPPFLAGS) $(CFLAGS) $< # dependencies @@ -110,16 +111,16 @@ rpng2-x$(E): $(OBJS) # The CPP_FLAGS setting causes pngusr.h to be included in # both the build of pnglibconf.h and, subsequently, when # building libpng itself. -$(PNGCONF): $(PNGSRC)/scripts/pnglibconf.mak\ +$(PNGCONF): $(PNGSRC)/scripts/pnglibconf.mak $(ZH)\ $(PNGSRC)/scripts/pnglibconf.dfa \ $(PNGSRC)/scripts/options.awk pngusr.h pngusr.dfa $(RM) pnglibconf.h pnglibconf.dfn - $(MAKE) $(MAKEFLAGS) -f $(PNGSRC)/scripts/pnglibconf.mak\ - srcdir=$(PNGSRC) CPPFLAGS="-DPNG_USER_CONFIG"\ + $(MAKE) -f $(PNGSRC)/scripts/pnglibconf.mak $(MAKEFLAGS)\ + srcdir=$(PNGSRC) CPPFLAGS="-DPNG_USER_CONFIG -I."\ DFA_XTRA="pngusr.dfa" $@ clean: - $(MAKE) $(MAKEFLAGS) -f $(PNGSRC)/scripts/pnglibconf.mak\ + $(MAKE) -f $(PNGSRC)/scripts/pnglibconf.mak $(MAKEFLAGS)\ srcdir=$(PNGSRC) clean $(RM) rpng2-x$(O) $(RM) rpng2-x$(E) diff --git a/extern/libpng/include/contrib/pngminim/preader/pngusr.dfa b/extern/libpng/contrib/pngminim/preader/pngusr.dfa similarity index 95% rename from extern/libpng/include/contrib/pngminim/preader/pngusr.dfa rename to extern/libpng/contrib/pngminim/preader/pngusr.dfa index 216c421ca6..ac297f41bd 100644 --- a/extern/libpng/include/contrib/pngminim/preader/pngusr.dfa +++ b/extern/libpng/contrib/pngminim/preader/pngusr.dfa @@ -1,6 +1,6 @@ # pngminim/preader/pngusr.dfa # -# Copyright (c) 2010-2011 Glenn Randers-Pehrson +# Copyright (c) 2010-2013 Glenn Randers-Pehrson # # This code is released under the libpng license. # For conditions of distribution and use, see the disclaimer diff --git a/extern/libpng/include/contrib/pngminim/preader/pngusr.h b/extern/libpng/contrib/pngminim/preader/pngusr.h similarity index 88% rename from extern/libpng/include/contrib/pngminim/preader/pngusr.h rename to extern/libpng/contrib/pngminim/preader/pngusr.h index 73cfecfbf0..80db3bb171 100644 --- a/extern/libpng/include/contrib/pngminim/preader/pngusr.h +++ b/extern/libpng/contrib/pngminim/preader/pngusr.h @@ -1,6 +1,6 @@ /* minrdpngconf.h: headers to make a minimal png-read-only library * - * Copyright (c) 2009, 2010-2011 Glenn Randers-Pehrson + * Copyright (c) 2009, 2010-2013 Glenn Randers-Pehrson * * This code is released under the libpng license. * For conditions of distribution and use, see the disclaimer @@ -18,7 +18,6 @@ * affect the API (so are not recorded in pnglibconf.h) */ -#define PNG_NO_WARNINGS #define PNG_ALIGN_TYPE PNG_ALIGN_NONE #endif /* MINPRDPNGCONF_H */ diff --git a/extern/libpng/contrib/pngminus/CHANGES.txt b/extern/libpng/contrib/pngminus/CHANGES.txt new file mode 100644 index 0000000000..4e64e5ee61 --- /dev/null +++ b/extern/libpng/contrib/pngminus/CHANGES.txt @@ -0,0 +1,13 @@ + +pnm2png / png2pnm --- conversion from PBM/PGM/PPM-file to PNG-file +copyright (C) 1999-2019 by Willem van Schaik + +version 1.0 - 1999.10.15 - First version. + 1.1 - 2015.07.29 - Fixed leaks (Glenn Randers-Pehrson) + 1.2 - 2017.04.22 - Add buffer-size check + 1.3 - 2017.08.24 - Fix potential overflow in buffer-size check + (Glenn Randers-Pehrson) + 1.4 - 2017.08.28 - Add PNGMINUS_UNUSED (Christian Hesse) + 1.5 - 2018.08.05 - Fix buffer overflow in tokenizer (Cosmin Truta) + 1.6 - 2018.08.05 - Improve portability and fix style (Cosmin Truta) + 1.7 - 2019.01.22 - Change license to MIT (Willem van Schaik) diff --git a/extern/libpng/contrib/pngminus/CMakeLists.txt b/extern/libpng/contrib/pngminus/CMakeLists.txt new file mode 100644 index 0000000000..1f815a5825 --- /dev/null +++ b/extern/libpng/contrib/pngminus/CMakeLists.txt @@ -0,0 +1,24 @@ +cmake_minimum_required(VERSION 3.1) +cmake_policy(VERSION 3.1) + +project(PNGMINUS C) + +option(PNGMINUS_USE_STATIC_LIBRARIES "Use the static library builds" ON) + +# libpng +add_subdirectory(../.. libpng) +include_directories(${CMAKE_CURRENT_SOURCE_DIR}/../..) +include_directories(${CMAKE_CURRENT_BINARY_DIR}/libpng) +if(PNGMINUS_USE_STATIC_LIBRARIES) + set(PNGMINUS_PNG_LIBRARY png_static) +else() + set(PNGMINUS_PNG_LIBRARY png) +endif() + +# png2pnm +add_executable(png2pnm png2pnm.c) +target_link_libraries(png2pnm ${PNGMINUS_PNG_LIBRARY}) + +# pnm2png +add_executable(pnm2png pnm2png.c) +target_link_libraries(pnm2png ${PNGMINUS_PNG_LIBRARY}) diff --git a/extern/libpng/contrib/pngminus/LICENSE.txt b/extern/libpng/contrib/pngminus/LICENSE.txt new file mode 100644 index 0000000000..00878a9a60 --- /dev/null +++ b/extern/libpng/contrib/pngminus/LICENSE.txt @@ -0,0 +1,22 @@ + +pnm2png / png2pnm --- conversion from PBM/PGM/PPM-file to PNG-file + +copyright (C) 1999-2019 by Willem van Schaik + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +The software is provided "as is", without warranty of any kind, express or +implied, including but not limited to the warranties of merchantability, +fitness for a particular purpose and noninfringement. In no event shall the +authors or copyight holders be liable for any claim, damages or other +liability, whether in an action of contract, tort or otherwise, arising from, +out of or in connection with the software or the use or other dealings in the +software. diff --git a/extern/libpng/contrib/pngminus/Makefile b/extern/libpng/contrib/pngminus/Makefile new file mode 100644 index 0000000000..4bba079611 --- /dev/null +++ b/extern/libpng/contrib/pngminus/Makefile @@ -0,0 +1,62 @@ +# Makefile for PngMinus (png2pnm and pnm2png) +# Linux / Unix + +#CC = cc +CC = gcc +LD = $(CC) + +RM = rm -f + +PNGINC = -I../.. +PNGLIB_SHARED = -L../.. -lpng +PNGLIB_STATIC = ../../libpng.a + +# Uncomment the following if you have a custom zlib build at ../../../zlib +#ZINC = -I../../../zlib +#ZLIB_SHARED = -L../../../zlib -lz +#ZLIB_STATIC = ../../../zlib/libz.a + +# Use the system zlib otherwise +ZLIB_SHARED = -lz +ZLIB_STATIC = -lz + +CPPFLAGS = $(PNGINC) $(ZINC) +CFLAGS = +LDFLAGS = +LIBS_SHARED = $(PNGLIB_SHARED) $(ZLIB_SHARED) +LIBS_STATIC = $(PNGLIB_STATIC) $(ZLIB_STATIC) + +EXEEXT = +#EXEEXT = .exe + +# dependencies + +all: png2pnm$(EXEEXT) pnm2png$(EXEEXT) png2pnm-static$(EXEEXT) pnm2png-static$(EXEEXT) + +png2pnm.o: png2pnm.c + $(CC) -c $(CPPFLAGS) $(CFLAGS) png2pnm.c + +pnm2png.o: pnm2png.c + $(CC) -c $(CPPFLAGS) $(CFLAGS) pnm2png.c + +png2pnm$(EXEEXT): png2pnm.o + $(LD) $(LDFLAGS) -o png2pnm$(EXEEXT) png2pnm.o $(LIBS_SHARED) -lm + +pnm2png$(EXEEXT): pnm2png.o + $(LD) $(LDFLAGS) -o pnm2png$(EXEEXT) pnm2png.o $(LIBS_SHARED) -lm + +png2pnm-static$(EXEEXT): png2pnm.o + $(LD) $(LDFLAGS) -o png2pnm-static$(EXEEXT) png2pnm.o $(LIBS_STATIC) -lm + +pnm2png-static$(EXEEXT): pnm2png.o + $(LD) $(LDFLAGS) -o pnm2png-static$(EXEEXT) pnm2png.o $(LIBS_STATIC) -lm + +clean: + $(RM) png2pnm.o + $(RM) pnm2png.o + $(RM) png2pnm$(EXEEXT) + $(RM) pnm2png$(EXEEXT) + $(RM) png2pnm-static$(EXEEXT) + $(RM) pnm2png-static$(EXEEXT) + +# End of makefile for png2pnm / pnm2png diff --git a/extern/libpng/include/contrib/pngminus/README b/extern/libpng/contrib/pngminus/README.txt similarity index 61% rename from extern/libpng/include/contrib/pngminus/README rename to extern/libpng/contrib/pngminus/README.txt index bbe7407ecc..f7f6ecb3a5 100644 --- a/extern/libpng/include/contrib/pngminus/README +++ b/extern/libpng/contrib/pngminus/README.txt @@ -1,26 +1,16 @@ PngMinus -------- -(copyright Willem van Schaik, 1999) +(copyright Willem van Schaik, 1999-2019) -License -------- - -Permission to use, copy, modify, and distribute this software and -its documentation for any purpose and without fee is hereby granted, -provided that the above copyright notice appear in all copies and -that both that copyright notice and this permission notice appear in -supporting documentation. This software is provided "as is" without -express or implied warranty. - Some history ------------ Soon after the creation of PNG in 1995, the need was felt for a set of -pnmtopng / pngtopnm utilities. Independantly Alexander Lehmann and I +pnmtopng / pngtopnm utilities. Independently Alexander Lehmann and I (Willem van Schaik) started such a project. Luckily we discovered this -and merged the two together into pnmtopng.tar.gz, which is available -from a/o ftp://ftp.simplesystems.org/pub/libpng/png/. +and merged the two, which later became part of NetPBM, available from +SourceForge. These two utilities have many, many options and make use of most of the features of PNG, like gamma, alpha, sbit, text-chunks, etc. This makes @@ -35,8 +25,8 @@ makes the whole setup a bit bulky. But that's unavoidable given the many features of pnmtopng. -What now --------- +What now (1999) +--------------- At this moment libpng is in a very stable state and can do much of the work done in pnmtopng. Also, pnmtopng needs to be upgraded to the new interface of libpng. Hence, it is time for a rewrite from the ground up @@ -49,8 +39,8 @@ a small prototype that contains only the basic functionality. It doesn't have any of the options to read or write special chunks and it will do no gamma correction. But this makes it also a simple program that is quite easy to understand and can serve well as a template for other -software developments. (By now there are of course a couple of programs, -like Greg Roelofs' rpng/wpng, that can be used just as good.) +software developments. By now there are of course a couple of programs, +like Greg Roelofs' rpng/wpng, that can be used just as good. Can and can not @@ -60,7 +50,8 @@ PngMinus. Because I started this development in good-old Turbo-C, I avoided the use the netpbm library, which requires DOS extenders. Again, another reason to call it PngMinus (minus netpbm :-). So, part of the program are some elementary routines to read / write pgm- and ppm-files. -It does not read b&w pbm-files. +It does not handle B&W pbm-files, but instead you could do pgm with bit- +depth 1. The downside of this approach is that you can not use them on images that require blocks of memory bigger than 64k (the DOS version). For @@ -96,58 +87,34 @@ To list the options type "png2pnm -h" or "pnm2png -h". Just like Scandinavian furniture -------------------------------- -You have to put it together yourself. I did test the software under -MS-DOS with Turbo-C 3.0 and under RedHat Linux 4.2 with gcc. In both -cases I used libpng-1.0.4 and zlib-1.1.3. Later versions should be OK, -however some older libpng versions have a bug in pngmem.c when using -Turbo-C 3.0 (see below). +You have to put it together yourself. I developed the software on MS-DOS +with Turbo-C 3.0 and RedHat Linux 4.2 with gcc. In both cases I used +libpng-1.0.4 and zlib-1.1.3. By now (2019) it is twenty years later and +more current versions are OK. -You can build it using one of the two makefiles (make -f makefile.###) -or use the batch/script files pngminus.bat / pngminus.sh. This assumes -that you have built the libraries in ../libpng and ../zlib. Using Linux, -make sure that you have built libpng with makefile.std and not -makefile.linux (also called .lnx in earlier versions of libpng). The -latter creates a .so shared-library, while the PngMinus makefile assumes -a normal .a static library. +The makefile assumes that the libpng libraries can be found in ../.. and +libz in ../../../zlib. But you can change this to for example ../libpng +and ../zlib. The makefile creates two versions of each program, one with +static library support and the other using shared libraries. If you create a ../pngsuite directory and then store the basn####.png files from PngSuite (http://www.schaik.com/pngsuite/) in there, you can -test in one go the proper functioning of PngMinus, see png2pnm.bat and -pnm2png.bat (or the .sh versions). +test the proper functioning of PngMinus by running pngminus.sh. Warranty ------- Please, remember that this was just a small experiment to learn a few -things. It will have many unforeseen features . Who said bugs? Use -it when you are in need for something simple or when you want to start -developing your own stuff. - - -The Turbo bug -------------- -** pngmem.old - hptr = (png_byte huge *)((long)(hptr) & 0xfffffff0L); - hptr += 16L; -** pngmem.c - hptr = (png_byte huge *)((long)(hptr) & 0xfffffff0L); - hptr = hptr + 16L; -** - -** pngmem.old - png_ptr->offset_table_ptr[i] = (png_bytep)hptr; - hptr += (png_uint_32)65536L; -** pngmem.c - png_ptr->offset_table_ptr[i] = (png_bytep)hptr; - hptr = hptr + 65536L; -** +things. It will have many unforeseen features ... who said bugs? Use +it when you are in need for something simple or when you want a starting +point for developing your own stuff. The end ------- Willem van Schaik -mailto:willem@schaik.com +mailto:willem at schaik dot com http://www.schaik.com/png/ -------- -Oct 1999 + +Oct 1999, Jan 2019 diff --git a/extern/libpng/include/contrib/pngminus/makevms.com b/extern/libpng/contrib/pngminus/makevms.com similarity index 100% rename from extern/libpng/include/contrib/pngminus/makevms.com rename to extern/libpng/contrib/pngminus/makevms.com diff --git a/extern/libpng/include/contrib/pngminus/png2pnm.bat b/extern/libpng/contrib/pngminus/png2pnm.bat old mode 100644 new mode 100755 similarity index 98% rename from extern/libpng/include/contrib/pngminus/png2pnm.bat rename to extern/libpng/contrib/pngminus/png2pnm.bat index 449cf36750..a2798c3403 --- a/extern/libpng/include/contrib/pngminus/png2pnm.bat +++ b/extern/libpng/contrib/pngminus/png2pnm.bat @@ -7,7 +7,7 @@ png2pnm.exe -noraw ..\pngsuite\basn0g16.png basn0g16.pgm REM -- full-color png2pnm.exe -noraw ..\pngsuite\basn2c08.png basn2c08.ppm png2pnm.exe -noraw ..\pngsuite\basn2c16.png basn2c16.ppm -REM -- palletted +REM -- paletted png2pnm.exe -noraw ..\pngsuite\basn3p01.png basn3p01.ppm png2pnm.exe -noraw ..\pngsuite\basn3p02.png basn3p02.ppm png2pnm.exe -noraw ..\pngsuite\basn3p04.png basn3p04.ppm @@ -27,7 +27,7 @@ png2pnm.exe -raw ..\pngsuite\basn0g16.png rawn0g16.pgm REM -- full-color png2pnm.exe -raw ..\pngsuite\basn2c08.png rawn2c08.ppm png2pnm.exe -raw ..\pngsuite\basn2c16.png rawn2c16.ppm -REM -- palletted +REM -- paletted png2pnm.exe -raw ..\pngsuite\basn3p01.png rawn3p01.ppm png2pnm.exe -raw ..\pngsuite\basn3p02.png rawn3p02.ppm png2pnm.exe -raw ..\pngsuite\basn3p04.png rawn3p04.ppm diff --git a/extern/libpng/include/contrib/pngminus/png2pnm.c b/extern/libpng/contrib/pngminus/png2pnm.c similarity index 72% rename from extern/libpng/include/contrib/pngminus/png2pnm.c rename to extern/libpng/contrib/pngminus/png2pnm.c index 2281429435..5fef7ed142 100644 --- a/extern/libpng/include/contrib/pngminus/png2pnm.c +++ b/extern/libpng/contrib/pngminus/png2pnm.c @@ -1,23 +1,14 @@ /* * png2pnm.c --- conversion from PNG-file to PGM/PPM-file - * copyright (C) 1999 by Willem van Schaik + * copyright (C) 1999-2019 by Willem van Schaik * - * version 1.0 - 1999.10.15 - First version. - * - * Permission to use, copy, modify, and distribute this software and - * its documentation for any purpose and without fee is hereby granted, - * provided that the above copyright notice appear in all copies and - * that both that copyright notice and this permission notice appear in - * supporting documentation. This software is provided "as is" without - * express or implied warranty. + * This software is released under the MIT license. For conditions of + * distribution and use, see the LICENSE file part of this package. */ #include #include -#ifdef __TURBOC__ -#include #include -#endif #ifndef BOOL #define BOOL unsigned char @@ -29,35 +20,25 @@ #define FALSE (BOOL) 0 #endif -#ifdef __TURBOC__ -#define STDIN 0 -#define STDOUT 1 -#define STDERR 2 -#endif - -/* to make png2pnm verbose so we can find problems (needs to be before png.h) */ +/* make png2pnm verbose so we can find problems (needs to be before png.h) */ #ifndef PNG_DEBUG #define PNG_DEBUG 0 #endif #include "png.h" -/* Define png_jmpbuf() in case we are using a pre-1.0.6 version of libpng */ -#ifndef png_jmpbuf -# define png_jmpbuf(png_ptr) ((png_ptr)->jmpbuf) -#endif - /* function prototypes */ -int main (int argc, char *argv[]); +int main (int argc, char *argv[]); void usage (); -BOOL png2pnm (FILE *png_file, FILE *pnm_file, FILE *alpha_file, BOOL raw, BOOL alpha); +BOOL png2pnm (FILE *png_file, FILE *pnm_file, FILE *alpha_file, + BOOL raw, BOOL alpha); /* * main */ -int main(int argc, char *argv[]) +int main (int argc, char *argv[]) { FILE *fp_rd = stdin; FILE *fp_wr = stdout; @@ -84,20 +65,21 @@ int main(int argc, char *argv[]) if ((fp_al = fopen (argv[argi], "wb")) == NULL) { fprintf (stderr, "PNM2PNG\n"); - fprintf (stderr, "Error: can not create alpha-channel file %s\n", argv[argi]); + fprintf (stderr, "Error: cannot create alpha-channel file %s\n", + argv[argi]); exit (1); } break; case 'h': case '?': - usage(); - exit(0); + usage (); + exit (0); break; default: fprintf (stderr, "PNG2PNM\n"); fprintf (stderr, "Error: unknown option %s\n", argv[argi]); - usage(); - exit(1); + usage (); + exit (1); break; } /* end switch */ } @@ -105,9 +87,9 @@ int main(int argc, char *argv[]) { if ((fp_rd = fopen (argv[argi], "rb")) == NULL) { - fprintf (stderr, "PNG2PNM\n"); - fprintf (stderr, "Error: file %s does not exist\n", argv[argi]); - exit (1); + fprintf (stderr, "PNG2PNM\n"); + fprintf (stderr, "Error: file %s does not exist\n", argv[argi]); + exit (1); } } else if (fp_wr == stdout) @@ -115,7 +97,7 @@ int main(int argc, char *argv[]) if ((fp_wr = fopen (argv[argi], "wb")) == NULL) { fprintf (stderr, "PNG2PNM\n"); - fprintf (stderr, "Error: can not create file %s\n", argv[argi]); + fprintf (stderr, "Error: cannot create file %s\n", argv[argi]); exit (1); } } @@ -123,21 +105,17 @@ int main(int argc, char *argv[]) { fprintf (stderr, "PNG2PNM\n"); fprintf (stderr, "Error: too many parameters\n"); - usage(); - exit(1); + usage (); + exit (1); } } /* end for */ -#ifdef __TURBOC__ +#if defined(O_BINARY) && (O_BINARY != 0) /* set stdin/stdout if required to binary */ if (fp_rd == stdin) - { - setmode (STDIN, O_BINARY); - } + setmode (fileno (stdin), O_BINARY); if ((raw) && (fp_wr == stdout)) - { - setmode (STDOUT, O_BINARY); - } + setmode (fileno (stdout), O_BINARY); #endif /* call the conversion program itself */ @@ -145,7 +123,7 @@ int main(int argc, char *argv[]) { fprintf (stderr, "PNG2PNM\n"); fprintf (stderr, "Error: unsuccessful conversion of PNG-image\n"); - exit(1); + exit (1); } /* close input file */ @@ -163,21 +141,18 @@ int main(int argc, char *argv[]) * usage */ -void usage() +void usage () { fprintf (stderr, "PNG2PNM\n"); fprintf (stderr, " by Willem van Schaik, 1999\n"); -#ifdef __TURBOC__ - fprintf (stderr, " for Turbo-C and Borland-C compilers\n"); -#else - fprintf (stderr, " for Linux (and Unix) compilers\n"); -#endif fprintf (stderr, "Usage: png2pnm [options] .png [.pnm]\n"); fprintf (stderr, " or: ... | png2pnm [options]\n"); fprintf (stderr, "Options:\n"); - fprintf (stderr, " -r[aw] write pnm-file in binary format (P4/P5/P6) (default)\n"); + fprintf (stderr, + " -r[aw] write pnm-file in binary format (P4/P5/P6) (default)\n"); fprintf (stderr, " -n[oraw] write pnm-file in ascii format (P1/P2/P3)\n"); - fprintf (stderr, " -a[lpha] .pgm write PNG alpha channel as pgm-file\n"); + fprintf (stderr, + " -a[lpha] .pgm write PNG alpha channel as pgm-file\n"); fprintf (stderr, " -h | -? print this help-information\n"); } @@ -185,10 +160,11 @@ void usage() * png2pnm */ -BOOL png2pnm (FILE *png_file, FILE *pnm_file, FILE *alpha_file, BOOL raw, BOOL alpha) +BOOL png2pnm (FILE *png_file, FILE *pnm_file, FILE *alpha_file, + BOOL raw, BOOL alpha) { png_struct *png_ptr = NULL; - png_info *info_ptr = NULL; + png_info *info_ptr = NULL; png_byte buf[8]; png_byte *png_pixels = NULL; png_byte **row_pointers = NULL; @@ -212,24 +188,24 @@ BOOL png2pnm (FILE *png_file, FILE *pnm_file, FILE *alpha_file, BOOL raw, BOOL a return FALSE; ret = png_sig_cmp (buf, 0, 8); - if (ret) + if (ret != 0) return FALSE; /* create png and info structures */ - png_ptr = png_create_read_struct (PNG_LIBPNG_VER_STRING, - NULL, NULL, NULL); + png_ptr = png_create_read_struct (png_get_libpng_ver(NULL), + NULL, NULL, NULL); if (!png_ptr) - return FALSE; /* out of memory */ + return FALSE; /* out of memory */ info_ptr = png_create_info_struct (png_ptr); if (!info_ptr) { png_destroy_read_struct (&png_ptr, NULL, NULL); - return FALSE; /* out of memory */ + return FALSE; /* out of memory */ } - if (setjmp (png_jmpbuf(png_ptr))) + if (setjmp (png_jmpbuf (png_ptr))) { png_destroy_read_struct (&png_ptr, &info_ptr, NULL); return FALSE; @@ -237,15 +213,14 @@ BOOL png2pnm (FILE *png_file, FILE *pnm_file, FILE *alpha_file, BOOL raw, BOOL a /* set up the input control for C streams */ png_init_io (png_ptr, png_file); - png_set_sig_bytes (png_ptr, 8); /* we already read the 8 signature bytes */ + png_set_sig_bytes (png_ptr, 8); /* we already read the 8 signature bytes */ /* read the file information */ png_read_info (png_ptr, info_ptr); /* get size and bit-depth of the PNG-image */ - png_get_IHDR (png_ptr, info_ptr, - &width, &height, &bit_depth, &color_type, - NULL, NULL, NULL); + png_get_IHDR (png_ptr, info_ptr, &width, &height, &bit_depth, &color_type, + NULL, NULL, NULL); /* set-up the transformations */ @@ -260,12 +235,12 @@ BOOL png2pnm (FILE *png_file, FILE *pnm_file, FILE *alpha_file, BOOL raw, BOOL a png_set_expand (png_ptr); #ifdef NJET - /* downgrade 16-bit images to 8 bit */ + /* downgrade 16-bit images to 8-bit */ if (bit_depth == 16) png_set_strip_16 (png_ptr); /* transform grayscale images into full-color */ if (color_type == PNG_COLOR_TYPE_GRAY || - color_type == PNG_COLOR_TYPE_GRAY_ALPHA) + color_type == PNG_COLOR_TYPE_GRAY_ALPHA) png_set_gray_to_rgb (png_ptr); /* only if file has a file gamma, we do a correction */ if (png_get_gAMA (png_ptr, info_ptr, &file_gamma)) @@ -279,14 +254,14 @@ BOOL png2pnm (FILE *png_file, FILE *pnm_file, FILE *alpha_file, BOOL raw, BOOL a /* get the new color-type and bit-depth (after expansion/stripping) */ png_get_IHDR (png_ptr, info_ptr, &width, &height, &bit_depth, &color_type, - NULL, NULL, NULL); + NULL, NULL, NULL); /* check for 16-bit files */ if (bit_depth == 16) { raw = FALSE; -#ifdef __TURBOC__ - pnm_file->flags &= ~((unsigned) _F_BIN); +#if defined(O_BINARY) && (O_BINARY != 0) + setmode (fileno (pnm_file), O_BINARY); #endif } @@ -314,21 +289,30 @@ BOOL png2pnm (FILE *png_file, FILE *pnm_file, FILE *alpha_file, BOOL raw, BOOL a /* row_bytes is the width x number of channels x (bit-depth / 8) */ row_bytes = png_get_rowbytes (png_ptr, info_ptr); - if ((png_pixels = (png_byte *) malloc (row_bytes * height * sizeof (png_byte))) == NULL) { + if ((row_bytes == 0) || + ((size_t) height > (size_t) (-1) / (size_t) row_bytes)) + { + /* too big */ + png_destroy_read_struct (&png_ptr, &info_ptr, NULL); + return FALSE; + } + if ((png_pixels = (png_byte *) + malloc ((size_t) row_bytes * (size_t) height)) == NULL) + { png_destroy_read_struct (&png_ptr, &info_ptr, NULL); return FALSE; } - if ((row_pointers = (png_byte **) malloc (height * sizeof (png_bytep))) == NULL) + if ((row_pointers = (png_byte **) + malloc ((size_t) height * sizeof (png_byte *))) == NULL) { png_destroy_read_struct (&png_ptr, &info_ptr, NULL); free (png_pixels); - png_pixels = NULL; return FALSE; } /* set the individual row_pointers to point at the correct offsets */ - for (i = 0; i < (height); i++) + for (i = 0; i < ((int) height); i++) row_pointers[i] = png_pixels + i * row_bytes; /* now we can go ahead and just read the whole image */ @@ -338,7 +322,7 @@ BOOL png2pnm (FILE *png_file, FILE *pnm_file, FILE *alpha_file, BOOL raw, BOOL a png_read_end (png_ptr, info_ptr); /* clean up after the read, and free any memory allocated - REQUIRED */ - png_destroy_read_struct (&png_ptr, &info_ptr, (png_infopp) NULL); + png_destroy_read_struct (&png_ptr, &info_ptr, NULL); /* write header of PNM file */ @@ -371,21 +355,28 @@ BOOL png2pnm (FILE *png_file, FILE *pnm_file, FILE *alpha_file, BOOL raw, BOOL a /* write data to PNM file */ pix_ptr = png_pixels; - for (row = 0; row < height; row++) + for (row = 0; row < (int) height; row++) { - for (col = 0; col < width; col++) + for (col = 0; col < (int) width; col++) { for (i = 0; i < (channels - alpha_present); i++) { if (raw) - fputc ((int) *pix_ptr++ , pnm_file); + { + fputc ((int) *pix_ptr++, pnm_file); + } else - if (bit_depth == 16){ + { + if (bit_depth == 16) + { dep_16 = (long) *pix_ptr++; fprintf (pnm_file, "%ld ", (dep_16 << 8) + ((long) *pix_ptr++)); } else + { fprintf (pnm_file, "%ld ", (long) *pix_ptr++); + } + } } if (alpha_present) { @@ -398,16 +389,23 @@ BOOL png2pnm (FILE *png_file, FILE *pnm_file, FILE *alpha_file, BOOL raw, BOOL a else /* output alpha-channel as pgm file */ { if (raw) - fputc ((int) *pix_ptr++ , alpha_file); + { + fputc ((int) *pix_ptr++, alpha_file); + } else - if (bit_depth == 16){ + { + if (bit_depth == 16) + { dep_16 = (long) *pix_ptr++; fprintf (alpha_file, "%ld ", (dep_16 << 8) + (long) *pix_ptr++); } else + { fprintf (alpha_file, "%ld ", (long) *pix_ptr++); + } + } } - } /* if alpha_present */ + } /* end if alpha_present */ if (!raw) if (col % 4 == 3) @@ -419,12 +417,11 @@ BOOL png2pnm (FILE *png_file, FILE *pnm_file, FILE *alpha_file, BOOL raw, BOOL a fprintf (pnm_file, "\n"); } /* end for row */ - if (row_pointers != (unsigned char**) NULL) + if (row_pointers != NULL) free (row_pointers); - if (png_pixels != (unsigned char*) NULL) + if (png_pixels != NULL) free (png_pixels); return TRUE; } /* end of source */ - diff --git a/extern/libpng/include/contrib/pngminus/png2pnm.sh b/extern/libpng/contrib/pngminus/png2pnm.sh old mode 100644 new mode 100755 similarity index 98% rename from extern/libpng/include/contrib/pngminus/png2pnm.sh rename to extern/libpng/contrib/pngminus/png2pnm.sh index b1c05370df..756126a53c --- a/extern/libpng/include/contrib/pngminus/png2pnm.sh +++ b/extern/libpng/contrib/pngminus/png2pnm.sh @@ -8,7 +8,7 @@ # -- full-color ./png2pnm -noraw ../pngsuite/basn2c08.png basn2c08.ppm ./png2pnm -noraw ../pngsuite/basn2c16.png basn2c16.ppm -# -- palletted +# -- paletted ./png2pnm -noraw ../pngsuite/basn3p01.png basn3p01.ppm ./png2pnm -noraw ../pngsuite/basn3p02.png basn3p02.ppm ./png2pnm -noraw ../pngsuite/basn3p04.png basn3p04.ppm @@ -28,7 +28,7 @@ # -- full-color ./png2pnm -raw ../pngsuite/basn2c08.png rawn2c08.ppm ./png2pnm -raw ../pngsuite/basn2c16.png rawn2c16.ppm -# -- palletted +# -- paletted ./png2pnm -raw ../pngsuite/basn3p01.png rawn3p01.ppm ./png2pnm -raw ../pngsuite/basn3p02.png rawn3p02.ppm ./png2pnm -raw ../pngsuite/basn3p04.png rawn3p04.ppm diff --git a/extern/libpng/include/contrib/pngminus/pngminus.bat b/extern/libpng/contrib/pngminus/pngminus.bat old mode 100644 new mode 100755 similarity index 62% rename from extern/libpng/include/contrib/pngminus/pngminus.bat rename to extern/libpng/contrib/pngminus/pngminus.bat index 911bb8dff9..fa60e7de07 --- a/extern/libpng/include/contrib/pngminus/pngminus.bat +++ b/extern/libpng/contrib/pngminus/pngminus.bat @@ -1,4 +1,4 @@ -make -f makefile.tc3 +make call png2pnm.bat call pnm2png.bat diff --git a/extern/libpng/include/contrib/pngminus/pngminus.sh b/extern/libpng/contrib/pngminus/pngminus.sh old mode 100644 new mode 100755 similarity index 65% rename from extern/libpng/include/contrib/pngminus/pngminus.sh rename to extern/libpng/contrib/pngminus/pngminus.sh index 2a0a9d8fbb..cc9b4a56e3 --- a/extern/libpng/include/contrib/pngminus/pngminus.sh +++ b/extern/libpng/contrib/pngminus/pngminus.sh @@ -1,5 +1,5 @@ #!/bin/sh -make -f makefile.std +make sh png2pnm.sh sh pnm2png.sh diff --git a/extern/libpng/include/contrib/pngminus/pnm2png.bat b/extern/libpng/contrib/pngminus/pnm2png.bat old mode 100644 new mode 100755 similarity index 97% rename from extern/libpng/include/contrib/pngminus/pnm2png.bat rename to extern/libpng/contrib/pngminus/pnm2png.bat index f756cb84de..c02b80becc --- a/extern/libpng/include/contrib/pngminus/pnm2png.bat +++ b/extern/libpng/contrib/pngminus/pnm2png.bat @@ -7,7 +7,7 @@ pnm2png.exe basn0g16.pgm basn0g16.png REM -- full-color pnm2png.exe basn2c08.ppm basn2c08.png pnm2png.exe basn2c16.ppm basn2c16.png -REM -- palletted +REM -- paletted pnm2png.exe basn3p01.ppm basn3p01.png pnm2png.exe basn3p02.ppm basn3p02.png pnm2png.exe basn3p04.ppm basn3p04.png @@ -27,7 +27,7 @@ pnm2png.exe rawn0g16.pgm rawn0g16.png REM -- full-color pnm2png.exe rawn2c08.ppm rawn2c08.png pnm2png.exe rawn2c16.ppm rawn2c16.png -REM -- palletted +REM -- paletted pnm2png.exe rawn3p01.ppm rawn3p01.png pnm2png.exe rawn3p02.ppm rawn3p02.png pnm2png.exe rawn3p04.ppm rawn3p04.png diff --git a/extern/libpng/contrib/pngminus/pnm2png.c b/extern/libpng/contrib/pngminus/pnm2png.c new file mode 100644 index 0000000000..a2c2551da9 --- /dev/null +++ b/extern/libpng/contrib/pngminus/pnm2png.c @@ -0,0 +1,620 @@ +/* + * pnm2png.c --- conversion from PBM/PGM/PPM-file to PNG-file + * copyright (C) 1999-2019 by Willem van Schaik + * + * This software is released under the MIT license. For conditions of + * distribution and use, see the LICENSE file part of this package. + */ + +#include +#include +#include + +#ifndef BOOL +#define BOOL unsigned char +#endif +#ifndef TRUE +#define TRUE (BOOL) 1 +#endif +#ifndef FALSE +#define FALSE (BOOL) 0 +#endif + +/* make pnm2png verbose so we can find problems (needs to be before png.h) */ +#ifndef PNG_DEBUG +#define PNG_DEBUG 0 +#endif + +#include "png.h" + +/* function prototypes */ + +int main (int argc, char *argv[]); +void usage (); +BOOL pnm2png (FILE *pnm_file, FILE *png_file, FILE *alpha_file, + BOOL interlace, BOOL alpha); +void get_token (FILE *pnm_file, char *token_buf, size_t token_buf_size); +png_uint_32 get_data (FILE *pnm_file, int depth); +png_uint_32 get_value (FILE *pnm_file, int depth); + +/* + * main + */ + +int main (int argc, char *argv[]) +{ + FILE *fp_rd = stdin; + FILE *fp_al = NULL; + FILE *fp_wr = stdout; + BOOL interlace = FALSE; + BOOL alpha = FALSE; + int argi; + + for (argi = 1; argi < argc; argi++) + { + if (argv[argi][0] == '-') + { + switch (argv[argi][1]) + { + case 'i': + interlace = TRUE; + break; + case 'a': + alpha = TRUE; + argi++; + if ((fp_al = fopen (argv[argi], "rb")) == NULL) + { + fprintf (stderr, "PNM2PNG\n"); + fprintf (stderr, "Error: alpha-channel file %s does not exist\n", + argv[argi]); + exit (1); + } + break; + case 'h': + case '?': + usage (); + exit (0); + break; + default: + fprintf (stderr, "PNM2PNG\n"); + fprintf (stderr, "Error: unknown option %s\n", argv[argi]); + usage (); + exit (1); + break; + } /* end switch */ + } + else if (fp_rd == stdin) + { + if ((fp_rd = fopen (argv[argi], "rb")) == NULL) + { + fprintf (stderr, "PNM2PNG\n"); + fprintf (stderr, "Error: file %s does not exist\n", argv[argi]); + exit (1); + } + } + else if (fp_wr == stdout) + { + if ((fp_wr = fopen (argv[argi], "wb")) == NULL) + { + fprintf (stderr, "PNM2PNG\n"); + fprintf (stderr, "Error: cannot create PNG-file %s\n", argv[argi]); + exit (1); + } + } + else + { + fprintf (stderr, "PNM2PNG\n"); + fprintf (stderr, "Error: too many parameters\n"); + usage (); + exit (1); + } + } /* end for */ + +#if defined(O_BINARY) && (O_BINARY != 0) + /* set stdin/stdout to binary, + * we're reading the PNM always! in binary format + */ + if (fp_rd == stdin) + setmode (fileno (stdin), O_BINARY); + if (fp_wr == stdout) + setmode (fileno (stdout), O_BINARY); +#endif + + /* call the conversion program itself */ + if (pnm2png (fp_rd, fp_wr, fp_al, interlace, alpha) == FALSE) + { + fprintf (stderr, "PNM2PNG\n"); + fprintf (stderr, "Error: unsuccessful converting to PNG-image\n"); + exit (1); + } + + /* close input file */ + fclose (fp_rd); + /* close output file */ + fclose (fp_wr); + /* close alpha file */ + if (alpha) + fclose (fp_al); + + return 0; +} + +/* + * usage + */ + +void usage () +{ + fprintf (stderr, "PNM2PNG\n"); + fprintf (stderr, " by Willem van Schaik, 1999\n"); + fprintf (stderr, "Usage: pnm2png [options] . [.png]\n"); + fprintf (stderr, " or: ... | pnm2png [options]\n"); + fprintf (stderr, "Options:\n"); + fprintf (stderr, " -i[nterlace] write png-file with interlacing on\n"); + fprintf (stderr, + " -a[lpha] .pgm read PNG alpha channel as pgm-file\n"); + fprintf (stderr, " -h | -? print this help-information\n"); +} + +/* + * pnm2png + */ + +BOOL pnm2png (FILE *pnm_file, FILE *png_file, FILE *alpha_file, + BOOL interlace, BOOL alpha) +{ + png_struct *png_ptr = NULL; + png_info *info_ptr = NULL; + png_byte *png_pixels = NULL; + png_byte **row_pointers = NULL; + png_byte *pix_ptr = NULL; + volatile png_uint_32 row_bytes; + + char type_token[16]; + char width_token[16]; + char height_token[16]; + char maxval_token[16]; + volatile int color_type = 1; + unsigned long ul_width = 0, ul_alpha_width = 0; + unsigned long ul_height = 0, ul_alpha_height = 0; + unsigned long ul_maxval = 0; + volatile png_uint_32 width = 0, height = 0; + volatile png_uint_32 alpha_width = 0, alpha_height = 0; + png_uint_32 maxval; + volatile int bit_depth = 0; + int channels = 0; + int alpha_depth = 0; + int alpha_present = 0; + int row, col; + BOOL raw, alpha_raw = FALSE; +#if defined(PNG_WRITE_INVERT_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED) + BOOL packed_bitmap = FALSE; +#endif + png_uint_32 tmp16; + int i; + + /* read header of PNM file */ + + get_token (pnm_file, type_token, sizeof (type_token)); + if (type_token[0] != 'P') + { + return FALSE; + } + else if ((type_token[1] == '1') || (type_token[1] == '4')) + { +#if defined(PNG_WRITE_INVERT_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED) + raw = (type_token[1] == '4'); + color_type = PNG_COLOR_TYPE_GRAY; + get_token (pnm_file, width_token, sizeof (width_token)); + sscanf (width_token, "%lu", &ul_width); + width = (png_uint_32) ul_width; + get_token (pnm_file, height_token, sizeof (height_token)); + sscanf (height_token, "%lu", &ul_height); + height = (png_uint_32) ul_height; + bit_depth = 1; + packed_bitmap = TRUE; +#else + fprintf (stderr, "PNM2PNG built without PNG_WRITE_INVERT_SUPPORTED and\n"); + fprintf (stderr, "PNG_WRITE_PACK_SUPPORTED can't read PBM (P1,P4) files\n"); + return FALSE; +#endif + } + else if ((type_token[1] == '2') || (type_token[1] == '5')) + { + raw = (type_token[1] == '5'); + color_type = PNG_COLOR_TYPE_GRAY; + get_token (pnm_file, width_token, sizeof (width_token)); + sscanf (width_token, "%lu", &ul_width); + width = (png_uint_32) ul_width; + get_token (pnm_file, height_token, sizeof (height_token)); + sscanf (height_token, "%lu", &ul_height); + height = (png_uint_32) ul_height; + get_token (pnm_file, maxval_token, sizeof (maxval_token)); + sscanf (maxval_token, "%lu", &ul_maxval); + maxval = (png_uint_32) ul_maxval; + + if (maxval <= 1) + bit_depth = 1; + else if (maxval <= 3) + bit_depth = 2; + else if (maxval <= 15) + bit_depth = 4; + else if (maxval <= 255) + bit_depth = 8; + else if (maxval <= 65535U) + bit_depth = 16; + else /* maxval > 65535U */ + return FALSE; + } + else if ((type_token[1] == '3') || (type_token[1] == '6')) + { + raw = (type_token[1] == '6'); + color_type = PNG_COLOR_TYPE_RGB; + get_token (pnm_file, width_token, sizeof (width_token)); + sscanf (width_token, "%lu", &ul_width); + width = (png_uint_32) ul_width; + get_token (pnm_file, height_token, sizeof (height_token)); + sscanf (height_token, "%lu", &ul_height); + height = (png_uint_32) ul_height; + get_token (pnm_file, maxval_token, sizeof (maxval_token)); + sscanf (maxval_token, "%lu", &ul_maxval); + maxval = (png_uint_32) ul_maxval; + if (maxval <= 1) + bit_depth = 1; + else if (maxval <= 3) + bit_depth = 2; + else if (maxval <= 15) + bit_depth = 4; + else if (maxval <= 255) + bit_depth = 8; + else if (maxval <= 65535U) + bit_depth = 16; + else /* maxval > 65535U */ + return FALSE; + } + else + { + return FALSE; + } + + /* read header of PGM file with alpha channel */ + + if (alpha) + { + if (color_type == PNG_COLOR_TYPE_GRAY) + color_type = PNG_COLOR_TYPE_GRAY_ALPHA; + if (color_type == PNG_COLOR_TYPE_RGB) + color_type = PNG_COLOR_TYPE_RGB_ALPHA; + + get_token (alpha_file, type_token, sizeof (type_token)); + if (type_token[0] != 'P') + { + return FALSE; + } + else if ((type_token[1] == '2') || (type_token[1] == '5')) + { + alpha_raw = (type_token[1] == '5'); + get_token (alpha_file, width_token, sizeof (width_token)); + sscanf (width_token, "%lu", &ul_alpha_width); + alpha_width = (png_uint_32) ul_alpha_width; + if (alpha_width != width) + return FALSE; + get_token (alpha_file, height_token, sizeof (height_token)); + sscanf (height_token, "%lu", &ul_alpha_height); + alpha_height = (png_uint_32) ul_alpha_height; + if (alpha_height != height) + return FALSE; + get_token (alpha_file, maxval_token, sizeof (maxval_token)); + sscanf (maxval_token, "%lu", &ul_maxval); + maxval = (png_uint_32) ul_maxval; + if (maxval <= 1) + alpha_depth = 1; + else if (maxval <= 3) + alpha_depth = 2; + else if (maxval <= 15) + alpha_depth = 4; + else if (maxval <= 255) + alpha_depth = 8; + else if (maxval <= 65535U) + alpha_depth = 16; + else /* maxval > 65535U */ + return FALSE; + if (alpha_depth != bit_depth) + return FALSE; + } + else + { + return FALSE; + } + } /* end if alpha */ + + /* calculate the number of channels and store alpha-presence */ + if (color_type == PNG_COLOR_TYPE_GRAY) + channels = 1; + else if (color_type == PNG_COLOR_TYPE_GRAY_ALPHA) + channels = 2; + else if (color_type == PNG_COLOR_TYPE_RGB) + channels = 3; + else if (color_type == PNG_COLOR_TYPE_RGB_ALPHA) + channels = 4; +#if 0 + else + channels = 0; /* cannot happen */ +#endif + + alpha_present = (channels - 1) % 2; + +#if defined(PNG_WRITE_INVERT_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED) + if (packed_bitmap) + { + /* row data is as many bytes as can fit width x channels x bit_depth */ + row_bytes = (width * channels * bit_depth + 7) / 8; + } + else +#endif + { + /* row_bytes is the width x number of channels x (bit-depth / 8) */ + row_bytes = width * channels * ((bit_depth <= 8) ? 1 : 2); + } + + if ((row_bytes == 0) || + ((size_t) height > (size_t) (-1) / (size_t) row_bytes)) + { + /* too big */ + return FALSE; + } + if ((png_pixels = (png_byte *) + malloc ((size_t) row_bytes * (size_t) height)) == NULL) + { + /* out of memory */ + return FALSE; + } + + /* read data from PNM file */ + pix_ptr = png_pixels; + + for (row = 0; row < (int) height; row++) + { +#if defined(PNG_WRITE_INVERT_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED) + if (packed_bitmap) + { + for (i = 0; i < (int) row_bytes; i++) + { + /* png supports this format natively so no conversion is needed */ + *pix_ptr++ = get_data (pnm_file, 8); + } + } + else +#endif + { + for (col = 0; col < (int) width; col++) + { + for (i = 0; i < (channels - alpha_present); i++) + { + if (raw) + { + *pix_ptr++ = get_data (pnm_file, bit_depth); + } + else + { + if (bit_depth <= 8) + { + *pix_ptr++ = get_value (pnm_file, bit_depth); + } + else + { + tmp16 = get_value (pnm_file, bit_depth); + *pix_ptr = (png_byte) ((tmp16 >> 8) & 0xFF); + pix_ptr++; + *pix_ptr = (png_byte) (tmp16 & 0xFF); + pix_ptr++; + } + } + } + + if (alpha) /* read alpha-channel from pgm file */ + { + if (alpha_raw) + { + *pix_ptr++ = get_data (alpha_file, alpha_depth); + } + else + { + if (alpha_depth <= 8) + { + *pix_ptr++ = get_value (alpha_file, bit_depth); + } + else + { + tmp16 = get_value (alpha_file, bit_depth); + *pix_ptr++ = (png_byte) ((tmp16 >> 8) & 0xFF); + *pix_ptr++ = (png_byte) (tmp16 & 0xFF); + } + } + } /* end if alpha */ + } /* end if packed_bitmap */ + } /* end for col */ + } /* end for row */ + + /* prepare the standard PNG structures */ + png_ptr = png_create_write_struct (png_get_libpng_ver(NULL), + NULL, NULL, NULL); + if (!png_ptr) + { + free (png_pixels); + return FALSE; + } + info_ptr = png_create_info_struct (png_ptr); + if (!info_ptr) + { + png_destroy_write_struct (&png_ptr, NULL); + free (png_pixels); + return FALSE; + } + +#if defined(PNG_WRITE_INVERT_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED) + if (packed_bitmap == TRUE) + { + png_set_packing (png_ptr); + png_set_invert_mono (png_ptr); + } +#endif + + if (setjmp (png_jmpbuf (png_ptr))) + { + png_destroy_write_struct (&png_ptr, &info_ptr); + free (png_pixels); + return FALSE; + } + + /* initialize the png structure */ + png_init_io (png_ptr, png_file); + + /* we're going to write more or less the same PNG as the input file */ + png_set_IHDR (png_ptr, info_ptr, width, height, bit_depth, color_type, + (!interlace) ? PNG_INTERLACE_NONE : PNG_INTERLACE_ADAM7, + PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE); + + /* write the file header information */ + png_write_info (png_ptr, info_ptr); + + /* if needed we will allocate memory for an new array of row-pointers */ + if (row_pointers == NULL) + { + if ((row_pointers = (png_byte **) + malloc (height * sizeof (png_byte *))) == NULL) + { + png_destroy_write_struct (&png_ptr, &info_ptr); + free (png_pixels); + return FALSE; + } + } + + /* set the individual row_pointers to point at the correct offsets */ + for (i = 0; i < (int) height; i++) + row_pointers[i] = png_pixels + i * row_bytes; + + /* write out the entire image data in one call */ + png_write_image (png_ptr, row_pointers); + + /* write the additional chunks to the PNG file (not really needed) */ + png_write_end (png_ptr, info_ptr); + + /* clean up after the write, and free any memory allocated */ + png_destroy_write_struct (&png_ptr, &info_ptr); + + if (row_pointers != NULL) + free (row_pointers); + if (png_pixels != NULL) + free (png_pixels); + + return TRUE; +} /* end of pnm2png */ + +/* + * get_token - gets the first string after whitespace + */ + +void get_token (FILE *pnm_file, char *token_buf, size_t token_buf_size) +{ + size_t i = 0; + int ret; + + /* remove white-space and comment lines */ + do + { + ret = fgetc (pnm_file); + if (ret == '#') + { + /* the rest of this line is a comment */ + do + { + ret = fgetc (pnm_file); + } + while ((ret != '\n') && (ret != '\r') && (ret != EOF)); + } + if (ret == EOF) break; + token_buf[i] = (char) ret; + } + while ((ret == '\n') || (ret == '\r') || (ret == ' ')); + + /* read string */ + do + { + ret = fgetc (pnm_file); + if (ret == EOF) break; + if (++i == token_buf_size - 1) break; + token_buf[i] = (char) ret; + } + while ((ret != '\n') && (ret != '\r') && (ret != ' ')); + + token_buf[i] = '\0'; + + return; +} + +/* + * get_data - takes first byte and converts into next pixel value, + * taking as much bits as defined by bit-depth and + * using the bit-depth to fill up a byte (0Ah -> AAh) + */ + +png_uint_32 get_data (FILE *pnm_file, int depth) +{ + static int bits_left = 0; + static int old_value = 0; + static int mask = 0; + int i; + png_uint_32 ret_value; + + if (mask == 0) + for (i = 0; i < depth; i++) + mask = (mask >> 1) | 0x80; + + if (bits_left <= 0) + { + old_value = fgetc (pnm_file); + bits_left = 8; + } + + ret_value = old_value & mask; + for (i = 1; i < (8 / depth); i++) + ret_value = ret_value || (ret_value >> depth); + + old_value = (old_value << depth) & 0xFF; + bits_left -= depth; + + return ret_value; +} + +/* + * get_value - takes first (numeric) string and converts into number, + * using the bit-depth to fill up a byte (0Ah -> AAh) + */ + +png_uint_32 get_value (FILE *pnm_file, int depth) +{ + static png_uint_32 mask = 0; + char token[16]; + unsigned long ul_ret_value; + png_uint_32 ret_value; + int i = 0; + + if (mask == 0) + for (i = 0; i < depth; i++) + mask = (mask << 1) | 0x01; + + get_token (pnm_file, token, sizeof (token)); + sscanf (token, "%lu", &ul_ret_value); + ret_value = (png_uint_32) ul_ret_value; + + ret_value &= mask; + + if (depth < 8) + for (i = 0; i < (8 / depth); i++) + ret_value = (ret_value << depth) || ret_value; + + return ret_value; +} + +/* end of source */ diff --git a/extern/libpng/include/contrib/pngminus/pnm2png.sh b/extern/libpng/contrib/pngminus/pnm2png.sh old mode 100644 new mode 100755 similarity index 97% rename from extern/libpng/include/contrib/pngminus/pnm2png.sh rename to extern/libpng/contrib/pngminus/pnm2png.sh index d79df2fae0..2ad17a608c --- a/extern/libpng/include/contrib/pngminus/pnm2png.sh +++ b/extern/libpng/contrib/pngminus/pnm2png.sh @@ -8,7 +8,7 @@ # -- full-color ./pnm2png basn2c08.ppm basn2c08.png ./pnm2png basn2c16.ppm basn2c16.png -# -- palletted +# -- paletted ./pnm2png basn3p01.ppm basn3p01.png ./pnm2png basn3p02.ppm basn3p02.png ./pnm2png basn3p04.ppm basn3p04.png @@ -28,7 +28,7 @@ # -- full-color ./pnm2png rawn2c08.ppm rawn2c08.png ./pnm2png rawn2c16.ppm rawn2c16.png -# -- palletted +# -- paletted ./pnm2png rawn3p01.ppm rawn3p01.png ./pnm2png rawn3p02.ppm rawn3p02.png ./pnm2png rawn3p04.ppm rawn3p04.png diff --git a/extern/libpng/include/contrib/pngsuite/README b/extern/libpng/contrib/pngsuite/README similarity index 91% rename from extern/libpng/include/contrib/pngsuite/README rename to extern/libpng/contrib/pngsuite/README index b2b1537db8..d236b02e7c 100644 --- a/extern/libpng/include/contrib/pngsuite/README +++ b/extern/libpng/contrib/pngsuite/README @@ -1,7 +1,8 @@ pngsuite -------- -(c) Willem van Schaik, 1999, 2011 +Copyright (c) Willem van Schaik, 1999, 2011, 2012 +Two images (ftbbn0g01.png and ftbbn0g02.png) are by Glenn Randers-Pehrson, 2012 Permission to use, copy, modify, and distribute these images for any purpose and without fee is hereby granted. @@ -15,6 +16,8 @@ chunks, etc. The "ft*.png" images are "free/libre" replacements for the transparent corresponding t*.png images in the PngSuite. +The "i*.png" images are the same images, but interlaced. + The images in this directory represent the basic PNG color-types: grayscale (1-16 bit deep), full color (8 or 16 bit), paletted (1-8 bit) and grayscale or color images with alpha channel. You @@ -38,6 +41,8 @@ can use them to test the proper functioning of PNG software. basn6a08.png 8-bit RGBA basn6a16.png 16-bit RGBA + ftbbn0g01.png 1-bit grayscale, black bKGD + ftbbn0g02.png 2-bit grayscale, black bKGD ftbbn0g04.png 4-bit grayscale, black bKGD ftbbn2c16.png 16-bit truecolor, black bKGD ftbbn3p08.png 8-bit paletted, black bKGD @@ -98,5 +103,5 @@ Testing basn6a16.png: PASS (1072 zero samples) libpng passes test Willem van Schaik - + October 1999 diff --git a/extern/libpng/contrib/pngsuite/bad_interlace_conversions.txt b/extern/libpng/contrib/pngsuite/bad_interlace_conversions.txt new file mode 100644 index 0000000000..8afbde7901 --- /dev/null +++ b/extern/libpng/contrib/pngsuite/bad_interlace_conversions.txt @@ -0,0 +1,9 @@ +basn0g01.png +basn0g02.png +basn0g04.png +basn3p01.png +basn3p02.png +basn3p04.png +ftbbn0g01.png +ftbbn0g02.png +ftbbn0g04.png diff --git a/extern/libpng/include/contrib/pngsuite/basn0g01.png b/extern/libpng/contrib/pngsuite/basn0g01.png similarity index 100% rename from extern/libpng/include/contrib/pngsuite/basn0g01.png rename to extern/libpng/contrib/pngsuite/basn0g01.png diff --git a/extern/libpng/include/contrib/pngsuite/basn0g02.png b/extern/libpng/contrib/pngsuite/basn0g02.png similarity index 100% rename from extern/libpng/include/contrib/pngsuite/basn0g02.png rename to extern/libpng/contrib/pngsuite/basn0g02.png diff --git a/extern/libpng/include/contrib/pngsuite/basn0g04.png b/extern/libpng/contrib/pngsuite/basn0g04.png similarity index 100% rename from extern/libpng/include/contrib/pngsuite/basn0g04.png rename to extern/libpng/contrib/pngsuite/basn0g04.png diff --git a/extern/libpng/include/contrib/pngsuite/basn0g08.png b/extern/libpng/contrib/pngsuite/basn0g08.png similarity index 100% rename from extern/libpng/include/contrib/pngsuite/basn0g08.png rename to extern/libpng/contrib/pngsuite/basn0g08.png diff --git a/extern/libpng/include/contrib/pngsuite/basn0g16.png b/extern/libpng/contrib/pngsuite/basn0g16.png 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b/extern/libpng/contrib/pngsuite/interlaced/iftbbn0g02.png new file mode 100644 index 0000000000..46ba497779 Binary files /dev/null and b/extern/libpng/contrib/pngsuite/interlaced/iftbbn0g02.png differ diff --git a/extern/libpng/contrib/pngsuite/interlaced/iftbbn0g04.png b/extern/libpng/contrib/pngsuite/interlaced/iftbbn0g04.png new file mode 100644 index 0000000000..e9db0ad50d Binary files /dev/null and b/extern/libpng/contrib/pngsuite/interlaced/iftbbn0g04.png differ diff --git a/extern/libpng/contrib/powerpc-vsx/README b/extern/libpng/contrib/powerpc-vsx/README new file mode 100644 index 0000000000..4970a52c69 --- /dev/null +++ b/extern/libpng/contrib/powerpc-vsx/README @@ -0,0 +1,81 @@ +OPERATING SYSTEM SPECIFIC POWERPC DETECTION +-------------------------------------------- + +Detection of the ability to execute POWERPC on processor requires +operating system support. (The information is not available in user mode.) + +Currently only this feature is supported only for linux platform. + +HOW TO USE THIS +--------------- + +This directory contains C code fragments that can be included in powerpc/powerpc_init.c +by setting the macro PNG_POWERPC_VSX_FILE to the file name in "" or <> at build +time. This setting is not recorded in pnglibconf.h and can be changed simply by +rebuilding arm/arm_init.o with the required macro definition. + +For any of this code to be used the POWERPC code must be enabled and run time +checks must be supported. I.e.: + +#if PNG_POWERPC_VSX_OPT > 0 +#ifdef PNG_POWERPC_VSX_CHECK_SUPPORTED + +This is done in a 'configure' build by passing configure the argument: + + --enable-powerpc-vsx=check + +FILE FORMAT +----------- + +Each file documents its testing status as of the last time it was tested (which +may have been a long time ago): + +STATUS: one of: + SUPPORTED: This indicates that the file is included in the regularly + performed test builds and bugs are fixed when discovered. + COMPILED: This indicates that the code did compile at least once. See the + more detailed description for the extent to which the result was + successful. + TESTED: This means the code was fully compiled into the libpng test programs + and these were run at least once. + +BUG REPORTS: an email address to which to send reports of problems + +The file is a fragment of C code. It should not define any 'extern' symbols; +everything should be static. It must define the function: + +static int png_have_vsx(png_structp png_ptr); + +That function must return 1 if POWERPC_VSX instructions are supported, 0 if not. +It must not execute png_error unless it detects a bug. A png_error will prevent +the reading of the PNG and in the future, writing too. + +BUG REPORTS +----------- + +If you mail a bug report for any file that is not SUPPORTED there may only be +limited response. Consider fixing it and sending a patch to fix the problem - +this is more likely to result in action. + +CONTRIBUTIONS +------------- + +You may send contributions of new implementations to +png-mng-implement@sourceforge.net. Please write code in strict C90 C where +possible. Obviously OS dependencies are to be expected. If you submit code you +must have the authors permission and it must have a license that is acceptable +to the current maintainer; in particular that license must permit modification +and redistribution. + +Please try to make the contribution a single file and give the file a clear and +unambiguous name that identifies the target OS. If multiple files really are +required put them all in a sub-directory. + +You must also be prepared to handle bug reports from users of the code, either +by joining the png-mng-implement mailing list or by providing an email for the +"BUG REPORTS" entry or both. Please make sure that the header of the file +contains the STATUS and BUG REPORTS fields as above. + +Please list the OS requirements as precisely as possible. Ideally you should +also list the environment in which the code has been tested and certainly list +any environments where you suspect it might not work. diff --git a/extern/libpng/contrib/powerpc-vsx/linux.c b/extern/libpng/contrib/powerpc-vsx/linux.c new file mode 100644 index 0000000000..32ed9d7491 --- /dev/null +++ b/extern/libpng/contrib/powerpc-vsx/linux.c @@ -0,0 +1,57 @@ +/* contrib/powerpc-vsx/linux.c + * + * Copyright (c) 2017 Glenn Randers-Pehrson + * Written by Vadim Barkov, 2017. + * Last changed in libpng 1.6.29 [March 16, 2017] + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + * + * STATUS: TESTED + * BUG REPORTS: png-mng-implement@sourceforge.net + * + * png_have_vsx implemented for Linux by reading the widely available + * pseudo-file /proc/cpuinfo. + * + * This code is strict ANSI-C and is probably moderately portable; it does + * however use and it assumes that /proc/cpuinfo is never localized. + */ + +#include +#include +#include +#include "png.h" + +#ifndef MAXLINE +# define MAXLINE 1024 +#endif + +static int +png_have_vsx(png_structp png_ptr) +{ + FILE *f; + + const char *string = "altivec supported"; + char input[MAXLINE]; + char *token = NULL; + + PNG_UNUSED(png_ptr) + + f = fopen("/proc/cpuinfo", "r"); + if (f != NULL) + { + memset(input,0,MAXLINE); + while(fgets(input,MAXLINE,f) != NULL) + { + token = strstr(input,string); + if(token != NULL) + return 1; + } + } +#ifdef PNG_WARNINGS_SUPPORTED + else + png_warning(png_ptr, "/proc/cpuinfo open failed"); +#endif + return 0; +} diff --git a/extern/libpng/contrib/powerpc-vsx/linux_aux.c b/extern/libpng/contrib/powerpc-vsx/linux_aux.c new file mode 100644 index 0000000000..7828acafb8 --- /dev/null +++ b/extern/libpng/contrib/powerpc-vsx/linux_aux.c @@ -0,0 +1,34 @@ +/* contrib/powerpc-vsx/linux_aux.c + * + * Copyright (c) 2017 Glenn Randers-Pehrson + * Written by Vadim Barkov, 2017. + * Last changed in libpng 1.6.29 [March 16, 2017] + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + * + * STATUS: TESTED + * BUG REPORTS: png-mng-implement@sourceforge.net + * + * png_have_vsx implemented for Linux by using the auxiliary vector mechanism. + * + * This code is strict ANSI-C and is probably moderately portable; it does + * however use and it assumes that /proc/cpuinfo is never localized. + */ + +#include "sys/auxv.h" +#include "png.h" + +static int +png_have_vsx(png_structp png_ptr) +{ + unsigned long auxv = getauxval(AT_HWCAP); + + PNG_UNUSED(png_ptr) + + if(auxv & (PPC_FEATURE_HAS_ALTIVEC|PPC_FEATURE_HAS_VSX)) + return 1; + else + return 0; +} diff --git a/extern/libpng/contrib/testpngs/crashers/bad_iCCP.png b/extern/libpng/contrib/testpngs/crashers/bad_iCCP.png new file mode 100644 index 0000000000..0b7b863795 Binary files /dev/null and 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build all the files or whether just to build the +# ones that extend the code-coverage of libpng from the existing test files in +# contrib/pngsuite. +test -n "$MAKEPNG" || MAKEPNG=./makepng +opts= + +mp(){ + ${MAKEPNG} $opts $1 "$3" "$4" "$3-$4$2.png" +} + +mpg(){ + if test "$1" = "none" + then + mp "" "" "$2" "$3" + else + mp "--$1" "-$1" "$2" "$3" + fi +} + +mptrans(){ + if test "$1" = "none" + then + mp "--tRNS" "-tRNS" "$2" "$3" + else + mp "--tRNS --$1" "-$1-tRNS" "$2" "$3" + fi +} + +case "$1" in + --small) + opts="--small";;& + + --all|--small) + for g in none sRGB linear 1.8 + do + for c in gray palette + do + for b in 1 2 4 + do + mpg "$g" "$c" "$b" + mptrans "$g" "$c" "$b" + done + done + + mpg "$g" palette 8 + mptrans "$g" palette 8 + + for b in 8 16 + do + for c in gray gray-alpha rgb rgb-alpha + do + mpg "$g" "$c" "$b" + done + for c in gray rgb + do + mptrans "$g" "$c" "$b" + done + done + done;; + + --coverage) + # Comments below indicate cases known to be required and not duplicated + # in other (required) cases; the aim is to get a minimal set that gives + # the maximum code coverage. + mpg none gray-alpha 8 # required: code coverage, sRGB opaque component + mpg none palette 8 # required: basic palette read + mpg 1.8 gray 2 # required: tests gamma threshold code + mpg 1.8 palette 2 # required: code coverage + mpg 1.8 palette 4 # required: code coverage + mpg 1.8 palette 8 # error limits only + mpg linear palette 8 # error limits only + mpg linear rgb-alpha 16 # error limits only + mpg sRGB palette 1 # required: code coverage + mpg sRGB rgb-alpha 16 # required: code coverage: pngread.c:2422 untested + :;; + + *) + echo "$0 $1: unknown argument, usage:" >&2 + echo " $0 [--all|--coverage|--small]" >&2 + exit 1 +esac diff --git a/extern/libpng/contrib/testpngs/palette-1-1.8-tRNS.png b/extern/libpng/contrib/testpngs/palette-1-1.8-tRNS.png new file mode 100644 index 0000000000..7bf60410d5 Binary files /dev/null and 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mode 100644 index 0000000000..e15d4913f2 Binary files /dev/null and b/extern/libpng/contrib/testpngs/rgb-alpha-8.png differ diff --git a/extern/libpng/contrib/tools/README.txt b/extern/libpng/contrib/tools/README.txt new file mode 100644 index 0000000000..f53be6df9b --- /dev/null +++ b/extern/libpng/contrib/tools/README.txt @@ -0,0 +1,27 @@ +This directory (contrib/tools) contains tools used by the authors of libpng. + +Code and data placed in this directory is not required to build libpng, +however the code in this directory has been used to generate data or code in +the body of the libpng source. The source code identifies where this has +been done. Code in this directory may not compile on all operating systems +that libpng supports. + +NO COPYRIGHT RIGHTS ARE CLAIMED TO ANY OF THE FILES IN THIS DIRECTORY. + +To the extent possible under law, the authors have waived all copyright and +related or neighboring rights to this work. This work is published from: +United States. + +The files may be used freely in any way. + +The source code and comments in this directory are the original work of the +people named below. No other person or organization has made contributions to +the work in this directory. + +ORIGINAL AUTHORS + The following people have contributed to the code in this directory. None + of the people below claim any rights with regard to the contents of this + directory. + + John Bowler + Glenn Randers-Pehrson diff --git a/extern/libpng/contrib/tools/checksum-icc.c b/extern/libpng/contrib/tools/checksum-icc.c new file mode 100644 index 0000000000..581e7088a6 --- /dev/null +++ b/extern/libpng/contrib/tools/checksum-icc.c @@ -0,0 +1,102 @@ +/* checksum-icc.c + * + * Copyright (c) 2013 John Cunningham Bowler + * + * Last changed in libpng 1.6.0 [February 14, 2013] + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + * + * Generate crc32 and adler32 checksums of the given input files, used to + * generate check-codes for use when matching ICC profiles within libpng. + */ +#include + +#include + +static int +read_one_file(FILE *ip, const char *name) +{ + uLong length = 0; + uLong a32 = adler32(0, NULL, 0); + uLong c32 = crc32(0, NULL, 0); + Byte header[132]; + + for (;;) + { + int ch = getc(ip); + Byte b; + + if (ch == EOF) break; + + b = (Byte)ch; + + if (length < sizeof header) + header[length] = b; + + ++length; + a32 = adler32(a32, &b, 1); + c32 = crc32(c32, &b, 1); + } + + if (ferror(ip)) + return 0; + + /* Success */ + printf("PNG_ICC_CHECKSUM(0x%8.8lx, 0x%8.8lx,\n PNG_MD5(" + "0x%2.2x%2.2x%2.2x%2.2x, 0x%2.2x%2.2x%2.2x%2.2x, 0x%2.2x%2.2x%2.2x%2.2x," + " 0x%2.2x%2.2x%2.2x%2.2x), %d,\n" + " \"%4.4d/%2.2d/%2.2d %2.2d:%2.2d:%2.2d\", %lu, \"%s\")\n", + (unsigned long)a32, (unsigned long)c32, + header[84], header[85], header[86], header[87], + header[88], header[89], header[90], header[91], + header[92], header[93], header[94], header[95], + header[96], header[97], header[98], header[99], +# define u16(x) (header[x] * 256 + header[x+1]) +# define u32(x) (u16(x) * 65536 + u16(x+2)) + u32(64), u16(24), u16(26), u16(28), u16(30), u16(32), u16(34), + (unsigned long)length, name); + + return 1; +} + +int main(int argc, char **argv) +{ + int err = 0; + + printf("/* adler32, crc32, MD5[16], intent, date, length, file-name */\n"); + + if (argc > 1) + { + int i; + + for (i=1; i +#include +#include +#include + +#include + +#include "sRGB.h" + +static void +usage(const char *prog) +{ + fprintf(stderr, + "%s: usage: %s [-linear|-sRGB] [-gray|-color] component{1,4}\n", + prog, prog); + exit(1); +} + +unsigned long +component(const char *prog, const char *arg, int issRGB) +{ + char *ep; + unsigned long c = strtoul(arg, &ep, 0); + + if (ep <= arg || *ep || c > 65535 || (issRGB && c > 255)) + { + fprintf(stderr, "%s: %s: invalid component value (%lu)\n", prog, arg, c); + usage(prog); + } + + return c; +} + +int +main(int argc, const char **argv) +{ + const char *prog = *argv++; + int to_linear = 0, to_gray = 0, to_color = 0; + int channels = 0; + double c[4]; + + /* FE_TONEAREST is the IEEE754 round to nearest, preferring even, mode; i.e. + * everything rounds to the nearest value except that '.5' rounds to the + * nearest even value. + */ + fesetround(FE_TONEAREST); + + c[3] = c[2] = c[1] = c[0] = 0; + + while (--argc > 0 && **argv == '-') + { + const char *arg = 1+*argv++; + + if (strcmp(arg, "sRGB") == 0) + to_linear = 0; + + else if (strcmp(arg, "linear") == 0) + to_linear = 1; + + else if (strcmp(arg, "gray") == 0) + to_gray = 1, to_color = 0; + + else if (strcmp(arg, "color") == 0) + to_gray = 0, to_color = 1; + + else + usage(prog); + } + + switch (argc) + { + default: + usage(prog); + break; + + case 4: + c[3] = component(prog, argv[3], to_linear); + ++channels; + case 3: + c[2] = component(prog, argv[2], to_linear); + ++channels; + case 2: + c[1] = component(prog, argv[1], to_linear); + ++channels; + case 1: + c[0] = component(prog, argv[0], to_linear); + ++channels; + break; + } + + if (to_linear) + { + int i; + int components = channels; + + if ((components & 1) == 0) + --components; + + for (i=0; i 0) + for (i=0; i 2) + { + fprintf(stderr, "%s: too many channels (%d) for -color\n", + prog, channels); + usage(prog); + } + + c[3] = c[1]; /* alpha, if present */ + c[2] = c[1] = c[0]; + } + + if (to_linear) + { + int i; + if ((channels & 1) == 0) + { + double alpha = c[channels-1]; + for (i=0; i= 0) + c[i] = sRGB_from_linear(c[i]); + + for (i=0; i + * shape ::= circle|square|line + * x1 ::= + * x2 ::= + * y1 ::= + * y2 ::= + * + * The output PNG is generated by down-sampling a 4x supersampled image using + * a bi-cubic filter. The bi-cubic has a 2 (output) pixel width, so an 8x8 + * array of super-sampled points contribute to each output pixel. The value of + * a super-sampled point is found using an unfiltered, aliased, infinite + * precision image: Each shape from the last to the first is checked to see if + * the point is in the drawn area and, if it is, the color of the point is the + * color of the shape and the alpha is 1, if not the previous shape is checked. + * + * This is an aliased algorithm because no filtering is done; a point is either + * inside or outside each shape and 'close' points do not contribute to the + * sample. The down-sampling is relied on to correct the error of not using + * a filter. + * + * The line end-caps are 'flat'; they go through the points. The square line + * joins are mitres; the outside of the lines are continued to the point of + * intersection. + */ +#include +#include +#include +#include +#include + +/* Normally use here to get the installed libpng, but this is done to + * ensure the code picks up the local libpng implementation: + */ +#include "../../png.h" + +#if defined(PNG_SIMPLIFIED_WRITE_SUPPORTED) && defined(PNG_STDIO_SUPPORTED) + +static const struct color +{ + const char *name; + double red; + double green; + double blue; +} colors[] = +/* color ::= black|white|red|green|yellow|blue + * color ::= brown|purple|pink|orange|gray|cyan + */ +{ + { "black", 0, 0, 0 }, + { "white", 1, 1, 1 }, + { "red", 1, 0, 0 }, + { "green", 0, 1, 0 }, + { "yellow", 1, 1, 0 }, + { "blue", 0, 0, 1 }, + { "brown", .5, .125, 0 }, + { "purple", 1, 0, 1 }, + { "pink", 1, .5, .5 }, + { "orange", 1, .5, 0 }, + { "gray", 0, .5, .5 }, + { "cyan", 0, 1, 1 } +}; +#define color_count ((sizeof colors)/(sizeof colors[0])) + +static const struct color * +color_of(const char *arg) +{ + int icolor = color_count; + + while (--icolor >= 0) + { + if (strcmp(colors[icolor].name, arg) == 0) + return colors+icolor; + } + + fprintf(stderr, "genpng: invalid color %s\n", arg); + exit(1); +} + +static double +width_of(const char *arg) +{ + if (strcmp(arg, "filled") == 0) + return 0; + + else + { + char *ep = NULL; + double w = strtod(arg, &ep); + + if (ep != NULL && *ep == 0 && w > 0) + return w; + } + + fprintf(stderr, "genpng: invalid line width %s\n", arg); + exit(1); +} + +static double +coordinate_of(const char *arg) +{ + char *ep = NULL; + double w = strtod(arg, &ep); + + if (ep != NULL && *ep == 0) + return w; + + fprintf(stderr, "genpng: invalid coordinate value %s\n", arg); + exit(1); +} + +struct arg; /* forward declaration */ + +typedef int (*shape_fn_ptr)(const struct arg *arg, double x, double y); + /* A function to determine if (x,y) is inside the shape. + * + * There are two implementations: + * + * inside_fn: returns true if the point is inside + * check_fn: returns; + * -1: the point is outside the shape by more than the filter width (2) + * 0: the point may be inside the shape + * +1: the point is inside the shape by more than the filter width + */ +#define OUTSIDE (-1) +#define INSIDE (1) + +struct arg +{ + const struct color *color; + shape_fn_ptr inside_fn; + shape_fn_ptr check_fn; + double width; /* line width, 0 for 'filled' */ + double x1, y1, x2, y2; +}; + +/* IMPLEMENTATION NOTE: + * + * We want the contribution of each shape to the sample corresponding to each + * pixel. This could be obtained by super sampling the image to infinite + * dimensions, finding each point within the shape and assigning that a value + * '1' while leaving every point outside the shape with value '0' then + * downsampling to the image size with sinc; computationally very expensive. + * + * Approximations are as follows: + * + * 1) If the pixel coordinate is within the shape assume the sample has the + * shape color and is opaque, else assume there is no contribution from + * the shape. + * + * This is the equivalent of aliased rendering or resampling an image with + * a block filter. The maximum error in the calculated alpha (which will + * always be 0 or 1) is 0.5. + * + * 2) If the shape is within a square of size 1x1 centered on the pixel assume + * that the shape obscures an amount of the pixel equal to its area within + * that square. + * + * This is the equivalent of 'pixel coverage' alpha calculation or resampling + * an image with a bi-linear filter. The maximum error is over 0.2, but the + * results are often acceptable. + * + * This can be approximated by applying (1) to a super-sampled image then + * downsampling with a bi-linear filter. The error in the super-sampled + * image is 0.5 per sample, but the resampling reduces this. + * + * 3) Use a better filter with a super-sampled image; in the limit this is the + * sinc() approach. + * + * 4) Do the geometric calculation; a bivariate definite integral across the + * shape, unfortunately this means evaluating Si(x), the integral of sinc(x), + * which is still a lot of math. + * + * This code uses approach (3) with a bi-cubic filter and 8x super-sampling + * and method (1) for the super-samples. This means that the sample is either + * 0 or 1, depending on whether the sub-pixel is within or outside the shape. + * The bi-cubic weights are also fixed and the 16 required weights are + * pre-computed here (note that the 'scale' setting will need to be changed if + * 'super' is increased). + * + * The code also calculates a sum to the edge of the filter. This is not + * currently used by could be used to optimize the calculation. + */ +#if 0 /* bc code */ +scale=10 +super=8 +define bicubic(x) { + if (x <= 1) return (1.5*x - 2.5)*x*x + 1; + if (x < 2) return (((2.5 - 0.5*x)*x - 4)*x + 2); + return 0; +} +define sum(x) { + auto s; + s = 0; + while (x < 2*super) { + s = s + bicubic(x/super); + x = x + 1; + } + return s; +} +define results(x) { + auto b, s; + b = bicubic(x/super); + s = sum(x); + + print " /*", x, "*/ { ", b, ", ", s, " }"; + return 1; +} +x=0 +while (x<2*super) { + x = x + results(x) + if (x < 2*super) print "," + print "\n" +} +quit +#endif + +#define BICUBIC1(x) /* |x| <= 1 */ ((1.5*(x)* - 2.5)*(x)*(x) + 1) +#define BICUBIC2(x) /* 1 < |x| < 2 */ (((2.5 - 0.5*(x))*(x) - 4)*(x) + 2) +#define FILTER_WEIGHT 9 /* Twice the first sum below */ +#define FILTER_WIDTH 2 /* Actually half the width; -2..+2 */ +#define FILTER_STEPS 8 /* steps per filter unit */ +static const double +bicubic[16][2] = +{ + /* These numbers are exact; the weight for the filter is 1/9, but this + * would make the numbers inexact, so it is not included here. + */ + /* bicubic sum */ + /* 0*/ { 1.0000000000, 4.5000000000 }, + /* 1*/ { .9638671875, 3.5000000000 }, + /* 2*/ { .8671875000, 2.5361328125 }, + /* 3*/ { .7275390625, 1.6689453125 }, + /* 4*/ { .5625000000, .9414062500 }, + /* 5*/ { .3896484375, .3789062500 }, + /* 6*/ { .2265625000, -.0107421875 }, + /* 7*/ { .0908203125, -.2373046875 }, + /* 8*/ { 0, -.3281250000 }, + /* 9*/ { -.0478515625, -.3281250000 }, + /*10*/ { -.0703125000, -.2802734375 }, + /*11*/ { -.0732421875, -.2099609375 }, + /*12*/ { -.0625000000, -.1367187500 }, + /*13*/ { -.0439453125, -.0742187500 }, + /*14*/ { -.0234375000, -.0302734375 }, + /*15*/ { -.0068359375, -.0068359375 } +}; + +static double +alpha_calc(const struct arg *arg, double x, double y) +{ + /* For [x-2..x+2],[y-2,y+2] calculate the weighted bicubic given a function + * which tells us whether a point is inside or outside the shape. First + * check if we need to do this at all: + */ + switch (arg->check_fn(arg, x, y)) + { + case OUTSIDE: + return 0; /* all samples outside the shape */ + + case INSIDE: + return 1; /* all samples inside the shape */ + + default: + { + int dy; + double alpha = 0; + +# define FILTER_D (FILTER_WIDTH*FILTER_STEPS-1) + for (dy=-FILTER_D; dy<=FILTER_D; ++dy) + { + double wy = bicubic[abs(dy)][0]; + + if (wy != 0) + { + double alphay = 0; + int dx; + + for (dx=-FILTER_D; dx<=FILTER_D; ++dx) + { + double wx = bicubic[abs(dx)][0]; + + if (wx != 0 && arg->inside_fn(arg, x+dx/16, y+dy/16)) + alphay += wx; + } + + alpha += wy * alphay; + } + } + + /* This needs to be weighted for each dimension: */ + return alpha / (FILTER_WEIGHT*FILTER_WEIGHT); + } + } +} + +/* These are the shape functions. */ +/* "square", + * { inside_square_filled, check_square_filled }, + * { inside_square, check_square } + */ +static int +square_check(double x, double y, double x1, double y1, double x2, double y2) + /* Is x,y inside the square (x1,y1)..(x2,y2)? */ +{ + /* Do a modified Cohen-Sutherland on one point, bit patterns that indicate + * 'outside' are: + * + * xx1, arg->y1, arg->x2, arg->y2); +} + +static int +square_check_line(const struct arg *arg, double x, double y, double w) + /* Check for a point being inside the boundaries implied by the given arg + * and assuming a width 2*w each side of the boundaries. This returns the + * 'check' INSIDE/OUTSIDE/0 result but note the semantics: + * + * +--------------+ + * | | OUTSIDE + * | INSIDE | + * | | + * +--------------+ + * + * And '0' means within the line boundaries. + */ +{ + double cx = (arg->x1+arg->x2)/2; + double wx = fabs(arg->x1-arg->x2)/2; + double cy = (arg->y1+arg->y2)/2; + double wy = fabs(arg->y1-arg->y2)/2; + + if (square_check(x, y, cx-wx-w, cy-wy-w, cx+wx+w, cy+wy+w)) + { + /* Inside, but maybe too far; check for the redundant case where + * the lines overlap: + */ + wx -= w; + wy -= w; + if (wx > 0 && wy > 0 && square_check(x, y, cx-wx, cy-wy, cx+wx, cy+wy)) + return INSIDE; /* between (inside) the boundary lines. */ + + return 0; /* inside the lines themselves. */ + } + + return OUTSIDE; /* outside the boundary lines. */ +} + +static int +check_square_filled(const struct arg *arg, double x, double y) +{ + /* The filter extends +/-FILTER_WIDTH each side of each output point, so + * the check has to expand and contract the square by that amount; '0' + * means close enough to the edge of the square that the bicubic filter has + * to be run, OUTSIDE means alpha==0, INSIDE means alpha==1. + */ + return square_check_line(arg, x, y, FILTER_WIDTH); +} + +static int +inside_square(const struct arg *arg, double x, double y) +{ + /* Return true if within the drawn lines, else false, no need to distinguish + * INSIDE vs OUTSIDE here: + */ + return square_check_line(arg, x, y, arg->width/2) == 0; +} + +static int +check_square(const struct arg *arg, double x, double y) +{ + /* So for this function a result of 'INSIDE' means inside the actual lines. + */ + double w = arg->width/2; + + if (square_check_line(arg, x, y, w+FILTER_WIDTH) == 0) + { + /* Somewhere close to the boundary lines. If far enough inside one of + * them then we can return INSIDE: + */ + w -= FILTER_WIDTH; + + if (w > 0 && square_check_line(arg, x, y, w) == 0) + return INSIDE; + + /* Point is somewhere in the filter region: */ + return 0; + } + + else /* Inside or outside the square by more than w+FILTER_WIDTH. */ + return OUTSIDE; +} + +/* "circle", + * { inside_circle_filled, check_circle_filled }, + * { inside_circle, check_circle } + * + * The functions here are analoguous to the square ones; however, they check + * the corresponding ellipse as opposed to the rectangle. + */ +static int +circle_check(double x, double y, double x1, double y1, double x2, double y2) +{ + if (square_check(x, y, x1, y1, x2, y2)) + { + /* Inside the square, so maybe inside the circle too: */ + const double cx = (x1 + x2)/2; + const double cy = (y1 + y2)/2; + const double dx = x1 - x2; + const double dy = y1 - y2; + + x = (x - cx)/dx; + y = (y - cy)/dy; + + /* It is outside if the distance from the center is more than half the + * diameter: + */ + return x*x+y*y < .25; + } + + return 0; /* outside */ +} + +static int +inside_circle_filled(const struct arg *arg, double x, double y) +{ + return circle_check(x, y, arg->x1, arg->y1, arg->x2, arg->y2); +} + +static int +circle_check_line(const struct arg *arg, double x, double y, double w) + /* Check for a point being inside the boundaries implied by the given arg + * and assuming a width 2*w each side of the boundaries. This function has + * the same semantic as square_check_line but tests the circle. + */ +{ + double cx = (arg->x1+arg->x2)/2; + double wx = fabs(arg->x1-arg->x2)/2; + double cy = (arg->y1+arg->y2)/2; + double wy = fabs(arg->y1-arg->y2)/2; + + if (circle_check(x, y, cx-wx-w, cy-wy-w, cx+wx+w, cy+wy+w)) + { + /* Inside, but maybe too far; check for the redundant case where + * the lines overlap: + */ + wx -= w; + wy -= w; + if (wx > 0 && wy > 0 && circle_check(x, y, cx-wx, cy-wy, cx+wx, cy+wy)) + return INSIDE; /* between (inside) the boundary lines. */ + + return 0; /* inside the lines themselves. */ + } + + return OUTSIDE; /* outside the boundary lines. */ +} + +static int +check_circle_filled(const struct arg *arg, double x, double y) +{ + return circle_check_line(arg, x, y, FILTER_WIDTH); +} + +static int +inside_circle(const struct arg *arg, double x, double y) +{ + return circle_check_line(arg, x, y, arg->width/2) == 0; +} + +static int +check_circle(const struct arg *arg, double x, double y) +{ + /* Exactly as the 'square' code. */ + double w = arg->width/2; + + if (circle_check_line(arg, x, y, w+FILTER_WIDTH) == 0) + { + w -= FILTER_WIDTH; + + if (w > 0 && circle_check_line(arg, x, y, w) == 0) + return INSIDE; + + /* Point is somewhere in the filter region: */ + return 0; + } + + else /* Inside or outside the square by more than w+FILTER_WIDTH. */ + return OUTSIDE; +} + +/* "line", + * { NULL, NULL }, There is no 'filled' line. + * { inside_line, check_line } + */ +static int +line_check(double x, double y, double x1, double y1, double x2, double y2, + double w, double expand) +{ + /* Shift all the points to (arg->x1, arg->y1) */ + double lx = x2 - x1; + double ly = y2 - y1; + double len2 = lx*lx + ly*ly; + double cross, dot; + + x -= x1; + y -= y1; + + /* The dot product is the distance down the line, the cross product is + * the distance away from the line: + * + * distance = |cross| / sqrt(len2) + */ + cross = x * ly - y * lx; + + /* If 'distance' is more than w the point is definitely outside the line: + * + * distance >= w + * |cross| >= w * sqrt(len2) + * cross^2 >= w^2 * len2: + */ + if (cross*cross >= (w+expand)*(w+expand)*len2) + return 0; /* outside */ + + /* Now find the distance *along* the line; this comes from the dot product + * lx.x+ly.y. The actual distance (in pixels) is: + * + * distance = dot / sqrt(len2) + */ + dot = lx * x + ly * y; + + /* The test for 'outside' is: + * + * distance < 0 || distance > sqrt(len2) + * -> dot / sqrt(len2) > sqrt(len2) + * -> dot > len2 + * + * But 'expand' is used for the filter width and needs to be handled too: + */ + return dot > -expand && dot < len2+expand; +} + +static int +inside_line(const struct arg *arg, double x, double y) +{ + return line_check(x, y, arg->x1, arg->y1, arg->x2, arg->y2, arg->width/2, 0); +} + +static int +check_line(const struct arg *arg, double x, double y) +{ + /* The end caps of the line must be checked too; it's not enough just to + * widen the line by FILTER_WIDTH; 'expand' exists for this purpose: + */ + if (line_check(x, y, arg->x1, arg->y1, arg->x2, arg->y2, arg->width/2, + FILTER_WIDTH)) + { + /* Inside the line+filter; far enough inside that the filter isn't + * required? + */ + if (arg->width > 2*FILTER_WIDTH && + line_check(x, y, arg->x1, arg->y1, arg->x2, arg->y2, arg->width/2, + -FILTER_WIDTH)) + return INSIDE; + + return 0; + } + + return OUTSIDE; +} + +static const struct +{ + const char *name; + shape_fn_ptr function[2/*fill,line*/][2]; +# define FN_INSIDE 0 +# define FN_CHECK 1 +} shape_defs[] = +{ + { "square", + { { inside_square_filled, check_square_filled }, + { inside_square, check_square } } + }, + { "circle", + { { inside_circle_filled, check_circle_filled }, + { inside_circle, check_circle } } + }, + { "line", + { { NULL, NULL }, + { inside_line, check_line } } + } +}; + +#define shape_count ((sizeof shape_defs)/(sizeof shape_defs[0])) + +static shape_fn_ptr +shape_of(const char *arg, double width, int f) +{ + unsigned int i; + + for (i=0; icolor = color_of(argv[0]); + arg->width = width_of(argv[1]); + arg->inside_fn = shape_of(argv[2], arg->width, FN_INSIDE); + arg->check_fn = shape_of(argv[2], arg->width, FN_CHECK); + arg->x1 = coordinate_of(argv[3]); + arg->y1 = coordinate_of(argv[4]); + arg->x2 = coordinate_of(argv[5]); + arg->y2 = coordinate_of(argv[6]); +} + +static png_uint_32 +read_wh(const char *name, const char *str) + /* read a PNG width or height */ +{ + char *ep = NULL; + unsigned long ul = strtoul(str, &ep, 10); + + if (ep != NULL && *ep == 0 && ul > 0 && ul <= 0x7fffffff) + return (png_uint_32)/*SAFE*/ul; + + fprintf(stderr, "genpng: %s: invalid number %s\n", name, str); + exit(1); +} + +static void +pixel(png_uint_16p p, struct arg *args, int nargs, double x, double y) +{ + /* Fill in the pixel by checking each shape (args[nargs]) for effects on + * the corresponding sample: + */ + double r=0, g=0, b=0, a=0; + + while (--nargs >= 0 && a != 1) + { + /* NOTE: alpha_calc can return a value outside the range 0..1 with the + * bicubic filter. + */ + const double alpha = alpha_calc(args+nargs, x, y) * (1-a); + + r += alpha * args[nargs].color->red; + g += alpha * args[nargs].color->green; + b += alpha * args[nargs].color->blue; + a += alpha; + } + + /* 'a' may be negative or greater than 1; if it is, negative clamp the + * pixel to 0 if >1 clamp r/g/b: + */ + if (a > 0) + { + if (a > 1) + { + if (r > 1) r = 1; + if (g > 1) g = 1; + if (b > 1) b = 1; + a = 1; + } + + /* And fill in the pixel: */ + p[0] = (png_uint_16)/*SAFE*/round(r * 65535); + p[1] = (png_uint_16)/*SAFE*/round(g * 65535); + p[2] = (png_uint_16)/*SAFE*/round(b * 65535); + p[3] = (png_uint_16)/*SAFE*/round(a * 65535); + } + + else + p[3] = p[2] = p[1] = p[0] = 0; +} + +int +main(int argc, const char **argv) +{ + int convert_to_8bit = 0; + + /* There is one option: --8bit: */ + if (argc > 1 && strcmp(argv[1], "--8bit") == 0) + --argc, ++argv, convert_to_8bit = 1; + + if (argc >= 3) + { + png_uint_16p buffer; + int nshapes; + png_image image; +# define max_shapes 256 + struct arg arg_list[max_shapes]; + + /* The libpng Simplified API write code requires a fully initialized + * structure. + */ + memset(&image, 0, sizeof image); + image.version = PNG_IMAGE_VERSION; + image.opaque = NULL; + image.width = read_wh("width", argv[1]); + image.height = read_wh("height", argv[2]); + image.format = PNG_FORMAT_LINEAR_RGB_ALPHA; + image.flags = 0; + image.colormap_entries = 0; + + /* Check the remainder of the arguments */ + for (nshapes=0; 3+7*(nshapes+1) <= argc && nshapes < max_shapes; + ++nshapes) + parse_arg(arg_list+nshapes, argv+3+7*nshapes); + + if (3+7*nshapes != argc) + { + fprintf(stderr, "genpng: %s: too many arguments\n", argv[3+7*nshapes]); + return 1; + } + +#if 1 + /* TO do: determine whether this guard against overflow is necessary. + * This comment in png.h indicates that it should be safe: "libpng will + * refuse to process an image where such an overflow would occur", but + * I don't see where the image gets rejected when the buffer is too + * large before the malloc is attempted. + */ + if (image.height > ((size_t)(-1))/(8*image.width)) { + fprintf(stderr, "genpng: image buffer would be too big"); + return 1; + } +#endif + + /* Create the buffer: */ + buffer = malloc(PNG_IMAGE_SIZE(image)); + + if (buffer != NULL) + { + png_uint_32 y; + + /* Write each row... */ + for (y=0; y\n" + " shape ::= circle|square|line\n" + " x1,x2 ::= \n" + " y1,y2 ::= \n" + "\n" + " Numbers are floating point numbers describing points relative to\n" + " the top left of the output PNG as pixel coordinates. The 'width'\n" + " parameter is either the width of the line (in output pixels) used\n" + " to draw the shape or 'filled' to indicate that the shape should\n" + " be filled with the color.\n" + "\n" + " Colors are interpreted loosely to give access to the eight full\n" + " intensity RGB values:\n" + "\n" + " black, red, green, blue, yellow, cyan, purple, white,\n" + "\n" + " Cyan is full intensity blue+green; RGB(0,1,1), plus the following\n" + " lower intensity values:\n" + "\n" + " brown: red+orange: RGB(0.5, 0.125, 0) (dark red+orange)\n" + " pink: red+white: RGB(1.0, 0.5, 0.5)\n" + " orange: red+yellow: RGB(1.0, 0.5, 0)\n" + " gray: black+white: RGB(0.5, 0.5, 0.5)\n" + "\n" + " The RGB values are selected to make detection of aliasing errors\n" + " easy. The names are selected to make the description of errors\n" + " easy.\n" + "\n" + " The PNG is written to stdout, if --8bit is given a 32bpp RGBA sRGB\n" + " file is produced, otherwise a 64bpp RGBA linear encoded file is\n" + " written.\n"); + } + + return 1; +} +#endif /* SIMPLIFIED_WRITE && STDIO */ diff --git a/extern/libpng/contrib/tools/intgamma.sh b/extern/libpng/contrib/tools/intgamma.sh new file mode 100755 index 0000000000..41c5d6dd27 --- /dev/null +++ b/extern/libpng/contrib/tools/intgamma.sh @@ -0,0 +1,110 @@ +#!/bin/sh +# +# intgamma.sh +# +# Last changed in libpng 1.6.0 [February 14, 2013] +# +# COPYRIGHT: Written by John Cunningham Bowler, 2013. +# To the extent possible under law, the author has waived all copyright and +# related or neighboring rights to this work. This work is published from: +# United States. +# +# Shell script to generate png.c 8-bit and 16-bit log tables (see the code in +# png.c for details). +# +# This script uses the "bc" arbitrary precision calculator to calculate 32-bit +# fixed point values of logarithms appropriate to finding the log of an 8-bit +# (0..255) value and a similar table for the exponent calculation. +# +# "bc" must be on the path when the script is executed, and the math library +# (-lm) must be available +# +# function to print out a list of numbers as integers; the function truncates +# the integers which must be one-per-line +function print(){ + awk 'BEGIN{ + str = "" + } + { + sub("\\.[0-9]*$", "") + if ($0 == "") + $0 = "0" + + if (str == "") + t = " " $0 "U" + else + t = str ", " $0 "U" + + if (length(t) >= 80) { + print str "," + str = " " $0 "U" + } else + str = t + } + END{ + print str + }' +} +# +# The logarithm table. +cat <= 2^32) x = 2^32-1; + x; +} +END +echo '};' +echo +# +# And the table of adjustment values. +cat <=0;--i){ + (1 - e(-(2^i)/65536*l(2))) * 2^(32-i) +} +END +echo '#endif' diff --git a/extern/libpng/contrib/tools/makesRGB.c b/extern/libpng/contrib/tools/makesRGB.c new file mode 100644 index 0000000000..d0c0ca9314 --- /dev/null +++ b/extern/libpng/contrib/tools/makesRGB.c @@ -0,0 +1,430 @@ +/* makesRGB.c -- build sRGB-to-linear and linear-to-sRGB conversion tables + * + * Last changed in libpng 1.6.0 [February 14, 2013] + * + * COPYRIGHT: Written by John Cunningham Bowler, 2013. + * To the extent possible under law, the author has waived all copyright and + * related or neighboring rights to this work. This work is published from: + * United States. + * + * Make a table to convert 8-bit sRGB encoding values into the closest 16-bit + * linear value. + * + * Make two tables to take a linear value scaled to 255*65535 and return an + * approximation to the 8-bit sRGB encoded value. Calculate the error in these + * tables and display it. + */ +#define _C99_SOURCE 1 +#include +#include +#include + +/* pngpriv.h includes the definition of 'PNG_sRGB_FROM_LINEAR' which is required + * to verify the actual code. + */ +#include "../../pngpriv.h" + +#include "sRGB.h" + +/* The tables are declared 'const' in pngpriv.h, so this redefines the tables to + * be used. + */ +#define png_sRGB_table sRGB_table +#define png_sRGB_base sRGB_base +#define png_sRGB_delta sRGB_delta + +static png_uint_16 png_sRGB_table[256]; +static png_uint_16 png_sRGB_base[512]; +static png_byte png_sRGB_delta[512]; + +static const unsigned int max_input = 255*65535; + +double +fsRGB(double l) +{ + return sRGB_from_linear(l/max_input); +} + +double +sRGB(unsigned int i) +{ + return fsRGB(i); +} + +double +finvsRGB(unsigned int i) +{ + return 65535 * linear_from_sRGB(i/255.); +} + +png_uint_16 +invsRGB(unsigned int i) +{ + unsigned int x = nearbyint(finvsRGB(i)); + + if (x > 65535) + { + fprintf(stderr, "invsRGB(%u) overflows to %u\n", i, x); + exit(1); + } + + return (png_uint_16)x; +} + +int +main(int argc, char **argv) +{ + unsigned int i, i16, ibase; + double min_error = 0; + double max_error = 0; + double min_error16 = 0; + double max_error16 = 0; + double adjust; + double adjust_lo = 0.4, adjust_hi = 0.6, adjust_mid = 0.5; + unsigned int ec_lo = 0, ec_hi = 0, ec_mid = 0; + unsigned int error_count = 0; + unsigned int error_count16 = 0; + int test_only = 0; + + if (argc > 1) + test_only = strcmp("--test", argv[1]) == 0; + + /* Initialize the encoding table first. */ + for (i=0; i<256; ++i) + { + png_sRGB_table[i] = invsRGB(i); + } + + /* Now work out the decoding tables (this is where the error comes in because + * there are 512 set points and 512 straight lines between them.) + */ + for (;;) + { + if (ec_lo == 0) + adjust = adjust_lo; + + else if (ec_hi == 0) + adjust = adjust_hi; + + else if (ec_mid == 0) + adjust = adjust_mid; + + else if (ec_mid < ec_hi) + adjust = (adjust_mid + adjust_hi)/2; + + else if (ec_mid < ec_lo) + adjust = (adjust_mid + adjust_lo)/2; + + else + { + fprintf(stderr, "not reached: %u .. %u .. %u\n", ec_lo, ec_mid, ec_hi); + exit(1); + } + + /* Calculate the table using the current 'adjust' */ + for (i=0; i<=511; ++i) + { + double lo = 255 * sRGB(i << 15); + double hi = 255 * sRGB((i+1) << 15); + unsigned int calc; + + calc = nearbyint((lo+adjust) * 256); + if (calc > 65535) + { + fprintf(stderr, "table[%d][0]: overflow %08x (%d)\n", i, calc, + calc); + exit(1); + } + png_sRGB_base[i] = calc; + + calc = nearbyint((hi-lo) * 32); + if (calc > 255) + { + fprintf(stderr, "table[%d][1]: overflow %08x (%d)\n", i, calc, + calc); + exit(1); + } + png_sRGB_delta[i] = calc; + } + + /* Check the 16-bit linear values alone: */ + error_count16 = 0; + for (i16=0; i16 <= 65535; ++i16) + { + unsigned int i = 255*i16; + unsigned int iexact = nearbyint(255*sRGB(i)); + unsigned int icalc = PNG_sRGB_FROM_LINEAR(i); + + if (icalc != iexact) + ++error_count16; + } + + /* Now try changing the adjustment. */ + if (ec_lo == 0) + ec_lo = error_count16; + + else if (ec_hi == 0) + ec_hi = error_count16; + + else if (ec_mid == 0) + { + ec_mid = error_count16; + printf("/* initial error counts: %u .. %u .. %u */\n", ec_lo, ec_mid, + ec_hi); + } + + else if (error_count16 < ec_mid) + { + printf("/* adjust (mid ): %f: %u -> %u */\n", adjust, ec_mid, + error_count16); + ec_mid = error_count16; + adjust_mid = adjust; + } + + else if (adjust < adjust_mid && error_count16 < ec_lo) + { + printf("/* adjust (low ): %f: %u -> %u */\n", adjust, ec_lo, + error_count16); + ec_lo = error_count16; + adjust_lo = adjust; + } + + else if (adjust > adjust_mid && error_count16 < ec_hi) + { + printf("/* adjust (high): %f: %u -> %u */\n", adjust, ec_hi, + error_count16); + ec_hi = error_count16; + adjust_hi = adjust; + } + + else + { + adjust = adjust_mid; + printf("/* adjust: %f: %u */\n", adjust, ec_mid); + break; + } + } + + /* For each entry in the table try to adjust it to minimize the error count + * in that entry. Each entry corresponds to 128 input values. + */ + for (ibase=0; ibase<65536; ibase+=128) + { + png_uint_16 base = png_sRGB_base[ibase >> 7], trybase = base, ob=base; + png_byte delta = png_sRGB_delta[ibase >> 7], trydelta = delta, od=delta; + unsigned int ecbase = 0, eco; + + for (;;) + { + png_sRGB_base[ibase >> 7] = trybase; + png_sRGB_delta[ibase >> 7] = trydelta; + + /* Check the 16-bit linear values alone: */ + error_count16 = 0; + for (i16=ibase; i16 < ibase+128; ++i16) + { + unsigned int i = 255*i16; + unsigned int iexact = nearbyint(255*sRGB(i)); + unsigned int icalc = PNG_sRGB_FROM_LINEAR(i); + + if (icalc != iexact) + ++error_count16; + } + + if (error_count16 == 0) + break; + + if (ecbase == 0) + { + eco = ecbase = error_count16; + ++trybase; /* First test */ + } + + else if (error_count16 < ecbase) + { + if (trybase > base) + { + base = trybase; + ++trybase; + } + else if (trybase < base) + { + base = trybase; + --trybase; + } + else if (trydelta > delta) + { + delta = trydelta; + ++trydelta; + } + else if (trydelta < delta) + { + delta = trydelta; + --trydelta; + } + else + { + fprintf(stderr, "makesRGB: impossible\n"); + exit(1); + } + ecbase = error_count16; + } + + else + { + if (trybase > base) + trybase = base-1; + else if (trybase < base) + { + trybase = base; + ++trydelta; + } + else if (trydelta > delta) + trydelta = delta-1; + else if (trydelta < delta) + break; /* end of tests */ + } + } + + png_sRGB_base[ibase >> 7] = base; + png_sRGB_delta[ibase >> 7] = delta; + if (base != ob || delta != od) + { + printf("/* table[%u]={%u,%u} -> {%u,%u} %u -> %u errors */\n", + ibase>>7, ob, od, base, delta, eco, ecbase); + } + else if (0) + printf("/* table[%u]={%u,%u} %u errors */\n", ibase>>7, ob, od, + ecbase); + } + + /* Only do the full (slow) test at the end: */ + min_error = -.4999; + max_error = .4999; + error_count = 0; + + for (i=0; i <= max_input; ++i) + { + unsigned int iexact = nearbyint(255*sRGB(i)); + unsigned int icalc = PNG_sRGB_FROM_LINEAR(i); + + if (icalc != iexact) + { + double err = 255*sRGB(i) - icalc; + + if (err > (max_error+.001) || err < (min_error-.001)) + { + printf( + "/* 0x%08x: exact: %3d, got: %3d [tables: %08x, %08x] (%f) */\n", + i, iexact, icalc, png_sRGB_base[i>>15], + png_sRGB_delta[i>>15], err); + } + + ++error_count; + if (err > max_error) + max_error = err; + else if (err < min_error) + min_error = err; + } + } + + /* Re-check the 16-bit cases too, including the warning if there is an error + * bigger than 1. + */ + error_count16 = 0; + max_error16 = 0; + min_error16 = 0; + for (i16=0; i16 <= 65535; ++i16) + { + unsigned int i = 255*i16; + unsigned int iexact = nearbyint(255*sRGB(i)); + unsigned int icalc = PNG_sRGB_FROM_LINEAR(i); + + if (icalc != iexact) + { + double err = 255*sRGB(i) - icalc; + + ++error_count16; + if (err > max_error16) + max_error16 = err; + else if (err < min_error16) + min_error16 = err; + + if (abs(icalc - iexact) > 1) + printf( + "/* 0x%04x: exact: %3d, got: %3d [tables: %08x, %08x] (%f) */\n", + i16, iexact, icalc, png_sRGB_base[i>>15], + png_sRGB_delta[i>>15], err); + } + } + + /* Check the round trip for each 8-bit sRGB value. */ + for (i16=0; i16 <= 255; ++i16) + { + unsigned int i = 255 * png_sRGB_table[i16]; + unsigned int iexact = nearbyint(255*sRGB(i)); + unsigned int icalc = PNG_sRGB_FROM_LINEAR(i); + + if (i16 != iexact) + { + fprintf(stderr, "8-bit rounding error: %d -> %d\n", i16, iexact); + exit(1); + } + + if (icalc != i16) + { + double finv = finvsRGB(i16); + + printf("/* 8-bit roundtrip error: %d -> %f -> %d(%f) */\n", + i16, finv, icalc, fsRGB(255*finv)); + } + } + + + printf("/* error: %g - %g, %u (%g%%) of readings inexact */\n", + min_error, max_error, error_count, (100.*error_count)/max_input); + printf("/* 16-bit error: %g - %g, %u (%g%%) of readings inexact */\n", + min_error16, max_error16, error_count16, (100.*error_count16)/65535); + + if (!test_only) + { + printf("const png_uint_16 png_sRGB_table[256] =\n{\n "); + for (i=0; i<255; ) + { + do + { + printf("%d,", png_sRGB_table[i++]); + } + while ((i & 0x7) != 0 && i<255); + if (i<255) printf("\n "); + } + printf("%d\n};\n\n", png_sRGB_table[i]); + + + printf("const png_uint_16 png_sRGB_base[512] =\n{\n "); + for (i=0; i<511; ) + { + do + { + printf("%d,", png_sRGB_base[i++]); + } + while ((i & 0x7) != 0 && i<511); + if (i<511) printf("\n "); + } + printf("%d\n};\n\n", png_sRGB_base[i]); + + printf("const png_byte png_sRGB_delta[512] =\n{\n "); + for (i=0; i<511; ) + { + do + { + printf("%d,", png_sRGB_delta[i++]); + } + while ((i & 0xf) != 0 && i<511); + if (i<511) printf("\n "); + } + printf("%d\n};\n\n", png_sRGB_delta[i]); + } + + return 0; +} diff --git a/extern/libpng/contrib/tools/png-fix-itxt.c b/extern/libpng/contrib/tools/png-fix-itxt.c new file mode 100644 index 0000000000..c7654c1136 --- /dev/null +++ b/extern/libpng/contrib/tools/png-fix-itxt.c @@ -0,0 +1,164 @@ + +/* png-fix-itxt version 1.0.0 + * + * Copyright 2015 Glenn Randers-Pehrson + * Last changed in libpng 1.6.18 [July 23, 2015] + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + * + * Usage: + * + * png-fix-itxt.exe < bad.png > good.png + * + * Fixes a PNG file written with libpng-1.6.0 or 1.6.1 that has one or more + * uncompressed iTXt chunks. Assumes that the actual length is greater + * than or equal to the value in the length byte, and that the CRC is + * correct for the actual length. This program hunts for the CRC and + * adjusts the length byte accordingly. It is not an error to process a + * PNG file that has no iTXt chunks or one that has valid iTXt chunks; + * such files will simply be copied. + * + * Requires zlib (for crc32 and Z_NULL); build with + * + * gcc -O -o png-fix-itxt png-fix-itxt.c -lz + * + * If you need to handle iTXt chunks larger than 500000 kbytes you must + * rebuild png-fix-itxt with a larger values of MAX_LENGTH (or a smaller value + * if you know you will never encounter such huge iTXt chunks). + */ + +#include +#include + +#define MAX_LENGTH 500000 + +/* Read one character (inchar), also return octet (c), break if EOF */ +#define GETBREAK inchar=getchar(); \ + c=(inchar & 0xffU);\ + if (inchar != c) break +int +main(void) +{ + unsigned int i; + unsigned char buf[MAX_LENGTH]; + unsigned long crc; + unsigned char c; + int inchar; + +/* Skip 8-byte signature */ + for (i=8; i; i--) + { + GETBREAK; + putchar(c); + } + +if (inchar == c) /* !EOF */ +for (;;) + { + /* Read the length */ + unsigned long length; /* must be 32 bits! */ + GETBREAK; buf[0] = c; length = c; length <<= 8; + GETBREAK; buf[1] = c; length += c; length <<= 8; + GETBREAK; buf[2] = c; length += c; length <<= 8; + GETBREAK; buf[3] = c; length += c; + + /* Read the chunkname */ + GETBREAK; buf[4] = c; + GETBREAK; buf[5] = c; + GETBREAK; buf[6] = c; + GETBREAK; buf[7] = c; + + + /* The iTXt chunk type expressed as integers is (105, 84, 88, 116) */ + if (buf[4] == 105 && buf[5] == 84 && buf[6] == 88 && buf[7] == 116) + { + if (length >= MAX_LENGTH-12) + break; /* To do: handle this more gracefully */ + + /* Initialize the CRC */ + crc = crc32(0, Z_NULL, 0); + + /* Copy the data bytes */ + for (i=8; i < length + 12; i++) + { + GETBREAK; buf[i] = c; + } + + if (inchar != c) /* EOF */ + break; + + /* Calculate the CRC */ + crc = crc32(crc, buf+4, (uInt)length+4); + + for (;;) + { + /* Check the CRC */ + if (((crc >> 24) & 0xffU) == buf[length+8] && + ((crc >> 16) & 0xffU) == buf[length+9] && + ((crc >> 8) & 0xffU) == buf[length+10] && + ((crc ) & 0xffU) == buf[length+11]) + break; + + length++; + + if (length >= MAX_LENGTH-12) + break; + + GETBREAK; + buf[length+11] = c; + + /* Update the CRC */ + crc = crc32(crc, buf+7+length, 1); + } + + if (inchar != c) /* EOF */ + break; + + /* Update length bytes */ + buf[0] = (unsigned char)((length >> 24) & 0xffU); + buf[1] = (unsigned char)((length >> 16) & 0xffU); + buf[2] = (unsigned char)((length >> 8) & 0xffU); + buf[3] = (unsigned char)((length ) & 0xffU); + + /* Write the fixed iTXt chunk (length, name, data, crc) */ + for (i=0; i +#endif + +#include + +/* Define the following to use this test against your installed libpng, rather + * than the one being built here: + */ +#ifdef PNG_FREESTANDING_TESTS +# include +#else +# include "../../png.h" +#endif + +#if PNG_LIBPNG_VER < 10700 + /* READ_PNG and WRITE_PNG were not defined, so: */ +# ifdef PNG_INFO_IMAGE_SUPPORTED +# ifdef PNG_SEQUENTIAL_READ_SUPPORTED +# define PNG_READ_PNG_SUPPORTED +# endif /* SEQUENTIAL_READ */ +# ifdef PNG_WRITE_SUPPORTED +# define PNG_WRITE_PNG_SUPPORTED +# endif /* WRITE */ +# endif /* INFO_IMAGE */ +#endif /* pre 1.7.0 */ + +#if (defined(PNG_READ_PNG_SUPPORTED)) && (defined(PNG_WRITE_PNG_SUPPORTED)) +#include +#include +#include +#include +#include +#include + +#include +#include + +#include + +#ifndef PNG_SETJMP_SUPPORTED +# include /* because png.h did *not* include this */ +#endif + +#ifdef __cplusplus +# define voidcast(type, value) static_cast(value) +#else +# define voidcast(type, value) (value) +#endif /* __cplusplus */ + +#ifdef __GNUC__ + /* Many versions of GCC erroneously report that local variables unmodified + * within the scope of a setjmp may be clobbered. This hacks round the + * problem (sometimes) without harming other compilers. + */ +# define gv volatile +#else +# define gv +#endif + +/* 'CLOCK_PROCESS_CPUTIME_ID' is one of the clock timers for clock_gettime. It + * need not be supported even when clock_gettime is available. It returns the + * 'CPU' time the process has consumed. 'CPU' time is assumed to include time + * when the CPU is actually blocked by a pending cache fill but not time + * waiting for page faults. The attempt is to get a measure of the actual time + * the implementation takes to read a PNG ignoring the potentially very large IO + * overhead. + */ +#ifdef PNG_PNGCP_TIMING_SUPPORTED +# include /* clock_gettime and associated definitions */ +# ifndef CLOCK_PROCESS_CPUTIME_ID + /* Prevent inclusion of the spurious code: */ +# undef PNG_PNGCP_TIMING_SUPPORTED +# endif +#endif /* PNGCP_TIMING */ + +/* So if the timing feature has been activated: */ + +/* This structure is used to control the test of a single file. */ +typedef enum +{ + VERBOSE, /* switches on all messages */ + INFORMATION, + WARNINGS, /* switches on warnings */ + LIBPNG_WARNING, + APP_WARNING, + ERRORS, /* just errors */ + APP_FAIL, /* continuable error - no need to longjmp */ + LIBPNG_ERROR, /* this and higher cause a longjmp */ + LIBPNG_BUG, /* erroneous behavior in libpng */ + APP_ERROR, /* such as out-of-memory in a callback */ + QUIET, /* no normal messages */ + USER_ERROR, /* such as file-not-found */ + INTERNAL_ERROR +} error_level; +#define LEVEL_MASK 0xf /* where the level is in 'options' */ + +#define STRICT 0x010 /* Fail on warnings as well as errors */ +#define LOG 0x020 /* Log pass/fail to stdout */ +#define CONTINUE 0x040 /* Continue on APP_FAIL errors */ +#define SIZES 0x080 /* Report input and output sizes */ +#define SEARCH 0x100 /* Search IDAT compression options */ +#define NOWRITE 0x200 /* Do not write an output file */ +#ifdef PNG_CHECK_FOR_INVALID_INDEX_SUPPORTED +# define IGNORE_INDEX 0x400 /* Ignore out of range palette indices (BAD!) */ +# ifdef PNG_GET_PALETTE_MAX_SUPPORTED +# define FIX_INDEX 0x800 /* 'Fix' out of range palette indices (OK) */ +# endif /* GET_PALETTE_MAX */ +#endif /* CHECK_FOR_INVALID_INDEX */ +#define OPTION 0x80000000 /* Used for handling options */ +#define LIST 0x80000001 /* Used for handling options */ + +/* Result masks apply to the result bits in the 'results' field below; these + * bits are simple 1U<operation = "internal error"; + dp->filename = "command line"; + dp->output_file = "no output file"; + dp->options = WARNINGS; /* default to !verbose, !quiet */ + dp->fp = NULL; + dp->read_pp = NULL; + dp->ip = NULL; + dp->write_pp = NULL; + dp->min_windowBits = -1; /* this is an OPTIND, so -1 won't match anything */ +# if PNG_LIBPNG_VER < 10700 && defined PNG_TEXT_SUPPORTED + dp->text_ptr = NULL; + dp->num_text = 0; + dp->text_stashed = 0; +# endif /* pre 1.7 */ +} + +static void +display_clean_read(struct display *dp) +{ + if (dp->read_pp != NULL) + png_destroy_read_struct(&dp->read_pp, NULL, NULL); + + if (dp->fp != NULL) + { + FILE *fp = dp->fp; + dp->fp = NULL; + (void)fclose(fp); + } +} + +static void +display_clean_write(struct display *dp) +{ + if (dp->fp != NULL) + { + FILE *fp = dp->fp; + dp->fp = NULL; + (void)fclose(fp); + } + + if (dp->write_pp != NULL) + png_destroy_write_struct(&dp->write_pp, dp->tsp > 0 ? NULL : &dp->ip); +} + +static void +display_clean(struct display *dp) +{ + display_clean_read(dp); + display_clean_write(dp); + dp->output_file = NULL; + +# if PNG_LIBPNG_VER < 10700 && defined PNG_TEXT_SUPPORTED + /* This is actually created and used by the write code, but only + * once; it has to be retained for subsequent writes of the same file. + */ + if (dp->text_stashed) + { + dp->text_stashed = 0; + dp->num_text = 0; + free(dp->text_ptr); + dp->text_ptr = NULL; + } +# endif /* pre 1.7 */ + + /* leave the filename for error detection */ + dp->results = 0; /* reset for next time */ +} + +static void +display_destroy(struct display *dp) +{ + /* Release any memory held in the display. */ + display_clean(dp); +} + +static struct display * +get_dp(png_structp pp) + /* The display pointer is always stored in the png_struct error pointer */ +{ + struct display *dp = (struct display*)png_get_error_ptr(pp); + + if (dp == NULL) + { + fprintf(stderr, "pngcp: internal error (no display)\n"); + exit(99); /* prevents a crash */ + } + + return dp; +} + +/* error handling */ +#ifdef __GNUC__ +# define VGATTR __attribute__((__format__ (__printf__,3,4))) + /* Required to quiet GNUC warnings when the compiler sees a stdarg function + * that calls one of the stdio v APIs. + */ +#else +# define VGATTR +#endif +static void VGATTR +display_log(struct display *dp, error_level level, const char *fmt, ...) + /* 'level' is as above, fmt is a stdio style format string. This routine + * does not return if level is above LIBPNG_WARNING + */ +{ + dp->results |= 1U << level; + + if (level > (error_level)(dp->options & LEVEL_MASK)) + { + const char *lp; + va_list ap; + + switch (level) + { + case INFORMATION: lp = "information"; break; + case LIBPNG_WARNING: lp = "warning(libpng)"; break; + case APP_WARNING: lp = "warning(pngcp)"; break; + case APP_FAIL: lp = "error(continuable)"; break; + case LIBPNG_ERROR: lp = "error(libpng)"; break; + case LIBPNG_BUG: lp = "bug(libpng)"; break; + case APP_ERROR: lp = "error(pngcp)"; break; + case USER_ERROR: lp = "error(user)"; break; + + case INTERNAL_ERROR: /* anything unexpected is an internal error: */ + case VERBOSE: case WARNINGS: case ERRORS: case QUIET: + default: lp = "bug(pngcp)"; break; + } + + fprintf(stderr, "%s: %s: %s", + dp->filename != NULL ? dp->filename : "", lp, dp->operation); + + fprintf(stderr, ": "); + + va_start(ap, fmt); + vfprintf(stderr, fmt, ap); + va_end(ap); + + fputc('\n', stderr); + } + /* else do not output any message */ + + /* Errors cause this routine to exit to the fail code */ + if (level > APP_FAIL || (level > ERRORS && !(dp->options & CONTINUE))) + { + if (dp->errset) + longjmp(dp->error_return, level); + + else + exit(99); + } +} + +#if PNG_LIBPNG_VER < 10700 && defined PNG_TEXT_SUPPORTED +static void +text_stash(struct display *dp) +{ + /* libpng 1.6 and earlier fixed a bug whereby text chunks were written + * multiple times by png_write_png; the issue was that png_write_png passed + * the same png_info to both png_write_info and png_write_end. Rather than + * fixing it by recording the information in the png_struct, or by recording + * where to write the chunks, the fix made was to change the 'compression' + * field of the chunk to invalid values, rendering the png_info somewhat + * useless. + * + * The only fix for this given that we use the png_info more than once is to + * make a copy of the text chunks and png_set_text it each time. This adds a + * text chunks, so they get replicated, but only the new set gets written + * each time. This uses memory like crazy but there is no way to delete the + * useless chunks from the png_info. + * + * To make this slightly more efficient only the top level structure is + * copied; since the old strings are actually preserved (in 1.6 and earlier) + * this happens to work. + */ + png_textp chunks = NULL; + + dp->num_text = png_get_text(dp->write_pp, dp->ip, &chunks, NULL); + + if (dp->num_text > 0) + { + dp->text_ptr = voidcast(png_textp, malloc(dp->num_text * sizeof *chunks)); + + if (dp->text_ptr == NULL) + display_log(dp, APP_ERROR, "text chunks: stash malloc failed"); + + else + memcpy(dp->text_ptr, chunks, dp->num_text * sizeof *chunks); + } + + dp->text_stashed = 1; /* regardless of whether there are chunks or not */ +} + +#define text_stash(dp) if (!dp->text_stashed) text_stash(dp) + +static void +text_restore(struct display *dp) +{ + /* libpng makes a copy, so this is fine: */ + if (dp->text_ptr != NULL) + png_set_text(dp->write_pp, dp->ip, dp->text_ptr, dp->num_text); +} + +#define text_restore(dp) if (dp->text_stashed) text_restore(dp) + +#else +#define text_stash(dp) ((void)0) +#define text_restore(dp) ((void)0) +#endif /* pre 1.7 */ + +/* OPTIONS: + * + * The command handles options of the forms: + * + * --option + * Turn an option on (Option) + * --no-option + * Turn an option off (Option) + * --option=value + * Set an option to a value (Value) + * --option=val1,val2,val3 + * Set an option to a bitmask constructed from the values (List) + */ +static png_byte +option_index(struct display *dp, const char *opt, size_t len) + /* Return the index (in options[]) of the given option, outputs an error if + * it does not exist. Takes the name of the option and a length (number of + * characters in the name). + */ +{ + png_byte j; + + for (j=0; jerrset ? INTERNAL_ERROR : USER_ERROR, + "%.*s: unknown option", (int)/*SAFE*/len, opt); + abort(); /* NOT REACHED */ +} + +/* This works for an option name (no quotes): */ +#define OPTIND(dp, name) option_index(dp, #name, (sizeof #name)-1) + +static int +get_option(struct display *dp, const char *opt, int *value) +{ + png_byte i = option_index(dp, opt, strlen(opt)); + + if (dp->entry[i]) /* option was set on command line */ + { + *value = dp->value[i]; + return 1; + } + + else + return 0; +} + +static int +set_opt_string_(struct display *dp, unsigned int sp, png_byte opt, + const char *entry_name) + /* Add the appropriate option string to dp->curr. */ +{ + int offset, add; + + if (sp > 0) + offset = dp->stack[sp-1].opt_string_end; + + else + offset = dp->opt_string_start; + + if (entry_name == range_lo) + add = sprintf(dp->curr+offset, " --%s=%d", options[opt].name, + dp->value[opt]); + + else + add = sprintf(dp->curr+offset, " --%s=%s", options[opt].name, entry_name); + + if (add < 0) + display_log(dp, INTERNAL_ERROR, "sprintf failed"); + + assert(offset+add < (int)/*SAFE*/sizeof dp->curr); + return offset+add; +} + +static void +set_opt_string(struct display *dp, unsigned int sp) + /* Add the appropriate option string to dp->curr. */ +{ + dp->stack[sp].opt_string_end = set_opt_string_(dp, sp, dp->stack[sp].opt, + options[dp->stack[sp].opt].values[dp->stack[sp].entry].name); +} + +static void +record_opt(struct display *dp, png_byte opt, const char *entry_name) + /* Record this option in dp->curr; called for an option not being searched, + * the caller passes in the name of the value, or range_lo to use the + * numerical value. + */ +{ + unsigned int sp = dp->csp; /* stack entry of next searched option */ + + if (sp >= dp->tsp) + { + /* At top of stack; add the opt string for this entry to the previous + * searched entry or the start of the dp->curr buffer if there is nothing + * on the stack yet (sp == 0). + */ + int offset = set_opt_string_(dp, sp, opt, entry_name); + + if (sp > 0) + dp->stack[sp-1].opt_string_end = offset; + + else + dp->opt_string_start = offset; + } + + /* else do nothing: option already recorded */ +} + +static int +opt_list_end(struct display *dp, png_byte opt, png_byte entry) +{ + if (options[opt].values[entry].name == range_lo) + return entry+1U >= options[opt].value_count /* missing range_hi */ || + options[opt].values[entry+1U].name != range_hi /* likewise */ || + options[opt].values[entry+1U].value <= dp->value[opt] /* range end */; + + else + return entry+1U >= options[opt].value_count /* missing 'all' */ || + options[opt].values[entry+1U].name == all /* last entry */; +} + +static void +push_opt(struct display *dp, unsigned int sp, png_byte opt, int search) + /* Push a new option onto the stack, initializing the new stack entry + * appropriately; this does all the work of next_opt (setting end/nsp) for + * the first entry in the list. + */ +{ + png_byte entry; + const char *entry_name; + + assert(sp == dp->tsp && sp < SL); + + /* The starting entry is entry 0 unless there is a range in which case it is + * the entry corresponding to range_lo: + */ + entry = options[opt].value_count; + assert(entry > 0U); + + do + { + entry_name = options[opt].values[--entry].name; + if (entry_name == range_lo) + break; + } + while (entry > 0U); + + dp->tsp = sp+1U; + dp->stack[sp].best_size = + dp->stack[sp].lo_size = + dp->stack[sp].hi_size = MAX_SIZE; + + if (search && entry_name == range_lo) /* search this range */ + { + dp->stack[sp].lo = options[opt].values[entry].value; + /* check for a mal-formed RANGE above: */ + assert(entry+1 < options[opt].value_count && + options[opt].values[entry+1].name == range_hi); + dp->stack[sp].hi = options[opt].values[entry+1].value; + } + + else + { + /* next_opt will just iterate over the range. */ + dp->stack[sp].lo = INT_MAX; + dp->stack[sp].hi = INT_MIN; /* Prevent range chop */ + } + + dp->stack[sp].opt = opt; + dp->stack[sp].entry = entry; + dp->stack[sp].best_val = dp->value[opt] = options[opt].values[entry].value; + + set_opt_string(dp, sp); + + /* This works for the search case too; if the range has only one entry 'end' + * will be marked here. + */ + if (opt_list_end(dp, opt, entry)) + { + dp->stack[sp].end = 1; + /* Skip the warning if pngcp did this itself. See the code in + * set_windowBits_hi. + */ + if (opt != dp->min_windowBits) + display_log(dp, APP_WARNING, "%s: only testing one value", + options[opt].name); + } + + else + { + dp->stack[sp].end = 0; + dp->nsp = dp->tsp; + } + + /* Do a lazy cache of the text chunks for libpng 1.6 and earlier; this is + * because they can only be written once(!) so if we are going to re-use the + * png_info we need a copy. + */ + text_stash(dp); +} + +static void +next_opt(struct display *dp, unsigned int sp) + /* Return the next value for this option. When called 'sp' is expected to be + * the topmost stack entry - only the topmost entry changes each time round - + * and there must be a valid entry to return. next_opt will set dp->nsp to + * sp+1 if more entries are available, otherwise it will not change it and + * set dp->stack[s].end to true. + */ +{ + int search = 0; + png_byte entry, opt; + const char *entry_name; + + /* dp->stack[sp] must be the top stack entry and it must be active: */ + assert(sp+1U == dp->tsp && !dp->stack[sp].end); + + opt = dp->stack[sp].opt; + entry = dp->stack[sp].entry; + assert(entry+1U < options[opt].value_count); + entry_name = options[opt].values[entry].name; + assert(entry_name != NULL); + + /* For ranges increment the value but don't change the entry, for all other + * cases move to the next entry and load its value: + */ + if (entry_name == range_lo) /* a range */ + { + /* A range can be iterated over or searched. The default iteration option + * is indicated by hi < lo on the stack, otherwise the range being search + * is [lo..hi] (inclusive). + */ + if (dp->stack[sp].lo > dp->stack[sp].hi) + dp->value[opt]++; + + else + { + /* This is the best size found for this option value: */ + png_alloc_size_t best_size = dp->stack[sp].best_size; + int lo = dp->stack[sp].lo; + int hi = dp->stack[sp].hi; + int val = dp->value[opt]; + + search = 1; /* end is determined here */ + assert(best_size < MAX_SIZE); + + if (val == lo) + { + /* Finding the best for the low end of the range: */ + dp->stack[sp].lo_size = best_size; + assert(hi > val); + + if (hi == val+1) /* only 2 entries */ + dp->stack[sp].end = 1; + + val = hi; + } + + else if (val == hi) + { + dp->stack[sp].hi_size = best_size; + assert(val > lo+1); /* else 'end' set above */ + + if (val == lo+2) /* only three entries to test */ + dp->stack[sp].end = 1; + + val = (lo + val)/2; + } + + else + { + png_alloc_size_t lo_size = dp->stack[sp].lo_size; + png_alloc_size_t hi_size = dp->stack[sp].hi_size; + + /* lo and hi should have been tested. */ + assert(lo_size < MAX_SIZE && hi_size < MAX_SIZE); + + /* These cases arise with the 'probe' handling below when there is a + * dip or peak in the size curve. + */ + if (val < lo) /* probing a new lo */ + { + /* Swap lo and val: */ + dp->stack[sp].lo = val; + dp->stack[sp].lo_size = best_size; + val = lo; + best_size = lo_size; + lo = dp->stack[sp].lo; + lo_size = dp->stack[sp].lo_size; + } + + else if (val > hi) /* probing a new hi */ + { + /* Swap hi and val: */ + dp->stack[sp].hi = val; + dp->stack[sp].hi_size = best_size; + val = hi; + best_size = hi_size; + hi = dp->stack[sp].hi; + hi_size = dp->stack[sp].hi_size; + } + + /* The following should be true or something got messed up above. */ + assert(lo < val && val < hi); + + /* If there are only four entries (lo, val, hi plus one more) just + * test the remaining entry. + */ + if (hi == lo+3) + { + /* Because of the 'probe' code val can either be lo+1 or hi-1; we + * need to test the other. + */ + val = lo + ((val == lo+1) ? 2 : 1); + assert(lo < val && val < hi); + dp->stack[sp].end = 1; + } + + else + { + /* There are at least 2 entries still untested between lo and hi, + * i.e. hi >= lo+4. 'val' is the midpoint +/- 0.5 + * + * Separate out the four easy cases when lo..val..hi are + * monotonically decreased or (more weird) increasing: + */ + assert(hi > lo+3); + + if (lo_size <= best_size && best_size <= hi_size) + { + /* Select the low range; testing this first favours the low + * range over the high range when everything comes out equal. + * Because of the probing 'val' may be lo+1. In that case end + * the search and set 'val' to lo+2. + */ + if (val == lo+1) + { + ++val; + dp->stack[sp].end = 1; + } + + else + { + dp->stack[sp].hi = hi = val; + dp->stack[sp].hi_size = best_size; + val = (lo + val) / 2; + } + } + + else if (lo_size >= best_size && best_size >= hi_size) + { + /* Monotonically decreasing size; this is the expected case. + * Select the high end of the range. As above, val may be + * hi-1. + */ + if (val == hi-1) + { + --val; + dp->stack[sp].end = 1; + } + + else + { + dp->stack[sp].lo = lo = val; + dp->stack[sp].lo_size = best_size; + val = (val + hi) / 2; + } + } + + /* If both those tests failed 'best_size' is either greater than + * or less than both lo_size and hi_size. There is a peak or dip + * in the curve of sizes from lo to hi and val is on the peak or + * dip. + * + * Because the ranges being searched as so small (level is 1..9, + * windowBits 8..15, memLevel 1..9) there will only be at most + * three untested values between lo..val and val..hi, so solve + * the problem by probing down from hi or up from lo, whichever + * is the higher. + * + * This is the place where 'val' is set to outside the range + * lo..hi, described as 'probing', though maybe 'narrowing' would + * be more accurate. + */ + else if (lo_size <= hi_size) /* down from hi */ + { + dp->stack[sp].hi = val; + dp->stack[sp].hi_size = best_size; + val = --hi; + } + + else /* up from low */ + { + dp->stack[sp].lo = val; + dp->stack[sp].lo_size = best_size; + val = ++lo; + } + + /* lo and hi are still the true range limits, check for the end + * condition. + */ + assert(hi > lo+1); + if (hi <= lo+2) + dp->stack[sp].end = 1; + } + } + + assert(val != dp->stack[sp].best_val); /* should be a new value */ + dp->value[opt] = val; + dp->stack[sp].best_size = MAX_SIZE; + } + } + + else + { + /* Increment 'entry' */ + dp->value[opt] = options[opt].values[++entry].value; + dp->stack[sp].entry = entry; + } + + set_opt_string(dp, sp); + + if (!search && opt_list_end(dp, opt, entry)) /* end of list */ + dp->stack[sp].end = 1; + + else if (!dp->stack[sp].end) /* still active after all these tests */ + dp->nsp = dp->tsp; +} + +static int +compare_option(const struct display *dp, unsigned int sp) +{ + int opt = dp->stack[sp].opt; + + /* If the best so far is numerically less than the current value the + * current set of options is invariably worse. + */ + if (dp->stack[sp].best_val < dp->value[opt]) + return -1; + + /* Lists of options are searched out of numerical order (currently only + * strategy), so only return +1 here when a range is being searched. + */ + else if (dp->stack[sp].best_val > dp->value[opt]) + { + if (dp->stack[sp].lo <= dp->stack[sp].hi /*searching*/) + return 1; + + else + return -1; + } + + else + return 0; /* match; current value is the best one */ +} + +static int +advance_opt(struct display *dp, png_byte opt, int search) +{ + unsigned int sp = dp->csp++; /* my stack entry */ + + assert(sp >= dp->nsp); /* nsp starts off zero */ + + /* If the entry was active in the previous run dp->stack[sp] is already + * set up and dp->tsp will be greater than sp, otherwise a new entry + * needs to be created. + * + * dp->nsp is handled this way: + * + * 1) When an option is pushed onto the stack dp->nsp and dp->tsp are + * both set (by push_opt) to the next stack entry *unless* there is + * only one entry in the new list, in which case dp->stack[sp].end + * is set. + * + * 2) For the top stack entry next_opt is called. The entry must be + * active (dp->stack[sp].end is not set) and either 'nsp' or 'end' + * will be updated as appropriate. + * + * 3) For lower stack entries nsp is set unless the stack entry is + * already at the end. This means that when all the higher entries + * are popped this entry will be too. + */ + if (sp >= dp->tsp) + { + push_opt(dp, sp, opt, search); /* This sets tsp to sp+1 */ + return 1; /* initialized */ + } + + else + { + int ret = 0; /* unchanged */ + + /* An option that is already on the stack; update best_size and best_val + * if appropriate. On the first run there are no previous values and + * dp->write_size will be MAX_SIZE, however on the first run dp->tsp + * starts off as 0. + */ + assert(dp->write_size > 0U && dp->write_size < MAX_SIZE); + + if (dp->stack[sp].best_size > dp->write_size || + (dp->stack[sp].best_size == dp->write_size && + compare_option(dp, sp) > 0)) + { + dp->stack[sp].best_size = dp->write_size; + dp->stack[sp].best_val = dp->value[opt]; + } + + if (sp+1U >= dp->tsp) + { + next_opt(dp, sp); + ret = 1; /* advanced */ + } + + else if (!dp->stack[sp].end) /* Active, not at top of stack */ + dp->nsp = sp+1U; + + return ret; /* advanced || unchanged */ + } +} + +static int +getallopts_(struct display *dp, png_byte opt, int *value, int record) + /* Like getop but iterate over all the values if the option was set to "all". + */ +{ + if (dp->entry[opt]) /* option was set on command line */ + { + /* Simple, single value, entries don't have a stack frame and have a fixed + * value (it doesn't change once set on the command line). Otherwise the + * value (entry) selected from the command line is 'all': + */ + const char *entry_name = options[opt].values[dp->entry[opt]-1].name; + + if (entry_name == all) + (void)advance_opt(dp, opt, 0/*do not search; iterate*/); + + else if (record) + record_opt(dp, opt, entry_name); + + *value = dp->value[opt]; + return 1; /* set */ + } + + else + return 0; /* not set */ +} + +static int +getallopts(struct display *dp, const char *opt_str, int *value) +{ + return getallopts_(dp, option_index(dp, opt_str, strlen(opt_str)), value, 0); +} + +static int +getsearchopts(struct display *dp, const char *opt_str, int *value) + /* As above except that if the option was not set try a search */ +{ + png_byte istrat; + png_byte opt = option_index(dp, opt_str, strlen(opt_str)); + int record = options[opt].search; + const char *entry_name; + + /* If it was set on the command line honour the setting, including 'all' + * which will override the built in search: + */ + if (getallopts_(dp, opt, value, record)) + return 1; + + else if (!record) /* not a search option */ + return 0; /* unset and not searched */ + + /* Otherwise decide what to do here. */ + istrat = OPTIND(dp, strategy); + entry_name = range_lo; /* record the value, not the name */ + + if (opt == istrat) /* search all strategies */ + (void)advance_opt(dp, opt, 0/*iterate*/), record=0; + + else if (opt == OPTIND(dp, level)) + { + /* Both RLE and HUFFMAN don't benefit from level increases */ + if (dp->value[istrat] == Z_RLE || dp->value[istrat] == Z_HUFFMAN_ONLY) + dp->value[opt] = 1; + + else /* fixed, filtered or default */ + (void)advance_opt(dp, opt, 1/*search*/), record=0; + } + + else if (opt == OPTIND(dp, windowBits)) + { + /* Changing windowBits for strategies that do not search the window is + * pointless. Huffman-only does not search, RLE only searches backwards + * one byte, so given that the maximum string length is 258, a windowBits + * of 9 is always sufficient. + */ + if (dp->value[istrat] == Z_HUFFMAN_ONLY) + dp->value[opt] = 8; + + else if (dp->value[istrat] == Z_RLE) + dp->value[opt] = 9; + + else /* fixed, filtered or default */ + (void)advance_opt(dp, opt, 1/*search*/), record=0; + } + + else if (opt == OPTIND(dp, memLevel)) + { +# if 0 + (void)advance_opt(dp, opt, 0/*all*/), record=0; +# else + dp->value[opt] = MAX_MEM_LEVEL; +# endif + } + + else /* something else */ + assert(0=="reached"); + + if (record) + record_opt(dp, opt, entry_name); + + /* One of the above searched options: */ + *value = dp->value[opt]; + return 1; +} + +static int +find_val(struct display *dp, png_byte opt, const char *str, size_t len) + /* Like option_index but sets (index+i) of the entry in options[opt] that + * matches str[0..len-1] into dp->entry[opt] as well as returning the actual + * value. + */ +{ + int rlo = INT_MAX, rhi = INT_MIN; + png_byte j, irange = 0; + + for (j=1U; j<=options[opt].value_count; ++j) + { + if (strncmp(options[opt].values[j-1U].name, str, len) == 0 && + options[opt].values[j-1U].name[len] == 0) + { + dp->entry[opt] = j; + return options[opt].values[j-1U].value; + } + else if (options[opt].values[j-1U].name == range_lo) + rlo = options[opt].values[j-1U].value, irange = j; + else if (options[opt].values[j-1U].name == range_hi) + rhi = options[opt].values[j-1U].value; + } + + /* No match on the name, but there may be a range. */ + if (irange > 0) + { + char *ep = NULL; + long l = strtol(str, &ep, 0); + + if (ep == str+len && l >= rlo && l <= rhi) + { + dp->entry[opt] = irange; /* range_lo */ + return (int)/*SAFE*/l; + } + } + + display_log(dp, dp->errset ? INTERNAL_ERROR : USER_ERROR, + "%s: unknown value setting '%.*s'", options[opt].name, + (int)/*SAFE*/len, str); + abort(); /* NOT REACHED */ +} + +static int +opt_check(struct display *dp, const char *arg) +{ + assert(dp->errset == 0); + + if (arg != NULL && arg[0] == '-' && arg[1] == '-') + { + int i = 0, negate = (strncmp(arg+2, "no-", 3) == 0), val; + png_byte j; + + if (negate) + arg += 5; /* --no- */ + + else + arg += 2; /* -- */ + + /* Find the length (expect arg\0 or arg=) */ + while (arg[i] != 0 && arg[i] != '=') ++i; + + /* So arg[0..i-1] is the argument name, this does not return if this isn't + * a valid option name. + */ + j = option_index(dp, arg, i); + + /* It matcheth an option; check the remainder. */ + if (arg[i] == 0) /* no specified value, use the default */ + { + val = options[j].values[negate].value; + dp->entry[j] = (png_byte)/*SAFE*/(negate + 1U); + } + + else + { + const char *list = arg + (i+1); + + /* Expect a single value here unless this is a list, in which case + * multiple values are combined. + */ + if (options[j].opt != LIST) + { + /* find_val sets 'dp->entry[j]' to a non-zero value: */ + val = find_val(dp, j, list, strlen(list)); + + if (negate) + { + if (options[j].opt < OPTION) + val = !val; + + else + { + display_log(dp, USER_ERROR, + "%.*s: option=arg cannot be negated", i, arg); + abort(); /* NOT REACHED */ + } + } + } + + else /* multiple options separated by ',' characters */ + { + /* --no-option negates list values from the default, which should + * therefore be 'all'. Notice that if the option list is empty in + * this case nothing will be removed and therefore --no-option= is + * the same as --option. + */ + if (negate) + val = options[j].values[0].value; + + else + val = 0; + + while (*list != 0) /* allows option= which sets 0 */ + { + /* A value is terminated by the end of the list or a ',' + * character. + */ + int v, iv; + + iv = 0; /* an index into 'list' */ + while (list[++iv] != 0 && list[iv] != ',') {} + + v = find_val(dp, j, list, iv); + + if (negate) + val &= ~v; + + else + val |= v; + + list += iv; + if (*list != 0) + ++list; /* skip the ',' */ + } + } + } + + /* 'val' is the new value, store it for use later and debugging: */ + dp->value[j] = val; + + if (options[j].opt < LEVEL_MASK) + { + /* The handling for error levels is to set the level. */ + if (val) /* Set this level */ + dp->options = (dp->options & ~LEVEL_MASK) | options[j].opt; + + else + display_log(dp, USER_ERROR, + "%.*s: messages cannot be turned off individually; set a message level", + i, arg); + } + + else if (options[j].opt < OPTION) + { + if (val) + dp->options |= options[j].opt; + + else + dp->options &= ~options[j].opt; + } + + return 1; /* this is an option */ + } + + else + return 0; /* not an option */ +} + +#ifdef PNG_PNGCP_TIMING_SUPPORTED +static void +set_timer(struct display *dp, struct timespec *timer) +{ + /* Do the timing using clock_gettime and the per-process timer. */ + if (clock_gettime(CLOCK_PROCESS_CPUTIME_ID, timer)) + { + display_log(dp, APP_ERROR, + "CLOCK_PROCESS_CPUTIME_ID: %s: timing disabled\n", strerror(errno)); + dp->value[OPTIND(dp,time)] = 0; /* i.e. off */ + } +} + +static void +start_timer(struct display *dp, int what) +{ + if ((dp->value[OPTIND(dp,time)] & what) != 0) + set_timer(dp, what == PNGCP_TIME_READ ? &dp->read_time : &dp->write_time); +} + +static void +end_timer(struct display *dp, int what) +{ + if ((dp->value[OPTIND(dp,time)] & what) != 0) + { + struct timespec t, tmp; + + set_timer(dp, &t); + + if (what == PNGCP_TIME_READ) + tmp = dp->read_time; + + else + tmp = dp->write_time; + + t.tv_sec -= tmp.tv_sec; + t.tv_nsec -= tmp.tv_nsec; + + if (t.tv_nsec < 0) + { + --(t.tv_sec); + t.tv_nsec += 1000000000L; + } + + if (what == PNGCP_TIME_READ) + dp->read_time = t, tmp = dp->read_time_total; + + else + dp->write_time = t, tmp = dp->write_time_total; + + tmp.tv_sec += t.tv_sec; + tmp.tv_nsec += t.tv_nsec; + + if (tmp.tv_nsec >= 1000000000L) + { + ++(tmp.tv_sec); + tmp.tv_nsec -= 1000000000L; + } + + if (what == PNGCP_TIME_READ) + dp->read_time_total = tmp; + + else + dp->write_time_total = tmp; + } +} + +static void +print_time(const char *what, struct timespec t) +{ + printf("%s %.2lu.%.9ld", what, (unsigned long)t.tv_sec, t.tv_nsec); +} +#else /* !PNGCP_TIMING */ +#define start_timer(dp, what) ((void)0) +#define end_timer(dp, what) ((void)0) +#endif /* !PNGCP_TIMING */ + +/* The following is used in main to verify that the final argument is a + * directory: + */ +static int +checkdir(const char *pathname) +{ + struct stat buf; + return stat(pathname, &buf) == 0 && S_ISDIR(buf.st_mode); +} + +/* Work out whether a path is valid (if not a display_log occurs), a directory + * (1 is returned) or a file *or* non-existent (0 is returned). + * + * Used for a write path. + */ +static int +isdir(struct display *dp, const char *pathname) +{ + if (pathname == NULL) + return 0; /* stdout */ + + else if (pathname[0] == 0) + return 1; /* empty string */ + + else + { + struct stat buf; + int ret = stat(pathname, &buf); + + if (ret == 0) /* the entry exists */ + { + if (S_ISDIR(buf.st_mode)) + return 1; + + /* Else expect an object that exists and can be written: */ + if (access(pathname, W_OK) != 0) + display_log(dp, USER_ERROR, "%s: cannot be written (%s)", pathname, + strerror(errno)); + + return 0; /* file (exists, can be written) */ + } + + else /* an error */ + { + /* Non-existence is fine, other errors are not: */ + if (errno != ENOENT) + display_log(dp, USER_ERROR, "%s: invalid output name (%s)", + pathname, strerror(errno)); + + return 0; /* file (does not exist) */ + } + } +} + +static void +makename(struct display *dp, const char *dir, const char *infile) +{ + /* Make a name for an output file (and check it). */ + dp->namebuf[0] = 0; + + if (dir == NULL || infile == NULL) + display_log(dp, INTERNAL_ERROR, "NULL name to makename"); + + else + { + size_t dsize = strlen(dir); + + if (dsize <= (sizeof dp->namebuf)-2) /* Allow for name + '/' + '\0' */ + { + size_t isize = strlen(infile); + size_t istart = isize-1; + + /* This should fail before here: */ + if (infile[istart] == '/') + display_log(dp, INTERNAL_ERROR, "infile with trailing /"); + + memcpy(dp->namebuf, dir, dsize); + if (dsize > 0 && dp->namebuf[dsize-1] != '/') + dp->namebuf[dsize++] = '/'; + + /* Find the rightmost non-/ character: */ + while (istart > 0 && infile[istart-1] != '/') + --istart; + + isize -= istart; + infile += istart; + + if (dsize+isize < (sizeof dp->namebuf)) /* dsize + infile + '\0' */ + { + memcpy(dp->namebuf+dsize, infile, isize+1); + + if (isdir(dp, dp->namebuf)) + display_log(dp, USER_ERROR, "%s: output file is a directory", + dp->namebuf); + } + + else + { + dp->namebuf[dsize] = 0; /* allowed for: -2 at start */ + display_log(dp, USER_ERROR, "%s%s: output file name too long", + dp->namebuf, infile); + } + } + + else + display_log(dp, USER_ERROR, "%s: output directory name too long", dir); + } +} + +/* error handler callbacks for libpng */ +static void PNGCBAPI +display_warning(png_structp pp, png_const_charp warning) +{ + struct display *dp = get_dp(pp); + + /* This is used to prevent repeated warnings while searching */ + if (!dp->no_warnings) + display_log(get_dp(pp), LIBPNG_WARNING, "%s", warning); +} + +static void PNGCBAPI +display_error(png_structp pp, png_const_charp error) +{ + struct display *dp = get_dp(pp); + + display_log(dp, LIBPNG_ERROR, "%s", error); +} + +static void +display_start_read(struct display *dp, const char *filename) +{ + if (filename != NULL) + { + dp->filename = filename; + dp->fp = fopen(filename, "rb"); + } + + else + { + dp->filename = ""; + dp->fp = stdin; + } + + dp->w = dp->h = 0U; + dp->bpp = 0U; + dp->size = 0U; + dp->read_size = 0U; + + if (dp->fp == NULL) + display_log(dp, USER_ERROR, "file open failed (%s)", strerror(errno)); +} + +static void PNGCBAPI +read_function(png_structp pp, png_bytep data, size_t size) +{ + struct display *dp = get_dp(pp); + + if (size == 0U || fread(data, size, 1U, dp->fp) == 1U) + dp->read_size += size; + + else + { + if (feof(dp->fp)) + display_log(dp, LIBPNG_ERROR, "PNG file truncated"); + else + display_log(dp, LIBPNG_ERROR, "PNG file read failed (%s)", + strerror(errno)); + } +} + +static void +read_png(struct display *dp, const char *filename) +{ + display_clean_read(dp); /* safety */ + display_start_read(dp, filename); + + dp->read_pp = png_create_read_struct(PNG_LIBPNG_VER_STRING, dp, + display_error, display_warning); + if (dp->read_pp == NULL) + display_log(dp, LIBPNG_ERROR, "failed to create read struct"); + +# ifdef PNG_BENIGN_ERRORS_SUPPORTED + png_set_benign_errors(dp->read_pp, 1/*allowed*/); +# endif /* BENIGN_ERRORS */ + +# ifdef FIX_INDEX + if ((dp->options & FIX_INDEX) != 0) + png_set_check_for_invalid_index(dp->read_pp, 1/*on, no warning*/); +# ifdef IGNORE_INDEX + else +# endif /* IGNORE_INDEX */ +# endif /* FIX_INDEX */ +# ifdef IGNORE_INDEX + if ((dp->options & IGNORE_INDEX) != 0) /* DANGEROUS */ + png_set_check_for_invalid_index(dp->read_pp, -1/*off completely*/); +# endif /* IGNORE_INDEX */ + + /* The png_read_png API requires us to make the info struct, but it does the + * call to png_read_info. + */ + dp->ip = png_create_info_struct(dp->read_pp); + if (dp->ip == NULL) + png_error(dp->read_pp, "failed to create info struct"); + + /* Set the IO handling */ + png_set_read_fn(dp->read_pp, dp, read_function); + +# ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED + png_set_keep_unknown_chunks(dp->read_pp, PNG_HANDLE_CHUNK_ALWAYS, NULL, + 0); +# endif /* HANDLE_AS_UNKNOWN */ + +# ifdef PNG_SET_USER_LIMITS_SUPPORTED + /* Remove the user limits, if any */ + png_set_user_limits(dp->read_pp, 0x7fffffff, 0x7fffffff); +# endif /* SET_USER_LIMITS */ + + /* Now read the PNG. */ + start_timer(dp, PNGCP_TIME_READ); + png_read_png(dp->read_pp, dp->ip, 0U/*transforms*/, NULL/*params*/); + end_timer(dp, PNGCP_TIME_READ); + dp->w = png_get_image_width(dp->read_pp, dp->ip); + dp->h = png_get_image_height(dp->read_pp, dp->ip); + dp->ct = png_get_color_type(dp->read_pp, dp->ip); + dp->bpp = png_get_bit_depth(dp->read_pp, dp->ip) * + png_get_channels(dp->read_pp, dp->ip); + { + /* png_get_rowbytes should never return 0 because the value is set by the + * first call to png_set_IHDR, which should have happened by now, but just + * in case: + */ + png_alloc_size_t rb = png_get_rowbytes(dp->read_pp, dp->ip); + + if (rb == 0) + png_error(dp->read_pp, "invalid row byte count from libpng"); + + /* The size calc can overflow. */ + if ((MAX_SIZE-dp->h)/rb < dp->h) + png_error(dp->read_pp, "image too large"); + + dp->size = rb * dp->h + dp->h/*filter byte*/; + } + +#ifdef FIX_INDEX + if (dp->ct == PNG_COLOR_TYPE_PALETTE && (dp->options & FIX_INDEX) != 0) + { + int max = png_get_palette_max(dp->read_pp, dp->ip); + png_colorp palette = NULL; + int num = -1; + + if (png_get_PLTE(dp->read_pp, dp->ip, &palette, &num) != PNG_INFO_PLTE + || max < 0 || num <= 0 || palette == NULL) + display_log(dp, LIBPNG_ERROR, "invalid png_get_PLTE result"); + + if (max >= num) + { + /* 'Fix' the palette. */ + int i; + png_color newpal[256]; + + for (i=0; iread_pp, dp->ip, newpal, i); + } + } +#endif /* FIX_INDEX */ + + display_clean_read(dp); + dp->operation = "none"; +} + +static void +display_start_write(struct display *dp, const char *filename) +{ + assert(dp->fp == NULL); + + if ((dp->options & NOWRITE) != 0) + dp->output_file = ""; + + else + { + if (filename != NULL) + { + dp->output_file = filename; + dp->fp = fopen(filename, "wb"); + } + + else + { + dp->output_file = ""; + dp->fp = stdout; + } + + if (dp->fp == NULL) + display_log(dp, USER_ERROR, "%s: file open failed (%s)", + dp->output_file, strerror(errno)); + } +} + +static void PNGCBAPI +write_function(png_structp pp, png_bytep data, size_t size) +{ + struct display *dp = get_dp(pp); + + /* The write fail is classed as a USER_ERROR, so --quiet does not turn it + * off, this seems more likely to be correct. + */ + if (dp->fp == NULL || fwrite(data, size, 1U, dp->fp) == 1U) + { + dp->write_size += size; + if (dp->write_size < size || dp->write_size == MAX_SIZE) + png_error(pp, "IDAT size overflow"); + } + + else + display_log(dp, USER_ERROR, "%s: PNG file write failed (%s)", + dp->output_file, strerror(errno)); +} + +/* Compression option, 'method' is never set: there is no choice. + * + * IMPORTANT: the order of the entries in this macro determines the preference + * order when two different combos of two of these options produce an IDAT of + * the same size. The logic here is to put the things that affect the decoding + * of the PNG image ahead of those that are relevant only to the encoding. + */ +#define SET_COMPRESSION\ + SET(strategy, strategy);\ + SET(windowBits, window_bits);\ + SET(level, level);\ + SET(memLevel, mem_level); + +#ifdef PNG_WRITE_CUSTOMIZE_COMPRESSION_SUPPORTED +static void +search_compression(struct display *dp) +{ + /* Like set_compression below but use a more restricted search than 'all' */ + int val; + +# define SET(name, func) if (getsearchopts(dp, #name, &val))\ + png_set_compression_ ## func(dp->write_pp, val); + SET_COMPRESSION +# undef SET +} + +static void +set_compression(struct display *dp) +{ + int val; + +# define SET(name, func) if (getallopts(dp, #name, &val))\ + png_set_compression_ ## func(dp->write_pp, val); + SET_COMPRESSION +# undef SET +} + +#ifdef PNG_SW_COMPRESS_level /* 1.7.0+ */ +static void +set_ICC_profile_compression(struct display *dp) +{ + int val; + +# define SET(name, func) if (getallopts(dp, "ICC-profile-" #name, &val))\ + png_set_ICC_profile_compression_ ## func(dp->write_pp, val); + SET_COMPRESSION +# undef SET +} +#else +# define set_ICC_profile_compression(dp) ((void)0) +#endif +#else +# define search_compression(dp) ((void)0) +# define set_compression(dp) ((void)0) +# define set_ICC_profile_compression(dp) ((void)0) +#endif /* WRITE_CUSTOMIZE_COMPRESSION */ + +#ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED +static void +set_text_compression(struct display *dp) +{ + int val; + +# define SET(name, func) if (getallopts(dp, "text-" #name, &val))\ + png_set_text_compression_ ## func(dp->write_pp, val); + SET_COMPRESSION +# undef SET +} +#else +# define set_text_compression(dp) ((void)0) +#endif /* WRITE_CUSTOMIZE_ZTXT_COMPRESSION */ + +static void +write_png(struct display *dp, const char *destname) +{ + display_clean_write(dp); /* safety */ + display_start_write(dp, destname); + + dp->write_pp = png_create_write_struct(PNG_LIBPNG_VER_STRING, dp, + display_error, display_warning); + + if (dp->write_pp == NULL) + display_log(dp, LIBPNG_ERROR, "failed to create write png_struct"); + +# ifdef PNG_BENIGN_ERRORS_SUPPORTED + png_set_benign_errors(dp->write_pp, 1/*allowed*/); +# endif /* BENIGN_ERRORS */ + + png_set_write_fn(dp->write_pp, dp, write_function, NULL/*flush*/); + +#ifdef IGNORE_INDEX + if ((dp->options & IGNORE_INDEX) != 0) /* DANGEROUS */ + png_set_check_for_invalid_index(dp->write_pp, -1/*off completely*/); +#endif /* IGNORE_INDEX */ + + /* Restore the text chunks when using libpng 1.6 or less; this is a macro + * which expands to nothing in 1.7+ In earlier versions it tests + * dp->text_stashed, which is only set (below) *after* the first write. + */ + text_restore(dp); + +# ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED + png_set_keep_unknown_chunks(dp->write_pp, PNG_HANDLE_CHUNK_ALWAYS, NULL, + 0); +# endif /* HANDLE_AS_UNKNOWN */ + +# ifdef PNG_SET_USER_LIMITS_SUPPORTED + /* Remove the user limits, if any */ + png_set_user_limits(dp->write_pp, 0x7fffffff, 0x7fffffff); +# endif + + /* OPTION HANDLING */ + /* compression outputs, IDAT and zTXt/iTXt: */ + dp->tsp = dp->nsp; + dp->nsp = dp->csp = 0; +# ifdef PNG_SW_COMPRESS_png_level + { + int val; + + /* This sets everything, but then the following options just override + * the specific settings for ICC profiles and text. + */ + if (getallopts(dp, "compression", &val)) + png_set_compression(dp->write_pp, val); + + if (getallopts(dp, "ICC-profile-compression", &val)) + png_set_ICC_profile_compression(dp->write_pp, val); + + if (getallopts(dp, "text-compression", &val)) + png_set_text_compression(dp->write_pp, val); + } +# endif /* png_level support */ + if (dp->options & SEARCH) + search_compression(dp); + else + set_compression(dp); + set_ICC_profile_compression(dp); + set_text_compression(dp); + + { + int val; + + /* The permitted range is 1..0x7FFFFFFF, so the cast is safe */ + if (get_option(dp, "IDAT-size", &val)) + png_set_IDAT_size(dp->write_pp, val); + } + + /* filter handling */ +# ifdef PNG_WRITE_FILTER_SUPPORTED + { + int val; + + if (get_option(dp, "filter", &val)) + png_set_filter(dp->write_pp, PNG_FILTER_TYPE_BASE, val); + } +# endif /* WRITE_FILTER */ + + /* This just uses the 'read' info_struct directly, it contains the image. */ + dp->write_size = 0U; + start_timer(dp, PNGCP_TIME_WRITE); + png_write_png(dp->write_pp, dp->ip, 0U/*transforms*/, NULL/*params*/); + end_timer(dp, PNGCP_TIME_WRITE); + + /* Make sure the file was written ok: */ + if (dp->fp != NULL) + { + FILE *fp = dp->fp; + dp->fp = NULL; + if (fclose(fp)) + display_log(dp, APP_ERROR, "%s: write failed (%s)", + destname == NULL ? "stdout" : destname, strerror(errno)); + } + + /* Clean it on the way out - if control returns to the caller then the + * written_file contains the required data. + */ + display_clean_write(dp); + dp->operation = "none"; +} + +static void +set_windowBits_hi(struct display *dp) +{ + /* windowBits is in the range 8..15 but zlib maps '8' to '9' so it is only + * worth using if the data size is 256 byte or less. + */ + int wb = MAX_WBITS; /* for large images */ + int i = VLSIZE(windowBits_IDAT); + + while (wb > 8 && dp->size <= 1U<<(wb-1)) --wb; + + while (--i >= 0) if (VLNAME(windowBits_IDAT)[i].name == range_hi) break; + + assert(i > 1); /* vl_windowBits_IDAT always has a RANGE() */ + VLNAME(windowBits_IDAT)[i].value = wb; + + assert(VLNAME(windowBits_IDAT)[--i].name == range_lo); + VLNAME(windowBits_IDAT)[i].value = wb > 8 ? 9 : 8; + + /* If wb == 8 then any search has been restricted to just one windowBits + * entry. Record that here to avoid producing a spurious app-level warning + * above. + */ + if (wb == 8) + dp->min_windowBits = OPTIND(dp, windowBits); +} + +static int +better_options(const struct display *dp) +{ + /* Are these options better than the best found so far? Normally the + * options are tested in preference order, best first, however when doing a + * search operation on a range the range values are tested out of order. In + * that case preferable options will get tested later. + * + * This function looks through the stack from the bottom up looking for an + * option that does not match the current best value. When it finds one it + * checks to see if it is more or less desirable and returns true or false + * as appropriate. + * + * Notice that this means that the order options are pushed onto the stack + * conveys a priority; lower/earlier options are more important than later + * ones. + */ + unsigned int sp; + + for (sp=0; spcsp; ++sp) + { + int c = compare_option(dp, sp); + + if (c < 0) + return 0; /* worse */ + + else if (c > 0) + return 1; /* better */ + } + + assert(0 && "unreached"); +} + +static void +print_search_results(struct display *dp) +{ + assert(dp->filename != NULL); + printf("%s [%ld x %ld %d bpp %s, %lu bytes] %lu -> %lu with '%s'\n", + dp->filename, (unsigned long)dp->w, (unsigned long)dp->h, dp->bpp, + cts(dp->ct), (unsigned long)dp->size, (unsigned long)dp->read_size, + (unsigned long)dp->best_size, dp->best); + fflush(stdout); +} + +static void +log_search(struct display *dp, unsigned int log_depth) +{ + /* Log, and reset, the search so far: */ + if (dp->nsp/*next entry to change*/ <= log_depth) + { + print_search_results(dp); + /* Start again with this entry: */ + dp->best_size = MAX_SIZE; + } +} + +static void +cp_one_file(struct display *dp, const char *filename, const char *destname) +{ + unsigned int log_depth; + + dp->filename = filename; + dp->operation = "read"; + dp->no_warnings = 0; + + /* Read it then write it: */ + if (filename != NULL && access(filename, R_OK) != 0) + display_log(dp, USER_ERROR, "%s: invalid file name (%s)", + filename, strerror(errno)); + + read_png(dp, filename); + + /* But 'destname' may be a directory. */ + dp->operation = "write"; + + /* Limit the upper end of the windowBits range for this file */ + set_windowBits_hi(dp); + + /* For logging, depth to log: */ + { + int val; + + if (get_option(dp, "log-depth", &val) && val >= 0) + log_depth = (unsigned int)/*SAFE*/val; + + else + log_depth = 0U; + } + + if (destname != NULL) /* else stdout */ + { + if (isdir(dp, destname)) + { + makename(dp, destname, filename); + destname = dp->namebuf; + } + + else if (access(destname, W_OK) != 0 && errno != ENOENT) + display_log(dp, USER_ERROR, "%s: invalid output name (%s)", destname, + strerror(errno)); + } + + dp->nsp = 0; + dp->curr[0] = 0; /* acts as a flag for the caller */ + dp->opt_string_start = 0; + dp->best[0] = 0; /* safety */ + dp->best_size = MAX_SIZE; + write_png(dp, destname); + + /* Initialize the 'best' fields: */ + strcpy(dp->best, dp->curr); + dp->best_size = dp->write_size; + + if (dp->nsp > 0) /* iterating over lists */ + { + char *tmpname, tmpbuf[(sizeof dp->namebuf) + 4]; + assert(dp->curr[0] == ' ' && dp->tsp > 0); + + /* Cancel warnings on subsequent writes */ + log_search(dp, log_depth); + dp->no_warnings = 1; + + /* Make a temporary name for the subsequent tests: */ + if (destname != NULL) + { + strcpy(tmpbuf, destname); + strcat(tmpbuf, ".tmp"); /* space for .tmp allocated above */ + tmpname = tmpbuf; + } + + else + tmpname = NULL; /* stdout */ + + /* Loop to find the best option. */ + do + { + write_png(dp, tmpname); + + /* And compare the sizes (the write function makes sure write_size + * doesn't overflow.) + */ + assert(dp->csp > 0); + + if (dp->write_size < dp->best_size || + (dp->write_size == dp->best_size && better_options(dp))) + { + if (destname != NULL && rename(tmpname, destname) != 0) + display_log(dp, APP_ERROR, "rename %s %s failed (%s)", tmpname, + destname, strerror(errno)); + + strcpy(dp->best, dp->curr); + dp->best_size = dp->write_size; + } + + else if (tmpname != NULL && unlink(tmpname) != 0) + display_log(dp, APP_WARNING, "unlink %s failed (%s)", tmpname, + strerror(errno)); + + log_search(dp, log_depth); + } + while (dp->nsp > 0); + + /* Do this for the 'sizes' option so that it reports the correct size. */ + dp->write_size = dp->best_size; + } +} + +static int +cppng(struct display *dp, const char *file, const char *gv dest) + /* Exists solely to isolate the setjmp clobbers which some versions of GCC + * erroneously generate. + */ +{ + int ret = setjmp(dp->error_return); + + if (ret == 0) + { + dp->errset = 1; + cp_one_file(dp, file, dest); + dp->errset = 0; + return 0; + } + + else + { + dp->errset = 0; + + if (ret < ERRORS) /* shouldn't longjmp on warnings */ + display_log(dp, INTERNAL_ERROR, "unexpected return code %d", ret); + + return ret; + } +} + +int +main(int argc, char **argv) +{ + /* For each file on the command line test it with a range of transforms */ + int option_end; + struct display d; + + display_init(&d); + + d.operation = "options"; + for (option_end = 1; + option_end < argc && opt_check(&d, argv[option_end]); + ++option_end) + { + } + + /* Do a quick check on the directory target case; when there are more than + * two arguments the last one must be a directory. + */ + if (!(d.options & NOWRITE) && option_end+2 < argc && !checkdir(argv[argc-1])) + { + fprintf(stderr, + "pngcp: %s: directory required with more than two arguments\n", + argv[argc-1]); + return 99; + } + + { + int errors = 0; + int i = option_end; + + /* Do this at least once; if there are no arguments stdin/stdout are used. + */ + d.operation = "files"; + do + { + const char *infile = NULL; + const char *outfile = NULL; + int ret; + + if (i < argc) + { + infile = argv[i++]; + if (!(d.options & NOWRITE) && i < argc) + outfile = argv[argc-1]; + } + + ret = cppng(&d, infile, outfile); + + if (ret) + { + if (ret > QUIET) /* abort on user or internal error */ + return 99; + + /* An error: the output is meaningless */ + } + + else if (d.best[0] != 0) + { + /* This result may already have been output, in which case best_size + * has been reset. + */ + if (d.best_size < MAX_SIZE) + print_search_results(&d); + } + + else if (d.options & SIZES) + { + printf("%s [%ld x %ld %d bpp %s, %lu bytes] %lu -> %lu [0x%lx]\n", + infile, (unsigned long)d.w, (unsigned long)d.h, d.bpp, + cts(d.ct), (unsigned long)d.size, (unsigned long)d.read_size, + (unsigned long)d.write_size, (unsigned long)d.results); + fflush(stdout); + } + + /* Here on any return, including failures, except user/internal issues + */ + { + int pass = (d.options & STRICT) ? + RESULT_STRICT(d.results) : RESULT_RELAXED(d.results); + + if (!pass) + ++errors; + + if (d.options & LOG) + { + int j; + + printf("%s: pngcp", pass ? "PASS" : "FAIL"); + + for (j=1; j +#include +#include +#include +#include +#include +#include + +#define implies(x,y) assert(!(x) || (y)) + +#ifdef __GNUC__ + /* This is used to fix the error: + * + * pngfix.c: + * In function 'zlib_advance': + * pngfix.c:181:13: error: assuming signed overflow does not + * occur when simplifying conditional to constant [-Werror=strict-overflow] + */ +# define FIX_GCC volatile +#else +# define FIX_GCC +#endif + +#define PROGRAM_NAME "pngfix" + +/* Define the following to use this program against your installed libpng, + * rather than the one being built here: + */ +#ifdef PNG_FREESTANDING_TESTS +# include +#else +# include "../../png.h" +#endif + +#if PNG_LIBPNG_VER < 10603 /* 1.6.3 */ +# error "pngfix will not work with libpng prior to 1.6.3" +#endif + +#ifdef PNG_SETJMP_SUPPORTED +#include + +#if defined(PNG_READ_SUPPORTED) && defined(PNG_EASY_ACCESS_SUPPORTED) &&\ + (defined(PNG_READ_DEINTERLACE_SUPPORTED) ||\ + defined(PNG_READ_INTERLACING_SUPPORTED)) + +/* zlib.h defines the structure z_stream, an instance of which is included + * in this structure and is required for decompressing the LZ compressed + * data in PNG files. + */ +#ifndef ZLIB_CONST + /* We must ensure that zlib uses 'const' in declarations. */ +# define ZLIB_CONST +#endif +#include +#ifdef const + /* zlib.h sometimes #defines const to nothing, undo this. */ +# undef const +#endif + +/* zlib.h has mediocre z_const use before 1.2.6, this stuff is for compatibility + * with older builds. + */ +#if ZLIB_VERNUM < 0x1260 +# define PNGZ_MSG_CAST(s) constcast(char*,s) +# define PNGZ_INPUT_CAST(b) constcast(png_bytep,b) +#else +# define PNGZ_MSG_CAST(s) (s) +# define PNGZ_INPUT_CAST(b) (b) +#endif + +#ifndef PNG_MAXIMUM_INFLATE_WINDOW +# error "pngfix not supported in this libpng version" +#endif + +#if ZLIB_VERNUM >= 0x1240 + +/* Copied from pngpriv.h */ +#ifdef __cplusplus +# define voidcast(type, value) static_cast(value) +# define constcast(type, value) const_cast(value) +# define aligncast(type, value) \ + static_cast(static_cast(value)) +# define aligncastconst(type, value) \ + static_cast(static_cast(value)) +#else +# define voidcast(type, value) (value) +# define constcast(type, value) ((type)(value)) +# define aligncast(type, value) ((void*)(value)) +# define aligncastconst(type, value) ((const void*)(value)) +#endif /* __cplusplus */ + +#if PNG_LIBPNG_VER < 10700 +/* Chunk tags (copied from pngpriv.h) */ +#define PNG_32b(b,s) ((png_uint_32)(b) << (s)) +#define PNG_U32(b1,b2,b3,b4) \ + (PNG_32b(b1,24) | PNG_32b(b2,16) | PNG_32b(b3,8) | PNG_32b(b4,0)) + +/* Constants for known chunk types. */ +#define png_IDAT PNG_U32( 73, 68, 65, 84) +#define png_IEND PNG_U32( 73, 69, 78, 68) +#define png_IHDR PNG_U32( 73, 72, 68, 82) +#define png_PLTE PNG_U32( 80, 76, 84, 69) +#define png_bKGD PNG_U32( 98, 75, 71, 68) +#define png_cHRM PNG_U32( 99, 72, 82, 77) +#define png_fRAc PNG_U32(102, 82, 65, 99) /* registered, not defined */ +#define png_gAMA PNG_U32(103, 65, 77, 65) +#define png_gIFg PNG_U32(103, 73, 70, 103) +#define png_gIFt PNG_U32(103, 73, 70, 116) /* deprecated */ +#define png_gIFx PNG_U32(103, 73, 70, 120) +#define png_hIST PNG_U32(104, 73, 83, 84) +#define png_iCCP PNG_U32(105, 67, 67, 80) +#define png_iTXt PNG_U32(105, 84, 88, 116) +#define png_oFFs PNG_U32(111, 70, 70, 115) +#define png_pCAL PNG_U32(112, 67, 65, 76) +#define png_pHYs PNG_U32(112, 72, 89, 115) +#define png_sBIT PNG_U32(115, 66, 73, 84) +#define png_sCAL PNG_U32(115, 67, 65, 76) +#define png_sPLT PNG_U32(115, 80, 76, 84) +#define png_sRGB PNG_U32(115, 82, 71, 66) +#define png_sTER PNG_U32(115, 84, 69, 82) +#define png_tEXt PNG_U32(116, 69, 88, 116) +#define png_tIME PNG_U32(116, 73, 77, 69) +#define png_tRNS PNG_U32(116, 82, 78, 83) +#define png_zTXt PNG_U32(122, 84, 88, 116) +#endif + +/* The 8-byte signature as a pair of 32-bit quantities */ +#define sig1 PNG_U32(137, 80, 78, 71) +#define sig2 PNG_U32( 13, 10, 26, 10) + +/* Is the chunk critical? */ +#define CRITICAL(chunk) (((chunk) & PNG_U32(32,0,0,0)) == 0) + +/* Is it safe to copy? */ +#define SAFE_TO_COPY(chunk) (((chunk) & PNG_U32(0,0,0,32)) != 0) + +/* Fix ups for builds with limited read support */ +#ifndef PNG_ERROR_TEXT_SUPPORTED +# define png_error(a,b) png_err(a) +#endif + +/********************************* UTILITIES **********************************/ +/* UNREACHED is a value to cause an assert to fail. Because of the way the + * assert macro is written the string "UNREACHED" is produced in the error + * message. + */ +#define UNREACHED 0 + +/* 80-bit number handling - a PNG image can be up to (2^31-1)x(2^31-1) 8-byte + * (16-bit RGBA) pixels in size; that's less than 2^65 bytes or 2^68 bits, so + * arithmetic of 80-bit numbers is sufficient. This representation uses an + * arbitrary length array of png_uint_16 digits (0..65535). The representation + * is little endian. + * + * The arithmetic functions take zero to two uarb values together with the + * number of digits in those values and write the result to the given uarb + * (always the first argument) returning the number of digits in the result. + * If the result is negative the return value is also negative (this would + * normally be an error). + */ +typedef png_uint_16 udigit; /* A 'unum' is an array of these */ +typedef png_uint_16p uarb; +typedef png_const_uint_16p uarbc; + +#define UDIGITS(unum) ((sizeof unum)/(sizeof (udigit)) + /* IMPORTANT: only apply this to an array, applied to a pointer the result + * will typically be '2', which is not useful. + */ + +static int +uarb_set(uarb result, png_alloc_size_t val) + /* Set (initialize) 'result' to 'val'. The size required for 'result' must + * be determined by the caller from a knowledge of the maximum for 'val'. + */ +{ + int ndigits = 0; + + while (val > 0) + { + result[ndigits++] = (png_uint_16)(val & 0xffff); + val >>= 16; + } + + return ndigits; +} + +static int +uarb_copy(uarb to, uarb from, int idigits) + /* Copy a uarb, may reduce the digit count */ +{ + int d, odigits; + + for (d=odigits=0; d>= 16; + } + + while (add != 0 && add != (-1)) + { + num[out_digits++] = (png_uint_16)(add & 0xffff); + add >>= 16; + } + + if (add == 0) + { + while (out_digits > 0 && num[out_digits-1] == 0) + --out_digits; + return out_digits; /* may be 0 */ + } + + else /* negative result */ + { + while (out_digits > 1 && num[out_digits-1] == 0xffff) + --out_digits; + + return -out_digits; + } +} + +static int +uarb_add32(uarb num, int in_digits, png_uint_32 add) + /* As above but this works with any 32-bit value and only does 'add' */ +{ + if (in_digits > 0) + { + in_digits = uarb_inc(num, in_digits, add & 0xffff); + return uarb_inc(num+1, in_digits-1, add >> 16)+1; + } + + return uarb_set(num, add); +} + +static int +uarb_mult_digit(uarb acc, int a_digits, uarb num, FIX_GCC int n_digits, + png_uint_16 val) + /* Primitive one-digit multiply - 'val' must be 0..65535. Note that this + * primitive is a multiply and accumulate - the result of *num * val is added + * to *acc. + * + * This is a one-digit multiply, so the product may be up to one digit longer + * than 'num', however the add to 'acc' means that the caller must ensure + * that 'acc' is at least one digit longer than this *and* at least one digit + * longer than the current length of 'acc'. (Or the caller must otherwise + * ensure 'adigits' is adequate from knowledge of the values.) + */ +{ + /* The digits in *acc, *num and val are in the range 0..65535, so the + * result below is at most (65535*65535)+2*65635 = 65535*(65535+2), which is + * exactly 0xffffffff. + */ + if (val > 0 && n_digits > 0) /* Else the product is 0 */ + { + png_uint_32 carry = 0; + int out_digits = 0; + + while (out_digits < n_digits || carry > 0) + { + if (out_digits < a_digits) + carry += acc[out_digits]; + + if (out_digits < n_digits) + carry += (png_uint_32)num[out_digits] * val; + + acc[out_digits++] = (png_uint_16)(carry & 0xffff); + carry >>= 16; + } + + /* So carry is 0 and all the input digits have been consumed. This means + * that it is possible to skip any remaining digits in acc. + */ + if (out_digits > a_digits) + return out_digits; + } + + return a_digits; +} + +static int +uarb_mult32(uarb acc, int a_digits, uarb num, int n_digits, png_uint_32 val) + /* calculate acc += num * val, 'val' may be any 32-bit value, 'acc' and 'num' + * may be any value, returns the number of digits in 'acc'. + */ +{ + if (n_digits > 0 && val > 0) + { + a_digits = uarb_mult_digit(acc, a_digits, num, n_digits, + (png_uint_16)(val & 0xffff)); + + val >>= 16; + if (val > 0) + a_digits = uarb_mult_digit(acc+1, a_digits-1, num, n_digits, + (png_uint_16)val) + 1; + + /* Because n_digits and val are >0 the following must be true: */ + assert(a_digits > 0); + } + + return a_digits; +} + +static int +uarb_shift(uarb inout, int ndigits, unsigned int right_shift) + /* Shift inout right by right_shift bits, right_shift must be in the range + * 1..15 + */ +{ + FIX_GCC int i = ndigits; + png_uint_16 carry = 0; + + assert(right_shift >= 1 && right_shift <= 15); + + while (--i >= 0) + { + png_uint_16 temp = (png_uint_16)(carry | (inout[i] >> right_shift)); + + /* Bottom bits to top bits of carry */ + carry = (png_uint_16)((inout[i] << (16-right_shift)) & 0xffff); + + inout[i] = temp; + + /* The shift may reduce ndigits */ + if (i == ndigits-1 && temp == 0) + ndigits = i; + } + + return ndigits; +} + +static int +uarb_cmp(uarb a, int adigits, uarb b, int bdigits) + /* Return -1/0/+1 according as ab */ +{ + if (adigits < bdigits) + return -1; + + if (adigits > bdigits) + return 1; + + while (adigits-- > 0) + if (a[adigits] < b[adigits]) + return -1; + + else if (a[adigits] > b[adigits]) + return 1; + + return 0; +} + +#if 0 /*UNUSED*/ +static int +uarb_eq32(uarb num, int digits, png_uint_32 val) + /* Return true if the uarb is equal to 'val' */ +{ + switch (digits) + { + case 0: return val == 0; + case 1: return val == num[0]; + case 2: return (val & 0xffff) == num[0] && (val >> 16) == num[1]; + default: return 0; + } +} +#endif + +static void +uarb_printx(uarb num, int digits, FILE *out) + /* Print 'num' as a hexadecimal number (easier than decimal!) */ +{ + while (digits > 0) + if (num[--digits] > 0) + { + fprintf(out, "0x%x", num[digits]); + + while (digits > 0) + fprintf(out, "%.4x", num[--digits]); + } + + else if (digits == 0) /* the number is 0 */ + fputs("0x0", out); +} + +static void +uarb_print(uarb num, int digits, FILE *out) + /* Prints 'num' as a decimal if it will fit in an unsigned long, else as a + * hexadecimal number. Notice that the results vary for images over 4GByte + * in a system dependent way, and the hexadecimal form doesn't work very well + * in awk script input. + * + * + * TODO: write uarb_div10 + */ +{ + if (digits * sizeof (udigit) > sizeof (unsigned long)) + uarb_printx(num, digits, out); + + else + { + unsigned long n = 0; + + while (digits > 0) + n = (n << 16) + num[--digits]; + + fprintf(out, "%lu", n); + } +} + +/* Generate random bytes. This uses a boring repeatable algorithm and it + * is implemented here so that it gives the same set of numbers on every + * architecture. It's a linear congruential generator (Knuth or Sedgewick + * "Algorithms") but it comes from the 'feedback taps' table in Horowitz and + * Hill, "The Art of Electronics" (Pseudo-Random Bit Sequences and Noise + * Generation.) + * + * (Copied from contrib/libtests/pngvalid.c) + */ +static void +make_random_bytes(png_uint_32* seed, void* pv, size_t size) +{ + png_uint_32 u0 = seed[0], u1 = seed[1]; + png_bytep bytes = voidcast(png_bytep, pv); + + /* There are thirty-three bits; the next bit in the sequence is bit-33 XOR + * bit-20. The top 1 bit is in u1, the bottom 32 are in u0. + */ + size_t i; + for (i=0; i> (20-8)) ^ ((u1 << 7) | (u0 >> (32-7)))) & 0xff; + u1 <<= 8; + u1 |= u0 >> 24; + u0 <<= 8; + u0 |= u; + *bytes++ = (png_byte)u; + } + + seed[0] = u0; + seed[1] = u1; +} + +/* Clear an object to a random value. */ +static void +clear(void *pv, size_t size) +{ + static png_uint_32 clear_seed[2] = { 0x12345678, 0x9abcdef0 }; + make_random_bytes(clear_seed, pv, size); +} + +#define CLEAR(object) clear(&(object), sizeof (object)) + +/* Copied from unreleased 1.7 code. + * + * CRC checking uses a local pre-built implementation of the Ethernet CRC32. + * This is to avoid a function call to the zlib DLL and to optimize the + * byte-by-byte case. + */ +static png_uint_32 crc_table[256] = +{ + 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, + 0x706af48f, 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, + 0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, + 0x90bf1d91, 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de, + 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856, + 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9, + 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, + 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, + 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, + 0x45df5c75, 0xdcd60dcf, 0xabd13d59, 0x26d930ac, 0x51de003a, + 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599, + 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, + 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, + 0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, + 0x9fbfe4a5, 0xe8b8d433, 0x7807c9a2, 0x0f00f934, 0x9609a88e, + 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01, + 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed, + 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950, + 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, + 0xfbd44c65, 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, + 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, + 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5, + 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 0xbe0b1010, + 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f, + 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, + 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, + 0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615, + 0x73dc1683, 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8, + 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 0xf00f9344, + 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb, + 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, + 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, + 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, + 0xa6bc5767, 0x3fb506dd, 0x48b2364b, 0xd80d2bda, 0xaf0a1b4c, + 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef, + 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, + 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, + 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, + 0x2cd99e8b, 0x5bdeae1d, 0x9b64c2b0, 0xec63f226, 0x756aa39c, + 0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713, + 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b, + 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242, + 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, + 0x18b74777, 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, + 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, 0xa00ae278, + 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7, + 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 0x40df0b66, + 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9, + 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, + 0xcdd70693, 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, + 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, + 0x2d02ef8d +}; + +/* The CRC calculated here *IS* conditioned, the corresponding value used by + * zlib and the result value is obtained by XORing with CRC_INIT, which is also + * the first value that must be passed in (for the first byte) to crc_one_byte. + */ +#define CRC_INIT 0xffffffff + +static png_uint_32 +crc_one_byte(png_uint_32 crc, int b) +{ + return crc_table[(crc ^ b) & 0xff] ^ (crc >> 8); +} + +static png_uint_32 +crc_init_4(png_uint_32 value) +{ + /* This is an alternative to the algorithm used in zlib, which requires four + * separate tables to parallelize the four byte operations, it only works for + * a CRC of the first four bytes of the stream, but this is what happens in + * the parser below where length+chunk-name is read and chunk-name used to + * initialize the CRC. Notice that the calculation here avoids repeated + * conditioning (xor with 0xffffffff) by storing the conditioned value. + */ + png_uint_32 crc = crc_table[(~value >> 24)] ^ 0xffffff; + + crc = crc_table[(crc ^ (value >> 16)) & 0xff] ^ (crc >> 8); + crc = crc_table[(crc ^ (value >> 8)) & 0xff] ^ (crc >> 8); + return crc_table[(crc ^ value) & 0xff] ^ (crc >> 8); +} + +static int +chunk_type_valid(png_uint_32 c) + /* Bit whacking approach to chunk name validation that is intended to avoid + * branches. The cost is that it uses a lot of 32-bit constants, which might + * be bad on some architectures. + */ +{ + png_uint_32 t; + + /* Remove bit 5 from all but the reserved byte; this means every + * 8-bit unit must be in the range 65-90 to be valid. So bit 5 + * must be zero, bit 6 must be set and bit 7 zero. + */ + c &= ~PNG_U32(32,32,0,32); + t = (c & ~0x1f1f1f1f) ^ 0x40404040; + + /* Subtract 65 for each 8-bit quantity, this must not overflow + * and each byte must then be in the range 0-25. + */ + c -= PNG_U32(65,65,65,65); + t |=c ; + + /* Subtract 26, handling the overflow which should set the top + * three bits of each byte. + */ + c -= PNG_U32(25,25,25,26); + t |= ~c; + + return (t & 0xe0e0e0e0) == 0; +} + +/**************************** CONTROL INFORMATION *****************************/ + +/* Information about a sequence of IDAT chunks, the chunks have been re-synced + * using sync_stream below and the new lengths are recorded here. Because the + * number of chunks is unlimited this is handled using a linked list of these + * structures. + */ +struct IDAT_list +{ + struct IDAT_list *next; /* Linked list */ + unsigned int length; /* Actual length of the array below */ + unsigned int count; /* Number of entries that are valid */ +# define IDAT_INIT_LENGTH 16 + png_uint_32 lengths[IDAT_INIT_LENGTH]; +}; + +static void +IDAT_list_init(struct IDAT_list *list) +{ + CLEAR(*list); + + list->next = NULL; + list->length = IDAT_INIT_LENGTH; +} + +static size_t +IDAT_list_size(struct IDAT_list *list, unsigned int length) + /* Return the size in bytes of an IDAT_list of the given length. */ +{ + if (list != NULL) + length = list->length; + + return sizeof *list - sizeof list->lengths + + length * sizeof list->lengths[0]; +} + +static void +IDAT_list_end(struct IDAT_list *IDAT_list) +{ + struct IDAT_list *list = IDAT_list->next; + + CLEAR(*IDAT_list); + + while (list != NULL) + { + struct IDAT_list *next = list->next; + + clear(list, IDAT_list_size(list, 0)); + free(list); + list = next; + } +} + +static struct IDAT_list * +IDAT_list_extend(struct IDAT_list *tail) +{ + /* Use the previous cached value if available. */ + struct IDAT_list *next = tail->next; + + if (next == NULL) + { + /* Insert a new, malloc'ed, block of IDAT information buffers, this + * one twice as large as the previous one: + */ + unsigned int length = 2 * tail->length; + + if (length < tail->length) /* arithmetic overflow */ + length = tail->length; + + next = voidcast(IDAT_list*, malloc(IDAT_list_size(NULL, length))); + CLEAR(*next); + + /* The caller must handle this: */ + if (next == NULL) + return NULL; + + next->next = NULL; + next->length = length; + tail->next = next; + } + + return next; +} + +/* GLOBAL CONTROL STRUCTURE */ +struct global +{ + /* PUBLIC GLOBAL VARIABLES: OWNER INITIALIZE */ + unsigned int errors :1; /* print file errors to stderr */ + unsigned int warnings :1; /* print libpng warnings to stderr */ + unsigned int optimize_zlib :1; /* Run optimization search */ + unsigned int quiet :2; /* don't output summaries */ + unsigned int verbose :3; /* various internal tracking */ + unsigned int skip :3; /* Non-critical chunks to skip */ +# define SKIP_NONE 0 +# define SKIP_BAD_CRC 1 /* Chunks with a bad CRC */ +# define SKIP_UNSAFE 2 /* Chunks not safe to copy */ +# define SKIP_UNUSED 3 /* Chunks not used by libpng */ +# define SKIP_TRANSFORM 4 /* Chunks only used in transforms */ +# define SKIP_COLOR 5 /* Everything but tRNS, sBIT, gAMA and sRGB */ +# define SKIP_ALL 6 /* Everything but tRNS and sBIT */ + + png_uint_32 idat_max; /* 0 to perform no re-chunking */ + + int status_code; /* Accumulated status code */ +# define TOO_FAR_BACK 0x01 /* found a too-far-back error */ +# define CRC_ERROR 0x02 /* fixed an invalid CRC */ +# define STREAM_ERROR 0x04 /* damaged PNG stream (may be fixable) */ +# define TRUNCATED 0x08 /* truncated but still readable */ +# define FILE_ERROR 0x10 /* could not read the file */ +# define WRITE_ERROR 0x20 /* write error (this terminates the read) */ +# define INTERNAL_ERROR 0x40 /* internal limits/errors encountered */ + + /* PUBLIC GLOBAL VARIABLES: USED INTERNALLY BY IDAT READ CODE */ + struct IDAT_list idat_cache; /* Cache of file IDAT information buffers */ + /* The structure is shared across all uses of this global control + * structure to avoid reallocation between IDAT streams. + */ +}; + +static int +global_end(struct global *global) +{ + + int rc; + + IDAT_list_end(&global->idat_cache); + rc = global->status_code; + CLEAR(*global); + return rc; +} + +static void +global_init(struct global *global) + /* Call this once (and only once) to initialize the control */ +{ + CLEAR(*global); + + /* Globals */ + global->errors = 0; + global->warnings = 0; + global->quiet = 0; + global->verbose = 0; + global->idat_max = 0; /* no re-chunking of IDAT */ + global->optimize_zlib = 0; + global->skip = SKIP_NONE; + global->status_code = 0; + + IDAT_list_init(&global->idat_cache); +} + +static int +skip_chunk_type(const struct global *global, png_uint_32 type) + /* Return true if this chunk is to be skipped according to the --strip + * option. This code needs to recognize all known ancillary chunks in order + * to handle the --strip=unsafe option. + */ +{ + /* Never strip critical chunks: */ + if (CRITICAL(type)) + return 0; + + switch (type) + { + /* Chunks that are treated as, effectively, critical because they affect + * correct interpretation of the pixel values: + */ + case png_tRNS: case png_sBIT: + return 0; + + /* Chunks that specify gamma encoding which should therefore only be + * removed if the user insists: + */ + case png_gAMA: case png_sRGB: + if (global->skip >= SKIP_ALL) + return 1; + return 0; + + /* Chunks that affect color interpretation - not used by libpng and rarely + * used by applications, but technically still required for correct + * interpretation of the image data: + */ + case png_cHRM: case png_iCCP: + if (global->skip >= SKIP_COLOR) + return 1; + return 0; + + /* Other chunks that are used by libpng in image transformations (as + * opposed to known chunks that have get/set APIs but are not otherwise + * used.) + */ + case png_bKGD: + if (global->skip >= SKIP_TRANSFORM) + return 1; + return 0; + + /* All other chunks that libpng knows about and affect neither image + * interpretation nor libpng transforms - chunks that are effectively + * unused by libpng even though libpng might recognize and store them. + */ + case png_fRAc: case png_gIFg: case png_gIFt: case png_gIFx: case png_hIST: + case png_iTXt: case png_oFFs: case png_pCAL: case png_pHYs: case png_sCAL: + case png_sPLT: case png_sTER: case png_tEXt: case png_tIME: case png_zTXt: + if (global->skip >= SKIP_UNUSED) + return 1; + return 0; + + /* Chunks that libpng does not know about (notice that this depends on the + * list above including all known chunks!) The decision here depends on + * whether the safe-to-copy bit is set in the chunk type. + */ + default: + if (SAFE_TO_COPY(type)) + { + if (global->skip >= SKIP_UNUSED) /* as above */ + return 1; + } + + else if (global->skip >= SKIP_UNSAFE) + return 1; + + return 0; + } +} + +/* PER-FILE CONTROL STRUCTURE */ +struct chunk; +struct IDAT; +struct file +{ + /* ANCESTORS */ + struct global *global; + + /* PUBLIC PER-FILE VARIABLES: CALLER INITIALIZE */ + const char * file_name; + const char * out_name; /* Name of output file (if required) */ + + /* PUBLIC PER-FILE VARIABLES: SET BY PNG READ CODE */ + /* File specific result codes */ + int status_code; /* Set to a bit mask of the following: */ + int read_errno; /* Records a read error errno */ + int write_errno; /* Records a write error errno */ + + /* IHDR information */ + png_uint_32 width; + png_uint_32 height; + png_byte bit_depth; + png_byte color_type; + png_byte compression_method; + png_byte filter_method; + png_byte interlace_method; + + udigit image_bytes[5]; + int image_digits; + + /* PROTECTED PER-FILE VARIABLES: USED BY THE READ CODE */ + FILE * file; /* Original PNG file */ + FILE * out; /* If a new one is being written */ + jmp_buf jmpbuf; /* Set while reading a PNG */ + + /* PROTECTED CHUNK SPECIFIC VARIABLES: USED BY CHUNK CODE */ + /* The following variables are used during reading to record the length, type + * and data position of the *next* chunk or, right at the start, the + * signature (in length,type). + * + * When a chunk control structure is instantiated these values are copied + * into the structure and can then be overritten with the data for the next + * chunk. + */ + fpos_t data_pos; /* Position of first byte of chunk data */ + png_uint_32 length; /* First word (length or signature start) */ + png_uint_32 type; /* Second word (type or signature end) */ + png_uint_32 crc; /* Running chunk CRC (used by read_chunk) */ + + /* These counts are maintained by the read and write routines below and are + * reset by the chunk handling code. They record the total number of bytes + * read or written for the chunk, including the header (length,type) bytes. + */ + png_uint_32 read_count; /* Count of bytes read (in the chunk) */ + png_uint_32 write_count; /* Count of bytes written (in the chunk) */ + int state; /* As defined here: */ +# define STATE_SIGNATURE 0 /* The signature is being written */ +# define STATE_CHUNKS 1 /* Non-IDAT chunks are being written */ +# define STATE_IDAT 2 /* An IDAT stream is being written */ + + /* Two pointers used to enable clean-up in the event of fatal errors and to + * hold state about the parser process (only one of each at present.) + */ + struct chunk * chunk; + struct IDAT * idat; + + /* Interface to allocate a new chunk or IDAT control structure. The result + * is returned by setting one or other of the above variables. Note that the + * relevant initializer is called by the allocator function. The alloc_ptr + * is used only by the implementation of the allocate function. + */ + void * alloc_ptr; + void (*alloc)(struct file*,int idat); + /* idat: allocate IDAT not chunk */ +}; + +/* Valid longjmp (stop) codes are: */ +#define LIBPNG_WARNING_CODE 1 /* generic png_error */ +#define LIBPNG_ERROR_CODE 2 /* generic png_error */ +#define ZLIB_ERROR_CODE 3 /* generic zlib error */ +#define INVALID_ERROR_CODE 4 /* detected an invalid PNG */ +#define READ_ERROR_CODE 5 /* read failed */ +#define WRITE_ERROR_CODE 6 /* error in write */ +#define UNEXPECTED_ERROR_CODE 7 /* unexpected (internal?) error */ + +static void +emit_string(const char *str, FILE *out) + /* Print a string with spaces replaced by '_' and non-printing characters by + * an octal escape. + */ +{ + for (; *str; ++str) + if (isgraph(UCHAR_MAX & *str)) + putc(*str, out); + + else if (isspace(UCHAR_MAX & *str)) + putc('_', out); + + else + fprintf(out, "\\%.3o", *str); +} + +static const char * +strcode(int code) +{ + switch (code) + { + case LIBPNG_WARNING_CODE: return "warning"; + case LIBPNG_ERROR_CODE: return "libpng"; + case ZLIB_ERROR_CODE: return "zlib"; + case INVALID_ERROR_CODE: return "invalid"; + case READ_ERROR_CODE: return "read"; + case WRITE_ERROR_CODE: return "write"; + case UNEXPECTED_ERROR_CODE: return "unexpected"; + default: return "INVALID"; + } +} + +static void +emit_error(struct file *file, int code, const char *what) + /* Generic error message routine, takes a 'stop' code but can be used + * elsewhere. Always outputs a message. + */ +{ + const char *reason; + int err = 0; + + switch (code) + { + case LIBPNG_WARNING_CODE: reason = "libpng warning:"; break; + case LIBPNG_ERROR_CODE: reason = "libpng error:"; break; + case ZLIB_ERROR_CODE: reason = "zlib error:"; break; + case INVALID_ERROR_CODE: reason = "invalid"; break; + case READ_ERROR_CODE: reason = "read failure:"; + err = file->read_errno; + break; + case WRITE_ERROR_CODE: reason = "write error"; + err = file->write_errno; + break; + case UNEXPECTED_ERROR_CODE: reason = "unexpected error:"; + err = file->read_errno; + if (err == 0) + err = file->write_errno; + break; + default: reason = "INVALID (internal error):"; break; + } + + if (err != 0) + fprintf(stderr, "%s: %s %s [%s]\n", file->file_name, reason, what, + strerror(err)); + + else + fprintf(stderr, "%s: %s %s\n", file->file_name, reason, what); +} + +static void chunk_end(struct chunk **); +static void IDAT_end(struct IDAT **); + +static int +file_end(struct file *file) +{ + int rc; + + /* If either of the chunk pointers are set end them here, the IDAT structure + * must be deallocated first as it may deallocate the chunk structure. + */ + if (file->idat != NULL) + IDAT_end(&file->idat); + + if (file->chunk != NULL) + chunk_end(&file->chunk); + + rc = file->status_code; + + if (file->file != NULL) + (void)fclose(file->file); + + if (file->out != NULL) + { + /* NOTE: this is bitwise |, all the following functions must execute and + * must succeed. + */ + if (ferror(file->out) | fflush(file->out) | fclose(file->out)) + { + perror(file->out_name); + emit_error(file, READ_ERROR_CODE, "output write error"); + rc |= WRITE_ERROR; + } + } + + /* Accumulate the result codes */ + file->global->status_code |= rc; + + CLEAR(*file); + + return rc; /* status code: non-zero on read or write error */ +} + +static int +file_init(struct file *file, struct global *global, const char *file_name, + const char *out_name, void *alloc_ptr, void (*alloc)(struct file*,int)) + /* Initialize a file control structure. This will open the given files as + * well. The status code returned is 0 on success, non zero (using the flags + * above) on a file open error. + */ +{ + CLEAR(*file); + file->global = global; + + file->file_name = file_name; + file->out_name = out_name; + file->status_code = 0; + file->read_errno = 0; + file->write_errno = 0; + + file->file = NULL; + file->out = NULL; + /* jmpbuf is garbage: must be set by read_png */ + + file->read_count = 0; + file->state = STATE_SIGNATURE; + + file->chunk = NULL; + file->idat = NULL; + + file->alloc_ptr = alloc_ptr; + file->alloc = alloc; + + /* Open the files: */ + assert(file_name != NULL); + file->file = fopen(file_name, "rb"); + + if (file->file == NULL) + { + file->read_errno = errno; + file->status_code |= FILE_ERROR; + /* Always output: please give a readable file! */ + perror(file_name); + return FILE_ERROR; + } + + if (out_name != NULL) + { + file->out = fopen(out_name, "wb"); + + if (file->out == NULL) + { + file->write_errno = errno; + file->status_code |= WRITE_ERROR; + perror(out_name); + return WRITE_ERROR; + } + } + + return 0; +} + +static void +log_error(struct file *file, int code, const char *what) + /* Like emit_error but checks the global 'errors' flag */ +{ + if (file->global->errors) + emit_error(file, code, what); +} + +static char +type_char(png_uint_32 v) +{ + /* In fact because chunk::chunk_type is validated prior to any call to this + * function it will always return a-zA-Z, but the extra codes are just there + * to help in finding internal (programming) errors. Note that the code only + * ever considers the low 7 bits of the value (so it is not necessary for the + * type_name function to mask of the byte.) + */ + if (v & 32) + return "!abcdefghijklmnopqrstuvwxyz56789"[(v-96)&31]; + + else + return "@ABCDEFGHIJKLMNOPQRSTUVWXYZ01234"[(v-64)&31]; +} + +static void +type_name(png_uint_32 type, FILE *out) +{ + putc(type_char(type >> 24), out); + putc(type_char(type >> 16), out); + putc(type_char(type >> 8), out); + putc(type_char(type ), out); +} + +static void +type_sep(FILE *out) +{ + putc(':', out); + putc(' ', out); +} + +static png_uint_32 current_type(struct file *file, int code); + +PNG_NORETURN static void +stop(struct file *file, int code, const char *what) + /* Return control when a PNG file cannot be read. This outputs an 'ERR' + * summary line too. + */ +{ + log_error(file, code, what); + + /* The chunk being read is typically identified by file->chunk or, if this is + * NULL, by file->type. This may be wrong if libpng reads ahead, but this + * only happens with IDAT where libpng reads the header then jumps around + * finding errors in the previous chunks. We know that is happening because + * we are at the start of the IDAT (i.e. no IDAT data has yet been written.) + * + * SUMMARY FORMAT (stop): + * + * IDAT ERR status code read-errno write-errno message file + * + * 'uncompressed' will be 0 if there was a problem in the IHDR. The errno + * values are emit_string(strerror(errno)). + */ + if (file->global->quiet < 2) /* need two quiets to stop this. */ + { + png_uint_32 type; + + if (file->chunk != NULL) + type = current_type(file, code); /* Gropes in struct chunk and IDAT */ + + else + type = file->type; + + if (type) + type_name(type, stdout); + + else /* magic: an IDAT header, produces bogons for too many IDATs */ + fputs("HEAD", stdout); /* not a registered chunk! */ + + printf(" ERR %.2x %s ", file->status_code, strcode(code)); + /* This only works one strerror at a time, because of the way strerror is + * implemented. + */ + emit_string(strerror(file->read_errno), stdout); + putc(' ', stdout); + emit_string(strerror(file->write_errno), stdout); + putc(' ', stdout); + emit_string(what, stdout); + putc(' ', stdout); + fputs(file->file_name, stdout); + putc('\n', stdout); + } + + file->status_code |= FILE_ERROR; + longjmp(file->jmpbuf, code); +} + +PNG_NORETURN static void +stop_invalid(struct file *file, const char *what) +{ + stop(file, INVALID_ERROR_CODE, what); +} + +static void +type_message(struct file *file, png_uint_32 type, const char *what) + /* Error message for a chunk; the chunk name comes from 'type' */ +{ + if (file->global->errors) + { + fputs(file->file_name, stderr); + type_sep(stderr); + type_name(type, stderr); + type_sep(stderr); + fputs(what, stderr); + putc('\n', stderr); + } +} + +/* Input file positioning - we jump around in the input file while reading + * stuff, these wrappers deal with the error handling. + */ +static void +file_getpos(struct file *file, fpos_t *pos) +{ + if (fgetpos(file->file, pos)) + { + /* This is unexpected, so perror it */ + perror(file->file_name); + stop(file, READ_ERROR_CODE, "fgetpos"); + } +} + +static void +file_setpos(struct file *file, const fpos_t *pos) +{ + if (fsetpos(file->file, pos)) + { + perror(file->file_name); + stop(file, READ_ERROR_CODE, "fsetpos"); + } +} + +static void +getpos(struct file *file) + /* Get the current position and store it in 'data_pos'. The corresponding + * setpos() function is chunk specific because it uses the copy of the + * position for the specific chunk. + */ +{ + file_getpos(file, &file->data_pos); +} + + +/* Read utility - read a single byte, returns a value in the range 0..255 or EOF + * on a read error. In the latter case status_code and read_errno are updated + * appropriately. + */ +static int +read_byte(struct file *file) +{ + int ch = getc(file->file); + + if (ch >= 0 && ch <= 255) + { + ++(file->read_count); + return ch; + } + + else if (ch != EOF) + { + file->status_code |= INTERNAL_ERROR; + file->read_errno = ERANGE; /* out of range character */ + + /* This is very unexpected; an error message is always output: */ + emit_error(file, UNEXPECTED_ERROR_CODE, "file read"); + } + +# ifdef EINTR + else if (errno == EINTR) /* Interrupted, try again */ + { + errno = 0; + return read_byte(file); + } +# endif + + else + { + /* An error, it doesn't really matter what the error is but it gets + * recorded anyway. + */ + if (ferror(file->file)) + file->read_errno = errno; + + else if (feof(file->file)) + file->read_errno = 0; /* I.e. a regular EOF, no error */ + + else /* unexpected */ + file->read_errno = EDOM; + } + + /* 'TRUNCATED' is used for all cases of failure to read a byte, because of + * the way libpng works a byte read is never attempted unless the byte is + * expected to be there, so EOF should not occur. + */ + file->status_code |= TRUNCATED; + return EOF; +} + +static png_byte +reread_byte(struct file *file) + /* Read a byte when an error is not expected to happen because the byte has + * been read before without error. + */ +{ + int ch = getc(file->file); + + if (errno != 0) + file->read_errno = errno; + + if (ch < 0 || ch > 255) + stop(file, UNEXPECTED_ERROR_CODE, "reread"); + + return (png_byte)ch; +} + +static png_uint_32 +reread_4(struct file *file) + /* The same but for a four byte quantity */ +{ + png_uint_32 result = 0; + int i = 0; + + while (++i <= 4) + result = (result << 8) + reread_byte(file); + + return result; +} + +static void +skip_12(struct file *file) + /* Skip exactly 12 bytes in the input stream - used to skip a CRC and chunk + * header that has been read before. + */ +{ + /* Since the chunks were read before this shouldn't fail: */ + if (fseek(file->file, 12, SEEK_CUR) != 0) + { + if (errno != 0) + file->read_errno = errno; + + stop(file, UNEXPECTED_ERROR_CODE, "reskip"); + } +} + +static void +write_byte(struct file *file, int b) + /* Write one byte to the output - this causes a fatal error if the write + * fails and the read of this PNG file immediately terminates. Just + * increments the write count if there is no output file. + */ +{ + if (file->out != NULL) + { + if (putc(b, file->out) != b) + { + file->write_errno = errno; + file->status_code |= WRITE_ERROR; + stop(file, WRITE_ERROR_CODE, "write byte"); + } + } + + ++(file->write_count); +} + +/* Derivatives of the read/write functions. */ +static unsigned int +read_4(struct file *file, png_uint_32 *pu) + /* Read four bytes, returns the number of bytes read successfully and, if all + * four bytes are read, assigns the result to *pu. + */ +{ + unsigned int i = 0; + png_uint_32 val = 0; + + do + { + int ch = read_byte(file); + + if (ch == EOF) + return i; + + val = (val << 8) + ch; + } while (++i < 4); + + *pu = val; + return i; +} + +/* CRC handling - read but calculate the CRC while doing so. */ +static int +crc_read_many(struct file *file, png_uint_32 length) + /* Reads 'length' bytes and updates the CRC, returns true on success, false + * if the input is truncated. + */ +{ + if (length > 0) + { + png_uint_32 crc = file->crc; + + do + { + int ch = read_byte(file); + + if (ch == EOF) + return 0; /* Truncated */ + + crc = crc_one_byte(crc, ch); + } + while (--length > 0); + + file->crc = crc; + } + + return 1; /* OK */ +} + +static int +calc_image_size(struct file *file) + /* Fill in the image_bytes field given the IHDR information, calls stop on + * error. + */ +{ + png_uint_16 pd = file->bit_depth; + + switch (file->color_type) + { + default: + stop_invalid(file, "IHDR: colour type"); + + invalid_bit_depth: + stop_invalid(file, "IHDR: bit depth"); + + case 0: /* g */ + if (pd != 1 && pd != 2 && pd != 4 && pd != 8 && pd != 16) + goto invalid_bit_depth; + break; + + case 3: + if (pd != 1 && pd != 2 && pd != 4 && pd != 8) + goto invalid_bit_depth; + break; + + case 2: /* rgb */ + if (pd != 8 && pd != 16) + goto invalid_bit_depth; + + pd = (png_uint_16)(pd * 3); + break; + + case 4: /* ga */ + if (pd != 8 && pd != 16) + goto invalid_bit_depth; + + pd = (png_uint_16)(pd * 2); + break; + + case 6: /* rgba */ + if (pd != 8 && pd != 16) + goto invalid_bit_depth; + + pd = (png_uint_16)(pd * 4); + break; + } + + if (file->width < 1 || file->width > 0x7fffffff) + stop_invalid(file, "IHDR: width"); + + else if (file->height < 1 || file->height > 0x7fffffff) + stop_invalid(file, "IHDR: height"); + + else if (file->compression_method != 0) + stop_invalid(file, "IHDR: compression method"); + + else if (file->filter_method != 0) + stop_invalid(file, "IHDR: filter method"); + + else switch (file->interlace_method) + { + case PNG_INTERLACE_ADAM7: + /* Interlacing makes the image larger because of the replication of + * both the filter byte and the padding to a byte boundary. + */ + { + int pass; + int image_digits = 0; + udigit row_width[2], row_bytes[3]; + + for (pass=0; pass<=6; ++pass) + { + png_uint_32 pw = PNG_PASS_COLS(file->width, pass); + + if (pw > 0) + { + int digits; + + /* calculate 1+((pw*pd+7)>>3) in row_bytes */ + digits = uarb_mult_digit(row_bytes, uarb_set(row_bytes, 7), + row_width, uarb_set(row_width, pw), pd); + digits = uarb_shift(row_bytes, digits, 3); + digits = uarb_inc(row_bytes, digits, 1); + + /* Add row_bytes * pass-height to the file image_bytes field + */ + image_digits = uarb_mult32(file->image_bytes, image_digits, + row_bytes, digits, + PNG_PASS_ROWS(file->height, pass)); + } + } + + file->image_digits = image_digits; + } + break; + + case PNG_INTERLACE_NONE: + { + int digits; + udigit row_width[2], row_bytes[3]; + + /* As above, but use image_width in place of the pass width: */ + digits = uarb_mult_digit(row_bytes, uarb_set(row_bytes, 7), + row_width, uarb_set(row_width, file->width), pd); + digits = uarb_shift(row_bytes, digits, 3); + digits = uarb_inc(row_bytes, digits, 1); + + /* Set row_bytes * image-height to the file image_bytes field */ + file->image_digits = uarb_mult32(file->image_bytes, 0, + row_bytes, digits, file->height); + } + break; + + default: + stop_invalid(file, "IHDR: interlace method"); + } + + assert(file->image_digits >= 1 && file->image_digits <= 5); + return 1; +} + +/* PER-CHUNK CONTROL STRUCTURE + * This structure is instantiated for each chunk, except for the IDAT chunks + * where one chunk control structure is used for the whole of a single stream of + * IDAT chunks (see the IDAT control structure below). + */ +struct chunk +{ + /* ANCESTORS */ + struct file * file; + struct global * global; + + /* PUBLIC IDAT INFORMATION: SET BY THE ZLIB CODE */ + udigit uncompressed_bytes[5]; + int uncompressed_digits; + udigit compressed_bytes[5]; + int compressed_digits; + + /* PUBLIC PER-CHUNK INFORMATION: USED BY CHUNK READ CODE */ + /* This information is filled in by chunk_init from the data in the file + * control structure, but chunk_length may be changed later. + */ + fpos_t chunk_data_pos; /* Position of first byte of chunk data */ + png_uint_32 chunk_length; /* From header (or modified below) */ + png_uint_32 chunk_type; /* From header */ + + /* PUBLIC PER-CHUNK INFORMATION: FOR THE CHUNK WRITE CODE */ + png_uint_32 write_crc; /* Output CRC (may differ from read_crc) */ + png_uint_32 rewrite_offset; /* Count of bytes before rewrite. */ + int rewrite_length; /* Number of bytes left to change */ + png_byte rewrite_buffer[2]; /* Buffer of new byte values */ +}; + +static void +chunk_message(struct chunk *chunk, const char *message) +{ + type_message(chunk->file, chunk->chunk_type, message); +} + +static void +chunk_end(struct chunk **chunk_var) +{ + struct chunk *chunk = *chunk_var; + + *chunk_var = NULL; + CLEAR(*chunk); +} + +static void +chunk_init(struct chunk * const chunk, struct file * const file) + /* When a chunk is initialized the file length/type/pos are copied into the + * corresponding chunk fields and the new chunk is registered in the file + * structure. There can only be one chunk at a time. + * + * NOTE: this routine must onely be called from the file alloc routine! + */ +{ + assert(file->chunk == NULL); + + CLEAR(*chunk); + + chunk->file = file; + chunk->global = file->global; + + chunk->chunk_data_pos = file->data_pos; + chunk->chunk_length = file->length; + chunk->chunk_type = file->type; + + /* Compresssed/uncompressed size information (from the zlib control structure + * that is used to check the compressed data in a chunk.) + */ + chunk->uncompressed_digits = 0; + chunk->compressed_digits = 0; + + file->chunk = chunk; +} + +static png_uint_32 +current_type(struct file *file, int code) + /* Guess the actual chunk type that causes a stop() */ +{ + /* This may return png_IDAT for errors detected (late) in the header; that + * includes any inter-chunk consistency check that libpng performs. Assume + * that if the chunk_type is png_IDAT and the file write count is 8 this is + * what is happening. + */ + if (file->chunk != NULL) + { + png_uint_32 type = file->chunk->chunk_type; + + /* This is probably wrong for the excess IDATs case, because then libpng + * whines about too many of them (apparently in some cases erroneously) + * when the header is read. + */ + if (code <= LIBPNG_ERROR_CODE && type == png_IDAT && + file->write_count == 8) + type = 0; /* magic */ + + return type; + } + + else + return file->type; +} + +static void +setpos(struct chunk *chunk) + /* Reset the position to 'chunk_data_pos' - the start of the data for this + * chunk. As a side effect the read_count in the file is reset to 8, just + * after the length/type header. + */ +{ + chunk->file->read_count = 8; + file_setpos(chunk->file, &chunk->chunk_data_pos); +} + +/* Specific chunk handling - called for each chunk header, all special chunk + * processing is initiated in these functions. + */ +/* The next functions handle special processing for those chunks with LZ data, + * the data is identified and checked for validity. If there are problems which + * cannot be corrected the routines return false, otherwise true (although + * modification to the zlib header may be required.) + * + * The compressed data is in zlib format (RFC1950) and consequently has a + * minimum length of 7 bytes. + */ +static int zlib_check(struct file *file, png_uint_32 offset); + +static int +process_zTXt_iCCP(struct file *file) + /* zTXt and iCCP have exactly the same form - keyword, null, compression + * method then compressed data. + */ +{ + struct chunk *chunk = file->chunk; + png_uint_32 length; + png_uint_32 index = 0; + + assert(chunk != NULL && file->idat == NULL); + length = chunk->chunk_length; + setpos(chunk); + + while (length >= 9) + { + --length; + ++index; + if (reread_byte(file) == 0) /* keyword null terminator */ + { + --length; + ++index; + (void)reread_byte(file); /* compression method */ + return zlib_check(file, index); + } + } + + chunk_message(chunk, "too short"); + return 0; /* skip */ +} + +static int +process_iTXt(struct file *file) +{ + /* Like zTXt but more fields. */ + struct chunk *chunk = file->chunk; + png_uint_32 length; + png_uint_32 index = 0; + + assert(chunk != NULL && file->idat == NULL); + length = chunk->chunk_length; + setpos(chunk); + + while (length >= 5) + { + --length; + ++index; + if (reread_byte(file) == 0) /* keyword null terminator */ + { + --length; + ++index; + if (reread_byte(file) == 0) /* uncompressed text */ + return 1; /* nothing to check */ + + --length; + ++index; + (void)reread_byte(file); /* compression method */ + + /* Skip the language tag (null terminated). */ + while (length >= 9) + { + --length; + ++index; + if (reread_byte(file) == 0) /* terminator */ + { + /* Skip the translated keyword */ + while (length >= 8) + { + --length; + ++index; + if (reread_byte(file) == 0) /* terminator */ + return zlib_check(file, index); + } + } + } + + /* Ran out of bytes in the compressed case. */ + break; + } + } + + log_error(file, INVALID_ERROR_CODE, "iTXt chunk length"); + + return 0; /* skip */ +} + +/* IDAT READ/WRITE CONTROL STRUCTURE */ +struct IDAT +{ + /* ANCESTORS */ + struct file * file; + struct global * global; + + /* PROTECTED IDAT INFORMATION: SET BY THE IDAT READ CODE */ + struct IDAT_list *idat_list_head; /* START of the list of IDAT information */ + struct IDAT_list *idat_list_tail; /* *END* of the list of IDAT information */ + + /* PROTECTED IDAT INFORMATION: USED BY THE IDAT WRITE CODE */ + struct IDAT_list *idat_cur; /* Current list entry */ + unsigned int idat_count; /* And the *current* index into the list */ + png_uint_32 idat_index; /* Index of *next* input byte to write */ + png_uint_32 idat_length; /* Cache of current chunk length */ +}; + +/* NOTE: there is currently no IDAT_reset, so a stream cannot contain more than + * one IDAT sequence (i.e. MNG is not supported). + */ + +static void +IDAT_end(struct IDAT **idat_var) +{ + struct IDAT *idat = *idat_var; + struct file *file = idat->file; + + *idat_var = NULL; + + CLEAR(*idat); + + assert(file->chunk != NULL); + chunk_end(&file->chunk); + + /* Regardless of why the IDAT was killed set the state back to CHUNKS (it may + * already be CHUNKS because the state isn't changed until process_IDAT + * returns; a stop will cause IDAT_end to be entered in state CHUNKS!) + */ + file->state = STATE_CHUNKS; +} + +static void +IDAT_init(struct IDAT * const idat, struct file * const file) + /* When the chunk is png_IDAT instantiate an IDAT control structure in place + * of a chunk control structure. The IDAT will instantiate a chunk control + * structure using the file alloc routine. + * + * NOTE: this routine must only be called from the file alloc routine! + */ +{ + assert(file->chunk == NULL); + assert(file->idat == NULL); + + CLEAR(*idat); + + idat->file = file; + idat->global = file->global; + + /* Initialize the tail to the pre-allocated buffer and set the count to 0 + * (empty.) + */ + idat->global->idat_cache.count = 0; + idat->idat_list_head = idat->idat_list_tail = &idat->global->idat_cache; + + /* Now the chunk. The allocator calls the initializer of the new chunk and + * stores the result in file->chunk: + */ + file->alloc(file, 0/*chunk*/); + assert(file->chunk != NULL); + + /* And store this for cleanup (and to check for double alloc or failure to + * free.) + */ + file->idat = idat; +} + +static png_uint_32 +rechunk_length(struct IDAT *idat, int start) + /* Return the length for the next IDAT chunk, taking into account + * rechunking. + */ +{ + png_uint_32 len = idat->global->idat_max; + + if (len == 0) /* use original chunk lengths */ + { + const struct IDAT_list *cur; + unsigned int count; + + if (start) + return idat->idat_length; /* use the cache */ + + /* Otherwise rechunk_length is called at the end of a chunk for the length + * of the next one. + */ + cur = idat->idat_cur; + count = idat->idat_count; + + assert(idat->idat_index == idat->idat_length && + idat->idat_length == cur->lengths[count]); + + /* Return length of the *next* chunk */ + if (++count < cur->count) + return cur->lengths[count]; + + /* End of this list */ + assert(cur != idat->idat_list_tail); + cur = cur->next; + assert(cur != NULL && cur->count > 0); + return cur->lengths[0]; + } + + else /* rechunking */ + { + /* The chunk size is the lesser of file->idat_max and the number + * of remaining bytes. + */ + png_uint_32 have = idat->idat_length - idat->idat_index; + + if (len > have) + { + struct IDAT_list *cur = idat->idat_cur; + unsigned int j = idat->idat_count+1; /* the next IDAT in the list */ + + do + { + /* Add up the remaining bytes. This can't overflow because the + * individual lengths are always <= 0x7fffffff, so when we add two + * of them overflow is not possible. + */ + assert(cur != NULL); + + for (;;) + { + /* NOTE: IDAT_list::count here, not IDAT_list::length */ + for (; j < cur->count; ++j) + { + have += cur->lengths[j]; + if (len <= have) + return len; + } + + /* If this was the end return the count of the available bytes */ + if (cur == idat->idat_list_tail) + return have; + + cur = cur->next; + j = 0; + } + } + while (len > have); + } + + return len; + } +} + +static int +process_IDAT(struct file *file) + /* Process the IDAT stream, this is the more complex than the preceding + * cases because the compressed data is spread across multiple IDAT chunks + * (typically). Rechunking of the data is not handled here; all this + * function does is establish whether the zlib header needs to be modified. + * + * Initially the function returns false, indicating that the chunk should not + * be written. It does this until the last IDAT chunk is passed in, then it + * checks the zlib data and returns true. + * + * It does not return false on a fatal error; it calls stop instead. + * + * The caller must have an instantiated (IDAT) control structure and it must + * have extent over the whole read of the IDAT stream. For a PNG this means + * the whole PNG read, for MNG it could have lesser extent. + */ +{ + struct IDAT_list *list; + + assert(file->idat != NULL && file->chunk != NULL); + + /* We need to first check the entire sequence of IDAT chunks to ensure the + * stream is in sync. Do this by building a list of all the chunks and + * recording the length of each because the length may have been fixed up by + * sync_stream below. + * + * At the end of the list of chunks, where the type of the next chunk is not + * png_IDAT, process the whole stream using the list data to check validity + * then return control to the start and rewrite everything. + */ + list = file->idat->idat_list_tail; + + if (list->count == list->length) + { + list = IDAT_list_extend(list); + + if (list == NULL) + stop(file, READ_ERROR_CODE, "out of memory"); + + /* Move to the next block */ + list->count = 0; + file->idat->idat_list_tail = list; + } + + /* And fill in the next IDAT information buffer. */ + list->lengths[(list->count)++] = file->chunk->chunk_length; + + /* The type of the next chunk was recorded in the file control structure by + * the caller, if this is png_IDAT return 'skip' to the caller. + */ + if (file->type == png_IDAT) + return 0; /* skip this for the moment */ + + /* This is the final IDAT chunk, so run the tests to check for the too far + * back error and possibly optimize the window bits. This means going back + * to the start of the first chunk data, which is stored in the original + * chunk allocation. + */ + setpos(file->chunk); + + if (zlib_check(file, 0)) + { + struct IDAT *idat; + int cmp; + + /* The IDAT stream was successfully uncompressed; see whether it + * contained the correct number of bytes of image data. + */ + cmp = uarb_cmp(file->image_bytes, file->image_digits, + file->chunk->uncompressed_bytes, file->chunk->uncompressed_digits); + + if (cmp < 0) + type_message(file, png_IDAT, "extra uncompressed data"); + + else if (cmp > 0) + stop(file, LIBPNG_ERROR_CODE, "IDAT: uncompressed data too small"); + + /* Return the stream to the start of the first IDAT chunk; the length + * is set in the write case below but the input chunk variables must be + * set (once) here: + */ + setpos(file->chunk); + + idat = file->idat; + idat->idat_cur = idat->idat_list_head; + idat->idat_length = idat->idat_cur->lengths[0]; + idat->idat_count = 0; /* Count of chunks read in current list */ + idat->idat_index = 0; /* Index into chunk data */ + + /* Update the chunk length to the correct value for the IDAT chunk: */ + file->chunk->chunk_length = rechunk_length(idat, 1/*start*/); + + /* Change the state to writing IDAT chunks */ + file->state = STATE_IDAT; + + return 1; + } + + else /* Failure to decompress the IDAT stream; give up. */ + stop(file, ZLIB_ERROR_CODE, "could not uncompress IDAT"); +} + +/* ZLIB CONTROL STRUCTURE */ +struct zlib +{ + /* ANCESTORS */ + struct IDAT * idat; /* NOTE: May be NULL */ + struct chunk * chunk; + struct file * file; + struct global *global; + + /* GLOBAL ZLIB INFORMATION: SET BY THE CALLER */ + png_uint_32 rewrite_offset; + + /* GLOBAL ZLIB INFORMATION: SET BY THE ZLIB READ CODE */ + udigit compressed_bytes[5]; + int compressed_digits; + udigit uncompressed_bytes[5]; + int uncompressed_digits; + int file_bits; /* window bits from the file */ + int ok_bits; /* Set <16 on a successful read */ + int cksum; /* Set on a checksum error */ + + /* PROTECTED ZLIB INFORMATION: USED BY THE ZLIB ROUTINES */ + z_stream z; + png_uint_32 extra_bytes; /* Count of extra compressed bytes */ + int state; + int rc; /* Last return code */ + int window_bits; /* 0 if no change */ + png_byte header[2]; +}; + +static const char * +zlib_flevel(struct zlib *zlib) +{ + switch (zlib->header[1] >> 6) + { + case 0: return "supfast"; + case 1: return "stdfast"; + case 2: return "default"; + case 3: return "maximum"; + default: assert(UNREACHED); + } + + return "COMPILER BUG"; +} + +static const char * +zlib_rc(struct zlib *zlib) + /* Return a string for the zlib return code */ +{ + switch (zlib->rc) + { + case Z_OK: return "Z_OK"; + case Z_STREAM_END: return "Z_STREAM_END"; + case Z_NEED_DICT: return "Z_NEED_DICT"; + case Z_ERRNO: return "Z_ERRNO"; + case Z_STREAM_ERROR: return "Z_STREAM_ERROR"; + case Z_DATA_ERROR: return "Z_DATA_ERROR"; + case Z_MEM_ERROR: return "Z_MEM_ERROR"; + case Z_BUF_ERROR: return "Z_BUF_ERROR"; + case Z_VERSION_ERROR: return "Z_VERSION_ERROR"; + default: return "Z_*INVALID_RC*"; + } +} + +static void +zlib_message(struct zlib *zlib, int unexpected) + /* Output a message given a zlib rc */ +{ + if (zlib->global->errors) + { + const char *reason = zlib->z.msg; + + if (reason == NULL) + reason = "[no message]"; + + fputs(zlib->file->file_name, stderr); + type_sep(stderr); + type_name(zlib->chunk->chunk_type, stderr); + fprintf(stderr, ": %szlib error: %d (%s) (%s)\n", + unexpected ? "unexpected " : "", zlib->rc, zlib_rc(zlib), reason); + } +} + +static void +zlib_end(struct zlib *zlib) +{ + /* Output the summary line now; this ensures a summary line always gets + * output regardless of the manner of exit. + */ + if (!zlib->global->quiet) + { + if (zlib->ok_bits < 16) /* stream was read ok */ + { + const char *reason; + + if (zlib->cksum) + reason = "CHK"; /* checksum error */ + + else if (zlib->ok_bits > zlib->file_bits) + reason = "TFB"; /* fixing a too-far-back error */ + + else if (zlib->ok_bits == zlib->file_bits) + reason = "OK "; + + else + reason = "OPT"; /* optimizing window bits */ + + /* SUMMARY FORMAT (for a successful zlib inflate): + * + * IDAT reason flevel file-bits ok-bits compressed uncompressed file + */ + type_name(zlib->chunk->chunk_type, stdout); + printf(" %s %s %d %d ", reason, zlib_flevel(zlib), zlib->file_bits, + zlib->ok_bits); + uarb_print(zlib->compressed_bytes, zlib->compressed_digits, stdout); + putc(' ', stdout); + uarb_print(zlib->uncompressed_bytes, zlib->uncompressed_digits, + stdout); + putc(' ', stdout); + fputs(zlib->file->file_name, stdout); + putc('\n', stdout); + } + + else + { + /* This is a zlib read error; the chunk will be skipped. For an IDAT + * stream this will also cause a fatal read error (via stop()). + * + * SUMMARY FORMAT: + * + * IDAT SKP flevel file-bits z-rc compressed message file + * + * z-rc is the zlib failure code; message is the error message with + * spaces replaced by '-'. The compressed byte count indicates where + * in the zlib stream the error occurred. + */ + type_name(zlib->chunk->chunk_type, stdout); + printf(" SKP %s %d %s ", zlib_flevel(zlib), zlib->file_bits, + zlib_rc(zlib)); + uarb_print(zlib->compressed_bytes, zlib->compressed_digits, stdout); + putc(' ', stdout); + emit_string(zlib->z.msg ? zlib->z.msg : "[no_message]", stdout); + putc(' ', stdout); + fputs(zlib->file->file_name, stdout); + putc('\n', stdout); + } + } + + if (zlib->state >= 0) + { + zlib->rc = inflateEnd(&zlib->z); + + if (zlib->rc != Z_OK) + zlib_message(zlib, 1/*unexpected*/); + } + + CLEAR(*zlib); +} + +static int +zlib_reset(struct zlib *zlib, int window_bits) + /* Reinitializes a zlib with a different window_bits */ +{ + assert(zlib->state >= 0); /* initialized by zlib_init */ + + zlib->z.next_in = Z_NULL; + zlib->z.avail_in = 0; + zlib->z.next_out = Z_NULL; + zlib->z.avail_out = 0; + + zlib->window_bits = window_bits; + zlib->compressed_digits = 0; + zlib->uncompressed_digits = 0; + + zlib->state = 0; /* initialized, once */ + zlib->rc = inflateReset2(&zlib->z, 0); + if (zlib->rc != Z_OK) + { + zlib_message(zlib, 1/*unexpected*/); + return 0; + } + + return 1; +} + +static int +zlib_init(struct zlib *zlib, struct IDAT *idat, struct chunk *chunk, + int window_bits, png_uint_32 offset) + /* Initialize a zlib_control; the result is true/false */ +{ + CLEAR(*zlib); + + zlib->idat = idat; + zlib->chunk = chunk; + zlib->file = chunk->file; + zlib->global = chunk->global; + zlib->rewrite_offset = offset; /* never changed for this zlib */ + + /* *_out does not need to be set: */ + zlib->z.next_in = Z_NULL; + zlib->z.avail_in = 0; + zlib->z.zalloc = Z_NULL; + zlib->z.zfree = Z_NULL; + zlib->z.opaque = Z_NULL; + + zlib->state = -1; + zlib->window_bits = window_bits; + + zlib->compressed_digits = 0; + zlib->uncompressed_digits = 0; + + /* These values are sticky across reset (in addition to the stuff in the + * first block, which is actually constant.) + */ + zlib->file_bits = 24; + zlib->ok_bits = 16; /* unset */ + zlib->cksum = 0; /* set when a checksum error is detected */ + + /* '0' means use the header; inflateInit2 should always succeed because it + * does nothing apart from allocating the internal zstate. + */ + zlib->rc = inflateInit2(&zlib->z, 0); + if (zlib->rc != Z_OK) + { + zlib_message(zlib, 1/*unexpected*/); + return 0; + } + + else + { + zlib->state = 0; /* initialized */ + return 1; + } +} + +static int +max_window_bits(uarbc size, int ndigits) + /* Return the zlib stream window bits required for data of the given size. */ +{ + png_uint_16 cb; + + if (ndigits > 1) + return 15; + + cb = size[0]; + + if (cb > 16384) return 15; + if (cb > 8192) return 14; + if (cb > 4096) return 13; + if (cb > 2048) return 12; + if (cb > 1024) return 11; + if (cb > 512) return 10; + if (cb > 256) return 9; + return 8; +} + +static int +zlib_advance(struct zlib *zlib, png_uint_32 nbytes) + /* Read nbytes compressed bytes; the stream will be initialized if required. + * Bytes are always being reread and errors are fatal. The return code is as + * follows: + * + * -1: saw the "too far back" error + * 0: ok, keep going + * 1: saw Z_STREAM_END (zlib->extra_bytes indicates too much data) + * 2: a zlib error that cannot be corrected (error message already + * output if required.) + */ +# define ZLIB_TOO_FAR_BACK (-1) +# define ZLIB_OK 0 +# define ZLIB_STREAM_END 1 +# define ZLIB_FATAL 2 +{ + int state = zlib->state; + int endrc = ZLIB_OK; + png_uint_32 in_bytes = 0; + struct file *file = zlib->file; + + assert(state >= 0); + + while (in_bytes < nbytes && endrc == ZLIB_OK) + { + png_uint_32 out_bytes; + int flush; + png_byte bIn = reread_byte(file); + png_byte bOut; + + switch (state) + { + case 0: /* first header byte */ + { + int file_bits = 8+(bIn >> 4); + int new_bits = zlib->window_bits; + + zlib->file_bits = file_bits; + + /* Check against the existing value - it may not need to be + * changed. Note that a bogus file_bits is allowed through once, + * to see if it works, but the window_bits value is set to 15, + * the maximum. + */ + if (new_bits == 0) /* no change */ + zlib->window_bits = ((file_bits > 15) ? 15 : file_bits); + + else if (new_bits != file_bits) /* rewrite required */ + bIn = (png_byte)((bIn & 0xf) + ((new_bits-8) << 4)); + } + + zlib->header[0] = bIn; + zlib->state = state = 1; + break; + + case 1: /* second header byte */ + { + int b2 = bIn & 0xe0; /* top 3 bits */ + + /* The checksum calculation, on the first 11 bits: */ + b2 += 0x1f - ((zlib->header[0] << 8) + b2) % 0x1f; + + /* Update the checksum byte if required: */ + if (bIn != b2) + { + /* If the first byte wasn't changed this indicates an error in + * the checksum calculation; signal this by setting 'cksum'. + */ + if (zlib->file_bits == zlib->window_bits) + zlib->cksum = 1; + + bIn = (png_byte)b2; + } + } + + zlib->header[1] = bIn; + zlib->state = state = 2; + break; + + default: /* After the header bytes */ + break; + } + + /* For some streams, perhaps only those compressed with 'superfast + * compression' (which results in a lot of copying) Z_BUF_ERROR can happen + * immediately after all output has been flushed on the next input byte. + * This is handled below when Z_BUF_ERROR is detected by adding an output + * byte. + */ + zlib->z.next_in = &bIn; + zlib->z.avail_in = 1; + zlib->z.next_out = &bOut; + zlib->z.avail_out = 0; /* Initially */ + + /* Initially use Z_NO_FLUSH in an attempt to persuade zlib to look at this + * byte without confusing what is going on with output. + */ + flush = Z_NO_FLUSH; + out_bytes = 0; + + /* NOTE: expression 3 is only evaluated on 'continue', because of the + * 'break' at the end of this loop below. + */ + for (;endrc == ZLIB_OK; + flush = Z_SYNC_FLUSH, + zlib->z.next_out = &bOut, + zlib->z.avail_out = 1, + ++out_bytes) + { + zlib->rc = inflate(&zlib->z, flush); + out_bytes -= zlib->z.avail_out; + + switch (zlib->rc) + { + case Z_BUF_ERROR: + if (zlib->z.avail_out == 0) + continue; /* Try another output byte. */ + + if (zlib->z.avail_in == 0) + break; /* Try another input byte */ + + /* Both avail_out and avail_in are 1 yet zlib returned a code + * indicating no progress was possible. This is unexpected. + */ + zlib_message(zlib, 1/*unexpected*/); + endrc = ZLIB_FATAL; /* stop processing */ + break; + + case Z_OK: + /* Zlib is supposed to have made progress: */ + assert(zlib->z.avail_out == 0 || zlib->z.avail_in == 0); + continue; + + case Z_STREAM_END: + /* This is the successful end. */ + zlib->state = 3; /* end of stream */ + endrc = ZLIB_STREAM_END; + break; + + case Z_NEED_DICT: + zlib_message(zlib, 0/*stream error*/); + endrc = ZLIB_FATAL; + break; + + case Z_DATA_ERROR: + /* The too far back error can be corrected, others cannot: */ + if (zlib->z.msg != NULL && + strcmp(zlib->z.msg, "invalid distance too far back") == 0) + { + endrc = ZLIB_TOO_FAR_BACK; + break; + } + /* FALLTHROUGH */ + + default: + zlib_message(zlib, 0/*stream error*/); + endrc = ZLIB_FATAL; + break; + } /* switch (inflate rc) */ + + /* Control gets here when further output is not possible; endrc may + * still be ZLIB_OK if more input is required. + */ + break; + } /* for (output bytes) */ + + /* Keep a running count of output byte produced: */ + zlib->uncompressed_digits = uarb_add32(zlib->uncompressed_bytes, + zlib->uncompressed_digits, out_bytes); + + /* Keep going, the loop will terminate when endrc is no longer set to + * ZLIB_OK or all the input bytes have been consumed; meanwhile keep + * adding input bytes. + */ + assert(zlib->z.avail_in == 0 || endrc != ZLIB_OK); + + in_bytes += 1 - zlib->z.avail_in; + } /* while (input bytes) */ + + assert(in_bytes == nbytes || endrc != ZLIB_OK); + + /* Update the running total of input bytes consumed */ + zlib->compressed_digits = uarb_add32(zlib->compressed_bytes, + zlib->compressed_digits, in_bytes - zlib->z.avail_in); + + /* At the end of the stream update the chunk with the accumulated + * information if it is an improvement: + */ + if (endrc == ZLIB_STREAM_END && zlib->window_bits < zlib->ok_bits) + { + struct chunk *chunk = zlib->chunk; + + chunk->uncompressed_digits = uarb_copy(chunk->uncompressed_bytes, + zlib->uncompressed_bytes, zlib->uncompressed_digits); + chunk->compressed_digits = uarb_copy(chunk->compressed_bytes, + zlib->compressed_bytes, zlib->compressed_digits); + chunk->rewrite_buffer[0] = zlib->header[0]; + chunk->rewrite_buffer[1] = zlib->header[1]; + + if (zlib->window_bits != zlib->file_bits || zlib->cksum) + { + /* A rewrite is required */ + chunk->rewrite_offset = zlib->rewrite_offset; + chunk->rewrite_length = 2; + } + + else + { + chunk->rewrite_offset = 0; + chunk->rewrite_length = 0; + } + + if (in_bytes < nbytes) + chunk_message(chunk, "extra compressed data"); + + zlib->extra_bytes = nbytes - in_bytes; + zlib->ok_bits = zlib->window_bits; + } + + return endrc; +} + +static int +zlib_run(struct zlib *zlib) + /* Like zlib_advance but also handles a stream of IDAT chunks. */ +{ + /* The 'extra_bytes' field is set by zlib_advance if there is extra + * compressed data in the chunk it handles (if it sees Z_STREAM_END before + * all the input data has been used.) This function uses the value to update + * the correct chunk length, so the problem should only ever be detected once + * for each chunk. zlib_advance outputs the error message, though see the + * IDAT specific check below. + */ + zlib->extra_bytes = 0; + + if (zlib->idat != NULL) + { + struct IDAT_list *list = zlib->idat->idat_list_head; + struct IDAT_list *last = zlib->idat->idat_list_tail; + int skip = 0; + + /* 'rewrite_offset' is the offset of the LZ data within the chunk, for + * IDAT it should be 0: + */ + assert(zlib->rewrite_offset == 0); + + /* Process each IDAT_list in turn; the caller has left the stream + * positioned at the start of the first IDAT chunk data. + */ + for (;;) + { + unsigned int count = list->count; + unsigned int i; + + for (i = 0; i 0) /* Skip CRC and next IDAT header */ + skip_12(zlib->file); + + skip = 12; /* for the next time */ + + rc = zlib_advance(zlib, list->lengths[i]); + + switch (rc) + { + case ZLIB_OK: /* keep going */ + break; + + case ZLIB_STREAM_END: /* stop */ + /* There may be extra chunks; if there are and one of them is + * not zero length output the 'extra data' message. Only do + * this check if errors are being output. + */ + if (zlib->global->errors && zlib->extra_bytes == 0) + { + struct IDAT_list *check = list; + int j = i+1, jcount = count; + + for (;;) + { + for (; jlengths[j] > 0) + { + chunk_message(zlib->chunk, + "extra compressed data"); + goto end_check; + } + + if (check == last) + break; + + check = check->next; + jcount = check->count; + j = 0; + } + } + + end_check: + /* Terminate the list at the current position, reducing the + * length of the last IDAT too if required. + */ + list->lengths[i] -= zlib->extra_bytes; + list->count = i+1; + zlib->idat->idat_list_tail = list; + /* FALLTHROUGH */ + + default: + return rc; + } + } + + /* At the end of the compressed data and Z_STREAM_END was not seen. */ + if (list == last) + return ZLIB_OK; + + list = list->next; + } + } + + else + { + struct chunk *chunk = zlib->chunk; + int rc; + + assert(zlib->rewrite_offset < chunk->chunk_length); + + rc = zlib_advance(zlib, chunk->chunk_length - zlib->rewrite_offset); + + /* The extra bytes in the chunk are handled now by adjusting the chunk + * length to exclude them; the zlib data is always stored at the end of + * the PNG chunk (although clearly this is not necessary.) zlib_advance + * has already output a warning message. + */ + chunk->chunk_length -= zlib->extra_bytes; + return rc; + } +} + +static int /* global function; not a member function */ +zlib_check(struct file *file, png_uint_32 offset) + /* Check the stream of zlib compressed data in either idat (if given) or (if + * not) chunk. In fact it is zlib_run that handles the difference in reading + * a single chunk and a list of IDAT chunks. + * + * In either case the input file must be positioned at the first byte of zlib + * compressed data (the first header byte). + * + * The return value is true on success, including the case where the zlib + * header may need to be rewritten, and false on an unrecoverable error. + * + * In the case of IDAT chunks 'offset' should be 0. + */ +{ + fpos_t start_pos; + struct zlib zlib; + + /* Record the start of the LZ data to allow a re-read. */ + file_getpos(file, &start_pos); + + /* First test the existing (file) window bits: */ + if (zlib_init(&zlib, file->idat, file->chunk, 0/*window bits*/, offset)) + { + int min_bits, max_bits, rc; + + /* The first run using the existing window bits. */ + rc = zlib_run(&zlib); + + switch (rc) + { + case ZLIB_TOO_FAR_BACK: + /* too far back error */ + file->status_code |= TOO_FAR_BACK; + min_bits = zlib.window_bits + 1; + max_bits = 15; + break; + + case ZLIB_STREAM_END: + if (!zlib.global->optimize_zlib && + zlib.window_bits == zlib.file_bits && !zlib.cksum) + { + /* The trivial case where the stream is ok and optimization was + * not requested. + */ + zlib_end(&zlib); + return 1; + } + + max_bits = max_window_bits(zlib.uncompressed_bytes, + zlib.uncompressed_digits); + if (zlib.ok_bits < max_bits) + max_bits = zlib.ok_bits; + min_bits = 8; + + /* cksum is set if there is an error in the zlib header checksum + * calculation in the original file (and this may be the only reason + * a rewrite is required). We can't rely on the file window bits in + * this case, so do the optimization anyway. + */ + if (zlib.cksum) + chunk_message(zlib.chunk, "zlib checksum"); + break; + + + case ZLIB_OK: + /* Truncated stream; unrecoverable, gets converted to ZLIB_FATAL */ + zlib.z.msg = PNGZ_MSG_CAST("[truncated]"); + zlib_message(&zlib, 0/*expected*/); + /* FALLTHROUGH */ + + default: + /* Unrecoverable error; skip the chunk; a zlib_message has already + * been output. + */ + zlib_end(&zlib); + return 0; + } + + /* Optimize window bits or fix a too-far-back error. min_bits and + * max_bits have been set appropriately, ok_bits records the bit value + * known to work. + */ + while (min_bits < max_bits || max_bits < zlib.ok_bits/*if 16*/) + { + int test_bits = (min_bits + max_bits) >> 1; + + if (zlib_reset(&zlib, test_bits)) + { + file_setpos(file, &start_pos); + rc = zlib_run(&zlib); + + switch (rc) + { + case ZLIB_TOO_FAR_BACK: + min_bits = test_bits+1; + if (min_bits > max_bits) + { + /* This happens when the stream really is damaged and it + * contains a distance code that addresses bytes before + * the start of the uncompressed data. + */ + assert(test_bits == 15); + + /* Output the error that wasn't output before: */ + if (zlib.z.msg == NULL) + zlib.z.msg = PNGZ_MSG_CAST( + "invalid distance too far back"); + zlib_message(&zlib, 0/*stream error*/); + zlib_end(&zlib); + return 0; + } + break; + + case ZLIB_STREAM_END: /* success */ + max_bits = test_bits; + break; + + default: + /* A fatal error; this happens if a too-far-back error was + * hiding a more serious error, zlib_advance has already + * output a zlib_message. + */ + zlib_end(&zlib); + return 0; + } + } + + else /* inflateReset2 failed */ + { + zlib_end(&zlib); + return 0; + } + } + + /* The loop guarantees this */ + assert(zlib.ok_bits == max_bits); + zlib_end(&zlib); + return 1; + } + + else /* zlib initialization failed - skip the chunk */ + { + zlib_end(&zlib); + return 0; + } +} + +/***************************** LIBPNG CALLBACKS *******************************/ +/* The strategy here is to run a regular libpng PNG file read but examine the + * input data (from the file) before passing it to libpng so as to be aware of + * the state we expect libpng to be in. Warning and error callbacks are also + * intercepted so that they can be quieted and interpreted. Interpretation + * depends on a somewhat risky string match for known error messages; let us + * hope that this can be fixed in the next version of libpng. + * + * The control structure is pointed to by the libpng error pointer. It contains + * that set of structures which must persist across multiple read callbacks, + * which is pretty much everything except the 'zlib' control structure. + * + * The file structure is instantiated in the caller of the per-file routine, but + * the per-file routine contains the chunk and IDAT control structures. + */ +/* The three routines read_chunk, process_chunk and sync_stream can only be + * called via a call to read_chunk and only exit at a return from process_chunk. + * These routines could have been written as one confusing large routine, + * instead this code relies on the compiler to do tail call elimination. The + * possible calls are as follows: + * + * read_chunk + * -> sync_stream + * -> process_chunk + * -> process_chunk + * -> read_chunk + * returns + */ +static void read_chunk(struct file *file); +static void +process_chunk(struct file *file, png_uint_32 file_crc, png_uint_32 next_length, + png_uint_32 next_type) + /* Called when the chunk data has been read, next_length and next_type + * will be set for the next chunk (or 0 if this is IEND). + * + * When this routine returns, chunk_length and chunk_type will be set for the + * next chunk to write because if a chunk is skipped this return calls back + * to read_chunk. + */ +{ + png_uint_32 type = file->type; + + if (file->global->verbose > 1) + { + fputs(" ", stderr); + type_name(file->type, stderr); + fprintf(stderr, " %lu 0x%.8x 0x%.8x\n", (unsigned long)file->length, + file->crc ^ 0xffffffff, file_crc); + } + + /* The basic structure seems correct but the CRC may not match, in this + * case assume that it is simply a bad CRC, either wrongly calculated or + * because of damaged stream data. + */ + if ((file->crc ^ 0xffffffff) != file_crc) + { + /* The behavior is set by the 'skip' setting; if it is anything other + * than SKIP_BAD_CRC ignore the bad CRC and return the chunk, with a + * corrected CRC and possibly processed, to libpng. Otherwise skip the + * chunk, which will result in a fatal error if the chunk is critical. + */ + file->status_code |= CRC_ERROR; + + /* Ignore the bad CRC */ + if (file->global->skip != SKIP_BAD_CRC) + type_message(file, type, "bad CRC"); + + /* This will cause an IEND with a bad CRC to stop */ + else if (CRITICAL(type)) + stop(file, READ_ERROR_CODE, "bad CRC in critical chunk"); + + else + { + type_message(file, type, "skipped: bad CRC"); + + /* NOTE: this cannot be reached for IEND because it is critical. */ + goto skip_chunk; + } + } + + /* Check for other 'skip' cases and handle these; these only apply to + * ancillary chunks (and not tRNS, which should probably have been a critical + * chunk.) + */ + if (skip_chunk_type(file->global, type)) + goto skip_chunk; + + /* The chunk may still be skipped if problems are detected in the LZ data, + * however the LZ data check requires a chunk. Handle this by instantiating + * a chunk unless an IDAT is already instantiated (IDAT control structures + * instantiate their own chunk.) + */ + if (type != png_IDAT) + file->alloc(file, 0/*chunk*/); + + else if (file->idat == NULL) + file->alloc(file, 1/*IDAT*/); + + else + { + /* The chunk length must be updated for process_IDAT */ + assert(file->chunk != NULL); + assert(file->chunk->chunk_type == png_IDAT); + file->chunk->chunk_length = file->length; + } + + /* Record the 'next' information too, now that the original values for + * this chunk have been copied. Notice that the IDAT chunks only make a + * copy of the position of the first chunk, this is fine - process_IDAT does + * not need the position of this chunk. + */ + file->length = next_length; + file->type = next_type; + getpos(file); + + /* Do per-type processing, note that if this code does not return from the + * function the chunk will be skipped. The rewrite is cancelled here so that + * it can be set in the per-chunk processing. + */ + file->chunk->rewrite_length = 0; + file->chunk->rewrite_offset = 0; + switch (type) + { + default: + return; + + case png_IHDR: + /* Read this now and update the control structure with the information + * it contains. The header is validated completely to ensure this is a + * PNG. + */ + { + struct chunk *chunk = file->chunk; + + if (chunk->chunk_length != 13) + stop_invalid(file, "IHDR length"); + + /* Read all the IHDR information and validate it. */ + setpos(chunk); + file->width = reread_4(file); + file->height = reread_4(file); + file->bit_depth = reread_byte(file); + file->color_type = reread_byte(file); + file->compression_method = reread_byte(file); + file->filter_method = reread_byte(file); + file->interlace_method = reread_byte(file); + + /* This validates all the fields, and calls stop_invalid if + * there is a problem. + */ + calc_image_size(file); + } + return; + + /* Ancillary chunks that require further processing: */ + case png_zTXt: case png_iCCP: + if (process_zTXt_iCCP(file)) + return; + chunk_end(&file->chunk); + file_setpos(file, &file->data_pos); + break; + + case png_iTXt: + if (process_iTXt(file)) + return; + chunk_end(&file->chunk); + file_setpos(file, &file->data_pos); + break; + + case png_IDAT: + if (process_IDAT(file)) + return; + /* First pass: */ + assert(next_type == png_IDAT); + break; + } + + /* Control reaches this point if the chunk must be skipped. For chunks other + * than IDAT this means that the zlib compressed data is fatally damanged and + * the chunk will not be passed to libpng. For IDAT it means that the end of + * the IDAT stream has not yet been reached and we must handle the next + * (IDAT) chunk. If the LZ data in an IDAT stream cannot be read 'stop' must + * be used to halt parsing of the PNG. + */ + read_chunk(file); + return; + + /* This is the generic code to skip the current chunk; simply jump to the + * next one. + */ +skip_chunk: + file->length = next_length; + file->type = next_type; + getpos(file); + read_chunk(file); +} + +static png_uint_32 +get32(png_bytep buffer, int offset) + /* Read a 32-bit value from an 8-byte circular buffer (used only below). + */ +{ + return + (buffer[ offset & 7] << 24) + + (buffer[(offset+1) & 7] << 16) + + (buffer[(offset+2) & 7] << 8) + + (buffer[(offset+3) & 7] ); +} + +static void +sync_stream(struct file *file) + /* The stream seems to be messed up, attempt to resync from the current chunk + * header. Executes stop on a fatal error, otherwise calls process_chunk. + */ +{ + png_uint_32 file_crc; + + file->status_code |= STREAM_ERROR; + + if (file->global->verbose) + { + fputs(" SYNC ", stderr); + type_name(file->type, stderr); + putc('\n', stderr); + } + + /* Return to the start of the chunk data */ + file_setpos(file, &file->data_pos); + file->read_count = 8; + + if (read_4(file, &file_crc) == 4) /* else completely truncated */ + { + /* Ignore the recorded chunk length, proceed through the data looking for + * a leading sequence of bytes that match the CRC in the following four + * bytes. Each time a match is found check the next 8 bytes for a valid + * length, chunk-type pair. + */ + png_uint_32 length; + png_uint_32 type = file->type; + png_uint_32 crc = crc_init_4(type); + png_byte buffer[8]; + unsigned int nread = 0, nused = 0; + + for (length=0; length <= 0x7fffffff; ++length) + { + int ch; + + if ((crc ^ 0xffffffff) == file_crc) + { + /* A match on the CRC; for IEND this is sufficient, but for anything + * else expect a following chunk header. + */ + if (type == png_IEND) + { + file->length = length; + process_chunk(file, file_crc, 0, 0); + return; + } + + else + { + /* Need 8 bytes */ + while (nread < 8+nused) + { + ch = read_byte(file); + if (ch == EOF) + goto truncated; + buffer[(nread++) & 7] = (png_byte)ch; + } + + /* Prevent overflow */ + nread -= nused & ~7; + nused -= nused & ~7; /* or, nused &= 7 ;-) */ + + /* Examine the 8 bytes for a valid chunk header. */ + { + png_uint_32 next_length = get32(buffer, nused); + + if (next_length < 0x7fffffff) + { + png_uint_32 next_type = get32(buffer, nused+4); + + if (chunk_type_valid(next_type)) + { + file->read_count -= 8; + process_chunk(file, file_crc, next_length, next_type); + return; + } + } + + /* Not valid, keep going. */ + } + } + } + + /* This catches up with the circular buffer which gets filled above + * while checking a chunk header. This code is slightly tricky - if + * the chunk_type is IEND the buffer will never be used, if it is not + * the code will always read ahead exactly 8 bytes and pass this on to + * process_chunk. So the invariant that IEND leaves the file position + * after the IEND CRC and other chunk leave it after the *next* chunk + * header is not broken. + */ + if (nread <= nused) + { + ch = read_byte(file); + + if (ch == EOF) + goto truncated; + } + + else + ch = buffer[(++nused) & 7]; + + crc = crc_one_byte(crc, file_crc >> 24); + file_crc = (file_crc << 8) + ch; + } + + /* Control gets to here if when 0x7fffffff bytes (plus 8) have been read, + * ok, treat this as a damaged stream too: + */ + } + +truncated: + stop(file, READ_ERROR_CODE, "damaged PNG stream"); +} + +static void +read_chunk(struct file *file) + /* On entry file::data_pos must be set to the position of the first byte + * of the chunk data *and* the input file must be at this position. This + * routine (via process_chunk) instantiates a chunk or IDAT control structure + * based on file::length and file::type and also resets these fields and + * file::data_pos for the chunk after this one. For an IDAT chunk the whole + * stream of IDATs will be read, until something other than an IDAT is + * encountered, and the file fields will be set for the chunk after the end + * of the stream of IDATs. + * + * For IEND the file::type field will be set to 0, and nothing beyond the end + * of the IEND chunk will have been read. + */ +{ + png_uint_32 length = file->length; + png_uint_32 type = file->type; + + /* After IEND file::type is set to 0, if libpng attempts to read + * more data at this point this is a bug in libpng. + */ + if (type == 0) + stop(file, UNEXPECTED_ERROR_CODE, "read beyond IEND"); + + if (file->global->verbose > 2) + { + fputs(" ", stderr); + type_name(type, stderr); + fprintf(stderr, " %lu\n", (unsigned long)length); + } + + /* Start the read_crc calculation with the chunk type, then read to the end + * of the chunk data (without processing it in any way) to check that it is + * all there and calculate the CRC. + */ + file->crc = crc_init_4(type); + if (crc_read_many(file, length)) /* else it was truncated */ + { + png_uint_32 file_crc; /* CRC read from file */ + unsigned int nread = read_4(file, &file_crc); + + if (nread == 4) + { + if (type != png_IEND) /* do not read beyond IEND */ + { + png_uint_32 next_length; + + nread += read_4(file, &next_length); + if (nread == 8 && next_length <= 0x7fffffff) + { + png_uint_32 next_type; + + nread += read_4(file, &next_type); + + if (nread == 12 && chunk_type_valid(next_type)) + { + /* Adjust the read count back to the correct value for this + * chunk. + */ + file->read_count -= 8; + process_chunk(file, file_crc, next_length, next_type); + return; + } + } + } + + else /* IEND */ + { + process_chunk(file, file_crc, 0, 0); + return; + } + } + } + + /* Control gets to here if the stream seems invalid or damaged in some + * way. Either there was a problem reading all the expected data (this + * chunk's data, its CRC and the length and type of the next chunk) or the + * next chunk length/type are invalid. Notice that the cases that end up + * here all correspond to cases that would otherwise terminate the read of + * the PNG file. + */ + sync_stream(file); +} + +/* This returns a file* from a png_struct in an implementation specific way. */ +static struct file *get_control(png_const_structrp png_ptr); + +static void PNGCBAPI +error_handler(png_structp png_ptr, png_const_charp message) +{ + stop(get_control(png_ptr), LIBPNG_ERROR_CODE, message); +} + +static void PNGCBAPI +warning_handler(png_structp png_ptr, png_const_charp message) +{ + struct file *file = get_control(png_ptr); + + if (file->global->warnings) + emit_error(file, LIBPNG_WARNING_CODE, message); +} + +/* Read callback - this is where the work gets done to check the stream before + * passing it to libpng + */ +static void PNGCBAPI +read_callback(png_structp png_ptr, png_bytep buffer, size_t count) + /* Return 'count' bytes to libpng in 'buffer' */ +{ + struct file *file = get_control(png_ptr); + png_uint_32 type, length; /* For the chunk be *WRITTEN* */ + struct chunk *chunk; + + /* libpng should always ask for at least one byte */ + if (count == 0) + stop(file, UNEXPECTED_ERROR_CODE, "read callback for 0 bytes"); + + /* The callback always reads ahead by 8 bytes - the signature or chunk header + * - these bytes are stored in chunk_length and chunk_type. This block is + * executed once for the signature and once for the first chunk right at the + * start. + */ + if (file->read_count < 8) + { + assert(file->read_count == 0); + assert((file->status_code & TRUNCATED) == 0); + + (void)read_4(file, &file->length); + + if (file->read_count == 4) + (void)read_4(file, &file->type); + + if (file->read_count < 8) + { + assert((file->status_code & TRUNCATED) != 0); + stop(file, READ_ERROR_CODE, "not a PNG (too short)"); + } + + if (file->state == STATE_SIGNATURE) + { + if (file->length != sig1 || file->type != sig2) + stop(file, LIBPNG_ERROR_CODE, "not a PNG (signature)"); + + /* Else write it (this is the initialization of write_count, prior to + * this it contains CLEAR garbage.) + */ + file->write_count = 0; + } + + else + { + assert(file->state == STATE_CHUNKS); + + /* The first chunk must be a well formed IHDR (this could be relaxed to + * use the checks in process_chunk, but that seems unnecessary.) + */ + if (file->length != 13 || file->type != png_IHDR) + stop(file, LIBPNG_ERROR_CODE, "not a PNG (IHDR)"); + + /* The position of the data must be stored too */ + getpos(file); + } + } + + /* Retrieve previous state (because the read callbacks are made pretty much + * byte-by-byte in the sequential reader prior to 1.7). + */ + chunk = file->chunk; + + if (chunk != NULL) + { + length = chunk->chunk_length; + type = chunk->chunk_type; + } + + else + { + /* This is the signature case; for IDAT and other chunks these values will + * be overwritten when read_chunk is called below. + */ + length = file->length; + type = file->type; + } + + do + { + png_uint_32 b; + + /* Complete the read of a chunk; as a side effect this also instantiates + * a chunk control structure and sets the file length/type/data_pos fields + * for the *NEXT* chunk header. + * + * NOTE: at an IDAT any following IDAT chunks will also be read and the + * next_ fields will refer to the chunk after the last IDAT. + * + * NOTE: read_chunk only returns when it has read a chunk that must now be + * written. + */ + if (file->state != STATE_SIGNATURE && chunk == NULL) + { + assert(file->read_count == 8); + assert(file->idat == NULL); + read_chunk(file); + chunk = file->chunk; + assert(chunk != NULL); + + /* Do the initialization that was not done before. */ + length = chunk->chunk_length; + type = chunk->chunk_type; + + /* And start writing the new chunk. */ + file->write_count = 0; + } + + /* The chunk_ fields describe a chunk that must be written, or hold the + * signature. Write the header first. In the signature case this + * rewrites the signature. + */ + switch (file->write_count) + { + case 0: b = length >> 24; break; + case 1: b = length >> 16; break; + case 2: b = length >> 8; break; + case 3: b = length ; break; + + case 4: b = type >> 24; break; + case 5: b = type >> 16; break; + case 6: b = type >> 8; break; + case 7: b = type ; break; + + case 8: + /* The header has been written. If this is really the signature + * that's all that is required and we can go to normal chunk + * processing. + */ + if (file->state == STATE_SIGNATURE) + { + /* The signature has been written, the tail call to read_callback + * below (it's just a goto to the start with a decent compiler) + * will read the IHDR header ahead and validate it. + */ + assert(length == sig1 && type == sig2); + file->read_count = 0; /* Forces a header read */ + file->state = STATE_CHUNKS; /* IHDR: checked above */ + read_callback(png_ptr, buffer, count); + return; + } + + else + { + assert(chunk != NULL); + + /* Set up for write, notice that repositioning the input stream + * is only necessary if something is to be read from it. Also + * notice that for the IDAT stream this must only happen once - + * on the first IDAT - to get back to the start of the list and + * this is done inside process_IDAT: + */ + chunk->write_crc = crc_init_4(type); + if (file->state != STATE_IDAT && length > 0) + setpos(chunk); + } + /* FALLTHROUGH */ + + default: + assert(chunk != NULL); + + /* NOTE: the arithmetic below overflows and gives a large positive + * png_uint_32 value until the whole chunk data has been written. + */ + switch (file->write_count - length) + { + /* Write the chunk data, normally this just comes from + * the file. The only exception is for that part of a + * chunk which is zlib data and which must be rewritten, + * and IDAT chunks which can be completely + * reconstructed. + */ + default: + if (file->state == STATE_IDAT) + { + struct IDAT *idat = file->idat; + + assert(idat != NULL); + + /* Read an IDAT byte from the input stream of IDAT chunks. + * Because the IDAT stream can be re-chunked this stream is + * held in the struct IDAT members. The chunk members, in + * particular chunk_length (and therefore the length local) + * refer to the output chunk. + */ + while (idat->idat_index >= idat->idat_length) + { + /* Advance one chunk */ + struct IDAT_list *cur = idat->idat_cur; + + assert(idat->idat_index == idat->idat_length); + assert(cur != NULL && cur->count > 0); + + /* NOTE: IDAT_list::count here, not IDAT_list::length */ + if (++(idat->idat_count) >= cur->count) + { + assert(idat->idat_count == cur->count); + + /* Move on to the next IDAT_list: */ + cur = cur->next; + + /* This is an internal error - read beyond the end of + * the pre-calculated stream. + */ + if (cur == NULL || cur->count == 0) + stop(file, UNEXPECTED_ERROR_CODE, + "read beyond end of IDAT"); + + idat->idat_count = 0; + idat->idat_cur = cur; + } + + idat->idat_index = 0; + /* Zero length IDAT chunks are permitted, so the length + * here may be 0. + */ + idat->idat_length = cur->lengths[idat->idat_count]; + + /* And skip 12 bytes to the next chunk data */ + skip_12(file); + } + + /* The index is always that of the next byte, the rest of + * the information is always the current IDAT chunk and the + * current list. + */ + ++(idat->idat_index); + } + + /* Read the byte from the stream. */ + b = reread_byte(file); + + /* If the byte must be rewritten handle that here */ + if (chunk->rewrite_length > 0) + { + if (chunk->rewrite_offset > 0) + --(chunk->rewrite_offset); + + else + { + b = chunk->rewrite_buffer[0]; + memmove(chunk->rewrite_buffer, chunk->rewrite_buffer+1, + (sizeof chunk->rewrite_buffer)- + (sizeof chunk->rewrite_buffer[0])); + + --(chunk->rewrite_length); + } + } + + chunk->write_crc = crc_one_byte(chunk->write_crc, b); + break; + + /* The CRC is written at: + * + * chunk_write == chunk_length+8..chunk_length+11 + * + * so 8 to 11. The CRC is not (yet) conditioned. + */ + case 8: b = chunk->write_crc >> 24; goto write_crc; + case 9: b = chunk->write_crc >> 16; goto write_crc; + case 10: b = chunk->write_crc >> 8; goto write_crc; + case 11: + /* This must happen before the chunk_end below: */ + b = chunk->write_crc; + + if (file->global->verbose > 2) + { + fputs(" ", stderr); + type_name(type, stderr); + fprintf(stderr, " %lu 0x%.8x\n", (unsigned long)length, + chunk->write_crc ^ 0xffffffff); + } + + /* The IDAT stream is written without a call to read_chunk + * until the end is reached. rechunk_length() calculates the + * length of the output chunks. Control gets to this point at + * the end of an *output* chunk - the length calculated by + * rechunk_length. If this corresponds to the end of the + * input stream stop writing IDAT chunks, otherwise continue. + */ + if (file->state == STATE_IDAT && + (file->idat->idat_index < file->idat->idat_length || + 1+file->idat->idat_count < file->idat->idat_cur->count || + file->idat->idat_cur != file->idat->idat_list_tail)) + { + /* Write another IDAT chunk. Call rechunk_length to + * calculate the length required. + */ + length = chunk->chunk_length = + rechunk_length(file->idat, 0/*end*/); + assert(type == png_IDAT); + file->write_count = 0; /* for the new chunk */ + --(file->write_count); /* fake out the increment below */ + } + + else + { + /* Entered at the end of a non-IDAT chunk and at the end of + * the IDAT stream. The rewrite should have been cleared. + */ + if (chunk->rewrite_length > 0 || chunk->rewrite_offset > 0) + stop(file, UNEXPECTED_ERROR_CODE, "pending rewrite"); + + /* This is the last byte so reset chunk_read for the next + * chunk and move the input file to the position after the + * *next* chunk header if required. + */ + file->read_count = 8; + file_setpos(file, &file->data_pos); + + if (file->idat == NULL) + chunk_end(&file->chunk); + + else + IDAT_end(&file->idat); + } + + write_crc: + b ^= 0xff; /* conditioning */ + break; + } + break; + } + + /* Write one byte */ + b &= 0xff; + *buffer++ = (png_byte)b; + --count; + write_byte(file, (png_byte)b); /* increments chunk_write */ + } + while (count > 0); +} + +/* Bundle the file and an uninitialized chunk and IDAT control structure + * together to allow implementation of the chunk/IDAT allocate routine. + */ +struct control +{ + struct file file; + struct chunk chunk; + struct IDAT idat; +}; + +static int +control_end(struct control *control) +{ + return file_end(&control->file); +} + +static struct file * +get_control(png_const_structrp png_ptr) +{ + /* This just returns the (file*). The chunk and idat control structures + * don't always exist. + */ + struct control *control = voidcast(struct control*, + png_get_error_ptr(png_ptr)); + return &control->file; +} + +static void +allocate(struct file *file, int allocate_idat) +{ + struct control *control = voidcast(struct control*, file->alloc_ptr); + + if (allocate_idat) + { + assert(file->idat == NULL); + IDAT_init(&control->idat, file); + } + + else /* chunk */ + { + assert(file->chunk == NULL); + chunk_init(&control->chunk, file); + } +} + +static int +control_init(struct control *control, struct global *global, + const char *file_name, const char *out_name) + /* This wraps file_init(&control::file) and simply returns the result from + * file_init. + */ +{ + return file_init(&control->file, global, file_name, out_name, control, + allocate); +} + +static int +read_png(struct control *control) + /* Read a PNG, return 0 on success else an error (status) code; a bit mask as + * defined for file::status_code as above. + */ +{ + png_structp png_ptr; + png_infop info_ptr = NULL; + volatile int rc; + + png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, control, + error_handler, warning_handler); + + if (png_ptr == NULL) + { + /* This is not really expected. */ + log_error(&control->file, LIBPNG_ERROR_CODE, "OOM allocating png_struct"); + control->file.status_code |= INTERNAL_ERROR; + return LIBPNG_ERROR_CODE; + } + + rc = setjmp(control->file.jmpbuf); + if (rc == 0) + { +# ifdef PNG_SET_USER_LIMITS_SUPPORTED + /* Remove any limits on the size of PNG files that can be read, + * without this we may reject files based on built-in safety + * limits. + */ + png_set_user_limits(png_ptr, 0x7fffffff, 0x7fffffff); + png_set_chunk_cache_max(png_ptr, 0); + png_set_chunk_malloc_max(png_ptr, 0); +# endif + + png_set_read_fn(png_ptr, control, read_callback); + + info_ptr = png_create_info_struct(png_ptr); + if (info_ptr == NULL) + png_error(png_ptr, "OOM allocating info structure"); + + if (control->file.global->verbose) + fprintf(stderr, " INFO\n"); + + png_read_info(png_ptr, info_ptr); + + { + png_uint_32 height = png_get_image_height(png_ptr, info_ptr); + int passes = png_set_interlace_handling(png_ptr); + int pass; + + png_start_read_image(png_ptr); + + for (pass = 0; pass < passes; ++pass) + { + png_uint_32 y = height; + + /* NOTE: this skips asking libpng to return either version of + * the image row, but libpng still reads the rows. + */ + while (y-- > 0) + png_read_row(png_ptr, NULL, NULL); + } + } + + if (control->file.global->verbose) + fprintf(stderr, " END\n"); + + /* Make sure to read to the end of the file: */ + png_read_end(png_ptr, info_ptr); + } + + png_destroy_read_struct(&png_ptr, &info_ptr, NULL); + return rc; +} + +static int +one_file(struct global *global, const char *file_name, const char *out_name) +{ + int rc; + struct control control; + + if (global->verbose) + fprintf(stderr, "FILE %s -> %s\n", file_name, + out_name ? out_name : ""); + + /* Although control_init can return a failure code the structure is always + * initialized, so control_end can be used to accumulate any status codes. + */ + rc = control_init(&control, global, file_name, out_name); + + if (rc == 0) + rc = read_png(&control); + + rc |= control_end(&control); + + return rc; +} + +static void +usage(const char *prog) +{ + /* ANSI C-90 limits strings to 509 characters, so use a string array: */ + size_t i; + static const char *usage_string[] = { +" Tests, optimizes and optionally fixes the zlib header in PNG files.", +" Optionally, when fixing, strips ancillary chunks from the file.", +0, +"OPTIONS", +" OPERATION", +" By default files are just checked for readability with a summary of the", +" of zlib issues founds for each compressed chunk and the IDAT stream in", +" the file.", +" --optimize (-o):", +" Find the smallest deflate window size for the compressed data.", +" --strip=[none|crc|unsafe|unused|transform|color|all]:", +" none (default): Retain all chunks.", +" crc: Remove chunks with a bad CRC.", +" unsafe: Remove chunks that may be unsafe to retain if the image data", +" is modified. This is set automatically if --max is given but", +" may be cancelled by a later --strip=none.", +" unused: Remove chunks not used by libpng when decoding an image.", +" This retains any chunks that might be used by libpng image", +" transformations.", +" transform: unused+bKGD.", +" color: transform+iCCP and cHRM.", +" all: color+gAMA and sRGB.", +" Only ancillary chunks are ever removed. In addition the tRNS and sBIT", +" chunks are never removed as they affect exact interpretation of the", +" image pixel values. The following known chunks are treated specially", +" by the above options:", +" gAMA, sRGB [all]: These specify the gamma encoding used for the pixel", +" values.", +" cHRM, iCCP [color]: These specify how colors are encoded. iCCP also", +" specifies the exact encoding of a pixel value; however, in", +" practice most programs will ignore it.", +" bKGD [transform]: This is used by libpng transforms." +" --max=:", +" Use IDAT chunks sized . If no number is given the IDAT", +" chunks will be the maximum size permitted; 2^31-1 bytes. If the option", +" is omitted the original chunk sizes will not be changed. When the", +" option is given --strip=unsafe is set automatically. This may be", +" cancelled if you know that all unknown unsafe-to-copy chunks really are", +" safe to copy across an IDAT size change. This is true of all chunks", +" that have ever been formally proposed as PNG extensions.", +" MESSAGES", +" By default the program only outputs summaries for each file.", +" --quiet (-q):", +" Do not output the summaries except for files that cannot be read. With", +" two --quiets these are not output either.", +" --errors (-e):", +" Output errors from libpng and the program (except too-far-back).", +" --warnings (-w):", +" Output warnings from libpng.", +" OUTPUT", +" By default nothing is written.", +" --out=:", +" Write the optimized/corrected version of the next PNG to . This", +" overrides the following two options", +" --suffix=:", +" Set --out= for all following files unless overridden on", +" a per-file basis by explicit --out.", +" --prefix=:", +" Set --out= for all the following files unless overridden", +" on a per-file basis by explicit --out.", +" These two options can be used together to produce a suffix and prefix.", +" INTERNAL OPTIONS", +#if 0 /*NYI*/ +#ifdef PNG_MAXIMUM_INFLATE_WINDOW +" --test:", +" Test the PNG_MAXIMUM_INFLATE_WINDOW option. Setting this disables", +" output as this would produce a broken file.", +#endif +#endif +0, +"EXIT CODES", +" *** SUBJECT TO CHANGE ***", +" The program exit code is value in the range 0..127 holding a bit mask of", +" the following codes. Notice that the results for each file are combined", +" together - check one file at a time to get a meaningful error code!", +" 0x01: The zlib too-far-back error existed in at least one chunk.", +" 0x02: At least one chunk had a CRC error.", +" 0x04: A chunk length was incorrect.", +" 0x08: The file was truncated.", +" Errors less than 16 are potentially recoverable, for a single file if the", +" exit code is less than 16 the file could be read (with corrections if a", +" non-zero code is returned).", +" 0x10: The file could not be read, even with corrections.", +" 0x20: The output file could not be written.", +" 0x40: An unexpected, potentially internal, error occurred.", +" If the command line arguments are incorrect the program exits with exit", +" 255. Some older operating systems only support 7-bit exit codes, on those", +" systems it is suggested that this program is first tested by supplying", +" invalid arguments.", +0, +"DESCRIPTION", +" " PROGRAM_NAME ":", +" checks each PNG file on the command line for errors. By default errors are", +" not output and the program just returns an exit code and prints a summary.", +" With the --quiet (-q) option the summaries are suppressed too and the", +" program only outputs unexpected errors (internal errors and file open", +" errors).", +" Various known problems in PNG files are fixed while the file is being read", +" The exit code says what problems were fixed. In particular the zlib error:", +0, +" \"invalid distance too far back\"", +0, +" caused by an incorrect optimization of a zlib stream is fixed in any", +" compressed chunk in which it is encountered. An integrity problem of the", +" PNG stream caused by a bug in libpng which wrote an incorrect chunk length", +" is also fixed. Chunk CRC errors are automatically fixed up.", +0, +" Setting one of the \"OUTPUT\" options causes the possibly modified file to", +" be written to a new file.", +0, +" Notice that some PNG files with the zlib optimization problem can still be", +" read by libpng under some circumstances. This program will still detect", +" and, if requested, correct the error.", +0, +" The program will reliably process all files on the command line unless", +" either an invalid argument causes the usage message (this message) to be", +" produced or the program crashes.", +0, +" The summary lines describe issues encountered with the zlib compressed", +" stream of a chunk. They have the following format, which is SUBJECT TO", +" CHANGE in the future:", +0, +" chunk reason comp-level p1 p2 p3 p4 file", +0, +" p1 through p4 vary according to the 'reason'. There are always 8 space", +" separated fields. Reasons specific formats are:", +0, +" chunk ERR status code read-errno write-errno message file", +" chunk SKP comp-level file-bits zlib-rc compressed message file", +" chunk ??? comp-level file-bits ok-bits compressed uncompress file", +0, +" The various fields are", +0, +"$1 chunk: The chunk type of a chunk in the file or 'HEAD' if a problem", +" is reported by libpng at the start of the IDAT stream.", +"$2 reason: One of:", +" CHK: A zlib header checksum was detected and fixed.", +" TFB: The zlib too far back error was detected and fixed.", +" OK : No errors were detected in the zlib stream and optimization", +" was not requested, or was not possible.", +" OPT: The zlib stream window bits value could be improved (and was).", +" SKP: The chunk was skipped because of a zlib issue (zlib-rc) with", +" explanation 'message'", +" ERR: The read of the file was aborted. The parameters explain why.", +"$3 status: For 'ERR' the accumulated status code from 'EXIT CODES' above.", +" This is printed as a 2 digit hexadecimal value", +" comp-level: The recorded compression level (FLEVEL) of a zlib stream", +" expressed as a string {supfast,stdfast,default,maximum}", +"$4 code: The file exit code; where stop was called, as a fairly terse", +" string {warning,libpng,zlib,invalid,read,write,unexpected}.", +" file-bits: The zlib window bits recorded in the file.", +"$5 read-errno: A system errno value from a read translated by strerror(3).", +" zlib-rc: A zlib return code as a string (see zlib.h).", +" ok-bits: The smallest zlib window bits value that works.", +"$6 write-errno:A system errno value from a write translated by strerror(3).", +" compressed: The count of compressed bytes in the zlib stream, when the", +" reason is 'SKP'; this is a count of the bytes read from the", +" stream when the fatal error was encountered.", +"$7 message: An error message (spaces replaced by _, as in all parameters),", +" uncompress: The count of bytes from uncompressing the zlib stream; this", +" may not be the same as the number of bytes in the image.", +"$8 file: The name of the file (this may contain spaces).", +}; + + fprintf(stderr, "Usage: %s {[options] png-file}\n", prog); + + for (i=0; i < (sizeof usage_string)/(sizeof usage_string[0]); ++i) + { + if (usage_string[i] != 0) + fputs(usage_string[i], stderr); + + fputc('\n', stderr); + } + + exit(255); +} + +int +main(int argc, const char **argv) +{ + char temp_name[FILENAME_MAX+1]; + const char * prog = *argv; + const char * outfile = NULL; + const char * suffix = NULL; + const char * prefix = NULL; + int done = 0; /* if at least one file is processed */ + struct global global; + + global_init(&global); + + while (--argc > 0) + { + ++argv; + + if (strcmp(*argv, "--debug") == 0) + { + /* To help debugging problems: */ + global.errors = global.warnings = 1; + global.quiet = 0; + global.verbose = 7; + } + + else if (strncmp(*argv, "--max=", 6) == 0) + { + global.idat_max = (png_uint_32)atol(6+*argv); + + if (global.skip < SKIP_UNSAFE) + global.skip = SKIP_UNSAFE; + } + + else if (strcmp(*argv, "--max") == 0) + { + global.idat_max = 0x7fffffff; + + if (global.skip < SKIP_UNSAFE) + global.skip = SKIP_UNSAFE; + } + + else if (strcmp(*argv, "--optimize") == 0 || strcmp(*argv, "-o") == 0) + global.optimize_zlib = 1; + + else if (strncmp(*argv, "--out=", 6) == 0) + outfile = 6+*argv; + + else if (strncmp(*argv, "--suffix=", 9) == 0) + suffix = 9+*argv; + + else if (strncmp(*argv, "--prefix=", 9) == 0) + prefix = 9+*argv; + + else if (strcmp(*argv, "--strip=none") == 0) + global.skip = SKIP_NONE; + + else if (strcmp(*argv, "--strip=crc") == 0) + global.skip = SKIP_BAD_CRC; + + else if (strcmp(*argv, "--strip=unsafe") == 0) + global.skip = SKIP_UNSAFE; + + else if (strcmp(*argv, "--strip=unused") == 0) + global.skip = SKIP_UNUSED; + + else if (strcmp(*argv, "--strip=transform") == 0) + global.skip = SKIP_TRANSFORM; + + else if (strcmp(*argv, "--strip=color") == 0) + global.skip = SKIP_COLOR; + + else if (strcmp(*argv, "--strip=all") == 0) + global.skip = SKIP_ALL; + + else if (strcmp(*argv, "--errors") == 0 || strcmp(*argv, "-e") == 0) + global.errors = 1; + + else if (strcmp(*argv, "--warnings") == 0 || strcmp(*argv, "-w") == 0) + global.warnings = 1; + + else if (strcmp(*argv, "--quiet") == 0 || strcmp(*argv, "-q") == 0) + { + if (global.quiet) + global.quiet = 2; + + else + global.quiet = 1; + } + + else if (strcmp(*argv, "--verbose") == 0 || strcmp(*argv, "-v") == 0) + ++global.verbose; + +#if 0 + /* NYI */ +# ifdef PNG_MAXIMUM_INFLATE_WINDOW + else if (strcmp(*argv, "--test") == 0) + ++set_option; +# endif +#endif + + else if ((*argv)[0] == '-') + usage(prog); + + else + { + size_t outlen = strlen(*argv); + + if (outfile == NULL) /* else this takes precedence */ + { + /* Consider the prefix/suffix options */ + if (prefix != NULL) + { + size_t prefixlen = strlen(prefix); + + if (prefixlen+outlen > FILENAME_MAX) + { + fprintf(stderr, "%s: output file name too long: %s%s%s\n", + prog, prefix, *argv, suffix ? suffix : ""); + global.status_code |= WRITE_ERROR; + continue; + } + + memcpy(temp_name, prefix, prefixlen); + memcpy(temp_name+prefixlen, *argv, outlen); + outlen += prefixlen; + outfile = temp_name; + } + + else if (suffix != NULL) + memcpy(temp_name, *argv, outlen); + + temp_name[outlen] = 0; + + if (suffix != NULL) + { + size_t suffixlen = strlen(suffix); + + if (outlen+suffixlen > FILENAME_MAX) + { + fprintf(stderr, "%s: output file name too long: %s%s\n", + prog, *argv, suffix); + global.status_code |= WRITE_ERROR; + continue; + } + + memcpy(temp_name+outlen, suffix, suffixlen); + outlen += suffixlen; + temp_name[outlen] = 0; + outfile = temp_name; + } + } + + (void)one_file(&global, *argv, outfile); + ++done; + outfile = NULL; + } + } + + if (!done) + usage(prog); + + return global_end(&global); +} + +#else /* ZLIB_VERNUM < 0x1240 */ +int +main(void) +{ + fprintf(stderr, + "pngfix needs libpng with a zlib >=1.2.4 (not 0x%x)\n", + ZLIB_VERNUM); + return 77; +} +#endif /* ZLIB_VERNUM */ + +#else /* No read support */ + +int +main(void) +{ + fprintf(stderr, "pngfix does not work without read deinterlace support\n"); + return 77; +} +#endif /* PNG_READ_SUPPORTED && PNG_EASY_ACCESS_SUPPORTED */ +#else /* No setjmp support */ +int +main(void) +{ + fprintf(stderr, "pngfix does not work without setjmp support\n"); + return 77; +} +#endif /* PNG_SETJMP_SUPPORTED */ + diff --git a/extern/libpng/contrib/tools/reindent b/extern/libpng/contrib/tools/reindent new file mode 100755 index 0000000000..f4df309b66 --- /dev/null +++ b/extern/libpng/contrib/tools/reindent @@ -0,0 +1,25 @@ +#!/bin/sh + +# reindent a libpng C source + +# COPYRIGHT: Written by Glenn Randers-Pehrson, 2016. +# To the extent possible under law, the author has waived all copyright and +# related or neighboring rights to this work. This work is published from: +# United States. + +# Usage: +# reindent inputtabsize outputtabsize inputcontinuestring outputcontinuestring +# +# Assumes that continued lines begin with indentation plus one space, and +# that continued comments begin with indentation plus " *". +# +# eg, to change libpng coding style from 3-space indentation with 4-space +# continuations to 4-space indentation with 2-space continuations: +# +# reindent 3 4 "\t " " " < example.c > example.c_4_2 +# and to restore the file back to libpng coding style +# reindent 4 3 " " " " < example.c_4_2 > example.c_3_4 + +unexpand --first-only --t $1 | \ + sed -e "/^ *$3[^\*]/{s/$3/$4/}" | \ + expand -t $2 diff --git a/extern/libpng/contrib/tools/sRGB.h b/extern/libpng/contrib/tools/sRGB.h new file mode 100644 index 0000000000..d1ece51291 --- /dev/null +++ b/extern/libpng/contrib/tools/sRGB.h @@ -0,0 +1,48 @@ +/*- + * sRGB.h + * + * Last changed in libpng 1.6.0 [February 14, 2013] + * + * COPYRIGHT: Written by John Cunningham Bowler, 2013. + * To the extent possible under law, the author has waived all copyright and + * related or neighboring rights to this work. This work is published from: + * United States. + * + * Utility file; not actually a header, this contains definitions of sRGB + * calculation functions for inclusion in those test programs that need them. + * + * All routines take and return a floating point value in the range + * 0 to 1.0, doing a calculation according to the sRGB specification + * (in fact the source of the numbers is the wikipedia article at + * https://en.wikipedia.org/wiki/SRGB). + */ +static double +sRGB_from_linear(double l) +{ + if (l <= 0.0031308) + l *= 12.92; + + else + l = 1.055 * pow(l, 1/2.4) - 0.055; + + return l; +} + +static double +linear_from_sRGB(double s) +{ + if (s <= 0.04045) + return s / 12.92; + + else + return pow((s+0.055)/1.055, 2.4); +} + +static double +YfromRGB(double r, double g, double b) +{ + /* Use the sRGB (rounded) coefficients for Rlinear, Glinear, Blinear to get + * the CIE Y value (also linear). + */ + return 0.2126 * r + 0.7152 * g + 0.0722 * b; +} diff --git a/extern/libpng/include/contrib/visupng/PngFile.c b/extern/libpng/contrib/visupng/PngFile.c similarity index 96% rename from extern/libpng/include/contrib/visupng/PngFile.c rename to extern/libpng/contrib/visupng/PngFile.c index ef0984e4df..cf943f32a6 100644 --- a/extern/libpng/include/contrib/visupng/PngFile.c +++ b/extern/libpng/contrib/visupng/PngFile.c @@ -2,7 +2,7 @@ * PNGFILE.C -- Image File Functions *------------------------------------- * - * Copyright 2000, Willem van Schaik. + * Copyright 2000,2017 Willem van Schaik. * * This code is released under the libpng license. * For conditions of distribution and use, see the disclaimer @@ -13,6 +13,7 @@ #include #include #include +#include #include "png.h" #include "pngfile.h" @@ -235,6 +236,10 @@ BOOL PngLoadImage (PTSTR pstrFileName, png_byte **ppbImageData, free (pbImageData); pbImageData = NULL; } + if ((*piHeight) > ((size_t)(-1))/ulRowBytes) { + { + png_error(png_ptr, "Visual PNG: image is too big"); + } if ((pbImageData = (png_byte *) malloc(ulRowBytes * (*piHeight) * sizeof(png_byte))) == NULL) { @@ -405,15 +410,14 @@ BOOL PngSaveImage (PTSTR pstrFileName, png_byte *pDiData, #ifndef PNG_STDIO_SUPPORTED static void -png_read_data(png_structp png_ptr, png_bytep data, png_size_t length) +png_read_data(png_structp png_ptr, png_bytep data, size_t length) { - png_size_t check; + size_t check; - /* fread() returns 0 on error, so it is OK to store this in a png_size_t + /* fread() returns 0 on error, so it is OK to store this in a size_t * instead of an int, which is what fread() actually returns. */ - check = (png_size_t)fread(data, (png_size_t)1, length, - (FILE *)png_ptr->io_ptr); + check = fread(data, 1, length, (FILE *)png_ptr->io_ptr); if (check != length) { @@ -422,7 +426,7 @@ png_read_data(png_structp png_ptr, png_bytep data, png_size_t length) } static void -png_write_data(png_structp png_ptr, png_bytep data, png_size_t length) +png_write_data(png_structp png_ptr, png_bytep data, size_t length) { png_uint_32 check; diff --git a/extern/libpng/include/contrib/visupng/PngFile.h b/extern/libpng/contrib/visupng/PngFile.h similarity index 84% rename from extern/libpng/include/contrib/visupng/PngFile.h rename to extern/libpng/contrib/visupng/PngFile.h index 32181a4eac..1b7b9be3c3 100644 --- a/extern/libpng/include/contrib/visupng/PngFile.h +++ b/extern/libpng/contrib/visupng/PngFile.h @@ -17,14 +17,14 @@ void PngFileInitialize (HWND hwnd) ; BOOL PngFileOpenDlg (HWND hwnd, PTSTR pstrFileName, PTSTR pstrTitleName) ; BOOL PngFileSaveDlg (HWND hwnd, PTSTR pstrFileName, PTSTR pstrTitleName) ; -BOOL PngLoadImage (PTSTR pstrFileName, png_byte **ppbImageData, +BOOL PngLoadImage (PTSTR pstrFileName, png_byte **ppbImageData, int *piWidth, int *piHeight, int *piChannels, png_color *pBkgColor); BOOL PngSaveImage (PTSTR pstrFileName, png_byte *pDiData, int iWidth, int iHeight, png_color BkgColor); #ifndef PNG_STDIO_SUPPORTED -static void png_read_data(png_structp png_ptr, png_bytep data, png_size_t length); -static void png_write_data(png_structp png_ptr, png_bytep data, png_size_t length); +static void png_read_data(png_structp png_ptr, png_bytep data, size_t length); +static void png_write_data(png_structp png_ptr, png_bytep data, size_t length); static void png_flush(png_structp png_ptr); #endif diff --git a/extern/libpng/include/contrib/visupng/README.txt b/extern/libpng/contrib/visupng/README.txt similarity index 100% rename from extern/libpng/include/contrib/visupng/README.txt rename to extern/libpng/contrib/visupng/README.txt diff --git a/extern/libpng/include/contrib/visupng/VisualPng.c b/extern/libpng/contrib/visupng/VisualPng.c similarity index 98% rename from extern/libpng/include/contrib/visupng/VisualPng.c rename to extern/libpng/contrib/visupng/VisualPng.c index 009f120e35..6baa3b6630 100644 --- a/extern/libpng/include/contrib/visupng/VisualPng.c +++ b/extern/libpng/contrib/visupng/VisualPng.c @@ -2,7 +2,7 @@ * VisualPng.C -- Shows a PNG image *------------------------------------ * - * Copyright 2000, Willem van Schaik. + * Copyright 2000,2017 Willem van Schaik. * * This code is released under the libpng license. * For conditions of distribution and use, see the disclaimer @@ -27,6 +27,7 @@ #include #include #include +#include /* application includes */ @@ -715,7 +716,7 @@ BOOL DisplayImage (HWND hwnd, BYTE **ppDib, png_color bkgGray = {127, 127, 127}; png_color bkgWhite = {255, 255, 255}; - /* allocate memory for the Device Independant bitmap */ + /* allocate memory for the Device Independent bitmap */ wDIRowBytes = (WORD) ((3 * cxWinSize + 3L) >> 2) << 2; @@ -725,6 +726,10 @@ BOOL DisplayImage (HWND hwnd, BYTE **ppDib, pDib = NULL; } + if (cyWinSize > ((size_t)(-1))/wDIRowBytes) { + { + MessageBox (hwnd, TEXT ("Visual PNG: image is too big"); + } if (!(pDib = (BYTE *) malloc (sizeof(BITMAPINFOHEADER) + wDIRowBytes * cyWinSize))) { @@ -846,6 +851,10 @@ BOOL FillBitmap ( cxImgPos = (cxWinSize - cxNewSize) / 2; } + if (cyNewSize > ((size_t)(-1))/(cImgChannels * cxNewSize)) { + { + MessageBox (hwnd, TEXT ("Visual PNG: stretched image is too big"); + } pStretchedImage = malloc (cImgChannels * cxNewSize * cyNewSize); pImg = pStretchedImage; diff --git a/extern/libpng/include/contrib/visupng/VisualPng.dsp b/extern/libpng/contrib/visupng/VisualPng.dsp similarity index 100% rename from extern/libpng/include/contrib/visupng/VisualPng.dsp rename to extern/libpng/contrib/visupng/VisualPng.dsp diff --git a/extern/libpng/include/contrib/visupng/VisualPng.dsw b/extern/libpng/contrib/visupng/VisualPng.dsw similarity index 100% rename from extern/libpng/include/contrib/visupng/VisualPng.dsw rename to extern/libpng/contrib/visupng/VisualPng.dsw diff --git a/extern/libpng/include/contrib/visupng/VisualPng.ico b/extern/libpng/contrib/visupng/VisualPng.ico similarity index 100% rename from extern/libpng/include/contrib/visupng/VisualPng.ico rename to extern/libpng/contrib/visupng/VisualPng.ico diff --git a/extern/libpng/include/contrib/visupng/VisualPng.png b/extern/libpng/contrib/visupng/VisualPng.png similarity index 100% rename from extern/libpng/include/contrib/visupng/VisualPng.png rename to extern/libpng/contrib/visupng/VisualPng.png diff --git a/extern/libpng/include/contrib/visupng/VisualPng.rc b/extern/libpng/contrib/visupng/VisualPng.rc similarity index 100% rename from extern/libpng/include/contrib/visupng/VisualPng.rc rename to extern/libpng/contrib/visupng/VisualPng.rc diff --git a/extern/libpng/include/contrib/visupng/cexcept.h b/extern/libpng/contrib/visupng/cexcept.h similarity index 100% rename from extern/libpng/include/contrib/visupng/cexcept.h rename to extern/libpng/contrib/visupng/cexcept.h diff --git a/extern/libpng/include/contrib/visupng/resource.h b/extern/libpng/contrib/visupng/resource.h similarity index 100% rename from extern/libpng/include/contrib/visupng/resource.h rename to extern/libpng/contrib/visupng/resource.h diff --git a/extern/libpng/include/depcomp b/extern/libpng/depcomp similarity index 55% rename from extern/libpng/include/depcomp rename to extern/libpng/depcomp index bd0ac08958..65cbf7093a 100755 --- a/extern/libpng/include/depcomp +++ b/extern/libpng/depcomp @@ -1,10 +1,9 @@ #! /bin/sh # depcomp - compile a program generating dependencies as side-effects -scriptversion=2011-12-04.11; # UTC +scriptversion=2018-03-07.03; # UTC -# Copyright (C) 1999, 2000, 2003, 2004, 2005, 2006, 2007, 2009, 2010, -# 2011 Free Software Foundation, Inc. +# Copyright (C) 1999-2018 Free Software Foundation, Inc. # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by @@ -17,7 +16,7 @@ scriptversion=2011-12-04.11; # UTC # GNU General Public License for more details. # You should have received a copy of the GNU General Public License -# along with this program. If not, see . +# along with this program. If not, see . # As a special exception to the GNU General Public License, if you # distribute this file as part of a program that contains a @@ -28,9 +27,9 @@ scriptversion=2011-12-04.11; # UTC case $1 in '') - echo "$0: No command. Try \`$0 --help' for more information." 1>&2 - exit 1; - ;; + echo "$0: No command. Try '$0 --help' for more information." 1>&2 + exit 1; + ;; -h | --h*) cat <<\EOF Usage: depcomp [--help] [--version] PROGRAM [ARGS] @@ -40,8 +39,8 @@ as side-effects. Environment variables: depmode Dependency tracking mode. - source Source file read by `PROGRAMS ARGS'. - object Object file output by `PROGRAMS ARGS'. + source Source file read by 'PROGRAMS ARGS'. + object Object file output by 'PROGRAMS ARGS'. DEPDIR directory where to store dependencies. depfile Dependency file to output. tmpdepfile Temporary file to use when outputting dependencies. @@ -57,6 +56,66 @@ EOF ;; esac +# Get the directory component of the given path, and save it in the +# global variables '$dir'. Note that this directory component will +# be either empty or ending with a '/' character. This is deliberate. +set_dir_from () +{ + case $1 in + */*) dir=`echo "$1" | sed -e 's|/[^/]*$|/|'`;; + *) dir=;; + esac +} + +# Get the suffix-stripped basename of the given path, and save it the +# global variable '$base'. +set_base_from () +{ + base=`echo "$1" | sed -e 's|^.*/||' -e 's/\.[^.]*$//'` +} + +# If no dependency file was actually created by the compiler invocation, +# we still have to create a dummy depfile, to avoid errors with the +# Makefile "include basename.Plo" scheme. +make_dummy_depfile () +{ + echo "#dummy" > "$depfile" +} + +# Factor out some common post-processing of the generated depfile. +# Requires the auxiliary global variable '$tmpdepfile' to be set. +aix_post_process_depfile () +{ + # If the compiler actually managed to produce a dependency file, + # post-process it. + if test -f "$tmpdepfile"; then + # Each line is of the form 'foo.o: dependency.h'. + # Do two passes, one to just change these to + # $object: dependency.h + # and one to simply output + # dependency.h: + # which is needed to avoid the deleted-header problem. + { sed -e "s,^.*\.[$lower]*:,$object:," < "$tmpdepfile" + sed -e "s,^.*\.[$lower]*:[$tab ]*,," -e 's,$,:,' < "$tmpdepfile" + } > "$depfile" + rm -f "$tmpdepfile" + else + make_dummy_depfile + fi +} + +# A tabulation character. +tab=' ' +# A newline character. +nl=' +' +# Character ranges might be problematic outside the C locale. +# These definitions help. +upper=ABCDEFGHIJKLMNOPQRSTUVWXYZ +lower=abcdefghijklmnopqrstuvwxyz +digits=0123456789 +alpha=${upper}${lower} + if test -z "$depmode" || test -z "$source" || test -z "$object"; then echo "depcomp: Variables source, object and depmode must be set" 1>&2 exit 1 @@ -69,6 +128,9 @@ tmpdepfile=${tmpdepfile-`echo "$depfile" | sed 's/\.\([^.]*\)$/.T\1/'`} rm -f "$tmpdepfile" +# Avoid interferences from the environment. +gccflag= dashmflag= + # Some modes work just like other modes, but use different flags. We # parameterize here, but still list the modes in the big case below, # to make depend.m4 easier to write. Note that we *cannot* use a case @@ -80,26 +142,32 @@ if test "$depmode" = hp; then fi if test "$depmode" = dashXmstdout; then - # This is just like dashmstdout with a different argument. - dashmflag=-xM - depmode=dashmstdout + # This is just like dashmstdout with a different argument. + dashmflag=-xM + depmode=dashmstdout fi cygpath_u="cygpath -u -f -" if test "$depmode" = msvcmsys; then - # This is just like msvisualcpp but w/o cygpath translation. - # Just convert the backslash-escaped backslashes to single forward - # slashes to satisfy depend.m4 - cygpath_u='sed s,\\\\,/,g' - depmode=msvisualcpp + # This is just like msvisualcpp but w/o cygpath translation. + # Just convert the backslash-escaped backslashes to single forward + # slashes to satisfy depend.m4 + cygpath_u='sed s,\\\\,/,g' + depmode=msvisualcpp fi if test "$depmode" = msvc7msys; then - # This is just like msvc7 but w/o cygpath translation. - # Just convert the backslash-escaped backslashes to single forward - # slashes to satisfy depend.m4 - cygpath_u='sed s,\\\\,/,g' - depmode=msvc7 + # This is just like msvc7 but w/o cygpath translation. + # Just convert the backslash-escaped backslashes to single forward + # slashes to satisfy depend.m4 + cygpath_u='sed s,\\\\,/,g' + depmode=msvc7 +fi + +if test "$depmode" = xlc; then + # IBM C/C++ Compilers xlc/xlC can output gcc-like dependency information. + gccflag=-qmakedep=gcc,-MF + depmode=gcc fi case "$depmode" in @@ -122,8 +190,7 @@ gcc3) done "$@" stat=$? - if test $stat -eq 0; then : - else + if test $stat -ne 0; then rm -f "$tmpdepfile" exit $stat fi @@ -131,13 +198,17 @@ gcc3) ;; gcc) +## Note that this doesn't just cater to obsosete pre-3.x GCC compilers. +## but also to in-use compilers like IMB xlc/xlC and the HP C compiler. +## (see the conditional assignment to $gccflag above). ## There are various ways to get dependency output from gcc. Here's ## why we pick this rather obscure method: ## - Don't want to use -MD because we'd like the dependencies to end ## up in a subdir. Having to rename by hand is ugly. ## (We might end up doing this anyway to support other compilers.) ## - The DEPENDENCIES_OUTPUT environment variable makes gcc act like -## -MM, not -M (despite what the docs say). +## -MM, not -M (despite what the docs say). Also, it might not be +## supported by the other compilers which use the 'gcc' depmode. ## - Using -M directly means running the compiler twice (even worse ## than renaming). if test -z "$gccflag"; then @@ -145,33 +216,31 @@ gcc) fi "$@" -Wp,"$gccflag$tmpdepfile" stat=$? - if test $stat -eq 0; then : - else + if test $stat -ne 0; then rm -f "$tmpdepfile" exit $stat fi rm -f "$depfile" echo "$object : \\" > "$depfile" - alpha=ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz -## The second -e expression handles DOS-style file names with drive letters. + # The second -e expression handles DOS-style file names with drive + # letters. sed -e 's/^[^:]*: / /' \ -e 's/^['$alpha']:\/[^:]*: / /' < "$tmpdepfile" >> "$depfile" -## This next piece of magic avoids the `deleted header file' problem. +## This next piece of magic avoids the "deleted header file" problem. ## The problem is that when a header file which appears in a .P file ## is deleted, the dependency causes make to die (because there is ## typically no way to rebuild the header). We avoid this by adding ## dummy dependencies for each header file. Too bad gcc doesn't do ## this for us directly. - tr ' ' ' -' < "$tmpdepfile" | -## Some versions of gcc put a space before the `:'. On the theory +## Some versions of gcc put a space before the ':'. On the theory ## that the space means something, we add a space to the output as ## well. hp depmode also adds that space, but also prefixes the VPATH ## to the object. Take care to not repeat it in the output. ## Some versions of the HPUX 10.20 sed can't process this invocation ## correctly. Breaking it into two sed invocations is a workaround. - sed -e 's/^\\$//' -e '/^$/d' -e "s|.*$object$||" -e '/:$/d' \ - | sed -e 's/$/ :/' >> "$depfile" + tr ' ' "$nl" < "$tmpdepfile" \ + | sed -e 's/^\\$//' -e '/^$/d' -e "s|.*$object$||" -e '/:$/d' \ + | sed -e 's/$/ :/' >> "$depfile" rm -f "$tmpdepfile" ;; @@ -189,8 +258,7 @@ sgi) "$@" -MDupdate "$tmpdepfile" fi stat=$? - if test $stat -eq 0; then : - else + if test $stat -ne 0; then rm -f "$tmpdepfile" exit $stat fi @@ -198,43 +266,41 @@ sgi) if test -f "$tmpdepfile"; then # yes, the sourcefile depend on other files echo "$object : \\" > "$depfile" - # Clip off the initial element (the dependent). Don't try to be # clever and replace this with sed code, as IRIX sed won't handle # lines with more than a fixed number of characters (4096 in # IRIX 6.2 sed, 8192 in IRIX 6.5). We also remove comment lines; - # the IRIX cc adds comments like `#:fec' to the end of the + # the IRIX cc adds comments like '#:fec' to the end of the # dependency line. - tr ' ' ' -' < "$tmpdepfile" \ - | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' | \ - tr ' -' ' ' >> "$depfile" + tr ' ' "$nl" < "$tmpdepfile" \ + | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' \ + | tr "$nl" ' ' >> "$depfile" echo >> "$depfile" - # The second pass generates a dummy entry for each header file. - tr ' ' ' -' < "$tmpdepfile" \ - | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' -e 's/$/:/' \ - >> "$depfile" + tr ' ' "$nl" < "$tmpdepfile" \ + | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' -e 's/$/:/' \ + >> "$depfile" else - # The sourcefile does not contain any dependencies, so just - # store a dummy comment line, to avoid errors with the Makefile - # "include basename.Plo" scheme. - echo "#dummy" > "$depfile" + make_dummy_depfile fi rm -f "$tmpdepfile" ;; +xlc) + # This case exists only to let depend.m4 do its work. It works by + # looking at the text of this script. This case will never be run, + # since it is checked for above. + exit 1 + ;; + aix) # The C for AIX Compiler uses -M and outputs the dependencies # in a .u file. In older versions, this file always lives in the - # current directory. Also, the AIX compiler puts `$object:' at the + # current directory. Also, the AIX compiler puts '$object:' at the # start of each line; $object doesn't have directory information. # Version 6 uses the directory in both cases. - dir=`echo "$object" | sed -e 's|/[^/]*$|/|'` - test "x$dir" = "x$object" && dir= - base=`echo "$object" | sed -e 's|^.*/||' -e 's/\.o$//' -e 's/\.lo$//'` + set_dir_from "$object" + set_base_from "$object" if test "$libtool" = yes; then tmpdepfile1=$dir$base.u tmpdepfile2=$base.u @@ -247,9 +313,7 @@ aix) "$@" -M fi stat=$? - - if test $stat -eq 0; then : - else + if test $stat -ne 0; then rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3" exit $stat fi @@ -258,44 +322,100 @@ aix) do test -f "$tmpdepfile" && break done - if test -f "$tmpdepfile"; then - # Each line is of the form `foo.o: dependent.h'. - # Do two passes, one to just change these to - # `$object: dependent.h' and one to simply `dependent.h:'. - sed -e "s,^.*\.[a-z]*:,$object:," < "$tmpdepfile" > "$depfile" - # That's a tab and a space in the []. - sed -e 's,^.*\.[a-z]*:[ ]*,,' -e 's,$,:,' < "$tmpdepfile" >> "$depfile" - else - # The sourcefile does not contain any dependencies, so just - # store a dummy comment line, to avoid errors with the Makefile - # "include basename.Plo" scheme. - echo "#dummy" > "$depfile" + aix_post_process_depfile + ;; + +tcc) + # tcc (Tiny C Compiler) understand '-MD -MF file' since version 0.9.26 + # FIXME: That version still under development at the moment of writing. + # Make that this statement remains true also for stable, released + # versions. + # It will wrap lines (doesn't matter whether long or short) with a + # trailing '\', as in: + # + # foo.o : \ + # foo.c \ + # foo.h \ + # + # It will put a trailing '\' even on the last line, and will use leading + # spaces rather than leading tabs (at least since its commit 0394caf7 + # "Emit spaces for -MD"). + "$@" -MD -MF "$tmpdepfile" + stat=$? + if test $stat -ne 0; then + rm -f "$tmpdepfile" + exit $stat fi + rm -f "$depfile" + # Each non-empty line is of the form 'foo.o : \' or ' dep.h \'. + # We have to change lines of the first kind to '$object: \'. + sed -e "s|.*:|$object :|" < "$tmpdepfile" > "$depfile" + # And for each line of the second kind, we have to emit a 'dep.h:' + # dummy dependency, to avoid the deleted-header problem. + sed -n -e 's|^ *\(.*\) *\\$|\1:|p' < "$tmpdepfile" >> "$depfile" rm -f "$tmpdepfile" ;; -icc) - # Intel's C compiler understands `-MD -MF file'. However on - # icc -MD -MF foo.d -c -o sub/foo.o sub/foo.c - # ICC 7.0 will fill foo.d with something like - # foo.o: sub/foo.c - # foo.o: sub/foo.h - # which is wrong. We want: - # sub/foo.o: sub/foo.c - # sub/foo.o: sub/foo.h - # sub/foo.c: - # sub/foo.h: - # ICC 7.1 will output +## The order of this option in the case statement is important, since the +## shell code in configure will try each of these formats in the order +## listed in this file. A plain '-MD' option would be understood by many +## compilers, so we must ensure this comes after the gcc and icc options. +pgcc) + # Portland's C compiler understands '-MD'. + # Will always output deps to 'file.d' where file is the root name of the + # source file under compilation, even if file resides in a subdirectory. + # The object file name does not affect the name of the '.d' file. + # pgcc 10.2 will output # foo.o: sub/foo.c sub/foo.h - # and will wrap long lines using \ : + # and will wrap long lines using '\' : # foo.o: sub/foo.c ... \ # sub/foo.h ... \ # ... + set_dir_from "$object" + # Use the source, not the object, to determine the base name, since + # that's sadly what pgcc will do too. + set_base_from "$source" + tmpdepfile=$base.d - "$@" -MD -MF "$tmpdepfile" - stat=$? - if test $stat -eq 0; then : - else + # For projects that build the same source file twice into different object + # files, the pgcc approach of using the *source* file root name can cause + # problems in parallel builds. Use a locking strategy to avoid stomping on + # the same $tmpdepfile. + lockdir=$base.d-lock + trap " + echo '$0: caught signal, cleaning up...' >&2 + rmdir '$lockdir' + exit 1 + " 1 2 13 15 + numtries=100 + i=$numtries + while test $i -gt 0; do + # mkdir is a portable test-and-set. + if mkdir "$lockdir" 2>/dev/null; then + # This process acquired the lock. + "$@" -MD + stat=$? + # Release the lock. + rmdir "$lockdir" + break + else + # If the lock is being held by a different process, wait + # until the winning process is done or we timeout. + while test -d "$lockdir" && test $i -gt 0; do + sleep 1 + i=`expr $i - 1` + done + fi + i=`expr $i - 1` + done + trap - 1 2 13 15 + if test $i -le 0; then + echo "$0: failed to acquire lock after $numtries attempts" >&2 + echo "$0: check lockdir '$lockdir'" >&2 + exit 1 + fi + + if test $stat -ne 0; then rm -f "$tmpdepfile" exit $stat fi @@ -307,8 +427,8 @@ icc) sed "s,^[^:]*:,$object :," < "$tmpdepfile" > "$depfile" # Some versions of the HPUX 10.20 sed can't process this invocation # correctly. Breaking it into two sed invocations is a workaround. - sed 's,^[^:]*: \(.*\)$,\1,;s/^\\$//;/^$/d;/:$/d' < "$tmpdepfile" | - sed -e 's/$/ :/' >> "$depfile" + sed 's,^[^:]*: \(.*\)$,\1,;s/^\\$//;/^$/d;/:$/d' < "$tmpdepfile" \ + | sed -e 's/$/ :/' >> "$depfile" rm -f "$tmpdepfile" ;; @@ -319,9 +439,8 @@ hp2) # 'foo.d', which lands next to the object file, wherever that # happens to be. # Much of this is similar to the tru64 case; see comments there. - dir=`echo "$object" | sed -e 's|/[^/]*$|/|'` - test "x$dir" = "x$object" && dir= - base=`echo "$object" | sed -e 's|^.*/||' -e 's/\.o$//' -e 's/\.lo$//'` + set_dir_from "$object" + set_base_from "$object" if test "$libtool" = yes; then tmpdepfile1=$dir$base.d tmpdepfile2=$dir.libs/$base.d @@ -332,8 +451,7 @@ hp2) "$@" +Maked fi stat=$? - if test $stat -eq 0; then : - else + if test $stat -ne 0; then rm -f "$tmpdepfile1" "$tmpdepfile2" exit $stat fi @@ -343,77 +461,61 @@ hp2) test -f "$tmpdepfile" && break done if test -f "$tmpdepfile"; then - sed -e "s,^.*\.[a-z]*:,$object:," "$tmpdepfile" > "$depfile" - # Add `dependent.h:' lines. + sed -e "s,^.*\.[$lower]*:,$object:," "$tmpdepfile" > "$depfile" + # Add 'dependent.h:' lines. sed -ne '2,${ - s/^ *// - s/ \\*$// - s/$/:/ - p - }' "$tmpdepfile" >> "$depfile" + s/^ *// + s/ \\*$// + s/$/:/ + p + }' "$tmpdepfile" >> "$depfile" else - echo "#dummy" > "$depfile" + make_dummy_depfile fi rm -f "$tmpdepfile" "$tmpdepfile2" ;; tru64) - # The Tru64 compiler uses -MD to generate dependencies as a side - # effect. `cc -MD -o foo.o ...' puts the dependencies into `foo.o.d'. - # At least on Alpha/Redhat 6.1, Compaq CCC V6.2-504 seems to put - # dependencies in `foo.d' instead, so we check for that too. - # Subdirectories are respected. - dir=`echo "$object" | sed -e 's|/[^/]*$|/|'` - test "x$dir" = "x$object" && dir= - base=`echo "$object" | sed -e 's|^.*/||' -e 's/\.o$//' -e 's/\.lo$//'` + # The Tru64 compiler uses -MD to generate dependencies as a side + # effect. 'cc -MD -o foo.o ...' puts the dependencies into 'foo.o.d'. + # At least on Alpha/Redhat 6.1, Compaq CCC V6.2-504 seems to put + # dependencies in 'foo.d' instead, so we check for that too. + # Subdirectories are respected. + set_dir_from "$object" + set_base_from "$object" - if test "$libtool" = yes; then - # With Tru64 cc, shared objects can also be used to make a - # static library. This mechanism is used in libtool 1.4 series to - # handle both shared and static libraries in a single compilation. - # With libtool 1.4, dependencies were output in $dir.libs/$base.lo.d. - # - # With libtool 1.5 this exception was removed, and libtool now - # generates 2 separate objects for the 2 libraries. These two - # compilations output dependencies in $dir.libs/$base.o.d and - # in $dir$base.o.d. We have to check for both files, because - # one of the two compilations can be disabled. We should prefer - # $dir$base.o.d over $dir.libs/$base.o.d because the latter is - # automatically cleaned when .libs/ is deleted, while ignoring - # the former would cause a distcleancheck panic. - tmpdepfile1=$dir.libs/$base.lo.d # libtool 1.4 - tmpdepfile2=$dir$base.o.d # libtool 1.5 - tmpdepfile3=$dir.libs/$base.o.d # libtool 1.5 - tmpdepfile4=$dir.libs/$base.d # Compaq CCC V6.2-504 - "$@" -Wc,-MD - else - tmpdepfile1=$dir$base.o.d - tmpdepfile2=$dir$base.d - tmpdepfile3=$dir$base.d - tmpdepfile4=$dir$base.d - "$@" -MD - fi + if test "$libtool" = yes; then + # Libtool generates 2 separate objects for the 2 libraries. These + # two compilations output dependencies in $dir.libs/$base.o.d and + # in $dir$base.o.d. We have to check for both files, because + # one of the two compilations can be disabled. We should prefer + # $dir$base.o.d over $dir.libs/$base.o.d because the latter is + # automatically cleaned when .libs/ is deleted, while ignoring + # the former would cause a distcleancheck panic. + tmpdepfile1=$dir$base.o.d # libtool 1.5 + tmpdepfile2=$dir.libs/$base.o.d # Likewise. + tmpdepfile3=$dir.libs/$base.d # Compaq CCC V6.2-504 + "$@" -Wc,-MD + else + tmpdepfile1=$dir$base.d + tmpdepfile2=$dir$base.d + tmpdepfile3=$dir$base.d + "$@" -MD + fi - stat=$? - if test $stat -eq 0; then : - else - rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3" "$tmpdepfile4" - exit $stat - fi + stat=$? + if test $stat -ne 0; then + rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3" + exit $stat + fi - for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3" "$tmpdepfile4" - do - test -f "$tmpdepfile" && break - done - if test -f "$tmpdepfile"; then - sed -e "s,^.*\.[a-z]*:,$object:," < "$tmpdepfile" > "$depfile" - # That's a tab and a space in the []. - sed -e 's,^.*\.[a-z]*:[ ]*,,' -e 's,$,:,' < "$tmpdepfile" >> "$depfile" - else - echo "#dummy" > "$depfile" - fi - rm -f "$tmpdepfile" - ;; + for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3" + do + test -f "$tmpdepfile" && break + done + # Same post-processing that is required for AIX mode. + aix_post_process_depfile + ;; msvc7) if test "$libtool" = yes; then @@ -424,8 +526,7 @@ msvc7) "$@" $showIncludes > "$tmpdepfile" stat=$? grep -v '^Note: including file: ' "$tmpdepfile" - if test "$stat" = 0; then : - else + if test $stat -ne 0; then rm -f "$tmpdepfile" exit $stat fi @@ -443,14 +544,15 @@ msvc7) p }' | $cygpath_u | sort -u | sed -n ' s/ /\\ /g -s/\(.*\)/ \1 \\/p +s/\(.*\)/'"$tab"'\1 \\/p s/.\(.*\) \\/\1:/ H $ { - s/.*/ / + s/.*/'"$tab"'/ G p }' >> "$depfile" + echo >> "$depfile" # make sure the fragment doesn't end with a backslash rm -f "$tmpdepfile" ;; @@ -478,7 +580,7 @@ dashmstdout) shift fi - # Remove `-o $object'. + # Remove '-o $object'. IFS=" " for arg do @@ -498,18 +600,18 @@ dashmstdout) done test -z "$dashmflag" && dashmflag=-M - # Require at least two characters before searching for `:' + # Require at least two characters before searching for ':' # in the target name. This is to cope with DOS-style filenames: - # a dependency such as `c:/foo/bar' could be seen as target `c' otherwise. + # a dependency such as 'c:/foo/bar' could be seen as target 'c' otherwise. "$@" $dashmflag | - sed 's:^[ ]*[^: ][^:][^:]*\:[ ]*:'"$object"'\: :' > "$tmpdepfile" + sed "s|^[$tab ]*[^:$tab ][^:][^:]*:[$tab ]*|$object: |" > "$tmpdepfile" rm -f "$depfile" cat < "$tmpdepfile" > "$depfile" - tr ' ' ' -' < "$tmpdepfile" | \ -## Some versions of the HPUX 10.20 sed can't process this invocation -## correctly. Breaking it into two sed invocations is a workaround. - sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' | sed -e 's/$/ :/' >> "$depfile" + # Some versions of the HPUX 10.20 sed can't process this sed invocation + # correctly. Breaking it into two sed invocations is a workaround. + tr ' ' "$nl" < "$tmpdepfile" \ + | sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' \ + | sed -e 's/$/ :/' >> "$depfile" rm -f "$tmpdepfile" ;; @@ -562,11 +664,12 @@ makedepend) # makedepend may prepend the VPATH from the source file name to the object. # No need to regex-escape $object, excess matching of '.' is harmless. sed "s|^.*\($object *:\)|\1|" "$tmpdepfile" > "$depfile" - sed '1,2d' "$tmpdepfile" | tr ' ' ' -' | \ -## Some versions of the HPUX 10.20 sed can't process this invocation -## correctly. Breaking it into two sed invocations is a workaround. - sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' | sed -e 's/$/ :/' >> "$depfile" + # Some versions of the HPUX 10.20 sed can't process the last invocation + # correctly. Breaking it into two sed invocations is a workaround. + sed '1,2d' "$tmpdepfile" \ + | tr ' ' "$nl" \ + | sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' \ + | sed -e 's/$/ :/' >> "$depfile" rm -f "$tmpdepfile" "$tmpdepfile".bak ;; @@ -583,7 +686,7 @@ cpp) shift fi - # Remove `-o $object'. + # Remove '-o $object'. IFS=" " for arg do @@ -602,10 +705,10 @@ cpp) esac done - "$@" -E | - sed -n -e '/^# [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' \ - -e '/^#line [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' | - sed '$ s: \\$::' > "$tmpdepfile" + "$@" -E \ + | sed -n -e '/^# [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' \ + -e '/^#line [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' \ + | sed '$ s: \\$::' > "$tmpdepfile" rm -f "$depfile" echo "$object : \\" > "$depfile" cat < "$tmpdepfile" >> "$depfile" @@ -637,23 +740,23 @@ msvisualcpp) shift ;; "-Gm"|"/Gm"|"-Gi"|"/Gi"|"-ZI"|"/ZI") - set fnord "$@" - shift - shift - ;; + set fnord "$@" + shift + shift + ;; *) - set fnord "$@" "$arg" - shift - shift - ;; + set fnord "$@" "$arg" + shift + shift + ;; esac done "$@" -E 2>/dev/null | sed -n '/^#line [0-9][0-9]* "\([^"]*\)"/ s::\1:p' | $cygpath_u | sort -u > "$tmpdepfile" rm -f "$depfile" echo "$object : \\" > "$depfile" - sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s:: \1 \\:p' >> "$depfile" - echo " " >> "$depfile" + sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s::'"$tab"'\1 \\:p' >> "$depfile" + echo "$tab" >> "$depfile" sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s::\1\::p' >> "$depfile" rm -f "$tmpdepfile" ;; @@ -680,9 +783,9 @@ exit 0 # Local Variables: # mode: shell-script # sh-indentation: 2 -# eval: (add-hook 'write-file-hooks 'time-stamp) +# eval: (add-hook 'before-save-hook 'time-stamp) # time-stamp-start: "scriptversion=" # time-stamp-format: "%:y-%02m-%02d.%02H" -# time-stamp-time-zone: "UTC" +# time-stamp-time-zone: "UTC0" # time-stamp-end: "; # UTC" # End: diff --git a/extern/libpng/include/example.c b/extern/libpng/example.c similarity index 57% rename from extern/libpng/include/example.c rename to extern/libpng/example.c index c20d86b154..2e2afaafb6 100644 --- a/extern/libpng/include/example.c +++ b/extern/libpng/example.c @@ -2,19 +2,22 @@ #if 0 /* in case someone actually tries to compile this */ /* example.c - an example of using libpng - * Last changed in libpng 1.5.10 [March 8, 2012] - * Maintained 1998-2012 Glenn Randers-Pehrson - * Maintained 1996, 1997 Andreas Dilger - * Written 1995, 1996 Guy Eric Schalnat, Group 42, Inc. + * + * Maintained 2018 Cosmin Truta + * Maintained 1998-2016 Glenn Randers-Pehrson + * Maintained 1996-1997 Andreas Dilger + * Written 1995-1996 Guy Eric Schalnat, Group 42, Inc. + * + * To the extent possible under law, the authors have waived + * all copyright and related or neighboring rights to this file. + * This work is published from: United States, Canada. */ /* This is an example of how to use libpng to read and write PNG files. - * The file libpng-manual.txt is much more verbose then this. If you have not - * read it, do so first. This was designed to be a starting point of an + * The file libpng-manual.txt is much more verbose then this. If you have + * not read it, do so first. This was designed to be a starting point of an * implementation. This is not officially part of libpng, is hereby placed * in the public domain, and therefore does not require a copyright notice. - * To the extent possible under law, the authors have waived all copyright and - * related or neighboring rights to this file. * * This file does not currently compile, because it is missing certain * parts, like allocating memory to hold an image. You will have to @@ -23,16 +26,198 @@ * see also the programs in the contrib directory. */ -#define _POSIX_SOURCE 1 /* libpng and zlib are POSIX-compliant. You may - * change this if your application uses non-POSIX - * extensions. */ +/* The simple, but restricted approach to reading a PNG file or data stream + * requires just two function calls, as in the following complete program. + * Writing a file needs just one function call, so long as the data has an + * appropriate layout. + * + * The following code reads PNG image data from a file and writes it, in a + * potentially new format, to a new file. While this code will compile, there + * is minimal (insufficient) error checking. For a more realistic version, + * see contrib/examples/pngtopng.c + */ -#include "png.h" +#include +#include +#include +#include +#include +#include + +int main(int argc, const char **argv) +{ + if (argc == 3) + { + png_image image; /* The control structure used by libpng */ + + /* Initialize the 'png_image' structure. */ + memset(&image, 0, (sizeof image)); + image.version = PNG_IMAGE_VERSION; + + /* The first argument is the file to read: */ + if (png_image_begin_read_from_file(&image, argv[1]) != 0) + { + png_bytep buffer; + + /* Set the format in which to read the PNG file; this code chooses a + * simple sRGB format with a non-associated alpha channel, adequate to + * store most images. + */ + image.format = PNG_FORMAT_RGBA; + + /* Now allocate enough memory to hold the image in this format; the + * PNG_IMAGE_SIZE macro uses the information about the image (width, + * height and format) stored in 'image'. + */ + buffer = malloc(PNG_IMAGE_SIZE(image)); + + /* If enough memory was available, read the image in the desired + * format, then write the result out to the new file. 'background' is + * not necessary when reading the image, because the alpha channel is + * preserved; if it were to be removed, for example if we requested + * PNG_FORMAT_RGB, then either a solid background color would have to + * be supplied, or the output buffer would have to be initialized to + * the actual background of the image. + * + * The fourth argument to png_image_finish_read is the 'row_stride' - + * this is the number of components allocated for the image in each + * row. It has to be at least as big as the value returned by + * PNG_IMAGE_ROW_STRIDE, but if you just allocate space for the + * default, minimum size, using PNG_IMAGE_SIZE as above, you can pass + * zero. + * + * The final argument is a pointer to a buffer for the colormap; + * colormaps have exactly the same format as a row of image pixels + * (so you choose what format to make the colormap by setting + * image.format). A colormap is only returned if + * PNG_FORMAT_FLAG_COLORMAP is also set in image.format, so in this + * case NULL is passed as the final argument. If you do want to force + * all images into an index/color-mapped format, then you can use: + * + * PNG_IMAGE_COLORMAP_SIZE(image) + * + * to find the maximum size of the colormap in bytes. + */ + if (buffer != NULL && + png_image_finish_read(&image, NULL/*background*/, buffer, + 0/*row_stride*/, NULL/*colormap*/) != 0) + { + /* Now write the image out to the second argument. In the write + * call 'convert_to_8bit' allows 16-bit data to be squashed down to + * 8 bits; this isn't necessary here because the original read was + * to the 8-bit format. + */ + if (png_image_write_to_file(&image, argv[2], 0/*convert_to_8bit*/, + buffer, 0/*row_stride*/, NULL/*colormap*/) != 0) + { + /* The image has been written successfully. */ + exit(0); + } + } + else + { + /* Calling png_image_free is optional unless the simplified API was + * not run to completion. In this case, if there wasn't enough + * memory for 'buffer', we didn't complete the read, so we must + * free the image: + */ + if (buffer == NULL) + png_image_free(&image); + else + free(buffer); + } + + /* Something went wrong reading or writing the image. libpng stores a + * textual message in the 'png_image' structure: + */ + fprintf(stderr, "pngtopng: error: %s\n", image.message); + exit(1); + } + + fprintf(stderr, "pngtopng: usage: pngtopng input-file output-file\n"); + exit(2); +} + +/* That's it ;-) Of course you probably want to do more with PNG files than + * just converting them all to 32-bit RGBA PNG files; you can do that between + * the call to png_image_finish_read and png_image_write_to_file. You can also + * ask for the image data to be presented in a number of different formats. + * You do this by simply changing the 'format' parameter set before allocating + * the buffer. + * + * The format parameter consists of five flags that define various aspects of + * the image. You can simply add these together to get the format, or you can + * use one of the predefined macros from png.h (as above): + * + * PNG_FORMAT_FLAG_COLOR: if set, the image will have three color components + * per pixel (red, green and blue); if not set, the image will just have one + * luminance (grayscale) component. + * + * PNG_FORMAT_FLAG_ALPHA: if set, each pixel in the image will have an + * additional alpha value; a linear value that describes the degree the + * image pixel covers (overwrites) the contents of the existing pixel on the + * display. + * + * PNG_FORMAT_FLAG_LINEAR: if set, the components of each pixel will be + * returned as a series of 16-bit linear values; if not set, the components + * will be returned as a series of 8-bit values encoded according to the + * sRGB standard. The 8-bit format is the normal format for images intended + * for direct display, because almost all display devices do the inverse of + * the sRGB transformation to the data they receive. The 16-bit format is + * more common for scientific data and image data that must be further + * processed; because it is linear, simple math can be done on the component + * values. Regardless of the setting of this flag, the alpha channel is + * always linear, although it will be 8 bits or 16 bits wide as specified by + * the flag. + * + * PNG_FORMAT_FLAG_BGR: if set, the components of a color pixel will be + * returned in the order blue, then green, then red. If not set, the pixel + * components are in the order red, then green, then blue. + * + * PNG_FORMAT_FLAG_AFIRST: if set, the alpha channel (if present) precedes the + * color or grayscale components. If not set, the alpha channel follows the + * components. + * + * You do not have to read directly from a file. You can read from memory or, + * on systems that support it, from a FILE*. This is controlled by + * the particular png_image_read_from_ function you call at the start. + * Likewise, on write, you can write to a FILE* if your system supports it. + * Check the macro PNG_STDIO_SUPPORTED to see if stdio support has been + * included in your libpng build. + * + * If you read 16-bit (PNG_FORMAT_FLAG_LINEAR) data, you may need to write it + * in the 8-bit format for display. You do this by setting the convert_to_8bit + * flag to 'true'. + * + * Don't repeatedly convert between the 8-bit and 16-bit forms. There is + * significant data loss when 16-bit data is converted to the 8-bit encoding, + * and the current libpng implementation of conversion to 16-bit is also + * significantly lossy. The latter will be fixed in the future, but the former + * is unavoidable - the 8-bit format just doesn't have enough resolution. + */ + +/* If your program needs more information from the PNG data it reads, or if you + * need to do more complex transformations, or minimize transformations, on the + * data you read, then you must use one of the several lower level libpng + * interfaces. + * + * All these interfaces require that you do your own error handling - your + * program must be able to arrange for control to return to your own code, any + * time libpng encounters a problem. There are several ways to do this, but + * the standard way is to use the interface to establish a return + * point within your own code. You must do this if you do not use the + * simplified interface (above). + * + * The first step is to include the header files you need, including the libpng + * header file. Include any standard headers and feature test macros your + * program requires before including png.h: + */ +#include /* The png_jmpbuf() macro, used in error handling, became available in * libpng version 1.0.6. If you want to be able to run your code with older * versions of libpng, you must define the macro yourself (but only if it - * is not already defined by libpng!). + * is not already defined by libpng!) */ #ifndef png_jmpbuf @@ -40,10 +225,10 @@ #endif /* Check to see if a file is a PNG file using png_sig_cmp(). png_sig_cmp() - * returns zero if the image is a PNG and nonzero if it isn't a PNG. + * returns zero if the image is a PNG, and nonzero otherwise. * * The function check_if_png() shown here, but not used, returns nonzero (true) - * if the file can be opened and is a PNG, 0 (false) otherwise. + * if the file can be opened and is a PNG, and 0 (false) otherwise. * * If this call is successful, and you are going to keep the file open, * you should call png_set_sig_bytes(png_ptr, PNG_BYTES_TO_CHECK); once @@ -56,7 +241,7 @@ * * Many applications already read the first 2 or 4 bytes from the start * of the image to determine the file type, so it would be easiest just - * to pass the bytes to png_sig_cmp() or even skip that if you know + * to pass the bytes to png_sig_cmp(), or even skip that if you know * you have a PNG file, and call png_set_sig_bytes(). */ #define PNG_BYTES_TO_CHECK 4 @@ -68,14 +253,14 @@ int check_if_png(char *file_name, FILE **fp) if ((*fp = fopen(file_name, "rb")) == NULL) return 0; - /* Read in some of the signature bytes */ + /* Read in some of the signature bytes. */ if (fread(buf, 1, PNG_BYTES_TO_CHECK, *fp) != PNG_BYTES_TO_CHECK) return 0; /* Compare the first PNG_BYTES_TO_CHECK bytes of the signature. - Return nonzero (true) if they match */ - - return(!png_sig_cmp(buf, (png_size_t)0, PNG_BYTES_TO_CHECK)); + * Return nonzero (true) if they match. + */ + return(!png_sig_cmp(buf, 0, PNG_BYTES_TO_CHECK)); } /* Read a PNG file. You may want to return an error code if the read @@ -85,11 +270,11 @@ int check_if_png(char *file_name, FILE **fp) * some or all of the magic bytes read - see comments above). */ #ifdef open_file /* prototype 1 */ -void read_png(char *file_name) /* We need to open the file */ +void read_png(char *file_name) /* We need to open the file */ { png_structp png_ptr; png_infop info_ptr; - unsigned int sig_read = 0; + int sig_read = 0; png_uint_32 width, height; int bit_depth, color_type, interlace_type; FILE *fp; @@ -98,7 +283,7 @@ void read_png(char *file_name) /* We need to open the file */ return (ERROR); #else no_open_file /* prototype 2 */ -void read_png(FILE *fp, unsigned int sig_read) /* File is already open */ +void read_png(FILE *fp, int sig_read) /* File is already open */ { png_structp png_ptr; png_infop info_ptr; @@ -110,10 +295,10 @@ void read_png(FILE *fp, unsigned int sig_read) /* File is already open */ * functions. If you want to use the default stderr and longjump method, * you can supply NULL for the last three parameters. We also supply the * the compiler header file version, so that we know if the application - * was compiled with a compatible version of the library. REQUIRED + * was compiled with a compatible version of the library. REQUIRED. */ png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, - png_voidp user_error_ptr, user_error_fn, user_warning_fn); + png_voidp user_error_ptr, user_error_fn, user_warning_fn); if (png_ptr == NULL) { @@ -134,35 +319,33 @@ void read_png(FILE *fp, unsigned int sig_read) /* File is already open */ * the normal method of doing things with libpng). REQUIRED unless you * set up your own error handlers in the png_create_read_struct() earlier. */ - if (setjmp(png_jmpbuf(png_ptr))) { - /* Free all of the memory associated with the png_ptr and info_ptr */ + /* Free all of the memory associated with the png_ptr and info_ptr. */ png_destroy_read_struct(&png_ptr, &info_ptr, NULL); fclose(fp); - /* If we get here, we had a problem reading the file */ + /* If we get here, we had a problem reading the file. */ return (ERROR); } - /* One of the following I/O initialization methods is REQUIRED */ + /* One of the following I/O initialization methods is REQUIRED. */ #ifdef streams /* PNG file I/O method 1 */ - /* Set up the input control if you are using standard C streams */ + /* Set up the input control if you are using standard C streams. */ png_init_io(png_ptr, fp); #else no_streams /* PNG file I/O method 2 */ /* If you are using replacement read functions, instead of calling - * png_init_io() here you would call: + * png_init_io(), you would call: */ png_set_read_fn(png_ptr, (void *)user_io_ptr, user_read_fn); - /* where user_io_ptr is a structure you want available to the callbacks */ + /* where user_io_ptr is a structure you want available to the callbacks. */ #endif no_streams /* Use only one I/O method! */ /* If we have already read some of the signature */ png_set_sig_bytes(png_ptr, sig_read); #ifdef hilevel - /* - * If you have enough memory to read in the entire image at once, + /* If you have enough memory to read in the entire image at once, * and you need to specify only transforms that can be controlled * with one of the PNG_TRANSFORM_* bits (this presently excludes * quantizing, filling, setting background, and doing gamma @@ -172,10 +355,10 @@ void read_png(FILE *fp, unsigned int sig_read) /* File is already open */ png_read_png(png_ptr, info_ptr, png_transforms, NULL); #else - /* OK, you're doing it the hard way, with the lower-level functions */ + /* OK, you're doing it the hard way, with the lower-level functions. */ /* The call to png_read_info() gives us all of the information from the - * PNG file before the first IDAT (image data chunk). REQUIRED + * PNG file before the first IDAT (image data chunk). REQUIRED. */ png_read_info(png_ptr, info_ptr); @@ -188,12 +371,12 @@ void read_png(FILE *fp, unsigned int sig_read) /* File is already open */ * are mutually exclusive. */ - /* Tell libpng to strip 16 bit/color files down to 8 bits/color. + /* Tell libpng to strip 16 bits/color files down to 8 bits/color. * Use accurate scaling if it's available, otherwise just chop off the * low byte. */ #ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED - png_set_scale_16(png_ptr); + png_set_scale_16(png_ptr); #else png_set_strip_16(png_ptr); #endif @@ -203,144 +386,137 @@ void read_png(FILE *fp, unsigned int sig_read) /* File is already open */ */ png_set_strip_alpha(png_ptr); - /* Extract multiple pixels with bit depths of 1, 2, and 4 from a single + /* Extract multiple pixels with bit depths of 1, 2 or 4 from a single * byte into separate bytes (useful for paletted and grayscale images). */ png_set_packing(png_ptr); /* Change the order of packed pixels to least significant bit first - * (not useful if you are using png_set_packing). */ + * (not useful if you are using png_set_packing). + */ png_set_packswap(png_ptr); - /* Expand paletted colors into true RGB triplets */ + /* Expand paletted colors into true RGB triplets. */ if (color_type == PNG_COLOR_TYPE_PALETTE) png_set_palette_to_rgb(png_ptr); - /* Expand grayscale images to the full 8 bits from 1, 2, or 4 bits/pixel */ + /* Expand grayscale images to the full 8 bits from 1, 2 or 4 bits/pixel. */ if (color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8) png_set_expand_gray_1_2_4_to_8(png_ptr); /* Expand paletted or RGB images with transparency to full alpha channels * so the data will be available as RGBA quartets. */ - if (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS)) + if (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS) != 0) png_set_tRNS_to_alpha(png_ptr); /* Set the background color to draw transparent and alpha images over. - * It is possible to set the red, green, and blue components directly - * for paletted images instead of supplying a palette index. Note that + * It is possible to set the red, green and blue components directly + * for paletted images, instead of supplying a palette index. Note that, * even if the PNG file supplies a background, you are not required to * use it - you should use the (solid) application background if it has one. */ - png_color_16 my_background, *image_background; - if (png_get_bKGD(png_ptr, info_ptr, &image_background)) + if (png_get_bKGD(png_ptr, info_ptr, &image_background) != 0) png_set_background(png_ptr, image_background, - PNG_BACKGROUND_GAMMA_FILE, 1, 1.0); + PNG_BACKGROUND_GAMMA_FILE, 1, 1.0); else png_set_background(png_ptr, &my_background, - PNG_BACKGROUND_GAMMA_SCREEN, 0, 1.0); + PNG_BACKGROUND_GAMMA_SCREEN, 0, 1.0); - /* Some suggestions as to how to get a screen gamma value + /* Some suggestions as to how to get a screen gamma value. * * Note that screen gamma is the display_exponent, which includes - * the CRT_exponent and any correction for viewing conditions + * the CRT_exponent and any correction for viewing conditions. */ if (/* We have a user-defined screen gamma value */) - { screen_gamma = user-defined screen_gamma; - } - /* This is one way that applications share the same screen gamma value */ + /* This is one way that applications share the same screen gamma value. */ else if ((gamma_str = getenv("SCREEN_GAMMA")) != NULL) - { screen_gamma = atof(gamma_str); - } /* If we don't have another value */ else { - screen_gamma = 2.2; /* A good guess for a PC monitor in a dimly - lit room */ - screen_gamma = 1.7 or 1.0; /* A good guess for Mac systems */ + screen_gamma = PNG_DEFAULT_sRGB; /* A good guess for a PC monitor + in a dimly lit room */ + screen_gamma = PNG_GAMMA_MAC_18 or 1.0; /* Good guesses for Mac + systems */ } /* Tell libpng to handle the gamma conversion for you. The final call * is a good guess for PC generated images, but it should be configurable - * by the user at run time by the user. It is strongly suggested that - * your application support gamma correction. + * by the user at run time. Gamma correction support in your application + * is strongly recommended. */ int intent; - if (png_get_sRGB(png_ptr, info_ptr, &intent)) - png_set_gamma(png_ptr, screen_gamma, 0.45455); + if (png_get_sRGB(png_ptr, info_ptr, &intent) != 0) + png_set_gamma(png_ptr, screen_gamma, PNG_DEFAULT_sRGB); else { double image_gamma; - if (png_get_gAMA(png_ptr, info_ptr, &image_gamma)) + if (png_get_gAMA(png_ptr, info_ptr, &image_gamma) != 0) png_set_gamma(png_ptr, screen_gamma, image_gamma); else png_set_gamma(png_ptr, screen_gamma, 0.45455); } #ifdef PNG_READ_QUANTIZE_SUPPORTED - /* Quantize RGB files down to 8 bit palette or reduce palettes + /* Quantize RGB files down to 8-bit palette, or reduce palettes * to the number of colors available on your screen. */ - if (color_type & PNG_COLOR_MASK_COLOR) + if ((color_type & PNG_COLOR_MASK_COLOR) != 0) { int num_palette; png_colorp palette; - /* This reduces the image to the application supplied palette */ + /* This reduces the image to the application-supplied palette. */ if (/* We have our own palette */) { - /* An array of colors to which the image should be quantized */ + /* An array of colors to which the image should be quantized. */ png_color std_color_cube[MAX_SCREEN_COLORS]; - png_set_quantize(png_ptr, std_color_cube, MAX_SCREEN_COLORS, - MAX_SCREEN_COLORS, NULL, 0); + MAX_SCREEN_COLORS, NULL, 0); } - /* This reduces the image to the palette supplied in the file */ - else if (png_get_PLTE(png_ptr, info_ptr, &palette, &num_palette)) + /* This reduces the image to the palette supplied in the file. */ + else if (png_get_PLTE(png_ptr, info_ptr, &palette, &num_palette) != 0) { png_uint_16p histogram = NULL; - png_get_hIST(png_ptr, info_ptr, &histogram); - png_set_quantize(png_ptr, palette, num_palette, - max_screen_colors, histogram, 0); + max_screen_colors, histogram, 0); } } -#endif /* PNG_READ_QUANTIZE_SUPPORTED */ +#endif /* READ_QUANTIZE */ - /* Invert monochrome files to have 0 as white and 1 as black */ + /* Invert monochrome files to have 0 as white and 1 as black. */ png_set_invert_mono(png_ptr); /* If you want to shift the pixel values from the range [0,255] or * [0,65535] to the original [0,7] or [0,31], or whatever range the * colors were originally in: */ - if (png_get_valid(png_ptr, info_ptr, PNG_INFO_sBIT)) + if (png_get_valid(png_ptr, info_ptr, PNG_INFO_sBIT) != 0) { png_color_8p sig_bit_p; - png_get_sBIT(png_ptr, info_ptr, &sig_bit_p); png_set_shift(png_ptr, sig_bit_p); } - /* Flip the RGB pixels to BGR (or RGBA to BGRA) */ - if (color_type & PNG_COLOR_MASK_COLOR) + /* Flip the RGB pixels to BGR (or RGBA to BGRA). */ + if ((color_type & PNG_COLOR_MASK_COLOR) != 0) png_set_bgr(png_ptr); - /* Swap the RGBA or GA data to ARGB or AG (or BGRA to ABGR) */ + /* Swap the RGBA or GA data to ARGB or AG (or BGRA to ABGR). */ png_set_swap_alpha(png_ptr); - /* Swap bytes of 16 bit files to least significant byte first */ + /* Swap bytes of 16-bit files to least significant byte first. */ png_set_swap(png_ptr); - /* Add filler (or alpha) byte (before/after each RGB triplet) */ - png_set_filler(png_ptr, 0xff, PNG_FILLER_AFTER); + /* Add filler (or alpha) byte (before/after each RGB triplet). */ + png_set_filler(png_ptr, 0xffff, PNG_FILLER_AFTER); #ifdef PNG_READ_INTERLACING_SUPPORTED /* Turn on interlace handling. REQUIRED if you are not using @@ -348,75 +524,66 @@ void read_png(FILE *fp, unsigned int sig_read) /* File is already open */ * see the png_read_row() method below: */ number_passes = png_set_interlace_handling(png_ptr); -#else +#else /* !READ_INTERLACING */ number_passes = 1; -#endif /* PNG_READ_INTERLACING_SUPPORTED */ - +#endif /* READ_INTERLACING */ /* Optional call to gamma correct and add the background to the palette * and update info structure. REQUIRED if you are expecting libpng to - * update the palette for you (ie you selected such a transform above). + * update the palette for you (i.e. you selected such a transform above). */ png_read_update_info(png_ptr, info_ptr); /* Allocate the memory to hold the image using the fields of info_ptr. */ - - /* The easiest way to read the image: */ png_bytep row_pointers[height]; - - /* Clear the pointer array */ for (row = 0; row < height; row++) - row_pointers[row] = NULL; - + row_pointers[row] = NULL; /* Clear the pointer array */ for (row = 0; row < height; row++) row_pointers[row] = png_malloc(png_ptr, png_get_rowbytes(png_ptr, - info_ptr)); + info_ptr)); - /* Now it's time to read the image. One of these methods is REQUIRED */ + /* Now it's time to read the image. One of these methods is REQUIRED. */ #ifdef entire /* Read the entire image in one go */ png_read_image(png_ptr, row_pointers); #else no_entire /* Read the image one or more scanlines at a time */ /* The other way to read images - deal with interlacing: */ - for (pass = 0; pass < number_passes; pass++) { #ifdef single /* Read the image a single row at a time */ for (y = 0; y < height; y++) - { png_read_rows(png_ptr, &row_pointers[y], NULL, 1); - } #else no_single /* Read the image several rows at a time */ for (y = 0; y < height; y += number_of_rows) { #ifdef sparkle /* Read the image using the "sparkle" effect. */ png_read_rows(png_ptr, &row_pointers[y], NULL, - number_of_rows); + number_of_rows); #else no_sparkle /* Read the image using the "rectangle" effect */ png_read_rows(png_ptr, NULL, &row_pointers[y], - number_of_rows); + number_of_rows); #endif no_sparkle /* Use only one of these two methods */ } - /* If you want to display the image after every pass, do so here */ + /* If you want to display the image after every pass, do so here. */ #endif no_single /* Use only one of these two methods */ } #endif no_entire /* Use only one of these two methods */ - /* Read rest of file, and get additional chunks in info_ptr - REQUIRED */ + /* Read rest of file, and get additional chunks in info_ptr. REQUIRED. */ png_read_end(png_ptr, info_ptr); #endif hilevel - /* At this point you have read the entire image */ + /* At this point you have read the entire image. */ - /* Clean up after the read, and free any memory allocated - REQUIRED */ + /* Clean up after the read, and free any memory allocated. REQUIRED. */ png_destroy_read_struct(&png_ptr, &info_ptr, NULL); - /* Close the file */ + /* Close the file. */ fclose(fp); - /* That's it */ + /* That's it! */ return (OK); } @@ -428,34 +595,30 @@ initialize_png_reader(png_structp *png_ptr, png_infop *info_ptr) /* Create and initialize the png_struct with the desired error handler * functions. If you want to use the default stderr and longjump method, * you can supply NULL for the last three parameters. We also check that - * the library version is compatible in case we are using dynamically + * the library version is compatible, in case we are using dynamically * linked libraries. */ *png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, - png_voidp user_error_ptr, user_error_fn, user_warning_fn); - + png_voidp user_error_ptr, user_error_fn, user_warning_fn); if (*png_ptr == NULL) { *info_ptr = NULL; return (ERROR); } - *info_ptr = png_create_info_struct(png_ptr); - if (*info_ptr == NULL) { png_destroy_read_struct(png_ptr, info_ptr, NULL); return (ERROR); } - if (setjmp(png_jmpbuf((*png_ptr)))) { png_destroy_read_struct(png_ptr, info_ptr, NULL); return (ERROR); } - /* This one's new. You will need to provide all three - * function callbacks, even if you aren't using them all. + /* You will need to provide all three function callbacks, + * even if you aren't using all of them. * If you aren't using all functions, you can specify NULL * parameters. Even when all three functions are NULL, * you need to call png_set_progressive_read_fn(). @@ -467,29 +630,28 @@ initialize_png_reader(png_structp *png_ptr, png_infop *info_ptr) * the function png_get_progressive_ptr(png_ptr). */ png_set_progressive_read_fn(*png_ptr, (void *)stream_data, - info_callback, row_callback, end_callback); - + info_callback, row_callback, end_callback); return (OK); } int process_data(png_structp *png_ptr, png_infop *info_ptr, - png_bytep buffer, png_uint_32 length) + png_bytep buffer, png_uint_32 length) { if (setjmp(png_jmpbuf((*png_ptr)))) { - /* Free the png_ptr and info_ptr memory on error */ + /* Free the png_ptr and info_ptr memory on error. */ png_destroy_read_struct(png_ptr, info_ptr, NULL); return (ERROR); } - /* This one's new also. Simply give it chunks of data as - * they arrive from the data stream (in order, of course). + /* Give chunks of data as they arrive from the data stream + * (in order, of course). * On segmented machines, don't give it any more than 64K. * The library seems to run fine with sizes of 4K, although - * you can give it much less if necessary (I assume you can + * you can give it much less if necessary. (I assume you can * give it chunks of 1 byte, but I haven't tried with less - * than 256 bytes yet). When this function returns, you may + * than 256 bytes yet.) When this function returns, you may * want to display any rows that were generated in the row * callback, if you aren't already displaying them there. */ @@ -509,10 +671,9 @@ info_callback(png_structp png_ptr, png_infop info) } row_callback(png_structp png_ptr, png_bytep new_row, - png_uint_32 row_num, int pass) + png_uint_32 row_num, int pass) { - /* - * This function is called for every row in the image. If the + /* This function is called for every row in the image. If the * image is interlaced, and you turned on the interlace handler, * this function will be called for every row in every pass. * @@ -523,25 +684,22 @@ row_callback(png_structp png_ptr, png_bytep new_row, * The new row data pointer "new_row" may be NULL, indicating there is * no new data to be replaced (in cases of interlace loading). * - * If new_row is not NULL then you need to call - * png_progressive_combine_row() to replace the corresponding row as + * If new_row is not NULL, then you need to call + * png_progressive_combine_row(), to replace the corresponding row as * shown below: */ - /* Get pointer to corresponding row in our - * PNG read buffer. - */ + /* Get pointer to corresponding row in our PNG read buffer. */ png_bytep old_row = ((png_bytep *)our_data)[row_num]; #ifdef PNG_READ_INTERLACING_SUPPORTED - /* If both rows are allocated then copy the new row + /* If both rows are allocated, then copy the new row * data to the corresponding row data. */ - if ((old_row != NULL) && (new_row != NULL)) - png_progressive_combine_row(png_ptr, old_row, new_row); + if (old_row != NULL && new_row != NULL) + png_progressive_combine_row(png_ptr, old_row, new_row); - /* - * The rows and passes are called in order, so you don't really + /* The rows and passes are called in order, so you don't really * need the row_num and pass, but I'm supplying them because it * may make your life easier. * @@ -549,10 +707,9 @@ row_callback(png_structp png_ptr, png_bytep new_row, * png_progressive_combine_row() passing in the new row and the * old row, as demonstrated above. You can call this function for * NULL rows (it will just return) and for non-interlaced images - * (it just does the png_memcpy for you) if it will make the code + * (it just does the memcpy for you) if it will make the code * easier. Thus, you can just do this for all cases: */ - png_progressive_combine_row(png_ptr, old_row, new_row); /* where old_row is what was displayed for previous rows. Note @@ -562,7 +719,7 @@ row_callback(png_structp png_ptr, png_bytep new_row, * to pass the current row as new_row, and the function will combine * the old row and the new row. */ -#endif /* PNG_READ_INTERLACING_SUPPORTED */ +#endif /* READ_INTERLACING */ } end_callback(png_structp png_ptr, png_infop info) @@ -598,15 +755,14 @@ void write_png(char *file_name /* , ... other image information ... */) * in case we are using dynamically linked libraries. REQUIRED. */ png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, - png_voidp user_error_ptr, user_error_fn, user_warning_fn); - + png_voidp user_error_ptr, user_error_fn, user_warning_fn); if (png_ptr == NULL) { fclose(fp); return (ERROR); } - /* Allocate/initialize the image information data. REQUIRED */ + /* Allocate/initialize the image information data. REQUIRED. */ info_ptr = png_create_info_struct(png_ptr); if (info_ptr == NULL) { @@ -615,30 +771,30 @@ void write_png(char *file_name /* , ... other image information ... */) return (ERROR); } - /* Set error handling. REQUIRED if you aren't supplying your own + /* Set up error handling. REQUIRED if you aren't supplying your own * error handling functions in the png_create_write_struct() call. */ if (setjmp(png_jmpbuf(png_ptr))) { - /* If we get here, we had a problem writing the file */ + /* If we get here, we had a problem writing the file. */ fclose(fp); png_destroy_write_struct(&png_ptr, &info_ptr); return (ERROR); } - /* One of the following I/O initialization functions is REQUIRED */ + /* One of the following I/O initialization functions is REQUIRED. */ #ifdef streams /* I/O initialization method 1 */ - /* Set up the output control if you are using standard C streams */ + /* Set up the output control if you are using standard C streams. */ png_init_io(png_ptr, fp); #else no_streams /* I/O initialization method 2 */ /* If you are using replacement write functions, instead of calling - * png_init_io() here you would call + * png_init_io(), you would call: */ png_set_write_fn(png_ptr, (void *)user_io_ptr, user_write_fn, - user_IO_flush_function); - /* where user_io_ptr is a structure you want available to the callbacks */ + user_IO_flush_function); + /* where user_io_ptr is a structure you want available to the callbacks. */ #endif no_streams /* Only use one initialization method */ #ifdef hilevel @@ -649,30 +805,32 @@ void write_png(char *file_name /* , ... other image information ... */) png_write_png(png_ptr, info_ptr, png_transforms, NULL); #else - /* This is the hard way */ + /* This is the hard way. */ /* Set the image information here. Width and height are up to 2^31, - * bit_depth is one of 1, 2, 4, 8, or 16, but valid values also depend on - * the color_type selected. color_type is one of PNG_COLOR_TYPE_GRAY, + * bit_depth is one of 1, 2, 4, 8 or 16, but valid values also depend on + * the color_type selected. color_type is one of PNG_COLOR_TYPE_GRAY, * PNG_COLOR_TYPE_GRAY_ALPHA, PNG_COLOR_TYPE_PALETTE, PNG_COLOR_TYPE_RGB, * or PNG_COLOR_TYPE_RGB_ALPHA. interlace is either PNG_INTERLACE_NONE or * PNG_INTERLACE_ADAM7, and the compression_type and filter_type MUST - * currently be PNG_COMPRESSION_TYPE_BASE and PNG_FILTER_TYPE_BASE. REQUIRED + * currently be PNG_COMPRESSION_TYPE_BASE and PNG_FILTER_TYPE_BASE. + * REQUIRED. */ - png_set_IHDR(png_ptr, info_ptr, width, height, bit_depth, PNG_COLOR_TYPE_???, - PNG_INTERLACE_????, PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE); + png_set_IHDR(png_ptr, info_ptr, width, height, bit_depth, + PNG_COLOR_TYPE_???, PNG_INTERLACE_????, + PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE); - /* Set the palette if there is one. REQUIRED for indexed-color images */ - palette = (png_colorp)png_malloc(png_ptr, PNG_MAX_PALETTE_LENGTH - * png_sizeof(png_color)); + /* Set the palette if there is one. REQUIRED for indexed-color images. */ + palette = (png_colorp)png_malloc(png_ptr, + PNG_MAX_PALETTE_LENGTH * (sizeof (png_color))); /* ... Set palette colors ... */ png_set_PLTE(png_ptr, info_ptr, palette, PNG_MAX_PALETTE_LENGTH); - /* You must not free palette here, because png_set_PLTE only makes a link to - * the palette that you malloced. Wait until you are about to destroy + /* You must not free palette here, because png_set_PLTE only makes a link + * to the palette that you allocated. Wait until you are about to destroy * the png structure. */ - /* Optional significant bit (sBIT) chunk */ + /* Optional significant bit (sBIT) chunk. */ png_color_8 sig_bit; /* If we are dealing with a grayscale image then */ @@ -688,18 +846,17 @@ void write_png(char *file_name /* , ... other image information ... */) png_set_sBIT(png_ptr, info_ptr, &sig_bit); - /* Optional gamma chunk is strongly suggested if you have any guess * as to the correct gamma of the image. */ png_set_gAMA(png_ptr, info_ptr, gamma); - /* Optionally write comments into the image */ + /* Optionally write comments into the image. */ { png_text text_ptr[3]; - char key0[]="Title"; - char text0[]="Mona Lisa"; + char key0[] = "Title"; + char text0[] = "Mona Lisa"; text_ptr[0].key = key0; text_ptr[0].text = text0; text_ptr[0].compression = PNG_TEXT_COMPRESSION_NONE; @@ -707,8 +864,8 @@ void write_png(char *file_name /* , ... other image information ... */) text_ptr[0].lang = NULL; text_ptr[0].lang_key = NULL; - char key1[]="Author"; - char text1[]="Leonardo DaVinci"; + char key1[] = "Author"; + char text1[] = "Leonardo DaVinci"; text_ptr[1].key = key1; text_ptr[1].text = text1; text_ptr[1].compression = PNG_TEXT_COMPRESSION_NONE; @@ -716,8 +873,8 @@ void write_png(char *file_name /* , ... other image information ... */) text_ptr[1].lang = NULL; text_ptr[1].lang_key = NULL; - char key2[]="Description"; - char text2[]=""; + char key2[] = "Description"; + char text2[] = ""; text_ptr[2].key = key2; text_ptr[2].text = text2; text_ptr[2].compression = PNG_TEXT_COMPRESSION_zTXt; @@ -728,14 +885,14 @@ void write_png(char *file_name /* , ... other image information ... */) png_set_text(write_ptr, write_info_ptr, text_ptr, 3); } - /* Other optional chunks like cHRM, bKGD, tRNS, tIME, oFFs, pHYs */ + /* Other optional chunks like cHRM, bKGD, tRNS, tIME, oFFs, pHYs. */ - /* Note that if sRGB is present the gAMA and cHRM chunks must be ignored + /* Note that if sRGB is present, the gAMA and cHRM chunks must be ignored * on read and, if your application chooses to write them, they must - * be written in accordance with the sRGB profile + * be written in accordance with the sRGB profile. */ - /* Write the file header information. REQUIRED */ + /* Write the file header information. REQUIRED. */ png_write_info(png_ptr, info_ptr); /* If you want, you can write the info in two steps, in case you need to @@ -750,7 +907,7 @@ void write_png(char *file_name /* , ... other image information ... */) */ /* Once we write out the header, the compression type on the text - * chunks gets changed to PNG_TEXT_COMPRESSION_NONE_WR or + * chunk gets changed to PNG_TEXT_COMPRESSION_NONE_WR or * PNG_TEXT_COMPRESSION_zTXt_WR, so it doesn't get written out again * at the end. */ @@ -759,7 +916,7 @@ void write_png(char *file_name /* , ... other image information ... */) * all optional. Only call them if you want them. */ - /* Invert monochrome pixels */ + /* Invert monochrome pixels. */ png_set_invert_mono(png_ptr); /* Shift the pixels up to a legal bit depth and fill in @@ -767,30 +924,29 @@ void write_png(char *file_name /* , ... other image information ... */) */ png_set_shift(png_ptr, &sig_bit); - /* Pack pixels into bytes */ + /* Pack pixels into bytes. */ png_set_packing(png_ptr); - /* Swap location of alpha bytes from ARGB to RGBA */ + /* Swap location of alpha bytes from ARGB to RGBA. */ png_set_swap_alpha(png_ptr); /* Get rid of filler (OR ALPHA) bytes, pack XRGB/RGBX/ARGB/RGBA into - * RGB (4 channels -> 3 channels). The second parameter is not used. + * RGB (4 channels -> 3 channels). The second parameter is not used. */ png_set_filler(png_ptr, 0, PNG_FILLER_BEFORE); - /* Flip BGR pixels to RGB */ + /* Flip BGR pixels to RGB. */ png_set_bgr(png_ptr); - /* Swap bytes of 16-bit files to most significant byte first */ + /* Swap bytes of 16-bit files to most significant byte first. */ png_set_swap(png_ptr); - /* Swap bits of 1, 2, 4 bit packed pixel formats */ + /* Swap bits of 1-bit, 2-bit, 4-bit packed pixel formats. */ png_set_packswap(png_ptr); - /* Turn on interlace handling if you are not using png_write_image() */ - if (interlacing) + /* Turn on interlace handling if you are not using png_write_image(). */ + if (interlacing != 0) number_passes = png_set_interlace_handling(png_ptr); - else number_passes = 1; @@ -799,21 +955,29 @@ void write_png(char *file_name /* , ... other image information ... */) * use the first method if you aren't handling interlacing yourself. */ png_uint_32 k, height, width; - png_byte image[height][width*bytes_per_pixel]; + + /* In this example, "image" is a one-dimensional array of bytes. */ + + /* Guard against integer overflow. */ + if (height > PNG_SIZE_MAX / (width * bytes_per_pixel)) + png_error(png_ptr, "Image data buffer would be too large"); + + png_byte image[height * width * bytes_per_pixel]; png_bytep row_pointers[height]; - if (height > PNG_UINT_32_MAX/png_sizeof(png_bytep)) - png_error (png_ptr, "Image is too tall to process in memory"); + if (height > PNG_UINT_32_MAX / (sizeof (png_bytep))) + png_error(png_ptr, "Image is too tall to process in memory"); + /* Set up pointers into your "image" byte array. */ for (k = 0; k < height; k++) - row_pointers[k] = image + k*width*bytes_per_pixel; + row_pointers[k] = image + k * width * bytes_per_pixel; - /* One of the following output methods is REQUIRED */ + /* One of the following output methods is REQUIRED. */ #ifdef entire /* Write out the entire image data in one call */ png_write_image(png_ptr, row_pointers); - /* The other way to write the image - deal with interlacing */ + /* The other way to write the image - deal with interlacing. */ #else no_entire /* Write out the image data by one or more scanlines */ @@ -825,27 +989,27 @@ void write_png(char *file_name /* , ... other image information ... */) /* Write a few rows at a time. */ png_write_rows(png_ptr, &row_pointers[first_row], number_of_rows); - /* If you are only writing one row at a time, this works */ + /* If you are only writing one row at a time, this works. */ for (y = 0; y < height; y++) png_write_rows(png_ptr, &row_pointers[y], 1); } #endif no_entire /* Use only one output method */ /* You can write optional chunks like tEXt, zTXt, and tIME at the end - * as well. Shouldn't be necessary in 1.2.0 and up as all the public - * chunks are supported and you can use png_set_unknown_chunks() to + * as well. Shouldn't be necessary in 1.2.0 and up, as all the public + * chunks are supported, and you can use png_set_unknown_chunks() to * register unknown chunks into the info structure to be written out. */ - /* It is REQUIRED to call this to finish writing the rest of the file */ + /* It is REQUIRED to call this to finish writing the rest of the file. */ png_write_end(png_ptr, info_ptr); #endif hilevel - /* If you png_malloced a palette, free it here (don't free info_ptr->palette, - * as recommended in versions 1.0.5m and earlier of this example; if - * libpng mallocs info_ptr->palette, libpng will free it). If you - * allocated it with malloc() instead of png_malloc(), use free() instead - * of png_free(). + /* If you png_malloced a palette, free it here. + * (Don't free info_ptr->palette, as shown in versions 1.0.5m and earlier of + * this example; if libpng mallocs info_ptr->palette, libpng will free it). + * If you allocated it with malloc() instead of png_malloc(), use free() + * instead of png_free(). */ png_free(png_ptr, palette); palette = NULL; @@ -856,19 +1020,20 @@ void write_png(char *file_name /* , ... other image information ... */) */ png_free(png_ptr, trans); trans = NULL; - /* Whenever you use png_free() it is a good idea to set the pointer to + + /* Whenever you use png_free(), it is a good idea to set the pointer to * NULL in case your application inadvertently tries to png_free() it - * again. When png_free() sees a NULL it returns without action, thus - * avoiding the double-free security problem. + * again. When png_free() sees a NULL it returns without action, avoiding + * the double-free problem. */ - /* Clean up after the write, and free any memory allocated */ + /* Clean up after the write, and free any allocated memory. */ png_destroy_write_struct(&png_ptr, &info_ptr); - /* Close the file */ + /* Close the file. */ fclose(fp); - /* That's it */ + /* That's it! */ return (OK); } diff --git a/extern/libpng/include/ANNOUNCE b/extern/libpng/include/ANNOUNCE deleted file mode 100644 index dbc2ed1730..0000000000 --- a/extern/libpng/include/ANNOUNCE +++ /dev/null @@ -1,64 +0,0 @@ - -Libpng 1.5.10 - March 29, 2012 - -This is a public release of libpng, intended for use in production codes. - -Files available for download: - -Source files with LF line endings (for Unix/Linux) and with a -"configure" script - - libpng-1.5.10.tar.xz (LZMA-compressed, recommended) - libpng-1.5.10.tar.gz - libpng-1.5.10.tar.bz2 - -Source files with CRLF line endings (for Windows), without the -"configure" script - - lpng1510.7z (LZMA-compressed, recommended) - lpng1510.zip - -Other information: - - libpng-1.5.10-README.txt - libpng-1.5.10-LICENSE.txt - -Changes since the last public release (1.5.9): - - Removed two useless #ifdef directives from pngread.c and one from pngrutil.c - Always put the CMAKE_LIBRARY in "lib" (removed special WIN32 case). - Removed empty vstudio/pngstest directory (Clifford Yapp). - Eliminated redundant png_push_read_tEXt|zTXt|iTXt|unknown code from - pngpread.c and use the sequential png_handle_tEXt, etc., in pngrutil.c; - now that png_ptr->buffer is inaccessible to applications, the special - handling is no longer useful. - Fixed bug with png_handle_hIST with odd chunk length (Frank Busse). - Added PNG_SAFE_LIMITS feature to pnglibconf.dfa and code in pngconf.h - to reset the user limits to safe ones if PNG_SAFE_LIMITS is defined. - To enable, use "CPPFLAGS=-DPNG_SAFE_LIMITS_SUPPORTED" on the configure - command or put "#define PNG_SAFE_LIMITS_SUPPORTED" in pnglibconf.h. - Revised the SAFE_LIMITS feature to be the same as the feature in libpng16. - Added information about the new limits in the manual. - Updated Makefile.in - Removed unused "current_text" members of png_struct and the png_free() - of png_ptr->current_text from pngread.c - Fixed PNG_LIBPNG_BUILD_BASE_TYPE definition. - Fixed CMF optimization of non-IDAT compressed chunks, which was added at - libpng-1.5.4. It sometimes produced too small of a window. - Reject all iCCP chunks after the first, even if the first one is invalid. - Added palette-index checking. Issue a png_benign_error() if an invalid - index is found. - Revised example.c to put text strings in a temporary character array - instead of directly assigning string constants to png_textp members. - This avoids compiler warnings when -Wwrite-strings is enabled. - Prevent PNG_EXPAND+PNG_SHIFT doing the shift twice. - Revised png_set_text_2() to avoid potential memory corruption (fixes - CVE-2011-3048). - -Send comments/corrections/commendations to png-mng-implement at lists.sf.net -(subscription required; visit -https://lists.sourceforge.net/lists/listinfo/png-mng-implement -to subscribe) -or to glennrp at users.sourceforge.net - -Glenn R-P diff --git a/extern/libpng/include/CMakeLists.txt b/extern/libpng/include/CMakeLists.txt deleted file mode 100644 index 15f7e3a8fc..0000000000 --- a/extern/libpng/include/CMakeLists.txt +++ /dev/null @@ -1,340 +0,0 @@ -# CMakeLists.txt - -# Copyright (C) 2007-2011 Glenn Randers-Pehrson - -# This code is released under the libpng license. For conditions of distribution -# and use, see the disclaimer and license in png.h - -cmake_minimum_required(VERSION 2.4.4) -set(CMAKE_ALLOW_LOOSE_LOOP_CONSTRUCTS true) - -if(UNIX AND NOT DEFINED CMAKE_BUILD_TYPE) - if(CMAKE_MAJOR_VERSION EQUAL 2 AND CMAKE_MINOR_VERSION EQUAL 4) - # workaround CMake 2.4.x bug - set(CMAKE_BUILD_TYPE "RelWithDebInfo" - CACHE STRING "Choose the type of build, options are: - None(CMAKE_CXX_FLAGS or CMAKE_C_FLAGS used) - Debug - Release - RelWithDebInfo - MinSizeRel.") - else() - set(CMAKE_BUILD_TYPE "RelWithDebInfo" - CACHE STRING "Choose the type of build, options are: - None(CMAKE_CXX_FLAGS or CMAKE_C_FLAGS used) - Debug - Release - RelWithDebInfo - MinSizeRel.") - endif() -endif() - -project(libpng C) -enable_testing() - -set(PNGLIB_MAJOR 1) -set(PNGLIB_MINOR 5) -set(PNGLIB_RELEASE 10) -set(PNGLIB_NAME libpng${PNGLIB_MAJOR}${PNGLIB_MINOR}) -set(PNGLIB_VERSION ${PNGLIB_MAJOR}.${PNGLIB_MINOR}.${PNGLIB_RELEASE}) - -# needed packages -find_package(ZLIB REQUIRED) -include_directories(${ZLIB_INCLUDE_DIR}) - -if(NOT WIN32) - find_library(M_LIBRARY NAMES m PATHS /usr/lib /usr/local/lib) - if(NOT M_LIBRARY) - message( - STATUS "math library 'libm' not found - floating point support disabled") - endif() -else() - # not needed on windows - set(M_LIBRARY "") -endif() - -# COMMAND LINE OPTIONS -if(DEFINED PNG_SHARED) - option(PNG_SHARED "Build shared lib" ${PNG_SHARED}) -else() - option(PNG_SHARED "Build shared lib" ON) -endif() -if(DEFINED PNG_STATIC) - option(PNG_STATIC "Build static lib" ${PNG_STATIC}) -else() - option(PNG_STATIC "Build static lib" ON) -endif() - -option(PNG_TESTS "Build libpng tests" YES) - -# Many more configuration options could be added here -option(PNG_DEBUG "Build with debug output" NO) -option(PNGARG "Disable ANSI-C prototypes" NO) - -# SET LIBNAME -set(PNG_LIB_NAME png${PNGLIB_MAJOR}${PNGLIB_MINOR}) - -# to distinguish between debug and release lib -set(CMAKE_DEBUG_POSTFIX "d") - -# Use the prebuilt pnglibconf.h file from the scripts folder TODO: fix this by -# building with awk; without this no cmake build can be configured directly (to -# do so indirectly use your local awk to build a pnglibconf.h in the build -# directory.) -configure_file(${CMAKE_CURRENT_SOURCE_DIR}/scripts/pnglibconf.h.prebuilt - ${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.h) -include_directories(${CMAKE_CURRENT_BINARY_DIR}) - -# OUR SOURCES -set(libpng_public_hdrs png.h pngconf.h ${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.h) -set(libpng_sources - ${libpng_public_hdrs} - pngdebug.h - pnginfo.h - pngpriv.h - pngstruct.h - png.c - pngerror.c - pngget.c - pngmem.c - pngpread.c - pngread.c - pngrio.c - pngrtran.c - pngrutil.c - pngset.c - pngtrans.c - pngwio.c - pngwrite.c - pngwtran.c - pngwutil.c) -set(pngtest_sources pngtest.c) -set(pngvalid_sources contrib/libtests/pngvalid.c) -# SOME NEEDED DEFINITIONS - -add_definitions(-DPNG_CONFIGURE_LIBPNG) - -if(MSVC) - add_definitions(-D_CRT_SECURE_NO_DEPRECATE) -endif(MSVC) - -if(PNG_DEBUG) - add_definitions(-DPNG_DEBUG) -endif() - -# NOW BUILD OUR TARGET -include_directories(${CMAKE_CURRENT_SOURCE_DIR} ${ZLIB_INCLUDE_DIR}) - -if(PNG_SHARED) - add_library(${PNG_LIB_NAME} SHARED ${libpng_sources}) - if(MSVC) - # msvc does not append 'lib' - do it here to have consistent name - set_target_properties(${PNG_LIB_NAME} PROPERTIES PREFIX "lib") - set_target_properties(${PNG_LIB_NAME} PROPERTIES IMPORT_PREFIX "lib") - endif() - target_link_libraries(${PNG_LIB_NAME} ${ZLIB_LIBRARY} ${M_LIBRARY}) -endif() - -if(PNG_STATIC) - # does not work without changing name - set(PNG_LIB_NAME_STATIC ${PNG_LIB_NAME}_static) - add_library(${PNG_LIB_NAME_STATIC} STATIC ${libpng_sources}) - if(MSVC) - # msvc does not append 'lib' - do it here to have consistent name - set_target_properties(${PNG_LIB_NAME_STATIC} PROPERTIES PREFIX "lib") - endif() - target_link_libraries(${PNG_LIB_NAME_STATIC} ${ZLIB_LIBRARY} ${M_LIBRARY}) -endif() - -if(PNG_SHARED AND WIN32) - set_target_properties(${PNG_LIB_NAME} PROPERTIES DEFINE_SYMBOL PNG_BUILD_DLL) -endif() - -if(PNG_TESTS AND PNG_SHARED) - # does not work with msvc due to png_lib_ver issue - add_executable(pngtest ${pngtest_sources}) - target_link_libraries(pngtest ${PNG_LIB_NAME}) - add_test(pngtest ./pngtest ${CMAKE_CURRENT_SOURCE_DIR}/pngtest.png) - # - add_executable(pngvalid ${pngvalid_sources}) - target_link_libraries(pngvalid ${PNG_LIB_NAME}) - add_test(pngvalid ./pngvalid) -endif() - -# Ensure the CMAKE_LIBRARY_OUTPUT_DIRECTORY is set -if(NOT CMAKE_LIBRARY_OUTPUT_DIRECTORY) - set(CMAKE_LIBRARY_OUTPUT_DIRECTORY "lib") -endif(NOT CMAKE_LIBRARY_OUTPUT_DIRECTORY) - -# Set a variable with CMake code which: Creates a symlink from src to dest (if -# possible) or alternatively copies if different. -macro(CREATE_SYMLINK SRC_FILE DEST_FILE) - file(REMOVE ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/${DEST_FILE}) - if(WIN32 AND NOT CYGWIN AND NOT MINGW) - add_custom_command(OUTPUT ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/${DEST_FILE} - ${CMAKE_CURRENT_BINARY_DIR}/${DEST_FILE} - COMMAND ${CMAKE_COMMAND} -E copy - ${CMAKE_CURRENT_BINARY_DIR}/${SRC_FILE} - ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/${DEST_FILE} - COMMAND ${CMAKE_COMMAND} -E copy - ${CMAKE_CURRENT_BINARY_DIR}/${SRC_FILE} - ${CMAKE_CURRENT_BINARY_DIR}/${DEST_FILE} - DEPENDS ${PNG_LIB_NAME} ${PNG_LIB_NAME_STATIC}) - add_custom_target(${DEST_FILE}_COPY ALL - DEPENDS ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/${DEST_FILE}) - else(WIN32 AND NOT CYGWIN AND NOT MINGW) - execute_process(COMMAND ${CMAKE_COMMAND} -E create_symlink ${SRC_FILE} - ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/${DEST_FILE} - WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}) - execute_process(COMMAND ${CMAKE_COMMAND} -E create_symlink ${SRC_FILE} - ${DEST_FILE} - WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}) - endif(WIN32 AND NOT CYGWIN AND NOT MINGW) -endmacro() - -# libpng is a library so default to 'lib' -if(NOT DEFINED CMAKE_INSTALL_LIBDIR) - set(CMAKE_INSTALL_LIBDIR lib) -endif(NOT DEFINED CMAKE_INSTALL_LIBDIR) - -# CREATE PKGCONFIG FILES we use the same files like ./configure, so we have to -# set its vars Only do this on Windows for Cygwin - the files don't make much -# sense outside a UNIX look alike -if(NOT WIN32 OR CYGWIN OR MINGW) - set(prefix ${CMAKE_INSTALL_PREFIX}) - set(exec_prefix ${CMAKE_INSTALL_PREFIX}) - set(libdir ${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}) - set(includedir ${CMAKE_INSTALL_PREFIX}/include) - set(LIBS "-lz -lm") - configure_file(${CMAKE_CURRENT_SOURCE_DIR}/libpng.pc.in - ${CMAKE_CURRENT_BINARY_DIR}/${PNGLIB_NAME}.pc @ONLY) - create_symlink(${PNGLIB_NAME}.pc libpng.pc) - - configure_file(${CMAKE_CURRENT_SOURCE_DIR}/libpng-config.in - ${CMAKE_CURRENT_BINARY_DIR}/${PNGLIB_NAME}-config @ONLY) - create_symlink(${PNGLIB_NAME}-config libpng-config) -endif(NOT WIN32 OR CYGWIN OR MINGW) - -# SET UP LINKS -if(PNG_SHARED) - set_target_properties(${PNG_LIB_NAME} - PROPERTIES # VERSION 15.${PNGLIB_RELEASE}.1.5.10 - VERSION - 15.${PNGLIB_RELEASE}.0 - SOVERSION - 15 - CLEAN_DIRECT_OUTPUT - 1) -endif() -if(PNG_STATIC) - # MSVC doesn't use a different file extension for shared vs. static libs. We - # are able to change OUTPUT_NAME to remove the _static for all other - # platforms. - if(NOT MSVC) - set_target_properties(${PNG_LIB_NAME_STATIC} - PROPERTIES OUTPUT_NAME - ${PNG_LIB_NAME} - CLEAN_DIRECT_OUTPUT - 1) - endif() -endif() - -# If CMake > 2.4.x, we set a variable used below to export targets to an export -# file. TODO: Use VERSION_GREATER after our cmake_minimum_required >= 2.6.2 -if(CMAKE_MAJOR_VERSION GREATER 1 AND CMAKE_MINOR_VERSION GREATER 4) - set(PNG_EXPORT_RULE EXPORT libpng) -elseif(CMAKE_MAJOR_VERSION GREATER 2) # future proof - set(PNG_EXPORT_RULE EXPORT libpng) -endif() - -# INSTALL -if(NOT SKIP_INSTALL_LIBRARIES AND NOT SKIP_INSTALL_ALL) - if(PNG_SHARED) - install(TARGETS ${PNG_LIB_NAME} ${PNG_EXPORT_RULE} - RUNTIME DESTINATION bin - LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR} - ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}) - - # Create a symlink for libpng.dll.a => libpng15.dll.a on Cygwin - if(CYGWIN OR MINGW) - get_target_property(BUILD_TARGET_LOCATION ${PNG_LIB_NAME} - LOCATION_${CMAKE_BUILD_TYPE}) - get_filename_component(BUILD_TARGET_FILE ${BUILD_TARGET_LOCATION} NAME) - create_symlink(${BUILD_TARGET_FILE} libpng${CMAKE_IMPORT_LIBRARY_SUFFIX}) - install( - FILES ${CMAKE_CURRENT_BINARY_DIR}/libpng${CMAKE_IMPORT_LIBRARY_SUFFIX} - DESTINATION ${CMAKE_INSTALL_LIBDIR}) - endif(CYGWIN OR MINGW) - - if(NOT WIN32) - get_target_property(BUILD_TARGET_LOCATION ${PNG_LIB_NAME} - LOCATION_${CMAKE_BUILD_TYPE}) - get_filename_component(BUILD_TARGET_FILE ${BUILD_TARGET_LOCATION} NAME) - create_symlink(${BUILD_TARGET_FILE} libpng${CMAKE_SHARED_LIBRARY_SUFFIX}) - install( - FILES ${CMAKE_CURRENT_BINARY_DIR}/libpng${CMAKE_SHARED_LIBRARY_SUFFIX} - DESTINATION ${CMAKE_INSTALL_LIBDIR}) - endif(NOT WIN32) - endif(PNG_SHARED) - - if(PNG_STATIC) - install(TARGETS ${PNG_LIB_NAME_STATIC} ${PNG_EXPORT_RULE} - LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR} - ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}) - if(NOT WIN32 OR CYGWIN OR MINGW) - get_target_property(BUILD_TARGET_LOCATION ${PNG_LIB_NAME_STATIC} - LOCATION_${CMAKE_BUILD_TYPE}) - get_filename_component(BUILD_TARGET_FILE ${BUILD_TARGET_LOCATION} NAME) - create_symlink(${BUILD_TARGET_FILE} libpng${CMAKE_STATIC_LIBRARY_SUFFIX}) - install( - FILES ${CMAKE_CURRENT_BINARY_DIR}/libpng${CMAKE_STATIC_LIBRARY_SUFFIX} - DESTINATION ${CMAKE_INSTALL_LIBDIR}) - endif(NOT WIN32 OR CYGWIN OR MINGW) - endif() -endif() - -if(NOT SKIP_INSTALL_HEADERS AND NOT SKIP_INSTALL_ALL) - install(FILES ${libpng_public_hdrs} DESTINATION include) - install(FILES ${libpng_public_hdrs} DESTINATION include/${PNGLIB_NAME}) -endif() -if(NOT SKIP_INSTALL_EXECUTABLES AND NOT SKIP_INSTALL_ALL) - if(NOT WIN32 OR CYGWIN OR MINGW) - install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/libpng-config DESTINATION bin) - install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/${PNGLIB_NAME}-config - DESTINATION bin) - endif(NOT WIN32 OR CYGWIN OR MINGW) -endif() - -if(NOT SKIP_INSTALL_FILES AND NOT SKIP_INSTALL_ALL) - # Install man pages - if(NOT PNG_MAN_DIR) - set(PNG_MAN_DIR "share/man") - endif() - install(FILES libpng.3 libpngpf.3 DESTINATION ${PNG_MAN_DIR}/man3) - install(FILES png.5 DESTINATION ${PNG_MAN_DIR}/man5) - # Install pkg-config files - if(NOT WIN32 OR CYGWIN OR MINGW) - install(FILES ${CMAKE_CURRENT_BINARY_DIR}/libpng.pc - DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig) - install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/libpng-config DESTINATION bin) - install(FILES ${CMAKE_CURRENT_BINARY_DIR}/${PNGLIB_NAME}.pc - DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig) - install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/${PNGLIB_NAME}-config - DESTINATION bin) - endif(NOT WIN32 OR CYGWIN OR MINGW) -endif() - -# On versions of CMake that support it, create an export file CMake users can -# include() to import our targets -if(PNG_EXPORT_RULE AND NOT SKIP_INSTALL_EXPORT AND NOT SKIP_INSTALL_ALL) - install(EXPORT libpng DESTINATION lib/libpng FILE lib${PNG_LIB_NAME}.cmake) -endif() - -# what's with libpng-$VER%.txt and all the extra files? - -# UNINSTALL do we need this? - -# DIST do we need this? - -# to create msvc import lib for mingw compiled shared lib pexports libpng.dll > -# libpng.def lib /def:libpng.def /machine:x86 diff --git a/extern/libpng/include/INSTALL b/extern/libpng/include/INSTALL deleted file mode 100644 index e6979c6fb0..0000000000 --- a/extern/libpng/include/INSTALL +++ /dev/null @@ -1,155 +0,0 @@ - -Installing libpng - -On Unix/Linux and similar systems, you can simply type - - ./configure [--prefix=/path] - make check - make install - -and ignore the rest of this document. - -If configure does not work on your system and you have a reasonably -up-to-date set of tools, running ./autogen.sh before running ./configure -may fix the problem. You can also run the individual commands in -autogen.sh with the --force option, if supported by your version of -the tools. To be really sure that you aren't using any of the included -pre-built scripts, you can do this: - - ./configure --enable-maintainer-mode - make maintainer-clean - ./autogen.sh - ./configure [--prefix=/path] [other options] - make - make install - make check - -Instead, you can use one of the custom-built makefiles in the -"scripts" directory - - cp scripts/makefile.system makefile - make test - make install - -The files that are presently available in the scripts directory -are listed and described in scripts/README.txt. - -Or you can use one of the "projects" in the "projects" directory. - -Before installing libpng, you must first install zlib, if it -is not already on your system. zlib can usually be found -wherever you got libpng. zlib can be placed in another directory, -at the same level as libpng. - -If you want to use "cmake" (see www.cmake.org), type - - cmake . -DCMAKE_INSTALL_PREFIX=/path - make - make install - -If your system already has a preinstalled zlib you will still need -to have access to the zlib.h and zconf.h include files that -correspond to the version of zlib that's installed. - -You can rename the directories that you downloaded (they -might be called "libpng-x.y.z" or "libpngNN" and "zlib-1.2.5" -or "zlib125") so that you have directories called "zlib" and "libpng". - -Your directory structure should look like this: - - .. (the parent directory) - libpng (this directory) - INSTALL (this file) - README - *.h - *.c - CMakeLists.txt => "cmake" script - configuration files: - configure.ac, configure, Makefile.am, Makefile.in, - autogen.sh, config.guess, ltmain.sh, missing, libpng.pc.in, - libpng-config.in, aclocal.m4, config.h.in, config.sub, - depcomp, install-sh, mkinstalldirs, test-pngtest.sh - contrib - gregbook - pngminim - pngminus - pngsuite - visupng - projects - visualc71 - vstudio - scripts - makefile.* - *.def (module definition files) - etc. - pngtest.png - etc. - zlib - README - *.h - *.c - contrib - etc. - -If the line endings in the files look funny, you may wish to get the other -distribution of libpng. It is available in both tar.gz (UNIX style line -endings) and zip (DOS style line endings) formats. - -If you are building libpng with MSVC, you can enter the -libpng projects\visualc6 or visualc71 directory and follow the instructions -in README.txt. - -Otherwise enter the zlib directory and follow the instructions in zlib/README, -then come back here and run "configure" or choose the appropriate -makefile.sys in the scripts directory. - -Copy the file (or files) that you need from the -scripts directory into this directory, for example - - MSDOS example: copy scripts\makefile.msc makefile - UNIX example: cp scripts/makefile.std makefile - -Read the makefile to see if you need to change any source or -target directories to match your preferences. - -Then read pnglibconf.dfa to see if you want to make any configuration -changes. - -Then just run "make" which will create the libpng library in -this directory and "make test" which will run a quick test that reads -the "pngtest.png" file and writes a "pngout.png" file that should be -identical to it. Look for "9782 zero samples" in the output of the -test. For more confidence, you can run another test by typing -"pngtest pngnow.png" and looking for "289 zero samples" in the output. -Also, you can run "pngtest -m contrib/pngsuite/*.png" and compare -your output with the result shown in contrib/pngsuite/README. - -Most of the makefiles will allow you to run "make install" to -put the library in its final resting place (if you want to -do that, run "make install" in the zlib directory first if necessary). -Some also allow you to run "make test-installed" after you have -run "make install". - -Further information can be found in the README and libpng-manual.txt -files, in the individual makefiles, in png.h, and the manual pages -libpng.3 and png.5. - -Using the ./configure script -- 16 December 2002. -================================================= - -The ./configure script should work compatibly with what scripts/makefile.* -did, however there are some options you might need to add to configure -explicitly, which previously was done semi-automatically (if you didn't edit -scripts/makefile.* yourself, that is) - -CFLAGS="-Wall -O -funroll-loops \ --malign-loops=2 -malign-functions=2" ./configure --prefix=/usr/include \ ---with-pkgconfigdir=/usr/lib/pkgconfig --includedir=/usr/include - -You can alternatively specify --includedir=/usr/include, /usr/local/include, -/usr/include/libpng%NN%, or whatever. - -If you find that the configure script is out-of-date or is not supporting -your platform properly, try running autogen.sh to regenerate "configure", -"Makefile.in", and the other configuration files. Then try configure again. - diff --git a/extern/libpng/include/LICENSE b/extern/libpng/include/LICENSE deleted file mode 100644 index b72d1258e3..0000000000 --- a/extern/libpng/include/LICENSE +++ /dev/null @@ -1,111 +0,0 @@ - -This copy of the libpng notices is provided for your convenience. In case of -any discrepancy between this copy and the notices in the file png.h that is -included in the libpng distribution, the latter shall prevail. - -COPYRIGHT NOTICE, DISCLAIMER, and LICENSE: - -If you modify libpng you may insert additional notices immediately following -this sentence. - -This code is released under the libpng license. - -libpng versions 1.2.6, August 15, 2004, through 1.5.10, March 29, 2012, are -Copyright (c) 2004, 2006-2011 Glenn Randers-Pehrson, and are -distributed according to the same disclaimer and license as libpng-1.2.5 -with the following individual added to the list of Contributing Authors - - Cosmin Truta - -libpng versions 1.0.7, July 1, 2000, through 1.2.5 - October 3, 2002, are -Copyright (c) 2000-2002 Glenn Randers-Pehrson, and are -distributed according to the same disclaimer and license as libpng-1.0.6 -with the following individuals added to the list of Contributing Authors - - Simon-Pierre Cadieux - Eric S. Raymond - Gilles Vollant - -and with the following additions to the disclaimer: - - There is no warranty against interference with your enjoyment of the - library or against infringement. There is no warranty that our - efforts or the library will fulfill any of your particular purposes - or needs. This library is provided with all faults, and the entire - risk of satisfactory quality, performance, accuracy, and effort is with - the user. - -libpng versions 0.97, January 1998, through 1.0.6, March 20, 2000, are -Copyright (c) 1998, 1999 Glenn Randers-Pehrson, and are -distributed according to the same disclaimer and license as libpng-0.96, -with the following individuals added to the list of Contributing Authors: - - Tom Lane - Glenn Randers-Pehrson - Willem van Schaik - -libpng versions 0.89, June 1996, through 0.96, May 1997, are -Copyright (c) 1996, 1997 Andreas Dilger -Distributed according to the same disclaimer and license as libpng-0.88, -with the following individuals added to the list of Contributing Authors: - - John Bowler - Kevin Bracey - Sam Bushell - Magnus Holmgren - Greg Roelofs - Tom Tanner - -libpng versions 0.5, May 1995, through 0.88, January 1996, are -Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc. - -For the purposes of this copyright and license, "Contributing Authors" -is defined as the following set of individuals: - - Andreas Dilger - Dave Martindale - Guy Eric Schalnat - Paul Schmidt - Tim Wegner - -The PNG Reference Library is supplied "AS IS". The Contributing Authors -and Group 42, Inc. disclaim all warranties, expressed or implied, -including, without limitation, the warranties of merchantability and of -fitness for any purpose. The Contributing Authors and Group 42, Inc. -assume no liability for direct, indirect, incidental, special, exemplary, -or consequential damages, which may result from the use of the PNG -Reference Library, even if advised of the possibility of such damage. - -Permission is hereby granted to use, copy, modify, and distribute this -source code, or portions hereof, for any purpose, without fee, subject -to the following restrictions: - -1. The origin of this source code must not be misrepresented. - -2. Altered versions must be plainly marked as such and must not - be misrepresented as being the original source. - -3. This Copyright notice may not be removed or altered from any - source or altered source distribution. - -The Contributing Authors and Group 42, Inc. specifically permit, without -fee, and encourage the use of this source code as a component to -supporting the PNG file format in commercial products. If you use this -source code in a product, acknowledgment is not required but would be -appreciated. - - -A "png_get_copyright" function is available, for convenient use in "about" -boxes and the like: - - printf("%s",png_get_copyright(NULL)); - -Also, the PNG logo (in PNG format, of course) is supplied in the -files "pngbar.png" and "pngbar.jpg (88x31) and "pngnow.png" (98x31). - -Libpng is OSI Certified Open Source Software. OSI Certified Open Source is a -certification mark of the Open Source Initiative. - -Glenn Randers-Pehrson -glennrp at users.sourceforge.net -March 29, 2012 diff --git a/extern/libpng/include/Makefile.am b/extern/libpng/include/Makefile.am deleted file mode 100644 index 19652c4bda..0000000000 --- a/extern/libpng/include/Makefile.am +++ /dev/null @@ -1,228 +0,0 @@ -# Makefile.am: -# Source file for Makefile.in (and hence Makefile) -# - -PNGLIB_BASENAME= libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@ - -# libpng does not follow GNU file name conventions - -# "color-tests" requires automake 1.11.1 or later. Enable it if you like, -# to get red "FAIL" and green "PASS" notations during tests. -# AUTOMAKE_OPTIONS = foreign color-tests -AUTOMAKE_OPTIONS = foreign - -# test programs - run on make check, make distcheck -TESTS_ENVIRONMENT= srcdir=$(srcdir) -check_PROGRAMS= pngtest -pngtest_SOURCES = pngtest.c -pngtest_LDADD = libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.la -TESTS = test-pngtest.sh - -# Only do the following if the contrib directory is present. -check_PROGRAMS+= pngvalid -pngvalid_SOURCES = contrib/libtests/pngvalid.c -pngvalid_LDADD = libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.la -TESTS += test-pngvalid-simple.sh test-pngvalid-full.sh - -# man pages -dist_man_MANS= libpng.3 libpngpf.3 png.5 - -# generate the -config scripts if required -binconfigs= libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@-config -EXTRA_SCRIPTS= libpng-config libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@-config -bin_SCRIPTS= @binconfigs@ - -# rules to build libpng, only build the old library on request -lib_LTLIBRARIES=libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.la -# EXTRA_LTLIBRARIES= libpng.la -libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_SOURCES = png.c pngerror.c\ - pngget.c pngmem.c pngpread.c pngread.c pngrio.c pngrtran.c pngrutil.c\ - pngset.c pngtrans.c pngwio.c pngwrite.c pngwtran.c pngwutil.c\ - png.h pngconf.h pngdebug.h pnginfo.h pngpriv.h pngstruct.h pngusr.dfa - -if PNG_ARM_NEON -libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_SOURCES += arm/filter_neon.S -endif - -nodist_libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_SOURCES = pnglibconf.h - -libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_CPPFLAGS = @LIBPNG_DEFINES@ - -libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_LDFLAGS = -no-undefined -export-dynamic \ - -version-number @PNGLIB_MAJOR@@PNGLIB_MINOR@:@PNGLIB_RELEASE@:0 - -if HAVE_LD_VERSION_SCRIPT -# Versioned symbols and restricted exports -if HAVE_SOLARIS_LD - libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_LDFLAGS += -Wl,-M -Wl,libpng.vers -else - libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_LDFLAGS += -Wl,--version-script=libpng.vers -endif - - libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_DEPENDENCIES = libpng.vers -else -# Only restricted exports when possible - libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_LDFLAGS += -export-symbols libpng.sym - libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_DEPENDENCIES = libpng.sym -endif - -#distribute headers in /usr/include/libpng/* -pkgincludedir= $(includedir)/$(PNGLIB_BASENAME) -pkginclude_HEADERS= png.h pngconf.h -nodist_pkginclude_HEADERS= pnglibconf.h - -# pkg-config stuff, note that libpng.pc is always required in order -# to get the correct library -pkgconfigdir = @pkgconfigdir@ -pkgconfig_DATA = libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.pc - -#extra source distribution files. -EXTRA_DIST= \ - ANNOUNCE CHANGES INSTALL LICENSE README TODO \ - pngtest.png pngbar.png pngnow.png pngbar.jpg autogen.sh \ - ${srcdir}/contrib ${srcdir}/projects ${srcdir}/scripts \ - $(TESTS) \ - CMakeLists.txt example.c libpng-manual.txt - -SCRIPT_CLEANFILES=scripts/*.out scripts/*.chk scripts/pnglibconf.dfn - -CLEANFILES= dfn.c dfn?.out pngout.png libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.pc \ - libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@-config libpng.vers libpng.sym \ - check.new pnglibconf.* symbols.new pngtest-log.txt \ - $(SCRIPT_CLEANFILES) - -MAINTAINERCLEANFILES = Makefile.in aclocal.m4 config.guess config.h.in \ -config.sub configure depcomp install-sh ltmain.sh missing - -# DFNCPP is normally just CPP - the C preprocessor - but on Solaris and maybe -# other operating systems (NeXT?) the C preprocessor selected by configure -# checks input tokens for validity - effectively it performs part of the ANSI-C -# parsing - and therefore fails with the .df files. configure.ac has special -# checks for this and sets DFNCPP appropriately. -DFNCPP = @DFNCPP@ - -SUFFIXES = .chk .dfn .out - -$(PNGLIB_BASENAME).pc: libpng.pc - cp libpng.pc $@ - -$(PNGLIB_BASENAME)-config: libpng-config - cp libpng-config $@ - -scripts/sym.out scripts/vers.out: png.h pngconf.h pnglibconf.h -scripts/symbols.out: png.h pngconf.h $(srcdir)/scripts/pnglibconf.h.prebuilt - -libpng.sym: scripts/sym.out - rm -f $@ - cp $? $@ -libpng.vers: scripts/vers.out - rm -f $@ - cp $? $@ -pnglibconf.h: pnglibconf.out - rm -f $@ - cp $? $@ -$(srcdir)/scripts/pnglibconf.h.prebuilt: - @echo "Attempting to build $@" >&2 - @echo "This is a machine generated file, but if you want to make" >&2 - @echo "a new one simply make 'scripts/pnglibconf.out' and copy that" >&2 - @exit 1 - -# The following is necessary to ensure that the local pnglibconf.h is used, not -# an installed one (this can happen immediately after on a clean system if -# 'make test' is the first thing the user does.) -contrib/libtests/pngvalid.o pngtest.o: pnglibconf.h - -# We must use -DPNG_NO_USE_READ_MACROS here even when the library may actually -# be built with PNG_USE_READ_MACROS; this prevents the read macros from -# interfering with the symbol file format. -SYMBOL_CFLAGS = -DPNGLIB_LIBNAME='PNG@PNGLIB_MAJOR@@PNGLIB_MINOR@_0'\ - -DPNGLIB_VERSION='@PNGLIB_VERSION@'\ - -DSYMBOL_PREFIX='$(SYMBOL_PREFIX)'\ - -DPNG_NO_USE_READ_MACROS -DPNG_BUILDING_SYMBOL_TABLE - -.dfn.out: - rm -f $@ dfn.c dfn?.out - test -d scripts || mkdir scripts - echo '#include "$<"' >dfn.c - $(DFNCPP) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) @LIBPNG_DEFINES@\ - $(CPPFLAGS) $(SYMBOL_CFLAGS) dfn.c > dfn1.out - $(SED) -n -e 's|^.*PNG_DEFN_MAGIC *-\(.*\)- *PNG_DEFN_END.*$$|\1|p'\ - dfn1.out >dfn2.out - $(SED) -e 's| *PNG_JOIN *||g' -e 's| *$$||' dfn2.out >dfn3.out - rm -f dfn.c dfn[12].out - mv dfn3.out $@ - -# The .dfn file for pnglibconf.h is machine generated -pnglibconf.dfn: scripts/pnglibconf.dfa scripts/options.awk pngconf.h pngusr.dfa $(DFA_XTRA) - rm -f $@ dfn?.out - $(AWK) -f ${srcdir}/scripts/options.awk out=dfn1.out version=search\ - ${srcdir}/pngconf.h ${srcdir}/scripts/pnglibconf.dfa\ - ${srcdir}/pngusr.dfa $(DFA_XTRA) 1>&2 - $(AWK) -f ${srcdir}/scripts/options.awk out=dfn2.out dfn1.out 1>&2 - rm dfn1.out - mv dfn2.out $@ - -# Symbol checks (.def and .out files should match) -scripts/symbols.chk: scripts/checksym.awk scripts/symbols.def scripts/symbols.out -.out.chk: - rm -f $@ symbols.new - $(AWK) -f ${srcdir}/scripts/checksym.awk ${srcdir}/scripts/${*F}.def\ - $< >&2 - mv symbols.new $@ - -# used on demand to regenerate the standard header, CPPFLAGS should -# be empty - no non-standard defines -scripts/pnglibconf.dfn: scripts/pnglibconf.dfa scripts/options.awk pngconf.h - rm -f $@ dfn?.out - test -z "$(CPPFLAGS)" - echo "com @PNGLIB_VERSION@ STANDARD API DEFINITION" |\ - $(AWK) -f ${srcdir}/scripts/options.awk out=dfn1.out logunsupported=1 - version=search ${srcdir}/pngconf.h -\ - ${srcdir}/scripts/pnglibconf.dfa 1>&2 - $(AWK) -f ${srcdir}/scripts/options.awk out=dfn2.out dfn1.out 1>&2 - rm dfn1.out - mv dfn2.out $@ - -$(libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_OBJECTS): png.h pngconf.h \ - pnglibconf.h pngpriv.h pngdebug.h pnginfo.h pngstruct.h - -test: check-am - -# Extra checks -check: scripts/symbols.chk - -# Don't distribute the generated script files -dist-hook: - cd '$(top_distdir)'; rm -f $(SCRIPT_CLEANFILES) - -# install the .../include headers as links to the new ones -install-data-hook: - cd $(DESTDIR)$(includedir); rm -f png.h pngconf.h pnglibconf.h - cd $(DESTDIR)$(includedir); $(LN_S) $(PNGLIB_BASENAME)/png.h png.h - cd $(DESTDIR)$(includedir); $(LN_S) $(PNGLIB_BASENAME)/pngconf.h \ - pngconf.h - cd $(DESTDIR)$(includedir); $(LN_S) $(PNGLIB_BASENAME)/pnglibconf.h \ - pnglibconf.h - cd $(DESTDIR)$(pkgconfigdir); rm -f libpng.pc - cd $(DESTDIR)$(pkgconfigdir); $(LN_S) $(PNGLIB_BASENAME).pc libpng.pc - -# do evil things to libpng to cause libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@ to be used -install-exec-hook: - cd $(DESTDIR)$(bindir); rm -f libpng-config - cd $(DESTDIR)$(bindir); $(LN_S) $(PNGLIB_BASENAME)-config libpng-config - @set -x;\ - cd $(DESTDIR)$(libdir);\ - for ext in a la so so.@PNGLIB_MAJOR@@PNGLIB_MINOR@.@PNGLIB_RELEASE@ sl dylib dll.a; do\ - rm -f libpng.$$ext;\ - if test -f $(PNGLIB_BASENAME).$$ext; then\ - $(LN_S) $(PNGLIB_BASENAME).$$ext libpng.$$ext;\ - fi;\ - done - -uninstall-hook: - cd $(DESTDIR)$(includedir); rm -f png.h pngconf.h pnglibconf.h - rm -f $(DESTDIR)$(pkgconfigdir)/libpng.pc - rm -f $(DESTDIR)$(bindir)/libpng-config - rm -f $(DESTDIR)$(libdir)/libpng.a - rm -f $(DESTDIR)$(libdir)/libpng.la - rm -f $(DESTDIR)$(libdir)/libpng.dll.a diff --git a/extern/libpng/include/TODO b/extern/libpng/include/TODO deleted file mode 100644 index 6e1f028bd7..0000000000 --- a/extern/libpng/include/TODO +++ /dev/null @@ -1,27 +0,0 @@ -/* -TODO - list of things to do for libpng: - -Final bug fixes. -Better C++ wrapper/full C++ implementation? -Fix problem with C++ and EXTERN "C". -cHRM transformation. -Remove setjmp/longjmp usage in favor of returning error codes. -Add "grayscale->palette" transformation and "palette->grayscale" detection. -Improved dithering. -Multi-lingual error and warning message support. -Complete sRGB transformation (presently it simply uses gamma=0.45455). -Man pages for function calls. -Better documentation. -Better filter selection - (counting huffman bits/precompression? filter inertia? filter costs?). -Histogram creation. -Text conversion between different code pages (Latin-1 -> Mac and DOS). -Avoid building gamma tables whenever possible. -Use greater precision when changing to linear gamma for compositing against - background and doing rgb-to-gray transformation. -Investigate pre-incremented loop counters and other loop constructions. -Add interpolated method of handling interlacing. -Switch to the simpler zlib (zlib/libpng) license if legally possible. -Extend pngvalid.c to validate more of the libpng transformations. - -*/ diff --git a/extern/libpng/include/autogen.sh b/extern/libpng/include/autogen.sh deleted file mode 100755 index 5be104eb1d..0000000000 --- a/extern/libpng/include/autogen.sh +++ /dev/null @@ -1,34 +0,0 @@ -#! /bin/sh -# a quick hack script to generate necessary files from -# auto* tools. -# -# WARNING: if you run this you will change the versions -# of the tools which are used and, maybe, required! - -# You can define your own replacements in your environment. -# $AUTOCONF, $AUTOMAKE, $AUTOHEADER, $AUTOPOINT, $ACLOCAL and $LIBTOOLIZE - -touch Makefile.am configure.ac -{ - LT=${LIBTOOLIZE-libtoolize} - echo "running $LT" >&2 - $LT --force --copy --automake -} && { - AL=${ACLOCAL-aclocal} - echo "running $AL" >&2 - $AL -} && { - AH=${AUTOHEADER-autoheader} - echo "running $AH [ignore the warnings]" >&2 - $AH -} && { - AM=${AUTOMAKE-automake} - echo "running $AM" >&2 - $AM --force-missing --foreign -a -c -} && { - AC=${AUTOCONF-autoconf} - echo "running $AC" >&2 - $AC -} && - echo "autogen complete" >&2 || - echo "ERROR: autogen.sh failed, autogen is incomplete" >&2 diff --git a/extern/libpng/include/configure.ac b/extern/libpng/include/configure.ac deleted file mode 100644 index 023aba43b3..0000000000 --- a/extern/libpng/include/configure.ac +++ /dev/null @@ -1,204 +0,0 @@ -# configure.ac - -dnl Process this file with autoconf to produce a configure script. -dnl -dnl Minor upgrades (compatible ABI): increment the package version -dnl (third field in two places below) and set the PNGLIB_RELEASE -dnl variable. -dnl -dnl Major upgrades (incompatible ABI): increment the package major -dnl version (second field, or first if desired), set the minor -dnl to 0, set PNGLIB_MAJOR below *and* follow the instructions in -dnl Makefile.am to upgrade the package name. - -dnl This is here to prevent earlier autoconf from being used, it -dnl should not be necessary to regenerate configure if the time -dnl stamps are correct -AC_PREREQ(2.59) - -dnl Version number stuff here: - -AC_INIT([libpng], [1.5.10], [png-mng-implement@lists.sourceforge.net]) -AM_INIT_AUTOMAKE -dnl stop configure from automagically running automake -AM_MAINTAINER_MODE - -PNGLIB_VERSION=1.5.10 -PNGLIB_MAJOR=1 -PNGLIB_MINOR=5 -PNGLIB_RELEASE=10 - -dnl End of version number stuff - -AC_CONFIG_SRCDIR([pngget.c]) -AM_CONFIG_HEADER(config.h) - -# Checks for programs. -AC_LANG([C]) -AC_PROG_CC -AM_PROG_AS -AC_PROG_LD -AC_PROG_CPP -AC_CHECK_TOOL(SED, sed, :) -AC_CHECK_TOOL(AWK, awk, :) -AC_PROG_INSTALL -AC_PROG_LN_S -AC_PROG_MAKE_SET -LT_INIT([win32-dll]) - -# On Solaris 10 and 12 CPP gets set to cc -E, however this still -# does some input parsing. We need strict ANSI-C style tokenization, -# check this: -AC_REQUIRE_CPP -AC_MSG_CHECKING([for a C preprocessor that does not parse its input]) -AC_TRY_CPP([1.5.0 16BIT], - [DFNCPP="$CPP"], - [DFNCPP="" - sav_CPP="$CPP" - for CPP in "${CC-cc} -E" "${CC-cc} -E -traditional-cpp" "/lib/cpp" "cpp"; do - AC_TRY_CPP([1.5.0 16BIT], - [DFNCPP="$CPP"] - [break],,) - done - CPP="$sav_CPP"]) -if test -n "$DFNCPP"; then - AC_MSG_RESULT([$DFNCPP]) - AC_SUBST(DFNCPP) -else - AC_MSG_FAILURE([not found], 1) -fi - -# Checks for header files. -AC_HEADER_STDC -AC_CHECK_HEADERS([malloc.h stdlib.h string.h strings.h]) - -# Checks for typedefs, structures, and compiler characteristics. -AC_C_CONST -AC_TYPE_SIZE_T -AC_STRUCT_TM -AC_C_RESTRICT - -# Checks for library functions. -AC_FUNC_STRTOD -AC_CHECK_FUNCS([memset], , AC_ERROR([memset not found in libc])) -AC_CHECK_FUNCS([pow], , AC_CHECK_LIB(m, pow, , AC_ERROR([cannot find pow])) ) -AC_ARG_WITH(zlib-prefix, - AC_HELP_STRING([--with-zlib-prefix], - [prefix that may have been used in installed zlib]), - [ZPREFIX=${withval}], - [ZPREFIX='z_']) -AC_CHECK_LIB(z, zlibVersion, , - AC_CHECK_LIB(z, ${ZPREFIX}zlibVersion, , - AC_ERROR([zlib not installed]))) - -# The following is for pngvalid, to ensure it catches FP errors even on -# platforms that don't enable FP exceptions, the function appears in the math -# library (typically), it's not an error if it is not found. -AC_CHECK_LIB([m], [feenableexcept]) -AC_CHECK_FUNCS([feenableexcept]) - -LIBPNG_DEFINES=-DPNG_CONFIGURE_LIBPNG -LIBPNG_DEFINES=$LIBPNG_DEFINES -AC_SUBST(LIBPNG_DEFINES) - -AC_MSG_CHECKING([if using Solaris linker]) -SLD=`$LD --version 2>&1 | grep Solaris` -if test "$SLD"; then - have_solaris_ld=yes - AC_MSG_RESULT(yes) -else - have_solaris_ld=no - AC_MSG_RESULT(no) -fi -AM_CONDITIONAL(HAVE_SOLARIS_LD, test "$have_solaris_ld" = "yes") - -AC_MSG_CHECKING([if libraries can be versioned]) -# Special case for PE/COFF platforms: ld reports -# support for version-script, but doesn't actually -# DO anything with it. -case $host in -*cygwin* | *mingw32* | *interix* ) - have_ld_version_script=no - AC_MSG_RESULT(no) -;; -* ) - -if test "$have_solaris_ld" = "yes"; then - GLD=`$LD --help < /dev/null 2>&1 | grep 'M mapfile'` -else - GLD=`$LD --help < /dev/null 2>/dev/null | grep version-script` -fi - -if test "$GLD"; then - have_ld_version_script=yes - AC_MSG_RESULT(yes) -else - have_ld_version_script=no - AC_MSG_RESULT(no) - AC_MSG_WARN(*** You have not enabled versioned symbols.) -fi -;; -esac - -AM_CONDITIONAL(HAVE_LD_VERSION_SCRIPT, test "$have_ld_version_script" = "yes") - -if test "$have_ld_version_script" = "yes"; then - AC_MSG_CHECKING([for symbol prefix]) - SYMBOL_PREFIX=`echo "PREFIX=__USER_LABEL_PREFIX__" \ - | ${CPP-${CC-gcc} -E} - 2>&1 \ - | ${EGREP-grep} "^PREFIX=" \ - | ${SED-sed} "s:^PREFIX=::"` - AC_SUBST(SYMBOL_PREFIX) - AC_MSG_RESULT($SYMBOL_PREFIX) -fi - -# Substitutions for .in files -AC_SUBST(PNGLIB_VERSION) -AC_SUBST(PNGLIB_MAJOR) -AC_SUBST(PNGLIB_MINOR) -AC_SUBST(PNGLIB_RELEASE) - -# Additional arguments (and substitutions) -# Allow the pkg-config directory to be set -AC_ARG_WITH(pkgconfigdir, - AC_HELP_STRING([--with-pkgconfigdir], - [Use the specified pkgconfig dir (default is libdir/pkgconfig)]), - [pkgconfigdir=${withval}], - [pkgconfigdir='${libdir}/pkgconfig']) - -AC_SUBST([pkgconfigdir]) -AC_MSG_NOTICE([pkgconfig directory is ${pkgconfigdir}]) - -# Make the *-config binary config scripts optional -AC_ARG_WITH(binconfigs, - AC_HELP_STRING([--with-binconfigs], - [Generate shell libpng-config scripts as well as pkg-config data] - [@<:@default=yes@:>@]), - [if test "${withval}" = no; then - binconfigs= - AC_MSG_NOTICE([libpng-config scripts will not be built]) - else - binconfigs='${binconfigs}' - fi], - [binconfigs='${binconfigs}']) -AC_SUBST([binconfigs]) - -# Because GCC by default assembles code with an executable stack, even though it -# compiles C code with a non-executable stack, it is necessary to do a fixup -# here (this may by GCC specific) -AC_SUBST([AM_CCASFLAGS], [-Wa,--noexecstack]) - -AC_ARG_ENABLE([arm-neon], - AC_HELP_STRING([--enable-arm-neon], [Enable ARM NEON optimizations]), - [if test "${enableval}" = yes; then - AC_DEFINE([PNG_ARM_NEON], [1], [Enable ARM NEON optimizations]) - AC_DEFINE([PNG_ALIGNED_MEMORY_SUPPORTED], [1], [Align row buffers]) - fi]) -AM_CONDITIONAL([PNG_ARM_NEON], [test "${enable_arm_neon:-no}" = yes]) - -# Config files, substituting as above -AC_CONFIG_FILES([Makefile libpng.pc:libpng.pc.in]) -AC_CONFIG_FILES([libpng-config:libpng-config.in], - [chmod +x libpng-config]) - -AC_OUTPUT diff --git a/extern/libpng/include/contrib/pngminus/makefile.std b/extern/libpng/include/contrib/pngminus/makefile.std deleted file mode 100644 index fa7b5909fc..0000000000 --- a/extern/libpng/include/contrib/pngminus/makefile.std +++ /dev/null @@ -1,65 +0,0 @@ -# Makefile for PngMinus (png2pnm and pnm2png) -# Linux / Unix - -#CC=cc -CC=gcc -LD=$(CC) - -RM=rm -f - -#PNGPATH = /usr/local -#PNGINC = -I$(PNGPATH)/include/libpng15 -#PNGLIB = -L$(PNGPATH)/lib -lpng15 -#PNGLIBS = $(PNGPATH)/lib/libpng15.a -PNGINC = -I../.. -PNGLIB = -L../.. -lpng -PNGLIBS = ../../libpng.a - -#ZPATH = /usr/local -#ZINC = -I$(ZPATH)/include -#ZLIB = -L$(ZPATH)/lib -lz -#ZLIBS = $(ZPATH)/lib/libz.a -ZINC = -I../../../zlib -ZLIB = -L../../../zlib -lz -ZLIBS = ../../../zlib/libz.a - -CFLAGS=$(PNGINC) $(ZINC) -LDLIBS=$(PNGLIB) $(ZLIB) -LDLIBSS=$(PNGLIBS) $(ZLIBS) -C=.c -O=.o -L=.a -E= - -# dependencies - -#all: png2pnm$(E) pnm2png$(E) -all: png2pnm$(E) pnm2png$(E) png2pnm-static$(E) pnm2png-static$(E) - -png2pnm$(O): png2pnm$(C) - $(CC) -c $(CFLAGS) png2pnm$(C) - -png2pnm$(E): png2pnm$(O) - $(LD) $(LDFLAGS) -o png2pnm$(E) png2pnm$(O) $(LDLIBS) -lm - -png2pnm-static$(E): png2pnm$(O) - $(LD) $(LDFLAGS) -o png2pnm-static$(E) png2pnm$(O) $(LDLIBSS) -lm - -pnm2png$(O): pnm2png$(C) - $(CC) -c $(CFLAGS) pnm2png$(C) - -pnm2png$(E): pnm2png$(O) - $(LD) $(LDFLAGS) -o pnm2png$(E) pnm2png$(O) $(LDLIBS) -lm - -pnm2png-static$(E): pnm2png$(O) - $(LD) $(LDFLAGS) -o pnm2png-static$(E) pnm2png$(O) $(LDLIBSS) -lm - -clean: - $(RM) png2pnm$(O) - $(RM) pnm2png$(O) - $(RM) png2pnm$(E) - $(RM) pnm2png$(E) - $(RM) png2pnm-static$(E) - $(RM) pnm2png-static$(E) - -# End of makefile for png2pnm / pnm2png diff --git a/extern/libpng/include/contrib/pngminus/makefile.tc3 b/extern/libpng/include/contrib/pngminus/makefile.tc3 deleted file mode 100644 index 404f18d5b1..0000000000 --- a/extern/libpng/include/contrib/pngminus/makefile.tc3 +++ /dev/null @@ -1,38 +0,0 @@ -# Makefile for PngMinus (png2pnm and pnm2png) -# TurboC++ 3.0 - -CC=tcc -Ic:\tc3\inc -LD=tcc -Lc:\tc3\lib -LB=tlib -RM=del -CP=copy -MODEL=l -CCFLAGS=-O -m$(MODEL) -I..\libpng -I..\zlib -LDFLAGS=-m$(MODEL) -L..\libpng -L..\zlib -C=.c -O=.obj -L=.lib -E=.exe - -# dependencies - -all: png2pnm$(E) pnm2png$(E) - -png2pnm$(O): png2pnm$(C) - $(CC) -c $(CCFLAGS) png2pnm$(C) - -png2pnm$(E): png2pnm$(O) - $(LD) $(LDFLAGS) png2pnm$(O) libpng$(L) zlib$(L) - -pnm2png$(O): pnm2png$(C) - $(CC) -c $(CCFLAGS) pnm2png$(C) - -pnm2png$(E): pnm2png$(O) - $(LD) $(LDFLAGS) pnm2png$(O) libpng$(L) zlib$(L) - -clean: - $(RM) *$(O) - $(RM) *$(E) - -# End of makefile for png2pnm / pnm2png - diff --git a/extern/libpng/include/contrib/pngminus/pnm2png.c b/extern/libpng/include/contrib/pngminus/pnm2png.c deleted file mode 100644 index 4cdfad8313..0000000000 --- a/extern/libpng/include/contrib/pngminus/pnm2png.c +++ /dev/null @@ -1,533 +0,0 @@ -/* - * pnm2png.c --- conversion from PBM/PGM/PPM-file to PNG-file - * copyright (C) 1999 by Willem van Schaik - * - * version 1.0 - 1999.10.15 - First version. - * - * Permission to use, copy, modify, and distribute this software and - * its documentation for any purpose and without fee is hereby granted, - * provided that the above copyright notice appear in all copies and - * that both that copyright notice and this permission notice appear in - * supporting documentation. This software is provided "as is" without - * express or implied warranty. - */ - -#include -#include -#ifdef __TURBOC__ -#include -#include -#endif - -#ifndef BOOL -#define BOOL unsigned char -#endif -#ifndef TRUE -#define TRUE (BOOL) 1 -#endif -#ifndef FALSE -#define FALSE (BOOL) 0 -#endif - -#define STDIN 0 -#define STDOUT 1 -#define STDERR 2 - -/* to make pnm2png verbose so we can find problems (needs to be before png.h) */ -#ifndef PNG_DEBUG -#define PNG_DEBUG 0 -#endif - -#include "png.h" - -/* Define png_jmpbuf() in case we are using a pre-1.0.6 version of libpng */ -#ifndef png_jmpbuf -# define png_jmpbuf(png_ptr) ((png_ptr)->jmpbuf) -#endif - -/* function prototypes */ - -int main (int argc, char *argv[]); -void usage (); -BOOL pnm2png (FILE *pnm_file, FILE *png_file, FILE *alpha_file, BOOL interlace, BOOL alpha); -void get_token(FILE *pnm_file, char *token); -png_uint_32 get_data (FILE *pnm_file, int depth); -png_uint_32 get_value (FILE *pnm_file, int depth); - -/* - * main - */ - -int main(int argc, char *argv[]) -{ - FILE *fp_rd = stdin; - FILE *fp_al = NULL; - FILE *fp_wr = stdout; - BOOL interlace = FALSE; - BOOL alpha = FALSE; - int argi; - - for (argi = 1; argi < argc; argi++) - { - if (argv[argi][0] == '-') - { - switch (argv[argi][1]) - { - case 'i': - interlace = TRUE; - break; - case 'a': - alpha = TRUE; - argi++; - if ((fp_al = fopen (argv[argi], "rb")) == NULL) - { - fprintf (stderr, "PNM2PNG\n"); - fprintf (stderr, "Error: alpha-channel file %s does not exist\n", - argv[argi]); - exit (1); - } - break; - case 'h': - case '?': - usage(); - exit(0); - break; - default: - fprintf (stderr, "PNM2PNG\n"); - fprintf (stderr, "Error: unknown option %s\n", argv[argi]); - usage(); - exit(1); - break; - } /* end switch */ - } - else if (fp_rd == stdin) - { - if ((fp_rd = fopen (argv[argi], "rb")) == NULL) - { - fprintf (stderr, "PNM2PNG\n"); - fprintf (stderr, "Error: file %s does not exist\n", argv[argi]); - exit (1); - } - } - else if (fp_wr == stdout) - { - if ((fp_wr = fopen (argv[argi], "wb")) == NULL) - { - fprintf (stderr, "PNM2PNG\n"); - fprintf (stderr, "Error: can not create PNG-file %s\n", argv[argi]); - exit (1); - } - } - else - { - fprintf (stderr, "PNM2PNG\n"); - fprintf (stderr, "Error: too many parameters\n"); - usage(); - exit (1); - } - } /* end for */ - -#ifdef __TURBOC__ - /* set stdin/stdout to binary, we're reading the PNM always! in binary format */ - if (fp_rd == stdin) - { - setmode (STDIN, O_BINARY); - } - if (fp_wr == stdout) - { - setmode (STDOUT, O_BINARY); - } -#endif - - /* call the conversion program itself */ - if (pnm2png (fp_rd, fp_wr, fp_al, interlace, alpha) == FALSE) - { - fprintf (stderr, "PNM2PNG\n"); - fprintf (stderr, "Error: unsuccessful converting to PNG-image\n"); - exit (1); - } - - /* close input file */ - fclose (fp_rd); - /* close output file */ - fclose (fp_wr); - /* close alpha file */ - if (alpha) - fclose (fp_al); - - return 0; -} - -/* - * usage - */ - -void usage() -{ - fprintf (stderr, "PNM2PNG\n"); - fprintf (stderr, " by Willem van Schaik, 1999\n"); -#ifdef __TURBOC__ - fprintf (stderr, " for Turbo-C and Borland-C compilers\n"); -#else - fprintf (stderr, " for Linux (and Unix) compilers\n"); -#endif - fprintf (stderr, "Usage: pnm2png [options] . [.png]\n"); - fprintf (stderr, " or: ... | pnm2png [options]\n"); - fprintf (stderr, "Options:\n"); - fprintf (stderr, " -i[nterlace] write png-file with interlacing on\n"); - fprintf (stderr, " -a[lpha] .pgm read PNG alpha channel as pgm-file\n"); - fprintf (stderr, " -h | -? print this help-information\n"); -} - -/* - * pnm2png - */ - -BOOL pnm2png (FILE *pnm_file, FILE *png_file, FILE *alpha_file, BOOL interlace, BOOL alpha) -{ - png_struct *png_ptr = NULL; - png_info *info_ptr = NULL; - png_byte *png_pixels = NULL; - png_byte **row_pointers = NULL; - png_byte *pix_ptr = NULL; - png_uint_32 row_bytes; - - char type_token[16]; - char width_token[16]; - char height_token[16]; - char maxval_token[16]; - int color_type; - png_uint_32 width, alpha_width; - png_uint_32 height, alpha_height; - png_uint_32 maxval; - int bit_depth = 0; - int channels; - int alpha_depth = 0; - int alpha_present; - int row, col; - BOOL raw, alpha_raw = FALSE; - png_uint_32 tmp16; - int i; - - /* read header of PNM file */ - - get_token(pnm_file, type_token); - if (type_token[0] != 'P') - { - return FALSE; - } - else if ((type_token[1] == '1') || (type_token[1] == '4')) - { - raw = (type_token[1] == '4'); - color_type = PNG_COLOR_TYPE_GRAY; - bit_depth = 1; - } - else if ((type_token[1] == '2') || (type_token[1] == '5')) - { - raw = (type_token[1] == '5'); - color_type = PNG_COLOR_TYPE_GRAY; - get_token(pnm_file, width_token); - sscanf (width_token, "%lu", &width); - get_token(pnm_file, height_token); - sscanf (height_token, "%lu", &height); - get_token(pnm_file, maxval_token); - sscanf (maxval_token, "%lu", &maxval); - if (maxval <= 1) - bit_depth = 1; - else if (maxval <= 3) - bit_depth = 2; - else if (maxval <= 15) - bit_depth = 4; - else if (maxval <= 255) - bit_depth = 8; - else /* if (maxval <= 65535) */ - bit_depth = 16; - } - else if ((type_token[1] == '3') || (type_token[1] == '6')) - { - raw = (type_token[1] == '6'); - color_type = PNG_COLOR_TYPE_RGB; - get_token(pnm_file, width_token); - sscanf (width_token, "%lu", &width); - get_token(pnm_file, height_token); - sscanf (height_token, "%lu", &height); - get_token(pnm_file, maxval_token); - sscanf (maxval_token, "%lu", &maxval); - if (maxval <= 1) - bit_depth = 1; - else if (maxval <= 3) - bit_depth = 2; - else if (maxval <= 15) - bit_depth = 4; - else if (maxval <= 255) - bit_depth = 8; - else /* if (maxval <= 65535) */ - bit_depth = 16; - } - else - { - return FALSE; - } - - /* read header of PGM file with alpha channel */ - - if (alpha) - { - if (color_type == PNG_COLOR_TYPE_GRAY) - color_type = PNG_COLOR_TYPE_GRAY_ALPHA; - if (color_type == PNG_COLOR_TYPE_RGB) - color_type = PNG_COLOR_TYPE_RGB_ALPHA; - - get_token(alpha_file, type_token); - if (type_token[0] != 'P') - { - return FALSE; - } - else if ((type_token[1] == '2') || (type_token[1] == '5')) - { - alpha_raw = (type_token[1] == '5'); - get_token(alpha_file, width_token); - sscanf (width_token, "%lu", &alpha_width); - if (alpha_width != width) - return FALSE; - get_token(alpha_file, height_token); - sscanf (height_token, "%lu", &alpha_height); - if (alpha_height != height) - return FALSE; - get_token(alpha_file, maxval_token); - sscanf (maxval_token, "%lu", &maxval); - if (maxval <= 1) - alpha_depth = 1; - else if (maxval <= 3) - alpha_depth = 2; - else if (maxval <= 15) - alpha_depth = 4; - else if (maxval <= 255) - alpha_depth = 8; - else /* if (maxval <= 65535) */ - alpha_depth = 16; - if (alpha_depth != bit_depth) - return FALSE; - } - else - { - return FALSE; - } - } /* end if alpha */ - - /* calculate the number of channels and store alpha-presence */ - if (color_type == PNG_COLOR_TYPE_GRAY) - channels = 1; - else if (color_type == PNG_COLOR_TYPE_GRAY_ALPHA) - channels = 2; - else if (color_type == PNG_COLOR_TYPE_RGB) - channels = 3; - else if (color_type == PNG_COLOR_TYPE_RGB_ALPHA) - channels = 4; - else - channels = 0; /* should not happen */ - - alpha_present = (channels - 1) % 2; - - /* row_bytes is the width x number of channels x (bit-depth / 8) */ - row_bytes = width * channels * ((bit_depth <= 8) ? 1 : 2); - - if ((png_pixels = (png_byte *) malloc (row_bytes * height * sizeof (png_byte))) == NULL) - return FALSE; - - /* read data from PNM file */ - pix_ptr = png_pixels; - - for (row = 0; row < height; row++) - { - for (col = 0; col < width; col++) - { - for (i = 0; i < (channels - alpha_present); i++) - { - if (raw) - *pix_ptr++ = get_data (pnm_file, bit_depth); - else - if (bit_depth <= 8) - *pix_ptr++ = get_value (pnm_file, bit_depth); - else - { - tmp16 = get_value (pnm_file, bit_depth); - *pix_ptr = (png_byte) ((tmp16 >> 8) & 0xFF); - pix_ptr++; - *pix_ptr = (png_byte) (tmp16 & 0xFF); - pix_ptr++; - } - } - - if (alpha) /* read alpha-channel from pgm file */ - { - if (alpha_raw) - *pix_ptr++ = get_data (alpha_file, alpha_depth); - else - if (alpha_depth <= 8) - *pix_ptr++ = get_value (alpha_file, bit_depth); - else - { - tmp16 = get_value (alpha_file, bit_depth); - *pix_ptr++ = (png_byte) ((tmp16 >> 8) & 0xFF); - *pix_ptr++ = (png_byte) (tmp16 & 0xFF); - } - } /* if alpha */ - - } /* end for col */ - } /* end for row */ - - /* prepare the standard PNG structures */ - png_ptr = png_create_write_struct (PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); - if (!png_ptr) - { - return FALSE; - } - info_ptr = png_create_info_struct (png_ptr); - if (!info_ptr) - { - png_destroy_write_struct (&png_ptr, (png_infopp) NULL); - return FALSE; - } - - /* setjmp() must be called in every function that calls a PNG-reading libpng function */ - if (setjmp (png_jmpbuf(png_ptr))) - { - png_destroy_write_struct (&png_ptr, (png_infopp) NULL); - return FALSE; - } - - /* initialize the png structure */ - png_init_io (png_ptr, png_file); - - /* we're going to write more or less the same PNG as the input file */ - png_set_IHDR (png_ptr, info_ptr, width, height, bit_depth, color_type, - (!interlace) ? PNG_INTERLACE_NONE : PNG_INTERLACE_ADAM7, - PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE); - - /* write the file header information */ - png_write_info (png_ptr, info_ptr); - - /* if needed we will allocate memory for an new array of row-pointers */ - if (row_pointers == (unsigned char**) NULL) - { - if ((row_pointers = (png_byte **) malloc (height * sizeof (png_bytep))) == NULL) - { - png_destroy_write_struct (&png_ptr, (png_infopp) NULL); - return FALSE; - } - } - - /* set the individual row_pointers to point at the correct offsets */ - for (i = 0; i < (height); i++) - row_pointers[i] = png_pixels + i * row_bytes; - - /* write out the entire image data in one call */ - png_write_image (png_ptr, row_pointers); - - /* write the additional chuncks to the PNG file (not really needed) */ - png_write_end (png_ptr, info_ptr); - - /* clean up after the write, and free any memory allocated */ - png_destroy_write_struct (&png_ptr, (png_infopp) NULL); - - if (row_pointers != (unsigned char**) NULL) - free (row_pointers); - if (png_pixels != (unsigned char*) NULL) - free (png_pixels); - - return TRUE; -} /* end of pnm2png */ - -/* - * get_token() - gets the first string after whitespace - */ - -void get_token(FILE *pnm_file, char *token) -{ - int i = 0; - - /* remove white-space */ - do - { - token[i] = (unsigned char) fgetc (pnm_file); - } - while ((token[i] == '\n') || (token[i] == '\r') || (token[i] == ' ')); - - /* read string */ - do - { - i++; - token[i] = (unsigned char) fgetc (pnm_file); - } - while ((token[i] != '\n') && (token[i] != '\r') && (token[i] != ' ')); - - token[i] = '\0'; - - return; -} - -/* - * get_data() - takes first byte and converts into next pixel value, - * taking as much bits as defined by bit-depth and - * using the bit-depth to fill up a byte (0Ah -> AAh) - */ - -png_uint_32 get_data (FILE *pnm_file, int depth) -{ - static int bits_left = 0; - static int old_value = 0; - static int mask = 0; - int i; - png_uint_32 ret_value; - - if (mask == 0) - for (i = 0; i < depth; i++) - mask = (mask >> 1) | 0x80; - - if (bits_left <= 0) - { - old_value = fgetc (pnm_file); - bits_left = 8; - } - - ret_value = old_value & mask; - for (i = 1; i < (8 / depth); i++) - ret_value = ret_value || (ret_value >> depth); - - old_value = (old_value << depth) & 0xFF; - bits_left -= depth; - - return ret_value; -} - -/* - * get_value() - takes first (numeric) string and converts into number, - * using the bit-depth to fill up a byte (0Ah -> AAh) - */ - -png_uint_32 get_value (FILE *pnm_file, int depth) -{ - static png_uint_32 mask = 0; - png_byte token[16]; - png_uint_32 ret_value; - int i = 0; - - if (mask == 0) - for (i = 0; i < depth; i++) - mask = (mask << 1) | 0x01; - - get_token (pnm_file, (char *) token); - sscanf ((const char *) token, "%lu", &ret_value); - - ret_value &= mask; - - if (depth < 8) - for (i = 0; i < (8 / depth); i++) - ret_value = (ret_value << depth) || ret_value; - - return ret_value; -} - -/* end of source */ - diff --git a/extern/libpng/include/libpngpf.3 b/extern/libpng/include/libpngpf.3 deleted file mode 100644 index 8449f173f9..0000000000 --- a/extern/libpng/include/libpngpf.3 +++ /dev/null @@ -1,28 +0,0 @@ -.TH LIBPNGPF 3 "March 29, 2012" -.SH NAME -libpng \- Portable Network Graphics (PNG) Reference Library 1.5.10 -(private functions) -.SH SYNOPSIS -\fB#include \fI"pngpriv.h" - -\fI\fB - -\fBAs of libpng version \fP\fI1.5.1\fP\fB, this section is no longer \fP\fImaintained\fP\fB, now \fIthat - -\fBthe private function prototypes are hidden in pngpriv.h and not \fIaccessible - -\fBto applications. Look in pngpriv.h for the prototypes and a short \fIdescription - -\fBof each \fIfunction. - -\fI\fB - -.SH DESCRIPTION -The functions previously listed here are used privately by libpng -and are not recommended for use by applications. They are -not "exported" to applications using shared libraries. - -.SH SEE ALSO -.BR "png"(5), " libpng"(3), " zlib"(3), " deflate"(5), " " and " zlib"(5) -.SH AUTHOR -Glenn Randers-Pehrson diff --git a/extern/libpng/include/missing b/extern/libpng/include/missing deleted file mode 100755 index 28055d2ae6..0000000000 --- a/extern/libpng/include/missing +++ /dev/null @@ -1,376 +0,0 @@ -#! /bin/sh -# Common stub for a few missing GNU programs while installing. - -scriptversion=2009-04-28.21; # UTC - -# Copyright (C) 1996, 1997, 1999, 2000, 2002, 2003, 2004, 2005, 2006, -# 2008, 2009 Free Software Foundation, Inc. -# Originally by Fran,cois Pinard , 1996. - -# This program is free software; you can redistribute it and/or modify -# it under the terms of the GNU General Public License as published by -# the Free Software Foundation; either version 2, or (at your option) -# any later version. - -# This program is distributed in the hope that it will be useful, -# but WITHOUT ANY WARRANTY; without even the implied warranty of -# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 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Check the \`README' file, - it often tells you about the needed prerequisites for installing - this package. You may also peek at any GNU archive site, in case - some other package would contain this missing \`$1' program." - exit 1 - ;; -esac - -exit 0 - -# Local variables: -# eval: (add-hook 'write-file-hooks 'time-stamp) -# time-stamp-start: "scriptversion=" -# time-stamp-format: "%:y-%02m-%02d.%02H" -# time-stamp-time-zone: "UTC" -# time-stamp-end: "; # UTC" -# End: diff --git a/extern/libpng/include/png.5 b/extern/libpng/include/png.5 deleted file mode 100644 index 34f0e59083..0000000000 --- a/extern/libpng/include/png.5 +++ /dev/null @@ -1,74 +0,0 @@ -.TH PNG 5 "March 29, 2012" -.SH NAME -png \- Portable Network Graphics (PNG) format -.SH DESCRIPTION -PNG (Portable Network Graphics) is an extensible file format for the -lossless, portable, well-compressed storage of raster images. PNG provides -a patent-free replacement for GIF and can also replace many -common uses of TIFF. Indexed-color, grayscale, and truecolor images are -supported, plus an optional alpha channel. Sample depths range from -1 to 16 bits. -.br - -PNG is designed to work well in online viewing applications, such as the -World Wide Web, so it is fully streamable with a progressive display -option. PNG is robust, providing both full file integrity checking and -fast, simple detection of common transmission errors. Also, PNG can store -gamma and chromaticity data for improved color matching on heterogeneous -platforms. - -.SH "SEE ALSO" -.BR "libpng"(3), " libpngpf"(3), " zlib"(3), " deflate"(5), " " and " zlib"(5) -.LP -PNG specification (second edition), November 2003: -.IP -.br - 8) - png_error(png_ptr, "Too many bytes for PNG signature"); - - png_ptr->sig_bytes = (png_byte)(num_bytes < 0 ? 0 : num_bytes); -} - -/* Checks whether the supplied bytes match the PNG signature. We allow - * checking less than the full 8-byte signature so that those apps that - * already read the first few bytes of a file to determine the file type - * can simply check the remaining bytes for extra assurance. Returns - * an integer less than, equal to, or greater than zero if sig is found, - * respectively, to be less than, to match, or be greater than the correct - * PNG signature (this is the same behavior as strcmp, memcmp, etc). - */ -int PNGAPI -png_sig_cmp(png_const_bytep sig, png_size_t start, png_size_t num_to_check) -{ - png_byte png_signature[8] = {137, 80, 78, 71, 13, 10, 26, 10}; - - if (num_to_check > 8) - num_to_check = 8; - - else if (num_to_check < 1) - return (-1); - - if (start > 7) - return (-1); - - if (start + num_to_check > 8) - num_to_check = 8 - start; - - return ((int)(png_memcmp(&sig[start], &png_signature[start], num_to_check))); -} - -#endif /* PNG_READ_SUPPORTED */ - -#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) -/* Function to allocate memory for zlib */ -PNG_FUNCTION(voidpf /* PRIVATE */, -png_zalloc,(voidpf png_ptr, uInt items, uInt size),PNG_ALLOCATED) -{ - png_voidp ptr; - png_structp p=(png_structp)png_ptr; - png_uint_32 save_flags=p->flags; - png_alloc_size_t num_bytes; - - if (png_ptr == NULL) - return (NULL); - - if (items > PNG_UINT_32_MAX/size) - { - png_warning (p, "Potential overflow in png_zalloc()"); - return (NULL); - } - num_bytes = (png_alloc_size_t)items * size; - - p->flags|=PNG_FLAG_MALLOC_NULL_MEM_OK; - ptr = (png_voidp)png_malloc((png_structp)png_ptr, num_bytes); - p->flags=save_flags; - - return ((voidpf)ptr); -} - -/* Function to free memory for zlib */ -void /* PRIVATE */ -png_zfree(voidpf png_ptr, voidpf ptr) -{ - png_free((png_structp)png_ptr, (png_voidp)ptr); -} - -/* Reset the CRC variable to 32 bits of 1's. Care must be taken - * in case CRC is > 32 bits to leave the top bits 0. - */ -void /* PRIVATE */ -png_reset_crc(png_structp png_ptr) -{ - /* The cast is safe because the crc is a 32 bit value. */ - png_ptr->crc = (png_uint_32)crc32(0, Z_NULL, 0); -} - -/* Calculate the CRC over a section of data. We can only pass as - * much data to this routine as the largest single buffer size. We - * also check that this data will actually be used before going to the - * trouble of calculating it. - */ -void /* PRIVATE */ -png_calculate_crc(png_structp png_ptr, png_const_bytep ptr, png_size_t length) -{ - int need_crc = 1; - - if (PNG_CHUNK_ANCILLIARY(png_ptr->chunk_name)) - { - if ((png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_MASK) == - (PNG_FLAG_CRC_ANCILLARY_USE | PNG_FLAG_CRC_ANCILLARY_NOWARN)) - need_crc = 0; - } - - else /* critical */ - { - if (png_ptr->flags & PNG_FLAG_CRC_CRITICAL_IGNORE) - need_crc = 0; - } - - /* 'uLong' is defined as unsigned long, this means that on some systems it is - * a 64 bit value. crc32, however, returns 32 bits so the following cast is - * safe. 'uInt' may be no more than 16 bits, so it is necessary to perform a - * loop here. - */ - if (need_crc && length > 0) - { - uLong crc = png_ptr->crc; /* Should never issue a warning */ - - do - { - uInt safeLength = (uInt)length; - if (safeLength == 0) - safeLength = (uInt)-1; /* evil, but safe */ - - crc = crc32(crc, ptr, safeLength); - - /* The following should never issue compiler warnings, if they do the - * target system has characteristics that will probably violate other - * assumptions within the libpng code. - */ - ptr += safeLength; - length -= safeLength; - } - while (length > 0); - - /* And the following is always safe because the crc is only 32 bits. */ - png_ptr->crc = (png_uint_32)crc; - } -} - -/* Check a user supplied version number, called from both read and write - * functions that create a png_struct - */ -int -png_user_version_check(png_structp png_ptr, png_const_charp user_png_ver) -{ - if (user_png_ver) - { - int i = 0; - - do - { - if (user_png_ver[i] != png_libpng_ver[i]) - png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH; - } while (png_libpng_ver[i++]); - } - - else - png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH; - - if (png_ptr->flags & PNG_FLAG_LIBRARY_MISMATCH) - { - /* Libpng 0.90 and later are binary incompatible with libpng 0.89, so - * we must recompile any applications that use any older library version. - * For versions after libpng 1.0, we will be compatible, so we need - * only check the first digit. - */ - if (user_png_ver == NULL || user_png_ver[0] != png_libpng_ver[0] || - (user_png_ver[0] == '1' && user_png_ver[2] != png_libpng_ver[2]) || - (user_png_ver[0] == '0' && user_png_ver[2] < '9')) - { -#ifdef PNG_WARNINGS_SUPPORTED - size_t pos = 0; - char m[128]; - - pos = png_safecat(m, sizeof m, pos, "Application built with libpng-"); - pos = png_safecat(m, sizeof m, pos, user_png_ver); - pos = png_safecat(m, sizeof m, pos, " but running with "); - pos = png_safecat(m, sizeof m, pos, png_libpng_ver); - - png_warning(png_ptr, m); -#endif - -#ifdef PNG_ERROR_NUMBERS_SUPPORTED - png_ptr->flags = 0; -#endif - - return 0; - } - } - - /* Success return. */ - return 1; -} - -/* Allocate the memory for an info_struct for the application. We don't - * really need the png_ptr, but it could potentially be useful in the - * future. This should be used in favour of malloc(png_sizeof(png_info)) - * and png_info_init() so that applications that want to use a shared - * libpng don't have to be recompiled if png_info changes size. - */ -PNG_FUNCTION(png_infop,PNGAPI -png_create_info_struct,(png_structp png_ptr),PNG_ALLOCATED) -{ - png_infop info_ptr; - - png_debug(1, "in png_create_info_struct"); - - if (png_ptr == NULL) - return (NULL); - -#ifdef PNG_USER_MEM_SUPPORTED - info_ptr = (png_infop)png_create_struct_2(PNG_STRUCT_INFO, - png_ptr->malloc_fn, png_ptr->mem_ptr); -#else - info_ptr = (png_infop)png_create_struct(PNG_STRUCT_INFO); -#endif - if (info_ptr != NULL) - png_info_init_3(&info_ptr, png_sizeof(png_info)); - - return (info_ptr); -} - -/* This function frees the memory associated with a single info struct. - * Normally, one would use either png_destroy_read_struct() or - * png_destroy_write_struct() to free an info struct, but this may be - * useful for some applications. - */ -void PNGAPI -png_destroy_info_struct(png_structp png_ptr, png_infopp info_ptr_ptr) -{ - png_infop info_ptr = NULL; - - png_debug(1, "in png_destroy_info_struct"); - - if (png_ptr == NULL) - return; - - if (info_ptr_ptr != NULL) - info_ptr = *info_ptr_ptr; - - if (info_ptr != NULL) - { - png_info_destroy(png_ptr, info_ptr); - -#ifdef PNG_USER_MEM_SUPPORTED - png_destroy_struct_2((png_voidp)info_ptr, png_ptr->free_fn, - png_ptr->mem_ptr); -#else - png_destroy_struct((png_voidp)info_ptr); -#endif - *info_ptr_ptr = NULL; - } -} - -/* Initialize the info structure. This is now an internal function (0.89) - * and applications using it are urged to use png_create_info_struct() - * instead. - */ - -void PNGAPI -png_info_init_3(png_infopp ptr_ptr, png_size_t png_info_struct_size) -{ - png_infop info_ptr = *ptr_ptr; - - png_debug(1, "in png_info_init_3"); - - if (info_ptr == NULL) - return; - - if (png_sizeof(png_info) > png_info_struct_size) - { - png_destroy_struct(info_ptr); - info_ptr = (png_infop)png_create_struct(PNG_STRUCT_INFO); - *ptr_ptr = info_ptr; - } - - /* Set everything to 0 */ - png_memset(info_ptr, 0, png_sizeof(png_info)); -} - -void PNGAPI -png_data_freer(png_structp png_ptr, png_infop info_ptr, - int freer, png_uint_32 mask) -{ - png_debug(1, "in png_data_freer"); - - if (png_ptr == NULL || info_ptr == NULL) - return; - - if (freer == PNG_DESTROY_WILL_FREE_DATA) - info_ptr->free_me |= mask; - - else if (freer == PNG_USER_WILL_FREE_DATA) - info_ptr->free_me &= ~mask; - - else - png_warning(png_ptr, - "Unknown freer parameter in png_data_freer"); -} - -void PNGAPI -png_free_data(png_structp png_ptr, png_infop info_ptr, png_uint_32 mask, - int num) -{ - png_debug(1, "in png_free_data"); - - if (png_ptr == NULL || info_ptr == NULL) - return; - -#ifdef PNG_TEXT_SUPPORTED - /* Free text item num or (if num == -1) all text items */ - if ((mask & PNG_FREE_TEXT) & info_ptr->free_me) - { - if (num != -1) - { - if (info_ptr->text && info_ptr->text[num].key) - { - png_free(png_ptr, info_ptr->text[num].key); - info_ptr->text[num].key = NULL; - } - } - - else - { - int i; - for (i = 0; i < info_ptr->num_text; i++) - png_free_data(png_ptr, info_ptr, PNG_FREE_TEXT, i); - png_free(png_ptr, info_ptr->text); - info_ptr->text = NULL; - info_ptr->num_text=0; - } - } -#endif - -#ifdef PNG_tRNS_SUPPORTED - /* Free any tRNS entry */ - if ((mask & PNG_FREE_TRNS) & info_ptr->free_me) - { - png_free(png_ptr, info_ptr->trans_alpha); - info_ptr->trans_alpha = NULL; - info_ptr->valid &= ~PNG_INFO_tRNS; - } -#endif - -#ifdef PNG_sCAL_SUPPORTED - /* Free any sCAL entry */ - if ((mask & PNG_FREE_SCAL) & info_ptr->free_me) - { - png_free(png_ptr, info_ptr->scal_s_width); - png_free(png_ptr, info_ptr->scal_s_height); - info_ptr->scal_s_width = NULL; - info_ptr->scal_s_height = NULL; - info_ptr->valid &= ~PNG_INFO_sCAL; - } -#endif - -#ifdef PNG_pCAL_SUPPORTED - /* Free any pCAL entry */ - if ((mask & PNG_FREE_PCAL) & info_ptr->free_me) - { - png_free(png_ptr, info_ptr->pcal_purpose); - png_free(png_ptr, info_ptr->pcal_units); - info_ptr->pcal_purpose = NULL; - info_ptr->pcal_units = NULL; - if (info_ptr->pcal_params != NULL) - { - int i; - for (i = 0; i < (int)info_ptr->pcal_nparams; i++) - { - png_free(png_ptr, info_ptr->pcal_params[i]); - info_ptr->pcal_params[i] = NULL; - } - png_free(png_ptr, info_ptr->pcal_params); - info_ptr->pcal_params = NULL; - } - info_ptr->valid &= ~PNG_INFO_pCAL; - } -#endif - -#ifdef PNG_iCCP_SUPPORTED - /* Free any iCCP entry */ - if ((mask & PNG_FREE_ICCP) & info_ptr->free_me) - { - png_free(png_ptr, info_ptr->iccp_name); - png_free(png_ptr, info_ptr->iccp_profile); - info_ptr->iccp_name = NULL; - info_ptr->iccp_profile = NULL; - info_ptr->valid &= ~PNG_INFO_iCCP; - } -#endif - -#ifdef PNG_sPLT_SUPPORTED - /* Free a given sPLT entry, or (if num == -1) all sPLT entries */ - if ((mask & PNG_FREE_SPLT) & info_ptr->free_me) - { - if (num != -1) - { - if (info_ptr->splt_palettes) - { - png_free(png_ptr, info_ptr->splt_palettes[num].name); - png_free(png_ptr, info_ptr->splt_palettes[num].entries); - info_ptr->splt_palettes[num].name = NULL; - info_ptr->splt_palettes[num].entries = NULL; - } - } - - else - { - if (info_ptr->splt_palettes_num) - { - int i; - for (i = 0; i < (int)info_ptr->splt_palettes_num; i++) - png_free_data(png_ptr, info_ptr, PNG_FREE_SPLT, i); - - png_free(png_ptr, info_ptr->splt_palettes); - info_ptr->splt_palettes = NULL; - info_ptr->splt_palettes_num = 0; - } - info_ptr->valid &= ~PNG_INFO_sPLT; - } - } -#endif - -#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED - if (png_ptr->unknown_chunk.data) - { - png_free(png_ptr, png_ptr->unknown_chunk.data); - png_ptr->unknown_chunk.data = NULL; - } - - if ((mask & PNG_FREE_UNKN) & info_ptr->free_me) - { - if (num != -1) - { - if (info_ptr->unknown_chunks) - { - png_free(png_ptr, info_ptr->unknown_chunks[num].data); - info_ptr->unknown_chunks[num].data = NULL; - } - } - - else - { - int i; - - if (info_ptr->unknown_chunks_num) - { - for (i = 0; i < info_ptr->unknown_chunks_num; i++) - png_free_data(png_ptr, info_ptr, PNG_FREE_UNKN, i); - - png_free(png_ptr, info_ptr->unknown_chunks); - info_ptr->unknown_chunks = NULL; - info_ptr->unknown_chunks_num = 0; - } - } - } -#endif - -#ifdef PNG_hIST_SUPPORTED - /* Free any hIST entry */ - if ((mask & PNG_FREE_HIST) & info_ptr->free_me) - { - png_free(png_ptr, info_ptr->hist); - info_ptr->hist = NULL; - info_ptr->valid &= ~PNG_INFO_hIST; - } -#endif - - /* Free any PLTE entry that was internally allocated */ - if ((mask & PNG_FREE_PLTE) & info_ptr->free_me) - { - png_zfree(png_ptr, info_ptr->palette); - info_ptr->palette = NULL; - info_ptr->valid &= ~PNG_INFO_PLTE; - info_ptr->num_palette = 0; - } - -#ifdef PNG_INFO_IMAGE_SUPPORTED - /* Free any image bits attached to the info structure */ - if ((mask & PNG_FREE_ROWS) & info_ptr->free_me) - { - if (info_ptr->row_pointers) - { - int row; - for (row = 0; row < (int)info_ptr->height; row++) - { - png_free(png_ptr, info_ptr->row_pointers[row]); - info_ptr->row_pointers[row] = NULL; - } - png_free(png_ptr, info_ptr->row_pointers); - info_ptr->row_pointers = NULL; - } - info_ptr->valid &= ~PNG_INFO_IDAT; - } -#endif - - if (num != -1) - mask &= ~PNG_FREE_MUL; - - info_ptr->free_me &= ~mask; -} - -/* This is an internal routine to free any memory that the info struct is - * pointing to before re-using it or freeing the struct itself. Recall - * that png_free() checks for NULL pointers for us. - */ -void /* PRIVATE */ -png_info_destroy(png_structp png_ptr, png_infop info_ptr) -{ - png_debug(1, "in png_info_destroy"); - - png_free_data(png_ptr, info_ptr, PNG_FREE_ALL, -1); - -#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED - if (png_ptr->num_chunk_list) - { - png_free(png_ptr, png_ptr->chunk_list); - png_ptr->chunk_list = NULL; - png_ptr->num_chunk_list = 0; - } -#endif - - png_info_init_3(&info_ptr, png_sizeof(png_info)); -} -#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */ - -/* This function returns a pointer to the io_ptr associated with the user - * functions. The application should free any memory associated with this - * pointer before png_write_destroy() or png_read_destroy() are called. - */ -png_voidp PNGAPI -png_get_io_ptr(png_structp png_ptr) -{ - if (png_ptr == NULL) - return (NULL); - - return (png_ptr->io_ptr); -} - -#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) -# ifdef PNG_STDIO_SUPPORTED -/* Initialize the default input/output functions for the PNG file. If you - * use your own read or write routines, you can call either png_set_read_fn() - * or png_set_write_fn() instead of png_init_io(). If you have defined - * PNG_NO_STDIO or otherwise disabled PNG_STDIO_SUPPORTED, you must use a - * function of your own because "FILE *" isn't necessarily available. - */ -void PNGAPI -png_init_io(png_structp png_ptr, png_FILE_p fp) -{ - png_debug(1, "in png_init_io"); - - if (png_ptr == NULL) - return; - - png_ptr->io_ptr = (png_voidp)fp; -} -# endif - -# ifdef PNG_TIME_RFC1123_SUPPORTED -/* Convert the supplied time into an RFC 1123 string suitable for use in - * a "Creation Time" or other text-based time string. - */ -png_const_charp PNGAPI -png_convert_to_rfc1123(png_structp png_ptr, png_const_timep ptime) -{ - static PNG_CONST char short_months[12][4] = - {"Jan", "Feb", "Mar", "Apr", "May", "Jun", - "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"}; - - if (png_ptr == NULL) - return (NULL); - - if (ptime->year > 9999 /* RFC1123 limitation */ || - ptime->month == 0 || ptime->month > 12 || - ptime->day == 0 || ptime->day > 31 || - ptime->hour > 23 || ptime->minute > 59 || - ptime->second > 60) - { - png_warning(png_ptr, "Ignoring invalid time value"); - return (NULL); - } - - { - size_t pos = 0; - char number_buf[5]; /* enough for a four-digit year */ - -# define APPEND_STRING(string)\ - pos = png_safecat(png_ptr->time_buffer, sizeof png_ptr->time_buffer,\ - pos, (string)) -# define APPEND_NUMBER(format, value)\ - APPEND_STRING(PNG_FORMAT_NUMBER(number_buf, format, (value))) -# define APPEND(ch)\ - if (pos < (sizeof png_ptr->time_buffer)-1)\ - png_ptr->time_buffer[pos++] = (ch) - - APPEND_NUMBER(PNG_NUMBER_FORMAT_u, (unsigned)ptime->day); - APPEND(' '); - APPEND_STRING(short_months[(ptime->month - 1)]); - APPEND(' '); - APPEND_NUMBER(PNG_NUMBER_FORMAT_u, ptime->year); - APPEND(' '); - APPEND_NUMBER(PNG_NUMBER_FORMAT_02u, (unsigned)ptime->hour); - APPEND(':'); - APPEND_NUMBER(PNG_NUMBER_FORMAT_02u, (unsigned)ptime->minute); - APPEND(':'); - APPEND_NUMBER(PNG_NUMBER_FORMAT_02u, (unsigned)ptime->second); - APPEND_STRING(" +0000"); /* This reliably terminates the buffer */ - -# undef APPEND -# undef APPEND_NUMBER -# undef APPEND_STRING - } - - return png_ptr->time_buffer; -} -# endif /* PNG_TIME_RFC1123_SUPPORTED */ - -#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */ - -png_const_charp PNGAPI -png_get_copyright(png_const_structp png_ptr) -{ - PNG_UNUSED(png_ptr) /* Silence compiler warning about unused png_ptr */ -#ifdef PNG_STRING_COPYRIGHT - return PNG_STRING_COPYRIGHT -#else -# ifdef __STDC__ - return PNG_STRING_NEWLINE \ - "libpng version 1.5.10 - March 29, 2012" PNG_STRING_NEWLINE \ - "Copyright (c) 1998-2011 Glenn Randers-Pehrson" PNG_STRING_NEWLINE \ - "Copyright (c) 1996-1997 Andreas Dilger" PNG_STRING_NEWLINE \ - "Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc." \ - PNG_STRING_NEWLINE; -# else - return "libpng version 1.5.10 - March 29, 2012\ - Copyright (c) 1998-2011 Glenn Randers-Pehrson\ - Copyright (c) 1996-1997 Andreas Dilger\ - Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc."; -# endif -#endif -} - -/* The following return the library version as a short string in the - * format 1.0.0 through 99.99.99zz. To get the version of *.h files - * used with your application, print out PNG_LIBPNG_VER_STRING, which - * is defined in png.h. - * Note: now there is no difference between png_get_libpng_ver() and - * png_get_header_ver(). Due to the version_nn_nn_nn typedef guard, - * it is guaranteed that png.c uses the correct version of png.h. - */ -png_const_charp PNGAPI -png_get_libpng_ver(png_const_structp png_ptr) -{ - /* Version of *.c files used when building libpng */ - return png_get_header_ver(png_ptr); -} - -png_const_charp PNGAPI -png_get_header_ver(png_const_structp png_ptr) -{ - /* Version of *.h files used when building libpng */ - PNG_UNUSED(png_ptr) /* Silence compiler warning about unused png_ptr */ - return PNG_LIBPNG_VER_STRING; -} - -png_const_charp PNGAPI -png_get_header_version(png_const_structp png_ptr) -{ - /* Returns longer string containing both version and date */ - PNG_UNUSED(png_ptr) /* Silence compiler warning about unused png_ptr */ -#ifdef __STDC__ - return PNG_HEADER_VERSION_STRING -# ifndef PNG_READ_SUPPORTED - " (NO READ SUPPORT)" -# endif - PNG_STRING_NEWLINE; -#else - return PNG_HEADER_VERSION_STRING; -#endif -} - -#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED -int PNGAPI -png_handle_as_unknown(png_structp png_ptr, png_const_bytep chunk_name) -{ - /* Check chunk_name and return "keep" value if it's on the list, else 0 */ - png_const_bytep p, p_end; - - if (png_ptr == NULL || chunk_name == NULL || png_ptr->num_chunk_list <= 0) - return PNG_HANDLE_CHUNK_AS_DEFAULT; - - p_end = png_ptr->chunk_list; - p = p_end + png_ptr->num_chunk_list*5; /* beyond end */ - - /* The code is the fifth byte after each four byte string. Historically this - * code was always searched from the end of the list, so it should continue - * to do so in case there are duplicated entries. - */ - do /* num_chunk_list > 0, so at least one */ - { - p -= 5; - if (!png_memcmp(chunk_name, p, 4)) - return p[4]; - } - while (p > p_end); - - return PNG_HANDLE_CHUNK_AS_DEFAULT; -} - -int /* PRIVATE */ -png_chunk_unknown_handling(png_structp png_ptr, png_uint_32 chunk_name) -{ - png_byte chunk_string[5]; - - PNG_CSTRING_FROM_CHUNK(chunk_string, chunk_name); - return png_handle_as_unknown(png_ptr, chunk_string); -} -#endif - -#ifdef PNG_READ_SUPPORTED -/* This function, added to libpng-1.0.6g, is untested. */ -int PNGAPI -png_reset_zstream(png_structp png_ptr) -{ - if (png_ptr == NULL) - return Z_STREAM_ERROR; - - return (inflateReset(&png_ptr->zstream)); -} -#endif /* PNG_READ_SUPPORTED */ - -/* This function was added to libpng-1.0.7 */ -png_uint_32 PNGAPI -png_access_version_number(void) -{ - /* Version of *.c files used when building libpng */ - return((png_uint_32)PNG_LIBPNG_VER); -} - - - -#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) -/* png_convert_size: a PNGAPI but no longer in png.h, so deleted - * at libpng 1.5.5! - */ - -/* Added at libpng version 1.2.34 and 1.4.0 (moved from pngset.c) */ -# ifdef PNG_CHECK_cHRM_SUPPORTED - -int /* PRIVATE */ -png_check_cHRM_fixed(png_structp png_ptr, - png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x, - png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y, - png_fixed_point blue_x, png_fixed_point blue_y) -{ - int ret = 1; - unsigned long xy_hi,xy_lo,yx_hi,yx_lo; - - png_debug(1, "in function png_check_cHRM_fixed"); - - if (png_ptr == NULL) - return 0; - - /* (x,y,z) values are first limited to 0..100000 (PNG_FP_1), the white - * y must also be greater than 0. To test for the upper limit calculate - * (PNG_FP_1-y) - x must be <= to this for z to be >= 0 (and the expression - * cannot overflow.) At this point we know x and y are >= 0 and (x+y) is - * <= PNG_FP_1. The previous test on PNG_MAX_UINT_31 is removed because it - * pointless (and it produces compiler warnings!) - */ - if (white_x < 0 || white_y <= 0 || - red_x < 0 || red_y < 0 || - green_x < 0 || green_y < 0 || - blue_x < 0 || blue_y < 0) - { - png_warning(png_ptr, - "Ignoring attempt to set negative chromaticity value"); - ret = 0; - } - /* And (x+y) must be <= PNG_FP_1 (so z is >= 0) */ - if (white_x > PNG_FP_1 - white_y) - { - png_warning(png_ptr, "Invalid cHRM white point"); - ret = 0; - } - - if (red_x > PNG_FP_1 - red_y) - { - png_warning(png_ptr, "Invalid cHRM red point"); - ret = 0; - } - - if (green_x > PNG_FP_1 - green_y) - { - png_warning(png_ptr, "Invalid cHRM green point"); - ret = 0; - } - - if (blue_x > PNG_FP_1 - blue_y) - { - png_warning(png_ptr, "Invalid cHRM blue point"); - ret = 0; - } - - png_64bit_product(green_x - red_x, blue_y - red_y, &xy_hi, &xy_lo); - png_64bit_product(green_y - red_y, blue_x - red_x, &yx_hi, &yx_lo); - - if (xy_hi == yx_hi && xy_lo == yx_lo) - { - png_warning(png_ptr, - "Ignoring attempt to set cHRM RGB triangle with zero area"); - ret = 0; - } - - return ret; -} -# endif /* PNG_CHECK_cHRM_SUPPORTED */ - -#ifdef PNG_cHRM_SUPPORTED -/* Added at libpng-1.5.5 to support read and write of true CIEXYZ values for - * cHRM, as opposed to using chromaticities. These internal APIs return - * non-zero on a parameter error. The X, Y and Z values are required to be - * positive and less than 1.0. - */ -int png_xy_from_XYZ(png_xy *xy, png_XYZ XYZ) -{ - png_int_32 d, dwhite, whiteX, whiteY; - - d = XYZ.redX + XYZ.redY + XYZ.redZ; - if (!png_muldiv(&xy->redx, XYZ.redX, PNG_FP_1, d)) return 1; - if (!png_muldiv(&xy->redy, XYZ.redY, PNG_FP_1, d)) return 1; - dwhite = d; - whiteX = XYZ.redX; - whiteY = XYZ.redY; - - d = XYZ.greenX + XYZ.greenY + XYZ.greenZ; - if (!png_muldiv(&xy->greenx, XYZ.greenX, PNG_FP_1, d)) return 1; - if (!png_muldiv(&xy->greeny, XYZ.greenY, PNG_FP_1, d)) return 1; - dwhite += d; - whiteX += XYZ.greenX; - whiteY += XYZ.greenY; - - d = XYZ.blueX + XYZ.blueY + XYZ.blueZ; - if (!png_muldiv(&xy->bluex, XYZ.blueX, PNG_FP_1, d)) return 1; - if (!png_muldiv(&xy->bluey, XYZ.blueY, PNG_FP_1, d)) return 1; - dwhite += d; - whiteX += XYZ.blueX; - whiteY += XYZ.blueY; - - /* The reference white is simply the same of the end-point (X,Y,Z) vectors, - * thus: - */ - if (!png_muldiv(&xy->whitex, whiteX, PNG_FP_1, dwhite)) return 1; - if (!png_muldiv(&xy->whitey, whiteY, PNG_FP_1, dwhite)) return 1; - - return 0; -} - -int png_XYZ_from_xy(png_XYZ *XYZ, png_xy xy) -{ - png_fixed_point red_inverse, green_inverse, blue_scale; - png_fixed_point left, right, denominator; - - /* Check xy and, implicitly, z. Note that wide gamut color spaces typically - * have end points with 0 tristimulus values (these are impossible end - * points, but they are used to cover the possible colors.) - */ - if (xy.redx < 0 || xy.redx > PNG_FP_1) return 1; - if (xy.redy < 0 || xy.redy > PNG_FP_1-xy.redx) return 1; - if (xy.greenx < 0 || xy.greenx > PNG_FP_1) return 1; - if (xy.greeny < 0 || xy.greeny > PNG_FP_1-xy.greenx) return 1; - if (xy.bluex < 0 || xy.bluex > PNG_FP_1) return 1; - if (xy.bluey < 0 || xy.bluey > PNG_FP_1-xy.bluex) return 1; - if (xy.whitex < 0 || xy.whitex > PNG_FP_1) return 1; - if (xy.whitey < 0 || xy.whitey > PNG_FP_1-xy.whitex) return 1; - - /* The reverse calculation is more difficult because the original tristimulus - * value had 9 independent values (red,green,blue)x(X,Y,Z) however only 8 - * derived values were recorded in the cHRM chunk; - * (red,green,blue,white)x(x,y). This loses one degree of freedom and - * therefore an arbitrary ninth value has to be introduced to undo the - * original transformations. - * - * Think of the original end-points as points in (X,Y,Z) space. The - * chromaticity values (c) have the property: - * - * C - * c = --------- - * X + Y + Z - * - * For each c (x,y,z) from the corresponding original C (X,Y,Z). Thus the - * three chromaticity values (x,y,z) for each end-point obey the - * relationship: - * - * x + y + z = 1 - * - * This describes the plane in (X,Y,Z) space that intersects each axis at the - * value 1.0; call this the chromaticity plane. Thus the chromaticity - * calculation has scaled each end-point so that it is on the x+y+z=1 plane - * and chromaticity is the intersection of the vector from the origin to the - * (X,Y,Z) value with the chromaticity plane. - * - * To fully invert the chromaticity calculation we would need the three - * end-point scale factors, (red-scale, green-scale, blue-scale), but these - * were not recorded. Instead we calculated the reference white (X,Y,Z) and - * recorded the chromaticity of this. The reference white (X,Y,Z) would have - * given all three of the scale factors since: - * - * color-C = color-c * color-scale - * white-C = red-C + green-C + blue-C - * = red-c*red-scale + green-c*green-scale + blue-c*blue-scale - * - * But cHRM records only white-x and white-y, so we have lost the white scale - * factor: - * - * white-C = white-c*white-scale - * - * To handle this the inverse transformation makes an arbitrary assumption - * about white-scale: - * - * Assume: white-Y = 1.0 - * Hence: white-scale = 1/white-y - * Or: red-Y + green-Y + blue-Y = 1.0 - * - * Notice the last statement of the assumption gives an equation in three of - * the nine values we want to calculate. 8 more equations come from the - * above routine as summarised at the top above (the chromaticity - * calculation): - * - * Given: color-x = color-X / (color-X + color-Y + color-Z) - * Hence: (color-x - 1)*color-X + color.x*color-Y + color.x*color-Z = 0 - * - * This is 9 simultaneous equations in the 9 variables "color-C" and can be - * solved by Cramer's rule. Cramer's rule requires calculating 10 9x9 matrix - * determinants, however this is not as bad as it seems because only 28 of - * the total of 90 terms in the various matrices are non-zero. Nevertheless - * Cramer's rule is notoriously numerically unstable because the determinant - * calculation involves the difference of large, but similar, numbers. It is - * difficult to be sure that the calculation is stable for real world values - * and it is certain that it becomes unstable where the end points are close - * together. - * - * So this code uses the perhaps slighly less optimal but more understandable - * and totally obvious approach of calculating color-scale. - * - * This algorithm depends on the precision in white-scale and that is - * (1/white-y), so we can immediately see that as white-y approaches 0 the - * accuracy inherent in the cHRM chunk drops off substantially. - * - * libpng arithmetic: a simple invertion of the above equations - * ------------------------------------------------------------ - * - * white_scale = 1/white-y - * white-X = white-x * white-scale - * white-Y = 1.0 - * white-Z = (1 - white-x - white-y) * white_scale - * - * white-C = red-C + green-C + blue-C - * = red-c*red-scale + green-c*green-scale + blue-c*blue-scale - * - * This gives us three equations in (red-scale,green-scale,blue-scale) where - * all the coefficients are now known: - * - * red-x*red-scale + green-x*green-scale + blue-x*blue-scale - * = white-x/white-y - * red-y*red-scale + green-y*green-scale + blue-y*blue-scale = 1 - * red-z*red-scale + green-z*green-scale + blue-z*blue-scale - * = (1 - white-x - white-y)/white-y - * - * In the last equation color-z is (1 - color-x - color-y) so we can add all - * three equations together to get an alternative third: - * - * red-scale + green-scale + blue-scale = 1/white-y = white-scale - * - * So now we have a Cramer's rule solution where the determinants are just - * 3x3 - far more tractible. Unfortunately 3x3 determinants still involve - * multiplication of three coefficients so we can't guarantee to avoid - * overflow in the libpng fixed point representation. Using Cramer's rule in - * floating point is probably a good choice here, but it's not an option for - * fixed point. Instead proceed to simplify the first two equations by - * eliminating what is likely to be the largest value, blue-scale: - * - * blue-scale = white-scale - red-scale - green-scale - * - * Hence: - * - * (red-x - blue-x)*red-scale + (green-x - blue-x)*green-scale = - * (white-x - blue-x)*white-scale - * - * (red-y - blue-y)*red-scale + (green-y - blue-y)*green-scale = - * 1 - blue-y*white-scale - * - * And now we can trivially solve for (red-scale,green-scale): - * - * green-scale = - * (white-x - blue-x)*white-scale - (red-x - blue-x)*red-scale - * ----------------------------------------------------------- - * green-x - blue-x - * - * red-scale = - * 1 - blue-y*white-scale - (green-y - blue-y) * green-scale - * --------------------------------------------------------- - * red-y - blue-y - * - * Hence: - * - * red-scale = - * ( (green-x - blue-x) * (white-y - blue-y) - - * (green-y - blue-y) * (white-x - blue-x) ) / white-y - * ------------------------------------------------------------------------- - * (green-x - blue-x)*(red-y - blue-y)-(green-y - blue-y)*(red-x - blue-x) - * - * green-scale = - * ( (red-y - blue-y) * (white-x - blue-x) - - * (red-x - blue-x) * (white-y - blue-y) ) / white-y - * ------------------------------------------------------------------------- - * (green-x - blue-x)*(red-y - blue-y)-(green-y - blue-y)*(red-x - blue-x) - * - * Accuracy: - * The input values have 5 decimal digits of accuracy. The values are all in - * the range 0 < value < 1, so simple products are in the same range but may - * need up to 10 decimal digits to preserve the original precision and avoid - * underflow. Because we are using a 32-bit signed representation we cannot - * match this; the best is a little over 9 decimal digits, less than 10. - * - * The approach used here is to preserve the maximum precision within the - * signed representation. Because the red-scale calculation above uses the - * difference between two products of values that must be in the range -1..+1 - * it is sufficient to divide the product by 7; ceil(100,000/32767*2). The - * factor is irrelevant in the calculation because it is applied to both - * numerator and denominator. - * - * Note that the values of the differences of the products of the - * chromaticities in the above equations tend to be small, for example for - * the sRGB chromaticities they are: - * - * red numerator: -0.04751 - * green numerator: -0.08788 - * denominator: -0.2241 (without white-y multiplication) - * - * The resultant Y coefficients from the chromaticities of some widely used - * color space definitions are (to 15 decimal places): - * - * sRGB - * 0.212639005871510 0.715168678767756 0.072192315360734 - * Kodak ProPhoto - * 0.288071128229293 0.711843217810102 0.000085653960605 - * Adobe RGB - * 0.297344975250536 0.627363566255466 0.075291458493998 - * Adobe Wide Gamut RGB - * 0.258728243040113 0.724682314948566 0.016589442011321 - */ - /* By the argument, above overflow should be impossible here. The return - * value of 2 indicates an internal error to the caller. - */ - if (!png_muldiv(&left, xy.greenx-xy.bluex, xy.redy - xy.bluey, 7)) return 2; - if (!png_muldiv(&right, xy.greeny-xy.bluey, xy.redx - xy.bluex, 7)) return 2; - denominator = left - right; - - /* Now find the red numerator. */ - if (!png_muldiv(&left, xy.greenx-xy.bluex, xy.whitey-xy.bluey, 7)) return 2; - if (!png_muldiv(&right, xy.greeny-xy.bluey, xy.whitex-xy.bluex, 7)) return 2; - - /* Overflow is possible here and it indicates an extreme set of PNG cHRM - * chunk values. This calculation actually returns the reciprocal of the - * scale value because this allows us to delay the multiplication of white-y - * into the denominator, which tends to produce a small number. - */ - if (!png_muldiv(&red_inverse, xy.whitey, denominator, left-right) || - red_inverse <= xy.whitey /* r+g+b scales = white scale */) - return 1; - - /* Similarly for green_inverse: */ - if (!png_muldiv(&left, xy.redy-xy.bluey, xy.whitex-xy.bluex, 7)) return 2; - if (!png_muldiv(&right, xy.redx-xy.bluex, xy.whitey-xy.bluey, 7)) return 2; - if (!png_muldiv(&green_inverse, xy.whitey, denominator, left-right) || - green_inverse <= xy.whitey) - return 1; - - /* And the blue scale, the checks above guarantee this can't overflow but it - * can still produce 0 for extreme cHRM values. - */ - blue_scale = png_reciprocal(xy.whitey) - png_reciprocal(red_inverse) - - png_reciprocal(green_inverse); - if (blue_scale <= 0) return 1; - - - /* And fill in the png_XYZ: */ - if (!png_muldiv(&XYZ->redX, xy.redx, PNG_FP_1, red_inverse)) return 1; - if (!png_muldiv(&XYZ->redY, xy.redy, PNG_FP_1, red_inverse)) return 1; - if (!png_muldiv(&XYZ->redZ, PNG_FP_1 - xy.redx - xy.redy, PNG_FP_1, - red_inverse)) - return 1; - - if (!png_muldiv(&XYZ->greenX, xy.greenx, PNG_FP_1, green_inverse)) return 1; - if (!png_muldiv(&XYZ->greenY, xy.greeny, PNG_FP_1, green_inverse)) return 1; - if (!png_muldiv(&XYZ->greenZ, PNG_FP_1 - xy.greenx - xy.greeny, PNG_FP_1, - green_inverse)) - return 1; - - if (!png_muldiv(&XYZ->blueX, xy.bluex, blue_scale, PNG_FP_1)) return 1; - if (!png_muldiv(&XYZ->blueY, xy.bluey, blue_scale, PNG_FP_1)) return 1; - if (!png_muldiv(&XYZ->blueZ, PNG_FP_1 - xy.bluex - xy.bluey, blue_scale, - PNG_FP_1)) - return 1; - - return 0; /*success*/ -} - -int png_XYZ_from_xy_checked(png_structp png_ptr, png_XYZ *XYZ, png_xy xy) -{ - switch (png_XYZ_from_xy(XYZ, xy)) - { - case 0: /* success */ - return 1; - - case 1: - /* The chunk may be technically valid, but we got png_fixed_point - * overflow while trying to get XYZ values out of it. This is - * entirely benign - the cHRM chunk is pretty extreme. - */ - png_warning(png_ptr, - "extreme cHRM chunk cannot be converted to tristimulus values"); - break; - - default: - /* libpng is broken; this should be a warning but if it happens we - * want error reports so for the moment it is an error. - */ - png_error(png_ptr, "internal error in png_XYZ_from_xy"); - break; - } - - /* ERROR RETURN */ - return 0; -} -#endif - -void /* PRIVATE */ -png_check_IHDR(png_structp png_ptr, - png_uint_32 width, png_uint_32 height, int bit_depth, - int color_type, int interlace_type, int compression_type, - int filter_type) -{ - int error = 0; - - /* Check for width and height valid values */ - if (width == 0) - { - png_warning(png_ptr, "Image width is zero in IHDR"); - error = 1; - } - - if (height == 0) - { - png_warning(png_ptr, "Image height is zero in IHDR"); - error = 1; - } - -# ifdef PNG_SET_USER_LIMITS_SUPPORTED - if (width > png_ptr->user_width_max) - -# else - if (width > PNG_USER_WIDTH_MAX) -# endif - { - png_warning(png_ptr, "Image width exceeds user limit in IHDR"); - error = 1; - } - -# ifdef PNG_SET_USER_LIMITS_SUPPORTED - if (height > png_ptr->user_height_max) -# else - if (height > PNG_USER_HEIGHT_MAX) -# endif - { - png_warning(png_ptr, "Image height exceeds user limit in IHDR"); - error = 1; - } - - if (width > PNG_UINT_31_MAX) - { - png_warning(png_ptr, "Invalid image width in IHDR"); - error = 1; - } - - if (height > PNG_UINT_31_MAX) - { - png_warning(png_ptr, "Invalid image height in IHDR"); - error = 1; - } - - if (width > (PNG_UINT_32_MAX - >> 3) /* 8-byte RGBA pixels */ - - 48 /* bigrowbuf hack */ - - 1 /* filter byte */ - - 7*8 /* rounding of width to multiple of 8 pixels */ - - 8) /* extra max_pixel_depth pad */ - png_warning(png_ptr, "Width is too large for libpng to process pixels"); - - /* Check other values */ - if (bit_depth != 1 && bit_depth != 2 && bit_depth != 4 && - bit_depth != 8 && bit_depth != 16) - { - png_warning(png_ptr, "Invalid bit depth in IHDR"); - error = 1; - } - - if (color_type < 0 || color_type == 1 || - color_type == 5 || color_type > 6) - { - png_warning(png_ptr, "Invalid color type in IHDR"); - error = 1; - } - - if (((color_type == PNG_COLOR_TYPE_PALETTE) && bit_depth > 8) || - ((color_type == PNG_COLOR_TYPE_RGB || - color_type == PNG_COLOR_TYPE_GRAY_ALPHA || - color_type == PNG_COLOR_TYPE_RGB_ALPHA) && bit_depth < 8)) - { - png_warning(png_ptr, "Invalid color type/bit depth combination in IHDR"); - error = 1; - } - - if (interlace_type >= PNG_INTERLACE_LAST) - { - png_warning(png_ptr, "Unknown interlace method in IHDR"); - error = 1; - } - - if (compression_type != PNG_COMPRESSION_TYPE_BASE) - { - png_warning(png_ptr, "Unknown compression method in IHDR"); - error = 1; - } - -# ifdef PNG_MNG_FEATURES_SUPPORTED - /* Accept filter_method 64 (intrapixel differencing) only if - * 1. Libpng was compiled with PNG_MNG_FEATURES_SUPPORTED and - * 2. Libpng did not read a PNG signature (this filter_method is only - * used in PNG datastreams that are embedded in MNG datastreams) and - * 3. The application called png_permit_mng_features with a mask that - * included PNG_FLAG_MNG_FILTER_64 and - * 4. The filter_method is 64 and - * 5. The color_type is RGB or RGBA - */ - if ((png_ptr->mode & PNG_HAVE_PNG_SIGNATURE) && - png_ptr->mng_features_permitted) - png_warning(png_ptr, "MNG features are not allowed in a PNG datastream"); - - if (filter_type != PNG_FILTER_TYPE_BASE) - { - if (!((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) && - (filter_type == PNG_INTRAPIXEL_DIFFERENCING) && - ((png_ptr->mode & PNG_HAVE_PNG_SIGNATURE) == 0) && - (color_type == PNG_COLOR_TYPE_RGB || - color_type == PNG_COLOR_TYPE_RGB_ALPHA))) - { - png_warning(png_ptr, "Unknown filter method in IHDR"); - error = 1; - } - - if (png_ptr->mode & PNG_HAVE_PNG_SIGNATURE) - { - png_warning(png_ptr, "Invalid filter method in IHDR"); - error = 1; - } - } - -# else - if (filter_type != PNG_FILTER_TYPE_BASE) - { - png_warning(png_ptr, "Unknown filter method in IHDR"); - error = 1; - } -# endif - - if (error == 1) - png_error(png_ptr, "Invalid IHDR data"); -} - -#if defined(PNG_sCAL_SUPPORTED) || defined(PNG_pCAL_SUPPORTED) -/* ASCII to fp functions */ -/* Check an ASCII formated floating point value, see the more detailed - * comments in pngpriv.h - */ -/* The following is used internally to preserve the sticky flags */ -#define png_fp_add(state, flags) ((state) |= (flags)) -#define png_fp_set(state, value) ((state) = (value) | ((state) & PNG_FP_STICKY)) - -int /* PRIVATE */ -png_check_fp_number(png_const_charp string, png_size_t size, int *statep, - png_size_tp whereami) -{ - int state = *statep; - png_size_t i = *whereami; - - while (i < size) - { - int type; - /* First find the type of the next character */ - switch (string[i]) - { - case 43: type = PNG_FP_SAW_SIGN; break; - case 45: type = PNG_FP_SAW_SIGN + PNG_FP_NEGATIVE; break; - case 46: type = PNG_FP_SAW_DOT; break; - case 48: type = PNG_FP_SAW_DIGIT; break; - case 49: case 50: case 51: case 52: - case 53: case 54: case 55: case 56: - case 57: type = PNG_FP_SAW_DIGIT + PNG_FP_NONZERO; break; - case 69: - case 101: type = PNG_FP_SAW_E; break; - default: goto PNG_FP_End; - } - - /* Now deal with this type according to the current - * state, the type is arranged to not overlap the - * bits of the PNG_FP_STATE. - */ - switch ((state & PNG_FP_STATE) + (type & PNG_FP_SAW_ANY)) - { - case PNG_FP_INTEGER + PNG_FP_SAW_SIGN: - if (state & PNG_FP_SAW_ANY) - goto PNG_FP_End; /* not a part of the number */ - - png_fp_add(state, type); - break; - - case PNG_FP_INTEGER + PNG_FP_SAW_DOT: - /* Ok as trailer, ok as lead of fraction. */ - if (state & PNG_FP_SAW_DOT) /* two dots */ - goto PNG_FP_End; - - else if (state & PNG_FP_SAW_DIGIT) /* trailing dot? */ - png_fp_add(state, type); - - else - png_fp_set(state, PNG_FP_FRACTION | type); - - break; - - case PNG_FP_INTEGER + PNG_FP_SAW_DIGIT: - if (state & PNG_FP_SAW_DOT) /* delayed fraction */ - png_fp_set(state, PNG_FP_FRACTION | PNG_FP_SAW_DOT); - - png_fp_add(state, type | PNG_FP_WAS_VALID); - - break; - - case PNG_FP_INTEGER + PNG_FP_SAW_E: - if ((state & PNG_FP_SAW_DIGIT) == 0) - goto PNG_FP_End; - - png_fp_set(state, PNG_FP_EXPONENT); - - break; - - /* case PNG_FP_FRACTION + PNG_FP_SAW_SIGN: - goto PNG_FP_End; ** no sign in fraction */ - - /* case PNG_FP_FRACTION + PNG_FP_SAW_DOT: - goto PNG_FP_End; ** Because SAW_DOT is always set */ - - case PNG_FP_FRACTION + PNG_FP_SAW_DIGIT: - png_fp_add(state, type | PNG_FP_WAS_VALID); - break; - - case PNG_FP_FRACTION + PNG_FP_SAW_E: - /* This is correct because the trailing '.' on an - * integer is handled above - so we can only get here - * with the sequence ".E" (with no preceding digits). - */ - if ((state & PNG_FP_SAW_DIGIT) == 0) - goto PNG_FP_End; - - png_fp_set(state, PNG_FP_EXPONENT); - - break; - - case PNG_FP_EXPONENT + PNG_FP_SAW_SIGN: - if (state & PNG_FP_SAW_ANY) - goto PNG_FP_End; /* not a part of the number */ - - png_fp_add(state, PNG_FP_SAW_SIGN); - - break; - - /* case PNG_FP_EXPONENT + PNG_FP_SAW_DOT: - goto PNG_FP_End; */ - - case PNG_FP_EXPONENT + PNG_FP_SAW_DIGIT: - png_fp_add(state, PNG_FP_SAW_DIGIT | PNG_FP_WAS_VALID); - - break; - - /* case PNG_FP_EXPONEXT + PNG_FP_SAW_E: - goto PNG_FP_End; */ - - default: goto PNG_FP_End; /* I.e. break 2 */ - } - - /* The character seems ok, continue. */ - ++i; - } - -PNG_FP_End: - /* Here at the end, update the state and return the correct - * return code. - */ - *statep = state; - *whereami = i; - - return (state & PNG_FP_SAW_DIGIT) != 0; -} - - -/* The same but for a complete string. */ -int -png_check_fp_string(png_const_charp string, png_size_t size) -{ - int state=0; - png_size_t char_index=0; - - if (png_check_fp_number(string, size, &state, &char_index) && - (char_index == size || string[char_index] == 0)) - return state /* must be non-zero - see above */; - - return 0; /* i.e. fail */ -} -#endif /* pCAL or sCAL */ - -#ifdef PNG_READ_sCAL_SUPPORTED -# ifdef PNG_FLOATING_POINT_SUPPORTED -/* Utility used below - a simple accurate power of ten from an integral - * exponent. - */ -static double -png_pow10(int power) -{ - int recip = 0; - double d = 1.0; - - /* Handle negative exponent with a reciprocal at the end because - * 10 is exact whereas .1 is inexact in base 2 - */ - if (power < 0) - { - if (power < DBL_MIN_10_EXP) return 0; - recip = 1, power = -power; - } - - if (power > 0) - { - /* Decompose power bitwise. */ - double mult = 10.0; - do - { - if (power & 1) d *= mult; - mult *= mult; - power >>= 1; - } - while (power > 0); - - if (recip) d = 1/d; - } - /* else power is 0 and d is 1 */ - - return d; -} - -/* Function to format a floating point value in ASCII with a given - * precision. - */ -void /* PRIVATE */ -png_ascii_from_fp(png_structp png_ptr, png_charp ascii, png_size_t size, - double fp, unsigned int precision) -{ - /* We use standard functions from math.h, but not printf because - * that would require stdio. The caller must supply a buffer of - * sufficient size or we will png_error. The tests on size and - * the space in ascii[] consumed are indicated below. - */ - if (precision < 1) - precision = DBL_DIG; - - /* Enforce the limit of the implementation precision too. */ - if (precision > DBL_DIG+1) - precision = DBL_DIG+1; - - /* Basic sanity checks */ - if (size >= precision+5) /* See the requirements below. */ - { - if (fp < 0) - { - fp = -fp; - *ascii++ = 45; /* '-' PLUS 1 TOTAL 1 */ - --size; - } - - if (fp >= DBL_MIN && fp <= DBL_MAX) - { - int exp_b10; /* A base 10 exponent */ - double base; /* 10^exp_b10 */ - - /* First extract a base 10 exponent of the number, - * the calculation below rounds down when converting - * from base 2 to base 10 (multiply by log10(2) - - * 0.3010, but 77/256 is 0.3008, so exp_b10 needs to - * be increased. Note that the arithmetic shift - * performs a floor() unlike C arithmetic - using a - * C multiply would break the following for negative - * exponents. - */ - (void)frexp(fp, &exp_b10); /* exponent to base 2 */ - - exp_b10 = (exp_b10 * 77) >> 8; /* <= exponent to base 10 */ - - /* Avoid underflow here. */ - base = png_pow10(exp_b10); /* May underflow */ - - while (base < DBL_MIN || base < fp) - { - /* And this may overflow. */ - double test = png_pow10(exp_b10+1); - - if (test <= DBL_MAX) - ++exp_b10, base = test; - - else - break; - } - - /* Normalize fp and correct exp_b10, after this fp is in the - * range [.1,1) and exp_b10 is both the exponent and the digit - * *before* which the decimal point should be inserted - * (starting with 0 for the first digit). Note that this - * works even if 10^exp_b10 is out of range because of the - * test on DBL_MAX above. - */ - fp /= base; - while (fp >= 1) fp /= 10, ++exp_b10; - - /* Because of the code above fp may, at this point, be - * less than .1, this is ok because the code below can - * handle the leading zeros this generates, so no attempt - * is made to correct that here. - */ - - { - int czero, clead, cdigits; - char exponent[10]; - - /* Allow up to two leading zeros - this will not lengthen - * the number compared to using E-n. - */ - if (exp_b10 < 0 && exp_b10 > -3) /* PLUS 3 TOTAL 4 */ - { - czero = -exp_b10; /* PLUS 2 digits: TOTAL 3 */ - exp_b10 = 0; /* Dot added below before first output. */ - } - else - czero = 0; /* No zeros to add */ - - /* Generate the digit list, stripping trailing zeros and - * inserting a '.' before a digit if the exponent is 0. - */ - clead = czero; /* Count of leading zeros */ - cdigits = 0; /* Count of digits in list. */ - - do - { - double d; - - fp *= 10.0; - - /* Use modf here, not floor and subtract, so that - * the separation is done in one step. At the end - * of the loop don't break the number into parts so - * that the final digit is rounded. - */ - if (cdigits+czero-clead+1 < (int)precision) - fp = modf(fp, &d); - - else - { - d = floor(fp + .5); - - if (d > 9.0) - { - /* Rounding up to 10, handle that here. */ - if (czero > 0) - { - --czero, d = 1; - if (cdigits == 0) --clead; - } - - else - { - while (cdigits > 0 && d > 9.0) - { - int ch = *--ascii; - - if (exp_b10 != (-1)) - ++exp_b10; - - else if (ch == 46) - { - ch = *--ascii, ++size; - /* Advance exp_b10 to '1', so that the - * decimal point happens after the - * previous digit. - */ - exp_b10 = 1; - } - - --cdigits; - d = ch - 47; /* I.e. 1+(ch-48) */ - } - - /* Did we reach the beginning? If so adjust the - * exponent but take into account the leading - * decimal point. - */ - if (d > 9.0) /* cdigits == 0 */ - { - if (exp_b10 == (-1)) - { - /* Leading decimal point (plus zeros?), if - * we lose the decimal point here it must - * be reentered below. - */ - int ch = *--ascii; - - if (ch == 46) - ++size, exp_b10 = 1; - - /* Else lost a leading zero, so 'exp_b10' is - * still ok at (-1) - */ - } - else - ++exp_b10; - - /* In all cases we output a '1' */ - d = 1.0; - } - } - } - fp = 0; /* Guarantees termination below. */ - } - - if (d == 0.0) - { - ++czero; - if (cdigits == 0) ++clead; - } - - else - { - /* Included embedded zeros in the digit count. */ - cdigits += czero - clead; - clead = 0; - - while (czero > 0) - { - /* exp_b10 == (-1) means we just output the decimal - * place - after the DP don't adjust 'exp_b10' any - * more! - */ - if (exp_b10 != (-1)) - { - if (exp_b10 == 0) *ascii++ = 46, --size; - /* PLUS 1: TOTAL 4 */ - --exp_b10; - } - *ascii++ = 48, --czero; - } - - if (exp_b10 != (-1)) - { - if (exp_b10 == 0) *ascii++ = 46, --size; /* counted - above */ - --exp_b10; - } - - *ascii++ = (char)(48 + (int)d), ++cdigits; - } - } - while (cdigits+czero-clead < (int)precision && fp > DBL_MIN); - - /* The total output count (max) is now 4+precision */ - - /* Check for an exponent, if we don't need one we are - * done and just need to terminate the string. At - * this point exp_b10==(-1) is effectively if flag - it got - * to '-1' because of the decrement after outputing - * the decimal point above (the exponent required is - * *not* -1!) - */ - if (exp_b10 >= (-1) && exp_b10 <= 2) - { - /* The following only happens if we didn't output the - * leading zeros above for negative exponent, so this - * doest add to the digit requirement. Note that the - * two zeros here can only be output if the two leading - * zeros were *not* output, so this doesn't increase - * the output count. - */ - while (--exp_b10 >= 0) *ascii++ = 48; - - *ascii = 0; - - /* Total buffer requirement (including the '\0') is - * 5+precision - see check at the start. - */ - return; - } - - /* Here if an exponent is required, adjust size for - * the digits we output but did not count. The total - * digit output here so far is at most 1+precision - no - * decimal point and no leading or trailing zeros have - * been output. - */ - size -= cdigits; - - *ascii++ = 69, --size; /* 'E': PLUS 1 TOTAL 2+precision */ - - /* The following use of an unsigned temporary avoids ambiguities in - * the signed arithmetic on exp_b10 and permits GCC at least to do - * better optimization. - */ - { - unsigned int uexp_b10; - - if (exp_b10 < 0) - { - *ascii++ = 45, --size; /* '-': PLUS 1 TOTAL 3+precision */ - uexp_b10 = -exp_b10; - } - - else - uexp_b10 = exp_b10; - - cdigits = 0; - - while (uexp_b10 > 0) - { - exponent[cdigits++] = (char)(48 + uexp_b10 % 10); - uexp_b10 /= 10; - } - } - - /* Need another size check here for the exponent digits, so - * this need not be considered above. - */ - if ((int)size > cdigits) - { - while (cdigits > 0) *ascii++ = exponent[--cdigits]; - - *ascii = 0; - - return; - } - } - } - else if (!(fp >= DBL_MIN)) - { - *ascii++ = 48; /* '0' */ - *ascii = 0; - return; - } - else - { - *ascii++ = 105; /* 'i' */ - *ascii++ = 110; /* 'n' */ - *ascii++ = 102; /* 'f' */ - *ascii = 0; - return; - } - } - - /* Here on buffer too small. */ - png_error(png_ptr, "ASCII conversion buffer too small"); -} - -# endif /* FLOATING_POINT */ - -# ifdef PNG_FIXED_POINT_SUPPORTED -/* Function to format a fixed point value in ASCII. - */ -void /* PRIVATE */ -png_ascii_from_fixed(png_structp png_ptr, png_charp ascii, png_size_t size, - png_fixed_point fp) -{ - /* Require space for 10 decimal digits, a decimal point, a minus sign and a - * trailing \0, 13 characters: - */ - if (size > 12) - { - png_uint_32 num; - - /* Avoid overflow here on the minimum integer. */ - if (fp < 0) - *ascii++ = 45, --size, num = -fp; - else - num = fp; - - if (num <= 0x80000000) /* else overflowed */ - { - unsigned int ndigits = 0, first = 16 /* flag value */; - char digits[10]; - - while (num) - { - /* Split the low digit off num: */ - unsigned int tmp = num/10; - num -= tmp*10; - digits[ndigits++] = (char)(48 + num); - /* Record the first non-zero digit, note that this is a number - * starting at 1, it's not actually the array index. - */ - if (first == 16 && num > 0) - first = ndigits; - num = tmp; - } - - if (ndigits > 0) - { - while (ndigits > 5) *ascii++ = digits[--ndigits]; - /* The remaining digits are fractional digits, ndigits is '5' or - * smaller at this point. It is certainly not zero. Check for a - * non-zero fractional digit: - */ - if (first <= 5) - { - unsigned int i; - *ascii++ = 46; /* decimal point */ - /* ndigits may be <5 for small numbers, output leading zeros - * then ndigits digits to first: - */ - i = 5; - while (ndigits < i) *ascii++ = 48, --i; - while (ndigits >= first) *ascii++ = digits[--ndigits]; - /* Don't output the trailing zeros! */ - } - } - else - *ascii++ = 48; - - /* And null terminate the string: */ - *ascii = 0; - return; - } - } - - /* Here on buffer too small. */ - png_error(png_ptr, "ASCII conversion buffer too small"); -} -# endif /* FIXED_POINT */ -#endif /* READ_SCAL */ - -#if defined(PNG_FLOATING_POINT_SUPPORTED) && \ - !defined(PNG_FIXED_POINT_MACRO_SUPPORTED) -png_fixed_point -png_fixed(png_structp png_ptr, double fp, png_const_charp text) -{ - double r = floor(100000 * fp + .5); - - if (r > 2147483647. || r < -2147483648.) - png_fixed_error(png_ptr, text); - - return (png_fixed_point)r; -} -#endif - -#if defined(PNG_READ_GAMMA_SUPPORTED) || \ - defined(PNG_INCH_CONVERSIONS_SUPPORTED) || defined(PNG__READ_pHYs_SUPPORTED) -/* muldiv functions */ -/* This API takes signed arguments and rounds the result to the nearest - * integer (or, for a fixed point number - the standard argument - to - * the nearest .00001). Overflow and divide by zero are signalled in - * the result, a boolean - true on success, false on overflow. - */ -int -png_muldiv(png_fixed_point_p res, png_fixed_point a, png_int_32 times, - png_int_32 divisor) -{ - /* Return a * times / divisor, rounded. */ - if (divisor != 0) - { - if (a == 0 || times == 0) - { - *res = 0; - return 1; - } - else - { -#ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED - double r = a; - r *= times; - r /= divisor; - r = floor(r+.5); - - /* A png_fixed_point is a 32-bit integer. */ - if (r <= 2147483647. && r >= -2147483648.) - { - *res = (png_fixed_point)r; - return 1; - } -#else - int negative = 0; - png_uint_32 A, T, D; - png_uint_32 s16, s32, s00; - - if (a < 0) - negative = 1, A = -a; - else - A = a; - - if (times < 0) - negative = !negative, T = -times; - else - T = times; - - if (divisor < 0) - negative = !negative, D = -divisor; - else - D = divisor; - - /* Following can't overflow because the arguments only - * have 31 bits each, however the result may be 32 bits. - */ - s16 = (A >> 16) * (T & 0xffff) + - (A & 0xffff) * (T >> 16); - /* Can't overflow because the a*times bit is only 30 - * bits at most. - */ - s32 = (A >> 16) * (T >> 16) + (s16 >> 16); - s00 = (A & 0xffff) * (T & 0xffff); - - s16 = (s16 & 0xffff) << 16; - s00 += s16; - - if (s00 < s16) - ++s32; /* carry */ - - if (s32 < D) /* else overflow */ - { - /* s32.s00 is now the 64-bit product, do a standard - * division, we know that s32 < D, so the maximum - * required shift is 31. - */ - int bitshift = 32; - png_fixed_point result = 0; /* NOTE: signed */ - - while (--bitshift >= 0) - { - png_uint_32 d32, d00; - - if (bitshift > 0) - d32 = D >> (32-bitshift), d00 = D << bitshift; - - else - d32 = 0, d00 = D; - - if (s32 > d32) - { - if (s00 < d00) --s32; /* carry */ - s32 -= d32, s00 -= d00, result += 1<= d00) - s32 = 0, s00 -= d00, result += 1<= (D >> 1)) - ++result; - - if (negative) - result = -result; - - /* Check for overflow. */ - if ((negative && result <= 0) || (!negative && result >= 0)) - { - *res = result; - return 1; - } - } -#endif - } - } - - return 0; -} -#endif /* READ_GAMMA || INCH_CONVERSIONS */ - -#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_INCH_CONVERSIONS_SUPPORTED) -/* The following is for when the caller doesn't much care about the - * result. - */ -png_fixed_point -png_muldiv_warn(png_structp png_ptr, png_fixed_point a, png_int_32 times, - png_int_32 divisor) -{ - png_fixed_point result; - - if (png_muldiv(&result, a, times, divisor)) - return result; - - png_warning(png_ptr, "fixed point overflow ignored"); - return 0; -} -#endif - -#ifdef PNG_READ_GAMMA_SUPPORTED /* more fixed point functions for gammma */ -/* Calculate a reciprocal, return 0 on div-by-zero or overflow. */ -png_fixed_point -png_reciprocal(png_fixed_point a) -{ -#ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED - double r = floor(1E10/a+.5); - - if (r <= 2147483647. && r >= -2147483648.) - return (png_fixed_point)r; -#else - png_fixed_point res; - - if (png_muldiv(&res, 100000, 100000, a)) - return res; -#endif - - return 0; /* error/overflow */ -} - -/* A local convenience routine. */ -static png_fixed_point -png_product2(png_fixed_point a, png_fixed_point b) -{ - /* The required result is 1/a * 1/b; the following preserves accuracy. */ -#ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED - double r = a * 1E-5; - r *= b; - r = floor(r+.5); - - if (r <= 2147483647. && r >= -2147483648.) - return (png_fixed_point)r; -#else - png_fixed_point res; - - if (png_muldiv(&res, a, b, 100000)) - return res; -#endif - - return 0; /* overflow */ -} - -/* The inverse of the above. */ -png_fixed_point -png_reciprocal2(png_fixed_point a, png_fixed_point b) -{ - /* The required result is 1/a * 1/b; the following preserves accuracy. */ -#ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED - double r = 1E15/a; - r /= b; - r = floor(r+.5); - - if (r <= 2147483647. && r >= -2147483648.) - return (png_fixed_point)r; -#else - /* This may overflow because the range of png_fixed_point isn't symmetric, - * but this API is only used for the product of file and screen gamma so it - * doesn't matter that the smallest number it can produce is 1/21474, not - * 1/100000 - */ - png_fixed_point res = png_product2(a, b); - - if (res != 0) - return png_reciprocal(res); -#endif - - return 0; /* overflow */ -} -#endif /* READ_GAMMA */ - -#ifdef PNG_CHECK_cHRM_SUPPORTED -/* Added at libpng version 1.2.34 (Dec 8, 2008) and 1.4.0 (Jan 2, - * 2010: moved from pngset.c) */ -/* - * Multiply two 32-bit numbers, V1 and V2, using 32-bit - * arithmetic, to produce a 64-bit result in the HI/LO words. - * - * A B - * x C D - * ------ - * AD || BD - * AC || CB || 0 - * - * where A and B are the high and low 16-bit words of V1, - * C and D are the 16-bit words of V2, AD is the product of - * A and D, and X || Y is (X << 16) + Y. -*/ - -void /* PRIVATE */ -png_64bit_product (long v1, long v2, unsigned long *hi_product, - unsigned long *lo_product) -{ - int a, b, c, d; - long lo, hi, x, y; - - a = (v1 >> 16) & 0xffff; - b = v1 & 0xffff; - c = (v2 >> 16) & 0xffff; - d = v2 & 0xffff; - - lo = b * d; /* BD */ - x = a * d + c * b; /* AD + CB */ - y = ((lo >> 16) & 0xffff) + x; - - lo = (lo & 0xffff) | ((y & 0xffff) << 16); - hi = (y >> 16) & 0xffff; - - hi += a * c; /* AC */ - - *hi_product = (unsigned long)hi; - *lo_product = (unsigned long)lo; -} -#endif /* CHECK_cHRM */ - -#ifdef PNG_READ_GAMMA_SUPPORTED /* gamma table code */ -#ifndef PNG_FLOATING_ARITHMETIC_SUPPORTED -/* Fixed point gamma. - * - * To calculate gamma this code implements fast log() and exp() calls using only - * fixed point arithmetic. This code has sufficient precision for either 8-bit - * or 16-bit sample values. - * - * The tables used here were calculated using simple 'bc' programs, but C double - * precision floating point arithmetic would work fine. The programs are given - * at the head of each table. - * - * 8-bit log table - * This is a table of -log(value/255)/log(2) for 'value' in the range 128 to - * 255, so it's the base 2 logarithm of a normalized 8-bit floating point - * mantissa. The numbers are 32-bit fractions. - */ -static png_uint_32 -png_8bit_l2[128] = -{ -# ifdef PNG_DO_BC - for (i=128;i<256;++i) { .5 - l(i/255)/l(2)*65536*65536; } -# else - 4270715492U, 4222494797U, 4174646467U, 4127164793U, 4080044201U, 4033279239U, - 3986864580U, 3940795015U, 3895065449U, 3849670902U, 3804606499U, 3759867474U, - 3715449162U, 3671346997U, 3627556511U, 3584073329U, 3540893168U, 3498011834U, - 3455425220U, 3413129301U, 3371120137U, 3329393864U, 3287946700U, 3246774933U, - 3205874930U, 3165243125U, 3124876025U, 3084770202U, 3044922296U, 3005329011U, - 2965987113U, 2926893432U, 2888044853U, 2849438323U, 2811070844U, 2772939474U, - 2735041326U, 2697373562U, 2659933400U, 2622718104U, 2585724991U, 2548951424U, - 2512394810U, 2476052606U, 2439922311U, 2404001468U, 2368287663U, 2332778523U, - 2297471715U, 2262364947U, 2227455964U, 2192742551U, 2158222529U, 2123893754U, - 2089754119U, 2055801552U, 2022034013U, 1988449497U, 1955046031U, 1921821672U, - 1888774511U, 1855902668U, 1823204291U, 1790677560U, 1758320682U, 1726131893U, - 1694109454U, 1662251657U, 1630556815U, 1599023271U, 1567649391U, 1536433567U, - 1505374214U, 1474469770U, 1443718700U, 1413119487U, 1382670639U, 1352370686U, - 1322218179U, 1292211689U, 1262349810U, 1232631153U, 1203054352U, 1173618059U, - 1144320946U, 1115161701U, 1086139034U, 1057251672U, 1028498358U, 999877854U, - 971388940U, 943030410U, 914801076U, 886699767U, 858725327U, 830876614U, - 803152505U, 775551890U, 748073672U, 720716771U, 693480120U, 666362667U, - 639363374U, 612481215U, 585715177U, 559064263U, 532527486U, 506103872U, - 479792461U, 453592303U, 427502463U, 401522014U, 375650043U, 349885648U, - 324227938U, 298676034U, 273229066U, 247886176U, 222646516U, 197509248U, - 172473545U, 147538590U, 122703574U, 97967701U, 73330182U, 48790236U, - 24347096U, 0U -# endif - -#if 0 - /* The following are the values for 16-bit tables - these work fine for the - * 8-bit conversions but produce very slightly larger errors in the 16-bit - * log (about 1.2 as opposed to 0.7 absolute error in the final value). To - * use these all the shifts below must be adjusted appropriately. - */ - 65166, 64430, 63700, 62976, 62257, 61543, 60835, 60132, 59434, 58741, 58054, - 57371, 56693, 56020, 55352, 54689, 54030, 53375, 52726, 52080, 51439, 50803, - 50170, 49542, 48918, 48298, 47682, 47070, 46462, 45858, 45257, 44661, 44068, - 43479, 42894, 42312, 41733, 41159, 40587, 40020, 39455, 38894, 38336, 37782, - 37230, 36682, 36137, 35595, 35057, 34521, 33988, 33459, 32932, 32408, 31887, - 31369, 30854, 30341, 29832, 29325, 28820, 28319, 27820, 27324, 26830, 26339, - 25850, 25364, 24880, 24399, 23920, 23444, 22970, 22499, 22029, 21562, 21098, - 20636, 20175, 19718, 19262, 18808, 18357, 17908, 17461, 17016, 16573, 16132, - 15694, 15257, 14822, 14390, 13959, 13530, 13103, 12678, 12255, 11834, 11415, - 10997, 10582, 10168, 9756, 9346, 8937, 8531, 8126, 7723, 7321, 6921, 6523, - 6127, 5732, 5339, 4947, 4557, 4169, 3782, 3397, 3014, 2632, 2251, 1872, 1495, - 1119, 744, 372 -#endif -}; - -PNG_STATIC png_int_32 -png_log8bit(unsigned int x) -{ - unsigned int lg2 = 0; - /* Each time 'x' is multiplied by 2, 1 must be subtracted off the final log, - * because the log is actually negate that means adding 1. The final - * returned value thus has the range 0 (for 255 input) to 7.994 (for 1 - * input), return 7.99998 for the overflow (log 0) case - so the result is - * always at most 19 bits. - */ - if ((x &= 0xff) == 0) - return 0xffffffff; - - if ((x & 0xf0) == 0) - lg2 = 4, x <<= 4; - - if ((x & 0xc0) == 0) - lg2 += 2, x <<= 2; - - if ((x & 0x80) == 0) - lg2 += 1, x <<= 1; - - /* result is at most 19 bits, so this cast is safe: */ - return (png_int_32)((lg2 << 16) + ((png_8bit_l2[x-128]+32768)>>16)); -} - -/* The above gives exact (to 16 binary places) log2 values for 8-bit images, - * for 16-bit images we use the most significant 8 bits of the 16-bit value to - * get an approximation then multiply the approximation by a correction factor - * determined by the remaining up to 8 bits. This requires an additional step - * in the 16-bit case. - * - * We want log2(value/65535), we have log2(v'/255), where: - * - * value = v' * 256 + v'' - * = v' * f - * - * So f is value/v', which is equal to (256+v''/v') since v' is in the range 128 - * to 255 and v'' is in the range 0 to 255 f will be in the range 256 to less - * than 258. The final factor also needs to correct for the fact that our 8-bit - * value is scaled by 255, whereas the 16-bit values must be scaled by 65535. - * - * This gives a final formula using a calculated value 'x' which is value/v' and - * scaling by 65536 to match the above table: - * - * log2(x/257) * 65536 - * - * Since these numbers are so close to '1' we can use simple linear - * interpolation between the two end values 256/257 (result -368.61) and 258/257 - * (result 367.179). The values used below are scaled by a further 64 to give - * 16-bit precision in the interpolation: - * - * Start (256): -23591 - * Zero (257): 0 - * End (258): 23499 - */ -PNG_STATIC png_int_32 -png_log16bit(png_uint_32 x) -{ - unsigned int lg2 = 0; - - /* As above, but now the input has 16 bits. */ - if ((x &= 0xffff) == 0) - return 0xffffffff; - - if ((x & 0xff00) == 0) - lg2 = 8, x <<= 8; - - if ((x & 0xf000) == 0) - lg2 += 4, x <<= 4; - - if ((x & 0xc000) == 0) - lg2 += 2, x <<= 2; - - if ((x & 0x8000) == 0) - lg2 += 1, x <<= 1; - - /* Calculate the base logarithm from the top 8 bits as a 28-bit fractional - * value. - */ - lg2 <<= 28; - lg2 += (png_8bit_l2[(x>>8)-128]+8) >> 4; - - /* Now we need to interpolate the factor, this requires a division by the top - * 8 bits. Do this with maximum precision. - */ - x = ((x << 16) + (x >> 9)) / (x >> 8); - - /* Since we divided by the top 8 bits of 'x' there will be a '1' at 1<<24, - * the value at 1<<16 (ignoring this) will be 0 or 1; this gives us exactly - * 16 bits to interpolate to get the low bits of the result. Round the - * answer. Note that the end point values are scaled by 64 to retain overall - * precision and that 'lg2' is current scaled by an extra 12 bits, so adjust - * the overall scaling by 6-12. Round at every step. - */ - x -= 1U << 24; - - if (x <= 65536U) /* <= '257' */ - lg2 += ((23591U * (65536U-x)) + (1U << (16+6-12-1))) >> (16+6-12); - - else - lg2 -= ((23499U * (x-65536U)) + (1U << (16+6-12-1))) >> (16+6-12); - - /* Safe, because the result can't have more than 20 bits: */ - return (png_int_32)((lg2 + 2048) >> 12); -} - -/* The 'exp()' case must invert the above, taking a 20-bit fixed point - * logarithmic value and returning a 16 or 8-bit number as appropriate. In - * each case only the low 16 bits are relevant - the fraction - since the - * integer bits (the top 4) simply determine a shift. - * - * The worst case is the 16-bit distinction between 65535 and 65534, this - * requires perhaps spurious accuracy in the decoding of the logarithm to - * distinguish log2(65535/65534.5) - 10^-5 or 17 bits. There is little chance - * of getting this accuracy in practice. - * - * To deal with this the following exp() function works out the exponent of the - * frational part of the logarithm by using an accurate 32-bit value from the - * top four fractional bits then multiplying in the remaining bits. - */ -static png_uint_32 -png_32bit_exp[16] = -{ -# ifdef PNG_DO_BC - for (i=0;i<16;++i) { .5 + e(-i/16*l(2))*2^32; } -# else - /* NOTE: the first entry is deliberately set to the maximum 32-bit value. */ - 4294967295U, 4112874773U, 3938502376U, 3771522796U, 3611622603U, 3458501653U, - 3311872529U, 3171459999U, 3037000500U, 2908241642U, 2784941738U, 2666869345U, - 2553802834U, 2445529972U, 2341847524U, 2242560872U -# endif -}; - -/* Adjustment table; provided to explain the numbers in the code below. */ -#ifdef PNG_DO_BC -for (i=11;i>=0;--i){ print i, " ", (1 - e(-(2^i)/65536*l(2))) * 2^(32-i), "\n"} - 11 44937.64284865548751208448 - 10 45180.98734845585101160448 - 9 45303.31936980687359311872 - 8 45364.65110595323018870784 - 7 45395.35850361789624614912 - 6 45410.72259715102037508096 - 5 45418.40724413220722311168 - 4 45422.25021786898173001728 - 3 45424.17186732298419044352 - 2 45425.13273269940811464704 - 1 45425.61317555035558641664 - 0 45425.85339951654943850496 -#endif - -PNG_STATIC png_uint_32 -png_exp(png_fixed_point x) -{ - if (x > 0 && x <= 0xfffff) /* Else overflow or zero (underflow) */ - { - /* Obtain a 4-bit approximation */ - png_uint_32 e = png_32bit_exp[(x >> 12) & 0xf]; - - /* Incorporate the low 12 bits - these decrease the returned value by - * multiplying by a number less than 1 if the bit is set. The multiplier - * is determined by the above table and the shift. Notice that the values - * converge on 45426 and this is used to allow linear interpolation of the - * low bits. - */ - if (x & 0x800) - e -= (((e >> 16) * 44938U) + 16U) >> 5; - - if (x & 0x400) - e -= (((e >> 16) * 45181U) + 32U) >> 6; - - if (x & 0x200) - e -= (((e >> 16) * 45303U) + 64U) >> 7; - - if (x & 0x100) - e -= (((e >> 16) * 45365U) + 128U) >> 8; - - if (x & 0x080) - e -= (((e >> 16) * 45395U) + 256U) >> 9; - - if (x & 0x040) - e -= (((e >> 16) * 45410U) + 512U) >> 10; - - /* And handle the low 6 bits in a single block. */ - e -= (((e >> 16) * 355U * (x & 0x3fU)) + 256U) >> 9; - - /* Handle the upper bits of x. */ - e >>= x >> 16; - return e; - } - - /* Check for overflow */ - if (x <= 0) - return png_32bit_exp[0]; - - /* Else underflow */ - return 0; -} - -PNG_STATIC png_byte -png_exp8bit(png_fixed_point lg2) -{ - /* Get a 32-bit value: */ - png_uint_32 x = png_exp(lg2); - - /* Convert the 32-bit value to 0..255 by multiplying by 256-1, note that the - * second, rounding, step can't overflow because of the first, subtraction, - * step. - */ - x -= x >> 8; - return (png_byte)((x + 0x7fffffU) >> 24); -} - -PNG_STATIC png_uint_16 -png_exp16bit(png_fixed_point lg2) -{ - /* Get a 32-bit value: */ - png_uint_32 x = png_exp(lg2); - - /* Convert the 32-bit value to 0..65535 by multiplying by 65536-1: */ - x -= x >> 16; - return (png_uint_16)((x + 32767U) >> 16); -} -#endif /* FLOATING_ARITHMETIC */ - -png_byte -png_gamma_8bit_correct(unsigned int value, png_fixed_point gamma_val) -{ - if (value > 0 && value < 255) - { -# ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED - double r = floor(255*pow(value/255.,gamma_val*.00001)+.5); - return (png_byte)r; -# else - png_int_32 lg2 = png_log8bit(value); - png_fixed_point res; - - if (png_muldiv(&res, gamma_val, lg2, PNG_FP_1)) - return png_exp8bit(res); - - /* Overflow. */ - value = 0; -# endif - } - - return (png_byte)value; -} - -png_uint_16 -png_gamma_16bit_correct(unsigned int value, png_fixed_point gamma_val) -{ - if (value > 0 && value < 65535) - { -# ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED - double r = floor(65535*pow(value/65535.,gamma_val*.00001)+.5); - return (png_uint_16)r; -# else - png_int_32 lg2 = png_log16bit(value); - png_fixed_point res; - - if (png_muldiv(&res, gamma_val, lg2, PNG_FP_1)) - return png_exp16bit(res); - - /* Overflow. */ - value = 0; -# endif - } - - return (png_uint_16)value; -} - -/* This does the right thing based on the bit_depth field of the - * png_struct, interpreting values as 8-bit or 16-bit. While the result - * is nominally a 16-bit value if bit depth is 8 then the result is - * 8-bit (as are the arguments.) - */ -png_uint_16 /* PRIVATE */ -png_gamma_correct(png_structp png_ptr, unsigned int value, - png_fixed_point gamma_val) -{ - if (png_ptr->bit_depth == 8) - return png_gamma_8bit_correct(value, gamma_val); - - else - return png_gamma_16bit_correct(value, gamma_val); -} - -/* This is the shared test on whether a gamma value is 'significant' - whether - * it is worth doing gamma correction. - */ -int /* PRIVATE */ -png_gamma_significant(png_fixed_point gamma_val) -{ - return gamma_val < PNG_FP_1 - PNG_GAMMA_THRESHOLD_FIXED || - gamma_val > PNG_FP_1 + PNG_GAMMA_THRESHOLD_FIXED; -} - -/* Internal function to build a single 16-bit table - the table consists of - * 'num' 256-entry subtables, where 'num' is determined by 'shift' - the amount - * to shift the input values right (or 16-number_of_signifiant_bits). - * - * The caller is responsible for ensuring that the table gets cleaned up on - * png_error (i.e. if one of the mallocs below fails) - i.e. the *table argument - * should be somewhere that will be cleaned. - */ -static void -png_build_16bit_table(png_structp png_ptr, png_uint_16pp *ptable, - PNG_CONST unsigned int shift, PNG_CONST png_fixed_point gamma_val) -{ - /* Various values derived from 'shift': */ - PNG_CONST unsigned int num = 1U << (8U - shift); - PNG_CONST unsigned int max = (1U << (16U - shift))-1U; - PNG_CONST unsigned int max_by_2 = 1U << (15U-shift); - unsigned int i; - - png_uint_16pp table = *ptable = - (png_uint_16pp)png_calloc(png_ptr, num * png_sizeof(png_uint_16p)); - - for (i = 0; i < num; i++) - { - png_uint_16p sub_table = table[i] = - (png_uint_16p)png_malloc(png_ptr, 256 * png_sizeof(png_uint_16)); - - /* The 'threshold' test is repeated here because it can arise for one of - * the 16-bit tables even if the others don't hit it. - */ - if (png_gamma_significant(gamma_val)) - { - /* The old code would overflow at the end and this would cause the - * 'pow' function to return a result >1, resulting in an - * arithmetic error. This code follows the spec exactly; ig is - * the recovered input sample, it always has 8-16 bits. - * - * We want input * 65535/max, rounded, the arithmetic fits in 32 - * bits (unsigned) so long as max <= 32767. - */ - unsigned int j; - for (j = 0; j < 256; j++) - { - png_uint_32 ig = (j << (8-shift)) + i; -# ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED - /* Inline the 'max' scaling operation: */ - double d = floor(65535*pow(ig/(double)max, gamma_val*.00001)+.5); - sub_table[j] = (png_uint_16)d; -# else - if (shift) - ig = (ig * 65535U + max_by_2)/max; - - sub_table[j] = png_gamma_16bit_correct(ig, gamma_val); -# endif - } - } - else - { - /* We must still build a table, but do it the fast way. */ - unsigned int j; - - for (j = 0; j < 256; j++) - { - png_uint_32 ig = (j << (8-shift)) + i; - - if (shift) - ig = (ig * 65535U + max_by_2)/max; - - sub_table[j] = (png_uint_16)ig; - } - } - } -} - -/* NOTE: this function expects the *inverse* of the overall gamma transformation - * required. - */ -static void -png_build_16to8_table(png_structp png_ptr, png_uint_16pp *ptable, - PNG_CONST unsigned int shift, PNG_CONST png_fixed_point gamma_val) -{ - PNG_CONST unsigned int num = 1U << (8U - shift); - PNG_CONST unsigned int max = (1U << (16U - shift))-1U; - unsigned int i; - png_uint_32 last; - - png_uint_16pp table = *ptable = - (png_uint_16pp)png_calloc(png_ptr, num * png_sizeof(png_uint_16p)); - - /* 'num' is the number of tables and also the number of low bits of the - * input 16-bit value used to select a table. Each table is itself indexed - * by the high 8 bits of the value. - */ - for (i = 0; i < num; i++) - table[i] = (png_uint_16p)png_malloc(png_ptr, - 256 * png_sizeof(png_uint_16)); - - /* 'gamma_val' is set to the reciprocal of the value calculated above, so - * pow(out,g) is an *input* value. 'last' is the last input value set. - * - * In the loop 'i' is used to find output values. Since the output is - * 8-bit there are only 256 possible values. The tables are set up to - * select the closest possible output value for each input by finding - * the input value at the boundary between each pair of output values - * and filling the table up to that boundary with the lower output - * value. - * - * The boundary values are 0.5,1.5..253.5,254.5. Since these are 9-bit - * values the code below uses a 16-bit value in i; the values start at - * 128.5 (for 0.5) and step by 257, for a total of 254 values (the last - * entries are filled with 255). Start i at 128 and fill all 'last' - * table entries <= 'max' - */ - last = 0; - for (i = 0; i < 255; ++i) /* 8-bit output value */ - { - /* Find the corresponding maximum input value */ - png_uint_16 out = (png_uint_16)(i * 257U); /* 16-bit output value */ - - /* Find the boundary value in 16 bits: */ - png_uint_32 bound = png_gamma_16bit_correct(out+128U, gamma_val); - - /* Adjust (round) to (16-shift) bits: */ - bound = (bound * max + 32768U)/65535U + 1U; - - while (last < bound) - { - table[last & (0xffU >> shift)][last >> (8U - shift)] = out; - last++; - } - } - - /* And fill in the final entries. */ - while (last < (num << 8)) - { - table[last & (0xff >> shift)][last >> (8U - shift)] = 65535U; - last++; - } -} - -/* Build a single 8-bit table: same as the 16-bit case but much simpler (and - * typically much faster). Note that libpng currently does no sBIT processing - * (apparently contrary to the spec) so a 256-entry table is always generated. - */ -static void -png_build_8bit_table(png_structp png_ptr, png_bytepp ptable, - PNG_CONST png_fixed_point gamma_val) -{ - unsigned int i; - png_bytep table = *ptable = (png_bytep)png_malloc(png_ptr, 256); - - if (png_gamma_significant(gamma_val)) for (i=0; i<256; i++) - table[i] = png_gamma_8bit_correct(i, gamma_val); - - else for (i=0; i<256; ++i) - table[i] = (png_byte)i; -} - -/* Used from png_read_destroy and below to release the memory used by the gamma - * tables. - */ -void /* PRIVATE */ -png_destroy_gamma_table(png_structp png_ptr) -{ - png_free(png_ptr, png_ptr->gamma_table); - png_ptr->gamma_table = NULL; - - if (png_ptr->gamma_16_table != NULL) - { - int i; - int istop = (1 << (8 - png_ptr->gamma_shift)); - for (i = 0; i < istop; i++) - { - png_free(png_ptr, png_ptr->gamma_16_table[i]); - } - png_free(png_ptr, png_ptr->gamma_16_table); - png_ptr->gamma_16_table = NULL; - } - -#if defined(PNG_READ_BACKGROUND_SUPPORTED) || \ - defined(PNG_READ_ALPHA_MODE_SUPPORTED) || \ - defined(PNG_READ_RGB_TO_GRAY_SUPPORTED) - png_free(png_ptr, png_ptr->gamma_from_1); - png_ptr->gamma_from_1 = NULL; - png_free(png_ptr, png_ptr->gamma_to_1); - png_ptr->gamma_to_1 = NULL; - - if (png_ptr->gamma_16_from_1 != NULL) - { - int i; - int istop = (1 << (8 - png_ptr->gamma_shift)); - for (i = 0; i < istop; i++) - { - png_free(png_ptr, png_ptr->gamma_16_from_1[i]); - } - png_free(png_ptr, png_ptr->gamma_16_from_1); - png_ptr->gamma_16_from_1 = NULL; - } - if (png_ptr->gamma_16_to_1 != NULL) - { - int i; - int istop = (1 << (8 - png_ptr->gamma_shift)); - for (i = 0; i < istop; i++) - { - png_free(png_ptr, png_ptr->gamma_16_to_1[i]); - } - png_free(png_ptr, png_ptr->gamma_16_to_1); - png_ptr->gamma_16_to_1 = NULL; - } -#endif /* READ_BACKGROUND || READ_ALPHA_MODE || RGB_TO_GRAY */ -} - -/* We build the 8- or 16-bit gamma tables here. Note that for 16-bit - * tables, we don't make a full table if we are reducing to 8-bit in - * the future. Note also how the gamma_16 tables are segmented so that - * we don't need to allocate > 64K chunks for a full 16-bit table. - */ -void /* PRIVATE */ -png_build_gamma_table(png_structp png_ptr, int bit_depth) -{ - png_debug(1, "in png_build_gamma_table"); - - /* Remove any existing table; this copes with multiple calls to - * png_read_update_info. The warning is because building the gamma tables - * multiple times is a performance hit - it's harmless but the ability to call - * png_read_update_info() multiple times is new in 1.5.6 so it seems sensible - * to warn if the app introduces such a hit. - */ - if (png_ptr->gamma_table != NULL || png_ptr->gamma_16_table != NULL) - { - png_warning(png_ptr, "gamma table being rebuilt"); - png_destroy_gamma_table(png_ptr); - } - - if (bit_depth <= 8) - { - png_build_8bit_table(png_ptr, &png_ptr->gamma_table, - png_ptr->screen_gamma > 0 ? png_reciprocal2(png_ptr->gamma, - png_ptr->screen_gamma) : PNG_FP_1); - -#if defined(PNG_READ_BACKGROUND_SUPPORTED) || \ - defined(PNG_READ_ALPHA_MODE_SUPPORTED) || \ - defined(PNG_READ_RGB_TO_GRAY_SUPPORTED) - if (png_ptr->transformations & (PNG_COMPOSE | PNG_RGB_TO_GRAY)) - { - png_build_8bit_table(png_ptr, &png_ptr->gamma_to_1, - png_reciprocal(png_ptr->gamma)); - - png_build_8bit_table(png_ptr, &png_ptr->gamma_from_1, - png_ptr->screen_gamma > 0 ? png_reciprocal(png_ptr->screen_gamma) : - png_ptr->gamma/* Probably doing rgb_to_gray */); - } -#endif /* READ_BACKGROUND || READ_ALPHA_MODE || RGB_TO_GRAY */ - } - else - { - png_byte shift, sig_bit; - - if (png_ptr->color_type & PNG_COLOR_MASK_COLOR) - { - sig_bit = png_ptr->sig_bit.red; - - if (png_ptr->sig_bit.green > sig_bit) - sig_bit = png_ptr->sig_bit.green; - - if (png_ptr->sig_bit.blue > sig_bit) - sig_bit = png_ptr->sig_bit.blue; - } - else - sig_bit = png_ptr->sig_bit.gray; - - /* 16-bit gamma code uses this equation: - * - * ov = table[(iv & 0xff) >> gamma_shift][iv >> 8] - * - * Where 'iv' is the input color value and 'ov' is the output value - - * pow(iv, gamma). - * - * Thus the gamma table consists of up to 256 256-entry tables. The table - * is selected by the (8-gamma_shift) most significant of the low 8 bits of - * the color value then indexed by the upper 8 bits: - * - * table[low bits][high 8 bits] - * - * So the table 'n' corresponds to all those 'iv' of: - * - * ..<(n+1 << gamma_shift)-1> - * - */ - if (sig_bit > 0 && sig_bit < 16U) - shift = (png_byte)(16U - sig_bit); /* shift == insignificant bits */ - - else - shift = 0; /* keep all 16 bits */ - - if (png_ptr->transformations & (PNG_16_TO_8 | PNG_SCALE_16_TO_8)) - { - /* PNG_MAX_GAMMA_8 is the number of bits to keep - effectively - * the significant bits in the *input* when the output will - * eventually be 8 bits. By default it is 11. - */ - if (shift < (16U - PNG_MAX_GAMMA_8)) - shift = (16U - PNG_MAX_GAMMA_8); - } - - if (shift > 8U) - shift = 8U; /* Guarantees at least one table! */ - - png_ptr->gamma_shift = shift; - -#ifdef PNG_16BIT_SUPPORTED - /* NOTE: prior to 1.5.4 this test used to include PNG_BACKGROUND (now - * PNG_COMPOSE). This effectively smashed the background calculation for - * 16-bit output because the 8-bit table assumes the result will be reduced - * to 8 bits. - */ - if (png_ptr->transformations & (PNG_16_TO_8 | PNG_SCALE_16_TO_8)) -#endif - png_build_16to8_table(png_ptr, &png_ptr->gamma_16_table, shift, - png_ptr->screen_gamma > 0 ? png_product2(png_ptr->gamma, - png_ptr->screen_gamma) : PNG_FP_1); - -#ifdef PNG_16BIT_SUPPORTED - else - png_build_16bit_table(png_ptr, &png_ptr->gamma_16_table, shift, - png_ptr->screen_gamma > 0 ? png_reciprocal2(png_ptr->gamma, - png_ptr->screen_gamma) : PNG_FP_1); -#endif - -#if defined(PNG_READ_BACKGROUND_SUPPORTED) || \ - defined(PNG_READ_ALPHA_MODE_SUPPORTED) || \ - defined(PNG_READ_RGB_TO_GRAY_SUPPORTED) - if (png_ptr->transformations & (PNG_COMPOSE | PNG_RGB_TO_GRAY)) - { - png_build_16bit_table(png_ptr, &png_ptr->gamma_16_to_1, shift, - png_reciprocal(png_ptr->gamma)); - - /* Notice that the '16 from 1' table should be full precision, however - * the lookup on this table still uses gamma_shift, so it can't be. - * TODO: fix this. - */ - png_build_16bit_table(png_ptr, &png_ptr->gamma_16_from_1, shift, - png_ptr->screen_gamma > 0 ? png_reciprocal(png_ptr->screen_gamma) : - png_ptr->gamma/* Probably doing rgb_to_gray */); - } -#endif /* READ_BACKGROUND || READ_ALPHA_MODE || RGB_TO_GRAY */ - } -} -#endif /* READ_GAMMA */ -#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */ diff --git a/extern/libpng/include/png.h b/extern/libpng/include/png.h deleted file mode 100644 index 4e0dee1793..0000000000 --- a/extern/libpng/include/png.h +++ /dev/null @@ -1,2666 +0,0 @@ - -/* png.h - header file for PNG reference library - * - * libpng version 1.5.10 - March 29, 2012 - * Copyright (c) 1998-2012 Glenn Randers-Pehrson - * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) - * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) - * - * This code is released under the libpng license (See LICENSE, below) - * - * Authors and maintainers: - * libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat - * libpng versions 0.89c, June 1996, through 0.96, May 1997: Andreas Dilger - * libpng versions 0.97, January 1998, through 1.5.10 - March 29, 2012: Glenn - * See also "Contributing Authors", below. - * - * Note about libpng version numbers: - * - * Due to various miscommunications, unforeseen code incompatibilities - * and occasional factors outside the authors' control, version numbering - * on the library has not always been consistent and straightforward. - * The following table summarizes matters since version 0.89c, which was - * the first widely used release: - * - * source png.h png.h shared-lib - * version string int version - * ------- ------ ----- ---------- - * 0.89c "1.0 beta 3" 0.89 89 1.0.89 - * 0.90 "1.0 beta 4" 0.90 90 0.90 [should have been 2.0.90] - * 0.95 "1.0 beta 5" 0.95 95 0.95 [should have been 2.0.95] - * 0.96 "1.0 beta 6" 0.96 96 0.96 [should have been 2.0.96] - * 0.97b "1.00.97 beta 7" 1.00.97 97 1.0.1 [should have been 2.0.97] - * 0.97c 0.97 97 2.0.97 - * 0.98 0.98 98 2.0.98 - * 0.99 0.99 98 2.0.99 - * 0.99a-m 0.99 99 2.0.99 - * 1.00 1.00 100 2.1.0 [100 should be 10000] - * 1.0.0 (from here on, the 100 2.1.0 [100 should be 10000] - * 1.0.1 png.h string is 10001 2.1.0 - * 1.0.1a-e identical to the 10002 from here on, the shared library - * 1.0.2 source version) 10002 is 2.V where V is the source code - * 1.0.2a-b 10003 version, except as noted. - * 1.0.3 10003 - * 1.0.3a-d 10004 - * 1.0.4 10004 - * 1.0.4a-f 10005 - * 1.0.5 (+ 2 patches) 10005 - * 1.0.5a-d 10006 - * 1.0.5e-r 10100 (not source compatible) - * 1.0.5s-v 10006 (not binary compatible) - * 1.0.6 (+ 3 patches) 10006 (still binary incompatible) - * 1.0.6d-f 10007 (still binary incompatible) - * 1.0.6g 10007 - * 1.0.6h 10007 10.6h (testing xy.z so-numbering) - * 1.0.6i 10007 10.6i - * 1.0.6j 10007 2.1.0.6j (incompatible with 1.0.0) - * 1.0.7beta11-14 DLLNUM 10007 2.1.0.7beta11-14 (binary compatible) - * 1.0.7beta15-18 1 10007 2.1.0.7beta15-18 (binary compatible) - * 1.0.7rc1-2 1 10007 2.1.0.7rc1-2 (binary compatible) - * 1.0.7 1 10007 (still compatible) - * 1.0.8beta1-4 1 10008 2.1.0.8beta1-4 - * 1.0.8rc1 1 10008 2.1.0.8rc1 - * 1.0.8 1 10008 2.1.0.8 - * 1.0.9beta1-6 1 10009 2.1.0.9beta1-6 - * 1.0.9rc1 1 10009 2.1.0.9rc1 - * 1.0.9beta7-10 1 10009 2.1.0.9beta7-10 - * 1.0.9rc2 1 10009 2.1.0.9rc2 - * 1.0.9 1 10009 2.1.0.9 - * 1.0.10beta1 1 10010 2.1.0.10beta1 - * 1.0.10rc1 1 10010 2.1.0.10rc1 - * 1.0.10 1 10010 2.1.0.10 - * 1.0.11beta1-3 1 10011 2.1.0.11beta1-3 - * 1.0.11rc1 1 10011 2.1.0.11rc1 - * 1.0.11 1 10011 2.1.0.11 - * 1.0.12beta1-2 2 10012 2.1.0.12beta1-2 - * 1.0.12rc1 2 10012 2.1.0.12rc1 - * 1.0.12 2 10012 2.1.0.12 - * 1.1.0a-f - 10100 2.1.1.0a-f (branch abandoned) - * 1.2.0beta1-2 2 10200 2.1.2.0beta1-2 - * 1.2.0beta3-5 3 10200 3.1.2.0beta3-5 - * 1.2.0rc1 3 10200 3.1.2.0rc1 - * 1.2.0 3 10200 3.1.2.0 - * 1.2.1beta1-4 3 10201 3.1.2.1beta1-4 - * 1.2.1rc1-2 3 10201 3.1.2.1rc1-2 - * 1.2.1 3 10201 3.1.2.1 - * 1.2.2beta1-6 12 10202 12.so.0.1.2.2beta1-6 - * 1.0.13beta1 10 10013 10.so.0.1.0.13beta1 - * 1.0.13rc1 10 10013 10.so.0.1.0.13rc1 - * 1.2.2rc1 12 10202 12.so.0.1.2.2rc1 - * 1.0.13 10 10013 10.so.0.1.0.13 - * 1.2.2 12 10202 12.so.0.1.2.2 - * 1.2.3rc1-6 12 10203 12.so.0.1.2.3rc1-6 - * 1.2.3 12 10203 12.so.0.1.2.3 - * 1.2.4beta1-3 13 10204 12.so.0.1.2.4beta1-3 - * 1.0.14rc1 13 10014 10.so.0.1.0.14rc1 - * 1.2.4rc1 13 10204 12.so.0.1.2.4rc1 - * 1.0.14 10 10014 10.so.0.1.0.14 - * 1.2.4 13 10204 12.so.0.1.2.4 - * 1.2.5beta1-2 13 10205 12.so.0.1.2.5beta1-2 - * 1.0.15rc1-3 10 10015 10.so.0.1.0.15rc1-3 - * 1.2.5rc1-3 13 10205 12.so.0.1.2.5rc1-3 - * 1.0.15 10 10015 10.so.0.1.0.15 - * 1.2.5 13 10205 12.so.0.1.2.5 - * 1.2.6beta1-4 13 10206 12.so.0.1.2.6beta1-4 - * 1.0.16 10 10016 10.so.0.1.0.16 - * 1.2.6 13 10206 12.so.0.1.2.6 - * 1.2.7beta1-2 13 10207 12.so.0.1.2.7beta1-2 - * 1.0.17rc1 10 10017 12.so.0.1.0.17rc1 - * 1.2.7rc1 13 10207 12.so.0.1.2.7rc1 - * 1.0.17 10 10017 12.so.0.1.0.17 - * 1.2.7 13 10207 12.so.0.1.2.7 - * 1.2.8beta1-5 13 10208 12.so.0.1.2.8beta1-5 - * 1.0.18rc1-5 10 10018 12.so.0.1.0.18rc1-5 - * 1.2.8rc1-5 13 10208 12.so.0.1.2.8rc1-5 - * 1.0.18 10 10018 12.so.0.1.0.18 - * 1.2.8 13 10208 12.so.0.1.2.8 - * 1.2.9beta1-3 13 10209 12.so.0.1.2.9beta1-3 - * 1.2.9beta4-11 13 10209 12.so.0.9[.0] - * 1.2.9rc1 13 10209 12.so.0.9[.0] - * 1.2.9 13 10209 12.so.0.9[.0] - * 1.2.10beta1-7 13 10210 12.so.0.10[.0] - * 1.2.10rc1-2 13 10210 12.so.0.10[.0] - * 1.2.10 13 10210 12.so.0.10[.0] - * 1.4.0beta1-5 14 10400 14.so.0.0[.0] - * 1.2.11beta1-4 13 10211 12.so.0.11[.0] - * 1.4.0beta7-8 14 10400 14.so.0.0[.0] - * 1.2.11 13 10211 12.so.0.11[.0] - * 1.2.12 13 10212 12.so.0.12[.0] - * 1.4.0beta9-14 14 10400 14.so.0.0[.0] - * 1.2.13 13 10213 12.so.0.13[.0] - * 1.4.0beta15-36 14 10400 14.so.0.0[.0] - * 1.4.0beta37-87 14 10400 14.so.14.0[.0] - * 1.4.0rc01 14 10400 14.so.14.0[.0] - * 1.4.0beta88-109 14 10400 14.so.14.0[.0] - * 1.4.0rc02-08 14 10400 14.so.14.0[.0] - * 1.4.0 14 10400 14.so.14.0[.0] - * 1.4.1beta01-03 14 10401 14.so.14.1[.0] - * 1.4.1rc01 14 10401 14.so.14.1[.0] - * 1.4.1beta04-12 14 10401 14.so.14.1[.0] - * 1.4.1 14 10401 14.so.14.1[.0] - * 1.4.2 14 10402 14.so.14.2[.0] - * 1.4.3 14 10403 14.so.14.3[.0] - * 1.4.4 14 10404 14.so.14.4[.0] - * 1.5.0beta01-58 15 10500 15.so.15.0[.0] - * 1.5.0rc01-07 15 10500 15.so.15.0[.0] - * 1.5.0 15 10500 15.so.15.0[.0] - * 1.5.1beta01-11 15 10501 15.so.15.1[.0] - * 1.5.1rc01-02 15 10501 15.so.15.1[.0] - * 1.5.1 15 10501 15.so.15.1[.0] - * 1.5.2beta01-03 15 10502 15.so.15.2[.0] - * 1.5.2rc01-03 15 10502 15.so.15.2[.0] - * 1.5.2 15 10502 15.so.15.2[.0] - * 1.5.3beta01-10 15 10503 15.so.15.3[.0] - * 1.5.3rc01-02 15 10503 15.so.15.3[.0] - * 1.5.3beta11 15 10503 15.so.15.3[.0] - * 1.5.3 [omitted] - * 1.5.4beta01-08 15 10504 15.so.15.4[.0] - * 1.5.4rc01 15 10504 15.so.15.4[.0] - * 1.5.4 15 10504 15.so.15.4[.0] - * 1.5.5beta01-08 15 10505 15.so.15.5[.0] - * 1.5.5rc01 15 10505 15.so.15.5[.0] - * 1.5.5 15 10505 15.so.15.5[.0] - * 1.5.6beta01-07 15 10506 15.so.15.6[.0] - * 1.5.6rc01-03 15 10506 15.so.15.6[.0] - * 1.5.6 15 10506 15.so.15.6[.0] - * 1.5.7beta01-05 15 10507 15.so.15.7[.0] - * 1.5.7rc01-03 15 10507 15.so.15.7[.0] - * 1.5.7 15 10507 15.so.15.7[.0] - * 1.5.8beta01 15 10508 15.so.15.8[.0] - * 1.5.8rc01 15 10508 15.so.15.8[.0] - * 1.5.8 15 10508 15.so.15.8[.0] - * 1.5.9beta01-02 15 10509 15.so.15.9[.0] - * 1.5.9rc01 15 10509 15.so.15.9[.0] - * 1.5.9 15 10509 15.so.15.9[.0] - * 1.5.10beta01-05 15 10510 15.so.15.10[.0] - * 1.5.10 15 10510 15.so.15.10[.0] - * - * Henceforth the source version will match the shared-library major - * and minor numbers; the shared-library major version number will be - * used for changes in backward compatibility, as it is intended. The - * PNG_LIBPNG_VER macro, which is not used within libpng but is available - * for applications, is an unsigned integer of the form xyyzz corresponding - * to the source version x.y.z (leading zeros in y and z). Beta versions - * were given the previous public release number plus a letter, until - * version 1.0.6j; from then on they were given the upcoming public - * release number plus "betaNN" or "rcNN". - * - * Binary incompatibility exists only when applications make direct access - * to the info_ptr or png_ptr members through png.h, and the compiled - * application is loaded with a different version of the library. - * - * DLLNUM will change each time there are forward or backward changes - * in binary compatibility (e.g., when a new feature is added). - * - * See libpng-manual.txt or libpng.3 for more information. The PNG - * specification is available as a W3C Recommendation and as an ISO - * Specification, -# endif - - /* Need the time information for converting tIME chunks, it - * defines struct tm: - */ -# ifdef PNG_CONVERT_tIME_SUPPORTED - /* "time.h" functions are not supported on all operating systems */ -# include -# endif -# endif - -/* Machine specific configuration. */ -# include "pngconf.h" -#endif - -/* - * Added at libpng-1.2.8 - * - * Ref MSDN: Private as priority over Special - * VS_FF_PRIVATEBUILD File *was not* built using standard release - * procedures. If this value is given, the StringFileInfo block must - * contain a PrivateBuild string. - * - * VS_FF_SPECIALBUILD File *was* built by the original company using - * standard release procedures but is a variation of the standard - * file of the same version number. If this value is given, the - * StringFileInfo block must contain a SpecialBuild string. - */ - -#ifdef PNG_USER_PRIVATEBUILD /* From pnglibconf.h */ -# define PNG_LIBPNG_BUILD_TYPE \ - (PNG_LIBPNG_BUILD_BASE_TYPE | PNG_LIBPNG_BUILD_PRIVATE) -#else -# ifdef PNG_LIBPNG_SPECIALBUILD -# define PNG_LIBPNG_BUILD_TYPE \ - (PNG_LIBPNG_BUILD_BASE_TYPE | PNG_LIBPNG_BUILD_SPECIAL) -# else -# define PNG_LIBPNG_BUILD_TYPE (PNG_LIBPNG_BUILD_BASE_TYPE) -# endif -#endif - -#ifndef PNG_VERSION_INFO_ONLY - -/* Inhibit C++ name-mangling for libpng functions but not for system calls. */ -#ifdef __cplusplus -extern "C" { -#endif /* __cplusplus */ - -/* Version information for C files, stored in png.c. This had better match - * the version above. - */ -#define png_libpng_ver png_get_header_ver(NULL) - -/* This file is arranged in several sections: - * - * 1. Any configuration options that can be specified by for the application - * code when it is built. (Build time configuration is in pnglibconf.h) - * 2. Type definitions (base types are defined in pngconf.h), structure - * definitions. - * 3. Exported library functions. - * - * The library source code has additional files (principally pngpriv.h) that - * allow configuration of the library. - */ -/* Section 1: run time configuration - * See pnglibconf.h for build time configuration - * - * Run time configuration allows the application to choose between - * implementations of certain arithmetic APIs. The default is set - * at build time and recorded in pnglibconf.h, but it is safe to - * override these (and only these) settings. Note that this won't - * change what the library does, only application code, and the - * settings can (and probably should) be made on a per-file basis - * by setting the #defines before including png.h - * - * Use macros to read integers from PNG data or use the exported - * functions? - * PNG_USE_READ_MACROS: use the macros (see below) Note that - * the macros evaluate their argument multiple times. - * PNG_NO_USE_READ_MACROS: call the relevant library function. - * - * Use the alternative algorithm for compositing alpha samples that - * does not use division? - * PNG_READ_COMPOSITE_NODIV_SUPPORTED: use the 'no division' - * algorithm. - * PNG_NO_READ_COMPOSITE_NODIV: use the 'division' algorithm. - * - * How to handle benign errors if PNG_ALLOW_BENIGN_ERRORS is - * false? - * PNG_ALLOW_BENIGN_ERRORS: map calls to the benign error - * APIs to png_warning. - * Otherwise the calls are mapped to png_error. - */ - -/* Section 2: type definitions, including structures and compile time - * constants. - * See pngconf.h for base types that vary by machine/system - */ - -/* This triggers a compiler error in png.c, if png.c and png.h - * do not agree upon the version number. - */ -typedef char* png_libpng_version_1_5_10; - -/* Three color definitions. The order of the red, green, and blue, (and the - * exact size) is not important, although the size of the fields need to - * be png_byte or png_uint_16 (as defined below). - */ -typedef struct png_color_struct -{ - png_byte red; - png_byte green; - png_byte blue; -} png_color; -typedef png_color FAR * png_colorp; -typedef PNG_CONST png_color FAR * png_const_colorp; -typedef png_color FAR * FAR * png_colorpp; - -typedef struct png_color_16_struct -{ - png_byte index; /* used for palette files */ - png_uint_16 red; /* for use in red green blue files */ - png_uint_16 green; - png_uint_16 blue; - png_uint_16 gray; /* for use in grayscale files */ -} png_color_16; -typedef png_color_16 FAR * png_color_16p; -typedef PNG_CONST png_color_16 FAR * png_const_color_16p; -typedef png_color_16 FAR * FAR * png_color_16pp; - -typedef struct png_color_8_struct -{ - png_byte red; /* for use in red green blue files */ - png_byte green; - png_byte blue; - png_byte gray; /* for use in grayscale files */ - png_byte alpha; /* for alpha channel files */ -} png_color_8; -typedef png_color_8 FAR * png_color_8p; -typedef PNG_CONST png_color_8 FAR * png_const_color_8p; -typedef png_color_8 FAR * FAR * png_color_8pp; - -/* - * The following two structures are used for the in-core representation - * of sPLT chunks. - */ -typedef struct png_sPLT_entry_struct -{ - png_uint_16 red; - png_uint_16 green; - png_uint_16 blue; - png_uint_16 alpha; - png_uint_16 frequency; -} png_sPLT_entry; -typedef png_sPLT_entry FAR * png_sPLT_entryp; -typedef PNG_CONST png_sPLT_entry FAR * png_const_sPLT_entryp; -typedef png_sPLT_entry FAR * FAR * png_sPLT_entrypp; - -/* When the depth of the sPLT palette is 8 bits, the color and alpha samples - * occupy the LSB of their respective members, and the MSB of each member - * is zero-filled. The frequency member always occupies the full 16 bits. - */ - -typedef struct png_sPLT_struct -{ - png_charp name; /* palette name */ - png_byte depth; /* depth of palette samples */ - png_sPLT_entryp entries; /* palette entries */ - png_int_32 nentries; /* number of palette entries */ -} png_sPLT_t; -typedef png_sPLT_t FAR * png_sPLT_tp; -typedef PNG_CONST png_sPLT_t FAR * png_const_sPLT_tp; -typedef png_sPLT_t FAR * FAR * png_sPLT_tpp; - -#ifdef PNG_TEXT_SUPPORTED -/* png_text holds the contents of a text/ztxt/itxt chunk in a PNG file, - * and whether that contents is compressed or not. The "key" field - * points to a regular zero-terminated C string. The "text" fields can be a - * regular C string, an empty string, or a NULL pointer. - * However, the structure returned by png_get_text() will always contain - * the "text" field as a regular zero-terminated C string (possibly - * empty), never a NULL pointer, so it can be safely used in printf() and - * other string-handling functions. Note that the "itxt_length", "lang", and - * "lang_key" members of the structure only exist when the library is built - * with iTXt chunk support. Prior to libpng-1.4.0 the library was built by - * default without iTXt support. Also note that when iTXt *is* supported, - * the "lang" and "lang_key" fields contain NULL pointers when the - * "compression" field contains * PNG_TEXT_COMPRESSION_NONE or - * PNG_TEXT_COMPRESSION_zTXt. Note that the "compression value" is not the - * same as what appears in the PNG tEXt/zTXt/iTXt chunk's "compression flag" - * which is always 0 or 1, or its "compression method" which is always 0. - */ -typedef struct png_text_struct -{ - int compression; /* compression value: - -1: tEXt, none - 0: zTXt, deflate - 1: iTXt, none - 2: iTXt, deflate */ - png_charp key; /* keyword, 1-79 character description of "text" */ - png_charp text; /* comment, may be an empty string (ie "") - or a NULL pointer */ - png_size_t text_length; /* length of the text string */ - png_size_t itxt_length; /* length of the itxt string */ - png_charp lang; /* language code, 0-79 characters - or a NULL pointer */ - png_charp lang_key; /* keyword translated UTF-8 string, 0 or more - chars or a NULL pointer */ -} png_text; -typedef png_text FAR * png_textp; -typedef PNG_CONST png_text FAR * png_const_textp; -typedef png_text FAR * FAR * png_textpp; -#endif - -/* Supported compression types for text in PNG files (tEXt, and zTXt). - * The values of the PNG_TEXT_COMPRESSION_ defines should NOT be changed. */ -#define PNG_TEXT_COMPRESSION_NONE_WR -3 -#define PNG_TEXT_COMPRESSION_zTXt_WR -2 -#define PNG_TEXT_COMPRESSION_NONE -1 -#define PNG_TEXT_COMPRESSION_zTXt 0 -#define PNG_ITXT_COMPRESSION_NONE 1 -#define PNG_ITXT_COMPRESSION_zTXt 2 -#define PNG_TEXT_COMPRESSION_LAST 3 /* Not a valid value */ - -/* png_time is a way to hold the time in an machine independent way. - * Two conversions are provided, both from time_t and struct tm. There - * is no portable way to convert to either of these structures, as far - * as I know. If you know of a portable way, send it to me. As a side - * note - PNG has always been Year 2000 compliant! - */ -typedef struct png_time_struct -{ - png_uint_16 year; /* full year, as in, 1995 */ - png_byte month; /* month of year, 1 - 12 */ - png_byte day; /* day of month, 1 - 31 */ - png_byte hour; /* hour of day, 0 - 23 */ - png_byte minute; /* minute of hour, 0 - 59 */ - png_byte second; /* second of minute, 0 - 60 (for leap seconds) */ -} png_time; -typedef png_time FAR * png_timep; -typedef PNG_CONST png_time FAR * png_const_timep; -typedef png_time FAR * FAR * png_timepp; - -#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) || \ - defined(PNG_HANDLE_AS_UNKNOWN_SUPPORTED) -/* png_unknown_chunk is a structure to hold queued chunks for which there is - * no specific support. The idea is that we can use this to queue - * up private chunks for output even though the library doesn't actually - * know about their semantics. - */ -typedef struct png_unknown_chunk_t -{ - png_byte name[5]; - png_byte *data; - png_size_t size; - - /* libpng-using applications should NOT directly modify this byte. */ - png_byte location; /* mode of operation at read time */ -} - - -png_unknown_chunk; -typedef png_unknown_chunk FAR * png_unknown_chunkp; -typedef PNG_CONST png_unknown_chunk FAR * png_const_unknown_chunkp; -typedef png_unknown_chunk FAR * FAR * png_unknown_chunkpp; -#endif - -/* Values for the unknown chunk location byte */ - -#define PNG_HAVE_IHDR 0x01 -#define PNG_HAVE_PLTE 0x02 -#define PNG_AFTER_IDAT 0x08 - -/* The complete definition of png_info has, as of libpng-1.5.0, - * been moved into a separate header file that is not accessible to - * applications. Read libpng-manual.txt or libpng.3 for more info. - */ -typedef struct png_info_def png_info; -typedef png_info FAR * png_infop; -typedef PNG_CONST png_info FAR * png_const_infop; -typedef png_info FAR * FAR * png_infopp; - -/* Maximum positive integer used in PNG is (2^31)-1 */ -#define PNG_UINT_31_MAX ((png_uint_32)0x7fffffffL) -#define PNG_UINT_32_MAX ((png_uint_32)(-1)) -#define PNG_SIZE_MAX ((png_size_t)(-1)) - -/* These are constants for fixed point values encoded in the - * PNG specification manner (x100000) - */ -#define PNG_FP_1 100000 -#define PNG_FP_HALF 50000 -#define PNG_FP_MAX ((png_fixed_point)0x7fffffffL) -#define PNG_FP_MIN (-PNG_FP_MAX) - -/* These describe the color_type field in png_info. */ -/* color type masks */ -#define PNG_COLOR_MASK_PALETTE 1 -#define PNG_COLOR_MASK_COLOR 2 -#define PNG_COLOR_MASK_ALPHA 4 - -/* color types. Note that not all combinations are legal */ -#define PNG_COLOR_TYPE_GRAY 0 -#define PNG_COLOR_TYPE_PALETTE (PNG_COLOR_MASK_COLOR | PNG_COLOR_MASK_PALETTE) -#define PNG_COLOR_TYPE_RGB (PNG_COLOR_MASK_COLOR) -#define PNG_COLOR_TYPE_RGB_ALPHA (PNG_COLOR_MASK_COLOR | PNG_COLOR_MASK_ALPHA) -#define PNG_COLOR_TYPE_GRAY_ALPHA (PNG_COLOR_MASK_ALPHA) -/* aliases */ -#define PNG_COLOR_TYPE_RGBA PNG_COLOR_TYPE_RGB_ALPHA -#define PNG_COLOR_TYPE_GA PNG_COLOR_TYPE_GRAY_ALPHA - -/* This is for compression type. PNG 1.0-1.2 only define the single type. */ -#define PNG_COMPRESSION_TYPE_BASE 0 /* Deflate method 8, 32K window */ -#define PNG_COMPRESSION_TYPE_DEFAULT PNG_COMPRESSION_TYPE_BASE - -/* This is for filter type. PNG 1.0-1.2 only define the single type. */ -#define PNG_FILTER_TYPE_BASE 0 /* Single row per-byte filtering */ -#define PNG_INTRAPIXEL_DIFFERENCING 64 /* Used only in MNG datastreams */ -#define PNG_FILTER_TYPE_DEFAULT PNG_FILTER_TYPE_BASE - -/* These are for the interlacing type. These values should NOT be changed. */ -#define PNG_INTERLACE_NONE 0 /* Non-interlaced image */ -#define PNG_INTERLACE_ADAM7 1 /* Adam7 interlacing */ -#define PNG_INTERLACE_LAST 2 /* Not a valid value */ - -/* These are for the oFFs chunk. These values should NOT be changed. */ -#define PNG_OFFSET_PIXEL 0 /* Offset in pixels */ -#define PNG_OFFSET_MICROMETER 1 /* Offset in micrometers (1/10^6 meter) */ -#define PNG_OFFSET_LAST 2 /* Not a valid value */ - -/* These are for the pCAL chunk. These values should NOT be changed. */ -#define PNG_EQUATION_LINEAR 0 /* Linear transformation */ -#define PNG_EQUATION_BASE_E 1 /* Exponential base e transform */ -#define PNG_EQUATION_ARBITRARY 2 /* Arbitrary base exponential transform */ -#define PNG_EQUATION_HYPERBOLIC 3 /* Hyperbolic sine transformation */ -#define PNG_EQUATION_LAST 4 /* Not a valid value */ - -/* These are for the sCAL chunk. These values should NOT be changed. */ -#define PNG_SCALE_UNKNOWN 0 /* unknown unit (image scale) */ -#define PNG_SCALE_METER 1 /* meters per pixel */ -#define PNG_SCALE_RADIAN 2 /* radians per pixel */ -#define PNG_SCALE_LAST 3 /* Not a valid value */ - -/* These are for the pHYs chunk. These values should NOT be changed. */ -#define PNG_RESOLUTION_UNKNOWN 0 /* pixels/unknown unit (aspect ratio) */ -#define PNG_RESOLUTION_METER 1 /* pixels/meter */ -#define PNG_RESOLUTION_LAST 2 /* Not a valid value */ - -/* These are for the sRGB chunk. These values should NOT be changed. */ -#define PNG_sRGB_INTENT_PERCEPTUAL 0 -#define PNG_sRGB_INTENT_RELATIVE 1 -#define PNG_sRGB_INTENT_SATURATION 2 -#define PNG_sRGB_INTENT_ABSOLUTE 3 -#define PNG_sRGB_INTENT_LAST 4 /* Not a valid value */ - -/* This is for text chunks */ -#define PNG_KEYWORD_MAX_LENGTH 79 - -/* Maximum number of entries in PLTE/sPLT/tRNS arrays */ -#define PNG_MAX_PALETTE_LENGTH 256 - -/* These determine if an ancillary chunk's data has been successfully read - * from the PNG header, or if the application has filled in the corresponding - * data in the info_struct to be written into the output file. The values - * of the PNG_INFO_ defines should NOT be changed. - */ -#define PNG_INFO_gAMA 0x0001 -#define PNG_INFO_sBIT 0x0002 -#define PNG_INFO_cHRM 0x0004 -#define PNG_INFO_PLTE 0x0008 -#define PNG_INFO_tRNS 0x0010 -#define PNG_INFO_bKGD 0x0020 -#define PNG_INFO_hIST 0x0040 -#define PNG_INFO_pHYs 0x0080 -#define PNG_INFO_oFFs 0x0100 -#define PNG_INFO_tIME 0x0200 -#define PNG_INFO_pCAL 0x0400 -#define PNG_INFO_sRGB 0x0800 /* GR-P, 0.96a */ -#define PNG_INFO_iCCP 0x1000 /* ESR, 1.0.6 */ -#define PNG_INFO_sPLT 0x2000 /* ESR, 1.0.6 */ -#define PNG_INFO_sCAL 0x4000 /* ESR, 1.0.6 */ -#define PNG_INFO_IDAT 0x8000 /* ESR, 1.0.6 */ - -/* This is used for the transformation routines, as some of them - * change these values for the row. It also should enable using - * the routines for other purposes. - */ -typedef struct png_row_info_struct -{ - png_uint_32 width; /* width of row */ - png_size_t rowbytes; /* number of bytes in row */ - png_byte color_type; /* color type of row */ - png_byte bit_depth; /* bit depth of row */ - png_byte channels; /* number of channels (1, 2, 3, or 4) */ - png_byte pixel_depth; /* bits per pixel (depth * channels) */ -} png_row_info; - -typedef png_row_info FAR * png_row_infop; -typedef png_row_info FAR * FAR * png_row_infopp; - -/* The complete definition of png_struct has, as of libpng-1.5.0, - * been moved into a separate header file that is not accessible to - * applications. Read libpng-manual.txt or libpng.3 for more info. - */ -typedef struct png_struct_def png_struct; -typedef PNG_CONST png_struct FAR * png_const_structp; -typedef png_struct FAR * png_structp; - -/* These are the function types for the I/O functions and for the functions - * that allow the user to override the default I/O functions with his or her - * own. The png_error_ptr type should match that of user-supplied warning - * and error functions, while the png_rw_ptr type should match that of the - * user read/write data functions. Note that the 'write' function must not - * modify the buffer it is passed. The 'read' function, on the other hand, is - * expected to return the read data in the buffer. - */ -typedef PNG_CALLBACK(void, *png_error_ptr, (png_structp, png_const_charp)); -typedef PNG_CALLBACK(void, *png_rw_ptr, (png_structp, png_bytep, png_size_t)); -typedef PNG_CALLBACK(void, *png_flush_ptr, (png_structp)); -typedef PNG_CALLBACK(void, *png_read_status_ptr, (png_structp, png_uint_32, - int)); -typedef PNG_CALLBACK(void, *png_write_status_ptr, (png_structp, png_uint_32, - int)); - -#ifdef PNG_PROGRESSIVE_READ_SUPPORTED -typedef PNG_CALLBACK(void, *png_progressive_info_ptr, (png_structp, png_infop)); -typedef PNG_CALLBACK(void, *png_progressive_end_ptr, (png_structp, png_infop)); - -/* The following callback receives png_uint_32 row_number, int pass for the - * png_bytep data of the row. When transforming an interlaced image the - * row number is the row number within the sub-image of the interlace pass, so - * the value will increase to the height of the sub-image (not the full image) - * then reset to 0 for the next pass. - * - * Use PNG_ROW_FROM_PASS_ROW(row, pass) and PNG_COL_FROM_PASS_COL(col, pass) to - * find the output pixel (x,y) given an interlaced sub-image pixel - * (row,col,pass). (See below for these macros.) - */ -typedef PNG_CALLBACK(void, *png_progressive_row_ptr, (png_structp, png_bytep, - png_uint_32, int)); -#endif - -#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \ - defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) -typedef PNG_CALLBACK(void, *png_user_transform_ptr, (png_structp, png_row_infop, - png_bytep)); -#endif - -#ifdef PNG_USER_CHUNKS_SUPPORTED -typedef PNG_CALLBACK(int, *png_user_chunk_ptr, (png_structp, - png_unknown_chunkp)); -#endif -#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED -typedef PNG_CALLBACK(void, *png_unknown_chunk_ptr, (png_structp)); -#endif - -#ifdef PNG_SETJMP_SUPPORTED -/* This must match the function definition in , and the application - * must include this before png.h to obtain the definition of jmp_buf. The - * function is required to be PNG_NORETURN, but this is not checked. If the - * function does return the application will crash via an abort() or similar - * system level call. - * - * If you get a warning here while building the library you may need to make - * changes to ensure that pnglibconf.h records the calling convention used by - * your compiler. This may be very difficult - try using a different compiler - * to build the library! - */ -PNG_FUNCTION(void, (PNGCAPI *png_longjmp_ptr), PNGARG((jmp_buf, int)), typedef); -#endif - -/* Transform masks for the high-level interface */ -#define PNG_TRANSFORM_IDENTITY 0x0000 /* read and write */ -#define PNG_TRANSFORM_STRIP_16 0x0001 /* read only */ -#define PNG_TRANSFORM_STRIP_ALPHA 0x0002 /* read only */ -#define PNG_TRANSFORM_PACKING 0x0004 /* read and write */ -#define PNG_TRANSFORM_PACKSWAP 0x0008 /* read and write */ -#define PNG_TRANSFORM_EXPAND 0x0010 /* read only */ -#define PNG_TRANSFORM_INVERT_MONO 0x0020 /* read and write */ -#define PNG_TRANSFORM_SHIFT 0x0040 /* read and write */ -#define PNG_TRANSFORM_BGR 0x0080 /* read and write */ -#define PNG_TRANSFORM_SWAP_ALPHA 0x0100 /* read and write */ -#define PNG_TRANSFORM_SWAP_ENDIAN 0x0200 /* read and write */ -#define PNG_TRANSFORM_INVERT_ALPHA 0x0400 /* read and write */ -#define PNG_TRANSFORM_STRIP_FILLER 0x0800 /* write only */ -/* Added to libpng-1.2.34 */ -#define PNG_TRANSFORM_STRIP_FILLER_BEFORE PNG_TRANSFORM_STRIP_FILLER -#define PNG_TRANSFORM_STRIP_FILLER_AFTER 0x1000 /* write only */ -/* Added to libpng-1.4.0 */ -#define PNG_TRANSFORM_GRAY_TO_RGB 0x2000 /* read only */ -/* Added to libpng-1.5.4 */ -#define PNG_TRANSFORM_EXPAND_16 0x4000 /* read only */ -#define PNG_TRANSFORM_SCALE_16 0x8000 /* read only */ - -/* Flags for MNG supported features */ -#define PNG_FLAG_MNG_EMPTY_PLTE 0x01 -#define PNG_FLAG_MNG_FILTER_64 0x04 -#define PNG_ALL_MNG_FEATURES 0x05 - -/* NOTE: prior to 1.5 these functions had no 'API' style declaration, - * this allowed the zlib default functions to be used on Windows - * platforms. In 1.5 the zlib default malloc (which just calls malloc and - * ignores the first argument) should be completely compatible with the - * following. - */ -typedef PNG_CALLBACK(png_voidp, *png_malloc_ptr, (png_structp, - png_alloc_size_t)); -typedef PNG_CALLBACK(void, *png_free_ptr, (png_structp, png_voidp)); - -typedef png_struct FAR * FAR * png_structpp; - -/* Section 3: exported functions - * Here are the function definitions most commonly used. This is not - * the place to find out how to use libpng. See libpng-manual.txt for the - * full explanation, see example.c for the summary. This just provides - * a simple one line description of the use of each function. - * - * The PNG_EXPORT() and PNG_EXPORTA() macros used below are defined in - * pngconf.h and in the *.dfn files in the scripts directory. - * - * PNG_EXPORT(ordinal, type, name, (args)); - * - * ordinal: ordinal that is used while building - * *.def files. The ordinal value is only - * relevant when preprocessing png.h with - * the *.dfn files for building symbol table - * entries, and are removed by pngconf.h. - * type: return type of the function - * name: function name - * args: function arguments, with types - * - * When we wish to append attributes to a function prototype we use - * the PNG_EXPORTA() macro instead. - * - * PNG_EXPORTA(ordinal, type, name, (args), attributes); - * - * ordinal, type, name, and args: same as in PNG_EXPORT(). - * attributes: function attributes - */ - -/* Returns the version number of the library */ -PNG_EXPORT(1, png_uint_32, png_access_version_number, (void)); - -/* Tell lib we have already handled the first magic bytes. - * Handling more than 8 bytes from the beginning of the file is an error. - */ -PNG_EXPORT(2, void, png_set_sig_bytes, (png_structp png_ptr, int num_bytes)); - -/* Check sig[start] through sig[start + num_to_check - 1] to see if it's a - * PNG file. Returns zero if the supplied bytes match the 8-byte PNG - * signature, and non-zero otherwise. Having num_to_check == 0 or - * start > 7 will always fail (ie return non-zero). - */ -PNG_EXPORT(3, int, png_sig_cmp, (png_const_bytep sig, png_size_t start, - png_size_t num_to_check)); - -/* Simple signature checking function. This is the same as calling - * png_check_sig(sig, n) := !png_sig_cmp(sig, 0, n). - */ -#define png_check_sig(sig, n) !png_sig_cmp((sig), 0, (n)) - -/* Allocate and initialize png_ptr struct for reading, and any other memory. */ -PNG_EXPORTA(4, png_structp, png_create_read_struct, - (png_const_charp user_png_ver, png_voidp error_ptr, - png_error_ptr error_fn, png_error_ptr warn_fn), - PNG_ALLOCATED); - -/* Allocate and initialize png_ptr struct for writing, and any other memory */ -PNG_EXPORTA(5, png_structp, png_create_write_struct, - (png_const_charp user_png_ver, png_voidp error_ptr, png_error_ptr error_fn, - png_error_ptr warn_fn), - PNG_ALLOCATED); - -PNG_EXPORT(6, png_size_t, png_get_compression_buffer_size, - (png_const_structp png_ptr)); - -PNG_EXPORT(7, void, png_set_compression_buffer_size, (png_structp png_ptr, - png_size_t size)); - -/* Moved from pngconf.h in 1.4.0 and modified to ensure setjmp/longjmp - * match up. - */ -#ifdef PNG_SETJMP_SUPPORTED -/* This function returns the jmp_buf built in to *png_ptr. It must be - * supplied with an appropriate 'longjmp' function to use on that jmp_buf - * unless the default error function is overridden in which case NULL is - * acceptable. The size of the jmp_buf is checked against the actual size - * allocated by the library - the call will return NULL on a mismatch - * indicating an ABI mismatch. - */ -PNG_EXPORT(8, jmp_buf*, png_set_longjmp_fn, (png_structp png_ptr, - png_longjmp_ptr longjmp_fn, size_t jmp_buf_size)); -# define png_jmpbuf(png_ptr) \ - (*png_set_longjmp_fn((png_ptr), longjmp, sizeof (jmp_buf))) -#else -# define png_jmpbuf(png_ptr) \ - (LIBPNG_WAS_COMPILED_WITH__PNG_NO_SETJMP) -#endif -/* This function should be used by libpng applications in place of - * longjmp(png_ptr->jmpbuf, val). If longjmp_fn() has been set, it - * will use it; otherwise it will call PNG_ABORT(). This function was - * added in libpng-1.5.0. - */ -PNG_EXPORTA(9, void, png_longjmp, (png_structp png_ptr, int val), - PNG_NORETURN); - -#ifdef PNG_READ_SUPPORTED -/* Reset the compression stream */ -PNG_EXPORT(10, int, png_reset_zstream, (png_structp png_ptr)); -#endif - -/* New functions added in libpng-1.0.2 (not enabled by default until 1.2.0) */ -#ifdef PNG_USER_MEM_SUPPORTED -PNG_EXPORTA(11, png_structp, png_create_read_struct_2, - (png_const_charp user_png_ver, png_voidp error_ptr, png_error_ptr error_fn, - png_error_ptr warn_fn, - png_voidp mem_ptr, png_malloc_ptr malloc_fn, png_free_ptr free_fn), - PNG_ALLOCATED); -PNG_EXPORTA(12, png_structp, png_create_write_struct_2, - (png_const_charp user_png_ver, png_voidp error_ptr, png_error_ptr error_fn, - png_error_ptr warn_fn, - png_voidp mem_ptr, png_malloc_ptr malloc_fn, png_free_ptr free_fn), - PNG_ALLOCATED); -#endif - -/* Write the PNG file signature. */ -PNG_EXPORT(13, void, png_write_sig, (png_structp png_ptr)); - -/* Write a PNG chunk - size, type, (optional) data, CRC. */ -PNG_EXPORT(14, void, png_write_chunk, (png_structp png_ptr, png_const_bytep - chunk_name, png_const_bytep data, png_size_t length)); - -/* Write the start of a PNG chunk - length and chunk name. */ -PNG_EXPORT(15, void, png_write_chunk_start, (png_structp png_ptr, - png_const_bytep chunk_name, png_uint_32 length)); - -/* Write the data of a PNG chunk started with png_write_chunk_start(). */ -PNG_EXPORT(16, void, png_write_chunk_data, (png_structp png_ptr, - png_const_bytep data, png_size_t length)); - -/* Finish a chunk started with png_write_chunk_start() (includes CRC). */ -PNG_EXPORT(17, void, png_write_chunk_end, (png_structp png_ptr)); - -/* Allocate and initialize the info structure */ -PNG_EXPORTA(18, png_infop, png_create_info_struct, (png_structp png_ptr), - PNG_ALLOCATED); - -PNG_EXPORT(19, void, png_info_init_3, (png_infopp info_ptr, - png_size_t png_info_struct_size)); - -/* Writes all the PNG information before the image. */ -PNG_EXPORT(20, void, png_write_info_before_PLTE, - (png_structp png_ptr, png_infop info_ptr)); -PNG_EXPORT(21, void, png_write_info, - (png_structp png_ptr, png_infop info_ptr)); - -#ifdef PNG_SEQUENTIAL_READ_SUPPORTED -/* Read the information before the actual image data. */ -PNG_EXPORT(22, void, png_read_info, - (png_structp png_ptr, png_infop info_ptr)); -#endif - -#ifdef PNG_TIME_RFC1123_SUPPORTED -PNG_EXPORT(23, png_const_charp, png_convert_to_rfc1123, - (png_structp png_ptr, - png_const_timep ptime)); -#endif - -#ifdef PNG_CONVERT_tIME_SUPPORTED -/* Convert from a struct tm to png_time */ -PNG_EXPORT(24, void, png_convert_from_struct_tm, (png_timep ptime, - PNG_CONST struct tm FAR * ttime)); - -/* Convert from time_t to png_time. Uses gmtime() */ -PNG_EXPORT(25, void, png_convert_from_time_t, - (png_timep ptime, time_t ttime)); -#endif /* PNG_CONVERT_tIME_SUPPORTED */ - -#ifdef PNG_READ_EXPAND_SUPPORTED -/* Expand data to 24-bit RGB, or 8-bit grayscale, with alpha if available. */ -PNG_EXPORT(26, void, png_set_expand, (png_structp png_ptr)); -PNG_EXPORT(27, void, png_set_expand_gray_1_2_4_to_8, (png_structp png_ptr)); -PNG_EXPORT(28, void, png_set_palette_to_rgb, (png_structp png_ptr)); -PNG_EXPORT(29, void, png_set_tRNS_to_alpha, (png_structp png_ptr)); -#endif - -#ifdef PNG_READ_EXPAND_16_SUPPORTED -/* Expand to 16-bit channels, forces conversion of palette to RGB and expansion - * of a tRNS chunk if present. - */ -PNG_EXPORT(221, void, png_set_expand_16, (png_structp png_ptr)); -#endif - -#if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED) -/* Use blue, green, red order for pixels. */ -PNG_EXPORT(30, void, png_set_bgr, (png_structp png_ptr)); -#endif - -#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED -/* Expand the grayscale to 24-bit RGB if necessary. */ -PNG_EXPORT(31, void, png_set_gray_to_rgb, (png_structp png_ptr)); -#endif - -#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED -/* Reduce RGB to grayscale. */ -#define PNG_ERROR_ACTION_NONE 1 -#define PNG_ERROR_ACTION_WARN 2 -#define PNG_ERROR_ACTION_ERROR 3 -#define PNG_RGB_TO_GRAY_DEFAULT (-1)/*for red/green coefficients*/ - -PNG_FP_EXPORT(32, void, png_set_rgb_to_gray, (png_structp png_ptr, - int error_action, double red, double green)); -PNG_FIXED_EXPORT(33, void, png_set_rgb_to_gray_fixed, (png_structp png_ptr, - int error_action, png_fixed_point red, png_fixed_point green)); - -PNG_EXPORT(34, png_byte, png_get_rgb_to_gray_status, (png_const_structp - png_ptr)); -#endif - -#ifdef PNG_BUILD_GRAYSCALE_PALETTE_SUPPORTED -PNG_EXPORT(35, void, png_build_grayscale_palette, (int bit_depth, - png_colorp palette)); -#endif - -#ifdef PNG_READ_ALPHA_MODE_SUPPORTED -/* How the alpha channel is interpreted - this affects how the color channels of - * a PNG file are returned when an alpha channel, or tRNS chunk in a palette - * file, is present. - * - * This has no effect on the way pixels are written into a PNG output - * datastream. The color samples in a PNG datastream are never premultiplied - * with the alpha samples. - * - * The default is to return data according to the PNG specification: the alpha - * channel is a linear measure of the contribution of the pixel to the - * corresponding composited pixel. The gamma encoded color channels must be - * scaled according to the contribution and to do this it is necessary to undo - * the encoding, scale the color values, perform the composition and reencode - * the values. This is the 'PNG' mode. - * - * The alternative is to 'associate' the alpha with the color information by - * storing color channel values that have been scaled by the alpha. The - * advantage is that the color channels can be resampled (the image can be - * scaled) in this form. The disadvantage is that normal practice is to store - * linear, not (gamma) encoded, values and this requires 16-bit channels for - * still images rather than the 8-bit channels that are just about sufficient if - * gamma encoding is used. In addition all non-transparent pixel values, - * including completely opaque ones, must be gamma encoded to produce the final - * image. This is the 'STANDARD', 'ASSOCIATED' or 'PREMULTIPLIED' mode (the - * latter being the two common names for associated alpha color channels.) - * - * Since it is not necessary to perform arithmetic on opaque color values so - * long as they are not to be resampled and are in the final color space it is - * possible to optimize the handling of alpha by storing the opaque pixels in - * the PNG format (adjusted for the output color space) while storing partially - * opaque pixels in the standard, linear, format. The accuracy required for - * standard alpha composition is relatively low, because the pixels are - * isolated, therefore typically the accuracy loss in storing 8-bit linear - * values is acceptable. (This is not true if the alpha channel is used to - * simulate transparency over large areas - use 16 bits or the PNG mode in - * this case!) This is the 'OPTIMIZED' mode. For this mode a pixel is - * treated as opaque only if the alpha value is equal to the maximum value. - * - * The final choice is to gamma encode the alpha channel as well. This is - * broken because, in practice, no implementation that uses this choice - * correctly undoes the encoding before handling alpha composition. Use this - * choice only if other serious errors in the software or hardware you use - * mandate it; the typical serious error is for dark halos to appear around - * opaque areas of the composited PNG image because of arithmetic overflow. - * - * The API function png_set_alpha_mode specifies which of these choices to use - * with an enumerated 'mode' value and the gamma of the required output: - */ -#define PNG_ALPHA_PNG 0 /* according to the PNG standard */ -#define PNG_ALPHA_STANDARD 1 /* according to Porter/Duff */ -#define PNG_ALPHA_ASSOCIATED 1 /* as above; this is the normal practice */ -#define PNG_ALPHA_PREMULTIPLIED 1 /* as above */ -#define PNG_ALPHA_OPTIMIZED 2 /* 'PNG' for opaque pixels, else 'STANDARD' */ -#define PNG_ALPHA_BROKEN 3 /* the alpha channel is gamma encoded */ - -PNG_FP_EXPORT(227, void, png_set_alpha_mode, (png_structp png_ptr, int mode, - double output_gamma)); -PNG_FIXED_EXPORT(228, void, png_set_alpha_mode_fixed, (png_structp png_ptr, - int mode, png_fixed_point output_gamma)); -#endif - -#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_ALPHA_MODE_SUPPORTED) -/* The output_gamma value is a screen gamma in libpng terminology: it expresses - * how to decode the output values, not how they are encoded. The values used - * correspond to the normal numbers used to describe the overall gamma of a - * computer display system; for example 2.2 for an sRGB conformant system. The - * values are scaled by 100000 in the _fixed version of the API (so 220000 for - * sRGB.) - * - * The inverse of the value is always used to provide a default for the PNG file - * encoding if it has no gAMA chunk and if png_set_gamma() has not been called - * to override the PNG gamma information. - * - * When the ALPHA_OPTIMIZED mode is selected the output gamma is used to encode - * opaque pixels however pixels with lower alpha values are not encoded, - * regardless of the output gamma setting. - * - * When the standard Porter Duff handling is requested with mode 1 the output - * encoding is set to be linear and the output_gamma value is only relevant - * as a default for input data that has no gamma information. The linear output - * encoding will be overridden if png_set_gamma() is called - the results may be - * highly unexpected! - * - * The following numbers are derived from the sRGB standard and the research - * behind it. sRGB is defined to be approximated by a PNG gAMA chunk value of - * 0.45455 (1/2.2) for PNG. The value implicitly includes any viewing - * correction required to take account of any differences in the color - * environment of the original scene and the intended display environment; the - * value expresses how to *decode* the image for display, not how the original - * data was *encoded*. - * - * sRGB provides a peg for the PNG standard by defining a viewing environment. - * sRGB itself, and earlier TV standards, actually use a more complex transform - * (a linear portion then a gamma 2.4 power law) than PNG can express. (PNG is - * limited to simple power laws.) By saying that an image for direct display on - * an sRGB conformant system should be stored with a gAMA chunk value of 45455 - * (11.3.3.2 and 11.3.3.5 of the ISO PNG specification) the PNG specification - * makes it possible to derive values for other display systems and - * environments. - * - * The Mac value is deduced from the sRGB based on an assumption that the actual - * extra viewing correction used in early Mac display systems was implemented as - * a power 1.45 lookup table. - * - * Any system where a programmable lookup table is used or where the behavior of - * the final display device characteristics can be changed requires system - * specific code to obtain the current characteristic. However this can be - * difficult and most PNG gamma correction only requires an approximate value. - * - * By default, if png_set_alpha_mode() is not called, libpng assumes that all - * values are unencoded, linear, values and that the output device also has a - * linear characteristic. This is only very rarely correct - it is invariably - * better to call png_set_alpha_mode() with PNG_DEFAULT_sRGB than rely on the - * default if you don't know what the right answer is! - * - * The special value PNG_GAMMA_MAC_18 indicates an older Mac system (pre Mac OS - * 10.6) which used a correction table to implement a somewhat lower gamma on an - * otherwise sRGB system. - * - * Both these values are reserved (not simple gamma values) in order to allow - * more precise correction internally in the future. - * - * NOTE: the following values can be passed to either the fixed or floating - * point APIs, but the floating point API will also accept floating point - * values. - */ -#define PNG_DEFAULT_sRGB -1 /* sRGB gamma and color space */ -#define PNG_GAMMA_MAC_18 -2 /* Old Mac '1.8' gamma and color space */ -#define PNG_GAMMA_sRGB 220000 /* Television standards--matches sRGB gamma */ -#define PNG_GAMMA_LINEAR PNG_FP_1 /* Linear */ -#endif - -/* The following are examples of calls to png_set_alpha_mode to achieve the - * required overall gamma correction and, where necessary, alpha - * premultiplication. - * - * png_set_alpha_mode(pp, PNG_ALPHA_PNG, PNG_DEFAULT_sRGB); - * This is the default libpng handling of the alpha channel - it is not - * pre-multiplied into the color components. In addition the call states - * that the output is for a sRGB system and causes all PNG files without gAMA - * chunks to be assumed to be encoded using sRGB. - * - * png_set_alpha_mode(pp, PNG_ALPHA_PNG, PNG_GAMMA_MAC); - * In this case the output is assumed to be something like an sRGB conformant - * display preceeded by a power-law lookup table of power 1.45. This is how - * early Mac systems behaved. - * - * png_set_alpha_mode(pp, PNG_ALPHA_STANDARD, PNG_GAMMA_LINEAR); - * This is the classic Jim Blinn approach and will work in academic - * environments where everything is done by the book. It has the shortcoming - * of assuming that input PNG data with no gamma information is linear - this - * is unlikely to be correct unless the PNG files where generated locally. - * Most of the time the output precision will be so low as to show - * significant banding in dark areas of the image. - * - * png_set_expand_16(pp); - * png_set_alpha_mode(pp, PNG_ALPHA_STANDARD, PNG_DEFAULT_sRGB); - * This is a somewhat more realistic Jim Blinn inspired approach. PNG files - * are assumed to have the sRGB encoding if not marked with a gamma value and - * the output is always 16 bits per component. This permits accurate scaling - * and processing of the data. If you know that your input PNG files were - * generated locally you might need to replace PNG_DEFAULT_sRGB with the - * correct value for your system. - * - * png_set_alpha_mode(pp, PNG_ALPHA_OPTIMIZED, PNG_DEFAULT_sRGB); - * If you just need to composite the PNG image onto an existing background - * and if you control the code that does this you can use the optimization - * setting. In this case you just copy completely opaque pixels to the - * output. For pixels that are not completely transparent (you just skip - * those) you do the composition math using png_composite or png_composite_16 - * below then encode the resultant 8-bit or 16-bit values to match the output - * encoding. - * - * Other cases - * If neither the PNG nor the standard linear encoding work for you because - * of the software or hardware you use then you have a big problem. The PNG - * case will probably result in halos around the image. The linear encoding - * will probably result in a washed out, too bright, image (it's actually too - * contrasty.) Try the ALPHA_OPTIMIZED mode above - this will probably - * substantially reduce the halos. Alternatively try: - * - * png_set_alpha_mode(pp, PNG_ALPHA_BROKEN, PNG_DEFAULT_sRGB); - * This option will also reduce the halos, but there will be slight dark - * halos round the opaque parts of the image where the background is light. - * In the OPTIMIZED mode the halos will be light halos where the background - * is dark. Take your pick - the halos are unavoidable unless you can get - * your hardware/software fixed! (The OPTIMIZED approach is slightly - * faster.) - * - * When the default gamma of PNG files doesn't match the output gamma. - * If you have PNG files with no gamma information png_set_alpha_mode allows - * you to provide a default gamma, but it also sets the ouput gamma to the - * matching value. If you know your PNG files have a gamma that doesn't - * match the output you can take advantage of the fact that - * png_set_alpha_mode always sets the output gamma but only sets the PNG - * default if it is not already set: - * - * png_set_alpha_mode(pp, PNG_ALPHA_PNG, PNG_DEFAULT_sRGB); - * png_set_alpha_mode(pp, PNG_ALPHA_PNG, PNG_GAMMA_MAC); - * The first call sets both the default and the output gamma values, the - * second call overrides the output gamma without changing the default. This - * is easier than achieving the same effect with png_set_gamma. You must use - * PNG_ALPHA_PNG for the first call - internal checking in png_set_alpha will - * fire if more than one call to png_set_alpha_mode and png_set_background is - * made in the same read operation, however multiple calls with PNG_ALPHA_PNG - * are ignored. - */ - -#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED -PNG_EXPORT(36, void, png_set_strip_alpha, (png_structp png_ptr)); -#endif - -#if defined(PNG_READ_SWAP_ALPHA_SUPPORTED) || \ - defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED) -PNG_EXPORT(37, void, png_set_swap_alpha, (png_structp png_ptr)); -#endif - -#if defined(PNG_READ_INVERT_ALPHA_SUPPORTED) || \ - defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED) -PNG_EXPORT(38, void, png_set_invert_alpha, (png_structp png_ptr)); -#endif - -#if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED) -/* Add a filler byte to 8-bit Gray or 24-bit RGB images. */ -PNG_EXPORT(39, void, png_set_filler, (png_structp png_ptr, png_uint_32 filler, - int flags)); -/* The values of the PNG_FILLER_ defines should NOT be changed */ -# define PNG_FILLER_BEFORE 0 -# define PNG_FILLER_AFTER 1 -/* Add an alpha byte to 8-bit Gray or 24-bit RGB images. */ -PNG_EXPORT(40, void, png_set_add_alpha, - (png_structp png_ptr, png_uint_32 filler, - int flags)); -#endif /* PNG_READ_FILLER_SUPPORTED || PNG_WRITE_FILLER_SUPPORTED */ - -#if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED) -/* Swap bytes in 16-bit depth files. */ -PNG_EXPORT(41, void, png_set_swap, (png_structp png_ptr)); -#endif - -#if defined(PNG_READ_PACK_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED) -/* Use 1 byte per pixel in 1, 2, or 4-bit depth files. */ -PNG_EXPORT(42, void, png_set_packing, (png_structp png_ptr)); -#endif - -#if defined(PNG_READ_PACKSWAP_SUPPORTED) || \ - defined(PNG_WRITE_PACKSWAP_SUPPORTED) -/* Swap packing order of pixels in bytes. */ -PNG_EXPORT(43, void, png_set_packswap, (png_structp png_ptr)); -#endif - -#if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED) -/* Converts files to legal bit depths. */ -PNG_EXPORT(44, void, png_set_shift, (png_structp png_ptr, png_const_color_8p - true_bits)); -#endif - -#if defined(PNG_READ_INTERLACING_SUPPORTED) || \ - defined(PNG_WRITE_INTERLACING_SUPPORTED) -/* Have the code handle the interlacing. Returns the number of passes. - * MUST be called before png_read_update_info or png_start_read_image, - * otherwise it will not have the desired effect. Note that it is still - * necessary to call png_read_row or png_read_rows png_get_image_height - * times for each pass. -*/ -PNG_EXPORT(45, int, png_set_interlace_handling, (png_structp png_ptr)); -#endif - -#if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED) -/* Invert monochrome files */ -PNG_EXPORT(46, void, png_set_invert_mono, (png_structp png_ptr)); -#endif - -#ifdef PNG_READ_BACKGROUND_SUPPORTED -/* Handle alpha and tRNS by replacing with a background color. Prior to - * libpng-1.5.4 this API must not be called before the PNG file header has been - * read. Doing so will result in unexpected behavior and possible warnings or - * errors if the PNG file contains a bKGD chunk. - */ -PNG_FP_EXPORT(47, void, png_set_background, (png_structp png_ptr, - png_const_color_16p background_color, int background_gamma_code, - int need_expand, double background_gamma)); -PNG_FIXED_EXPORT(215, void, png_set_background_fixed, (png_structp png_ptr, - png_const_color_16p background_color, int background_gamma_code, - int need_expand, png_fixed_point background_gamma)); -#endif -#ifdef PNG_READ_BACKGROUND_SUPPORTED -# define PNG_BACKGROUND_GAMMA_UNKNOWN 0 -# define PNG_BACKGROUND_GAMMA_SCREEN 1 -# define PNG_BACKGROUND_GAMMA_FILE 2 -# define PNG_BACKGROUND_GAMMA_UNIQUE 3 -#endif - -#ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED -/* Scale a 16-bit depth file down to 8-bit, accurately. */ -PNG_EXPORT(229, void, png_set_scale_16, (png_structp png_ptr)); -#endif - -#ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED -#define PNG_READ_16_TO_8 SUPPORTED /* Name prior to 1.5.4 */ -/* Strip the second byte of information from a 16-bit depth file. */ -PNG_EXPORT(48, void, png_set_strip_16, (png_structp png_ptr)); -#endif - -#ifdef PNG_READ_QUANTIZE_SUPPORTED -/* Turn on quantizing, and reduce the palette to the number of colors - * available. - */ -PNG_EXPORT(49, void, png_set_quantize, - (png_structp png_ptr, png_colorp palette, - int num_palette, int maximum_colors, png_const_uint_16p histogram, - int full_quantize)); -#endif - -#ifdef PNG_READ_GAMMA_SUPPORTED -/* The threshold on gamma processing is configurable but hard-wired into the - * library. The following is the floating point variant. - */ -#define PNG_GAMMA_THRESHOLD (PNG_GAMMA_THRESHOLD_FIXED*.00001) - -/* Handle gamma correction. Screen_gamma=(display_exponent). - * NOTE: this API simply sets the screen and file gamma values. It will - * therefore override the value for gamma in a PNG file if it is called after - * the file header has been read - use with care - call before reading the PNG - * file for best results! - * - * These routines accept the same gamma values as png_set_alpha_mode (described - * above). The PNG_GAMMA_ defines and PNG_DEFAULT_sRGB can be passed to either - * API (floating point or fixed.) Notice, however, that the 'file_gamma' value - * is the inverse of a 'screen gamma' value. - */ -PNG_FP_EXPORT(50, void, png_set_gamma, - (png_structp png_ptr, double screen_gamma, - double override_file_gamma)); -PNG_FIXED_EXPORT(208, void, png_set_gamma_fixed, (png_structp png_ptr, - png_fixed_point screen_gamma, png_fixed_point override_file_gamma)); -#endif - -#ifdef PNG_WRITE_FLUSH_SUPPORTED -/* Set how many lines between output flushes - 0 for no flushing */ -PNG_EXPORT(51, void, png_set_flush, (png_structp png_ptr, int nrows)); -/* Flush the current PNG output buffer */ -PNG_EXPORT(52, void, png_write_flush, (png_structp png_ptr)); -#endif - -/* Optional update palette with requested transformations */ -PNG_EXPORT(53, void, png_start_read_image, (png_structp png_ptr)); - -/* Optional call to update the users info structure */ -PNG_EXPORT(54, void, png_read_update_info, - (png_structp png_ptr, png_infop info_ptr)); - -#ifdef PNG_SEQUENTIAL_READ_SUPPORTED -/* Read one or more rows of image data. */ -PNG_EXPORT(55, void, png_read_rows, (png_structp png_ptr, png_bytepp row, - png_bytepp display_row, png_uint_32 num_rows)); -#endif - -#ifdef PNG_SEQUENTIAL_READ_SUPPORTED -/* Read a row of data. */ -PNG_EXPORT(56, void, png_read_row, (png_structp png_ptr, png_bytep row, - png_bytep display_row)); -#endif - -#ifdef PNG_SEQUENTIAL_READ_SUPPORTED -/* Read the whole image into memory at once. */ -PNG_EXPORT(57, void, png_read_image, (png_structp png_ptr, png_bytepp image)); -#endif - -/* Write a row of image data */ -PNG_EXPORT(58, void, png_write_row, - (png_structp png_ptr, png_const_bytep row)); - -/* Write a few rows of image data: (*row) is not written; however, the type - * is declared as writeable to maintain compatibility with previous versions - * of libpng and to allow the 'display_row' array from read_rows to be passed - * unchanged to write_rows. - */ -PNG_EXPORT(59, void, png_write_rows, (png_structp png_ptr, png_bytepp row, - png_uint_32 num_rows)); - -/* Write the image data */ -PNG_EXPORT(60, void, png_write_image, - (png_structp png_ptr, png_bytepp image)); - -/* Write the end of the PNG file. */ -PNG_EXPORT(61, void, png_write_end, - (png_structp png_ptr, png_infop info_ptr)); - -#ifdef PNG_SEQUENTIAL_READ_SUPPORTED -/* Read the end of the PNG file. */ -PNG_EXPORT(62, void, png_read_end, (png_structp png_ptr, png_infop info_ptr)); -#endif - -/* Free any memory associated with the png_info_struct */ -PNG_EXPORT(63, void, png_destroy_info_struct, (png_structp png_ptr, - png_infopp info_ptr_ptr)); - -/* Free any memory associated with the png_struct and the png_info_structs */ -PNG_EXPORT(64, void, png_destroy_read_struct, (png_structpp png_ptr_ptr, - png_infopp info_ptr_ptr, png_infopp end_info_ptr_ptr)); - -/* Free any memory associated with the png_struct and the png_info_structs */ -PNG_EXPORT(65, void, png_destroy_write_struct, (png_structpp png_ptr_ptr, - png_infopp info_ptr_ptr)); - -/* Set the libpng method of handling chunk CRC errors */ -PNG_EXPORT(66, void, png_set_crc_action, - (png_structp png_ptr, int crit_action, int ancil_action)); - -/* Values for png_set_crc_action() say how to handle CRC errors in - * ancillary and critical chunks, and whether to use the data contained - * therein. Note that it is impossible to "discard" data in a critical - * chunk. For versions prior to 0.90, the action was always error/quit, - * whereas in version 0.90 and later, the action for CRC errors in ancillary - * chunks is warn/discard. These values should NOT be changed. - * - * value action:critical action:ancillary - */ -#define PNG_CRC_DEFAULT 0 /* error/quit warn/discard data */ -#define PNG_CRC_ERROR_QUIT 1 /* error/quit error/quit */ -#define PNG_CRC_WARN_DISCARD 2 /* (INVALID) warn/discard data */ -#define PNG_CRC_WARN_USE 3 /* warn/use data warn/use data */ -#define PNG_CRC_QUIET_USE 4 /* quiet/use data quiet/use data */ -#define PNG_CRC_NO_CHANGE 5 /* use current value use current value */ - -/* These functions give the user control over the scan-line filtering in - * libpng and the compression methods used by zlib. These functions are - * mainly useful for testing, as the defaults should work with most users. - * Those users who are tight on memory or want faster performance at the - * expense of compression can modify them. See the compression library - * header file (zlib.h) for an explination of the compression functions. - */ - -/* Set the filtering method(s) used by libpng. Currently, the only valid - * value for "method" is 0. - */ -PNG_EXPORT(67, void, png_set_filter, - (png_structp png_ptr, int method, int filters)); - -/* Flags for png_set_filter() to say which filters to use. The flags - * are chosen so that they don't conflict with real filter types - * below, in case they are supplied instead of the #defined constants. - * These values should NOT be changed. - */ -#define PNG_NO_FILTERS 0x00 -#define PNG_FILTER_NONE 0x08 -#define PNG_FILTER_SUB 0x10 -#define PNG_FILTER_UP 0x20 -#define PNG_FILTER_AVG 0x40 -#define PNG_FILTER_PAETH 0x80 -#define PNG_ALL_FILTERS (PNG_FILTER_NONE | PNG_FILTER_SUB | PNG_FILTER_UP | \ - PNG_FILTER_AVG | PNG_FILTER_PAETH) - -/* Filter values (not flags) - used in pngwrite.c, pngwutil.c for now. - * These defines should NOT be changed. - */ -#define PNG_FILTER_VALUE_NONE 0 -#define PNG_FILTER_VALUE_SUB 1 -#define PNG_FILTER_VALUE_UP 2 -#define PNG_FILTER_VALUE_AVG 3 -#define PNG_FILTER_VALUE_PAETH 4 -#define PNG_FILTER_VALUE_LAST 5 - -#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED /* EXPERIMENTAL */ -/* The "heuristic_method" is given by one of the PNG_FILTER_HEURISTIC_ - * defines, either the default (minimum-sum-of-absolute-differences), or - * the experimental method (weighted-minimum-sum-of-absolute-differences). - * - * Weights are factors >= 1.0, indicating how important it is to keep the - * filter type consistent between rows. Larger numbers mean the current - * filter is that many times as likely to be the same as the "num_weights" - * previous filters. This is cumulative for each previous row with a weight. - * There needs to be "num_weights" values in "filter_weights", or it can be - * NULL if the weights aren't being specified. Weights have no influence on - * the selection of the first row filter. Well chosen weights can (in theory) - * improve the compression for a given image. - * - * Costs are factors >= 1.0 indicating the relative decoding costs of a - * filter type. Higher costs indicate more decoding expense, and are - * therefore less likely to be selected over a filter with lower computational - * costs. There needs to be a value in "filter_costs" for each valid filter - * type (given by PNG_FILTER_VALUE_LAST), or it can be NULL if you aren't - * setting the costs. Costs try to improve the speed of decompression without - * unduly increasing the compressed image size. - * - * A negative weight or cost indicates the default value is to be used, and - * values in the range [0.0, 1.0) indicate the value is to remain unchanged. - * The default values for both weights and costs are currently 1.0, but may - * change if good general weighting/cost heuristics can be found. If both - * the weights and costs are set to 1.0, this degenerates the WEIGHTED method - * to the UNWEIGHTED method, but with added encoding time/computation. - */ -PNG_FP_EXPORT(68, void, png_set_filter_heuristics, (png_structp png_ptr, - int heuristic_method, int num_weights, png_const_doublep filter_weights, - png_const_doublep filter_costs)); -PNG_FIXED_EXPORT(209, void, png_set_filter_heuristics_fixed, - (png_structp png_ptr, - int heuristic_method, int num_weights, png_const_fixed_point_p - filter_weights, png_const_fixed_point_p filter_costs)); -#endif /* PNG_WRITE_WEIGHTED_FILTER_SUPPORTED */ - -/* Heuristic used for row filter selection. These defines should NOT be - * changed. - */ -#define PNG_FILTER_HEURISTIC_DEFAULT 0 /* Currently "UNWEIGHTED" */ -#define PNG_FILTER_HEURISTIC_UNWEIGHTED 1 /* Used by libpng < 0.95 */ -#define PNG_FILTER_HEURISTIC_WEIGHTED 2 /* Experimental feature */ -#define PNG_FILTER_HEURISTIC_LAST 3 /* Not a valid value */ - -#ifdef PNG_WRITE_SUPPORTED -/* Set the library compression level. Currently, valid values range from - * 0 - 9, corresponding directly to the zlib compression levels 0 - 9 - * (0 - no compression, 9 - "maximal" compression). Note that tests have - * shown that zlib compression levels 3-6 usually perform as well as level 9 - * for PNG images, and do considerably fewer caclulations. In the future, - * these values may not correspond directly to the zlib compression levels. - */ -PNG_EXPORT(69, void, png_set_compression_level, - (png_structp png_ptr, int level)); - -PNG_EXPORT(70, void, png_set_compression_mem_level, (png_structp png_ptr, - int mem_level)); - -PNG_EXPORT(71, void, png_set_compression_strategy, (png_structp png_ptr, - int strategy)); - -/* If PNG_WRITE_OPTIMIZE_CMF_SUPPORTED is defined, libpng will use a - * smaller value of window_bits if it can do so safely. - */ -PNG_EXPORT(72, void, png_set_compression_window_bits, (png_structp png_ptr, - int window_bits)); - -PNG_EXPORT(73, void, png_set_compression_method, (png_structp png_ptr, - int method)); -#endif - -#ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED -/* Also set zlib parameters for compressing non-IDAT chunks */ -PNG_EXPORT(222, void, png_set_text_compression_level, - (png_structp png_ptr, int level)); - -PNG_EXPORT(223, void, png_set_text_compression_mem_level, (png_structp png_ptr, - int mem_level)); - -PNG_EXPORT(224, void, png_set_text_compression_strategy, (png_structp png_ptr, - int strategy)); - -/* If PNG_WRITE_OPTIMIZE_CMF_SUPPORTED is defined, libpng will use a - * smaller value of window_bits if it can do so safely. - */ -PNG_EXPORT(225, void, png_set_text_compression_window_bits, (png_structp - png_ptr, int window_bits)); - -PNG_EXPORT(226, void, png_set_text_compression_method, (png_structp png_ptr, - int method)); -#endif /* PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED */ - -/* These next functions are called for input/output, memory, and error - * handling. They are in the file pngrio.c, pngwio.c, and pngerror.c, - * and call standard C I/O routines such as fread(), fwrite(), and - * fprintf(). These functions can be made to use other I/O routines - * at run time for those applications that need to handle I/O in a - * different manner by calling png_set_???_fn(). See libpng-manual.txt for - * more information. - */ - -#ifdef PNG_STDIO_SUPPORTED -/* Initialize the input/output for the PNG file to the default functions. */ -PNG_EXPORT(74, void, png_init_io, (png_structp png_ptr, png_FILE_p fp)); -#endif - -/* Replace the (error and abort), and warning functions with user - * supplied functions. If no messages are to be printed you must still - * write and use replacement functions. The replacement error_fn should - * still do a longjmp to the last setjmp location if you are using this - * method of error handling. If error_fn or warning_fn is NULL, the - * default function will be used. - */ - -PNG_EXPORT(75, void, png_set_error_fn, - (png_structp png_ptr, png_voidp error_ptr, - png_error_ptr error_fn, png_error_ptr warning_fn)); - -/* Return the user pointer associated with the error functions */ -PNG_EXPORT(76, png_voidp, png_get_error_ptr, (png_const_structp png_ptr)); - -/* Replace the default data output functions with a user supplied one(s). - * If buffered output is not used, then output_flush_fn can be set to NULL. - * If PNG_WRITE_FLUSH_SUPPORTED is not defined at libpng compile time - * output_flush_fn will be ignored (and thus can be NULL). - * It is probably a mistake to use NULL for output_flush_fn if - * write_data_fn is not also NULL unless you have built libpng with - * PNG_WRITE_FLUSH_SUPPORTED undefined, because in this case libpng's - * default flush function, which uses the standard *FILE structure, will - * be used. - */ -PNG_EXPORT(77, void, png_set_write_fn, (png_structp png_ptr, png_voidp io_ptr, - png_rw_ptr write_data_fn, png_flush_ptr output_flush_fn)); - -/* Replace the default data input function with a user supplied one. */ -PNG_EXPORT(78, void, png_set_read_fn, (png_structp png_ptr, png_voidp io_ptr, - png_rw_ptr read_data_fn)); - -/* Return the user pointer associated with the I/O functions */ -PNG_EXPORT(79, png_voidp, png_get_io_ptr, (png_structp png_ptr)); - -PNG_EXPORT(80, void, png_set_read_status_fn, (png_structp png_ptr, - png_read_status_ptr read_row_fn)); - -PNG_EXPORT(81, void, png_set_write_status_fn, (png_structp png_ptr, - png_write_status_ptr write_row_fn)); - -#ifdef PNG_USER_MEM_SUPPORTED -/* Replace the default memory allocation functions with user supplied one(s). */ -PNG_EXPORT(82, void, png_set_mem_fn, (png_structp png_ptr, png_voidp mem_ptr, - png_malloc_ptr malloc_fn, png_free_ptr free_fn)); -/* Return the user pointer associated with the memory functions */ -PNG_EXPORT(83, png_voidp, png_get_mem_ptr, (png_const_structp png_ptr)); -#endif - -#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED -PNG_EXPORT(84, void, png_set_read_user_transform_fn, (png_structp png_ptr, - png_user_transform_ptr read_user_transform_fn)); -#endif - -#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED -PNG_EXPORT(85, void, png_set_write_user_transform_fn, (png_structp png_ptr, - png_user_transform_ptr write_user_transform_fn)); -#endif - -#ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED -PNG_EXPORT(86, void, png_set_user_transform_info, (png_structp png_ptr, - png_voidp user_transform_ptr, int user_transform_depth, - int user_transform_channels)); -/* Return the user pointer associated with the user transform functions */ -PNG_EXPORT(87, png_voidp, png_get_user_transform_ptr, - (png_const_structp png_ptr)); -#endif - -#ifdef PNG_USER_TRANSFORM_INFO_SUPPORTED -/* Return information about the row currently being processed. Note that these - * APIs do not fail but will return unexpected results if called outside a user - * transform callback. Also note that when transforming an interlaced image the - * row number is the row number within the sub-image of the interlace pass, so - * the value will increase to the height of the sub-image (not the full image) - * then reset to 0 for the next pass. - * - * Use PNG_ROW_FROM_PASS_ROW(row, pass) and PNG_COL_FROM_PASS_COL(col, pass) to - * find the output pixel (x,y) given an interlaced sub-image pixel - * (row,col,pass). (See below for these macros.) - */ -PNG_EXPORT(217, png_uint_32, png_get_current_row_number, (png_const_structp)); -PNG_EXPORT(218, png_byte, png_get_current_pass_number, (png_const_structp)); -#endif - -#ifdef PNG_USER_CHUNKS_SUPPORTED -PNG_EXPORT(88, void, png_set_read_user_chunk_fn, (png_structp png_ptr, - png_voidp user_chunk_ptr, png_user_chunk_ptr read_user_chunk_fn)); -PNG_EXPORT(89, png_voidp, png_get_user_chunk_ptr, (png_const_structp png_ptr)); -#endif - -#ifdef PNG_PROGRESSIVE_READ_SUPPORTED -/* Sets the function callbacks for the push reader, and a pointer to a - * user-defined structure available to the callback functions. - */ -PNG_EXPORT(90, void, png_set_progressive_read_fn, (png_structp png_ptr, - png_voidp progressive_ptr, png_progressive_info_ptr info_fn, - png_progressive_row_ptr row_fn, png_progressive_end_ptr end_fn)); - -/* Returns the user pointer associated with the push read functions */ -PNG_EXPORT(91, png_voidp, png_get_progressive_ptr, (png_const_structp png_ptr)); - -/* Function to be called when data becomes available */ -PNG_EXPORT(92, void, png_process_data, - (png_structp png_ptr, png_infop info_ptr, - png_bytep buffer, png_size_t buffer_size)); - -/* A function which may be called *only* within png_process_data to stop the - * processing of any more data. The function returns the number of bytes - * remaining, excluding any that libpng has cached internally. A subsequent - * call to png_process_data must supply these bytes again. If the argument - * 'save' is set to true the routine will first save all the pending data and - * will always return 0. - */ -PNG_EXPORT(219, png_size_t, png_process_data_pause, (png_structp, int save)); - -/* A function which may be called *only* outside (after) a call to - * png_process_data. It returns the number of bytes of data to skip in the - * input. Normally it will return 0, but if it returns a non-zero value the - * application must skip than number of bytes of input data and pass the - * following data to the next call to png_process_data. - */ -PNG_EXPORT(220, png_uint_32, png_process_data_skip, (png_structp)); - -#ifdef PNG_READ_INTERLACING_SUPPORTED -/* Function that combines rows. 'new_row' is a flag that should come from - * the callback and be non-NULL if anything needs to be done; the library - * stores its own version of the new data internally and ignores the passed - * in value. - */ -PNG_EXPORT(93, void, png_progressive_combine_row, (png_structp png_ptr, - png_bytep old_row, png_const_bytep new_row)); -#endif /* PNG_READ_INTERLACING_SUPPORTED */ -#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */ - -PNG_EXPORTA(94, png_voidp, png_malloc, - (png_structp png_ptr, png_alloc_size_t size), - PNG_ALLOCATED); -/* Added at libpng version 1.4.0 */ -PNG_EXPORTA(95, png_voidp, png_calloc, - (png_structp png_ptr, png_alloc_size_t size), - PNG_ALLOCATED); - -/* Added at libpng version 1.2.4 */ -PNG_EXPORTA(96, png_voidp, png_malloc_warn, (png_structp png_ptr, - png_alloc_size_t size), PNG_ALLOCATED); - -/* Frees a pointer allocated by png_malloc() */ -PNG_EXPORT(97, void, png_free, (png_structp png_ptr, png_voidp ptr)); - -/* Free data that was allocated internally */ -PNG_EXPORT(98, void, png_free_data, - (png_structp png_ptr, png_infop info_ptr, png_uint_32 free_me, int num)); - -/* Reassign responsibility for freeing existing data, whether allocated - * by libpng or by the application */ -PNG_EXPORT(99, void, png_data_freer, - (png_structp png_ptr, png_infop info_ptr, int freer, png_uint_32 mask)); - -/* Assignments for png_data_freer */ -#define PNG_DESTROY_WILL_FREE_DATA 1 -#define PNG_SET_WILL_FREE_DATA 1 -#define PNG_USER_WILL_FREE_DATA 2 -/* Flags for png_ptr->free_me and info_ptr->free_me */ -#define PNG_FREE_HIST 0x0008 -#define PNG_FREE_ICCP 0x0010 -#define PNG_FREE_SPLT 0x0020 -#define PNG_FREE_ROWS 0x0040 -#define PNG_FREE_PCAL 0x0080 -#define PNG_FREE_SCAL 0x0100 -#define PNG_FREE_UNKN 0x0200 -#define PNG_FREE_LIST 0x0400 -#define PNG_FREE_PLTE 0x1000 -#define PNG_FREE_TRNS 0x2000 -#define PNG_FREE_TEXT 0x4000 -#define PNG_FREE_ALL 0x7fff -#define PNG_FREE_MUL 0x4220 /* PNG_FREE_SPLT|PNG_FREE_TEXT|PNG_FREE_UNKN */ - -#ifdef PNG_USER_MEM_SUPPORTED -PNG_EXPORTA(100, png_voidp, png_malloc_default, (png_structp png_ptr, - png_alloc_size_t size), PNG_ALLOCATED); -PNG_EXPORT(101, void, png_free_default, (png_structp png_ptr, png_voidp ptr)); -#endif - -#ifdef PNG_ERROR_TEXT_SUPPORTED -/* Fatal error in PNG image of libpng - can't continue */ -PNG_EXPORTA(102, void, png_error, - (png_structp png_ptr, png_const_charp error_message), - PNG_NORETURN); - -/* The same, but the chunk name is prepended to the error string. */ -PNG_EXPORTA(103, void, png_chunk_error, (png_structp png_ptr, - png_const_charp error_message), PNG_NORETURN); - -#else -/* Fatal error in PNG image of libpng - can't continue */ -PNG_EXPORTA(104, void, png_err, (png_structp png_ptr), PNG_NORETURN); -#endif - -#ifdef PNG_WARNINGS_SUPPORTED -/* Non-fatal error in libpng. Can continue, but may have a problem. */ -PNG_EXPORT(105, void, png_warning, (png_structp png_ptr, - png_const_charp warning_message)); - -/* Non-fatal error in libpng, chunk name is prepended to message. */ -PNG_EXPORT(106, void, png_chunk_warning, (png_structp png_ptr, - png_const_charp warning_message)); -#endif - -#ifdef PNG_BENIGN_ERRORS_SUPPORTED -/* Benign error in libpng. Can continue, but may have a problem. - * User can choose whether to handle as a fatal error or as a warning. */ -# undef png_benign_error -PNG_EXPORT(107, void, png_benign_error, (png_structp png_ptr, - png_const_charp warning_message)); - -/* Same, chunk name is prepended to message. */ -# undef png_chunk_benign_error -PNG_EXPORT(108, void, png_chunk_benign_error, (png_structp png_ptr, - png_const_charp warning_message)); - -PNG_EXPORT(109, void, png_set_benign_errors, - (png_structp png_ptr, int allowed)); -#else -# ifdef PNG_ALLOW_BENIGN_ERRORS -# define png_benign_error png_warning -# define png_chunk_benign_error png_chunk_warning -# else -# define png_benign_error png_error -# define png_chunk_benign_error png_chunk_error -# endif -#endif - -/* The png_set_ functions are for storing values in the png_info_struct. - * Similarly, the png_get_ calls are used to read values from the - * png_info_struct, either storing the parameters in the passed variables, or - * setting pointers into the png_info_struct where the data is stored. The - * png_get_ functions return a non-zero value if the data was available - * in info_ptr, or return zero and do not change any of the parameters if the - * data was not available. - * - * These functions should be used instead of directly accessing png_info - * to avoid problems with future changes in the size and internal layout of - * png_info_struct. - */ -/* Returns "flag" if chunk data is valid in info_ptr. */ -PNG_EXPORT(110, png_uint_32, png_get_valid, - (png_const_structp png_ptr, png_const_infop info_ptr, - png_uint_32 flag)); - -/* Returns number of bytes needed to hold a transformed row. */ -PNG_EXPORT(111, png_size_t, png_get_rowbytes, (png_const_structp png_ptr, - png_const_infop info_ptr)); - -#ifdef PNG_INFO_IMAGE_SUPPORTED -/* Returns row_pointers, which is an array of pointers to scanlines that was - * returned from png_read_png(). - */ -PNG_EXPORT(112, png_bytepp, png_get_rows, - (png_const_structp png_ptr, png_const_infop info_ptr)); -/* Set row_pointers, which is an array of pointers to scanlines for use - * by png_write_png(). - */ -PNG_EXPORT(113, void, png_set_rows, (png_structp png_ptr, - png_infop info_ptr, png_bytepp row_pointers)); -#endif - -/* Returns number of color channels in image. */ -PNG_EXPORT(114, png_byte, png_get_channels, - (png_const_structp png_ptr, png_const_infop info_ptr)); - -#ifdef PNG_EASY_ACCESS_SUPPORTED -/* Returns image width in pixels. */ -PNG_EXPORT(115, png_uint_32, png_get_image_width, (png_const_structp png_ptr, - png_const_infop info_ptr)); - -/* Returns image height in pixels. */ -PNG_EXPORT(116, png_uint_32, png_get_image_height, (png_const_structp png_ptr, - png_const_infop info_ptr)); - -/* Returns image bit_depth. */ -PNG_EXPORT(117, png_byte, png_get_bit_depth, - (png_const_structp png_ptr, png_const_infop info_ptr)); - -/* Returns image color_type. */ -PNG_EXPORT(118, png_byte, png_get_color_type, (png_const_structp png_ptr, - png_const_infop info_ptr)); - -/* Returns image filter_type. */ -PNG_EXPORT(119, png_byte, png_get_filter_type, (png_const_structp png_ptr, - png_const_infop info_ptr)); - -/* Returns image interlace_type. */ -PNG_EXPORT(120, png_byte, png_get_interlace_type, (png_const_structp png_ptr, - png_const_infop info_ptr)); - -/* Returns image compression_type. */ -PNG_EXPORT(121, png_byte, png_get_compression_type, (png_const_structp png_ptr, - png_const_infop info_ptr)); - -/* Returns image resolution in pixels per meter, from pHYs chunk data. */ -PNG_EXPORT(122, png_uint_32, png_get_pixels_per_meter, - (png_const_structp png_ptr, png_const_infop info_ptr)); -PNG_EXPORT(123, png_uint_32, png_get_x_pixels_per_meter, - (png_const_structp png_ptr, png_const_infop info_ptr)); -PNG_EXPORT(124, png_uint_32, png_get_y_pixels_per_meter, - (png_const_structp png_ptr, png_const_infop info_ptr)); - -/* Returns pixel aspect ratio, computed from pHYs chunk data. */ -PNG_FP_EXPORT(125, float, png_get_pixel_aspect_ratio, - (png_const_structp png_ptr, png_const_infop info_ptr)); -PNG_FIXED_EXPORT(210, png_fixed_point, png_get_pixel_aspect_ratio_fixed, - (png_const_structp png_ptr, png_const_infop info_ptr)); - -/* Returns image x, y offset in pixels or microns, from oFFs chunk data. */ -PNG_EXPORT(126, png_int_32, png_get_x_offset_pixels, - (png_const_structp png_ptr, png_const_infop info_ptr)); -PNG_EXPORT(127, png_int_32, png_get_y_offset_pixels, - (png_const_structp png_ptr, png_const_infop info_ptr)); -PNG_EXPORT(128, png_int_32, png_get_x_offset_microns, - (png_const_structp png_ptr, png_const_infop info_ptr)); -PNG_EXPORT(129, png_int_32, png_get_y_offset_microns, - (png_const_structp png_ptr, png_const_infop info_ptr)); - -#endif /* PNG_EASY_ACCESS_SUPPORTED */ - -/* Returns pointer to signature string read from PNG header */ -PNG_EXPORT(130, png_const_bytep, png_get_signature, - (png_const_structp png_ptr, png_infop info_ptr)); - -#ifdef PNG_bKGD_SUPPORTED -PNG_EXPORT(131, png_uint_32, png_get_bKGD, - (png_const_structp png_ptr, png_infop info_ptr, - png_color_16p *background)); -#endif - -#ifdef PNG_bKGD_SUPPORTED -PNG_EXPORT(132, void, png_set_bKGD, (png_structp png_ptr, png_infop info_ptr, - png_const_color_16p background)); -#endif - -#ifdef PNG_cHRM_SUPPORTED -PNG_FP_EXPORT(133, png_uint_32, png_get_cHRM, (png_const_structp png_ptr, - png_const_infop info_ptr, double *white_x, double *white_y, double *red_x, - double *red_y, double *green_x, double *green_y, double *blue_x, - double *blue_y)); -PNG_FP_EXPORT(230, png_uint_32, png_get_cHRM_XYZ, (png_structp png_ptr, - png_const_infop info_ptr, double *red_X, double *red_Y, double *red_Z, - double *green_X, double *green_Y, double *green_Z, double *blue_X, - double *blue_Y, double *blue_Z)); -#ifdef PNG_FIXED_POINT_SUPPORTED /* Otherwise not implemented */ -PNG_FIXED_EXPORT(134, png_uint_32, png_get_cHRM_fixed, - (png_const_structp png_ptr, - png_const_infop info_ptr, png_fixed_point *int_white_x, - png_fixed_point *int_white_y, png_fixed_point *int_red_x, - png_fixed_point *int_red_y, png_fixed_point *int_green_x, - png_fixed_point *int_green_y, png_fixed_point *int_blue_x, - png_fixed_point *int_blue_y)); -#endif -PNG_FIXED_EXPORT(231, png_uint_32, png_get_cHRM_XYZ_fixed, - (png_structp png_ptr, png_const_infop info_ptr, - png_fixed_point *int_red_X, png_fixed_point *int_red_Y, - png_fixed_point *int_red_Z, png_fixed_point *int_green_X, - png_fixed_point *int_green_Y, png_fixed_point *int_green_Z, - png_fixed_point *int_blue_X, png_fixed_point *int_blue_Y, - png_fixed_point *int_blue_Z)); -#endif - -#ifdef PNG_cHRM_SUPPORTED -PNG_FP_EXPORT(135, void, png_set_cHRM, - (png_structp png_ptr, png_infop info_ptr, - double white_x, double white_y, double red_x, double red_y, double green_x, - double green_y, double blue_x, double blue_y)); -PNG_FP_EXPORT(232, void, png_set_cHRM_XYZ, (png_structp png_ptr, - png_infop info_ptr, double red_X, double red_Y, double red_Z, - double green_X, double green_Y, double green_Z, double blue_X, - double blue_Y, double blue_Z)); -PNG_FIXED_EXPORT(136, void, png_set_cHRM_fixed, (png_structp png_ptr, - png_infop info_ptr, png_fixed_point int_white_x, - png_fixed_point int_white_y, png_fixed_point int_red_x, - png_fixed_point int_red_y, png_fixed_point int_green_x, - png_fixed_point int_green_y, png_fixed_point int_blue_x, - png_fixed_point int_blue_y)); -PNG_FIXED_EXPORT(233, void, png_set_cHRM_XYZ_fixed, (png_structp png_ptr, - png_infop info_ptr, png_fixed_point int_red_X, png_fixed_point int_red_Y, - png_fixed_point int_red_Z, png_fixed_point int_green_X, - png_fixed_point int_green_Y, png_fixed_point int_green_Z, - png_fixed_point int_blue_X, png_fixed_point int_blue_Y, - png_fixed_point int_blue_Z)); -#endif - -#ifdef PNG_gAMA_SUPPORTED -PNG_FP_EXPORT(137, png_uint_32, png_get_gAMA, - (png_const_structp png_ptr, png_const_infop info_ptr, - double *file_gamma)); -PNG_FIXED_EXPORT(138, png_uint_32, png_get_gAMA_fixed, - (png_const_structp png_ptr, png_const_infop info_ptr, - png_fixed_point *int_file_gamma)); -#endif - -#ifdef PNG_gAMA_SUPPORTED -PNG_FP_EXPORT(139, void, png_set_gAMA, (png_structp png_ptr, - png_infop info_ptr, double file_gamma)); -PNG_FIXED_EXPORT(140, void, png_set_gAMA_fixed, (png_structp png_ptr, - png_infop info_ptr, png_fixed_point int_file_gamma)); -#endif - -#ifdef PNG_hIST_SUPPORTED -PNG_EXPORT(141, png_uint_32, png_get_hIST, - (png_const_structp png_ptr, png_const_infop info_ptr, - png_uint_16p *hist)); -#endif - -#ifdef PNG_hIST_SUPPORTED -PNG_EXPORT(142, void, png_set_hIST, (png_structp png_ptr, - png_infop info_ptr, png_const_uint_16p hist)); -#endif - -PNG_EXPORT(143, png_uint_32, png_get_IHDR, - (png_structp png_ptr, png_infop info_ptr, - png_uint_32 *width, png_uint_32 *height, int *bit_depth, int *color_type, - int *interlace_method, int *compression_method, int *filter_method)); - -PNG_EXPORT(144, void, png_set_IHDR, - (png_structp png_ptr, png_infop info_ptr, - png_uint_32 width, png_uint_32 height, int bit_depth, int color_type, - int interlace_method, int compression_method, int filter_method)); - -#ifdef PNG_oFFs_SUPPORTED -PNG_EXPORT(145, png_uint_32, png_get_oFFs, - (png_const_structp png_ptr, png_const_infop info_ptr, - png_int_32 *offset_x, png_int_32 *offset_y, int *unit_type)); -#endif - -#ifdef PNG_oFFs_SUPPORTED -PNG_EXPORT(146, void, png_set_oFFs, - (png_structp png_ptr, png_infop info_ptr, - png_int_32 offset_x, png_int_32 offset_y, int unit_type)); -#endif - -#ifdef PNG_pCAL_SUPPORTED -PNG_EXPORT(147, png_uint_32, png_get_pCAL, - (png_const_structp png_ptr, png_const_infop info_ptr, - png_charp *purpose, png_int_32 *X0, png_int_32 *X1, int *type, - int *nparams, - png_charp *units, png_charpp *params)); -#endif - -#ifdef PNG_pCAL_SUPPORTED -PNG_EXPORT(148, void, png_set_pCAL, (png_structp png_ptr, - png_infop info_ptr, - png_const_charp purpose, png_int_32 X0, png_int_32 X1, int type, - int nparams, png_const_charp units, png_charpp params)); -#endif - -#ifdef PNG_pHYs_SUPPORTED -PNG_EXPORT(149, png_uint_32, png_get_pHYs, - (png_const_structp png_ptr, png_const_infop info_ptr, - png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)); -#endif - -#ifdef PNG_pHYs_SUPPORTED -PNG_EXPORT(150, void, png_set_pHYs, - (png_structp png_ptr, png_infop info_ptr, - png_uint_32 res_x, png_uint_32 res_y, int unit_type)); -#endif - -PNG_EXPORT(151, png_uint_32, png_get_PLTE, - (png_const_structp png_ptr, png_const_infop info_ptr, - png_colorp *palette, int *num_palette)); - -PNG_EXPORT(152, void, png_set_PLTE, - (png_structp png_ptr, png_infop info_ptr, - png_const_colorp palette, int num_palette)); - -#ifdef PNG_sBIT_SUPPORTED -PNG_EXPORT(153, png_uint_32, png_get_sBIT, - (png_const_structp png_ptr, png_infop info_ptr, - png_color_8p *sig_bit)); -#endif - -#ifdef PNG_sBIT_SUPPORTED -PNG_EXPORT(154, void, png_set_sBIT, - (png_structp png_ptr, png_infop info_ptr, png_const_color_8p sig_bit)); -#endif - -#ifdef PNG_sRGB_SUPPORTED -PNG_EXPORT(155, png_uint_32, png_get_sRGB, (png_const_structp png_ptr, - png_const_infop info_ptr, int *file_srgb_intent)); -#endif - -#ifdef PNG_sRGB_SUPPORTED -PNG_EXPORT(156, void, png_set_sRGB, - (png_structp png_ptr, png_infop info_ptr, int srgb_intent)); -PNG_EXPORT(157, void, png_set_sRGB_gAMA_and_cHRM, (png_structp png_ptr, - png_infop info_ptr, int srgb_intent)); -#endif - -#ifdef PNG_iCCP_SUPPORTED -PNG_EXPORT(158, png_uint_32, png_get_iCCP, - (png_const_structp png_ptr, png_const_infop info_ptr, - png_charpp name, int *compression_type, png_bytepp profile, - png_uint_32 *proflen)); -#endif - -#ifdef PNG_iCCP_SUPPORTED -PNG_EXPORT(159, void, png_set_iCCP, - (png_structp png_ptr, png_infop info_ptr, - png_const_charp name, int compression_type, png_const_bytep profile, - png_uint_32 proflen)); -#endif - -#ifdef PNG_sPLT_SUPPORTED -PNG_EXPORT(160, png_uint_32, png_get_sPLT, - (png_const_structp png_ptr, png_const_infop info_ptr, - png_sPLT_tpp entries)); -#endif - -#ifdef PNG_sPLT_SUPPORTED -PNG_EXPORT(161, void, png_set_sPLT, - (png_structp png_ptr, png_infop info_ptr, - png_const_sPLT_tp entries, int nentries)); -#endif - -#ifdef PNG_TEXT_SUPPORTED -/* png_get_text also returns the number of text chunks in *num_text */ -PNG_EXPORT(162, png_uint_32, png_get_text, - (png_const_structp png_ptr, png_const_infop info_ptr, - png_textp *text_ptr, int *num_text)); -#endif - -/* Note while png_set_text() will accept a structure whose text, - * language, and translated keywords are NULL pointers, the structure - * returned by png_get_text will always contain regular - * zero-terminated C strings. They might be empty strings but - * they will never be NULL pointers. - */ - -#ifdef PNG_TEXT_SUPPORTED -PNG_EXPORT(163, void, png_set_text, - (png_structp png_ptr, png_infop info_ptr, - png_const_textp text_ptr, int num_text)); -#endif - -#ifdef PNG_tIME_SUPPORTED -PNG_EXPORT(164, png_uint_32, png_get_tIME, - (png_const_structp png_ptr, png_infop info_ptr, png_timep *mod_time)); -#endif - -#ifdef PNG_tIME_SUPPORTED -PNG_EXPORT(165, void, png_set_tIME, - (png_structp png_ptr, png_infop info_ptr, png_const_timep mod_time)); -#endif - -#ifdef PNG_tRNS_SUPPORTED -PNG_EXPORT(166, png_uint_32, png_get_tRNS, - (png_const_structp png_ptr, png_infop info_ptr, - png_bytep *trans_alpha, int *num_trans, png_color_16p *trans_color)); -#endif - -#ifdef PNG_tRNS_SUPPORTED -PNG_EXPORT(167, void, png_set_tRNS, - (png_structp png_ptr, png_infop info_ptr, - png_const_bytep trans_alpha, int num_trans, - png_const_color_16p trans_color)); -#endif - -#ifdef PNG_sCAL_SUPPORTED -PNG_FP_EXPORT(168, png_uint_32, png_get_sCAL, - (png_const_structp png_ptr, png_const_infop info_ptr, - int *unit, double *width, double *height)); -#ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED -/* NOTE: this API is currently implemented using floating point arithmetic, - * consequently it can only be used on systems with floating point support. - * In any case the range of values supported by png_fixed_point is small and it - * is highly recommended that png_get_sCAL_s be used instead. - */ -PNG_FIXED_EXPORT(214, png_uint_32, png_get_sCAL_fixed, - (png_structp png_ptr, png_const_infop info_ptr, int *unit, - png_fixed_point *width, - png_fixed_point *height)); -#endif -PNG_EXPORT(169, png_uint_32, png_get_sCAL_s, - (png_const_structp png_ptr, png_const_infop info_ptr, - int *unit, png_charpp swidth, png_charpp sheight)); - -PNG_FP_EXPORT(170, void, png_set_sCAL, - (png_structp png_ptr, png_infop info_ptr, - int unit, double width, double height)); -PNG_FIXED_EXPORT(213, void, png_set_sCAL_fixed, (png_structp png_ptr, - png_infop info_ptr, int unit, png_fixed_point width, - png_fixed_point height)); -PNG_EXPORT(171, void, png_set_sCAL_s, - (png_structp png_ptr, png_infop info_ptr, - int unit, png_const_charp swidth, png_const_charp sheight)); -#endif /* PNG_sCAL_SUPPORTED */ - -#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED -/* Provide a list of chunks and how they are to be handled, if the built-in - handling or default unknown chunk handling is not desired. Any chunks not - listed will be handled in the default manner. The IHDR and IEND chunks - must not be listed. Because this turns off the default handling for chunks - that would otherwise be recognized the behavior of libpng transformations may - well become incorrect! - keep = 0: PNG_HANDLE_CHUNK_AS_DEFAULT: follow default behavior - = 1: PNG_HANDLE_CHUNK_NEVER: do not keep - = 2: PNG_HANDLE_CHUNK_IF_SAFE: keep only if safe-to-copy - = 3: PNG_HANDLE_CHUNK_ALWAYS: keep even if unsafe-to-copy -*/ -PNG_EXPORT(172, void, png_set_keep_unknown_chunks, - (png_structp png_ptr, int keep, - png_const_bytep chunk_list, int num_chunks)); - -/* The handling code is returned; the result is therefore true (non-zero) if - * special handling is required, false for the default handling. - */ -PNG_EXPORT(173, int, png_handle_as_unknown, (png_structp png_ptr, - png_const_bytep chunk_name)); -#endif -#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED -PNG_EXPORT(174, void, png_set_unknown_chunks, (png_structp png_ptr, - png_infop info_ptr, png_const_unknown_chunkp unknowns, - int num_unknowns)); -PNG_EXPORT(175, void, png_set_unknown_chunk_location, - (png_structp png_ptr, png_infop info_ptr, int chunk, int location)); -PNG_EXPORT(176, int, png_get_unknown_chunks, (png_const_structp png_ptr, - png_const_infop info_ptr, png_unknown_chunkpp entries)); -#endif - -/* Png_free_data() will turn off the "valid" flag for anything it frees. - * If you need to turn it off for a chunk that your application has freed, - * you can use png_set_invalid(png_ptr, info_ptr, PNG_INFO_CHNK); - */ -PNG_EXPORT(177, void, png_set_invalid, - (png_structp png_ptr, png_infop info_ptr, int mask)); - -#ifdef PNG_INFO_IMAGE_SUPPORTED -/* The "params" pointer is currently not used and is for future expansion. */ -PNG_EXPORT(178, void, png_read_png, (png_structp png_ptr, png_infop info_ptr, - int transforms, png_voidp params)); -PNG_EXPORT(179, void, png_write_png, (png_structp png_ptr, png_infop info_ptr, - int transforms, png_voidp params)); -#endif - -PNG_EXPORT(180, png_const_charp, png_get_copyright, - (png_const_structp png_ptr)); -PNG_EXPORT(181, png_const_charp, png_get_header_ver, - (png_const_structp png_ptr)); -PNG_EXPORT(182, png_const_charp, png_get_header_version, - (png_const_structp png_ptr)); -PNG_EXPORT(183, png_const_charp, png_get_libpng_ver, - (png_const_structp png_ptr)); - -#ifdef PNG_MNG_FEATURES_SUPPORTED -PNG_EXPORT(184, png_uint_32, png_permit_mng_features, (png_structp png_ptr, - png_uint_32 mng_features_permitted)); -#endif - -/* For use in png_set_keep_unknown, added to version 1.2.6 */ -#define PNG_HANDLE_CHUNK_AS_DEFAULT 0 -#define PNG_HANDLE_CHUNK_NEVER 1 -#define PNG_HANDLE_CHUNK_IF_SAFE 2 -#define PNG_HANDLE_CHUNK_ALWAYS 3 - -/* Strip the prepended error numbers ("#nnn ") from error and warning - * messages before passing them to the error or warning handler. - */ -#ifdef PNG_ERROR_NUMBERS_SUPPORTED -PNG_EXPORT(185, void, png_set_strip_error_numbers, - (png_structp png_ptr, - png_uint_32 strip_mode)); -#endif - -/* Added in libpng-1.2.6 */ -#ifdef PNG_SET_USER_LIMITS_SUPPORTED -PNG_EXPORT(186, void, png_set_user_limits, (png_structp png_ptr, - png_uint_32 user_width_max, png_uint_32 user_height_max)); -PNG_EXPORT(187, png_uint_32, png_get_user_width_max, - (png_const_structp png_ptr)); -PNG_EXPORT(188, png_uint_32, png_get_user_height_max, - (png_const_structp png_ptr)); -/* Added in libpng-1.4.0 */ -PNG_EXPORT(189, void, png_set_chunk_cache_max, (png_structp png_ptr, - png_uint_32 user_chunk_cache_max)); -PNG_EXPORT(190, png_uint_32, png_get_chunk_cache_max, - (png_const_structp png_ptr)); -/* Added in libpng-1.4.1 */ -PNG_EXPORT(191, void, png_set_chunk_malloc_max, (png_structp png_ptr, - png_alloc_size_t user_chunk_cache_max)); -PNG_EXPORT(192, png_alloc_size_t, png_get_chunk_malloc_max, - (png_const_structp png_ptr)); -#endif - -#if defined(PNG_INCH_CONVERSIONS_SUPPORTED) -PNG_EXPORT(193, png_uint_32, png_get_pixels_per_inch, - (png_const_structp png_ptr, png_const_infop info_ptr)); - -PNG_EXPORT(194, png_uint_32, png_get_x_pixels_per_inch, - (png_const_structp png_ptr, png_const_infop info_ptr)); - -PNG_EXPORT(195, png_uint_32, png_get_y_pixels_per_inch, - (png_const_structp png_ptr, png_const_infop info_ptr)); - -PNG_FP_EXPORT(196, float, png_get_x_offset_inches, - (png_const_structp png_ptr, png_const_infop info_ptr)); -#ifdef PNG_FIXED_POINT_SUPPORTED /* otherwise not implemented. */ -PNG_FIXED_EXPORT(211, png_fixed_point, png_get_x_offset_inches_fixed, - (png_structp png_ptr, png_const_infop info_ptr)); -#endif - -PNG_FP_EXPORT(197, float, png_get_y_offset_inches, (png_const_structp png_ptr, - png_const_infop info_ptr)); -#ifdef PNG_FIXED_POINT_SUPPORTED /* otherwise not implemented. */ -PNG_FIXED_EXPORT(212, png_fixed_point, png_get_y_offset_inches_fixed, - (png_structp png_ptr, png_const_infop info_ptr)); -#endif - -# ifdef PNG_pHYs_SUPPORTED -PNG_EXPORT(198, png_uint_32, png_get_pHYs_dpi, (png_const_structp png_ptr, - png_const_infop info_ptr, png_uint_32 *res_x, png_uint_32 *res_y, - int *unit_type)); -# endif /* PNG_pHYs_SUPPORTED */ -#endif /* PNG_INCH_CONVERSIONS_SUPPORTED */ - -/* Added in libpng-1.4.0 */ -#ifdef PNG_IO_STATE_SUPPORTED -PNG_EXPORT(199, png_uint_32, png_get_io_state, (png_structp png_ptr)); - -PNG_EXPORTA(200, png_const_bytep, png_get_io_chunk_name, - (png_structp png_ptr), PNG_DEPRECATED); -PNG_EXPORT(216, png_uint_32, png_get_io_chunk_type, - (png_const_structp png_ptr)); - -/* The flags returned by png_get_io_state() are the following: */ -# define PNG_IO_NONE 0x0000 /* no I/O at this moment */ -# define PNG_IO_READING 0x0001 /* currently reading */ -# define PNG_IO_WRITING 0x0002 /* currently writing */ -# define PNG_IO_SIGNATURE 0x0010 /* currently at the file signature */ -# define PNG_IO_CHUNK_HDR 0x0020 /* currently at the chunk header */ -# define PNG_IO_CHUNK_DATA 0x0040 /* currently at the chunk data */ -# define PNG_IO_CHUNK_CRC 0x0080 /* currently at the chunk crc */ -# define PNG_IO_MASK_OP 0x000f /* current operation: reading/writing */ -# define PNG_IO_MASK_LOC 0x00f0 /* current location: sig/hdr/data/crc */ -#endif /* ?PNG_IO_STATE_SUPPORTED */ - -/* Interlace support. The following macros are always defined so that if - * libpng interlace handling is turned off the macros may be used to handle - * interlaced images within the application. - */ -#define PNG_INTERLACE_ADAM7_PASSES 7 - -/* Two macros to return the first row and first column of the original, - * full, image which appears in a given pass. 'pass' is in the range 0 - * to 6 and the result is in the range 0 to 7. - */ -#define PNG_PASS_START_ROW(pass) (((1&~(pass))<<(3-((pass)>>1)))&7) -#define PNG_PASS_START_COL(pass) (((1& (pass))<<(3-(((pass)+1)>>1)))&7) - -/* A macro to return the offset between pixels in the output row for a pair of - * pixels in the input - effectively the inverse of the 'COL_SHIFT' macro that - * follows. Note that ROW_OFFSET is the offset from one row to the next whereas - * COL_OFFSET is from one column to the next, within a row. - */ -#define PNG_PASS_ROW_OFFSET(pass) ((pass)>2?(8>>(((pass)-1)>>1)):8) -#define PNG_PASS_COL_OFFSET(pass) (1<<((7-(pass))>>1)) - -/* Two macros to help evaluate the number of rows or columns in each - * pass. This is expressed as a shift - effectively log2 of the number or - * rows or columns in each 8x8 tile of the original image. - */ -#define PNG_PASS_ROW_SHIFT(pass) ((pass)>2?(8-(pass))>>1:3) -#define PNG_PASS_COL_SHIFT(pass) ((pass)>1?(7-(pass))>>1:3) - -/* Hence two macros to determine the number of rows or columns in a given - * pass of an image given its height or width. In fact these macros may - * return non-zero even though the sub-image is empty, because the other - * dimension may be empty for a small image. - */ -#define PNG_PASS_ROWS(height, pass) (((height)+(((1<>PNG_PASS_ROW_SHIFT(pass)) -#define PNG_PASS_COLS(width, pass) (((width)+(((1<>PNG_PASS_COL_SHIFT(pass)) - -/* For the reader row callbacks (both progressive and sequential) it is - * necessary to find the row in the output image given a row in an interlaced - * image, so two more macros: - */ -#define PNG_ROW_FROM_PASS_ROW(yIn, pass) \ - (((yIn)<>(((7-(off))-(pass))<<2)) & 0xF) | \ - ((0x01145AF0>>(((7-(off))-(pass))<<2)) & 0xF0)) - -#define PNG_ROW_IN_INTERLACE_PASS(y, pass) \ - ((PNG_PASS_MASK(pass,0) >> ((y)&7)) & 1) -#define PNG_COL_IN_INTERLACE_PASS(x, pass) \ - ((PNG_PASS_MASK(pass,1) >> ((x)&7)) & 1) - -#ifdef PNG_READ_COMPOSITE_NODIV_SUPPORTED -/* With these routines we avoid an integer divide, which will be slower on - * most machines. However, it does take more operations than the corresponding - * divide method, so it may be slower on a few RISC systems. There are two - * shifts (by 8 or 16 bits) and an addition, versus a single integer divide. - * - * Note that the rounding factors are NOT supposed to be the same! 128 and - * 32768 are correct for the NODIV code; 127 and 32767 are correct for the - * standard method. - * - * [Optimized code by Greg Roelofs and Mark Adler...blame us for bugs. :-) ] - */ - - /* fg and bg should be in `gamma 1.0' space; alpha is the opacity */ - -# define png_composite(composite, fg, alpha, bg) \ - { png_uint_16 temp = (png_uint_16)((png_uint_16)(fg) \ - * (png_uint_16)(alpha) \ - + (png_uint_16)(bg)*(png_uint_16)(255 \ - - (png_uint_16)(alpha)) + 128); \ - (composite) = (png_byte)((temp + (temp >> 8)) >> 8); } - -# define png_composite_16(composite, fg, alpha, bg) \ - { png_uint_32 temp = (png_uint_32)((png_uint_32)(fg) \ - * (png_uint_32)(alpha) \ - + (png_uint_32)(bg)*(65535 \ - - (png_uint_32)(alpha)) + 32768); \ - (composite) = (png_uint_16)((temp + (temp >> 16)) >> 16); } - -#else /* Standard method using integer division */ - -# define png_composite(composite, fg, alpha, bg) \ - (composite) = (png_byte)(((png_uint_16)(fg) * (png_uint_16)(alpha) + \ - (png_uint_16)(bg) * (png_uint_16)(255 - (png_uint_16)(alpha)) + \ - 127) / 255) - -# define png_composite_16(composite, fg, alpha, bg) \ - (composite) = (png_uint_16)(((png_uint_32)(fg) * (png_uint_32)(alpha) + \ - (png_uint_32)(bg)*(png_uint_32)(65535 - (png_uint_32)(alpha)) + \ - 32767) / 65535) -#endif /* PNG_READ_COMPOSITE_NODIV_SUPPORTED */ - -#ifdef PNG_READ_INT_FUNCTIONS_SUPPORTED -PNG_EXPORT(201, png_uint_32, png_get_uint_32, (png_const_bytep buf)); -PNG_EXPORT(202, png_uint_16, png_get_uint_16, (png_const_bytep buf)); -PNG_EXPORT(203, png_int_32, png_get_int_32, (png_const_bytep buf)); -#endif - -PNG_EXPORT(204, png_uint_32, png_get_uint_31, (png_structp png_ptr, - png_const_bytep buf)); -/* No png_get_int_16 -- may be added if there's a real need for it. */ - -/* Place a 32-bit number into a buffer in PNG byte order (big-endian). */ -#ifdef PNG_WRITE_INT_FUNCTIONS_SUPPORTED -PNG_EXPORT(205, void, png_save_uint_32, (png_bytep buf, png_uint_32 i)); -#endif -#ifdef PNG_SAVE_INT_32_SUPPORTED -PNG_EXPORT(206, void, png_save_int_32, (png_bytep buf, png_int_32 i)); -#endif - -/* Place a 16-bit number into a buffer in PNG byte order. - * The parameter is declared unsigned int, not png_uint_16, - * just to avoid potential problems on pre-ANSI C compilers. - */ -#ifdef PNG_WRITE_INT_FUNCTIONS_SUPPORTED -PNG_EXPORT(207, void, png_save_uint_16, (png_bytep buf, unsigned int i)); -/* No png_save_int_16 -- may be added if there's a real need for it. */ -#endif - -#ifdef PNG_USE_READ_MACROS -/* Inline macros to do direct reads of bytes from the input buffer. - * The png_get_int_32() routine assumes we are using two's complement - * format for negative values, which is almost certainly true. - */ -# define png_get_uint_32(buf) \ - (((png_uint_32)(*(buf)) << 24) + \ - ((png_uint_32)(*((buf) + 1)) << 16) + \ - ((png_uint_32)(*((buf) + 2)) << 8) + \ - ((png_uint_32)(*((buf) + 3)))) - - /* From libpng-1.4.0 until 1.4.4, the png_get_uint_16 macro (but not the - * function) incorrectly returned a value of type png_uint_32. - */ -# define png_get_uint_16(buf) \ - ((png_uint_16) \ - (((unsigned int)(*(buf)) << 8) + \ - ((unsigned int)(*((buf) + 1))))) - -# define png_get_int_32(buf) \ - ((png_int_32)((*(buf) & 0x80) \ - ? -((png_int_32)((png_get_uint_32(buf) ^ 0xffffffffL) + 1)) \ - : (png_int_32)png_get_uint_32(buf))) -#endif - -#if defined(PNG_READ_CHECK_FOR_INVALID_INDEX_SUPPORTED) || \ - defined(PNG_WRITE_CHECK_FOR_INVALID_INDEX_SUPPORTED) -PNG_EXPORT(234, void, png_set_check_for_invalid_index, (png_structp png_ptr, - int allowed)); -#endif - -/* Maintainer: Put new public prototypes here ^, in libpng.3, and project - * defs - */ - -/* The last ordinal number (this is the *last* one already used; the next - * one to use is one more than this.) Maintainer, remember to add an entry to - * scripts/symbols.def as well. - */ -#ifdef PNG_EXPORT_LAST_ORDINAL - PNG_EXPORT_LAST_ORDINAL(234); -#endif - -#ifdef __cplusplus -} -#endif - -#endif /* PNG_VERSION_INFO_ONLY */ -/* Do not put anything past this line */ -#endif /* PNG_H */ diff --git a/extern/libpng/include/pngconf.h b/extern/libpng/include/pngconf.h deleted file mode 100644 index bbb547f8eb..0000000000 --- a/extern/libpng/include/pngconf.h +++ /dev/null @@ -1,596 +0,0 @@ - -/* pngconf.h - machine configurable file for libpng - * - * libpng version 1.5.10 - March 29, 2012 - * - * Copyright (c) 1998-2012 Glenn Randers-Pehrson - * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) - * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) - * - * This code is released under the libpng license. - * For conditions of distribution and use, see the disclaimer - * and license in png.h - * - */ - -/* Any machine specific code is near the front of this file, so if you - * are configuring libpng for a machine, you may want to read the section - * starting here down to where it starts to typedef png_color, png_text, - * and png_info. - */ - -#ifndef PNGCONF_H -#define PNGCONF_H - -#ifndef PNG_BUILDING_SYMBOL_TABLE -/* PNG_NO_LIMITS_H may be used to turn off the use of the standard C - * definition file for machine specific limits, this may impact the - * correctness of the definitons below (see uses of INT_MAX). - */ -# ifndef PNG_NO_LIMITS_H -# include -# endif - -/* For the memory copy APIs (i.e. the standard definitions of these), - * because this file defines png_memcpy and so on the base APIs must - * be defined here. - */ -# ifdef BSD -# include -# else -# include -# endif - -/* For png_FILE_p - this provides the standard definition of a - * FILE - */ -# ifdef PNG_STDIO_SUPPORTED -# include -# endif -#endif - -/* This controls optimization of the reading of 16 and 32 bit values - * from PNG files. It can be set on a per-app-file basis - it - * just changes whether a macro is used when the function is called. - * The library builder sets the default; if read functions are not - * built into the library the macro implementation is forced on. - */ -#ifndef PNG_READ_INT_FUNCTIONS_SUPPORTED -# define PNG_USE_READ_MACROS -#endif -#if !defined(PNG_NO_USE_READ_MACROS) && !defined(PNG_USE_READ_MACROS) -# if PNG_DEFAULT_READ_MACROS -# define PNG_USE_READ_MACROS -# endif -#endif - -/* COMPILER SPECIFIC OPTIONS. - * - * These options are provided so that a variety of difficult compilers - * can be used. Some are fixed at build time (e.g. PNG_API_RULE - * below) but still have compiler specific implementations, others - * may be changed on a per-file basis when compiling against libpng. - */ - -/* The PNGARG macro protects us against machines that don't have function - * prototypes (ie K&R style headers). If your compiler does not handle - * function prototypes, define this macro and use the included ansi2knr. - * I've always been able to use _NO_PROTO as the indicator, but you may - * need to drag the empty declaration out in front of here, or change the - * ifdef to suit your own needs. - */ -#ifndef PNGARG - -# ifdef OF /* zlib prototype munger */ -# define PNGARG(arglist) OF(arglist) -# else - -# ifdef _NO_PROTO -# define PNGARG(arglist) () -# else -# define PNGARG(arglist) arglist -# endif /* _NO_PROTO */ - -# endif /* OF */ - -#endif /* PNGARG */ - -/* Function calling conventions. - * ============================= - * Normally it is not necessary to specify to the compiler how to call - * a function - it just does it - however on x86 systems derived from - * Microsoft and Borland C compilers ('IBM PC', 'DOS', 'Windows' systems - * and some others) there are multiple ways to call a function and the - * default can be changed on the compiler command line. For this reason - * libpng specifies the calling convention of every exported function and - * every function called via a user supplied function pointer. This is - * done in this file by defining the following macros: - * - * PNGAPI Calling convention for exported functions. - * PNGCBAPI Calling convention for user provided (callback) functions. - * PNGCAPI Calling convention used by the ANSI-C library (required - * for longjmp callbacks and sometimes used internally to - * specify the calling convention for zlib). - * - * These macros should never be overridden. If it is necessary to - * change calling convention in a private build this can be done - * by setting PNG_API_RULE (which defaults to 0) to one of the values - * below to select the correct 'API' variants. - * - * PNG_API_RULE=0 Use PNGCAPI - the 'C' calling convention - throughout. - * This is correct in every known environment. - * PNG_API_RULE=1 Use the operating system convention for PNGAPI and - * the 'C' calling convention (from PNGCAPI) for - * callbacks (PNGCBAPI). This is no longer required - * in any known environment - if it has to be used - * please post an explanation of the problem to the - * libpng mailing list. - * - * These cases only differ if the operating system does not use the C - * calling convention, at present this just means the above cases - * (x86 DOS/Windows sytems) and, even then, this does not apply to - * Cygwin running on those systems. - * - * Note that the value must be defined in pnglibconf.h so that what - * the application uses to call the library matches the conventions - * set when building the library. - */ - -/* Symbol export - * ============= - * When building a shared library it is almost always necessary to tell - * the compiler which symbols to export. The png.h macro 'PNG_EXPORT' - * is used to mark the symbols. On some systems these symbols can be - * extracted at link time and need no special processing by the compiler, - * on other systems the symbols are flagged by the compiler and just - * the declaration requires a special tag applied (unfortunately) in a - * compiler dependent way. Some systems can do either. - * - * A small number of older systems also require a symbol from a DLL to - * be flagged to the program that calls it. This is a problem because - * we do not know in the header file included by application code that - * the symbol will come from a shared library, as opposed to a statically - * linked one. For this reason the application must tell us by setting - * the magic flag PNG_USE_DLL to turn on the special processing before - * it includes png.h. - * - * Four additional macros are used to make this happen: - * - * PNG_IMPEXP The magic (if any) to cause a symbol to be exported from - * the build or imported if PNG_USE_DLL is set - compiler - * and system specific. - * - * PNG_EXPORT_TYPE(type) A macro that pre or appends PNG_IMPEXP to - * 'type', compiler specific. - * - * PNG_DLL_EXPORT Set to the magic to use during a libpng build to - * make a symbol exported from the DLL. Not used in the - * public header files; see pngpriv.h for how it is used - * in the libpng build. - * - * PNG_DLL_IMPORT Set to the magic to force the libpng symbols to come - * from a DLL - used to define PNG_IMPEXP when - * PNG_USE_DLL is set. - */ - -/* System specific discovery. - * ========================== - * This code is used at build time to find PNG_IMPEXP, the API settings - * and PNG_EXPORT_TYPE(), it may also set a macro to indicate the DLL - * import processing is possible. On Windows/x86 systems it also sets - * compiler-specific macros to the values required to change the calling - * conventions of the various functions. - */ -#if ( defined(_Windows) || defined(_WINDOWS) || defined(WIN32) ||\ - defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__) ) &&\ - ( defined(_X86_) || defined(_X64_) || defined(_M_IX86) ||\ - defined(_M_X64) || defined(_M_IA64) ) - /* Windows system (DOS doesn't support DLLs) running on x86/x64. Includes - * builds under Cygwin or MinGW. Also includes Watcom builds but these need - * special treatment because they are not compatible with GCC or Visual C - * because of different calling conventions. - */ -# if PNG_API_RULE == 2 - /* If this line results in an error, either because __watcall is not - * understood or because of a redefine just below you cannot use *this* - * build of the library with the compiler you are using. *This* build was - * build using Watcom and applications must also be built using Watcom! - */ -# define PNGCAPI __watcall -# endif - -# if defined(__GNUC__) || (defined (_MSC_VER) && (_MSC_VER >= 800)) -# define PNGCAPI __cdecl -# if PNG_API_RULE == 1 -# define PNGAPI __stdcall -# endif -# else - /* An older compiler, or one not detected (erroneously) above, - * if necessary override on the command line to get the correct - * variants for the compiler. - */ -# ifndef PNGCAPI -# define PNGCAPI _cdecl -# endif -# if PNG_API_RULE == 1 && !defined(PNGAPI) -# define PNGAPI _stdcall -# endif -# endif /* compiler/api */ - /* NOTE: PNGCBAPI always defaults to PNGCAPI. */ - -# if defined(PNGAPI) && !defined(PNG_USER_PRIVATEBUILD) - ERROR: PNG_USER_PRIVATEBUILD must be defined if PNGAPI is changed -# endif - -# if (defined(_MSC_VER) && _MSC_VER < 800) ||\ - (defined(__BORLANDC__) && __BORLANDC__ < 0x500) - /* older Borland and MSC - * compilers used '__export' and required this to be after - * the type. - */ -# ifndef PNG_EXPORT_TYPE -# define PNG_EXPORT_TYPE(type) type PNG_IMPEXP -# endif -# define PNG_DLL_EXPORT __export -# else /* newer compiler */ -# define PNG_DLL_EXPORT __declspec(dllexport) -# ifndef PNG_DLL_IMPORT -# define PNG_DLL_IMPORT __declspec(dllimport) -# endif -# endif /* compiler */ - -#else /* !Windows/x86 */ -# if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__) -# define PNGAPI _System -# else /* !Windows/x86 && !OS/2 */ - /* Use the defaults, or define PNG*API on the command line (but - * this will have to be done for every compile!) - */ -# endif /* other system, !OS/2 */ -#endif /* !Windows/x86 */ - -/* Now do all the defaulting . */ -#ifndef PNGCAPI -# define PNGCAPI -#endif -#ifndef PNGCBAPI -# define PNGCBAPI PNGCAPI -#endif -#ifndef PNGAPI -# define PNGAPI PNGCAPI -#endif - -/* PNG_IMPEXP may be set on the compilation system command line or (if not set) - * then in an internal header file when building the library, otherwise (when - * using the library) it is set here. - */ -#ifndef PNG_IMPEXP -# if defined(PNG_USE_DLL) && defined(PNG_DLL_IMPORT) - /* This forces use of a DLL, disallowing static linking */ -# define PNG_IMPEXP PNG_DLL_IMPORT -# endif - -# ifndef PNG_IMPEXP -# define PNG_IMPEXP -# endif -#endif - -/* In 1.5.2 the definition of PNG_FUNCTION has been changed to always treat - * 'attributes' as a storage class - the attributes go at the start of the - * function definition, and attributes are always appended regardless of the - * compiler. This considerably simplifies these macros but may cause problems - * if any compilers both need function attributes and fail to handle them as - * a storage class (this is unlikely.) - */ -#ifndef PNG_FUNCTION -# define PNG_FUNCTION(type, name, args, attributes) attributes type name args -#endif - -#ifndef PNG_EXPORT_TYPE -# define PNG_EXPORT_TYPE(type) PNG_IMPEXP type -#endif - - /* The ordinal value is only relevant when preprocessing png.h for symbol - * table entries, so we discard it here. See the .dfn files in the - * scripts directory. - */ -#ifndef PNG_EXPORTA - -# define PNG_EXPORTA(ordinal, type, name, args, attributes)\ - PNG_FUNCTION(PNG_EXPORT_TYPE(type),(PNGAPI name),PNGARG(args), \ - extern attributes) -#endif - -/* ANSI-C (C90) does not permit a macro to be invoked with an empty argument, - * so make something non-empty to satisfy the requirement: - */ -#define PNG_EMPTY /*empty list*/ - -#define PNG_EXPORT(ordinal, type, name, args)\ - PNG_EXPORTA(ordinal, type, name, args, PNG_EMPTY) - -/* Use PNG_REMOVED to comment out a removed interface. */ -#ifndef PNG_REMOVED -# define PNG_REMOVED(ordinal, type, name, args, attributes) -#endif - -#ifndef PNG_CALLBACK -# define PNG_CALLBACK(type, name, args) type (PNGCBAPI name) PNGARG(args) -#endif - -/* Support for compiler specific function attributes. These are used - * so that where compiler support is available incorrect use of API - * functions in png.h will generate compiler warnings. - * - * Added at libpng-1.2.41. - */ - -#ifndef PNG_NO_PEDANTIC_WARNINGS -# ifndef PNG_PEDANTIC_WARNINGS_SUPPORTED -# define PNG_PEDANTIC_WARNINGS_SUPPORTED -# endif -#endif - -#ifdef PNG_PEDANTIC_WARNINGS_SUPPORTED - /* Support for compiler specific function attributes. These are used - * so that where compiler support is available incorrect use of API - * functions in png.h will generate compiler warnings. Added at libpng - * version 1.2.41. - */ -# if defined(__GNUC__) -# ifndef PNG_USE_RESULT -# define PNG_USE_RESULT __attribute__((__warn_unused_result__)) -# endif -# ifndef PNG_NORETURN -# define PNG_NORETURN __attribute__((__noreturn__)) -# endif -# ifndef PNG_ALLOCATED -# define PNG_ALLOCATED __attribute__((__malloc__)) -# endif -# ifndef PNG_DEPRECATED -# define PNG_DEPRECATED __attribute__((__deprecated__)) -# endif -# ifndef PNG_PRIVATE -# if 0 /* Doesn't work so we use deprecated instead*/ -# define PNG_PRIVATE \ - __attribute__((warning("This function is not exported by libpng."))) -# else -# define PNG_PRIVATE \ - __attribute__((__deprecated__)) -# endif -# endif -# endif /* __GNUC__ */ - -# if defined(_MSC_VER) && (_MSC_VER >= 1300) -# ifndef PNG_USE_RESULT -# define PNG_USE_RESULT /* not supported */ -# endif -# ifndef PNG_NORETURN -# define PNG_NORETURN __declspec(noreturn) -# endif -# ifndef PNG_ALLOCATED -# if (_MSC_VER >= 1400) -# define PNG_ALLOCATED __declspec(restrict) -# endif -# endif -# ifndef PNG_DEPRECATED -# define PNG_DEPRECATED __declspec(deprecated) -# endif -# ifndef PNG_PRIVATE -# define PNG_PRIVATE __declspec(deprecated) -# endif -# endif /* _MSC_VER */ -#endif /* PNG_PEDANTIC_WARNINGS */ - -#ifndef PNG_DEPRECATED -# define PNG_DEPRECATED /* Use of this function is deprecated */ -#endif -#ifndef PNG_USE_RESULT -# define PNG_USE_RESULT /* The result of this function must be checked */ -#endif -#ifndef PNG_NORETURN -# define PNG_NORETURN /* This function does not return */ -#endif -#ifndef PNG_ALLOCATED -# define PNG_ALLOCATED /* The result of the function is new memory */ -#endif -#ifndef PNG_PRIVATE -# define PNG_PRIVATE /* This is a private libpng function */ -#endif -#ifndef PNG_FP_EXPORT /* A floating point API. */ -# ifdef PNG_FLOATING_POINT_SUPPORTED -# define PNG_FP_EXPORT(ordinal, type, name, args)\ - PNG_EXPORT(ordinal, type, name, args) -# else /* No floating point APIs */ -# define PNG_FP_EXPORT(ordinal, type, name, args) -# endif -#endif -#ifndef PNG_FIXED_EXPORT /* A fixed point API. */ -# ifdef PNG_FIXED_POINT_SUPPORTED -# define PNG_FIXED_EXPORT(ordinal, type, name, args)\ - PNG_EXPORT(ordinal, type, name, args) -# else /* No fixed point APIs */ -# define PNG_FIXED_EXPORT(ordinal, type, name, args) -# endif -#endif - -/* The following uses const char * instead of char * for error - * and warning message functions, so some compilers won't complain. - * If you do not want to use const, define PNG_NO_CONST here. - * - * This should not change how the APIs are called, so it can be done - * on a per-file basis in the application. - */ -#ifndef PNG_CONST -# ifndef PNG_NO_CONST -# define PNG_CONST const -# else -# define PNG_CONST -# endif -#endif - -/* Some typedefs to get us started. These should be safe on most of the - * common platforms. The typedefs should be at least as large as the - * numbers suggest (a png_uint_32 must be at least 32 bits long), but they - * don't have to be exactly that size. Some compilers dislike passing - * unsigned shorts as function parameters, so you may be better off using - * unsigned int for png_uint_16. - */ - -#if defined(INT_MAX) && (INT_MAX > 0x7ffffffeL) -typedef unsigned int png_uint_32; -typedef int png_int_32; -#else -typedef unsigned long png_uint_32; -typedef long png_int_32; -#endif -typedef unsigned short png_uint_16; -typedef short png_int_16; -typedef unsigned char png_byte; - -#ifdef PNG_NO_SIZE_T -typedef unsigned int png_size_t; -#else -typedef size_t png_size_t; -#endif -#define png_sizeof(x) (sizeof (x)) - -/* The following is needed for medium model support. It cannot be in the - * pngpriv.h header. Needs modification for other compilers besides - * MSC. Model independent support declares all arrays and pointers to be - * large using the far keyword. The zlib version used must also support - * model independent data. As of version zlib 1.0.4, the necessary changes - * have been made in zlib. The USE_FAR_KEYWORD define triggers other - * changes that are needed. (Tim Wegner) - */ - -/* Separate compiler dependencies (problem here is that zlib.h always - * defines FAR. (SJT) - */ -#ifdef __BORLANDC__ -# if defined(__LARGE__) || defined(__HUGE__) || defined(__COMPACT__) -# define LDATA 1 -# else -# define LDATA 0 -# endif - /* GRR: why is Cygwin in here? Cygwin is not Borland C... */ -# if !defined(__WIN32__) && !defined(__FLAT__) && !defined(__CYGWIN__) -# define PNG_MAX_MALLOC_64K /* only used in build */ -# if (LDATA != 1) -# ifndef FAR -# define FAR __far -# endif -# define USE_FAR_KEYWORD -# endif /* LDATA != 1 */ - /* Possibly useful for moving data out of default segment. - * Uncomment it if you want. Could also define FARDATA as - * const if your compiler supports it. (SJT) -# define FARDATA FAR - */ -# endif /* __WIN32__, __FLAT__, __CYGWIN__ */ -#endif /* __BORLANDC__ */ - - -/* Suggest testing for specific compiler first before testing for - * FAR. The Watcom compiler defines both __MEDIUM__ and M_I86MM, - * making reliance oncertain keywords suspect. (SJT) - */ - -/* MSC Medium model */ -#ifdef FAR -# ifdef M_I86MM -# define USE_FAR_KEYWORD -# define FARDATA FAR -# include -# endif -#endif - -/* SJT: default case */ -#ifndef FAR -# define FAR -#endif - -/* At this point FAR is always defined */ -#ifndef FARDATA -# define FARDATA -#endif - -/* Typedef for floating-point numbers that are converted - * to fixed-point with a multiple of 100,000, e.g., gamma - */ -typedef png_int_32 png_fixed_point; - -/* Add typedefs for pointers */ -typedef void FAR * png_voidp; -typedef PNG_CONST void FAR * png_const_voidp; -typedef png_byte FAR * png_bytep; -typedef PNG_CONST png_byte FAR * png_const_bytep; -typedef png_uint_32 FAR * png_uint_32p; -typedef PNG_CONST png_uint_32 FAR * png_const_uint_32p; -typedef png_int_32 FAR * png_int_32p; -typedef PNG_CONST png_int_32 FAR * png_const_int_32p; -typedef png_uint_16 FAR * png_uint_16p; -typedef PNG_CONST png_uint_16 FAR * png_const_uint_16p; -typedef png_int_16 FAR * png_int_16p; -typedef PNG_CONST png_int_16 FAR * png_const_int_16p; -typedef char FAR * png_charp; -typedef PNG_CONST char FAR * png_const_charp; -typedef png_fixed_point FAR * png_fixed_point_p; -typedef PNG_CONST png_fixed_point FAR * png_const_fixed_point_p; -typedef png_size_t FAR * png_size_tp; -typedef PNG_CONST png_size_t FAR * png_const_size_tp; - -#ifdef PNG_STDIO_SUPPORTED -typedef FILE * png_FILE_p; -#endif - -#ifdef PNG_FLOATING_POINT_SUPPORTED -typedef double FAR * png_doublep; -typedef PNG_CONST double FAR * png_const_doublep; -#endif - -/* Pointers to pointers; i.e. arrays */ -typedef png_byte FAR * FAR * png_bytepp; -typedef png_uint_32 FAR * FAR * png_uint_32pp; -typedef png_int_32 FAR * FAR * png_int_32pp; -typedef png_uint_16 FAR * FAR * png_uint_16pp; -typedef png_int_16 FAR * FAR * png_int_16pp; -typedef PNG_CONST char FAR * FAR * png_const_charpp; -typedef char FAR * FAR * png_charpp; -typedef png_fixed_point FAR * FAR * png_fixed_point_pp; -#ifdef PNG_FLOATING_POINT_SUPPORTED -typedef double FAR * FAR * png_doublepp; -#endif - -/* Pointers to pointers to pointers; i.e., pointer to array */ -typedef char FAR * FAR * FAR * png_charppp; - -/* png_alloc_size_t is guaranteed to be no smaller than png_size_t, - * and no smaller than png_uint_32. Casts from png_size_t or png_uint_32 - * to png_alloc_size_t are not necessary; in fact, it is recommended - * not to use them at all so that the compiler can complain when something - * turns out to be problematic. - * Casts in the other direction (from png_alloc_size_t to png_size_t or - * png_uint_32) should be explicitly applied; however, we do not expect - * to encounter practical situations that require such conversions. - */ -#if defined(__TURBOC__) && !defined(__FLAT__) - typedef unsigned long png_alloc_size_t; -#else -# if defined(_MSC_VER) && defined(MAXSEG_64K) - typedef unsigned long png_alloc_size_t; -# else - /* This is an attempt to detect an old Windows system where (int) is - * actually 16 bits, in that case png_malloc must have an argument with a - * bigger size to accomodate the requirements of the library. - */ -# if (defined(_Windows) || defined(_WINDOWS) || defined(_WINDOWS_)) && \ - (!defined(INT_MAX) || INT_MAX <= 0x7ffffffeL) - typedef DWORD png_alloc_size_t; -# else - typedef png_size_t png_alloc_size_t; -# endif -# endif -#endif - -#endif /* PNGCONF_H */ diff --git a/extern/libpng/include/pnglibconf.h b/extern/libpng/include/pnglibconf.h deleted file mode 100644 index 6facf39aab..0000000000 --- a/extern/libpng/include/pnglibconf.h +++ /dev/null @@ -1,186 +0,0 @@ - -/* libpng STANDARD API DEFINITION */ - -/* pnglibconf.h - library build configuration */ - -/* Libpng 1.5.10 - March 29, 2012 */ - -/* Copyright (c) 1998-2012 Glenn Randers-Pehrson */ - -/* This code is released under the libpng license. */ -/* For conditions of distribution and use, see the disclaimer */ -/* and license in png.h */ - -/* pnglibconf.h */ -/* Derived from: scripts/pnglibconf.dfa */ -/* If you edit this file by hand you must obey the rules expressed in */ -/* pnglibconf.dfa with respect to the dependencies between the following */ -/* symbols. It is much better to generate a new file using */ -/* scripts/libpngconf.mak */ - -#ifndef PNGLCONF_H -#define PNGLCONF_H -/* settings */ -#define PNG_API_RULE 0 -#define PNG_CALLOC_SUPPORTED -#define PNG_COST_SHIFT 3 -#define PNG_DEFAULT_READ_MACROS 1 -#define PNG_GAMMA_THRESHOLD_FIXED 5000 -#define PNG_MAX_GAMMA_8 11 -#define PNG_QUANTIZE_BLUE_BITS 5 -#define PNG_QUANTIZE_GREEN_BITS 5 -#define PNG_QUANTIZE_RED_BITS 5 -#define PNG_sCAL_PRECISION 5 -#define PNG_WEIGHT_SHIFT 8 -#define PNG_ZBUF_SIZE 8192 -/* end of settings */ -/* options */ -#define PNG_16BIT_SUPPORTED -#define PNG_ALIGN_MEMORY_SUPPORTED -#define PNG_BENIGN_ERRORS_SUPPORTED -#define PNG_bKGD_SUPPORTED -#define PNG_BUILD_GRAYSCALE_PALETTE_SUPPORTED -#define PNG_CHECK_cHRM_SUPPORTED -#define PNG_CHECK_FOR_INVALID_INDEX_SUPPORTED -#define PNG_cHRM_SUPPORTED -#define PNG_CONSOLE_IO_SUPPORTED -#define PNG_CONVERT_tIME_SUPPORTED -#define PNG_EASY_ACCESS_SUPPORTED -/*#undef PNG_ERROR_NUMBERS_SUPPORTED*/ -#define PNG_ERROR_TEXT_SUPPORTED -#define PNG_FIXED_POINT_SUPPORTED -#define PNG_FLOATING_ARITHMETIC_SUPPORTED -#define PNG_FLOATING_POINT_SUPPORTED -#define PNG_gAMA_SUPPORTED -#define PNG_HANDLE_AS_UNKNOWN_SUPPORTED -#define PNG_hIST_SUPPORTED -#define PNG_iCCP_SUPPORTED -#define PNG_INCH_CONVERSIONS_SUPPORTED -#define PNG_INFO_IMAGE_SUPPORTED -#define PNG_IO_STATE_SUPPORTED -#define PNG_iTXt_SUPPORTED -#define PNG_MNG_FEATURES_SUPPORTED -#define PNG_oFFs_SUPPORTED -#define PNG_pCAL_SUPPORTED -#define PNG_pHYs_SUPPORTED -#define PNG_POINTER_INDEXING_SUPPORTED -#define PNG_PROGRESSIVE_READ_SUPPORTED -#define PNG_READ_16BIT_SUPPORTED -#define PNG_READ_ALPHA_MODE_SUPPORTED -#define PNG_READ_ANCILLARY_CHUNKS_SUPPORTED -#define PNG_READ_BACKGROUND_SUPPORTED -#define PNG_READ_BGR_SUPPORTED -#define PNG_READ_bKGD_SUPPORTED -#define PNG_READ_CHECK_FOR_INVALID_INDEX_SUPPORTED -#define PNG_READ_cHRM_SUPPORTED -#define PNG_READ_COMPOSITE_NODIV_SUPPORTED -#define PNG_READ_COMPRESSED_TEXT_SUPPORTED -#define PNG_READ_EXPAND_16_SUPPORTED -#define PNG_READ_EXPAND_SUPPORTED -#define PNG_READ_FILLER_SUPPORTED -#define PNG_READ_gAMA_SUPPORTED -#define PNG_READ_GAMMA_SUPPORTED -#define PNG_READ_GRAY_TO_RGB_SUPPORTED -#define PNG_READ_hIST_SUPPORTED -#define PNG_READ_iCCP_SUPPORTED -#define PNG_READ_INTERLACING_SUPPORTED -#define PNG_READ_INT_FUNCTIONS_SUPPORTED -#define PNG_READ_INVERT_ALPHA_SUPPORTED -#define PNG_READ_INVERT_SUPPORTED -#define PNG_READ_iTXt_SUPPORTED -#define PNG_READ_oFFs_SUPPORTED -#define PNG_READ_OPT_PLTE_SUPPORTED -#define PNG_READ_PACK_SUPPORTED -#define PNG_READ_PACKSWAP_SUPPORTED -#define PNG_READ_pCAL_SUPPORTED -#define PNG_READ_pHYs_SUPPORTED -#define PNG_READ_QUANTIZE_SUPPORTED -#define PNG_READ_RGB_TO_GRAY_SUPPORTED -#define PNG_READ_sBIT_SUPPORTED -#define PNG_READ_SCALE_16_TO_8_SUPPORTED -#define PNG_READ_sCAL_SUPPORTED -#define PNG_READ_SHIFT_SUPPORTED -#define PNG_READ_sPLT_SUPPORTED -#define PNG_READ_sRGB_SUPPORTED -#define PNG_READ_STRIP_16_TO_8_SUPPORTED -#define PNG_READ_STRIP_ALPHA_SUPPORTED -#define PNG_READ_SUPPORTED -#define PNG_READ_SWAP_ALPHA_SUPPORTED -#define PNG_READ_SWAP_SUPPORTED -#define PNG_READ_tEXt_SUPPORTED -#define PNG_READ_TEXT_SUPPORTED -#define PNG_READ_tIME_SUPPORTED -#define PNG_READ_TRANSFORMS_SUPPORTED -#define PNG_READ_tRNS_SUPPORTED -#define PNG_READ_UNKNOWN_CHUNKS_SUPPORTED -#define PNG_READ_USER_CHUNKS_SUPPORTED -#define PNG_READ_USER_TRANSFORM_SUPPORTED -#define PNG_READ_zTXt_SUPPORTED -#define PNG_SAVE_INT_32_SUPPORTED -#define PNG_sBIT_SUPPORTED -#define PNG_sCAL_SUPPORTED -#define PNG_SEQUENTIAL_READ_SUPPORTED -#define PNG_SET_CHUNK_CACHE_LIMIT_SUPPORTED -#define PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED -#define PNG_SETJMP_SUPPORTED -#define PNG_SET_USER_LIMITS_SUPPORTED -#define PNG_sPLT_SUPPORTED -#define PNG_sRGB_SUPPORTED -#define PNG_STDIO_SUPPORTED -#define PNG_tEXt_SUPPORTED -#define PNG_TEXT_SUPPORTED -#define PNG_TIME_RFC1123_SUPPORTED -#define PNG_tIME_SUPPORTED -#define PNG_tRNS_SUPPORTED -#define PNG_UNKNOWN_CHUNKS_SUPPORTED -#define PNG_USER_CHUNKS_SUPPORTED -#define PNG_USER_LIMITS_SUPPORTED -#define PNG_USER_MEM_SUPPORTED -#define PNG_USER_TRANSFORM_INFO_SUPPORTED -#define PNG_USER_TRANSFORM_PTR_SUPPORTED -#define PNG_WARNINGS_SUPPORTED -#define PNG_WRITE_16BIT_SUPPORTED -#define PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED -#define PNG_WRITE_BGR_SUPPORTED -#define PNG_WRITE_bKGD_SUPPORTED -#define PNG_WRITE_CHECK_FOR_INVALID_INDEX_SUPPORTED -#define PNG_WRITE_cHRM_SUPPORTED -#define PNG_WRITE_COMPRESSED_TEXT_SUPPORTED -#define PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED -#define PNG_WRITE_FILLER_SUPPORTED -#define PNG_WRITE_FILTER_SUPPORTED -#define PNG_WRITE_FLUSH_SUPPORTED -#define PNG_WRITE_gAMA_SUPPORTED -#define PNG_WRITE_hIST_SUPPORTED -#define PNG_WRITE_iCCP_SUPPORTED -#define PNG_WRITE_INTERLACING_SUPPORTED -#define PNG_WRITE_INT_FUNCTIONS_SUPPORTED -#define PNG_WRITE_INVERT_ALPHA_SUPPORTED -#define PNG_WRITE_INVERT_SUPPORTED -#define PNG_WRITE_iTXt_SUPPORTED -#define PNG_WRITE_oFFs_SUPPORTED -#define PNG_WRITE_OPTIMIZE_CMF_SUPPORTED -#define PNG_WRITE_PACK_SUPPORTED -#define PNG_WRITE_PACKSWAP_SUPPORTED -#define PNG_WRITE_pCAL_SUPPORTED -#define PNG_WRITE_pHYs_SUPPORTED -#define PNG_WRITE_sBIT_SUPPORTED -#define PNG_WRITE_sCAL_SUPPORTED -#define PNG_WRITE_SHIFT_SUPPORTED -#define PNG_WRITE_sPLT_SUPPORTED -#define PNG_WRITE_sRGB_SUPPORTED -#define PNG_WRITE_SUPPORTED -#define PNG_WRITE_SWAP_ALPHA_SUPPORTED -#define PNG_WRITE_SWAP_SUPPORTED -#define PNG_WRITE_tEXt_SUPPORTED -#define PNG_WRITE_TEXT_SUPPORTED -#define PNG_WRITE_tIME_SUPPORTED -#define PNG_WRITE_TRANSFORMS_SUPPORTED -#define PNG_WRITE_tRNS_SUPPORTED -#define PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED -#define PNG_WRITE_USER_TRANSFORM_SUPPORTED -#define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED -#define PNG_WRITE_zTXt_SUPPORTED -#define PNG_zTXt_SUPPORTED -/* end of options */ -#endif /* PNGLCONF_H */ diff --git a/extern/libpng/include/pngmem.c b/extern/libpng/include/pngmem.c deleted file mode 100644 index bf5ff037da..0000000000 --- a/extern/libpng/include/pngmem.c +++ /dev/null @@ -1,667 +0,0 @@ - -/* pngmem.c - stub functions for memory allocation - * - * Last changed in libpng 1.5.7 [December 15, 2011] - * Copyright (c) 1998-2011 Glenn Randers-Pehrson - * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) - * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) - * - * This code is released under the libpng license. - * For conditions of distribution and use, see the disclaimer - * and license in png.h - * - * This file provides a location for all memory allocation. Users who - * need special memory handling are expected to supply replacement - * functions for png_malloc() and png_free(), and to use - * png_create_read_struct_2() and png_create_write_struct_2() to - * identify the replacement functions. - */ - -#include "pngpriv.h" - -#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) - -/* Borland DOS special memory handler */ -#if defined(__TURBOC__) && !defined(_Windows) && !defined(__FLAT__) -/* If you change this, be sure to change the one in png.h also */ - -/* Allocate memory for a png_struct. The malloc and memset can be replaced - by a single call to calloc() if this is thought to improve performance. */ -PNG_FUNCTION(png_voidp /* PRIVATE */, -png_create_struct,(int type),PNG_ALLOCATED) -{ -# ifdef PNG_USER_MEM_SUPPORTED - return (png_create_struct_2(type, NULL, NULL)); -} - -/* Alternate version of png_create_struct, for use with user-defined malloc. */ -PNG_FUNCTION(png_voidp /* PRIVATE */, -png_create_struct_2,(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr), - PNG_ALLOCATED) -{ -# endif /* PNG_USER_MEM_SUPPORTED */ - png_size_t size; - png_voidp struct_ptr; - - if (type == PNG_STRUCT_INFO) - size = png_sizeof(png_info); - - else if (type == PNG_STRUCT_PNG) - size = png_sizeof(png_struct); - - else - return (png_get_copyright(NULL)); - -# ifdef PNG_USER_MEM_SUPPORTED - if (malloc_fn != NULL) - { - png_struct dummy_struct; - memset(&dummy_struct, 0, sizeof dummy_struct); - dummy_struct.mem_ptr=mem_ptr; - struct_ptr = (*(malloc_fn))(&dummy_struct, (png_alloc_size_t)size); - } - - else -# endif /* PNG_USER_MEM_SUPPORTED */ - struct_ptr = (png_voidp)farmalloc(size); - if (struct_ptr != NULL) - png_memset(struct_ptr, 0, size); - - return (struct_ptr); -} - -/* Free memory allocated by a png_create_struct() call */ -void /* PRIVATE */ -png_destroy_struct(png_voidp struct_ptr) -{ -# ifdef PNG_USER_MEM_SUPPORTED - png_destroy_struct_2(struct_ptr, NULL, NULL); -} - -/* Free memory allocated by a png_create_struct() call */ -void /* PRIVATE */ -png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn, - png_voidp mem_ptr) -{ -# endif - if (struct_ptr != NULL) - { -# ifdef PNG_USER_MEM_SUPPORTED - if (free_fn != NULL) - { - png_struct dummy_struct; - memset(&dummy_struct, 0, sizeof dummy_struct); - dummy_struct.mem_ptr=mem_ptr; - (*(free_fn))(&dummy_struct, struct_ptr); - return; - } - -# endif /* PNG_USER_MEM_SUPPORTED */ - farfree (struct_ptr); - } -} - -/* Allocate memory. For reasonable files, size should never exceed - * 64K. However, zlib may allocate more then 64K if you don't tell - * it not to. See zconf.h and png.h for more information. zlib does - * need to allocate exactly 64K, so whatever you call here must - * have the ability to do that. - * - * Borland seems to have a problem in DOS mode for exactly 64K. - * It gives you a segment with an offset of 8 (perhaps to store its - * memory stuff). zlib doesn't like this at all, so we have to - * detect and deal with it. This code should not be needed in - * Windows or OS/2 modes, and only in 16 bit mode. This code has - * been updated by Alexander Lehmann for version 0.89 to waste less - * memory. - * - * Note that we can't use png_size_t for the "size" declaration, - * since on some systems a png_size_t is a 16-bit quantity, and as a - * result, we would be truncating potentially larger memory requests - * (which should cause a fatal error) and introducing major problems. - */ -PNG_FUNCTION(png_voidp,PNGAPI -png_calloc,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) -{ - png_voidp ret; - - ret = (png_malloc(png_ptr, size)); - - if (ret != NULL) - png_memset(ret,0,(png_size_t)size); - - return (ret); -} - -PNG_FUNCTION(png_voidp,PNGAPI -png_malloc,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) -{ - png_voidp ret; - - if (png_ptr == NULL || size == 0) - return (NULL); - -# ifdef PNG_USER_MEM_SUPPORTED - if (png_ptr->malloc_fn != NULL) - ret = ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, size)); - - else - ret = (png_malloc_default(png_ptr, size)); - - if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) - png_error(png_ptr, "Out of memory"); - - return (ret); -} - -PNG_FUNCTION(png_voidp,PNGAPI -png_malloc_default,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) -{ - png_voidp ret; -# endif /* PNG_USER_MEM_SUPPORTED */ - - if (png_ptr == NULL || size == 0) - return (NULL); - -# ifdef PNG_MAX_MALLOC_64K - if (size > (png_uint_32)65536L) - { - png_warning(png_ptr, "Cannot Allocate > 64K"); - ret = NULL; - } - - else -# endif - - if (size != (size_t)size) - ret = NULL; - - else if (size == (png_uint_32)65536L) - { - if (png_ptr->offset_table == NULL) - { - /* Try to see if we need to do any of this fancy stuff */ - ret = farmalloc(size); - if (ret == NULL || ((png_size_t)ret & 0xffff)) - { - int num_blocks; - png_uint_32 total_size; - png_bytep table; - int i, mem_level, window_bits; - png_byte huge * hptr; - int window_bits - - if (ret != NULL) - { - farfree(ret); - ret = NULL; - } - - window_bits = - png_ptr->zlib_window_bits >= png_ptr->zlib_text_window_bits ? - png_ptr->zlib_window_bits : png_ptr->zlib_text_window_bits; - - if (window_bits > 14) - num_blocks = (int)(1 << (window_bits - 14)); - - else - num_blocks = 1; - - mem_level = - png_ptr->zlib_mem_level >= png_ptr->zlib_text_mem_level ? - png_ptr->zlib_mem_level : png_ptr->zlib_text_mem_level; - - if (mem_level >= 7) - num_blocks += (int)(1 << (mem_level - 7)); - - else - num_blocks++; - - total_size = ((png_uint_32)65536L) * (png_uint_32)num_blocks+16; - - table = farmalloc(total_size); - - if (table == NULL) - { -# ifndef PNG_USER_MEM_SUPPORTED - if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) - png_error(png_ptr, "Out Of Memory"); /* Note "O", "M" */ - - else - png_warning(png_ptr, "Out Of Memory"); -# endif - return (NULL); - } - - if ((png_size_t)table & 0xfff0) - { -# ifndef PNG_USER_MEM_SUPPORTED - if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) - png_error(png_ptr, - "Farmalloc didn't return normalized pointer"); - - else - png_warning(png_ptr, - "Farmalloc didn't return normalized pointer"); -# endif - return (NULL); - } - - png_ptr->offset_table = table; - png_ptr->offset_table_ptr = farmalloc(num_blocks * - png_sizeof(png_bytep)); - - if (png_ptr->offset_table_ptr == NULL) - { -# ifndef PNG_USER_MEM_SUPPORTED - if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) - png_error(png_ptr, "Out Of memory"); /* Note "O", "m" */ - - else - png_warning(png_ptr, "Out Of memory"); -# endif - return (NULL); - } - - hptr = (png_byte huge *)table; - if ((png_size_t)hptr & 0xf) - { - hptr = (png_byte huge *)((long)(hptr) & 0xfffffff0L); - hptr = hptr + 16L; /* "hptr += 16L" fails on Turbo C++ 3.0 */ - } - - for (i = 0; i < num_blocks; i++) - { - png_ptr->offset_table_ptr[i] = (png_bytep)hptr; - hptr = hptr + (png_uint_32)65536L; /* "+=" fails on TC++3.0 */ - } - - png_ptr->offset_table_number = num_blocks; - png_ptr->offset_table_count = 0; - png_ptr->offset_table_count_free = 0; - } - } - - if (png_ptr->offset_table_count >= png_ptr->offset_table_number) - { -# ifndef PNG_USER_MEM_SUPPORTED - if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) - png_error(png_ptr, "Out of Memory"); /* Note "O" and "M" */ - - else - png_warning(png_ptr, "Out of Memory"); -# endif - return (NULL); - } - - ret = png_ptr->offset_table_ptr[png_ptr->offset_table_count++]; - } - - else - ret = farmalloc(size); - -# ifndef PNG_USER_MEM_SUPPORTED - if (ret == NULL) - { - if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) - png_error(png_ptr, "Out of memory"); /* Note "o" and "m" */ - - else - png_warning(png_ptr, "Out of memory"); /* Note "o" and "m" */ - } -# endif - - return (ret); -} - -/* Free a pointer allocated by png_malloc(). In the default - * configuration, png_ptr is not used, but is passed in case it - * is needed. If ptr is NULL, return without taking any action. - */ -void PNGAPI -png_free(png_structp png_ptr, png_voidp ptr) -{ - if (png_ptr == NULL || ptr == NULL) - return; - -# ifdef PNG_USER_MEM_SUPPORTED - if (png_ptr->free_fn != NULL) - { - (*(png_ptr->free_fn))(png_ptr, ptr); - return; - } - - else - png_free_default(png_ptr, ptr); -} - -void PNGAPI -png_free_default(png_structp png_ptr, png_voidp ptr) -{ -# endif /* PNG_USER_MEM_SUPPORTED */ - - if (png_ptr == NULL || ptr == NULL) - return; - - if (png_ptr->offset_table != NULL) - { - int i; - - for (i = 0; i < png_ptr->offset_table_count; i++) - { - if (ptr == png_ptr->offset_table_ptr[i]) - { - ptr = NULL; - png_ptr->offset_table_count_free++; - break; - } - } - if (png_ptr->offset_table_count_free == png_ptr->offset_table_count) - { - farfree(png_ptr->offset_table); - farfree(png_ptr->offset_table_ptr); - png_ptr->offset_table = NULL; - png_ptr->offset_table_ptr = NULL; - } - } - - if (ptr != NULL) - farfree(ptr); -} - -#else /* Not the Borland DOS special memory handler */ - -/* Allocate memory for a png_struct or a png_info. The malloc and - memset can be replaced by a single call to calloc() if this is thought - to improve performance noticably. */ -PNG_FUNCTION(png_voidp /* PRIVATE */, -png_create_struct,(int type),PNG_ALLOCATED) -{ -# ifdef PNG_USER_MEM_SUPPORTED - return (png_create_struct_2(type, NULL, NULL)); -} - -/* Allocate memory for a png_struct or a png_info. The malloc and - memset can be replaced by a single call to calloc() if this is thought - to improve performance noticably. */ -PNG_FUNCTION(png_voidp /* PRIVATE */, -png_create_struct_2,(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr), - PNG_ALLOCATED) -{ -# endif /* PNG_USER_MEM_SUPPORTED */ - png_size_t size; - png_voidp struct_ptr; - - if (type == PNG_STRUCT_INFO) - size = png_sizeof(png_info); - - else if (type == PNG_STRUCT_PNG) - size = png_sizeof(png_struct); - - else - return (NULL); - -# ifdef PNG_USER_MEM_SUPPORTED - if (malloc_fn != NULL) - { - png_struct dummy_struct; - png_structp png_ptr = &dummy_struct; - png_ptr->mem_ptr=mem_ptr; - struct_ptr = (*(malloc_fn))(png_ptr, size); - - if (struct_ptr != NULL) - png_memset(struct_ptr, 0, size); - - return (struct_ptr); - } -# endif /* PNG_USER_MEM_SUPPORTED */ - -# if defined(__TURBOC__) && !defined(__FLAT__) - struct_ptr = (png_voidp)farmalloc(size); -# else -# if defined(_MSC_VER) && defined(MAXSEG_64K) - struct_ptr = (png_voidp)halloc(size, 1); -# else - struct_ptr = (png_voidp)malloc(size); -# endif -# endif - - if (struct_ptr != NULL) - png_memset(struct_ptr, 0, size); - - return (struct_ptr); -} - - -/* Free memory allocated by a png_create_struct() call */ -void /* PRIVATE */ -png_destroy_struct(png_voidp struct_ptr) -{ -# ifdef PNG_USER_MEM_SUPPORTED - png_destroy_struct_2(struct_ptr, NULL, NULL); -} - -/* Free memory allocated by a png_create_struct() call */ -void /* PRIVATE */ -png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn, - png_voidp mem_ptr) -{ -# endif /* PNG_USER_MEM_SUPPORTED */ - if (struct_ptr != NULL) - { -# ifdef PNG_USER_MEM_SUPPORTED - if (free_fn != NULL) - { - png_struct dummy_struct; - png_structp png_ptr = &dummy_struct; - png_ptr->mem_ptr=mem_ptr; - (*(free_fn))(png_ptr, struct_ptr); - return; - } -# endif /* PNG_USER_MEM_SUPPORTED */ -# if defined(__TURBOC__) && !defined(__FLAT__) - farfree(struct_ptr); - -# else -# if defined(_MSC_VER) && defined(MAXSEG_64K) - hfree(struct_ptr); - -# else - free(struct_ptr); - -# endif -# endif - } -} - -/* Allocate memory. For reasonable files, size should never exceed - * 64K. However, zlib may allocate more then 64K if you don't tell - * it not to. See zconf.h and png.h for more information. zlib does - * need to allocate exactly 64K, so whatever you call here must - * have the ability to do that. - */ - -PNG_FUNCTION(png_voidp,PNGAPI -png_calloc,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) -{ - png_voidp ret; - - ret = (png_malloc(png_ptr, size)); - - if (ret != NULL) - png_memset(ret,0,(png_size_t)size); - - return (ret); -} - -PNG_FUNCTION(png_voidp,PNGAPI -png_malloc,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) -{ - png_voidp ret; - -# ifdef PNG_USER_MEM_SUPPORTED - if (png_ptr == NULL || size == 0) - return (NULL); - - if (png_ptr->malloc_fn != NULL) - ret = ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, (png_size_t)size)); - - else - ret = (png_malloc_default(png_ptr, size)); - - if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) - png_error(png_ptr, "Out of Memory"); - - return (ret); -} - -PNG_FUNCTION(png_voidp,PNGAPI -png_malloc_default,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) -{ - png_voidp ret; -# endif /* PNG_USER_MEM_SUPPORTED */ - - if (png_ptr == NULL || size == 0) - return (NULL); - -# ifdef PNG_MAX_MALLOC_64K - if (size > (png_uint_32)65536L) - { -# ifndef PNG_USER_MEM_SUPPORTED - if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) - png_error(png_ptr, "Cannot Allocate > 64K"); - - else -# endif - return NULL; - } -# endif - - /* Check for overflow */ -# if defined(__TURBOC__) && !defined(__FLAT__) - - if (size != (unsigned long)size) - ret = NULL; - - else - ret = farmalloc(size); - -# else -# if defined(_MSC_VER) && defined(MAXSEG_64K) - if (size != (unsigned long)size) - ret = NULL; - - else - ret = halloc(size, 1); - -# else - if (size != (size_t)size) - ret = NULL; - - else - ret = malloc((size_t)size); -# endif -# endif - -# ifndef PNG_USER_MEM_SUPPORTED - if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) - png_error(png_ptr, "Out of Memory"); -# endif - - return (ret); -} - -/* Free a pointer allocated by png_malloc(). If ptr is NULL, return - * without taking any action. - */ -void PNGAPI -png_free(png_structp png_ptr, png_voidp ptr) -{ - if (png_ptr == NULL || ptr == NULL) - return; - -# ifdef PNG_USER_MEM_SUPPORTED - if (png_ptr->free_fn != NULL) - { - (*(png_ptr->free_fn))(png_ptr, ptr); - return; - } - - else - png_free_default(png_ptr, ptr); -} - -void PNGAPI -png_free_default(png_structp png_ptr, png_voidp ptr) -{ - if (png_ptr == NULL || ptr == NULL) - return; - -# endif /* PNG_USER_MEM_SUPPORTED */ - -# if defined(__TURBOC__) && !defined(__FLAT__) - farfree(ptr); - -# else -# if defined(_MSC_VER) && defined(MAXSEG_64K) - hfree(ptr); - -# else - free(ptr); - -# endif -# endif -} -#endif /* Not Borland DOS special memory handler */ - -/* This function was added at libpng version 1.2.3. The png_malloc_warn() - * function will set up png_malloc() to issue a png_warning and return NULL - * instead of issuing a png_error, if it fails to allocate the requested - * memory. - */ -PNG_FUNCTION(png_voidp,PNGAPI -png_malloc_warn,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) -{ - png_voidp ptr; - png_uint_32 save_flags; - if (png_ptr == NULL) - return (NULL); - - save_flags = png_ptr->flags; - png_ptr->flags|=PNG_FLAG_MALLOC_NULL_MEM_OK; - ptr = (png_voidp)png_malloc((png_structp)png_ptr, size); - png_ptr->flags=save_flags; - return(ptr); -} - - -#ifdef PNG_USER_MEM_SUPPORTED -/* This function is called when the application wants to use another method - * of allocating and freeing memory. - */ -void PNGAPI -png_set_mem_fn(png_structp png_ptr, png_voidp mem_ptr, png_malloc_ptr - malloc_fn, png_free_ptr free_fn) -{ - if (png_ptr != NULL) - { - png_ptr->mem_ptr = mem_ptr; - png_ptr->malloc_fn = malloc_fn; - png_ptr->free_fn = free_fn; - } -} - -/* This function returns a pointer to the mem_ptr associated with the user - * functions. The application should free any memory associated with this - * pointer before png_write_destroy and png_read_destroy are called. - */ -png_voidp PNGAPI -png_get_mem_ptr(png_const_structp png_ptr) -{ - if (png_ptr == NULL) - return (NULL); - - return ((png_voidp)png_ptr->mem_ptr); -} -#endif /* PNG_USER_MEM_SUPPORTED */ -#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */ diff --git a/extern/libpng/include/pngpriv.h b/extern/libpng/include/pngpriv.h deleted file mode 100644 index e76a57975f..0000000000 --- a/extern/libpng/include/pngpriv.h +++ /dev/null @@ -1,1677 +0,0 @@ - -/* pngpriv.h - private declarations for use inside libpng - * - * For conditions of distribution and use, see copyright notice in png.h - * Copyright (c) 1998-2012 Glenn Randers-Pehrson - * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) - * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) - * - * Last changed in libpng 1.5.10 [March 29, 2012] - * - * This code is released under the libpng license. - * For conditions of distribution and use, see the disclaimer - * and license in png.h - */ - -/* The symbols declared in this file (including the functions declared - * as PNG_EXTERN) are PRIVATE. They are not part of the libpng public - * interface, and are not recommended for use by regular applications. - * Some of them may become public in the future; others may stay private, - * change in an incompatible way, or even disappear. - * Although the libpng users are not forbidden to include this header, - * they should be well aware of the issues that may arise from doing so. - */ - -#ifndef PNGPRIV_H -#define PNGPRIV_H - -/* Feature Test Macros. The following are defined here to ensure that correctly - * implemented libraries reveal the APIs libpng needs to build and hide those - * that are not needed and potentially damaging to the compilation. - * - * Feature Test Macros must be defined before any system header is included (see - * POSIX 1003.1 2.8.2 "POSIX Symbols." - * - * These macros only have an effect if the operating system supports either - * POSIX 1003.1 or C99, or both. On other operating systems (particularly - * Windows/Visual Studio) there is no effect; the OS specific tests below are - * still required (as of 2011-05-02.) - */ -#define _POSIX_SOURCE 1 /* Just the POSIX 1003.1 and C89 APIs */ - -/* This is required for the definition of abort(), used as a last ditch - * error handler when all else fails. - */ -#include - -/* This is used to find 'offsetof', used below for alignment tests. */ -#include - -#define PNGLIB_BUILD /*libpng is being built, not used*/ - -#ifdef PNG_USER_CONFIG -# include "pngusr.h" - /* These should have been defined in pngusr.h */ -# ifndef PNG_USER_PRIVATEBUILD -# define PNG_USER_PRIVATEBUILD "Custom libpng build" -# endif -# ifndef PNG_USER_DLLFNAME_POSTFIX -# define PNG_USER_DLLFNAME_POSTFIX "Cb" -# endif -#endif - -/* Is this a build of a DLL where compilation of the object modules requires - * different preprocessor settings to those required for a simple library? If - * so PNG_BUILD_DLL must be set. - * - * If libpng is used inside a DLL but that DLL does not export the libpng APIs - * PNG_BUILD_DLL must not be set. To avoid the code below kicking in build a - * static library of libpng then link the DLL against that. - */ -#ifndef PNG_BUILD_DLL -# ifdef DLL_EXPORT - /* This is set by libtool when files are compiled for a DLL; libtool - * always compiles twice, even on systems where it isn't necessary. Set - * PNG_BUILD_DLL in case it is necessary: - */ -# define PNG_BUILD_DLL -# else -# ifdef _WINDLL - /* This is set by the Microsoft Visual Studio IDE in projects that - * build a DLL. It can't easily be removed from those projects (it - * isn't visible in the Visual Studio UI) so it is a fairly reliable - * indication that PNG_IMPEXP needs to be set to the DLL export - * attributes. - */ -# define PNG_BUILD_DLL -# else -# ifdef __DLL__ - /* This is set by the Borland C system when compiling for a DLL - * (as above.) - */ -# define PNG_BUILD_DLL -# else - /* Add additional compiler cases here. */ -# endif -# endif -# endif -#endif /* Setting PNG_BUILD_DLL if required */ - -/* See pngconf.h for more details: the builder of the library may set this on - * the command line to the right thing for the specific compilation system or it - * may be automagically set above (at present we know of no system where it does - * need to be set on the command line.) - * - * PNG_IMPEXP must be set here when building the library to prevent pngconf.h - * setting it to the "import" setting for a DLL build. - */ -#ifndef PNG_IMPEXP -# ifdef PNG_BUILD_DLL -# define PNG_IMPEXP PNG_DLL_EXPORT -# else - /* Not building a DLL, or the DLL doesn't require specific export - * definitions. - */ -# define PNG_IMPEXP -# endif -#endif - -/* No warnings for private or deprecated functions in the build: */ -#ifndef PNG_DEPRECATED -# define PNG_DEPRECATED -#endif -#ifndef PNG_PRIVATE -# define PNG_PRIVATE -#endif - -#include "png.h" -#include "pnginfo.h" -#include "pngstruct.h" - -/* pngconf.h does not set PNG_DLL_EXPORT unless it is required, so: */ -#ifndef PNG_DLL_EXPORT -# define PNG_DLL_EXPORT -#endif - -/* SECURITY and SAFETY: - * - * By default libpng is built without any internal limits on image size, - * individual heap (png_malloc) allocations or the total amount of memory used. - * If PNG_SAFE_LIMITS_SUPPORTED is defined, however, the limits below are used - * (unless individually overridden). These limits are believed to be fairly - * safe, but builders of secure systems should verify the values against the - * real system capabilities. - */ - -#ifdef PNG_SAFE_LIMITS_SUPPORTED - /* 'safe' limits */ -# ifndef PNG_USER_WIDTH_MAX -# define PNG_USER_WIDTH_MAX 1000000 -# endif -# ifndef PNG_USER_HEIGHT_MAX -# define PNG_USER_HEIGHT_MAX 1000000 -# endif -# ifndef PNG_USER_CHUNK_CACHE_MAX -# define PNG_USER_CHUNK_CACHE_MAX 128 -# endif -# ifndef PNG_USER_CHUNK_MALLOC_MAX -# define PNG_USER_CHUNK_MALLOC_MAX 8000000 -# endif -#else - /* values for no limits */ -# ifndef PNG_USER_WIDTH_MAX -# define PNG_USER_WIDTH_MAX 0x7fffffff -# endif -# ifndef PNG_USER_HEIGHT_MAX -# define PNG_USER_HEIGHT_MAX 0x7fffffff -# endif -# ifndef PNG_USER_CHUNK_CACHE_MAX -# define PNG_USER_CHUNK_CACHE_MAX 0 -# endif -# ifndef PNG_USER_CHUNK_MALLOC_MAX -# define PNG_USER_CHUNK_MALLOC_MAX 0 -# endif -#endif - -/* This is used for 16 bit gamma tables - only the top level pointers are const, - * this could be changed: - */ -typedef PNG_CONST png_uint_16p FAR * png_const_uint_16pp; - -/* Added at libpng-1.2.9 */ -/* Moved to pngpriv.h at libpng-1.5.0 */ - -/* config.h is created by and PNG_CONFIGURE_LIBPNG is set by the "configure" - * script. We may need it here to get the correct configuration on things - * like limits. - */ -#ifdef PNG_CONFIGURE_LIBPNG -# ifdef HAVE_CONFIG_H -# include "config.h" -# endif -#endif - -/* Moved to pngpriv.h at libpng-1.5.0 */ -/* NOTE: some of these may have been used in external applications as - * these definitions were exposed in pngconf.h prior to 1.5. - */ - -/* If you are running on a machine where you cannot allocate more - * than 64K of memory at once, uncomment this. While libpng will not - * normally need that much memory in a chunk (unless you load up a very - * large file), zlib needs to know how big of a chunk it can use, and - * libpng thus makes sure to check any memory allocation to verify it - * will fit into memory. - * - * zlib provides 'MAXSEG_64K' which, if defined, indicates the - * same limit and pngconf.h (already included) sets the limit - * if certain operating systems are detected. - */ -#if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K) -# define PNG_MAX_MALLOC_64K -#endif - -#ifndef PNG_UNUSED -/* Unused formal parameter warnings are silenced using the following macro - * which is expected to have no bad effects on performance (optimizing - * compilers will probably remove it entirely). Note that if you replace - * it with something other than whitespace, you must include the terminating - * semicolon. - */ -# define PNG_UNUSED(param) (void)param; -#endif - -/* Just a little check that someone hasn't tried to define something - * contradictory. - */ -#if (PNG_ZBUF_SIZE > 65536L) && defined(PNG_MAX_MALLOC_64K) -# undef PNG_ZBUF_SIZE -# define PNG_ZBUF_SIZE 65536L -#endif - -/* PNG_STATIC is used to mark internal file scope functions if they need to be - * accessed for implementation tests (see the code in tests/?*). - */ -#ifndef PNG_STATIC -# define PNG_STATIC static -#endif - -/* C99 restrict is used where possible, to do this 'restrict' is defined as - * empty if we can't be sure it is supported. configure builds have already - * done this work. - */ -#ifdef PNG_CONFIGURE_LIBPNG -# define PNG_RESTRICT restrict -#else - /* Modern compilers support restrict, but assume not for anything not - * recognized here: - */ -# if defined __GNUC__ || defined _MSC_VER || defined __WATCOMC__ -# define PNG_RESTRICT restrict -# else -# define PNG_RESTRICT -# endif -#endif - -/* If warnings or errors are turned off the code is disabled or redirected here. - * From 1.5.4 functions have been added to allow very limited formatting of - * error and warning messages - this code will also be disabled here. - */ -#ifdef PNG_WARNINGS_SUPPORTED -# define PNG_WARNING_PARAMETERS(p) png_warning_parameters p; -#else -# define png_warning(s1,s2) ((void)(s1)) -# define png_chunk_warning(s1,s2) ((void)(s1)) -# define png_warning_parameter(p,number,string) ((void)0) -# define png_warning_parameter_unsigned(p,number,format,value) ((void)0) -# define png_warning_parameter_signed(p,number,format,value) ((void)0) -# define png_formatted_warning(pp,p,message) ((void)(pp)) -# define PNG_WARNING_PARAMETERS(p) -#endif -#ifndef PNG_ERROR_TEXT_SUPPORTED -# define png_error(s1,s2) png_err(s1) -# define png_chunk_error(s1,s2) png_err(s1) -# define png_fixed_error(s1,s2) png_err(s1) -#endif - -/* C allows up-casts from (void*) to any pointer and (const void*) to any - * pointer to a const object. C++ regards this as a type error and requires an - * explicit, static, cast and provides the static_cast<> rune to ensure that - * const is not cast away. - */ -#ifdef __cplusplus -# define png_voidcast(type, value) static_cast(value) -#else -# define png_voidcast(type, value) (value) -#endif /* __cplusplus */ - -#ifndef PNG_EXTERN -/* The functions exported by PNG_EXTERN are internal functions, which - * aren't usually used outside the library (as far as I know), so it is - * debatable if they should be exported at all. In the future, when it - * is possible to have run-time registry of chunk-handling functions, - * some of these might be made available again. - * - * 1.5.7: turned the use of 'extern' back on, since it is localized to pngpriv.h - * it should be safe now (it is unclear why it was turned off.) - */ -# define PNG_EXTERN extern -#endif - -/* Some fixed point APIs are still required even if not exported because - * they get used by the corresponding floating point APIs. This magic - * deals with this: - */ -#ifdef PNG_FIXED_POINT_SUPPORTED -# define PNGFAPI PNGAPI -#else -# define PNGFAPI /* PRIVATE */ -#endif - -/* Other defines specific to compilers can go here. Try to keep - * them inside an appropriate ifdef/endif pair for portability. - */ -#if defined(PNG_FLOATING_POINT_SUPPORTED) ||\ - defined(PNG_FLOATING_ARITHMETIC_SUPPORTED) - /* png.c requires the following ANSI-C constants if the conversion of - * floating point to ASCII is implemented therein: - * - * DBL_DIG Maximum number of decimal digits (can be set to any constant) - * DBL_MIN Smallest normalized fp number (can be set to an arbitrary value) - * DBL_MAX Maximum floating point number (can be set to an arbitrary value) - */ -# include - -# if (defined(__MWERKS__) && defined(macintosh)) || defined(applec) || \ - defined(THINK_C) || defined(__SC__) || defined(TARGET_OS_MAC) - /* We need to check that hasn't already been included earlier - * as it seems it doesn't agree with , yet we should really use - * if possible. - */ -# if !defined(__MATH_H__) && !defined(__MATH_H) && !defined(__cmath__) -# include -# endif -# else -# include -# endif -# if defined(_AMIGA) && defined(__SASC) && defined(_M68881) - /* Amiga SAS/C: We must include builtin FPU functions when compiling using - * MATH=68881 - */ -# include -# endif -#endif - -/* This provides the non-ANSI (far) memory allocation routines. */ -#if defined(__TURBOC__) && defined(__MSDOS__) -# include -# include -#endif - -#if defined(WIN32) || defined(_Windows) || defined(_WINDOWS) || \ - defined(_WIN32) || defined(__WIN32__) -# include /* defines _WINDOWS_ macro */ -#endif - -/* Moved here around 1.5.0beta36 from pngconf.h */ -/* Users may want to use these so they are not private. Any library - * functions that are passed far data must be model-independent. - */ - -/* Memory model/platform independent fns */ -#ifndef PNG_ABORT -# ifdef _WINDOWS_ -# define PNG_ABORT() ExitProcess(0) -# else -# define PNG_ABORT() abort() -# endif -#endif - -#ifdef USE_FAR_KEYWORD -/* Use this to make far-to-near assignments */ -# define CHECK 1 -# define NOCHECK 0 -# define CVT_PTR(ptr) (png_far_to_near(png_ptr,ptr,CHECK)) -# define CVT_PTR_NOCHECK(ptr) (png_far_to_near(png_ptr,ptr,NOCHECK)) -# define png_strlen _fstrlen -# define png_memcmp _fmemcmp /* SJT: added */ -# define png_memcpy _fmemcpy -# define png_memset _fmemset -#else -# ifdef _WINDOWS_ /* Favor Windows over C runtime fns */ -# define CVT_PTR(ptr) (ptr) -# define CVT_PTR_NOCHECK(ptr) (ptr) -# define png_strlen lstrlenA -# define png_memcmp memcmp -# define png_memcpy CopyMemory -# define png_memset memset -# else -# define CVT_PTR(ptr) (ptr) -# define CVT_PTR_NOCHECK(ptr) (ptr) -# define png_strlen strlen -# define png_memcmp memcmp /* SJT: added */ -# define png_memcpy memcpy -# define png_memset memset -# endif -#endif - -/* These macros may need to be architecture dependent. */ -#define PNG_ALIGN_NONE 0 /* do not use data alignment */ -#define PNG_ALIGN_ALWAYS 1 /* assume unaligned accesses are OK */ -#ifdef offsetof -# define PNG_ALIGN_OFFSET 2 /* use offsetof to determine alignment */ -#else -# define PNG_ALIGN_OFFSET -1 /* prevent the use of this */ -#endif -#define PNG_ALIGN_SIZE 3 /* use sizeof to determine alignment */ - -#ifndef PNG_ALIGN_TYPE - /* Default to using aligned access optimizations and requiring alignment to a - * multiple of the data type size. Override in a compiler specific fashion - * if necessary by inserting tests here: - */ -# define PNG_ALIGN_TYPE PNG_ALIGN_SIZE -#endif - -#if PNG_ALIGN_TYPE == PNG_ALIGN_SIZE - /* This is used because in some compiler implementations non-aligned - * structure members are supported, so the offsetof approach below fails. - * Set PNG_ALIGN_TO_SIZE=0 for compiler combinations where unaligned access - * is good for performance. Do not do this unless you have tested the result - * and understand it. - */ -# define png_alignof(type) (sizeof (type)) -#else -# if PNG_ALIGN_TYPE == PNG_ALIGN_OFFSET -# define png_alignof(type) offsetof(struct{char c; type t;}, t) -# else -# if PNG_ALIGN_TYPE == PNG_ALIGN_ALWAYS -# define png_alignof(type) (1) -# endif - /* Else leave png_alignof undefined to prevent use thereof */ -# endif -#endif - -/* This implicitly assumes alignment is always to a power of 2. */ -#ifdef png_alignof -# define png_isaligned(ptr, type)\ - ((((const char*)ptr-(const char*)0) & (png_alignof(type)-1)) == 0) -#else -# define png_isaligned(ptr, type) 0 -#endif - -/* End of memory model/platform independent support */ -/* End of 1.5.0beta36 move from pngconf.h */ - -/* CONSTANTS and UTILITY MACROS - * These are used internally by libpng and not exposed in the API - */ - -/* Various modes of operation. Note that after an init, mode is set to - * zero automatically when the structure is created. Three of these - * are defined in png.h because they need to be visible to applications - * that call png_set_unknown_chunk(). - */ -/* #define PNG_HAVE_IHDR 0x01 (defined in png.h) */ -/* #define PNG_HAVE_PLTE 0x02 (defined in png.h) */ -#define PNG_HAVE_IDAT 0x04 -/* #define PNG_AFTER_IDAT 0x08 (defined in png.h) */ -#define PNG_HAVE_IEND 0x10 -#define PNG_HAVE_gAMA 0x20 -#define PNG_HAVE_cHRM 0x40 -#define PNG_HAVE_sRGB 0x80 -#define PNG_HAVE_CHUNK_HEADER 0x100 -#define PNG_WROTE_tIME 0x200 -#define PNG_WROTE_INFO_BEFORE_PLTE 0x400 -#define PNG_BACKGROUND_IS_GRAY 0x800 -#define PNG_HAVE_PNG_SIGNATURE 0x1000 -#define PNG_HAVE_CHUNK_AFTER_IDAT 0x2000 /* Have another chunk after IDAT */ -#define PNG_HAVE_iCCP 0x4000 - -/* Flags for the transformations the PNG library does on the image data */ -#define PNG_BGR 0x0001 -#define PNG_INTERLACE 0x0002 -#define PNG_PACK 0x0004 -#define PNG_SHIFT 0x0008 -#define PNG_SWAP_BYTES 0x0010 -#define PNG_INVERT_MONO 0x0020 -#define PNG_QUANTIZE 0x0040 -#define PNG_COMPOSE 0x0080 /* Was PNG_BACKGROUND */ -#define PNG_BACKGROUND_EXPAND 0x0100 -#define PNG_EXPAND_16 0x0200 /* Added to libpng 1.5.2 */ -#define PNG_16_TO_8 0x0400 /* Becomes 'chop' in 1.5.4 */ -#define PNG_RGBA 0x0800 -#define PNG_EXPAND 0x1000 -#define PNG_GAMMA 0x2000 -#define PNG_GRAY_TO_RGB 0x4000 -#define PNG_FILLER 0x8000 -#define PNG_PACKSWAP 0x10000 -#define PNG_SWAP_ALPHA 0x20000 -#define PNG_STRIP_ALPHA 0x40000 -#define PNG_INVERT_ALPHA 0x80000 -#define PNG_USER_TRANSFORM 0x100000 -#define PNG_RGB_TO_GRAY_ERR 0x200000 -#define PNG_RGB_TO_GRAY_WARN 0x400000 -#define PNG_RGB_TO_GRAY 0x600000 /* two bits, RGB_TO_GRAY_ERR|WARN */ -#define PNG_ENCODE_ALPHA 0x800000 /* Added to libpng-1.5.4 */ -#define PNG_ADD_ALPHA 0x1000000 /* Added to libpng-1.2.7 */ -#define PNG_EXPAND_tRNS 0x2000000 /* Added to libpng-1.2.9 */ -#define PNG_SCALE_16_TO_8 0x4000000 /* Added to libpng-1.5.4 */ - /* 0x8000000 unused */ - /* 0x10000000 unused */ - /* 0x20000000 unused */ - /* 0x40000000 unused */ -/* Flags for png_create_struct */ -#define PNG_STRUCT_PNG 0x0001 -#define PNG_STRUCT_INFO 0x0002 - -/* Scaling factor for filter heuristic weighting calculations */ -#define PNG_WEIGHT_FACTOR (1<<(PNG_WEIGHT_SHIFT)) -#define PNG_COST_FACTOR (1<<(PNG_COST_SHIFT)) - -/* Flags for the png_ptr->flags rather than declaring a byte for each one */ -#define PNG_FLAG_ZLIB_CUSTOM_STRATEGY 0x0001 -#define PNG_FLAG_ZLIB_CUSTOM_LEVEL 0x0002 -#define PNG_FLAG_ZLIB_CUSTOM_MEM_LEVEL 0x0004 -#define PNG_FLAG_ZLIB_CUSTOM_WINDOW_BITS 0x0008 -#define PNG_FLAG_ZLIB_CUSTOM_METHOD 0x0010 -#define PNG_FLAG_ZLIB_FINISHED 0x0020 -#define PNG_FLAG_ROW_INIT 0x0040 -#define PNG_FLAG_FILLER_AFTER 0x0080 -#define PNG_FLAG_CRC_ANCILLARY_USE 0x0100 -#define PNG_FLAG_CRC_ANCILLARY_NOWARN 0x0200 -#define PNG_FLAG_CRC_CRITICAL_USE 0x0400 -#define PNG_FLAG_CRC_CRITICAL_IGNORE 0x0800 -#define PNG_FLAG_ASSUME_sRGB 0x1000 /* Added to libpng-1.5.4 */ -#define PNG_FLAG_OPTIMIZE_ALPHA 0x2000 /* Added to libpng-1.5.4 */ -#define PNG_FLAG_DETECT_UNINITIALIZED 0x4000 /* Added to libpng-1.5.4 */ -#define PNG_FLAG_KEEP_UNKNOWN_CHUNKS 0x8000 -#define PNG_FLAG_KEEP_UNSAFE_CHUNKS 0x10000 -#define PNG_FLAG_LIBRARY_MISMATCH 0x20000 -#define PNG_FLAG_STRIP_ERROR_NUMBERS 0x40000 -#define PNG_FLAG_STRIP_ERROR_TEXT 0x80000 -#define PNG_FLAG_MALLOC_NULL_MEM_OK 0x100000 - /* 0x200000 unused */ - /* 0x400000 unused */ -#define PNG_FLAG_BENIGN_ERRORS_WARN 0x800000 /* Added to libpng-1.4.0 */ -#define PNG_FLAG_ZTXT_CUSTOM_STRATEGY 0x1000000 /* 5 lines added */ -#define PNG_FLAG_ZTXT_CUSTOM_LEVEL 0x2000000 /* to libpng-1.5.4 */ -#define PNG_FLAG_ZTXT_CUSTOM_MEM_LEVEL 0x4000000 -#define PNG_FLAG_ZTXT_CUSTOM_WINDOW_BITS 0x8000000 -#define PNG_FLAG_ZTXT_CUSTOM_METHOD 0x10000000 - /* 0x20000000 unused */ - /* 0x40000000 unused */ - -#define PNG_FLAG_CRC_ANCILLARY_MASK (PNG_FLAG_CRC_ANCILLARY_USE | \ - PNG_FLAG_CRC_ANCILLARY_NOWARN) - -#define PNG_FLAG_CRC_CRITICAL_MASK (PNG_FLAG_CRC_CRITICAL_USE | \ - PNG_FLAG_CRC_CRITICAL_IGNORE) - -#define PNG_FLAG_CRC_MASK (PNG_FLAG_CRC_ANCILLARY_MASK | \ - PNG_FLAG_CRC_CRITICAL_MASK) - -/* zlib.h declares a magic type 'uInt' that limits the amount of data that zlib - * can handle at once. This type need be no larger than 16 bits (so maximum of - * 65535), this define allows us to discover how big it is, but limited by the - * maximuum for png_size_t. The value can be overriden in a library build - * (pngusr.h, or set it in CPPFLAGS) and it works to set it to a considerably - * lower value (e.g. 255 works). A lower value may help memory usage (slightly) - * and may even improve performance on some systems (and degrade it on others.) - */ -#ifndef ZLIB_IO_MAX -# define ZLIB_IO_MAX ((uInt)-1) -#endif - -/* Save typing and make code easier to understand */ - -#define PNG_COLOR_DIST(c1, c2) (abs((int)((c1).red) - (int)((c2).red)) + \ - abs((int)((c1).green) - (int)((c2).green)) + \ - abs((int)((c1).blue) - (int)((c2).blue))) - -/* Added to libpng-1.2.6 JB */ -#define PNG_ROWBYTES(pixel_bits, width) \ - ((pixel_bits) >= 8 ? \ - ((png_size_t)(width) * (((png_size_t)(pixel_bits)) >> 3)) : \ - (( ((png_size_t)(width) * ((png_size_t)(pixel_bits))) + 7) >> 3) ) - -/* PNG_OUT_OF_RANGE returns true if value is outside the range - * ideal-delta..ideal+delta. Each argument is evaluated twice. - * "ideal" and "delta" should be constants, normally simple - * integers, "value" a variable. Added to libpng-1.2.6 JB - */ -#define PNG_OUT_OF_RANGE(value, ideal, delta) \ - ( (value) < (ideal)-(delta) || (value) > (ideal)+(delta) ) - -/* Conversions between fixed and floating point, only defined if - * required (to make sure the code doesn't accidentally use float - * when it is supposedly disabled.) - */ -#ifdef PNG_FLOATING_POINT_SUPPORTED -/* The floating point conversion can't overflow, though it can and - * does lose accuracy relative to the original fixed point value. - * In practice this doesn't matter because png_fixed_point only - * stores numbers with very low precision. The png_ptr and s - * arguments are unused by default but are there in case error - * checking becomes a requirement. - */ -#define png_float(png_ptr, fixed, s) (.00001 * (fixed)) - -/* The fixed point conversion performs range checking and evaluates - * its argument multiple times, so must be used with care. The - * range checking uses the PNG specification values for a signed - * 32 bit fixed point value except that the values are deliberately - * rounded-to-zero to an integral value - 21474 (21474.83 is roughly - * (2^31-1) * 100000). 's' is a string that describes the value being - * converted. - * - * NOTE: this macro will raise a png_error if the range check fails, - * therefore it is normally only appropriate to use this on values - * that come from API calls or other sources where an out of range - * error indicates a programming error, not a data error! - * - * NOTE: by default this is off - the macro is not used - because the - * function call saves a lot of code. - */ -#ifdef PNG_FIXED_POINT_MACRO_SUPPORTED -#define png_fixed(png_ptr, fp, s) ((fp) <= 21474 && (fp) >= -21474 ?\ - ((png_fixed_point)(100000 * (fp))) : (png_fixed_error(png_ptr, s),0)) -#else -PNG_EXTERN png_fixed_point png_fixed PNGARG((png_structp png_ptr, double fp, - png_const_charp text)); -#endif -#endif - -/* Constants for known chunk types. If you need to add a chunk, define the name - * here. For historical reasons these constants have the form png_; i.e. - * the prefix is lower case. Please use decimal values as the parameters to - * match the ISO PNG specification and to avoid relying on the C locale - * interpretation of character values. - * - * Prior to 1.5.6 these constants were strings, as of 1.5.6 png_uint_32 values - * are computed and a new macro (PNG_STRING_FROM_CHUNK) added to allow a string - * to be generated if required. - * - * PNG_32b correctly produces a value shifted by up to 24 bits, even on - * architectures where (int) is only 16 bits. - */ -#define PNG_32b(b,s) ((png_uint_32)(b) << (s)) -#define PNG_CHUNK(b1,b2,b3,b4) \ - (PNG_32b(b1,24) | PNG_32b(b2,16) | PNG_32b(b3,8) | PNG_32b(b4,0)) - -#define png_IHDR PNG_CHUNK( 73, 72, 68, 82) -#define png_IDAT PNG_CHUNK( 73, 68, 65, 84) -#define png_IEND PNG_CHUNK( 73, 69, 78, 68) -#define png_PLTE PNG_CHUNK( 80, 76, 84, 69) -#define png_bKGD PNG_CHUNK( 98, 75, 71, 68) -#define png_cHRM PNG_CHUNK( 99, 72, 82, 77) -#define png_gAMA PNG_CHUNK(103, 65, 77, 65) -#define png_hIST PNG_CHUNK(104, 73, 83, 84) -#define png_iCCP PNG_CHUNK(105, 67, 67, 80) -#define png_iTXt PNG_CHUNK(105, 84, 88, 116) -#define png_oFFs PNG_CHUNK(111, 70, 70, 115) -#define png_pCAL PNG_CHUNK(112, 67, 65, 76) -#define png_sCAL PNG_CHUNK(115, 67, 65, 76) -#define png_pHYs PNG_CHUNK(112, 72, 89, 115) -#define png_sBIT PNG_CHUNK(115, 66, 73, 84) -#define png_sPLT PNG_CHUNK(115, 80, 76, 84) -#define png_sRGB PNG_CHUNK(115, 82, 71, 66) -#define png_sTER PNG_CHUNK(115, 84, 69, 82) -#define png_tEXt PNG_CHUNK(116, 69, 88, 116) -#define png_tIME PNG_CHUNK(116, 73, 77, 69) -#define png_tRNS PNG_CHUNK(116, 82, 78, 83) -#define png_zTXt PNG_CHUNK(122, 84, 88, 116) - -/* The following will work on (signed char*) strings, whereas the get_uint_32 - * macro will fail on top-bit-set values because of the sign extension. - */ -#define PNG_CHUNK_FROM_STRING(s)\ - PNG_CHUNK(0xff&(s)[0], 0xff&(s)[1], 0xff&(s)[2], 0xff&(s)[3]) - -/* This uses (char), not (png_byte) to avoid warnings on systems where (char) is - * signed and the argument is a (char[]) This macro will fail miserably on - * systems where (char) is more than 8 bits. - */ -#define PNG_STRING_FROM_CHUNK(s,c)\ - (void)(((char*)(s))[0]=(char)((c)>>24), ((char*)(s))[1]=(char)((c)>>16),\ - ((char*)(s))[2]=(char)((c)>>8), ((char*)(s))[3]=(char)((c))) - -/* Do the same but terminate with a null character. */ -#define PNG_CSTRING_FROM_CHUNK(s,c)\ - (void)(PNG_STRING_FROM_CHUNK(s,c), ((char*)(s))[4] = 0) - -/* Test on flag values as defined in the spec (section 5.4): */ -#define PNG_CHUNK_ANCILLIARY(c) (1 & ((c) >> 29)) -#define PNG_CHUNK_CRITICAL(c) (!PNG_CHUNK_ANCILLIARY(c)) -#define PNG_CHUNK_PRIVATE(c) (1 & ((c) >> 21)) -#define PNG_CHUNK_RESERVED(c) (1 & ((c) >> 13)) -#define PNG_CHUNK_SAFE_TO_COPY(c) (1 & ((c) >> 5)) - -/* Gamma values (new at libpng-1.5.4): */ -#define PNG_GAMMA_MAC_OLD 151724 /* Assume '1.8' is really 2.2/1.45! */ -#define PNG_GAMMA_MAC_INVERSE 65909 -#define PNG_GAMMA_sRGB_INVERSE 45455 - - -/* Inhibit C++ name-mangling for libpng functions but not for system calls. */ -#ifdef __cplusplus -extern "C" { -#endif /* __cplusplus */ - -/* These functions are used internally in the code. They generally - * shouldn't be used unless you are writing code to add or replace some - * functionality in libpng. More information about most functions can - * be found in the files where the functions are located. - */ - -/* Check the user version string for compatibility, returns false if the version - * numbers aren't compatible. - */ -PNG_EXTERN int png_user_version_check(png_structp png_ptr, - png_const_charp user_png_ver); - -/* Allocate memory for an internal libpng struct */ -PNG_EXTERN PNG_FUNCTION(png_voidp,png_create_struct,PNGARG((int type)), - PNG_ALLOCATED); - -/* Free memory from internal libpng struct */ -PNG_EXTERN void png_destroy_struct PNGARG((png_voidp struct_ptr)); - -PNG_EXTERN PNG_FUNCTION(png_voidp,png_create_struct_2, - PNGARG((int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr)), - PNG_ALLOCATED); -PNG_EXTERN void png_destroy_struct_2 PNGARG((png_voidp struct_ptr, - png_free_ptr free_fn, png_voidp mem_ptr)); - -/* Free any memory that info_ptr points to and reset struct. */ -PNG_EXTERN void png_info_destroy PNGARG((png_structp png_ptr, - png_infop info_ptr)); - -/* Function to allocate memory for zlib. PNGAPI is disallowed. */ -PNG_EXTERN PNG_FUNCTION(voidpf,png_zalloc,PNGARG((voidpf png_ptr, uInt items, - uInt size)),PNG_ALLOCATED); - -/* Function to free memory for zlib. PNGAPI is disallowed. */ -PNG_EXTERN void png_zfree PNGARG((voidpf png_ptr, voidpf ptr)); - -/* Next four functions are used internally as callbacks. PNGCBAPI is required - * but not PNG_EXPORT. PNGAPI added at libpng version 1.2.3, changed to - * PNGCBAPI at 1.5.0 - */ - -PNG_EXTERN void PNGCBAPI png_default_read_data PNGARG((png_structp png_ptr, - png_bytep data, png_size_t length)); - -#ifdef PNG_PROGRESSIVE_READ_SUPPORTED -PNG_EXTERN void PNGCBAPI png_push_fill_buffer PNGARG((png_structp png_ptr, - png_bytep buffer, png_size_t length)); -#endif - -PNG_EXTERN void PNGCBAPI png_default_write_data PNGARG((png_structp png_ptr, - png_bytep data, png_size_t length)); - -#ifdef PNG_WRITE_FLUSH_SUPPORTED -# ifdef PNG_STDIO_SUPPORTED -PNG_EXTERN void PNGCBAPI png_default_flush PNGARG((png_structp png_ptr)); -# endif -#endif - -/* Reset the CRC variable */ -PNG_EXTERN void png_reset_crc PNGARG((png_structp png_ptr)); - -/* Write the "data" buffer to whatever output you are using */ -PNG_EXTERN void png_write_data PNGARG((png_structp png_ptr, - png_const_bytep data, png_size_t length)); - -/* Read and check the PNG file signature */ -PNG_EXTERN void png_read_sig PNGARG((png_structp png_ptr, png_infop info_ptr)); - -/* Read the chunk header (length + type name) */ -PNG_EXTERN png_uint_32 png_read_chunk_header PNGARG((png_structp png_ptr)); - -/* Read data from whatever input you are using into the "data" buffer */ -PNG_EXTERN void png_read_data PNGARG((png_structp png_ptr, png_bytep data, - png_size_t length)); - -/* Read bytes into buf, and update png_ptr->crc */ -PNG_EXTERN void png_crc_read PNGARG((png_structp png_ptr, png_bytep buf, - png_size_t length)); - -/* Decompress data in a chunk that uses compression */ -#if defined(PNG_READ_COMPRESSED_TEXT_SUPPORTED) -PNG_EXTERN void png_decompress_chunk PNGARG((png_structp png_ptr, - int comp_type, png_size_t chunklength, png_size_t prefix_length, - png_size_t *data_length)); -#endif - -/* Read "skip" bytes, read the file crc, and (optionally) verify png_ptr->crc */ -PNG_EXTERN int png_crc_finish PNGARG((png_structp png_ptr, png_uint_32 skip)); - -/* Read the CRC from the file and compare it to the libpng calculated CRC */ -PNG_EXTERN int png_crc_error PNGARG((png_structp png_ptr)); - -/* Calculate the CRC over a section of data. Note that we are only - * passing a maximum of 64K on systems that have this as a memory limit, - * since this is the maximum buffer size we can specify. - */ -PNG_EXTERN void png_calculate_crc PNGARG((png_structp png_ptr, - png_const_bytep ptr, png_size_t length)); - -#ifdef PNG_WRITE_FLUSH_SUPPORTED -PNG_EXTERN void png_flush PNGARG((png_structp png_ptr)); -#endif - -/* Write various chunks */ - -/* Write the IHDR chunk, and update the png_struct with the necessary - * information. - */ -PNG_EXTERN void png_write_IHDR PNGARG((png_structp png_ptr, png_uint_32 width, - png_uint_32 height, - int bit_depth, int color_type, int compression_method, int filter_method, - int interlace_method)); - -PNG_EXTERN void png_write_PLTE PNGARG((png_structp png_ptr, - png_const_colorp palette, png_uint_32 num_pal)); - -PNG_EXTERN void png_write_IDAT PNGARG((png_structp png_ptr, png_bytep data, - png_size_t length)); - -PNG_EXTERN void png_write_IEND PNGARG((png_structp png_ptr)); - -#ifdef PNG_WRITE_gAMA_SUPPORTED -# ifdef PNG_FLOATING_POINT_SUPPORTED -PNG_EXTERN void png_write_gAMA PNGARG((png_structp png_ptr, double file_gamma)); -# endif -# ifdef PNG_FIXED_POINT_SUPPORTED -PNG_EXTERN void png_write_gAMA_fixed PNGARG((png_structp png_ptr, - png_fixed_point file_gamma)); -# endif -#endif - -#ifdef PNG_WRITE_sBIT_SUPPORTED -PNG_EXTERN void png_write_sBIT PNGARG((png_structp png_ptr, - png_const_color_8p sbit, int color_type)); -#endif - -#ifdef PNG_WRITE_cHRM_SUPPORTED -# ifdef PNG_FLOATING_POINT_SUPPORTED -PNG_EXTERN void png_write_cHRM PNGARG((png_structp png_ptr, - double white_x, double white_y, - double red_x, double red_y, double green_x, double green_y, - double blue_x, double blue_y)); -# endif -PNG_EXTERN void png_write_cHRM_fixed PNGARG((png_structp png_ptr, - png_fixed_point int_white_x, png_fixed_point int_white_y, - png_fixed_point int_red_x, png_fixed_point int_red_y, png_fixed_point - int_green_x, png_fixed_point int_green_y, png_fixed_point int_blue_x, - png_fixed_point int_blue_y)); -#endif - -#ifdef PNG_WRITE_sRGB_SUPPORTED -PNG_EXTERN void png_write_sRGB PNGARG((png_structp png_ptr, - int intent)); -#endif - -#ifdef PNG_WRITE_iCCP_SUPPORTED -PNG_EXTERN void png_write_iCCP PNGARG((png_structp png_ptr, - png_const_charp name, int compression_type, - png_const_charp profile, int proflen)); - /* Note to maintainer: profile should be png_bytep */ -#endif - -#ifdef PNG_WRITE_sPLT_SUPPORTED -PNG_EXTERN void png_write_sPLT PNGARG((png_structp png_ptr, - png_const_sPLT_tp palette)); -#endif - -#ifdef PNG_WRITE_tRNS_SUPPORTED -PNG_EXTERN void png_write_tRNS PNGARG((png_structp png_ptr, - png_const_bytep trans, png_const_color_16p values, int number, - int color_type)); -#endif - -#ifdef PNG_WRITE_bKGD_SUPPORTED -PNG_EXTERN void png_write_bKGD PNGARG((png_structp png_ptr, - png_const_color_16p values, int color_type)); -#endif - -#ifdef PNG_WRITE_hIST_SUPPORTED -PNG_EXTERN void png_write_hIST PNGARG((png_structp png_ptr, - png_const_uint_16p hist, int num_hist)); -#endif - -/* Chunks that have keywords */ -#if defined(PNG_WRITE_TEXT_SUPPORTED) || defined(PNG_WRITE_pCAL_SUPPORTED) || \ - defined(PNG_WRITE_iCCP_SUPPORTED) || defined(PNG_WRITE_sPLT_SUPPORTED) -PNG_EXTERN png_size_t png_check_keyword PNGARG((png_structp png_ptr, - png_const_charp key, png_charpp new_key)); -#endif - -#ifdef PNG_WRITE_tEXt_SUPPORTED -PNG_EXTERN void png_write_tEXt PNGARG((png_structp png_ptr, png_const_charp key, - png_const_charp text, png_size_t text_len)); -#endif - -#ifdef PNG_WRITE_zTXt_SUPPORTED -PNG_EXTERN void png_write_zTXt PNGARG((png_structp png_ptr, png_const_charp key, - png_const_charp text, png_size_t text_len, int compression)); -#endif - -#ifdef PNG_WRITE_iTXt_SUPPORTED -PNG_EXTERN void png_write_iTXt PNGARG((png_structp png_ptr, - int compression, png_const_charp key, png_const_charp lang, - png_const_charp lang_key, png_const_charp text)); -#endif - -#ifdef PNG_TEXT_SUPPORTED /* Added at version 1.0.14 and 1.2.4 */ -PNG_EXTERN int png_set_text_2 PNGARG((png_structp png_ptr, - png_infop info_ptr, png_const_textp text_ptr, int num_text)); -#endif - -#ifdef PNG_WRITE_oFFs_SUPPORTED -PNG_EXTERN void png_write_oFFs PNGARG((png_structp png_ptr, - png_int_32 x_offset, png_int_32 y_offset, int unit_type)); -#endif - -#ifdef PNG_WRITE_pCAL_SUPPORTED -PNG_EXTERN void png_write_pCAL PNGARG((png_structp png_ptr, png_charp purpose, - png_int_32 X0, png_int_32 X1, int type, int nparams, - png_const_charp units, png_charpp params)); -#endif - -#ifdef PNG_WRITE_pHYs_SUPPORTED -PNG_EXTERN void png_write_pHYs PNGARG((png_structp png_ptr, - png_uint_32 x_pixels_per_unit, png_uint_32 y_pixels_per_unit, - int unit_type)); -#endif - -#ifdef PNG_WRITE_tIME_SUPPORTED -PNG_EXTERN void png_write_tIME PNGARG((png_structp png_ptr, - png_const_timep mod_time)); -#endif - -#ifdef PNG_WRITE_sCAL_SUPPORTED -PNG_EXTERN void png_write_sCAL_s PNGARG((png_structp png_ptr, - int unit, png_const_charp width, png_const_charp height)); -#endif - -/* Called when finished processing a row of data */ -PNG_EXTERN void png_write_finish_row PNGARG((png_structp png_ptr)); - -/* Internal use only. Called before first row of data */ -PNG_EXTERN void png_write_start_row PNGARG((png_structp png_ptr)); - -/* Combine a row of data, dealing with alpha, etc. if requested. 'row' is an - * array of png_ptr->width pixels. If the image is not interlaced or this - * is the final pass this just does a png_memcpy, otherwise the "display" flag - * is used to determine whether to copy pixels that are not in the current pass. - * - * Because 'png_do_read_interlace' (below) replicates pixels this allows this - * function to achieve the documented 'blocky' appearance during interlaced read - * if display is 1 and the 'sparkle' appearance, where existing pixels in 'row' - * are not changed if they are not in the current pass, when display is 0. - * - * 'display' must be 0 or 1, otherwise the memcpy will be done regardless. - * - * The API always reads from the png_struct row buffer and always assumes that - * it is full width (png_do_read_interlace has already been called.) - * - * This function is only ever used to write to row buffers provided by the - * caller of the relevant libpng API and the row must have already been - * transformed by the read transformations. - * - * The PNG_USE_COMPILE_TIME_MASKS option causes generation of pre-computed - * bitmasks for use within the code, otherwise runtime generated masks are used. - * The default is compile time masks. - */ -#ifndef PNG_USE_COMPILE_TIME_MASKS -# define PNG_USE_COMPILE_TIME_MASKS 1 -#endif -PNG_EXTERN void png_combine_row PNGARG((png_structp png_ptr, png_bytep row, - int display)); - -#ifdef PNG_READ_INTERLACING_SUPPORTED -/* Expand an interlaced row: the 'row_info' describes the pass data that has - * been read in and must correspond to the pixels in 'row', the pixels are - * expanded (moved apart) in 'row' to match the final layout, when doing this - * the pixels are *replicated* to the intervening space. This is essential for - * the correct operation of png_combine_row, above. - */ -PNG_EXTERN void png_do_read_interlace PNGARG((png_row_infop row_info, - png_bytep row, int pass, png_uint_32 transformations)); -#endif - -/* GRR TO DO (2.0 or whenever): simplify other internal calling interfaces */ - -#ifdef PNG_WRITE_INTERLACING_SUPPORTED -/* Grab pixels out of a row for an interlaced pass */ -PNG_EXTERN void png_do_write_interlace PNGARG((png_row_infop row_info, - png_bytep row, int pass)); -#endif - -/* Unfilter a row: check the filter value before calling this, there is no point - * calling it for PNG_FILTER_VALUE_NONE. - */ -PNG_EXTERN void png_read_filter_row PNGARG((png_structp pp, png_row_infop row_info, - png_bytep row, png_const_bytep prev_row, int filter)); - -PNG_EXTERN void png_read_filter_row_up_neon PNGARG((png_row_infop row_info, - png_bytep row, png_const_bytep prev_row)); -PNG_EXTERN void png_read_filter_row_sub3_neon PNGARG((png_row_infop row_info, - png_bytep row, png_const_bytep prev_row)); -PNG_EXTERN void png_read_filter_row_sub4_neon PNGARG((png_row_infop row_info, - png_bytep row, png_const_bytep prev_row)); -PNG_EXTERN void png_read_filter_row_avg3_neon PNGARG((png_row_infop row_info, - png_bytep row, png_const_bytep prev_row)); -PNG_EXTERN void png_read_filter_row_avg4_neon PNGARG((png_row_infop row_info, - png_bytep row, png_const_bytep prev_row)); -PNG_EXTERN void png_read_filter_row_paeth3_neon PNGARG((png_row_infop row_info, - png_bytep row, png_const_bytep prev_row)); -PNG_EXTERN void png_read_filter_row_paeth4_neon PNGARG((png_row_infop row_info, - png_bytep row, png_const_bytep prev_row)); - -/* Choose the best filter to use and filter the row data */ -PNG_EXTERN void png_write_find_filter PNGARG((png_structp png_ptr, - png_row_infop row_info)); - -/* Finish a row while reading, dealing with interlacing passes, etc. */ -PNG_EXTERN void png_read_finish_row PNGARG((png_structp png_ptr)); - -/* Initialize the row buffers, etc. */ -PNG_EXTERN void png_read_start_row PNGARG((png_structp png_ptr)); - -#ifdef PNG_READ_TRANSFORMS_SUPPORTED -/* Optional call to update the users info structure */ -PNG_EXTERN void png_read_transform_info PNGARG((png_structp png_ptr, - png_infop info_ptr)); -#endif - -/* These are the functions that do the transformations */ -#ifdef PNG_READ_FILLER_SUPPORTED -PNG_EXTERN void png_do_read_filler PNGARG((png_row_infop row_info, - png_bytep row, png_uint_32 filler, png_uint_32 flags)); -#endif - -#ifdef PNG_READ_SWAP_ALPHA_SUPPORTED -PNG_EXTERN void png_do_read_swap_alpha PNGARG((png_row_infop row_info, - png_bytep row)); -#endif - -#ifdef PNG_WRITE_SWAP_ALPHA_SUPPORTED -PNG_EXTERN void png_do_write_swap_alpha PNGARG((png_row_infop row_info, - png_bytep row)); -#endif - -#ifdef PNG_READ_INVERT_ALPHA_SUPPORTED -PNG_EXTERN void png_do_read_invert_alpha PNGARG((png_row_infop row_info, - png_bytep row)); -#endif - -#ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED -PNG_EXTERN void png_do_write_invert_alpha PNGARG((png_row_infop row_info, - png_bytep row)); -#endif - -#if defined(PNG_WRITE_FILLER_SUPPORTED) || \ - defined(PNG_READ_STRIP_ALPHA_SUPPORTED) -PNG_EXTERN void png_do_strip_channel PNGARG((png_row_infop row_info, - png_bytep row, int at_start)); -#endif - -#ifdef PNG_16BIT_SUPPORTED -#if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED) -PNG_EXTERN void png_do_swap PNGARG((png_row_infop row_info, - png_bytep row)); -#endif -#endif - -#if defined(PNG_READ_PACKSWAP_SUPPORTED) || \ - defined(PNG_WRITE_PACKSWAP_SUPPORTED) -PNG_EXTERN void png_do_packswap PNGARG((png_row_infop row_info, - png_bytep row)); -#endif - -#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED -PNG_EXTERN int png_do_rgb_to_gray PNGARG((png_structp png_ptr, - png_row_infop row_info, png_bytep row)); -#endif - -#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED -PNG_EXTERN void png_do_gray_to_rgb PNGARG((png_row_infop row_info, - png_bytep row)); -#endif - -#ifdef PNG_READ_PACK_SUPPORTED -PNG_EXTERN void png_do_unpack PNGARG((png_row_infop row_info, - png_bytep row)); -#endif - -#ifdef PNG_READ_SHIFT_SUPPORTED -PNG_EXTERN void png_do_unshift PNGARG((png_row_infop row_info, - png_bytep row, png_const_color_8p sig_bits)); -#endif - -#if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED) -PNG_EXTERN void png_do_invert PNGARG((png_row_infop row_info, - png_bytep row)); -#endif - -#ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED -PNG_EXTERN void png_do_scale_16_to_8 PNGARG((png_row_infop row_info, - png_bytep row)); -#endif - -#ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED -PNG_EXTERN void png_do_chop PNGARG((png_row_infop row_info, - png_bytep row)); -#endif - -#ifdef PNG_READ_QUANTIZE_SUPPORTED -PNG_EXTERN void png_do_quantize PNGARG((png_row_infop row_info, - png_bytep row, png_const_bytep palette_lookup, - png_const_bytep quantize_lookup)); - -# ifdef PNG_CORRECT_PALETTE_SUPPORTED -PNG_EXTERN void png_correct_palette PNGARG((png_structp png_ptr, - png_colorp palette, int num_palette)); -# endif -#endif - -#if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED) -PNG_EXTERN void png_do_bgr PNGARG((png_row_infop row_info, - png_bytep row)); -#endif - -#ifdef PNG_WRITE_PACK_SUPPORTED -PNG_EXTERN void png_do_pack PNGARG((png_row_infop row_info, - png_bytep row, png_uint_32 bit_depth)); -#endif - -#ifdef PNG_WRITE_SHIFT_SUPPORTED -PNG_EXTERN void png_do_shift PNGARG((png_row_infop row_info, - png_bytep row, png_const_color_8p bit_depth)); -#endif - -#if defined(PNG_READ_BACKGROUND_SUPPORTED) ||\ - defined(PNG_READ_ALPHA_MODE_SUPPORTED) -PNG_EXTERN void png_do_compose PNGARG((png_row_infop row_info, - png_bytep row, png_structp png_ptr)); -#endif - -#ifdef PNG_READ_GAMMA_SUPPORTED -PNG_EXTERN void png_do_gamma PNGARG((png_row_infop row_info, - png_bytep row, png_structp png_ptr)); -#endif - -#ifdef PNG_READ_ALPHA_MODE_SUPPORTED -PNG_EXTERN void png_do_encode_alpha PNGARG((png_row_infop row_info, - png_bytep row, png_structp png_ptr)); -#endif - -#ifdef PNG_READ_EXPAND_SUPPORTED -PNG_EXTERN void png_do_expand_palette PNGARG((png_row_infop row_info, - png_bytep row, png_const_colorp palette, png_const_bytep trans, - int num_trans)); -PNG_EXTERN void png_do_expand PNGARG((png_row_infop row_info, - png_bytep row, png_const_color_16p trans_color)); -#endif - -#ifdef PNG_READ_EXPAND_16_SUPPORTED -PNG_EXTERN void png_do_expand_16 PNGARG((png_row_infop row_info, - png_bytep row)); -#endif - -/* The following decodes the appropriate chunks, and does error correction, - * then calls the appropriate callback for the chunk if it is valid. - */ - -/* Decode the IHDR chunk */ -PNG_EXTERN void png_handle_IHDR PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -PNG_EXTERN void png_handle_PLTE PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -PNG_EXTERN void png_handle_IEND PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); - -#ifdef PNG_READ_bKGD_SUPPORTED -PNG_EXTERN void png_handle_bKGD PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#ifdef PNG_READ_cHRM_SUPPORTED -PNG_EXTERN void png_handle_cHRM PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#ifdef PNG_READ_gAMA_SUPPORTED -PNG_EXTERN void png_handle_gAMA PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#ifdef PNG_READ_hIST_SUPPORTED -PNG_EXTERN void png_handle_hIST PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#ifdef PNG_READ_iCCP_SUPPORTED -PNG_EXTERN void png_handle_iCCP PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif /* PNG_READ_iCCP_SUPPORTED */ - -#ifdef PNG_READ_iTXt_SUPPORTED -PNG_EXTERN void png_handle_iTXt PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#ifdef PNG_READ_oFFs_SUPPORTED -PNG_EXTERN void png_handle_oFFs PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#ifdef PNG_READ_pCAL_SUPPORTED -PNG_EXTERN void png_handle_pCAL PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#ifdef PNG_READ_pHYs_SUPPORTED -PNG_EXTERN void png_handle_pHYs PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#ifdef PNG_READ_sBIT_SUPPORTED -PNG_EXTERN void png_handle_sBIT PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#ifdef PNG_READ_sCAL_SUPPORTED -PNG_EXTERN void png_handle_sCAL PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#ifdef PNG_READ_sPLT_SUPPORTED -PNG_EXTERN void png_handle_sPLT PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif /* PNG_READ_sPLT_SUPPORTED */ - -#ifdef PNG_READ_sRGB_SUPPORTED -PNG_EXTERN void png_handle_sRGB PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#ifdef PNG_READ_tEXt_SUPPORTED -PNG_EXTERN void png_handle_tEXt PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#ifdef PNG_READ_tIME_SUPPORTED -PNG_EXTERN void png_handle_tIME PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#ifdef PNG_READ_tRNS_SUPPORTED -PNG_EXTERN void png_handle_tRNS PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#ifdef PNG_READ_zTXt_SUPPORTED -PNG_EXTERN void png_handle_zTXt PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED -PNG_EXTERN void png_handle_unknown PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_32 length)); -#endif - -PNG_EXTERN void png_check_chunk_name PNGARG((png_structp png_ptr, - png_uint_32 chunk_name)); - -#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED -/* Exactly as png_handle_as_unknown() except that the argument is a 32-bit chunk - * name, not a string. - */ -PNG_EXTERN int png_chunk_unknown_handling PNGARG((png_structp png_ptr, - png_uint_32 chunk_name)); -#endif - -/* Handle the transformations for reading and writing */ -#ifdef PNG_READ_TRANSFORMS_SUPPORTED -PNG_EXTERN void png_do_read_transformations PNGARG((png_structp png_ptr, - png_row_infop row_info)); -#endif -#ifdef PNG_WRITE_TRANSFORMS_SUPPORTED -PNG_EXTERN void png_do_write_transformations PNGARG((png_structp png_ptr, - png_row_infop row_info)); -#endif - -#ifdef PNG_READ_TRANSFORMS_SUPPORTED -PNG_EXTERN void png_init_read_transformations PNGARG((png_structp png_ptr)); -#endif - -#ifdef PNG_PROGRESSIVE_READ_SUPPORTED -PNG_EXTERN void png_push_read_chunk PNGARG((png_structp png_ptr, - png_infop info_ptr)); -PNG_EXTERN void png_push_read_sig PNGARG((png_structp png_ptr, - png_infop info_ptr)); -PNG_EXTERN void png_push_check_crc PNGARG((png_structp png_ptr)); -PNG_EXTERN void png_push_crc_skip PNGARG((png_structp png_ptr, - png_uint_32 length)); -PNG_EXTERN void png_push_crc_finish PNGARG((png_structp png_ptr)); -PNG_EXTERN void png_push_save_buffer PNGARG((png_structp png_ptr)); -PNG_EXTERN void png_push_restore_buffer PNGARG((png_structp png_ptr, - png_bytep buffer, png_size_t buffer_length)); -PNG_EXTERN void png_push_read_IDAT PNGARG((png_structp png_ptr)); -PNG_EXTERN void png_process_IDAT_data PNGARG((png_structp png_ptr, - png_bytep buffer, png_size_t buffer_length)); -PNG_EXTERN void png_push_process_row PNGARG((png_structp png_ptr)); -PNG_EXTERN void png_push_handle_unknown PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_32 length)); -PNG_EXTERN void png_push_have_info PNGARG((png_structp png_ptr, - png_infop info_ptr)); -PNG_EXTERN void png_push_have_end PNGARG((png_structp png_ptr, - png_infop info_ptr)); -PNG_EXTERN void png_push_have_row PNGARG((png_structp png_ptr, png_bytep row)); -PNG_EXTERN void png_push_read_end PNGARG((png_structp png_ptr, - png_infop info_ptr)); -PNG_EXTERN void png_process_some_data PNGARG((png_structp png_ptr, - png_infop info_ptr)); -PNG_EXTERN void png_read_push_finish_row PNGARG((png_structp png_ptr)); -# ifdef PNG_READ_tEXt_SUPPORTED -PNG_EXTERN void png_push_handle_tEXt PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_32 length)); -PNG_EXTERN void png_push_read_tEXt PNGARG((png_structp png_ptr, - png_infop info_ptr)); -# endif -# ifdef PNG_READ_zTXt_SUPPORTED -PNG_EXTERN void png_push_handle_zTXt PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_32 length)); -PNG_EXTERN void png_push_read_zTXt PNGARG((png_structp png_ptr, - png_infop info_ptr)); -# endif -# ifdef PNG_READ_iTXt_SUPPORTED -PNG_EXTERN void png_push_handle_iTXt PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_32 length)); -PNG_EXTERN void png_push_read_iTXt PNGARG((png_structp png_ptr, - png_infop info_ptr)); -# endif - -#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */ - -#ifdef PNG_MNG_FEATURES_SUPPORTED -PNG_EXTERN void png_do_read_intrapixel PNGARG((png_row_infop row_info, - png_bytep row)); -PNG_EXTERN void png_do_write_intrapixel PNGARG((png_row_infop row_info, - png_bytep row)); -#endif - -/* Added at libpng version 1.4.0 */ -#ifdef PNG_CHECK_cHRM_SUPPORTED -PNG_EXTERN int png_check_cHRM_fixed PNGARG((png_structp png_ptr, - png_fixed_point int_white_x, png_fixed_point int_white_y, - png_fixed_point int_red_x, png_fixed_point int_red_y, png_fixed_point - int_green_x, png_fixed_point int_green_y, png_fixed_point int_blue_x, - png_fixed_point int_blue_y)); -#endif - -#ifdef PNG_CHECK_cHRM_SUPPORTED -/* Added at libpng version 1.2.34 and 1.4.0 */ -/* Currently only used by png_check_cHRM_fixed */ -PNG_EXTERN void png_64bit_product PNGARG((long v1, long v2, - unsigned long *hi_product, unsigned long *lo_product)); -#endif - -#ifdef PNG_cHRM_SUPPORTED -/* Added at libpng version 1.5.5 */ -typedef struct png_xy -{ - png_fixed_point redx, redy; - png_fixed_point greenx, greeny; - png_fixed_point bluex, bluey; - png_fixed_point whitex, whitey; -} png_xy; - -typedef struct png_XYZ -{ - png_fixed_point redX, redY, redZ; - png_fixed_point greenX, greenY, greenZ; - png_fixed_point blueX, blueY, blueZ; -} png_XYZ; - -/* The conversion APIs return 0 on success, non-zero on a parameter error. They - * allow conversion between the above representations of a color encoding. When - * converting from XYZ end points to chromaticities the absolute magnitude of - * the end points is lost, when converting back the sum of the Y values of the - * three end points will be 1.0 - */ -PNG_EXTERN int png_xy_from_XYZ PNGARG((png_xy *xy, png_XYZ XYZ)); -PNG_EXTERN int png_XYZ_from_xy PNGARG((png_XYZ *XYZ, png_xy xy)); -PNG_EXTERN int png_XYZ_from_xy_checked PNGARG((png_structp png_ptr, - png_XYZ *XYZ, png_xy xy)); -#endif - -/* Added at libpng version 1.4.0 */ -PNG_EXTERN void png_check_IHDR PNGARG((png_structp png_ptr, - png_uint_32 width, png_uint_32 height, int bit_depth, - int color_type, int interlace_type, int compression_type, - int filter_type)); - -/* Added at libpng version 1.5.10 */ -#if defined(PNG_READ_CHECK_FOR_INVALID_INDEX_SUPPORTED) || \ - defined(PNG_WRITE_CHECK_FOR_INVALID_INDEX_SUPPORTED) -PNG_EXTERN void png_do_check_palette_indexes PNGARG((png_structp png_ptr, - png_row_infop row_info)); -#endif - -/* Free all memory used by the read (old method - NOT DLL EXPORTED) */ -PNG_EXTERN void png_read_destroy PNGARG((png_structp png_ptr, - png_infop info_ptr, png_infop end_info_ptr)); - -/* Free any memory used in png_ptr struct (old method - NOT DLL EXPORTED) */ -PNG_EXTERN void png_write_destroy PNGARG((png_structp png_ptr)); - -#ifdef USE_FAR_KEYWORD /* memory model conversion function */ -PNG_EXTERN void *png_far_to_near PNGARG((png_structp png_ptr, png_voidp ptr, - int check)); -#endif /* USE_FAR_KEYWORD */ - -#if defined(PNG_FLOATING_POINT_SUPPORTED) && defined(PNG_ERROR_TEXT_SUPPORTED) -PNG_EXTERN PNG_FUNCTION(void, png_fixed_error, (png_structp png_ptr, - png_const_charp name),PNG_NORETURN); -#endif - -/* Puts 'string' into 'buffer' at buffer[pos], taking care never to overwrite - * the end. Always leaves the buffer nul terminated. Never errors out (and - * there is no error code.) - */ -PNG_EXTERN size_t png_safecat(png_charp buffer, size_t bufsize, size_t pos, - png_const_charp string); - -/* Various internal functions to handle formatted warning messages, currently - * only implemented for warnings. - */ -#if defined(PNG_WARNINGS_SUPPORTED) || defined(PNG_TIME_RFC1123_SUPPORTED) -/* Utility to dump an unsigned value into a buffer, given a start pointer and - * and end pointer (which should point just *beyond* the end of the buffer!) - * Returns the pointer to the start of the formatted string. This utility only - * does unsigned values. - */ -PNG_EXTERN png_charp png_format_number(png_const_charp start, png_charp end, - int format, png_alloc_size_t number); - -/* Convenience macro that takes an array: */ -#define PNG_FORMAT_NUMBER(buffer,format,number) \ - png_format_number(buffer, buffer + (sizeof buffer), format, number) - -/* Suggested size for a number buffer (enough for 64 bits and a sign!) */ -#define PNG_NUMBER_BUFFER_SIZE 24 - -/* These are the integer formats currently supported, the name is formed from - * the standard printf(3) format string. - */ -#define PNG_NUMBER_FORMAT_u 1 /* chose unsigned API! */ -#define PNG_NUMBER_FORMAT_02u 2 -#define PNG_NUMBER_FORMAT_d 1 /* chose signed API! */ -#define PNG_NUMBER_FORMAT_02d 2 -#define PNG_NUMBER_FORMAT_x 3 -#define PNG_NUMBER_FORMAT_02x 4 -#define PNG_NUMBER_FORMAT_fixed 5 /* choose the signed API */ -#endif - -#ifdef PNG_WARNINGS_SUPPORTED -/* New defines and members adding in libpng-1.5.4 */ -# define PNG_WARNING_PARAMETER_SIZE 32 -# define PNG_WARNING_PARAMETER_COUNT 8 - -/* An l-value of this type has to be passed to the APIs below to cache the - * values of the parameters to a formatted warning message. - */ -typedef char png_warning_parameters[PNG_WARNING_PARAMETER_COUNT][ - PNG_WARNING_PARAMETER_SIZE]; - -PNG_EXTERN void png_warning_parameter(png_warning_parameters p, int number, - png_const_charp string); - /* Parameters are limited in size to PNG_WARNING_PARAMETER_SIZE characters, - * including the trailing '\0'. - */ -PNG_EXTERN void png_warning_parameter_unsigned(png_warning_parameters p, - int number, int format, png_alloc_size_t value); - /* Use png_alloc_size_t because it is an unsigned type as big as any we - * need to output. Use the following for a signed value. - */ -PNG_EXTERN void png_warning_parameter_signed(png_warning_parameters p, - int number, int format, png_int_32 value); - -PNG_EXTERN void png_formatted_warning(png_structp png_ptr, - png_warning_parameters p, png_const_charp message); - /* 'message' follows the X/Open approach of using @1, @2 to insert - * parameters previously supplied using the above functions. Errors in - * specifying the paramters will simple result in garbage substitutions. - */ -#endif - -/* ASCII to FP interfaces, currently only implemented if sCAL - * support is required. - */ -#if defined(PNG_READ_sCAL_SUPPORTED) -/* MAX_DIGITS is actually the maximum number of characters in an sCAL - * width or height, derived from the precision (number of significant - * digits - a build time settable option) and assumpitions about the - * maximum ridiculous exponent. - */ -#define PNG_sCAL_MAX_DIGITS (PNG_sCAL_PRECISION+1/*.*/+1/*E*/+10/*exponent*/) - -#ifdef PNG_FLOATING_POINT_SUPPORTED -PNG_EXTERN void png_ascii_from_fp PNGARG((png_structp png_ptr, png_charp ascii, - png_size_t size, double fp, unsigned int precision)); -#endif /* FLOATING_POINT */ - -#ifdef PNG_FIXED_POINT_SUPPORTED -PNG_EXTERN void png_ascii_from_fixed PNGARG((png_structp png_ptr, - png_charp ascii, png_size_t size, png_fixed_point fp)); -#endif /* FIXED_POINT */ -#endif /* READ_sCAL */ - -#if defined(PNG_sCAL_SUPPORTED) || defined(PNG_pCAL_SUPPORTED) -/* An internal API to validate the format of a floating point number. - * The result is the index of the next character. If the number is - * not valid it will be the index of a character in the supposed number. - * - * The format of a number is defined in the PNG extensions specification - * and this API is strictly conformant to that spec, not anyone elses! - * - * The format as a regular expression is: - * - * [+-]?[0-9]+.?([Ee][+-]?[0-9]+)? - * - * or: - * - * [+-]?.[0-9]+(.[0-9]+)?([Ee][+-]?[0-9]+)? - * - * The complexity is that either integer or fraction must be present and the - * fraction is permitted to have no digits only if the integer is present. - * - * NOTE: The dangling E problem. - * There is a PNG valid floating point number in the following: - * - * PNG floating point numb1.ers are not greedy. - * - * Working this out requires *TWO* character lookahead (because of the - * sign), the parser does not do this - it will fail at the 'r' - this - * doesn't matter for PNG sCAL chunk values, but it requires more care - * if the value were ever to be embedded in something more complex. Use - * ANSI-C strtod if you need the lookahead. - */ -/* State table for the parser. */ -#define PNG_FP_INTEGER 0 /* before or in integer */ -#define PNG_FP_FRACTION 1 /* before or in fraction */ -#define PNG_FP_EXPONENT 2 /* before or in exponent */ -#define PNG_FP_STATE 3 /* mask for the above */ -#define PNG_FP_SAW_SIGN 4 /* Saw +/- in current state */ -#define PNG_FP_SAW_DIGIT 8 /* Saw a digit in current state */ -#define PNG_FP_SAW_DOT 16 /* Saw a dot in current state */ -#define PNG_FP_SAW_E 32 /* Saw an E (or e) in current state */ -#define PNG_FP_SAW_ANY 60 /* Saw any of the above 4 */ - -/* These three values don't affect the parser. They are set but not used. - */ -#define PNG_FP_WAS_VALID 64 /* Preceding substring is a valid fp number */ -#define PNG_FP_NEGATIVE 128 /* A negative number, including "-0" */ -#define PNG_FP_NONZERO 256 /* A non-zero value */ -#define PNG_FP_STICKY 448 /* The above three flags */ - -/* This is available for the caller to store in 'state' if required. Do not - * call the parser after setting it (the parser sometimes clears it.) - */ -#define PNG_FP_INVALID 512 /* Available for callers as a distinct value */ - -/* Result codes for the parser (boolean - true meants ok, false means - * not ok yet.) - */ -#define PNG_FP_MAYBE 0 /* The number may be valid in the future */ -#define PNG_FP_OK 1 /* The number is valid */ - -/* Tests on the sticky non-zero and negative flags. To pass these checks - * the state must also indicate that the whole number is valid - this is - * achieved by testing PNG_FP_SAW_DIGIT (see the implementation for why this - * is equivalent to PNG_FP_OK above.) - */ -#define PNG_FP_NZ_MASK (PNG_FP_SAW_DIGIT | PNG_FP_NEGATIVE | PNG_FP_NONZERO) - /* NZ_MASK: the string is valid and a non-zero negative value */ -#define PNG_FP_Z_MASK (PNG_FP_SAW_DIGIT | PNG_FP_NONZERO) - /* Z MASK: the string is valid and a non-zero value. */ - /* PNG_FP_SAW_DIGIT: the string is valid. */ -#define PNG_FP_IS_ZERO(state) (((state) & PNG_FP_Z_MASK) == PNG_FP_SAW_DIGIT) -#define PNG_FP_IS_POSITIVE(state) (((state) & PNG_FP_NZ_MASK) == PNG_FP_Z_MASK) -#define PNG_FP_IS_NEGATIVE(state) (((state) & PNG_FP_NZ_MASK) == PNG_FP_NZ_MASK) - -/* The actual parser. This can be called repeatedly, it updates - * the index into the string and the state variable (which must - * be initialzed to 0). It returns a result code, as above. There - * is no point calling the parser any more if it fails to advance to - * the end of the string - it is stuck on an invalid character (or - * terminated by '\0'). - * - * Note that the pointer will consume an E or even an E+ then leave - * a 'maybe' state even though a preceding integer.fraction is valid. - * The PNG_FP_WAS_VALID flag indicates that a preceding substring was - * a valid number. It's possible to recover from this by calling - * the parser again (from the start, with state 0) but with a string - * that omits the last character (i.e. set the size to the index of - * the problem character.) This has not been tested within libpng. - */ -PNG_EXTERN int png_check_fp_number PNGARG((png_const_charp string, - png_size_t size, int *statep, png_size_tp whereami)); - -/* This is the same but it checks a complete string and returns true - * only if it just contains a floating point number. As of 1.5.4 this - * function also returns the state at the end of parsing the number if - * it was valid (otherwise it returns 0.) This can be used for testing - * for negative or zero values using the sticky flag. - */ -PNG_EXTERN int png_check_fp_string PNGARG((png_const_charp string, - png_size_t size)); -#endif /* pCAL || sCAL */ - -#if defined(PNG_READ_GAMMA_SUPPORTED) ||\ - defined(PNG_INCH_CONVERSIONS_SUPPORTED) || defined(PNG_READ_pHYs_SUPPORTED) -/* Added at libpng version 1.5.0 */ -/* This is a utility to provide a*times/div (rounded) and indicate - * if there is an overflow. The result is a boolean - false (0) - * for overflow, true (1) if no overflow, in which case *res - * holds the result. - */ -PNG_EXTERN int png_muldiv PNGARG((png_fixed_point_p res, png_fixed_point a, - png_int_32 multiplied_by, png_int_32 divided_by)); -#endif - -#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_INCH_CONVERSIONS_SUPPORTED) -/* Same deal, but issue a warning on overflow and return 0. */ -PNG_EXTERN png_fixed_point png_muldiv_warn PNGARG((png_structp png_ptr, - png_fixed_point a, png_int_32 multiplied_by, png_int_32 divided_by)); -#endif - -#ifdef PNG_READ_GAMMA_SUPPORTED -/* Calculate a reciprocal - used for gamma values. This returns - * 0 if the argument is 0 in order to maintain an undefined value, - * there are no warnings. - */ -PNG_EXTERN png_fixed_point png_reciprocal PNGARG((png_fixed_point a)); - -/* The same but gives a reciprocal of the product of two fixed point - * values. Accuracy is suitable for gamma calculations but this is - * not exact - use png_muldiv for that. - */ -PNG_EXTERN png_fixed_point png_reciprocal2 PNGARG((png_fixed_point a, - png_fixed_point b)); -#endif - -#ifdef PNG_READ_GAMMA_SUPPORTED -/* Internal fixed point gamma correction. These APIs are called as - * required to convert single values - they don't need to be fast, - * they are not used when processing image pixel values. - * - * While the input is an 'unsigned' value it must actually be the - * correct bit value - 0..255 or 0..65535 as required. - */ -PNG_EXTERN png_uint_16 png_gamma_correct PNGARG((png_structp png_ptr, - unsigned int value, png_fixed_point gamma_value)); -PNG_EXTERN int png_gamma_significant PNGARG((png_fixed_point gamma_value)); -PNG_EXTERN png_uint_16 png_gamma_16bit_correct PNGARG((unsigned int value, - png_fixed_point gamma_value)); -PNG_EXTERN png_byte png_gamma_8bit_correct PNGARG((unsigned int value, - png_fixed_point gamma_value)); -PNG_EXTERN void png_destroy_gamma_table(png_structp png_ptr); -PNG_EXTERN void png_build_gamma_table PNGARG((png_structp png_ptr, - int bit_depth)); -#endif - -/* Maintainer: Put new private prototypes here ^ and in libpngpf.3 */ - -#include "pngdebug.h" - -#ifdef __cplusplus -} -#endif - -#endif /* PNGPRIV_H */ diff --git a/extern/libpng/include/pngread.c b/extern/libpng/include/pngread.c deleted file mode 100644 index 1d8c6b3346..0000000000 --- a/extern/libpng/include/pngread.c +++ /dev/null @@ -1,1305 +0,0 @@ - -/* pngread.c - read a PNG file - * - * Last changed in libpng 1.5.10 [March 8, 2012] - * Copyright (c) 1998-2012 Glenn Randers-Pehrson - * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) - * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) - * - * This code is released under the libpng license. - * For conditions of distribution and use, see the disclaimer - * and license in png.h - * - * This file contains routines that an application calls directly to - * read a PNG file or stream. - */ - -#include "pngpriv.h" - -#ifdef PNG_READ_SUPPORTED - -/* Create a PNG structure for reading, and allocate any memory needed. */ -PNG_FUNCTION(png_structp,PNGAPI -png_create_read_struct,(png_const_charp user_png_ver, png_voidp error_ptr, - png_error_ptr error_fn, png_error_ptr warn_fn),PNG_ALLOCATED) -{ - -#ifdef PNG_USER_MEM_SUPPORTED - return (png_create_read_struct_2(user_png_ver, error_ptr, error_fn, - warn_fn, NULL, NULL, NULL)); -} - -/* Alternate create PNG structure for reading, and allocate any memory - * needed. - */ -PNG_FUNCTION(png_structp,PNGAPI -png_create_read_struct_2,(png_const_charp user_png_ver, png_voidp error_ptr, - png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr, - png_malloc_ptr malloc_fn, png_free_ptr free_fn),PNG_ALLOCATED) -{ -#endif /* PNG_USER_MEM_SUPPORTED */ - -#ifdef PNG_SETJMP_SUPPORTED - volatile -#endif - png_structp png_ptr; - volatile int png_cleanup_needed = 0; - -#ifdef PNG_SETJMP_SUPPORTED -#ifdef USE_FAR_KEYWORD - jmp_buf tmp_jmpbuf; -#endif -#endif - - png_debug(1, "in png_create_read_struct"); - -#ifdef PNG_USER_MEM_SUPPORTED - png_ptr = (png_structp)png_create_struct_2(PNG_STRUCT_PNG, - malloc_fn, mem_ptr); -#else - png_ptr = (png_structp)png_create_struct(PNG_STRUCT_PNG); -#endif - if (png_ptr == NULL) - return (NULL); - - /* Added at libpng-1.2.6 */ -#ifdef PNG_USER_LIMITS_SUPPORTED - png_ptr->user_width_max = PNG_USER_WIDTH_MAX; - png_ptr->user_height_max = PNG_USER_HEIGHT_MAX; - - /* Added at libpng-1.2.43 and 1.4.0 */ - png_ptr->user_chunk_cache_max = PNG_USER_CHUNK_CACHE_MAX; - - /* Added at libpng-1.2.43 and 1.4.1 */ - png_ptr->user_chunk_malloc_max = PNG_USER_CHUNK_MALLOC_MAX; -#endif - -#ifdef PNG_SETJMP_SUPPORTED -/* Applications that neglect to set up their own setjmp() and then - * encounter a png_error() will longjmp here. Since the jmpbuf is - * then meaningless we abort instead of returning. - */ -#ifdef USE_FAR_KEYWORD - if (setjmp(tmp_jmpbuf)) -#else - if (setjmp(png_jmpbuf(png_ptr))) /* Sets longjmp to match setjmp */ -#endif - PNG_ABORT(); -#ifdef USE_FAR_KEYWORD - png_memcpy(png_jmpbuf(png_ptr), tmp_jmpbuf, png_sizeof(jmp_buf)); -#endif -#endif /* PNG_SETJMP_SUPPORTED */ - -#ifdef PNG_USER_MEM_SUPPORTED - png_set_mem_fn(png_ptr, mem_ptr, malloc_fn, free_fn); -#endif - - png_set_error_fn(png_ptr, error_ptr, error_fn, warn_fn); - - /* Call the general version checker (shared with read and write code): */ - if (!png_user_version_check(png_ptr, user_png_ver)) - png_cleanup_needed = 1; - - if (!png_cleanup_needed) - { - /* Initialize zbuf - compression buffer */ - png_ptr->zbuf_size = PNG_ZBUF_SIZE; - png_ptr->zbuf = (png_bytep)png_malloc_warn(png_ptr, png_ptr->zbuf_size); - - if (png_ptr->zbuf == NULL) - png_cleanup_needed = 1; - } - - png_ptr->zstream.zalloc = png_zalloc; - png_ptr->zstream.zfree = png_zfree; - png_ptr->zstream.opaque = (voidpf)png_ptr; - - if (!png_cleanup_needed) - { - switch (inflateInit(&png_ptr->zstream)) - { - case Z_OK: - break; /* Do nothing */ - - case Z_MEM_ERROR: - png_warning(png_ptr, "zlib memory error"); - png_cleanup_needed = 1; - break; - - case Z_STREAM_ERROR: - png_warning(png_ptr, "zlib stream error"); - png_cleanup_needed = 1; - break; - - case Z_VERSION_ERROR: - png_warning(png_ptr, "zlib version error"); - png_cleanup_needed = 1; - break; - - default: png_warning(png_ptr, "Unknown zlib error"); - png_cleanup_needed = 1; - } - } - - if (png_cleanup_needed) - { - /* Clean up PNG structure and deallocate any memory. */ - png_free(png_ptr, png_ptr->zbuf); - png_ptr->zbuf = NULL; -#ifdef PNG_USER_MEM_SUPPORTED - png_destroy_struct_2((png_voidp)png_ptr, - (png_free_ptr)free_fn, (png_voidp)mem_ptr); -#else - png_destroy_struct((png_voidp)png_ptr); -#endif - return (NULL); - } - - png_ptr->zstream.next_out = png_ptr->zbuf; - png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; - - png_set_read_fn(png_ptr, NULL, NULL); - - - return (png_ptr); -} - - -#ifdef PNG_SEQUENTIAL_READ_SUPPORTED -/* Read the information before the actual image data. This has been - * changed in v0.90 to allow reading a file that already has the magic - * bytes read from the stream. You can tell libpng how many bytes have - * been read from the beginning of the stream (up to the maximum of 8) - * via png_set_sig_bytes(), and we will only check the remaining bytes - * here. The application can then have access to the signature bytes we - * read if it is determined that this isn't a valid PNG file. - */ -void PNGAPI -png_read_info(png_structp png_ptr, png_infop info_ptr) -{ - png_debug(1, "in png_read_info"); - - if (png_ptr == NULL || info_ptr == NULL) - return; - - /* Read and check the PNG file signature. */ - png_read_sig(png_ptr, info_ptr); - - for (;;) - { - png_uint_32 length = png_read_chunk_header(png_ptr); - png_uint_32 chunk_name = png_ptr->chunk_name; - - /* This should be a binary subdivision search or a hash for - * matching the chunk name rather than a linear search. - */ - if (chunk_name == png_IDAT) - if (png_ptr->mode & PNG_AFTER_IDAT) - png_ptr->mode |= PNG_HAVE_CHUNK_AFTER_IDAT; - - if (chunk_name == png_IHDR) - png_handle_IHDR(png_ptr, info_ptr, length); - - else if (chunk_name == png_IEND) - png_handle_IEND(png_ptr, info_ptr, length); - -#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED - else if (png_chunk_unknown_handling(png_ptr, chunk_name) != - PNG_HANDLE_CHUNK_AS_DEFAULT) - { - if (chunk_name == png_IDAT) - png_ptr->mode |= PNG_HAVE_IDAT; - - png_handle_unknown(png_ptr, info_ptr, length); - - if (chunk_name == png_PLTE) - png_ptr->mode |= PNG_HAVE_PLTE; - - else if (chunk_name == png_IDAT) - { - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before IDAT"); - - else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE && - !(png_ptr->mode & PNG_HAVE_PLTE)) - png_error(png_ptr, "Missing PLTE before IDAT"); - - break; - } - } -#endif - else if (chunk_name == png_PLTE) - png_handle_PLTE(png_ptr, info_ptr, length); - - else if (chunk_name == png_IDAT) - { - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before IDAT"); - - else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE && - !(png_ptr->mode & PNG_HAVE_PLTE)) - png_error(png_ptr, "Missing PLTE before IDAT"); - - png_ptr->idat_size = length; - png_ptr->mode |= PNG_HAVE_IDAT; - break; - } - -#ifdef PNG_READ_bKGD_SUPPORTED - else if (chunk_name == png_bKGD) - png_handle_bKGD(png_ptr, info_ptr, length); -#endif - -#ifdef PNG_READ_cHRM_SUPPORTED - else if (chunk_name == png_cHRM) - png_handle_cHRM(png_ptr, info_ptr, length); -#endif - -#ifdef PNG_READ_gAMA_SUPPORTED - else if (chunk_name == png_gAMA) - png_handle_gAMA(png_ptr, info_ptr, length); -#endif - -#ifdef PNG_READ_hIST_SUPPORTED - else if (chunk_name == png_hIST) - png_handle_hIST(png_ptr, info_ptr, length); -#endif - -#ifdef PNG_READ_oFFs_SUPPORTED - else if (chunk_name == png_oFFs) - png_handle_oFFs(png_ptr, info_ptr, length); -#endif - -#ifdef PNG_READ_pCAL_SUPPORTED - else if (chunk_name == png_pCAL) - png_handle_pCAL(png_ptr, info_ptr, length); -#endif - -#ifdef PNG_READ_sCAL_SUPPORTED - else if (chunk_name == png_sCAL) - png_handle_sCAL(png_ptr, info_ptr, length); -#endif - -#ifdef PNG_READ_pHYs_SUPPORTED - else if (chunk_name == png_pHYs) - png_handle_pHYs(png_ptr, info_ptr, length); -#endif - -#ifdef PNG_READ_sBIT_SUPPORTED - else if (chunk_name == png_sBIT) - png_handle_sBIT(png_ptr, info_ptr, length); -#endif - -#ifdef PNG_READ_sRGB_SUPPORTED - else if (chunk_name == png_sRGB) - png_handle_sRGB(png_ptr, info_ptr, length); -#endif - -#ifdef PNG_READ_iCCP_SUPPORTED - else if (chunk_name == png_iCCP) - png_handle_iCCP(png_ptr, info_ptr, length); -#endif - -#ifdef PNG_READ_sPLT_SUPPORTED - else if (chunk_name == png_sPLT) - png_handle_sPLT(png_ptr, info_ptr, length); -#endif - -#ifdef PNG_READ_tEXt_SUPPORTED - else if (chunk_name == png_tEXt) - png_handle_tEXt(png_ptr, info_ptr, length); -#endif - -#ifdef PNG_READ_tIME_SUPPORTED - else if (chunk_name == png_tIME) - png_handle_tIME(png_ptr, info_ptr, length); -#endif - -#ifdef PNG_READ_tRNS_SUPPORTED - else if (chunk_name == png_tRNS) - png_handle_tRNS(png_ptr, info_ptr, length); -#endif - -#ifdef PNG_READ_zTXt_SUPPORTED - else if (chunk_name == png_zTXt) - png_handle_zTXt(png_ptr, info_ptr, length); -#endif - -#ifdef PNG_READ_iTXt_SUPPORTED - else if (chunk_name == png_iTXt) - png_handle_iTXt(png_ptr, info_ptr, length); -#endif - - else - png_handle_unknown(png_ptr, info_ptr, length); - } -} -#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */ - -/* Optional call to update the users info_ptr structure */ -void PNGAPI -png_read_update_info(png_structp png_ptr, png_infop info_ptr) -{ - png_debug(1, "in png_read_update_info"); - - if (png_ptr == NULL) - return; - - png_read_start_row(png_ptr); - -#ifdef PNG_READ_TRANSFORMS_SUPPORTED - png_read_transform_info(png_ptr, info_ptr); -#else - PNG_UNUSED(info_ptr) -#endif -} - -#ifdef PNG_SEQUENTIAL_READ_SUPPORTED -/* Initialize palette, background, etc, after transformations - * are set, but before any reading takes place. This allows - * the user to obtain a gamma-corrected palette, for example. - * If the user doesn't call this, we will do it ourselves. - */ -void PNGAPI -png_start_read_image(png_structp png_ptr) -{ - png_debug(1, "in png_start_read_image"); - - if (png_ptr != NULL) - png_read_start_row(png_ptr); -} -#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */ - -#ifdef PNG_SEQUENTIAL_READ_SUPPORTED -void PNGAPI -png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row) -{ - int ret; - - png_row_info row_info; - - if (png_ptr == NULL) - return; - - png_debug2(1, "in png_read_row (row %lu, pass %d)", - (unsigned long)png_ptr->row_number, png_ptr->pass); - - /* png_read_start_row sets the information (in particular iwidth) for this - * interlace pass. - */ - if (!(png_ptr->flags & PNG_FLAG_ROW_INIT)) - png_read_start_row(png_ptr); - - /* 1.5.6: row_info moved out of png_struct to a local here. */ - row_info.width = png_ptr->iwidth; /* NOTE: width of current interlaced row */ - row_info.color_type = png_ptr->color_type; - row_info.bit_depth = png_ptr->bit_depth; - row_info.channels = png_ptr->channels; - row_info.pixel_depth = png_ptr->pixel_depth; - row_info.rowbytes = PNG_ROWBYTES(row_info.pixel_depth, row_info.width); - - if (png_ptr->row_number == 0 && png_ptr->pass == 0) - { - /* Check for transforms that have been set but were defined out */ -#if defined(PNG_WRITE_INVERT_SUPPORTED) && !defined(PNG_READ_INVERT_SUPPORTED) - if (png_ptr->transformations & PNG_INVERT_MONO) - png_warning(png_ptr, "PNG_READ_INVERT_SUPPORTED is not defined"); -#endif - -#if defined(PNG_WRITE_FILLER_SUPPORTED) && !defined(PNG_READ_FILLER_SUPPORTED) - if (png_ptr->transformations & PNG_FILLER) - png_warning(png_ptr, "PNG_READ_FILLER_SUPPORTED is not defined"); -#endif - -#if defined(PNG_WRITE_PACKSWAP_SUPPORTED) && \ - !defined(PNG_READ_PACKSWAP_SUPPORTED) - if (png_ptr->transformations & PNG_PACKSWAP) - png_warning(png_ptr, "PNG_READ_PACKSWAP_SUPPORTED is not defined"); -#endif - -#if defined(PNG_WRITE_PACK_SUPPORTED) && !defined(PNG_READ_PACK_SUPPORTED) - if (png_ptr->transformations & PNG_PACK) - png_warning(png_ptr, "PNG_READ_PACK_SUPPORTED is not defined"); -#endif - -#if defined(PNG_WRITE_SHIFT_SUPPORTED) && !defined(PNG_READ_SHIFT_SUPPORTED) - if (png_ptr->transformations & PNG_SHIFT) - png_warning(png_ptr, "PNG_READ_SHIFT_SUPPORTED is not defined"); -#endif - -#if defined(PNG_WRITE_BGR_SUPPORTED) && !defined(PNG_READ_BGR_SUPPORTED) - if (png_ptr->transformations & PNG_BGR) - png_warning(png_ptr, "PNG_READ_BGR_SUPPORTED is not defined"); -#endif - -#if defined(PNG_WRITE_SWAP_SUPPORTED) && !defined(PNG_READ_SWAP_SUPPORTED) - if (png_ptr->transformations & PNG_SWAP_BYTES) - png_warning(png_ptr, "PNG_READ_SWAP_SUPPORTED is not defined"); -#endif - } - -#ifdef PNG_READ_INTERLACING_SUPPORTED - /* If interlaced and we do not need a new row, combine row and return. - * Notice that the pixels we have from previous rows have been transformed - * already; we can only combine like with like (transformed or - * untransformed) and, because of the libpng API for interlaced images, this - * means we must transform before de-interlacing. - */ - if (png_ptr->interlaced && (png_ptr->transformations & PNG_INTERLACE)) - { - switch (png_ptr->pass) - { - case 0: - if (png_ptr->row_number & 0x07) - { - if (dsp_row != NULL) - png_combine_row(png_ptr, dsp_row, 1/*display*/); - png_read_finish_row(png_ptr); - return; - } - break; - - case 1: - if ((png_ptr->row_number & 0x07) || png_ptr->width < 5) - { - if (dsp_row != NULL) - png_combine_row(png_ptr, dsp_row, 1/*display*/); - - png_read_finish_row(png_ptr); - return; - } - break; - - case 2: - if ((png_ptr->row_number & 0x07) != 4) - { - if (dsp_row != NULL && (png_ptr->row_number & 4)) - png_combine_row(png_ptr, dsp_row, 1/*display*/); - - png_read_finish_row(png_ptr); - return; - } - break; - - case 3: - if ((png_ptr->row_number & 3) || png_ptr->width < 3) - { - if (dsp_row != NULL) - png_combine_row(png_ptr, dsp_row, 1/*display*/); - - png_read_finish_row(png_ptr); - return; - } - break; - - case 4: - if ((png_ptr->row_number & 3) != 2) - { - if (dsp_row != NULL && (png_ptr->row_number & 2)) - png_combine_row(png_ptr, dsp_row, 1/*display*/); - - png_read_finish_row(png_ptr); - return; - } - break; - case 5: - if ((png_ptr->row_number & 1) || png_ptr->width < 2) - { - if (dsp_row != NULL) - png_combine_row(png_ptr, dsp_row, 1/*display*/); - - png_read_finish_row(png_ptr); - return; - } - break; - - default: - case 6: - if (!(png_ptr->row_number & 1)) - { - png_read_finish_row(png_ptr); - return; - } - break; - } - } -#endif - - if (!(png_ptr->mode & PNG_HAVE_IDAT)) - png_error(png_ptr, "Invalid attempt to read row data"); - - png_ptr->zstream.next_out = png_ptr->row_buf; - png_ptr->zstream.avail_out = - (uInt)(PNG_ROWBYTES(png_ptr->pixel_depth, - png_ptr->iwidth) + 1); - - do - { - if (!(png_ptr->zstream.avail_in)) - { - while (!png_ptr->idat_size) - { - png_crc_finish(png_ptr, 0); - - png_ptr->idat_size = png_read_chunk_header(png_ptr); - if (png_ptr->chunk_name != png_IDAT) - png_error(png_ptr, "Not enough image data"); - } - png_ptr->zstream.avail_in = (uInt)png_ptr->zbuf_size; - png_ptr->zstream.next_in = png_ptr->zbuf; - if (png_ptr->zbuf_size > png_ptr->idat_size) - png_ptr->zstream.avail_in = (uInt)png_ptr->idat_size; - png_crc_read(png_ptr, png_ptr->zbuf, - (png_size_t)png_ptr->zstream.avail_in); - png_ptr->idat_size -= png_ptr->zstream.avail_in; - } - - ret = inflate(&png_ptr->zstream, Z_PARTIAL_FLUSH); - - if (ret == Z_STREAM_END) - { - if (png_ptr->zstream.avail_out || png_ptr->zstream.avail_in || - png_ptr->idat_size) - png_benign_error(png_ptr, "Extra compressed data"); - png_ptr->mode |= PNG_AFTER_IDAT; - png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED; - break; - } - - if (ret != Z_OK) - png_error(png_ptr, png_ptr->zstream.msg ? png_ptr->zstream.msg : - "Decompression error"); - - } while (png_ptr->zstream.avail_out); - - if (png_ptr->row_buf[0] > PNG_FILTER_VALUE_NONE) - { - if (png_ptr->row_buf[0] < PNG_FILTER_VALUE_LAST) - png_read_filter_row(png_ptr, &row_info, png_ptr->row_buf + 1, - png_ptr->prev_row + 1, png_ptr->row_buf[0]); - else - png_error(png_ptr, "bad adaptive filter value"); - } - - /* libpng 1.5.6: the following line was copying png_ptr->rowbytes before - * 1.5.6, while the buffer really is this big in current versions of libpng - * it may not be in the future, so this was changed just to copy the - * interlaced count: - */ - png_memcpy(png_ptr->prev_row, png_ptr->row_buf, row_info.rowbytes + 1); - -#ifdef PNG_MNG_FEATURES_SUPPORTED - if ((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) && - (png_ptr->filter_type == PNG_INTRAPIXEL_DIFFERENCING)) - { - /* Intrapixel differencing */ - png_do_read_intrapixel(&row_info, png_ptr->row_buf + 1); - } -#endif - - -#ifdef PNG_READ_TRANSFORMS_SUPPORTED - if (png_ptr->transformations) - png_do_read_transformations(png_ptr, &row_info); -#endif - - /* The transformed pixel depth should match the depth now in row_info. */ - if (png_ptr->transformed_pixel_depth == 0) - { - png_ptr->transformed_pixel_depth = row_info.pixel_depth; - if (row_info.pixel_depth > png_ptr->maximum_pixel_depth) - png_error(png_ptr, "sequential row overflow"); - } - - else if (png_ptr->transformed_pixel_depth != row_info.pixel_depth) - png_error(png_ptr, "internal sequential row size calculation error"); - -#ifdef PNG_READ_INTERLACING_SUPPORTED - /* Blow up interlaced rows to full size */ - if (png_ptr->interlaced && - (png_ptr->transformations & PNG_INTERLACE)) - { - if (png_ptr->pass < 6) - png_do_read_interlace(&row_info, png_ptr->row_buf + 1, png_ptr->pass, - png_ptr->transformations); - - if (dsp_row != NULL) - png_combine_row(png_ptr, dsp_row, 1/*display*/); - - if (row != NULL) - png_combine_row(png_ptr, row, 0/*row*/); - } - - else -#endif - { - if (row != NULL) - png_combine_row(png_ptr, row, -1/*ignored*/); - - if (dsp_row != NULL) - png_combine_row(png_ptr, dsp_row, -1/*ignored*/); - } - png_read_finish_row(png_ptr); - - if (png_ptr->read_row_fn != NULL) - (*(png_ptr->read_row_fn))(png_ptr, png_ptr->row_number, png_ptr->pass); -} -#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */ - -#ifdef PNG_SEQUENTIAL_READ_SUPPORTED -/* Read one or more rows of image data. If the image is interlaced, - * and png_set_interlace_handling() has been called, the rows need to - * contain the contents of the rows from the previous pass. If the - * image has alpha or transparency, and png_handle_alpha()[*] has been - * called, the rows contents must be initialized to the contents of the - * screen. - * - * "row" holds the actual image, and pixels are placed in it - * as they arrive. If the image is displayed after each pass, it will - * appear to "sparkle" in. "display_row" can be used to display a - * "chunky" progressive image, with finer detail added as it becomes - * available. If you do not want this "chunky" display, you may pass - * NULL for display_row. If you do not want the sparkle display, and - * you have not called png_handle_alpha(), you may pass NULL for rows. - * If you have called png_handle_alpha(), and the image has either an - * alpha channel or a transparency chunk, you must provide a buffer for - * rows. In this case, you do not have to provide a display_row buffer - * also, but you may. If the image is not interlaced, or if you have - * not called png_set_interlace_handling(), the display_row buffer will - * be ignored, so pass NULL to it. - * - * [*] png_handle_alpha() does not exist yet, as of this version of libpng - */ - -void PNGAPI -png_read_rows(png_structp png_ptr, png_bytepp row, - png_bytepp display_row, png_uint_32 num_rows) -{ - png_uint_32 i; - png_bytepp rp; - png_bytepp dp; - - png_debug(1, "in png_read_rows"); - - if (png_ptr == NULL) - return; - - rp = row; - dp = display_row; - if (rp != NULL && dp != NULL) - for (i = 0; i < num_rows; i++) - { - png_bytep rptr = *rp++; - png_bytep dptr = *dp++; - - png_read_row(png_ptr, rptr, dptr); - } - - else if (rp != NULL) - for (i = 0; i < num_rows; i++) - { - png_bytep rptr = *rp; - png_read_row(png_ptr, rptr, NULL); - rp++; - } - - else if (dp != NULL) - for (i = 0; i < num_rows; i++) - { - png_bytep dptr = *dp; - png_read_row(png_ptr, NULL, dptr); - dp++; - } -} -#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */ - -#ifdef PNG_SEQUENTIAL_READ_SUPPORTED -/* Read the entire image. If the image has an alpha channel or a tRNS - * chunk, and you have called png_handle_alpha()[*], you will need to - * initialize the image to the current image that PNG will be overlaying. - * We set the num_rows again here, in case it was incorrectly set in - * png_read_start_row() by a call to png_read_update_info() or - * png_start_read_image() if png_set_interlace_handling() wasn't called - * prior to either of these functions like it should have been. You can - * only call this function once. If you desire to have an image for - * each pass of a interlaced image, use png_read_rows() instead. - * - * [*] png_handle_alpha() does not exist yet, as of this version of libpng - */ -void PNGAPI -png_read_image(png_structp png_ptr, png_bytepp image) -{ - png_uint_32 i, image_height; - int pass, j; - png_bytepp rp; - - png_debug(1, "in png_read_image"); - - if (png_ptr == NULL) - return; - -#ifdef PNG_READ_INTERLACING_SUPPORTED - if (!(png_ptr->flags & PNG_FLAG_ROW_INIT)) - { - pass = png_set_interlace_handling(png_ptr); - /* And make sure transforms are initialized. */ - png_start_read_image(png_ptr); - } - else - { - if (png_ptr->interlaced && !(png_ptr->transformations & PNG_INTERLACE)) - { - /* Caller called png_start_read_image or png_read_update_info without - * first turning on the PNG_INTERLACE transform. We can fix this here, - * but the caller should do it! - */ - png_warning(png_ptr, "Interlace handling should be turned on when " - "using png_read_image"); - /* Make sure this is set correctly */ - png_ptr->num_rows = png_ptr->height; - } - - /* Obtain the pass number, which also turns on the PNG_INTERLACE flag in - * the above error case. - */ - pass = png_set_interlace_handling(png_ptr); - } -#else - if (png_ptr->interlaced) - png_error(png_ptr, - "Cannot read interlaced image -- interlace handler disabled"); - - pass = 1; -#endif - - image_height=png_ptr->height; - - for (j = 0; j < pass; j++) - { - rp = image; - for (i = 0; i < image_height; i++) - { - png_read_row(png_ptr, *rp, NULL); - rp++; - } - } -} -#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */ - -#ifdef PNG_SEQUENTIAL_READ_SUPPORTED -/* Read the end of the PNG file. Will not read past the end of the - * file, will verify the end is accurate, and will read any comments - * or time information at the end of the file, if info is not NULL. - */ -void PNGAPI -png_read_end(png_structp png_ptr, png_infop info_ptr) -{ - png_debug(1, "in png_read_end"); - - if (png_ptr == NULL) - return; - - png_crc_finish(png_ptr, 0); /* Finish off CRC from last IDAT chunk */ - -#ifdef PNG_READ_CHECK_FOR_INVALID_INDEX_SUPPORTED - /* Report invalid palette index; added at libng-1.5.10 */ - if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE && - png_ptr->num_palette_max > png_ptr->num_palette) - png_benign_error(png_ptr, "Read palette index exceeding num_palette"); -#endif - - do - { - png_uint_32 length = png_read_chunk_header(png_ptr); - png_uint_32 chunk_name = png_ptr->chunk_name; - - if (chunk_name == png_IHDR) - png_handle_IHDR(png_ptr, info_ptr, length); - - else if (chunk_name == png_IEND) - png_handle_IEND(png_ptr, info_ptr, length); - -#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED - else if (png_chunk_unknown_handling(png_ptr, chunk_name) != - PNG_HANDLE_CHUNK_AS_DEFAULT) - { - if (chunk_name == png_IDAT) - { - if ((length > 0) || (png_ptr->mode & PNG_HAVE_CHUNK_AFTER_IDAT)) - png_benign_error(png_ptr, "Too many IDATs found"); - } - png_handle_unknown(png_ptr, info_ptr, length); - if (chunk_name == png_PLTE) - png_ptr->mode |= PNG_HAVE_PLTE; - } -#endif - - else if (chunk_name == png_IDAT) - { - /* Zero length IDATs are legal after the last IDAT has been - * read, but not after other chunks have been read. - */ - if ((length > 0) || (png_ptr->mode & PNG_HAVE_CHUNK_AFTER_IDAT)) - png_benign_error(png_ptr, "Too many IDATs found"); - - png_crc_finish(png_ptr, length); - } - else if (chunk_name == png_PLTE) - png_handle_PLTE(png_ptr, info_ptr, length); - -#ifdef PNG_READ_bKGD_SUPPORTED - else if (chunk_name == png_bKGD) - png_handle_bKGD(png_ptr, info_ptr, length); -#endif - -#ifdef PNG_READ_cHRM_SUPPORTED - else if (chunk_name == png_cHRM) - png_handle_cHRM(png_ptr, info_ptr, length); -#endif - -#ifdef PNG_READ_gAMA_SUPPORTED - else if (chunk_name == png_gAMA) - png_handle_gAMA(png_ptr, info_ptr, length); -#endif - -#ifdef PNG_READ_hIST_SUPPORTED - else if (chunk_name == png_hIST) - png_handle_hIST(png_ptr, info_ptr, length); -#endif - -#ifdef PNG_READ_oFFs_SUPPORTED - else if (chunk_name == png_oFFs) - png_handle_oFFs(png_ptr, info_ptr, length); -#endif - -#ifdef PNG_READ_pCAL_SUPPORTED - else if (chunk_name == png_pCAL) - png_handle_pCAL(png_ptr, info_ptr, length); -#endif - -#ifdef PNG_READ_sCAL_SUPPORTED - else if (chunk_name == png_sCAL) - png_handle_sCAL(png_ptr, info_ptr, length); -#endif - -#ifdef PNG_READ_pHYs_SUPPORTED - else if (chunk_name == png_pHYs) - png_handle_pHYs(png_ptr, info_ptr, length); -#endif - -#ifdef PNG_READ_sBIT_SUPPORTED - else if (chunk_name == png_sBIT) - png_handle_sBIT(png_ptr, info_ptr, length); -#endif - -#ifdef PNG_READ_sRGB_SUPPORTED - else if (chunk_name == png_sRGB) - png_handle_sRGB(png_ptr, info_ptr, length); -#endif - -#ifdef PNG_READ_iCCP_SUPPORTED - else if (chunk_name == png_iCCP) - png_handle_iCCP(png_ptr, info_ptr, length); -#endif - -#ifdef PNG_READ_sPLT_SUPPORTED - else if (chunk_name == png_sPLT) - png_handle_sPLT(png_ptr, info_ptr, length); -#endif - -#ifdef PNG_READ_tEXt_SUPPORTED - else if (chunk_name == png_tEXt) - png_handle_tEXt(png_ptr, info_ptr, length); -#endif - -#ifdef PNG_READ_tIME_SUPPORTED - else if (chunk_name == png_tIME) - png_handle_tIME(png_ptr, info_ptr, length); -#endif - -#ifdef PNG_READ_tRNS_SUPPORTED - else if (chunk_name == png_tRNS) - png_handle_tRNS(png_ptr, info_ptr, length); -#endif - -#ifdef PNG_READ_zTXt_SUPPORTED - else if (chunk_name == png_zTXt) - png_handle_zTXt(png_ptr, info_ptr, length); -#endif - -#ifdef PNG_READ_iTXt_SUPPORTED - else if (chunk_name == png_iTXt) - png_handle_iTXt(png_ptr, info_ptr, length); -#endif - - else - png_handle_unknown(png_ptr, info_ptr, length); - } while (!(png_ptr->mode & PNG_HAVE_IEND)); -} -#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */ - -/* Free all memory used by the read */ -void PNGAPI -png_destroy_read_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr, - png_infopp end_info_ptr_ptr) -{ - png_structp png_ptr = NULL; - png_infop info_ptr = NULL, end_info_ptr = NULL; -#ifdef PNG_USER_MEM_SUPPORTED - png_free_ptr free_fn = NULL; - png_voidp mem_ptr = NULL; -#endif - - png_debug(1, "in png_destroy_read_struct"); - - if (png_ptr_ptr != NULL) - png_ptr = *png_ptr_ptr; - if (png_ptr == NULL) - return; - -#ifdef PNG_USER_MEM_SUPPORTED - free_fn = png_ptr->free_fn; - mem_ptr = png_ptr->mem_ptr; -#endif - - if (info_ptr_ptr != NULL) - info_ptr = *info_ptr_ptr; - - if (end_info_ptr_ptr != NULL) - end_info_ptr = *end_info_ptr_ptr; - - png_read_destroy(png_ptr, info_ptr, end_info_ptr); - - if (info_ptr != NULL) - { -#ifdef PNG_TEXT_SUPPORTED - png_free_data(png_ptr, info_ptr, PNG_FREE_TEXT, -1); -#endif - -#ifdef PNG_USER_MEM_SUPPORTED - png_destroy_struct_2((png_voidp)info_ptr, (png_free_ptr)free_fn, - (png_voidp)mem_ptr); -#else - png_destroy_struct((png_voidp)info_ptr); -#endif - *info_ptr_ptr = NULL; - } - - if (end_info_ptr != NULL) - { -#ifdef PNG_READ_TEXT_SUPPORTED - png_free_data(png_ptr, end_info_ptr, PNG_FREE_TEXT, -1); -#endif -#ifdef PNG_USER_MEM_SUPPORTED - png_destroy_struct_2((png_voidp)end_info_ptr, (png_free_ptr)free_fn, - (png_voidp)mem_ptr); -#else - png_destroy_struct((png_voidp)end_info_ptr); -#endif - *end_info_ptr_ptr = NULL; - } - - if (png_ptr != NULL) - { -#ifdef PNG_USER_MEM_SUPPORTED - png_destroy_struct_2((png_voidp)png_ptr, (png_free_ptr)free_fn, - (png_voidp)mem_ptr); -#else - png_destroy_struct((png_voidp)png_ptr); -#endif - *png_ptr_ptr = NULL; - } -} - -/* Free all memory used by the read (old method) */ -void /* PRIVATE */ -png_read_destroy(png_structp png_ptr, png_infop info_ptr, - png_infop end_info_ptr) -{ -#ifdef PNG_SETJMP_SUPPORTED - jmp_buf tmp_jmp; -#endif - png_error_ptr error_fn; -#ifdef PNG_WARNINGS_SUPPORTED - png_error_ptr warning_fn; -#endif - png_voidp error_ptr; -#ifdef PNG_USER_MEM_SUPPORTED - png_free_ptr free_fn; -#endif - - png_debug(1, "in png_read_destroy"); - - if (info_ptr != NULL) - png_info_destroy(png_ptr, info_ptr); - - if (end_info_ptr != NULL) - png_info_destroy(png_ptr, end_info_ptr); - -#ifdef PNG_READ_GAMMA_SUPPORTED - png_destroy_gamma_table(png_ptr); -#endif - - png_free(png_ptr, png_ptr->zbuf); - png_free(png_ptr, png_ptr->big_row_buf); - png_free(png_ptr, png_ptr->big_prev_row); - png_free(png_ptr, png_ptr->chunkdata); - -#ifdef PNG_READ_QUANTIZE_SUPPORTED - png_free(png_ptr, png_ptr->palette_lookup); - png_free(png_ptr, png_ptr->quantize_index); -#endif - - if (png_ptr->free_me & PNG_FREE_PLTE) - png_zfree(png_ptr, png_ptr->palette); - png_ptr->free_me &= ~PNG_FREE_PLTE; - -#if defined(PNG_tRNS_SUPPORTED) || \ - defined(PNG_READ_EXPAND_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) - if (png_ptr->free_me & PNG_FREE_TRNS) - png_free(png_ptr, png_ptr->trans_alpha); - png_ptr->free_me &= ~PNG_FREE_TRNS; -#endif - -#ifdef PNG_READ_hIST_SUPPORTED - if (png_ptr->free_me & PNG_FREE_HIST) - png_free(png_ptr, png_ptr->hist); - png_ptr->free_me &= ~PNG_FREE_HIST; -#endif - - inflateEnd(&png_ptr->zstream); - -#ifdef PNG_PROGRESSIVE_READ_SUPPORTED - png_free(png_ptr, png_ptr->save_buffer); -#endif - - /* Save the important info out of the png_struct, in case it is - * being used again. - */ -#ifdef PNG_SETJMP_SUPPORTED - png_memcpy(tmp_jmp, png_ptr->longjmp_buffer, png_sizeof(jmp_buf)); -#endif - - error_fn = png_ptr->error_fn; -#ifdef PNG_WARNINGS_SUPPORTED - warning_fn = png_ptr->warning_fn; -#endif - error_ptr = png_ptr->error_ptr; -#ifdef PNG_USER_MEM_SUPPORTED - free_fn = png_ptr->free_fn; -#endif - - png_memset(png_ptr, 0, png_sizeof(png_struct)); - - png_ptr->error_fn = error_fn; -#ifdef PNG_WARNINGS_SUPPORTED - png_ptr->warning_fn = warning_fn; -#endif - png_ptr->error_ptr = error_ptr; -#ifdef PNG_USER_MEM_SUPPORTED - png_ptr->free_fn = free_fn; -#endif - -#ifdef PNG_SETJMP_SUPPORTED - png_memcpy(png_ptr->longjmp_buffer, tmp_jmp, png_sizeof(jmp_buf)); -#endif - -} - -void PNGAPI -png_set_read_status_fn(png_structp png_ptr, png_read_status_ptr read_row_fn) -{ - if (png_ptr == NULL) - return; - - png_ptr->read_row_fn = read_row_fn; -} - - -#ifdef PNG_SEQUENTIAL_READ_SUPPORTED -#ifdef PNG_INFO_IMAGE_SUPPORTED -void PNGAPI -png_read_png(png_structp png_ptr, png_infop info_ptr, - int transforms, - voidp params) -{ - int row; - - if (png_ptr == NULL || info_ptr == NULL) - return; - - /* png_read_info() gives us all of the information from the - * PNG file before the first IDAT (image data chunk). - */ - png_read_info(png_ptr, info_ptr); - if (info_ptr->height > PNG_UINT_32_MAX/png_sizeof(png_bytep)) - png_error(png_ptr, "Image is too high to process with png_read_png()"); - - /* -------------- image transformations start here ------------------- */ - -#ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED - /* Tell libpng to strip 16-bit/color files down to 8 bits per color. - */ - if (transforms & PNG_TRANSFORM_SCALE_16) - { - /* Added at libpng-1.5.4. "strip_16" produces the same result that it - * did in earlier versions, while "scale_16" is now more accurate. - */ - png_set_scale_16(png_ptr); - } -#endif - -#ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED - /* If both SCALE and STRIP are required pngrtran will effectively cancel the - * latter by doing SCALE first. This is ok and allows apps not to check for - * which is supported to get the right answer. - */ - if (transforms & PNG_TRANSFORM_STRIP_16) - png_set_strip_16(png_ptr); -#endif - -#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED - /* Strip alpha bytes from the input data without combining with - * the background (not recommended). - */ - if (transforms & PNG_TRANSFORM_STRIP_ALPHA) - png_set_strip_alpha(png_ptr); -#endif - -#if defined(PNG_READ_PACK_SUPPORTED) && !defined(PNG_READ_EXPAND_SUPPORTED) - /* Extract multiple pixels with bit depths of 1, 2, or 4 from a single - * byte into separate bytes (useful for paletted and grayscale images). - */ - if (transforms & PNG_TRANSFORM_PACKING) - png_set_packing(png_ptr); -#endif - -#ifdef PNG_READ_PACKSWAP_SUPPORTED - /* Change the order of packed pixels to least significant bit first - * (not useful if you are using png_set_packing). - */ - if (transforms & PNG_TRANSFORM_PACKSWAP) - png_set_packswap(png_ptr); -#endif - -#ifdef PNG_READ_EXPAND_SUPPORTED - /* Expand paletted colors into true RGB triplets - * Expand grayscale images to full 8 bits from 1, 2, or 4 bits/pixel - * Expand paletted or RGB images with transparency to full alpha - * channels so the data will be available as RGBA quartets. - */ - if (transforms & PNG_TRANSFORM_EXPAND) - if ((png_ptr->bit_depth < 8) || - (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) || - (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS))) - png_set_expand(png_ptr); -#endif - - /* We don't handle background color or gamma transformation or quantizing. - */ - -#ifdef PNG_READ_INVERT_SUPPORTED - /* Invert monochrome files to have 0 as white and 1 as black - */ - if (transforms & PNG_TRANSFORM_INVERT_MONO) - png_set_invert_mono(png_ptr); -#endif - -#ifdef PNG_READ_SHIFT_SUPPORTED - /* If you want to shift the pixel values from the range [0,255] or - * [0,65535] to the original [0,7] or [0,31], or whatever range the - * colors were originally in: - */ - if ((transforms & PNG_TRANSFORM_SHIFT) - && png_get_valid(png_ptr, info_ptr, PNG_INFO_sBIT)) - { - png_color_8p sig_bit; - - png_get_sBIT(png_ptr, info_ptr, &sig_bit); - png_set_shift(png_ptr, sig_bit); - } -#endif - -#ifdef PNG_READ_BGR_SUPPORTED - /* Flip the RGB pixels to BGR (or RGBA to BGRA) */ - if (transforms & PNG_TRANSFORM_BGR) - png_set_bgr(png_ptr); -#endif - -#ifdef PNG_READ_SWAP_ALPHA_SUPPORTED - /* Swap the RGBA or GA data to ARGB or AG (or BGRA to ABGR) */ - if (transforms & PNG_TRANSFORM_SWAP_ALPHA) - png_set_swap_alpha(png_ptr); -#endif - -#ifdef PNG_READ_SWAP_SUPPORTED - /* Swap bytes of 16-bit files to least significant byte first */ - if (transforms & PNG_TRANSFORM_SWAP_ENDIAN) - png_set_swap(png_ptr); -#endif - -/* Added at libpng-1.2.41 */ -#ifdef PNG_READ_INVERT_ALPHA_SUPPORTED - /* Invert the alpha channel from opacity to transparency */ - if (transforms & PNG_TRANSFORM_INVERT_ALPHA) - png_set_invert_alpha(png_ptr); -#endif - -/* Added at libpng-1.2.41 */ -#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED - /* Expand grayscale image to RGB */ - if (transforms & PNG_TRANSFORM_GRAY_TO_RGB) - png_set_gray_to_rgb(png_ptr); -#endif - -/* Added at libpng-1.5.4 */ -#ifdef PNG_READ_EXPAND_16_SUPPORTED - if (transforms & PNG_TRANSFORM_EXPAND_16) - png_set_expand_16(png_ptr); -#endif - - /* We don't handle adding filler bytes */ - - /* We use png_read_image and rely on that for interlace handling, but we also - * call png_read_update_info therefore must turn on interlace handling now: - */ - (void)png_set_interlace_handling(png_ptr); - - /* Optional call to gamma correct and add the background to the palette - * and update info structure. REQUIRED if you are expecting libpng to - * update the palette for you (i.e., you selected such a transform above). - */ - png_read_update_info(png_ptr, info_ptr); - - /* -------------- image transformations end here ------------------- */ - - png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0); - if (info_ptr->row_pointers == NULL) - { - png_uint_32 iptr; - - info_ptr->row_pointers = (png_bytepp)png_malloc(png_ptr, - info_ptr->height * png_sizeof(png_bytep)); - for (iptr=0; iptrheight; iptr++) - info_ptr->row_pointers[iptr] = NULL; - - info_ptr->free_me |= PNG_FREE_ROWS; - - for (row = 0; row < (int)info_ptr->height; row++) - info_ptr->row_pointers[row] = (png_bytep)png_malloc(png_ptr, - png_get_rowbytes(png_ptr, info_ptr)); - } - - png_read_image(png_ptr, info_ptr->row_pointers); - info_ptr->valid |= PNG_INFO_IDAT; - - /* Read rest of file, and get additional chunks in info_ptr - REQUIRED */ - png_read_end(png_ptr, info_ptr); - - PNG_UNUSED(transforms) /* Quiet compiler warnings */ - PNG_UNUSED(params) - -} -#endif /* PNG_INFO_IMAGE_SUPPORTED */ -#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */ -#endif /* PNG_READ_SUPPORTED */ diff --git a/extern/libpng/include/pngrutil.c b/extern/libpng/include/pngrutil.c deleted file mode 100644 index aa592ccfbd..0000000000 --- a/extern/libpng/include/pngrutil.c +++ /dev/null @@ -1,4159 +0,0 @@ - -/* pngrutil.c - utilities to read a PNG file - * - * Last changed in libpng 1.5.10 [March 8, 2012] - * Copyright (c) 1998-2012 Glenn Randers-Pehrson - * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) - * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) - * - * This code is released under the libpng license. - * For conditions of distribution and use, see the disclaimer - * and license in png.h - * - * This file contains routines that are only called from within - * libpng itself during the course of reading an image. - */ - -#include "pngpriv.h" - -#ifdef PNG_READ_SUPPORTED - -#define png_strtod(p,a,b) strtod(a,b) - -png_uint_32 PNGAPI -png_get_uint_31(png_structp png_ptr, png_const_bytep buf) -{ - png_uint_32 uval = png_get_uint_32(buf); - - if (uval > PNG_UINT_31_MAX) - png_error(png_ptr, "PNG unsigned integer out of range"); - - return (uval); -} - -#if defined(PNG_READ_gAMA_SUPPORTED) || defined(PNG_READ_cHRM_SUPPORTED) -/* The following is a variation on the above for use with the fixed - * point values used for gAMA and cHRM. Instead of png_error it - * issues a warning and returns (-1) - an invalid value because both - * gAMA and cHRM use *unsigned* integers for fixed point values. - */ -#define PNG_FIXED_ERROR (-1) - -static png_fixed_point /* PRIVATE */ -png_get_fixed_point(png_structp png_ptr, png_const_bytep buf) -{ - png_uint_32 uval = png_get_uint_32(buf); - - if (uval <= PNG_UINT_31_MAX) - return (png_fixed_point)uval; /* known to be in range */ - - /* The caller can turn off the warning by passing NULL. */ - if (png_ptr != NULL) - png_warning(png_ptr, "PNG fixed point integer out of range"); - - return PNG_FIXED_ERROR; -} -#endif - -#ifdef PNG_READ_INT_FUNCTIONS_SUPPORTED -/* NOTE: the read macros will obscure these definitions, so that if - * PNG_USE_READ_MACROS is set the library will not use them internally, - * but the APIs will still be available externally. - * - * The parentheses around "PNGAPI function_name" in the following three - * functions are necessary because they allow the macros to co-exist with - * these (unused but exported) functions. - */ - -/* Grab an unsigned 32-bit integer from a buffer in big-endian format. */ -png_uint_32 (PNGAPI -png_get_uint_32)(png_const_bytep buf) -{ - png_uint_32 uval = - ((png_uint_32)(*(buf )) << 24) + - ((png_uint_32)(*(buf + 1)) << 16) + - ((png_uint_32)(*(buf + 2)) << 8) + - ((png_uint_32)(*(buf + 3)) ) ; - - return uval; -} - -/* Grab a signed 32-bit integer from a buffer in big-endian format. The - * data is stored in the PNG file in two's complement format and there - * is no guarantee that a 'png_int_32' is exactly 32 bits, therefore - * the following code does a two's complement to native conversion. - */ -png_int_32 (PNGAPI -png_get_int_32)(png_const_bytep buf) -{ - png_uint_32 uval = png_get_uint_32(buf); - if ((uval & 0x80000000) == 0) /* non-negative */ - return uval; - - uval = (uval ^ 0xffffffff) + 1; /* 2's complement: -x = ~x+1 */ - return -(png_int_32)uval; -} - -/* Grab an unsigned 16-bit integer from a buffer in big-endian format. */ -png_uint_16 (PNGAPI -png_get_uint_16)(png_const_bytep buf) -{ - /* ANSI-C requires an int value to accomodate at least 16 bits so this - * works and allows the compiler not to worry about possible narrowing - * on 32 bit systems. (Pre-ANSI systems did not make integers smaller - * than 16 bits either.) - */ - unsigned int val = - ((unsigned int)(*buf) << 8) + - ((unsigned int)(*(buf + 1))); - - return (png_uint_16)val; -} - -#endif /* PNG_READ_INT_FUNCTIONS_SUPPORTED */ - -/* Read and check the PNG file signature */ -void /* PRIVATE */ -png_read_sig(png_structp png_ptr, png_infop info_ptr) -{ - png_size_t num_checked, num_to_check; - - /* Exit if the user application does not expect a signature. */ - if (png_ptr->sig_bytes >= 8) - return; - - num_checked = png_ptr->sig_bytes; - num_to_check = 8 - num_checked; - -#ifdef PNG_IO_STATE_SUPPORTED - png_ptr->io_state = PNG_IO_READING | PNG_IO_SIGNATURE; -#endif - - /* The signature must be serialized in a single I/O call. */ - png_read_data(png_ptr, &(info_ptr->signature[num_checked]), num_to_check); - png_ptr->sig_bytes = 8; - - if (png_sig_cmp(info_ptr->signature, num_checked, num_to_check)) - { - if (num_checked < 4 && - png_sig_cmp(info_ptr->signature, num_checked, num_to_check - 4)) - png_error(png_ptr, "Not a PNG file"); - else - png_error(png_ptr, "PNG file corrupted by ASCII conversion"); - } - if (num_checked < 3) - png_ptr->mode |= PNG_HAVE_PNG_SIGNATURE; -} - -/* Read the chunk header (length + type name). - * Put the type name into png_ptr->chunk_name, and return the length. - */ -png_uint_32 /* PRIVATE */ -png_read_chunk_header(png_structp png_ptr) -{ - png_byte buf[8]; - png_uint_32 length; - -#ifdef PNG_IO_STATE_SUPPORTED - png_ptr->io_state = PNG_IO_READING | PNG_IO_CHUNK_HDR; -#endif - - /* Read the length and the chunk name. - * This must be performed in a single I/O call. - */ - png_read_data(png_ptr, buf, 8); - length = png_get_uint_31(png_ptr, buf); - - /* Put the chunk name into png_ptr->chunk_name. */ - png_ptr->chunk_name = PNG_CHUNK_FROM_STRING(buf+4); - - png_debug2(0, "Reading %lx chunk, length = %lu", - (unsigned long)png_ptr->chunk_name, (unsigned long)length); - - /* Reset the crc and run it over the chunk name. */ - png_reset_crc(png_ptr); - png_calculate_crc(png_ptr, buf + 4, 4); - - /* Check to see if chunk name is valid. */ - png_check_chunk_name(png_ptr, png_ptr->chunk_name); - -#ifdef PNG_IO_STATE_SUPPORTED - png_ptr->io_state = PNG_IO_READING | PNG_IO_CHUNK_DATA; -#endif - - return length; -} - -/* Read data, and (optionally) run it through the CRC. */ -void /* PRIVATE */ -png_crc_read(png_structp png_ptr, png_bytep buf, png_size_t length) -{ - if (png_ptr == NULL) - return; - - png_read_data(png_ptr, buf, length); - png_calculate_crc(png_ptr, buf, length); -} - -/* Optionally skip data and then check the CRC. Depending on whether we - * are reading a ancillary or critical chunk, and how the program has set - * things up, we may calculate the CRC on the data and print a message. - * Returns '1' if there was a CRC error, '0' otherwise. - */ -int /* PRIVATE */ -png_crc_finish(png_structp png_ptr, png_uint_32 skip) -{ - png_size_t i; - png_size_t istop = png_ptr->zbuf_size; - - for (i = (png_size_t)skip; i > istop; i -= istop) - { - png_crc_read(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size); - } - - if (i) - { - png_crc_read(png_ptr, png_ptr->zbuf, i); - } - - if (png_crc_error(png_ptr)) - { - if (PNG_CHUNK_ANCILLIARY(png_ptr->chunk_name) ? - !(png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_NOWARN) : - (png_ptr->flags & PNG_FLAG_CRC_CRITICAL_USE)) - { - png_chunk_warning(png_ptr, "CRC error"); - } - - else - { - png_chunk_benign_error(png_ptr, "CRC error"); - return (0); - } - - return (1); - } - - return (0); -} - -/* Compare the CRC stored in the PNG file with that calculated by libpng from - * the data it has read thus far. - */ -int /* PRIVATE */ -png_crc_error(png_structp png_ptr) -{ - png_byte crc_bytes[4]; - png_uint_32 crc; - int need_crc = 1; - - if (PNG_CHUNK_ANCILLIARY(png_ptr->chunk_name)) - { - if ((png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_MASK) == - (PNG_FLAG_CRC_ANCILLARY_USE | PNG_FLAG_CRC_ANCILLARY_NOWARN)) - need_crc = 0; - } - - else /* critical */ - { - if (png_ptr->flags & PNG_FLAG_CRC_CRITICAL_IGNORE) - need_crc = 0; - } - -#ifdef PNG_IO_STATE_SUPPORTED - png_ptr->io_state = PNG_IO_READING | PNG_IO_CHUNK_CRC; -#endif - - /* The chunk CRC must be serialized in a single I/O call. */ - png_read_data(png_ptr, crc_bytes, 4); - - if (need_crc) - { - crc = png_get_uint_32(crc_bytes); - return ((int)(crc != png_ptr->crc)); - } - - else - return (0); -} - -#ifdef PNG_READ_COMPRESSED_TEXT_SUPPORTED -static png_size_t -png_inflate(png_structp png_ptr, png_bytep data, png_size_t size, - png_bytep output, png_size_t output_size) -{ - png_size_t count = 0; - - /* zlib can't necessarily handle more than 65535 bytes at once (i.e. it can't - * even necessarily handle 65536 bytes) because the type uInt is "16 bits or - * more". Consequently it is necessary to chunk the input to zlib. This - * code uses ZLIB_IO_MAX, from pngpriv.h, as the maximum (the maximum value - * that can be stored in a uInt.) It is possible to set ZLIB_IO_MAX to a - * lower value in pngpriv.h and this may sometimes have a performance - * advantage, because it forces access of the input data to be separated from - * at least some of the use by some period of time. - */ - png_ptr->zstream.next_in = data; - /* avail_in is set below from 'size' */ - png_ptr->zstream.avail_in = 0; - - while (1) - { - int ret, avail; - - /* The setting of 'avail_in' used to be outside the loop; by setting it - * inside it is possible to chunk the input to zlib and simply rely on - * zlib to advance the 'next_in' pointer. This allows arbitrary amounts o - * data to be passed through zlib at the unavoidable cost of requiring a - * window save (memcpy of up to 32768 output bytes) every ZLIB_IO_MAX - * input bytes. - */ - if (png_ptr->zstream.avail_in == 0 && size > 0) - { - if (size <= ZLIB_IO_MAX) - { - /* The value is less than ZLIB_IO_MAX so the cast is safe: */ - png_ptr->zstream.avail_in = (uInt)size; - size = 0; - } - - else - { - png_ptr->zstream.avail_in = ZLIB_IO_MAX; - size -= ZLIB_IO_MAX; - } - } - - /* Reset the output buffer each time round - we empty it - * after every inflate call. - */ - png_ptr->zstream.next_out = png_ptr->zbuf; - png_ptr->zstream.avail_out = png_ptr->zbuf_size; - - ret = inflate(&png_ptr->zstream, Z_NO_FLUSH); - avail = png_ptr->zbuf_size - png_ptr->zstream.avail_out; - - /* First copy/count any new output - but only if we didn't - * get an error code. - */ - if ((ret == Z_OK || ret == Z_STREAM_END) && avail > 0) - { - png_size_t space = avail; /* > 0, see above */ - - if (output != 0 && output_size > count) - { - png_size_t copy = output_size - count; - - if (space < copy) - copy = space; - - png_memcpy(output + count, png_ptr->zbuf, copy); - } - count += space; - } - - if (ret == Z_OK) - continue; - - /* Termination conditions - always reset the zstream, it - * must be left in inflateInit state. - */ - png_ptr->zstream.avail_in = 0; - inflateReset(&png_ptr->zstream); - - if (ret == Z_STREAM_END) - return count; /* NOTE: may be zero. */ - - /* Now handle the error codes - the API always returns 0 - * and the error message is dumped into the uncompressed - * buffer if available. - */ -# ifdef PNG_WARNINGS_SUPPORTED - { - png_const_charp msg; - - if (png_ptr->zstream.msg != 0) - msg = png_ptr->zstream.msg; - - else switch (ret) - { - case Z_BUF_ERROR: - msg = "Buffer error in compressed datastream"; - break; - - case Z_DATA_ERROR: - msg = "Data error in compressed datastream"; - break; - - default: - msg = "Incomplete compressed datastream"; - break; - } - - png_chunk_warning(png_ptr, msg); - } -# endif - - /* 0 means an error - notice that this code simply ignores - * zero length compressed chunks as a result. - */ - return 0; - } -} - -/* - * Decompress trailing data in a chunk. The assumption is that chunkdata - * points at an allocated area holding the contents of a chunk with a - * trailing compressed part. What we get back is an allocated area - * holding the original prefix part and an uncompressed version of the - * trailing part (the malloc area passed in is freed). - */ -void /* PRIVATE */ -png_decompress_chunk(png_structp png_ptr, int comp_type, - png_size_t chunklength, - png_size_t prefix_size, png_size_t *newlength) -{ - /* The caller should guarantee this */ - if (prefix_size > chunklength) - { - /* The recovery is to delete the chunk. */ - png_warning(png_ptr, "invalid chunklength"); - prefix_size = 0; /* To delete everything */ - } - - else if (comp_type == PNG_COMPRESSION_TYPE_BASE) - { - png_size_t expanded_size = png_inflate(png_ptr, - (png_bytep)(png_ptr->chunkdata + prefix_size), - chunklength - prefix_size, - 0, /* output */ - 0); /* output size */ - - /* Now check the limits on this chunk - if the limit fails the - * compressed data will be removed, the prefix will remain. - */ - if (prefix_size >= (~(png_size_t)0) - 1 || - expanded_size >= (~(png_size_t)0) - 1 - prefix_size -#ifdef PNG_USER_LIMITS_SUPPORTED - || (png_ptr->user_chunk_malloc_max && - (prefix_size + expanded_size >= png_ptr->user_chunk_malloc_max - 1)) -#else - || ((PNG_USER_CHUNK_MALLOC_MAX > 0) && - prefix_size + expanded_size >= PNG_USER_CHUNK_MALLOC_MAX - 1) -#endif - ) - png_warning(png_ptr, "Exceeded size limit while expanding chunk"); - - /* If the size is zero either there was an error and a message - * has already been output (warning) or the size really is zero - * and we have nothing to do - the code will exit through the - * error case below. - */ - else if (expanded_size > 0) - { - /* Success (maybe) - really uncompress the chunk. */ - png_size_t new_size = 0; - png_charp text = (png_charp)png_malloc_warn(png_ptr, - prefix_size + expanded_size + 1); - - if (text != NULL) - { - png_memcpy(text, png_ptr->chunkdata, prefix_size); - new_size = png_inflate(png_ptr, - (png_bytep)(png_ptr->chunkdata + prefix_size), - chunklength - prefix_size, - (png_bytep)(text + prefix_size), expanded_size); - text[prefix_size + expanded_size] = 0; /* just in case */ - - if (new_size == expanded_size) - { - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = text; - *newlength = prefix_size + expanded_size; - return; /* The success return! */ - } - - png_warning(png_ptr, "png_inflate logic error"); - png_free(png_ptr, text); - } - - else - png_warning(png_ptr, "Not enough memory to decompress chunk"); - } - } - - else /* if (comp_type != PNG_COMPRESSION_TYPE_BASE) */ - { - PNG_WARNING_PARAMETERS(p) - png_warning_parameter_signed(p, 1, PNG_NUMBER_FORMAT_d, comp_type); - png_formatted_warning(png_ptr, p, "Unknown compression type @1"); - - /* The recovery is to simply drop the data. */ - } - - /* Generic error return - leave the prefix, delete the compressed - * data, reallocate the chunkdata to remove the potentially large - * amount of compressed data. - */ - { - png_charp text = (png_charp)png_malloc_warn(png_ptr, prefix_size + 1); - - if (text != NULL) - { - if (prefix_size > 0) - png_memcpy(text, png_ptr->chunkdata, prefix_size); - - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = text; - - /* This is an extra zero in the 'uncompressed' part. */ - *(png_ptr->chunkdata + prefix_size) = 0x00; - } - /* Ignore a malloc error here - it is safe. */ - } - - *newlength = prefix_size; -} -#endif /* PNG_READ_COMPRESSED_TEXT_SUPPORTED */ - -/* Read and check the IDHR chunk */ -void /* PRIVATE */ -png_handle_IHDR(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - png_byte buf[13]; - png_uint_32 width, height; - int bit_depth, color_type, compression_type, filter_type; - int interlace_type; - - png_debug(1, "in png_handle_IHDR"); - - if (png_ptr->mode & PNG_HAVE_IHDR) - png_error(png_ptr, "Out of place IHDR"); - - /* Check the length */ - if (length != 13) - png_error(png_ptr, "Invalid IHDR chunk"); - - png_ptr->mode |= PNG_HAVE_IHDR; - - png_crc_read(png_ptr, buf, 13); - png_crc_finish(png_ptr, 0); - - width = png_get_uint_31(png_ptr, buf); - height = png_get_uint_31(png_ptr, buf + 4); - bit_depth = buf[8]; - color_type = buf[9]; - compression_type = buf[10]; - filter_type = buf[11]; - interlace_type = buf[12]; - - /* Set internal variables */ - png_ptr->width = width; - png_ptr->height = height; - png_ptr->bit_depth = (png_byte)bit_depth; - png_ptr->interlaced = (png_byte)interlace_type; - png_ptr->color_type = (png_byte)color_type; -#ifdef PNG_MNG_FEATURES_SUPPORTED - png_ptr->filter_type = (png_byte)filter_type; -#endif - png_ptr->compression_type = (png_byte)compression_type; - - /* Find number of channels */ - switch (png_ptr->color_type) - { - default: /* invalid, png_set_IHDR calls png_error */ - case PNG_COLOR_TYPE_GRAY: - case PNG_COLOR_TYPE_PALETTE: - png_ptr->channels = 1; - break; - - case PNG_COLOR_TYPE_RGB: - png_ptr->channels = 3; - break; - - case PNG_COLOR_TYPE_GRAY_ALPHA: - png_ptr->channels = 2; - break; - - case PNG_COLOR_TYPE_RGB_ALPHA: - png_ptr->channels = 4; - break; - } - - /* Set up other useful info */ - png_ptr->pixel_depth = (png_byte)(png_ptr->bit_depth * - png_ptr->channels); - png_ptr->rowbytes = PNG_ROWBYTES(png_ptr->pixel_depth, png_ptr->width); - png_debug1(3, "bit_depth = %d", png_ptr->bit_depth); - png_debug1(3, "channels = %d", png_ptr->channels); - png_debug1(3, "rowbytes = %lu", (unsigned long)png_ptr->rowbytes); - png_set_IHDR(png_ptr, info_ptr, width, height, bit_depth, - color_type, interlace_type, compression_type, filter_type); -} - -/* Read and check the palette */ -void /* PRIVATE */ -png_handle_PLTE(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - png_color palette[PNG_MAX_PALETTE_LENGTH]; - int num, i; -#ifdef PNG_POINTER_INDEXING_SUPPORTED - png_colorp pal_ptr; -#endif - - png_debug(1, "in png_handle_PLTE"); - - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before PLTE"); - - else if (png_ptr->mode & PNG_HAVE_IDAT) - { - png_warning(png_ptr, "Invalid PLTE after IDAT"); - png_crc_finish(png_ptr, length); - return; - } - - else if (png_ptr->mode & PNG_HAVE_PLTE) - png_error(png_ptr, "Duplicate PLTE chunk"); - - png_ptr->mode |= PNG_HAVE_PLTE; - - if (!(png_ptr->color_type&PNG_COLOR_MASK_COLOR)) - { - png_warning(png_ptr, - "Ignoring PLTE chunk in grayscale PNG"); - png_crc_finish(png_ptr, length); - return; - } - -#ifndef PNG_READ_OPT_PLTE_SUPPORTED - if (png_ptr->color_type != PNG_COLOR_TYPE_PALETTE) - { - png_crc_finish(png_ptr, length); - return; - } -#endif - - if (length > 3*PNG_MAX_PALETTE_LENGTH || length % 3) - { - if (png_ptr->color_type != PNG_COLOR_TYPE_PALETTE) - { - png_warning(png_ptr, "Invalid palette chunk"); - png_crc_finish(png_ptr, length); - return; - } - - else - { - png_error(png_ptr, "Invalid palette chunk"); - } - } - - num = (int)length / 3; - -#ifdef PNG_POINTER_INDEXING_SUPPORTED - for (i = 0, pal_ptr = palette; i < num; i++, pal_ptr++) - { - png_byte buf[3]; - - png_crc_read(png_ptr, buf, 3); - pal_ptr->red = buf[0]; - pal_ptr->green = buf[1]; - pal_ptr->blue = buf[2]; - } -#else - for (i = 0; i < num; i++) - { - png_byte buf[3]; - - png_crc_read(png_ptr, buf, 3); - /* Don't depend upon png_color being any order */ - palette[i].red = buf[0]; - palette[i].green = buf[1]; - palette[i].blue = buf[2]; - } -#endif - - /* If we actually need the PLTE chunk (ie for a paletted image), we do - * whatever the normal CRC configuration tells us. However, if we - * have an RGB image, the PLTE can be considered ancillary, so - * we will act as though it is. - */ -#ifndef PNG_READ_OPT_PLTE_SUPPORTED - if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) -#endif - { - png_crc_finish(png_ptr, 0); - } - -#ifndef PNG_READ_OPT_PLTE_SUPPORTED - else if (png_crc_error(png_ptr)) /* Only if we have a CRC error */ - { - /* If we don't want to use the data from an ancillary chunk, - * we have two options: an error abort, or a warning and we - * ignore the data in this chunk (which should be OK, since - * it's considered ancillary for a RGB or RGBA image). - */ - if (!(png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_USE)) - { - if (png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_NOWARN) - { - png_chunk_benign_error(png_ptr, "CRC error"); - } - - else - { - png_chunk_warning(png_ptr, "CRC error"); - return; - } - } - - /* Otherwise, we (optionally) emit a warning and use the chunk. */ - else if (!(png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_NOWARN)) - { - png_chunk_warning(png_ptr, "CRC error"); - } - } -#endif - - png_set_PLTE(png_ptr, info_ptr, palette, num); - -#ifdef PNG_READ_tRNS_SUPPORTED - if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) - { - if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_tRNS)) - { - if (png_ptr->num_trans > (png_uint_16)num) - { - png_warning(png_ptr, "Truncating incorrect tRNS chunk length"); - png_ptr->num_trans = (png_uint_16)num; - } - - if (info_ptr->num_trans > (png_uint_16)num) - { - png_warning(png_ptr, "Truncating incorrect info tRNS chunk length"); - info_ptr->num_trans = (png_uint_16)num; - } - } - } -#endif - -} - -void /* PRIVATE */ -png_handle_IEND(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - png_debug(1, "in png_handle_IEND"); - - if (!(png_ptr->mode & PNG_HAVE_IHDR) || !(png_ptr->mode & PNG_HAVE_IDAT)) - { - png_error(png_ptr, "No image in file"); - } - - png_ptr->mode |= (PNG_AFTER_IDAT | PNG_HAVE_IEND); - - if (length != 0) - { - png_warning(png_ptr, "Incorrect IEND chunk length"); - } - - png_crc_finish(png_ptr, length); - - PNG_UNUSED(info_ptr) /* Quiet compiler warnings about unused info_ptr */ -} - -#ifdef PNG_READ_gAMA_SUPPORTED -void /* PRIVATE */ -png_handle_gAMA(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - png_fixed_point igamma; - png_byte buf[4]; - - png_debug(1, "in png_handle_gAMA"); - - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before gAMA"); - - else if (png_ptr->mode & PNG_HAVE_IDAT) - { - png_warning(png_ptr, "Invalid gAMA after IDAT"); - png_crc_finish(png_ptr, length); - return; - } - - else if (png_ptr->mode & PNG_HAVE_PLTE) - /* Should be an error, but we can cope with it */ - png_warning(png_ptr, "Out of place gAMA chunk"); - - if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA) -#ifdef PNG_READ_sRGB_SUPPORTED - && !(info_ptr->valid & PNG_INFO_sRGB) -#endif - ) - { - png_warning(png_ptr, "Duplicate gAMA chunk"); - png_crc_finish(png_ptr, length); - return; - } - - if (length != 4) - { - png_warning(png_ptr, "Incorrect gAMA chunk length"); - png_crc_finish(png_ptr, length); - return; - } - - png_crc_read(png_ptr, buf, 4); - - if (png_crc_finish(png_ptr, 0)) - return; - - igamma = png_get_fixed_point(NULL, buf); - - /* Check for zero gamma or an error. */ - if (igamma <= 0) - { - png_warning(png_ptr, - "Ignoring gAMA chunk with out of range gamma"); - - return; - } - -# ifdef PNG_READ_sRGB_SUPPORTED - if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_sRGB)) - { - if (PNG_OUT_OF_RANGE(igamma, 45500, 500)) - { - PNG_WARNING_PARAMETERS(p) - png_warning_parameter_signed(p, 1, PNG_NUMBER_FORMAT_fixed, igamma); - png_formatted_warning(png_ptr, p, - "Ignoring incorrect gAMA value @1 when sRGB is also present"); - return; - } - } -# endif /* PNG_READ_sRGB_SUPPORTED */ - -# ifdef PNG_READ_GAMMA_SUPPORTED - /* Gamma correction on read is supported. */ - png_ptr->gamma = igamma; -# endif - /* And set the 'info' structure members. */ - png_set_gAMA_fixed(png_ptr, info_ptr, igamma); -} -#endif - -#ifdef PNG_READ_sBIT_SUPPORTED -void /* PRIVATE */ -png_handle_sBIT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - png_size_t truelen; - png_byte buf[4]; - - png_debug(1, "in png_handle_sBIT"); - - buf[0] = buf[1] = buf[2] = buf[3] = 0; - - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before sBIT"); - - else if (png_ptr->mode & PNG_HAVE_IDAT) - { - png_warning(png_ptr, "Invalid sBIT after IDAT"); - png_crc_finish(png_ptr, length); - return; - } - - else if (png_ptr->mode & PNG_HAVE_PLTE) - { - /* Should be an error, but we can cope with it */ - png_warning(png_ptr, "Out of place sBIT chunk"); - } - - if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_sBIT)) - { - png_warning(png_ptr, "Duplicate sBIT chunk"); - png_crc_finish(png_ptr, length); - return; - } - - if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) - truelen = 3; - - else - truelen = (png_size_t)png_ptr->channels; - - if (length != truelen || length > 4) - { - png_warning(png_ptr, "Incorrect sBIT chunk length"); - png_crc_finish(png_ptr, length); - return; - } - - png_crc_read(png_ptr, buf, truelen); - - if (png_crc_finish(png_ptr, 0)) - return; - - if (png_ptr->color_type & PNG_COLOR_MASK_COLOR) - { - png_ptr->sig_bit.red = buf[0]; - png_ptr->sig_bit.green = buf[1]; - png_ptr->sig_bit.blue = buf[2]; - png_ptr->sig_bit.alpha = buf[3]; - } - - else - { - png_ptr->sig_bit.gray = buf[0]; - png_ptr->sig_bit.red = buf[0]; - png_ptr->sig_bit.green = buf[0]; - png_ptr->sig_bit.blue = buf[0]; - png_ptr->sig_bit.alpha = buf[1]; - } - - png_set_sBIT(png_ptr, info_ptr, &(png_ptr->sig_bit)); -} -#endif - -#ifdef PNG_READ_cHRM_SUPPORTED -void /* PRIVATE */ -png_handle_cHRM(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - png_byte buf[32]; - png_fixed_point x_white, y_white, x_red, y_red, x_green, y_green, x_blue, - y_blue; - - png_debug(1, "in png_handle_cHRM"); - - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before cHRM"); - - else if (png_ptr->mode & PNG_HAVE_IDAT) - { - png_warning(png_ptr, "Invalid cHRM after IDAT"); - png_crc_finish(png_ptr, length); - return; - } - - else if (png_ptr->mode & PNG_HAVE_PLTE) - /* Should be an error, but we can cope with it */ - png_warning(png_ptr, "Out of place cHRM chunk"); - - if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM) -# ifdef PNG_READ_sRGB_SUPPORTED - && !(info_ptr->valid & PNG_INFO_sRGB) -# endif - ) - { - png_warning(png_ptr, "Duplicate cHRM chunk"); - png_crc_finish(png_ptr, length); - return; - } - - if (length != 32) - { - png_warning(png_ptr, "Incorrect cHRM chunk length"); - png_crc_finish(png_ptr, length); - return; - } - - png_crc_read(png_ptr, buf, 32); - - if (png_crc_finish(png_ptr, 0)) - return; - - x_white = png_get_fixed_point(NULL, buf); - y_white = png_get_fixed_point(NULL, buf + 4); - x_red = png_get_fixed_point(NULL, buf + 8); - y_red = png_get_fixed_point(NULL, buf + 12); - x_green = png_get_fixed_point(NULL, buf + 16); - y_green = png_get_fixed_point(NULL, buf + 20); - x_blue = png_get_fixed_point(NULL, buf + 24); - y_blue = png_get_fixed_point(NULL, buf + 28); - - if (x_white == PNG_FIXED_ERROR || - y_white == PNG_FIXED_ERROR || - x_red == PNG_FIXED_ERROR || - y_red == PNG_FIXED_ERROR || - x_green == PNG_FIXED_ERROR || - y_green == PNG_FIXED_ERROR || - x_blue == PNG_FIXED_ERROR || - y_blue == PNG_FIXED_ERROR) - { - png_warning(png_ptr, "Ignoring cHRM chunk with negative chromaticities"); - return; - } - -#ifdef PNG_READ_sRGB_SUPPORTED - if ((info_ptr != NULL) && (info_ptr->valid & PNG_INFO_sRGB)) - { - if (PNG_OUT_OF_RANGE(x_white, 31270, 1000) || - PNG_OUT_OF_RANGE(y_white, 32900, 1000) || - PNG_OUT_OF_RANGE(x_red, 64000, 1000) || - PNG_OUT_OF_RANGE(y_red, 33000, 1000) || - PNG_OUT_OF_RANGE(x_green, 30000, 1000) || - PNG_OUT_OF_RANGE(y_green, 60000, 1000) || - PNG_OUT_OF_RANGE(x_blue, 15000, 1000) || - PNG_OUT_OF_RANGE(y_blue, 6000, 1000)) - { - PNG_WARNING_PARAMETERS(p) - - png_warning_parameter_signed(p, 1, PNG_NUMBER_FORMAT_fixed, x_white); - png_warning_parameter_signed(p, 2, PNG_NUMBER_FORMAT_fixed, y_white); - png_warning_parameter_signed(p, 3, PNG_NUMBER_FORMAT_fixed, x_red); - png_warning_parameter_signed(p, 4, PNG_NUMBER_FORMAT_fixed, y_red); - png_warning_parameter_signed(p, 5, PNG_NUMBER_FORMAT_fixed, x_green); - png_warning_parameter_signed(p, 6, PNG_NUMBER_FORMAT_fixed, y_green); - png_warning_parameter_signed(p, 7, PNG_NUMBER_FORMAT_fixed, x_blue); - png_warning_parameter_signed(p, 8, PNG_NUMBER_FORMAT_fixed, y_blue); - - png_formatted_warning(png_ptr, p, - "Ignoring incorrect cHRM white(@1,@2) r(@3,@4)g(@5,@6)b(@7,@8) " - "when sRGB is also present"); - } - return; - } -#endif /* PNG_READ_sRGB_SUPPORTED */ - -#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED - /* Store the _white values as default coefficients for the rgb to gray - * operation if it is supported. Check if the transform is already set to - * avoid destroying the transform values. - */ - if (!png_ptr->rgb_to_gray_coefficients_set) - { - /* png_set_background has not been called and we haven't seen an sRGB - * chunk yet. Find the XYZ of the three end points. - */ - png_XYZ XYZ; - png_xy xy; - - xy.redx = x_red; - xy.redy = y_red; - xy.greenx = x_green; - xy.greeny = y_green; - xy.bluex = x_blue; - xy.bluey = y_blue; - xy.whitex = x_white; - xy.whitey = y_white; - - if (png_XYZ_from_xy_checked(png_ptr, &XYZ, xy)) - { - /* The success case, because XYZ_from_xy normalises to a reference - * white Y of 1.0 we just need to scale the numbers. This should - * always work just fine. It is an internal error if this overflows. - */ - { - png_fixed_point r, g, b; - if (png_muldiv(&r, XYZ.redY, 32768, PNG_FP_1) && - r >= 0 && r <= 32768 && - png_muldiv(&g, XYZ.greenY, 32768, PNG_FP_1) && - g >= 0 && g <= 32768 && - png_muldiv(&b, XYZ.blueY, 32768, PNG_FP_1) && - b >= 0 && b <= 32768 && - r+g+b <= 32769) - { - /* We allow 0 coefficients here. r+g+b may be 32769 if two or - * all of the coefficients were rounded up. Handle this by - * reducing the *largest* coefficient by 1; this matches the - * approach used for the default coefficients in pngrtran.c - */ - int add = 0; - - if (r+g+b > 32768) - add = -1; - else if (r+g+b < 32768) - add = 1; - - if (add != 0) - { - if (g >= r && g >= b) - g += add; - else if (r >= g && r >= b) - r += add; - else - b += add; - } - - /* Check for an internal error. */ - if (r+g+b != 32768) - png_error(png_ptr, - "internal error handling cHRM coefficients"); - - png_ptr->rgb_to_gray_red_coeff = (png_uint_16)r; - png_ptr->rgb_to_gray_green_coeff = (png_uint_16)g; - } - - /* This is a png_error at present even though it could be ignored - - * it should never happen, but it is important that if it does, the - * bug is fixed. - */ - else - png_error(png_ptr, "internal error handling cHRM->XYZ"); - } - } - } -#endif - - png_set_cHRM_fixed(png_ptr, info_ptr, x_white, y_white, x_red, y_red, - x_green, y_green, x_blue, y_blue); -} -#endif - -#ifdef PNG_READ_sRGB_SUPPORTED -void /* PRIVATE */ -png_handle_sRGB(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - int intent; - png_byte buf[1]; - - png_debug(1, "in png_handle_sRGB"); - - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before sRGB"); - - else if (png_ptr->mode & PNG_HAVE_IDAT) - { - png_warning(png_ptr, "Invalid sRGB after IDAT"); - png_crc_finish(png_ptr, length); - return; - } - - else if (png_ptr->mode & PNG_HAVE_PLTE) - /* Should be an error, but we can cope with it */ - png_warning(png_ptr, "Out of place sRGB chunk"); - - if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_sRGB)) - { - png_warning(png_ptr, "Duplicate sRGB chunk"); - png_crc_finish(png_ptr, length); - return; - } - - if (length != 1) - { - png_warning(png_ptr, "Incorrect sRGB chunk length"); - png_crc_finish(png_ptr, length); - return; - } - - png_crc_read(png_ptr, buf, 1); - - if (png_crc_finish(png_ptr, 0)) - return; - - intent = buf[0]; - - /* Check for bad intent */ - if (intent >= PNG_sRGB_INTENT_LAST) - { - png_warning(png_ptr, "Unknown sRGB intent"); - return; - } - -#if defined(PNG_READ_gAMA_SUPPORTED) && defined(PNG_READ_GAMMA_SUPPORTED) - if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA)) - { - if (PNG_OUT_OF_RANGE(info_ptr->gamma, 45500, 500)) - { - PNG_WARNING_PARAMETERS(p) - - png_warning_parameter_signed(p, 1, PNG_NUMBER_FORMAT_fixed, - info_ptr->gamma); - - png_formatted_warning(png_ptr, p, - "Ignoring incorrect gAMA value @1 when sRGB is also present"); - } - } -#endif /* PNG_READ_gAMA_SUPPORTED */ - -#ifdef PNG_READ_cHRM_SUPPORTED - if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM)) - if (PNG_OUT_OF_RANGE(info_ptr->x_white, 31270, 1000) || - PNG_OUT_OF_RANGE(info_ptr->y_white, 32900, 1000) || - PNG_OUT_OF_RANGE(info_ptr->x_red, 64000, 1000) || - PNG_OUT_OF_RANGE(info_ptr->y_red, 33000, 1000) || - PNG_OUT_OF_RANGE(info_ptr->x_green, 30000, 1000) || - PNG_OUT_OF_RANGE(info_ptr->y_green, 60000, 1000) || - PNG_OUT_OF_RANGE(info_ptr->x_blue, 15000, 1000) || - PNG_OUT_OF_RANGE(info_ptr->y_blue, 6000, 1000)) - { - png_warning(png_ptr, - "Ignoring incorrect cHRM value when sRGB is also present"); - } -#endif /* PNG_READ_cHRM_SUPPORTED */ - - /* This is recorded for use when handling the cHRM chunk above. An sRGB - * chunk unconditionally overwrites the coefficients for grayscale conversion - * too. - */ - png_ptr->is_sRGB = 1; - -# ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED - /* Don't overwrite user supplied values: */ - if (!png_ptr->rgb_to_gray_coefficients_set) - { - /* These numbers come from the sRGB specification (or, since one has to - * pay much money to get a copy, the wikipedia sRGB page) the - * chromaticity values quoted have been inverted to get the reverse - * transformation from RGB to XYZ and the 'Y' coefficients scaled by - * 32768 (then rounded). - * - * sRGB and ITU Rec-709 both truncate the values for the D65 white - * point to four digits and, even though it actually stores five - * digits, the PNG spec gives the truncated value. - * - * This means that when the chromaticities are converted back to XYZ - * end points we end up with (6968,23435,2366), which, as described in - * pngrtran.c, would overflow. If the five digit precision and up is - * used we get, instead: - * - * 6968*R + 23435*G + 2365*B - * - * (Notice that this rounds the blue coefficient down, rather than the - * choice used in pngrtran.c which is to round the green one down.) - */ - png_ptr->rgb_to_gray_red_coeff = 6968; /* 0.212639005871510 */ - png_ptr->rgb_to_gray_green_coeff = 23434; /* 0.715168678767756 */ - /* png_ptr->rgb_to_gray_blue_coeff = 2366; 0.072192315360734 */ - - /* The following keeps the cHRM chunk from destroying the - * coefficients again in the event that it follows the sRGB chunk. - */ - png_ptr->rgb_to_gray_coefficients_set = 1; - } -# endif - - png_set_sRGB_gAMA_and_cHRM(png_ptr, info_ptr, intent); -} -#endif /* PNG_READ_sRGB_SUPPORTED */ - -#ifdef PNG_READ_iCCP_SUPPORTED -void /* PRIVATE */ -png_handle_iCCP(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -/* Note: this does not properly handle chunks that are > 64K under DOS */ -{ - png_byte compression_type; - png_bytep pC; - png_charp profile; - png_uint_32 skip = 0; - png_uint_32 profile_size; - png_alloc_size_t profile_length; - png_size_t slength, prefix_length, data_length; - - png_debug(1, "in png_handle_iCCP"); - - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before iCCP"); - - else if (png_ptr->mode & PNG_HAVE_IDAT) - { - png_warning(png_ptr, "Invalid iCCP after IDAT"); - png_crc_finish(png_ptr, length); - return; - } - - else if (png_ptr->mode & PNG_HAVE_PLTE) - /* Should be an error, but we can cope with it */ - png_warning(png_ptr, "Out of place iCCP chunk"); - - if ((png_ptr->mode & PNG_HAVE_iCCP) || (info_ptr != NULL && - (info_ptr->valid & (PNG_INFO_iCCP|PNG_INFO_sRGB)))) - { - png_warning(png_ptr, "Duplicate iCCP chunk"); - png_crc_finish(png_ptr, length); - return; - } - - png_ptr->mode |= PNG_HAVE_iCCP; - -#ifdef PNG_MAX_MALLOC_64K - if (length > (png_uint_32)65535L) - { - png_warning(png_ptr, "iCCP chunk too large to fit in memory"); - skip = length - (png_uint_32)65535L; - length = (png_uint_32)65535L; - } -#endif - - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = (png_charp)png_malloc(png_ptr, length + 1); - slength = length; - png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength); - - if (png_crc_finish(png_ptr, skip)) - { - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - return; - } - - png_ptr->chunkdata[slength] = 0x00; - - for (profile = png_ptr->chunkdata; *profile; profile++) - /* Empty loop to find end of name */ ; - - ++profile; - - /* There should be at least one zero (the compression type byte) - * following the separator, and we should be on it - */ - if (profile >= png_ptr->chunkdata + slength - 1) - { - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - png_warning(png_ptr, "Malformed iCCP chunk"); - return; - } - - /* Compression_type should always be zero */ - compression_type = *profile++; - - if (compression_type) - { - png_warning(png_ptr, "Ignoring nonzero compression type in iCCP chunk"); - compression_type = 0x00; /* Reset it to zero (libpng-1.0.6 through 1.0.8 - wrote nonzero) */ - } - - prefix_length = profile - png_ptr->chunkdata; - png_decompress_chunk(png_ptr, compression_type, - slength, prefix_length, &data_length); - - profile_length = data_length - prefix_length; - - if (prefix_length > data_length || profile_length < 4) - { - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - png_warning(png_ptr, "Profile size field missing from iCCP chunk"); - return; - } - - /* Check the profile_size recorded in the first 32 bits of the ICC profile */ - pC = (png_bytep)(png_ptr->chunkdata + prefix_length); - profile_size = ((*(pC )) << 24) | - ((*(pC + 1)) << 16) | - ((*(pC + 2)) << 8) | - ((*(pC + 3)) ); - - /* NOTE: the following guarantees that 'profile_length' fits into 32 bits, - * because profile_size is a 32 bit value. - */ - if (profile_size < profile_length) - profile_length = profile_size; - - /* And the following guarantees that profile_size == profile_length. */ - if (profile_size > profile_length) - { - PNG_WARNING_PARAMETERS(p) - - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - - png_warning_parameter_unsigned(p, 1, PNG_NUMBER_FORMAT_u, profile_size); - png_warning_parameter_unsigned(p, 2, PNG_NUMBER_FORMAT_u, profile_length); - png_formatted_warning(png_ptr, p, - "Ignoring iCCP chunk with declared size = @1 and actual length = @2"); - return; - } - - png_set_iCCP(png_ptr, info_ptr, png_ptr->chunkdata, - compression_type, (png_bytep)png_ptr->chunkdata + prefix_length, - profile_size); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; -} -#endif /* PNG_READ_iCCP_SUPPORTED */ - -#ifdef PNG_READ_sPLT_SUPPORTED -void /* PRIVATE */ -png_handle_sPLT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -/* Note: this does not properly handle chunks that are > 64K under DOS */ -{ - png_bytep entry_start; - png_sPLT_t new_palette; - png_sPLT_entryp pp; - png_uint_32 data_length; - int entry_size, i; - png_uint_32 skip = 0; - png_size_t slength; - png_uint_32 dl; - png_size_t max_dl; - - png_debug(1, "in png_handle_sPLT"); - -#ifdef PNG_USER_LIMITS_SUPPORTED - - if (png_ptr->user_chunk_cache_max != 0) - { - if (png_ptr->user_chunk_cache_max == 1) - { - png_crc_finish(png_ptr, length); - return; - } - - if (--png_ptr->user_chunk_cache_max == 1) - { - png_warning(png_ptr, "No space in chunk cache for sPLT"); - png_crc_finish(png_ptr, length); - return; - } - } -#endif - - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before sPLT"); - - else if (png_ptr->mode & PNG_HAVE_IDAT) - { - png_warning(png_ptr, "Invalid sPLT after IDAT"); - png_crc_finish(png_ptr, length); - return; - } - -#ifdef PNG_MAX_MALLOC_64K - if (length > (png_uint_32)65535L) - { - png_warning(png_ptr, "sPLT chunk too large to fit in memory"); - skip = length - (png_uint_32)65535L; - length = (png_uint_32)65535L; - } -#endif - - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = (png_charp)png_malloc(png_ptr, length + 1); - - /* WARNING: this may break if size_t is less than 32 bits; it is assumed - * that the PNG_MAX_MALLOC_64K test is enabled in this case, but this is a - * potential breakage point if the types in pngconf.h aren't exactly right. - */ - slength = length; - png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength); - - if (png_crc_finish(png_ptr, skip)) - { - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - return; - } - - png_ptr->chunkdata[slength] = 0x00; - - for (entry_start = (png_bytep)png_ptr->chunkdata; *entry_start; - entry_start++) - /* Empty loop to find end of name */ ; - - ++entry_start; - - /* A sample depth should follow the separator, and we should be on it */ - if (entry_start > (png_bytep)png_ptr->chunkdata + slength - 2) - { - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - png_warning(png_ptr, "malformed sPLT chunk"); - return; - } - - new_palette.depth = *entry_start++; - entry_size = (new_palette.depth == 8 ? 6 : 10); - /* This must fit in a png_uint_32 because it is derived from the original - * chunk data length (and use 'length', not 'slength' here for clarity - - * they are guaranteed to be the same, see the tests above.) - */ - data_length = length - (png_uint_32)(entry_start - - (png_bytep)png_ptr->chunkdata); - - /* Integrity-check the data length */ - if (data_length % entry_size) - { - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - png_warning(png_ptr, "sPLT chunk has bad length"); - return; - } - - dl = (png_int_32)(data_length / entry_size); - max_dl = PNG_SIZE_MAX / png_sizeof(png_sPLT_entry); - - if (dl > max_dl) - { - png_warning(png_ptr, "sPLT chunk too long"); - return; - } - - new_palette.nentries = (png_int_32)(data_length / entry_size); - - new_palette.entries = (png_sPLT_entryp)png_malloc_warn( - png_ptr, new_palette.nentries * png_sizeof(png_sPLT_entry)); - - if (new_palette.entries == NULL) - { - png_warning(png_ptr, "sPLT chunk requires too much memory"); - return; - } - -#ifdef PNG_POINTER_INDEXING_SUPPORTED - for (i = 0; i < new_palette.nentries; i++) - { - pp = new_palette.entries + i; - - if (new_palette.depth == 8) - { - pp->red = *entry_start++; - pp->green = *entry_start++; - pp->blue = *entry_start++; - pp->alpha = *entry_start++; - } - - else - { - pp->red = png_get_uint_16(entry_start); entry_start += 2; - pp->green = png_get_uint_16(entry_start); entry_start += 2; - pp->blue = png_get_uint_16(entry_start); entry_start += 2; - pp->alpha = png_get_uint_16(entry_start); entry_start += 2; - } - - pp->frequency = png_get_uint_16(entry_start); entry_start += 2; - } -#else - pp = new_palette.entries; - - for (i = 0; i < new_palette.nentries; i++) - { - - if (new_palette.depth == 8) - { - pp[i].red = *entry_start++; - pp[i].green = *entry_start++; - pp[i].blue = *entry_start++; - pp[i].alpha = *entry_start++; - } - - else - { - pp[i].red = png_get_uint_16(entry_start); entry_start += 2; - pp[i].green = png_get_uint_16(entry_start); entry_start += 2; - pp[i].blue = png_get_uint_16(entry_start); entry_start += 2; - pp[i].alpha = png_get_uint_16(entry_start); entry_start += 2; - } - - pp[i].frequency = png_get_uint_16(entry_start); entry_start += 2; - } -#endif - - /* Discard all chunk data except the name and stash that */ - new_palette.name = png_ptr->chunkdata; - - png_set_sPLT(png_ptr, info_ptr, &new_palette, 1); - - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - png_free(png_ptr, new_palette.entries); -} -#endif /* PNG_READ_sPLT_SUPPORTED */ - -#ifdef PNG_READ_tRNS_SUPPORTED -void /* PRIVATE */ -png_handle_tRNS(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - png_byte readbuf[PNG_MAX_PALETTE_LENGTH]; - - png_debug(1, "in png_handle_tRNS"); - - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before tRNS"); - - else if (png_ptr->mode & PNG_HAVE_IDAT) - { - png_warning(png_ptr, "Invalid tRNS after IDAT"); - png_crc_finish(png_ptr, length); - return; - } - - else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_tRNS)) - { - png_warning(png_ptr, "Duplicate tRNS chunk"); - png_crc_finish(png_ptr, length); - return; - } - - if (png_ptr->color_type == PNG_COLOR_TYPE_GRAY) - { - png_byte buf[2]; - - if (length != 2) - { - png_warning(png_ptr, "Incorrect tRNS chunk length"); - png_crc_finish(png_ptr, length); - return; - } - - png_crc_read(png_ptr, buf, 2); - png_ptr->num_trans = 1; - png_ptr->trans_color.gray = png_get_uint_16(buf); - } - - else if (png_ptr->color_type == PNG_COLOR_TYPE_RGB) - { - png_byte buf[6]; - - if (length != 6) - { - png_warning(png_ptr, "Incorrect tRNS chunk length"); - png_crc_finish(png_ptr, length); - return; - } - - png_crc_read(png_ptr, buf, (png_size_t)length); - png_ptr->num_trans = 1; - png_ptr->trans_color.red = png_get_uint_16(buf); - png_ptr->trans_color.green = png_get_uint_16(buf + 2); - png_ptr->trans_color.blue = png_get_uint_16(buf + 4); - } - - else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) - { - if (!(png_ptr->mode & PNG_HAVE_PLTE)) - { - /* Should be an error, but we can cope with it. */ - png_warning(png_ptr, "Missing PLTE before tRNS"); - } - - if (length > (png_uint_32)png_ptr->num_palette || - length > PNG_MAX_PALETTE_LENGTH) - { - png_warning(png_ptr, "Incorrect tRNS chunk length"); - png_crc_finish(png_ptr, length); - return; - } - - if (length == 0) - { - png_warning(png_ptr, "Zero length tRNS chunk"); - png_crc_finish(png_ptr, length); - return; - } - - png_crc_read(png_ptr, readbuf, (png_size_t)length); - png_ptr->num_trans = (png_uint_16)length; - } - - else - { - png_warning(png_ptr, "tRNS chunk not allowed with alpha channel"); - png_crc_finish(png_ptr, length); - return; - } - - if (png_crc_finish(png_ptr, 0)) - { - png_ptr->num_trans = 0; - return; - } - - png_set_tRNS(png_ptr, info_ptr, readbuf, png_ptr->num_trans, - &(png_ptr->trans_color)); -} -#endif - -#ifdef PNG_READ_bKGD_SUPPORTED -void /* PRIVATE */ -png_handle_bKGD(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - png_size_t truelen; - png_byte buf[6]; - png_color_16 background; - - png_debug(1, "in png_handle_bKGD"); - - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before bKGD"); - - else if (png_ptr->mode & PNG_HAVE_IDAT) - { - png_warning(png_ptr, "Invalid bKGD after IDAT"); - png_crc_finish(png_ptr, length); - return; - } - - else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE && - !(png_ptr->mode & PNG_HAVE_PLTE)) - { - png_warning(png_ptr, "Missing PLTE before bKGD"); - png_crc_finish(png_ptr, length); - return; - } - - else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_bKGD)) - { - png_warning(png_ptr, "Duplicate bKGD chunk"); - png_crc_finish(png_ptr, length); - return; - } - - if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) - truelen = 1; - - else if (png_ptr->color_type & PNG_COLOR_MASK_COLOR) - truelen = 6; - - else - truelen = 2; - - if (length != truelen) - { - png_warning(png_ptr, "Incorrect bKGD chunk length"); - png_crc_finish(png_ptr, length); - return; - } - - png_crc_read(png_ptr, buf, truelen); - - if (png_crc_finish(png_ptr, 0)) - return; - - /* We convert the index value into RGB components so that we can allow - * arbitrary RGB values for background when we have transparency, and - * so it is easy to determine the RGB values of the background color - * from the info_ptr struct. - */ - if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) - { - background.index = buf[0]; - - if (info_ptr && info_ptr->num_palette) - { - if (buf[0] >= info_ptr->num_palette) - { - png_warning(png_ptr, "Incorrect bKGD chunk index value"); - return; - } - - background.red = (png_uint_16)png_ptr->palette[buf[0]].red; - background.green = (png_uint_16)png_ptr->palette[buf[0]].green; - background.blue = (png_uint_16)png_ptr->palette[buf[0]].blue; - } - - else - background.red = background.green = background.blue = 0; - - background.gray = 0; - } - - else if (!(png_ptr->color_type & PNG_COLOR_MASK_COLOR)) /* GRAY */ - { - background.index = 0; - background.red = - background.green = - background.blue = - background.gray = png_get_uint_16(buf); - } - - else - { - background.index = 0; - background.red = png_get_uint_16(buf); - background.green = png_get_uint_16(buf + 2); - background.blue = png_get_uint_16(buf + 4); - background.gray = 0; - } - - png_set_bKGD(png_ptr, info_ptr, &background); -} -#endif - -#ifdef PNG_READ_hIST_SUPPORTED -void /* PRIVATE */ -png_handle_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - unsigned int num, i; - png_uint_16 readbuf[PNG_MAX_PALETTE_LENGTH]; - - png_debug(1, "in png_handle_hIST"); - - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before hIST"); - - else if (png_ptr->mode & PNG_HAVE_IDAT) - { - png_warning(png_ptr, "Invalid hIST after IDAT"); - png_crc_finish(png_ptr, length); - return; - } - - else if (!(png_ptr->mode & PNG_HAVE_PLTE)) - { - png_warning(png_ptr, "Missing PLTE before hIST"); - png_crc_finish(png_ptr, length); - return; - } - - else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_hIST)) - { - png_warning(png_ptr, "Duplicate hIST chunk"); - png_crc_finish(png_ptr, length); - return; - } - - if (length > 2*PNG_MAX_PALETTE_LENGTH || - length != (unsigned int) (2*png_ptr->num_palette)) - { - png_warning(png_ptr, "Incorrect hIST chunk length"); - png_crc_finish(png_ptr, length); - return; - } - - num = length / 2 ; - - for (i = 0; i < num; i++) - { - png_byte buf[2]; - - png_crc_read(png_ptr, buf, 2); - readbuf[i] = png_get_uint_16(buf); - } - - if (png_crc_finish(png_ptr, 0)) - return; - - png_set_hIST(png_ptr, info_ptr, readbuf); -} -#endif - -#ifdef PNG_READ_pHYs_SUPPORTED -void /* PRIVATE */ -png_handle_pHYs(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - png_byte buf[9]; - png_uint_32 res_x, res_y; - int unit_type; - - png_debug(1, "in png_handle_pHYs"); - - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before pHYs"); - - else if (png_ptr->mode & PNG_HAVE_IDAT) - { - png_warning(png_ptr, "Invalid pHYs after IDAT"); - png_crc_finish(png_ptr, length); - return; - } - - else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs)) - { - png_warning(png_ptr, "Duplicate pHYs chunk"); - png_crc_finish(png_ptr, length); - return; - } - - if (length != 9) - { - png_warning(png_ptr, "Incorrect pHYs chunk length"); - png_crc_finish(png_ptr, length); - return; - } - - png_crc_read(png_ptr, buf, 9); - - if (png_crc_finish(png_ptr, 0)) - return; - - res_x = png_get_uint_32(buf); - res_y = png_get_uint_32(buf + 4); - unit_type = buf[8]; - png_set_pHYs(png_ptr, info_ptr, res_x, res_y, unit_type); -} -#endif - -#ifdef PNG_READ_oFFs_SUPPORTED -void /* PRIVATE */ -png_handle_oFFs(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - png_byte buf[9]; - png_int_32 offset_x, offset_y; - int unit_type; - - png_debug(1, "in png_handle_oFFs"); - - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before oFFs"); - - else if (png_ptr->mode & PNG_HAVE_IDAT) - { - png_warning(png_ptr, "Invalid oFFs after IDAT"); - png_crc_finish(png_ptr, length); - return; - } - - else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs)) - { - png_warning(png_ptr, "Duplicate oFFs chunk"); - png_crc_finish(png_ptr, length); - return; - } - - if (length != 9) - { - png_warning(png_ptr, "Incorrect oFFs chunk length"); - png_crc_finish(png_ptr, length); - return; - } - - png_crc_read(png_ptr, buf, 9); - - if (png_crc_finish(png_ptr, 0)) - return; - - offset_x = png_get_int_32(buf); - offset_y = png_get_int_32(buf + 4); - unit_type = buf[8]; - png_set_oFFs(png_ptr, info_ptr, offset_x, offset_y, unit_type); -} -#endif - -#ifdef PNG_READ_pCAL_SUPPORTED -/* Read the pCAL chunk (described in the PNG Extensions document) */ -void /* PRIVATE */ -png_handle_pCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - png_int_32 X0, X1; - png_byte type, nparams; - png_charp buf, units, endptr; - png_charpp params; - png_size_t slength; - int i; - - png_debug(1, "in png_handle_pCAL"); - - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before pCAL"); - - else if (png_ptr->mode & PNG_HAVE_IDAT) - { - png_warning(png_ptr, "Invalid pCAL after IDAT"); - png_crc_finish(png_ptr, length); - return; - } - - else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_pCAL)) - { - png_warning(png_ptr, "Duplicate pCAL chunk"); - png_crc_finish(png_ptr, length); - return; - } - - png_debug1(2, "Allocating and reading pCAL chunk data (%u bytes)", - length + 1); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = (png_charp)png_malloc_warn(png_ptr, length + 1); - - if (png_ptr->chunkdata == NULL) - { - png_warning(png_ptr, "No memory for pCAL purpose"); - return; - } - - slength = length; - png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength); - - if (png_crc_finish(png_ptr, 0)) - { - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - return; - } - - png_ptr->chunkdata[slength] = 0x00; /* Null terminate the last string */ - - png_debug(3, "Finding end of pCAL purpose string"); - for (buf = png_ptr->chunkdata; *buf; buf++) - /* Empty loop */ ; - - endptr = png_ptr->chunkdata + slength; - - /* We need to have at least 12 bytes after the purpose string - * in order to get the parameter information. - */ - if (endptr <= buf + 12) - { - png_warning(png_ptr, "Invalid pCAL data"); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - return; - } - - png_debug(3, "Reading pCAL X0, X1, type, nparams, and units"); - X0 = png_get_int_32((png_bytep)buf+1); - X1 = png_get_int_32((png_bytep)buf+5); - type = buf[9]; - nparams = buf[10]; - units = buf + 11; - - png_debug(3, "Checking pCAL equation type and number of parameters"); - /* Check that we have the right number of parameters for known - * equation types. - */ - if ((type == PNG_EQUATION_LINEAR && nparams != 2) || - (type == PNG_EQUATION_BASE_E && nparams != 3) || - (type == PNG_EQUATION_ARBITRARY && nparams != 3) || - (type == PNG_EQUATION_HYPERBOLIC && nparams != 4)) - { - png_warning(png_ptr, "Invalid pCAL parameters for equation type"); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - return; - } - - else if (type >= PNG_EQUATION_LAST) - { - png_warning(png_ptr, "Unrecognized equation type for pCAL chunk"); - } - - for (buf = units; *buf; buf++) - /* Empty loop to move past the units string. */ ; - - png_debug(3, "Allocating pCAL parameters array"); - - params = (png_charpp)png_malloc_warn(png_ptr, - (png_size_t)(nparams * png_sizeof(png_charp))); - - if (params == NULL) - { - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - png_warning(png_ptr, "No memory for pCAL params"); - return; - } - - /* Get pointers to the start of each parameter string. */ - for (i = 0; i < (int)nparams; i++) - { - buf++; /* Skip the null string terminator from previous parameter. */ - - png_debug1(3, "Reading pCAL parameter %d", i); - - for (params[i] = buf; buf <= endptr && *buf != 0x00; buf++) - /* Empty loop to move past each parameter string */ ; - - /* Make sure we haven't run out of data yet */ - if (buf > endptr) - { - png_warning(png_ptr, "Invalid pCAL data"); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - png_free(png_ptr, params); - return; - } - } - - png_set_pCAL(png_ptr, info_ptr, png_ptr->chunkdata, X0, X1, type, nparams, - units, params); - - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - png_free(png_ptr, params); -} -#endif - -#ifdef PNG_READ_sCAL_SUPPORTED -/* Read the sCAL chunk */ -void /* PRIVATE */ -png_handle_sCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - png_size_t slength, i; - int state; - - png_debug(1, "in png_handle_sCAL"); - - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before sCAL"); - - else if (png_ptr->mode & PNG_HAVE_IDAT) - { - png_warning(png_ptr, "Invalid sCAL after IDAT"); - png_crc_finish(png_ptr, length); - return; - } - - else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_sCAL)) - { - png_warning(png_ptr, "Duplicate sCAL chunk"); - png_crc_finish(png_ptr, length); - return; - } - - /* Need unit type, width, \0, height: minimum 4 bytes */ - else if (length < 4) - { - png_warning(png_ptr, "sCAL chunk too short"); - png_crc_finish(png_ptr, length); - return; - } - - png_debug1(2, "Allocating and reading sCAL chunk data (%u bytes)", - length + 1); - - png_ptr->chunkdata = (png_charp)png_malloc_warn(png_ptr, length + 1); - - if (png_ptr->chunkdata == NULL) - { - png_warning(png_ptr, "Out of memory while processing sCAL chunk"); - png_crc_finish(png_ptr, length); - return; - } - - slength = length; - png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength); - png_ptr->chunkdata[slength] = 0x00; /* Null terminate the last string */ - - if (png_crc_finish(png_ptr, 0)) - { - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - return; - } - - /* Validate the unit. */ - if (png_ptr->chunkdata[0] != 1 && png_ptr->chunkdata[0] != 2) - { - png_warning(png_ptr, "Invalid sCAL ignored: invalid unit"); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - return; - } - - /* Validate the ASCII numbers, need two ASCII numbers separated by - * a '\0' and they need to fit exactly in the chunk data. - */ - i = 1; - state = 0; - - if (!png_check_fp_number(png_ptr->chunkdata, slength, &state, &i) || - i >= slength || png_ptr->chunkdata[i++] != 0) - png_warning(png_ptr, "Invalid sCAL chunk ignored: bad width format"); - - else if (!PNG_FP_IS_POSITIVE(state)) - png_warning(png_ptr, "Invalid sCAL chunk ignored: non-positive width"); - - else - { - png_size_t heighti = i; - - state = 0; - if (!png_check_fp_number(png_ptr->chunkdata, slength, &state, &i) || - i != slength) - png_warning(png_ptr, "Invalid sCAL chunk ignored: bad height format"); - - else if (!PNG_FP_IS_POSITIVE(state)) - png_warning(png_ptr, - "Invalid sCAL chunk ignored: non-positive height"); - - else - /* This is the (only) success case. */ - png_set_sCAL_s(png_ptr, info_ptr, png_ptr->chunkdata[0], - png_ptr->chunkdata+1, png_ptr->chunkdata+heighti); - } - - /* Clean up - just free the temporarily allocated buffer. */ - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; -} -#endif - -#ifdef PNG_READ_tIME_SUPPORTED -void /* PRIVATE */ -png_handle_tIME(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - png_byte buf[7]; - png_time mod_time; - - png_debug(1, "in png_handle_tIME"); - - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Out of place tIME chunk"); - - else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_tIME)) - { - png_warning(png_ptr, "Duplicate tIME chunk"); - png_crc_finish(png_ptr, length); - return; - } - - if (png_ptr->mode & PNG_HAVE_IDAT) - png_ptr->mode |= PNG_AFTER_IDAT; - - if (length != 7) - { - png_warning(png_ptr, "Incorrect tIME chunk length"); - png_crc_finish(png_ptr, length); - return; - } - - png_crc_read(png_ptr, buf, 7); - - if (png_crc_finish(png_ptr, 0)) - return; - - mod_time.second = buf[6]; - mod_time.minute = buf[5]; - mod_time.hour = buf[4]; - mod_time.day = buf[3]; - mod_time.month = buf[2]; - mod_time.year = png_get_uint_16(buf); - - png_set_tIME(png_ptr, info_ptr, &mod_time); -} -#endif - -#ifdef PNG_READ_tEXt_SUPPORTED -/* Note: this does not properly handle chunks that are > 64K under DOS */ -void /* PRIVATE */ -png_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - png_textp text_ptr; - png_charp key; - png_charp text; - png_uint_32 skip = 0; - png_size_t slength; - int ret; - - png_debug(1, "in png_handle_tEXt"); - -#ifdef PNG_USER_LIMITS_SUPPORTED - if (png_ptr->user_chunk_cache_max != 0) - { - if (png_ptr->user_chunk_cache_max == 1) - { - png_crc_finish(png_ptr, length); - return; - } - - if (--png_ptr->user_chunk_cache_max == 1) - { - png_warning(png_ptr, "No space in chunk cache for tEXt"); - png_crc_finish(png_ptr, length); - return; - } - } -#endif - - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before tEXt"); - - if (png_ptr->mode & PNG_HAVE_IDAT) - png_ptr->mode |= PNG_AFTER_IDAT; - -#ifdef PNG_MAX_MALLOC_64K - if (length > (png_uint_32)65535L) - { - png_warning(png_ptr, "tEXt chunk too large to fit in memory"); - skip = length - (png_uint_32)65535L; - length = (png_uint_32)65535L; - } -#endif - - png_free(png_ptr, png_ptr->chunkdata); - - png_ptr->chunkdata = (png_charp)png_malloc_warn(png_ptr, length + 1); - - if (png_ptr->chunkdata == NULL) - { - png_warning(png_ptr, "No memory to process text chunk"); - return; - } - - slength = length; - png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength); - - if (png_crc_finish(png_ptr, skip)) - { - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - return; - } - - key = png_ptr->chunkdata; - - key[slength] = 0x00; - - for (text = key; *text; text++) - /* Empty loop to find end of key */ ; - - if (text != key + slength) - text++; - - text_ptr = (png_textp)png_malloc_warn(png_ptr, - png_sizeof(png_text)); - - if (text_ptr == NULL) - { - png_warning(png_ptr, "Not enough memory to process text chunk"); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - return; - } - - text_ptr->compression = PNG_TEXT_COMPRESSION_NONE; - text_ptr->key = key; - text_ptr->lang = NULL; - text_ptr->lang_key = NULL; - text_ptr->itxt_length = 0; - text_ptr->text = text; - text_ptr->text_length = png_strlen(text); - - ret = png_set_text_2(png_ptr, info_ptr, text_ptr, 1); - - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - png_free(png_ptr, text_ptr); - - if (ret) - png_warning(png_ptr, "Insufficient memory to process text chunk"); -} -#endif - -#ifdef PNG_READ_zTXt_SUPPORTED -/* Note: this does not correctly handle chunks that are > 64K under DOS */ -void /* PRIVATE */ -png_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - png_textp text_ptr; - png_charp text; - int comp_type; - int ret; - png_size_t slength, prefix_len, data_len; - - png_debug(1, "in png_handle_zTXt"); - -#ifdef PNG_USER_LIMITS_SUPPORTED - if (png_ptr->user_chunk_cache_max != 0) - { - if (png_ptr->user_chunk_cache_max == 1) - { - png_crc_finish(png_ptr, length); - return; - } - - if (--png_ptr->user_chunk_cache_max == 1) - { - png_warning(png_ptr, "No space in chunk cache for zTXt"); - png_crc_finish(png_ptr, length); - return; - } - } -#endif - - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before zTXt"); - - if (png_ptr->mode & PNG_HAVE_IDAT) - png_ptr->mode |= PNG_AFTER_IDAT; - -#ifdef PNG_MAX_MALLOC_64K - /* We will no doubt have problems with chunks even half this size, but - * there is no hard and fast rule to tell us where to stop. - */ - if (length > (png_uint_32)65535L) - { - png_warning(png_ptr, "zTXt chunk too large to fit in memory"); - png_crc_finish(png_ptr, length); - return; - } -#endif - - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = (png_charp)png_malloc_warn(png_ptr, length + 1); - - if (png_ptr->chunkdata == NULL) - { - png_warning(png_ptr, "Out of memory processing zTXt chunk"); - return; - } - - slength = length; - png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength); - - if (png_crc_finish(png_ptr, 0)) - { - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - return; - } - - png_ptr->chunkdata[slength] = 0x00; - - for (text = png_ptr->chunkdata; *text; text++) - /* Empty loop */ ; - - /* zTXt must have some text after the chunkdataword */ - if (text >= png_ptr->chunkdata + slength - 2) - { - png_warning(png_ptr, "Truncated zTXt chunk"); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - return; - } - - else - { - comp_type = *(++text); - - if (comp_type != PNG_TEXT_COMPRESSION_zTXt) - { - png_warning(png_ptr, "Unknown compression type in zTXt chunk"); - comp_type = PNG_TEXT_COMPRESSION_zTXt; - } - - text++; /* Skip the compression_method byte */ - } - - prefix_len = text - png_ptr->chunkdata; - - png_decompress_chunk(png_ptr, comp_type, - (png_size_t)length, prefix_len, &data_len); - - text_ptr = (png_textp)png_malloc_warn(png_ptr, - png_sizeof(png_text)); - - if (text_ptr == NULL) - { - png_warning(png_ptr, "Not enough memory to process zTXt chunk"); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - return; - } - - text_ptr->compression = comp_type; - text_ptr->key = png_ptr->chunkdata; - text_ptr->lang = NULL; - text_ptr->lang_key = NULL; - text_ptr->itxt_length = 0; - text_ptr->text = png_ptr->chunkdata + prefix_len; - text_ptr->text_length = data_len; - - ret = png_set_text_2(png_ptr, info_ptr, text_ptr, 1); - - png_free(png_ptr, text_ptr); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - - if (ret) - png_error(png_ptr, "Insufficient memory to store zTXt chunk"); -} -#endif - -#ifdef PNG_READ_iTXt_SUPPORTED -/* Note: this does not correctly handle chunks that are > 64K under DOS */ -void /* PRIVATE */ -png_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - png_textp text_ptr; - png_charp key, lang, text, lang_key; - int comp_flag; - int comp_type = 0; - int ret; - png_size_t slength, prefix_len, data_len; - - png_debug(1, "in png_handle_iTXt"); - -#ifdef PNG_USER_LIMITS_SUPPORTED - if (png_ptr->user_chunk_cache_max != 0) - { - if (png_ptr->user_chunk_cache_max == 1) - { - png_crc_finish(png_ptr, length); - return; - } - - if (--png_ptr->user_chunk_cache_max == 1) - { - png_warning(png_ptr, "No space in chunk cache for iTXt"); - png_crc_finish(png_ptr, length); - return; - } - } -#endif - - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before iTXt"); - - if (png_ptr->mode & PNG_HAVE_IDAT) - png_ptr->mode |= PNG_AFTER_IDAT; - -#ifdef PNG_MAX_MALLOC_64K - /* We will no doubt have problems with chunks even half this size, but - * there is no hard and fast rule to tell us where to stop. - */ - if (length > (png_uint_32)65535L) - { - png_warning(png_ptr, "iTXt chunk too large to fit in memory"); - png_crc_finish(png_ptr, length); - return; - } -#endif - - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = (png_charp)png_malloc_warn(png_ptr, length + 1); - - if (png_ptr->chunkdata == NULL) - { - png_warning(png_ptr, "No memory to process iTXt chunk"); - return; - } - - slength = length; - png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength); - - if (png_crc_finish(png_ptr, 0)) - { - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - return; - } - - png_ptr->chunkdata[slength] = 0x00; - - for (lang = png_ptr->chunkdata; *lang; lang++) - /* Empty loop */ ; - - lang++; /* Skip NUL separator */ - - /* iTXt must have a language tag (possibly empty), two compression bytes, - * translated keyword (possibly empty), and possibly some text after the - * keyword - */ - - if (lang >= png_ptr->chunkdata + slength - 3) - { - png_warning(png_ptr, "Truncated iTXt chunk"); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - return; - } - - else - { - comp_flag = *lang++; - comp_type = *lang++; - } - - if (comp_type || (comp_flag && comp_flag != PNG_TEXT_COMPRESSION_zTXt)) - { - png_warning(png_ptr, "Unknown iTXt compression type or method"); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - return; - } - - for (lang_key = lang; *lang_key; lang_key++) - /* Empty loop */ ; - - lang_key++; /* Skip NUL separator */ - - if (lang_key >= png_ptr->chunkdata + slength) - { - png_warning(png_ptr, "Truncated iTXt chunk"); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - return; - } - - for (text = lang_key; *text; text++) - /* Empty loop */ ; - - text++; /* Skip NUL separator */ - - if (text >= png_ptr->chunkdata + slength) - { - png_warning(png_ptr, "Malformed iTXt chunk"); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - return; - } - - prefix_len = text - png_ptr->chunkdata; - - key=png_ptr->chunkdata; - - if (comp_flag) - png_decompress_chunk(png_ptr, comp_type, - (size_t)length, prefix_len, &data_len); - - else - data_len = png_strlen(png_ptr->chunkdata + prefix_len); - - text_ptr = (png_textp)png_malloc_warn(png_ptr, - png_sizeof(png_text)); - - if (text_ptr == NULL) - { - png_warning(png_ptr, "Not enough memory to process iTXt chunk"); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - return; - } - - text_ptr->compression = (int)comp_flag + 1; - text_ptr->lang_key = png_ptr->chunkdata + (lang_key - key); - text_ptr->lang = png_ptr->chunkdata + (lang - key); - text_ptr->itxt_length = data_len; - text_ptr->text_length = 0; - text_ptr->key = png_ptr->chunkdata; - text_ptr->text = png_ptr->chunkdata + prefix_len; - - ret = png_set_text_2(png_ptr, info_ptr, text_ptr, 1); - - png_free(png_ptr, text_ptr); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - - if (ret) - png_error(png_ptr, "Insufficient memory to store iTXt chunk"); -} -#endif - -/* This function is called when we haven't found a handler for a - * chunk. If there isn't a problem with the chunk itself (ie bad - * chunk name, CRC, or a critical chunk), the chunk is silently ignored - * -- unless the PNG_FLAG_UNKNOWN_CHUNKS_SUPPORTED flag is on in which - * case it will be saved away to be written out later. - */ -void /* PRIVATE */ -png_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - png_uint_32 skip = 0; - - png_debug(1, "in png_handle_unknown"); - -#ifdef PNG_USER_LIMITS_SUPPORTED - if (png_ptr->user_chunk_cache_max != 0) - { - if (png_ptr->user_chunk_cache_max == 1) - { - png_crc_finish(png_ptr, length); - return; - } - - if (--png_ptr->user_chunk_cache_max == 1) - { - png_warning(png_ptr, "No space in chunk cache for unknown chunk"); - png_crc_finish(png_ptr, length); - return; - } - } -#endif - - if (png_ptr->mode & PNG_HAVE_IDAT) - { - if (png_ptr->chunk_name != png_IDAT) - png_ptr->mode |= PNG_AFTER_IDAT; - } - - if (PNG_CHUNK_CRITICAL(png_ptr->chunk_name)) - { -#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED - if (png_chunk_unknown_handling(png_ptr, png_ptr->chunk_name) != - PNG_HANDLE_CHUNK_ALWAYS -#ifdef PNG_READ_USER_CHUNKS_SUPPORTED - && png_ptr->read_user_chunk_fn == NULL -#endif - ) -#endif - png_chunk_error(png_ptr, "unknown critical chunk"); - } - -#ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED - if ((png_ptr->flags & PNG_FLAG_KEEP_UNKNOWN_CHUNKS) -#ifdef PNG_READ_USER_CHUNKS_SUPPORTED - || (png_ptr->read_user_chunk_fn != NULL) -#endif - ) - { -#ifdef PNG_MAX_MALLOC_64K - if (length > 65535) - { - png_warning(png_ptr, "unknown chunk too large to fit in memory"); - skip = length - 65535; - length = 65535; - } -#endif - - /* TODO: this code is very close to the unknown handling in pngpread.c, - * maybe it can be put into a common utility routine? - * png_struct::unknown_chunk is just used as a temporary variable, along - * with the data into which the chunk is read. These can be eliminated. - */ - PNG_CSTRING_FROM_CHUNK(png_ptr->unknown_chunk.name, png_ptr->chunk_name); - png_ptr->unknown_chunk.size = (png_size_t)length; - - if (length == 0) - png_ptr->unknown_chunk.data = NULL; - - else - { - png_ptr->unknown_chunk.data = (png_bytep)png_malloc(png_ptr, length); - png_crc_read(png_ptr, png_ptr->unknown_chunk.data, length); - } - -#ifdef PNG_READ_USER_CHUNKS_SUPPORTED - if (png_ptr->read_user_chunk_fn != NULL) - { - /* Callback to user unknown chunk handler */ - int ret; - - ret = (*(png_ptr->read_user_chunk_fn)) - (png_ptr, &png_ptr->unknown_chunk); - - if (ret < 0) - png_chunk_error(png_ptr, "error in user chunk"); - - if (ret == 0) - { - if (PNG_CHUNK_CRITICAL(png_ptr->chunk_name)) - { -#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED - if (png_chunk_unknown_handling(png_ptr, png_ptr->chunk_name) != - PNG_HANDLE_CHUNK_ALWAYS) -#endif - png_chunk_error(png_ptr, "unknown critical chunk"); - } - - png_set_unknown_chunks(png_ptr, info_ptr, - &png_ptr->unknown_chunk, 1); - } - } - - else -#endif - png_set_unknown_chunks(png_ptr, info_ptr, &png_ptr->unknown_chunk, 1); - - png_free(png_ptr, png_ptr->unknown_chunk.data); - png_ptr->unknown_chunk.data = NULL; - } - - else -#endif - skip = length; - - png_crc_finish(png_ptr, skip); - -#ifndef PNG_READ_USER_CHUNKS_SUPPORTED - PNG_UNUSED(info_ptr) /* Quiet compiler warnings about unused info_ptr */ -#endif -} - -/* This function is called to verify that a chunk name is valid. - * This function can't have the "critical chunk check" incorporated - * into it, since in the future we will need to be able to call user - * functions to handle unknown critical chunks after we check that - * the chunk name itself is valid. - */ - -/* Bit hacking: the test for an invalid byte in the 4 byte chunk name is: - * - * ((c) < 65 || (c) > 122 || ((c) > 90 && (c) < 97)) - */ - -void /* PRIVATE */ -png_check_chunk_name(png_structp png_ptr, png_uint_32 chunk_name) -{ - int i; - - png_debug(1, "in png_check_chunk_name"); - - for (i=1; i<=4; ++i) - { - int c = chunk_name & 0xff; - - if (c < 65 || c > 122 || (c > 90 && c < 97)) - png_chunk_error(png_ptr, "invalid chunk type"); - - chunk_name >>= 8; - } -} - -/* Combines the row recently read in with the existing pixels in the row. This - * routine takes care of alpha and transparency if requested. This routine also - * handles the two methods of progressive display of interlaced images, - * depending on the 'display' value; if 'display' is true then the whole row - * (dp) is filled from the start by replicating the available pixels. If - * 'display' is false only those pixels present in the pass are filled in. - */ -void /* PRIVATE */ -png_combine_row(png_structp png_ptr, png_bytep dp, int display) -{ - unsigned int pixel_depth = png_ptr->transformed_pixel_depth; - png_const_bytep sp = png_ptr->row_buf + 1; - png_uint_32 row_width = png_ptr->width; - unsigned int pass = png_ptr->pass; - png_bytep end_ptr = 0; - png_byte end_byte = 0; - unsigned int end_mask; - - png_debug(1, "in png_combine_row"); - - /* Added in 1.5.6: it should not be possible to enter this routine until at - * least one row has been read from the PNG data and transformed. - */ - if (pixel_depth == 0) - png_error(png_ptr, "internal row logic error"); - - /* Added in 1.5.4: the pixel depth should match the information returned by - * any call to png_read_update_info at this point. Do not continue if we got - * this wrong. - */ - if (png_ptr->info_rowbytes != 0 && png_ptr->info_rowbytes != - PNG_ROWBYTES(pixel_depth, row_width)) - png_error(png_ptr, "internal row size calculation error"); - - /* Don't expect this to ever happen: */ - if (row_width == 0) - png_error(png_ptr, "internal row width error"); - - /* Preserve the last byte in cases where only part of it will be overwritten, - * the multiply below may overflow, we don't care because ANSI-C guarantees - * we get the low bits. - */ - end_mask = (pixel_depth * row_width) & 7; - if (end_mask != 0) - { - /* end_ptr == NULL is a flag to say do nothing */ - end_ptr = dp + PNG_ROWBYTES(pixel_depth, row_width) - 1; - end_byte = *end_ptr; -# ifdef PNG_READ_PACKSWAP_SUPPORTED - if (png_ptr->transformations & PNG_PACKSWAP) /* little-endian byte */ - end_mask = 0xff << end_mask; - - else /* big-endian byte */ -# endif - end_mask = 0xff >> end_mask; - /* end_mask is now the bits to *keep* from the destination row */ - } - - /* For non-interlaced images this reduces to a png_memcpy(). A png_memcpy() - * will also happen if interlacing isn't supported or if the application - * does not call png_set_interlace_handling(). In the latter cases the - * caller just gets a sequence of the unexpanded rows from each interlace - * pass. - */ -#ifdef PNG_READ_INTERLACING_SUPPORTED - if (png_ptr->interlaced && (png_ptr->transformations & PNG_INTERLACE) && - pass < 6 && (display == 0 || - /* The following copies everything for 'display' on passes 0, 2 and 4. */ - (display == 1 && (pass & 1) != 0))) - { - /* Narrow images may have no bits in a pass; the caller should handle - * this, but this test is cheap: - */ - if (row_width <= PNG_PASS_START_COL(pass)) - return; - - if (pixel_depth < 8) - { - /* For pixel depths up to 4 bpp the 8-pixel mask can be expanded to fit - * into 32 bits, then a single loop over the bytes using the four byte - * values in the 32-bit mask can be used. For the 'display' option the - * expanded mask may also not require any masking within a byte. To - * make this work the PACKSWAP option must be taken into account - it - * simply requires the pixels to be reversed in each byte. - * - * The 'regular' case requires a mask for each of the first 6 passes, - * the 'display' case does a copy for the even passes in the range - * 0..6. This has already been handled in the test above. - * - * The masks are arranged as four bytes with the first byte to use in - * the lowest bits (little-endian) regardless of the order (PACKSWAP or - * not) of the pixels in each byte. - * - * NOTE: the whole of this logic depends on the caller of this function - * only calling it on rows appropriate to the pass. This function only - * understands the 'x' logic; the 'y' logic is handled by the caller. - * - * The following defines allow generation of compile time constant bit - * masks for each pixel depth and each possibility of swapped or not - * swapped bytes. Pass 'p' is in the range 0..6; 'x', a pixel index, - * is in the range 0..7; and the result is 1 if the pixel is to be - * copied in the pass, 0 if not. 'S' is for the sparkle method, 'B' - * for the block method. - * - * With some compilers a compile time expression of the general form: - * - * (shift >= 32) ? (a >> (shift-32)) : (b >> shift) - * - * Produces warnings with values of 'shift' in the range 33 to 63 - * because the right hand side of the ?: expression is evaluated by - * the compiler even though it isn't used. Microsoft Visual C (various - * versions) and the Intel C compiler are known to do this. To avoid - * this the following macros are used in 1.5.6. This is a temporary - * solution to avoid destabilizing the code during the release process. - */ -# if PNG_USE_COMPILE_TIME_MASKS -# define PNG_LSR(x,s) ((x)>>((s) & 0x1f)) -# define PNG_LSL(x,s) ((x)<<((s) & 0x1f)) -# else -# define PNG_LSR(x,s) ((x)>>(s)) -# define PNG_LSL(x,s) ((x)<<(s)) -# endif -# define S_COPY(p,x) (((p)<4 ? PNG_LSR(0x80088822,(3-(p))*8+(7-(x))) :\ - PNG_LSR(0xaa55ff00,(7-(p))*8+(7-(x)))) & 1) -# define B_COPY(p,x) (((p)<4 ? PNG_LSR(0xff0fff33,(3-(p))*8+(7-(x))) :\ - PNG_LSR(0xff55ff00,(7-(p))*8+(7-(x)))) & 1) - - /* Return a mask for pass 'p' pixel 'x' at depth 'd'. The mask is - * little endian - the first pixel is at bit 0 - however the extra - * parameter 's' can be set to cause the mask position to be swapped - * within each byte, to match the PNG format. This is done by XOR of - * the shift with 7, 6 or 4 for bit depths 1, 2 and 4. - */ -# define PIXEL_MASK(p,x,d,s) \ - (PNG_LSL(((PNG_LSL(1U,(d)))-1),(((x)*(d))^((s)?8-(d):0)))) - - /* Hence generate the appropriate 'block' or 'sparkle' pixel copy mask. - */ -# define S_MASKx(p,x,d,s) (S_COPY(p,x)?PIXEL_MASK(p,x,d,s):0) -# define B_MASKx(p,x,d,s) (B_COPY(p,x)?PIXEL_MASK(p,x,d,s):0) - - /* Combine 8 of these to get the full mask. For the 1-bpp and 2-bpp - * cases the result needs replicating, for the 4-bpp case the above - * generates a full 32 bits. - */ -# define MASK_EXPAND(m,d) ((m)*((d)==1?0x01010101:((d)==2?0x00010001:1))) - -# define S_MASK(p,d,s) MASK_EXPAND(S_MASKx(p,0,d,s) + S_MASKx(p,1,d,s) +\ - S_MASKx(p,2,d,s) + S_MASKx(p,3,d,s) + S_MASKx(p,4,d,s) +\ - S_MASKx(p,5,d,s) + S_MASKx(p,6,d,s) + S_MASKx(p,7,d,s), d) - -# define B_MASK(p,d,s) MASK_EXPAND(B_MASKx(p,0,d,s) + B_MASKx(p,1,d,s) +\ - B_MASKx(p,2,d,s) + B_MASKx(p,3,d,s) + B_MASKx(p,4,d,s) +\ - B_MASKx(p,5,d,s) + B_MASKx(p,6,d,s) + B_MASKx(p,7,d,s), d) - -#if PNG_USE_COMPILE_TIME_MASKS - /* Utility macros to construct all the masks for a depth/swap - * combination. The 's' parameter says whether the format is PNG - * (big endian bytes) or not. Only the three odd-numbered passes are - * required for the display/block algorithm. - */ -# define S_MASKS(d,s) { S_MASK(0,d,s), S_MASK(1,d,s), S_MASK(2,d,s),\ - S_MASK(3,d,s), S_MASK(4,d,s), S_MASK(5,d,s) } - -# define B_MASKS(d,s) { B_MASK(1,d,s), S_MASK(3,d,s), S_MASK(5,d,s) } - -# define DEPTH_INDEX(d) ((d)==1?0:((d)==2?1:2)) - - /* Hence the pre-compiled masks indexed by PACKSWAP (or not), depth and - * then pass: - */ - static PNG_CONST png_uint_32 row_mask[2/*PACKSWAP*/][3/*depth*/][6] = - { - /* Little-endian byte masks for PACKSWAP */ - { S_MASKS(1,0), S_MASKS(2,0), S_MASKS(4,0) }, - /* Normal (big-endian byte) masks - PNG format */ - { S_MASKS(1,1), S_MASKS(2,1), S_MASKS(4,1) } - }; - - /* display_mask has only three entries for the odd passes, so index by - * pass>>1. - */ - static PNG_CONST png_uint_32 display_mask[2][3][3] = - { - /* Little-endian byte masks for PACKSWAP */ - { B_MASKS(1,0), B_MASKS(2,0), B_MASKS(4,0) }, - /* Normal (big-endian byte) masks - PNG format */ - { B_MASKS(1,1), B_MASKS(2,1), B_MASKS(4,1) } - }; - -# define MASK(pass,depth,display,png)\ - ((display)?display_mask[png][DEPTH_INDEX(depth)][pass>>1]:\ - row_mask[png][DEPTH_INDEX(depth)][pass]) - -#else /* !PNG_USE_COMPILE_TIME_MASKS */ - /* This is the runtime alternative: it seems unlikely that this will - * ever be either smaller or faster than the compile time approach. - */ -# define MASK(pass,depth,display,png)\ - ((display)?B_MASK(pass,depth,png):S_MASK(pass,depth,png)) -#endif /* !PNG_USE_COMPILE_TIME_MASKS */ - - /* Use the appropriate mask to copy the required bits. In some cases - * the byte mask will be 0 or 0xff, optimize these cases. row_width is - * the number of pixels, but the code copies bytes, so it is necessary - * to special case the end. - */ - png_uint_32 pixels_per_byte = 8 / pixel_depth; - png_uint_32 mask; - -# ifdef PNG_READ_PACKSWAP_SUPPORTED - if (png_ptr->transformations & PNG_PACKSWAP) - mask = MASK(pass, pixel_depth, display, 0); - - else -# endif - mask = MASK(pass, pixel_depth, display, 1); - - for (;;) - { - png_uint_32 m; - - /* It doesn't matter in the following if png_uint_32 has more than - * 32 bits because the high bits always match those in m<<24; it is, - * however, essential to use OR here, not +, because of this. - */ - m = mask; - mask = (m >> 8) | (m << 24); /* rotate right to good compilers */ - m &= 0xff; - - if (m != 0) /* something to copy */ - { - if (m != 0xff) - *dp = (png_byte)((*dp & ~m) | (*sp & m)); - else - *dp = *sp; - } - - /* NOTE: this may overwrite the last byte with garbage if the image - * is not an exact number of bytes wide; libpng has always done - * this. - */ - if (row_width <= pixels_per_byte) - break; /* May need to restore part of the last byte */ - - row_width -= pixels_per_byte; - ++dp; - ++sp; - } - } - - else /* pixel_depth >= 8 */ - { - unsigned int bytes_to_copy, bytes_to_jump; - - /* Validate the depth - it must be a multiple of 8 */ - if (pixel_depth & 7) - png_error(png_ptr, "invalid user transform pixel depth"); - - pixel_depth >>= 3; /* now in bytes */ - row_width *= pixel_depth; - - /* Regardless of pass number the Adam 7 interlace always results in a - * fixed number of pixels to copy then to skip. There may be a - * different number of pixels to skip at the start though. - */ - { - unsigned int offset = PNG_PASS_START_COL(pass) * pixel_depth; - - row_width -= offset; - dp += offset; - sp += offset; - } - - /* Work out the bytes to copy. */ - if (display) - { - /* When doing the 'block' algorithm the pixel in the pass gets - * replicated to adjacent pixels. This is why the even (0,2,4,6) - * passes are skipped above - the entire expanded row is copied. - */ - bytes_to_copy = (1<<((6-pass)>>1)) * pixel_depth; - - /* But don't allow this number to exceed the actual row width. */ - if (bytes_to_copy > row_width) - bytes_to_copy = row_width; - } - - else /* normal row; Adam7 only ever gives us one pixel to copy. */ - bytes_to_copy = pixel_depth; - - /* In Adam7 there is a constant offset between where the pixels go. */ - bytes_to_jump = PNG_PASS_COL_OFFSET(pass) * pixel_depth; - - /* And simply copy these bytes. Some optimization is possible here, - * depending on the value of 'bytes_to_copy'. Special case the low - * byte counts, which we know to be frequent. - * - * Notice that these cases all 'return' rather than 'break' - this - * avoids an unnecessary test on whether to restore the last byte - * below. - */ - switch (bytes_to_copy) - { - case 1: - for (;;) - { - *dp = *sp; - - if (row_width <= bytes_to_jump) - return; - - dp += bytes_to_jump; - sp += bytes_to_jump; - row_width -= bytes_to_jump; - } - - case 2: - /* There is a possibility of a partial copy at the end here; this - * slows the code down somewhat. - */ - do - { - dp[0] = sp[0], dp[1] = sp[1]; - - if (row_width <= bytes_to_jump) - return; - - sp += bytes_to_jump; - dp += bytes_to_jump; - row_width -= bytes_to_jump; - } - while (row_width > 1); - - /* And there can only be one byte left at this point: */ - *dp = *sp; - return; - - case 3: - /* This can only be the RGB case, so each copy is exactly one - * pixel and it is not necessary to check for a partial copy. - */ - for(;;) - { - dp[0] = sp[0], dp[1] = sp[1], dp[2] = sp[2]; - - if (row_width <= bytes_to_jump) - return; - - sp += bytes_to_jump; - dp += bytes_to_jump; - row_width -= bytes_to_jump; - } - - default: -#if PNG_ALIGN_TYPE != PNG_ALIGN_NONE - /* Check for double byte alignment and, if possible, use a - * 16-bit copy. Don't attempt this for narrow images - ones that - * are less than an interlace panel wide. Don't attempt it for - * wide bytes_to_copy either - use the png_memcpy there. - */ - if (bytes_to_copy < 16 /*else use png_memcpy*/ && - png_isaligned(dp, png_uint_16) && - png_isaligned(sp, png_uint_16) && - bytes_to_copy % sizeof (png_uint_16) == 0 && - bytes_to_jump % sizeof (png_uint_16) == 0) - { - /* Everything is aligned for png_uint_16 copies, but try for - * png_uint_32 first. - */ - if (png_isaligned(dp, png_uint_32) && - png_isaligned(sp, png_uint_32) && - bytes_to_copy % sizeof (png_uint_32) == 0 && - bytes_to_jump % sizeof (png_uint_32) == 0) - { - png_uint_32p dp32 = (png_uint_32p)dp; - png_const_uint_32p sp32 = (png_const_uint_32p)sp; - unsigned int skip = (bytes_to_jump-bytes_to_copy) / - sizeof (png_uint_32); - - do - { - size_t c = bytes_to_copy; - do - { - *dp32++ = *sp32++; - c -= sizeof (png_uint_32); - } - while (c > 0); - - if (row_width <= bytes_to_jump) - return; - - dp32 += skip; - sp32 += skip; - row_width -= bytes_to_jump; - } - while (bytes_to_copy <= row_width); - - /* Get to here when the row_width truncates the final copy. - * There will be 1-3 bytes left to copy, so don't try the - * 16-bit loop below. - */ - dp = (png_bytep)dp32; - sp = (png_const_bytep)sp32; - do - *dp++ = *sp++; - while (--row_width > 0); - return; - } - - /* Else do it in 16-bit quantities, but only if the size is - * not too large. - */ - else - { - png_uint_16p dp16 = (png_uint_16p)dp; - png_const_uint_16p sp16 = (png_const_uint_16p)sp; - unsigned int skip = (bytes_to_jump-bytes_to_copy) / - sizeof (png_uint_16); - - do - { - size_t c = bytes_to_copy; - do - { - *dp16++ = *sp16++; - c -= sizeof (png_uint_16); - } - while (c > 0); - - if (row_width <= bytes_to_jump) - return; - - dp16 += skip; - sp16 += skip; - row_width -= bytes_to_jump; - } - while (bytes_to_copy <= row_width); - - /* End of row - 1 byte left, bytes_to_copy > row_width: */ - dp = (png_bytep)dp16; - sp = (png_const_bytep)sp16; - do - *dp++ = *sp++; - while (--row_width > 0); - return; - } - } -#endif /* PNG_ALIGN_ code */ - - /* The true default - use a png_memcpy: */ - for (;;) - { - png_memcpy(dp, sp, bytes_to_copy); - - if (row_width <= bytes_to_jump) - return; - - sp += bytes_to_jump; - dp += bytes_to_jump; - row_width -= bytes_to_jump; - if (bytes_to_copy > row_width) - bytes_to_copy = row_width; - } - } - - /* NOT REACHED*/ - } /* pixel_depth >= 8 */ - - /* Here if pixel_depth < 8 to check 'end_ptr' below. */ - } - else -#endif - - /* If here then the switch above wasn't used so just png_memcpy the whole row - * from the temporary row buffer (notice that this overwrites the end of the - * destination row if it is a partial byte.) - */ - png_memcpy(dp, sp, PNG_ROWBYTES(pixel_depth, row_width)); - - /* Restore the overwritten bits from the last byte if necessary. */ - if (end_ptr != NULL) - *end_ptr = (png_byte)((end_byte & end_mask) | (*end_ptr & ~end_mask)); -} - -#ifdef PNG_READ_INTERLACING_SUPPORTED -void /* PRIVATE */ -png_do_read_interlace(png_row_infop row_info, png_bytep row, int pass, - png_uint_32 transformations /* Because these may affect the byte layout */) -{ - /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */ - /* Offset to next interlace block */ - static PNG_CONST int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1}; - - png_debug(1, "in png_do_read_interlace"); - if (row != NULL && row_info != NULL) - { - png_uint_32 final_width; - - final_width = row_info->width * png_pass_inc[pass]; - - switch (row_info->pixel_depth) - { - case 1: - { - png_bytep sp = row + (png_size_t)((row_info->width - 1) >> 3); - png_bytep dp = row + (png_size_t)((final_width - 1) >> 3); - int sshift, dshift; - int s_start, s_end, s_inc; - int jstop = png_pass_inc[pass]; - png_byte v; - png_uint_32 i; - int j; - -#ifdef PNG_READ_PACKSWAP_SUPPORTED - if (transformations & PNG_PACKSWAP) - { - sshift = (int)((row_info->width + 7) & 0x07); - dshift = (int)((final_width + 7) & 0x07); - s_start = 7; - s_end = 0; - s_inc = -1; - } - - else -#endif - { - sshift = 7 - (int)((row_info->width + 7) & 0x07); - dshift = 7 - (int)((final_width + 7) & 0x07); - s_start = 0; - s_end = 7; - s_inc = 1; - } - - for (i = 0; i < row_info->width; i++) - { - v = (png_byte)((*sp >> sshift) & 0x01); - for (j = 0; j < jstop; j++) - { - *dp &= (png_byte)((0x7f7f >> (7 - dshift)) & 0xff); - *dp |= (png_byte)(v << dshift); - - if (dshift == s_end) - { - dshift = s_start; - dp--; - } - - else - dshift += s_inc; - } - - if (sshift == s_end) - { - sshift = s_start; - sp--; - } - - else - sshift += s_inc; - } - break; - } - - case 2: - { - png_bytep sp = row + (png_uint_32)((row_info->width - 1) >> 2); - png_bytep dp = row + (png_uint_32)((final_width - 1) >> 2); - int sshift, dshift; - int s_start, s_end, s_inc; - int jstop = png_pass_inc[pass]; - png_uint_32 i; - -#ifdef PNG_READ_PACKSWAP_SUPPORTED - if (transformations & PNG_PACKSWAP) - { - sshift = (int)(((row_info->width + 3) & 0x03) << 1); - dshift = (int)(((final_width + 3) & 0x03) << 1); - s_start = 6; - s_end = 0; - s_inc = -2; - } - - else -#endif - { - sshift = (int)((3 - ((row_info->width + 3) & 0x03)) << 1); - dshift = (int)((3 - ((final_width + 3) & 0x03)) << 1); - s_start = 0; - s_end = 6; - s_inc = 2; - } - - for (i = 0; i < row_info->width; i++) - { - png_byte v; - int j; - - v = (png_byte)((*sp >> sshift) & 0x03); - for (j = 0; j < jstop; j++) - { - *dp &= (png_byte)((0x3f3f >> (6 - dshift)) & 0xff); - *dp |= (png_byte)(v << dshift); - - if (dshift == s_end) - { - dshift = s_start; - dp--; - } - - else - dshift += s_inc; - } - - if (sshift == s_end) - { - sshift = s_start; - sp--; - } - - else - sshift += s_inc; - } - break; - } - - case 4: - { - png_bytep sp = row + (png_size_t)((row_info->width - 1) >> 1); - png_bytep dp = row + (png_size_t)((final_width - 1) >> 1); - int sshift, dshift; - int s_start, s_end, s_inc; - png_uint_32 i; - int jstop = png_pass_inc[pass]; - -#ifdef PNG_READ_PACKSWAP_SUPPORTED - if (transformations & PNG_PACKSWAP) - { - sshift = (int)(((row_info->width + 1) & 0x01) << 2); - dshift = (int)(((final_width + 1) & 0x01) << 2); - s_start = 4; - s_end = 0; - s_inc = -4; - } - - else -#endif - { - sshift = (int)((1 - ((row_info->width + 1) & 0x01)) << 2); - dshift = (int)((1 - ((final_width + 1) & 0x01)) << 2); - s_start = 0; - s_end = 4; - s_inc = 4; - } - - for (i = 0; i < row_info->width; i++) - { - png_byte v = (png_byte)((*sp >> sshift) & 0x0f); - int j; - - for (j = 0; j < jstop; j++) - { - *dp &= (png_byte)((0xf0f >> (4 - dshift)) & 0xff); - *dp |= (png_byte)(v << dshift); - - if (dshift == s_end) - { - dshift = s_start; - dp--; - } - - else - dshift += s_inc; - } - - if (sshift == s_end) - { - sshift = s_start; - sp--; - } - - else - sshift += s_inc; - } - break; - } - - default: - { - png_size_t pixel_bytes = (row_info->pixel_depth >> 3); - - png_bytep sp = row + (png_size_t)(row_info->width - 1) - * pixel_bytes; - - png_bytep dp = row + (png_size_t)(final_width - 1) * pixel_bytes; - - int jstop = png_pass_inc[pass]; - png_uint_32 i; - - for (i = 0; i < row_info->width; i++) - { - png_byte v[8]; - int j; - - png_memcpy(v, sp, pixel_bytes); - - for (j = 0; j < jstop; j++) - { - png_memcpy(dp, v, pixel_bytes); - dp -= pixel_bytes; - } - - sp -= pixel_bytes; - } - break; - } - } - - row_info->width = final_width; - row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, final_width); - } -#ifndef PNG_READ_PACKSWAP_SUPPORTED - PNG_UNUSED(transformations) /* Silence compiler warning */ -#endif -} -#endif /* PNG_READ_INTERLACING_SUPPORTED */ - -static void -png_read_filter_row_sub(png_row_infop row_info, png_bytep row, - png_const_bytep prev_row) -{ - png_size_t i; - png_size_t istop = row_info->rowbytes; - unsigned int bpp = (row_info->pixel_depth + 7) >> 3; - png_bytep rp = row + bpp; - - PNG_UNUSED(prev_row) - - for (i = bpp; i < istop; i++) - { - *rp = (png_byte)(((int)(*rp) + (int)(*(rp-bpp))) & 0xff); - rp++; - } -} - -static void -png_read_filter_row_up(png_row_infop row_info, png_bytep row, - png_const_bytep prev_row) -{ - png_size_t i; - png_size_t istop = row_info->rowbytes; - png_bytep rp = row; - png_const_bytep pp = prev_row; - - for (i = 0; i < istop; i++) - { - *rp = (png_byte)(((int)(*rp) + (int)(*pp++)) & 0xff); - rp++; - } -} - -static void -png_read_filter_row_avg(png_row_infop row_info, png_bytep row, - png_const_bytep prev_row) -{ - png_size_t i; - png_bytep rp = row; - png_const_bytep pp = prev_row; - unsigned int bpp = (row_info->pixel_depth + 7) >> 3; - png_size_t istop = row_info->rowbytes - bpp; - - for (i = 0; i < bpp; i++) - { - *rp = (png_byte)(((int)(*rp) + - ((int)(*pp++) / 2 )) & 0xff); - - rp++; - } - - for (i = 0; i < istop; i++) - { - *rp = (png_byte)(((int)(*rp) + - (int)(*pp++ + *(rp-bpp)) / 2 ) & 0xff); - - rp++; - } -} - -static void -png_read_filter_row_paeth_1byte_pixel(png_row_infop row_info, png_bytep row, - png_const_bytep prev_row) -{ - png_bytep rp_end = row + row_info->rowbytes; - int a, c; - - /* First pixel/byte */ - c = *prev_row++; - a = *row + c; - *row++ = (png_byte)a; - - /* Remainder */ - while (row < rp_end) - { - int b, pa, pb, pc, p; - - a &= 0xff; /* From previous iteration or start */ - b = *prev_row++; - - p = b - c; - pc = a - c; - -# ifdef PNG_USE_ABS - pa = abs(p); - pb = abs(pc); - pc = abs(p + pc); -# else - pa = p < 0 ? -p : p; - pb = pc < 0 ? -pc : pc; - pc = (p + pc) < 0 ? -(p + pc) : p + pc; -# endif - - /* Find the best predictor, the least of pa, pb, pc favoring the earlier - * ones in the case of a tie. - */ - if (pb < pa) pa = pb, a = b; - if (pc < pa) a = c; - - /* Calculate the current pixel in a, and move the previous row pixel to c - * for the next time round the loop - */ - c = b; - a += *row; - *row++ = (png_byte)a; - } -} - -static void -png_read_filter_row_paeth_multibyte_pixel(png_row_infop row_info, png_bytep row, - png_const_bytep prev_row) -{ - int bpp = (row_info->pixel_depth + 7) >> 3; - png_bytep rp_end = row + bpp; - - /* Process the first pixel in the row completely (this is the same as 'up' - * because there is only one candidate predictor for the first row). - */ - while (row < rp_end) - { - int a = *row + *prev_row++; - *row++ = (png_byte)a; - } - - /* Remainder */ - rp_end += row_info->rowbytes - bpp; - - while (row < rp_end) - { - int a, b, c, pa, pb, pc, p; - - c = *(prev_row - bpp); - a = *(row - bpp); - b = *prev_row++; - - p = b - c; - pc = a - c; - -# ifdef PNG_USE_ABS - pa = abs(p); - pb = abs(pc); - pc = abs(p + pc); -# else - pa = p < 0 ? -p : p; - pb = pc < 0 ? -pc : pc; - pc = (p + pc) < 0 ? -(p + pc) : p + pc; -# endif - - if (pb < pa) pa = pb, a = b; - if (pc < pa) a = c; - - c = b; - a += *row; - *row++ = (png_byte)a; - } -} - -#ifdef PNG_ARM_NEON - -#ifdef __linux__ -#include -#include -#include - -static int png_have_hwcap(unsigned cap) -{ - FILE *f = fopen("/proc/self/auxv", "r"); - Elf32_auxv_t aux; - int have_cap = 0; - - if (!f) - return 0; - - while (fread(&aux, sizeof(aux), 1, f) > 0) - { - if (aux.a_type == AT_HWCAP && - aux.a_un.a_val & cap) - { - have_cap = 1; - break; - } - } - - fclose(f); - - return have_cap; -} -#endif /* __linux__ */ - -static void -png_init_filter_functions_neon(png_structp pp, unsigned int bpp) -{ -#ifdef __linux__ - if (!png_have_hwcap(HWCAP_NEON)) - return; -#endif - - pp->read_filter[PNG_FILTER_VALUE_UP-1] = png_read_filter_row_up_neon; - - if (bpp == 3) - { - pp->read_filter[PNG_FILTER_VALUE_SUB-1] = png_read_filter_row_sub3_neon; - pp->read_filter[PNG_FILTER_VALUE_AVG-1] = png_read_filter_row_avg3_neon; - pp->read_filter[PNG_FILTER_VALUE_PAETH-1] = - png_read_filter_row_paeth3_neon; - } - - else if (bpp == 4) - { - pp->read_filter[PNG_FILTER_VALUE_SUB-1] = png_read_filter_row_sub4_neon; - pp->read_filter[PNG_FILTER_VALUE_AVG-1] = png_read_filter_row_avg4_neon; - pp->read_filter[PNG_FILTER_VALUE_PAETH-1] = - png_read_filter_row_paeth4_neon; - } -} -#endif /* PNG_ARM_NEON */ - -static void -png_init_filter_functions(png_structp pp) -{ - unsigned int bpp = (pp->pixel_depth + 7) >> 3; - - pp->read_filter[PNG_FILTER_VALUE_SUB-1] = png_read_filter_row_sub; - pp->read_filter[PNG_FILTER_VALUE_UP-1] = png_read_filter_row_up; - pp->read_filter[PNG_FILTER_VALUE_AVG-1] = png_read_filter_row_avg; - if (bpp == 1) - pp->read_filter[PNG_FILTER_VALUE_PAETH-1] = - png_read_filter_row_paeth_1byte_pixel; - else - pp->read_filter[PNG_FILTER_VALUE_PAETH-1] = - png_read_filter_row_paeth_multibyte_pixel; - -#ifdef PNG_ARM_NEON - png_init_filter_functions_neon(pp, bpp); -#endif -} - -void /* PRIVATE */ -png_read_filter_row(png_structp pp, png_row_infop row_info, png_bytep row, - png_const_bytep prev_row, int filter) -{ - if (pp->read_filter[0] == NULL) - png_init_filter_functions(pp); - if (filter > PNG_FILTER_VALUE_NONE && filter < PNG_FILTER_VALUE_LAST) - pp->read_filter[filter-1](row_info, row, prev_row); -} - -#ifdef PNG_SEQUENTIAL_READ_SUPPORTED -void /* PRIVATE */ -png_read_finish_row(png_structp png_ptr) -{ -#ifdef PNG_READ_INTERLACING_SUPPORTED - /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */ - - /* Start of interlace block */ - static PNG_CONST png_byte png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0}; - - /* Offset to next interlace block */ - static PNG_CONST png_byte png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1}; - - /* Start of interlace block in the y direction */ - static PNG_CONST png_byte png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1}; - - /* Offset to next interlace block in the y direction */ - static PNG_CONST png_byte png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2}; -#endif /* PNG_READ_INTERLACING_SUPPORTED */ - - png_debug(1, "in png_read_finish_row"); - png_ptr->row_number++; - if (png_ptr->row_number < png_ptr->num_rows) - return; - -#ifdef PNG_READ_INTERLACING_SUPPORTED - if (png_ptr->interlaced) - { - png_ptr->row_number = 0; - - /* TO DO: don't do this if prev_row isn't needed (requires - * read-ahead of the next row's filter byte. - */ - png_memset(png_ptr->prev_row, 0, png_ptr->rowbytes + 1); - - do - { - png_ptr->pass++; - - if (png_ptr->pass >= 7) - break; - - png_ptr->iwidth = (png_ptr->width + - png_pass_inc[png_ptr->pass] - 1 - - png_pass_start[png_ptr->pass]) / - png_pass_inc[png_ptr->pass]; - - if (!(png_ptr->transformations & PNG_INTERLACE)) - { - png_ptr->num_rows = (png_ptr->height + - png_pass_yinc[png_ptr->pass] - 1 - - png_pass_ystart[png_ptr->pass]) / - png_pass_yinc[png_ptr->pass]; - } - - else /* if (png_ptr->transformations & PNG_INTERLACE) */ - break; /* libpng deinterlacing sees every row */ - - } while (png_ptr->num_rows == 0 || png_ptr->iwidth == 0); - - if (png_ptr->pass < 7) - return; - } -#endif /* PNG_READ_INTERLACING_SUPPORTED */ - - if (!(png_ptr->flags & PNG_FLAG_ZLIB_FINISHED)) - { - char extra; - int ret; - - png_ptr->zstream.next_out = (Byte *)&extra; - png_ptr->zstream.avail_out = (uInt)1; - - for (;;) - { - if (!(png_ptr->zstream.avail_in)) - { - while (!png_ptr->idat_size) - { - png_crc_finish(png_ptr, 0); - png_ptr->idat_size = png_read_chunk_header(png_ptr); - if (png_ptr->chunk_name != png_IDAT) - png_error(png_ptr, "Not enough image data"); - } - - png_ptr->zstream.avail_in = (uInt)png_ptr->zbuf_size; - png_ptr->zstream.next_in = png_ptr->zbuf; - - if (png_ptr->zbuf_size > png_ptr->idat_size) - png_ptr->zstream.avail_in = (uInt)png_ptr->idat_size; - - png_crc_read(png_ptr, png_ptr->zbuf, png_ptr->zstream.avail_in); - png_ptr->idat_size -= png_ptr->zstream.avail_in; - } - - ret = inflate(&png_ptr->zstream, Z_PARTIAL_FLUSH); - - if (ret == Z_STREAM_END) - { - if (!(png_ptr->zstream.avail_out) || png_ptr->zstream.avail_in || - png_ptr->idat_size) - png_warning(png_ptr, "Extra compressed data"); - - png_ptr->mode |= PNG_AFTER_IDAT; - png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED; - break; - } - - if (ret != Z_OK) - png_error(png_ptr, png_ptr->zstream.msg ? png_ptr->zstream.msg : - "Decompression Error"); - - if (!(png_ptr->zstream.avail_out)) - { - png_warning(png_ptr, "Extra compressed data"); - png_ptr->mode |= PNG_AFTER_IDAT; - png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED; - break; - } - - } - png_ptr->zstream.avail_out = 0; - } - - if (png_ptr->idat_size || png_ptr->zstream.avail_in) - png_warning(png_ptr, "Extra compression data"); - - inflateReset(&png_ptr->zstream); - - png_ptr->mode |= PNG_AFTER_IDAT; -} -#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */ - -void /* PRIVATE */ -png_read_start_row(png_structp png_ptr) -{ -#ifdef PNG_READ_INTERLACING_SUPPORTED - /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */ - - /* Start of interlace block */ - static PNG_CONST png_byte png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0}; - - /* Offset to next interlace block */ - static PNG_CONST png_byte png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1}; - - /* Start of interlace block in the y direction */ - static PNG_CONST png_byte png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1}; - - /* Offset to next interlace block in the y direction */ - static PNG_CONST png_byte png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2}; -#endif - - int max_pixel_depth; - png_size_t row_bytes; - - png_debug(1, "in png_read_start_row"); - png_ptr->zstream.avail_in = 0; -#ifdef PNG_READ_TRANSFORMS_SUPPORTED - png_init_read_transformations(png_ptr); -#endif -#ifdef PNG_READ_INTERLACING_SUPPORTED - if (png_ptr->interlaced) - { - if (!(png_ptr->transformations & PNG_INTERLACE)) - png_ptr->num_rows = (png_ptr->height + png_pass_yinc[0] - 1 - - png_pass_ystart[0]) / png_pass_yinc[0]; - - else - png_ptr->num_rows = png_ptr->height; - - png_ptr->iwidth = (png_ptr->width + - png_pass_inc[png_ptr->pass] - 1 - - png_pass_start[png_ptr->pass]) / - png_pass_inc[png_ptr->pass]; - } - - else -#endif /* PNG_READ_INTERLACING_SUPPORTED */ - { - png_ptr->num_rows = png_ptr->height; - png_ptr->iwidth = png_ptr->width; - } - - max_pixel_depth = png_ptr->pixel_depth; - - /* WARNING: * png_read_transform_info (pngrtran.c) performs a simpliar set of - * calculations to calculate the final pixel depth, then - * png_do_read_transforms actually does the transforms. This means that the - * code which effectively calculates this value is actually repeated in three - * separate places. They must all match. Innocent changes to the order of - * transformations can and will break libpng in a way that causes memory - * overwrites. - * - * TODO: fix this. - */ -#ifdef PNG_READ_PACK_SUPPORTED - if ((png_ptr->transformations & PNG_PACK) && png_ptr->bit_depth < 8) - max_pixel_depth = 8; -#endif - -#ifdef PNG_READ_EXPAND_SUPPORTED - if (png_ptr->transformations & PNG_EXPAND) - { - if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) - { - if (png_ptr->num_trans) - max_pixel_depth = 32; - - else - max_pixel_depth = 24; - } - - else if (png_ptr->color_type == PNG_COLOR_TYPE_GRAY) - { - if (max_pixel_depth < 8) - max_pixel_depth = 8; - - if (png_ptr->num_trans) - max_pixel_depth *= 2; - } - - else if (png_ptr->color_type == PNG_COLOR_TYPE_RGB) - { - if (png_ptr->num_trans) - { - max_pixel_depth *= 4; - max_pixel_depth /= 3; - } - } - } -#endif - -#ifdef PNG_READ_EXPAND_16_SUPPORTED - if (png_ptr->transformations & PNG_EXPAND_16) - { -# ifdef PNG_READ_EXPAND_SUPPORTED - /* In fact it is an error if it isn't supported, but checking is - * the safe way. - */ - if (png_ptr->transformations & PNG_EXPAND) - { - if (png_ptr->bit_depth < 16) - max_pixel_depth *= 2; - } - else -# endif - png_ptr->transformations &= ~PNG_EXPAND_16; - } -#endif - -#ifdef PNG_READ_FILLER_SUPPORTED - if (png_ptr->transformations & (PNG_FILLER)) - { - if (png_ptr->color_type == PNG_COLOR_TYPE_GRAY) - { - if (max_pixel_depth <= 8) - max_pixel_depth = 16; - - else - max_pixel_depth = 32; - } - - else if (png_ptr->color_type == PNG_COLOR_TYPE_RGB || - png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) - { - if (max_pixel_depth <= 32) - max_pixel_depth = 32; - - else - max_pixel_depth = 64; - } - } -#endif - -#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED - if (png_ptr->transformations & PNG_GRAY_TO_RGB) - { - if ( -#ifdef PNG_READ_EXPAND_SUPPORTED - (png_ptr->num_trans && (png_ptr->transformations & PNG_EXPAND)) || -#endif -#ifdef PNG_READ_FILLER_SUPPORTED - (png_ptr->transformations & (PNG_FILLER)) || -#endif - png_ptr->color_type == PNG_COLOR_TYPE_GRAY_ALPHA) - { - if (max_pixel_depth <= 16) - max_pixel_depth = 32; - - else - max_pixel_depth = 64; - } - - else - { - if (max_pixel_depth <= 8) - { - if (png_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA) - max_pixel_depth = 32; - - else - max_pixel_depth = 24; - } - - else if (png_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA) - max_pixel_depth = 64; - - else - max_pixel_depth = 48; - } - } -#endif - -#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) && \ -defined(PNG_USER_TRANSFORM_PTR_SUPPORTED) - if (png_ptr->transformations & PNG_USER_TRANSFORM) - { - int user_pixel_depth = png_ptr->user_transform_depth * - png_ptr->user_transform_channels; - - if (user_pixel_depth > max_pixel_depth) - max_pixel_depth = user_pixel_depth; - } -#endif - - /* This value is stored in png_struct and double checked in the row read - * code. - */ - png_ptr->maximum_pixel_depth = (png_byte)max_pixel_depth; - png_ptr->transformed_pixel_depth = 0; /* calculated on demand */ - - /* Align the width on the next larger 8 pixels. Mainly used - * for interlacing - */ - row_bytes = ((png_ptr->width + 7) & ~((png_uint_32)7)); - /* Calculate the maximum bytes needed, adding a byte and a pixel - * for safety's sake - */ - row_bytes = PNG_ROWBYTES(max_pixel_depth, row_bytes) + - 1 + ((max_pixel_depth + 7) >> 3); - -#ifdef PNG_MAX_MALLOC_64K - if (row_bytes > (png_uint_32)65536L) - png_error(png_ptr, "This image requires a row greater than 64KB"); -#endif - - if (row_bytes + 48 > png_ptr->old_big_row_buf_size) - { - png_free(png_ptr, png_ptr->big_row_buf); - png_free(png_ptr, png_ptr->big_prev_row); - - if (png_ptr->interlaced) - png_ptr->big_row_buf = (png_bytep)png_calloc(png_ptr, - row_bytes + 48); - - else - png_ptr->big_row_buf = (png_bytep)png_malloc(png_ptr, row_bytes + 48); - - png_ptr->big_prev_row = (png_bytep)png_malloc(png_ptr, row_bytes + 48); - -#ifdef PNG_ALIGNED_MEMORY_SUPPORTED - /* Use 16-byte aligned memory for row_buf with at least 16 bytes - * of padding before and after row_buf; treat prev_row similarly. - * NOTE: the alignment is to the start of the pixels, one beyond the start - * of the buffer, because of the filter byte. Prior to libpng 1.5.6 this - * was incorrect; the filter byte was aligned, which had the exact - * opposite effect of that intended. - */ - { - png_bytep temp = png_ptr->big_row_buf + 32; - int extra = (int)((temp - (png_bytep)0) & 0x0f); - png_ptr->row_buf = temp - extra - 1/*filter byte*/; - - temp = png_ptr->big_prev_row + 32; - extra = (int)((temp - (png_bytep)0) & 0x0f); - png_ptr->prev_row = temp - extra - 1/*filter byte*/; - } - -#else - /* Use 31 bytes of padding before and 17 bytes after row_buf. */ - png_ptr->row_buf = png_ptr->big_row_buf + 31; - png_ptr->prev_row = png_ptr->big_prev_row + 31; -#endif - png_ptr->old_big_row_buf_size = row_bytes + 48; - } - -#ifdef PNG_MAX_MALLOC_64K - if (png_ptr->rowbytes > 65535) - png_error(png_ptr, "This image requires a row greater than 64KB"); - -#endif - if (png_ptr->rowbytes > (PNG_SIZE_MAX - 1)) - png_error(png_ptr, "Row has too many bytes to allocate in memory"); - - png_memset(png_ptr->prev_row, 0, png_ptr->rowbytes + 1); - - png_debug1(3, "width = %u,", png_ptr->width); - png_debug1(3, "height = %u,", png_ptr->height); - png_debug1(3, "iwidth = %u,", png_ptr->iwidth); - png_debug1(3, "num_rows = %u,", png_ptr->num_rows); - png_debug1(3, "rowbytes = %lu,", (unsigned long)png_ptr->rowbytes); - png_debug1(3, "irowbytes = %lu", - (unsigned long)PNG_ROWBYTES(png_ptr->pixel_depth, png_ptr->iwidth) + 1); - - png_ptr->flags |= PNG_FLAG_ROW_INIT; -} -#endif /* PNG_READ_SUPPORTED */ diff --git a/extern/libpng/include/pngset.c b/extern/libpng/include/pngset.c deleted file mode 100644 index e0118fa8c2..0000000000 --- a/extern/libpng/include/pngset.c +++ /dev/null @@ -1,1309 +0,0 @@ - -/* pngset.c - storage of image information into info struct - * - * Last changed in libpng 1.5.10 [(PENDING RELEASE)] - * Copyright (c) 1998-2012 Glenn Randers-Pehrson - * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) - * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) - * - * This code is released under the libpng license. - * For conditions of distribution and use, see the disclaimer - * and license in png.h - * - * The functions here are used during reads to store data from the file - * into the info struct, and during writes to store application data - * into the info struct for writing into the file. This abstracts the - * info struct and allows us to change the structure in the future. - */ - -#include "pngpriv.h" - -#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) - -#ifdef PNG_bKGD_SUPPORTED -void PNGAPI -png_set_bKGD(png_structp png_ptr, png_infop info_ptr, - png_const_color_16p background) -{ - png_debug1(1, "in %s storage function", "bKGD"); - - if (png_ptr == NULL || info_ptr == NULL) - return; - - png_memcpy(&(info_ptr->background), background, png_sizeof(png_color_16)); - info_ptr->valid |= PNG_INFO_bKGD; -} -#endif - -#ifdef PNG_cHRM_SUPPORTED -void PNGFAPI -png_set_cHRM_fixed(png_structp png_ptr, png_infop info_ptr, - png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x, - png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y, - png_fixed_point blue_x, png_fixed_point blue_y) -{ - png_debug1(1, "in %s storage function", "cHRM fixed"); - - if (png_ptr == NULL || info_ptr == NULL) - return; - -# ifdef PNG_CHECK_cHRM_SUPPORTED - if (png_check_cHRM_fixed(png_ptr, - white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y)) -# endif - { - info_ptr->x_white = white_x; - info_ptr->y_white = white_y; - info_ptr->x_red = red_x; - info_ptr->y_red = red_y; - info_ptr->x_green = green_x; - info_ptr->y_green = green_y; - info_ptr->x_blue = blue_x; - info_ptr->y_blue = blue_y; - info_ptr->valid |= PNG_INFO_cHRM; - } -} - -void PNGFAPI -png_set_cHRM_XYZ_fixed(png_structp png_ptr, png_infop info_ptr, - png_fixed_point int_red_X, png_fixed_point int_red_Y, - png_fixed_point int_red_Z, png_fixed_point int_green_X, - png_fixed_point int_green_Y, png_fixed_point int_green_Z, - png_fixed_point int_blue_X, png_fixed_point int_blue_Y, - png_fixed_point int_blue_Z) -{ - png_XYZ XYZ; - png_xy xy; - - png_debug1(1, "in %s storage function", "cHRM XYZ fixed"); - - if (png_ptr == NULL || info_ptr == NULL) - return; - - XYZ.redX = int_red_X; - XYZ.redY = int_red_Y; - XYZ.redZ = int_red_Z; - XYZ.greenX = int_green_X; - XYZ.greenY = int_green_Y; - XYZ.greenZ = int_green_Z; - XYZ.blueX = int_blue_X; - XYZ.blueY = int_blue_Y; - XYZ.blueZ = int_blue_Z; - - if (png_xy_from_XYZ(&xy, XYZ)) - png_error(png_ptr, "XYZ values out of representable range"); - - png_set_cHRM_fixed(png_ptr, info_ptr, xy.whitex, xy.whitey, xy.redx, xy.redy, - xy.greenx, xy.greeny, xy.bluex, xy.bluey); -} - -# ifdef PNG_FLOATING_POINT_SUPPORTED -void PNGAPI -png_set_cHRM(png_structp png_ptr, png_infop info_ptr, - double white_x, double white_y, double red_x, double red_y, - double green_x, double green_y, double blue_x, double blue_y) -{ - png_set_cHRM_fixed(png_ptr, info_ptr, - png_fixed(png_ptr, white_x, "cHRM White X"), - png_fixed(png_ptr, white_y, "cHRM White Y"), - png_fixed(png_ptr, red_x, "cHRM Red X"), - png_fixed(png_ptr, red_y, "cHRM Red Y"), - png_fixed(png_ptr, green_x, "cHRM Green X"), - png_fixed(png_ptr, green_y, "cHRM Green Y"), - png_fixed(png_ptr, blue_x, "cHRM Blue X"), - png_fixed(png_ptr, blue_y, "cHRM Blue Y")); -} - -void PNGAPI -png_set_cHRM_XYZ(png_structp png_ptr, png_infop info_ptr, double red_X, - double red_Y, double red_Z, double green_X, double green_Y, double green_Z, - double blue_X, double blue_Y, double blue_Z) -{ - png_set_cHRM_XYZ_fixed(png_ptr, info_ptr, - png_fixed(png_ptr, red_X, "cHRM Red X"), - png_fixed(png_ptr, red_Y, "cHRM Red Y"), - png_fixed(png_ptr, red_Z, "cHRM Red Z"), - png_fixed(png_ptr, green_X, "cHRM Red X"), - png_fixed(png_ptr, green_Y, "cHRM Red Y"), - png_fixed(png_ptr, green_Z, "cHRM Red Z"), - png_fixed(png_ptr, blue_X, "cHRM Red X"), - png_fixed(png_ptr, blue_Y, "cHRM Red Y"), - png_fixed(png_ptr, blue_Z, "cHRM Red Z")); -} -# endif /* PNG_FLOATING_POINT_SUPPORTED */ - -#endif /* PNG_cHRM_SUPPORTED */ - -#ifdef PNG_gAMA_SUPPORTED -void PNGFAPI -png_set_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, png_fixed_point - file_gamma) -{ - png_debug1(1, "in %s storage function", "gAMA"); - - if (png_ptr == NULL || info_ptr == NULL) - return; - - /* Changed in libpng-1.5.4 to limit the values to ensure overflow can't - * occur. Since the fixed point representation is assymetrical it is - * possible for 1/gamma to overflow the limit of 21474 and this means the - * gamma value must be at least 5/100000 and hence at most 20000.0. For - * safety the limits here are a little narrower. The values are 0.00016 to - * 6250.0, which are truly ridiculous gammma values (and will produce - * displays that are all black or all white.) - */ - if (file_gamma < 16 || file_gamma > 625000000) - png_warning(png_ptr, "Out of range gamma value ignored"); - - else - { - info_ptr->gamma = file_gamma; - info_ptr->valid |= PNG_INFO_gAMA; - } -} - -# ifdef PNG_FLOATING_POINT_SUPPORTED -void PNGAPI -png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma) -{ - png_set_gAMA_fixed(png_ptr, info_ptr, png_fixed(png_ptr, file_gamma, - "png_set_gAMA")); -} -# endif -#endif - -#ifdef PNG_hIST_SUPPORTED -void PNGAPI -png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_const_uint_16p hist) -{ - int i; - - png_debug1(1, "in %s storage function", "hIST"); - - if (png_ptr == NULL || info_ptr == NULL) - return; - - if (info_ptr->num_palette == 0 || info_ptr->num_palette - > PNG_MAX_PALETTE_LENGTH) - { - png_warning(png_ptr, - "Invalid palette size, hIST allocation skipped"); - - return; - } - - png_free_data(png_ptr, info_ptr, PNG_FREE_HIST, 0); - - /* Changed from info->num_palette to PNG_MAX_PALETTE_LENGTH in - * version 1.2.1 - */ - png_ptr->hist = (png_uint_16p)png_malloc_warn(png_ptr, - PNG_MAX_PALETTE_LENGTH * png_sizeof(png_uint_16)); - - if (png_ptr->hist == NULL) - { - png_warning(png_ptr, "Insufficient memory for hIST chunk data"); - return; - } - - for (i = 0; i < info_ptr->num_palette; i++) - png_ptr->hist[i] = hist[i]; - - info_ptr->hist = png_ptr->hist; - info_ptr->valid |= PNG_INFO_hIST; - info_ptr->free_me |= PNG_FREE_HIST; -} -#endif - -void PNGAPI -png_set_IHDR(png_structp png_ptr, png_infop info_ptr, - png_uint_32 width, png_uint_32 height, int bit_depth, - int color_type, int interlace_type, int compression_type, - int filter_type) -{ - png_debug1(1, "in %s storage function", "IHDR"); - - if (png_ptr == NULL || info_ptr == NULL) - return; - - info_ptr->width = width; - info_ptr->height = height; - info_ptr->bit_depth = (png_byte)bit_depth; - info_ptr->color_type = (png_byte)color_type; - info_ptr->compression_type = (png_byte)compression_type; - info_ptr->filter_type = (png_byte)filter_type; - info_ptr->interlace_type = (png_byte)interlace_type; - - png_check_IHDR (png_ptr, info_ptr->width, info_ptr->height, - info_ptr->bit_depth, info_ptr->color_type, info_ptr->interlace_type, - info_ptr->compression_type, info_ptr->filter_type); - - if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) - info_ptr->channels = 1; - - else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR) - info_ptr->channels = 3; - - else - info_ptr->channels = 1; - - if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA) - info_ptr->channels++; - - info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth); - - /* Check for potential overflow */ - if (width > - (PNG_UINT_32_MAX >> 3) /* 8-byte RRGGBBAA pixels */ - - 48 /* bigrowbuf hack */ - - 1 /* filter byte */ - - 7*8 /* rounding of width to multiple of 8 pixels */ - - 8) /* extra max_pixel_depth pad */ - info_ptr->rowbytes = 0; - else - info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, width); -} - -#ifdef PNG_oFFs_SUPPORTED -void PNGAPI -png_set_oFFs(png_structp png_ptr, png_infop info_ptr, - png_int_32 offset_x, png_int_32 offset_y, int unit_type) -{ - png_debug1(1, "in %s storage function", "oFFs"); - - if (png_ptr == NULL || info_ptr == NULL) - return; - - info_ptr->x_offset = offset_x; - info_ptr->y_offset = offset_y; - info_ptr->offset_unit_type = (png_byte)unit_type; - info_ptr->valid |= PNG_INFO_oFFs; -} -#endif - -#ifdef PNG_pCAL_SUPPORTED -void PNGAPI -png_set_pCAL(png_structp png_ptr, png_infop info_ptr, - png_const_charp purpose, png_int_32 X0, png_int_32 X1, int type, - int nparams, png_const_charp units, png_charpp params) -{ - png_size_t length; - int i; - - png_debug1(1, "in %s storage function", "pCAL"); - - if (png_ptr == NULL || info_ptr == NULL) - return; - - length = png_strlen(purpose) + 1; - png_debug1(3, "allocating purpose for info (%lu bytes)", - (unsigned long)length); - - /* TODO: validate format of calibration name and unit name */ - - /* Check that the type matches the specification. */ - if (type < 0 || type > 3) - png_error(png_ptr, "Invalid pCAL equation type"); - - /* Validate params[nparams] */ - for (i=0; ipcal_purpose = (png_charp)png_malloc_warn(png_ptr, length); - - if (info_ptr->pcal_purpose == NULL) - { - png_warning(png_ptr, "Insufficient memory for pCAL purpose"); - return; - } - - png_memcpy(info_ptr->pcal_purpose, purpose, length); - - png_debug(3, "storing X0, X1, type, and nparams in info"); - info_ptr->pcal_X0 = X0; - info_ptr->pcal_X1 = X1; - info_ptr->pcal_type = (png_byte)type; - info_ptr->pcal_nparams = (png_byte)nparams; - - length = png_strlen(units) + 1; - png_debug1(3, "allocating units for info (%lu bytes)", - (unsigned long)length); - - info_ptr->pcal_units = (png_charp)png_malloc_warn(png_ptr, length); - - if (info_ptr->pcal_units == NULL) - { - png_warning(png_ptr, "Insufficient memory for pCAL units"); - return; - } - - png_memcpy(info_ptr->pcal_units, units, length); - - info_ptr->pcal_params = (png_charpp)png_malloc_warn(png_ptr, - (png_size_t)((nparams + 1) * png_sizeof(png_charp))); - - if (info_ptr->pcal_params == NULL) - { - png_warning(png_ptr, "Insufficient memory for pCAL params"); - return; - } - - png_memset(info_ptr->pcal_params, 0, (nparams + 1) * png_sizeof(png_charp)); - - for (i = 0; i < nparams; i++) - { - length = png_strlen(params[i]) + 1; - png_debug2(3, "allocating parameter %d for info (%lu bytes)", i, - (unsigned long)length); - - info_ptr->pcal_params[i] = (png_charp)png_malloc_warn(png_ptr, length); - - if (info_ptr->pcal_params[i] == NULL) - { - png_warning(png_ptr, "Insufficient memory for pCAL parameter"); - return; - } - - png_memcpy(info_ptr->pcal_params[i], params[i], length); - } - - info_ptr->valid |= PNG_INFO_pCAL; - info_ptr->free_me |= PNG_FREE_PCAL; -} -#endif - -#ifdef PNG_sCAL_SUPPORTED -void PNGAPI -png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr, - int unit, png_const_charp swidth, png_const_charp sheight) -{ - png_size_t lengthw = 0, lengthh = 0; - - png_debug1(1, "in %s storage function", "sCAL"); - - if (png_ptr == NULL || info_ptr == NULL) - return; - - /* Double check the unit (should never get here with an invalid - * unit unless this is an API call.) - */ - if (unit != 1 && unit != 2) - png_error(png_ptr, "Invalid sCAL unit"); - - if (swidth == NULL || (lengthw = png_strlen(swidth)) == 0 || - swidth[0] == 45 /* '-' */ || !png_check_fp_string(swidth, lengthw)) - png_error(png_ptr, "Invalid sCAL width"); - - if (sheight == NULL || (lengthh = png_strlen(sheight)) == 0 || - sheight[0] == 45 /* '-' */ || !png_check_fp_string(sheight, lengthh)) - png_error(png_ptr, "Invalid sCAL height"); - - info_ptr->scal_unit = (png_byte)unit; - - ++lengthw; - - png_debug1(3, "allocating unit for info (%u bytes)", (unsigned int)lengthw); - - info_ptr->scal_s_width = (png_charp)png_malloc_warn(png_ptr, lengthw); - - if (info_ptr->scal_s_width == NULL) - { - png_warning(png_ptr, "Memory allocation failed while processing sCAL"); - return; - } - - png_memcpy(info_ptr->scal_s_width, swidth, lengthw); - - ++lengthh; - - png_debug1(3, "allocating unit for info (%u bytes)", (unsigned int)lengthh); - - info_ptr->scal_s_height = (png_charp)png_malloc_warn(png_ptr, lengthh); - - if (info_ptr->scal_s_height == NULL) - { - png_free (png_ptr, info_ptr->scal_s_width); - info_ptr->scal_s_width = NULL; - - png_warning(png_ptr, "Memory allocation failed while processing sCAL"); - return; - } - - png_memcpy(info_ptr->scal_s_height, sheight, lengthh); - - info_ptr->valid |= PNG_INFO_sCAL; - info_ptr->free_me |= PNG_FREE_SCAL; -} - -# ifdef PNG_FLOATING_POINT_SUPPORTED -void PNGAPI -png_set_sCAL(png_structp png_ptr, png_infop info_ptr, int unit, double width, - double height) -{ - png_debug1(1, "in %s storage function", "sCAL"); - - /* Check the arguments. */ - if (width <= 0) - png_warning(png_ptr, "Invalid sCAL width ignored"); - - else if (height <= 0) - png_warning(png_ptr, "Invalid sCAL height ignored"); - - else - { - /* Convert 'width' and 'height' to ASCII. */ - char swidth[PNG_sCAL_MAX_DIGITS+1]; - char sheight[PNG_sCAL_MAX_DIGITS+1]; - - png_ascii_from_fp(png_ptr, swidth, sizeof swidth, width, - PNG_sCAL_PRECISION); - png_ascii_from_fp(png_ptr, sheight, sizeof sheight, height, - PNG_sCAL_PRECISION); - - png_set_sCAL_s(png_ptr, info_ptr, unit, swidth, sheight); - } -} -# endif - -# ifdef PNG_FIXED_POINT_SUPPORTED -void PNGAPI -png_set_sCAL_fixed(png_structp png_ptr, png_infop info_ptr, int unit, - png_fixed_point width, png_fixed_point height) -{ - png_debug1(1, "in %s storage function", "sCAL"); - - /* Check the arguments. */ - if (width <= 0) - png_warning(png_ptr, "Invalid sCAL width ignored"); - - else if (height <= 0) - png_warning(png_ptr, "Invalid sCAL height ignored"); - - else - { - /* Convert 'width' and 'height' to ASCII. */ - char swidth[PNG_sCAL_MAX_DIGITS+1]; - char sheight[PNG_sCAL_MAX_DIGITS+1]; - - png_ascii_from_fixed(png_ptr, swidth, sizeof swidth, width); - png_ascii_from_fixed(png_ptr, sheight, sizeof sheight, height); - - png_set_sCAL_s(png_ptr, info_ptr, unit, swidth, sheight); - } -} -# endif -#endif - -#ifdef PNG_pHYs_SUPPORTED -void PNGAPI -png_set_pHYs(png_structp png_ptr, png_infop info_ptr, - png_uint_32 res_x, png_uint_32 res_y, int unit_type) -{ - png_debug1(1, "in %s storage function", "pHYs"); - - if (png_ptr == NULL || info_ptr == NULL) - return; - - info_ptr->x_pixels_per_unit = res_x; - info_ptr->y_pixels_per_unit = res_y; - info_ptr->phys_unit_type = (png_byte)unit_type; - info_ptr->valid |= PNG_INFO_pHYs; -} -#endif - -void PNGAPI -png_set_PLTE(png_structp png_ptr, png_infop info_ptr, - png_const_colorp palette, int num_palette) -{ - - png_debug1(1, "in %s storage function", "PLTE"); - - if (png_ptr == NULL || info_ptr == NULL) - return; - - if (num_palette < 0 || num_palette > PNG_MAX_PALETTE_LENGTH) - { - if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) - png_error(png_ptr, "Invalid palette length"); - - else - { - png_warning(png_ptr, "Invalid palette length"); - return; - } - } - - /* It may not actually be necessary to set png_ptr->palette here; - * we do it for backward compatibility with the way the png_handle_tRNS - * function used to do the allocation. - */ - png_free_data(png_ptr, info_ptr, PNG_FREE_PLTE, 0); - - /* Changed in libpng-1.2.1 to allocate PNG_MAX_PALETTE_LENGTH instead - * of num_palette entries, in case of an invalid PNG file that has - * too-large sample values. - */ - png_ptr->palette = (png_colorp)png_calloc(png_ptr, - PNG_MAX_PALETTE_LENGTH * png_sizeof(png_color)); - - png_memcpy(png_ptr->palette, palette, num_palette * png_sizeof(png_color)); - info_ptr->palette = png_ptr->palette; - info_ptr->num_palette = png_ptr->num_palette = (png_uint_16)num_palette; - - info_ptr->free_me |= PNG_FREE_PLTE; - - info_ptr->valid |= PNG_INFO_PLTE; -} - -#ifdef PNG_sBIT_SUPPORTED -void PNGAPI -png_set_sBIT(png_structp png_ptr, png_infop info_ptr, - png_const_color_8p sig_bit) -{ - png_debug1(1, "in %s storage function", "sBIT"); - - if (png_ptr == NULL || info_ptr == NULL) - return; - - png_memcpy(&(info_ptr->sig_bit), sig_bit, png_sizeof(png_color_8)); - info_ptr->valid |= PNG_INFO_sBIT; -} -#endif - -#ifdef PNG_sRGB_SUPPORTED -void PNGAPI -png_set_sRGB(png_structp png_ptr, png_infop info_ptr, int srgb_intent) -{ - png_debug1(1, "in %s storage function", "sRGB"); - - if (png_ptr == NULL || info_ptr == NULL) - return; - - info_ptr->srgb_intent = (png_byte)srgb_intent; - info_ptr->valid |= PNG_INFO_sRGB; -} - -void PNGAPI -png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr, - int srgb_intent) -{ - png_debug1(1, "in %s storage function", "sRGB_gAMA_and_cHRM"); - - if (png_ptr == NULL || info_ptr == NULL) - return; - - png_set_sRGB(png_ptr, info_ptr, srgb_intent); - -# ifdef PNG_gAMA_SUPPORTED - png_set_gAMA_fixed(png_ptr, info_ptr, PNG_GAMMA_sRGB_INVERSE); -# endif - -# ifdef PNG_cHRM_SUPPORTED - png_set_cHRM_fixed(png_ptr, info_ptr, - /* color x y */ - /* white */ 31270, 32900, - /* red */ 64000, 33000, - /* green */ 30000, 60000, - /* blue */ 15000, 6000 - ); -# endif /* cHRM */ -} -#endif /* sRGB */ - - -#ifdef PNG_iCCP_SUPPORTED -void PNGAPI -png_set_iCCP(png_structp png_ptr, png_infop info_ptr, - png_const_charp name, int compression_type, - png_const_bytep profile, png_uint_32 proflen) -{ - png_charp new_iccp_name; - png_bytep new_iccp_profile; - png_size_t length; - - png_debug1(1, "in %s storage function", "iCCP"); - - if (png_ptr == NULL || info_ptr == NULL || name == NULL || profile == NULL) - return; - - length = png_strlen(name)+1; - new_iccp_name = (png_charp)png_malloc_warn(png_ptr, length); - - if (new_iccp_name == NULL) - { - png_warning(png_ptr, "Insufficient memory to process iCCP chunk"); - return; - } - - png_memcpy(new_iccp_name, name, length); - new_iccp_profile = (png_bytep)png_malloc_warn(png_ptr, proflen); - - if (new_iccp_profile == NULL) - { - png_free (png_ptr, new_iccp_name); - png_warning(png_ptr, - "Insufficient memory to process iCCP profile"); - return; - } - - png_memcpy(new_iccp_profile, profile, (png_size_t)proflen); - - png_free_data(png_ptr, info_ptr, PNG_FREE_ICCP, 0); - - info_ptr->iccp_proflen = proflen; - info_ptr->iccp_name = new_iccp_name; - info_ptr->iccp_profile = new_iccp_profile; - /* Compression is always zero but is here so the API and info structure - * does not have to change if we introduce multiple compression types - */ - info_ptr->iccp_compression = (png_byte)compression_type; - info_ptr->free_me |= PNG_FREE_ICCP; - info_ptr->valid |= PNG_INFO_iCCP; -} -#endif - -#ifdef PNG_TEXT_SUPPORTED -void PNGAPI -png_set_text(png_structp png_ptr, png_infop info_ptr, png_const_textp text_ptr, - int num_text) -{ - int ret; - ret = png_set_text_2(png_ptr, info_ptr, text_ptr, num_text); - - if (ret) - png_error(png_ptr, "Insufficient memory to store text"); -} - -int /* PRIVATE */ -png_set_text_2(png_structp png_ptr, png_infop info_ptr, - png_const_textp text_ptr, int num_text) -{ - int i; - - png_debug1(1, "in %lx storage function", png_ptr == NULL ? "unexpected" : - (unsigned long)png_ptr->chunk_name); - - if (png_ptr == NULL || info_ptr == NULL || num_text == 0) - return(0); - - /* Make sure we have enough space in the "text" array in info_struct - * to hold all of the incoming text_ptr objects. - */ - if (info_ptr->num_text + num_text > info_ptr->max_text) - { - int old_max_text = info_ptr->max_text; - int old_num_text = info_ptr->num_text; - - if (info_ptr->text != NULL) - { - png_textp old_text; - - info_ptr->max_text = info_ptr->num_text + num_text + 8; - old_text = info_ptr->text; - - info_ptr->text = (png_textp)png_malloc_warn(png_ptr, - (png_size_t)(info_ptr->max_text * png_sizeof(png_text))); - - if (info_ptr->text == NULL) - { - /* Restore to previous condition */ - info_ptr->max_text = old_max_text; - info_ptr->text = old_text; - return(1); - } - - png_memcpy(info_ptr->text, old_text, (png_size_t)(old_max_text * - png_sizeof(png_text))); - png_free(png_ptr, old_text); - } - - else - { - info_ptr->max_text = num_text + 8; - info_ptr->num_text = 0; - info_ptr->text = (png_textp)png_malloc_warn(png_ptr, - (png_size_t)(info_ptr->max_text * png_sizeof(png_text))); - if (info_ptr->text == NULL) - { - /* Restore to previous condition */ - info_ptr->num_text = old_num_text; - info_ptr->max_text = old_max_text; - return(1); - } - info_ptr->free_me |= PNG_FREE_TEXT; - } - - png_debug1(3, "allocated %d entries for info_ptr->text", - info_ptr->max_text); - } - for (i = 0; i < num_text; i++) - { - png_size_t text_length, key_len; - png_size_t lang_len, lang_key_len; - png_textp textp = &(info_ptr->text[info_ptr->num_text]); - - if (text_ptr[i].key == NULL) - continue; - - if (text_ptr[i].compression < PNG_TEXT_COMPRESSION_NONE || - text_ptr[i].compression >= PNG_TEXT_COMPRESSION_LAST) - { - png_warning(png_ptr, "text compression mode is out of range"); - continue; - } - - key_len = png_strlen(text_ptr[i].key); - - if (text_ptr[i].compression <= 0) - { - lang_len = 0; - lang_key_len = 0; - } - - else -# ifdef PNG_iTXt_SUPPORTED - { - /* Set iTXt data */ - - if (text_ptr[i].lang != NULL) - lang_len = png_strlen(text_ptr[i].lang); - - else - lang_len = 0; - - if (text_ptr[i].lang_key != NULL) - lang_key_len = png_strlen(text_ptr[i].lang_key); - - else - lang_key_len = 0; - } -# else /* PNG_iTXt_SUPPORTED */ - { - png_warning(png_ptr, "iTXt chunk not supported"); - continue; - } -# endif - - if (text_ptr[i].text == NULL || text_ptr[i].text[0] == '\0') - { - text_length = 0; -# ifdef PNG_iTXt_SUPPORTED - if (text_ptr[i].compression > 0) - textp->compression = PNG_ITXT_COMPRESSION_NONE; - - else -# endif - textp->compression = PNG_TEXT_COMPRESSION_NONE; - } - - else - { - text_length = png_strlen(text_ptr[i].text); - textp->compression = text_ptr[i].compression; - } - - textp->key = (png_charp)png_malloc_warn(png_ptr, - (png_size_t) - (key_len + text_length + lang_len + lang_key_len + 4)); - - if (textp->key == NULL) - return(1); - - png_debug2(2, "Allocated %lu bytes at %p in png_set_text", - (unsigned long)(png_uint_32) - (key_len + lang_len + lang_key_len + text_length + 4), - textp->key); - - png_memcpy(textp->key, text_ptr[i].key,(png_size_t)(key_len)); - *(textp->key + key_len) = '\0'; - - if (text_ptr[i].compression > 0) - { - textp->lang = textp->key + key_len + 1; - png_memcpy(textp->lang, text_ptr[i].lang, lang_len); - *(textp->lang + lang_len) = '\0'; - textp->lang_key = textp->lang + lang_len + 1; - png_memcpy(textp->lang_key, text_ptr[i].lang_key, lang_key_len); - *(textp->lang_key + lang_key_len) = '\0'; - textp->text = textp->lang_key + lang_key_len + 1; - } - - else - { - textp->lang=NULL; - textp->lang_key=NULL; - textp->text = textp->key + key_len + 1; - } - - if (text_length) - png_memcpy(textp->text, text_ptr[i].text, - (png_size_t)(text_length)); - - *(textp->text + text_length) = '\0'; - -# ifdef PNG_iTXt_SUPPORTED - if (textp->compression > 0) - { - textp->text_length = 0; - textp->itxt_length = text_length; - } - - else -# endif - { - textp->text_length = text_length; - textp->itxt_length = 0; - } - - info_ptr->num_text++; - png_debug1(3, "transferred text chunk %d", info_ptr->num_text); - } - return(0); -} -#endif - -#ifdef PNG_tIME_SUPPORTED -void PNGAPI -png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_const_timep mod_time) -{ - png_debug1(1, "in %s storage function", "tIME"); - - if (png_ptr == NULL || info_ptr == NULL || - (png_ptr->mode & PNG_WROTE_tIME)) - return; - - if (mod_time->month == 0 || mod_time->month > 12 || - mod_time->day == 0 || mod_time->day > 31 || - mod_time->hour > 23 || mod_time->minute > 59 || - mod_time->second > 60) - { - png_warning(png_ptr, "Ignoring invalid time value"); - return; - } - - png_memcpy(&(info_ptr->mod_time), mod_time, png_sizeof(png_time)); - info_ptr->valid |= PNG_INFO_tIME; -} -#endif - -#ifdef PNG_tRNS_SUPPORTED -void PNGAPI -png_set_tRNS(png_structp png_ptr, png_infop info_ptr, - png_const_bytep trans_alpha, int num_trans, png_const_color_16p trans_color) -{ - png_debug1(1, "in %s storage function", "tRNS"); - - if (png_ptr == NULL || info_ptr == NULL) - return; - - if (trans_alpha != NULL) - { - /* It may not actually be necessary to set png_ptr->trans_alpha here; - * we do it for backward compatibility with the way the png_handle_tRNS - * function used to do the allocation. - */ - - png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0); - - /* Changed from num_trans to PNG_MAX_PALETTE_LENGTH in version 1.2.1 */ - png_ptr->trans_alpha = info_ptr->trans_alpha = - (png_bytep)png_malloc(png_ptr, (png_size_t)PNG_MAX_PALETTE_LENGTH); - - if (num_trans > 0 && num_trans <= PNG_MAX_PALETTE_LENGTH) - png_memcpy(info_ptr->trans_alpha, trans_alpha, (png_size_t)num_trans); - } - - if (trans_color != NULL) - { - int sample_max = (1 << info_ptr->bit_depth); - - if ((info_ptr->color_type == PNG_COLOR_TYPE_GRAY && - (int)trans_color->gray > sample_max) || - (info_ptr->color_type == PNG_COLOR_TYPE_RGB && - ((int)trans_color->red > sample_max || - (int)trans_color->green > sample_max || - (int)trans_color->blue > sample_max))) - png_warning(png_ptr, - "tRNS chunk has out-of-range samples for bit_depth"); - - png_memcpy(&(info_ptr->trans_color), trans_color, - png_sizeof(png_color_16)); - - if (num_trans == 0) - num_trans = 1; - } - - info_ptr->num_trans = (png_uint_16)num_trans; - - if (num_trans != 0) - { - info_ptr->valid |= PNG_INFO_tRNS; - info_ptr->free_me |= PNG_FREE_TRNS; - } -} -#endif - -#ifdef PNG_sPLT_SUPPORTED -void PNGAPI -png_set_sPLT(png_structp png_ptr, - png_infop info_ptr, png_const_sPLT_tp entries, int nentries) -/* - * entries - array of png_sPLT_t structures - * to be added to the list of palettes - * in the info structure. - * - * nentries - number of palette structures to be - * added. - */ -{ - png_sPLT_tp np; - int i; - - if (png_ptr == NULL || info_ptr == NULL) - return; - - np = (png_sPLT_tp)png_malloc_warn(png_ptr, - (info_ptr->splt_palettes_num + nentries) * - (png_size_t)png_sizeof(png_sPLT_t)); - - if (np == NULL) - { - png_warning(png_ptr, "No memory for sPLT palettes"); - return; - } - - png_memcpy(np, info_ptr->splt_palettes, - info_ptr->splt_palettes_num * png_sizeof(png_sPLT_t)); - - png_free(png_ptr, info_ptr->splt_palettes); - info_ptr->splt_palettes=NULL; - - for (i = 0; i < nentries; i++) - { - png_sPLT_tp to = np + info_ptr->splt_palettes_num + i; - png_const_sPLT_tp from = entries + i; - png_size_t length; - - length = png_strlen(from->name) + 1; - to->name = (png_charp)png_malloc_warn(png_ptr, length); - - if (to->name == NULL) - { - png_warning(png_ptr, - "Out of memory while processing sPLT chunk"); - continue; - } - - png_memcpy(to->name, from->name, length); - to->entries = (png_sPLT_entryp)png_malloc_warn(png_ptr, - from->nentries * png_sizeof(png_sPLT_entry)); - - if (to->entries == NULL) - { - png_warning(png_ptr, - "Out of memory while processing sPLT chunk"); - png_free(png_ptr, to->name); - to->name = NULL; - continue; - } - - png_memcpy(to->entries, from->entries, - from->nentries * png_sizeof(png_sPLT_entry)); - - to->nentries = from->nentries; - to->depth = from->depth; - } - - info_ptr->splt_palettes = np; - info_ptr->splt_palettes_num += nentries; - info_ptr->valid |= PNG_INFO_sPLT; - info_ptr->free_me |= PNG_FREE_SPLT; -} -#endif /* PNG_sPLT_SUPPORTED */ - -#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED -void PNGAPI -png_set_unknown_chunks(png_structp png_ptr, - png_infop info_ptr, png_const_unknown_chunkp unknowns, int num_unknowns) -{ - png_unknown_chunkp np; - int i; - - if (png_ptr == NULL || info_ptr == NULL || num_unknowns == 0) - return; - - np = (png_unknown_chunkp)png_malloc_warn(png_ptr, - (png_size_t)(info_ptr->unknown_chunks_num + num_unknowns) * - png_sizeof(png_unknown_chunk)); - - if (np == NULL) - { - png_warning(png_ptr, - "Out of memory while processing unknown chunk"); - return; - } - - png_memcpy(np, info_ptr->unknown_chunks, - (png_size_t)info_ptr->unknown_chunks_num * - png_sizeof(png_unknown_chunk)); - - png_free(png_ptr, info_ptr->unknown_chunks); - info_ptr->unknown_chunks = NULL; - - for (i = 0; i < num_unknowns; i++) - { - png_unknown_chunkp to = np + info_ptr->unknown_chunks_num + i; - png_const_unknown_chunkp from = unknowns + i; - - png_memcpy(to->name, from->name, png_sizeof(from->name)); - to->name[png_sizeof(to->name)-1] = '\0'; - to->size = from->size; - - /* Note our location in the read or write sequence */ - to->location = (png_byte)(png_ptr->mode & 0xff); - - if (from->size == 0) - to->data=NULL; - - else - { - to->data = (png_bytep)png_malloc_warn(png_ptr, - (png_size_t)from->size); - - if (to->data == NULL) - { - png_warning(png_ptr, - "Out of memory while processing unknown chunk"); - to->size = 0; - } - - else - png_memcpy(to->data, from->data, from->size); - } - } - - info_ptr->unknown_chunks = np; - info_ptr->unknown_chunks_num += num_unknowns; - info_ptr->free_me |= PNG_FREE_UNKN; -} - -void PNGAPI -png_set_unknown_chunk_location(png_structp png_ptr, png_infop info_ptr, - int chunk, int location) -{ - if (png_ptr != NULL && info_ptr != NULL && chunk >= 0 && chunk < - info_ptr->unknown_chunks_num) - info_ptr->unknown_chunks[chunk].location = (png_byte)location; -} -#endif - - -#ifdef PNG_MNG_FEATURES_SUPPORTED -png_uint_32 PNGAPI -png_permit_mng_features (png_structp png_ptr, png_uint_32 mng_features) -{ - png_debug(1, "in png_permit_mng_features"); - - if (png_ptr == NULL) - return (png_uint_32)0; - - png_ptr->mng_features_permitted = - (png_byte)(mng_features & PNG_ALL_MNG_FEATURES); - - return (png_uint_32)png_ptr->mng_features_permitted; -} -#endif - -#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED -void PNGAPI -png_set_keep_unknown_chunks(png_structp png_ptr, int keep, png_const_bytep - chunk_list, int num_chunks) -{ - png_bytep new_list, p; - int i, old_num_chunks; - if (png_ptr == NULL) - return; - - if (num_chunks == 0) - { - if (keep == PNG_HANDLE_CHUNK_ALWAYS || keep == PNG_HANDLE_CHUNK_IF_SAFE) - png_ptr->flags |= PNG_FLAG_KEEP_UNKNOWN_CHUNKS; - - else - png_ptr->flags &= ~PNG_FLAG_KEEP_UNKNOWN_CHUNKS; - - if (keep == PNG_HANDLE_CHUNK_ALWAYS) - png_ptr->flags |= PNG_FLAG_KEEP_UNSAFE_CHUNKS; - - else - png_ptr->flags &= ~PNG_FLAG_KEEP_UNSAFE_CHUNKS; - - return; - } - - if (chunk_list == NULL) - return; - - old_num_chunks = png_ptr->num_chunk_list; - new_list=(png_bytep)png_malloc(png_ptr, - (png_size_t)(5*(num_chunks + old_num_chunks))); - - if (png_ptr->chunk_list != NULL) - { - png_memcpy(new_list, png_ptr->chunk_list, - (png_size_t)(5*old_num_chunks)); - png_free(png_ptr, png_ptr->chunk_list); - png_ptr->chunk_list=NULL; - } - - png_memcpy(new_list + 5*old_num_chunks, chunk_list, - (png_size_t)(5*num_chunks)); - - for (p = new_list + 5*old_num_chunks + 4, i = 0; inum_chunk_list = old_num_chunks + num_chunks; - png_ptr->chunk_list = new_list; - png_ptr->free_me |= PNG_FREE_LIST; -} -#endif - -#ifdef PNG_READ_USER_CHUNKS_SUPPORTED -void PNGAPI -png_set_read_user_chunk_fn(png_structp png_ptr, png_voidp user_chunk_ptr, - png_user_chunk_ptr read_user_chunk_fn) -{ - png_debug(1, "in png_set_read_user_chunk_fn"); - - if (png_ptr == NULL) - return; - - png_ptr->read_user_chunk_fn = read_user_chunk_fn; - png_ptr->user_chunk_ptr = user_chunk_ptr; -} -#endif - -#ifdef PNG_INFO_IMAGE_SUPPORTED -void PNGAPI -png_set_rows(png_structp png_ptr, png_infop info_ptr, png_bytepp row_pointers) -{ - png_debug1(1, "in %s storage function", "rows"); - - if (png_ptr == NULL || info_ptr == NULL) - return; - - if (info_ptr->row_pointers && (info_ptr->row_pointers != row_pointers)) - png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0); - - info_ptr->row_pointers = row_pointers; - - if (row_pointers) - info_ptr->valid |= PNG_INFO_IDAT; -} -#endif - -void PNGAPI -png_set_compression_buffer_size(png_structp png_ptr, png_size_t size) -{ - if (png_ptr == NULL) - return; - - png_free(png_ptr, png_ptr->zbuf); - - if (size > ZLIB_IO_MAX) - { - png_warning(png_ptr, "Attempt to set buffer size beyond max ignored"); - png_ptr->zbuf_size = ZLIB_IO_MAX; - size = ZLIB_IO_MAX; /* must fit */ - } - - else - png_ptr->zbuf_size = (uInt)size; - - png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, size); - - /* The following ensures a relatively safe failure if this gets called while - * the buffer is actually in use. - */ - png_ptr->zstream.next_out = png_ptr->zbuf; - png_ptr->zstream.avail_out = 0; - png_ptr->zstream.avail_in = 0; -} - -void PNGAPI -png_set_invalid(png_structp png_ptr, png_infop info_ptr, int mask) -{ - if (png_ptr && info_ptr) - info_ptr->valid &= ~mask; -} - - - -#ifdef PNG_SET_USER_LIMITS_SUPPORTED -/* This function was added to libpng 1.2.6 */ -void PNGAPI -png_set_user_limits (png_structp png_ptr, png_uint_32 user_width_max, - png_uint_32 user_height_max) -{ - /* Images with dimensions larger than these limits will be - * rejected by png_set_IHDR(). To accept any PNG datastream - * regardless of dimensions, set both limits to 0x7ffffffL. - */ - if (png_ptr == NULL) - return; - - png_ptr->user_width_max = user_width_max; - png_ptr->user_height_max = user_height_max; -} - -/* This function was added to libpng 1.4.0 */ -void PNGAPI -png_set_chunk_cache_max (png_structp png_ptr, - png_uint_32 user_chunk_cache_max) -{ - if (png_ptr) - png_ptr->user_chunk_cache_max = user_chunk_cache_max; -} - -/* This function was added to libpng 1.4.1 */ -void PNGAPI -png_set_chunk_malloc_max (png_structp png_ptr, - png_alloc_size_t user_chunk_malloc_max) -{ - if (png_ptr) - png_ptr->user_chunk_malloc_max = user_chunk_malloc_max; -} -#endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */ - - -#ifdef PNG_BENIGN_ERRORS_SUPPORTED -void PNGAPI -png_set_benign_errors(png_structp png_ptr, int allowed) -{ - png_debug(1, "in png_set_benign_errors"); - - if (allowed) - png_ptr->flags |= PNG_FLAG_BENIGN_ERRORS_WARN; - - else - png_ptr->flags &= ~PNG_FLAG_BENIGN_ERRORS_WARN; -} -#endif /* PNG_BENIGN_ERRORS_SUPPORTED */ - -#ifdef PNG_READ_CHECK_FOR_INVALID_INDEX_SUPPORTED - /* Do not report invalid palette index; added at libng-1.5.10 */ -void PNGAPI -png_set_check_for_invalid_index(png_structp png_ptr, int allowed) -{ - png_debug(1, "in png_set_check_for_invalid_index"); - - if (allowed) - png_ptr->num_palette_max = 0; - - else - png_ptr->num_palette_max = -1; -} -#endif - -#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */ diff --git a/extern/libpng/include/pngvalid.c b/extern/libpng/include/pngvalid.c deleted file mode 100644 index 51def95ba0..0000000000 --- a/extern/libpng/include/pngvalid.c +++ /dev/null @@ -1,6658 +0,0 @@ - -/* pngvalid.c - validate libpng by constructing then reading png files. - * - * Last changed in libpng 1.5.1 [February 3, 2011] - * Copyright (c) 2011 Glenn Randers-Pehrson - * Written by John Cunningham Bowler - * - * This code is released under the libpng license. - * For conditions of distribution and use, see the disclaimer - * and license in png.h - * - * NOTES: - * This is a C program that is intended to be linked against libpng. It - * generates bitmaps internally, stores them as PNG files (using the - * sequential write code) then reads them back (using the sequential - * read code) and validates that the result has the correct data. - * - * The program can be modified and extended to test the correctness of - * transformations performed by libpng. - */ - -#include "png.h" -#if PNG_LIBPNG_VER < 10500 -/* This delibarately lacks the PNG_CONST. */ -typedef png_byte *png_const_bytep; - -/* This is copied from 1.5.1 png.h: */ -#define PNG_INTERLACE_ADAM7_PASSES 7 -#define PNG_PASS_START_ROW(pass) (((1U&~(pass))<<(3-((pass)>>1)))&7) -#define PNG_PASS_START_COL(pass) (((1U& (pass))<<(3-(((pass)+1)>>1)))&7) -#define PNG_PASS_ROW_SHIFT(pass) ((pass)>2?(8-(pass))>>1:3) -#define PNG_PASS_COL_SHIFT(pass) ((pass)>1?(7-(pass))>>1:3) -#define PNG_PASS_ROWS(height, pass) (((height)+(((1<>PNG_PASS_ROW_SHIFT(pass)) -#define PNG_PASS_COLS(width, pass) (((width)+(((1<>PNG_PASS_COL_SHIFT(pass)) -#define PNG_ROW_FROM_PASS_ROW(yIn, pass) \ - (((yIn)<>(((7-(off))-(pass))<<2)) & 0xFU) | \ - ((0x01145AF0U>>(((7-(off))-(pass))<<2)) & 0xF0U)) -#define PNG_ROW_IN_INTERLACE_PASS(y, pass) \ - ((PNG_PASS_MASK(pass,0) >> ((y)&7)) & 1) -#define PNG_COL_IN_INTERLACE_PASS(x, pass) \ - ((PNG_PASS_MASK(pass,1) >> ((x)&7)) & 1) - -/* These are needed too for the defualt build: */ -#define PNG_WRITE_16BIT_SUPPORTED -#define PNG_READ_16BIT_SUPPORTED -#endif - -#include "zlib.h" /* For crc32 */ - -#include /* For floating point constants */ -#include /* For malloc */ -#include /* For memcpy, memset */ -#include /* For floor */ - -/* Unused formal parameter errors are removed using the following macro which is - * expected to have no bad effects on performance. - */ -#ifndef UNUSED -# if defined(__GNUC__) || defined(_MSC_VER) -# define UNUSED(param) (void)param; -# else -# define UNUSED(param) -# endif -#endif - -/***************************** EXCEPTION HANDLING *****************************/ -#include "contrib/visupng/cexcept.h" -struct png_store; -define_exception_type(struct png_store*); - -/* The following are macros to reduce typing everywhere where the well known - * name 'the_exception_context' must be defined. - */ -#define anon_context(ps) struct exception_context *the_exception_context = \ - &(ps)->exception_context -#define context(ps,fault) anon_context(ps); png_store *fault - -/******************************* UTILITIES ************************************/ -/* Error handling is particularly problematic in production code - error - * handlers often themselves have bugs which lead to programs that detect - * minor errors crashing. The following functions deal with one very - * common class of errors in error handlers - attempting to format error or - * warning messages into buffers that are too small. - */ -static size_t safecat(char *buffer, size_t bufsize, size_t pos, - PNG_CONST char *cat) -{ - while (pos < bufsize && cat != NULL && *cat != 0) - buffer[pos++] = *cat++; - - if (pos >= bufsize) - pos = bufsize-1; - - buffer[pos] = 0; - return pos; -} - -static size_t safecatn(char *buffer, size_t bufsize, size_t pos, int n) -{ - char number[64]; - sprintf(number, "%d", n); - return safecat(buffer, bufsize, pos, number); -} - -static size_t safecatd(char *buffer, size_t bufsize, size_t pos, double d, - int precision) -{ - char number[64]; - sprintf(number, "%.*f", precision, d); - return safecat(buffer, bufsize, pos, number); -} - -static PNG_CONST char invalid[] = "invalid"; -static PNG_CONST char sep[] = ": "; - -/* NOTE: this is indexed by ln2(bit_depth)! */ -static PNG_CONST char *bit_depths[8] = -{ - "1", "2", "4", "8", "16", invalid, invalid, invalid -}; - -static PNG_CONST char *colour_types[8] = -{ - "greyscale", invalid, "truecolour", "indexed-colour", - "greyscale with alpha", invalid, "truecolour with alpha", invalid -}; - -/* To get log-bit-depth from bit depth, returns 0 to 7 (7 on error). */ -static unsigned int -log2depth(png_byte bit_depth) -{ - switch (bit_depth) - { - case 1: - return 0; - - case 2: - return 1; - - case 4: - return 2; - - case 8: - return 3; - - case 16: - return 4; - - default: - return 7; - } -} - -/* A numeric ID based on PNG file characteristics. The 'do_interlace' field - * simply records whether pngvalid did the interlace itself or whether it - * was done by libpng. Width and height must be less than 256. - */ -#define FILEID(col, depth, interlace, width, height, do_interlace) \ - ((png_uint_32)((col) + ((depth)<<3) + ((interlace)<<8) + \ - (((do_interlace)!=0)<<15) + ((width)<<16) + ((height)<<24))) - -#define COL_FROM_ID(id) ((png_byte)((id)& 0x7U)) -#define DEPTH_FROM_ID(id) ((png_byte)(((id) >> 3) & 0x1fU)) -#define INTERLACE_FROM_ID(id) ((int)(((id) >> 8) & 0x3)) -#define DO_INTERLACE_FROM_ID(id) ((int)(((id)>>15) & 1)) -#define WIDTH_FROM_ID(id) (((id)>>16) & 0xff) -#define HEIGHT_FROM_ID(id) (((id)>>24) & 0xff) - -/* Utility to construct a standard name for a standard image. */ -static size_t -standard_name(char *buffer, size_t bufsize, size_t pos, png_byte colour_type, - int log_bit_depth, int interlace_type, png_uint_32 w, png_uint_32 h, - int do_interlace) -{ - pos = safecat(buffer, bufsize, pos, colour_types[colour_type]); - pos = safecat(buffer, bufsize, pos, " "); - pos = safecat(buffer, bufsize, pos, bit_depths[log_bit_depth]); - pos = safecat(buffer, bufsize, pos, " bit "); - - if (interlace_type != PNG_INTERLACE_NONE) - pos = safecat(buffer, bufsize, pos, "interlaced"); - if (do_interlace) - pos = safecat(buffer, bufsize, pos, "(pngvalid)"); - else - pos = safecat(buffer, bufsize, pos, "(libpng)"); - if (w > 0 || h > 0) - { - pos = safecat(buffer, bufsize, pos, " "); - pos = safecatn(buffer, bufsize, pos, w); - pos = safecat(buffer, bufsize, pos, "x"); - pos = safecatn(buffer, bufsize, pos, h); - } - - return pos; -} - -static size_t -standard_name_from_id(char *buffer, size_t bufsize, size_t pos, png_uint_32 id) -{ - return standard_name(buffer, bufsize, pos, COL_FROM_ID(id), - log2depth(DEPTH_FROM_ID(id)), INTERLACE_FROM_ID(id), - WIDTH_FROM_ID(id), HEIGHT_FROM_ID(id), DO_INTERLACE_FROM_ID(id)); -} - -/* Convenience API and defines to list valid formats. Note that 16 bit read and - * write support is required to do 16 bit read tests (we must be able to make a - * 16 bit image to test!) - */ -#ifdef PNG_WRITE_16BIT_SUPPORTED -# define WRITE_BDHI 4 -# ifdef PNG_READ_16BIT_SUPPORTED -# define READ_BDHI 4 -# define DO_16BIT -# endif -#else -# define WRITE_BDHI 3 -#endif -#ifndef DO_16BIT -# define READ_BDHI 3 -#endif - -static int -next_format(png_bytep colour_type, png_bytep bit_depth) -{ - if (*bit_depth == 0) - { - *colour_type = 0, *bit_depth = 1; - return 1; - } - - *bit_depth = (png_byte)(*bit_depth << 1); - - /* Palette images are restricted to 8 bit depth */ - if (*bit_depth <= 8 -# ifdef DO_16BIT - || (*colour_type != 3 && *bit_depth <= 16) -# endif - ) - return 1; - - /* Move to the next color type, or return 0 at the end. */ - switch (*colour_type) - { - case 0: - *colour_type = 2; - *bit_depth = 8; - return 1; - - case 2: - *colour_type = 3; - *bit_depth = 1; - return 1; - - case 3: - *colour_type = 4; - *bit_depth = 8; - return 1; - - case 4: - *colour_type = 6; - *bit_depth = 8; - return 1; - - default: - return 0; - } -} - -static unsigned int -sample(png_const_bytep row, png_byte colour_type, png_byte bit_depth, - png_uint_32 x, unsigned int sample_index) -{ - png_uint_32 bit_index, result; - - /* Find a sample index for the desired sample: */ - x *= bit_depth; - bit_index = x; - - if ((colour_type & 1) == 0) /* !palette */ - { - if (colour_type & 2) - bit_index *= 3; - - if (colour_type & 4) - bit_index += x; /* Alpha channel */ - - if (colour_type & (2+4)) - bit_index += sample_index * bit_depth; /* Multiple channels: select one */ - } - - /* Return the sample from the row as an integer. */ - row += bit_index >> 3; - result = *row; - - if (bit_depth == 8) - return result; - - else if (bit_depth > 8) - return (result << 8) + *++row; - - /* Less than 8 bits per sample. */ - bit_index &= 7; - return (result >> (8-bit_index-bit_depth)) & ((1U<> 3] & ~destMask; - unsigned int sourceByte = fromBuffer[fromIndex >> 3]; - - /* Don't rely on << or >> supporting '0' here, just in case: */ - fromIndex &= 7; - if (fromIndex > 0) sourceByte <<= fromIndex; - if ((toIndex & 7) > 0) sourceByte >>= toIndex & 7; - - toBuffer[toIndex >> 3] = (png_byte)(destByte | (sourceByte & destMask)); - } - else /* One or more bytes */ - memmove(toBuffer+(toIndex>>3), fromBuffer+(fromIndex>>3), pixelSize>>3); -} - -/* Compare pixels - they are assumed to start at the first byte in the - * given buffers. - */ -static int -pixel_cmp(png_const_bytep pa, png_const_bytep pb, png_uint_32 bit_width) -{ - if (memcmp(pa, pb, bit_width>>3) == 0) - { - png_uint_32 p; - - if ((bit_width & 7) == 0) return 0; - - /* Ok, any differences? */ - p = pa[bit_width >> 3]; - p ^= pb[bit_width >> 3]; - - if (p == 0) return 0; - - /* There are, but they may not be significant, remove the bits - * after the end (the low order bits in PNG.) - */ - bit_width &= 7; - p >>= 8-bit_width; - - if (p == 0) return 0; - } - - return 1; /* Different */ -} - -/*************************** BASIC PNG FILE WRITING ***************************/ -/* A png_store takes data from the sequential writer or provides data - * to the sequential reader. It can also store the result of a PNG - * write for later retrieval. - */ -#define STORE_BUFFER_SIZE 500 /* arbitrary */ -typedef struct png_store_buffer -{ - struct png_store_buffer* prev; /* NOTE: stored in reverse order */ - png_byte buffer[STORE_BUFFER_SIZE]; -} png_store_buffer; - -#define FILE_NAME_SIZE 64 - -typedef struct png_store_file -{ - struct png_store_file* next; /* as many as you like... */ - char name[FILE_NAME_SIZE]; - png_uint_32 id; /* must be correct (see FILEID) */ - png_size_t datacount; /* In this (the last) buffer */ - png_store_buffer data; /* Last buffer in file */ -} png_store_file; - -/* The following is a pool of memory allocated by a single libpng read or write - * operation. - */ -typedef struct store_pool -{ - struct png_store *store; /* Back pointer */ - struct store_memory *list; /* List of allocated memory */ - png_byte mark[4]; /* Before and after data */ - - /* Statistics for this run. */ - png_alloc_size_t max; /* Maximum single allocation */ - png_alloc_size_t current; /* Current allocation */ - png_alloc_size_t limit; /* Highest current allocation */ - png_alloc_size_t total; /* Total allocation */ - - /* Overall statistics (retained across successive runs). */ - png_alloc_size_t max_max; - png_alloc_size_t max_limit; - png_alloc_size_t max_total; -} store_pool; - -typedef struct png_store -{ - /* For cexcept.h exception handling - simply store one of these; - * the context is a self pointer but it may point to a different - * png_store (in fact it never does in this program.) - */ - struct exception_context - exception_context; - - unsigned int verbose :1; - unsigned int treat_warnings_as_errors :1; - unsigned int expect_error :1; - unsigned int expect_warning :1; - unsigned int saw_warning :1; - unsigned int speed :1; - unsigned int progressive :1; /* use progressive read */ - unsigned int validated :1; /* used as a temporary flag */ - int nerrors; - int nwarnings; - char test[128]; /* Name of test */ - char error[256]; - - /* Read fields */ - png_structp pread; /* Used to read a saved file */ - png_infop piread; - png_store_file* current; /* Set when reading */ - png_store_buffer* next; /* Set when reading */ - png_size_t readpos; /* Position in *next */ - png_byte* image; /* Buffer for reading interlaced images */ - size_t cb_image; /* Size of this buffer */ - store_pool read_memory_pool; - - /* Write fields */ - png_store_file* saved; - png_structp pwrite; /* Used when writing a new file */ - png_infop piwrite; - png_size_t writepos; /* Position in .new */ - char wname[FILE_NAME_SIZE]; - png_store_buffer new; /* The end of the new PNG file being written. */ - store_pool write_memory_pool; -} png_store; - -/* Initialization and cleanup */ -static void -store_pool_mark(png_byte *mark) -{ - /* Generate a new mark. This uses a boring repeatable algorithm and it is - * implemented here so that it gives the same set of numbers on every - * architecture. It's a linear congruential generator (Knuth or Sedgewick - * "Algorithms") but it comes from the 'feedback taps' table in Horowitz and - * Hill, "The Art of Electronics". - */ - static png_uint_32 u0 = 0x12345678, u1 = 1; - - /* There are thirty three bits, the next bit in the sequence is bit-33 XOR - * bit-20. The top 1 bit is in u1, the bottom 32 are in u0. - */ - int i; - for (i=0; i<4; ++i) - { - /* First generate 8 new bits then shift them in at the end. */ - png_uint_32 u = ((u0 >> (20-8)) ^ ((u1 << 7) | (u0 >> (32-7)))) & 0xff; - u1 <<= 8; - u1 |= u0 >> 24; - u0 <<= 8; - u0 |= u; - *mark++ = (png_byte)u; - } -} - -/* Use this for random 32 bit values, this function makes sure the result is - * non-zero. - */ -static png_uint_32 -random_32(void) -{ - - for(;;) - { - png_byte mark[4]; - png_uint_32 result; - - store_pool_mark(mark); - result = png_get_uint_32(mark); - - if (result != 0) - return result; - } -} - -static void -store_pool_init(png_store *ps, store_pool *pool) -{ - memset(pool, 0, sizeof *pool); - - pool->store = ps; - pool->list = NULL; - pool->max = pool->current = pool->limit = pool->total = 0; - pool->max_max = pool->max_limit = pool->max_total = 0; - store_pool_mark(pool->mark); -} - -static void -store_init(png_store* ps) -{ - memset(ps, 0, sizeof *ps); - init_exception_context(&ps->exception_context); - store_pool_init(ps, &ps->read_memory_pool); - store_pool_init(ps, &ps->write_memory_pool); - ps->verbose = 0; - ps->treat_warnings_as_errors = 0; - ps->expect_error = 0; - ps->expect_warning = 0; - ps->saw_warning = 0; - ps->speed = 0; - ps->progressive = 0; - ps->validated = 0; - ps->nerrors = ps->nwarnings = 0; - ps->pread = NULL; - ps->piread = NULL; - ps->saved = ps->current = NULL; - ps->next = NULL; - ps->readpos = 0; - ps->image = NULL; - ps->cb_image = 0; - ps->pwrite = NULL; - ps->piwrite = NULL; - ps->writepos = 0; - ps->new.prev = NULL; -} - -/* This somewhat odd function is used when reading an image to ensure that the - * buffer is big enough - this is why a png_structp is available. - */ -static void -store_ensure_image(png_store *ps, png_structp pp, size_t cb) -{ - if (ps->cb_image < cb) - { - if (ps->image != NULL) - { - free(ps->image-1); - ps->cb_image = 0; - } - - /* The buffer is deliberately mis-aligned. */ - ps->image = malloc(cb+1); - if (ps->image == NULL) - png_error(pp, "OOM allocating image buffer"); - - ++(ps->image); - ps->cb_image = cb; - } - - /* And, for error checking, the whole buffer is set to '1' - this - * matches what happens with the 'size' test images on write and also - * matches the unused bits in the test rows. - */ - memset(ps->image, 0xff, cb); -} - -static void -store_freebuffer(png_store_buffer* psb) -{ - if (psb->prev) - { - store_freebuffer(psb->prev); - free(psb->prev); - psb->prev = NULL; - } -} - -static void -store_freenew(png_store *ps) -{ - store_freebuffer(&ps->new); - ps->writepos = 0; -} - -static void -store_storenew(png_store *ps) -{ - png_store_buffer *pb; - - if (ps->writepos != STORE_BUFFER_SIZE) - png_error(ps->pwrite, "invalid store call"); - - pb = malloc(sizeof *pb); - - if (pb == NULL) - png_error(ps->pwrite, "store new: OOM"); - - *pb = ps->new; - ps->new.prev = pb; - ps->writepos = 0; -} - -static void -store_freefile(png_store_file **ppf) -{ - if (*ppf != NULL) - { - store_freefile(&(*ppf)->next); - - store_freebuffer(&(*ppf)->data); - (*ppf)->datacount = 0; - free(*ppf); - *ppf = NULL; - } -} - -/* Main interface to file storeage, after writing a new PNG file (see the API - * below) call store_storefile to store the result with the given name and id. - */ -static void -store_storefile(png_store *ps, png_uint_32 id) -{ - png_store_file *pf = malloc(sizeof *pf); - if (pf == NULL) - png_error(ps->pwrite, "storefile: OOM"); - safecat(pf->name, sizeof pf->name, 0, ps->wname); - pf->id = id; - pf->data = ps->new; - pf->datacount = ps->writepos; - ps->new.prev = NULL; - ps->writepos = 0; - - /* And save it. */ - pf->next = ps->saved; - ps->saved = pf; -} - -/* Generate an error message (in the given buffer) */ -static size_t -store_message(png_store *ps, png_structp pp, char *buffer, size_t bufsize, - size_t pos, PNG_CONST char *msg) -{ - if (pp != NULL && pp == ps->pread) - { - /* Reading a file */ - pos = safecat(buffer, bufsize, pos, "read: "); - - if (ps->current != NULL) - { - pos = safecat(buffer, bufsize, pos, ps->current->name); - pos = safecat(buffer, bufsize, pos, sep); - } - } - - else if (pp != NULL && pp == ps->pwrite) - { - /* Writing a file */ - pos = safecat(buffer, bufsize, pos, "write: "); - pos = safecat(buffer, bufsize, pos, ps->wname); - pos = safecat(buffer, bufsize, pos, sep); - } - - else - { - /* Neither reading nor writing (or a memory error in struct delete) */ - pos = safecat(buffer, bufsize, pos, "pngvalid: "); - } - - if (ps->test[0] != 0) - { - pos = safecat(buffer, bufsize, pos, ps->test); - pos = safecat(buffer, bufsize, pos, sep); - } - pos = safecat(buffer, bufsize, pos, msg); - return pos; -} - -/* Log an error or warning - the relevant count is always incremented. */ -static void -store_log(png_store* ps, png_structp pp, png_const_charp message, int is_error) -{ - /* The warning is copied to the error buffer if there are no errors and it is - * the first warning. The error is copied to the error buffer if it is the - * first error (overwriting any prior warnings). - */ - if (is_error ? (ps->nerrors)++ == 0 : - (ps->nwarnings)++ == 0 && ps->nerrors == 0) - store_message(ps, pp, ps->error, sizeof ps->error, 0, message); - - if (ps->verbose) - { - char buffer[256]; - size_t pos; - - if (is_error) - pos = safecat(buffer, sizeof buffer, 0, "error: "); - else - pos = safecat(buffer, sizeof buffer, 0, "warning: "); - - store_message(ps, pp, buffer, sizeof buffer, pos, message); - fputs(buffer, stderr); - fputc('\n', stderr); - } -} - -/* Functions to use as PNG callbacks. */ -static void -store_error(png_structp pp, png_const_charp message) /* PNG_NORETURN */ -{ - png_store *ps = png_get_error_ptr(pp); - - if (!ps->expect_error) - store_log(ps, pp, message, 1 /* error */); - - /* And finally throw an exception. */ - { - struct exception_context *the_exception_context = &ps->exception_context; - Throw ps; - } -} - -static void -store_warning(png_structp pp, png_const_charp message) -{ - png_store *ps = png_get_error_ptr(pp); - - if (!ps->expect_warning) - store_log(ps, pp, message, 0 /* warning */); - else - ps->saw_warning = 1; -} - -static void -store_write(png_structp pp, png_bytep pb, png_size_t st) -{ - png_store *ps = png_get_io_ptr(pp); - - if (ps->pwrite != pp) - png_error(pp, "store state damaged"); - - while (st > 0) - { - size_t cb; - - if (ps->writepos >= STORE_BUFFER_SIZE) - store_storenew(ps); - - cb = st; - - if (cb > STORE_BUFFER_SIZE - ps->writepos) - cb = STORE_BUFFER_SIZE - ps->writepos; - - memcpy(ps->new.buffer + ps->writepos, pb, cb); - pb += cb; - st -= cb; - ps->writepos += cb; - } -} - -static void -store_flush(png_structp pp) -{ - UNUSED(pp) /*DOES NOTHING*/ -} - -static size_t -store_read_buffer_size(png_store *ps) -{ - /* Return the bytes available for read in the current buffer. */ - if (ps->next != &ps->current->data) - return STORE_BUFFER_SIZE; - - return ps->current->datacount; -} - -/* Return total bytes available for read. */ -static size_t -store_read_buffer_avail(png_store *ps) -{ - if (ps->current != NULL && ps->next != NULL) - { - png_store_buffer *next = &ps->current->data; - size_t cbAvail = ps->current->datacount; - - while (next != ps->next && next != NULL) - { - next = next->prev; - cbAvail += STORE_BUFFER_SIZE; - } - - if (next != ps->next) - png_error(ps->pread, "buffer read error"); - - if (cbAvail > ps->readpos) - return cbAvail - ps->readpos; - } - - return 0; -} - -static int -store_read_buffer_next(png_store *ps) -{ - png_store_buffer *pbOld = ps->next; - png_store_buffer *pbNew = &ps->current->data; - if (pbOld != pbNew) - { - while (pbNew != NULL && pbNew->prev != pbOld) - pbNew = pbNew->prev; - - if (pbNew != NULL) - { - ps->next = pbNew; - ps->readpos = 0; - return 1; - } - - png_error(ps->pread, "buffer lost"); - } - - return 0; /* EOF or error */ -} - -/* Need separate implementation and callback to allow use of the same code - * during progressive read, where the io_ptr is set internally by libpng. - */ -static void -store_read_imp(png_store *ps, png_bytep pb, png_size_t st) -{ - if (ps->current == NULL || ps->next == NULL) - png_error(ps->pread, "store state damaged"); - - while (st > 0) - { - size_t cbAvail = store_read_buffer_size(ps) - ps->readpos; - - if (cbAvail > 0) - { - if (cbAvail > st) cbAvail = st; - memcpy(pb, ps->next->buffer + ps->readpos, cbAvail); - st -= cbAvail; - pb += cbAvail; - ps->readpos += cbAvail; - } - - else if (!store_read_buffer_next(ps)) - png_error(ps->pread, "read beyond end of file"); - } -} - -static void -store_read(png_structp pp, png_bytep pb, png_size_t st) -{ - png_store *ps = png_get_io_ptr(pp); - - if (ps == NULL || ps->pread != pp) - png_error(pp, "bad store read call"); - - store_read_imp(ps, pb, st); -} - -static void -store_progressive_read(png_store *ps, png_structp pp, png_infop pi) -{ - /* Notice that a call to store_read will cause this function to fail because - * readpos will be set. - */ - if (ps->pread != pp || ps->current == NULL || ps->next == NULL) - png_error(pp, "store state damaged (progressive)"); - - do - { - if (ps->readpos != 0) - png_error(pp, "store_read called during progressive read"); - - png_process_data(pp, pi, ps->next->buffer, store_read_buffer_size(ps)); - } - while (store_read_buffer_next(ps)); -} - -/***************************** MEMORY MANAGEMENT*** ***************************/ -/* A store_memory is simply the header for an allocated block of memory. The - * pointer returned to libpng is just after the end of the header block, the - * allocated memory is followed by a second copy of the 'mark'. - */ -typedef struct store_memory -{ - store_pool *pool; /* Originating pool */ - struct store_memory *next; /* Singly linked list */ - png_alloc_size_t size; /* Size of memory allocated */ - png_byte mark[4]; /* ID marker */ -} store_memory; - -/* Handle a fatal error in memory allocation. This calls png_error if the - * libpng struct is non-NULL, else it outputs a message and returns. This means - * that a memory problem while libpng is running will abort (png_error) the - * handling of particular file while one in cleanup (after the destroy of the - * struct has returned) will simply keep going and free (or attempt to free) - * all the memory. - */ -static void -store_pool_error(png_store *ps, png_structp pp, PNG_CONST char *msg) -{ - if (pp != NULL) - png_error(pp, msg); - - /* Else we have to do it ourselves. png_error eventually calls store_log, - * above. store_log accepts a NULL png_structp - it just changes what gets - * output by store_message. - */ - store_log(ps, pp, msg, 1 /* error */); -} - -static void -store_memory_free(png_structp pp, store_pool *pool, store_memory *memory) -{ - /* Note that pp may be NULL (see store_pool_delete below), the caller has - * found 'memory' in pool->list *and* unlinked this entry, so this is a valid - * pointer (for sure), but the contents may have been trashed. - */ - if (memory->pool != pool) - store_pool_error(pool->store, pp, "memory corrupted (pool)"); - - else if (memcmp(memory->mark, pool->mark, sizeof memory->mark) != 0) - store_pool_error(pool->store, pp, "memory corrupted (start)"); - - /* It should be safe to read the size field now. */ - else - { - png_alloc_size_t cb = memory->size; - - if (cb > pool->max) - store_pool_error(pool->store, pp, "memory corrupted (size)"); - - else if (memcmp((png_bytep)(memory+1)+cb, pool->mark, sizeof pool->mark) - != 0) - store_pool_error(pool->store, pp, "memory corrupted (end)"); - - /* Finally give the library a chance to find problems too: */ - else - { - pool->current -= cb; - free(memory); - } - } -} - -static void -store_pool_delete(png_store *ps, store_pool *pool) -{ - if (pool->list != NULL) - { - fprintf(stderr, "%s: %s %s: memory lost (list follows):\n", ps->test, - pool == &ps->read_memory_pool ? "read" : "write", - pool == &ps->read_memory_pool ? (ps->current != NULL ? - ps->current->name : "unknown file") : ps->wname); - ++ps->nerrors; - - do - { - store_memory *next = pool->list; - pool->list = next->next; - next->next = NULL; - - fprintf(stderr, "\t%lu bytes @ %p\n", - (unsigned long)next->size, next+1); - /* The NULL means this will always return, even if the memory is - * corrupted. - */ - store_memory_free(NULL, pool, next); - } - while (pool->list != NULL); - } - - /* And reset the other fields too for the next time. */ - if (pool->max > pool->max_max) pool->max_max = pool->max; - pool->max = 0; - if (pool->current != 0) /* unexpected internal error */ - fprintf(stderr, "%s: %s %s: memory counter mismatch (internal error)\n", - ps->test, pool == &ps->read_memory_pool ? "read" : "write", - pool == &ps->read_memory_pool ? (ps->current != NULL ? - ps->current->name : "unknown file") : ps->wname); - pool->current = 0; - - if (pool->limit > pool->max_limit) - pool->max_limit = pool->limit; - - pool->limit = 0; - - if (pool->total > pool->max_total) - pool->max_total = pool->total; - - pool->total = 0; - - /* Get a new mark too. */ - store_pool_mark(pool->mark); -} - -/* The memory callbacks: */ -static png_voidp -store_malloc(png_structp pp, png_alloc_size_t cb) -{ - store_pool *pool = png_get_mem_ptr(pp); - store_memory *new = malloc(cb + (sizeof *new) + (sizeof pool->mark)); - - if (new != NULL) - { - if (cb > pool->max) - pool->max = cb; - - pool->current += cb; - - if (pool->current > pool->limit) - pool->limit = pool->current; - - pool->total += cb; - - new->size = cb; - memcpy(new->mark, pool->mark, sizeof new->mark); - memcpy((png_byte*)(new+1) + cb, pool->mark, sizeof pool->mark); - new->pool = pool; - new->next = pool->list; - pool->list = new; - ++new; - } - - else - store_pool_error(pool->store, pp, "out of memory"); - - return new; -} - -static void -store_free(png_structp pp, png_voidp memory) -{ - store_pool *pool = png_get_mem_ptr(pp); - store_memory *this = memory, **test; - - /* First check that this 'memory' really is valid memory - it must be in the - * pool list. If it is, use the shared memory_free function to free it. - */ - --this; - for (test = &pool->list; *test != this; test = &(*test)->next) - { - if (*test == NULL) - { - store_pool_error(pool->store, pp, "bad pointer to free"); - return; - } - } - - /* Unlink this entry, *test == this. */ - *test = this->next; - this->next = NULL; - store_memory_free(pp, pool, this); -} - -/* Setup functions. */ -/* Cleanup when aborting a write or after storing the new file. */ -static void -store_write_reset(png_store *ps) -{ - if (ps->pwrite != NULL) - { - anon_context(ps); - - Try - png_destroy_write_struct(&ps->pwrite, &ps->piwrite); - - Catch_anonymous - { - /* memory corruption: continue. */ - } - - ps->pwrite = NULL; - ps->piwrite = NULL; - } - - /* And make sure that all the memory has been freed - this will output - * spurious errors in the case of memory corruption above, but this is safe. - */ - store_pool_delete(ps, &ps->write_memory_pool); - - store_freenew(ps); -} - -/* The following is the main write function, it returns a png_struct and, - * optionally, a png_info suitable for writiing a new PNG file. Use - * store_storefile above to record this file after it has been written. The - * returned libpng structures as destroyed by store_write_reset above. - */ -static png_structp -set_store_for_write(png_store *ps, png_infopp ppi, - PNG_CONST char * volatile name) -{ - anon_context(ps); - - Try - { - if (ps->pwrite != NULL) - png_error(ps->pwrite, "write store already in use"); - - store_write_reset(ps); - safecat(ps->wname, sizeof ps->wname, 0, name); - - /* Don't do the slow memory checks if doing a speed test. */ - if (ps->speed) - ps->pwrite = png_create_write_struct(PNG_LIBPNG_VER_STRING, - ps, store_error, store_warning); - - else - ps->pwrite = png_create_write_struct_2(PNG_LIBPNG_VER_STRING, - ps, store_error, store_warning, &ps->write_memory_pool, - store_malloc, store_free); - - png_set_write_fn(ps->pwrite, ps, store_write, store_flush); - - if (ppi != NULL) - *ppi = ps->piwrite = png_create_info_struct(ps->pwrite); - } - - Catch_anonymous - return NULL; - - return ps->pwrite; -} - -/* Cleanup when finished reading (either due to error or in the success case). - */ -static void -store_read_reset(png_store *ps) -{ - if (ps->pread != NULL) - { - anon_context(ps); - - Try - png_destroy_read_struct(&ps->pread, &ps->piread, NULL); - - Catch_anonymous - { - /* error already output: continue */ - } - - ps->pread = NULL; - ps->piread = NULL; - } - - /* Always do this to be safe. */ - store_pool_delete(ps, &ps->read_memory_pool); - - ps->current = NULL; - ps->next = NULL; - ps->readpos = 0; - ps->validated = 0; -} - -static void -store_read_set(png_store *ps, png_uint_32 id) -{ - png_store_file *pf = ps->saved; - - while (pf != NULL) - { - if (pf->id == id) - { - ps->current = pf; - ps->next = NULL; - store_read_buffer_next(ps); - return; - } - - pf = pf->next; - } - - { - size_t pos; - char msg[FILE_NAME_SIZE+64]; - - pos = standard_name_from_id(msg, sizeof msg, 0, id); - pos = safecat(msg, sizeof msg, pos, ": file not found"); - png_error(ps->pread, msg); - } -} - -/* The main interface for reading a saved file - pass the id number of the file - * to retrieve. Ids must be unique or the earlier file will be hidden. The API - * returns a png_struct and, optionally, a png_info. Both of these will be - * destroyed by store_read_reset above. - */ -static png_structp -set_store_for_read(png_store *ps, png_infopp ppi, png_uint_32 id, - PNG_CONST char *name) -{ - /* Set the name for png_error */ - safecat(ps->test, sizeof ps->test, 0, name); - - if (ps->pread != NULL) - png_error(ps->pread, "read store already in use"); - - store_read_reset(ps); - - /* Both the create APIs can return NULL if used in their default mode - * (because there is no other way of handling an error because the jmp_buf - * by default is stored in png_struct and that has not been allocated!) - * However, given that store_error works correctly in these circumstances - * we don't ever expect NULL in this program. - */ - if (ps->speed) - ps->pread = png_create_read_struct(PNG_LIBPNG_VER_STRING, ps, - store_error, store_warning); - - else - ps->pread = png_create_read_struct_2(PNG_LIBPNG_VER_STRING, ps, - store_error, store_warning, &ps->read_memory_pool, store_malloc, - store_free); - - if (ps->pread == NULL) - { - struct exception_context *the_exception_context = &ps->exception_context; - - store_log(ps, NULL, "png_create_read_struct returned NULL (unexpected)", - 1 /*error*/); - - Throw ps; - } - - store_read_set(ps, id); - - if (ppi != NULL) - *ppi = ps->piread = png_create_info_struct(ps->pread); - - return ps->pread; -} - -/* The overall cleanup of a store simply calls the above then removes all the - * saved files. This does not delete the store itself. - */ -static void -store_delete(png_store *ps) -{ - store_write_reset(ps); - store_read_reset(ps); - store_freefile(&ps->saved); - - if (ps->image != NULL) - { - free(ps->image-1); - ps->image = NULL; - ps->cb_image = 0; - } -} - -/*********************** PNG FILE MODIFICATION ON READ ************************/ -/* Files may be modified on read. The following structure contains a complete - * png_store together with extra members to handle modification and a special - * read callback for libpng. To use this the 'modifications' field must be set - * to a list of png_modification structures that actually perform the - * modification, otherwise a png_modifier is functionally equivalent to a - * png_store. There is a special read function, set_modifier_for_read, which - * replaces set_store_for_read. - */ -typedef struct png_modifier -{ - png_store this; /* I am a png_store */ - struct png_modification *modifications; /* Changes to make */ - - enum modifier_state - { - modifier_start, /* Initial value */ - modifier_signature, /* Have a signature */ - modifier_IHDR /* Have an IHDR */ - } state; /* My state */ - - /* Information from IHDR: */ - png_byte bit_depth; /* From IHDR */ - png_byte colour_type; /* From IHDR */ - - /* While handling PLTE, IDAT and IEND these chunks may be pended to allow - * other chunks to be inserted. - */ - png_uint_32 pending_len; - png_uint_32 pending_chunk; - - /* Test values */ - double *gammas; - unsigned int ngammas; - - /* Lowest sbit to test (libpng fails for sbit < 8) */ - png_byte sbitlow; - - /* Error control - these are the limits on errors accepted by the gamma tests - * below. - */ - double maxout8; /* Maximum output value error */ - double maxabs8; /* Absolute sample error 0..1 */ - double maxpc8; /* Percentage sample error 0..100% */ - double maxout16; /* Maximum output value error */ - double maxabs16; /* Absolute sample error 0..1 */ - double maxpc16; /* Percentage sample error 0..100% */ - - /* Logged 8 and 16 bit errors ('output' values): */ - double error_gray_2; - double error_gray_4; - double error_gray_8; - double error_gray_16; - double error_color_8; - double error_color_16; - - /* Flags: */ - /* Whether or not to interlace. */ - int interlace_type :9; /* int, but must store '1' */ - - /* Run the standard tests? */ - unsigned int test_standard :1; - - /* Run the odd-sized image and interlace read/write tests? */ - unsigned int test_size :1; - - /* Run tests on reading with a combiniation of transforms, */ - unsigned int test_transform :1; - - /* When to use the use_input_precision option: */ - unsigned int use_input_precision :1; - unsigned int use_input_precision_sbit :1; - unsigned int use_input_precision_16to8 :1; - - /* Which gamma tests to run: */ - unsigned int test_gamma_threshold :1; - unsigned int test_gamma_transform :1; /* main tests */ - unsigned int test_gamma_sbit :1; - unsigned int test_gamma_strip16 :1; - - unsigned int log :1; /* Log max error */ - - /* Buffer information, the buffer size limits the size of the chunks that can - * be modified - they must fit (including header and CRC) into the buffer! - */ - size_t flush; /* Count of bytes to flush */ - size_t buffer_count; /* Bytes in buffer */ - size_t buffer_position; /* Position in buffer */ - png_byte buffer[1024]; -} png_modifier; - -static double abserr(png_modifier *pm, png_byte bit_depth) -{ - return bit_depth == 16 ? pm->maxabs16 : pm->maxabs8; -} - -static double pcerr(png_modifier *pm, png_byte bit_depth) -{ - return (bit_depth == 16 ? pm->maxpc16 : pm->maxpc8) * .01; -} - -static double outerr(png_modifier *pm, png_byte bit_depth) -{ - /* There is a serious error in the 2 and 4 bit grayscale transform because - * the gamma table value (8 bits) is simply shifted, not rounded, so the - * error in 4 bit greyscale gamma is up to the value below. This is a hack - * to allow pngvalid to succeed: - */ - if (bit_depth == 2) - return .73182-.5; - - if (bit_depth == 4) - return .90644-.5; - - if (bit_depth == 16) - return pm->maxout16; - - return pm->maxout8; -} - -/* This returns true if the test should be stopped now because it has already - * failed and it is running silently. - */ -static int fail(png_modifier *pm) -{ - return !pm->log && !pm->this.verbose && (pm->this.nerrors > 0 || - (pm->this.treat_warnings_as_errors && pm->this.nwarnings > 0)); -} - -static void -modifier_init(png_modifier *pm) -{ - memset(pm, 0, sizeof *pm); - store_init(&pm->this); - pm->modifications = NULL; - pm->state = modifier_start; - pm->sbitlow = 1U; - pm->maxout8 = pm->maxpc8 = pm->maxabs8 = 0; - pm->maxout16 = pm->maxpc16 = pm->maxabs16 = 0; - pm->error_gray_2 = pm->error_gray_4 = pm->error_gray_8 = 0; - pm->error_gray_16 = pm->error_color_8 = pm->error_color_16 = 0; - pm->interlace_type = PNG_INTERLACE_NONE; - pm->test_standard = 0; - pm->test_size = 0; - pm->test_transform = 0; - pm->use_input_precision = 0; - pm->use_input_precision_sbit = 0; - pm->use_input_precision_16to8 = 0; - pm->test_gamma_threshold = 0; - pm->test_gamma_transform = 0; - pm->test_gamma_sbit = 0; - pm->test_gamma_strip16 = 0; - pm->log = 0; - - /* Rely on the memset for all the other fields - there are no pointers */ -} - -/* One modification structure must be provided for each chunk to be modified (in - * fact more than one can be provided if multiple separate changes are desired - * for a single chunk.) Modifications include adding a new chunk when a - * suitable chunk does not exist. - * - * The caller of modify_fn will reset the CRC of the chunk and record 'modified' - * or 'added' as appropriate if the modify_fn returns 1 (true). If the - * modify_fn is NULL the chunk is simply removed. - */ -typedef struct png_modification -{ - struct png_modification *next; - png_uint_32 chunk; - - /* If the following is NULL all matching chunks will be removed: */ - int (*modify_fn)(struct png_modifier *pm, - struct png_modification *me, int add); - - /* If the following is set to PLTE, IDAT or IEND and the chunk has not been - * found and modified (and there is a modify_fn) the modify_fn will be called - * to add the chunk before the relevant chunk. - */ - png_uint_32 add; - unsigned int modified :1; /* Chunk was modified */ - unsigned int added :1; /* Chunk was added */ - unsigned int removed :1; /* Chunk was removed */ -} png_modification; - -static void modification_reset(png_modification *pmm) -{ - if (pmm != NULL) - { - pmm->modified = 0; - pmm->added = 0; - pmm->removed = 0; - modification_reset(pmm->next); - } -} - -static void -modification_init(png_modification *pmm) -{ - memset(pmm, 0, sizeof *pmm); - pmm->next = NULL; - pmm->chunk = 0; - pmm->modify_fn = NULL; - pmm->add = 0; - modification_reset(pmm); -} - -static void -modifier_reset(png_modifier *pm) -{ - store_read_reset(&pm->this); - pm->modifications = NULL; - pm->state = modifier_start; - pm->bit_depth = pm->colour_type = 0; - pm->pending_len = pm->pending_chunk = 0; - pm->flush = pm->buffer_count = pm->buffer_position = 0; -} - -/* Convenience macros. */ -#define CHUNK(a,b,c,d) (((a)<<24)+((b)<<16)+((c)<<8)+(d)) -#define CHUNK_IHDR CHUNK(73,72,68,82) -#define CHUNK_PLTE CHUNK(80,76,84,69) -#define CHUNK_IDAT CHUNK(73,68,65,84) -#define CHUNK_IEND CHUNK(73,69,78,68) -#define CHUNK_cHRM CHUNK(99,72,82,77) -#define CHUNK_gAMA CHUNK(103,65,77,65) -#define CHUNK_sBIT CHUNK(115,66,73,84) -#define CHUNK_sRGB CHUNK(115,82,71,66) - -/* The guts of modification are performed during a read. */ -static void -modifier_crc(png_bytep buffer) -{ - /* Recalculate the chunk CRC - a complete chunk must be in - * the buffer, at the start. - */ - uInt datalen = png_get_uint_32(buffer); - png_save_uint_32(buffer+datalen+8, crc32(0L, buffer+4, datalen+4)); -} - -static void -modifier_setbuffer(png_modifier *pm) -{ - modifier_crc(pm->buffer); - pm->buffer_count = png_get_uint_32(pm->buffer)+12; - pm->buffer_position = 0; -} - -/* Separate the callback into the actual implementation (which is passed the - * png_modifier explicitly) and the callback, which gets the modifier from the - * png_struct. - */ -static void -modifier_read_imp(png_modifier *pm, png_bytep pb, png_size_t st) -{ - while (st > 0) - { - size_t cb; - png_uint_32 len, chunk; - png_modification *mod; - - if (pm->buffer_position >= pm->buffer_count) switch (pm->state) - { - static png_byte sign[8] = { 137, 80, 78, 71, 13, 10, 26, 10 }; - case modifier_start: - store_read_imp(&pm->this, pm->buffer, 8); /* size of signature. */ - pm->buffer_count = 8; - pm->buffer_position = 0; - - if (memcmp(pm->buffer, sign, 8) != 0) - png_error(pm->this.pread, "invalid PNG file signature"); - pm->state = modifier_signature; - break; - - case modifier_signature: - store_read_imp(&pm->this, pm->buffer, 13+12); /* size of IHDR */ - pm->buffer_count = 13+12; - pm->buffer_position = 0; - - if (png_get_uint_32(pm->buffer) != 13 || - png_get_uint_32(pm->buffer+4) != CHUNK_IHDR) - png_error(pm->this.pread, "invalid IHDR"); - - /* Check the list of modifiers for modifications to the IHDR. */ - mod = pm->modifications; - while (mod != NULL) - { - if (mod->chunk == CHUNK_IHDR && mod->modify_fn && - (*mod->modify_fn)(pm, mod, 0)) - { - mod->modified = 1; - modifier_setbuffer(pm); - } - - /* Ignore removal or add if IHDR! */ - mod = mod->next; - } - - /* Cache information from the IHDR (the modified one.) */ - pm->bit_depth = pm->buffer[8+8]; - pm->colour_type = pm->buffer[8+8+1]; - - pm->state = modifier_IHDR; - pm->flush = 0; - break; - - case modifier_IHDR: - default: - /* Read a new chunk and process it until we see PLTE, IDAT or - * IEND. 'flush' indicates that there is still some data to - * output from the preceding chunk. - */ - if ((cb = pm->flush) > 0) - { - if (cb > st) cb = st; - pm->flush -= cb; - store_read_imp(&pm->this, pb, cb); - pb += cb; - st -= cb; - if (st <= 0) return; - } - - /* No more bytes to flush, read a header, or handle a pending - * chunk. - */ - if (pm->pending_chunk != 0) - { - png_save_uint_32(pm->buffer, pm->pending_len); - png_save_uint_32(pm->buffer+4, pm->pending_chunk); - pm->pending_len = 0; - pm->pending_chunk = 0; - } - else - store_read_imp(&pm->this, pm->buffer, 8); - - pm->buffer_count = 8; - pm->buffer_position = 0; - - /* Check for something to modify or a terminator chunk. */ - len = png_get_uint_32(pm->buffer); - chunk = png_get_uint_32(pm->buffer+4); - - /* Terminators first, they may have to be delayed for added - * chunks - */ - if (chunk == CHUNK_PLTE || chunk == CHUNK_IDAT || - chunk == CHUNK_IEND) - { - mod = pm->modifications; - - while (mod != NULL) - { - if ((mod->add == chunk || - (mod->add == CHUNK_PLTE && chunk == CHUNK_IDAT)) && - mod->modify_fn != NULL && !mod->modified && !mod->added) - { - /* Regardless of what the modify function does do not run - * this again. - */ - mod->added = 1; - - if ((*mod->modify_fn)(pm, mod, 1 /*add*/)) - { - /* Reset the CRC on a new chunk */ - if (pm->buffer_count > 0) - modifier_setbuffer(pm); - - else - { - pm->buffer_position = 0; - mod->removed = 1; - } - - /* The buffer has been filled with something (we assume) - * so output this. Pend the current chunk. - */ - pm->pending_len = len; - pm->pending_chunk = chunk; - break; /* out of while */ - } - } - - mod = mod->next; - } - - /* Don't do any further processing if the buffer was modified - - * otherwise the code will end up modifying a chunk that was - * just added. - */ - if (mod != NULL) - break; /* out of switch */ - } - - /* If we get to here then this chunk may need to be modified. To - * do this it must be less than 1024 bytes in total size, otherwise - * it just gets flushed. - */ - if (len+12 <= sizeof pm->buffer) - { - store_read_imp(&pm->this, pm->buffer+pm->buffer_count, - len+12-pm->buffer_count); - pm->buffer_count = len+12; - - /* Check for a modification, else leave it be. */ - mod = pm->modifications; - while (mod != NULL) - { - if (mod->chunk == chunk) - { - if (mod->modify_fn == NULL) - { - /* Remove this chunk */ - pm->buffer_count = pm->buffer_position = 0; - mod->removed = 1; - break; /* Terminate the while loop */ - } - - else if ((*mod->modify_fn)(pm, mod, 0)) - { - mod->modified = 1; - /* The chunk may have been removed: */ - if (pm->buffer_count == 0) - { - pm->buffer_position = 0; - break; - } - modifier_setbuffer(pm); - } - } - - mod = mod->next; - } - } - - else - pm->flush = len+12 - pm->buffer_count; /* data + crc */ - - /* Take the data from the buffer (if there is any). */ - break; - } - - /* Here to read from the modifier buffer (not directly from - * the store, as in the flush case above.) - */ - cb = pm->buffer_count - pm->buffer_position; - - if (cb > st) - cb = st; - - memcpy(pb, pm->buffer + pm->buffer_position, cb); - st -= cb; - pb += cb; - pm->buffer_position += cb; - } -} - -/* The callback: */ -static void -modifier_read(png_structp pp, png_bytep pb, png_size_t st) -{ - png_modifier *pm = png_get_io_ptr(pp); - - if (pm == NULL || pm->this.pread != pp) - png_error(pp, "bad modifier_read call"); - - modifier_read_imp(pm, pb, st); -} - -/* Like store_progressive_read but the data is getting changed as we go so we - * need a local buffer. - */ -static void -modifier_progressive_read(png_modifier *pm, png_structp pp, png_infop pi) -{ - if (pm->this.pread != pp || pm->this.current == NULL || - pm->this.next == NULL) - png_error(pp, "store state damaged (progressive)"); - - /* This is another Horowitz and Hill random noise generator. In this case - * the aim is to stress the progressive reader with truely horrible variable - * buffer sizes in the range 1..500, so a sequence of 9 bit random numbers - * is generated. We could probably just count from 1 to 32767 and get as - * good a result. - */ - for (;;) - { - static png_uint_32 noise = 1; - png_size_t cb, cbAvail; - png_byte buffer[512]; - - /* Generate 15 more bits of stuff: */ - noise = (noise << 9) | ((noise ^ (noise >> (9-5))) & 0x1ff); - cb = noise & 0x1ff; - - /* Check that this number of bytes are available (in the current buffer.) - * (This doesn't quite work - the modifier might delete a chunk; unlikely - * but possible, it doesn't happen at present because the modifier only - * adds chunks to standard images.) - */ - cbAvail = store_read_buffer_avail(&pm->this); - if (pm->buffer_count > pm->buffer_position) - cbAvail += pm->buffer_count - pm->buffer_position; - - if (cb > cbAvail) - { - /* Check for EOF: */ - if (cbAvail == 0) - break; - - cb = cbAvail; - } - - modifier_read_imp(pm, buffer, cb); - png_process_data(pp, pi, buffer, cb); - } - - /* Check the invariants at the end (if this fails it's a problem in this - * file!) - */ - if (pm->buffer_count > pm->buffer_position || - pm->this.next != &pm->this.current->data || - pm->this.readpos < pm->this.current->datacount) - png_error(pp, "progressive read implementation error"); -} - -/* Set up a modifier. */ -static png_structp -set_modifier_for_read(png_modifier *pm, png_infopp ppi, png_uint_32 id, - PNG_CONST char *name) -{ - /* Do this first so that the modifier fields are cleared even if an error - * happens allocating the png_struct. No allocation is done here so no - * cleanup is required. - */ - pm->state = modifier_start; - pm->bit_depth = 0; - pm->colour_type = 255; - - pm->pending_len = 0; - pm->pending_chunk = 0; - pm->flush = 0; - pm->buffer_count = 0; - pm->buffer_position = 0; - - return set_store_for_read(&pm->this, ppi, id, name); -} - -/***************************** STANDARD PNG FILES *****************************/ -/* Standard files - write and save standard files. */ -/* There are two basic forms of standard images. Those which attempt to have - * all the possible pixel values (not possible for 16bpp images, but a range of - * values are produced) and those which have a range of image sizes. The former - * are used for testing transforms, in particular gamma correction and bit - * reduction and increase. The latter are reserved for testing the behavior of - * libpng with respect to 'odd' image sizes - particularly small images where - * rows become 1 byte and interlace passes disappear. - * - * The first, most useful, set are the 'transform' images, the second set of - * small images are the 'size' images. - * - * The transform files are constructed with rows which fit into a 1024 byte row - * buffer. This makes allocation easier below. Further regardless of the file - * format every row has 128 pixels (giving 1024 bytes for 64bpp formats). - * - * Files are stored with no gAMA or sBIT chunks, with a PLTE only when needed - * and with an ID derived from the colour type, bit depth and interlace type - * as above (FILEID). The width (128) and height (variable) are not stored in - * the FILEID - instead the fields are set to 0, indicating a transform file. - * - * The size files ar constructed with rows a maximum of 128 bytes wide, allowing - * a maximum width of 16 pixels (for the 64bpp case.) They also have a maximum - * height of 16 rows. The width and height are stored in the FILEID and, being - * non-zero, indicate a size file. - */ - -/* The number of passes is related to the interlace type. There wass no libpng - * API to determine this prior to 1.5, so we need an inquiry function: - */ -static int -npasses_from_interlace_type(png_structp pp, int interlace_type) -{ - switch (interlace_type) - { - default: - png_error(pp, "invalid interlace type"); - - case PNG_INTERLACE_NONE: - return 1; - - case PNG_INTERLACE_ADAM7: - return PNG_INTERLACE_ADAM7_PASSES; - } -} - -static unsigned int -bit_size(png_structp pp, png_byte colour_type, png_byte bit_depth) -{ - switch (colour_type) - { - case 0: return bit_depth; - - case 2: return 3*bit_depth; - - case 3: return bit_depth; - - case 4: return 2*bit_depth; - - case 6: return 4*bit_depth; - - default: png_error(pp, "invalid color type"); - } -} - -#define TRANSFORM_WIDTH 128U -#define TRANSFORM_ROWMAX (TRANSFORM_WIDTH*8U) -#define SIZE_ROWMAX (16*8U) /* 16 pixels, max 8 bytes each - 128 bytes */ -#define STANDARD_ROWMAX TRANSFORM_ROWMAX /* The larger of the two */ - -/* So the maximum image sizes are as follows. A 'transform' image may require - * more than 65535 bytes. The size images are a maximum of 2046 bytes. - */ -#define TRANSFORM_IMAGEMAX (TRANSFORM_ROWMAX * (png_uint_32)2048) -#define SIZE_IMAGEMAX (SIZE_ROWMAX * 16U) - -static size_t -transform_rowsize(png_structp pp, png_byte colour_type, png_byte bit_depth) -{ - return (TRANSFORM_WIDTH * bit_size(pp, colour_type, bit_depth)) / 8; -} - -/* transform_width(pp, colour_type, bit_depth) current returns the same number - * every time, so just use a macro: - */ -#define transform_width(pp, colour_type, bit_depth) TRANSFORM_WIDTH - -static png_uint_32 -transform_height(png_structp pp, png_byte colour_type, png_byte bit_depth) -{ - switch (bit_size(pp, colour_type, bit_depth)) - { - case 1: - case 2: - case 4: - return 1; /* Total of 128 pixels */ - - case 8: - return 2; /* Total of 256 pixels/bytes */ - - case 16: - return 512; /* Total of 65536 pixels */ - - case 24: - case 32: - return 512; /* 65536 pixels */ - - case 48: - case 64: - return 2048;/* 4 x 65536 pixels. */ - - default: - return 0; /* Error, will be caught later */ - } -} - -/* The following can only be defined here, now we have the definitions - * of the transform image sizes. - */ -static png_uint_32 -standard_width(png_structp pp, png_uint_32 id) -{ - png_uint_32 width = WIDTH_FROM_ID(id); - UNUSED(pp) - - if (width == 0) - width = transform_width(pp, COL_FROM_ID(id), DEPTH_FROM_ID(id)); - - return width; -} - -static png_uint_32 -standard_height(png_structp pp, png_uint_32 id) -{ - png_uint_32 height = HEIGHT_FROM_ID(id); - - if (height == 0) - height = transform_height(pp, COL_FROM_ID(id), DEPTH_FROM_ID(id)); - - return height; -} - -static png_uint_32 -standard_rowsize(png_structp pp, png_uint_32 id) -{ - png_uint_32 width = standard_width(pp, id); - - /* This won't overflow: */ - width *= bit_size(pp, COL_FROM_ID(id), DEPTH_FROM_ID(id)); - return (width + 7) / 8; -} - -static void -transform_row(png_structp pp, png_byte buffer[TRANSFORM_ROWMAX], - png_byte colour_type, png_byte bit_depth, png_uint_32 y) -{ - png_uint_32 v = y << 7; - png_uint_32 i = 0; - - switch (bit_size(pp, colour_type, bit_depth)) - { - case 1: - while (i<128/8) buffer[i] = v & 0xff, v += 17, ++i; - return; - - case 2: - while (i<128/4) buffer[i] = v & 0xff, v += 33, ++i; - return; - - case 4: - while (i<128/2) buffer[i] = v & 0xff, v += 65, ++i; - return; - - case 8: - /* 256 bytes total, 128 bytes in each row set as follows: */ - while (i<128) buffer[i] = v & 0xff, ++v, ++i; - return; - - case 16: - /* Generate all 65536 pixel values in order, which includes the 8 bit - * GA case as well as the 16 bit G case. - */ - while (i<128) - buffer[2*i] = (v>>8) & 0xff, buffer[2*i+1] = v & 0xff, ++v, ++i; - - return; - - case 24: - /* 65535 pixels, but rotate the values. */ - while (i<128) - { - /* Three bytes per pixel, r, g, b, make b by r^g */ - buffer[3*i+0] = (v >> 8) & 0xff; - buffer[3*i+1] = v & 0xff; - buffer[3*i+2] = ((v >> 8) ^ v) & 0xff; - ++v; - ++i; - } - - return; - - case 32: - /* 65535 pixels, r, g, b, a; just replicate */ - while (i<128) - { - buffer[4*i+0] = (v >> 8) & 0xff; - buffer[4*i+1] = v & 0xff; - buffer[4*i+2] = (v >> 8) & 0xff; - buffer[4*i+3] = v & 0xff; - ++v; - ++i; - } - - return; - - case 48: - /* y is maximum 2047, giving 4x65536 pixels, make 'r' increase by 1 at - * each pixel, g increase by 257 (0x101) and 'b' by 0x1111: - */ - while (i<128) - { - png_uint_32 t = v++; - buffer[6*i+0] = (t >> 8) & 0xff; - buffer[6*i+1] = t & 0xff; - t *= 257; - buffer[6*i+2] = (t >> 8) & 0xff; - buffer[6*i+3] = t & 0xff; - t *= 17; - buffer[6*i+4] = (t >> 8) & 0xff; - buffer[6*i+5] = t & 0xff; - ++i; - } - - return; - - case 64: - /* As above in the 32 bit case. */ - while (i<128) - { - png_uint_32 t = v++; - buffer[8*i+0] = (t >> 8) & 0xff; - buffer[8*i+1] = t & 0xff; - buffer[8*i+4] = (t >> 8) & 0xff; - buffer[8*i+5] = t & 0xff; - t *= 257; - buffer[8*i+2] = (t >> 8) & 0xff; - buffer[8*i+3] = t & 0xff; - buffer[8*i+6] = (t >> 8) & 0xff; - buffer[8*i+7] = t & 0xff; - ++i; - } - return; - - default: - break; - } - - png_error(pp, "internal error"); -} - -/* This is just to do the right cast - could be changed to a function to check - * 'bd' but there isn't much point. - */ -#define DEPTH(bd) ((png_byte)(1U << (bd))) - -/* Make a standardized image given a an image colour type, bit depth and - * interlace type. The standard images have a very restricted range of - * rows and heights and are used for testing transforms rather than image - * layout details. See make_size_images below for a way to make images - * that test odd sizes along with the libpng interlace handling. - */ -static void -make_transform_image(png_store* PNG_CONST ps, png_byte PNG_CONST colour_type, - png_byte PNG_CONST bit_depth, int interlace_type, png_const_charp name) -{ - context(ps, fault); - - Try - { - png_infop pi; - png_structp pp = set_store_for_write(ps, &pi, name); - png_uint_32 h; - - /* In the event of a problem return control to the Catch statement below - * to do the clean up - it is not possible to 'return' directly from a Try - * block. - */ - if (pp == NULL) - Throw ps; - - h = transform_height(pp, colour_type, bit_depth); - - png_set_IHDR(pp, pi, transform_width(pp, colour_type, bit_depth), h, - bit_depth, colour_type, interlace_type, - PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE); - - if (colour_type == 3) /* palette */ - { - unsigned int i = 0; - png_color pal[256]; - - do - pal[i].red = pal[i].green = pal[i].blue = (png_byte)i; - while(++i < 256U); - - png_set_PLTE(pp, pi, pal, 256); - } - - png_write_info(pp, pi); - - if (png_get_rowbytes(pp, pi) != - transform_rowsize(pp, colour_type, bit_depth)) - png_error(pp, "row size incorrect"); - - else - { - /* Somewhat confusingly this must be called *after* png_write_info - * because if it is called before, the information in *pp has not been - * updated to reflect the interlaced image. - */ - int npasses = png_set_interlace_handling(pp); - int pass; - - if (npasses != npasses_from_interlace_type(pp, interlace_type)) - png_error(pp, "write: png_set_interlace_handling failed"); - - for (pass=0; passtest, sizeof ps->test, 0, "make standard images"); - - /* Arguments are colour_type, low bit depth, high bit depth - */ - make_standard(ps, 0, 0, WRITE_BDHI); - make_standard(ps, 2, 3, WRITE_BDHI); - make_standard(ps, 3, 0, 3 /*palette: max 8 bits*/); - make_standard(ps, 4, 3, WRITE_BDHI); - make_standard(ps, 6, 3, WRITE_BDHI); -} - -/* The following two routines use the PNG interlace support macros from - * png.h to interlace or deinterlace rows. - */ -static void -interlace_row(png_bytep buffer, png_const_bytep imageRow, - unsigned int pixel_size, png_uint_32 w, int pass) -{ - png_uint_32 xin, xout, xstep; - - /* Note that this can, trivially, be optimized to a memcpy on pass 7, the - * code is presented this way to make it easier to understand. In practice - * consult the code in the libpng source to see other ways of doing this. - */ - xin = PNG_PASS_START_COL(pass); - xstep = 1U<= 8) - *buffer++ = (png_byte)y++, bit_width -= 8; - - /* There may be up to 7 remaining bits, these go in the most significant - * bits of the byte. - */ - if (bit_width > 0) - { - png_uint_32 mask = (1U<<(8-bit_width))-1; - *buffer = (png_byte)((*buffer & mask) | (y & ~mask)); - } -} - -static void -make_size_image(png_store* PNG_CONST ps, png_byte PNG_CONST colour_type, - png_byte PNG_CONST bit_depth, int PNG_CONST interlace_type, - png_uint_32 PNG_CONST w, png_uint_32 PNG_CONST h, - int PNG_CONST do_interlace) -{ - context(ps, fault); - - Try - { - png_infop pi; - png_structp pp; - unsigned int pixel_size; - - /* Make a name and get an appropriate id for the store: */ - char name[FILE_NAME_SIZE]; - PNG_CONST png_uint_32 id = FILEID(colour_type, bit_depth, interlace_type, - w, h, do_interlace); - - standard_name_from_id(name, sizeof name, 0, id); - pp = set_store_for_write(ps, &pi, name); - - /* In the event of a problem return control to the Catch statement below - * to do the clean up - it is not possible to 'return' directly from a Try - * block. - */ - if (pp == NULL) - Throw ps; - - png_set_IHDR(pp, pi, w, h, bit_depth, colour_type, interlace_type, - PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE); - - /* Same palette as make_transform_image - I don' think there is any - * benefit from using a different one (JB 20101211) - */ - if (colour_type == 3) /* palette */ - { - unsigned int i = 0; - png_color pal[256]; - - do - pal[i].red = pal[i].green = pal[i].blue = (png_byte)i; - while(++i < 256U); - - png_set_PLTE(pp, pi, pal, 256); - } - - png_write_info(pp, pi); - - /* Calculate the bit size, divide by 8 to get the byte size - this won't - * overflow because we know the w values are all small enough even for - * a system where 'unsigned int' is only 16 bits. - */ - pixel_size = bit_size(pp, colour_type, bit_depth); - if (png_get_rowbytes(pp, pi) != ((w * pixel_size) + 7) / 8) - png_error(pp, "row size incorrect"); - - else - { - int npasses = npasses_from_interlace_type(pp, interlace_type); - png_uint_32 y; - int pass; - png_byte image[16][SIZE_ROWMAX]; - - /* To help consistent error detection make the parts of this buffer - * that aren't set below all '1': - */ - memset(image, 0xff, sizeof image); - - if (!do_interlace && npasses != png_set_interlace_handling(pp)) - png_error(pp, "write: png_set_interlace_handling failed"); - - /* Prepare the whole image first to avoid making it 7 times: */ - for (y=0; y 0) - { - /* Set to all 1's for error detection (libpng tends to - * set unset things to 0). - */ - memset(tempRow, 0xff, sizeof tempRow); - interlace_row(tempRow, row, pixel_size, w, pass); - row = tempRow; - } - else - continue; - } - - /* Only get to here if the row has some pixels in it. */ - png_write_row(pp, row); - } - } - } - - png_write_end(pp, pi); - - /* And store this under the appropriate id, then clean up. */ - store_storefile(ps, id); - - store_write_reset(ps); - } - - Catch(fault) - { - /* Use the png_store returned by the exception. This may help the compiler - * because 'ps' is not used in this branch of the setjmp. Note that fault - * and ps will always be the same value. - */ - store_write_reset(fault); - } -} - -static void -make_size(png_store* PNG_CONST ps, png_byte PNG_CONST colour_type, int bdlo, - int PNG_CONST bdhi) -{ - for (; bdlo <= bdhi; ++bdlo) - { - png_uint_32 width; - - for (width = 1; width <= 16; ++width) - { - png_uint_32 height; - - for (height = 1; height <= 16; ++height) - { - /* The four combinations of DIY interlace and interlace or not - - * no interlace + DIY should be identical to no interlace with - * libpng doing it. - */ - make_size_image(ps, colour_type, DEPTH(bdlo), PNG_INTERLACE_NONE, - width, height, 0); - make_size_image(ps, colour_type, DEPTH(bdlo), PNG_INTERLACE_NONE, - width, height, 1); - make_size_image(ps, colour_type, DEPTH(bdlo), PNG_INTERLACE_ADAM7, - width, height, 0); - make_size_image(ps, colour_type, DEPTH(bdlo), PNG_INTERLACE_ADAM7, - width, height, 1); - } - } - } -} - -static void -make_size_images(png_store *ps) -{ - /* This is in case of errors. */ - safecat(ps->test, sizeof ps->test, 0, "make size images"); - - /* Arguments are colour_type, low bit depth, high bit depth - */ - make_size(ps, 0, 0, WRITE_BDHI); - make_size(ps, 2, 3, WRITE_BDHI); - make_size(ps, 3, 0, 3 /*palette: max 8 bits*/); - make_size(ps, 4, 3, WRITE_BDHI); - make_size(ps, 6, 3, WRITE_BDHI); -} - -/* Return a row based on image id and 'y' for checking: */ -static void -standard_row(png_structp pp, png_byte std[STANDARD_ROWMAX], png_uint_32 id, - png_uint_32 y) -{ - if (WIDTH_FROM_ID(id) == 0) - transform_row(pp, std, COL_FROM_ID(id), DEPTH_FROM_ID(id), y); - else - size_row(std, WIDTH_FROM_ID(id) * bit_size(pp, COL_FROM_ID(id), - DEPTH_FROM_ID(id)), y); -} - -/* Tests - individual test cases */ -/* Like 'make_standard' but errors are deliberately introduced into the calls - * to ensure that they get detected - it should not be possible to write an - * invalid image with libpng! - */ -static void -sBIT0_error_fn(png_structp pp, png_infop pi) -{ - /* 0 is invalid... */ - png_color_8 bad; - bad.red = bad.green = bad.blue = bad.gray = bad.alpha = 0; - png_set_sBIT(pp, pi, &bad); -} - -static void -sBIT_error_fn(png_structp pp, png_infop pi) -{ - png_byte bit_depth; - png_color_8 bad; - - if (png_get_color_type(pp, pi) == PNG_COLOR_TYPE_PALETTE) - bit_depth = 8; - - else - bit_depth = png_get_bit_depth(pp, pi); - - /* Now we know the bit depth we can easily generate an invalid sBIT entry */ - bad.red = bad.green = bad.blue = bad.gray = bad.alpha = - (png_byte)(bit_depth+1); - png_set_sBIT(pp, pi, &bad); -} - -static PNG_CONST struct -{ - void (*fn)(png_structp, png_infop); - PNG_CONST char *msg; - unsigned int warning :1; /* the error is a warning... */ -} error_test[] = - { - { sBIT0_error_fn, "sBIT(0): failed to detect error", 1 }, - { sBIT_error_fn, "sBIT(too big): failed to detect error", 1 }, - }; - -static void -make_error(png_store* volatile ps, png_byte PNG_CONST colour_type, - png_byte bit_depth, int interlace_type, int test, png_const_charp name) -{ - context(ps, fault); - - Try - { - png_structp pp; - png_infop pi; - - pp = set_store_for_write(ps, &pi, name); - - if (pp == NULL) - Throw ps; - - png_set_IHDR(pp, pi, transform_width(pp, colour_type, bit_depth), - transform_height(pp, colour_type, bit_depth), bit_depth, colour_type, - interlace_type, PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE); - - if (colour_type == 3) /* palette */ - { - unsigned int i = 0; - png_color pal[256]; - - do - pal[i].red = pal[i].green = pal[i].blue = (png_byte)i; - while(++i < 256U); - - png_set_PLTE(pp, pi, pal, 256); - } - - /* Time for a few errors, these are in various optional chunks, the - * standard tests test the standard chunks pretty well. - */ -# define exception__prev exception_prev_1 -# define exception__env exception_env_1 - Try - { - /* Expect this to throw: */ - ps->expect_error = !error_test[test].warning; - ps->expect_warning = error_test[test].warning; - ps->saw_warning = 0; - error_test[test].fn(pp, pi); - - /* Normally the error is only detected here: */ - png_write_info(pp, pi); - - /* And handle the case where it was only a warning: */ - if (ps->expect_warning && ps->saw_warning) - Throw ps; - - /* If we get here there is a problem, we have success - no error or - * no warning - when we shouldn't have success. Log an error. - */ - store_log(ps, pp, error_test[test].msg, 1 /*error*/); - } - - Catch (fault) - ps = fault; /* expected exit, make sure ps is not clobbered */ -#undef exception__prev -#undef exception__env - - /* And clear these flags */ - ps->expect_error = 0; - ps->expect_warning = 0; - - /* Now write the whole image, just to make sure that the detected, or - * undetected, errro has not created problems inside libpng. - */ - if (png_get_rowbytes(pp, pi) != - transform_rowsize(pp, colour_type, bit_depth)) - png_error(pp, "row size incorrect"); - - else - { - png_uint_32 h = transform_height(pp, colour_type, bit_depth); - int npasses = png_set_interlace_handling(pp); - int pass; - - if (npasses != npasses_from_interlace_type(pp, interlace_type)) - png_error(pp, "write: png_set_interlace_handling failed"); - - for (pass=0; passthis, colour_type, DEPTH(bdlo), interlace_type, - test, name); - - if (fail(pm)) - return 0; - } - } - } - - return 1; /* keep going */ -} - -static void -perform_error_test(png_modifier *pm) -{ - /* Need to do this here because we just write in this test. */ - safecat(pm->this.test, sizeof pm->this.test, 0, "error test"); - - if (!make_errors(pm, 0, 0, WRITE_BDHI)) - return; - - if (!make_errors(pm, 2, 3, WRITE_BDHI)) - return; - - if (!make_errors(pm, 3, 0, 3)) - return; - - if (!make_errors(pm, 4, 3, WRITE_BDHI)) - return; - - if (!make_errors(pm, 6, 3, WRITE_BDHI)) - return; -} - -/* Because we want to use the same code in both the progressive reader and the - * sequential reader it is necessary to deal with the fact that the progressive - * reader callbacks only have one parameter (png_get_progressive_ptr()), so this - * must contain all the test parameters and all the local variables directly - * accessible to the sequential reader implementation. - * - * The technique adopted is to reinvent part of what Dijkstra termed a - * 'display'; an array of pointers to the stack frames of enclosing functions so - * that a nested function definition can access the local (C auto) variables of - * the functions that contain its definition. In fact C provides the first - * pointer (the local variables - the stack frame pointer) and the last (the - * global variables - the BCPL global vector typically implemented as global - * addresses), this code requires one more pointer to make the display - the - * local variables (and function call parameters) of the function that actually - * invokes either the progressive or sequential reader. - * - * Perhaps confusingly this technique is confounded with classes - the - * 'standard_display' defined here is sub-classed as the 'gamma_display' below. - * A gamma_display is a standard_display, taking advantage of the ANSI-C - * requirement that the pointer to the first member of a structure must be the - * same as the pointer to the structure. This allows us to reuse standard_ - * functions in the gamma test code; something that could not be done with - * nested funtions! - */ -typedef struct standard_palette_entry /* pngvalid format palette! */ -{ - png_byte red; - png_byte green; - png_byte blue; - png_byte alpha; -} standard_palette[256]; - -typedef struct standard_display -{ - png_store* ps; /* Test parameters (passed to the function) */ - png_byte colour_type; - png_byte bit_depth; - png_byte red_sBIT; /* Input data sBIT values. */ - png_byte green_sBIT; - png_byte blue_sBIT; - png_byte alpha_sBIT; - int interlace_type; - png_uint_32 id; /* Calculated file ID */ - png_uint_32 w; /* Width of image */ - png_uint_32 h; /* Height of image */ - int npasses; /* Number of interlaced passes */ - png_uint_32 pixel_size; /* Width of one pixel in bits */ - png_uint_32 bit_width; /* Width of output row in bits */ - size_t cbRow; /* Bytes in a row of the output image */ - int do_interlace; /* Do interlacing internally */ - int is_transparent; /* Transparecy information was present. */ - struct - { - png_uint_16 red; - png_uint_16 green; - png_uint_16 blue; - } transparent; /* The transparent color, if set. */ - standard_palette - palette; -} standard_display; - -static void -standard_display_init(standard_display *dp, png_store* ps, png_uint_32 id, - int do_interlace) -{ - dp->ps = ps; - dp->colour_type = COL_FROM_ID(id); - dp->bit_depth = DEPTH_FROM_ID(id); - dp->alpha_sBIT = dp->blue_sBIT = dp->green_sBIT = dp->alpha_sBIT = - dp->bit_depth; - dp->interlace_type = INTERLACE_FROM_ID(id); - dp->id = id; - /* All the rest are filled in after the read_info: */ - dp->w = 0; - dp->h = 0; - dp->npasses = 0; - dp->pixel_size = 0; - dp->bit_width = 0; - dp->cbRow = 0; - dp->do_interlace = do_interlace; - dp->is_transparent = 0; - /* Preset the transparent color to black: */ - memset(&dp->transparent, 0, sizeof dp->transparent); - /* Preset the palette to full intensity/opaque througout: */ - memset(dp->palette, 0xff, sizeof dp->palette); - -} - -/* Call this only if the colour type is 3 - PNG_COLOR_TYPE_PALETTE - otherwise - * it will png_error out. The API returns true if tRNS information was - * present. - */ -static int -standard_palette_init(standard_palette palette, png_structp pp, png_infop pi) -{ - png_colorp pal; - png_bytep trans_alpha; - int num; - - pal = 0; - num = -1; - if (png_get_PLTE(pp, pi, &pal, &num) & PNG_INFO_PLTE) - { - int i; - - for (i=0; i 256) - png_error(pp, "validate: unexpected png_get_tRNS (palette) result"); - - for (i=0; ibit_depth) - png_error(pp, "validate: bit depth changed"); - - if (png_get_color_type(pp, pi) != dp->colour_type) - png_error(pp, "validate: color type changed"); - - if (png_get_filter_type(pp, pi) != PNG_FILTER_TYPE_BASE) - png_error(pp, "validate: filter type changed"); - - if (png_get_interlace_type(pp, pi) != dp->interlace_type) - png_error(pp, "validate: interlacing changed"); - - if (png_get_compression_type(pp, pi) != PNG_COMPRESSION_TYPE_BASE) - png_error(pp, "validate: compression type changed"); - - dp->w = png_get_image_width(pp, pi); - - if (dp->w != standard_width(pp, dp->id)) - png_error(pp, "validate: image width changed"); - - dp->h = png_get_image_height(pp, pi); - - if (dp->h != standard_height(pp, dp->id)) - png_error(pp, "validate: image height changed"); - - /* Record (but don't check at present) the input sBIT according to the colour - * type information. - */ - { - png_color_8p sBIT = 0; - - if (png_get_sBIT(pp, pi, &sBIT) & PNG_INFO_sBIT) - { - int sBIT_invalid = 0; - - if (sBIT == 0) - png_error(pp, "validate: unexpected png_get_sBIT result"); - - if (dp->colour_type & PNG_COLOR_MASK_COLOR) - { - if (sBIT->red == 0 || sBIT->red > dp->bit_depth) - sBIT_invalid = 1; - else - dp->red_sBIT = sBIT->red; - - if (sBIT->green == 0 || sBIT->green > dp->bit_depth) - sBIT_invalid = 1; - else - dp->green_sBIT = sBIT->green; - - if (sBIT->blue == 0 || sBIT->blue > dp->bit_depth) - sBIT_invalid = 1; - else - dp->blue_sBIT = sBIT->blue; - } - - else /* !COLOR */ - { - if (sBIT->gray == 0 || sBIT->gray > dp->bit_depth) - sBIT_invalid = 1; - else - dp->blue_sBIT = dp->green_sBIT = dp->red_sBIT = sBIT->gray; - } - - /* All 8 bits in tRNS for a palette image are significant - see the - * spec. - */ - if (dp->colour_type & PNG_COLOR_MASK_ALPHA) - { - if (sBIT->alpha == 0 || sBIT->alpha > dp->bit_depth) - sBIT_invalid = 1; - else - dp->alpha_sBIT = sBIT->alpha; - } - - if (sBIT_invalid) - png_error(pp, "validate: sBIT value out of range"); - } - } - - /* Important: this is validating the value *before* any transforms have been - * put in place. It doesn't matter for the standard tests, where there are - * no transforms, but it does for other tests where rowbytes may change after - * png_read_update_info. - */ - if (png_get_rowbytes(pp, pi) != standard_rowsize(pp, dp->id)) - png_error(pp, "validate: row size changed"); - - /* The palette is never read for non-palette images, even though it is valid - * - this could be changed. - */ - if (dp->colour_type == 3) /* palette */ - { - int i; - - dp->is_transparent = standard_palette_init(dp->palette, pp, pi); - - /* And validate the result. */ - for (i=0; i<256; ++i) - if (dp->palette[i].red != i || dp->palette[i].green != i || - dp->palette[i].blue != i) - png_error(pp, "validate: color type 3 PLTE chunk changed"); - } - - /* In any case always check for a tranparent color: */ - { - png_color_16p trans_color = 0; - - if (png_get_tRNS(pp, pi, 0, 0, &trans_color) & PNG_INFO_tRNS) - { - if (trans_color == 0) - png_error(pp, "validate: unexpected png_get_tRNS (color) result"); - - switch (dp->colour_type) - { - case 0: - dp->transparent.red = dp->transparent.green = dp->transparent.blue = - trans_color->gray; - dp->is_transparent = 1; - break; - - case 2: - dp->transparent.red = trans_color->red; - dp->transparent.green = trans_color->green; - dp->transparent.blue = trans_color->blue; - dp->is_transparent = 1; - break; - - case 3: - /* Not expected because it should result in the array case - * above. - */ - png_error(pp, "validate: unexpected png_get_tRNS result"); - break; - - default: - png_error(pp, "validate: invalid tRNS chunk with alpha image"); - } - } - } - - /* Read the number of passes - expected to match the value used when - * creating the image (interlaced or not). This has the side effect of - * turning on interlace handling (if do_interlace is not set.) - */ - dp->npasses = npasses_from_interlace_type(pp, dp->interlace_type); - if (!dp->do_interlace && dp->npasses != png_set_interlace_handling(pp)) - png_error(pp, "validate: file changed interlace type"); - - /* Caller calls png_read_update_info or png_start_read_image now, then calls - * part2. - */ -} - -/* This must be called *after* the png_read_update_info call to get the correct - * 'rowbytes' value, otherwise png_get_rowbytes will refer to the untransformed - * image. - */ -static void -standard_info_part2(standard_display *dp, png_structp pp, png_infop pi, - int nImages) -{ - /* Record cbRow now that it can be found. */ - dp->pixel_size = bit_size(pp, png_get_color_type(pp, pi), - png_get_bit_depth(pp, pi)); - dp->bit_width = png_get_image_width(pp, pi) * dp->pixel_size; - dp->cbRow = png_get_rowbytes(pp, pi); - - /* Validate the rowbytes here again. */ - if (dp->cbRow != (dp->bit_width+7)/8) - png_error(pp, "bad png_get_rowbytes calculation"); - - /* Then ensure there is enough space for the output image(s). */ - store_ensure_image(dp->ps, pp, nImages * dp->cbRow * dp->h); -} - -static void -standard_info_imp(standard_display *dp, png_structp pp, png_infop pi, - int nImages) -{ - /* Note that the validation routine has the side effect of turning on - * interlace handling in the subsequent code. - */ - standard_info_part1(dp, pp, pi); - - /* And the info callback has to call this (or png_read_update_info - see - * below in the png_modifier code for that variant. - */ - png_start_read_image(pp); - - /* Validate the height, width and rowbytes plus ensure that sufficient buffer - * exists for decoding the image. - */ - standard_info_part2(dp, pp, pi, nImages); -} - -static void -standard_info(png_structp pp, png_infop pi) -{ - standard_display *dp = png_get_progressive_ptr(pp); - - /* Call with nImages==1 because the progressive reader can only produce one - * image. - */ - standard_info_imp(dp, pp, pi, 1 /*only one image*/); -} - -static void -progressive_row(png_structp pp, png_bytep new_row, png_uint_32 y, int pass) -{ - PNG_CONST standard_display *dp = png_get_progressive_ptr(pp); - - /* When handling interlacing some rows will be absent in each pass, the - * callback still gets called, but with a NULL pointer. This is checked - * in the 'else' clause below. We need our own 'cbRow', but we can't call - * png_get_rowbytes because we got no info structure. - */ - if (new_row != NULL) - { - png_bytep row; - - /* In the case where the reader doesn't do the interlace it gives - * us the y in the sub-image: - */ - if (dp->do_interlace && dp->interlace_type == PNG_INTERLACE_ADAM7) - y = PNG_ROW_FROM_PASS_ROW(y, pass); - - /* Validate this just in case. */ - if (y >= dp->h) - png_error(pp, "invalid y to progressive row callback"); - - row = dp->ps->image + y * dp->cbRow; - - /* Combine the new row into the old: */ - if (dp->do_interlace) - { - if (dp->interlace_type == PNG_INTERLACE_ADAM7) - deinterlace_row(row, new_row, dp->pixel_size, dp->w, pass); - else - memcpy(row, new_row, dp->cbRow); - } - else - png_progressive_combine_row(pp, row, new_row); - } else if (dp->interlace_type == PNG_INTERLACE_ADAM7 && - PNG_ROW_IN_INTERLACE_PASS(y, pass) && - PNG_PASS_COLS(dp->w, pass) > 0) - png_error(pp, "missing row in progressive de-interlacing"); -} - -static void -sequential_row(standard_display *dp, png_structp pp, png_infop pi, - PNG_CONST png_bytep pImage, PNG_CONST png_bytep pDisplay) -{ - PNG_CONST int npasses = dp->npasses; - PNG_CONST int do_interlace = dp->do_interlace && - dp->interlace_type == PNG_INTERLACE_ADAM7; - PNG_CONST png_uint_32 height = standard_height(pp, dp->id); - PNG_CONST png_uint_32 width = standard_width(pp, dp->id); - PNG_CONST size_t cbRow = dp->cbRow; - int pass; - - for (pass=0; pass 0 && PNG_ROW_IN_INTERLACE_PASS(y, pass)) - { - /* Read the row into a pair of temporary buffers, then do the - * merge here into the output rows. - */ - png_byte row[STANDARD_ROWMAX], display[STANDARD_ROWMAX]; - - /* The following aids (to some extent) error detection - we can - * see where png_read_row wrote. Use opposite values in row and - * display to make this easier. - */ - memset(row, 0xff, sizeof row); - memset(display, 0, sizeof display); - - png_read_row(pp, row, display); - - if (pRow1 != NULL) - deinterlace_row(pRow1, row, dp->pixel_size, dp->w, pass); - - if (pRow2 != NULL) - deinterlace_row(pRow2, display, dp->pixel_size, dp->w, pass); - } - } - else - png_read_row(pp, pRow1, pRow2); - - if (pRow1 != NULL) - pRow1 += cbRow; - - if (pRow2 != NULL) - pRow2 += cbRow; - } - } - - /* And finish the read operation (only really necessary if the caller wants - * to find additional data in png_info from chunks after the last IDAT.) - */ - png_read_end(pp, pi); -} - -static void -standard_row_validate(standard_display *dp, png_structp pp, png_const_bytep row, - png_const_bytep display, png_uint_32 y) -{ - png_byte std[STANDARD_ROWMAX]; - - memset(std, 0xff, sizeof std); - standard_row(pp, std, dp->id, y); - - /* At the end both the 'row' and 'display' arrays should end up identical. - * In earlier passes 'row' will be partially filled in, with only the pixels - * that have been read so far, but 'display' will have those pixels - * replicated to fill the unread pixels while reading an interlaced image. - * The side effect inside the libpng sequential reader is that the 'row' - * array retains the correct values for unwritten pixels within the row - * bytes, while the 'display' array gets bits off the end of the image (in - * the last byte) trashed. Unfortunately in the progressive reader the - * row bytes are always trashed, so we always do a pixel_cmp here even though - * a memcmp of all cbRow bytes will succeed for the sequential reader. - */ - if (row != NULL && pixel_cmp(std, row, dp->bit_width) != 0) - { - char msg[64]; - sprintf(msg, "PNG image row %d changed", y); - png_error(pp, msg); - } - - /* In this case use pixel_cmp because we need to compare a partial - * byte at the end of the row if the row is not an exact multiple - * of 8 bits wide. - */ - if (display != NULL && pixel_cmp(std, display, dp->bit_width) != 0) - { - char msg[64]; - sprintf(msg, "display row %d changed", y); - png_error(pp, msg); - } -} - -static void -standard_image_validate(standard_display *dp, png_structp pp, - png_const_bytep pImage, png_const_bytep pDisplay) -{ - png_uint_32 y; - - for (y=0; yh; ++y) - { - standard_row_validate(dp, pp, pImage, pDisplay, y); - - if (pImage != NULL) - pImage += dp->cbRow; - - if (pDisplay != NULL) - pDisplay += dp->cbRow; - } - - /* This avoids false positives if the validation code is never called! */ - dp->ps->validated = 1; -} - -static void -standard_end(png_structp pp, png_infop pi) -{ - standard_display *dp = png_get_progressive_ptr(pp); - - UNUSED(pi) - - /* Validate the image - progressive reading only produces one variant for - * interlaced images. - */ - standard_image_validate(dp, pp, dp->ps->image, NULL); -} - -/* A single test run checking the standard image to ensure it is not damaged. */ -static void -standard_test(png_store* PNG_CONST psIn, png_uint_32 PNG_CONST id, - int do_interlace) -{ - standard_display d; - context(psIn, fault); - - /* Set up the display (stack frame) variables from the arguments to the - * function and initialize the locals that are filled in later. - */ - standard_display_init(&d, psIn, id, do_interlace); - - /* Everything is protected by a Try/Catch. The functions called also - * typically have local Try/Catch blocks. - */ - Try - { - png_structp pp; - png_infop pi; - - /* Get a png_struct for reading the image. This will throw an error if it - * fails, so we don't need to check the result. - */ - pp = set_store_for_read(d.ps, &pi, d.id, - d.do_interlace ? (d.ps->progressive ? - "pngvalid progressive deinterlacer" : - "pngvalid sequential deinterlacer") : (d.ps->progressive ? - "progressive reader" : "sequential reader")); - - /* Introduce the correct read function. */ - if (d.ps->progressive) - { - png_set_progressive_read_fn(pp, &d, standard_info, progressive_row, - standard_end); - - /* Now feed data into the reader until we reach the end: */ - store_progressive_read(d.ps, pp, pi); - } - else - { - /* Note that this takes the store, not the display. */ - png_set_read_fn(pp, d.ps, store_read); - - /* Check the header values: */ - png_read_info(pp, pi); - - /* The code tests both versions of the images that the sequential - * reader can produce. - */ - standard_info_imp(&d, pp, pi, 2 /*images*/); - - /* Need the total bytes in the image below; we can't get to this point - * unless the PNG file values have been checked against the expected - * values. - */ - { - PNG_CONST png_bytep pImage = d.ps->image; - PNG_CONST png_bytep pDisplay = pImage + d.cbRow * d.h; - - sequential_row(&d, pp, pi, pImage, pDisplay); - - /* After the last pass loop over the rows again to check that the - * image is correct. - */ - standard_image_validate(&d, pp, pImage, pDisplay); - } - } - - /* Check for validation. */ - if (!d.ps->validated) - png_error(pp, "image read failed silently"); - - /* Successful completion. */ - } - - Catch(fault) - d.ps = fault; /* make sure this hasn't been clobbered. */ - - /* In either case clean up the store. */ - store_read_reset(d.ps); -} - -static int -test_standard(png_modifier* PNG_CONST pm, png_byte PNG_CONST colour_type, - int bdlo, int PNG_CONST bdhi) -{ - for (; bdlo <= bdhi; ++bdlo) - { - int interlace_type; - - for (interlace_type = PNG_INTERLACE_NONE; - interlace_type < PNG_INTERLACE_LAST; ++interlace_type) - { - standard_test(&pm->this, FILEID(colour_type, DEPTH(bdlo), - interlace_type, 0, 0, 0), 0/*do_interlace*/); - - if (fail(pm)) - return 0; - } - } - - return 1; /* keep going */ -} - -static void -perform_standard_test(png_modifier *pm) -{ - /* Test each colour type over the valid range of bit depths (expressed as - * log2(bit_depth) in turn, stop as soon as any error is detected. - */ - if (!test_standard(pm, 0, 0, READ_BDHI)) - return; - - if (!test_standard(pm, 2, 3, READ_BDHI)) - return; - - if (!test_standard(pm, 3, 0, 3)) - return; - - if (!test_standard(pm, 4, 3, READ_BDHI)) - return; - - if (!test_standard(pm, 6, 3, READ_BDHI)) - return; -} - - -/********************************** SIZE TESTS ********************************/ -static int -test_size(png_modifier* PNG_CONST pm, png_byte PNG_CONST colour_type, - int bdlo, int PNG_CONST bdhi) -{ - /* Run the tests on each combination. - * - * NOTE: on my 32 bit x86 each of the following blocks takes - * a total of 3.5 seconds if done across every combo of bit depth - * width and height. This is a waste of time in practice, hence the - * hinc and winc stuff: - */ - static PNG_CONST png_byte hinc[] = {1, 3, 11, 1, 5}; - static PNG_CONST png_byte winc[] = {1, 9, 5, 7, 1}; - for (; bdlo <= bdhi; ++bdlo) - { - png_uint_32 h, w; - - for (h=1; h<=16; h+=hinc[bdlo]) for (w=1; w<=16; w+=winc[bdlo]) - { - /* First test all the 'size' images against the sequential - * reader using libpng to deinterlace (where required.) This - * validates the write side of libpng. There are four possibilities - * to validate. - */ - standard_test(&pm->this, FILEID(colour_type, DEPTH(bdlo), - PNG_INTERLACE_NONE, w, h, 0), 0/*do_interlace*/); - - if (fail(pm)) - return 0; - - standard_test(&pm->this, FILEID(colour_type, DEPTH(bdlo), - PNG_INTERLACE_NONE, w, h, 1), 0/*do_interlace*/); - - if (fail(pm)) - return 0; - - standard_test(&pm->this, FILEID(colour_type, DEPTH(bdlo), - PNG_INTERLACE_ADAM7, w, h, 0), 0/*do_interlace*/); - - if (fail(pm)) - return 0; - - standard_test(&pm->this, FILEID(colour_type, DEPTH(bdlo), - PNG_INTERLACE_ADAM7, w, h, 1), 0/*do_interlace*/); - - if (fail(pm)) - return 0; - - /* Now validate the interlaced read side - do_interlace true, - * in the progressive case this does actually make a difference - * to the code used in the non-interlaced case too. - */ - standard_test(&pm->this, FILEID(colour_type, DEPTH(bdlo), - PNG_INTERLACE_NONE, w, h, 0), 1/*do_interlace*/); - - if (fail(pm)) - return 0; - - standard_test(&pm->this, FILEID(colour_type, DEPTH(bdlo), - PNG_INTERLACE_ADAM7, w, h, 0), 1/*do_interlace*/); - - if (fail(pm)) - return 0; - } - } - - return 1; /* keep going */ -} - -static void -perform_size_test(png_modifier *pm) -{ - /* Test each colour type over the valid range of bit depths (expressed as - * log2(bit_depth) in turn, stop as soon as any error is detected. - */ - if (!test_size(pm, 0, 0, READ_BDHI)) - return; - - if (!test_size(pm, 2, 3, READ_BDHI)) - return; - - /* For the moment don't do the palette test - it's a waste of time when - * compared to the greyscale test. - */ -#if 0 - if (!test_size(pm, 3, 0, 3)) - return; -#endif - - if (!test_size(pm, 4, 3, READ_BDHI)) - return; - - if (!test_size(pm, 6, 3, READ_BDHI)) - return; -} - - -/******************************* TRANSFORM TESTS ******************************/ -/* A set of tests to validate libpng image transforms. The possibilities here - * are legion because the transforms can be combined in a combinatorial - * fashion. To deal with this some measure of restraint is required, otherwise - * the tests would take forever. - */ -typedef struct image_pixel -{ - /* A local (pngvalid) representation of a PNG pixel, in all its - * various forms. - */ - unsigned int red, green, blue, alpha; /* For non-palette images. */ - unsigned int palette_index; /* For a palette image. */ - png_byte colour_type; /* As in the spec. */ - png_byte bit_depth; /* Defines bit size in row */ - png_byte sample_depth; /* Scale of samples */ - int have_tRNS; /* tRNS chunk may need processing */ - - /* For checking the code calculates double precision floating point values - * along with an error value, accumulated from the transforms. Because an - * sBIT setting allows larger error bounds (indeed, by the spec, apparently - * up to just less than +/-1 in the scaled value) the *lowest* sBIT for each - * channel is stored. This sBIT value is folded in to the stored error value - * at the end of the application of the transforms to the pixel. - */ - double redf, greenf, bluef, alphaf; - double rede, greene, bluee, alphae; - png_byte red_sBIT, green_sBIT, blue_sBIT, alpha_sBIT; -} image_pixel; - -/* Shared utility function, see below. */ -static void -image_pixel_setf(image_pixel *this, unsigned int max) -{ - this->redf = this->red / (double)max; - this->greenf = this->green / (double)max; - this->bluef = this->blue / (double)max; - this->alphaf = this->alpha / (double)max; - - if (this->red < max) - this->rede = this->redf * DBL_EPSILON; - else - this->rede = 0; - if (this->green < max) - this->greene = this->greenf * DBL_EPSILON; - else - this->greene = 0; - if (this->blue < max) - this->bluee = this->bluef * DBL_EPSILON; - else - this->bluee = 0; - if (this->alpha < max) - this->alphae = this->alphaf * DBL_EPSILON; - else - this->alphae = 0; -} - -/* Initialize the structure for the next pixel - call this before doing any - * transforms and call it for each pixel since all the fields may need to be - * reset. - */ -static void -image_pixel_init(image_pixel *this, png_const_bytep row, png_byte colour_type, - png_byte bit_depth, png_uint_32 x, standard_palette palette) -{ - PNG_CONST png_byte sample_depth = (png_byte)(colour_type == - PNG_COLOR_TYPE_PALETTE ? 8 : bit_depth); - PNG_CONST unsigned int max = (1U<palette_index = this->red = this->green = this->blue = - sample(row, colour_type, bit_depth, x, 0); - this->alpha = max; - this->red_sBIT = this->green_sBIT = this->blue_sBIT = this->alpha_sBIT = - sample_depth; - - /* Then override as appropriate: */ - if (colour_type == 3) /* palette */ - { - /* This permits the caller to default to the sample value. */ - if (palette != 0) - { - PNG_CONST unsigned int i = this->palette_index; - - this->red = palette[i].red; - this->green = palette[i].green; - this->blue = palette[i].blue; - this->alpha = palette[i].alpha; - } - } - - else /* not palette */ - { - unsigned int i = 0; - - if (colour_type & 2) - { - this->green = sample(row, colour_type, bit_depth, x, 1); - this->blue = sample(row, colour_type, bit_depth, x, 2); - i = 2; - } - if (colour_type & 4) - this->alpha = sample(row, colour_type, bit_depth, x, ++i); - } - - /* Calculate the scaled values, these are simply the values divided by - * 'max' and the error is initialized to the double precision epsilon value - * from the header file. - */ - image_pixel_setf(this, max); - - /* Store the input information for use in the transforms - these will - * modify the information. - */ - this->colour_type = colour_type; - this->bit_depth = bit_depth; - this->sample_depth = sample_depth; - this->have_tRNS = 0; -} - -/* Convert a palette image to an rgb image. This necessarily converts the tRNS - * chunk at the same time, because the tRNS will be in palette form. - */ -static void -image_pixel_convert_PLTE(image_pixel *this, const standard_display *display) -{ - if (this->colour_type == PNG_COLOR_TYPE_PALETTE) - { - PNG_CONST unsigned int i = this->palette_index; - - this->bit_depth = this->sample_depth; - this->red = display->palette[i].red; - this->green = display->palette[i].green; - this->blue = display->palette[i].blue; - this->red_sBIT = display->red_sBIT; - this->green_sBIT = display->green_sBIT; - this->blue_sBIT = display->blue_sBIT; - - if (this->have_tRNS) - { - this->alpha = display->palette[i].alpha; - this->colour_type = PNG_COLOR_TYPE_RGB_ALPHA; - this->have_tRNS = 0; - } - else - { - this->alpha = 255; - this->colour_type = PNG_COLOR_TYPE_RGB; - } - this->alpha_sBIT = 8; - - /* And regenerate the scaled values and all the errors, which are now set - * back to the initial values. - */ - image_pixel_setf(this, 255); - } -} - -/* Add an alpha channel, this will glom in the tRNS information because tRNS is - * not valid in an alpha image. The bit depth will invariably be set to at - * least 8. Palette images will be converted to alpha (using the above API). - */ -static void -image_pixel_add_alpha(image_pixel *this, const standard_display *display) -{ - if (this->colour_type == PNG_COLOR_TYPE_PALETTE) - image_pixel_convert_PLTE(this, display); - - if ((this->colour_type & PNG_COLOR_MASK_ALPHA) == 0) - { - if (this->colour_type == PNG_COLOR_TYPE_GRAY) - { - if (this->bit_depth < 8) - this->bit_depth = 8; - - if (this->have_tRNS) - { - this->have_tRNS = 0; - - /* Check the input, original, channel value here against the - * original tRNS gray chunk valie. - */ - if (this->red == display->transparent.red) - this->alphaf = 0; - else - this->alphaf = 1; - } - else - this->alphaf = 1; - - this->colour_type = PNG_COLOR_TYPE_GRAY_ALPHA; - } - - else if (this->colour_type == PNG_COLOR_TYPE_RGB) - { - if (this->have_tRNS) - { - this->have_tRNS = 0; - - /* Again, check the exact input values, not the current transformed - * value! - */ - if (this->red == display->transparent.red && - this->green == display->transparent.green && - this->blue == display->transparent.blue) - this->alphaf = 0; - else - this->alphaf = 1; - - this->colour_type = PNG_COLOR_TYPE_RGB_ALPHA; - } - } - - /* The error in the alpha is zero and the sBIT value comes from the - * original sBIT data (actually it will always be the original bit depth). - */ - this->alphae = 0; - this->alpha_sBIT = display->alpha_sBIT; - } -} - -struct transform_display; -typedef struct image_transform -{ - /* The name of this transform: a string. */ - PNG_CONST char *name; - - /* Each transform can be disabled from the command line: */ - int enable; - - /* The global list of transforms; read only. */ - struct image_transform *PNG_CONST list; - - /* The global count of the number of times this transform has been set on an - * image. - */ - unsigned int global_use; - - /* The local count of the number of times this transform has been set. */ - unsigned int local_use; - - /* The next transform in the list, each transform must call its own next - * transform after it has processed the pixel successfully. - */ - PNG_CONST struct image_transform *next; - - /* A single transform for the image, expressed as a series of function - * callbacks and some space for values. - * - * First a callback to set the transform on the current png_read_struct: - */ - void (*set)(PNG_CONST struct image_transform *this, - struct transform_display *that, png_structp pp, png_infop pi); - - /* Then a transform that takes an input pixel in one PNG format or another - * and modifies it by a pngvalid implementation of the transform (thus - * duplicating the libpng intent without, we hope, duplicating the bugs - * in the libpng implementation!) The png_structp is solely to allow error - * reporting via png_error and png_warning. - */ - void (*mod)(PNG_CONST struct image_transform *this, image_pixel *that, - png_structp pp, PNG_CONST struct transform_display *display); - - /* Add this transform to the list and return true if the transform is - * meaningful for this colour type and bit depth - if false then the - * transform should have no effect on the image so there's not a lot of - * point running it. - */ - int (*add)(struct image_transform *this, - PNG_CONST struct image_transform **that, png_byte colour_type, - png_byte bit_depth); -} image_transform; - -typedef struct transform_display -{ - standard_display this; - - /* Parameters */ - png_modifier* pm; - PNG_CONST image_transform* transform_list; - - /* Local variables */ - png_byte output_colour_type; - png_byte output_bit_depth; -} transform_display; - -/* Two functions to end the list: */ -static void -image_transform_set_end(PNG_CONST image_transform *this, - transform_display *that, png_structp pp, png_infop pi) -{ - UNUSED(this) - UNUSED(that) - UNUSED(pp) - UNUSED(pi) -} - -/* At the end of the list recalculate the output image pixel value from the - * double precision values set up by the preceding 'mod' calls: - */ -static unsigned int -sample_scale(double sample_value, unsigned int scale) -{ - sample_value = floor(sample_value * scale + .5); - - /* Return NaN as 0: */ - if (!(sample_value > 0)) - sample_value = 0; - else if (sample_value > scale) - sample_value = scale; - - return (unsigned int)sample_value; -} - -static void -image_transform_mod_end(PNG_CONST image_transform *this, image_pixel *that, - png_structp pp, PNG_CONST transform_display *display) -{ - PNG_CONST unsigned int scale = (1U<sample_depth)-1; - - UNUSED(this) - UNUSED(pp) - UNUSED(display) - - /* At the end recalculate the digitized red green and blue values according - * to the current sample_depth of the pixel. - * - * The sample value is simply scaled to the maximum, checking for over - * and underflow (which can both happen for some image transforms, - * including simple size scaling, though libpng doesn't do that at present. - */ - that->red = sample_scale(that->redf, scale); - - /* The error value is increased, at the end, according to the lowest sBIT - * value seen. Common sense tells us that the intermediate integer - * representations are no more accurate than +/- 0.5 in the integral values, - * the sBIT allows the implementation to be worse than this. In addition the - * PNG specification actually permits any error within the range (-1..+1), - * but that is ignored here. Instead the final digitized value is compared, - * below to the digitized value of the error limits - this has the net effect - * of allowing (almost) +/-1 in the output value. It's difficult to see how - * any algorithm that digitizes intermediate results can be more accurate. - */ - that->rede += 1./(2*((1U<red_sBIT)-1)); - - if (that->colour_type & PNG_COLOR_MASK_COLOR) - { - that->green = sample_scale(that->greenf, scale); - that->blue = sample_scale(that->bluef, scale); - that->greene += 1./(2*((1U<green_sBIT)-1)); - that->bluee += 1./(2*((1U<blue_sBIT)-1)); - } - else - { - that->blue = that->green = that->red; - that->bluef = that->greenf = that->redf; - that->bluee = that->greene = that->rede; - } - - if ((that->colour_type & PNG_COLOR_MASK_ALPHA) || - that->colour_type == PNG_COLOR_TYPE_PALETTE) - { - that->alpha = sample_scale(that->alphaf, scale); - that->alphae += 1./(2*((1U<alpha_sBIT)-1)); - } - else - { - that->alpha = scale; /* opaque */ - that->alpha = 1; /* Override this. */ - that->alphae = 0; /* It's exact ;-) */ - } -} - -/* Static 'end' structure: */ -static image_transform image_transform_end = -{ - "(end)", /* name */ - 1, /* enable */ - 0, /* list */ - 0, /* global_use */ - 0, /* local_use */ - 0, /* next */ - image_transform_set_end, - image_transform_mod_end, - 0 /* never called, I want it to crash if it is! */ -}; - -/* Reader callbacks and implementations, where they differ from the standard - * ones. - */ -static void -transform_display_init(transform_display *dp, png_modifier *pm, png_uint_32 id, - PNG_CONST image_transform *transform_list) -{ - /* Standard fields */ - standard_display_init(&dp->this, &pm->this, id, 0/*do_interlace*/); - - /* Parameter fields */ - dp->pm = pm; - dp->transform_list = transform_list; - - /* Local variable fields */ - dp->output_colour_type = 255; /* invalid */ - dp->output_bit_depth = 255; /* invalid */ -} - -static void -transform_info_imp(transform_display *dp, png_structp pp, png_infop pi) -{ - /* Reuse the standard stuff as appropriate. */ - standard_info_part1(&dp->this, pp, pi); - - /* Now set the list of transforms. */ - dp->transform_list->set(dp->transform_list, dp, pp, pi); - - /* Update the info structure for these transforms: */ - png_read_update_info(pp, pi); - - /* And get the output information into the standard_display */ - standard_info_part2(&dp->this, pp, pi, 1/*images*/); - - /* Plus the extra stuff we need for the transform tests: */ - dp->output_colour_type = png_get_color_type(pp, pi); - dp->output_bit_depth = png_get_bit_depth(pp, pi); - - /* Validate the combination of colour type and bit depth that we are getting - * out of libpng; the semantics of something not in the PNG spec are, at - * best, unclear. - */ - switch (dp->output_colour_type) - { - case PNG_COLOR_TYPE_PALETTE: - if (dp->output_bit_depth > 8) goto error; - /*FALL THROUGH*/ - case PNG_COLOR_TYPE_GRAY: - if (dp->output_bit_depth == 1 || dp->output_bit_depth == 2 || - dp->output_bit_depth == 4) - break; - /*FALL THROUGH*/ - default: - if (dp->output_bit_depth == 8 || dp->output_bit_depth == 16) - break; - /*FALL THROUGH*/ - error: - { - char message[128]; - size_t pos; - - pos = safecat(message, sizeof message, 0, - "invalid final bit depth: colour type("); - pos = safecatn(message, sizeof message, pos, dp->output_colour_type); - pos = safecat(message, sizeof message, pos, ") with bit depth: "); - pos = safecatn(message, sizeof message, pos, dp->output_bit_depth); - - png_error(pp, message); - } - } - - /* Use a test pixel to check that the output agrees with what we expect - - * this avoids running the whole test if the output is unexpected. - */ - { - image_pixel test_pixel; - - memset(&test_pixel, 0, sizeof test_pixel); - test_pixel.colour_type = dp->this.colour_type; /* input */ - test_pixel.bit_depth = dp->this.bit_depth; - if (test_pixel.colour_type == PNG_COLOR_TYPE_PALETTE) - test_pixel.sample_depth = 8; - else - test_pixel.sample_depth = test_pixel.bit_depth; - /* Don't need sBIT here */ - test_pixel.have_tRNS = dp->this.is_transparent; - - dp->transform_list->mod(dp->transform_list, &test_pixel, pp, dp); - - if (test_pixel.colour_type != dp->output_colour_type) - { - char message[128]; - size_t pos = safecat(message, sizeof message, 0, "colour type "); - - pos = safecatn(message, sizeof message, pos, dp->output_colour_type); - pos = safecat(message, sizeof message, pos, " expected "); - pos = safecatn(message, sizeof message, pos, test_pixel.colour_type); - - png_error(pp, message); - } - - if (test_pixel.bit_depth != dp->output_bit_depth) - { - char message[128]; - size_t pos = safecat(message, sizeof message, 0, "bit depth "); - - pos = safecatn(message, sizeof message, pos, dp->output_bit_depth); - pos = safecat(message, sizeof message, pos, " expected "); - pos = safecatn(message, sizeof message, pos, test_pixel.bit_depth); - - png_error(pp, message); - } - - /* If both bit depth and colour type are correct check the sample depth. - * I believe these are both internal errors. - */ - if (test_pixel.colour_type == PNG_COLOR_TYPE_PALETTE) - { - if (test_pixel.sample_depth != 8) /* oops - internal error! */ - png_error(pp, "pngvalid: internal: palette sample depth not 8"); - } - else if (test_pixel.sample_depth != dp->output_bit_depth) - { - char message[128]; - size_t pos = safecat(message, sizeof message, 0, - "internal: sample depth "); - - pos = safecatn(message, sizeof message, pos, dp->output_bit_depth); - pos = safecat(message, sizeof message, pos, " expected "); - pos = safecatn(message, sizeof message, pos, test_pixel.sample_depth); - - png_error(pp, message); - } - } -} - -static void -transform_info(png_structp pp, png_infop pi) -{ - transform_info_imp(png_get_progressive_ptr(pp), pp, pi); -} - -static void -transform_range_check(png_structp pp, unsigned int r, unsigned int g, - unsigned int b, unsigned int a, unsigned int in_digitized, double in, - unsigned int out, png_byte sample_depth, double err, PNG_CONST char *name) -{ - /* Compare the scaled, digitzed, values of our local calculation (in+-err) - * with the digitized values libpng produced; 'sample_depth' is the actual - * digitization depth of the libpng output colors (the bit depth except for - * palette images where it is always 8.) - */ - unsigned int max = (1U<= in_min && out <= in_max)) - { - char message[256]; - size_t pos; - - pos = safecat(message, sizeof message, 0, name); - pos = safecat(message, sizeof message, pos, " output value error: rgba("); - pos = safecatn(message, sizeof message, pos, r); - pos = safecat(message, sizeof message, pos, ","); - pos = safecatn(message, sizeof message, pos, g); - pos = safecat(message, sizeof message, pos, ","); - pos = safecatn(message, sizeof message, pos, b); - pos = safecat(message, sizeof message, pos, ","); - pos = safecatn(message, sizeof message, pos, a); - pos = safecat(message, sizeof message, pos, "): "); - pos = safecatn(message, sizeof message, pos, out); - pos = safecat(message, sizeof message, pos, " expected: "); - pos = safecatn(message, sizeof message, pos, in_digitized); - pos = safecat(message, sizeof message, pos, " ("); - pos = safecatd(message, sizeof message, pos, (in-err)*max, 3); - pos = safecat(message, sizeof message, pos, ".."); - pos = safecatd(message, sizeof message, pos, (in+err)*max, 3); - pos = safecat(message, sizeof message, pos, ")"); - - png_error(pp, message); - } -} - -static void -transform_image_validate(transform_display *dp, png_structp pp, png_infop pi, - png_const_bytep pRow) -{ - /* Constants for the loop below: */ - PNG_CONST png_byte in_ct = dp->this.colour_type; - PNG_CONST png_byte in_bd = dp->this.bit_depth; - PNG_CONST png_uint_32 w = dp->this.w; - PNG_CONST png_uint_32 h = dp->this.h; - PNG_CONST size_t cbRow = dp->this.cbRow; - PNG_CONST png_byte out_ct = dp->output_colour_type; - PNG_CONST png_byte out_bd = dp->output_bit_depth; - PNG_CONST png_byte sample_depth = (png_byte)(out_ct == - PNG_COLOR_TYPE_PALETTE ? 8 : out_bd); - PNG_CONST png_byte red_sBIT = dp->this.red_sBIT; - PNG_CONST png_byte green_sBIT = dp->this.green_sBIT; - PNG_CONST png_byte blue_sBIT = dp->this.blue_sBIT; - PNG_CONST png_byte alpha_sBIT = dp->this.alpha_sBIT; - PNG_CONST int have_tRNS = dp->this.is_transparent; - - standard_palette out_palette; - png_uint_32 y; - - UNUSED(pi) - - /* Read the palette corresponding to the output if the output colour type - * indicates a palette, othewise set out_palette to garbage. - */ - if (out_ct == PNG_COLOR_TYPE_PALETTE) - (void)standard_palette_init(out_palette, pp, pi); - else - memset(out_palette, 0x5e, sizeof out_palette); - - for (y=0; ythis.palette); - - in_pixel.red_sBIT = red_sBIT; - in_pixel.green_sBIT = green_sBIT; - in_pixel.blue_sBIT = blue_sBIT; - in_pixel.alpha_sBIT = alpha_sBIT; - in_pixel.have_tRNS = have_tRNS; - - /* For error detection, below. */ - r = in_pixel.red; - g = in_pixel.green; - b = in_pixel.blue; - a = in_pixel.alpha; - - dp->transform_list->mod(dp->transform_list, &in_pixel, pp, dp); - - /* Read the output pixel and compare it to what we got, we don't - * use the error field here, so no need to update sBIT. - */ - image_pixel_init(&out_pixel, pRow, out_ct, out_bd, x, out_palette); - - /* We don't expect changes to the index here even if the bit depth is - * changed. - */ - if (in_ct == PNG_COLOR_TYPE_PALETTE && - out_ct == PNG_COLOR_TYPE_PALETTE) - { - if (in_pixel.palette_index != out_pixel.palette_index) - png_error(pp, "unexpected transformed palette index"); - } - - /* Check the colours for palette images too - in fact the palette could - * be separately verified itself in most cases. - */ - if (in_pixel.red != out_pixel.red) - transform_range_check(pp, r, g, b, a, in_pixel.red, in_pixel.redf, - out_pixel.red, sample_depth, in_pixel.rede, "red/gray"); - - if ((out_ct & PNG_COLOR_MASK_COLOR) != 0 && - in_pixel.green != out_pixel.green) - transform_range_check(pp, r, g, b, a, in_pixel.green, - in_pixel.greenf, out_pixel.green, sample_depth, in_pixel.greene, - "green"); - - if ((out_ct & PNG_COLOR_MASK_COLOR) != 0 && - in_pixel.blue != out_pixel.blue) - transform_range_check(pp, r, g, b, a, in_pixel.blue, in_pixel.bluef, - out_pixel.blue, sample_depth, in_pixel.bluee, "blue"); - - if ((out_ct & PNG_COLOR_MASK_ALPHA) != 0 && - in_pixel.alpha != out_pixel.alpha) - transform_range_check(pp, r, g, b, a, in_pixel.alpha, - in_pixel.alphaf, out_pixel.alpha, sample_depth, in_pixel.alphae, - "alpha"); - } /* pixel (x) loop */ - } /* row (y) loop */ - - /* Record that something was actually checked to avoid a false positive. */ - dp->this.ps->validated = 1; -} - -static void -transform_end(png_structp pp, png_infop pi) -{ - transform_display *dp = png_get_progressive_ptr(pp); - - transform_image_validate(dp, pp, pi, dp->this.ps->image); -} - -/* A single test run. */ -static void -transform_test(png_modifier *pmIn, PNG_CONST png_uint_32 idIn, - PNG_CONST image_transform* transform_listIn, PNG_CONST char *name) -{ - transform_display d; - context(&pmIn->this, fault); - - transform_display_init(&d, pmIn, idIn, transform_listIn); - - Try - { - png_structp pp; - png_infop pi; - - /* Get a png_struct for writing the image. */ - pp = set_modifier_for_read(d.pm, &pi, d.this.id, name); - -# if 0 - /* Logging (debugging only) */ - { - char buffer[256]; - - (void)store_message(&d.pm->this, pp, buffer, sizeof buffer, 0, - "running test"); - - fprintf(stderr, "%s\n", buffer); - } -# endif - - /* Introduce the correct read function. */ - if (d.pm->this.progressive) - { - /* Share the row function with the standard implementation. */ - png_set_progressive_read_fn(pp, &d, transform_info, progressive_row, - transform_end); - - /* Now feed data into the reader until we reach the end: */ - modifier_progressive_read(d.pm, pp, pi); - } - else - { - /* modifier_read expects a png_modifier* */ - png_set_read_fn(pp, d.pm, modifier_read); - - /* Check the header values: */ - png_read_info(pp, pi); - - /* Process the 'info' requirements. Only one image is generated */ - transform_info_imp(&d, pp, pi); - - sequential_row(&d.this, pp, pi, NULL, d.this.ps->image); - - transform_image_validate(&d, pp, pi, d.this.ps->image); - } - - modifier_reset(d.pm); - } - - Catch(fault) - modifier_reset((png_modifier*)fault); -} - -/* The transforms: */ -#define ITSTRUCT(name) image_transform_##name -#define IT(name,prev)\ -static image_transform ITSTRUCT(name) =\ -{\ - #name,\ - 1, /*enable*/\ - &ITSTRUCT(prev), /*list*/\ - 0, /*global_use*/\ - 0, /*local_use*/\ - 0, /*next*/\ - image_transform_png_set_##name##_set,\ - image_transform_png_set_##name##_mod,\ - image_transform_png_set_##name##_add\ -} - -/* To save code: */ -static int -image_transform_default_add(image_transform *this, - PNG_CONST image_transform **that, png_byte colour_type, png_byte bit_depth) -{ - UNUSED(colour_type) - UNUSED(bit_depth) - - this->next = *that; - *that = this; - - return 1; -} - -/* png_set_palette_to_rgb */ -static void -image_transform_png_set_palette_to_rgb_set(PNG_CONST image_transform *this, - transform_display *that, png_structp pp, png_infop pi) -{ - png_set_palette_to_rgb(pp); - this->next->set(this->next, that, pp, pi); -} - -static void -image_transform_png_set_palette_to_rgb_mod(PNG_CONST image_transform *this, - image_pixel *that, png_structp pp, PNG_CONST transform_display *display) -{ - if (that->colour_type == PNG_COLOR_TYPE_PALETTE) - image_pixel_convert_PLTE(that, &display->this); - - this->next->mod(this->next, that, pp, display); -} - -static int -image_transform_png_set_palette_to_rgb_add(image_transform *this, - PNG_CONST image_transform **that, png_byte colour_type, png_byte bit_depth) -{ - UNUSED(bit_depth) - - this->next = *that; - *that = this; - - return colour_type == PNG_COLOR_TYPE_PALETTE; -} - -IT(palette_to_rgb, end); - - -/* png_set_tRNS_to_alpha */ -static void -image_transform_png_set_tRNS_to_alpha_set(PNG_CONST image_transform *this, - transform_display *that, png_structp pp, png_infop pi) -{ - png_set_tRNS_to_alpha(pp); - this->next->set(this->next, that, pp, pi); -} - -static void -image_transform_png_set_tRNS_to_alpha_mod(PNG_CONST image_transform *this, - image_pixel *that, png_structp pp, PNG_CONST transform_display *display) -{ - /* LIBPNG BUG: this always forces palette images to RGB. */ - if (that->colour_type == PNG_COLOR_TYPE_PALETTE) - image_pixel_convert_PLTE(that, &display->this); - - /* This effectively does an 'expand' only if there is some transparency to - * covert to an alpha channel. - */ - if (that->have_tRNS) - image_pixel_add_alpha(that, &display->this); - - /* LIBPNG BUG: otherwise libpng still expands to 8 bits! */ - else - { - if (that->bit_depth < 8) - that->bit_depth =8; - if (that->sample_depth < 8) - that->sample_depth = 8; - } - - this->next->mod(this->next, that, pp, display); -} - -static int -image_transform_png_set_tRNS_to_alpha_add(image_transform *this, - PNG_CONST image_transform **that, png_byte colour_type, png_byte bit_depth) -{ - UNUSED(bit_depth) - - this->next = *that; - *that = this; - - /* We don't know yet whether there will be a tRNS chunk, but we know that - * this transformation should do nothing if there already is an alpha - * channel. - */ - return (colour_type & PNG_COLOR_MASK_ALPHA) == 0; -} - -IT(tRNS_to_alpha,palette_to_rgb); - -/* png_set_gray_to_rgb */ -static void -image_transform_png_set_gray_to_rgb_set(PNG_CONST image_transform *this, - transform_display *that, png_structp pp, png_infop pi) -{ - png_set_gray_to_rgb(pp); - this->next->set(this->next, that, pp, pi); -} - -static void -image_transform_png_set_gray_to_rgb_mod(PNG_CONST image_transform *this, - image_pixel *that, png_structp pp, PNG_CONST transform_display *display) -{ - /* NOTE: we can actually pend the tRNS processing at this point because we - * can correctly recognize the original pixel value even though we have - * mapped the one gray channel to the three RGB ones, but in fact libpng - * doesn't do this, so we don't either. - */ - if ((that->colour_type & PNG_COLOR_MASK_COLOR) == 0 && that->have_tRNS) - image_pixel_add_alpha(that, &display->this); - - /* Simply expand the bit depth and alter the colour type as required. */ - if (that->colour_type == PNG_COLOR_TYPE_GRAY) - { - /* RGB images have a bit depth at least equal to '8' */ - if (that->bit_depth < 8) - that->sample_depth = that->bit_depth = 8; - - /* And just changing the colour type works here because the green and blue - * channels are being maintained in lock-step with the red/gray: - */ - that->colour_type = PNG_COLOR_TYPE_RGB; - } - - else if (that->colour_type == PNG_COLOR_TYPE_GRAY_ALPHA) - that->colour_type = PNG_COLOR_TYPE_RGB_ALPHA; - - this->next->mod(this->next, that, pp, display); -} - -static int -image_transform_png_set_gray_to_rgb_add(image_transform *this, - PNG_CONST image_transform **that, png_byte colour_type, png_byte bit_depth) -{ - UNUSED(bit_depth) - - this->next = *that; - *that = this; - - return (colour_type & PNG_COLOR_MASK_COLOR) == 0; -} - -IT(gray_to_rgb,tRNS_to_alpha); - -/* png_set_expand */ -static void -image_transform_png_set_expand_set(PNG_CONST image_transform *this, - transform_display *that, png_structp pp, png_infop pi) -{ - png_set_expand(pp); - this->next->set(this->next, that, pp, pi); -} - -static void -image_transform_png_set_expand_mod(PNG_CONST image_transform *this, - image_pixel *that, png_structp pp, PNG_CONST transform_display *display) -{ - /* The general expand case depends on what the colour type is: */ - if (that->colour_type == PNG_COLOR_TYPE_PALETTE) - image_pixel_convert_PLTE(that, &display->this); - else if (that->bit_depth < 8) /* grayscale */ - that->sample_depth = that->bit_depth = 8; - - if (that->have_tRNS) - image_pixel_add_alpha(that, &display->this); - - this->next->mod(this->next, that, pp, display); -} - -static int -image_transform_png_set_expand_add(image_transform *this, - PNG_CONST image_transform **that, png_byte colour_type, png_byte bit_depth) -{ - UNUSED(bit_depth) - - this->next = *that; - *that = this; - - /* 'expand' should do nothing for RGBA or GA input - no tRNS and the bit - * depth is at least 8 already. - */ - return (colour_type & PNG_COLOR_MASK_ALPHA) == 0; -} - -IT(expand,gray_to_rgb); - -/* png_set_expand_gray_1_2_4_to_8 - * LIBPNG BUG: this just does an 'expand' - */ -static void -image_transform_png_set_expand_gray_1_2_4_to_8_set( - PNG_CONST image_transform *this, transform_display *that, png_structp pp, - png_infop pi) -{ - png_set_expand_gray_1_2_4_to_8(pp); - this->next->set(this->next, that, pp, pi); -} - -static void -image_transform_png_set_expand_gray_1_2_4_to_8_mod( - PNG_CONST image_transform *this, image_pixel *that, png_structp pp, - PNG_CONST transform_display *display) -{ - image_transform_png_set_expand_mod(this, that, pp, display); -} - -static int -image_transform_png_set_expand_gray_1_2_4_to_8_add(image_transform *this, - PNG_CONST image_transform **that, png_byte colour_type, png_byte bit_depth) -{ - return image_transform_png_set_expand_add(this, that, colour_type, - bit_depth); -} - -IT(expand_gray_1_2_4_to_8, expand); - -/* png_set_strip_16 */ -static void -image_transform_png_set_strip_16_set(PNG_CONST image_transform *this, - transform_display *that, png_structp pp, png_infop pi) -{ - png_set_strip_16(pp); - this->next->set(this->next, that, pp, pi); -} - -static void -image_transform_png_set_strip_16_mod(PNG_CONST image_transform *this, - image_pixel *that, png_structp pp, PNG_CONST transform_display *display) -{ - if (that->bit_depth == 16) - { - that->sample_depth = that->bit_depth = 8; - if (that->red_sBIT > 8) that->red_sBIT = 8; - if (that->green_sBIT > 8) that->green_sBIT = 8; - if (that->blue_sBIT > 8) that->blue_sBIT = 8; - if (that->alpha_sBIT > 8) that->alpha_sBIT = 8; - -# ifndef PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED - /* The strip 16 algoirithm drops the low 8 bits rather than calculating - * 1/257, so we need to adjust the permitted errors appropriately: - */ - { - PNG_CONST double d = (255-128.5)/65535; - that->rede += d; - that->greene += d; - that->bluee += d; - that->alphae += d; - } -# endif - } - - this->next->mod(this->next, that, pp, display); -} - -static int -image_transform_png_set_strip_16_add(image_transform *this, - PNG_CONST image_transform **that, png_byte colour_type, png_byte bit_depth) -{ - UNUSED(colour_type) - - this->next = *that; - *that = this; - - return bit_depth > 8; -} - -IT(strip_16, expand_gray_1_2_4_to_8); - -/* png_set_strip_alpha */ -static void -image_transform_png_set_strip_alpha_set(PNG_CONST image_transform *this, - transform_display *that, png_structp pp, png_infop pi) -{ - png_set_strip_alpha(pp); - this->next->set(this->next, that, pp, pi); -} - -static void -image_transform_png_set_strip_alpha_mod(PNG_CONST image_transform *this, - image_pixel *that, png_structp pp, PNG_CONST transform_display *display) -{ - if (that->colour_type == PNG_COLOR_TYPE_GRAY_ALPHA) - that->colour_type = PNG_COLOR_TYPE_GRAY; - else if (that->colour_type == PNG_COLOR_TYPE_RGB_ALPHA) - that->colour_type = PNG_COLOR_TYPE_RGB; - - that->have_tRNS = 0; - that->alphaf = 1; - that->alphae = 0; - - this->next->mod(this->next, that, pp, display); -} - -static int -image_transform_png_set_strip_alpha_add(image_transform *this, - PNG_CONST image_transform **that, png_byte colour_type, png_byte bit_depth) -{ - UNUSED(bit_depth) - - this->next = *that; - *that = this; - - return (colour_type & PNG_COLOR_MASK_ALPHA) != 0; -} - -IT(strip_alpha,strip_16); - -/* png_set_rgb_to_gray(png_structp, int err_action, double red, double green) - * png_set_rgb_to_gray_fixed(png_structp, int err_action, png_fixed_point red, - * png_fixed_point green) - * png_get_rgb_to_gray_status - * - * At present the APIs are simply tested using the 16.16 fixed point conversion - * values known to be used inside libpng: - * - * red: 6968 - * green: 23434 - * blue: 2366 - * - * NOTE: this currently ignores the gamma because no gamma is being set, the - * tests on gamma need to happen in the gamma test set. - */ -static void -image_transform_png_set_rgb_to_gray_set(PNG_CONST image_transform *this, - transform_display *that, png_structp pp, png_infop pi) -{ - PNG_CONST int error_action = 1; /* no error, no defines in png.h */ - -# ifdef PNG_FLOATING_POINT_SUPPORTED - png_set_rgb_to_gray(pp, error_action, -1, -1); -# else - png_set_rgb_to_gray_fixed(pp, error_action, -1, -1); -# endif - - this->next->set(this->next, that, pp, pi); -} - -static void -image_transform_png_set_rgb_to_gray_mod(PNG_CONST image_transform *this, - image_pixel *that, png_structp pp, PNG_CONST transform_display *display) -{ - if ((that->colour_type & PNG_COLOR_MASK_COLOR) != 0) - { - if (that->colour_type == PNG_COLOR_TYPE_PALETTE) - image_pixel_convert_PLTE(that, &display->this); - - /* Image now has RGB channels... */ - that->bluef = that->greenf = that->redf = (that->redf * 6968 + - that->greenf * 23434 + that->bluef * 2366) / 32768; - that->bluee = that->greene = that->rede = (that->rede * 6968 + - that->greene * 23434 + that->bluee * 2366) / 32768 * - (1 + DBL_EPSILON * 6); - - /* The sBIT is the minium of the three colour channel sBITs. */ - if (that->red_sBIT > that->green_sBIT) - that->red_sBIT = that->green_sBIT; - if (that->red_sBIT > that->blue_sBIT) - that->red_sBIT = that->blue_sBIT; - that->blue_sBIT = that->green_sBIT = that->red_sBIT; - - /* And zap the colour bit in the type: */ - if (that->colour_type == PNG_COLOR_TYPE_RGB) - that->colour_type = PNG_COLOR_TYPE_GRAY; - else if (that->colour_type == PNG_COLOR_TYPE_RGB_ALPHA) - that->colour_type = PNG_COLOR_TYPE_GRAY_ALPHA; - } - - this->next->mod(this->next, that, pp, display); -} - -static int -image_transform_png_set_rgb_to_gray_add(image_transform *this, - PNG_CONST image_transform **that, png_byte colour_type, png_byte bit_depth) -{ - UNUSED(bit_depth) - - this->next = *that; - *that = this; - - return (colour_type & PNG_COLOR_MASK_COLOR) != 0; -} - -IT(rgb_to_gray,strip_alpha); - -/* png_set_background(png_structp, png_const_color_16p background_color, - * int background_gamma_code, int need_expand, double background_gamma) - * png_set_background_fixed(png_structp, png_const_color_16p background_color, - * int background_gamma_code, int need_expand, - * png_fixed_point background_gamma) - * - * As with rgb_to_gray this ignores the gamma. -*/ -static void -image_transform_png_set_background_set(PNG_CONST image_transform *this, - transform_display *that, png_structp pp, png_infop pi) -{ - png_color_16 back; - - /* Since we don't know the output bit depth at this point we must use the - * input values and ask libpng to expand the chunk as required. - */ - back.index = 255; /* Should not be used */ - back.gray = back.blue = back.green = back.red = - (png_uint_16)((1U << that->this.bit_depth) >> 1); - -# ifdef PNG_FLOATING_POINT_SUPPORTED - png_set_background(pp, &back, PNG_BACKGROUND_GAMMA_FILE, 1, 0); -# else - png_set_background_fixed(pp, &back, PNG_BACKGROUND_GAMMA_FILE, 1, 0); -# endif - - this->next->set(this->next, that, pp, pi); -} - -static void -image_transform_png_set_background_mod(PNG_CONST image_transform *this, - image_pixel *that, png_structp pp, PNG_CONST transform_display *display) -{ - /* Check for tRNS first: */ - if (that->have_tRNS && that->colour_type != PNG_COLOR_TYPE_PALETTE) - image_pixel_add_alpha(that, &display->this); - - /* This is only necessary if the alpha value is less than 1. */ - if (that->alphaf < 1) - { - /* Repeat the calculation above and scale the result: */ - unsigned int tmp = (1U << display->this.bit_depth); - double component = (tmp >> 1)/(double)(tmp-1); - - /* Now we do the background calculation without any gamma correction. */ - if (that->alphaf <= 0) - { - that->bluef = that->greenf = that->redf = component; - that->bluee = that->greene = that->rede = component * DBL_EPSILON; - that->blue_sBIT = that->green_sBIT = that->red_sBIT = that->bit_depth; - } - - else - { - component *= 1-that->alphaf; - that->redf = that->redf * that->alphaf + component; - that->rede = that->rede * that->alphaf + that->redf * 3 * DBL_EPSILON; - that->greenf = that->greenf * that->alphaf + component; - that->greene = that->greene * that->alphaf + that->greenf * 3 * - DBL_EPSILON; - that->bluef = that->bluef * that->alphaf + component; - that->bluee = that->bluee * that->alphaf + that->bluef * 3 * - DBL_EPSILON; - } - - /* Remove the alpha type and set the alpha. */ - that->alphaf = 1; - that->alphae = 0; - - if (that->colour_type == PNG_COLOR_TYPE_RGB_ALPHA) - that->colour_type = PNG_COLOR_TYPE_RGB; - else if (that->colour_type == PNG_COLOR_TYPE_GRAY_ALPHA) - that->colour_type = PNG_COLOR_TYPE_GRAY; - } - - this->next->mod(this->next, that, pp, display); -} - -#define image_transform_png_set_background_add image_transform_default_add - -IT(background,rgb_to_gray); - -static image_transform *PNG_CONST image_transform_first = &ITSTRUCT(background); - -static void -transform_enable(PNG_CONST char *name) -{ - /* Everything starts out enabled, so if we see an 'enable' disabled - * everything else the first time round. - */ - static int all_disabled = 0; - int found_it = 0; - image_transform *list = image_transform_first; - - while (list != &image_transform_end) - { - if (strcmp(list->name, name) == 0) - { - list->enable = 1; - found_it = 1; - } - else if (!all_disabled) - list->enable = 0; - - list = list->list; - } - - all_disabled = 1; - - if (!found_it) - { - fprintf(stderr, "pngvalid: --transform-enable=%s: unknown transform\n", - name); - exit(1); - } -} - -static void -transform_disable(PNG_CONST char *name) -{ - image_transform *list = image_transform_first; - - while (list != &image_transform_end) - { - if (strcmp(list->name, name) == 0) - { - list->enable = 0; - return; - } - - list = list->list; - } - - fprintf(stderr, "pngvalid: --transform-disable=%s: unknown transform\n", - name); - exit(1); -} - -static void -image_transform_reset_count(void) -{ - image_transform *next = image_transform_first; - int count = 0; - - while (next != &image_transform_end) - { - next->local_use = 0; - next->next = 0; - next = next->list; - ++count; - } - - /* This can only happen if we every have more than 32 transforms (excluding - * the end) in the list. - */ - if (count > 32) abort(); -} - -static int -image_transform_test_counter(png_uint_32 counter, unsigned int max) -{ - /* Test the list to see if there is any point contining, given a current - * counter and a 'max' value. - */ - image_transform *next = image_transform_first; - - while (next != &image_transform_end) - { - /* For max 0 or 1 continue until the counter overflows: */ - counter >>= 1; - - /* Continue if any entry hasn't reacked the max. */ - if (max > 1 && next->local_use < max) - return 1; - next = next->list; - } - - return max <= 1 && counter == 0; -} - -static png_uint_32 -image_transform_add(PNG_CONST image_transform **this, unsigned int max, - png_uint_32 counter, char *name, size_t sizeof_name, size_t *pos, - png_byte colour_type, png_byte bit_depth) -{ - for (;;) /* until we manage to add something */ - { - png_uint_32 mask; - image_transform *list; - - /* Find the next counter value, if the counter is zero this is the start - * of the list. This routine always returns the current counter (not the - * next) so it returns 0 at the end and expects 0 at the beginning. - */ - if (counter == 0) /* first time */ - { - image_transform_reset_count(); - if (max <= 1) - counter = 1; - else - counter = random_32(); - } - else /* advance the counter */ - { - switch (max) - { - case 0: ++counter; break; - case 1: counter <<= 1; break; - default: counter = random_32(); break; - } - } - - /* Now add all these items, if possible */ - *this = &image_transform_end; - list = image_transform_first; - mask = 1; - - /* Go through the whole list adding anything that the counter selects: */ - while (list != &image_transform_end) - { - if ((counter & mask) != 0 && list->enable && - (max == 0 || list->local_use < max)) - { - /* Candidate to add: */ - if (list->add(list, this, colour_type, bit_depth) || max == 0) - { - /* Added, so add to the name too. */ - *pos = safecat(name, sizeof_name, *pos, " +"); - *pos = safecat(name, sizeof_name, *pos, list->name); - } - - else - { - /* Not useful and max>0, so remvoe it from *this: */ - *this = list->next; - list->next = 0; - - /* And, since we know it isn't useful, stop it being added again - * in this run: - */ - list->local_use = max; - } - } - - mask <<= 1; - list = list->list; - } - - /* Now if anything was added we have something to do. */ - if (*this != &image_transform_end) - return counter; - - /* Nothing added, but was there anything in there to add? */ - if (!image_transform_test_counter(counter, max)) - return 0; - } -} - -#ifdef THIS_IS_THE_PROFORMA -static void -image_transform_png_set_@_set(PNG_CONST image_transform *this, - transform_display *that, png_structp pp, png_infop pi) -{ - png_set_@(pp); - this->next->set(this->next, that, pp, pi); -} - -static void -image_transform_png_set_@_mod(PNG_CONST image_transform *this, - image_pixel *that, png_structp pp, PNG_CONST transform_display *display) -{ - this->next->mod(this->next, that, pp, display); -} - -static int -image_transform_png_set_@_add(image_transform *this, - PNG_CONST image_transform **that, char *name, size_t sizeof_name, - size_t *pos, png_byte colour_type, png_byte bit_depth) -{ - this->next = *that; - *that = this; - - *pos = safecat(name, sizeof_name, *pos, " +@"); - - return 1; -} - -IT(@); -#endif - -/* png_set_quantize(png_structp, png_colorp palette, int num_palette, - * int maximum_colors, png_const_uint_16p histogram, int full_quantize) - * - * Very difficult to validate this! - */ -/*NOTE: TBD NYI */ - -/* The data layout transforms are handled by swapping our own channel data, - * necessarily these need to happen at the end of the transform list because the - * semantic of the channels changes after these are executed. Some of these, - * like set_shift and set_packing, can't be done at present because they change - * the layout of the data at the sub-sample level so sample() won't get the - * right answer. - */ -/* png_set_invert_alpha */ -/*NOTE: TBD NYI */ - -/* png_set_bgr */ -/*NOTE: TBD NYI */ - -/* png_set_swap_alpha */ -/*NOTE: TBD NYI */ - -/* png_set_swap */ -/*NOTE: TBD NYI */ - -/* png_set_filler, (png_structp png_ptr, png_uint_32 filler, int flags)); */ -/*NOTE: TBD NYI */ - -/* png_set_add_alpha, (png_structp png_ptr, png_uint_32 filler, int flags)); */ -/*NOTE: TBD NYI */ - -/* png_set_packing */ -/*NOTE: TBD NYI */ - -/* png_set_packswap */ -/*NOTE: TBD NYI */ - -/* png_set_invert_mono */ -/*NOTE: TBD NYI */ - -/* png_set_shift(png_structp, png_const_color_8p true_bits) */ -/*NOTE: TBD NYI */ - -static int -test_transform(png_modifier* PNG_CONST pm, png_byte PNG_CONST colour_type, - int bdlo, int PNG_CONST bdhi, png_uint_32 max) -{ - for (; bdlo <= bdhi; ++bdlo) - { - PNG_CONST png_byte bit_depth = DEPTH(bdlo); - png_uint_32 counter = 0; - size_t base_pos; - char name[64]; - - base_pos = safecat(name, sizeof name, 0, "transform:"); - - for (;;) - { - size_t pos = base_pos; - PNG_CONST image_transform *list = 0; - - counter = image_transform_add(&list, max, counter, name, sizeof name, - &pos, colour_type, bit_depth); - - if (counter == 0) - break; - - /* The command line can change this to checking interlaced images. */ - transform_test(pm, FILEID(colour_type, bit_depth, pm->interlace_type, - 0, 0, 0), list, name); - - if (fail(pm)) - return 0; - } - } - - return 1; /* keep going */ -} - -static void -perform_transform_test(png_modifier *pm) -{ - /* Test each colour type over the valid range of bit depths (expressed as - * log2(bit_depth) in turn, stop as soon as any error is detected. - */ - if (!test_transform(pm, 0, 0, READ_BDHI, 1)) - return; - - if (!test_transform(pm, 2, 3, READ_BDHI, 1)) - return; - - if (!test_transform(pm, 3, 0, 3, 1)) - return; - - if (!test_transform(pm, 4, 3, READ_BDHI, 1)) - return; - - if (!test_transform(pm, 6, 3, READ_BDHI, 1)) - return; -} - - -/********************************* GAMMA TESTS ********************************/ -/* Gamma test images. */ -typedef struct gamma_modification -{ - png_modification this; - png_fixed_point gamma; -} gamma_modification; - -static int -gamma_modify(png_modifier *pm, png_modification *me, int add) -{ - UNUSED(add) - /* This simply dumps the given gamma value into the buffer. */ - png_save_uint_32(pm->buffer, 4); - png_save_uint_32(pm->buffer+4, CHUNK_gAMA); - png_save_uint_32(pm->buffer+8, ((gamma_modification*)me)->gamma); - return 1; -} - -static void -gamma_modification_init(gamma_modification *me, png_modifier *pm, double gammad) -{ - double g; - - modification_init(&me->this); - me->this.chunk = CHUNK_gAMA; - me->this.modify_fn = gamma_modify; - me->this.add = CHUNK_PLTE; - g = floor(gammad * 100000 + .5); - me->gamma = (png_fixed_point)g; - me->this.next = pm->modifications; - pm->modifications = &me->this; -} - -typedef struct srgb_modification -{ - png_modification this; - png_byte intent; -} srgb_modification; - -static int -srgb_modify(png_modifier *pm, png_modification *me, int add) -{ - UNUSED(add) - /* As above, ignore add and just make a new chunk */ - png_save_uint_32(pm->buffer, 1); - png_save_uint_32(pm->buffer+4, CHUNK_sRGB); - pm->buffer[8] = ((srgb_modification*)me)->intent; - return 1; -} - -static void -srgb_modification_init(srgb_modification *me, png_modifier *pm, png_byte intent) -{ - modification_init(&me->this); - me->this.chunk = CHUNK_sBIT; - - if (intent <= 3) /* if valid, else *delete* sRGB chunks */ - { - me->this.modify_fn = srgb_modify; - me->this.add = CHUNK_PLTE; - me->intent = intent; - } - - else - { - me->this.modify_fn = 0; - me->this.add = 0; - me->intent = 0; - } - - me->this.next = pm->modifications; - pm->modifications = &me->this; -} - -typedef struct sbit_modification -{ - png_modification this; - png_byte sbit; -} sbit_modification; - -static int -sbit_modify(png_modifier *pm, png_modification *me, int add) -{ - png_byte sbit = ((sbit_modification*)me)->sbit; - if (pm->bit_depth > sbit) - { - int cb = 0; - switch (pm->colour_type) - { - case 0: - cb = 1; - break; - - case 2: - case 3: - cb = 3; - break; - - case 4: - cb = 2; - break; - - case 6: - cb = 4; - break; - - default: - png_error(pm->this.pread, - "unexpected colour type in sBIT modification"); - } - - png_save_uint_32(pm->buffer, cb); - png_save_uint_32(pm->buffer+4, CHUNK_sBIT); - - while (cb > 0) - (pm->buffer+8)[--cb] = sbit; - - return 1; - } - else if (!add) - { - /* Remove the sBIT chunk */ - pm->buffer_count = pm->buffer_position = 0; - return 1; - } - else - return 0; /* do nothing */ -} - -static void -sbit_modification_init(sbit_modification *me, png_modifier *pm, png_byte sbit) -{ - modification_init(&me->this); - me->this.chunk = CHUNK_sBIT; - me->this.modify_fn = sbit_modify; - me->this.add = CHUNK_PLTE; - me->sbit = sbit; - me->this.next = pm->modifications; - pm->modifications = &me->this; -} - -/* Reader callbacks and implementations, where they differ from the standard - * ones. - */ -typedef struct gamma_display -{ - standard_display this; - - /* Parameters */ - png_modifier* pm; - double file_gamma; - double screen_gamma; - png_byte sbit; - int threshold_test; - PNG_CONST char* name; - int speed; - int use_input_precision; - int strip16; - - /* Local variables */ - double maxerrout; - double maxerrpc; - double maxerrabs; -} gamma_display; - -static void -gamma_display_init(gamma_display *dp, png_modifier *pm, png_uint_32 id, - double file_gamma, double screen_gamma, png_byte sbit, int threshold_test, - int speed, int use_input_precision, int strip16) -{ - /* Standard fields */ - standard_display_init(&dp->this, &pm->this, id, 0/*do_interlace*/); - - /* Parameter fields */ - dp->pm = pm; - dp->file_gamma = file_gamma; - dp->screen_gamma = screen_gamma; - dp->sbit = sbit; - dp->threshold_test = threshold_test; - dp->speed = speed; - dp->use_input_precision = use_input_precision; - dp->strip16 = strip16; - - /* Local variable fields */ - dp->maxerrout = dp->maxerrpc = dp->maxerrabs = 0; -} - -static void -gamma_info_imp(gamma_display *dp, png_structp pp, png_infop pi) -{ - /* Reuse the standard stuff as appropriate. */ - standard_info_part1(&dp->this, pp, pi); - - /* If requested strip 16 to 8 bits - this is handled automagically below - * because the output bit depth is read from the library. Note that there - * are interactions with sBIT but, internally, libpng makes sbit at most - * PNG_MAX_GAMMA_8 when doing the following. - */ - if (dp->strip16) -# ifdef PNG_READ_16_TO_8_SUPPORTED - png_set_strip_16(pp); -# else - png_error(pp, "strip16 (16 to 8 bit conversion) not supported"); -# endif - - png_read_update_info(pp, pi); - - /* Now we may get a different cbRow: */ - standard_info_part2(&dp->this, pp, pi, 1 /*images*/); -} - -static void -gamma_info(png_structp pp, png_infop pi) -{ - gamma_info_imp(png_get_progressive_ptr(pp), pp, pi); -} - -static void -gamma_image_validate(gamma_display *dp, png_structp pp, png_infop pi, - png_const_bytep pRow) -{ - /* Get some constants derived from the input and output file formats: */ - PNG_CONST png_byte sbit = dp->sbit; - PNG_CONST double file_gamma = dp->file_gamma; - PNG_CONST double screen_gamma = dp->screen_gamma; - PNG_CONST int use_input_precision = dp->use_input_precision; - PNG_CONST int speed = dp->speed; - PNG_CONST png_byte in_ct = dp->this.colour_type; - PNG_CONST png_byte in_bd = dp->this.bit_depth; - PNG_CONST png_uint_32 w = dp->this.w; - PNG_CONST png_uint_32 h = dp->this.h; - PNG_CONST size_t cbRow = dp->this.cbRow; - PNG_CONST png_byte out_ct = png_get_color_type(pp, pi); - PNG_CONST png_byte out_bd = png_get_bit_depth(pp, pi); - PNG_CONST unsigned int outmax = (1U<pm, out_bd); - PNG_CONST double maxout = outerr(dp->pm, out_bd); - PNG_CONST double maxpc = pcerr(dp->pm, out_bd); - - /* There are three sources of error, firstly the quantization in the - * file encoding, determined by sbit and/or the file depth, secondly - * the output (screen) gamma and thirdly the output file encoding. - * - * Since this API receives the screen and file gamma in double - * precision it is possible to calculate an exact answer given an input - * pixel value. Therefore we assume that the *input* value is exact - - * sample/maxsample - calculate the corresponding gamma corrected - * output to the limits of double precision arithmetic and compare with - * what libpng returns. - * - * Since the library must quantize the output to 8 or 16 bits there is - * a fundamental limit on the accuracy of the output of +/-.5 - this - * quantization limit is included in addition to the other limits - * specified by the paramaters to the API. (Effectively, add .5 - * everywhere.) - * - * The behavior of the 'sbit' paramter is defined by section 12.5 - * (sample depth scaling) of the PNG spec. That section forces the - * decoder to assume that the PNG values have been scaled if sBIT is - * present: - * - * png-sample = floor( input-sample * (max-out/max-in) + .5); - * - * This means that only a subset of the possible PNG values should - * appear in the input. However, the spec allows the encoder to use a - * variety of approximations to the above and doesn't require any - * restriction of the values produced. - * - * Nevertheless the spec requires that the upper 'sBIT' bits of the - * value stored in a PNG file be the original sample bits. - * Consequently the code below simply scales the top sbit bits by - * (1<= - PNG_GAMMA_THRESHOLD && !dp->threshold_test && !speed && in_ct != 3) || - in_bd != out_bd; - - PNG_CONST unsigned int samples_per_pixel = (out_ct & 2U) ? 3U : 1U; - - PNG_CONST double gamma_correction = 1/(file_gamma*screen_gamma);/* Overall */ - - double maxerrout = 0, maxerrabs = 0, maxerrpc = 0; - png_uint_32 y; - - for (y=0; y> (in_bd-sbit); - - double i, input_sample, encoded_sample, output; - double encoded_error, error; - double es_lo, es_hi; - - /* First check on the 'perfect' result obtained from the - * digitized input value, id, and compare this against the - * actual digitized result, 'od'. 'i' is the input result - * in the range 0..1: - * - * NOTE: sBIT should be taken into account here but isn't, - * as described above. - */ - i = isbit; i /= (1U< maxerrout) - maxerrout = encoded_error; - - if (encoded_error < .5+maxout) - continue; - - /* There may be an error, so calculate the actual sample - * values - unencoded light intensity values. Note that - * in practice these are not unencoded because they - * include a 'viewing correction' to decrease or - * (normally) increase the perceptual contrast of the - * image. There's nothing we can do about this - we don't - * know what it is - so assume the unencoded value is - * perceptually linear. - */ - input_sample = pow(i, 1/file_gamma); /* In range 0..1 */ - output = od; - output /= outmax; - output = pow(output, screen_gamma); - - /* Now we have the numbers for real errors, both absolute - * values as as a percentage of the correct value (output): - */ - error = fabs(input_sample-output); - - if (error > maxerrabs) - maxerrabs = error; - - /* The following is an attempt to ignore the tendency of - * quantization to dominate the percentage errors for low - * output sample values: - */ - if (input_sample*maxpc > .5+maxabs) - { - double percentage_error = error/input_sample; - if (percentage_error > maxerrpc) maxerrpc = percentage_error; - } - - /* Now calculate the digitization limits for - * 'encoded_sample' using the 'max' values. Note that - * maxout is in the encoded space but maxpc and maxabs are - * in linear light space. - * - * First find the maximum error in linear light space, - * range 0..1: - */ - { - double tmp = input_sample * maxpc; - if (tmp < maxabs) tmp = maxabs; - - /* Low bound - the minimum of the three: */ - es_lo = encoded_sample - maxout; - - if (es_lo > 0 && input_sample-tmp > 0) - { - double low_value = outmax * pow(input_sample-tmp, - 1/screen_gamma); - if (low_value < es_lo) es_lo = low_value; - } - - else - es_lo = 0; - - es_hi = encoded_sample + maxout; - - if (es_hi < outmax && input_sample+tmp < 1) - { - double high_value = outmax * pow(input_sample+tmp, - 1/screen_gamma); - if (high_value > es_hi) es_hi = high_value; - } - - else - es_hi = outmax; - } - - /* The primary test is that the final encoded value - * returned by the library should be between the two limits - * (inclusive) that were calculated above. At this point - * quantization of the output must be taken into account. - */ - if (od+.5 < es_lo || od-.5 > es_hi) - { - /* There has been an error in processing. */ - double is_lo, is_hi; - - if (use_input_precision) - { - /* Ok, something is wrong - this actually happens in - * current libpng sbit processing. Assume that the - * input value (id, adjusted for sbit) can be - * anywhere between value-.5 and value+.5 - quite a - * large range if sbit is low. - */ - double tmp = (isbit - .5)/((1U< 0) - { - is_lo = outmax * pow(tmp, gamma_correction) - maxout; - if (is_lo < 0) is_lo = 0; - } - - else - is_lo = 0; - - tmp = (isbit + .5)/((1U< outmax) is_hi = outmax; - } - - else - is_hi = outmax; - - if (!(od+.5 < is_lo || od-.5 > is_hi)) - continue; - } - else - is_lo = es_lo, is_hi = es_hi; - - { - char msg[256]; - - sprintf(msg, - "error: %.3f; %u{%u;%u} -> %u not %.2f (%.1f-%.1f)", - od-encoded_sample, id, sbit, isbit, od, - encoded_sample, is_lo, is_hi); - - png_warning(pp, msg); - } - } - } - } - - else if (!speed && memcmp(std, pRow, cbRow) != 0) - { - char msg[64]; - - /* No transform is expected on the threshold tests. */ - sprintf(msg, "gamma: below threshold row %d changed", y); - - png_error(pp, msg); - } - } /* row (y) loop */ - - dp->maxerrout = maxerrout; - dp->maxerrabs = maxerrabs; - dp->maxerrpc = maxerrpc; - dp->this.ps->validated = 1; -} - -static void -gamma_end(png_structp pp, png_infop pi) -{ - gamma_display *dp = png_get_progressive_ptr(pp); - - gamma_image_validate(dp, pp, pi, dp->this.ps->image); -} - -/* A single test run checking a gamma transformation. - * - * maxabs: maximum absolute error as a fraction - * maxout: maximum output error in the output units - * maxpc: maximum percentage error (as a percentage) - */ -static void -gamma_test(png_modifier *pmIn, PNG_CONST png_byte colour_typeIn, - PNG_CONST png_byte bit_depthIn, PNG_CONST int interlace_typeIn, - PNG_CONST double file_gammaIn, PNG_CONST double screen_gammaIn, - PNG_CONST png_byte sbitIn, PNG_CONST int threshold_testIn, - PNG_CONST char *name, PNG_CONST int speedIn, - PNG_CONST int use_input_precisionIn, PNG_CONST int strip16In) -{ - gamma_display d; - context(&pmIn->this, fault); - - gamma_display_init(&d, pmIn, FILEID(colour_typeIn, bit_depthIn, - interlace_typeIn, 0, 0, 0), file_gammaIn, screen_gammaIn, sbitIn, - threshold_testIn, speedIn, use_input_precisionIn, strip16In); - - Try - { - png_structp pp; - png_infop pi; - gamma_modification gamma_mod; - srgb_modification srgb_mod; - sbit_modification sbit_mod; - - /* Make an appropriate modifier to set the PNG file gamma to the - * given gamma value and the sBIT chunk to the given precision. - */ - d.pm->modifications = NULL; - gamma_modification_init(&gamma_mod, d.pm, d.file_gamma); - srgb_modification_init(&srgb_mod, d.pm, 127 /*delete*/); - sbit_modification_init(&sbit_mod, d.pm, d.sbit); - - modification_reset(d.pm->modifications); - - /* Get a png_struct for writing the image. */ - pp = set_modifier_for_read(d.pm, &pi, d.this.id, name); - - /* Set up gamma processing. */ -#ifdef PNG_FLOATING_POINT_SUPPORTED - png_set_gamma(pp, d.screen_gamma, d.file_gamma); -#else - { - png_fixed_point s = floor(d.screen_gamma*100000+.5); - png_fixed_point f = floor(d.file_gamma*100000+.5); - png_set_gamma_fixed(pp, s, f); - } -#endif - - /* Introduce the correct read function. */ - if (d.pm->this.progressive) - { - /* Share the row function with the standard implementation. */ - png_set_progressive_read_fn(pp, &d, gamma_info, progressive_row, - gamma_end); - - /* Now feed data into the reader until we reach the end: */ - modifier_progressive_read(d.pm, pp, pi); - } - else - { - /* modifier_read expects a png_modifier* */ - png_set_read_fn(pp, d.pm, modifier_read); - - /* Check the header values: */ - png_read_info(pp, pi); - - /* Process the 'info' requirements. Only one image is generated */ - gamma_info_imp(&d, pp, pi); - - sequential_row(&d.this, pp, pi, NULL, d.this.ps->image); - - gamma_image_validate(&d, pp, pi, d.this.ps->image); - } - - modifier_reset(d.pm); - - if (d.pm->log && !d.threshold_test && !d.speed) - fprintf(stderr, "%d bit %s %s: max error %f (%.2g, %2g%%)\n", - d.this.bit_depth, colour_types[d.this.colour_type], d.name, - d.maxerrout, d.maxerrabs, 100*d.maxerrpc); - - /* Log the summary values too. */ - if (d.this.colour_type == 0 || d.this.colour_type == 4) - { - switch (d.this.bit_depth) - { - case 1: - break; - - case 2: - if (d.maxerrout > d.pm->error_gray_2) - d.pm->error_gray_2 = d.maxerrout; - - break; - - case 4: - if (d.maxerrout > d.pm->error_gray_4) - d.pm->error_gray_4 = d.maxerrout; - - break; - - case 8: - if (d.maxerrout > d.pm->error_gray_8) - d.pm->error_gray_8 = d.maxerrout; - - break; - - case 16: - if (d.maxerrout > d.pm->error_gray_16) - d.pm->error_gray_16 = d.maxerrout; - - break; - - default: - png_error(pp, "bad bit depth (internal: 1)"); - } - } - - else if (d.this.colour_type == 2 || d.this.colour_type == 6) - { - switch (d.this.bit_depth) - { - case 8: - - if (d.maxerrout > d.pm->error_color_8) - d.pm->error_color_8 = d.maxerrout; - - break; - - case 16: - - if (d.maxerrout > d.pm->error_color_16) - d.pm->error_color_16 = d.maxerrout; - - break; - - default: - png_error(pp, "bad bit depth (internal: 2)"); - } - } - } - - Catch(fault) - modifier_reset((png_modifier*)fault); -} - -static void gamma_threshold_test(png_modifier *pm, png_byte colour_type, - png_byte bit_depth, int interlace_type, double file_gamma, - double screen_gamma) -{ - size_t pos = 0; - char name[64]; - pos = safecat(name, sizeof name, pos, "threshold "); - pos = safecatd(name, sizeof name, pos, file_gamma, 3); - pos = safecat(name, sizeof name, pos, "/"); - pos = safecatd(name, sizeof name, pos, screen_gamma, 3); - - (void)gamma_test(pm, colour_type, bit_depth, interlace_type, file_gamma, - screen_gamma, bit_depth, 1, name, 0 /*speed*/, 0 /*no input precision*/, - 0 /*no strip16*/); -} - -static void -perform_gamma_threshold_tests(png_modifier *pm) -{ - png_byte colour_type = 0; - png_byte bit_depth = 0; - - while (next_format(&colour_type, &bit_depth)) - { - double test_gamma = 1.0; - while (test_gamma >= .4) - { - /* There's little point testing the interlacing vs non-interlacing, - * but this can be set from the command line. - */ - gamma_threshold_test(pm, colour_type, bit_depth, pm->interlace_type, - test_gamma, 1/test_gamma); - test_gamma *= .95; - } - - /* And a special test for sRGB */ - gamma_threshold_test(pm, colour_type, bit_depth, pm->interlace_type, - .45455, 2.2); - - if (fail(pm)) - return; - } -} - -static void gamma_transform_test(png_modifier *pm, - PNG_CONST png_byte colour_type, PNG_CONST png_byte bit_depth, - PNG_CONST int interlace_type, PNG_CONST double file_gamma, - PNG_CONST double screen_gamma, PNG_CONST png_byte sbit, PNG_CONST int speed, - PNG_CONST int use_input_precision, PNG_CONST int strip16) -{ - size_t pos = 0; - char name[64]; - - if (sbit != bit_depth) - { - pos = safecat(name, sizeof name, pos, "sbit("); - pos = safecatn(name, sizeof name, pos, sbit); - pos = safecat(name, sizeof name, pos, ") "); - } - - else - pos = safecat(name, sizeof name, pos, "gamma "); - - if (strip16) - pos = safecat(name, sizeof name, pos, "16to8 "); - - pos = safecatd(name, sizeof name, pos, file_gamma, 3); - pos = safecat(name, sizeof name, pos, "->"); - pos = safecatd(name, sizeof name, pos, screen_gamma, 3); - - gamma_test(pm, colour_type, bit_depth, interlace_type, file_gamma, - screen_gamma, sbit, 0, name, speed, use_input_precision, strip16); -} - -static void perform_gamma_transform_tests(png_modifier *pm, int speed) -{ - png_byte colour_type = 0; - png_byte bit_depth = 0; - - /* Ignore palette images - the gamma correction happens on the palette entry, - * haven't got the tests for this yet. - */ - while (next_format(&colour_type, &bit_depth)) if (colour_type != 3) - { - unsigned int i, j; - - for (i=0; ingammas; ++i) for (j=0; jngammas; ++j) if (i != j) - { - gamma_transform_test(pm, colour_type, bit_depth, pm->interlace_type, - 1/pm->gammas[i], pm->gammas[j], bit_depth, speed, - pm->use_input_precision, 0 /*do not strip16*/); - - if (fail(pm)) - return; - } - } -} - -static void perform_gamma_sbit_tests(png_modifier *pm, int speed) -{ - png_byte sbit; - - /* The only interesting cases are colour and grayscale, alpha is ignored here - * for overall speed. Only bit depths 8 and 16 are tested. - */ - for (sbit=pm->sbitlow; sbit<(1<ngammas; ++i) - { - for (j=0; jngammas; ++j) - { - if (i != j) - { - if (sbit < 8) - { - gamma_transform_test(pm, 0, 8, pm->interlace_type, - 1/pm->gammas[i], pm->gammas[j], sbit, speed, - pm->use_input_precision_sbit, 0 /*strip16*/); - - if (fail(pm)) - return; - - gamma_transform_test(pm, 2, 8, pm->interlace_type, - 1/pm->gammas[i], pm->gammas[j], sbit, speed, - pm->use_input_precision_sbit, 0 /*strip16*/); - - if (fail(pm)) - return; - } - -#ifdef DO_16BIT - gamma_transform_test(pm, 0, 16, pm->interlace_type, - 1/pm->gammas[i], pm->gammas[j], sbit, speed, - pm->use_input_precision_sbit, 0 /*strip16*/); - - if (fail(pm)) - return; - - gamma_transform_test(pm, 2, 16, pm->interlace_type, - 1/pm->gammas[i], pm->gammas[j], sbit, speed, - pm->use_input_precision_sbit, 0 /*strip16*/); - - if (fail(pm)) - return; -#endif - } - } - } - } -} - -/* Note that this requires a 16 bit source image but produces 8 bit output, so - * we only need the 16bit write support. - */ -#ifdef PNG_READ_16_TO_8_SUPPORTED -static void perform_gamma_strip16_tests(png_modifier *pm, int speed) -{ -# ifndef PNG_MAX_GAMMA_8 -# define PNG_MAX_GAMMA_8 11 -# endif - /* Include the alpha cases here. Note that sbit matches the internal value - * used by the library - otherwise we will get spurious errors from the - * internal sbit style approximation. - * - * The threshold test is here because otherwise the 16 to 8 conversion will - * proceed *without* gamma correction, and the tests above will fail (but not - * by much) - this could be fixed, it only appears with the -g option. - */ - unsigned int i, j; - for (i=0; ingammas; ++i) - { - for (j=0; jngammas; ++j) - { - if (i != j && - fabs(pm->gammas[j]/pm->gammas[i]-1) >= PNG_GAMMA_THRESHOLD) - { - gamma_transform_test(pm, 0, 16, pm->interlace_type, 1/pm->gammas[i], - pm->gammas[j], PNG_MAX_GAMMA_8, speed, - pm->use_input_precision_16to8, 1 /*strip16*/); - - if (fail(pm)) - return; - - gamma_transform_test(pm, 2, 16, pm->interlace_type, 1/pm->gammas[i], - pm->gammas[j], PNG_MAX_GAMMA_8, speed, - pm->use_input_precision_16to8, 1 /*strip16*/); - - if (fail(pm)) - return; - - gamma_transform_test(pm, 4, 16, pm->interlace_type, 1/pm->gammas[i], - pm->gammas[j], PNG_MAX_GAMMA_8, speed, - pm->use_input_precision_16to8, 1 /*strip16*/); - - if (fail(pm)) - return; - - gamma_transform_test(pm, 6, 16, pm->interlace_type, 1/pm->gammas[i], - pm->gammas[j], PNG_MAX_GAMMA_8, speed, - pm->use_input_precision_16to8, 1 /*strip16*/); - - if (fail(pm)) - return; - } - } - } -} -#endif /* 16 to 8 bit conversion */ - -static void -perform_gamma_test(png_modifier *pm, int speed, int summary) -{ - /* First some arbitrary no-transform tests: */ - if (!speed && pm->test_gamma_threshold) - { - perform_gamma_threshold_tests(pm); - - if (fail(pm)) - return; - } - - /* Now some real transforms. */ - if (pm->test_gamma_transform) - { - perform_gamma_transform_tests(pm, speed); - - if (summary) - { - printf("Gamma correction error summary\n\n"); - printf("The printed value is the maximum error in the pixel values\n"); - printf("calculated by the libpng gamma correction code. The error\n"); - printf("is calculated as the difference between the output pixel\n"); - printf("value (always an integer) and the ideal value from the\n"); - printf("libpng specification (typically not an integer).\n\n"); - - printf("Expect this value to be less than .5 for 8 bit formats,\n"); - printf("less than 1 for formats with fewer than 8 bits and a small\n"); - printf("number (typically less than 5) for the 16 bit formats.\n"); - printf("For performance reasons the value for 16 bit formats\n"); - printf("increases when the image file includes an sBIT chunk.\n\n"); - - printf(" 2 bit gray: %.5f\n", pm->error_gray_2); - printf(" 4 bit gray: %.5f\n", pm->error_gray_4); - printf(" 8 bit gray: %.5f\n", pm->error_gray_8); - printf(" 8 bit color: %.5f\n", pm->error_color_8); -#ifdef DO_16BIT - printf(" 16 bit gray: %.5f\n", pm->error_gray_16); - printf(" 16 bit color: %.5f\n", pm->error_color_16); -#endif - } - } - - /* The sbit tests produce much larger errors: */ - if (pm->test_gamma_sbit) - { - pm->error_gray_2 = pm->error_gray_4 = pm->error_gray_8 = - pm->error_gray_16 = pm->error_color_8 = pm->error_color_16 = 0; - perform_gamma_sbit_tests(pm, speed); - - if (summary) - { - printf("Gamma correction with sBIT:\n"); - - if (pm->sbitlow < 8U) - { - printf(" 2 bit gray: %.5f\n", pm->error_gray_2); - printf(" 4 bit gray: %.5f\n", pm->error_gray_4); - printf(" 8 bit gray: %.5f\n", pm->error_gray_8); - printf(" 8 bit color: %.5f\n", pm->error_color_8); - } - - #ifdef DO_16BIT - printf(" 16 bit gray: %.5f\n", pm->error_gray_16); - printf(" 16 bit color: %.5f\n", pm->error_color_16); - #endif - } - } - -#ifdef PNG_READ_16_TO_8_SUPPORTED - if (pm->test_gamma_strip16) - { - /* The 16 to 8 bit strip operations: */ - pm->error_gray_2 = pm->error_gray_4 = pm->error_gray_8 = - pm->error_gray_16 = pm->error_color_8 = pm->error_color_16 = 0; - perform_gamma_strip16_tests(pm, speed); - - if (summary) - { - printf("Gamma correction with 16 to 8 bit reduction:\n"); - printf(" 16 bit gray: %.5f\n", pm->error_gray_16); - printf(" 16 bit color: %.5f\n", pm->error_color_16); - } - } -#endif -} - -/* INTERLACE MACRO VALIDATION */ -/* This is copied verbatim from the specification, it is simply the pass - * number in which each pixel in each 8x8 tile appears. The array must - * be indexed adam7[y][x] and notice that the pass numbers are based at - * 1, not 0 - the base libpng uses. - */ -static PNG_CONST -png_byte adam7[8][8] = -{ - { 1,6,4,6,2,6,4,6 }, - { 7,7,7,7,7,7,7,7 }, - { 5,6,5,6,5,6,5,6 }, - { 7,7,7,7,7,7,7,7 }, - { 3,6,4,6,3,6,4,6 }, - { 7,7,7,7,7,7,7,7 }, - { 5,6,5,6,5,6,5,6 }, - { 7,7,7,7,7,7,7,7 } -}; - -/* This routine validates all the interlace support macros in png.h for - * a variety of valid PNG widths and heights. It uses a number of similarly - * named internal routines that feed off the above array. - */ -static png_uint_32 -png_pass_start_row(int pass) -{ - int x, y; - ++pass; - for (y=0; y<8; ++y) for (x=0; x<8; ++x) if (adam7[y][x] == pass) - return y; - return 0xf; -} - -static png_uint_32 -png_pass_start_col(int pass) -{ - int x, y; - ++pass; - for (x=0; x<8; ++x) for (y=0; y<8; ++y) if (adam7[y][x] == pass) - return x; - return 0xf; -} - -static int -png_pass_row_shift(int pass) -{ - int x, y, base=(-1), inc=8; - ++pass; - for (y=0; y<8; ++y) for (x=0; x<8; ++x) if (adam7[y][x] == pass) - { - if (base == (-1)) - base = y; - else if (base == y) - {} - else if (inc == y-base) - base=y; - else if (inc == 8) - inc = y-base, base=y; - else if (inc != y-base) - return 0xff; /* error - more than one 'inc' value! */ - } - - if (base == (-1)) return 0xfe; /* error - no row in pass! */ - - /* The shift is always 1, 2 or 3 - no pass has all the rows! */ - switch (inc) - { -case 2: return 1; -case 4: return 2; -case 8: return 3; -default: break; - } - - /* error - unrecognized 'inc' */ - return (inc << 8) + 0xfd; -} - -static int -png_pass_col_shift(int pass) -{ - int x, y, base=(-1), inc=8; - ++pass; - for (x=0; x<8; ++x) for (y=0; y<8; ++y) if (adam7[y][x] == pass) - { - if (base == (-1)) - base = x; - else if (base == x) - {} - else if (inc == x-base) - base=x; - else if (inc == 8) - inc = x-base, base=x; - else if (inc != x-base) - return 0xff; /* error - more than one 'inc' value! */ - } - - if (base == (-1)) return 0xfe; /* error - no row in pass! */ - - /* The shift is always 1, 2 or 3 - no pass has all the rows! */ - switch (inc) - { -case 1: return 0; /* pass 7 has all the columns */ -case 2: return 1; -case 4: return 2; -case 8: return 3; -default: break; - } - - /* error - unrecognized 'inc' */ - return (inc << 8) + 0xfd; -} - -static png_uint_32 -png_row_from_pass_row(png_uint_32 yIn, int pass) -{ - /* By examination of the array: */ - switch (pass) - { -case 0: return yIn * 8; -case 1: return yIn * 8; -case 2: return yIn * 8 + 4; -case 3: return yIn * 4; -case 4: return yIn * 4 + 2; -case 5: return yIn * 2; -case 6: return yIn * 2 + 1; -default: break; - } - - return 0xff; /* bad pass number */ -} - -static png_uint_32 -png_col_from_pass_col(png_uint_32 xIn, int pass) -{ - /* By examination of the array: */ - switch (pass) - { -case 0: return xIn * 8; -case 1: return xIn * 8 + 4; -case 2: return xIn * 4; -case 3: return xIn * 4 + 2; -case 4: return xIn * 2; -case 5: return xIn * 2 + 1; -case 6: return xIn; -default: break; - } - - return 0xff; /* bad pass number */ -} - -static int -png_row_in_interlace_pass(png_uint_32 y, int pass) -{ - /* Is row 'y' in pass 'pass'? */ - int x; - y &= 7; - ++pass; - for (x=0; x<8; ++x) if (adam7[y][x] == pass) - return 1; - - return 0; -} - -static int -png_col_in_interlace_pass(png_uint_32 x, int pass) -{ - /* Is column 'x' in pass 'pass'? */ - int y; - x &= 7; - ++pass; - for (y=0; y<8; ++y) if (adam7[y][x] == pass) - return 1; - - return 0; -} - -static png_uint_32 -png_pass_rows(png_uint_32 height, int pass) -{ - png_uint_32 tiles = height>>3; - png_uint_32 rows = 0; - unsigned int x, y; - - height &= 7; - ++pass; - for (y=0; y<8; ++y) for (x=0; x<8; ++x) if (adam7[y][x] == pass) - { - rows += tiles; - if (y < height) ++rows; - break; /* i.e. break the 'x', column, loop. */ - } - - return rows; -} - -static png_uint_32 -png_pass_cols(png_uint_32 width, int pass) -{ - png_uint_32 tiles = width>>3; - png_uint_32 cols = 0; - unsigned int x, y; - - width &= 7; - ++pass; - for (x=0; x<8; ++x) for (y=0; y<8; ++y) if (adam7[y][x] == pass) - { - cols += tiles; - if (x < width) ++cols; - break; /* i.e. break the 'y', row, loop. */ - } - - return cols; -} - -static void -perform_interlace_macro_validation(void) -{ - /* The macros to validate, first those that depend only on pass: - * - * PNG_PASS_START_ROW(pass) - * PNG_PASS_START_COL(pass) - * PNG_PASS_ROW_SHIFT(pass) - * PNG_PASS_COL_SHIFT(pass) - */ - int pass; - - for (pass=0; pass<7; ++pass) - { - png_uint_32 m, f, v; - - m = PNG_PASS_START_ROW(pass); - f = png_pass_start_row(pass); - if (m != f) - { - fprintf(stderr, "PNG_PASS_START_ROW(%d) = %u != %x\n", pass, m, f); - exit(1); - } - - m = PNG_PASS_START_COL(pass); - f = png_pass_start_col(pass); - if (m != f) - { - fprintf(stderr, "PNG_PASS_START_COL(%d) = %u != %x\n", pass, m, f); - exit(1); - } - - m = PNG_PASS_ROW_SHIFT(pass); - f = png_pass_row_shift(pass); - if (m != f) - { - fprintf(stderr, "PNG_PASS_ROW_SHIFT(%d) = %u != %x\n", pass, m, f); - exit(1); - } - - m = PNG_PASS_COL_SHIFT(pass); - f = png_pass_col_shift(pass); - if (m != f) - { - fprintf(stderr, "PNG_PASS_COL_SHIFT(%d) = %u != %x\n", pass, m, f); - exit(1); - } - - /* Macros that depend on the image or sub-image height too: - * - * PNG_PASS_ROWS(height, pass) - * PNG_PASS_COLS(width, pass) - * PNG_ROW_FROM_PASS_ROW(yIn, pass) - * PNG_COL_FROM_PASS_COL(xIn, pass) - * PNG_ROW_IN_INTERLACE_PASS(y, pass) - * PNG_COL_IN_INTERLACE_PASS(x, pass) - */ - for (v=0;;) - { - /* First the base 0 stuff: */ - m = PNG_ROW_FROM_PASS_ROW(v, pass); - f = png_row_from_pass_row(v, pass); - if (m != f) - { - fprintf(stderr, "PNG_ROW_FROM_PASS_ROW(%u, %d) = %u != %x\n", - v, pass, m, f); - exit(1); - } - - m = PNG_COL_FROM_PASS_COL(v, pass); - f = png_col_from_pass_col(v, pass); - if (m != f) - { - fprintf(stderr, "PNG_COL_FROM_PASS_COL(%u, %d) = %u != %x\n", - v, pass, m, f); - exit(1); - } - - m = PNG_ROW_IN_INTERLACE_PASS(v, pass); - f = png_row_in_interlace_pass(v, pass); - if (m != f) - { - fprintf(stderr, "PNG_ROW_IN_INTERLACE_PASS(%u, %d) = %u != %x\n", - v, pass, m, f); - exit(1); - } - - m = PNG_COL_IN_INTERLACE_PASS(v, pass); - f = png_col_in_interlace_pass(v, pass); - if (m != f) - { - fprintf(stderr, "PNG_COL_IN_INTERLACE_PASS(%u, %d) = %u != %x\n", - v, pass, m, f); - exit(1); - } - - /* Then the base 1 stuff: */ - ++v; - m = PNG_PASS_ROWS(v, pass); - f = png_pass_rows(v, pass); - if (m != f) - { - fprintf(stderr, "PNG_PASS_ROWS(%u, %d) = %u != %x\n", - v, pass, m, f); - exit(1); - } - - m = PNG_PASS_COLS(v, pass); - f = png_pass_cols(v, pass); - if (m != f) - { - fprintf(stderr, "PNG_PASS_COLS(%u, %d) = %u != %x\n", - v, pass, m, f); - exit(1); - } - - /* Move to the next v - the stepping algorithm starts skipping - * values above 1024. - */ - if (v > 1024) - { - if (v == PNG_UINT_31_MAX) - break; - - v = (v << 1) ^ v; - if (v >= PNG_UINT_31_MAX) - v = PNG_UINT_31_MAX-1; - } - } - } -} - -/* main program */ -int main(int argc, PNG_CONST char **argv) -{ - volatile int summary = 1; /* Print the error summary at the end */ - - /* Create the given output file on success: */ - PNG_CONST char *volatile touch = NULL; - - /* This is an array of standard gamma values (believe it or not I've seen - * every one of these mentioned somewhere.) - * - * In the following list the most useful values are first! - */ - static double - gammas[]={2.2, 1.0, 2.2/1.45, 1.8, 1.5, 2.4, 2.5, 2.62, 2.9}; - - png_modifier pm; - context(&pm.this, fault); - - modifier_init(&pm); - - /* Preallocate the image buffer, because we know how big it needs to be, - * note that, for testing purposes, it is deliberately mis-aligned. - */ - pm.this.image = malloc(2*TRANSFORM_IMAGEMAX+1); - - if (pm.this.image != NULL) - { - /* Ignore OOM at this point - the 'ensure' routine above will allocate - * the array appropriately. - */ - ++(pm.this.image); - pm.this.cb_image = 2*TRANSFORM_IMAGEMAX; - } - - /* Default to error on warning: */ - pm.this.treat_warnings_as_errors = 1; - - /* Store the test gammas */ - pm.gammas = gammas; - pm.ngammas = 0; /* default to off */ - pm.sbitlow = 8U; /* because libpng doesn't do sBIT below 8! */ - pm.use_input_precision_16to8 = 1U; /* Because of the way libpng does it */ - - /* Some default values (set the behavior for 'make check' here). - * These values simply control the maximum error permitted in the gamma - * transformations. The practial limits for human perception are described - * below (the setting for maxpc16), however for 8 bit encodings it isn't - * possible to meet the accepted capabilities of human vision - i.e. 8 bit - * images can never be good enough, regardless of encoding. - */ - pm.maxout8 = .1; /* Arithmetic error in *encoded* value */ - pm.maxabs8 = .00005; /* 1/20000 */ - pm.maxpc8 = .499; /* I.e., .499% fractional error */ - pm.maxout16 = .499; /* Error in *encoded* value */ - pm.maxabs16 = .00005;/* 1/20000 */ - - /* NOTE: this is a reasonable perceptual limit. We assume that humans can - * perceive light level differences of 1% over a 100:1 range, so we need to - * maintain 1 in 10000 accuracy (in linear light space), which is what the - * following guarantees. It also allows significantly higher errors at - * higher 16 bit values, which is important for performance. The actual - * maximum 16 bit error is about +/-1.9 in the fixed point implementation but - * this is only allowed for values >38149 by the following: - */ - pm.maxpc16 = .005; /* I.e., 1/200% - 1/20000 */ - - /* Now parse the command line options. */ - while (--argc >= 1) - { - if (strcmp(*++argv, "-v") == 0) - pm.this.verbose = 1; - - else if (strcmp(*argv, "-l") == 0) - pm.log = 1; - - else if (strcmp(*argv, "-q") == 0) - summary = pm.this.verbose = pm.log = 0; - - else if (strcmp(*argv, "-w") == 0) - pm.this.treat_warnings_as_errors = 0; - - else if (strcmp(*argv, "--speed") == 0) - pm.this.speed = 1, pm.ngammas = (sizeof gammas)/(sizeof gammas[0]), - pm.test_standard = 0; - - else if (strcmp(*argv, "--size") == 0) - pm.test_size = 1; - - else if (strcmp(*argv, "--nosize") == 0) - pm.test_size = 0; - - else if (strcmp(*argv, "--standard") == 0) - pm.test_standard = 1; - - else if (strcmp(*argv, "--nostandard") == 0) - pm.test_standard = 0; - - else if (strcmp(*argv, "--transform") == 0) - pm.test_transform = 1; - - else if (strcmp(*argv, "--notransform") == 0) - pm.test_transform = 0; - - else if (strncmp(*argv, "--transform-disable=", - sizeof "--transform-disable") == 0) - { - pm.test_transform = 1; - transform_disable(*argv + sizeof "--transform-disable"); - } - - else if (strncmp(*argv, "--transform-enable=", - sizeof "--transform-enable") == 0) - { - pm.test_transform = 1; - transform_enable(*argv + sizeof "--transform-enable"); - } - - else if (strcmp(*argv, "--gamma") == 0) - { - /* Just do two gamma tests here (2.2 and linear) for speed: */ - pm.ngammas = 2U; - pm.test_gamma_threshold = 1; - pm.test_gamma_transform = 1; - pm.test_gamma_sbit = 1; - pm.test_gamma_strip16 = 1; - } - - else if (strcmp(*argv, "--nogamma") == 0) - pm.ngammas = 0; - - else if (strcmp(*argv, "--gamma-threshold") == 0) - pm.ngammas = 2U, pm.test_gamma_threshold = 1; - - else if (strcmp(*argv, "--nogamma-threshold") == 0) - pm.test_gamma_threshold = 0; - - else if (strcmp(*argv, "--gamma-transform") == 0) - pm.ngammas = 2U, pm.test_gamma_transform = 1; - - else if (strcmp(*argv, "--nogamma-transform") == 0) - pm.test_gamma_transform = 0; - - else if (strcmp(*argv, "--gamma-sbit") == 0) - pm.ngammas = 2U, pm.test_gamma_sbit = 1; - - else if (strcmp(*argv, "--nogamma-sbit") == 0) - pm.test_gamma_sbit = 0; - - else if (strcmp(*argv, "--gamma-16-to-8") == 0) - pm.ngammas = 2U, pm.test_gamma_strip16 = 1; - - else if (strcmp(*argv, "--nogamma-16-to-8") == 0) - pm.test_gamma_strip16 = 0; - - else if (strcmp(*argv, "--all-gammas") == 0) - pm.ngammas = (sizeof gammas)/(sizeof gammas[0]); - - else if (strcmp(*argv, "--progressive-read") == 0) - pm.this.progressive = 1; - - else if (strcmp(*argv, "--interlace") == 0) - pm.interlace_type = PNG_INTERLACE_ADAM7; - - else if (argc >= 1 && strcmp(*argv, "--sbitlow") == 0) - --argc, pm.sbitlow = (png_byte)atoi(*++argv); - - else if (argc >= 1 && strcmp(*argv, "--touch") == 0) - --argc, touch = *++argv; - - else if (argc >= 1 && strncmp(*argv, "--max", 4) == 0) - { - --argc; - - if (strcmp(4+*argv, "abs8") == 0) - pm.maxabs8 = atof(*++argv); - - else if (strcmp(4+*argv, "abs16") == 0) - pm.maxabs16 = atof(*++argv); - - else if (strcmp(4+*argv, "out8") == 0) - pm.maxout8 = atof(*++argv); - - else if (strcmp(4+*argv, "out16") == 0) - pm.maxout16 = atof(*++argv); - - else if (strcmp(4+*argv, "pc8") == 0) - pm.maxpc8 = atof(*++argv); - - else if (strcmp(4+*argv, "pc16") == 0) - pm.maxpc16 = atof(*++argv); - - else - { - fprintf(stderr, "pngvalid: %s: unknown 'max' option\n", *argv); - exit(1); - } - } - - else - { - fprintf(stderr, "pngvalid: %s: unknown argument\n", *argv); - exit(1); - } - } - - /* If pngvalid is run with no arguments default to a reasonable set of the - * tests. - */ - if (pm.test_standard == 0 && pm.test_size == 0 && pm.test_transform == 0 && - pm.ngammas == 0) - { - pm.test_standard = 1; - pm.test_size = 1; - pm.test_transform = 1; - pm.ngammas = 3U; - } - - if (pm.ngammas > 0 && - pm.test_gamma_threshold == 0 && pm.test_gamma_transform == 0 && - pm.test_gamma_sbit == 0 && pm.test_gamma_strip16 == 0) - { - pm.test_gamma_threshold = 1; - pm.test_gamma_transform = 1; - pm.test_gamma_sbit = 1; - pm.test_gamma_strip16 = 1; - } - - else if (pm.ngammas == 0) - { - /* Nothing to test so turn everything off: */ - pm.test_gamma_threshold = 0; - pm.test_gamma_transform = 0; - pm.test_gamma_sbit = 0; - pm.test_gamma_strip16 = 0; - } - - Try - { - /* Make useful base images */ - make_transform_images(&pm.this); - - /* Perform the standard and gamma tests. */ - if (pm.test_standard) - { - perform_interlace_macro_validation(); - perform_standard_test(&pm); - perform_error_test(&pm); - } - - /* Various oddly sized images: */ - if (pm.test_size) - { - make_size_images(&pm.this); - perform_size_test(&pm); - } - - /* Combinatorial transforms: */ - if (pm.test_transform) - perform_transform_test(&pm); - - if (pm.ngammas > 0) - perform_gamma_test(&pm, pm.this.speed != 0, - summary && !pm.this.speed); - } - - Catch(fault) - { - fprintf(stderr, "pngvalid: test aborted (probably failed in cleanup)\n"); - if (!pm.this.verbose) - { - if (pm.this.error[0] != 0) - fprintf(stderr, "pngvalid: first error: %s\n", pm.this.error); - - fprintf(stderr, "pngvalid: run with -v to see what happened\n"); - } - exit(1); - } - - if (summary && !pm.this.speed) - { - printf("Results using %s point arithmetic %s\n", -#if defined(PNG_FLOATING_ARITHMETIC_SUPPORTED) || PNG_LIBPNG_VER < 10500 - "floating", -#else - "fixed", -#endif - (pm.this.nerrors || (pm.this.treat_warnings_as_errors && - pm.this.nwarnings)) ? "(errors)" : (pm.this.nwarnings ? - "(warnings)" : "(no errors or warnings)") - ); - printf("Allocated memory statistics (in bytes):\n" - "\tread %lu maximum single, %lu peak, %lu total\n" - "\twrite %lu maximum single, %lu peak, %lu total\n", - (unsigned long)pm.this.read_memory_pool.max_max, - (unsigned long)pm.this.read_memory_pool.max_limit, - (unsigned long)pm.this.read_memory_pool.max_total, - (unsigned long)pm.this.write_memory_pool.max_max, - (unsigned long)pm.this.write_memory_pool.max_limit, - (unsigned long)pm.this.write_memory_pool.max_total); - } - - /* Do this here to provoke memory corruption errors in memory not directly - * allocated by libpng - not a complete test, but better than nothing. - */ - store_delete(&pm.this); - - /* Error exit if there are any errors, and maybe if there are any - * warnings. - */ - if (pm.this.nerrors || (pm.this.treat_warnings_as_errors && - pm.this.nwarnings)) - { - if (!pm.this.verbose) - fprintf(stderr, "pngvalid: %s\n", pm.this.error); - - fprintf(stderr, "pngvalid: %d errors, %d warnings\n", pm.this.nerrors, - pm.this.nwarnings); - - exit(1); - } - - /* Success case. */ - if (touch != NULL) - { - FILE *fsuccess = fopen(touch, "wt"); - - if (fsuccess != NULL) - { - int error = 0; - fprintf(fsuccess, "PNG validation succeeded\n"); - fflush(fsuccess); - error = ferror(fsuccess); - - if (fclose(fsuccess) || error) - { - fprintf(stderr, "%s: write failed\n", touch); - exit(1); - } - } - } - - return 0; -} diff --git a/extern/libpng/include/pngwrite.c b/extern/libpng/include/pngwrite.c deleted file mode 100644 index b587f1b999..0000000000 --- a/extern/libpng/include/pngwrite.c +++ /dev/null @@ -1,1667 +0,0 @@ - -/* pngwrite.c - general routines to write a PNG file - * - * Last changed in libpng 1.5.10 [March 8, 2012] - * Copyright (c) 1998-2012 Glenn Randers-Pehrson - * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) - * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) - * - * This code is released under the libpng license. - * For conditions of distribution and use, see the disclaimer - * and license in png.h - */ - -#include "pngpriv.h" - -#ifdef PNG_WRITE_SUPPORTED - -/* Writes all the PNG information. This is the suggested way to use the - * library. If you have a new chunk to add, make a function to write it, - * and put it in the correct location here. If you want the chunk written - * after the image data, put it in png_write_end(). I strongly encourage - * you to supply a PNG_INFO_ flag, and check info_ptr->valid before writing - * the chunk, as that will keep the code from breaking if you want to just - * write a plain PNG file. If you have long comments, I suggest writing - * them in png_write_end(), and compressing them. - */ -void PNGAPI -png_write_info_before_PLTE(png_structp png_ptr, png_infop info_ptr) -{ - png_debug(1, "in png_write_info_before_PLTE"); - - if (png_ptr == NULL || info_ptr == NULL) - return; - - if (!(png_ptr->mode & PNG_WROTE_INFO_BEFORE_PLTE)) - { - /* Write PNG signature */ - png_write_sig(png_ptr); - -#ifdef PNG_MNG_FEATURES_SUPPORTED - if ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) && \ - (png_ptr->mng_features_permitted)) - { - png_warning(png_ptr, "MNG features are not allowed in a PNG datastream"); - png_ptr->mng_features_permitted = 0; - } -#endif - - /* Write IHDR information. */ - png_write_IHDR(png_ptr, info_ptr->width, info_ptr->height, - info_ptr->bit_depth, info_ptr->color_type, info_ptr->compression_type, - info_ptr->filter_type, -#ifdef PNG_WRITE_INTERLACING_SUPPORTED - info_ptr->interlace_type); -#else - 0); -#endif - /* The rest of these check to see if the valid field has the appropriate - * flag set, and if it does, writes the chunk. - */ -#ifdef PNG_WRITE_gAMA_SUPPORTED - if (info_ptr->valid & PNG_INFO_gAMA) - png_write_gAMA_fixed(png_ptr, info_ptr->gamma); -#endif -#ifdef PNG_WRITE_sRGB_SUPPORTED - if (info_ptr->valid & PNG_INFO_sRGB) - png_write_sRGB(png_ptr, (int)info_ptr->srgb_intent); -#endif - -#ifdef PNG_WRITE_iCCP_SUPPORTED - if (info_ptr->valid & PNG_INFO_iCCP) - png_write_iCCP(png_ptr, info_ptr->iccp_name, PNG_COMPRESSION_TYPE_BASE, - (png_charp)info_ptr->iccp_profile, (int)info_ptr->iccp_proflen); -#endif -#ifdef PNG_WRITE_sBIT_SUPPORTED - if (info_ptr->valid & PNG_INFO_sBIT) - png_write_sBIT(png_ptr, &(info_ptr->sig_bit), info_ptr->color_type); -#endif -#ifdef PNG_WRITE_cHRM_SUPPORTED - if (info_ptr->valid & PNG_INFO_cHRM) - png_write_cHRM_fixed(png_ptr, - info_ptr->x_white, info_ptr->y_white, - info_ptr->x_red, info_ptr->y_red, - info_ptr->x_green, info_ptr->y_green, - info_ptr->x_blue, info_ptr->y_blue); -#endif - -#ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED - if (info_ptr->unknown_chunks_num) - { - png_unknown_chunk *up; - - png_debug(5, "writing extra chunks"); - - for (up = info_ptr->unknown_chunks; - up < info_ptr->unknown_chunks + info_ptr->unknown_chunks_num; - up++) - { - int keep = png_handle_as_unknown(png_ptr, up->name); - - if (keep != PNG_HANDLE_CHUNK_NEVER && - up->location && - !(up->location & PNG_HAVE_PLTE) && - !(up->location & PNG_HAVE_IDAT) && - !(up->location & PNG_AFTER_IDAT) && - ((up->name[3] & 0x20) || keep == PNG_HANDLE_CHUNK_ALWAYS || - (png_ptr->flags & PNG_FLAG_KEEP_UNSAFE_CHUNKS))) - { - if (up->size == 0) - png_warning(png_ptr, "Writing zero-length unknown chunk"); - - png_write_chunk(png_ptr, up->name, up->data, up->size); - } - } - } -#endif - png_ptr->mode |= PNG_WROTE_INFO_BEFORE_PLTE; - } -} - -void PNGAPI -png_write_info(png_structp png_ptr, png_infop info_ptr) -{ -#if defined(PNG_WRITE_TEXT_SUPPORTED) || defined(PNG_WRITE_sPLT_SUPPORTED) - int i; -#endif - - png_debug(1, "in png_write_info"); - - if (png_ptr == NULL || info_ptr == NULL) - return; - - png_write_info_before_PLTE(png_ptr, info_ptr); - - if (info_ptr->valid & PNG_INFO_PLTE) - png_write_PLTE(png_ptr, info_ptr->palette, - (png_uint_32)info_ptr->num_palette); - - else if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) - png_error(png_ptr, "Valid palette required for paletted images"); - -#ifdef PNG_WRITE_tRNS_SUPPORTED - if (info_ptr->valid & PNG_INFO_tRNS) - { -#ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED - /* Invert the alpha channel (in tRNS) */ - if ((png_ptr->transformations & PNG_INVERT_ALPHA) && - info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) - { - int j; - for (j = 0; j<(int)info_ptr->num_trans; j++) - info_ptr->trans_alpha[j] = - (png_byte)(255 - info_ptr->trans_alpha[j]); - } -#endif - png_write_tRNS(png_ptr, info_ptr->trans_alpha, &(info_ptr->trans_color), - info_ptr->num_trans, info_ptr->color_type); - } -#endif -#ifdef PNG_WRITE_bKGD_SUPPORTED - if (info_ptr->valid & PNG_INFO_bKGD) - png_write_bKGD(png_ptr, &(info_ptr->background), info_ptr->color_type); -#endif - -#ifdef PNG_WRITE_hIST_SUPPORTED - if (info_ptr->valid & PNG_INFO_hIST) - png_write_hIST(png_ptr, info_ptr->hist, info_ptr->num_palette); -#endif - -#ifdef PNG_WRITE_oFFs_SUPPORTED - if (info_ptr->valid & PNG_INFO_oFFs) - png_write_oFFs(png_ptr, info_ptr->x_offset, info_ptr->y_offset, - info_ptr->offset_unit_type); -#endif - -#ifdef PNG_WRITE_pCAL_SUPPORTED - if (info_ptr->valid & PNG_INFO_pCAL) - png_write_pCAL(png_ptr, info_ptr->pcal_purpose, info_ptr->pcal_X0, - info_ptr->pcal_X1, info_ptr->pcal_type, info_ptr->pcal_nparams, - info_ptr->pcal_units, info_ptr->pcal_params); -#endif - -#ifdef PNG_WRITE_sCAL_SUPPORTED - if (info_ptr->valid & PNG_INFO_sCAL) - png_write_sCAL_s(png_ptr, (int)info_ptr->scal_unit, - info_ptr->scal_s_width, info_ptr->scal_s_height); -#endif /* sCAL */ - -#ifdef PNG_WRITE_pHYs_SUPPORTED - if (info_ptr->valid & PNG_INFO_pHYs) - png_write_pHYs(png_ptr, info_ptr->x_pixels_per_unit, - info_ptr->y_pixels_per_unit, info_ptr->phys_unit_type); -#endif /* pHYs */ - -#ifdef PNG_WRITE_tIME_SUPPORTED - if (info_ptr->valid & PNG_INFO_tIME) - { - png_write_tIME(png_ptr, &(info_ptr->mod_time)); - png_ptr->mode |= PNG_WROTE_tIME; - } -#endif /* tIME */ - -#ifdef PNG_WRITE_sPLT_SUPPORTED - if (info_ptr->valid & PNG_INFO_sPLT) - for (i = 0; i < (int)info_ptr->splt_palettes_num; i++) - png_write_sPLT(png_ptr, info_ptr->splt_palettes + i); -#endif /* sPLT */ - -#ifdef PNG_WRITE_TEXT_SUPPORTED - /* Check to see if we need to write text chunks */ - for (i = 0; i < info_ptr->num_text; i++) - { - png_debug2(2, "Writing header text chunk %d, type %d", i, - info_ptr->text[i].compression); - /* An internationalized chunk? */ - if (info_ptr->text[i].compression > 0) - { -#ifdef PNG_WRITE_iTXt_SUPPORTED - /* Write international chunk */ - png_write_iTXt(png_ptr, - info_ptr->text[i].compression, - info_ptr->text[i].key, - info_ptr->text[i].lang, - info_ptr->text[i].lang_key, - info_ptr->text[i].text); -#else - png_warning(png_ptr, "Unable to write international text"); -#endif - /* Mark this chunk as written */ - info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR; - } - - /* If we want a compressed text chunk */ - else if (info_ptr->text[i].compression == PNG_TEXT_COMPRESSION_zTXt) - { -#ifdef PNG_WRITE_zTXt_SUPPORTED - /* Write compressed chunk */ - png_write_zTXt(png_ptr, info_ptr->text[i].key, - info_ptr->text[i].text, 0, - info_ptr->text[i].compression); -#else - png_warning(png_ptr, "Unable to write compressed text"); -#endif - /* Mark this chunk as written */ - info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_zTXt_WR; - } - - else if (info_ptr->text[i].compression == PNG_TEXT_COMPRESSION_NONE) - { -#ifdef PNG_WRITE_tEXt_SUPPORTED - /* Write uncompressed chunk */ - png_write_tEXt(png_ptr, info_ptr->text[i].key, - info_ptr->text[i].text, - 0); - /* Mark this chunk as written */ - info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR; -#else - /* Can't get here */ - png_warning(png_ptr, "Unable to write uncompressed text"); -#endif - } - } -#endif /* tEXt */ - -#ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED - if (info_ptr->unknown_chunks_num) - { - png_unknown_chunk *up; - - png_debug(5, "writing extra chunks"); - - for (up = info_ptr->unknown_chunks; - up < info_ptr->unknown_chunks + info_ptr->unknown_chunks_num; - up++) - { - int keep = png_handle_as_unknown(png_ptr, up->name); - if (keep != PNG_HANDLE_CHUNK_NEVER && - up->location && - (up->location & PNG_HAVE_PLTE) && - !(up->location & PNG_HAVE_IDAT) && - !(up->location & PNG_AFTER_IDAT) && - ((up->name[3] & 0x20) || keep == PNG_HANDLE_CHUNK_ALWAYS || - (png_ptr->flags & PNG_FLAG_KEEP_UNSAFE_CHUNKS))) - { - png_write_chunk(png_ptr, up->name, up->data, up->size); - } - } - } -#endif -} - -/* Writes the end of the PNG file. If you don't want to write comments or - * time information, you can pass NULL for info. If you already wrote these - * in png_write_info(), do not write them again here. If you have long - * comments, I suggest writing them here, and compressing them. - */ -void PNGAPI -png_write_end(png_structp png_ptr, png_infop info_ptr) -{ - png_debug(1, "in png_write_end"); - - if (png_ptr == NULL) - return; - - if (!(png_ptr->mode & PNG_HAVE_IDAT)) - png_error(png_ptr, "No IDATs written into file"); - -#ifdef PNG_WRITE_CHECK_FOR_INVALID_INDEX_SUPPORTED - if (png_ptr->num_palette_max > png_ptr->num_palette) - png_benign_error(png_ptr, "Wrote palette index exceeding num_palette"); -#endif - - /* See if user wants us to write information chunks */ - if (info_ptr != NULL) - { -#ifdef PNG_WRITE_TEXT_SUPPORTED - int i; /* local index variable */ -#endif -#ifdef PNG_WRITE_tIME_SUPPORTED - /* Check to see if user has supplied a time chunk */ - if ((info_ptr->valid & PNG_INFO_tIME) && - !(png_ptr->mode & PNG_WROTE_tIME)) - png_write_tIME(png_ptr, &(info_ptr->mod_time)); - -#endif -#ifdef PNG_WRITE_TEXT_SUPPORTED - /* Loop through comment chunks */ - for (i = 0; i < info_ptr->num_text; i++) - { - png_debug2(2, "Writing trailer text chunk %d, type %d", i, - info_ptr->text[i].compression); - /* An internationalized chunk? */ - if (info_ptr->text[i].compression > 0) - { -#ifdef PNG_WRITE_iTXt_SUPPORTED - /* Write international chunk */ - png_write_iTXt(png_ptr, - info_ptr->text[i].compression, - info_ptr->text[i].key, - info_ptr->text[i].lang, - info_ptr->text[i].lang_key, - info_ptr->text[i].text); -#else - png_warning(png_ptr, "Unable to write international text"); -#endif - /* Mark this chunk as written */ - info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR; - } - - else if (info_ptr->text[i].compression >= PNG_TEXT_COMPRESSION_zTXt) - { -#ifdef PNG_WRITE_zTXt_SUPPORTED - /* Write compressed chunk */ - png_write_zTXt(png_ptr, info_ptr->text[i].key, - info_ptr->text[i].text, 0, - info_ptr->text[i].compression); -#else - png_warning(png_ptr, "Unable to write compressed text"); -#endif - /* Mark this chunk as written */ - info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_zTXt_WR; - } - - else if (info_ptr->text[i].compression == PNG_TEXT_COMPRESSION_NONE) - { -#ifdef PNG_WRITE_tEXt_SUPPORTED - /* Write uncompressed chunk */ - png_write_tEXt(png_ptr, info_ptr->text[i].key, - info_ptr->text[i].text, 0); -#else - png_warning(png_ptr, "Unable to write uncompressed text"); -#endif - - /* Mark this chunk as written */ - info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR; - } - } -#endif -#ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED - if (info_ptr->unknown_chunks_num) - { - png_unknown_chunk *up; - - png_debug(5, "writing extra chunks"); - - for (up = info_ptr->unknown_chunks; - up < info_ptr->unknown_chunks + info_ptr->unknown_chunks_num; - up++) - { - int keep = png_handle_as_unknown(png_ptr, up->name); - if (keep != PNG_HANDLE_CHUNK_NEVER && - up->location && - (up->location & PNG_AFTER_IDAT) && - ((up->name[3] & 0x20) || keep == PNG_HANDLE_CHUNK_ALWAYS || - (png_ptr->flags & PNG_FLAG_KEEP_UNSAFE_CHUNKS))) - { - png_write_chunk(png_ptr, up->name, up->data, up->size); - } - } - } -#endif - } - - png_ptr->mode |= PNG_AFTER_IDAT; - - /* Write end of PNG file */ - png_write_IEND(png_ptr); - /* This flush, added in libpng-1.0.8, removed from libpng-1.0.9beta03, - * and restored again in libpng-1.2.30, may cause some applications that - * do not set png_ptr->output_flush_fn to crash. If your application - * experiences a problem, please try building libpng with - * PNG_WRITE_FLUSH_AFTER_IEND_SUPPORTED defined, and report the event to - * png-mng-implement at lists.sf.net . - */ -#ifdef PNG_WRITE_FLUSH_SUPPORTED -# ifdef PNG_WRITE_FLUSH_AFTER_IEND_SUPPORTED - png_flush(png_ptr); -# endif -#endif -} - -#ifdef PNG_CONVERT_tIME_SUPPORTED -/* "tm" structure is not supported on WindowsCE */ -void PNGAPI -png_convert_from_struct_tm(png_timep ptime, PNG_CONST struct tm FAR * ttime) -{ - png_debug(1, "in png_convert_from_struct_tm"); - - ptime->year = (png_uint_16)(1900 + ttime->tm_year); - ptime->month = (png_byte)(ttime->tm_mon + 1); - ptime->day = (png_byte)ttime->tm_mday; - ptime->hour = (png_byte)ttime->tm_hour; - ptime->minute = (png_byte)ttime->tm_min; - ptime->second = (png_byte)ttime->tm_sec; -} - -void PNGAPI -png_convert_from_time_t(png_timep ptime, time_t ttime) -{ - struct tm *tbuf; - - png_debug(1, "in png_convert_from_time_t"); - - tbuf = gmtime(&ttime); - png_convert_from_struct_tm(ptime, tbuf); -} -#endif - -/* Initialize png_ptr structure, and allocate any memory needed */ -PNG_FUNCTION(png_structp,PNGAPI -png_create_write_struct,(png_const_charp user_png_ver, png_voidp error_ptr, - png_error_ptr error_fn, png_error_ptr warn_fn),PNG_ALLOCATED) -{ -#ifdef PNG_USER_MEM_SUPPORTED - return (png_create_write_struct_2(user_png_ver, error_ptr, error_fn, - warn_fn, NULL, NULL, NULL)); -} - -/* Alternate initialize png_ptr structure, and allocate any memory needed */ -static void png_reset_filter_heuristics(png_structp png_ptr); /* forward decl */ - -PNG_FUNCTION(png_structp,PNGAPI -png_create_write_struct_2,(png_const_charp user_png_ver, png_voidp error_ptr, - png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr, - png_malloc_ptr malloc_fn, png_free_ptr free_fn),PNG_ALLOCATED) -{ -#endif /* PNG_USER_MEM_SUPPORTED */ - volatile int png_cleanup_needed = 0; -#ifdef PNG_SETJMP_SUPPORTED - volatile -#endif - png_structp png_ptr; -#ifdef PNG_SETJMP_SUPPORTED -#ifdef USE_FAR_KEYWORD - jmp_buf tmp_jmpbuf; -#endif -#endif - - png_debug(1, "in png_create_write_struct"); - -#ifdef PNG_USER_MEM_SUPPORTED - png_ptr = (png_structp)png_create_struct_2(PNG_STRUCT_PNG, - (png_malloc_ptr)malloc_fn, (png_voidp)mem_ptr); -#else - png_ptr = (png_structp)png_create_struct(PNG_STRUCT_PNG); -#endif /* PNG_USER_MEM_SUPPORTED */ - if (png_ptr == NULL) - return (NULL); - - /* Added at libpng-1.2.6 */ -#ifdef PNG_SET_USER_LIMITS_SUPPORTED - png_ptr->user_width_max = PNG_USER_WIDTH_MAX; - png_ptr->user_height_max = PNG_USER_HEIGHT_MAX; -#endif - -#ifdef PNG_SETJMP_SUPPORTED -/* Applications that neglect to set up their own setjmp() and then - * encounter a png_error() will longjmp here. Since the jmpbuf is - * then meaningless we abort instead of returning. - */ -#ifdef USE_FAR_KEYWORD - if (setjmp(tmp_jmpbuf)) -#else - if (setjmp(png_jmpbuf(png_ptr))) /* sets longjmp to match setjmp */ -#endif -#ifdef USE_FAR_KEYWORD - png_memcpy(png_jmpbuf(png_ptr), tmp_jmpbuf, png_sizeof(jmp_buf)); -#endif - PNG_ABORT(); -#endif - -#ifdef PNG_USER_MEM_SUPPORTED - png_set_mem_fn(png_ptr, mem_ptr, malloc_fn, free_fn); -#endif /* PNG_USER_MEM_SUPPORTED */ - png_set_error_fn(png_ptr, error_ptr, error_fn, warn_fn); - - if (!png_user_version_check(png_ptr, user_png_ver)) - png_cleanup_needed = 1; - - /* Initialize zbuf - compression buffer */ - png_ptr->zbuf_size = PNG_ZBUF_SIZE; - - if (!png_cleanup_needed) - { - png_ptr->zbuf = (png_bytep)png_malloc_warn(png_ptr, - png_ptr->zbuf_size); - if (png_ptr->zbuf == NULL) - png_cleanup_needed = 1; - } - - if (png_cleanup_needed) - { - /* Clean up PNG structure and deallocate any memory. */ - png_free(png_ptr, png_ptr->zbuf); - png_ptr->zbuf = NULL; -#ifdef PNG_USER_MEM_SUPPORTED - png_destroy_struct_2((png_voidp)png_ptr, - (png_free_ptr)free_fn, (png_voidp)mem_ptr); -#else - png_destroy_struct((png_voidp)png_ptr); -#endif - return (NULL); - } - - png_set_write_fn(png_ptr, NULL, NULL, NULL); - -#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED - png_reset_filter_heuristics(png_ptr); -#endif - - return (png_ptr); -} - - -/* Write a few rows of image data. If the image is interlaced, - * either you will have to write the 7 sub images, or, if you - * have called png_set_interlace_handling(), you will have to - * "write" the image seven times. - */ -void PNGAPI -png_write_rows(png_structp png_ptr, png_bytepp row, - png_uint_32 num_rows) -{ - png_uint_32 i; /* row counter */ - png_bytepp rp; /* row pointer */ - - png_debug(1, "in png_write_rows"); - - if (png_ptr == NULL) - return; - - /* Loop through the rows */ - for (i = 0, rp = row; i < num_rows; i++, rp++) - { - png_write_row(png_ptr, *rp); - } -} - -/* Write the image. You only need to call this function once, even - * if you are writing an interlaced image. - */ -void PNGAPI -png_write_image(png_structp png_ptr, png_bytepp image) -{ - png_uint_32 i; /* row index */ - int pass, num_pass; /* pass variables */ - png_bytepp rp; /* points to current row */ - - if (png_ptr == NULL) - return; - - png_debug(1, "in png_write_image"); - -#ifdef PNG_WRITE_INTERLACING_SUPPORTED - /* Initialize interlace handling. If image is not interlaced, - * this will set pass to 1 - */ - num_pass = png_set_interlace_handling(png_ptr); -#else - num_pass = 1; -#endif - /* Loop through passes */ - for (pass = 0; pass < num_pass; pass++) - { - /* Loop through image */ - for (i = 0, rp = image; i < png_ptr->height; i++, rp++) - { - png_write_row(png_ptr, *rp); - } - } -} - -/* Called by user to write a row of image data */ -void PNGAPI -png_write_row(png_structp png_ptr, png_const_bytep row) -{ - /* 1.5.6: moved from png_struct to be a local structure: */ - png_row_info row_info; - - if (png_ptr == NULL) - return; - - png_debug2(1, "in png_write_row (row %u, pass %d)", - png_ptr->row_number, png_ptr->pass); - - /* Initialize transformations and other stuff if first time */ - if (png_ptr->row_number == 0 && png_ptr->pass == 0) - { - /* Make sure we wrote the header info */ - if (!(png_ptr->mode & PNG_WROTE_INFO_BEFORE_PLTE)) - png_error(png_ptr, - "png_write_info was never called before png_write_row"); - - /* Check for transforms that have been set but were defined out */ -#if !defined(PNG_WRITE_INVERT_SUPPORTED) && defined(PNG_READ_INVERT_SUPPORTED) - if (png_ptr->transformations & PNG_INVERT_MONO) - png_warning(png_ptr, "PNG_WRITE_INVERT_SUPPORTED is not defined"); -#endif - -#if !defined(PNG_WRITE_FILLER_SUPPORTED) && defined(PNG_READ_FILLER_SUPPORTED) - if (png_ptr->transformations & PNG_FILLER) - png_warning(png_ptr, "PNG_WRITE_FILLER_SUPPORTED is not defined"); -#endif -#if !defined(PNG_WRITE_PACKSWAP_SUPPORTED) && \ - defined(PNG_READ_PACKSWAP_SUPPORTED) - if (png_ptr->transformations & PNG_PACKSWAP) - png_warning(png_ptr, - "PNG_WRITE_PACKSWAP_SUPPORTED is not defined"); -#endif - -#if !defined(PNG_WRITE_PACK_SUPPORTED) && defined(PNG_READ_PACK_SUPPORTED) - if (png_ptr->transformations & PNG_PACK) - png_warning(png_ptr, "PNG_WRITE_PACK_SUPPORTED is not defined"); -#endif - -#if !defined(PNG_WRITE_SHIFT_SUPPORTED) && defined(PNG_READ_SHIFT_SUPPORTED) - if (png_ptr->transformations & PNG_SHIFT) - png_warning(png_ptr, "PNG_WRITE_SHIFT_SUPPORTED is not defined"); -#endif - -#if !defined(PNG_WRITE_BGR_SUPPORTED) && defined(PNG_READ_BGR_SUPPORTED) - if (png_ptr->transformations & PNG_BGR) - png_warning(png_ptr, "PNG_WRITE_BGR_SUPPORTED is not defined"); -#endif - -#if !defined(PNG_WRITE_SWAP_SUPPORTED) && defined(PNG_READ_SWAP_SUPPORTED) - if (png_ptr->transformations & PNG_SWAP_BYTES) - png_warning(png_ptr, "PNG_WRITE_SWAP_SUPPORTED is not defined"); -#endif - - png_write_start_row(png_ptr); - } - -#ifdef PNG_WRITE_INTERLACING_SUPPORTED - /* If interlaced and not interested in row, return */ - if (png_ptr->interlaced && (png_ptr->transformations & PNG_INTERLACE)) - { - switch (png_ptr->pass) - { - case 0: - if (png_ptr->row_number & 0x07) - { - png_write_finish_row(png_ptr); - return; - } - break; - - case 1: - if ((png_ptr->row_number & 0x07) || png_ptr->width < 5) - { - png_write_finish_row(png_ptr); - return; - } - break; - - case 2: - if ((png_ptr->row_number & 0x07) != 4) - { - png_write_finish_row(png_ptr); - return; - } - break; - - case 3: - if ((png_ptr->row_number & 0x03) || png_ptr->width < 3) - { - png_write_finish_row(png_ptr); - return; - } - break; - - case 4: - if ((png_ptr->row_number & 0x03) != 2) - { - png_write_finish_row(png_ptr); - return; - } - break; - - case 5: - if ((png_ptr->row_number & 0x01) || png_ptr->width < 2) - { - png_write_finish_row(png_ptr); - return; - } - break; - - case 6: - if (!(png_ptr->row_number & 0x01)) - { - png_write_finish_row(png_ptr); - return; - } - break; - - default: /* error: ignore it */ - break; - } - } -#endif - - /* Set up row info for transformations */ - row_info.color_type = png_ptr->color_type; - row_info.width = png_ptr->usr_width; - row_info.channels = png_ptr->usr_channels; - row_info.bit_depth = png_ptr->usr_bit_depth; - row_info.pixel_depth = (png_byte)(row_info.bit_depth * row_info.channels); - row_info.rowbytes = PNG_ROWBYTES(row_info.pixel_depth, row_info.width); - - png_debug1(3, "row_info->color_type = %d", row_info.color_type); - png_debug1(3, "row_info->width = %u", row_info.width); - png_debug1(3, "row_info->channels = %d", row_info.channels); - png_debug1(3, "row_info->bit_depth = %d", row_info.bit_depth); - png_debug1(3, "row_info->pixel_depth = %d", row_info.pixel_depth); - png_debug1(3, "row_info->rowbytes = %lu", (unsigned long)row_info.rowbytes); - - /* Copy user's row into buffer, leaving room for filter byte. */ - png_memcpy(png_ptr->row_buf + 1, row, row_info.rowbytes); - -#ifdef PNG_WRITE_INTERLACING_SUPPORTED - /* Handle interlacing */ - if (png_ptr->interlaced && png_ptr->pass < 6 && - (png_ptr->transformations & PNG_INTERLACE)) - { - png_do_write_interlace(&row_info, png_ptr->row_buf + 1, png_ptr->pass); - /* This should always get caught above, but still ... */ - if (!(row_info.width)) - { - png_write_finish_row(png_ptr); - return; - } - } -#endif - -#ifdef PNG_WRITE_TRANSFORMS_SUPPORTED - /* Handle other transformations */ - if (png_ptr->transformations) - png_do_write_transformations(png_ptr, &row_info); -#endif - - /* At this point the row_info pixel depth must match the 'transformed' depth, - * which is also the output depth. - */ - if (row_info.pixel_depth != png_ptr->pixel_depth || - row_info.pixel_depth != png_ptr->transformed_pixel_depth) - png_error(png_ptr, "internal write transform logic error"); - -#ifdef PNG_MNG_FEATURES_SUPPORTED - /* Write filter_method 64 (intrapixel differencing) only if - * 1. Libpng was compiled with PNG_MNG_FEATURES_SUPPORTED and - * 2. Libpng did not write a PNG signature (this filter_method is only - * used in PNG datastreams that are embedded in MNG datastreams) and - * 3. The application called png_permit_mng_features with a mask that - * included PNG_FLAG_MNG_FILTER_64 and - * 4. The filter_method is 64 and - * 5. The color_type is RGB or RGBA - */ - if ((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) && - (png_ptr->filter_type == PNG_INTRAPIXEL_DIFFERENCING)) - { - /* Intrapixel differencing */ - png_do_write_intrapixel(&row_info, png_ptr->row_buf + 1); - } -#endif - -/* Added at libpng-1.5.10 */ -#ifdef PNG_WRITE_CHECK_FOR_INVALID_INDEX_SUPPORTED - /* Check for out-of-range palette index */ - if(row_info.color_type == PNG_COLOR_TYPE_PALETTE) - png_do_check_palette_indexes(png_ptr, &row_info); -#endif - - /* Find a filter if necessary, filter the row and write it out. */ - png_write_find_filter(png_ptr, &row_info); - - if (png_ptr->write_row_fn != NULL) - (*(png_ptr->write_row_fn))(png_ptr, png_ptr->row_number, png_ptr->pass); -} - -#ifdef PNG_WRITE_FLUSH_SUPPORTED -/* Set the automatic flush interval or 0 to turn flushing off */ -void PNGAPI -png_set_flush(png_structp png_ptr, int nrows) -{ - png_debug(1, "in png_set_flush"); - - if (png_ptr == NULL) - return; - - png_ptr->flush_dist = (nrows < 0 ? 0 : nrows); -} - -/* Flush the current output buffers now */ -void PNGAPI -png_write_flush(png_structp png_ptr) -{ - int wrote_IDAT; - - png_debug(1, "in png_write_flush"); - - if (png_ptr == NULL) - return; - - /* We have already written out all of the data */ - if (png_ptr->row_number >= png_ptr->num_rows) - return; - - do - { - int ret; - - /* Compress the data */ - ret = deflate(&png_ptr->zstream, Z_SYNC_FLUSH); - wrote_IDAT = 0; - - /* Check for compression errors */ - if (ret != Z_OK) - { - if (png_ptr->zstream.msg != NULL) - png_error(png_ptr, png_ptr->zstream.msg); - - else - png_error(png_ptr, "zlib error"); - } - - if (!(png_ptr->zstream.avail_out)) - { - /* Write the IDAT and reset the zlib output buffer */ - png_write_IDAT(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size); - wrote_IDAT = 1; - } - } while (wrote_IDAT == 1); - - /* If there is any data left to be output, write it into a new IDAT */ - if (png_ptr->zbuf_size != png_ptr->zstream.avail_out) - { - /* Write the IDAT and reset the zlib output buffer */ - png_write_IDAT(png_ptr, png_ptr->zbuf, - png_ptr->zbuf_size - png_ptr->zstream.avail_out); - } - png_ptr->flush_rows = 0; - png_flush(png_ptr); -} -#endif /* PNG_WRITE_FLUSH_SUPPORTED */ - -/* Free all memory used by the write */ -void PNGAPI -png_destroy_write_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr) -{ - png_structp png_ptr = NULL; - png_infop info_ptr = NULL; -#ifdef PNG_USER_MEM_SUPPORTED - png_free_ptr free_fn = NULL; - png_voidp mem_ptr = NULL; -#endif - - png_debug(1, "in png_destroy_write_struct"); - - if (png_ptr_ptr != NULL) - png_ptr = *png_ptr_ptr; - -#ifdef PNG_USER_MEM_SUPPORTED - if (png_ptr != NULL) - { - free_fn = png_ptr->free_fn; - mem_ptr = png_ptr->mem_ptr; - } -#endif - - if (info_ptr_ptr != NULL) - info_ptr = *info_ptr_ptr; - - if (info_ptr != NULL) - { - if (png_ptr != NULL) - { - png_free_data(png_ptr, info_ptr, PNG_FREE_ALL, -1); - -#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED - if (png_ptr->num_chunk_list) - { - png_free(png_ptr, png_ptr->chunk_list); - png_ptr->num_chunk_list = 0; - } -#endif - } - -#ifdef PNG_USER_MEM_SUPPORTED - png_destroy_struct_2((png_voidp)info_ptr, (png_free_ptr)free_fn, - (png_voidp)mem_ptr); -#else - png_destroy_struct((png_voidp)info_ptr); -#endif - *info_ptr_ptr = NULL; - } - - if (png_ptr != NULL) - { - png_write_destroy(png_ptr); -#ifdef PNG_USER_MEM_SUPPORTED - png_destroy_struct_2((png_voidp)png_ptr, (png_free_ptr)free_fn, - (png_voidp)mem_ptr); -#else - png_destroy_struct((png_voidp)png_ptr); -#endif - *png_ptr_ptr = NULL; - } -} - - -/* Free any memory used in png_ptr struct (old method) */ -void /* PRIVATE */ -png_write_destroy(png_structp png_ptr) -{ -#ifdef PNG_SETJMP_SUPPORTED - jmp_buf tmp_jmp; /* Save jump buffer */ -#endif - png_error_ptr error_fn; -#ifdef PNG_WARNINGS_SUPPORTED - png_error_ptr warning_fn; -#endif - png_voidp error_ptr; -#ifdef PNG_USER_MEM_SUPPORTED - png_free_ptr free_fn; -#endif - - png_debug(1, "in png_write_destroy"); - - /* Free any memory zlib uses */ - if (png_ptr->zlib_state != PNG_ZLIB_UNINITIALIZED) - deflateEnd(&png_ptr->zstream); - - /* Free our memory. png_free checks NULL for us. */ - png_free(png_ptr, png_ptr->zbuf); - png_free(png_ptr, png_ptr->row_buf); -#ifdef PNG_WRITE_FILTER_SUPPORTED - png_free(png_ptr, png_ptr->prev_row); - png_free(png_ptr, png_ptr->sub_row); - png_free(png_ptr, png_ptr->up_row); - png_free(png_ptr, png_ptr->avg_row); - png_free(png_ptr, png_ptr->paeth_row); -#endif - -#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED - /* Use this to save a little code space, it doesn't free the filter_costs */ - png_reset_filter_heuristics(png_ptr); - png_free(png_ptr, png_ptr->filter_costs); - png_free(png_ptr, png_ptr->inv_filter_costs); -#endif - -#ifdef PNG_SETJMP_SUPPORTED - /* Reset structure */ - png_memcpy(tmp_jmp, png_ptr->longjmp_buffer, png_sizeof(jmp_buf)); -#endif - - error_fn = png_ptr->error_fn; -#ifdef PNG_WARNINGS_SUPPORTED - warning_fn = png_ptr->warning_fn; -#endif - error_ptr = png_ptr->error_ptr; -#ifdef PNG_USER_MEM_SUPPORTED - free_fn = png_ptr->free_fn; -#endif - - png_memset(png_ptr, 0, png_sizeof(png_struct)); - - png_ptr->error_fn = error_fn; -#ifdef PNG_WARNINGS_SUPPORTED - png_ptr->warning_fn = warning_fn; -#endif - png_ptr->error_ptr = error_ptr; -#ifdef PNG_USER_MEM_SUPPORTED - png_ptr->free_fn = free_fn; -#endif - -#ifdef PNG_SETJMP_SUPPORTED - png_memcpy(png_ptr->longjmp_buffer, tmp_jmp, png_sizeof(jmp_buf)); -#endif -} - -/* Allow the application to select one or more row filters to use. */ -void PNGAPI -png_set_filter(png_structp png_ptr, int method, int filters) -{ - png_debug(1, "in png_set_filter"); - - if (png_ptr == NULL) - return; - -#ifdef PNG_MNG_FEATURES_SUPPORTED - if ((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) && - (method == PNG_INTRAPIXEL_DIFFERENCING)) - method = PNG_FILTER_TYPE_BASE; - -#endif - if (method == PNG_FILTER_TYPE_BASE) - { - switch (filters & (PNG_ALL_FILTERS | 0x07)) - { -#ifdef PNG_WRITE_FILTER_SUPPORTED - case 5: - case 6: - case 7: png_warning(png_ptr, "Unknown row filter for method 0"); -#endif /* PNG_WRITE_FILTER_SUPPORTED */ - case PNG_FILTER_VALUE_NONE: - png_ptr->do_filter = PNG_FILTER_NONE; break; - -#ifdef PNG_WRITE_FILTER_SUPPORTED - case PNG_FILTER_VALUE_SUB: - png_ptr->do_filter = PNG_FILTER_SUB; break; - - case PNG_FILTER_VALUE_UP: - png_ptr->do_filter = PNG_FILTER_UP; break; - - case PNG_FILTER_VALUE_AVG: - png_ptr->do_filter = PNG_FILTER_AVG; break; - - case PNG_FILTER_VALUE_PAETH: - png_ptr->do_filter = PNG_FILTER_PAETH; break; - - default: - png_ptr->do_filter = (png_byte)filters; break; -#else - default: - png_warning(png_ptr, "Unknown row filter for method 0"); -#endif /* PNG_WRITE_FILTER_SUPPORTED */ - } - - /* If we have allocated the row_buf, this means we have already started - * with the image and we should have allocated all of the filter buffers - * that have been selected. If prev_row isn't already allocated, then - * it is too late to start using the filters that need it, since we - * will be missing the data in the previous row. If an application - * wants to start and stop using particular filters during compression, - * it should start out with all of the filters, and then add and - * remove them after the start of compression. - */ - if (png_ptr->row_buf != NULL) - { -#ifdef PNG_WRITE_FILTER_SUPPORTED - if ((png_ptr->do_filter & PNG_FILTER_SUB) && png_ptr->sub_row == NULL) - { - png_ptr->sub_row = (png_bytep)png_malloc(png_ptr, - (png_ptr->rowbytes + 1)); - png_ptr->sub_row[0] = PNG_FILTER_VALUE_SUB; - } - - if ((png_ptr->do_filter & PNG_FILTER_UP) && png_ptr->up_row == NULL) - { - if (png_ptr->prev_row == NULL) - { - png_warning(png_ptr, "Can't add Up filter after starting"); - png_ptr->do_filter = (png_byte)(png_ptr->do_filter & - ~PNG_FILTER_UP); - } - - else - { - png_ptr->up_row = (png_bytep)png_malloc(png_ptr, - (png_ptr->rowbytes + 1)); - png_ptr->up_row[0] = PNG_FILTER_VALUE_UP; - } - } - - if ((png_ptr->do_filter & PNG_FILTER_AVG) && png_ptr->avg_row == NULL) - { - if (png_ptr->prev_row == NULL) - { - png_warning(png_ptr, "Can't add Average filter after starting"); - png_ptr->do_filter = (png_byte)(png_ptr->do_filter & - ~PNG_FILTER_AVG); - } - - else - { - png_ptr->avg_row = (png_bytep)png_malloc(png_ptr, - (png_ptr->rowbytes + 1)); - png_ptr->avg_row[0] = PNG_FILTER_VALUE_AVG; - } - } - - if ((png_ptr->do_filter & PNG_FILTER_PAETH) && - png_ptr->paeth_row == NULL) - { - if (png_ptr->prev_row == NULL) - { - png_warning(png_ptr, "Can't add Paeth filter after starting"); - png_ptr->do_filter &= (png_byte)(~PNG_FILTER_PAETH); - } - - else - { - png_ptr->paeth_row = (png_bytep)png_malloc(png_ptr, - (png_ptr->rowbytes + 1)); - png_ptr->paeth_row[0] = PNG_FILTER_VALUE_PAETH; - } - } - - if (png_ptr->do_filter == PNG_NO_FILTERS) -#endif /* PNG_WRITE_FILTER_SUPPORTED */ - png_ptr->do_filter = PNG_FILTER_NONE; - } - } - else - png_error(png_ptr, "Unknown custom filter method"); -} - -/* This allows us to influence the way in which libpng chooses the "best" - * filter for the current scanline. While the "minimum-sum-of-absolute- - * differences metric is relatively fast and effective, there is some - * question as to whether it can be improved upon by trying to keep the - * filtered data going to zlib more consistent, hopefully resulting in - * better compression. - */ -#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED /* GRR 970116 */ -/* Convenience reset API. */ -static void -png_reset_filter_heuristics(png_structp png_ptr) -{ - /* Clear out any old values in the 'weights' - this must be done because if - * the app calls set_filter_heuristics multiple times with different - * 'num_weights' values we would otherwise potentially have wrong sized - * arrays. - */ - png_ptr->num_prev_filters = 0; - png_ptr->heuristic_method = PNG_FILTER_HEURISTIC_UNWEIGHTED; - if (png_ptr->prev_filters != NULL) - { - png_bytep old = png_ptr->prev_filters; - png_ptr->prev_filters = NULL; - png_free(png_ptr, old); - } - if (png_ptr->filter_weights != NULL) - { - png_uint_16p old = png_ptr->filter_weights; - png_ptr->filter_weights = NULL; - png_free(png_ptr, old); - } - - if (png_ptr->inv_filter_weights != NULL) - { - png_uint_16p old = png_ptr->inv_filter_weights; - png_ptr->inv_filter_weights = NULL; - png_free(png_ptr, old); - } - - /* Leave the filter_costs - this array is fixed size. */ -} - -static int -png_init_filter_heuristics(png_structp png_ptr, int heuristic_method, - int num_weights) -{ - if (png_ptr == NULL) - return 0; - - /* Clear out the arrays */ - png_reset_filter_heuristics(png_ptr); - - /* Check arguments; the 'reset' function makes the correct settings for the - * unweighted case, but we must handle the weight case by initializing the - * arrays for the caller. - */ - if (heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED) - { - int i; - - if (num_weights > 0) - { - png_ptr->prev_filters = (png_bytep)png_malloc(png_ptr, - (png_uint_32)(png_sizeof(png_byte) * num_weights)); - - /* To make sure that the weighting starts out fairly */ - for (i = 0; i < num_weights; i++) - { - png_ptr->prev_filters[i] = 255; - } - - png_ptr->filter_weights = (png_uint_16p)png_malloc(png_ptr, - (png_uint_32)(png_sizeof(png_uint_16) * num_weights)); - - png_ptr->inv_filter_weights = (png_uint_16p)png_malloc(png_ptr, - (png_uint_32)(png_sizeof(png_uint_16) * num_weights)); - - for (i = 0; i < num_weights; i++) - { - png_ptr->inv_filter_weights[i] = - png_ptr->filter_weights[i] = PNG_WEIGHT_FACTOR; - } - - /* Safe to set this now */ - png_ptr->num_prev_filters = (png_byte)num_weights; - } - - /* If, in the future, there are other filter methods, this would - * need to be based on png_ptr->filter. - */ - if (png_ptr->filter_costs == NULL) - { - png_ptr->filter_costs = (png_uint_16p)png_malloc(png_ptr, - (png_uint_32)(png_sizeof(png_uint_16) * PNG_FILTER_VALUE_LAST)); - - png_ptr->inv_filter_costs = (png_uint_16p)png_malloc(png_ptr, - (png_uint_32)(png_sizeof(png_uint_16) * PNG_FILTER_VALUE_LAST)); - } - - for (i = 0; i < PNG_FILTER_VALUE_LAST; i++) - { - png_ptr->inv_filter_costs[i] = - png_ptr->filter_costs[i] = PNG_COST_FACTOR; - } - - /* All the arrays are inited, safe to set this: */ - png_ptr->heuristic_method = PNG_FILTER_HEURISTIC_WEIGHTED; - - /* Return the 'ok' code. */ - return 1; - } - else if (heuristic_method == PNG_FILTER_HEURISTIC_DEFAULT || - heuristic_method == PNG_FILTER_HEURISTIC_UNWEIGHTED) - { - return 1; - } - else - { - png_warning(png_ptr, "Unknown filter heuristic method"); - return 0; - } -} - -/* Provide floating and fixed point APIs */ -#ifdef PNG_FLOATING_POINT_SUPPORTED -void PNGAPI -png_set_filter_heuristics(png_structp png_ptr, int heuristic_method, - int num_weights, png_const_doublep filter_weights, - png_const_doublep filter_costs) -{ - png_debug(1, "in png_set_filter_heuristics"); - - /* The internal API allocates all the arrays and ensures that the elements of - * those arrays are set to the default value. - */ - if (!png_init_filter_heuristics(png_ptr, heuristic_method, num_weights)) - return; - - /* If using the weighted method copy in the weights. */ - if (heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED) - { - int i; - for (i = 0; i < num_weights; i++) - { - if (filter_weights[i] <= 0.0) - { - png_ptr->inv_filter_weights[i] = - png_ptr->filter_weights[i] = PNG_WEIGHT_FACTOR; - } - - else - { - png_ptr->inv_filter_weights[i] = - (png_uint_16)(PNG_WEIGHT_FACTOR*filter_weights[i]+.5); - - png_ptr->filter_weights[i] = - (png_uint_16)(PNG_WEIGHT_FACTOR/filter_weights[i]+.5); - } - } - - /* Here is where we set the relative costs of the different filters. We - * should take the desired compression level into account when setting - * the costs, so that Paeth, for instance, has a high relative cost at low - * compression levels, while it has a lower relative cost at higher - * compression settings. The filter types are in order of increasing - * relative cost, so it would be possible to do this with an algorithm. - */ - for (i = 0; i < PNG_FILTER_VALUE_LAST; i++) if (filter_costs[i] >= 1.0) - { - png_ptr->inv_filter_costs[i] = - (png_uint_16)(PNG_COST_FACTOR / filter_costs[i] + .5); - - png_ptr->filter_costs[i] = - (png_uint_16)(PNG_COST_FACTOR * filter_costs[i] + .5); - } - } -} -#endif /* FLOATING_POINT */ - -#ifdef PNG_FIXED_POINT_SUPPORTED -void PNGAPI -png_set_filter_heuristics_fixed(png_structp png_ptr, int heuristic_method, - int num_weights, png_const_fixed_point_p filter_weights, - png_const_fixed_point_p filter_costs) -{ - png_debug(1, "in png_set_filter_heuristics_fixed"); - - /* The internal API allocates all the arrays and ensures that the elements of - * those arrays are set to the default value. - */ - if (!png_init_filter_heuristics(png_ptr, heuristic_method, num_weights)) - return; - - /* If using the weighted method copy in the weights. */ - if (heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED) - { - int i; - for (i = 0; i < num_weights; i++) - { - if (filter_weights[i] <= 0) - { - png_ptr->inv_filter_weights[i] = - png_ptr->filter_weights[i] = PNG_WEIGHT_FACTOR; - } - - else - { - png_ptr->inv_filter_weights[i] = (png_uint_16) - ((PNG_WEIGHT_FACTOR*filter_weights[i]+PNG_FP_HALF)/PNG_FP_1); - - png_ptr->filter_weights[i] = (png_uint_16)((PNG_WEIGHT_FACTOR* - PNG_FP_1+(filter_weights[i]/2))/filter_weights[i]); - } - } - - /* Here is where we set the relative costs of the different filters. We - * should take the desired compression level into account when setting - * the costs, so that Paeth, for instance, has a high relative cost at low - * compression levels, while it has a lower relative cost at higher - * compression settings. The filter types are in order of increasing - * relative cost, so it would be possible to do this with an algorithm. - */ - for (i = 0; i < PNG_FILTER_VALUE_LAST; i++) - if (filter_costs[i] >= PNG_FP_1) - { - png_uint_32 tmp; - - /* Use a 32 bit unsigned temporary here because otherwise the - * intermediate value will be a 32 bit *signed* integer (ANSI rules) - * and this will get the wrong answer on division. - */ - tmp = PNG_COST_FACTOR*PNG_FP_1 + (filter_costs[i]/2); - tmp /= filter_costs[i]; - - png_ptr->inv_filter_costs[i] = (png_uint_16)tmp; - - tmp = PNG_COST_FACTOR * filter_costs[i] + PNG_FP_HALF; - tmp /= PNG_FP_1; - - png_ptr->filter_costs[i] = (png_uint_16)tmp; - } - } -} -#endif /* FIXED_POINT */ -#endif /* PNG_WRITE_WEIGHTED_FILTER_SUPPORTED */ - -void PNGAPI -png_set_compression_level(png_structp png_ptr, int level) -{ - png_debug(1, "in png_set_compression_level"); - - if (png_ptr == NULL) - return; - - png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_LEVEL; - png_ptr->zlib_level = level; -} - -void PNGAPI -png_set_compression_mem_level(png_structp png_ptr, int mem_level) -{ - png_debug(1, "in png_set_compression_mem_level"); - - if (png_ptr == NULL) - return; - - png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_MEM_LEVEL; - png_ptr->zlib_mem_level = mem_level; -} - -void PNGAPI -png_set_compression_strategy(png_structp png_ptr, int strategy) -{ - png_debug(1, "in png_set_compression_strategy"); - - if (png_ptr == NULL) - return; - - png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_STRATEGY; - png_ptr->zlib_strategy = strategy; -} - -/* If PNG_WRITE_OPTIMIZE_CMF_SUPPORTED is defined, libpng will use a - * smaller value of window_bits if it can do so safely. - */ -void PNGAPI -png_set_compression_window_bits(png_structp png_ptr, int window_bits) -{ - if (png_ptr == NULL) - return; - - if (window_bits > 15) - png_warning(png_ptr, "Only compression windows <= 32k supported by PNG"); - - else if (window_bits < 8) - png_warning(png_ptr, "Only compression windows >= 256 supported by PNG"); - -#ifndef WBITS_8_OK - /* Avoid libpng bug with 256-byte windows */ - if (window_bits == 8) - { - png_warning(png_ptr, "Compression window is being reset to 512"); - window_bits = 9; - } - -#endif - png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_WINDOW_BITS; - png_ptr->zlib_window_bits = window_bits; -} - -void PNGAPI -png_set_compression_method(png_structp png_ptr, int method) -{ - png_debug(1, "in png_set_compression_method"); - - if (png_ptr == NULL) - return; - - if (method != 8) - png_warning(png_ptr, "Only compression method 8 is supported by PNG"); - - png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_METHOD; - png_ptr->zlib_method = method; -} - -/* The following were added to libpng-1.5.4 */ -#ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED -void PNGAPI -png_set_text_compression_level(png_structp png_ptr, int level) -{ - png_debug(1, "in png_set_text_compression_level"); - - if (png_ptr == NULL) - return; - - png_ptr->flags |= PNG_FLAG_ZTXT_CUSTOM_LEVEL; - png_ptr->zlib_text_level = level; -} - -void PNGAPI -png_set_text_compression_mem_level(png_structp png_ptr, int mem_level) -{ - png_debug(1, "in png_set_text_compression_mem_level"); - - if (png_ptr == NULL) - return; - - png_ptr->flags |= PNG_FLAG_ZTXT_CUSTOM_MEM_LEVEL; - png_ptr->zlib_text_mem_level = mem_level; -} - -void PNGAPI -png_set_text_compression_strategy(png_structp png_ptr, int strategy) -{ - png_debug(1, "in png_set_text_compression_strategy"); - - if (png_ptr == NULL) - return; - - png_ptr->flags |= PNG_FLAG_ZTXT_CUSTOM_STRATEGY; - png_ptr->zlib_text_strategy = strategy; -} - -/* If PNG_WRITE_OPTIMIZE_CMF_SUPPORTED is defined, libpng will use a - * smaller value of window_bits if it can do so safely. - */ -void PNGAPI -png_set_text_compression_window_bits(png_structp png_ptr, int window_bits) -{ - if (png_ptr == NULL) - return; - - if (window_bits > 15) - png_warning(png_ptr, "Only compression windows <= 32k supported by PNG"); - - else if (window_bits < 8) - png_warning(png_ptr, "Only compression windows >= 256 supported by PNG"); - -#ifndef WBITS_8_OK - /* Avoid libpng bug with 256-byte windows */ - if (window_bits == 8) - { - png_warning(png_ptr, "Text compression window is being reset to 512"); - window_bits = 9; - } - -#endif - png_ptr->flags |= PNG_FLAG_ZTXT_CUSTOM_WINDOW_BITS; - png_ptr->zlib_text_window_bits = window_bits; -} - -void PNGAPI -png_set_text_compression_method(png_structp png_ptr, int method) -{ - png_debug(1, "in png_set_text_compression_method"); - - if (png_ptr == NULL) - return; - - if (method != 8) - png_warning(png_ptr, "Only compression method 8 is supported by PNG"); - - png_ptr->flags |= PNG_FLAG_ZTXT_CUSTOM_METHOD; - png_ptr->zlib_text_method = method; -} -#endif /* PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED */ -/* end of API added to libpng-1.5.4 */ - -void PNGAPI -png_set_write_status_fn(png_structp png_ptr, png_write_status_ptr write_row_fn) -{ - if (png_ptr == NULL) - return; - - png_ptr->write_row_fn = write_row_fn; -} - -#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED -void PNGAPI -png_set_write_user_transform_fn(png_structp png_ptr, png_user_transform_ptr - write_user_transform_fn) -{ - png_debug(1, "in png_set_write_user_transform_fn"); - - if (png_ptr == NULL) - return; - - png_ptr->transformations |= PNG_USER_TRANSFORM; - png_ptr->write_user_transform_fn = write_user_transform_fn; -} -#endif - - -#ifdef PNG_INFO_IMAGE_SUPPORTED -void PNGAPI -png_write_png(png_structp png_ptr, png_infop info_ptr, - int transforms, voidp params) -{ - if (png_ptr == NULL || info_ptr == NULL) - return; - - /* Write the file header information. */ - png_write_info(png_ptr, info_ptr); - - /* ------ these transformations don't touch the info structure ------- */ - -#ifdef PNG_WRITE_INVERT_SUPPORTED - /* Invert monochrome pixels */ - if (transforms & PNG_TRANSFORM_INVERT_MONO) - png_set_invert_mono(png_ptr); -#endif - -#ifdef PNG_WRITE_SHIFT_SUPPORTED - /* Shift the pixels up to a legal bit depth and fill in - * as appropriate to correctly scale the image. - */ - if ((transforms & PNG_TRANSFORM_SHIFT) - && (info_ptr->valid & PNG_INFO_sBIT)) - png_set_shift(png_ptr, &info_ptr->sig_bit); -#endif - -#ifdef PNG_WRITE_PACK_SUPPORTED - /* Pack pixels into bytes */ - if (transforms & PNG_TRANSFORM_PACKING) - png_set_packing(png_ptr); -#endif - -#ifdef PNG_WRITE_SWAP_ALPHA_SUPPORTED - /* Swap location of alpha bytes from ARGB to RGBA */ - if (transforms & PNG_TRANSFORM_SWAP_ALPHA) - png_set_swap_alpha(png_ptr); -#endif - -#ifdef PNG_WRITE_FILLER_SUPPORTED - /* Pack XRGB/RGBX/ARGB/RGBA into RGB (4 channels -> 3 channels) */ - if (transforms & PNG_TRANSFORM_STRIP_FILLER_AFTER) - png_set_filler(png_ptr, 0, PNG_FILLER_AFTER); - - else if (transforms & PNG_TRANSFORM_STRIP_FILLER_BEFORE) - png_set_filler(png_ptr, 0, PNG_FILLER_BEFORE); -#endif - -#ifdef PNG_WRITE_BGR_SUPPORTED - /* Flip BGR pixels to RGB */ - if (transforms & PNG_TRANSFORM_BGR) - png_set_bgr(png_ptr); -#endif - -#ifdef PNG_WRITE_SWAP_SUPPORTED - /* Swap bytes of 16-bit files to most significant byte first */ - if (transforms & PNG_TRANSFORM_SWAP_ENDIAN) - png_set_swap(png_ptr); -#endif - -#ifdef PNG_WRITE_PACKSWAP_SUPPORTED - /* Swap bits of 1, 2, 4 bit packed pixel formats */ - if (transforms & PNG_TRANSFORM_PACKSWAP) - png_set_packswap(png_ptr); -#endif - -#ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED - /* Invert the alpha channel from opacity to transparency */ - if (transforms & PNG_TRANSFORM_INVERT_ALPHA) - png_set_invert_alpha(png_ptr); -#endif - - /* ----------------------- end of transformations ------------------- */ - - /* Write the bits */ - if (info_ptr->valid & PNG_INFO_IDAT) - png_write_image(png_ptr, info_ptr->row_pointers); - - /* It is REQUIRED to call this to finish writing the rest of the file */ - png_write_end(png_ptr, info_ptr); - - PNG_UNUSED(transforms) /* Quiet compiler warnings */ - PNG_UNUSED(params) -} -#endif -#endif /* PNG_WRITE_SUPPORTED */ diff --git a/extern/libpng/include/pngwutil.c b/extern/libpng/include/pngwutil.c deleted file mode 100644 index b49704f1a5..0000000000 --- a/extern/libpng/include/pngwutil.c +++ /dev/null @@ -1,3179 +0,0 @@ - -/* pngwutil.c - utilities to write a PNG file - * - * Last changed in libpng 1.5.10 [March 8, 2012] - * Copyright (c) 1998-2012 Glenn Randers-Pehrson - * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) - * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) - * - * This code is released under the libpng license. - * For conditions of distribution and use, see the disclaimer - * and license in png.h - */ - -#include "pngpriv.h" - -#ifdef PNG_WRITE_SUPPORTED - -#ifdef PNG_WRITE_INT_FUNCTIONS_SUPPORTED -/* Place a 32-bit number into a buffer in PNG byte order. We work - * with unsigned numbers for convenience, although one supported - * ancillary chunk uses signed (two's complement) numbers. - */ -void PNGAPI -png_save_uint_32(png_bytep buf, png_uint_32 i) -{ - buf[0] = (png_byte)((i >> 24) & 0xff); - buf[1] = (png_byte)((i >> 16) & 0xff); - buf[2] = (png_byte)((i >> 8) & 0xff); - buf[3] = (png_byte)(i & 0xff); -} - -#ifdef PNG_SAVE_INT_32_SUPPORTED -/* The png_save_int_32 function assumes integers are stored in two's - * complement format. If this isn't the case, then this routine needs to - * be modified to write data in two's complement format. Note that, - * the following works correctly even if png_int_32 has more than 32 bits - * (compare the more complex code required on read for sign extention.) - */ -void PNGAPI -png_save_int_32(png_bytep buf, png_int_32 i) -{ - buf[0] = (png_byte)((i >> 24) & 0xff); - buf[1] = (png_byte)((i >> 16) & 0xff); - buf[2] = (png_byte)((i >> 8) & 0xff); - buf[3] = (png_byte)(i & 0xff); -} -#endif - -/* Place a 16-bit number into a buffer in PNG byte order. - * The parameter is declared unsigned int, not png_uint_16, - * just to avoid potential problems on pre-ANSI C compilers. - */ -void PNGAPI -png_save_uint_16(png_bytep buf, unsigned int i) -{ - buf[0] = (png_byte)((i >> 8) & 0xff); - buf[1] = (png_byte)(i & 0xff); -} -#endif - -/* Simple function to write the signature. If we have already written - * the magic bytes of the signature, or more likely, the PNG stream is - * being embedded into another stream and doesn't need its own signature, - * we should call png_set_sig_bytes() to tell libpng how many of the - * bytes have already been written. - */ -void PNGAPI -png_write_sig(png_structp png_ptr) -{ - png_byte png_signature[8] = {137, 80, 78, 71, 13, 10, 26, 10}; - -#ifdef PNG_IO_STATE_SUPPORTED - /* Inform the I/O callback that the signature is being written */ - png_ptr->io_state = PNG_IO_WRITING | PNG_IO_SIGNATURE; -#endif - - /* Write the rest of the 8 byte signature */ - png_write_data(png_ptr, &png_signature[png_ptr->sig_bytes], - (png_size_t)(8 - png_ptr->sig_bytes)); - - if (png_ptr->sig_bytes < 3) - png_ptr->mode |= PNG_HAVE_PNG_SIGNATURE; -} - -/* Write the start of a PNG chunk. The type is the chunk type. - * The total_length is the sum of the lengths of all the data you will be - * passing in png_write_chunk_data(). - */ -static void -png_write_chunk_header(png_structp png_ptr, png_uint_32 chunk_name, - png_uint_32 length) -{ - png_byte buf[8]; - -#if defined(PNG_DEBUG) && (PNG_DEBUG > 0) - PNG_CSTRING_FROM_CHUNK(buf, chunk_name); - png_debug2(0, "Writing %s chunk, length = %lu", buf, (unsigned long)length); -#endif - - if (png_ptr == NULL) - return; - -#ifdef PNG_IO_STATE_SUPPORTED - /* Inform the I/O callback that the chunk header is being written. - * PNG_IO_CHUNK_HDR requires a single I/O call. - */ - png_ptr->io_state = PNG_IO_WRITING | PNG_IO_CHUNK_HDR; -#endif - - /* Write the length and the chunk name */ - png_save_uint_32(buf, length); - png_save_uint_32(buf + 4, chunk_name); - png_write_data(png_ptr, buf, 8); - - /* Put the chunk name into png_ptr->chunk_name */ - png_ptr->chunk_name = chunk_name; - - /* Reset the crc and run it over the chunk name */ - png_reset_crc(png_ptr); - - png_calculate_crc(png_ptr, buf + 4, 4); - -#ifdef PNG_IO_STATE_SUPPORTED - /* Inform the I/O callback that chunk data will (possibly) be written. - * PNG_IO_CHUNK_DATA does NOT require a specific number of I/O calls. - */ - png_ptr->io_state = PNG_IO_WRITING | PNG_IO_CHUNK_DATA; -#endif -} - -void PNGAPI -png_write_chunk_start(png_structp png_ptr, png_const_bytep chunk_string, - png_uint_32 length) -{ - png_write_chunk_header(png_ptr, PNG_CHUNK_FROM_STRING(chunk_string), length); -} - -/* Write the data of a PNG chunk started with png_write_chunk_header(). - * Note that multiple calls to this function are allowed, and that the - * sum of the lengths from these calls *must* add up to the total_length - * given to png_write_chunk_header(). - */ -void PNGAPI -png_write_chunk_data(png_structp png_ptr, png_const_bytep data, - png_size_t length) -{ - /* Write the data, and run the CRC over it */ - if (png_ptr == NULL) - return; - - if (data != NULL && length > 0) - { - png_write_data(png_ptr, data, length); - - /* Update the CRC after writing the data, - * in case that the user I/O routine alters it. - */ - png_calculate_crc(png_ptr, data, length); - } -} - -/* Finish a chunk started with png_write_chunk_header(). */ -void PNGAPI -png_write_chunk_end(png_structp png_ptr) -{ - png_byte buf[4]; - - if (png_ptr == NULL) return; - -#ifdef PNG_IO_STATE_SUPPORTED - /* Inform the I/O callback that the chunk CRC is being written. - * PNG_IO_CHUNK_CRC requires a single I/O function call. - */ - png_ptr->io_state = PNG_IO_WRITING | PNG_IO_CHUNK_CRC; -#endif - - /* Write the crc in a single operation */ - png_save_uint_32(buf, png_ptr->crc); - - png_write_data(png_ptr, buf, (png_size_t)4); -} - -/* Write a PNG chunk all at once. The type is an array of ASCII characters - * representing the chunk name. The array must be at least 4 bytes in - * length, and does not need to be null terminated. To be safe, pass the - * pre-defined chunk names here, and if you need a new one, define it - * where the others are defined. The length is the length of the data. - * All the data must be present. If that is not possible, use the - * png_write_chunk_start(), png_write_chunk_data(), and png_write_chunk_end() - * functions instead. - */ -static void -png_write_complete_chunk(png_structp png_ptr, png_uint_32 chunk_name, - png_const_bytep data, png_size_t length) -{ - if (png_ptr == NULL) - return; - - /* On 64 bit architectures 'length' may not fit in a png_uint_32. */ - if (length > PNG_UINT_32_MAX) - png_error(png_ptr, "length exceeds PNG maxima"); - - png_write_chunk_header(png_ptr, chunk_name, (png_uint_32)length); - png_write_chunk_data(png_ptr, data, length); - png_write_chunk_end(png_ptr); -} - -/* This is the API that calls the internal function above. */ -void PNGAPI -png_write_chunk(png_structp png_ptr, png_const_bytep chunk_string, - png_const_bytep data, png_size_t length) -{ - png_write_complete_chunk(png_ptr, PNG_CHUNK_FROM_STRING(chunk_string), data, - length); -} - -/* Initialize the compressor for the appropriate type of compression. */ -static void -png_zlib_claim(png_structp png_ptr, png_uint_32 state) -{ - if (!(png_ptr->zlib_state & PNG_ZLIB_IN_USE)) - { - /* If already initialized for 'state' do not re-init. */ - if (png_ptr->zlib_state != state) - { - int ret = Z_OK; - png_const_charp who = "-"; - - /* If actually initialized for another state do a deflateEnd. */ - if (png_ptr->zlib_state != PNG_ZLIB_UNINITIALIZED) - { - ret = deflateEnd(&png_ptr->zstream); - who = "end"; - png_ptr->zlib_state = PNG_ZLIB_UNINITIALIZED; - } - - /* zlib itself detects an incomplete state on deflateEnd */ - if (ret == Z_OK) switch (state) - { -# ifdef PNG_WRITE_COMPRESSED_TEXT_SUPPORTED - case PNG_ZLIB_FOR_TEXT: - ret = deflateInit2(&png_ptr->zstream, - png_ptr->zlib_text_level, png_ptr->zlib_text_method, - png_ptr->zlib_text_window_bits, - png_ptr->zlib_text_mem_level, png_ptr->zlib_text_strategy); - who = "text"; - break; -# endif - - case PNG_ZLIB_FOR_IDAT: - ret = deflateInit2(&png_ptr->zstream, png_ptr->zlib_level, - png_ptr->zlib_method, png_ptr->zlib_window_bits, - png_ptr->zlib_mem_level, png_ptr->zlib_strategy); - who = "IDAT"; - break; - - default: - png_error(png_ptr, "invalid zlib state"); - } - - if (ret == Z_OK) - png_ptr->zlib_state = state; - - else /* an error in deflateEnd or deflateInit2 */ - { - size_t pos = 0; - char msg[64]; - - pos = png_safecat(msg, sizeof msg, pos, - "zlib failed to initialize compressor ("); - pos = png_safecat(msg, sizeof msg, pos, who); - - switch (ret) - { - case Z_VERSION_ERROR: - pos = png_safecat(msg, sizeof msg, pos, ") version error"); - break; - - case Z_STREAM_ERROR: - pos = png_safecat(msg, sizeof msg, pos, ") stream error"); - break; - - case Z_MEM_ERROR: - pos = png_safecat(msg, sizeof msg, pos, ") memory error"); - break; - - default: - pos = png_safecat(msg, sizeof msg, pos, ") unknown error"); - break; - } - - png_error(png_ptr, msg); - } - } - - /* Here on success, claim the zstream: */ - png_ptr->zlib_state |= PNG_ZLIB_IN_USE; - } - - else - png_error(png_ptr, "zstream already in use (internal error)"); -} - -/* The opposite: release the stream. It is also reset, this API will warn on - * error but will not fail. - */ -static void -png_zlib_release(png_structp png_ptr) -{ - if (png_ptr->zlib_state & PNG_ZLIB_IN_USE) - { - int ret = deflateReset(&png_ptr->zstream); - - png_ptr->zlib_state &= ~PNG_ZLIB_IN_USE; - - if (ret != Z_OK) - { - png_const_charp err; - PNG_WARNING_PARAMETERS(p) - - switch (ret) - { - case Z_VERSION_ERROR: - err = "version"; - break; - - case Z_STREAM_ERROR: - err = "stream"; - break; - - case Z_MEM_ERROR: - err = "memory"; - break; - - default: - err = "unknown"; - break; - } - - png_warning_parameter_signed(p, 1, PNG_NUMBER_FORMAT_d, ret); - png_warning_parameter(p, 2, err); - - if (png_ptr->zstream.msg) - err = png_ptr->zstream.msg; - else - err = "[no zlib message]"; - - png_warning_parameter(p, 3, err); - - png_formatted_warning(png_ptr, p, - "zlib failed to reset compressor: @1(@2): @3"); - } - } - - else - png_warning(png_ptr, "zstream not in use (internal error)"); -} - -#ifdef PNG_WRITE_COMPRESSED_TEXT_SUPPORTED -/* This pair of functions encapsulates the operation of (a) compressing a - * text string, and (b) issuing it later as a series of chunk data writes. - * The compression_state structure is shared context for these functions - * set up by the caller in order to make the whole mess thread-safe. - */ - -typedef struct -{ - png_const_bytep input; /* The uncompressed input data */ - png_size_t input_len; /* Its length */ - int num_output_ptr; /* Number of output pointers used */ - int max_output_ptr; /* Size of output_ptr */ - png_bytep *output_ptr; /* Array of pointers to output */ -} compression_state; - -/* Compress given text into storage in the png_ptr structure */ -static int /* PRIVATE */ -png_text_compress(png_structp png_ptr, - png_const_charp text, png_size_t text_len, int compression, - compression_state *comp) -{ - int ret; - - comp->num_output_ptr = 0; - comp->max_output_ptr = 0; - comp->output_ptr = NULL; - comp->input = NULL; - comp->input_len = text_len; - - /* We may just want to pass the text right through */ - if (compression == PNG_TEXT_COMPRESSION_NONE) - { - comp->input = (png_const_bytep)text; - return((int)text_len); - } - - if (compression >= PNG_TEXT_COMPRESSION_LAST) - { - PNG_WARNING_PARAMETERS(p) - - png_warning_parameter_signed(p, 1, PNG_NUMBER_FORMAT_d, - compression); - png_formatted_warning(png_ptr, p, "Unknown compression type @1"); - } - - /* We can't write the chunk until we find out how much data we have, - * which means we need to run the compressor first and save the - * output. This shouldn't be a problem, as the vast majority of - * comments should be reasonable, but we will set up an array of - * malloc'd pointers to be sure. - * - * If we knew the application was well behaved, we could simplify this - * greatly by assuming we can always malloc an output buffer large - * enough to hold the compressed text ((1001 * text_len / 1000) + 12) - * and malloc this directly. The only time this would be a bad idea is - * if we can't malloc more than 64K and we have 64K of random input - * data, or if the input string is incredibly large (although this - * wouldn't cause a failure, just a slowdown due to swapping). - */ - png_zlib_claim(png_ptr, PNG_ZLIB_FOR_TEXT); - - /* Set up the compression buffers */ - /* TODO: the following cast hides a potential overflow problem. */ - png_ptr->zstream.avail_in = (uInt)text_len; - - /* NOTE: assume zlib doesn't overwrite the input */ - png_ptr->zstream.next_in = (Bytef *)text; - png_ptr->zstream.avail_out = png_ptr->zbuf_size; - png_ptr->zstream.next_out = png_ptr->zbuf; - - /* This is the same compression loop as in png_write_row() */ - do - { - /* Compress the data */ - ret = deflate(&png_ptr->zstream, Z_NO_FLUSH); - - if (ret != Z_OK) - { - /* Error */ - if (png_ptr->zstream.msg != NULL) - png_error(png_ptr, png_ptr->zstream.msg); - - else - png_error(png_ptr, "zlib error"); - } - - /* Check to see if we need more room */ - if (!(png_ptr->zstream.avail_out)) - { - /* Make sure the output array has room */ - if (comp->num_output_ptr >= comp->max_output_ptr) - { - int old_max; - - old_max = comp->max_output_ptr; - comp->max_output_ptr = comp->num_output_ptr + 4; - if (comp->output_ptr != NULL) - { - png_bytepp old_ptr; - - old_ptr = comp->output_ptr; - - comp->output_ptr = (png_bytepp)png_malloc(png_ptr, - (png_alloc_size_t) - (comp->max_output_ptr * png_sizeof(png_charpp))); - - png_memcpy(comp->output_ptr, old_ptr, old_max - * png_sizeof(png_charp)); - - png_free(png_ptr, old_ptr); - } - else - comp->output_ptr = (png_bytepp)png_malloc(png_ptr, - (png_alloc_size_t) - (comp->max_output_ptr * png_sizeof(png_charp))); - } - - /* Save the data */ - comp->output_ptr[comp->num_output_ptr] = - (png_bytep)png_malloc(png_ptr, - (png_alloc_size_t)png_ptr->zbuf_size); - - png_memcpy(comp->output_ptr[comp->num_output_ptr], png_ptr->zbuf, - png_ptr->zbuf_size); - - comp->num_output_ptr++; - - /* and reset the buffer */ - png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; - png_ptr->zstream.next_out = png_ptr->zbuf; - } - /* Continue until we don't have any more to compress */ - } while (png_ptr->zstream.avail_in); - - /* Finish the compression */ - do - { - /* Tell zlib we are finished */ - ret = deflate(&png_ptr->zstream, Z_FINISH); - - if (ret == Z_OK) - { - /* Check to see if we need more room */ - if (!(png_ptr->zstream.avail_out)) - { - /* Check to make sure our output array has room */ - if (comp->num_output_ptr >= comp->max_output_ptr) - { - int old_max; - - old_max = comp->max_output_ptr; - comp->max_output_ptr = comp->num_output_ptr + 4; - if (comp->output_ptr != NULL) - { - png_bytepp old_ptr; - - old_ptr = comp->output_ptr; - - /* This could be optimized to realloc() */ - comp->output_ptr = (png_bytepp)png_malloc(png_ptr, - (png_alloc_size_t)(comp->max_output_ptr * - png_sizeof(png_charp))); - - png_memcpy(comp->output_ptr, old_ptr, - old_max * png_sizeof(png_charp)); - - png_free(png_ptr, old_ptr); - } - - else - comp->output_ptr = (png_bytepp)png_malloc(png_ptr, - (png_alloc_size_t)(comp->max_output_ptr * - png_sizeof(png_charp))); - } - - /* Save the data */ - comp->output_ptr[comp->num_output_ptr] = - (png_bytep)png_malloc(png_ptr, - (png_alloc_size_t)png_ptr->zbuf_size); - - png_memcpy(comp->output_ptr[comp->num_output_ptr], png_ptr->zbuf, - png_ptr->zbuf_size); - - comp->num_output_ptr++; - - /* and reset the buffer pointers */ - png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; - png_ptr->zstream.next_out = png_ptr->zbuf; - } - } - else if (ret != Z_STREAM_END) - { - /* We got an error */ - if (png_ptr->zstream.msg != NULL) - png_error(png_ptr, png_ptr->zstream.msg); - - else - png_error(png_ptr, "zlib error"); - } - } while (ret != Z_STREAM_END); - - /* Text length is number of buffers plus last buffer */ - text_len = png_ptr->zbuf_size * comp->num_output_ptr; - - if (png_ptr->zstream.avail_out < png_ptr->zbuf_size) - text_len += png_ptr->zbuf_size - (png_size_t)png_ptr->zstream.avail_out; - - return((int)text_len); -} - -/* Ship the compressed text out via chunk writes */ -static void /* PRIVATE */ -png_write_compressed_data_out(png_structp png_ptr, compression_state *comp, - png_size_t data_len) -{ - int i; - - /* Handle the no-compression case */ - if (comp->input) - { - png_write_chunk_data(png_ptr, comp->input, data_len); - - return; - } - -#ifdef PNG_WRITE_OPTIMIZE_CMF_SUPPORTED - /* The zbuf_size test is because the code below doesn't work if zbuf_size is - * '1'; simply skip it to avoid memory overwrite. - */ - if (data_len >= 2 && comp->input_len < 16384 && png_ptr->zbuf_size > 1) - { - unsigned int z_cmf; /* zlib compression method and flags */ - - /* Optimize the CMF field in the zlib stream. This hack of the zlib - * stream is compliant to the stream specification. - */ - - if (comp->num_output_ptr) - z_cmf = comp->output_ptr[0][0]; - else - z_cmf = png_ptr->zbuf[0]; - - if ((z_cmf & 0x0f) == 8 && (z_cmf & 0xf0) <= 0x70) - { - unsigned int z_cinfo; - unsigned int half_z_window_size; - png_size_t uncompressed_text_size = comp->input_len; - - z_cinfo = z_cmf >> 4; - half_z_window_size = 1 << (z_cinfo + 7); - - while (uncompressed_text_size <= half_z_window_size && - half_z_window_size >= 256) - { - z_cinfo--; - half_z_window_size >>= 1; - } - - z_cmf = (z_cmf & 0x0f) | (z_cinfo << 4); - - if (comp->num_output_ptr) - { - - if (comp->output_ptr[0][0] != z_cmf) - { - int tmp; - - comp->output_ptr[0][0] = (png_byte)z_cmf; - tmp = comp->output_ptr[0][1] & 0xe0; - tmp += 0x1f - ((z_cmf << 8) + tmp) % 0x1f; - comp->output_ptr[0][1] = (png_byte)tmp; - } - } - else - { - int tmp; - - png_ptr->zbuf[0] = (png_byte)z_cmf; - tmp = png_ptr->zbuf[1] & 0xe0; - tmp += 0x1f - ((z_cmf << 8) + tmp) % 0x1f; - png_ptr->zbuf[1] = (png_byte)tmp; - } - } - - else - png_error(png_ptr, - "Invalid zlib compression method or flags in non-IDAT chunk"); - } -#endif /* PNG_WRITE_OPTIMIZE_CMF_SUPPORTED */ - - /* Write saved output buffers, if any */ - for (i = 0; i < comp->num_output_ptr; i++) - { - png_write_chunk_data(png_ptr, comp->output_ptr[i], - (png_size_t)png_ptr->zbuf_size); - - png_free(png_ptr, comp->output_ptr[i]); - } - - if (comp->max_output_ptr != 0) - png_free(png_ptr, comp->output_ptr); - - /* Write anything left in zbuf */ - if (png_ptr->zstream.avail_out < (png_uint_32)png_ptr->zbuf_size) - png_write_chunk_data(png_ptr, png_ptr->zbuf, - (png_size_t)(png_ptr->zbuf_size - png_ptr->zstream.avail_out)); - - /* Reset zlib for another zTXt/iTXt or image data */ - png_zlib_release(png_ptr); -} -#endif /* PNG_WRITE_COMPRESSED_TEXT_SUPPORTED */ - -/* Write the IHDR chunk, and update the png_struct with the necessary - * information. Note that the rest of this code depends upon this - * information being correct. - */ -void /* PRIVATE */ -png_write_IHDR(png_structp png_ptr, png_uint_32 width, png_uint_32 height, - int bit_depth, int color_type, int compression_type, int filter_type, - int interlace_type) -{ - png_byte buf[13]; /* Buffer to store the IHDR info */ - - png_debug(1, "in png_write_IHDR"); - - /* Check that we have valid input data from the application info */ - switch (color_type) - { - case PNG_COLOR_TYPE_GRAY: - switch (bit_depth) - { - case 1: - case 2: - case 4: - case 8: -#ifdef PNG_WRITE_16BIT_SUPPORTED - case 16: -#endif - png_ptr->channels = 1; break; - - default: - png_error(png_ptr, - "Invalid bit depth for grayscale image"); - } - break; - - case PNG_COLOR_TYPE_RGB: -#ifdef PNG_WRITE_16BIT_SUPPORTED - if (bit_depth != 8 && bit_depth != 16) -#else - if (bit_depth != 8) -#endif - png_error(png_ptr, "Invalid bit depth for RGB image"); - - png_ptr->channels = 3; - break; - - case PNG_COLOR_TYPE_PALETTE: - switch (bit_depth) - { - case 1: - case 2: - case 4: - case 8: - png_ptr->channels = 1; - break; - - default: - png_error(png_ptr, "Invalid bit depth for paletted image"); - } - break; - - case PNG_COLOR_TYPE_GRAY_ALPHA: - if (bit_depth != 8 && bit_depth != 16) - png_error(png_ptr, "Invalid bit depth for grayscale+alpha image"); - - png_ptr->channels = 2; - break; - - case PNG_COLOR_TYPE_RGB_ALPHA: -#ifdef PNG_WRITE_16BIT_SUPPORTED - if (bit_depth != 8 && bit_depth != 16) -#else - if (bit_depth != 8) -#endif - png_error(png_ptr, "Invalid bit depth for RGBA image"); - - png_ptr->channels = 4; - break; - - default: - png_error(png_ptr, "Invalid image color type specified"); - } - - if (compression_type != PNG_COMPRESSION_TYPE_BASE) - { - png_warning(png_ptr, "Invalid compression type specified"); - compression_type = PNG_COMPRESSION_TYPE_BASE; - } - - /* Write filter_method 64 (intrapixel differencing) only if - * 1. Libpng was compiled with PNG_MNG_FEATURES_SUPPORTED and - * 2. Libpng did not write a PNG signature (this filter_method is only - * used in PNG datastreams that are embedded in MNG datastreams) and - * 3. The application called png_permit_mng_features with a mask that - * included PNG_FLAG_MNG_FILTER_64 and - * 4. The filter_method is 64 and - * 5. The color_type is RGB or RGBA - */ - if ( -#ifdef PNG_MNG_FEATURES_SUPPORTED - !((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) && - ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) == 0) && - (color_type == PNG_COLOR_TYPE_RGB || - color_type == PNG_COLOR_TYPE_RGB_ALPHA) && - (filter_type == PNG_INTRAPIXEL_DIFFERENCING)) && -#endif - filter_type != PNG_FILTER_TYPE_BASE) - { - png_warning(png_ptr, "Invalid filter type specified"); - filter_type = PNG_FILTER_TYPE_BASE; - } - -#ifdef PNG_WRITE_INTERLACING_SUPPORTED - if (interlace_type != PNG_INTERLACE_NONE && - interlace_type != PNG_INTERLACE_ADAM7) - { - png_warning(png_ptr, "Invalid interlace type specified"); - interlace_type = PNG_INTERLACE_ADAM7; - } -#else - interlace_type=PNG_INTERLACE_NONE; -#endif - - /* Save the relevent information */ - png_ptr->bit_depth = (png_byte)bit_depth; - png_ptr->color_type = (png_byte)color_type; - png_ptr->interlaced = (png_byte)interlace_type; -#ifdef PNG_MNG_FEATURES_SUPPORTED - png_ptr->filter_type = (png_byte)filter_type; -#endif - png_ptr->compression_type = (png_byte)compression_type; - png_ptr->width = width; - png_ptr->height = height; - - png_ptr->pixel_depth = (png_byte)(bit_depth * png_ptr->channels); - png_ptr->rowbytes = PNG_ROWBYTES(png_ptr->pixel_depth, width); - /* Set the usr info, so any transformations can modify it */ - png_ptr->usr_width = png_ptr->width; - png_ptr->usr_bit_depth = png_ptr->bit_depth; - png_ptr->usr_channels = png_ptr->channels; - - /* Pack the header information into the buffer */ - png_save_uint_32(buf, width); - png_save_uint_32(buf + 4, height); - buf[8] = (png_byte)bit_depth; - buf[9] = (png_byte)color_type; - buf[10] = (png_byte)compression_type; - buf[11] = (png_byte)filter_type; - buf[12] = (png_byte)interlace_type; - - /* Write the chunk */ - png_write_complete_chunk(png_ptr, png_IHDR, buf, (png_size_t)13); - - /* Initialize zlib with PNG info */ - png_ptr->zstream.zalloc = png_zalloc; - png_ptr->zstream.zfree = png_zfree; - png_ptr->zstream.opaque = (voidpf)png_ptr; - - if (!(png_ptr->do_filter)) - { - if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE || - png_ptr->bit_depth < 8) - png_ptr->do_filter = PNG_FILTER_NONE; - - else - png_ptr->do_filter = PNG_ALL_FILTERS; - } - - if (!(png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_STRATEGY)) - { - if (png_ptr->do_filter != PNG_FILTER_NONE) - png_ptr->zlib_strategy = Z_FILTERED; - - else - png_ptr->zlib_strategy = Z_DEFAULT_STRATEGY; - } - - if (!(png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_LEVEL)) - png_ptr->zlib_level = Z_DEFAULT_COMPRESSION; - - if (!(png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_MEM_LEVEL)) - png_ptr->zlib_mem_level = 8; - - if (!(png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_WINDOW_BITS)) - png_ptr->zlib_window_bits = 15; - - if (!(png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_METHOD)) - png_ptr->zlib_method = 8; - -#ifdef PNG_WRITE_COMPRESSED_TEXT_SUPPORTED -#ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED - if (!(png_ptr->flags & PNG_FLAG_ZTXT_CUSTOM_STRATEGY)) - png_ptr->zlib_text_strategy = Z_DEFAULT_STRATEGY; - - if (!(png_ptr->flags & PNG_FLAG_ZTXT_CUSTOM_LEVEL)) - png_ptr->zlib_text_level = png_ptr->zlib_level; - - if (!(png_ptr->flags & PNG_FLAG_ZTXT_CUSTOM_MEM_LEVEL)) - png_ptr->zlib_text_mem_level = png_ptr->zlib_mem_level; - - if (!(png_ptr->flags & PNG_FLAG_ZTXT_CUSTOM_WINDOW_BITS)) - png_ptr->zlib_text_window_bits = png_ptr->zlib_window_bits; - - if (!(png_ptr->flags & PNG_FLAG_ZTXT_CUSTOM_METHOD)) - png_ptr->zlib_text_method = png_ptr->zlib_method; -#else - png_ptr->zlib_text_strategy = Z_DEFAULT_STRATEGY; - png_ptr->zlib_text_level = png_ptr->zlib_level; - png_ptr->zlib_text_mem_level = png_ptr->zlib_mem_level; - png_ptr->zlib_text_window_bits = png_ptr->zlib_window_bits; - png_ptr->zlib_text_method = png_ptr->zlib_method; -#endif /* PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED */ -#endif /* PNG_WRITE_COMPRESSED_TEXT_SUPPORTED */ - - /* Record that the compressor has not yet been initialized. */ - png_ptr->zlib_state = PNG_ZLIB_UNINITIALIZED; - - png_ptr->mode = PNG_HAVE_IHDR; /* not READY_FOR_ZTXT */ -} - -/* Write the palette. We are careful not to trust png_color to be in the - * correct order for PNG, so people can redefine it to any convenient - * structure. - */ -void /* PRIVATE */ -png_write_PLTE(png_structp png_ptr, png_const_colorp palette, - png_uint_32 num_pal) -{ - png_uint_32 i; - png_const_colorp pal_ptr; - png_byte buf[3]; - - png_debug(1, "in png_write_PLTE"); - - if (( -#ifdef PNG_MNG_FEATURES_SUPPORTED - !(png_ptr->mng_features_permitted & PNG_FLAG_MNG_EMPTY_PLTE) && -#endif - num_pal == 0) || num_pal > 256) - { - if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) - { - png_error(png_ptr, "Invalid number of colors in palette"); - } - - else - { - png_warning(png_ptr, "Invalid number of colors in palette"); - return; - } - } - - if (!(png_ptr->color_type&PNG_COLOR_MASK_COLOR)) - { - png_warning(png_ptr, - "Ignoring request to write a PLTE chunk in grayscale PNG"); - - return; - } - - png_ptr->num_palette = (png_uint_16)num_pal; - png_debug1(3, "num_palette = %d", png_ptr->num_palette); - - png_write_chunk_header(png_ptr, png_PLTE, (png_uint_32)(num_pal * 3)); -#ifdef PNG_POINTER_INDEXING_SUPPORTED - - for (i = 0, pal_ptr = palette; i < num_pal; i++, pal_ptr++) - { - buf[0] = pal_ptr->red; - buf[1] = pal_ptr->green; - buf[2] = pal_ptr->blue; - png_write_chunk_data(png_ptr, buf, (png_size_t)3); - } - -#else - /* This is a little slower but some buggy compilers need to do this - * instead - */ - pal_ptr=palette; - - for (i = 0; i < num_pal; i++) - { - buf[0] = pal_ptr[i].red; - buf[1] = pal_ptr[i].green; - buf[2] = pal_ptr[i].blue; - png_write_chunk_data(png_ptr, buf, (png_size_t)3); - } - -#endif - png_write_chunk_end(png_ptr); - png_ptr->mode |= PNG_HAVE_PLTE; -} - -/* Write an IDAT chunk */ -void /* PRIVATE */ -png_write_IDAT(png_structp png_ptr, png_bytep data, png_size_t length) -{ - png_debug(1, "in png_write_IDAT"); - -#ifdef PNG_WRITE_OPTIMIZE_CMF_SUPPORTED - if (!(png_ptr->mode & PNG_HAVE_IDAT) && - png_ptr->compression_type == PNG_COMPRESSION_TYPE_BASE) - { - /* Optimize the CMF field in the zlib stream. This hack of the zlib - * stream is compliant to the stream specification. - */ - unsigned int z_cmf = data[0]; /* zlib compression method and flags */ - - if ((z_cmf & 0x0f) == 8 && (z_cmf & 0xf0) <= 0x70) - { - /* Avoid memory underflows and multiplication overflows. - * - * The conditions below are practically always satisfied; - * however, they still must be checked. - */ - if (length >= 2 && - png_ptr->height < 16384 && png_ptr->width < 16384) - { - /* Compute the maximum possible length of the datastream */ - - /* Number of pixels, plus for each row a filter byte - * and possibly a padding byte, so increase the maximum - * size to account for these. - */ - unsigned int z_cinfo; - unsigned int half_z_window_size; - png_uint_32 uncompressed_idat_size = png_ptr->height * - ((png_ptr->width * - png_ptr->channels * png_ptr->bit_depth + 15) >> 3); - - /* If it's interlaced, each block of 8 rows is sent as up to - * 14 rows, i.e., 6 additional rows, each with a filter byte - * and possibly a padding byte - */ - if (png_ptr->interlaced) - uncompressed_idat_size += ((png_ptr->height + 7)/8) * - (png_ptr->bit_depth < 8 ? 12 : 6); - - z_cinfo = z_cmf >> 4; - half_z_window_size = 1 << (z_cinfo + 7); - - while (uncompressed_idat_size <= half_z_window_size && - half_z_window_size >= 256) - { - z_cinfo--; - half_z_window_size >>= 1; - } - - z_cmf = (z_cmf & 0x0f) | (z_cinfo << 4); - - if (data[0] != z_cmf) - { - int tmp; - data[0] = (png_byte)z_cmf; - tmp = data[1] & 0xe0; - tmp += 0x1f - ((z_cmf << 8) + tmp) % 0x1f; - data[1] = (png_byte)tmp; - } - } - } - - else - png_error(png_ptr, - "Invalid zlib compression method or flags in IDAT"); - } -#endif /* PNG_WRITE_OPTIMIZE_CMF_SUPPORTED */ - - png_write_complete_chunk(png_ptr, png_IDAT, data, length); - png_ptr->mode |= PNG_HAVE_IDAT; - - /* Prior to 1.5.4 this code was replicated in every caller (except at the - * end, where it isn't technically necessary). Since this function has - * flushed the data we can safely reset the zlib output buffer here. - */ - png_ptr->zstream.next_out = png_ptr->zbuf; - png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; -} - -/* Write an IEND chunk */ -void /* PRIVATE */ -png_write_IEND(png_structp png_ptr) -{ - png_debug(1, "in png_write_IEND"); - - png_write_complete_chunk(png_ptr, png_IEND, NULL, (png_size_t)0); - png_ptr->mode |= PNG_HAVE_IEND; -} - -#ifdef PNG_WRITE_gAMA_SUPPORTED -/* Write a gAMA chunk */ -void /* PRIVATE */ -png_write_gAMA_fixed(png_structp png_ptr, png_fixed_point file_gamma) -{ - png_byte buf[4]; - - png_debug(1, "in png_write_gAMA"); - - /* file_gamma is saved in 1/100,000ths */ - png_save_uint_32(buf, (png_uint_32)file_gamma); - png_write_complete_chunk(png_ptr, png_gAMA, buf, (png_size_t)4); -} -#endif - -#ifdef PNG_WRITE_sRGB_SUPPORTED -/* Write a sRGB chunk */ -void /* PRIVATE */ -png_write_sRGB(png_structp png_ptr, int srgb_intent) -{ - png_byte buf[1]; - - png_debug(1, "in png_write_sRGB"); - - if (srgb_intent >= PNG_sRGB_INTENT_LAST) - png_warning(png_ptr, - "Invalid sRGB rendering intent specified"); - - buf[0]=(png_byte)srgb_intent; - png_write_complete_chunk(png_ptr, png_sRGB, buf, (png_size_t)1); -} -#endif - -#ifdef PNG_WRITE_iCCP_SUPPORTED -/* Write an iCCP chunk */ -void /* PRIVATE */ -png_write_iCCP(png_structp png_ptr, png_const_charp name, int compression_type, - png_const_charp profile, int profile_len) -{ - png_size_t name_len; - png_charp new_name; - compression_state comp; - int embedded_profile_len = 0; - - png_debug(1, "in png_write_iCCP"); - - comp.num_output_ptr = 0; - comp.max_output_ptr = 0; - comp.output_ptr = NULL; - comp.input = NULL; - comp.input_len = 0; - - if ((name_len = png_check_keyword(png_ptr, name, &new_name)) == 0) - return; - - if (compression_type != PNG_COMPRESSION_TYPE_BASE) - png_warning(png_ptr, "Unknown compression type in iCCP chunk"); - - if (profile == NULL) - profile_len = 0; - - if (profile_len > 3) - embedded_profile_len = - ((*( (png_const_bytep)profile ))<<24) | - ((*( (png_const_bytep)profile + 1))<<16) | - ((*( (png_const_bytep)profile + 2))<< 8) | - ((*( (png_const_bytep)profile + 3)) ); - - if (embedded_profile_len < 0) - { - png_warning(png_ptr, - "Embedded profile length in iCCP chunk is negative"); - - png_free(png_ptr, new_name); - return; - } - - if (profile_len < embedded_profile_len) - { - png_warning(png_ptr, - "Embedded profile length too large in iCCP chunk"); - - png_free(png_ptr, new_name); - return; - } - - if (profile_len > embedded_profile_len) - { - png_warning(png_ptr, - "Truncating profile to actual length in iCCP chunk"); - - profile_len = embedded_profile_len; - } - - if (profile_len) - profile_len = png_text_compress(png_ptr, profile, - (png_size_t)profile_len, PNG_COMPRESSION_TYPE_BASE, &comp); - - /* Make sure we include the NULL after the name and the compression type */ - png_write_chunk_header(png_ptr, png_iCCP, - (png_uint_32)(name_len + profile_len + 2)); - - new_name[name_len + 1] = 0x00; - - png_write_chunk_data(png_ptr, (png_bytep)new_name, - (png_size_t)(name_len + 2)); - - if (profile_len) - { - png_write_compressed_data_out(png_ptr, &comp, profile_len); - } - - png_write_chunk_end(png_ptr); - png_free(png_ptr, new_name); -} -#endif - -#ifdef PNG_WRITE_sPLT_SUPPORTED -/* Write a sPLT chunk */ -void /* PRIVATE */ -png_write_sPLT(png_structp png_ptr, png_const_sPLT_tp spalette) -{ - png_size_t name_len; - png_charp new_name; - png_byte entrybuf[10]; - png_size_t entry_size = (spalette->depth == 8 ? 6 : 10); - png_size_t palette_size = entry_size * spalette->nentries; - png_sPLT_entryp ep; -#ifndef PNG_POINTER_INDEXING_SUPPORTED - int i; -#endif - - png_debug(1, "in png_write_sPLT"); - - if ((name_len = png_check_keyword(png_ptr,spalette->name, &new_name))==0) - return; - - /* Make sure we include the NULL after the name */ - png_write_chunk_header(png_ptr, png_sPLT, - (png_uint_32)(name_len + 2 + palette_size)); - - png_write_chunk_data(png_ptr, (png_bytep)new_name, - (png_size_t)(name_len + 1)); - - png_write_chunk_data(png_ptr, &spalette->depth, (png_size_t)1); - - /* Loop through each palette entry, writing appropriately */ -#ifdef PNG_POINTER_INDEXING_SUPPORTED - for (ep = spalette->entries; epentries + spalette->nentries; ep++) - { - if (spalette->depth == 8) - { - entrybuf[0] = (png_byte)ep->red; - entrybuf[1] = (png_byte)ep->green; - entrybuf[2] = (png_byte)ep->blue; - entrybuf[3] = (png_byte)ep->alpha; - png_save_uint_16(entrybuf + 4, ep->frequency); - } - - else - { - png_save_uint_16(entrybuf + 0, ep->red); - png_save_uint_16(entrybuf + 2, ep->green); - png_save_uint_16(entrybuf + 4, ep->blue); - png_save_uint_16(entrybuf + 6, ep->alpha); - png_save_uint_16(entrybuf + 8, ep->frequency); - } - - png_write_chunk_data(png_ptr, entrybuf, (png_size_t)entry_size); - } -#else - ep=spalette->entries; - for (i = 0; i>spalette->nentries; i++) - { - if (spalette->depth == 8) - { - entrybuf[0] = (png_byte)ep[i].red; - entrybuf[1] = (png_byte)ep[i].green; - entrybuf[2] = (png_byte)ep[i].blue; - entrybuf[3] = (png_byte)ep[i].alpha; - png_save_uint_16(entrybuf + 4, ep[i].frequency); - } - - else - { - png_save_uint_16(entrybuf + 0, ep[i].red); - png_save_uint_16(entrybuf + 2, ep[i].green); - png_save_uint_16(entrybuf + 4, ep[i].blue); - png_save_uint_16(entrybuf + 6, ep[i].alpha); - png_save_uint_16(entrybuf + 8, ep[i].frequency); - } - - png_write_chunk_data(png_ptr, entrybuf, (png_size_t)entry_size); - } -#endif - - png_write_chunk_end(png_ptr); - png_free(png_ptr, new_name); -} -#endif - -#ifdef PNG_WRITE_sBIT_SUPPORTED -/* Write the sBIT chunk */ -void /* PRIVATE */ -png_write_sBIT(png_structp png_ptr, png_const_color_8p sbit, int color_type) -{ - png_byte buf[4]; - png_size_t size; - - png_debug(1, "in png_write_sBIT"); - - /* Make sure we don't depend upon the order of PNG_COLOR_8 */ - if (color_type & PNG_COLOR_MASK_COLOR) - { - png_byte maxbits; - - maxbits = (png_byte)(color_type==PNG_COLOR_TYPE_PALETTE ? 8 : - png_ptr->usr_bit_depth); - - if (sbit->red == 0 || sbit->red > maxbits || - sbit->green == 0 || sbit->green > maxbits || - sbit->blue == 0 || sbit->blue > maxbits) - { - png_warning(png_ptr, "Invalid sBIT depth specified"); - return; - } - - buf[0] = sbit->red; - buf[1] = sbit->green; - buf[2] = sbit->blue; - size = 3; - } - - else - { - if (sbit->gray == 0 || sbit->gray > png_ptr->usr_bit_depth) - { - png_warning(png_ptr, "Invalid sBIT depth specified"); - return; - } - - buf[0] = sbit->gray; - size = 1; - } - - if (color_type & PNG_COLOR_MASK_ALPHA) - { - if (sbit->alpha == 0 || sbit->alpha > png_ptr->usr_bit_depth) - { - png_warning(png_ptr, "Invalid sBIT depth specified"); - return; - } - - buf[size++] = sbit->alpha; - } - - png_write_complete_chunk(png_ptr, png_sBIT, buf, size); -} -#endif - -#ifdef PNG_WRITE_cHRM_SUPPORTED -/* Write the cHRM chunk */ -void /* PRIVATE */ -png_write_cHRM_fixed(png_structp png_ptr, png_fixed_point white_x, - png_fixed_point white_y, png_fixed_point red_x, png_fixed_point red_y, - png_fixed_point green_x, png_fixed_point green_y, png_fixed_point blue_x, - png_fixed_point blue_y) -{ - png_byte buf[32]; - - png_debug(1, "in png_write_cHRM"); - - /* Each value is saved in 1/100,000ths */ -#ifdef PNG_CHECK_cHRM_SUPPORTED - if (png_check_cHRM_fixed(png_ptr, white_x, white_y, red_x, red_y, - green_x, green_y, blue_x, blue_y)) -#endif - { - png_save_uint_32(buf, (png_uint_32)white_x); - png_save_uint_32(buf + 4, (png_uint_32)white_y); - - png_save_uint_32(buf + 8, (png_uint_32)red_x); - png_save_uint_32(buf + 12, (png_uint_32)red_y); - - png_save_uint_32(buf + 16, (png_uint_32)green_x); - png_save_uint_32(buf + 20, (png_uint_32)green_y); - - png_save_uint_32(buf + 24, (png_uint_32)blue_x); - png_save_uint_32(buf + 28, (png_uint_32)blue_y); - - png_write_complete_chunk(png_ptr, png_cHRM, buf, (png_size_t)32); - } -} -#endif - -#ifdef PNG_WRITE_tRNS_SUPPORTED -/* Write the tRNS chunk */ -void /* PRIVATE */ -png_write_tRNS(png_structp png_ptr, png_const_bytep trans_alpha, - png_const_color_16p tran, int num_trans, int color_type) -{ - png_byte buf[6]; - - png_debug(1, "in png_write_tRNS"); - - if (color_type == PNG_COLOR_TYPE_PALETTE) - { - if (num_trans <= 0 || num_trans > (int)png_ptr->num_palette) - { - png_warning(png_ptr, "Invalid number of transparent colors specified"); - return; - } - - /* Write the chunk out as it is */ - png_write_complete_chunk(png_ptr, png_tRNS, trans_alpha, (png_size_t)num_trans); - } - - else if (color_type == PNG_COLOR_TYPE_GRAY) - { - /* One 16 bit value */ - if (tran->gray >= (1 << png_ptr->bit_depth)) - { - png_warning(png_ptr, - "Ignoring attempt to write tRNS chunk out-of-range for bit_depth"); - - return; - } - - png_save_uint_16(buf, tran->gray); - png_write_complete_chunk(png_ptr, png_tRNS, buf, (png_size_t)2); - } - - else if (color_type == PNG_COLOR_TYPE_RGB) - { - /* Three 16 bit values */ - png_save_uint_16(buf, tran->red); - png_save_uint_16(buf + 2, tran->green); - png_save_uint_16(buf + 4, tran->blue); -#ifdef PNG_WRITE_16BIT_SUPPORTED - if (png_ptr->bit_depth == 8 && (buf[0] | buf[2] | buf[4])) -#else - if (buf[0] | buf[2] | buf[4]) -#endif - { - png_warning(png_ptr, - "Ignoring attempt to write 16-bit tRNS chunk when bit_depth is 8"); - return; - } - - png_write_complete_chunk(png_ptr, png_tRNS, buf, (png_size_t)6); - } - - else - { - png_warning(png_ptr, "Can't write tRNS with an alpha channel"); - } -} -#endif - -#ifdef PNG_WRITE_bKGD_SUPPORTED -/* Write the background chunk */ -void /* PRIVATE */ -png_write_bKGD(png_structp png_ptr, png_const_color_16p back, int color_type) -{ - png_byte buf[6]; - - png_debug(1, "in png_write_bKGD"); - - if (color_type == PNG_COLOR_TYPE_PALETTE) - { - if ( -#ifdef PNG_MNG_FEATURES_SUPPORTED - (png_ptr->num_palette || - (!(png_ptr->mng_features_permitted & PNG_FLAG_MNG_EMPTY_PLTE))) && -#endif - back->index >= png_ptr->num_palette) - { - png_warning(png_ptr, "Invalid background palette index"); - return; - } - - buf[0] = back->index; - png_write_complete_chunk(png_ptr, png_bKGD, buf, (png_size_t)1); - } - - else if (color_type & PNG_COLOR_MASK_COLOR) - { - png_save_uint_16(buf, back->red); - png_save_uint_16(buf + 2, back->green); - png_save_uint_16(buf + 4, back->blue); -#ifdef PNG_WRITE_16BIT_SUPPORTED - if (png_ptr->bit_depth == 8 && (buf[0] | buf[2] | buf[4])) -#else - if (buf[0] | buf[2] | buf[4]) -#endif - { - png_warning(png_ptr, - "Ignoring attempt to write 16-bit bKGD chunk when bit_depth is 8"); - - return; - } - - png_write_complete_chunk(png_ptr, png_bKGD, buf, (png_size_t)6); - } - - else - { - if (back->gray >= (1 << png_ptr->bit_depth)) - { - png_warning(png_ptr, - "Ignoring attempt to write bKGD chunk out-of-range for bit_depth"); - - return; - } - - png_save_uint_16(buf, back->gray); - png_write_complete_chunk(png_ptr, png_bKGD, buf, (png_size_t)2); - } -} -#endif - -#ifdef PNG_WRITE_hIST_SUPPORTED -/* Write the histogram */ -void /* PRIVATE */ -png_write_hIST(png_structp png_ptr, png_const_uint_16p hist, int num_hist) -{ - int i; - png_byte buf[3]; - - png_debug(1, "in png_write_hIST"); - - if (num_hist > (int)png_ptr->num_palette) - { - png_debug2(3, "num_hist = %d, num_palette = %d", num_hist, - png_ptr->num_palette); - - png_warning(png_ptr, "Invalid number of histogram entries specified"); - return; - } - - png_write_chunk_header(png_ptr, png_hIST, (png_uint_32)(num_hist * 2)); - - for (i = 0; i < num_hist; i++) - { - png_save_uint_16(buf, hist[i]); - png_write_chunk_data(png_ptr, buf, (png_size_t)2); - } - - png_write_chunk_end(png_ptr); -} -#endif - -#if defined(PNG_WRITE_TEXT_SUPPORTED) || defined(PNG_WRITE_pCAL_SUPPORTED) || \ - defined(PNG_WRITE_iCCP_SUPPORTED) || defined(PNG_WRITE_sPLT_SUPPORTED) -/* Check that the tEXt or zTXt keyword is valid per PNG 1.0 specification, - * and if invalid, correct the keyword rather than discarding the entire - * chunk. The PNG 1.0 specification requires keywords 1-79 characters in - * length, forbids leading or trailing whitespace, multiple internal spaces, - * and the non-break space (0x80) from ISO 8859-1. Returns keyword length. - * - * The new_key is allocated to hold the corrected keyword and must be freed - * by the calling routine. This avoids problems with trying to write to - * static keywords without having to have duplicate copies of the strings. - */ -png_size_t /* PRIVATE */ -png_check_keyword(png_structp png_ptr, png_const_charp key, png_charpp new_key) -{ - png_size_t key_len; - png_const_charp ikp; - png_charp kp, dp; - int kflag; - int kwarn=0; - - png_debug(1, "in png_check_keyword"); - - *new_key = NULL; - - if (key == NULL || (key_len = png_strlen(key)) == 0) - { - png_warning(png_ptr, "zero length keyword"); - return ((png_size_t)0); - } - - png_debug1(2, "Keyword to be checked is '%s'", key); - - *new_key = (png_charp)png_malloc_warn(png_ptr, (png_uint_32)(key_len + 2)); - - if (*new_key == NULL) - { - png_warning(png_ptr, "Out of memory while procesing keyword"); - return ((png_size_t)0); - } - - /* Replace non-printing characters with a blank and print a warning */ - for (ikp = key, dp = *new_key; *ikp != '\0'; ikp++, dp++) - { - if ((png_byte)*ikp < 0x20 || - ((png_byte)*ikp > 0x7E && (png_byte)*ikp < 0xA1)) - { - PNG_WARNING_PARAMETERS(p) - - png_warning_parameter_unsigned(p, 1, PNG_NUMBER_FORMAT_02x, - (png_byte)*ikp); - png_formatted_warning(png_ptr, p, "invalid keyword character 0x@1"); - *dp = ' '; - } - - else - { - *dp = *ikp; - } - } - *dp = '\0'; - - /* Remove any trailing white space. */ - kp = *new_key + key_len - 1; - if (*kp == ' ') - { - png_warning(png_ptr, "trailing spaces removed from keyword"); - - while (*kp == ' ') - { - *(kp--) = '\0'; - key_len--; - } - } - - /* Remove any leading white space. */ - kp = *new_key; - if (*kp == ' ') - { - png_warning(png_ptr, "leading spaces removed from keyword"); - - while (*kp == ' ') - { - kp++; - key_len--; - } - } - - png_debug1(2, "Checking for multiple internal spaces in '%s'", kp); - - /* Remove multiple internal spaces. */ - for (kflag = 0, dp = *new_key; *kp != '\0'; kp++) - { - if (*kp == ' ' && kflag == 0) - { - *(dp++) = *kp; - kflag = 1; - } - - else if (*kp == ' ') - { - key_len--; - kwarn = 1; - } - - else - { - *(dp++) = *kp; - kflag = 0; - } - } - *dp = '\0'; - if (kwarn) - png_warning(png_ptr, "extra interior spaces removed from keyword"); - - if (key_len == 0) - { - png_free(png_ptr, *new_key); - png_warning(png_ptr, "Zero length keyword"); - } - - if (key_len > 79) - { - png_warning(png_ptr, "keyword length must be 1 - 79 characters"); - (*new_key)[79] = '\0'; - key_len = 79; - } - - return (key_len); -} -#endif - -#ifdef PNG_WRITE_tEXt_SUPPORTED -/* Write a tEXt chunk */ -void /* PRIVATE */ -png_write_tEXt(png_structp png_ptr, png_const_charp key, png_const_charp text, - png_size_t text_len) -{ - png_size_t key_len; - png_charp new_key; - - png_debug(1, "in png_write_tEXt"); - - if ((key_len = png_check_keyword(png_ptr, key, &new_key))==0) - return; - - if (text == NULL || *text == '\0') - text_len = 0; - - else - text_len = png_strlen(text); - - /* Make sure we include the 0 after the key */ - png_write_chunk_header(png_ptr, png_tEXt, - (png_uint_32)(key_len + text_len + 1)); - /* - * We leave it to the application to meet PNG-1.0 requirements on the - * contents of the text. PNG-1.0 through PNG-1.2 discourage the use of - * any non-Latin-1 characters except for NEWLINE. ISO PNG will forbid them. - * The NUL character is forbidden by PNG-1.0 through PNG-1.2 and ISO PNG. - */ - png_write_chunk_data(png_ptr, (png_bytep)new_key, - (png_size_t)(key_len + 1)); - - if (text_len) - png_write_chunk_data(png_ptr, (png_const_bytep)text, - (png_size_t)text_len); - - png_write_chunk_end(png_ptr); - png_free(png_ptr, new_key); -} -#endif - -#ifdef PNG_WRITE_zTXt_SUPPORTED -/* Write a compressed text chunk */ -void /* PRIVATE */ -png_write_zTXt(png_structp png_ptr, png_const_charp key, png_const_charp text, - png_size_t text_len, int compression) -{ - png_size_t key_len; - png_byte buf; - png_charp new_key; - compression_state comp; - - png_debug(1, "in png_write_zTXt"); - - comp.num_output_ptr = 0; - comp.max_output_ptr = 0; - comp.output_ptr = NULL; - comp.input = NULL; - comp.input_len = 0; - - if ((key_len = png_check_keyword(png_ptr, key, &new_key)) == 0) - { - png_free(png_ptr, new_key); - return; - } - - if (text == NULL || *text == '\0' || compression==PNG_TEXT_COMPRESSION_NONE) - { - png_write_tEXt(png_ptr, new_key, text, (png_size_t)0); - png_free(png_ptr, new_key); - return; - } - - text_len = png_strlen(text); - - /* Compute the compressed data; do it now for the length */ - text_len = png_text_compress(png_ptr, text, text_len, compression, - &comp); - - /* Write start of chunk */ - png_write_chunk_header(png_ptr, png_zTXt, - (png_uint_32)(key_len+text_len + 2)); - - /* Write key */ - png_write_chunk_data(png_ptr, (png_bytep)new_key, - (png_size_t)(key_len + 1)); - - png_free(png_ptr, new_key); - - buf = (png_byte)compression; - - /* Write compression */ - png_write_chunk_data(png_ptr, &buf, (png_size_t)1); - - /* Write the compressed data */ - png_write_compressed_data_out(png_ptr, &comp, text_len); - - /* Close the chunk */ - png_write_chunk_end(png_ptr); -} -#endif - -#ifdef PNG_WRITE_iTXt_SUPPORTED -/* Write an iTXt chunk */ -void /* PRIVATE */ -png_write_iTXt(png_structp png_ptr, int compression, png_const_charp key, - png_const_charp lang, png_const_charp lang_key, png_const_charp text) -{ - png_size_t lang_len, key_len, lang_key_len, text_len; - png_charp new_lang; - png_charp new_key = NULL; - png_byte cbuf[2]; - compression_state comp; - - png_debug(1, "in png_write_iTXt"); - - comp.num_output_ptr = 0; - comp.max_output_ptr = 0; - comp.output_ptr = NULL; - comp.input = NULL; - - if ((key_len = png_check_keyword(png_ptr, key, &new_key)) == 0) - return; - - if ((lang_len = png_check_keyword(png_ptr, lang, &new_lang)) == 0) - { - png_warning(png_ptr, "Empty language field in iTXt chunk"); - new_lang = NULL; - lang_len = 0; - } - - if (lang_key == NULL) - lang_key_len = 0; - - else - lang_key_len = png_strlen(lang_key); - - if (text == NULL) - text_len = 0; - - else - text_len = png_strlen(text); - - /* Compute the compressed data; do it now for the length */ - text_len = png_text_compress(png_ptr, text, text_len, compression - 2, - &comp); - - - /* Make sure we include the compression flag, the compression byte, - * and the NULs after the key, lang, and lang_key parts - */ - - png_write_chunk_header(png_ptr, png_iTXt, (png_uint_32)( - 5 /* comp byte, comp flag, terminators for key, lang and lang_key */ - + key_len - + lang_len - + lang_key_len - + text_len)); - - /* We leave it to the application to meet PNG-1.0 requirements on the - * contents of the text. PNG-1.0 through PNG-1.2 discourage the use of - * any non-Latin-1 characters except for NEWLINE. ISO PNG will forbid them. - * The NUL character is forbidden by PNG-1.0 through PNG-1.2 and ISO PNG. - */ - png_write_chunk_data(png_ptr, (png_bytep)new_key, (png_size_t)(key_len + 1)); - - /* Set the compression flag */ - if (compression == PNG_ITXT_COMPRESSION_NONE || - compression == PNG_TEXT_COMPRESSION_NONE) - cbuf[0] = 0; - - else /* compression == PNG_ITXT_COMPRESSION_zTXt */ - cbuf[0] = 1; - - /* Set the compression method */ - cbuf[1] = 0; - - png_write_chunk_data(png_ptr, cbuf, (png_size_t)2); - - cbuf[0] = 0; - png_write_chunk_data(png_ptr, (new_lang ? (png_const_bytep)new_lang : cbuf), - (png_size_t)(lang_len + 1)); - - png_write_chunk_data(png_ptr, (lang_key ? (png_const_bytep)lang_key : cbuf), - (png_size_t)(lang_key_len + 1)); - - png_write_compressed_data_out(png_ptr, &comp, text_len); - - png_write_chunk_end(png_ptr); - - png_free(png_ptr, new_key); - png_free(png_ptr, new_lang); -} -#endif - -#ifdef PNG_WRITE_oFFs_SUPPORTED -/* Write the oFFs chunk */ -void /* PRIVATE */ -png_write_oFFs(png_structp png_ptr, png_int_32 x_offset, png_int_32 y_offset, - int unit_type) -{ - png_byte buf[9]; - - png_debug(1, "in png_write_oFFs"); - - if (unit_type >= PNG_OFFSET_LAST) - png_warning(png_ptr, "Unrecognized unit type for oFFs chunk"); - - png_save_int_32(buf, x_offset); - png_save_int_32(buf + 4, y_offset); - buf[8] = (png_byte)unit_type; - - png_write_complete_chunk(png_ptr, png_oFFs, buf, (png_size_t)9); -} -#endif -#ifdef PNG_WRITE_pCAL_SUPPORTED -/* Write the pCAL chunk (described in the PNG extensions document) */ -void /* PRIVATE */ -png_write_pCAL(png_structp png_ptr, png_charp purpose, png_int_32 X0, - png_int_32 X1, int type, int nparams, png_const_charp units, - png_charpp params) -{ - png_size_t purpose_len, units_len, total_len; - png_size_tp params_len; - png_byte buf[10]; - png_charp new_purpose; - int i; - - png_debug1(1, "in png_write_pCAL (%d parameters)", nparams); - - if (type >= PNG_EQUATION_LAST) - png_warning(png_ptr, "Unrecognized equation type for pCAL chunk"); - - purpose_len = png_check_keyword(png_ptr, purpose, &new_purpose) + 1; - png_debug1(3, "pCAL purpose length = %d", (int)purpose_len); - units_len = png_strlen(units) + (nparams == 0 ? 0 : 1); - png_debug1(3, "pCAL units length = %d", (int)units_len); - total_len = purpose_len + units_len + 10; - - params_len = (png_size_tp)png_malloc(png_ptr, - (png_alloc_size_t)(nparams * png_sizeof(png_size_t))); - - /* Find the length of each parameter, making sure we don't count the - * null terminator for the last parameter. - */ - for (i = 0; i < nparams; i++) - { - params_len[i] = png_strlen(params[i]) + (i == nparams - 1 ? 0 : 1); - png_debug2(3, "pCAL parameter %d length = %lu", i, - (unsigned long)params_len[i]); - total_len += params_len[i]; - } - - png_debug1(3, "pCAL total length = %d", (int)total_len); - png_write_chunk_header(png_ptr, png_pCAL, (png_uint_32)total_len); - png_write_chunk_data(png_ptr, (png_const_bytep)new_purpose, purpose_len); - png_save_int_32(buf, X0); - png_save_int_32(buf + 4, X1); - buf[8] = (png_byte)type; - buf[9] = (png_byte)nparams; - png_write_chunk_data(png_ptr, buf, (png_size_t)10); - png_write_chunk_data(png_ptr, (png_const_bytep)units, (png_size_t)units_len); - - png_free(png_ptr, new_purpose); - - for (i = 0; i < nparams; i++) - { - png_write_chunk_data(png_ptr, (png_const_bytep)params[i], params_len[i]); - } - - png_free(png_ptr, params_len); - png_write_chunk_end(png_ptr); -} -#endif - -#ifdef PNG_WRITE_sCAL_SUPPORTED -/* Write the sCAL chunk */ -void /* PRIVATE */ -png_write_sCAL_s(png_structp png_ptr, int unit, png_const_charp width, - png_const_charp height) -{ - png_byte buf[64]; - png_size_t wlen, hlen, total_len; - - png_debug(1, "in png_write_sCAL_s"); - - wlen = png_strlen(width); - hlen = png_strlen(height); - total_len = wlen + hlen + 2; - - if (total_len > 64) - { - png_warning(png_ptr, "Can't write sCAL (buffer too small)"); - return; - } - - buf[0] = (png_byte)unit; - png_memcpy(buf + 1, width, wlen + 1); /* Append the '\0' here */ - png_memcpy(buf + wlen + 2, height, hlen); /* Do NOT append the '\0' here */ - - png_debug1(3, "sCAL total length = %u", (unsigned int)total_len); - png_write_complete_chunk(png_ptr, png_sCAL, buf, total_len); -} -#endif - -#ifdef PNG_WRITE_pHYs_SUPPORTED -/* Write the pHYs chunk */ -void /* PRIVATE */ -png_write_pHYs(png_structp png_ptr, png_uint_32 x_pixels_per_unit, - png_uint_32 y_pixels_per_unit, - int unit_type) -{ - png_byte buf[9]; - - png_debug(1, "in png_write_pHYs"); - - if (unit_type >= PNG_RESOLUTION_LAST) - png_warning(png_ptr, "Unrecognized unit type for pHYs chunk"); - - png_save_uint_32(buf, x_pixels_per_unit); - png_save_uint_32(buf + 4, y_pixels_per_unit); - buf[8] = (png_byte)unit_type; - - png_write_complete_chunk(png_ptr, png_pHYs, buf, (png_size_t)9); -} -#endif - -#ifdef PNG_WRITE_tIME_SUPPORTED -/* Write the tIME chunk. Use either png_convert_from_struct_tm() - * or png_convert_from_time_t(), or fill in the structure yourself. - */ -void /* PRIVATE */ -png_write_tIME(png_structp png_ptr, png_const_timep mod_time) -{ - png_byte buf[7]; - - png_debug(1, "in png_write_tIME"); - - if (mod_time->month > 12 || mod_time->month < 1 || - mod_time->day > 31 || mod_time->day < 1 || - mod_time->hour > 23 || mod_time->second > 60) - { - png_warning(png_ptr, "Invalid time specified for tIME chunk"); - return; - } - - png_save_uint_16(buf, mod_time->year); - buf[2] = mod_time->month; - buf[3] = mod_time->day; - buf[4] = mod_time->hour; - buf[5] = mod_time->minute; - buf[6] = mod_time->second; - - png_write_complete_chunk(png_ptr, png_tIME, buf, (png_size_t)7); -} -#endif - -/* Initializes the row writing capability of libpng */ -void /* PRIVATE */ -png_write_start_row(png_structp png_ptr) -{ -#ifdef PNG_WRITE_INTERLACING_SUPPORTED - /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */ - - /* Start of interlace block */ - static PNG_CONST png_byte png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0}; - - /* Offset to next interlace block */ - static PNG_CONST png_byte png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1}; - - /* Start of interlace block in the y direction */ - static PNG_CONST png_byte png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1}; - - /* Offset to next interlace block in the y direction */ - static PNG_CONST png_byte png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2}; -#endif - - png_alloc_size_t buf_size; - int usr_pixel_depth; - - png_debug(1, "in png_write_start_row"); - - usr_pixel_depth = png_ptr->usr_channels * png_ptr->usr_bit_depth; - buf_size = PNG_ROWBYTES(usr_pixel_depth, png_ptr->width) + 1; - - /* 1.5.6: added to allow checking in the row write code. */ - png_ptr->transformed_pixel_depth = png_ptr->pixel_depth; - png_ptr->maximum_pixel_depth = (png_byte)usr_pixel_depth; - - /* Set up row buffer */ - png_ptr->row_buf = (png_bytep)png_malloc(png_ptr, buf_size); - - png_ptr->row_buf[0] = PNG_FILTER_VALUE_NONE; - -#ifdef PNG_WRITE_FILTER_SUPPORTED - /* Set up filtering buffer, if using this filter */ - if (png_ptr->do_filter & PNG_FILTER_SUB) - { - png_ptr->sub_row = (png_bytep)png_malloc(png_ptr, png_ptr->rowbytes + 1); - - png_ptr->sub_row[0] = PNG_FILTER_VALUE_SUB; - } - - /* We only need to keep the previous row if we are using one of these. */ - if (png_ptr->do_filter & (PNG_FILTER_AVG | PNG_FILTER_UP | PNG_FILTER_PAETH)) - { - /* Set up previous row buffer */ - png_ptr->prev_row = (png_bytep)png_calloc(png_ptr, buf_size); - - if (png_ptr->do_filter & PNG_FILTER_UP) - { - png_ptr->up_row = (png_bytep)png_malloc(png_ptr, - png_ptr->rowbytes + 1); - - png_ptr->up_row[0] = PNG_FILTER_VALUE_UP; - } - - if (png_ptr->do_filter & PNG_FILTER_AVG) - { - png_ptr->avg_row = (png_bytep)png_malloc(png_ptr, - png_ptr->rowbytes + 1); - - png_ptr->avg_row[0] = PNG_FILTER_VALUE_AVG; - } - - if (png_ptr->do_filter & PNG_FILTER_PAETH) - { - png_ptr->paeth_row = (png_bytep)png_malloc(png_ptr, - png_ptr->rowbytes + 1); - - png_ptr->paeth_row[0] = PNG_FILTER_VALUE_PAETH; - } - } -#endif /* PNG_WRITE_FILTER_SUPPORTED */ - -#ifdef PNG_WRITE_INTERLACING_SUPPORTED - /* If interlaced, we need to set up width and height of pass */ - if (png_ptr->interlaced) - { - if (!(png_ptr->transformations & PNG_INTERLACE)) - { - png_ptr->num_rows = (png_ptr->height + png_pass_yinc[0] - 1 - - png_pass_ystart[0]) / png_pass_yinc[0]; - - png_ptr->usr_width = (png_ptr->width + png_pass_inc[0] - 1 - - png_pass_start[0]) / png_pass_inc[0]; - } - - else - { - png_ptr->num_rows = png_ptr->height; - png_ptr->usr_width = png_ptr->width; - } - } - - else -#endif - { - png_ptr->num_rows = png_ptr->height; - png_ptr->usr_width = png_ptr->width; - } - - png_zlib_claim(png_ptr, PNG_ZLIB_FOR_IDAT); - png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; - png_ptr->zstream.next_out = png_ptr->zbuf; -} - -/* Internal use only. Called when finished processing a row of data. */ -void /* PRIVATE */ -png_write_finish_row(png_structp png_ptr) -{ -#ifdef PNG_WRITE_INTERLACING_SUPPORTED - /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */ - - /* Start of interlace block */ - static PNG_CONST png_byte png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0}; - - /* Offset to next interlace block */ - static PNG_CONST png_byte png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1}; - - /* Start of interlace block in the y direction */ - static PNG_CONST png_byte png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1}; - - /* Offset to next interlace block in the y direction */ - static PNG_CONST png_byte png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2}; -#endif - - int ret; - - png_debug(1, "in png_write_finish_row"); - - /* Next row */ - png_ptr->row_number++; - - /* See if we are done */ - if (png_ptr->row_number < png_ptr->num_rows) - return; - -#ifdef PNG_WRITE_INTERLACING_SUPPORTED - /* If interlaced, go to next pass */ - if (png_ptr->interlaced) - { - png_ptr->row_number = 0; - if (png_ptr->transformations & PNG_INTERLACE) - { - png_ptr->pass++; - } - - else - { - /* Loop until we find a non-zero width or height pass */ - do - { - png_ptr->pass++; - - if (png_ptr->pass >= 7) - break; - - png_ptr->usr_width = (png_ptr->width + - png_pass_inc[png_ptr->pass] - 1 - - png_pass_start[png_ptr->pass]) / - png_pass_inc[png_ptr->pass]; - - png_ptr->num_rows = (png_ptr->height + - png_pass_yinc[png_ptr->pass] - 1 - - png_pass_ystart[png_ptr->pass]) / - png_pass_yinc[png_ptr->pass]; - - if (png_ptr->transformations & PNG_INTERLACE) - break; - - } while (png_ptr->usr_width == 0 || png_ptr->num_rows == 0); - - } - - /* Reset the row above the image for the next pass */ - if (png_ptr->pass < 7) - { - if (png_ptr->prev_row != NULL) - png_memset(png_ptr->prev_row, 0, - (png_size_t)(PNG_ROWBYTES(png_ptr->usr_channels* - png_ptr->usr_bit_depth, png_ptr->width)) + 1); - - return; - } - } -#endif - - /* If we get here, we've just written the last row, so we need - to flush the compressor */ - do - { - /* Tell the compressor we are done */ - ret = deflate(&png_ptr->zstream, Z_FINISH); - - /* Check for an error */ - if (ret == Z_OK) - { - /* Check to see if we need more room */ - if (!(png_ptr->zstream.avail_out)) - { - png_write_IDAT(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size); - png_ptr->zstream.next_out = png_ptr->zbuf; - png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; - } - } - - else if (ret != Z_STREAM_END) - { - if (png_ptr->zstream.msg != NULL) - png_error(png_ptr, png_ptr->zstream.msg); - - else - png_error(png_ptr, "zlib error"); - } - } while (ret != Z_STREAM_END); - - /* Write any extra space */ - if (png_ptr->zstream.avail_out < png_ptr->zbuf_size) - { - png_write_IDAT(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size - - png_ptr->zstream.avail_out); - } - - png_zlib_release(png_ptr); - png_ptr->zstream.data_type = Z_BINARY; -} - -#ifdef PNG_WRITE_INTERLACING_SUPPORTED -/* Pick out the correct pixels for the interlace pass. - * The basic idea here is to go through the row with a source - * pointer and a destination pointer (sp and dp), and copy the - * correct pixels for the pass. As the row gets compacted, - * sp will always be >= dp, so we should never overwrite anything. - * See the default: case for the easiest code to understand. - */ -void /* PRIVATE */ -png_do_write_interlace(png_row_infop row_info, png_bytep row, int pass) -{ - /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */ - - /* Start of interlace block */ - static PNG_CONST png_byte png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0}; - - /* Offset to next interlace block */ - static PNG_CONST png_byte png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1}; - - png_debug(1, "in png_do_write_interlace"); - - /* We don't have to do anything on the last pass (6) */ - if (pass < 6) - { - /* Each pixel depth is handled separately */ - switch (row_info->pixel_depth) - { - case 1: - { - png_bytep sp; - png_bytep dp; - int shift; - int d; - int value; - png_uint_32 i; - png_uint_32 row_width = row_info->width; - - dp = row; - d = 0; - shift = 7; - - for (i = png_pass_start[pass]; i < row_width; - i += png_pass_inc[pass]) - { - sp = row + (png_size_t)(i >> 3); - value = (int)(*sp >> (7 - (int)(i & 0x07))) & 0x01; - d |= (value << shift); - - if (shift == 0) - { - shift = 7; - *dp++ = (png_byte)d; - d = 0; - } - - else - shift--; - - } - if (shift != 7) - *dp = (png_byte)d; - - break; - } - - case 2: - { - png_bytep sp; - png_bytep dp; - int shift; - int d; - int value; - png_uint_32 i; - png_uint_32 row_width = row_info->width; - - dp = row; - shift = 6; - d = 0; - - for (i = png_pass_start[pass]; i < row_width; - i += png_pass_inc[pass]) - { - sp = row + (png_size_t)(i >> 2); - value = (*sp >> ((3 - (int)(i & 0x03)) << 1)) & 0x03; - d |= (value << shift); - - if (shift == 0) - { - shift = 6; - *dp++ = (png_byte)d; - d = 0; - } - - else - shift -= 2; - } - if (shift != 6) - *dp = (png_byte)d; - - break; - } - - case 4: - { - png_bytep sp; - png_bytep dp; - int shift; - int d; - int value; - png_uint_32 i; - png_uint_32 row_width = row_info->width; - - dp = row; - shift = 4; - d = 0; - for (i = png_pass_start[pass]; i < row_width; - i += png_pass_inc[pass]) - { - sp = row + (png_size_t)(i >> 1); - value = (*sp >> ((1 - (int)(i & 0x01)) << 2)) & 0x0f; - d |= (value << shift); - - if (shift == 0) - { - shift = 4; - *dp++ = (png_byte)d; - d = 0; - } - - else - shift -= 4; - } - if (shift != 4) - *dp = (png_byte)d; - - break; - } - - default: - { - png_bytep sp; - png_bytep dp; - png_uint_32 i; - png_uint_32 row_width = row_info->width; - png_size_t pixel_bytes; - - /* Start at the beginning */ - dp = row; - - /* Find out how many bytes each pixel takes up */ - pixel_bytes = (row_info->pixel_depth >> 3); - - /* Loop through the row, only looking at the pixels that matter */ - for (i = png_pass_start[pass]; i < row_width; - i += png_pass_inc[pass]) - { - /* Find out where the original pixel is */ - sp = row + (png_size_t)i * pixel_bytes; - - /* Move the pixel */ - if (dp != sp) - png_memcpy(dp, sp, pixel_bytes); - - /* Next pixel */ - dp += pixel_bytes; - } - break; - } - } - /* Set new row width */ - row_info->width = (row_info->width + - png_pass_inc[pass] - 1 - - png_pass_start[pass]) / - png_pass_inc[pass]; - - row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, - row_info->width); - } -} -#endif - -/* This filters the row, chooses which filter to use, if it has not already - * been specified by the application, and then writes the row out with the - * chosen filter. - */ -static void png_write_filtered_row(png_structp png_ptr, png_bytep filtered_row, - png_size_t row_bytes); - -#define PNG_MAXSUM (((png_uint_32)(-1)) >> 1) -#define PNG_HISHIFT 10 -#define PNG_LOMASK ((png_uint_32)0xffffL) -#define PNG_HIMASK ((png_uint_32)(~PNG_LOMASK >> PNG_HISHIFT)) -void /* PRIVATE */ -png_write_find_filter(png_structp png_ptr, png_row_infop row_info) -{ - png_bytep best_row; -#ifdef PNG_WRITE_FILTER_SUPPORTED - png_bytep prev_row, row_buf; - png_uint_32 mins, bpp; - png_byte filter_to_do = png_ptr->do_filter; - png_size_t row_bytes = row_info->rowbytes; -#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED - int num_p_filters = png_ptr->num_prev_filters; -#endif - - png_debug(1, "in png_write_find_filter"); - -#ifndef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED - if (png_ptr->row_number == 0 && filter_to_do == PNG_ALL_FILTERS) - { - /* These will never be selected so we need not test them. */ - filter_to_do &= ~(PNG_FILTER_UP | PNG_FILTER_PAETH); - } -#endif - - /* Find out how many bytes offset each pixel is */ - bpp = (row_info->pixel_depth + 7) >> 3; - - prev_row = png_ptr->prev_row; -#endif - best_row = png_ptr->row_buf; -#ifdef PNG_WRITE_FILTER_SUPPORTED - row_buf = best_row; - mins = PNG_MAXSUM; - - /* The prediction method we use is to find which method provides the - * smallest value when summing the absolute values of the distances - * from zero, using anything >= 128 as negative numbers. This is known - * as the "minimum sum of absolute differences" heuristic. Other - * heuristics are the "weighted minimum sum of absolute differences" - * (experimental and can in theory improve compression), and the "zlib - * predictive" method (not implemented yet), which does test compressions - * of lines using different filter methods, and then chooses the - * (series of) filter(s) that give minimum compressed data size (VERY - * computationally expensive). - * - * GRR 980525: consider also - * - * (1) minimum sum of absolute differences from running average (i.e., - * keep running sum of non-absolute differences & count of bytes) - * [track dispersion, too? restart average if dispersion too large?] - * - * (1b) minimum sum of absolute differences from sliding average, probably - * with window size <= deflate window (usually 32K) - * - * (2) minimum sum of squared differences from zero or running average - * (i.e., ~ root-mean-square approach) - */ - - - /* We don't need to test the 'no filter' case if this is the only filter - * that has been chosen, as it doesn't actually do anything to the data. - */ - if ((filter_to_do & PNG_FILTER_NONE) && filter_to_do != PNG_FILTER_NONE) - { - png_bytep rp; - png_uint_32 sum = 0; - png_size_t i; - int v; - - for (i = 0, rp = row_buf + 1; i < row_bytes; i++, rp++) - { - v = *rp; - sum += (v < 128) ? v : 256 - v; - } - -#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED - if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED) - { - png_uint_32 sumhi, sumlo; - int j; - sumlo = sum & PNG_LOMASK; - sumhi = (sum >> PNG_HISHIFT) & PNG_HIMASK; /* Gives us some footroom */ - - /* Reduce the sum if we match any of the previous rows */ - for (j = 0; j < num_p_filters; j++) - { - if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_NONE) - { - sumlo = (sumlo * png_ptr->filter_weights[j]) >> - PNG_WEIGHT_SHIFT; - - sumhi = (sumhi * png_ptr->filter_weights[j]) >> - PNG_WEIGHT_SHIFT; - } - } - - /* Factor in the cost of this filter (this is here for completeness, - * but it makes no sense to have a "cost" for the NONE filter, as - * it has the minimum possible computational cost - none). - */ - sumlo = (sumlo * png_ptr->filter_costs[PNG_FILTER_VALUE_NONE]) >> - PNG_COST_SHIFT; - - sumhi = (sumhi * png_ptr->filter_costs[PNG_FILTER_VALUE_NONE]) >> - PNG_COST_SHIFT; - - if (sumhi > PNG_HIMASK) - sum = PNG_MAXSUM; - - else - sum = (sumhi << PNG_HISHIFT) + sumlo; - } -#endif - mins = sum; - } - - /* Sub filter */ - if (filter_to_do == PNG_FILTER_SUB) - /* It's the only filter so no testing is needed */ - { - png_bytep rp, lp, dp; - png_size_t i; - - for (i = 0, rp = row_buf + 1, dp = png_ptr->sub_row + 1; i < bpp; - i++, rp++, dp++) - { - *dp = *rp; - } - - for (lp = row_buf + 1; i < row_bytes; - i++, rp++, lp++, dp++) - { - *dp = (png_byte)(((int)*rp - (int)*lp) & 0xff); - } - - best_row = png_ptr->sub_row; - } - - else if (filter_to_do & PNG_FILTER_SUB) - { - png_bytep rp, dp, lp; - png_uint_32 sum = 0, lmins = mins; - png_size_t i; - int v; - -#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED - /* We temporarily increase the "minimum sum" by the factor we - * would reduce the sum of this filter, so that we can do the - * early exit comparison without scaling the sum each time. - */ - if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED) - { - int j; - png_uint_32 lmhi, lmlo; - lmlo = lmins & PNG_LOMASK; - lmhi = (lmins >> PNG_HISHIFT) & PNG_HIMASK; - - for (j = 0; j < num_p_filters; j++) - { - if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_SUB) - { - lmlo = (lmlo * png_ptr->inv_filter_weights[j]) >> - PNG_WEIGHT_SHIFT; - - lmhi = (lmhi * png_ptr->inv_filter_weights[j]) >> - PNG_WEIGHT_SHIFT; - } - } - - lmlo = (lmlo * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_SUB]) >> - PNG_COST_SHIFT; - - lmhi = (lmhi * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_SUB]) >> - PNG_COST_SHIFT; - - if (lmhi > PNG_HIMASK) - lmins = PNG_MAXSUM; - - else - lmins = (lmhi << PNG_HISHIFT) + lmlo; - } -#endif - - for (i = 0, rp = row_buf + 1, dp = png_ptr->sub_row + 1; i < bpp; - i++, rp++, dp++) - { - v = *dp = *rp; - - sum += (v < 128) ? v : 256 - v; - } - - for (lp = row_buf + 1; i < row_bytes; - i++, rp++, lp++, dp++) - { - v = *dp = (png_byte)(((int)*rp - (int)*lp) & 0xff); - - sum += (v < 128) ? v : 256 - v; - - if (sum > lmins) /* We are already worse, don't continue. */ - break; - } - -#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED - if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED) - { - int j; - png_uint_32 sumhi, sumlo; - sumlo = sum & PNG_LOMASK; - sumhi = (sum >> PNG_HISHIFT) & PNG_HIMASK; - - for (j = 0; j < num_p_filters; j++) - { - if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_SUB) - { - sumlo = (sumlo * png_ptr->inv_filter_weights[j]) >> - PNG_WEIGHT_SHIFT; - - sumhi = (sumhi * png_ptr->inv_filter_weights[j]) >> - PNG_WEIGHT_SHIFT; - } - } - - sumlo = (sumlo * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_SUB]) >> - PNG_COST_SHIFT; - - sumhi = (sumhi * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_SUB]) >> - PNG_COST_SHIFT; - - if (sumhi > PNG_HIMASK) - sum = PNG_MAXSUM; - - else - sum = (sumhi << PNG_HISHIFT) + sumlo; - } -#endif - - if (sum < mins) - { - mins = sum; - best_row = png_ptr->sub_row; - } - } - - /* Up filter */ - if (filter_to_do == PNG_FILTER_UP) - { - png_bytep rp, dp, pp; - png_size_t i; - - for (i = 0, rp = row_buf + 1, dp = png_ptr->up_row + 1, - pp = prev_row + 1; i < row_bytes; - i++, rp++, pp++, dp++) - { - *dp = (png_byte)(((int)*rp - (int)*pp) & 0xff); - } - - best_row = png_ptr->up_row; - } - - else if (filter_to_do & PNG_FILTER_UP) - { - png_bytep rp, dp, pp; - png_uint_32 sum = 0, lmins = mins; - png_size_t i; - int v; - - -#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED - if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED) - { - int j; - png_uint_32 lmhi, lmlo; - lmlo = lmins & PNG_LOMASK; - lmhi = (lmins >> PNG_HISHIFT) & PNG_HIMASK; - - for (j = 0; j < num_p_filters; j++) - { - if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_UP) - { - lmlo = (lmlo * png_ptr->inv_filter_weights[j]) >> - PNG_WEIGHT_SHIFT; - - lmhi = (lmhi * png_ptr->inv_filter_weights[j]) >> - PNG_WEIGHT_SHIFT; - } - } - - lmlo = (lmlo * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_UP]) >> - PNG_COST_SHIFT; - - lmhi = (lmhi * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_UP]) >> - PNG_COST_SHIFT; - - if (lmhi > PNG_HIMASK) - lmins = PNG_MAXSUM; - - else - lmins = (lmhi << PNG_HISHIFT) + lmlo; - } -#endif - - for (i = 0, rp = row_buf + 1, dp = png_ptr->up_row + 1, - pp = prev_row + 1; i < row_bytes; i++) - { - v = *dp++ = (png_byte)(((int)*rp++ - (int)*pp++) & 0xff); - - sum += (v < 128) ? v : 256 - v; - - if (sum > lmins) /* We are already worse, don't continue. */ - break; - } - -#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED - if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED) - { - int j; - png_uint_32 sumhi, sumlo; - sumlo = sum & PNG_LOMASK; - sumhi = (sum >> PNG_HISHIFT) & PNG_HIMASK; - - for (j = 0; j < num_p_filters; j++) - { - if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_UP) - { - sumlo = (sumlo * png_ptr->filter_weights[j]) >> - PNG_WEIGHT_SHIFT; - - sumhi = (sumhi * png_ptr->filter_weights[j]) >> - PNG_WEIGHT_SHIFT; - } - } - - sumlo = (sumlo * png_ptr->filter_costs[PNG_FILTER_VALUE_UP]) >> - PNG_COST_SHIFT; - - sumhi = (sumhi * png_ptr->filter_costs[PNG_FILTER_VALUE_UP]) >> - PNG_COST_SHIFT; - - if (sumhi > PNG_HIMASK) - sum = PNG_MAXSUM; - - else - sum = (sumhi << PNG_HISHIFT) + sumlo; - } -#endif - - if (sum < mins) - { - mins = sum; - best_row = png_ptr->up_row; - } - } - - /* Avg filter */ - if (filter_to_do == PNG_FILTER_AVG) - { - png_bytep rp, dp, pp, lp; - png_uint_32 i; - - for (i = 0, rp = row_buf + 1, dp = png_ptr->avg_row + 1, - pp = prev_row + 1; i < bpp; i++) - { - *dp++ = (png_byte)(((int)*rp++ - ((int)*pp++ / 2)) & 0xff); - } - - for (lp = row_buf + 1; i < row_bytes; i++) - { - *dp++ = (png_byte)(((int)*rp++ - (((int)*pp++ + (int)*lp++) / 2)) - & 0xff); - } - best_row = png_ptr->avg_row; - } - - else if (filter_to_do & PNG_FILTER_AVG) - { - png_bytep rp, dp, pp, lp; - png_uint_32 sum = 0, lmins = mins; - png_size_t i; - int v; - -#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED - if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED) - { - int j; - png_uint_32 lmhi, lmlo; - lmlo = lmins & PNG_LOMASK; - lmhi = (lmins >> PNG_HISHIFT) & PNG_HIMASK; - - for (j = 0; j < num_p_filters; j++) - { - if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_AVG) - { - lmlo = (lmlo * png_ptr->inv_filter_weights[j]) >> - PNG_WEIGHT_SHIFT; - - lmhi = (lmhi * png_ptr->inv_filter_weights[j]) >> - PNG_WEIGHT_SHIFT; - } - } - - lmlo = (lmlo * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_AVG]) >> - PNG_COST_SHIFT; - - lmhi = (lmhi * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_AVG]) >> - PNG_COST_SHIFT; - - if (lmhi > PNG_HIMASK) - lmins = PNG_MAXSUM; - - else - lmins = (lmhi << PNG_HISHIFT) + lmlo; - } -#endif - - for (i = 0, rp = row_buf + 1, dp = png_ptr->avg_row + 1, - pp = prev_row + 1; i < bpp; i++) - { - v = *dp++ = (png_byte)(((int)*rp++ - ((int)*pp++ / 2)) & 0xff); - - sum += (v < 128) ? v : 256 - v; - } - - for (lp = row_buf + 1; i < row_bytes; i++) - { - v = *dp++ = - (png_byte)(((int)*rp++ - (((int)*pp++ + (int)*lp++) / 2)) & 0xff); - - sum += (v < 128) ? v : 256 - v; - - if (sum > lmins) /* We are already worse, don't continue. */ - break; - } - -#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED - if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED) - { - int j; - png_uint_32 sumhi, sumlo; - sumlo = sum & PNG_LOMASK; - sumhi = (sum >> PNG_HISHIFT) & PNG_HIMASK; - - for (j = 0; j < num_p_filters; j++) - { - if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_NONE) - { - sumlo = (sumlo * png_ptr->filter_weights[j]) >> - PNG_WEIGHT_SHIFT; - - sumhi = (sumhi * png_ptr->filter_weights[j]) >> - PNG_WEIGHT_SHIFT; - } - } - - sumlo = (sumlo * png_ptr->filter_costs[PNG_FILTER_VALUE_AVG]) >> - PNG_COST_SHIFT; - - sumhi = (sumhi * png_ptr->filter_costs[PNG_FILTER_VALUE_AVG]) >> - PNG_COST_SHIFT; - - if (sumhi > PNG_HIMASK) - sum = PNG_MAXSUM; - - else - sum = (sumhi << PNG_HISHIFT) + sumlo; - } -#endif - - if (sum < mins) - { - mins = sum; - best_row = png_ptr->avg_row; - } - } - - /* Paeth filter */ - if (filter_to_do == PNG_FILTER_PAETH) - { - png_bytep rp, dp, pp, cp, lp; - png_size_t i; - - for (i = 0, rp = row_buf + 1, dp = png_ptr->paeth_row + 1, - pp = prev_row + 1; i < bpp; i++) - { - *dp++ = (png_byte)(((int)*rp++ - (int)*pp++) & 0xff); - } - - for (lp = row_buf + 1, cp = prev_row + 1; i < row_bytes; i++) - { - int a, b, c, pa, pb, pc, p; - - b = *pp++; - c = *cp++; - a = *lp++; - - p = b - c; - pc = a - c; - -#ifdef PNG_USE_ABS - pa = abs(p); - pb = abs(pc); - pc = abs(p + pc); -#else - pa = p < 0 ? -p : p; - pb = pc < 0 ? -pc : pc; - pc = (p + pc) < 0 ? -(p + pc) : p + pc; -#endif - - p = (pa <= pb && pa <=pc) ? a : (pb <= pc) ? b : c; - - *dp++ = (png_byte)(((int)*rp++ - p) & 0xff); - } - best_row = png_ptr->paeth_row; - } - - else if (filter_to_do & PNG_FILTER_PAETH) - { - png_bytep rp, dp, pp, cp, lp; - png_uint_32 sum = 0, lmins = mins; - png_size_t i; - int v; - -#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED - if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED) - { - int j; - png_uint_32 lmhi, lmlo; - lmlo = lmins & PNG_LOMASK; - lmhi = (lmins >> PNG_HISHIFT) & PNG_HIMASK; - - for (j = 0; j < num_p_filters; j++) - { - if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_PAETH) - { - lmlo = (lmlo * png_ptr->inv_filter_weights[j]) >> - PNG_WEIGHT_SHIFT; - - lmhi = (lmhi * png_ptr->inv_filter_weights[j]) >> - PNG_WEIGHT_SHIFT; - } - } - - lmlo = (lmlo * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_PAETH]) >> - PNG_COST_SHIFT; - - lmhi = (lmhi * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_PAETH]) >> - PNG_COST_SHIFT; - - if (lmhi > PNG_HIMASK) - lmins = PNG_MAXSUM; - - else - lmins = (lmhi << PNG_HISHIFT) + lmlo; - } -#endif - - for (i = 0, rp = row_buf + 1, dp = png_ptr->paeth_row + 1, - pp = prev_row + 1; i < bpp; i++) - { - v = *dp++ = (png_byte)(((int)*rp++ - (int)*pp++) & 0xff); - - sum += (v < 128) ? v : 256 - v; - } - - for (lp = row_buf + 1, cp = prev_row + 1; i < row_bytes; i++) - { - int a, b, c, pa, pb, pc, p; - - b = *pp++; - c = *cp++; - a = *lp++; - -#ifndef PNG_SLOW_PAETH - p = b - c; - pc = a - c; -#ifdef PNG_USE_ABS - pa = abs(p); - pb = abs(pc); - pc = abs(p + pc); -#else - pa = p < 0 ? -p : p; - pb = pc < 0 ? -pc : pc; - pc = (p + pc) < 0 ? -(p + pc) : p + pc; -#endif - p = (pa <= pb && pa <=pc) ? a : (pb <= pc) ? b : c; -#else /* PNG_SLOW_PAETH */ - p = a + b - c; - pa = abs(p - a); - pb = abs(p - b); - pc = abs(p - c); - - if (pa <= pb && pa <= pc) - p = a; - - else if (pb <= pc) - p = b; - - else - p = c; -#endif /* PNG_SLOW_PAETH */ - - v = *dp++ = (png_byte)(((int)*rp++ - p) & 0xff); - - sum += (v < 128) ? v : 256 - v; - - if (sum > lmins) /* We are already worse, don't continue. */ - break; - } - -#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED - if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED) - { - int j; - png_uint_32 sumhi, sumlo; - sumlo = sum & PNG_LOMASK; - sumhi = (sum >> PNG_HISHIFT) & PNG_HIMASK; - - for (j = 0; j < num_p_filters; j++) - { - if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_PAETH) - { - sumlo = (sumlo * png_ptr->filter_weights[j]) >> - PNG_WEIGHT_SHIFT; - - sumhi = (sumhi * png_ptr->filter_weights[j]) >> - PNG_WEIGHT_SHIFT; - } - } - - sumlo = (sumlo * png_ptr->filter_costs[PNG_FILTER_VALUE_PAETH]) >> - PNG_COST_SHIFT; - - sumhi = (sumhi * png_ptr->filter_costs[PNG_FILTER_VALUE_PAETH]) >> - PNG_COST_SHIFT; - - if (sumhi > PNG_HIMASK) - sum = PNG_MAXSUM; - - else - sum = (sumhi << PNG_HISHIFT) + sumlo; - } -#endif - - if (sum < mins) - { - best_row = png_ptr->paeth_row; - } - } -#endif /* PNG_WRITE_FILTER_SUPPORTED */ - - /* Do the actual writing of the filtered row data from the chosen filter. */ - png_write_filtered_row(png_ptr, best_row, row_info->rowbytes+1); - -#ifdef PNG_WRITE_FILTER_SUPPORTED -#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED - /* Save the type of filter we picked this time for future calculations */ - if (png_ptr->num_prev_filters > 0) - { - int j; - - for (j = 1; j < num_p_filters; j++) - { - png_ptr->prev_filters[j] = png_ptr->prev_filters[j - 1]; - } - - png_ptr->prev_filters[j] = best_row[0]; - } -#endif -#endif /* PNG_WRITE_FILTER_SUPPORTED */ -} - - -/* Do the actual writing of a previously filtered row. */ -static void -png_write_filtered_row(png_structp png_ptr, png_bytep filtered_row, - png_size_t avail/*includes filter byte*/) -{ - png_debug(1, "in png_write_filtered_row"); - - png_debug1(2, "filter = %d", filtered_row[0]); - /* Set up the zlib input buffer */ - - png_ptr->zstream.next_in = filtered_row; - png_ptr->zstream.avail_in = 0; - /* Repeat until we have compressed all the data */ - do - { - int ret; /* Return of zlib */ - - /* Record the number of bytes available - zlib supports at least 65535 - * bytes at one step, depending on the size of the zlib type 'uInt', the - * maximum size zlib can write at once is ZLIB_IO_MAX (from pngpriv.h). - * Use this because on 16 bit systems 'rowbytes' can be up to 65536 (i.e. - * one more than 16 bits) and, in this case 'rowbytes+1' can overflow a - * uInt. ZLIB_IO_MAX can be safely reduced to cause zlib to be called - * with smaller chunks of data. - */ - if (png_ptr->zstream.avail_in == 0) - { - if (avail > ZLIB_IO_MAX) - { - png_ptr->zstream.avail_in = ZLIB_IO_MAX; - avail -= ZLIB_IO_MAX; - } - - else - { - /* So this will fit in the available uInt space: */ - png_ptr->zstream.avail_in = (uInt)avail; - avail = 0; - } - } - - /* Compress the data */ - ret = deflate(&png_ptr->zstream, Z_NO_FLUSH); - - /* Check for compression errors */ - if (ret != Z_OK) - { - if (png_ptr->zstream.msg != NULL) - png_error(png_ptr, png_ptr->zstream.msg); - - else - png_error(png_ptr, "zlib error"); - } - - /* See if it is time to write another IDAT */ - if (!(png_ptr->zstream.avail_out)) - { - /* Write the IDAT and reset the zlib output buffer */ - png_write_IDAT(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size); - } - /* Repeat until all data has been compressed */ - } while (avail > 0 || png_ptr->zstream.avail_in > 0); - - /* Swap the current and previous rows */ - if (png_ptr->prev_row != NULL) - { - png_bytep tptr; - - tptr = png_ptr->prev_row; - png_ptr->prev_row = png_ptr->row_buf; - png_ptr->row_buf = tptr; - } - - /* Finish row - updates counters and flushes zlib if last row */ - png_write_finish_row(png_ptr); - -#ifdef PNG_WRITE_FLUSH_SUPPORTED - png_ptr->flush_rows++; - - if (png_ptr->flush_dist > 0 && - png_ptr->flush_rows >= png_ptr->flush_dist) - { - png_write_flush(png_ptr); - } -#endif -} -#endif /* PNG_WRITE_SUPPORTED */ diff --git a/extern/libpng/include/projects/vstudio/readme.txt b/extern/libpng/include/projects/vstudio/readme.txt deleted file mode 100644 index 938e7dad0b..0000000000 --- a/extern/libpng/include/projects/vstudio/readme.txt +++ /dev/null @@ -1,64 +0,0 @@ - -VisualStudio instructions - -libpng version 1.5.10 - March 29, 2012 - -Copyright (c) 1998-2010 Glenn Randers-Pehrson - -This code is released under the libpng license. -For conditions of distribution and use, see the disclaimer -and license in png.h - -This directory contains support for building libpng under MicroSoft -VisualStudio 2010. It may also work under later versions of VisualStudio. -You should be familiar with VisualStudio before using this directory. - -Initial preparations -==================== -You must enter some information in zlib.props before attempting to build -with this 'solution'. Please read and edit zlib.props first. You will -probably not be familiar with the contents of zlib.props - do not worry, -it is mostly harmless. - -This is all you need to do to build the 'release' and 'release library' -configurations. - -Debugging -========= -The release configurations default to /Ox optimization. Full debugging -information is produced (in the .pdb), but if you encounter a problem the -optimization may make it difficult to debug. Simply rebuild with a lower -optimization level (e.g. /Od.) - -Linking your application -======================== -Normally you should link against the 'release' configuration. This builds a -DLL for libpng 1.5 with the default runtime options used by Visual Studio -2010. In particular the runtime library is the "MultiThreaded DLL" version. -If you use Visual Studio defaults to build your application you will have no -problems. - -If you don't use the Visual Studio defaults your application must still be built -with the default runtime option (/MD). If, for some reason, it is not then your -application will crash inside libpng15.dll as soon as libpng tries to read -from a file handle you pass in. - -If you do not want to use the DLL, for example for a very small application, -the 'release library' configuration may be more appropriate. This is built -with a non-standard runtime library - the "MultiThreaded" version. When you -build your application it must be compiled with this option (/MT), otherwise -it will not build (if you are lucky) or crash (if you are not.) - -Stop reading here -================= -You have enough information to build a working application. - -Debug versions have limited support -=================================== -This solution includes limited support for debug versions of libpng. You -do not need these unless your own solution itself uses debug builds (it is -far more effective to debug on the release builds, there is no point building -a special debug build.) - -The debug build of libpng is minimally supported. Support for debug builds of -zlib is also minimal. You really don't want to do this. diff --git a/extern/libpng/include/projects/vstudio/zlib.props b/extern/libpng/include/projects/vstudio/zlib.props deleted file mode 100644 index 0060f127e6..0000000000 --- a/extern/libpng/include/projects/vstudio/zlib.props +++ /dev/null @@ -1,37 +0,0 @@ - - - - - - - ..\..\..\..\zlib-1.2.5 - - diff --git a/extern/libpng/include/scripts/def.dfn b/extern/libpng/include/scripts/def.dfn deleted file mode 100644 index f9918631de..0000000000 --- a/extern/libpng/include/scripts/def.dfn +++ /dev/null @@ -1,38 +0,0 @@ -/* def.dfn - define format of libpng.def - * - * Last changed in libpng version 1.5.7 [December 15, 2011] - * Copyright (c) 2010-2011 Glenn Randers-Pehrson - * - * This code is released under the libpng license. - * For conditions of distribution and use, see the disclaimer - * and license in png.h - */ - -/* These macros exist to make the header and trailer shorter below: */ -#define S PNG_DEFN_MAGIC -#define E PNG_DEFN_END - -/* Write the export file header: */ -S-;---------------------------------------------------------------E -S-; LIBPNG module definition file for OS/2-E -S-;---------------------------------------------------------------E -S--E -S-; If you give the library an explicit name one or other files-E -S-; may need modifying to support the new name on one or more-E -S-; systems.-E -S-LIBRARY-E -S-OS2 DESCRIPTION "PNG image compression library"-E -S-OS2 CODE PRELOAD MOVEABLE DISCARDABLE-E -S--E -S-EXPORTS-E -S-;Version 1.5.0beta58-E - -/* NOTE: PNG_JOIN is interpreted by the calling script as a signal to - * join the two things on either side, so we can do symbol - * substitution within the name, regular C ## joins the pp-tokens, - * not their final values. - */ -#define PNG_EXPORTA(ordinal, type, name, args, attributes)\ - PNG_DEFN_MAGIC- SYMBOL_PREFIX PNG_JOIN name-PNG_DEFN_END - -#include "../png.h" diff --git a/extern/libpng/include/scripts/makefile.aix b/extern/libpng/include/scripts/makefile.aix deleted file mode 100644 index bb4c40d4b0..0000000000 --- a/extern/libpng/include/scripts/makefile.aix +++ /dev/null @@ -1,121 +0,0 @@ -# makefile for libpng using gcc (generic, static library) -# Copyright (C) 2002, 2006-2009 Glenn Randers-Pehrson -# Copyright (C) 2000 Cosmin Truta -# Copyright (C) 2000 Marc O. Gloor (AIX support added, from makefile.gcc) -# Copyright (C) 1995 Guy Eric Schalnat, Group 42, Inc. -# -# This code is released under the libpng license. -# For conditions of distribution and use, see the disclaimer -# and license in png.h - -# Location of the zlib library and include files -ZLIBINC = ../zlib -ZLIBLIB = ../zlib - -# Compiler, linker, lib and other tools -CC = gcc -LD = $(CC) -AR_RC = ar rcs -MKDIR_P = mkdir -p -RANLIB = ranlib -RM_F = rm -f -LN_SF = ln -f -s - -LIBNAME=libpng15 -PNGMAJ = 15 - -prefix=/usr/local -INCPATH=$(prefix)/include -LIBPATH=$(prefix)/lib - -# override DESTDIR= on the make install command line to easily support -# installing into a temporary location. Example: -# -# make install DESTDIR=/tmp/build/libpng -# -# If you're going to install into a temporary location -# via DESTDIR, $(DESTDIR)$(prefix) must already exist before -# you execute make install. -DESTDIR= - -DI=$(DESTDIR)$(INCPATH) -DL=$(DESTDIR)$(LIBPATH) - -CDEBUG = -g -DPNG_DEBUG=5 -LDDEBUG = -CRELEASE = -O2 -LDRELEASE = -s -WARNMORE=-W -Wall -CFLAGS = -I$(ZLIBINC) $(WARNMORE) $(CRELEASE) -LDFLAGS = -L. -L$(ZLIBLIB) -lpng15 -lz -lm $(LDRELEASE) - -# File extensions -O=.o -A=.a -E= - -# Variables -OBJS = png$(O) pngerror$(O) pngget$(O) pngmem$(O) pngpread$(O) \ - pngread$(O) pngrio$(O) pngrtran$(O) pngrutil$(O) pngset$(O) \ - pngtrans$(O) pngwio$(O) pngwrite$(O) pngwtran$(O) pngwutil$(O) - -# Targets -all: $(LIBNAME)$(A) pngtest$(E) - -include scripts/pnglibconf.mak -REMOVE = $(RM_F) -DFNFLAGS = $(DEFS) $(CPPFLAGS) - -$(LIBNAME)$(A): $(OBJS) - $(AR_RC) $@ $(OBJS) - $(RANLIB) $@ - -test: pngtest$(E) - ./pngtest$(E) - -pngtest$(E): pngtest$(O) $(LIBNAME)$(A) - $(LD) -o $@ pngtest$(O) $(LDFLAGS) - -install: $(LIBNAME)$(A) - -@if [ ! -d $(DI) ]; then $(MKDIR_P) $(DI); fi - -@if [ ! -d $(DI)/$(LIBNAME) ]; then $(MKDIR_P) $(DI)/$(LIBNAME); fi - -@if [ ! -d $(DL) ]; then $(MKDIR_P) $(DL); fi - -@$(RM_F) $(DI)/$(LIBNAME)/png.h - -@$(RM_F) $(DI)/$(LIBNAME)/pngconf.h - -@$(RM_F) $(DI)/$(LIBNAME)/pnglibconf.h - -@$(RM_F) $(DI)/png.h - -@$(RM_F) $(DI)/pngconf.h - -@$(RM_F) $(DI)/pnglibconf.h - cp png.h pngconf.h pnglibconf.h $(DI)/$(LIBNAME) - chmod 644 $(DI)/$(LIBNAME)/png.h \ - $(DI)/$(LIBNAME)/pngconf.h \ - $(DI)/$(LIBNAME)/pnglibconf.h - -@$(RM_F) -r $(DI)/libpng - (cd $(DI); $(LN_SF) $(LIBNAME) libpng; $(LN_SF) $(LIBNAME)/* .) - -@$(RM_F) $(DL)/$(LIBNAME)$(A) - -@$(RM_F) $(DL)/libpng$(A) - cp $(LIBNAME)$(A) $(DL)/$(LIBNAME)$(A) - chmod 644 $(DL)/$(LIBNAME)$(A) - (cd $(DL); $(LN_SF) $(LIBNAME)$(A) libpng$(A)) - (cd $(DI); $(LN_SF) libpng/* .;) - -clean: - $(RM_F) *.o $(LIBNAME)$(A) pngtest pngout.png pnglibconf.h - -png$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngerror$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngget$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngmem$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngpread$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngread$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngrio$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngrtran$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngrutil$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngset$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngtrans$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngwio$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngwrite$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngwtran$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngwutil$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h - -pngtest$(O): png.h pngconf.h pnglibconf.h diff --git a/extern/libpng/include/scripts/makefile.bor b/extern/libpng/include/scripts/makefile.bor deleted file mode 100644 index 96d5e861a3..0000000000 --- a/extern/libpng/include/scripts/makefile.bor +++ /dev/null @@ -1,161 +0,0 @@ -# Makefile for libpng -# 16-bit Borland C++ (Note: All modules are compiled in C mode) -# To build the library, do: -# "make -fmakefile.bor -DMODEL=c" -# or: "make -fmakefile.bor -DMODEL=l" -# -# ------------ Borland C++ ------------ - -### Absolutely necessary for this makefile to work -.AUTODEPEND - -## Where zlib.h, zconf.h and zlib_MODEL.lib are -ZLIB_DIR=..\zlib - -## Compiler, linker and lib stuff -CC=bcc -LD=bcc -LIB=tlib - -!ifndef MODEL -MODEL=l -!endif - -MODEL_ARG=-m$(MODEL) - -#TARGET_CPU=3 -# 2 = 286, 3 = 386, etc. -!ifndef TARGET_CPU -TARGET_CPU=2 -!endif - -# Use this if you don't want Borland's fancy exception handling -# (for Borland C++ 4.0 or later) -#NOEHLIB=noeh$(MODEL).lib - -!ifdef DEBUG -CDEBUG=-v -LDEBUG=-v -!else -CDEBUG= -LDEBUG= -!endif - -# STACKOFLOW=1 -!ifdef STACKOFLOW -CDEBUG=$(CDEBUG) -N -LDEBUG=$(LDEBUG) -N -!endif - -# -X- turn on dependency generation in the object file -# -w set all warnings on -# -O2 optimize for speed -# -Z global optimization -CFLAGS=-O2 -Z -X- -w -I$(ZLIB_DIR) -$(TARGET_CPU) $(MODEL_ARG) $(CDEBUG) - -# -M generate map file -LDFLAGS=-M -L$(ZLIB_DIR) $(MODEL_ARG) $(LDEBUG) - -## Variables - -OBJS = \ - png.obj \ - pngerror.obj \ - pngget.obj \ - pngmem.obj \ - pngpread.obj \ - pngread.obj \ - pngrio.obj \ - pngrtran.obj \ - pngrutil.obj \ - pngset.obj \ - pngtrans.obj \ - pngwio.obj \ - pngwrite.obj \ - pngwtran.obj \ - pngwutil.obj - -LIBOBJS = \ - +png.obj \ - +pngerror.obj \ - +pngget.obj \ - +pngmem.obj \ - +pngpread.obj \ - +pngread.obj \ - +pngrio.obj \ - +pngrtran.obj \ - +pngrutil.obj \ - +pngset.obj \ - +pngtrans.obj \ - +pngwio.obj \ - +pngwrite.obj \ - +pngwtran.obj \ - +pngwutil.obj - -LIBNAME=libpng$(MODEL).lib - -## Implicit rules - -# Braces let make "batch" calls to the compiler, -# 2 calls instead of 12; space is important. -.c.obj: - $(CC) $(CFLAGS) -c {$*.c } - -.c.exe: - $(CC) $(CFLAGS) $(LDFLAGS) $*.c $(LIBNAME) zlib_$(MODEL).lib $(NOEHLIB) - -## Major targets - -all: libpng pngtest - -# try !inlude scripts\pnglibconf.mak for more options -pnglibconf.h: scripts\pnglibconf.h.prebuilt - copy scripts\pnglibconf.h.prebuilt $@ - -libpng: $(LIBNAME) - -pngtest: pngtest$(MODEL).exe - -test: pngtest$(MODEL).exe - pngtest$(MODEL) - -## Minor Targets - -png.obj: png.c png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngerror.obj: pngerror.c png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngget.obj: pngget.c png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngmem.obj: pngmem.c png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngpread.obj: pngpread.c png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngread.obj: pngread.c png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngrio.obj: pngrio.c png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngrtran.obj: pngrtran.c png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngrutil.obj: pngrutil.c png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngset.obj: pngset.c png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngtrans.obj: pngtrans.c png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngwio.obj: pngwio.c png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngwrite.obj: pngwrite.c png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngwtran.obj: pngwtran.c png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngwutil.obj: pngwutil.c png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h - -$(LIBNAME): $(OBJS) - -del $(LIBNAME) - $(LIB) $(LIBNAME) @&&| -$(LIBOBJS), libpng$(MODEL) -| - -pngtest$(MODEL).obj: pngtest.c png.h pngconf.h pnglibconf.h - $(CC) $(CFLAGS) -opngtest$(MODEL) -c pngtest.c - -pngtest$(MODEL).exe: pngtest$(MODEL).obj - $(LD) $(LDFLAGS) pngtest$(MODEL).obj $(LIBNAME) zlib_$(MODEL).lib $(NOEHLIB) - -# Clean up anything else you want -clean: - -del pnglibconf.h - -del *.obj - -del *.exe - -del *.lib - -del *.lst - -del *.map - -# End of makefile for libpng diff --git a/extern/libpng/include/scripts/makefile.gcc b/extern/libpng/include/scripts/makefile.gcc deleted file mode 100644 index 2e5b611367..0000000000 --- a/extern/libpng/include/scripts/makefile.gcc +++ /dev/null @@ -1,87 +0,0 @@ -# makefile for libpng using gcc (generic, static library) -# Copyright (C) 2008 Glenn Randers-Pehrson -# Copyright (C) 2000 Cosmin Truta -# Copyright (C) 1995 Guy Eric Schalnat, Group 42, Inc. -# -# This code is released under the libpng license. -# For conditions of distribution and use, see the disclaimer -# and license in png.h - -# Location of the zlib library and include files -ZLIBINC = ../zlib -ZLIBLIB = ../zlib - -# Compiler, linker, lib and other tools -CC = gcc -LD = $(CC) -AR_RC = ar rcs -RANLIB = ranlib -RM_F = rm -f - -CDEBUG = -g -DPNG_DEBUG=5 -LDDEBUG = -CRELEASE = -O2 -LDRELEASE = -s -#CFLAGS = -W -Wall $(CDEBUG) -CFLAGS = -W -Wall $(CRELEASE) -#LDFLAGS = $(LDDEBUG) -LDFLAGS = $(LDRELEASE) -LIBS = -lz -lm - -# File extensions -O=.o -A=.a -EXE= - -# Variables -OBJS = png$(O) pngerror$(O) pngget$(O) pngmem$(O) pngpread$(O) \ - pngread$(O) pngrio$(O) pngrtran$(O) pngrutil$(O) pngset$(O) \ - pngtrans$(O) pngwio$(O) pngwrite$(O) pngwtran$(O) pngwutil$(O) - -# Targets -all: static - -# see scripts/pnglibconf.mak for more options -pnglibconf.h: scripts/pnglibconf.h.prebuilt - cp scripts/pnglibconf.h.prebuilt $@ - -.c$(O): - $(CC) -c $(CFLAGS) -I$(ZLIBINC) $< - -static: libpng$(A) pngtest$(EXE) - -shared: - @echo This is a generic makefile that cannot create shared libraries. - @echo Please use a configuration that is specific to your platform. - @false - -libpng$(A): $(OBJS) - $(AR_RC) $@ $(OBJS) - $(RANLIB) $@ - -test: pngtest$(EXE) - ./pngtest$(EXE) - -pngtest$(EXE): pngtest$(O) libpng$(A) - $(LD) $(LDFLAGS) -L$(ZLIBLIB) -o $@ pngtest$(O) libpng$(A) $(LIBS) - -clean: - $(RM_F) *$(O) libpng$(A) pngtest$(EXE) pngout.png pnglibconf.h - -png$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngerror$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngget$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngmem$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngpread$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngread$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngrio$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngrtran$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngrutil$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngset$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngtrans$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngwio$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngwrite$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngwtran$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngwutil$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h - -pngtest$(O): png.h pngconf.h pnglibconf.h diff --git a/extern/libpng/include/scripts/makefile.knr b/extern/libpng/include/scripts/makefile.knr deleted file mode 100644 index 18a39f5375..0000000000 --- a/extern/libpng/include/scripts/makefile.knr +++ /dev/null @@ -1,109 +0,0 @@ -# makefile for libpng -# Copyright (C) 2002, 2006, 2009 Glenn Randers-Pehrson -# Copyright (C) 1995 Guy Eric Schalnat, Group 42, Inc. -# -# This code is released under the libpng license. -# For conditions of distribution and use, see the disclaimer -# and license in png.h -# -# This makefile requires the file ansi2knr.c, which you can get -# from the Ghostscript ftp site at ftp://ftp.cs.wisc.edu/ghost/ -# If you have libjpeg, you probably already have ansi2knr.c in the jpeg -# source distribution. - -# where make install puts libpng.a and png.h -prefix=/usr/local -INCPATH=$(prefix)/include -LIBPATH=$(prefix)/lib - -# override DESTDIR= on the make install command line to easily support -# installing into a temporary location. Example: -# -# make install DESTDIR=/tmp/build/libpng -# -# If you're going to install into a temporary location -# via DESTDIR, $(DESTDIR)$(prefix) must already exist before -# you execute make install. -DESTDIR= - -CC=cc -CFLAGS=-I../zlib -O -LDFLAGS=-L. -L../zlib/ -lpng -lz -lm -# flags for ansi2knr -ANSI2KNRFLAGS= - -RANLIB=ranlib -#RANLIB=echo - -OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \ - pngread.o pngrio.o pngwio.o pngwrite.o pngrtran.o \ - pngwtran.o pngmem.o pngerror.o pngpread.o - -all: ansi2knr libpng.a pngtest - -# see scripts/pnglibconf.mak for more options -pnglibconf.h: scripts/pnglibconf.h.prebuilt - cp scripts/pnglibconf.h.prebuilt $@ - -# general rule to allow ansi2knr to work -.c.o: - ./ansi2knr $*.c T$*.c - $(CC) $(CFLAGS) -c T$*.c - rm -f T$*.c $*.o - mv T$*.o $*.o - -ansi2knr: ansi2knr.c - $(CC) $(CFLAGS) $(ANSI2KNRFLAGS) -o ansi2knr ansi2knr.c - -libpng.a: ansi2knr $(OBJS) - ar rc $@ $(OBJS) - $(RANLIB) $@ - -pngtest: pngtest.o libpng.a - $(CC) -o pngtest $(CFLAGS) pngtest.o $(LDFLAGS) - -test: pngtest - ./pngtest - -install: libpng.a png.h pngconf.h pnglibconf.h - -@mkdir $(DESTDIR)$(INCPATH) - -@mkdir $(DESTDIR)$(INCPATH)/libpng - -@mkdir $(DESTDIR)$(LIBPATH) - -@rm -f $(DESTDIR)$(INCPATH)/png.h - -@rm -f $(DESTDIR)$(INCPATH)/pngconf.h - cp png.h $(DESTDIR)$(INCPATH)/libpng - cp pngconf.h $(DESTDIR)$(INCPATH)/libpng - cp pnglibconf.h $(DESTDIR)$(INCPATH)/libpng - chmod 644 $(DESTDIR)$(INCPATH)/libpng/png.h - chmod 644 $(DESTDIR)$(INCPATH)/libpng/pngconf.h - chmod 644 $(DESTDIR)$(INCPATH)/libpng/pnglibconf.h - (cd $(DESTDIR)$(INCPATH); ln -f -s libpng/* .) - cp libpng.a $(DESTDIR)$(LIBPATH) - chmod 644 $(DESTDIR)$(LIBPATH)/libpng.a - -clean: - rm -f *.o libpng.a pngtest pngout.png ansi2knr pnglibconf.h - -DOCS = ANNOUNCE CHANGES INSTALL KNOWNBUG LICENSE README TODO Y2KINFO -writelock: - chmod a-w *.[ch35] $(DOCS) scripts/* - -# DO NOT DELETE THIS LINE -- make depend depends on it. - -png.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngerror.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngrio.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngwio.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngmem.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngset.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngget.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngread.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngpread.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngrtran.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngrutil.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngtrans.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngwrite.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngwtran.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngwutil.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h - -pngtest.o: png.h pngconf.h pnglibconf.h diff --git a/extern/libpng/include/scripts/makefile.msc b/extern/libpng/include/scripts/makefile.msc deleted file mode 100644 index baa863dad9..0000000000 --- a/extern/libpng/include/scripts/makefile.msc +++ /dev/null @@ -1,95 +0,0 @@ -# makefile for libpng -# Copyright (C) 1995 Guy Eric Schalnat, Group 42, Inc. -# Copyright (C) 2006, 2009 Glenn Randers-Pehrson -# -# This code is released under the libpng license. -# For conditions of distribution and use, see the disclaimer -# and license in png.h -# -# Assumes that zlib.lib, zconf.h, and zlib.h have been copied to ..\zlib - -# -------- Microsoft C 5.1 and later, does not use assembler code -------- -MODEL=L -CFLAGS=-Oait -Gs -nologo -W3 -A$(MODEL) -I..\zlib -#-Ox generates bad code with MSC 5.1 -CC=cl -LD=link -LDFLAGS=/e/st:0x1500/noe -O=.obj - -#uncomment next to put error messages in a file -ERRFILE= >> pngerrs - -# variables -OBJS1 = png$(O) pngset$(O) pngget$(O) pngrutil$(O) pngtrans$(O) pngwutil$(O) -OBJS2 = pngmem$(O) pngpread$(O) pngread$(O) pngerror$(O) pngwrite$(O) -OBJS3 = pngrtran$(O) pngwtran$(O) pngrio$(O) pngwio$(O) - -all: libpng.lib - -# see scripts/pnglibconf.mak for more options -pnglibconf.h: scripts/pnglibconf.h.prebuilt - cp scripts/pnglibconf.h.prebuilt $@ - -png$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h - $(CC) -c $(CFLAGS) $*.c $(ERRFILE) - -pngset$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h - $(CC) -c $(CFLAGS) $*.c $(ERRFILE) - -pngget$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h - $(CC) -c $(CFLAGS) $*.c $(ERRFILE) - -pngread$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h - $(CC) -c $(CFLAGS) $*.c $(ERRFILE) - -pngpread$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h - $(CC) -c $(CFLAGS) $*.c $(ERRFILE) - -pngrtran$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h - $(CC) -c $(CFLAGS) $*.c $(ERRFILE) - -pngrutil$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h - $(CC) -c $(CFLAGS) $*.c $(ERRFILE) - -pngerror$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h - $(CC) -c $(CFLAGS) $*.c $(ERRFILE) - -pngmem$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h - $(CC) -c $(CFLAGS) $*.c $(ERRFILE) - -pngrio$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h - $(CC) -c $(CFLAGS) $*.c $(ERRFILE) - -pngwio$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h - $(CC) -c $(CFLAGS) $*.c $(ERRFILE) - -pngtrans$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h - $(CC) -c $(CFLAGS) $*.c $(ERRFILE) - -pngwrite$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h - $(CC) -c $(CFLAGS) $*.c $(ERRFILE) - -pngwtran$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h - $(CC) -c $(CFLAGS) $*.c $(ERRFILE) - -pngwutil$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h - $(CC) -c $(CFLAGS) $*.c $(ERRFILE) - -libpng.lib: $(OBJS1) $(OBJS2) $(OBJS3) - del libpng.lib - lib libpng $(OBJS1); - lib libpng $(OBJS2); - lib libpng $(OBJS3); - -pngtest$(O): png.h pngconf.h pnglibconf.h - $(CC) -c $(CFLAGS) $*.c $(ERRFILE) - -pngtest.exe: pngtest.obj libpng.lib - $(LD) $(LDFLAGS) pngtest.obj,,,libpng.lib ..\zlib\zlib.lib ; - -test: pngtest.exe - pngtest - -# End of makefile for libpng - diff --git a/extern/libpng/include/scripts/makefile.ne12bsd b/extern/libpng/include/scripts/makefile.ne12bsd deleted file mode 100644 index c447f12034..0000000000 --- a/extern/libpng/include/scripts/makefile.ne12bsd +++ /dev/null @@ -1,50 +0,0 @@ -# makefile for libpng for NetBSD for the standard -# make obj && make depend && make && make test -# make includes && make install -# Copyright (C) 2002 Patrick R.L. Welche -# Copyright (C) 2007, 2009 Glenn Randers-Pehrson -# -# This code is released under the libpng license. -# For conditions of distribution and use, see the disclaimer -# and license in png.h - -# You should also run makefile.netbsd - -LOCALBASE?=/usr/local -LIBDIR= ${LOCALBASE}/lib -MANDIR= ${LOCALBASE}/man -INCSDIR=${LOCALBASE}/include/libpng15 - -LIB= png15 -SHLIB_MAJOR= 0 -SHLIB_MINOR= 1.5.10 -SRCS= png.c pngset.c pngget.c pngrutil.c pngtrans.c pngwutil.c \ - pngread.c pngrio.c pngwio.c pngwrite.c pngrtran.c \ - pngwtran.c pngmem.c pngerror.c pngpread.c -INCS= png.h pngconf.h pnglibconf.h -MAN= libpng.3 libpngpf.3 png.5 - -CPPFLAGS+=-I${.CURDIR} - -# We should be able to do something like this instead of the manual -# uncommenting, but it core dumps for me at the moment: -# .if ${MACHINE_ARCH} == "i386" -# MKLINT= no -# .endif - -CLEANFILES+=pngtest.o pngtest pnglibconf.h - -# see scripts/pnglibconf.mak for more options -pnglibconf.h: scripts/pnglibconf.h.prebuilt - cp scripts/pnglibconf.h.prebuilt $@ - -pngtest.o: pngtest.c - ${CC} -c ${CPPFLAGS} ${CFLAGS} ${.ALLSRC} -o ${.TARGET} - -pngtest: pngtest.o libpng.a - ${CC} ${LDFLAGS} ${.ALLSRC} -o${.TARGET} -lz -lm - -test: pngtest - cd ${.CURDIR} && ${.OBJDIR}/pngtest - -.include diff --git a/extern/libpng/include/scripts/makefile.solaris-x86 b/extern/libpng/include/scripts/makefile.solaris-x86 deleted file mode 100644 index 76467622a8..0000000000 --- a/extern/libpng/include/scripts/makefile.solaris-x86 +++ /dev/null @@ -1,236 +0,0 @@ -# makefile for libpng on Solaris 2.x with gcc -# Copyright (C) 2004, 2006-2008, 2010-2011 Glenn Randers-Pehrson -# Contributed by William L. Sebok, based on makefile.linux -# Copyright (C) 1998 Greg Roelofs -# Copyright (C) 1996, 1997 Andreas Dilger - -# This code is released under the libpng license. -# For conditions of distribution and use, see the disclaimer -# and license in png.h - -# Library name: -LIBNAME = libpng15 -PNGMAJ = 15 - -# Shared library names: -LIBSO=$(LIBNAME).so -LIBSOMAJ=$(LIBNAME).so.$(PNGMAJ) -LIBSOREL=$(LIBSOMAJ).$(RELEASE) -OLDSO=libpng.so - -# Utilities: -AR_RC=ar rc -CC=gcc -MKDIR_P=mkdir -p -LN_SF=ln -f -s -RANLIB=echo -RM_F=/bin/rm -f - -# Where make install puts libpng.a, libpng15.so*, and png.h -prefix=/usr/local -exec_prefix=$(prefix) - -# Where the zlib library and include files are located -# Changing these to ../zlib poses a security risk. If you want -# to have zlib in an adjacent directory, specify the full path instead of "..". -#ZLIBLIB=../zlib -#ZLIBINC=../zlib - -ZLIBLIB=/usr/local/lib -ZLIBINC=/usr/local/include - -WARNMORE=-Wwrite-strings -Wpointer-arith -Wshadow \ - -Wmissing-declarations -Wtraditional -Wcast-align \ - -Wstrict-prototypes -Wmissing-prototypes #-Wconversion -CFLAGS=-I$(ZLIBINC) -W -Wall -O \ - # $(WARNMORE) -g -DPNG_DEBUG=5 -LDFLAGS=-L. -R. -L$(ZLIBLIB) -R$(ZLIBLIB) -lpng15 -lz -lm - -INCPATH=$(prefix)/include -LIBPATH=$(exec_prefix)/lib -MANPATH=$(prefix)/man -BINPATH=$(exec_prefix)/bin - -# override DESTDIR= on the make install command line to easily support -# installing into a temporary location. Example: -# -# make install DESTDIR=/tmp/build/libpng -# -# If you're going to install into a temporary location -# via DESTDIR, $(DESTDIR)$(prefix) must already exist before -# you execute make install. -DESTDIR= - -DB=$(DESTDIR)$(BINPATH) -DI=$(DESTDIR)$(INCPATH) -DL=$(DESTDIR)$(LIBPATH) -DM=$(DESTDIR)$(MANPATH) - -OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \ - pngread.o pngrio.o pngwio.o pngwrite.o pngrtran.o \ - pngwtran.o pngmem.o pngerror.o pngpread.o - -OBJSDLL = $(OBJS:.o=.pic.o) - -.SUFFIXES: .c .o .pic.o - -.c.pic.o: - $(CC) -c $(CFLAGS) -fPIC -o $@ $*.c - -all: libpng.a $(LIBSO) pngtest libpng.pc libpng-config - -# see scripts/pnglibconf.mak for more options -pnglibconf.h: scripts/pnglibconf.h.prebuilt - cp scripts/pnglibconf.h.prebuilt $@ - -libpng.a: $(OBJS) - $(AR_RC) $@ $(OBJS) - $(RANLIB) $@ - -libpng.pc: - cat scripts/libpng.pc.in | sed -e s!@prefix@!$(prefix)! \ - -e s!@exec_prefix@!$(exec_prefix)! \ - -e s!@libdir@!$(LIBPATH)! \ - -e s!@includedir@!$(INCPATH)! \ - -e s!-lpng15!-lpng15\ -lz\ -lm! > libpng.pc - -libpng-config: - ( cat scripts/libpng-config-head.in; \ - echo prefix=\"$(prefix)\"; \ - echo I_opts=\"-I$(INCPATH)/$(LIBNAME)\"; \ - echo cppflags=\""; \ - echo L_opts=\"-L$(LIBPATH)\"; \ - echo R_opts=\"-R$(LIBPATH)\"; \ - echo libs=\"-lpng15 -lz -lm\"; \ - cat scripts/libpng-config-body.in ) > libpng-config - chmod +x libpng-config - -$(LIBSO): $(LIBSOMAJ) - $(LN_SF) $(LIBSOMAJ) $(LIBSO) - -$(LIBSOMAJ): $(OBJSDLL) - @case "`type ld`" in *ucb*) \ - echo; \ - echo '## WARNING:'; \ - echo '## The commands "CC" and "LD" must NOT refer to /usr/ucb/cc'; \ - echo '## and /usr/ucb/ld. If they do, you need to adjust your PATH'; \ - echo '## environment variable to put /usr/ccs/bin ahead of /usr/ucb.'; \ - echo '## The environment variable LD_LIBRARY_PATH should not be set'; \ - echo '## at all. If it is, things are likely to break because of'; \ - echo '## the libucb dependency that is created.'; \ - echo; \ - ;; \ - esac - $(LD) -G -h $(LIBSOMAJ) \ - -o $(LIBSOMAJ) $(OBJSDLL) - -pngtest: pngtest.o $(LIBSO) - $(CC) -o pngtest $(CFLAGS) pngtest.o $(LDFLAGS) - -test: pngtest - ./pngtest - -install-headers: png.h pngconf.h pnglibconf.h - -@if [ ! -d $(DI) ]; then $(MKDIR_P) $(DI); fi - -@if [ ! -d $(DI)/$(LIBNAME) ]; then $(MKDIR_P) $(DI)/$(LIBNAME); fi - cp png.h pngconf.h pnglibconf.h $(DI)/$(LIBNAME) - chmod 644 $(DI)/$(LIBNAME)/png.h $(DI)/$(LIBNAME)/pngconf.h $(DI)/$(LIBNAME)/pnglibconf.h - -@$(RM_F) $(DI)/png.h $(DI)/pngconf.h $(DI)/pnglibconf.h - -@$(RM_F) $(DI)/libpng - (cd $(DI); $(LN_SF) $(LIBNAME) libpng; $(LN_SF) $(LIBNAME)/* .) - -install-static: install-headers libpng.a - -@if [ ! -d $(DL) ]; then $(MKDIR_P) $(DL); fi - cp libpng.a $(DL)/$(LIBNAME).a - chmod 644 $(DL)/$(LIBNAME).a - -@$(RM_F) $(DL)/libpng.a - (cd $(DL); $(LN_SF) $(LIBNAME).a libpng.a) - -install-shared: install-headers $(LIBSOMAJ) libpng.pc - -@if [ ! -d $(DL) ]; then $(MKDIR_P) $(DL); fi - -@$(RM_F) $(DL)/$(LIBSO) - -@$(RM_F) $(DL)/$(LIBSOREL) - -@$(RM_F) $(DL)/$(OLDSO) - cp $(LIBSOMAJ) $(DL)/$(LIBSOREL) - chmod 755 $(DL)/$(LIBSOREL) - (cd $(DL); \ - $(LN_SF) $(LIBSOREL) $(LIBSO); \ - $(LN_SF) $(LIBSO) $(OLDSO)) - -@if [ ! -d $(DL)/pkgconfig ]; then $(MKDIR_P) $(DL)/pkgconfig; fi - -@$(RM_F) $(DL)/pkgconfig/$(LIBNAME).pc - -@$(RM_F) $(DL)/pkgconfig/libpng.pc - cp libpng.pc $(DL)/pkgconfig/$(LIBNAME).pc - chmod 644 $(DL)/pkgconfig/$(LIBNAME).pc - (cd $(DL)/pkgconfig; $(LN_SF) $(LIBNAME).pc libpng.pc) - -install-man: libpng.3 libpngpf.3 png.5 - -@if [ ! -d $(DM) ]; then $(MKDIR_P) $(DM); fi - -@if [ ! -d $(DM)/man3 ]; then $(MKDIR_P) $(DM)/man3; fi - -@$(RM_F) $(DM)/man3/libpng.3 - -@$(RM_F) $(DM)/man3/libpngpf.3 - cp libpng.3 $(DM)/man3 - cp libpngpf.3 $(DM)/man3 - -@if [ ! -d $(DM)/man5 ]; then $(MKDIR_P) $(DM)/man5; fi - -@$(RM_F) $(DM)/man5/png.5 - cp png.5 $(DM)/man5 - -install-config: libpng-config - -@if [ ! -d $(DB) ]; then $(MKDIR_P) $(DB); fi - -@$(RM_F) $(DB)/libpng-config - -@$(RM_F) $(DB)/$(LIBNAME)-config - cp libpng-config $(DB)/$(LIBNAME)-config - chmod 755 $(DB)/$(LIBNAME)-config - (cd $(DB); $(LN_SF) $(LIBNAME)-config libpng-config) - -install: install-static install-shared install-man install-config - -# If you installed in $(DESTDIR), test-installed won't work until you -# move the library to its final location. Use test-dd to test it -# before then. - -test-dd: - echo - echo Testing installed dynamic shared library in $(DL). - $(CC) -I$(DI) -I$(ZLIBINC) \ - `$(BINPATH)/$(LIBNAME)-config --cflags` pngtest.c \ - -o pngtestd `$(BINPATH)/$(LIBNAME)-config --ldflags` \ - -L$(DL) -L$(ZLIBLIB) -R$(ZLIBLIB) -R$(DL) - ./pngtestd pngtest.png - -test-installed: - echo - echo Testing installed dynamic shared library. - $(CC) -I$(ZLIBINC) \ - `$(BINPATH)/$(LIBNAME)-config --cflags` pngtest.c \ - -o pngtesti `$(BINPATH)/$(LIBNAME)-config --ldflags` \ - -L$(ZLIBLIB) -R$(ZLIBLIB) - ./pngtesti pngtest.png - -clean: - $(RM_F) *.o libpng.a pngtest pngtesti pngout.png \ - libpng-config $(LIBSO) $(LIBSOMAJ)* \ - libpng.pc pnglibconf.h - -DOCS = ANNOUNCE CHANGES INSTALL KNOWNBUG LICENSE README TODO Y2KINFO -writelock: - chmod a-w *.[ch35] $(DOCS) scripts/* - -# DO NOT DELETE THIS LINE -- make depend depends on it. - -png.o png.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngerror.o pngerror.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngrio.o pngrio.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngwio.o pngwio.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngmem.o pngmem.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngset.o pngset.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngget.o pngget.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngread.o pngread.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngrtran.o pngrtran.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngrutil.o pngrutil.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngtrans.o pngtrans.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngwrite.o pngwrite.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngwtran.o pngwtran.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngwutil.o pngwutil.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h -pngpread.o pngpread.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h - -pngtest.o: png.h pngconf.h pnglibconf.h diff --git a/extern/libpng/include/scripts/makefile.tc3 b/extern/libpng/include/scripts/makefile.tc3 deleted file mode 100644 index 462c47fece..0000000000 --- a/extern/libpng/include/scripts/makefile.tc3 +++ /dev/null @@ -1,93 +0,0 @@ -# Makefile for libpng -# TurboC/C++ (Note: All modules are compiled in C mode) - -# To use, do "make -fmakefile.tc3" - -# ----- Turbo C 3.00 (can be modified to work with earlier versions) ----- - -MODEL=l -CFLAGS=-O2 -Z -m$(MODEL) -I..\zlib -#CFLAGS=-D_NO_PROTO -O2 -Z -m$(MODEL) -I..\zlib # Turbo C older than 3.00 -CC=tcc -LD=tcc -LIB=tlib -LDFLAGS=-m$(MODEL) -L..\zlib -O=.obj -E=.exe - -# variables -OBJS1 = png$(O) pngset$(O) pngget$(O) pngrutil$(O) pngtrans$(O) pngwutil$(O) -OBJS2 = pngmem$(O) pngpread$(O) pngread$(O) pngerror$(O) pngwrite$(O) -OBJS3 = pngrtran$(O) pngwtran$(O) pngrio$(O) pngwio$(O) -OBJSL1 = +png$(O) +pngset$(O) +pngget$(O) +pngrutil$(O) +pngtrans$(O) -OBJSL2 = +pngwutil$(O) +pngmem$(O) +pngpread$(O) +pngread$(O) +pngerror$(O) -OBJSL3 = +pngwrite$(O) +pngrtran$(O) +pngwtran$(O) +pngrio$(O) +pngwio$(O) - -all: libpng$(MODEL).lib pngtest$(E) - -# see scripts/pnglibconf.mak for more options -pnglibconf.h: scripts/pnglibconf.h.prebuilt - cp scripts/pnglibconf.h.prebuilt $@ - -pngtest: pngtest$(E) - -test: pngtest$(E) - pngtest$(E) - -png$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h - $(CC) -c $(CFLAGS) $*.c - -pngset$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h - $(CC) -c $(CFLAGS) $*.c - -pngget$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h - $(CC) -c $(CFLAGS) $*.c - -pngread$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h - $(CC) -c $(CFLAGS) $*.c - -pngpread$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h - $(CC) -c $(CFLAGS) $*.c - -pngrtran$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h - $(CC) -c $(CFLAGS) $*.c - -pngrutil$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h - $(CC) -c $(CFLAGS) $*.c - -pngerror$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h - $(CC) -c $(CFLAGS) $*.c - -pngmem$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h - $(CC) -c $(CFLAGS) $*.c - -pngrio$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h - $(CC) -c $(CFLAGS) $*.c - -pngwio$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h - $(CC) -c $(CFLAGS) $*.c - -pngtest$(O): png.h pngconf.h pnglibconf.h - $(CC) -c $(CFLAGS) $*.c - -pngtrans$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h - $(CC) -c $(CFLAGS) $*.c - -pngwrite$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h - $(CC) -c $(CFLAGS) $*.c - -pngwtran$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h - $(CC) -c $(CFLAGS) $*.c - -pngwutil$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h - $(CC) -c $(CFLAGS) $*.c - -libpng$(MODEL).lib: $(OBJS1) $(OBJS2) $(OBJS3) - $(LIB) libpng$(MODEL) +$(OBJSL1) - $(LIB) libpng$(MODEL) +$(OBJSL2) - $(LIB) libpng$(MODEL) +$(OBJSL3) - -pngtest$(E): pngtest$(O) libpng$(MODEL).lib - $(LD) $(LDFLAGS) pngtest.obj libpng$(MODEL).lib zlib_$(MODEL).lib - -# End of makefile for libpng diff --git a/extern/libpng/include/scripts/pnglibconf.dfa b/extern/libpng/include/scripts/pnglibconf.dfa deleted file mode 100644 index f06eb66857..0000000000 --- a/extern/libpng/include/scripts/pnglibconf.dfa +++ /dev/null @@ -1,590 +0,0 @@ -# scripts/pnglibconf.dfa - library build configuration control -# -@/*- pnglibconf.dfn intermediate file -@ * generated from scripts/pnglibconf.dfa -@ */ -# -com pnglibconf.h - library build configuration -com -version -com -com Copyright (c) 1998-2011 Glenn Randers-Pehrson -com -com This code is released under the libpng license. -com For conditions of distribution and use, see the disclaimer -com and license in png.h -com - -file pnglibconf.h scripts/pnglibconf.dfa PNGLCONF_H - -# This file is preprocessed by scripts/options.awk and the -# C compiler to generate 'pnglibconf.h' - a list of all the -# configuration options. The file lists the various options -# that can *only* be specified during the libpng build; -# pnglibconf.h freezes the definitons selected for the specific -# build. -# -# The syntax is detailed in scripts/options.awk, this is a summary -# only: -# -# setting [default] -# #define PNG_ /* value comes from current setting */ -# option [requires ...] [if ...] [enables ...] [disabled] -# #define PNG__SUPPORTED if the requirements are met and -# enable the other options listed -# chunk [requires ...] [disabled] -# Enable chunk processing for the given ancillary chunk -# -# Note that the 'on' and 'off' keywords, while valid on both option -# and chunk, should not be used in this file because they force the -# relevant options on or off. - -#---------------------------------------------------------------------- - -# The following setting, option and chunk values can all be changed -# while building libpng: -# -# setting: change 'setting' lines to fine tune library performance, -# changes to the settings don't affect the libpng API functionally -# -# option: change 'option' lines to remove or add capabilities from -# or to the library; options change the library API -# -# chunk: change 'chunk' lines to remove capabilities to process -# optional ('ancillary') chunks. This does not prevent PNG -# decoding but does change the libpng API because some chunks -# will be ignored. -# -# There are three ways of disabling features, in no particular order: -# -# 1) Create 'pngusr.h', enter the required private build information -# detailed below and #define PNG_NO_