Glenn Maynard
370 lines
12 KiB
C++
370 lines
12 KiB
C++
#include "global.h"
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/*
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-----------------------------------------------------------------------------
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Class: RageBitmapTexture
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Desc: Holder for a static texture with metadata. Can load just about any image format.
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Copyright (c) 2001-2002 by the person(s) listed below. All rights reserved.
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Glenn Maynard
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Chris Danford
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-----------------------------------------------------------------------------
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*/
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#include "RageBitmapTexture.h"
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#include "RageUtil.h"
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#include "RageLog.h"
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#include "RageTextureManager.h"
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#include "RageException.h"
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#include "RageDisplay.h"
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#include "RageTypes.h"
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#include "StepMania.h" // yuck. Needed for HOOKS.
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#include "SDL.h"
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#include "SDL_image.h"
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#include "SDL_endian.h"
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#include "SDL_rotozoom.h"
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#include "SDL_utils.h"
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#include "SDL_dither.h"
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#include "RageTimer.h"
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static void GetResolutionFromFileName( CString sPath, int &Width, int &Height )
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{
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/* Match:
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* Foo (res 512x128).png
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* Also allow, eg:
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* Foo (dither, res 512x128).png
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*
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* Be careful that this doesn't get mixed up with frame dimensions. */
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Regex re("\\([^\\)]*res ([0-9]+)x([0-9]+).*\\)");
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vector<CString> matches;
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if(!re.Compare(sPath, matches))
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return;
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Width = atoi(matches[0].c_str());
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Height = atoi(matches[1].c_str());
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}
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//-----------------------------------------------------------------------------
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// RageBitmapTexture constructor
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//-----------------------------------------------------------------------------
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RageBitmapTexture::RageBitmapTexture( RageTextureID name ) :
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RageTexture( name )
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{
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// LOG->Trace( "RageBitmapTexture::RageBitmapTexture()" );
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Create();
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}
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RageBitmapTexture::~RageBitmapTexture()
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{
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Destroy();
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}
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void RageBitmapTexture::Reload()
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{
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Destroy();
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Create();
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}
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/*
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* Each dwMaxSize, dwTextureColorDepth and iAlphaBits are maximums; we may
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* use less. iAlphaBits must be 0, 1 or 4.
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*
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* XXX: change iAlphaBits == 4 to iAlphaBits == 8 to indicate "as much alpha
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* as needed", since that's what it really is; still only use 4 in 16-bit textures.
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*
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* Dither forces dithering when loading 16-bit textures.
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* Stretch forces the loaded image to fill the texture completely.
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*/
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void RageBitmapTexture::Create()
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{
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RageTextureID actualID = GetID();
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/* Create (and return) a surface ready to be loaded to OpenGL */
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/* Load the image into an SDL surface. */
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SDL_Surface *img = IMG_Load( GetID().filename );
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/* XXX: Wait, we don't want to throw for all images; in particular, we
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* want to tolerate corrupt/unknown background images. */
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if(img == NULL)
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RageException::Throw( "RageBitmapTexture: Couldn't load %s: %s", GetID().filename.c_str(), SDL_GetError() );
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if(actualID.bHotPinkColorKey)
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{
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// HACK: Some Pump banners and DDR PC textures have (248,0,248) as the color key.
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// Search the edge for (248,0,248). If we find it, use that as the color key.
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// TODO: Get rid of this hack and save DDR PC textures in a format that supports alpha.
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bool bUse248 = false;
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{
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const Uint8 *p = (Uint8*)img->pixels;
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for( int i=0; i<img->w; i++ )
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{
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Uint8 color[4];
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mySDL_GetRGBAV( p, img, color );
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if( color[0]==248 && color[1]==0 && color[2]==248 )
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{
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bUse248 = true;
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goto apply_color_key;
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}
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p += img->format->BytesPerPixel;
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}
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}
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{
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const Uint8 *p = (Uint8*)img->pixels;
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p += img->pitch * (img->h-1);
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for( int i=0; i<img->w; i++ )
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{
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Uint8 color[4];
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mySDL_GetRGBAV( p, img, color );
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if( color[0]==248 && color[1]==0 && color[2]==248 )
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{
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bUse248 = true;
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goto apply_color_key;
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}
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p += img->format->BytesPerPixel;
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}
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}
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apply_color_key:
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int color = mySDL_MapRGBExact(img->format, bUse248 ? 248 : 0xFF, 0, bUse248 ? 248 : 0xFF);
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if( color != -1 )
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SDL_SetColorKey( img, SDL_SRCCOLORKEY, color );
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}
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{
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/* This should eventually obsolete 8alphaonly, 0alpha and 1alpha,
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* and remove the need to special case background loads. Do this
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* after setting the color key for paletted images; it'll also return
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* TRAIT_NO_TRANSPARENCY if the color key is never used. */
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int traits = FindSurfaceTraits(img);
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if(traits & TRAIT_NO_TRANSPARENCY)
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actualID.iAlphaBits = 0;
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else if(traits & TRAIT_BOOL_TRANSPARENCY)
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actualID.iAlphaBits = 1;
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if(traits & TRAIT_WHITE_ONLY)
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actualID.iTransparencyOnly = 8;
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}
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// look in the file name for a format hints
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CString HintString = GetID().filename;
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HintString.MakeLower();
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if( HintString.Find("4alphaonly") != -1 ) actualID.iTransparencyOnly = 4;
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else if( HintString.Find("8alphaonly") != -1 ) actualID.iTransparencyOnly = 8;
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if( HintString.Find("dither") != -1 ) actualID.bDither = true;
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if( HintString.Find("stretch") != -1 ) actualID.bStretch = true;
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if( actualID.iTransparencyOnly )
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actualID.iColorDepth = 32; /* Treat the image as 32-bit, so we don't lose any alpha precision. */
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/* Cap the max texture size to the hardware max. */
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actualID.iMaxSize = min( actualID.iMaxSize, DISPLAY->GetMaxTextureSize() );
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/* Save information about the source. */
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m_iSourceWidth = img->w;
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m_iSourceHeight = img->h;
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/* image size cannot exceed max size */
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m_iImageWidth = min( m_iSourceWidth, actualID.iMaxSize );
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m_iImageHeight = min( m_iSourceHeight, actualID.iMaxSize );
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/* Texture dimensions need to be a power of two; jump to the next. */
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m_iTextureWidth = power_of_two(m_iImageWidth);
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m_iTextureHeight = power_of_two(m_iImageHeight);
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/* If we're under 8x8, increase it, to avoid filtering problems on odd hardware. */
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if(m_iTextureWidth < 8 || m_iTextureHeight < 8)
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{
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actualID.bStretch = true;
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m_iTextureWidth = max(8, m_iTextureWidth);
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m_iTextureHeight = max(8, m_iTextureHeight);
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}
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ASSERT( m_iTextureWidth <= actualID.iMaxSize );
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ASSERT( m_iTextureHeight <= actualID.iMaxSize );
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if(actualID.bStretch)
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{
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/* The hints asked for the image to be stretched to the texture size,
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* probably for tiling. */
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m_iImageWidth = m_iTextureWidth;
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m_iImageHeight = m_iTextureHeight;
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}
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if( img->w != m_iImageWidth || img->h != m_iImageHeight )
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{
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/* resize currently only does RGBA8888 */
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ConvertSDLSurface(img, img->w, img->h, 32, 0x000000FF, 0x0000FF00, 0x00FF0000, 0xFF000000);
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zoomSurface(img, m_iImageWidth, m_iImageHeight );
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}
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// Format of the image that we will pass to OpenGL and that we want OpenGL to use
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PixelFormat pixfmt;
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/* Figure out which texture format to use. */
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// if the source is palleted, load palleted no matter what the prefs
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if(img->format->BitsPerPixel == 8 && DISPLAY->SupportsTextureFormat(FMT_PAL))
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{
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pixfmt = FMT_PAL;
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}
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else
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{
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// not paletted
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switch( actualID.iColorDepth )
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{
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case 16:
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{
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/* Bits of alpha in the source: */
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int src_alpha_bits = 8 - img->format->Aloss;
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/* No real alpha in paletted input. */
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if( img->format->BytesPerPixel == 1 )
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src_alpha_bits = 0;
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/* Colorkeyed input effectively has at least one bit of alpha: */
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if( img->flags & SDL_SRCCOLORKEY )
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src_alpha_bits = max( 1, src_alpha_bits );
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/* Don't use more than we were hinted to. */
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src_alpha_bits = min( actualID.iAlphaBits, src_alpha_bits );
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switch( src_alpha_bits ) {
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case 0:
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case 1:
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pixfmt = FMT_RGB5A1;
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break;
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default:
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pixfmt = FMT_RGBA4;
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break;
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}
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}
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break;
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case 32:
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pixfmt = FMT_RGBA8;
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break;
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default:
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RageException::Throw( "Invalid color depth: %d bits", actualID.iColorDepth );
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}
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/* Override the internalformat with an alpha format if it was requested.
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* Don't use iTransparencyOnly with paletted images; there's no point--paletted
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* images are as small or smaller (and the load will fail). */
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/* SDL surfaces don't allow for 8 bpp surfaces that aren't paletted. Arg!
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* fix this later. -Chris */
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// if(actualID.iTransparencyOnly > 0)
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// {
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// imagePixfmt = FMT_ALPHA8;
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// texturePixfmt = FMT_ALPHA8;
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// }
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/* It's either not a paletted image, or we can't handle paletted textures.
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* Convert to the desired RGBA format, dithering if appropriate. */
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if( actualID.bDither &&
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(pixfmt==FMT_RGBA4 || pixfmt==FMT_RGB5A1) ) /* Don't dither if format is 32bpp; there's no point. */
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{
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/* Dither down to the destination format. */
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const PixelFormatDesc *pfd = DISPLAY->GetPixelFormatDesc(pixfmt);
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SDL_Surface *dst = SDL_CreateRGBSurfaceSane(SDL_SWSURFACE, img->w, img->h,
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pfd->bpp, pfd->masks[0], pfd->masks[1], pfd->masks[2], pfd->masks[3]);
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SM_SDL_ErrorDiffusionDither(img, dst);
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SDL_FreeSurface(img);
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img = dst;
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}
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}
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/* This needs to be done *after* the final resize, since that resize
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* may introduce new alpha bits that need to be set. It needs to be
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* done *before* we set up the palette, since it might change it. */
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FixHiddenAlpha(img);
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/* Make we're using a supported format.
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* Every card supports either RGBA8 or RGBA4. */
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if( !DISPLAY->SupportsTextureFormat(pixfmt) )
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{
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pixfmt = FMT_RGBA8;
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if( !DISPLAY->SupportsTextureFormat(pixfmt) )
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pixfmt = FMT_RGBA4;
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}
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/* Convert the data to the destination format and dimensions
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* required by OpenGL if it's not in it already. */
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const PixelFormatDesc *pfd = DISPLAY->GetPixelFormatDesc(pixfmt);
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ConvertSDLSurface(img, m_iTextureWidth, m_iTextureHeight,
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pfd->bpp, pfd->masks[0], pfd->masks[1], pfd->masks[2], pfd->masks[3]);
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m_uTexHandle = DISPLAY->CreateTexture( pixfmt, img );
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CreateFrameRects();
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//
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// Enforce frames in the image have even dimensions. Otherwise,
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// pixel/texel alignment will be off.
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//
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bool bRunCheck = true;
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// Don't check if the artist intentionally blanked the image by making it very tiny.
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if( this->GetSourceWidth()<=2 || this->GetSourceHeight()<=2 )
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bRunCheck = false;
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// HACK: Don't check song graphics. Many of them are weird dimensions.
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if( !TEXTUREMAN->GetOddDimensionWarning() )
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bRunCheck = false;
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if( bRunCheck )
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{
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float fFrameWidth = this->GetSourceWidth() / (float)this->GetFramesWide();
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float fFrameHeight = this->GetSourceHeight() / (float)this->GetFramesHigh();
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float fBetterFrameWidth = roundf((fFrameWidth+0.99f)/2)*2;
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float fBetterFrameHeight = roundf((fFrameHeight+0.99f)/2)*2;
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float fBetterSourceWidth = this->GetFramesWide() * fBetterFrameWidth;
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float fBetterSourceHeight = this->GetFramesHigh() * fBetterFrameHeight;
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if( fFrameWidth!=fBetterFrameWidth || fFrameHeight!=fBetterFrameHeight )
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{
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CString sWarning = ssprintf(
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"The graphic '%s' has frame dimensions that aren't even numbers.\n\n"
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"The entire image is %dx%d and frame size is %.1fx%.1f.\n\n"
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"Image quality will be much improved if you resize the graphic to %.0fx%.0f, which is a frame size of %.0fx%.0f.",
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actualID.filename.c_str(),
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this->GetSourceWidth(), this->GetSourceHeight(),
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fFrameWidth, fFrameHeight,
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fBetterSourceWidth, fBetterSourceHeight,
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fBetterFrameWidth, fBetterFrameHeight );
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LOG->Warn( sWarning );
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if( DISPLAY->IsWindowed() )
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HOOKS->MessageBoxOK( sWarning, "FRAME_DIMENSIONS_WARNING" );
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}
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}
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SDL_FreeSurface( img );
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/* See if the apparent "size" is being overridden. */
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GetResolutionFromFileName(actualID.filename, m_iSourceWidth, m_iSourceHeight);
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CString props;
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props += PixelFormatToString( pixfmt ) + " ";
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if(actualID.iAlphaBits == 0) props += "opaque ";
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if(actualID.iAlphaBits == 1) props += "matte ";
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if(actualID.iTransparencyOnly) props += "mask ";
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if(actualID.bStretch) props += "stretch ";
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if(actualID.bDither) props += "dither ";
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props.erase(props.size()-1);
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LOG->Trace( "RageBitmapTexture: Loaded '%s' (%ux%u); %s, source %d,%d; image %d,%d.",
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actualID.filename.c_str(), GetTextureWidth(), GetTextureHeight(),
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props.c_str(), m_iSourceWidth, m_iSourceHeight,
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m_iImageWidth, m_iImageHeight);
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}
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void RageBitmapTexture::Destroy()
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{
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DISPLAY->DeleteTexture( m_uTexHandle );
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}
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