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"
)

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"
)

source_group("" FILES ${PNG_SRC})
source_group("" FILES ${PNG_HPP})

add_library("png" STATIC ${PNG_SRC} ${PNG_HPP})

set_property(TARGET "png" PROPERTY FOLDER "External Libraries")

disable_project_warnings("png")

if(MSVC)
  sm_add_compile_definition("png" _CRT_SECURE_NO_WARNINGS)
endif()

target_include_directories("png" PUBLIC "zlib")