PNG_BACKGROUND_GAMMA_SCREEN 1573 3rdparty/libpng/pngrtran.c                   case PNG_BACKGROUND_GAMMA_SCREEN:
PNG_BACKGROUND_GAMMA_SCREEN 1682 3rdparty/libpng/pngrtran.c                case PNG_BACKGROUND_GAMMA_SCREEN:
PNG_BACKGROUND_GAMMA_SCREEN 1754 3rdparty/libpng/pngrtran.c             png_ptr->background_gamma_type = PNG_BACKGROUND_GAMMA_SCREEN;