PNG_BACKGROUND_GAMMA_FILE  337 3rdparty/libpng/pngrtran.c       png_ptr->background_gamma_type = PNG_BACKGROUND_GAMMA_FILE;
PNG_BACKGROUND_GAMMA_FILE 1556 3rdparty/libpng/pngrtran.c             if (png_ptr->background_gamma_type == PNG_BACKGROUND_GAMMA_FILE)
PNG_BACKGROUND_GAMMA_FILE 1578 3rdparty/libpng/pngrtran.c                   case PNG_BACKGROUND_GAMMA_FILE:
PNG_BACKGROUND_GAMMA_FILE 1687 3rdparty/libpng/pngrtran.c                case PNG_BACKGROUND_GAMMA_FILE: