PNG_CMAP_RGB     2721 pngread.c                           output_processing = PNG_CMAP_RGB;
PNG_CMAP_RGB     2735 pngread.c                     output_processing = PNG_CMAP_RGB;
PNG_CMAP_RGB     2857 pngread.c            case PNG_CMAP_RGB:
PNG_CMAP_RGB     3001 pngread.c                     case PNG_CMAP_RGB:
PNG_CMAP_RGB     3120 pngread.c            case PNG_CMAP_RGB: