PNG_QUANTIZE      390 3rdparty/libpng/pngrtran.c    png_ptr->transformations |= PNG_QUANTIZE;
PNG_QUANTIZE     1986 3rdparty/libpng/pngrtran.c    if (png_ptr->transformations & PNG_QUANTIZE)
PNG_QUANTIZE     2259 3rdparty/libpng/pngrtran.c    if (png_ptr->transformations & PNG_QUANTIZE)