PNG_INFO_hIST     493 3rdparty/libpng/png.c       info_ptr->valid &= ~PNG_INFO_hIST;
PNG_INFO_hIST     724 3rdparty/libpng/pngget.c    if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_hIST)
PNG_INFO_hIST     728 3rdparty/libpng/pngget.c       return (PNG_INFO_hIST);
PNG_INFO_hIST    1792 3rdparty/libpng/pngrutil.c    else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_hIST))
PNG_INFO_hIST     213 3rdparty/libpng/pngset.c    info_ptr->valid |= PNG_INFO_hIST;
PNG_INFO_hIST     166 3rdparty/libpng/pngwrite.c    if (info_ptr->valid & PNG_INFO_hIST)