PNG_ALL_FILTERS  1039 3rdparty/libpng/pngwrite.c       switch (filters & (PNG_ALL_FILTERS | 0x07))
PNG_ALL_FILTERS   836 3rdparty/libpng/pngwutil.c          png_ptr->do_filter = PNG_ALL_FILTERS;
PNG_ALL_FILTERS  2439 3rdparty/libpng/pngwutil.c   if (png_ptr->row_number == 0 && filter_to_do == PNG_ALL_FILTERS)