PNG_FILTER_NONE  1626 3rdparty/libpng/png.h #define PNG_ALL_FILTERS (PNG_FILTER_NONE | PNG_FILTER_SUB | PNG_FILTER_UP | \
PNG_FILTER_NONE  1047 3rdparty/libpng/pngwrite.c             png_ptr->do_filter = PNG_FILTER_NONE; break;
PNG_FILTER_NONE  1142 3rdparty/libpng/pngwrite.c             png_ptr->do_filter = PNG_FILTER_NONE;
PNG_FILTER_NONE   833 3rdparty/libpng/pngwutil.c          png_ptr->do_filter = PNG_FILTER_NONE;
PNG_FILTER_NONE   841 3rdparty/libpng/pngwutil.c       if (png_ptr->do_filter != PNG_FILTER_NONE)
PNG_FILTER_NONE  2484 3rdparty/libpng/pngwutil.c    if ((filter_to_do & PNG_FILTER_NONE) && filter_to_do != PNG_FILTER_NONE)