png_set_filter_heuristics  384 third_party/libpng/pngusr.h #define png_set_filter_heuristics       wk_png_set_filter_heuristics
png_set_filter_heuristics 1300 third_party/libpng/pngwrite.c png_set_filter_heuristics(png_structp png_ptr, int heuristic_method,