png_rw_ptr_NULL   179 third_party/libpng/pngread.c    png_set_read_fn(png_ptr, png_voidp_NULL, png_rw_ptr_NULL);
png_rw_ptr_NULL   341 third_party/libpng/pngread.c    png_set_read_fn(png_ptr, png_voidp_NULL, png_rw_ptr_NULL);
png_rw_ptr_NULL   576 third_party/libpng/pngwrite.c    png_set_write_fn(png_ptr, png_voidp_NULL, png_rw_ptr_NULL,
png_rw_ptr_NULL   718 third_party/libpng/pngwrite.c    png_set_write_fn(png_ptr, png_voidp_NULL, png_rw_ptr_NULL,