png_set_read_fn  2064 third_party/libpng/png.h extern PNG_EXPORT(void,png_set_read_fn) PNGARG((png_structp png_ptr,
png_set_read_fn  1763 third_party/libpng/pngpread.c    png_set_read_fn(png_ptr, progressive_ptr, png_push_fill_buffer);
png_set_read_fn   179 third_party/libpng/pngread.c    png_set_read_fn(png_ptr, png_voidp_NULL, png_rw_ptr_NULL);
png_set_read_fn   341 third_party/libpng/pngread.c    png_set_read_fn(png_ptr, png_voidp_NULL, png_rw_ptr_NULL);