Xtool -mpng+reflate _verified_ Official

def read_chunk(f): """Read PNG chunk: length, type, data, crc""" len_data = struct.unpack('>I', f.read(4))[0] chunk_type = f.read(4) data = f.read(len_data) crc = struct.unpack('>I', f.read(4))[0] return chunk_type, data, crc

if chunk_type == CHUNK_TYPE_IEND: break def mpng_reflate_cli(args): input_png = args.input output_png = args.output or input_png.replace('.png', '_reflated.png') level = args.recompress_level or 6 extract_only = args.extract_only replace_data = args.replace xtool -mpng+reflate

def rebuild_png_with_mpng(input_path, output_path, streams, recompress_level=6, replace_map=None): """Rebuild PNG with modified MPNG streams""" with open(input_path, 'rb') as fin, open(output_path, 'wb') as fout: fout.write(fin.read(8)) # PNG signature def read_chunk(f): """Read PNG chunk: length, type, data,