Verify /characte/*.nc2, *.bcr, *.wcr, *.mar, *.rcr in TWG

chkspr3.py

# -*- coding: utf-8 -*-

# .nc2, .bcr, .wcr, .mar, .rcr

import argparse
import struct
import os

parser = argparse.ArgumentParser(description='Verify sprite file.')
parser.add_argument('-f', required=True, help='sprite file', dest='spr')
args = parser.parse_args()

bn = os.path.basename(args.spr)
ext = os.path.splitext(bn)
ext = ext[1]

kind = 0

if ".nc2" == ext:
  kind = 0
elif ".bcr" == ext or ".wcr" == ext or ".mar" == ext:
  kind = 1
elif ".rcr" == ext:
  kind = 2
else:
  assert False, "can not recognize format"

with open(args.spr, 'rb') as f:
  f.seek(0, os.SEEK_END)
  file_len = f.tell()
  f.seek(0, os.SEEK_SET)

  bytes = f.read(0x40)
  assert 'New Fast&Compress Sprite Ver3.0 for 13h mode!!!. SOFTMAX(C)1994.' == bytes

  f.seek(2, os.SEEK_CUR)

  # unknown
  f.read(2)

  # zero padding
  f.seek(60, os.SEEK_CUR)

  if 0 == kind:
    bytes = f.read(1)
    bytes = struct.unpack('<B', bytes)
    i = bytes[0]
    
    if 0 != i:
      for i in range(4):
        for j in range(2):
          f.read(1)
          f.read(1)
          f.read(1)
          f.read(1)
          f.read(1)

  i = 0
  while 44 > i:
    bytes = f.read(4)
    bytes = struct.unpack('<I', bytes)
    len = bytes[0]

    f.read(1)
    f.seek(1, os.SEEK_CUR)
    f.read(1)
    f.seek(1, os.SEEK_CUR)
    f.read(1)
    f.seek(1, os.SEEK_CUR)
    f.read(1)
    f.seek(1, os.SEEK_CUR)

    if 2 > kind:
      f.read(1)
      f.read(1)

      if 1 == kind:
        f.read(1)
        f.read(1)
        f.read(1)

    f.read(len)

    if 0 < kind:
      tmp = ((i + 1) % 11) % 8
      if 0 == tmp:
        i = i + 3

    i = i + 1

  assert f.tell() == file_len