96 lines
3.2 KiB
Python
96 lines
3.2 KiB
Python
#!/usr/bin/env python3
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# requires Pillow and zstandard for Python
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# on msys, install Pillow with
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# pacman -S mingw-w64-x86_64-python-pillow
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# zstd needs to be compiled, because the one in pip3 fails to do so:
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# pacman -S mingw-w64-x86_64-python-setuptools mingw-w64-x86_64-zstd
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# git clone https://github.com/indygreg/python-zstandard.git --recursive && cd python-zstandard
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# python setup.py build_ext --external clean
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# run like this:
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# ./unpak.py pakfile.pak outdir tools/default_crcmap.txt
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# any files not found in crcmap will go to the "nonmatching" folder
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import os
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import sys
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import zstd
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import struct
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from PIL import Image
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PAK_MAGIC = b'\x11\xde\x37\x10\x68\x75\xb6\xe8'
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if len(sys.argv) < 3:
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print('usage: unpak <input.pak> <outdir> [<crcmap>]')
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sys.exit(1)
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pakfname = sys.argv[1]
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outpath = sys.argv[2]
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mapfname = "crcmap.txt"
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if len(sys.argv) > 3:
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mapfname = sys.argv[3]
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# load the CRC map
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crcmap = dict()
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try:
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with open(mapfname, 'r') as f:
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for line in f:
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line = line.strip()
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if line == '' or line[0] == '#':
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continue
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tok = line.split(',')
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crcstr = tok[0].strip()
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if crcstr.startswith('0x'):
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crc = int(crcstr[2:], 16)
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else:
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crc = int(crcstr)
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path = os.path.join(outpath, tok[1].strip())
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if crc in crcmap:
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crcmap[crc].append(path)
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else:
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crcmap[crc] = [path]
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except OSError as e:
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print('could not open {0}: {1}'.format(mapfname, e))
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sys.exit(2)
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except ValueError as e:
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print('invalid integer in {0}: {1}'.format(mapfname, e))
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sys.exit(2)
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unmatchdir = os.path.join(outpath, "nonmatching")
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if not os.path.exists(unmatchdir):
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os.makedirs(unmatchdir)
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# read the PAK
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try:
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texlist = []
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with open(pakfname, "rb") as f:
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magic = f.read(len(PAK_MAGIC))
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if magic != PAK_MAGIC:
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print('invalid magic in PAK ' + pakfname)
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sys.exit(3)
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texcount = int.from_bytes(f.read(8), byteorder='little')
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print('reading {0} textures from {1}'.format(texcount, pakfname))
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for i in range(texcount):
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crc = int.from_bytes(f.read(4), byteorder='little')
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size = int.from_bytes(f.read(4), byteorder='little')
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offset = int.from_bytes(f.read(8), byteorder='little')
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width = int.from_bytes(f.read(8), byteorder='little')
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height = int.from_bytes(f.read(8), byteorder='little')
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texlist.append((crc, size, offset, width, height))
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for (crc, size, ofs, w, h) in texlist:
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f.seek(ofs)
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data = f.read(size)
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img = Image.frombytes('RGBA', (w, h), zstd.decompress(data))
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if crc in crcmap:
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for path in crcmap[crc]:
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[fpath, fname] = os.path.split(path)
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if not os.path.exists(fpath):
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os.makedirs(fpath)
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img.save(path)
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else:
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print('unknown crc: {0:08x}'.format(crc))
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path = os.path.join(unmatchdir, "{0:08x}.png".format(crc))
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img.save(path)
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except OSError as e:
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print('could not open {0}: {1}'.format(pakfname, e))
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sys.exit(3)
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