127 lines
5 KiB
Python
127 lines
5 KiB
Python
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#!/usr/bin/env python
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# http://aethra-cronicles-remake.googlecode.com/svn-history/r4/trunk/export/sergroj/RSDef.pas
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# vcmi/client/CAnimation.cpp
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import struct
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from PIL import Image
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from collections import defaultdict
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import os
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def extract_def(infile,outdir):
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f = open(infile)
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# t - type
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# blocks - # of blocks
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# the second and third entry are width and height which are not used
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t,_,_,blocks = struct.unpack("<IIII", f.read(16))
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palette = []
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for i in range(256):
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r,g,b = struct.unpack("<BBB", f.read(3))
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palette.extend((r,g,b))
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offsets = defaultdict(list)
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for i in range(blocks):
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# bid - block id
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# entries - number of images in this block
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# the third and fourth entry have unknown meaning
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bid,entries,_,_ = struct.unpack("<IIII", f.read(16))
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names=[]
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# a list of 13 character long filenames
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for j in range(entries):
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name, = struct.unpack("13s", f.read(13))
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name = name[:name.index('\0')]
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names.append(name)
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# a list of offsets
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for n in names:
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offs, = struct.unpack("<I", f.read(4))
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offsets[bid].append((n,offs))
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bn = os.path.basename(infile)
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bn = os.path.splitext(bn)[0]
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for bid,l in offsets.items():
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for n,offs in l:
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f.seek(offs)
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pixeldata = ""
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# first entry is the size which is unused
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# fmt - encoding format of image data
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# fw,fh - full width and height
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# w,h - width and height, w must be a multiple of 16
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# lm,tm - left and top margin
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_,fmt,fw,fh,w,h,lm,tm = struct.unpack("<IIIIIIii", f.read(32))
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n = os.path.splitext(n)[0]
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outname = "%s"%outdir+os.sep+"%s_%02d_%s_%dx%d_%dx%d.png"%(bn,bid,n,fw,fh,lm,tm)
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print "writing to %s"%outname
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if fmt == 0:
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# uncompressed, so the following *should* work but there is no
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# test data
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pixeldata = f.read(w*h)
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elif fmt == 1:
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# SGTWMTA.def and SGTWMTB.def fail here
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# they have inconsistent left and top margins
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# they seem to be unused
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if lm > fw or tm > fh:
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print "margins (%dx%d) are higher than dimensions (%dx%d)"%(lm,tm,fw,fh)
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return False
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lineoffs = struct.unpack("<"+"I"*h, f.read(4*h))
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for lineoff in lineoffs:
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f.seek(offs+32+lineoff)
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totalrowlength=0
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while totalrowlength<w:
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code,length = struct.unpack("<BB", f.read(2))
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length+=1
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if code == 0xff: #raw data
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pixeldata += f.read(length)
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else: # rle
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pixeldata += length*chr(code)
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totalrowlength+=length
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elif fmt == 2:
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coff, = struct.unpack("<H", f.read(2))
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coff += 32
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f.seek(coff)
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for i in range(h):
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totalrowlength=0
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while totalrowlength<w:
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segment, = struct.unpack("<B", f.read(1))
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code = segment/32
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length = (segment&31)+1
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if code == 7: # raw data
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pixeldata += f.read(length)
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else: # rle
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pixeldata += length*chr(code)
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totalrowlength+=length
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elif fmt == 3:
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# the first unsigned short in every w/16 byte block is the
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# offset we want - the others have an unknown function
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lineoffs = [struct.unpack("<"+"H"*(w/32), f.read(w/16))[0] for i in range(h)]
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for lineoff in lineoffs:
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f.seek(offs+32+lineoff)
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totalrowlength=0
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while totalrowlength<w:
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segment, = struct.unpack("<B", f.read(1))
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code = segment/32
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length = (segment&31)+1
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if code == 7: # raw data
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pixeldata += f.read(length)
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else: # rle
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pixeldata += length*chr(code)
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totalrowlength+=length
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else:
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print "unknown format: %d"%fmt
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return False
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im = Image.fromstring('P', (w,h),pixeldata)
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im.putpalette(palette)
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im.save(outname)
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return True
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if __name__ == '__main__':
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import sys
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if len(sys.argv) != 3:
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print "usage: %s input.def ./outdir"%sys.argv[0]
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print "to process all files:"
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print " for f in *.def; do n=`basename $f .def`; mkdir -p defs/$n; $s defextract.py $f defs/$n; done"%sys.argv[0]
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exit(1)
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ret = extract_def(sys.argv[1], sys.argv[2])
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exit(0 if ret else 1)
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