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annotate pytouhou/formats/ecl.py @ 29:afa91be769ae

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Don't lose time updating off-screen enemies' sprites
author Thibaut Girka <thib@sitedethib.com>
date Fri, 12 Aug 2011 22:03:34 +0200
parents 6ebf9539c077
children 1b0ca2fb89f9
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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ca26a84916cb Add preliminary ECL viewer/interpreter.
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1 from struct import pack, unpack
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2 from pytouhou.utils.helpers import read_string
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3
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4 from collections import namedtuple
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6
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7 class ECL(object):
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8 def __init__(self):
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9 self.main = []
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10 self.subs = [[]]
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13 @classmethod
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14 def read(cls, file):
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15 sub_count, main_offset = unpack('<II', file.read(8))
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16 if file.read(8) != b'\x00\x00\x00\x00\x00\x00\x00\x00':
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17 raise Exception #TODO
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18 sub_offsets = unpack('<%s' % ('I' * sub_count), file.read(4 * sub_count))
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19
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20 ecl = cls()
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21 ecl.subs = []
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22 ecl.main = []
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23
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24 # Read subs
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25 for offset in sub_offsets:
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26 file.seek(offset)
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27 ecl.subs.append([])
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28 while True:
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29 time, opcode = unpack('<IH', file.read(6))
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30 if time == 0xffffffff or opcode == 0xffff:
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31 break
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32 size, rank_mask, param_mask = unpack('<HHH', file.read(6))
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33 data = file.read(size - 12)
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34 #TODO: unpack data
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35 ecl.subs[-1].append((time, opcode, rank_mask, param_mask, data))
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36
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37 # Read main
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38 file.seek(main_offset)
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39 while True:
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40 time, = unpack('<H', file.read(2))
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41 if time == 0xffff:
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42 break
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43 sub, instr_type, size = unpack('<HHH', file.read(6))
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44 data = file.read(size - 8)
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6ebf9539c077 Handle more enemies types and movements
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45 if instr_type in (0, 2, 4, 6): # Enemy spawn
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46 args = unpack('<ffIhHHH', data)
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47 else:
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48 print('ECL: Warning: unknown opcode %d (%r)' % (instr_type, data)) #TODO
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49 args = (data,)
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50 ecl.main.append((time, sub, instr_type, args))
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51
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52 return ecl
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53