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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
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5
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6 class Object(object):
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7 def __init__(self):
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8 self.header = (b'\x00') * 28 #TODO
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9 self.quads = []
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10
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11
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12
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13 class Stage(object):
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14 def __init__(self):
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15 self.name = ''
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16 self.bgms = (('', ''), ('', ''), ('', ''))
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17 self.objects = []
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18 self.object_instances = []
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19 self.script = []
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20
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21
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22 @classmethod
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23 def read(cls, file):
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24 stage = Stage()
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25
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26 nb_objects, nb_faces = unpack('<HH', file.read(4))
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27 object_instances_offset, script_offset = unpack('<II', file.read(8))
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28 if file.read(4) != b'\x00\x00\x00\x00':
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29 raise Exception #TODO
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30
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31 stage.name = read_string(file, 128, 'shift-jis')
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32
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33 bgm_a = read_string(file, 128, 'shift-jis')
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34 bgm_b = read_string(file, 128, 'shift-jis')
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35 bgm_c = read_string(file, 128, 'shift-jis')
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36 bgm_d = read_string(file, 128, 'shift-jis')
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37
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38 bgm_a_path = read_string(file, 128, 'ascii')
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39 bgm_b_path = read_string(file, 128, 'ascii')
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40 bgm_c_path = read_string(file, 128, 'ascii')
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41 bgm_d_path = read_string(file, 128, 'ascii')
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42
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43 stage.bgms = [(bgm_a, bgm_a_path), (bgm_b, bgm_b_path), (bgm_c, bgm_c_path), (bgm_d, bgm_d_path)] #TODO: handle ' '
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44
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45 # Read object definitions
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46 offsets = unpack('<%s' % ('I' * nb_objects), file.read(4 * nb_objects))
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47 for offset in offsets:
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48 obj = Object()
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49 obj.header = file.read(28) #TODO: this has to be reversed!
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50 while True:
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51 unknown, size = unpack('<HH', file.read(4))
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52 if unknown == 0xffff:
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53 break
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54 if size != 0x1c:
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55 raise Exception #TODO
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56 script_index, _padding, x, y, z, width, height = unpack('<HHfffff', file.read(24))
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57 #TODO: store script_index, x, y, z, width and height
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58 obj.quads.append((script_index, x, y, z, width, height))
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59 stage.objects.append(obj)
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60
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61
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62 # Read object usages
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63 file.seek(object_instances_offset)
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64 while True:
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65 obj_id, unknown, x, y, z = unpack('<HHfff', file.read(16))
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66 if (obj_id, unknown) == (0xffff, 0xffff):
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67 break
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68 if unknown != 256:
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69 raise Exception #TODO
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70 stage.object_instances.append((stage.objects[obj_id], x, y, z))
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71
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72
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73 # Read other funny things (script)
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74 file.seek(script_offset)
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75 while True:
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76 frame, message_type, size = unpack('<IHH', file.read(8))
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77 if (frame, message_type, size) == (0xffffffff, 0xffff, 0xffff):
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78 break
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79 if size != 0x0c:
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80 raise Exception #TODO
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81 data = file.read(12)
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82 #TODO: do something useful with this
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83
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84 return stage
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85
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