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annotate pytouhou/formats/anm0.py @ 402:88e2a2485b2b

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Add a version attribute to ANM0 and latest discovered instruction.
author Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
date Sat, 16 Feb 2013 19:31:29 +0100
parents 70e2ed71b09c
children 40d5f3083ebc
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 # -*- encoding: utf-8 -*-
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2 ##
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3 ## Copyright (C) 2011 Thibaut Girka <thib@sitedethib.com>
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4 ##
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5 ## This program is free software; you can redistribute it and/or modify
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6 ## it under the terms of the GNU General Public License as published
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7 ## by the Free Software Foundation; version 3 only.
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8 ##
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9 ## This program is distributed in the hope that it will be useful,
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10 ## but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 ## GNU General Public License for more details.
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13 ##
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14
204
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15 """ANM0 files handling.
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16
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17 This module provides classes for handling the ANM0 file format.
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18 The ANM0 format is a format used in Touhou 6: EoSD to describe sprites
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19 and animations.
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20 Almost everything rendered in the game is described by an ANM0 file.
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21 """
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22
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23 from struct import pack, unpack
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24 from pytouhou.utils.helpers import read_string, get_logger
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25
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26 from pytouhou.formats import WrongFormatError
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27
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28
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29 logger = get_logger(__name__)
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30
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31 #TODO: refactor/clean up
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32
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33
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34 class Script(list):
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35 def __init__(self):
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36 list.__init__(self)
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37 self.interrupts = {}
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38
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39
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40
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41 class ANM0(object):
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42 _instructions = {0: ('', 'delete'),
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43 1: ('I', 'set_sprite'),
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44 2: ('ff', 'set_scale'),
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45 3: ('I', 'set_alpha'),
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46 4: ('BBBx', 'set_color'),
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47 5: ('I', 'jump'),
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48 7: ('', 'toggle_mirrored'),
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49 9: ('fff', 'set_3d_rotations'),
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50 10: ('fff', 'set_3d_rotations_speed'),
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51 11: ('ff', 'set_scale_speed'),
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52 12: ('ii', 'fade'),
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53 13: ('', 'set_blendmode_add'),
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54 14: ('', 'set_blendmode_alphablend'),
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55 15: ('', 'keep_still'),
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56 16: ('ii', 'set_random_sprite'),
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57 17: ('fff', 'set_3d_translation'),
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58 18: ('fffi', 'move_to_linear'),
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59 19: ('fffi', 'move_to_decel'),
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60 20: ('fffi', 'move_to_accel'),
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61 21: ('', 'wait'),
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62 22: ('i', 'interrupt_label'),
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63 23: ('', 'set_corner_relative_placement'),
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64 24: ('', 'wait_ex'),
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65 25: ('i', 'set_allow_offset'), #TODO: better name
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66 26: ('i', 'set_automatic_orientation'),
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67 27: ('f', 'shift_texture_x'),
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68 28: ('f', 'shift_texture_y'),
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69 29: ('i', 'set_visible'),
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70 30: ('ffi', 'scale_in'),
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71 31: ('i', None)}
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73
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74 def __init__(self):
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75 self.version = 0
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76 self.size = (0, 0)
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77 self.first_name = None
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78 self.secondary_name = None
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79 self.sprites = {}
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80 self.scripts = {}
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81
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82
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83 @classmethod
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84 def read(cls, file):
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85 nb_sprites, nb_scripts, zero1 = unpack('<III', file.read(12))
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86 width, height, format, unknown1 = unpack('<IIII', file.read(16))
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87 first_name_offset, unused, secondary_name_offset = unpack('<III', file.read(12))
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88 version, unknown2, thtxoffset, hasdata, nextoffset, zero2 = unpack('<IIIIII', file.read(24))
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89 if version != 0:
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90 raise WrongFormatError(version)
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91 assert (zero1, zero2) == (0, 0)
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92
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93 sprite_offsets = [unpack('<I', file.read(4))[0] for i in range(nb_sprites)]
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94 script_offsets = [unpack('<II', file.read(8)) for i in range(nb_scripts)]
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95
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96 self = cls()
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97
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98 self.size = (width, height)
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99
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100 # Names
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101 if first_name_offset:
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102 file.seek(first_name_offset)
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103 self.first_name = read_string(file, 32, 'ascii') #TODO: 32, really?
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104 if secondary_name_offset:
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105 file.seek(secondary_name_offset)
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106 self.secondary_name = read_string(file, 32, 'ascii') #TODO: 32, really?
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107
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108
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109 # Sprites
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110 file.seek(64)
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111 self.sprites = {}
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112 for offset in sprite_offsets:
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113 file.seek(offset)
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114 idx, x, y, width, height = unpack('<Iffff', file.read(20))
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115 self.sprites[idx] = x, y, width, height
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116
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117
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118 # Scripts
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119 self.scripts = {}
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120 for i, offset in script_offsets:
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121 self.scripts[i] = Script()
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122 instruction_offsets = []
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123 file.seek(offset)
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124 while True:
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125 instruction_offsets.append(file.tell() - offset)
111
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126 time, opcode, size = unpack('<HBB', file.read(4))
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127 data = file.read(size)
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128 if opcode in cls._instructions:
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129 args = unpack('<%s' % cls._instructions[opcode][0], data)
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130 else:
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131 args = (data,)
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132 logger.warn('unknown opcode %d', opcode)
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133
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134 self.scripts[i].append((time, opcode, args))
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135 if opcode == 0:
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136 break
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137
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138 # Translate offsets to instruction pointers and register interrupts
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139 for instr_offset, (j, instr) in zip(instruction_offsets, enumerate(self.scripts[i])):
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140 time, opcode, args = instr
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141 if opcode == 5:
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142 args = (instruction_offsets.index(args[0]),)
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143 elif opcode == 22:
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144 interrupt = args[0]
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145 self.scripts[i].interrupts[interrupt] = j + 1
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146 self.scripts[i][j] = time, opcode, args
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147
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148 return self