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annotate pytouhou/formats/anm0.py @ 236:741860192b56

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Implement ANM0 interrupts “Instruction” 22 is used as a label for interrupts. If the normal animation is interrupted, it goes straight to the matched instruction. Interrupt -1 matches all interrupts.
author Thibaut Girka <thib@sitedethib.com>
date Sun, 01 Jan 2012 19:47:34 +0100
parents 88361534c77e
children 901489c21d19
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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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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26
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27 logger = get_logger(__name__)
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28
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29 #TODO: refactor/clean up
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30
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31
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32 class Script(list):
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33 def __init__(self):
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34 list.__init__(self)
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35 self.interrupts = {}
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36
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37
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38
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39 class Animations(object):
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40 _instructions = {0: ('', 'delete'),
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41 1: ('I', 'set_sprite'),
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42 2: ('ff', 'set_scale'),
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43 3: ('I', 'set_alpha'),
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44 4: ('BBBx', 'set_color'),
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45 5: ('I', 'jump'),
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46 7: ('', 'toggle_mirrored'),
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47 9: ('fff', 'set_3d_rotations'),
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48 10: ('fff', 'set_3d_rotations_speed'),
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49 11: ('ff', 'set_scale_speed'),
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50 12: ('ii', 'fade'),
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51 13: ('', 'set_blendmode_add'),
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52 14: ('', 'set_blendmode_alphablend'),
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53 15: ('', 'keep_still'),
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54 16: ('ii', 'set_random_sprite'),
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55 17: ('fff', 'set_3d_translation'),
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56 18: ('fffi', 'move_to_linear'),
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57 19: ('fffi', 'move_to_decel'),
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58 20: ('fffi', 'move_to_accel'),
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59 21: ('', 'wait'),
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60 22: ('i', 'interrupt_label'),
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61 23: ('', 'set_corner_relative_placement'),
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62 24: ('', None),
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63 25: ('i', 'set_allow_offset'), #TODO: better name
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64 26: ('i', 'set_automatic_orientation'),
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65 27: ('f', 'shift_texture_x'),
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66 28: ('f', 'shift_texture_y'),
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67 30: ('ffi', 'scale_in'),
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68 31: ('i', None)}
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70
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71 def __init__(self):
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72 self.size = (0, 0)
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73 self.first_name = None
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74 self.secondary_name = None
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75 self.sprites = {}
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76 self.scripts = {}
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77
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78
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79 @classmethod
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80 def read(cls, file):
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81 nb_sprites, nb_scripts, zero1 = unpack('<III', file.read(12))
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82 width, height, format, zero2 = unpack('<IIII', file.read(16))
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83 first_name_offset, unused, secondary_name_offset = unpack('<III', file.read(12))
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84 version, unknown1, thtxoffset, hasdata, nextoffset = unpack('<IIIII', file.read(20))
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85 if version != 0:
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86 raise Exception #TODO
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87 file.read(4) #TODO
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88
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89 sprite_offsets = [unpack('<I', file.read(4))[0] for i in range(nb_sprites)]
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90 script_offsets = [unpack('<II', file.read(8)) for i in range(nb_scripts)]
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91
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92 anm = Animations()
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93
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94 anm.size = (width, height)
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95
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96 # Names
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97 if first_name_offset:
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98 file.seek(first_name_offset)
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99 anm.first_name = read_string(file, 32, 'ascii') #TODO: 32, really?
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100 if secondary_name_offset:
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101 file.seek(secondary_name_offset)
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102 anm.secondary_name = read_string(file, 32, 'ascii') #TODO: 32, really?
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103
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104
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105 # Sprites
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106 file.seek(64)
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107 anm.sprites = {}
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108 for offset in sprite_offsets:
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109 file.seek(offset)
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110 idx, x, y, width, height = unpack('<Iffff', file.read(20))
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111 anm.sprites[idx] = x, y, width, height
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112
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113
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114 # Scripts
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115 anm.scripts = {}
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116 for i, offset in script_offsets:
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117 anm.scripts[i] = Script()
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118 instruction_offsets = []
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119 file.seek(offset)
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120 while True:
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121 #TODO
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122 instruction_offsets.append(file.tell() - offset)
111
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123 time, opcode, size = unpack('<HBB', file.read(4))
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124 data = file.read(size)
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125 if opcode in cls._instructions:
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126 args = unpack('<%s' % cls._instructions[opcode][0], data)
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127 else:
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128 args = (data,)
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129 logger.warn('unknown opcode %d', opcode)
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131 anm.scripts[i].append((time, opcode, args))
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132 if opcode == 0:
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133 break
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134
236
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135 # Translate offsets to instruction pointers and register interrupts
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136 for instr_offset, (j, instr) in zip(instruction_offsets, enumerate(anm.scripts[i])):
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137 time, opcode, args = instr
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138 if opcode == 5:
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139 args = (instruction_offsets.index(args[0]),)
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140 if opcode == 22:
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141 interrupt = args[0]
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142 anm.scripts[i].interrupts[interrupt] = j + 1
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143 anm.scripts[i][j] = time, opcode, args
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144 #TODO
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145
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146 return anm
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147