Mercurial > touhou
annotate pytouhou/formats/anm0.py @ 377:70e2ed71b09c
Add meaningful exceptions in format parsing.
author | Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> |
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date | Wed, 29 Aug 2012 18:34:28 +0200 |
parents | da53bc29b94a |
children | 88e2a2485b2b |
rev | line source |
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52
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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 |
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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: ('', None), |
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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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72 |
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73 |
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74 def __init__(self): |
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75 self.size = (0, 0) |
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76 self.first_name = None |
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77 self.secondary_name = None |
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78 self.sprites = {} |
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79 self.scripts = {} |
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80 |
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81 |
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82 @classmethod |
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83 def read(cls, file): |
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84 nb_sprites, nb_scripts, zero1 = unpack('<III', file.read(12)) |
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85 width, height, format, unknown1 = unpack('<IIII', file.read(16)) |
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86 first_name_offset, unused, secondary_name_offset = unpack('<III', file.read(12)) |
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87 version, unknown2, thtxoffset, hasdata, nextoffset, zero2 = unpack('<IIIIII', file.read(24)) |
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88 if version != 0: |
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89 raise WrongFormatError(version) |
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90 assert (zero1, zero2) == (0, 0) |
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91 |
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92 sprite_offsets = [unpack('<I', file.read(4))[0] for i in range(nb_sprites)] |
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93 script_offsets = [unpack('<II', file.read(8)) for i in range(nb_scripts)] |
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94 |
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95 self = cls() |
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96 |
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97 self.size = (width, height) |
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98 |
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99 # Names |
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100 if first_name_offset: |
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101 file.seek(first_name_offset) |
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102 self.first_name = read_string(file, 32, 'ascii') #TODO: 32, really? |
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103 if secondary_name_offset: |
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104 file.seek(secondary_name_offset) |
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105 self.secondary_name = read_string(file, 32, 'ascii') #TODO: 32, really? |
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106 |
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107 |
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108 # Sprites |
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109 file.seek(64) |
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110 self.sprites = {} |
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111 for offset in sprite_offsets: |
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112 file.seek(offset) |
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113 idx, x, y, width, height = unpack('<Iffff', file.read(20)) |
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114 self.sprites[idx] = x, y, width, height |
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115 |
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116 |
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117 # Scripts |
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118 self.scripts = {} |
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119 for i, offset in script_offsets: |
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120 self.scripts[i] = Script() |
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121 instruction_offsets = [] |
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122 file.seek(offset) |
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123 while True: |
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124 instruction_offsets.append(file.tell() - offset) |
111 | 125 time, opcode, size = unpack('<HBB', file.read(4)) |
126 data = file.read(size) | |
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127 if opcode in cls._instructions: |
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128 args = unpack('<%s' % cls._instructions[opcode][0], data) |
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129 else: |
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130 args = (data,) |
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131 logger.warn('unknown opcode %d', opcode) |
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132 |
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133 self.scripts[i].append((time, opcode, args)) |
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134 if opcode == 0: |
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135 break |
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136 |
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137 # Translate offsets to instruction pointers and register interrupts |
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138 for instr_offset, (j, instr) in zip(instruction_offsets, enumerate(self.scripts[i])): |
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139 time, opcode, args = instr |
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140 if opcode == 5: |
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141 args = (instruction_offsets.index(args[0]),) |
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142 elif opcode == 22: |
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143 interrupt = args[0] |
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144 self.scripts[i].interrupts[interrupt] = j + 1 |
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145 self.scripts[i][j] = time, opcode, args |
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146 |
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147 return self |
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148 |