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annotate src/th06/anm0.rs @ 702:718348c7608e

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anm0: simplify parsing with more combinators.
author Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
date Fri, 23 Aug 2019 17:22:38 +0200
parents b6c351ca0a35
children 84af5bedbde4
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1 //! ANM0 animation format support.
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2
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3 use nom::{
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4 IResult,
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5 bytes::complete::{tag, take_while_m_n},
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6 number::complete::{le_u8, le_u16, le_u32, le_i32, le_f32},
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7 sequence::tuple,
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8 multi::many_m_n,
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9 };
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10 use std::collections::HashMap;
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11
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12 /// Coordinates of a sprite into the image.
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13 #[derive(Debug, Clone)]
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14 pub struct Sprite {
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15 /// Index inside the anm0.
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16 pub index: u32,
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17
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18 /// X coordinate in the sprite sheet.
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19 pub x: f32,
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20
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21 /// Y coordinate in the sprite sheet.
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22 pub y: f32,
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23
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24 /// Width of the sprite.
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25 pub width: f32,
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26
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27 /// Height of the sprite.
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28 pub height: f32,
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29 }
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30
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31 /// A single instruction, part of a `Script`.
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32 #[derive(Debug, Clone)]
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33 pub struct Call {
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34 /// Time at which this instruction will be called.
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35 pub time: u16,
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36
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37 /// The instruction to call.
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38 pub instr: Instruction,
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39 }
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40
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41 /// Script driving an animation.
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42 #[derive(Debug, Clone)]
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43 pub struct Script {
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44 /// List of instructions in this script.
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45 pub instructions: Vec<Call>,
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46
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47 /// List of interrupts in this script.
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48 pub interrupts: HashMap<i32, u8>
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49 }
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50
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51 /// Main struct of the ANM0 animation format.
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52 #[derive(Debug, Clone)]
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53 pub struct Anm0 {
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54 /// Resolution of the image used by this ANM.
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55 pub size: (u32, u32),
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56
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57 /// Format of this ANM.
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58 pub format: u32,
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59
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60 /// File name of the main image.
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61 pub first_name: String,
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62
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63 /// File name of an alpha channel image.
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64 pub second_name: String,
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65
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66 /// A list of sprites, coordinates into the attached image.
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67 pub sprites: Vec<Sprite>,
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68
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69 /// A map of scripts.
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70 pub scripts: HashMap<u8, Script>,
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71 }
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72
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73 impl Anm0 {
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74 /// Parse a slice of bytes into an `Anm0` struct.
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75 pub fn from_slice(data: &[u8]) -> IResult<&[u8], Vec<Anm0>> {
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76 parse_anm0(data)
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77 }
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78
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79 /// TODO
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80 pub fn inv_size(&self) -> (f32, f32) {
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81 let (x, y) = self.size;
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82 (1. / x as f32, 1. / y as f32)
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83 }
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84 }
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85
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86 fn parse_name(i: &[u8]) -> IResult<&[u8], String> {
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87 let (_, slice) = take_while_m_n(0, 32, |c| c != 0)(i)?;
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88 let string = match String::from_utf8(slice.to_vec()) {
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89 Ok(string) => string,
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90 // XXX: use a more specific error instead.
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91 Err(_) => return Err(nom::Err::Failure((i, nom::error::ErrorKind::Eof)))
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92 };
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93 Ok((i, string))
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94 }
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95
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96 fn parse_sprite(i: &[u8]) -> IResult<&[u8], Sprite> {
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97 let (i, (index, x, y, width, height)) = tuple((le_u32, le_f32, le_f32, le_f32, le_f32))(i)?;
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98 Ok((i, Sprite {
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99 index,
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100 x,
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101 y,
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102 width,
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103 height,
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104 }))
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105 }
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106
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107 macro_rules! declare_anm_instructions {
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108 ($($opcode:tt => fn $name:ident($($arg:ident: $arg_type:ident),*)),*,) => {
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109 /// Available instructions in an `Anm0`.
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110 #[allow(missing_docs)]
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111 #[derive(Debug, Clone, Copy)]
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112 pub enum Instruction {
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113 $(
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114 $name($($arg_type),*)
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115 ),*
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116 }
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117
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118 fn parse_instruction_args(mut i: &[u8], opcode: u8) -> IResult<&[u8], Instruction> {
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119 let instr = match opcode {
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120 $(
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121 $opcode => {
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122 $(
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123 let (i2, $arg) = concat_idents!(le_, $arg_type)(i)?;
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124 i = i2;
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125 )*
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126 Instruction::$name($($arg),*)
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127 }
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128 )*
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129 // XXX: use a more specific error instead.
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130 _ => return Err(nom::Err::Failure((i, nom::error::ErrorKind::Eof)))
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131 };
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132 Ok((i, instr))
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133 }
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134 };
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135 }
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136
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137 declare_anm_instructions!{
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138 0 => fn Delete(),
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139 1 => fn LoadSprite(sprite_number: u32),
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140 2 => fn SetScale(sx: f32, sy: f32),
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141 3 => fn SetAlpha(alpha: u32),
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142 4 => fn SetColor(red: u8, green: u8, blue: u8/*, XXX: x8*/),
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parents: 638
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143 5 => fn Jump(instruction: u32),
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144 7 => fn ToggleMirrored(),
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parents: 638
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145 9 => fn SetRotations3d(x: f32, y: f32, z: f32),
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parents: 638
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146 10 => fn SetRotationsSpeed3d(x: f32, y: f32, z: f32),
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parents: 638
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147 11 => fn SetScaleSpeed(sx: f32, sy: f32),
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parents: 638
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148 12 => fn Fade(alpha: u32, duration: u32),
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149 13 => fn SetBlendmodeAdd(),
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150 14 => fn SetBlendmodeAlphablend(),
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151 15 => fn KeepStill(),
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152 16 => fn LoadRandomSprite(min_index: u32, amplitude: u32),
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153 17 => fn Move(x: f32, y: f32, z: f32),
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parents: 638
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154 18 => fn MoveToLinear(x: f32, y: f32, z: f32, duration: u32),
a8e0219162b6 Implement AnmRunner.
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parents: 638
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155 19 => fn MoveToDecel(x: f32, y: f32, z: f32, duration: u32),
a8e0219162b6 Implement AnmRunner.
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parents: 638
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156 20 => fn MoveToAccel(x: f32, y: f32, z: f32, duration: u32),
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157 21 => fn Wait(),
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Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 638
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158 22 => fn InterruptLabel(label: i32),
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Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
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159 23 => fn SetCornerRelativePlacement(),
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160 24 => fn WaitEx(),
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parents: 638
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161 25 => fn SetAllowOffset(allow: u32), // TODO: better name
a8e0219162b6 Implement AnmRunner.
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162 26 => fn SetAutomaticOrientation(automatic: u32),
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Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 638
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163 27 => fn ShiftTextureX(dx: f32),
a8e0219162b6 Implement AnmRunner.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 638
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164 28 => fn ShiftTextureY(dy: f32),
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Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
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165 29 => fn SetVisible(visible: u32),
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166 30 => fn ScaleIn(sx: f32, sy: f32, duration: u32),
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167 31 => fn Todo(todo: u32),
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168 }
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169
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170 fn parse_anm0(input: &[u8]) -> IResult<&[u8], Vec<Anm0>> {
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171 let mut list = vec![];
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172 let start_offset = 0;
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173 loop {
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174 let i = &input[start_offset..];
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175 let (mut i, (num_sprites, num_scripts, _, width, height, format, _unknown1,
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176 first_name_offset, _unused, second_name_offset, version, _unknown2,
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177 _texture_offset, has_data, _next_offset, unknown3)) =
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178 tuple((le_u32, le_u32, tag(b"\0\0\0\0"), le_u32, le_u32, le_u32, le_u32, le_u32,
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179 le_u32, le_u32, le_u32, le_u32, le_u32, le_u32, le_u32, le_u32))(i)?;
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180
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181 assert_eq!(version, 0);
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182 assert_eq!(unknown3, 0);
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183 assert_eq!(has_data, 0);
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184 let num_sprites = num_sprites as usize;
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185 let num_scripts = num_scripts as usize;
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186
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187 let (i, sprite_offsets) = many_m_n(num_sprites, num_sprites, le_u32)(i)?;
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188 let (_, script_offsets) = many_m_n(num_scripts, num_scripts, tuple((le_u32, le_u32)))(i)?;
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189
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190 let first_name = if first_name_offset > 0 {
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191 if input.len() < start_offset + first_name_offset as usize {
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192 return Err(nom::Err::Failure((input, nom::error::ErrorKind::Eof)));
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193 }
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194 let i = &input[start_offset + first_name_offset as usize..];
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195 let (_, name) = parse_name(i)?;
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196 name
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197 } else {
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198 String::new()
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199 };
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200
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201 let second_name = if second_name_offset > 0 {
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202 if input.len() < start_offset + second_name_offset as usize {
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203 return Err(nom::Err::Failure((input, nom::error::ErrorKind::Eof)));
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204 }
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205 let i = &input[start_offset + second_name_offset as usize..];
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206 let (_, name) = parse_name(i)?;
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207 name
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208 } else {
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209 String::new()
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210 };
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211
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212 let mut sprites = vec![];
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213 let mut i;
702
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214 for offset in sprite_offsets.into_iter().map(|x| x as usize) {
694
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215 if input.len() < start_offset + offset {
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216 return Err(nom::Err::Failure((input, nom::error::ErrorKind::Eof)));
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217 }
638
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218 i = &input[start_offset + offset..];
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219 let (_, sprite) = parse_sprite(i)?;
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220 sprites.push(sprite);
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221 }
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222
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223 let mut scripts = HashMap::new();
702
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diff changeset
224 for (index, offset) in script_offsets.into_iter().map(|(index, offset)| (index as u8, offset as usize)) {
694
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225 if input.len() < start_offset + offset {
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226 return Err(nom::Err::Failure((input, nom::error::ErrorKind::Eof)));
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227 }
638
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228 i = &input[start_offset + offset..];
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229 let mut instruction_offsets = vec![];
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230
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231 let mut instructions = vec![];
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232 loop {
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233 let tell = input.len() - i.len();
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234 instruction_offsets.push(tell - (start_offset + offset));
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235 // TODO: maybe check against the size of parsed data?
702
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236 let (i2, (time, opcode, _size)) = tuple((le_u16, le_u8, le_u8))(i)?;
639
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237 let (i2, instr) = parse_instruction_args(i2, opcode)?;
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238 instructions.push(Call { time, instr });
638
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239 i = i2;
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240 if opcode == 0 {
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241 break;
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242 }
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243 }
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244 let mut interrupts = HashMap::new();
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245 let mut j = 0;
639
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246 for Call { time: _, instr } in &mut instructions {
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diff changeset
247 match instr {
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248 Instruction::Jump(ref mut offset) => {
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249 let result = instruction_offsets.binary_search(&(*offset as usize));
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250 match result {
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251 Ok(ptr) => *offset = ptr as u32,
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252 Err(ptr) => {
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253 // XXX: use a more specific error instead.
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254 return Err(nom::Err::Failure((input, nom::error::ErrorKind::Eof)));
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255 //println!("Instruction offset not found for pointer: {}", ptr);
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256 }
639
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257 }
638
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258 }
639
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259 Instruction::InterruptLabel(interrupt) => {
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260 interrupts.insert(*interrupt, j + 1);
638
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261 }
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262 _ => ()
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263 }
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264 j += 1;
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265 }
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266 scripts.insert(index, Script {
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diff changeset
267 instructions,
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268 interrupts,
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269 });
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270 }
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271
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272 let anm0 = Anm0 {
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273 size: (width, height),
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274 format,
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275 first_name,
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276 second_name,
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277 sprites,
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278 scripts,
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279 };
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280 list.push(anm0);
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281 break;
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282 }
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283 Ok((b"", list))
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284 }
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285
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286 #[cfg(test)]
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287 mod tests {
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288 use super::*;
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289 use std::io::{self, Read};
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290 use std::fs::File;
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291
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292 #[test]
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293 fn anm0() {
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294 let file = File::open("EoSD/CM/player01.anm").unwrap();
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295 let mut file = io::BufReader::new(file);
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296 let mut buf = vec![];
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297 file.read_to_end(&mut buf).unwrap();
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298 let (_, mut anms) = Anm0::from_slice(&buf).unwrap();
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299 assert_eq!(anms.len(), 1);
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300 let anm0 = anms.pop().unwrap();
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301 assert_eq!(anm0.size, (256, 256));
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302 assert_eq!(anm0.format, 5);
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303 }
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304 }