Mercurial > molko
annotate libmlk-rpg/rpg/tileset-file.c @ 295:aec448037320
rpg: add support for compressed tilesets/maps
author | David Demelier <markand@malikania.fr> |
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date | Wed, 10 Mar 2021 16:40:02 +0100 |
parents | e48ffbcf9bcc |
children | 196264679079 |
rev | line source |
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1 /* |
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2 * tileset-file.c -- tileset file loader |
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3 * |
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4 * Copyright (c) 2020 David Demelier <markand@malikania.fr> |
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5 * |
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6 * Permission to use, copy, modify, and/or distribute this software for any |
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7 * purpose with or without fee is hereby granted, provided that the above |
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8 * copyright notice and this permission notice appear in all copies. |
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9 * |
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10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
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13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
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15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
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16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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17 */ |
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18 |
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19 #include <assert.h> |
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20 #include <errno.h> |
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21 #include <libgen.h> |
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22 #include <limits.h> |
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23 #include <stddef.h> |
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24 #include <stdio.h> |
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25 #include <stdlib.h> |
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26 #include <string.h> |
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27 |
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28 #include <core/alloc.h> |
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29 #include <core/animation.h> |
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30 #include <core/error.h> |
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31 #include <core/image.h> |
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32 #include <core/util.h> |
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33 #include <core/zfile.h> |
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34 |
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35 #include "rpg_p.h" |
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36 #include "tileset-file.h" |
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37 #include "tileset.h" |
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38 |
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39 #define MAX_F(v) MAX_F_(v) |
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40 #define MAX_F_(v) "%" #v "[^\n|]" |
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41 |
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42 /* |
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43 * This is how memory for animations is allocated in the tileset_file |
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44 * structure. |
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45 * |
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46 * As animations require a texture and a sprite to be present, we need to store |
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47 * them locally in the tileset_file structure. |
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48 * |
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49 * tileset_file->anims[0] array (struct tileset_animation_block): |
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50 * |
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51 * [0] [1] [N] |
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52 * | texture | texture | texture |
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53 * | sprite | sprite | sprite |
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54 * | animation | animation | animation |
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55 * |
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56 * tileset_file->anims[1] array (struct tileset_animation): |
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57 * |
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58 * [0] [1] [N] |
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59 * | id | id | id |
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60 * | animation ^ | animation ^ | animation ^ |
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61 * |
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62 * The second array is the exposed array through the tileset->anims pointer, |
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63 * animations are referenced from the first array. This is because user may need |
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64 * or replace the tileset by itself and as such we need to keep track of the |
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65 * resource the tileset_file has allocated itself. |
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66 */ |
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67 |
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68 struct tileset_animation_block { |
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69 struct texture texture; |
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70 struct sprite sprite; |
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71 struct animation animation; |
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72 }; |
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73 |
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74 struct context { |
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75 struct tileset_file *tf; |
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76 struct tileset *tileset; |
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77 FILE *fp; |
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78 |
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79 char basedir[PATH_MAX]; |
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80 |
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81 /* |
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82 * The following properties aren't stored in the tileset because they |
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83 * are not needed after loading. |
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84 */ |
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85 unsigned int tilewidth; |
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86 unsigned int tileheight; |
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87 |
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88 /* Number of rows/columns in the image. */ |
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89 unsigned int nrows; |
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90 unsigned int ncolumns; |
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91 }; |
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92 |
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93 static void |
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94 tileset_animation_block_finish(void *data) |
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95 { |
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96 struct tileset_animation_block *anim = data; |
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97 |
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98 texture_finish(&anim->texture); |
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99 } |
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100 |
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101 static int |
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102 tileset_tiledef_cmp(const void *d1, const void *d2) |
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103 { |
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104 const struct tileset_tiledef *mtd1 = d1; |
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105 const struct tileset_tiledef *mtd2 = d2; |
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106 |
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107 if (mtd1->id < mtd2->id) |
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108 return -1; |
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109 if (mtd1->id > mtd2->id) |
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110 return 1; |
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111 |
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112 return 0; |
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113 } |
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114 |
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115 static int |
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116 tileset_animation_cmp(const void *d1, const void *d2) |
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117 { |
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118 const struct tileset_animation *mtd1 = d1; |
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119 const struct tileset_animation *mtd2 = d2; |
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120 |
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121 if (mtd1->id < mtd2->id) |
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122 return -1; |
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123 if (mtd1->id > mtd2->id) |
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124 return 1; |
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125 |
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126 return 0; |
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127 } |
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128 |
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129 static bool |
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130 parse_tilewidth(struct context *ctx, const char *line) |
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131 { |
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132 if (sscanf(line, "tilewidth|%u", &ctx->tilewidth) != 1 || ctx->tilewidth == 0) |
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133 return errorf(_("tilewidth is null")); |
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134 |
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135 return true; |
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136 } |
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137 |
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138 static bool |
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139 parse_tileheight(struct context *ctx, const char *line) |
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140 { |
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141 if (sscanf(line, "tileheight|%u", &ctx->tileheight) != 1 || ctx->tileheight == 0) |
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142 return errorf(_("tileheight is null")); |
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143 |
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144 return true; |
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145 } |
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146 |
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147 static bool |
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148 parse_tiledefs(struct context *ctx, const char *line) |
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149 { |
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150 (void)line; |
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151 |
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152 short x, y; |
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153 unsigned short id, w, h; |
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154 struct tileset_tiledef *td; |
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155 |
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156 if (!alloc_pool_init(&ctx->tf->tiledefs, sizeof (*td), NULL)) |
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157 return false; |
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158 |
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159 while (fscanf(ctx->fp, "%hu|%hd|%hd|%hu|%hu\n", &id, &x, &y, &w, &h) == 5) { |
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160 if (!(td = alloc_pool_new(&ctx->tf->tiledefs))) |
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161 return false; |
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162 |
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163 td->id = id; |
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164 td->x = x; |
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165 td->y = y; |
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166 td->w = w; |
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167 td->h = h; |
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168 } |
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169 |
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170 /* Sort the array and expose it through the tileset->tiledefs pointer. */ |
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171 qsort(ctx->tf->tiledefs.data, ctx->tf->tiledefs.size, ctx->tf->tiledefs.elemsize, tileset_tiledef_cmp); |
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172 ctx->tileset->tiledefs = ctx->tf->tiledefs.data; |
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173 ctx->tileset->tiledefsz = ctx->tf->tiledefs.size; |
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174 |
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175 return true; |
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176 } |
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177 |
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178 static bool |
218
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179 parse_animations(struct context *ctx, const char *line) |
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180 { |
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181 (void)line; |
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182 |
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183 unsigned short id; |
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184 unsigned int delay; |
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185 char filename[FILENAME_MAX + 1]; |
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186 |
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187 if (!alloc_pool_init(&ctx->tf->anims[0], sizeof (struct tileset_animation_block), tileset_animation_block_finish) || |
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188 !alloc_pool_init(&ctx->tf->anims[1], sizeof (struct tileset_animation), NULL)) |
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189 return false; |
218
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190 |
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191 /* |
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192 * 1. Create the first array of animation, sprite and texture that are |
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193 * owned by the tileset_file structure. |
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194 */ |
218
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195 while (fscanf(ctx->fp, "%hu|" MAX_F(FILENAME_MAX) "|%u", &id, filename, &delay) == 3) { |
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196 struct tileset_animation_block *anim; |
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197 |
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198 if (!(anim = alloc_pool_new(&ctx->tf->anims[0]))) |
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199 return false; |
261
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200 if (!image_open(&anim->texture, util_pathf("%s/%s", ctx->basedir, filename))) |
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201 return false; |
218
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202 |
228
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203 sprite_init(&anim->sprite, &anim->texture, ctx->tilewidth, ctx->tileheight); |
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204 animation_init(&anim->animation, &anim->sprite, delay); |
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205 } |
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206 |
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207 /* |
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208 * 2. Create the second array that only consist of pointers to |
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209 * animations referencing the first array. |
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210 */ |
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211 for (size_t i = 0; i < ctx->tf->anims[0].size; ++i) { |
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212 struct tileset_animation_block *anim = alloc_pool_get(&ctx->tf->anims[0], i); |
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213 struct tileset_animation *ta; |
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214 |
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215 if (!(ta = alloc_pool_new(&ctx->tf->anims[1]))) |
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216 return false; |
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217 |
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218 ta->id = id; |
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219 ta->animation = &anim->animation; |
218
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220 } |
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221 |
228
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222 /* |
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223 * 3. Finally expose the second array through the tileset->anims pointer |
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224 * and sort it. |
228
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225 */ |
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226 qsort(ctx->tf->anims[1].data, ctx->tf->anims[1].size, ctx->tf->anims[1].elemsize, tileset_animation_cmp); |
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227 ctx->tileset->anims = ctx->tf->anims[1].data; |
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228 ctx->tileset->animsz = ctx->tf->anims[1].size; |
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229 |
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230 return true; |
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231 } |
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232 |
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233 static bool |
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234 parse_image(struct context *ctx, const char *line) |
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235 { |
238
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236 char *p; |
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237 |
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238 if (ctx->tilewidth == 0 || ctx->tileheight == 0) |
241
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239 return errorf(_("missing tile dimensions before image")); |
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240 if (!(p = strchr(line, '|'))) |
241
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241 return errorf(_("could not parse image")); |
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242 |
261
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243 if (!image_open(&ctx->tf->image, util_pathf("%s/%s", ctx->basedir, p + 1))) |
215
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244 return false; |
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245 |
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246 sprite_init(&ctx->tf->sprite, &ctx->tf->image, ctx->tilewidth, ctx->tileheight); |
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247 ctx->tileset->sprite = &ctx->tf->sprite; |
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248 |
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249 return true; |
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250 } |
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251 |
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252 static bool |
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253 parse_line(struct context *ctx, const char *line) |
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254 { |
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255 static const struct { |
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256 const char *property; |
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257 bool (*read)(struct context *, const char *); |
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258 } props[] = { |
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259 { "tilewidth", parse_tilewidth }, |
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260 { "tileheight", parse_tileheight }, |
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261 { "tiledefs", parse_tiledefs }, |
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262 { "animations", parse_animations }, |
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263 { "image", parse_image } |
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264 }; |
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265 |
261
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266 for (size_t i = 0; i < UTIL_SIZE(props); ++i) { |
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267 if (strncmp(line, props[i].property, strlen(props[i].property)) == 0) |
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268 return props[i].read(ctx, line); |
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269 } |
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270 |
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271 return true; |
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272 } |
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273 |
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274 static bool |
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275 parse(struct context *ctx, const char *path) |
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276 { |
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277 char line[1024]; |
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278 char basedir[PATH_MAX]; |
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279 |
258
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280 strlcpy(basedir, path, sizeof (basedir)); |
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281 strlcpy(ctx->basedir, dirname(basedir), sizeof (ctx->basedir)); |
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282 |
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283 while (fgets(line, sizeof (line), ctx->fp)) { |
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284 /* Remove \n if any */ |
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285 line[strcspn(line, "\n")] = '\0'; |
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286 |
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287 if (!parse_line(ctx, line)) |
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288 return false; |
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289 } |
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290 |
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291 return true; |
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292 } |
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293 |
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294 static bool |
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295 check(const struct tileset *tileset) |
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296 { |
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297 if (!tileset->sprite) |
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298 return errorf(_("missing tileset image")); |
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299 |
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300 return true; |
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301 } |
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302 |
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303 bool |
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304 tileset_file_open(struct tileset_file *tf, struct tileset *tileset, const char *path) |
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305 { |
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306 assert(tf); |
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307 assert(tileset); |
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308 assert(path); |
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309 |
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310 struct context ctx = { |
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311 .tf = tf, |
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312 .tileset = tileset |
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313 }; |
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314 struct zfile zf; |
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315 bool ret = true; |
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316 |
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317 memset(tileset, 0, sizeof (*tileset)); |
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318 |
295
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319 if (zfile_open(&zf, path) < 0) |
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320 return errorf("%s: %s", path, strerror(errno)); |
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321 |
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322 ctx.fp = zf.fp; |
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323 |
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324 if (!(ret = parse(&ctx, path)) || !(ret = check(tileset))) |
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325 tileset_file_finish(tf); |
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326 |
295
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327 zfile_close(&zf); |
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328 |
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329 return ret; |
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330 } |
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331 |
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332 void |
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333 tileset_file_finish(struct tileset_file *tf) |
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334 { |
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335 assert(tf); |
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336 |
228
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337 alloc_pool_finish(&tf->tiledefs); |
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338 alloc_pool_finish(&tf->anims[0]); |
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339 alloc_pool_finish(&tf->anims[1]); |
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340 |
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341 texture_finish(&tf->image); |
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342 |
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343 memset(tf, 0, sizeof (*tf)); |
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344 } |