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annotate src/libmlk-rpg/rpg/tileset-file.c @ 420:7d2ebc334c8c

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misc: rename core to util
author David Demelier <markand@malikania.fr>
date Wed, 12 Oct 2022 15:26:12 +0200
parents d74f53299252
children 26d23999a54b
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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) 2020-2022 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 <limits.h>
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22 #include <stddef.h>
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23 #include <stdio.h>
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24 #include <stdlib.h>
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25 #include <string.h>
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26
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27 #include <util/util.h>
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28
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29 #include <core/alloc.h>
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30 #include <core/animation.h>
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31 #include <core/error.h>
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32 #include <core/image.h>
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33 #include <core/util.h>
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34 #include <core/zfile.h>
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35
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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 int
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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 0;
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136 }
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137
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138 static int
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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)
411
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142 return errorf("tileheight is null");
215
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143
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144 return 0;
215
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145 }
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146
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147 static int
215
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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;
228
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154 struct tileset_tiledef *td;
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155
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156 alloc_pool_init(&ctx->tf->tiledefs, sizeof (*td), NULL);
215
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157
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158 while (fscanf(ctx->fp, "%hu|%hd|%hd|%hu|%hu\n", &id, &x, &y, &w, &h) == 5) {
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159 td = alloc_pool_new(&ctx->tf->tiledefs);
228
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160 td->id = id;
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161 td->x = x;
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162 td->y = y;
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163 td->w = w;
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164 td->h = h;
215
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165 }
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166
238
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167 /* Sort the array and expose it through the tileset->tiledefs pointer. */
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168 qsort(ctx->tf->tiledefs.data, ctx->tf->tiledefs.size, ctx->tf->tiledefs.elemsize, tileset_tiledef_cmp);
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169 ctx->tileset->tiledefs = ctx->tf->tiledefs.data;
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170 ctx->tileset->tiledefsz = ctx->tf->tiledefs.size;
215
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171
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172 return 0;
215
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173 }
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174
298
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175 static int
218
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176 parse_animations(struct context *ctx, const char *line)
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177 {
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178 (void)line;
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179
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180 unsigned short id;
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181 unsigned int delay;
238
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182 char filename[FILENAME_MAX + 1];
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183 struct tileset_animation_block *anim;
228
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184
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185 alloc_pool_init(&ctx->tf->anims[0], sizeof (struct tileset_animation_block), tileset_animation_block_finish);
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186 alloc_pool_init(&ctx->tf->anims[1], sizeof (struct tileset_animation), NULL);
218
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187
238
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188 /*
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189 * 1. Create the first array of animation, sprite and texture that are
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190 * owned by the tileset_file structure.
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191 */
218
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192 while (fscanf(ctx->fp, "%hu|" MAX_F(FILENAME_MAX) "|%u", &id, filename, &delay) == 3) {
404
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193 anim = alloc_pool_new(&ctx->tf->anims[0]);
238
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194
298
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195 if (image_open(&anim->texture, util_pathf("%s/%s", ctx->basedir, filename)) < 0)
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196 return -1;
218
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197
228
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198 sprite_init(&anim->sprite, &anim->texture, ctx->tilewidth, ctx->tileheight);
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199 animation_init(&anim->animation, &anim->sprite, delay);
238
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200 }
218
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201
238
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202 /*
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203 * 2. Create the second array that only consist of pointers to
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204 * animations referencing the first array.
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205 */
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206 for (size_t i = 0; i < ctx->tf->anims[0].size; ++i) {
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diff changeset
207 struct tileset_animation_block *anim = alloc_pool_get(&ctx->tf->anims[0], i);
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diff changeset
208 struct tileset_animation *ta;
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diff changeset
209
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210 if (!(ta = alloc_pool_new(&ctx->tf->anims[1])))
298
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211 return -1;
228
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212
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213 ta->id = id;
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214 ta->animation = &anim->animation;
218
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diff changeset
215 }
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216
228
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217 /*
238
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218 * 3. Finally expose the second array through the tileset->anims pointer
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219 * and sort it.
228
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220 */
238
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diff changeset
221 qsort(ctx->tf->anims[1].data, ctx->tf->anims[1].size, ctx->tf->anims[1].elemsize, tileset_animation_cmp);
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diff changeset
222 ctx->tileset->anims = ctx->tf->anims[1].data;
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diff changeset
223 ctx->tileset->animsz = ctx->tf->anims[1].size;
218
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diff changeset
224
298
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225 return 0;
218
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diff changeset
226 }
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227
298
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diff changeset
228 static int
215
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229 parse_image(struct context *ctx, const char *line)
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230 {
238
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diff changeset
231 char *p;
215
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232
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233 if (ctx->tilewidth == 0 || ctx->tileheight == 0)
411
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diff changeset
234 return errorf("missing tile dimensions before image");
215
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diff changeset
235 if (!(p = strchr(line, '|')))
411
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diff changeset
236 return errorf("could not parse image");
215
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diff changeset
237
298
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diff changeset
238 if (image_open(&ctx->tf->image, util_pathf("%s/%s", ctx->basedir, p + 1)) < 0)
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diff changeset
239 return -1;
215
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diff changeset
240
64f24b482722 rpg: implement tilesets separately, closes #2515 @4h
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diff changeset
241 sprite_init(&ctx->tf->sprite, &ctx->tf->image, ctx->tilewidth, ctx->tileheight);
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diff changeset
242 ctx->tileset->sprite = &ctx->tf->sprite;
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diff changeset
243
298
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diff changeset
244 return 0;
215
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diff changeset
245 }
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diff changeset
246
298
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diff changeset
247 static int
215
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diff changeset
248 parse_line(struct context *ctx, const char *line)
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parents:
diff changeset
249 {
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diff changeset
250 static const struct {
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251 const char *property;
298
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diff changeset
252 int (*read)(struct context *, const char *);
215
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253 } props[] = {
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254 { "tilewidth", parse_tilewidth },
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diff changeset
255 { "tileheight", parse_tileheight },
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256 { "tiledefs", parse_tiledefs },
218
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diff changeset
257 { "animations", parse_animations },
215
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parents:
diff changeset
258 { "image", parse_image }
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parents:
diff changeset
259 };
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diff changeset
260
261
bfde372bf152 core: prefix utilities with util_
David Demelier <markand@malikania.fr>
parents: 258
diff changeset
261 for (size_t i = 0; i < UTIL_SIZE(props); ++i) {
215
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parents:
diff changeset
262 if (strncmp(line, props[i].property, strlen(props[i].property)) == 0)
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parents:
diff changeset
263 return props[i].read(ctx, line);
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David Demelier <markand@malikania.fr>
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diff changeset
264 }
411
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diff changeset
265
298
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diff changeset
266 return 0;
215
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parents:
diff changeset
267 }
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parents:
diff changeset
268
298
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diff changeset
269 static int
215
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diff changeset
270 parse(struct context *ctx, const char *path)
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parents:
diff changeset
271 {
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diff changeset
272 char line[1024];
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diff changeset
273 char basedir[PATH_MAX];
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parents:
diff changeset
274
420
7d2ebc334c8c misc: rename core to util
David Demelier <markand@malikania.fr>
parents: 411
diff changeset
275 util_strlcpy(basedir, path, sizeof (basedir));
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David Demelier <markand@malikania.fr>
parents: 411
diff changeset
276 util_strlcpy(ctx->basedir, util_dirname(basedir), sizeof (ctx->basedir));
215
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parents:
diff changeset
277
64f24b482722 rpg: implement tilesets separately, closes #2515 @4h
David Demelier <markand@malikania.fr>
parents:
diff changeset
278 while (fgets(line, sizeof (line), ctx->fp)) {
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279 /* Remove \n if any */
309
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280 line[strcspn(line, "\r\n")] = '\0';
215
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281
298
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282 if (parse_line(ctx, line) < 0)
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283 return -1;
215
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284 }
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285
298
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286 return 0;
215
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287 }
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288
298
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289 static int
215
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290 check(const struct tileset *tileset)
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291 {
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292 if (!tileset->sprite)
411
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293 return errorf("missing tileset image");
215
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294
298
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295 return 0;
215
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296 }
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297
298
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298 int
215
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299 tileset_file_open(struct tileset_file *tf, struct tileset *tileset, const char *path)
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300 {
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301 assert(tf);
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302 assert(tileset);
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303 assert(path);
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304
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305 struct context ctx = {
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306 .tf = tf,
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307 .tileset = tileset
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308 };
295
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309 struct zfile zf;
298
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310 int ret = 0;
215
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311
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312 memset(tileset, 0, sizeof (*tileset));
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313
295
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314 if (zfile_open(&zf, path) < 0)
266
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315 return errorf("%s: %s", path, strerror(errno));
295
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316
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317 ctx.fp = zf.fp;
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318
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319 if ((ret = parse(&ctx, path)) < 0 || (ret = check(tileset)) < 0)
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320 tileset_file_finish(tf);
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321
295
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322 zfile_close(&zf);
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323
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324 return ret;
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325 }
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326
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327 void
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328 tileset_file_finish(struct tileset_file *tf)
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329 {
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330 assert(tf);
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331
228
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332 alloc_pool_finish(&tf->tiledefs);
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333 alloc_pool_finish(&tf->anims[0]);
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334 alloc_pool_finish(&tf->anims[1]);
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335
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336 texture_finish(&tf->image);
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337
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338 memset(tf, 0, sizeof (*tf));
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339 }