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annotate libmlk-rpg/mlk/rpg/tileset-file.c @ 445:773a082f0b91

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misc: update copyright years
author David Demelier <markand@malikania.fr>
date Wed, 01 Feb 2023 13:08:54 +0100
parents 9c3b3935f0aa
children 4607eea0eabc
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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) 2020-2023 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 <mlk/util/util.h>
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29 #include <mlk/core/alloc.h>
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30 #include <mlk/core/animation.h>
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31 #include <mlk/core/error.h>
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32 #include <mlk/core/image.h>
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33 #include <mlk/core/util.h>
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34
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35 #include "tileset-file.h"
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36 #include "tileset.h"
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37
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38 #define MAX_F(v) MAX_F_(v)
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39 #define MAX_F_(v) "%" #v "[^\n|]"
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40
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41 /*
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42 * This is how memory for animations is allocated in the tileset_file
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43 * structure.
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44 *
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45 * As animations require a texture and a sprite to be present, we need to store
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46 * them locally in the tileset_file structure.
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47 *
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48 * tileset_file->anims[0] array (struct tileset_animation_block):
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49 *
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50 * [0] [1] [N]
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51 * | texture | texture | texture
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52 * | sprite | sprite | sprite
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53 * | animation | animation | animation
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54 *
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55 * tileset_file->anims[1] array (struct tileset_animation):
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56 *
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57 * [0] [1] [N]
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58 * | id | id | id
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59 * | animation ^ | animation ^ | animation ^
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60 *
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61 * The second array is the exposed array through the tileset->anims pointer,
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62 * animations are referenced from the first array. This is because user may need
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63 * or replace the tileset by itself and as such we need to keep track of the
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64 * resource the tileset_file has allocated itself.
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65 */
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66
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67 struct tileset_animation_block {
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68 struct texture texture;
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69 struct sprite sprite;
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70 struct animation animation;
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71 };
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72
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73 struct context {
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74 struct tileset_file *tf;
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75 struct tileset *tileset;
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76 FILE *fp;
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77
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78 char basedir[PATH_MAX];
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79
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80 /*
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81 * The following properties aren't stored in the tileset because they
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82 * are not needed after loading.
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83 */
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84 unsigned int tilewidth;
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85 unsigned int tileheight;
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86
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87 /* Number of rows/columns in the image. */
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88 unsigned int nrows;
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89 unsigned int ncolumns;
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90 };
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91
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92 static void
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93 tileset_animation_block_finish(void *data)
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94 {
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95 struct tileset_animation_block *anim = data;
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96
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97 texture_finish(&anim->texture);
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98 }
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99
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100 static int
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101 tileset_tiledef_cmp(const void *d1, const void *d2)
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102 {
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103 const struct tileset_tiledef *mtd1 = d1;
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104 const struct tileset_tiledef *mtd2 = d2;
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105
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106 if (mtd1->id < mtd2->id)
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107 return -1;
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108 if (mtd1->id > mtd2->id)
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109 return 1;
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110
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111 return 0;
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112 }
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113
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114 static int
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115 tileset_animation_cmp(const void *d1, const void *d2)
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116 {
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117 const struct tileset_animation *mtd1 = d1;
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118 const struct tileset_animation *mtd2 = d2;
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119
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120 if (mtd1->id < mtd2->id)
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121 return -1;
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122 if (mtd1->id > mtd2->id)
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123 return 1;
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124
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125 return 0;
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126 }
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127
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128 static int
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129 parse_tilewidth(struct context *ctx, const char *line)
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130 {
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131 if (sscanf(line, "tilewidth|%u", &ctx->tilewidth) != 1 || ctx->tilewidth == 0)
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132 return errorf("tilewidth is null");
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133
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134 return 0;
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135 }
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136
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137 static int
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138 parse_tileheight(struct context *ctx, const char *line)
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139 {
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140 if (sscanf(line, "tileheight|%u", &ctx->tileheight) != 1 || ctx->tileheight == 0)
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141 return errorf("tileheight is null");
215
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142
298
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143 return 0;
215
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144 }
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145
298
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146 static int
215
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147 parse_tiledefs(struct context *ctx, const char *line)
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148 {
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149 (void)line;
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150
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151 short x, y;
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152 unsigned short id, w, h;
228
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153 struct tileset_tiledef *td;
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154
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155 mlk_alloc_pool_init(&ctx->tf->tiledefs, 16, sizeof (*td), NULL);
215
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156
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157 while (fscanf(ctx->fp, "%hu|%hd|%hd|%hu|%hu\n", &id, &x, &y, &w, &h) == 5) {
438
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158 td = mlk_alloc_pool_new(&ctx->tf->tiledefs);
228
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159 td->id = id;
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160 td->x = x;
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161 td->y = y;
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162 td->w = w;
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163 td->h = h;
215
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164 }
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165
238
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166 /* Sort the array and expose it through the tileset->tiledefs pointer. */
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167 qsort(ctx->tf->tiledefs.data, ctx->tf->tiledefs.size, ctx->tf->tiledefs.elemsize, tileset_tiledef_cmp);
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168 ctx->tileset->tiledefs = ctx->tf->tiledefs.data;
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169 ctx->tileset->tiledefsz = ctx->tf->tiledefs.size;
215
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170
298
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diff changeset
171 return 0;
215
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172 }
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173
298
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174 static int
218
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175 parse_animations(struct context *ctx, const char *line)
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176 {
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177 (void)line;
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178
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179 unsigned short id;
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180 unsigned int delay;
238
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181 char filename[FILENAME_MAX + 1];
404
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182 struct tileset_animation_block *anim;
228
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183
442
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184 mlk_alloc_pool_init(&ctx->tf->anims[0], 16,
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185 sizeof (struct tileset_animation_block), tileset_animation_block_finish);
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186 mlk_alloc_pool_init(&ctx->tf->anims[1], 16,
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187 sizeof (struct tileset_animation), NULL);
218
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188
238
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189 /*
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190 * 1. Create the first array of animation, sprite and texture that are
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191 * owned by the tileset_file structure.
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192 */
218
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193 while (fscanf(ctx->fp, "%hu|" MAX_F(FILENAME_MAX) "|%u", &id, filename, &delay) == 3) {
438
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194 anim = mlk_alloc_pool_new(&ctx->tf->anims[0]);
238
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195
298
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196 if (image_open(&anim->texture, util_pathf("%s/%s", ctx->basedir, filename)) < 0)
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197 return -1;
218
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198
228
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199 sprite_init(&anim->sprite, &anim->texture, ctx->tilewidth, ctx->tileheight);
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200 animation_init(&anim->animation, &anim->sprite, delay);
238
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201 }
218
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202
238
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diff changeset
203 /*
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204 * 2. Create the second array that only consist of pointers to
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205 * animations referencing the first array.
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206 */
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207 for (size_t i = 0; i < ctx->tf->anims[0].size; ++i) {
438
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diff changeset
208 struct tileset_animation_block *anim = mlk_alloc_pool_get(&ctx->tf->anims[0], i);
238
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diff changeset
209 struct tileset_animation *ta;
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diff changeset
210
438
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diff changeset
211 if (!(ta = mlk_alloc_pool_new(&ctx->tf->anims[1])))
298
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212 return -1;
228
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diff changeset
213
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214 ta->id = id;
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215 ta->animation = &anim->animation;
218
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diff changeset
216 }
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217
228
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diff changeset
218 /*
238
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219 * 3. Finally expose the second array through the tileset->anims pointer
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220 * and sort it.
228
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221 */
238
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diff changeset
222 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
223 ctx->tileset->anims = ctx->tf->anims[1].data;
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diff changeset
224 ctx->tileset->animsz = ctx->tf->anims[1].size;
218
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diff changeset
225
298
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diff changeset
226 return 0;
218
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diff changeset
227 }
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diff changeset
228
298
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diff changeset
229 static int
215
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230 parse_image(struct context *ctx, const char *line)
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231 {
238
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diff changeset
232 char *p;
215
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233
64f24b482722 rpg: implement tilesets separately, closes #2515 @4h
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234 if (ctx->tilewidth == 0 || ctx->tileheight == 0)
411
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diff changeset
235 return errorf("missing tile dimensions before image");
215
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diff changeset
236 if (!(p = strchr(line, '|')))
411
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diff changeset
237 return errorf("could not parse image");
215
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diff changeset
238
298
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diff changeset
239 if (image_open(&ctx->tf->image, util_pathf("%s/%s", ctx->basedir, p + 1)) < 0)
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diff changeset
240 return -1;
215
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diff changeset
241
64f24b482722 rpg: implement tilesets separately, closes #2515 @4h
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diff changeset
242 sprite_init(&ctx->tf->sprite, &ctx->tf->image, ctx->tilewidth, ctx->tileheight);
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diff changeset
243 ctx->tileset->sprite = &ctx->tf->sprite;
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diff changeset
244
298
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diff changeset
245 return 0;
215
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diff changeset
246 }
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diff changeset
247
298
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diff changeset
248 static int
215
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diff changeset
249 parse_line(struct context *ctx, const char *line)
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diff changeset
250 {
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diff changeset
251 static const struct {
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252 const char *property;
298
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diff changeset
253 int (*read)(struct context *, const char *);
215
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254 } props[] = {
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255 { "tilewidth", parse_tilewidth },
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diff changeset
256 { "tileheight", parse_tileheight },
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257 { "tiledefs", parse_tiledefs },
218
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diff changeset
258 { "animations", parse_animations },
215
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259 { "image", parse_image }
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diff changeset
260 };
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diff changeset
261
261
bfde372bf152 core: prefix utilities with util_
David Demelier <markand@malikania.fr>
parents: 258
diff changeset
262 for (size_t i = 0; i < UTIL_SIZE(props); ++i) {
215
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diff changeset
263 if (strncmp(line, props[i].property, strlen(props[i].property)) == 0)
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parents:
diff changeset
264 return props[i].read(ctx, line);
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diff changeset
265 }
411
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diff changeset
266
298
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diff changeset
267 return 0;
215
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diff changeset
268 }
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269
298
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diff changeset
270 static int
215
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diff changeset
271 parse(struct context *ctx, const char *path)
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parents:
diff changeset
272 {
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diff changeset
273 char line[1024];
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diff changeset
274 char basedir[PATH_MAX];
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parents:
diff changeset
275
420
7d2ebc334c8c misc: rename core to util
David Demelier <markand@malikania.fr>
parents: 411
diff changeset
276 util_strlcpy(basedir, path, sizeof (basedir));
7d2ebc334c8c misc: rename core to util
David Demelier <markand@malikania.fr>
parents: 411
diff changeset
277 util_strlcpy(ctx->basedir, util_dirname(basedir), sizeof (ctx->basedir));
215
64f24b482722 rpg: implement tilesets separately, closes #2515 @4h
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parents:
diff changeset
278
64f24b482722 rpg: implement tilesets separately, closes #2515 @4h
David Demelier <markand@malikania.fr>
parents:
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279 while (fgets(line, sizeof (line), ctx->fp)) {
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280 /* Remove \n if any */
309
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281 line[strcspn(line, "\r\n")] = '\0';
215
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282
298
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283 if (parse_line(ctx, line) < 0)
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284 return -1;
215
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285 }
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286
298
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287 return 0;
215
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288 }
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289
298
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290 static int
215
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291 check(const struct tileset *tileset)
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292 {
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293 if (!tileset->sprite)
411
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294 return errorf("missing tileset image");
215
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295
298
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296 return 0;
215
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297 }
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298
298
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299 int
215
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300 tileset_file_open(struct tileset_file *tf, struct tileset *tileset, const char *path)
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301 {
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302 assert(tf);
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303 assert(tileset);
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304 assert(path);
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305
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306 struct context ctx = {
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307 .tf = tf,
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308 .tileset = tileset
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309 };
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
428
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314 if (!(ctx.fp = fopen(path, "r")))
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315 return -1;
298
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316 if ((ret = parse(&ctx, path)) < 0 || (ret = check(tileset)) < 0)
215
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317 tileset_file_finish(tf);
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318
428
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319 fclose(ctx.fp);
295
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320
215
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321 return ret;
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322 }
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323
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324 void
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325 tileset_file_finish(struct tileset_file *tf)
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326 {
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327 assert(tf);
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328
438
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329 mlk_alloc_pool_finish(&tf->tiledefs);
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330 mlk_alloc_pool_finish(&tf->anims[0]);
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331 mlk_alloc_pool_finish(&tf->anims[1]);
218
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332
215
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333 texture_finish(&tf->image);
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334
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335 memset(tf, 0, sizeof (*tf));
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336 }