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annotate src/map.c @ 41:3996f873a54b

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core: implement walksprite, closes #2455
author David Demelier <markand@malikania.fr>
date Wed, 15 Jan 2020 13:11:47 +0100
parents 83ae0e13c416
children 22a09a5ee476
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1 /*
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2 * map.c -- game map
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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 <stdio.h>
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21 #include <stdlib.h>
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22 #include <string.h>
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23
41
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24 #include "error.h"
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25 #include "error_p.h"
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26 #include "map.h"
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27 #include "image.h"
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28 #include "texture.h"
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29 #include "sprite.h"
41
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30 #include "painter.h"
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31
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32 #include <SDL.h>
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33
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34 /* Create %<v>c string literal for scanf */
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35 #define MAX_F(v) MAX_F_(v)
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36 #define MAX_F_(v) "%" #v "c"
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37
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38 static void
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39 parse_layer(struct map *map, const char *line, FILE *fp)
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40 {
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41 char layer_name[32 + 1] = { 0 };
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42 struct map_layer *layer;
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43 size_t amount, current;
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44
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45 /* Determine layer. */
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46 if (sscanf(line, "layer|%32s", layer_name) <= 0)
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47 return;
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48 if (strcmp(layer_name, "background") == 0)
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49 layer = &map->layers[0];
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50 else if (strcmp(layer_name, "foreground") == 0)
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51 layer = &map->layers[1];
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52 else
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53 return;
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54
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55 /* Check if weight/height has been specified. */
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56 if (map->width == 0 || map->height == 0)
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57 return;
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58
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59 amount = map->width * map->height;
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60 current = 0;
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61 if (!(layer->tiles = calloc(amount, sizeof (uint16_t))))
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62 return;
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63
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64 for (int tile; fscanf(fp, "%d", &tile) && current < amount; ++current)
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65 layer->tiles[current] = tile;
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66 }
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67
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68 static void
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69 parse_tileset(struct map *map, const char *line)
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70 {
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71 char filename[128 + 1] = { 0 };
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72 char path[512] = { 0 };
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73
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74 sscanf(line, "tileset|%128s", filename);
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75 snprintf(path, sizeof (path), "assets/tilesets/%s", filename);
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76
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77 if (!(map->tileset = image_openf(path)))
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78 return;
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79
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80 sprite_init(&map->sprite, map->tileset, map->tilewidth, map->tileheight);
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81 }
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82
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83 static void
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84 parse(struct map *map, const char *line, FILE *fp)
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85 {
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86 if (strncmp(line, "title", 5) == 0)
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87 sscanf(line, "title|" MAX_F(MAP_TITLE_MAX), map->title);
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88 else if (strncmp(line, "width", 5) == 0)
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89 sscanf(line, "width|%hu", &map->width);
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90 else if (strncmp(line, "height", 6) == 0)
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91 sscanf(line, "height|%hu", &map->height);
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92 else if (strncmp(line, "tilewidth", 9) == 0)
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93 sscanf(line, "tilewidth|%hhu", &map->tilewidth);
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94 else if (strncmp(line, "tileheight", 10) == 0)
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95 sscanf(line, "tileheight|%hhu", &map->tileheight);
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96 else if (strncmp(line, "tileset", 7) == 0)
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97 parse_tileset(map, line);
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98 else if (strncmp(line, "layer", 5) == 0)
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99 parse_layer(map, line, fp);
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100 }
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101
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102 static void
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103 draw_layer(struct map *map, const struct map_layer *layer)
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104 {
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105 assert(map);
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106 assert(layer);
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107
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108 int16_t x = 0, y = 0;
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109
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110 for (uint16_t r = 0; r < map->width; ++r) {
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111 for (uint16_t c = 0; c < map->height; ++c) {
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112 size_t si = r * map->width + c;
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113 size_t sr = (layer->tiles[si] - 1) / map->sprite.ncols;
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114 size_t sc = (layer->tiles[si] - 1) % map->sprite.nrows;
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115
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116 if (layer->tiles[si] != 0)
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117 sprite_draw(&map->sprite, sr, sc, x, y);
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118
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119 x += map->tilewidth;
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120 }
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121
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122 x = 0;
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123 y += map->tileheight;
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124 }
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125 }
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126
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127 bool
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128 map_open(struct map *map, const char *path)
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129 {
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130 assert(map);
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131 assert(path);
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132
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133 memset(map, 0, sizeof (struct map));
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134
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135 FILE *fp = fopen(path, "r");
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136 char line[BUFSIZ];
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137
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138 if (!fp)
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139 return false;
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140
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141 while (fgets(line, sizeof (line), fp)) {
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142 /* Remove \n if any */
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143 line[strcspn(line, "\n")] = '\0';
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144 parse(map, line, fp);
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145 }
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146
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147 fclose(fp);
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148
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149 if (map->width == 0 || map->tilewidth == 0)
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150 return error_printf("map width is null");
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151 if (map->height == 0 || map->tileheight == 0)
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152 return error_printf("map height is null");
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153
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154 size_t pw = map->width * map->tilewidth;
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155 size_t ph = map->height * map->tileheight;
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156
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157 if (!(map->picture = texture_new(pw, ph)))
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158 return error_sdl();
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159
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160 return true;
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161 }
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162
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163 void
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164 map_draw(struct map *map)
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165 {
41
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166 /* TODO: coordinates here */
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167 /* TODO: remove window size here */
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168 texture_draw_ex(
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169 map->picture,
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170 map->x,
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171 map->y,
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172 1024,
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173 576,
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174 0,
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175 0,
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176 1024,
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177 576,
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178 0
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179 );
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180 }
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181
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182 void
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183 map_repaint(struct map *map)
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184 {
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185 struct texture *old;
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186
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187 old = painter_get_target();
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188 painter_set_target(map->picture);
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189 draw_layer(map, &map->layers[0]);
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190 draw_layer(map, &map->layers[1]);
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191 painter_set_target(old);
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192 }
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193
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194 void
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195 map_view(struct map *map, uint64_t x, uint64_t y)
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196 {
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197 map->x = x;
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198 map->y = y;
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199 }
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200
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201 void
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202 map_close(struct map *map)
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203 {
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204 assert(map);
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205
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206 if (map->tileset)
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207 texture_close(map->tileset);
41
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208 if (map->picture)
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209 texture_close(map->picture);
27
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210
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211 free(map->layers[0].tiles);
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212 free(map->layers[1].tiles);
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213 }