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annotate examples/example-tileset/example-tileset.c @ 630:8d8fe99b357c

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core: fix buffer overflow in sndfile
author David Demelier <markand@malikania.fr>
date Sun, 27 Aug 2023 11:04:57 +0200
parents fee7bd30725c
children bb67f935a93f
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1 /*
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2 * example-tileset.c -- example on how to use a tileset
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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 <stdio.h>
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21 #include <string.h>
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22
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23 #include <mlk/util/util.h>
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24
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25 #include <mlk/core/animation.h>
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26 #include <mlk/core/core.h>
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27 #include <mlk/core/err.h>
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28 #include <mlk/core/event.h>
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29 #include <mlk/core/game.h>
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30 #include <mlk/core/image.h>
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31 #include <mlk/core/key.h>
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32 #include <mlk/core/painter.h>
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33 #include <mlk/core/panic.h>
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34 #include <mlk/core/state.h>
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35 #include <mlk/core/sys.h>
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36 #include <mlk/core/trace.h>
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37 #include <mlk/core/util.h>
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38 #include <mlk/core/window.h>
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39
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40 #include <mlk/ui/label.h>
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41 #include <mlk/ui/ui.h>
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42
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43 #include <mlk/rpg/tileset-loader-file.h>
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44 #include <mlk/rpg/tileset-loader.h>
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45 #include <mlk/rpg/tileset.h>
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46
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47 #include <mlk/example/example.h>
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48 #include <mlk/example/registry.h>
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49
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50 #include <assets/tilesets/world.h>
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51
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52 static struct mlk_tileset_loader_file loader;
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53 static struct mlk_tileset tileset;
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54
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55 /*
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56 * This is only to demonstrate how we can custom-allocate data, you can skip
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57 * that part.
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58 */
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59 static struct mlk_sprite sprites[16];
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60 static size_t spritesz;
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61 static struct mlk_animation animations[16];
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62 static size_t animationsz;
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63
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64 static const struct {
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65 const char *basename;
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66 struct mlk_texture *texture;
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67 } table_textures[] = {
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68 { "world.png", &mlk_registry_textures[MLK_REGISTRY_TEXTURE_WORLD] },
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69 { "animation-water.png", &mlk_registry_textures[MLK_REGISTRY_TEXTURE_WATER] },
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70 { NULL, NULL }
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71 };
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72
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73 static struct mlk_texture *
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74 new_texture(struct mlk_tileset_loader *loader, struct mlk_tileset *tileset, const char *ident)
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75 {
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76 (void)loader;
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77 (void)tileset;
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78
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79 char filepath[MLK_PATH_MAX], filename[FILENAME_MAX + 1];
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80
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81 mlk_util_strlcpy(filepath, ident, sizeof (filepath));
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82 mlk_util_strlcpy(filename, mlk_util_basename(filepath), sizeof (filename));
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83 mlk_tracef("Searching for texture %s", filename);
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84
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85 for (size_t i = 0; table_textures[i].basename != NULL; ++i)
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86 if (strcmp(table_textures[i].basename, filename) == 0)
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87 return table_textures[i].texture;
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88
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89 return NULL;
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90 }
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91
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92 static struct mlk_sprite *
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93 new_sprite(struct mlk_tileset_loader *loader, struct mlk_tileset *tileset)
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94 {
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95 (void)loader;
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96 (void)tileset;
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97
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98 /* Just ensure we haven't reach the limit. */
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99 assert(spritesz < MLK_UTIL_SIZE(sprites));
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100
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101 return &sprites[spritesz++];
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102 }
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103
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104 static struct mlk_animation *
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105 new_animation(struct mlk_tileset_loader *loader, struct mlk_tileset *tileset)
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106 {
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107 (void)loader;
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108 (void)tileset;
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109
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110 /* Just ensure we haven't reach the limit. */
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111 assert(animationsz < MLK_UTIL_SIZE(animations));
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112
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113 return &animations[animationsz++];
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114 }
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115
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116 static void
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117 init(void)
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118 {
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119 if (mlk_example_init("example-tileset") < 0)
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120 mlk_panic();
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121
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122 /*
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123 * Demonstrate how we can override functions to use different resources
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124 * and/or allocations.
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125 *
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126 * Images are loaded from the libmlk-example registry from RAM and
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127 * sprites animations are statically allocated.
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128 */
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129 mlk_tileset_loader_file_init(&loader, "");
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130 loader.iface.new_texture = new_texture;
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131 loader.iface.new_sprite = new_sprite;
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132 loader.iface.new_animation = new_animation;
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133
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134 if (mlk_tileset_loader_openmem(&loader.iface, &tileset, assets_tilesets_world, sizeof (assets_tilesets_world)) < 0)
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135 mlk_panic();
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136 }
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137
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138 static void
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139 handle(struct mlk_state *st, const union mlk_event *ev)
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140 {
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141 (void)st;
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142
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143 switch (ev->type) {
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144 case MLK_EVENT_QUIT:
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145 mlk_game_quit();
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146 break;
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147 default:
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148 break;
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149 }
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150 }
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151
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152 static void
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153 update(struct mlk_state *st, unsigned int ticks)
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154 {
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155 (void)st;
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156
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157 mlk_tileset_update(&tileset, ticks);
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158 }
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159
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160 static void
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161 draw(struct mlk_state *st)
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162 {
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163 (void)st;
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164
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165 int nc, nr;
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166
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167 mlk_painter_set_color(MLK_EXAMPLE_BG);
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168 mlk_painter_clear();
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169
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170 /*
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171 * Draw the animated tile all over the screen.
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172 */
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173 nc = (MLK_EXAMPLE_W / tileset.sprite->cellw) + 1;
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174 nr = (MLK_EXAMPLE_H / tileset.sprite->cellh) + 1;
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175
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176 for (int r = 0; r < nr; ++r) {
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177 for (int c = 0; c < nc; ++c) {
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178 mlk_tileset_draw(&tileset, 7, 22,
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179 c * tileset.sprite->cellw,
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180 r * tileset.sprite->cellh);
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181 }
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182 }
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183
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184 mlk_painter_present();
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185 }
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186
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187 static void
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188 run(void)
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189 {
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190 struct mlk_state state = {
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191 .handle = handle,
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192 .update = update,
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193 .draw = draw
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194 };
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195
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196 mlk_game_init();
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197 mlk_game_push(&state);
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198 mlk_game_loop();
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199 }
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200
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201 static void
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202 quit(void)
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203 {
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204 mlk_tileset_loader_file_finish(&loader);
552
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205 mlk_example_finish();
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206 }
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207
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208 int
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209 main(int argc, char **argv)
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210 {
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211 (void)argc;
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212 (void)argv;
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213
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214 init();
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215 run();
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216 quit();
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217 }