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annotate examples/example-drawable/main.c @ 381:f48367c5a92e

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core: remove useless alext.h
author David Demelier <markand@malikania.fr>
date Fri, 07 Jan 2022 21:50:37 +0100
parents 460c78706989
children ae2dcf40c1eb
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1 /*
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2 * example-drawable.c -- example on how to use automatic drawables
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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 <stdio.h>
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20 #include <stdlib.h>
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21
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22 #include <core/alloc.h>
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23 #include <core/animation.h>
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24 #include <core/core.h>
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25 #include <core/event.h>
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26 #include <core/game.h>
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27 #include <core/drawable.h>
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28 #include <core/drawable-stack.h>
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29 #include <core/key.h>
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30 #include <core/painter.h>
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31 #include <core/panic.h>
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32 #include <core/sys.h>
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33 #include <core/image.h>
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34 #include <core/sprite.h>
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35 #include <core/state.h>
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36 #include <core/texture.h>
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37 #include <core/util.h>
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38 #include <core/window.h>
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39
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40 #include <ui/label.h>
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41 #include <ui/theme.h>
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42 #include <ui/ui.h>
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43
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44 #include <assets/sprites/explosion.h>
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45
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46 #define W 1280
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47 #define H 720
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48
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49 static struct label help = {
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50 .x = 10,
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51 .y = 10,
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52 .text = "Keys: <Esc> to reset. Click anywhere to spawn a drawable.",
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53 .flags = LABEL_FLAGS_SHADOW
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54 };
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55
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56 static struct drawable_stack stack;
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57
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58 /*
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59 * List of drawables for this example.
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60 * -----------------------------------------------------------------------------
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61 */
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62
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63 /* 0: Explosion animation. */
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64 static struct texture explosion_tex;
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65 static struct sprite explosion_sprite;
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66
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67 struct explosion {
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68 struct animation anim;
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69 struct drawable dw;
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70 };
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71
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72 static void
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73 init(void)
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74 {
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75 if (core_init("fr.malikania", "example-drawable") < 0 || ui_init() < 0)
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76 panic();
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77 if (window_open("Example - Drawable", W, H) < 0)
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78 panic();
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79
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80 /* 0: Explosion animation. */
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81 if (image_openmem(&explosion_tex, assets_sprites_explosion, sizeof (assets_sprites_explosion)) < 0)
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82 panic();
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83
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84 sprite_init(&explosion_sprite, &explosion_tex, 256, 256);
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85 }
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86
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87 static int
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88 explosion_update(struct drawable *dw, unsigned int ticks)
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89 {
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90 struct explosion *ex = dw->data;
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91
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92 return animation_update(&ex->anim, ticks);
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93 }
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94
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95 static void
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96 explosion_draw(struct drawable *dw)
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97 {
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98 struct explosion *ex = dw->data;
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99
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100 animation_draw(&ex->anim, ex->dw.x, ex->dw.y);
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101 }
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102
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103 static void
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104 explosion_finish(struct drawable *dw)
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105 {
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106 free(dw->data);
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107 }
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108
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109 static void
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110 spawn(int x, int y)
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111 {
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112 struct explosion *ex = alloc_new0(sizeof (*ex));
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113
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114 animation_init(&ex->anim, &explosion_sprite, 15);
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115
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116 ex->dw.data = ex;
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117 ex->dw.x = x - (int)(explosion_sprite.cellw / 2);
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118 ex->dw.y = y - (int)(explosion_sprite.cellh / 2);
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119 ex->dw.update = explosion_update;
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120 ex->dw.draw = explosion_draw;
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121 ex->dw.finish = explosion_finish;
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122
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123 drawable_stack_add(&stack, &ex->dw);
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124 }
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125
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126 static void
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127 handle(struct state *st, const union event *ev)
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128 {
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129 (void)st;
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130
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131 switch (ev->type) {
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132 case EVENT_KEYDOWN:
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133 switch (ev->key.key) {
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134 case KEY_ESCAPE:
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135 drawable_stack_finish(&stack);
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136 break;
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137 default:
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138 break;
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139 }
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140 break;
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141 case EVENT_CLICKDOWN:
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142 spawn(ev->click.x, ev->click.y);
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143 break;
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144 case EVENT_QUIT:
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145 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 }
136
30b68089ae70 core: rework actions and a bit of drawables, closes #2492
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151
207
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152 static void
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153 update(struct 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 drawable_stack_update(&stack, ticks);
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158
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159 }
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160
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161 static void
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162 draw(struct state *st)
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163 {
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164 (void)st;
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165
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166 painter_set_color(0xebede9ff);
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167 painter_clear();
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168 label_draw(&help);
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169 drawable_stack_draw(&stack);
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170 painter_present();
129
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171 }
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172
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173 static void
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174 run(void)
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175 {
207
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176 struct state state = {
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177 .handle = handle,
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178 .update = update,
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179 .draw = draw
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180 };
129
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181
300
3638b39ef2bf examples: fix with new game_push function
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182 game_push(&state);
207
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183 game_loop();
129
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184 }
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185
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186 static void
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187 quit(void)
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188 {
156
c3a40062acc2 misc: create more generic startup function, closes #2500
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189 window_finish();
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190 ui_finish();
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191 core_finish();
129
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192 }
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193
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194 int
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195 main(int argc, char **argv)
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196 {
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197 (void)argc;
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198 (void)argv;
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199
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200 init();
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201 run();
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David Demelier <markand@malikania.fr>
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202 quit();
9301c7c84471 core: implement basic drawables, closes #2491 @1h
David Demelier <markand@malikania.fr>
parents:
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203 }