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annotate examples/example-action/chest.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 95792046d3d2
children
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1 /*
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2 * chest.c -- animated chest
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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
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21 #include <mlk/core/event.h>
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22 #include <mlk/core/maths.h>
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23 #include <mlk/core/sound.h>
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24 #include <mlk/core/sprite.h>
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25
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26 #include <mlk/example/registry.h>
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27
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28 #include "chest.h"
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29
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30 #define CHEST_DELAY 80
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31
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32 static void
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33 handle(struct mlk_action *act, const union mlk_event *ev)
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34 {
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35 struct chest *chest = act->data;
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36 unsigned int cw, ch;
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37
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38 /* Make sure that we don't operate on a already opened chest. */
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39 if (chest->state == CHEST_STATE_OPENED)
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40 return;
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41
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42 /*
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43 * We are only interested if the event is a click on the chest itself
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44 * so we have to test because actions have no notion of geometry.
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45 */
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46 if (ev->type != MLK_EVENT_CLICKDOWN)
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47 return;
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48
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49 cw = mlk_registry_sprites[MLK_REGISTRY_TEXTURE_CHEST].cellw;
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50 ch = mlk_registry_sprites[MLK_REGISTRY_TEXTURE_CHEST].cellh;
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51
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52 if (!mlk_maths_is_boxed(ev->click.x, ev->click.y, chest->x, chest->y, cw, ch))
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53 return;
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54
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55 mlk_sound_play(&mlk_registry_sounds[MLK_REGISTRY_SOUND_OPEN_CHEST]);
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56 mlk_animation_start(&chest->animation);
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57
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58 chest->state = CHEST_STATE_OPENING;
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59 }
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60
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61 static int
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62 update(struct mlk_action *act, unsigned int ticks)
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63 {
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64 struct chest *chest = act->data;
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65
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66 if (chest->state != CHEST_STATE_OPENING)
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67 return 0;
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68
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69 if (mlk_animation_update(&chest->animation, ticks)) {
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70 chest->state = CHEST_STATE_OPENED;
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71
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72 if (chest->run)
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73 chest->run(chest);
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74 }
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75
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76 /* The chest never dies. */
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77 return 0;
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78 }
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79
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80 static void
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81 draw(struct mlk_action *act)
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82 {
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83 const struct chest *chest = act->data;
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84
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85 switch (chest->state) {
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86 case CHEST_STATE_CLOSED:
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87 mlk_sprite_draw(chest->animation.sprite, 0, 0, chest->x, chest->y);
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88 break;
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89 case CHEST_STATE_OPENING:
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90 mlk_animation_draw(&chest->animation, chest->x, chest->y);
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91 break;
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92 case CHEST_STATE_OPENED:
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93 mlk_sprite_draw(chest->animation.sprite,
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94 chest->animation.sprite->nrows - 1,
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95 chest->animation.sprite->ncols - 1,
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96 chest->x,
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97 chest->y);
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98 break;
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99 default:
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100 break;
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101 }
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102 }
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103
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104 struct mlk_action *
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105 chest_init(struct chest *chest)
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106 {
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107 assert(chest);
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108
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109 chest->state = CHEST_STATE_CLOSED;
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110 chest->animation.sprite = &mlk_registry_sprites[MLK_REGISTRY_TEXTURE_CHEST];
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111 chest->animation.delay = CHEST_DELAY;
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112 chest->action.data = chest;
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113 chest->action.handle = handle;
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114 chest->action.update = update;
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115 chest->action.draw = draw;
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116
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117 return &chest->action;
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118 }