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annotate libmlk-rpg/mlk/rpg/tileset.c @ 552:ffd972a3d084

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rpg: major rewrite of tilesets - Now tilesets can be opened using a custom allocator/loader. - A default mlk_tileset_loader_file implementation is provided. - Put a simple example-tileset example to demonstrate.
author David Demelier <markand@malikania.fr>
date Tue, 07 Mar 2023 20:45:00 +0100
parents 91ce23a36143
children
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1 /*
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2 * tileset.c -- map tileset definition
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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 <stdlib.h>
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21
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22 #include <mlk/core/animation.h>
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23 #include <mlk/core/sprite.h>
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24
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25 #include "tileset.h"
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26
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27 static inline int
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28 animation_cmp(const void *d1, const void *d2)
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29 {
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30 const struct mlk_tileset_animation *a1 = d1;
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31 const struct mlk_tileset_animation *a2 = d2;
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32
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33 if (a1->id < a2->id)
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34 return -1;
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35 if (a1->id > a2->id)
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36 return 1;
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37
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38 return 0;
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39 }
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40
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41 static inline const struct mlk_tileset_animation *
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42 find(const struct mlk_tileset *tileset, unsigned int r, unsigned int c)
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43 {
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44 const struct mlk_tileset_animation key = {
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45 .id = c + (r * tileset->sprite->ncols)
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46 };
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47
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48 return bsearch(&key, tileset->animations, tileset->animationsz, sizeof (key), animation_cmp);
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49 }
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50
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51 int
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52 mlk_tileset_ok(const struct mlk_tileset *tileset)
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53 {
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54 return tileset && mlk_sprite_ok(tileset->sprite);
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55 }
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56
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57 void
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58 mlk_tileset_start(struct mlk_tileset *tileset)
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59 {
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60 assert(mlk_tileset_ok(tileset));
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61
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62 struct mlk_tileset_animation *ta;
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63
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64 for (size_t i = 0; i < tileset->animationsz; ++i) {
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65 ta = &tileset->animations[i];
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67 if (ta->animation)
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68 mlk_animation_start(ta->animation);
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69 }
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70 }
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71
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72 void
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73 mlk_tileset_update(struct mlk_tileset *tileset, unsigned int ticks)
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74 {
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75 assert(mlk_tileset_ok(tileset));
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76
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77 struct mlk_tileset_animation *ta;
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78
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79 for (size_t i = 0; i < tileset->animationsz; ++i) {
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80 ta = &tileset->animations[i];
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81
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82 if (!ta->animation)
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83 continue;
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84
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85 /* Reset in case it ended, we loop animations. */
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86 if (mlk_animation_update(ta->animation, ticks))
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87 mlk_animation_start(ta->animation);
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88 }
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89 }
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90
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91 int
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92 mlk_tileset_draw(const struct mlk_tileset *tileset, unsigned int r, unsigned int c, int x, int y)
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93 {
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94 assert(mlk_tileset_ok(tileset));
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95
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96 const struct mlk_tileset_animation *ta;
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97 int ret;
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98
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99 if ((ta = find(tileset, r, c)))
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100 ret = mlk_animation_draw(ta->animation, x, y);
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101 else
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102 ret = mlk_sprite_draw(tileset->sprite, r, c, x, y);
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103
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104 return ret;
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105 }