Mercurial > molko
comparison src/libmlk-core/core/sprite.c @ 320:8f9937403749
misc: improve loading of data
author | David Demelier <markand@malikania.fr> |
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date | Fri, 01 Oct 2021 20:30:00 +0200 |
parents | libmlk-core/core/sprite.c@d01e83210ca2 |
children | 460c78706989 |
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319:b843eef4cc35 | 320:8f9937403749 |
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1 /* | |
2 * sprite.c -- image sprites | |
3 * | |
4 * Copyright (c) 2020-2021 David Demelier <markand@malikania.fr> | |
5 * | |
6 * Permission to use, copy, modify, and/or distribute this software for any | |
7 * purpose with or without fee is hereby granted, provided that the above | |
8 * copyright notice and this permission notice appear in all copies. | |
9 * | |
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
17 */ | |
18 | |
19 #include <assert.h> | |
20 | |
21 #include "sprite.h" | |
22 #include "texture.h" | |
23 | |
24 void | |
25 sprite_init(struct sprite *sprite, | |
26 struct texture *tex, | |
27 unsigned int cellw, | |
28 unsigned int cellh) | |
29 { | |
30 assert(sprite); | |
31 assert(tex && texture_ok(tex)); | |
32 | |
33 sprite->texture = tex; | |
34 sprite->cellw = cellw; | |
35 sprite->cellh = cellh; | |
36 sprite->nrows = tex->h / cellh; | |
37 sprite->ncols = tex->w / cellw; | |
38 } | |
39 | |
40 int | |
41 sprite_ok(const struct sprite *sprite) | |
42 { | |
43 return sprite && texture_ok(sprite->texture) && sprite->cellw != 0 && sprite->cellh != 0; | |
44 } | |
45 | |
46 int | |
47 sprite_draw(const struct sprite *sprite, unsigned int r, unsigned int c, int x, int y) | |
48 { | |
49 return sprite_scale(sprite, r, c, x, y, sprite->cellw, sprite->cellh); | |
50 } | |
51 | |
52 int | |
53 sprite_scale(const struct sprite *sprite, | |
54 unsigned int r, | |
55 unsigned int c, | |
56 int x, | |
57 int y, | |
58 unsigned int w, | |
59 unsigned int h) | |
60 { | |
61 assert(sprite_ok(sprite)); | |
62 assert(r < sprite->nrows); | |
63 assert(c < sprite->ncols); | |
64 | |
65 return texture_scale( | |
66 sprite->texture, | |
67 c * sprite->cellw, /* src y */ | |
68 r * sprite->cellh, /* src x */ | |
69 sprite->cellw, /* src width */ | |
70 sprite->cellh, /* src height */ | |
71 x, /* dst x */ | |
72 y, /* dst y */ | |
73 w, /* dst width */ | |
74 h, /* dst height */ | |
75 0.0 /* angle */ | |
76 ); | |
77 } |