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annotate libmlk-core/core/sprite.c @ 314:d01e83210ca2

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misc: update years
author David Demelier <markand@malikania.fr>
date Wed, 22 Sep 2021 07:22:20 +0200
parents 196264679079
children
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1 /*
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2 * sprite.c -- image sprites
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3 *
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4 * Copyright (c) 2020-2021 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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21 #include "sprite.h"
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22 #include "texture.h"
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23
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24 void
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25 sprite_init(struct sprite *sprite,
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26 struct texture *tex,
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27 unsigned int cellw,
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28 unsigned int cellh)
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29 {
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30 assert(sprite);
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31 assert(tex && texture_ok(tex));
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32
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33 sprite->texture = tex;
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34 sprite->cellw = cellw;
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35 sprite->cellh = cellh;
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36 sprite->nrows = tex->h / cellh;
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37 sprite->ncols = tex->w / cellw;
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38 }
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40 int
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41 sprite_ok(const struct sprite *sprite)
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42 {
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43 return sprite && texture_ok(sprite->texture) && sprite->cellw != 0 && sprite->cellh != 0;
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44 }
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46 int
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47 sprite_draw(const struct sprite *sprite, unsigned int r, unsigned int c, int x, int y)
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48 {
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49 return sprite_scale(sprite, r, c, x, y, sprite->cellw, sprite->cellh);
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50 }
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51
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52 int
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53 sprite_scale(const struct sprite *sprite,
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54 unsigned int r,
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55 unsigned int c,
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56 int x,
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57 int y,
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58 unsigned int w,
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59 unsigned int h)
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60 {
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61 assert(sprite_ok(sprite));
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62 assert(r < sprite->nrows);
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63 assert(c < sprite->ncols);
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65 return texture_scale(
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66 sprite->texture,
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67 c * sprite->cellw, /* src y */
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68 r * sprite->cellh, /* src x */
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69 sprite->cellw, /* src width */
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70 sprite->cellh, /* src height */
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71 x, /* dst x */
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72 y, /* dst y */
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73 w, /* dst width */
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74 h, /* dst height */
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75 0.0 /* angle */
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76 );
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77 }