Mercurial > molko
diff src/libmlk-core/core/sprite.c @ 320:8f9937403749
misc: improve loading of data
author | David Demelier <markand@malikania.fr> |
---|---|
date | Fri, 01 Oct 2021 20:30:00 +0200 |
parents | libmlk-core/core/sprite.c@d01e83210ca2 |
children | 460c78706989 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/libmlk-core/core/sprite.c Fri Oct 01 20:30:00 2021 +0200 @@ -0,0 +1,77 @@ +/* + * sprite.c -- image sprites + * + * Copyright (c) 2020-2021 David Demelier <markand@malikania.fr> + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include <assert.h> + +#include "sprite.h" +#include "texture.h" + +void +sprite_init(struct sprite *sprite, + struct texture *tex, + unsigned int cellw, + unsigned int cellh) +{ + assert(sprite); + assert(tex && texture_ok(tex)); + + sprite->texture = tex; + sprite->cellw = cellw; + sprite->cellh = cellh; + sprite->nrows = tex->h / cellh; + sprite->ncols = tex->w / cellw; +} + +int +sprite_ok(const struct sprite *sprite) +{ + return sprite && texture_ok(sprite->texture) && sprite->cellw != 0 && sprite->cellh != 0; +} + +int +sprite_draw(const struct sprite *sprite, unsigned int r, unsigned int c, int x, int y) +{ + return sprite_scale(sprite, r, c, x, y, sprite->cellw, sprite->cellh); +} + +int +sprite_scale(const struct sprite *sprite, + unsigned int r, + unsigned int c, + int x, + int y, + unsigned int w, + unsigned int h) +{ + assert(sprite_ok(sprite)); + assert(r < sprite->nrows); + assert(c < sprite->ncols); + + return texture_scale( + sprite->texture, + c * sprite->cellw, /* src y */ + r * sprite->cellh, /* src x */ + sprite->cellw, /* src width */ + sprite->cellh, /* src height */ + x, /* dst x */ + y, /* dst y */ + w, /* dst width */ + h, /* dst height */ + 0.0 /* angle */ + ); +}