--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libmlk-rpg/mlk/rpg/tileset.c	Sat Oct 15 21:24:17 2022 +0200
@@ -0,0 +1,93 @@
+/*
+ * tileset.c -- map tileset definition
+ *
+ * Copyright (c) 2020-2022 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 <stdlib.h>
+
+#include <mlk/core/animation.h>
+#include <mlk/core/sprite.h>
+
+#include "tileset.h"
+
+static inline int
+anim_cmp(const void *d1, const void *d2)
+{
+	const struct tileset_animation *mtd1 = d1;
+	const struct tileset_animation *mtd2 = d2;
+
+	if (mtd1->id < mtd2->id)
+		return -1;
+	if (mtd1->id > mtd2->id)
+		return 1;
+
+	return 0;
+}
+
+static inline const struct tileset_animation *
+find(const struct tileset *ts, unsigned int r, unsigned int c)
+{
+	const struct tileset_animation key = {
+		.id = c + (r * ts->sprite->ncols)
+	};
+
+	return bsearch(&key, ts->anims, ts->animsz, sizeof (key), anim_cmp);
+}
+
+int
+tileset_ok(const struct tileset *ts)
+{
+	return ts && sprite_ok(ts->sprite);
+}
+
+void
+tileset_start(struct tileset *ts)
+{
+	for (size_t i = 0; i < ts->animsz; ++i) {
+		struct tileset_animation *ta = &ts->anims[i];
+
+		if (ta->animation)
+			animation_start(ta->animation);
+	}
+}
+
+void
+tileset_update(struct tileset *ts, unsigned int ticks)
+{
+	for (size_t i = 0; i < ts->animsz; ++i) {
+		struct tileset_animation *ta = &ts->anims[i];
+
+		if (!ta->animation)
+			continue;
+
+		if (animation_update(ta->animation, ticks))
+			animation_start(ta->animation);
+	}
+}
+
+void
+tileset_draw(const struct tileset *ts, unsigned int r, unsigned int c, int x, int y)
+{
+	assert(ts);
+
+	const struct tileset_animation *ta;
+
+	if ((ta = find(ts, r, c)))
+		animation_draw(ta->animation, x, y);
+	else
+		sprite_draw(ts->sprite, r, c, x, y);
+}