--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libcore/core/animation.c	Mon Oct 05 13:25:06 2020 +0200
@@ -0,0 +1,84 @@
+/*
+ * animation.c -- basic animations
+ *
+ * Copyright (c) 2020 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 "animation.h"
+#include "sprite.h"
+
+void
+animation_init(struct animation *an, struct sprite *sprite, unsigned int delay)
+{
+	assert(an);
+	assert(sprite);
+
+	an->sprite = sprite;
+	an->row = 0;
+	an->column = 0;
+	an->delay = delay;
+	an->elapsed = 0;
+}
+
+bool
+animation_is_complete(const struct animation *an)
+{
+	assert(an);
+
+	return an->row == an->sprite->nrows &&
+	       an->column == an->sprite->ncols &&
+	       an->elapsed >= an->delay;
+}
+
+void
+animation_start(struct animation *an)
+{
+	assert(an);
+
+	an->row = 0;
+	an->column = 0;
+	an->elapsed = 0;
+}
+
+void
+animation_update(struct animation *an, unsigned int ticks)
+{
+	assert(an);
+
+	an->elapsed += ticks;
+
+	if (an->elapsed < an->delay)
+		return;
+
+	/* Increment column first */
+	if (++an->column >= an->sprite->ncols) {
+		/*
+		 * Increment row, if we reach the last row it means we are
+		 * at the last frame.
+		 */
+		if (++an->row >= an->sprite->nrows)
+			an->row = an->sprite->nrows;
+		else
+			an->column = 0;
+	}
+}
+
+void
+animation_draw(struct animation *an, int x, int y)
+{
+	sprite_draw(an->sprite, an->row, an->column, x, y);
+}