1 files changed, 70 insertions, 0 deletions
diff --git a/layer.cpp b/layer.cpp
new file mode 100644
index 0000000..89f437f
--- /dev/null
+++ b/layer.cpp
@@ -0,0 +1,70 @@
+#include <string.h>
+
+#include <SDL.h>
+
+#include "osc_graphics.h"
+#include "layer.h"
+
+#define FOREACH_LAYER(VAR) \
+	for (Layer *VAR = head; VAR; VAR = VAR->next)
+
+void
+LayerList::insert(int pos, Layer *layer)
+{
+	Layer *cur, *prev = NULL;
+
+	lock();
+
+	for (cur = head; cur && pos; prev = cur, cur = cur->next, pos--);
+
+	layer->next = cur;
+	if (prev)
+		prev->next = layer;
+	else
+		head = layer;
+
+	unlock();
+}
+
+bool
+LayerList::delete_by_name(const char *name)
+{
+	Layer *prev = NULL;
+
+	lock();
+
+	FOREACH_LAYER(cur) {
+		if (!strcmp(cur->name, name)) {
+			if (prev)
+				prev->next = cur->next;
+			else
+				head = cur->next;
+			delete cur;
+
+			unlock();
+			return false;
+		}
+
+		prev = cur;
+	}
+
+	unlock();
+
+	return true;
+}
+
+void
+LayerList::render(SDL_Surface *target)
+{
+	SDL_FillRect(target, NULL, SDL_MapRGB(target->format, 0, 0, 0));
+
+	lock();
+
+	FOREACH_LAYER(cur) {
+		cur->lock();
+		cur->frame(target);
+		cur->unlock();
+	}
+
+	unlock();
+}