1 files changed, 72 insertions, 0 deletions
diff --git a/src/layer.cpp b/src/layer.cpp
new file mode 100644
index 0000000..fdb3a3d
--- /dev/null
+++ b/src/layer.cpp
@@ -0,0 +1,72 @@
+#include <string.h>
+#include <bsd/sys/queue.h>
+
+#include <SDL.h>
+
+#include "osc_graphics.h"
+#include "osc_server.h"
+#include "layer.h"
+
+Layer::Layer(const char *_name) : mutex(SDL_CreateMutex()), name(strdup(_name))
+{
+	geo_osc_id = register_method("geo", GEO_TYPES, geo_osc);
+	alpha_osc_id = register_method("alpha", "f", alpha_osc);
+}
+
+void
+LayerList::insert(int pos, Layer *layer)
+{
+	Layer *cur, *prev = NULL;
+
+	lock();
+
+	LIST_FOREACH(cur, &head, layers) {
+		if (!pos--)
+			break;
+		prev = cur;
+	}
+
+	if (prev)
+		LIST_INSERT_AFTER(prev, layer, layers);
+	else
+		LIST_INSERT_HEAD(&head, layer, layers);
+
+	unlock();
+}
+
+void
+LayerList::delete_layer(Layer *layer)
+{
+	lock();
+	LIST_REMOVE(layer, layers);
+	unlock();
+
+	/* layer is guaranteed not to be rendered */
+	delete layer;
+}
+
+void
+LayerList::render(SDL_Surface *target)
+{
+	SDL_FillRect(target, NULL, SDL_MapRGB(target->format, 0, 0, 0));
+
+	lock();
+
+	Layer *cur;
+	LIST_FOREACH(cur, &head, layers) {
+		cur->lock();
+		cur->frame(target);
+		cur->unlock();
+	}
+
+	unlock();
+}
+
+Layer::~Layer()
+{
+	unregister_method(alpha_osc_id);
+	unregister_method(geo_osc_id);
+
+	free(name);
+	SDL_DestroyMutex(mutex);
+}