2 files changed, 47 insertions, 14 deletions

diff --git a/include/rootston/output.h b/include/rootston/output.h
index 3a6d3cc7..7f42904f 100644
--- a/include/rootston/output.h
+++ b/include/rootston/output.h
@@ -4,13 +4,7 @@
 #include <time.h>
 #include <pixman.h>
 #include <wayland-server.h>
-
-/**
- * Damage tracking requires to keep track of previous frames' damage. To allow
- * damage tracking to work with triple buffering, a history of two frames is
- * required.
- */
-#define ROOTS_OUTPUT_PREVIOUS_DAMAGE_LEN 2
+#include <wlr/types/wlr_output_damage.h>
 
 struct roots_desktop;
 
@@ -22,15 +16,9 @@ struct roots_output {
 	struct roots_view *fullscreen_view;
 
 	struct timespec last_frame;
-	pixman_region32_t damage; // in ouput-local coordinates
-
-	// circular queue for previous damage
-	pixman_region32_t previous_damage[ROOTS_OUTPUT_PREVIOUS_DAMAGE_LEN];
-	size_t previous_damage_idx;
+	struct wlr_output_damage *damage;
 
 	struct wl_listener frame;
-	struct wl_listener mode;
-	struct wl_listener needs_swap;
 };
 
 void output_add_notify(struct wl_listener *listener, void *data);
diff --git a/include/wlr/types/wlr_output_damage.h b/include/wlr/types/wlr_output_damage.h
new file mode 100644
index 00000000..eadbff29
--- /dev/null
+++ b/include/wlr/types/wlr_output_damage.h
@@ -0,0 +1,45 @@
+#ifndef WLR_TYPES_WLR_OUTPUT_DAMAGE_H
+#define WLR_TYPES_WLR_OUTPUT_DAMAGE_H
+
+#include <pixman.h>
+
+/**
+ * Damage tracking requires to keep track of previous frames' damage. To allow
+ * damage tracking to work with triple buffering, a history of two frames is
+ * required.
+ */
+#define WLR_OUTPUT_DAMAGE_PREVIOUS_LEN 2
+
+struct wlr_output_damage {
+	struct wlr_output *output;
+
+	pixman_region32_t current; // in output-local coordinates
+
+	// circular queue for previous damage
+	pixman_region32_t previous[WLR_OUTPUT_DAMAGE_PREVIOUS_LEN];
+	size_t previous_idx;
+
+	struct {
+		struct wl_signal frame;
+		struct wl_signal destroy;
+	} events;
+
+	struct wl_listener output_destroy;
+	struct wl_listener output_mode;
+	struct wl_listener output_needs_swap;
+	struct wl_listener output_frame;
+};
+
+struct wlr_output_damage *wlr_output_damage_create(struct wlr_output *output);
+void wlr_output_damage_destroy(struct wlr_output_damage *output_damage);
+bool wlr_output_damage_make_current(struct wlr_output_damage *output_damage,
+	bool *needs_swap, pixman_region32_t *damage);
+bool wlr_output_damage_swap_buffers(struct wlr_output_damage *output_damage,
+	struct timespec *when, pixman_region32_t *damage);
+void wlr_output_damage_add(struct wlr_output_damage *output_damage,
+	pixman_region32_t *damage);
+void wlr_output_damage_add_whole(struct wlr_output_damage *output_damage);
+void wlr_output_damage_add_box(struct wlr_output_damage *output_damage,
+	struct wlr_box *box);
+
+#endif