output_damage: listen to transform and scale output events

include/wlr/types/wlr_output_damage.h

@@ -1,7 +1,9 @@
 #ifndef WLR_TYPES_WLR_OUTPUT_DAMAGE_H
 #define WLR_TYPES_WLR_OUTPUT_DAMAGE_H
 
+#include <time.h>
 #include <pixman.h>
+#include <wlr/types/wlr_output.h>
 
 /**
  * Damage tracking requires to keep track of previous frames' damage. To allow
@@ -34,6 +36,8 @@ struct wlr_output_damage {
 
 	struct wl_listener output_destroy;
 	struct wl_listener output_mode;
+	struct wl_listener output_transform;
+	struct wl_listener output_scale;
 	struct wl_listener output_needs_swap;
 	struct wl_listener output_frame;
 };

types/wlr_output_damage.c

@@ -18,6 +18,18 @@ static void output_handle_mode(struct wl_listener *listener, void *data) {
 	wlr_output_damage_add_whole(output_damage);
 }
 
+static void output_handle_transform(struct wl_listener *listener, void *data) {
+	struct wlr_output_damage *output_damage =
+		wl_container_of(listener, output_damage, output_transform);
+	wlr_output_damage_add_whole(output_damage);
+}
+
+static void output_handle_scale(struct wl_listener *listener, void *data) {
+	struct wlr_output_damage *output_damage =
+		wl_container_of(listener, output_damage, output_scale);
+	wlr_output_damage_add_whole(output_damage);
+}
+
 static void output_handle_needs_swap(struct wl_listener *listener, void *data) {
 	struct wlr_output_damage *output_damage =
 		wl_container_of(listener, output_damage, output_needs_swap);
@@ -57,6 +69,10 @@ struct wlr_output_damage *wlr_output_damage_create(struct wlr_output *output) {
 	output_damage->output_destroy.notify = output_handle_destroy;
 	wl_signal_add(&output->events.mode, &output_damage->output_mode);
 	output_damage->output_mode.notify = output_handle_mode;
+	wl_signal_add(&output->events.transform, &output_damage->output_transform);
+	output_damage->output_transform.notify = output_handle_transform;
+	wl_signal_add(&output->events.scale, &output_damage->output_scale);
+	output_damage->output_scale.notify = output_handle_scale;
 	wl_signal_add(&output->events.needs_swap, &output_damage->output_needs_swap);
 	output_damage->output_needs_swap.notify = output_handle_needs_swap;
 	wl_signal_add(&output->events.frame, &output_damage->output_frame);
@@ -72,6 +88,8 @@ void wlr_output_damage_destroy(struct wlr_output_damage *output_damage) {
 	wl_signal_emit(&output_damage->events.destroy, output_damage);
 	wl_list_remove(&output_damage->output_destroy.link);
 	wl_list_remove(&output_damage->output_mode.link);
+	wl_list_remove(&output_damage->output_transform.link);
+	wl_list_remove(&output_damage->output_scale.link);
 	wl_list_remove(&output_damage->output_needs_swap.link);
 	wl_list_remove(&output_damage->output_frame.link);
 	pixman_region32_fini(&output_damage->current);