rootston: damage whole output when entering/leaving fullscreen

include/rootston/output.h

@@ -39,6 +39,7 @@ void output_remove_notify(struct wl_listener *listener, void *data);
 struct roots_view;
 struct roots_drag_icon;
 
+void output_damage_whole(struct roots_output *output);
 void output_damage_whole_view(struct roots_output *output,
 	struct roots_view *view);
 void output_damage_from_view(struct roots_output *output,

rootston/desktop.c

@@ -243,6 +243,7 @@ void view_set_fullscreen(struct roots_view *view, bool fullscreen,
 
 		roots_output->fullscreen_view = view;
 		view->fullscreen_output = roots_output;
+		output_damage_whole(roots_output);
 	}
 
 	if (was_fullscreen && !fullscreen) {
@@ -250,6 +251,7 @@ void view_set_fullscreen(struct roots_view *view, bool fullscreen,
 			view->saved.height);
 		view_rotate(view, view->saved.rotation);
 
+		output_damage_whole(view->fullscreen_output);
 		view->fullscreen_output->fullscreen_view = NULL;
 		view->fullscreen_output = NULL;
 	}

rootston/output.c

@@ -493,7 +493,7 @@ static void output_handle_frame(struct wl_listener *listener, void *data) {
 	render_output(output);
 }
 
-static void output_damage_whole(struct roots_output *output) {
+void output_damage_whole(struct roots_output *output) {
 	int width, height;
 	wlr_output_transformed_resolution(output->wlr_output, &width, &height);