Implement buffer.damage in shm, use it in window.c

clients/smoke.c

@@ -199,6 +199,8 @@ frame_callback(struct wl_surface *surface, void *data, uint32_t time)
 
 	render(smoke);
 
+	display_surface_damage(smoke->display, smoke->surface,
+			       0, 0, smoke->width, smoke->height);
 	window_damage(smoke->window, 0, 0, smoke->width, smoke->height);
 	wl_display_frame_callback(display_get_display(smoke->display),
 				  window_get_wl_surface(smoke->window),

clients/window.c

@@ -734,8 +734,21 @@ window_attach_surface(struct window *window)
 void
 window_flush(struct window *window)
 {
-       if (window->cairo_surface)
-	       window_attach_surface(window);
+	if (window->cairo_surface) {
+		switch (window->buffer_type) {
+		case WINDOW_BUFFER_TYPE_EGL_IMAGE:
+		case WINDOW_BUFFER_TYPE_SHM:
+			display_surface_damage(window->display,
+					       window->cairo_surface,
+					       0, 0,
+					       window->allocation.width,
+					       window->allocation.height);
+			break;
+		default:
+			break;
+		}
+		window_attach_surface(window);
+	}
 }
 
 void
@@ -1420,6 +1433,17 @@ window_get_title(struct window *window)
 	return window->title;
 }
 
+void
+display_surface_damage(struct display *display, cairo_surface_t *cairo_surface,
+		       int32_t x, int32_t y, int32_t width, int32_t height)
+{
+	struct wl_buffer *buffer;
+
+	buffer = display_get_buffer_for_surface(display, cairo_surface);
+
+	wl_buffer_damage(buffer, x, y, width, height);
+}
+
 void
 window_damage(struct window *window, int32_t x, int32_t y,
 	      int32_t width, int32_t height)

clients/window.h

@@ -193,6 +193,10 @@ enum window_buffer_type {
 	WINDOW_BUFFER_TYPE_SHM,
 };
 
+void
+display_surface_damage(struct display *display, cairo_surface_t *cairo_surface,
+		       int32_t x, int32_t y, int32_t width, int32_t height);
+
 void
 window_set_buffer_type(struct window *window, enum window_buffer_type type);