struct wlr_scene_rect *fullscreen_bg; /* See setfullscreen() for info */

		/* The xdg-protocol specifies:
		 *
		 * If the fullscreened surface is not opaque, the compositor must make
		 * sure that other screen content not part of the same surface tree (made
		 * up of subsurfaces, popups or similarly coupled surfaces) are not
		 * visible below the fullscreened surface.
		 *
		 * For brevity we set a black background for all clients
		 */
		c->fullscreen_bg = wlr_scene_rect_create(c->scene,
			c->geom.width, c->geom.height, fullscreen_bg);
		wlr_scene_node_lower_to_bottom(&c->fullscreen_bg->node);

		wlr_scene_node_destroy(&c->fullscreen_bg->node);

/* To conform the xdg-protocol, set the alpha to zero to restore the old behavior */
static const float fullscreen_bg[]  = {0.1, 0.1, 0.1, 1.0};