compositor: Scanout client buffers even if they're not map_fullscreen

compositor/compositor-drm.c

@@ -144,7 +144,9 @@ drm_output_prepare_scanout_surface(struct wlsc_output *output_base,
 	int ret;
 	uint32_t fb_id = 0;
 
-	if (es->width != output->base.width ||
+	if (es->x != output->base.x ||
+	    es->y != output->base.y ||
+	    es->width != output->base.width ||
 	    es->height != output->base.height ||
 	    es->image == EGL_NO_IMAGE_KHR)
 		return -1;

compositor/compositor.c

@@ -703,9 +703,8 @@ wlsc_output_repaint(struct wlsc_output *output)
 		using_hardware_cursor = 0;
 
 	es = container_of(ec->surface_list.next, struct wlsc_surface, link);
-	if (es->fullscreen_output == output) {
-		if (es->visual == &ec->compositor.rgb_visual &&
-		    using_hardware_cursor) {
+
+	if (es->visual == &ec->compositor.rgb_visual && using_hardware_cursor) {
 		if (output->prepare_scanout_surface(output, es) == 0) {
 			/* We're drawing nothing now,
 			 * draw the damaged regions later. */
@@ -716,6 +715,7 @@ wlsc_output_repaint(struct wlsc_output *output)
 		}
 	}
 
+	if (es->fullscreen_output == output) {
 		if (es->width < output->width ||
 		    es->height < output->height)
 			glClear(GL_COLOR_BUFFER_BIT);