+static bool
+x11_surface_is_local_to_gpu(struct wsi_device *wsi_dev,
+ xcb_connection_t *conn)
+{
+ struct wsi_x11_connection *wsi_conn =
+ wsi_x11_get_connection(wsi_dev, conn);
+
+ if (!wsi_conn)
+ return false;
+
+ if (!wsi_x11_check_for_dri3(wsi_conn))
+ return false;
+
+ if (!wsi_x11_check_dri3_compatible(wsi_dev, conn))
+ return false;
+
+ return true;
+}
+
+static VkResult
+x11_surface_get_present_rectangles(VkIcdSurfaceBase *icd_surface,
+ struct wsi_device *wsi_device,
+ uint32_t* pRectCount,
+ VkRect2D* pRects)
+{
+ xcb_connection_t *conn = x11_surface_get_connection(icd_surface);
+ xcb_window_t window = x11_surface_get_window(icd_surface);
+ VK_OUTARRAY_MAKE(out, pRects, pRectCount);
+
+ if (x11_surface_is_local_to_gpu(wsi_device, conn)) {
+ vk_outarray_append(&out, rect) {
+ xcb_generic_error_t *err = NULL;
+ xcb_get_geometry_cookie_t geom_cookie = xcb_get_geometry(conn, window);
+ xcb_get_geometry_reply_t *geom =
+ xcb_get_geometry_reply(conn, geom_cookie, &err);
+ free(err);
+ if (geom) {
+ *rect = (VkRect2D) {
+ .offset = { 0, 0 },
+ .extent = { geom->width, geom->height },
+ };
+ } else {
+ /* This can happen if the client didn't wait for the configure event
+ * to come back from the compositor. In that case, we don't know the
+ * size of the window so we just return valid "I don't know" stuff.
+ */
+ *rect = (VkRect2D) {
+ .offset = { 0, 0 },
+ .extent = { -1, -1 },
+ };
+ }
+ free(geom);
+ }
+ }
+
+ return vk_outarray_status(&out);
+}
+