1 files changed, 8 insertions, 1 deletions
diff --git a/src/client/qwaylandwindow_p.h b/src/client/qwaylandwindow_p.h
index 56ebd3cc6..e5838d231 100644
--- a/src/client/qwaylandwindow_p.h
+++ b/src/client/qwaylandwindow_p.h
@@ -191,7 +191,10 @@ public:
 
     bool startSystemMove(const QPoint &pos) override;
 
+    void timerEvent(QTimerEvent *event) override;
     void requestUpdate() override;
+    void handleUpdate();
+    void deliverUpdateRequest() override;
 
 public slots:
     void applyConfigure();
@@ -211,10 +214,14 @@ protected:
     Qt::MouseButtons mMousePressedInContentArea = Qt::NoButton;
 
     WId mWindowId;
-    bool mWaitingForFrameSync = false;
+    bool mWaitingForFrameCallback = false;
     struct ::wl_callback *mFrameCallback = nullptr;
     QWaitCondition mFrameSyncWait;
 
+    // True when we have called deliverRequestUpdate, but the client has not yet attached a new buffer
+    bool mWaitingForUpdate = false;
+    int mFallbackUpdateTimerId = -1;
+
     QMutex mResizeLock;
     bool mWaitingToApplyConfigure = false;
     bool mCanResize = true;