Avoid flicker

Don't start a new paint until we get an ack from the compositor

Reviewed-by: Samuel

1 files changed, 4 insertions, 0 deletions

diff --git a/src/plugins/platforms/wayland/qwaylandshmsurface.h b/src/plugins/platforms/wayland/qwaylandshmsurface.h
index 266b290..615d944 100644
--- a/src/plugins/platforms/wayland/qwaylandshmsurface.h
+++ b/src/plugins/platforms/wayland/qwaylandshmsurface.h
@@ -71,10 +71,14 @@ public:
     QPaintDevice *paintDevice();
     void flush(QWidget *widget, const QRegion &region, const QPoint &offset);
     void resize(const QSize &size);
+    void beginPaint(const QRegion &);
 
 private:
+    static void frameCallback(void *data, uint32_t time);\
+
     QWaylandShmBuffer *mBuffer;
     QWaylandDisplay *mDisplay;
+    bool mWaitingForFrameSync;
 };
 
 QT_END_NAMESPACE