Recreate the FBO on dpr change in rendercontrol example

Even when the window size is not changing. This provides a useful
example of connecting to the screenChanged() signal.

Task-number: QTBUG-45613
Change-Id: I0652838d9c0cfec8b64b3422997159f385445b20
Reviewed-by: Gunnar Sletta <gunnar@sletta.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/examples/quick/rendercontrol/window_singlethreaded.h b/examples/quick/rendercontrol/window_singlethreaded.h
index 5344199c18..534d6b9bc3 100644
--- a/examples/quick/rendercontrol/window_singlethreaded.h
+++ b/examples/quick/rendercontrol/window_singlethreaded.h
@@ -77,10 +77,12 @@ private slots:
     void destroyFbo();
     void render();
     void requestUpdate();
+    void handleScreenChange();
 
 private:
     void startQuick(const QString &filename);
     void updateSizes();
+    void resizeFbo();
 
     QOpenGLContext *m_context;
     QOffscreenSurface *m_offscreenSurface;
@@ -94,6 +96,7 @@ private:
     bool m_quickReady;
     QTimer m_updateTimer;
     CubeRenderer *m_cubeRenderer;
+    qreal m_dpr;
 };
 
 #endif