Renderer/QRenderTargetSurfaceSelector: implement proper synchronization

This is needed to avoid rendering on a surface that has been destroyed.

Change-Id: Iadc2a32e2e0113704ca4df48df6bcdd1a0d8256c
Reviewed-by: Paul Lemire <paul.lemire@kdab.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/src/render/framegraph/rendersurfaceselector_p.h b/src/render/framegraph/rendersurfaceselector_p.h
index 114a52a31..8c84695a8 100644
--- a/src/render/framegraph/rendersurfaceselector_p.h
+++ b/src/render/framegraph/rendersurfaceselector_p.h
@@ -72,10 +72,16 @@ public:
     void sceneChangeEvent(const Qt3DCore::QSceneChangePtr &e) Q_DECL_OVERRIDE;
 
     QSurface *surface() const { return m_surface; }
+    inline int width() const Q_DECL_NOEXCEPT { return m_width; }
+    inline int height() const Q_DECL_NOEXCEPT { return m_height; }
+    inline float devicePixelRatio() const Q_DECL_NOEXCEPT { return m_devicePixelRatio; }
 
 private:
     QSurface *m_surface;
     QSize m_renderTargetSize;
+    int m_width;
+    int m_height;
+    float m_devicePixelRatio;
 };
 
 } // namespace Render