1 files changed, 4 insertions, 1 deletions
diff --git a/src/plugins/platforms/cocoa/qcocoabackingstore.h b/src/plugins/platforms/cocoa/qcocoabackingstore.h
index ebbf9d1609..71b6015a54 100644
--- a/src/plugins/platforms/cocoa/qcocoabackingstore.h
+++ b/src/plugins/platforms/cocoa/qcocoabackingstore.h
@@ -40,6 +40,7 @@ public:
     void flush(QWindow *, const QRegion &, const QPoint &) override;
 
     FlushResult rhiFlush(QWindow *window,
+                         qreal sourceDevicePixelRatio,
                          const QRegion &region,
                          const QPoint &offset,
                          QPlatformTextureList *textures,
@@ -53,6 +54,7 @@ private:
     bool eventFilter(QObject *watched, QEvent *event) override;
 
     QSize m_requestedSize;
+    QRegion m_staticContents;
 
     class GraphicsBuffer : public QIOSurfaceGraphicsBuffer
     {
@@ -77,7 +79,8 @@ private:
     bool recreateBackBufferIfNeeded();
     void finalizeBackBuffer();
 
-    void preserveFromFrontBuffer(const QRegion &region, const QPoint &offset = QPoint());
+    void blitBuffer(GraphicsBuffer *sourceBuffer, const QRegion &sourceRegion,
+                    GraphicsBuffer *destinationBuffer, const QPoint &destinationOffset = QPoint());
 
     void backingPropertiesChanged();
     QMacNotificationObserver m_backingPropertiesObserver;