1 files changed, 4 insertions, 2 deletions
diff --git a/src/plugins/platforms/cocoa/qcocoabackingstore.mm b/src/plugins/platforms/cocoa/qcocoabackingstore.mm
index a2f6910688..4881dcef71 100644
--- a/src/plugins/platforms/cocoa/qcocoabackingstore.mm
+++ b/src/plugins/platforms/cocoa/qcocoabackingstore.mm
@@ -73,7 +73,9 @@ QPaintDevice *QCocoaBackingStore::paintDevice()
         }
 #endif
 
-        m_qImage = QImage(m_requestedSize * scaleFactor, QImage::Format_ARGB32_Premultiplied);
+        QImage::Format format = window()->format().hasAlpha()
+                ? QImage::Format_ARGB32_Premultiplied : QImage::Format_RGB32;
+        m_qImage = QImage(m_requestedSize * scaleFactor, format);
         m_qImage.setDevicePixelRatio(scaleFactor);
     }
     return &m_qImage;
@@ -92,7 +94,7 @@ void QCocoaBackingStore::flush(QWindow *win, const QRegion &region, const QPoint
     m_cgImage = 0;
     if (!m_qImage.isNull()) {
         if (QCocoaWindow *cocoaWindow = static_cast<QCocoaWindow *>(win->handle()))
-            [cocoaWindow->m_contentView flushBackingStore:this region:region offset:offset];
+            [cocoaWindow->m_qtView flushBackingStore:this region:region offset:offset];
     }
 }