macOS: Modernize QCocoaBackingStore::flush()

Instead of forwarding the flush to the view, using CoreGraphics to blit
the backing store to the window, we do everything in flush(), and use
higher level AppKit APIs to do the blit.

This simplifies the flow and code quite a bit, and also supports blitting
of individual regions in a flush instead of the whole bounding rect.

Change-Id: I2173c1a7763fe652a94125c7e3ae93a655412cd3
Reviewed-by: Jake Petroules <jake.petroules@qt.io>
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>

1 files changed, 1 insertions, 0 deletions

diff --git a/src/plugins/platforms/cocoa/qcocoabackingstore.h b/src/plugins/platforms/cocoa/qcocoabackingstore.h
index 5ed455fd71..bf6766beaa 100644
--- a/src/plugins/platforms/cocoa/qcocoabackingstore.h
+++ b/src/plugins/platforms/cocoa/qcocoabackingstore.h
@@ -53,6 +53,7 @@ public:
     void flush(QWindow *, const QRegion &, const QPoint &) Q_DECL_OVERRIDE;
 
 private:
+    bool windowHasUnifiedToolbar() const;
     QImage::Format format() const Q_DECL_OVERRIDE;
 };