Use PlatformNativeInterface to obtain backingStore's dc

Change-Id: I6ec2fc0b8e7696fdfe4468920228df2d21c933fd
Reviewed-on: http://codereview.qt.nokia.com/1501
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@nokia.com>

4 files changed, 17 insertions, 0 deletions

diff --git a/src/gui/kernel/qplatformnativeinterface_qpa.cpp b/src/gui/kernel/qplatformnativeinterface_qpa.cpp
index 82d6a97a47..18bef8a595 100644
--- a/src/gui/kernel/qplatformnativeinterface_qpa.cpp
+++ b/src/gui/kernel/qplatformnativeinterface_qpa.cpp
@@ -57,4 +57,11 @@ void *QPlatformNativeInterface::nativeResourceForContext(const QByteArray &resou
     return 0;
 }
 
+void * QPlatformNativeInterface::nativeResourceForBackingStore(const QByteArray &resource, QBackingStore *backingStore)
+{
+    Q_UNUSED(resource);
+    Q_UNUSED(backingStore);
+    return 0;
+}
+
 QT_END_NAMESPACE
diff --git a/src/gui/kernel/qplatformnativeinterface_qpa.h b/src/gui/kernel/qplatformnativeinterface_qpa.h
index edc1a9d96e..136191e2aa 100644
--- a/src/gui/kernel/qplatformnativeinterface_qpa.h
+++ b/src/gui/kernel/qplatformnativeinterface_qpa.h
@@ -52,12 +52,14 @@ QT_MODULE(Gui)
 
 class QGuiGLContext;
 class QWindow;
+class QBackingStore;
 
 class Q_GUI_EXPORT QPlatformNativeInterface
 {
 public:
     virtual void *nativeResourceForContext(const QByteArray &resource, QGuiGLContext *context);
     virtual void *nativeResourceForWindow(const QByteArray &resource, QWindow *window);
+    virtual void *nativeResourceForBackingStore(const QByteArray &resource, QBackingStore *backingStore);
 };
 
 QT_END_NAMESPACE
diff --git a/src/gui/painting/qbackingstore.cpp b/src/gui/painting/qbackingstore.cpp
index 776e33a1a8..68dbb7d109 100644
--- a/src/gui/painting/qbackingstore.cpp
+++ b/src/gui/painting/qbackingstore.cpp
@@ -247,4 +247,9 @@ void Q_GUI_EXPORT qt_scrollRectInImage(QImage &img, const QRect &rect, const QPo
     }
 }
 
+QPlatformBackingStore *QBackingStore::handle() const
+{
+    return d_ptr->platformBackingStore;
+}
+
 QT_END_NAMESPACE
diff --git a/src/gui/painting/qbackingstore.h b/src/gui/painting/qbackingstore.h
index 3ab0264b17..9f646f89ac 100644
--- a/src/gui/painting/qbackingstore.h
+++ b/src/gui/painting/qbackingstore.h
@@ -54,6 +54,7 @@ class QRect;
 class QPoint;
 class QImage;
 class QBackingStorePrivate;
+class QPlatformBackingStore;
 
 class Q_GUI_EXPORT QBackingStore
 {
@@ -81,6 +82,8 @@ public:
     QRegion staticContents() const;
     bool hasStaticContents() const;
 
+    QPlatformBackingStore *handle() const;
+
 private:
     QScopedPointer<QBackingStorePrivate> d_ptr;
 };