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diff --git a/src/gui/kernel/qrasterwindow.cpp b/src/gui/kernel/qrasterwindow.cpp
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+/****************************************************************************
+ **
+ ** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
+ ** Contact: http://www.qt-project.org/legal
+ **
+ ** This file is part of the QtGui module of the Qt Toolkit.
+ **
+ ** $QT_BEGIN_LICENSE:LGPL$
+ ** Commercial License Usage
+ ** Licensees holding valid commercial Qt licenses may use this file in
+ ** accordance with the commercial license agreement provided with the
+ ** Software or, alternatively, in accordance with the terms contained in
+ ** a written agreement between you and Digia.  For licensing terms and
+ ** conditions see http://qt.digia.com/licensing.  For further information
+ ** use the contact form at http://qt.digia.com/contact-us.
+ **
+ ** GNU Lesser General Public License Usage
+ ** Alternatively, this file may be used under the terms of the GNU Lesser
+ ** General Public License version 2.1 as published by the Free Software
+ ** Foundation and appearing in the file LICENSE.LGPL included in the
+ ** packaging of this file.  Please review the following information to
+ ** ensure the GNU Lesser General Public License version 2.1 requirements
+ ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+ **
+ ** In addition, as a special exception, Digia gives you certain additional
+ ** rights.  These rights are described in the Digia Qt LGPL Exception
+ ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+ **
+ ** GNU General Public License Usage
+ ** Alternatively, this file may be used under the terms of the GNU
+ ** General Public License version 3.0 as published by the Free Software
+ ** Foundation and appearing in the file LICENSE.GPL included in the
+ ** packaging of this file.  Please review the following information to
+ ** ensure the GNU General Public License version 3.0 requirements will be
+ ** met: http://www.gnu.org/copyleft/gpl.html.
+ **
+ **
+ ** $QT_END_LICENSE$
+ **
+ ****************************************************************************/
+
+#include "qrasterwindow.h"
+
+#include <QtGui/private/qpaintdevicewindow_p.h>
+
+#include <QtGui/QBackingStore>
+#include <QtGui/QPainter>
+
+QT_BEGIN_NAMESPACE
+
+/*!
+  \class QRasterWindow
+  \inmodule QtGui
+  \since 5.4
+  \brief QRasterWindow is a convenience class for using QPainter on a QWindow
+
+  QRasterWindow is a QWindow with a raster-based, non-OpenGL surface. On top of
+  the functionality offered by QWindow, QRasterWindow adds a virtual
+  paintEvent() function and the possibility to open a QPainter on itself. The
+  underlying paint engine will be the raster one, meaning that all drawing will
+  happen on the CPU. For performing accelerated, OpenGL-based drawing, use
+  QOpenGLWindow instead.
+
+  Internally the class is thin wrapper for QWindow and QBackingStore
+  and is very similar to the \l{Raster Window Example}{Raster Window
+  Example} that uses these classes directly.
+
+  \sa QPaintDeviceWindow::paintEvent(), QPaintDeviceWindow::update()
+*/
+
+class QRasterWindowPrivate : public QPaintDeviceWindowPrivate
+{
+    Q_DECLARE_PUBLIC(QRasterWindow)
+public:
+    void beginPaint(const QRegion &region) Q_DECL_OVERRIDE
+    {
+        Q_Q(QRasterWindow);
+        if (backingstore->size() != q->size()) {
+            backingstore->resize(q->size());
+            markWindowAsDirty();
+        }
+        backingstore->beginPaint(region);
+    }
+
+    void endPaint() Q_DECL_OVERRIDE
+    {
+        backingstore->endPaint();
+    }
+
+    void flush(const QRegion &region) Q_DECL_OVERRIDE
+    {
+        Q_Q(QRasterWindow);
+        backingstore->flush(region, q);
+    }
+
+    QScopedPointer<QBackingStore> backingstore;
+};
+
+/*!
+  Constructs a new QRasterWindow with \a parent.
+*/
+QRasterWindow::QRasterWindow(QWindow *parent)
+    : QPaintDeviceWindow(*(new QRasterWindowPrivate), parent)
+{
+    setSurfaceType(QSurface::RasterSurface);
+    d_func()->backingstore.reset(new QBackingStore(this));
+}
+
+/*!
+  \internal
+*/
+int QRasterWindow::metric(PaintDeviceMetric metric) const
+{
+    Q_D(const QRasterWindow);
+
+    switch (metric) {
+    case PdmDepth:
+        return d->backingstore->paintDevice()->depth();
+    case PdmDevicePixelRatio:
+        return d->backingstore->paintDevice()->devicePixelRatio();
+    default:
+        break;
+    }
+    return QPaintDeviceWindow::metric(metric);
+}
+
+/*!
+  \internal
+*/
+QPaintDevice *QRasterWindow::redirected(QPoint *) const
+{
+    Q_D(const QRasterWindow);
+    return d->backingstore->paintDevice();
+}
+
+QT_END_NAMESPACE