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diff --git a/src/gui/painting/qwindowsurface_p.h b/src/gui/painting/qwindowsurface_p.h
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the QtGui module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, 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.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QWINDOWSURFACE_P_H
+#define QWINDOWSURFACE_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists for the convenience
+// of other Qt classes.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <QtGui/qwidget.h>
+
+QT_BEGIN_NAMESPACE
+
+class QPaintDevice;
+class QRegion;
+class QRect;
+class QPoint;
+class QImage;
+class QWindowSurfacePrivate;
+
+class Q_GUI_EXPORT QWindowSurface
+{
+public:
+    QWindowSurface(QWidget *window);
+    virtual ~QWindowSurface();
+
+    QWidget *window() const;
+
+    virtual QPaintDevice *paintDevice() = 0;
+    virtual void flush(QWidget *widget, const QRegion &region,
+                       const QPoint &offset) = 0;
+    virtual void setGeometry(const QRect &rect);
+    QRect geometry() const;
+
+    virtual bool scroll(const QRegion &area, int dx, int dy);
+
+    virtual void beginPaint(const QRegion &);
+    virtual void endPaint(const QRegion &);
+
+    virtual QImage* buffer(const QWidget *widget);
+    virtual QPixmap grabWidget(const QWidget *widget, const QRect& rectangle = QRect()) const;
+
+    virtual QPoint offset(const QWidget *widget) const;
+    inline QRect rect(const QWidget *widget) const;
+
+    bool hasStaticContentsSupport() const;
+
+    void setStaticContents(const QRegion &region);
+    QRegion staticContents() const;
+
+protected:
+    bool hasStaticContents() const;
+    void setStaticContentsSupport(bool enable);
+
+private:
+    QWindowSurfacePrivate *d_ptr;
+};
+
+inline QRect QWindowSurface::rect(const QWidget *widget) const
+{
+    return widget->rect().translated(offset(widget));
+}
+
+QT_END_NAMESPACE
+
+#endif // QWINDOWSURFACE_P_H