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diff --git a/src/opengl/qglwindowsurface_qws.cpp b/src/opengl/qglwindowsurface_qws.cpp
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+++ b/src/opengl/qglwindowsurface_qws.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtOpenGL 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 Technology Preview License Agreement accompanying
+** this package.
+**
+** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui/QPaintDevice>
+#include <QtGui/QWidget>
+#include <QtOpenGL/QGLWidget>
+#include "private/qglwindowsurface_qws_p.h"
+#include "private/qpaintengine_opengl_p.h"
+
+QT_BEGIN_NAMESPACE
+
+/*!
+    \class QWSGLWindowSurface
+    \since 4.3
+    \ingroup qws
+    \preliminary
+
+    \brief The QWSGLWindowSurface class provides the drawing area for top-level
+    windows with Qt for Embedded Linux on EGL/OpenGL ES. It also provides the
+    drawing area for \l{QGLWidget}s whether they are top-level windows or
+    children of another QWidget.
+
+    Note that this class is only available in Qt for Embedded Linux and only
+    available if Qt is configured with OpenGL support.
+*/
+
+class QWSGLWindowSurfacePrivate
+{
+public:
+    QWSGLWindowSurfacePrivate() :
+        qglContext(0), ownsContext(false) {}
+
+    QGLContext *qglContext;
+    bool ownsContext;
+};
+
+/*!
+    Constructs an empty QWSGLWindowSurface for the given top-level \a window.
+    The window surface is later initialized from chooseContext() and resources for it
+    is typically allocated in setGeometry().
+*/
+QWSGLWindowSurface::QWSGLWindowSurface(QWidget *window)
+    : QWSWindowSurface(window),
+      d_ptr(new QWSGLWindowSurfacePrivate)
+{
+}
+
+/*!
+    Constructs an empty QWSGLWindowSurface.
+*/
+QWSGLWindowSurface::QWSGLWindowSurface()
+    : d_ptr(new QWSGLWindowSurfacePrivate)
+{
+}
+
+/*!
+    Destroys the QWSGLWindowSurface object and frees any
+    allocated resources.
+ */
+QWSGLWindowSurface::~QWSGLWindowSurface()
+{
+    Q_D(QWSGLWindowSurface);
+    if (d->ownsContext)
+        delete d->qglContext;
+    delete d;
+}
+
+/*!
+    Returns the QGLContext of the window surface.
+*/
+QGLContext *QWSGLWindowSurface::context() const
+{
+    Q_D(const QWSGLWindowSurface);
+    if (!d->qglContext) {
+        QWSGLWindowSurface *that = const_cast<QWSGLWindowSurface*>(this);
+        that->setContext(new QGLContext(QGLFormat::defaultFormat()));
+        that->d_func()->ownsContext = true;
+    }
+    return d->qglContext;
+}
+
+/*!
+    Sets the QGLContext for this window surface to \a context.
+*/
+void QWSGLWindowSurface::setContext(QGLContext *context)
+{
+    Q_D(QWSGLWindowSurface);
+    if (d->ownsContext) {
+        delete d->qglContext;
+        d->ownsContext = false;
+    }
+    d->qglContext = context;
+}
+
+QT_END_NAMESPACE