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diff --git a/src/gui/opengl/qopenglpaintdevice_p.h b/src/gui/opengl/qopenglpaintdevice_p.h
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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.
+**
+** $QT_BEGIN_LICENSE:LGPL21$
+** 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 or version 3 as published by the Free
+** Software Foundation and appearing in the file LICENSE.LGPLv21 and
+** LICENSE.LGPLv3 included in the packaging of this file. Please review the
+** following information to ensure the GNU Lesser General Public License
+** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
+** 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.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QOPENGL_PAINTDEVICE_P_H
+#define QOPENGL_PAINTDEVICE_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists for the convenience
+// of the Qt OpenGL classes.  This header file may change from
+// version to version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <qopenglpaintdevice.h>
+
+QT_BEGIN_NAMESPACE
+
+class QOpenGLContext;
+class QPaintEngine;
+
+class Q_GUI_EXPORT QOpenGLPaintDevicePrivate
+{
+public:
+    QOpenGLPaintDevicePrivate(const QSize &size);
+    virtual ~QOpenGLPaintDevicePrivate() { }
+
+    static QOpenGLPaintDevicePrivate *get(QOpenGLPaintDevice *dev) { return dev->d_func(); }
+
+    virtual void beginPaint() { }
+    virtual void endPaint() { }
+
+public:
+    QSize size;
+    QOpenGLContext *ctx;
+
+    qreal dpmx;
+    qreal dpmy;
+    qreal devicePixelRatio;
+
+    bool flipped;
+
+    QPaintEngine *engine;
+};
+
+QT_END_NAMESPACE
+
+#endif // QOPENGL_PAINTDEVICE_P_H