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diff --git a/src/opengl/qopenglwidget.h b/src/opengl/qopenglwidget.h
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+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtOpenGL 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 The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/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 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QOPENGLWIDGET_H
+#define QOPENGLWIDGET_H
+
+#include <QtOpenGL/qtopenglglobal.h>
+
+#ifndef QT_NO_OPENGL
+
+#include <QtWidgets/QWidget>
+#include <QtGui/QSurfaceFormat>
+#include <QtGui/qopengl.h>
+
+QT_BEGIN_NAMESPACE
+
+class QOpenGLWidgetPrivate;
+
+class Q_OPENGL_EXPORT QOpenGLWidget : public QWidget
+{
+    Q_OBJECT
+    Q_DECLARE_PRIVATE(QOpenGLWidget)
+
+public:
+    enum UpdateBehavior {
+        NoPartialUpdate,
+        PartialUpdate
+    };
+
+    explicit QOpenGLWidget(QWidget* parent = nullptr, Qt::WindowFlags f = Qt::WindowFlags());
+    ~QOpenGLWidget();
+
+    void setUpdateBehavior(UpdateBehavior updateBehavior);
+    UpdateBehavior updateBehavior() const;
+
+    void setFormat(const QSurfaceFormat &format);
+    QSurfaceFormat format() const;
+
+    GLenum textureFormat() const;
+    void setTextureFormat(GLenum texFormat);
+
+    bool isValid() const;
+
+    void makeCurrent();
+    void doneCurrent();
+
+    QOpenGLContext *context() const;
+    GLuint defaultFramebufferObject() const;
+
+    QImage grabFramebuffer();
+
+Q_SIGNALS:
+    void aboutToCompose();
+    void frameSwapped();
+    void aboutToResize();
+    void resized();
+
+protected:
+    virtual void initializeGL();
+    virtual void resizeGL(int w, int h);
+    virtual void paintGL();
+
+    void paintEvent(QPaintEvent *e) override;
+    void resizeEvent(QResizeEvent *e) override;
+    bool event(QEvent *e) override;
+
+    int metric(QPaintDevice::PaintDeviceMetric metric) const override;
+    QPaintDevice *redirected(QPoint *p) const override;
+    QPaintEngine *paintEngine() const override;
+
+private:
+    Q_DISABLE_COPY(QOpenGLWidget)
+};
+
+QT_END_NAMESPACE
+
+#endif // QT_NO_OPENGL
+
+#endif // QOPENGLWIDGET_H