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diff --git a/examples/opengl/computegles31/glwindow.h b/examples/opengl/computegles31/glwindow.h
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+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef GLWIDGET_H
+#define GLWIDGET_H
+
+#include <QOpenGLWindow>
+#include <QOpenGLTexture>
+#include <QMatrix4x4>
+#include <QVector3D>
+#include <QKeyEvent>
+#include <QPropertyAnimation>
+#include <QSequentialAnimationGroup>
+#include <QRectF>
+
+QT_BEGIN_NAMESPACE
+
+class QOpenGLTexture;
+class QOpenGLShaderProgram;
+class QOpenGLBuffer;
+class QOpenGLVertexArrayObject;
+
+QT_END_NAMESPACE
+
+class GLWindow : public QOpenGLWindow
+{
+    Q_OBJECT
+    Q_PROPERTY(float blurRadius READ blurRadius WRITE setBlurRadius)
+
+public:
+    GLWindow();
+    ~GLWindow();
+
+    void initializeGL() override;
+    void resizeGL(int w, int h) override;
+    void paintGL() override;
+
+    float blurRadius() const { return m_blurRadius; }
+    void setBlurRadius(float blurRadius);
+
+protected:
+    void keyPressEvent(QKeyEvent *e) Q_DECL_OVERRIDE;
+    void setAnimating(bool animate);
+
+private:
+    QPropertyAnimation *m_animationForward;
+    QPropertyAnimation *m_animationBackward;
+    QSequentialAnimationGroup *m_animationGroup;
+    QOpenGLTexture *m_texImageInput;
+    QOpenGLTexture *m_texImageTmp;
+    QOpenGLTexture *m_texImageProcessed;
+    QOpenGLShaderProgram *m_shaderDisplay;
+    QOpenGLShaderProgram *m_shaderComputeV;
+    QOpenGLShaderProgram *m_shaderComputeH;
+    QMatrix4x4 m_proj;
+    QSizeF     m_quadSize;
+
+    int m_blurRadius;
+    bool m_animate;
+};
+
+#endif