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diff --git a/src/datavisualization/utils/surfaceobject_p.h b/src/datavisualization/utils/surfaceobject_p.h
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+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc
+** All rights reserved.
+** For any questions to Digia, please use contact form at http://qt.digia.com
+**
+** This file is part of the QtDataVisualization module.
+**
+** Licensees holding valid Qt Enterprise licenses may use this file in
+** accordance with the Qt Enterprise License Agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.
+**
+** If you have questions regarding the use of this file, please use
+** contact form at http://qt.digia.com
+**
+****************************************************************************/
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the QtDataVisualization API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+
+#ifndef SURFACEOBJECT_P_H
+#define SURFACEOBJECT_P_H
+
+#include "datavisualizationglobal_p.h"
+#include "abstractobjecthelper_p.h"
+#include "qsurfacedataproxy.h"
+
+#include <QOpenGLFunctions>
+#include <QRect>
+
+QT_DATAVISUALIZATION_BEGIN_NAMESPACE
+
+class SurfaceObject : public AbstractObjectHelper
+{
+public:
+    SurfaceObject();
+    ~SurfaceObject();
+
+    void setUpData(const QSurfaceDataArray &dataArray, QRect space, GLfloat yRange, bool changeGeometry);
+    void setUpSmoothData(const QSurfaceDataArray &dataArray, QRect space, GLfloat yRange, bool changeGeometry);
+    GLuint gridElementBuf();
+    GLuint gridIndexCount();
+
+private:
+    QVector3D normal(const QVector3D &a, const QVector3D &b, const QVector3D &c);
+    void createBuffers(const QVector<QVector3D> &vertices, const QVector<QVector2D> &uvs,
+                       const QVector<QVector3D> &normals, const GLint *indices,
+                       const GLint *gridIndices, bool changeGeometry);
+
+private:
+    int m_dataWidth;
+    int m_dataDepth;
+    GLfloat m_yRange;
+    GLuint m_gridElementbuffer;
+    GLuint m_gridIndexCount;
+};
+
+QT_DATAVISUALIZATION_END_NAMESPACE
+#endif // SURFACEOBJECT_P_H