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+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the QtDataVis3D module.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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 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 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, 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.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt 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 TEXTUREHELPER_P_H
+#define TEXTUREHELPER_P_H
+
+#include "qdatavis3dglobal.h"
+#include <QOpenGLFunctions>
+#include <QRgb>
+
+QTCOMMERCIALDATAVIS3D_BEGIN_NAMESPACE
+
+class TextureHelper : protected QOpenGLFunctions
+{
+    public:
+    TextureHelper();
+    ~TextureHelper();
+
+    // Ownership of created texture is transferred to caller
+    GLuint create2DTexture(const QImage &image, bool useTrilinearFiltering = false,
+                           bool convert = true);
+    GLuint createCubeMapTexture(const QImage &image, bool useTrilinearFiltering = false);
+    // Returns selection framebuffer and inserts generated texture id to texture parameters
+    GLuint createSelectionBuffer(const QSize &size, GLuint &texture, GLuint &depthTexture);
+    // Returns selection texture and inserts generated framebuffers to framebuffer parameters
+    GLuint createSelectionTexture(const QSize &size, GLuint &frameBuffer, GLuint &depthBuffer);
+    // Returns depth texture and inserts generated framebuffer to parameter
+    GLuint createDepthTexture(const QSize &size, GLuint &frameBuffer);
+    void deleteTexture(const GLuint *texture);
+
+    private:
+    QImage convertToGLFormat(const QImage &srcImage);
+    void convertToGLFormatHelper(QImage &dstImage, const QImage &srcImage, GLenum texture_format);
+    QRgb qt_gl_convertToGLFormatHelper(QRgb src_pixel, GLenum texture_format);
+
+    friend class Q3DBarsPrivate;
+    friend class Q3DMapsPrivate;
+};
+
+QTCOMMERCIALDATAVIS3D_END_NAMESPACE
+
+#endif