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diff --git a/src/datavisualization/data/qcustom3dvolume_p.h b/src/datavisualization/data/qcustom3dvolume_p.h
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+/****************************************************************************
+**
+** Copyright (C) 2014 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 QCUSTOM3DVOLUME_P_H
+#define QCUSTOM3DVOLUME_P_H
+
+#include "qcustom3dvolume.h"
+#include "qcustom3ditem_p.h"
+
+QT_BEGIN_NAMESPACE_DATAVISUALIZATION
+
+struct QCustomVolumeDirtyBitField {
+    bool textureDimensionsDirty : 1;
+    bool sliceIndicesDirty      : 1;
+    bool colorTableDirty        : 1;
+    bool textureDataDirty       : 1;
+    bool textureFormatDirty     : 1;
+
+    QCustomVolumeDirtyBitField()
+        : textureDimensionsDirty(false),
+          sliceIndicesDirty(false),
+          colorTableDirty(false),
+          textureDataDirty(false),
+          textureFormatDirty(false)
+    {
+    }
+};
+
+class QCustom3DVolumePrivate : public QCustom3DItemPrivate
+{
+    Q_OBJECT
+
+public:
+    QCustom3DVolumePrivate(QCustom3DVolume *q);
+    QCustom3DVolumePrivate(QCustom3DVolume *q, const QVector3D &position, const QVector3D &scaling,
+                           const QQuaternion &rotation, int textureWidth,
+                           int textureHeight, int textureDepth, QVector<uchar> *textureData,
+                           QImage::Format textureFormat, const QVector<QRgb> &colorTable);
+    virtual ~QCustom3DVolumePrivate();
+
+    void resetDirtyBits();
+
+    QCustom3DVolume *qptr();
+
+public:
+    int m_textureWidth;
+    int m_textureHeight;
+    int m_textureDepth;
+    int m_sliceIndexX;
+    int m_sliceIndexY;
+    int m_sliceIndexZ;
+
+    QImage::Format m_textureFormat;
+    QVector<QRgb> m_colorTable;
+    QVector<uchar> *m_textureData;
+
+    QCustomVolumeDirtyBitField m_dirtyBitsVolume;
+
+private:
+    friend class QCustom3DVolume;
+};
+
+QT_END_NAMESPACE_DATAVISUALIZATION
+
+#endif