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diff --git a/src/declarative/scenegraph/coreapi/qsgnodeupdater_p.h b/src/declarative/scenegraph/coreapi/qsgnodeupdater_p.h
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+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtDeclarative module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** 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, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef NODEUPDATER_P_H
+#define NODEUPDATER_P_H
+
+#include "qsgnode.h"
+#include "qsgmatrix4x4stack.h"
+#include <qstack.h>
+
+QT_BEGIN_NAMESPACE
+
+class Q_DECLARATIVE_EXPORT QSGNodeUpdater : public QSGNodeVisitor
+{
+public:
+    QSGNodeUpdater();
+
+    virtual void updateStates(QSGNode *n);
+    virtual bool isNodeBlocked(QSGNode *n, QSGNode *root) const;
+
+    void setToplevelOpacity(qreal alpha) { m_opacity_stack.top() = alpha; }
+    qreal toplevelOpacity() const { return m_opacity_stack.top(); }
+
+protected:
+    void enterTransformNode(QSGTransformNode *);
+    void leaveTransformNode(QSGTransformNode *);
+    void enterClipNode(QSGClipNode *c);
+    void leaveClipNode(QSGClipNode *c);
+    void enterOpacityNode(QSGOpacityNode *o);
+    void leaveOpacityNode(QSGOpacityNode *o);
+    void enterGeometryNode(QSGGeometryNode *);
+
+    void visitNode(QSGNode *n);
+    void visitChildren(QSGNode *n);
+
+
+    QSGMatrix4x4Stack m_matrix_stack;
+    QStack<const QMatrix4x4 *> m_combined_matrix_stack;
+    QStack<qreal> m_opacity_stack;
+    const QSGClipNode *m_current_clip;
+
+    int m_force_update;
+
+    qreal m_toplevel_alpha;
+};
+
+QT_END_NAMESPACE
+
+#endif // NODEUPDATER_P_H