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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
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