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+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QML Shaders plugin 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 SHADEREFFECT_H
+#define SHADEREFFECT_H
+
+#include <QGraphicsEffect>
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+class ShaderEffectSource;
+
+class ShaderEffect : public QGraphicsEffect
+{
+    Q_OBJECT
+
+public:
+    ShaderEffect(QObject *parent = 0);
+    ~ShaderEffect();
+    void addRenderTarget(ShaderEffectSource *target);
+    void removeRenderTarget(ShaderEffectSource *target);
+
+protected:
+    virtual void draw (QPainter *painter);
+    virtual void sourceChanged (ChangeFlags flags);
+
+private:
+    void prepareBufferedDraw(QPainter *painter);
+    void updateRenderTargets();
+    bool hideOriginal() const;
+
+public:
+    QVector<ShaderEffectSource*> m_renderTargets;
+    bool m_changed : 1;
+};
+
+QT_END_HEADER
+
+QT_END_NAMESPACE
+
+#endif // SHADEREFFECT_H