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diff --git a/src/gui/image/qiconengine.h b/src/gui/image/qiconengine.h
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the QtGui 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 either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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 1.0, 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.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QICONENGINE_H
+#define QICONENGINE_H
+
+#include <QtCore/qglobal.h>
+#include <QtCore/qlist.h>
+#include <QtGui/qicon.h>
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+QT_MODULE(Gui)
+
+class Q_GUI_EXPORT QIconEngine
+{
+public:
+    virtual ~QIconEngine();
+    virtual void paint(QPainter *painter, const QRect &rect, QIcon::Mode mode, QIcon::State state) = 0;
+    virtual QSize actualSize(const QSize &size, QIcon::Mode mode, QIcon::State state);
+    virtual QPixmap pixmap(const QSize &size, QIcon::Mode mode, QIcon::State state);
+
+    virtual void addPixmap(const QPixmap &pixmap, QIcon::Mode mode, QIcon::State state);
+    virtual void addFile(const QString &fileName, const QSize &size, QIcon::Mode mode, QIcon::State state);
+
+#if 0
+    virtual int frameCount(QIcon::Mode fromMode, QIcon::State fromState, QIcon::Mode toMode, QIcon::State toState);
+    virtual void paintFrame(QPainter *painter, const QRect &rect, int frameNumber, QIcon::Mode fromMode, QIcon::State fromState, QIcon::Mode toMode, QIcon::State toState);
+#endif
+};
+
+// ### Qt 5: move the below into QIconEngine
+class Q_GUI_EXPORT QIconEngineV2 : public QIconEngine
+{
+public:
+    virtual QString key() const;
+    virtual QIconEngineV2 *clone() const;
+    virtual bool read(QDataStream &in);
+    virtual bool write(QDataStream &out) const;
+    virtual void virtual_hook(int id, void *data);
+
+public:
+    enum IconEngineHook { AvailableSizesHook = 1 };
+
+    struct AvailableSizesArgument
+    {
+        QIcon::Mode mode;
+        QIcon::State state;
+        QList<QSize> sizes;
+    };
+
+    // ### Qt 5: make this function const and virtual.
+    QList<QSize> availableSizes(QIcon::Mode mode = QIcon::Normal,
+                                QIcon::State state = QIcon::Off);
+};
+
+QT_END_NAMESPACE
+
+QT_END_HEADER
+
+#endif // QICONENGINE_H