/****************************************************************************
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** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
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** This file is part of the QtGui module of the Qt Toolkit.
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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** 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
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** $QT_END_LICENSE$
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****************************************************************************/

#ifndef QPLATFORMSCREENPAGEFLIPPER_QPA_H
#define QPLATFORMSCREENPAGEFLIPPER_QPA_H

#include <QtCore/QObject>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

class Q_GUI_EXPORT QPlatformScreenBuffer {
public:
    QPlatformScreenBuffer();
    virtual ~QPlatformScreenBuffer();

    bool isDestroyed() const;
    bool isReady() const;

    virtual void aboutToBeDisplayed();
    virtual void displayed();
    virtual void release() = 0;

    virtual void *handle() const = 0;

protected:
    bool m_destroyed;
    bool m_ready;
};

class Q_GUI_EXPORT QPlatformScreenPageFlipper : public QObject
{
    Q_OBJECT
public:
    explicit QPlatformScreenPageFlipper(QObject *parent = 0);

    virtual bool displayBuffer(QPlatformScreenBuffer *) = 0;

signals:
    void bufferDisplayed(QPlatformScreenBuffer *);
    void bufferReleased(QPlatformScreenBuffer *);
};

QT_END_NAMESPACE

QT_END_HEADER

#endif // QPLATFORMSCREENPAGEFLIPPER_QPA_H