/****************************************************************************
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** Copyright (C) 2012 Digia Plc 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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** accordance with the commercial license agreement provided with the
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****************************************************************************/

#ifndef QPLATFORMSCREENPAGEFLIPPER_H
#define QPLATFORMSCREENPAGEFLIPPER_H

//
//  W A R N I N G
//  -------------
//
// This file is part of the QPA API and is not meant to be used
// in applications. Usage of this API may make your code
// source and binary incompatible with future versions of Qt.
//

#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;

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

QT_END_NAMESPACE

QT_END_HEADER

#endif // QPLATFORMSCREENPAGEFLIPPER_H
