/****************************************************************************
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** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
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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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** Alternatively, this file may be used under the terms of the GNU
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****************************************************************************/

#ifndef QDIRECTPAINTER_QWS_H
#define QDIRECTPAINTER_QWS_H

#include <QtCore/qobject.h>
#include <QtGui/qregion.h>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(Gui)

#ifndef QT_NO_DIRECTPAINTER
class QDirectPainterPrivate;
struct QWSEmbedEvent;

class Q_GUI_EXPORT QDirectPainter : public QObject {
    Q_OBJECT
    Q_DECLARE_PRIVATE(QDirectPainter)
public:

    enum SurfaceFlag { NonReserved = 0,
                       Reserved = 1,
                       ReservedSynchronous = 3 };

    explicit QDirectPainter(QObject *parentObject = 0, SurfaceFlag flag = NonReserved);
    ~QDirectPainter();

    void setRegion(const QRegion&);
    QRegion requestedRegion() const;
    QRegion allocatedRegion() const;

    void setGeometry(const QRect&);
    QRect geometry() const;

    WId winId() const;
    virtual void regionChanged(const QRegion &exposedRegion);

    void startPainting(bool lockDisplay = true);
    void endPainting();
    void endPainting(const QRegion &region);
    void flush(const QRegion &region);

    void raise();
    void lower();


    static QRegion reserveRegion(const QRegion&);
    static QRegion reservedRegion();
    static QRegion region() { return reservedRegion(); }

    static uchar* frameBuffer();
    static int screenDepth();
    static int screenWidth();
    static int screenHeight();
    static int linestep();

    static void lock();
    static void unlock();
private:
    friend  void qt_directpainter_region(QDirectPainter *dp, const QRegion &alloc, int type);
    friend void qt_directpainter_embedevent(QDirectPainter*, const QWSEmbedEvent*);
};

#endif

QT_END_NAMESPACE

QT_END_HEADER

#endif // QDIRECTPAINTER_QWS_H
