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****************************************************************************/

#ifndef QPAINTENGINE_ALPHA_P_H

#define QPAINTENGINE_ALPHA_P_H

//

//  W A R N I N G

//  -------------

//

// This file is not part of the Qt API.  It exists for the convenience

// of other Qt classes.  This header file may change from version to

// version without notice, or even be removed.

//

// We mean it.

//

#ifndef QT_NO_PRINTER

#include "private/qpaintengine_p.h"

QT_BEGIN_NAMESPACE

class QAlphaPaintEnginePrivate;

class QAlphaPaintEngine : public QPaintEngine

{

    Q_DECLARE_PRIVATE(QAlphaPaintEngine)

public:

    ~QAlphaPaintEngine();

    virtual bool begin(QPaintDevice *pdev);

    virtual bool end();

    virtual void updateState(const QPaintEngineState &state);

    virtual void drawPath(const QPainterPath &path);

    virtual void drawPolygon(const QPointF *points, int pointCount, PolygonDrawMode mode);

    virtual void drawPixmap(const QRectF &r, const QPixmap &pm, const QRectF &sr);

    virtual void drawImage(const QRectF &r, const QImage &image, const QRectF &sr);

    virtual void drawTextItem(const QPointF &p, const QTextItem &textItem);

    virtual void drawTiledPixmap(const QRectF &r, const QPixmap &pixmap, const QPointF &s);

protected:

    QAlphaPaintEngine(QAlphaPaintEnginePrivate &data, PaintEngineFeatures devcaps = 0);

    QRegion alphaClipping() const;

    bool continueCall() const;

    void flushAndInit(bool init = true);

    void cleanUp();

};

class QAlphaPaintEnginePrivate : public QPaintEnginePrivate

{

    Q_DECLARE_PUBLIC(QAlphaPaintEngine)

public:

    QAlphaPaintEnginePrivate();

    ~QAlphaPaintEnginePrivate();

    int m_pass;

    QPicture *m_pic;

    QPaintEngine *m_picengine;

    QPainter *m_picpainter;

    QPaintEngine::PaintEngineFeatures m_savedcaps;

    QPaintDevice *m_pdev;

    QRegion m_alphargn;

    QRegion m_cliprgn;

    bool m_hasalpha;

    bool m_alphaPen;

    bool m_alphaBrush;

    bool m_alphaOpacity;

    bool m_advancedPen;

    bool m_advancedBrush;

    bool m_complexTransform;

    bool m_emulateProjectiveTransforms;

    bool m_continueCall;

    QTransform m_transform;

    QPen m_pen;

    void addAlphaRect(const QRectF &rect);

    QRectF addPenWidth(const QPainterPath &path);

    void drawAlphaImage(const QRectF &rect);

    QRect toRect(const QRectF &rect) const;

    bool fullyContained(const QRectF &rect) const;

    void resetState(QPainter *p);

};

QT_END_NAMESPACE

#endif // QT_NO_PRINTER

#endif // QPAINTENGINE_ALPHA_P_H