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#ifndef QGRAPHICSEFFECT_P_H

#define QGRAPHICSEFFECT_P_H

//

//  W A R N I N G

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

//

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

// of qapplication_*.cpp, qwidget*.cpp and qfiledialog.cpp.  This header

// file may change from version to version without notice, or even be removed.

//

// We mean it.

//

#include "qgraphicseffect.h"

#include <QPixmapCache>

#include <private/qobject_p.h>

#include <private/qpixmapfilter_p.h>

#ifndef QT_NO_GRAPHICSEFFECT

QT_BEGIN_NAMESPACE

class QGraphicsEffectSourcePrivate;

class Q_GUI_EXPORT QGraphicsEffectSource : public QObject

{

    Q_OBJECT

public:

    ~QGraphicsEffectSource();

    const QGraphicsItem *graphicsItem() const;

    const QWidget *widget() const;

    const QStyleOption *styleOption() const;

    bool isPixmap() const;

    void draw(QPainter *painter);

    void update();

    QRectF boundingRect(Qt::CoordinateSystem coordinateSystem = Qt::LogicalCoordinates) const;

    QRect deviceRect() const;

    QPixmap pixmap(Qt::CoordinateSystem system = Qt::LogicalCoordinates,

                   QPoint *offset = 0,

                   QGraphicsEffect::PixmapPadMode mode = QGraphicsEffect::PadToEffectiveBoundingRect) const;

protected:

    QGraphicsEffectSource(QGraphicsEffectSourcePrivate &dd, QObject *parent = 0);

private:

    Q_DECLARE_PRIVATE(QGraphicsEffectSource)

    Q_DISABLE_COPY(QGraphicsEffectSource)

    friend class QGraphicsEffect;

    friend class QGraphicsEffectPrivate;

    friend class QGraphicsScenePrivate;

    friend class QGraphicsItem;

    friend class QGraphicsItemPrivate;

    friend class QWidget;

    friend class QWidgetPrivate;

};

class QGraphicsEffectSourcePrivate : public QObjectPrivate

{

    Q_DECLARE_PUBLIC(QGraphicsEffectSource)

public:

    QGraphicsEffectSourcePrivate()

        : QObjectPrivate()

        , m_cachedSystem(Qt::DeviceCoordinates)

        , m_cachedMode(QGraphicsEffect::PadToTransparentBorder)

    {}

    enum InvalidateReason

    {

        TransformChanged,

        EffectRectChanged,

        SourceChanged

    };

    virtual ~QGraphicsEffectSourcePrivate();

    virtual void detach() = 0;

    virtual QRectF boundingRect(Qt::CoordinateSystem system) const = 0;

    virtual QRect deviceRect() const = 0;

    virtual const QGraphicsItem *graphicsItem() const = 0;

    virtual const QWidget *widget() const = 0;

    virtual const QStyleOption *styleOption() const = 0;

    virtual void draw(QPainter *p) = 0;

    virtual void update() = 0;

    virtual bool isPixmap() const = 0;

    virtual QPixmap pixmap(Qt::CoordinateSystem system, QPoint *offset = 0,

                           QGraphicsEffect::PixmapPadMode mode = QGraphicsEffect::PadToTransparentBorder) const = 0;

    virtual void effectBoundingRectChanged() = 0;

    void setCachedOffset(const QPoint &offset);

    void invalidateCache(InvalidateReason reason = SourceChanged) const;

    Qt::CoordinateSystem currentCachedSystem() const { return m_cachedSystem; }

    QGraphicsEffect::PixmapPadMode currentCachedMode() const { return m_cachedMode; }

    friend class QGraphicsScenePrivate;

    friend class QGraphicsItem;

    friend class QGraphicsItemPrivate;

private:

    mutable Qt::CoordinateSystem m_cachedSystem;

    mutable QGraphicsEffect::PixmapPadMode m_cachedMode;

    mutable QPoint m_cachedOffset;

    mutable QPixmapCache::Key m_cacheKey;

};

class Q_GUI_EXPORT QGraphicsEffectPrivate : public QObjectPrivate

{

    Q_DECLARE_PUBLIC(QGraphicsEffect)

public:

    QGraphicsEffectPrivate() : source(0), isEnabled(1) {}

    inline void setGraphicsEffectSource(QGraphicsEffectSource *newSource)

    {

        QGraphicsEffect::ChangeFlags flags;

        if (source) {

            flags |= QGraphicsEffect::SourceDetached;

            source->d_func()->invalidateCache();

            source->d_func()->detach();

            delete source;

        }

        source = newSource;

        if (newSource)

            flags |= QGraphicsEffect::SourceAttached;

        q_func()->sourceChanged(flags);

    }

    QGraphicsEffectSource *source;

    QRectF boundingRect;

    quint32 isEnabled : 1;

    quint32 padding : 31; // feel free to use

};

class QGraphicsColorizeEffectPrivate : public QGraphicsEffectPrivate

{

    Q_DECLARE_PUBLIC(QGraphicsColorizeEffect)

public:

    QGraphicsColorizeEffectPrivate()

        : opaque(true)

    {

        filter = new QPixmapColorizeFilter;

    }

    ~QGraphicsColorizeEffectPrivate() { delete filter; }

    QPixmapColorizeFilter *filter;

    quint32 opaque : 1;

    quint32 padding : 31;

};

class QGraphicsBlurEffectPrivate : public QGraphicsEffectPrivate

{

    Q_DECLARE_PUBLIC(QGraphicsBlurEffect)

public:

    QGraphicsBlurEffectPrivate() : filter(new QPixmapBlurFilter) {}

    ~QGraphicsBlurEffectPrivate() { delete filter; }

    QPixmapBlurFilter *filter;

};

class QGraphicsDropShadowEffectPrivate : public QGraphicsEffectPrivate

{

    Q_DECLARE_PUBLIC(QGraphicsDropShadowEffect)

public:

    QGraphicsDropShadowEffectPrivate() : filter(new QPixmapDropShadowFilter) {}

    ~QGraphicsDropShadowEffectPrivate() { delete filter; }

    QPixmapDropShadowFilter *filter;

};

class QGraphicsOpacityEffectPrivate : public QGraphicsEffectPrivate

{

    Q_DECLARE_PUBLIC(QGraphicsOpacityEffect)

public:

    QGraphicsOpacityEffectPrivate()

        : opacity(qreal(0.7)), isFullyTransparent(0), isFullyOpaque(0), hasOpacityMask(0) {}

    ~QGraphicsOpacityEffectPrivate() {}

    qreal opacity;

    QBrush opacityMask;

    uint isFullyTransparent : 1;

    uint isFullyOpaque : 1;

    uint hasOpacityMask : 1;

};

QT_END_NAMESPACE

#endif //QT_NO_GRAPHICSEFFECT

#endif // QGRAPHICSEFFECT_P_H