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

**

** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

** Contact: Nokia Corporation (qt-info@nokia.com)

**

** This file is part of the QtGui module of the Qt Toolkit.

**

** $QT_BEGIN_LICENSE:LGPL$

** No Commercial Usage

** This file contains pre-release code and may not be distributed.

** You may use this file in accordance with the terms and conditions

** contained in the Technology Preview License Agreement accompanying

** this package.

**

** GNU Lesser General Public License Usage

** Alternatively, this file may be used under the terms of the GNU Lesser

** General Public License version 2.1 as published by the Free Software

** Foundation and appearing in the file LICENSE.LGPL included in the

** packaging of this file.  Please review the following information to

** ensure the GNU Lesser General Public License version 2.1 requirements

** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

**

** In addition, as a special exception, Nokia gives you certain additional

** rights.  These rights are described in the Nokia Qt LGPL Exception

** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

**

** If you have questions regarding the use of this file, please contact

** Nokia at qt-info@nokia.com.

**

**

**

**

**

**

**

**

** $QT_END_LICENSE$

**

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

#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>

QT_BEGIN_NAMESPACE

class QGraphicsEffectSourcePrivate : public QObjectPrivate

{

    Q_DECLARE_PUBLIC(QGraphicsEffectSource)

public:

    QGraphicsEffectSourcePrivate() : QObjectPrivate() {}

    virtual ~QGraphicsEffectSourcePrivate() { invalidateCache(); }

    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) const = 0;

    virtual void effectBoundingRectChanged() = 0;

    void invalidateCache() const { QPixmapCache::remove(m_cacheKey); }

    friend class QGraphicsScenePrivate;

    friend class QGraphicsItem;

    friend class QGraphicsItemPrivate;

private:

    mutable Qt::CoordinateSystem m_cachedSystem;

    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()->detach();

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

            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 QGraphicsGrayscaleEffectPrivate : public QGraphicsEffectPrivate

{

    Q_DECLARE_PUBLIC(QGraphicsGrayscaleEffect)

public:

    QGraphicsGrayscaleEffectPrivate()

        : opaque(true)

    {

        filter = new QPixmapColorizeFilter;

        filter->setColor(Qt::black);

    }

    ~QGraphicsGrayscaleEffectPrivate() { delete filter; }

    QPixmapColorizeFilter *filter;

    quint32 opaque : 1;

    quint32 padding : 31;

};

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 QGraphicsPixelizeEffectPrivate : public QGraphicsEffectPrivate

{

    Q_DECLARE_PUBLIC(QGraphicsPixelizeEffect)

public:

    QGraphicsPixelizeEffectPrivate() : pixelSize(3) {}

    int pixelSize;

};

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;

};

class QGraphicsBloomEffectPrivate : public QGraphicsEffectPrivate

{

    Q_DECLARE_PUBLIC(QGraphicsBlurEffect)

public:

    QGraphicsBloomEffectPrivate() : brightness(70), strength(qreal(0.7)) {}

    QPixmapBlurFilter blurFilter;

    int colorTable[256];

    int brightness;

    qreal strength;

};

QT_END_NAMESPACE

#endif // QGRAPHICSEFFECT_P_H