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    41 

    42 #ifndef QGRAPHICSEFFECT_P_H

    43 #define QGRAPHICSEFFECT_P_H

    44 

    45 //

    46 //  W A R N I N G

    47 //  -------------

    48 //

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

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

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

    52 //

    53 // We mean it.

    54 //

    55 

    56 #include "qgraphicseffect.h"

    57 

    58 #include <QPixmapCache>

    59 

    60 #include <private/qobject_p.h>

    61 #include <private/qpixmapfilter_p.h>

    62 

    63 QT_BEGIN_NAMESPACE

    64 

    65 class QGraphicsEffectSourcePrivate : public QObjectPrivate

    66 {

    67     Q_DECLARE_PUBLIC(QGraphicsEffectSource)

    68 public:

    69     QGraphicsEffectSourcePrivate() : QObjectPrivate() {}

    70     virtual ~QGraphicsEffectSourcePrivate() { invalidateCache(); }

    71     virtual void detach() = 0;

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

    73     virtual QRect deviceRect() const = 0;

    74     virtual const QGraphicsItem *graphicsItem() const = 0;

    75     virtual const QWidget *widget() const = 0;

    76     virtual const QStyleOption *styleOption() const = 0;

    77     virtual void draw(QPainter *p) = 0;

    78     virtual void update() = 0;

    79     virtual bool isPixmap() const = 0;

    80     virtual QPixmap pixmap(Qt::CoordinateSystem system, QPoint *offset = 0) const = 0;

    81     virtual void effectBoundingRectChanged() = 0;

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

    83 

    84     friend class QGraphicsScenePrivate;

    85     friend class QGraphicsItem;

    86     friend class QGraphicsItemPrivate;

    87 

    88 private:

    89     mutable Qt::CoordinateSystem m_cachedSystem;

    90     mutable QPoint m_cachedOffset;

    91     mutable QPixmapCache::Key m_cacheKey;

    92 };

    93 

    94 class Q_GUI_EXPORT QGraphicsEffectPrivate : public QObjectPrivate

    95 {

    96     Q_DECLARE_PUBLIC(QGraphicsEffect)

    97 public:

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

    99 

   100     inline void setGraphicsEffectSource(QGraphicsEffectSource *newSource)

   101     {

   102         QGraphicsEffect::ChangeFlags flags;

   103         if (source) {

   104             flags |= QGraphicsEffect::SourceDetached;

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

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

   107             delete source;

   108         }

   109         source = newSource;

   110         if (newSource)

   111             flags |= QGraphicsEffect::SourceAttached;

   112         q_func()->sourceChanged(flags);

   113     }

   114 

   115     QGraphicsEffectSource *source;

   116     QRectF boundingRect;

   117     quint32 isEnabled : 1;

   118     quint32 padding : 31; // feel free to use

   119 };

   120 

   121 class QGraphicsGrayscaleEffectPrivate : public QGraphicsEffectPrivate

   122 {

   123     Q_DECLARE_PUBLIC(QGraphicsGrayscaleEffect)

   124 public:

   125     QGraphicsGrayscaleEffectPrivate()

   126         : opaque(true)

   127     {

   128         filter = new QPixmapColorizeFilter;

   129         filter->setColor(Qt::black);

   130     }

   131     ~QGraphicsGrayscaleEffectPrivate() { delete filter; }

   132 

   133     QPixmapColorizeFilter *filter;

   134     quint32 opaque : 1;

   135     quint32 padding : 31;

   136 };

   137 

   138 class QGraphicsColorizeEffectPrivate : public QGraphicsEffectPrivate

   139 {

   140     Q_DECLARE_PUBLIC(QGraphicsColorizeEffect)

   141 public:

   142     QGraphicsColorizeEffectPrivate()

   143         : opaque(true)

   144     {

   145         filter = new QPixmapColorizeFilter;

   146     }

   147     ~QGraphicsColorizeEffectPrivate() { delete filter; }

   148 

   149     QPixmapColorizeFilter *filter;

   150     quint32 opaque : 1;

   151     quint32 padding : 31;

   152 };

   153 

   154 class QGraphicsPixelizeEffectPrivate : public QGraphicsEffectPrivate

   155 {

   156     Q_DECLARE_PUBLIC(QGraphicsPixelizeEffect)

   157 public:

   158     QGraphicsPixelizeEffectPrivate() : pixelSize(3) {}

   159 

   160     int pixelSize;

   161 };

   162 

   163 class QGraphicsBlurEffectPrivate : public QGraphicsEffectPrivate

   164 {

   165     Q_DECLARE_PUBLIC(QGraphicsBlurEffect)

   166 public:

   167     QGraphicsBlurEffectPrivate() : filter(new QPixmapBlurFilter) {}

   168     ~QGraphicsBlurEffectPrivate() { delete filter; }

   169 

   170     QPixmapBlurFilter *filter;

   171 };

   172 

   173 class QGraphicsDropShadowEffectPrivate : public QGraphicsEffectPrivate

   174 {

   175     Q_DECLARE_PUBLIC(QGraphicsDropShadowEffect)

   176 public:

   177     QGraphicsDropShadowEffectPrivate() : filter(new QPixmapDropShadowFilter) {}

   178     ~QGraphicsDropShadowEffectPrivate() { delete filter; }

   179 

   180     QPixmapDropShadowFilter *filter;

   181 };

   182 

   183 class QGraphicsOpacityEffectPrivate : public QGraphicsEffectPrivate

   184 {

   185     Q_DECLARE_PUBLIC(QGraphicsOpacityEffect)

   186 public:

   187     QGraphicsOpacityEffectPrivate()

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

   189     ~QGraphicsOpacityEffectPrivate() {}

   190 

   191     qreal opacity;

   192     QBrush opacityMask;

   193     uint isFullyTransparent : 1;

   194     uint isFullyOpaque : 1;

   195     uint hasOpacityMask : 1;

   196 };

   197 

   198 class QGraphicsBloomEffectPrivate : public QGraphicsEffectPrivate

   199 {

   200     Q_DECLARE_PUBLIC(QGraphicsBlurEffect)

   201 public:

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

   203 

   204     QPixmapBlurFilter blurFilter;

   205     int colorTable[256];

   206     int brightness;

   207     qreal strength;

   208 };

   209 

   210 QT_END_NAMESPACE

   211 

   212 #endif // QGRAPHICSEFFECT_P_H

   213