Merge branch 'master' of git@scm.dev.nokia.troll.no:qt/qt

4 files changed, 1440 insertions, 0 deletions

diff --git a/src/gui/effects/effects.pri b/src/gui/effects/effects.pri
new file mode 100644
index 0000000..0ebf96f
--- /dev/null
+++ b/src/gui/effects/effects.pri
@@ -0,0 +1,4 @@
+HEADERS += effects/qgraphicseffect.h \
+    effects/qgraphicseffect_p.h
+
+SOURCES += effects/qgraphicseffect.cpp
diff --git a/src/gui/effects/qgraphicseffect.cpp b/src/gui/effects/qgraphicseffect.cpp
new file mode 100644
index 0000000..fbd53b0
--- /dev/null
+++ b/src/gui/effects/qgraphicseffect.cpp
@@ -0,0 +1,958 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** 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 either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at http://qt.nokia.com/contact.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+/*!
+    \class QGraphicsEffect
+    \brief The QGraphicsEffect class is the base class for all graphics effects.
+    \since 4.6
+    \ingroup multimedia
+    \ingroup graphicsview-api
+
+    Effects alter the appearance of elements by hooking into the rendering
+    pipeline and operating between the source (e.g., a QGraphicsPixmapItem),
+    and the destination device (e.g., QGraphicsView's viewport). Effects can be
+    disabled by calling setEnabled(); if the effect is disabled, the source is
+    rendered directly.
+
+    If you want to add a visual effect to a e.g. a QGraphicsItem, you can either use
+    one of the standard effects, or create your own effect by making a subclass
+    of QGraphicsEffect. The effect can then be installed on the item by calling
+    QGraphicsItem::setGraphicsEffect.
+
+    Qt provides several standard effects, including:
+
+    \list
+    \o QGraphicsGrayScaleEffect - renders the item in shades of gray
+    \o QGraphicsColorizeEffect - renders the item in shades of any given color
+    \o QGraphicsPixelizeEffect - pixelizes the item with any pixel size
+    \o QGraphicsBlurEffect - blurs the item by a given radius
+    \o QGraphicsDropShadowEffect - renders a dropshadow behind the item
+    \o QGraphicsOpacityEffect - renders the item with an opacity
+    \o QGrahicsShaderEffect - renders the item with a pixel shader fragment
+    \endlist
+
+    If all you want is to add an effect to an item, you should visit the
+    documentation for the specific effect to learn more about how each effect
+    can be used.
+
+    If you want to create your own custom effect, you can start by creating a
+    subclass of QGraphicsEffect (or any of the existing effects), and
+    reimplement the virtual function draw(). This function is called whenever
+    the effect needs to redraw. draw() has two arguments: the painter, and a
+    pointer to the source (QGraphicsEffectSource). The source provides extra
+    context information, such as a pointer to the item that is rendering the
+    effect, any cached pixmap data, and the device rect bounds. See the draw()
+    documentation for more details. You can also get a pointer to the current
+    source by calling source().
+
+    If your effect changes, you can call update() to request a redraw. If your
+    custom effect changes the bounding rectangle of the source (e.g., a radial
+    glow effect may need to apply an extra margin), you can reimplement the
+    virtual boundingRectFor() function, and call updateBoundingRect() to notify
+    the framework whenever this rectangle changes. The virtual
+    sourceBoundingRectChanged() function is called to notify the effects that
+    the source's bounding rectangle has changed (e.g., if the source is a
+    QGraphicsRectItem, then if the rectangle parameters have changed).
+
+    \sa QGraphicsItem::setGraphicsEffect(), QWidget::setGraphicsEffect(),
+    QGraphicsEffectSource
+*/
+
+#include "qgraphicseffect_p.h"
+
+#include <QtGui/qimage.h>
+#include <QtGui/qpainter.h>
+#include <QtCore/qrect.h>
+#include <QtCore/qdebug.h>
+
+QT_BEGIN_NAMESPACE
+
+/*!
+    \class QGraphicsEffectSource
+    \brief The QGraphicsEffectSource represents the source of which a QGraphicsEffect
+    is installed on.
+    \since 4.6
+
+    When a QGraphicsEffect is installed on e.g. a QGraphicsItem, this class will act as
+    a wrapper around QGraphicsItem. E.g. calling update() is effectively the same as
+    calling QGraphicsItem::update().
+
+    It also provides a pixmap() function which creates a pixmap with the source
+    painted into it.
+
+    \sa QGraphicsItem::setGraphicsEffect(), QWidget::setGraphicsEffect.
+*/
+QGraphicsEffectSource::QGraphicsEffectSource(QGraphicsEffectSourcePrivate &dd, QObject *parent)
+    : QObject(dd, parent)
+{}
+
+QGraphicsEffectSource::~QGraphicsEffectSource()
+{}
+
+/*!
+    Returns the bounds of the current painter's device.
+
+    This function is useful when you e.g. want to draw something in device coordinates
+    and want to make sure the size of the pixmap is not bigger than the device's size.
+
+    Note that calling QGraphicsEffectSource::pixmap(Qt::DeviceCoordinates) always returns
+    a pixmap which is bound to the device's size.
+
+    \sa pixmap()
+*/
+QRect QGraphicsEffectSource::deviceRect() const
+{
+    return d_func()->deviceRect();
+}
+
+/*!
+    Returns the bounding rectangle of the source mapped to the \a system specified.
+
+    \sa draw()
+*/
+QRectF QGraphicsEffectSource::boundingRect(Qt::CoordinateSystem system) const
+{
+    return d_func()->boundingRect(system);
+}
+
+/*!
+    Returns a pointer to the item if this source is a QGraphicsItem;
+    otherwise returns 0;
+
+    \sa widget()
+*/
+const QGraphicsItem *QGraphicsEffectSource::graphicsItem() const
+{
+    return d_func()->graphicsItem();
+}
+
+/*!
+    Returns a pointer to the widget if this source is a QWidget;
+    otherwise returns 0;
+
+    \sa graphicsItem()
+*/
+const QWidget *QGraphicsEffectSource::widget() const
+{
+    return d_func()->widget();
+}
+
+/*!
+    Returns a pointer to the style options (used when drawing the source)
+    if available; otherwise returns 0.
+
+    \sa graphicsItem(), widget()
+*/
+const QStyleOption *QGraphicsEffectSource::styleOption() const
+{
+    return d_func()->styleOption();
+}
+
+/*!
+    Draws the source using the \a painter specified.
+
+    This function should only be called from QGraphicsEffect::draw().
+    For example:
+
+    \snippet doc/src/snippets/code/src_gui_effects_qgraphicseffect.cpp 0
+
+    \sa QGraphicsEffect::draw()
+*/
+
+void QGraphicsEffectSource::draw(QPainter *painter)
+{
+    d_func()->draw(painter);
+}
+
+/*!
+    Schedules a redraw of the source. You can call this function whenever the
+    source needs to be redrawn.
+
+    \sa QGraphicsEffect::updateBoundingRect(), QWidget::update(), QGraphicsItem::update(),
+*/
+void QGraphicsEffectSource::update()
+{
+    d_func()->update();
+}
+
+/*!
+    Returns true if the source effectively is a pixmap, e.g. a QGraphicsPixmapItem.
+
+    This function is useful for optimization purposes, e.g. there's no point in
+    drawing the source in device coordinates to avoid pixmap scaling if this function
+    returns true; the source pixmap will be scaled anyways.
+*/
+bool QGraphicsEffectSource::isPixmap() const
+{
+    return d_func()->isPixmap();
+}
+
+/*!
+    Returns a pixmap with the source painted into it. The \a system specifies which
+    coordinate system to be used for the source. The optional out parameter
+    \a offset returns the offset of which the pixmap should be painted
+    at using the current painter.
+
+    Note that the returned pixmap is bound to the current painter's device
+    rect when the specified \a system is Qt::DeviceCoordinates.
+
+    \sa QGraphicsEffect::draw(), boundingRect(), deviceRect()
+*/
+QPixmap QGraphicsEffectSource::pixmap(Qt::CoordinateSystem system, QPoint *offset) const
+{
+    return d_func()->pixmap(system, offset);
+}
+
+/*!
+    Constructs a new QGraphicsEffect instance.
+*/
+QGraphicsEffect::QGraphicsEffect(QObject *parent)
+    : QObject(*new QGraphicsEffectPrivate, parent)
+{
+}
+
+/*!
+    \internal
+*/
+QGraphicsEffect::QGraphicsEffect(QGraphicsEffectPrivate &dd, QObject *parent)
+    : QObject(dd, parent)
+{
+}
+
+/*!
+    Removes the effect from the source, and destroys the graphics effect.
+*/
+QGraphicsEffect::~QGraphicsEffect()
+{
+    Q_D(QGraphicsEffect);
+    d->setGraphicsEffectSource(0);
+}
+
+/*!
+    Returns the bounding rectangle for this effect (i.e., the bounding
+    rectangle of the source, adjusted by any margins applied by the effect
+    itself).
+
+    \sa boundingRectFor(), updateBoundingRect()
+*/
+QRectF QGraphicsEffect::boundingRect() const
+{
+    Q_D(const QGraphicsEffect);
+    if (d->source)
+        return boundingRectFor(d->source->boundingRect());
+    return QRectF();
+}
+
+/*!
+    Returns the bounding rectangle for this effect, given the provided source
+    \a rect. When writing you own custom effect, you must call
+    updateBoundingRect() whenever any parameters are changed that may cause
+    this this function to return a different value.
+
+    \sa boundingRect()
+*/
+QRectF QGraphicsEffect::boundingRectFor(const QRectF &rect) const
+{
+    return rect;
+}
+
+/*!
+    \property QGraphicsEffect::enabled
+    \brief whether the effect is enabled or not.
+
+    If an effect is disabled, the source will be rendered with as normal, with
+    no interference from the effect. If the effect is enabled (default), the
+    source will be rendered with the effect applied.
+
+    This property is provided so that you can disable certain effects on slow
+    platforms, in order to ensure that the user interface is responsive.
+
+    \sa enabledChanged()
+*/
+bool QGraphicsEffect::isEnabled() const
+{
+    Q_D(const QGraphicsEffect);
+    return d->isEnabled;
+}
+
+void QGraphicsEffect::setEnabled(bool enable)
+{
+    Q_D(QGraphicsEffect);
+    if (d->isEnabled == enable)
+        return;
+
+    d->isEnabled = enable;
+    if (d->source)
+        d->source->update();
+    emit enabledChanged(enable);
+}
+
+/*!
+    \fn void QGraphicsEffect::enabledChanged(bool enabled)
+
+    This signal is emitted whenever the effect is enabled or disabled.
+
+    \sa isEnabled()
+*/
+
+/*!
+    Returns a pointer to the source, which provides extra context information
+    that can be useful for the effect.
+
+    \sa draw()
+*/
+QGraphicsEffectSource *QGraphicsEffect::source() const
+{
+    Q_D(const QGraphicsEffect);
+    return d->source;
+}
+
+/*!
+    This function notifies the effect framework that the effect's bounding
+    rectangle has changed. As a custom effect author, you must call this
+    function whenever you change any parameters that will cause the virtual
+    boundingRectFor() function to return a different value.
+
+    \sa boundingRectFor(), boundingRect()
+*/
+void QGraphicsEffect::updateBoundingRect()
+{
+    Q_D(QGraphicsEffect);
+    if (d->source)
+        d->source->update();
+}
+
+/*!
+    \fn virtual void QGraphicsEffect::draw(QPainter *painter,
+    QGraphicsEffectSource *source) = 0
+
+    This pure virtual function draws the effect and is called whenever the source()
+    needs to be drawn.
+
+    Reimplement this function in a QGraphicsEffect subclass to provide the effect's
+    drawing implementation, using \a painter. The \a source parameter is provided
+    for convenience; its value is the same as source(). Example:
+
+    \snippet doc/src/snippets/code/src_gui_effects_qgraphicseffect.cpp 1
+
+    Note that this function should not be called explicitly by the user, since it's
+    meant for re-implementation purposes only.
+
+    \sa QGraphicsEffectSource
+*/
+
+/*!
+    \enum QGraphicsEffect::ChangeFlag
+
+    This enum describes what has changed in QGraphicsEffectSource.
+
+    \value SourceAttached The effect is installed on a source.
+    \value SourceDetached The effect is uninstalled on a source.
+    \value SourceBoundingRectChanged The bounding rect of the source has changed.
+    \value SourceInvalidated The visual appearance of the source has changed.
+*/
+
+/*!
+    This virtual function is called by QGraphicsEffect to notify the effect
+    that the source has changed. If the effect applies any cache, then this
+    cache must be purged in order to reflect the new appearance of the source.
+
+    The \a flags describes what has changed.
+*/
+void QGraphicsEffect::sourceChanged(ChangeFlags flags)
+{
+    Q_UNUSED(flags);
+}
+
+/*!
+    \class QGraphicsGrayscaleEffect
+    \brief The QGraphicsGrayscaleEffect class provides a grayscale effect.
+    \since 4.6
+
+    A grayscale effect renders the source in shades of gray.
+
+    \sa QGraphicsColorizeEffect
+*/
+QGraphicsGrayscaleEffect::QGraphicsGrayscaleEffect(QObject *parent)
+    : QGraphicsEffect(*new QGraphicsGrayscaleEffectPrivate, parent)
+{
+}
+
+QGraphicsGrayscaleEffect::~QGraphicsGrayscaleEffect()
+{
+}
+
+void QGraphicsGrayscaleEffect::draw(QPainter *painter, QGraphicsEffectSource *source)
+{
+    Q_D(QGraphicsGrayscaleEffect);
+    QPoint offset;
+    if (source->isPixmap()) {
+        // No point in drawing in device coordinates (pixmap will be scaled anyways).
+        const QPixmap pixmap = source->pixmap(Qt::LogicalCoordinates, &offset);
+        d->filter->draw(painter, offset, pixmap);
+        return;
+    }
+
+    // Draw pixmap in device coordinates to avoid pixmap scaling;
+    const QPixmap pixmap = source->pixmap(Qt::DeviceCoordinates, &offset);
+    QTransform restoreTransform = painter->worldTransform();
+    painter->setWorldTransform(QTransform());
+    d->filter->draw(painter, offset, pixmap);
+    painter->setWorldTransform(restoreTransform);
+
+}
+
+/*!
+    \class QGraphicsColorizeEffect
+    \brief The QGraphicsColorizeEffect provides a colorize effect.
+    \since 4.6
+
+    A colorize effect renders the source with a tint of its color(). The
+    color can be modified using the setColor() function.
+
+    By default, the color is light blue (QColor(0, 0, 192)).
+
+    \sa QGraphicsGrayscaleEffect
+*/
+QGraphicsColorizeEffect::QGraphicsColorizeEffect(QObject *parent)
+    : QGraphicsEffect(*new QGraphicsColorizeEffectPrivate, parent)
+{
+}
+
+QGraphicsColorizeEffect::~QGraphicsColorizeEffect()
+{
+}
+
+/*!
+    Returns the color.
+
+    \sa setColor(), colorChanged()
+*/
+QColor QGraphicsColorizeEffect::color() const
+{
+    Q_D(const QGraphicsColorizeEffect);
+    return d->filter->color();
+}
+
+/*!
+    Sets the color to the \a color specified.
+
+    \sa color(), colorChanged()
+*/
+void QGraphicsColorizeEffect::setColor(const QColor &color)
+{
+    Q_D(QGraphicsColorizeEffect);
+    if (d->filter->color() == color)
+        return;
+
+    d->filter->setColor(color);
+    emit colorChanged(color);
+}
+
+/*!
+    \fn void QGraphicsColorizeEffect::colorChanged(const QColor &color)
+
+    This signal is emitted whenever the effect's color changes.
+*/
+
+void QGraphicsColorizeEffect::draw(QPainter *painter, QGraphicsEffectSource *source)
+{
+    Q_D(QGraphicsColorizeEffect);
+    QPoint offset;
+    if (source->isPixmap()) {
+        // No point in drawing in device coordinates (pixmap will be scaled anyways).
+        const QPixmap pixmap = source->pixmap(Qt::LogicalCoordinates, &offset);
+        d->filter->draw(painter, offset, pixmap);
+        return;
+    }
+
+    // Draw pixmap in deviceCoordinates to avoid pixmap scaling.
+    const QPixmap pixmap = source->pixmap(Qt::DeviceCoordinates, &offset);
+    QTransform restoreTransform = painter->worldTransform();
+    painter->setWorldTransform(QTransform());
+    d->filter->draw(painter, offset, pixmap);
+    painter->setWorldTransform(restoreTransform);
+}
+
+/*!
+    \class QGraphicsPixelizeEffect
+    \brief The QGraphicsPixelizeEffect provides a pixelize effect.
+    \since 4.6
+
+    A pixelize effect renders the source in lower resolution. This effect
+    is useful for reducing details, in e.g. a censorship. The resolution
+    can be modified using the setPixelSize() function.
+
+    By default, the pixel size is 3.
+
+    \sa QGraphicsBlurEffect
+*/
+QGraphicsPixelizeEffect::QGraphicsPixelizeEffect(QObject *parent)
+    : QGraphicsEffect(*new QGraphicsPixelizeEffectPrivate, parent)
+{
+}
+
+QGraphicsPixelizeEffect::~QGraphicsPixelizeEffect()
+{
+}
+
+/*!
+    Returns the size of a pixel.
+
+    \sa setPixelSize(), pixelSizeChanged()
+*/
+int QGraphicsPixelizeEffect::pixelSize() const
+{
+    Q_D(const QGraphicsPixelizeEffect);
+    return d->pixelSize;
+}
+
+/*!
+    Sets the size of a pixel to the \a size specified.
+
+    Setting the \a size to e.g. 2 means two pixels in the source will
+    be used to represent one pixel. Using a bigger size results in
+    lower resolution.
+
+    \sa pixelSize(), pixelSizeChanged()
+*/
+void QGraphicsPixelizeEffect::setPixelSize(int size)
+{
+    Q_D(QGraphicsPixelizeEffect);
+    if (d->pixelSize == size)
+        return;
+
+    d->pixelSize = size;
+    emit pixelSizeChanged(size);
+}
+
+/*!
+    \fn void QGraphicsPixelizeEffect::pixelSizeChanged(int size)
+
+    This signal is emitted whenever the effect's pixel size changes.
+*/
+
+static inline void pixelize(QImage *image, int pixelSize)
+{
+    Q_ASSERT(pixelSize > 0);
+    Q_ASSERT(image);
+    int width = image->width();
+    int height = image->height();
+    for (int y = 0; y < height; y += pixelSize) {
+        int ys = qMin(height - 1, y + pixelSize / 2);
+        QRgb *sbuf = reinterpret_cast<QRgb*>(image->scanLine(ys));
+        for (int x = 0; x < width; x += pixelSize) {
+            int xs = qMin(width - 1, x + pixelSize / 2);
+            QRgb color = sbuf[xs];
+            for (int yi = 0; yi < qMin(pixelSize, height - y); ++yi) {
+                QRgb *buf = reinterpret_cast<QRgb*>(image->scanLine(y + yi));
+                for (int xi = 0; xi < qMin(pixelSize, width - x); ++xi)
+                    buf[x + xi] = color;
+            }
+        }
+    }
+}
+
+void QGraphicsPixelizeEffect::draw(QPainter *painter, QGraphicsEffectSource *source)
+{
+    Q_D(QGraphicsPixelizeEffect);
+    if (d->pixelSize <= 0) {
+        source->draw(painter);
+        return;
+    }
+
+    QPoint offset;
+    if (source->isPixmap()) {
+        const QPixmap pixmap = source->pixmap(Qt::LogicalCoordinates, &offset);
+        QImage image = pixmap.toImage().convertToFormat(QImage::Format_ARGB32);
+        pixelize(&image, d->pixelSize);
+        painter->drawImage(offset, image);
+        return;
+    }
+
+    // Draw pixmap in device coordinates to avoid pixmap scaling.
+    const QPixmap pixmap = source->pixmap(Qt::DeviceCoordinates, &offset);
+
+    // pixelize routine
+    QImage image = pixmap.toImage().convertToFormat(QImage::Format_ARGB32);
+    pixelize(&image, d->pixelSize);
+
+    QTransform restoreTransform = painter->worldTransform();
+    painter->setWorldTransform(QTransform());
+    painter->drawImage(offset, image);
+    painter->setWorldTransform(restoreTransform);
+}
+
+/*!
+    \class QGraphicsBlurEffect
+    \brief The QGraphicsBlurEffect provides a blur effect.
+    \since 4.6
+
+    A blur effect blurs the source. This effect is useful for reducing details,
+    e.g. when the source loses focus and you want to draw attention to other
+    elements. The level of detail can be modified using the setBlurRadius()
+    function.
+
+    By default, the blur radius is 5 pixels.
+
+    \sa QGraphicsPixelizeEffect
+*/
+QGraphicsBlurEffect::QGraphicsBlurEffect(QObject *parent)
+    : QGraphicsEffect(*new QGraphicsBlurEffectPrivate, parent)
+{
+}
+
+QGraphicsBlurEffect::~QGraphicsBlurEffect()
+{
+}
+
+/*!
+    Returns the blur radius.
+
+    \sa setBlurRadius(), blurRadiusChanged()
+*/
+int QGraphicsBlurEffect::blurRadius() const
+{
+    Q_D(const QGraphicsBlurEffect);
+    return d->filter->radius();
+}
+
+/*!
+    Sets the blur radius to the \a radius specified.
+
+    Using a smaller radius results in a sharper appearance, whereas a
+    bigger radius results in a more blurry appearance.
+
+    \sa blurRadius(), blurRadiusChanged()
+*/
+void QGraphicsBlurEffect::setBlurRadius(int radius)
+{
+    Q_D(QGraphicsBlurEffect);
+    if (d->filter->radius() == radius)
+        return;
+
+    d->filter->setRadius(radius);
+    updateBoundingRect();
+    emit blurRadiusChanged(radius);
+}
+
+/*!
+    \fn void QGraphicsBlurEffect::blurRadiusChanged(int radius)
+
+    This signal is emitted whenever the effect's blur radius changes.
+*/
+
+QRectF QGraphicsBlurEffect::boundingRectFor(const QRectF &rect) const
+{
+    Q_D(const QGraphicsBlurEffect);
+    return d->filter->boundingRectFor(rect);
+}
+
+void QGraphicsBlurEffect::draw(QPainter *painter, QGraphicsEffectSource *source)
+{
+    Q_D(QGraphicsBlurEffect);
+    if (d->filter->radius() <= 0) {
+        source->draw(painter);
+        return;
+    }
+
+    QPoint offset;
+    if (source->isPixmap()) {
+        // No point in drawing in device coordinates (pixmap will be scaled anyways).
+        const QPixmap pixmap = source->pixmap(Qt::LogicalCoordinates, &offset);
+        d->filter->draw(painter, offset, pixmap);
+        return;
+    }
+
+    // Draw pixmap in device coordinates to avoid pixmap scaling.
+    const QPixmap pixmap = source->pixmap(Qt::DeviceCoordinates, &offset);
+    QTransform restoreTransform = painter->worldTransform();
+    painter->setWorldTransform(QTransform());
+    d->filter->draw(painter, offset, pixmap);
+    painter->setWorldTransform(restoreTransform);
+}
+
+/*!
+    \class QGraphicsDropShadowEffect
+    \brief The QGraphicsDropShadowEffect class provides a drop shadow effect.
+    \since 4.6
+
+    A drop shadow effect renders the source with a drop shadow. The color of
+    the drop shadow can be modified using the setColor() function, the drop
+    shadow offset can be modified using the setOffset function, and the blur
+    radius of the drop shadow can be changed through the setBlurRadius()
+    function.
+
+    By default, the drop shadow is a semi-transparent dark gray
+    (QColor(63, 63, 63, 180)) shadow, blurred with a radius of 1 at an
+    offset of 8 pixels towards the lower right.
+*/
+QGraphicsDropShadowEffect::QGraphicsDropShadowEffect(QObject *parent)
+    : QGraphicsEffect(*new QGraphicsDropShadowEffectPrivate, parent)
+{
+}
+
+QGraphicsDropShadowEffect::~QGraphicsDropShadowEffect()
+{
+}
+
+/*!
+    Returns the shadow offset in pixels.
+
+    \sa setOffset(), blurRadius(), color(), offsetChanged()
+*/
+QPointF QGraphicsDropShadowEffect::offset() const
+{
+    Q_D(const QGraphicsDropShadowEffect);
+    return d->filter->offset();
+}
+
+/*!
+    Sets the shadow offset in pixels to the \a offset specified.
+
+    \sa offset(), setBlurRadius(), setColor(), offsetChanged()
+*/
+void QGraphicsDropShadowEffect::setOffset(const QPointF &offset)
+{
+    Q_D(QGraphicsDropShadowEffect);
+    if (d->filter->offset() == offset)
+        return;
+
+    d->filter->setOffset(offset);
+    updateBoundingRect();
+    emit offsetChanged(offset);
+}
+
+/*!
+    \fn void QGraphicsDropShadowEffect::offsetChanged(const QPointF &offset)
+
+    This signal is emitted whenever the effect's shadow offset changes.
+*/
+
+/*!
+    Returns the radius in pixels of the blur on the drop shadow.
+
+    \sa setBlurRadius(), color(), offset(), blurRadiusChanged()
+*/
+int QGraphicsDropShadowEffect::blurRadius() const
+{
+    Q_D(const QGraphicsDropShadowEffect);
+    return d->filter->blurRadius();
+}
+
+/*!
+    Sets the radius in pixels of the blur on the drop shadow to the
+    \a blurRadius specified.
+
+    Using a smaller radius results in a sharper shadow, whereas using
+    a bigger radius results in a more blurry shadow.
+
+    \sa blurRadius(), setColor(), setOffset(), blurRadiusChanged()
+*/
+void QGraphicsDropShadowEffect::setBlurRadius(int blurRadius)
+{
+    Q_D(QGraphicsDropShadowEffect);
+    if (d->filter->blurRadius() == blurRadius)
+        return;
+
+    d->filter->setBlurRadius(blurRadius);
+    updateBoundingRect();
+    emit blurRadiusChanged(blurRadius);
+}
+
+/*!
+    \fn void QGraphicsDropShadowEffect::blurRadiusChanged(int blurRadius)
+
+    This signal is emitted whenever the effect's blur radius changes.
+*/
+
+/*!
+    Returns the color of the drop shadow.
+
+    \sa setColor, offset(), blurRadius(), colorChanged()
+*/
+QColor QGraphicsDropShadowEffect::color() const
+{
+    Q_D(const QGraphicsDropShadowEffect);
+    return d->filter->color();
+}
+
+/*!
+    Sets the color of the drop shadow to the \a color specified.
+
+    \sa color(), setOffset(), setBlurRadius(), colorChanged()
+*/
+void QGraphicsDropShadowEffect::setColor(const QColor &color)
+{
+    Q_D(QGraphicsDropShadowEffect);
+    if (d->filter->color() == color)
+        return;
+
+    d->filter->setColor(color);
+    emit colorChanged(color);
+}
+
+/*!
+    \fn void QGraphicsDropShadowEffect::colorChanged(const QColor &color)
+
+    This signal is emitted whenever the effect's color changes.
+*/
+
+QRectF QGraphicsDropShadowEffect::boundingRectFor(const QRectF &rect) const
+{
+    Q_D(const QGraphicsDropShadowEffect);
+    return d->filter->boundingRectFor(rect);
+}
+
+void QGraphicsDropShadowEffect::draw(QPainter *painter, QGraphicsEffectSource *source)
+{
+    Q_D(QGraphicsDropShadowEffect);
+    if (d->filter->blurRadius() <= 0 && d->filter->offset().isNull()) {
+        source->draw(painter);
+        return;
+    }
+
+    QPoint offset;
+    if (source->isPixmap()) {
+        // No point in drawing in device coordinates (pixmap will be scaled anyways).
+        const QPixmap pixmap = source->pixmap(Qt::LogicalCoordinates, &offset);
+        d->filter->draw(painter, offset, pixmap);
+        return;
+    }
+
+    // Draw pixmap in device coordinates to avoid pixmap scaling.
+    const QPixmap pixmap = source->pixmap(Qt::DeviceCoordinates, &offset);
+    QTransform restoreTransform = painter->worldTransform();
+    painter->setWorldTransform(QTransform());
+    d->filter->draw(painter, offset, pixmap);
+    painter->setWorldTransform(restoreTransform);
+}
+
+/*!
+    \class QGraphicsOpacityEffect
+    \brief The QGraphicsOpacityEffect class provides an opacity effect.
+    \since 4.6
+
+    An opacity effects renders the source with an opacity. This effect is useful
+    for making the source semi-transparent, in e.g. a fade-in/fade-out sequence.
+    The opacity can be modified using the setOpacity() function.
+
+    By default, the opacity is 0.7.
+*/
+QGraphicsOpacityEffect::QGraphicsOpacityEffect(QObject *parent)
+    : QGraphicsEffect(*new QGraphicsOpacityEffectPrivate, parent)
+{
+}
+
+QGraphicsOpacityEffect::~QGraphicsOpacityEffect()
+{
+}
+
+/*!
+    Returns the opacity.
+
+    \sa setOpacity(), opacityChanged()
+*/
+qreal QGraphicsOpacityEffect::opacity() const
+{
+    Q_D(const QGraphicsOpacityEffect);
+    return d->opacity;
+}
+
+/*!
+    Sets the opacity to the \a opacity specified. The value should be in
+    the range 0.0 to 1.0, where 0.0 is fully transparent and 1.0 is
+    fully opaque.
+
+    \sa opacity(), opacityChanged()
+*/
+void QGraphicsOpacityEffect::setOpacity(qreal opacity)
+{
+    Q_D(QGraphicsOpacityEffect);
+    opacity = qBound(qreal(0.0), opacity, qreal(1.0));
+
+    if (qFuzzyCompare(d->opacity, opacity))
+        return;
+
+    d->opacity = opacity;
+    emit opacityChanged(opacity);
+}
+
+/*!
+    \fn void QGraphicsOpacityEffect::opacityChanged(qreal opacity)
+
+    This signal is emitted whenever the effect's opacity changes.
+*/
+
+void QGraphicsOpacityEffect::draw(QPainter *painter, QGraphicsEffectSource *source)
+{
+    Q_D(QGraphicsOpacityEffect);
+
+    // Transparent; nothing to draw.
+    if (qFuzzyIsNull(d->opacity))
+        return;
+
+    // Opaque; draw directly without going through a pixmap.
+    if (qFuzzyIsNull(d->opacity - 1)) {
+        source->draw(painter);
+        return;
+    }
+
+    painter->save();
+    painter->setOpacity(d->opacity);
+
+    QPoint offset;
+    if (source->isPixmap()) {
+        // No point in drawing in device coordinates (pixmap will be scaled anyways).
+        const QPixmap pixmap = source->pixmap(Qt::LogicalCoordinates, &offset);
+        painter->drawPixmap(offset, pixmap);
+    } else {
+        // Draw pixmap in device coordinates to avoid pixmap scaling;
+        const QPixmap pixmap = source->pixmap(Qt::DeviceCoordinates, &offset);
+        painter->setWorldTransform(QTransform());
+        painter->drawPixmap(offset, pixmap);
+    }
+
+    painter->restore();
+}
+
+QT_END_NAMESPACE
+
diff --git a/src/gui/effects/qgraphicseffect.h b/src/gui/effects/qgraphicseffect.h
new file mode 100644
index 0000000..fef6531
--- /dev/null
+++ b/src/gui/effects/qgraphicseffect.h
@@ -0,0 +1,302 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** 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 either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at http://qt.nokia.com/contact.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QGRAPHICSEFFECT_H
+#define QGRAPHICSEFFECT_H
+
+#include <QtCore/qobject.h>
+#include <QtCore/qpoint.h>
+#include <QtCore/qrect.h>
+#include <QtGui/qcolor.h>
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+QT_MODULE(Gui)
+
+class QGraphicsItem;
+class QStyleOption;
+class QPainter;
+class QPixmap;
+
+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) 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 QWidget;
+    friend class QWidgetPrivate;
+};
+
+class QGraphicsEffectPrivate;
+class Q_GUI_EXPORT QGraphicsEffect : public QObject
+{
+    Q_OBJECT
+    Q_FLAGS(ChangeFlags)
+    Q_PROPERTY(bool enabled READ isEnabled WRITE setEnabled NOTIFY enabledChanged)
+public:
+    enum ChangeFlag {
+        SourceAttached = 0x1,
+        SourceDetached = 0x2,
+        SourceBoundingRectChanged = 0x4,
+        SourceInvalidated = 0x8
+    };
+    Q_DECLARE_FLAGS(ChangeFlags, ChangeFlag)
+
+    QGraphicsEffect(QObject *parent = 0);
+    virtual ~QGraphicsEffect();
+
+    virtual QRectF boundingRectFor(const QRectF &rect) const;
+    QRectF boundingRect() const;
+
+    QGraphicsEffectSource *source() const;
+
+    bool isEnabled() const;
+
+public Q_SLOTS:
+    void setEnabled(bool enable);
+    // ### add update() slot
+
+Q_SIGNALS:
+    void enabledChanged(bool enabled);
+
+protected:
+    QGraphicsEffect(QGraphicsEffectPrivate &d, QObject *parent = 0);
+    virtual void draw(QPainter *painter, QGraphicsEffectSource *source) = 0;
+    virtual void sourceChanged(ChangeFlags flags);
+    void updateBoundingRect();
+
+private:
+    Q_DECLARE_PRIVATE(QGraphicsEffect)
+    Q_DISABLE_COPY(QGraphicsEffect)
+    friend class QGraphicsItem;
+    friend class QGraphicsItemPrivate;
+    friend class QGraphicsScenePrivate;
+    friend class QWidget;
+    friend class QWidgetPrivate;
+};
+Q_DECLARE_OPERATORS_FOR_FLAGS(QGraphicsEffect::ChangeFlags)
+
+class QGraphicsGrayscaleEffectPrivate;
+class Q_GUI_EXPORT QGraphicsGrayscaleEffect: public QGraphicsEffect
+{
+    Q_OBJECT
+public:
+    QGraphicsGrayscaleEffect(QObject *parent = 0);
+    ~QGraphicsGrayscaleEffect();
+
+protected:
+    void draw(QPainter *painter, QGraphicsEffectSource *source);
+
+private:
+    Q_DECLARE_PRIVATE(QGraphicsGrayscaleEffect)
+    Q_DISABLE_COPY(QGraphicsGrayscaleEffect)
+};
+
+class QGraphicsColorizeEffectPrivate;
+class Q_GUI_EXPORT QGraphicsColorizeEffect: public QGraphicsEffect
+{
+    Q_OBJECT
+    Q_PROPERTY(QColor color READ color WRITE setColor NOTIFY colorChanged)
+public:
+    QGraphicsColorizeEffect(QObject *parent = 0);
+    ~QGraphicsColorizeEffect();
+
+    QColor color() const;
+
+public Q_SLOTS:
+    void setColor(const QColor &c);
+
+Q_SIGNALS:
+    void colorChanged(const QColor &color);
+
+protected:
+    void draw(QPainter *painter, QGraphicsEffectSource *source);
+
+private:
+    Q_DECLARE_PRIVATE(QGraphicsColorizeEffect)
+    Q_DISABLE_COPY(QGraphicsColorizeEffect)
+};
+
+class QGraphicsPixelizeEffectPrivate;
+class Q_GUI_EXPORT QGraphicsPixelizeEffect: public QGraphicsEffect
+{
+    Q_OBJECT
+    Q_PROPERTY(int pixelSize READ pixelSize WRITE setPixelSize NOTIFY pixelSizeChanged)
+public:
+    QGraphicsPixelizeEffect(QObject *parent = 0);
+    ~QGraphicsPixelizeEffect();
+
+    int pixelSize() const;
+
+public Q_SLOTS:
+    void setPixelSize(int pixelSize);
+
+Q_SIGNALS:
+    void pixelSizeChanged(int pixelSize);
+
+protected:
+    void draw(QPainter *painter, QGraphicsEffectSource *source);
+
+private:
+    Q_DECLARE_PRIVATE(QGraphicsPixelizeEffect)
+    Q_DISABLE_COPY(QGraphicsPixelizeEffect)
+};
+
+class QGraphicsBlurEffectPrivate;
+class Q_GUI_EXPORT QGraphicsBlurEffect: public QGraphicsEffect
+{
+    Q_OBJECT
+    Q_PROPERTY(int blurRadius READ blurRadius WRITE setBlurRadius NOTIFY blurRadiusChanged)
+public:
+    QGraphicsBlurEffect(QObject *parent = 0);
+    ~QGraphicsBlurEffect();
+
+    QRectF boundingRectFor(const QRectF &rect) const;
+    int blurRadius() const;
+
+public Q_SLOTS:
+    void setBlurRadius(int blurRadius);
+
+Q_SIGNALS:
+    void blurRadiusChanged(int blurRadius);
+
+protected:
+    void draw(QPainter *painter, QGraphicsEffectSource *source);
+
+private:
+    Q_DECLARE_PRIVATE(QGraphicsBlurEffect)
+    Q_DISABLE_COPY(QGraphicsBlurEffect)
+};
+
+class QGraphicsDropShadowEffectPrivate;
+class Q_GUI_EXPORT QGraphicsDropShadowEffect: public QGraphicsEffect
+{
+    Q_OBJECT
+    Q_PROPERTY(QPointF offset READ offset WRITE setOffset NOTIFY offsetChanged)
+    Q_PROPERTY(int blurRadius READ blurRadius WRITE setBlurRadius NOTIFY blurRadiusChanged)
+    Q_PROPERTY(QColor color READ color WRITE setColor NOTIFY colorChanged)
+public:
+    QGraphicsDropShadowEffect(QObject *parent = 0);
+    ~QGraphicsDropShadowEffect();
+
+    QRectF boundingRectFor(const QRectF &rect) const;
+    QPointF offset() const;
+    int blurRadius() const;
+    QColor color() const;
+
+public Q_SLOTS:
+    void setOffset(const QPointF &ofs);
+    inline void setOffset(qreal dx, qreal dy)
+    { setOffset(QPointF(dx, dy)); }
+    inline void setOffset(qreal d)
+    { setOffset(QPointF(d, d)); }
+    void setBlurRadius(int blurRadius);
+    void setColor(const QColor &color);
+
+Q_SIGNALS:
+    void offsetChanged(const QPointF &offset);
+    void blurRadiusChanged(int blurRadius);
+    void colorChanged(const QColor &color);
+
+protected:
+    void draw(QPainter *painter, QGraphicsEffectSource *source);
+
+private:
+    Q_DECLARE_PRIVATE(QGraphicsDropShadowEffect)
+    Q_DISABLE_COPY(QGraphicsDropShadowEffect)
+};
+
+class QGraphicsOpacityEffectPrivate;
+class Q_GUI_EXPORT QGraphicsOpacityEffect: public QGraphicsEffect
+{
+    Q_OBJECT
+    Q_PROPERTY(int opacity READ opacity WRITE setOpacity NOTIFY opacityChanged)
+public:
+    QGraphicsOpacityEffect(QObject *parent = 0);
+    ~QGraphicsOpacityEffect();
+
+    qreal opacity() const;
+
+public Q_SLOTS:
+    void setOpacity(qreal opacity);
+
+Q_SIGNALS:
+    void opacityChanged(qreal opacity);
+
+protected:
+    void draw(QPainter *painter, QGraphicsEffectSource *source);
+
+private:
+    Q_DECLARE_PRIVATE(QGraphicsOpacityEffect)
+    Q_DISABLE_COPY(QGraphicsOpacityEffect)
+};
+
+QT_END_NAMESPACE
+
+QT_END_HEADER
+
+#endif // QGRAPHICSEFFECT_H
+
diff --git a/src/gui/effects/qgraphicseffect_p.h b/src/gui/effects/qgraphicseffect_p.h
new file mode 100644
index 0000000..175bd99
--- /dev/null
+++ b/src/gui/effects/qgraphicseffect_p.h
@@ -0,0 +1,176 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** 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 either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at http://qt.nokia.com/contact.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#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 <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() {}
+    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;
+    friend class QGraphicsScenePrivate;
+    friend class QGraphicsItem;
+    friend class QGraphicsItemPrivate;
+};
+
+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();
+            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()
+    {
+        filter = new QPixmapColorizeFilter;
+        filter->setColor(Qt::black);
+    }
+    ~QGraphicsGrayscaleEffectPrivate() { delete filter; }
+
+    QPixmapColorizeFilter *filter;
+};
+
+class QGraphicsColorizeEffectPrivate : public QGraphicsEffectPrivate
+{
+    Q_DECLARE_PUBLIC(QGraphicsColorizeEffect)
+public:
+    QGraphicsColorizeEffectPrivate() { filter = new QPixmapColorizeFilter; }
+    ~QGraphicsColorizeEffectPrivate() { delete filter; }
+
+    QPixmapColorizeFilter *filter;
+};
+
+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(0.7) {}
+    ~QGraphicsOpacityEffectPrivate() {}
+
+    qreal opacity;
+};
+
+QT_END_NAMESPACE
+
+#endif // QGRAPHICSEFFECT_P_H
+