diff options
Diffstat (limited to 'src/gui/effects/qgraphicseffect.cpp')
| -rw-r--r-- | src/gui/effects/qgraphicseffect.cpp | 499 |
1 files changed, 35 insertions, 464 deletions
diff --git a/src/gui/effects/qgraphicseffect.cpp b/src/gui/effects/qgraphicseffect.cpp index 96d35b0..9ed003c 100644 --- a/src/gui/effects/qgraphicseffect.cpp +++ b/src/gui/effects/qgraphicseffect.cpp @@ -65,9 +65,6 @@ \o QGraphicsDropShadowEffect - renders a dropshadow behind the item \o QGraphicsColorizeEffect - renders the item in shades of any given color \o QGraphicsOpacityEffect - renders the item with an opacity - \o QGraphicsPixelizeEffect - pixelizes the item with any pixel size - \o QGraphicsGrayscaleEffect - renders the item in shades of gray - \o QGraphicsBloomEffect - applies a blooming / glowing effect \endlist \img graphicseffect-effects.png @@ -100,6 +97,7 @@ */ #include "qgraphicseffect_p.h" +#include <QtGui/qgraphicsitem.h> #include <QtGui/qimage.h> #include <QtGui/qpainter.h> @@ -251,16 +249,22 @@ bool QGraphicsEffectSource::isPixmap() const \sa QGraphicsEffect::draw(), boundingRect(), deviceRect() */ -QPixmap QGraphicsEffectSource::pixmap(Qt::CoordinateSystem system, QPoint *offset) const +QPixmap QGraphicsEffectSource::pixmap(Qt::CoordinateSystem system, QPoint *offset, PixmapPadMode mode) const { Q_D(const QGraphicsEffectSource); + // Shortcut, no cache for childless pixmap items... + const QGraphicsItem *item = graphicsItem(); + if (system == Qt::LogicalCoordinates && mode == NoExpandPadMode && item && isPixmap()) { + return ((QGraphicsPixmapItem *) item)->pixmap(); + } + QPixmap pm; if (d->m_cachedSystem == system) QPixmapCache::find(d->m_cacheKey, &pm); if (pm.isNull()) { - pm = d->pixmap(system, &d->m_cachedOffset); + pm = d->pixmap(system, &d->m_cachedOffset, mode); d->m_cachedSystem = system; d->invalidateCache(); @@ -353,8 +357,10 @@ void QGraphicsEffect::setEnabled(bool enable) return; d->isEnabled = enable; - if (d->source) + if (d->source) { d->source->d_func()->effectBoundingRectChanged(); + d->source->d_func()->invalidateCache(); + } emit enabledChanged(enable); } @@ -408,8 +414,10 @@ QGraphicsEffectSource *QGraphicsEffect::source() const void QGraphicsEffect::updateBoundingRect() { Q_D(QGraphicsEffect); - if (d->source) + if (d->source) { d->source->d_func()->effectBoundingRectChanged(); + d->source->d_func()->invalidateCache(); + } } /*! @@ -458,96 +466,6 @@ void QGraphicsEffect::sourceChanged(ChangeFlags flags) } /*! - \class QGraphicsGrayscaleEffect - \brief The QGraphicsGrayscaleEffect class provides a grayscale effect. - \since 4.6 - - A grayscale effect renders the source in shades of gray. - - \img graphicseffect-grayscale.png - - \sa QGraphicsDropShadowEffect, QGraphicsBlurEffect, QGraphicsPixelizeEffect, - QGraphicsColorizeEffect, QGraphicsOpacityEffect -*/ - -/*! - Constructs a new QGraphicsGrayscale instance. - The \a parent parameter is passed to QGraphicsEffect's constructor. -*/ -QGraphicsGrayscaleEffect::QGraphicsGrayscaleEffect(QObject *parent) - : QGraphicsEffect(*new QGraphicsGrayscaleEffectPrivate, parent) -{ -} - -/*! - Destroys the effect. -*/ -QGraphicsGrayscaleEffect::~QGraphicsGrayscaleEffect() -{ -} - - -/*! - \property QGraphicsGrayscaleEffect::strength - \brief the strength of the effect. - - By default, the strength is 1.0. - A strength 0.0 equals to no effect, while 1.0 means full grayscale. -*/ -qreal QGraphicsGrayscaleEffect::strength() const -{ - Q_D(const QGraphicsGrayscaleEffect); - return d->filter->strength(); -} - -void QGraphicsGrayscaleEffect::setStrength(qreal strength) -{ - Q_D(QGraphicsGrayscaleEffect); - if (qFuzzyCompare(d->filter->strength(), strength)) - return; - - d->filter->setStrength(strength); - d->opaque = !qFuzzyIsNull(strength); - update(); - emit strengthChanged(strength); -} - -/*! \fn void QGraphicsGrayscaleEffect::strengthChanged(qreal strength) - This signal is emitted whenever setStrength() changes the grayscale - strength property. \a strength contains the new strength value of - the grayscale effect. - */ - -/*! - \reimp -*/ -void QGraphicsGrayscaleEffect::draw(QPainter *painter, QGraphicsEffectSource *source) -{ - Q_D(QGraphicsGrayscaleEffect); - - if (!d->opaque) { - 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 QGraphicsColorizeEffect \brief The QGraphicsColorizeEffect class provides a colorize effect. \since 4.6 @@ -559,8 +477,7 @@ void QGraphicsGrayscaleEffect::draw(QPainter *painter, QGraphicsEffectSource *so \img graphicseffect-colorize.png - \sa QGraphicsDropShadowEffect, QGraphicsBlurEffect, QGraphicsPixelizeEffect, - QGraphicsGrayscaleEffect, QGraphicsOpacityEffect + \sa QGraphicsDropShadowEffect, QGraphicsBlurEffect, QGraphicsOpacityEffect */ /*! @@ -655,7 +572,8 @@ void QGraphicsColorizeEffect::draw(QPainter *painter, QGraphicsEffectSource *sou 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); + const QPixmap pixmap = source->pixmap(Qt::LogicalCoordinates, &offset, + QGraphicsEffectSource::NoExpandPadMode); d->filter->draw(painter, offset, pixmap); return; } @@ -669,126 +587,6 @@ void QGraphicsColorizeEffect::draw(QPainter *painter, QGraphicsEffectSource *sou } /*! - \class QGraphicsPixelizeEffect - \brief The QGraphicsPixelizeEffect class provides a pixelize effect. - \since 4.6 - - A pixelize effect renders the source in lower resolution. This effect is - useful for reducing details, like censorship. The resolution can be - modified using the setPixelSize() function. - - By default, the pixel size is 3. - - \img graphicseffect-pixelize.png - - \sa QGraphicsDropShadowEffect, QGraphicsBlurEffect, QGraphicsGrayscaleEffect, - QGraphicsColorizeEffect, QGraphicsOpacityEffect -*/ - -/*! - Constructs a new QGraphicsPixelizeEffect instance. - The \a parent parameter is passed to QGraphicsEffect's constructor. -*/ -QGraphicsPixelizeEffect::QGraphicsPixelizeEffect(QObject *parent) - : QGraphicsEffect(*new QGraphicsPixelizeEffectPrivate, parent) -{ -} - -/*! - Destroys the effect. -*/ -QGraphicsPixelizeEffect::~QGraphicsPixelizeEffect() -{ -} - -/*! - \property QGraphicsPixelizeEffect::pixelSize - \brief the size of a pixel in the effect. - - Setting the pixel size to 2 means two pixels in the source will be used to - represent one pixel. Using a bigger size results in lower resolution. - - By default, the pixel size is 3. -*/ -int QGraphicsPixelizeEffect::pixelSize() const -{ - Q_D(const QGraphicsPixelizeEffect); - return d->pixelSize; -} - -void QGraphicsPixelizeEffect::setPixelSize(int size) -{ - Q_D(QGraphicsPixelizeEffect); - if (d->pixelSize == size) - return; - - d->pixelSize = size; - update(); - emit pixelSizeChanged(size); -} - -/*! - \fn void QGraphicsPixelizeEffect::pixelSizeChanged(int size) - - This signal is emitted whenever the effect's pixel size changes. - The \a size parameter holds the effect's new pixel size. -*/ - -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; - } - } - } -} - -/*! - \reimp -*/ -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 class provides a blur effect. \since 4.6 @@ -802,8 +600,7 @@ void QGraphicsPixelizeEffect::draw(QPainter *painter, QGraphicsEffectSource *sou \img graphicseffect-blur.png - \sa QGraphicsDropShadowEffect, QGraphicsPixelizeEffect, QGraphicsGrayscaleEffect, - QGraphicsColorizeEffect, QGraphicsOpacityEffect + \sa QGraphicsDropShadowEffect, QGraphicsColorizeEffect, QGraphicsOpacityEffect */ /*! @@ -833,16 +630,16 @@ QGraphicsBlurEffect::~QGraphicsBlurEffect() By default, the blur radius is 5 pixels. */ -int QGraphicsBlurEffect::blurRadius() const +qreal QGraphicsBlurEffect::blurRadius() const { Q_D(const QGraphicsBlurEffect); return d->filter->radius(); } -void QGraphicsBlurEffect::setBlurRadius(int radius) +void QGraphicsBlurEffect::setBlurRadius(qreal radius) { Q_D(QGraphicsBlurEffect); - if (d->filter->radius() == radius) + if (qFuzzyCompare(d->filter->radius(), radius)) return; d->filter->setRadius(radius); @@ -851,7 +648,7 @@ void QGraphicsBlurEffect::setBlurRadius(int radius) } /*! - \fn void QGraphicsBlurEffect::blurRadiusChanged(int radius) + \fn void QGraphicsBlurEffect::blurRadiusChanged(qreal radius) This signal is emitted whenever the effect's blur radius changes. The \a radius parameter holds the effect's new blur radius. @@ -937,8 +734,7 @@ void QGraphicsBlurEffect::draw(QPainter *painter, QGraphicsEffectSource *source) \img graphicseffect-drop-shadow.png - \sa QGraphicsBlurEffect, QGraphicsPixelizeEffect, QGraphicsGrayscaleEffect, - QGraphicsColorizeEffect, QGraphicsOpacityEffect + \sa QGraphicsBlurEffect, QGraphicsColorizeEffect, QGraphicsOpacityEffect */ /*! @@ -988,6 +784,8 @@ void QGraphicsDropShadowEffect::setOffset(const QPointF &offset) By default, the horizontal shadow offset is 8 pixels. + + \sa yOffset(), offset() */ @@ -1018,16 +816,16 @@ void QGraphicsDropShadowEffect::setOffset(const QPointF &offset) \sa color(), offset(). */ -int QGraphicsDropShadowEffect::blurRadius() const +qreal QGraphicsDropShadowEffect::blurRadius() const { Q_D(const QGraphicsDropShadowEffect); return d->filter->blurRadius(); } -void QGraphicsDropShadowEffect::setBlurRadius(int blurRadius) +void QGraphicsDropShadowEffect::setBlurRadius(qreal blurRadius) { Q_D(QGraphicsDropShadowEffect); - if (d->filter->blurRadius() == blurRadius) + if (qFuzzyCompare(d->filter->blurRadius(), blurRadius)) return; d->filter->setBlurRadius(blurRadius); @@ -1036,7 +834,7 @@ void QGraphicsDropShadowEffect::setBlurRadius(int blurRadius) } /*! - \fn void QGraphicsDropShadowEffect::blurRadiusChanged(int blurRadius) + \fn void QGraphicsDropShadowEffect::blurRadiusChanged(qreal blurRadius) This signal is emitted whenever the effect's blur radius changes. The \a blurRadius parameter holds the effect's new blur radius. @@ -1117,8 +915,7 @@ void QGraphicsDropShadowEffect::draw(QPainter *painter, QGraphicsEffectSource *s \img graphicseffect-opacity.png - \sa QGraphicsDropShadowEffect, QGraphicsBlurEffect, QGraphicsPixelizeEffect, - QGraphicsGrayscaleEffect, QGraphicsColorizeEffect + \sa QGraphicsDropShadowEffect, QGraphicsBlurEffect, QGraphicsColorizeEffect */ /*! @@ -1242,7 +1039,8 @@ void QGraphicsOpacityEffect::draw(QPainter *painter, QGraphicsEffectSource *sour if (source->isPixmap()) { // No point in drawing in device coordinates (pixmap will be scaled anyways). if (!d->hasOpacityMask) { - const QPixmap pixmap = source->pixmap(Qt::LogicalCoordinates, &offset); + const QPixmap pixmap = source->pixmap(Qt::LogicalCoordinates, &offset, + QGraphicsEffectSource::NoExpandPadMode); painter->drawPixmap(offset, pixmap); } else { QRect srcBrect = source->boundingRect().toAlignedRect(); @@ -1263,7 +1061,8 @@ void QGraphicsOpacityEffect::draw(QPainter *painter, QGraphicsEffectSource *sour } else { // Draw pixmap in device coordinates to avoid pixmap scaling; if (!d->hasOpacityMask) { - const QPixmap pixmap = source->pixmap(Qt::DeviceCoordinates, &offset); + const QPixmap pixmap = source->pixmap(Qt::DeviceCoordinates, &offset, + QGraphicsEffectSource::NoExpandPadMode); painter->setWorldTransform(QTransform()); painter->drawPixmap(offset, pixmap); } else { @@ -1296,234 +1095,6 @@ void QGraphicsOpacityEffect::draw(QPainter *painter, QGraphicsEffectSource *sour painter->restore(); } -/*! - \class QGraphicsBloomEffect - \brief The QGraphicsBloomEffect class provides a bloom/glow effect. - \since 4.6 - - A bloom/glow effect adds fringes of light around bright areas in the source. - - \img graphicseffect-bloom.png - - \sa QGraphicsDropShadowEffect, QGraphicsBlurEffect, QGraphicsPixelizeEffect, - QGraphicsGrayscaleEffect, QGraphicsColorizeEffect -*/ - -/*! - Constructs a new QGraphicsBloomEffect instance. - The \a parent parameter is passed to QGraphicsEffect's constructor. -*/ -QGraphicsBloomEffect::QGraphicsBloomEffect(QObject *parent) - : QGraphicsEffect(*new QGraphicsBloomEffectPrivate, parent) -{ - Q_D(QGraphicsBloomEffect); - for (int i = 0; i < 256; ++i) - d->colorTable[i] = qMin(i + d->brightness, 255); -} - -/*! - Destroys the effect. -*/ -QGraphicsBloomEffect::~QGraphicsBloomEffect() -{ -} - -/*! - \reimp -*/ -QRectF QGraphicsBloomEffect::boundingRectFor(const QRectF &rect) const -{ - Q_D(const QGraphicsBloomEffect); - const qreal delta = d->blurFilter.radius() * 2; - return rect.adjusted(-delta, -delta, delta, delta); -} - -/*! - \property QGraphicsBloomEffect::blurRadius - \brief the blur radius in pixels of the effect. - - Using a smaller radius results in a sharper appearance, whereas a bigger - radius results in a more blurred appearance. - - By default, the blur radius is 5 pixels. - - \sa strength(), brightness() -*/ -int QGraphicsBloomEffect::blurRadius() const -{ - Q_D(const QGraphicsBloomEffect); - return d->blurFilter.radius(); -} - -void QGraphicsBloomEffect::setBlurRadius(int radius) -{ - Q_D(QGraphicsBloomEffect); - if (d->blurFilter.radius() == radius) - return; - - d->blurFilter.setRadius(radius); - updateBoundingRect(); - emit blurRadiusChanged(radius); -} - -/*! - \fn void QGraphicsBloomEffect::blurRadiusChanged(int blurRadius) - - This signal is emitted whenever the effect's blur radius changes. - The \a blurRadius parameter holds the effect's new blur radius. -*/ - -/*! - \property QGraphicsBloomEffect::blurHint - \brief the blur hint of the effect. - - Use the Qt::PerformanceHint hint to say that you want a faster blur, - and the Qt::QualityHint hint to say that you prefer a higher quality blur. - - When animating the blur radius it's recommended to use Qt::PerformanceHint. - - By default, the blur hint is Qt::PerformanceHint. -*/ -Qt::RenderHint QGraphicsBloomEffect::blurHint() const -{ - Q_D(const QGraphicsBloomEffect); - return d->blurFilter.blurHint(); -} - -void QGraphicsBloomEffect::setBlurHint(Qt::RenderHint hint) -{ - Q_D(QGraphicsBloomEffect); - if (d->blurFilter.blurHint() == hint) - return; - - d->blurFilter.setBlurHint(hint); - emit blurHintChanged(hint); -} - -/*! - \fn void QGraphicsBloomEffect::blurHintChanged(Qt::RenderHint hint) - - This signal is emitted whenever the effect's blur hint changes. - The \a hint parameter holds the effect's new blur hint. -*/ - -/*! - \property QGraphicsBloomEffect::brightness - \brief the brightness of the glow. - - The value should be in the range of 0 to 255, where 0 is dark - and 255 is bright. - - By default, the brightness is 70. - - \sa strength(), blurRadius() -*/ -int QGraphicsBloomEffect::brightness() const -{ - Q_D(const QGraphicsBloomEffect); - return d->brightness; -} - -void QGraphicsBloomEffect::setBrightness(int brightness) -{ - Q_D(QGraphicsBloomEffect); - brightness = qBound(0, brightness, 255); - if (d->brightness == brightness) - return; - - d->brightness = brightness; - for (int i = 0; i < 256; ++i) - d->colorTable[i] = qMin(i + brightness, 255); - - update(); - emit brightnessChanged(brightness); -} - -/*! - \fn void QGraphicsBloomEffect::brightnessChanged(int brightness) - - This signal is emitted whenever the effect's brightness changes. - The \a brightness parameter holds the effect's new brightness. -*/ - -/*! - \property QGraphicsBloomEffect::strength - \brief the strength of the effect. - - A strength 0.0 equals to no effect, while 1.0 means maximum glow. - - By default, the strength is 0.7. -*/ -qreal QGraphicsBloomEffect::strength() const -{ - Q_D(const QGraphicsBloomEffect); - return d->strength; -} - -void QGraphicsBloomEffect::setStrength(qreal strength) -{ - Q_D(QGraphicsBloomEffect); - strength = qBound(qreal(0.0), strength, qreal(1.0)); - if (qFuzzyCompare(d->strength, strength)) - return; - - d->strength = strength; - update(); - emit strengthChanged(strength); -} - -/*! - \fn void QGraphicsBloomEffect::strengthChanged(qreal strength) - - This signal is emitted whenever the effect's strength changes. - The \a strength parameter holds the effect's new strength. -*/ - -extern QPixmap qt_toRasterPixmap(const QPixmap &pixmap); - -/*! - \reimp -*/ -void QGraphicsBloomEffect::draw(QPainter *painter, QGraphicsEffectSource *source) -{ - Q_D(QGraphicsBloomEffect); - if (d->strength < 0.001) { - source->draw(painter); - return; - } - - QPoint offset; - QPixmap pixmap = qt_toRasterPixmap(source->pixmap(Qt::DeviceCoordinates, &offset)); - - // Blur. - QImage overlay(pixmap.size(), QImage::Format_ARGB32_Premultiplied); - overlay.fill(0); - - QPainter blurPainter(&overlay); - d->blurFilter.draw(&blurPainter, QPointF(), pixmap); - blurPainter.end(); - - // Brighten. - const int numBits = overlay.width() * overlay.height(); - QRgb *bits = reinterpret_cast<QRgb *>(overlay.bits()); - for (int i = 0; i < numBits; ++i) { - const QRgb pixel = INV_PREMUL(bits[i]); - bits[i] = PREMUL(qRgba(d->colorTable[qRed(pixel)], d->colorTable[qGreen(pixel)], - d->colorTable[qBlue(pixel)], qAlpha(pixel))); - } - - // Composite. - QPainter compPainter(&pixmap); - compPainter.setCompositionMode(QPainter::CompositionMode_Overlay); - compPainter.setOpacity(d->strength); - compPainter.drawImage(0, 0, overlay); - compPainter.end(); - - QTransform restoreTransform = painter->worldTransform(); - painter->setWorldTransform(QTransform()); - painter->drawPixmap(offset, pixmap); - painter->setWorldTransform(restoreTransform); -} QT_END_NAMESPACE |