diff options
Diffstat (limited to 'src/gui/graphicsview/qgraphicseffect.cpp')
-rw-r--r-- | src/gui/graphicsview/qgraphicseffect.cpp | 234 |
1 files changed, 139 insertions, 95 deletions
diff --git a/src/gui/graphicsview/qgraphicseffect.cpp b/src/gui/graphicsview/qgraphicseffect.cpp index c173d1b..8d2c416 100644 --- a/src/gui/graphicsview/qgraphicseffect.cpp +++ b/src/gui/graphicsview/qgraphicseffect.cpp @@ -104,83 +104,90 @@ QGraphicsEffect::QGraphicsEffect() : QObject(*new QGraphicsEffectPrivate, 0) +{} + +/*! + \internal +*/ +QGraphicsEffect::QGraphicsEffect(QGraphicsEffectPrivate &dd) + : QObject(dd, 0) +{} + +QGraphicsEffect::~QGraphicsEffect() { Q_D(QGraphicsEffect); - d->parentItem = 0; + d->setGraphicsEffectSource(0); } -QGraphicsEffect::~QGraphicsEffect() +QRectF QGraphicsEffect::boundingRect() const { + return sourceBoundingRect(); } -QRectF QGraphicsEffect::boundingRectFor(const QGraphicsItem *item) +QRectF QGraphicsEffect::sourceBoundingRect() const { - // default is to give the item's bounding rect - // do NOT call item->effectiveBoundRect() because - // that function will call this one (infinite loop) - return item->boundingRect(); + Q_D(const QGraphicsEffect); + if (d->source) + return d->source->boundingRect(); + return QRectF(); } -/*! \internal -*/ -QGraphicsEffect::QGraphicsEffect(QGraphicsEffectPrivate &dd) - : QObject(dd, 0) +void QGraphicsEffect::drawSource(QPainter *painter) { Q_D(QGraphicsEffect); - d->parentItem = 0; + if (d->source) + d->source->draw(painter); } -// this helper function is only for subclasses of QGraphicsEffect -// the implementation is trivial, but this allows us to keep -// QGraphicsScene::drawItem() as a protected function -// (since QGraphicsEffect is a friend of QGraphicsScene) -QPixmap* QGraphicsEffect::drawItemOnPixmap(QPainter *painter, QGraphicsItem *item, - const QStyleOptionGraphicsItem *option, QWidget *widget, int flags) +bool QGraphicsEffect::drawSourceIntoPixmap(QPixmap *pixmap, const QTransform &itemToPixmapTransform) { - if (!item->scene()) - return 0; - return item->scene()->drawItemOnPixmap(painter, item, option, widget, flags); + Q_D(QGraphicsEffect); + if (d->source) + return d->source->drawIntoPixmap(pixmap, itemToPixmapTransform); + return false; } QGraphicsGrayscaleEffect::QGraphicsGrayscaleEffect() : QGraphicsEffect(*new QGraphicsGrayscaleEffectPrivate) -{ -} +{} QGraphicsGrayscaleEffect::~QGraphicsGrayscaleEffect() -{ -} +{} -void QGraphicsGrayscaleEffect::drawItem(QGraphicsItem *item, QPainter *painter, - const QStyleOptionGraphicsItem *option, QWidget *widget) +void QGraphicsGrayscaleEffect::draw(QPainter *painter) { Q_D(QGraphicsGrayscaleEffect); + if (!d->source) + return; // Find the item's bounds in device coordinates. - QRectF deviceBounds = painter->worldTransform().mapRect(item->boundingRect()); + QTransform itemToPixmapTransform(painter->worldTransform()); + QRectF deviceBounds = itemToPixmapTransform.mapRect(d->source->boundingRect()); QRect deviceRect = deviceBounds.toRect().adjusted(-1, -1, 1, 1); if (deviceRect.isEmpty()) return; - QPixmap *pixmap = QGraphicsEffect::drawItemOnPixmap(painter, item, option, widget, 0); - if (!pixmap) + if (deviceRect.x() != 0 || deviceRect.y() != 0) + itemToPixmapTransform *= QTransform::fromTranslate(-deviceRect.x(), -deviceRect.y()); + + QPixmap pixmap(deviceRect.size()); + if (!d->source->drawIntoPixmap(&pixmap, itemToPixmapTransform)) return; // Draw the pixmap with the filter using an untransformed painter. QTransform restoreTransform = painter->worldTransform(); painter->setWorldTransform(QTransform()); - d->filter->draw(painter, deviceRect.topLeft(), *pixmap, pixmap->rect()); + d->filter->draw(painter, deviceRect.topLeft(), pixmap, pixmap.rect()); painter->setWorldTransform(restoreTransform); + } QGraphicsColorizeEffect::QGraphicsColorizeEffect() : QGraphicsEffect(*new QGraphicsColorizeEffectPrivate) -{ -} +{} QGraphicsColorizeEffect::~QGraphicsColorizeEffect() -{ -} +{} QColor QGraphicsColorizeEffect::color() const { @@ -194,25 +201,30 @@ void QGraphicsColorizeEffect::setColor(const QColor &c) d->filter->setColor(c); } -void QGraphicsColorizeEffect::drawItem(QGraphicsItem *item, QPainter *painter, - const QStyleOptionGraphicsItem *option, QWidget *widget) +void QGraphicsColorizeEffect::draw(QPainter *painter) { Q_D(QGraphicsColorizeEffect); + if (!d->source) + return; // Find the item's bounds in device coordinates. - QRectF deviceBounds = painter->worldTransform().mapRect(item->boundingRect()); + QTransform itemToPixmapTransform(painter->worldTransform()); + QRectF deviceBounds = itemToPixmapTransform.mapRect(d->source->boundingRect()); QRect deviceRect = deviceBounds.toRect().adjusted(-1, -1, 1, 1); if (deviceRect.isEmpty()) return; - QPixmap *pixmap = QGraphicsEffect::drawItemOnPixmap(painter, item, option, widget, 0); - if (!pixmap) + if (deviceRect.x() != 0 || deviceRect.y() != 0) + itemToPixmapTransform *= QTransform::fromTranslate(-deviceRect.x(), -deviceRect.y()); + + QPixmap pixmap(deviceRect.size()); + if (!d->source->drawIntoPixmap(&pixmap, itemToPixmapTransform)) return; // Draw the pixmap with the filter using an untransformed painter. QTransform restoreTransform = painter->worldTransform(); painter->setWorldTransform(QTransform()); - d->filter->draw(painter, deviceRect.topLeft(), *pixmap, pixmap->rect()); + d->filter->draw(painter, deviceRect.topLeft(), pixmap, pixmap.rect()); painter->setWorldTransform(restoreTransform); } @@ -237,23 +249,28 @@ void QGraphicsPixelizeEffect::setPixelSize(int size) d->pixelSize = size; } -void QGraphicsPixelizeEffect::drawItem(QGraphicsItem *item, QPainter *painter, - const QStyleOptionGraphicsItem *option, QWidget *widget) +void QGraphicsPixelizeEffect::draw(QPainter *painter) { Q_D(QGraphicsPixelizeEffect); + if (!d->source) + return; // Find the item's bounds in device coordinates. - QRectF deviceBounds = painter->worldTransform().mapRect(item->boundingRect()); + QTransform itemToPixmapTransform(painter->worldTransform()); + QRectF deviceBounds = itemToPixmapTransform.mapRect(d->source->boundingRect()); QRect deviceRect = deviceBounds.toRect().adjusted(-1, -1, 1, 1); if (deviceRect.isEmpty()) return; - QPixmap *pixmap = QGraphicsEffect::drawItemOnPixmap(painter, item, option, widget, 0); - if (!pixmap) + if (deviceRect.x() != 0 || deviceRect.y() != 0) + itemToPixmapTransform *= QTransform::fromTranslate(-deviceRect.x(), -deviceRect.y()); + + QPixmap pixmap(deviceRect.size()); + if (!d->source->drawIntoPixmap(&pixmap)) return; // pixelize routine - QImage img = pixmap->toImage().convertToFormat(QImage::Format_ARGB32); + QImage img = pixmap.toImage().convertToFormat(QImage::Format_ARGB32); if (d->pixelSize > 0) { int width = img.width(); int height = img.height(); @@ -365,31 +382,42 @@ void QGraphicsBlurEffect::setBlurRadius(int radius) d->filter->setBlurRadius(radius); } -QRectF QGraphicsBlurEffect::boundingRectFor(const QGraphicsItem *item) +QRectF QGraphicsBlurEffect::boundingRect() const { Q_D(const QGraphicsBlurEffect); - return d->filter->boundingRectFor(item->boundingRect()); + if (d->source) + return d->filter->boundingRectFor(d->source->boundingRect()); + return QRectF(); } -void QGraphicsBlurEffect::drawItem(QGraphicsItem *item, QPainter *painter, - const QStyleOptionGraphicsItem *option, QWidget *widget) +void QGraphicsBlurEffect::draw(QPainter *painter) { Q_D(QGraphicsBlurEffect); + if (!d->source) + return; // Find the item's bounds in device coordinates. - QRectF deviceBounds = painter->worldTransform().mapRect(item->boundingRect()); + QTransform itemToPixmapTransform(painter->worldTransform()); + QRectF deviceBounds = itemToPixmapTransform.mapRect(d->source->boundingRect()); QRect deviceRect = deviceBounds.toRect().adjusted(-1, -1, 1, 1); if (deviceRect.isEmpty()) return; - QPixmap *pixmap = QGraphicsEffect::drawItemOnPixmap(painter, item, option, widget, 0); - if (!pixmap) + // ### Potentially big rect; must be clipped to the viewport rect. + const qreal delta = d->blurRadius * 3; + const QRect effectRect = deviceBounds.adjusted(-delta, -delta, delta, delta) + .toRect().adjusted(-1, -1, 1, 1); + if (effectRect.x() != 0 || effectRect.y() != 0) + itemToPixmapTransform *= QTransform::fromTranslate(-effectRect.x(), -effectRect.y()); + + QPixmap pixmap(effectRect.size()); + if (!d->source->drawIntoPixmap(&pixmap, itemToPixmapTransform)) return; // Draw the pixmap with the filter using an untransformed painter. QTransform restoreTransform = painter->worldTransform(); painter->setWorldTransform(QTransform()); - d->filter->draw(painter, deviceRect.topLeft(), *pixmap, pixmap->rect()); + d->filter->draw(painter, deviceRect.topLeft(), pixmap, pixmap.rect()); painter->setWorldTransform(restoreTransform); } @@ -426,13 +454,13 @@ void QGraphicsBloomEffect::setOpacity(qreal alpha) d->opacity = alpha; } -QRectF QGraphicsBloomEffect::boundingRectFor(const QGraphicsItem *item) +QRectF QGraphicsBloomEffect::boundingRect() const { - Q_D(QGraphicsBloomEffect); + Q_D(const QGraphicsBloomEffect); + if (!d->source) + return QRectF(); qreal delta = d->blurRadius * 3; - QRectF blurRect = item->boundingRect(); - blurRect.adjust(-delta, -delta, delta, delta); - return blurRect; + return d->source->boundingRect().adjusted(-delta, -delta, delta, delta); } // Change brightness (positive integer) of each pixel @@ -466,24 +494,29 @@ static QImage composited(const QImage& img1, const QImage& img2, qreal opacity, return result; } -void QGraphicsBloomEffect::drawItem(QGraphicsItem *item, QPainter *painter, - const QStyleOptionGraphicsItem *option, QWidget *widget) +void QGraphicsBloomEffect::draw(QPainter *painter) { Q_D(QGraphicsBloomEffect); + if (!d->source) + return; // Find the item's bounds in device coordinates. - QRectF deviceBounds = painter->worldTransform().mapRect(item->boundingRect()); + QTransform itemToPixmapTransform(painter->worldTransform()); + QRectF deviceBounds = itemToPixmapTransform.mapRect(d->source->boundingRect()); QRect deviceRect = deviceBounds.toRect().adjusted(-1, -1, 1, 1); if (deviceRect.isEmpty()) return; - QPixmap *pixmap = QGraphicsEffect::drawItemOnPixmap(painter, item, option, widget, 0); - if (!pixmap) + if (deviceRect.x() != 0 || deviceRect.y() != 0) + itemToPixmapTransform *= QTransform::fromTranslate(-deviceRect.x(), -deviceRect.y()); + + QPixmap pixmap(deviceRect.size()); + if (!d->source->drawIntoPixmap(&pixmap, itemToPixmapTransform)) return; // bloom routine int radius = d->blurRadius; - QImage img = pixmap->toImage().convertToFormat(QImage::Format_ARGB32_Premultiplied); + QImage img = pixmap.toImage().convertToFormat(QImage::Format_ARGB32_Premultiplied); QImage overlay = blurred(img, img.rect(), radius); overlay = brightened(overlay, 70); img = composited(img, overlay, d->opacity, QPainter::CompositionMode_Overlay); @@ -540,31 +573,35 @@ void QGraphicsFrameEffect::setFrameOpacity(qreal opacity) d->alpha = opacity; } -QRectF QGraphicsFrameEffect::boundingRectFor(const QGraphicsItem *item) +QRectF QGraphicsFrameEffect::boundingRect() const { - Q_D(QGraphicsFrameEffect); - QRectF frameRect = item->boundingRect(); - frameRect.adjust(-d->width, -d->width, d->width, d->width); - return frameRect; + Q_D(const QGraphicsFrameEffect); + if (!d->source) + return QRectF(); + return d->source->boundingRect().adjusted(-d->width, -d->width, d->width, d->width); } -void QGraphicsFrameEffect::drawItem(QGraphicsItem *item, QPainter *painter, - const QStyleOptionGraphicsItem *option, QWidget *widget) +void QGraphicsFrameEffect::draw(QPainter *painter) { Q_D(QGraphicsFrameEffect); + if (!d->source) + return; // Find the item's bounds in device coordinates. - QRectF deviceBounds = painter->worldTransform().mapRect(item->boundingRect()); - QRect deviceRect = deviceBounds.toRect().adjusted(-1, -1, 1, 1); - if (deviceRect.isEmpty()) + QTransform itemToPixmapTransform(painter->worldTransform()); + QRectF deviceBounds = itemToPixmapTransform.mapRect(d->source->boundingRect()); + if (deviceBounds.isEmpty()) return; - QPixmap *pixmap = QGraphicsEffect::drawItemOnPixmap(painter, item, option, widget, 0); - if (!pixmap) - return; + QRect frameRect = deviceBounds.adjusted(-d->width, -d->width, d->width, d->width) + .toRect().adjusted(-1, -1, 1, 1); + + if (frameRect.x() != 0 || frameRect.y() != 0) + itemToPixmapTransform *= QTransform::fromTranslate(-frameRect.x(), -frameRect.y()); - QRectF frameRect = deviceBounds; - frameRect.adjust(-d->width, -d->width, d->width, d->width); + QPixmap pixmap(frameRect.size()); + if (!d->source->drawIntoPixmap(&pixmap, itemToPixmapTransform)) + return; painter->save(); painter->setWorldTransform(QTransform()); @@ -576,7 +613,7 @@ void QGraphicsFrameEffect::drawItem(QGraphicsItem *item, QPainter *painter, painter->drawRoundedRect(frameRect, 20, 20, Qt::RelativeSize); painter->restore(); - painter->drawPixmap(frameRect.topLeft(), *pixmap); + painter->drawPixmap(frameRect.topLeft(), pixmap); painter->restore(); } @@ -626,25 +663,30 @@ void QGraphicsShadowEffect::setOpacity(qreal opacity) d->alpha = opacity; } -QRectF QGraphicsShadowEffect::boundingRectFor(const QGraphicsItem *item) +QRectF QGraphicsShadowEffect::boundingRect() const { - Q_D(QGraphicsShadowEffect); - QRectF shadowRect = item->boundingRect(); + Q_D(const QGraphicsShadowEffect); + if (!d->source) + return QRectF(); + const QRectF srcBrect = d->source->boundingRect(); + QRectF shadowRect = srcBrect; shadowRect.adjust(d->offset.x(), d->offset.y(), d->offset.x(), d->offset.y()); QRectF blurRect = shadowRect; qreal delta = d->radius * 3; blurRect.adjust(-delta, -delta, delta, delta); - QRectF totalRect = blurRect.united(item->boundingRect()); + QRectF totalRect = blurRect.united(srcBrect); return totalRect; } -void QGraphicsShadowEffect::drawItem(QGraphicsItem *item, QPainter *painter, - const QStyleOptionGraphicsItem *option, QWidget *widget) +void QGraphicsShadowEffect::draw(QPainter *painter) { Q_D(QGraphicsShadowEffect); + if (!d->source) + return; // Find the item's bounds in device coordinates. - QRectF deviceBounds = painter->worldTransform().mapRect(item->boundingRect()); + QTransform itemToPixmapTransform(painter->worldTransform()); + QRectF deviceBounds = itemToPixmapTransform.mapRect(d->source->boundingRect()); QRect deviceRect = deviceBounds.toRect().adjusted(-1, -1, 1, 1); if (deviceRect.isEmpty()) return; @@ -654,13 +696,16 @@ void QGraphicsShadowEffect::drawItem(QGraphicsItem *item, QPainter *painter, QRectF blurRect = shadowRect; qreal delta = d->radius * 3; blurRect.adjust(-delta, -delta, delta, delta); - QRectF totalRect = blurRect.united(deviceRect); + QRect totalRect = blurRect.united(deviceRect).toRect().adjusted(-1, -1, 1, 1); - QPixmap *pixmap = QGraphicsEffect::drawItemOnPixmap(painter, item, option, widget, 0); - if (!pixmap) + if (totalRect.x() != 0 || totalRect.y() != 0) + itemToPixmapTransform *= QTransform::fromTranslate(-totalRect.x(), -totalRect.y()); + + QPixmap pixmap(totalRect.size()); + if (!d->source->drawIntoPixmap(&pixmap, itemToPixmapTransform)) return; - QImage img = pixmap->toImage(); + QImage img = pixmap.toImage(); QImage shadowImage(img.size(), QImage::Format_ARGB32); shadowImage.fill(qRgba(0, 0, 0, d->alpha * 255)); shadowImage.setAlphaChannel(img.alphaChannel()); @@ -682,10 +727,9 @@ void QGraphicsShadowEffect::drawItem(QGraphicsItem *item, QPainter *painter, qreal itemx = qMin(blurRect.x(), deviceBounds.x()); qreal itemy = qMin(blurRect.y(), deviceBounds.y()); - painter->drawPixmap(itemx, itemy, *pixmap); + painter->drawPixmap(itemx, itemy, pixmap); painter->setWorldTransform(restoreTransform); } - #endif |