Fixes QGraphicsEffect offset bugs.

3 files changed, 6 insertions, 5 deletions

diff --git a/src/gui/graphicsview/qgraphicseffect.cpp b/src/gui/graphicsview/qgraphicseffect.cpp
index 9196ee0..37e3d8c 100644
--- a/src/gui/graphicsview/qgraphicseffect.cpp
+++ b/src/gui/graphicsview/qgraphicseffect.cpp
@@ -543,7 +543,6 @@ void QGraphicsBloomEffect::draw(QPainter *painter, QGraphicsEffectSource *source
 
     QPoint offset;
     const int radius = d->blurRadius;
-    const int delta = radius * 3;
 
     if (source->isPixmap()) {
         // No point in drawing in device coordinates (pixmap will be scaled anyways).
@@ -555,7 +554,7 @@ void QGraphicsBloomEffect::draw(QPainter *painter, QGraphicsEffectSource *source
         overlay = brightened(overlay, 70);
         img = composited(img, overlay, d->opacity, QPainter::CompositionMode_Overlay);
 
-        painter->drawImage(offset - QPoint(delta, delta), img);
+        painter->drawImage(offset, img);
         return;
     }
 
@@ -571,7 +570,7 @@ void QGraphicsBloomEffect::draw(QPainter *painter, QGraphicsEffectSource *source
     // Draw using an untransformed painter.
     QTransform restoreTransform = painter->worldTransform();
     painter->setWorldTransform(QTransform());
-    painter->drawImage(offset - QPoint(radius * 3, radius * 3), img);
+    painter->drawImage(offset, img);
     painter->setWorldTransform(restoreTransform);
 }
 
diff --git a/src/gui/graphicsview/qgraphicsitem.cpp b/src/gui/graphicsview/qgraphicsitem.cpp
index 9700965..991f2b2 100644
--- a/src/gui/graphicsview/qgraphicsitem.cpp
+++ b/src/gui/graphicsview/qgraphicsitem.cpp
@@ -10054,7 +10054,7 @@ QPixmap QGraphicsItemEffectSourcePrivate::pixmap(Qt::CoordinateSystem system, QP
     const QRectF sourceRect = boundingRect(system);
     QRect effectRect = item->graphicsEffect()->boundingRectFor(sourceRect).toAlignedRect();
     if (offset)
-        *offset = sourceRect.toAlignedRect().topLeft();
+        *offset = effectRect.topLeft();
 
     if (deviceCoordinates) {
         // Clip to viewport rect.
diff --git a/src/gui/image/qpixmapfilter.cpp b/src/gui/image/qpixmapfilter.cpp
index b7b3733..579d057 100644
--- a/src/gui/image/qpixmapfilter.cpp
+++ b/src/gui/image/qpixmapfilter.cpp
@@ -586,7 +586,9 @@ Qt::TransformationMode QPixmapBlurFilter::quality() const
 */
 QRectF QPixmapBlurFilter::boundingRectFor(const QRectF &rect) const
 {
-    return rect;
+    Q_D(const QPixmapBlurFilter);
+    const qreal delta = d->radius * 2;
+    return rect.adjusted(-delta, -delta, delta, delta);
 }
 
 // Blur the image according to the blur radius