--- a/src/gui/graphicsview/qgraphicsscene.cpp Fri Apr 16 15:50:13 2010 +0300
+++ b/src/gui/graphicsview/qgraphicsscene.cpp Mon May 03 13:17:34 2010 +0300
@@ -4285,6 +4285,7 @@
if (!subPix.isNull()) {
// Blit the subpixmap into the main pixmap.
pixmapPainter.begin(pix);
+ pixmapPainter.setCompositionMode(QPainter::CompositionMode_Source);
pixmapPainter.setClipRegion(pixmapExposed);
pixmapPainter.drawPixmap(br.topLeft(), subPix);
pixmapPainter.end();
@@ -4450,6 +4451,8 @@
}
// Create or reuse offscreen pixmap, possibly scroll/blit from the old one.
+ // If the world transform is rotated we always recreate the cache to avoid
+ // wrong blending.
bool pixModified = false;
QGraphicsItemCache::DeviceData *deviceData = &itemCache->deviceData[widget];
bool invertable = true;
@@ -4457,7 +4460,9 @@
if (invertable)
diff *= painter->worldTransform();
deviceData->lastTransform = painter->worldTransform();
- if (!invertable || diff.type() > QTransform::TxTranslate) {
+ if (!invertable
+ || diff.type() > QTransform::TxTranslate
+ || painter->worldTransform().type() > QTransform::TxScale) {
pixModified = true;
itemCache->allExposed = true;
itemCache->exposed.clear();
@@ -4714,31 +4719,18 @@
if (sourced->currentCachedSystem() != Qt::LogicalCoordinates
&& sourced->lastEffectTransform != painter->worldTransform())
{
- bool unclipped = false;
if (sourced->lastEffectTransform.type() <= QTransform::TxTranslate
&& painter->worldTransform().type() <= QTransform::TxTranslate)
{
- QRectF itemRect = item->boundingRect();
- if (!item->d_ptr->children.isEmpty())
- itemRect |= item->childrenBoundingRect();
-
- QRectF oldSourceRect = sourced->lastEffectTransform.mapRect(itemRect);
- QRectF newSourceRect = painter->worldTransform().mapRect(itemRect);
-
- QRect oldEffectRect = sourced->paddedEffectRect(sourced->currentCachedSystem(), sourced->currentCachedMode(), oldSourceRect);
- QRect newEffectRect = sourced->paddedEffectRect(sourced->currentCachedSystem(), sourced->currentCachedMode(), newSourceRect);
-
- QRect deviceRect(0, 0, painter->device()->width(), painter->device()->height());
- if (deviceRect.contains(oldEffectRect) && deviceRect.contains(newEffectRect)) {
- sourced->setCachedOffset(newEffectRect.topLeft());
- unclipped = true;
- }
+ QRectF sourceRect = sourced->boundingRect(Qt::DeviceCoordinates);
+ QRect effectRect = sourced->paddedEffectRect(Qt::DeviceCoordinates, sourced->currentCachedMode(), sourceRect);
+
+ sourced->setCachedOffset(effectRect.topLeft());
+ } else {
+ sourced->invalidateCache(QGraphicsEffectSourcePrivate::TransformChanged);
}
sourced->lastEffectTransform = painter->worldTransform();
-
- if (!unclipped)
- sourced->invalidateCache(QGraphicsEffectSourcePrivate::TransformChanged);
}
item->d_ptr->graphicsEffect->draw(painter);