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| author | Bjoern Erik Nilsen <bjorn.nilsen@nokia.com> | 2009-02-27 17:10:08 (GMT) |
|---|---|---|
| committer | Andreas Aardal Hanssen <andreas.aardal.hanssen@nokia.com> | 2009-04-06 11:49:36 (GMT) |
| commit | b4456f8775c36bcb2ceef9ca1a00c7765f1d2735 (patch) | |
| tree | cbbf47758983c276e0310b7f1f7be80524a2d660 /src/gui/graphicsview/qgraphicsscene.cpp | |
| parent | eda77b7c410a59d1b77c263994679452613d9d0b (diff) | |
| download | Qt-b4456f8775c36bcb2ceef9ca1a00c7765f1d2735.zip Qt-b4456f8775c36bcb2ceef9ca1a00c7765f1d2735.tar.gz Qt-b4456f8775c36bcb2ceef9ca1a00c7765f1d2735.tar.bz2 | |
Fixes: Get rid of a gazillion calls to QTransform::operator*=.
Details: Be a little bit smarter before doing *= :)
Diffstat (limited to 'src/gui/graphicsview/qgraphicsscene.cpp')
| -rw-r--r-- | src/gui/graphicsview/qgraphicsscene.cpp | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/src/gui/graphicsview/qgraphicsscene.cpp b/src/gui/graphicsview/qgraphicsscene.cpp index 9b06945..b509507 100644 --- a/src/gui/graphicsview/qgraphicsscene.cpp +++ b/src/gui/graphicsview/qgraphicsscene.cpp @@ -4772,8 +4772,9 @@ void QGraphicsScenePrivate::drawItemHelper(QGraphicsItem *item, QPainter *painte if (itemCache->allExposed || !itemCache->exposed.isEmpty() || !scrollExposure.isEmpty()) { // Construct an item-to-pixmap transform. QPointF p = deviceRect.topLeft(); - QTransform itemToPixmap = QTransform::fromTranslate(-p.x(), -p.y()); - itemToPixmap = painter->worldTransform() * itemToPixmap; + QTransform itemToPixmap = painter->worldTransform(); + if (!p.isNull()) + itemToPixmap *= QTransform::fromTranslate(-p.x(), -p.y()); // Map the item's logical expose to pixmap coordinates. QRegion pixmapExposed = scrollExposure; |