diff options
| -rw-r--r-- | src/gui/graphicsview/qgraphicsitem.cpp | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/src/gui/graphicsview/qgraphicsitem.cpp b/src/gui/graphicsview/qgraphicsitem.cpp index 36d21a6..d284a29 100644 --- a/src/gui/graphicsview/qgraphicsitem.cpp +++ b/src/gui/graphicsview/qgraphicsitem.cpp @@ -5687,11 +5687,13 @@ void QGraphicsItem::scroll(qreal dx, qreal dy, const QRectF &rect) return; } + // Find pixmap in cache, then remove to avoid deep copy when modifying.s QPixmap cachedPixmap; if (!QPixmapCache::find(cache->key, &cachedPixmap)) { update(rect); return; } + QPixmapCache::remove(cache->key); QRegion exposed; const bool scrollEntirePixmap = rect.isNull(); @@ -5707,7 +5709,8 @@ void QGraphicsItem::scroll(qreal dx, qreal dy, const QRectF &rect) cachedPixmap.scroll(dx, dy, scrollRect.translated(-cache->boundingRect.topLeft()), &exposed); } - QPixmapCache::replace(cache->key, cachedPixmap); + // Reinsert into cache. + cache->key = QPixmapCache::insert(cachedPixmap); // Translate the existing expose. for (int i = 0; i < cache->exposed.size(); ++i) { |