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Diffstat (limited to 'src/plugins/platforms/cocoa/qcocoabackingstore.mm')
-rw-r--r-- | src/plugins/platforms/cocoa/qcocoabackingstore.mm | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/src/plugins/platforms/cocoa/qcocoabackingstore.mm b/src/plugins/platforms/cocoa/qcocoabackingstore.mm index cddb960197..6a4f7ed8ee 100644 --- a/src/plugins/platforms/cocoa/qcocoabackingstore.mm +++ b/src/plugins/platforms/cocoa/qcocoabackingstore.mm @@ -96,6 +96,18 @@ bool QCocoaBackingStore::scroll(const QRegion &area, int dx, int dy) return true; } +void QCocoaBackingStore::beginPaint(const QRegion ®ion) +{ + if (m_qImage.hasAlphaChannel()) { + QPainter p(&m_qImage); + p.setCompositionMode(QPainter::CompositionMode_Source); + const QVector<QRect> rects = region.rects(); + const QColor blank = Qt::transparent; + for (QVector<QRect>::const_iterator it = rects.begin(), end = rects.end(); it != end; ++it) + p.fillRect(*it, blank); + } +} + qreal QCocoaBackingStore::getBackingStoreDevicePixelRatio() { return m_qImage.devicePixelRatio(); |