diff options
Diffstat (limited to 'src/plugins/platforms/xcb')
-rw-r--r-- | src/plugins/platforms/xcb/qxcbbackingstore.cpp | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/src/plugins/platforms/xcb/qxcbbackingstore.cpp b/src/plugins/platforms/xcb/qxcbbackingstore.cpp index 4ef2d53343..6fec282f29 100644 --- a/src/plugins/platforms/xcb/qxcbbackingstore.cpp +++ b/src/plugins/platforms/xcb/qxcbbackingstore.cpp @@ -479,13 +479,14 @@ bool QXcbBackingStoreImage::scroll(const QRegion &area, int dx, int dy) const QRect bounds(QPoint(), size()); const QRegion scrollArea(area & bounds); const QPoint delta(dx, dy); + const QRegion destinationRegion = scrollArea.translated(delta).intersected(bounds); if (m_clientSideScroll) { if (m_qimage.isNull()) return false; if (hasShm()) - preparePaint(scrollArea); + preparePaint(destinationRegion); for (const QRect &rect : scrollArea) qt_scrollRectInImage(m_qimage, rect, delta); @@ -509,7 +510,8 @@ bool QXcbBackingStoreImage::scroll(const QRegion &area, int dx, int dy) } } - m_scrolledRegion |= scrollArea.translated(delta).intersected(bounds); + m_scrolledRegion |= destinationRegion; + if (hasShm()) { m_pendingFlush -= scrollArea; m_pendingFlush -= m_scrolledRegion; |