diff options
| -rw-r--r-- | src/plugins/platforms/xcb/qxcbbackingstore.cpp | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/src/plugins/platforms/xcb/qxcbbackingstore.cpp b/src/plugins/platforms/xcb/qxcbbackingstore.cpp index b4993bfd17..796ca24265 100644 --- a/src/plugins/platforms/xcb/qxcbbackingstore.cpp +++ b/src/plugins/platforms/xcb/qxcbbackingstore.cpp @@ -493,10 +493,13 @@ bool QXcbBackingStoreImage::scroll(const QRegion &area, int dx, int dy) } else { ensureGC(m_xcb_pixmap); - if (hasShm()) - shmPutImage(m_xcb_pixmap, m_pendingFlush.intersected(scrollArea)); - else + if (hasShm()) { + QRegion partialFlushRegion = m_pendingFlush.intersected(scrollArea); + shmPutImage(m_xcb_pixmap, partialFlushRegion); + m_pendingFlush -= partialFlushRegion; + } else { flushPixmap(scrollArea); + } for (const QRect &src : scrollArea) { const QRect dst = src.translated(delta).intersected(bounds); @@ -508,15 +511,13 @@ bool QXcbBackingStoreImage::scroll(const QRegion &area, int dx, int dy) dst.x(), dst.y(), dst.width(), dst.height()); } + + if (hasShm()) + m_pendingFlush -= destinationRegion; } m_scrolledRegion |= destinationRegion; - if (hasShm()) { - m_pendingFlush -= scrollArea; - m_pendingFlush -= m_scrolledRegion; - } - return true; } |