diff options
Diffstat (limited to 'src/widgets/kernel/qwidgetbackingstore.cpp')
| -rw-r--r-- | src/widgets/kernel/qwidgetbackingstore.cpp | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/widgets/kernel/qwidgetbackingstore.cpp b/src/widgets/kernel/qwidgetbackingstore.cpp index 049ed248de..5d13fb926b 100644 --- a/src/widgets/kernel/qwidgetbackingstore.cpp +++ b/src/widgets/kernel/qwidgetbackingstore.cpp @@ -1211,10 +1211,20 @@ void QWidgetBackingStore::doSync() // We know for sure that the widget isn't overlapped if 'isMoved' is true. if (!wd->isMoved) wd->subtractOpaqueSiblings(wd->dirty, &hasDirtySiblingsAbove); + + // Make a copy of the widget's dirty region, to restore it in case there is an opaque + // render-to-texture child that completely covers the widget, because otherwise the + // render-to-texture child won't be visible, due to its parent widget not being redrawn + // with a proper blending mask. + const QRegion dirtyBeforeSubtractedOpaqueChildren = wd->dirty; + // Scrolled and moved widgets must draw all children. if (!wd->isScrolled && !wd->isMoved) wd->subtractOpaqueChildren(wd->dirty, w->rect()); + if (wd->dirty.isEmpty() && wd->textureChildSeen) + wd->dirty = dirtyBeforeSubtractedOpaqueChildren; + if (wd->dirty.isEmpty()) { resetWidget(w); continue; |