diff options
| -rw-r--r-- | src/gui/painting/qplatformbackingstore_qpa.cpp | 3 | ||||
| -rw-r--r-- | src/widgets/kernel/qwidget.cpp | 12 | ||||
| -rw-r--r-- | src/widgets/kernel/qwidget_p.h | 3 |
3 files changed, 13 insertions, 5 deletions
diff --git a/src/gui/painting/qplatformbackingstore_qpa.cpp b/src/gui/painting/qplatformbackingstore_qpa.cpp index ff7d91ccea..485190d301 100644 --- a/src/gui/painting/qplatformbackingstore_qpa.cpp +++ b/src/gui/painting/qplatformbackingstore_qpa.cpp @@ -114,9 +114,6 @@ QWindow* QPlatformBackingStore::window() const This function is called before painting onto the surface begins, with the \a region in which the painting will occur. - \note A platform providing a backing store with an alpha channel - needs to properly initialize the region to be painted. - \sa endPaint(), paintDevice() */ diff --git a/src/widgets/kernel/qwidget.cpp b/src/widgets/kernel/qwidget.cpp index f02a67d9ea..662c9b7403 100644 --- a/src/widgets/kernel/qwidget.cpp +++ b/src/widgets/kernel/qwidget.cpp @@ -2137,7 +2137,15 @@ void QWidgetPrivate::paintBackground(QPainter *painter, const QRegion &rgn, int if ((flags & DrawAsRoot) && !(q->autoFillBackground() && autoFillBrush.isOpaque())) { const QBrush bg = q->palette().brush(QPalette::Window); - fillRegion(painter, rgn, bg); + if (!(flags & DontSetCompositionMode)) { + //copy alpha straight in + QPainter::CompositionMode oldMode = painter->compositionMode(); + painter->setCompositionMode(QPainter::CompositionMode_Source); + fillRegion(painter, rgn, bg); + painter->setCompositionMode(oldMode); + } else { + fillRegion(painter, rgn, bg); + } } if (q->autoFillBackground()) @@ -5229,6 +5237,8 @@ void QWidgetPrivate::render(QPaintDevice *target, const QPoint &targetOffset, else flags |= DontSubtractOpaqueChildren; + flags |= DontSetCompositionMode; + if (target->devType() == QInternal::Printer) { QPainter p(target); render_helper(&p, targetOffset, paintRegion, renderFlags); diff --git a/src/widgets/kernel/qwidget_p.h b/src/widgets/kernel/qwidget_p.h index 8107b6ca74..d3fcdce6a8 100644 --- a/src/widgets/kernel/qwidget_p.h +++ b/src/widgets/kernel/qwidget_p.h @@ -284,7 +284,8 @@ public: DrawInvisible = 0x08, DontSubtractOpaqueChildren = 0x10, DontDrawOpaqueChildren = 0x20, - DontDrawNativeChildren = 0x40 + DontDrawNativeChildren = 0x40, + DontSetCompositionMode = 0x80 }; enum CloseMode { |