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author | Andy Nichols <andy.nichols@digia.com> | 2014-09-23 12:43:41 +0200 |
---|---|---|
committer | Andy Nichols <andy.nichols@digia.com> | 2014-09-30 11:33:54 +0300 |
commit | 977ef099b21031363e0d0b9b04d77f373c4dd03b (patch) | |
tree | 324f6ca4fd57f93476089a55d4dfc167930577ae /src/plugins/scenegraph | |
parent | 255773dcba72817fea1295462337948ef91e996c (diff) |
Make sure to clear backingstore with Source Composition Mode
This prevents blending with either garbage or the contents of the
previous buffer when clearing with colors with an alpha.
Change-Id: I52fc13c2af224a37206e51efd38301b95085c9b2
Reviewed-by: Andy Nichols <andy.nichols@digia.com>
Diffstat (limited to 'src/plugins/scenegraph')
-rw-r--r-- | src/plugins/scenegraph/softwarecontext/context.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/src/plugins/scenegraph/softwarecontext/context.cpp b/src/plugins/scenegraph/softwarecontext/context.cpp index 42780209c2..1d3bec674d 100644 --- a/src/plugins/scenegraph/softwarecontext/context.cpp +++ b/src/plugins/scenegraph/softwarecontext/context.cpp @@ -82,8 +82,9 @@ void Renderer::render() QPaintDevice *device = m_backingStore->paintDevice(); QPainter painter(device); painter.setRenderHint(QPainter::Antialiasing); - + painter.setCompositionMode(QPainter::CompositionMode_Source); painter.fillRect(rect, clearColor()); + painter.setCompositionMode(QPainter::CompositionMode_SourceOver); RenderingVisitor(&painter).visitChildren(rootNode()); m_backingStore->endPaint(); |