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Avoid asserting when painting certain degenerate bezier paths

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It could happen that the stroker would attempt to join empty subpaths,
resulting in an invalid path structure that would cause assert later.

Task-number: QTBUG-43474
Change-Id: Ia369a31e60c40cdae3900d96f15f3e83c9e78b97
Reviewed-by: Lars Knoll <lars.knoll@theqtcompany.com>
This commit is contained in:
Eirik Aavitsland 2016-04-29 11:16:31 +02:00
parent acf43c17b6
commit 40a9216e06
1 changed files with 1 additions and 1 deletions
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2
src/gui/painting/qstroker.cpp
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@ -422,7 +422,7 @@ void QStroker::processCurrentSubpath()
bool fwclosed = qt_stroke_side(&fwit, this, false, &fwStartTangent);
bool bwclosed = qt_stroke_side(&bwit, this, !fwclosed, &bwStartTangent);
if (!bwclosed)
if (!bwclosed && !fwStartTangent.isNull())
joinPoints(m_elements.at(0).x, m_elements.at(0).y, fwStartTangent, m_capStyle);
}