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| author | Allan Sandfeld Jensen <allan.jensen@qt.io> | 2021-04-14 12:59:20 +0200 |
|---|---|---|
| committer | Qt Cherry-pick Bot <cherrypick_bot@qt-project.org> | 2021-04-14 20:58:39 +0000 |
| commit | 8eeae7ae073ddd71a9210c0d3d1edaa6c199f509 (patch) | |
| tree | a50365ca22cda8483adf180c479838770cfe9e47 | |
| parent | 6869d2463a2e0d71bd04dbc82f5d6ef4933dc510 (diff) | |
Fix partial pixel coverage calculation
We want right - left, but the numbers we have are (1 - left) and right,
so we need right - (1 - left) = right + left - 1.
Fixes: QTBUG-91957
Fixes: QTBUG-92485
Change-Id: I238cbbe1eebddff1ce56da38127899cdbd21db0e
Reviewed-by: Eirik Aavitsland <eirik.aavitsland@qt.io>
(cherry picked from commit 004189b2d8e751021f26d9eb28948f753ea8208c)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
| -rw-r--r-- | src/gui/painting/qrasterizer.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/gui/painting/qrasterizer.cpp b/src/gui/painting/qrasterizer.cpp index 48d41f41f0..e851a3876a 100644 --- a/src/gui/painting/qrasterizer.cpp +++ b/src/gui/painting/qrasterizer.cpp @@ -864,7 +864,7 @@ void QRasterizer::rasterizeLine(const QPointF &a, const QPointF &b, qreal width, if (leftWidth == QScFixedFactor) coverage[0] = rightWidth * 255; else - coverage[0] = (leftWidth + rightWidth) * 255; + coverage[0] = (rightWidth + leftWidth - QScFixedFactor) * 255; x[0] = iLeft; len[0] = 1; } else { |