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Merge pull request #23503 from seanm:issue13729

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Fixed undefined left shifting of negative number
This commit is contained in:
Alexander Smorkalov 2023-04-20 12:10:04 +03:00 committed by GitHub
commit 4c06a721ef
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1 changed files with 2 additions and 2 deletions
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modules/imgproc/src/drawing.cpp
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@ -358,7 +358,7 @@ LineAA( Mat& img, Point2l pt1, Point2l pt2, const void* color )
pt1.y ^= pt2.y & j;
x_step = XY_ONE;
y_step = (dy << XY_SHIFT) / (ax | 1);
y_step = (int64)((uint64_t)dy << XY_SHIFT) / (ax | 1);
pt2.x += XY_ONE;
ecount = (int)((pt2.x >> XY_SHIFT) - (pt1.x >> XY_SHIFT));
j = -(pt1.x & (XY_ONE - 1));
@ -380,7 +380,7 @@ LineAA( Mat& img, Point2l pt1, Point2l pt2, const void* color )
pt2.y ^= pt1.y & i;
pt1.y ^= pt2.y & i;
x_step = (dx << XY_SHIFT) / (ay | 1);
x_step = (int64)((uint64_t)dx << XY_SHIFT) / (ay | 1);
y_step = XY_ONE;
pt2.y += XY_ONE;
ecount = (int)((pt2.y >> XY_SHIFT) - (pt1.y >> XY_SHIFT));