Merge pull request #21512 from vrabaud:3.4_ub_drawing

3 years ago · e3a4ff33d2
parent 92af03579c abb5c9fd92
commit e3a4ff33d2
1 changed files with 2 additions and 2 deletions
--- a/modules/imgproc/src/drawing.cpp
+++ b/modules/imgproc/src/drawing.cpp
@ -655,7 +655,7 @@ Line2( 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 = dy * (1 << XY_SHIFT) / (ax | 1);
        ecount = (int)((pt2.x - pt1.x) >> XY_SHIFT);
    }
    else
@ -668,7 +668,7 @@ Line2( 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 = dx * (1 << XY_SHIFT) / (ay | 1);
        y_step = XY_ONE;
        ecount = (int)((pt2.y - pt1.y) >> XY_SHIFT);
    }