adding test for polylines() call with empty Point-s vector and fix for crash in this case

2015-04-24 16:40:14 +03:00
parent 26e3bcb9de
commit 40b762bceb
2 changed files with 23 additions and 0 deletions
--- a/modules/core/src/drawing.cpp
+++ b/modules/core/src/drawing.cpp
@@ -2215,7 +2215,10 @@ void cv::polylines(InputOutputArray _img, InputArrayOfArrays pts,
    {
        Mat p = pts.getMat(manyContours ? i : -1);
        if( p.total() == 0 )
+        {
+            npts[i] = 0;
            continue;
+        }
        CV_Assert(p.checkVector(2, CV_32S) >= 0);
        ptsptr[i] = (Point*)p.data;
        npts[i] = p.rows*p.cols*p.channels()/2;