core: workaround transform() inplace calls

77346d72 · Alexander Alekhin · ba0b3983 · 77346d72
Commit 77346d72 authored Oct 01, 2019 by Alexander Alekhin
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matmul.dispatch.cpp modules/core/src/matmul.dispatch.cpp +6 -0

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--- a/modules/core/src/matmul.dispatch.cpp
+++ b/modules/core/src/matmul.dispatch.cpp
@@ -442,6 +442,12 @@ void transform(InputArray _src, OutputArray _dst, InputArray _mtx)
    _dst.create( src.size(), CV_MAKETYPE(depth, dcn) );
    Mat dst = _dst.getMat();

+    if (src.data == dst.data)  // inplace case
+    {
+        CV_Assert(scn == dcn);
+        src = src.clone();  // TODO Add performance warning
+    }
+
    int mtype = depth == CV_32S || depth == CV_64F ? CV_64F : CV_32F;
    AutoBuffer<double> _mbuf;
    double* mbuf;