Merge pull request #2004 from ilya-lavrenov:tapi_umat_copyto

modules/core/src/umatrix.cpp

@@ -643,11 +643,10 @@ void UMat::copyTo(OutputArray _dst) const
     if( _dst.kind() == _InputArray::UMAT )
     {
         UMat dst = _dst.getUMat();
-        void* srchandle = handle(ACCESS_READ);
-        void* dsthandle = dst.handle(ACCESS_WRITE);
-        if( srchandle == dsthandle && dst.offset == offset )
+        if( u == dst.u && dst.offset == offset )
             return;
         dst.ndoffset(dstofs);
+        dstofs[dims-1] *= esz;
         CV_Assert(u->currAllocator == dst.u->currAllocator);
         u->currAllocator->copy(u, dst.u, dims, sz, srcofs, step.p, dstofs, dst.step.p, false);
     }

modules/core/test/ocl/test_matrix_operation.cpp

@@ -103,9 +103,27 @@ OCL_TEST_P(ConvertTo, Accuracy)
     }
 }
 
+typedef MatrixTestBase CopyTo;
+
+OCL_TEST_P(CopyTo, Accuracy)
+{
+    for (int j = 0; j < test_loop_times; j++)
+    {
+        generateTestData();
+
+        OCL_OFF(src_roi.copyTo(dst_roi));
+        OCL_ON(usrc_roi.copyTo(udst_roi));
+
+        OCL_EXPECT_MATS_NEAR(dst, 0);
+    }
+}
+
 OCL_INSTANTIATE_TEST_CASE_P(MatrixOperation, ConvertTo, Combine(
                             OCL_ALL_DEPTHS, OCL_ALL_DEPTHS, OCL_ALL_CHANNELS, Bool()));
 
+OCL_INSTANTIATE_TEST_CASE_P(MatrixOperation, CopyTo, Combine(
+                                OCL_ALL_DEPTHS, Values((MatDepth)0), OCL_ALL_CHANNELS, Bool()));
+
 } } // namespace cvtest::ocl
 
 #endif