added cv::repeat to T-API (fix for copyTo -> UMat is needed)

modules/core/src/arithm.cpp

@@ -2626,12 +2626,9 @@ void cv::compare(InputArray _src1, InputArray _src2, OutputArray _dst, int op)
     CV_Assert( op == CMP_LT || op == CMP_LE || op == CMP_EQ ||
                op == CMP_NE || op == CMP_GE || op == CMP_GT );
 
-    if (ocl::useOpenCL() && _dst.isUMat() /*&&
-            ocl_compare(_src1, _src2, _dst, op)*/)
-    {
-        CV_Assert(ocl_compare(_src1, _src2, _dst, op));
+    if (ocl::useOpenCL() && _dst.isUMat() &&
+            ocl_compare(_src1, _src2, _dst, op))
         return;
-    }
 
     int kind1 = _src1.kind(), kind2 = _src2.kind();
     Mat src1 = _src1.getMat(), src2 = _src2.getMat();

modules/core/src/mathfuncs.cpp

@@ -534,12 +534,9 @@ static bool ocl_cartToPolar( InputArray _src1, InputArray _src2,
 void cartToPolar( InputArray src1, InputArray src2,
                   OutputArray dst1, OutputArray dst2, bool angleInDegrees )
 {
-    if (ocl::useOpenCL() && dst1.isUMat() && dst2.isUMat() /*&&
-            ocl_cartToPolar(src1, src2, dst1, dst2, angleInDegrees)*/)
-    {
-        CV_Assert(ocl_cartToPolar(src1, src2, dst1, dst2, angleInDegrees));
+    if (ocl::useOpenCL() && dst1.isUMat() && dst2.isUMat() &&
+            ocl_cartToPolar(src1, src2, dst1, dst2, angleInDegrees))
         return;
-    }
 
     Mat X = src1.getMat(), Y = src2.getMat();
     int type = X.type(), depth = X.depth(), cn = X.channels();
@@ -2062,11 +2059,8 @@ static bool ocl_pow(InputArray _src, double power, OutputArray _dst)
 
 void pow( InputArray _src, double power, OutputArray _dst )
 {
-    if (ocl::useOpenCL() && _dst.isUMat() /*&& ocl_pow(_src, power, _dst)*/)
-    {
-        CV_Assert(ocl_pow(_src, power, _dst));
+    if (ocl::useOpenCL() && _dst.isUMat() && ocl_pow(_src, power, _dst))
         return;
-    }
 
     Mat src = _src.getMat();
     int type = src.type(), depth = src.depth(), cn = src.channels();

modules/core/src/ocl.cpp

@@ -1893,7 +1893,7 @@ Context2& Context2::getDefault()
         // First, try to retrieve existing context of the same type.
         // In its turn, Platform::getContext() may call Context2::create()
         // if there is no such context.
-        ctx.create(Device::TYPE_CPU);
+        ctx.create(Device::TYPE_ACCELERATOR);
         if(!ctx.p)
             ctx.create(Device::TYPE_DGPU);
         if(!ctx.p)