copy kernels

modules/gapi/include/opencv2/gapi/core.hpp

@@ -440,6 +440,12 @@ namespace core {
         }
     };
 
+    G_TYPED_KERNEL(GCopy, <GMat(GMat)>, "org.opencv.core.transform.copy") {
+        static GMatDesc outMeta(GMatDesc in) {
+            return in;
+        }
+    };
+
     G_TYPED_KERNEL(GConcatHor, <GMat(GMat, GMat)>, "org.opencv.imgproc.transform.concatHor") {
         static GMatDesc outMeta(GMatDesc l, GMatDesc r) {
             return l.withSizeDelta(+r.size.width, 0);
@@ -1497,6 +1503,19 @@ Output matrix must be of the same depth as input one, size is specified by given
 */
 GAPI_EXPORTS GMat crop(const GMat& src, const Rect& rect);
 
+/** @brief Copies a 2D matrix.
+
+The function copies the matrix.
+
+Output matrix must be of the same size and depth as input one.
+
+@note Function textual ID is "org.opencv.core.transform.copy"
+
+@param src input matrix.
+@sa crop
+*/
+GAPI_EXPORTS GMat copy(const GMat& src);
+
 /** @brief Applies horizontal concatenation to given matrices.
 
 The function horizontally concatenates two GMat matrices (with the same number of rows).

modules/gapi/src/api/kernels_core.cpp

@@ -323,6 +323,11 @@ GMat crop(const GMat& src, const Rect& rect)
     return core::GCrop::on(src, rect);
 }
 
+GMat copy(const GMat& src)
+{
+    return core::GCopy::on(src);
+}
+
 GMat concatHor(const GMat& src1, const GMat& src2)
 {
     return core::GConcatHor::on(src1, src2);

modules/gapi/src/backends/cpu/gcpucore.cpp

@@ -501,6 +501,14 @@ GAPI_OCV_KERNEL(GCPUCrop, cv::gapi::core::GCrop)
     }
 };
 
+GAPI_OCV_KERNEL(GCPUCopy, cv::gapi::core::GCopy)
+{
+    static void run(const cv::Mat& in, cv::Mat& out)
+    {
+        cv::Mat(in).copyTo(out);
+    }
+};
+
 GAPI_OCV_KERNEL(GCPUConcatHor, cv::gapi::core::GConcatHor)
 {
     static void run(const cv::Mat& in1, const cv::Mat& in2, cv::Mat& out)
@@ -611,6 +619,7 @@ cv::gapi::GKernelPackage cv::gapi::core::cpu::kernels()
          , GCPURemap
          , GCPUFlip
          , GCPUCrop
+         , GCPUCopy
          , GCPUConcatHor
          , GCPUConcatVert
          , GCPULUT

modules/gapi/src/backends/fluid/gfluidcore.cpp

@@ -2117,6 +2117,40 @@ GAPI_FLUID_KERNEL(GFluidSqrt, cv::gapi::core::GSqrt, false)
     }
 };
 
+GAPI_FLUID_KERNEL(GFluidCopy, cv::gapi::core::GCopy, false)
+{
+    static const int Window = 1;
+
+    static void run(const View &src, Buffer &dst)
+    {
+        const auto *in  = src.InLine<uchar>(0);
+              auto *out = dst.OutLine<uchar>();
+
+        GAPI_DbgAssert(dst.length() == src.length());
+        GAPI_DbgAssert(dst.meta().chan == src.meta().chan);
+        GAPI_DbgAssert(dst.meta().depth == src.meta().depth);
+
+        int width = src.length();
+        int elem_size = CV_ELEM_SIZE(CV_MAKETYPE(src.meta().depth, src.meta().chan));
+
+        int w = 0; // cycle counter
+
+    #if CV_SIMD128
+        for (; w <= width*elem_size-16; w+=16)
+        {
+            v_uint8x16 a;
+            a = v_load(&in[w]);
+            v_store(&out[w], a);
+        }
+    #endif
+
+        for (; w < width*elem_size; w++)
+        {
+            out[w] = in[w];
+        }
+    }
+};
+
 } // namespace fliud
 } // namespace gapi
 } // namespace cv
@@ -2172,6 +2206,7 @@ cv::gapi::GKernelPackage cv::gapi::core::fluid::kernels()
             ,GFluidInRange
             ,GFluidResize
             ,GFluidSqrt
+            ,GFluidCopy
         #if 0
             ,GFluidMean        -- not fluid
             ,GFluidSum         -- not fluid

modules/gapi/src/backends/ocl/goclcore.cpp

@@ -482,6 +482,14 @@ GAPI_OCL_KERNEL(GOCLCrop, cv::gapi::core::GCrop)
     }
 };
 
+GAPI_OCL_KERNEL(GOCLCopy, cv::gapi::core::GCopy)
+{
+    static void run(const cv::UMat& in, cv::UMat& out)
+    {
+        cv::UMat(in).copyTo(out);
+    }
+};
+
 GAPI_OCL_KERNEL(GOCLConcatHor, cv::gapi::core::GConcatHor)
 {
     static void run(const cv::UMat& in1, const cv::UMat& in2, cv::UMat& out)
@@ -573,6 +581,7 @@ cv::gapi::GKernelPackage cv::gapi::core::ocl::kernels()
          , GOCLRemap
          , GOCLFlip
          , GOCLCrop
+         , GOCLCopy
          , GOCLConcatHor
          , GOCLConcatVert
          , GOCLLUT

modules/gapi/test/common/gapi_core_tests.hpp

@@ -100,6 +100,7 @@ GAPI_TEST_FIXTURE(Merge4Test, initMatsRandU, <>, 0)
 GAPI_TEST_FIXTURE(RemapTest, initMatrixRandU, <>, 0)
 GAPI_TEST_FIXTURE(FlipTest, initMatrixRandU, FIXTURE_API(int), 1, flipCode)
 GAPI_TEST_FIXTURE(CropTest, initMatrixRandU, FIXTURE_API(cv::Rect), 1, rect_to)
+GAPI_TEST_FIXTURE(CopyTest, initMatrixRandU, <>, 0)
 GAPI_TEST_FIXTURE(ConcatHorTest, initNothing, <>, 0)
 GAPI_TEST_FIXTURE(ConcatVertTest, initNothing, <>, 0)
 GAPI_TEST_FIXTURE(ConcatVertVecTest, initNothing, <>, 0)

modules/gapi/test/common/gapi_core_tests_inl.hpp

@@ -1002,6 +1002,32 @@ TEST_P(CropTest, AccuracyTest)
     }
 }
 
+TEST_P(CopyTest, AccuracyTest)
+{
+    cv::Size sz_out = sz;
+    if (dtype != -1)
+    {
+        out_mat_gapi = cv::Mat(sz_out, dtype);
+        out_mat_ocv = cv::Mat(sz_out, dtype);
+    }
+
+    // G-API code //////////////////////////////////////////////////////////////
+    cv::GMat in;
+    auto out = cv::gapi::copy(in);
+
+    cv::GComputation c(in, out);
+    c.apply(in_mat1, out_mat_gapi, getCompileArgs());
+    // OpenCV code /////////////////////////////////////////////////////////////
+    {
+        cv::Mat(in_mat1).copyTo(out_mat_ocv);
+    }
+    // Comparison //////////////////////////////////////////////////////////////
+    {
+        EXPECT_EQ(0, cv::countNonZero(out_mat_ocv != out_mat_gapi));
+        EXPECT_EQ(out_mat_gapi.size(), sz_out);
+    }
+}
+
 TEST_P(ConcatHorTest, AccuracyTest)
 {
     cv::Size sz_out = sz;

modules/gapi/test/cpu/gapi_core_tests_cpu.cpp

@@ -365,6 +365,14 @@ INSTANTIATE_TEST_CASE_P(CropTestCPU, CropTest,
                                 Values(CORE_CPU),
                                 Values(cv::Rect(10, 8, 20, 35), cv::Rect(4, 10, 37, 50))));
 
+INSTANTIATE_TEST_CASE_P(CopyTestCPU, CopyTest,
+                        Combine(Values( CV_8UC1, CV_8UC3, CV_16UC1, CV_16SC1, CV_32FC1 ),
+                                Values(cv::Size(1280, 720),
+                                       cv::Size(640, 480),
+                                       cv::Size(128, 128)),
+                                Values(-1),
+                                Values(CORE_CPU)));
+
 INSTANTIATE_TEST_CASE_P(LUTTestCPU, LUTTest,
                         Combine(Values(CV_8UC1, CV_8UC3),
                                 Values(cv::Size(1280, 720),

modules/gapi/test/cpu/gapi_core_tests_fluid.cpp

@@ -275,6 +275,14 @@ INSTANTIATE_TEST_CASE_P(ReInitOutTestFluid, ReInitOutTest,
                                 Values(cv::Size(640, 400),
                                        cv::Size(10, 480))));
 
+INSTANTIATE_TEST_CASE_P(CopyTestFluid, CopyTest,
+                        Combine(Values( CV_8UC1, CV_8UC3, CV_16UC1, CV_16SC1, CV_32FC1 ),
+                                Values(cv::Size(1280, 720),
+                                       cv::Size(640, 480),
+                                       cv::Size(128, 128)),
+                                Values(-1),
+                                Values(CORE_FLUID)));
+
 //----------------------------------------------------------------------
 // FIXME: Clean-up test configurations which are enabled already
 #if 0

modules/gapi/test/gpu/gapi_core_tests_gpu.cpp

@@ -336,6 +336,14 @@ INSTANTIATE_TEST_CASE_P(CropTestGPU, CropTest,
                                 Values(CORE_GPU),
                                 Values(cv::Rect(10, 8, 20, 35), cv::Rect(4, 10, 37, 50))));
 
+INSTANTIATE_TEST_CASE_P(CopyTestGPU, CopyTest,
+                        Combine(Values( CV_8UC1, CV_8UC3, CV_16UC1, CV_16SC1, CV_32FC1 ),
+                                Values(cv::Size(1280, 720),
+                                       cv::Size(640, 480),
+                                       cv::Size(128, 128)),
+                                Values(-1),
+                                Values(CORE_GPU)));
+
 INSTANTIATE_TEST_CASE_P(LUTTestGPU, LUTTest,
                         Combine(Values(CV_8UC1, CV_8UC3),
                                 Values(cv::Size(1280, 720),