Merge pull request #25633 from savuor:rv/rotate_tests

Tests for cv::rotate() added #25633

fixes #25449

### Pull Request Readiness Checklist

See details at https://github.com/opencv/opencv/wiki/How_to_contribute#making-a-good-pull-request

- [x] I agree to contribute to the project under Apache 2 License.
- [x] To the best of my knowledge, the proposed patch is not based on a code under GPL or another license that is incompatible with OpenCV
- [x] The PR is proposed to the proper branch
- [x] There is a reference to the original bug report and related work
- [x] There is accuracy test, performance test and test data in opencv_extra repository, if applicable
      Patch to opencv_extra has the same branch name.
- [x] The feature is well documented and sample code can be built with the project CMake

modules/core/perf/opencl/perf_arithm.cpp

@@ -374,6 +374,36 @@ OCL_PERF_TEST_P(FlipFixture, Flip,
     SANITY_CHECK(dst);
 }
 
+///////////// Rotate ////////////////////////
+
+enum
+{
+    ROTATE_90_CLOCKWISE = 0, ROTATE_180, ROTATE_90_COUNTERCLOCKWISE
+};
+
+CV_ENUM(RotateType, ROTATE_90_CLOCKWISE, ROTATE_180, ROTATE_90_COUNTERCLOCKWISE)
+
+typedef tuple<Size, MatType, RotateType> RotateParams;
+typedef TestBaseWithParam<RotateParams> RotateFixture;
+
+OCL_PERF_TEST_P(RotateFixture, rotate,
+                ::testing::Combine(OCL_TEST_SIZES, OCL_TEST_TYPES, RotateType::all()))
+{
+    const RotateParams params = GetParam();
+    const Size srcSize   = get<0>(params);
+    const int type       = get<1>(params);
+    const int rotateCode = get<2>(params);
+
+    checkDeviceMaxMemoryAllocSize(srcSize, type);
+
+    UMat src(srcSize, type), dst(srcSize, type);
+    declare.in(src, WARMUP_RNG).out(dst);
+
+    OCL_TEST_CYCLE() cv::rotate(src, dst, rotateCode);
+
+    SANITY_CHECK_NOTHING();
+}
+
 ///////////// minMaxLoc ////////////////////////
 
 typedef Size_MatType MinMaxLocFixture;

modules/core/perf/perf_arithm.cpp

@@ -452,6 +452,33 @@ INSTANTIATE_TEST_CASE_P(/*nothing*/ , BinaryOpTest,
     )
 );
 
+///////////// Rotate ////////////////////////
+
+typedef perf::TestBaseWithParam<std::tuple<cv::Size, int, perf::MatType>> RotateTest;
+
+PERF_TEST_P_(RotateTest, rotate)
+{
+    Size sz        = get<0>(GetParam());
+    int rotatecode = get<1>(GetParam());
+    int type       = get<2>(GetParam());
+    cv::Mat a(sz, type), b(sz, type);
+
+    declare.in(a, WARMUP_RNG).out(b);
+
+    TEST_CYCLE() cv::rotate(a, b, rotatecode);
+
+    SANITY_CHECK_NOTHING();
+}
+
+INSTANTIATE_TEST_CASE_P(/*nothing*/ , RotateTest,
+    testing::Combine(
+        testing::Values(szVGA, sz720p, sz1080p),
+        testing::Values(ROTATE_180, ROTATE_90_CLOCKWISE, ROTATE_90_COUNTERCLOCKWISE),
+        testing::Values(CV_8UC1, CV_8UC3, CV_8UC4, CV_8SC1, CV_16SC1, CV_16SC2, CV_16SC3, CV_16SC4, CV_32SC1, CV_32FC1)
+    )
+);
+
+
 ///////////// PatchNaNs ////////////////////////
 
 template<typename _Tp>

modules/core/test/test_arithm.cpp

@@ -831,6 +831,7 @@ struct ConvertScaleAbsOp : public BaseElemWiseOp
 
 namespace reference {
 
+// does not support inplace operation
 static void flip(const Mat& src, Mat& dst, int flipcode)
 {
     CV_Assert(src.dims == 2);
@@ -852,6 +853,26 @@ static void flip(const Mat& src, Mat& dst, int flipcode)
     }
 }
 
+static void rotate(const Mat& src, Mat& dst, int rotateMode)
+{
+    Mat tmp;
+    switch (rotateMode)
+    {
+    case ROTATE_90_CLOCKWISE:
+        cvtest::transpose(src, tmp);
+        reference::flip(tmp, dst, 1);
+        break;
+    case ROTATE_180:
+        reference::flip(src, dst, -1);
+        break;
+    case ROTATE_90_COUNTERCLOCKWISE:
+        cvtest::transpose(src, tmp);
+        reference::flip(tmp, dst, 0);
+        break;
+    default:
+        break;
+    }
+}
 
 static void setIdentity(Mat& dst, const Scalar& s)
 {
@@ -898,6 +919,32 @@ struct FlipOp : public BaseElemWiseOp
     int flipcode;
 };
 
+struct RotateOp : public BaseElemWiseOp
+{
+    RotateOp() : BaseElemWiseOp(1, FIX_ALPHA+FIX_BETA+FIX_GAMMA, 1, 1, Scalar::all(0)) { rotatecode = 0; }
+    void getRandomSize(RNG& rng, vector<int>& size)
+    {
+        cvtest::randomSize(rng, 2, 2, ARITHM_MAX_SIZE_LOG, size);
+    }
+    void op(const vector<Mat>& src, Mat& dst, const Mat&)
+    {
+        cv::rotate(src[0], dst, rotatecode);
+    }
+    void refop(const vector<Mat>& src, Mat& dst, const Mat&)
+    {
+        reference::rotate(src[0], dst, rotatecode);
+    }
+    void generateScalars(int, RNG& rng)
+    {
+        rotatecode = rng.uniform(0, 3);
+    }
+    double getMaxErr(int)
+    {
+        return 0;
+    }
+    int rotatecode;
+};
+
 struct TransposeOp : public BaseElemWiseOp
 {
     TransposeOp() : BaseElemWiseOp(1, FIX_ALPHA+FIX_BETA+FIX_GAMMA, 1, 1, Scalar::all(0)) {}
@@ -1550,6 +1597,7 @@ INSTANTIATE_TEST_CASE_P(Core_InRangeS, ElemWiseTest, ::testing::Values(ElemWiseO
 INSTANTIATE_TEST_CASE_P(Core_InRange, ElemWiseTest, ::testing::Values(ElemWiseOpPtr(new InRangeOp)));
 
 INSTANTIATE_TEST_CASE_P(Core_Flip, ElemWiseTest, ::testing::Values(ElemWiseOpPtr(new FlipOp)));
+INSTANTIATE_TEST_CASE_P(Core_Rotate, ElemWiseTest, ::testing::Values(ElemWiseOpPtr(new RotateOp)));
 INSTANTIATE_TEST_CASE_P(Core_Transpose, ElemWiseTest, ::testing::Values(ElemWiseOpPtr(new TransposeOp)));
 INSTANTIATE_TEST_CASE_P(Core_SetIdentity, ElemWiseTest, ::testing::Values(ElemWiseOpPtr(new SetIdentityOp)));