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#include "test_precomp.hpp"

using namespace cv;
using namespace cv::cuda;
using namespace cv::cudev;
using namespace cvtest;

typedef ::testing::Types<uchar, ushort, short, int, float> AllTypes;
typedef ::testing::Types<short, float> Fp16Types;

////////////////////////////////////////////////////////////////////////////////
// CvtTest

template <typename T>
class CvtTest : public ::testing::Test
{
public:
    void test_gpumat()
    {
        const Size size = randomSize(100, 400);
        const int type = DataType<T>::type;

        Mat src = randomMat(size, type);

        GpuMat_<T> d_src(src);

        GpuMat_<T> dst = cvt_<T>(cvt_<float>(d_src) * 2.0f - 10.0f);

        Mat dst_gold;
        src.convertTo(dst_gold, src.depth(), 2, -10);

        EXPECT_MAT_NEAR(dst_gold, dst, 0.0);
    }
};

// dummy class
template <typename T>
class CvFp16Test : public ::testing::Test
{
public:
    void test_gpumat()
    {
    }
};

template <>
class CvFp16Test <short> : public ::testing::Test
{
public:
    void test_gpumat()
    {
        const Size size = randomSize(100, 400);
        const int type = DataType<float>::type;

        Mat src = randomMat(size, type), dst, ref;

        GpuMat_<float> g_src(src);
        GpuMat g_dst;

        // Fp32 -> Fp16
        cuda::convertFp16(g_src, g_dst);
        cv::convertFp16(src, dst);
        // Fp16 -> Fp32
        cuda::convertFp16(g_dst.clone(), g_dst);
        cv::convertFp16(dst, ref);

        g_dst.download(dst);
        EXPECT_MAT_NEAR(dst, ref, 0.0);
    }
};

template <>
class CvFp16Test <float> : public ::testing::Test
{
public:
    void test_gpumat()
    {
        const Size size = randomSize(100, 400);
        const int type = DataType<float>::type;

        Mat src = randomMat(size, type), dst, ref;

        GpuMat_<float> g_src(src);
        GpuMat g_dst;

        // Fp32 -> Fp16
        cuda::convertFp16(g_src, g_dst);
        cv::convertFp16(src, ref);

        g_dst.download(dst);
        EXPECT_MAT_NEAR(dst, ref, 0.0);
    }
};

TYPED_TEST_CASE(CvtTest, AllTypes);

TYPED_TEST(CvtTest, GpuMat)
{
    CvtTest<TypeParam>::test_gpumat();
}

TYPED_TEST_CASE(CvFp16Test, Fp16Types);

TYPED_TEST(CvFp16Test, GpuMat)
{
    CvFp16Test<TypeParam>::test_gpumat();
}