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#ifndef __OPENCV_TEST_GPU_BASE_HPP__
#define __OPENCV_TEST_GPU_BASE_HPP__

//! return true if device supports specified feature and gpu module was built with support the feature.
bool supportFeature(const cv::gpu::DeviceInfo& info, cv::gpu::FeatureSet feature);

//! return all devices compatible with current gpu module build.
const std::vector<cv::gpu::DeviceInfo>& devices();
//! return all devices compatible with current gpu module build which support specified feature.
std::vector<cv::gpu::DeviceInfo> devices(cv::gpu::FeatureSet feature);

//! return vector with types from specified range.
std::vector<int> types(int depth_start, int depth_end, int cn_start, int cn_end);

//! return vector with all types (depth: CV_8U-CV_64F, channels: 1-4).
const std::vector<int>& all_types();

//! read image from testdata folder.
cv::Mat readImage(const std::string& fileName, int flags = CV_LOAD_IMAGE_COLOR);

double checkNorm(const cv::Mat& m1, const cv::Mat& m2);
double checkSimilarity(const cv::Mat& m1, const cv::Mat& m2);

#define OSTR_NAME(suf) ostr_ ## suf

#define PRINT_PARAM(name) \
        std::ostringstream OSTR_NAME(name); \
        OSTR_NAME(name) << # name << ": " << name; \
        SCOPED_TRACE(OSTR_NAME(name).str());

#define PRINT_TYPE(type) \
        std::ostringstream OSTR_NAME(type); \
        OSTR_NAME(type) << # type << ": " << cvtest::getTypeName(type) << "c" << CV_MAT_CN(type); \
        SCOPED_TRACE(OSTR_NAME(type).str());

#define EXPECT_MAT_NEAR(mat1, mat2, eps) \
    { \
        ASSERT_EQ(mat1.type(), mat2.type()); \
        ASSERT_EQ(mat1.size(), mat2.size()); \
        EXPECT_LE(checkNorm(mat1, mat2), eps); \
    }

#define EXPECT_MAT_SIMILAR(mat1, mat2, eps) \
    { \
        ASSERT_EQ(mat1.type(), mat2.type()); \
        ASSERT_EQ(mat1.size(), mat2.size()); \
        EXPECT_LE(checkSimilarity(mat1, mat2), eps); \
    }


//! for gtest ASSERT
namespace cv
{
    std::ostream& operator << (std::ostream& os, const Size& sz);
    std::ostream& operator << (std::ostream& os, const Scalar& s);
    namespace gpu
    {
        std::ostream& operator << (std::ostream& os, const DeviceInfo& info);
    }
}

#endif // __OPENCV_TEST_GPU_BASE_HPP__