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#include "test_precomp.hpp"
#include "opencv2/opencv_modules.hpp"

namespace opencv_test { namespace {

#ifdef HAVE_OPENCV_XFEATURES2D

TEST(SurfFeaturesFinder, CanFindInROIs)
{
    Ptr<detail::FeaturesFinder> finder = makePtr<detail::SurfFeaturesFinder>();
    Mat img  = imread(string(cvtest::TS::ptr()->get_data_path()) + "cv/shared/lena.png");

    vector<Rect> rois;
    rois.push_back(Rect(0, 0, img.cols / 2, img.rows / 2));
    rois.push_back(Rect(img.cols / 2, img.rows / 2, img.cols - img.cols / 2, img.rows - img.rows / 2));
    detail::ImageFeatures roi_features;
    (*finder)(img, roi_features, rois);

    int tl_rect_count = 0, br_rect_count = 0, bad_count = 0;
    for (size_t i = 0; i < roi_features.keypoints.size(); ++i)
    {
        Point2f pt = roi_features.keypoints[i].pt;
        if (pt.x >= rois[0].x && pt.y >= rois[0].y && pt.x <= rois[0].br().x && pt.y <= rois[0].br().y)
            tl_rect_count++;
        else if (pt.x >= rois[1].x && pt.y >= rois[1].y && pt.x <= rois[1].br().x && pt.y <= rois[1].br().y)
            br_rect_count++;
        else
            bad_count++;
    }

    ASSERT_GT(tl_rect_count, 0);
    ASSERT_GT(br_rect_count, 0);
    ASSERT_EQ(bad_count, 0);
}

#endif // HAVE_OPENCV_XFEATURES2D

TEST(ParallelFeaturesFinder, IsSameWithSerial)
{
    Ptr<detail::FeaturesFinder> para_finder = makePtr<detail::OrbFeaturesFinder>();
    Ptr<detail::FeaturesFinder> serial_finder = makePtr<detail::OrbFeaturesFinder>();
    Mat img  = imread(string(cvtest::TS::ptr()->get_data_path()) + "stitching/a3.png", IMREAD_GRAYSCALE);

    vector<Mat> imgs(50, img);
    detail::ImageFeatures serial_features;
    vector<detail::ImageFeatures> para_features(imgs.size());

    (*serial_finder)(img, serial_features);
    (*para_finder)(imgs, para_features);

    // results must be the same
    for(size_t i = 0; i < para_features.size(); ++i)
    {
        Mat diff_descriptors = serial_features.descriptors.getMat(ACCESS_READ) != para_features[i].descriptors.getMat(ACCESS_READ);
        ASSERT_EQ(countNonZero(diff_descriptors), 0);
        ASSERT_EQ(serial_features.img_size, para_features[i].img_size);
        ASSERT_EQ(serial_features.keypoints.size(), para_features[i].keypoints.size());
    }
}

}} // namespace