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#ifndef __OPENCV_SEAM_FINDERS_HPP__
#define __OPENCV_SEAM_FINDERS_HPP__

#include "precomp.hpp"

class SeamFinder
{
public:
    enum { NO, VORONOI, GC_COLOR, GC_COLOR_GRAD };
    static cv::Ptr<SeamFinder> createDefault(int type);

    virtual ~SeamFinder() {}
    virtual void find(const std::vector<cv::Mat> &src, const std::vector<cv::Point> &corners,
                      std::vector<cv::Mat> &masks) = 0;
};


class NoSeamFinder : public SeamFinder
{
public:
    void find(const std::vector<cv::Mat>&, const std::vector<cv::Point>&, std::vector<cv::Mat>&) {}
};


class PairwiseSeamFinder : public SeamFinder
{
public:
    virtual void find(const std::vector<cv::Mat> &src, const std::vector<cv::Point> &corners,
                      std::vector<cv::Mat> &masks);

protected:
    virtual void findInPair(size_t first, size_t second, cv::Rect roi) = 0;

    std::vector<cv::Mat> images_;
    std::vector<cv::Point> corners_;
    std::vector<cv::Mat> masks_;
};


class VoronoiSeamFinder : public PairwiseSeamFinder
{
private:
    void findInPair(size_t first, size_t second, cv::Rect roi);
};


class GraphCutSeamFinder : public SeamFinder
{
public:
    enum { COST_COLOR, COST_COLOR_GRAD };
    GraphCutSeamFinder(int cost_type = COST_COLOR_GRAD, float terminal_cost = 10000.f,
                       float bad_region_penalty = 1000.f);

    void find(const std::vector<cv::Mat> &src, const std::vector<cv::Point> &corners,
              std::vector<cv::Mat> &masks);

private:
    class Impl;
    cv::Ptr<Impl> impl_;
};

#endif // __OPENCV_SEAM_FINDERS_HPP__