/**
 * @file drawContours.cpp
 * @brief mex interface for drawContours
 * @author Kota Yamaguchi
 * @date 2011
 */
#include "mexopencv.hpp"
using namespace std;
using namespace cv;

/**
 * Main entry called from Matlab
 * @param nlhs number of left-hand-side arguments
 * @param plhs pointers to mxArrays in the left-hand-side
 * @param nrhs number of right-hand-side arguments
 * @param prhs pointers to mxArrays in the right-hand-side
 */
void mexFunction( int nlhs, mxArray *plhs[],
                  int nrhs, const mxArray *prhs[] )
{
    typedef vector<Point> VecP;
    
    // Check the number of arguments
    if (nrhs<2 || ((nrhs%2)!=0) || nlhs>1)
        mexErrMsgIdAndTxt("mexopencv:error","Wrong number of arguments");
    
    // Argument vector
    vector<MxArray> rhs(prhs,prhs+nrhs);
    
    Mat image(rhs[0].toMat(CV_8U));
    
    const_mem_fun_ref_t<VecP,MxArray> f(&MxArray::toVector<Point>);
    vector<VecP> contours(rhs[1].toVector(f));
    
    int contourIdx=-1;
    Scalar color(255,255,255);
    int thickness=1;
    int lineType=8;
    vector<Vec4i> hierarchy;
    int maxLevel=INT_MAX;
    Point offset;
    
    for (int i=2; i<nrhs; i+=2) {
        string key = rhs[i].toString();
        if (key=="ContourIdx")
            contourIdx = rhs[i+1].toInt();
        else if (key=="Color")
            color = rhs[i+1].toScalar();
        else if (key=="Thickness")
            thickness = rhs[i+1].toInt();
        else if (key=="LineType")
            lineType = rhs[i+1].toInt();
        else if (key=="Hierarchy") {
            vector<Mat> hm(rhs[i+1].toVector<Mat>());
            hierarchy = vector<Vec4i>(hm.begin(),hm.end());
        }
        else if (key=="MaxLevel")
            maxLevel = rhs[i+1].toInt();
        else if (key=="Offset")
            offset = rhs[i+1].toPoint();
        else
            mexErrMsgIdAndTxt("mexopencv:error","Unrecognized option");
    }
    
    // Process
    drawContours(image, contours, contourIdx, color, thickness, lineType,
        hierarchy, maxLevel, offset);
    plhs[0] = MxArray(image);
}