Method push_back

deps/opencv/modules/core/src/matrix.cpp:639–679

}

void Mat::push_back(const Mat& elems)
{
    int r = size.p[0], delta = elems.size.p[0];
    if( delta == 0 )
        return;
    if( this == &elems )
    {
        Mat tmp = elems;
        push_back(tmp);
        return;
    }
    if( !data )
    {
        *this = elems.clone();
        return;
    }

    size.p[0] = elems.size.p[0];
    bool eq = size == elems.size;
    size.p[0] = r;
    if( !eq )
        CV_Error(CV_StsUnmatchedSizes, "");
    if( type() != elems.type() )
        CV_Error(CV_StsUnmatchedFormats, "");

    if( isSubmatrix() || dataend + step.p[0]*delta > datalimit )
        reserve( std::max(r + delta, (r*3+1)/2) );

    size.p[0] += delta;
    dataend += step.p[0]*delta;

    //updateContinuityFlag(*this);

    if( isContinuous() && elems.isContinuous() )
        memcpy(data + r*step.p[0], elems.data, elems.total()*elems.elemSize());
    else
    {
        Mat part = rowRange(r, r + delta);
        elems.copyTo(part);
    }
}


Mat cvarrToMat(const CvArr* arr, bool copyData,