Method getMat

deps/opencv/modules/core/src/matrix.cpp:947–1006

_InputArray::_InputArray(const ogl::Texture2D& tex) : flags(OPENGL_TEXTURE), obj((void*)&tex) {}

Mat _InputArray::getMat(int i) const
{
    int k = kind();

    if( k == MAT )
    {
        const Mat* m = (const Mat*)obj;
        if( i < 0 )
            return *m;
        return m->row(i);
    }

    if( k == EXPR )
    {
        CV_Assert( i < 0 );
        return (Mat)*((const MatExpr*)obj);
    }

    if( k == MATX )
    {
        CV_Assert( i < 0 );
        return Mat(sz, flags, obj);
    }

    if( k == STD_VECTOR )
    {
        CV_Assert( i < 0 );
        int t = CV_MAT_TYPE(flags);
        const vector<uchar>& v = *(const vector<uchar>*)obj;

        return !v.empty() ? Mat(size(), t, (void*)&v[0]) : Mat();
    }

    if( k == NONE )
        return Mat();

    if( k == STD_VECTOR_VECTOR )
    {
        int t = type(i);
        const vector<vector<uchar> >& vv = *(const vector<vector<uchar> >*)obj;
        CV_Assert( 0 <= i && i < (int)vv.size() );
        const vector<uchar>& v = vv[i];

        return !v.empty() ? Mat(size(i), t, (void*)&v[0]) : Mat();
    }

    if( k == OCL_MAT )
    {
        CV_Error(CV_StsNotImplemented, "This method is not implemented for oclMat yet");
    }

    CV_Assert( k == STD_VECTOR_MAT );
    //if( k == STD_VECTOR_MAT )
    {
        const vector<Mat>& v = *(const vector<Mat>*)obj;
        CV_Assert( 0 <= i && i < (int)v.size() );

        return v[i];