opencv rectangle

opencv   rectangle

void rectangle( InputOutputArray _img, Point pt1, Point pt2,
                const Scalar& color, int thickness,
                int lineType, int shift )
{
    CV_INSTRUMENT_REGION();

    Mat img = _img.getMat();

    if( lineType == CV_AA && img.depth() != CV_8U )
        lineType = 8;

    CV_Assert( thickness <= MAX_THICKNESS );
    CV_Assert( 0 <= shift && shift <= XY_SHIFT );

    double buf[4];
    scalarToRawData(color, buf, img.type(), 0);

    Point2l pt[4];

    pt[0] = pt1;
    pt[1].x = pt2.x;
    pt[1].y = pt1.y;
    pt[2] = pt2;
    pt[3].x = pt1.x;
    pt[3].y = pt2.y;

    if( thickness >= 0 )
        PolyLine( img, pt, 4, true, buf, thickness, lineType, shift );
    else
        FillConvexPoly( img, pt, 4, buf, lineType, shift );
}

void rectangle( InputOutputArray img, Rect rec,
                const Scalar& color, int thickness,
                int lineType, int shift )
{
    CV_INSTRUMENT_REGION();

    if( !rec.empty() )
        rectangle( img, rec.tl(), rec.br() - Point(1<<shift,1<<shift),
                   color, thickness, lineType, shift );
}

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