Function bounding_rect_single

renderers/agg/include/agg_bounding_rect.h:75–111

    //-----------------------------------------------------bounding_rect_single
    template<class VertexSource, class CoordT> 
    bool bounding_rect_single(VertexSource& vs, unsigned path_id,
                              CoordT* x1, CoordT* y1, CoordT* x2, CoordT* y2)
    {
        double x;
        double y;
        bool first = true;

        *x1 = CoordT(1);
        *y1 = CoordT(1);
        *x2 = CoordT(0);
        *y2 = CoordT(0);

        vs.rewind(path_id);
        unsigned cmd;
        while(!is_stop(cmd = vs.vertex(&x, &y)))
        {
            if(is_vertex(cmd))
            {
                if(first)
                {
                    *x1 = CoordT(x);
                    *y1 = CoordT(y);
                    *x2 = CoordT(x);
                    *y2 = CoordT(y);
                    first = false;
                }
                else
                {
                    if(CoordT(x) < *x1) *x1 = CoordT(x);
                    if(CoordT(y) < *y1) *y1 = CoordT(y);
                    if(CoordT(x) > *x2) *x2 = CoordT(x);
                    if(CoordT(y) > *y2) *y2 = CoordT(y);
                }
            }
        }
        return *x1 <= *x2 && *y1 <= *y2;
    }


}