static void
_cairo_ellipsis_negative (cairo_t *cr,
double xc, double yc,
double xradius, double yradius,
double angle1, double angle2)
{
cairo_matrix_t save;
if (xradius <= 0.0 || yradius <= 0.0)
{
cairo_line_to (cr, xc, yc);
return;
}
cairo_get_matrix (cr, &save);
cairo_translate (cr, xc, yc);
cairo_scale (cr, xradius, yradius);
append_arc (cr, angle1, angle2, TRUE);
cairo_set_matrix (cr, &save);
}
//virtual void conic_to(P to, P diff) {}
//virtual void arc_small_den(P p) {} // dxf_writer lacks this functn!
virtual void arc(P p2, double r, P c, double gr, double bulge) {
append_arc(p2,r,c);
}