void compute_spline (spline* s);
void compute_closed_spline (spline* s);
void just_fill_spline (spline* s);
void append_spline_points (spline* s1, spline* s2);
void spline_bounding_box (spline* s, XRectangle* rectangle_out);
void compute_spline (spline* s);
void compute_closed_spline (spline* s);
void just_fill_spline (spline* s);
void append_spline_points (spline* s1, spline* s2);
void spline_bounding_box (spline* s, XRectangle* rectangle_out);