type t = {
  1. mutable first : int;
  2. mutable count : int;
  3. mutable closed : bool;
  4. mutable nbevel : int;
  5. mutable fill : VertexBuffer.Sub.t;
  6. mutable stroke : VertexBuffer.Sub.t;
  7. mutable winding : Winding.t;
  8. mutable convex : bool;
}
val create : unit -> t
val reset : t -> unit