draw_vars

type draw_vars = record

  idx: unsigned;

  x1: int;

  y1: int;

  x2: int;

  y2: int;

  curr: line_parameters;

  Next: line_parameters;

  lcurr: int;

  lnext: int;

  xb1: int;

  yb1: int;

  xb2: int;

  yb2: int;

  flags: unsigned;

end;