is there a method to draw/fill a rounded rectangle?

This is the code I use for rounded rects in my programs:

function RectRnd(x1,y1,x2,y2,r) {
    pp = [];
    pp.push.apply(pp,g.quadraticBezier([x2-r,y1, x2,y1,x2,y1+r]));
    pp.push.apply(pp,g.quadraticBezier([x2,y2-r,x2,y2,x2-r,y2]));
    pp.push.apply(pp,g.quadraticBezier([x1+r,y2,x1,y2,x1,y2-r]));
    pp.push.apply(pp,g.quadraticBezier([x1,y1+r,x1,y1,x1+r,y1]));
    return pp;
  }
  function fillRectRnd(x1,y1,x2,y2,r,c) {
    g.setColor(c);
    g.fillPoly(RectRnd(x1,y1,x2,y2,r),1);
    g.setColor(255,255,255);
  }
  function drawRectRnd(x1,y1,x2,y2,r,c) {
    g.setColor(c);
    g.drawPoly(RectRnd(x1,y1,x2,y2,r),1);
    g.setColor(255,255,255);
  }