Bitmapdata scale9

Hello I am wanting to use a scale9grid method to resize images. Is this part of the nme api not yet implemented in jeash?

For example this works with flash and cpp but not the html5;

public static function scale9Bitmap (w:Int,h:Int,_scale9Grid:Rectangle,originalBitmap:BitmapData):BitmapData {
  var bmpData:BitmapData = new BitmapData (w,h,true,0x00000000);

  var rows:Array<Float> = [0,_scale9Grid.top,_scale9Grid.bottom,originalBitmap.height] ;
  var cols:Array<Float> = [0,_scale9Grid.left,_scale9Grid.right,originalBitmap.width];

  var dRows:Array<Float> = [0,_scale9Grid.top,h - (originalBitmap.height - _scale9Grid.bottom),h];
  var dCols:Array<Float> = [0,_scale9Grid.left,w - (originalBitmap.width - _scale9Grid.right),w];

  var origin:Rectangle;
  var draw:Rectangle;
  var mat:Matrix = new Matrix ();

  var cx:Int = 0;
  while (cx < 3) {

   var cy:Int = 0;
   while (cy < 3) {
    origin = new Rectangle (cols[cx],rows[cy],cols[cx + 1] - cols[cx],rows[cy + 1] - rows[cy]);
    draw = new Rectangle (dCols[cx],dRows[cy],dCols[cx + 1] - dCols[cx],dRows[cy + 1] - dRows[cy]);
    mat.identity ();
    mat.a = draw.width / origin.width;
    mat.d = draw.height / origin.height;
    mat.tx = draw.x - origin.x * mat.a;
    mat.ty = draw.y - origin.y * mat.d;
    bmpData.draw (originalBitmap,mat,null,null,draw,true);
    cy ++;

   }

   cx ++;
  }

  return bmpData;
 }