Export bitmap from MovieClip (DisplayObject)

public function createPreview(obj:*):BitmapData { var resultShirt:BitmapData = new BitmapData(obj.width, obj.height, false, 0xffffff); var m:Matrix = new Matrix(); var s:Number = resultShirt.height / obj.width; obj.mask = null; m.translate(-obj.width / 2, -obj.height / 2); m.translate(resultShirt.width /