载入图像如何转换成BitmapData

代码如下：

var url:String="1.jpg";

var request:URLRequest=new URLRequest(url);

var bmp:Bitmap;

var bmpData:BitmapData = new BitmapData(100,100);

var loader:Loader=new Loader();

loader.contentLoaderInfo.addEventListener(Event.COMPLETE, completeHandler);

loader.load(request);

function completeHandler(event:Event) {

var loader:Loader=Loader(event.target.loader);

bmp = Bitmap(loader.content);

bmpData.draw(bmp);

addChild(bmp);

}