用URLLoader以二进制的方式加载外部图片,获得URLLoader.data的ByteArray数据,再用Loader去加载,这时Loader.content就是一个bitmap了。
package {
import flash.display.Bitmap;
import flash.display.Loader;
import flash.display.MovieClip;
import flash.display.Sprite;
import flash.events.Event;
import flash.filters.ConvolutionFilter;
import flash.net.URLLoader;
import flash.net.URLRequest;
import flash.net.URLLoaderDataFormat;
import flash.utils.ByteArray;
   
public class Main extends Sprite{
private var loader:URLLoader;
public function Main():void
{
  loadImage("image.jpg");
}
private function loadImage(_path:String ):void
{
  loader = new URLLoader;
  loader.dataFormat=URLLoaderDataFormat.BINARY ;
  loader.addEventListener (Event.COMPLETE , onImageLoaded);
      loader.load(new URLRequest (_path));
}
private function onImageLoaded(e:Event):void
{
  var _ba:ByteArray = e.target.data as ByteArray;
  var _l:Loader = new Loader;
  _l.contentLoaderInfo.addEventListener (Event.COMPLETE, onBytesLoaded);
  _l.loadBytes(_ba);
 
  loader.removeEventListener (Event.COMPLETE , onImageLoaded);
  loader = null;
}
                
private function onBytesLoaded(e:Event):void 
{
  var _bitmap:Bitmap = e.target.content as Bitmap;
  trace(_bitmap.width, _bitmap.height );
  addChild (_bitmap );
 
  e.target.loader.contentLoaderInfo.removeEventListener (Event.COMPLETE, onBytesLoaded);
}                
}
}

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