createjs 入门之EaselJs 绘制图片Bitmap

    var canvas=document.getElementById('demoCanvas');
    canvas.width=window.innerWidth;
    canvas.height=window.innerHeight;
    var stage=new createjs.Stage('demoCanvas');
    var container=new createjs.Container();//绘制外部容器
    stage.addChild(container);
    //加载图片
    var image=new Image();
    image.src="img/Lighthouse.jpg";
    image.onload=handlerImageLoad;

    function handlerImageLoad(event){
      var bitmap=new createjs.Bitmap(event.target);
      bitmap.x=canvas.width-bitmap.getBounds().wdith>>1;
      bitmap.y=canvas.height-bitmap.getBounds().height>>1;

      container.addChild(bitmap);
      stage.update();
    }