使用createJS时如何避免弄脏画布？

Question

我看到三个地方表明我想要一个crossOrigin图像：对createjs.LoadQueue的第三个参数（文档中已弃用）使用true，设置loadItem.crossOrigin属性（分配“ Anonymous”或使用LoadItem.set（{ .. crossOrigin：true ..}），以及LoadQueue getResult返回的图像的crossOrigin属性（始终看起来为null），我找不到设置的组合来避免画布变脏。

Answer 1

From my tests, CORS works fine.

Here is a quick sample using 0.6.2 from the CDN.

var queue = new createjs.LoadQueue(false);
queue.on("complete", handleComplete);
queue.loadFile({src:"http://playpen.createjs.com/CORS/awesome.jpg", crossOrigin:true, id:"image"});
function handleComplete(event) {
    var img = queue.getResult("image");
    console.log(img.crossOrigin); // anonymous
}

You can see it working in this demo, where the image is added to a bitmap on stage, and then a click listener added:

http://jsfiddle.net/od727g2q/

Here is a variation using the (deprecated, but still functional) argument on LoadQueue constructor: http://jsfiddle.net/od727g2q/1/

Just for sanity, here is a version using the latest NEXT in GitHub: http://jsfiddle.net/od727g2q/2/

Cheers.