从PIXI.js获取DataURI

Question

我需要画布的当前渲染图像。 我在PIXI.js中需要哪种方法？

请参见最后一个函数“ addRender（）”

注意： “ HTMLCanvasElement，CanvasRenderingContext2D或DataURI格式的字符串”

    let Application = PIXI.Application,
        Container = PIXI.Container,
        loader = PIXI.loader,
        resources = PIXI.loader.resources,
        TextureCache = PIXI.utils.TextureCache,
        Texture = PIXI.BaseTexture,
        Sprite = PIXI.Sprite;

    //Create a Pixi Application
    let app = new Application({ 
        width: 256, 
        height: 256,                       
        antialiasing: true, 
        transparent: false, 
        resolution: 1
      }
    );

    $('#canvas').html(app.view);

    loader.add("images/cat.png").load(setup);
    loader.onComplete.add(() => {});

    //Define any variables that are used in more than one function
    let cat;

    function setup() {

      cat = new Sprite(resources["images/cat.png"].texture);
      cat.y = 96; 
      app.stage.addChild(cat);
      app.ticker.add(delta => gameLoop(delta));
    }

    function gameLoop(delta){

      cat.x += 1;
      cat.y += 1;
      addRender( cat)
    }