[]动画添加了 滤镜,drawcall 次数暴增，这是为啥？？？？

        var url = App.animManager.getUrl(id);

        this.ani.loadAtlas(url,null,id);

        this.ani.alpha = 0.5;

        this.ani.play(0, true);

        

        var grayMat = [

            0, 0, 0, 0, 0,

            0, 0, 0, 0, 0,

            0, 0, 0, 0, 0,

            0, 0, 0, 1, 0

        ];



        //创建一个颜色滤镜对象，灰图

        var scaleFilter = new Laya.ColorFilter(grayMat);

        this.ani.filters = [scaleFilter];