cocosjs 窗口内显示，窗口外不显示

var clip = new cc.LayerColor(cc.color(0, 0, 0), size.width,  size.height)

//var clip = new cc.Sprite(res.mask)

    clip.setAnchorPoint(0, 0)

    clip.setScale(1)

    clip.setPosition(0, 0)

    var mask = new cc.ClippingNode(clip)

    mask.setAnchorPoint(0, 0)

    this.addChild(mask, 12)

    this.sprs = this.sprites(gameData.layer09_data)

    this.sprs.forEach(function(item){

      mask.addChild(item, item.data.zindex)

    })

不规则图形裁剪后有黑色可以设置下面这个就可以去掉

layer.setBlendFunc(cc.SRC_ALPHA, cc.ONE)