test() {//这是path2d裁剪
    const that = this,
      path = that.can.createPath2D()
    that.ctx.save()
    path.moveTo(30, 30);
    path.lineTo(120, 20);
    path.lineTo(200, 80);
    path.lineTo(110, 150);
    that.ctx.clearRect(0, 0, that.windowWidth, that.windowWidth)
    that.ctx.clip(path)
    that.ctx.drawImage(that.img, 0, 0, that.windowWidth, that.windowWidth)
    that.ctx.restore()
  }

test1() {//这是路径裁剪
    const that = this
    that.ctx.save()
    that.ctx.beginPath()
    that.ctx.moveTo(20, 20);
    that.ctx.lineTo(200, 80);
    that.ctx.lineTo(110, 150);
    that.ctx.clearRect(0, 0, that.windowWidth, that.windowWidth)
    that.ctx.clip()
    that.ctx.drawImage(that.img, 0, 0, that.windowWidth, that.windowWidth)
    that.ctx.restore()
  }

这是模拟器中，点击裁剪后会这样

path2d和直接使用lineTo

真机上却无效，但真机上不使用path2D直接使用lineTo却没问题

但使用路径之后再用path2D似乎还有save和restore无效的情况，具体请使用代码片段尝试

真机：红米k30pro;安卓11;miui12.5.2稳定版