{
  "kind": "合成输入，非硬件实测",
  "topic": "LED 异形屏的挖空区域怎样交给内容方：做一份像素掩膜",
  "data": {
    "canvas": [
      1024,
      512
    ],
    "upper_height": 256,
    "lower_visible_width": 512,
    "hole": {
      "x": 640,
      "y": 64,
      "w": 256,
      "h": 128
    }
  }
}