HarmonyOS pixelmap深拷贝问题

static async copyPixelMap(pm: PixelMap): Promise<PixelMap | null> { 
  const imageInfo: image.ImageInfo = await pm.getImageInfo(); 
  const buffer: ArrayBuffer = new ArrayBuffer(pm.getPixelBytesNumber()); 
  await pm.readPixelsToBuffer(buffer); 
  const opts: image.InitializationOptions = { 
    editable: true, 
    pixelFormat: image.PixelMapFormat.RGBA_8888,//这里用RGBA_8888效果一样 
    size: { height: imageInfo.size.height, width: imageInfo.size.width } 
  }; 
  return await image.createPixelMap(buffer, opts); 
}
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