public static MumuTools GetInstance()
 {
     if (instance == null)
     {
         instance = new MumuTools();
     }
     return(instance);
 }
        private Size viewportSize; //有缓存的话想更新这个数据必须重启

        public Size GetViewportSize()
        {
            if (bGotViewportSize)
            {
                return(viewportSize); //缓存
            }
            var viewportRect = MumuTools.GetInstance().GetMumuViewportRect();

            viewportSize     = new Size(viewportRect.Width, viewportRect.Height);
            bGotViewportSize = true; //缓存
            return(viewportSize);
        }