/**
         * 保存纹理图片相关信息
         */
        public string SaveTextureFormat(Texture2D tex, string texPath, string matPath, bool closemipmap = false, string ext = "png", bool normal = false)
        {
            string name = PathHelper.CheckFileName(tex.name + ".image.json");

            MyJson_Tree textureItem = new MyJson_Tree();
            var         fileName    = texPath.Substring(0, texPath.LastIndexOf(".") + 1) + ext;

            textureItem.SetString("name", PathHelper.CheckFileName(texPath));
            textureItem.SetEnum("filterMode", tex.filterMode, true);
            textureItem.SetEnum("wrap", tex.wrapMode, true);
            textureItem.SetBool("mipmap", !closemipmap && tex.mipmapCount > 1);

            if (tex.anisoLevel > 1)
            {
                textureItem.SetNumber("anisotropy", tex.anisoLevel);
            }

            if (tex.format == TextureFormat.Alpha8)
            {
                textureItem.SetString("format", "Gray");
            }
            else if (ext == "jpg" ||
                     tex.format == TextureFormat.RGB24 ||
                     tex.format == TextureFormat.PVRTC_RGB2 ||
                     tex.format == TextureFormat.PVRTC_RGB4 ||
                     tex.format == TextureFormat.RGB565 ||
                     tex.format == TextureFormat.ETC_RGB4 ||
                     tex.format == TextureFormat.ATC_RGB4 ||
                     tex.format == TextureFormat.ETC2_RGB ||
                     tex.format == TextureFormat.ASTC_RGB_4x4 ||
                     tex.format == TextureFormat.ASTC_RGB_5x5 ||
                     tex.format == TextureFormat.ASTC_RGB_6x6 ||
                     tex.format == TextureFormat.ASTC_RGB_8x8 ||
                     tex.format == TextureFormat.ASTC_RGB_10x10 ||
                     tex.format == TextureFormat.ASTC_RGB_12x12
                     )
            {
                textureItem.SetString("format", "RGB");
            }

            textureItem.SetInt("version", 2);

            //得到.imgdesc.json数据,并保存到bufs中
            System.Text.StringBuilder sb = new System.Text.StringBuilder();
            textureItem.CovertToStringWithFormat(sb, 4);
            byte[] bs = System.Text.Encoding.UTF8.GetBytes(sb.ToString());
            //相对路径
            var imgdescPath = texPath.Substring(0, texPath.LastIndexOf("/") + 1) + name;

            this.AddFileBuffer(imgdescPath, bs);

            return(imgdescPath);
        }