scaling watermark only 31kb size. support chinese

给图片加水印。只有31k大小，http://www.iknowoleg.com/

水印可以设置在两个位置出现，对角线和水平线上：Diagonal and horizontal

https://weibo.com/1256982025/IluEqoVbi?from=page_1005051256982025_profile&wvr=6&mod=weibotime&type=comment#_rnd1576738720422