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  • 谷歌地图文字渲染原理

    谷歌地图的文字数据是后端渲染好,放到tile的pbf格式数据中了,后端渲染的是带颜色的文字。
    pbf数据拿过来之后一顿处理,从里面找出文字图像数据,下面的spritemapImage就是

    手动把这个数据拷出来,自己创建一个canvas之后长这模样,黄色是为了方面看加的背景色
    图像数据如下:其中width:99,height:27

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