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是否存在离屏画布的最大尺寸?或者也许是从它开始写入/从中获取图像数据的一个点(以指数方式?)影响性能?
假设您正在编写等效的 Google 地图;你能用它渲染一张完整的纽约地图吗,比如 100.000 像素 x 100.000 像素?