实现了画圆，线，矩形，多边形，颜色，镜像，删除，缩放。

To achieve the Circle, line, rectangle, polygon, color images, delete, zooming.

youdao

实现了画圆，线，矩形，多边形，颜色，镜像，删除，缩放。

To achieve the Circle, line, rectangle, polygon, color images, delete, zooming.

youdao