如果你不知道该怎么用的话，就把gerber文件放到dist/gerbers里面，然后运行dist/gerber2png.exe就可以了，运行结束后在dist/output里面会生成对应的PNG文件
gerber文件测试了，eagle自带的CAM和嘉立创的CAM
我发现我的另外一个电脑上那个exe文件会报毒。如果不放心的话可以自己用python跑也行。
已知问题： 我发现导出的丝印层是半透明的。。。貌似是库本身的bug，自己在PS里改一下吧。。。
If you don't know how to use it, just copy gerber files into dist/gerbers,then run dist/gerber2png.exe. You will find PNG files in dis/output
It seemed that windows defender will identified the exe file as virus, you can run the gerber2png.py to gererate the png files.
known issue： silkscreen will be translucent，it seemed caused by library.