https://sourceforge.net/projects/libpng/files/libpng16/1.6.37/
http://www.ijg.org/files/
https://github.com/libjpeg-turbo/libjpeg-turbo/tags
https://github.com/dtschump/CImg
https://github.com/Yalantis/uCrop
图片裁剪,图片压缩
https://sourceforge.net/projects/libpng/files/libpng16/1.6.37/
http://www.ijg.org/files/
https://github.com/libjpeg-turbo/libjpeg-turbo/tags
https://github.com/dtschump/CImg
https://github.com/Yalantis/uCrop