png解码
https://www.cnblogs.com/xiaoxiaoboke/archive/2012/02/13/2349770.html
bmp
https://www.cnblogs.com/wdy0505/p/10154795.html
RGB的三种格式信息：
https://blog.csdn.net/byhook/article/details/84262330
解码：
https://www.cnblogs.com/weiyikang/p/6828647.html
https://blog.csdn.net/wang93IT/article/details/85003730
GIF:
https://www.cnblogs.com/xiaoxiaoboke/archive/2012/02/13/2349770.html
https://blog.csdn.net/hgl868/article/details/7444428
png内存读写：
http://www.libpng.org/pub/png/book/chapter14.html
链接：https://pan.baidu.com/s/1rNYme0fbqgrfNv0poTj74A
提取码：glmb
