认识
官网：https://xcb.freedesktop.org/
文档：https://xcb.freedesktop.org/tutorial/
仓库：https://github.com/corngood/libxcb
XCB is a library implementing the client side of the X11 display server protocol. XCB was designed as a smaller, modernized replacement for Xlib. The project was started in 2001 by Bart Massey and aims to replace Xlib.
参考
Wikipedia / XCB / https://en.wikipedia.org/wiki/XCB