Solution to cocould not start xvnc error when installing VNC in centos 6.3

When you install VNC in centos6.3, the following error occurs:

 
[Root @ localhost media] # service vncserver startstarting VNC Server: 1: Root warning: the first attempt to start xvnc failed, possibly because the fontcatalog is not properly configured. attempting to determine an appropriatefont path for this system and restart xvnc using that font path... cocould not start xvnc. /usr/bin/xvnc: Symbol lookup error:/usr/bin/xvnc: Undefined Symbol: pixman_composite_trapezoids/usr/bin/xvnc: Symbol lookup error:/usr/bin/xvnc: undefined Symbol: pixman_composite_trapezoids [failed]
 

It was hard to understand. Later I found that three more packages were needed to solve the problem.

Yum install pixman-devel libxfont
 

Make a record here and hope to help colleagues who have encountered the same problem.