[HELP] Scripting Post Processing Settings?

Hi guys,

I was just wondering if it was possible to script post processing, this means like Depth of Field, and to go a little off the boundaries some gradient effects (that of course I will be making). If it is possible, please explain, cause I’ve been trying to figure this out. I have seen http://wiki.garrysmod.com/page/Misc/Shaders/g_blurx but I don’t know how to implement that. Any help will be greatly appreciated, thank you.