RGB filters for different forms of color blindness

Question

My father is color blind and given that I work in games where the visuals are important, I've always wanted to write a filter for screen shots (or even some type of shader) that emulated different forms of color blindness.

I've seen plenty of references but never have been able to track down algorithms.

Any algorithms would be appreciated.

Answer 1

I came across Color Oracle and thought it might help. Here is the short description:

Color Oracle is a colorblindness simulator for Windows, Mac and Linux. It takes the guesswork out of designing for color blindness by showing you in real time what people with common color vision impairments will see.