VIP Gamma Corrector

Hi.

add/subtract I just meant if you are e.g. 2.22 gamma and want to add 0.1 for example then you would replace the values in the LUT:s based on calculations in non-linear space..otherwise you would not reach the correct result.

It might be hard to find IP that does degamma and regamma functions.. the first part exp2.22 is trivial with lut:s but coming back down is tricky. I ended up spending a lot of time getting it right and had to do it from scratch since no ip was available - at least at the time.