Re: [Gimp-developer] Attempt to summarize the discussion of my examples of what doesn't work in unbounded sRGB

[Teo Mazars <mazarst ensimag grenoble-inp fr>]

----- Mail original -----
> So I was wrong about Channel Mixer desaturation not working in
> unbounded
> mode sRGB. Desaturation using Channel Mixer does give "close to the
> same
> results" as the source color space in unbounded mode sRGB, but *not*
> in
> perceptually uniform sRGB, rather *only* in linear light sRGB.
>
> Similar issues are easy to demonstrate with Levels upper and lower
> sliders, Gradients, Invert. These really need to be linear light
> operations.
>
> Is there a list of the operations that don't currently use linear
> light?

Yes, grep for "R'" or "Y'" in the operation directory. But... are you really saying that Gradient should be 
implemented using a non-perceptual color space?

I think gradient is a good simple example. How this operation should be implemented exactly? We want people 
to be able to draw perceptually linear gradient right? How do we achieve that, both from UI and GEGL point of 
view.