Re: Default colors vs. gamma

[Adrian Robert]

On Oct 13, 2004, at 8:57 AM, Alexander Malmberg wrote:
> > > as asked in #GNUstep to provide screenshots of this, so:
> > >
> > > http://w1.423.telia.com/~u42308495/alex/gamma_colors.png
> [snip]
> > The gamma 1.0 shot looks just like I remember the NeXT (OK, it has 
> > been a few years, but I'm pretty sure), yet I do not have any gamma 
> > calibration turned on in my X server, and using test images it seems 
> > like my setup has a gamma of about 2.
>
> Just to be clear, you mean that the TextEdit instance on the right 
> looks like NeXT, and the instance on the left is too bright?

Yes.  But given the below, and some web investigations of my own, I 
think probably my earlier impressions were the result of the aging NeXT 
monitors..  ;-)


> > Is it possible that the GNUstep
> > system color settings were set by someone eyeballing things on a 
> > non-gamma-corrected system, instead of being numerically copied from 
> > a NeXT?
>
> Well, I asked Matt Rice, and he compared OPENSTEP (no special 
> settings) and GNUstep (on an uncalibrated display) side-by-side and 
> concluded that GNUstep was clearly darker than OPENSTEP. Adjusting 
> gamma on the GNUstep system to around 2.2 made them similar. He also 
> confirmed that our colors have the same absolute values as the 
> OPENSTEP colors.