Amber screen?

[Joshua Judson Rosen]

On 04/26/2016 11:08 AM, Dan Garthwaite wrote:
> I'm a fan of f.lux and redshift (the linux equiv).

Redshift is probably the thing to use with X11.

The docs on that say that "color temperature is changed by
setting appropriate gamma ramps", but it looks like it's actually using XCB
to scale *all of the points* on brightness-curves rather than just
adjusting the exponent used in normal gamma correction. I guess that
makes sense: you can't change your whitepoint by messing with the "xgamma"
command, because changing the gamma value just changes the exponentiation
of the values *between* a given blackpoint and whitepoint.

You could presumably also do this by defining a custom color-profile
using Argyll or something, but I have no idea how to do that.
It looks like Gnome Color Manager will let you tune your whitepoint
*after you calibrate*, but you need to hook up and ColorHug or other
calibration hardware first and actually get through the calibration step.

If anyone knows (or finds out) how to actually generate a custom color-profile
without doing calibration per se, I'd love to hear about it.


> Was he running vintage terminal emulator Cathode?
> http://www.secretgeometry.com/apps/cathode/
> 
> Looks like the glass screen of a  VT420 (in my experience) and friends.
> 
> https://www.jwz.org/images/cathode2.jpg
> 
> 
> On Tue, Apr 26, 2016 at 10:53 AM, Ryan Stack <4kbytes at zoho.com <mailto:4kbytes at zoho.com>> wrote:
> 
>     __
>     Yes that's probably f.lux, it has OS X version. Great app.
> 
>     Sent using Zoho Mail <https://www.zoho.com/mail/>
> 
> 
> 
>     ---- On Tue, 26 Apr 2016 07:45:21 -0700 Matt Minuti<matt.minuti at gmail.com <mailto:matt.minuti at gmail.com>> wrote ----
> 
>         My first thought was something like f.lux or twilight. Something to adjust the color temperature. Is that about right?
> 
>         On Apr 26, 2016 10:43 AM, "Ken D'Ambrosio" <ken at jots.org <mailto:ken at jots.org>> wrote:
> 
>             Okay, Stupid Geek Question Time.
> 
>             I'm at the Openstack Summit, and the room is awful dark.  So I've got my
>             screen's backlighting down to minimum.  But someone up a few rows --
>             probably on a Mac, the heathen -- has his screen in WYSE/amber mode, as
>             far as I can tell.  (Well, okay, so the stock WYSE didn't support
>             graphics.  Work with me.)  Anyway, that's really cool -- both from the
>             "wow, I love amber WYSE screens" perspective, and from a "let's not bug
>             the people sitting behind me" perspective.  I've done some googling, and
>             haven't found anything of particular note, but I'm thinking if I could
>             somehow modify the color palette to just choose amber, I'd be in decent
>             shape.
> 
>             Anyone have any ideas on how to make this happen?  Or should I give up
>             now and pay more attention to the keynote speaker?


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