[GSoC] KWin colour management

Kai-Uwe Behrmann ku.b at gmx.de
Fri Mar 23 05:27:52 GMT 2012

Am 22.03.12, 22:49 +0100 schrieb Thomas L├╝bking:
> Am 22.03.2012, 19:20 Uhr, schrieb Kai-Uwe Behrmann <ku.b at gmx.de>:
>> I was tould by the graphics community to keep the X Color Management spec
>> backward compatible with the ICC Profile in X spec, so we did. Thus old
>> style applications see a sRGB profile through the ICC Profile in X spec,
>> and they continue to work by converting to sRGB.
> Sorry again, but does that actually mean that if I have a WG screen and an 
> application which does not support the opt-out protocol or bought into a 
> competing* system, it will be reduced to sRGB while the application and the

Where would be a competing system on Linux?

> screen actually could do WG ... but the delete icon in dolphin looks correct?

That is correctly described and expected behaviour as developers said.

> Next question: do you have approached the Wayland project on this?
> In case, what do they say?

We discussed that with Wayland people and the last spec revision was 
adapted to meet their concerns. So the transition from X Color 
Management to W(ayland) Color Management should be relativele smooth.


> *semi OT sidenote:
> This is btw. sth. I do not like at all.
> Xorg and fdo do not have the market share -esp. in that market- to afford two 
> competing color management systems.
> I have no idea about the technical, conceptual and maybe religious 
> differences, but would suggest to iron that out by all means if you ever want 
> usable CM on this Architecture.

What other substantial proposals or discussions do you have in mind?
As far as I can see there was no publically discussed *competing* concept 
of substance ever brought to the attention of the graphics community.
We only have read some nebulous and non technical statements on the typical 
level of marketing.

OpenICC [1] is the fd.o place to discuss such CM stuff or at least the 
Xorg email list. In both I am active. I will surely continue to present 
and discuss the idea with users and developers in various events.

kind regards
Kai-Uwe Behrmann

[1] http://www.freedesktop.org/wiki/OpenIcc/Events/Fosdem/2012

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