[Openicc] ICC Profiles In X Specification

[Kai-Uwe Behrmann]

Am 06.10.07, 13:51 +0200 schrieb Sven Neumann:

> On Sat, 2007-10-06 at 09:14 +0200, Kai-Uwe Behrmann wrote:

> > > Can you point me to a document explaining this issue? As far as I know,
> > > the X server knows very well about the monitors in a Xinerama setup. To
> > > an application, the fact that there are multiple monitors is mostly
> > > transparent. But it can query the server for the monitor info.
> > 
> > $ man xorg.conf | grep Xinerama
> >          Option "Xinerama"  "boolean"
> 
> Sorry, but that doesn't answer my question. Your answers managed to
> confuse me quite a bit. So it would be nice if you could try to give a
> short explanation of the terminology as you are using it.

Xinerama can simple be switched off. This was intented to be a ultimative 
answere, as it shows the X11 logic. Otherwise Xinerama would be a must 
and this option would not exist at all.
 
> As far as I know there are two possible configurations for a dual-head X
> server. Either it is configured to have two screens. Then each screen
> has it's own root window on which the _ICC_PROFILE property can be set.
> Or it is a Xinerama setup. This means that there's one screen that spans
> two monitors. This is where the _ICC_PROFILE_X properties are used for.
> Is this not correct?

3 dual head configurations are possible:
o two screens
o one screen with Xinerama
o one screen without Xinerama

> > The multi head non Xinerama setup is handled by the ICC in X spec 0.2.
> 
> As far as I can see, the spec handles both the Xinerama and the
> non-Xinerama multi-head setups just fine.

... as well as the 3-rd one. 
 
kind regards
Kai-Uwe Behrmann
--
developing for colour management 
www.behrmann.name + www.oyranos.org + www.cinepaint.org