[OpenICC] X and colour management

[Kai-Uwe Behrmann]

Am 08.02.05, 12:37 -0600 schrieb Bob Friesenhahn:

> On Tue, 8 Feb 2005, Kai-Uwe Behrmann wrote:
> > 
> > Hardware information API in Xlib:
> > 
> > Reading out the EDID information (as proposed by Egbert Eich) and
> > interprete it regarding model information, seems possible. I dont know
> > how
> > stable this is throughout different implementations.
> > I found no way, other than looking directly in the X config file, to find
> > out the model name of the grafic card + ID number over Xlib. An
> > dedicated API for this informations would be highly welcome.
> 
> Is it really necessary to know the detailed information for the graphics card
> and display ID?  It seems to me that what is needed is a way to accurately

My experience with laptops is stick an external monitor in and it should 
run. As I understand You , the MAC adress is terminal specific. Ok thats 
fine for static configurations. For the need of most flexibility, and 
laptops are dayly experience, I expect there would be no way around some 
kind of hardware identification.

> identify a given display device so that the correct profile is used.  For
> example, the ethernet "IEEE" 48-bit MAC address could be used to uniquely
> identify the host where the X11 server runs (could be a dedicated X11
> terminal), and a system-specific means could be used to produce a number which
> uniquely identifies the physical display device on that host (could be the
> existing X11 display ID).
> 
> There should be support (somehow) for systems where a single X11 display ID is
> split across multiple display devices.  This seems quite difficult.  Perhaps
> this situation could be intentionally ignored in the interest of making
> progress.

Ah, it is the Xinerama case? Ok there is anyway an problem for 
applications. Currently only X or an close tight library would be able to 
handle diffent portions of an window corresponding to the belonging 
screen. Watching an video across LCD borders is not that fun. But maybe 
the device borders become thin and then it could be fine to have that 
enabling logic ready.

> Bob
> ======================================
> Bob Friesenhahn
> bfriesen at simple.dallas.tx.us
> http://www.simplesystems.org/users/bfriesen

regards
Kai-Uwe Behrmann
                                + development for color management 
                                + imaging / panoramas
                                + email: ku.b at gmx.de
                                + CMS proposal <www.behrmann.name>