Howto determine screen geometry?

[Stef Bon]

  Hi,

I'm working on a MultiSeat sollution, and has a video card with two 
monitors connected.

Now my setup is simular to:

http://beforeafterx.blogspot.com/2011/02/multiseat-setup.html

Now as you can read here, on every screen there is a Xephyr running.

The location and the size of the window Xephyr is running on is set in a 
configuration file.

Isn't it possible to just get that information from the Xserver??

like

xgetscreeninfo -display :0.0

and

xgetscreeninfo -display :0:1

which gives the position like

1920x1080+0+0
and
1920x1080+1920+0


This makes it very easy, since the configuration is not necessary at 
all, it's redundant. The info is already present in the setup (xorg.conf 
file) how the screens are configured. (size and position)

Stef