Switching mode with XMir

[Thomas Hellstrom]

Hi!

Is there any documentation on how modeswitching with XMir is done, and 
by that I mean
what mechanism is used to resize the root pixmap?

I assume the xf86Crtc system is completely bypassed?

Is SwitchMode and ValidMode ever called, or is XMir simply calling 
modifyPixmapHeader on the root pixmap
to switch modes?

Any insight would be appreciated.

Thanks,
Thomas Hellström, VMware