Re: how to design a tablet driver?

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Peter Ross wrote:
> Hi Chuck,
> 
> On Wed, 5 Mar 2008, Chuck Robey wrote:

BTW, I still do need that discussion of USB graphic tablets, so please
don;'t let that little hijacking (I'm sure done unintentionally) side track
you.  I need some pointers on interfacing things that aren't relative in
nature (as mice are), and this might be quite interesting (least, I do hope
so).

> 
>> I'm suggesting this because I'm very, very confused as to how I would
>> figure out what the screen size is for a vty.  If I gotta do a absolute gig
>> on a bty, then I gotta find some way to ask the size of the cry, and get me
>> driver in the list of those to be notified if the size of a vty changes.
> 
> I am not really an expert in this area.
> 
> For personal interest I looked yesterday into the libvgl (e.g. 
> VGLMouseStatus(1) and the other functions mentioned there). It seems to 
> cooperate with syscons including mouse support.
> 
> Somehow (for me "by magic" - I do not know how) Xorg seems to recognize a 
> system mouse that is configured for the terminal. If someone explains this 
> magic it may be helpful for you.
> 
> My interest came from another angle. I tried to find out whether FreeBSD's 
> infrastructure does not support displaying of more than one VTs at the 
> time, as someone claimed. I would like to configure my laptop to use the 
> small internal monitor as a text console while the external monitor is 
> serving X.
> 
> Regards
> Peter
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