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Date: Fri, 14 Jan 2011 17:31:55 +0100
From: Gerd Hoffmann <kraxel@redhat.com>
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Subject: Re: [Qemu-devel] paravirtual mouse/tablet
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To: Alexander Graf <agraf@suse.de>
Cc: spice-devel <spice-devel@lists.freedesktop.org>, Avi Kivity <avi@redhat.com>, "qemu-devel@nongnu.org Developers" <qemu-devel@nongnu.org>

   Hi,

>>> For a simple tablet pressure and index would just be 0.
>>
>> For a simple tablet pressure would be MAX and index would be 0. But yes, I like the idea :).
>
> 0 for non-presses of course :). Sorry

Right ;)

There are three cases:

(1) no pressure supported (i.e. your mouse moving around in the vnc
     window and qemu reporting this as tablet coordinates).
(2) just pen/finger present/not present supported.  pressure jumps
     between 0 and max (and we can make max == 1 in that case).
(3) real pressure measurement.

Will send out v3 shortly.

cheers,
   Gerd