multi-touch-dev team mailing list archive

[Henrik Sandklef <hesa@xxxxxxxxxxxx>]

On 10/22/2010 04:29 AM, Chase Douglas wrote:
> On Fri, 2010-10-22 at 07:42 +1000, Peter Hutterer wrote:
> > On Thu, Oct 21, 2010 at 12:30:37PM -0400, Chase Douglas wrote:
> > > On Thu, 2010-10-21 at 15:46 +0200, Henrik Sandklef wrote:
> > > > The new version of GNU Xnee should have support for MT:
> > > >
> > > >      http://ftp.gnu.org/gnu/xnee/xnee-3.07.tar.gz
> > > >      http://ftp.gnu.org/gnu/xnee/xnee-3.07.tar.gz.sig
> > >
> > > Cool!
> > >
> > > Can you describe how this differs from evtest-capture recording as Peter
> > > wrote here:
> > >
> > > http://who-t.blogspot.com/2009/11/evtest-capture-and-replaying-events.html
> >
> > it's on a different level. evtest-capture records kernel events and replays
> > them through uinput.
> >
> > xnee records X events (through the RECORD extension) and then replays them
> > through (I think the Xtest extension). No kernel involved.
>
> That's what I had thought as well, which confused me. There's no MT
> support in X yet, so how does Xnee now have MT support?

Sorry, my bad:

  Xnee can record XI events


> We (Canonical) haven't had a chance yet to build a test harness for our
> utouch stack, but it's going to be one of my main tasks for the next
> couple weeks. I'll be looking into Xnee, evtest-capture, and the test
> tool that Henrik has been hacking up.


> If Xnee is at the X level it may
> be too high up for what we want.

Xnee is at the X level. It records XI events (and can replay them either 
to X (using XTest, as Peter said) or "beta beta beta" to the kernel 
using swinput (Linux module)).

So if some X/kernel code, for example a gesture recognition extension, 
"steals" some possible events (e.g MotionNotify) at the kernel level 
before creation, Xnee will only record the events created by that code.

.... so I guess Xnee will be pretty useless here

>  We need something we can feed events
> through as though they came from a real device, with all the quirks that
> a real device may offer, like ghosted or dropped touches.
>
> -- Chase