On 7/11/2015 09:13 , Jason Gerecke wrote:
On Thu, Nov 5, 2015 at 8:31 PM, Peter Hutterer <peter.hutte...@who-t.net> wrote:
This set adds support for graphics tablets to weston. It's not fully
complete, there are a couple of fixmes in it but the patchset is getting a
bit unwieldly. And there are some discussions on how to do things anyway.
Note: This needs the tablet-support branch from libinput to work. And it is
on top of Jonas's wip/wayland-protocols github branch (ff0452cea150c).
Tablet events are sent serially, terminated by a frame event. A toolkit
should accumulate them and then pass them on as one struct to the client. We
don't do that atm, it may be beyond libtoytoolkit's scope to really
integrate this properly.
The tablet has a separate cursor. That's a conscious decision since the
focus handling on tablets closer to an absolute touch screen than a mouse,
but unlike touch you usually want a cursor shape to indicate the precise
position.
The rest is fairly straightforward, though as said above, some details are
missing. Implementing this also showed that libinput needs a few extra
things added to it.
Cheers,
Peter
Having trouble getting this patchset to work properly for me. Of the
many times I've launched 'weston-tablet', only once did it work as
expected. The rest of the time I get no response and more often than
not a segfault when the pen leaves proximity (first backtrace). I've
also seen a segfault when simply trying to exit Weston with
CTRL+ALT+BACKSPACE (second backgrace).
Haven't had time to track down the cause; all I know at the moment is
that it seems the demo client's proximity_in_handler isn't actually
being called for some reason...
I've seen this bug a few times but don't know what the cause of it is
yet. I *think* it may be a libinput bug because the libinput event never
appears in the log. The problem is that once the bug happens it happens
repeatedly, but otherwise it's really hard to trigger. Unplugging the
tablet usually stops it but not always, but I haven't seen it since Wed
now so i'm struggling to reproduce it right now.
Also, fwiw so you don't have to handle the patchset itself:
http://github.com/whot/weston/tree/tablet-support-v3 (f4c8c77)
http://github.com/whot/wayland-protocols/tree/wip/wayland-tablet (8ded9b)
and libinput's tablet-support branch (ab6a409)
Cheers,
Peter
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