[PATCH weston v2 2/2] evdev: Improve touchpad support and add motion filters

Jonas Ådahl jadahl at gmail.com
Thu May 17 07:39:34 PDT 2012

On Thu, May 17, 2012 at 4:20 PM, Chase Douglas
<chase.douglas at canonical.com> wrote:
> On 05/17/2012 03:18 AM, Jonas Ådahl wrote:
>> Touchpad related code has been rewritten and moved to its own file
>> accessed by evdev via the dispatch interface.
>> The various functionality implemented are anti-jitter (don't jumping
>> around), smoother motions, touch detection, pointer acceleration and
>> some more.
>> Pointer acceleration is implemented as one generic part, and one touch
>> specific part (a profile).
>> Some ideas and magic numbers comes from xserver and
>> xf86-input-synaptics.
>> Signed-off-by: Jonas Ådahl <jadahl at gmail.com>
> I know I don't have much (any?) clout in wayland, but I feel strongly
> enough about moving this logic to a separate library that I'm going to
> NACK this. We need to resolve this problem from the beginning, or else
> we will end up in some of the same messes we have in the X server.

Have you experimented with having pointer acceleration completely
server side defining a versatile enough input protocol so that the
features you wish to implement will still be possible? What would be


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