touch panel support

[Vulpes Velox]

On Sat, 27 Mar 2010 00:17:06 +0300
Gleb Smirnoff <glebius at FreeBSD.org> wrote:

>   Hello,
> 
>   I've got a display with touch panel, and I'd like to get in
> working in FreeBSD. The touch panel is supported by NetBSD's
> uep(4). So far, I have written uep(4) for FreeBSD, that
> successfully reads and parses data from the USB touch panel device.
> 
>   And then I've got a problem. Our mouse subsystem is not ready for
> touch panels. Our mouse(4) protocol does not support mouse driver
> passing _absolute_ coordinates to the mouse(4) subsystem. It only
> expects a relative movement of the mouse.  But _absolute_
> coordinates are principal idea of any touch panel.
> 
>   The lesser problem is lack of generic support for touch panel
> calibration.
> 
>   Both of these problems are solved in NetBSD. They've got a
> wsmux(4) device, just like our kbdmux(4), but for mice. This mouse
> multiplexer can also understand absolute coordinates from
> underlying mice drivers. NetBSD also has a generic support for
> calibration of touch panels.
> 
>   What is the FreeBSD future way to go: port things for NetBSD?
> Write something different?

I am curious, what would it take to get to get it working in a
relative manner? I personally find this useful myself and generally
how I prefer to use my Wacom.
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