Software for calibrating a touch screen

[Clemens Kirchgatterer]

On Wed, 2008-10-01 at 13:56 +0200, Søren Hauberg wrote:

> I've found two calibration programs online. One came without a
> license, making it non-free software, and the other one had a
> non-so-nice gui, where you had to move your stylus all the way up the
> corners of the screen (this one I couldn't present to a custumor).
> These programs seems to have the problem that they require direct
> access to the touchscreen device, which means X can't have access to
> it (at least not when using evdev).

i work around this by writing raw touch coordinates to a shared memory
segment from within the X driver. the calibration program reads this
memory segment and does its thing without direct access to the hardware.
maybe not the cleanest way to do it, but i couldn't come up with a nicer
idea.

clemens