Apply coordinate transformation matrix for multi-head touchscreen
peter.hutterer at who-t.net
Mon Jun 13 20:43:07 PDT 2011
On Mon, Jun 13, 2011 at 02:50:10PM +0000, Scott Jaffa wrote:
> I am working to get multiple touchscreen support working.
> Both devices currently come up, however I need to apply a coordinate transformation matrix to the input, as documented here:
> This works fine from the command line, however I have a pair of devices.
> The touchscreens are uniquely identified via usb port with udev, so I have hardcoded /dev/input/ts1 and /dev/input/ts2 devices.
> However, I cannot script the xinput command, as I do not know which devices are which from the xinput list output. Each touchscreen reports two device ids:
> ⎡ Virtual core pointer id=2 [master pointer (3)]
> ⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)]
> ⎜ ↳ stylus id=6 [slave pointer (2)]
> ⎜ ↳ eraser id=7 [slave pointer (2)]
> ⎜ ↳ TPPS/2 IBM TrackPoint id=14 [slave pointer (2)]
> ⎜ ↳ HID 0430:0100 id=11 [slave pointer (2)]
> ⎜ ↳ TS Device id=12 [slave pointer (2)]
> ⎜ ↳ TS Device id=13 [slave pointer (2)]
> ⎜ ↳ TS Device id=14 [slave pointer (2)]
> ⎜ ↳ TS Device id=15 [slave pointer (2)]
> Is there a way to define the matrix in the xorg.conf file,
> or a way to match the ids above to their /dev/input device or USB port?
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