Apply coordinate transformation matrix for multi-head touchscreen
sjaffa at harmonia.com
Mon Jun 13 07:50:10 PDT 2011
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?
More information about the xorg