diff options
| author | Philippe Coval <philippe.coval@osg.samsung.com> | 2017-06-17 01:13:28 +0200 |
|---|---|---|
| committer | Peter Hutterer <peter.hutterer@who-t.net> | 2017-06-20 16:43:49 +1000 |
| commit | 4cf9f8bee19104d60031dd040f5758a10ed805b5 (patch) | |
| tree | 8be526f0e0b8557498c91c6e330c555638134dac /doc | |
| parent | d2054c8188681868c77f731ba3641ecbe5b775dc (diff) | |
doc: Fix mistake in Matrix example to relect only X along Y axis
On some devices, X coordinate is not working well, like if it is swapped:
click on right, pointer appear on left and vice versa.
To sort this issue, coordinates should be reflected on Y axis:
- new X position is changed (width is subtracted by X position)
- Y is unchanged (it was wrongly set to X)
In landscape (or portrait) mode:
[ x ]
[ y ]
[ 1 ]
* =
[ -1 0 1 ] [ x' ] = -x + 0*y + 1*width
[ 0 1 0 ] [ y' ] = 0*x + 1*y + 0*height
[ 0 0 1 ] [ 1 ]
This was verified using this touch screen (usb="0eef:0001")
E: ID_VENDOR=eGalax_Inc.
E: ID_VENDOR_ENC=eGalax\x20Inc.
E: ID_VENDOR_ID=0eef
https://bugs.freedesktop.org/show_bug.cgi?id=101474
Signed-off-by: Philippe Coval <philippe.coval@osg.samsung.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/device-configuration-via-udev.dox | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/doc/device-configuration-via-udev.dox b/doc/device-configuration-via-udev.dox index cacbbf1..4faab93 100644 --- a/doc/device-configuration-via-udev.dox +++ b/doc/device-configuration-via-udev.dox @@ -24,7 +24,7 @@ Example values are: ENV{LIBINPUT_CALIBRATION_MATRIX}="0 -1 1 1 0 0" # 90 degree clockwise ENV{LIBINPUT_CALIBRATION_MATRIX}="-1 0 1 0 -1 1" # 180 degree clockwise ENV{LIBINPUT_CALIBRATION_MATRIX}="0 1 0 -1 0 1" # 270 degree clockwise - ENV{LIBINPUT_CALIBRATION_MATRIX}="-1 0 1 1 0 0" # reflect along y axis + ENV{LIBINPUT_CALIBRATION_MATRIX}="-1 0 1 0 1 0" # reflect along y axis @endcode </dd> <dt>LIBINPUT_DEVICE_GROUP</dt> |