diff options
| author | Peter Hutterer <peter.hutterer@who-t.net> | 2016-10-24 14:41:51 +1000 |
|---|---|---|
| committer | Peter Hutterer <peter.hutterer@who-t.net> | 2017-01-04 09:57:57 +1000 |
| commit | 5d0470738125243c98f7a8cc40d62f53604a8051 (patch) | |
| tree | a829cea9a16188d2c9315c9d0b95ed7919d3fbc2 /include | |
| parent | f65a5c50224efc34414f44c86700e15392b7039b (diff) | |
Implement stylus pressure curve support
Takes a 4-point cubic bezier curve as input and maps the pressure coordinates
to the values outlined by this curve. This is an extension of the current
implementation in the xf86-input-wacom driver which only allows the two center
control points to be modified.
Over the years a few users have noted that the wacom driver's pressure curve
makes it impossible to cap the pressure at a given value. Given our bezier
implementation here, it's effectively a freebie to add configurability of the
first and last control points. We do require all control points' x coordinates
to be in ascending order.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Diffstat (limited to 'include')
| -rw-r--r-- | include/libinput-properties.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/libinput-properties.h b/include/libinput-properties.h index 8c6942d..f76500f 100644 --- a/include/libinput-properties.h +++ b/include/libinput-properties.h @@ -183,4 +183,11 @@ /* Device rotation: FLOAT, 1 value, 32 bit, read-only */ #define LIBINPUT_PROP_ROTATION_ANGLE_DEFAULT "libinput Rotation Angle Default" +/* Tablet tool pressure curve: float, 8 values, 32 bit + * Value range is [0.0, 1.0], the values specify the x/y of the four + * control points for a cubic bezier curve. + * Default value: 0.0 0.0 0.0 0.0 1.0 1.0 1.0 1.0 + */ +#define LIBINPUT_PROP_TABLET_TOOL_PRESSURECURVE "libinput Tablet Tool Pressurecurve" + #endif /* _LIBINPUT_PROPERTIES_H_ */ |