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Add support for custom pointer acceleration

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Adds new properties and xorg.conf entries for setting the acceleration
function's points and step.

`AccelProfile` option can now accept `custom` value.

Add 4 new options which only apply when `AccelProfile` is `custom`:

- Add `AccelPointsFallback` option for setting the points of the
  Fallback acceleration function. Points values are represented by a
  space-separated list, e.g. "0.0 1.0 2.4 2.5".

- Add `AccelStepFallback` option for setting the step of the Fallback
  acceleration function. When a step of 0.0 is provided,
  libinput default Fallback acceleration function is used.

- Add `AccelPointsMotion` and `AccelStepMotion` options, which are
  equivalent to `AccelPointsFallback` and `AccelStepFallback` options,
  but apply to the Motion acceleration function.

See libinput documentation for a detailed explanation of custom
pointer acceleration.
This commit is contained in:
Peter Hutterer
2022-11-24 13:50:27 +10:00
committed by Yinon Burgansky
parent ca02afd8d2
commit f94a8edb0e
9 changed files with 1186 additions and 20 deletions
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19
man/libinput.man
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@@ -45,13 +45,28 @@ are supported:
Sets the pointer acceleration profile to the given profile. Permitted values
are
.BI adaptive,
.BI flat.
.BI flat,
.BI custom.
Not all devices support this option or all profiles. If a profile is
unsupported, the default profile for this device is used. For a description
on the profiles and their behavior, see the libinput documentation.
.TP 7
.BI "Option \*qAccelSpeed\*q \*q" float \*q
Sets the pointer acceleration speed within the range [-1, 1]
Sets the pointer acceleration speed within the range [-1, 1].
This only applies to the flat or adaptive profile.
.BI "Option \*AccelPointsFallback\*q \*q" string \*q
Sets the points of the Fallback acceleration function, (see the libinput documentation).
The string must be a space-separated list of floating point non-negative numbers, e.g.
"0.0 1.0 2.4 2.5".
This only applies to the custom profile.
.BI "Option \*AccelStepFallback\*q \*q" float \*q
Sets the step between the points of the Fallback acceleration function, (see the libinput documentation).
When a step of 0.0 is provided, libinput's default Fallback acceleration function is used.
This only applies to the custom profile.
.BI "Option \*AccelPointsMotion\*q \*q" string \*q
Equivalent to AccelPointsFallback but applies to the Motion acceleration function.
.BI "Option \*AccelStepMotion\*q \*q" float \*q
Equivalent to AccelStepFallback but applies to the Motion acceleration function.
.TP 7
.BI "Option \*qButtonMapping\*q \*q" string \*q
Sets the logical button mapping for this device, see