Adds a dedicated scroll movement type to the custom acceleration profile.
Supported by physical mouse and touchpad.
Other profiles remain the same by using the same unaccelerated filter for the scroll filter.
Signed-off-by: Yinon Burgansky <51504-Yinon@users.noreply.gitlab.freedesktop.org>
Users that want a flat pointer acceleration want the input speed to
match 1:1 to the output speed, barring a fixed constant multiplier.
This will apply to things like button scrolling as well, so let's map
the constant accel function to the non-constant accel functions to the
speed setting applies to every movement.
This is applied to both the flat and the touchpad flat filter.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
On mice, switching the acceleration profile to flat disables dpi normalization,
because high or even switchable dpi are generally major features of a
high-end mouse, and switching to flat acceleration indicates that the user
wants to reduce the effects of any cursor acceleration to a minimum.
Therefore we skip normalization there and let the user take full advantage
of their expensive hardware.
On touchpads, particularly those built into a laptop, users have to deal with
whatever hardware they have; touchpad dpi is an afterthought at best, or
a disaster at worst. Switching to the flat profile is more likely to be
about avoiding the non-linear acceleration curve of the adaptive profile.
Hence the flat profile for touchpads shouldn't copy what the one for mice does,
but rather use dpi normalization like the adaptive profile. This keeps flat
acceleration on low-resolution touchpads from dropping to unusably slow speeds.
Signed-off-by: satrmb <10471-satrmb@users.noreply.gitlab.freedesktop.org>
