Commit 032f9780 authored by simonthum's avatar simonthum Committed by Peter Hutterer

xfree86: init pointer feedback controls from options

With InputClass support, it makes more sense to cover all
aspects of acceleration in options. Previously, one could only set the
default on the command line.
Signed-off-by: simonthum's avatarSimon Thum <>
Reviewed-by: Peter Hutterer's avatarPeter Hutterer <>
Signed-off-by: Peter Hutterer's avatarPeter Hutterer <>
parent 0722c287
......@@ -196,12 +196,12 @@ ProcessVelocityConfiguration(DeviceIntPtr pDev, char* devname, pointer list,
static void
ApplyAccelerationSettings(DeviceIntPtr dev){
int scheme;
int scheme, i;
DeviceVelocityPtr pVel;
LocalDevicePtr local = (LocalDevicePtr)dev->public.devicePrivate;
char* schemeStr;
if (dev->valuator && dev->ptrfeed) {
schemeStr = xf86SetStrOption(local->options, "AccelerationScheme", "");
scheme = dev->valuator->accelScheme.number;
......@@ -244,6 +244,30 @@ ApplyAccelerationSettings(DeviceIntPtr dev){
i = xf86SetIntOption(local->options, "AccelerationNumerator",
if (i >= 0)
dev->ptrfeed->ctrl.num = i;
i = xf86SetIntOption(local->options, "AccelerationDenominator",
if (i > 0)
dev->ptrfeed->ctrl.den = i;
i = xf86SetIntOption(local->options, "AccelerationThreshold",
if (i >= 0)
dev->ptrfeed->ctrl.threshold = i;
/* mostly a no-op anyway */
(*dev->ptrfeed->CtrlProc)(dev, &dev->ptrfeed->ctrl);
xf86Msg(X_CONFIG, "%s: (accel) acceleration factor: %.3f\n",
local->name, ((float)dev->ptrfeed->ctrl.num)/
xf86Msg(X_CONFIG, "%s: (accel) acceleration threshold: %i\n",
local->name, dev->ptrfeed->ctrl.threshold);
......@@ -959,6 +959,26 @@ Selects the scheme, which is the underlying algorithm.
.B "predictable default algorithm (behaving more predictable)"
.B "lightweight old acceleration code (as specified in the X protocol spec)"
.B "none no acceleration or deceleration"
.TP 7
.BI "Option \*qAccelerationNumerator\*q \*q" integer \*q
.TP 7
.BI "Option \*qAccelerationDenominator\*q \*q" integer \*q
Set numerator and denominator of the acceleration factor. The acceleration
factor is a rational which, together with threshold, can be used to tweak
profiles to suit the users needs. The
.B simple
.B limited
profiles use it directly (i.e. they accelerate by the factor), for other
profiles it should hold that a higher acceleration factor leads to a faster
pointer. Typically, 1 is unaccelerated and values up to 5 are sensible.
.TP 7
.BI "Option \*qAccelerationThreshold\*q \*q" integer \*q
Set the threshold, which is roughly the velocity (usually device units per 10
ms) required for acceleration to become effective. The precise effect varies
with the profile however.
The config file may have multiple
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