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: Simon Thum <simon.thum@gmx.de>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

2 files changed, 46 insertions, 2 deletions

diff --git a/hw/xfree86/common/xf86Xinput.c b/hw/xfree86/common/xf86Xinput.c
index 920b9406f..df774a155 100644
--- a/hw/xfree86/common/xf86Xinput.c
+++ b/hw/xfree86/common/xf86Xinput.c
@@ -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){
+    if (dev->valuator && dev->ptrfeed) {
 	schemeStr = xf86SetStrOption(local->options, "AccelerationScheme", "");
 
 	scheme = dev->valuator->accelScheme.number;
@@ -244,6 +244,30 @@ ApplyAccelerationSettings(DeviceIntPtr dev){
                                               pVel);
                 break;
         }
+
+        i = xf86SetIntOption(local->options, "AccelerationNumerator",
+                             dev->ptrfeed->ctrl.num);
+        if (i >= 0)
+            dev->ptrfeed->ctrl.num = i;
+
+        i = xf86SetIntOption(local->options, "AccelerationDenominator",
+                             dev->ptrfeed->ctrl.den);
+        if (i > 0)
+            dev->ptrfeed->ctrl.den = i;
+
+        i = xf86SetIntOption(local->options, "AccelerationThreshold",
+                             dev->ptrfeed->ctrl.threshold);
+        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)/
+                                         ((float)dev->ptrfeed->ctrl.den));
+        xf86Msg(X_CONFIG, "%s: (accel) acceleration threshold: %i\n",
+                local->name, dev->ptrfeed->ctrl.threshold);
     }
 }
 
diff --git a/hw/xfree86/doc/man/xorg.conf.man.pre b/hw/xfree86/doc/man/xorg.conf.man.pre
index be0c67654..222530b41 100644
--- a/hw/xfree86/doc/man/xorg.conf.man.pre
+++ b/hw/xfree86/doc/man/xorg.conf.man.pre
@@ -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"
+.fi
+.RE
+.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
+and
+.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.
 
 .SH "INPUTCLASS SECTION"
 The config file may have multiple