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dix: allow a ConstantDeceleration between 0 and 1 (#66134)

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A constant deceleration of x simply means (delta * 1/x). We limited that to
values >= 1.0f for obvious reasons, but can also allow values from 0-1.
That means that ConstantDeceleration is actually a ConstantAcceleration, but
hey, if someone needs it...

X.Org Bug 66134 <http://bugs.freedesktop.org/show_bug.cgi?id=66134>

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Keith Packard <keithp@keithp.com>
This commit is contained in:
Peter Hutterer 2013-07-15 13:06:28 +10:00
parent 0e3be0b25f
commit 74469895e3
2 changed files with 4 additions and 4 deletions
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5
dix/ptrveloc.c
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@ -245,11 +245,10 @@ AccelSetDecelProperty(DeviceIntPtr dev, Atom atom,
if (checkOnly) {
if (rc)
return rc;
return (v >= 1.0f) ? Success : BadValue;
return (v > 0) ? Success : BadValue;
}
if (v >= 1.0f)
vel->const_acceleration = 1 / v;
vel->const_acceleration = 1 / v;
return Success;
}

3
hw/xfree86/man/xorg.conf.man
View File

@ -972,7 +972,8 @@ is constructed. This is mainly a matter of personal preference.
.BI "Option \*qConstantDeceleration\*q \*q" real \*q
Makes the pointer go
.B deceleration
times slower than normal. Most useful for high-resolution devices.
times slower than normal. Most useful for high-resolution devices. A value
between 0 and 1 will speed up the pointer.
.TP 7
.BI "Option \*qAdaptiveDeceleration\*q \*q" real \*q
Allows to actually decelerate the pointer when going slow. At most, it will be