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dix: export driver-side functions for acceleration 

also add additional safety for accel driver api

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
This commit is contained in:
Simon Thum 2008-07-28 14:07:48 +02:00 committed by Peter Hutterer
parent 18e9fd69fe
commit d762c08aeb
1 changed files with 12 additions and 3 deletions
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15
dix/ptrveloc.c
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@ -695,7 +695,7 @@ LinearProfile(
* would be a good place, since FreeVelocityData() also calls this with -1.
* returns FALSE (0) if profile number is unavailable.
*/
int
_X_EXPORT int
SetAccelerationProfile(
DeviceVelocityPtr s,
int profile_num)
@ -744,6 +744,11 @@ SetAccelerationProfile(
return TRUE;
}
/**********************************************
* driver interaction
**********************************************/
/**
* device-specific profile
*
@ -753,7 +758,7 @@ SetAccelerationProfile(
* it should do init/uninit in the driver (ie. with DEVICE_INIT and friends).
* Users may override or choose it.
*/
extern void
_X_EXPORT void
SetDeviceSpecificAccelerationProfile(
DeviceVelocityPtr s,
PointerAccelerationProfileFunc profile)
@ -766,11 +771,15 @@ SetDeviceSpecificAccelerationProfile(
* Use this function to obtain a DeviceVelocityPtr for a device. Will return NULL if
* the predictable acceleration scheme is not in effect.
*/
DeviceVelocityPtr
_X_EXPORT DeviceVelocityPtr
GetDevicePredictableAccelData(
DeviceIntPtr pDev)
{
/*sanity check*/
if(!pDev){
ErrorF("[dix] accel: DeviceIntPtr was NULL");
return NULL;
}
if( pDev->valuator &&
pDev->valuator->accelScheme.AccelSchemeProc ==
acceleratePointerPredictable &&