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dix: improve pointer acceleration API 

This makes the ptr accel api actually sensible from a driver
perspective, since it avoids superfluous device lookups.
Also, makes independent accel contexts possible.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
This commit is contained in:
Simon Thum 2009-06-24 11:16:24 +02:00 committed by Peter Hutterer
parent b8050bb6de
commit 373e8c960d
2 changed files with 54 additions and 30 deletions
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66
dix/ptrveloc.c
View File

@ -63,7 +63,7 @@
int
SetAccelerationProfile(DeviceVelocityPtr s, int profile_num);
static float
SimpleSmoothProfile(DeviceVelocityPtr pVel, float velocity,
SimpleSmoothProfile(DeviceIntPtr dev, DeviceVelocityPtr vel, float velocity,
float threshold, float acc);
static PointerAccelerationProfileFunc
GetAccelerationProfile(DeviceVelocityPtr s, int profile_num);
@ -108,7 +108,7 @@ InitVelocityData(DeviceVelocityPtr s)
/**
* Clean up
*/
static void
void
FreeVelocityData(DeviceVelocityPtr s){
xfree(s->tracker);
SetAccelerationProfile(s, PROFILE_UNINITIALIZE);
@ -555,7 +555,7 @@ QueryTrackers(DeviceVelocityPtr s, int cur_t){
* Perform velocity approximation based on 2D 'mickeys' (mouse motion delta).
* return true if non-visible state reset is suggested
*/
static short
short
ProcessVelocityData2D(
DeviceVelocityPtr s,
int dx,
@ -616,19 +616,20 @@ ApplySofteningAndConstantDeceleration(
/*
* compute the acceleration for given velocity and enforce min_acceleartion
*/
static float
float
BasicComputeAcceleration(
DeviceVelocityPtr pVel,
DeviceIntPtr dev,
DeviceVelocityPtr vel,
float velocity,
float threshold,
float acc){
float result;
result = pVel->Profile(pVel, velocity, threshold, acc);
result = vel->Profile(dev, vel, velocity, threshold, acc);
/* enforce min_acceleration */
if (result < pVel->min_acceleration)
result = pVel->min_acceleration;
if (result < vel->min_acceleration)
result = vel->min_acceleration;
return result;
}
@ -637,6 +638,7 @@ BasicComputeAcceleration(
*/
static float
ComputeAcceleration(
DeviceIntPtr dev,
DeviceVelocityPtr vel,
float threshold,
float acc){
@ -655,9 +657,11 @@ ComputeAcceleration(
* current and previous velocity.
* Though being the more natural choice, it causes a minor delay
* in comparison, so it can be disabled. */
res = BasicComputeAcceleration(vel, vel->velocity, threshold, acc);
res += BasicComputeAcceleration(vel, vel->last_velocity, threshold, acc);
res += 4.0f * BasicComputeAcceleration(vel,
res = BasicComputeAcceleration(
dev, vel, vel->velocity, threshold, acc);
res += BasicComputeAcceleration(
dev, vel, vel->last_velocity, threshold, acc);
res += 4.0f * BasicComputeAcceleration(dev, vel,
(vel->last_velocity + vel->velocity) / 2,
threshold, acc);
res /= 6.0f;
@ -665,7 +669,8 @@ ComputeAcceleration(
vel->velocity, vel->last_velocity, res);
return res;
}else{
res = BasicComputeAcceleration(vel, vel->velocity, threshold, acc);
res = BasicComputeAcceleration(dev, vel,
vel->velocity, threshold, acc);
DebugAccelF("(dix ptracc) profile sample [%.2f] is %.3f\n",
vel->velocity, res);
return res;
@ -682,7 +687,8 @@ ComputeAcceleration(
*/
static float
PolynomialAccelerationProfile(
DeviceVelocityPtr pVel,
DeviceIntPtr dev,
DeviceVelocityPtr vel,
float velocity,
float ignored,
float acc)
@ -697,18 +703,21 @@ PolynomialAccelerationProfile(
*/
static float
ClassicProfile(
DeviceVelocityPtr pVel,
DeviceIntPtr dev,
DeviceVelocityPtr vel,
float velocity,
float threshold,
float acc)
{
if (threshold) {
return SimpleSmoothProfile (pVel,
if (threshold > 0) {
return SimpleSmoothProfile (dev,
vel,
velocity,
threshold,
acc);
} else {
return PolynomialAccelerationProfile (pVel,
return PolynomialAccelerationProfile (dev,
vel,
velocity,
0,
acc);
@ -726,7 +735,8 @@ ClassicProfile(
*/
static float
PowerProfile(
DeviceVelocityPtr pVel,
DeviceIntPtr dev,
DeviceVelocityPtr vel,
float velocity,
float threshold,
float acc)
@ -736,9 +746,9 @@ PowerProfile(
acc = (acc-1.0) * 0.1f + 1.0; /* without this, acc of 2 is unuseable */
if (velocity <= threshold)
return pVel->min_acceleration;
return vel->min_acceleration;
vel_dist = velocity - threshold;
return (pow(acc, vel_dist)) * pVel->min_acceleration;
return (pow(acc, vel_dist)) * vel->min_acceleration;
}
@ -763,7 +773,8 @@ CalcPenumbralGradient(float x){
*/
static float
SimpleSmoothProfile(
DeviceVelocityPtr pVel,
DeviceIntPtr dev,
DeviceVelocityPtr vel,
float velocity,
float threshold,
float acc)
@ -788,7 +799,8 @@ SimpleSmoothProfile(
*/
static float
SmoothLinearProfile(
DeviceVelocityPtr pVel,
DeviceIntPtr dev,
DeviceVelocityPtr vel,
float velocity,
float threshold,
float acc)
@ -811,14 +823,15 @@ SmoothLinearProfile(
res = nv * 2.0f / M_PI /* steepness of gradient at 0.5 */
+ 1.0f; /* gradient crosses 2|1 */
}
res += pVel->min_acceleration;
res += vel->min_acceleration;
return res;
}
static float
LinearProfile(
DeviceVelocityPtr pVel,
DeviceIntPtr dev,
DeviceVelocityPtr vel,
float velocity,
float threshold,
float acc)
@ -829,7 +842,8 @@ LinearProfile(
static float
NoProfile(
DeviceVelocityPtr pVel,
DeviceIntPtr dev,
DeviceVelocityPtr vel,
float velocity,
float threshold,
float acc)
@ -992,7 +1006,7 @@ acceleratePointerPredictable(
if (pDev->ptrfeed && pDev->ptrfeed->ctrl.num) {
/* invoke acceleration profile to determine acceleration */
mult = ComputeAcceleration (velocitydata,
mult = ComputeAcceleration (pDev, velocitydata,
pDev->ptrfeed->ctrl.threshold,
(float)pDev->ptrfeed->ctrl.num /
(float)pDev->ptrfeed->ctrl.den);

18
include/ptrveloc.h
View File

@ -1,6 +1,6 @@
/*
*
* Copyright © 2006-2008 Simon Thum simon dot thum at gmx dot de
* Copyright © 2006-2009 Simon Thum simon dot thum at gmx dot de
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
@ -47,8 +47,8 @@ struct _DeviceVelocityRec;
* returns actual acceleration depending on velocity, acceleration control,...
*/
typedef float (*PointerAccelerationProfileFunc)
(struct _DeviceVelocityRec* /*pVel*/,
float /*velocity*/, float /*threshold*/, float /*acc*/);
(DeviceIntPtr dev, struct _DeviceVelocityRec* vel,
float velocity, float threshold, float accelCoeff);
/**
* a motion history, with just enough information to
@ -96,8 +96,18 @@ InitVelocityData(DeviceVelocityPtr s);
extern _X_EXPORT void
InitTrackers(DeviceVelocityPtr s, int ntracker);
extern _X_EXPORT short
ProcessVelocityData2D(DeviceVelocityPtr vel, int dx, int dy, int time);
extern _X_EXPORT float
BasicComputeAcceleration(DeviceIntPtr dev, DeviceVelocityPtr vel,
float velocity, float threshold, float acc);
extern _X_EXPORT void
FreeVelocityData(DeviceVelocityPtr vel);
extern _X_EXPORT BOOL
InitializePredictableAccelerationProperties(DeviceIntPtr pDev);
InitializePredictableAccelerationProperties(DeviceIntPtr dev);
extern _X_EXPORT int
SetAccelerationProfile(DeviceVelocityPtr s, int profile_num);