/**
* Modifies valuators in-place.
* This version employs a velocity approximation algorithm to
* enable fine-grained predictable acceleration profiles.
*/
void
acceleratePointerPredictable(
DeviceIntPtr dev,
int first_valuator,
int num_valuators,
int *valuators,
int evtime)
{
float mult = 0.0;
int dx = 0, dy = 0;
int *px = NULL, *py = NULL;
DeviceVelocityPtr velocitydata =
(DeviceVelocityPtr) dev->valuator->accelScheme.accelData;
float fdx, fdy, tmp; /* no need to init */
Bool soften = TRUE;
if (!num_valuators || !valuators || !velocitydata)
return;
if (velocitydata->statistics.profile_number == AccelProfileNone &&
velocitydata->const_acceleration == 1.0f) {
return; /*we're inactive anyway, so skip the whole thing.*/
}
if (first_valuator == 0) {
dx = valuators[0];
px = &valuators[0];
}
if (first_valuator <= 1 && num_valuators >= (2 - first_valuator)) {
dy = valuators[1 - first_valuator];
py = &valuators[1 - first_valuator];
}
if (dx || dy){
/* reset non-visible state? */
if (ProcessVelocityData2D(velocitydata, dx , dy, evtime)) {
soften = FALSE;
}
if (dev->ptrfeed && dev->ptrfeed->ctrl.num) {
/* invoke acceleration profile to determine acceleration */
mult = ComputeAcceleration (dev, velocitydata,
dev->ptrfeed->ctrl.threshold,
(float)dev->ptrfeed->ctrl.num /
(float)dev->ptrfeed->ctrl.den);
if(mult != 1.0 || velocitydata->const_acceleration != 1.0) {
ApplySofteningAndConstantDeceleration( velocitydata,
dx, dy,
&fdx, &fdy,
(mult > 1.0) && soften);
if (dx) {
tmp = mult * fdx + dev->last.remainder[0];
/* Since it may not be apparent: lrintf() does not offer
* strong statements about rounding; however because we
* process each axis conditionally, there's no danger
* of a toggling remainder. Its lack of guarantees likely
* makes it faster on the average target. */
*px = lrintf(tmp);
dev->last.remainder[0] = tmp - (float)*px;
}
if (dy) {
tmp = mult * fdy + dev->last.remainder[1];
*py = lrintf(tmp);
dev->last.remainder[1] = tmp - (float)*py;
}
DebugAccelF("pos (%i | %i) remainders x: %.3f y: %.3f delta x:%.3f y:%.3f\n",
*px, *py, dev->last.remainder[0], dev->last.remainder[1], fdx, fdy);
}
}
}
/* remember last motion delta (for softening/slow movement treatment) */
velocitydata->last_dx = dx;
velocitydata->last_dy = dy;
}
/**
* Modifies valuators in-place.
* This version employs a velocity approximation algorithm to
* enable fine-grained predictable acceleration profiles.
*/
void
acceleratePointerPredictable(
DeviceIntPtr dev,
ValuatorMask* val,
CARD32 evtime)
{
float fdx, fdy, tmp, mult; /* no need to init */
int dx = 0, dy = 0, tmpi;
DeviceVelocityPtr velocitydata = GetDevicePredictableAccelData(dev);
Bool soften = TRUE;
if (!velocitydata)
return;
if (velocitydata->statistics.profile_number == AccelProfileNone &&
velocitydata->const_acceleration == 1.0f) {
return; /*we're inactive anyway, so skip the whole thing.*/
}
if (valuator_mask_isset(val, 0)) {
dx = valuator_mask_get(val, 0);
}
if (valuator_mask_isset(val, 1)) {
dy = valuator_mask_get(val, 1);
}
if (dx || dy){
/* reset non-visible state? */
if (ProcessVelocityData2D(velocitydata, dx , dy, evtime)) {
soften = FALSE;
}
if (dev->ptrfeed && dev->ptrfeed->ctrl.num) {
/* invoke acceleration profile to determine acceleration */
mult = ComputeAcceleration (dev, velocitydata,
dev->ptrfeed->ctrl.threshold,
(float)dev->ptrfeed->ctrl.num /
(float)dev->ptrfeed->ctrl.den);
if(mult != 1.0f || velocitydata->const_acceleration != 1.0f) {
ApplySofteningAndConstantDeceleration(velocitydata,
dx, dy,
&fdx, &fdy,
(mult > 1.0f) && soften);
if (dx) {
tmp = mult * fdx + dev->last.remainder[0];
/* Since it may not be apparent: lrintf() does not offer
* strong statements about rounding; however because we
* process each axis conditionally, there's no danger
* of a toggling remainder. Its lack of guarantees likely
* makes it faster on the average target. */
tmpi = lrintf(tmp);
valuator_mask_set(val, 0, tmpi);
dev->last.remainder[0] = tmp - (float)tmpi;
}
if (dy) {
tmp = mult * fdy + dev->last.remainder[1];
tmpi = lrintf(tmp);
valuator_mask_set(val, 1, tmpi);
dev->last.remainder[1] = tmp - (float)tmpi;
}
DebugAccelF("pos (%i | %i) remainders x: %.3f y: %.3f delta x:%.3f y:%.3f\n",
*px, *py, dev->last.remainder[0], dev->last.remainder[1], fdx, fdy);
}
}
}
/* remember last motion delta (for softening/slow movement treatment) */
velocitydata->last_dx = dx;
velocitydata->last_dy = dy;
}
/**
* Modifies valuators in-place.
* This version employs a velocity approximation algorithm to
* enable fine-grained predictable acceleration profiles.
*/
void
acceleratePointerPredictable(
DeviceIntPtr pDev,
int first_valuator,
int num_valuators,
int *valuators,
int evtime)
{
float mult = 0.0;
int dx = 0, dy = 0;
int *px = NULL, *py = NULL;
DeviceVelocityPtr velocitydata =
(DeviceVelocityPtr) pDev->valuator->accelScheme.accelData;
float fdx, fdy; /* no need to init */
if (!num_valuators || !valuators || !velocitydata)
return;
if (first_valuator == 0) {
dx = valuators[0];
px = &valuators[0];
}
if (first_valuator <= 1 && num_valuators >= (2 - first_valuator)) {
dy = valuators[1 - first_valuator];
py = &valuators[1 - first_valuator];
}
if (dx || dy){
/* reset nonvisible state? */
if (ProcessVelocityData(velocitydata, dx , dy, evtime)) {
/* set to center of pixel. makes sense as long as there are no
* means of passing on sub-pixel values.
*/
pDev->last.remainder[0] = pDev->last.remainder[1] = 0.5f;
/* prevent softening (somewhat quirky solution,
as it depends on the algorithm) */
velocitydata->last_dx = dx;
velocitydata->last_dy = dy;
}
if (pDev->ptrfeed && pDev->ptrfeed->ctrl.num) {
/* invoke acceleration profile to determine acceleration */
mult = ComputeAcceleration (velocitydata,
pDev->ptrfeed->ctrl.threshold,
(float)pDev->ptrfeed->ctrl.num /
(float)pDev->ptrfeed->ctrl.den);
if(mult != 1.0 || velocitydata->const_acceleration != 1.0) {
ApplySofteningAndConstantDeceleration( velocitydata,
dx, dy,
&fdx, &fdy,
mult > 1.0);
if (dx) {
pDev->last.remainder[0] = mult * fdx + pDev->last.remainder[0];
*px = (int)pDev->last.remainder[0];
pDev->last.remainder[0] = pDev->last.remainder[0] - (float)*px;
}
if (dy) {
pDev->last.remainder[1] = mult * fdy + pDev->last.remainder[1];
*py = (int)pDev->last.remainder[1];
pDev->last.remainder[1] = pDev->last.remainder[1] - (float)*py;
}
}
}
}
/* remember last motion delta (for softening/slow movement treatment) */
velocitydata->last_dx = dx;
velocitydata->last_dy = dy;
}
