/**
* Originally a part of xf86PostMotionEvent; modifies valuators
* in-place. Retained mostly for embedded scenarios.
*/
void
acceleratePointerLightweight(
DeviceIntPtr dev,
ValuatorMask* val,
CARD32 ignored)
{
double mult = 0.0, tmpf;
double dx = 0.0, dy = 0.0;
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 (valuator_mask_num_valuators(val) == 0)
return;
if (dev->ptrfeed && dev->ptrfeed->ctrl.num) {
/* modeled from xf86Events.c */
if (dev->ptrfeed->ctrl.threshold) {
if ((fabs(dx) + fabs(dy)) >= dev->ptrfeed->ctrl.threshold) {
if (dx != 0.0) {
tmpf = (dx * (double)(dev->ptrfeed->ctrl.num)) /
(double)(dev->ptrfeed->ctrl.den);
valuator_mask_set_double(val, 0, tmpf);
}
if (dy != 0.0) {
tmpf = (dy * (double)(dev->ptrfeed->ctrl.num)) /
(double)(dev->ptrfeed->ctrl.den);
valuator_mask_set_double(val, 1, tmpf);
}
}
}
else {
mult = pow(dx * dx + dy * dy,
((double)(dev->ptrfeed->ctrl.num) /
(double)(dev->ptrfeed->ctrl.den) - 1.0) /
2.0) / 2.0;
if (dx != 0.0)
valuator_mask_set_double(val, 0, mult * dx);
if (dy != 0.0)
valuator_mask_set_double(val, 1, mult * dy);
}
}
}
/**
* Originally a part of xf86PostMotionEvent; modifies valuators
* in-place. Retained mostly for embedded scenarios.
*/
void
acceleratePointerLightweight(
DeviceIntPtr dev,
ValuatorMask* val,
CARD32 ignored)
{
float mult = 0.0, tmpf;
int dx = 0, dy = 0, tmpi;
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)
return;
if (dev->ptrfeed && dev->ptrfeed->ctrl.num) {
/* modeled from xf86Events.c */
if (dev->ptrfeed->ctrl.threshold) {
if ((abs(dx) + abs(dy)) >= dev->ptrfeed->ctrl.threshold) {
tmpf = ((float)dx *
(float)(dev->ptrfeed->ctrl.num)) /
(float)(dev->ptrfeed->ctrl.den) +
dev->last.remainder[0];
if (dx) {
tmpi = (int) tmpf;
valuator_mask_set(val, 0, tmpi);
dev->last.remainder[0] = tmpf - (float)tmpi;
}
tmpf = ((float)dy *
(float)(dev->ptrfeed->ctrl.num)) /
(float)(dev->ptrfeed->ctrl.den) +
dev->last.remainder[1];
if (dy) {
tmpi = (int) tmpf;
valuator_mask_set(val, 1, tmpi);
dev->last.remainder[1] = tmpf - (float)tmpi;
}
}
}
else {
mult = pow((float)dx * (float)dx + (float)dy * (float)dy,
((float)(dev->ptrfeed->ctrl.num) /
(float)(dev->ptrfeed->ctrl.den) - 1.0) /
2.0) / 2.0;
if (dx) {
tmpf = mult * (float)dx +
dev->last.remainder[0];
tmpi = (int) tmpf;
valuator_mask_set(val, 0, tmpi);
dev->last.remainder[0] = tmpf - (float)tmpi;
}
if (dy) {
tmpf = mult * (float)dy +
dev->last.remainder[1];
tmpi = (int)tmpf;
valuator_mask_set(val, 1, tmpi);
dev->last.remainder[1] = tmpf - (float)tmpi;
}
}
}
}
/**
* 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;
}