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-rw-r--r--xorg-server/dix/ptrveloc.c995
1 files changed, 590 insertions, 405 deletions
diff --git a/xorg-server/dix/ptrveloc.c b/xorg-server/dix/ptrveloc.c
index e9d4e882f..37c8e5178 100644
--- a/xorg-server/dix/ptrveloc.c
+++ b/xorg-server/dix/ptrveloc.c
@@ -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"),
@@ -28,14 +28,15 @@
#include <math.h>
#include <ptrveloc.h>
-#include <inputstr.h>
-#include <assert.h>
-#include <os.h>
+#include <exevents.h>
+#include <X11/Xatom.h>
+
+#include <xserver-properties.h>
/*****************************************************************************
* Predictable pointer acceleration
*
- * 2006-2008 by Simon Thum (simon [dot] thum [at] gmx de)
+ * 2006-2009 by Simon Thum (simon [dot] thum [at] gmx de)
*
* Serves 3 complementary functions:
* 1) provide a sophisticated ballistic velocity estimate to improve
@@ -52,31 +53,20 @@
* which returns an acceleration
* for a given velocity
*
- * The profile can be selected by the user (potentially at runtime).
- * the classic profile is intended to cleanly perform old-style
+ * The profile can be selected by the user at runtime.
+ * The classic profile is intended to cleanly perform old-style
* function selection (threshold =/!= 0)
*
****************************************************************************/
/* fwds */
-static inline void
-FeedFilterStage(FilterStagePtr s, float value, int tdiff);
-extern void
-InitFilterStage(FilterStagePtr s, float rdecay, int lutsize);
-void
-CleanupFilterChain(DeviceVelocityPtr s);
int
-SetAccelerationProfile(DeviceVelocityPtr s, int profile_num);
-void
-InitFilterChain(DeviceVelocityPtr s, float rdecay, float degression,
- int stages, int lutsize);
-void
-CleanupFilterChain(DeviceVelocityPtr s);
+SetAccelerationProfile(DeviceVelocityPtr vel, 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 vel, int profile_num);
/*#define PTRACCEL_DEBUGGING*/
@@ -87,36 +77,41 @@ SimpleSmoothProfile(DeviceVelocityPtr pVel, float velocity,
#endif
/********************************
- * Init/Uninit etc
+ * Init/Uninit
*******************************/
+/* some int which is not a profile number */
+#define PROFILE_UNINITIALIZE (-100)
+
/**
* Init struct so it should match the average case
*/
void
-InitVelocityData(DeviceVelocityPtr s)
+InitVelocityData(DeviceVelocityPtr vel)
{
- memset(s, 0, sizeof(DeviceVelocityRec));
-
- s->corr_mul = 10.0; /* dots per 10 milisecond should be usable */
- s->const_acceleration = 1.0; /* no acceleration/deceleration */
- s->reset_time = 300;
- s->use_softening = 1;
- s->min_acceleration = 1.0; /* don't decelerate */
- s->coupling = 0.25;
- s->average_accel = TRUE;
- SetAccelerationProfile(s, AccelProfileClassic);
- InitFilterChain(s, (float)1.0/20.0, 1, 1, 40);
+ memset(vel, 0, sizeof(DeviceVelocityRec));
+
+ vel->corr_mul = 10.0; /* dots per 10 milisecond should be usable */
+ vel->const_acceleration = 1.0; /* no acceleration/deceleration */
+ vel->reset_time = 300;
+ vel->use_softening = 1;
+ vel->min_acceleration = 1.0; /* don't decelerate */
+ vel->max_rel_diff = 0.2;
+ vel->max_diff = 1.0;
+ vel->initial_range = 2;
+ vel->average_accel = TRUE;
+ SetAccelerationProfile(vel, AccelProfileClassic);
+ InitTrackers(vel, 16);
}
/**
* Clean up
*/
-static void
-FreeVelocityData(DeviceVelocityPtr s){
- CleanupFilterChain(s);
- SetAccelerationProfile(s, -1);
+void
+FreeVelocityData(DeviceVelocityPtr vel){
+ xfree(vel->tracker);
+ SetAccelerationProfile(vel, PROFILE_UNINITIALIZE);
}
@@ -124,302 +119,461 @@ FreeVelocityData(DeviceVelocityPtr s){
* dix uninit helper, called through scheme
*/
void
-AccelerationDefaultCleanup(DeviceIntPtr pDev)
+AccelerationDefaultCleanup(DeviceIntPtr dev)
{
/*sanity check*/
- if( pDev->valuator->accelScheme.AccelSchemeProc == acceleratePointerPredictable
- && pDev->valuator->accelScheme.accelData != NULL){
- pDev->valuator->accelScheme.AccelSchemeProc = NULL;
- FreeVelocityData(pDev->valuator->accelScheme.accelData);
- xfree(pDev->valuator->accelScheme.accelData);
- pDev->valuator->accelScheme.accelData = NULL;
+ if( dev->valuator->accelScheme.AccelSchemeProc == acceleratePointerPredictable
+ && dev->valuator->accelScheme.accelData != NULL){
+ dev->valuator->accelScheme.AccelSchemeProc = NULL;
+ FreeVelocityData(dev->valuator->accelScheme.accelData);
+ xfree(dev->valuator->accelScheme.accelData);
+ dev->valuator->accelScheme.accelData = NULL;
}
}
-/*********************
- * Filtering logic
- ********************/
+
+/*************************
+ * Input property support
+ ************************/
/**
-Initialize a filter chain.
-Expected result is a series of filters, each progressively more integrating.
-
-This allows for two strategies: Either you have one filter which is reasonable
-and is being coupled to account for fast-changing input, or you have 'one for
-every situation'. You might want to have tighter coupling then, e.g. 0.1.
-In the filter stats, you can see if a reasonable filter useage emerges.
-*/
-void
-InitFilterChain(DeviceVelocityPtr s, float rdecay, float progression, int stages, int lutsize)
+ * choose profile
+ */
+static int
+AccelSetProfileProperty(DeviceIntPtr dev, Atom atom,
+ XIPropertyValuePtr val, BOOL checkOnly)
{
- int fn;
- if((stages > 1 && progression < 1.0f) || 0 == progression){
- ErrorF("(dix ptracc) invalid filter chain progression specified\n");
- return;
- }
- /* Block here to support runtime filter adjustment */
- OsBlockSignals();
- for(fn = 0; fn < MAX_VELOCITY_FILTERS; fn++){
- if(fn < stages){
- InitFilterStage(&s->filters[fn], rdecay, lutsize);
- }else{
- InitFilterStage(&s->filters[fn], 0, 0);
- }
- rdecay /= progression;
- }
- /* release again. Should the input loop be threaded, we also need
- * memory release here (in principle).
- */
- OsReleaseSignals();
+ DeviceVelocityPtr vel;
+ int profile, *ptr = &profile;
+ int rc;
+ int nelem = 1;
+
+ if (atom != XIGetKnownProperty(ACCEL_PROP_PROFILE_NUMBER))
+ return Success;
+
+ vel = GetDevicePredictableAccelData(dev);
+ if (!vel)
+ return BadValue;
+ rc = XIPropToInt(val, &nelem, &ptr);
+
+ if(checkOnly)
+ {
+ if (rc)
+ return rc;
+
+ if (GetAccelerationProfile(vel, profile) == NULL)
+ return BadValue;
+ } else
+ SetAccelerationProfile(vel, profile);
+
+ return Success;
}
+static void
+AccelInitProfileProperty(DeviceIntPtr dev, DeviceVelocityPtr vel)
+{
+ int profile = vel->statistics.profile_number;
+ Atom prop_profile_number = XIGetKnownProperty(ACCEL_PROP_PROFILE_NUMBER);
-void
-CleanupFilterChain(DeviceVelocityPtr s)
+ XIChangeDeviceProperty(dev, prop_profile_number, XA_INTEGER, 32,
+ PropModeReplace, 1, &profile, FALSE);
+ XISetDevicePropertyDeletable(dev, prop_profile_number, FALSE);
+ XIRegisterPropertyHandler(dev, AccelSetProfileProperty, NULL, NULL);
+}
+
+/**
+ * constant deceleration
+ */
+static int
+AccelSetDecelProperty(DeviceIntPtr dev, Atom atom,
+ XIPropertyValuePtr val, BOOL checkOnly)
{
- int fn;
+ DeviceVelocityPtr vel;
+ float v, *ptr = &v;
+ int rc;
+ int nelem = 1;
+
+ if (atom != XIGetKnownProperty(ACCEL_PROP_CONSTANT_DECELERATION))
+ return Success;
+
+ vel = GetDevicePredictableAccelData(dev);
+ if (!vel)
+ return BadValue;
+ rc = XIPropToFloat(val, &nelem, &ptr);
+
+ if(checkOnly)
+ {
+ if (rc)
+ return rc;
+ return (v >= 1.0f) ? Success : BadValue;
+ }
+
+ if(v >= 1.0f)
+ vel->const_acceleration = 1/v;
- for(fn = 0; fn < MAX_VELOCITY_FILTERS; fn++)
- InitFilterStage(&s->filters[fn], 0, 0);
+ return Success;
}
-static inline void
-StuffFilterChain(DeviceVelocityPtr s, float value)
+static void
+AccelInitDecelProperty(DeviceIntPtr dev, DeviceVelocityPtr vel)
{
- int fn;
+ float fval = 1.0/vel->const_acceleration;
+ Atom prop_const_decel = XIGetKnownProperty(ACCEL_PROP_CONSTANT_DECELERATION);
+ XIChangeDeviceProperty(dev, prop_const_decel,
+ XIGetKnownProperty(XATOM_FLOAT), 32,
+ PropModeReplace, 1, &fval, FALSE);
+ XISetDevicePropertyDeletable(dev, prop_const_decel, FALSE);
+ XIRegisterPropertyHandler(dev, AccelSetDecelProperty, NULL, NULL);
+}
- for(fn = 0; fn < MAX_VELOCITY_FILTERS; fn++){
- if(s->filters[fn].rdecay != 0)
- s->filters[fn].current = value;
- else break;
+
+/**
+ * adaptive deceleration
+ */
+static int
+AccelSetAdaptDecelProperty(DeviceIntPtr dev, Atom atom,
+ XIPropertyValuePtr val, BOOL checkOnly)
+{
+ DeviceVelocityPtr veloc;
+ float v, *ptr = &v;
+ int rc;
+ int nelem = 1;
+
+ if (atom != XIGetKnownProperty(ACCEL_PROP_ADAPTIVE_DECELERATION))
+ return Success;
+
+ veloc = GetDevicePredictableAccelData(dev);
+ if (!veloc)
+ return BadValue;
+ rc = XIPropToFloat(val, &nelem, &ptr);
+
+ if(checkOnly)
+ {
+ if (rc)
+ return rc;
+ return (v >= 1.0f) ? Success : BadValue;
}
+
+ if(v >= 1.0f)
+ veloc->min_acceleration = 1/v;
+
+ return Success;
+}
+
+static void
+AccelInitAdaptDecelProperty(DeviceIntPtr dev, DeviceVelocityPtr vel)
+{
+ float fval = 1.0/vel->min_acceleration;
+ Atom prop_adapt_decel = XIGetKnownProperty(ACCEL_PROP_ADAPTIVE_DECELERATION);
+
+ XIChangeDeviceProperty(dev, prop_adapt_decel, XIGetKnownProperty(XATOM_FLOAT), 32,
+ PropModeReplace, 1, &fval, FALSE);
+ XISetDevicePropertyDeletable(dev, prop_adapt_decel, FALSE);
+ XIRegisterPropertyHandler(dev, AccelSetAdaptDecelProperty, NULL, NULL);
}
/**
- * Adjust weighting decay and lut for a stage
- * The weight fn is designed so its integral 0->inf is unity, so we end
- * up with a stable (basically IIR) filter. It always draws
- * towards its more current input values, which have more weight the older
- * the last input value is.
+ * velocity scaling
*/
-void
-InitFilterStage(FilterStagePtr s, float rdecay, int lutsize)
+static int
+AccelSetScaleProperty(DeviceIntPtr dev, Atom atom,
+ XIPropertyValuePtr val, BOOL checkOnly)
{
- int x;
- float *newlut;
- float *oldlut;
-
- s->fading_lut_size = 0; /* prevent access */
-
- if(lutsize > 0){
- newlut = xalloc (sizeof(float)* lutsize);
- if(!newlut)
- return;
- for(x = 0; x < lutsize; x++)
- newlut[x] = pow(0.5, ((float)x) * rdecay);
- }else{
- newlut = NULL;
+ DeviceVelocityPtr vel;
+ float v, *ptr = &v;
+ int rc;
+ int nelem = 1;
+
+ if (atom != XIGetKnownProperty(ACCEL_PROP_VELOCITY_SCALING))
+ return Success;
+
+ vel = GetDevicePredictableAccelData(dev);
+ if (!vel)
+ return BadValue;
+ rc = XIPropToFloat(val, &nelem, &ptr);
+
+ if (checkOnly)
+ {
+ if (rc)
+ return rc;
+
+ return (v > 0) ? Success : BadValue;
}
- oldlut = s->fading_lut;
- s->fading_lut = newlut;
- s->rdecay = rdecay;
- s->fading_lut_size = lutsize;
- s->current = 0;
- if(oldlut != NULL)
- xfree(oldlut);
+
+ if(v > 0)
+ vel->corr_mul = v;
+
+ return Success;
}
+static void
+AccelInitScaleProperty(DeviceIntPtr dev, DeviceVelocityPtr vel)
+{
+ float fval = vel->corr_mul;
+ Atom prop_velo_scale = XIGetKnownProperty(ACCEL_PROP_VELOCITY_SCALING);
+
+ XIChangeDeviceProperty(dev, prop_velo_scale, XIGetKnownProperty(XATOM_FLOAT), 32,
+ PropModeReplace, 1, &fval, FALSE);
+ XISetDevicePropertyDeletable(dev, prop_velo_scale, FALSE);
+ XIRegisterPropertyHandler(dev, AccelSetScaleProperty, NULL, NULL);
+}
-static inline void
-FeedFilterChain(DeviceVelocityPtr s, float value, int tdiff)
+BOOL
+InitializePredictableAccelerationProperties(DeviceIntPtr dev)
{
- int fn;
+ DeviceVelocityPtr vel = GetDevicePredictableAccelData(dev);
- for(fn = 0; fn < MAX_VELOCITY_FILTERS; fn++){
- if(s->filters[fn].rdecay != 0)
- FeedFilterStage(&s->filters[fn], value, tdiff);
- else break;
- }
+ if(!vel)
+ return FALSE;
+
+ AccelInitProfileProperty(dev, vel);
+ AccelInitDecelProperty(dev, vel);
+ AccelInitAdaptDecelProperty(dev, vel);
+ AccelInitScaleProperty(dev, vel);
+ return TRUE;
}
+/*********************
+ * Tracking logic
+ ********************/
-static inline void
-FeedFilterStage(FilterStagePtr s, float value, int tdiff){
- float fade;
- if(tdiff < s->fading_lut_size)
- fade = s->fading_lut[tdiff];
- else
- fade = pow(0.5, ((float)tdiff) * s->rdecay);
- s->current *= fade; /* fade out old velocity */
- s->current += value * (1.0f - fade); /* and add up current */
+void
+InitTrackers(DeviceVelocityPtr vel, int ntracker)
+{
+ if(ntracker < 1){
+ ErrorF("(dix ptracc) invalid number of trackers\n");
+ return;
+ }
+ xfree(vel->tracker);
+ vel->tracker = (MotionTrackerPtr)xalloc(ntracker * sizeof(MotionTracker));
+ memset(vel->tracker, 0, ntracker * sizeof(MotionTracker));
+ vel->num_tracker = ntracker;
}
/**
- * Select the most filtered matching result. Also, the first
- * mismatching filter may be set to value (coupling).
+ * return a bit field of possible directions.
+ * 0 = N, 2 = E, 4 = S, 6 = W, in-between is as you guess.
+ * There's no reason against widening to more precise directions (<45 degrees),
+ * should it not perform well. All this is needed for is sort out non-linear
+ * motion, so precision isn't paramount. However, one should not flag direction
+ * too narrow, since it would then cut the linear segment to zero size way too
+ * often.
*/
-static inline float
-QueryFilterChain(
- DeviceVelocityPtr s,
- float value)
-{
- int fn, rfn = 0, cfn = -1;
- float cur, result = value;
-
- /* try to retrieve most integrated result 'within range'
- * Assumption: filter are in order least to most integrating */
- for(fn = 0; fn < MAX_VELOCITY_FILTERS; fn++){
- if(0.0f == s->filters[fn].rdecay)
- break;
- cur = s->filters[fn].current;
+static int
+DoGetDirection(int dx, int dy){
+ float r;
+ int i1, i2;
+ /* on insignificant mickeys, flag 135 degrees */
+ if(abs(dx) < 2 && abs(dy < 2)){
+ /* first check diagonal cases */
+ if(dx > 0 && dy > 0)
+ return 4+8+16;
+ if(dx > 0 && dy < 0)
+ return 1+2+4;
+ if(dx < 0 && dy < 0)
+ return 1+128+64;
+ if(dx < 0 && dy > 0)
+ return 16+32+64;
+ /* check axis-aligned directions */
+ if(dx > 0)
+ return 2+4+8; /*E*/
+ if(dx < 0)
+ return 128+64+32; /*W*/
+ if(dy > 0)
+ return 32+16+8; /*S*/
+ if(dy < 0)
+ return 128+1+2; /*N*/
+ return 255; /* shouldn't happen */
+ }
+ /* else, compute angle and set appropriate flags */
+#ifdef _ISOC99_SOURCE
+ r = atan2f(dy, dx);
+#else
+ r = atan2(dy, dx);
+#endif
+ /* find direction. We avoid r to become negative,
+ * since C has no well-defined modulo for such cases. */
+ r = (r+(M_PI*2.5))/(M_PI/4);
+ /* this intends to flag 2 directions (90 degrees),
+ * except on very well-aligned mickeys. */
+ i1 = (int)(r+0.1) % 8;
+ i2 = (int)(r+0.9) % 8;
+ if(i1 < 0 || i1 > 7 || i2 < 0 || i2 > 7)
+ return 255; /* shouldn't happen */
+ return 1 << i1 | 1 << i2;
+}
- if (fabs(value - cur) <= (s->coupling * (value + cur))){
- result = cur;
- rfn = fn + 1; /*remember result determining filter */
- } else if(cfn == -1){
- cfn = fn; /* remember first mismatching filter */
+#define DIRECTION_CACHE_RANGE 5
+#define DIRECTION_CACHE_SIZE (DIRECTION_CACHE_RANGE*2+1)
+
+/* cache DoGetDirection(). */
+static int
+GetDirection(int dx, int dy){
+ static int cache[DIRECTION_CACHE_SIZE][DIRECTION_CACHE_SIZE];
+ int i;
+ if (abs(dx) <= DIRECTION_CACHE_RANGE &&
+ abs(dy) <= DIRECTION_CACHE_RANGE) {
+ /* cacheable */
+ i = cache[DIRECTION_CACHE_RANGE+dx][DIRECTION_CACHE_RANGE+dy];
+ if(i != 0){
+ return i;
+ }else{
+ i = DoGetDirection(dx, dy);
+ cache[DIRECTION_CACHE_RANGE+dx][DIRECTION_CACHE_RANGE+dy] = i;
+ return i;
}
+ }else{
+ /* non-cacheable */
+ return DoGetDirection(dx, dy);
}
+}
- s->statistics.filter_usecount[rfn]++;
- DebugAccelF("(dix ptracc) result from stage %i, input %.2f, output %.2f\n",
- rfn, value, result);
+#undef DIRECTION_CACHE_RANGE
+#undef DIRECTION_CACHE_SIZE
- /* override first mismatching current (coupling) so the filter
- * catches up quickly. */
- if(cfn != -1)
- s->filters[cfn].current = result;
- return result;
-}
+/* convert offset (age) to array index */
+#define TRACKER_INDEX(s, d) (((s)->num_tracker + (s)->cur_tracker - (d)) % (s)->num_tracker)
-/********************************
- * velocity computation
- *******************************/
+static inline void
+FeedTrackers(DeviceVelocityPtr vel, int dx, int dy, int cur_t)
+{
+ int n;
+ for(n = 0; n < vel->num_tracker; n++){
+ vel->tracker[n].dx += dx;
+ vel->tracker[n].dy += dy;
+ }
+ n = (vel->cur_tracker + 1) % vel->num_tracker;
+ vel->tracker[n].dx = 0;
+ vel->tracker[n].dy = 0;
+ vel->tracker[n].time = cur_t;
+ vel->tracker[n].dir = GetDirection(dx, dy);
+ DebugAccelF("(dix prtacc) motion [dx: %i dy: %i dir:%i diff: %i]\n",
+ dx, dy, vel->tracker[n].dir,
+ cur_t - vel->tracker[vel->cur_tracker].time);
+ vel->cur_tracker = n;
+}
/**
- * return the axis if mickey is insignificant and axis-aligned,
- * -1 otherwise
- * 1 for x-axis
- * 2 for y-axis
+ * calc velocity for given tracker, with
+ * velocity scaling.
+ * This assumes linear motion.
*/
-static inline short
-GetAxis(int dx, int dy){
- if(dx == 0 || dy == 0){
- if(dx == 1 || dx == -1)
- return 1;
- if(dy == 1 || dy == -1)
- return 2;
- return -1;
- }else{
- return -1;
+static float
+CalcTracker(DeviceVelocityPtr vel, int offset, int cur_t){
+ int index = TRACKER_INDEX(vel, offset);
+ float dist = sqrt( vel->tracker[index].dx * vel->tracker[index].dx
+ + vel->tracker[index].dy * vel->tracker[index].dy);
+ int dtime = cur_t - vel->tracker[index].time;
+ if(dtime > 0)
+ return (dist / dtime);
+ else
+ return 0;/* synonymous for NaN, since we're not C99 */
+}
+
+/* find the most plausible velocity. That is, the most distant
+ * (in time) tracker which isn't too old, beyond a linear partition,
+ * or simply too much off initial velocity.
+ *
+ * May return 0.
+ */
+static float
+QueryTrackers(DeviceVelocityPtr vel, int cur_t){
+ int n, offset, dir = 255, i = -1, age_ms;
+ /* initial velocity: a low-offset, valid velocity */
+ float iveloc = 0, res = 0, tmp, vdiff;
+ float vfac = vel->corr_mul * vel->const_acceleration; /* premultiply */
+ /* loop from current to older data */
+ for(offset = 1; offset < vel->num_tracker; offset++){
+ n = TRACKER_INDEX(vel, offset);
+
+ age_ms = cur_t - vel->tracker[n].time;
+
+ /* bail out if data is too old and protect from overrun */
+ if (age_ms >= vel->reset_time || age_ms < 0) {
+ DebugAccelF("(dix prtacc) query: tracker too old\n");
+ break;
+ }
+
+ /*
+ * this heuristic avoids using the linear-motion velocity formula
+ * in CalcTracker() on motion that isn't exactly linear. So to get
+ * even more precision we could subdivide as a final step, so possible
+ * non-linearities are accounted for.
+ */
+ dir &= vel->tracker[n].dir;
+ if(dir == 0){
+ DebugAccelF("(dix prtacc) query: no longer linear\n");
+ /* instead of breaking it we might also inspect the partition after,
+ * but actual improvement with this is probably rare. */
+ break;
+ }
+
+ tmp = CalcTracker(vel, offset, cur_t) * vfac;
+
+ if ((iveloc == 0 || offset <= vel->initial_range) && tmp != 0) {
+ /* set initial velocity and result */
+ res = iveloc = tmp;
+ i = offset;
+ } else if (iveloc != 0 && tmp != 0) {
+ vdiff = fabs(iveloc - tmp);
+ if (vdiff <= vel->max_diff ||
+ vdiff/(iveloc + tmp) < vel->max_rel_diff) {
+ /* we're in range with the initial velocity,
+ * so this result is likely better
+ * (it contains more information). */
+ res = tmp;
+ i = offset;
+ }else{
+ /* we're not in range, quit - it won't get better. */
+ DebugAccelF("(dix prtacc) query: tracker too different:"
+ " old %2.2f initial %2.2f diff: %2.2f\n",
+ tmp, iveloc, vdiff);
+ break;
+ }
+ }
+ }
+ if(offset == vel->num_tracker){
+ DebugAccelF("(dix prtacc) query: last tracker in effect\n");
+ i = vel->num_tracker-1;
}
+ if(i>=0){
+ n = TRACKER_INDEX(vel, i);
+ DebugAccelF("(dix prtacc) result: offset %i [dx: %i dy: %i diff: %i]\n",
+ i,
+ vel->tracker[n].dx,
+ vel->tracker[n].dy,
+ cur_t - vel->tracker[n].time);
+ }
+ return res;
}
+#undef TRACKER_INDEX
/**
- * Perform velocity approximation
+ * Perform velocity approximation based on 2D 'mickeys' (mouse motion delta).
* return true if non-visible state reset is suggested
*/
-static short
-ProcessVelocityData(
- DeviceVelocityPtr s,
+short
+ProcessVelocityData2D(
+ DeviceVelocityPtr vel,
int dx,
int dy,
int time)
{
- float cvelocity;
-
- int diff = time - s->lrm_time;
- int cur_ax, last_ax;
- short reset = (diff >= s->reset_time);
-
- /* remember last round's result */
- s->last_velocity = s->velocity;
- cur_ax = GetAxis(dx, dy);
- last_ax = GetAxis(s->last_dx, s->last_dy);
-
- if(cur_ax != last_ax && cur_ax != -1 && last_ax != -1 && !reset){
- /* correct for the error induced when diagonal movements are
- reported as alternating axis mickeys */
- dx += s->last_dx;
- dy += s->last_dy;
- diff += s->last_diff;
- s->last_diff = time - s->lrm_time; /* prevent repeating add-up */
- DebugAccelF("(dix ptracc) axial correction\n");
- }else{
- s->last_diff = diff;
- }
+ float velocity;
- /*
- * cvelocity is not a real velocity yet, more a motion delta. constant
- * acceleration is multiplied here to make the velocity an on-screen
- * velocity (pix/t as opposed to [insert unit]/t). This is intended to
- * make multiple devices with widely varying ConstantDecelerations respond
- * similar to acceleration controls.
- */
- cvelocity = (float)sqrt(dx*dx + dy*dy) * s->const_acceleration;
-
- s->lrm_time = time;
-
- if (s->reset_time < 0 || diff < 0) { /* reset disabled or timer overrun? */
- /* simply set velocity from current movement, no reset. */
- s->velocity = cvelocity;
- return FALSE;
- }
+ vel->last_velocity = vel->velocity;
- if (diff == 0)
- diff = 1; /* prevent div-by-zero, though it shouldn't happen anyway*/
+ FeedTrackers(vel, dx, dy, time);
- /* translate velocity to dots/ms (somewhat intractable in integers,
- so we multiply by some per-device adjustable factor) */
- cvelocity = cvelocity * s->corr_mul / (float)diff;
+ velocity = QueryTrackers(vel, time);
- /* short-circuit: when nv-reset the rest can be skipped */
- if(reset == TRUE){
- /*
- * we don't really have a velocity here, since diff includes inactive
- * time. This is dealt with in ComputeAcceleration.
- */
- StuffFilterChain(s, cvelocity);
- s->velocity = s->last_velocity = cvelocity;
- s->last_reset = TRUE;
- DebugAccelF("(dix ptracc) non-visible state reset\n");
- return TRUE;
- }
-
- if(s->last_reset == TRUE){
- /*
- * when here, we're probably processing the second mickey of a starting
- * stroke. This happens to be the first time we can reasonably pretend
- * that cvelocity is an actual velocity. Thus, to opt precision, we
- * stuff that into the filter chain.
- */
- s->last_reset = FALSE;
- DebugAccelF("(dix ptracc) after-reset vel:%.3f\n", cvelocity);
- StuffFilterChain(s, cvelocity);
- s->velocity = cvelocity;
- return FALSE;
- }
-
- /* feed into filter chain */
- FeedFilterChain(s, cvelocity, diff);
-
- /* perform coupling and decide final value */
- s->velocity = QueryFilterChain(s, cvelocity);
-
- DebugAccelF("(dix ptracc) guess: vel=%.3f diff=%d %i|%i|%i|%i|%i|%i|%i|%i|%i\n",
- s->velocity, diff,
- s->statistics.filter_usecount[0], s->statistics.filter_usecount[1],
- s->statistics.filter_usecount[2], s->statistics.filter_usecount[3],
- s->statistics.filter_usecount[4], s->statistics.filter_usecount[5],
- s->statistics.filter_usecount[6], s->statistics.filter_usecount[7],
- s->statistics.filter_usecount[8]);
- return FALSE;
+ vel->velocity = velocity;
+ return velocity == 0;
}
-
/**
* this flattens significant ( > 1) mickeys a little bit for more steady
* constant-velocity response
@@ -440,41 +594,42 @@ ApplySimpleSoftening(int od, int d)
static void
ApplySofteningAndConstantDeceleration(
- DeviceVelocityPtr s,
+ DeviceVelocityPtr vel,
int dx,
int dy,
float* fdx,
float* fdy,
short do_soften)
{
- if (do_soften && s->use_softening) {
- *fdx = ApplySimpleSoftening(s->last_dx, dx);
- *fdy = ApplySimpleSoftening(s->last_dy, dy);
+ if (do_soften && vel->use_softening) {
+ *fdx = ApplySimpleSoftening(vel->last_dx, dx);
+ *fdy = ApplySimpleSoftening(vel->last_dy, dy);
} else {
*fdx = dx;
*fdy = dy;
}
- *fdx *= s->const_acceleration;
- *fdy *= s->const_acceleration;
+ *fdx *= vel->const_acceleration;
+ *fdy *= vel->const_acceleration;
}
/*
* 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;
}
@@ -483,17 +638,16 @@ BasicComputeAcceleration(
*/
static float
ComputeAcceleration(
+ DeviceIntPtr dev,
DeviceVelocityPtr vel,
float threshold,
float acc){
float res;
- if(vel->last_reset){
+ if(vel->velocity <= 0){
DebugAccelF("(dix ptracc) profile skipped\n");
/*
- * This is intended to override the first estimate of a stroke,
- * which is too low (see ProcessVelocityData). 1 should make sure
- * the mickey is seen on screen.
+ * If we have no idea about device velocity, don't pretend it.
*/
return 1;
}
@@ -503,9 +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;
@@ -513,7 +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;
@@ -530,7 +687,8 @@ ComputeAcceleration(
*/
static float
PolynomialAccelerationProfile(
- DeviceVelocityPtr pVel,
+ DeviceIntPtr dev,
+ DeviceVelocityPtr vel,
float velocity,
float ignored,
float acc)
@@ -545,18 +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);
@@ -574,7 +735,8 @@ ClassicProfile(
*/
static float
PowerProfile(
- DeviceVelocityPtr pVel,
+ DeviceIntPtr dev,
+ DeviceVelocityPtr vel,
float velocity,
float threshold,
float acc)
@@ -584,9 +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;
}
@@ -611,7 +773,8 @@ CalcPenumbralGradient(float x){
*/
static float
SimpleSmoothProfile(
- DeviceVelocityPtr pVel,
+ DeviceIntPtr dev,
+ DeviceVelocityPtr vel,
float velocity,
float threshold,
float acc)
@@ -636,7 +799,8 @@ SimpleSmoothProfile(
*/
static float
SmoothLinearProfile(
- DeviceVelocityPtr pVel,
+ DeviceIntPtr dev,
+ DeviceVelocityPtr vel,
float velocity,
float threshold,
float acc)
@@ -659,14 +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)
@@ -675,60 +840,73 @@ LinearProfile(
}
-/**
- * Set the profile by number.
- * Intended to make profiles exchangeable at runtime.
- * If you created a profile, give it a number here and in the header to
- * make it selectable. In case some profile-specific init is needed, here
- * would be a good place, since FreeVelocityData() also calls this with -1.
- * returns FALSE (0) if profile number is unavailable.
- */
-_X_EXPORT int
-SetAccelerationProfile(
- DeviceVelocityPtr s,
+static float
+NoProfile(
+ DeviceIntPtr dev,
+ DeviceVelocityPtr vel,
+ float velocity,
+ float threshold,
+ float acc)
+{
+ return 1.0f;
+}
+
+static PointerAccelerationProfileFunc
+GetAccelerationProfile(
+ DeviceVelocityPtr vel,
int profile_num)
{
- PointerAccelerationProfileFunc profile;
switch(profile_num){
- case -1:
- profile = NULL; /* Special case to uninit properly */
- break;
case AccelProfileClassic:
- profile = ClassicProfile;
- break;
+ return ClassicProfile;
case AccelProfileDeviceSpecific:
- if(NULL == s->deviceSpecificProfile)
- return FALSE;
- profile = s->deviceSpecificProfile;
- break;
+ return vel->deviceSpecificProfile;
case AccelProfilePolynomial:
- profile = PolynomialAccelerationProfile;
- break;
+ return PolynomialAccelerationProfile;
case AccelProfileSmoothLinear:
- profile = SmoothLinearProfile;
- break;
+ return SmoothLinearProfile;
case AccelProfileSimple:
- profile = SimpleSmoothProfile;
- break;
+ return SimpleSmoothProfile;
case AccelProfilePower:
- profile = PowerProfile;
- break;
+ return PowerProfile;
case AccelProfileLinear:
- profile = LinearProfile;
- break;
- case AccelProfileReserved:
- /* reserved for future use, e.g. a user-defined profile */
+ return LinearProfile;
+ case AccelProfileNone:
+ return NoProfile;
default:
- return FALSE;
+ return NULL;
}
- if(s->profile_private != NULL){
+}
+
+/**
+ * Set the profile by number.
+ * Intended to make profiles exchangeable at runtime.
+ * If you created a profile, give it a number here and in the header to
+ * make it selectable. In case some profile-specific init is needed, here
+ * would be a good place, since FreeVelocityData() also calls this with
+ * PROFILE_UNINITIALIZE.
+ *
+ * returns FALSE if profile number is unavailable, TRUE otherwise.
+ */
+int
+SetAccelerationProfile(
+ DeviceVelocityPtr vel,
+ int profile_num)
+{
+ PointerAccelerationProfileFunc profile;
+ profile = GetAccelerationProfile(vel, profile_num);
+
+ if(profile == NULL && profile_num != PROFILE_UNINITIALIZE)
+ return FALSE;
+
+ if(vel->profile_private != NULL){
/* Here one could free old profile-private data */
- xfree(s->profile_private);
- s->profile_private = NULL;
+ xfree(vel->profile_private);
+ vel->profile_private = NULL;
}
/* Here one could init profile-private data */
- s->Profile = profile;
- s->statistics.profile_number = profile_num;
+ vel->Profile = profile;
+ vel->statistics.profile_number = profile_num;
return TRUE;
}
@@ -746,34 +924,34 @@ SetAccelerationProfile(
* it should do init/uninit in the driver (ie. with DEVICE_INIT and friends).
* Users may override or choose it.
*/
-_X_EXPORT void
+void
SetDeviceSpecificAccelerationProfile(
- DeviceVelocityPtr s,
+ DeviceVelocityPtr vel,
PointerAccelerationProfileFunc profile)
{
- if(s)
- s->deviceSpecificProfile = profile;
+ if(vel)
+ vel->deviceSpecificProfile = profile;
}
/**
* Use this function to obtain a DeviceVelocityPtr for a device. Will return NULL if
* the predictable acceleration scheme is not in effect.
*/
-_X_EXPORT DeviceVelocityPtr
+DeviceVelocityPtr
GetDevicePredictableAccelData(
- DeviceIntPtr pDev)
+ DeviceIntPtr dev)
{
/*sanity check*/
- if(!pDev){
+ if(!dev){
ErrorF("[dix] accel: DeviceIntPtr was NULL");
return NULL;
}
- if( pDev->valuator &&
- pDev->valuator->accelScheme.AccelSchemeProc ==
+ if( dev->valuator &&
+ dev->valuator->accelScheme.AccelSchemeProc ==
acceleratePointerPredictable &&
- pDev->valuator->accelScheme.accelData != NULL){
+ dev->valuator->accelScheme.accelData != NULL){
- return (DeviceVelocityPtr)pDev->valuator->accelScheme.accelData;
+ return (DeviceVelocityPtr)dev->valuator->accelScheme.accelData;
}
return NULL;
}
@@ -789,7 +967,7 @@ GetDevicePredictableAccelData(
*/
void
acceleratePointerPredictable(
- DeviceIntPtr pDev,
+ DeviceIntPtr dev,
int first_valuator,
int num_valuators,
int *valuators,
@@ -799,12 +977,18 @@ acceleratePointerPredictable(
int dx = 0, dy = 0;
int *px = NULL, *py = NULL;
DeviceVelocityPtr velocitydata =
- (DeviceVelocityPtr) pDev->valuator->accelScheme.accelData;
- float fdx, fdy; /* no need to init */
+ (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];
@@ -815,40 +999,41 @@ acceleratePointerPredictable(
}
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;
+ /* reset non-visible state? */
+ if (ProcessVelocityData2D(velocitydata, dx , dy, evtime)) {
+ soften = FALSE;
}
- if (pDev->ptrfeed && pDev->ptrfeed->ctrl.num) {
+ if (dev->ptrfeed && dev->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);
+ 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);
+ dx, dy,
+ &fdx, &fdy,
+ (mult > 1.0) && soften);
+
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;
+ 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) {
- 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;
+ 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);
}
}
}
@@ -865,7 +1050,7 @@ acceleratePointerPredictable(
*/
void
acceleratePointerLightweight(
- DeviceIntPtr pDev,
+ DeviceIntPtr dev,
int first_valuator,
int num_valuators,
int *valuators,
@@ -890,48 +1075,48 @@ acceleratePointerLightweight(
if (!dx && !dy)
return;
- if (pDev->ptrfeed && pDev->ptrfeed->ctrl.num) {
+ if (dev->ptrfeed && dev->ptrfeed->ctrl.num) {
/* modeled from xf86Events.c */
- if (pDev->ptrfeed->ctrl.threshold) {
- if ((abs(dx) + abs(dy)) >= pDev->ptrfeed->ctrl.threshold) {
- pDev->last.remainder[0] = ((float)dx *
- (float)(pDev->ptrfeed->ctrl.num)) /
- (float)(pDev->ptrfeed->ctrl.den) +
- pDev->last.remainder[0];
+ if (dev->ptrfeed->ctrl.threshold) {
+ if ((abs(dx) + abs(dy)) >= dev->ptrfeed->ctrl.threshold) {
+ dev->last.remainder[0] = ((float)dx *
+ (float)(dev->ptrfeed->ctrl.num)) /
+ (float)(dev->ptrfeed->ctrl.den) +
+ dev->last.remainder[0];
if (px) {
- *px = (int)pDev->last.remainder[0];
- pDev->last.remainder[0] = pDev->last.remainder[0] -
+ *px = (int)dev->last.remainder[0];
+ dev->last.remainder[0] = dev->last.remainder[0] -
(float)(*px);
}
- pDev->last.remainder[1] = ((float)dy *
- (float)(pDev->ptrfeed->ctrl.num)) /
- (float)(pDev->ptrfeed->ctrl.den) +
- pDev->last.remainder[1];
+ dev->last.remainder[1] = ((float)dy *
+ (float)(dev->ptrfeed->ctrl.num)) /
+ (float)(dev->ptrfeed->ctrl.den) +
+ dev->last.remainder[1];
if (py) {
- *py = (int)pDev->last.remainder[1];
- pDev->last.remainder[1] = pDev->last.remainder[1] -
+ *py = (int)dev->last.remainder[1];
+ dev->last.remainder[1] = dev->last.remainder[1] -
(float)(*py);
}
}
}
else {
mult = pow((float)dx * (float)dx + (float)dy * (float)dy,
- ((float)(pDev->ptrfeed->ctrl.num) /
- (float)(pDev->ptrfeed->ctrl.den) - 1.0) /
+ ((float)(dev->ptrfeed->ctrl.num) /
+ (float)(dev->ptrfeed->ctrl.den) - 1.0) /
2.0) / 2.0;
if (dx) {
- pDev->last.remainder[0] = mult * (float)dx +
- pDev->last.remainder[0];
- *px = (int)pDev->last.remainder[0];
- pDev->last.remainder[0] = pDev->last.remainder[0] -
+ dev->last.remainder[0] = mult * (float)dx +
+ dev->last.remainder[0];
+ *px = (int)dev->last.remainder[0];
+ dev->last.remainder[0] = dev->last.remainder[0] -
(float)(*px);
}
if (dy) {
- pDev->last.remainder[1] = mult * (float)dy +
- pDev->last.remainder[1];
- *py = (int)pDev->last.remainder[1];
- pDev->last.remainder[1] = pDev->last.remainder[1] -
+ dev->last.remainder[1] = mult * (float)dy +
+ dev->last.remainder[1];
+ *py = (int)dev->last.remainder[1];
+ dev->last.remainder[1] = dev->last.remainder[1] -
(float)(*py);
}
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-05 18:58:31 +0000