path: root/meta/recipes-graphics/tslib/tslib/multievent.patch

Upstream-Status: Pending

--- tslib/plugins/linear.c~multievent
+++ tslib/plugins/linear.c
@@ -39,14 +39,12 @@
 linear_read(struct tslib_module_info *info, struct ts_sample *samp, int nr)
 {
 	struct tslib_linear *lin = (struct tslib_linear *)info;
-	int ret;
+	int ret, i = 0;
 	int xtemp,ytemp;
 
 	ret = info->next->ops->read(info->next, samp, nr);
 	if (ret >= 0) {
-		int nr;
-
-		for (nr = 0; nr < ret; nr++, samp++) {
+		for (i = 0; i < ret; i++, samp++) {
 #ifdef DEBUG
 			fprintf(stderr,"BEFORE CALIB--------------------> %d %d %d\n",samp->x, samp->y, samp->pressure);
 #endif /*DEBUG*/
@@ -66,6 +64,7 @@
 				samp->y = tmp;
 			}
 		}
+		ret = i;
 	}
 
 	return ret;
--- tslib/plugins/dejitter.c~multievent
+++ tslib/plugins/dejitter.c
@@ -24,7 +24,6 @@
 
 struct tslib_threshold {
 	struct tslib_module_info	module;
-	int			pthreshold;
 	int			xdelta;
 	int			ydelta;
 	int			delta2;
@@ -36,40 +35,28 @@
 static int threshold_read(struct tslib_module_info *info, struct ts_sample *samp, int nr)
 {
 	struct tslib_threshold *thr = (struct tslib_threshold *)info;
-	struct ts_sample *s;
-	int ret;
+	struct ts_sample *src = samp, *dest = samp;
+	int ret, i = 0;
 
 	ret = info->next->ops->read(info->next, samp, nr);
 	if (ret >= 0) {
-		int nr = 0;
-
-		for (s = samp; s < samp + ret; s++) {
+		for (i = 0; i < ret; i++, samp++) {
 			int dr2;
 #ifdef DEBUG
-			fprintf(stderr,"BEFORE DEJITTER---------------> %d %d %d\n",s->x,s->y,s->pressure);
+			fprintf(stderr,"BEFORE DEJITTER---------------> %d %d %d\n", samp->x, samp->y, samp->pressure);
 #endif /*DEBUG*/
-			thr->down = (s->pressure >= thr->pthreshold);
-			if (thr->down) {
-				dr2 = (thr->x - s->x)*(thr->x - s->x) 
-					+ (thr->y - s->y)*(thr->y - s->y);
-				if(dr2 < thr->delta2) {
-					s->x = thr->x;
-					s->y = thr->y;
-				} else {
-					thr->x = s->x;
-					thr->y = s->y;
-				}
-
+			dr2 = (thr->x - samp->x)*(thr->x - samp->x) 
+				+ (thr->y - samp->y)*(thr->y - samp->y);
+			if(dr2 < thr->delta2) {
+				samp->x = thr->x;
+				samp->y = thr->y;
 			} else {
-				s->x = thr->x;
-				s->y = thr->y;
+				thr->x = samp->x;
+				thr->y = samp->y;
 			}
-
-
-			samp[nr++] = *s;
 		}
 
-		ret = nr;
+		ret = i;
 	}
 	return ret;
 }
@@ -106,10 +93,6 @@
 		thr->ydelta = v;
 		break;
 
-	case 3:
-		thr->pthreshold = v;
-		break;
-
 	default:
 		return -1;
 	}
@@ -120,7 +103,6 @@
 {
 	{ "xdelta",	(void *)1, threshold_limit },
 	{ "ydelta",	(void *)2, threshold_limit },
-	{ "pthreshold",	(void *)3, threshold_limit }
 };
 
 //#define NR_VARS (sizeof(threshold_vars) / sizeof(threshold_vars[0]))
@@ -138,7 +120,6 @@
 
 	thr->xdelta = 10;
 	thr->ydelta = 10;
-	thr->pthreshold = 100;
 
 	if (tslib_parse_vars(&thr->module, threshold_vars, NR_VARS, params)) {
 		free(thr);
--- tslib/plugins/variance.c~multievent
+++ tslib/plugins/variance.c
@@ -9,25 +9,36 @@
  * $Id: variance.c,v 1.3 2002/11/08 23:28:55 dlowder Exp $
  *
  * Variance filter for touchscreen values
+ *
+ * Policy question (applies to all tslib modules that consume events):
+ * 	1) User requests a read of 5 events using nr.
+ * 	2) Lower layers return us 4 events.
+ * 	3) Perform variance calculation, we now only have _1_ event.
+ * 	4) Do we, a) duplicate this data across the user requested 4 events,
+ * 		  b) push up the single event
+ * 		  c) loop on the read from the lower layers to obtain
+ * 		     the user's requested number of events, unless we hit
+ * 		     a pen_up.
  */
+
 #include <errno.h>
 #include <stdlib.h>
 #include <string.h>
 #include <limits.h>
-
 #include <stdio.h>
 
 #include "tslib.h"
 #include "tslib-filter.h"
 
+#define NR_INIT -1
 #define NR_LAST	4
 
 struct tslib_variance {
 	struct tslib_module_info	module;
 	int				nr;
-	unsigned int			pthreshold;
 	unsigned int			xlimit;
 	unsigned int			ylimit;
+	unsigned int			pthreshold;
 	struct ts_sample		last[NR_LAST];
 };
 
@@ -37,8 +48,7 @@
  * least variance, and average them.
  */
 static int
-variance_calculate(struct tslib_variance *var, struct ts_sample *samp,
-		   struct ts_sample *s)
+variance_calculate(struct tslib_variance *var, struct ts_sample *dest, struct ts_sample *src)
 {
 	int i, j;
 	int diff_x, min_x, i_x, j_x;
@@ -100,11 +110,11 @@
 		}
 	}
 
-	samp->x		 = (var->last[i_x].x + var->last[j_x].x) / 2;
-	samp->y		 = (var->last[i_y].y + var->last[j_y].y) / 2;
-	samp->pressure   = (var->last[i_p].pressure + var->last[j_p].pressure) / 2;
-	samp->tv.tv_sec  = s->tv.tv_sec;
-	samp->tv.tv_usec = s->tv.tv_usec;
+	dest->x		 = (var->last[i_x].x + var->last[j_x].x) / 2;
+	dest->y		 = (var->last[i_y].y + var->last[j_y].y) / 2;
+	dest->pressure   = (var->last[i_p].pressure + var->last[j_p].pressure) / 2;
+	dest->tv.tv_sec  = src->tv.tv_sec;
+	dest->tv.tv_usec = src->tv.tv_usec;
 
 	return 1;
 }
@@ -112,55 +122,57 @@
 static int variance_read(struct tslib_module_info *info, struct ts_sample *samp, int nr)
 {
 	struct tslib_variance *var = (struct tslib_variance *)info;
-	struct ts_sample *s;
-	int ret;
-
-	ret = info->next->ops->read(info->next, samp, nr);
-	if (ret >= 0) {
-		int nr = 0;
-
-		for (s = samp; s < samp + ret; s++) {
-			if (s->pressure < var->pthreshold) {
-				/*
-				 * Pen was released.  Reset our state and
-				 * pass up the release information.
-				 */
-//				samp[nr].x = 0;
-//				samp[nr].y = 0;
-				samp[nr].pressure = s->pressure;
-				samp[nr].tv.tv_sec = s->tv.tv_sec;
-				samp[nr].tv.tv_usec = s->tv.tv_usec;
-
-				nr++;
-
-				var->nr = 0;
-				continue;
-			} else if (var->nr == -1) {
-				/*
-				 * Pen was pressed.  Inform upper layers
-				 * immediately.
-				 */
-				samp[nr] = *s;
-				nr++;
-			}
-
-			if (var->nr >= 0) {
-				var->last[var->nr].x = s->x;
-				var->last[var->nr].y = s->y;
-				var->last[var->nr].pressure = s->pressure;
-			}
-
-			var->nr++;
+	struct ts_sample *src = samp, *dest = samp;
+	int ret, i = 0;
 
-			if (var->nr == NR_LAST) {
-				if (variance_calculate(var, samp + nr, s))
-					nr++;
-				var->nr = 0;
+	/*
+	 * NOTES:
+	 *
+	 * Loop on read, collecting events until we hit nr, unless
+	 * we hit a pen up or encounter a failure.
+	 */
+	while ((i < nr) && (ret != -1)) {
+		ret = info->next->ops->read(info->next, dest + i, nr - i);
+		if (ret >= 0) {
+			for (src = dest + i; src < dest + ret; src++) {
+				if (src->pressure < var->pthreshold) {
+					/* pen released, reset var->nr,
+					 * do a calc based on what we have so
+					 * far, and let this event flow up */
+					if (variance_calculate(var, dest + i, src))
+						i++;
+					var->nr = NR_INIT;
+					ret = -1; /* break outer loop, push up event */
+					break;
+				} else if (var->nr == NR_INIT) {
+					/*
+					 * First pen down event. Inform upper layers
+					 * immediately for responsiveness.
+					 */
+					var->nr = 0;
+					i++;
+					ret = -1; /* break outer loop */
+					break;
+				}
+	
+				if (var->nr >= 0) {
+					var->last[var->nr].x = src->x;
+					var->last[var->nr].y = src->y;
+					var->last[var->nr].pressure = src->pressure;
+				}
+	
+				var->nr++;
+	
+				if (var->nr == NR_LAST) {
+					if (variance_calculate(var, dest + i, src))
+						i++;
+					var->nr = 0;
+				}
 			}
 		}
-
-		ret = nr;
 	}
+	/* if we've collected at least one event, send it up */
+	if (i != 0) ret = i;
 	return ret;
 }
 
@@ -196,10 +208,6 @@
 		var->ylimit = v;
 		break;
 
-	case 3:
-		var->pthreshold = v;
-		break;
-
 	default:
 		return -1;
 	}
@@ -210,7 +218,6 @@
 {
 	{ "xlimit",	(void *)1, variance_limit },
 	{ "ylimit",	(void *)2, variance_limit },
-	{ "pthreshold",	(void *)3, variance_limit }
 };
 
 #define NR_VARS (sizeof(variance_vars) / sizeof(variance_vars[0]))
@@ -218,6 +225,7 @@
 struct tslib_module_info *mod_init(struct tsdev *dev, const char *params)
 {
 	struct tslib_variance *var;
+	char *pthresvar;
 
 	var = malloc(sizeof(struct tslib_variance));
 	if (var == NULL)
@@ -225,10 +233,15 @@
 
 	var->module.ops = &variance_ops;
 
-	var->nr = -1;
+	var->nr = NR_INIT;
 	var->xlimit = 160;
 	var->ylimit = 160;
 	var->pthreshold = 100;
+	pthresvar = getenv("TSLIB_PTHRES");
+	if (pthresvar != NULL) {
+		int p = strtol(pthresvar, (char **)NULL, 10);
+		if (p != -1) var->pthreshold = p;
+	}
 
 	if (tslib_parse_vars(&var->module, variance_vars, NR_VARS, params)) {
 		free(var);
--- tslib/README~multievent
+++ tslib/README
@@ -36,6 +36,19 @@
 usages.  They are by no means exhaustive, nor probably even good examples.
 They are basically the programs I used to test this library.
 
+Module Creation Notes
+=====================
+
+For those creating tslib modules, it is important to note a couple things with
+regard to handling of the ability for a user to request more than one ts event
+at a time.  The first thing to note is that the lower layers may send up less
+events than the user requested, but only if that was a result of a pen release.
+Next, your module should send up just as many events as the user requested in
+nr.  If your module is one that consumes events, such as variance, then you
+loop on the read from the lower layers, and only send the events up when
+1) you have the number of events requested by the user, or 2) one of the events
+from the lower layers was a pen release.
+
 
 Module Parameters
 =================
--- tslib/src/ts_read_raw.c~multievent
+++ tslib/src/ts_read_raw.c
@@ -14,10 +14,10 @@
  *
  * Read raw pressure, x, y, and timestamp from a touchscreen device.
  */
+
 #include "config.h"
 
 #include <stdio.h>
-
 #include <stdlib.h>
 #ifdef HAVE_UNISTD_H
 #include <unistd.h>
@@ -25,79 +25,27 @@
 #include <sys/time.h>
 #include <sys/types.h>
 
-#ifdef USE_INPUT_API
-#include <linux/input.h>
-#else
-struct ts_event  {   /* Used in UCB1x00 style touchscreens (the default) */
-	unsigned short pressure;
-	unsigned short x;
-	unsigned short y;
-	unsigned short pad;
-	struct timeval stamp;
-};
-struct h3600_ts_event { /* Used in the Compaq IPAQ */
-	unsigned short pressure;
-	unsigned short x;
-	unsigned short y;
-	unsigned short pad;
-};
-struct mk712_ts_event { /* Used in the Hitachi Webpad */
-	unsigned int header;
-	unsigned int x;
-	unsigned int y;
-	unsigned int reserved;
-};
-struct arctic2_ts_event { /* Used in the IBM Arctic II */
-	signed short pressure;
-	signed int x;
-	signed int y;
-	int millisecs;
-	int flags;
-};
-struct collie_ts_event { /* Used in the Sharp Zaurus SL-5000d and SL-5500 */
-	long y;
-	long x;
-	long pressure;
-	long long millisecs;
-};
-struct corgi_ts_event { /* Used in the Sharp Zaurus SL-C700 */
-	short pressure;
-	short x;
-	short y;
-	short millisecs;
-};
-#endif /* USE_INPUT_API */
-
 #include "tslib-private.h"
 
-int ts_read_raw(struct tsdev *ts, struct ts_sample *samp, int nr)
-{
 #ifdef USE_INPUT_API
+#include <linux/input.h>
+
+static inline int get_input_event(struct tsdev *ts, struct ts_sample *samp) {
 	struct input_event ev;
-#else
-	struct ts_event *evt;
-	struct h3600_ts_event *hevt;
-	struct mk712_ts_event *mevt;
-	struct arctic2_ts_event *aevt;
-	struct collie_ts_event *collie_evt;
-	struct corgi_ts_event *corgi_evt;
-#endif /* USE_INPUT_API */
-	int ret;
-	int total = 0;
+	struct timeval tv = {0, 0};
+	fd_set fdset;
+	int ret = 0;
 
-	char *tseventtype=NULL;
-	char *defaulttseventtype="UCB1x00";
+	/* event vars */
+	static int curr_x = 0, curr_y = 0;
+	int curr_p = 0, next_x = 0, next_y = 0;
 
-#ifdef USE_INPUT_API
-	/* warning: maybe those static vars should be part of the tsdev struct? */
-	static int curr_x = 0, curr_y = 0, curr_p = 0;
-	static int got_curr_x = 0, got_curr_y = 0;
-	int got_curr_p = 0;
-	int next_x, next_y;
+	/* state variables */
+	int got_curr_x = 0, got_curr_y = 0, got_curr_p = 0;
 	int got_next_x = 0, got_next_y = 0;
 	int got_tstamp = 0;
 
-	while (total < nr) {
+	while (1) {
 		ret = read(ts->fd, &ev, sizeof(struct input_event));
 		if (ret < sizeof(struct input_event)) break;
 
@@ -146,177 +94,231 @@
 			samp->tv = ev.time;
 		}
 
-		if ( (!got_curr_x || !got_curr_y) && !got_curr_p &&
-		     !got_next_x && !got_next_y ) {
-			/*
-			 * The current event is not complete yet.
-			 * Give the kernel a chance to feed us more.
-			 */
-			struct timeval tv = {0, 0};
-			fd_set fdset;
-			FD_ZERO(&fdset);
-			FD_SET(ts->fd, &fdset);
-			ret = select(ts->fd+1, &fdset, NULL, NULL, &tv);
-		       	if (ret == 1) continue;
-			if (ret == -1) break;
+		if (got_curr_x && got_curr_y && got_curr_p) {
+			/* we have a complete event */
+			samp->x = curr_x;
+			samp->y = curr_y;
+			samp->pressure = curr_p;
+			ret = 0; /* indicate success */
+			if (got_next_x) curr_x = next_x;
+			if (got_next_y) curr_y = next_y;
+			break;
 		}
 
-		/* We consider having a complete ts event */
-		samp->x = curr_x;
-		samp->y = curr_y;
-		samp->pressure = curr_p;
-#ifdef DEBUG
-        fprintf(stderr,"RAW---------------------------> %d %d %d\n",samp->x,samp->y,samp->pressure);
-#endif /*DEBUG*/
-		samp++;
-		total++;
-        
-		/* get ready for next event */
-		if (got_next_x) curr_x = next_x; else got_curr_x = 0;
-		if (got_next_y) curr_y = next_y; else got_curr_y = 0;
-		got_next_x = got_next_y = got_tstamp = 0;
+		/*
+		 * The current event is not complete yet.
+		 * Give the kernel a chance to feed us more.
+		 */
+		FD_ZERO(&fdset);
+		FD_SET(ts->fd, &fdset);
+		ret = select(ts->fd+1, &fdset, NULL, NULL, &tv);
+	       	if (ret == 1) continue;
+		if (ret == -1) break;
 	}
 
-	if (ret) ret = -1;
-	if (total) ret = total;
+//	fprintf(stdout, "%s: returning %d\n", __FUNCTION__, ret);
+	if (ret != 0) ret = -1;
+	return ret;
+}
+
 #else
+
+struct ucb1x00_ts_event  {   /* Used in UCB1x00 style touchscreens (the default) */
+	unsigned short pressure;
+	unsigned short x;
+	unsigned short y;
+	unsigned short pad;
+	struct timeval stamp;
+};
+struct h3600_ts_event { /* Used in the Compaq IPAQ */
+	unsigned short pressure;
+	unsigned short x;
+	unsigned short y;
+	unsigned short pad;
+};
+struct mk712_ts_event { /* Used in the Hitachi Webpad */
+	unsigned int header;
+	unsigned int x;
+	unsigned int y;
+	unsigned int reserved;
+};
+struct arctic2_ts_event { /* Used in the IBM Arctic II */
+	signed short pressure;
+	signed int x;
+	signed int y;
+	int millisecs;
+	int flags;
+};
+struct collie_ts_event { /* Used in the Sharp Zaurus SL-5000d and SL-5500 */
+	long y;
+	long x;
+	long pressure;
+	long long millisecs;
+};
+struct corgi_ts_event { /* Used in the Sharp Zaurus SL-C700 */
+	short pressure;
+	short x;
+	short y;
+	short millisecs;
+};
+
+static inline int get_ucb1x00_event(struct tsdev *ts, struct ts_sample *samp) {
+	struct ucb1x00_ts_event evt;
+	int ret = read(ts->fd, &evt, sizeof(struct ucb1x00_ts_event));
+	if (ret > 0) {
+		samp->x = evt.x;
+		samp->y = evt.y;
+		samp->pressure = evt.pressure;
+		samp->tv.tv_usec = evt.stamp.tv_usec;
+		samp->tv.tv_sec = evt.stamp.tv_sec;
+		ret = 0; /* success */
+	}
+	return ret;
+}
+
+static inline int get_h3600_event(struct tsdev *ts, struct ts_sample *samp) {
+	struct h3600_ts_event evt;
+	int ret = read(ts->fd, &evt, sizeof(struct h3600_ts_event));
+	if (ret > 0) {
+		samp->x = evt.x;
+		samp->y = evt.y;
+		samp->pressure = evt.pressure;
+		gettimeofday(&samp->tv, NULL);
+		ret = 0; /* success */
+	}
+	return ret;
+}
+
+static inline int get_mk712_event(struct tsdev *ts, struct ts_sample *samp) {
+	struct mk712_ts_event evt;
+	int ret = read(ts->fd, &evt, sizeof(struct mk712_ts_event));
+	if (ret > 0) {
+		samp->x = (short)evt.x;
+		samp->y = (short)evt.y;
+		if(evt.header==0)
+			samp->pressure=1;
+		else
+			samp->pressure=0;
+		gettimeofday(&samp->tv, NULL);
+		ret = 0; /* success */
+	}
+	return ret;
+}
+
+static inline int get_arctic2_event(struct tsdev *ts, struct ts_sample *samp) {
+	struct arctic2_ts_event evt;
+	int ret = read(ts->fd, &evt, sizeof(struct arctic2_ts_event));
+	if (ret > 0) {
+		samp->x = (short)evt.x;
+		samp->y = (short)evt.y;
+		samp->pressure = evt.pressure;
+		gettimeofday(&samp->tv, NULL);
+		ret = 0; /* success */
+	}
+	return ret;
+}
+
+static inline int get_collie_event(struct tsdev *ts, struct ts_sample *samp) {
+	struct collie_ts_event evt;
+	int ret = read(ts->fd, &evt, sizeof(struct collie_ts_event));
+	if (ret > 0) {
+		samp->x = evt.x;
+		samp->y = evt.y;
+		samp->pressure = evt.pressure;
+		samp->tv.tv_usec = evt.millisecs % 1000;
+		samp->tv.tv_sec = evt.millisecs / 1000;
+		ret = 0; /* success */
+	}
+	return ret;
+}
+
+static inline int get_corgi_event(struct tsdev *ts, struct ts_sample *samp) {
+	struct corgi_ts_event evt;
+	int ret = read(ts->fd, &evt, sizeof(struct corgi_ts_event));
+	if (ret > 0) {
+		samp->x = evt.x;
+		samp->y = evt.y;
+		samp->pressure = evt.pressure;
+		samp->tv.tv_usec = evt.millisecs % 1000;
+		samp->tv.tv_sec = evt.millisecs / 1000;
+		ret = 0; /* success */
+	}
+	return ret;
+}
+
+#endif
+
+int ts_read_raw(struct tsdev *ts, struct ts_sample *samp, int nr)
+{
+	int ret;
+	int total = 0;
+	int pen_down = 1;
+	static short x_save = 0, y_save = 0;
+	static int pthres = -1;
+
+#ifndef USE_INPUT_API
+	char *tseventtype=NULL;
+	char *defaulttseventtype="UCB1x00";
 	tseventtype = getenv("TSLIB_TSEVENTTYPE");
 	if(tseventtype==NULL) tseventtype=defaulttseventtype;
+#endif
 
-	if( strcmp(tseventtype,"H3600") == 0) { /* iPAQ style h3600 touchscreen events */
-		hevt = alloca(sizeof(*hevt) * nr);
-		ret = read(ts->fd, hevt, sizeof(*hevt) * nr);
-		if(ret > 0) {
-			int nr = ret / sizeof(*hevt);
-			while(ret >= sizeof(*hevt)) {
-				samp->x = hevt->x;
-				samp->y = hevt->y;
-				samp->pressure = hevt->pressure;
-#ifdef DEBUG
-        fprintf(stderr,"RAW---------------------------> %d %d %d\n",samp->x,samp->y,samp->pressure);
-#endif /*DEBUG*/
-				gettimeofday(&samp->tv,NULL);
-				samp++;
-				hevt++;
-				ret -= sizeof(*hevt);
-			}
-		} else {
-			return -1;
-		}
-	} else if( strcmp(tseventtype,"MK712") == 0) { /* Hitachi Webpad events */
-		mevt = alloca(sizeof(*mevt) * nr);
-		ret = read(ts->fd, mevt, sizeof(*mevt) * nr);
-		if(ret > 0) {
-			int nr = ret / sizeof(*mevt);
-			while(ret >= sizeof(*mevt)) {
-				samp->x = (short)mevt->x;
-				samp->y = (short)mevt->y;
-				if(mevt->header==0)
-					samp->pressure=1;
-				else
-					samp->pressure=0;
-#ifdef DEBUG
-        fprintf(stderr,"RAW---------------------------> %d %d %d\n",samp->x,samp->y,samp->pressure);
-#endif /*DEBUG*/
-				gettimeofday(&samp->tv,NULL);
-				samp++;
-				mevt++;
-				ret -= sizeof(*mevt);
-			}
-		} else {
-			return -1;
-		}
-
-	} else if( strcmp(tseventtype,"ARCTIC2") == 0) { /* IBM Arctic II events */
-		aevt = alloca(sizeof(*aevt) * nr);
-		ret = read(ts->fd, aevt, sizeof(*aevt) * nr);
-		if(ret > 0) {
-			int nr = ret / sizeof(*aevt);
-			while(ret >= sizeof(*aevt)) {
-				samp->x = (short)aevt->x;
-				samp->y = (short)aevt->y;
-				samp->pressure = aevt->pressure;
-#ifdef DEBUG
-        fprintf(stderr,"RAW---------------------------> %d %d %d\n",samp->x,samp->y,samp->pressure);
-#endif /*DEBUG*/
-				gettimeofday(&samp->tv,NULL);
-				samp++;
-				aevt++;
-				ret -= sizeof(*aevt);
-			}
+	while ((total < nr) && pen_down) {
+//		fprintf(stdout, "total: %d, nr: %d\n", total, nr);
+#ifdef USE_INPUT_API
+		ret = get_input_event(ts, samp);
+#else
+		if (strcmp(tseventtype, "H3600") == 0) {
+			/* iPAQ style h3600 touchscreen events */
+			ret = get_h3600_event(ts, samp);
+		} else if (strcmp(tseventtype, "MK712") == 0) {
+			/* Hitachi Webpad events */
+			ret = get_mk712_event(ts, samp);
+		} else if (strcmp(tseventtype, "ARCTIC2") == 0) {
+			/* IBM Arctic II events */
+			ret = get_arctic2_event(ts, samp);
+		} else if (strcmp(tseventtype, "COLLIE") == 0) {
+			/* Sharp Zaurus SL-5000d/5500 events */
+			ret = get_collie_event(ts, samp);
+		} else if (strcmp(tseventtype,"CORGI") == 0) {
+			/* Sharp Zaurus SL-C700 events */
+			ret = get_corgi_event(ts, samp);
 		} else {
-			return -1;
+			/* Use normal UCB1x00 type events */
+			ret = get_ucb1x00_event(ts, samp);
 		}
+#endif
+		if (ret != 0) break;
 
-	} else if( strcmp(tseventtype,"COLLIE") == 0) { /* Sharp Zaurus SL-5000d/5500 events */
-		collie_evt = alloca(sizeof(*collie_evt) * nr);
-		ret = read(ts->fd, collie_evt, sizeof(*collie_evt) * nr);
-		if(ret > 0) {
-			int nr = ret / sizeof(*collie_evt);
-			while(ret >= sizeof(*collie_evt)) {
-				samp->x = collie_evt->x;
-				samp->y = collie_evt->y;
-				samp->pressure = collie_evt->pressure;
-#ifdef DEBUG
-        fprintf(stderr,"RAW---------------------------> %d %d %d\n",samp->x,samp->y,samp->pressure);
-#endif /*DEBUG*/
-				samp->tv.tv_usec = collie_evt->millisecs % 1000;
-				samp->tv.tv_sec = collie_evt->millisecs / 1000;
-				samp++;
-				collie_evt++;
-				ret -= sizeof(*collie_evt);
+		if (pthres == -1) {
+			char *pthresvar = getenv("TSLIB_PTHRES");
+			pthres = 100;
+			if (pthresvar != NULL) {
+				int p = strtol(pthresvar, (char **)NULL, 10);
+				if (p != -1) pthres = p;
 			}
-		} else {
-			return -1;
 		}
 
-	} else if( strcmp(tseventtype,"CORGI") == 0) { /* Sharp Zaurus SL-C700 events */
-		corgi_evt = alloca(sizeof(*corgi_evt) * nr);
-		ret = read(ts->fd, corgi_evt, sizeof(*corgi_evt) * nr);
-		if(ret > 0) {
-			int nr = ret / sizeof(*corgi_evt);
-			while(ret >= sizeof(*corgi_evt)) {
-				samp->x = corgi_evt->x;
-				samp->y = corgi_evt->y;
-				samp->pressure = corgi_evt->pressure;
-#ifdef DEBUG
-        fprintf(stderr,"RAW---------------------------> %d %d %d\n",samp->x,samp->y,samp->pressure);
-#endif /*DEBUG*/
-				samp->tv.tv_usec = corgi_evt->millisecs % 1000;
-				samp->tv.tv_sec = corgi_evt->millisecs / 1000;
-				samp++;
-				corgi_evt++;
-				ret -= sizeof(*corgi_evt);
-			}
+		if (samp->pressure < pthres) {
+			/* pen released, send events up */
+			pen_down = 0;
+			/* set x and y to previous values */
+			samp->x = x_save;
+			samp->y = y_save;
 		} else {
-			return -1;
+			pen_down = 1;
+			x_save = samp->x;
+			y_save = samp->y;
 		}
-
-	} else { /* Use normal UCB1x00 type events */
-		evt = alloca(sizeof(*evt) * nr);
-		ret = read(ts->fd, evt, sizeof(*evt) * nr);
-		if(ret > 0) {
-			int nr = ret / sizeof(*evt);
-			while(ret >= sizeof(*evt)) {
-				samp->x = evt->x;
-				samp->y = evt->y;
-				samp->pressure = evt->pressure;
 #ifdef DEBUG
-        fprintf(stderr,"RAW---------------------------> %d %d %d\n",samp->x,samp->y,samp->pressure);
+	        fprintf(stderr,"RAW---------------------------> %d %d %d\n",samp->x, samp->y, samp->pressure);
 #endif /*DEBUG*/
-				samp->tv.tv_usec = evt->stamp.tv_usec;
-				samp->tv.tv_sec = evt->stamp.tv_sec;
-				samp++;
-				evt++;
-				ret -= sizeof(*evt);
-			}
-		} else {
-			return -1;
-		}
+		samp++;
+		total++;
 	}
-	ret = nr;
-#endif /* USE_INPUT_API */
 
+	if (ret != 0) ret = -1;
+	if (total) ret = total;
 	return ret;
 }