From 8331c4858987bce53afac9c06ab45808fd751dbd Mon Sep 17 00:00:00 2001
From: Henrik Rydberg <rydberg@euromail.se>
Date: Fri, 7 Nov 2008 00:57:33 +0100
Subject: Works nicely - state output seems reasonable

Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
---
 src/multitouch.c |  2 +-
 src/state.c      | 83 ++++++++++++++++++++++++++++++++++----------------------
 src/state.h      |  5 +++-
 3 files changed, 55 insertions(+), 35 deletions(-)

(limited to 'src')

diff --git a/src/multitouch.c b/src/multitouch.c
index 21f3e1e..c18f3d3 100644
--- a/src/multitouch.c
+++ b/src/multitouch.c
@@ -81,7 +81,7 @@ static void read_input(LocalDevicePtr local)
 	struct MTouch *mt = local->private;
 	if (local->fd >= 0) {
 		while (read_synchronized_event(mt, local->fd)) {
-			modify_state(&mt->ns, &mt->hw);
+			modify_state(&mt->ns, &mt->hw, &mt->caps);
 			output_state(&mt->ns);
 			mt->os = mt->ns;
 		}
diff --git a/src/state.c b/src/state.c
index fc3580d..eff9c3e 100644
--- a/src/state.c
+++ b/src/state.c
@@ -10,9 +10,9 @@ void init_state(struct State *s)
 
 /******************************************************/
 
-inline int fincomp(const struct FingerState* a,const struct FingerState* b)
+static int fincmp(const void* a,const void* b)
 {
-	return a->id - b->id;
+	return ((struct FingerState *)a)->id - ((struct FingerState *)b)->id;
 }
 
 inline float dist2(const struct FingerData* a,const struct FingerData* b)
@@ -23,10 +23,33 @@ inline float dist2(const struct FingerData* a,const struct FingerData* b)
 	return dx * dx + dy * dy;
 }
 
-void modify_state(struct State *s, const struct HWData* hw)
+static void set_finger(struct FingerState* fs,
+		       const struct FingerData* hw, int id,
+		       const struct Capabilities* caps)
+{
+	fs->hw = *hw;
+	fs->id = id;
+	if (!caps->has_touch_minor)
+		fs->hw.touch_minor = hw->touch_major;
+	if (!caps->has_width_minor)
+		fs->hw.width_minor = hw->width_major;
+}
+
+inline bool good_finger(const struct FingerState* fs)
+{
+	return fs->hw.touch_major > 0 && fs->hw.width_major > 0 &&
+		fs->hw.touch_minor > 0 && fs->hw.width_minor > 0;
+}
+
+/******************************************************/
+
+void modify_state(struct State *s,
+		  const struct HWData* hw,
+		  const struct Capabilities* caps)
 {
 	float A[DIM2_FINGER], *row;
 	int id[DIM_FINGER], index[DIM_FINGER], i, j;
+	struct FingerState *fs = s->finger;
 
 	for (j = 0; j < s->nfinger; j++) {
 		id[j] = s->finger[j].id;
@@ -37,29 +60,20 @@ void modify_state(struct State *s, const struct HWData* hw)
 
 	match_fingers(index, A, hw->nfinger, s->nfinger);
 
-	s->nfinger = 0;
-
-	/* update matched fingers */
-	for (i = 0; i < hw->nfinger; i++) {
-		if ((j = index[i]) >= 0) {
-			s->finger[s->nfinger].id = id[j];
-			s->finger[s->nfinger].hw = hw->finger[i];
-			s->nfinger++;
-		}
-	}
-
-	/* create new fingers */
+	/* update matched fingers and create new ones */
 	for (i = 0; i < hw->nfinger; i++) {
-		if (index[i] < 0) {
-			s->finger[s->nfinger].id = ++s->lastid;
-			s->finger[s->nfinger].hw = hw->finger[i];
-			s->nfinger++;
-		}
+		j = index[i];
+		if (j >= 0)
+			set_finger(fs, hw->finger + i, id[j], caps);
+		else
+			set_finger(fs, hw->finger + i, ++s->lastid, caps);
+		if (good_finger(fs))
+			fs++;
 	}
+	s->nfinger = fs - s->finger;
 
 	/* sort fingers in touching order */
-	qsort(s->finger, s->nfinger, sizeof(struct FingerState),
-	      (int (*)(const void*,const void*))fincomp);
+	qsort(s->finger, s->nfinger, sizeof(struct FingerState), fincmp);
 
 	/* copy buttons */
 	for (i = 0; i < DIM_BUTTON; i++)
@@ -84,18 +98,21 @@ const struct FingerState *find_finger(const struct State *s, int id)
 void output_state(const struct State *s)
 {
 	int i;
-	printf("buttons: %d%d%d\n", s->button[0], s->button[1], s->button[2]);
-	printf("fingers: %d\n", s->nfinger);
+	xf86Msg(X_INFO, "buttons: %d%d%d\n",
+		s->button[0], s->button[1], s->button[2]);
+	xf86Msg(X_INFO, "fingers: %d\n",
+		s->nfinger);
 	for (i = 0; i < s->nfinger; i++) {
-		printf("  %+02d %+05d:%+05d +%05d:%+05d %+05d %+05d:%+05d\n",
-		       s->finger[i].id,
-		       s->finger[i].hw.touch_major,
-		       s->finger[i].hw.touch_minor,
-		       s->finger[i].hw.width_major,
-		       s->finger[i].hw.width_minor,
-		       s->finger[i].hw.orientation,
-		       s->finger[i].hw.position_x,
-		       s->finger[i].hw.position_y);
+		xf86Msg(X_INFO,
+			"  %+02d %+05d:%+05d +%05d:%+05d %+06d %+05d:%+05d\n",
+			s->finger[i].id,
+			s->finger[i].hw.touch_major,
+			s->finger[i].hw.touch_minor,
+			s->finger[i].hw.width_major,
+			s->finger[i].hw.width_minor,
+			s->finger[i].hw.orientation,
+			s->finger[i].hw.position_x,
+			s->finger[i].hw.position_y);
 	}
 }
 
diff --git a/src/state.h b/src/state.h
index 8b41920..7bf4438 100644
--- a/src/state.h
+++ b/src/state.h
@@ -1,6 +1,7 @@
 #ifndef MTEVENT_H
 #define MTEVENT_H
 
+#include "capabilities.h"
 #include "hwdata.h"
 
 ////////////////////////////////////////////////////////
@@ -21,7 +22,9 @@ struct State {
 ////////////////////////////////////////////////////////
 
 void init_state(struct State *s);
-void modify_state(struct State *s, const struct HWData* hw);
+void modify_state(struct State *s,
+		  const struct HWData* hw,
+		  const struct Capabilities* caps);
 void output_state(const struct State *s);
 
 const struct FingerState *find_finger(const struct State *s, int id);
-- 
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