Introduce MTFinger structure

Switch from the FingerData structure to the MTFinger structure, making
room for more computed finger details in MTState.

Signed-off-by: Henrik Rydberg <rydberg@euromail.se>

3 files changed, 27 insertions, 11 deletions

diff --git a/src/gestures.c b/src/gestures.c
index a0ef5d4..9426226 100644
--- a/src/gestures.c
+++ b/src/gestures.c
@@ -31,18 +31,18 @@
 static const int FINGER_ATTACK_MS = 70;
 static const int FINGER_DECAY_MS = 120;
 
-inline int dxval(const struct FingerState *a, const struct FingerState *b)
+inline int dxval(const struct MTFinger *a, const struct MTFinger *b)
 {
         return a->hw.position_x - b->hw.position_x;
 }
-inline int dyval(const struct FingerState *a, const struct FingerState *b)
+inline int dyval(const struct MTFinger *a, const struct MTFinger *b)
 {
         return a->hw.position_y - b->hw.position_y;
 }
 
 static void extract_finger_configuration(struct Gestures *gs, struct MTouch* mt)
 {
-        const struct FingerState *f = mt->state.finger;
+        const struct MTFinger *f = mt->state.finger;
         int i, same = mt->state.nfinger == mt->prev_state.nfinger;
         for (i = 0; i < mt->state.nfinger; i++)
                 same = same && find_finger(&mt->prev_state, f[i].id);
@@ -51,7 +51,7 @@ static void extract_finger_configuration(struct Gestures *gs, struct MTouch* mt)
 
 static void extract_pointers(struct Gestures *gs, struct MTouch* mt)
 {
-        const struct FingerState *f = mt->state.finger;
+        const struct MTFinger *f = mt->state.finger;
         int i;
 
         if (mt->state.nfinger < 2) {
@@ -86,7 +86,7 @@ static void extract_pointers(struct Gestures *gs, struct MTouch* mt)
 
 static void extract_movement(struct Gestures *gs, struct MTouch* mt)
 {
-        const struct FingerState *prev, *f = mt->state.finger;
+        const struct MTFinger *prev, *f = mt->state.finger;
         int i, x = 0, y = 0;
         int dx, dy, xcut, ycut, xmax = 0, ymax = 0;
 
diff --git a/src/mtstate.c b/src/mtstate.c
index a8541dc..c3bcc78 100644
--- a/src/mtstate.c
+++ b/src/mtstate.c
@@ -39,6 +39,14 @@ static int touching_finger(const struct FingerData *hw,
         return 1;
 }
 
+static int set_finger(struct MTFinger *f,
+                      const struct FingerState *fs,
+                      const struct Capabilities *caps)
+{
+        f->hw = fs->hw;
+        f->id = fs->id;
+}
+
 void extract_mtstate(struct MTState *s,
                      const struct HWState *hs,
                      const struct Capabilities *caps)
@@ -46,15 +54,18 @@ void extract_mtstate(struct MTState *s,
         int i;
 
         s->nfinger = 0;
-        for (i = 0; i < hs->nfinger; i++)
-                if (touching_finger(&hs->finger[i].hw, caps))
-                        s->finger[s->nfinger++] = hs->finger[i];
+        for (i = 0; i < hs->nfinger; i++) {
+                if (!touching_finger(&hs->finger[i].hw, caps))
+                        continue;
+                set_finger(&s->finger[s->nfinger], &hs->finger[i], caps);
+                s->nfinger++;
+        }
 
         s->button = hs->button;
         s->evtime = hs->evtime;
 }
 
-const struct FingerState *find_finger(const struct MTState *s, int id)
+const struct MTFinger *find_finger(const struct MTState *s, int id)
 {
         int i;
 
diff --git a/src/mtstate.h b/src/mtstate.h
index f8790dd..fa297cd 100644
--- a/src/mtstate.h
+++ b/src/mtstate.h
@@ -24,8 +24,13 @@
 
 #include "hwstate.h"
 
+struct MTFinger {
+        struct FingerData hw;
+        int id;
+};
+
 struct MTState {
-        struct FingerState finger[DIM_FINGER];
+        struct MTFinger finger[DIM_FINGER];
         int nfinger;
         unsigned button;
         mstime_t evtime;
@@ -37,7 +42,7 @@ void extract_mtstate(struct MTState *s,
                      const struct Capabilities *caps);
 void output_mtstate(const struct MTState *s);
 
-const struct FingerState *find_finger(const struct MTState *s, int id);
+const struct MTFinger *find_finger(const struct MTState *s, int id);
 
 #endif