Add convenience methods for distance to capability center point

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

1 files changed, 14 insertions, 0 deletions

diff --git a/src/mtstate.h b/src/mtstate.h
index fa297cd..a8feaa4 100644
--- a/src/mtstate.h
+++ b/src/mtstate.h
@@ -44,5 +44,19 @@ void output_mtstate(const struct MTState *s);
 
 const struct MTFinger *find_finger(const struct MTState *s, int id);
 
+
+static inline int center_dist2(const struct MTFinger *a,
+                               const struct Capabilities *caps)
+{
+        return dist2(a->hw.position_x - get_cap_xmid(caps),
+                     a->hw.position_y - get_cap_ymid(caps));
+}
+
+static inline int center_maxdist2(const struct Capabilities *caps)
+{
+        return dist2(caps->abs_position_x.maximum - get_cap_xmid(caps),
+                     caps->abs_position_y.maximum - get_cap_ymid(caps));
+}
+
 #endif