diff options
| author | Simon Thum <simon.thum@gmx.de> | 2011-02-21 11:55:17 +1000 |
|---|---|---|
| committer | Peter Hutterer <peter.hutterer@who-t.net> | 2011-02-21 11:55:32 +1000 |
| commit | 7771bc91c989d1ac6f6147f2b26e5d7e70555856 (patch) | |
| tree | a49cf25576c15dce0388a84964204087a022a9ff | |
| parent | f2f19be03d62b45e51e7fa55b24ed14fec3ba4d2 (diff) | |
add a few comments to ComputeDeltas()
Signed-off-by: Simon Thum <simon.thum@gmx.de>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Conflicts:
src/synaptics.c
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
| -rw-r--r-- | src/synaptics.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/src/synaptics.c b/src/synaptics.c index 365951a..0a7ceac 100644 --- a/src/synaptics.c +++ b/src/synaptics.c @@ -1810,6 +1810,7 @@ get_delta(SynapticsPrivate *priv, const struct SynapticsHwState *hw, int x_edge_speed = 0; int y_edge_speed = 0; + /* HIST is full enough: priv->count_packet_finger > 3 */ *dx = estimate_delta(hw->x, HIST(0).x, HIST(1).x, HIST(2).x); *dy = estimate_delta(hw->y, HIST(0).y, HIST(1).y, HIST(2).y); @@ -1826,6 +1827,9 @@ get_delta(SynapticsPrivate *priv, const struct SynapticsHwState *hw, *dy = integral; } +/** + * Compute relative motion ('deltas') including edge motion xor trackstick. + */ static int ComputeDeltas(SynapticsPrivate *priv, const struct SynapticsHwState *hw, edge_type edge, int *dxP, int *dyP, Bool inside_area) @@ -1864,10 +1868,11 @@ ComputeDeltas(SynapticsPrivate *priv, const struct SynapticsHwState *hw, goto out; } - /* FIXME: Wtf?? what's with 13? */ + /* to create fluid edge motion, call back 'soon' + * even in the absence of new hardware events */ delay = MIN(delay, 13); - if (priv->count_packet_finger <= 3) /* min. 3 packets */ + if (priv->count_packet_finger <= 3) /* min. 3 packets, see get_delta() */ goto skip; /* skip the lot */ if (priv->moving_state == MS_TRACKSTICK) |