diff options
Diffstat (limited to 'src/synaptics.c')
| -rw-r--r-- | src/synaptics.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/src/synaptics.c b/src/synaptics.c index f0a8269..2de05d4 100644 --- a/src/synaptics.c +++ b/src/synaptics.c @@ -2453,10 +2453,11 @@ clickpad_guess_clickfingers(SynapticsPrivate * priv, struct SynapticsHwState *hw) { int nfingers = 0; - char close_point[SYNAPTICS_MAX_TOUCHES] = { 0 }; /* 1 for each point close - to another one */ + uint32_t close_point = 0; /* 1 bit for each point close to another one */ int i, j; + BUG_RETURN_VAL(hw->num_mt_mask > sizeof(close_point) * 8, 0); + for (i = 0; i < hw->num_mt_mask - 1; i++) { ValuatorMask *f1; @@ -2488,14 +2489,16 @@ clickpad_guess_clickfingers(SynapticsPrivate * priv, * size. Good luck. */ if (abs(x1 - x2) < (priv->maxx - priv->minx) * .3 && abs(y1 - y2) < (priv->maxy - priv->miny) * .3) { - close_point[j] = 1; - close_point[i] = 1; + close_point |= (1 << j); + close_point |= (1 << i); } } } - for (i = 0; i < SYNAPTICS_MAX_TOUCHES; i++) - nfingers += close_point[i]; + while (close_point > 0) { + nfingers += close_point & 0x1; + close_point >>= 1; + } return nfingers; } |