diff options
Diffstat (limited to 'src/wcmCommon.c')
| -rw-r--r-- | src/wcmCommon.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/src/wcmCommon.c b/src/wcmCommon.c index 97f7765..209565c 100644 --- a/src/wcmCommon.c +++ b/src/wcmCommon.c @@ -1071,12 +1071,17 @@ normalizePressure(const WacomDevicePtr priv, const WacomDeviceState *ds) WacomCommonPtr common = priv->common; double pressure; int p = ds->pressure; + int range_left; /* normalize pressure to 0..FILTER_PRESSURE_RES */ - pressure = xf86ScaleAxis(p - priv->minPressure, - FILTER_PRESSURE_RES, 0, - common->wcmMaxZ - priv->minPressure, - 0); + range_left = common->wcmMaxZ - priv->minPressure; + if (range_left >= 1) + pressure = xf86ScaleAxis(p - priv->minPressure, + FILTER_PRESSURE_RES, 0, + range_left, + 0); + else + pressure = FILTER_PRESSURE_RES; return (int)pressure; } |