The physical size of the touch pad is reported in 1000 cm. The
actual fomula to get points/mm would be:
MaxTouch/PhyTouch/100
Signed-off-by: Ping Cheng <[email protected]>
---
src/wcmUSB.c | 9 +++++----
1 files changed, 5 insertions(+), 4 deletions(-)
diff --git a/src/wcmUSB.c b/src/wcmUSB.c
index c53ff06..600ffda 100644
--- a/src/wcmUSB.c
+++ b/src/wcmUSB.c
@@ -495,10 +495,11 @@ int usbWcmGetRanges(InputInfoPtr pInfo)
if (is_touch && common->wcmTouchResolX && common->wcmMaxTouchX)
{
- common->wcmTouchResolX = (int)(((double)common->wcmTouchResolX)
- / ((double)common->wcmMaxTouchX) + 0.5);
- common->wcmTouchResolY = (int)(((double)common->wcmTouchResolY)
- / ((double)common->wcmMaxTouchY) + 0.5);
+ /* physical size is reported in 1000 cm */
+ common->wcmTouchResolX = (int)(((double)common->wcmMaxTouchX)
+ / ((double)common->wcmTouchResolX/100.0) + 0.5);
+ common->wcmTouchResolY = (int)(((double)common->wcmMaxTouchY)
+ / ((double)common->wcmTouchResolY/100.0) + 0.5);
if (!common->wcmTouchResolX || !common->wcmTouchResolY)
{
--
1.7.2.3
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