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tablet: add a comment explaining why we adjust the pressure offset downwards

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Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
This commit is contained in:
Peter Hutterer 2019-08-06 13:09:40 +10:00
parent c5865f3ef0
commit a71d091e59
1 changed files with 5 additions and 0 deletions
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5
src/evdev-tablet.c
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@ -1271,6 +1271,11 @@ detect_pressure_offset(struct tablet_dispatch *tablet,
offset = pressure->value - pressure->minimum; offset = pressure->value - pressure->minimum;
/* If we have an event that falls below the current offset, adjust
* the offset downwards. A fast contact can start with a
* higher-than-needed pressure offset and then we'd be tied into a
* high pressure offset for the rest of the session.
*/
if (tool->has_pressure_offset) { if (tool->has_pressure_offset) {
if (offset < tool->pressure_offset) if (offset < tool->pressure_offset)
tool->pressure_offset = offset; tool->pressure_offset = offset;