From: "Jasper St. Pierre" <[email protected]>
If we do this, then we could get a nonsensically giant or even
overflowing delta timestamp, which is bad.
---
Xi/xibarriers.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/Xi/xibarriers.c b/Xi/xibarriers.c
index a225cbc..9cc8364 100644
--- a/Xi/xibarriers.c
+++ b/Xi/xibarriers.c
@@ -466,7 +466,11 @@ input_constrain_cursor(DeviceIntPtr dev, ScreenPtr screen,
ev.event_id = pbd->barrier_event_id;
ev.barrierid = c->id;
- ev.dt = ms - pbd->last_timestamp;
+ if (pbd->last_timestamp > 0)
+ ev.dt = ms - pbd->last_timestamp;
+ else
+ ev.dt = 0;
+
ev.window = c->window;
pbd->last_timestamp = ms;
@@ -502,7 +506,7 @@ input_constrain_cursor(DeviceIntPtr dev, ScreenPtr screen,
ev.dt = ms - pbd->last_timestamp;
ev.window = c->window;
- pbd->last_timestamp = ms;
+ pbd->last_timestamp = 0;
/* root x/y is filled in later */
--
1.8.1.4
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