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touchpad: make tp_estimate_delta return fractions

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Force a cast of the input arguments to a double before the divide, rather
than after the divide.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
This commit is contained in:
Hans de Goede 2014-07-18 11:06:39 +02:00 • committed by Peter Hutterer
parent 64f431c303
commit aab902cc39
1 changed files with 1 additions and 1 deletions
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src/evdev-mt-touchpad.c
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@ -163,7 +163,7 @@ tp_end_touch(struct tp_dispatch *tp, struct tp_touch *t, uint64_t time)
static double
tp_estimate_delta(int x0, int x1, int x2, int x3)
{
return (x0 + x1 - x2 - x3) / 4;
return (x0 + x1 - x2 - x3) / 4.0;
}
void