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filter: move the TP_MAGIC_SLOWDOWN to a single definition

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Requires splitting out the X230 one so we don't accidentally break things if
we ever change this.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Peter Hutterer 2015-08-18 09:11:48 +10:00
parent dac38a0828
commit e4fd60ce5e
1 changed files with 9 additions and 9 deletions
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18
src/filter.c
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@ -36,6 +36,12 @@
#include "libinput-util.h"
#include "filter-private.h"
/* Once normalized, touchpads see the same acceleration as mice. that is
* technically correct but subjectively wrong, we expect a touchpad to be a
* lot slower than a mouse. Apply a magic factor to slow down all movements
*/
#define TP_MAGIC_SLOWDOWN 0.4 /* unitless factor */
/* Convert speed/velocity from units/us to units/ms */
static inline double
v_us2ms(double units_per_us)
@ -581,12 +587,6 @@ touchpad_accel_profile_linear(struct motion_filter *filter,
double speed_in, /* units/us */
uint64_t time)
{
/* Once normalized, touchpads see the same
acceleration as mice. that is technically correct but
subjectively wrong, we expect a touchpad to be a lot
slower than a mouse. Apply a magic factor here and proceed
as normal. */
const double TP_MAGIC_SLOWDOWN = 0.4; /* unitless */
double factor; /* unitless */
speed_in *= TP_MAGIC_SLOWDOWN;
@ -603,7 +603,7 @@ touchpad_lenovo_x230_accel_profile(struct motion_filter *filter,
uint64_t time)
{
/* Keep the magic factor from touchpad_accel_profile_linear. */
const double TP_MAGIC_SLOWDOWN = 0.4; /* unitless */
const double X230_MAGIC_SLOWDOWN = 0.4; /* unitless */
/* Those touchpads presents an actual lower resolution that what is
* advertised. We see some jumps from the cursor due to the big steps
@ -629,14 +629,14 @@ touchpad_lenovo_x230_accel_profile(struct motion_filter *filter,
* pointer_accel_profile_linear(), look at the git history of that
* function for an explaination of what the min/max/etc. does.
*/
speed_in *= TP_MAGIC_SLOWDOWN / TP_MAGIC_LOW_RES_FACTOR;
speed_in *= X230_MAGIC_SLOWDOWN / TP_MAGIC_LOW_RES_FACTOR;
f1 = min(1, v_us2ms(speed_in) * 5);
f2 = 1 + (v_us2ms(speed_in) - v_us2ms(threshold)) * incline;
factor = min(max_accel, f2 > 1 ? f2 : f1);
return factor * TP_MAGIC_SLOWDOWN / TP_MAGIC_LOW_RES_FACTOR;
return factor * X230_MAGIC_SLOWDOWN / TP_MAGIC_LOW_RES_FACTOR;
}
double