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https://gitlab.freedesktop.org/libinput/libinput.git
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Merge branch 'wip/touchpad-pointer-accel-v7'
This commit is contained in:
Peter Hutterer
commit
fbd284ec14
3 changed files with 110 additions and 156 deletions
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@ -77,23 +77,33 @@
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<text><tspan font-family="Arial" > 5</tspan></text>
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<text><tspan font-family="Arial" > 0.001</tspan></text>
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<text><tspan font-family="Arial" > 10</tspan></text>
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<text><tspan font-family="Arial" > 15</tspan></text>
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@ -107,139 +117,48 @@
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<text><tspan font-family="Arial" >delta (units)</tspan></text>
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<text><tspan font-family="Arial" >speed in units/us</tspan></text>
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<g id="gnuplot_plot_1" ><title>-1</title>
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<g id="gnuplot_plot_1" ><title>linear (mouse)</title>
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<text><tspan font-family="Arial" >-1</tspan></text>
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<text><tspan font-family="Arial" >linear (mouse)</tspan></text>
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<g id="gnuplot_plot_2" ><title>-0.75</title>
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<g id="gnuplot_plot_2" ><title>const accel 1</title>
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<text><tspan font-family="Arial" >-0.75</tspan></text>
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||||
<text><tspan font-family="Arial" >const accel 1</tspan></text>
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<g id="gnuplot_plot_3" ><title>-0.5</title>
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||||
<g id="gnuplot_plot_3" ><title>const accel 2</title>
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<text><tspan font-family="Arial" >-0.5</tspan></text>
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||||
<text><tspan font-family="Arial" >const accel 2</tspan></text>
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<g id="gnuplot_plot_4" ><title>-0.25</title>
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||||
<g id="gnuplot_plot_4" ><title>const accel 3</title>
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<text><tspan font-family="Arial" >-0.25</tspan></text>
|
||||
<text><tspan font-family="Arial" >const accel 3</tspan></text>
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<g id="gnuplot_plot_5" ><title>0</title>
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L419.1,49.2 L424.3,49.2 L429.5,49.2 L434.7,49.2 L439.9,49.2 L445.1,49.2 L450.3,49.2 L455.5,49.2
|
||||
L460.7,49.2 L465.9,49.2 L471.1,49.2 L476.3,49.2 L481.5,49.2 L486.7,49.2 L491.8,49.2 L497.0,49.2
|
||||
L502.2,49.2 L507.4,49.2 L512.6,49.2 L517.8,49.2 L523.0,49.2 L528.2,49.2 L533.4,49.2 L538.6,49.2
|
||||
L543.8,49.2 L549.0,49.2 L554.2,49.2 L559.4,49.2 L564.6,49.2 L569.8,49.2 L575.0,49.2 '/></g>
|
||||
</g>
|
||||
<g id="gnuplot_plot_6" ><title>0.5</title>
|
||||
<g fill="none" color="black" stroke="currentColor" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
|
||||
<g transform="translate(507.9,128.6)" stroke="none" fill="black" font-family="Arial" font-size="12.00" text-anchor="end">
|
||||
<text><tspan font-family="Arial" >0.5</tspan></text>
|
||||
</g>
|
||||
</g>
|
||||
<g fill="none" color="black" stroke="currentColor" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
|
||||
<path stroke='rgb( 0, 114, 178)' d='M516.2,124.7 L558.4,124.7 M55.3,422.4 L60.5,399.0 L65.7,375.7 L70.9,352.3 L76.1,328.9 L81.3,305.6
|
||||
L86.5,282.2 L91.7,258.8 L96.9,235.5 L102.1,212.1 L107.3,188.7 L112.5,165.3 L117.7,142.0 L122.9,118.6
|
||||
L128.1,95.2 L133.3,71.9 L138.5,48.5 L143.6,25.1 L145.5,16.7 '/></g>
|
||||
</g>
|
||||
<g id="gnuplot_plot_7" ><title>1</title>
|
||||
<g fill="none" color="black" stroke="currentColor" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
|
||||
<g transform="translate(507.9,146.6)" stroke="none" fill="black" font-family="Arial" font-size="12.00" text-anchor="end">
|
||||
<text><tspan font-family="Arial" >1</tspan></text>
|
||||
</g>
|
||||
</g>
|
||||
<g fill="none" color="black" stroke="currentColor" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
|
||||
<path stroke='rgb(229, 30, 16)' d='M516.2,142.7 L558.4,142.7 M55.3,422.4 L60.5,392.5 L65.7,362.7 L70.9,332.8 L76.1,303.0 L81.3,273.1
|
||||
L86.5,243.2 L91.7,213.4 L96.9,183.5 L102.1,153.7 L107.3,123.8 L112.5,93.9 L117.7,64.1 L122.9,34.2
|
||||
L125.9,16.7 '/></g>
|
||||
</g>
|
||||
<g fill="none" color="#FFFFFF" stroke="rgb(229, 30, 16)" stroke-width="2.00" stroke-linecap="butt" stroke-linejoin="miter">
|
||||
<g fill="none" color="#FFFFFF" stroke="rgb(230, 159, 0)" stroke-width="2.00" stroke-linecap="butt" stroke-linejoin="miter">
|
||||
</g>
|
||||
<g fill="none" color="black" stroke="currentColor" stroke-width="2.00" stroke-linecap="butt" stroke-linejoin="miter">
|
||||
</g>
|
||||
|
|
|
|||
|
Before Width: | Height: | Size: 19 KiB After Width: | Height: | Size: 11 KiB |
|
|
@ -40,13 +40,7 @@
|
|||
* 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 0.37 /* unitless factor */
|
||||
|
||||
/* Touchpad acceleration */
|
||||
#define TOUCHPAD_DEFAULT_THRESHOLD 254 /* mm/s */
|
||||
#define TOUCHPAD_THRESHOLD_RANGE 184 /* mm/s */
|
||||
#define TOUCHPAD_ACCELERATION 9.0 /* unitless factor */
|
||||
#define TOUCHPAD_INCLINE 0.011 /* unitless factor */
|
||||
#define TP_MAGIC_SLOWDOWN 0.2968 /* unitless factor */
|
||||
|
||||
struct touchpad_accelerator {
|
||||
struct motion_filter base;
|
||||
|
|
@ -60,9 +54,10 @@ struct touchpad_accelerator {
|
|||
|
||||
double threshold; /* units/us */
|
||||
double accel; /* unitless factor */
|
||||
double incline; /* incline of the function */
|
||||
|
||||
int dpi;
|
||||
|
||||
double speed_factor; /* factor based on speed setting */
|
||||
};
|
||||
|
||||
/**
|
||||
|
|
@ -147,6 +142,30 @@ accelerator_filter_post_normalized(struct motion_filter *filter,
|
|||
return normalize_for_dpi(&accelerated, accel->dpi);
|
||||
}
|
||||
|
||||
/* Maps the [-1, 1] speed setting into a constant acceleration
|
||||
* range. This isn't a linear scale, we keep 0 as the 'optimized'
|
||||
* mid-point and scale down to 0 for setting -1 and up to 5 for
|
||||
* setting 1. On the premise that if you want a faster cursor, it
|
||||
* doesn't matter as much whether you have 0.56789 or 0.56790,
|
||||
* but for lower settings it does because you may lose movements.
|
||||
* *shrug*.
|
||||
*
|
||||
* Magic numbers calculated by MyCurveFit.com, data points were
|
||||
* 0.0 0.0
|
||||
* 0.1 0.1 (because we need 4 points)
|
||||
* 1 1
|
||||
* 2 5
|
||||
*
|
||||
* This curve fits nicely into the range necessary.
|
||||
*/
|
||||
static inline double
|
||||
speed_factor(double s)
|
||||
{
|
||||
s += 1; /* map to [0, 2] */
|
||||
return 435837.2 + (0.04762636 - 435837.2)/(1 + pow(s/240.4549,
|
||||
2.377168));
|
||||
}
|
||||
|
||||
static bool
|
||||
touchpad_accelerator_set_speed(struct motion_filter *filter,
|
||||
double speed_adjustment)
|
||||
|
|
@ -156,15 +175,8 @@ touchpad_accelerator_set_speed(struct motion_filter *filter,
|
|||
|
||||
assert(speed_adjustment >= -1.0 && speed_adjustment <= 1.0);
|
||||
|
||||
/* Note: the numbers below are nothing but trial-and-error magic,
|
||||
don't read more into them other than "they mostly worked ok" */
|
||||
|
||||
/* adjust when accel kicks in */
|
||||
accel_filter->threshold = TOUCHPAD_DEFAULT_THRESHOLD -
|
||||
TOUCHPAD_THRESHOLD_RANGE * speed_adjustment;
|
||||
accel_filter->accel = TOUCHPAD_ACCELERATION;
|
||||
accel_filter->incline = TOUCHPAD_INCLINE;
|
||||
filter->speed_adjustment = speed_adjustment;
|
||||
accel_filter->speed_factor = speed_factor(speed_adjustment);
|
||||
|
||||
return true;
|
||||
}
|
||||
|
|
@ -214,9 +226,8 @@ touchpad_accel_profile_linear(struct motion_filter *filter,
|
|||
{
|
||||
struct touchpad_accelerator *accel_filter =
|
||||
(struct touchpad_accelerator *)filter;
|
||||
const double max_accel = accel_filter->accel; /* unitless factor */
|
||||
const double threshold = accel_filter->threshold; /* units/us */
|
||||
const double incline = accel_filter->incline;
|
||||
const double baseline = 0.9;
|
||||
double factor; /* unitless */
|
||||
|
||||
/* Convert to mm/s because that's something one can understand */
|
||||
|
|
@ -229,20 +240,21 @@ touchpad_accel_profile_linear(struct motion_filter *filter,
|
|||
|
||||
accel
|
||||
factor
|
||||
^
|
||||
| /
|
||||
| _____/
|
||||
^ ______
|
||||
| )
|
||||
| _____)
|
||||
| /
|
||||
|/
|
||||
+-------------> speed in
|
||||
|
||||
The two inclines are linear functions in the form
|
||||
Except the second incline is a curve, but well, asciiart.
|
||||
|
||||
The first incline is a linear function in the form
|
||||
y = ax + b
|
||||
where y is speed_out
|
||||
x is speed_in
|
||||
a is the incline of acceleration
|
||||
b is minimum acceleration factor
|
||||
|
||||
for speeds up to the lower threshold, we decelerate, down to 30%
|
||||
of input speed.
|
||||
hence 1 = a * 7 + 0.3
|
||||
|
|
@ -250,37 +262,47 @@ touchpad_accel_profile_linear(struct motion_filter *filter,
|
|||
deceleration function is thus:
|
||||
y = 0.1x + 0.3
|
||||
|
||||
The first plateau is the baseline.
|
||||
|
||||
The second incline is a curve up, based on magic numbers
|
||||
obtained by trial-and-error.
|
||||
|
||||
Above the second incline we have another plateau because
|
||||
by then you're moving so fast that extra acceleration doesn't
|
||||
help.
|
||||
|
||||
Note:
|
||||
* The minimum threshold is a result of trial-and-error and
|
||||
has no other intrinsic meaning.
|
||||
has no other special meaning.
|
||||
* 0.3 is chosen simply because it is above the Nyquist frequency
|
||||
for subpixel motion within a pixel.
|
||||
*/
|
||||
|
||||
if (speed_in < 7.0) {
|
||||
factor = 0.1 * speed_in + 0.3;
|
||||
factor = min(baseline, 0.1 * speed_in + 0.3);
|
||||
/* up to the threshold, we keep factor 1, i.e. 1:1 movement */
|
||||
} else if (speed_in < threshold) {
|
||||
factor = 1;
|
||||
factor = baseline;
|
||||
} else {
|
||||
/* Acceleration function above the threshold:
|
||||
y = ax' + b
|
||||
where T is threshold
|
||||
x is speed_in
|
||||
x' is speed
|
||||
and
|
||||
y(T) == 1
|
||||
hence 1 = ax' + 1
|
||||
=> x' := (x - T)
|
||||
|
||||
/* Acceleration function above the threshold is a curve up
|
||||
to four times the threshold, because why not.
|
||||
|
||||
Don't assume anything about the specific numbers though, this was
|
||||
all just trial and error by tweaking numbers here and there, then
|
||||
the formula was optimized doing basic maths.
|
||||
|
||||
You could replace this with some other random formula that gives
|
||||
the same numbers and it would be just as correct.
|
||||
|
||||
*/
|
||||
factor = incline * (speed_in - threshold) + 1;
|
||||
const double upper_threshold = threshold * 4.0;
|
||||
speed_in = min(speed_in, upper_threshold);
|
||||
|
||||
factor = 0.0025 * (speed_in/threshold) * (speed_in - threshold) + baseline;
|
||||
}
|
||||
|
||||
/* Cap at the maximum acceleration factor */
|
||||
factor = min(max_accel, factor);
|
||||
|
||||
/* Scale everything depending on the acceleration set */
|
||||
factor *= 1 + 0.5 * filter->speed_adjustment;
|
||||
|
||||
factor *= accel_filter->speed_factor;
|
||||
return factor * TP_MAGIC_SLOWDOWN;
|
||||
}
|
||||
|
||||
|
|
@ -306,9 +328,7 @@ create_pointer_accelerator_filter_touchpad(int dpi,
|
|||
|
||||
trackers_init(&filter->trackers);
|
||||
|
||||
filter->threshold = TOUCHPAD_DEFAULT_THRESHOLD;
|
||||
filter->accel = TOUCHPAD_ACCELERATION;
|
||||
filter->incline = TOUCHPAD_INCLINE;
|
||||
filter->threshold = 130;
|
||||
filter->dpi = dpi;
|
||||
|
||||
filter->base.interface = &accelerator_interface_touchpad;
|
||||
|
|
|
|||
|
|
@ -342,6 +342,21 @@ draw_background(struct window *w, cairo_t *cr)
|
|||
cairo_rel_line_to(cr, 20, 0);
|
||||
}
|
||||
cairo_stroke(cr);
|
||||
|
||||
/* round targets */
|
||||
for (int i = 0; i <= 3; i++) {
|
||||
x1 = w->width * i/4.0;
|
||||
x2 = w->width * i/4.0;
|
||||
|
||||
y1 = w->height * 1.0/4.0;
|
||||
y2 = w->height * 3.0/4.0;
|
||||
|
||||
cairo_arc(cr, x1, y1, 10, 0, 2 * M_PI);
|
||||
cairo_stroke(cr);
|
||||
cairo_arc(cr, x2, y2, 10, 0, 2 * M_PI);
|
||||
cairo_stroke(cr);
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
static gboolean
|
||||
|
|
|
|||
Loading…
Add table
Reference in a new issue