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touchpad: switch delta handling to typesafe coordinates

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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 2015-03-11 09:58:11 +10:00
parent 614dc10fd1
commit 8101e43774
5 changed files with 73 additions and 65 deletions
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26
src/evdev-mt-touchpad-edge-scroll.c
View file

@ -311,8 +311,9 @@ tp_edge_scroll_post_events(struct tp_dispatch *tp, uint64_t time)
struct libinput_device *device = &tp->device->base;
struct tp_touch *t;
enum libinput_pointer_axis axis;
double dx, dy, *delta;
double *delta;
double initial_dx, initial_dy, *initial_delta;
struct normalized_coords normalized;
if (tp->scroll.method != LIBINPUT_CONFIG_SCROLL_EDGE)
return 0;
@ -335,20 +336,21 @@ tp_edge_scroll_post_events(struct tp_dispatch *tp, uint64_t time)
continue;
case EDGE_RIGHT:
axis = LIBINPUT_POINTER_AXIS_SCROLL_VERTICAL;
delta = &dy;
delta = &normalized.y;
initial_delta = &initial_dy;
break;
case EDGE_BOTTOM:
axis = LIBINPUT_POINTER_AXIS_SCROLL_HORIZONTAL;
delta = &dx;
delta = &normalized.x;
initial_delta = &initial_dx;
break;
default: /* EDGE_RIGHT | EDGE_BOTTOM */
continue; /* Don't know direction yet, skip */
}
tp_get_delta(t, &dx, &dy);
tp_filter_motion(tp, &dx, &dy, NULL, NULL, time);
normalized = tp_get_delta(t);
tp_filter_motion(tp, &normalized.x, &normalized.y,
NULL, NULL, time);
switch (t->scroll.edge_state) {
case EDGE_SCROLL_TOUCH_STATE_NONE:
@ -361,14 +363,12 @@ tp_edge_scroll_post_events(struct tp_dispatch *tp, uint64_t time)
initial_dx = t->point.x - t->scroll.initial.x;
initial_dy = t->point.y - t->scroll.initial.y;
tp_normalize_delta(tp,
&initial_dx,
&initial_dy);
initial_dx,
initial_dy,
&normalized);
if (fabs(*initial_delta) < DEFAULT_SCROLL_THRESHOLD) {
dx = 0.0;
dy = 0.0;
} else {
dx = initial_dx;
dy = initial_dy;
normalized.x = 0.0;
normalized.y = 0.0;
}
break;
case EDGE_SCROLL_TOUCH_STATE_EDGE:
@ -381,7 +381,7 @@ tp_edge_scroll_post_events(struct tp_dispatch *tp, uint64_t time)
pointer_notify_axis(device, time,
AS_MASK(axis),
LIBINPUT_POINTER_AXIS_SOURCE_FINGER,
dx, dy,
normalized.x, normalized.y,
0, 0);
t->scroll.direction = axis;

60
src/evdev-mt-touchpad-gestures.c
View file

@ -31,45 +31,45 @@
#define DEFAULT_GESTURE_SWITCH_TIMEOUT 100 /* ms */
static void
tp_get_touches_delta(struct tp_dispatch *tp, double *dx, double *dy, bool average)
static struct normalized_coords
tp_get_touches_delta(struct tp_dispatch *tp, bool average)
{
struct tp_touch *t;
unsigned int i, nchanged = 0;
double tmpx, tmpy;
*dx = 0.0;
*dy = 0.0;
struct normalized_coords normalized;
struct normalized_coords delta = {0.0, 0.0};
for (i = 0; i < tp->real_touches; i++) {
t = &tp->touches[i];
if (tp_touch_active(tp, t) && t->dirty) {
nchanged++;
tp_get_delta(t, &tmpx, &tmpy);
normalized = tp_get_delta(t);
*dx += tmpx;
*dy += tmpy;
delta.x += normalized.x;
delta.y += normalized.y;
}
}
if (!average || nchanged == 0)
return;
return delta;
*dx /= nchanged;
*dy /= nchanged;
delta.x /= nchanged;
delta.y /= nchanged;
return delta;
}
static inline void
tp_get_combined_touches_delta(struct tp_dispatch *tp, double *dx, double *dy)
static inline struct normalized_coords
tp_get_combined_touches_delta(struct tp_dispatch *tp)
{
tp_get_touches_delta(tp, dx, dy, false);
return tp_get_touches_delta(tp, false);
}
static inline void
tp_get_average_touches_delta(struct tp_dispatch *tp, double *dx, double *dy)
static inline struct normalized_coords
tp_get_average_touches_delta(struct tp_dispatch *tp)
{
tp_get_touches_delta(tp, dx, dy, true);
return tp_get_touches_delta(tp, true);
}
static void
@ -89,39 +89,41 @@ tp_gesture_start(struct tp_dispatch *tp, uint64_t time)
static void
tp_gesture_post_pointer_motion(struct tp_dispatch *tp, uint64_t time)
{
double dx = 0.0, dy = 0.0;
double dx_unaccel, dy_unaccel;
struct normalized_coords delta;
/* When a clickpad is clicked, combine motion of all active touches */
if (tp->buttons.is_clickpad && tp->buttons.state)
tp_get_combined_touches_delta(tp, &dx, &dy);
delta = tp_get_combined_touches_delta(tp);
else
tp_get_average_touches_delta(tp, &dx, &dy);
delta = tp_get_average_touches_delta(tp);
tp_filter_motion(tp, &dx, &dy, &dx_unaccel, &dy_unaccel, time);
tp_filter_motion(tp, &delta.x, &delta.y, &dx_unaccel, &dy_unaccel, time);
if (dx != 0.0 || dy != 0.0 || dx_unaccel != 0.0 || dy_unaccel != 0.0) {
if (delta.x != 0.0 || delta.y != 0.0 ||
dx_unaccel != 0.0 || dy_unaccel != 0.0) {
pointer_notify_motion(&tp->device->base, time,
dx, dy, dx_unaccel, dy_unaccel);
delta.x, delta.y,
dx_unaccel, dy_unaccel);
}
}
static void
tp_gesture_post_twofinger_scroll(struct tp_dispatch *tp, uint64_t time)
{
double dx = 0, dy =0;
struct normalized_coords delta;
tp_get_average_touches_delta(tp, &dx, &dy);
tp_filter_motion(tp, &dx, &dy, NULL, NULL, time);
delta = tp_get_average_touches_delta(tp);
tp_filter_motion(tp, &delta.x, &delta.y, NULL, NULL, time);
if (dx == 0.0 && dy == 0.0)
if (delta.x == 0.0 && delta.y == 0.0)
return;
tp_gesture_start(tp, time);
evdev_post_scroll(tp->device,
time,
LIBINPUT_POINTER_AXIS_SOURCE_FINGER,
dx, dy);
delta.x, delta.y);
}
void

6
src/evdev-mt-touchpad-tap.c
View file

@ -532,12 +532,14 @@ tp_tap_exceeds_motion_threshold(struct tp_dispatch *tp,
{
int threshold = DEFAULT_TAP_MOVE_THRESHOLD;
double dx, dy;
struct normalized_coords normalized;
dx = abs(t->tap.initial.x - t->point.x);
dy = abs(t->tap.initial.y - t->point.y);
tp_normalize_delta(tp, &dx, &dy);
tp_normalize_delta(tp, dx, dy, &normalized);
return dx * dx + dy * dy > threshold * threshold;
return normalized.x * normalized.x + normalized.y * normalized.y
> threshold * threshold;
}
static bool

34
src/evdev-mt-touchpad.c
View file

@ -250,24 +250,26 @@ tp_estimate_delta(int x0, int x1, int x2, int x3)
return (x0 + x1 - x2 - x3) / 4.0;
}
void
tp_get_delta(struct tp_touch *t, double *dx, double *dy)
struct normalized_coords
tp_get_delta(struct tp_touch *t)
{
if (t->history.count < TOUCHPAD_MIN_SAMPLES) {
*dx = 0;
*dy = 0;
return;
}
double dx, dy; /* in device coords */
struct normalized_coords normalized = { 0.0, 0.0 };
*dx = tp_estimate_delta(tp_motion_history_offset(t, 0)->x,
tp_motion_history_offset(t, 1)->x,
tp_motion_history_offset(t, 2)->x,
tp_motion_history_offset(t, 3)->x);
*dy = tp_estimate_delta(tp_motion_history_offset(t, 0)->y,
tp_motion_history_offset(t, 1)->y,
tp_motion_history_offset(t, 2)->y,
tp_motion_history_offset(t, 3)->y);
tp_normalize_delta(t->tp, dx, dy);
if (t->history.count < TOUCHPAD_MIN_SAMPLES)
return normalized;
dx = tp_estimate_delta(tp_motion_history_offset(t, 0)->x,
tp_motion_history_offset(t, 1)->x,
tp_motion_history_offset(t, 2)->x,
tp_motion_history_offset(t, 3)->x);
dy = tp_estimate_delta(tp_motion_history_offset(t, 0)->y,
tp_motion_history_offset(t, 1)->y,
tp_motion_history_offset(t, 2)->y,
tp_motion_history_offset(t, 3)->y);
tp_normalize_delta(t->tp, dx, dy, &normalized);
return normalized;
}
static void

12
src/evdev-mt-touchpad.h
View file

@ -277,14 +277,16 @@ struct tp_dispatch {
for (unsigned int _i = 0; _i < (_tp)->ntouches && (_t = &(_tp)->touches[_i]); _i++)
static inline void
tp_normalize_delta(struct tp_dispatch *tp, double *dx, double *dy)
tp_normalize_delta(struct tp_dispatch *tp,
double dx, double dy,
struct normalized_coords *normalized)
{
*dx = *dx * tp->accel.x_scale_coeff;
*dy = *dy * tp->accel.y_scale_coeff;
normalized->x = dx * tp->accel.x_scale_coeff;
normalized->y = dy * tp->accel.y_scale_coeff;
}
void
tp_get_delta(struct tp_touch *t, double *dx, double *dy);
struct normalized_coords
tp_get_delta(struct tp_touch *t);
void
tp_filter_motion(struct tp_dispatch *tp,