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touchpad: Create fake touches for BTN_TOOL_FOO on multi-touch pads too

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Multi-touch pads may track less touches then they can report fingers being
present through BTN_TOOL_FOO. So create fake touches for fingers reported
by BTN_TOOL_FOO on multi-touch pads too (when necessary).

This fixes e.g. 3 finger tap not working on the T440s.

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 11:06:38 +02:00 • committed by Peter Hutterer
parent 9720c16ecc
commit 64f431c303
2 changed files with 40 additions and 38 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

74
src/evdev-mt-touchpad.c
View file

@ -247,7 +247,7 @@ tp_process_fake_touch(struct tp_dispatch *tp,
struct tp_touch *t;
unsigned int fake_touches;
unsigned int nfake_touches;
unsigned int i;
unsigned int i, start;
unsigned int shift;
if (e->code != BTN_TOUCH &&
@ -268,16 +268,18 @@ tp_process_fake_touch(struct tp_dispatch *tp,
fake_touches >>= 1;
}
for (i = 0; i < tp->ntouches; i++) {
/* For single touch tps we use BTN_TOUCH for begin / end of touch 0 */
start = tp->has_mt ? tp->real_touches : 0;
for (i = start; i < tp->ntouches; i++) {
t = tp_get_touch(tp, i);
if (i < nfake_touches) {
if (i < nfake_touches)
tp_begin_touch(tp, t, time);
t->fake =true;
} else
else
tp_end_touch(tp, t, time);
}
assert(tp->nfingers_down == nfake_touches);
/* On mt the actual touch info may arrive after BTN_TOOL_FOO */
assert(tp->has_mt || tp->nfingers_down == nfake_touches);
}
static void
@ -295,8 +297,7 @@ tp_process_key(struct tp_dispatch *tp,
case BTN_TOOL_DOUBLETAP:
case BTN_TOOL_TRIPLETAP:
case BTN_TOOL_QUADTAP:
if (!tp->has_mt)
tp_process_fake_touch(tp, e, time);
tp_process_fake_touch(tp, e, time);
break;
}
}
@ -401,9 +402,11 @@ tp_process_state(struct tp_dispatch *tp, uint64_t time)
{
struct tp_touch *t;
struct tp_touch *first = tp_get_touch(tp, 0);
unsigned int i;
tp_for_each_touch(tp, t) {
if (!tp->has_mt && t != first && first->fake) {
for (i = 0; i < tp->ntouches; i++) {
t = tp_get_touch(tp, i);
if (i >= tp->real_touches && t->state != TOUCH_NONE) {
t->x = first->x;
t->y = first->y;
if (!t->dirty)
@ -443,10 +446,9 @@ tp_post_process_state(struct tp_dispatch *tp, uint64_t time)
if (!t->dirty)
continue;
if (t->state == TOUCH_END) {
if (t->state == TOUCH_END)
t->state = TOUCH_NONE;
t->fake = false;
} else if (t->state == TOUCH_BEGIN)
else if (t->state == TOUCH_BEGIN)
t->state = TOUCH_UPDATE;
t->dirty = false;
@ -642,41 +644,41 @@ static int
tp_init_slots(struct tp_dispatch *tp,
struct evdev_device *device)
{
size_t i;
const struct input_absinfo *absinfo;
struct map {
unsigned int code;
int ntouches;
} max_touches[] = {
{ BTN_TOOL_QUINTTAP, 5 },
{ BTN_TOOL_QUADTAP, 4 },
{ BTN_TOOL_TRIPLETAP, 3 },
{ BTN_TOOL_DOUBLETAP, 2 },
};
struct map *m;
unsigned int i, n_btn_tool_touches = 1;
absinfo = libevdev_get_abs_info(device->evdev, ABS_MT_SLOT);
if (absinfo) {
tp->ntouches = absinfo->maximum + 1;
tp->real_touches = absinfo->maximum + 1;
tp->slot = absinfo->value;
tp->has_mt = true;
} else {
struct map {
unsigned int code;
int ntouches;
} max_touches[] = {
{ BTN_TOOL_QUINTTAP, 5 },
{ BTN_TOOL_QUADTAP, 4 },
{ BTN_TOOL_TRIPLETAP, 3 },
{ BTN_TOOL_DOUBLETAP, 2 },
};
struct map *m;
tp->real_touches = 1;
tp->slot = 0;
tp->has_mt = false;
tp->ntouches = 1;
}
ARRAY_FOR_EACH(max_touches, m) {
if (libevdev_has_event_code(device->evdev,
EV_KEY,
m->code)) {
tp->ntouches = m->ntouches;
break;
}
ARRAY_FOR_EACH(max_touches, m) {
if (libevdev_has_event_code(device->evdev,
EV_KEY,
m->code)) {
n_btn_tool_touches = m->ntouches;
break;
}
}
tp->touches = calloc(tp->ntouches,
sizeof(struct tp_touch));
tp->ntouches = max(tp->real_touches, n_btn_tool_touches);
tp->touches = calloc(tp->ntouches, sizeof(struct tp_touch));
if (!tp->touches)
return -1;

4
src/evdev-mt-touchpad.h
View file

@ -103,7 +103,6 @@ struct tp_touch {
struct tp_dispatch *tp;
enum touch_state state;
bool dirty;
bool fake; /* a fake touch */
bool is_pointer; /* the pointer-controlling touch */
int32_t x;
int32_t y;
@ -156,7 +155,8 @@ struct tp_dispatch {
unsigned int slot; /* current slot */
bool has_mt;
unsigned int ntouches; /* number of slots */
unsigned int real_touches; /* number of slots */
unsigned int ntouches; /* no slots inc. fakes */
struct tp_touch *touches; /* len == ntouches */
unsigned int fake_touches; /* fake touch mask */