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/*****************************************************************************
*
* grail - Gesture Recognition And Instantiation Library
*
* Copyright (C) 2010 Canonical Ltd.
* Copyright (C) 2010 Henrik Rydberg <rydberg@bitmath.org>
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation, either version 3 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*
****************************************************************************/
#include <grail-touch.h>
#include <malloc.h>
#include <string.h>
#include <errno.h>
/* see mtdev-mapping.h */
#define MTDEV_TOUCH_MINOR 1
#define SET_PROP(name, value) \
if (t->name != value) { \
t->name = value; \
frame->nmodify++; \
}
static void finish_touch(struct touch_dev *dev, struct touch_frame *frame)
{
struct touch *t = &frame->touch[dev->slot];
if (t->touch_major && !t->touch_minor ||
!dev->mtdev.caps.has_abs[MTDEV_TOUCH_MINOR])
SET_PROP(touch_minor, t->touch_major);
if (dev->state > 0) {
t->active = 1;
grail_mask_set(frame->touches, dev->slot);
frame->ncreate++;
}
if (dev->state < 0) {
t->active = 0;
grail_mask_clear(frame->touches, dev->slot);
frame->ndestroy++;
}
dev->state = 0;
}
static void finish_legacy(struct touch_dev *dev, struct touch_frame *frame)
{
static int trkid;
int i;
for (i = 0; i < frame->nactive; i++) {
struct touch *t = &frame->touch[i];
t->active = 1;
if (t->id < 0) {
t->id = trkid++ & 0xffff;
frame->ncreate++;
}
if (i > 0) {
SET_PROP(x, frame->touch[0].x);
SET_PROP(y, frame->touch[0].y);
SET_PROP(pressure, frame->touch[0].pressure);
}
grail_mask_set(frame->touches, i);
}
for (i = frame->nactive; i < DIM_TOUCH; i++) {
struct touch *t = &frame->touch[i];
t->active = 0;
if (t->id >= 0) {
t->id = -1;
frame->ndestroy++;
}
grail_mask_clear(frame->touches, i);
}
}
static void finish_packet(struct touch_dev *dev,
const struct input_event *syn)
{
static const touch_time_t ms = 1000;
struct touch_frame *frame = &dev->frame;
int i, nslot = 0;
if (dev->mtdev.caps.has_mtdata)
finish_touch(dev, frame);
else
finish_legacy(dev, frame);
grail_mask_foreach(i, frame->touches, DIM_TOUCH_BYTES)
frame->active[nslot++] = &frame->touch[i];
frame->nactive = nslot;
frame->time = syn->time.tv_usec / ms + syn->time.tv_sec * ms;
if (dev->sync)
dev->sync(dev, syn);
frame->ncreate = 0;
frame->nmodify = 0;
frame->ndestroy = 0;
}
static int handle_abs_event(struct touch_dev *dev,
const struct input_event *ev)
{
struct touch_frame *frame = &dev->frame;
struct touch *t = &frame->touch[dev->slot];
switch (ev->code) {
case ABS_X:
if (dev->mtdev.caps.has_mtdata)
return 0;
SET_PROP(x, ev->value);
return 0;
case ABS_Y:
if (dev->mtdev.caps.has_mtdata)
return 0;
SET_PROP(y, ev->value);
return 0;
case ABS_PRESSURE:
if (dev->mtdev.caps.has_mtdata)
return 0;
SET_PROP(pressure, ev->value);
return 0;
case ABS_MT_SLOT:
if (ev->value >= 0 && ev->value < DIM_TOUCH) {
if (dev->slot != ev->value)
finish_touch(dev, frame);
dev->slot = ev->value;
t = &frame->touch[dev->slot];
}
return 1;
case ABS_MT_POSITION_X:
SET_PROP(x, ev->value);
return 1;
case ABS_MT_POSITION_Y:
SET_PROP(y, ev->value);
return 1;
case ABS_MT_TOUCH_MAJOR:
SET_PROP(touch_major, ev->value);
return 1;
case ABS_MT_TOUCH_MINOR:
SET_PROP(touch_minor, ev->value);
return 1;
case ABS_MT_WIDTH_MAJOR:
SET_PROP(width_major, ev->value);
return 1;
case ABS_MT_WIDTH_MINOR:
SET_PROP(width_minor, ev->value);
return 1;
case ABS_MT_ORIENTATION:
SET_PROP(orientation, ev->value);
return 1;
case ABS_MT_PRESSURE:
SET_PROP(pressure, ev->value);
return 1;
case ABS_MT_TOOL_TYPE:
SET_PROP(tool_type, ev->value);
return 1;
case ABS_MT_TRACKING_ID:
if (t->id != ev->value) {
if (t->id != MT_ID_NULL) {
dev->state = -1;
finish_touch(dev, frame);
}
if (ev->value != MT_ID_NULL)
dev->state = 1;
t->id = ev->value;
}
return 1;
default:
return 0;
}
}
static int handle_key_event(struct touch_dev *dev,
const struct input_event *ev)
{
struct touch_frame *frame = &dev->frame;
if (dev->mtdev.caps.has_mtdata)
return 0;
switch (ev->code) {
case BTN_TOUCH:
if (ev->value && !frame->nactive)
frame->nactive = 1;
else if (!ev->value && frame->nactive)
frame->nactive = 0;
return 0;
case BTN_TOOL_FINGER:
if (ev->value)
frame->nactive = 1;
return 0;
case BTN_TOOL_DOUBLETAP:
if (ev->value)
frame->nactive = 2;
return 0;
case BTN_TOOL_TRIPLETAP:
if (ev->value)
frame->nactive = 3;
return 0;
case BTN_TOOL_QUADTAP:
if (ev->value)
frame->nactive = 4;
return 0;
default:
return 0;
}
}
int touch_dev_open(struct touch_dev *dev, int fd)
{
struct touch_frame *frame = &dev->frame;
int ret, i;
memset(dev, 0, sizeof(*dev));
for (i = 0; i < DIM_TOUCH; i++) {
struct touch *t = &frame->touch[i];
t->slot = i;
t->id = MT_ID_NULL;
}
ret = mtdev_open(&dev->mtdev, fd);
if (!ret && !touch_caps_is_supported(dev, fd))
ret = -ENODEV;
if (ret)
goto error;
touch_caps_init(dev);
return 0;
error:
return ret;
}
int touch_dev_idle(struct touch_dev *dev, int fd, int ms)
{
return mtdev_idle(&dev->mtdev, fd, ms);
}
int touch_dev_pull(struct touch_dev *dev, int fd)
{
struct input_event ev;
int ret, count = 0, consumed;
while ((ret = mtdev_get(&dev->mtdev, fd, &ev, 1)) > 0) {
consumed = 0;
if (ev.type == EV_SYN) {
if (ev.code == SYN_REPORT)
finish_packet(dev, &ev);
consumed++;
} else if (ev.type == EV_ABS) {
consumed += handle_abs_event(dev, &ev);
} else if (ev.type == EV_KEY) {
consumed += handle_key_event(dev, &ev);
}
if (!consumed && dev->event)
dev->event(dev, &ev);
count++;
}
return count > 0 ? count : ret;
}
void touch_dev_close(struct touch_dev *dev, int fd)
{
mtdev_close(&dev->mtdev);
memset(dev, 0, sizeof(*dev));
}
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