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/***************************************************************************
*
* Multitouch X driver
* Copyright (C) 2008 Henrik Rydberg <rydberg@euromail.se>
*
* 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 2 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, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
**************************************************************************/
#include "mtouch.h"
static const int use_grab = 1;
int configure_mtouch(struct MTouch *mt, int fd)
{
int rc = read_capabilities(&mt->caps, fd);
if (rc < 0)
return rc;
output_capabilities(&mt->caps);
return 0;
}
int open_mtouch(struct MTouch *mt, int fd)
{
mtdev_init(&mt->dev, &mt->caps);
init_iobuf(&mt->buf);
init_hwstate(&mt->hs, &mt->caps);
init_mtstate(&mt->prev_state);
init_mtstate(&mt->state);
init_memory(&mt->mem);
if (use_grab) {
int rc;
SYSCALL(rc = ioctl(fd, EVIOCGRAB, (pointer)1));
return rc;
}
return 0;
}
int get_mtouch(struct MTouch *mt, int fd, struct input_event* ev, int ev_max)
{
const struct input_event *kev;
int count = 0;
while (count < ev_max) {
while (mtdev_empty(&mt->dev)) {
kev = get_iobuf_event(&mt->buf, fd);
if (!kev)
return count;
mtdev_put(&mt->dev, &mt->caps, kev);
}
mtdev_get(&mt->dev, &ev[count++]);
}
return count;
}
int close_mtouch(struct MTouch *mt, int fd)
{
if (use_grab) {
int rc;
SYSCALL(rc = ioctl(fd, EVIOCGRAB, (pointer)0));
}
mtdev_destroy(&mt->dev);
return 0;
}
int read_packet(struct MTouch *mt, int fd)
{
struct input_event ev;
int ret;
while ((ret = get_mtouch(mt, fd, &ev, 1)) > 0)
if (hwstate_read(&mt->hs, &mt->caps, &ev))
break;
if (ret <= 0)
return ret;
extract_mtstate(&mt->state, &mt->hs, &mt->caps);
#if 0
output_mtstate(&mt->state);
#endif
refresh_memory(&mt->mem, &mt->prev_state, &mt->state, &mt->caps);
#if 0
output_memory(&mt->mem);
#endif
return 1;
}
int has_delayed_gestures(struct MTouch *mt, int fd)
{
return mt->mem.wait &&
mtdev_empty(&mt->dev) &&
poll_iobuf(&mt->buf, fd, mt->mem.wait) == 0;
}
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