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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 "mtstate.h"
#define TOUCH_WIDTH(hw) (0.05 * hw->width_major)
#define TOUCH_SCALE(caps) (0.05 * caps->abs[MTDEV_TOUCH_MAJOR].maximum)
#define THUMB_TOUCH(hw) (1.2 * hw->touch_minor)
#define THUMB_WIDTH_TOUCH(hw) (3 * hw->touch_major)
#define THUMB_WIDTH_WIDTH(hw) (1.2 * hw->width_minor)
#define THUMB_WIDTH_SIZE(hw, caps) (0.15 * get_cap_xsize(caps))
void init_mtstate(struct MTState *s)
{
memset(s, 0, sizeof(struct MTState));
}
static int touching_finger(const struct FingerState *hw,
const struct Capabilities *caps)
{
if (caps->has_abs[MTDEV_TOUCH_MAJOR] && caps->has_abs[MTDEV_WIDTH_MAJOR])
return hw->touch_major > TOUCH_WIDTH(hw);
if (caps->has_abs[MTDEV_TOUCH_MAJOR])
return hw->touch_major > TOUCH_SCALE(caps);
return 1;
}
/*
* Thumb detection:
*
* The thumb is large and oval, even when not pressed hard against the
* surface. The width_major parameter is therefore bounded from below
* by all three values touch_major, width_minor, and trackpad size.
*
*/
static int is_thumb(const struct FingerState *hw,
const struct Capabilities *caps)
{
if (!caps->has_abs[MTDEV_TOUCH_MAJOR] ||
!caps->has_abs[MTDEV_TOUCH_MINOR] ||
!caps->has_abs[MTDEV_WIDTH_MAJOR] ||
!caps->has_abs[MTDEV_WIDTH_MINOR])
return 0;
return hw->touch_major > THUMB_TOUCH(hw) &&
hw->width_major > THUMB_WIDTH_TOUCH(hw) &&
hw->width_major > THUMB_WIDTH_WIDTH(hw) &&
hw->width_major > THUMB_WIDTH_SIZE(hw, caps);
}
void extract_mtstate(struct MTState *s,
const struct HWState *hs,
const struct Capabilities *caps)
{
int i;
s->nfinger = 0;
foreach_bit(i, hs->used) {
if (!touching_finger(&hs->data[i], caps))
continue;
s->finger[s->nfinger] = hs->data[i];
MODBIT(s->thumb, s->nfinger, is_thumb(&hs->data[i], caps));
s->nfinger++;
}
s->button = hs->button;
s->evtime = hs->evtime;
}
const struct FingerState *find_finger(const struct MTState *s, int id)
{
int i;
for (i = 0; i < s->nfinger; i++)
if (s->finger[i].tracking_id == id)
return s->finger + i;
return NULL;
}
void output_mtstate(const struct MTState *s)
{
int i;
xf86Msg(X_INFO, "buttons: %d%d%d\n",
GETBIT(s->button, MT_BUTTON_LEFT),
GETBIT(s->button, MT_BUTTON_MIDDLE),
GETBIT(s->button, MT_BUTTON_RIGHT));
xf86Msg(X_INFO, "fingers: %d\n",
s->nfinger);
xf86Msg(X_INFO, "evtime: %lld\n",
s->evtime);
for (i = 0; i < s->nfinger; i++) {
xf86Msg(X_INFO,
" %+02d %+05d:%+05d +%05d:%+05d "
"%+06d %+06d %+05d:%+05d\n",
s->finger[i].tracking_id,
s->finger[i].touch_major,
s->finger[i].touch_minor,
s->finger[i].width_major,
s->finger[i].width_minor,
s->finger[i].orientation,
s->finger[i].pressure,
s->finger[i].position_x,
s->finger[i].position_y);
}
}
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