1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
|
/***************************************************************************
*
* 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 "state.h"
#include <stdlib.h>
#include <limits.h>
const double FTW = 0.05;
const double FTS = 0.05;
void init_state(struct State *s)
{
memset(s, 0, sizeof(struct State));
}
static int fincmp(const void *a, const void *b)
{
return ((struct FingerState *)a)->id - ((struct FingerState *)b)->id;
}
inline float dist2(const struct FingerData *a, const struct FingerData *b)
{
float dx = a->position_x - b->position_x;
float dy = a->position_y - b->position_y;
return dx * dx + dy * dy;
}
static void set_finger(struct FingerState *fs,
const struct FingerData *hw, int id,
const struct Capabilities *caps)
{
fs->hw = *hw;
fs->id = id;
if (!caps->has_touch_minor)
fs->hw.touch_minor = hw->touch_major;
if (!caps->has_width_minor)
fs->hw.width_minor = hw->width_major;
}
static int touching_finger(const struct FingerData *hw,
const struct Capabilities *caps)
{
if (caps->has_touch_major && caps->has_width_major)
return hw->width_major > 0 &&
hw->touch_major > FTW * hw->width_major;
if (caps->has_touch_major)
return hw->touch_major > FTS * caps->abs_touch_major.maximum;
return 1;
}
void modify_state(struct State *s,
const struct HWData *hw,
const struct Capabilities *caps)
{
float A[DIM2_FINGER], *row;
int sid[DIM_FINGER], hw2s[DIM_FINGER];
int id, sk, hwk;
/* setup distance matrix for finger id matching */
for (sk = 0; sk < s->nfinger; sk++) {
sid[sk] = s->finger[sk].id;
row = A + hw->nfinger * sk;
for (hwk = 0; hwk < hw->nfinger; hwk++)
row[hwk] = dist2(&hw->finger[hwk], &s->finger[sk].hw);
}
match_fingers(hw2s, A, hw->nfinger, s->nfinger);
/* update matched fingers and create new ones */
for (hwk = 0; hwk < hw->nfinger; hwk++) {
sk = hw2s[hwk];
id = sk >= 0 ? sid[sk] : 0;
if (!touching_finger(&hw->finger[hwk], caps))
id = 0;
else
while (!id)
id = ++s->lastid;
set_finger(&s->finger[hwk], &hw->finger[hwk], id, caps);
}
s->button = hw->button;
s->nfinger = hw->nfinger;
/* sort fingers in touching order */
qsort(s->finger, s->nfinger, sizeof(struct FingerState), fincmp);
}
const struct FingerState *find_finger(const struct State *s, int id)
{
int i;
if (!id)
return NULL;
for (i = 0; i < s->nfinger; i++)
if (s->finger[i].id == id)
return s->finger + i;
return NULL;
}
int count_fingers(const struct State *s)
{
int i, n = 0;
for (i = 0; i < s->nfinger; i++)
if (s->finger[i].id)
n++;
return n;
}
void output_state(const struct State *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);
for (i = 0; i < s->nfinger; i++) {
xf86Msg(X_INFO,
" %+02d %+05d:%+05d +%05d:%+05d %+06d %+05d:%+05d\n",
s->finger[i].id,
s->finger[i].hw.touch_major,
s->finger[i].hw.touch_minor,
s->finger[i].hw.width_major,
s->finger[i].hw.width_minor,
s->finger[i].hw.orientation,
s->finger[i].hw.position_x,
s->finger[i].hw.position_y);
}
}
|
