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
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
|
/***************************************************************************
*
* 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 "memory.h"
/* click area definition */
#define CLICK_AREA(c) ((c->has_ibt ? 0.20 : 0.00) * get_cap_ysize(c))
/* fraction of max movement threshold */
#define DELTA_CUT(x) (0.5 * (x))
/* timer for cursor stability on finger touch/release */
static const int FINGER_ATTACK_MS = 40;
static const int FINGER_DECAY_MS = 120;
static const int FINGER_CORNER_MS = 150;
static inline int dxval(const struct FingerState *a,
const struct FingerState *b)
{
return a->position_x - b->position_x;
}
static inline int dyval(const struct FingerState *a,
const struct FingerState *b)
{
return a->position_y - b->position_y;
}
void init_memory(struct Memory *mem)
{
memset(mem, 0, sizeof(struct Memory));
}
/**
* update_configuration
*
* Update the same, fingers, added, and thumb memory variables.
*
* Precondition: none
*
* Postcondition: same, fingers, added, thumb are set
*
*/
static void update_configuration(struct Memory *m,
const struct MTState *prev_state,
const struct MTState *state)
{
const struct FingerState *f = state->finger;
bitmask_t fingers = BITONES(state->nfinger);
int i;
m->added = 0;
foreach_bit(i, fingers)
if (!find_finger(prev_state, f[i].tracking_id))
SETBIT(m->added, i);
m->same = m->fingers == fingers && m->added == 0;
m->fingers = fingers;
if (!m->same)
m->thumb = 0;
m->thumb |= state->thumb;
}
/**
* update_pointers
*
* Update the pointing and ybar memory variables.
*
* Precondition: fingers, added, thumb are set
*
* Postcondition: pointing, ybar are set
*
*/
static void update_pointers(struct Memory *m,
const struct MTState *state,
const struct Capabilities *caps)
{
const struct FingerState *f = state->finger;
int yclick = caps->abs[BIT_POSITION_Y].maximum - CLICK_AREA(caps);
int i;
if (state->nfinger < 2) {
m->pointing = m->fingers;
m->ybar = caps->abs[BIT_POSITION_Y].maximum;
return;
}
if (m->same) {
foreach_bit(i, m->fingers & ~m->pointing) {
if (f[i].position_y <= m->ybar) {
m->pointing = m->fingers;
return;
}
}
return;
}
m->pointing = 0;
m->ybar = yclick;
foreach_bit(i, m->fingers) {
if (f[i].position_y > yclick)
continue;
if (!m->pointing || f[i].position_y > m->ybar)
m->ybar = f[i].position_y;
SETBIT(m->pointing, i);
}
}
/**
* update_movement
*
* Update the pending, moving, mvhold, mvforget, dx and dy memory variables.
*
* When moving is nonzero, gestures can be extracted from the dx and dy
* variables. These variables should be cleared after use.
*
* Precondition: fingers, added, thumb, pointing are set
*
* Postcondition: pending, moving, mvhold, mvforget, dx, dy are set
*
*/
static void update_movement(struct Memory *m,
const struct MTState *prev_state,
const struct MTState *state,
const struct Capabilities *caps)
{
const struct FingerState *prev, *f = state->finger;
int i, xcut, ycut, xmax = 0, ymax = 0;
m->moving = 0;
m->pending = 0;
if (!m->same) {
mstime_t d2, d2max = center_maxdist2(caps);
mem_hold_movement(m, state->evtime + FINGER_ATTACK_MS);
if (!m->added)
mem_hold_movement(m, state->evtime + FINGER_DECAY_MS);
foreach_bit(i, m->added) {
d2 = center_dist2(&f[i], caps);
d2 *= FINGER_CORNER_MS - FINGER_ATTACK_MS;
d2 /= d2max;
m->mvhold += d2;
}
memset(m->dx, 0, sizeof(m->dx));
memset(m->dy, 0, sizeof(m->dy));
return;
}
if (state->evtime < m->mvforget)
return;
foreach_bit(i, m->pointing) {
int dx, dy;
prev = find_finger(prev_state, f[i].tracking_id);
dx = dxval(&f[i], prev);
dy = dyval(&f[i], prev);
m->dx[i] += dx;
m->dy[i] += dy;
xmax = maxval(xmax, abs(m->dx[i]));
ymax = maxval(ymax, abs(m->dy[i]));
}
xcut = DELTA_CUT(xmax);
ycut = DELTA_CUT(ymax);
foreach_bit(i, m->pointing)
if (abs(m->dx[i]) > xcut || abs(m->dy[i]) > ycut)
SETBIT(m->pending, i);
if (state->evtime < m->mvhold)
return;
m->moving = m->pending;
}
void refresh_memory(struct Memory *m,
const struct MTState *prev_state,
const struct MTState *state,
const struct Capabilities *caps)
{
update_configuration(m, prev_state, state);
update_pointers(m, state, caps);
update_movement(m, prev_state, state, caps);
}
void output_memory(const struct Memory *m)
{
int i;
xf86Msg(X_INFO, "btdata: %04x\n", m->btdata);
xf86Msg(X_INFO, "fingers: %04x\n", m->fingers);
xf86Msg(X_INFO, "added: %04x\n", m->added);
xf86Msg(X_INFO, "pointing: %04x\n", m->pointing);
xf86Msg(X_INFO, "pending: %04x\n", m->pending);
xf86Msg(X_INFO, "moving: %04x\n", m->moving);
xf86Msg(X_INFO, "ybar: %d\n", m->ybar);
}
|
