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-rw-r--r--src/touch-caps.c117
1 files changed, 0 insertions, 117 deletions
diff --git a/src/touch-caps.c b/src/touch-caps.c
deleted file mode 100644
index f99b0d7..0000000
--- a/src/touch-caps.c
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@@ -1,117 +0,0 @@
1/*****************************************************************************
2 *
3 * grail - Gesture Recognition And Instantiation Library
4 *
5 * Copyright (C) 2010 Canonical Ltd.
6 * Copyright (C) 2010 Henrik Rydberg <rydberg@bitmath.org>
7 *
8 * This program is free software: you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation, either version 3 of the License, or (at your
11 * option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License along
19 * with this program. If not, see <http://www.gnu.org/licenses/>.
20 *
21 ****************************************************************************/
22
23#include <grail-touch.h>
24#include <errno.h>
25#include <math.h>
26
27/* see mtdev-mapping.h */
28#define MTDEV_POSITION_X 5
29#define MTDEV_POSITION_Y 6
30#define MTDEV_ORIENTATION 4
31#define MTDEV_PRESSURE 10
32
33#define SYSCALL(call) while (((call) == -1) && (errno == EINTR))
34
35static const int bits_per_long = 8 * sizeof(long);
36
37static inline int nlongs(int nbit)
38{
39 return (nbit + bits_per_long - 1) / bits_per_long;
40}
41
42static inline int getbit(const unsigned long *map, int key)
43{
44 return (map[key / bits_per_long] >> (key % bits_per_long)) & 0x01;
45}
46
47int touch_caps_is_supported(struct touch_dev *dev, int fd)
48{
49 unsigned long keybits[nlongs(KEY_MAX)];
50 unsigned long absbits[nlongs(ABS_MAX)];
51 unsigned long relbits[nlongs(REL_CNT)];
52 int rc;
53
54 SYSCALL(rc = ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(keybits)), keybits));
55 if (rc < 0)
56 return 0;
57 SYSCALL(rc = ioctl(fd, EVIOCGBIT(EV_ABS, sizeof(absbits)), absbits));
58 if (rc < 0)
59 return 0;
60 SYSCALL(rc = ioctl(fd, EVIOCGBIT(EV_REL, sizeof(relbits)), relbits));
61 if (rc < 0)
62 return 0;
63
64 /* only support pure absolute devices at this time */
65 if (getbit(relbits, REL_X) || getbit(relbits, REL_Y))
66 return 0;
67
68 if (dev->mtdev.caps.has_mtdata)
69 return 1;
70
71 return getbit(absbits, ABS_X) &&
72 getbit(absbits, ABS_Y) &&
73 getbit(keybits, BTN_TOUCH) &&
74 getbit(keybits, BTN_TOOL_DOUBLETAP);
75}
76
77void touch_caps_init(struct touch_dev *dev)
78{
79 const struct mtdev_caps *mt = &dev->mtdev.caps;
80 struct touch_caps *caps = &dev->caps;
81 caps->min_x = mt->abs[MTDEV_POSITION_X].minimum;
82 caps->max_x = mt->abs[MTDEV_POSITION_X].maximum;
83 caps->min_y = mt->abs[MTDEV_POSITION_Y].minimum;
84 caps->max_y = mt->abs[MTDEV_POSITION_Y].maximum;
85 caps->min_orient = mt->abs[MTDEV_ORIENTATION].minimum;
86 caps->max_orient = mt->abs[MTDEV_ORIENTATION].maximum;
87 caps->min_press = mt->abs[MTDEV_PRESSURE].minimum;
88 caps->max_press = mt->abs[MTDEV_PRESSURE].maximum;
89 if (caps->min_x == caps->max_x) {
90 caps->min_x = 0;
91 caps->max_x = 1024;
92 }
93 if (caps->min_y == caps->max_y) {
94 caps->min_y = 0;
95 caps->max_y = 768;
96 }
97 if (caps->min_orient == caps->max_orient)
98 caps->max_orient = 1;
99 if (caps->min_orient + caps->max_orient != 0)
100 caps->min_orient = -caps->max_orient;
101 if (caps->min_press == caps->max_press) {
102 caps->min_press = 0;
103 caps->max_press = 256;
104 }
105}
106
107float touch_angle(const struct touch_dev *dev, int orient)
108{
109 const struct touch_caps *caps = &dev->caps;
110 return orient / caps->max_orient * M_PI_2;
111}
112
113float touch_pressure(const struct touch_dev *dev, int press)
114{
115 const struct touch_caps *caps = &dev->caps;
116 return (press - caps->min_press) / (caps->max_press - caps->min_press);
117}