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
212
213
214
215
216
217
218
219
220
221
222
|
#include <X11/Xlib.h>
#include <stdio.h>
#include <fcntl.h>
#include <utouch/frame-mtdev.h>
#include <string.h>
#include <math.h>
#define XMARG 16
#define YMARG 16
#define DEF_FRAC 0.15
#define DEF_WIDTH 0.05
#define DIM_TOUCH 32
struct windata {
Display *dsp;
Window root, win;
GC gc;
int screen, width, height;
unsigned long white, black;
unsigned long color[DIM_TOUCH];
int id[DIM_TOUCH];
};
static inline float max(float a, float b)
{
return b > a ? b : a;
}
static unsigned long new_color(struct windata *w)
{
return lrand48() & 0xffffff;
}
static void clear_screen(struct windata *w)
{
XSetForeground(w->dsp, w->gc, w->black);
XFillRectangle(w->dsp, w->win, w->gc, 0, 0, w->width, w->height);
}
static void output_touch(utouch_frame_handle fh, struct windata *w,
const struct utouch_contact *t)
{
const struct utouch_surface *s = utouch_frame_get_surface(fh);
float x1 = s->min_x, y1 = s->min_y;
float x2 = s->max_x, y2 = s->max_y;
float dx = x2 - x1, dy = y2 - y1;
float major = 0, minor = 0, angle = 0;
if (s->use_pressure) {
float p = DEF_FRAC / s->max_pressure;
major = t->pressure * p * dx;
minor = t->pressure * p * dx;
angle = 0;
}
if (s->use_touch_major) {
major = t->touch_major;
minor = t->touch_minor;
angle = t->orientation;
}
if (major == 0 && minor == 0) {
major = DEF_WIDTH * dy;
minor = DEF_WIDTH * dx;
}
float ac = fabs(cos(angle));
float as = fabs(sin(angle));
float mx = max(minor * ac, major * as);
float my = max(major * ac, minor * as);
float ux = t->x - 0.5 * mx;
float uy = t->y - 0.5 * my;
float vx = t->x + 0.5 * mx;
float vy = t->y + 0.5 * my;
float px = (ux - x1) / dx * w->width;
float py = (uy - y1) / dy * w->height;
float qx = (vx - x1) / dx * w->width;
float qy = (vy - y1) / dy * w->height;
if (w->id[t->slot] != t->id) {
w->id[t->slot] = t->id;
w->color[t->slot] = new_color(w);
}
XSetForeground(w->dsp, w->gc, w->color[t->slot]);
XFillArc(w->dsp, w->win, w->gc, px, py, qx - px, qy - py, 0, 360 * 64);
XFlush(w->dsp);
}
static void report_frame(utouch_frame_handle fh,
const struct utouch_frame *frame,
struct windata *w)
{
int i;
for (i = 0; i < frame->num_active; i++)
output_touch(fh, w, frame->active[i]);
}
static void event_loop(utouch_frame_handle fh,
struct mtdev *dev, int fd,
struct windata *w)
{
const struct utouch_frame *frame;
struct input_event iev;
XEvent xev;
XSelectInput(w->dsp, w->win,
ButtonPressMask | ButtonReleaseMask |
ExposureMask | StructureNotifyMask);
clear_screen(w);
while (1) {
while (!mtdev_idle(dev, fd, 100)) {
while (mtdev_get(dev, fd, &iev, 1) > 0) {
frame = utouch_frame_pump_mtdev(fh, &iev);
if (frame)
report_frame(fh, frame, w);
}
}
while (XPending(w->dsp)) {
XNextEvent(w->dsp, &xev);
}
}
}
static void run_window(utouch_frame_handle fh, struct mtdev *dev, int fd)
{
struct windata w;
int i;
memset(&w, 0, sizeof(w));
for (i = 0; i < DIM_TOUCH; i++)
w.id[i] = -1;
w.dsp = XOpenDisplay(NULL);
if (!w.dsp)
return;
w.screen = DefaultScreen(w.dsp);
w.white = WhitePixel(w.dsp, w.screen);
w.black = BlackPixel(w.dsp, w.screen);
w.width = DisplayWidth(w.dsp, w.screen) - XMARG;
w.height = DisplayHeight(w.dsp, w.screen) - YMARG;
w.root = DefaultRootWindow(w.dsp);
w.win = XCreateSimpleWindow(w.dsp, w.root,
0, 0, w.width, w.height,
0, w.black, w.white);
XMapWindow(w.dsp, w.win);
long eventMask = StructureNotifyMask;
XSelectInput(w.dsp, w.win, eventMask);
XEvent ev;
do {
XNextEvent(w.dsp, &ev);
} while (ev.type != MapNotify);
w.gc = XCreateGC(w.dsp, w.win, 0, NULL);
event_loop(fh, dev, fd, &w);
XDestroyWindow(w.dsp, w.win);
XCloseDisplay(w.dsp);
}
int main(int argc, char *argv[])
{
struct evemu_device *evemu;
struct mtdev *mtdev;
utouch_frame_handle fh;
int fd;
if (argc < 2) {
fprintf(stderr, "Usage: %s <device>\n", argv[0]);
return -1;
}
fd = open(argv[1], O_RDONLY | O_NONBLOCK);
if (fd < 0) {
fprintf(stderr, "error: could not open device\n");
return -1;
}
if (ioctl(fd, EVIOCGRAB, 1)) {
fprintf(stderr, "error: could not grab the device\n");
return -1;
}
evemu = evemu_new(0);
if (!evemu || evemu_extract(evemu, fd)) {
fprintf(stderr, "error: could not describe device\n");
return -1;
}
if (!utouch_frame_is_supported_mtdev(evemu)) {
fprintf(stderr, "error: unsupported device\n");
return -1;
}
mtdev = mtdev_new_open(fd);
if (!mtdev) {
fprintf(stderr, "error: could not open mtdev\n");
return -1;
}
fh = utouch_frame_new_engine(100, 32, 100);
if (!fh || utouch_frame_init_mtdev(fh, evemu)) {
fprintf(stderr, "error: could not init frame\n");
return -1;
}
run_window(fh, mtdev, fd);
utouch_frame_delete_engine(fh);
mtdev_close_delete(mtdev);
evemu_delete(evemu);
ioctl(fd, EVIOCGRAB, 0);
close(fd);
return 0;
}
|
