int
evdev_device_dispatch(struct evdev_device *device)
{
int fd = device->fd;
struct input_event ev[32];
int len;
/* If the compositor is repainting, this function is called only once
* per frame and we have to process all the events available on the
* fd, otherwise there will be input lag. */
do {
if (device->mtdev)
len = mtdev_get(device->mtdev, fd, ev,
ARRAY_LENGTH(ev)) *
sizeof (struct input_event);
else
len = read(fd, &ev, sizeof ev);
if (len < 0 || len % sizeof ev[0] != 0) {
if (len < 0 && errno != EAGAIN && errno != EINTR) {
device->base.device_interface->device_lost(
device->base.device_interface_data);
}
return 1;
}
evdev_process_events(device, ev, len / sizeof ev[0]);
} while (len > 0);
return 1;
}
static int
evdev_device_data(int fd, uint32_t mask, void *data)
{
struct weston_compositor *ec;
struct evdev_device *device = data;
struct input_event ev[32];
int len;
ec = device->seat->compositor;
if (!ec->focus)
return 1;
/* If the compositor is repainting, this function is called only once
* per frame and we have to process all the events available on the
* fd, otherwise there will be input lag. */
do {
if (device->mtdev)
len = mtdev_get(device->mtdev, fd, ev,
ARRAY_LENGTH(ev)) *
sizeof (struct input_event);
else
len = read(fd, &ev, sizeof ev);
if (len < 0 || len % sizeof ev[0] != 0) {
/* FIXME: call evdev_device_destroy when errno is ENODEV. */
return 1;
}
evdev_process_events(device, ev, len / sizeof ev[0]);
} while (len > 0);
return 1;
}
int main(int argc, char *argv[])
{
struct input_event ev;
m_dpy = XOpenDisplay(NULL);
if (!m_dpy)
printf("fail top open x display\n");
m_fd = open(argv[1] ? argv[1] : DEVICE, O_RDONLY);
if (m_fd == -1) {
printf("fail to open device\n");
return -1;
}
if (m_dev = mtdev_new_open(m_fd)) {
unlink(SAMPLE_FILE);
m_sample_file.open(SAMPLE_FILE);
CHECK(m_dev, ABS_MT_SLOT);
CHECK(m_dev, ABS_MT_TOUCH_MAJOR);
CHECK(m_dev, ABS_MT_TOUCH_MINOR);
CHECK(m_dev, ABS_MT_WIDTH_MAJOR);
CHECK(m_dev, ABS_MT_WIDTH_MINOR);
CHECK(m_dev, ABS_MT_ORIENTATION);
CHECK(m_dev, ABS_MT_POSITION_X);
CHECK(m_dev, ABS_MT_POSITION_Y);
CHECK(m_dev, ABS_MT_TOOL_TYPE);
CHECK(m_dev, ABS_MT_BLOB_ID);
CHECK(m_dev, ABS_MT_TRACKING_ID);
CHECK(m_dev, ABS_MT_PRESSURE);
CHECK(m_dev, ABS_MT_DISTANCE);
CHECK(m_dev, ABS_MT_TOOL_X);
CHECK(m_dev, ABS_MT_TOOL_Y);
printf("ctrl+c to quit\n");
signal(SIGINT, m_signal_callback_handler);
while (mtdev_get(m_dev, m_fd, &ev, 1) * sizeof(struct input_event))
m_process_event(&ev);
}
return 0;
}
static void loop_device(int fd)
{
struct mtdev dev;
struct input_event ev;
int ret = mtdev_open(&dev, fd);
if (ret) {
fprintf(stderr, "error: could not open device: %d\n", ret);
return;
}
show_props(&dev);
/* while the device has not been inactive for five seconds */
while (!mtdev_idle(&dev, fd, 5000)) {
/* extract all available processed events */
while (mtdev_get(&dev, fd, &ev, 1) > 0) {
if (use_event(&ev))
print_event(&ev);
}
}
mtdev_close(&dev);
}
