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Support gamepads (and other devices) via evdev interface, query axis+button availability

This commit is contained in:
rdb 2015-12-11 19:32:45 +01:00
parent bd0683d101
commit 58ddd77d5e
2 changed files with 56 additions and 5 deletions
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50
panda/src/device/evdevInputDevice.cxx
View File

@ -25,6 +25,11 @@
#define test_bit(bit, array) ((array)[(bit)/8] & (1<<((bit)&7)))
static InputDevice::ControlAxis axis_map[] = {
InputDevice::C_left_x, InputDevice::C_left_y, InputDevice::C_left_trigger,
InputDevice::C_right_x, InputDevice::C_right_y, InputDevice::C_right_trigger
};
TypeHandle EvdevInputDevice::_type_handle;
////////////////////////////////////////////////////////////////////
@ -95,12 +100,15 @@ do_poll() {
////////////////////////////////////////////////////////////////////
bool EvdevInputDevice::
init_device() {
uint8_t evtypes[EV_MAX/8 + 1];
nassertr(_fd >= 0, false);
uint8_t evtypes[(EV_CNT + 7) >> 3];
memset(evtypes, 0, sizeof(evtypes));
char name[256];
char uniq[256];
if (ioctl(_fd, EVIOCGNAME(sizeof(name)), name) < 0 ||
ioctl(_fd, EVIOCGPHYS(sizeof(uniq)), uniq) < 0 ||
ioctl(_fd, EVIOCGBIT(0, EV_MAX), &evtypes) < 0) {
ioctl(_fd, EVIOCGBIT(0, sizeof(evtypes)), evtypes) < 0) {
close(_fd);
_fd = -1;
_is_connected = false;
@ -121,6 +129,35 @@ init_device() {
_name = ((string)name) + "." + uniq;
if (test_bit(EV_ABS, evtypes)) {
// Check which axes are on the device.
uint8_t axes[(ABS_CNT + 7) >> 3];
memset(axes, 0, sizeof(axes));
int num_bits = ioctl(_fd, EVIOCGBIT(EV_ABS, sizeof(axes)), axes) << 3;
for (int i = 0; i < num_bits; ++i) {
if (test_bit(i, axes)) {
if (i >= 0 && i < 6) {
set_control_map(i, axis_map[i]);
}
}
}
}
if (test_bit(EV_KEY, evtypes)) {
// Check which buttons are on the device.
uint8_t keys[(KEY_CNT + 7) >> 3];
memset(keys, 0, sizeof(keys));
int num_bits = ioctl(_fd, EVIOCGBIT(EV_KEY, sizeof(keys)), keys) << 3;
int bi = 0;
for (int i = 0; i < num_bits; ++i) {
if (test_bit(i, keys)) {
set_button_map(bi++, map_button(i));
}
}
}
if (test_bit(EV_REL, evtypes)) {
_flags |= IDF_has_pointer;
}
@ -169,6 +206,7 @@ process_events() {
int x = _pointer_data.get_x();
int y = _pointer_data.get_y();
bool have_pointer = false;
double time = ClockObject::get_global_clock()->get_frame_time();
ButtonHandle button;
@ -180,11 +218,11 @@ process_events() {
case EV_REL:
if (events[i].code == REL_X) x += events[i].value;
if (events[i].code == REL_Y) y += events[i].value;
have_pointer = true;
break;
case EV_ABS:
if (events[i].code == ABS_X) x = events[i].value;
if (events[i].code == ABS_Y) y = events[i].value;
set_control_state(events[i].code, events[i].value / 32767.0);
break;
case EV_KEY:
@ -198,7 +236,9 @@ process_events() {
}
}
set_pointer(true, x, y, time);
if (have_pointer) {
set_pointer(true, x, y, time);
}
return true;
}

11
panda/src/device/inputDevice.cxx
View File

@ -239,6 +239,17 @@ set_control_state(int index, double state) {
_controls.resize(index + 1, AnalogState());
}
if (device_cat.is_spam()) {
device_cat.spam()
<< "Changed control " << index;
if (_controls[index]._axis != C_none) {
device_cat.spam(false) << " (" << _controls[index]._axis << ")";
}
device_cat.spam(false) << " to " << state << "\n";
}
_controls[index]._state = state;
_controls[index]._known = true;
}