private void HandlePointerButton(MouseDevice mouse, PointerEvent e)
{
if (mouse != null)
{
mouse.State.SetIsConnected(true);
MouseButton button = Evdev.GetMouseButton(e.Button);
ButtonState state = e.ButtonState;
mouse.State[(MouseButton)button] = state == ButtonState.Pressed;
}
}
private unsafe static void QueryCapabilities(LinuxJoystickDetails stick,
byte *axisbit, int axisbytes,
byte *keybit, int keybytes,
out int axes, out int buttons, out int hats)
{
// Note: since we are trying to be compatible with the SDL2 gamepad database,
// we have to match SDL2 behavior bug-for-bug. This means:
// HAT0-HAT3 are all reported as hats (even if the docs say that HAT1 and HAT2 can be analogue triggers)
// DPAD buttons are reported as buttons, not as hats (unlike Windows and Mac OS X)
axes = buttons = hats = 0;
for (EvdevAxis axis = 0; axis < EvdevAxis.CNT && (int)axis < axisbytes * 8; axis++)
{
InputAbsInfo info;
bool is_valid = true;
is_valid &= TestBit(axisbit, (int)axis);
is_valid &= Evdev.GetAbs(stick.FileDescriptor, axis, out info) >= 0;
if (is_valid)
{
if (axis >= EvdevAxis.HAT0X && axis <= EvdevAxis.HAT3Y)
{
// Analogue hat
stick.AxisMap.Add(axis, new AxisInfo
{
Axis = (int)(JoystickHat)hats++,
Info = info
});
}
else
{
// Regular axis
stick.AxisMap.Add(axis, new AxisInfo
{
Axis = axes++,
Info = info
});
}
}
}
for (EvdevButton button = 0; button < EvdevButton.Last && (int)button < keybytes * 8; button++)
{
if (TestBit(keybit, (int)button))
{
stick.ButtonMap.Add(button, buttons++);
}
}
}
private LinuxJoystickDetails OpenJoystick(string path)
{
LinuxJoystickDetails stick = null;
int number = GetJoystickNumber(Path.GetFileName(path));
if (number >= 0)
{
int fd = -1;
try
{
fd = Libc.open(path, OpenFlags.NonBlock);
if (fd == -1)
{
return(null);
}
unsafe
{
const int evsize = Evdev.EventCount / 8;
const int axissize = Evdev.AxisCount / 8;
const int keysize = Evdev.KeyCount / 8;
byte * evbit = stackalloc byte[evsize];
byte * axisbit = stackalloc byte[axissize];
byte * keybit = stackalloc byte[keysize];
string name;
EvdevInputId id;
// Ensure this is a joystick device
bool is_valid = true;
is_valid &= Evdev.GetBit(fd, 0, evsize, new IntPtr(evbit)) >= 0;
is_valid &= Evdev.GetBit(fd, EvdevType.ABS, axissize, new IntPtr(axisbit)) >= 0;
is_valid &= Evdev.GetBit(fd, EvdevType.KEY, keysize, new IntPtr(keybit)) >= 0;
is_valid &= TestBit(evbit, (int)EvdevType.KEY);
is_valid &= TestBit(evbit, (int)EvdevType.ABS);
is_valid &= TestBit(axisbit, (int)EvdevAxis.X);
is_valid &= TestBit(axisbit, (int)EvdevAxis.Y);
is_valid &= Evdev.GetName(fd, out name) >= 0;
is_valid &= Evdev.GetId(fd, out id) >= 0;
if (is_valid)
{
stick = new LinuxJoystickDetails
{
FileDescriptor = fd,
PathIndex = number,
State = new JoystickState(),
Name = name,
Guid = CreateGuid(id, name),
};
int axes, buttons, hats;
QueryCapabilities(stick, axisbit, axissize, keybit, keysize,
out axes, out buttons, out hats);
stick.Caps = new JoystickCapabilities(axes, buttons, hats, false);
// Poll the joystick once, to initialize its state
PollJoystick(stick);
}
}
Debug.Print("Found joystick on path {0}", path);
}
catch (Exception e)
{
Debug.Print("Error opening joystick: {0}", e.ToString());
}
finally
{
if (stick == null && fd != -1)
{
// Not a joystick
Libc.close(fd);
}
}
}
return(stick);
}