R/Ryujinx/Ui/JoystickController.cs

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C#
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using OpenTK;
using OpenTK.Input;
using Ryujinx.Common.Configuration.Hid;
using Ryujinx.HLE.HOS.Services.Hid;
using System;
using ControllerConfig = Ryujinx.Common.Configuration.Hid.ControllerConfig;
namespace Ryujinx.Ui
{
public class JoystickController
{
private readonly ControllerConfig _config;
public JoystickController(ControllerConfig config)
{
_config = config;
}
private bool IsEnabled()
{
return Joystick.GetState(_config.Index).IsConnected;
}
public ControllerKeys GetButtons()
{
// NOTE: This should be initialized AFTER GTK for compat reasons with OpenTK SDL2 backend and GTK on Linux.
// BODY: Usage of Joystick.GetState must be defer to after GTK full initialization. Otherwise, GTK will segfault because SDL2 was already init *sighs*
if (!IsEnabled())
{
return 0;
}
JoystickState joystickState = Joystick.GetState(_config.Index);
ControllerKeys buttons = 0;
if (IsActivated(joystickState, _config.LeftJoycon.DPadUp)) buttons |= ControllerKeys.DpadUp;
if (IsActivated(joystickState, _config.LeftJoycon.DPadDown)) buttons |= ControllerKeys.DpadDown;
if (IsActivated(joystickState, _config.LeftJoycon.DPadLeft)) buttons |= ControllerKeys.DpadLeft;
if (IsActivated(joystickState, _config.LeftJoycon.DPadRight)) buttons |= ControllerKeys.DpadRight;
if (IsActivated(joystickState, _config.LeftJoycon.StickButton)) buttons |= ControllerKeys.LStick;
if (IsActivated(joystickState, _config.LeftJoycon.ButtonMinus)) buttons |= ControllerKeys.Minus;
if (IsActivated(joystickState, _config.LeftJoycon.ButtonL)) buttons |= ControllerKeys.L;
if (IsActivated(joystickState, _config.LeftJoycon.ButtonZl)) buttons |= ControllerKeys.Zl;
if (IsActivated(joystickState, _config.LeftJoycon.ButtonSl)) buttons |= ControllerKeys.SlLeft;
if (IsActivated(joystickState, _config.LeftJoycon.ButtonSr)) buttons |= ControllerKeys.SrLeft;
if (IsActivated(joystickState, _config.RightJoycon.ButtonA)) buttons |= ControllerKeys.A;
if (IsActivated(joystickState, _config.RightJoycon.ButtonB)) buttons |= ControllerKeys.B;
if (IsActivated(joystickState, _config.RightJoycon.ButtonX)) buttons |= ControllerKeys.X;
if (IsActivated(joystickState, _config.RightJoycon.ButtonY)) buttons |= ControllerKeys.Y;
if (IsActivated(joystickState, _config.RightJoycon.StickButton)) buttons |= ControllerKeys.RStick;
if (IsActivated(joystickState, _config.RightJoycon.ButtonPlus)) buttons |= ControllerKeys.Plus;
if (IsActivated(joystickState, _config.RightJoycon.ButtonR)) buttons |= ControllerKeys.R;
if (IsActivated(joystickState, _config.RightJoycon.ButtonZr)) buttons |= ControllerKeys.Zr;
if (IsActivated(joystickState, _config.RightJoycon.ButtonSl)) buttons |= ControllerKeys.SlRight;
if (IsActivated(joystickState, _config.RightJoycon.ButtonSr)) buttons |= ControllerKeys.SrRight;
return buttons;
}
private bool IsActivated(JoystickState joystickState, ControllerInputId controllerInputId)
{
if (controllerInputId <= ControllerInputId.Button20)
{
return joystickState.IsButtonDown((int)controllerInputId);
}
else if (controllerInputId <= ControllerInputId.Axis5)
{
int axis = controllerInputId - ControllerInputId.Axis0;
return joystickState.GetAxis(axis) > _config.TriggerThreshold;
}
else if (controllerInputId <= ControllerInputId.Hat2Right)
{
int hat = (controllerInputId - ControllerInputId.Hat0Up) / 4;
int baseHatId = (int)ControllerInputId.Hat0Up + (hat * 4);
JoystickHatState hatState = joystickState.GetHat((JoystickHat)hat);
if (hatState.IsUp && ((int)controllerInputId % baseHatId == 0)) return true;
if (hatState.IsDown && ((int)controllerInputId % baseHatId == 1)) return true;
if (hatState.IsLeft && ((int)controllerInputId % baseHatId == 2)) return true;
if (hatState.IsRight && ((int)controllerInputId % baseHatId == 3)) return true;
}
return false;
}
public (short, short) GetLeftStick()
{
if (!IsEnabled())
{
return (0, 0);
}
return GetStick(_config.LeftJoycon.StickX, _config.LeftJoycon.StickY, _config.DeadzoneLeft);
}
public (short, short) GetRightStick()
{
if (!IsEnabled())
{
return (0, 0);
}
return GetStick(_config.RightJoycon.StickX, _config.RightJoycon.StickY, _config.DeadzoneRight);
}
private (short, short) GetStick(ControllerInputId stickXInputId, ControllerInputId stickYInputId, float deadzone)
{
if (stickXInputId < ControllerInputId.Axis0 || stickXInputId > ControllerInputId.Axis5 ||
stickYInputId < ControllerInputId.Axis0 || stickYInputId > ControllerInputId.Axis5)
{
return (0, 0);
}
JoystickState jsState = Joystick.GetState(_config.Index);
int xAxis = stickXInputId - ControllerInputId.Axis0;
int yAxis = stickYInputId - ControllerInputId.Axis0;
float xValue = jsState.GetAxis(xAxis);
float yValue = -jsState.GetAxis(yAxis); // Invert Y-axis
return ApplyDeadzone(new Vector2(xValue, yValue), deadzone);
}
private (short, short) ApplyDeadzone(Vector2 axis, float deadzone)
{
return (ClampAxis(MathF.Abs(axis.X) > deadzone ? axis.X : 0f),
ClampAxis(MathF.Abs(axis.Y) > deadzone ? axis.Y : 0f));
}
private static short ClampAxis(float value)
{
if (value <= -short.MaxValue)
{
return -short.MaxValue;
}
else
{
return (short)(value * short.MaxValue);
}
}
}
}