Mesen-SX/Windows/XInputManager.cpp

#include "stdafx.h"
#include "XInputManager.h"
#include "../Core/Console.h"
#include "../Core/EmuSettings.h"

XInputManager::XInputManager(shared_ptr<Console> console)
{
	_console = console;
	for (int i = 0; i < XUSER_MAX_COUNT; i++)
	{
		_gamePadStates.push_back(shared_ptr<XINPUT_STATE>(new XINPUT_STATE()));
		_gamePadConnected.push_back(true);
	}
}

void XInputManager::RefreshState()
{
	XINPUT_STATE state;
	for (DWORD i = 0; i < XUSER_MAX_COUNT; i++)
	{
		if (_gamePadConnected[i])
		{
			if (XInputGetState(i, &state) != ERROR_SUCCESS)
			{
				//XInputGetState is incredibly slow when no controller is plugged in
				ZeroMemory(_gamePadStates[i].get(), sizeof(XINPUT_STATE));
				_gamePadConnected[i] = false;
			}
			else
			{
				*_gamePadStates[i] = state;
			}
		}
	}
}

bool XInputManager::NeedToUpdate()
{
	for (int i = 0; i < XUSER_MAX_COUNT; i++)
	{
		if (!_gamePadConnected[i])
		{
			XINPUT_STATE state;
			if (XInputGetState(i, &state) == ERROR_SUCCESS)
			{
				return true;
			}
		}
	}
	return false;
}

void XInputManager::UpdateDeviceList()
{
	//Periodically detect if a controller has been plugged in to allow controllers to be plugged in after the emu is started
	for (int i = 0; i < XUSER_MAX_COUNT; i++)
	{
		_gamePadConnected[i] = true;
	}
}

bool XInputManager::IsPressed(uint8_t gamepadPort, uint8_t button)
{
	if (_gamePadConnected[gamepadPort])
	{
		XINPUT_GAMEPAD& gamepad = _gamePadStates[gamepadPort]->Gamepad;
		if (button <= 16)
		{
			WORD xinputButton = 1 << (button - 1);
			return (_gamePadStates[gamepadPort]->Gamepad.wButtons & xinputButton) != 0;
		}
		else
		{
			double ratio = _console->GetSettings()->GetControllerDeadzoneRatio() * 2;

			switch (button)
			{
			case 17: return gamepad.bLeftTrigger > (XINPUT_GAMEPAD_TRIGGER_THRESHOLD * ratio);
			case 18: return gamepad.bRightTrigger > (XINPUT_GAMEPAD_TRIGGER_THRESHOLD * ratio);
			case 19: return gamepad.sThumbRY > (XINPUT_GAMEPAD_RIGHT_THUMB_DEADZONE * ratio);
			case 20: return gamepad.sThumbRY < -(XINPUT_GAMEPAD_RIGHT_THUMB_DEADZONE * ratio);
			case 21: return gamepad.sThumbRX < -(XINPUT_GAMEPAD_RIGHT_THUMB_DEADZONE * ratio);
			case 22: return gamepad.sThumbRX > (XINPUT_GAMEPAD_RIGHT_THUMB_DEADZONE * ratio);
			case 23: return gamepad.sThumbLY > (XINPUT_GAMEPAD_LEFT_THUMB_DEADZONE * ratio);
			case 24: return gamepad.sThumbLY < -(XINPUT_GAMEPAD_LEFT_THUMB_DEADZONE * ratio);
			case 25: return gamepad.sThumbLX < -(XINPUT_GAMEPAD_LEFT_THUMB_DEADZONE * ratio);
			case 26: return gamepad.sThumbLX > (XINPUT_GAMEPAD_LEFT_THUMB_DEADZONE * ratio);
			}
		}
	}
	return false;
}