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olcPGEX_Gamepad.h
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/*
This PGEX was made possible by the following people:
-Testers
My Girlfriend (Thx for letting me borrow your time)
Dragoneye
Javid
KrossX
MaGetzUb
Tutas
Zleapingbear
Huhlig
Bispoo
Lett1
Thx for KrossX for giving me a link to his original work, which helped solve a
few problems
*/
#include "olcPixelGameEngine.h"
#include <string>
#include <utility>
#include <vector>
#pragma region Class Declaration
#ifndef OLC_PGEX_GAMEPAD
#define OLC_PGEX_GAMEPAD
#ifdef WIN32
#include <dinput.h>
#pragma comment(lib, "dinput8.lib")
#pragma comment(lib, "dxguid.lib")
#pragma comment(lib, "ole32.lib")
#pragma comment(lib, "oleaut32.lib")
#include <oleauto.h>
#include <wbemidl.h>
#if _WIN32_WINNT == _WIN32_WINNT_NT4
#define CURVERSION _WIN32_WINNT_NT4
#elif _WIN32_WINNT == _WIN32_WINNT_WIN2K
#define CURVERSION _WIN32_WINNT_WIN2K
#elif _WIN32_WINNT == _WIN32_WINNT_WINXP
#define CURVERSION _WIN32_WINNT_WINXP
#elif _WIN32_WINNT == _WIN32_WINNT_WS03
#define CURVERSION _WIN32_WINNT_WS03
#elif _WIN32_WINNT == _WIN32_WINNT_WIN6
#define CURVERSION _WIN32_WINNT_WIN6
#elif _WIN32_WINNT == _WIN32_WINNT_WIN7
#define CURVERSION _WIN32_WINNT_WIN7
#elif _WIN32_WINNT == _WIN32_WINNT_WIN8
#define CURVERSION _WIN32_WINNT_WIN8
#elif _WIN32_WINNT == _WIN32_WINNT_WINBLUE
#define CURVERSION _WIN32_WINNT_WINBLUE
#elif _WIN32_WINNT == _WIN32_WINNT_WINXP
#define CURVERSION _WIN32_WINNT_WINXP
#elif _WIN32_WINNT == _WIN32_WINNT_WIN10
#define CURVERSION _WIN32_WINNT_WIN10
#endif
#undef _WIN32_WINNT
#define _WIN32_WINNT 1
#include <Xinput.h>
#undef _WIN32_WINNT
#define _WIN32_WINNT CURVERSION
#pragma comment(lib, "xinput9_1_0.lib")
#endif
#ifdef __linux__
#include <cstring>
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <linux/input.h>
#include <optional>
#include <sys/inotify.h>
#include <sys/stat.h>
#include <unistd.h>
#endif
namespace olc {
#pragma region Enums
#define GP_BUTTON_COUNT 18
#define GP_AXIS_COUNT 8
enum class GPButtons {
FACE_D = 1,
FACE_L = 0,
FACE_R = 2,
FACE_U = 3,
L1 = 4,
L2 = 6,
L3 = 10,
R1 = 5,
R2 = 7,
R3 = 11,
SELECT = 8,
START = 9,
DPAD_L = 14,
DPAD_R = 15,
DPAD_U = 16,
DPAD_D = 17
};
enum class GPAxes {
LX = 1,
LY = 0,
RX = 5,
RY = 2,
TL = 4,
TR = 3,
DX = 6,
DY = 7,
};
#pragma endregion
class GamePad : public olc::PGEX {
public:
#ifdef WIN32
GamePad(LPCDIDEVICEINSTANCEA lpddi);
GamePad(DWORD xId);
#endif
#ifdef __linux__
GamePad(std::string path, int fd);
#endif
#ifdef __EMSCRIPTEN__
// TODO ctor
GamePad(long id, std::string name);
#endif
GamePad(const GamePad &other) = delete;
~GamePad();
static void init();
static std::vector<GamePad *> &getGamepads();
float getAxis(GPAxes a);
bool hasAxis(GPAxes a);
HWButton getButton(GPButtons b);
bool hasButton(GPButtons b);
std::string getName();
std::string getId();
bool stillConnected = true;
[[nodiscard]] int getAxisCount() const;
[[nodiscard]] int getButtonCount() const;
void startVibration(float strength = 1) const;
void stopVibration() const;
static GamePad *selectWithButton(olc::GPButtons b);
protected:
void OnBeforeUserUpdate(float &fElapsedTime) override;
private:
GamePad() = default;
void poll();
static std::vector<GamePad *> gamepads;
static void updateGamepads();
std::string name;
int axisCount = GP_AXIS_COUNT;
int buttonCount = GP_BUTTON_COUNT;
float axes[GP_AXIS_COUNT]{0};
olc::HWButton buttons[GP_BUTTON_COUNT];
bool ff = false;
bool availableButtons[GP_BUTTON_COUNT] = {false};
bool availableAxes[GP_AXIS_COUNT] = {false};
void handleButton(int id, bool value);
#ifdef WIN32
LPDIRECTINPUTDEVICE8A thisDevice;
std::vector<int> axisPositions;
LPDIRECTINPUTEFFECT effect = nullptr;
bool xInput = false;
DWORD xId;
static std::thread deviceEnumThread;
static IDirectInput8A *dev;
#endif
#ifdef __linux__
int fd = -1;
ff_effect effect{};
std::vector<int> maxAbs;
std::string path;
void reconnect();
bool readEvent(input_event &event) const;
static void enumerateGamepads();
static GamePad *openGamepad(const std::string &path);
static X11::Display *display;
static std::optional<int> inotifyFd;
constexpr static const int32_t buttonCodes[GP_BUTTON_COUNT]{
BTN_X,
BTN_A,
BTN_B,
BTN_Y,
BTN_TL,
BTN_TR,
BTN_TL2,
BTN_TR2,
BTN_SELECT,
BTN_START,
BTN_THUMBL,
BTN_THUMBR,
0,
0,
BTN_DPAD_LEFT,
BTN_DPAD_RIGHT,
BTN_DPAD_UP,
BTN_DPAD_DOWN};
constexpr static const int32_t axisCodes[GP_AXIS_COUNT]{
ABS_Y, ABS_X, ABS_RY, ABS_RZ,
ABS_Z, ABS_RX, ABS_HAT0X, ABS_HAT0Y};
#endif
#ifdef __EMSCRIPTEN__
long id;
constexpr static const int32_t buttonCodes[GP_BUTTON_COUNT]{
2, 0, 1, 3, 4, 5, 6, 7, 8, 9, 10, 11, 0, 0, 14, 15, 12, 13};
#endif
};
} // namespace olc
#endif
#pragma endregion
#ifdef OLC_PGE_GAMEPAD
#undef OLC_PGE_GAMEPAD
#pragma region Custom Dataformat
#ifdef WIN32
struct GamePadState {
DWORD axes[GP_AXIS_COUNT];
DWORD povHat;
BYTE buttons[GP_BUTTON_COUNT];
};
#ifndef DIDFT_OPTIONAL
constexpr DWORD DIDFT_OPTIONAL = 0x80000000;
#endif
DIOBJECTDATAFORMAT g_aObjectFormats[27] = {
{0, (DWORD)FIELD_OFFSET(GamePadState, axes[1]),
DIDFT_AXIS | DIDFT_ANYINSTANCE, 0},
{0, (DWORD)FIELD_OFFSET(GamePadState, axes[0]),
DIDFT_AXIS | DIDFT_ANYINSTANCE, 0},
{0, (DWORD)FIELD_OFFSET(GamePadState, axes[3]),
DIDFT_AXIS | DIDFT_ANYINSTANCE | DIDFT_OPTIONAL, 0},
{0, (DWORD)FIELD_OFFSET(GamePadState, axes[2]),
DIDFT_AXIS | DIDFT_ANYINSTANCE | DIDFT_OPTIONAL, 0},
{0, (DWORD)FIELD_OFFSET(GamePadState, axes[4]),
DIDFT_AXIS | DIDFT_ANYINSTANCE | DIDFT_OPTIONAL, 0},
{0, (DWORD)FIELD_OFFSET(GamePadState, axes[5]),
DIDFT_AXIS | DIDFT_ANYINSTANCE | DIDFT_OPTIONAL, 0},
{0, (DWORD)FIELD_OFFSET(GamePadState, povHat),
DIDFT_POV | DIDFT_ANYINSTANCE, 0},
{0, (DWORD)FIELD_OFFSET(GamePadState, buttons[0]),
DIDFT_BUTTON | DIDFT_ANYINSTANCE | 0x80000000, 0},
{0, (DWORD)FIELD_OFFSET(GamePadState, buttons[1]),
DIDFT_BUTTON | DIDFT_ANYINSTANCE | 0x80000000, 0},
{0, (DWORD)FIELD_OFFSET(GamePadState, buttons[2]),
DIDFT_BUTTON | DIDFT_ANYINSTANCE | 0x80000000, 0},
{0, (DWORD)FIELD_OFFSET(GamePadState, buttons[3]),
DIDFT_BUTTON | DIDFT_ANYINSTANCE | 0x80000000, 0},
{0, (DWORD)FIELD_OFFSET(GamePadState, buttons[4]),
DIDFT_BUTTON | DIDFT_ANYINSTANCE | 0x80000000, 0},
{0, (DWORD)FIELD_OFFSET(GamePadState, buttons[5]),
DIDFT_BUTTON | DIDFT_ANYINSTANCE | 0x80000000, 0},
{0, (DWORD)FIELD_OFFSET(GamePadState, buttons[6]),
DIDFT_BUTTON | DIDFT_ANYINSTANCE | 0x80000000, 0},
{0, (DWORD)FIELD_OFFSET(GamePadState, buttons[7]),
DIDFT_BUTTON | DIDFT_ANYINSTANCE | 0x80000000, 0},
{0, (DWORD)FIELD_OFFSET(GamePadState, buttons[8]),
DIDFT_BUTTON | DIDFT_ANYINSTANCE | 0x80000000, 0},
{0, (DWORD)FIELD_OFFSET(GamePadState, buttons[9]),
DIDFT_BUTTON | DIDFT_ANYINSTANCE | 0x80000000, 0},
{0, (DWORD)FIELD_OFFSET(GamePadState, buttons[10]),
DIDFT_BUTTON | DIDFT_ANYINSTANCE | 0x80000000, 0},
{0, (DWORD)FIELD_OFFSET(GamePadState, buttons[11]),
DIDFT_BUTTON | DIDFT_ANYINSTANCE | 0x80000000, 0},
{0, (DWORD)FIELD_OFFSET(GamePadState, buttons[12]),
DIDFT_BUTTON | DIDFT_ANYINSTANCE | 0x80000000, 0},
{0, (DWORD)FIELD_OFFSET(GamePadState, buttons[13]),
DIDFT_BUTTON | DIDFT_ANYINSTANCE | 0x80000000, 0},
{0, (DWORD)FIELD_OFFSET(GamePadState, buttons[14]),
DIDFT_BUTTON | DIDFT_ANYINSTANCE | 0x80000000, 0},
{0, (DWORD)FIELD_OFFSET(GamePadState, buttons[15]),
DIDFT_BUTTON | DIDFT_ANYINSTANCE | 0x80000000, 0},
{0, (DWORD)FIELD_OFFSET(GamePadState, buttons[16]),
DIDFT_BUTTON | DIDFT_ANYINSTANCE | 0x80000000, 0},
{0, (DWORD)FIELD_OFFSET(GamePadState, buttons[17]),
DIDFT_BUTTON | DIDFT_ANYINSTANCE | 0x80000000, 0},
{0, (DWORD)FIELD_OFFSET(GamePadState, buttons[18]),
DIDFT_BUTTON | DIDFT_ANYINSTANCE | 0x80000000, 0},
{0, (DWORD)FIELD_OFFSET(GamePadState, buttons[19]),
DIDFT_BUTTON | DIDFT_ANYINSTANCE | 0x80000000, 0},
};
DIDATAFORMAT gamepad = {sizeof(DIDATAFORMAT),
sizeof(DIOBJECTDATAFORMAT),
DIDF_ABSAXIS,
sizeof(GamePadState),
27,
g_aObjectFormats};
#endif
#pragma endregion
#pragma region Class Definition
#pragma region Platform Dependent
#pragma region Windows
#ifdef WIN32
IDirectInput8A *olc::GamePad::dev = nullptr;
std::thread olc::GamePad::deviceEnumThread;
#define SAFE_RELEASE(p) \
{ \
if ((p)) { \
(p)->Release(); \
(p) = 0; \
} \
}
BOOL IsXInputDevice(const GUID *pGuidProductFromDirectInput) {
IWbemLocator *pIWbemLocator = NULL;
IEnumWbemClassObject *pEnumDevices = NULL;
IWbemClassObject *pDevices[20] = {0};
IWbemServices *pIWbemServices = NULL;
BSTR bstrNamespace = NULL;
BSTR bstrDeviceID = NULL;
BSTR bstrClassName = NULL;
DWORD uReturned = 0;
bool bIsXinputDevice = false;
UINT iDevice = 0;
VARIANT var;
HRESULT hr;
// CoInit if needed
hr = CoInitialize(NULL);
bool bCleanupCOM = SUCCEEDED(hr);
// So we can call VariantClear() later, even if we never had a successful
// IWbemClassObject::Get().
VariantInit(&var);
// Create WMI
hr = CoCreateInstance(__uuidof(WbemLocator), NULL, CLSCTX_INPROC_SERVER,
__uuidof(IWbemLocator), (LPVOID *)&pIWbemLocator);
if (FAILED(hr) || pIWbemLocator == NULL)
goto LCleanup;
bstrNamespace = SysAllocString(L"\\\\.\\root\\cimv2");
if (bstrNamespace == NULL)
goto LCleanup;
bstrClassName = SysAllocString(L"Win32_PNPEntity");
if (bstrClassName == NULL)
goto LCleanup;
bstrDeviceID = SysAllocString(L"DeviceID");
if (bstrDeviceID == NULL)
goto LCleanup;
// Connect to WMI
hr = pIWbemLocator->ConnectServer(bstrNamespace, NULL, NULL, 0L, 0L, NULL,
NULL, &pIWbemServices);
if (FAILED(hr) || pIWbemServices == NULL)
goto LCleanup;
// Switch security level to IMPERSONATE.
CoSetProxyBlanket(pIWbemServices, RPC_C_AUTHN_WINNT, RPC_C_AUTHZ_NONE, NULL,
RPC_C_AUTHN_LEVEL_CALL, RPC_C_IMP_LEVEL_IMPERSONATE, NULL,
EOAC_NONE);
hr = pIWbemServices->CreateInstanceEnum(bstrClassName, 0, NULL,
&pEnumDevices);
if (FAILED(hr) || pEnumDevices == NULL)
goto LCleanup;
// Loop over all devices
for (;;) {
// Get 20 at a time
hr = pEnumDevices->Next(10000, 20, pDevices, &uReturned);
if (FAILED(hr))
goto LCleanup;
if (uReturned == 0)
break;
for (iDevice = 0; iDevice < uReturned; iDevice++) {
// For each device, get its device ID
hr = pDevices[iDevice]->Get(bstrDeviceID, 0L, &var, NULL, NULL);
if (SUCCEEDED(hr) && var.vt == VT_BSTR && var.bstrVal != NULL) {
// Check if the device ID contains "IG_". If it does, then it's
// an XInput device This information can not be found from
// DirectInput
if (wcsstr(var.bstrVal, L"IG_")) {
// If it does, then get the VID/PID from var.bstrVal
DWORD dwPid = 0, dwVid = 0;
WCHAR *strVid = wcsstr(var.bstrVal, L"VID_");
if (strVid && swscanf_s(strVid, L"VID_%4X", &dwVid) != 1)
dwVid = 0;
WCHAR *strPid = wcsstr(var.bstrVal, L"PID_");
if (strPid && swscanf_s(strPid, L"PID_%4X", &dwPid) != 1)
dwPid = 0;
// Compare the VID/PID to the DInput device
DWORD dwVidPid = MAKELONG(dwVid, dwPid);
if (dwVidPid == pGuidProductFromDirectInput->Data1) {
bIsXinputDevice = true;
goto LCleanup;
}
}
}
VariantClear(&var);
SAFE_RELEASE(pDevices[iDevice]);
}
}
LCleanup:
VariantClear(&var);
if (bstrNamespace)
SysFreeString(bstrNamespace);
if (bstrDeviceID)
SysFreeString(bstrDeviceID);
if (bstrClassName)
SysFreeString(bstrClassName);
for (iDevice = 0; iDevice < 20; iDevice++)
SAFE_RELEASE(pDevices[iDevice]);
SAFE_RELEASE(pEnumDevices);
SAFE_RELEASE(pIWbemLocator);
SAFE_RELEASE(pIWbemServices);
if (bCleanupCOM)
CoUninitialize();
return bIsXinputDevice;
}
void olc::GamePad::init() {
HINSTANCE hinst = GetModuleHandle(NULL);
DirectInput8Create(hinst, DIRECTINPUT_VERSION, IID_IDirectInput8A,
(LPVOID *)&dev, NULL);
pge->pgex_Register(new olc::GamePad());
deviceEnumThread = std::thread{[&]() {
auto enumFunction = [](LPCDIDEVICEINSTANCEA lpddi, LPVOID pvRef) {
if (!(lpddi->dwDevType & DI8DEVTYPE_GAMEPAD)) {
return DIENUM_CONTINUE;
}
auto result =
reinterpret_cast<std::vector<olc::GamePad *> *>(pvRef);
if (!IsXInputDevice(&lpddi->guidProduct)) {
bool found = false;
for (auto &gamepad : *result) {
if (gamepad->getId() == lpddi->tszInstanceName) {
found = true;
if (!gamepad->stillConnected) {
gamepad->stillConnected = true;
}
break;
}
}
if (found) {
return DIENUM_CONTINUE;
}
result->push_back(new olc::GamePad{lpddi});
}
return DIENUM_CONTINUE;
};
while (true) {
for (DWORD i = 0; i < XUSER_MAX_COUNT; i++) {
XINPUT_STATE state;
DWORD dwResult = XInputGetState(i, &state);
if (dwResult == ERROR_SUCCESS) {
bool found = false;
for (auto &gamepad : gamepads) {
if (gamepad->getId() == std::to_string(i)) {
found = true;
if (!gamepad->stillConnected) {
gamepad->stillConnected = true;
}
break;
}
}
if (found) {
continue;
}
gamepads.push_back(new GamePad{i});
}
}
dev->EnumDevices(DI8DEVCLASS_GAMECTRL, enumFunction,
(LPVOID)&gamepads, DIEDFL_ALLDEVICES);
}
}};
deviceEnumThread.detach();
}
void olc::GamePad::updateGamepads() {
}
inline olc::GamePad::GamePad(LPCDIDEVICEINSTANCEA lpddi) {
name = lpddi->tszInstanceName;
dev->CreateDevice(lpddi->guidInstance, &thisDevice, NULL);
DIDEVCAPS caps;
caps.dwSize = sizeof(DIDEVCAPS);
thisDevice->GetCapabilities(&caps);
DIPROPDWORD bufferSize;
bufferSize.diph.dwHeaderSize = sizeof(DIPROPHEADER);
bufferSize.diph.dwSize = sizeof(DIPROPDWORD);
bufferSize.diph.dwHow = DIPH_DEVICE;
bufferSize.diph.dwObj = 0;
bufferSize.dwData = 128;
thisDevice->SetProperty(DIPROP_BUFFERSIZE, &bufferSize.diph);
ff = caps.dwFlags & DIDC_FORCEFEEDBACK;
thisDevice->SetDataFormat(&gamepad);
auto enumDOFunction = [](LPCDIDEVICEOBJECTINSTANCEA lpddoi, LPVOID pvRef) {
IDirectInputDevice8A *thisDevice;
std::vector<int> *axisPositions;
std::tie(thisDevice, axisPositions) = *reinterpret_cast<
std::tuple<IDirectInputDevice8A *, std::vector<int> *> *>(
pvRef);
// Axis
if (lpddoi->dwType & DIDFT_AXIS) {
DIPROPRANGE range;
range.diph.dwSize = sizeof(DIPROPRANGE);
range.diph.dwHeaderSize = sizeof(DIPROPHEADER);
range.diph.dwHow = DIPH_BYID;
range.diph.dwObj = lpddoi->dwType;
range.lMin = -1000;
range.lMax = 1000;
thisDevice->SetProperty(DIPROP_RANGE, &range.diph);
axisPositions->push_back((lpddoi->dwType >> 8) & 0xffff);
}
// Button
if (lpddoi->dwType & DIDFT_BUTTON) {
}
// POVhat
if (lpddoi->dwType & DIDFT_POV) {
}
return DIENUM_CONTINUE;
};
for (int i = 0; i < GP_BUTTON_COUNT; i++) {
availableButtons[i] = true;
}
for (int i = 0; i < GP_AXIS_COUNT; i++) {
availableAxes[i] = true;
}
auto input = std::make_tuple(thisDevice, &axisPositions);
thisDevice->EnumObjects(enumDOFunction, &input, DIDFT_ALL);
int min = 0x7fffffff;
for (auto p : axisPositions)
min = std::min(min, p);
for (auto &p : axisPositions)
p -= min;
for (int i = 0; i < GP_AXIS_COUNT; i++)
axes[i] = 0;
for (int i = 0; i < GP_BUTTON_COUNT; i++) {
buttons[i].bHeld = false;
buttons[i].bPressed = false;
buttons[i].bReleased = false;
}
if (ff) {
DIPERIODIC periodic;
periodic.dwMagnitude = DI_FFNOMINALMAX;
periodic.lOffset = 0;
periodic.dwPhase = 0;
periodic.dwPeriod = DWORD(0.05f * DI_SECONDS);
DIEFFECT eff;
eff.dwSize = sizeof(DIEFFECT);
eff.dwDuration = INFINITE;
eff.dwFlags = DIEFF_POLAR | DIEFF_OBJECTOFFSETS;
eff.dwSamplePeriod = 0;
eff.dwGain = DI_FFNOMINALMAX;
eff.cAxes = 2;
DWORD axes[] = {DIJOFS_X, DIJOFS_Y};
eff.rgdwAxes = axes;
LONG lDirection[2] = {0, 0};
eff.rglDirection = lDirection;
eff.cbTypeSpecificParams = sizeof(periodic);
eff.lpvTypeSpecificParams = &periodic;
thisDevice->CreateEffect(GUID_Sine, &eff, &effect, NULL);
if (effect) {
effect->Download();
effect->Stop();
} else {
ff = false;
}
}
thisDevice->Acquire();
}
inline olc::GamePad::GamePad(DWORD xId) : xId(xId), xInput(true) {
XINPUT_CAPABILITIES caps;
XInputGetCapabilities(xId, 0, &caps);
for (int i = 0; i < GP_BUTTON_COUNT; i++) {
availableButtons[i] = true;
}
for (int i = 0; i < GP_AXIS_COUNT; i++) {
availableAxes[i] = true;
}
name = "XInput Controller";
}
void olc::GamePad::poll() {
if (!stillConnected) {
return;
}
for (int i = 0; i < GP_BUTTON_COUNT; i++) {
buttons[i].bPressed = false;
buttons[i].bReleased = false;
}
if (!xInput) {
DIDEVICEOBJECTDATA data[128];
if (FAILED(thisDevice->Poll())) {
thisDevice->Acquire();
stillConnected = false;
return;
}
DWORD items = 128;
thisDevice->GetDeviceData(sizeof(DIDEVICEOBJECTDATA), data, &items, 0);
for (size_t i = 0; i < items; i++) {
// Button
if (data[i].dwOfs >= (DWORD)FIELD_OFFSET(GamePadState, buttons[0])
&& data[i].dwOfs
<= (DWORD)FIELD_OFFSET(GamePadState, buttons[19])) {
int id = data[i].dwOfs - FIELD_OFFSET(GamePadState, buttons[0]);
bool pressed = data[i].dwData & 0x80;
handleButton(id, pressed);
}
// POVhat
if (data[i].dwOfs == FIELD_OFFSET(GamePadState, povHat)) {
switch (data[i].dwData / DI_DEGREES / 45) {
case 0:
axes[6] = 0;
axes[7] = -1;
break;
case 1:
axes[6] = 1;
axes[7] = -1;
break;
case 2:
axes[6] = 1;
axes[7] = 0;
break;
case 3:
axes[6] = 1;
axes[7] = 1;
break;
case 4:
axes[6] = 0;
axes[7] = 1;
break;
case 5:
axes[6] = -1;
axes[7] = 1;
break;
case 6:
axes[6] = -1;
axes[7] = 0;
break;
case 7:
axes[6] = -1;
axes[7] = -1;
break;
default: axes[6] = 0; axes[7] = 0;
}
int x = int(axes[6]), y = int(axes[7]);
handleButton(14, x == -1);
handleButton(15, x == 1);
handleButton(16, y == -1);
handleButton(17, y == 1);
}
// Axis
if (data[i].dwOfs >= (DWORD)FIELD_OFFSET(GamePadState, axes[0])
&& data[i].dwOfs
<= (DWORD)FIELD_OFFSET(GamePadState, axes[5])) {
int id =
((data[i].dwOfs - offsetof(GamePadState, axes[0])) / 4);
int val = data[i].dwData;
axes[axisPositions[id]] = val / 1000.0f;
}
}
} else {
XINPUT_STATE state;
ZeroMemory(&state, sizeof(XINPUT_STATE));
int res = XInputGetState(xId, &state);
if (res == ERROR_DEVICE_NOT_CONNECTED) {
stillConnected = false;
return;
}
axes[2] = -state.Gamepad.sThumbRY / 32768.0f;
axes[5] = state.Gamepad.sThumbRX / 32768.0f;
axes[0] = -state.Gamepad.sThumbLY / 32768.0f;
axes[1] = state.Gamepad.sThumbLX / 32768.0f;
axes[4] = state.Gamepad.bLeftTrigger / 255.0f;
axes[3] = state.Gamepad.bRightTrigger / 255.0f;
bool u, d, l, r;
u = state.Gamepad.wButtons & XINPUT_GAMEPAD_DPAD_UP;
d = state.Gamepad.wButtons & XINPUT_GAMEPAD_DPAD_DOWN;
l = state.Gamepad.wButtons & XINPUT_GAMEPAD_DPAD_LEFT;
r = state.Gamepad.wButtons & XINPUT_GAMEPAD_DPAD_RIGHT;
axes[6] = float(r - l);
axes[7] = float(d - u);
WORD buttonCodes[]{
XINPUT_GAMEPAD_X,
XINPUT_GAMEPAD_A,
XINPUT_GAMEPAD_B,
XINPUT_GAMEPAD_Y,
XINPUT_GAMEPAD_LEFT_SHOULDER,
XINPUT_GAMEPAD_RIGHT_SHOULDER,
0,
0,
XINPUT_GAMEPAD_BACK,
XINPUT_GAMEPAD_START,
XINPUT_GAMEPAD_LEFT_THUMB,
XINPUT_GAMEPAD_RIGHT_THUMB,
0,
0,
XINPUT_GAMEPAD_DPAD_LEFT,
XINPUT_GAMEPAD_DPAD_RIGHT,
XINPUT_GAMEPAD_DPAD_UP,
XINPUT_GAMEPAD_DPAD_DOWN,
};
for (size_t i = 0; i < GP_BUTTON_COUNT; i++) {
bool pressed = state.Gamepad.wButtons & buttonCodes[i];
handleButton(i, pressed);
}
handleButton(6, axes[4] > 0.75f);
handleButton(7, axes[3] > 0.75f);
}
}
void olc::GamePad::startVibration(float strength) const {
if (xInput) {
if (strength < 0)
strength = 0;
if (strength > 1)
strength = 1;
XINPUT_VIBRATION vib;
ZeroMemory(&vib, sizeof(XINPUT_VIBRATION));
vib.wLeftMotorSpeed = short(65535 * strength);
vib.wRightMotorSpeed = short(65535 * strength);
XInputSetState(xId, &vib);
} else if (ff) {
DIEFFECT gainMod;
gainMod.dwGain = DWORD(DI_FFNOMINALMAX * strength);
effect->SetParameters(&gainMod, DIEP_GAIN);
effect->Download();
effect->Start(1, DIES_SOLO);
}
}
void olc::GamePad::stopVibration() const {
if (xInput)
startVibration(0);
else {
if (ff)
effect->Stop();
}
}
olc::GamePad::~GamePad() {
}
std::string olc::GamePad::getId() {
return xInput ? std::to_string(xId) : name;
}
#endif
#pragma endregion
#pragma region Linux
#ifdef __linux__
X11::Display *olc::GamePad::display{};
std::optional<int> olc::GamePad::inotifyFd = std::nullopt;
olc::GamePad *olc::GamePad::openGamepad(const std::string &path) {
// Parse the bit array from ioctl
auto getNthBit = [](const unsigned char *bits, int n) {
return (bits[n / 8] >> (n % 8)) & 1;
};
// Open the file, if can't, it's definitely not a device we can use
int fd = open(path.c_str(), O_RDWR | O_NONBLOCK);
if (fd < 0) {
close(fd);
return nullptr;
}
// Get the key events the device could send
unsigned char keyBits[KEY_CNT];
ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(keyBits)), keyBits);
// All gamepads *should* have BTN_GAMEPAD
if (!getNthBit(keyBits, BTN_GAMEPAD)) {
close(fd);
return nullptr;
}
return new olc::GamePad{path, fd};
}
// Create a gamepad from a path to the event file
olc::GamePad::GamePad(std::string path, int fd)
: path{std::move(path)},
availableAxes{false},
availableButtons{false},
effect{},
fd{fd} {
// Parse the bit array from ioctl
auto getNthBit = [](const unsigned char *bits, int n) {
return (bits[n / 8] >> (n % 8)) & 1;
};
// Query the deviceName of the device, if it has one
char deviceName[256] = "";
if (ioctl(fd, EVIOCGNAME(256), deviceName) > 0) {
this->name = deviceName;
} else {
this->name = "Undefined";
}
// Get the buttons the device reports
unsigned char keyBits[KEY_CNT];
ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(keyBits)), keyBits);
// Get the axes the device reports
unsigned char axisBits[ABS_CNT];
ioctl(fd, EVIOCGBIT(EV_ABS, sizeof(axisBits)), axisBits);
for (int i = 0; i < GP_BUTTON_COUNT; i++) {
availableButtons[i] = getNthBit(keyBits, buttonCodes[i]);
}
for (int i = 0; i < GP_AXIS_COUNT; i++) {
availableAxes[i] = getNthBit(axisBits, axisCodes[i]);
input_absinfo absinfo{};
ioctl(fd, EVIOCGABS(axisCodes[i]), &absinfo);
maxAbs.push_back(absinfo.maximum);
}
unsigned char features[1 + FF_MAX / 8] = {0};
ioctl(fd, EVIOCGBIT(EV_FF, sizeof(features)), features);
ff = getNthBit(features, FF_PERIODIC);
if (ff) {
memset(&effect, 0, sizeof(effect));
effect.u.periodic.waveform = FF_SINE;
effect.u.periodic.period = 100;
effect.u.periodic.magnitude = 0x7fff;
effect.u.periodic.offset = 0;
effect.u.periodic.phase = 0;
effect.u.periodic.envelope.attack_length = 0;
effect.u.periodic.envelope.attack_level = 0x7fff;
effect.u.periodic.envelope.fade_length = 0;
effect.u.periodic.envelope.fade_level = 0x7fff;
effect.replay.delay = 0;
effect.replay.length = 0xffff;
effect.type = FF_PERIODIC;
effect.id = -1;
effect.direction = 0;
if (ioctl(fd, EVIOCSFF, &effect) == -1) {
perror("Error:");
}
}
}
bool olc::GamePad::readEvent(input_event &event) const {
return read(fd, &event, sizeof(input_event)) == sizeof(input_event);
}
void olc::GamePad::poll() {
XResetScreenSaver(display);
struct stat filestat {};
fstat(fd, &filestat);
if (filestat.st_nlink == 0) {
stillConnected = false;
}
if (!stillConnected) {
return;
}
for (auto &button : buttons) {
button.bPressed = false;
button.bReleased = false;
}
input_event event{};
while (readEvent(event)) {
if (event.type == EV_KEY
&& ((event.code & BTN_GAMEPAD) == BTN_GAMEPAD
|| (event.code & BTN_DPAD_UP) == BTN_DPAD_UP)) {
for (int i = 0; i < GP_BUTTON_COUNT; i++) {
if (event.code == buttonCodes[i]) {
bool pressed = event.value;
handleButton(i, pressed);
if (i >= 14) {
if (i == 14)
axes[6] = -float(pressed);
if (i == 15)
axes[6] = float(pressed);
if (i == 16)
axes[7] = -float(pressed);
if (i == 17)
axes[7] = float(pressed);
}
if (i == 6)
axes[4] = float(pressed);
if (i == 7)
axes[3] = float(pressed);
}
}
}
if (event.type == EV_ABS) {
for (int i = 0; i < GP_AXIS_COUNT; i++) {
if (event.code == axisCodes[i]) {
float value = float(event.value) / maxAbs[i];
axes[i] = value;
if (i == 6) {
handleButton(14, event.value == -1);
handleButton(15, event.value == 1);
}
if (i == 7) {
handleButton(17, event.value == 1);
handleButton(16, event.value == -1);
}
if (i == 4)
handleButton(6, axes[4] >= 0.75f);
if (i == 3)
handleButton(7, axes[3] >= 0.75f);
}
}