From fa0f1e5a57051888c25ccb2ba2202e29b3c4e48e Mon Sep 17 00:00:00 2001
From: Chuck Walbourn <chuckw@microsoft.com>
Date: Thu, 5 Dec 2024 23:08:42 -0800
Subject: [PATCH] Remove support for XInput 9.1.0

---
 Inc/GamePad.h   |  4 ---
 Src/GamePad.cpp | 82 ++-----------------------------------------------
 2 files changed, 2 insertions(+), 84 deletions(-)

diff --git a/Inc/GamePad.h b/Inc/GamePad.h
index 24a8770b..8d3158f8 100644
--- a/Inc/GamePad.h
+++ b/Inc/GamePad.h
@@ -43,11 +43,7 @@
 
 #elif defined(USING_XINPUT)
 #ifdef _MSC_VER
-#if (_WIN32_WINNT >= 0x0602 /*_WIN32_WINNT_WIN8*/ )
 #pragma comment(lib,"xinput.lib")
-#else
-#pragma comment(lib,"xinput9_1_0.lib")
-#endif
 #endif
 #endif
 
diff --git a/Src/GamePad.cpp b/Src/GamePad.cpp
index 302a6bd3..0259d8c5 100644
--- a/Src/GamePad.cpp
+++ b/Src/GamePad.cpp
@@ -1286,11 +1286,6 @@ class GamePad::Impl
         mOwner(owner),
         mConnected{},
         mLastReadTime{}
-    #if (_WIN32_WINNT < _WIN32_WINNT_WIN8)
-        , mLeftMotor{}
-        , mRightMotor{}
-        , mSuspended(false)
-    #endif
     {
         for (int j = 0; j < XUSER_MAX_COUNT; ++j)
         {
@@ -1319,15 +1314,6 @@ class GamePad::Impl
 
         if (!ThrottleRetry(player, time))
         {
-        #if (_WIN32_WINNT < _WIN32_WINNT_WIN8)
-            if (mSuspended)
-            {
-                memset(&state, 0, sizeof(State));
-                state.connected = mConnected[player];
-                return;
-            }
-        #endif
-
             XINPUT_STATE xstate;
             const DWORD result = XInputGetState(DWORD(player), &xstate);
             if (result == ERROR_DEVICE_NOT_CONNECTED)
@@ -1414,7 +1400,6 @@ class GamePad::Impl
                 if (xcaps.Type == XINPUT_DEVTYPE_GAMEPAD)
                 {
                     static_assert(Capabilities::GAMEPAD == XINPUT_DEVSUBTYPE_GAMEPAD, "xinput.h mismatch");
-                #if (_WIN32_WINNT >= _WIN32_WINNT_WIN8)
                     static_assert(XINPUT_DEVSUBTYPE_WHEEL == Capabilities::WHEEL, "xinput.h mismatch");
                     static_assert(XINPUT_DEVSUBTYPE_ARCADE_STICK == Capabilities::ARCADE_STICK, "xinput.h mismatch");
                 #ifndef __MINGW32__
@@ -1426,19 +1411,13 @@ class GamePad::Impl
                     static_assert(XINPUT_DEVSUBTYPE_DRUM_KIT == Capabilities::DRUM_KIT, "xinput.h mismatch");
                     static_assert(XINPUT_DEVSUBTYPE_GUITAR_BASS == Capabilities::GUITAR_BASS, "xinput.h mismatch");
                     static_assert(XINPUT_DEVSUBTYPE_ARCADE_PAD == Capabilities::ARCADE_PAD, "xinput.h mismatch");
-                #endif
 
                     caps.gamepadType = Capabilities::Type(xcaps.SubType);
                 }
 
                 // Hard-coded VID/PID
                 caps.vid = 0x045E;
-            #if (_WIN32_WINNT >= _WIN32_WINNT_WIN8)
                 caps.pid = (xcaps.Flags & XINPUT_CAPS_WIRELESS) ? 0x0719 : 0;
-            #else
-                caps.pid = 0;
-            #endif
-
                 return;
             }
         }
@@ -1463,14 +1442,6 @@ class GamePad::Impl
         UNREFERENCED_PARAMETER(leftTrigger);
         UNREFERENCED_PARAMETER(rightTrigger);
 
-    #if (_WIN32_WINNT < _WIN32_WINNT_WIN8)
-        mLeftMotor[player] = leftMotor;
-        mRightMotor[player] = rightMotor;
-
-        if (mSuspended)
-            return mConnected[player];
-    #endif
-
         XINPUT_VIBRATION xvibration;
         xvibration.wLeftMotorSpeed = WORD(leftMotor * 0xFFFF);
         xvibration.wRightMotorSpeed = WORD(rightMotor * 0xFFFF);
@@ -1494,24 +1465,8 @@ class GamePad::Impl
     {
     #if (_WIN32_WINNT >= _WIN32_WINNT_WIN10)
         // XInput focus is handled automatically on Windows 10
-    #elif (_WIN32_WINNT >= _WIN32_WINNT_WIN8)
-        XInputEnable(FALSE);
     #else
-        // For XInput 9.1.0, we have to emulate the behavior of XInputEnable( FALSE )
-        if (!mSuspended)
-        {
-            for (size_t j = 0; j < XUSER_MAX_COUNT; ++j)
-            {
-                if (mConnected[j])
-                {
-                    XINPUT_VIBRATION xvibration;
-                    xvibration.wLeftMotorSpeed = xvibration.wRightMotorSpeed = 0;
-                    std::ignore = XInputSetState(DWORD(j), &xvibration);
-                }
-            }
-
-            mSuspended = true;
-        }
+        XInputEnable(FALSE);
     #endif
     }
 
@@ -1519,31 +1474,8 @@ class GamePad::Impl
     {
     #if (_WIN32_WINNT >= _WIN32_WINNT_WIN10)
         // XInput focus is handled automatically on Windows 10
-    #elif (_WIN32_WINNT >= _WIN32_WINNT_WIN8)
-        XInputEnable(TRUE);
     #else
-        // For XInput 9.1.0, we have to emulate the behavior of XInputEnable( TRUE )
-        if (mSuspended)
-        {
-            const ULONGLONG time = GetTickCount64();
-
-            for (int j = 0; j < XUSER_MAX_COUNT; ++j)
-            {
-                if (mConnected[j])
-                {
-                    XINPUT_VIBRATION xvibration;
-                    xvibration.wLeftMotorSpeed = WORD(mLeftMotor[j] * 0xFFFF);
-                    xvibration.wRightMotorSpeed = WORD(mRightMotor[j] * 0xFFFF);
-                    const DWORD result = XInputSetState(DWORD(j), &xvibration);
-                    if (result == ERROR_DEVICE_NOT_CONNECTED)
-                    {
-                        ClearSlot(j, time);
-                    }
-                }
-            }
-
-            mSuspended = false;
-        }
+        XInputEnable(TRUE);
     #endif
     }
 
@@ -1555,13 +1487,6 @@ class GamePad::Impl
     bool        mConnected[XUSER_MAX_COUNT];
     ULONGLONG   mLastReadTime[XUSER_MAX_COUNT];
 
-#if (_WIN32_WINNT < _WIN32_WINNT_WIN8)
-    // Variables for emulating XInputEnable on XInput 9.1.0
-    float       mLeftMotor[XUSER_MAX_COUNT];
-    float       mRightMotor[XUSER_MAX_COUNT];
-    bool        mSuspended;
-#endif
-
     bool ThrottleRetry(int player, ULONGLONG time)
     {
         // This function minimizes a potential performance issue with XInput on Windows when
@@ -1596,9 +1521,6 @@ class GamePad::Impl
     {
         mConnected[player] = false;
         mLastReadTime[player] = time;
-    #if (_WIN32_WINNT < _WIN32_WINNT_WIN8)
-        mLeftMotor[player] = mRightMotor[player] = 0.f;
-    #endif
     }
 
     int GetMostRecent()