1 files changed, 101 insertions, 0 deletions
diff --git a/Samples/CommonSrc/Platform/Win32_Gamepad.cpp b/Samples/CommonSrc/Platform/Win32_Gamepad.cpp
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+++ b/Samples/CommonSrc/Platform/Win32_Gamepad.cpp
@@ -0,0 +1,101 @@
+/************************************************************************************
+
+Filename    :   Win32_Gamepad.cpp
+Content     :   Win32 implementation of Platform app infrastructure
+Created     :   May 6, 2013
+Authors     :   Lee Cooper
+
+Copyright   :   Copyright 2013 Oculus VR, Inc. All Rights reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+************************************************************************************/
+
+#include "Win32_Gamepad.h"
+
+namespace OVR { namespace Platform { namespace Win32 {
+
+GamepadManager::GamepadManager()
+{
+    hXInputModule = ::LoadLibraryA("Xinput9_1_0.dll");
+    if (hXInputModule)
+    {
+        pXInputGetState = (PFn_XInputGetState)
+            ::GetProcAddress(hXInputModule, "XInputGetState");        
+    }
+}
+
+GamepadManager::~GamepadManager()
+{
+    if (hXInputModule)
+        ::FreeLibrary(hXInputModule);
+}
+
+static inline float GamepadStick(short in)
+{
+    float v;
+    if (abs(in) < 9000)
+        return 0;
+    else if (in > 9000)
+        v = (float) in - 9000;
+    else
+        v = (float) in + 9000;
+    return v / (32767 - 9000);
+}
+
+static inline float GamepadTrigger(BYTE in)
+{
+    if (in < 30)
+        return 0;
+    else
+        return float(in-30) / 225;
+}
+
+UInt32 GamepadManager::GetGamepadCount()
+{
+    return 1;
+}
+
+bool GamepadManager::GetGamepadState(UInt32 index, GamepadState* pState)
+{
+    // For now we just support one gamepad.
+    OVR_UNUSED(index);
+
+    if (pXInputGetState)
+    {
+        XINPUT_STATE xis;
+                
+        if (pXInputGetState(0, &xis))
+            return false;
+
+        if (xis.dwPacketNumber == LastPadPacketNo)
+            return false;
+
+        // State changed.
+        pState->Buttons = xis.Gamepad.wButtons; // Currently matches Xinput
+        pState->LT = GamepadTrigger(xis.Gamepad.bLeftTrigger);
+        pState->RT = GamepadTrigger(xis.Gamepad.bRightTrigger);
+        pState->LX = GamepadStick(xis.Gamepad.sThumbLX);
+        pState->LY = GamepadStick(xis.Gamepad.sThumbLY);
+        pState->RX = GamepadStick(xis.Gamepad.sThumbRX);
+        pState->RY = GamepadStick(xis.Gamepad.sThumbRY);
+
+        LastPadPacketNo = xis.dwPacketNumber;
+
+        return true;
+    }
+
+    return false;
+}
+
+}}} // OVR::Platform::Win32