# OpenVR SDK 1.14.15v1.14.15

New events:
* VREvent_DesktopViewUpdating
* VREvent_DesktopViewReady

IVRDriverDirectModeComponent:
* Updated CreateSwapTextureSet to (optionally) allow NTHandle support

IVRServerDriverHost:
  * Added SetDisplayProjectionRaw
  * Added SetRecommendedRenderTargetSize
  * Renamed TrackedDeviceDisplayTransformUpdated -> SetDisplayEyeToHead

[git-p4: depot-paths = "//vr/steamvr/sdk_release/": change = 6100641]

30 files changed, 86 insertions, 20 deletions

diff --git a/bin/linux32/libopenvr_api.so b/bin/linux32/libopenvr_api.so
index 33ed9c4..af4b2e1 100755
--- a/bin/linux32/libopenvr_api.so
+++ b/bin/linux32/libopenvr_api.so
diff --git a/bin/linux32/libopenvr_api.so.dbg b/bin/linux32/libopenvr_api.so.dbg
index 4a4ed69..d3341df 100755
--- a/bin/linux32/libopenvr_api.so.dbg
+++ b/bin/linux32/libopenvr_api.so.dbg
diff --git a/bin/linux64/libopenvr_api.so b/bin/linux64/libopenvr_api.so
index 8daaeb3..cfb9c13 100755
--- a/bin/linux64/libopenvr_api.so
+++ b/bin/linux64/libopenvr_api.so
diff --git a/bin/linux64/libopenvr_api.so.dbg b/bin/linux64/libopenvr_api.so.dbg
index 76929bc..7af8049 100755
--- a/bin/linux64/libopenvr_api.so.dbg
+++ b/bin/linux64/libopenvr_api.so.dbg
diff --git a/bin/linuxarm64/libopenvr_api.so b/bin/linuxarm64/libopenvr_api.so
index 2654e31..d291c97 100644
--- a/bin/linuxarm64/libopenvr_api.so
+++ b/bin/linuxarm64/libopenvr_api.so
diff --git a/bin/linuxarm64/libopenvr_api.so.dbg b/bin/linuxarm64/libopenvr_api.so.dbg
index 8952036..cf5d534 100644
--- a/bin/linuxarm64/libopenvr_api.so.dbg
+++ b/bin/linuxarm64/libopenvr_api.so.dbg
diff --git a/bin/linuxarm64/libopenvr_api_unity.so b/bin/linuxarm64/libopenvr_api_unity.so
index 1c12307..058260a 100644
--- a/bin/linuxarm64/libopenvr_api_unity.so
+++ b/bin/linuxarm64/libopenvr_api_unity.so
diff --git a/bin/linuxarm64/libopenvr_api_unity.so.dbg b/bin/linuxarm64/libopenvr_api_unity.so.dbg
index a9ddd6b..875cdb3 100644
--- a/bin/linuxarm64/libopenvr_api_unity.so.dbg
+++ b/bin/linuxarm64/libopenvr_api_unity.so.dbg
diff --git a/bin/win32/openvr_api.dll b/bin/win32/openvr_api.dll
index 8f1a376..2c79942 100644
--- a/bin/win32/openvr_api.dll
+++ b/bin/win32/openvr_api.dll
diff --git a/bin/win32/openvr_api.dll.sig b/bin/win32/openvr_api.dll.sig
index ff810fb..2c015a7 100644
--- a/bin/win32/openvr_api.dll.sig
+++ b/bin/win32/openvr_api.dll.sig
diff --git a/bin/win32/openvr_api.pdb b/bin/win32/openvr_api.pdb
index 95ecc70..356597c 100644
--- a/bin/win32/openvr_api.pdb
+++ b/bin/win32/openvr_api.pdb
diff --git a/bin/win64/openvr_api.dll b/bin/win64/openvr_api.dll
index ef336cb..e0113cd 100644
--- a/bin/win64/openvr_api.dll
+++ b/bin/win64/openvr_api.dll
diff --git a/bin/win64/openvr_api.dll.sig b/bin/win64/openvr_api.dll.sig
index 0c514e6..1f4c14f 100644
--- a/bin/win64/openvr_api.dll.sig
+++ b/bin/win64/openvr_api.dll.sig
diff --git a/bin/win64/openvr_api.pdb b/bin/win64/openvr_api.pdb
index 9bf3e4d..51e6a1c 100644
--- a/bin/win64/openvr_api.pdb
+++ b/bin/win64/openvr_api.pdb
diff --git a/headers/openvr.h b/headers/openvr.h
index 15c3822..5c03b28 100644
--- a/headers/openvr.h
+++ b/headers/openvr.h
@@ -15,8 +15,8 @@
 namespace vr
 {
 	static const uint32_t k_nSteamVRVersionMajor = 1;
-	static const uint32_t k_nSteamVRVersionMinor = 13;
-	static const uint32_t k_nSteamVRVersionBuild = 10;
+	static const uint32_t k_nSteamVRVersionMinor = 14;
+	static const uint32_t k_nSteamVRVersionBuild = 15;
 } // namespace vr
 
 // vrtypes.h
@@ -469,7 +469,8 @@ enum ETrackedDeviceProperty
 
 	Prop_Audio_DefaultPlaybackDeviceId_String		= 2300,
 	Prop_Audio_DefaultRecordingDeviceId_String		= 2301,
-	Prop_Audio_DefaultPlaybackDeviceVolume_Float	= 2302,
+	Prop_Audio_DefaultPlaybackDeviceVolume_Float = 2302,
+	Prop_Audio_SupportsDualSpeakerAndJackOutput_Bool = 2303,
 
 	// Properties that are unique to TrackedDeviceClass_Controller
 	Prop_AttachedDeviceId_String				= 3000,
@@ -784,6 +785,8 @@ enum EVREventType
 	VREvent_RoomViewHidden					= 527, // Sent by compositor whenever room-view is disabled
 	VREvent_ShowUI							= 528, // data is showUi
 	VREvent_ShowDevTools					= 529, // data is showDevTools
+	VREvent_DesktopViewUpdating				= 530,
+	VREvent_DesktopViewReady				= 531,
 
 	VREvent_Notification_Shown				= 600,
 	VREvent_Notification_Hidden				= 601,
@@ -2829,6 +2832,7 @@ namespace vr
 	static const char * const k_pch_audio_EnablePlaybackMirrorIndependentVolume_Bool = "enablePlaybackMirrorIndependentVolume";
 	static const char * const k_pch_audio_LastHmdPlaybackDeviceId_String = "lastHmdPlaybackDeviceId";
 	static const char * const k_pch_audio_VIVEHDMIGain = "viveHDMIGain";
+	static const char * const k_pch_audio_DualSpeakerAndJackOutput_Bool = "dualSpeakerAndJackOutput";
 
 	//-----------------------------------------------------------------------------
 	// power management keys
diff --git a/headers/openvr_api.cs b/headers/openvr_api.cs
index dbe789a..178724e 100644
--- a/headers/openvr_api.cs
+++ b/headers/openvr_api.cs
@@ -4719,6 +4719,7 @@ public enum ETrackedDeviceProperty
 	Prop_Audio_DefaultPlaybackDeviceId_String = 2300,
 	Prop_Audio_DefaultRecordingDeviceId_String = 2301,
 	Prop_Audio_DefaultPlaybackDeviceVolume_Float = 2302,
+	Prop_Audio_SupportsDualSpeakerAndJackOutput_Bool = 2303,
 	Prop_AttachedDeviceId_String = 3000,
 	Prop_SupportedButtons_Uint64 = 3001,
 	Prop_Axis0Type_Int32 = 3002,
@@ -4885,6 +4886,8 @@ public enum EVREventType
 	VREvent_RoomViewHidden = 527,
 	VREvent_ShowUI = 528,
 	VREvent_ShowDevTools = 529,
+	VREvent_DesktopViewUpdating = 530,
+	VREvent_DesktopViewReady = 531,
 	VREvent_Notification_Shown = 600,
 	VREvent_Notification_Hidden = 601,
 	VREvent_Notification_BeginInteraction = 602,
@@ -7699,6 +7702,7 @@ public class OpenVR
 	public const string k_pch_audio_EnablePlaybackMirrorIndependentVolume_Bool = "enablePlaybackMirrorIndependentVolume";
 	public const string k_pch_audio_LastHmdPlaybackDeviceId_String = "lastHmdPlaybackDeviceId";
 	public const string k_pch_audio_VIVEHDMIGain = "viveHDMIGain";
+	public const string k_pch_audio_DualSpeakerAndJackOutput_Bool = "dualSpeakerAndJackOutput";
 	public const string k_pch_Power_Section = "power";
 	public const string k_pch_Power_PowerOffOnExit_Bool = "powerOffOnExit";
 	public const string k_pch_Power_TurnOffScreensTimeout_Float = "turnOffScreensTimeout";
@@ -7773,6 +7777,7 @@ public class OpenVR
 	public const string k_pchPathBoundTrackerRole = "/bound_tracker_role";
 	public const string k_pchPathPoseRaw = "/pose/raw";
 	public const string k_pchPathPoseTip = "/pose/tip";
+	public const string k_pchPathPoseGrip = "/pose/grip";
 	public const string k_pchPathSystemButtonClick = "/input/system/click";
 	public const string k_pchPathProximity = "/proximity";
 	public const string k_pchPathControllerTypePrefix = "/controller_type/";
diff --git a/headers/openvr_api.json b/headers/openvr_api.json
index 179c4c3..1a38997 100644
--- a/headers/openvr_api.json
+++ b/headers/openvr_api.json
@@ -252,6 +252,7 @@
 	,{"name": "Prop_Audio_DefaultPlaybackDeviceId_String","value": "2300"}
 	,{"name": "Prop_Audio_DefaultRecordingDeviceId_String","value": "2301"}
 	,{"name": "Prop_Audio_DefaultPlaybackDeviceVolume_Float","value": "2302"}
+	,{"name": "Prop_Audio_SupportsDualSpeakerAndJackOutput_Bool","value": "2303"}
 	,{"name": "Prop_AttachedDeviceId_String","value": "3000"}
 	,{"name": "Prop_SupportedButtons_Uint64","value": "3001"}
 	,{"name": "Prop_Axis0Type_Int32","value": "3002"}
@@ -413,6 +414,8 @@
 	,{"name": "VREvent_RoomViewHidden","value": "527"}
 	,{"name": "VREvent_ShowUI","value": "528"}
 	,{"name": "VREvent_ShowDevTools","value": "529"}
+	,{"name": "VREvent_DesktopViewUpdating","value": "530"}
+	,{"name": "VREvent_DesktopViewReady","value": "531"}
 	,{"name": "VREvent_Notification_Shown","value": "600"}
 	,{"name": "VREvent_Notification_Hidden","value": "601"}
 	,{"name": "VREvent_Notification_BeginInteraction","value": "602"}
@@ -1699,6 +1702,8 @@
 ,{
 	"constname": "k_pch_audio_VIVEHDMIGain","consttype": "const char *const", "constval": "viveHDMIGain"}
 ,{
+	"constname": "k_pch_audio_DualSpeakerAndJackOutput_Bool","consttype": "const char *const", "constval": "dualSpeakerAndJackOutput"}
+,{
 	"constname": "k_pch_Power_Section","consttype": "const char *const", "constval": "power"}
 ,{
 	"constname": "k_pch_Power_PowerOffOnExit_Bool","consttype": "const char *const", "constval": "powerOffOnExit"}
@@ -1847,6 +1852,8 @@
 ,{
 	"constname": "k_pchPathPoseTip","consttype": "const char *", "constval": "/pose/tip"}
 ,{
+	"constname": "k_pchPathPoseGrip","consttype": "const char *", "constval": "/pose/grip"}
+,{
 	"constname": "k_pchPathSystemButtonClick","consttype": "const char *", "constval": "/input/system/click"}
 ,{
 	"constname": "k_pchPathProximity","consttype": "const char *", "constval": "/proximity"}
diff --git a/headers/openvr_capi.h b/headers/openvr_capi.h
index 7a7319e..4304f79 100644
--- a/headers/openvr_capi.h
+++ b/headers/openvr_capi.h
@@ -298,6 +298,7 @@ static const char * k_pch_audio_ActiveMirrorDevice_String = "activePlaybackMirro
 static const char * k_pch_audio_EnablePlaybackMirrorIndependentVolume_Bool = "enablePlaybackMirrorIndependentVolume";
 static const char * k_pch_audio_LastHmdPlaybackDeviceId_String = "lastHmdPlaybackDeviceId";
 static const char * k_pch_audio_VIVEHDMIGain = "viveHDMIGain";
+static const char * k_pch_audio_DualSpeakerAndJackOutput_Bool = "dualSpeakerAndJackOutput";
 static const char * k_pch_Power_Section = "power";
 static const char * k_pch_Power_PowerOffOnExit_Bool = "powerOffOnExit";
 static const char * k_pch_Power_TurnOffScreensTimeout_Float = "turnOffScreensTimeout";
@@ -372,6 +373,7 @@ static const char * k_pchPathBoundTrackerAliasPath = "/bound_tracker_path";
 static const char * k_pchPathBoundTrackerRole = "/bound_tracker_role";
 static const char * k_pchPathPoseRaw = "/pose/raw";
 static const char * k_pchPathPoseTip = "/pose/tip";
+static const char * k_pchPathPoseGrip = "/pose/grip";
 static const char * k_pchPathSystemButtonClick = "/input/system/click";
 static const char * k_pchPathProximity = "/proximity";
 static const char * k_pchPathControllerTypePrefix = "/controller_type/";
@@ -627,6 +629,7 @@ typedef enum ETrackedDeviceProperty
 	ETrackedDeviceProperty_Prop_Audio_DefaultPlaybackDeviceId_String = 2300,
 	ETrackedDeviceProperty_Prop_Audio_DefaultRecordingDeviceId_String = 2301,
 	ETrackedDeviceProperty_Prop_Audio_DefaultPlaybackDeviceVolume_Float = 2302,
+	ETrackedDeviceProperty_Prop_Audio_SupportsDualSpeakerAndJackOutput_Bool = 2303,
 	ETrackedDeviceProperty_Prop_AttachedDeviceId_String = 3000,
 	ETrackedDeviceProperty_Prop_SupportedButtons_Uint64 = 3001,
 	ETrackedDeviceProperty_Prop_Axis0Type_Int32 = 3002,
@@ -798,6 +801,8 @@ typedef enum EVREventType
 	EVREventType_VREvent_RoomViewHidden = 527,
 	EVREventType_VREvent_ShowUI = 528,
 	EVREventType_VREvent_ShowDevTools = 529,
+	EVREventType_VREvent_DesktopViewUpdating = 530,
+	EVREventType_VREvent_DesktopViewReady = 531,
 	EVREventType_VREvent_Notification_Shown = 600,
 	EVREventType_VREvent_Notification_Hidden = 601,
 	EVREventType_VREvent_Notification_BeginInteraction = 602,
diff --git a/headers/openvr_driver.h b/headers/openvr_driver.h
index 7402f7f..c75cc26 100644
--- a/headers/openvr_driver.h
+++ b/headers/openvr_driver.h
@@ -15,8 +15,8 @@
 namespace vr
 {
 	static const uint32_t k_nSteamVRVersionMajor = 1;
-	static const uint32_t k_nSteamVRVersionMinor = 13;
-	static const uint32_t k_nSteamVRVersionBuild = 10;
+	static const uint32_t k_nSteamVRVersionMinor = 14;
+	static const uint32_t k_nSteamVRVersionBuild = 15;
 } // namespace vr
 
 // vrtypes.h
@@ -469,7 +469,8 @@ enum ETrackedDeviceProperty
 
 	Prop_Audio_DefaultPlaybackDeviceId_String		= 2300,
 	Prop_Audio_DefaultRecordingDeviceId_String		= 2301,
-	Prop_Audio_DefaultPlaybackDeviceVolume_Float	= 2302,
+	Prop_Audio_DefaultPlaybackDeviceVolume_Float = 2302,
+	Prop_Audio_SupportsDualSpeakerAndJackOutput_Bool = 2303,
 
 	// Properties that are unique to TrackedDeviceClass_Controller
 	Prop_AttachedDeviceId_String				= 3000,
@@ -784,6 +785,8 @@ enum EVREventType
 	VREvent_RoomViewHidden					= 527, // Sent by compositor whenever room-view is disabled
 	VREvent_ShowUI							= 528, // data is showUi
 	VREvent_ShowDevTools					= 529, // data is showDevTools
+	VREvent_DesktopViewUpdating				= 530,
+	VREvent_DesktopViewReady				= 531,
 
 	VREvent_Notification_Shown				= 600,
 	VREvent_Notification_Hidden				= 601,
@@ -2422,6 +2425,7 @@ namespace vr
 	static const char * const k_pch_audio_EnablePlaybackMirrorIndependentVolume_Bool = "enablePlaybackMirrorIndependentVolume";
 	static const char * const k_pch_audio_LastHmdPlaybackDeviceId_String = "lastHmdPlaybackDeviceId";
 	static const char * const k_pch_audio_VIVEHDMIGain = "viveHDMIGain";
+	static const char * const k_pch_audio_DualSpeakerAndJackOutput_Bool = "dualSpeakerAndJackOutput";
 
 	//-----------------------------------------------------------------------------
 	// power management keys
@@ -2679,12 +2683,15 @@ namespace vr
 // ivrdriverdirectmodecomponent.h
 namespace vr
 {
-
+	enum VRSwapTextureFlag
+	{
+		// Specify that the shared texture resource was created with the SHARED_NTHANDLE option (Windows)
+		VRSwapTextureFlag_Shared_NTHandle = 1 << 0,
+	};
 
 	// ----------------------------------------------------------------------------------------------
 	// Purpose: This component is used for drivers that implement direct mode entirely on their own
-	//			without allowing the VR Compositor to own the window/device. Chances are you don't
-	//			need to implement this component in your driver.
+	//			without allowing the VR Compositor to own the window/device.
 	// ----------------------------------------------------------------------------------------------
 	class IVRDriverDirectModeComponent
 	{
@@ -2694,7 +2701,6 @@ namespace vr
 		// Direct mode methods
 		// -----------------------------------
 
-		/** Specific to Oculus compositor support, textures supplied must be created using this method. */
 		struct SwapTextureSetDesc_t
 		{
 			uint32_t nWidth;
@@ -2702,7 +2708,15 @@ namespace vr
 			uint32_t nFormat;
 			uint32_t nSampleCount;
 		};
-		virtual void CreateSwapTextureSet( uint32_t unPid, const SwapTextureSetDesc_t *pSwapTextureSetDesc, vr::SharedTextureHandle_t( *pSharedTextureHandles )[ 3 ] ) {}
+
+		struct SwapTextureSet_t
+		{
+			vr::SharedTextureHandle_t rSharedTextureHandles[ 3 ];
+			uint32_t unTextureFlags;
+		};
+
+		/** Called to allocate textures for applications to render into.  One of these per eye will be passed back to SubmitLayer each frame. */
+		virtual void CreateSwapTextureSet( uint32_t unPid, const SwapTextureSetDesc_t *pSwapTextureSetDesc, SwapTextureSet_t *pOutSwapTextureSet ) {}
 
 		/** Used to textures created using CreateSwapTextureSet.  Only one of the set's handles needs to be used to destroy the entire set. */
 		virtual void DestroySwapTextureSet( vr::SharedTextureHandle_t sharedTextureHandle ) {}
@@ -2741,7 +2755,7 @@ namespace vr
 		virtual void GetFrameTiming( DriverDirectMode_FrameTiming *pFrameTiming ) {}
 	};
 
-	static const char *IVRDriverDirectModeComponent_Version = "IVRDriverDirectModeComponent_006";
+	static const char *IVRDriverDirectModeComponent_Version = "IVRDriverDirectModeComponent_007";
 
 }
 
@@ -3452,18 +3466,27 @@ public:
 	* other properties can be looked up via IVRProperties. */
 	virtual void GetRawTrackedDevicePoses( float fPredictedSecondsFromNow, TrackedDevicePose_t *pTrackedDevicePoseArray, uint32_t unTrackedDevicePoseArrayCount ) = 0;
 
-	/** Notifies the server that a tracked device's display component transforms have been updated. */
-	virtual void TrackedDeviceDisplayTransformUpdated( uint32_t unWhichDevice, HmdMatrix34_t eyeToHeadLeft, HmdMatrix34_t eyeToHeadRight ) = 0;
-
 	/** Requests that SteamVR be restarted. The provided reason will be displayed to the user and should be in the current locale. */
 	virtual void RequestRestart( const char *pchLocalizedReason, const char *pchExecutableToStart, const char *pchArguments, const char *pchWorkingDirectory ) = 0;
 
 	/** Interface for copying a range of timing data.  Frames are returned in ascending order (oldest to newest) with the last being the most recent frame.
 	* Only the first entry's m_nSize needs to be set, as the rest will be inferred from that.  Returns total number of entries filled out. */
 	virtual uint32_t GetFrameTimings( Compositor_FrameTiming *pTiming, uint32_t nFrames ) = 0;
+
+	/** Notifies the server that a tracked device's display component transforms have been updated.
+	* only permitted on devices of the HMD class. */
+	virtual void SetDisplayEyeToHead( uint32_t unWhichDevice, const HmdMatrix34_t & eyeToHeadLeft, const HmdMatrix34_t & eyeToHeadRight ) = 0;
+
+	/** Notifies the server that a tracked device's display projection has changed.
+	* only permitted on devices of the HMD class. */
+	virtual void SetDisplayProjectionRaw( uint32_t unWhichDevice, const HmdRect2_t & eyeLeft, const HmdRect2_t & eyeRight ) = 0;
+
+	/** Notifies the server that a tracked device's recommended render target resolution has changed.
+	* only permitted on devices of the HMD class. */
+	virtual void SetRecommendedRenderTargetSize( uint32_t unWhichDevice, uint32_t nWidth, uint32_t nHeight ) = 0;
 };
 
-static const char *IVRServerDriverHost_Version = "IVRServerDriverHost_005";
+static const char *IVRServerDriverHost_Version = "IVRServerDriverHost_006";
 
 }
 
diff --git a/lib/linux32/libopenvr_api.so b/lib/linux32/libopenvr_api.so
index 5be5a63..fc6a65e 100755
--- a/lib/linux32/libopenvr_api.so
+++ b/lib/linux32/libopenvr_api.so
diff --git a/lib/linux64/libopenvr_api.so b/lib/linux64/libopenvr_api.so
index 76929bc..e3bf34d 100755
--- a/lib/linux64/libopenvr_api.so
+++ b/lib/linux64/libopenvr_api.so
diff --git a/lib/linuxarm64/libopenvr_api.so b/lib/linuxarm64/libopenvr_api.so
index 8952036..cf5d534 100644
--- a/lib/linuxarm64/libopenvr_api.so
+++ b/lib/linuxarm64/libopenvr_api.so
diff --git a/lib/linuxarm64/libopenvr_api_unity.so b/lib/linuxarm64/libopenvr_api_unity.so
index a9ddd6b..875cdb3 100644
--- a/lib/linuxarm64/libopenvr_api_unity.so
+++ b/lib/linuxarm64/libopenvr_api_unity.so
diff --git a/samples/bin/linux32/libopenvr_api.so b/samples/bin/linux32/libopenvr_api.so
index 33ed9c4..af4b2e1 100644
--- a/samples/bin/linux32/libopenvr_api.so
+++ b/samples/bin/linux32/libopenvr_api.so
diff --git a/samples/bin/linux64/libopenvr_api.so b/samples/bin/linux64/libopenvr_api.so
index 8daaeb3..cfb9c13 100644
--- a/samples/bin/linux64/libopenvr_api.so
+++ b/samples/bin/linux64/libopenvr_api.so
diff --git a/samples/bin/linuxarm64/libopenvr_api.so b/samples/bin/linuxarm64/libopenvr_api.so
index 2654e31..d291c97 100644
--- a/samples/bin/linuxarm64/libopenvr_api.so
+++ b/samples/bin/linuxarm64/libopenvr_api.so
diff --git a/samples/bin/win32/openvr_api.dll b/samples/bin/win32/openvr_api.dll
index 8f1a376..2c79942 100644
--- a/samples/bin/win32/openvr_api.dll
+++ b/samples/bin/win32/openvr_api.dll
diff --git a/samples/bin/win64/openvr_api.dll b/samples/bin/win64/openvr_api.dll
index ef336cb..e0113cd 100644
--- a/samples/bin/win64/openvr_api.dll
+++ b/samples/bin/win64/openvr_api.dll
diff --git a/src/vrcommon/sharedlibtools_public.cpp b/src/vrcommon/sharedlibtools_public.cpp
index 048512a..f2cf57f 100644
--- a/src/vrcommon/sharedlibtools_public.cpp
+++ b/src/vrcommon/sharedlibtools_public.cpp
@@ -10,13 +10,33 @@
 #include <dlfcn.h>
 #endif
 
-SharedLibHandle SharedLib_Load( const char *pchPath )
+
+SharedLibHandle SharedLib_Load( const char *pchPath, uint32_t *pErrorCode )
 {
+	SharedLibHandle pHandle = nullptr;
+#if defined( _WIN32)
+	pHandle = ( SharedLibHandle )LoadLibraryEx( pchPath, NULL, LOAD_WITH_ALTERED_SEARCH_PATH );
+#elif defined(POSIX)
+	pHandle = (SharedLibHandle) dlopen(pchPath, RTLD_LOCAL|RTLD_NOW);
+#endif
+
+	if ( pErrorCode )
+	{
+		if ( pHandle == nullptr )
+		{
 #if defined( _WIN32)
-	return (SharedLibHandle)LoadLibraryEx( pchPath, NULL, LOAD_WITH_ALTERED_SEARCH_PATH );
+			*pErrorCode = ( uint32_t ) GetLastError();
 #elif defined(POSIX)
-	return (SharedLibHandle)dlopen(pchPath, RTLD_LOCAL|RTLD_NOW);
+			*pErrorCode = 1;
 #endif
+		}
+		else
+		{
+			*pErrorCode = 0;
+		}
+	}
+
+	return pHandle;
 }
 
 void *SharedLib_GetFunction( SharedLibHandle lib, const char *pchFunctionName)
diff --git a/src/vrcommon/sharedlibtools_public.h b/src/vrcommon/sharedlibtools_public.h
index 10163db..38e7c29 100644
--- a/src/vrcommon/sharedlibtools_public.h
+++ b/src/vrcommon/sharedlibtools_public.h
@@ -1,9 +1,11 @@
 //========= Copyright Valve Corporation ============//
 #pragma once
 
+#include <stdint.h>
+
 typedef void *SharedLibHandle;
 
-SharedLibHandle SharedLib_Load( const char *pchPath );
+SharedLibHandle SharedLib_Load( const char *pchPath, uint32_t *pErrorCode = nullptr );
 void *SharedLib_GetFunction( SharedLibHandle lib, const char *pchFunctionName);
 void SharedLib_Unload( SharedLibHandle lib );