commit 8651d65a0d67b061a8bf209235d2634a34056e36
Author: CrispyPin <crispin@tasa.se>
Date:   Sun Apr 2 14:34:52 2023 +0200

    init - display part of screen on a vr overlay

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..08047cf
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+overlay
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..7630d09
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,8 @@
+
+
+build:
+	CPATH=. g++ -lX11 -lglfw -lGL openvr/libopenvr_api.so src/main.cpp -o overlay
+
+run: build
+	./overlay
+
diff --git a/openvr/libopenvr_api.so b/openvr/libopenvr_api.so
new file mode 100644
index 0000000..dff2dfa
Binary files /dev/null and b/openvr/libopenvr_api.so differ
diff --git a/openvr/openvr.h b/openvr/openvr.h
new file mode 100644
index 0000000..6bce35b
--- /dev/null
+++ b/openvr/openvr.h
@@ -0,0 +1,5600 @@
+#pragma once
+
+// openvr.h
+//========= Copyright Valve Corporation ============//
+// Dynamically generated file. Do not modify this file directly.
+
+#ifndef _OPENVR_API
+#define _OPENVR_API
+
+#include <stdint.h>
+
+// version.h
+
+namespace vr
+{
+	static const uint32_t k_nSteamVRVersionMajor = 1;
+	static const uint32_t k_nSteamVRVersionMinor = 23;
+	static const uint32_t k_nSteamVRVersionBuild = 7;
+} // namespace vr
+
+// public_vrtypes.h
+
+#ifndef _INCLUDE_CORE_VRTYPES_PUBLIC_H
+#define _INCLUDE_CORE_VRTYPES_PUBLIC_H
+
+namespace vr
+{
+#pragma pack(push, 8)
+
+	typedef uint32_t PropertyTypeTag_t;
+
+	// right-handed system
+	// +y is up
+	// +x is to the right
+	// -z is forward
+	// Distance unit is  meters
+	struct HmdMatrix34_t
+	{
+		float m[3][4];
+	};
+
+	struct HmdMatrix33_t
+	{
+		float m[3][3];
+	};
+
+	struct HmdMatrix44_t
+	{
+		float m[4][4];
+	};
+
+	struct HmdVector3_t
+	{
+		float v[3];
+	};
+
+	struct HmdVector4_t
+	{
+		float v[4];
+	};
+
+	struct HmdVector3d_t
+	{
+		double v[3];
+	};
+
+	struct HmdVector2_t
+	{
+		float v[2];
+	};
+
+	struct HmdQuaternion_t
+	{
+		double w, x, y, z;
+	};
+
+	struct HmdQuaternionf_t
+	{
+		float w, x, y, z;
+	};
+
+	struct HmdColor_t
+	{
+		float r, g, b, a;
+	};
+
+	struct HmdQuad_t
+	{
+		HmdVector3_t vCorners[4];
+	};
+
+	struct HmdRect2_t
+	{
+		HmdVector2_t vTopLeft;
+		HmdVector2_t vBottomRight;
+	};
+
+	/** Holds the transform for a single bone */
+	struct VRBoneTransform_t
+	{
+		HmdVector4_t position;
+		HmdQuaternionf_t orientation;
+	};
+
+#pragma pack(pop)
+
+} // namespace vr
+
+#endif
+
+// vrtypes.h
+
+#ifndef _INCLUDE_VRTYPES_H
+#define _INCLUDE_VRTYPES_H
+
+// Forward declarations to avoid requiring vulkan.h
+struct VkDevice_T;
+struct VkPhysicalDevice_T;
+struct VkInstance_T;
+struct VkQueue_T;
+
+// Forward declarations to avoid requiring d3d12.h
+struct ID3D12Resource;
+struct ID3D12CommandQueue;
+
+namespace vr
+{
+#pragma pack(push, 8)
+
+	/** A handle for a spatial anchor.  This handle is only valid during the session it was created in.
+	 * Anchors that live beyond one session should be saved by their string descriptors. */
+	typedef uint32_t SpatialAnchorHandle_t;
+
+	typedef void *glSharedTextureHandle_t;
+	typedef int32_t glInt_t;
+	typedef uint32_t glUInt_t;
+
+	/** Used to return the post-distortion UVs for each color channel.
+	 * UVs range from 0 to 1 with 0,0 in the upper left corner of the
+	 * source render target. The 0,0 to 1,1 range covers a single eye. */
+	struct DistortionCoordinates_t
+	{
+		float rfRed[2];
+		float rfGreen[2];
+		float rfBlue[2];
+	};
+
+	enum EVREye
+	{
+		Eye_Left = 0,
+		Eye_Right = 1
+	};
+
+	enum ETextureType
+	{
+		TextureType_Invalid = -1,		  // Handle has been invalidated
+		TextureType_DirectX = 0,		  // Handle is an ID3D11Texture
+		TextureType_OpenGL = 1,			  // Handle is an OpenGL texture name or an OpenGL render buffer name, depending on submit flags
+		TextureType_Vulkan = 2,			  // Handle is a pointer to a VRVulkanTextureData_t structure
+		TextureType_IOSurface = 3,		  // Handle is a macOS cross-process-sharable IOSurfaceRef, deprecated in favor of TextureType_Metal on supported platforms
+		TextureType_DirectX12 = 4,		  // Handle is a pointer to a D3D12TextureData_t structure
+		TextureType_DXGISharedHandle = 5, // Handle is a HANDLE DXGI share handle, only supported for Overlay render targets.
+										  // this texture is used directly by our renderer, so only perform atomic (copyresource or resolve) on it
+		TextureType_Metal = 6,			  // Handle is a MTLTexture conforming to the MTLSharedTexture protocol. Textures submitted to IVRCompositor::Submit which
+										  // are of type MTLTextureType2DArray assume layer 0 is the left eye texture (vr::EVREye::Eye_left), layer 1 is the right
+										  // eye texture (vr::EVREye::Eye_Right)
+	};
+
+	enum EColorSpace
+	{
+		ColorSpace_Auto = 0,   // Assumes 'gamma' for 8-bit per component formats, otherwise 'linear'.  This mirrors the DXGI formats which have _SRGB variants.
+		ColorSpace_Gamma = 1,  // Texture data can be displayed directly on the display without any conversion (a.k.a. display native format).
+		ColorSpace_Linear = 2, // Same as gamma but has been converted to a linear representation using DXGI's sRGB conversion algorithm.
+	};
+
+	struct Texture_t
+	{
+		void *handle; // See ETextureType definition above
+		ETextureType eType;
+		EColorSpace eColorSpace;
+	};
+
+	// Handle to a shared texture (HANDLE on Windows obtained using OpenSharedResource).
+	typedef uint64_t SharedTextureHandle_t;
+#define INVALID_SHARED_TEXTURE_HANDLE ((vr::SharedTextureHandle_t)0)
+
+	enum ETrackingResult
+	{
+		TrackingResult_Uninitialized = 1,
+
+		TrackingResult_Calibrating_InProgress = 100,
+		TrackingResult_Calibrating_OutOfRange = 101,
+
+		TrackingResult_Running_OK = 200,
+		TrackingResult_Running_OutOfRange = 201,
+
+		TrackingResult_Fallback_RotationOnly = 300,
+	};
+
+	typedef uint32_t DriverId_t;
+	static const uint32_t k_nDriverNone = 0xFFFFFFFF;
+
+	static const uint32_t k_unMaxDriverDebugResponseSize = 32768;
+
+	/** Used to pass device IDs to API calls */
+	typedef uint32_t TrackedDeviceIndex_t;
+	static const uint32_t k_unTrackedDeviceIndex_Hmd = 0;
+	static const uint32_t k_unMaxTrackedDeviceCount = 64;
+	static const uint32_t k_unTrackedDeviceIndexOther = 0xFFFFFFFE;
+	static const uint32_t k_unTrackedDeviceIndexInvalid = 0xFFFFFFFF;
+
+	/** Describes what kind of object is being tracked at a given ID */
+	enum ETrackedDeviceClass
+	{
+		TrackedDeviceClass_Invalid = 0,			  // the ID was not valid.
+		TrackedDeviceClass_HMD = 1,				  // Head-Mounted Displays
+		TrackedDeviceClass_Controller = 2,		  // Tracked controllers
+		TrackedDeviceClass_GenericTracker = 3,	  // Generic trackers, similar to controllers
+		TrackedDeviceClass_TrackingReference = 4, // Camera and base stations that serve as tracking reference points
+		TrackedDeviceClass_DisplayRedirect = 5,	  // Accessories that aren't necessarily tracked themselves, but may redirect video output from other tracked devices
+
+		TrackedDeviceClass_Max
+	};
+
+	/** Describes what specific role associated with a tracked device */
+	enum ETrackedControllerRole
+	{
+		TrackedControllerRole_Invalid = 0,	 // Invalid value for controller type
+		TrackedControllerRole_LeftHand = 1,	 // Tracked device associated with the left hand
+		TrackedControllerRole_RightHand = 2, // Tracked device associated with the right hand
+		TrackedControllerRole_OptOut = 3,	 // Tracked device is opting out of left/right hand selection
+		TrackedControllerRole_Treadmill = 4, // Tracked device is a treadmill or other locomotion device
+		TrackedControllerRole_Stylus = 5,	 // Tracked device is a stylus
+		TrackedControllerRole_Max = 5
+	};
+
+	/** Returns true if the tracked controller role is allowed to be a hand */
+	inline bool IsRoleAllowedAsHand(ETrackedControllerRole eRole)
+	{
+		switch (eRole)
+		{
+		case TrackedControllerRole_Invalid:
+		case TrackedControllerRole_LeftHand:
+		case TrackedControllerRole_RightHand:
+			return true;
+		default:
+			return false;
+		}
+	}
+
+	/** describes a single pose for a tracked object */
+	struct TrackedDevicePose_t
+	{
+		HmdMatrix34_t mDeviceToAbsoluteTracking;
+		HmdVector3_t vVelocity;		   // velocity in tracker space in m/s
+		HmdVector3_t vAngularVelocity; // angular velocity in radians/s (?)
+		ETrackingResult eTrackingResult;
+		bool bPoseIsValid;
+
+		// This indicates that there is a device connected for this spot in the pose array.
+		// It could go from true to false if the user unplugs the device.
+		bool bDeviceIsConnected;
+	};
+
+	/** Identifies which style of tracking origin the application wants to use
+	 * for the poses it is requesting */
+	enum ETrackingUniverseOrigin
+	{
+		TrackingUniverseSeated = 0,				// Poses are provided relative to the seated zero pose
+		TrackingUniverseStanding = 1,			// Poses are provided relative to the safe bounds configured by the user
+		TrackingUniverseRawAndUncalibrated = 2, // Poses are provided in the coordinate system defined by the driver.  It has Y up and is unified for devices of the same driver. You usually don't want this one.
+	};
+
+	enum EAdditionalRadioFeatures
+	{
+		AdditionalRadioFeatures_None = 0x00000000,
+		AdditionalRadioFeatures_HTCLinkBox = 0x00000001,
+		AdditionalRadioFeatures_InternalDongle = 0x00000002,
+		AdditionalRadioFeatures_ExternalDongle = 0x00000004,
+	};
+
+	typedef uint64_t WebConsoleHandle_t;
+#define INVALID_WEB_CONSOLE_HANDLE ((vr::WebConsoleHandle_t)0)
+
+	// Refers to a single container of properties
+	typedef uint64_t PropertyContainerHandle_t;
+	typedef uint32_t PropertyTypeTag_t;
+
+	static const PropertyContainerHandle_t k_ulInvalidPropertyContainer = 0;
+	static const PropertyTypeTag_t k_unInvalidPropertyTag = 0;
+
+	typedef PropertyContainerHandle_t DriverHandle_t;
+	static const PropertyContainerHandle_t k_ulInvalidDriverHandle = 0;
+
+	// Use these tags to set/get common types as struct properties
+	static const PropertyTypeTag_t k_unFloatPropertyTag = 1;
+	static const PropertyTypeTag_t k_unInt32PropertyTag = 2;
+	static const PropertyTypeTag_t k_unUint64PropertyTag = 3;
+	static const PropertyTypeTag_t k_unBoolPropertyTag = 4;
+	static const PropertyTypeTag_t k_unStringPropertyTag = 5;
+	static const PropertyTypeTag_t k_unErrorPropertyTag = 6;
+	static const PropertyTypeTag_t k_unDoublePropertyTag = 7;
+
+	static const PropertyTypeTag_t k_unHmdMatrix34PropertyTag = 20;
+	static const PropertyTypeTag_t k_unHmdMatrix44PropertyTag = 21;
+	static const PropertyTypeTag_t k_unHmdVector3PropertyTag = 22;
+	static const PropertyTypeTag_t k_unHmdVector4PropertyTag = 23;
+	static const PropertyTypeTag_t k_unHmdVector2PropertyTag = 24;
+	static const PropertyTypeTag_t k_unHmdQuadPropertyTag = 25;
+
+	static const PropertyTypeTag_t k_unHiddenAreaPropertyTag = 30;
+	static const PropertyTypeTag_t k_unPathHandleInfoTag = 31;
+	static const PropertyTypeTag_t k_unActionPropertyTag = 32;
+	static const PropertyTypeTag_t k_unInputValuePropertyTag = 33;
+	static const PropertyTypeTag_t k_unWildcardPropertyTag = 34;
+	static const PropertyTypeTag_t k_unHapticVibrationPropertyTag = 35;
+	static const PropertyTypeTag_t k_unSkeletonPropertyTag = 36;
+
+	static const PropertyTypeTag_t k_unSpatialAnchorPosePropertyTag = 40;
+	static const PropertyTypeTag_t k_unJsonPropertyTag = 41;
+	static const PropertyTypeTag_t k_unActiveActionSetPropertyTag = 42;
+
+	static const PropertyTypeTag_t k_unOpenVRInternalReserved_Start = 1000;
+	static const PropertyTypeTag_t k_unOpenVRInternalReserved_End = 10000;
+
+	/** Each entry in this enum represents a property that can be retrieved about a
+	 * tracked device. Many fields are only valid for one ETrackedDeviceClass. */
+	enum ETrackedDeviceProperty
+	{
+		Prop_Invalid = 0,
+
+		// general properties that apply to all device classes
+		Prop_TrackingSystemName_String = 1000,
+		Prop_ModelNumber_String = 1001,
+		Prop_SerialNumber_String = 1002,
+		Prop_RenderModelName_String = 1003,
+		Prop_WillDriftInYaw_Bool = 1004,
+		Prop_ManufacturerName_String = 1005,
+		Prop_TrackingFirmwareVersion_String = 1006,
+		Prop_HardwareRevision_String = 1007,
+		Prop_AllWirelessDongleDescriptions_String = 1008,
+		Prop_ConnectedWirelessDongle_String = 1009,
+		Prop_DeviceIsWireless_Bool = 1010,
+		Prop_DeviceIsCharging_Bool = 1011,
+		Prop_DeviceBatteryPercentage_Float = 1012, // 0 is empty, 1 is full
+		Prop_StatusDisplayTransform_Matrix34 = 1013,
+		Prop_Firmware_UpdateAvailable_Bool = 1014,
+		Prop_Firmware_ManualUpdate_Bool = 1015,
+		Prop_Firmware_ManualUpdateURL_String = 1016,
+		Prop_HardwareRevision_Uint64 = 1017,
+		Prop_FirmwareVersion_Uint64 = 1018,
+		Prop_FPGAVersion_Uint64 = 1019,
+		Prop_VRCVersion_Uint64 = 1020,
+		Prop_RadioVersion_Uint64 = 1021,
+		Prop_DongleVersion_Uint64 = 1022,
+		Prop_BlockServerShutdown_Bool = 1023,
+		Prop_CanUnifyCoordinateSystemWithHmd_Bool = 1024,
+		Prop_ContainsProximitySensor_Bool = 1025,
+		Prop_DeviceProvidesBatteryStatus_Bool = 1026,
+		Prop_DeviceCanPowerOff_Bool = 1027,
+		Prop_Firmware_ProgrammingTarget_String = 1028,
+		Prop_DeviceClass_Int32 = 1029,
+		Prop_HasCamera_Bool = 1030,
+		Prop_DriverVersion_String = 1031,
+		Prop_Firmware_ForceUpdateRequired_Bool = 1032,
+		Prop_ViveSystemButtonFixRequired_Bool = 1033,
+		Prop_ParentDriver_Uint64 = 1034,
+		Prop_ResourceRoot_String = 1035,
+		Prop_RegisteredDeviceType_String = 1036,
+		Prop_InputProfilePath_String = 1037, // input profile to use for this device in the input system. Will default to tracking system name if this isn't provided
+		Prop_NeverTracked_Bool = 1038,		 // Used for devices that will never have a valid pose by design
+		Prop_NumCameras_Int32 = 1039,
+		Prop_CameraFrameLayout_Int32 = 1040,			 // EVRTrackedCameraFrameLayout value
+		Prop_CameraStreamFormat_Int32 = 1041,			 // ECameraVideoStreamFormat value
+		Prop_AdditionalDeviceSettingsPath_String = 1042, // driver-relative path to additional device and global configuration settings
+		Prop_Identifiable_Bool = 1043,					 // Whether device supports being identified from vrmonitor (e.g. blink LED, vibrate haptics, etc)
+		Prop_BootloaderVersion_Uint64 = 1044,
+		Prop_AdditionalSystemReportData_String = 1045, // additional string to include in system reports about a tracked device
+		Prop_CompositeFirmwareVersion_String = 1046,   // additional FW components from a device that gets propagated into reports
+		Prop_Firmware_RemindUpdate_Bool = 1047,
+		Prop_PeripheralApplicationVersion_Uint64 = 1048,
+		Prop_ManufacturerSerialNumber_String = 1049,
+		Prop_ComputedSerialNumber_String = 1050,
+		Prop_EstimatedDeviceFirstUseTime_Int32 = 1051,
+		Prop_DevicePowerUsage_Float = 1052,
+		Prop_IgnoreMotionForStandby_Bool = 1053,
+
+		// Properties that are unique to TrackedDeviceClass_HMD
+		Prop_ReportsTimeSinceVSync_Bool = 2000,
+		Prop_SecondsFromVsyncToPhotons_Float = 2001,
+		Prop_DisplayFrequency_Float = 2002,
+		Prop_UserIpdMeters_Float = 2003,
+		Prop_CurrentUniverseId_Uint64 = 2004,
+		Prop_PreviousUniverseId_Uint64 = 2005,
+		Prop_DisplayFirmwareVersion_Uint64 = 2006,
+		Prop_IsOnDesktop_Bool = 2007,
+		Prop_DisplayMCType_Int32 = 2008,
+		Prop_DisplayMCOffset_Float = 2009,
+		Prop_DisplayMCScale_Float = 2010,
+		Prop_EdidVendorID_Int32 = 2011,
+		Prop_DisplayMCImageLeft_String = 2012,
+		Prop_DisplayMCImageRight_String = 2013,
+		Prop_DisplayGCBlackClamp_Float = 2014,
+		Prop_EdidProductID_Int32 = 2015,
+		Prop_CameraToHeadTransform_Matrix34 = 2016,
+		Prop_DisplayGCType_Int32 = 2017,
+		Prop_DisplayGCOffset_Float = 2018,
+		Prop_DisplayGCScale_Float = 2019,
+		Prop_DisplayGCPrescale_Float = 2020,
+		Prop_DisplayGCImage_String = 2021,
+		Prop_LensCenterLeftU_Float = 2022,
+		Prop_LensCenterLeftV_Float = 2023,
+		Prop_LensCenterRightU_Float = 2024,
+		Prop_LensCenterRightV_Float = 2025,
+		Prop_UserHeadToEyeDepthMeters_Float = 2026,
+		Prop_CameraFirmwareVersion_Uint64 = 2027,
+		Prop_CameraFirmwareDescription_String = 2028,
+		Prop_DisplayFPGAVersion_Uint64 = 2029,
+		Prop_DisplayBootloaderVersion_Uint64 = 2030,
+		Prop_DisplayHardwareVersion_Uint64 = 2031,
+		Prop_AudioFirmwareVersion_Uint64 = 2032,
+		Prop_CameraCompatibilityMode_Int32 = 2033,
+		Prop_ScreenshotHorizontalFieldOfViewDegrees_Float = 2034,
+		Prop_ScreenshotVerticalFieldOfViewDegrees_Float = 2035,
+		Prop_DisplaySuppressed_Bool = 2036,
+		Prop_DisplayAllowNightMode_Bool = 2037,
+		Prop_DisplayMCImageWidth_Int32 = 2038,
+		Prop_DisplayMCImageHeight_Int32 = 2039,
+		Prop_DisplayMCImageNumChannels_Int32 = 2040,
+		Prop_DisplayMCImageData_Binary = 2041,
+		Prop_SecondsFromPhotonsToVblank_Float = 2042,
+		Prop_DriverDirectModeSendsVsyncEvents_Bool = 2043,
+		Prop_DisplayDebugMode_Bool = 2044,
+		Prop_GraphicsAdapterLuid_Uint64 = 2045,
+		Prop_DriverProvidedChaperonePath_String = 2048,
+		Prop_ExpectedTrackingReferenceCount_Int32 = 2049,			// expected number of sensors or basestations to reserve UI space for
+		Prop_ExpectedControllerCount_Int32 = 2050,					// expected number of tracked controllers to reserve UI space for
+		Prop_NamedIconPathControllerLeftDeviceOff_String = 2051,	// placeholder icon for "left" controller if not yet detected/loaded
+		Prop_NamedIconPathControllerRightDeviceOff_String = 2052,	// placeholder icon for "right" controller if not yet detected/loaded
+		Prop_NamedIconPathTrackingReferenceDeviceOff_String = 2053, // placeholder icon for sensor/base if not yet detected/loaded
+		Prop_DoNotApplyPrediction_Bool = 2054,						// currently no effect. was used to disable HMD pose prediction on MR, which is now done by MR driver setting velocity=0
+		Prop_CameraToHeadTransforms_Matrix34_Array = 2055,
+		Prop_DistortionMeshResolution_Int32 = 2056, // custom resolution of compositor calls to IVRSystem::ComputeDistortion
+		Prop_DriverIsDrawingControllers_Bool = 2057,
+		Prop_DriverRequestsApplicationPause_Bool = 2058,
+		Prop_DriverRequestsReducedRendering_Bool = 2059,
+		Prop_MinimumIpdStepMeters_Float = 2060,
+		Prop_AudioBridgeFirmwareVersion_Uint64 = 2061,
+		Prop_ImageBridgeFirmwareVersion_Uint64 = 2062,
+		Prop_ImuToHeadTransform_Matrix34 = 2063,
+		Prop_ImuFactoryGyroBias_Vector3 = 2064,
+		Prop_ImuFactoryGyroScale_Vector3 = 2065,
+		Prop_ImuFactoryAccelerometerBias_Vector3 = 2066,
+		Prop_ImuFactoryAccelerometerScale_Vector3 = 2067,
+		// reserved 2068
+		Prop_ConfigurationIncludesLighthouse20Features_Bool = 2069,
+		Prop_AdditionalRadioFeatures_Uint64 = 2070,
+		Prop_CameraWhiteBalance_Vector4_Array = 2071,		  // Prop_NumCameras_Int32-sized array of float[4] RGBG white balance calibration data (max size is vr::k_unMaxCameras)
+		Prop_CameraDistortionFunction_Int32_Array = 2072,	  // Prop_NumCameras_Int32-sized array of vr::EVRDistortionFunctionType values (max size is vr::k_unMaxCameras)
+		Prop_CameraDistortionCoefficients_Float_Array = 2073, // Prop_NumCameras_Int32-sized array of double[vr::k_unMaxDistortionFunctionParameters] (max size is vr::k_unMaxCameras)
+		Prop_ExpectedControllerType_String = 2074,
+		Prop_HmdTrackingStyle_Int32 = 2075, // one of EHmdTrackingStyle
+		Prop_DriverProvidedChaperoneVisibility_Bool = 2076,
+		Prop_HmdColumnCorrectionSettingPrefix_String = 2077,
+		Prop_CameraSupportsCompatibilityModes_Bool = 2078,
+		Prop_SupportsRoomViewDepthProjection_Bool = 2079,
+		Prop_DisplayAvailableFrameRates_Float_Array = 2080, // populated by compositor from actual EDID list when available from GPU driver
+		Prop_DisplaySupportsMultipleFramerates_Bool = 2081, // if this is true but Prop_DisplayAvailableFrameRates_Float_Array is empty, explain to user
+		Prop_DisplayColorMultLeft_Vector3 = 2082,
+		Prop_DisplayColorMultRight_Vector3 = 2083,
+		Prop_DisplaySupportsRuntimeFramerateChange_Bool = 2084,
+		Prop_DisplaySupportsAnalogGain_Bool = 2085,
+		Prop_DisplayMinAnalogGain_Float = 2086,
+		Prop_DisplayMaxAnalogGain_Float = 2087,
+		Prop_CameraExposureTime_Float = 2088,
+		Prop_CameraGlobalGain_Float = 2089,
+		// Prop_DashboardLayoutPathName_String 		= 2090, // DELETED
+		Prop_DashboardScale_Float = 2091,
+		Prop_PeerButtonInfo_String = 2092,
+
+		Prop_IpdUIRangeMinMeters_Float = 2100,
+		Prop_IpdUIRangeMaxMeters_Float = 2101,
+		Prop_Hmd_SupportsHDCP14LegacyCompat_Bool = 2102,
+		Prop_Hmd_SupportsMicMonitoring_Bool = 2103,
+		Prop_Hmd_SupportsDisplayPortTrainingMode_Bool = 2104,
+		Prop_SupportsRoomViewDirect_Bool = 2105,
+		Prop_SupportsAppThrottling_Bool = 2106,
+
+		// Driver requested mura correction properties
+		Prop_DriverRequestedMuraCorrectionMode_Int32 = 2200,
+		Prop_DriverRequestedMuraFeather_InnerLeft_Int32 = 2201,
+		Prop_DriverRequestedMuraFeather_InnerRight_Int32 = 2202,
+		Prop_DriverRequestedMuraFeather_InnerTop_Int32 = 2203,
+		Prop_DriverRequestedMuraFeather_InnerBottom_Int32 = 2204,
+		Prop_DriverRequestedMuraFeather_OuterLeft_Int32 = 2205,
+		Prop_DriverRequestedMuraFeather_OuterRight_Int32 = 2206,
+		Prop_DriverRequestedMuraFeather_OuterTop_Int32 = 2207,
+		Prop_DriverRequestedMuraFeather_OuterBottom_Int32 = 2208,
+
+		Prop_Audio_DefaultPlaybackDeviceId_String = 2300,
+		Prop_Audio_DefaultRecordingDeviceId_String = 2301,
+		Prop_Audio_DefaultPlaybackDeviceVolume_Float = 2302,
+		Prop_Audio_SupportsDualSpeakerAndJackOutput_Bool = 2303,
+
+		// Properties that are unique to TrackedDeviceClass_Controller
+		Prop_AttachedDeviceId_String = 3000,
+		Prop_SupportedButtons_Uint64 = 3001,
+		Prop_Axis0Type_Int32 = 3002,		  // Return value is of type EVRControllerAxisType
+		Prop_Axis1Type_Int32 = 3003,		  // Return value is of type EVRControllerAxisType
+		Prop_Axis2Type_Int32 = 3004,		  // Return value is of type EVRControllerAxisType
+		Prop_Axis3Type_Int32 = 3005,		  // Return value is of type EVRControllerAxisType
+		Prop_Axis4Type_Int32 = 3006,		  // Return value is of type EVRControllerAxisType
+		Prop_ControllerRoleHint_Int32 = 3007, // Return value is of type ETrackedControllerRole
+
+		// Properties that are unique to TrackedDeviceClass_TrackingReference
+		Prop_FieldOfViewLeftDegrees_Float = 4000,
+		Prop_FieldOfViewRightDegrees_Float = 4001,
+		Prop_FieldOfViewTopDegrees_Float = 4002,
+		Prop_FieldOfViewBottomDegrees_Float = 4003,
+		Prop_TrackingRangeMinimumMeters_Float = 4004,
+		Prop_TrackingRangeMaximumMeters_Float = 4005,
+		Prop_ModeLabel_String = 4006,
+		Prop_CanWirelessIdentify_Bool = 4007, // volatile, based on radio presence and fw discovery
+		Prop_Nonce_Int32 = 4008,
+
+		// Properties that are used for user interface like icons names
+		Prop_IconPathName_String = 5000,					  // DEPRECATED. Value not referenced. Now expected to be part of icon path properties.
+		Prop_NamedIconPathDeviceOff_String = 5001,			  // {driver}/icons/icon_filename - PNG for static icon, or GIF for animation, 50x32 for headsets and 32x32 for others
+		Prop_NamedIconPathDeviceSearching_String = 5002,	  // {driver}/icons/icon_filename - PNG for static icon, or GIF for animation, 50x32 for headsets and 32x32 for others
+		Prop_NamedIconPathDeviceSearchingAlert_String = 5003, // {driver}/icons/icon_filename - PNG for static icon, or GIF for animation, 50x32 for headsets and 32x32 for others
+		Prop_NamedIconPathDeviceReady_String = 5004,		  // {driver}/icons/icon_filename - PNG for static icon, or GIF for animation, 50x32 for headsets and 32x32 for others
+		Prop_NamedIconPathDeviceReadyAlert_String = 5005,	  // {driver}/icons/icon_filename - PNG for static icon, or GIF for animation, 50x32 for headsets and 32x32 for others
+		Prop_NamedIconPathDeviceNotReady_String = 5006,		  // {driver}/icons/icon_filename - PNG for static icon, or GIF for animation, 50x32 for headsets and 32x32 for others
+		Prop_NamedIconPathDeviceStandby_String = 5007,		  // {driver}/icons/icon_filename - PNG for static icon, or GIF for animation, 50x32 for headsets and 32x32 for others
+		Prop_NamedIconPathDeviceAlertLow_String = 5008,		  // {driver}/icons/icon_filename - PNG for static icon, or GIF for animation, 50x32 for headsets and 32x32 for others
+		Prop_NamedIconPathDeviceStandbyAlert_String = 5009,	  // {driver}/icons/icon_filename - PNG for static icon, or GIF for animation, 50x32 for headsets and 32x32 for others
+
+		// Properties that are used by helpers, but are opaque to applications
+		Prop_DisplayHiddenArea_Binary_Start = 5100,
+		Prop_DisplayHiddenArea_Binary_End = 5150,
+		Prop_ParentContainer = 5151,
+		Prop_OverrideContainer_Uint64 = 5152,
+
+		// Properties that are unique to drivers
+		Prop_UserConfigPath_String = 6000,
+		Prop_InstallPath_String = 6001,
+		Prop_HasDisplayComponent_Bool = 6002,
+		Prop_HasControllerComponent_Bool = 6003,
+		Prop_HasCameraComponent_Bool = 6004,
+		Prop_HasDriverDirectModeComponent_Bool = 6005,
+		Prop_HasVirtualDisplayComponent_Bool = 6006,
+		Prop_HasSpatialAnchorsSupport_Bool = 6007,
+
+		// Properties that are set internally based on other information provided by drivers
+		Prop_ControllerType_String = 7000,
+		// Prop_LegacyInputProfile_String				= 7001, // This is no longer used. See "legacy_binding" in the input profile instead.
+		Prop_ControllerHandSelectionPriority_Int32 = 7002, // Allows hand assignments to prefer some controllers over others. High numbers are selected over low numbers
+
+		// Vendors are free to expose private debug data in this reserved region
+		Prop_VendorSpecific_Reserved_Start = 10000,
+		Prop_VendorSpecific_Reserved_End = 10999,
+
+		Prop_TrackedDeviceProperty_Max = 1000000,
+	};
+
+	/** No string property will ever be longer than this length */
+	static const uint32_t k_unMaxPropertyStringSize = 32 * 1024;
+
+	/** Used to return errors that occur when reading properties. */
+	enum ETrackedPropertyError
+	{
+		TrackedProp_Success = 0,
+		TrackedProp_WrongDataType = 1,
+		TrackedProp_WrongDeviceClass = 2,
+		TrackedProp_BufferTooSmall = 3,
+		TrackedProp_UnknownProperty = 4, // Driver has not set the property (and may not ever).
+		TrackedProp_InvalidDevice = 5,
+		TrackedProp_CouldNotContactServer = 6,
+		TrackedProp_ValueNotProvidedByDevice = 7,
+		TrackedProp_StringExceedsMaximumLength = 8,
+		TrackedProp_NotYetAvailable = 9, // The property value isn't known yet, but is expected soon. Call again later.
+		TrackedProp_PermissionDenied = 10,
+		TrackedProp_InvalidOperation = 11,
+		TrackedProp_CannotWriteToWildcards = 12,
+		TrackedProp_IPCReadFailure = 13,
+		TrackedProp_OutOfMemory = 14,
+		TrackedProp_InvalidContainer = 15,
+	};
+
+	/** Used to drive certain text in the UI when talking about the tracking system for the HMD */
+	enum EHmdTrackingStyle
+	{
+		HmdTrackingStyle_Unknown = 0,
+
+		HmdTrackingStyle_Lighthouse = 1,	   // base stations and lasers
+		HmdTrackingStyle_OutsideInCameras = 2, // Cameras and LED, Rift 1 style
+		HmdTrackingStyle_InsideOutCameras = 3, // Cameras on HMD looking at the world
+	};
+
+	typedef uint64_t VRActionHandle_t;
+	typedef uint64_t VRActionSetHandle_t;
+	typedef uint64_t VRInputValueHandle_t;
+
+	static const VRActionHandle_t k_ulInvalidActionHandle = 0;
+	static const VRActionSetHandle_t k_ulInvalidActionSetHandle = 0;
+	static const VRInputValueHandle_t k_ulInvalidInputValueHandle = 0;
+
+	/** Allows the application to control what part of the provided texture will be used in the
+	 * frame buffer. */
+	struct VRTextureBounds_t
+	{
+		float uMin, vMin;
+		float uMax, vMax;
+	};
+
+	/** Allows specifying pose used to render provided scene texture (if different from value returned by WaitGetPoses). */
+	struct VRTextureWithPose_t : public Texture_t
+	{
+		HmdMatrix34_t mDeviceToAbsoluteTracking; // Actual pose used to render scene textures.
+	};
+
+	struct VRTextureDepthInfo_t
+	{
+		void *handle; // See ETextureType definition above
+		HmdMatrix44_t mProjection;
+		HmdVector2_t vRange; // 0..1
+	};
+
+	struct VRTextureWithDepth_t : public Texture_t
+	{
+		VRTextureDepthInfo_t depth;
+	};
+
+	struct VRTextureWithPoseAndDepth_t : public VRTextureWithPose_t
+	{
+		VRTextureDepthInfo_t depth;
+	};
+
+	/** Allows the application to control how scene textures are used by the compositor when calling Submit. */
+	enum EVRSubmitFlags
+	{
+		// Simple render path. App submits rendered left and right eye images with no lens distortion correction applied.
+		Submit_Default = 0x00,
+
+		// App submits final left and right eye images with lens distortion already applied (lens distortion makes the images appear
+		// barrel distorted with chromatic aberration correction applied). The app would have used the data returned by
+		// vr::IVRSystem::ComputeDistortion() to apply the correct distortion to the rendered images before calling Submit().
+		Submit_LensDistortionAlreadyApplied = 0x01,
+
+		// If the texture pointer passed in is actually a renderbuffer (e.g. for MSAA in OpenGL) then set this flag.
+		Submit_GlRenderBuffer = 0x02,
+
+		// Do not use
+		Submit_Reserved = 0x04,
+
+		// Set to indicate that pTexture is a pointer to a VRTextureWithPose_t.
+		// This flag can be combined with Submit_TextureWithDepth to pass a VRTextureWithPoseAndDepth_t.
+		Submit_TextureWithPose = 0x08,
+
+		// Set to indicate that pTexture is a pointer to a VRTextureWithDepth_t.
+		// This flag can be combined with Submit_TextureWithPose to pass a VRTextureWithPoseAndDepth_t.
+		Submit_TextureWithDepth = 0x10,
+
+		// Set to indicate a discontinuity between this and the last frame.
+		// This will prevent motion smoothing from attempting to extrapolate using the pair.
+		Submit_FrameDiscontinuty = 0x20,
+
+		// Set to indicate that pTexture->handle is a contains VRVulkanTextureArrayData_t
+		Submit_VulkanTextureWithArrayData = 0x40,
+
+		// If the texture pointer passed in is an OpenGL Array texture, set this flag
+		Submit_GlArrayTexture = 0x80,
+
+		// Do not use
+		Submit_Reserved2 = 0x08000,
+		Submit_Reserved3 = 0x10000,
+
+	};
+
+	/** Data required for passing Vulkan textures to IVRCompositor::Submit.
+	 * Be sure to call OpenVR_Shutdown before destroying these resources.
+	 * Please see https://github.com/ValveSoftware/openvr/wiki/Vulkan for Vulkan-specific documentation */
+	struct VRVulkanTextureData_t
+	{
+		uint64_t m_nImage; // VkImage
+		VkDevice_T *m_pDevice;
+		VkPhysicalDevice_T *m_pPhysicalDevice;
+		VkInstance_T *m_pInstance;
+		VkQueue_T *m_pQueue;
+		uint32_t m_nQueueFamilyIndex;
+		uint32_t m_nWidth, m_nHeight, m_nFormat, m_nSampleCount;
+	};
+
+	/** Data required for passing Vulkan texture arrays to IVRCompositor::Submit.
+	 * Be sure to call OpenVR_Shutdown before destroying these resources.
+	 * Please see https://github.com/ValveSoftware/openvr/wiki/Vulkan for Vulkan-specific documentation */
+	struct VRVulkanTextureArrayData_t : public VRVulkanTextureData_t
+	{
+		uint32_t m_unArrayIndex;
+		uint32_t m_unArraySize;
+	};
+
+	/** Data required for passing D3D12 textures to IVRCompositor::Submit.
+	 * Be sure to call OpenVR_Shutdown before destroying these resources. */
+	struct D3D12TextureData_t
+	{
+		ID3D12Resource *m_pResource;
+		ID3D12CommandQueue *m_pCommandQueue;
+		uint32_t m_nNodeMask;
+	};
+
+	/** Status of the overall system or tracked objects */
+	enum EVRState
+	{
+		VRState_Undefined = -1,
+		VRState_Off = 0,
+		VRState_Searching = 1,
+		VRState_Searching_Alert = 2,
+		VRState_Ready = 3,
+		VRState_Ready_Alert = 4,
+		VRState_NotReady = 5,
+		VRState_Standby = 6,
+		VRState_Ready_Alert_Low = 7,
+	};
+
+	/** The types of events that could be posted (and what the parameters mean for each event type) */
+	enum EVREventType
+	{
+		VREvent_None = 0,
+
+		VREvent_TrackedDeviceActivated = 100,
+		VREvent_TrackedDeviceDeactivated = 101,
+		VREvent_TrackedDeviceUpdated = 102,
+		VREvent_TrackedDeviceUserInteractionStarted = 103,
+		VREvent_TrackedDeviceUserInteractionEnded = 104,
+		VREvent_IpdChanged = 105,
+		VREvent_EnterStandbyMode = 106,
+		VREvent_LeaveStandbyMode = 107,
+		VREvent_TrackedDeviceRoleChanged = 108,
+		VREvent_WatchdogWakeUpRequested = 109,
+		VREvent_LensDistortionChanged = 110,
+		VREvent_PropertyChanged = 111,
+		VREvent_WirelessDisconnect = 112,
+		VREvent_WirelessReconnect = 113,
+
+		VREvent_ButtonPress = 200,	 // data is controller
+		VREvent_ButtonUnpress = 201, // data is controller
+		VREvent_ButtonTouch = 202,	 // data is controller
+		VREvent_ButtonUntouch = 203, // data is controller
+
+		// VREvent_DualAnalog_Press			= 250, // No longer sent
+		// VREvent_DualAnalog_Unpress		= 251, // No longer sent
+		// VREvent_DualAnalog_Touch			= 252, // No longer sent
+		// VREvent_DualAnalog_Untouch		= 253, // No longer sent
+		// VREvent_DualAnalog_Move			= 254, // No longer sent
+		// VREvent_DualAnalog_ModeSwitch1	= 255, // No longer sent
+		// VREvent_DualAnalog_ModeSwitch2	= 256, // No longer sent
+		VREvent_Modal_Cancel = 257, // Sent to overlays with the
+
+		VREvent_MouseMove = 300,		   // data is mouse
+		VREvent_MouseButtonDown = 301,	   // data is mouse
+		VREvent_MouseButtonUp = 302,	   // data is mouse
+		VREvent_FocusEnter = 303,		   // data is overlay
+		VREvent_FocusLeave = 304,		   // data is overlay
+		VREvent_ScrollDiscrete = 305,	   // data is scroll
+		VREvent_TouchPadMove = 306,		   // data is mouse
+		VREvent_OverlayFocusChanged = 307, // data is overlay, global event
+		VREvent_ReloadOverlays = 308,
+		VREvent_ScrollSmooth = 309, // data is scroll
+		VREvent_LockMousePosition = 310,
+		VREvent_UnlockMousePosition = 311,
+
+		VREvent_InputFocusCaptured = 400, // data is process DEPRECATED
+		VREvent_InputFocusReleased = 401, // data is process DEPRECATED
+		// VREvent_SceneFocusLost			= 402, // data is process
+		// VREvent_SceneFocusGained			= 403, // data is process
+		VREvent_SceneApplicationChanged = 404, // data is process - The App actually drawing the scene changed (usually to or from the compositor)
+		VREvent_SceneFocusChanged = 405,	   // data is process - New app got access to draw the scene
+		VREvent_InputFocusChanged = 406,	   // data is process
+		// VREvent_SceneApplicationSecondaryRenderingStarted = 407,
+		VREvent_SceneApplicationUsingWrongGraphicsAdapter = 408, // data is process
+		VREvent_ActionBindingReloaded = 409,					 // data is process - The App that action binds reloaded for
+
+		VREvent_HideRenderModels = 410, // Sent to the scene application to request hiding render models temporarily
+		VREvent_ShowRenderModels = 411, // Sent to the scene application to request restoring render model visibility
+
+		VREvent_SceneApplicationStateChanged = 412, // No data; but query VRApplications()->GetSceneApplicationState();
+
+		VREvent_ConsoleOpened = 420,
+		VREvent_ConsoleClosed = 421,
+
+		VREvent_OverlayShown = 500,
+		VREvent_OverlayHidden = 501,
+		VREvent_DashboardActivated = 502,
+		VREvent_DashboardDeactivated = 503,
+		// VREvent_DashboardThumbSelected		= 504, // Sent to the overlay manager - data is overlay - No longer sent
+		VREvent_DashboardRequested = 505, // Sent to the overlay manager - data is overlay
+		VREvent_ResetDashboard = 506,	  // Send to the overlay manager
+		// VREvent_RenderToast					= 507, // Send to the dashboard to render a toast - data is the notification ID -- no longer sent
+		VREvent_ImageLoaded = 508,				 // Sent to overlays when a SetOverlayRaw or SetOverlayFromFile call finishes loading
+		VREvent_ShowKeyboard = 509,				 // Sent to keyboard renderer in the dashboard to invoke it
+		VREvent_HideKeyboard = 510,				 // Sent to keyboard renderer in the dashboard to hide it
+		VREvent_OverlayGamepadFocusGained = 511, // Sent to an overlay when IVROverlay::SetFocusOverlay is called on it
+		VREvent_OverlayGamepadFocusLost = 512,	 // Send to an overlay when it previously had focus and IVROverlay::SetFocusOverlay is called on something else
+		VREvent_OverlaySharedTextureChanged = 513,
+		// VREvent_DashboardGuideButtonDown	= 514, // These are no longer sent
+		// VREvent_DashboardGuideButtonUp		= 515,
+		VREvent_ScreenshotTriggered = 516, // Screenshot button combo was pressed, Dashboard should request a screenshot
+		VREvent_ImageFailed = 517,		   // Sent to overlays when a SetOverlayRaw or SetOverlayfromFail fails to load
+		VREvent_DashboardOverlayCreated = 518,
+		VREvent_SwitchGamepadFocus = 519,
+
+		// Screenshot API
+		VREvent_RequestScreenshot = 520,			 // Sent by vrclient application to compositor to take a screenshot
+		VREvent_ScreenshotTaken = 521,				 // Sent by compositor to the application that the screenshot has been taken
+		VREvent_ScreenshotFailed = 522,				 // Sent by compositor to the application that the screenshot failed to be taken
+		VREvent_SubmitScreenshotToDashboard = 523,	 // Sent by compositor to the dashboard that a completed screenshot was submitted
+		VREvent_ScreenshotProgressToDashboard = 524, // Sent by compositor to the dashboard that a completed screenshot was submitted
+
+		VREvent_PrimaryDashboardDeviceChanged = 525,
+		VREvent_RoomViewShown = 526,  // Sent by compositor whenever room-view is enabled
+		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_StartDashboard = 532,
+		VREvent_ElevatePrism = 533,
+
+		VREvent_OverlayClosed = 534,
+
+		VREvent_Notification_Shown = 600,
+		VREvent_Notification_Hidden = 601,
+		VREvent_Notification_BeginInteraction = 602,
+		VREvent_Notification_Destroyed = 603,
+
+		VREvent_Quit = 700,		   // data is process
+		VREvent_ProcessQuit = 701, // data is process
+		// VREvent_QuitAborted_UserPrompt			= 702, // data is process
+		VREvent_QuitAcknowledged = 703,	   // data is process
+		VREvent_DriverRequestedQuit = 704, // The driver has requested that SteamVR shut down
+		VREvent_RestartRequested = 705,	   // A driver or other component wants the user to restart SteamVR
+		VREvent_InvalidateSwapTextureSets = 706,
+
+		VREvent_ChaperoneDataHasChanged = 800, // this will never happen with the new chaperone system
+		VREvent_ChaperoneUniverseHasChanged = 801,
+		VREvent_ChaperoneTempDataHasChanged = 802, // this will never happen with the new chaperone system
+		VREvent_ChaperoneSettingsHaveChanged = 803,
+		VREvent_SeatedZeroPoseReset = 804,
+		VREvent_ChaperoneFlushCache = 805,		  // Sent when the process needs to reload any cached data it retrieved from VRChaperone()
+		VREvent_ChaperoneRoomSetupStarting = 806, // Triggered by CVRChaperoneClient::RoomSetupStarting
+		VREvent_ChaperoneRoomSetupFinished = 807, // Triggered by CVRChaperoneClient::CommitWorkingCopy
+		VREvent_StandingZeroPoseReset = 808,
+
+		VREvent_AudioSettingsHaveChanged = 820,
+
+		VREvent_BackgroundSettingHasChanged = 850,
+		VREvent_CameraSettingsHaveChanged = 851,
+		VREvent_ReprojectionSettingHasChanged = 852,
+		VREvent_ModelSkinSettingsHaveChanged = 853,
+		VREvent_EnvironmentSettingsHaveChanged = 854,
+		VREvent_PowerSettingsHaveChanged = 855,
+		VREvent_EnableHomeAppSettingsHaveChanged = 856,
+		VREvent_SteamVRSectionSettingChanged = 857,
+		VREvent_LighthouseSectionSettingChanged = 858,
+		VREvent_NullSectionSettingChanged = 859,
+		VREvent_UserInterfaceSectionSettingChanged = 860,
+		VREvent_NotificationsSectionSettingChanged = 861,
+		VREvent_KeyboardSectionSettingChanged = 862,
+		VREvent_PerfSectionSettingChanged = 863,
+		VREvent_DashboardSectionSettingChanged = 864,
+		VREvent_WebInterfaceSectionSettingChanged = 865,
+		VREvent_TrackersSectionSettingChanged = 866,
+		VREvent_LastKnownSectionSettingChanged = 867,
+		VREvent_DismissedWarningsSectionSettingChanged = 868,
+		VREvent_GpuSpeedSectionSettingChanged = 869,
+		VREvent_WindowsMRSectionSettingChanged = 870,
+		VREvent_OtherSectionSettingChanged = 871,
+
+		VREvent_StatusUpdate = 900,
+
+		VREvent_WebInterface_InstallDriverCompleted = 950,
+
+		VREvent_MCImageUpdated = 1000,
+
+		VREvent_FirmwareUpdateStarted = 1100,
+		VREvent_FirmwareUpdateFinished = 1101,
+
+		VREvent_KeyboardClosed = 1200,
+		VREvent_KeyboardCharInput = 1201,
+		VREvent_KeyboardDone = 1202, // Sent when DONE button clicked on keyboard
+
+		// VREvent_ApplicationTransitionStarted		= 1300,
+		// VREvent_ApplicationTransitionAborted		= 1301,
+		// VREvent_ApplicationTransitionNewAppStarted	= 1302,
+		VREvent_ApplicationListUpdated = 1303,
+		VREvent_ApplicationMimeTypeLoad = 1304,
+		// VREvent_ApplicationTransitionNewAppLaunchComplete = 1305,
+		VREvent_ProcessConnected = 1306,
+		VREvent_ProcessDisconnected = 1307,
+
+		// VREvent_Compositor_MirrorWindowShown		= 1400, // DEPRECATED
+		// VREvent_Compositor_MirrorWindowHidden		= 1401, // DEPRECATED
+		VREvent_Compositor_ChaperoneBoundsShown = 1410,
+		VREvent_Compositor_ChaperoneBoundsHidden = 1411,
+		VREvent_Compositor_DisplayDisconnected = 1412,
+		VREvent_Compositor_DisplayReconnected = 1413,
+		VREvent_Compositor_HDCPError = 1414, // data is hdcpError
+		VREvent_Compositor_ApplicationNotResponding = 1415,
+		VREvent_Compositor_ApplicationResumed = 1416,
+		VREvent_Compositor_OutOfVideoMemory = 1417,
+		VREvent_Compositor_DisplayModeNotSupported = 1418, // k_pch_SteamVR_PreferredRefreshRate
+		VREvent_Compositor_StageOverrideReady = 1419,
+		VREvent_Compositor_RequestDisconnectReconnect = 1420,
+
+		VREvent_TrackedCamera_StartVideoStream = 1500,
+		VREvent_TrackedCamera_StopVideoStream = 1501,
+		VREvent_TrackedCamera_PauseVideoStream = 1502,
+		VREvent_TrackedCamera_ResumeVideoStream = 1503,
+		VREvent_TrackedCamera_EditingSurface = 1550,
+
+		VREvent_PerformanceTest_EnableCapture = 1600,
+		VREvent_PerformanceTest_DisableCapture = 1601,
+		VREvent_PerformanceTest_FidelityLevel = 1602,
+
+		VREvent_MessageOverlay_Closed = 1650,
+		VREvent_MessageOverlayCloseRequested = 1651,
+
+		VREvent_Input_HapticVibration = 1700,		   // data is hapticVibration
+		VREvent_Input_BindingLoadFailed = 1701,		   // data is inputBinding
+		VREvent_Input_BindingLoadSuccessful = 1702,	   // data is inputBinding
+		VREvent_Input_ActionManifestReloaded = 1703,   // no data
+		VREvent_Input_ActionManifestLoadFailed = 1704, // data is actionManifest
+		VREvent_Input_ProgressUpdate = 1705,		   // data is progressUpdate
+		VREvent_Input_TrackerActivated = 1706,
+		VREvent_Input_BindingsUpdated = 1707,
+		VREvent_Input_BindingSubscriptionChanged = 1708,
+
+		VREvent_SpatialAnchors_PoseUpdated = 1800,			   // data is spatialAnchor. broadcast
+		VREvent_SpatialAnchors_DescriptorUpdated = 1801,	   // data is spatialAnchor. broadcast
+		VREvent_SpatialAnchors_RequestPoseUpdate = 1802,	   // data is spatialAnchor. sent to specific driver
+		VREvent_SpatialAnchors_RequestDescriptorUpdate = 1803, // data is spatialAnchor. sent to specific driver
+
+		VREvent_SystemReport_Started = 1900, // user or system initiated generation of a system report. broadcast
+
+		VREvent_Monitor_ShowHeadsetView = 2000, // data is process
+		VREvent_Monitor_HideHeadsetView = 2001, // data is process
+
+		// Vendors are free to expose private events in this reserved region
+		VREvent_VendorSpecific_Reserved_Start = 10000,
+		VREvent_VendorSpecific_Reserved_End = 19999,
+	};
+
+	/** Level of Hmd activity */
+	// UserInteraction_Timeout means the device is in the process of timing out.
+	// InUse = ( k_EDeviceActivityLevel_UserInteraction || k_EDeviceActivityLevel_UserInteraction_Timeout )
+	// VREvent_TrackedDeviceUserInteractionStarted fires when the devices transitions from Standby -> UserInteraction or Idle -> UserInteraction.
+	// VREvent_TrackedDeviceUserInteractionEnded fires when the devices transitions from UserInteraction_Timeout -> Idle
+	enum EDeviceActivityLevel
+	{
+		k_EDeviceActivityLevel_Unknown = -1,
+		k_EDeviceActivityLevel_Idle = 0,					// No activity for the last 10 seconds
+		k_EDeviceActivityLevel_UserInteraction = 1,			// Activity (movement or prox sensor) is happening now
+		k_EDeviceActivityLevel_UserInteraction_Timeout = 2, // No activity for the last 0.5 seconds
+		k_EDeviceActivityLevel_Standby = 3,					// Idle for at least 5 seconds (configurable in Settings -> Power Management)
+		k_EDeviceActivityLevel_Idle_Timeout = 4,
+	};
+
+	/** VR controller button and axis IDs */
+	enum EVRButtonId
+	{
+		k_EButton_System = 0,
+		k_EButton_ApplicationMenu = 1,
+		k_EButton_Grip = 2,
+		k_EButton_DPad_Left = 3,
+		k_EButton_DPad_Up = 4,
+		k_EButton_DPad_Right = 5,
+		k_EButton_DPad_Down = 6,
+		k_EButton_A = 7,
+
+		k_EButton_ProximitySensor = 31,
+
+		k_EButton_Axis0 = 32,
+		k_EButton_Axis1 = 33,
+		k_EButton_Axis2 = 34,
+		k_EButton_Axis3 = 35,
+		k_EButton_Axis4 = 36,
+
+		// aliases for well known controllers
+		k_EButton_SteamVR_Touchpad = k_EButton_Axis0,
+		k_EButton_SteamVR_Trigger = k_EButton_Axis1,
+
+		k_EButton_Dashboard_Back = k_EButton_Grip,
+
+		k_EButton_IndexController_A = k_EButton_Grip,
+		k_EButton_IndexController_B = k_EButton_ApplicationMenu,
+		k_EButton_IndexController_JoyStick = k_EButton_Axis3,
+
+		k_EButton_Max = 64
+	};
+
+	inline uint64_t ButtonMaskFromId(EVRButtonId id) { return 1ull << id; }
+
+	/** used for controller button events */
+	struct VREvent_Controller_t
+	{
+		uint32_t button; // EVRButtonId enum
+	};
+
+	/** used for simulated mouse events in overlay space */
+	enum EVRMouseButton
+	{
+		VRMouseButton_Left = 0x0001,
+		VRMouseButton_Right = 0x0002,
+		VRMouseButton_Middle = 0x0004,
+	};
+
+	/** used for simulated mouse events in overlay space */
+	struct VREvent_Mouse_t
+	{
+		float x, y;		 // co-ords are in GL space, bottom left of the texture is 0,0
+		uint32_t button; // EVRMouseButton enum
+	};
+
+	/** used for simulated mouse wheel scroll */
+	struct VREvent_Scroll_t
+	{
+		float xdelta, ydelta;
+		uint32_t unused;
+		float viewportscale; // For scrolling on an overlay with laser mouse, this is the overlay's vertical size relative to the overlay height. Range: [0,1]
+	};
+
+	/** when in mouse input mode you can receive data from the touchpad, these events are only sent if the users finger
+	   is on the touchpad (or just released from it). These events are sent to overlays with the VROverlayFlags_SendVRTouchpadEvents
+	   flag set.
+	**/
+	struct VREvent_TouchPadMove_t
+	{
+		// true if the users finger is detected on the touch pad
+		bool bFingerDown;
+
+		// How long the finger has been down in seconds
+		float flSecondsFingerDown;
+
+		// These values indicate the starting finger position (so you can do some basic swipe stuff)
+		float fValueXFirst;
+		float fValueYFirst;
+
+		// This is the raw sampled coordinate without deadzoning
+		float fValueXRaw;
+		float fValueYRaw;
+	};
+
+	/** notification related events. Details will still change at this point */
+	struct VREvent_Notification_t
+	{
+		uint64_t ulUserValue;
+		uint32_t notificationId;
+	};
+
+	/** Used for events about processes */
+	struct VREvent_Process_t
+	{
+		uint32_t pid;
+		uint32_t oldPid;
+		bool bForced;
+		// If the associated event was triggered by a connection loss
+		bool bConnectionLost;
+	};
+
+	/** Used for a few events about overlays */
+	struct VREvent_Overlay_t
+	{
+		uint64_t overlayHandle;
+		uint64_t devicePath;
+		uint64_t memoryBlockId;
+	};
+
+	/** Used for a few events about overlays */
+	struct VREvent_Status_t
+	{
+		uint32_t statusState; // EVRState enum
+	};
+
+	/** Used for keyboard events **/
+	struct VREvent_Keyboard_t
+	{
+		char cNewInput[8];	 // Up to 11 bytes of new input
+		uint64_t uUserValue; // Possible flags about the new input
+	};
+
+	struct VREvent_Ipd_t
+	{
+		float ipdMeters;
+	};
+
+	struct VREvent_Chaperone_t
+	{
+		uint64_t m_nPreviousUniverse;
+		uint64_t m_nCurrentUniverse;
+	};
+
+	/** Not actually used for any events */
+	struct VREvent_Reserved_t
+	{
+		uint64_t reserved0;
+		uint64_t reserved1;
+		uint64_t reserved2;
+		uint64_t reserved3;
+		uint64_t reserved4;
+		uint64_t reserved5;
+	};
+
+	struct VREvent_PerformanceTest_t
+	{
+		uint32_t m_nFidelityLevel;
+	};
+
+	struct VREvent_SeatedZeroPoseReset_t
+	{
+		bool bResetBySystemMenu;
+	};
+
+	struct VREvent_Screenshot_t
+	{
+		uint32_t handle;
+		uint32_t type;
+	};
+
+	struct VREvent_ScreenshotProgress_t
+	{
+		float progress;
+	};
+
+	struct VREvent_ApplicationLaunch_t
+	{
+		uint32_t pid;
+		uint32_t unArgsHandle;
+	};
+
+	struct VREvent_EditingCameraSurface_t
+	{
+		uint64_t overlayHandle;
+		uint32_t nVisualMode;
+	};
+
+	struct VREvent_MessageOverlay_t
+	{
+		uint32_t unVRMessageOverlayResponse; // vr::VRMessageOverlayResponse enum
+	};
+
+	struct VREvent_Property_t
+	{
+		PropertyContainerHandle_t container;
+		ETrackedDeviceProperty prop;
+	};
+
+	struct VREvent_HapticVibration_t
+	{
+		uint64_t containerHandle; // property container handle of the device with the haptic component
+		uint64_t componentHandle; // Which haptic component needs to vibrate
+		float fDurationSeconds;
+		float fFrequency;
+		float fAmplitude;
+	};
+
+	struct VREvent_WebConsole_t
+	{
+		WebConsoleHandle_t webConsoleHandle;
+	};
+
+	struct VREvent_InputBindingLoad_t
+	{
+		vr::PropertyContainerHandle_t ulAppContainer;
+		uint64_t pathMessage;
+		uint64_t pathUrl;
+		uint64_t pathControllerType;
+	};
+
+	struct VREvent_InputActionManifestLoad_t
+	{
+		uint64_t pathAppKey;
+		uint64_t pathMessage;
+		uint64_t pathMessageParam;
+		uint64_t pathManifestPath;
+	};
+
+	struct VREvent_SpatialAnchor_t
+	{
+		SpatialAnchorHandle_t unHandle;
+	};
+
+	struct VREvent_ProgressUpdate_t
+	{
+		uint64_t ulApplicationPropertyContainer;
+		uint64_t pathDevice;
+		uint64_t pathInputSource;
+		uint64_t pathProgressAction;
+		uint64_t pathIcon;
+		float fProgress;
+	};
+
+	enum EShowUIType
+	{
+		ShowUI_ControllerBinding = 0,
+		ShowUI_ManageTrackers = 1,
+		// ShowUI_QuickStart = 2, // Deprecated
+		ShowUI_Pairing = 3,
+		ShowUI_Settings = 4,
+		ShowUI_DebugCommands = 5,
+		ShowUI_FullControllerBinding = 6,
+		ShowUI_ManageDrivers = 7,
+	};
+
+	struct VREvent_ShowUI_t
+	{
+		EShowUIType eType;
+	};
+
+	struct VREvent_ShowDevTools_t
+	{
+		int32_t nBrowserIdentifier;
+	};
+
+	enum EHDCPError
+	{
+		HDCPError_None = 0,
+		HDCPError_LinkLost = 1,
+		HDCPError_Tampered = 2,
+		HDCPError_DeviceRevoked = 3,
+		HDCPError_Unknown = 4
+	};
+
+	struct VREvent_HDCPError_t
+	{
+		EHDCPError eCode;
+	};
+
+	typedef union
+	{
+		VREvent_Reserved_t reserved;
+		VREvent_Controller_t controller;
+		VREvent_Mouse_t mouse;
+		VREvent_Scroll_t scroll;
+		VREvent_Process_t process;
+		VREvent_Notification_t notification;
+		VREvent_Overlay_t overlay;
+		VREvent_Status_t status;
+		VREvent_Keyboard_t keyboard;
+		VREvent_Ipd_t ipd;
+		VREvent_Chaperone_t chaperone;
+		VREvent_PerformanceTest_t performanceTest;
+		VREvent_TouchPadMove_t touchPadMove;
+		VREvent_SeatedZeroPoseReset_t seatedZeroPoseReset;
+		VREvent_Screenshot_t screenshot;
+		VREvent_ScreenshotProgress_t screenshotProgress;
+		VREvent_ApplicationLaunch_t applicationLaunch;
+		VREvent_EditingCameraSurface_t cameraSurface;
+		VREvent_MessageOverlay_t messageOverlay;
+		VREvent_Property_t property;
+		VREvent_HapticVibration_t hapticVibration;
+		VREvent_WebConsole_t webConsole;
+		VREvent_InputBindingLoad_t inputBinding;
+		VREvent_InputActionManifestLoad_t actionManifest;
+		VREvent_SpatialAnchor_t spatialAnchor;
+		VREvent_ProgressUpdate_t progressUpdate;
+		VREvent_ShowUI_t showUi;
+		VREvent_ShowDevTools_t showDevTools;
+		VREvent_HDCPError_t hdcpError;
+		/** NOTE!!! If you change this you MUST manually update openvr_interop.cs.py */
+	} VREvent_Data_t;
+
+#if defined(__linux__) || defined(__APPLE__)
+// This structure was originally defined mis-packed on Linux, preserved for
+// compatibility.
+#pragma pack(push, 4)
+#endif
+
+	/** An event posted by the server to all running applications */
+	struct VREvent_t
+	{
+		uint32_t eventType; // EVREventType enum
+		TrackedDeviceIndex_t trackedDeviceIndex;
+		float eventAgeSeconds;
+		// event data must be the end of the struct as its size is variable
+		VREvent_Data_t data;
+	};
+
+#if defined(__linux__) || defined(__APPLE__)
+#pragma pack(pop)
+#endif
+
+	typedef uint32_t VRComponentProperties;
+
+	enum EVRComponentProperty
+	{
+		VRComponentProperty_IsStatic = (1 << 0),
+		VRComponentProperty_IsVisible = (1 << 1),
+		VRComponentProperty_IsTouched = (1 << 2),
+		VRComponentProperty_IsPressed = (1 << 3),
+		VRComponentProperty_IsScrolled = (1 << 4),
+		VRComponentProperty_IsHighlighted = (1 << 5),
+	};
+
+	/** Describes state information about a render-model component, including transforms and other dynamic properties */
+	struct RenderModel_ComponentState_t
+	{
+		HmdMatrix34_t mTrackingToComponentRenderModel; // Transform required when drawing the component render model
+		HmdMatrix34_t mTrackingToComponentLocal;	   // Transform available for attaching to a local component coordinate system (-Z out from surface )
+		VRComponentProperties uProperties;
+	};
+
+	enum EVRInputError
+	{
+		VRInputError_None = 0,
+		VRInputError_NameNotFound = 1,
+		VRInputError_WrongType = 2,
+		VRInputError_InvalidHandle = 3,
+		VRInputError_InvalidParam = 4,
+		VRInputError_NoSteam = 5,
+		VRInputError_MaxCapacityReached = 6,
+		VRInputError_IPCError = 7,
+		VRInputError_NoActiveActionSet = 8,
+		VRInputError_InvalidDevice = 9,
+		VRInputError_InvalidSkeleton = 10,
+		VRInputError_InvalidBoneCount = 11,
+		VRInputError_InvalidCompressedData = 12,
+		VRInputError_NoData = 13,
+		VRInputError_BufferTooSmall = 14,
+		VRInputError_MismatchedActionManifest = 15,
+		VRInputError_MissingSkeletonData = 16,
+		VRInputError_InvalidBoneIndex = 17,
+		VRInputError_InvalidPriority = 18,
+		VRInputError_PermissionDenied = 19,
+		VRInputError_InvalidRenderModel = 20,
+	};
+
+	enum EVRSpatialAnchorError
+	{
+		VRSpatialAnchorError_Success = 0,
+		VRSpatialAnchorError_Internal = 1,
+		VRSpatialAnchorError_UnknownHandle = 2,
+		VRSpatialAnchorError_ArrayTooSmall = 3,
+		VRSpatialAnchorError_InvalidDescriptorChar = 4,
+		VRSpatialAnchorError_NotYetAvailable = 5,
+		VRSpatialAnchorError_NotAvailableInThisUniverse = 6,
+		VRSpatialAnchorError_PermanentlyUnavailable = 7,
+		VRSpatialAnchorError_WrongDriver = 8,
+		VRSpatialAnchorError_DescriptorTooLong = 9,
+		VRSpatialAnchorError_Unknown = 10,
+		VRSpatialAnchorError_NoRoomCalibration = 11,
+		VRSpatialAnchorError_InvalidArgument = 12,
+		VRSpatialAnchorError_UnknownDriver = 13,
+	};
+
+	/** The mesh to draw into the stencil (or depth) buffer to perform
+	 * early stencil (or depth) kills of pixels that will never appear on the HMD.
+	 * This mesh draws on all the pixels that will be hidden after distortion.
+	 *
+	 * If the HMD does not provide a visible area mesh pVertexData will be
+	 * NULL and unTriangleCount will be 0. */
+	struct HiddenAreaMesh_t
+	{
+		const HmdVector2_t *pVertexData;
+		uint32_t unTriangleCount;
+	};
+
+	enum EHiddenAreaMeshType
+	{
+		k_eHiddenAreaMesh_Standard = 0,
+		k_eHiddenAreaMesh_Inverse = 1,
+		k_eHiddenAreaMesh_LineLoop = 2,
+
+		k_eHiddenAreaMesh_Max = 3,
+	};
+
+	/** Identifies what kind of axis is on the controller at index n. Read this type
+	 * with pVRSystem->Get( nControllerDeviceIndex, Prop_Axis0Type_Int32 + n );
+	 */
+	enum EVRControllerAxisType
+	{
+		k_eControllerAxis_None = 0,
+		k_eControllerAxis_TrackPad = 1,
+		k_eControllerAxis_Joystick = 2,
+		k_eControllerAxis_Trigger = 3, // Analog trigger data is in the X axis
+	};
+
+	/** contains information about one axis on the controller */
+	struct VRControllerAxis_t
+	{
+		float x; // Ranges from -1.0 to 1.0 for joysticks and track pads. Ranges from 0.0 to 1.0 for triggers were 0 is fully released.
+		float y; // Ranges from -1.0 to 1.0 for joysticks and track pads. Is always 0.0 for triggers.
+	};
+
+	/** the number of axes in the controller state */
+	static const uint32_t k_unControllerStateAxisCount = 5;
+
+#if defined(__linux__) || defined(__APPLE__)
+// This structure was originally defined mis-packed on Linux, preserved for
+// compatibility.
+#pragma pack(push, 4)
+#endif
+
+	/** Holds all the state of a controller at one moment in time. */
+	struct VRControllerState001_t
+	{
+		// If packet num matches that on your prior call, then the controller state hasn't been changed since
+		// your last call and there is no need to process it
+		uint32_t unPacketNum;
+
+		// bit flags for each of the buttons. Use ButtonMaskFromId to turn an ID into a mask
+		uint64_t ulButtonPressed;
+		uint64_t ulButtonTouched;
+
+		// Axis data for the controller's analog inputs
+		VRControllerAxis_t rAxis[k_unControllerStateAxisCount];
+	};
+#if defined(__linux__) || defined(__APPLE__)
+#pragma pack(pop)
+#endif
+
+	typedef VRControllerState001_t VRControllerState_t;
+
+	/** determines how to provide output to the application of various event processing functions. */
+	enum EVRControllerEventOutputType
+	{
+		ControllerEventOutput_OSEvents = 0,
+		ControllerEventOutput_VREvents = 1,
+	};
+
+	/** Collision Bounds Style */
+	enum ECollisionBoundsStyle
+	{
+		COLLISION_BOUNDS_STYLE_BEGINNER = 0,
+		COLLISION_BOUNDS_STYLE_INTERMEDIATE,
+		COLLISION_BOUNDS_STYLE_SQUARES,
+		COLLISION_BOUNDS_STYLE_ADVANCED,
+		COLLISION_BOUNDS_STYLE_NONE,
+
+		COLLISION_BOUNDS_STYLE_COUNT
+	};
+
+	/** used to refer to a single VR overlay */
+	typedef uint64_t VROverlayHandle_t;
+
+	static const VROverlayHandle_t k_ulOverlayHandleInvalid = 0;
+
+	/** Errors that can occur around VR overlays */
+	enum EVROverlayError
+	{
+		VROverlayError_None = 0,
+
+		VROverlayError_UnknownOverlay = 10,
+		VROverlayError_InvalidHandle = 11,
+		VROverlayError_PermissionDenied = 12,
+		VROverlayError_OverlayLimitExceeded = 13, // No more overlays could be created because the maximum number already exist
+		VROverlayError_WrongVisibilityType = 14,
+		VROverlayError_KeyTooLong = 15,
+		VROverlayError_NameTooLong = 16,
+		VROverlayError_KeyInUse = 17,
+		VROverlayError_WrongTransformType = 18,
+		VROverlayError_InvalidTrackedDevice = 19,
+		VROverlayError_InvalidParameter = 20,
+		VROverlayError_ThumbnailCantBeDestroyed = 21,
+		VROverlayError_ArrayTooSmall = 22,
+		VROverlayError_RequestFailed = 23,
+		VROverlayError_InvalidTexture = 24,
+		VROverlayError_UnableToLoadFile = 25,
+		VROverlayError_KeyboardAlreadyInUse = 26,
+		VROverlayError_NoNeighbor = 27,
+		VROverlayError_TooManyMaskPrimitives = 29,
+		VROverlayError_BadMaskPrimitive = 30,
+		VROverlayError_TextureAlreadyLocked = 31,
+		VROverlayError_TextureLockCapacityReached = 32,
+		VROverlayError_TextureNotLocked = 33,
+		VROverlayError_TimedOut = 34,
+	};
+
+	/** enum values to pass in to VR_Init to identify whether the application will
+	 * draw a 3D scene. */
+	enum EVRApplicationType
+	{
+		VRApplication_Other = 0,		  // Some other kind of application that isn't covered by the other entries
+		VRApplication_Scene = 1,		  // Application will submit 3D frames
+		VRApplication_Overlay = 2,		  // Application only interacts with overlays
+		VRApplication_Background = 3,	  // Application should not start SteamVR if it's not already running, and should not
+										  // keep it running if everything else quits.
+		VRApplication_Utility = 4,		  // Init should not try to load any drivers. The application needs access to utility
+										  // interfaces (like IVRSettings and IVRApplications) but not hardware.
+		VRApplication_VRMonitor = 5,	  // Reserved for vrmonitor
+		VRApplication_SteamWatchdog = 6,  // Reserved for Steam
+		VRApplication_Bootstrapper = 7,	  // reserved for vrstartup
+		VRApplication_WebHelper = 8,	  // reserved for vrwebhelper
+		VRApplication_OpenXRInstance = 9, // reserved for openxr (created instance, but not session yet)
+		VRApplication_OpenXRScene = 10,	  // reserved for openxr (started session)
+		VRApplication_OpenXROverlay = 11, // reserved for openxr (started overlay session)
+		VRApplication_Prism = 12,		  // reserved for the vrprismhost process
+		VRApplication_RoomView = 13,	  // reserved for the RoomView process
+
+		VRApplication_Max
+	};
+
+	/** returns true if the specified application type is one of the
+	 * OpenXR types */
+	inline bool IsOpenXRAppType(EVRApplicationType eType)
+	{
+		return eType == VRApplication_OpenXRInstance || eType == VRApplication_OpenXRScene || eType == VRApplication_OpenXROverlay;
+	}
+
+	/** returns true if the specified application type submits eye buffers */
+	inline bool BAppTypeSubmitsEyeBuffers(EVRApplicationType eType)
+	{
+		return eType == VRApplication_Scene || eType == VRApplication_OpenXRScene || eType == VRApplication_RoomView;
+	}
+
+	/** error codes for firmware */
+	enum EVRFirmwareError
+	{
+		VRFirmwareError_None = 0,
+		VRFirmwareError_Success = 1,
+		VRFirmwareError_Fail = 2,
+	};
+
+	/** error codes for notifications */
+	enum EVRNotificationError
+	{
+		VRNotificationError_OK = 0,
+		VRNotificationError_InvalidNotificationId = 100,
+		VRNotificationError_NotificationQueueFull = 101,
+		VRNotificationError_InvalidOverlayHandle = 102,
+		VRNotificationError_SystemWithUserValueAlreadyExists = 103,
+	};
+
+	enum EVRSkeletalMotionRange
+	{
+		// The range of motion of the skeleton takes into account any physical limits imposed by
+		// the controller itself.  This will tend to be the most accurate pose compared to the user's
+		// actual hand pose, but might not allow a closed fist for example
+		VRSkeletalMotionRange_WithController = 0,
+
+		// Retarget the range of motion provided by the input device to make the hand appear to move
+		// as if it was not holding a controller.  eg: map "hand grasping controller" to "closed fist"
+		VRSkeletalMotionRange_WithoutController = 1,
+	};
+
+	enum EVRSkeletalTrackingLevel
+	{
+		// body part location can't be directly determined by the device. Any skeletal pose provided by
+		// the device is estimated by assuming the position required to active buttons, triggers, joysticks,
+		// or other input sensors.
+		// E.g. Vive Controller, Gamepad
+		VRSkeletalTracking_Estimated = 0,
+
+		// body part location can be measured directly but with fewer degrees of freedom than the actual body
+		// part. Certain body part positions may be unmeasured by the device and estimated from other input data.
+		// E.g. Index Controllers, gloves that only measure finger curl
+		VRSkeletalTracking_Partial = 1,
+
+		// Body part location can be measured directly throughout the entire range of motion of the body part.
+		// E.g. Mocap suit for the full body, gloves that measure rotation of each finger segment
+		VRSkeletalTracking_Full = 2,
+
+		VRSkeletalTrackingLevel_Count,
+		VRSkeletalTrackingLevel_Max = VRSkeletalTrackingLevel_Count - 1
+	};
+
+	/** Type used for referring to bones by their index */
+	typedef int32_t BoneIndex_t;
+	const BoneIndex_t k_unInvalidBoneIndex = -1;
+
+	/** error codes returned by Vr_Init */
+
+	// Please add adequate error description to https://developer.valvesoftware.com/w/index.php?title=Category:SteamVRHelp
+	enum EVRInitError
+	{
+		VRInitError_None = 0,
+		VRInitError_Unknown = 1,
+
+		VRInitError_Init_InstallationNotFound = 100,
+		VRInitError_Init_InstallationCorrupt = 101,
+		VRInitError_Init_VRClientDLLNotFound = 102,
+		VRInitError_Init_FileNotFound = 103,
+		VRInitError_Init_FactoryNotFound = 104,
+		VRInitError_Init_InterfaceNotFound = 105,
+		VRInitError_Init_InvalidInterface = 106,
+		VRInitError_Init_UserConfigDirectoryInvalid = 107,
+		VRInitError_Init_HmdNotFound = 108,
+		VRInitError_Init_NotInitialized = 109,
+		VRInitError_Init_PathRegistryNotFound = 110,
+		VRInitError_Init_NoConfigPath = 111,
+		VRInitError_Init_NoLogPath = 112,
+		VRInitError_Init_PathRegistryNotWritable = 113,
+		VRInitError_Init_AppInfoInitFailed = 114,
+		VRInitError_Init_Retry = 115,			   // Used internally to cause retries to vrserver
+		VRInitError_Init_InitCanceledByUser = 116, // The calling application should silently exit. The user canceled app startup
+		VRInitError_Init_AnotherAppLaunching = 117,
+		VRInitError_Init_SettingsInitFailed = 118,
+		VRInitError_Init_ShuttingDown = 119,
+		VRInitError_Init_TooManyObjects = 120,
+		VRInitError_Init_NoServerForBackgroundApp = 121,
+		VRInitError_Init_NotSupportedWithCompositor = 122,
+		VRInitError_Init_NotAvailableToUtilityApps = 123,
+		VRInitError_Init_Internal = 124,
+		VRInitError_Init_HmdDriverIdIsNone = 125,
+		VRInitError_Init_HmdNotFoundPresenceFailed = 126,
+		VRInitError_Init_VRMonitorNotFound = 127,
+		VRInitError_Init_VRMonitorStartupFailed = 128,
+		VRInitError_Init_LowPowerWatchdogNotSupported = 129,
+		VRInitError_Init_InvalidApplicationType = 130,
+		VRInitError_Init_NotAvailableToWatchdogApps = 131,
+		VRInitError_Init_WatchdogDisabledInSettings = 132,
+		VRInitError_Init_VRDashboardNotFound = 133,
+		VRInitError_Init_VRDashboardStartupFailed = 134,
+		VRInitError_Init_VRHomeNotFound = 135,
+		VRInitError_Init_VRHomeStartupFailed = 136,
+		VRInitError_Init_RebootingBusy = 137,
+		VRInitError_Init_FirmwareUpdateBusy = 138,
+		VRInitError_Init_FirmwareRecoveryBusy = 139,
+		VRInitError_Init_USBServiceBusy = 140,
+		VRInitError_Init_VRWebHelperStartupFailed = 141,
+		VRInitError_Init_TrackerManagerInitFailed = 142,
+		VRInitError_Init_AlreadyRunning = 143,
+		VRInitError_Init_FailedForVrMonitor = 144,
+		VRInitError_Init_PropertyManagerInitFailed = 145,
+		VRInitError_Init_WebServerFailed = 146,
+		VRInitError_Init_IllegalTypeTransition = 147,
+		VRInitError_Init_MismatchedRuntimes = 148,
+		VRInitError_Init_InvalidProcessId = 149,
+		VRInitError_Init_VRServiceStartupFailed = 150,
+		VRInitError_Init_PrismNeedsNewDrivers = 151,
+		VRInitError_Init_PrismStartupTimedOut = 152,
+		VRInitError_Init_CouldNotStartPrism = 153,
+		VRInitError_Init_PrismClientInitFailed = 154,
+		VRInitError_Init_PrismClientStartFailed = 155,
+		VRInitError_Init_PrismExitedUnexpectedly = 156,
+		VRInitError_Init_BadLuid = 157,
+		VRInitError_Init_NoServerForAppContainer = 158,
+		VRInitError_Init_DuplicateBootstrapper = 159,
+		VRInitError_Init_VRDashboardServicePending = 160,
+		VRInitError_Init_VRDashboardServiceTimeout = 161,
+		VRInitError_Init_VRDashboardServiceStopped = 162,
+		VRInitError_Init_VRDashboardAlreadyStarted = 163,
+		VRInitError_Init_VRDashboardCopyFailed = 164,
+		VRInitError_Init_VRDashboardTokenFailure = 165,
+		VRInitError_Init_VRDashboardEnvironmentFailure = 166,
+		VRInitError_Init_VRDashboardPathFailure = 167,
+
+		VRInitError_Driver_Failed = 200,
+		VRInitError_Driver_Unknown = 201,
+		VRInitError_Driver_HmdUnknown = 202,
+		VRInitError_Driver_NotLoaded = 203,
+		VRInitError_Driver_RuntimeOutOfDate = 204,
+		VRInitError_Driver_HmdInUse = 205,
+		VRInitError_Driver_NotCalibrated = 206,
+		VRInitError_Driver_CalibrationInvalid = 207,
+		VRInitError_Driver_HmdDisplayNotFound = 208,
+		VRInitError_Driver_TrackedDeviceInterfaceUnknown = 209,
+		// VRInitError_Driver_HmdDisplayNotFoundAfterFix = 210, // not needed: here for historic reasons
+		VRInitError_Driver_HmdDriverIdOutOfBounds = 211,
+		VRInitError_Driver_HmdDisplayMirrored = 212,
+		VRInitError_Driver_HmdDisplayNotFoundLaptop = 213,
+		VRInitError_Driver_PeerDriverNotInstalled = 214,
+		VRInitError_Driver_WirelessHmdNotConnected = 215,
+
+		// Never make error 259 because we return it from main and it would conflict with STILL_ACTIVE
+
+		VRInitError_IPC_ServerInitFailed = 300,
+		VRInitError_IPC_ConnectFailed = 301,
+		VRInitError_IPC_SharedStateInitFailed = 302,
+		VRInitError_IPC_CompositorInitFailed = 303,
+		VRInitError_IPC_MutexInitFailed = 304,
+		VRInitError_IPC_Failed = 305,
+		VRInitError_IPC_CompositorConnectFailed = 306,
+		VRInitError_IPC_CompositorInvalidConnectResponse = 307,
+		VRInitError_IPC_ConnectFailedAfterMultipleAttempts = 308,
+		VRInitError_IPC_ConnectFailedAfterTargetExited = 309,
+		VRInitError_IPC_NamespaceUnavailable = 310,
+
+		VRInitError_Compositor_Failed = 400,
+		VRInitError_Compositor_D3D11HardwareRequired = 401,
+		VRInitError_Compositor_FirmwareRequiresUpdate = 402,
+		VRInitError_Compositor_OverlayInitFailed = 403,
+		VRInitError_Compositor_ScreenshotsInitFailed = 404,
+		VRInitError_Compositor_UnableToCreateDevice = 405,
+		VRInitError_Compositor_SharedStateIsNull = 406,
+		VRInitError_Compositor_NotificationManagerIsNull = 407,
+		VRInitError_Compositor_ResourceManagerClientIsNull = 408,
+		VRInitError_Compositor_MessageOverlaySharedStateInitFailure = 409,
+		VRInitError_Compositor_PropertiesInterfaceIsNull = 410,
+		VRInitError_Compositor_CreateFullscreenWindowFailed = 411,
+		VRInitError_Compositor_SettingsInterfaceIsNull = 412,
+		VRInitError_Compositor_FailedToShowWindow = 413,
+		VRInitError_Compositor_DistortInterfaceIsNull = 414,
+		VRInitError_Compositor_DisplayFrequencyFailure = 415,
+		VRInitError_Compositor_RendererInitializationFailed = 416,
+		VRInitError_Compositor_DXGIFactoryInterfaceIsNull = 417,
+		VRInitError_Compositor_DXGIFactoryCreateFailed = 418,
+		VRInitError_Compositor_DXGIFactoryQueryFailed = 419,
+		VRInitError_Compositor_InvalidAdapterDesktop = 420,
+		VRInitError_Compositor_InvalidHmdAttachment = 421,
+		VRInitError_Compositor_InvalidOutputDesktop = 422,
+		VRInitError_Compositor_InvalidDeviceProvided = 423,
+		VRInitError_Compositor_D3D11RendererInitializationFailed = 424,
+		VRInitError_Compositor_FailedToFindDisplayMode = 425,
+		VRInitError_Compositor_FailedToCreateSwapChain = 426,
+		VRInitError_Compositor_FailedToGetBackBuffer = 427,
+		VRInitError_Compositor_FailedToCreateRenderTarget = 428,
+		VRInitError_Compositor_FailedToCreateDXGI2SwapChain = 429,
+		VRInitError_Compositor_FailedtoGetDXGI2BackBuffer = 430,
+		VRInitError_Compositor_FailedToCreateDXGI2RenderTarget = 431,
+		VRInitError_Compositor_FailedToGetDXGIDeviceInterface = 432,
+		VRInitError_Compositor_SelectDisplayMode = 433,
+		VRInitError_Compositor_FailedToCreateNvAPIRenderTargets = 434,
+		VRInitError_Compositor_NvAPISetDisplayMode = 435,
+		VRInitError_Compositor_FailedToCreateDirectModeDisplay = 436,
+		VRInitError_Compositor_InvalidHmdPropertyContainer = 437,
+		VRInitError_Compositor_UpdateDisplayFrequency = 438,
+		VRInitError_Compositor_CreateRasterizerState = 439,
+		VRInitError_Compositor_CreateWireframeRasterizerState = 440,
+		VRInitError_Compositor_CreateSamplerState = 441,
+		VRInitError_Compositor_CreateClampToBorderSamplerState = 442,
+		VRInitError_Compositor_CreateAnisoSamplerState = 443,
+		VRInitError_Compositor_CreateOverlaySamplerState = 444,
+		VRInitError_Compositor_CreatePanoramaSamplerState = 445,
+		VRInitError_Compositor_CreateFontSamplerState = 446,
+		VRInitError_Compositor_CreateNoBlendState = 447,
+		VRInitError_Compositor_CreateBlendState = 448,
+		VRInitError_Compositor_CreateAlphaBlendState = 449,
+		VRInitError_Compositor_CreateBlendStateMaskR = 450,
+		VRInitError_Compositor_CreateBlendStateMaskG = 451,
+		VRInitError_Compositor_CreateBlendStateMaskB = 452,
+		VRInitError_Compositor_CreateDepthStencilState = 453,
+		VRInitError_Compositor_CreateDepthStencilStateNoWrite = 454,
+		VRInitError_Compositor_CreateDepthStencilStateNoDepth = 455,
+		VRInitError_Compositor_CreateFlushTexture = 456,
+		VRInitError_Compositor_CreateDistortionSurfaces = 457,
+		VRInitError_Compositor_CreateConstantBuffer = 458,
+		VRInitError_Compositor_CreateHmdPoseConstantBuffer = 459,
+		VRInitError_Compositor_CreateHmdPoseStagingConstantBuffer = 460,
+		VRInitError_Compositor_CreateSharedFrameInfoConstantBuffer = 461,
+		VRInitError_Compositor_CreateOverlayConstantBuffer = 462,
+		VRInitError_Compositor_CreateSceneTextureIndexConstantBuffer = 463,
+		VRInitError_Compositor_CreateReadableSceneTextureIndexConstantBuffer = 464,
+		VRInitError_Compositor_CreateLayerGraphicsTextureIndexConstantBuffer = 465,
+		VRInitError_Compositor_CreateLayerComputeTextureIndexConstantBuffer = 466,
+		VRInitError_Compositor_CreateLayerComputeSceneTextureIndexConstantBuffer = 467,
+		VRInitError_Compositor_CreateComputeHmdPoseConstantBuffer = 468,
+		VRInitError_Compositor_CreateGeomConstantBuffer = 469,
+		VRInitError_Compositor_CreatePanelMaskConstantBuffer = 470,
+		VRInitError_Compositor_CreatePixelSimUBO = 471,
+		VRInitError_Compositor_CreateMSAARenderTextures = 472,
+		VRInitError_Compositor_CreateResolveRenderTextures = 473,
+		VRInitError_Compositor_CreateComputeResolveRenderTextures = 474,
+		VRInitError_Compositor_CreateDriverDirectModeResolveTextures = 475,
+		VRInitError_Compositor_OpenDriverDirectModeResolveTextures = 476,
+		VRInitError_Compositor_CreateFallbackSyncTexture = 477,
+		VRInitError_Compositor_ShareFallbackSyncTexture = 478,
+		VRInitError_Compositor_CreateOverlayIndexBuffer = 479,
+		VRInitError_Compositor_CreateOverlayVertexBuffer = 480,
+		VRInitError_Compositor_CreateTextVertexBuffer = 481,
+		VRInitError_Compositor_CreateTextIndexBuffer = 482,
+		VRInitError_Compositor_CreateMirrorTextures = 483,
+		VRInitError_Compositor_CreateLastFrameRenderTexture = 484,
+		VRInitError_Compositor_CreateMirrorOverlay = 485,
+		VRInitError_Compositor_FailedToCreateVirtualDisplayBackbuffer = 486,
+		VRInitError_Compositor_DisplayModeNotSupported = 487,
+		VRInitError_Compositor_CreateOverlayInvalidCall = 488,
+		VRInitError_Compositor_CreateOverlayAlreadyInitialized = 489,
+		VRInitError_Compositor_FailedToCreateMailbox = 490,
+		VRInitError_Compositor_WindowInterfaceIsNull = 491,
+		VRInitError_Compositor_SystemLayerCreateInstance = 492,
+		VRInitError_Compositor_SystemLayerCreateSession = 493,
+		VRInitError_Compositor_CreateInverseDistortUVs = 494,
+		VRInitError_Compositor_CreateBackbufferDepth = 495,
+
+		VRInitError_VendorSpecific_UnableToConnectToOculusRuntime = 1000,
+		VRInitError_VendorSpecific_WindowsNotInDevMode = 1001,
+		VRInitError_VendorSpecific_OculusLinkNotEnabled = 1002,
+
+		VRInitError_VendorSpecific_HmdFound_CantOpenDevice = 1101,
+		VRInitError_VendorSpecific_HmdFound_UnableToRequestConfigStart = 1102,
+		VRInitError_VendorSpecific_HmdFound_NoStoredConfig = 1103,
+		VRInitError_VendorSpecific_HmdFound_ConfigTooBig = 1104,
+		VRInitError_VendorSpecific_HmdFound_ConfigTooSmall = 1105,
+		VRInitError_VendorSpecific_HmdFound_UnableToInitZLib = 1106,
+		VRInitError_VendorSpecific_HmdFound_CantReadFirmwareVersion = 1107,
+		VRInitError_VendorSpecific_HmdFound_UnableToSendUserDataStart = 1108,
+		VRInitError_VendorSpecific_HmdFound_UnableToGetUserDataStart = 1109,
+		VRInitError_VendorSpecific_HmdFound_UnableToGetUserDataNext = 1110,
+		VRInitError_VendorSpecific_HmdFound_UserDataAddressRange = 1111,
+		VRInitError_VendorSpecific_HmdFound_UserDataError = 1112,
+		VRInitError_VendorSpecific_HmdFound_ConfigFailedSanityCheck = 1113,
+		VRInitError_VendorSpecific_OculusRuntimeBadInstall = 1114,
+		VRInitError_VendorSpecific_HmdFound_UnexpectedConfiguration_1 = 1115,
+
+		VRInitError_Steam_SteamInstallationNotFound = 2000,
+
+		// Strictly a placeholder
+		VRInitError_LastError
+	};
+
+	enum EVRScreenshotType
+	{
+		VRScreenshotType_None = 0,
+		VRScreenshotType_Mono = 1, // left eye only
+		VRScreenshotType_Stereo = 2,
+		VRScreenshotType_Cubemap = 3,
+		VRScreenshotType_MonoPanorama = 4,
+		VRScreenshotType_StereoPanorama = 5
+	};
+
+	enum EVRScreenshotPropertyFilenames
+	{
+		VRScreenshotPropertyFilenames_Preview = 0,
+		VRScreenshotPropertyFilenames_VR = 1,
+	};
+
+	enum EVRTrackedCameraError
+	{
+		VRTrackedCameraError_None = 0,
+		VRTrackedCameraError_OperationFailed = 100,
+		VRTrackedCameraError_InvalidHandle = 101,
+		VRTrackedCameraError_InvalidFrameHeaderVersion = 102,
+		VRTrackedCameraError_OutOfHandles = 103,
+		VRTrackedCameraError_IPCFailure = 104,
+		VRTrackedCameraError_NotSupportedForThisDevice = 105,
+		VRTrackedCameraError_SharedMemoryFailure = 106,
+		VRTrackedCameraError_FrameBufferingFailure = 107,
+		VRTrackedCameraError_StreamSetupFailure = 108,
+		VRTrackedCameraError_InvalidGLTextureId = 109,
+		VRTrackedCameraError_InvalidSharedTextureHandle = 110,
+		VRTrackedCameraError_FailedToGetGLTextureId = 111,
+		VRTrackedCameraError_SharedTextureFailure = 112,
+		VRTrackedCameraError_NoFrameAvailable = 113,
+		VRTrackedCameraError_InvalidArgument = 114,
+		VRTrackedCameraError_InvalidFrameBufferSize = 115,
+	};
+
+	enum EVRTrackedCameraFrameLayout
+	{
+		EVRTrackedCameraFrameLayout_Mono = 0x0001,
+		EVRTrackedCameraFrameLayout_Stereo = 0x0002,
+		EVRTrackedCameraFrameLayout_VerticalLayout = 0x0010,   // Stereo frames are Top/Bottom (left/right)
+		EVRTrackedCameraFrameLayout_HorizontalLayout = 0x0020, // Stereo frames are Left/Right
+	};
+
+	enum EVRTrackedCameraFrameType
+	{
+		VRTrackedCameraFrameType_Distorted = 0,		 // This is the camera video frame size in pixels, still distorted.
+		VRTrackedCameraFrameType_Undistorted,		 // In pixels, an undistorted inscribed rectangle region without invalid regions. This size is subject to changes shortly.
+		VRTrackedCameraFrameType_MaximumUndistorted, // In pixels, maximum undistorted with invalid regions. Non zero alpha component identifies valid regions.
+		MAX_CAMERA_FRAME_TYPES
+	};
+
+	enum EVRDistortionFunctionType
+	{
+		VRDistortionFunctionType_None,
+		VRDistortionFunctionType_FTheta,
+		VRDistortionFunctionType_Extended_FTheta,
+		MAX_DISTORTION_FUNCTION_TYPES,
+	};
+
+	static const uint32_t k_unMaxDistortionFunctionParameters = 8;
+
+	typedef uint64_t TrackedCameraHandle_t;
+#define INVALID_TRACKED_CAMERA_HANDLE ((vr::TrackedCameraHandle_t)0)
+
+	struct CameraVideoStreamFrameHeader_t
+	{
+		EVRTrackedCameraFrameType eFrameType;
+
+		uint32_t nWidth;
+		uint32_t nHeight;
+		uint32_t nBytesPerPixel;
+
+		uint32_t nFrameSequence;
+
+		TrackedDevicePose_t trackedDevicePose;
+
+		uint64_t ulFrameExposureTime; // mid-point of the exposure of the image in host system ticks
+	};
+
+	// Screenshot types
+	typedef uint32_t ScreenshotHandle_t;
+
+	static const uint32_t k_unScreenshotHandleInvalid = 0;
+
+	/** Compositor frame timing reprojection flags. */
+	const uint32_t VRCompositor_ReprojectionReason_Cpu = 0x01;
+	const uint32_t VRCompositor_ReprojectionReason_Gpu = 0x02;
+	const uint32_t VRCompositor_ReprojectionAsync = 0x04; // This flag indicates the async reprojection mode is active,
+														  // but does not indicate if reprojection actually happened or not.
+														  // Use the ReprojectionReason flags above to check if reprojection
+														  // was actually applied (i.e. scene texture was reused).
+														  // NumFramePresents > 1 also indicates the scene texture was reused,
+														  // and also the number of times that it was presented in total.
+
+	const uint32_t VRCompositor_ReprojectionMotion = 0x08; // This flag indicates whether or not motion smoothing was triggered for this frame
+
+	const uint32_t VRCompositor_PredictionMask = 0xF0; // The runtime may predict more than one frame (up to four) ahead if
+													   // it detects the application is taking too long to render. These two
+													   // bits will contain the count of additional frames (normally zero).
+													   // Use the VR_COMPOSITOR_ADDITIONAL_PREDICTED_FRAMES macro to read from
+													   // the latest frame timing entry.
+
+	const uint32_t VRCompositor_ThrottleMask = 0xF00; // Number of frames the compositor is throttling the application.
+													  // Use the VR_COMPOSITOR_NUMBER_OF_THROTTLED_FRAMES macro to read from
+													  // the latest frame timing entry.
+
+#define VR_COMPOSITOR_ADDITIONAL_PREDICTED_FRAMES(timing) (((timing).m_nReprojectionFlags & vr::VRCompositor_PredictionMask) >> 4)
+#define VR_COMPOSITOR_NUMBER_OF_THROTTLED_FRAMES(timing) (((timing).m_nReprojectionFlags & vr::VRCompositor_ThrottleMask) >> 8)
+
+	/** Provides a single frame's timing information to the app */
+	struct Compositor_FrameTiming
+	{
+		uint32_t m_nSize; // Set to sizeof( Compositor_FrameTiming )
+		uint32_t m_nFrameIndex;
+		uint32_t m_nNumFramePresents; // number of times this frame was presented
+		uint32_t m_nNumMisPresented;  // number of times this frame was presented on a vsync other than it was originally predicted to
+		uint32_t m_nNumDroppedFrames; // number of additional times previous frame was scanned out
+		uint32_t m_nReprojectionFlags;
+
+		/** Absolute time reference for comparing frames.  This aligns with the vsync that running start is relative to. */
+		double m_flSystemTimeInSeconds;
+
+		/** These times may include work from other processes due to OS scheduling.
+		 * The fewer packets of work these are broken up into, the less likely this will happen.
+		 * GPU work can be broken up by calling Flush.  This can sometimes be useful to get the GPU started
+		 * processing that work earlier in the frame. */
+		float m_flPreSubmitGpuMs;		 // time spent rendering the scene (gpu work submitted between WaitGetPoses and second Submit)
+		float m_flPostSubmitGpuMs;		 // additional time spent rendering by application (e.g. companion window)
+		float m_flTotalRenderGpuMs;		 // time between work submitted immediately after present (ideally vsync) until the end of compositor submitted work
+		float m_flCompositorRenderGpuMs; // time spend performing distortion correction, rendering chaperone, overlays, etc.
+		float m_flCompositorRenderCpuMs; // time spent on cpu submitting the above work for this frame
+		float m_flCompositorIdleCpuMs;	 // time spent waiting for running start (application could have used this much more time)
+
+		/** Miscellaneous measured intervals. */
+		float m_flClientFrameIntervalMs; // time between calls to WaitGetPoses
+		float m_flPresentCallCpuMs;		 // time blocked on call to present (usually 0.0, but can go long)
+		float m_flWaitForPresentCpuMs;	 // time spent spin-waiting for frame index to change (not near-zero indicates wait object failure)
+		float m_flSubmitFrameMs;		 // time spent in IVRCompositor::Submit (not near-zero indicates driver issue)
+
+		/** The following are all relative to this frame's SystemTimeInSeconds */
+		float m_flWaitGetPosesCalledMs;
+		float m_flNewPosesReadyMs;
+		float m_flNewFrameReadyMs; // second call to IVRCompositor::Submit
+		float m_flCompositorUpdateStartMs;
+		float m_flCompositorUpdateEndMs;
+		float m_flCompositorRenderStartMs;
+
+		vr::TrackedDevicePose_t m_HmdPose; // pose used by app to render this frame
+
+		uint32_t m_nNumVSyncsReadyForUse;
+		uint32_t m_nNumVSyncsToFirstView;
+	};
+
+	/** Provides compositor benchmark results to the app */
+	struct Compositor_BenchmarkResults
+	{
+		float m_flMegaPixelsPerSecond;				 // Measurement of GPU MP/s performed by compositor benchmark
+		float m_flHmdRecommendedMegaPixelsPerSecond; // Recommended default MP/s given the HMD resolution, refresh, and panel mask.
+	};
+
+	/** Frame timing data provided by direct mode drivers. */
+	struct DriverDirectMode_FrameTiming
+	{
+		uint32_t m_nSize;			  // Set to sizeof( DriverDirectMode_FrameTiming )
+		uint32_t m_nNumFramePresents; // number of times frame was presented
+		uint32_t m_nNumMisPresented;  // number of times frame was presented on a vsync other than it was originally predicted to
+		uint32_t m_nNumDroppedFrames; // number of additional times previous frame was scanned out (i.e. compositor missed vsync)
+		uint32_t m_nReprojectionFlags;
+	};
+
+	/** These flags will be set on DriverDirectMode_FrameTiming::m_nReprojectionFlags when IVRDriverDirectModeComponent::GetFrameTiming is called for drivers to optionally respond to. */
+	const uint32_t VRCompositor_ReprojectionMotion_Enabled = 0x100;		 // Motion Smoothing is enabled in the UI for the currently running application
+	const uint32_t VRCompositor_ReprojectionMotion_ForcedOn = 0x200;	 // Motion Smoothing is forced on in the UI for the currently running application
+	const uint32_t VRCompositor_ReprojectionMotion_AppThrottled = 0x400; // Application is requesting throttling via ForceInterleavedReprojectionOn
+
+	enum EVSync
+	{
+		VSync_None,
+		VSync_WaitRender,	// block following render work until vsync
+		VSync_NoWaitRender, // do not block following render work (allow to get started early)
+	};
+
+	enum EVRMuraCorrectionMode
+	{
+		EVRMuraCorrectionMode_Default = 0,
+		EVRMuraCorrectionMode_NoCorrection
+	};
+
+	/** raw IMU data provided by IVRIOBuffer from paths to tracked devices with IMUs */
+	enum Imu_OffScaleFlags
+	{
+		OffScale_AccelX = 0x01,
+		OffScale_AccelY = 0x02,
+		OffScale_AccelZ = 0x04,
+		OffScale_GyroX = 0x08,
+		OffScale_GyroY = 0x10,
+		OffScale_GyroZ = 0x20,
+	};
+
+	struct ImuSample_t
+	{
+		double fSampleTime;
+		HmdVector3d_t vAccel;
+		HmdVector3d_t vGyro;
+		uint32_t unOffScaleFlags;
+	};
+
+#pragma pack(pop)
+
+// figure out how to import from the VR API dll
+#if defined(_WIN32)
+
+#if !defined(OPENVR_BUILD_STATIC)
+#ifdef VR_API_EXPORT
+#define VR_INTERFACE extern "C" __declspec(dllexport)
+#else
+#define VR_INTERFACE extern "C" __declspec(dllimport)
+#endif
+#else
+#define VR_INTERFACE extern "C"
+#endif
+
+#elif defined(__GNUC__) || defined(COMPILER_GCC) || defined(__APPLE__)
+
+#ifdef VR_API_EXPORT
+#define VR_INTERFACE extern "C" __attribute__((visibility("default")))
+#else
+#define VR_INTERFACE extern "C"
+#endif
+
+#else
+#error "Unsupported Platform."
+#endif
+
+#if defined(_WIN32)
+#define VR_CALLTYPE __cdecl
+#else
+#define VR_CALLTYPE
+#endif
+
+} // namespace vr
+#endif // _INCLUDE_VRTYPES_H
+
+// vrannotation.h
+
+#ifdef API_GEN
+#define VR_CLANG_ATTR(ATTR) __attribute__((annotate(ATTR)))
+#else
+#define VR_CLANG_ATTR(ATTR)
+#endif
+
+#define VR_METHOD_DESC(DESC) VR_CLANG_ATTR("desc:" #DESC ";")
+#define VR_IGNOREATTR() VR_CLANG_ATTR("ignore")
+#define VR_OUT_STRUCT() VR_CLANG_ATTR("out_struct: ;")
+#define VR_OUT_STRING() VR_CLANG_ATTR("out_string: ;")
+#define VR_OUT_ARRAY_CALL(COUNTER, FUNCTION, PARAMS) VR_CLANG_ATTR("out_array_call:" #COUNTER "," #FUNCTION "," #PARAMS ";")
+#define VR_OUT_ARRAY_COUNT(COUNTER) VR_CLANG_ATTR("out_array_count:" #COUNTER ";")
+#define VR_ARRAY_COUNT(COUNTER) VR_CLANG_ATTR("array_count:" #COUNTER ";")
+#define VR_ARRAY_COUNT_D(COUNTER, DESC) VR_CLANG_ATTR("array_count:" #COUNTER ";desc:" #DESC)
+#define VR_BUFFER_COUNT(COUNTER) VR_CLANG_ATTR("buffer_count:" #COUNTER ";")
+#define VR_OUT_BUFFER_COUNT(COUNTER) VR_CLANG_ATTR("out_buffer_count:" #COUNTER ";")
+#define VR_OUT_STRING_COUNT(COUNTER) VR_CLANG_ATTR("out_string_count:" #COUNTER ";")
+
+// ivrsystem.h
+
+namespace vr
+{
+
+	class IVRSystem
+	{
+	public:
+		// ------------------------------------
+		// Display Methods
+		// ------------------------------------
+
+		/** Suggested size for the intermediate render target that the distortion pulls from. */
+		virtual void GetRecommendedRenderTargetSize(uint32_t *pnWidth, uint32_t *pnHeight) = 0;
+
+		/** The projection matrix for the specified eye */
+		virtual HmdMatrix44_t GetProjectionMatrix(EVREye eEye, float fNearZ, float fFarZ) = 0;
+
+		/** The components necessary to build your own projection matrix in case your
+		 * application is doing something fancy like infinite Z */
+		virtual void GetProjectionRaw(EVREye eEye, float *pfLeft, float *pfRight, float *pfTop, float *pfBottom) = 0;
+
+		/** Gets the result of the distortion function for the specified eye and input UVs. UVs go from 0,0 in
+		 * the upper left of that eye's viewport and 1,1 in the lower right of that eye's viewport.
+		 * Returns true for success. Otherwise, returns false, and distortion coordinates are not suitable. */
+		virtual bool ComputeDistortion(EVREye eEye, float fU, float fV, DistortionCoordinates_t *pDistortionCoordinates) = 0;
+
+		/** Returns the transform from eye space to the head space. Eye space is the per-eye flavor of head
+		 * space that provides stereo disparity. Instead of Model * View * Projection the sequence is Model * View * Eye^-1 * Projection.
+		 * Normally View and Eye^-1 will be multiplied together and treated as View in your application.
+		 */
+		virtual HmdMatrix34_t GetEyeToHeadTransform(EVREye eEye) = 0;
+
+		/** Returns the number of elapsed seconds since the last recorded vsync event. This
+		 *	will come from a vsync timer event in the timer if possible or from the application-reported
+		 *   time if that is not available. If no vsync times are available the function will
+		 *   return zero for vsync time and frame counter and return false from the method. */
+		virtual bool GetTimeSinceLastVsync(float *pfSecondsSinceLastVsync, uint64_t *pulFrameCounter) = 0;
+
+		/** [D3D9 Only]
+		 * Returns the adapter index that the user should pass into CreateDevice to set up D3D9 in such
+		 * a way that it can go full screen exclusive on the HMD. Returns -1 if there was an error.
+		 */
+		virtual int32_t GetD3D9AdapterIndex() = 0;
+
+		/** [D3D10/11 Only]
+		 * Returns the adapter index that the user should pass into EnumAdapters to create the device
+		 * and swap chain in DX10 and DX11. If an error occurs the index will be set to -1.
+		 */
+		virtual void GetDXGIOutputInfo(int32_t *pnAdapterIndex) = 0;
+
+		/**
+		 * Returns platform- and texture-type specific adapter identification so that applications and the
+		 * compositor are creating textures and swap chains on the same GPU. If an error occurs the device
+		 * will be set to 0.
+		 * pInstance is an optional parameter that is required only when textureType is TextureType_Vulkan.
+		 * [D3D10/11/12 Only (D3D9 Not Supported)]
+		 *  Returns the adapter LUID that identifies the GPU attached to the HMD. The user should
+		 *  enumerate all adapters using IDXGIFactory::EnumAdapters and IDXGIAdapter::GetDesc to find
+		 *  the adapter with the matching LUID, or use IDXGIFactory4::EnumAdapterByLuid.
+		 *  The discovered IDXGIAdapter should be used to create the device and swap chain.
+		 * [Vulkan Only]
+		 *  Returns the VkPhysicalDevice that should be used by the application.
+		 *  pInstance must be the instance the application will use to query for the VkPhysicalDevice.  The application
+		 *  must create the VkInstance with extensions returned by IVRCompositor::GetVulkanInstanceExtensionsRequired enabled.
+		 * [macOS Only]
+		 *  For TextureType_IOSurface returns the id<MTLDevice> that should be used by the application.
+		 *  On 10.13+ for TextureType_OpenGL returns the 'registryId' of the renderer which should be used
+		 *   by the application. See Apple Technical Q&A QA1168 for information on enumerating GL Renderers, and the
+		 *   new kCGLRPRegistryIDLow and kCGLRPRegistryIDHigh CGLRendererProperty values in the 10.13 SDK.
+		 *  Pre 10.13 for TextureType_OpenGL returns 0, as there is no dependable way to correlate the HMDs MTLDevice
+		 *   with a GL Renderer.
+		 */
+		virtual void GetOutputDevice(uint64_t *pnDevice, ETextureType textureType, VkInstance_T *pInstance = nullptr) = 0;
+
+		// ------------------------------------
+		// Display Mode methods
+		// ------------------------------------
+
+		/** Use to determine if the headset display is part of the desktop (i.e. extended) or hidden (i.e. direct mode). */
+		virtual bool IsDisplayOnDesktop() = 0;
+
+		/** Set the display visibility (true = extended, false = direct mode).  Return value of true indicates that the change was successful. */
+		virtual bool SetDisplayVisibility(bool bIsVisibleOnDesktop) = 0;
+
+		// ------------------------------------
+		// Tracking Methods
+		// ------------------------------------
+
+		/** The pose that the tracker thinks that the HMD will be in at the specified number of seconds into the
+		 * future. Pass 0 to get the state at the instant the method is called. Most of the time the application should
+		 * calculate the time until the photons will be emitted from the display and pass that time into the method.
+		 *
+		 * This is roughly analogous to the inverse of the view matrix in most applications, though
+		 * many games will need to do some additional rotation or translation on top of the rotation
+		 * and translation provided by the head pose.
+		 *
+		 * For devices where bPoseIsValid is true the application can use the pose to position the device
+		 * in question. The provided array can be any size up to k_unMaxTrackedDeviceCount.
+		 *
+		 * Seated experiences should call this method with TrackingUniverseSeated and receive poses relative
+		 * to the seated zero pose. Standing experiences should call this method with TrackingUniverseStanding
+		 * and receive poses relative to the Chaperone Play Area. TrackingUniverseRawAndUncalibrated should
+		 * probably not be used unless the application is the Chaperone calibration tool itself, but will provide
+		 * poses relative to the hardware-specific coordinate system in the driver.
+		 */
+		virtual void GetDeviceToAbsoluteTrackingPose(ETrackingUniverseOrigin eOrigin, float fPredictedSecondsToPhotonsFromNow, VR_ARRAY_COUNT(unTrackedDevicePoseArrayCount) TrackedDevicePose_t *pTrackedDevicePoseArray, uint32_t unTrackedDevicePoseArrayCount) = 0;
+
+		/** Returns the transform from the seated zero pose to the standing absolute tracking system. This allows
+		 * applications to represent the seated origin to used or transform object positions from one coordinate
+		 * system to the other.
+		 *
+		 * The seated origin may or may not be inside the Play Area or Collision Bounds returned by IVRChaperone. Its position
+		 * depends on what the user has set from the Dashboard settings and previous calls to ResetSeatedZeroPose. */
+		virtual HmdMatrix34_t GetSeatedZeroPoseToStandingAbsoluteTrackingPose() = 0;
+
+		/** Returns the transform from the tracking origin to the standing absolute tracking system. This allows
+		 * applications to convert from raw tracking space to the calibrated standing coordinate system. */
+		virtual HmdMatrix34_t GetRawZeroPoseToStandingAbsoluteTrackingPose() = 0;
+
+		/** Get a sorted array of device indices of a given class of tracked devices (e.g. controllers).  Devices are sorted right to left
+		 * relative to the specified tracked device (default: hmd -- pass in -1 for absolute tracking space).  Returns the number of devices
+		 * in the list, or the size of the array needed if not large enough. */
+		virtual uint32_t GetSortedTrackedDeviceIndicesOfClass(ETrackedDeviceClass eTrackedDeviceClass, VR_ARRAY_COUNT(unTrackedDeviceIndexArrayCount) vr::TrackedDeviceIndex_t *punTrackedDeviceIndexArray, uint32_t unTrackedDeviceIndexArrayCount, vr::TrackedDeviceIndex_t unRelativeToTrackedDeviceIndex = k_unTrackedDeviceIndex_Hmd) = 0;
+
+		/** Returns the level of activity on the device. */
+		virtual EDeviceActivityLevel GetTrackedDeviceActivityLevel(vr::TrackedDeviceIndex_t unDeviceId) = 0;
+
+		/** Convenience utility to apply the specified transform to the specified pose.
+		 *   This properly transforms all pose components, including velocity and angular velocity
+		 */
+		virtual void ApplyTransform(TrackedDevicePose_t *pOutputPose, const TrackedDevicePose_t *pTrackedDevicePose, const HmdMatrix34_t *pTransform) = 0;
+
+		/** Returns the device index associated with a specific role, for example the left hand or the right hand. This function is deprecated in favor of the new IVRInput system. */
+		virtual vr::TrackedDeviceIndex_t GetTrackedDeviceIndexForControllerRole(vr::ETrackedControllerRole unDeviceType) = 0;
+
+		/** Returns the controller type associated with a device index. This function is deprecated in favor of the new IVRInput system. */
+		virtual vr::ETrackedControllerRole GetControllerRoleForTrackedDeviceIndex(vr::TrackedDeviceIndex_t unDeviceIndex) = 0;
+
+		// ------------------------------------
+		// Property methods
+		// ------------------------------------
+
+		/** Returns the device class of a tracked device. If there has not been a device connected in this slot
+		 * since the application started this function will return TrackedDevice_Invalid. For previous detected
+		 * devices the function will return the previously observed device class.
+		 *
+		 * To determine which devices exist on the system, just loop from 0 to k_unMaxTrackedDeviceCount and check
+		 * the device class. Every device with something other than TrackedDevice_Invalid is associated with an
+		 * actual tracked device. */
+		virtual ETrackedDeviceClass GetTrackedDeviceClass(vr::TrackedDeviceIndex_t unDeviceIndex) = 0;
+
+		/** Returns true if there is a device connected in this slot. */
+		virtual bool IsTrackedDeviceConnected(vr::TrackedDeviceIndex_t unDeviceIndex) = 0;
+
+		/** Returns a bool property. If the device index is not valid or the property is not a bool type this function will return false. */
+		virtual bool GetBoolTrackedDeviceProperty(vr::TrackedDeviceIndex_t unDeviceIndex, ETrackedDeviceProperty prop, ETrackedPropertyError *pError = 0L) = 0;
+
+		/** Returns a float property. If the device index is not valid or the property is not a float type this function will return 0. */
+		virtual float GetFloatTrackedDeviceProperty(vr::TrackedDeviceIndex_t unDeviceIndex, ETrackedDeviceProperty prop, ETrackedPropertyError *pError = 0L) = 0;
+
+		/** Returns an int property. If the device index is not valid or the property is not a int type this function will return 0. */
+		virtual int32_t GetInt32TrackedDeviceProperty(vr::TrackedDeviceIndex_t unDeviceIndex, ETrackedDeviceProperty prop, ETrackedPropertyError *pError = 0L) = 0;
+
+		/** Returns a uint64 property. If the device index is not valid or the property is not a uint64 type this function will return 0. */
+		virtual uint64_t GetUint64TrackedDeviceProperty(vr::TrackedDeviceIndex_t unDeviceIndex, ETrackedDeviceProperty prop, ETrackedPropertyError *pError = 0L) = 0;
+
+		/** Returns a matrix property. If the device index is not valid or the property is not a matrix type, this function will return identity. */
+		virtual HmdMatrix34_t GetMatrix34TrackedDeviceProperty(vr::TrackedDeviceIndex_t unDeviceIndex, ETrackedDeviceProperty prop, ETrackedPropertyError *pError = 0L) = 0;
+
+		/** Returns an array of one type of property. If the device index is not valid or the property is not a single value or an array of the specified type,
+		 * this function will return 0. Otherwise it returns the number of bytes necessary to hold the array of properties. If unBufferSize is
+		 * greater than the returned size and pBuffer is non-NULL, pBuffer is filled with the contents of array of properties. */
+		virtual uint32_t GetArrayTrackedDeviceProperty(vr::TrackedDeviceIndex_t unDeviceIndex, ETrackedDeviceProperty prop, PropertyTypeTag_t propType, void *pBuffer, uint32_t unBufferSize, ETrackedPropertyError *pError = 0L) = 0;
+
+		/** Returns a string property. If the device index is not valid or the property is not a string type this function will
+		 * return 0. Otherwise it returns the length of the number of bytes necessary to hold this string including the trailing
+		 * null. Strings will always fit in buffers of k_unMaxPropertyStringSize characters. */
+		virtual uint32_t GetStringTrackedDeviceProperty(vr::TrackedDeviceIndex_t unDeviceIndex, ETrackedDeviceProperty prop, VR_OUT_STRING() char *pchValue, uint32_t unBufferSize, ETrackedPropertyError *pError = 0L) = 0;
+
+		/** returns a string that corresponds with the specified property error. The string will be the name
+		 * of the error enum value for all valid error codes */
+		virtual const char *GetPropErrorNameFromEnum(ETrackedPropertyError error) = 0;
+
+		// ------------------------------------
+		// Event methods
+		// ------------------------------------
+
+		/** Returns true and fills the event with the next event on the queue if there is one. If there are no events
+		 * this method returns false. uncbVREvent should be the size in bytes of the VREvent_t struct */
+		virtual bool PollNextEvent(VREvent_t *pEvent, uint32_t uncbVREvent) = 0;
+
+		/** Returns true and fills the event with the next event on the queue if there is one. If there are no events
+		* this method returns false. Fills in the pose of the associated tracked device in the provided pose struct.
+		* This pose will always be older than the call to this function and should not be used to render the device.
+		uncbVREvent should be the size in bytes of the VREvent_t struct */
+		virtual bool PollNextEventWithPose(ETrackingUniverseOrigin eOrigin, VREvent_t *pEvent, uint32_t uncbVREvent, vr::TrackedDevicePose_t *pTrackedDevicePose) = 0;
+
+		/** returns the name of an EVREvent enum value */
+		virtual const char *GetEventTypeNameFromEnum(EVREventType eType) = 0;
+
+		// ------------------------------------
+		// Rendering helper methods
+		// ------------------------------------
+
+		/** Returns the hidden area mesh for the current HMD. The pixels covered by this mesh will never be seen by the user after the lens distortion is
+		 * applied based on visibility to the panels. If this HMD does not have a hidden area mesh, the vertex data and count will be NULL and 0 respectively.
+		 * This mesh is meant to be rendered into the stencil buffer (or into the depth buffer setting nearz) before rendering each eye's view.
+		 * This will improve performance by letting the GPU early-reject pixels the user will never see before running the pixel shader.
+		 * NOTE: Render this mesh with backface culling disabled since the winding order of the vertices can be different per-HMD or per-eye.
+		 * Setting the bInverse argument to true will produce the visible area mesh that is commonly used in place of full-screen quads. The visible area mesh covers all of the pixels the hidden area mesh does not cover.
+		 * Setting the bLineLoop argument will return a line loop of vertices in HiddenAreaMesh_t->pVertexData with HiddenAreaMesh_t->unTriangleCount set to the number of vertices.
+		 */
+		virtual HiddenAreaMesh_t GetHiddenAreaMesh(EVREye eEye, EHiddenAreaMeshType type = k_eHiddenAreaMesh_Standard) = 0;
+
+		// ------------------------------------
+		// Controller methods
+		// ------------------------------------
+
+		/** Fills the supplied struct with the current state of the controller. Returns false if the controller index
+		 * is invalid. This function is deprecated in favor of the new IVRInput system. */
+		virtual bool GetControllerState(vr::TrackedDeviceIndex_t unControllerDeviceIndex, vr::VRControllerState_t *pControllerState, uint32_t unControllerStateSize) = 0;
+
+		/** fills the supplied struct with the current state of the controller and the provided pose with the pose of
+		 * the controller when the controller state was updated most recently. Use this form if you need a precise controller
+		 * pose as input to your application when the user presses or releases a button. This function is deprecated in favor of the new IVRInput system. */
+		virtual bool GetControllerStateWithPose(ETrackingUniverseOrigin eOrigin, vr::TrackedDeviceIndex_t unControllerDeviceIndex, vr::VRControllerState_t *pControllerState, uint32_t unControllerStateSize, TrackedDevicePose_t *pTrackedDevicePose) = 0;
+
+		/** Trigger a single haptic pulse on a controller. After this call the application may not trigger another haptic pulse on this controller
+		 * and axis combination for 5ms. This function is deprecated in favor of the new IVRInput system. */
+		virtual void TriggerHapticPulse(vr::TrackedDeviceIndex_t unControllerDeviceIndex, uint32_t unAxisId, unsigned short usDurationMicroSec) = 0;
+
+		/** returns the name of an EVRButtonId enum value. This function is deprecated in favor of the new IVRInput system.  */
+		virtual const char *GetButtonIdNameFromEnum(EVRButtonId eButtonId) = 0;
+
+		/** returns the name of an EVRControllerAxisType enum value. This function is deprecated in favor of the new IVRInput system. */
+		virtual const char *GetControllerAxisTypeNameFromEnum(EVRControllerAxisType eAxisType) = 0;
+
+		/** Returns true if this application is receiving input from the system. This would return false if
+		 * system-related functionality is consuming the input stream. */
+		virtual bool IsInputAvailable() = 0;
+
+		/** Returns true SteamVR is drawing controllers on top of the application. Applications should consider
+		 * not drawing anything attached to the user's hands in this case. */
+		virtual bool IsSteamVRDrawingControllers() = 0;
+
+		/** Returns true if the user has put SteamVR into a mode that is distracting them from the application.
+		 * For applications where this is appropriate, the application should pause ongoing activity. */
+		virtual bool ShouldApplicationPause() = 0;
+
+		/** Returns true if SteamVR is doing significant rendering work and the game should do what it can to reduce
+		 * its own workload. One common way to do this is to reduce the size of the render target provided for each eye. */
+		virtual bool ShouldApplicationReduceRenderingWork() = 0;
+
+		// ------------------------------------
+		// Firmware methods
+		// ------------------------------------
+
+		/** Performs the actual firmware update if applicable.
+		 * The following events will be sent, if VRFirmwareError_None was returned: VREvent_FirmwareUpdateStarted, VREvent_FirmwareUpdateFinished
+		 * Use the properties Prop_Firmware_UpdateAvailable_Bool, Prop_Firmware_ManualUpdate_Bool, and Prop_Firmware_ManualUpdateURL_String
+		 * to figure our whether a firmware update is available, and to figure out whether its a manual update
+		 * Prop_Firmware_ManualUpdateURL_String should point to an URL describing the manual update process */
+		virtual vr::EVRFirmwareError PerformFirmwareUpdate(vr::TrackedDeviceIndex_t unDeviceIndex) = 0;
+
+		// ------------------------------------
+		// Application life cycle methods
+		// ------------------------------------
+
+		/** Call this to acknowledge to the system that VREvent_Quit has been received and that the process is exiting.
+		 * This extends the timeout until the process is killed. */
+		virtual void AcknowledgeQuit_Exiting() = 0;
+
+		// -------------------------------------
+		// App container sandbox methods
+		// -------------------------------------
+
+		/** Retrieves a null-terminated, semicolon-delimited list of UTF8 file paths that an application
+		 * must have read access to when running inside of an app container. Returns the number of bytes
+		 * needed to hold the list. */
+		virtual uint32_t GetAppContainerFilePaths(VR_OUT_STRING() char *pchBuffer, uint32_t unBufferSize) = 0;
+
+		// -------------------------------------
+		// System methods
+		// -------------------------------------
+
+		/** Returns the current version of the SteamVR runtime. The returned string will remain valid until VR_Shutdown is called.
+		 *
+		 * NOTE: Is it not appropriate to use this version to test for the presence of any SteamVR feature. Only use this version
+		 * number for logging or showing to a user, and not to try to detect anything at runtime. When appropriate, feature-specific
+		 * presence information is provided by other APIs. */
+		virtual const char *GetRuntimeVersion() = 0;
+	};
+
+	static const char *const IVRSystem_Version = "IVRSystem_022";
+
+}
+
+// ivrapplications.h
+
+namespace vr
+{
+
+	/** Used for all errors reported by the IVRApplications interface */
+	enum EVRApplicationError
+	{
+		VRApplicationError_None = 0,
+
+		VRApplicationError_AppKeyAlreadyExists = 100, // Only one application can use any given key
+		VRApplicationError_NoManifest = 101,		  // the running application does not have a manifest
+		VRApplicationError_NoApplication = 102,		  // No application is running
+		VRApplicationError_InvalidIndex = 103,
+		VRApplicationError_UnknownApplication = 104, // the application could not be found
+		VRApplicationError_IPCFailed = 105,			 // An IPC failure caused the request to fail
+		VRApplicationError_ApplicationAlreadyRunning = 106,
+		VRApplicationError_InvalidManifest = 107,
+		VRApplicationError_InvalidApplication = 108,
+		VRApplicationError_LaunchFailed = 109,				 // the process didn't start
+		VRApplicationError_ApplicationAlreadyStarting = 110, // the system was already starting the same application
+		VRApplicationError_LaunchInProgress = 111,			 // The system was already starting a different application
+		VRApplicationError_OldApplicationQuitting = 112,
+		VRApplicationError_TransitionAborted = 113,
+		VRApplicationError_IsTemplate = 114, // error when you try to call LaunchApplication() on a template type app (use LaunchTemplateApplication)
+		VRApplicationError_SteamVRIsExiting = 115,
+
+		VRApplicationError_BufferTooSmall = 200, // The provided buffer was too small to fit the requested data
+		VRApplicationError_PropertyNotSet = 201, // The requested property was not set
+		VRApplicationError_UnknownProperty = 202,
+		VRApplicationError_InvalidParameter = 203,
+
+		VRApplicationError_NotImplemented = 300, // Fcn is not implemented in current interface
+	};
+
+	/** The maximum length of an application key */
+	static const uint32_t k_unMaxApplicationKeyLength = 128;
+
+	/** these are the properties available on applications. */
+	enum EVRApplicationProperty
+	{
+		VRApplicationProperty_Name_String = 0,
+
+		VRApplicationProperty_LaunchType_String = 11,
+		VRApplicationProperty_WorkingDirectory_String = 12,
+		VRApplicationProperty_BinaryPath_String = 13,
+		VRApplicationProperty_Arguments_String = 14,
+		VRApplicationProperty_URL_String = 15,
+
+		VRApplicationProperty_Description_String = 50,
+		VRApplicationProperty_NewsURL_String = 51,
+		VRApplicationProperty_ImagePath_String = 52,
+		VRApplicationProperty_Source_String = 53,
+		VRApplicationProperty_ActionManifestURL_String = 54,
+
+		VRApplicationProperty_IsDashboardOverlay_Bool = 60,
+		VRApplicationProperty_IsTemplate_Bool = 61,
+		VRApplicationProperty_IsInstanced_Bool = 62,
+		VRApplicationProperty_IsInternal_Bool = 63,
+		VRApplicationProperty_WantsCompositorPauseInStandby_Bool = 64,
+		VRApplicationProperty_IsHidden_Bool = 65,
+
+		VRApplicationProperty_LastLaunchTime_Uint64 = 70,
+	};
+
+	enum EVRSceneApplicationState
+	{
+		EVRSceneApplicationState_None = 0,	   // Scene Application is not running
+		EVRSceneApplicationState_Starting = 1, // Scene Application is starting
+		EVRSceneApplicationState_Quitting = 2, // Scene Application is quitting
+		EVRSceneApplicationState_Running = 3,  // Scene Application is running, and submitting frames, a custom skybox, or a visible overlay
+		EVRSceneApplicationState_Waiting = 4,  // Scene Application is running, but not drawing anything
+	};
+
+	struct AppOverrideKeys_t
+	{
+		const char *pchKey;
+		const char *pchValue;
+	};
+
+	/** Currently recognized mime types */
+	static const char *const k_pch_MimeType_HomeApp = "vr/home";
+	static const char *const k_pch_MimeType_GameTheater = "vr/game_theater";
+
+	class IVRApplications
+	{
+	public:
+		// ---------------  Application management  --------------- //
+
+		/** Adds an application manifest to the list to load when building the list of installed applications.
+		 * Temporary manifests are not automatically loaded */
+		virtual EVRApplicationError AddApplicationManifest(const char *pchApplicationManifestFullPath, bool bTemporary = false) = 0;
+
+		/** Removes an application manifest from the list to load when building the list of installed applications. */
+		virtual EVRApplicationError RemoveApplicationManifest(const char *pchApplicationManifestFullPath) = 0;
+
+		/** Returns true if an application is installed */
+		virtual bool IsApplicationInstalled(const char *pchAppKey) = 0;
+
+		/** Returns the number of applications available in the list */
+		virtual uint32_t GetApplicationCount() = 0;
+
+		/** Returns the key of the specified application. The index is at least 0 and is less than the return
+		 * value of GetApplicationCount(). The buffer should be at least k_unMaxApplicationKeyLength in order to
+		 * fit the key. */
+		virtual EVRApplicationError GetApplicationKeyByIndex(uint32_t unApplicationIndex, VR_OUT_STRING() char *pchAppKeyBuffer, uint32_t unAppKeyBufferLen) = 0;
+
+		/** Returns the key of the application for the specified Process Id. The buffer should be at least
+		 * k_unMaxApplicationKeyLength in order to fit the key. */
+		virtual EVRApplicationError GetApplicationKeyByProcessId(uint32_t unProcessId, VR_OUT_STRING() char *pchAppKeyBuffer, uint32_t unAppKeyBufferLen) = 0;
+
+		/** Launches the application. The existing scene application will exit and then the new application will start.
+		 * This call is not valid for dashboard overlay applications. */
+		virtual EVRApplicationError LaunchApplication(const char *pchAppKey) = 0;
+
+		/** Launches an instance of an application of type template, with its app key being pchNewAppKey (which must be unique) and optionally override sections
+		 * from the manifest file via AppOverrideKeys_t
+		 */
+		virtual EVRApplicationError LaunchTemplateApplication(const char *pchTemplateAppKey, const char *pchNewAppKey, VR_ARRAY_COUNT(unKeys) const AppOverrideKeys_t *pKeys, uint32_t unKeys) = 0;
+
+		/** launches the application currently associated with this mime type and passes it the option args, typically the filename or object name of the item being launched */
+		virtual vr::EVRApplicationError LaunchApplicationFromMimeType(const char *pchMimeType, const char *pchArgs) = 0;
+
+		/** Launches the dashboard overlay application if it is not already running. This call is only valid for
+		 * dashboard overlay applications. */
+		virtual EVRApplicationError LaunchDashboardOverlay(const char *pchAppKey) = 0;
+
+		/** Cancel a pending launch for an application */
+		virtual bool CancelApplicationLaunch(const char *pchAppKey) = 0;
+
+		/** Identifies a running application. OpenVR can't always tell which process started in response
+		 * to a URL. This function allows a URL handler (or the process itself) to identify the app key
+		 * for the now running application. Passing a process ID of 0 identifies the calling process.
+		 * The application must be one that's known to the system via a call to AddApplicationManifest. */
+		virtual EVRApplicationError IdentifyApplication(uint32_t unProcessId, const char *pchAppKey) = 0;
+
+		/** Returns the process ID for an application. Return 0 if the application was not found or is not running. */
+		virtual uint32_t GetApplicationProcessId(const char *pchAppKey) = 0;
+
+		/** Returns a string for an applications error */
+		virtual const char *GetApplicationsErrorNameFromEnum(EVRApplicationError error) = 0;
+
+		// ---------------  Application properties  --------------- //
+
+		/** Returns a value for an application property. The required buffer size to fit this value will be returned. */
+		virtual uint32_t GetApplicationPropertyString(const char *pchAppKey, EVRApplicationProperty eProperty, VR_OUT_STRING() char *pchPropertyValueBuffer, uint32_t unPropertyValueBufferLen, EVRApplicationError *peError = nullptr) = 0;
+
+		/** Returns a bool value for an application property. Returns false in all error cases. */
+		virtual bool GetApplicationPropertyBool(const char *pchAppKey, EVRApplicationProperty eProperty, EVRApplicationError *peError = nullptr) = 0;
+
+		/** Returns a uint64 value for an application property. Returns 0 in all error cases. */
+		virtual uint64_t GetApplicationPropertyUint64(const char *pchAppKey, EVRApplicationProperty eProperty, EVRApplicationError *peError = nullptr) = 0;
+
+		/** Sets the application auto-launch flag. This is only valid for applications which return true for VRApplicationProperty_IsDashboardOverlay_Bool. */
+		virtual EVRApplicationError SetApplicationAutoLaunch(const char *pchAppKey, bool bAutoLaunch) = 0;
+
+		/** Gets the application auto-launch flag. This is only valid for applications which return true for VRApplicationProperty_IsDashboardOverlay_Bool. */
+		virtual bool GetApplicationAutoLaunch(const char *pchAppKey) = 0;
+
+		/** Adds this mime-type to the list of supported mime types for this application*/
+		virtual EVRApplicationError SetDefaultApplicationForMimeType(const char *pchAppKey, const char *pchMimeType) = 0;
+
+		/** return the app key that will open this mime type */
+		virtual bool GetDefaultApplicationForMimeType(const char *pchMimeType, VR_OUT_STRING() char *pchAppKeyBuffer, uint32_t unAppKeyBufferLen) = 0;
+
+		/** Get the list of supported mime types for this application, comma-delimited */
+		virtual bool GetApplicationSupportedMimeTypes(const char *pchAppKey, VR_OUT_STRING() char *pchMimeTypesBuffer, uint32_t unMimeTypesBuffer) = 0;
+
+		/** Get the list of app-keys that support this mime type, comma-delimited, the return value is number of bytes you need to return the full string */
+		virtual uint32_t GetApplicationsThatSupportMimeType(const char *pchMimeType, VR_OUT_STRING() char *pchAppKeysThatSupportBuffer, uint32_t unAppKeysThatSupportBuffer) = 0;
+
+		/** Get the args list from an app launch that had the process already running, you call this when you get a VREvent_ApplicationMimeTypeLoad */
+		virtual uint32_t GetApplicationLaunchArguments(uint32_t unHandle, VR_OUT_STRING() char *pchArgs, uint32_t unArgs) = 0;
+
+		// ---------------  Transition methods --------------- //
+
+		/** Returns the app key for the application that is starting up */
+		virtual EVRApplicationError GetStartingApplication(VR_OUT_STRING() char *pchAppKeyBuffer, uint32_t unAppKeyBufferLen) = 0;
+
+		/** Returns the application transition state */
+		virtual EVRSceneApplicationState GetSceneApplicationState() = 0;
+
+		/** Returns errors that would prevent the specified application from launching immediately. Calling this function will
+		 * cause the current scene application to quit, so only call it when you are actually about to launch something else.
+		 * What the caller should do about these failures depends on the failure:
+		 *   VRApplicationError_OldApplicationQuitting - An existing application has been told to quit. Wait for a VREvent_ProcessQuit
+		 *                                               and try again.
+		 *   VRApplicationError_ApplicationAlreadyStarting - This application is already starting. This is a permanent failure.
+		 *   VRApplicationError_LaunchInProgress	      - A different application is already starting. This is a permanent failure.
+		 *   VRApplicationError_None                   - Go ahead and launch. Everything is clear.
+		 */
+		virtual EVRApplicationError PerformApplicationPrelaunchCheck(const char *pchAppKey) = 0;
+
+		/** Returns a string for an application transition state */
+		virtual const char *GetSceneApplicationStateNameFromEnum(EVRSceneApplicationState state) = 0;
+
+		/** Starts a subprocess within the calling application. This
+		 * suppresses all application transition UI and automatically identifies the new executable
+		 * as part of the same application. On success the calling process should exit immediately.
+		 * If working directory is NULL or "" the directory portion of the binary path will be
+		 * the working directory. */
+		virtual EVRApplicationError LaunchInternalProcess(const char *pchBinaryPath, const char *pchArguments, const char *pchWorkingDirectory) = 0;
+
+		/** Returns the current scene process ID according to the application system. A scene process will get scene
+		 * focus once it starts rendering, but it will appear here once it calls VR_Init with the Scene application
+		 * type. */
+		virtual uint32_t GetCurrentSceneProcessId() = 0;
+	};
+
+	static const char *const IVRApplications_Version = "IVRApplications_007";
+
+} // namespace vr
+
+// ivrsettings.h
+
+#include <string>
+
+namespace vr
+{
+	enum EVRSettingsError
+	{
+		VRSettingsError_None = 0,
+		VRSettingsError_IPCFailed = 1,
+		VRSettingsError_WriteFailed = 2,
+		VRSettingsError_ReadFailed = 3,
+		VRSettingsError_JsonParseFailed = 4,
+		VRSettingsError_UnsetSettingHasNoDefault = 5, // This will be returned if the setting does not appear in the appropriate default file and has not been set
+	};
+
+	// The maximum length of a settings key
+	static const uint32_t k_unMaxSettingsKeyLength = 128;
+
+	class IVRSettings
+	{
+	public:
+		virtual const char *GetSettingsErrorNameFromEnum(EVRSettingsError eError) = 0;
+
+		virtual void SetBool(const char *pchSection, const char *pchSettingsKey, bool bValue, EVRSettingsError *peError = nullptr) = 0;
+		virtual void SetInt32(const char *pchSection, const char *pchSettingsKey, int32_t nValue, EVRSettingsError *peError = nullptr) = 0;
+		virtual void SetFloat(const char *pchSection, const char *pchSettingsKey, float flValue, EVRSettingsError *peError = nullptr) = 0;
+		virtual void SetString(const char *pchSection, const char *pchSettingsKey, const char *pchValue, EVRSettingsError *peError = nullptr) = 0;
+
+		// Users of the system need to provide a proper default in default.vrsettings in the resources/settings/ directory
+		// of either the runtime or the driver_xxx directory. Otherwise the default will be false, 0, 0.0 or ""
+		virtual bool GetBool(const char *pchSection, const char *pchSettingsKey, EVRSettingsError *peError = nullptr) = 0;
+		virtual int32_t GetInt32(const char *pchSection, const char *pchSettingsKey, EVRSettingsError *peError = nullptr) = 0;
+		virtual float GetFloat(const char *pchSection, const char *pchSettingsKey, EVRSettingsError *peError = nullptr) = 0;
+		virtual void GetString(const char *pchSection, const char *pchSettingsKey, VR_OUT_STRING() char *pchValue, uint32_t unValueLen, EVRSettingsError *peError = nullptr) = 0;
+
+		virtual void RemoveSection(const char *pchSection, EVRSettingsError *peError = nullptr) = 0;
+		virtual void RemoveKeyInSection(const char *pchSection, const char *pchSettingsKey, EVRSettingsError *peError = nullptr) = 0;
+	};
+
+	//-----------------------------------------------------------------------------
+	static const char *const IVRSettings_Version = "IVRSettings_003";
+
+	class CVRSettingHelper
+	{
+		IVRSettings *m_pSettings;
+
+	public:
+		CVRSettingHelper(IVRSettings *pSettings)
+		{
+			m_pSettings = pSettings;
+		}
+
+		const char *GetSettingsErrorNameFromEnum(EVRSettingsError eError)
+		{
+			return m_pSettings->GetSettingsErrorNameFromEnum(eError);
+		}
+
+		void SetBool(const char *pchSection, const char *pchSettingsKey, bool bValue, EVRSettingsError *peError = nullptr)
+		{
+			m_pSettings->SetBool(pchSection, pchSettingsKey, bValue, peError);
+		}
+
+		void SetInt32(const char *pchSection, const char *pchSettingsKey, int32_t nValue, EVRSettingsError *peError = nullptr)
+		{
+			m_pSettings->SetInt32(pchSection, pchSettingsKey, nValue, peError);
+		}
+		void SetFloat(const char *pchSection, const char *pchSettingsKey, float flValue, EVRSettingsError *peError = nullptr)
+		{
+			m_pSettings->SetFloat(pchSection, pchSettingsKey, flValue, peError);
+		}
+		void SetString(const char *pchSection, const char *pchSettingsKey, const char *pchValue, EVRSettingsError *peError = nullptr)
+		{
+			m_pSettings->SetString(pchSection, pchSettingsKey, pchValue, peError);
+		}
+		void SetString(const std::string &sSection, const std::string &sSettingsKey, const std::string &sValue, EVRSettingsError *peError = nullptr)
+		{
+			m_pSettings->SetString(sSection.c_str(), sSettingsKey.c_str(), sValue.c_str(), peError);
+		}
+
+		bool GetBool(const char *pchSection, const char *pchSettingsKey, EVRSettingsError *peError = nullptr)
+		{
+			return m_pSettings->GetBool(pchSection, pchSettingsKey, peError);
+		}
+		int32_t GetInt32(const char *pchSection, const char *pchSettingsKey, EVRSettingsError *peError = nullptr)
+		{
+			return m_pSettings->GetInt32(pchSection, pchSettingsKey, peError);
+		}
+		float GetFloat(const char *pchSection, const char *pchSettingsKey, EVRSettingsError *peError = nullptr)
+		{
+			return m_pSettings->GetFloat(pchSection, pchSettingsKey, peError);
+		}
+		void GetString(const char *pchSection, const char *pchSettingsKey, VR_OUT_STRING() char *pchValue, uint32_t unValueLen, EVRSettingsError *peError = nullptr)
+		{
+			m_pSettings->GetString(pchSection, pchSettingsKey, pchValue, unValueLen, peError);
+		}
+		std::string GetString(const std::string &sSection, const std::string &sSettingsKey, EVRSettingsError *peError = nullptr)
+		{
+			char buf[4096];
+			vr::EVRSettingsError eError;
+			m_pSettings->GetString(sSection.c_str(), sSettingsKey.c_str(), buf, sizeof(buf), &eError);
+			if (peError)
+				*peError = eError;
+			if (eError == vr::VRSettingsError_None)
+				return buf;
+			else
+				return "";
+		}
+
+		void RemoveSection(const char *pchSection, EVRSettingsError *peError = nullptr)
+		{
+			m_pSettings->RemoveSection(pchSection, peError);
+		}
+		void RemoveKeyInSection(const char *pchSection, const char *pchSettingsKey, EVRSettingsError *peError = nullptr)
+		{
+			m_pSettings->RemoveKeyInSection(pchSection, pchSettingsKey, peError);
+		}
+	};
+
+	//-----------------------------------------------------------------------------
+	// steamvr keys
+	static const char *const k_pch_SteamVR_Section = "steamvr";
+	static const char *const k_pch_SteamVR_RequireHmd_String = "requireHmd";
+	static const char *const k_pch_SteamVR_ForcedDriverKey_String = "forcedDriver";
+	static const char *const k_pch_SteamVR_ForcedHmdKey_String = "forcedHmd";
+	static const char *const k_pch_SteamVR_DisplayDebug_Bool = "displayDebug";
+	static const char *const k_pch_SteamVR_DebugProcessPipe_String = "debugProcessPipe";
+	static const char *const k_pch_SteamVR_DisplayDebugX_Int32 = "displayDebugX";
+	static const char *const k_pch_SteamVR_DisplayDebugY_Int32 = "displayDebugY";
+	static const char *const k_pch_SteamVR_SendSystemButtonToAllApps_Bool = "sendSystemButtonToAllApps";
+	static const char *const k_pch_SteamVR_LogLevel_Int32 = "loglevel";
+	static const char *const k_pch_SteamVR_IPD_Float = "ipd";
+	static const char *const k_pch_SteamVR_Background_String = "background";
+	static const char *const k_pch_SteamVR_BackgroundUseDomeProjection_Bool = "backgroundUseDomeProjection";
+	static const char *const k_pch_SteamVR_BackgroundCameraHeight_Float = "backgroundCameraHeight";
+	static const char *const k_pch_SteamVR_BackgroundDomeRadius_Float = "backgroundDomeRadius";
+	static const char *const k_pch_SteamVR_GridColor_String = "gridColor";
+	static const char *const k_pch_SteamVR_PlayAreaColor_String = "playAreaColor";
+	static const char *const k_pch_SteamVR_TrackingLossColor_String = "trackingLossColor";
+	static const char *const k_pch_SteamVR_ShowStage_Bool = "showStage";
+	static const char *const k_pch_SteamVR_DrawTrackingReferences_Bool = "drawTrackingReferences";
+	static const char *const k_pch_SteamVR_ActivateMultipleDrivers_Bool = "activateMultipleDrivers";
+	static const char *const k_pch_SteamVR_UsingSpeakers_Bool = "usingSpeakers";
+	static const char *const k_pch_SteamVR_SpeakersForwardYawOffsetDegrees_Float = "speakersForwardYawOffsetDegrees";
+	static const char *const k_pch_SteamVR_BaseStationPowerManagement_Int32 = "basestationPowerManagement";
+	static const char *const k_pch_SteamVR_ShowBaseStationPowerManagementTip_Int32 = "ShowBaseStationPowerManagementTip";
+	static const char *const k_pch_SteamVR_NeverKillProcesses_Bool = "neverKillProcesses";
+	static const char *const k_pch_SteamVR_SupersampleScale_Float = "supersampleScale";
+	static const char *const k_pch_SteamVR_MaxRecommendedResolution_Int32 = "maxRecommendedResolution";
+	static const char *const k_pch_SteamVR_MotionSmoothing_Bool = "motionSmoothing";
+	static const char *const k_pch_SteamVR_MotionSmoothingOverride_Int32 = "motionSmoothingOverride";
+	static const char *const k_pch_SteamVR_FramesToThrottle_Int32 = "framesToThrottle";
+	static const char *const k_pch_SteamVR_AdditionalFramesToPredict_Int32 = "additionalFramesToPredict";
+	static const char *const k_pch_SteamVR_WorldScale_Float = "worldScale";
+	static const char *const k_pch_SteamVR_FovScale_Int32 = "fovScale";
+	static const char *const k_pch_SteamVR_DisableAsyncReprojection_Bool = "disableAsync";
+	static const char *const k_pch_SteamVR_ForceFadeOnBadTracking_Bool = "forceFadeOnBadTracking";
+	static const char *const k_pch_SteamVR_DefaultMirrorView_Int32 = "mirrorView";
+	static const char *const k_pch_SteamVR_ShowLegacyMirrorView_Bool = "showLegacyMirrorView";
+	static const char *const k_pch_SteamVR_MirrorViewVisibility_Bool = "showMirrorView";
+	static const char *const k_pch_SteamVR_MirrorViewDisplayMode_Int32 = "mirrorViewDisplayMode";
+	static const char *const k_pch_SteamVR_MirrorViewEye_Int32 = "mirrorViewEye";
+	static const char *const k_pch_SteamVR_MirrorViewGeometry_String = "mirrorViewGeometry";
+	static const char *const k_pch_SteamVR_MirrorViewGeometryMaximized_String = "mirrorViewGeometryMaximized";
+	static const char *const k_pch_SteamVR_PerfGraphVisibility_Bool = "showPerfGraph";
+	static const char *const k_pch_SteamVR_StartMonitorFromAppLaunch = "startMonitorFromAppLaunch";
+	static const char *const k_pch_SteamVR_StartCompositorFromAppLaunch_Bool = "startCompositorFromAppLaunch";
+	static const char *const k_pch_SteamVR_StartDashboardFromAppLaunch_Bool = "startDashboardFromAppLaunch";
+	static const char *const k_pch_SteamVR_StartOverlayAppsFromDashboard_Bool = "startOverlayAppsFromDashboard";
+	static const char *const k_pch_SteamVR_EnableHomeApp = "enableHomeApp";
+	static const char *const k_pch_SteamVR_CycleBackgroundImageTimeSec_Int32 = "CycleBackgroundImageTimeSec";
+	static const char *const k_pch_SteamVR_RetailDemo_Bool = "retailDemo";
+	static const char *const k_pch_SteamVR_IpdOffset_Float = "ipdOffset";
+	static const char *const k_pch_SteamVR_AllowSupersampleFiltering_Bool = "allowSupersampleFiltering";
+	static const char *const k_pch_SteamVR_SupersampleManualOverride_Bool = "supersampleManualOverride";
+	static const char *const k_pch_SteamVR_EnableLinuxVulkanAsync_Bool = "enableLinuxVulkanAsync";
+	static const char *const k_pch_SteamVR_AllowDisplayLockedMode_Bool = "allowDisplayLockedMode";
+	static const char *const k_pch_SteamVR_HaveStartedTutorialForNativeChaperoneDriver_Bool = "haveStartedTutorialForNativeChaperoneDriver";
+	static const char *const k_pch_SteamVR_ForceWindows32bitVRMonitor = "forceWindows32BitVRMonitor";
+	static const char *const k_pch_SteamVR_DebugInputBinding = "debugInputBinding";
+	static const char *const k_pch_SteamVR_DoNotFadeToGrid = "doNotFadeToGrid";
+	static const char *const k_pch_SteamVR_RenderCameraMode = "renderCameraMode";
+	static const char *const k_pch_SteamVR_EnableSharedResourceJournaling = "enableSharedResourceJournaling";
+	static const char *const k_pch_SteamVR_EnableSafeMode = "enableSafeMode";
+	static const char *const k_pch_SteamVR_PreferredRefreshRate = "preferredRefreshRate";
+	static const char *const k_pch_SteamVR_LastVersionNotice = "lastVersionNotice";
+	static const char *const k_pch_SteamVR_LastVersionNoticeDate = "lastVersionNoticeDate";
+	static const char *const k_pch_SteamVR_HmdDisplayColorGainR_Float = "hmdDisplayColorGainR";
+	static const char *const k_pch_SteamVR_HmdDisplayColorGainG_Float = "hmdDisplayColorGainG";
+	static const char *const k_pch_SteamVR_HmdDisplayColorGainB_Float = "hmdDisplayColorGainB";
+	static const char *const k_pch_SteamVR_CustomIconStyle_String = "customIconStyle";
+	static const char *const k_pch_SteamVR_CustomOffIconStyle_String = "customOffIconStyle";
+	static const char *const k_pch_SteamVR_CustomIconForceUpdate_String = "customIconForceUpdate";
+	static const char *const k_pch_SteamVR_AllowGlobalActionSetPriority = "globalActionSetPriority";
+	static const char *const k_pch_SteamVR_OverlayRenderQuality = "overlayRenderQuality_2";
+	static const char *const k_pch_SteamVR_BlockOculusSDKOnOpenVRLaunchOption_Bool = "blockOculusSDKOnOpenVRLaunchOption";
+	static const char *const k_pch_SteamVR_BlockOculusSDKOnAllLaunches_Bool = "blockOculusSDKOnAllLaunches";
+	static const char *const k_pch_SteamVR_HDCPLegacyCompatibility_Bool = "hdcp14legacyCompatibility";
+	static const char *const k_pch_SteamVR_DisplayPortTrainingMode_Int = "displayPortTrainingMode";
+	static const char *const k_pch_SteamVR_UsePrism_Bool = "usePrism";
+
+	//-----------------------------------------------------------------------------
+	// direct mode keys
+	static const char *const k_pch_DirectMode_Section = "direct_mode";
+	static const char *const k_pch_DirectMode_Enable_Bool = "enable";
+	static const char *const k_pch_DirectMode_Count_Int32 = "count";
+	static const char *const k_pch_DirectMode_EdidVid_Int32 = "edidVid";
+	static const char *const k_pch_DirectMode_EdidPid_Int32 = "edidPid";
+
+	//-----------------------------------------------------------------------------
+	// lighthouse keys
+	static const char *const k_pch_Lighthouse_Section = "driver_lighthouse";
+	static const char *const k_pch_Lighthouse_DisableIMU_Bool = "disableimu";
+	static const char *const k_pch_Lighthouse_DisableIMUExceptHMD_Bool = "disableimuexcepthmd";
+	static const char *const k_pch_Lighthouse_UseDisambiguation_String = "usedisambiguation";
+	static const char *const k_pch_Lighthouse_DisambiguationDebug_Int32 = "disambiguationdebug";
+	static const char *const k_pch_Lighthouse_PrimaryBasestation_Int32 = "primarybasestation";
+	static const char *const k_pch_Lighthouse_DBHistory_Bool = "dbhistory";
+	static const char *const k_pch_Lighthouse_EnableBluetooth_Bool = "enableBluetooth";
+	static const char *const k_pch_Lighthouse_PowerManagedBaseStations_String = "PowerManagedBaseStations";
+	static const char *const k_pch_Lighthouse_PowerManagedBaseStations2_String = "PowerManagedBaseStations2";
+	static const char *const k_pch_Lighthouse_InactivityTimeoutForBaseStations_Int32 = "InactivityTimeoutForBaseStations";
+	static const char *const k_pch_Lighthouse_EnableImuFallback_Bool = "enableImuFallback";
+
+	//-----------------------------------------------------------------------------
+	// null keys
+	static const char *const k_pch_Null_Section = "driver_null";
+	static const char *const k_pch_Null_SerialNumber_String = "serialNumber";
+	static const char *const k_pch_Null_ModelNumber_String = "modelNumber";
+	static const char *const k_pch_Null_WindowX_Int32 = "windowX";
+	static const char *const k_pch_Null_WindowY_Int32 = "windowY";
+	static const char *const k_pch_Null_WindowWidth_Int32 = "windowWidth";
+	static const char *const k_pch_Null_WindowHeight_Int32 = "windowHeight";
+	static const char *const k_pch_Null_RenderWidth_Int32 = "renderWidth";
+	static const char *const k_pch_Null_RenderHeight_Int32 = "renderHeight";
+	static const char *const k_pch_Null_SecondsFromVsyncToPhotons_Float = "secondsFromVsyncToPhotons";
+	static const char *const k_pch_Null_DisplayFrequency_Float = "displayFrequency";
+
+	//-----------------------------------------------------------------------------
+	// Windows MR keys
+	static const char *const k_pch_WindowsMR_Section = "driver_holographic";
+
+	//-----------------------------------------------------------------------------
+	// user interface keys
+	static const char *const k_pch_UserInterface_Section = "userinterface";
+	static const char *const k_pch_UserInterface_StatusAlwaysOnTop_Bool = "StatusAlwaysOnTop";
+	static const char *const k_pch_UserInterface_MinimizeToTray_Bool = "MinimizeToTray";
+	static const char *const k_pch_UserInterface_HidePopupsWhenStatusMinimized_Bool = "HidePopupsWhenStatusMinimized";
+	static const char *const k_pch_UserInterface_Screenshots_Bool = "screenshots";
+	static const char *const k_pch_UserInterface_ScreenshotType_Int = "screenshotType";
+
+	//-----------------------------------------------------------------------------
+	// notification keys
+	static const char *const k_pch_Notifications_Section = "notifications";
+	static const char *const k_pch_Notifications_DoNotDisturb_Bool = "DoNotDisturb";
+
+	//-----------------------------------------------------------------------------
+	// keyboard keys
+	static const char *const k_pch_Keyboard_Section = "keyboard";
+	static const char *const k_pch_Keyboard_TutorialCompletions = "TutorialCompletions";
+	static const char *const k_pch_Keyboard_ScaleX = "ScaleX";
+	static const char *const k_pch_Keyboard_ScaleY = "ScaleY";
+	static const char *const k_pch_Keyboard_OffsetLeftX = "OffsetLeftX";
+	static const char *const k_pch_Keyboard_OffsetRightX = "OffsetRightX";
+	static const char *const k_pch_Keyboard_OffsetY = "OffsetY";
+	static const char *const k_pch_Keyboard_Smoothing = "Smoothing";
+
+	//-----------------------------------------------------------------------------
+	// perf keys
+	static const char *const k_pch_Perf_Section = "perfcheck";
+	static const char *const k_pch_Perf_PerfGraphInHMD_Bool = "perfGraphInHMD";
+	static const char *const k_pch_Perf_AllowTimingStore_Bool = "allowTimingStore";
+	static const char *const k_pch_Perf_SaveTimingsOnExit_Bool = "saveTimingsOnExit";
+	static const char *const k_pch_Perf_TestData_Float = "perfTestData";
+	static const char *const k_pch_Perf_GPUProfiling_Bool = "GPUProfiling";
+
+	//-----------------------------------------------------------------------------
+	// collision bounds keys
+	static const char *const k_pch_CollisionBounds_Section = "collisionBounds";
+	static const char *const k_pch_CollisionBounds_Style_Int32 = "CollisionBoundsStyle";
+	static const char *const k_pch_CollisionBounds_GroundPerimeterOn_Bool = "CollisionBoundsGroundPerimeterOn";
+	static const char *const k_pch_CollisionBounds_CenterMarkerOn_Bool = "CollisionBoundsCenterMarkerOn";
+	static const char *const k_pch_CollisionBounds_PlaySpaceOn_Bool = "CollisionBoundsPlaySpaceOn";
+	static const char *const k_pch_CollisionBounds_FadeDistance_Float = "CollisionBoundsFadeDistance";
+	static const char *const k_pch_CollisionBounds_WallHeight_Float = "CollisionBoundsWallHeight";
+	static const char *const k_pch_CollisionBounds_ColorGammaR_Int32 = "CollisionBoundsColorGammaR";
+	static const char *const k_pch_CollisionBounds_ColorGammaG_Int32 = "CollisionBoundsColorGammaG";
+	static const char *const k_pch_CollisionBounds_ColorGammaB_Int32 = "CollisionBoundsColorGammaB";
+	static const char *const k_pch_CollisionBounds_ColorGammaA_Int32 = "CollisionBoundsColorGammaA";
+	static const char *const k_pch_CollisionBounds_EnableDriverImport = "enableDriverBoundsImport";
+
+	//-----------------------------------------------------------------------------
+	// camera keys
+	static const char *const k_pch_Camera_Section = "camera";
+	static const char *const k_pch_Camera_EnableCamera_Bool = "enableCamera";
+	static const char *const k_pch_Camera_ShowOnController_Bool = "showOnController";
+	static const char *const k_pch_Camera_EnableCameraForCollisionBounds_Bool = "enableCameraForCollisionBounds";
+	static const char *const k_pch_Camera_RoomView_Int32 = "roomView";
+	static const char *const k_pch_Camera_BoundsColorGammaR_Int32 = "cameraBoundsColorGammaR";
+	static const char *const k_pch_Camera_BoundsColorGammaG_Int32 = "cameraBoundsColorGammaG";
+	static const char *const k_pch_Camera_BoundsColorGammaB_Int32 = "cameraBoundsColorGammaB";
+	static const char *const k_pch_Camera_BoundsColorGammaA_Int32 = "cameraBoundsColorGammaA";
+	static const char *const k_pch_Camera_BoundsStrength_Int32 = "cameraBoundsStrength";
+	static const char *const k_pch_Camera_RoomViewStyle_Int32 = "roomViewStyle";
+
+	//-----------------------------------------------------------------------------
+	// audio keys
+	static const char *const k_pch_audio_Section = "audio";
+	static const char *const k_pch_audio_SetOsDefaultPlaybackDevice_Bool = "setOsDefaultPlaybackDevice";
+	static const char *const k_pch_audio_EnablePlaybackDeviceOverride_Bool = "enablePlaybackDeviceOverride";
+	static const char *const k_pch_audio_PlaybackDeviceOverride_String = "playbackDeviceOverride";
+	static const char *const k_pch_audio_PlaybackDeviceOverrideName_String = "playbackDeviceOverrideName";
+	static const char *const k_pch_audio_SetOsDefaultRecordingDevice_Bool = "setOsDefaultRecordingDevice";
+	static const char *const k_pch_audio_EnableRecordingDeviceOverride_Bool = "enableRecordingDeviceOverride";
+	static const char *const k_pch_audio_RecordingDeviceOverride_String = "recordingDeviceOverride";
+	static const char *const k_pch_audio_RecordingDeviceOverrideName_String = "recordingDeviceOverrideName";
+	static const char *const k_pch_audio_EnablePlaybackMirror_Bool = "enablePlaybackMirror";
+	static const char *const k_pch_audio_PlaybackMirrorDevice_String = "playbackMirrorDevice";
+	static const char *const k_pch_audio_PlaybackMirrorDeviceName_String = "playbackMirrorDeviceName";
+	static const char *const k_pch_audio_OldPlaybackMirrorDevice_String = "onPlaybackMirrorDevice";
+	static const char *const k_pch_audio_ActiveMirrorDevice_String = "activePlaybackMirrorDevice";
+	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";
+	static const char *const k_pch_audio_MuteMicMonitor_Bool = "muteMicMonitor";
+
+	//-----------------------------------------------------------------------------
+	// power management keys
+	static const char *const k_pch_Power_Section = "power";
+	static const char *const k_pch_Power_PowerOffOnExit_Bool = "powerOffOnExit";
+	static const char *const k_pch_Power_TurnOffScreensTimeout_Float = "turnOffScreensTimeout";
+	static const char *const k_pch_Power_TurnOffControllersTimeout_Float = "turnOffControllersTimeout";
+	static const char *const k_pch_Power_ReturnToWatchdogTimeout_Float = "returnToWatchdogTimeout";
+	static const char *const k_pch_Power_AutoLaunchSteamVROnButtonPress = "autoLaunchSteamVROnButtonPress";
+	static const char *const k_pch_Power_PauseCompositorOnStandby_Bool = "pauseCompositorOnStandby";
+
+	//-----------------------------------------------------------------------------
+	// dashboard keys
+	static const char *const k_pch_Dashboard_Section = "dashboard";
+	static const char *const k_pch_Dashboard_EnableDashboard_Bool = "enableDashboard";
+	static const char *const k_pch_Dashboard_ArcadeMode_Bool = "arcadeMode";
+	static const char *const k_pch_Dashboard_Position = "position";
+	static const char *const k_pch_Dashboard_DesktopScale = "desktopScale";
+	static const char *const k_pch_Dashboard_DashboardScale = "dashboardScale";
+	static const char *const k_pch_Dashboard_UseStandaloneSystemLayer = "standaloneSystemLayer";
+	static const char *const k_pch_Dashboard_StickyDashboard = "stickyDashboard";
+
+	//-----------------------------------------------------------------------------
+	// model skin keys
+	static const char *const k_pch_modelskin_Section = "modelskins";
+
+	//-----------------------------------------------------------------------------
+	// driver keys - These could be checked in any driver_<name> section
+	static const char *const k_pch_Driver_Enable_Bool = "enable";
+	static const char *const k_pch_Driver_BlockedBySafemode_Bool = "blocked_by_safe_mode";
+	static const char *const k_pch_Driver_LoadPriority_Int32 = "loadPriority";
+
+	//-----------------------------------------------------------------------------
+	// web interface keys
+	static const char *const k_pch_WebInterface_Section = "WebInterface";
+
+	//-----------------------------------------------------------------------------
+	// vrwebhelper keys
+	static const char *const k_pch_VRWebHelper_Section = "VRWebHelper";
+	static const char *const k_pch_VRWebHelper_DebuggerEnabled_Bool = "DebuggerEnabled";
+	static const char *const k_pch_VRWebHelper_DebuggerPort_Int32 = "DebuggerPort";
+
+	//-----------------------------------------------------------------------------
+	// tracking overrides - keys are device paths, values are the device paths their
+	//  tracking/pose information overrides
+	static const char *const k_pch_TrackingOverride_Section = "TrackingOverrides";
+
+	//-----------------------------------------------------------------------------
+	// per-app keys - the section name for these is the app key itself. Some of these are prefixed by the controller type
+	static const char *const k_pch_App_BindingAutosaveURLSuffix_String = "AutosaveURL";
+	static const char *const k_pch_App_BindingLegacyAPISuffix_String = "_legacy";
+	static const char *const k_pch_App_BindingSteamVRInputAPISuffix_String = "_steamvrinput";
+	static const char *const k_pch_App_BindingCurrentURLSuffix_String = "CurrentURL";
+	static const char *const k_pch_App_BindingPreviousURLSuffix_String = "PreviousURL";
+	static const char *const k_pch_App_NeedToUpdateAutosaveSuffix_Bool = "NeedToUpdateAutosave";
+	static const char *const k_pch_App_DominantHand_Int32 = "DominantHand";
+	static const char *const k_pch_App_BlockOculusSDK_Bool = "blockOculusSDK";
+
+	//-----------------------------------------------------------------------------
+	// configuration for trackers
+	static const char *const k_pch_Trackers_Section = "trackers";
+
+	//-----------------------------------------------------------------------------
+	// configuration for desktop UI windows
+	static const char *const k_pch_DesktopUI_Section = "DesktopUI";
+
+	//-----------------------------------------------------------------------------
+	// Last known keys for righting recovery
+	static const char *const k_pch_LastKnown_Section = "LastKnown";
+	static const char *const k_pch_LastKnown_HMDManufacturer_String = "HMDManufacturer";
+	static const char *const k_pch_LastKnown_HMDModel_String = "HMDModel";
+
+	//-----------------------------------------------------------------------------
+	// Dismissed warnings
+	static const char *const k_pch_DismissedWarnings_Section = "DismissedWarnings";
+
+	//-----------------------------------------------------------------------------
+	// Input Settings
+	static const char *const k_pch_Input_Section = "input";
+	static const char *const k_pch_Input_LeftThumbstickRotation_Float = "leftThumbstickRotation";
+	static const char *const k_pch_Input_RightThumbstickRotation_Float = "rightThumbstickRotation";
+	static const char *const k_pch_Input_ThumbstickDeadzone_Float = "thumbstickDeadzone";
+
+	//-----------------------------------------------------------------------------
+	// Log of GPU performance
+	static const char *const k_pch_GpuSpeed_Section = "GpuSpeed";
+
+} // namespace vr
+
+// ivrchaperone.h
+
+namespace vr
+{
+
+#pragma pack(push, 8)
+
+	enum ChaperoneCalibrationState
+	{
+		// OK!
+		ChaperoneCalibrationState_OK = 1, // Chaperone is fully calibrated and working correctly
+
+		// Warnings
+		ChaperoneCalibrationState_Warning = 100,
+		ChaperoneCalibrationState_Warning_BaseStationMayHaveMoved = 101, // A base station thinks that it might have moved
+		ChaperoneCalibrationState_Warning_BaseStationRemoved = 102,		 // There are less base stations than when calibrated
+		ChaperoneCalibrationState_Warning_SeatedBoundsInvalid = 103,	 // Seated bounds haven't been calibrated for the current tracking center
+
+		// Errors
+		ChaperoneCalibrationState_Error = 200,							// The UniverseID is invalid
+		ChaperoneCalibrationState_Error_BaseStationUninitialized = 201, // Tracking center hasn't be calibrated for at least one of the base stations
+		ChaperoneCalibrationState_Error_BaseStationConflict = 202,		// Tracking center is calibrated, but base stations disagree on the tracking space
+		ChaperoneCalibrationState_Error_PlayAreaInvalid = 203,			// Play Area hasn't been calibrated for the current tracking center
+		ChaperoneCalibrationState_Error_CollisionBoundsInvalid = 204,	// Collision Bounds haven't been calibrated for the current tracking center
+	};
+
+	/** HIGH LEVEL TRACKING SPACE ASSUMPTIONS:
+	 * 0,0,0 is the preferred standing area center.
+	 * 0Y is the floor height.
+	 * -Z is the preferred forward facing direction. */
+	class IVRChaperone
+	{
+	public:
+		/** Get the current state of Chaperone calibration. This state can change at any time during a session due to physical base station changes. **/
+		virtual ChaperoneCalibrationState GetCalibrationState() = 0;
+
+		/** Returns the width and depth of the Play Area (formerly named Soft Bounds) in X and Z.
+		 * Tracking space center (0,0,0) is the center of the Play Area. **/
+		virtual bool GetPlayAreaSize(float *pSizeX, float *pSizeZ) = 0;
+
+		/** Returns the 4 corner positions of the Play Area (formerly named Soft Bounds).
+		 * Corners are in counter-clockwise order.
+		 * Standing center (0,0,0) is the center of the Play Area.
+		 * It's a rectangle.
+		 * 2 sides are parallel to the X axis and 2 sides are parallel to the Z axis.
+		 * Height of every corner is 0Y (on the floor). **/
+		virtual bool GetPlayAreaRect(HmdQuad_t *rect) = 0;
+
+		/** Reload Chaperone data from the .vrchap file on disk. */
+		virtual void ReloadInfo(void) = 0;
+
+		/** Optionally give the chaperone system a hit about the color and brightness in the scene **/
+		virtual void SetSceneColor(HmdColor_t color) = 0;
+
+		/** Get the current chaperone bounds draw color and brightness **/
+		virtual void GetBoundsColor(HmdColor_t *pOutputColorArray, int nNumOutputColors, float flCollisionBoundsFadeDistance, HmdColor_t *pOutputCameraColor) = 0;
+
+		/** Determine whether the bounds are showing right now **/
+		virtual bool AreBoundsVisible() = 0;
+
+		/** Force the bounds to show, mostly for utilities **/
+		virtual void ForceBoundsVisible(bool bForce) = 0;
+
+		/** Sets the zero pose for the given tracker coordinate system to the current position and yaw of the HMD. After
+		 * ResetZeroPose all GetDeviceToAbsoluteTrackingPose calls as the origin will be relative to this new zero pose.
+		 * The new zero coordinate system will not change the fact that the Y axis is up in the real world, so the next
+		 * pose returned from GetDeviceToAbsoluteTrackingPose after a call to ResetZeroPose may not be exactly an
+		 * identity matrix.
+		 *
+		 * NOTE: This function overrides the user's previously saved zero pose and should only be called as the result of a user action.
+		 * Users are also able to set their zero pose via the OpenVR Dashboard.
+		 **/
+		virtual void ResetZeroPose(ETrackingUniverseOrigin eTrackingUniverseOrigin) = 0;
+	};
+
+	static const char *const IVRChaperone_Version = "IVRChaperone_004";
+
+#pragma pack(pop)
+
+}
+
+// ivrchaperonesetup.h
+
+namespace vr
+{
+
+	enum EChaperoneConfigFile
+	{
+		EChaperoneConfigFile_Live = 1, // The live chaperone config, used by most applications and games
+		EChaperoneConfigFile_Temp = 2, // The temporary chaperone config, used to live-preview collision bounds in room setup
+	};
+
+	enum EChaperoneImportFlags
+	{
+		EChaperoneImport_BoundsOnly = 0x0001,
+	};
+
+	/** Manages the working copy of the chaperone info. By default this will be the same as the
+	 * live copy. Any changes made with this interface will stay in the working copy until
+	 * CommitWorkingCopy() is called, at which point the working copy and the live copy will be
+	 * the same again. */
+	class IVRChaperoneSetup
+	{
+	public:
+		/** Saves the current working copy to disk */
+		virtual bool CommitWorkingCopy(EChaperoneConfigFile configFile) = 0;
+
+		/** Reverts the working copy to match the live chaperone calibration.
+		 * To modify existing data this MUST be do WHILE getting a non-error ChaperoneCalibrationStatus.
+		 * Only after this should you do gets and sets on the existing data. */
+		virtual void RevertWorkingCopy() = 0;
+
+		/** Returns the width and depth of the Play Area (formerly named Soft Bounds) in X and Z from the working copy.
+		 * Tracking space center (0,0,0) is the center of the Play Area. */
+		virtual bool GetWorkingPlayAreaSize(float *pSizeX, float *pSizeZ) = 0;
+
+		/** Returns the 4 corner positions of the Play Area (formerly named Soft Bounds) from the working copy.
+		 * Corners are in clockwise order.
+		 * Tracking space center (0,0,0) is the center of the Play Area.
+		 * It's a rectangle.
+		 * 2 sides are parallel to the X axis and 2 sides are parallel to the Z axis.
+		 * Height of every corner is 0Y (on the floor). **/
+		virtual bool GetWorkingPlayAreaRect(HmdQuad_t *rect) = 0;
+
+		/** Returns the number of Quads if the buffer points to null. Otherwise it returns Quads
+		 * into the buffer up to the max specified from the working copy. */
+		virtual bool GetWorkingCollisionBoundsInfo(VR_OUT_ARRAY_COUNT(punQuadsCount) HmdQuad_t *pQuadsBuffer, uint32_t *punQuadsCount) = 0;
+
+		/** Returns the number of Quads if the buffer points to null. Otherwise it returns Quads
+		 * into the buffer up to the max specified. */
+		virtual bool GetLiveCollisionBoundsInfo(VR_OUT_ARRAY_COUNT(punQuadsCount) HmdQuad_t *pQuadsBuffer, uint32_t *punQuadsCount) = 0;
+
+		/** Returns the preferred seated position from the working copy. */
+		virtual bool GetWorkingSeatedZeroPoseToRawTrackingPose(HmdMatrix34_t *pmatSeatedZeroPoseToRawTrackingPose) = 0;
+
+		/** Returns the standing origin from the working copy. */
+		virtual bool GetWorkingStandingZeroPoseToRawTrackingPose(HmdMatrix34_t *pmatStandingZeroPoseToRawTrackingPose) = 0;
+
+		/** Sets the Play Area in the working copy. */
+		virtual void SetWorkingPlayAreaSize(float sizeX, float sizeZ) = 0;
+
+		/** Sets the Collision Bounds in the working copy. Note: ceiling height is ignored. */
+		virtual void SetWorkingCollisionBoundsInfo(VR_ARRAY_COUNT(unQuadsCount) HmdQuad_t *pQuadsBuffer, uint32_t unQuadsCount) = 0;
+
+		/** Sets the Collision Bounds in the working copy. */
+		virtual void SetWorkingPerimeter(VR_ARRAY_COUNT(unPointCount) HmdVector2_t *pPointBuffer, uint32_t unPointCount) = 0;
+
+		/** Sets the preferred seated position in the working copy. */
+		virtual void SetWorkingSeatedZeroPoseToRawTrackingPose(const HmdMatrix34_t *pMatSeatedZeroPoseToRawTrackingPose) = 0;
+
+		/** Sets the preferred standing position in the working copy. */
+		virtual void SetWorkingStandingZeroPoseToRawTrackingPose(const HmdMatrix34_t *pMatStandingZeroPoseToRawTrackingPose) = 0;
+
+		/** Tear everything down and reload it from the file on disk */
+		virtual void ReloadFromDisk(EChaperoneConfigFile configFile) = 0;
+
+		/** Returns the preferred seated position. */
+		virtual bool GetLiveSeatedZeroPoseToRawTrackingPose(HmdMatrix34_t *pmatSeatedZeroPoseToRawTrackingPose) = 0;
+
+		virtual bool ExportLiveToBuffer(VR_OUT_STRING() char *pBuffer, uint32_t *pnBufferLength) = 0;
+		virtual bool ImportFromBufferToWorking(const char *pBuffer, uint32_t nImportFlags) = 0;
+
+		/** Shows the chaperone data in the working set to preview in the compositor.*/
+		virtual void ShowWorkingSetPreview() = 0;
+
+		/** Hides the chaperone data in the working set to preview in the compositor (if it was visible).*/
+		virtual void HideWorkingSetPreview() = 0;
+
+		/** Fire an event that the tracking system can use to know room setup is about to begin. This lets the tracking
+		 * system make any last minute adjustments that should be incorporated into the new setup.  If the user is adjusting
+		 * live in HMD using a tweak tool, keep in mind that calling this might cause the user to see the room jump. */
+		virtual void RoomSetupStarting() = 0;
+	};
+
+	static const char *const IVRChaperoneSetup_Version = "IVRChaperoneSetup_006";
+
+}
+
+// ivrcompositor.h
+
+namespace vr
+{
+
+#pragma pack(push, 8)
+
+	/** Errors that can occur with the VR compositor */
+	enum EVRCompositorError
+	{
+		VRCompositorError_None = 0,
+		VRCompositorError_RequestFailed = 1,
+		VRCompositorError_IncompatibleVersion = 100,
+		VRCompositorError_DoNotHaveFocus = 101,
+		VRCompositorError_InvalidTexture = 102,
+		VRCompositorError_IsNotSceneApplication = 103,
+		VRCompositorError_TextureIsOnWrongDevice = 104,
+		VRCompositorError_TextureUsesUnsupportedFormat = 105,
+		VRCompositorError_SharedTexturesNotSupported = 106,
+		VRCompositorError_IndexOutOfRange = 107,
+		VRCompositorError_AlreadySubmitted = 108,
+		VRCompositorError_InvalidBounds = 109,
+		VRCompositorError_AlreadySet = 110,
+	};
+
+	/** Timing mode passed to SetExplicitTimingMode(); see that function for documentation */
+	enum EVRCompositorTimingMode
+	{
+		VRCompositorTimingMode_Implicit = 0,
+		VRCompositorTimingMode_Explicit_RuntimePerformsPostPresentHandoff = 1,
+		VRCompositorTimingMode_Explicit_ApplicationPerformsPostPresentHandoff = 2,
+	};
+
+	/** Cumulative stats for current application.  These are not cleared until a new app connects,
+	 * but they do stop accumulating once the associated app disconnects. */
+	struct Compositor_CumulativeStats
+	{
+		uint32_t m_nPid;				  // Process id associated with these stats (may no longer be running).
+		uint32_t m_nNumFramePresents;	  // total number of times we called present (includes reprojected frames)
+		uint32_t m_nNumDroppedFrames;	  // total number of times an old frame was re-scanned out (without reprojection)
+		uint32_t m_nNumReprojectedFrames; // total number of times a frame was scanned out a second time (with reprojection)
+
+		/** Values recorded at startup before application has fully faded in the first time. */
+		uint32_t m_nNumFramePresentsOnStartup;
+		uint32_t m_nNumDroppedFramesOnStartup;
+		uint32_t m_nNumReprojectedFramesOnStartup;
+
+		/** Applications may explicitly fade to the compositor.  This is usually to handle level transitions, and loading often causes
+		 * system wide hitches.  The following stats are collected during this period.  Does not include values recorded during startup. */
+		uint32_t m_nNumLoading;
+		uint32_t m_nNumFramePresentsLoading;
+		uint32_t m_nNumDroppedFramesLoading;
+		uint32_t m_nNumReprojectedFramesLoading;
+
+		/** If we don't get a new frame from the app in less than 2.5 frames, then we assume the app has hung and start
+		 * fading back to the compositor.  The following stats are a result of this, and are a subset of those recorded above.
+		 * Does not include values recorded during start up or loading. */
+		uint32_t m_nNumTimedOut;
+		uint32_t m_nNumFramePresentsTimedOut;
+		uint32_t m_nNumDroppedFramesTimedOut;
+		uint32_t m_nNumReprojectedFramesTimedOut;
+	};
+
+	struct Compositor_StageRenderSettings
+	{
+		/** Primary color is applied as a tint to (i.e. multiplied with) the model's texture */
+		HmdColor_t m_PrimaryColor;
+		HmdColor_t m_SecondaryColor;
+
+		/** Vignette radius is in meters and is used to fade to the specified secondary solid color over
+		 * that 3D distance from the origin of the playspace. */
+		float m_flVignetteInnerRadius;
+		float m_flVignetteOuterRadius;
+
+		/** Fades to the secondary color based on view incidence.  This variable controls the linearity
+		 * of the effect.  It is mutually exclusive with vignette.  Additionally, it treats the mesh as faceted. */
+		float m_flFresnelStrength;
+
+		/** Controls backface culling. */
+		bool m_bBackfaceCulling;
+
+		/** Converts the render model's texture to luma and applies to rgb equally.  This is useful to
+		 * combat compression artifacts that can occur on desaturated source material. */
+		bool m_bGreyscale;
+
+		/** Renders mesh as a wireframe. */
+		bool m_bWireframe;
+	};
+
+	static inline Compositor_StageRenderSettings DefaultStageRenderSettings()
+	{
+		Compositor_StageRenderSettings settings;
+		settings.m_PrimaryColor.r = 1.0f;
+		settings.m_PrimaryColor.g = 1.0f;
+		settings.m_PrimaryColor.b = 1.0f;
+		settings.m_PrimaryColor.a = 1.0f;
+		settings.m_SecondaryColor.r = 1.0f;
+		settings.m_SecondaryColor.g = 1.0f;
+		settings.m_SecondaryColor.b = 1.0f;
+		settings.m_SecondaryColor.a = 1.0f;
+		settings.m_flVignetteInnerRadius = 0.0f;
+		settings.m_flVignetteOuterRadius = 0.0f;
+		settings.m_flFresnelStrength = 0.0f;
+		settings.m_bBackfaceCulling = false;
+		settings.m_bGreyscale = false;
+		settings.m_bWireframe = false;
+		return settings;
+	}
+
+#pragma pack(pop)
+
+	/** Allows the application to interact with the compositor */
+	class IVRCompositor
+	{
+	public:
+		/** Sets tracking space returned by WaitGetPoses */
+		virtual void SetTrackingSpace(ETrackingUniverseOrigin eOrigin) = 0;
+
+		/** Gets current tracking space returned by WaitGetPoses */
+		virtual ETrackingUniverseOrigin GetTrackingSpace() = 0;
+
+		/** Scene applications should call this function to get poses to render with (and optionally poses predicted an additional frame out to use for gameplay).
+		 * This function will block until "running start" milliseconds before the start of the frame, and should be called at the last moment before needing to
+		 * start rendering.
+		 *
+		 * Return codes:
+		 *	- IsNotSceneApplication (make sure to call VR_Init with VRApplicaiton_Scene)
+		 *	- DoNotHaveFocus (some other app has taken focus - this will throttle the call to 10hz to reduce the impact on that app)
+		 */
+		virtual EVRCompositorError WaitGetPoses(VR_ARRAY_COUNT(unRenderPoseArrayCount) TrackedDevicePose_t *pRenderPoseArray, uint32_t unRenderPoseArrayCount,
+												VR_ARRAY_COUNT(unGamePoseArrayCount) TrackedDevicePose_t *pGamePoseArray, uint32_t unGamePoseArrayCount) = 0;
+
+		/** Get the last set of poses returned by WaitGetPoses. */
+		virtual EVRCompositorError GetLastPoses(VR_ARRAY_COUNT(unRenderPoseArrayCount) TrackedDevicePose_t *pRenderPoseArray, uint32_t unRenderPoseArrayCount,
+												VR_ARRAY_COUNT(unGamePoseArrayCount) TrackedDevicePose_t *pGamePoseArray, uint32_t unGamePoseArrayCount) = 0;
+
+		/** Interface for accessing last set of poses returned by WaitGetPoses one at a time.
+		 * Returns VRCompositorError_IndexOutOfRange if unDeviceIndex not less than k_unMaxTrackedDeviceCount otherwise VRCompositorError_None.
+		 * It is okay to pass NULL for either pose if you only want one of the values. */
+		virtual EVRCompositorError GetLastPoseForTrackedDeviceIndex(TrackedDeviceIndex_t unDeviceIndex, TrackedDevicePose_t *pOutputPose, TrackedDevicePose_t *pOutputGamePose) = 0;
+
+		/** Updated scene texture to display. If pBounds is NULL the entire texture will be used.  If called from an OpenGL app, consider adding a glFlush after
+		 * Submitting both frames to signal the driver to start processing, otherwise it may wait until the command buffer fills up, causing the app to miss frames.
+		 *
+		 * OpenGL dirty state:
+		 *	glBindTexture
+		 *
+		 * Return codes:
+		 *	- IsNotSceneApplication (make sure to call VR_Init with VRApplicaiton_Scene)
+		 *	- DoNotHaveFocus (some other app has taken focus)
+		 *	- TextureIsOnWrongDevice (application did not use proper AdapterIndex - see IVRSystem.GetDXGIOutputInfo)
+		 *	- SharedTexturesNotSupported (application needs to call CreateDXGIFactory1 or later before creating DX device)
+		 *	- TextureUsesUnsupportedFormat (scene textures must be compatible with DXGI sharing rules - e.g. uncompressed, no mips, etc.)
+		 *	- InvalidTexture (usually means bad arguments passed in)
+		 *	- AlreadySubmitted (app has submitted two left textures or two right textures in a single frame - i.e. before calling WaitGetPoses again)
+		 */
+		virtual EVRCompositorError Submit(EVREye eEye, const Texture_t *pTexture, const VRTextureBounds_t *pBounds = 0, EVRSubmitFlags nSubmitFlags = Submit_Default) = 0;
+
+		/** Clears the frame that was sent with the last call to Submit. This will cause the
+		 * compositor to show the grid until Submit is called again. */
+		virtual void ClearLastSubmittedFrame() = 0;
+
+		/** Call immediately after presenting your app's window (i.e. companion window) to unblock the compositor.
+		 * This is an optional call, which only needs to be used if you can't instead call WaitGetPoses immediately after Present.
+		 * For example, if your engine's render and game loop are not on separate threads, or blocking the render thread until 3ms before the next vsync would
+		 * introduce a deadlock of some sort.  This function tells the compositor that you have finished all rendering after having Submitted buffers for both
+		 * eyes, and it is free to start its rendering work.  This should only be called from the same thread you are rendering on. */
+		virtual void PostPresentHandoff() = 0;
+
+		/** Returns true if timing data is filled it.  Sets oldest timing info if nFramesAgo is larger than the stored history.
+		 * Be sure to set timing.size = sizeof(Compositor_FrameTiming) on struct passed in before calling this function. */
+		virtual bool GetFrameTiming(Compositor_FrameTiming *pTiming, uint32_t unFramesAgo = 0) = 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(VR_ARRAY_COUNT(nFrames) Compositor_FrameTiming *pTiming, uint32_t nFrames) = 0;
+
+		/** Returns the time in seconds left in the current (as identified by FrameTiming's frameIndex) frame.
+		 * Due to "running start", this value may roll over to the next frame before ever reaching 0.0. */
+		virtual float GetFrameTimeRemaining() = 0;
+
+		/** Fills out stats accumulated for the last connected application.  Pass in sizeof( Compositor_CumulativeStats ) as second parameter. */
+		virtual void GetCumulativeStats(Compositor_CumulativeStats *pStats, uint32_t nStatsSizeInBytes) = 0;
+
+		/** Fades the view on the HMD to the specified color. The fade will take fSeconds, and the color values are between
+		 * 0.0 and 1.0. This color is faded on top of the scene based on the alpha parameter. Removing the fade color instantly
+		 * would be FadeToColor( 0.0, 0.0, 0.0, 0.0, 0.0 ).  Values are in un-premultiplied alpha space. */
+		virtual void FadeToColor(float fSeconds, float fRed, float fGreen, float fBlue, float fAlpha, bool bBackground = false) = 0;
+
+		/** Get current fade color value. */
+		virtual HmdColor_t GetCurrentFadeColor(bool bBackground = false) = 0;
+
+		/** Fading the Grid in or out in fSeconds */
+		virtual void FadeGrid(float fSeconds, bool bFadeGridIn) = 0;
+
+		/** Get current alpha value of grid. */
+		virtual float GetCurrentGridAlpha() = 0;
+
+		/** Override the skybox used in the compositor (e.g. for during level loads when the app can't feed scene images fast enough)
+		 * Order is Front, Back, Left, Right, Top, Bottom.  If only a single texture is passed, it is assumed in lat-long format.
+		 * If two are passed, it is assumed a lat-long stereo pair. */
+		virtual EVRCompositorError SetSkyboxOverride(VR_ARRAY_COUNT(unTextureCount) const Texture_t *pTextures, uint32_t unTextureCount) = 0;
+
+		/** Resets compositor skybox back to defaults. */
+		virtual void ClearSkyboxOverride() = 0;
+
+		/** Brings the compositor window to the front. This is useful for covering any other window that may be on the HMD
+		 * and is obscuring the compositor window. */
+		virtual void CompositorBringToFront() = 0;
+
+		/** Pushes the compositor window to the back. This is useful for allowing other applications to draw directly to the HMD. */
+		virtual void CompositorGoToBack() = 0;
+
+		/** DEPRECATED: Tells the compositor process to clean up and exit. You do not need to call this function at shutdown.
+		 * Under normal circumstances the compositor will manage its own life cycle based on what applications are running. */
+		virtual void CompositorQuit() = 0;
+
+		/** Return whether the compositor is fullscreen */
+		virtual bool IsFullscreen() = 0;
+
+		/** Returns the process ID of the process that is currently rendering the scene */
+		virtual uint32_t GetCurrentSceneFocusProcess() = 0;
+
+		/** Returns the process ID of the process that rendered the last frame (or 0 if the compositor itself rendered the frame.)
+		 * Returns 0 when fading out from an app and the app's process Id when fading into an app. */
+		virtual uint32_t GetLastFrameRenderer() = 0;
+
+		/** Returns true if the current process has the scene focus */
+		virtual bool CanRenderScene() = 0;
+
+		/** DEPRECATED: Opens the headset view (as either a window or docked widget depending on user's preferences) that displays what the user
+		 * sees in the headset. */
+		virtual void ShowMirrorWindow() = 0;
+
+		/** DEPRECATED: Closes the headset view, either as a window or docked widget. */
+		virtual void HideMirrorWindow() = 0;
+
+		/** DEPRECATED: Returns true if the headset view (either as a window or docked widget) is shown. */
+		virtual bool IsMirrorWindowVisible() = 0;
+
+		/** Writes back buffer and stereo left/right pair from the application to a 'screenshots' folder in the SteamVR runtime root. */
+		virtual void CompositorDumpImages() = 0;
+
+		/** Let an app know it should be rendering with low resources. */
+		virtual bool ShouldAppRenderWithLowResources() = 0;
+
+		/** Override interleaved reprojection logic to force on. */
+		virtual void ForceInterleavedReprojectionOn(bool bOverride) = 0;
+
+		/** Force reconnecting to the compositor process. */
+		virtual void ForceReconnectProcess() = 0;
+
+		/** Temporarily suspends rendering (useful for finer control over scene transitions). */
+		virtual void SuspendRendering(bool bSuspend) = 0;
+
+		/** Opens a shared D3D11 texture with the undistorted composited image for each eye.  Use ReleaseMirrorTextureD3D11 when finished
+		 * instead of calling Release on the resource itself. */
+		virtual vr::EVRCompositorError GetMirrorTextureD3D11(vr::EVREye eEye, void *pD3D11DeviceOrResource, void **ppD3D11ShaderResourceView) = 0;
+		virtual void ReleaseMirrorTextureD3D11(void *pD3D11ShaderResourceView) = 0;
+
+		/** Access to mirror textures from OpenGL. */
+		virtual vr::EVRCompositorError GetMirrorTextureGL(vr::EVREye eEye, vr::glUInt_t *pglTextureId, vr::glSharedTextureHandle_t *pglSharedTextureHandle) = 0;
+		virtual bool ReleaseSharedGLTexture(vr::glUInt_t glTextureId, vr::glSharedTextureHandle_t glSharedTextureHandle) = 0;
+		virtual void LockGLSharedTextureForAccess(vr::glSharedTextureHandle_t glSharedTextureHandle) = 0;
+		virtual void UnlockGLSharedTextureForAccess(vr::glSharedTextureHandle_t glSharedTextureHandle) = 0;
+
+		/** [Vulkan Only]
+		 * return 0. Otherwise it returns the length of the number of bytes necessary to hold this string including the trailing
+		 * null.  The string will be a space separated list of-required instance extensions to enable in VkCreateInstance */
+		virtual uint32_t GetVulkanInstanceExtensionsRequired(VR_OUT_STRING() char *pchValue, uint32_t unBufferSize) = 0;
+
+		/** [Vulkan only]
+		 * return 0. Otherwise it returns the length of the number of bytes necessary to hold this string including the trailing
+		 * null.  The string will be a space separated list of required device extensions to enable in VkCreateDevice */
+		virtual uint32_t GetVulkanDeviceExtensionsRequired(VkPhysicalDevice_T *pPhysicalDevice, VR_OUT_STRING() char *pchValue, uint32_t unBufferSize) = 0;
+
+		/** [ Vulkan/D3D12 Only ]
+		 * There are two purposes for SetExplicitTimingMode:
+		 *	1. To get a more accurate GPU timestamp for when the frame begins in Vulkan/D3D12 applications.
+		 *	2. (Optional) To avoid having WaitGetPoses access the Vulkan queue so that the queue can be accessed from
+		 *	another thread while WaitGetPoses is executing.
+		 *
+		 * More accurate GPU timestamp for the start of the frame is achieved by the application calling
+		 * SubmitExplicitTimingData immediately before its first submission to the Vulkan/D3D12 queue.
+		 * This is more accurate because normally this GPU timestamp is recorded during WaitGetPoses.  In D3D11,
+		 * WaitGetPoses queues a GPU timestamp write, but it does not actually get submitted to the GPU until the
+		 * application flushes.  By using SubmitExplicitTimingData, the timestamp is recorded at the same place for
+		 * Vulkan/D3D12 as it is for D3D11, resulting in a more accurate GPU time measurement for the frame.
+		 *
+		 * Avoiding WaitGetPoses accessing the Vulkan queue can be achieved using SetExplicitTimingMode as well.  If this is desired,
+		 * the application should set the timing mode to Explicit_ApplicationPerformsPostPresentHandoff and *MUST* call PostPresentHandoff
+		 * itself. If these conditions are met, then WaitGetPoses is guaranteed not to access the queue.  Note that PostPresentHandoff
+		 * and SubmitExplicitTimingData will access the queue, so only WaitGetPoses becomes safe for accessing the queue from another
+		 * thread. */
+		virtual void SetExplicitTimingMode(EVRCompositorTimingMode eTimingMode) = 0;
+
+		/** [ Vulkan/D3D12 Only ]
+		 * Submit explicit timing data.  When SetExplicitTimingMode is true, this must be called immediately before
+		 * the application's first vkQueueSubmit (Vulkan) or ID3D12CommandQueue::ExecuteCommandLists (D3D12) of each frame.
+		 * This function will insert a GPU timestamp write just before the application starts its rendering.  This function
+		 * will perform a vkQueueSubmit on Vulkan so must not be done simultaneously with VkQueue operations on another thread.
+		 * Returns VRCompositorError_RequestFailed if SetExplicitTimingMode is not enabled. */
+		virtual EVRCompositorError SubmitExplicitTimingData() = 0;
+
+		/** Indicates whether or not motion smoothing is enabled by the user settings.
+		 * If you want to know if motion smoothing actually triggered due to a late frame, check Compositor_FrameTiming
+		 * m_nReprojectionFlags & VRCompositor_ReprojectionMotion instead. */
+		virtual bool IsMotionSmoothingEnabled() = 0;
+
+		/** Indicates whether or not motion smoothing is supported by the current hardware. */
+		virtual bool IsMotionSmoothingSupported() = 0;
+
+		/** Indicates whether or not the current scene focus app is currently loading.  This is inferred from its use of FadeGrid to
+		 * explicitly fade to the compositor to cover up the fact that it cannot render at a sustained full framerate during this time. */
+		virtual bool IsCurrentSceneFocusAppLoading() = 0;
+
+		/** Override the stage model used in the compositor to replace the grid.  RenderModelPath is a full path the an OBJ file to load.
+		 * This file will be loaded asynchronously from disk and uploaded to the gpu by the runtime.  Once ready for rendering, the
+		 * VREvent StageOverrideReady will be sent.  Use FadeToGrid to reveal.  Call ClearStageOverride to free the associated resources when finished. */
+		virtual EVRCompositorError SetStageOverride_Async(const char *pchRenderModelPath, const HmdMatrix34_t *pTransform = 0,
+														  const Compositor_StageRenderSettings *pRenderSettings = 0, uint32_t nSizeOfRenderSettings = 0) = 0;
+
+		/** Resets the stage to its default user specified setting. */
+		virtual void ClearStageOverride() = 0;
+
+		/** Returns true if pBenchmarkResults is filled it.  Sets pBenchmarkResults with the result of the compositor benchmark.
+		 * nSizeOfBenchmarkResults should be set to sizeof(Compositor_BenchmarkResults) */
+		virtual bool GetCompositorBenchmarkResults(Compositor_BenchmarkResults *pBenchmarkResults, uint32_t nSizeOfBenchmarkResults) = 0;
+
+		/** Returns the frame id associated with the poses last returned by WaitGetPoses.  Deltas between IDs correspond to number of headset vsync intervals. */
+		virtual EVRCompositorError GetLastPosePredictionIDs(uint32_t *pRenderPosePredictionID, uint32_t *pGamePosePredictionID) = 0;
+
+		/** Get the most up-to-date predicted (or recorded - up to 100ms old) set of poses for a given frame id. */
+		virtual EVRCompositorError GetPosesForFrame(uint32_t unPosePredictionID, VR_ARRAY_COUNT(unPoseArrayCount) TrackedDevicePose_t *pPoseArray, uint32_t unPoseArrayCount) = 0;
+	};
+
+	static const char *const IVRCompositor_Version = "IVRCompositor_027";
+
+} // namespace vr
+
+// ivrheadsetview.h
+
+namespace vr
+{
+	enum HeadsetViewMode_t
+	{
+		HeadsetViewMode_Left = 0,
+		HeadsetViewMode_Right,
+		HeadsetViewMode_Both
+	};
+
+	class IVRHeadsetView
+	{
+	public:
+		/** Sets the resolution in pixels to render the headset view. These values are clamped to k_unHeadsetViewMaxWidth
+		 * and k_unHeadsetViewMaxHeight respectively. For cropped views, the rendered output will be fit to aspect ratio
+		 * defined by the the specified dimensions. For uncropped views, the caller should use GetHeadsetViewAspectRation
+		 * to adjust the requested render size to avoid squashing or stretching, and then apply letterboxing to compensate
+		 * when displaying the results. */
+		virtual void SetHeadsetViewSize(uint32_t nWidth, uint32_t nHeight) = 0;
+
+		/** Gets the current resolution used to render the headset view. */
+		virtual void GetHeadsetViewSize(uint32_t *pnWidth, uint32_t *pnHeight) = 0;
+
+		/** Set the mode used to render the headset view. */
+		virtual void SetHeadsetViewMode(HeadsetViewMode_t eHeadsetViewMode) = 0;
+
+		/** Get the current mode used to render the headset view. */
+		virtual HeadsetViewMode_t GetHeadsetViewMode() = 0;
+
+		/** Set whether or not the headset view should be rendered cropped to hide the hidden area mesh or not. */
+		virtual void SetHeadsetViewCropped(bool bCropped) = 0;
+
+		/** Get the current cropping status of the headset view. */
+		virtual bool GetHeadsetViewCropped() = 0;
+
+		/** Get the aspect ratio (width:height) of the uncropped headset view (accounting for the current set mode). */
+		virtual float GetHeadsetViewAspectRatio() = 0;
+
+		/** Set the range [0..1] that the headset view blends across the stereo overlapped area in cropped both mode. */
+		virtual void SetHeadsetViewBlendRange(float flStartPct, float flEndPct) = 0;
+
+		/** Get the current range [0..1] that the headset view blends across the stereo overlapped area in cropped both mode. */
+		virtual void GetHeadsetViewBlendRange(float *pStartPct, float *pEndPct) = 0;
+	};
+
+	static const uint32_t k_unHeadsetViewMaxWidth = 3840;
+	static const uint32_t k_unHeadsetViewMaxHeight = 2160;
+	static const char *const k_pchHeadsetViewOverlayKey = "system.HeadsetView";
+
+	static const char *const IVRHeadsetView_Version = "IVRHeadsetView_001";
+
+	/** Returns the current IVRHeadsetView pointer or NULL the interface could not be found. */
+	VR_INTERFACE vr::IVRHeadsetView *VR_CALLTYPE VRHeadsetView();
+
+} // namespace vr
+
+// ivrnotifications.h
+
+namespace vr
+{
+
+#pragma pack(push, 8)
+
+	// Used for passing graphic data
+	struct NotificationBitmap_t
+	{
+		NotificationBitmap_t()
+			: m_pImageData(nullptr), m_nWidth(0), m_nHeight(0), m_nBytesPerPixel(0)
+		{
+		}
+
+		void *m_pImageData;
+		int32_t m_nWidth;
+		int32_t m_nHeight;
+		int32_t m_nBytesPerPixel;
+	};
+
+	/** Be aware that the notification type is used as 'priority' to pick the next notification */
+	enum EVRNotificationType
+	{
+		/** Transient notifications are automatically hidden after a period of time set by the user.
+		 * They are used for things like information and chat messages that do not require user interaction. */
+		EVRNotificationType_Transient = 0,
+
+		/** Persistent notifications are shown to the user until they are hidden by calling RemoveNotification().
+		 * They are used for things like phone calls and alarms that require user interaction. */
+		EVRNotificationType_Persistent = 1,
+
+		/** System notifications are shown no matter what. It is expected, that the ulUserValue is used as ID.
+		 * If there is already a system notification in the queue with that ID it is not accepted into the queue
+		 * to prevent spamming with system notification */
+		EVRNotificationType_Transient_SystemWithUserValue = 2,
+	};
+
+	enum EVRNotificationStyle
+	{
+		/** Creates a notification with minimal external styling. */
+		EVRNotificationStyle_None = 0,
+
+		/** Used for notifications about overlay-level status. In Steam this is used for events like downloads completing. */
+		EVRNotificationStyle_Application = 100,
+
+		/** Used for notifications about contacts that are unknown or not available. In Steam this is used for friend invitations and offline friends. */
+		EVRNotificationStyle_Contact_Disabled = 200,
+
+		/** Used for notifications about contacts that are available but inactive. In Steam this is used for friends that are online but not playing a game. */
+		EVRNotificationStyle_Contact_Enabled = 201,
+
+		/** Used for notifications about contacts that are available and active. In Steam this is used for friends that are online and currently running a game. */
+		EVRNotificationStyle_Contact_Active = 202,
+	};
+
+	static const uint32_t k_unNotificationTextMaxSize = 256;
+
+	typedef uint32_t VRNotificationId;
+
+#pragma pack(pop)
+
+	/** Allows notification sources to interact with the VR system. */
+	class IVRNotifications
+	{
+	public:
+		/** Create a notification and enqueue it to be shown to the user.
+		 * An overlay handle is required to create a notification, as otherwise it would be impossible for a user to act on it.
+		 * To create a two-line notification, use a line break ('\n') to split the text into two lines.
+		 * The pImage argument may be NULL, in which case the specified overlay's icon will be used instead. */
+		virtual EVRNotificationError CreateNotification(VROverlayHandle_t ulOverlayHandle, uint64_t ulUserValue, EVRNotificationType type, const char *pchText, EVRNotificationStyle style, const NotificationBitmap_t *pImage, /* out */ VRNotificationId *pNotificationId) = 0;
+
+		/** Destroy a notification, hiding it first if it currently shown to the user. */
+		virtual EVRNotificationError RemoveNotification(VRNotificationId notificationId) = 0;
+	};
+
+	static const char *const IVRNotifications_Version = "IVRNotifications_002";
+
+} // namespace vr
+
+// ivroverlay.h
+
+namespace vr
+{
+
+	/** The maximum length of an overlay key in bytes, counting the terminating null character. */
+	static const uint32_t k_unVROverlayMaxKeyLength = 128;
+
+	/** The maximum length of an overlay name in bytes, counting the terminating null character. */
+	static const uint32_t k_unVROverlayMaxNameLength = 128;
+
+	/** The maximum number of overlays that can exist in the system at one time. */
+	static const uint32_t k_unMaxOverlayCount = 128;
+
+	/** The maximum number of overlay intersection mask primitives per overlay */
+	static const uint32_t k_unMaxOverlayIntersectionMaskPrimitivesCount = 32;
+
+	/** Types of input supported by VR Overlays */
+	enum VROverlayInputMethod
+	{
+		VROverlayInputMethod_None = 0,	// No input events will be generated automatically for this overlay
+		VROverlayInputMethod_Mouse = 1, // Tracked controllers will get mouse events automatically
+										// VROverlayInputMethod_DualAnalog = 2, // No longer supported
+	};
+
+	/** Allows the caller to figure out which overlay transform getter to call. */
+	enum VROverlayTransformType
+	{
+		VROverlayTransform_Invalid = -1,
+		VROverlayTransform_Absolute = 0,
+		VROverlayTransform_TrackedDeviceRelative = 1,
+		VROverlayTransform_SystemOverlay = 2,
+		VROverlayTransform_TrackedComponent = 3,
+		VROverlayTransform_Cursor = 4,
+		VROverlayTransform_DashboardTab = 5,
+		VROverlayTransform_DashboardThumb = 6,
+		VROverlayTransform_Mountable = 7,
+		VROverlayTransform_Projection = 8,
+	};
+
+	/** Overlay control settings */
+	enum VROverlayFlags
+	{
+		// Set this flag on a dashboard overlay to prevent a tab from showing up for that overlay
+		VROverlayFlags_NoDashboardTab = 1 << 3,
+
+		// When this is set the overlay will receive VREvent_ScrollDiscrete events like a mouse wheel.
+		// Requires mouse input mode.
+		VROverlayFlags_SendVRDiscreteScrollEvents = 1 << 6,
+
+		// Indicates that the overlay would like to receive
+		VROverlayFlags_SendVRTouchpadEvents = 1 << 7,
+
+		// If set this will render a vertical scroll wheel on the primary controller,
+		//  only needed if not using VROverlayFlags_SendVRScrollEvents but you still want to represent a scroll wheel
+		VROverlayFlags_ShowTouchPadScrollWheel = 1 << 8,
+
+		// If this is set ownership and render access to the overlay are transferred
+		// to the new scene process on a call to IVRApplications::LaunchInternalProcess
+		VROverlayFlags_TransferOwnershipToInternalProcess = 1 << 9,
+
+		// If set, renders 50% of the texture in each eye, side by side
+		VROverlayFlags_SideBySide_Parallel = 1 << 10, // Texture is left/right
+		VROverlayFlags_SideBySide_Crossed = 1 << 11,  // Texture is crossed and right/left
+
+		VROverlayFlags_Panorama = 1 << 12,		 // Texture is a panorama
+		VROverlayFlags_StereoPanorama = 1 << 13, // Texture is a stereo panorama
+
+		// If this is set on an overlay owned by the scene application that overlay
+		// will be sorted with the "Other" overlays on top of all other scene overlays
+		VROverlayFlags_SortWithNonSceneOverlays = 1 << 14,
+
+		// If set, the overlay will be shown in the dashboard, otherwise it will be hidden.
+		VROverlayFlags_VisibleInDashboard = 1 << 15,
+
+		// If this is set and the overlay's input method is not none, the system-wide laser mouse
+		// mode will be activated whenever this overlay is visible.
+		VROverlayFlags_MakeOverlaysInteractiveIfVisible = 1 << 16,
+
+		// If this is set the overlay will receive smooth VREvent_ScrollSmooth that emulate trackpad scrolling.
+		// Requires mouse input mode.
+		VROverlayFlags_SendVRSmoothScrollEvents = 1 << 17,
+
+		// If this is set, the overlay texture will be protected content, preventing unauthorized reads.
+		VROverlayFlags_ProtectedContent = 1 << 18,
+
+		// If this is set, the laser mouse splat will not be drawn over this overlay. The overlay will
+		// be responsible for drawing its own "cursor".
+		VROverlayFlags_HideLaserIntersection = 1 << 19,
+
+		// If this is set, clicking away from the overlay will cause it to receive a VREvent_Modal_Cancel event.
+		// This is ignored for dashboard overlays.
+		VROverlayFlags_WantsModalBehavior = 1 << 20,
+
+		// If this is set, alpha composition assumes the texture is pre-multiplied
+		VROverlayFlags_IsPremultiplied = 1 << 21,
+
+		// If this is set, the alpha values of the overlay texture will be ignored
+		VROverlayFlags_IgnoreTextureAlpha = 1 << 22,
+	};
+
+	enum VRMessageOverlayResponse
+	{
+		VRMessageOverlayResponse_ButtonPress_0 = 0,
+		VRMessageOverlayResponse_ButtonPress_1 = 1,
+		VRMessageOverlayResponse_ButtonPress_2 = 2,
+		VRMessageOverlayResponse_ButtonPress_3 = 3,
+		VRMessageOverlayResponse_CouldntFindSystemOverlay = 4,
+		VRMessageOverlayResponse_CouldntFindOrCreateClientOverlay = 5,
+		VRMessageOverlayResponse_ApplicationQuit = 6
+	};
+
+	struct VROverlayIntersectionParams_t
+	{
+		HmdVector3_t vSource;
+		HmdVector3_t vDirection;
+		ETrackingUniverseOrigin eOrigin;
+	};
+
+	struct VROverlayIntersectionResults_t
+	{
+		HmdVector3_t vPoint;
+		HmdVector3_t vNormal;
+		HmdVector2_t vUVs;
+		float fDistance;
+	};
+
+	// Input modes for the Big Picture gamepad text entry
+	enum EGamepadTextInputMode
+	{
+		k_EGamepadTextInputModeNormal = 0,
+		k_EGamepadTextInputModePassword = 1,
+		k_EGamepadTextInputModeSubmit = 2,
+	};
+
+	// Controls number of allowed lines for the Big Picture gamepad text entry
+	enum EGamepadTextInputLineMode
+	{
+		k_EGamepadTextInputLineModeSingleLine = 0,
+		k_EGamepadTextInputLineModeMultipleLines = 1
+	};
+
+	enum EVROverlayIntersectionMaskPrimitiveType
+	{
+		OverlayIntersectionPrimitiveType_Rectangle,
+		OverlayIntersectionPrimitiveType_Circle,
+	};
+
+	struct IntersectionMaskRectangle_t
+	{
+		float m_flTopLeftX;
+		float m_flTopLeftY;
+		float m_flWidth;
+		float m_flHeight;
+	};
+
+	struct IntersectionMaskCircle_t
+	{
+		float m_flCenterX;
+		float m_flCenterY;
+		float m_flRadius;
+	};
+
+	/** NOTE!!! If you change this you MUST manually update openvr_interop.cs.py and openvr_api_flat.h.py */
+	typedef union
+	{
+		IntersectionMaskRectangle_t m_Rectangle;
+		IntersectionMaskCircle_t m_Circle;
+	} VROverlayIntersectionMaskPrimitive_Data_t;
+
+	struct VROverlayIntersectionMaskPrimitive_t
+	{
+		EVROverlayIntersectionMaskPrimitiveType m_nPrimitiveType;
+		VROverlayIntersectionMaskPrimitive_Data_t m_Primitive;
+	};
+
+	enum EKeyboardFlags
+	{
+		KeyboardFlag_Minimal = 1 << 0, // makes the keyboard send key events immediately instead of accumulating a buffer
+		KeyboardFlag_Modal = 2 << 0,   // makes the keyboard take all focus and dismiss when clicking off the panel
+	};
+
+	/** Defines the project used in an overlay that is using SetOverlayTransformProjection */
+	struct VROverlayProjection_t
+	{
+		/** Tangent of the sides of the frustum */
+		float fLeft;
+		float fRight;
+		float fTop;
+		float fBottom;
+	};
+
+	class IVROverlay
+	{
+	public:
+		// ---------------------------------------------
+		// Overlay management methods
+		// ---------------------------------------------
+
+		/** Finds an existing overlay with the specified key. */
+		virtual EVROverlayError FindOverlay(const char *pchOverlayKey, VROverlayHandle_t *pOverlayHandle) = 0;
+
+		/** Creates a new named overlay. All overlays start hidden and with default settings. */
+		virtual EVROverlayError CreateOverlay(const char *pchOverlayKey, const char *pchOverlayName, VROverlayHandle_t *pOverlayHandle) = 0;
+
+		/** Destroys the specified overlay. When an application calls VR_Shutdown all overlays created by that app are
+		 * automatically destroyed. */
+		virtual EVROverlayError DestroyOverlay(VROverlayHandle_t ulOverlayHandle) = 0;
+
+		/** Fills the provided buffer with the string key of the overlay. Returns the size of buffer required to store the key, including
+		 * the terminating null character. k_unVROverlayMaxKeyLength will be enough bytes to fit the string. */
+		virtual uint32_t GetOverlayKey(VROverlayHandle_t ulOverlayHandle, VR_OUT_STRING() char *pchValue, uint32_t unBufferSize, EVROverlayError *pError = 0L) = 0;
+
+		/** Fills the provided buffer with the friendly name of the overlay. Returns the size of buffer required to store the key, including
+		 * the terminating null character. k_unVROverlayMaxNameLength will be enough bytes to fit the string. */
+		virtual uint32_t GetOverlayName(VROverlayHandle_t ulOverlayHandle, VR_OUT_STRING() char *pchValue, uint32_t unBufferSize, EVROverlayError *pError = 0L) = 0;
+
+		/** set the name to use for this overlay */
+		virtual EVROverlayError SetOverlayName(VROverlayHandle_t ulOverlayHandle, const char *pchName) = 0;
+
+		/** Gets the raw image data from an overlay. Overlay image data is always returned as RGBA data, 4 bytes per pixel. If the buffer is not large enough, width and height
+		 * will be set and VROverlayError_ArrayTooSmall is returned. */
+		virtual EVROverlayError GetOverlayImageData(VROverlayHandle_t ulOverlayHandle, void *pvBuffer, uint32_t unBufferSize, uint32_t *punWidth, uint32_t *punHeight) = 0;
+
+		/** returns a string that corresponds with the specified overlay error. The string will be the name
+		 * of the error enum value for all valid error codes */
+		virtual const char *GetOverlayErrorNameFromEnum(EVROverlayError error) = 0;
+
+		// ---------------------------------------------
+		// Overlay rendering methods
+		// ---------------------------------------------
+
+		/** Sets the pid that is allowed to render to this overlay (the creator pid is always allow to render),
+		 *	by default this is the pid of the process that made the overlay */
+		virtual EVROverlayError SetOverlayRenderingPid(VROverlayHandle_t ulOverlayHandle, uint32_t unPID) = 0;
+
+		/** Gets the pid that is allowed to render to this overlay */
+		virtual uint32_t GetOverlayRenderingPid(VROverlayHandle_t ulOverlayHandle) = 0;
+
+		/** Specify flag setting for a given overlay */
+		virtual EVROverlayError SetOverlayFlag(VROverlayHandle_t ulOverlayHandle, VROverlayFlags eOverlayFlag, bool bEnabled) = 0;
+
+		/** Sets flag setting for a given overlay */
+		virtual EVROverlayError GetOverlayFlag(VROverlayHandle_t ulOverlayHandle, VROverlayFlags eOverlayFlag, bool *pbEnabled) = 0;
+
+		/** Gets all the flags for a given overlay */
+		virtual EVROverlayError GetOverlayFlags(VROverlayHandle_t ulOverlayHandle, uint32_t *pFlags) = 0;
+
+		/** Sets the color tint of the overlay quad. Use 0.0 to 1.0 per channel. */
+		virtual EVROverlayError SetOverlayColor(VROverlayHandle_t ulOverlayHandle, float fRed, float fGreen, float fBlue) = 0;
+
+		/** Gets the color tint of the overlay quad. */
+		virtual EVROverlayError GetOverlayColor(VROverlayHandle_t ulOverlayHandle, float *pfRed, float *pfGreen, float *pfBlue) = 0;
+
+		/** Sets the alpha of the overlay quad. Use 1.0 for 100 percent opacity to 0.0 for 0 percent opacity. */
+		virtual EVROverlayError SetOverlayAlpha(VROverlayHandle_t ulOverlayHandle, float fAlpha) = 0;
+
+		/** Gets the alpha of the overlay quad. By default overlays are rendering at 100 percent alpha (1.0). */
+		virtual EVROverlayError GetOverlayAlpha(VROverlayHandle_t ulOverlayHandle, float *pfAlpha) = 0;
+
+		/** Sets the aspect ratio of the texels in the overlay. 1.0 means the texels are square. 2.0 means the texels
+		 * are twice as wide as they are tall. Defaults to 1.0. */
+		virtual EVROverlayError SetOverlayTexelAspect(VROverlayHandle_t ulOverlayHandle, float fTexelAspect) = 0;
+
+		/** Gets the aspect ratio of the texels in the overlay. Defaults to 1.0 */
+		virtual EVROverlayError GetOverlayTexelAspect(VROverlayHandle_t ulOverlayHandle, float *pfTexelAspect) = 0;
+
+		/** Sets the rendering sort order for the overlay. Overlays are rendered this order:
+		 *      Overlays owned by the scene application
+		 *      Overlays owned by some other application
+		 *
+		 *	Within a category overlays are rendered lowest sort order to highest sort order. Overlays with the same
+		 *	sort order are rendered back to front base on distance from the HMD.
+		 *
+		 *	Sort order defaults to 0. */
+		virtual EVROverlayError SetOverlaySortOrder(VROverlayHandle_t ulOverlayHandle, uint32_t unSortOrder) = 0;
+
+		/** Gets the sort order of the overlay. See SetOverlaySortOrder for how this works. */
+		virtual EVROverlayError GetOverlaySortOrder(VROverlayHandle_t ulOverlayHandle, uint32_t *punSortOrder) = 0;
+
+		/** Sets the width of the overlay quad in meters. By default overlays are rendered on a quad that is 1 meter across */
+		virtual EVROverlayError SetOverlayWidthInMeters(VROverlayHandle_t ulOverlayHandle, float fWidthInMeters) = 0;
+
+		/** Returns the width of the overlay quad in meters. By default overlays are rendered on a quad that is 1 meter across */
+		virtual EVROverlayError GetOverlayWidthInMeters(VROverlayHandle_t ulOverlayHandle, float *pfWidthInMeters) = 0;
+
+		/** Use to draw overlay as a curved surface. Curvature is a percentage from (0..1] where 1 is a fully closed cylinder.
+		 * For a specific radius, curvature can be computed as: overlay.width / (2 PI r). */
+		virtual EVROverlayError SetOverlayCurvature(VROverlayHandle_t ulOverlayHandle, float fCurvature) = 0;
+
+		/** Returns the curvature of the overlay as a percentage from (0..1] where 1 is a fully closed cylinder. */
+		virtual EVROverlayError GetOverlayCurvature(VROverlayHandle_t ulOverlayHandle, float *pfCurvature) = 0;
+
+		/** Sets the pitch angle (in radians) of the overlay before curvature is applied -- to form a fan or disk. */
+		virtual EVROverlayError SetOverlayPreCurvePitch(VROverlayHandle_t ulOverlayHandle, float fRadians) = 0;
+
+		/** Returns the overlay's set pre-curve pitch angle (in radians). */
+		virtual EVROverlayError GetOverlayPreCurvePitch(VROverlayHandle_t ulOverlayHandle, float *pfRadians) = 0;
+
+		/** Sets the colorspace the overlay texture's data is in.  Defaults to 'auto'.
+		 * If the texture needs to be resolved, you should call SetOverlayTexture with the appropriate colorspace instead. */
+		virtual EVROverlayError SetOverlayTextureColorSpace(VROverlayHandle_t ulOverlayHandle, EColorSpace eTextureColorSpace) = 0;
+
+		/** Gets the overlay's current colorspace setting. */
+		virtual EVROverlayError GetOverlayTextureColorSpace(VROverlayHandle_t ulOverlayHandle, EColorSpace *peTextureColorSpace) = 0;
+
+		/** Sets the part of the texture to use for the overlay. UV Min is the upper left corner and UV Max is the lower right corner. */
+		virtual EVROverlayError SetOverlayTextureBounds(VROverlayHandle_t ulOverlayHandle, const VRTextureBounds_t *pOverlayTextureBounds) = 0;
+
+		/** Gets the part of the texture to use for the overlay. UV Min is the upper left corner and UV Max is the lower right corner. */
+		virtual EVROverlayError GetOverlayTextureBounds(VROverlayHandle_t ulOverlayHandle, VRTextureBounds_t *pOverlayTextureBounds) = 0;
+
+		/** Returns the transform type of this overlay. */
+		virtual EVROverlayError GetOverlayTransformType(VROverlayHandle_t ulOverlayHandle, VROverlayTransformType *peTransformType) = 0;
+
+		/** Sets the transform to absolute tracking origin. */
+		virtual EVROverlayError SetOverlayTransformAbsolute(VROverlayHandle_t ulOverlayHandle, ETrackingUniverseOrigin eTrackingOrigin, const HmdMatrix34_t *pmatTrackingOriginToOverlayTransform) = 0;
+
+		/** Gets the transform if it is absolute. Returns an error if the transform is some other type. */
+		virtual EVROverlayError GetOverlayTransformAbsolute(VROverlayHandle_t ulOverlayHandle, ETrackingUniverseOrigin *peTrackingOrigin, HmdMatrix34_t *pmatTrackingOriginToOverlayTransform) = 0;
+
+		/** Sets the transform to relative to the transform of the specified tracked device. */
+		virtual EVROverlayError SetOverlayTransformTrackedDeviceRelative(VROverlayHandle_t ulOverlayHandle, TrackedDeviceIndex_t unTrackedDevice, const HmdMatrix34_t *pmatTrackedDeviceToOverlayTransform) = 0;
+
+		/** Gets the transform if it is relative to a tracked device. Returns an error if the transform is some other type. */
+		virtual EVROverlayError GetOverlayTransformTrackedDeviceRelative(VROverlayHandle_t ulOverlayHandle, TrackedDeviceIndex_t *punTrackedDevice, HmdMatrix34_t *pmatTrackedDeviceToOverlayTransform) = 0;
+
+		/** Sets the transform to draw the overlay on a rendermodel component mesh instead of a quad. This will only draw when the system is
+		 * drawing the device. Overlays with this transform type cannot receive mouse events. */
+		virtual EVROverlayError SetOverlayTransformTrackedDeviceComponent(VROverlayHandle_t ulOverlayHandle, TrackedDeviceIndex_t unDeviceIndex, const char *pchComponentName) = 0;
+
+		/** Gets the transform information when the overlay is rendering on a component. */
+		virtual EVROverlayError GetOverlayTransformTrackedDeviceComponent(VROverlayHandle_t ulOverlayHandle, TrackedDeviceIndex_t *punDeviceIndex, VR_OUT_STRING() char *pchComponentName, uint32_t unComponentNameSize) = 0;
+
+		/** Gets the transform if it is relative to another overlay. Returns an error if the transform is some other type. */
+		virtual vr::EVROverlayError GetOverlayTransformOverlayRelative(VROverlayHandle_t ulOverlayHandle, VROverlayHandle_t *ulOverlayHandleParent, HmdMatrix34_t *pmatParentOverlayToOverlayTransform) = 0;
+
+		/** Sets the transform to relative to the transform of the specified overlay. This overlays visibility will also track the parents visibility */
+		virtual vr::EVROverlayError SetOverlayTransformOverlayRelative(VROverlayHandle_t ulOverlayHandle, VROverlayHandle_t ulOverlayHandleParent, const HmdMatrix34_t *pmatParentOverlayToOverlayTransform) = 0;
+
+		/** Sets the hotspot for the specified overlay when that overlay is used as a cursor. These are in texture space with 0,0 in the upper left corner of
+		 * the texture and 1,1 in the lower right corner of the texture. */
+		virtual EVROverlayError SetOverlayTransformCursor(VROverlayHandle_t ulCursorOverlayHandle, const HmdVector2_t *pvHotspot) = 0;
+
+		/** Gets cursor hotspot/transform for the specified overlay */
+		virtual vr::EVROverlayError GetOverlayTransformCursor(VROverlayHandle_t ulOverlayHandle, HmdVector2_t *pvHotspot) = 0;
+
+		/** Sets the overlay as a projection overlay */
+		virtual vr::EVROverlayError SetOverlayTransformProjection(VROverlayHandle_t ulOverlayHandle,
+																  ETrackingUniverseOrigin eTrackingOrigin, const HmdMatrix34_t *pmatTrackingOriginToOverlayTransform,
+																  const VROverlayProjection_t *pProjection, vr::EVREye eEye) = 0;
+
+		/** Shows the VR overlay.  For dashboard overlays, only the Dashboard Manager is allowed to call this. */
+		virtual EVROverlayError ShowOverlay(VROverlayHandle_t ulOverlayHandle) = 0;
+
+		/** Hides the VR overlay.  For dashboard overlays, only the Dashboard Manager is allowed to call this. */
+		virtual EVROverlayError HideOverlay(VROverlayHandle_t ulOverlayHandle) = 0;
+
+		/** Returns true if the overlay is visible. */
+		virtual bool IsOverlayVisible(VROverlayHandle_t ulOverlayHandle) = 0;
+
+		/** Get the transform in 3d space associated with a specific 2d point in the overlay's coordinate space (where 0,0 is the lower left). -Z points out of the overlay */
+		virtual EVROverlayError GetTransformForOverlayCoordinates(VROverlayHandle_t ulOverlayHandle, ETrackingUniverseOrigin eTrackingOrigin, HmdVector2_t coordinatesInOverlay, HmdMatrix34_t *pmatTransform) = 0;
+
+		/** This function will block until the top of each frame, and can therefore be used to synchronize with the runtime's update rate.
+		 * Note: In non-async mode, some signals may be dropped due to scene app performance, so passing a timeout of 1000/refresh rate
+		 * may be useful depending on the overlay app's desired behavior. */
+		virtual EVROverlayError WaitFrameSync(uint32_t nTimeoutMs) = 0;
+
+		// ---------------------------------------------
+		// Overlay input methods
+		// ---------------------------------------------
+
+		/** Returns true and fills the event with the next event on the overlay's event queue, if there is one.
+		 * If there are no events this method returns false. uncbVREvent should be the size in bytes of the VREvent_t struct */
+		virtual bool PollNextOverlayEvent(VROverlayHandle_t ulOverlayHandle, VREvent_t *pEvent, uint32_t uncbVREvent) = 0;
+
+		/** Returns the current input settings for the specified overlay. */
+		virtual EVROverlayError GetOverlayInputMethod(VROverlayHandle_t ulOverlayHandle, VROverlayInputMethod *peInputMethod) = 0;
+
+		/** Sets the input settings for the specified overlay. */
+		virtual EVROverlayError SetOverlayInputMethod(VROverlayHandle_t ulOverlayHandle, VROverlayInputMethod eInputMethod) = 0;
+
+		/** Gets the mouse scaling factor that is used for mouse events. The actual texture may be a different size, but this is
+		 * typically the size of the underlying UI in pixels. */
+		virtual EVROverlayError GetOverlayMouseScale(VROverlayHandle_t ulOverlayHandle, HmdVector2_t *pvecMouseScale) = 0;
+
+		/** Sets the mouse scaling factor that is used for mouse events. The actual texture may be a different size, but this is
+		 * typically the size of the underlying UI in pixels (not in world space). */
+		virtual EVROverlayError SetOverlayMouseScale(VROverlayHandle_t ulOverlayHandle, const HmdVector2_t *pvecMouseScale) = 0;
+
+		/** Computes the overlay-space pixel coordinates of where the ray intersects the overlay with the
+		 * specified settings. Returns false if there is no intersection. */
+		virtual bool ComputeOverlayIntersection(VROverlayHandle_t ulOverlayHandle, const VROverlayIntersectionParams_t *pParams, VROverlayIntersectionResults_t *pResults) = 0;
+
+		/** Returns true if the specified overlay is the hover target. An overlay is the hover target when it is the last overlay "moused over"
+		 * by the virtual mouse pointer */
+		virtual bool IsHoverTargetOverlay(VROverlayHandle_t ulOverlayHandle) = 0;
+
+		/** Sets a list of primitives to be used for controller ray intersection
+		 * typically the size of the underlying UI in pixels (not in world space). */
+		virtual EVROverlayError SetOverlayIntersectionMask(VROverlayHandle_t ulOverlayHandle, VROverlayIntersectionMaskPrimitive_t *pMaskPrimitives, uint32_t unNumMaskPrimitives, uint32_t unPrimitiveSize = sizeof(VROverlayIntersectionMaskPrimitive_t)) = 0;
+
+		/** Triggers a haptic event on the laser mouse controller for the specified overlay */
+		virtual EVROverlayError TriggerLaserMouseHapticVibration(VROverlayHandle_t ulOverlayHandle, float fDurationSeconds, float fFrequency, float fAmplitude) = 0;
+
+		/** Sets the cursor to use for the specified overlay. This will be drawn instead of the generic blob when the laser mouse is pointed at the specified overlay */
+		virtual EVROverlayError SetOverlayCursor(VROverlayHandle_t ulOverlayHandle, VROverlayHandle_t ulCursorHandle) = 0;
+
+		/** Sets the override cursor position to use for this overlay in overlay mouse coordinates. This position will be used to draw the cursor
+		 * instead of whatever the laser mouse cursor position is. */
+		virtual EVROverlayError SetOverlayCursorPositionOverride(VROverlayHandle_t ulOverlayHandle, const HmdVector2_t *pvCursor) = 0;
+
+		/** Clears the override cursor position for this overlay */
+		virtual EVROverlayError ClearOverlayCursorPositionOverride(VROverlayHandle_t ulOverlayHandle) = 0;
+
+		// ---------------------------------------------
+		// Overlay texture methods
+		// ---------------------------------------------
+
+		/** Texture to draw for the overlay. This function can only be called by the overlay's creator or renderer process (see SetOverlayRenderingPid) .
+		 *
+		 * OpenGL dirty state:
+		 *	glBindTexture
+		 */
+		virtual EVROverlayError SetOverlayTexture(VROverlayHandle_t ulOverlayHandle, const Texture_t *pTexture) = 0;
+
+		/** Use this to tell the overlay system to release the texture set for this overlay. */
+		virtual EVROverlayError ClearOverlayTexture(VROverlayHandle_t ulOverlayHandle) = 0;
+
+		/** Separate interface for providing the data as a stream of bytes, but there is an upper bound on data
+		 * that can be sent. This function can only be called by the overlay's renderer process. */
+		virtual EVROverlayError SetOverlayRaw(VROverlayHandle_t ulOverlayHandle, void *pvBuffer, uint32_t unWidth, uint32_t unHeight, uint32_t unBytesPerPixel) = 0;
+
+		/** Separate interface for providing the image through a filename: can be png or jpg, and should not be bigger than 1920x1080.
+		 * This function can only be called by the overlay's renderer process */
+		virtual EVROverlayError SetOverlayFromFile(VROverlayHandle_t ulOverlayHandle, const char *pchFilePath) = 0;
+
+		/** Get the native texture handle/device for an overlay you have created.
+		 * On windows this handle will be a ID3D11ShaderResourceView with a ID3D11Texture2D bound.
+		 *
+		 * The texture will always be sized to match the backing texture you supplied in SetOverlayTexture above.
+		 *
+		 * You MUST call ReleaseNativeOverlayHandle() with pNativeTextureHandle once you are done with this texture.
+		 *
+		 * pNativeTextureHandle is an OUTPUT, it will be a pointer to a ID3D11ShaderResourceView *.
+		 * pNativeTextureRef is an INPUT and should be a ID3D11Resource *. The device used by pNativeTextureRef will be used to bind pNativeTextureHandle.
+		 */
+		virtual EVROverlayError GetOverlayTexture(VROverlayHandle_t ulOverlayHandle, void **pNativeTextureHandle, void *pNativeTextureRef, uint32_t *pWidth, uint32_t *pHeight, uint32_t *pNativeFormat, ETextureType *pAPIType, EColorSpace *pColorSpace, VRTextureBounds_t *pTextureBounds) = 0;
+
+		/** Release the pNativeTextureHandle provided from the GetOverlayTexture call, this allows the system to free the underlying GPU resources for this object,
+		 * so only do it once you stop rendering this texture.
+		 */
+		virtual EVROverlayError ReleaseNativeOverlayHandle(VROverlayHandle_t ulOverlayHandle, void *pNativeTextureHandle) = 0;
+
+		/** Get the size of the overlay texture */
+		virtual EVROverlayError GetOverlayTextureSize(VROverlayHandle_t ulOverlayHandle, uint32_t *pWidth, uint32_t *pHeight) = 0;
+
+		// ----------------------------------------------
+		// Dashboard Overlay Methods
+		// ----------------------------------------------
+
+		/** Creates a dashboard overlay and returns its handle */
+		virtual EVROverlayError CreateDashboardOverlay(const char *pchOverlayKey, const char *pchOverlayFriendlyName, VROverlayHandle_t *pMainHandle, VROverlayHandle_t *pThumbnailHandle) = 0;
+
+		/** Returns true if the dashboard is visible */
+		virtual bool IsDashboardVisible() = 0;
+
+		/** returns true if the dashboard is visible and the specified overlay is the active system Overlay */
+		virtual bool IsActiveDashboardOverlay(VROverlayHandle_t ulOverlayHandle) = 0;
+
+		/** Sets the dashboard overlay to only appear when the specified process ID has scene focus */
+		virtual EVROverlayError SetDashboardOverlaySceneProcess(VROverlayHandle_t ulOverlayHandle, uint32_t unProcessId) = 0;
+
+		/** Gets the process ID that this dashboard overlay requires to have scene focus */
+		virtual EVROverlayError GetDashboardOverlaySceneProcess(VROverlayHandle_t ulOverlayHandle, uint32_t *punProcessId) = 0;
+
+		/** Shows the dashboard. */
+		virtual void ShowDashboard(const char *pchOverlayToShow) = 0;
+
+		/** Returns the tracked device that has the laser pointer in the dashboard */
+		virtual vr::TrackedDeviceIndex_t GetPrimaryDashboardDevice() = 0;
+
+		// ---------------------------------------------
+		// Keyboard methods
+		// ---------------------------------------------
+
+		/** Show the virtual keyboard to accept input. In most cases, you should pass KeyboardFlag_Modal to enable modal overlay
+		 * behavior on the keyboard itself. See EKeyboardFlags for more. */
+		virtual EVROverlayError ShowKeyboard(EGamepadTextInputMode eInputMode, EGamepadTextInputLineMode eLineInputMode, uint32_t unFlags,
+											 const char *pchDescription, uint32_t unCharMax, const char *pchExistingText, uint64_t uUserValue) = 0;
+
+		/** Show the virtual keyboard to accept input for an overlay. In most cases, you should pass KeyboardFlag_Modal to enable modal
+		 * overlay behavior on the keyboard itself. See EKeyboardFlags for more. */
+		virtual EVROverlayError ShowKeyboardForOverlay(VROverlayHandle_t ulOverlayHandle, EGamepadTextInputMode eInputMode,
+													   EGamepadTextInputLineMode eLineInputMode, uint32_t unFlags, const char *pchDescription, uint32_t unCharMax,
+													   const char *pchExistingText, uint64_t uUserValue) = 0;
+
+		/** Get the text that was entered into the text input **/
+		virtual uint32_t GetKeyboardText(VR_OUT_STRING() char *pchText, uint32_t cchText) = 0;
+
+		/** Hide the virtual keyboard **/
+		virtual void HideKeyboard() = 0;
+
+		/** Set the position of the keyboard in world space **/
+		virtual void SetKeyboardTransformAbsolute(ETrackingUniverseOrigin eTrackingOrigin, const HmdMatrix34_t *pmatTrackingOriginToKeyboardTransform) = 0;
+
+		/** Set the position of the keyboard in overlay space by telling it to avoid a rectangle in the overlay. Rectangle coords have (0,0) in the bottom left **/
+		virtual void SetKeyboardPositionForOverlay(VROverlayHandle_t ulOverlayHandle, HmdRect2_t avoidRect) = 0;
+
+		// ---------------------------------------------
+		// Message box methods
+		// ---------------------------------------------
+
+		/** Show the message overlay. This will block and return you a result. **/
+		virtual VRMessageOverlayResponse ShowMessageOverlay(const char *pchText, const char *pchCaption, const char *pchButton0Text, const char *pchButton1Text = nullptr, const char *pchButton2Text = nullptr, const char *pchButton3Text = nullptr) = 0;
+
+		/** If the calling process owns the overlay and it's open, this will close it. **/
+		virtual void CloseMessageOverlay() = 0;
+	};
+
+	static const char *const IVROverlay_Version = "IVROverlay_026";
+
+} // namespace vr
+
+// ivroverlayview.h
+
+namespace vr
+{
+	struct VROverlayView_t
+	{
+		VROverlayHandle_t overlayHandle;
+		Texture_t texture;
+		VRTextureBounds_t textureBounds;
+	};
+
+	enum EDeviceType
+	{
+		DeviceType_Invalid = -1,  // Invalid handle
+		DeviceType_DirectX11 = 0, // Handle is an ID3D11Device
+		DeviceType_Vulkan = 1,	  // Handle is a pointer to a VRVulkanDevice_t structure
+	};
+
+	struct VRVulkanDevice_t
+	{
+		VkInstance_T *m_pInstance;
+		VkDevice_T *m_pDevice;
+		VkPhysicalDevice_T *m_pPhysicalDevice;
+		VkQueue_T *m_pQueue;
+		uint32_t m_uQueueFamilyIndex;
+	};
+
+	struct VRNativeDevice_t
+	{
+		void *handle; // See EDeviceType definition above
+		EDeviceType eType;
+	};
+
+	class IVROverlayView
+	{
+	public:
+		/** Acquire an OverlayView_t from an overlay handle
+		 *
+		 * The overlay view can be used to sample the contents directly by a native API. The
+		 * contents of the OverlayView_t will remain unchanged through the lifetime of the
+		 * OverlayView_t.
+		 *
+		 * The caller acquires read privileges over the OverlayView_t, but should not
+		 * write to it.
+		 *
+		 * AcquireOverlayView() may be called on the same ulOverlayHandle multiple times to
+		 * refresh the image contents. In this case the caller is strongly encouraged to re-use
+		 * the same pOverlayView for all re-acquisition calls.
+		 *
+		 * If the producer has not yet queued an image, AcquireOverlayView will return success,
+		 * and the Texture_t will have the expected ETextureType. However, the Texture_t->handle
+		 * will be nullptr. Once the producer generates the first overlay frame, Texture_t->handle
+		 * will become a valid handle.
+		 */
+		virtual EVROverlayError AcquireOverlayView(VROverlayHandle_t ulOverlayHandle, VRNativeDevice_t *pNativeDevice, VROverlayView_t *pOverlayView, uint32_t unOverlayViewSize) = 0;
+
+		/** Release an acquired OverlayView_t
+		 *
+		 * Denotes that pOverlayView will no longer require access to the resources it acquired in
+		 * all previous calls to AcquireOverlayView().
+		 *
+		 * All OverlayView_t*'s provided to AcquireOverlayView() as pOverlayViews must be
+		 * passed into ReleaseOverlayView() in order for the underlying GPU resources to be freed.
+		 */
+		virtual EVROverlayError ReleaseOverlayView(VROverlayView_t *pOverlayView) = 0;
+
+		/** Posts an overlay event */
+		virtual void PostOverlayEvent(VROverlayHandle_t ulOverlayHandle, const VREvent_t *pvrEvent) = 0;
+
+		/** Determines whether this process is permitted to view an overlay's content. */
+		virtual bool IsViewingPermitted(VROverlayHandle_t ulOverlayHandle) = 0;
+	};
+
+	static const char *const IVROverlayView_Version = "IVROverlayView_003";
+
+}
+
+// ivrrendermodels.h
+
+namespace vr
+{
+
+	static const char *const k_pch_Controller_Component_GDC2015 = "gdc2015";   // Canonical coordinate system of the gdc 2015 wired controller, provided for backwards compatibility
+	static const char *const k_pch_Controller_Component_Base = "base";		   // For controllers with an unambiguous 'base'.
+	static const char *const k_pch_Controller_Component_Tip = "tip";		   // For controllers with an unambiguous 'tip' (used for 'laser-pointing')
+	static const char *const k_pch_Controller_Component_HandGrip = "handgrip"; // Neutral, ambidextrous hand-pose when holding controller. On plane between neutrally posed index finger and thumb
+	static const char *const k_pch_Controller_Component_Status = "status";	   // 1:1 aspect ratio status area, with canonical [0,1] uv mapping
+
+#pragma pack(push, 8)
+
+	/** Errors that can occur with the VR compositor */
+	enum EVRRenderModelError
+	{
+		VRRenderModelError_None = 0,
+		VRRenderModelError_Loading = 100,
+		VRRenderModelError_NotSupported = 200,
+		VRRenderModelError_InvalidArg = 300,
+		VRRenderModelError_InvalidModel = 301,
+		VRRenderModelError_NoShapes = 302,
+		VRRenderModelError_MultipleShapes = 303,
+		VRRenderModelError_TooManyVertices = 304,
+		VRRenderModelError_MultipleTextures = 305,
+		VRRenderModelError_BufferTooSmall = 306,
+		VRRenderModelError_NotEnoughNormals = 307,
+		VRRenderModelError_NotEnoughTexCoords = 308,
+
+		VRRenderModelError_InvalidTexture = 400,
+	};
+
+	enum EVRRenderModelTextureFormat
+	{
+		VRRenderModelTextureFormat_RGBA8_SRGB = 0, // RGBA with 8 bits per channel per pixel. Data size is width * height * 4ub
+		VRRenderModelTextureFormat_BC2,
+		VRRenderModelTextureFormat_BC4,
+		VRRenderModelTextureFormat_BC7,
+		VRRenderModelTextureFormat_BC7_SRGB,
+		VRRenderModelTextureFormat_RGBA16_FLOAT,
+	};
+
+	/** A single vertex in a render model */
+	struct RenderModel_Vertex_t
+	{
+		HmdVector3_t vPosition; // position in meters in device space
+		HmdVector3_t vNormal;
+		float rfTextureCoord[2];
+	};
+
+/** A texture map for use on a render model */
+#if defined(__linux__) || defined(__APPLE__)
+// This structure was originally defined mis-packed on Linux, preserved for
+// compatibility.
+#pragma pack(push, 4)
+#endif
+
+	struct RenderModel_TextureMap_t
+	{
+		uint16_t unWidth, unHeight;			// width and height of the texture map in pixels
+		const uint8_t *rubTextureMapData;	// Map texture data.
+		EVRRenderModelTextureFormat format; // Refer to EVRRenderModelTextureFormat
+		uint16_t unMipLevels;
+	};
+#if defined(__linux__) || defined(__APPLE__)
+#pragma pack(pop)
+#endif
+
+	/**  Session unique texture identifier. Rendermodels which share the same texture will have the same id.
+	IDs <0 denote the texture is not present */
+
+	typedef int32_t TextureID_t;
+
+	const TextureID_t INVALID_TEXTURE_ID = -1;
+
+#if defined(__linux__) || defined(__APPLE__)
+// This structure was originally defined mis-packed on Linux, preserved for
+// compatibility.
+#pragma pack(push, 4)
+#endif
+
+	struct RenderModel_t
+	{
+		const RenderModel_Vertex_t *rVertexData; // Vertex data for the mesh
+		uint32_t unVertexCount;					 // Number of vertices in the vertex data
+		const uint16_t *rIndexData;				 // Indices into the vertex data for each triangle
+		uint32_t unTriangleCount;				 // Number of triangles in the mesh. Index count is 3 * TriangleCount
+		TextureID_t diffuseTextureId;			 // Session unique texture identifier. Rendermodels which share the same texture will have the same id. <0 == texture not present
+	};
+#if defined(__linux__) || defined(__APPLE__)
+#pragma pack(pop)
+#endif
+
+	struct RenderModel_ControllerMode_State_t
+	{
+		bool bScrollWheelVisible; // is this controller currently set to be in a scroll wheel mode
+	};
+
+#pragma pack(pop)
+
+	class IVRRenderModels
+	{
+	public:
+		/** Loads and returns a render model for use in the application. pchRenderModelName should be a render model name
+		 * from the Prop_RenderModelName_String property or an absolute path name to a render model on disk.
+		 *
+		 * The resulting render model is valid until VR_Shutdown() is called or until FreeRenderModel() is called. When the
+		 * application is finished with the render model it should call FreeRenderModel() to free the memory associated
+		 * with the model.
+		 *
+		 * The method returns VRRenderModelError_Loading while the render model is still being loaded.
+		 * The method returns VRRenderModelError_None once loaded successfully, otherwise will return an error. */
+		virtual EVRRenderModelError LoadRenderModel_Async(const char *pchRenderModelName, RenderModel_t **ppRenderModel) = 0;
+
+		/** Frees a previously returned render model
+		 *   It is safe to call this on a null ptr. */
+		virtual void FreeRenderModel(RenderModel_t *pRenderModel) = 0;
+
+		/** Loads and returns a texture for use in the application. */
+		virtual EVRRenderModelError LoadTexture_Async(TextureID_t textureId, RenderModel_TextureMap_t **ppTexture) = 0;
+
+		/** Frees a previously returned texture
+		 *   It is safe to call this on a null ptr. */
+		virtual void FreeTexture(RenderModel_TextureMap_t *pTexture) = 0;
+
+		/** Creates a D3D11 texture and loads data into it. */
+		virtual EVRRenderModelError LoadTextureD3D11_Async(TextureID_t textureId, void *pD3D11Device, void **ppD3D11Texture2D) = 0;
+
+		/** Helper function to copy the bits into an existing texture. */
+		virtual EVRRenderModelError LoadIntoTextureD3D11_Async(TextureID_t textureId, void *pDstTexture) = 0;
+
+		/** Use this to free textures created with LoadTextureD3D11_Async instead of calling Release on them. */
+		virtual void FreeTextureD3D11(void *pD3D11Texture2D) = 0;
+
+		/** Use this to get the names of available render models.  Index does not correlate to a tracked device index, but
+		 * is only used for iterating over all available render models.  If the index is out of range, this function will return 0.
+		 * Otherwise, it will return the size of the buffer required for the name. */
+		virtual uint32_t GetRenderModelName(uint32_t unRenderModelIndex, VR_OUT_STRING() char *pchRenderModelName, uint32_t unRenderModelNameLen) = 0;
+
+		/** Returns the number of available render models. */
+		virtual uint32_t GetRenderModelCount() = 0;
+
+		/** Returns the number of components of the specified render model.
+		 *  Components are useful when client application wish to draw, label, or otherwise interact with components of tracked objects.
+		 *  Examples controller components:
+		 *   renderable things such as triggers, buttons
+		 *   non-renderable things which include coordinate systems such as 'tip', 'base', a neutral controller agnostic hand-pose
+		 *   If all controller components are enumerated and rendered, it will be equivalent to drawing the traditional render model
+		 *   Returns 0 if components not supported, >0 otherwise */
+		virtual uint32_t GetComponentCount(const char *pchRenderModelName) = 0;
+
+		/** Use this to get the names of available components.  Index does not correlate to a tracked device index, but
+		 * is only used for iterating over all available components.  If the index is out of range, this function will return 0.
+		 * Otherwise, it will return the size of the buffer required for the name. */
+		virtual uint32_t GetComponentName(const char *pchRenderModelName, uint32_t unComponentIndex, VR_OUT_STRING() char *pchComponentName, uint32_t unComponentNameLen) = 0;
+
+		/** Get the button mask for all buttons associated with this component
+		 *   If no buttons (or axes) are associated with this component, return 0
+		 *   Note: multiple components may be associated with the same button. Ex: two grip buttons on a single controller.
+		 *   Note: A single component may be associated with multiple buttons. Ex: A trackpad which also provides "D-pad" functionality */
+		virtual uint64_t GetComponentButtonMask(const char *pchRenderModelName, const char *pchComponentName) = 0;
+
+		/** Use this to get the render model name for the specified rendermode/component combination, to be passed to LoadRenderModel.
+		 * If the component name is out of range, this function will return 0.
+		 * Otherwise, it will return the size of the buffer required for the name. */
+		virtual uint32_t GetComponentRenderModelName(const char *pchRenderModelName, const char *pchComponentName, VR_OUT_STRING() char *pchComponentRenderModelName, uint32_t unComponentRenderModelNameLen) = 0;
+
+		/** Use this to query information about the component, as a function of the controller state.
+		 *
+		 * For dynamic controller components (ex: trigger) values will reflect component motions
+		 * For static components this will return a consistent value independent of the VRControllerState_t
+		 *
+		 * If the pchRenderModelName or pchComponentName is invalid, this will return false (and transforms will be set to identity).
+		 * Otherwise, return true
+		 * Note: For dynamic objects, visibility may be dynamic. (I.e., true/false will be returned based on controller state and controller mode state ) */
+		virtual bool GetComponentStateForDevicePath(const char *pchRenderModelName, const char *pchComponentName, vr::VRInputValueHandle_t devicePath, const vr::RenderModel_ControllerMode_State_t *pState, vr::RenderModel_ComponentState_t *pComponentState) = 0;
+
+		/** This version of GetComponentState takes a controller state block instead of an action origin. This function is deprecated. You should use the new input system and GetComponentStateForDevicePath instead. */
+		virtual bool GetComponentState(const char *pchRenderModelName, const char *pchComponentName, const vr::VRControllerState_t *pControllerState, const RenderModel_ControllerMode_State_t *pState, RenderModel_ComponentState_t *pComponentState) = 0;
+
+		/** Returns true if the render model has a component with the specified name */
+		virtual bool RenderModelHasComponent(const char *pchRenderModelName, const char *pchComponentName) = 0;
+
+		/** Returns the URL of the thumbnail image for this rendermodel */
+		virtual uint32_t GetRenderModelThumbnailURL(const char *pchRenderModelName, VR_OUT_STRING() char *pchThumbnailURL, uint32_t unThumbnailURLLen, vr::EVRRenderModelError *peError) = 0;
+
+		/** Provides a render model path that will load the unskinned model if the model name provided has been replace by the user. If the model
+		 * hasn't been replaced the path value will still be a valid path to load the model. Pass this to LoadRenderModel_Async, etc. to load the
+		 * model. */
+		virtual uint32_t GetRenderModelOriginalPath(const char *pchRenderModelName, VR_OUT_STRING() char *pchOriginalPath, uint32_t unOriginalPathLen, vr::EVRRenderModelError *peError) = 0;
+
+		/** Returns a string for a render model error */
+		virtual const char *GetRenderModelErrorNameFromEnum(vr::EVRRenderModelError error) = 0;
+	};
+
+	static const char *const IVRRenderModels_Version = "IVRRenderModels_006";
+
+}
+
+// ivrextendeddisplay.h
+
+namespace vr
+{
+
+	/** NOTE: Use of this interface is not recommended in production applications. It will not work for displays which use
+	 * direct-to-display mode. Creating our own window is also incompatible with the VR compositor and is not available when the compositor is running. */
+	class IVRExtendedDisplay
+	{
+	public:
+		/** Size and position that the window needs to be on the VR display. */
+		virtual void GetWindowBounds(int32_t *pnX, int32_t *pnY, uint32_t *pnWidth, uint32_t *pnHeight) = 0;
+
+		/** Gets the viewport in the frame buffer to draw the output of the distortion into */
+		virtual void GetEyeOutputViewport(EVREye eEye, uint32_t *pnX, uint32_t *pnY, uint32_t *pnWidth, uint32_t *pnHeight) = 0;
+
+		/** [D3D10/11 Only]
+		 * Returns the adapter index and output index that the user should pass into EnumAdapters and EnumOutputs
+		 * to create the device and swap chain in DX10 and DX11. If an error occurs both indices will be set to -1.
+		 */
+		virtual void GetDXGIOutputInfo(int32_t *pnAdapterIndex, int32_t *pnAdapterOutputIndex) = 0;
+	};
+
+	static const char *const IVRExtendedDisplay_Version = "IVRExtendedDisplay_001";
+
+}
+
+// ivrtrackedcamera.h
+
+namespace vr
+{
+
+	class IVRTrackedCamera
+	{
+	public:
+		/** Returns a string for an error */
+		virtual const char *GetCameraErrorNameFromEnum(vr::EVRTrackedCameraError eCameraError) = 0;
+
+		/** For convenience, same as tracked property request Prop_HasCamera_Bool */
+		virtual vr::EVRTrackedCameraError HasCamera(vr::TrackedDeviceIndex_t nDeviceIndex, bool *pHasCamera) = 0;
+
+		/** Gets size of the image frame. */
+		virtual vr::EVRTrackedCameraError GetCameraFrameSize(vr::TrackedDeviceIndex_t nDeviceIndex, vr::EVRTrackedCameraFrameType eFrameType, uint32_t *pnWidth, uint32_t *pnHeight, uint32_t *pnFrameBufferSize) = 0;
+
+		virtual vr::EVRTrackedCameraError GetCameraIntrinsics(vr::TrackedDeviceIndex_t nDeviceIndex, uint32_t nCameraIndex, vr::EVRTrackedCameraFrameType eFrameType, vr::HmdVector2_t *pFocalLength, vr::HmdVector2_t *pCenter) = 0;
+
+		virtual vr::EVRTrackedCameraError GetCameraProjection(vr::TrackedDeviceIndex_t nDeviceIndex, uint32_t nCameraIndex, vr::EVRTrackedCameraFrameType eFrameType, float flZNear, float flZFar, vr::HmdMatrix44_t *pProjection) = 0;
+
+		/** Acquiring streaming service permits video streaming for the caller. Releasing hints the system that video services do not need to be maintained for this client.
+		 * If the camera has not already been activated, a one time spin up may incur some auto exposure as well as initial streaming frame delays.
+		 * The camera should be considered a global resource accessible for shared consumption but not exclusive to any caller.
+		 * The camera may go inactive due to lack of active consumers or headset idleness. */
+		virtual vr::EVRTrackedCameraError AcquireVideoStreamingService(vr::TrackedDeviceIndex_t nDeviceIndex, vr::TrackedCameraHandle_t *pHandle) = 0;
+		virtual vr::EVRTrackedCameraError ReleaseVideoStreamingService(vr::TrackedCameraHandle_t hTrackedCamera) = 0;
+
+		/** Copies the image frame into a caller's provided buffer. The image data is currently provided as RGBA data, 4 bytes per pixel.
+		 * A caller can provide null for the framebuffer or frameheader if not desired. Requesting the frame header first, followed by the frame buffer allows
+		 * the caller to determine if the frame as advanced per the frame header sequence.
+		 * If there is no frame available yet, due to initial camera spinup or re-activation, the error will be VRTrackedCameraError_NoFrameAvailable.
+		 * Ideally a caller should be polling at ~16ms intervals */
+		virtual vr::EVRTrackedCameraError GetVideoStreamFrameBuffer(vr::TrackedCameraHandle_t hTrackedCamera, vr::EVRTrackedCameraFrameType eFrameType, void *pFrameBuffer, uint32_t nFrameBufferSize, vr::CameraVideoStreamFrameHeader_t *pFrameHeader, uint32_t nFrameHeaderSize) = 0;
+
+		/** Gets size of the image frame. */
+		virtual vr::EVRTrackedCameraError GetVideoStreamTextureSize(vr::TrackedDeviceIndex_t nDeviceIndex, vr::EVRTrackedCameraFrameType eFrameType, vr::VRTextureBounds_t *pTextureBounds, uint32_t *pnWidth, uint32_t *pnHeight) = 0;
+
+		/** Access a shared D3D11 texture for the specified tracked camera stream.
+		 * The camera frame type VRTrackedCameraFrameType_Undistorted is not supported directly as a shared texture. It is an interior subregion of the shared texture VRTrackedCameraFrameType_MaximumUndistorted.
+		 * Instead, use GetVideoStreamTextureSize() with VRTrackedCameraFrameType_Undistorted to determine the proper interior subregion bounds along with GetVideoStreamTextureD3D11() with
+		 * VRTrackedCameraFrameType_MaximumUndistorted to provide the texture. The VRTrackedCameraFrameType_MaximumUndistorted will yield an image where the invalid regions are decoded
+		 * by the alpha channel having a zero component. The valid regions all have a non-zero alpha component. The subregion as described by VRTrackedCameraFrameType_Undistorted
+		 * guarantees a rectangle where all pixels are valid. */
+		virtual vr::EVRTrackedCameraError GetVideoStreamTextureD3D11(vr::TrackedCameraHandle_t hTrackedCamera, vr::EVRTrackedCameraFrameType eFrameType, void *pD3D11DeviceOrResource, void **ppD3D11ShaderResourceView, vr::CameraVideoStreamFrameHeader_t *pFrameHeader, uint32_t nFrameHeaderSize) = 0;
+
+		/** Access a shared GL texture for the specified tracked camera stream */
+		virtual vr::EVRTrackedCameraError GetVideoStreamTextureGL(vr::TrackedCameraHandle_t hTrackedCamera, vr::EVRTrackedCameraFrameType eFrameType, vr::glUInt_t *pglTextureId, vr::CameraVideoStreamFrameHeader_t *pFrameHeader, uint32_t nFrameHeaderSize) = 0;
+		virtual vr::EVRTrackedCameraError ReleaseVideoStreamTextureGL(vr::TrackedCameraHandle_t hTrackedCamera, vr::glUInt_t glTextureId) = 0;
+		virtual void SetCameraTrackingSpace(vr::ETrackingUniverseOrigin eUniverse) = 0;
+		virtual vr::ETrackingUniverseOrigin GetCameraTrackingSpace() = 0;
+	};
+
+	static const char *const IVRTrackedCamera_Version = "IVRTrackedCamera_006";
+
+} // namespace vr
+
+// ivrscreenshots.h
+
+namespace vr
+{
+
+	/** Errors that can occur with the VR compositor */
+	enum EVRScreenshotError
+	{
+		VRScreenshotError_None = 0,
+		VRScreenshotError_RequestFailed = 1,
+		VRScreenshotError_IncompatibleVersion = 100,
+		VRScreenshotError_NotFound = 101,
+		VRScreenshotError_BufferTooSmall = 102,
+		VRScreenshotError_ScreenshotAlreadyInProgress = 108,
+	};
+
+	/** Allows the application to generate screenshots */
+	class IVRScreenshots
+	{
+	public:
+		/** Request a screenshot of the requested type.
+		 *  A request of the VRScreenshotType_Stereo type will always
+		 *  work. Other types will depend on the underlying application
+		 *  support.
+		 *  The first file name is for the preview image and should be a
+		 *  regular screenshot (ideally from the left eye). The second
+		 *  is the VR screenshot in the correct format. They should be
+		 *  in the same aspect ratio.  Formats per type:
+		 *  VRScreenshotType_Mono: the VR filename is ignored (can be
+		 *  nullptr), this is a normal flat single shot.
+		 *  VRScreenshotType_Stereo:  The VR image should be a
+		 *  side-by-side with the left eye image on the left.
+		 *  VRScreenshotType_Cubemap: The VR image should be six square
+		 *  images composited horizontally.
+		 *  VRScreenshotType_StereoPanorama: above/below with left eye
+		 *  panorama being the above image.  Image is typically square
+		 *  with the panorama being 2x horizontal.
+		 *
+		 *  Note that the VR dashboard will call this function when
+		 *  the user presses the screenshot binding (currently System
+		 *  Button + Trigger).  If Steam is running, the destination
+		 *  file names will be in %TEMP% and will be copied into
+		 *  Steam's screenshot library for the running application
+		 *  once SubmitScreenshot() is called.
+		 *  If Steam is not running, the paths will be in the user's
+		 *  documents folder under Documents\SteamVR\Screenshots.
+		 *  Other VR applications can call this to initiate a
+		 *  screenshot outside of user control.
+		 *  The destination file names do not need an extension,
+		 *  will be replaced with the correct one for the format
+		 *  which is currently .png. */
+		virtual vr::EVRScreenshotError RequestScreenshot(vr::ScreenshotHandle_t *pOutScreenshotHandle, vr::EVRScreenshotType type, const char *pchPreviewFilename, const char *pchVRFilename) = 0;
+
+		/** Called by the running VR application to indicate that it
+		 *  wishes to be in charge of screenshots.  If the
+		 *  application does not call this, the Compositor will only
+		 *  support VRScreenshotType_Stereo screenshots that will be
+		 *  captured without notification to the running app.
+		 *  Once hooked your application will receive a
+		 *  VREvent_RequestScreenshot event when the user presses the
+		 *  buttons to take a screenshot. */
+		virtual vr::EVRScreenshotError HookScreenshot(VR_ARRAY_COUNT(numTypes) const vr::EVRScreenshotType *pSupportedTypes, int numTypes) = 0;
+
+		/** When your application receives a
+		 *  VREvent_RequestScreenshot event, call these functions to get
+		 *  the details of the screenshot request. */
+		virtual vr::EVRScreenshotType GetScreenshotPropertyType(vr::ScreenshotHandle_t screenshotHandle, vr::EVRScreenshotError *pError) = 0;
+
+		/** Get the filename for the preview or vr image (see
+		 *  vr::EScreenshotPropertyFilenames).  The return value is
+		 *  the size of the string.   */
+		virtual uint32_t GetScreenshotPropertyFilename(vr::ScreenshotHandle_t screenshotHandle, vr::EVRScreenshotPropertyFilenames filenameType, VR_OUT_STRING() char *pchFilename, uint32_t cchFilename, vr::EVRScreenshotError *pError) = 0;
+
+		/** Call this if the application is taking the screen shot
+		 *  will take more than a few ms processing. This will result
+		 *  in an overlay being presented that shows a completion
+		 *  bar. */
+		virtual vr::EVRScreenshotError UpdateScreenshotProgress(vr::ScreenshotHandle_t screenshotHandle, float flProgress) = 0;
+
+		/** Tells the compositor to take an internal screenshot of
+		 *  type VRScreenshotType_Stereo. It will take the current
+		 *  submitted scene textures of the running application and
+		 *  write them into the preview image and a side-by-side file
+		 *  for the VR image.
+		 *  This is similar to request screenshot, but doesn't ever
+		 *  talk to the application, just takes the shot and submits. */
+		virtual vr::EVRScreenshotError TakeStereoScreenshot(vr::ScreenshotHandle_t *pOutScreenshotHandle, const char *pchPreviewFilename, const char *pchVRFilename) = 0;
+
+		/** Submit the completed screenshot.  If Steam is running
+		 *  this will call into the Steam client and upload the
+		 *  screenshot to the screenshots section of the library for
+		 *  the running application.  If Steam is not running, this
+		 *  function will display a notification to the user that the
+		 *  screenshot was taken. The paths should be full paths with
+		 *  extensions.
+		 *  File paths should be absolute including extensions.
+		 *  screenshotHandle can be k_unScreenshotHandleInvalid if this
+		 *  was a new shot taking by the app to be saved and not
+		 *  initiated by a user (achievement earned or something) */
+		virtual vr::EVRScreenshotError SubmitScreenshot(vr::ScreenshotHandle_t screenshotHandle, vr::EVRScreenshotType type, const char *pchSourcePreviewFilename, const char *pchSourceVRFilename) = 0;
+	};
+
+	static const char *const IVRScreenshots_Version = "IVRScreenshots_001";
+
+} // namespace vr
+
+// ivrresources.h
+
+namespace vr
+{
+
+	class IVRResources
+	{
+	public:
+		// ------------------------------------
+		// Shared Resource Methods
+		// ------------------------------------
+
+		/** Loads the specified resource into the provided buffer if large enough.
+		 * Returns the size in bytes of the buffer required to hold the specified resource. */
+		virtual uint32_t LoadSharedResource(const char *pchResourceName, char *pchBuffer, uint32_t unBufferLen) = 0;
+
+		/** Provides the full path to the specified resource. Resource names can include named directories for
+		 * drivers and other things, and this resolves all of those and returns the actual physical path.
+		 * pchResourceTypeDirectory is the subdirectory of resources to look in. */
+		virtual uint32_t GetResourceFullPath(const char *pchResourceName, const char *pchResourceTypeDirectory, VR_OUT_STRING() char *pchPathBuffer, uint32_t unBufferLen) = 0;
+	};
+
+	static const char *const IVRResources_Version = "IVRResources_001";
+
+}
+
+// ivrdrivermanager.h
+
+namespace vr
+{
+
+	class IVRDriverManager
+	{
+	public:
+		virtual uint32_t GetDriverCount() const = 0;
+
+		/** Returns the length of the number of bytes necessary to hold this string including the trailing null. */
+		virtual uint32_t GetDriverName(vr::DriverId_t nDriver, VR_OUT_STRING() char *pchValue, uint32_t unBufferSize) = 0;
+
+		virtual DriverHandle_t GetDriverHandle(const char *pchDriverName) = 0;
+
+		virtual bool IsEnabled(vr::DriverId_t nDriver) const = 0;
+	};
+
+	static const char *const IVRDriverManager_Version = "IVRDriverManager_001";
+
+} // namespace vr
+
+// ivrinput.h
+
+namespace vr
+{
+	// Maximum number of characters in an action name, including the trailing null
+	static const uint32_t k_unMaxActionNameLength = 64;
+
+	// Maximum number of characters in an action set name, including the trailing null
+	static const uint32_t k_unMaxActionSetNameLength = 64;
+
+	// Maximum number of origins for an action
+	static const uint32_t k_unMaxActionOriginCount = 16;
+
+	// Maximum number of characters in a bone name, including the trailing null
+	static const uint32_t k_unMaxBoneNameLength = 32;
+
+	enum EVRSkeletalTransformSpace
+	{
+		VRSkeletalTransformSpace_Model = 0,
+		VRSkeletalTransformSpace_Parent = 1
+	};
+
+	enum EVRSkeletalReferencePose
+	{
+		VRSkeletalReferencePose_BindPose = 0,
+		VRSkeletalReferencePose_OpenHand,
+		VRSkeletalReferencePose_Fist,
+		VRSkeletalReferencePose_GripLimit
+	};
+
+	enum EVRFinger
+	{
+		VRFinger_Thumb = 0,
+		VRFinger_Index,
+		VRFinger_Middle,
+		VRFinger_Ring,
+		VRFinger_Pinky,
+		VRFinger_Count
+	};
+
+	enum EVRFingerSplay
+	{
+		VRFingerSplay_Thumb_Index = 0,
+		VRFingerSplay_Index_Middle,
+		VRFingerSplay_Middle_Ring,
+		VRFingerSplay_Ring_Pinky,
+		VRFingerSplay_Count
+	};
+
+	enum EVRSummaryType
+	{
+		// The skeletal summary data will match the animated bone transforms for the action.
+		VRSummaryType_FromAnimation = 0,
+
+		// The skeletal summary data will include unprocessed data directly from the device when available.
+		// This data is generally less latent than the data that is computed from the animations.
+		VRSummaryType_FromDevice = 1,
+	};
+
+	enum EVRInputFilterCancelType
+	{
+		VRInputFilterCancel_Timers = 0,
+		VRInputFilterCancel_Momentum = 1,
+	};
+
+	enum EVRInputStringBits
+	{
+		VRInputString_Hand = 0x01,
+		VRInputString_ControllerType = 0x02,
+		VRInputString_InputSource = 0x04,
+
+		VRInputString_All = 0xFFFFFFFF
+	};
+
+	struct InputAnalogActionData_t
+	{
+		/** Whether or not this action is currently available to be bound in the active action set */
+		bool bActive;
+
+		/** The origin that caused this action's current state */
+		VRInputValueHandle_t activeOrigin;
+
+		/** The current state of this action; will be delta updates for mouse actions */
+		float x, y, z;
+
+		/** Deltas since the previous call to UpdateActionState() */
+		float deltaX, deltaY, deltaZ;
+
+		/** Time relative to now when this event happened. Will be negative to indicate a past time. */
+		float fUpdateTime;
+	};
+
+	struct InputDigitalActionData_t
+	{
+		/** Whether or not this action is currently available to be bound in the active action set */
+		bool bActive;
+
+		/** The origin that caused this action's current state */
+		VRInputValueHandle_t activeOrigin;
+
+		/** The current state of this action; will be true if currently pressed */
+		bool bState;
+
+		/** This is true if the state has changed since the last frame */
+		bool bChanged;
+
+		/** Time relative to now when this event happened. Will be negative to indicate a past time. */
+		float fUpdateTime;
+	};
+
+	struct InputPoseActionData_t
+	{
+		/** Whether or not this action is currently available to be bound in the active action set */
+		bool bActive;
+
+		/** The origin that caused this action's current state */
+		VRInputValueHandle_t activeOrigin;
+
+		/** The current state of this action */
+		TrackedDevicePose_t pose;
+	};
+
+	struct InputSkeletalActionData_t
+	{
+		/** Whether or not this action is currently available to be bound in the active action set */
+		bool bActive;
+
+		/** The origin that caused this action's current state */
+		VRInputValueHandle_t activeOrigin;
+	};
+
+	struct InputOriginInfo_t
+	{
+		VRInputValueHandle_t devicePath;
+		TrackedDeviceIndex_t trackedDeviceIndex;
+		char rchRenderModelComponentName[128];
+	};
+
+	struct InputBindingInfo_t
+	{
+		char rchDevicePathName[128];
+		char rchInputPathName[128];
+		char rchModeName[128];
+		char rchSlotName[128];
+		char rchInputSourceType[32];
+	};
+
+	// * Experimental global action set priority *
+	// These constants are part of the experimental support in SteamVR for overlay
+	// apps selectively overriding input in the base scene application. This may be
+	// useful for overlay applications that need to use part or all of a controller
+	// without taking away all input to the game. This system must be enabled by the
+	// "Experimental overlay input overrides" setting in the developer section of
+	// SteamVR settings.
+	//
+	// To use this system, set the nPriority field of an action set to any number in
+	// this range.
+	static const int32_t k_nActionSetOverlayGlobalPriorityMin = 0x01000000;
+	static const int32_t k_nActionSetOverlayGlobalPriorityMax = 0x01FFFFFF;
+
+	static const int32_t k_nActionSetPriorityReservedMin = 0x02000000;
+
+	struct VRActiveActionSet_t
+	{
+		/** This is the handle of the action set to activate for this frame. */
+		VRActionSetHandle_t ulActionSet;
+
+		/** This is the handle of a device path that this action set should be active for. To
+		 * activate for all devices, set this to k_ulInvalidInputValueHandle. */
+		VRInputValueHandle_t ulRestrictedToDevice;
+
+		/** The action set to activate for all devices other than ulRestrictedDevice. If
+		 * ulRestrictedToDevice is set to k_ulInvalidInputValueHandle, this parameter is
+		 * ignored. */
+		VRActionSetHandle_t ulSecondaryActionSet;
+
+		// This field is ignored
+		uint32_t unPadding;
+
+		/** The priority of this action set relative to other action sets. Any inputs
+		 * bound to a source (e.g. trackpad, joystick, trigger) will disable bindings in
+		 * other active action sets with a smaller priority.
+		 *
+		 * Overlay applications (i.e. ApplicationType_Overlay) may set their action set priority
+		 * to a value between k_nActionSetOverlayGlobalPriorityMin and k_nActionSetOverlayGlobalPriorityMax
+		 * to cause any inputs bound to a source used by that action set to be disabled in scene applications.
+		 *
+		 * No action set priority may value may be larger than k_nActionSetPriorityReservedMin
+		 */
+		int32_t nPriority;
+	};
+
+	/** Contains summary information about the current skeletal pose */
+	struct VRSkeletalSummaryData_t
+	{
+		/** The amount that each finger is 'curled' inwards towards the palm.  In the case of the thumb,
+		 * this represents how much the thumb is wrapped around the fist.
+		 * 0 means straight, 1 means fully curled */
+		float flFingerCurl[VRFinger_Count];
+
+		/** The amount that each pair of adjacent fingers are separated.
+		 * 0 means the digits are touching, 1 means they are fully separated.
+		 */
+		float flFingerSplay[VRFingerSplay_Count];
+	};
+
+	class IVRInput
+	{
+	public:
+		// ---------------  Handle management   --------------- //
+
+		/** Sets the path to the action manifest JSON file that is used by this application. If this information
+		 * was set on the Steam partner site, calls to this function are ignored. If the Steam partner site
+		 * setting and the path provided by this call are different, VRInputError_MismatchedActionManifest is returned.
+		 * This call must be made before the first call to UpdateActionState or IVRSystem::PollNextEvent. */
+		virtual EVRInputError SetActionManifestPath(const char *pchActionManifestPath) = 0;
+
+		/** Returns a handle for an action set. This handle is used for all performance-sensitive calls. */
+		virtual EVRInputError GetActionSetHandle(const char *pchActionSetName, VRActionSetHandle_t *pHandle) = 0;
+
+		/** Returns a handle for an action. This handle is used for all performance-sensitive calls. */
+		virtual EVRInputError GetActionHandle(const char *pchActionName, VRActionHandle_t *pHandle) = 0;
+
+		/** Returns a handle for any path in the input system. E.g. /user/hand/right */
+		virtual EVRInputError GetInputSourceHandle(const char *pchInputSourcePath, VRInputValueHandle_t *pHandle) = 0;
+
+		// --------------- Reading action state ------------------- //
+
+		/** Reads the current state into all actions. After this call, the results of Get*Action calls
+		 * will be the same until the next call to UpdateActionState. */
+		virtual EVRInputError UpdateActionState(VR_ARRAY_COUNT(unSetCount) VRActiveActionSet_t *pSets, uint32_t unSizeOfVRSelectedActionSet_t, uint32_t unSetCount) = 0;
+
+		/** Reads the state of a digital action given its handle. This will return VRInputError_WrongType if the type of
+		 * action is something other than digital */
+		virtual EVRInputError GetDigitalActionData(VRActionHandle_t action, InputDigitalActionData_t *pActionData, uint32_t unActionDataSize, VRInputValueHandle_t ulRestrictToDevice) = 0;
+
+		/** Reads the state of an analog action given its handle. This will return VRInputError_WrongType if the type of
+		 * action is something other than analog */
+		virtual EVRInputError GetAnalogActionData(VRActionHandle_t action, InputAnalogActionData_t *pActionData, uint32_t unActionDataSize, VRInputValueHandle_t ulRestrictToDevice) = 0;
+
+		/** Reads the state of a pose action given its handle for the number of seconds relative to now. This
+		 * will generally be called with negative times from the fUpdateTime fields in other actions. */
+		virtual EVRInputError GetPoseActionDataRelativeToNow(VRActionHandle_t action, ETrackingUniverseOrigin eOrigin, float fPredictedSecondsFromNow, InputPoseActionData_t *pActionData, uint32_t unActionDataSize, VRInputValueHandle_t ulRestrictToDevice) = 0;
+
+		/** Reads the state of a pose action given its handle. The returned values will match the values returned
+		 * by the last call to IVRCompositor::WaitGetPoses(). */
+		virtual EVRInputError GetPoseActionDataForNextFrame(VRActionHandle_t action, ETrackingUniverseOrigin eOrigin, InputPoseActionData_t *pActionData, uint32_t unActionDataSize, VRInputValueHandle_t ulRestrictToDevice) = 0;
+
+		/** Reads the state of a skeletal action given its handle. */
+		virtual EVRInputError GetSkeletalActionData(VRActionHandle_t action, InputSkeletalActionData_t *pActionData, uint32_t unActionDataSize) = 0;
+
+		/** Returns the current dominant hand for the user for this application. This function will only return success for applications
+		 * which include "supports_dominant_hand_setting": true in their action manifests. The dominant hand will only change after
+		 * a call to UpdateActionState, and the action data returned after that point will use the new dominant hand. */
+		virtual EVRInputError GetDominantHand(ETrackedControllerRole *peDominantHand) = 0;
+
+		/** Sets the dominant hand for the user for this application. */
+		virtual EVRInputError SetDominantHand(ETrackedControllerRole eDominantHand) = 0;
+
+		// ---------------  Static Skeletal Data ------------------- //
+
+		/** Reads the number of bones in skeleton associated with the given action */
+		virtual EVRInputError GetBoneCount(VRActionHandle_t action, uint32_t *pBoneCount) = 0;
+
+		/** Fills the given array with the index of each bone's parent in the skeleton associated with the given action */
+		virtual EVRInputError GetBoneHierarchy(VRActionHandle_t action, VR_ARRAY_COUNT(unIndexArayCount) BoneIndex_t *pParentIndices, uint32_t unIndexArayCount) = 0;
+
+		/** Fills the given buffer with the name of the bone at the given index in the skeleton associated with the given action */
+		virtual EVRInputError GetBoneName(VRActionHandle_t action, BoneIndex_t nBoneIndex, VR_OUT_STRING() char *pchBoneName, uint32_t unNameBufferSize) = 0;
+
+		/** Fills the given buffer with the transforms for a specific static skeletal reference pose */
+		virtual EVRInputError GetSkeletalReferenceTransforms(VRActionHandle_t action, EVRSkeletalTransformSpace eTransformSpace, EVRSkeletalReferencePose eReferencePose, VR_ARRAY_COUNT(unTransformArrayCount) VRBoneTransform_t *pTransformArray, uint32_t unTransformArrayCount) = 0;
+
+		/** Reads the level of accuracy to which the controller is able to track the user to recreate a skeletal pose */
+		virtual EVRInputError GetSkeletalTrackingLevel(VRActionHandle_t action, EVRSkeletalTrackingLevel *pSkeletalTrackingLevel) = 0;
+
+		// ---------------  Dynamic Skeletal Data ------------------- //
+
+		/** Reads the state of the skeletal bone data associated with this action and copies it into the given buffer. */
+		virtual EVRInputError GetSkeletalBoneData(VRActionHandle_t action, EVRSkeletalTransformSpace eTransformSpace, EVRSkeletalMotionRange eMotionRange, VR_ARRAY_COUNT(unTransformArrayCount) VRBoneTransform_t *pTransformArray, uint32_t unTransformArrayCount) = 0;
+
+		/** Reads summary information about the current pose of the skeleton associated with the given action.   */
+		virtual EVRInputError GetSkeletalSummaryData(VRActionHandle_t action, EVRSummaryType eSummaryType, VRSkeletalSummaryData_t *pSkeletalSummaryData) = 0;
+
+		/** Reads the state of the skeletal bone data in a compressed form that is suitable for
+		 * sending over the network. The required buffer size will never exceed ( sizeof(VR_BoneTransform_t)*boneCount + 2).
+		 * Usually the size will be much smaller. */
+		virtual EVRInputError GetSkeletalBoneDataCompressed(VRActionHandle_t action, EVRSkeletalMotionRange eMotionRange, VR_OUT_BUFFER_COUNT(unCompressedSize) void *pvCompressedData, uint32_t unCompressedSize, uint32_t *punRequiredCompressedSize) = 0;
+
+		/** Turns a compressed buffer from GetSkeletalBoneDataCompressed and turns it back into a bone transform array. */
+		virtual EVRInputError DecompressSkeletalBoneData(const void *pvCompressedBuffer, uint32_t unCompressedBufferSize, EVRSkeletalTransformSpace eTransformSpace, VR_ARRAY_COUNT(unTransformArrayCount) VRBoneTransform_t *pTransformArray, uint32_t unTransformArrayCount) = 0;
+
+		// --------------- Haptics ------------------- //
+
+		/** Triggers a haptic event as described by the specified action */
+		virtual EVRInputError TriggerHapticVibrationAction(VRActionHandle_t action, float fStartSecondsFromNow, float fDurationSeconds, float fFrequency, float fAmplitude, VRInputValueHandle_t ulRestrictToDevice) = 0;
+
+		// --------------- Action Origins ---------------- //
+
+		/** Retrieve origin handles for an action */
+		virtual EVRInputError GetActionOrigins(VRActionSetHandle_t actionSetHandle, VRActionHandle_t digitalActionHandle, VR_ARRAY_COUNT(originOutCount) VRInputValueHandle_t *originsOut, uint32_t originOutCount) = 0;
+
+		/** Retrieves the name of the origin in the current language. unStringSectionsToInclude is a bitfield of values in EVRInputStringBits that allows the
+			application to specify which parts of the origin's information it wants a string for. */
+		virtual EVRInputError GetOriginLocalizedName(VRInputValueHandle_t origin, VR_OUT_STRING() char *pchNameArray, uint32_t unNameArraySize, int32_t unStringSectionsToInclude) = 0;
+
+		/** Retrieves useful information for the origin of this action */
+		virtual EVRInputError GetOriginTrackedDeviceInfo(VRInputValueHandle_t origin, InputOriginInfo_t *pOriginInfo, uint32_t unOriginInfoSize) = 0;
+
+		/** Retrieves useful information about the bindings for an action */
+		virtual EVRInputError GetActionBindingInfo(VRActionHandle_t action, InputBindingInfo_t *pOriginInfo, uint32_t unBindingInfoSize, uint32_t unBindingInfoCount, uint32_t *punReturnedBindingInfoCount) = 0;
+
+		/** Shows the current binding for the action in-headset */
+		virtual EVRInputError ShowActionOrigins(VRActionSetHandle_t actionSetHandle, VRActionHandle_t ulActionHandle) = 0;
+
+		/** Shows the current binding all the actions in the specified action sets */
+		virtual EVRInputError ShowBindingsForActionSet(VR_ARRAY_COUNT(unSetCount) VRActiveActionSet_t *pSets, uint32_t unSizeOfVRSelectedActionSet_t, uint32_t unSetCount, VRInputValueHandle_t originToHighlight) = 0;
+
+		/** Use this to query what action on the component returned by GetOriginTrackedDeviceInfo would trigger this binding. */
+		virtual EVRInputError GetComponentStateForBinding(const char *pchRenderModelName, const char *pchComponentName,
+														  const InputBindingInfo_t *pOriginInfo, uint32_t unBindingInfoSize, uint32_t unBindingInfoCount,
+														  vr::RenderModel_ComponentState_t *pComponentState) = 0;
+
+		// --------------- Legacy Input ------------------- //
+		virtual bool IsUsingLegacyInput() = 0;
+
+		// --------------- Utilities ------------------- //
+
+		/** Opens the binding user interface. If no app key is provided it will use the key from the calling process.
+		 * If no set is provided it will open to the root of the app binding page. */
+		virtual EVRInputError OpenBindingUI(const char *pchAppKey, VRActionSetHandle_t ulActionSetHandle, VRInputValueHandle_t ulDeviceHandle, bool bShowOnDesktop) = 0;
+
+		/** Returns the variant set in the current bindings. If the binding doesn't include a variant setting, this function
+		 * will return an empty string */
+		virtual EVRInputError GetBindingVariant(vr::VRInputValueHandle_t ulDevicePath,
+												VR_OUT_STRING() char *pchVariantArray, uint32_t unVariantArraySize) = 0;
+	};
+
+	static const char *const IVRInput_Version = "IVRInput_010";
+
+} // namespace vr
+
+// ivriobuffer.h
+
+namespace vr
+{
+
+	typedef uint64_t IOBufferHandle_t;
+	static const uint64_t k_ulInvalidIOBufferHandle = 0;
+
+	enum EIOBufferError
+	{
+		IOBuffer_Success = 0,
+		IOBuffer_OperationFailed = 100,
+		IOBuffer_InvalidHandle = 101,
+		IOBuffer_InvalidArgument = 102,
+		IOBuffer_PathExists = 103,
+		IOBuffer_PathDoesNotExist = 104,
+		IOBuffer_Permission = 105,
+	};
+
+	enum EIOBufferMode
+	{
+		IOBufferMode_Read = 0x0001,
+		IOBufferMode_Write = 0x0002,
+		IOBufferMode_Create = 0x0200,
+	};
+
+	// ----------------------------------------------------------------------------------------------
+	// Purpose:
+	// ----------------------------------------------------------------------------------------------
+	class IVRIOBuffer
+	{
+	public:
+		/** opens an existing or creates a new IOBuffer of unSize bytes */
+		virtual vr::EIOBufferError Open(const char *pchPath, vr::EIOBufferMode mode, uint32_t unElementSize, uint32_t unElements, vr::IOBufferHandle_t *pulBuffer) = 0;
+
+		/** closes a previously opened or created buffer */
+		virtual vr::EIOBufferError Close(vr::IOBufferHandle_t ulBuffer) = 0;
+
+		/** reads up to unBytes from buffer into *pDst, returning number of bytes read in *punRead */
+		virtual vr::EIOBufferError Read(vr::IOBufferHandle_t ulBuffer, void *pDst, uint32_t unBytes, uint32_t *punRead) = 0;
+
+		/** writes unBytes of data from *pSrc into a buffer. */
+		virtual vr::EIOBufferError Write(vr::IOBufferHandle_t ulBuffer, void *pSrc, uint32_t unBytes) = 0;
+
+		/** retrieves the property container of an buffer. */
+		virtual vr::PropertyContainerHandle_t PropertyContainer(vr::IOBufferHandle_t ulBuffer) = 0;
+
+		/** inexpensively checks for readers to allow writers to fast-fail potentially expensive copies and writes. */
+		virtual bool HasReaders(vr::IOBufferHandle_t ulBuffer) = 0;
+	};
+
+	static const char *IVRIOBuffer_Version = "IVRIOBuffer_002";
+}
+
+// ivrspatialanchors.h
+
+namespace vr
+{
+	static const SpatialAnchorHandle_t k_ulInvalidSpatialAnchorHandle = 0;
+
+	struct SpatialAnchorPose_t
+	{
+		HmdMatrix34_t mAnchorToAbsoluteTracking;
+	};
+
+	class IVRSpatialAnchors
+	{
+	public:
+		/** Returns a handle for an spatial anchor described by "descriptor".  On success, pHandle
+		 * will contain a handle valid for this session.  Caller can wait for an event or occasionally
+		 * poll GetSpatialAnchorPose() to find the virtual coordinate associated with this anchor. */
+		virtual EVRSpatialAnchorError CreateSpatialAnchorFromDescriptor(const char *pchDescriptor, SpatialAnchorHandle_t *pHandleOut) = 0;
+
+		/** Returns a handle for an new spatial anchor at pPose.  On success, pHandle
+		 * will contain a handle valid for this session.  Caller can wait for an event or occasionally
+		 * poll GetSpatialAnchorDescriptor() to find the permanent descriptor for this pose.
+		 * The result of GetSpatialAnchorPose() may evolve from this initial position if the driver chooses
+		 * to update it.
+		 * The anchor will be associated with the driver that provides unDeviceIndex, and the driver may use that specific
+		 * device as a hint for how to best create the anchor.
+		 * The eOrigin must match whatever tracking origin you are working in (seated/standing/raw).
+		 * This should be called when the user is close to (and ideally looking at/interacting with) the target physical
+		 * location.  At that moment, the driver will have the most information about how to recover that physical point
+		 * in the future, and the quality of the anchor (when the descriptor is re-used) will be highest.
+		 * The caller may decide to apply offsets from this initial pose, but is advised to stay relatively close to the
+		 * original pose location for highest fidelity. */
+		virtual EVRSpatialAnchorError CreateSpatialAnchorFromPose(TrackedDeviceIndex_t unDeviceIndex, ETrackingUniverseOrigin eOrigin, SpatialAnchorPose_t *pPose, SpatialAnchorHandle_t *pHandleOut) = 0;
+
+		/** Get the pose for a given handle.  This is intended to be cheap enough to call every frame (or fairly often)
+		 * so that the driver can refine this position when it has more information available. */
+		virtual EVRSpatialAnchorError GetSpatialAnchorPose(SpatialAnchorHandle_t unHandle, ETrackingUniverseOrigin eOrigin, SpatialAnchorPose_t *pPoseOut) = 0;
+
+		/** Get the descriptor for a given handle.  This will be empty for handles where the driver has not
+		 * yet built a descriptor.  It will be the application-supplied descriptor for previously saved anchors
+		 * that the application is requesting poses for.  If the driver has called UpdateSpatialAnchorDescriptor()
+		 * already in this session, it will be the descriptor provided by the driver.
+		 * Returns true if the descriptor fits into the buffer, else false.  Buffer size should be at least
+		 * k_unMaxSpatialAnchorDescriptorSize. */
+		virtual EVRSpatialAnchorError GetSpatialAnchorDescriptor(SpatialAnchorHandle_t unHandle, VR_OUT_STRING() char *pchDescriptorOut, uint32_t *punDescriptorBufferLenInOut) = 0;
+	};
+
+	static const char *const IVRSpatialAnchors_Version = "IVRSpatialAnchors_001";
+
+} // namespace vr
+
+// ivrdebug.h
+
+namespace vr
+{
+	enum EVRDebugError
+	{
+		VRDebugError_Success = 0,
+		VRDebugError_BadParameter
+	};
+
+	/** Handle for vr profiler events */
+	typedef uint64_t VrProfilerEventHandle_t;
+
+	class IVRDebug
+	{
+	public:
+		/** Create a vr profiler discrete event (point)
+		 * The event will be associated with the message provided in pchMessage, and the current
+		 * time will be used as the event timestamp. */
+		virtual EVRDebugError EmitVrProfilerEvent(const char *pchMessage) = 0;
+
+		/** Create an vr profiler duration event (line)
+		 * The current time will be used as the timestamp for the start of the line.
+		 * On success, pHandleOut will contain a handle valid for terminating this event. */
+		virtual EVRDebugError BeginVrProfilerEvent(VrProfilerEventHandle_t *pHandleOut) = 0;
+
+		/** Terminate a vr profiler event
+		 * The event associated with hHandle will be considered completed when this method is called.
+		 * The current time will be used assocaited to the termination time of the event, and
+		 * pchMessage will be used as the event title. */
+		virtual EVRDebugError FinishVrProfilerEvent(VrProfilerEventHandle_t hHandle, const char *pchMessage) = 0;
+
+		/** Sends a request to the driver for the specified device and returns the response. The maximum response size is 32k,
+		 * but this method can be called with a smaller buffer. If the response exceeds the size of the buffer, it is truncated.
+		 * The size of the response including its terminating null is returned. */
+		virtual uint32_t DriverDebugRequest(vr::TrackedDeviceIndex_t unDeviceIndex, const char *pchRequest, VR_OUT_STRING() char *pchResponseBuffer, uint32_t unResponseBufferSize) = 0;
+	};
+
+	static const char *const IVRDebug_Version = "IVRDebug_001";
+
+} // namespace vr
+// End
+
+#endif // _OPENVR_API
+
+namespace vr
+{
+#if !defined(OPENVR_INTERFACE_INTERNAL)
+
+	/** Finds the active installation of the VR API and initializes it. The provided path must be absolute
+	 * or relative to the current working directory. These are the local install versions of the equivalent
+	 * functions in steamvr.h and will work without a local Steam install.
+	 *
+	 * This path is to the "root" of the VR API install. That's the directory with
+	 * the "drivers" directory and a platform (i.e. "win32") directory in it, not the directory with the DLL itself.
+	 *
+	 * pStartupInfo is reserved for future use.
+	 */
+	inline IVRSystem *VR_Init(EVRInitError *peError, EVRApplicationType eApplicationType, const char *pStartupInfo = nullptr);
+
+	/** unloads vrclient.dll. Any interface pointers from the interface are
+	 * invalid after this point */
+	inline void VR_Shutdown();
+
+	/** Returns true if there is an HMD attached. This check is as lightweight as possible and
+	 * can be called outside of VR_Init/VR_Shutdown. It should be used when an application wants
+	 * to know if initializing VR is a possibility but isn't ready to take that step yet.
+	 */
+	VR_INTERFACE bool VR_CALLTYPE VR_IsHmdPresent();
+
+	/** Returns true if the OpenVR runtime is installed. */
+	VR_INTERFACE bool VR_CALLTYPE VR_IsRuntimeInstalled();
+
+	/** Returns where the OpenVR runtime is installed. */
+	VR_INTERFACE bool VR_GetRuntimePath(VR_OUT_STRING() char *pchPathBuffer, uint32_t unBufferSize, uint32_t *punRequiredBufferSize);
+
+	/** Returns the name of the enum value for an EVRInitError. This function may be called outside of VR_Init()/VR_Shutdown(). */
+	VR_INTERFACE const char *VR_CALLTYPE VR_GetVRInitErrorAsSymbol(EVRInitError error);
+
+	/** Returns an English string for an EVRInitError. Applications should call VR_GetVRInitErrorAsSymbol instead and
+	 * use that as a key to look up their own localized error message. This function may be called outside of VR_Init()/VR_Shutdown(). */
+	VR_INTERFACE const char *VR_CALLTYPE VR_GetVRInitErrorAsEnglishDescription(EVRInitError error);
+
+	/** Returns the interface of the specified version. This method must be called after VR_Init. The
+	 * pointer returned is valid until VR_Shutdown is called.
+	 */
+	VR_INTERFACE void *VR_CALLTYPE VR_GetGenericInterface(const char *pchInterfaceVersion, EVRInitError *peError);
+
+	/** Returns whether the interface of the specified version exists.
+	 */
+	VR_INTERFACE bool VR_CALLTYPE VR_IsInterfaceVersionValid(const char *pchInterfaceVersion);
+
+	/** Returns a token that represents whether the VR interface handles need to be reloaded */
+	VR_INTERFACE uint32_t VR_CALLTYPE VR_GetInitToken();
+
+	// These typedefs allow old enum names from SDK 0.9.11 to be used in applications.
+	// They will go away in the future.
+	typedef EVRInitError HmdError;
+	typedef EVREye Hmd_Eye;
+	typedef EColorSpace ColorSpace;
+	typedef ETrackingResult HmdTrackingResult;
+	typedef ETrackedDeviceClass TrackedDeviceClass;
+	typedef ETrackingUniverseOrigin TrackingUniverseOrigin;
+	typedef ETrackedDeviceProperty TrackedDeviceProperty;
+	typedef ETrackedPropertyError TrackedPropertyError;
+	typedef EVRSubmitFlags VRSubmitFlags_t;
+	typedef EVRState VRState_t;
+	typedef ECollisionBoundsStyle CollisionBoundsStyle_t;
+	typedef EVROverlayError VROverlayError;
+	typedef EVRFirmwareError VRFirmwareError;
+	typedef EVRCompositorError VRCompositorError;
+	typedef EVRScreenshotError VRScreenshotsError;
+
+	inline uint32_t &VRToken()
+	{
+		static uint32_t token;
+		return token;
+	}
+
+	class COpenVRContext
+	{
+	public:
+		COpenVRContext() { Clear(); }
+		void Clear();
+
+		inline void CheckClear()
+		{
+			if (VRToken() != VR_GetInitToken())
+			{
+				Clear();
+				VRToken() = VR_GetInitToken();
+			}
+		}
+
+		IVRSystem *VRSystem()
+		{
+			CheckClear();
+			if (m_pVRSystem == nullptr)
+			{
+				EVRInitError eError;
+				m_pVRSystem = (IVRSystem *)VR_GetGenericInterface(IVRSystem_Version, &eError);
+			}
+			return m_pVRSystem;
+		}
+		IVRChaperone *VRChaperone()
+		{
+			CheckClear();
+			if (m_pVRChaperone == nullptr)
+			{
+				EVRInitError eError;
+				m_pVRChaperone = (IVRChaperone *)VR_GetGenericInterface(IVRChaperone_Version, &eError);
+			}
+			return m_pVRChaperone;
+		}
+
+		IVRChaperoneSetup *VRChaperoneSetup()
+		{
+			CheckClear();
+			if (m_pVRChaperoneSetup == nullptr)
+			{
+				EVRInitError eError;
+				m_pVRChaperoneSetup = (IVRChaperoneSetup *)VR_GetGenericInterface(IVRChaperoneSetup_Version, &eError);
+			}
+			return m_pVRChaperoneSetup;
+		}
+
+		IVRCompositor *VRCompositor()
+		{
+			CheckClear();
+			if (m_pVRCompositor == nullptr)
+			{
+				EVRInitError eError;
+				m_pVRCompositor = (IVRCompositor *)VR_GetGenericInterface(IVRCompositor_Version, &eError);
+			}
+			return m_pVRCompositor;
+		}
+
+		IVROverlay *VROverlay()
+		{
+			CheckClear();
+			if (m_pVROverlay == nullptr)
+			{
+				EVRInitError eError;
+				m_pVROverlay = (IVROverlay *)VR_GetGenericInterface(IVROverlay_Version, &eError);
+			}
+			return m_pVROverlay;
+		}
+
+		IVROverlayView *VROverlayView()
+		{
+			CheckClear();
+			if (m_pVROverlayView == nullptr)
+			{
+				EVRInitError eError;
+				m_pVROverlayView = (IVROverlayView *)VR_GetGenericInterface(IVROverlayView_Version, &eError);
+			}
+			return m_pVROverlayView;
+		}
+
+		IVRHeadsetView *VRHeadsetView()
+		{
+			CheckClear();
+			if (m_pVRHeadsetView == nullptr)
+			{
+				EVRInitError eError;
+				m_pVRHeadsetView = (IVRHeadsetView *)VR_GetGenericInterface(IVRHeadsetView_Version, &eError);
+			}
+			return m_pVRHeadsetView;
+		}
+
+		IVRResources *VRResources()
+		{
+			CheckClear();
+			if (m_pVRResources == nullptr)
+			{
+				EVRInitError eError;
+				m_pVRResources = (IVRResources *)VR_GetGenericInterface(IVRResources_Version, &eError);
+			}
+			return m_pVRResources;
+		}
+
+		IVRScreenshots *VRScreenshots()
+		{
+			CheckClear();
+			if (m_pVRScreenshots == nullptr)
+			{
+				EVRInitError eError;
+				m_pVRScreenshots = (IVRScreenshots *)VR_GetGenericInterface(IVRScreenshots_Version, &eError);
+			}
+			return m_pVRScreenshots;
+		}
+
+		IVRRenderModels *VRRenderModels()
+		{
+			CheckClear();
+			if (m_pVRRenderModels == nullptr)
+			{
+				EVRInitError eError;
+				m_pVRRenderModels = (IVRRenderModels *)VR_GetGenericInterface(IVRRenderModels_Version, &eError);
+			}
+			return m_pVRRenderModels;
+		}
+
+		IVRExtendedDisplay *VRExtendedDisplay()
+		{
+			CheckClear();
+			if (m_pVRExtendedDisplay == nullptr)
+			{
+				EVRInitError eError;
+				m_pVRExtendedDisplay = (IVRExtendedDisplay *)VR_GetGenericInterface(IVRExtendedDisplay_Version, &eError);
+			}
+			return m_pVRExtendedDisplay;
+		}
+
+		IVRSettings *VRSettings()
+		{
+			CheckClear();
+			if (m_pVRSettings == nullptr)
+			{
+				EVRInitError eError;
+				m_pVRSettings = (IVRSettings *)VR_GetGenericInterface(IVRSettings_Version, &eError);
+			}
+			return m_pVRSettings;
+		}
+
+		IVRApplications *VRApplications()
+		{
+			CheckClear();
+			if (m_pVRApplications == nullptr)
+			{
+				EVRInitError eError;
+				m_pVRApplications = (IVRApplications *)VR_GetGenericInterface(IVRApplications_Version, &eError);
+			}
+			return m_pVRApplications;
+		}
+
+		IVRTrackedCamera *VRTrackedCamera()
+		{
+			CheckClear();
+			if (m_pVRTrackedCamera == nullptr)
+			{
+				EVRInitError eError;
+				m_pVRTrackedCamera = (IVRTrackedCamera *)VR_GetGenericInterface(IVRTrackedCamera_Version, &eError);
+			}
+			return m_pVRTrackedCamera;
+		}
+
+		IVRDriverManager *VRDriverManager()
+		{
+			CheckClear();
+			if (!m_pVRDriverManager)
+			{
+				EVRInitError eError;
+				m_pVRDriverManager = (IVRDriverManager *)VR_GetGenericInterface(IVRDriverManager_Version, &eError);
+			}
+			return m_pVRDriverManager;
+		}
+
+		IVRInput *VRInput()
+		{
+			CheckClear();
+			if (!m_pVRInput)
+			{
+				EVRInitError eError;
+				m_pVRInput = (IVRInput *)VR_GetGenericInterface(IVRInput_Version, &eError);
+			}
+			return m_pVRInput;
+		}
+
+		IVRIOBuffer *VRIOBuffer()
+		{
+			if (!m_pVRIOBuffer)
+			{
+				EVRInitError eError;
+				m_pVRIOBuffer = (IVRIOBuffer *)VR_GetGenericInterface(IVRIOBuffer_Version, &eError);
+			}
+			return m_pVRIOBuffer;
+		}
+
+		IVRSpatialAnchors *VRSpatialAnchors()
+		{
+			CheckClear();
+			if (!m_pVRSpatialAnchors)
+			{
+				EVRInitError eError;
+				m_pVRSpatialAnchors = (IVRSpatialAnchors *)VR_GetGenericInterface(IVRSpatialAnchors_Version, &eError);
+			}
+			return m_pVRSpatialAnchors;
+		}
+
+		IVRDebug *VRDebug()
+		{
+			CheckClear();
+			if (!m_pVRDebug)
+			{
+				EVRInitError eError;
+				m_pVRDebug = (IVRDebug *)VR_GetGenericInterface(IVRDebug_Version, &eError);
+			}
+			return m_pVRDebug;
+		}
+
+		IVRNotifications *VRNotifications()
+		{
+			CheckClear();
+			if (!m_pVRNotifications)
+			{
+				EVRInitError eError;
+				m_pVRNotifications = (IVRNotifications *)VR_GetGenericInterface(IVRNotifications_Version, &eError);
+			}
+			return m_pVRNotifications;
+		}
+
+	private:
+		IVRSystem *m_pVRSystem;
+		IVRChaperone *m_pVRChaperone;
+		IVRChaperoneSetup *m_pVRChaperoneSetup;
+		IVRCompositor *m_pVRCompositor;
+		IVRHeadsetView *m_pVRHeadsetView;
+		IVROverlay *m_pVROverlay;
+		IVROverlayView *m_pVROverlayView;
+		IVRResources *m_pVRResources;
+		IVRRenderModels *m_pVRRenderModels;
+		IVRExtendedDisplay *m_pVRExtendedDisplay;
+		IVRSettings *m_pVRSettings;
+		IVRApplications *m_pVRApplications;
+		IVRTrackedCamera *m_pVRTrackedCamera;
+		IVRScreenshots *m_pVRScreenshots;
+		IVRDriverManager *m_pVRDriverManager;
+		IVRInput *m_pVRInput;
+		IVRIOBuffer *m_pVRIOBuffer;
+		IVRSpatialAnchors *m_pVRSpatialAnchors;
+		IVRDebug *m_pVRDebug;
+		IVRNotifications *m_pVRNotifications;
+	};
+
+	inline COpenVRContext &OpenVRInternal_ModuleContext()
+	{
+		static void *ctx[sizeof(COpenVRContext) / sizeof(void *)];
+		return *(COpenVRContext *)ctx; // bypass zero-init constructor
+	}
+
+	inline IVRSystem *VR_CALLTYPE VRSystem() { return OpenVRInternal_ModuleContext().VRSystem(); }
+	inline IVRChaperone *VR_CALLTYPE VRChaperone() { return OpenVRInternal_ModuleContext().VRChaperone(); }
+	inline IVRChaperoneSetup *VR_CALLTYPE VRChaperoneSetup() { return OpenVRInternal_ModuleContext().VRChaperoneSetup(); }
+	inline IVRCompositor *VR_CALLTYPE VRCompositor() { return OpenVRInternal_ModuleContext().VRCompositor(); }
+	inline IVROverlay *VR_CALLTYPE VROverlay() { return OpenVRInternal_ModuleContext().VROverlay(); }
+	inline IVROverlayView *VR_CALLTYPE VROverlayView() { return OpenVRInternal_ModuleContext().VROverlayView(); }
+	inline IVRHeadsetView *VR_CALLTYPE VRHeadsetView() { return OpenVRInternal_ModuleContext().VRHeadsetView(); }
+	inline IVRScreenshots *VR_CALLTYPE VRScreenshots() { return OpenVRInternal_ModuleContext().VRScreenshots(); }
+	inline IVRRenderModels *VR_CALLTYPE VRRenderModels() { return OpenVRInternal_ModuleContext().VRRenderModels(); }
+	inline IVRApplications *VR_CALLTYPE VRApplications() { return OpenVRInternal_ModuleContext().VRApplications(); }
+	inline IVRSettings *VR_CALLTYPE VRSettings() { return OpenVRInternal_ModuleContext().VRSettings(); }
+	inline IVRResources *VR_CALLTYPE VRResources() { return OpenVRInternal_ModuleContext().VRResources(); }
+	inline IVRExtendedDisplay *VR_CALLTYPE VRExtendedDisplay() { return OpenVRInternal_ModuleContext().VRExtendedDisplay(); }
+	inline IVRTrackedCamera *VR_CALLTYPE VRTrackedCamera() { return OpenVRInternal_ModuleContext().VRTrackedCamera(); }
+	inline IVRDriverManager *VR_CALLTYPE VRDriverManager() { return OpenVRInternal_ModuleContext().VRDriverManager(); }
+	inline IVRInput *VR_CALLTYPE VRInput() { return OpenVRInternal_ModuleContext().VRInput(); }
+	inline IVRIOBuffer *VR_CALLTYPE VRIOBuffer() { return OpenVRInternal_ModuleContext().VRIOBuffer(); }
+	inline IVRSpatialAnchors *VR_CALLTYPE VRSpatialAnchors() { return OpenVRInternal_ModuleContext().VRSpatialAnchors(); }
+	inline IVRNotifications *VR_CALLTYPE VRNotifications() { return OpenVRInternal_ModuleContext().VRNotifications(); }
+	inline IVRDebug *VR_CALLTYPE VRDebug() { return OpenVRInternal_ModuleContext().VRDebug(); }
+
+	inline void COpenVRContext::Clear()
+	{
+		m_pVRSystem = nullptr;
+		m_pVRChaperone = nullptr;
+		m_pVRChaperoneSetup = nullptr;
+		m_pVRCompositor = nullptr;
+		m_pVROverlay = nullptr;
+		m_pVROverlayView = nullptr;
+		m_pVRHeadsetView = nullptr;
+		m_pVRRenderModels = nullptr;
+		m_pVRExtendedDisplay = nullptr;
+		m_pVRSettings = nullptr;
+		m_pVRApplications = nullptr;
+		m_pVRTrackedCamera = nullptr;
+		m_pVRResources = nullptr;
+		m_pVRScreenshots = nullptr;
+		m_pVRDriverManager = nullptr;
+		m_pVRInput = nullptr;
+		m_pVRIOBuffer = nullptr;
+		m_pVRSpatialAnchors = nullptr;
+		m_pVRNotifications = nullptr;
+		m_pVRDebug = nullptr;
+	}
+
+	VR_INTERFACE uint32_t VR_CALLTYPE VR_InitInternal2(EVRInitError *peError, EVRApplicationType eApplicationType, const char *pStartupInfo);
+	VR_INTERFACE void VR_CALLTYPE VR_ShutdownInternal();
+
+	/** Finds the active installation of vrclient.dll and initializes it */
+	inline IVRSystem *VR_Init(EVRInitError *peError, EVRApplicationType eApplicationType, const char *pStartupInfo)
+	{
+		IVRSystem *pVRSystem = nullptr;
+
+		EVRInitError eError;
+		VRToken() = VR_InitInternal2(&eError, eApplicationType, pStartupInfo);
+		COpenVRContext &ctx = OpenVRInternal_ModuleContext();
+		ctx.Clear();
+
+		if (eError == VRInitError_None)
+		{
+			if (VR_IsInterfaceVersionValid(IVRSystem_Version))
+			{
+				pVRSystem = VRSystem();
+			}
+			else
+			{
+				VR_ShutdownInternal();
+				eError = VRInitError_Init_InterfaceNotFound;
+			}
+		}
+
+		if (peError)
+			*peError = eError;
+		return pVRSystem;
+	}
+
+	/** unloads vrclient.dll. Any interface pointers from the interface are
+	 * invalid after this point */
+	inline void VR_Shutdown()
+	{
+		VR_ShutdownInternal();
+	}
+
+#endif // OPENVR_INTERFACE_INTERNAL
+}
diff --git a/src/main.cpp b/src/main.cpp
new file mode 100644
index 0000000..8ce5919
--- /dev/null
+++ b/src/main.cpp
@@ -0,0 +1,113 @@
+#include <signal.h>
+#include <assert.h>
+
+#include <X11/extensions/Xcomposite.h>
+#include <X11/Xutil.h>
+#include <GLFW/glfw3.h>
+
+#include "openvr/openvr.h"
+
+static vr::ETrackingUniverseOrigin TRACKING_UNIVERSE = vr::ETrackingUniverseOrigin::TrackingUniverseStanding;
+
+#define WIDTH 1024
+#define HEIGHT 1024
+
+Display *xdisplay;
+Window root_window;
+
+vr::IVRSystem *ovr_sys;
+vr::IVROverlay *ovr_overlay;
+vr::VROverlayHandle_t handle;
+
+GLuint overlaytexture;
+GLFWwindow *gl_window;
+
+void cleanup(int _sig = 0);
+
+int main(int argc, char **argv)
+{
+	signal(SIGINT, cleanup);
+	{
+		xdisplay = XOpenDisplay(nullptr);
+		assert(xdisplay != nullptr);
+		printf("Created X11 display\n");
+		root_window = XRootWindow(xdisplay, 0);
+	}
+
+	{
+		assert(glfwInit() == true);
+		glfwWindowHint(GLFW_VISIBLE, false);
+		gl_window = glfwCreateWindow(WIDTH, HEIGHT, "Overlay", nullptr, nullptr);
+		assert(gl_window != nullptr);
+		glfwMakeContextCurrent(gl_window);
+		printf("Created GLFW context\n");
+	}
+
+	{
+		vr::EVRInitError init_err;
+		ovr_sys = vr::VR_Init(&init_err, vr::EVRApplicationType::VRApplication_Overlay);
+		assert(init_err == 0);
+		ovr_overlay = vr::VROverlay();
+		printf("Initialized openvr overlay\n");
+	}
+
+	{
+		auto overlay_err = ovr_overlay->CreateOverlay("deskpot", "Desktop view", &handle);
+		assert(overlay_err == 0);
+		ovr_overlay->ShowOverlay(handle);
+		ovr_overlay->SetOverlayTextureColorSpace(handle, vr::EColorSpace::ColorSpace_Gamma);
+		ovr_overlay->SetOverlayWidthInMeters(handle, 0.5f);
+		uint8_t col[4] = {20, 100, 100, 255};
+		ovr_overlay->SetOverlayRaw(handle, &col, 1, 1, 4);
+		printf("Created overlay instance\n");
+	}
+
+	{
+		vr::HmdMatrix34_t transform;
+		auto err = ovr_overlay->GetOverlayTransformAbsolute(handle, &TRACKING_UNIVERSE, &transform);
+		assert(err == 0);
+		transform.m[1][1] = -1;
+		err = ovr_overlay->SetOverlayTransformAbsolute(handle, TRACKING_UNIVERSE, &transform);
+		assert(err == 0);
+	}
+
+	{
+		glGenTextures(1, &overlaytexture);
+		glBindTexture(GL_TEXTURE_2D, overlaytexture);
+	}
+
+	vr::Texture_t vr_texture;
+	vr_texture.eColorSpace = vr::EColorSpace::ColorSpace_Auto;
+	vr_texture.eType = vr::ETextureType::TextureType_OpenGL;
+
+	while (1)
+	{
+		auto frame = XGetImage(xdisplay, root_window, 0, 0, WIDTH, HEIGHT, AllPlanes, ZPixmap);
+		glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, WIDTH, HEIGHT, 0, GL_BGRA, GL_UNSIGNED_BYTE, frame->data);
+		XDestroyImage(frame);
+
+		{
+			vr_texture.handle = (void *)(uintptr_t)overlaytexture;
+			auto set_err = ovr_overlay->SetOverlayTexture(handle, &vr_texture);
+			if (set_err)
+			{
+				printf("error setting texture: %d\n", set_err);
+				assert(set_err == 0);
+			}
+		}
+		glfwSwapBuffers(gl_window);
+
+		ovr_overlay->WaitFrameSync(20);
+	}
+	cleanup();
+	return 0;
+}
+
+void cleanup(int _sig)
+{
+	printf("\nShutting down\n");
+	vr::VR_Shutdown();
+	glfwDestroyWindow(gl_window);
+	glfwTerminate();
+	exit(0);
+}
\ No newline at end of file