#pragma once

// openvr_driver.h
//========= Copyright Valve Corporation ============//
// Dynamically generated file. Do not modify this file directly.

#ifndef _OPENVR_DRIVER_API
#define _OPENVR_DRIVER_API

#include <stdint.h>



// 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 )

typedef void* glSharedTextureHandle_t;
typedef int32_t glInt_t;
typedef uint32_t glUInt_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 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 HmdColor_t
{
	float r, g, b, a;
};

struct HmdQuad_t
{
	HmdVector3_t vCorners[ 4 ];
};

struct HmdRect2_t
{
	HmdVector2_t vTopLeft;
	HmdVector2_t vBottomRight;
};

/** 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_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
	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
};

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,
};

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
};


/** 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_Max = 4
};


/** 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.
};

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_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_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_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

	// 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,
	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,

	// 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,

	// 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

	// Properties that are used by helpers, but are opaque to applications
	Prop_DisplayHiddenArea_Binary_Start				= 5100,
	Prop_DisplayHiddenArea_Binary_End				= 5150,
	Prop_ParentContainer							= 5151,

	// 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,

	// Properties that are set internally based on other information provided by drivers
	Prop_ControllerType_String					= 7000,
	Prop_LegacyInputProfile_String				= 7001,

	// 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,
};

/** 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,
};

/** Data required for passing Vulkan textures to IVRCompositor::Submit.
* Be sure to call OpenVR_Shutdown before destroying these resources. */
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 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, // data is dualAnalog
	VREvent_DualAnalog_Unpress			= 251, // data is dualAnalog
	VREvent_DualAnalog_Touch			= 252, // data is dualAnalog
	VREvent_DualAnalog_Untouch			= 253, // data is dualAnalog
	VREvent_DualAnalog_Move				= 254, // data is dualAnalog
	VREvent_DualAnalog_ModeSwitch1		= 255, // data is dualAnalog
	VREvent_DualAnalog_ModeSwitch2		= 256, // data is dualAnalog
	VREvent_DualAnalog_Cancel			= 257, // data is dualAnalog

	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_Scroll						= 305, // data is mouse
	VREvent_TouchPadMove				= 306, // data is mouse
	VREvent_OverlayFocusChanged			= 307, // data is overlay, global event

	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, // data is process
	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_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
	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
	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_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_ChaperoneDataHasChanged			= 800,
	VREvent_ChaperoneUniverseHasChanged		= 801,
	VREvent_ChaperoneTempDataHasChanged		= 802,
	VREvent_ChaperoneSettingsHaveChanged	= 803,
	VREvent_SeatedZeroPoseReset				= 804,

	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_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,
	VREvent_Compositor_MirrorWindowHidden		= 1401,
	VREvent_Compositor_ChaperoneBoundsShown		= 1410,
	VREvent_Compositor_ChaperoneBoundsHidden	= 1411,

	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

	// 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)
};


/** 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_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 in overlay space */
struct VREvent_Scroll_t
{
	float xdelta, ydelta; // movement in fraction of the pad traversed since last delta, 1.0 for a full swipe
	uint32_t repeatCount;
};

/** 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;
};


/** Used for a few events about overlays */
struct VREvent_Overlay_t
{
	uint64_t overlayHandle;
	uint64_t devicePath;
};


/** 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;
};

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;
};

enum EDualAnalogWhich
{
	k_EDualAnalog_Left = 0,
	k_EDualAnalog_Right = 1,
};

struct VREvent_DualAnalog_t
{
	float x, y; // coordinates are -1..1 analog values
	float transformedX, transformedY; // transformed by the center and radius numbers provided by the overlay
	EDualAnalogWhich which;
};

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;
};

/** NOTE!!! If you change this you MUST manually update openvr_interop.cs.py */
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_DualAnalog_t dualAnalog;
	VREvent_HapticVibration_t hapticVibration;
	VREvent_WebConsole_t webConsole;
} 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

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,
};


/** 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
};

/** Allows the application to customize how the overlay appears in the compositor */
struct Compositor_OverlaySettings
{
	uint32_t size; // sizeof(Compositor_OverlaySettings)
	bool curved, antialias;
	float scale, distance, alpha;
	float uOffset, vOffset, uScale, vScale;
	float gridDivs, gridWidth, gridScale;
	HmdMatrix44_t transform;
};

/** 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,
};

/** 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, // Start up SteamVR

	VRApplication_Max
};


/** 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,
};


/** 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_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_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_Compositor_Failed					= 400,
	VRInitError_Compositor_D3D11HardwareRequired	= 401,
	VRInitError_Compositor_FirmwareRequiresUpdate	= 402,
	VRInitError_Compositor_OverlayInitFailed		= 403,
	VRInitError_Compositor_ScreenshotsInitFailed	= 404,
	VRInitError_Compositor_UnableToCreateDevice		= 405,

	VRInitError_VendorSpecific_UnableToConnectToOculusRuntime		= 1000,
	VRInitError_VendorSpecific_WindowsNotInDevMode					= 1001,

	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_Steam_SteamInstallationNotFound = 2000,
};

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
};

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 standingTrackedDevicePose;
};

// Screenshot types
typedef uint32_t ScreenshotHandle_t;

static const uint32_t k_unScreenshotHandleInvalid = 0;

/** 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;
};

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)
};

#pragma pack( pop )

// figure out how to import from the VR API dll
#if defined(_WIN32)

#ifdef VR_API_EXPORT
#define VR_INTERFACE extern "C" __declspec( dllexport )
#else
#define VR_INTERFACE extern "C" __declspec( dllimport )
#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 ";" )

// vrtrackedcameratypes.h
#ifndef _VRTRACKEDCAMERATYPES_H
#define _VRTRACKEDCAMERATYPES_H 

namespace vr
{

#pragma pack( push, 8 )

enum ECameraVideoStreamFormat
{
	CVS_FORMAT_UNKNOWN = 0,
	CVS_FORMAT_RAW10 = 1,		// 10 bits per pixel
	CVS_FORMAT_NV12 = 2,		// 12 bits per pixel
	CVS_FORMAT_RGB24 = 3,		// 24 bits per pixel
	CVS_FORMAT_NV12_2 = 4,		// 12 bits per pixel, 2x height
	CVS_MAX_FORMATS
};

enum ECameraCompatibilityMode
{
	CAMERA_COMPAT_MODE_BULK_DEFAULT = 0,
	CAMERA_COMPAT_MODE_BULK_64K_DMA,
	CAMERA_COMPAT_MODE_BULK_16K_DMA,
	CAMERA_COMPAT_MODE_BULK_8K_DMA,
	CAMERA_COMPAT_MODE_ISO_52FPS,
	CAMERA_COMPAT_MODE_ISO_50FPS,
	CAMERA_COMPAT_MODE_ISO_48FPS,
	CAMERA_COMPAT_MODE_ISO_46FPS,
	CAMERA_COMPAT_MODE_ISO_44FPS,
	CAMERA_COMPAT_MODE_ISO_42FPS,
	CAMERA_COMPAT_MODE_ISO_40FPS,
	CAMERA_COMPAT_MODE_ISO_35FPS,
	CAMERA_COMPAT_MODE_ISO_30FPS,
	MAX_CAMERA_COMPAT_MODES
};

enum ETrackedCameraRoomViewMode
{
	TRACKED_CAMERA_ROOMVIEW_MODE_DEFAULT = 0,
	TRACKED_CAMERA_ROOMVIEW_MODE_EDGE_A,
	TRACKED_CAMERA_ROOMVIEW_MODE_EDGE_B,
	TRACKED_CAMERA_ROOMVIEW_MODE_VIDEO_TRANSLUSCENT,
	TRACKED_CAMERA_ROOMVIEW_MODE_VIDEO_OPAQUE,
	TRACKED_CAMERA_ROOMVIEW_MODE_COUNT,
};

#ifdef _MSC_VER
#define VR_CAMERA_DECL_ALIGN( x ) __declspec( align( x ) )
#else
#define VR_CAMERA_DECL_ALIGN( x ) //
#endif

#define MAX_CAMERA_FRAME_SHARED_HANDLES	4

VR_CAMERA_DECL_ALIGN( 8 ) struct CameraVideoStreamFrame_t
{
	ECameraVideoStreamFormat m_nStreamFormat;

	uint32_t m_nWidth;
	uint32_t m_nHeight;

	uint32_t m_nImageDataSize;						// Based on stream format, width, height

	uint32_t m_nFrameSequence;						// Starts from 0 when stream starts.

	uint32_t m_nBufferIndex;						// Identifies which buffer the image data is hosted
	uint32_t m_nBufferCount;						// Total number of configured buffers

	uint32_t m_nExposureTime;

	uint32_t m_nISPFrameTimeStamp;					// Driver provided time stamp per driver centric time base
	uint32_t m_nISPReferenceTimeStamp;
	uint32_t m_nSyncCounter;

	uint32_t m_nCamSyncEvents;
	uint32_t m_nISPSyncEvents;

	double m_flReferenceCamSyncTime;

	double m_flFrameElapsedTime;					// Starts from 0 when stream starts. In seconds.
	double m_flFrameDeliveryRate;

	double m_flFrameCaptureTime_DriverAbsolute;		// In USB time, via AuxEvent
	double m_flFrameCaptureTime_ServerRelative;		// In System time within the server
	uint64_t m_nFrameCaptureTicks_ServerAbsolute;	// In system ticks within the server
	double m_flFrameCaptureTime_ClientRelative;		// At the client, relative to when the frame was exposed/captured.

	double m_flSyncMarkerError;

	TrackedDevicePose_t m_StandingTrackedDevicePose;	// Supplied by HMD layer when used as a tracked camera

	uint64_t m_pImageData;
};

#pragma pack( pop )

}

#endif // _VRTRACKEDCAMERATYPES_H
// ivrsettings.h
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;

		// Returns true if file sync occurred (force or settings dirty)
		virtual bool Sync( bool bForce = false, EVRSettingsError *peError = nullptr ) = 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_002";

	//-----------------------------------------------------------------------------
	// 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_ShowStage_Bool = "showStage";
	static const char * const k_pch_SteamVR_ActivateMultipleDrivers_Bool = "activateMultipleDrivers";
	static const char * const k_pch_SteamVR_DirectMode_Bool = "directMode";
	static const char * const k_pch_SteamVR_DirectModeEdidVid_Int32 = "directModeEdidVid";
	static const char * const k_pch_SteamVR_DirectModeEdidPid_Int32 = "directModeEdidPid";
	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_Bool = "basestationPowerManagement";
	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_AllowAsyncReprojection_Bool = "allowAsyncReprojection";
	static const char * const k_pch_SteamVR_AllowReprojection_Bool = "allowInterleavedReprojection";
	static const char * const k_pch_SteamVR_ForceReprojection_Bool = "forceReprojection";
	static const char * const k_pch_SteamVR_ForceFadeOnBadTracking_Bool = "forceFadeOnBadTracking";
	static const char * const k_pch_SteamVR_DefaultMirrorView_Int32 = "defaultMirrorView";
	static const char * const k_pch_SteamVR_ShowMirrorView_Bool = "showMirrorView";
	static const char * const k_pch_SteamVR_MirrorViewGeometry_String = "mirrorViewGeometry";
	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_DebugInput = "debugInput";
	static const char * const k_pch_SteamVR_LegacyInputRebinding = "legacyInputRebinding";

	//-----------------------------------------------------------------------------
	// 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";

	//-----------------------------------------------------------------------------
	// 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";

	//-----------------------------------------------------------------------------
	// 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_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_HeuristicActive_Bool = "heuristicActive";
	static const char * const k_pch_Perf_NotifyInHMD_Bool = "warnInHMD";
	static const char * const k_pch_Perf_NotifyOnlyOnce_Bool = "warnOnlyOnce";
	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_LinuxGPUProfiling_Bool = "linuxGPUProfiling";

	//-----------------------------------------------------------------------------
	// 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_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";

	//-----------------------------------------------------------------------------
	// 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_EnableCameraInDashboard_Bool = "enableCameraInDashboard";
	static const char * const k_pch_Camera_EnableCameraForCollisionBounds_Bool = "enableCameraForCollisionBounds";
	static const char * const k_pch_Camera_EnableCameraForRoomView_Bool = "enableCameraForRoomView";
	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_RoomViewMode_Int32 = "cameraRoomViewMode";

	//-----------------------------------------------------------------------------
	// audio keys
	static const char * const k_pch_audio_Section = "audio";
	static const char * const k_pch_audio_OnPlaybackDevice_String = "onPlaybackDevice";
	static const char * const k_pch_audio_OnRecordDevice_String = "onRecordDevice";
	static const char * const k_pch_audio_OnPlaybackMirrorDevice_String = "onPlaybackMirrorDevice";
	static const char * const k_pch_audio_OffPlaybackDevice_String = "offPlaybackDevice";
	static const char * const k_pch_audio_OffRecordDevice_String = "offRecordDevice";
	static const char * const k_pch_audio_VIVEHDMIGain = "viveHDMIGain";

	//-----------------------------------------------------------------------------
	// 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_EnableWebUI = "webUI";
	static const char * const k_pch_Dashboard_EnableWebUIDevTools = "webUIDevTools";

	//-----------------------------------------------------------------------------
	// 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";

	//-----------------------------------------------------------------------------
	// web interface keys
	static const char* const k_pch_WebInterface_Section = "WebInterface";
	static const char* const k_pch_WebInterface_WebPort_String = "WebPort";

} // namespace vr

// iservertrackeddevicedriver.h
namespace vr
{


struct DriverPoseQuaternion_t
{
	double w, x, y, z;
};

struct DriverPose_t
{
	/* Time offset of this pose, in seconds from the actual time of the pose,
	 * relative to the time of the PoseUpdated() call made by the driver.
	 */
	double poseTimeOffset;

	/* Generally, the pose maintained by a driver
	 * is in an inertial coordinate system different
	 * from the world system of x+ right, y+ up, z+ back.
	 * Also, the driver is not usually tracking the "head" position,
	 * but instead an internal IMU or another reference point in the HMD.
	 * The following two transforms transform positions and orientations
	 * to app world space from driver world space,
	 * and to HMD head space from driver local body space. 
	 *
	 * We maintain the driver pose state in its internal coordinate system,
	 * so we can do the pose prediction math without having to
	 * use angular acceleration.  A driver's angular acceleration is generally not measured,
	 * and is instead calculated from successive samples of angular velocity.
	 * This leads to a noisy angular acceleration values, which are also
	 * lagged due to the filtering required to reduce noise to an acceptable level.
	 */
	vr::HmdQuaternion_t qWorldFromDriverRotation;
	double vecWorldFromDriverTranslation[ 3 ];

	vr::HmdQuaternion_t qDriverFromHeadRotation;
	double vecDriverFromHeadTranslation[ 3 ];

	/* State of driver pose, in meters and radians. */
	/* Position of the driver tracking reference in driver world space
	* +[0] (x) is right
	* +[1] (y) is up
	* -[2] (z) is forward
	*/
	double vecPosition[ 3 ];

	/* Velocity of the pose in meters/second */
	double vecVelocity[ 3 ];

	/* Acceleration of the pose in meters/second */
	double vecAcceleration[ 3 ];

	/* Orientation of the tracker, represented as a quaternion */
	vr::HmdQuaternion_t qRotation;

	/* Angular velocity of the pose in axis-angle 
	* representation. The direction is the angle of
	* rotation and the magnitude is the angle around
	* that axis in radians/second. */
	double vecAngularVelocity[ 3 ];

	/* Angular acceleration of the pose in axis-angle 
	* representation. The direction is the angle of
	* rotation and the magnitude is the angle around
	* that axis in radians/second^2. */
	double vecAngularAcceleration[ 3 ];

	ETrackingResult result;

	bool poseIsValid;
	bool willDriftInYaw;
	bool shouldApplyHeadModel;
	bool deviceIsConnected;
};


// ----------------------------------------------------------------------------------------------
// Purpose: Represents a single tracked device in a driver
// ----------------------------------------------------------------------------------------------
class ITrackedDeviceServerDriver
{
public:

	// ------------------------------------
	// Management Methods
	// ------------------------------------
	/** This is called before an HMD is returned to the application. It will always be
	* called before any display or tracking methods. Memory and processor use by the
	* ITrackedDeviceServerDriver object should be kept to a minimum until it is activated.
	* The pose listener is guaranteed to be valid until Deactivate is called, but
	* should not be used after that point. */
	virtual EVRInitError Activate( uint32_t unObjectId ) = 0;

	/** This is called when The VR system is switching from this Hmd being the active display
	* to another Hmd being the active display. The driver should clean whatever memory
	* and thread use it can when it is deactivated */
	virtual void Deactivate() = 0;

	/** Handles a request from the system to put this device into standby mode. What that means is defined per-device. */
	virtual void EnterStandby() = 0;

	/** Requests a component interface of the driver for device-specific functionality. The driver should return NULL
	* if the requested interface or version is not supported. */
	virtual void *GetComponent( const char *pchComponentNameAndVersion ) = 0;

	/** A VR Client has made this debug request of the driver. The set of valid requests is entirely
	* up to the driver and the client to figure out, as is the format of the response. Responses that
	* exceed the length of the supplied buffer should be truncated and null terminated */
	virtual void DebugRequest( const char *pchRequest, char *pchResponseBuffer, uint32_t unResponseBufferSize ) = 0;

	// ------------------------------------
	// Tracking Methods
	// ------------------------------------
	virtual DriverPose_t GetPose() = 0;
};



static const char *ITrackedDeviceServerDriver_Version = "ITrackedDeviceServerDriver_005";

}
// ivrdisplaycomponent.h
namespace vr
{


	// ----------------------------------------------------------------------------------------------
	// Purpose: The display component on a single tracked device
	// ----------------------------------------------------------------------------------------------
	class IVRDisplayComponent
	{
	public:

		// ------------------------------------
		// Display Methods
		// ------------------------------------

		/** 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;

		/** Returns true if the display is extending the desktop. */
		virtual bool IsDisplayOnDesktop( ) = 0;

		/** Returns true if the display is real and not a fictional display. */
		virtual bool IsDisplayRealDisplay( ) = 0;

		/** Suggested size for the intermediate render target that the distortion pulls from. */
		virtual void GetRecommendedRenderTargetSize( 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;

		/** 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;

		/** Returns 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. */
		virtual DistortionCoordinates_t ComputeDistortion( EVREye eEye, float fU, float fV ) = 0;

	};

	static const char *IVRDisplayComponent_Version = "IVRDisplayComponent_002";

}

// ivrdriverdirectmodecomponent.h
namespace vr
{


	// ----------------------------------------------------------------------------------------------
	// Purpose: This component is used for drivers that implement direct mode entirely on their own
	//			without allowing the VR Compositor to own the window/device. Chances are you don't
	//			need to implement this component in your driver.
	// ----------------------------------------------------------------------------------------------
	class IVRDriverDirectModeComponent
	{
	public:

		// -----------------------------------
		// Direct mode methods
		// -----------------------------------

		/** Specific to Oculus compositor support, textures supplied must be created using this method. */
		struct SwapTextureSetDesc_t
		{
			uint32_t nWidth;
			uint32_t nHeight;
			uint32_t nFormat;
			uint32_t nSampleCount;
		};
		virtual void CreateSwapTextureSet( uint32_t unPid, const SwapTextureSetDesc_t *pSwapTextureSetDesc, vr::SharedTextureHandle_t( *pSharedTextureHandles )[ 3 ] ) {}

		/** Used to textures created using CreateSwapTextureSet.  Only one of the set's handles needs to be used to destroy the entire set. */
		virtual void DestroySwapTextureSet( vr::SharedTextureHandle_t sharedTextureHandle ) {}

		/** Used to purge all texture sets for a given process. */
		virtual void DestroyAllSwapTextureSets( uint32_t unPid ) {}

		/** After Present returns, calls this to get the next index to use for rendering. */
		virtual void GetNextSwapTextureSetIndex( vr::SharedTextureHandle_t sharedTextureHandles[ 2 ], uint32_t( *pIndices )[ 2 ] ) {}

		/** Call once per layer to draw for this frame.  One shared texture handle per eye.  Textures must be created
		* using CreateSwapTextureSet and should be alternated per frame.  Call Present once all layers have been submitted. */
		struct SubmitLayerPerEye_t
		{
			// Shared texture handles (depth not always provided).
			vr::SharedTextureHandle_t hTexture, hDepthTexture;

			// Valid region of provided texture (and depth).
			vr::VRTextureBounds_t bounds;

			// Projection matrix used to render the depth buffer.
			vr::HmdMatrix44_t mProjection;
		};
		virtual void SubmitLayer( const SubmitLayerPerEye_t( &perEye )[ 2 ], const vr::HmdMatrix34_t *pPose ) {}

		/** Submits queued layers for display. */
		virtual void Present( vr::SharedTextureHandle_t syncTexture ) {}

		/** Called after Present to allow driver to take more time until vsync after they've successfully acquired the sync texture in Present.*/
		virtual void PostPresent() {}

		/** Called to get additional frame timing stats from driver.  Check m_nSize for versioning (new members will be added to end only). */
		virtual void GetFrameTiming( DriverDirectMode_FrameTiming *pFrameTiming ) {}
	};

	static const char *IVRDriverDirectModeComponent_Version = "IVRDriverDirectModeComponent_005";

}

// ivrcameracomponent.h
namespace vr
{
	//-----------------------------------------------------------------------------
	//-----------------------------------------------------------------------------
	class ICameraVideoSinkCallback
	{
	public:
		virtual void OnCameraVideoSinkCallback() = 0;
	};

	// ----------------------------------------------------------------------------------------------
	// Purpose: The camera on a single tracked device
	// ----------------------------------------------------------------------------------------------
	class IVRCameraComponent
	{
	public:
		// ------------------------------------
		// Camera Methods
		// ------------------------------------
		virtual bool GetCameraFrameDimensions( vr::ECameraVideoStreamFormat nVideoStreamFormat, uint32_t *pWidth, uint32_t *pHeight ) = 0;
		virtual bool GetCameraFrameBufferingRequirements( int *pDefaultFrameQueueSize, uint32_t *pFrameBufferDataSize ) = 0;
		virtual bool SetCameraFrameBuffering( int nFrameBufferCount, void **ppFrameBuffers, uint32_t nFrameBufferDataSize ) = 0;
		virtual bool SetCameraVideoStreamFormat( vr::ECameraVideoStreamFormat nVideoStreamFormat ) = 0;
		virtual vr::ECameraVideoStreamFormat GetCameraVideoStreamFormat() = 0;
		virtual bool StartVideoStream() = 0;
		virtual void StopVideoStream() = 0;
		virtual bool IsVideoStreamActive( bool *pbPaused, float *pflElapsedTime ) = 0;
		virtual const vr::CameraVideoStreamFrame_t *GetVideoStreamFrame() = 0;
		virtual void ReleaseVideoStreamFrame( const vr::CameraVideoStreamFrame_t *pFrameImage ) = 0;
		virtual bool SetAutoExposure( bool bEnable ) = 0;
		virtual bool PauseVideoStream() = 0;
		virtual bool ResumeVideoStream() = 0;
		virtual bool GetCameraDistortion( float flInputU, float flInputV, float *pflOutputU, float *pflOutputV ) = 0;
		virtual bool GetCameraProjection( vr::EVRTrackedCameraFrameType eFrameType, float flZNear, float flZFar, vr::HmdMatrix44_t *pProjection ) = 0;
		virtual bool SetFrameRate( int nISPFrameRate, int nSensorFrameRate ) = 0;
		virtual bool SetCameraVideoSinkCallback( vr::ICameraVideoSinkCallback *pCameraVideoSinkCallback ) = 0;
		virtual bool GetCameraCompatibilityMode( vr::ECameraCompatibilityMode *pCameraCompatibilityMode ) = 0;
		virtual bool SetCameraCompatibilityMode( vr::ECameraCompatibilityMode nCameraCompatibilityMode ) = 0;
		virtual bool GetCameraFrameBounds( vr::EVRTrackedCameraFrameType eFrameType, uint32_t *pLeft, uint32_t *pTop, uint32_t *pWidth, uint32_t *pHeight ) = 0;
		virtual bool GetCameraIntrinsics( vr::EVRTrackedCameraFrameType eFrameType, HmdVector2_t *pFocalLength, HmdVector2_t *pCenter ) = 0;
	};

	static const char *IVRCameraComponent_Version = "IVRCameraComponent_002";
}
// itrackeddevicedriverprovider.h
namespace vr
{

class ITrackedDeviceServerDriver;
struct TrackedDeviceDriverInfo_t;
struct DriverPose_t;

/** This interface is provided by vrserver to allow the driver to notify 
* the system when something changes about a device. These changes must
* not change the serial number or class of the device because those values
* are permanently associated with the device's index. */
class IVRDriverContext
{
public:
	/** Returns the requested interface. If the interface was not available it will return NULL and fill
	* out the error. */
	virtual void *GetGenericInterface( const char *pchInterfaceVersion, EVRInitError *peError = nullptr ) = 0;

	/** Returns the property container handle for this driver */
	virtual DriverHandle_t GetDriverHandle() = 0;
};


/** This interface must be implemented in each driver. It will be loaded in vrserver.exe */
class IServerTrackedDeviceProvider
{
public:
	/** initializes the driver. This will be called before any other methods are called.
	* If Init returns anything other than VRInitError_None the driver DLL will be unloaded.
	*
	* pDriverHost will never be NULL, and will always be a pointer to a IServerDriverHost interface
	*
	* pchUserDriverConfigDir - The absolute path of the directory where the driver should store user
	*	config files.
	* pchDriverInstallDir - The absolute path of the root directory for the driver.
	*/
	virtual EVRInitError Init( IVRDriverContext *pDriverContext ) = 0;

	/** cleans up the driver right before it is unloaded */
	virtual void Cleanup() = 0;

	/** Returns the version of the ITrackedDeviceServerDriver interface used by this driver */
	virtual const char * const *GetInterfaceVersions() = 0;

	/** Allows the driver do to some work in the main loop of the server. */
	virtual void RunFrame() = 0;


	// ------------  Power State Functions ----------------------- //

	/** Returns true if the driver wants to block Standby mode. */
	virtual bool ShouldBlockStandbyMode() = 0;

	/** Called when the system is entering Standby mode. The driver should switch itself into whatever sort of low-power
	* state it has. */
	virtual void EnterStandby() = 0;

	/** Called when the system is leaving Standby mode. The driver should switch itself back to
	full operation. */
	virtual void LeaveStandby() = 0;

};


static const char *IServerTrackedDeviceProvider_Version = "IServerTrackedDeviceProvider_004";




/** This interface must be implemented in each driver. It will be loaded in vrclient.dll */
class IVRWatchdogProvider
{
public:
	/** initializes the driver in watchdog mode. */
	virtual EVRInitError Init( IVRDriverContext *pDriverContext ) = 0;

	/** cleans up the driver right before it is unloaded */
	virtual void Cleanup() = 0;
};

static const char *IVRWatchdogProvider_Version = "IVRWatchdogProvider_001";

}
// ivrproperties.h
#include <string>
#include <vector>

namespace vr
{

	enum EPropertyWriteType
	{
		PropertyWrite_Set = 0,
		PropertyWrite_Erase = 1,
		PropertyWrite_SetError = 2
	};

	struct PropertyWrite_t
	{
		ETrackedDeviceProperty prop;
		EPropertyWriteType writeType;
		ETrackedPropertyError eSetError;
		void *pvBuffer;
		uint32_t unBufferSize;
		PropertyTypeTag_t unTag;
		ETrackedPropertyError eError;
	};

	struct PropertyRead_t
	{
		ETrackedDeviceProperty prop;
		void *pvBuffer;
		uint32_t unBufferSize;
		PropertyTypeTag_t unTag;
		uint32_t unRequiredBufferSize;
		ETrackedPropertyError eError;
	};


class IVRProperties
{
public:

	/** Reads a set of properties atomically. See the PropertyReadBatch_t struct for more information. */
	virtual ETrackedPropertyError ReadPropertyBatch( PropertyContainerHandle_t ulContainerHandle, PropertyRead_t *pBatch, uint32_t unBatchEntryCount ) = 0;

	/** Writes a set of properties atomically. See the PropertyWriteBatch_t struct for more information. */
	virtual ETrackedPropertyError WritePropertyBatch( PropertyContainerHandle_t ulContainerHandle, PropertyWrite_t *pBatch, uint32_t unBatchEntryCount ) = 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;

	/** Returns a container handle given a tracked device index */
	virtual PropertyContainerHandle_t TrackedDeviceToPropertyContainer( TrackedDeviceIndex_t nDevice ) = 0;

};

static const char * const IVRProperties_Version = "IVRProperties_001";

class CVRPropertyHelpers
{
public:
	CVRPropertyHelpers( IVRProperties * pProperties ) : m_pProperties( pProperties ) {}

	/** Returns a scaler property. If the device index is not valid or the property value type does not match,
	* this function will return false. */
	bool GetBoolProperty( PropertyContainerHandle_t ulContainerHandle, ETrackedDeviceProperty prop, ETrackedPropertyError *pError = 0L );
	float GetFloatProperty( PropertyContainerHandle_t ulContainerHandle, ETrackedDeviceProperty prop, ETrackedPropertyError *pError = 0L );
	int32_t GetInt32Property( PropertyContainerHandle_t ulContainerHandle, ETrackedDeviceProperty prop, ETrackedPropertyError *pError = 0L );
	uint64_t GetUint64Property( PropertyContainerHandle_t ulContainerHandle, ETrackedDeviceProperty prop, ETrackedPropertyError *pError = 0L );

	/** Returns a single typed 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. */
	uint32_t GetProperty( PropertyContainerHandle_t ulContainerHandle, ETrackedDeviceProperty prop, VR_OUT_STRING() void *pvBuffer, uint32_t unBufferSize, PropertyTypeTag_t *punTag, ETrackedPropertyError *pError = 0L );


	/** 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. */
	uint32_t GetStringProperty( PropertyContainerHandle_t ulContainerHandle, ETrackedDeviceProperty prop, VR_OUT_STRING() char *pchValue, uint32_t unBufferSize, ETrackedPropertyError *pError = 0L );

	/** Returns a string property as a std::string. If the device index is not valid or the property is not a string type this function will
	* return an empty string. */
	std::string GetStringProperty( vr::PropertyContainerHandle_t ulContainer, vr::ETrackedDeviceProperty prop, vr::ETrackedPropertyError *peError = nullptr );

	/** Reads a std::vector of data from a property. */
	template< typename T>
	ETrackedPropertyError GetPropertyVector( PropertyContainerHandle_t ulContainer, ETrackedDeviceProperty prop, PropertyTypeTag_t unExpectedTag, std::vector<T> *pvecResults );

	/** Sets a scaler property. The new value will be returned on any subsequent call to get this property in any process. */
	ETrackedPropertyError SetBoolProperty( PropertyContainerHandle_t ulContainerHandle, ETrackedDeviceProperty prop, bool bNewValue );
	ETrackedPropertyError SetFloatProperty( PropertyContainerHandle_t ulContainerHandle, ETrackedDeviceProperty prop, float fNewValue );
	ETrackedPropertyError SetInt32Property( PropertyContainerHandle_t ulContainerHandle, ETrackedDeviceProperty prop, int32_t nNewValue );
	ETrackedPropertyError SetUint64Property( PropertyContainerHandle_t ulContainerHandle, ETrackedDeviceProperty prop, uint64_t ulNewValue );

	/** Sets a string property. The new value will be returned on any subsequent call to get this property in any process. */
	ETrackedPropertyError SetStringProperty( PropertyContainerHandle_t ulContainerHandle, ETrackedDeviceProperty prop, const char *pchNewValue );

	/** Sets a single typed property. The new value will be returned on any subsequent call to get this property in any process. */
	ETrackedPropertyError SetProperty( PropertyContainerHandle_t ulContainerHandle, ETrackedDeviceProperty prop, void *pvNewValue, uint32_t unNewValueSize, PropertyTypeTag_t unTag );

	/** Sets the error return value for a property. This value will be returned on all subsequent requests to get the property */
	ETrackedPropertyError SetPropertyError( PropertyContainerHandle_t ulContainerHandle, ETrackedDeviceProperty prop, ETrackedPropertyError eError );

	/** Clears any value or error set for the property. */
	ETrackedPropertyError EraseProperty( PropertyContainerHandle_t ulContainerHandle, ETrackedDeviceProperty prop );

	/* Turns a device index into a property container handle. */
	PropertyContainerHandle_t TrackedDeviceToPropertyContainer( TrackedDeviceIndex_t nDevice ) { return m_pProperties->TrackedDeviceToPropertyContainer( nDevice );  }

	/** Sets a std::vector of typed data to a property. */
	template< typename T>
	ETrackedPropertyError SetPropertyVector( PropertyContainerHandle_t ulContainer, ETrackedDeviceProperty prop, PropertyTypeTag_t unExpectedTag, std::vector<T> *vecProperties );

	/** Returns true if the specified property is set on the specified container */
	bool IsPropertySet( PropertyContainerHandle_t ulContainer, ETrackedDeviceProperty prop, ETrackedPropertyError *peError = nullptr );
private:
	template<typename T>
	T GetPropertyHelper( PropertyContainerHandle_t ulContainerHandle, ETrackedDeviceProperty prop, ETrackedPropertyError *pError, T bDefault, PropertyTypeTag_t unTypeTag );

	IVRProperties *m_pProperties;
};


inline uint32_t CVRPropertyHelpers::GetProperty( PropertyContainerHandle_t ulContainerHandle, ETrackedDeviceProperty prop, VR_OUT_STRING() void *pvBuffer, uint32_t unBufferSize, PropertyTypeTag_t *punTag, ETrackedPropertyError *pError )
{
	PropertyRead_t batch;
	batch.prop = prop;
	batch.pvBuffer = pvBuffer;
	batch.unBufferSize = unBufferSize;

	m_pProperties->ReadPropertyBatch( ulContainerHandle, &batch, 1 );

	if ( pError )
	{
		*pError = batch.eError;
	}

	if ( punTag )
	{
		*punTag = batch.unTag;
	}

	return batch.unRequiredBufferSize;
}


/** Sets a single typed property. The new value will be returned on any subsequent call to get this property in any process. */
inline ETrackedPropertyError CVRPropertyHelpers::SetProperty( PropertyContainerHandle_t ulContainerHandle, ETrackedDeviceProperty prop, void *pvNewValue, uint32_t unNewValueSize, PropertyTypeTag_t unTag )
{
	PropertyWrite_t batch;
	batch.writeType = PropertyWrite_Set;
	batch.prop = prop;
	batch.pvBuffer = pvNewValue;
	batch.unBufferSize = unNewValueSize;
	batch.unTag = unTag;

	m_pProperties->WritePropertyBatch( ulContainerHandle, &batch, 1 );

	return batch.eError;
}


/** 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. */
inline uint32_t CVRPropertyHelpers::GetStringProperty( PropertyContainerHandle_t ulContainerHandle, ETrackedDeviceProperty prop, VR_OUT_STRING() char *pchValue, uint32_t unBufferSize, ETrackedPropertyError *pError )
{
	PropertyTypeTag_t unTag;
	ETrackedPropertyError error;
	uint32_t unRequiredSize = GetProperty( ulContainerHandle, prop, pchValue, unBufferSize, &unTag, &error );
	if ( unTag != k_unStringPropertyTag && error == TrackedProp_Success )
	{
		error = TrackedProp_WrongDataType;
	}

	if ( pError )
	{
		*pError = error;
	}

	if ( error != TrackedProp_Success )
	{
		if ( pchValue && unBufferSize )
		{
			*pchValue = '\0';
		}
	}

	return unRequiredSize;
}


/** Returns a string property as a std::string. If the device index is not valid or the property is not a string type this function will
* return an empty string. */
inline std::string CVRPropertyHelpers::GetStringProperty( vr::PropertyContainerHandle_t ulContainer, vr::ETrackedDeviceProperty prop, vr::ETrackedPropertyError *peError )
{
	char buf[1024];
	vr::ETrackedPropertyError err;
	uint32_t unRequiredBufferLen = GetStringProperty( ulContainer, prop, buf, sizeof(buf), &err );

	std::string sResult;

	if ( err == TrackedProp_Success )
	{
		sResult = buf;
	}
	else if ( err == TrackedProp_BufferTooSmall )
	{
		char *pchBuffer = new char[unRequiredBufferLen];
		unRequiredBufferLen = GetStringProperty( ulContainer, prop, pchBuffer, unRequiredBufferLen, &err );
		sResult = pchBuffer;
		delete[] pchBuffer;
	}

	if ( peError )
	{
		*peError = err;
	}

	return sResult;
}


/** Sets a string property. The new value will be returned on any subsequent call to get this property in any process. */
inline ETrackedPropertyError CVRPropertyHelpers::SetStringProperty( PropertyContainerHandle_t ulContainerHandle, ETrackedDeviceProperty prop, const char *pchNewValue )
{
	if ( !pchNewValue )
		return TrackedProp_InvalidOperation;

	// this is strlen without the dependency on string.h
	const char *pchCurr = pchNewValue;
	while ( *pchCurr )
	{
		pchCurr++;
	}

	return SetProperty( ulContainerHandle, prop, (void *)pchNewValue, (uint32_t)(pchCurr - pchNewValue) + 1, k_unStringPropertyTag );
}


template<typename T>
inline T CVRPropertyHelpers::GetPropertyHelper( PropertyContainerHandle_t ulContainerHandle, ETrackedDeviceProperty prop, ETrackedPropertyError *pError, T bDefault, PropertyTypeTag_t unTypeTag )
{
	T bValue;
	ETrackedPropertyError eError;
	PropertyTypeTag_t unReadTag;
	GetProperty( ulContainerHandle, prop, &bValue, sizeof( bValue ), &unReadTag, &eError );
	if ( unReadTag != unTypeTag && eError == TrackedProp_Success )
	{
		eError = TrackedProp_WrongDataType;
	};

	if ( pError )
		*pError = eError;
	if ( eError != TrackedProp_Success )
	{
		return bDefault;
	}
	else
	{
		return bValue;
	}
}


inline bool CVRPropertyHelpers::GetBoolProperty( PropertyContainerHandle_t ulContainerHandle, ETrackedDeviceProperty prop, ETrackedPropertyError *pError )
{
	return GetPropertyHelper<bool>( ulContainerHandle, prop, pError, false, k_unBoolPropertyTag );
}


inline float CVRPropertyHelpers::GetFloatProperty( PropertyContainerHandle_t ulContainerHandle, ETrackedDeviceProperty prop, ETrackedPropertyError *pError )
{
	return GetPropertyHelper<float>( ulContainerHandle, prop, pError, 0.f, k_unFloatPropertyTag );
}

inline int32_t CVRPropertyHelpers::GetInt32Property( PropertyContainerHandle_t ulContainerHandle, ETrackedDeviceProperty prop, ETrackedPropertyError *pError )
{
	return GetPropertyHelper<int32_t>( ulContainerHandle, prop, pError, 0, k_unInt32PropertyTag );
}

inline uint64_t CVRPropertyHelpers::GetUint64Property( PropertyContainerHandle_t ulContainerHandle, ETrackedDeviceProperty prop, ETrackedPropertyError *pError )
{
	return GetPropertyHelper<uint64_t>( ulContainerHandle, prop, pError, 0, k_unUint64PropertyTag );
}

inline ETrackedPropertyError CVRPropertyHelpers::SetBoolProperty( PropertyContainerHandle_t ulContainerHandle, ETrackedDeviceProperty prop, bool bNewValue )
{
	return SetProperty( ulContainerHandle, prop, &bNewValue, sizeof( bNewValue ), k_unBoolPropertyTag );
}

inline ETrackedPropertyError CVRPropertyHelpers::SetFloatProperty( PropertyContainerHandle_t ulContainerHandle, ETrackedDeviceProperty prop, float fNewValue )
{
	return SetProperty( ulContainerHandle, prop, &fNewValue, sizeof( fNewValue ), k_unFloatPropertyTag );
}

inline ETrackedPropertyError CVRPropertyHelpers::SetInt32Property( PropertyContainerHandle_t ulContainerHandle, ETrackedDeviceProperty prop, int32_t nNewValue )
{
	return SetProperty( ulContainerHandle, prop, &nNewValue, sizeof( nNewValue ), k_unInt32PropertyTag );
}

inline ETrackedPropertyError CVRPropertyHelpers::SetUint64Property( PropertyContainerHandle_t ulContainerHandle, ETrackedDeviceProperty prop, uint64_t ulNewValue )
{
	return SetProperty( ulContainerHandle, prop, &ulNewValue, sizeof( ulNewValue ), k_unUint64PropertyTag );
}

/** Sets the error return value for a property. This value will be returned on all subsequent requests to get the property */
inline ETrackedPropertyError CVRPropertyHelpers::SetPropertyError( PropertyContainerHandle_t ulContainerHandle, ETrackedDeviceProperty prop, ETrackedPropertyError eError )
{
	PropertyWrite_t batch;
	batch.writeType = PropertyWrite_SetError;
	batch.prop = prop;
	batch.eSetError = eError;

	m_pProperties->WritePropertyBatch( ulContainerHandle, &batch, 1 );

	return batch.eError;
}

/** Clears any value or error set for the property. */
inline ETrackedPropertyError CVRPropertyHelpers::EraseProperty( PropertyContainerHandle_t ulContainerHandle, ETrackedDeviceProperty prop )
{
	PropertyWrite_t batch;
	batch.writeType = PropertyWrite_Erase;
	batch.prop = prop;

	m_pProperties->WritePropertyBatch( ulContainerHandle, &batch, 1 );

	return batch.eError;

}

template< typename T >
ETrackedPropertyError CVRPropertyHelpers::SetPropertyVector(PropertyContainerHandle_t ulContainer, vr::ETrackedDeviceProperty prop, PropertyTypeTag_t unTag, std::vector<T> *pvecProperties)
{
	return SetProperty( ulContainer, prop, &(*pvecProperties)[0], (uint32_t)(pvecProperties->size() * sizeof( T )), unTag );
}

template< typename T >
ETrackedPropertyError CVRPropertyHelpers::GetPropertyVector( PropertyContainerHandle_t ulContainer, ETrackedDeviceProperty prop, PropertyTypeTag_t unExpectedTag, std::vector<T> *pvecResults )
{
	ETrackedPropertyError err;
	PropertyTypeTag_t unTag;
	uint32_t unNeeded;
	if ( pvecResults->empty() )
		unNeeded = GetProperty( ulContainer, prop, nullptr, 0, &unTag, &err );
	else
		unNeeded = GetProperty( ulContainer, prop, &(*pvecResults)[0], (uint32_t)(pvecResults->size() * sizeof( T )), &unTag, &err );
	uint32_t unFound = unNeeded / sizeof( T );
	if ( err == TrackedProp_Success )
	{
		if ( unTag != unExpectedTag && unFound > 0 )
		{
			return TrackedProp_WrongDataType;
		}

		pvecResults->resize( unFound );
		return TrackedProp_Success;
	}
	else if ( err == TrackedProp_BufferTooSmall )
	{
		pvecResults->resize( unFound );
		unNeeded = GetProperty( ulContainer, prop, &(*pvecResults)[0], (uint32_t)(pvecResults->size() * sizeof( T )), &unTag, &err );
		unFound = unNeeded / sizeof( T );

		if ( err == TrackedProp_Success )
		{
			if ( unTag != unExpectedTag )
			{
				return TrackedProp_WrongDataType;
			}

			pvecResults->resize( unFound );
			return TrackedProp_Success;
		}
	}
	return err;
}

inline bool CVRPropertyHelpers::IsPropertySet( PropertyContainerHandle_t ulContainer, ETrackedDeviceProperty prop, ETrackedPropertyError *peError )
{
	ETrackedPropertyError error;
	GetProperty( ulContainer, prop, nullptr, 0, nullptr, &error );
	if ( peError )
		*peError = error;
	return error == TrackedProp_Success || error == TrackedProp_BufferTooSmall;
}

}



// ivrdriverinput.h
namespace vr
{

	typedef uint64_t VRInputComponentHandle_t;
	static const VRInputComponentHandle_t k_ulInvalidInputComponentHandle = 0;

	enum EVRScalarType
	{
		VRScalarType_Absolute = 0,
		VRScalarType_Relative = 1,
	};


	enum EVRScalarUnits
	{
		VRScalarUnits_NormalizedOneSided = 0, // Value ranges from 0 to 1
		VRScalarUnits_NormalizedTwoSided = 1, // Value ranges from -1 to 1
	};

	class IVRDriverInput
	{
	public:

		/** Creates a boolean input component for the device */
		virtual EVRInputError CreateBooleanComponent( PropertyContainerHandle_t ulContainer, const char *pchName, VRInputComponentHandle_t *pHandle ) = 0;

		/** Updates a boolean component */
		virtual EVRInputError UpdateBooleanComponent( VRInputComponentHandle_t ulComponent, bool bNewValue, double fTimeOffset ) = 0;

		/** Creates a scalar input component for the device */
		virtual EVRInputError CreateScalarComponent( PropertyContainerHandle_t ulContainer, const char *pchName, VRInputComponentHandle_t *pHandle, EVRScalarType eType, EVRScalarUnits eUnits ) = 0;

		/** Updates a boolean component */
		virtual EVRInputError UpdateScalarComponent( VRInputComponentHandle_t ulComponent, float fNewValue, double fTimeOffset ) = 0;

		/** Creates a haptic component for the device */
		virtual EVRInputError CreateHapticComponent( PropertyContainerHandle_t ulContainer, const char *pchName, VRInputComponentHandle_t *pHandle ) = 0;

	};

	static const char * const IVRDriverInput_Version = "IVRDriverInput_001";

} // namespace vr

// ivrdriverlog.h
namespace vr
{

class IVRDriverLog
{
public:
	/** Writes a log message to the log file prefixed with the driver name */
	virtual void Log( const char *pchLogMessage ) = 0;
};


static const char *IVRDriverLog_Version = "IVRDriverLog_001";

}
// ivrserverdriverhost.h
namespace vr
{

class ITrackedDeviceServerDriver;
struct TrackedDeviceDriverInfo_t;
struct DriverPose_t;

/** This interface is provided by vrserver to allow the driver to notify 
* the system when something changes about a device. These changes must
* not change the serial number or class of the device because those values
* are permanently associated with the device's index. */
class IVRServerDriverHost
{
public:
	/** Notifies the server that a tracked device has been added. If this function returns true
	* the server will call Activate on the device. If it returns false some kind of error
	* has occurred and the device will not be activated. */
	virtual bool TrackedDeviceAdded( const char *pchDeviceSerialNumber, ETrackedDeviceClass eDeviceClass, ITrackedDeviceServerDriver *pDriver ) = 0;

	/** Notifies the server that a tracked device's pose has been updated */
	virtual void TrackedDevicePoseUpdated( uint32_t unWhichDevice, const DriverPose_t & newPose, uint32_t unPoseStructSize ) = 0;

	/** Notifies the server that vsync has occurred on the the display attached to the device. This is
	* only permitted on devices of the HMD class. */
	virtual void VsyncEvent( double vsyncTimeOffsetSeconds ) = 0;

	/** Sends a vendor specific event (VREvent_VendorSpecific_Reserved_Start..VREvent_VendorSpecific_Reserved_End */
	virtual void VendorSpecificEvent( uint32_t unWhichDevice, vr::EVREventType eventType, const VREvent_Data_t & eventData, double eventTimeOffset ) = 0;

	/** Returns true if SteamVR is exiting */
	virtual bool IsExiting() = 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. uncbVREvent should be the size in bytes of the VREvent_t struct */
	virtual bool PollNextEvent( VREvent_t *pEvent, uint32_t uncbVREvent ) = 0;

	/** Provides access to device poses for drivers.  Poses are in their "raw" tracking space which is uniquely
	* defined by each driver providing poses for its devices.  It is up to clients of this function to correlate
	* poses across different drivers.  Poses are indexed by their device id, and their associated driver and
	* other properties can be looked up via IVRProperties. */
	virtual void GetRawTrackedDevicePoses( float fPredictedSecondsFromNow, TrackedDevicePose_t *pTrackedDevicePoseArray, uint32_t unTrackedDevicePoseArrayCount ) = 0;

	/** Notifies the server that a tracked device's display component transforms have been updated. */
	virtual void TrackedDeviceDisplayTransformUpdated( uint32_t unWhichDevice, HmdMatrix34_t eyeToHeadLeft, HmdMatrix34_t eyeToHeadRight ) = 0;
};

static const char *IVRServerDriverHost_Version = "IVRServerDriverHost_005";

}

// ivrhiddenarea.h
namespace vr
{

class CVRHiddenAreaHelpers
{
public:
	CVRHiddenAreaHelpers( IVRProperties *pProperties ) : m_pProperties( pProperties ) {}

	/** Stores a hidden area mesh in a property */
	ETrackedPropertyError SetHiddenArea( EVREye eEye, EHiddenAreaMeshType type, HmdVector2_t *pVerts, uint32_t unVertCount );

	/** retrieves a hidden area mesh from a property. Returns the vert count read out of the property.  */
	uint32_t GetHiddenArea( EVREye eEye, EHiddenAreaMeshType type, HmdVector2_t *pVerts, uint32_t unVertCount, ETrackedPropertyError *peError );

private:
	ETrackedDeviceProperty GetPropertyEnum( EVREye eEye, EHiddenAreaMeshType type )
	{
		return (ETrackedDeviceProperty)(Prop_DisplayHiddenArea_Binary_Start + ((int)type * 2) + (int)eEye);
	}

	IVRProperties *m_pProperties;
};


inline ETrackedPropertyError CVRHiddenAreaHelpers::SetHiddenArea( EVREye eEye, EHiddenAreaMeshType type, HmdVector2_t *pVerts, uint32_t unVertCount )
{
	ETrackedDeviceProperty prop = GetPropertyEnum( eEye, type );
	CVRPropertyHelpers propHelpers( m_pProperties );
	return propHelpers.SetProperty( propHelpers.TrackedDeviceToPropertyContainer( k_unTrackedDeviceIndex_Hmd ), prop, pVerts, sizeof( HmdVector2_t ) * unVertCount, k_unHiddenAreaPropertyTag );
}


inline uint32_t CVRHiddenAreaHelpers::GetHiddenArea( EVREye eEye, EHiddenAreaMeshType type, HmdVector2_t *pVerts, uint32_t unVertCount, ETrackedPropertyError *peError )
{
	ETrackedDeviceProperty prop = GetPropertyEnum( eEye, type );
	CVRPropertyHelpers propHelpers( m_pProperties );
	ETrackedPropertyError propError;
	PropertyTypeTag_t unTag;
	uint32_t unBytesNeeded = propHelpers.GetProperty( propHelpers.TrackedDeviceToPropertyContainer( k_unTrackedDeviceIndex_Hmd ), prop, pVerts, sizeof( HmdVector2_t )*unVertCount, &unTag, &propError );
	if ( propError == TrackedProp_Success && unTag != k_unHiddenAreaPropertyTag )
	{
		propError = TrackedProp_WrongDataType;
		unBytesNeeded = 0;
	}

	if ( peError )
	{
		*peError = propError;
	}

	return unBytesNeeded / sizeof( HmdVector2_t );
}

}
// ivrwatchdoghost.h
namespace vr
{

/** This interface is provided by vrclient to allow the driver to make everything wake up */
class IVRWatchdogHost
{
public:
	/** Client drivers in watchdog mode should call this when they have received a signal from hardware that should
	* cause SteamVR to start */
	virtual void WatchdogWakeUp() = 0;
};

static const char *IVRWatchdogHost_Version = "IVRWatchdogHost_001";

}



// ivrvirtualdisplay.h
namespace vr
{
	struct PresentInfo_t
	{
		SharedTextureHandle_t backbufferTextureHandle;
		EVSync vsync;
		uint64_t nFrameId;
		double flVSyncTimeInSeconds;
	};

	// ----------------------------------------------------------------------------------------------
	// Purpose: This component is used for drivers that implement a virtual display (e.g. wireless).
	// ----------------------------------------------------------------------------------------------
	class IVRVirtualDisplay
	{
	public:

		/** Submits final backbuffer for display. */
		virtual void Present( const PresentInfo_t *pPresentInfo, uint32_t unPresentInfoSize ) = 0;

		/** Block until the last presented buffer start scanning out. */
		virtual void WaitForPresent() = 0;

		/** Provides timing data for synchronizing with display. */
		virtual bool GetTimeSinceLastVsync( float *pfSecondsSinceLastVsync, uint64_t *pulFrameCounter ) = 0;
	};

	static const char *IVRVirtualDisplay_Version = "IVRVirtualDisplay_002";

	/** Returns the current IVRVirtualDisplay pointer or NULL the interface could not be found. */
	VR_INTERFACE vr::IVRVirtualDisplay *VR_CALLTYPE VRVirtualDisplay();
}


// 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;
};

static const char * const IVRDriverManager_Version = "IVRDriverManager_001";

} // namespace vr





namespace vr
{
	static const char * const k_InterfaceVersions[] =
	{
		IVRSettings_Version,
		ITrackedDeviceServerDriver_Version,
		IVRDisplayComponent_Version,
		IVRDriverDirectModeComponent_Version,
		IVRCameraComponent_Version,
		IServerTrackedDeviceProvider_Version,
		IVRWatchdogProvider_Version,
		IVRVirtualDisplay_Version,
		IVRDriverManager_Version,
		IVRResources_Version,
		nullptr
	};

	inline IVRDriverContext *&VRDriverContext()
	{
		static IVRDriverContext *pHost;
		return pHost;
	}

	class COpenVRDriverContext
	{
	public:
		COpenVRDriverContext() : m_propertyHelpers(nullptr), m_hiddenAreaHelpers(nullptr) { Clear(); }
		void Clear();

		EVRInitError InitServer();
		EVRInitError InitWatchdog();

		IVRSettings *VRSettings()
		{
			if ( m_pVRSettings == nullptr )
			{
				EVRInitError eError;
				m_pVRSettings = (IVRSettings *)VRDriverContext()->GetGenericInterface( IVRSettings_Version, &eError );
			}
			return m_pVRSettings;
		}

		IVRProperties *VRPropertiesRaw()
		{
			if ( m_pVRProperties == nullptr )
			{
				EVRInitError eError;
				m_pVRProperties = (IVRProperties *)VRDriverContext()->GetGenericInterface( IVRProperties_Version, &eError );
				m_propertyHelpers = CVRPropertyHelpers( m_pVRProperties );
				m_hiddenAreaHelpers = CVRHiddenAreaHelpers( m_pVRProperties );
			}
			return m_pVRProperties;
		}

		CVRPropertyHelpers *VRProperties()
		{
			VRPropertiesRaw();
			return &m_propertyHelpers;
		}

		CVRHiddenAreaHelpers *VRHiddenArea()
		{
			VRPropertiesRaw();
			return &m_hiddenAreaHelpers;
		}

		IVRServerDriverHost *VRServerDriverHost()
		{
			if ( m_pVRServerDriverHost == nullptr )
			{
				EVRInitError eError;
				m_pVRServerDriverHost = (IVRServerDriverHost *)VRDriverContext()->GetGenericInterface( IVRServerDriverHost_Version, &eError );
			}
			return m_pVRServerDriverHost;
		}

		IVRWatchdogHost *VRWatchdogHost()
		{
			if ( m_pVRWatchdogHost == nullptr )
			{
				EVRInitError eError;
				m_pVRWatchdogHost = (IVRWatchdogHost *)VRDriverContext()->GetGenericInterface( IVRWatchdogHost_Version, &eError );
			}
			return m_pVRWatchdogHost;
		}

		IVRDriverLog *VRDriverLog()
		{
			if ( m_pVRDriverLog == nullptr )
			{
				EVRInitError eError;
				m_pVRDriverLog = (IVRDriverLog *)VRDriverContext()->GetGenericInterface( IVRDriverLog_Version, &eError );
			}
			return m_pVRDriverLog;
		}

		DriverHandle_t VR_CALLTYPE VRDriverHandle()
		{
			return VRDriverContext()->GetDriverHandle();
		}

		IVRDriverManager *VRDriverManager()
		{
			if ( !m_pVRDriverManager )
			{
				EVRInitError eError;
				m_pVRDriverManager = (IVRDriverManager *)VRDriverContext()->GetGenericInterface( IVRDriverManager_Version, &eError );
			}
			return m_pVRDriverManager;
		}

		IVRResources *VRResources()
		{
			if ( !m_pVRResources )
			{
				EVRInitError eError;
				m_pVRResources = (IVRResources *)VRDriverContext()->GetGenericInterface( IVRResources_Version, &eError );
			}
			return m_pVRResources;
		}

		IVRDriverInput *VRDriverInput()
		{
			if ( !m_pVRDriverInput )
			{
				EVRInitError eError;
				m_pVRDriverInput = (IVRDriverInput *)VRDriverContext()->GetGenericInterface( IVRDriverInput_Version, &eError );
			}
			return m_pVRDriverInput;
		}

	private:
		CVRPropertyHelpers		m_propertyHelpers;
		CVRHiddenAreaHelpers	m_hiddenAreaHelpers;

		IVRSettings				*m_pVRSettings;
		IVRProperties			*m_pVRProperties;
		IVRServerDriverHost		*m_pVRServerDriverHost;
		IVRWatchdogHost			*m_pVRWatchdogHost;
		IVRDriverLog			*m_pVRDriverLog;
		IVRDriverManager		*m_pVRDriverManager;
		IVRResources			*m_pVRResources;
		IVRDriverInput			*m_pVRDriverInput;
	};

	inline COpenVRDriverContext &OpenVRInternal_ModuleServerDriverContext()
	{
		static void *ctx[sizeof( COpenVRDriverContext ) / sizeof( void * )];
		return *(COpenVRDriverContext *)ctx; // bypass zero-init constructor
	}

	inline IVRSettings *VR_CALLTYPE VRSettings() { return OpenVRInternal_ModuleServerDriverContext().VRSettings(); }
	inline IVRProperties *VR_CALLTYPE VRPropertiesRaw() { return OpenVRInternal_ModuleServerDriverContext().VRPropertiesRaw(); }
	inline CVRPropertyHelpers *VR_CALLTYPE VRProperties() { return OpenVRInternal_ModuleServerDriverContext().VRProperties(); }
	inline CVRHiddenAreaHelpers *VR_CALLTYPE VRHiddenArea() { return OpenVRInternal_ModuleServerDriverContext().VRHiddenArea(); }
	inline IVRDriverLog *VR_CALLTYPE VRDriverLog() { return OpenVRInternal_ModuleServerDriverContext().VRDriverLog(); }
	inline IVRServerDriverHost *VR_CALLTYPE VRServerDriverHost() { return OpenVRInternal_ModuleServerDriverContext().VRServerDriverHost(); }
	inline IVRWatchdogHost *VR_CALLTYPE VRWatchdogHost() { return OpenVRInternal_ModuleServerDriverContext().VRWatchdogHost(); }
	inline DriverHandle_t VR_CALLTYPE VRDriverHandle() { return OpenVRInternal_ModuleServerDriverContext().VRDriverHandle(); }
	inline IVRDriverManager *VR_CALLTYPE VRDriverManager() { return OpenVRInternal_ModuleServerDriverContext().VRDriverManager(); }
	inline IVRResources *VR_CALLTYPE VRResources() { return OpenVRInternal_ModuleServerDriverContext().VRResources(); }
	inline IVRDriverInput *VR_CALLTYPE VRDriverInput() { return OpenVRInternal_ModuleServerDriverContext().VRDriverInput(); }

	inline void COpenVRDriverContext::Clear()
	{
		m_pVRSettings = nullptr;
		m_pVRProperties = nullptr;
		m_pVRServerDriverHost = nullptr;
		m_pVRDriverLog = nullptr;
		m_pVRWatchdogHost = nullptr;
		m_pVRDriverManager = nullptr;
		m_pVRResources = nullptr;
		m_pVRDriverInput = nullptr;
	}

	inline EVRInitError COpenVRDriverContext::InitServer()
	{
		Clear();
		if ( !VRServerDriverHost()
			|| !VRSettings()
			|| !VRProperties()
			|| !VRDriverLog() 
			|| !VRDriverManager()
			|| !VRResources() )
			return VRInitError_Init_InterfaceNotFound;
		return VRInitError_None;
	}

	inline EVRInitError COpenVRDriverContext::InitWatchdog()
	{
		Clear();
		if ( !VRWatchdogHost()
			|| !VRSettings()
			|| !VRDriverLog() )
			return VRInitError_Init_InterfaceNotFound;
		return VRInitError_None;
	}

	inline EVRInitError InitServerDriverContext( IVRDriverContext *pContext )
	{
		VRDriverContext() = pContext;
		return OpenVRInternal_ModuleServerDriverContext().InitServer();
	}

	inline EVRInitError InitWatchdogDriverContext( IVRDriverContext *pContext )
	{
		VRDriverContext() = pContext;
		return OpenVRInternal_ModuleServerDriverContext().InitWatchdog();
	}

	inline void CleanupDriverContext()
	{
		VRDriverContext() = nullptr;
		OpenVRInternal_ModuleServerDriverContext().Clear();
	}

	#define VR_INIT_SERVER_DRIVER_CONTEXT( pContext ) \
			{ \
			vr::EVRInitError eError = vr::InitServerDriverContext( pContext ); \
			if( eError != vr::VRInitError_None ) \
				return eError; \
			}

	#define VR_CLEANUP_SERVER_DRIVER_CONTEXT() \
		vr::CleanupDriverContext();

	#define VR_INIT_WATCHDOG_DRIVER_CONTEXT( pContext ) \
			{ \
			vr::EVRInitError eError = vr::InitWatchdogDriverContext( pContext ); \
			if( eError != vr::VRInitError_None ) \
				return eError; \
			}

	#define VR_CLEANUP_WATCHDOG_DRIVER_CONTEXT() \
		vr::CleanupDriverContext();
}
// End

#endif // _OPENVR_DRIVER_API

