Remove VR hardware support.

This resolves #881

1 files changed, 0 insertions, 3352 deletions

diff --git a/gfx/vr/openvr/openvr.h b/gfx/vr/openvr/openvr.h
deleted file mode 100644
index deb3142fd..000000000
--- a/gfx/vr/openvr/openvr.h
+++ /dev/null
@@ -1,3352 +0,0 @@
-#pragma once
-
-// openvr.h
-//========= Copyright Valve Corporation ============//
-// Dynamically generated file. Do not modify this file directly.
-
-#ifndef _OPENVR_API
-#define _OPENVR_API
-
-#include <stdint.h>
-
-
-
-// vrtypes.h
-#ifndef _INCLUDE_VRTYPES_H
-#define _INCLUDE_VRTYPES_H 
-
-namespace vr
-{
-
-#if defined(__linux__) || defined(__APPLE__) 
-	// The 32-bit version of gcc has the alignment requirement for uint64 and double set to
-	// 4 meaning that even with #pragma pack(8) these types will only be four-byte aligned.
-	// The 64-bit version of gcc has the alignment requirement for these types set to
-	// 8 meaning that unless we use #pragma pack(4) our structures will get bigger.
-	// The 64-bit structure packing has to match the 32-bit structure packing for each platform.
-	#pragma pack( push, 4 )
-#else
-	#pragma pack( push, 8 )
-#endif
-
-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 going away from you
-// 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 EGraphicsAPIConvention
-{
-	API_DirectX = 0, // Normalized Z goes from 0 at the viewer to 1 at the far clip plane
-	API_OpenGL = 1,  // Normalized Z goes from 1 at the viewer to -1 at the far clip plane
-};
-
-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; // Native d3d texture pointer or GL texture id.
-	EGraphicsAPIConvention eType;
-	EColorSpace eColorSpace;
-};
-
-enum ETrackingResult
-{
-	TrackingResult_Uninitialized			= 1,
-
-	TrackingResult_Calibrating_InProgress	= 100,
-	TrackingResult_Calibrating_OutOfRange	= 101,
-
-	TrackingResult_Running_OK				= 200,
-	TrackingResult_Running_OutOfRange		= 201,
-};
-
-static const uint32_t k_unTrackingStringSize = 32;
-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 = 16;
-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_TrackingReference = 4,	// Camera and base stations that serve as tracking reference points
-
-	TrackedDeviceClass_Other = 1000,
-};
-
-
-/** 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
-};
-
-
-/** 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. You probably don't want this one.
-};
-
-
-/** 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
-{
-	// 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,
-
-	// 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,
-
-	// 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,
-
-	// Vendors are free to expose private debug data in this reserved region
-	Prop_VendorSpecific_Reserved_Start			= 10000,
-	Prop_VendorSpecific_Reserved_End			= 10999,
-};
-
-/** 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,
-	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.
-};
-
-/** 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 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,
-};
-
-
-/** 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_ButtonPress					= 200, // data is controller
-	VREvent_ButtonUnpress				= 201, // data is controller
-	VREvent_ButtonTouch					= 202, // data is controller
-	VREvent_ButtonUntouch				= 203, // data is controller
-
-	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_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_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,
-	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
-
-	// 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_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_StatusUpdate				= 900,
-
-	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_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_PerformanceTest_EnableCapture = 1600,
-	VREvent_PerformanceTest_DisableCapture = 1601,
-	VREvent_PerformanceTest_FidelityLevel = 1602,
-	
-	// 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 */
-enum EDeviceActivityLevel
-{
-	k_EDeviceActivityLevel_Unknown = -1,
-	k_EDeviceActivityLevel_Idle = 0,
-	k_EDeviceActivityLevel_UserInteraction = 1,
-	k_EDeviceActivityLevel_UserInteraction_Timeout = 2,
-	k_EDeviceActivityLevel_Standby = 3,
-};
-
-
-/** 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_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) 
-**/
-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;
-};
-
-
-/** 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;
-};
-
-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;
-};
-
-/** 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_Data_t;
-
-/** 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;
-};
-
-
-/** 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;
-};
-
-
-/** 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;
-
-
-/** 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 ];
-};
-
-
-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,
-};
-
-/** 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_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_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_VendorSpecific_UnableToConnectToOculusRuntime = 1000,
-
-	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 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;
-
-#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 ";" )
-
-// ivrsystem.h
-namespace vr
-{
-
-class IVRSystem
-{
-public:
-
-
-	// ------------------------------------
-	// Display Methods
-	// ------------------------------------
-
-	/** Suggested size for the intermediate render target that the distortion pulls from. */
-	virtual void GetRecommendedRenderTargetSize( uint32_t *pnWidth, uint32_t *pnHeight ) = 0;
-
-	/** The projection matrix for the specified eye */
-	virtual HmdMatrix44_t GetProjectionMatrix( EVREye eEye, float fNearZ, float fFarZ, EGraphicsAPIConvention eProjType ) = 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;
-
-	/** Returns the transform from eye space to the head space. Eye space is the per-eye flavor of head
-	* space that provides stereo disparity. Instead of Model * View * Projection the sequence is Model * View * Eye^-1 * Projection. 
-	* Normally View and Eye^-1 will be multiplied together and treated as View in your application. 
-	*/
-	virtual HmdMatrix34_t GetEyeToHeadTransform( EVREye eEye ) = 0;
-
-	/** Returns the number of elapsed seconds since the last recorded vsync event. This 
-	*	will come from a vsync timer event in the timer if possible or from the application-reported
-	*   time if that is not available. If no vsync times are available the function will 
-	*   return zero for vsync time and frame counter and return false from the method. */
-	virtual bool GetTimeSinceLastVsync( float *pfSecondsSinceLastVsync, uint64_t *pulFrameCounter ) = 0;
-
-	/** [D3D9 Only]
-	* Returns the adapter index that the user should pass into CreateDevice to set up D3D9 in such
-	* a way that it can go full screen exclusive on the HMD. Returns -1 if there was an error.
-	*/
-	virtual int32_t GetD3D9AdapterIndex() = 0;
-
-	/** [D3D10/11 Only]
-	* Returns the adapter index and output index that the user should pass into EnumAdapters and EnumOutputs 
-	* to create the device and swap chain in DX10 and DX11. If an error occurs both indices will be set to -1.
-	*/
-	virtual void GetDXGIOutputInfo( int32_t *pnAdapterIndex ) = 0;
-
-	// ------------------------------------
-	// Display Mode methods
-	// ------------------------------------
-
-	/** Use to determine if the headset display is part of the desktop (i.e. extended) or hidden (i.e. direct mode). */
-	virtual bool IsDisplayOnDesktop() = 0;
-
-	/** Set the display visibility (true = extended, false = direct mode).  Return value of true indicates that the change was successful. */
-	virtual bool SetDisplayVisibility( bool bIsVisibleOnDesktop ) = 0;
-
-	// ------------------------------------
-	// Tracking Methods
-	// ------------------------------------
-
-	/** The pose that the tracker thinks that the HMD will be in at the specified number of seconds into the 
-	* future. Pass 0 to get the state at the instant the method is called. Most of the time the application should
-	* calculate the time until the photons will be emitted from the display and pass that time into the method.
-	*
-	* This is roughly analogous to the inverse of the view matrix in most applications, though 
-	* many games will need to do some additional rotation or translation on top of the rotation
-	* and translation provided by the head pose.
-	*
-	* For devices where bPoseIsValid is true the application can use the pose to position the device
-	* in question. The provided array can be any size up to k_unMaxTrackedDeviceCount. 
-	*
-	* Seated experiences should call this method with TrackingUniverseSeated and receive poses relative
-	* to the seated zero pose. Standing experiences should call this method with TrackingUniverseStanding 
-	* and receive poses relative to the Chaperone Play Area. TrackingUniverseRawAndUncalibrated should 
-	* probably not be used unless the application is the Chaperone calibration tool itself, but will provide
-	* poses relative to the hardware-specific coordinate system in the driver.
-	*/
-	virtual void GetDeviceToAbsoluteTrackingPose( ETrackingUniverseOrigin eOrigin, float fPredictedSecondsToPhotonsFromNow, VR_ARRAY_COUNT(unTrackedDevicePoseArrayCount) TrackedDevicePose_t *pTrackedDevicePoseArray, uint32_t unTrackedDevicePoseArrayCount ) = 0;
-
-	/** Sets the zero pose for the seated tracker coordinate system to the current position and yaw of the HMD. After 
-	* ResetSeatedZeroPose all GetDeviceToAbsoluteTrackingPose calls that pass TrackingUniverseSeated as the origin 
-	* will be relative to this new zero pose. The new zero coordinate system will not change the fact that the Y axis 
-	* is up in the real world, so the next pose returned from GetDeviceToAbsoluteTrackingPose after a call to 
-	* ResetSeatedZeroPose may not be exactly an identity matrix.
-	*
-	* NOTE: This function overrides the user's previously saved seated zero pose and should only be called as the result of a user action. 
-	* Users are also able to set their seated zero pose via the OpenVR Dashboard.
-	**/
-	virtual void ResetSeatedZeroPose() = 0;
-
-	/** Returns the transform from the seated zero pose to the standing absolute tracking system. This allows 
-	* applications to represent the seated origin to used or transform object positions from one coordinate
-	* system to the other. 
-	*
-	* The seated origin may or may not be inside the Play Area or Collision Bounds returned by IVRChaperone. Its position 
-	* depends on what the user has set from the Dashboard settings and previous calls to ResetSeatedZeroPose. */
-	virtual HmdMatrix34_t GetSeatedZeroPoseToStandingAbsoluteTrackingPose() = 0;
-
-	/** Returns the transform from the tracking origin to the standing absolute tracking system. This allows
-	* applications to convert from raw tracking space to the calibrated standing coordinate system. */
-	virtual HmdMatrix34_t GetRawZeroPoseToStandingAbsoluteTrackingPose() = 0;
-
-	/** Get a sorted array of device indices of a given class of tracked devices (e.g. controllers).  Devices are sorted right to left
-	* relative to the specified tracked device (default: hmd -- pass in -1 for absolute tracking space).  Returns the number of devices
-	* in the list, or the size of the array needed if not large enough. */
-	virtual uint32_t GetSortedTrackedDeviceIndicesOfClass( ETrackedDeviceClass eTrackedDeviceClass, VR_ARRAY_COUNT(unTrackedDeviceIndexArrayCount) vr::TrackedDeviceIndex_t *punTrackedDeviceIndexArray, uint32_t unTrackedDeviceIndexArrayCount, vr::TrackedDeviceIndex_t unRelativeToTrackedDeviceIndex = k_unTrackedDeviceIndex_Hmd ) = 0;
-
-	/** Returns the level of activity on the device. */
-	virtual EDeviceActivityLevel GetTrackedDeviceActivityLevel( vr::TrackedDeviceIndex_t unDeviceId ) = 0;
-
-	/** Convenience utility to apply the specified transform to the specified pose.
-	*   This properly transforms all pose components, including velocity and angular velocity
-	*/
-	virtual void ApplyTransform( TrackedDevicePose_t *pOutputPose, const TrackedDevicePose_t *pTrackedDevicePose, const HmdMatrix34_t *pTransform ) = 0;
-
-	/** Returns the device index associated with a specific role, for example the left hand or the right hand. */
-	virtual vr::TrackedDeviceIndex_t GetTrackedDeviceIndexForControllerRole( vr::ETrackedControllerRole unDeviceType ) = 0;
-
-	/** Returns the controller type associated with a device index. */
-	virtual vr::ETrackedControllerRole GetControllerRoleForTrackedDeviceIndex( vr::TrackedDeviceIndex_t unDeviceIndex ) = 0;
-
-	// ------------------------------------
-	// Property methods
-	// ------------------------------------
-
-	/** Returns the device class of a tracked device. If there has not been a device connected in this slot
-	* since the application started this function will return TrackedDevice_Invalid. For previous detected
-	* devices the function will return the previously observed device class. 
-	*
-	* To determine which devices exist on the system, just loop from 0 to k_unMaxTrackedDeviceCount and check
-	* the device class. Every device with something other than TrackedDevice_Invalid is associated with an 
-	* actual tracked device. */
-	virtual ETrackedDeviceClass GetTrackedDeviceClass( vr::TrackedDeviceIndex_t unDeviceIndex ) = 0;
-
-	/** Returns true if there is a device connected in this slot. */
-	virtual bool IsTrackedDeviceConnected( vr::TrackedDeviceIndex_t unDeviceIndex ) = 0;
-
-	/** Returns a bool property. If the device index is not valid or the property is not a bool type this function will return false. */
-	virtual bool GetBoolTrackedDeviceProperty( vr::TrackedDeviceIndex_t unDeviceIndex, ETrackedDeviceProperty prop, ETrackedPropertyError *pError = 0L ) = 0;
-
-	/** Returns a float property. If the device index is not valid or the property is not a float type this function will return 0. */
-	virtual float GetFloatTrackedDeviceProperty( vr::TrackedDeviceIndex_t unDeviceIndex, ETrackedDeviceProperty prop, ETrackedPropertyError *pError = 0L ) = 0;
-
-	/** Returns an int property. If the device index is not valid or the property is not a int type this function will return 0. */
-	virtual int32_t GetInt32TrackedDeviceProperty( vr::TrackedDeviceIndex_t unDeviceIndex, ETrackedDeviceProperty prop, ETrackedPropertyError *pError = 0L ) = 0;
-
-	/** Returns a uint64 property. If the device index is not valid or the property is not a uint64 type this function will return 0. */
-	virtual uint64_t GetUint64TrackedDeviceProperty( vr::TrackedDeviceIndex_t unDeviceIndex, ETrackedDeviceProperty prop, ETrackedPropertyError *pError = 0L ) = 0;
-
-	/** Returns a matrix property. If the device index is not valid or the property is not a matrix type, this function will return identity. */
-	virtual HmdMatrix34_t GetMatrix34TrackedDeviceProperty( vr::TrackedDeviceIndex_t unDeviceIndex, ETrackedDeviceProperty prop, ETrackedPropertyError *pError = 0L ) = 0;
-
-	/** Returns 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 generally fit in buffers of k_unTrackingStringSize characters. */
-	virtual uint32_t GetStringTrackedDeviceProperty( vr::TrackedDeviceIndex_t unDeviceIndex, ETrackedDeviceProperty prop, VR_OUT_STRING() char *pchValue, uint32_t unBufferSize, ETrackedPropertyError *pError = 0L ) = 0;
-
-	/** returns a string that corresponds with the specified property error. The string will be the name 
-	* of the error enum value for all valid error codes */
-	virtual const char *GetPropErrorNameFromEnum( ETrackedPropertyError error ) = 0;
-
-	// ------------------------------------
-	// Event methods
-	// ------------------------------------
-
-	/** Returns true and fills the event with the next event on the queue if there is one. If there are no events
-	* this method returns false. uncbVREvent should be the size in bytes of the VREvent_t struct */
-	virtual bool PollNextEvent( VREvent_t *pEvent, uint32_t uncbVREvent ) = 0;
-
-	/** Returns true and fills the event with the next event on the queue if there is one. If there are no events
-	* this method returns false. Fills in the pose of the associated tracked device in the provided pose struct. 
-	* This pose will always be older than the call to this function and should not be used to render the device. 
-	uncbVREvent should be the size in bytes of the VREvent_t struct */
-	virtual bool PollNextEventWithPose( ETrackingUniverseOrigin eOrigin, VREvent_t *pEvent, uint32_t uncbVREvent, vr::TrackedDevicePose_t *pTrackedDevicePose ) = 0;
-
-	/** returns the name of an EVREvent enum value */
-	virtual const char *GetEventTypeNameFromEnum( EVREventType eType ) = 0;
-
-	// ------------------------------------
-	// Rendering helper methods
-	// ------------------------------------
-
-	/** Returns the stencil mesh information for the current HMD. If this HMD does not have a stencil mesh the vertex data and count will be
-	* NULL and 0 respectively. This mesh is meant to be rendered into the stencil buffer (or into the depth buffer setting nearz) before rendering
-	* each eye's view. The pixels covered by this mesh will never be seen by the user after the lens distortion is applied and based on visibility to the panels.
-	* This will improve perf by letting the GPU early-reject pixels the user will never see before running the pixel shader.
-	* NOTE: Render this mesh with backface culling disabled since the winding order of the vertices can be different per-HMD or per-eye.
-	*/
-	virtual HiddenAreaMesh_t GetHiddenAreaMesh( EVREye eEye ) = 0;
-
-
-	// ------------------------------------
-	// Controller methods
-	// ------------------------------------
-
-	/** Fills the supplied struct with the current state of the controller. Returns false if the controller index
-	* is invalid. */
-	virtual bool GetControllerState( vr::TrackedDeviceIndex_t unControllerDeviceIndex, vr::VRControllerState_t *pControllerState ) = 0;
-
-	/** fills the supplied struct with the current state of the controller and the provided pose with the pose of 
-	* the controller when the controller state was updated most recently. Use this form if you need a precise controller
-	* pose as input to your application when the user presses or releases a button. */
-	virtual bool GetControllerStateWithPose( ETrackingUniverseOrigin eOrigin, vr::TrackedDeviceIndex_t unControllerDeviceIndex, vr::VRControllerState_t *pControllerState, TrackedDevicePose_t *pTrackedDevicePose ) = 0;
-
-	/** Trigger a single haptic pulse on a controller. After this call the application may not trigger another haptic pulse on this controller
-	* and axis combination for 5ms. */
-	virtual void TriggerHapticPulse( vr::TrackedDeviceIndex_t unControllerDeviceIndex, uint32_t unAxisId, unsigned short usDurationMicroSec ) = 0;
-
-	/** returns the name of an EVRButtonId enum value */
-	virtual const char *GetButtonIdNameFromEnum( EVRButtonId eButtonId ) = 0;
-
-	/** returns the name of an EVRControllerAxisType enum value */
-	virtual const char *GetControllerAxisTypeNameFromEnum( EVRControllerAxisType eAxisType ) = 0;
-
-	/** Tells OpenVR that this process wants exclusive access to controller button states and button events. Other apps will be notified that 
-	* they have lost input focus with a VREvent_InputFocusCaptured event. Returns false if input focus could not be captured for
-	* some reason. */
-	virtual bool CaptureInputFocus() = 0;
-
-	/** Tells OpenVR that this process no longer wants exclusive access to button states and button events. Other apps will be notified 
-	* that input focus has been released with a VREvent_InputFocusReleased event. */
-	virtual void ReleaseInputFocus() = 0;
-
-	/** Returns true if input focus is captured by another process. */
-	virtual bool IsInputFocusCapturedByAnotherProcess() = 0;
-
-	// ------------------------------------
-	// Debug Methods
-	// ------------------------------------
-
-	/** Sends a request to the driver for the specified device and returns the response. The maximum response size is 32k,
-	* but this method can be called with a smaller buffer. If the response exceeds the size of the buffer, it is truncated. 
-	* The size of the response including its terminating null is returned. */
-	virtual uint32_t DriverDebugRequest( vr::TrackedDeviceIndex_t unDeviceIndex, const char *pchRequest, char *pchResponseBuffer, uint32_t unResponseBufferSize ) = 0;
-
-
-	// ------------------------------------
-	// Firmware methods
-	// ------------------------------------
-	
-	/** Performs the actual firmware update if applicable. 
-	 * The following events will be sent, if VRFirmwareError_None was returned: VREvent_FirmwareUpdateStarted, VREvent_FirmwareUpdateFinished 
-	 * Use the properties Prop_Firmware_UpdateAvailable_Bool, Prop_Firmware_ManualUpdate_Bool, and Prop_Firmware_ManualUpdateURL_String
-	 * to figure our whether a firmware update is available, and to figure out whether its a manual update 
-	 * Prop_Firmware_ManualUpdateURL_String should point to an URL describing the manual update process */
-	virtual vr::EVRFirmwareError PerformFirmwareUpdate( vr::TrackedDeviceIndex_t unDeviceIndex ) = 0;
-
-
-	// ------------------------------------
-	// Application life cycle methods
-	// ------------------------------------
-
-	/** Call this to acknowledge to the system that VREvent_Quit has been received and that the process is exiting.
-	* This extends the timeout until the process is killed. */
-	virtual void AcknowledgeQuit_Exiting() = 0;
-
-	/** Call this to tell the system that the user is being prompted to save data. This
-	* halts the timeout and dismisses the dashboard (if it was up). Applications should be sure to actually 
-	* prompt the user to save and then exit afterward, otherwise the user will be left in a confusing state. */
-	virtual void AcknowledgeQuit_UserPrompt() = 0;
-
-};
-
-static const char * const IVRSystem_Version = "IVRSystem_012";
-
-}
-
-
-// ivrapplications.h
-namespace vr
-{
-
-	/** Used for all errors reported by the IVRApplications interface */
-	enum EVRApplicationError
-	{
-		VRApplicationError_None = 0,
-
-		VRApplicationError_AppKeyAlreadyExists = 100,	// Only one application can use any given key
-		VRApplicationError_NoManifest = 101,			// the running application does not have a manifest
-		VRApplicationError_NoApplication = 102,			// No application is running
-		VRApplicationError_InvalidIndex = 103,
-		VRApplicationError_UnknownApplication = 104,	// the application could not be found
-		VRApplicationError_IPCFailed = 105,				// An IPC failure caused the request to fail
-		VRApplicationError_ApplicationAlreadyRunning = 106, 
-		VRApplicationError_InvalidManifest = 107,
-		VRApplicationError_InvalidApplication = 108,
-		VRApplicationError_LaunchFailed = 109,			// the process didn't start
-		VRApplicationError_ApplicationAlreadyStarting = 110, // the system was already starting the same application
-		VRApplicationError_LaunchInProgress = 111,		// The system was already starting a different application
-		VRApplicationError_OldApplicationQuitting = 112, 
-		VRApplicationError_TransitionAborted = 113,
-		VRApplicationError_IsTemplate = 114, // error when you try to call LaunchApplication() on a template type app (use LaunchTemplateApplication)
-
-		VRApplicationError_BufferTooSmall = 200,		// The provided buffer was too small to fit the requested data
-		VRApplicationError_PropertyNotSet = 201,		// The requested property was not set
-		VRApplicationError_UnknownProperty = 202,
-		VRApplicationError_InvalidParameter = 203,
-	};
-
-	/** The maximum length of an application key */
-	static const uint32_t k_unMaxApplicationKeyLength = 128;
-
-	/** these are the properties available on applications. */
-	enum EVRApplicationProperty
-	{
-		VRApplicationProperty_Name_String				= 0,
-
-		VRApplicationProperty_LaunchType_String			= 11,
-		VRApplicationProperty_WorkingDirectory_String	= 12,
-		VRApplicationProperty_BinaryPath_String			= 13,
-		VRApplicationProperty_Arguments_String			= 14,
-		VRApplicationProperty_URL_String				= 15,
-
-		VRApplicationProperty_Description_String		= 50,
-		VRApplicationProperty_NewsURL_String			= 51,
-		VRApplicationProperty_ImagePath_String			= 52,
-		VRApplicationProperty_Source_String				= 53,
-
-		VRApplicationProperty_IsDashboardOverlay_Bool	= 60,
-		VRApplicationProperty_IsTemplate_Bool			= 61,
-		VRApplicationProperty_IsInstanced_Bool			= 62,
-
-		VRApplicationProperty_LastLaunchTime_Uint64		= 70,
-	};
-
-	/** These are states the scene application startup process will go through. */
-	enum EVRApplicationTransitionState
-	{
-		VRApplicationTransition_None = 0,
-
-		VRApplicationTransition_OldAppQuitSent = 10,
-		VRApplicationTransition_WaitingForExternalLaunch = 11,
-		
-		VRApplicationTransition_NewAppLaunched = 20,
-	};
-
-	struct AppOverrideKeys_t
-	{
-		const char *pchKey;
-		const char *pchValue;
-	};
-
-	class IVRApplications
-	{
-	public:
-
-		// ---------------  Application management  --------------- //
-
-		/** Adds an application manifest to the list to load when building the list of installed applications. 
-		* Temporary manifests are not automatically loaded */
-		virtual EVRApplicationError AddApplicationManifest( const char *pchApplicationManifestFullPath, bool bTemporary = false ) = 0;
-
-		/** Removes an application manifest from the list to load when building the list of installed applications. */
-		virtual EVRApplicationError RemoveApplicationManifest( const char *pchApplicationManifestFullPath ) = 0;
-
-		/** Returns true if an application is installed */
-		virtual bool IsApplicationInstalled( const char *pchAppKey ) = 0;
-
-		/** Returns the number of applications available in the list */
-		virtual uint32_t GetApplicationCount() = 0;
-
-		/** Returns the key of the specified application. The index is at least 0 and is less than the return 
-		* value of GetApplicationCount(). The buffer should be at least k_unMaxApplicationKeyLength in order to 
-		* fit the key. */
-		virtual EVRApplicationError GetApplicationKeyByIndex( uint32_t unApplicationIndex, char *pchAppKeyBuffer, uint32_t unAppKeyBufferLen ) = 0;
-
-		/** Returns the key of the application for the specified Process Id. The buffer should be at least 
-		* k_unMaxApplicationKeyLength in order to fit the key. */
-		virtual EVRApplicationError GetApplicationKeyByProcessId( uint32_t unProcessId, char *pchAppKeyBuffer, uint32_t unAppKeyBufferLen ) = 0;
-
-		/** Launches the application. The existing scene application will exit and then the new application will start.
-		* This call is not valid for dashboard overlay applications. */
-		virtual EVRApplicationError LaunchApplication( const char *pchAppKey ) = 0;
-
-		/** Launches an instance of an application of type template, with its app key being pchNewAppKey (which must be unique) and optionally override sections
-		* from the manifest file via AppOverrideKeys_t
-		*/
-		virtual EVRApplicationError LaunchTemplateApplication( const char *pchTemplateAppKey, const char *pchNewAppKey, VR_ARRAY_COUNT( unKeys ) const AppOverrideKeys_t *pKeys, uint32_t unKeys ) = 0;
-
-		/** launches the application currently associated with this mime type and passes it the option args, typically the filename or object name of the item being launched */
-		virtual vr::EVRApplicationError LaunchApplicationFromMimeType( const char *pchMimeType, const char *pchArgs ) = 0;
-
-		/** Launches the dashboard overlay application if it is not already running. This call is only valid for 
-		* dashboard overlay applications. */
-		virtual EVRApplicationError LaunchDashboardOverlay( const char *pchAppKey ) = 0;
-
-		/** Cancel a pending launch for an application */
-		virtual bool CancelApplicationLaunch( const char *pchAppKey ) = 0;
-
-		/** Identifies a running application. OpenVR can't always tell which process started in response
-		* to a URL. This function allows a URL handler (or the process itself) to identify the app key 
-		* for the now running application. Passing a process ID of 0 identifies the calling process. 
-		* The application must be one that's known to the system via a call to AddApplicationManifest. */
-		virtual EVRApplicationError IdentifyApplication( uint32_t unProcessId, const char *pchAppKey ) = 0;
-
-		/** Returns the process ID for an application. Return 0 if the application was not found or is not running. */
-		virtual uint32_t GetApplicationProcessId( const char *pchAppKey ) = 0;
-
-		/** Returns a string for an applications error */
-		virtual const char *GetApplicationsErrorNameFromEnum( EVRApplicationError error ) = 0;
-
-		// ---------------  Application properties  --------------- //
-
-		/** Returns a value for an application property. The required buffer size to fit this value will be returned. */
-		virtual uint32_t GetApplicationPropertyString( const char *pchAppKey, EVRApplicationProperty eProperty, char *pchPropertyValueBuffer, uint32_t unPropertyValueBufferLen, EVRApplicationError *peError = nullptr ) = 0;
-
-		/** Returns a bool value for an application property. Returns false in all error cases. */
-		virtual bool GetApplicationPropertyBool( const char *pchAppKey, EVRApplicationProperty eProperty, EVRApplicationError *peError = nullptr ) = 0;
-
-		/** Returns a uint64 value for an application property. Returns 0 in all error cases. */
-		virtual uint64_t GetApplicationPropertyUint64( const char *pchAppKey, EVRApplicationProperty eProperty, EVRApplicationError *peError = nullptr ) = 0;
-
-		/** Sets the application auto-launch flag. This is only valid for applications which return true for VRApplicationProperty_IsDashboardOverlay_Bool. */
-		virtual EVRApplicationError SetApplicationAutoLaunch( const char *pchAppKey, bool bAutoLaunch ) = 0;
-
-		/** Gets the application auto-launch flag. This is only valid for applications which return true for VRApplicationProperty_IsDashboardOverlay_Bool. */
-		virtual bool GetApplicationAutoLaunch( const char *pchAppKey ) = 0;
-
-		/** Adds this mime-type to the list of supported mime types for this application*/
-		virtual EVRApplicationError SetDefaultApplicationForMimeType( const char *pchAppKey, const char *pchMimeType ) = 0;
-
-		/** return the app key that will open this mime type */
-		virtual bool GetDefaultApplicationForMimeType( const char *pchMimeType, char *pchAppKeyBuffer, uint32_t unAppKeyBufferLen ) = 0;
-
-		/** Get the list of supported mime types for this application, comma-delimited */
-		virtual bool GetApplicationSupportedMimeTypes( const char *pchAppKey, char *pchMimeTypesBuffer, uint32_t unMimeTypesBuffer ) = 0;
-
-		/** Get the list of app-keys that support this mime type, comma-delimited, the return value is number of bytes you need to return the full string */
-		virtual uint32_t GetApplicationsThatSupportMimeType( const char *pchMimeType, char *pchAppKeysThatSupportBuffer, uint32_t unAppKeysThatSupportBuffer ) = 0;
-
-		/** Get the args list from an app launch that had the process already running, you call this when you get a VREvent_ApplicationMimeTypeLoad */
-		virtual uint32_t GetApplicationLaunchArguments( uint32_t unHandle, char *pchArgs, uint32_t unArgs ) = 0;
-
-		// ---------------  Transition methods --------------- //
-
-		/** Returns the app key for the application that is starting up */
-		virtual EVRApplicationError GetStartingApplication( char *pchAppKeyBuffer, uint32_t unAppKeyBufferLen ) = 0;
-
-		/** Returns the application transition state */
-		virtual EVRApplicationTransitionState GetTransitionState() = 0;
-
-		/** Returns errors that would prevent the specified application from launching immediately. Calling this function will
-		* cause the current scene application to quit, so only call it when you are actually about to launch something else.
-		* What the caller should do about these failures depends on the failure:
-		*   VRApplicationError_OldApplicationQuitting - An existing application has been told to quit. Wait for a VREvent_ProcessQuit
-		*                                               and try again.
-		*   VRApplicationError_ApplicationAlreadyStarting - This application is already starting. This is a permanent failure.
-		*   VRApplicationError_LaunchInProgress	      - A different application is already starting. This is a permanent failure.
-		*   VRApplicationError_None                   - Go ahead and launch. Everything is clear.
-		*/
-		virtual EVRApplicationError PerformApplicationPrelaunchCheck( const char *pchAppKey ) = 0;
-
-		/** Returns a string for an application transition state */
-		virtual const char *GetApplicationsTransitionStateNameFromEnum( EVRApplicationTransitionState state ) = 0;
-
-		/** Returns true if the outgoing scene app has requested a save prompt before exiting */
-		virtual bool IsQuitUserPromptRequested() = 0;
-
-		/** Starts a subprocess within the calling application. This
-		* suppresses all application transition UI and automatically identifies the new executable 
-		* as part of the same application. On success the calling process should exit immediately. 
-		* If working directory is NULL or "" the directory portion of the binary path will be 
-		* the working directory. */
-		virtual EVRApplicationError LaunchInternalProcess( const char *pchBinaryPath, const char *pchArguments, const char *pchWorkingDirectory ) = 0;
-	};
-
-	static const char * const IVRApplications_Version = "IVRApplications_006";
-
-} // namespace vr
-
-// ivrsettings.h
-namespace vr
-{
-	enum EVRSettingsError
-	{
-		VRSettingsError_None = 0,
-		VRSettingsError_IPCFailed = 1,
-		VRSettingsError_WriteFailed = 2,
-		VRSettingsError_ReadFailed = 3,
-	};
-
-	// 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 bool GetBool( const char *pchSection, const char *pchSettingsKey, bool bDefaultValue, EVRSettingsError *peError = nullptr ) = 0;
-		virtual void SetBool( const char *pchSection, const char *pchSettingsKey, bool bValue, EVRSettingsError *peError = nullptr ) = 0;
-		virtual int32_t GetInt32( const char *pchSection, const char *pchSettingsKey, int32_t nDefaultValue, EVRSettingsError *peError = nullptr ) = 0;
-		virtual void SetInt32( const char *pchSection, const char *pchSettingsKey, int32_t nValue, EVRSettingsError *peError = nullptr ) = 0;
-		virtual float GetFloat( const char *pchSection, const char *pchSettingsKey, float flDefaultValue, EVRSettingsError *peError = nullptr ) = 0;
-		virtual void SetFloat( const char *pchSection, const char *pchSettingsKey, float flValue, EVRSettingsError *peError = nullptr ) = 0;
-		virtual void GetString( const char *pchSection, const char *pchSettingsKey, VR_OUT_STRING() char *pchValue, uint32_t unValueLen, const char *pchDefaultValue, EVRSettingsError *peError = nullptr ) = 0;
-		virtual void SetString( const char *pchSection, const char *pchSettingsKey, const char *pchValue, 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_001";
-
-	//-----------------------------------------------------------------------------
-	// 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_EnableDistortion_Bool = "enableDistortion";
-	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_BackgroundCameraHeight_Float = "backgroundCameraHeight";
-	static const char * const k_pch_SteamVR_BackgroundDomeRadius_Float = "backgroundDomeRadius";
-	static const char * const k_pch_SteamVR_Environment_String = "environment";
-	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_PowerOffOnExit_Bool = "powerOffOnExit";
-	static const char * const k_pch_SteamVR_StandbyAppRunningTimeout_Float = "standbyAppRunningTimeout";
-	static const char * const k_pch_SteamVR_StandbyNoAppTimeout_Float = "standbyNoAppTimeout";
-	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_RenderTargetMultiplier_Float = "renderTargetMultiplier";
-	static const char * const k_pch_SteamVR_AllowReprojection_Bool = "allowReprojection";
-	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_StartMonitorFromAppLaunch = "startMonitorFromAppLaunch";
-	static const char * const k_pch_SteamVR_AutoLaunchSteamVROnButtonPress = "autoLaunchSteamVROnButtonPress";
-	static const char * const k_pch_SteamVR_UseGenericGraphcisDevice_Bool = "useGenericGraphicsDevice";
-
-
-	//-----------------------------------------------------------------------------
-	// 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_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_LighthouseName_String = "lighthousename";
-	static const char * const k_pch_Lighthouse_MaxIncidenceAngleDegrees_Float = "maxincidenceangledegrees";
-	static const char * const k_pch_Lighthouse_UseLighthouseDirect_Bool = "uselighthousedirect";
-	static const char * const k_pch_Lighthouse_DBHistory_Bool = "dbhistory";
-
-	//-----------------------------------------------------------------------------
-	// null keys
-
-	static const char * const k_pch_Null_Section = "driver_null";
-	static const char * const k_pch_Null_EnableNullDriver_Bool = "enable";
-	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_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";
-
-	//-----------------------------------------------------------------------------
-	// 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";
-
-	//-----------------------------------------------------------------------------
-	// 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";
-
-	//-----------------------------------------------------------------------------
-	// model skin keys
-	static const char * const k_pch_modelskin_Section = "modelskins";
-
-} // namespace vr
-
-// ivrchaperone.h
-namespace vr
-{
-
-#if defined(__linux__) || defined(__APPLE__) 
-	// The 32-bit version of gcc has the alignment requirement for uint64 and double set to
-	// 4 meaning that even with #pragma pack(8) these types will only be four-byte aligned.
-	// The 64-bit version of gcc has the alignment requirement for these types set to
-	// 8 meaning that unless we use #pragma pack(4) our structures will get bigger.
-	// The 64-bit structure packing has to match the 32-bit structure packing for each platform.
-	#pragma pack( push, 4 )
-#else
-	#pragma pack( push, 8 )
-#endif
-
-enum ChaperoneCalibrationState
-{
-	// OK!
-	ChaperoneCalibrationState_OK = 1,									// Chaperone is fully calibrated and working correctly
-
-	// Warnings
-	ChaperoneCalibrationState_Warning = 100,
-	ChaperoneCalibrationState_Warning_BaseStationMayHaveMoved = 101,	// A base station thinks that it might have moved
-	ChaperoneCalibrationState_Warning_BaseStationRemoved = 102,			// There are less base stations than when calibrated
-	ChaperoneCalibrationState_Warning_SeatedBoundsInvalid = 103,		// Seated bounds haven't been calibrated for the current tracking center
-
-	// Errors
-	ChaperoneCalibrationState_Error = 200,								// The UniverseID is invalid
-	ChaperoneCalibrationState_Error_BaseStationUninitalized = 201,		// Tracking center hasn't be calibrated for at least one of the base stations
-	ChaperoneCalibrationState_Error_BaseStationConflict = 202,			// Tracking center is calibrated, but base stations disagree on the tracking space
-	ChaperoneCalibrationState_Error_PlayAreaInvalid = 203,				// Play Area hasn't been calibrated for the current tracking center
-	ChaperoneCalibrationState_Error_CollisionBoundsInvalid = 204,		// Collision Bounds haven't been calibrated for the current tracking center
-};
-
-
-/** HIGH LEVEL TRACKING SPACE ASSUMPTIONS:
-* 0,0,0 is the preferred standing area center.
-* 0Y is the floor height.
-* -Z is the preferred forward facing direction. */
-class IVRChaperone
-{
-public:
-
-	/** Get the current state of Chaperone calibration. This state can change at any time during a session due to physical base station changes. **/
-	virtual ChaperoneCalibrationState GetCalibrationState() = 0;
-
-	/** Returns the width and depth of the Play Area (formerly named Soft Bounds) in X and Z. 
-	* Tracking space center (0,0,0) is the center of the Play Area. **/
-	virtual bool GetPlayAreaSize( float *pSizeX, float *pSizeZ ) = 0;
-
-	/** Returns the 4 corner positions of the Play Area (formerly named Soft Bounds).
-	* Corners are in counter-clockwise order.
-	* Standing center (0,0,0) is the center of the Play Area.
-	* It's a rectangle.
-	* 2 sides are parallel to the X axis and 2 sides are parallel to the Z axis.
-	* Height of every corner is 0Y (on the floor). **/
-	virtual bool GetPlayAreaRect( HmdQuad_t *rect ) = 0;
-
-	/** Reload Chaperone data from the .vrchap file on disk. */
-	virtual void ReloadInfo( void ) = 0;
-
-	/** Optionally give the chaperone system a hit about the color and brightness in the scene **/
-	virtual void SetSceneColor( HmdColor_t color ) = 0;
-
-	/** Get the current chaperone bounds draw color and brightness **/
-	virtual void GetBoundsColor( HmdColor_t *pOutputColorArray, int nNumOutputColors, float flCollisionBoundsFadeDistance, HmdColor_t *pOutputCameraColor ) = 0;
-
-	/** Determine whether the bounds are showing right now **/
-	virtual bool AreBoundsVisible() = 0;
-
-	/** Force the bounds to show, mostly for utilities **/
-	virtual void ForceBoundsVisible( bool bForce ) = 0;
-};
-
-static const char * const IVRChaperone_Version = "IVRChaperone_003";
-
-#pragma pack( pop )
-
-}
-
-// ivrchaperonesetup.h
-namespace vr
-{
-
-enum EChaperoneConfigFile
-{
-	EChaperoneConfigFile_Live = 1,		// The live chaperone config, used by most applications and games
-	EChaperoneConfigFile_Temp = 2,		// The temporary chaperone config, used to live-preview collision bounds in room setup
-};
-
-enum EChaperoneImportFlags
-{
-	EChaperoneImport_BoundsOnly = 0x0001,
-};
-
-/** Manages the working copy of the chaperone info. By default this will be the same as the 
-* live copy. Any changes made with this interface will stay in the working copy until 
-* CommitWorkingCopy() is called, at which point the working copy and the live copy will be 
-* the same again. */
-class IVRChaperoneSetup
-{
-public:
-
-	/** Saves the current working copy to disk */
-	virtual bool CommitWorkingCopy( EChaperoneConfigFile configFile ) = 0;
-
-	/** Reverts the working copy to match the live chaperone calibration.
-	* To modify existing data this MUST be do WHILE getting a non-error ChaperoneCalibrationStatus.
-	* Only after this should you do gets and sets on the existing data. */
-	virtual void RevertWorkingCopy() = 0;
-
-	/** Returns the width and depth of the Play Area (formerly named Soft Bounds) in X and Z from the working copy.
-	* Tracking space center (0,0,0) is the center of the Play Area. */
-	virtual bool GetWorkingPlayAreaSize( float *pSizeX, float *pSizeZ ) = 0;
-
-	/** Returns the 4 corner positions of the Play Area (formerly named Soft Bounds) from the working copy.
-	* Corners are in clockwise order.
-	* Tracking space center (0,0,0) is the center of the Play Area.
-	* It's a rectangle.
-	* 2 sides are parallel to the X axis and 2 sides are parallel to the Z axis.
-	* Height of every corner is 0Y (on the floor). **/
-	virtual bool GetWorkingPlayAreaRect( HmdQuad_t *rect ) = 0;
-
-	/** Returns the number of Quads if the buffer points to null. Otherwise it returns Quads 
-	* into the buffer up to the max specified from the working copy. */
-	virtual bool GetWorkingCollisionBoundsInfo( VR_OUT_ARRAY_COUNT(punQuadsCount) HmdQuad_t *pQuadsBuffer, uint32_t* punQuadsCount ) = 0;
-
-	/** Returns the number of Quads if the buffer points to null. Otherwise it returns Quads 
-	* into the buffer up to the max specified. */
-	virtual bool GetLiveCollisionBoundsInfo( VR_OUT_ARRAY_COUNT(punQuadsCount) HmdQuad_t *pQuadsBuffer, uint32_t* punQuadsCount ) = 0;
-
-	/** Returns the preferred seated position from the working copy. */
-	virtual bool GetWorkingSeatedZeroPoseToRawTrackingPose( HmdMatrix34_t *pmatSeatedZeroPoseToRawTrackingPose ) = 0;
-
-	/** Returns the standing origin from the working copy. */
-	virtual bool GetWorkingStandingZeroPoseToRawTrackingPose( HmdMatrix34_t *pmatStandingZeroPoseToRawTrackingPose ) = 0;
-
-	/** Sets the Play Area in the working copy. */
-	virtual void SetWorkingPlayAreaSize( float sizeX, float sizeZ ) = 0;
-
-	/** Sets the Collision Bounds in the working copy. */
-	virtual void SetWorkingCollisionBoundsInfo( VR_ARRAY_COUNT(unQuadsCount) HmdQuad_t *pQuadsBuffer, uint32_t unQuadsCount ) = 0;
-
-	/** Sets the preferred seated position in the working copy. */
-	virtual void SetWorkingSeatedZeroPoseToRawTrackingPose( const HmdMatrix34_t *pMatSeatedZeroPoseToRawTrackingPose ) = 0;
-
-	/** Sets the preferred standing position in the working copy. */
-	virtual void SetWorkingStandingZeroPoseToRawTrackingPose( const HmdMatrix34_t *pMatStandingZeroPoseToRawTrackingPose ) = 0;
-
-	/** Tear everything down and reload it from the file on disk */
-	virtual void ReloadFromDisk( EChaperoneConfigFile configFile ) = 0;
-
-	/** Returns the preferred seated position. */
-	virtual bool GetLiveSeatedZeroPoseToRawTrackingPose( HmdMatrix34_t *pmatSeatedZeroPoseToRawTrackingPose ) = 0;
-
-	virtual void SetWorkingCollisionBoundsTagsInfo( VR_ARRAY_COUNT(unTagCount) uint8_t *pTagsBuffer, uint32_t unTagCount ) = 0;
-	virtual bool GetLiveCollisionBoundsTagsInfo( VR_OUT_ARRAY_COUNT(punTagCount) uint8_t *pTagsBuffer, uint32_t *punTagCount ) = 0;
-
-	virtual bool SetWorkingPhysicalBoundsInfo( VR_ARRAY_COUNT(unQuadsCount) HmdQuad_t *pQuadsBuffer, uint32_t unQuadsCount ) = 0;
-	virtual bool GetLivePhysicalBoundsInfo( VR_OUT_ARRAY_COUNT(punQuadsCount) HmdQuad_t *pQuadsBuffer, uint32_t* punQuadsCount ) = 0;
-
-	virtual bool ExportLiveToBuffer( VR_OUT_STRING() char *pBuffer, uint32_t *pnBufferLength ) = 0;
-	virtual bool ImportFromBufferToWorking( const char *pBuffer, uint32_t nImportFlags ) = 0;
-};
-
-static const char * const IVRChaperoneSetup_Version = "IVRChaperoneSetup_005";
-
-
-}
-
-// ivrcompositor.h
-namespace vr
-{
-
-#if defined(__linux__) || defined(__APPLE__) 
-	// The 32-bit version of gcc has the alignment requirement for uint64 and double set to
-	// 4 meaning that even with #pragma pack(8) these types will only be four-byte aligned.
-	// The 64-bit version of gcc has the alignment requirement for these types set to
-	// 8 meaning that unless we use #pragma pack(4) our structures will get bigger.
-	// The 64-bit structure packing has to match the 32-bit structure packing for each platform.
-	#pragma pack( push, 4 )
-#else
-	#pragma pack( push, 8 )
-#endif
-
-/** Errors that can occur with the VR compositor */
-enum EVRCompositorError
-{
-	VRCompositorError_None						= 0,
-	VRCompositorError_RequestFailed				= 1,
-	VRCompositorError_IncompatibleVersion		= 100,
-	VRCompositorError_DoNotHaveFocus			= 101,
-	VRCompositorError_InvalidTexture			= 102,
-	VRCompositorError_IsNotSceneApplication		= 103,
-	VRCompositorError_TextureIsOnWrongDevice	= 104,
-	VRCompositorError_TextureUsesUnsupportedFormat = 105,
-	VRCompositorError_SharedTexturesNotSupported = 106,
-	VRCompositorError_IndexOutOfRange			= 107,
-};
-
-const uint32_t VRCompositor_ReprojectionReason_Cpu = 0x01;
-const uint32_t VRCompositor_ReprojectionReason_Gpu = 0x02;
-
-/** Provides a single frame's timing information to the app */
-struct Compositor_FrameTiming
-{
-	uint32_t m_nSize; // Set to sizeof( Compositor_FrameTiming )
-	uint32_t m_nFrameIndex;
-	uint32_t m_nNumFramePresents; // number of times this frame was presented
-	uint32_t m_nNumDroppedFrames; // number of additional times previous frame was scanned out
-	uint32_t m_nReprojectionFlags;
-
-	/** Absolute time reference for comparing frames.  This aligns with the vsync that running start is relative to. */
-	double m_flSystemTimeInSeconds;
-
-	/** These times may include work from other processes due to OS scheduling.
-	* The fewer packets of work these are broken up into, the less likely this will happen.
-	* GPU work can be broken up by calling Flush.  This can sometimes be useful to get the GPU started
-	* processing that work earlier in the frame. */
-	float m_flPreSubmitGpuMs; // time spent rendering the scene (gpu work submitted between WaitGetPoses and second Submit)
-	float m_flPostSubmitGpuMs; // additional time spent rendering by application (e.g. companion window)
-	float m_flTotalRenderGpuMs; // time between work submitted immediately after present (ideally vsync) until the end of compositor submitted work
-	float m_flCompositorRenderGpuMs; // time spend performing distortion correction, rendering chaperone, overlays, etc.
-	float m_flCompositorRenderCpuMs; // time spent on cpu submitting the above work for this frame
-	float m_flCompositorIdleCpuMs; // time spent waiting for running start (application could have used this much more time)
-
-	/** Miscellaneous measured intervals. */
-	float m_flClientFrameIntervalMs; // time between calls to WaitGetPoses
-	float m_flPresentCallCpuMs; // time blocked on call to present (usually 0.0, but can go long)
-	float m_flWaitForPresentCpuMs; // time spent spin-waiting for frame index to change (not near-zero indicates wait object failure)
-	float m_flSubmitFrameMs; // time spent in IVRCompositor::Submit (not near-zero indicates driver issue)
-
-	/** The following are all relative to this frame's SystemTimeInSeconds */
-	float m_flWaitGetPosesCalledMs;
-	float m_flNewPosesReadyMs;
-	float m_flNewFrameReadyMs; // second call to IVRCompositor::Submit
-	float m_flCompositorUpdateStartMs;
-	float m_flCompositorUpdateEndMs;
-	float m_flCompositorRenderStartMs;
-
-	vr::TrackedDevicePose_t m_HmdPose; // pose used by app to render this frame
-};
-
-/** Cumulative stats for current application.  These are not cleared until a new app connects,
-* but they do stop accumulating once the associated app disconnects. */
-struct Compositor_CumulativeStats
-{
-	uint32_t m_nPid; // Process id associated with these stats (may no longer be running).
-	uint32_t m_nNumFramePresents; // total number of times we called present (includes reprojected frames)
-	uint32_t m_nNumDroppedFrames; // total number of times an old frame was re-scanned out (without reprojection)
-	uint32_t m_nNumReprojectedFrames; // total number of times a frame was scanned out a second time (with reprojection)
-
-	/** Values recorded at startup before application has fully faded in the first time. */
-	uint32_t m_nNumFramePresentsOnStartup;
-	uint32_t m_nNumDroppedFramesOnStartup;
-	uint32_t m_nNumReprojectedFramesOnStartup;
-
-	/** Applications may explicitly fade to the compositor.  This is usually to handle level transitions, and loading often causes
-	* system wide hitches.  The following stats are collected during this period.  Does not include values recorded during startup. */
-	uint32_t m_nNumLoading;
-	uint32_t m_nNumFramePresentsLoading;
-	uint32_t m_nNumDroppedFramesLoading;
-	uint32_t m_nNumReprojectedFramesLoading;
-
-	/** If we don't get a new frame from the app in less than 2.5 frames, then we assume the app has hung and start
-	* fading back to the compositor.  The following stats are a result of this, and are a subset of those recorded above.
-	* Does not include values recorded during start up or loading. */
-	uint32_t m_nNumTimedOut;
-	uint32_t m_nNumFramePresentsTimedOut;
-	uint32_t m_nNumDroppedFramesTimedOut;
-	uint32_t m_nNumReprojectedFramesTimedOut;
-};
-
-#pragma pack( pop )
-
-/** Allows the application to interact with the compositor */
-class IVRCompositor
-{
-public:
-	/** Sets tracking space returned by WaitGetPoses */
-	virtual void SetTrackingSpace( ETrackingUniverseOrigin eOrigin ) = 0;
-
-	/** Gets current tracking space returned by WaitGetPoses */
-	virtual ETrackingUniverseOrigin GetTrackingSpace() = 0;
-
-	/** Returns pose(s) to use to render scene (and optionally poses predicted two frames out for gameplay). */
-	virtual EVRCompositorError WaitGetPoses( VR_ARRAY_COUNT(unRenderPoseArrayCount) TrackedDevicePose_t* pRenderPoseArray, uint32_t unRenderPoseArrayCount,
-		VR_ARRAY_COUNT(unGamePoseArrayCount) TrackedDevicePose_t* pGamePoseArray, uint32_t unGamePoseArrayCount ) = 0;
-
-	/** Get the last set of poses returned by WaitGetPoses. */
-	virtual EVRCompositorError GetLastPoses( VR_ARRAY_COUNT( unRenderPoseArrayCount ) TrackedDevicePose_t* pRenderPoseArray, uint32_t unRenderPoseArrayCount,
-		VR_ARRAY_COUNT( unGamePoseArrayCount ) TrackedDevicePose_t* pGamePoseArray, uint32_t unGamePoseArrayCount ) = 0;
-
-	/** Interface for accessing last set of poses returned by WaitGetPoses one at a time.
-	* Returns VRCompositorError_IndexOutOfRange if unDeviceIndex not less than k_unMaxTrackedDeviceCount otherwise VRCompositorError_None.
-	* It is okay to pass NULL for either pose if you only want one of the values. */
-	virtual EVRCompositorError GetLastPoseForTrackedDeviceIndex( TrackedDeviceIndex_t unDeviceIndex, TrackedDevicePose_t *pOutputPose, TrackedDevicePose_t *pOutputGamePose ) = 0;
-
-	/** Updated scene texture to display. If pBounds is NULL the entire texture will be used.  If called from an OpenGL app, consider adding a glFlush after
-	* Submitting both frames to signal the driver to start processing, otherwise it may wait until the command buffer fills up, causing the app to miss frames.
-	*
-	* OpenGL dirty state:
-	*	glBindTexture
-	*/
-	virtual EVRCompositorError Submit( EVREye eEye, const Texture_t *pTexture, const VRTextureBounds_t* pBounds = 0, EVRSubmitFlags nSubmitFlags = Submit_Default ) = 0;
-
-	/** Clears the frame that was sent with the last call to Submit. This will cause the 
-	* compositor to show the grid until Submit is called again. */
-	virtual void ClearLastSubmittedFrame() = 0;
-
-	/** Call immediately after presenting your app's window (i.e. companion window) to unblock the compositor.
-	* This is an optional call, which only needs to be used if you can't instead call WaitGetPoses immediately after Present.
-	* For example, if your engine's render and game loop are not on separate threads, or blocking the render thread until 3ms before the next vsync would
-	* introduce a deadlock of some sort.  This function tells the compositor that you have finished all rendering after having Submitted buffers for both
-	* eyes, and it is free to start its rendering work.  This should only be called from the same thread you are rendering on. */
-	virtual void PostPresentHandoff() = 0;
-
-	/** Returns true if timing data is filled it.  Sets oldest timing info if nFramesAgo is larger than the stored history.
-	* Be sure to set timing.size = sizeof(Compositor_FrameTiming) on struct passed in before calling this function. */
-	virtual bool GetFrameTiming( Compositor_FrameTiming *pTiming, uint32_t unFramesAgo = 0 ) = 0;
-
-	/** Returns the time in seconds left in the current (as identified by FrameTiming's frameIndex) frame.
-	* Due to "running start", this value may roll over to the next frame before ever reaching 0.0. */
-	virtual float GetFrameTimeRemaining() = 0;
-
-	/** Fills out stats accumulated for the last connected application.  Pass in sizeof( Compositor_CumulativeStats ) as second parameter. */
-	virtual void GetCumulativeStats( Compositor_CumulativeStats *pStats, uint32_t nStatsSizeInBytes ) = 0;
-
-	/** Fades the view on the HMD to the specified color. The fade will take fSeconds, and the color values are between
-	* 0.0 and 1.0. This color is faded on top of the scene based on the alpha parameter. Removing the fade color instantly 
-	* would be FadeToColor( 0.0, 0.0, 0.0, 0.0, 0.0 ).  Values are in un-premultiplied alpha space. */
-	virtual void FadeToColor( float fSeconds, float fRed, float fGreen, float fBlue, float fAlpha, bool bBackground = false ) = 0;
-
-	/** Fading the Grid in or out in fSeconds */
-	virtual void FadeGrid( float fSeconds, bool bFadeIn ) = 0;
-
-	/** Override the skybox used in the compositor (e.g. for during level loads when the app can't feed scene images fast enough)
-	* Order is Front, Back, Left, Right, Top, Bottom.  If only a single texture is passed, it is assumed in lat-long format.
-	* If two are passed, it is assumed a lat-long stereo pair. */
-	virtual EVRCompositorError SetSkyboxOverride( VR_ARRAY_COUNT( unTextureCount ) const Texture_t *pTextures, uint32_t unTextureCount ) = 0;
-
-	/** Resets compositor skybox back to defaults. */
-	virtual void ClearSkyboxOverride() = 0;
-
-	/** Brings the compositor window to the front. This is useful for covering any other window that may be on the HMD
-	* and is obscuring the compositor window. */
-	virtual void CompositorBringToFront() = 0;
-
-	/** Pushes the compositor window to the back. This is useful for allowing other applications to draw directly to the HMD. */
-	virtual void CompositorGoToBack() = 0;
-
-	/** Tells the compositor process to clean up and exit. You do not need to call this function at shutdown. Under normal 
-	* circumstances the compositor will manage its own life cycle based on what applications are running. */
-	virtual void CompositorQuit() = 0;
-	
-	/** Return whether the compositor is fullscreen */
-	virtual bool IsFullscreen() = 0;
-
-	/** Returns the process ID of the process that is currently rendering the scene */
-	virtual uint32_t GetCurrentSceneFocusProcess() = 0;
-
-	/** Returns the process ID of the process that rendered the last frame (or 0 if the compositor itself rendered the frame.)
-	* Returns 0 when fading out from an app and the app's process Id when fading into an app. */
-	virtual uint32_t GetLastFrameRenderer() = 0;
-
-	/** Returns true if the current process has the scene focus */
-	virtual bool CanRenderScene() = 0;
-
-	/** Creates a window on the primary monitor to display what is being shown in the headset. */
-	virtual void ShowMirrorWindow() = 0;
-
-	/** Closes the mirror window. */
-	virtual void HideMirrorWindow() = 0;
-
-	/** Returns true if the mirror window is shown. */
-	virtual bool IsMirrorWindowVisible() = 0;
-
-	/** Writes all images that the compositor knows about (including overlays) to a 'screenshots' folder in the SteamVR runtime root. */
-	virtual void CompositorDumpImages() = 0;
-
-	/** Let an app know it should be rendering with low resources. */
-	virtual bool ShouldAppRenderWithLowResources() = 0;
-
-	/** Override interleaved reprojection logic to force on. */
-	virtual void ForceInterleavedReprojectionOn( bool bOverride ) = 0;
-
-	/** Force reconnecting to the compositor process. */
-	virtual void ForceReconnectProcess() = 0;
-
-	/** Temporarily suspends rendering (useful for finer control over scene transitions). */
-	virtual void SuspendRendering( bool bSuspend ) = 0;
-
-	/** Opens a shared D3D11 texture with the undistorted composited image for each eye. */
-	virtual vr::EVRCompositorError GetMirrorTextureD3D11( vr::EVREye eEye, void *pD3D11DeviceOrResource, void **ppD3D11ShaderResourceView ) = 0;
-
-	/** Access to mirror textures from OpenGL. */
-	virtual vr::EVRCompositorError GetMirrorTextureGL( vr::EVREye eEye, vr::glUInt_t *pglTextureId, vr::glSharedTextureHandle_t *pglSharedTextureHandle ) = 0;
-	virtual bool ReleaseSharedGLTexture( vr::glUInt_t glTextureId, vr::glSharedTextureHandle_t glSharedTextureHandle ) = 0;
-	virtual void LockGLSharedTextureForAccess( vr::glSharedTextureHandle_t glSharedTextureHandle ) = 0;
-	virtual void UnlockGLSharedTextureForAccess( vr::glSharedTextureHandle_t glSharedTextureHandle ) = 0;
-};
-
-static const char * const IVRCompositor_Version = "IVRCompositor_016";
-
-} // namespace vr
-
-
-
-// ivrnotifications.h
-namespace vr
-{
-
-#if defined(__linux__) || defined(__APPLE__) 
-	// The 32-bit version of gcc has the alignment requirement for uint64 and double set to
-	// 4 meaning that even with #pragma pack(8) these types will only be four-byte aligned.
-	// The 64-bit version of gcc has the alignment requirement for these types set to
-	// 8 meaning that unless we use #pragma pack(4) our structures will get bigger.
-	// The 64-bit structure packing has to match the 32-bit structure packing for each platform.
-	#pragma pack( push, 4 )
-#else
-	#pragma pack( push, 8 )
-#endif
-
-// Used for passing graphic data
-struct NotificationBitmap_t
-{
-	NotificationBitmap_t()
-		: m_pImageData( nullptr )
-		, m_nWidth( 0 )
-		, m_nHeight( 0 )
-		, m_nBytesPerPixel( 0 )
-	{
-	};
-
-	void *m_pImageData;
-	int32_t m_nWidth;
-	int32_t m_nHeight;
-	int32_t m_nBytesPerPixel;
-};
-
-
-/** Be aware that the notification type is used as 'priority' to pick the next notification */
-enum EVRNotificationType
-{
-	/** Transient notifications are automatically hidden after a period of time set by the user. 
-	* They are used for things like information and chat messages that do not require user interaction. */
-	EVRNotificationType_Transient = 0,
-
-	/** Persistent notifications are shown to the user until they are hidden by calling RemoveNotification().
-	* They are used for things like phone calls and alarms that require user interaction. */
-	EVRNotificationType_Persistent = 1,
-
-	/** System notifications are shown no matter what. It is expected, that the ulUserValue is used as ID.
-	 * If there is already a system notification in the queue with that ID it is not accepted into the queue
-	 * to prevent spamming with system notification */
-	EVRNotificationType_Transient_SystemWithUserValue = 2,
-};
-
-enum EVRNotificationStyle
-{
-	/** Creates a notification with minimal external styling. */
-	EVRNotificationStyle_None = 0,
-
-	/** Used for notifications about overlay-level status. In Steam this is used for events like downloads completing. */
-	EVRNotificationStyle_Application = 100,
-
-	/** Used for notifications about contacts that are unknown or not available. In Steam this is used for friend invitations and offline friends. */
-	EVRNotificationStyle_Contact_Disabled = 200,
-
-	/** Used for notifications about contacts that are available but inactive. In Steam this is used for friends that are online but not playing a game. */
-	EVRNotificationStyle_Contact_Enabled = 201,
-
-	/** Used for notifications about contacts that are available and active. In Steam this is used for friends that are online and currently running a game. */
-	EVRNotificationStyle_Contact_Active = 202,
-};
-
-static const uint32_t k_unNotificationTextMaxSize = 256;
-
-typedef uint32_t VRNotificationId;
-
-
-
-#pragma pack( pop )
-
-/** Allows notification sources to interact with the VR system
-	This current interface is not yet implemented. Do not use yet. */
-class IVRNotifications
-{
-public:
-	/** Create a notification and enqueue it to be shown to the user.
-	* An overlay handle is required to create a notification, as otherwise it would be impossible for a user to act on it.
-	* To create a two-line notification, use a line break ('\n') to split the text into two lines.
-	* The pImage argument may be NULL, in which case the specified overlay's icon will be used instead. */
-	virtual EVRNotificationError CreateNotification( VROverlayHandle_t ulOverlayHandle, uint64_t ulUserValue, EVRNotificationType type, const char *pchText, EVRNotificationStyle style, const NotificationBitmap_t *pImage, /* out */ VRNotificationId *pNotificationId ) = 0;
-
-	/** Destroy a notification, hiding it first if it currently shown to the user. */
-	virtual EVRNotificationError RemoveNotification( VRNotificationId notificationId ) = 0;
-
-};
-
-static const char * const IVRNotifications_Version = "IVRNotifications_002";
-
-} // namespace vr
-
-
-
-// ivroverlay.h
-namespace vr
-{
-
-	/** The maximum length of an overlay key in bytes, counting the terminating null character. */
-	static const uint32_t k_unVROverlayMaxKeyLength = 128;
-
-	/** The maximum length of an overlay name in bytes, counting the terminating null character. */
-	static const uint32_t k_unVROverlayMaxNameLength = 128;
-
-	/** The maximum number of overlays that can exist in the system at one time. */
-	static const uint32_t k_unMaxOverlayCount = 64;
-
-	/** Types of input supported by VR Overlays */
-	enum VROverlayInputMethod
-	{
-		VROverlayInputMethod_None		= 0, // No input events will be generated automatically for this overlay
-		VROverlayInputMethod_Mouse		= 1, // Tracked controllers will get mouse events automatically
-	};
-
-	/** Allows the caller to figure out which overlay transform getter to call. */
-	enum VROverlayTransformType
-	{
-		VROverlayTransform_Absolute					= 0,
-		VROverlayTransform_TrackedDeviceRelative	= 1,
-		VROverlayTransform_SystemOverlay			= 2,
-		VROverlayTransform_TrackedComponent 		= 3,
-	};
-
-	/** Overlay control settings */
-	enum VROverlayFlags
-	{
-		VROverlayFlags_None			= 0,
-
-		// The following only take effect when rendered using the high quality render path (see SetHighQualityOverlay).
-		VROverlayFlags_Curved		= 1,
-		VROverlayFlags_RGSS4X		= 2,
-
-		// Set this flag on a dashboard overlay to prevent a tab from showing up for that overlay
-		VROverlayFlags_NoDashboardTab = 3,
-
-		// Set this flag on a dashboard that is able to deal with gamepad focus events
-		VROverlayFlags_AcceptsGamepadEvents = 4,
-
-		// Indicates that the overlay should dim/brighten to show gamepad focus
-		VROverlayFlags_ShowGamepadFocus = 5,
-
-		// When in VROverlayInputMethod_Mouse you can optionally enable sending VRScroll_t 
-		VROverlayFlags_SendVRScrollEvents = 6,
-		VROverlayFlags_SendVRTouchpadEvents = 7,
-
-		// If set this will render a vertical scroll wheel on the primary controller, 
-		//  only needed if not using VROverlayFlags_SendVRScrollEvents but you still want to represent a scroll wheel
-		VROverlayFlags_ShowTouchPadScrollWheel = 8,
-
-		// If this is set ownership and render access to the overlay are transferred 
-		// to the new scene process on a call to IVRApplications::LaunchInternalProcess
-		VROverlayFlags_TransferOwnershipToInternalProcess = 9,
-
-		// If set, renders 50% of the texture in each eye, side by side
-		VROverlayFlags_SideBySide_Parallel = 10, // Texture is left/right
-		VROverlayFlags_SideBySide_Crossed = 11, // Texture is crossed and right/left
-
-		VROverlayFlags_Panorama = 12, // Texture is a panorama
-		VROverlayFlags_StereoPanorama = 13, // Texture is a stereo panorama
-
-		// If this is set on an overlay owned by the scene application that overlay
-		// will be sorted with the "Other" overlays on top of all other scene overlays
-		VROverlayFlags_SortWithNonSceneOverlays = 14,
-	};
-
-	struct VROverlayIntersectionParams_t
-	{
-		HmdVector3_t vSource;
-		HmdVector3_t vDirection;
-		ETrackingUniverseOrigin eOrigin;
-	};
-
-	struct VROverlayIntersectionResults_t
-	{
-		HmdVector3_t vPoint;
-		HmdVector3_t vNormal;
-		HmdVector2_t vUVs;
-		float fDistance;
-	};
-
-	// Input modes for the Big Picture gamepad text entry
-	enum EGamepadTextInputMode
-	{
-		k_EGamepadTextInputModeNormal = 0,
-		k_EGamepadTextInputModePassword = 1,
-		k_EGamepadTextInputModeSubmit = 2,
-	};
-
-	// Controls number of allowed lines for the Big Picture gamepad text entry
-	enum EGamepadTextInputLineMode
-	{
-		k_EGamepadTextInputLineModeSingleLine = 0,
-		k_EGamepadTextInputLineModeMultipleLines = 1
-	};
-
-	/** Directions for changing focus between overlays with the gamepad */
-	enum EOverlayDirection
-	{
-		OverlayDirection_Up = 0,
-		OverlayDirection_Down = 1,
-		OverlayDirection_Left = 2,
-		OverlayDirection_Right = 3,
-		
-		OverlayDirection_Count = 4,
-	};
-
-	class IVROverlay
-	{
-	public:
-
-		// ---------------------------------------------
-		// Overlay management methods
-		// ---------------------------------------------
-
-		/** Finds an existing overlay with the specified key. */
-		virtual EVROverlayError FindOverlay( const char *pchOverlayKey, VROverlayHandle_t * pOverlayHandle ) = 0;
-
-		/** Creates a new named overlay. All overlays start hidden and with default settings. */
-		virtual EVROverlayError CreateOverlay( const char *pchOverlayKey, const char *pchOverlayFriendlyName, VROverlayHandle_t * pOverlayHandle ) = 0;
-
-		/** Destroys the specified overlay. When an application calls VR_Shutdown all overlays created by that app are
-		* automatically destroyed. */
-		virtual EVROverlayError DestroyOverlay( VROverlayHandle_t ulOverlayHandle ) = 0;
-
-		/** Specify which overlay to use the high quality render path.  This overlay will be composited in during the distortion pass which
-		* results in it drawing on top of everything else, but also at a higher quality as it samples the source texture directly rather than
-		* rasterizing into each eye's render texture first.  Because if this, only one of these is supported at any given time.  It is most useful
-		* for overlays that are expected to take up most of the user's view (e.g. streaming video).
-		* This mode does not support mouse input to your overlay. */
-		virtual EVROverlayError SetHighQualityOverlay( VROverlayHandle_t ulOverlayHandle ) = 0;
-
-		/** Returns the overlay handle of the current overlay being rendered using the single high quality overlay render path.
-		* Otherwise it will return k_ulOverlayHandleInvalid. */
-		virtual vr::VROverlayHandle_t GetHighQualityOverlay() = 0;
-
-		/** Fills the provided buffer with the string key of the overlay. Returns the size of buffer required to store the key, including
-		* the terminating null character. k_unVROverlayMaxKeyLength will be enough bytes to fit the string. */
-		virtual uint32_t GetOverlayKey( VROverlayHandle_t ulOverlayHandle, VR_OUT_STRING() char *pchValue, uint32_t unBufferSize, EVROverlayError *pError = 0L ) = 0;
-
-		/** Fills the provided buffer with the friendly name of the overlay. Returns the size of buffer required to store the key, including
-		* the terminating null character. k_unVROverlayMaxNameLength will be enough bytes to fit the string. */
-		virtual uint32_t GetOverlayName( VROverlayHandle_t ulOverlayHandle, VR_OUT_STRING() char *pchValue, uint32_t unBufferSize, EVROverlayError *pError = 0L ) = 0;
-
-		/** Gets the raw image data from an overlay. Overlay image data is always returned as RGBA data, 4 bytes per pixel. If the buffer is not large enough, width and height 
-		* will be set and VROverlayError_ArrayTooSmall is returned. */
-		virtual EVROverlayError GetOverlayImageData( VROverlayHandle_t ulOverlayHandle, void *pvBuffer, uint32_t unBufferSize, uint32_t *punWidth, uint32_t *punHeight ) = 0;
-
-		/** returns a string that corresponds with the specified overlay error. The string will be the name 
-		* of the error enum value for all valid error codes */
-		virtual const char *GetOverlayErrorNameFromEnum( EVROverlayError error ) = 0;
-
-
-		// ---------------------------------------------
-		// Overlay rendering methods
-		// ---------------------------------------------
-
-		/** Sets the pid that is allowed to render to this overlay (the creator pid is always allow to render),
-		*	by default this is the pid of the process that made the overlay */
-		virtual EVROverlayError SetOverlayRenderingPid( VROverlayHandle_t ulOverlayHandle, uint32_t unPID ) = 0;
-
-		/** Gets the pid that is allowed to render to this overlay */
-		virtual uint32_t GetOverlayRenderingPid( VROverlayHandle_t ulOverlayHandle ) = 0;
-
-		/** Specify flag setting for a given overlay */
-		virtual EVROverlayError SetOverlayFlag( VROverlayHandle_t ulOverlayHandle, VROverlayFlags eOverlayFlag, bool bEnabled ) = 0;
-
-		/** Sets flag setting for a given overlay */
-		virtual EVROverlayError GetOverlayFlag( VROverlayHandle_t ulOverlayHandle, VROverlayFlags eOverlayFlag, bool *pbEnabled ) = 0;
-
-		/** Sets the color tint of the overlay quad. Use 0.0 to 1.0 per channel. */
-		virtual EVROverlayError SetOverlayColor( VROverlayHandle_t ulOverlayHandle, float fRed, float fGreen, float fBlue ) = 0;
-
-		/** Gets the color tint of the overlay quad. */
-		virtual EVROverlayError GetOverlayColor( VROverlayHandle_t ulOverlayHandle, float *pfRed, float *pfGreen, float *pfBlue ) = 0;
-
-		/** Sets the alpha of the overlay quad. Use 1.0 for 100 percent opacity to 0.0 for 0 percent opacity. */
-		virtual EVROverlayError SetOverlayAlpha( VROverlayHandle_t ulOverlayHandle, float fAlpha ) = 0;
-
-		/** Gets the alpha of the overlay quad. By default overlays are rendering at 100 percent alpha (1.0). */
-		virtual EVROverlayError GetOverlayAlpha( VROverlayHandle_t ulOverlayHandle, float *pfAlpha ) = 0;
-
-		/** Sets the aspect ratio of the texels in the overlay. 1.0 means the texels are square. 2.0 means the texels
-		* are twice as wide as they are tall. Defaults to 1.0. */
-		virtual EVROverlayError SetOverlayTexelAspect( VROverlayHandle_t ulOverlayHandle, float fTexelAspect ) = 0;
-
-		/** Gets the aspect ratio of the texels in the overlay. Defaults to 1.0 */
-		virtual EVROverlayError GetOverlayTexelAspect( VROverlayHandle_t ulOverlayHandle, float *pfTexelAspect ) = 0;
-
-		/** Sets the rendering sort order for the overlay. Overlays are rendered this order:
-		*      Overlays owned by the scene application
-		*      Overlays owned by some other application
-		*
-		*	Within a category overlays are rendered lowest sort order to highest sort order. Overlays with the same 
-		*	sort order are rendered back to front base on distance from the HMD.
-		*
-		*	Sort order defaults to 0. */
-		virtual EVROverlayError SetOverlaySortOrder( VROverlayHandle_t ulOverlayHandle, uint32_t unSortOrder ) = 0;
-
-		/** Gets the sort order of the overlay. See SetOverlaySortOrder for how this works. */
-		virtual EVROverlayError GetOverlaySortOrder( VROverlayHandle_t ulOverlayHandle, uint32_t *punSortOrder ) = 0;
-
-		/** Sets the width of the overlay quad in meters. By default overlays are rendered on a quad that is 1 meter across */
-		virtual EVROverlayError SetOverlayWidthInMeters( VROverlayHandle_t ulOverlayHandle, float fWidthInMeters ) = 0;
-
-		/** Returns the width of the overlay quad in meters. By default overlays are rendered on a quad that is 1 meter across */
-		virtual EVROverlayError GetOverlayWidthInMeters( VROverlayHandle_t ulOverlayHandle, float *pfWidthInMeters ) = 0;
-
-		/** For high-quality curved overlays only, sets the distance range in meters from the overlay used to automatically curve
-		* the surface around the viewer.  Min is distance is when the surface will be most curved.  Max is when least curved. */
-		virtual EVROverlayError SetOverlayAutoCurveDistanceRangeInMeters( VROverlayHandle_t ulOverlayHandle, float fMinDistanceInMeters, float fMaxDistanceInMeters ) = 0;
-
-		/** For high-quality curved overlays only, gets the distance range in meters from the overlay used to automatically curve
-		* the surface around the viewer.  Min is distance is when the surface will be most curved.  Max is when least curved. */
-		virtual EVROverlayError GetOverlayAutoCurveDistanceRangeInMeters( VROverlayHandle_t ulOverlayHandle, float *pfMinDistanceInMeters, float *pfMaxDistanceInMeters ) = 0;
-
-		/** Sets the colorspace the overlay texture's data is in.  Defaults to 'auto'.
-		* If the texture needs to be resolved, you should call SetOverlayTexture with the appropriate colorspace instead. */
-		virtual EVROverlayError SetOverlayTextureColorSpace( VROverlayHandle_t ulOverlayHandle, EColorSpace eTextureColorSpace ) = 0;
-
-		/** Gets the overlay's current colorspace setting. */
-		virtual EVROverlayError GetOverlayTextureColorSpace( VROverlayHandle_t ulOverlayHandle, EColorSpace *peTextureColorSpace ) = 0;
-
-		/** Sets the part of the texture to use for the overlay. UV Min is the upper left corner and UV Max is the lower right corner. */
-		virtual EVROverlayError SetOverlayTextureBounds( VROverlayHandle_t ulOverlayHandle, const VRTextureBounds_t *pOverlayTextureBounds ) = 0;
-
-		/** Gets the part of the texture to use for the overlay. UV Min is the upper left corner and UV Max is the lower right corner. */
-		virtual EVROverlayError GetOverlayTextureBounds( VROverlayHandle_t ulOverlayHandle, VRTextureBounds_t *pOverlayTextureBounds ) = 0;
-
-		/** Returns the transform type of this overlay. */
-		virtual EVROverlayError GetOverlayTransformType( VROverlayHandle_t ulOverlayHandle, VROverlayTransformType *peTransformType ) = 0;
-
-		/** Sets the transform to absolute tracking origin. */
-		virtual EVROverlayError SetOverlayTransformAbsolute( VROverlayHandle_t ulOverlayHandle, ETrackingUniverseOrigin eTrackingOrigin, const HmdMatrix34_t *pmatTrackingOriginToOverlayTransform ) = 0;
-
-		/** Gets the transform if it is absolute. Returns an error if the transform is some other type. */
-		virtual EVROverlayError GetOverlayTransformAbsolute( VROverlayHandle_t ulOverlayHandle, ETrackingUniverseOrigin *peTrackingOrigin, HmdMatrix34_t *pmatTrackingOriginToOverlayTransform ) = 0;
-
-		/** Sets the transform to relative to the transform of the specified tracked device. */
-		virtual EVROverlayError SetOverlayTransformTrackedDeviceRelative( VROverlayHandle_t ulOverlayHandle, TrackedDeviceIndex_t unTrackedDevice, const HmdMatrix34_t *pmatTrackedDeviceToOverlayTransform ) = 0;
-
-		/** Gets the transform if it is relative to a tracked device. Returns an error if the transform is some other type. */
-		virtual EVROverlayError GetOverlayTransformTrackedDeviceRelative( VROverlayHandle_t ulOverlayHandle, TrackedDeviceIndex_t *punTrackedDevice, HmdMatrix34_t *pmatTrackedDeviceToOverlayTransform ) = 0;
-
-		/** Sets the transform to draw the overlay on a rendermodel component mesh instead of a quad. This will only draw when the system is
-		* drawing the device. Overlays with this transform type cannot receive mouse events. */
-		virtual EVROverlayError SetOverlayTransformTrackedDeviceComponent( VROverlayHandle_t ulOverlayHandle, TrackedDeviceIndex_t unDeviceIndex, const char *pchComponentName ) = 0;
-
-		/** Gets the transform information when the overlay is rendering on a component. */
-		virtual EVROverlayError GetOverlayTransformTrackedDeviceComponent( VROverlayHandle_t ulOverlayHandle, TrackedDeviceIndex_t *punDeviceIndex, char *pchComponentName, uint32_t unComponentNameSize ) = 0;
-
-		/** Shows the VR overlay.  For dashboard overlays, only the Dashboard Manager is allowed to call this. */
-		virtual EVROverlayError ShowOverlay( VROverlayHandle_t ulOverlayHandle ) = 0;
-
-		/** Hides the VR overlay.  For dashboard overlays, only the Dashboard Manager is allowed to call this. */
-		virtual EVROverlayError HideOverlay( VROverlayHandle_t ulOverlayHandle ) = 0;
-
-		/** Returns true if the overlay is visible. */
-		virtual bool IsOverlayVisible( VROverlayHandle_t ulOverlayHandle ) = 0;
-
-		/** Get the transform in 3d space associated with a specific 2d point in the overlay's coordinate space (where 0,0 is the lower left). -Z points out of the overlay */
-		virtual EVROverlayError GetTransformForOverlayCoordinates( VROverlayHandle_t ulOverlayHandle, ETrackingUniverseOrigin eTrackingOrigin, HmdVector2_t coordinatesInOverlay, HmdMatrix34_t *pmatTransform ) = 0;
-
-		// ---------------------------------------------
-		// Overlay input methods
-		// ---------------------------------------------
-
-		/** Returns true and fills the event with the next event on the overlay's event queue, if there is one. 
-		* If there are no events this method returns false. uncbVREvent should be the size in bytes of the VREvent_t struct */
-		virtual bool PollNextOverlayEvent( VROverlayHandle_t ulOverlayHandle, VREvent_t *pEvent, uint32_t uncbVREvent ) = 0;
-
-		/** Returns the current input settings for the specified overlay. */
-		virtual EVROverlayError GetOverlayInputMethod( VROverlayHandle_t ulOverlayHandle, VROverlayInputMethod *peInputMethod ) = 0;
-
-		/** Sets the input settings for the specified overlay. */
-		virtual EVROverlayError SetOverlayInputMethod( VROverlayHandle_t ulOverlayHandle, VROverlayInputMethod eInputMethod ) = 0;
-
-		/** Gets the mouse scaling factor that is used for mouse events. The actual texture may be a different size, but this is
-		* typically the size of the underlying UI in pixels. */
-		virtual EVROverlayError GetOverlayMouseScale( VROverlayHandle_t ulOverlayHandle, HmdVector2_t *pvecMouseScale ) = 0;
-
-		/** Sets the mouse scaling factor that is used for mouse events. The actual texture may be a different size, but this is
-		* typically the size of the underlying UI in pixels (not in world space). */
-		virtual EVROverlayError SetOverlayMouseScale( VROverlayHandle_t ulOverlayHandle, const HmdVector2_t *pvecMouseScale ) = 0;
-
-		/** Computes the overlay-space pixel coordinates of where the ray intersects the overlay with the
-		* specified settings. Returns false if there is no intersection. */
-		virtual bool ComputeOverlayIntersection( VROverlayHandle_t ulOverlayHandle, const VROverlayIntersectionParams_t *pParams, VROverlayIntersectionResults_t *pResults ) = 0;
-
-		/** Processes mouse input from the specified controller as though it were a mouse pointed at a compositor overlay with the
-		* specified settings. The controller is treated like a laser pointer on the -z axis. The point where the laser pointer would
-		* intersect with the overlay is the mouse position, the trigger is left mouse, and the track pad is right mouse. 
-		*
-		* Return true if the controller is pointed at the overlay and an event was generated. */
-		virtual bool HandleControllerOverlayInteractionAsMouse( VROverlayHandle_t ulOverlayHandle, TrackedDeviceIndex_t unControllerDeviceIndex ) = 0;
-
-		/** Returns true if the specified overlay is the hover target. An overlay is the hover target when it is the last overlay "moused over" 
-		* by the virtual mouse pointer */
-		virtual bool IsHoverTargetOverlay( VROverlayHandle_t ulOverlayHandle ) = 0;
-
-		/** Returns the current Gamepad focus overlay */
-		virtual vr::VROverlayHandle_t GetGamepadFocusOverlay() = 0;
-
-		/** Sets the current Gamepad focus overlay */
-		virtual EVROverlayError SetGamepadFocusOverlay( VROverlayHandle_t ulNewFocusOverlay ) = 0;
-
-		/** Sets an overlay's neighbor. This will also set the neighbor of the "to" overlay
-		* to point back to the "from" overlay. If an overlay's neighbor is set to invalid both
-		* ends will be cleared */
-		virtual EVROverlayError SetOverlayNeighbor( EOverlayDirection eDirection, VROverlayHandle_t ulFrom, VROverlayHandle_t ulTo ) = 0;
-
-		/** Changes the Gamepad focus from one overlay to one of its neighbors. Returns VROverlayError_NoNeighbor if there is no
-		* neighbor in that direction */
-		virtual EVROverlayError MoveGamepadFocusToNeighbor( EOverlayDirection eDirection, VROverlayHandle_t ulFrom ) = 0;
-
-		// ---------------------------------------------
-		// Overlay texture methods
-		// ---------------------------------------------
-
-		/** Texture to draw for the overlay. This function can only be called by the overlay's creator or renderer process (see SetOverlayRenderingPid) .
-		*
-		* OpenGL dirty state:
-		*	glBindTexture
-		*/
-		virtual EVROverlayError SetOverlayTexture( VROverlayHandle_t ulOverlayHandle, const Texture_t *pTexture ) = 0;
-
-		/** Use this to tell the overlay system to release the texture set for this overlay. */
-		virtual EVROverlayError ClearOverlayTexture( VROverlayHandle_t ulOverlayHandle ) = 0;
-
-		/** Separate interface for providing the data as a stream of bytes, but there is an upper bound on data 
-		* that can be sent. This function can only be called by the overlay's renderer process. */
-		virtual EVROverlayError SetOverlayRaw( VROverlayHandle_t ulOverlayHandle, void *pvBuffer, uint32_t unWidth, uint32_t unHeight, uint32_t unDepth ) = 0;
-
-		/** Separate interface for providing the image through a filename: can be png or jpg, and should not be bigger than 1920x1080.
-		* This function can only be called by the overlay's renderer process */
-		virtual EVROverlayError SetOverlayFromFile( VROverlayHandle_t ulOverlayHandle, const char *pchFilePath ) = 0;
-
-		/** Get the native texture handle/device for an overlay you have created.
-		* On windows this handle will be a ID3D11ShaderResourceView with a ID3D11Texture2D bound.
-		*
-		* The texture will always be sized to match the backing texture you supplied in SetOverlayTexture above.
-		*
-		* You MUST call ReleaseNativeOverlayHandle() with pNativeTextureHandle once you are done with this texture.
-		*
-		* pNativeTextureHandle is an OUTPUT, it will be a pointer to a ID3D11ShaderResourceView *.
-		* pNativeTextureRef is an INPUT and should be a ID3D11Resource *. The device used by pNativeTextureRef will be used to bind pNativeTextureHandle.
-		*/
-		virtual EVROverlayError GetOverlayTexture( VROverlayHandle_t ulOverlayHandle, void **pNativeTextureHandle, void *pNativeTextureRef, uint32_t *pWidth, uint32_t *pHeight, uint32_t *pNativeFormat, EGraphicsAPIConvention *pAPI, EColorSpace *pColorSpace ) = 0;
-
-		/** Release the pNativeTextureHandle provided from the GetOverlayTexture call, this allows the system to free the underlying GPU resources for this object,
-		* so only do it once you stop rendering this texture.
-		*/
-		virtual EVROverlayError ReleaseNativeOverlayHandle( VROverlayHandle_t ulOverlayHandle, void *pNativeTextureHandle ) = 0;
-
-		/** Get the size of the overlay texture */
-		virtual EVROverlayError GetOverlayTextureSize( VROverlayHandle_t ulOverlayHandle, uint32_t *pWidth, uint32_t *pHeight ) = 0;
-
-		// ----------------------------------------------
-		// Dashboard Overlay Methods
-		// ----------------------------------------------
-
-		/** Creates a dashboard overlay and returns its handle */
-		virtual EVROverlayError CreateDashboardOverlay( const char *pchOverlayKey, const char *pchOverlayFriendlyName, VROverlayHandle_t * pMainHandle, VROverlayHandle_t *pThumbnailHandle ) = 0;
-
-		/** Returns true if the dashboard is visible */
-		virtual bool IsDashboardVisible() = 0;
-
-		/** returns true if the dashboard is visible and the specified overlay is the active system Overlay */
-		virtual bool IsActiveDashboardOverlay( VROverlayHandle_t ulOverlayHandle ) = 0;
-
-		/** Sets the dashboard overlay to only appear when the specified process ID has scene focus */
-		virtual EVROverlayError SetDashboardOverlaySceneProcess( VROverlayHandle_t ulOverlayHandle, uint32_t unProcessId ) = 0;
-
-		/** Gets the process ID that this dashboard overlay requires to have scene focus */
-		virtual EVROverlayError GetDashboardOverlaySceneProcess( VROverlayHandle_t ulOverlayHandle, uint32_t *punProcessId ) = 0;
-
-		/** Shows the dashboard. */
-		virtual void ShowDashboard( const char *pchOverlayToShow ) = 0;
-
-		/** Returns the tracked device that has the laser pointer in the dashboard */
-		virtual vr::TrackedDeviceIndex_t GetPrimaryDashboardDevice() = 0;
-
-		// ---------------------------------------------
-		// Keyboard methods
-		// ---------------------------------------------
-		
-		/** Show the virtual keyboard to accept input **/
-		virtual EVROverlayError ShowKeyboard( EGamepadTextInputMode eInputMode, EGamepadTextInputLineMode eLineInputMode, const char *pchDescription, uint32_t unCharMax, const char *pchExistingText, bool bUseMinimalMode, uint64_t uUserValue ) = 0;
-
-		virtual EVROverlayError ShowKeyboardForOverlay( VROverlayHandle_t ulOverlayHandle, EGamepadTextInputMode eInputMode, EGamepadTextInputLineMode eLineInputMode, const char *pchDescription, uint32_t unCharMax, const char *pchExistingText, bool bUseMinimalMode, uint64_t uUserValue ) = 0;
-
-		/** Get the text that was entered into the text input **/
-		virtual uint32_t GetKeyboardText( VR_OUT_STRING() char *pchText, uint32_t cchText ) = 0;
-
-		/** Hide the virtual keyboard **/
-		virtual void HideKeyboard() = 0;
-
-		/** Set the position of the keyboard in world space **/
-		virtual void SetKeyboardTransformAbsolute( ETrackingUniverseOrigin eTrackingOrigin, const HmdMatrix34_t *pmatTrackingOriginToKeyboardTransform ) = 0;
-
-		/** Set the position of the keyboard in overlay space by telling it to avoid a rectangle in the overlay. Rectangle coords have (0,0) in the bottom left **/
-		virtual void SetKeyboardPositionForOverlay( VROverlayHandle_t ulOverlayHandle, HmdRect2_t avoidRect ) = 0;
-
-	};
-
-	static const char * const IVROverlay_Version = "IVROverlay_013";
-
-} // namespace vr
-
-// ivrrendermodels.h
-namespace vr
-{
-
-static const char * const k_pch_Controller_Component_GDC2015 = "gdc2015";   // Canonical coordinate system of the gdc 2015 wired controller, provided for backwards compatibility
-static const char * const k_pch_Controller_Component_Base = "base";         // For controllers with an unambiguous 'base'.
-static const char * const k_pch_Controller_Component_Tip = "tip";           // For controllers with an unambiguous 'tip' (used for 'laser-pointing')
-static const char * const k_pch_Controller_Component_HandGrip = "handgrip"; // Neutral, ambidextrous hand-pose when holding controller. On plane between neutrally posed index finger and thumb
-static const char * const k_pch_Controller_Component_Status = "status";		// 1:1 aspect ratio status area, with canonical [0,1] uv mapping
-
-#if defined(__linux__) || defined(__APPLE__) 
-// The 32-bit version of gcc has the alignment requirement for uint64 and double set to
-// 4 meaning that even with #pragma pack(8) these types will only be four-byte aligned.
-// The 64-bit version of gcc has the alignment requirement for these types set to
-// 8 meaning that unless we use #pragma pack(4) our structures will get bigger.
-// The 64-bit structure packing has to match the 32-bit structure packing for each platform.
-#pragma pack( push, 4 )
-#else
-#pragma pack( push, 8 )
-#endif
-
-/** Errors that can occur with the VR compositor */
-enum EVRRenderModelError
-{
-	VRRenderModelError_None = 0,
-	VRRenderModelError_Loading = 100,
-	VRRenderModelError_NotSupported = 200,
-	VRRenderModelError_InvalidArg = 300,
-	VRRenderModelError_InvalidModel = 301,
-	VRRenderModelError_NoShapes = 302,
-	VRRenderModelError_MultipleShapes = 303,
-	VRRenderModelError_TooManyVertices = 304,
-	VRRenderModelError_MultipleTextures = 305,
-	VRRenderModelError_BufferTooSmall = 306,
-	VRRenderModelError_NotEnoughNormals = 307,
-	VRRenderModelError_NotEnoughTexCoords = 308,
-
-	VRRenderModelError_InvalidTexture = 400,
-};
-
-typedef uint32_t VRComponentProperties;
-
-enum EVRComponentProperty
-{
-	VRComponentProperty_IsStatic = (1 << 0),
-	VRComponentProperty_IsVisible = (1 << 1),
-	VRComponentProperty_IsTouched = (1 << 2),
-	VRComponentProperty_IsPressed = (1 << 3),
-	VRComponentProperty_IsScrolled = (1 << 4),
-};
-
-/** Describes state information about a render-model component, including transforms and other dynamic properties */
-struct RenderModel_ComponentState_t
-{
-	HmdMatrix34_t mTrackingToComponentRenderModel;  // Transform required when drawing the component render model
-	HmdMatrix34_t mTrackingToComponentLocal;        // Transform available for attaching to a local component coordinate system (-Z out from surface )
-	VRComponentProperties uProperties;
-};
-
-/** A single vertex in a render model */
-struct RenderModel_Vertex_t
-{
-	HmdVector3_t vPosition;		// position in meters in device space
-	HmdVector3_t vNormal;
-	float rfTextureCoord[2];
-};
-
-/** A texture map for use on a render model */
-struct RenderModel_TextureMap_t
-{
-	uint16_t unWidth, unHeight; // width and height of the texture map in pixels
-	const uint8_t *rubTextureMapData;	// Map texture data. All textures are RGBA with 8 bits per channel per pixel. Data size is width * height * 4ub
-};
-
-/**  Session unique texture identifier. Rendermodels which share the same texture will have the same id.
-IDs <0 denote the texture is not present */
-
-typedef int32_t TextureID_t;
-
-const TextureID_t INVALID_TEXTURE_ID = -1;
-
-struct RenderModel_t
-{
-	const RenderModel_Vertex_t *rVertexData;	// Vertex data for the mesh
-	uint32_t unVertexCount;						// Number of vertices in the vertex data
-	const uint16_t *rIndexData;					// Indices into the vertex data for each triangle
-	uint32_t unTriangleCount;					// Number of triangles in the mesh. Index count is 3 * TriangleCount
-	TextureID_t diffuseTextureId;				// Session unique texture identifier. Rendermodels which share the same texture will have the same id. <0 == texture not present
-};
-
-struct RenderModel_ControllerMode_State_t
-{
-	bool bScrollWheelVisible; // is this controller currently set to be in a scroll wheel mode
-};
-
-#pragma pack( pop )
-
-class IVRRenderModels
-{
-public:
-
-	/** Loads and returns a render model for use in the application. pchRenderModelName should be a render model name
-	* from the Prop_RenderModelName_String property or an absolute path name to a render model on disk. 
-	*
-	* The resulting render model is valid until VR_Shutdown() is called or until FreeRenderModel() is called. When the 
-	* application is finished with the render model it should call FreeRenderModel() to free the memory associated
-	* with the model.
-	*
-	* The method returns VRRenderModelError_Loading while the render model is still being loaded.
-	* The method returns VRRenderModelError_None once loaded successfully, otherwise will return an error. */
-	virtual EVRRenderModelError LoadRenderModel_Async( const char *pchRenderModelName, RenderModel_t **ppRenderModel ) = 0;
-
-	/** Frees a previously returned render model
-	*   It is safe to call this on a null ptr. */
-	virtual void FreeRenderModel( RenderModel_t *pRenderModel ) = 0;
-
-	/** Loads and returns a texture for use in the application. */
-	virtual EVRRenderModelError LoadTexture_Async( TextureID_t textureId, RenderModel_TextureMap_t **ppTexture ) = 0;
-
-	/** Frees a previously returned texture
-	*   It is safe to call this on a null ptr. */
-	virtual void FreeTexture( RenderModel_TextureMap_t *pTexture ) = 0;
-
-	/** Creates a D3D11 texture and loads data into it. */
-	virtual EVRRenderModelError LoadTextureD3D11_Async( TextureID_t textureId, void *pD3D11Device, void **ppD3D11Texture2D ) = 0;
-
-	/** Helper function to copy the bits into an existing texture. */
-	virtual EVRRenderModelError LoadIntoTextureD3D11_Async( TextureID_t textureId, void *pDstTexture ) = 0;
-
-	/** Use this to free textures created with LoadTextureD3D11_Async instead of calling Release on them. */
-	virtual void FreeTextureD3D11( void *pD3D11Texture2D ) = 0;
-
-	/** Use this to get the names of available render models.  Index does not correlate to a tracked device index, but
-	* is only used for iterating over all available render models.  If the index is out of range, this function will return 0.
-	* Otherwise, it will return the size of the buffer required for the name. */
-	virtual uint32_t GetRenderModelName( uint32_t unRenderModelIndex, VR_OUT_STRING() char *pchRenderModelName, uint32_t unRenderModelNameLen ) = 0;
-
-	/** Returns the number of available render models. */
-	virtual uint32_t GetRenderModelCount() = 0;
-
-
-	/** Returns the number of components of the specified render model.
-	*  Components are useful when client application wish to draw, label, or otherwise interact with components of tracked objects.
-	*  Examples controller components:
-	*   renderable things such as triggers, buttons
-	*   non-renderable things which include coordinate systems such as 'tip', 'base', a neutral controller agnostic hand-pose
-	*   If all controller components are enumerated and rendered, it will be equivalent to drawing the traditional render model
-	*   Returns 0 if components not supported, >0 otherwise */
-	virtual uint32_t GetComponentCount( const char *pchRenderModelName ) = 0;
-
-	/** Use this to get the names of available components.  Index does not correlate to a tracked device index, but
-	* is only used for iterating over all available components.  If the index is out of range, this function will return 0.
-	* Otherwise, it will return the size of the buffer required for the name. */
-	virtual uint32_t GetComponentName( const char *pchRenderModelName, uint32_t unComponentIndex, VR_OUT_STRING( ) char *pchComponentName, uint32_t unComponentNameLen ) = 0;
-
-	/** Get the button mask for all buttons associated with this component
-	*   If no buttons (or axes) are associated with this component, return 0
-	*   Note: multiple components may be associated with the same button. Ex: two grip buttons on a single controller.
-	*   Note: A single component may be associated with multiple buttons. Ex: A trackpad which also provides "D-pad" functionality */
-	virtual uint64_t GetComponentButtonMask( const char *pchRenderModelName, const char *pchComponentName ) = 0;
-
-	/** Use this to get the render model name for the specified rendermode/component combination, to be passed to LoadRenderModel.
-	* If the component name is out of range, this function will return 0.
-	* Otherwise, it will return the size of the buffer required for the name. */
-	virtual uint32_t GetComponentRenderModelName( const char *pchRenderModelName, const char *pchComponentName, VR_OUT_STRING( ) char *pchComponentRenderModelName, uint32_t unComponentRenderModelNameLen ) = 0;
-
-	/** Use this to query information about the component, as a function of the controller state.
-	*
-	* For dynamic controller components (ex: trigger) values will reflect component motions
-	* For static components this will return a consistent value independent of the VRControllerState_t
-	*
-	* If the pchRenderModelName or pchComponentName is invalid, this will return false (and transforms will be set to identity).
-	* Otherwise, return true
-	* Note: For dynamic objects, visibility may be dynamic. (I.e., true/false will be returned based on controller state and controller mode state ) */
-	virtual bool GetComponentState( const char *pchRenderModelName, const char *pchComponentName, const vr::VRControllerState_t *pControllerState, const RenderModel_ControllerMode_State_t *pState, RenderModel_ComponentState_t *pComponentState ) = 0;
-
-	/** Returns true if the render model has a component with the specified name */
-	virtual bool RenderModelHasComponent( const char *pchRenderModelName, const char *pchComponentName ) = 0;
-
-	/** Returns the URL of the thumbnail image for this rendermodel */
-	virtual uint32_t GetRenderModelThumbnailURL( const char *pchRenderModelName, VR_OUT_STRING() char *pchThumbnailURL, uint32_t unThumbnailURLLen, vr::EVRRenderModelError *peError ) = 0;
-
-	/** Provides a render model path that will load the unskinned model if the model name provided has been replace by the user. If the model
-	* hasn't been replaced the path value will still be a valid path to load the model. Pass this to LoadRenderModel_Async, etc. to load the
-	* model. */
-	virtual uint32_t GetRenderModelOriginalPath( const char *pchRenderModelName, VR_OUT_STRING() char *pchOriginalPath, uint32_t unOriginalPathLen, vr::EVRRenderModelError *peError ) = 0;
-
-	/** Returns a string for a render model error */
-	virtual const char *GetRenderModelErrorNameFromEnum( vr::EVRRenderModelError error ) = 0;
-};
-
-static const char * const IVRRenderModels_Version = "IVRRenderModels_005";
-
-}
-
-
-// ivrextendeddisplay.h
-namespace vr
-{
-
-	/** NOTE: Use of this interface is not recommended in production applications. It will not work for displays which use
-	* direct-to-display mode. Creating our own window is also incompatible with the VR compositor and is not available when the compositor is running. */
-	class IVRExtendedDisplay
-	{
-	public:
-
-		/** Size and position that the window needs to be on the VR display. */
-		virtual void GetWindowBounds( int32_t *pnX, int32_t *pnY, uint32_t *pnWidth, uint32_t *pnHeight ) = 0;
-
-		/** Gets the viewport in the frame buffer to draw the output of the distortion into */
-		virtual void GetEyeOutputViewport( EVREye eEye, uint32_t *pnX, uint32_t *pnY, uint32_t *pnWidth, uint32_t *pnHeight ) = 0;
-
-		/** [D3D10/11 Only]
-		* Returns the adapter index and output index that the user should pass into EnumAdapters and EnumOutputs
-		* to create the device and swap chain in DX10 and DX11. If an error occurs both indices will be set to -1.
-		*/
-		virtual void GetDXGIOutputInfo( int32_t *pnAdapterIndex, int32_t *pnAdapterOutputIndex ) = 0;
-
-	};
-
-	static const char * const IVRExtendedDisplay_Version = "IVRExtendedDisplay_001";
-
-}
-
-
-// ivrtrackedcamera.h
-namespace vr
-{
-
-class IVRTrackedCamera
-{
-public:
-	/** Returns a string for an error */
-	virtual const char *GetCameraErrorNameFromEnum( vr::EVRTrackedCameraError eCameraError ) = 0;
-
-	/** For convenience, same as tracked property request Prop_HasCamera_Bool */
-	virtual vr::EVRTrackedCameraError HasCamera( vr::TrackedDeviceIndex_t nDeviceIndex, bool *pHasCamera ) = 0;
-
-	/** Gets size of the image frame. */
-	virtual vr::EVRTrackedCameraError GetCameraFrameSize( vr::TrackedDeviceIndex_t nDeviceIndex, vr::EVRTrackedCameraFrameType eFrameType, uint32_t *pnWidth, uint32_t *pnHeight, uint32_t *pnFrameBufferSize ) = 0;
-
-	virtual vr::EVRTrackedCameraError GetCameraIntrinisics( vr::TrackedDeviceIndex_t nDeviceIndex, vr::EVRTrackedCameraFrameType eFrameType, vr::HmdVector2_t *pFocalLength, vr::HmdVector2_t *pCenter ) = 0;
-
-	virtual vr::EVRTrackedCameraError GetCameraProjection( vr::TrackedDeviceIndex_t nDeviceIndex, vr::EVRTrackedCameraFrameType eFrameType, float flZNear, float flZFar, vr::HmdMatrix44_t *pProjection ) = 0;
-
-	/** Acquiring streaming service permits video streaming for the caller. Releasing hints the system that video services do not need to be maintained for this client.
-	* If the camera has not already been activated, a one time spin up may incur some auto exposure as well as initial streaming frame delays.
-	* The camera should be considered a global resource accessible for shared consumption but not exclusive to any caller.
-	* The camera may go inactive due to lack of active consumers or headset idleness. */
-	virtual vr::EVRTrackedCameraError AcquireVideoStreamingService( vr::TrackedDeviceIndex_t nDeviceIndex, vr::TrackedCameraHandle_t *pHandle ) = 0;
-	virtual vr::EVRTrackedCameraError ReleaseVideoStreamingService( vr::TrackedCameraHandle_t hTrackedCamera ) = 0;
-
-	/** Copies the image frame into a caller's provided buffer. The image data is currently provided as RGBA data, 4 bytes per pixel.
-	* A caller can provide null for the framebuffer or frameheader if not desired. Requesting the frame header first, followed by the frame buffer allows
-	* the caller to determine if the frame as advanced per the frame header sequence. 
-	* If there is no frame available yet, due to initial camera spinup or re-activation, the error will be VRTrackedCameraError_NoFrameAvailable.
-	* Ideally a caller should be polling at ~16ms intervals */
-	virtual vr::EVRTrackedCameraError GetVideoStreamFrameBuffer( vr::TrackedCameraHandle_t hTrackedCamera, vr::EVRTrackedCameraFrameType eFrameType, void *pFrameBuffer, uint32_t nFrameBufferSize, vr::CameraVideoStreamFrameHeader_t *pFrameHeader, uint32_t nFrameHeaderSize ) = 0;
-
-	/** Gets size of the image frame. */
-	virtual vr::EVRTrackedCameraError GetVideoStreamTextureSize( vr::TrackedDeviceIndex_t nDeviceIndex, vr::EVRTrackedCameraFrameType eFrameType, vr::VRTextureBounds_t *pTextureBounds, uint32_t *pnWidth, uint32_t *pnHeight ) = 0; 
-
-	/** Access a shared D3D11 texture for the specified tracked camera stream */
-	virtual vr::EVRTrackedCameraError GetVideoStreamTextureD3D11( vr::TrackedCameraHandle_t hTrackedCamera, vr::EVRTrackedCameraFrameType eFrameType, void *pD3D11DeviceOrResource, void **ppD3D11ShaderResourceView, vr::CameraVideoStreamFrameHeader_t *pFrameHeader, uint32_t nFrameHeaderSize ) = 0;
-
-	/** Access a shared GL texture for the specified tracked camera stream */
-	virtual vr::EVRTrackedCameraError GetVideoStreamTextureGL( vr::TrackedCameraHandle_t hTrackedCamera, vr::EVRTrackedCameraFrameType eFrameType, vr::glUInt_t *pglTextureId, vr::CameraVideoStreamFrameHeader_t *pFrameHeader, uint32_t nFrameHeaderSize ) = 0;
-	virtual vr::EVRTrackedCameraError ReleaseVideoStreamTextureGL( vr::TrackedCameraHandle_t hTrackedCamera, vr::glUInt_t glTextureId ) = 0;
-};
-
-static const char * const IVRTrackedCamera_Version = "IVRTrackedCamera_003";
-
-} // namespace vr
-
-
-// ivrscreenshots.h
-namespace vr
-{
-
-/** Errors that can occur with the VR compositor */
-enum EVRScreenshotError
-{
-	VRScreenshotError_None							= 0,
-	VRScreenshotError_RequestFailed					= 1,
-	VRScreenshotError_IncompatibleVersion			= 100,
-	VRScreenshotError_NotFound						= 101,
-	VRScreenshotError_BufferTooSmall				= 102,
-	VRScreenshotError_ScreenshotAlreadyInProgress	= 108,
-};
-
-/** Allows the application to generate screenshots */
-class IVRScreenshots
-{
-public:
-	/** Request a screenshot of the requested type.
-	 *  A request of the VRScreenshotType_Stereo type will always
-	 *  work. Other types will depend on the underlying application
-	 *  support.
-	 *  The first file name is for the preview image and should be a
-	 *  regular screenshot (ideally from the left eye). The second
-	 *  is the VR screenshot in the correct format. They should be
-	 *  in the same aspect ratio.  Formats per type:
-	 *  VRScreenshotType_Mono: the VR filename is ignored (can be
-	 *  nullptr), this is a normal flat single shot.
-	 *  VRScreenshotType_Stereo:  The VR image should be a
-	 *  side-by-side with the left eye image on the left.
-	 *  VRScreenshotType_Cubemap: The VR image should be six square
-	 *  images composited horizontally.
-	 *  VRScreenshotType_StereoPanorama: above/below with left eye
-	 *  panorama being the above image.  Image is typically square
-	 *  with the panorama being 2x horizontal.
-	 *  
-	 *  Note that the VR dashboard will call this function when
-	 *  the user presses the screenshot binding (currently System
-	 *  Button + Trigger).  If Steam is running, the destination
-	 *  file names will be in %TEMP% and will be copied into
-	 *  Steam's screenshot library for the running application
-	 *  once SubmitScreenshot() is called.
-	 *  If Steam is not running, the paths will be in the user's
-	 *  documents folder under Documents\SteamVR\Screenshots.
-	 *  Other VR applications can call this to initate a
-	 *  screenshot outside of user control.
-	 *  The destination file names do not need an extension,
-	 *  will be replaced with the correct one for the format
-	 *  which is currently .png. */
-	virtual vr::EVRScreenshotError RequestScreenshot( vr::ScreenshotHandle_t *pOutScreenshotHandle, vr::EVRScreenshotType type, const char *pchPreviewFilename, const char *pchVRFilename ) = 0;
-
-	/** Called by the running VR application to indicate that it
-	 *  wishes to be in charge of screenshots.  If the
-	 *  application does not call this, the Compositor will only
-	 *  support VRScreenshotType_Stereo screenshots that will be
-	 *  captured without notification to the running app.
-	 *  Once hooked your application will receive a
-	 *  VREvent_RequestScreenshot event when the user presses the
-	 *  buttons to take a screenshot. */
-	virtual vr::EVRScreenshotError HookScreenshot( VR_ARRAY_COUNT( numTypes ) const vr::EVRScreenshotType *pSupportedTypes, int numTypes ) = 0;
-
-	/** When your application receives a
-	 *  VREvent_RequestScreenshot event, call these functions to get
-	 *  the details of the screenshot request. */
-	virtual vr::EVRScreenshotType GetScreenshotPropertyType( vr::ScreenshotHandle_t screenshotHandle, vr::EVRScreenshotError *pError ) = 0;
-
-	/** Get the filename for the preview or vr image (see
-	 *  vr::EScreenshotPropertyFilenames).  The return value is
-	 *  the size of the string.   */
- 	virtual uint32_t GetScreenshotPropertyFilename( vr::ScreenshotHandle_t screenshotHandle, vr::EVRScreenshotPropertyFilenames filenameType, VR_OUT_STRING() char *pchFilename, uint32_t cchFilename, vr::EVRScreenshotError *pError ) = 0;
-
-	/** Call this if the application is taking the screen shot
-	 *  will take more than a few ms processing. This will result
-	 *  in an overlay being presented that shows a completion
-	 *  bar. */
-	virtual vr::EVRScreenshotError UpdateScreenshotProgress( vr::ScreenshotHandle_t screenshotHandle, float flProgress ) = 0;
-
-	/** Tells the compositor to take an internal screenshot of
-	 *  type VRScreenshotType_Stereo. It will take the current
-	 *  submitted scene textures of the running application and
-	 *  write them into the preview image and a side-by-side file
-	 *  for the VR image.
-	 *  This is similiar to request screenshot, but doesn't ever
-	 *  talk to the application, just takes the shot and submits. */
-	virtual vr::EVRScreenshotError TakeStereoScreenshot( vr::ScreenshotHandle_t *pOutScreenshotHandle, const char *pchPreviewFilename, const char *pchVRFilename ) = 0;
-
-	/** Submit the completed screenshot.  If Steam is running
-	 *  this will call into the Steam client and upload the
-	 *  screenshot to the screenshots section of the library for
-	 *  the running application.  If Steam is not running, this
-	 *  function will display a notification to the user that the
-	 *  screenshot was taken. The paths should be full paths with
-	 *  extensions.
-	 *  File paths should be absolute including
-	 *  exntensions.
-	 *  screenshotHandle can be k_unScreenshotHandleInvalid if this
-	 *  was a new shot taking by the app to be saved and not
-	 *  initiated by a user (achievement earned or something) */
-	virtual vr::EVRScreenshotError SubmitScreenshot( vr::ScreenshotHandle_t screenshotHandle, vr::EVRScreenshotType type, const char *pchSourcePreviewFilename, const char *pchSourceVRFilename ) = 0;
-};
-
-static const char * const IVRScreenshots_Version = "IVRScreenshots_001";
-
-} // namespace vr
-
-
-
-// ivrresources.h
-namespace vr
-{
-
-class IVRResources
-{
-public:
-
-	// ------------------------------------
-	// Shared Resource Methods
-	// ------------------------------------
-
-	/** Loads the specified resource into the provided buffer if large enough.
-	* Returns the size in bytes of the buffer required to hold the specified resource. */
-	virtual uint32_t LoadSharedResource( const char *pchResourceName, char *pchBuffer, uint32_t unBufferLen ) = 0;
-
-	/** Provides the full path to the specified resource. Resource names can include named directories for
-	* drivers and other things, and this resolves all of those and returns the actual physical path. 
-	* pchResourceTypeDirectory is the subdirectory of resources to look in. */
-	virtual uint32_t GetResourceFullPath( const char *pchResourceName, const char *pchResourceTypeDirectory, char *pchPathBuffer, uint32_t unBufferLen ) = 0;
-};
-
-static const char * const IVRResources_Version = "IVRResources_001";
-
-
-}// End
-
-#endif // _OPENVR_API
-
-
-namespace vr
-{
-	/** Finds the active installation of the VR API and initializes it. The provided path must be absolute
-	* or relative to the current working directory. These are the local install versions of the equivalent
-	* functions in steamvr.h and will work without a local Steam install.
-	*
-	* This path is to the "root" of the VR API install. That's the directory with
-	* the "drivers" directory and a platform (i.e. "win32") directory in it, not the directory with the DLL itself.
-	*/
-	inline IVRSystem *VR_Init( EVRInitError *peError, EVRApplicationType eApplicationType );
-
-	/** unloads vrclient.dll. Any interface pointers from the interface are
-	* invalid after this point */
-	inline void VR_Shutdown();
-
-	/** Returns true if there is an HMD attached. This check is as lightweight as possible and
-	* can be called outside of VR_Init/VR_Shutdown. It should be used when an application wants
-	* to know if initializing VR is a possibility but isn't ready to take that step yet.
-	*/
-	VR_INTERFACE bool VR_CALLTYPE VR_IsHmdPresent();
-
-	/** Returns true if the OpenVR runtime is installed. */
-	VR_INTERFACE bool VR_CALLTYPE VR_IsRuntimeInstalled();
-
-	/** Returns where the OpenVR runtime is installed. */
-	VR_INTERFACE const char *VR_CALLTYPE VR_RuntimePath();
-
-	/** Returns the name of the enum value for an EVRInitError. This function may be called outside of VR_Init()/VR_Shutdown(). */
-	VR_INTERFACE const char *VR_CALLTYPE VR_GetVRInitErrorAsSymbol( EVRInitError error );
-
-	/** Returns an english string for an EVRInitError. Applications should call VR_GetVRInitErrorAsSymbol instead and
-	* use that as a key to look up their own localized error message. This function may be called outside of VR_Init()/VR_Shutdown(). */
-	VR_INTERFACE const char *VR_CALLTYPE VR_GetVRInitErrorAsEnglishDescription( EVRInitError error );
-
-	/** Returns the interface of the specified version. This method must be called after VR_Init. The
-	* pointer returned is valid until VR_Shutdown is called.
-	*/
-	VR_INTERFACE void *VR_CALLTYPE VR_GetGenericInterface( const char *pchInterfaceVersion, EVRInitError *peError );
-
-	/** Returns whether the interface of the specified version exists.
-	*/
-	VR_INTERFACE bool VR_CALLTYPE VR_IsInterfaceVersionValid( const char *pchInterfaceVersion );
-
-	/** Returns a token that represents whether the VR interface handles need to be reloaded */
-	VR_INTERFACE uint32_t VR_CALLTYPE VR_GetInitToken();
-
-	// These typedefs allow old enum names from SDK 0.9.11 to be used in applications.
-	// They will go away in the future.
-	typedef EVRInitError HmdError;
-	typedef EVREye Hmd_Eye;
-	typedef EGraphicsAPIConvention GraphicsAPIConvention;
-	typedef EColorSpace ColorSpace;
-	typedef ETrackingResult HmdTrackingResult;
-	typedef ETrackedDeviceClass TrackedDeviceClass;
-	typedef ETrackingUniverseOrigin TrackingUniverseOrigin;
-	typedef ETrackedDeviceProperty TrackedDeviceProperty;
-	typedef ETrackedPropertyError TrackedPropertyError;
-	typedef EVRSubmitFlags VRSubmitFlags_t;
-	typedef EVRState VRState_t;
-	typedef ECollisionBoundsStyle CollisionBoundsStyle_t;
-	typedef EVROverlayError VROverlayError;
-	typedef EVRFirmwareError VRFirmwareError;
-	typedef EVRCompositorError VRCompositorError;
-	typedef EVRScreenshotError VRScreenshotsError;
-
-	inline uint32_t &VRToken()
-	{
-		static uint32_t token;
-		return token;
-	}
-
-	class COpenVRContext
-	{
-	public:
-		COpenVRContext() { Clear(); }
-		void Clear();
-
-		inline void CheckClear()
-		{
-			if ( VRToken() != VR_GetInitToken() )
-			{
-				Clear();
-				VRToken() = VR_GetInitToken();
-			}
-		}
-
-		IVRSystem *VRSystem()
-		{
-			CheckClear();
-			if ( m_pVRSystem == nullptr )
-			{
-				EVRInitError eError;
-				m_pVRSystem = ( IVRSystem * )VR_GetGenericInterface( IVRSystem_Version, &eError );
-			}
-			return m_pVRSystem;
-		}
-		IVRChaperone *VRChaperone()
-		{
-			CheckClear();
-			if ( m_pVRChaperone == nullptr )
-			{
-				EVRInitError eError;
-				m_pVRChaperone = ( IVRChaperone * )VR_GetGenericInterface( IVRChaperone_Version, &eError );
-			}
-			return m_pVRChaperone;
-		}
-
-		IVRChaperoneSetup *VRChaperoneSetup()
-		{
-			CheckClear();
-			if ( m_pVRChaperoneSetup == nullptr )
-			{
-				EVRInitError eError;
-				m_pVRChaperoneSetup = ( IVRChaperoneSetup * )VR_GetGenericInterface( IVRChaperoneSetup_Version, &eError );
-			}
-			return m_pVRChaperoneSetup;
-		}
-
-		IVRCompositor *VRCompositor()
-		{
-			CheckClear();
-			if ( m_pVRCompositor == nullptr )
-			{
-				EVRInitError eError;
-				m_pVRCompositor = ( IVRCompositor * )VR_GetGenericInterface( IVRCompositor_Version, &eError );
-			}
-			return m_pVRCompositor;
-		}
-
-		IVROverlay *VROverlay()
-		{
-			CheckClear();
-			if ( m_pVROverlay == nullptr )
-			{
-				EVRInitError eError;
-				m_pVROverlay = ( IVROverlay * )VR_GetGenericInterface( IVROverlay_Version, &eError );
-			}
-			return m_pVROverlay;
-		}
-
-		IVRResources *VRResources()
-		{
-			CheckClear();
-			if ( m_pVRResources == nullptr )
-			{
-				EVRInitError eError;
-				m_pVRResources = (IVRResources *)VR_GetGenericInterface( IVRResources_Version, &eError );
-			}
-			return m_pVRResources;
-		}
-
-		IVRScreenshots *VRScreenshots()
-		{
-			CheckClear();
-			if ( m_pVRScreenshots == nullptr )
-			{
-				EVRInitError eError;
-				m_pVRScreenshots = ( IVRScreenshots * )VR_GetGenericInterface( IVRScreenshots_Version, &eError );
-			}
-			return m_pVRScreenshots;
-		}
-
-		IVRRenderModels *VRRenderModels()
-		{
-			CheckClear();
-			if ( m_pVRRenderModels == nullptr )
-			{
-				EVRInitError eError;
-				m_pVRRenderModels = ( IVRRenderModels * )VR_GetGenericInterface( IVRRenderModels_Version, &eError );
-			}
-			return m_pVRRenderModels;
-		}
-
-		IVRExtendedDisplay *VRExtendedDisplay()
-		{
-			CheckClear();
-			if ( m_pVRExtendedDisplay == nullptr )
-			{
-				EVRInitError eError;
-				m_pVRExtendedDisplay = ( IVRExtendedDisplay * )VR_GetGenericInterface( IVRExtendedDisplay_Version, &eError );
-			}
-			return m_pVRExtendedDisplay;
-		}
-
-		IVRSettings *VRSettings()
-		{
-			CheckClear();
-			if ( m_pVRSettings == nullptr )
-			{
-				EVRInitError eError;
-				m_pVRSettings = ( IVRSettings * )VR_GetGenericInterface( IVRSettings_Version, &eError );
-			}
-			return m_pVRSettings;
-		}
-
-		IVRApplications *VRApplications()
-		{
-			CheckClear();
-			if ( m_pVRApplications == nullptr )
-			{
-				EVRInitError eError;
-				m_pVRApplications = ( IVRApplications * )VR_GetGenericInterface( IVRApplications_Version, &eError );
-			}
-			return m_pVRApplications;
-		}
-
-		IVRTrackedCamera *VRTrackedCamera()
-		{
-			CheckClear();
-			if ( m_pVRTrackedCamera == nullptr )
-			{
-				EVRInitError eError;
-				m_pVRTrackedCamera = ( IVRTrackedCamera * )VR_GetGenericInterface( IVRTrackedCamera_Version, &eError );
-			}
-			return m_pVRTrackedCamera;
-		}
-
-	private:
-		IVRSystem			*m_pVRSystem;
-		IVRChaperone		*m_pVRChaperone;
-		IVRChaperoneSetup	*m_pVRChaperoneSetup;
-		IVRCompositor		*m_pVRCompositor;
-		IVROverlay			*m_pVROverlay;
-		IVRResources		*m_pVRResources;
-		IVRRenderModels		*m_pVRRenderModels;
-		IVRExtendedDisplay	*m_pVRExtendedDisplay;
-		IVRSettings			*m_pVRSettings;
-		IVRApplications		*m_pVRApplications;
-		IVRTrackedCamera	*m_pVRTrackedCamera;
-		IVRScreenshots		*m_pVRScreenshots;
-	};
-
-	inline COpenVRContext &OpenVRInternal_ModuleContext()
-	{
-		static void *ctx[ sizeof( COpenVRContext ) / sizeof( void * ) ];
-		return *( COpenVRContext * )ctx; // bypass zero-init constructor
-	}
-
-	inline IVRSystem *VR_CALLTYPE VRSystem() { return OpenVRInternal_ModuleContext().VRSystem(); }
-	inline IVRChaperone *VR_CALLTYPE VRChaperone() { return OpenVRInternal_ModuleContext().VRChaperone(); }
-	inline IVRChaperoneSetup *VR_CALLTYPE VRChaperoneSetup() { return OpenVRInternal_ModuleContext().VRChaperoneSetup(); }
-	inline IVRCompositor *VR_CALLTYPE VRCompositor() { return OpenVRInternal_ModuleContext().VRCompositor(); }
-	inline IVROverlay *VR_CALLTYPE VROverlay() { return OpenVRInternal_ModuleContext().VROverlay(); }
-	inline IVRScreenshots *VR_CALLTYPE VRScreenshots() { return OpenVRInternal_ModuleContext().VRScreenshots(); }
-	inline IVRRenderModels *VR_CALLTYPE VRRenderModels() { return OpenVRInternal_ModuleContext().VRRenderModels(); }
-	inline IVRApplications *VR_CALLTYPE VRApplications() { return OpenVRInternal_ModuleContext().VRApplications(); }
-	inline IVRSettings *VR_CALLTYPE VRSettings() { return OpenVRInternal_ModuleContext().VRSettings(); }
-	inline IVRResources *VR_CALLTYPE VRResources() { return OpenVRInternal_ModuleContext().VRResources(); }
-	inline IVRExtendedDisplay *VR_CALLTYPE VRExtendedDisplay() { return OpenVRInternal_ModuleContext().VRExtendedDisplay(); }
-	inline IVRTrackedCamera *VR_CALLTYPE VRTrackedCamera() { return OpenVRInternal_ModuleContext().VRTrackedCamera(); }
-
-	inline void COpenVRContext::Clear()
-	{
-		m_pVRSystem = nullptr;
-		m_pVRChaperone = nullptr;
-		m_pVRChaperoneSetup = nullptr;
-		m_pVRCompositor = nullptr;
-		m_pVROverlay = nullptr;
-		m_pVRRenderModels = nullptr;
-		m_pVRExtendedDisplay = nullptr;
-		m_pVRSettings = nullptr;
-		m_pVRApplications = nullptr;
-		m_pVRTrackedCamera = nullptr;
-		m_pVRResources = nullptr;
-		m_pVRScreenshots = nullptr;
-	}
-
-	VR_INTERFACE uint32_t VR_CALLTYPE VR_InitInternal( EVRInitError *peError, EVRApplicationType eApplicationType );
-	VR_INTERFACE void VR_CALLTYPE VR_ShutdownInternal();
-
-	/** Finds the active installation of vrclient.dll and initializes it */
-	inline IVRSystem *VR_Init( EVRInitError *peError, EVRApplicationType eApplicationType )
-	{
-		IVRSystem *pVRSystem = nullptr;
-
-		EVRInitError eError;
-		VRToken() = VR_InitInternal( &eError, eApplicationType );
-		COpenVRContext &ctx = OpenVRInternal_ModuleContext();
-		ctx.Clear();
-
-		if ( eError == VRInitError_None )
-		{
-			if ( VR_IsInterfaceVersionValid( IVRSystem_Version ) )
-			{
-				pVRSystem = VRSystem();
-			}
-			else
-			{
-				VR_ShutdownInternal();
-				eError = VRInitError_Init_InterfaceNotFound;
-			}
-		}
-
-		if ( peError )
-			*peError = eError;
-		return pVRSystem;
-	}
-
-	/** unloads vrclient.dll. Any interface pointers from the interface are
-	* invalid after this point */
-	inline void VR_Shutdown()
-	{
-		VR_ShutdownInternal();
-	}
-}