# OpenVR SDK 2.5.1

Clients:
 * Include Transfer Time in Frame Timing, when using Steam Link

Drivers:
 * Include HMD Pose Prediction Time
 * Adjust behavior for GetFrameTiming
 * Add IVRIPCResourceManagerClient for Linux

[git-p4: depot-paths = "//vr/steamvr/sdk_release/": change = 8791766]

Author: charleslvalve

bin/linux32/libopenvr_api.so

@@ -42,8 +42,18 @@
 #include <stdlib.h>
 #include <assert.h>
 
-#include "../headers/openvr.h"
-#include "openvr_capi.h"
+#include "openvr.h"
+#include "ivrsystem.h"
+#include "ivrchaperone.h"
+#include "ivrchaperonesetup.h"
+#include "ivrcompositor.h"
+#include "ivroverlay.h"
+#include "ivrrendermodels.h"
+#include "ivrnotifications.h"
+#include "ivrblockqueue.h"
+
+#include "../vrclient/interface_adapters_client.h"
+#include "_dynamic_openvr_api_flat.h"
 
 class FnTableRegistration
 {
@@ -67,7 +77,12 @@ class FnTableRegistration
 
 import json
 import sys
-with open('../headers/openvr_api.json') as data_file:
+
+if len(sys.argv) != 2:
+	sys.exit(-1);
+json_path = sys.argv[1]
+
+with open(json_path) as data_file:
 	data = json.load(data_file)
 
 import api_shared

bin/linux32/libopenvr_api.so.dbg

@@ -77,9 +77,11 @@
 #endif
 """)
 
+if len(sys.argv) != 2:
+	sys.exit(-1);
+json_path = sys.argv[1]
 
-
-data = api_shared.loadfile('../headers/openvr_api.json', 'vr')
+data = api_shared.loadfile(json_path, 'vr')
 converttype = api_shared.converttype
 striparraysuffix = api_shared.striparraysuffix
 structlist = api_shared.structlist

bin/linux64/libopenvr_api.so

@@ -22,9 +22,11 @@
 {
 """)
 
+if len(sys.argv) != 2:
+	sys.exit(-1);
+json_path = sys.argv[1]
 
-
-data = api_shared.loadfile('../headers/openvr_api.json', 'vr')
+data = api_shared.loadfile(json_path, 'vr')
 converttype = api_shared.converttype
 structlist = api_shared.structlist
 typedeflist = api_shared.typedeflist

bin/linux64/libopenvr_api.so.dbg

@@ -16,8 +16,8 @@
 namespace vr
 {
 	static const uint32_t k_nSteamVRVersionMajor = 2;
-	static const uint32_t k_nSteamVRVersionMinor = 2;
-	static const uint32_t k_nSteamVRVersionBuild = 3;
+	static const uint32_t k_nSteamVRVersionMinor = 5;
+	static const uint32_t k_nSteamVRVersionBuild = 1;
 } // namespace vr
 
 // public_vrtypes.h
@@ -885,6 +885,11 @@ enum EVREventType
 	VREvent_DesktopMightBeVisible			= 536, // Sent when any known desktop related overlay is visible
 	VREvent_DesktopMightBeHidden			= 537, // Sent when all known desktop related overlays are hidden
 
+	VREvent_MutualSteamCapabilitiesChanged	= 538, // Sent when the set of capabilities common between both Steam and SteamVR have changed.
+
+	VREvent_OverlayCreated					= 539, // An OpenVR overlay of any sort was created. Data is overlay.
+	VREvent_OverlayDestroyed				= 540, // An OpenVR overlay of any sort was destroyed. Data is overlay.
+
 	VREvent_Notification_Shown				= 600,
 	VREvent_Notification_Hidden				= 601,
 	VREvent_Notification_BeginInteraction	= 602,
@@ -1647,6 +1652,7 @@ enum EVRNotificationError
 	VRNotificationError_NotificationQueueFull = 101,
 	VRNotificationError_InvalidOverlayHandle = 102,
 	VRNotificationError_SystemWithUserValueAlreadyExists = 103,
+	VRNotificationError_ServiceUnavailable = 104,
 };
 
 
@@ -2014,22 +2020,22 @@ static const uint32_t k_unScreenshotHandleInvalid = 0;
 /** Compositor frame timing reprojection flags. */
 const uint32_t VRCompositor_ReprojectionReason_Cpu = 0x01;
 const uint32_t VRCompositor_ReprojectionReason_Gpu = 0x02;
-const uint32_t VRCompositor_ReprojectionAsync = 0x04;	// This flag indicates the async reprojection mode is active,
+const uint32_t VRCompositor_ReprojectionAsync = 0x04;		// This flag indicates the async reprojection mode is active,
 															// but does not indicate if reprojection actually happened or not.
 															// Use the ReprojectionReason flags above to check if reprojection
 															// was actually applied (i.e. scene texture was reused).
 															// NumFramePresents > 1 also indicates the scene texture was reused,
 															// and also the number of times that it was presented in total.
 
-const uint32_t VRCompositor_ReprojectionMotion = 0x08;	// This flag indicates whether or not motion smoothing was triggered for this frame
+const uint32_t VRCompositor_ReprojectionMotion = 0x08;		// This flag indicates whether or not motion smoothing was triggered for this frame
 
-const uint32_t VRCompositor_PredictionMask = 0xF0;	// The runtime may predict more than one frame (up to four) ahead if
-															// it detects the application is taking too long to render. These two
+const uint32_t VRCompositor_PredictionMask = 0xF0;			// The runtime may predict more than one frame ahead if
+															// it detects the application is taking too long to render. These
 															// bits will contain the count of additional frames (normally zero).
 															// Use the VR_COMPOSITOR_ADDITIONAL_PREDICTED_FRAMES macro to read from
 															// the latest frame timing entry.
 
-const uint32_t VRCompositor_ThrottleMask = 0xF00;	// Number of frames the compositor is throttling the application.
+const uint32_t VRCompositor_ThrottleMask = 0xF00;			// Number of frames the compositor is throttling the application.
 															// Use the VR_COMPOSITOR_NUMBER_OF_THROTTLED_FRAMES macro to read from
 															// the latest frame timing entry.
 
@@ -2081,6 +2087,8 @@ struct Compositor_FrameTiming
 
 	uint32_t m_nNumVSyncsReadyForUse;
 	uint32_t m_nNumVSyncsToFirstView;
+
+	float m_flTransferLatencyMs;
 };
 #if defined(__linux__) || defined(__APPLE__)
 #pragma pack( pop )
@@ -2728,6 +2736,7 @@ namespace vr
 		VRSettingsError_ReadFailed = 3,
 		VRSettingsError_JsonParseFailed = 4,
 		VRSettingsError_UnsetSettingHasNoDefault = 5, // This will be returned if the setting does not appear in the appropriate default file and has not been set
+		VRSettingsError_AccessDenied = 6,
 	};
 
 	// The maximum length of a settings key
@@ -2869,6 +2878,7 @@ namespace vr
 	static const char * const k_pch_SteamVR_AdditionalFramesToPredict_Int32 = "additionalFramesToPredict";
 	static const char * const k_pch_SteamVR_WorldScale_Float = "worldScale";
 	static const char * const k_pch_SteamVR_FovScale_Int32 = "fovScale";
+	static const char * const k_pch_SteamVR_FovScaleLetterboxed_Bool = "fovScaleLetterboxed";
 	static const char * const k_pch_SteamVR_DisableAsyncReprojection_Bool = "disableAsync";
 	static const char * const k_pch_SteamVR_ForceFadeOnBadTracking_Bool = "forceFadeOnBadTracking";
 	static const char * const k_pch_SteamVR_DefaultMirrorView_Int32 = "mirrorView";
@@ -3069,7 +3079,7 @@ namespace vr
 	static const char * const k_pch_Dashboard_StickyDashboard = "stickyDashboard";
 	static const char * const k_pch_Dashboard_AllowSteamOverlays_Bool = "allowSteamOverlays";
 	static const char * const k_pch_Dashboard_AllowVRGamepadUI_Bool = "allowVRGamepadUI";
-	static const char * const k_pch_Dashboard_AllowDesktopBPMWithVRGamepadUI_Bool = "allowDesktopBPMWithVRGamepadUI";
+	static const char * const k_pch_Dashboard_AllowVRGamepadUIViaGamescope_Bool = "allowVRGamepadUIViaGamescope";
 	static const char * const k_pch_Dashboard_SteamMatchesHMDFramerate = "steamMatchesHMDFramerate";
 
 	//-----------------------------------------------------------------------------
@@ -3184,13 +3194,13 @@ class IVRChaperone
 	virtual bool GetPlayAreaSize( float *pSizeX, float *pSizeZ ) = 0;
 
 	/** Returns a quad describing the Play Area (formerly named Soft Bounds).
-	 * The corners form a rectangle. 
+	 * The corners form a rectangle.
 	 * Corners are in counter-clockwise order, starting at the front-right.
 	 * The positions are given relative to the standing origin.
 	 * The center of the rectangle is the center of the user's calibrated play space, not necessarily the standing
-	 * origin. 
+	 * origin.
 	 * The Play Area's forward direction goes from its center through the mid-point of a line drawn between the
-	 * first and second corner. 
+	 * first and second corner.
 	 * The quad lies on the XZ plane (height = 0y), with 2 sides parallel to the X-axis and two sides parallel
 	 * to the Z-axis of the user's calibrated Play Area. **/
 	virtual bool GetPlayAreaRect( HmdQuad_t *rect ) = 0;
@@ -4338,7 +4348,7 @@ namespace vr
 		/** Shows the dashboard. */
 		virtual void ShowDashboard( const char *pchOverlayToShow ) = 0;
 
-		/** Returns the tracked device that has the laser pointer in the dashboard */
+		/** Returns the tracked device index that has the laser pointer in the dashboard, or the last one that was used. */
 		virtual vr::TrackedDeviceIndex_t GetPrimaryDashboardDevice() = 0;
 
 		// ---------------------------------------------
@@ -5229,7 +5239,7 @@ namespace vr
 		virtual EVRInputError GetOriginTrackedDeviceInfo( VRInputValueHandle_t origin, InputOriginInfo_t *pOriginInfo, uint32_t unOriginInfoSize ) = 0;
 
 		/** Retrieves useful information about the bindings for an action */
-		virtual EVRInputError GetActionBindingInfo( VRActionHandle_t action, InputBindingInfo_t *pOriginInfo, uint32_t unBindingInfoSize, uint32_t unBindingInfoCount, uint32_t *punReturnedBindingInfoCount ) = 0;
+		virtual EVRInputError GetActionBindingInfo( VRActionHandle_t action, VR_ARRAY_COUNT( unBindingInfoCount ) InputBindingInfo_t *pOriginInfo, uint32_t unBindingInfoSize, uint32_t unBindingInfoCount, uint32_t *punReturnedBindingInfoCount ) = 0;
 
 		/** Shows the current binding for the action in-headset */
 		virtual EVRInputError ShowActionOrigins( VRActionSetHandle_t actionSetHandle, VRActionHandle_t ulActionHandle ) = 0;

bin/linuxarm64/libopenvr_api.so

@@ -1842,7 +1842,7 @@ public struct IVRInput
 	internal _GetOriginTrackedDeviceInfo GetOriginTrackedDeviceInfo;
 
 	[UnmanagedFunctionPointer(CallingConvention.StdCall)]
-	internal delegate EVRInputError _GetActionBindingInfo(ulong action, ref InputBindingInfo_t pOriginInfo, uint unBindingInfoSize, uint unBindingInfoCount, ref uint punReturnedBindingInfoCount);
+	internal delegate EVRInputError _GetActionBindingInfo(ulong action, [In, Out] InputBindingInfo_t[] pOriginInfo, uint unBindingInfoSize, uint unBindingInfoCount, ref uint punReturnedBindingInfoCount);
 	[MarshalAs(UnmanagedType.FunctionPtr)]
 	internal _GetActionBindingInfo GetActionBindingInfo;
 
@@ -4271,10 +4271,10 @@ public EVRInputError GetOriginTrackedDeviceInfo(ulong origin,ref InputOriginInfo
 		EVRInputError result = FnTable.GetOriginTrackedDeviceInfo(origin,ref pOriginInfo,unOriginInfoSize);
 		return result;
 	}
-	public EVRInputError GetActionBindingInfo(ulong action,ref InputBindingInfo_t pOriginInfo,uint unBindingInfoSize,uint unBindingInfoCount,ref uint punReturnedBindingInfoCount)
+	public EVRInputError GetActionBindingInfo(ulong action,InputBindingInfo_t [] pOriginInfo,uint unBindingInfoSize,ref uint punReturnedBindingInfoCount)
 	{
 		punReturnedBindingInfoCount = 0;
-		EVRInputError result = FnTable.GetActionBindingInfo(action,ref pOriginInfo,unBindingInfoSize,unBindingInfoCount,ref punReturnedBindingInfoCount);
+		EVRInputError result = FnTable.GetActionBindingInfo(action,pOriginInfo,unBindingInfoSize,(uint) pOriginInfo.Length,ref punReturnedBindingInfoCount);
 		return result;
 	}
 	public EVRInputError ShowActionOrigins(ulong actionSetHandle,ulong ulActionHandle)
@@ -5020,6 +5020,9 @@ public enum EVREventType
 	VREvent_DashboardThumbChanged = 535,
 	VREvent_DesktopMightBeVisible = 536,
 	VREvent_DesktopMightBeHidden = 537,
+	VREvent_MutualSteamCapabilitiesChanged = 538,
+	VREvent_OverlayCreated = 539,
+	VREvent_OverlayDestroyed = 540,
 	VREvent_Notification_Shown = 600,
 	VREvent_Notification_Hidden = 601,
 	VREvent_Notification_BeginInteraction = 602,
@@ -5317,6 +5320,7 @@ public enum EVRNotificationError
 	NotificationQueueFull = 101,
 	InvalidOverlayHandle = 102,
 	SystemWithUserValueAlreadyExists = 103,
+	ServiceUnavailable = 104,
 }
 public enum EVRSkeletalMotionRange
 {
@@ -5861,6 +5865,7 @@ public enum EVRSettingsError
 	ReadFailed = 3,
 	JsonParseFailed = 4,
 	UnsetSettingHasNoDefault = 5,
+	AccessDenied = 6,
 }
 public enum EVRScreenshotError
 {
@@ -6559,6 +6564,7 @@ public void Unpack(ref VRControllerState_t unpacked)
 	public TrackedDevicePose_t m_HmdPose;
 	public uint m_nNumVSyncsReadyForUse;
 	public uint m_nNumVSyncsToFirstView;
+	public float m_flTransferLatencyMs;
 }
 [StructLayout(LayoutKind.Sequential)] public struct Compositor_BenchmarkResults
 {
@@ -7810,6 +7816,7 @@ public static uint GetInitToken()
 	public const string k_pch_SteamVR_AdditionalFramesToPredict_Int32 = "additionalFramesToPredict";
 	public const string k_pch_SteamVR_WorldScale_Float = "worldScale";
 	public const string k_pch_SteamVR_FovScale_Int32 = "fovScale";
+	public const string k_pch_SteamVR_FovScaleLetterboxed_Bool = "fovScaleLetterboxed";
 	public const string k_pch_SteamVR_DisableAsyncReprojection_Bool = "disableAsync";
 	public const string k_pch_SteamVR_ForceFadeOnBadTracking_Bool = "forceFadeOnBadTracking";
 	public const string k_pch_SteamVR_DefaultMirrorView_Int32 = "mirrorView";
@@ -7968,7 +7975,7 @@ public static uint GetInitToken()
 	public const string k_pch_Dashboard_StickyDashboard = "stickyDashboard";
 	public const string k_pch_Dashboard_AllowSteamOverlays_Bool = "allowSteamOverlays";
 	public const string k_pch_Dashboard_AllowVRGamepadUI_Bool = "allowVRGamepadUI";
-	public const string k_pch_Dashboard_AllowDesktopBPMWithVRGamepadUI_Bool = "allowDesktopBPMWithVRGamepadUI";
+	public const string k_pch_Dashboard_AllowVRGamepadUIViaGamescope_Bool = "allowVRGamepadUIViaGamescope";
 	public const string k_pch_Dashboard_SteamMatchesHMDFramerate = "steamMatchesHMDFramerate";
 	public const string k_pch_modelskin_Section = "modelskins";
 	public const string k_pch_Driver_Enable_Bool = "enable";

bin/linuxarm64/libopenvr_api.so.dbg

@@ -463,6 +463,9 @@
 	,{"name": "VREvent_DashboardThumbChanged","value": "535"}
 	,{"name": "VREvent_DesktopMightBeVisible","value": "536"}
 	,{"name": "VREvent_DesktopMightBeHidden","value": "537"}
+	,{"name": "VREvent_MutualSteamCapabilitiesChanged","value": "538"}
+	,{"name": "VREvent_OverlayCreated","value": "539"}
+	,{"name": "VREvent_OverlayDestroyed","value": "540"}
 	,{"name": "VREvent_Notification_Shown","value": "600"}
 	,{"name": "VREvent_Notification_Hidden","value": "601"}
 	,{"name": "VREvent_Notification_BeginInteraction","value": "602"}
@@ -744,6 +747,7 @@
 	,{"name": "VRNotificationError_NotificationQueueFull","value": "101"}
 	,{"name": "VRNotificationError_InvalidOverlayHandle","value": "102"}
 	,{"name": "VRNotificationError_SystemWithUserValueAlreadyExists","value": "103"}
+	,{"name": "VRNotificationError_ServiceUnavailable","value": "104"}
 ]}
 ,	{"enumname": "vr::EVRSkeletalMotionRange","values": [ 
 	{"name": "VRSkeletalMotionRange_WithController","value": "0"}
@@ -1253,6 +1257,7 @@
 	,{"name": "VRSettingsError_ReadFailed","value": "3"}
 	,{"name": "VRSettingsError_JsonParseFailed","value": "4"}
 	,{"name": "VRSettingsError_UnsetSettingHasNoDefault","value": "5"}
+	,{"name": "VRSettingsError_AccessDenied","value": "6"}
 ]}
 ,	{"enumname": "vr::EVRScreenshotError","values": [ 
 	{"name": "VRScreenshotError_None","value": "0"}
@@ -1564,6 +1569,8 @@
 	"constname": "k_pch_SteamVR_WorldScale_Float","consttype": "const char *const", "constval": "worldScale"}
 ,{
 	"constname": "k_pch_SteamVR_FovScale_Int32","consttype": "const char *const", "constval": "fovScale"}
+,{
+	"constname": "k_pch_SteamVR_FovScaleLetterboxed_Bool","consttype": "const char *const", "constval": "fovScaleLetterboxed"}
 ,{
 	"constname": "k_pch_SteamVR_DisableAsyncReprojection_Bool","consttype": "const char *const", "constval": "disableAsync"}
 ,{
@@ -1881,7 +1888,7 @@
 ,{
 	"constname": "k_pch_Dashboard_AllowVRGamepadUI_Bool","consttype": "const char *const", "constval": "allowVRGamepadUI"}
 ,{
-	"constname": "k_pch_Dashboard_AllowDesktopBPMWithVRGamepadUI_Bool","consttype": "const char *const", "constval": "allowDesktopBPMWithVRGamepadUI"}
+	"constname": "k_pch_Dashboard_AllowVRGamepadUIViaGamescope_Bool","consttype": "const char *const", "constval": "allowVRGamepadUIViaGamescope"}
 ,{
 	"constname": "k_pch_Dashboard_SteamMatchesHMDFramerate","consttype": "const char *const", "constval": "steamMatchesHMDFramerate"}
 ,{
@@ -2350,7 +2357,8 @@
 { "fieldname": "m_flCompositorRenderStartMs", "fieldtype": "float"},
 { "fieldname": "m_HmdPose", "fieldtype": "vr::TrackedDevicePose_t"},
 { "fieldname": "m_nNumVSyncsReadyForUse", "fieldtype": "uint32_t"},
-{ "fieldname": "m_nNumVSyncsToFirstView", "fieldtype": "uint32_t"}]}
+{ "fieldname": "m_nNumVSyncsToFirstView", "fieldtype": "uint32_t"},
+{ "fieldname": "m_flTransferLatencyMs", "fieldtype": "float"}]}
 ,{"struct": "vr::Compositor_BenchmarkResults","fields": [
 { "fieldname": "m_flMegaPixelsPerSecond", "fieldtype": "float"},
 { "fieldname": "m_flHmdRecommendedMegaPixelsPerSecond", "fieldtype": "float"}]}
@@ -5560,7 +5568,7 @@
 	"returntype": "vr::EVRInputError",
 	"params": [ 
 {	"paramname": "action" ,"paramtype": "vr::VRActionHandle_t"},
-{	"paramname": "pOriginInfo" ,"paramtype": "struct vr::InputBindingInfo_t *"},
+{	"paramname": "pOriginInfo" ,"array_count": "unBindingInfoCount" ,"paramtype": "struct vr::InputBindingInfo_t *"},
 {	"paramname": "unBindingInfoSize" ,"paramtype": "uint32_t"},
 {	"paramname": "unBindingInfoCount" ,"paramtype": "uint32_t"},
 {	"paramname": "punReturnedBindingInfoCount" ,"paramtype": "uint32_t *"}

bin/linuxarm64/libopenvr_api_unity.so

@@ -183,6 +183,7 @@ static const char * k_pch_SteamVR_FramesToThrottle_Int32 = "framesToThrottle";
 static const char * k_pch_SteamVR_AdditionalFramesToPredict_Int32 = "additionalFramesToPredict";
 static const char * k_pch_SteamVR_WorldScale_Float = "worldScale";
 static const char * k_pch_SteamVR_FovScale_Int32 = "fovScale";
+static const char * k_pch_SteamVR_FovScaleLetterboxed_Bool = "fovScaleLetterboxed";
 static const char * k_pch_SteamVR_DisableAsyncReprojection_Bool = "disableAsync";
 static const char * k_pch_SteamVR_ForceFadeOnBadTracking_Bool = "forceFadeOnBadTracking";
 static const char * k_pch_SteamVR_DefaultMirrorView_Int32 = "mirrorView";
@@ -341,7 +342,7 @@ static const char * k_pch_Dashboard_UseStandaloneSystemLayer = "standaloneSystem
 static const char * k_pch_Dashboard_StickyDashboard = "stickyDashboard";
 static const char * k_pch_Dashboard_AllowSteamOverlays_Bool = "allowSteamOverlays";
 static const char * k_pch_Dashboard_AllowVRGamepadUI_Bool = "allowVRGamepadUI";
-static const char * k_pch_Dashboard_AllowDesktopBPMWithVRGamepadUI_Bool = "allowDesktopBPMWithVRGamepadUI";
+static const char * k_pch_Dashboard_AllowVRGamepadUIViaGamescope_Bool = "allowVRGamepadUIViaGamescope";
 static const char * k_pch_Dashboard_SteamMatchesHMDFramerate = "steamMatchesHMDFramerate";
 static const char * k_pch_modelskin_Section = "modelskins";
 static const char * k_pch_Driver_Enable_Bool = "enable";
@@ -884,6 +885,9 @@ typedef enum EVREventType
 	EVREventType_VREvent_DashboardThumbChanged = 535,
 	EVREventType_VREvent_DesktopMightBeVisible = 536,
 	EVREventType_VREvent_DesktopMightBeHidden = 537,
+	EVREventType_VREvent_MutualSteamCapabilitiesChanged = 538,
+	EVREventType_VREvent_OverlayCreated = 539,
+	EVREventType_VREvent_OverlayDestroyed = 540,
 	EVREventType_VREvent_Notification_Shown = 600,
 	EVREventType_VREvent_Notification_Hidden = 601,
 	EVREventType_VREvent_Notification_BeginInteraction = 602,
@@ -1197,6 +1201,7 @@ typedef enum EVRNotificationError
 	EVRNotificationError_VRNotificationError_NotificationQueueFull = 101,
 	EVRNotificationError_VRNotificationError_InvalidOverlayHandle = 102,
 	EVRNotificationError_VRNotificationError_SystemWithUserValueAlreadyExists = 103,
+	EVRNotificationError_VRNotificationError_ServiceUnavailable = 104,
 } EVRNotificationError;
 
 typedef enum EVRSkeletalMotionRange
@@ -1776,6 +1781,7 @@ typedef enum EVRSettingsError
 	EVRSettingsError_VRSettingsError_ReadFailed = 3,
 	EVRSettingsError_VRSettingsError_JsonParseFailed = 4,
 	EVRSettingsError_VRSettingsError_UnsetSettingHasNoDefault = 5,
+	EVRSettingsError_VRSettingsError_AccessDenied = 6,
 } EVRSettingsError;
 
 typedef enum EVRScreenshotError
@@ -2383,6 +2389,7 @@ typedef struct Compositor_FrameTiming
 	TrackedDevicePose_t m_HmdPose;
 	uint32_t m_nNumVSyncsReadyForUse;
 	uint32_t m_nNumVSyncsToFirstView;
+	float m_flTransferLatencyMs;
 } Compositor_FrameTiming;
 
 typedef struct Compositor_BenchmarkResults