version 2.3.0

com.htc.upm.vive.openxr/Runtime/Common/ViveInterceptorsWaitFrame.cs

@@ -0,0 +1,61 @@
+// Copyright HTC Corporation All Rights Reserved.
+using System.Runtime.InteropServices;
+using System;
+using UnityEngine;
+using AOT;
+
+namespace VIVE.OpenXR
+{
+	partial class ViveInterceptors
+	{
+		#region XRWaitFrame
+		public struct XrFrameWaitInfo
+		{
+			public XrStructureType type;
+			public IntPtr next;
+		}
+
+		public struct XrFrameState
+		{
+			public XrStructureType type;
+			public IntPtr next;
+			public XrTime predictedDisplayTime;
+			public XrDuration predictedDisplayPeriod;
+			public XrBool32 shouldRender;
+		}
+
+		public delegate XrResult DelegateXrWaitFrame(XrSession session, ref XrFrameWaitInfo frameWaitInfo, ref XrFrameState frameState);
+		private static readonly DelegateXrWaitFrame xrWaitFrameInterceptorHandle = new DelegateXrWaitFrame(XrWaitFrameInterceptor);
+		private static readonly IntPtr xrWaitFrameInterceptorPtr = Marshal.GetFunctionPointerForDelegate(xrWaitFrameInterceptorHandle);
+		static DelegateXrWaitFrame XrWaitFrameOriginal = null;
+
+		[MonoPInvokeCallback(typeof(DelegateXrWaitFrame))]
+		private static XrResult XrWaitFrameInterceptor(XrSession session, ref XrFrameWaitInfo frameWaitInfo, ref XrFrameState frameState)
+		{
+			var ret = XrWaitFrameOriginal(session, ref frameWaitInfo, ref frameState);
+			currentFrameState = frameState;
+			return ret;
+		}
+
+		static XrFrameState currentFrameState = new XrFrameState() { predictedDisplayTime = 0 };
+
+		public XrFrameState GetCurrentFrameState()
+		{
+			if (!isInited) throw new Exception("ViveInterceptors is not inited");
+
+			return currentFrameState;
+		}
+
+		public XrTime GetPredictTime()
+		{
+			if (!isInited) throw new Exception("ViveInterceptors is not inited");
+
+			Debug.Log($"{TAG}: XrWaitFrameInterceptor(predictedDisplayTime={currentFrameState.predictedDisplayTime}");
+			if (currentFrameState.predictedDisplayTime == 0)
+				return new XrTime((long)(1000000L * (Time.unscaledTimeAsDouble + 0.011f)));
+			else
+				return currentFrameState.predictedDisplayTime;
+		}
+		#endregion XRWaitFrame
+	}
+}