version 2.0.0

com.htc.upm.vive.openxr/Runtime/Features/Foveation/Scripts/ViveFoveation.cs

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+// Copyright HTC Corporation All Rights Reserved.
+using System.Collections.Generic;
+using UnityEditor;
+using UnityEngine.XR.OpenXR;
+using UnityEngine.XR.OpenXR.Features;
+using System.Runtime.InteropServices;
+using System;
+using UnityEngine;
+
+#if UNITY_EDITOR
+using UnityEditor.XR.OpenXR.Features;
+#endif
+
+namespace VIVE.OpenXR
+{
+#if UNITY_EDITOR
+    [OpenXRFeature(UiName = "VIVE XR Foveation",
+		Desc = "Support the HTC foveation extension.",
+		Company = "HTC",
+		DocumentationLink = "..\\Documentation",
+		OpenxrExtensionStrings = "XR_HTC_foveation",
+		Version = "1.0.0",
+		BuildTargetGroups = new[] { BuildTargetGroup.Android },
+        FeatureId = featureId
+	)]
+#endif
+    public class ViveFoveation : OpenXRFeature
+    {
+		/// <summary>
+		/// Flag bits for XrFoveationDynamicFlagsHTC
+		/// </summary>
+		public const UInt64 XR_FOVEATION_DYNAMIC_LEVEL_ENABLED_BIT_HTC = 0x00000001;
+		public const UInt64 XR_FOVEATION_DYNAMIC_CLEAR_FOV_ENABLED_BIT_HTC = 0x00000002;
+		public const UInt64 XR_FOVEATION_DYNAMIC_FOCAL_CENTER_OFFSET_ENABLED_BIT_HTC = 0x00000004;
+
+		/// <summary>
+		/// The feature id string. This is used to give the feature a well known id for reference.
+		/// </summary>
+		public const string featureId = "vive.openxr.feature.foveation";
+
+		protected override IntPtr HookGetInstanceProcAddr(IntPtr func)
+		{
+			Debug.Log("EXT: registering our own xrGetInstanceProcAddr");
+            if (SystemInfo.graphicsDeviceType == UnityEngine.Rendering.GraphicsDeviceType.Vulkan)
+            {
+                Debug.Log("Vulkan no hook foveation");
+                return func;
+            }
+            return intercept_xrGetInstanceProcAddr(func);
+		}
+
+		private const string ExtLib = "viveopenxr";
+		[DllImport(ExtLib, EntryPoint = "intercept_xrGetInstanceProcAddr")]
+		private static extern IntPtr intercept_xrGetInstanceProcAddr(IntPtr func);
+
+		[DllImport(ExtLib, EntryPoint = "applyFoveationHTC")]
+		private static extern XrResult applyFoveationHTC(XrFoveationModeHTC mode, UInt32 configCount, XrFoveationConfigurationHTC[] configs, UInt64 flags);
+
+		/// <summary>
+		/// function to apply HTC Foveation
+		/// </summary>
+		public static XrResult ApplyFoveationHTC(XrFoveationModeHTC mode, UInt32 configCount, XrFoveationConfigurationHTC[] configs, UInt64 flags = 0)
+		{
+			//Debug.Log("Unity HTCFoveat:configCount " + configCount);
+			//if (configCount >=2) {
+				//Debug.Log("Unity HTCFoveat:configs[0].clearFovDegree " + configs[0].clearFovDegree);
+				//Debug.Log("Unity HTCFoveat:configs[0].level " + configs[0].level);
+				//Debug.Log("Unity HTCFoveat:configs[1].clearFovDegree " + configs[1].clearFovDegree);
+				//Debug.Log("Unity HTCFoveat:configs[1].level " + configs[1].level);
+			//}
+			return applyFoveationHTC(mode, configCount, configs, flags);
+		}
+    }
+}

com.htc.upm.vive.openxr/Runtime/Features/Foveation/Scripts/ViveFoveation.cs.meta

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