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Packages/com.unity.xr.openxr/Runtime/CompositionLayers/OpenXRCompositionLayersFeature.cs

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+#if XR_COMPOSITION_LAYERS
+using UnityEditor;
+using Unity.XR.CompositionLayers.Services;
+using UnityEngine.XR.OpenXR.CompositionLayers;
+#if UNITY_EDITOR
+using UnityEditor.XR.OpenXR.Features;
+#endif
+
+namespace UnityEngine.XR.OpenXR.Features.CompositionLayers
+{
+    /// <summary>
+    /// Enables OpenXR Composition Layers.
+    /// </summary>
+#if UNITY_EDITOR
+    [OpenXRFeature(UiName = FeatureName,
+        Desc = "Necessary to use OpenXR Composition Layers.",
+        Company = "Unity",
+        OpenxrExtensionStrings = "XR_KHR_composition_layer_cylinder XR_KHR_composition_layer_equirect XR_KHR_composition_layer_equirect2 XR_KHR_composition_layer_cube XR_KHR_composition_layer_color_scale_bias XR_KHR_android_surface_swapchain",
+        Version = "1.0.0",
+        BuildTargetGroups = new[] { BuildTargetGroup.Android, BuildTargetGroup.Standalone, BuildTargetGroup.WSA },
+        FeatureId = FeatureId
+    )]
+#endif
+    public class OpenXRCompositionLayersFeature : OpenXRFeature
+    {
+        public const string FeatureId = "com.unity.openxr.feature.compositionlayers";
+        internal const string FeatureName = "Composition Layers Support";
+
+        protected internal override void OnSessionBegin(ulong xrSession)
+        {
+            if (CompositionLayerManager.Instance != null)
+            {
+                CompositionLayerManager.Instance.LayerProvider ??= new OpenXRLayerProvider();
+            }
+        }
+
+        protected internal override void OnSessionEnd(ulong xrSession)
+        {
+            if (CompositionLayerManager.Instance?.LayerProvider is OpenXRLayerProvider)
+            {
+                ((OpenXRLayerProvider)CompositionLayerManager.Instance.LayerProvider).Dispose();
+                CompositionLayerManager.Instance.LayerProvider = null;
+            }
+        }
+    }
+}
+#endif