XRSessionFeatureEditor.cs

// <copyright file="XRSessionFeatureEditor.cs" company="Google LLC">
//
// Copyright 2024 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
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//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
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// See the License for the specific language governing permissions and
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namespace Google.XR.Extensions.Editor.Internal
{
    using UnityEditor;
    using UnityEngine;

    /// <summary>
    /// Custom Editor for <see cref="XRSessionFeature"/>.
    /// </summary>
    [CustomEditor(typeof(XRSessionFeature))]
    internal class XRSessionFeatureEditor : Editor
    {
        private const string _immersiveXRFieldName = "ImmersiveXR";
        private const string _immersiveXRTooltip =
            "Indicate that the activity starts as XR Immersive app, " +
            "and will be launched in full-screen mode.";

        private const string _subsamplingFieldName = "_vulkanSubsampling";
        private const string _subsamplingTooltip =
            "Enable Subsampling (Vulkan) to reduce memory bandwidth on foveated framebuffers. " +
            "It only takes effect when Foveated Rendering feature is in use.";

        private const string _spacewarpFieldName = "_spacewarp";
#if UNITY_6000_0_23_OR_NEWER
        private const string _spacewarpTooltip =
            "Enable URP Spacewarp (Vulkan) to unlock extra computation power for suitable content.";
#else
        private const string _spacewarpTooltip =
            "Enable URP Spacewarp (Vulkan) to unlock extra computation power for suitable content."
            + " Note: it requires 6000.0.23f1 or newer versions.";
#endif // UNITY_6000_0_23_OR_NEWER

        private static readonly GUIContent _immersiveXRLabel = new GUIContent(
            "Immersive XR", _immersiveXRTooltip);

        private static readonly GUIContent _subsamplingLabel = new GUIContent(
            "Subsampling (Vulkan)", _subsamplingTooltip);

        private static readonly GUIContent _spacewarpLabel = new GUIContent(
            "URP SpaceWarp (Vulkan)", _spacewarpTooltip);

        private SerializedProperty _immersiveXR;
        private SerializedProperty _subsampling;
        private SerializedProperty _spacewarp;

        /// <inheritdoc/>
        public override void OnInspectorGUI()
        {
            EditorGUIUtility.labelWidth = 200.0f;

            serializedObject.Update();
            _immersiveXR.boolValue = EditorGUILayout.Toggle(
                _immersiveXRLabel, _immersiveXR.boolValue);
            _subsampling.boolValue = EditorGUILayout.Toggle(
                _subsamplingLabel, _subsampling.boolValue);
            _spacewarp.boolValue = EditorGUILayout.Toggle(_spacewarpLabel, _spacewarp.boolValue);
#if !UNITY_6000_0_23_OR_NEWER
            if (_spacewarp.boolValue)
            {
                EditorGUILayout.HelpBox(
                    "URP Spacewarp (Vulkan) requires 6000.0.23f1 or newer versions.",
                    MessageType.Warning);
            }
#endif
            serializedObject.ApplyModifiedProperties();

            EditorGUIUtility.labelWidth = 0f;
        }

        private void OnEnable()
        {
            _immersiveXR = serializedObject.FindProperty(_immersiveXRFieldName);
            _subsampling = serializedObject.FindProperty(_subsamplingFieldName);
            _spacewarp = serializedObject.FindProperty(_spacewarpFieldName);
        }
    }
}