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Assets/Oculus/VR/Editor/OVRShaderBuildProcessor.cs

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+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ * All rights reserved.
+ *
+ * Licensed under the Oculus SDK License Agreement (the "License");
+ * you may not use the Oculus SDK except in compliance with the License,
+ * which is provided at the time of installation or download, or which
+ * otherwise accompanies this software in either electronic or hard copy form.
+ *
+ * You may obtain a copy of the License at
+ *
+ * https://developer.oculus.com/licenses/oculussdk/
+ *
+ * Unless required by applicable law or agreed to in writing, the Oculus SDK
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+using System.Collections.Generic;
+using UnityEditor;
+using UnityEditor.Build;
+using UnityEditor.Rendering;
+using UnityEngine;
+using UnityEngine.Rendering;
+
+public class OVRShaderBuildProcessor : IPreprocessShaders
+{
+    public int callbackOrder
+    {
+        get { return 0; }
+    }
+
+    public void OnProcessShader(
+        Shader shader, ShaderSnippetData snippet, IList<ShaderCompilerData> shaderCompilerData)
+    {
+        var projectConfig = OVRProjectConfig.GetProjectConfig();
+        if (projectConfig == null)
+        {
+            return;
+        }
+
+        if (!projectConfig.skipUnneededShaders)
+        {
+            return;
+        }
+
+        if (EditorUserBuildSettings.activeBuildTarget != BuildTarget.Android)
+        {
+            return;
+        }
+
+        var strippedGraphicsTiers = new HashSet<GraphicsTier>();
+
+        // Unity only uses shader Tier2 on Quest and Go (regardless of graphics API)
+        if (projectConfig.targetDeviceTypes.Contains(OVRProjectConfig.DeviceType.Quest) ||
+            projectConfig.targetDeviceTypes.Contains(OVRProjectConfig.DeviceType.Quest2) ||
+            projectConfig.targetDeviceTypes.Contains(OVRProjectConfig.DeviceType.QuestPro))
+        {
+            strippedGraphicsTiers.Add(GraphicsTier.Tier1);
+            strippedGraphicsTiers.Add(GraphicsTier.Tier3);
+        }
+
+        if (strippedGraphicsTiers.Count == 0)
+        {
+            return;
+        }
+
+        for (int i = shaderCompilerData.Count - 1; i >= 0; --i)
+        {
+            if (strippedGraphicsTiers.Contains(shaderCompilerData[i].graphicsTier))
+            {
+                shaderCompilerData.RemoveAt(i);
+            }
+        }
+    }
+}