feat(rendering): expose managed SRP asset final color defaults

managed/XCEngine.ScriptCore/FinalColorExposureMode.cs

@@ -0,0 +1,8 @@
+namespace XCEngine
+{
+    public enum FinalColorExposureMode : byte
+    {
+        Disabled = 0,
+        Fixed = 1
+    }
+}

managed/XCEngine.ScriptCore/FinalColorOutputTransferMode.cs

@@ -0,0 +1,8 @@
+namespace XCEngine
+{
+    public enum FinalColorOutputTransferMode : byte
+    {
+        Disabled = 0,
+        LinearToSRGB = 1
+    }
+}

managed/XCEngine.ScriptCore/FinalColorSettings.cs

@@ -0,0 +1,22 @@
+using System.Runtime.InteropServices;
+
+namespace XCEngine
+{
+    [StructLayout(LayoutKind.Sequential)]
+    public struct FinalColorSettings
+    {
+        public FinalColorOutputTransferMode outputTransferMode;
+        public FinalColorExposureMode exposureMode;
+        public float exposureValue;
+        public FinalColorToneMappingMode toneMappingMode;
+        public Vector4 finalColorScale;
+
+        public static FinalColorSettings CreateDefault()
+        {
+            FinalColorSettings settings = new FinalColorSettings();
+            settings.exposureValue = 1.0f;
+            settings.finalColorScale = new Vector4(1.0f, 1.0f, 1.0f, 1.0f);
+            return settings;
+        }
+    }
+}

managed/XCEngine.ScriptCore/FinalColorToneMappingMode.cs

@@ -0,0 +1,9 @@
+namespace XCEngine
+{
+    public enum FinalColorToneMappingMode : byte
+    {
+        Disabled = 0,
+        Neutral = 1,
+        ACES = 2
+    }
+}

managed/XCEngine.ScriptCore/ScriptableRenderPipelineAsset.cs

@@ -20,5 +20,10 @@ namespace XCEngine
             ScriptableRenderPipelinePlanningContext context)
         {
         }
+
+        protected internal virtual FinalColorSettings GetDefaultFinalColorSettings()
+        {
+            return FinalColorSettings.CreateDefault();
+        }
     }
 }