Fixed asset bundle reloading nullref

Author: Chman

CHANGELOG.md

@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 ### Fixed
 - Viewport handling wasn't working correctly when FXAA or SMAA were used with builtin pipelines.
 - Depth of Field could end up fully blurry depending on the project setup.
+- Reloading an asset bundle that has references to post-processing was broken.
 
 ### Changed
 - Warning for mobiles about using post-processing with non-fullscreen cameras.

PostProcessing/Runtime/PostProcessLayer.cs

@@ -785,7 +785,7 @@ public bool HasActiveEffects(PostProcessEvent evt, PostProcessRenderContext cont
 
         void SetupContext(PostProcessRenderContext context)
         {
-            RuntimeUtilities.s_Resources = m_Resources;
+            RuntimeUtilities.UpdateResources(m_Resources);
 
             m_IsRenderingInSceneView = context.camera.cameraType == CameraType.SceneView;
             context.isSceneView = m_IsRenderingInSceneView;

PostProcessing/Runtime/Utils/RuntimeUtilities.cs

@@ -223,8 +223,7 @@ public static Texture2D GetLutStrip(int size)
 
         #region Rendering
 
-        internal static PostProcessResources s_Resources;
-
+        static PostProcessResources s_Resources;
         static Mesh s_FullscreenTriangle;
 
         /// <summary>
@@ -382,6 +381,24 @@ public static PropertySheet copyFromTexArraySheet
             }
         }
 
+        internal static void UpdateResources(PostProcessResources resources)
+        {
+            Destroy(s_CopyMaterial);
+            Destroy(s_CopyStdMaterial);
+            Destroy(s_CopyFromTexArrayMaterial);
+            Destroy(s_CopyStdFromDoubleWideMaterial);
+
+            s_CopyMaterial = null;
+            s_CopyStdMaterial = null;
+            s_CopyFromTexArrayMaterial = null;
+            s_CopyStdFromDoubleWideMaterial = null;
+
+            s_CopySheet = null;
+            s_CopyFromTexArraySheet = null;
+
+            s_Resources = resources;
+        }
+
         /// <summary>
         /// Sets the current render target using specified <see cref="RenderBufferLoadAction"/>.
         /// </summary>