Fixed side effect on styles during compositor rendering.

com.unity.render-pipelines.high-definition/CHANGELOG.md

@@ -13,6 +13,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - Fixed an issue with light intensity prefab override application not visible in the inspector (case 1299563).
 - Fixed Undo/Redo instability of light temperature.
 - Fixed label style in pbr sky editor.
+- Fixed side effect on styles during compositor rendering.
 
 ### Changed
 - Change the source value for the ray tracing frame index iterator from m_FrameCount to the camera frame count (case 1301356).

com.unity.render-pipelines.high-definition/Editor/Compositor/CompositionManagerEditor.Styles.cs

@@ -19,6 +19,7 @@ static internal class CompositorStyle
 
 
         internal static readonly int k_IconSize = 28;
+        internal static readonly int k_HeaderFontSize = 14;
         internal static readonly int k_ListItemPading = 4;
         internal static readonly int k_ListItemStackPading = 20;
         internal static readonly float k_SingleLineHeight = EditorGUIUtility.singleLineHeight;

com.unity.render-pipelines.high-definition/Editor/Compositor/CompositionManagerEditor.cs

@@ -29,6 +29,8 @@ static partial class Styles
             static public readonly string k_AlphaWarningPipeline = "The rendering pipeline was not configured to output an alpha channel. You can select a color buffer format that supports alpha in the HDRP quality settings.";
             static public readonly string k_AlphaWarningPost = "The post processing system was not configured to process the alpha channel. You can select a buffer format that supports alpha in the HDRP quality settings.";
             static public readonly string k_ShaderWarning = "You must specify a composition graph to see an output from the compositor.";
+
+            static public readonly GUIStyle k_HeaderStyle = new GUIStyle(EditorStyles.helpBox) { fontSize = CompositorStyle.k_HeaderFontSize };
         }
 
         ReorderableList m_layerList;
@@ -121,9 +123,6 @@ public override void OnInspectorGUI()
                 return;
             }
 
-            var headerStyle = EditorStyles.helpBox;
-            headerStyle.fontSize = 14;
-
             // Cache the serialized property fields
             if (m_IsEditorDirty || m_SerializedProperties == null)
             {
@@ -273,7 +272,7 @@ public override void OnInspectorGUI()
 
             EditorGUI.BeginChangeCheck();
             EditorGUILayout.BeginVertical();
-            EditorGUILayout.LabelField(Styles.k_RenderSchedule, headerStyle);
+            EditorGUILayout.LabelField(Styles.k_RenderSchedule, Styles.k_HeaderStyle);
             m_layerList.DoLayoutList();
             EditorGUILayout.EndVertical();
             if (EditorGUI.EndChangeCheck())
@@ -292,7 +291,7 @@ public override void OnInspectorGUI()
             EditorGUI.BeginChangeCheck();
             if (m_layerList.index >= 0)
             {
-                EditorGUILayout.LabelField(Styles.k_Properties, headerStyle);
+                EditorGUILayout.LabelField(Styles.k_Properties, Styles.k_HeaderStyle);
 
                 rectangle.y += EditorGUIUtility.singleLineHeight * 1.5f;
                 rectangle.x += 5;