From 309ea13afff958d5d680fdd7d4d6d27a14d53cb8 Mon Sep 17 00:00:00 2001
From: wsycarlos <wsycarlos@126.com>
Date: Thu, 15 Jan 2026 18:38:05 +0800
Subject: [PATCH] Fix Outline Instance Missing Issue

---
 .../Runtime/TextMeshProBywayUI.cs             | 21 +++++++++
 .../TextMeshProBywayUIRuntimeHelper.cs        | 45 +++++++++++++------
 .../package.json                              |  2 +-
 3 files changed, 54 insertions(+), 14 deletions(-)

diff --git a/Packages/com.bywaystudios.textmeshpro.ext/Runtime/TextMeshProBywayUI.cs b/Packages/com.bywaystudios.textmeshpro.ext/Runtime/TextMeshProBywayUI.cs
index baac862..667d1a9 100644
--- a/Packages/com.bywaystudios.textmeshpro.ext/Runtime/TextMeshProBywayUI.cs
+++ b/Packages/com.bywaystudios.textmeshpro.ext/Runtime/TextMeshProBywayUI.cs
@@ -9,6 +9,27 @@ namespace Byway.TMP
 
         public bool m_OutlineUnderlayChanged;
 
+        public Material BackupOriginal()
+        {
+            Material mat = new Material(fontSharedMaterial);
+            mat.shaderKeywords = fontSharedMaterial.shaderKeywords;
+            mat.name += " (Backup)";
+            return mat;
+        }
+
+        public void AssignInstance(Material mat)
+        {
+            m_fontMaterial = mat;
+
+            m_sharedMaterial = m_fontMaterial;
+
+            m_padding = GetPaddingForMaterial();
+
+            m_ShouldRecalculateStencil = true;
+            SetVerticesDirty();
+            SetMaterialDirty();
+        }
+
 
         public void NotifyHelper()
         {
diff --git a/Packages/com.bywaystudios.textmeshpro.ext/Runtime/TextMeshProBywayUIRuntimeHelper.cs b/Packages/com.bywaystudios.textmeshpro.ext/Runtime/TextMeshProBywayUIRuntimeHelper.cs
index d734e08..ac7dc3e 100644
--- a/Packages/com.bywaystudios.textmeshpro.ext/Runtime/TextMeshProBywayUIRuntimeHelper.cs
+++ b/Packages/com.bywaystudios.textmeshpro.ext/Runtime/TextMeshProBywayUIRuntimeHelper.cs
@@ -7,14 +7,32 @@ namespace Byway.TMP
     public class TextMeshProBywayUIRuntimeHelper : MonoBehaviour
     {
         private TextMeshProBywayUI m_TextComponent;
+        private Material m_TextMaterialOriginal;
         private Material m_TextMaterialInstance;
 
+        private Material CreateInstance(Material source)
+        {
+            // Get Shader PropertyIDs if they haven't been cached already.
+            ShaderUtilities.GetShaderPropertyIDs();
+            Material mat = new Material(source);
+            mat.shaderKeywords = source.shaderKeywords;
+            mat.name += " (Instance)";
+            return mat;
+        }
+
         private void CheckMaterialInstance()
         {
-            DestroyMaterialInstanceIfNeeded();
             if (m_TextComponent != null && (m_TextComponent.outline || m_TextComponent.underlay))
             {
-                m_TextMaterialInstance = m_TextComponent.fontMaterial;
+                if (m_TextMaterialOriginal == null)
+                {
+                    m_TextMaterialOriginal = m_TextComponent.BackupOriginal();
+                }
+                if (m_TextMaterialInstance == null)
+                {
+                    m_TextMaterialInstance = CreateInstance(m_TextMaterialOriginal);
+                    m_TextComponent.AssignInstance(m_TextMaterialInstance);
+                }
             }
         }
 
@@ -33,7 +51,6 @@ namespace Byway.TMP
                     m_TextMaterialInstance.DisableKeyword(ShaderUtilities.Keyword_Outline);
                 }
 
-
                 if (m_TextComponent.underlay)
                 {
                     m_TextMaterialInstance.EnableKeyword(ShaderUtilities.Keyword_Underlay);
@@ -50,31 +67,33 @@ namespace Byway.TMP
             }
         }
 
-        private void DestroyMaterialInstanceIfNeeded()
-        {
-            if(m_TextComponent == null || (!m_TextComponent.outline && !m_TextComponent.underlay))
-            {
-                DestroyMaterialInstance();
-            }
-        }
-
-        private void DestroyMaterialInstance()
+        private void DestroyAllMaterialInstances()
         {
             if (m_TextMaterialInstance != null)
             {
                 Destroy(m_TextMaterialInstance);
             }
+            if (m_TextMaterialOriginal != null)
+            {
+                Destroy(m_TextMaterialOriginal);
+            }
         }
 
         private void Awake()
         {
             m_TextComponent = GetComponent<TextMeshProBywayUI>();
+            CheckMaterialInstance();
+            Notify();
+        }
+
+        private void OnEnable()
+        {
             Notify();
         }
 
         private void OnDestroy()
         {
-            DestroyMaterialInstance();
+            DestroyAllMaterialInstances();
         }
 
         public void Notify()
diff --git a/Packages/com.bywaystudios.textmeshpro.ext/package.json b/Packages/com.bywaystudios.textmeshpro.ext/package.json
index 81230b5..d8ce3f6 100644
--- a/Packages/com.bywaystudios.textmeshpro.ext/package.json
+++ b/Packages/com.bywaystudios.textmeshpro.ext/package.json
@@ -1,7 +1,7 @@
 {
   "name": "com.bywaystudios.textmeshpro.ext",
   "displayName": "TextmeshPro Extension",
-  "version": "0.1.3",
+  "version": "0.1.5",
   "dependencies": {
     "com.unity.textmeshpro": "3.0.9"
   },