feat: TextMeshPro support

BREAKING CHANGE: TextMeshPro support is now an option.
If a shader or material has errors after a version upgrade, you will need to import the asset.
Please see the README for more information.

Packages/SoftMaskForUGUI/Samples/TextMeshPro Support/TMP_SDF (SoftMaskable).shader.meta

@@ -1,7 +1,9 @@
 fileFormatVersion: 2
 guid: 935b7be1c88464d2eb87204fdfab5a38
 ShaderImporter:
+  externalObjects: {}
   defaultTextures: []
+  nonModifiableTextures: []
   userData: 
   assetBundleName: 
   assetBundleVariant: 

Packages/SoftMaskForUGUI/Samples/TextMeshPro Support/TMP_SDF-Mobile (SoftMaskable).shader.meta

@@ -1,7 +1,9 @@
 fileFormatVersion: 2
 guid: e65241fa80a374114b3f55ed746c04d9
 ShaderImporter:
+  externalObjects: {}
   defaultTextures: []
+  nonModifiableTextures: []
   userData: 
   assetBundleName: 
   assetBundleVariant: 

Packages/SoftMaskForUGUI/Samples/TextMeshPro Support/TMP_Sprite (SoftMaskable).shader.meta

@@ -1,9 +1,9 @@
 fileFormatVersion: 2
 guid: 94593ebff37d04a64936ebe46ce7e769
-timeCreated: 1450517184
-licenseType: Pro
 ShaderImporter:
+  externalObjects: {}
   defaultTextures: []
+  nonModifiableTextures: []
   userData: 
   assetBundleName: 
   assetBundleVariant: 

Packages/SoftMaskForUGUI/Scripts/Editor/ImportSampleMenu.cs

@@ -8,13 +8,18 @@ namespace Coffee.UISoftMask
 {
     public static class ImportSampleMenu
     {
-        [MenuItem("Assets/Samples/Import UISoftMask Sample")]
+        private const string jsonGuid = "c43fd233e88b347cdabc530c23ffe30a";
-        private static void ImportSample()
-        {
-            const string jsonGuid = "c43fd233e88b347cdabc530c23ffe30a";
-            const string dirName = "Demo";
 
-            ImportSample(jsonGuid, dirName);
+        [MenuItem("Assets/Samples/UISoftMask/Import Demo")]
+        private static void ImportDemo()
+        {
+            ImportSample(jsonGuid, "Demo");
+        }
+
+        [MenuItem("Assets/Samples/UISoftMask/Import TextMeshPro Support")]
+        private static void ImportTextMeshProSupport()
+        {
+            ImportSample(jsonGuid, "TextMeshProSupport");
         }
 
         private static void ImportSample(string jsonGuid, string sampleName)

Packages/SoftMaskForUGUI/package.json

@@ -24,6 +24,11 @@
       "displayName": "Demo",
       "description": "UI Soft Mask Demo",
       "path": "Samples~/Demo"
+    },
+    {
+      "displayName": "TextMeshPro Support",
+      "description": "TextMeshPro Support",
+      "path": "Samples~/TextMeshPro Support"
     }
   ]
 }