feat: add API to provide which kind of information is provided by Sha…

…derInformation

API-Editor/ShaderInformation.cs

@@ -140,6 +140,11 @@ protected ShaderInformation()
         /// </summary>
         internal virtual bool IsInternalInformation => false;
 
+        /// <summary>
+        /// The kind of information provided by this class.
+        /// </summary>
+        public abstract ShaderInformationKind SupportedInformationKind { get; }
+
         /// <summary>
         /// Gets the texture usage information for the material.
         ///
@@ -153,6 +158,27 @@ protected ShaderInformation()
         // note for future this class update: this class is extandable public abstract class so you must not add new abstract method to this class.
     }
 
+    /// <summary>
+    /// The flags to express which information is provided by the ShaderInformation.
+    ///
+    /// It's recommended to provide as much information as possible.
+    /// </summary>
+    [Flags]
+    [PublicAPI]
+    public enum ShaderInformationKind
+    {
+        /// <summary>
+        /// No information
+        /// </summary>
+        None = 0,
+        /// <summary>
+        /// The texture and UV usage information
+        ///
+        /// Providing this information will allow Avatar Optimizer to optimize the texture usage like UV Packing.
+        /// </summary>
+        TextureAndUVUsage = 1,
+    }
+
     /// <summary>
     /// The callback for the texture usage information.
     /// </summary>

Editor/APIInternal/ShaderInformation.Liltoon.cs

@@ -11,6 +11,9 @@ internal class LiltoonShaderInformation : ShaderInformation
 {
     internal override bool IsInternalInformation => true;
 
+    public override ShaderInformationKind SupportedInformationKind =>
+        ShaderInformationKind.TextureAndUVUsage;
+
     static LiltoonShaderInformation()
     {
         Register();