Custom TextureImporterInspector

Unity Engine
1

Good day everyone. Just want to share some code if anyone in need for it. Recently i was working on extending import of some supported image formats so i came in need for a custom TextureImporterInspector. The problem was to show custom Inspector for some formats and usual for others. So here is the solution based on some reflection black magic:

[CustomEditor(typeof(TextureImporter))]
public class TextureImporterCustomEditor : Editor
{
    private SerializedObject serializedTarget;

    private Editor nativeEditor;

    public void OnEnable()
    {
        serializedTarget = new SerializedObject(target);
        SceneView.onSceneGUIDelegate = TargetUpdate;     
    
        Type t = null;   
        foreach (Assembly assembly in AppDomain.CurrentDomain.GetAssemblies())
        {
            foreach (Type type in assembly.GetTypes())
            {
                if (type.Name.ToLower().Contains("textureimporterinspector"))
                {
                    t = type;
                    break;
                }
            }
        }

        nativeEditor = Editor.CreateEditor(serializedObject.targetObject, t);
    }

    void TargetUpdate(SceneView sceneview)
    {
        Event e = Event.current;
    }

    public override void OnInspectorGUI()
    {
        if (nativeEditor != null)
        {     
            bool isCustom = // check  ((TextureImporter)serializedObject.targetObject).assetPath for file formats you need
            if (isCustom)
            {
              // Do your stuff here
              // you can use ((TextureImporter)serializedObject.targetObject).userData to store your stuff between sessions
            }
            else
              nativeEditor.OnInspectorGUI();        
        }
  
        // Unfortuanaly we cant hide ImportedObject section because InspectorWindow check it by
        //  if (editor is AssetImporterEditor) and all flags that this check sets are method local variables
        //  so aside from direct patching UnityEditor.dll no luck for reflection here :(
     
        //  in my case i just moved ImportedObject section out of view
        GUILayout.Space(2048);       

        SceneView.RepaintAll();
    }
    protected override void OnHeaderGUI()
    {   
         // We cant use nativeEditor.OnHeaderGUI because some internal variables not sets correctly by:
         // Editor.CreateEditor so do some stuff to emulate native inspector header or customize it for your likes
    }
}
5 Likes
2

it works , I have been searching for a long time for this, thx:)

3

wow

it works!!

I applaud you:smile:

4

It worked kinda… the Apply and Revert buttons disappear using the script. Any help?

Edit: I ended up writing apply and reset on my own.

5

Just in case it is still useful for someone, you probably lacked this call: https://docs.unity3d.com/ScriptReference/AssetImporters.AssetImporterEditor.ApplyRevertGUI.html