[SOLUTIONED] Display Sprite (from 4.3) in an EditorWindow

Hello,

I am building a little 2D level editor with Unity 4.3.3. So I have created a custom EditorWindow.

I loaded an atlas and crop the texture from the atlas to create texture representing the sprite.

 Object[] objs = AssetDatabase.LoadAllAssetsAtPath(path);
 Texture2D currentTex = null;
 
 foreach(Object obj in objs) {
     if (obj.GetType()==typeof(Texture2D)) {
         currentTex = (Texture2D)obj;
         // test if the texture is readable
         try
         {
            currentTex.GetPixels32();
         }
         catch (UnityException e)
         {
             Debug.Log ("texture is not readable: " + path);
         }
     } else if (obj.GetType()==typeof(Sprite)) {
         Sprite sprite = (Sprite)obj;
         Color[] pixels = currentTex.GetPixels(
                             (int)sprite.rect.x,
                             (int)sprite.rect.y,
                             (int)sprite.rect.width,
                             (int)sprite.rect.height);
            Texture2D tcropped = new Texture2D(
                                 (int)sprite.rect.width,
                                 (int)sprite.rect.height);
         tcropped.SetPixels(pixels);
         tcropped.Apply();
         textures.Add (tcropped);
     }
 }
 

And then I display the sprites

             
scrollViewPos = GUILayout.BeginScrollView(scrollViewPos);
foreach (Texture2D tex in textures) {
    rect = EditorGUILayout.BeginHorizontal();
    if (GUILayout.Button(sitem.tex)) {
    }
    EditorGUILayout.EndHorizontal();
}
GUILayout.EndScrollView();

The problem with this solution is my texture atlas has to be readable. I do not want my texture to be readable during runtime for performance/memory issues and I did not find any solution to change it just for the texture I am loading in my editor. I try to use "processor" but it used during import processus not when I am loading files.

Another solution is to find another way to retrieve the preview texture of the sprite.

Any one has a solution ?

I found a solution Ok. The solution is simply to retrieve the texture importer, modify it and reimport the asset if necessary and restore it when the editor is closed.

             TextureImporter textureImporter = AssetImporter.GetAtPath("Assets/Sprites/"+f.Name) as TextureImporter;
             if (textureImporter.isReadable==false) {
                 Debug.Log (f.Name + " is not readable. Update it and reimport it.");
                 textureImporter.isReadable = true;
                 AssetDatabase.ImportAsset("Assets/Sprites/"+f.Name,ImportAssetOptions.ForceUpdate);
                 texturesReImported.Add ("Assets/Sprites/"+f.Name);
             }

Regards,

Nicolas