How to go from TextureImporterFormat to TextureFormat?

In short; I need to get the corresponding TextureFormat for any TextureImporterFormat.

I'm writing an AssetPostprocessor;
in the OnPostprocessTexture(Texture2D texture) function I want to compress the texture in the textureformat defined in the editor (in the TextureImporter), like it would if I didn't do anything in this function.

However, the compression function (EditorUtility.CompressTexture()) expects the format to be of type TextureFormat, but the only format I can get is of type TextureImporterFormat.

How do I get from the one to the other?

Or how can I avoid this problem alltogether?

I'm doing it manually now, which is a pain the ass. especially since it differs depending on the version of Unity, which also means it could change with any new Unity update.

 

You can use TextureImporter to import the asset, don't use EditorUtility.CompressTexture()

 

I don't think you understand the case;
I don't want to reimport the texture, I want to compress it.
What I'm writing happens right after a texture is imported, so letting it then reimport the texture again is completely useless.

Unless Im misunderstanding you?

 

Now it appears the entire EditorUtility.CompressTexture() function no longer works (throws an error),
which means the manual fix I made no longer works as well (as I just can't do any compression now).

I reported it as a bug, but I got no response.

I really need this to work, so a reply from Unity or someone else who knows something about this would be much appreciated.