Custom drawable as badge

We want to show not a number but just an image as the badge. For example, an exclamation mark as error or spinner as a progress indicator. I've tried a workaround to pass drawable as a background of the badge and the empty string as badge text. That doesn't work well since it is stretching the drawable:

Are there good solution for our problem?

Start in the repository's badge rendering path and inspect how a drawable supplied as the badge background is measured and drawn. The issue's screenshot and workaround show the current stretching behavior; done means an image badge can be displayed without distortion, alongside the existing text badge behavior.

Written by the indexing model from the issue text.