I don't think so. I haven't had time to look at it further myself and to my knowledge no one else has played around with it.
There are two main ways I see ahead of time, without having really looked into it:
1. Something in the MuPDF API, which is fairly legibly documented here:
https://ghostscript.com/%7Erobin/mupdf_explored.pdf (also see my earlier message)
2. Something with CSS.