Then you can do whatever you want, or, more realistically, grab an open source alterna-rendered that does something close to, but not quite exactly, what you want, but close enough.
It's a lot of work to get there from here, but all the forces push that way and I expect it will happen, even if it takes another decade.
Reserve your seats now for the inevitable progression of HN stories, roughly by year:
1. Show HN: My Alterna-render Renders Text Around Arbitrary Images
2. Layout.rs: A Minimal Alterna-Renderer In Rust
3. Layout.rs Has Gotten Too Bloated
4. Why You Should Stop Using Alterna-Renderers And Just Use HTML+CSS
5. Facebook's App Reaches 5 Gigabytes of Rendering Code
6. When to use and not use an alternative renderer
