It's not a full answer to your question but I've sometimes found creative solutions to avoid FFI or ports. A good example I saw was someone who wanted to draw s

It's not a full answer to your question but I've sometimes found creative solutions to avoid FFI or ports. A good example I saw was someone who wanted to draw some 3D things generated in an obscure language without GL bindings, so they made a small external program in another language that took textual GL commands on stdin.