- Write all from scratch. Much work.
- Find a lib compatible by code (C89) and licence (BSD:good , GPL:evil). I don't know any. Hints are welcome

- Add just a "VGA-like" font text - easy, but not very useful on images >>1000 pixels in size.
- Use a "VGA-like" font, zoom it up using NN - easy, but not very professional, but IMHO better than nothing.
- Use a "VGA-like" font, zoom it up using Lanczos - easy, tested, looks fairly good


- Use my "zoomable text" code. Better than NN, but not as "professional" as someone might expect ...