Not exactly what you’re looking for (this doesn’t generate an image from a spec/protocol), but I created a simple image encoding in ASCII and editor that genera

Not exactly what you’re looking for (this doesn’t generate an image from a spec/protocol), but I created a simple image encoding in ASCII and editor that generates PNG (choose “Still” instead of “Wobble”): https://memalign.github.io/m/pceimage/index.html https://memalign.github.io/m/pceimage/index.html I made this so I can embed images in code.