raqote VS canvas

There's several different approaches you could take, but I'd probably suggest macroquad as the easiest. I've also used minifb for windowing + a drawing library like raqote or tiny-skia.

You may specify font family by adding a line font = "Source Sans Pro" into a config file (path is $HOME/.config/yofi/yofi.config). Though, perhaps you meant "Source Code Pro" which is unfortunately broken in third-party rendering library. You may specify font size similarly with font_size = 12 line, though the binary from the last release doesn't support it yet, so you either may built yofi from master (as simple as cargo b --release), or wait for the next release (I think it will be on this week).

I wanted to share a recent large update to https://github.com/tdewolff/canvas, which is a vector graphics library written in Go to create images, PDFs, SVGs, OpenGL, etc. using vector drawing operations. Especially I wanted to show two new exciting features:

It appears that there's a port of Cairo to Go which also targets webassembly. https://github.com/tdewolff/canvas

https://github.com/tdewolff/canvas/blob/master/examples/opengl/main.go can draw primitves but i think it would be a bit hard to do event based animation

Yes! See https://github.com/tdewolff/canvas/tree/master/examples/gonum-plot for an example using gonum-plot. You should be able to plug-and-play to use the canvas library!