Looking for framebuffer documentation

Hey,

I recently became a somewhat satisfied owner of a PB Basic Lux 4. Even managed to write some basic GUI apps with C using inkview, but I would love to get fyne (golang GUI framework) to work on this. That would open up many doors and I would be able to write GUI apps in golang.

I took a quick look at libinkview and if I am not mistaken, it doesn't open the framebuffer (fb0) directly, but calls out to libhwconfig.so which opens the device and initializes it.

Is there some docs about the exact commands, what to write, how to initialize whatsoever? I have a very simple use-case. I have a buffer I want to write and I want to display that on the screen directly from golang.

I saw the insane work that was put into https://github.com/NiLuJe/FBInk, but it's not PB specific and quite large... Is there any other resource I could look at? What would you recommend?

I do not have too much experience in this, but I am willing to learn. :)

Thanks