piet VS embedded-graphics

You can even check https://github.com/linebender/piet and https://github.com/RazrFalcon/tiny-skia. They are pure rust libraries. Skia as a whole is a big binary to add.

First, at the deepest level, we are moving away from Piet, which is a cross-platform 2D graphics abstraction. Under the hood it uses whatever the standard OS API is. Instead we will be using Vello which we have been building as a research project for years already. It is starting to near its v0.1, which is very exciting. Fundamentally it is a novel GPU accelerated 2D rendering engine with a strong focus on performance. It is not ready for benchmarks yet, but we're confident it will deliver. If you're curious, you can check out the Vello roadmap for 2023.

you can use piet, although that is more of an abstraction over existing, platform-dependent libraries. So not really pure rust, but definitely cross-platform.

Piet is the backend for the Druid UI framework. It is indeed cross-platform. The SVG backend looks like it would work without an OS, but I'm not sure the value of a GUI toolkit without an OS anyway :)

https://github.com/linebender/piet#backends

https://github.com/linebender/druid/tree/master/druid-shell/...

Piet can render text. You can use Piet_common with the BitMapTarget to generate images Here is an example.

Piet (https://github.com/linebender/piet) should work.

So the 3 I'm looking at right now are 1. druid 1. piet 1. bevy

It relies on piet 2D graphic library; on Linux that means GTK/Cairo 2D primitives

You may be interested in taking a look at piet!

Even if one used embedded-graphics, which would't require a line buffer, 8k is probably not enough RAM for the stack of a non-trivial Rust program. At least my even fairly simple RTIC programs that run fine in the 160k of a Feather M4 do not run at all in the 32k of a Feather M0.

I rewrote the font subsystem of U8g2 in pure Rust, introducing a large number of fonts to embedded-graphics.

Another project I've used is embedded-graphics which is useful if your target has more limited resources: https://github.com/embedded-graphics/embedded-graphics

We use it a bit for https://github.com/embedded-graphics/embedded-graphics and I have to say I love it. It's just the right balance between configuration variables/constants and "a folder full of bash scripts". I highly recommend giving Just a try.