ThorVG might be worth a look - open source (MIT), ~150KB core, GPU backends (WebGPU, OpenGL).
We are using it as official dotLottie runtimes, now a Linux Foundation project. Handles SVG, Lottie, fonts, effects.
https://github.com/thorvg/thorvg/
In terms of performance, it's quite far from something like Blend2D or Vello though.
In terms of performance, it's quite far from something like Blend2D or Vello though.