Nice work! I’d love to hear about your goals with this project, do you want to get it into PDF or browser engines, or anything like that?

Mark Kilgard surveyed some path rendering engines with a few curves that most have trouble with. It’d be fun to see how Rasterizer stacks up, and perhaps a nice bragging point if you dominate the competition. https://arxiv.org/pdf/2007.12254

Having used the quadratic solver code that you found on ShaderToy (sqBezier), you might be able to shave some cycles by doing a constant-folding pass on the code. It can be simplified from the state it’s in. Also the constant in there 1.73205 is just sqrt(3), and IMO it’s nicer to see the sqrt(3) than the constant, and it won’t slow anything down, the compiler will compute the constant for you. Also, it might be nice to additionally link to the original source of that code on pouet.