Geometry and compute kernels

TODO: Exploring how, if at all, additional pipeline stages would fit (when even available), such as geometry or compute kernels, or hull, domain, tessellation, etc. How would input be set up? Are there ways to make this more of a plugin thing? (There are compute libraries decoupled from the graphics APIs, for instance, but then what do they need to speak to each other?)

TODO 2: Compute actually looks totally feasible, when available, but have to keep in mind the possible change to Metal, Vulkan, etc. Will flesh this out a bit now too, maybe in own page?

This is very low-priority, mostly speculative, although maybe compute would be low-to-medium.