Minimal Cross-Platform Graphics

Single-header library available on Github: https://github.com/zserge/fenster

Nb. found via lobste.rs but thread dead there so worth an HN post since content is absolutely superb (as is usual from zserge!)

What would an equivalent minimal accelerated 2D or 3D library be? For Java I know there's libGdx, LWJGL, and jMonkeyEngine.