Looks nice! My game engine doesn't support anything else than .ttf if i remember correctly. But i will give it a go and maybe write some code to asapt to other formats!
Everything is working nice so far! When i run applications on my engine, windows console appears, it's there for debugging and stuff but i wanted to keep it for engine messages and in game messages will appear on the game screen with your nice looking font! Sdl2 does not support shaders though and i have to render seperate text as an outline, but that's a minor inconvienience. I may be posting an alpha of my project soon. And when i do i will inform you!