[yunnpp]

At least with SDL3, you don't even need the renderer or the texture anymore. SDL_GetWindowSurface to get the surface and SDL_UpdateWindowSurface to present. That's the more software-graphics you can get from my understanding of the library. SDL still does the double-buffering for you.

[TazeTSchnitzel]

SDL has always made it easy to directly present a software buffer of pixels to the screen. I'm not sure why someone would want to use the renderer/texture thing for this use case.