You can't write to the framebuffer device while X11 is running because it will just get overwritten immediately. So that means you can only use it on a machine without a display server running. So... a web server maybe? Sure, but since most people use a web server by SSH'ing into it, a program that writes to framebuffer devices is going to be useless, unless you have a physical display device connected to the server and want to display something on it remotely.
So it's mostly a fun gimmick/curiosity. I wrote a realtime 3D rasterizer that renders to fbdev a while back. It was a fun project, but useless.
So it's mostly a fun gimmick/curiosity. I wrote a realtime 3D rasterizer that renders to fbdev a while back. It was a fun project, but useless.