A sub-process of my current project needs to do some off-screen renderings (and fetch the resulting pixel data for later calculations). Therefore the ability to create OpenGL context without windows is required, then later I can create an FBO and render to it.
I've crafted a simple(maybe naive and buggy) but working code for Xorg in Linux for my personal usage. I'm willing implement it for common platforms in my free-time (maybe weeks later) and contribute it to freeglut.
Do you think this feature is necessary for freeglut?