OpenGL: Display Memory, Offscreen Memory, and the Framebuffer? I'm getting this information from the Orange Book 3rd edition, which OpenGL 3.2( I think ) was the latest release at the time it was released. They do talk about display and offscreen memeory, but It sounds to me from your post that all of this resides in the default frame buffer. Display memory being the front buffer and offscreen memory being everything else in the frame buffer. Is that safe to assume?