Framebuffer
A Framebuffer is a series of images that can be used as the destination for rendering. OpenGL has two kinds of framebuffers: the Default Framebuffer, which is provided by the OpenGL Context; and user-created framebuffers called Framebuffer Objects (FBOs). The images for default framebuffers are part of the context and usually represent a window or display device. The images for FBOs come from either Textures or Renderbuffers, and are never visible.
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