Window System and Platform Integration
The OpenGL API is primarily concerned with accepting procedural scene descriptions and generating pixels corresponding to those descriptions. The OpenGL specification per se doesn’t say where the generated pixels will end up. The final step of sending pixels to their target, such as a window on the screen, is left up to the embedding or platform layer. This layer defines how the OpenGL renderer attaches or binds onto the output device or devices. There can be many possible window system targets; defining this interface is the task of the window system, not the OpenGL rendering pipeline. Most window systems have a specification that defines the OpenGL interaction. Some of these specifications, ...
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