OpenGL Reference

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Documentation for the OpenGL API, version 4.5 core, is available on this wiki. It can be found on this page. These pages describe each function in the OpenGL 4.5 API.

The text boxes in the upper-right corner explain when the function was introduced and some of the etymology behind that function. So if you see that a function was introduced into the OpenGL API in version 2.1, then you know it will be available in version 3.2, 4.0, or whenever. However, the function may have reduced functionality in versions lower than 4.5. For example, before version 3.0, glTexImage2D did not take integral image formats.

If you are interested in GL 2.1 or compatibility documentation, that can be found on the OpenGL website. Documentation for GLSL standard functions can likewise be found on that website.