Comment by johnvega

"For most cases, you do all the actual rendering work in GL or GLES contexts, which you create with WGL, CGL, GLX, or EGL, depending on your platform.

GL and GLES do the actual rendering. EGL and friends are basically just the glue layer to get things to the screen. (Well, to the window manager)"

https://www.reddit.com/r/opengl/comments/11q0oz/what_is_the_...