title: What is the relationship between EGL and OpenGL?
body: <p>I'm writing an implementation for <a href="http://www.khronos.org/openvg/" rel="noreferrer">OpenVG</a> and <a href="http://www.khronos.org/opengles/" rel="noreferrer">OpenGL|ES</a> in <a href="http://golang.org" rel="noreferrer">Go</a>, both of which depend on the <a href="http://www.khronos.org/egl/" rel="noreferrer">Khronos EGL API</a>, supposedly to ease portability I guess.  </p>
  
  <p>I'm writing an implementation of OpenVG on top of OpenGL ES for fun and educational reasons - I haven't done a lot of rendering work and I'd like to learn more about the open APIs and practice implementing well defined standards (easier to see if I got the right results). </p>
  
  <p>As I understand it, EGL provides a standard API for retrieving a drawing context (or what ever it's rightly called,) instead of using one of the multiple OS provided APIs (GLX, WGL etc)</p>
  
  <p><img src="https://i.stack.imgur.com/fopop.jpg" alt="enter image description here"></p>
  
  <p>I have a hard time believing Khronos would go through such effort and leave the standard OpenGL out of the loop but the thing is, I haven't found how or if OpenGL (the real deal) interfaces with EGL or if it's only OpenGL ES. If OpenGL ES can use the drawing context from EGL, would standard OpenGL also work?</p>
  
  <p>I'm really new to all of this which is why I'm excited but the real project I'm doing is a Go widget toolkit that utilizes OpenVG for its drawing operations and uses hardware acceleration wherever possible. </p>
  
  <p>If OpenVG, OpenGL and OpenGL ES depend on EGL, I think my question can be answered with  "yes" or "no". Just keep in mind that I dove into this subject head-first last night. </p>
  
  <p>Does OpenGL use or depend on EGL? </p>
  
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  <p>Off topic, but there is no EGL tag. Should there be?</p>