Confusion between OPEN GL ES and EGL library

Question

I was reading android source code in that I am not getting what does OPEN GL ES library do and what does EGL library do.?

Is there any relationship between this two libraries?

I have looked at http://www.khronos.org/opengles/documentation/opengles1_0/html/ but still not getting.

Crude analogy : `OpenGLES` provides you the brush, the colour paint & the stencil while `EGL` will get you the canvas/paper to paint on. — another.anon.coward, Jan 19 '12 at 08:22
wov...if i would ever accept any comment as answer then i will accept ur comment...!!! — Jeegar Patel, Jan 19 '12 at 10:34

score 7 · Accepted Answer · answered Jan 19 '12 at 08:07

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EGL is the interface between OpenGL ES and the underlying native display platform. It is used to create & manage rendering surfaces & graphics contexts.

answered Jan 19 '12 at 08:07

Ronny Vindenes

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score 4 · Answer 2 · answered Jan 19 '12 at 08:03

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EGL is used to manage the various display buffers (ie: images you see on the screen) and the OpenGL ES context. These are necessary to use OpenGL ES. So you can think of EGL as an initialization layer for OpenGL ES.

answered Jan 19 '12 at 08:03

Nicol Bolas

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score 3 · Answer 3 · answered Jan 19 '12 at 08:46

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If you are familiar with programming OpenGL on Windows, MacOSX or Linux - EGL is similar as what WGL is on Windows, GLX is on Linux and what AGL/CGL is on MacOSX.

answered Jan 19 '12 at 08:46

Mārtiņš Možeiko

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score 3 · Answer 4 · edited May 23 '17 at 12:11

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Note that desktop OpenGL has no interaction with EGL, only OpenglES and OpenVG. Take a look here: Can anyone explain the way the "Khronos stack" of technologies fits together?

edited May 23 '17 at 12:11

Community

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answered Jan 20 '12 at 12:01

Mandark

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Jav_Rock · Answer 5 · 2012-01-19T08:17:02.813

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Open GL is basically an API for creating applications that draw 2D and 3D graphics. EGL allows you to render APIs like OpenGL. You have many pages explaining this, not difficult to find if you google OpenGL and EGL. For example at khronos.

edited Jan 19 '12 at 08:17

answered Jan 19 '12 at 08:09

Jav_Rock

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Confusion between OPEN GL ES and EGL library

5 Answers5