Hi,
I have written a simple OpenGL binding for angelscript and thought it might be useful to some of you. It is available on GitHub:
https://github.com/bluecataudio/angelscript-addons/tree/master/cpp
It currently covers only the basic OpenGL 1.0 APIs and does not handle functions using arrays nor bitmaps, but it works pretty well for 2D drawing or simple shapes without textures. Also, generic calling convention has not been implemented since I do not use it.
Note: it is just a binding of the OpenGL API, so it requires that you already have an OPenGL context made available to the script.