OpenGL ES renderer Support

Hi,

I needed some help from the community in terms of possible
hindrances/pitfalls in supporting openGL ES renderer for Crystalspace 3D.

The primary differences between OpenGL and OpenGL ES, seems to be the
following:

   -

   There is no support for glBegin or glEnd.
   -

   The only supported rasterization primitives are points, lines and
   triangles. Quads are not supported.
   -

   There is no polynomial function evaluation stage.
   -

   One cannot send blocks of fragments directly to individual fragment
   operations.
   -

   There is no support for display lists.

RlyDontKnow, did told me about the use of glBegin and glEnd to implement
DrawPixMap, which I would probably have to rewrite using VextexBuffers or
Vertex Array.

Also for quads, Jorrit suggested that we can probably overload the Quad
functions by using two triangles to draw a Quad.

Is there anything else which you guys can think of, off the top of your
head which will obviously not work with the following limitations ?

Regards,

Mohit Taneja

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