egl MESA up on dumb framebuffer

[Brian Paul]

Jon Smirl wrote:
> I just checked in code that implements the MESA egl extensions on top
> of an fbdev device.
> 
> I don't think I have everything set up right for MESA maybe the mesa
> experts can help out. It does draw but not all of the colors seem to
> be coming out right.
> 
> Next I'm going to look at bringing XGL up.
> 
> Dave, maybe you can get this up on the radeon driver? It is actually
> not that hard now that renderbuffer support is in.
> 
> I haven't implemented pbuffers in the code I checked in. It shouldn't
> be too hard, I just need to make a little memory manager for VRAM. Of
> course pbuffers don't get you anything on fbdev.

For now, we could simply use software-based pbuffers using the new 
renderbuffer code.  I could take a stab at that.

-Brian