Re: eXene and openGL

You know - SDL doesn't seem to require callbacks.  I was almost sure  
that it did.
This makes SDL a really nice way to go.  Fast direct graphics  
interface, without callbacks.

I looked at the MLton interface to SDL (again - I already did some  
time ago) but it doesn't seem to be doing much.

hmmmm....

Shouldn't take much work to see what nlffi thinks of the SDL header  
files :-)

Brian


On Jan 3, 2007, at 7:06 AM, John Reppy wrote:

> EXene is now being supported and developed by Ally Stoughton and his
> students,
> so they may be able to help you get the examples working.
>
> I'm not particularly optimistic about supporting OpenGL in EXene.
> While it would
> be possible to implement the GLX wire protocol [Historical note: when
> I was actively
> working on eXene in the 90's, the protocol was not documented, but
> SGI eventually
> released it] in eXene, there are significant performance
> disadvantages to using
> that protocol.  For real-time rendering, you want a DRI-style
> implementation, but
> I don't know how to support such an approach in eXene.
>
> For a while, I've thought that the low-level parts of eXene ought to
> be rewritten
> to sit on top of a C shim (XCB is an obvious choice).  Doing so
> should make it easier
> to connect to more modern X extensions, such as the render extension
> and GLX.
>
> An alternative approach is to build a GUI library on top of GLUT (or
> SDL).  I've been
> working on this project using mlton, since SML/NJ doesn't have
> callback support, but
> I'm hoping that we'll get the necessary hooks in SML/NJ soon.
>
> 	- John
>
> On Jan 3, 2007, at 6:40 AM, brian wrote:
>
>> So as I slog through X code to make openGL useful it occurs to me
>> that using eXene with openGL tied in would be a really nice way to
>> go. eXene3D :-)
>>
>> There are a couple of problems:
>>
>> 1 I still can't get eXene examples to work.
>>
>> 2 Is there a gotcha in terms of the X interface which eXene uses and
>> openGL ? eXene uses the socket level interface and I'm not sure what
>> that implies for use with openGL.  Wthout thinking too hard, I don't
>> think it implies anything.  I simply invoke glX calls using the
>> display, window, etc.. I get from the eXene interface.
>>
>> Solving 1 is just a matter of time and persistence on my part.
>>
>> Understanding 2 is much more important.  Since I'll probably have to
>> do considerable work for 1, I don't want to get to the end of the
>> path and find out that there will be some problem connecting eXene/
>> openGL.
>>
>> At first I thought that the use of threading might be a problem, but
>> since they are "user level" threads, doesn't seem like that should be
>> an issue.
>>
>> Any opinions ?
>>
>>
>> Brian
>>
>>
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