[lsb-discuss] libGL versioning & ABI (was Re: libGLU?)

Robert Schweikert robert.schweikert at mathworks.com
Mon Jul 9 14:16:17 PDT 2007


I am not a GL expert, but I believe that GL 1.5 is a superset of 1.2, 
thus adding the additional calls to the LSB should be relatively easy. I 
suspect that adding the 2.1 interfaces would also work as all 
distributions probably ship libGL with the 2.1 interfaces already.

Robert

Jon Leech wrote:
> On Mon, Jul 09, 2007 at 01:51:10PM -0700, Wichmann, Mats D wrote:
>   
>> I've been told that at some point we really need to
>> converge on OpenGL 2.1.  How hard it would be to
>> get there is a question I have no insight into.
>>     
>
>     It would not be realistic to require OpenGL 2.1 support at runtime.
> Only graphics cards from the last year or so can support it, and even
> those that can, do not necessarily actually have drivers for it. IIRC,
> AMD is lagging in 2.1 support, probably because they've been focused on
> revamping their unified driver architecture.
>
>     But it would be reasonable to require that all the 2.1 entry points
> exist in libGL, and mandate lower version support in the drivers at
> runtime. Last I looked I think OpenGL 1.5 was a reasonable target - many
> Intel integrated graphics chipsets support that, and they're the lowest
> class of widely used hardware - but the exercise I mentioned does need
> to be conducted. OpenGL 1.5 would still be a big improvement over the 9
> years old 1.2 that's currently required by the ABI :-)
>
>     Jon
>
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>   

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Robert Schweikert                       MAY THE SOURCE BE WITH YOU
(robert.schweikert at mathworks.com)                 LINUX
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