OpenGL attrib_list support

[Andreas Hartmetz]

On Wednesday 03 July 2013 13:38:37 Alexander Monakov wrote:
> On Wed, 3 Jul 2013, Andreas Hartmetz wrote:
> > Hello list,
> > 
> > I've been trying to implement attrib_list support for a few days now and
> > I've run out of approaches that aren't ugly or intrusive.
> > (attrib_list is an array of ints interpreted as key-value pairs where the
> > key is an enum value and the value's interpreted type depends on the key;
> > it is usually int, enum, or bitfield.)
> 
> What's worse, for Xlib-style attrib lists (glXChooseVisual), some keys stand
> on their own and don't have a corresponding value.
> 
> I would duplicate existing Array type into XAttribArray and GLXAttribArray
> and write custom visitors for those.  Those visitors would hand off to
> existing Array visitors, except where I would need a different behavior
> (trace dumping, GUI).
> 
> Alexander

Thanks Alexander for your help here and on IRC. I've created a pull request 
that might need some discussion still because there are a few choices to make 
in the implementation.

https://github.com/apitrace/apitrace/pull/160

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