Another small optimization: aglMacro

[James W. W. <os...@jw...>]

On the OpenGL list, it has been mentioned that one can get a small 
performance boost by using the macro interfaces to OpenGL.  Basically, 
this means that instead of relying on a current context, you pass the 
OpenGL context to each OpenGL call.  Macro definitions hide the extra 
parameters, so that the individual calls to OpenGL do not look any 
different.  However some Quesa internal functions would need an extra 
parameter.  I expect that in most cases the gain would be small, maybe 
1%.  However the "multibox" test went up from 4.7 FPS to 5.0 FPS with 
this change.  This would not affect platforms other than Mac.  Any 
comments, or objections to my checking it in?
--
<http://www.jwwalker.com/>