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Date:	Fri, 02 Feb 2001 14:33:11 -0500
To:	cygwin AT sources DOT redhat DOT com
From:	Andre Bleau <bleau AT igb DOT umontreal DOT ca>
Subject:	Re: OpenGL Extensions
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X-MIME-Autoconverted:	from quoted-printable to 8bit by delorie.com id OAA08737

>I want to use following extensions:
>glLockArraysEXT( GLint first, GLsizei count );
>glUnlockArraysEXT( void );
>
>My card supports EXT_compiled_vertex_arrays.  I tried to follow a GL extension
>manual 
>(http://reality.sgi.com/blythe/sig99/advanced99/notes/node396.html), but
>it didn't work. What to do?
>

Cygwin's OpenGL implementation is just a repackaging of Micro$oft 
implemention, which do not support extensions. The html doc you mentionned 
suggests a sensible way to get around the problem, but I didn't try it 
myself, having no card specific extensions to load.

One problem with the suggested code might be that it is written for Visual 
C++, which has _WIN32 defined. The last version of gcc for Cygwin 
(2.92.2-7) has _WIN32 undefined by default; try compiling with -mwin32. If 
you still encounter problems, please report to this list the complete error 
messages you receive, instead of just saying "it didn't work".

Regards,

André Bleau, Cygwin's OpenGL maintainer.


André Bleau, ing., associé de recherche
bleau AT igb DOT umontreal DOT ca

Laboratoire de recherche en Imagerie et en Orthopédie
École de Technologie Supérieure


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