NAME

       sage -  The SDL library for OpenGL extensions.

DESCRIPTION

       #include <sage/sage.h>

       Sage  is  a small C library providing Open GL extensions to applications using SDL. It has
       been automatically generated from the glext.h header file from  the  OpenGL  website.  The
       Sage  source  package  comes  with  the  Perl scripts to generate new sources from updated
       glext.h files.

       Additionally, it provides a way of accessing the standard GL and GLU headers  in  a  cross
       platform  method. sage/GL.h and sage/GLU.h should be used in place of gl/GL.h and gl/GLU.h
       (or the equivalent on other platforms.)

       To use Sage, an application must first call sage_init once the  OpenGL  context  has  been
       created.  This  checks for the existence of each extension it knows about and links up the
       appropriate function pointers. The array sage_ext sets each exension that is found  to  1,
       and  0  otherwise.  Applications  should  check the existence of the extension in sage_ext
       before using it.

       Extensions can then be used by their name as defined in the spec.

BUGS

       Sage does not check to see of the OpenGL context is valid.

       On some systems, the  standard  Open  GL  header  causes  problems  with  sage  (namespace
       conflicts).

       Apparently some broken GL implmentations may report the existence of an extension, but not
       actually provide it. Sage will not detect this.

AUTHOR

       Simon Goodall (simon (at) simongoodall.co.uk)

SEE ALSO

       sage_init(3)

                                        September 22, 2005                                sage(3)