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gl_getcontext(3)	      Svgalib User Manual	      gl_getcontext(3)

NAME
       gl_getcontext, currentcontext - get the current graphics contents.

SYNOPSIS
       #include <vgagl.h>

       void gl_getcontext(GraphicsContext *gc);

       extern GraphicsContext currentcontext; /* this is already in vgagl.h */

DESCRIPTION
       Save the current context in the structure variable gc.

       You  can also get the current context from the global variable current‐
       context;

       However, simply access single  elements	in  this  structure  with  the
       macros  given  in  vgagl(7)  but	 do not copy currentcontext in another
       structure. This is because the size of the structure might  change  and
       your  program  does  not	 know it when it will be linked dynamically to
       future svgalib versions.

       Instead use gl_allocatecontext(3) to allocate such a structure, fill it
       with gl_getcontext and release it with free(3) after usage.

SEE ALSO
       svgalib(7),   vgagl(7),	 svgalib.conf(5),   threedkit(7),   testgl(1),
       plane(1), wrapdemo(1), gl_allocatecontext(3), gl_copyboxfromcontext(3),
       gl_copyboxtocontext(3), gl_freecontext(3), gl_setcontext(3), gl_setcon‐
       textheight(3), gl_setcontextvga(3), gl_setcontextvgavirtual(3), gl_set‐
       contextvirtual(3), gl_setcontextwidth(3).

AUTHOR
       This  manual  page  was	edited by Michael Weller <eowmob@exp-math.uni-
       essen.de>. The exact source of the referenced demo as well  as  of  the
       original documentation is unknown.

       It is very likely that both are at least to some extent are due to Harm
       Hanemaayer <H.Hanemaayer@inter.nl.net>.

       Occasionally this might be wrong. I hereby asked to be excused  by  the
       original author and will happily accept any additions or corrections to
       this first version of the svgalib manual.

Svgalib (>= 1.2.11)		  2 Aug 1997		      gl_getcontext(3)
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