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 currentcontext;

       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_setcontextheight(3),    gl_setcontextvga(3),
       gl_setcontextvgavirtual(3), gl_setcontextvirtual(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.