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       gl_setcontextvgavirtual - set the context to a virtual mode


       #include <vgagl.h>

       int gl_setcontextvgavirtual(int mode);


       Allocate  a  virtual  screen in system memory identical to the graphics
       mode (as defined in vga_setmode(3)), and make that the current graphics

       The  function  returns  0  for  success and non-zero if the mode is not
       supported by the hardware.

       The only thing you can do with a planar (mode X-like) 256 color mode is
       aligned gl_putbox, and use it as a target for gl_copyscreen.


       svgalib(7),   vgagl(7),   svgalib.conf(5),   threedkit(7),   testgl(1),
       currentcontext(3),   gl_allocatecontext(3),   gl_copyboxfromcontext(3),
       gl_copyboxtocontext(3),       gl_copyscreen(3),      gl_freecontext(3),
       gl_getcontext(3),       gl_setcontext(3),       gl_setcontextheight(3),
       gl_setcontextvga(3), gl_setcontextvirtual(3), gl_setcontextwidth(3).


       This  manual  page  was  edited by Michael Weller <eowmob@exp-math.uni->. 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 <>.

       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.