Provided by: libsvga1-dev_1.4.3-31_amd64 bug

NAME

       gl_setcontextvgavirtual - set the context to a virtual mode

SYNOPSIS

       #include <vgagl.h>

       int gl_setcontextvgavirtual(int mode);

DESCRIPTION

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

       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.

SEE ALSO

       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).

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.