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gl_setcontextvgavirtual(3)    Svgalib User Manual   gl_setcontextvgavirtual(3)

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 sup‐
       ported 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), cur‐
       rentcontext(3),	  gl_allocatecontext(3),     gl_copyboxfromcontext(3),
       gl_copyboxtocontext(3), gl_copyscreen(3), gl_freecontext(3), gl_getcon‐
       text(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.

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