gl_setcontextvgavirtual(3) mojave man page | unix.com

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 graph-
       ics 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_setcon-
       textvga(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)