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gl_setcontextvga(3)           Svgalib User Manual          gl_setcontextvga(3)


NAME

       gl_setcontextvga - set the context to the physical screen


SYNOPSIS

       #include <vgagl.h>

       int gl_setcontextvga(int mode);


DESCRIPTION

       Set the graphics context to the physical screen of a vga mode (as
       defined in vga_setmode(3)).  The mode must be set with vga_setmode(3)
       prior to using any of the drawing functions.  vgagl does not take care
       of that.

       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.

       In all of the svga modes this program makes a description of the vga
       mode available to the vgagl functions.  The 256 color svgamodes are
       handled properly by this program.


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_line(3), gl_getcontext(3), gl_setcontext(3), gl_setcontextheight(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.  This page was modified by Don
       Secrest <secrest@uiuc.edu>.

       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)               21 Aug 1999              gl_setcontextvga(3)

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