1gl_setcontextvgavirtual(3)    Svgalib User Manual   gl_setcontextvgavirtual(3)
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NAME

6       gl_setcontextvgavirtual - set the context to a virtual mode
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SYNOPSIS

10       #include <vgagl.h>
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12       int gl_setcontextvgavirtual(int mode);
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DESCRIPTION

16       Allocate  a  virtual  screen in system memory identical to the graphics
17       mode (as defined in vga_setmode(3)), and make that the current graphics
18       context.
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20       The function returns 0 for success and non-zero if the mode is not sup‐
21       ported by the hardware.
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23       The only thing you can do with a planar (mode X-like) 256 color mode is
24       aligned gl_putbox, and use it as a target for gl_copyscreen.
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SEE ALSO

28       svgalib(7),  vgagl(7),  svgalib.conf(5),  threedkit(7), testgl(1), cur‐
29       rentcontext(3),    gl_allocatecontext(3),     gl_copyboxfromcontext(3),
30       gl_copyboxtocontext(3), gl_copyscreen(3), gl_freecontext(3), gl_getcon‐
31       text(3), gl_setcontext(3), gl_setcontextheight(3), gl_setcontextvga(3),
32       gl_setcontextvirtual(3), gl_setcontextwidth(3).
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AUTHOR

36       This  manual  page  was  edited by Michael Weller <eowmob@exp-math.uni-
37       essen.de>. The exact source of the referenced demo as well  as  of  the
38       original documentation is unknown.
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40       It is very likely that both are at least to some extent are due to Harm
41       Hanemaayer <H.Hanemaayer@inter.nl.net>.
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43       Occasionally this might be wrong. I hereby asked to be excused  by  the
44       original author and will happily accept any additions or corrections to
45       this first version of the svgalib manual.
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49Svgalib (>= 1.2.11)               2 Aug 1997        gl_setcontextvgavirtual(3)