gl_setcontextvgavirtual - set the context to a virtual mode
int gl_setcontextvgavirtual(int mode);
Allocate a virtual screen in system memory identical to the graphics
mode (as defined in vga_setmode(3)), and make that the current graphics
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.
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).
This manual page was edited by Michael Weller <firstname.lastname@example.org-
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
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.