vga_oktowrite(3)						Svgalib User Manual						  vga_oktowrite(3)

NAME

       vga_oktowrite - indicates whether the program has direct access to the SVGA

SYNOPSIS

       #include <vga.h>

       int vga_oktowrite(void);

DESCRIPTION

       Indicates  whether  the	program  is in the console currently visible on the screen, that is, whether it is OK to write to video memory (if
       running in the background has been allowed with the function above). Note that this is not entirely safe, since a console switch  interrupt
       may occur during a video operation. It is best to avoid this function.

       Usually your program will be suspended when it has no access to the screen but see vga_runinbackground(3) for an alternative.

SEE ALSO

       svgalib(7), vgagl(7), libvga.config(5), bg_test(6), vga_runinbackground(3), vga_runinbackground_version(3)

AUTHOR

       This manual page was edited by Michael Weller <eowmob@exp-math.uni-essen.de>. The exact source of the referenced function 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)						   27 July 1997 						  vga_oktowrite(3)