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.