44 lines
1.3 KiB
Groff
44 lines
1.3 KiB
Groff
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.TH vga_oktowrite 3 "27 July 1997" "Svgalib (>= 1.2.11)" "Svgalib User Manual"
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.SH NAME
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vga_oktowrite \- indicates whether the program has direct access to the SVGA
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.SH SYNOPSIS
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.B "#include <vga.h>"
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.BI "int vga_oktowrite(void);"
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.SH DESCRIPTION
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Indicates whether the program is in the console currently
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visible on the screen, that is, whether it is OK to write
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to video memory (if running in the background has been allowed
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with the function above). Note that this is not entirely
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safe, since a console switch interrupt may occur during a
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video operation. It is best to avoid this function.
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Usually your program will be suspended when it has no access to the
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screen but see
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.BR vga_runinbackground (3)
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for an alternative.
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.SH SEE ALSO
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.BR svgalib (7),
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.BR vgagl (7),
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.BR libvga.config (5),
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.BR bg_test (6),
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.BR vga_runinbackground (3),
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.BR vga_runinbackground_version (3)
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.SH AUTHOR
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This manual page was edited by Michael Weller <eowmob@exp-math.uni-essen.de>. The
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exact source of the referenced function as well as of the original documentation is
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unknown.
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It is very likely that both are at least to some extent are due to
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Harm Hanemaayer <H.Hanemaayer@inter.nl.net>.
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Occasionally this might be wrong. I hereby
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asked to be excused by the original author and will happily accept any additions or corrections
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to this first version of the svgalib manual.
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