48 lines
1.4 KiB
Groff
48 lines
1.4 KiB
Groff
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.TH vga_setdisplaystart 3 "27 July 1997" "Svgalib (>= 1.2.11)" "Svgalib User Manual"
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.SH NAME
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vga_setdisplaystart \- set the display start address
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.SH SYNOPSIS
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.B "#include <vga.h>"
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.BI "void vga_setdisplaystart(int " a );
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.SH DESCRIPTION
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Set the display start address to
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.IR a ,
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where the address is the
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number of pixels offset from the start of video memory,
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except for hicolor/truecolor modes, which use a unit of
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1 byte. Can be used for page-flipping and virtual desktop
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scrolling. May not work properly for 16 color modes.
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You should ensure that the memory displayed is actually available on the SVGA
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card (query memory size with
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.BR vga_modeinfo (3))
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and ensure that it is saved by svgalib during console switches with
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.BR vga_claimvideomemory (3).
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You may only set the bits of the display start address returned by
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.BR vga_modeinfo (3).
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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 vga_modeinfo (3),
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.BR vga_setlogicalwidth (3),
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.BR vga_claimvideomemory (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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