NAME¶
vga_getmodenumber - return a number for the given video mode
SYNOPSIS¶
#include <vga.h>
int vga_getmodenumber(char *name);
DESCRIPTION¶
The function parses
*name and tries to find a videomode corresponding on
it.
*name is parsed case insensitive and should be either an integer
string just giving a mode number or consist of a capital
G followed by
the
amount of x pixels, followed by a lower case
x, followed by
the
amount of y pixels, followed by a lower case
x. Finally the
number of different colors is appended. Here the shortcuts
32K,
64K,
16M, and
16M4 are used for 32768, 65536,
and 16777216 are used. The last refers also to 16777216 which are store in 4
bytes (highest address byte unused) for easier screen access.
For unsupported values or the string "PROMPT" the value -1 is
returned. Also a irritating error message is printed to stdout. This is used
during parsing the
SVGALIB_DEFAULT_MODE environment variable. Probably
it should not be used for anything else.
EXAMPLE¶
vga_getmodenumber("G640x480x256") returns
10.
SEE ALSO¶
svgalib(7),
vgagl(7),
libvga.config(5),
vgatest(6),
vga_hasmode(3),
vga_modeinfo(3),
vga_setmode(3),
vga_lastmodenumber(3),
vga_getcurrentmode(3),
vga_getdefaultmode(3),
vga_getmodename(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.
