.TH GTF 1 "xorg-server 25.2.0" "X Version 11"
.SH NAME
gtf - calculate VESA GTF mode lines
.SH SYNOPSIS
.B gtf
.I h-resolution
.I v-resolution
.I refresh
.RB [ \-v | \-\-verbose ]
.RB [ \-f | \-\-fbmode ]
.RB [ \-x | \-\-xorgmode ]
.SH DESCRIPTION
.I Gtf
is a utility for calculating VESA GTF modes.  Given the desired
horizontal and vertical resolutions and refresh rate (in Hz), the parameters
for a matching VESA GTF mode are printed out.  Two output formats are
supported: mode lines suitable for the Xorg
.BR xorg.conf (5)
file, and mode parameters suitable for the Linux
.BR fbset (8)
utility.

.SH OPTIONS
.TP 8
.BR \-v | \-\-verbose
Enable verbose printouts  This shows a trace for each step of the
computation.
.TP 8
.BR \-x | \-\-xorgmode
Print the mode parameters as Xorg-style mode lines.  This is the
default format.
.TP 8
.BR \-f | \-\-fbset
Print the mode parameters in a format suitable for
.BR fbset (8).
.SH "SEE ALSO"
.BR xorg.conf (5),
.BR cvt (1)
.SH AUTHOR
Andy Ritger.
.PP
This program is based on the Generalized Timing Formula (GTF(TM)) Standard
Version: 1.0, Revision: 1.0.  The GTF Excel(TM) spreadsheet, a sample
(and the definitive) implementation of the GTF Timing Standard is
available at <ftp://ftp.vesa.org/pub/GTF/VTF_V1R1.xls>.