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.IX Title "TTF2VOLT 1"
.TH TTF2VOLT 1 2026-10-03 "perl v5.44.0" "User Contributed Perl Documentation"
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.SH NAME
ttf2volt \- create VOLT project from existing OpenType font file
.SH SYNOPSIS
.IX Header "SYNOPSIS"
.Vb 1
\&  ttf2volt [options] infontfile [outfontfile]
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.PP
Creates a VOLT project from an existing OpenType font file.
.SH OPTIONS
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\&  \-a        allow non\-adobe glyph names
\&  \-g n      group creation threshold
\&  \-l file   emit log messages to named file
\&  \-r        retain GPOS, GSUB, and GDEF tables in output font
\&  \-s        do not send warnings to stdout (will still go to log)
\&  \-t file   name of replacement VOLT tags file if needed.
\&  \-v file   Volt project source (.vtp) file to create
.Ve
.SH DESCRIPTION
.IX Header "DESCRIPTION"
Attempts to create a VOLT project from an existing OpenType font by reading and
interpreting the existing GDEF, GPOS, and GSUB tables. Not every OpenType
rule can be mimiced in VOLT; warnings are issued when ttf2volt cannot
handle something.
.PP
In normal usage, specify either outfontfile (to create a font
ready to be opened by VOLT) and/or the \-v option (to create a
VOLT project source that can be imported into the font).
.PP
The group creation threshold option sets the minimum number of glyphs
that ttf2volt will put into a group for the purposes of building
a lookup.
.PP
Lookups currently supported  (type[.format]):
.PP
GSUB:   1 2 3 4   6.3
GPOS    1 2 3 4 5     8.3
.SH AUTHOR
.IX Header "AUTHOR"
Martin Hosken <http://scripts.sil.org/FontUtils>.
(see CONTRIBUTORS for other authors).
.SH LICENSING
.IX Header "LICENSING"
Copyright (c) 1998\-2016, SIL International (http://www.sil.org)
.PP
This script is released under the terms of the Artistic License 2.0.
For details, see the full text of the license in the file LICENSE..