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.\" ========================================================================
.\"
.IX Title "Font::TTF::Vmtx 3"
.TH Font::TTF::Vmtx 3 "2016-08-03" "perl v5.26.3" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
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.SH "NAME"
Font::TTF::Vmtx \- Vertical Metrics
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
Contains the advance height and top side bearing for each glyph. Given the
compressability of the data onto disk, this table uses information from
other tables, and thus must do part of its output during the output of
other tables
.SH "INSTANCE VARIABLES"
.IX Header "INSTANCE VARIABLES"
The vertical metrics are kept in two arrays by glyph id. The variable names
do not start with a space
.IP "advance" 4
.IX Item "advance"
An array containing the advance height for each glyph
.IP "top" 4
.IX Item "top"
An array containing the top side bearing for each glyph
.SH "METHODS"
.IX Header "METHODS"
.ie n .SS "$t\->read"
.el .SS "\f(CW$t\fP\->read"
.IX Subsection "$t->read"
Reads the vertical metrics from the \s-1TTF\s0 file into memory
.ie n .SS "$t\->out($fh)"
.el .SS "\f(CW$t\fP\->out($fh)"
.IX Subsection "$t->out($fh)"
Writes the metrics to a \s-1TTF\s0 file. Assumes that the \f(CW\*(C`vhea\*(C'\fR has updated the
numVMetrics from here
.SH "BUGS"
.IX Header "BUGS"
None known
.SH "AUTHOR"
.IX Header "AUTHOR"
Martin Hosken <http://scripts.sil.org/FontUtils>.
.SH "LICENSING"
.IX Header "LICENSING"
Copyright (c) 1998\-2016, \s-1SIL\s0 International (http://www.sil.org)
.PP
This module is released under the terms of the Artistic License 2.0. 
For details, see the full text of the license in the file \s-1LICENSE.\s0