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/usr/share/perl5/Font/TTF/Vmtx.pm is in libfont-ttf-perl 1.06-1.

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package Font::TTF::Vmtx;

=head1 NAME

Font::TTF::Vmtx - Vertical Metrics

=head1 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

=head1 INSTANCE VARIABLES

The vertical metrics are kept in two arrays by glyph id. The variable names
do not start with a space

=over 4

=item advance

An array containing the advance height for each glyph

=item top

An array containing the top side bearing for each glyph

=back

=head1 METHODS

=cut

use strict;
use vars qw(@ISA);
require Font::TTF::Hmtx;

@ISA = qw(Font::TTF::Hmtx);


=head2 $t->read

Reads the vertical metrics from the TTF file into memory

=cut

sub read
{
    my ($self) = @_;
    my ($numh, $numg);

    $numh = $self->{' PARENT'}{'vhea'}->read->{'numberOfVMetrics'};
    $numg = $self->{' PARENT'}{'maxp'}{'numGlyphs'};
    $self->_read($numg, $numh, "advance", "top");
}


=head2 $t->out($fh)

Writes the metrics to a TTF file. Assumes that the C<vhea> has updated the
numVMetrics from here

=cut

sub out
{
    my ($self, $fh) = @_;
    my ($numg) = $self->{' PARENT'}{'maxp'}{'numGlyphs'};
    my ($numh) = $self->{' PARENT'}{'vhea'}{'numberOfVMetrics'};
    $self->_out($fh, $numg, $numh, "advance", "top");
}

1;

=head1 BUGS

None known

=head1 AUTHOR

Martin Hosken L<http://scripts.sil.org/FontUtils>. 


=head1 LICENSING

Copyright (c) 1998-2016, SIL International (http://www.sil.org) 

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 LICENSE.



=cut