————#=======================================================================
# ____ ____ _____ _ ____ ___ ____
# | _ \| _ \| ___| _ _ / \ | _ \_ _| |___ \
# | |_) | | | | |_ (_) (_) / _ \ | |_) | | __) |
# | __/| |_| | _| _ _ / ___ \| __/| | / __/
# |_| |____/|_| (_) (_) /_/ \_\_| |___| |_____|
#
# A Perl Module Chain to faciliate the Creation and Modification
# of High-Quality "Portable Document Format (PDF)" Files.
#
#=======================================================================
#
# THIS IS A REUSED PERL MODULE, FOR PROPER LICENCING TERMS SEE BELOW:
#
#
# Copyright Martin Hosken <Martin_Hosken@sil.org>
#
# No warranty or expression of effectiveness, least of all regarding
# anyone's safety, is implied in this software or documentation.
#
# This specific module is licensed under the Perl Artistic License.
#
#
# $Id: Vmtx.pm,v 1.5 2004/06/15 09:14:41 fredo Exp $
#
#=======================================================================
package
PDF::API2::Basic::TTF::Vmtx;
=head1 NAME
PDF::API2::Basic::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;
require
PDF::API2::Basic::TTF::Hmtx;
@ISA
=
qw(PDF::API2::Basic::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'
}->
read
->{
'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 Martin_Hosken@sil.org. See L<PDF::API2::Basic::TTF::Font> for copyright and
licensing.
=cut