97 lines
1.7 KiB
Perl
97 lines
1.7 KiB
Perl
package Font::TTF::Vmtx;
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=head1 NAME
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Font::TTF::Vmtx - Vertical Metrics
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=head1 DESCRIPTION
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Contains the advance height and top side bearing for each glyph. Given the
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compressability of the data onto disk, this table uses information from
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other tables, and thus must do part of its output during the output of
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other tables
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=head1 INSTANCE VARIABLES
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The vertical metrics are kept in two arrays by glyph id. The variable names
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do not start with a space
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=over 4
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=item advance
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An array containing the advance height for each glyph
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=item top
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An array containing the top side bearing for each glyph
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=back
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=head1 METHODS
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=cut
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use strict;
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use vars qw(@ISA);
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require Font::TTF::Hmtx;
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@ISA = qw(Font::TTF::Hmtx);
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=head2 $t->read
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Reads the vertical metrics from the TTF file into memory
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=cut
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sub read
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{
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my ($self) = @_;
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my ($numh, $numg);
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$numh = $self->{' PARENT'}{'vhea'}->read->{'numberOfVMetrics'};
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$numg = $self->{' PARENT'}{'maxp'}{'numGlyphs'};
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$self->_read($numg, $numh, "advance", "top");
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}
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=head2 $t->out($fh)
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Writes the metrics to a TTF file. Assumes that the C<vhea> has updated the
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numVMetrics from here
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=cut
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sub out
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{
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my ($self, $fh) = @_;
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my ($numg) = $self->{' PARENT'}{'maxp'}{'numGlyphs'};
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my ($numh) = $self->{' PARENT'}{'vhea'}{'numberOfVMetrics'};
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$self->_out($fh, $numg, $numh, "advance", "top");
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}
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1;
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=head1 BUGS
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None known
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=head1 AUTHOR
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Martin Hosken L<http://scripts.sil.org/FontUtils>.
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=head1 LICENSING
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Copyright (c) 1998-2016, SIL International (http://www.sil.org)
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This module is released under the terms of the Artistic License 2.0.
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For details, see the full text of the license in the file LICENSE.
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=cut
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