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package Font::TTF::Mort::Subtable;
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=head1 NAME
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Font::TTF::Mort::Subtable - Mort subtable superclass for AAT
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=head1 METHODS
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=cut
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use strict;
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use Font::TTF::Utils;
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use Font::TTF::AATutils;
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use IO::File;
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require Font::TTF::Mort::Rearrangement;
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require Font::TTF::Mort::Contextual;
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require Font::TTF::Mort::Ligature;
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require Font::TTF::Mort::Noncontextual;
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require Font::TTF::Mort::Insertion;
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sub new
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{
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my ($class) = @_;
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my ($self) = {};
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$class = ref($class) || $class;
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bless $self, $class;
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}
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sub create
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{
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my ($class, $type, $coverage, $subFeatureFlags, $length) = @_;
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$class = ref($class) || $class;
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my $subclass;
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if ($type == 0) {
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$subclass = 'Font::TTF::Mort::Rearrangement';
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}
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elsif ($type == 1) {
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$subclass = 'Font::TTF::Mort::Contextual';
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}
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elsif ($type == 2) {
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$subclass = 'Font::TTF::Mort::Ligature';
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}
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elsif ($type == 4) {
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$subclass = 'Font::TTF::Mort::Noncontextual';
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}
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elsif ($type == 5) {
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$subclass = 'Font::TTF::Mort::Insertion';
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}
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my ($self) = $subclass->new(
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(($coverage & 0x4000) ? 'RL' : 'LR'),
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(($coverage & 0x2000) ? 'VH' : ($coverage & 0x8000) ? 'V' : 'H'),
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$subFeatureFlags
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);
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$self->{'type'} = $type;
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$self->{'length'} = $length;
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$self;
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}
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=head2 $t->out($fh)
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Writes the table to a file
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=cut
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sub out
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{
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my ($self, $fh) = @_;
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my ($subtableStart) = $fh->tell();
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my ($type) = $self->{'type'};
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my ($coverage) = $type;
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$coverage += 0x4000 if $self->{'direction'} eq 'RL';
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$coverage += 0x2000 if $self->{'orientation'} eq 'VH';
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$coverage += 0x8000 if $self->{'orientation'} eq 'V';
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$fh->print(TTF_Pack("SSL", 0, $coverage, $self->{'subFeatureFlags'})); # placeholder for length
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my ($dat) = $self->pack_sub();
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$fh->print($dat);
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my ($length) = $fh->tell() - $subtableStart;
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my ($padBytes) = (4 - ($length & 3)) & 3;
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$fh->print(pack("C*", (0) x $padBytes));
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$length += $padBytes;
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$fh->seek($subtableStart, IO::File::SEEK_SET);
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$fh->print(pack("n", $length));
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$fh->seek($subtableStart + $length, IO::File::SEEK_SET);
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}
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=head2 $t->print($fh)
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Prints a human-readable representation of the table
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=cut
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sub post
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{
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my ($self) = @_;
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my ($post) = $self->{' PARENT'}{' PARENT'}{' PARENT'}{'post'};
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if (defined $post) {
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$post->read;
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}
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else {
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$post = {};
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}
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return $post;
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}
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sub feat
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{
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my ($self) = @_;
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return $self->{' PARENT'}->feat();
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}
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sub print
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{
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my ($self, $fh) = @_;
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my ($feat) = $self->feat();
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my ($post) = $self->post();
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$fh = 'STDOUT' unless defined $fh;
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my ($type) = $self->{'type'};
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my ($subFeatureFlags) = $self->{'subFeatureFlags'};
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my ($defaultFlags) = $self->{' PARENT'}{'defaultFlags'};
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my ($featureEntries) = $self->{' PARENT'}{'featureEntries'};
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$fh->printf("\n\t%s table, %s, %s, subFeatureFlags = %08x # %s (%s)\n",
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subtable_type_($type), $_->{'direction'}, $_->{'orientation'}, $subFeatureFlags,
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"Default " . ((($subFeatureFlags & $defaultFlags) != 0) ? "On" : "Off"),
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join(", ",
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map {
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join(": ", $feat->settingName($_->{'type'}, $_->{'setting'}) )
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} grep { ($_->{'enable'} & $subFeatureFlags) != 0 } @$featureEntries
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) );
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}
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sub subtable_type_
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{
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my ($val) = @_;
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my ($res);
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my (@types) = (
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'Rearrangement',
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'Contextual',
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'Ligature',
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undef,
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'Non-contextual',
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'Insertion',
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);
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$res = $types[$val] or ('Undefined (' . $val . ')');
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$res;
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}
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=head2 $t->print_classes($fh)
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Prints a human-readable representation of the table
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=cut
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sub print_classes
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{
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my ($self, $fh) = @_;
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my ($post) = $self->post();
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my ($classes) = $self->{'classes'};
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foreach (0 .. $#$classes) {
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my $class = $classes->[$_];
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if (defined $class) {
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$fh->printf("\t\tClass %d:\t%s\n", $_, join(", ", map { $_ . " [" . $post->{'VAL'}[$_] . "]" } @$class));
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}
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}
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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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Jonathan Kew 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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