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package Font::TTF::Mort::Insertion;
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=head1 NAME
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Font::TTF::Mort::Insertion - Insertion Mort subtable for AAT
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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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use Font::TTF::Utils;
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use Font::TTF::AATutils;
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use IO::File;
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@ISA = qw(Font::TTF::Mort::Subtable);
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sub new
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{
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my ($class, $direction, $orientation, $subFeatureFlags) = @_;
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my ($self) = {
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'direction' => $direction,
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'orientation' => $orientation,
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'subFeatureFlags' => $subFeatureFlags
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};
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$class = ref($class) || $class;
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bless $self, $class;
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}
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=head2 $t->read
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Reads the table into memory
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=cut
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sub read
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{
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my ($self, $fh) = @_;
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my ($dat);
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my $subtableStart = $fh->tell();
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my $stateTableStart = $fh->tell();
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my ($classes, $states, $entries) = AAT_read_state_table($fh, 2);
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my %insertListHash;
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my $insertLists;
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foreach (@$entries) {
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my $flags = $_->{'flags'};
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my @insertCount = (($flags & 0x03e0) >> 5, ($flags & 0x001f));
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my $actions = $_->{'actions'};
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foreach (0 .. 1) {
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if ($insertCount[$_] > 0) {
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$fh->seek($stateTableStart + $actions->[$_], IO::File::SEEK_SET);
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$fh->read($dat, $insertCount[$_] * 2);
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if (not defined $insertListHash{$dat}) {
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push @$insertLists, [unpack("n*", $dat)];
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$insertListHash{$dat} = $#$insertLists;
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}
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$actions->[$_] = $insertListHash{$dat};
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}
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else {
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$actions->[$_] = undef;
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}
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}
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}
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$self->{'classes'} = $classes;
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$self->{'states'} = $states;
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$self->{'insertLists'} = $insertLists;
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$self;
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}
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=head2 $t->pack_sub()
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=cut
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sub pack_sub
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{
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my ($self) = @_;
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my ($dat) = pack("nnnn", (0) x 4);
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my $classTable = length($dat);
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my $classes = $self->{'classes'};
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$dat .= AAT_pack_classes($classes);
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my $stateArray = length($dat);
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my $states = $self->{'states'};
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my ($dat1, $stateSize, $entries) = AAT_pack_states($classes, $stateArray, $states,
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sub {
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my $actions = $_->{'actions'};
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( $_->{'flags'}, @$actions )
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}
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);
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$dat .= $dat1;
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my $entryTable = length($dat);
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my $offset = ($entryTable + 8 * @$entries);
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my @insListOffsets;
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my $insertLists = $self->{'insertLists'};
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foreach (@$insertLists) {
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push @insListOffsets, $offset;
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$offset += 2 * scalar @$_;
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}
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foreach (@$entries) {
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my ($nextState, $flags, @lists) = split /,/;
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$flags &= ~0x03ff;
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$flags |= (scalar @{$insertLists->[$lists[0]]}) << 5 if $lists[0] ne '';
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$flags |= (scalar @{$insertLists->[$lists[1]]}) if $lists[1] ne '';
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$dat .= pack("nnnn", $nextState, $flags,
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map { $_ eq '' ? 0 : $insListOffsets[$_] } @lists);
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}
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foreach (@$insertLists) {
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$dat .= pack("n*", @$_);
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}
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$dat1 = pack("nnnn", $stateSize, $classTable, $stateArray, $entryTable);
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substr($dat, 0, length($dat1)) = $dat1;
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return $dat;
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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 print
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{
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my ($self, $fh) = @_;
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my $post = $self->post();
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$fh = 'STDOUT' unless defined $fh;
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$self->print_classes($fh);
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$fh->print("\n");
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my $states = $self->{'states'};
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foreach (0 .. $#$states) {
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$fh->printf("\t\tState %d:", $_);
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my $state = $states->[$_];
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foreach (@$state) {
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my $flags;
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$flags .= "!" if ($_->{'flags'} & 0x4000);
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$flags .= "*" if ($_->{'flags'} & 0x8000);
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my $actions = $_->{'actions'};
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$fh->printf("\t(%s%d,%s,%s)", $flags, $_->{'nextState'}, map { defined $_ ? $_ : "=" } @$actions);
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}
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$fh->print("\n");
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}
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$fh->print("\n");
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my $insertLists = $self->{'insertLists'};
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foreach (0 .. $#$insertLists) {
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my $insertList = $insertLists->[$_];
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$fh->printf("\t\tList %d: %s\n", $_, join(", ", map { $_ . " [" . $post->{'VAL'}[$_] . "]" } @$insertList));
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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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