+++ /dev/null
-package Font::TTF::Mort::Ligature;
-
-=head1 NAME
-
-Font::TTF::Mort::Ligature - Ligature Mort subtable for AAT
-
-=head1 METHODS
-
-=cut
-
-use strict;
-use vars qw(@ISA);
-use Font::TTF::Utils;
-use Font::TTF::AATutils;
-use IO::File;
-
-@ISA = qw(Font::TTF::Mort::Subtable);
-
-sub new
-{
- my ($class, $direction, $orientation, $subFeatureFlags) = @_;
- my ($self) = {
- 'direction' => $direction,
- 'orientation' => $orientation,
- 'subFeatureFlags' => $subFeatureFlags
- };
-
- $class = ref($class) || $class;
- bless $self, $class;
-}
-
-=head2 $t->read
-
-Reads the table into memory
-
-=cut
-
-sub read
-{
- my ($self, $fh) = @_;
- my ($dat);
-
- my $stateTableStart = $fh->tell();
- my ($classes, $states, $entries) = AAT_read_state_table($fh, 0);
-
- $fh->seek($stateTableStart, IO::File::SEEK_SET);
- $fh->read($dat, 14);
- my ($stateSize, $classTable, $stateArray, $entryTable,
- $ligActionTable, $componentTable, $ligatureTable) = unpack("nnnnnnn", $dat);
- my $limits = [$classTable, $stateArray, $entryTable, $ligActionTable, $componentTable, $ligatureTable, $self->{'length'} - 8];
-
- my %actions;
- my $actionLists;
- foreach (@$entries) {
- my $offset = $_->{'flags'} & 0x3fff;
- $_->{'flags'} &= ~0x3fff;
- if ($offset != 0) {
- if (not defined $actions{$offset}) {
- $fh->seek($stateTableStart + $offset, IO::File::SEEK_SET);
- my $actionList;
- while (1) {
- $fh->read($dat, 4);
- my $action = unpack("N", $dat);
- my ($last, $store, $component) = (($action & 0x80000000) != 0, ($action & 0xC0000000) != 0, ($action & 0x3fffffff));
- $component -= 0x40000000 if $component > 0x1fffffff;
- $component -= $componentTable / 2;
- push @$actionList, { 'store' => $store, 'component' => $component };
- last if $last;
- }
- push @$actionLists, $actionList;
- $actions{$offset} = $#$actionLists;
- }
- $_->{'actions'} = $actions{$offset};
- }
- }
-
- $self->{'componentTable'} = $componentTable;
- my $components = [unpack("n*", AAT_read_subtable($fh, $stateTableStart, $componentTable, $limits))];
- foreach (@$components) {
- $_ = ($_ - $ligatureTable) . " +" if $_ >= $ligatureTable;
- }
- $self->{'components'} = $components;
-
- $self->{'ligatureTable'} = $ligatureTable;
- $self->{'ligatures'} = [unpack("n*", AAT_read_subtable($fh, $stateTableStart, $ligatureTable, $limits))];
-
- $self->{'classes'} = $classes;
- $self->{'states'} = $states;
- $self->{'actionLists'} = $actionLists;
-
- $self;
-}
-
-=head2 $t->pack_sub($fh)
-
-=cut
-
-sub pack_sub
-{
- my ($self) = @_;
- my ($dat);
-
- $dat .= pack("nnnnnnn", (0) x 7); # placeholders for stateSize, classTable, stateArray, entryTable, actionLists, components, ligatures
-
- my $classTable = length($dat);
- my $classes = $self->{'classes'};
- $dat .= AAT_pack_classes($classes);
-
- my $stateArray = length($dat);
- my $states = $self->{'states'};
-
- my ($dat1, $stateSize, $entries) = AAT_pack_states($classes, $stateArray, $states,
- sub {
- ( $_->{'flags'} & 0xc000, $_->{'actions'} )
- }
- );
- $dat .= $dat1;
-
- my $actionLists = $self->{'actionLists'};
- my %actionListOffset;
- my $actionListDataLength = 0;
- my @actionListEntries;
- foreach (0 .. $#$entries) {
- my ($nextState, $flags, $offset) = split(/,/, $entries->[$_]);
- if ($offset eq "") {
- $offset = undef;
- }
- else {
- if (defined $actionListOffset{$offset}) {
- $offset = $actionListOffset{$offset};
- }
- else {
- $actionListOffset{$offset} = $actionListDataLength;
- my $list = $actionLists->[$offset];
- $actionListDataLength += 4 * @$list;
- push @actionListEntries, $list;
- $offset = $actionListOffset{$offset};
- }
- }
- $entries->[$_] = [ $nextState, $flags, $offset ];
- }
- my $entryTable = length($dat);
- my $ligActionLists = ($entryTable + @$entries * 4 + 3) & ~3;
- foreach (@$entries) {
- $_->[2] += $ligActionLists if defined $_->[2];
- $dat .= pack("nn", $_->[0], $_->[1] + $_->[2]);
- }
- $dat .= pack("C*", (0) x ($ligActionLists - $entryTable - @$entries * 4));
-
- die "internal error" unless length($dat) == $ligActionLists;
-
- my $componentTable = length($dat) + $actionListDataLength;
- my $actionList;
- foreach $actionList (@actionListEntries) {
- foreach (0 .. $#$actionList) {
- my $action = $actionList->[$_];
- my $val = $action->{'component'} + $componentTable / 2;
- $val += 0x40000000 if $val < 0;
- $val &= 0x3fffffff;
- $val |= 0x40000000 if $action->{'store'};
- $val |= 0x80000000 if $_ == $#$actionList;
- $dat .= pack("N", $val);
- }
- }
-
- die "internal error" unless length($dat) == $componentTable;
-
- my $components = $self->{'components'};
- my $ligatureTable = $componentTable + @$components * 2;
- $dat .= pack("n*", map { (index($_, '+') >= 0 ? $ligatureTable : 0) + $_ } @$components);
-
- my $ligatures = $self->{'ligatures'};
- $dat .= pack("n*", @$ligatures);
-
- $dat1 = pack("nnnnnnn", $stateSize, $classTable, $stateArray, $entryTable, $ligActionLists, $componentTable, $ligatureTable);
- substr($dat, 0, length($dat1)) = $dat1;
-
- return $dat;
-}
-
-=head2 $t->print($fh)
-
-Prints a human-readable representation of the table
-
-=cut
-
-sub print
-{
- my ($self, $fh) = @_;
-
- my $post = $self->post();
-
- $fh = 'STDOUT' unless defined $fh;
-
- $self->print_classes($fh);
-
- $fh->print("\n");
- my $states = $self->{'states'};
- foreach (0 .. $#$states) {
- $fh->printf("\t\tState %d:", $_);
- my $state = $states->[$_];
- foreach (@$state) {
- my $flags;
- $flags .= "!" if ($_->{'flags'} & 0x4000);
- $flags .= "*" if ($_->{'flags'} & 0x8000);
- $fh->printf("\t(%s%d,%s)", $flags, $_->{'nextState'}, defined $_->{'actions'} ? $_->{'actions'} : "=");
- }
- $fh->print("\n");
- }
-
- $fh->print("\n");
- my $actionLists = $self->{'actionLists'};
- foreach (0 .. $#$actionLists) {
- $fh->printf("\t\tList %d:\t", $_);
- my $actionList = $actionLists->[$_];
- $fh->printf("%s\n", join(", ", map { ($_->{'component'} . ($_->{'store'} ? "*" : "") ) } @$actionList));
- }
-
- my $ligatureTable = $self->{'ligatureTable'};
-
- $fh->print("\n");
- my $components = $self->{'components'};
- foreach (0 .. $#$components) {
- $fh->printf("\t\tComponent %d: %s\n", $_, $components->[$_]);
- }
-
- $fh->print("\n");
- my $ligatures = $self->{'ligatures'};
- foreach (0 .. $#$ligatures) {
- $fh->printf("\t\tLigature %d: %d [%s]\n", $_, $ligatures->[$_], $post->{'VAL'}[$ligatures->[$_]]);
- }
-}
-
-1;
-
-=head1 BUGS
-
-None known
-
-=head1 AUTHOR
-
-Jonathan Kew L<Jonathan_Kew@sil.org>. See L<Font::TTF::Font> for copyright and
-licensing.
-
-=cut
-
fnp / librarian.git / blobdiff