--- /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