+++ /dev/null
-package Font::TTF::OldMort;
-
-=head1 NAME
-
-Font::TTF::OldMort - Glyph Metamorphosis table in a font
-
-=head1 DESCRIPTION
-
-=head1 INSTANCE VARIABLES
-
-=item version
-
-table version number (Fixed: currently 1.0)
-
-=item chains
-
-list of metamorphosis chains, each of which has its own fields:
-
-=over
-
-=item defaultFlags
-
-chain's default subfeature flags (UInt32)
-
-=item featureEntries
-
-list of feature entries, each of which has fields:
-
-=over
-
-=item type
-
-=item setting
-
-=item enable
-
-=item disable
-
-=back
-
-=item subtables
-
-list of metamorphosis subtables, each of which has fields:
-
-=over
-
-=item type
-
-subtable type (0: rearrangement; 1: contextual substitution; 2: ligature;
-4: non-contextual substitution; 5: insertion)
-
-=item direction
-
-processing direction ('LR' or 'RL')
-
-=item orientation
-
-applies to text in which orientation ('VH', 'V', or 'H')
-
-=item subFeatureFlags
-
-the subfeature flags controlling whether the table is used (UInt32)
-
-=back
-
-Further fields depend on the type of subtable:
-
-=over
-
-Rearrangement table:
-
-=over
-
-=item classes
-
-array of lists of glyphs
-
-=item states
-
-array of arrays of hashes{'nextState', 'flags'}
-
-=back
-
-Contextual substitution table:
-
-=over
-
-=item classes
-
-array of lists of glyphs
-
-=item states
-
-array of array of hashes{'nextState', 'flags', 'actions'}, where C<actions>
-is an array of two elements which are offsets to be added to [marked, current]
-glyph to get index into C<mappings> (or C<undef> if no mapping to be applied)
-
-=item mappings
-
-list of glyph codes mapped to through the state table mappings
-
-=back
-
-Ligature table:
-
-Non-contextual substitution table:
-
-Insertion table:
-
-=back
-
-=back
-
-=head1 METHODS
-
-=cut
-
-use strict;
-use vars qw(@ISA);
-use Font::TTF::Utils;
-use Font::TTF::AATutils;
-use IO::File;
-
-@ISA = qw(Font::TTF::Table);
-
-=head2 $t->read
-
-Reads the table into memory
-
-=cut
-
-sub read
-{
- my ($self) = @_;
- my ($dat, $fh, $numChains);
-
- $self->SUPER::read or return $self;
-
- $fh = $self->{' INFILE'};
-
- $fh->read($dat, 8);
- ($self->{'version'}, $numChains) = TTF_Unpack("fL", $dat);
-
- my $chains = [];
- foreach (1 .. $numChains) {
- my $chainStart = $fh->tell();
- $fh->read($dat, 12);
- my ($defaultFlags, $chainLength, $nFeatureEntries, $nSubtables) = TTF_Unpack("LLSS", $dat);
- my $featureEntries = [];
- foreach (1 .. $nFeatureEntries) {
- $fh->read($dat, 12);
- my ($featureType, $featureSetting, $enableFlags, $disableFlags) = TTF_Unpack("SSLL", $dat);
- push @$featureEntries, {
- 'type' => $featureType,
- 'setting' => $featureSetting,
- 'enable' => $enableFlags,
- 'disable' => $disableFlags
- };
- }
- my $subtables = [];
- foreach (1 .. $nSubtables) {
- my $subtableStart = $fh->tell();
- $fh->read($dat, 8);
- my ($length, $coverage, $subFeatureFlags) = TTF_Unpack("SSL", $dat);
- my $type = $coverage & 0x0007;
-
- my $subtable = {
- 'type' => $type,
- 'direction' => (($coverage & 0x4000) ? 'RL' : 'LR'),
- 'orientation' => (($coverage & 0x2000) ? 'VH' : ($coverage & 0x8000) ? 'V' : 'H'),
- 'subFeatureFlags' => $subFeatureFlags
- };
-
- if ($type == 0) { # rearrangement
- my ($classes, $states) = AAT_read_state_table($fh, 0);
- $subtable->{'classes'} = $classes;
- $subtable->{'states'} = $states;
- }
-
- elsif ($type == 1) { # contextual
- my $stateTableStart = $fh->tell();
- my ($classes, $states, $entries) = AAT_read_state_table($fh, 2);
-
- $fh->seek($stateTableStart, IO::File::SEEK_SET);
- $fh->read($dat, 10);
- my ($stateSize, $classTable, $stateArray, $entryTable, $mappingTables) = unpack("nnnnn", $dat);
- my $limits = [$classTable, $stateArray, $entryTable, $mappingTables, $length - 8];
-
- foreach (@$entries) {
- my $actions = $_->{'actions'};
- foreach (@$actions) {
- $_ = $_ ? $_ - ($mappingTables / 2) : undef;
- }
- }
-
- $subtable->{'classes'} = $classes;
- $subtable->{'states'} = $states;
- $subtable->{'mappings'} = [unpack("n*", AAT_read_subtable($fh, $stateTableStart, $mappingTables, $limits))];
- }
-
- elsif ($type == 2) { # ligature
- 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, $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};
- }
- }
-
- $subtable->{'componentTable'} = $componentTable;
- my $components = [unpack("n*", AAT_read_subtable($fh, $stateTableStart, $componentTable, $limits))];
- foreach (@$components) {
- $_ = ($_ - $ligatureTable) . " +" if $_ >= $ligatureTable;
- }
- $subtable->{'components'} = $components;
-
- $subtable->{'ligatureTable'} = $ligatureTable;
- $subtable->{'ligatures'} = [unpack("n*", AAT_read_subtable($fh, $stateTableStart, $ligatureTable, $limits))];
-
- $subtable->{'classes'} = $classes;
- $subtable->{'states'} = $states;
- $subtable->{'actionLists'} = $actionLists;
- }
-
- elsif ($type == 4) { # non-contextual
- my ($format, $lookup) = AAT_read_lookup($fh, 2, $length - 8, undef);
- $subtable->{'format'} = $format;
- $subtable->{'lookup'} = $lookup;
- }
-
- elsif ($type == 5) { # insertion
- my $stateTableStart = $fh->tell();
- my ($classes, $states, $entries) = AAT_read_state_table($fh, 2);
-
- my %insertListHash;
- my $insertLists;
- foreach (@$entries) {
- my $flags = $_->{'flags'};
- my @insertCount = (($flags & 0x03e0) >> 5, ($flags & 0x001f));
- my $actions = $_->{'actions'};
- foreach (0 .. 1) {
- if ($insertCount[$_] > 0) {
- $fh->seek($stateTableStart + $actions->[$_], IO::File::SEEK_SET);
- $fh->read($dat, $insertCount[$_] * 2);
- if (not defined $insertListHash{$dat}) {
- push @$insertLists, [unpack("n*", $dat)];
- $insertListHash{$dat} = $#$insertLists;
- }
- $actions->[$_] = $insertListHash{$dat};
- }
- else {
- $actions->[$_] = undef;
- }
- }
- }
-
- $subtable->{'classes'} = $classes;
- $subtable->{'states'} = $states;
- $subtable->{'insertLists'} = $insertLists;
- }
-
- else {
- die "unknown subtable type";
- }
-
- push @$subtables, $subtable;
- $fh->seek($subtableStart + $length, IO::File::SEEK_SET);
- }
-
- push @$chains, {
- 'defaultFlags' => $defaultFlags,
- 'featureEntries' => $featureEntries,
- 'subtables' => $subtables
- };
- $fh->seek($chainStart + $chainLength, IO::File::SEEK_SET);
- }
-
- $self->{'chains'} = $chains;
-
- $self;
-}
-
-=head2 $t->out($fh)
-
-Writes the table to a file either from memory or by copying
-
-=cut
-
-sub out
-{
- my ($self, $fh) = @_;
-
- return $self->SUPER::out($fh) unless $self->{' read'};
-
- my $chains = $self->{'chains'};
- $fh->print(TTF_Pack("fL", $self->{'version'}, scalar @$chains));
-
- foreach (@$chains) {
- my $chainStart = $fh->tell();
- my ($featureEntries, $subtables) = ($_->{'featureEntries'}, $_->{'subtables'});
- $fh->print(TTF_Pack("LLSS", $_->{'defaultFlags'}, 0, scalar @$featureEntries, scalar @$subtables)); # placeholder for length
-
- foreach (@$featureEntries) {
- $fh->print(TTF_Pack("SSLL", $_->{'type'}, $_->{'setting'}, $_->{'enable'}, $_->{'disable'}));
- }
-
- foreach (@$subtables) {
- my $subtableStart = $fh->tell();
- my $type = $_->{'type'};
- my $coverage = $type;
- $coverage += 0x4000 if $_->{'direction'} eq 'RL';
- $coverage += 0x2000 if $_->{'orientation'} eq 'VH';
- $coverage += 0x8000 if $_->{'orientation'} eq 'V';
-
- $fh->print(TTF_Pack("SSL", 0, $coverage, $_->{'subFeatureFlags'})); # placeholder for length
-
- if ($type == 0) { # rearrangement
- AAT_write_state_table($fh, $_->{'classes'}, $_->{'states'}, 0);
- }
-
- elsif ($type == 1) { # contextual
- my $stHeader = $fh->tell();
- $fh->print(pack("nnnnn", (0) x 5)); # placeholders for stateSize, classTable, stateArray, entryTable, mappingTables
-
- my $classTable = $fh->tell() - $stHeader;
- my $classes = $_->{'classes'};
- AAT_write_classes($fh, $classes);
-
- my $stateArray = $fh->tell() - $stHeader;
- my $states = $_->{'states'};
- my ($stateSize, $entries) = AAT_write_states($fh, $classes, $stateArray, $states,
- sub {
- my $actions = $_->{'actions'};
- ( $_->{'flags'}, @$actions )
- }
- );
-
- my $entryTable = $fh->tell() - $stHeader;
- my $offset = ($entryTable + 8 * @$entries) / 2;
- foreach (@$entries) {
- my ($nextState, $flags, @parts) = split /,/;
- $fh->print(pack("nnnn", $nextState, $flags, map { $_ eq "" ? 0 : $_ + $offset } @parts));
- }
-
- my $mappingTables = $fh->tell() - $stHeader;
- my $mappings = $_->{'mappings'};
- $fh->print(pack("n*", @$mappings));
-
- my $loc = $fh->tell();
- $fh->seek($stHeader, IO::File::SEEK_SET);
- $fh->print(pack("nnnnn", $stateSize, $classTable, $stateArray, $entryTable, $mappingTables));
- $fh->seek($loc, IO::File::SEEK_SET);
- }
-
- elsif ($type == 2) { # ligature
- my $stHeader = $fh->tell();
- $fh->print(pack("nnnnnnn", (0) x 7)); # placeholders for stateSize, classTable, stateArray, entryTable, actionLists, components, ligatures
-
- my $classTable = $fh->tell() - $stHeader;
- my $classes = $_->{'classes'};
- AAT_write_classes($fh, $classes);
-
- my $stateArray = $fh->tell() - $stHeader;
- my $states = $_->{'states'};
-
- my ($stateSize, $entries) = AAT_write_states($fh, $classes, $stateArray, $states,
- sub {
- ( $_->{'flags'} & 0xc000, $_->{'actions'} )
- }
- );
-
- my $actionLists = $_->{'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 = $fh->tell() - $stHeader;
- my $ligActionLists = ($entryTable + @$entries * 4 + 3) & ~3;
- foreach (@$entries) {
- $_->[2] += $ligActionLists if defined $_->[2];
- $fh->print(pack("nn", $_->[0], $_->[1] + $_->[2]));
- }
- $fh->print(pack("C*", (0) x ($ligActionLists - $entryTable - @$entries * 4)));
-
- die "internal error" if $fh->tell() != $ligActionLists + $stHeader;
-
- my $componentTable = $fh->tell() - $stHeader + $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;
- $fh->print(pack("N", $val));
- }
- }
-
- die "internal error" if $fh->tell() != $componentTable + $stHeader;
-
- my $components = $_->{'components'};
- my $ligatureTable = $componentTable + @$components * 2;
- $fh->print(pack("n*", map { (index($_, '+') >= 0 ? $ligatureTable : 0) + $_ } @$components));
-
- my $ligatures = $_->{'ligatures'};
- $fh->print(pack("n*", @$ligatures));
-
- my $loc = $fh->tell();
- $fh->seek($stHeader, IO::File::SEEK_SET);
- $fh->print(pack("nnnnnnn", $stateSize, $classTable, $stateArray, $entryTable, $ligActionLists, $componentTable, $ligatureTable));
- $fh->seek($loc, IO::File::SEEK_SET);
- }
-
- elsif ($type == 4) { # non-contextual
- AAT_write_lookup($fh, $_->{'format'}, $_->{'lookup'}, 2, undef);
- }
-
- elsif ($type == 5) { # insertion
- }
-
- else {
- die "unknown subtable type";
- }
-
- my $length = $fh->tell() - $subtableStart;
- my $padBytes = (4 - ($length & 3)) & 3;
- $fh->print(pack("C*", (0) x $padBytes));
- $length += $padBytes;
- $fh->seek($subtableStart, IO::File::SEEK_SET);
- $fh->print(pack("n", $length));
- $fh->seek($subtableStart + $length, IO::File::SEEK_SET);
- }
-
- my $chainLength = $fh->tell() - $chainStart;
- $fh->seek($chainStart + 4, IO::File::SEEK_SET);
- $fh->print(pack("N", $chainLength));
- $fh->seek($chainStart + $chainLength, IO::File::SEEK_SET);
- }
-}
-
-=head2 $t->print($fh)
-
-Prints a human-readable representation of the table
-
-=cut
-
-sub print
-{
- my ($self, $fh) = @_;
-
- $self->read;
- my $feat = $self->{' PARENT'}->{'feat'};
- $feat->read;
- my $post = $self->{' PARENT'}->{'post'};
- $post->read;
-
- $fh = 'STDOUT' unless defined $fh;
-
- $fh->printf("version %f\n", $self->{'version'});
-
- my $chains = $self->{'chains'};
- foreach (@$chains) {
- my $defaultFlags = $_->{'defaultFlags'};
- $fh->printf("chain: defaultFlags = %08x\n", $defaultFlags);
-
- my $featureEntries = $_->{'featureEntries'};
- foreach (@$featureEntries) {
- $fh->printf("\tfeature %d, setting %d : enableFlags = %08x, disableFlags = %08x # '%s: %s'\n",
- $_->{'type'}, $_->{'setting'}, $_->{'enable'}, $_->{'disable'},
- $feat->settingName($_->{'type'}, $_->{'setting'}));
- }
-
- my $subtables = $_->{'subtables'};
- foreach (@$subtables) {
- my $type = $_->{'type'};
- my $subFeatureFlags = $_->{'subFeatureFlags'};
- $fh->printf("\n\t%s table, %s, %s, subFeatureFlags = %08x # %s (%s)\n",
- subtable_type_($type), $_->{'direction'}, $_->{'orientation'}, $subFeatureFlags,
- "Default " . ((($subFeatureFlags & $defaultFlags) != 0) ? "On" : "Off"),
- join(", ",
- map {
- join(": ", $feat->settingName($_->{'type'}, $_->{'setting'}) )
- } grep { ($_->{'enable'} & $subFeatureFlags) != 0 } @$featureEntries
- ) );
-
- if ($type == 0) { # rearrangement
- print_classes_($fh, $_, $post);
-
- $fh->print("\n");
- my $states = $_->{'states'};
- my @verbs = ( "0", "Ax->xA", "xD->Dx", "AxD->DxA",
- "ABx->xAB", "ABx->xBA", "xCD->CDx", "xCD->DCx",
- "AxCD->CDxA", "AxCD->DCxA", "ABxD->DxAB", "ABxD->DxBA",
- "ABxCD->CDxAB", "ABxCD->CDxBA", "ABxCD->DCxAB", "ABxCD->DCxBA");
- foreach (0 .. $#$states) {
- $fh->printf("\t\tState %d:", $_);
- my $state = $states->[$_];
- foreach (@$state) {
- my $flags;
- $flags .= "!" if ($_->{'flags'} & 0x4000);
- $flags .= "<" if ($_->{'flags'} & 0x8000);
- $flags .= ">" if ($_->{'flags'} & 0x2000);
- $fh->printf("\t(%s%d,%s)", $flags, $_->{'nextState'}, $verbs[($_->{'flags'} & 0x000f)]);
- }
- $fh->print("\n");
- }
- }
-
- elsif ($type == 1) { # contextual
- print_classes_($fh, $_, $post);
-
- $fh->print("\n");
- my $states = $_->{'states'};
- foreach (0 .. $#$states) {
- $fh->printf("\t\tState %d:", $_);
- my $state = $states->[$_];
- foreach (@$state) {
- my $flags;
- $flags .= "!" if ($_->{'flags'} & 0x4000);
- $flags .= "*" if ($_->{'flags'} & 0x8000);
- my $actions = $_->{'actions'};
- $fh->printf("\t(%s%d,%s,%s)", $flags, $_->{'nextState'}, map { defined $_ ? $_ : "=" } @$actions);
- }
- $fh->print("\n");
- }
-
- $fh->print("\n");
- my $mappings = $_->{'mappings'};
- foreach (0 .. $#$mappings) {
- $fh->printf("\t\tMapping %d: %d [%s]\n", $_, $mappings->[$_], $post->{'VAL'}[$mappings->[$_]]);
- }
- }
-
- elsif ($type == 2) { # ligature
- print_classes_($fh, $_, $post);
-
- $fh->print("\n");
- my $states = $_->{'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 = $_->{'actionLists'};
- foreach (0 .. $#$actionLists) {
- $fh->printf("\t\tList %d:\t", $_);
- my $actionList = $actionLists->[$_];
- $fh->printf("%s\n", join(", ", map { ($_->{'component'} . ($_->{'store'} ? "*" : "") ) } @$actionList));
- }
-
- my $ligatureTable = $_->{'ligatureTable'};
-
- $fh->print("\n");
- my $components = $_->{'components'};
- foreach (0 .. $#$components) {
- $fh->printf("\t\tComponent %d: %s\n", $_, $components->[$_]);
- }
-
- $fh->print("\n");
- my $ligatures = $_->{'ligatures'};
- foreach (0 .. $#$ligatures) {
- $fh->printf("\t\tLigature %d: %d [%s]\n", $_, $ligatures->[$_], $post->{'VAL'}[$ligatures->[$_]]);
- }
- }
-
- elsif ($type == 4) { # non-contextual
- my $lookup = $_->{'lookup'};
- $fh->printf("\t\tLookup format %d\n", $_->{'format'});
- if (defined $lookup) {
- foreach (sort { $a <=> $b } keys %$lookup) {
- $fh->printf("\t\t\t%d [%s] -> %d [%s])\n", $_, $post->{'VAL'}[$_], $lookup->{$_}, $post->{'VAL'}[$lookup->{$_}]);
- }
- }
- }
-
- elsif ($type == 5) { # insertion
- print_classes_($fh, $_, $post);
-
- $fh->print("\n");
- my $states = $_->{'states'};
- foreach (0 .. $#$states) {
- $fh->printf("\t\tState %d:", $_);
- my $state = $states->[$_];
- foreach (@$state) {
- my $flags;
- $flags .= "!" if ($_->{'flags'} & 0x4000);
- $flags .= "*" if ($_->{'flags'} & 0x8000);
- my $actions = $_->{'actions'};
- $fh->printf("\t(%s%d,%s,%s)", $flags, $_->{'nextState'}, map { defined $_ ? $_ : "=" } @$actions);
- }
- $fh->print("\n");
- }
-
- $fh->print("\n");
- my $insertLists = $_->{'insertLists'};
- foreach (0 .. $#$insertLists) {
- my $insertList = $insertLists->[$_];
- $fh->printf("\t\tList %d: %s\n", $_, join(", ", map { $_ . " [" . $post->{'VAL'}[$_] . "]" } @$insertList));
- }
- }
-
- else {
- # unknown
- }
- }
- }
-}
-
-sub print_classes_
-{
- my ($fh, $subtable, $post) = @_;
-
- my $classes = $subtable->{'classes'};
- foreach (0 .. $#$classes) {
- my $class = $classes->[$_];
- if (defined $class) {
- $fh->printf("\t\tClass %d:\t%s\n", $_, join(", ", map { $_ . " [" . $post->{'VAL'}[$_] . "]" } @$class));
- }
- }
-}
-
-sub subtable_type_
-{
- my ($val) = @_;
- my ($res);
-
- my @types = (
- 'Rearrangement',
- 'Contextual',
- 'Ligature',
- undef,
- 'Non-contextual',
- 'Insertion',
- );
- $res = $types[$val] or ('Undefined (' . $val . ')');
-
- $res;
-}
-
-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