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package Font::TTF::Mort::Subtable;
=head1 NAME
Font::TTF::Mort::Subtable - Mort subtable superclass for AAT
=head1 METHODS
=cut
use strict;
use Font::TTF::Utils;
use Font::TTF::AATutils;
use IO::File;
require Font::TTF::Mort::Rearrangement;
require Font::TTF::Mort::Contextual;
require Font::TTF::Mort::Ligature;
require Font::TTF::Mort::Noncontextual;
require Font::TTF::Mort::Insertion;
sub new
{
my ($class) = @_;
my ($self) = {};
$class = ref($class) || $class;
bless $self, $class;
}
sub create
{
my ($class, $type, $coverage, $subFeatureFlags, $length) = @_;
$class = ref($class) || $class;
my $subclass;
if ($type == 0) {
$subclass = 'Font::TTF::Mort::Rearrangement';
}
elsif ($type == 1) {
$subclass = 'Font::TTF::Mort::Contextual';
}
elsif ($type == 2) {
$subclass = 'Font::TTF::Mort::Ligature';
}
elsif ($type == 4) {
$subclass = 'Font::TTF::Mort::Noncontextual';
}
elsif ($type == 5) {
$subclass = 'Font::TTF::Mort::Insertion';
}
my ($self) = $subclass->new(
(($coverage & 0x4000) ? 'RL' : 'LR'),
(($coverage & 0x2000) ? 'VH' : ($coverage & 0x8000) ? 'V' : 'H'),
$subFeatureFlags
);
$self->{'type'} = $type;
$self->{'length'} = $length;
$self;
}
=head2 $t->out($fh)
Writes the table to a file
=cut
sub out
{
my ($self, $fh) = @_;
my ($subtableStart) = $fh->tell();
my ($type) = $self->{'type'};
my ($coverage) = $type;
$coverage += 0x4000 if $self->{'direction'} eq 'RL';
$coverage += 0x2000 if $self->{'orientation'} eq 'VH';
$coverage += 0x8000 if $self->{'orientation'} eq 'V';
$fh->print(TTF_Pack("SSL", 0, $coverage, $self->{'subFeatureFlags'})); # placeholder for length
my ($dat) = $self->pack_sub();
$fh->print($dat);
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);
}
=head2 $t->print($fh)
Prints a human-readable representation of the table
=cut
sub post
{
my ($self) = @_;
my ($post) = $self->{' PARENT'}{' PARENT'}{' PARENT'}{'post'};
if (defined $post) {
$post->read;
}
else {
$post = {};
}
return $post;
}
sub feat
{
my ($self) = @_;
return $self->{' PARENT'}->feat();
}
sub print
{
my ($self, $fh) = @_;
my ($feat) = $self->feat();
my ($post) = $self->post();
$fh = 'STDOUT' unless defined $fh;
my ($type) = $self->{'type'};
my ($subFeatureFlags) = $self->{'subFeatureFlags'};
my ($defaultFlags) = $self->{' PARENT'}{'defaultFlags'};
my ($featureEntries) = $self->{' PARENT'}{'featureEntries'};
$fh->printf("\n\t%s table, %s, %s, subFeatureFlags = %08x # %s (%s)\n",
subtable_type_($type), $_->{'direction'}, $_->{'orientation'}, $subFeatureFlags,
"Default " . ((($subFeatureFlags & $defaultFlags) != 0) ? "On" : "Off"),
join(", ",
map {
join(": ", $feat->settingName($_->{'type'}, $_->{'setting'}) )
} grep { ($_->{'enable'} & $subFeatureFlags) != 0 } @$featureEntries
) );
}
sub subtable_type_
{
my ($val) = @_;
my ($res);
my (@types) = (
'Rearrangement',
'Contextual',
'Ligature',
undef,
'Non-contextual',
'Insertion',
);
$res = $types[$val] or ('Undefined (' . $val . ')');
$res;
}
=head2 $t->print_classes($fh)
Prints a human-readable representation of the table
=cut
sub print_classes
{
my ($self, $fh) = @_;
my ($post) = $self->post();
my ($classes) = $self->{'classes'};
foreach (0 .. $#$classes) {
my $class = $classes->[$_];
if (defined $class) {
$fh->printf("\t\tClass %d:\t%s\n", $_, join(", ", map { $_ . " [" . $post->{'VAL'}[$_] . "]" } @$class));
}
}
}
1;
=head1 BUGS
None known
=head1 AUTHOR
Jonathan Kew L<Jonathan_Kew@sil.org>.
=head1 LICENSING
Copyright (c) 1998-2013, SIL International (http://www.sil.org)
This module is released under the terms of the Artistic License 2.0.
For details, see the full text of the license in the file LICENSE.
=cut
|
