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|
package Font::TTF::Kern::Subtable;
=head1 NAME
Font::TTF::Kern::Subtable - Kern Subtable superclass for AAT
=head1 METHODS
=cut
use strict;
use Font::TTF::Utils;
use Font::TTF::AATutils;
use IO::File;
require Font::TTF::Kern::OrderedList;
require Font::TTF::Kern::StateTable;
require Font::TTF::Kern::ClassArray;
require Font::TTF::Kern::CompactClassArray;
sub new
{
my ($class) = @_;
my ($self) = {};
$class = ref($class) || $class;
bless $self, $class;
}
sub create
{
my ($class, $type, $coverage, $length) = @_;
$class = ref($class) || $class;
my $subclass;
if ($type == 0) {
$subclass = 'Font::TTF::Kern::OrderedList';
}
elsif ($type == 1) {
$subclass = 'Font::TTF::Kern::StateTable';
}
elsif ($type == 2) {
$subclass = 'Font::TTF::Kern::ClassArray';
}
elsif ($type == 3) {
$subclass = 'Font::TTF::Kern::CompactClassArray';
}
my @options;
push @options,'vertical' if ($coverage & 0x8000) != 0;
push @options,'crossStream' if ($coverage & 0x4000) != 0;
push @options,'variation' if ($coverage & 0x2000) != 0;
my ($subTable) = $subclass->new(@options);
map { $subTable->{$_} = 1 } @options;
$subTable->{'type'} = $type;
$subTable->{'length'} = $length;
$subTable;
}
=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 += 0x8000 if $self->{'vertical'};
$coverage += 0x4000 if $self->{'crossStream'};
$coverage += 0x2000 if $self->{'variation'};
$fh->print(TTF_Pack("LSS", 0, $coverage, $self->{'tupleIndex'})); # placeholder for length
$self->out_sub($fh);
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'}{'post'};
if (defined $post) {
$post->read;
}
else {
$post = {};
}
return $post;
}
sub print
{
my ($self, $fh) = @_;
my $post = $self->post();
$fh = 'STDOUT' unless defined $fh;
}
=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 { $_ . " [" . $post->{'VAL'}[$_] . "]" } @$class));
}
}
}
sub dumpClasses
{
my ($self, $classes, $fh) = @_;
my $post = $self->post();
foreach (0 .. $#$classes) {
my $c = $classes->[$_];
if ($#$c > -1) {
$fh->printf("<class n=\"%s\">\n", $_);
foreach (@$c) {
$fh->printf("<g index=\"%s\" name=\"%s\"/>\n", $_, $post->{'VAL'}[$_]);
}
$fh->printf("</class>\n");
}
}
}
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
|
