#=======================================================================
# ____ ____ _____ _ ____ ___ ____
# | _ \| _ \| ___| _ _ / \ | _ \_ _| |___ \
# | |_) | | | | |_ (_) (_) / _ \ | |_) | | __) |
# | __/| |_| | _| _ _ / ___ \| __/| | / __/
# |_| |____/|_| (_) (_) /_/ \_\_| |___| |_____|
#
# A Perl Module Chain to faciliate the Creation and Modification
# of High-Quality "Portable Document Format (PDF)" Files.
#
#=======================================================================
#
# THIS IS A REUSED PERL MODULE, FOR PROPER LICENCING TERMS SEE BELOW:
#
#
# Copyright Jonathan Kew L<Jonathan_Kew@sil.org>
#
# No warranty or expression of effectiveness, least of all regarding
# anyone's safety, is implied in this software or documentation.
#
# This specific module is licensed under the Perl Artistic License.
#
#
# $Id: Insertion.pm,v 2.0 2005/11/16 02:16:00 areibens Exp $
#
#=======================================================================
=head1 NAME
PDF::API2::Basic::TTF::Mort::Insertion
=head1 METHODS
=cut
use strict;
use vars qw(@ISA);
@ISA = qw(PDF::API2::Basic::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 $subtableStart = $fh->tell();
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;
}
}
}
$self->{'classes'} = $classes;
$self->{'states'} = $states;
$self->{'insertLists'} = $insertLists;
$self;
}
=head2 $t->pack_sub()
=cut
sub pack_sub
{
my ($self) = @_;
my ($dat) = pack("nnnn", (0) x 4);
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 {
my $actions = $_->{'actions'};
( $_->{'flags'}, @$actions )
}
);
$dat .= $dat1;
my $entryTable = length($dat);
my $offset = ($entryTable + 8 * @$entries);
my @insListOffsets;
my $insertLists = $self->{'insertLists'};
foreach (@$insertLists) {
push @insListOffsets, $offset;
$offset += 2 * scalar @$_;
}
foreach (@$entries) {
my ($nextState, $flags, @lists) = split /,/;
$flags &= ~0x03ff;
$flags |= (scalar @{$insertLists->[$lists[0]]}) << 5 if $lists[0] ne '';
$flags |= (scalar @{$insertLists->[$lists[1]]}) if $lists[1] ne '';
$dat .= pack("nnnn", $nextState, $flags,
map { $_ eq '' ? 0 : $insListOffsets[$_] } @lists);
}
foreach (@$insertLists) {
$dat .= pack("n*", @$_);
}
$dat1 = pack("nnnn", $stateSize, $classTable, $stateArray, $entryTable);
substr($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);
my $actions = $_->{'actions'};
$fh->printf("\t(%s%d,%s,%s)", $flags, $_->{'nextState'}, map { defined $_ ? $_ : "=" } @$actions);
}
$fh->print("\n");
}
$fh->print("\n");
my $insertLists = $self->{'insertLists'};
foreach (0 .. $#$insertLists) {
my $insertList = $insertLists->[$_];
$fh->printf("\t\tList %d: %s\n", $_, join(", ", map { $_ . " [" . $post->{'VAL'}[$_] . "]" } @$insertList));
}
}
1;
=head1 BUGS
None known
=head1 AUTHOR
Jonathan Kew L<Jonathan_Kew@sil.org>. See L<PDF::API2::Basic::TTF::Font> for copyright and
licensing.
=cut