#=======================================================================
# ____ ____ _____ _ ____ ___ ____
# | _ \| _ \| ___| _ _ / \ | _ \_ _| |___ \
# | |_) | | | | |_ (_) (_) / _ \ | |_) | | __) |
# | __/| |_| | _| _ _ / ___ \| __/| | / __/
# |_| |____/|_| (_) (_) /_/ \_\_| |___| |_____|
#
# 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: Bsln.pm,v 1.3 2003/12/08 13:05:22 Administrator Exp $
#
#=======================================================================
=head1 NAME
PDF::API2::Basic::TTF::AAT::Bsln - Baseline table in a font
=head1 DESCRIPTION
=head1 INSTANCE VARIABLES
=item version
=item xformat
=item defaultBaseline
=item deltas
=item stdGlyph
=item ctlPoints
=item lookupFormat
=item lookup
=head1 METHODS
=cut
use strict;
use vars qw(@ISA);
@ISA = qw(PDF::API2::Basic::TTF::Table);
=head2 $t->read
Reads the table into memory
=cut
sub read
{
my ($self) = @_;
my ($dat, $fh);
$self->SUPER::read or return $self;
$fh = $self->{' INFILE'};
$fh->read($dat, 8);
my ($version, $format, $defaultBaseline) = TTF_Unpack("fSS", $dat);
if ($format == 0 or $format == 1) {
$fh->read($dat, 64);
$self->{'deltas'} = [TTF_Unpack("s*", $dat)];
}
elsif ($format == 2 or $format == 3) {
$fh->read($dat, 2);
$self->{'stdGlyph'} = unpack("n", $dat);
$fh->read($dat, 64);
$self->{'ctlPoints'} = unpack("n*", $dat);
}
else {
die "unknown table format";
}
if ($format == 1 or $format == 3) {
my $len = $self->{' LENGTH'} - ($fh->tell() - $self->{' OFFSET'});
my ($lookupFormat, $lookup) = AAT_read_lookup($fh, 2, $len, $defaultBaseline);
$self->{'lookupFormat'} = $lookupFormat;
$self->{'lookup'} = $lookup;
}
$self->{'version'} = $version;
$self->{'format'} = $format;
$self->{'defaultBaseline'} = $defaultBaseline;
$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 $format = $self->{'format'};
my $defaultBaseline = $self->{'defaultBaseline'};
$fh->print(TTF_Pack("fSS", $self->{'version'}, $format, $defaultBaseline));
AAT_write_lookup($fh, $self->{'lookupFormat'}, $self->{'lookup'}, 2, $defaultBaseline) if ($format == 1 or $format == 3);
}
=head2 $t->print($fh)
Prints a human-readable representation of the table
=cut
sub print
{
my ($self, $fh) = @_;
$self->read;
$fh = 'STDOUT' unless defined $fh;
my $format = $self->{'format'};
$fh->printf("version %f\nformat %d\ndefaultBaseline %d\n", $self->{'version'}, $format, $self->{'defaultBaseline'});
if ($format == 0 or $format == 1) {
$fh->printf("\tdeltas:\n");
my $deltas = $self->{'deltas'};
foreach (0 .. 31) {
$fh->printf("\t\t%d: %d%s\n", $_, $deltas->[$_], defined baselineName_($_) ? "\t# " . baselineName_($_) : "");
}
}
if ($format == 2 or $format == 3) {
$fh->printf("\tstdGlyph = %d\n", $self->{'stdGlyph'});
my $ctlPoints = $self->{'ctlPoints'};
foreach (0 .. 31) {
$fh->printf("\t\t%d: %d%s\n", $_, $ctlPoints->[$_], defined baselineName_($_) ? "\t# " . baselineName_($_) : "");
}
}
if ($format == 1 or $format == 3) {
$fh->printf("lookupFormat %d\n", $self->{'lookupFormat'});
my $lookup = $self->{'lookup'};
foreach (sort { $a <=> $b } keys %$lookup) {
$fh->printf("\tglyph %d: %d%s\n", $_, $lookup->{$_}, defined baselineName_($_) ? "\t# " . baselineName_($_) : "");
}
}
}
sub baselineName_
{
my ($b) = @_;
my @baselines = ( 'Roman', 'Ideographic centered', 'Ideographic low', 'Hanging', 'Math' );
$baselines[$b];
}
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