package Font::TTF::Bsln;
=head1 NAME
Font::TTF::Bsln - Baseline table in a font
=head1 DESCRIPTION
=head1 INSTANCE VARIABLES
=over
=item version
=item xformat
=item defaultBaseline
=item deltas
=item stdGlyph
=item ctlPoints
=item lookupFormat
=item lookup
=back
=head1 METHODS
=cut
use strict;
use vars qw(@ISA);
use Font::TTF::AATutils;
use Font::TTF::Utils;
require Font::TTF::Table;
@ISA = qw(Font::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("vSS", $dat);
if ($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("vSS", $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>.
=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.
The test suite contains test fonts released under the SIL Open Font License 1.1, see OFL.txt.
=cut