177 lines
3.7 KiB
Perl
177 lines
3.7 KiB
Perl
package Font::TTF::Bsln;
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=head1 NAME
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Font::TTF::Bsln - Baseline table in a font
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=head1 DESCRIPTION
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=head1 INSTANCE VARIABLES
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=over
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=item version
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=item xformat
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=item defaultBaseline
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=item deltas
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=item stdGlyph
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=item ctlPoints
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=item lookupFormat
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=item lookup
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=back
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=head1 METHODS
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=cut
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use strict;
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use vars qw(@ISA);
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use Font::TTF::AATutils;
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use Font::TTF::Utils;
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require Font::TTF::Table;
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@ISA = qw(Font::TTF::Table);
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=head2 $t->read
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Reads the table into memory
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=cut
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sub read
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{
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my ($self) = @_;
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my ($dat, $fh);
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$self->SUPER::read or return $self;
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$fh = $self->{' INFILE'};
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$fh->read($dat, 8);
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my ($version, $format, $defaultBaseline) = TTF_Unpack("vSS", $dat);
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if ($format == 0 or $format == 1) {
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$fh->read($dat, 64);
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$self->{'deltas'} = [TTF_Unpack("s*", $dat)];
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}
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elsif ($format == 2 or $format == 3) {
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$fh->read($dat, 2);
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$self->{'stdGlyph'} = unpack("n", $dat);
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$fh->read($dat, 64);
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$self->{'ctlPoints'} = unpack("n*", $dat);
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}
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else {
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die "unknown table format";
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}
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if ($format == 1 or $format == 3) {
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my $len = $self->{' LENGTH'} - ($fh->tell() - $self->{' OFFSET'});
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my ($lookupFormat, $lookup) = AAT_read_lookup($fh, 2, $len, $defaultBaseline);
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$self->{'lookupFormat'} = $lookupFormat;
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$self->{'lookup'} = $lookup;
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}
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$self->{'version'} = $version;
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$self->{'format'} = $format;
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$self->{'defaultBaseline'} = $defaultBaseline;
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$self;
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}
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=head2 $t->out($fh)
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Writes the table to a file either from memory or by copying
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=cut
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sub out
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{
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my ($self, $fh) = @_;
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return $self->SUPER::out($fh) unless $self->{' read'};
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my $format = $self->{'format'};
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my $defaultBaseline = $self->{'defaultBaseline'};
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$fh->print(TTF_Pack("vSS", $self->{'version'}, $format, $defaultBaseline));
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AAT_write_lookup($fh, $self->{'lookupFormat'}, $self->{'lookup'}, 2, $defaultBaseline) if ($format == 1 or $format == 3);
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}
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=head2 $t->print($fh)
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Prints a human-readable representation of the table
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=cut
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sub print
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{
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my ($self, $fh) = @_;
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$self->read;
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$fh = 'STDOUT' unless defined $fh;
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my $format = $self->{'format'};
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$fh->printf("version %f\nformat %d\ndefaultBaseline %d\n", $self->{'version'}, $format, $self->{'defaultBaseline'});
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if ($format == 0 or $format == 1) {
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$fh->printf("\tdeltas:\n");
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my $deltas = $self->{'deltas'};
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foreach (0 .. 31) {
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$fh->printf("\t\t%d: %d%s\n", $_, $deltas->[$_], defined baselineName_($_) ? "\t# " . baselineName_($_) : "");
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}
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}
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if ($format == 2 or $format == 3) {
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$fh->printf("\tstdGlyph = %d\n", $self->{'stdGlyph'});
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my $ctlPoints = $self->{'ctlPoints'};
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foreach (0 .. 31) {
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$fh->printf("\t\t%d: %d%s\n", $_, $ctlPoints->[$_], defined baselineName_($_) ? "\t# " . baselineName_($_) : "");
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}
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}
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if ($format == 1 or $format == 3) {
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$fh->printf("lookupFormat %d\n", $self->{'lookupFormat'});
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my $lookup = $self->{'lookup'};
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foreach (sort { $a <=> $b } keys %$lookup) {
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$fh->printf("\tglyph %d: %d%s\n", $_, $lookup->{$_}, defined baselineName_($_) ? "\t# " . baselineName_($_) : "");
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}
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}
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}
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sub baselineName_
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{
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my ($b) = @_;
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my @baselines = ( 'Roman', 'Ideographic centered', 'Ideographic low', 'Hanging', 'Math' );
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$baselines[$b];
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}
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1;
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=head1 BUGS
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None known
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=head1 AUTHOR
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Jonathan Kew L<http://scripts.sil.org/FontUtils>.
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=head1 LICENSING
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Copyright (c) 1998-2016, SIL International (http://www.sil.org)
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This module is released under the terms of the Artistic License 2.0.
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For details, see the full text of the license in the file LICENSE.
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=cut
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