#======================================================================= # ____ ____ _____ _ ____ ___ ____ # | _ \| _ \| ___| _ _ / \ | _ \_ _| |___ \ # | |_) | | | | |_ (_) (_) / _ \ | |_) | | __) | # | __/| |_| | _| _ _ / ___ \| __/| | / __/ # |_| |____/|_| (_) (_) /_/ \_\_| |___| |_____| # # 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: Feat.pm,v 1.5 2004/06/15 09:13:37 fredo Exp $ # #======================================================================= package PDF::API2::Basic::TTF::Feat; =head1 NAME PDF::API2::Basic::TTF::Feat - Font Features =head1 DESCRIPTION =head1 INSTANCE VARIABLES =over 4 =item version =item features An array of hashes of the following form =over 8 =item feature feature id number =item name name index in name table =item exclusive exclusive flag =item settings hash of setting number against name string index =back =back =head1 METHODS =cut use strict; use vars qw(@ISA); use PDF::API2::Basic::TTF::Utils; require PDF::API2::Basic::TTF::Table; @ISA = qw(PDF::API2::Basic::TTF::Table); =head2 $t->read Reads the features from the TTF file into memory =cut sub read { my ($self) = @_; my ($featureCount, $features); $self->SUPER::read_dat or return $self; ($self->{'version'}, $featureCount) = TTF_Unpack("fS", $self->{' dat'}); $features = []; foreach (1 .. $featureCount) { my ($feature, $nSettings, $settingTable, $featureFlags, $nameIndex) = TTF_Unpack("SSLSS", substr($self->{' dat'}, $_ * 12, 12)); push @$features, { 'feature' => $feature, 'name' => $nameIndex, 'exclusive' => (($featureFlags & 0x8000) != 0), 'settings' => { TTF_Unpack("S*", substr($self->{' dat'}, $settingTable, $nSettings * 4)) } }; } $self->{'features'} = $features; delete $self->{' dat'}; # no longer needed, and may become obsolete $self; } =head2 $t->out($fh) Writes the features to a TTF file =cut sub out { my ($self, $fh) = @_; my ($features, $numFeatures, $settings, $featuresData, $settingsData); return $self->SUPER::out($fh) unless $self->{' read'}; $features = $self->{'features'}; $numFeatures = @$features; foreach (@$features) { $settings = $_->{'settings'}; $featuresData .= TTF_Pack("SSLSS", $_->{'feature'}, scalar keys %$settings, 12 + 12 * $numFeatures + length $settingsData, ($_->{'exclusive'} ? 0x8000 : 0x0000), $_->{'name'}); foreach (sort {$a <=> $b} keys %$settings) { $settingsData .= TTF_Pack("SS", $_, $settings->{$_}); } } $fh->print(TTF_Pack("fSSL", $self->{'version'}, $numFeatures, 0, 0)); $fh->print($featuresData); $fh->print($settingsData); $self; } =head2 $t->print($fh) Prints a human-readable representation of the table =cut sub print { my ($self, $fh) = @_; my ($names, $features, $settings); $self->read; $names = $self->{' PARENT'}->{'name'}; $names->read; $fh = 'STDOUT' unless defined $fh; $features = $self->{'features'}; foreach (@$features) { $fh->printf("Feature %d, %s, name %d # '%s'\n", $_->{'feature'}, ($_->{'exclusive'} ? "exclusive" : "additive"), $_->{'name'}, $names->{'strings'}[$_->{'name'}][1][0]{0}); $settings = $_->{'settings'}; foreach (sort { $a <=> $b } keys %$settings) { $fh->printf("\tSetting %d, name %d # '%s'\n", $_, $settings->{$_}, $names->{'strings'}[$settings->{$_}][1][0]{0}); } } $self; } sub settingName { my ($self, $feature, $setting) = @_; $self->read; my $names = $self->{' PARENT'}->{'name'}; $names->read; my $features = $self->{'features'}; my ($featureEntry) = grep { $_->{'feature'} == $feature } @$features; my $featureName = $names->{'strings'}[$featureEntry->{'name'}][1][0]{0}; my $settingName = $featureEntry->{'exclusive'} ? $names->{'strings'}[$featureEntry->{'settings'}->{$setting}][1][0]{0} : $names->{'strings'}[$featureEntry->{'settings'}->{$setting & ~1}][1][0]{0} . (($setting & 1) == 0 ? " On" : " Off"); ($featureName, $settingName); } 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