X-Git-Url: https://git.mdrn.pl/librarian.git/blobdiff_plain/ef7911fba9c330552599bc6eb9dc22606246dd7e..68b03397a0872d10d3627cea2b92ae36bd59183c:/font-optimizer/ext/Font-TTF/lib/Font/TTF/Feat.pm

diff --git a/font-optimizer/ext/Font-TTF/lib/Font/TTF/Feat.pm b/font-optimizer/ext/Font-TTF/lib/Font/TTF/Feat.pm
new file mode 100644
index 0000000..c837f41
--- /dev/null
+++ b/font-optimizer/ext/Font-TTF/lib/Font/TTF/Feat.pm
@@ -0,0 +1,191 @@
+package Font::TTF::Feat;
+
+=head1 NAME
+
+Font::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 Font::TTF::Utils;
+
+require Font::TTF::Table;
+
+@ISA = qw(Font::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("vS", $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("vSSL", $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<Font::TTF::Font> for copyright and
+licensing.
+
+=cut
+