Introduce src dir.

[librarian.git] / src / librarian / font-optimizer / ext / Font-TTF / lib / Font / TTF / Mort / Contextual.pm

diff --git a/src/librarian/font-optimizer/ext/Font-TTF/lib/Font/TTF/Mort/Contextual.pm b/src/librarian/font-optimizer/ext/Font-TTF/lib/Font/TTF/Mort/Contextual.pm
new file mode 100644 (file)
index 0000000..fecc519
--- /dev/null
+++ b/src/librarian/font-optimizer/ext/Font-TTF/lib/Font/TTF/Mort/Contextual.pm
@@ -0,0 +1,157 @@
+package Font::TTF::Mort::Contextual;
+
+=head1 NAME
+
+Font::TTF::Mort::Contextual - Contextual Mort subtable for AAT
+
+=head1 METHODS
+
+=cut
+
+use strict;
+use vars qw(@ISA);
+use Font::TTF::Utils;
+use Font::TTF::AATutils;
+use Font::TTF::Mort::Subtable;
+use IO::File;
+
+@ISA = qw(Font::TTF::AAT::Mort::Subtable);
+
+sub new
+{
+    my ($class, $direction, $orientation, $subFeatureFlags) = @_;
+    my ($self) = {
+                    'direction'            => $direction,
+                    'orientation'        => $orientation,
+                    'subFeatureFlags'    => $subFeatureFlags
+                };
+
+    $class = ref($class) || $class;
+    bless $self, $class;
+}
+
+=head2 $t->read
+
+Reads the table into memory
+
+=cut
+
+sub read
+{
+    my ($self, $fh) = @_;
+    my ($dat);
+    
+    my $stateTableStart = $fh->tell();
+    my ($classes, $states, $entries) = AAT_read_state_table($fh, 2);
+
+    $fh->seek($stateTableStart, IO::File::SEEK_SET);
+    $fh->read($dat, 10);
+    my ($stateSize, $classTable, $stateArray, $entryTable, $mappingTables) = unpack("nnnnn", $dat);
+    my $limits = [$classTable, $stateArray, $entryTable, $mappingTables, $self->{'length'} - 8];
+
+    foreach (@$entries) {
+        my $actions = $_->{'actions'};
+        foreach (@$actions) {
+            $_ = $_ ? $_ - ($mappingTables / 2) : undef;
+        }
+    }
+    
+    $self->{'classes'} = $classes;
+    $self->{'states'} = $states;
+    $self->{'mappings'} = [unpack("n*", AAT_read_subtable($fh, $stateTableStart, $mappingTables, $limits))];
+            
+    $self;
+}
+
+=head2 $t->pack_sub()
+
+=cut
+
+sub pack_sub
+{
+    my ($self) = @_;
+    
+    my ($dat) = pack("nnnnn", (0) x 5);    # placeholders for stateSize, classTable, stateArray, entryTable, mappingTables
+    
+    my $classTable = length($dat);
+    my $classes = $self->{'classes'};
+    $dat .= AAT_pack_classes($classes);
+    
+    my $stateArray = length($dat);
+    my $states = $self->{'states'};
+    my ($dat1, $stateSize, $entries) = AAT_pack_states($classes, $stateArray, $states, 
+            sub {
+                my $actions = $_->{'actions'};
+                ( $_->{'flags'}, @$actions )
+            }
+        );
+    $dat .= $dat1;
+    
+    my $entryTable = length($dat);
+    my $offset = ($entryTable + 8 * @$entries) / 2;
+    foreach (@$entries) {
+        my ($nextState, $flags, @parts) = split /,/;
+        $dat .= pack("nnnn", $nextState, $flags, map { $_ eq "" ? 0 : $_ + $offset } @parts);
+    }
+
+    my $mappingTables = length($dat);
+    my $mappings = $self->{'mappings'};
+    $dat .= pack("n*", @$mappings);
+    
+    $dat1 = pack("nnnnn", $stateSize, $classTable, $stateArray, $entryTable, $mappingTables);
+    substr($dat, 0, length($dat1)) = $dat1;
+    
+    return $dat;
+}
+
+=head2 $t->print($fh)
+
+Prints a human-readable representation of the table
+
+=cut
+
+sub print
+{
+    my ($self, $fh) = @_;
+    
+    my $post = $self->post();
+    
+    $fh = 'STDOUT' unless defined $fh;
+
+    $self->print_classes($fh);
+    
+    $fh->print("\n");
+    my $states = $self->{'states'};
+    foreach (0 .. $#$states) {
+        $fh->printf("\t\tState %d:", $_);
+        my $state = $states->[$_];
+        foreach (@$state) {
+            my $flags;
+            $flags .= "!" if ($_->{'flags'} & 0x4000);
+            $flags .= "*" if ($_->{'flags'} & 0x8000);
+            my $actions = $_->{'actions'};
+            $fh->printf("\t(%s%d,%s,%s)", $flags, $_->{'nextState'}, map { defined $_ ? $_ : "=" } @$actions);
+        }
+        $fh->print("\n");
+    }
+
+    $fh->print("\n");
+    my $mappings = $self->{'mappings'};
+    foreach (0 .. $#$mappings) {
+        $fh->printf("\t\tMapping %d: %d [%s]\n", $_, $mappings->[$_], $post->{'VAL'}[$mappings->[$_]]);
+    }
+}
+
+1;
+
+=head1 BUGS
+
+None known
+
+=head1 AUTHOR
+
+Jonathan Kew L<Jonathan_Kew@sil.org>. See L<Font::TTF::Font> for copyright and
+licensing.
+
+=cut
+