embed fonts in epub, stripped to used chars

[librarian.git] / font-optimizer / ext / Font-TTF / lib / Font / TTF / Kern / Subtable.pm

diff --git a/font-optimizer/ext/Font-TTF/lib/Font/TTF/Kern/Subtable.pm b/font-optimizer/ext/Font-TTF/lib/Font/TTF/Kern/Subtable.pm
new file mode 100644 (file)
index 0000000..b1db410
--- /dev/null
+++ b/font-optimizer/ext/Font-TTF/lib/Font/TTF/Kern/Subtable.pm
@@ -0,0 +1,175 @@
+package Font::TTF::Kern::Subtable;
+
+=head1 NAME
+
+Font::TTF::Kern::Subtable - Kern Subtable superclass for AAT
+
+=head1 METHODS
+
+=cut
+
+use strict;
+use Font::TTF::Utils;
+use Font::TTF::AATutils;
+use IO::File;
+
+require Font::TTF::Kern::OrderedList;
+require Font::TTF::Kern::StateTable;
+require Font::TTF::Kern::ClassArray;
+require Font::TTF::Kern::CompactClassArray;
+
+sub new
+{
+    my ($class) = @_;
+    my ($self) = {};
+
+    $class = ref($class) || $class;
+
+    bless $self, $class;
+}
+
+sub create
+{
+    my ($class, $type, $coverage, $length) = @_;
+
+    $class = ref($class) || $class;
+
+    my $subclass;
+    if ($type == 0) {
+        $subclass = 'Font::TTF::Kern::OrderedList';
+    }
+    elsif ($type == 1) {
+        $subclass = 'Font::TTF::Kern::StateTable';
+    }
+    elsif ($type == 2) {
+        $subclass = 'Font::TTF::Kern::ClassArray';
+    }
+    elsif ($type == 3) {
+        $subclass = 'Font::TTF::Kern::CompactClassArray';
+    }
+
+    my @options;
+    push @options,'vertical'    if ($coverage & 0x8000) != 0;
+    push @options,'crossStream' if ($coverage & 0x4000) != 0;
+    push @options,'variation'   if ($coverage & 0x2000) != 0;
+    
+    my ($subTable) = $subclass->new(@options);
+
+    map { $subTable->{$_} = 1 } @options;
+
+    $subTable->{'type'} = $type;
+    $subTable->{'length'} = $length;
+
+    $subTable;
+}
+
+=head2 $t->out($fh)
+
+Writes the table to a file
+
+=cut
+
+sub out
+{
+    my ($self, $fh) = @_;
+    
+    my $subtableStart = $fh->tell();
+    my $type = $self->{'type'};
+    my $coverage = $type;
+    $coverage += 0x8000 if $self->{'vertical'};
+    $coverage += 0x4000 if $self->{'crossStream'};
+    $coverage += 0x2000 if $self->{'variation'};
+    
+    $fh->print(TTF_Pack("LSS", 0, $coverage, $self->{'tupleIndex'}));    # placeholder for length
+    
+    $self->out_sub($fh);
+    
+    my $length = $fh->tell() - $subtableStart;
+    my $padBytes = (4 - ($length & 3)) & 3;
+    $fh->print(pack("C*", (0) x $padBytes));
+    $length += $padBytes;
+    $fh->seek($subtableStart, IO::File::SEEK_SET);
+    $fh->print(pack("N", $length));
+    $fh->seek($subtableStart + $length, IO::File::SEEK_SET);
+}
+
+=head2 $t->print($fh)
+
+Prints a human-readable representation of the table
+
+=cut
+
+sub post
+{
+    my ($self) = @_;
+    
+    my $post = $self->{' PARENT'}{' PARENT'}{'post'};
+    if (defined $post) {
+        $post->read;
+    }
+    else {
+        $post = {};
+    }
+    
+    return $post;
+}
+
+sub print
+{
+    my ($self, $fh) = @_;
+    
+    my $post = $self->post();
+    $fh = 'STDOUT' unless defined $fh;
+}
+
+=head2 $t->print_classes($fh)
+
+Prints a human-readable representation of the table
+
+=cut
+
+sub print_classes
+{
+    my ($self, $fh) = @_;
+    
+    my $post = $self->post();
+    
+    my $classes = $self->{'classes'};
+    foreach (0 .. $#$classes) {
+        my $class = $classes->[$_];
+        if (defined $class) {
+            $fh->printf("\t\tClass %d:\t%s\n", $_, join(", ", map { $_ . " [" . $post->{'VAL'}[$_] . "]" } @$class));
+        }
+    }
+}
+
+sub dumpClasses
+{
+    my ($self, $classes, $fh) = @_;
+    my $post = $self->post();
+    
+    foreach (0 .. $#$classes) {
+        my $c = $classes->[$_];
+        if ($#$c > -1) {
+            $fh->printf("<class n=\"%s\">\n", $_);
+            foreach (@$c) {
+                $fh->printf("<g index=\"%s\" name=\"%s\"/>\n", $_, $post->{'VAL'}[$_]);
+            }
+            $fh->printf("</class>\n");
+        }
+    }
+}
+
+1;
+
+=head1 BUGS
+
+None known
+
+=head1 AUTHOR
+
+Jonathan Kew L<Jonathan_Kew@sil.org>. See L<Font::TTF::Font> for copyright and
+licensing.
+
+=cut
+