X-Git-Url: https://git.mdrn.pl/librarian.git/blobdiff_plain/e316fc14bef26f958937aec0e6854b61f71a3b34..09dded3d8606e8e4406fffcf477ceb4a1c97fee2:/librarian/font-optimizer/ext/Font-TTF/lib/Font/TTF/Mort/Ligature.pm

diff --git a/librarian/font-optimizer/ext/Font-TTF/lib/Font/TTF/Mort/Ligature.pm b/librarian/font-optimizer/ext/Font-TTF/lib/Font/TTF/Mort/Ligature.pm
new file mode 100644
index 0000000..c5cc912
--- /dev/null
+++ b/librarian/font-optimizer/ext/Font-TTF/lib/Font/TTF/Mort/Ligature.pm
@@ -0,0 +1,246 @@
+package Font::TTF::Mort::Ligature;
+
+=head1 NAME
+
+Font::TTF::Mort::Ligature - Ligature Mort subtable for AAT
+
+=head1 METHODS
+
+=cut
+
+use strict;
+use vars qw(@ISA);
+use Font::TTF::Utils;
+use Font::TTF::AATutils;
+use IO::File;
+
+@ISA = qw(Font::TTF::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, 0);
+    
+    $fh->seek($stateTableStart, IO::File::SEEK_SET);
+    $fh->read($dat, 14);
+    my ($stateSize, $classTable, $stateArray, $entryTable,
+        $ligActionTable, $componentTable, $ligatureTable) = unpack("nnnnnnn", $dat);
+    my $limits = [$classTable, $stateArray, $entryTable, $ligActionTable, $componentTable, $ligatureTable, $self->{'length'} - 8];
+    
+    my %actions;
+    my $actionLists;
+    foreach (@$entries) {
+        my $offset = $_->{'flags'} & 0x3fff;
+        $_->{'flags'} &= ~0x3fff;
+        if ($offset != 0) {
+            if (not defined $actions{$offset}) {
+                $fh->seek($stateTableStart + $offset, IO::File::SEEK_SET);
+                my $actionList;
+                while (1) {
+                    $fh->read($dat, 4);
+                    my $action = unpack("N", $dat);
+                    my ($last, $store, $component) = (($action & 0x80000000) != 0, ($action & 0xC0000000) != 0, ($action & 0x3fffffff));
+                    $component -= 0x40000000 if $component > 0x1fffffff;
+                    $component -= $componentTable / 2;
+                    push @$actionList, { 'store' => $store, 'component' => $component };
+                    last if $last;
+                }
+                push @$actionLists, $actionList;
+                $actions{$offset} = $#$actionLists;
+            }
+            $_->{'actions'} = $actions{$offset};
+        }
+    }
+    
+    $self->{'componentTable'} = $componentTable;
+    my $components = [unpack("n*", AAT_read_subtable($fh, $stateTableStart, $componentTable, $limits))];
+    foreach (@$components) {
+        $_ = ($_ - $ligatureTable) . " +" if $_ >= $ligatureTable;
+    }
+    $self->{'components'} = $components;
+    
+    $self->{'ligatureTable'} = $ligatureTable;
+    $self->{'ligatures'} = [unpack("n*", AAT_read_subtable($fh, $stateTableStart, $ligatureTable, $limits))];
+    
+    $self->{'classes'} = $classes;
+    $self->{'states'} = $states;
+    $self->{'actionLists'} = $actionLists;
+        
+    $self;
+}
+
+=head2 $t->pack_sub($fh)
+
+=cut
+
+sub pack_sub
+{
+    my ($self) = @_;
+    my ($dat);
+    
+    $dat .= pack("nnnnnnn", (0) x 7);    # placeholders for stateSize, classTable, stateArray, entryTable, actionLists, components, ligatures
+
+    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 {
+                ( $_->{'flags'} & 0xc000, $_->{'actions'} )
+            }
+        );
+    $dat .= $dat1;
+    
+    my $actionLists = $self->{'actionLists'};
+    my %actionListOffset;
+    my $actionListDataLength = 0;
+    my @actionListEntries;
+    foreach (0 .. $#$entries) {
+        my ($nextState, $flags, $offset) = split(/,/, $entries->[$_]);
+        if ($offset eq "") {
+            $offset = undef;
+        }
+        else {
+            if (defined $actionListOffset{$offset}) {
+                $offset = $actionListOffset{$offset};
+            }
+            else {
+                $actionListOffset{$offset} = $actionListDataLength;
+                my $list = $actionLists->[$offset];
+                $actionListDataLength += 4 * @$list;
+                push @actionListEntries, $list;
+                $offset = $actionListOffset{$offset};
+            }
+        }
+        $entries->[$_] = [ $nextState, $flags, $offset ];
+    }
+    my $entryTable = length($dat);
+    my $ligActionLists = ($entryTable + @$entries * 4 + 3) & ~3;
+    foreach (@$entries) {
+        $_->[2] += $ligActionLists if defined $_->[2];
+        $dat .= pack("nn", $_->[0], $_->[1] + $_->[2]);
+    }
+    $dat .= pack("C*", (0) x ($ligActionLists - $entryTable - @$entries * 4));
+    
+    die "internal error" unless length($dat) == $ligActionLists;
+    
+    my $componentTable = length($dat) + $actionListDataLength;
+    my $actionList;
+    foreach $actionList (@actionListEntries) {
+        foreach (0 .. $#$actionList) {
+            my $action = $actionList->[$_];
+            my $val = $action->{'component'} + $componentTable / 2;
+            $val += 0x40000000 if $val < 0;
+            $val &= 0x3fffffff;
+            $val |= 0x40000000 if $action->{'store'};
+            $val |= 0x80000000 if $_ == $#$actionList;
+            $dat .= pack("N", $val);
+        }
+    }
+
+    die "internal error" unless length($dat) == $componentTable;
+
+    my $components = $self->{'components'};
+    my $ligatureTable = $componentTable + @$components * 2;
+    $dat .= pack("n*", map { (index($_, '+') >= 0 ? $ligatureTable : 0) + $_ } @$components);
+    
+    my $ligatures = $self->{'ligatures'};
+    $dat .= pack("n*", @$ligatures);
+    
+    $dat1 = pack("nnnnnnn", $stateSize, $classTable, $stateArray, $entryTable, $ligActionLists, $componentTable, $ligatureTable);
+    substr($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);
+            $fh->printf("\t(%s%d,%s)", $flags, $_->{'nextState'}, defined $_->{'actions'} ? $_->{'actions'} : "=");
+        }
+        $fh->print("\n");
+    }
+
+    $fh->print("\n");
+    my $actionLists = $self->{'actionLists'};
+    foreach (0 .. $#$actionLists) {
+        $fh->printf("\t\tList %d:\t", $_);
+        my $actionList = $actionLists->[$_];
+        $fh->printf("%s\n", join(", ", map { ($_->{'component'} . ($_->{'store'} ? "*" : "") ) } @$actionList));
+    }
+
+    my $ligatureTable = $self->{'ligatureTable'};
+
+    $fh->print("\n");
+    my $components = $self->{'components'};
+    foreach (0 .. $#$components) {
+        $fh->printf("\t\tComponent %d: %s\n", $_, $components->[$_]);
+    }
+    
+    $fh->print("\n");
+    my $ligatures = $self->{'ligatures'};
+    foreach (0 .. $#$ligatures) {
+        $fh->printf("\t\tLigature %d: %d [%s]\n", $_, $ligatures->[$_], $post->{'VAL'}[$ligatures->[$_]]);
+    }
+}
+
+1;
+
+=head1 BUGS
+
+None known
+
+=head1 AUTHOR
+
+Jonathan Kew L<Jonathan_Kew@sil.org>. See L<Font::TTF::Font> for copyright and
+licensing.
+
+=cut
+