X-Git-Url: https://git.mdrn.pl/librarian.git/blobdiff_plain/e9aeedc51047d8d5e9e45c5253c776f8994da965..3a0c83394d5783715fab2be29fa1a9cfc3574e28:/src/librarian/font-optimizer/ext/Font-TTF/lib/Font/TTF/Ttc.pm

diff --git a/src/librarian/font-optimizer/ext/Font-TTF/lib/Font/TTF/Ttc.pm b/src/librarian/font-optimizer/ext/Font-TTF/lib/Font/TTF/Ttc.pm
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--- a/src/librarian/font-optimizer/ext/Font-TTF/lib/Font/TTF/Ttc.pm
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-package Font::TTF::Ttc;
-
-=head1 NAME
-
-Font::TTF::Ttc - Truetype Collection class
-
-=head1 DESCRIPTION
-
-A TrueType collection is a collection of TrueType fonts in one file in which
-tables may be shared between different directories. In order to support this,
-the TTC introduces the concept of a table being shared by different TrueType
-fonts. This begs the question of what should happen to the ' PARENT' property
-of a particular table. It is made to point to the first directory object which
-refers to it. It is therefore up to the application to sort out any confusion.
-Confusion only occurs if shared tables require access to non-shared tables.
-This should not happen since the shared tables are dealing with glyph
-information only and the private tables are dealing with encoding and glyph
-identification. Thus the general direction is from identification to glyph and
-not the other way around (at least not without knowledge of the particular
-context).
-
-=head1 INSTANCE VARIABLES
-
-The following instance variables are preceded by a space
-
-=over 4
-
-=item fname (P)
-
-Filename for this TrueType Collection
-
-=item INFILE (P)
-
-The filehandle of this collection
-
-=back
-
-The following instance variable does not start with a space
-
-=over 4
-
-=item directs
-
-An array of directories (Font::TTF::Font objects) for each sub-font in the directory
-
-=back
-
-=head1 METHODS
-
-=cut
-
-use strict;
-use vars qw($VERSION);
-
-use IO::File;
-
-$VERSION = 0.0001;
-
-=head2 Font::TTF::Ttc->open($fname)
-
-Opens and reads the given filename as a TrueType Collection. Reading a collection
-involves reading each of the directories which go to make up the collection.
-
-=cut
-
-sub open
-{
-    my ($class, $fname) = @_;
-    my ($self) = {};
-    my ($fh);
-
-    unless (ref($fname))
-    {
-        $fh = IO::File->new($fname) or return undef;
-        binmode $fh;
-    } else
-    { $fh = $fname; }
-    
-    bless $self, $class;
-    $self->{' INFILE'} = $fh;
-    $self->{' fname'} = $fname;
-    $fh->seek(0, 0);
-    $self->read;
-}
-
-
-=head2 $c->read
-
-Reads a Collection by reading all the directories in the collection
-
-=cut
-
-sub read
-{
-    my ($self) = @_;
-    my ($fh) = $self->{' INFILE'};
-    my ($dat, $ttc, $ver, $num, $i, $loc);
-
-    $fh->read($dat, 12);
-    ($ttc, $ver, $num) = unpack("A4N2", $dat);
-
-    return undef unless $ttc eq "ttcf";
-    $fh->read($dat, $num << 2);
-    for ($i = 0; $i < $num; $i++)
-    {
-        $loc = unpack("N", substr($dat, $i << 2, 4));       
-        $self->{'directs'}[$i] = Font::TTF::Font->new('INFILE' => $fh,
-                                                'PARENT' => $self,
-                                                'OFFSET' => $loc) || return undef;
-    }
-    for ($i = 0; $i < $num; $i++)
-    { $self->{'directs'}[$i]->read; }
-    $self;
-}
-
-
-=head2 $c->find($direct, $name, $check, $off, $len)
-
-Hunts around to see if a table with the given characteristics of name, checksum,
-offset and length has been associated with a directory earlier in the list.
-Actually on checks the offset since no two tables can share the same offset in
-a TrueType font, collection or otherwise.
-
-=cut
-
-sub find
-{
-    my ($self, $direct, $name, $check, $off, $len) = @_;
-    my ($d);
-
-    foreach $d (@{$self->{'directs'}})
-    {
-        return undef if $d eq $direct;
-        next unless defined $d->{$name};
-        return $d->{$name} if ($d->{$name}{' OFFSET'} == $off);
-    }
-    undef;              # wierd that the font passed is not in the list!
-}
-
-
-=head2 $c->DESTROY
-
-Closees any opened files by us
-
-=cut
-
-sub DESTROY
-{
-    my ($self) = @_;
-    close ($self->{' INFILE'});
-    undef;
-}
-
-=head1 BUGS
-
-No known bugs, but then not ever executed!
-
-=head1 AUTHOR
-
-Martin Hosken Martin_Hosken@sil.org. See L<Font::TTF::Font> for copyright and
-licensing.
-
-=cut
-