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package Font::TTF::Cvt_;
=head1 NAME
Font::TTF::Cvt_ - Control Value Table in a TrueType font
=head1 DESCRIPTION
This is a minimal class adding nothing beyond a table, but is a repository
for cvt type information for those processes brave enough to address hinting.
=head1 INSTANCE VARIABLES
=over 4
=item val
This is an array of CVT values. Thus access to the CVT is via:
$f->{'cvt_'}{'val'}[$num];
=back
=head1 METHODS
=cut
use strict;
use vars qw(@ISA $VERSION);
use Font::TTF::Utils;
@ISA = qw(Font::TTF::Table);
$VERSION = 0.0001;
=head2 $t->read
Reads the CVT table into both the tables C<' dat'> variable and the C<val>
array.
=cut
sub read
{
my ($self) = @_;
$self->read_dat || return undef;
$self->{' read'} = 1;
$self->{'val'} = [TTF_Unpack("s*", $self->{' dat'})];
$self;
}
=head2 $t->update
Updates the RAM file copy C<' dat'> to be the same as the array.
=cut
sub update
{
my ($self) = @_;
return undef unless ($self->{' read'} && $#{$self->{'val'}} >= 0);
$self->{' dat'} = TTF_Pack("s*", @{$self->{'val'}});
$self;
}
1;
=head1 BUGS
None known
=head1 AUTHOR
Martin Hosken L<Martin_Hosken@sil.org>.
=head1 LICENSING
Copyright (c) 1998-2013, SIL International (http://www.sil.org)
This module is released under the terms of the Artistic License 2.0.
For details, see the full text of the license in the file LICENSE.
=cut
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