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MHOSKEN / Font-TTF-0.23 / lib / Font / TTF / Cvt_.pm 

            

              
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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 Martin_Hosken@sil.org. See L<Font::TTF::Font> for copyright and
licensing.
=cut