181 lines
3.7 KiB
Perl
181 lines
3.7 KiB
Perl
package Font::TTF::Glyf;
|
|
|
|
=head1 NAME
|
|
|
|
Font::TTF::Glyf - The Glyf data table
|
|
|
|
=head1 DESCRIPTION
|
|
|
|
This is a stub table. The real data is held in the loca table. If you want to get a glyf
|
|
look it up in the loca table as C<$f->{'loca'}{'glyphs'}[$num]>. It will not be here!
|
|
|
|
The difference between reading this table as opposed to the loca table is that
|
|
reading this table will cause updated glyphs to be written out rather than just
|
|
copying the glyph information from the input file. This causes font writing to be
|
|
slower. So read the glyf as opposed to the loca table if you want to change glyf
|
|
data. Read the loca table only if you are just wanting to read the glyf information.
|
|
|
|
This class is used when writing the glyphs though.
|
|
|
|
=head1 METHODS
|
|
|
|
=cut
|
|
|
|
|
|
use strict;
|
|
use vars qw(@ISA);
|
|
@ISA = qw(Font::TTF::Table);
|
|
|
|
=head2 $t->read
|
|
|
|
Reads the C<loca> table instead!
|
|
|
|
=cut
|
|
|
|
sub read
|
|
{
|
|
my ($self) = @_;
|
|
|
|
$self->{' PARENT'}{'loca'}->read;
|
|
$self->{' read'} = 1;
|
|
$self;
|
|
}
|
|
|
|
# Internal function called by loca -- decompresses WOFF data if needed.
|
|
|
|
sub _read
|
|
{
|
|
my ($self) = @_;
|
|
$self->SUPER::read or return $self;
|
|
|
|
# Nothing else to do
|
|
$self;
|
|
}
|
|
|
|
=head2 $t->out($fh)
|
|
|
|
Writes out all the glyphs in the parent's location table, calculating a new
|
|
output location for each one.
|
|
|
|
=cut
|
|
|
|
# ' match for syntax coloring
|
|
|
|
sub out
|
|
{
|
|
my ($self, $fh) = @_;
|
|
my ($i, $loca, $offset, $numGlyphs);
|
|
|
|
return $self->SUPER::out($fh) unless $self->{' read'};
|
|
|
|
$loca = $self->{' PARENT'}{'loca'}{'glyphs'};
|
|
$numGlyphs = $self->{' PARENT'}{'maxp'}{'numGlyphs'};
|
|
|
|
$offset = 0;
|
|
for ($i = 0; $i < $numGlyphs; $i++)
|
|
{
|
|
next unless defined $loca->[$i];
|
|
$loca->[$i]->update;
|
|
$loca->[$i]{' OUTLOC'} = $offset;
|
|
$loca->[$i]->out($fh);
|
|
$offset += $loca->[$i]{' OUTLEN'};
|
|
}
|
|
$self->{' PARENT'}{'head'}{'indexToLocFormat'} = ($offset >= 0x20000);
|
|
$self;
|
|
}
|
|
|
|
|
|
=head2 $t->out_xml($context, $depth)
|
|
|
|
Outputs all the glyphs in the glyph table just where they are supposed to be output!
|
|
|
|
=cut
|
|
|
|
sub out_xml
|
|
{
|
|
my ($self, $context, $depth) = @_;
|
|
my ($fh) = $context->{'fh'};
|
|
my ($loca, $i, $numGlyphs);
|
|
|
|
$loca = $self->{' PARENT'}{'loca'}{'glyphs'};
|
|
$numGlyphs = $self->{' PARENT'}{'maxp'}{'numGlyphs'};
|
|
|
|
for ($i = 0; $i < $numGlyphs; $i++)
|
|
{
|
|
$context->{'gid'} = $i;
|
|
$loca->[$i]->out_xml($context, $depth) if (defined $loca->[$i]);
|
|
}
|
|
|
|
$self;
|
|
}
|
|
|
|
|
|
=head2 $t->XML_start($context, $tag, %attrs)
|
|
|
|
Pass control to glyphs as they occur
|
|
|
|
=cut
|
|
|
|
sub XML_start
|
|
{
|
|
my ($self) = shift;
|
|
my ($context, $tag, %attrs) = @_;
|
|
|
|
if ($tag eq 'glyph')
|
|
{
|
|
$context->{'tree'}[-1] = Font::TTF::Glyph->new(read => 2, PARENT => $self->{' PARENT'});
|
|
$context->{'receiver'} = $context->{'tree'}[-1];
|
|
}
|
|
}
|
|
|
|
|
|
=head2 $t->XML_end($context, $tag, %attrs)
|
|
|
|
Collect up glyphs and put them into the loca table
|
|
|
|
=cut
|
|
|
|
sub XML_end
|
|
{
|
|
my ($self) = shift;
|
|
my ($context, $tag, %attrs) = @_;
|
|
|
|
if ($tag eq 'glyph')
|
|
{
|
|
unless (defined $context->{'glyphs'})
|
|
{
|
|
if (defined $self->{' PARENT'}{'loca'})
|
|
{ $context->{'glyphs'} = $self->{' PARENT'}{'loca'}{'glyphs'}; }
|
|
else
|
|
{ $context->{'glyphs'} = []; }
|
|
}
|
|
$context->{'glyphs'}[$attrs{'gid'}] = $context->{'tree'}[-1];
|
|
return $context;
|
|
} else
|
|
{ return $self->SUPER::XML_end(@_); }
|
|
}
|
|
|
|
1;
|
|
|
|
=head1 BUGS
|
|
|
|
None known
|
|
|
|
=head1 AUTHOR
|
|
|
|
Martin Hosken L<http://scripts.sil.org/FontUtils>.
|
|
|
|
|
|
=head1 LICENSING
|
|
|
|
Copyright (c) 1998-2016, 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
|
|
|
|
|