+++ /dev/null
-package Font::TTF::Hhea;
-
-=head1 NAME
-
-Font::TTF::Hhea - Horizontal Header table
-
-=head1 DESCRIPTION
-
-This is a simplte table with just standards specified instance variables
-
-=head1 INSTANCE VARIABLES
-
- version
- Ascender
- Descender
- LineGap
- advanceWidthMax
- minLeftSideBearing
- minRightSideBearing
- xMaxExtent
- caretSlopeRise
- caretSlopeRun
- metricDataFormat
- numberOfHMetrics
-
-
-=head1 METHODS
-
-=cut
-
-use strict;
-use vars qw(@ISA %fields @field_info);
-
-require Font::TTF::Table;
-use Font::TTF::Utils;
-
-@ISA = qw(Font::TTF::Table);
-@field_info = (
- 'version' => 'v',
- 'Ascender' => 's',
- 'Descender' => 's',
- 'LineGap' => 's',
- 'advanceWidthMax' => 'S',
- 'minLeftSideBearing' => 's',
- 'minRightSideBearing' => 's',
- 'xMaxExtent' => 's',
- 'caretSlopeRise' => 's',
- 'caretSlopeRun' => 's',
- 'metricDataFormat' => '+10s',
- 'numberOfHMetrics' => 'S');
-
-sub init
-{
- my ($k, $v, $c, $i);
- for ($i = 0; $i < $#field_info; $i += 2)
- {
- ($k, $v, $c) = TTF_Init_Fields($field_info[$i], $c, $field_info[$i + 1]);
- next unless defined $k && $k ne "";
- $fields{$k} = $v;
- }
-}
-
-
-=head2 $t->read
-
-Reads the table into memory as instance variables
-
-=cut
-
-sub read
-{
- my ($self) = @_;
- my ($dat);
-
- $self->SUPER::read or return $self;
- init unless defined $fields{'Ascender'};
- $self->{' INFILE'}->read($dat, 36);
-
- TTF_Read_Fields($self, $dat, \%fields);
- $self;
-}
-
-
-=head2 $t->out($fh)
-
-Writes the table to a file either from memory or by copying.
-
-=cut
-
-sub out
-{
- my ($self, $fh) = @_;
-
- return $self->SUPER::out($fh) unless $self->{' read'};
-
- $self->{'numberOfHMetrics'} = $self->{' PARENT'}{'hmtx'}->numMetrics || $self->{'numberOfHMetrics'};
- $fh->print(TTF_Out_Fields($self, \%fields, 36));
- $self;
-}
-
-
-=head2 $t->update
-
-Updates various parameters in the hhea table from the hmtx table.
-
-=cut
-
-sub update
-{
- my ($self) = @_;
- my ($hmtx) = $self->{' PARENT'}{'hmtx'};
- my ($glyphs);
- my ($num, $res);
- my ($i, $maw, $mlsb, $mrsb, $mext, $aw, $lsb, $ext);
-
- return undef unless ($self->SUPER::update);
- return undef unless (defined $hmtx && defined $self->{' PARENT'}{'loca'});
-
- $hmtx->read->update;
- $self->{' PARENT'}{'loca'}->read->update;
- $glyphs = $self->{' PARENT'}{'loca'}{'glyphs'};
- $num = $self->{' PARENT'}{'maxp'}{'numGlyphs'};
-
- for ($i = 0; $i < $num; $i++)
- {
- $aw = $hmtx->{'advance'}[$i];
- $lsb = $hmtx->{'lsb'}[$i];
- if (defined $glyphs->[$i])
- { $ext = $lsb + $glyphs->[$i]->read->{'xMax'} - $glyphs->[$i]{'xMin'}; }
- else
- { $ext = $aw; }
- $maw = $aw if ($aw > $maw);
- $mlsb = $lsb if ($lsb < $mlsb or $i == 0);
- $mrsb = $aw - $ext if ($aw - $ext < $mrsb or $i == 0);
- $mext = $ext if ($ext > $mext);
- }
- $self->{'advanceWidthMax'} = $maw;
- $self->{'minLeftSideBearing'} = $mlsb;
- $self->{'minRightSideBearing'} = $mrsb;
- $self->{'xMaxExtent'} = $mext;
- $self->{'numberOfHMetrics'} = $hmtx->numMetrics;
- $self;
-}
-
-
-1;
-
-
-=head1 BUGS
-
-None known
-
-=head1 AUTHOR
-
-Martin Hosken Martin_Hosken@sil.org. See L<Font::TTF::Font> for copyright and
-licensing.
-
-=cut
-