/usr/share/perl5/Font/TTF/Vhea.pm is in libfont-ttf-perl 1.04-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 | package Font::TTF::Vhea;
=head1 NAME
Font::TTF::Vhea - Vertical Header table
=head1 DESCRIPTION
This is a simple table with just standards specified instance variables
=head1 INSTANCE VARIABLES
version
Ascender
Descender
LineGap
advanceHeightMax
minTopSideBearing
minBottomSideBearing
yMaxExtent
caretSlopeRise
caretSlopeRun
metricDataFormat
numberOfVMetrics
=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',
'advanceHeightMax' => 'S',
'minTopSideBearing' => 's',
'minBottomSideBearing' => 's',
'yMaxExtent' => 's',
'caretSlopeRise' => 's',
'caretSlopeRun' => 's',
'metricDataFormat' => '+10s',
'numberOfVMetrics' => '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->{'numberOfVMetrics'} = $self->{' PARENT'}{'vmtx'}->numMetrics || $self->{'numberOfVMetrics'};
$fh->print(TTF_Out_Fields($self, \%fields, 36));
$self;
}
=head2 $t->minsize()
Returns the minimum size this table can be. If it is smaller than this, then the table
must be bad and should be deleted or whatever.
=cut
sub minsize
{
return 36;
}
=head2 $t->update
Updates various parameters in the hhea table from the hmtx table, assuming
the C<hmtx> table is dirty.
=cut
sub update
{
my ($self) = @_;
my ($vmtx) = $self->{' PARENT'}{'vmtx'};
my ($glyphs);
my ($num);
my ($i, $maw, $mlsb, $mrsb, $mext, $aw, $lsb, $ext);
return undef unless ($self->SUPER::update);
return undef unless (defined $vmtx && defined $self->{' PARENT'}{'loca'});
$vmtx->read->update;
$self->{' PARENT'}{'loca'}->read->update;
$glyphs = $self->{' PARENT'}{'loca'}{'glyphs'};
$num = $self->{' PARENT'}{'maxp'}{'numGlyphs'};
for ($i = 0; $i < $num; $i++)
{
$aw = $vmtx->{'advance'}[$i];
$lsb = $vmtx->{'top'}[$i];
if (defined $glyphs->[$i])
{ $ext = $lsb + $glyphs->[$i]->read->{'yMax'} - $glyphs->[$i]{'yMin'}; }
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->{'advanceHeightMax'} = $maw;
$self->{'minTopSideBearing'} = $mlsb;
$self->{'minBottomSideBearing'} = $mrsb;
$self->{'yMaxExtent'} = $mext;
$self->{'numberOfVMetrics'} = $vmtx->numMetrics;
$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
|