--- /dev/null
+package Font::TTF::Maxp;
+
+=head1 NAME
+
+Font::TTF::Maxp - Maximum Profile table in a font
+
+=head1 DESCRIPTION
+
+A collection of useful instance variables following the TTF standard. Probably
+the most used being C<numGlyphs>. Note that this particular value is
+foundational and should be kept up to date by the application, it is not updated
+by C<update>.
+
+Handles table versions 0.5, 1.0
+
+=head1 INSTANCE VARIABLES
+
+No others beyond those specified in the standard:
+
+ numGlyphs
+ maxPoints
+ maxContours
+ maxCompositePoints
+ maxCompositeContours
+ maxZones
+ maxTwilightPoints
+ maxStorage
+ maxFunctionDefs
+ maxInstructionDefs
+ maxStackElements
+ maxSizeOfInstructions
+ maxComponentElements
+ maxComponentDepth
+
+
+=head1 METHODS
+
+=cut
+
+use strict;
+use vars qw(@ISA %fields @field_info);
+use Font::TTF::Utils;
+
+@ISA = qw(Font::TTF::Table);
+@field_info = (
+ 'numGlyphs' => 'S',
+ 'maxPoints' => 'S',
+ 'maxContours' => 'S',
+ 'maxCompositePoints' => 'S',
+ 'maxCompositeContours' => 'S',
+ 'maxZones' => 'S',
+ 'maxTwilightPoints' => 'S',
+ 'maxStorage' => 'S',
+ 'maxFunctionDefs' => 'S',
+ 'maxInstructionDefs' => 'S',
+ 'maxStackElements' => 'S',
+ 'maxSizeOfInstructions' => 'S',
+ 'maxComponentElements' => 'S',
+ 'maxComponentDepth' => '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 $t->read
+
+Reads the table into memory
+
+=cut
+
+sub read
+{
+ my ($self) = @_;
+ my ($dat);
+
+ $self->SUPER::read or return $self;
+
+ init unless defined $fields{'numGlyphs'}; # any key would do
+ $self->{' INFILE'}->read($dat, 4);
+ $self->{'version'} = TTF_Unpack("v", $dat);
+
+ if ($self->{'version'} == 0.5)
+ {
+ $self->{' INFILE'}->read($dat, 2);
+ $self->{'numGlyphs'} = unpack("n", $dat);
+ } else
+ {
+ $self->{' INFILE'}->read($dat, 28);
+ 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'};
+ $fh->print(TTF_Pack("v", $self->{'version'}));
+
+ if ($self->{'version'} == 0.5)
+ { $fh->print(pack("n", $self->{'numGlyphs'})); }
+ else
+ { $fh->print(TTF_Out_Fields($self, \%fields, 28)); }
+ $self;
+}
+
+
+=head2 $t->update
+
+Calculates all the maximum values for a font based on the glyphs in the font.
+Only those fields which require hinting code interpretation are ignored and
+left as they were read.
+
+=cut
+
+sub update
+{
+ my ($self) = @_;
+ my ($i, $num, @n, @m, $j);
+ my (@name) = qw(maxPoints maxContours maxCompositePoints maxCompositeContours
+ maxSizeOfInstructions maxComponentElements maxComponentDepth);
+
+ return undef unless ($self->SUPER::update);
+ return undef if ($self->{'version'} == 0.5); # only got numGlyphs
+ return undef unless (defined $self->{' PARENT'}{'loca'});
+ $self->{' PARENT'}{'loca'}->update;
+ $num = $self->{'numGlyphs'};
+
+ for ($i = 0; $i < $num; $i++)
+ {
+ my ($g) = $self->{' PARENT'}{'loca'}{'glyphs'}[$i] || next;
+
+ @n = $g->maxInfo;
+
+ for ($j = 0; $j <= $#n; $j++)
+ { $m[$j] = $n[$j] if $n[$j] > $m[$j]; }
+ }
+
+ foreach ('prep', 'fpgm')
+ { $m[4] = length($self->{' PARENT'}{$_}{' dat'})
+ if (defined $self->{' PARENT'}{$_}
+ && length($self->{' PARENT'}{$_}{' dat'}) > $m[4]);
+ }
+
+ for ($j = 0; $j <= $#name; $j++)
+ { $self->{$name[$j]} = $m[$j]; }
+ $self;
+}
+1;
+
+
+=head1 BUGS
+
+None known
+
+=head1 AUTHOR
+
+Martin Hosken Martin_Hosken@sil.org. See L<Font::TTF::Font> for copyright and
+licensing.
+
+=cut