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Manual.pod	8.96 KB	-rw-r--r--
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Useall.pm	2.16 KB	-rw-r--r--
Utils.pm	18.51 KB	-rw-r--r--
Vhea.pm	3.57 KB	-rw-r--r--
Vmtx.pm	1.66 KB	-rw-r--r--
Win32.pm	1.08 KB	-rw-r--r--
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XMLparse.pm	5.49 KB	-rw-r--r--

Code Editor : Hdmx.pm

package Font::TTF::Hdmx;

=head1 NAME

Font::TTF::Hdmx - Horizontal device metrics

=head1 DESCRIPTION

The table consists of an hash of device metric tables indexed by the ppem for
that subtable. Each subtable consists of an array of advance widths in pixels
for each glyph at that ppem (horizontally).

=head1 INSTANCE VARIABLES

Individual metrics are accessed using the following referencing:

$f->{'hdmx'}{$ppem}[$glyph_num]

In addition there is one instance variable:

=over 4

=item Num

Number of device tables.

=back

=head2 METHODS

=cut

use strict;
use vars qw(@ISA);

@ISA = qw(Font::TTF::Table);

=head2 $t->read

Reads the table into data structures

=cut

sub read
{
    my ($self) = @_;
    $self->SUPER::read or return $self;

my ($fh) = $self->{' INFILE'};
    my ($numg, $ppem, $i, $numt, $dat, $len);

$numg = $self->{' PARENT'}{'maxp'}{'numGlyphs'};

$fh->read($dat, 8);
    ($self->{'Version'}, $numt, $len) = unpack("nnN", $dat);
    $self->{'Num'} = $numt;

for ($i = 0; $i < $numt; $i++)
    {
        $fh->read($dat, $len);
        $ppem = unpack("C", $dat);
        $self->{$ppem} = [unpack("C$numg", substr($dat, 2))];
    }
    $self;
}

=head2 $t->out($fh)

Outputs the device metrics for this font

=cut

sub out
{
    my ($self, $fh) = @_;
    my ($numg, $i, $pad, $len, $numt, @ppem, $max);

return $self->SUPER::out($fh) unless ($self->{' read'});

$numg = $self->{' PARENT'}{'maxp'}{'numGlyphs'};
    @ppem = grep(/^\d+$/, sort {$a <=> $b} keys %$self);
    $pad = "\000" x (3 - ($numg + 1) % 4);
    $len = $numg + 2 + length($pad);
    $fh->print(pack("nnN", 0, $#ppem + 1, $len));
    for $i (@ppem)
    {
        $max = 0;
        foreach (@{$self->{$i}}[0..($numg - 1)])
        { $max = $_ if $_ > $max; }
        $fh->print(pack("C*", $i, $max, @{$self->{$i}}[0..($numg - 1)]) . $pad);
    }
    $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 8;
}

=head2 $t->tables_do(&func)

For each subtable it calls &sub($ref, $ppem)

=cut

sub tables_do
{
    my ($self, $func) = @_;
    my ($i);

foreach $i (grep(/^\d+$/, %$self))
    { &$func($self->{$i}, $i); }
    $self;
}

=head2 $t->XML_element($context, $depth, $key, $value)

Outputs device metrics a little more tidily

=cut

sub XML_element
{
    my ($self) = shift;
    my ($context, $depth, $key, $value) = @_;
    my ($fh) = $context->{'fh'};
    my ($i);

return $self->SUPER::XML_element(@_) if (ref($value) ne 'ARRAY');
    $fh->print("$depth<metrics ppem='$key'>\n");
    for ($i = 0; $i <= $#{$value}; $i += 25)
    {
        $fh->print("$depth$context->{'indent'}". join(' ', @{$value}[$i .. $i + 24]) . "\n");
    }
    $fh->print("$depth</metrics>\n");
    $self;
}

=head1 BUGS

None known

=head1 AUTHOR

Martin Hosken L<http://scripts.sil.org/FontUtils>.

=head1 LICENSING

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

${this.title}

Code Editor : Hdmx.pm