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Woff	[ DIR ]	drwxr-xr-x
AATKern.pm	2.89 KB	-rw-r--r--
AATutils.pm	23.07 KB	-rw-r--r--
Anchor.pm	4.8 KB	-rw-r--r--
Bsln.pm	3.72 KB	-rw-r--r--
Changes_old.txt	2.17 KB	-rw-r--r--
Cmap.pm	23.91 KB	-rw-r--r--
Coverage.pm	8.38 KB	-rw-r--r--
Cvt_.pm	1.4 KB	-rw-r--r--
DSIG.pm	1.97 KB	-rw-r--r--
Delta.pm	3.39 KB	-rw-r--r--
Dumper.pm	2.56 KB	-rw-r--r--
EBDT.pm	7.16 KB	-rw-r--r--
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Fdsc.pm	2.18 KB	-rw-r--r--
Feat.pm	4.44 KB	-rw-r--r--
Fmtx.pm	1.96 KB	-rw-r--r--
Font.pm	29.07 KB	-rw-r--r--
Fpgm.pm	1.66 KB	-rw-r--r--
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Loca.pm	4.72 KB	-rw-r--r--
Manual.pod	8.96 KB	-rw-r--r--
Maxp.pm	4.17 KB	-rw-r--r--
Mort.pm	2.1 KB	-rw-r--r--
Name.pm	27.78 KB	-rw-r--r--
OS_2.pm	38.07 KB	-rw-r--r--
OTTags.pm	42.94 KB	-rw-r--r--
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PCLT.pm	2.49 KB	-rw-r--r--
PSNames.pm	132.77 KB	-rw-r--r--
Post.pm	9.53 KB	-rw-r--r--
Prep.pm	1.61 KB	-rw-r--r--
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Segarr.pm	9.53 KB	-rw-r--r--
Silf.pm	28.24 KB	-rw-r--r--
Sill.pm	3.2 KB	-rw-r--r--
Table.pm	11.15 KB	-rw-r--r--
Ttc.pm	3.87 KB	-rw-r--r--
Ttopen.pm	44.24 KB	-rw-r--r--
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--
Woff.pm	1.09 KB	-rw-r--r--
XMLparse.pm	5.49 KB	-rw-r--r--

Code Editor : Delta.pm

package Font::TTF::Delta;

=head1 NAME

Font::TTF::Delta - Opentype Device tables

=head1 DESCRIPTION

Each device table corresponds to a set of deltas for a particular point over
a range of ppem values.

=over

=item first

The first ppem value in the range

=item last

The last ppem value in the range

=item val

This is an array of deltas corresponding to each ppem in the range between
first and last inclusive.

=item fmt

This is the fmt used (log2 of number bits per value) when the device table was
read. It is recalculated on output.

=back

=head1 METHODS

=cut

use strict;
use Font::TTF::Utils;

=head2 new

Creates a new device table

=cut

sub new
{
    my ($class) = @_;
    my ($self) = {};

bless $self, $class;
}

=head2 read

Reads a device table from the given IO object at the current location

=cut

sub read
{
    my ($self, $fh) = @_;
    my ($dat, $fmt, $num, $i, $j, $mask);

$fh->read($dat, 6);
    ($self->{'first'}, $self->{'last'}, $fmt) = TTF_Unpack("S3", $dat);
    $self->{'fmt'} = $fmt;

$fmt = 1 << $fmt;
    $num = ((($self->{'last'} - $self->{'first'} + 1) * $fmt) + 15) >> 8;
    $fh->read($dat, $num);

$mask = (0xffff << (16 - $fmt)) & 0xffff;
    $j = 0;
    for ($i = $self->{'first'}; $i <= $self->{'last'}; $i++)
    {
        if ($j == 0)
        {
            $num = TTF_Unpack("S", substr($dat, 0, 2));
            substr($dat, 0, 2) = '';
        }
        push (@{$self->{'val'}}, ($num & $mask) >> (16 - $fmt));
        $num <<= $fmt;
        $j += $fmt;
        $j = 0 if ($j >= 16);
    }
    $self;
}

=head2 out($fh, $style)

Outputs a device table to the given IO object at the current location, or just
returns the data to be output if $style != 0

=cut

sub out
{
    my ($self, $fh, $style) = @_;
    my ($dat, $fmt, $num, $mask, $j, $f, $out);

foreach $f (@{$self->{'val'}})
    {
        my ($tfmt) = $f > 0 ? $f + 1 : -$f;
        $fmt = $tfmt if $tfmt > $fmt;
    }

if ($fmt > 8)
    { $fmt = 3; }
    elsif ($fmt > 2)
    { $fmt = 2; }
    else
    { $fmt = 1; }

$out = TTF_Pack("S3", $self->{'first'}, $self->{'last'}, $fmt);

$fmt = 1 << $fmt;
    $mask = 0xffff >> (16 - $fmt);
    $j = 0; $dat = 0;
    foreach $f (@{$self->{'val'}})
    {
        $dat |= ($f & $mask) << (16 - $fmt - $j);
        $j += $fmt;
        if ($j >= 16)
        {
            $j = 0;
            $out .= TTF_Pack("S", $dat);
            $dat = 0;
        }
    }
    $out .= pack('n', $dat) if ($j > 0);
    $fh->print($out) unless $style;
    $out;
}

=head2 $d->signature()

Returns a content based identifying string for this delta for
compression purposes

=cut

sub signature
{
    my ($self) = @_;
    return join (",", $self->{'first'}, $self->{'last'}, @{$self->{'val'}});
}

=head2 $d->out_xml($context)

Outputs a delta in XML

=cut

sub out_xml
{
    my ($self, $context, $depth) = @_;
    my ($fh) = $context->{'fh'};

$fh->printf("%s<delta first='%s' last='%s'>\n", $depth, $self->{'first'}, $self->{'last'});
    $fh->print("$depth$context->{'indent'}" . join (' ', @{$self->{'val'}}) . "\n") if defined ($self->{'val'});
    $fh->print("$depth</delta>\n");
}

=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 : Delta.pm