164 lines
3.2 KiB
Perl
164 lines
3.2 KiB
Perl
package Font::TTF::Kern::ClassArray;
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=head1 NAME
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Font::TTF::Kern::ClassArray - ClassArray Kern Subtable for AAT
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=head1 METHODS
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=cut
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use strict;
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use vars qw(@ISA);
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use Font::TTF::Utils;
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use Font::TTF::AATutils;
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use IO::File;
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@ISA = qw(Font::TTF::Kern::Subtable);
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sub new
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{
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my ($class) = @_;
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my ($self) = {};
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$class = ref($class) || $class;
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bless $self, $class;
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}
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=head2 $t->read
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Reads the table into memory
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=cut
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sub read
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{
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my ($self, $fh) = @_;
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my $subtableStart = $fh->tell() - 8;
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my $dat;
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$fh->read($dat, 8);
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my ($rowWidth, $leftClassTable, $rightClassTable, $array) = unpack("nnnn", $dat);
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$fh->seek($subtableStart + $leftClassTable, IO::File::SEEK_SET);
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$fh->read($dat, 4);
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my ($firstGlyph, $nGlyphs) = unpack("nn", $dat);
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$fh->read($dat, $nGlyphs * 2);
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my $leftClasses = [];
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foreach (TTF_Unpack("S*", $dat)) {
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push @{$leftClasses->[($_ - $array) / $rowWidth]}, $firstGlyph++;
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}
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$fh->seek($subtableStart + $rightClassTable, IO::File::SEEK_SET);
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$fh->read($dat, 4);
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($firstGlyph, $nGlyphs) = unpack("nn", $dat);
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$fh->read($dat, $nGlyphs * 2);
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my $rightClasses = [];
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foreach (TTF_Unpack("S*", $dat)) {
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push @{$rightClasses->[$_ / 2]}, $firstGlyph++;
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}
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$fh->seek($subtableStart + $array, IO::File::SEEK_SET);
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$fh->read($dat, $self->{'length'} - $array);
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my $offset = 0;
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my $kernArray = [];
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while ($offset < length($dat)) {
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push @$kernArray, [ TTF_Unpack("s*", substr($dat, $offset, $rowWidth)) ];
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$offset += $rowWidth;
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}
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$self->{'leftClasses'} = $leftClasses;
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$self->{'rightClasses'} = $rightClasses;
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$self->{'kernArray'} = $kernArray;
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$fh->seek($subtableStart + $self->{'length'}, IO::File::SEEK_SET);
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$self;
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}
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=head2 $t->out_sub($fh)
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Writes the table to a file
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=cut
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sub out_sub
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{
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}
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=head2 $t->print($fh)
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Prints a human-readable representation of the table
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=cut
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sub print
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{
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my ($self, $fh) = @_;
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my $post = $self->post();
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$fh = 'STDOUT' unless defined $fh;
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}
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sub dumpXML
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{
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my ($self, $fh) = @_;
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my $post = $self->post();
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$fh = 'STDOUT' unless defined $fh;
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$fh->printf("<leftClasses>\n");
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$self->dumpClasses($self->{'leftClasses'}, $fh);
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$fh->printf("</leftClasses>\n");
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$fh->printf("<rightClasses>\n");
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$self->dumpClasses($self->{'rightClasses'}, $fh);
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$fh->printf("</rightClasses>\n");
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$fh->printf("<kernArray>\n");
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my $kernArray = $self->{'kernArray'};
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foreach (0 .. $#$kernArray) {
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$fh->printf("<row index=\"%s\">\n", $_);
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my $row = $kernArray->[$_];
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foreach (0 .. $#$row) {
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$fh->printf("<val index=\"%s\" v=\"%s\"/>\n", $_, $row->[$_]);
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}
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$fh->printf("</row>\n");
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}
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$fh->printf("</kernArray>\n");
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}
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sub type
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{
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return 'kernClassArray';
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}
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1;
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=head1 BUGS
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None known
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=head1 AUTHOR
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Jonathan Kew L<http://scripts.sil.org/FontUtils>.
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=head1 LICENSING
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Copyright (c) 1998-2016, SIL International (http://www.sil.org)
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This module is released under the terms of the Artistic License 2.0.
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For details, see the full text of the license in the file LICENSE.
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=cut
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