180 lines
3.5 KiB
Perl
180 lines
3.5 KiB
Perl
package Font::TTF::Prop;
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=head1 NAME
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Font::TTF::Prop - Glyph Properties table in a font
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=head1 DESCRIPTION
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=head1 INSTANCE VARIABLES
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=over
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=item version
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=item default
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=item lookup
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Hash of property values keyed by glyph number
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=item lookupFormat
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=back
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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 Font::TTF::Segarr;
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@ISA = qw(Font::TTF::Table);
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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) = @_;
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my ($dat, $fh);
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my ($version, $lookupPresent, $default);
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$self->SUPER::read or return $self;
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$fh = $self->{' INFILE'};
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$fh->read($dat, 8);
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($version, $lookupPresent, $default) = TTF_Unpack("vSS", $dat);
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if ($lookupPresent) {
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my ($format, $lookup) = AAT_read_lookup($fh, 2, $self->{' LENGTH'} - 8, $default);
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$self->{'lookup'} = $lookup;
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$self->{'format'} = $format;
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}
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$self->{'version'} = $version;
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$self->{'default'} = $default;
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$self;
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}
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=head2 $t->out($fh)
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Writes the table to a file either from memory or by copying
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=cut
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sub out
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{
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my ($self, $fh) = @_;
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my ($default, $lookup);
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return $self->SUPER::out($fh) unless $self->{' read'};
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$default = $self->{'default'};
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$lookup = $self->{'lookup'};
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$fh->print(TTF_Pack("vSS", $self->{'version'}, (defined $lookup ? 1 : 0), $default));
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AAT_write_lookup($fh, $self->{'format'}, $lookup, 2, $default) if (defined $lookup);
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}
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=head2 $t->minsize()
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Returns the minimum size this table can be. If it is smaller than this, then the table
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must be bad and should be deleted or whatever.
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=cut
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sub minsize
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{
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return 8;
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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, $fh) = @_;
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my ($lookup);
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$self->read;
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$fh = 'STDOUT' unless defined $fh;
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$fh->printf("version %f\ndefault %04x # %s\n", $self->{'version'}, $self->{'default'}, meaning_($self->{'default'}));
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$lookup = $self->{'lookup'};
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if (defined $lookup) {
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$fh->printf("format %d\n", $self->{'format'});
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foreach (sort { $a <=> $b } keys %$lookup) {
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$fh->printf("\t%d -> %04x # %s\n", $_, $lookup->{$_}, meaning_($lookup->{$_}));
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}
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}
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}
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sub meaning_
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{
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my ($val) = @_;
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my ($res);
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my @types = (
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"Strong left-to-right",
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"Strong right-to-left",
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"Arabic letter",
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"European number",
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"European number separator",
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"European number terminator",
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"Arabic number",
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"Common number separator",
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"Block separator",
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"Segment separator",
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"Whitespace",
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"Other neutral");
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$res = $types[$val & 0x001f] or ("Undefined [" . ($val & 0x001f) . "]");
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$res .= ", floater" if $val & 0x8000;
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$res .= ", hang left" if $val & 0x4000;
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$res .= ", hang right" if $val & 0x2000;
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$res .= ", attaches on right" if $val & 0x0080;
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$res .= ", pair" if $val & 0x1000;
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my $pairOffset = ($val & 0x0f00) >> 8;
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$pairOffset = $pairOffset - 16 if $pairOffset > 7;
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$res .= $pairOffset > 0 ? " +" . $pairOffset : $pairOffset < 0 ? " " . $pairOffset : "";
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$res;
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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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