+++ /dev/null
-package Font::TTF::OldCmap;
-
-=head1 NAME
-
-Font::TTF::OldCmap - Character map table
-
-This module is deprecated
-
-=head1 DESCRIPTION
-
-Looks after the character map. The primary structure used for handling a cmap
-is the L<Font::TTF::Segarr> which handles the segmented arrays of format 4 tables,
-and in a simpler form for format 0 tables.
-
-Due to the complexity of working with segmented arrays, most of the handling of
-such arrays is via methods rather than via instance variables.
-
-One important feature of a format 4 table is that it always contains a segment
-with a final address of 0xFFFF. If you are creating a table from scratch this is
-important (although L<Font::TTF::Segarr> can work quite happily without it).
-
-
-=head1 INSTANCE VARIABLES
-
-The instance variables listed here are not preceeded by a space due to their
-emulating structural information in the font.
-
-=over 4
-
-=item Num
-
-Number of subtables in this table
-
-=item Tables
-
-An array of subtables ([0..Num-1])
-
-=back
-
-Each subtables also has its own instance variables which are, again, not
-preceeded by a space.
-
-=over 4
-
-=item Platform
-
-The platform number for this subtable
-
-=item Encoding
-
-The encoding number for this subtable
-
-=item Format
-
-Gives the stored format of this subtable
-
-=item Ver
-
-Gives the version (or language) information for this subtable
-
-=item val
-
-This points to a L<Font::TTF::Segarr> which contains the content of the particular
-subtable.
-
-=back
-
-=head1 METHODS
-
-=cut
-
-use strict;
-use vars qw(@ISA);
-require Font::TTF::Table;
-require Font::TTF::Segarr;
-
-@ISA = qw(Font::TTF::Table);
-
-
-=head2 $t->read
-
-Reads the cmap into memory. Format 4 subtables read the whole subtable and
-fill in the segmented array accordingly.
-
-Format 2 subtables are not read at all.
-
-=cut
-
-sub read
-{
- my ($self) = @_;
- my ($dat, $i, $j, $k, $id, @ids, $s);
- my ($start, $end, $range, $delta, $form, $len, $num, $ver);
- my ($fh) = $self->{' INFILE'};
-
- $self->SUPER::read or return $self;
- $fh->read($dat, 4);
- $self->{'Num'} = unpack("x2n", $dat);
- $self->{'Tables'} = [];
- for ($i = 0; $i < $self->{'Num'}; $i++)
- {
- $s = {};
- $fh->read($dat, 8);
- ($s->{'Platform'}, $s->{'Encoding'}, $s->{'LOC'}) = (unpack("nnN", $dat));
- $s->{'LOC'} += $self->{' OFFSET'};
- push(@{$self->{'Tables'}}, $s);
- }
- for ($i = 0; $i < $self->{'Num'}; $i++)
- {
- $s = $self->{'Tables'}[$i];
- $fh->seek($s->{'LOC'}, 0);
- $fh->read($dat, 6);
- ($form, $len, $ver) = (unpack("n3", $dat));
-
- $s->{'Format'} = $form;
- $s->{'Ver'} = $ver;
- if ($form == 0)
- {
- $s->{'val'} = Font::TTF::Segarr->new;
- $fh->read($dat, 256);
- $s->{'val'}->fastadd_segment(0, 2, unpack("C*", $dat));
- $s->{'Start'} = 0;
- $s->{'Num'} = 256;
- } elsif ($form == 6)
- {
- my ($start, $ecount);
-
- $fh->read($dat, 4);
- ($start, $ecount) = unpack("n2", $dat);
- $fh->read($dat, $ecount << 1);
- $s->{'val'} = Font::TTF::Segarr->new;
- $s->{'val'}->fastadd_segment($start, 2, unpack("n*", $dat));
- $s->{'Start'} = $start;
- $s->{'Num'} = $ecount;
- } elsif ($form == 2)
- {
-# no idea what to do here yet
- } elsif ($form == 4)
- {
- $fh->read($dat, 8);
- $num = unpack("n", $dat);
- $num >>= 1;
- $fh->read($dat, $len - 14);
- $s->{'val'} = Font::TTF::Segarr->new;
- for ($j = 0; $j < $num; $j++)
- {
- $end = unpack("n", substr($dat, $j << 1, 2));
- $start = unpack("n", substr($dat, ($j << 1) + ($num << 1) + 2, 2));
- $delta = unpack("n", substr($dat, ($j << 1) + ($num << 2) + 2, 2));
- $delta -= 65536 if $delta > 32767;
- $range = unpack("n", substr($dat, ($j << 1) + $num * 6 + 2, 2));
- @ids = ();
- for ($k = $start; $k <= $end; $k++)
- {
- if ($range == 0)
- { $id = $k + $delta; }
- else
- { $id = unpack("n", substr($dat, ($j << 1) + $num * 6 +
- 2 + ($k - $start) * 2 + $range, 2)) + $delta; }
- $id -= 65536 if $id > 65536;
- push (@ids, $id);
- }
- $s->{'val'}->fastadd_segment($start, 0, @ids);
- }
- $s->{'val'}->tidy;
- $s->{'Num'} = 0x10000; # always ends here
- $s->{'Start'} = $s->{'val'}[0]{'START'};
- }
- }
- $self;
-}
-
-
-=head2 $t->ms_lookup($uni)
-
-Given a Unicode value in the MS table (Platform 3, Encoding 1) locates that
-table and looks up the appropriate glyph number from it.
-
-=cut
-
-sub ms_lookup
-{
- my ($self, $uni) = @_;
-
- $self->find_ms || return undef unless (defined $self->{' mstable'});
- return $self->{' mstable'}{'val'}->at($uni);
-}
-
-
-=head2 $t->find_ms
-
-Finds the Microsoft Unicode table and sets the C<mstable> instance variable
-to it if found. Returns the table it finds.
-
-=cut
-sub find_ms
-{
- my ($self) = @_;
- my ($i, $s, $alt);
-
- return $self->{' mstable'} if defined $self->{' mstable'};
- $self->read;
- for ($i = 0; $i < $self->{'Num'}; $i++)
- {
- $s = $self->{'Tables'}[$i];
- if ($s->{'Platform'} == 3)
- {
- $self->{' mstable'} = $s;
- last if ($s->{'Encoding'} == 1);
- } elsif ($s->{'Platform'} == 0 || ($s->{'Platform'} == 2 && $s->{'Encoding'} == 1))
- { $self->{' mstable'} = $s; }
- }
- $self->{' mstable'};
-}
-
-
-=head2 $t->out($fh)
-
-Writes out a cmap table to a filehandle. If it has not been read, then
-just copies from input file to output
-
-=cut
-
-sub out
-{
- my ($self, $fh) = @_;
- my ($loc, $s, $i, $base_loc, $j);
-
- return $self->SUPER::out($fh) unless $self->{' read'};
-
- $base_loc = $fh->tell();
- $fh->print(pack("n2", 0, $self->{'Num'}));
-
- for ($i = 0; $i < $self->{'Num'}; $i++)
- { $fh->print(pack("nnN", $self->{'Tables'}[$i]{'Platform'}, $self->{'Tables'}[$i]{'Encoding'}, 0)); }
-
- for ($i = 0; $i < $self->{'Num'}; $i++)
- {
- $s = $self->{'Tables'}[$i];
- $s->{'val'}->tidy;
- $s->{' outloc'} = $fh->tell();
- $fh->print(pack("n3", $s->{'Format'}, 0, $s->{'Ver'})); # come back for length
- if ($s->{'Format'} == 0)
- {
- $fh->print(pack("C256", $s->{'val'}->at(0, 256)));
- } elsif ($s->{'Format'} == 6)
- {
- $fh->print(pack("n2", $s->{'Start'}, $s->{'Num'}));
- $fh->print(pack("n*", $s->{'val'}->at($s->{'Start'}, $s->{'Num'})));
- } elsif ($s->{'Format'} == 2)
- {
- } elsif ($s->{'Format'} == 4)
- {
- my ($num, $sRange, $eSel);
- my (@deltas, $delta, @range, $flat, $k, $segs, $count);
-
- $num = $#{$s->{'val'}} + 1;
- $segs = $s->{'val'};
- for ($sRange = 1, $eSel = 0; $sRange <= $num; $eSel++)
- { $sRange <<= 1;}
- $eSel--;
- $fh->print(pack("n4", $num * 2, $sRange, $eSel, ($num * 2) - $sRange));
- $fh->print(pack("n*", map {$_->{'START'} + $_->{'LEN'} - 1} @$segs));
- $fh->print(pack("n", 0));
- $fh->print(pack("n*", map {$_->{'START'}} @$segs));
-
- for ($j = 0; $j < $num; $j++)
- {
- $delta = $segs->[$j]{'VAL'}[0]; $flat = 1;
- for ($k = 1; $k < $segs->[$j]{'LEN'}; $k++)
- {
- if ($segs->[$j]{'VAL'}[$k] == 0)
- { $flat = 0; }
- if ($delta + $k != $segs->[$j]{'VAL'}[$k])
- {
- $delta = 0;
- last;
- }
- }
- push (@range, $flat);
- push (@deltas, ($delta ? $delta - $segs->[$j]{'START'} : 0));
- }
- $fh->print(pack("n*", @deltas));
-
- $count = 0;
- for ($j = 0; $j < $num; $j++)
- {
- $delta = $deltas[$j];
- if ($delta != 0 && $range[$j] == 1)
- { $range[$j] = 0; }
- else
- {
- $range[$j] = ($count + $num - $j) << 1;
- $count += $segs->[$j]{'LEN'};
- }
- }
-
- $fh->print(pack("n*", @range));
-
- for ($j = 0; $j < $num; $j++)
- {
- next if ($range[$j] == 0);
- for ($k = 0; $k < $segs->[$j]{'LEN'}; $k++)
- { $fh->print(pack("n", $segs->[$j]{'VAL'}[$k])); }
- }
- }
-
- $loc = $fh->tell();
- $fh->seek($s->{' outloc'} + 2, 0);
- $fh->print(pack("n", $loc - $s->{' outloc'}));
- $fh->seek($base_loc + 8 + ($i << 3), 0);
- $fh->print(pack("N", $s->{' outloc'} - $base_loc));
- $fh->seek($loc, 0);
- }
- $self;
-}
-
-
-=head2 @map = $t->reverse([$num])
-
-Returns a reverse map of the table of given number or the Microsoft
-cmap. I.e. given a glyph gives the Unicode value for it.
-
-=cut
-
-sub reverse
-{
- my ($self, $tnum) = @_;
- my ($table) = defined $tnum ? $self->{'Tables'}[$tnum] : $self->find_ms;
- my (@res, $i, $s, $first);
-
- foreach $s (@{$table->{'val'}})
- {
- $first = $s->{'START'};
- map {$res[$_] = $first unless $res[$_]; $first++;} @{$s->{'VAL'}};
- }
- @res;
-}
-
-1;
-
-=head1 BUGS
-
-=over 4
-
-=item *
-
-No support for format 2 tables (MBCS)
-
-=back
-
-=head1 AUTHOR
-
-Martin Hosken Martin_Hosken@sil.org. See L<Font::TTF::Font> for copyright and
-licensing.
-
-=cut
-
fnp / librarian.git / blobdiff