package Font::TTF::Glyph;
=head1 NAME
Font::TTF::Glyph - Holds a information for a single glyph
=head1 DESCRIPTION
This is a single glyph description as held in a TT font. On creation only its
header is read. Thus you can get the bounding box of each glyph without having
to read all the other information.
=head1 INSTANCE VARIABLES
In addition to the named variables in a glyph header (C<xMin> etc.), there are
also all capital instance variables for holding working information, mostly
from the location table.
=head2 Variables for all glyphs:
The standard attributes each glyph has are:
=over 4
=item numberOfContours
For simple glyphs this will be the count of contours. For compound glyphs this will be -1.
=item xMin
=item yMin
=item xMax
=item yMax
These identify the bounding box of the glyph.
=back
There are also other, derived, instance variables for each glyph which are read
when the whole glyph is read (via C<read_dat>):
=over 4
=item instLen
Number of bytes in the hinting instructions (Warning this variable is deprecated,
use C<length($g->{'hints'})> instead).
=item hints
The string containing the hinting code for the glyph
=back
=head2 Variables for simple glyphs (numberOfContours E<gt>= 0):
=over 4
=item endPoints
An array of endpoints for each contour in the glyph. There are
C<numberOfContours> contours in a glyph. The number of points in a glyph is
equal to the highest endpoint of a contour.
=item numPoints
This is a generated value which contains the total number of points for this simple glyph.
=back
There are also a number of arrays indexed by point number:
=over 4
=item flags
The flags associated with reading this point. The flags for a point are
recalculated for a point when it is C<update>d. Thus the flags are not very
useful. The only important bit is bit 0 which indicates whether the point is
an 'on' curve point, or an 'off' curve point.
=item x
The absolute x co-ordinate of the point.
=item y
The absolute y co-ordinate of the point
=back
=head2 Variables for compound glyphs (numberOfContours == -1):
=over 4
=item metric
This holds the component number (not its glyph number) of the component from
which the metrics for this glyph should be taken.
=item comps
This is an array of hashes for each component. Each hash has a number of
elements:
=over 4
=item glyph
The glyph number of the glyph which comprises this component of the composite.
NOTE: In some badly generated fonts, C<glyph> may contain a numerical value
but that glyph might not actually exist in the font file. This could
occur in any glyph, but is particularly likely for glyphs that have
no strokes, such as SPACE, U+00A0 NO-BREAK SPACE, or
U+200B ZERO WIDTH SPACE.
=item args
An array of two arguments which may be an x, y co-ordinate or two attachment
points (one on the base glyph the other on the component). See flags for details.
=item flag
The flag for this component
=item scale
A 4 number array for component scaling. This allows stretching, rotating, etc.
Note that scaling applies to placement co-ordinates (rather than attachment points)
before locating rather than after.
=back
=item numPoints
This is a generated value which contains the number of components read in for this
compound glyph.
=back
=head2 Private instance variables:
=over 4
=item INFILE (P)
The input file form which to read any information
=item LOC (P)
Location relative to the start of the glyf table in the read file
=item BASE (P)
The location of the glyf table in the read file
=item LEN (P)
This is the number of bytes required by the glyph. It should be kept up to date
by calling the C<update> method whenever any of the glyph content changes.
=item OUTLOC (P)
Location relative to the start of the glyf table. This variable is only active
whilst the output process is going on. It is used to inform the location table
where the glyph is located, since the glyf table is output before the loca
table due to alphabetical ordering.
=item OUTLEN (P)
This indicates the length of the glyph data when it is output. This more
accurately reflects the internal memory form than the C<LEN> variable which
only reflects the read file length. The C<OUTLEN> variable is only set after
calling C<out> or C<out_dat>.
=back
=head2 Editing
If you want to edit a glyph in some way, then you should read_dat the glyph, then
make your changes and then update the glyph or set the $g->{' isDirty'} variable.
The application must ensure that the following instance variables are
correct, from which update will calculate the rest, including the bounding box
information.
numPoints
numberOfContours
endPoints
x, y, flags (only flags bit 0)
instLen
hints
For components, the numPoints, x, y, endPoints & flags are not required but
the following information is required for each component.
flag (bits 2, 10, 11, 12)
glyph
args
scale
metric (glyph instance variable)
=head1 METHODS
=cut
use strict;
use vars qw(%fields @field_info);
use Font::TTF::Utils;
use Font::TTF::Table;
@field_info = (
'numberOfContours' => 's',
'xMin' => 's',
'yMin' => 's',
'xMax' => 's',
'yMax' => 's');
sub init
{
my ($k, $v, $c, $i);
for ($i = 0; $i < $#field_info; $i += 2)
{
($k, $v, $c) = TTF_Init_Fields($field_info[$i], $c, $field_info[$i + 1]);
next unless defined $k && $k ne "";
$fields{$k} = $v;
}
}
=head1 Font::TTF::Glyph->new(%parms)
Creates a new glyph setting various instance variables
=cut
sub new
{
my ($class, %parms) = @_;
my ($self) = {};
my ($p);
bless $self, $class;
foreach $p (keys %parms)
{ $self->{" $p"} = $parms{$p}; }
init unless defined $fields{'xMin'};
$self;
}
=head2 $g->read
Reads the header component of the glyph (numberOfContours and bounding box) and also the
glyph content, but into a data field rather than breaking it down into
its constituent structures. Use read_dat for this.
=cut
sub read
{
my ($self) = @_;
my ($fh) = $self->{' INFILE'};
my ($dat);
return $self if (defined $self->{' read'} && $self->{' read'} > 0);
$self->{' read'} = 1;
$fh->seek($self->{' LOC'} + $self->{' BASE'}, 0);
$fh->read($dat, $self->{' LEN'});
TTF_Read_Fields($self, $self->{' DAT'} = $dat, \%fields);
$self;
}
=head2 $g->read_dat
Reads the contents of the glyph (components and curves, etc.) from the memory
store C<DAT> into structures within the object.
=cut
sub read_dat
{
my ($self) = @_;
my ($dat, $num, $max, $i, $flag, $len, $val, $val1, $fp);
return $self if (defined $self->{' read'} && $self->{' read'} > 1);
$self->read unless $self->{' read'};
$dat = $self->{' DAT'};
$fp = 10;
$num = $self->{'numberOfContours'};
if ($num > 0)
{
$self->{'endPoints'} = [unpack("n*", substr($dat, $fp, $num << 1))];
$fp += $num << 1;
$max = 0;
foreach (@{$self->{'endPoints'}})
{ $max = $_ if $_ > $max; }
# print STDERR join(",", unpack('C*', $self->{" DAT"}));
# printf STDERR ("(%d,%d in %d=%d @ %d)", scalar @{$self->{'endPoints'}}, $max, length($dat), $self->{' LEN'}, $fp);
$max++ if (@{$self->{'endPoints'}});
$self->{'numPoints'} = $max;
$self->{'instLen'} = unpack("n", substr($dat, $fp));
$self->{'hints'} = substr($dat, $fp + 2, $self->{'instLen'});
$fp += 2 + $self->{'instLen'};
# read the flags array
for ($i = 0; $i < $max; $i++)
{
$flag = unpack("C", substr($dat, $fp++));
$self->{'flags'}[$i] = $flag;
if ($flag & 8)
{
$len = unpack("C", substr($dat, $fp++));
while ($len-- > 0)
{
$i++;
$self->{'flags'}[$i] = $flag;
}
}
}
#read the x array
for ($i = 0; $i < $max; $i++)
{
$flag = $self->{'flags'}[$i];
if ($flag & 2)
{
$val = unpack("C", substr($dat, $fp++));
$val = -$val unless ($flag & 16);
} elsif ($flag & 16)
{ $val = 0; }
else
{
$val = TTF_Unpack("s", substr($dat, $fp));
$fp += 2;
}
$self->{'x'}[$i] = $i == 0 ? $val : $self->{'x'}[$i - 1] + $val;
}
#read the y array
for ($i = 0; $i < $max; $i++)
{
$flag = $self->{'flags'}[$i];
if ($flag & 4)
{
$val = unpack("C", substr($dat, $fp++));
$val = -$val unless ($flag & 32);
} elsif ($flag & 32)
{ $val = 0; }
else
{
$val = TTF_Unpack("s", substr($dat, $fp));
$fp += 2;
}
$self->{'y'}[$i] = $i == 0 ? $val : $self->{'y'}[$i - 1] + $val;
}
}
# compound glyph
elsif ($num < 0)
{
$flag = 1 << 5; # cheat to get the loop going
for ($i = 0; $flag & 32; $i++)
{
($flag, $self->{'comps'}[$i]{'glyph'}) = unpack("n2", substr($dat, $fp));
$fp += 4;
$self->{'comps'}[$i]{'flag'} = $flag;
if ($flag & 1) # ARGS1_AND_2_ARE_WORDS
{
$self->{'comps'}[$i]{'args'} = [TTF_Unpack("s2", substr($dat, $fp))];
$fp += 4;
} else
{
$self->{'comps'}[$i]{'args'} = [unpack("c2", substr($dat, $fp))];
$fp += 2;
}
if ($flag & 8)
{
$val = TTF_Unpack("F", substr($dat, $fp));
$fp += 2;
$self->{'comps'}[$i]{'scale'} = [$val, 0, 0, $val];
} elsif ($flag & 64)
{
($val, $val1) = TTF_Unpack("F2", substr($dat, $fp));
$fp += 4;
$self->{'comps'}[$i]{'scale'} = [$val, 0, 0, $val1];
} elsif ($flag & 128)
{
$self->{'comps'}[$i]{'scale'} = [TTF_Unpack("F4", substr($dat, $fp))];
$fp += 8;
}
$self->{'metric'} = $i if ($flag & 512);
}
$self->{'numPoints'} = $i;
if ($flag & 256) # HAVE_INSTRUCTIONS
{
$self->{'instLen'} = unpack("n", substr($dat, $fp));
$self->{'hints'} = substr($dat, $fp + 2, $self->{'instLen'});
$fp += 2 + $self->{'instLen'};
}
}
return undef if ($fp > length($dat));
$self->{' read'} = 2;
$self;
}
=head2 $g->out($fh)
Writes the glyph data to outfile
=cut
sub out
{
my ($self, $fh) = @_;
$self->read unless $self->{' read'};
$self->update if $self->{' isDirty'};
$fh->print($self->{' DAT'});
$self->{' OUTLEN'} = length($self->{' DAT'});
$self;
}
=head2 $g->out_xml($context, $depth)
Outputs an XML description of the glyph
=cut
sub out_xml
{
my ($self, $context, $depth) = @_;
my ($addr) = ($self =~ m/\((.+)\)$/o);
my ($k, $ndepth);
if ($context->{'addresses'}{$addr})
{
$context->{'fh'}->printf("%s<glyph gid='%s' id_ref='%s'/>\n", $depth, $context->{'gid'}, $context->{'addresses'}{$addr});
return $self;
}
else
{
$context->{'fh'}->printf("%s<glyph gid='%s'>\n", $depth, $context->{'gid'});
}
$ndepth = $depth . $context->{'indent'};
$self->read_dat;
foreach $k (sort grep {$_ !~ m/^\s/o} keys %{$self})
{
$self->XML_element($context, $ndepth, $k, $self->{$k});
}
$context->{'fh'}->print("$depth</glyph>\n");
delete $context->{'done_points'};
$self;
}
sub XML_element
{
my ($self, $context, $depth, $key, $val) = @_;
my ($fh) = $context->{'fh'};
my ($dind) = $depth . $context->{'indent'};
my ($i);
if ($self->{'numberOfContours'} >= 0 && ($key eq 'x' || $key eq 'y' || $key eq 'flags'))
{
return $self if ($context->{'done_points'});
$context->{'done_points'} = 1;
$fh->print("$depth<points>\n");
for ($i = 0; $i <= $#{$self->{'flags'}}; $i++)
{ $fh->printf("%s<point x='%s' y='%s' flags='0x%02X'/>\n", $dind,
$self->{'x'}[$i], $self->{'y'}[$i], $self->{'flags'}[$i]); }
$fh->print("$depth</points>\n");
}
elsif ($key eq 'hints')
{
my ($dat);
$fh->print("$depth<hints>\n");
# Font::TTF::Utils::XML_hexdump($context, $depth . $context->{'indent'}, $self->{'hints'});
$dat = Font::TTF::Utils::XML_binhint($self->{'hints'}) || "";
$dat =~ s/\n(?!$)/\n$depth$context->{'indent'}/mg;
$fh->print("$depth$context->{'indent'}$dat");
$fh->print("$depth</hints>\n");
}
else
{ return Font::TTF::Table::XML_element(@_); }
$self;
}
=head2 $g->dirty($val)
This sets the dirty flag to the given value or 1 if no given value. It returns the
value of the flag
=cut
sub dirty
{
my ($self, $val) = @_;
my ($res) = $self->{' isDirty'};
$self->{' isDirty'} = defined $val ? $val : 1;
$res;
}
=head2 $g->update
Generates a C<$self->{'DAT'}> from the internal structures, if the data has
been read into structures in the first place. If you are building a glyph
from scratch you will need to set the instance variable C<' isDirty'>.
=cut
sub update
{
my ($self) = @_;
my ($dat, $loc, $len, $flag, $x, $y, $i, $comp, $num, @rflags, $repeat);
return $self unless ($self->{' isDirty'});
$self->read_dat->update_bbox;
$self->{' DAT'} = TTF_Out_Fields($self, \%fields, 10);
$num = $self->{'numberOfContours'};
if ($num > 0)
{
$self->{' DAT'} .= pack("n*", @{$self->{'endPoints'}});
$len = $self->{'instLen'};
$self->{' DAT'} .= pack("n", $len);
$self->{' DAT'} .= pack("a" . $len, substr($self->{'hints'}, 0, $len)) if ($len > 0);
$repeat = 0;
for ($i = 0; $i < $self->{'numPoints'}; $i++)
{
$flag = $self->{'flags'}[$i] & 1;
if ($i == 0)
{
$x = $self->{'x'}[$i];
$y = $self->{'y'}[$i];
} else
{
$x = $self->{'x'}[$i] - $self->{'x'}[$i - 1];
$y = $self->{'y'}[$i] - $self->{'y'}[$i - 1];
}
$flag |= 16 if ($x == 0);
$flag |= 32 if ($y == 0);
if (($flag & 16) == 0 && $x < 256 && $x > -256)
{
$flag |= 2;
$flag |= 16 if ($x >= 0);
}
if (($flag & 32) == 0 && $y < 256 && $y > -256)
{
$flag |= 4;
$flag |= 32 if ($y >= 0);
}
if ($i > 0 && $rflags[-1] == $flag && $repeat < 255)
{
$repeat++;
} else
{
if ($repeat)
{
$rflags[-1] |= 8;
push @rflags, $repeat;
}
push @rflags, $flag;
$repeat = 0;
}
$self->{'flags'}[$i] = $flag;
}
# Add final repeat if needed, then pack up the flag bytes:
if ($repeat)
{
$rflags[-1] |= 8;
push @rflags, $repeat;
}
$self->{' DAT'} .= pack("C*", @rflags);
for ($i = 0; $i < $self->{'numPoints'}; $i++)
{
$flag = $self->{'flags'}[$i];
$x = $self->{'x'}[$i] - (($i == 0) ? 0 : $self->{'x'}[$i - 1]);
if (($flag & 18) == 0)
{ $self->{' DAT'} .= TTF_Pack("s", $x); }
elsif (($flag & 18) == 18)
{ $self->{' DAT'} .= pack("C", $x); }
elsif (($flag & 18) == 2)
{ $self->{' DAT'} .= pack("C", -$x); }
}
for ($i = 0; $i < $self->{'numPoints'}; $i++)
{
$flag = $self->{'flags'}[$i];
$y = $self->{'y'}[$i] - (($i == 0) ? 0 : $self->{'y'}[$i - 1]);
if (($flag & 36) == 0)
{ $self->{' DAT'} .= TTF_Pack("s", $y); }
elsif (($flag & 36) == 36)
{ $self->{' DAT'} .= pack("C", $y); }
elsif (($flag & 36) == 4)
{ $self->{' DAT'} .= pack("C", -$y); }
}
}
elsif ($num < 0)
{
for ($i = 0; $i <= $#{$self->{'comps'}}; $i++)
{
$comp = $self->{'comps'}[$i];
$flag = $comp->{'flag'} & 7158; # bits 2,10,11,12
$flag |= 1 unless ($comp->{'args'}[0] > -129 && $comp->{'args'}[0] < 128
&& $comp->{'args'}[1] > -129 && $comp->{'args'}[1] < 128);
if (defined $comp->{'scale'})
{
if ($comp->{'scale'}[1] == 0 && $comp->{'scale'}[2] == 0)
{
if ($comp->{'scale'}[0] == $comp->{'scale'}[3])
{ $flag |= 8 unless ($comp->{'scale'}[0] == 0
|| $comp->{'scale'}[0] == 1); }
else
{ $flag |= 64; }
} else
{ $flag |= 128; }
}
$flag |= 512 if (defined $self->{'metric'} && $self->{'metric'} == $i);
if ($i == $#{$self->{'comps'}})
{ $flag |= 256 if (defined $self->{'instLen'} && $self->{'instLen'} > 0); }
else
{ $flag |= 32; }
$self->{' DAT'} .= pack("n", $flag);
$self->{' DAT'} .= pack("n", $comp->{'glyph'});
$comp->{'flag'} = $flag;
if ($flag & 1)
{ $self->{' DAT'} .= TTF_Pack("s2", @{$comp->{'args'}}); }
else
{ $self->{' DAT'} .= pack("CC", @{$comp->{'args'}}); }
if ($flag & 8)
{ $self->{' DAT'} .= TTF_Pack("F", $comp->{'scale'}[0]); }
elsif ($flag & 64)
{ $self->{' DAT'} .= TTF_Pack("F2", $comp->{'scale'}[0], $comp->{'scale'}[3]); }
elsif ($flag & 128)
{ $self->{' DAT'} .= TTF_Pack("F4", @{$comp->{'scale'}}); }
}
if (defined $self->{'instLen'} && $self->{'instLen'} > 0)
{
$len = $self->{'instLen'};
$self->{' DAT'} .= pack("n", $len);
$self->{' DAT'} .= pack("a" . $len, substr($self->{'hints'}, 0, $len));
}
}
my ($olen) = length($self->{' DAT'});
$self->{' DAT'} .= ("\000") x (4 - ($olen & 3)) if ($olen & 3);
$self->{' OUTLEN'} = length($self->{' DAT'});
$self->{' read'} = 2; # changed from 1 to 2 so we don't read_dat() again
# we leave numPoints and instLen since maxp stats use this
$self;
}
=head2 $g->update_bbox
Updates the bounding box for this glyph according to the points in the glyph
=cut
sub update_bbox
{
my ($self) = @_;
my ($num, $maxx, $minx, $maxy, $miny, $i, $comp, $x, $y, $compg);
return $self unless (defined $self->{' read'} && $self->{' read'} > 1); # only if read_dat done
$miny = $minx = 65537; $maxx = $maxy = -65537;
$num = $self->{'numberOfContours'};
if ($num > 0)
{
for ($i = 0; $i < $self->{'numPoints'}; $i++)
{
($x, $y) = ($self->{'x'}[$i], $self->{'y'}[$i]);
$maxx = $x if ($x > $maxx);
$minx = $x if ($x < $minx);
$maxy = $y if ($y > $maxy);
$miny = $y if ($y < $miny);
}
}
elsif ($num < 0)
{
foreach $comp (@{$self->{'comps'}})
{
my ($gnx, $gny, $gxx, $gxy);
my ($sxx, $sxy, $syx, $syy);
my $otherg = $self->{' PARENT'}{'loca'}{'glyphs'}[$comp->{'glyph'}];
# work around bad fonts: see documentation for 'comps' above
next unless (defined $otherg);
$compg = $otherg->read->update_bbox;
($gnx, $gny, $gxx, $gxy) = @{$compg}{'xMin', 'yMin', 'xMax', 'yMax'};
if (defined $comp->{'scale'})
{
($sxx, $sxy, $syx, $syy) = @{$comp->{'scale'}};
($gnx, $gny, $gxx, $gxy) = ($gnx*$sxx+$gny*$syx + $comp->{'args'}[0],
$gnx*$sxy+$gny*$syy + $comp->{'args'}[1],
$gxx*$sxx+$gxy*$syx + $comp->{'args'}[0],
$gxx*$sxy+$gxy*$syy + $comp->{'args'}[1]);
} elsif ($comp->{'args'}[0] || $comp->{'args'}[1])
{
$gnx += $comp->{'args'}[0];
$gny += $comp->{'args'}[1];
$gxx += $comp->{'args'}[0];
$gxy += $comp->{'args'}[1];
}
($gnx, $gxx) = ($gxx, $gnx) if $gnx > $gxx;
($gny, $gxy) = ($gxy, $gny) if $gny > $gxy;
$maxx = $gxx if $gxx > $maxx;
$minx = $gnx if $gnx < $minx;
$maxy = $gxy if $gxy > $maxy;
$miny = $gny if $gny < $miny;
}
}
$self->{'xMax'} = $maxx;
$self->{'xMin'} = $minx;
$self->{'yMax'} = $maxy;
$self->{'yMin'} = $miny;
$self;
}
=head2 $g->maxInfo
Returns lots of information about a glyph so that the C<maxp> table can update
itself. Returns array containing contributions of this glyph to maxPoints, maxContours,
maxCompositePoints, maxCompositeContours, maxSizeOfInstructions, maxComponentElements,
and maxComponentDepth.
=cut
sub maxInfo
{
my ($self) = @_;
my (@res, $i, @n);
$self->read_dat; # make sure we've read some data
$res[4] = length($self->{'hints'}) if defined $self->{'hints'};
$res[6] = 1;
if ($self->{'numberOfContours'} > 0)
{
$res[0] = $self->{'numPoints'};
$res[1] = $self->{'numberOfContours'};
} elsif ($self->{'numberOfContours'} < 0)
{
for ($i = 0; $i <= $#{$self->{'comps'}}; $i++)
{
my $otherg =
$self->{' PARENT'}{'loca'}{'glyphs'}
[$self->{'comps'}[$i]{'glyph'}];
# work around bad fonts: see documentation for 'comps' above
next unless (defined $otherg );
@n = $otherg->maxInfo;
$res[2] += $n[2] == 0 ? $n[0] : $n[2];
$res[3] += $n[3] == 0 ? $n[1] : $n[3];
$res[5]++;
$res[6] = $n[6] + 1 if ($n[6] >= $res[6]);
}
}
@res;
}
=head2 $g->empty
Empties the glyph of all information to the level of not having been read.
Useful for saving memory in apps with many glyphs being read
=cut
sub empty
{
my ($self) = @_;
my (%keep) = map {(" $_" => 1)} ('LOC', 'OUTLOC', 'PARENT', 'INFILE', 'BASE',
'OUTLEN', 'LEN');
map {delete $self->{$_} unless $keep{$_}} keys %$self;
$self;
}
=head2 $g->get_points
This method creates point information for a compound glyph. The information is
stored in the same place as if the glyph was not a compound, but since
numberOfContours is negative, the glyph is still marked as being a compound
=cut
sub get_points
{
my ($self) = @_;
my ($comp, $compg, $nump, $e, $i);
$self->read_dat;
return undef unless ($self->{'numberOfContours'} < 0);
foreach $comp (@{$self->{'comps'}})
{
$compg = $self->{' PARENT'}{'loca'}{'glyphs'}[$comp->{'glyph'}];
# work around bad fonts: see documentation for 'comps' above
next unless (defined $compg );
$compg->get_points;
for ($i = 0; $i < $compg->{'numPoints'}; $i++)
{
my ($x, $y) = ($compg->{'x'}[$i], $compg->{'y'}[$i]);
if (defined $comp->{'scale'})
{
($x, $y) = ($x * $comp->{'scale'}[0] + $y * $comp->{'scale'}[2],
$x * $comp->{'scale'}[1] + $y * $comp->{'scale'}[3]);
}
if (defined $comp->{'args'})
{ ($x, $y) = ($x + $comp->{'args'}[0], $y + $comp->{'args'}[1]); }
push (@{$self->{'x'}}, $x);
push (@{$self->{'y'}}, $y);
push (@{$self->{'flags'}}, $compg->{'flags'}[$i]);
}
foreach $e (@{$compg->{'endPoints'}})
{ push (@{$self->{'endPoints'}}, $e + $nump); }
$nump += $compg->{'numPoints'};
}
$self->{'numPoints'} = $nump;
$self;
}
=head2 $g->get_refs
Returns an array of all the glyph ids that are used to make up this glyph. That
is all the compounds and their references and so on. If this glyph is not a
compound, then returns an empty array.
Please note the warning about bad fonts that reference nonexistent glyphs
under INSTANCE VARIABLES above. This function will not attempt to
filter out nonexistent glyph numbers.
=cut
sub get_refs
{
my ($self) = @_;
my (@res, $g);
$self->read_dat;
return unless ($self->{'numberOfContours'} < 0);
foreach $g (@{$self->{'comps'}})
{
push (@res, $g->{'glyph'});
my $otherg = $self->{' PARENT'}{'loca'}{'glyphs'}[$g->{'glyph'}];
# work around bad fonts: see documentation for 'comps' above
next unless (defined $otherg);
my @list = $otherg->get_refs;
push(@res, @list);
}
return @res;
}
1;
=head1 BUGS
=over 4
=item *
The instance variables used here are somewhat clunky and inconsistent with
the other tables.
=item *
C<update> doesn't re-calculate the bounding box or C<numberOfContours>.
=back
=head1 AUTHOR
Martin Hosken L<http://scripts.sil.org/FontUtils>.
=head1 LICENSING
Copyright (c) 1998-2016, SIL International (http://www.sil.org)
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