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package Imager::Font::Type1;
use strict;
use Imager::Color;
use vars qw(@ISA $VERSION);
@ISA = qw(Imager::Font);
$VERSION = "1.011";
*_first = \&Imager::Font::_first;
my $t1aa;
# $T1AA is in there because for some reason (probably cache related) antialiasing
# is a system wide setting in t1 lib.
sub t1_set_aa_level {
if (!defined $t1aa or $_[0] != $t1aa) {
Imager::i_t1_set_aa($_[0]);
$t1aa=$_[0];
}
}
sub new {
my $class = shift;
my %hsh=(color=>Imager::Color->new(255,0,0,0),
size=>15,
@_);
unless ($hsh{file}) {
$Imager::ERRSTR = "No font file specified";
return;
}
unless (-e $hsh{file}) {
$Imager::ERRSTR = "Font file $hsh{file} not found";
return;
}
unless ($Imager::formats{t1}) {
$Imager::ERRSTR = "Type 1 fonts not supported in this build";
return;
}
unless ($hsh{file} =~ m!^/! || $hsh{file} =~ m!^\./!) {
$hsh{file} = './' . $hsh{file};
}
if($hsh{afm}) {
unless (-e $hsh{afm}) {
$Imager::ERRSTR = "Afm file $hsh{afm} not found";
return;
}
unless ($hsh{afm} =~ m!^/! || $hsh{afm} =~ m!^\./!) {
$hsh{file} = './' . $hsh{file};
}
} else {
$hsh{afm} = 0;
}
my $id = Imager::i_t1_new($hsh{file},$hsh{afm});
unless ($id >= 0) { # the low-level code may miss some error handling
$Imager::ERRSTR = "Could not load font ($id)";
return;
}
return bless {
id => $id,
aa => $hsh{aa} || 0,
file => $hsh{file},
type => 't1',
size => $hsh{size},
color => $hsh{color},
}, $class;
}
sub _draw {
my $self = shift;
my %input = @_;
t1_set_aa_level($input{aa});
my $flags = '';
$flags .= 'u' if $input{underline};
$flags .= 's' if $input{strikethrough};
$flags .= 'o' if $input{overline};
if (exists $input{channel}) {
Imager::i_t1_cp($input{image}{IMG}, $input{'x'}, $input{'y'},
$input{channel}, $self->{id}, $input{size},
$input{string}, length($input{string}), $input{align},
$input{utf8}, $flags);
} else {
Imager::i_t1_text($input{image}{IMG}, $input{'x'}, $input{'y'},
$input{color}, $self->{id}, $input{size},
$input{string}, length($input{string}),
$input{align}, $input{utf8}, $flags);
}
return $self;
}
sub _bounding_box {
my $self = shift;
my %input = @_;
my $flags = '';
$flags .= 'u' if $input{underline};
$flags .= 's' if $input{strikethrough};
$flags .= 'o' if $input{overline};
return Imager::i_t1_bbox($self->{id}, $input{size}, $input{string},
length($input{string}), $input{utf8}, $flags);
}
# check if the font has the characters in the given string
sub has_chars {
my ($self, %hsh) = @_;
unless (defined $hsh{string} && length $hsh{string}) {
$Imager::ERRSTR = "No string supplied to \$font->has_chars()";
return;
}
return Imager::i_t1_has_chars($self->{id}, $hsh{string},
_first($hsh{'utf8'}, $self->{utf8}, 0));
}
sub utf8 {
1;
}
sub face_name {
my ($self) = @_;
Imager::i_t1_face_name($self->{id});
}
sub glyph_names {
my ($self, %input) = @_;
my $string = $input{string};
defined $string
or return Imager->_set_error("no string parameter passed to glyph_names");
my $utf8 = _first($input{utf8} || 0);
Imager::i_t1_glyph_name($self->{id}, $string, $utf8);
}
1;
__END__
=head1 NAME
Imager::Font::Type1 - low-level functions for Type1 fonts
=head1 DESCRIPTION
Imager::Font creates a Imager::Font::Type1 object when asked to create
a font object based on a C<.pfb> file.
See Imager::Font to see how to use this type.
This class provides low-level functions that require the caller to
perform data validation
By default Imager no longer creates the F<t1lib.log> log file. You
can re-enable that by calling Imager::init() with the C<t1log> option:
Imager::init(t1log=>1);
This must be called before creating any fonts.
Currently specific to Imager::Font::Type1, you can use the following
flags when drawing text or calculating a bounding box:
=for stopwords overline strikethrough
=over
=item *
C<underline> - Draw the text with an underline.
=item *
C<overline> - Draw the text with an overline.
=item *
C<strikethrough> - Draw the text with a strikethrough.
=back
Obviously, if you're calculating the bounding box the size of the line
is included in the box, and the line isn't drawn :)
=head1 AUTHOR
Addi, Tony
=cut
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