+=item invoice_barcode DIR_OR_FALSE
+
+Generates an invoice barcode PNG. If DIR_OR_FALSE is a true value,
+it is taken as the temp directory where the PNG file will be generated and the
+PNG file name is returned. Otherwise, the PNG image itself is returned.
+
+=cut
+
+sub invoice_barcode {
+ my ($self, $dir) = (shift,shift);
+
+ my $gdbar = new GD::Barcode('Code39',$self->invnum);
+ die "can't create barcode: " . $GD::Barcode::errStr unless $gdbar;
+ my $gd = $gdbar->plot(Height => 30);
+
+ if($dir) {
+ my $bh = new File::Temp( TEMPLATE => 'barcode.'. $self->invnum. '.XXXXXXXX',
+ DIR => $dir,
+ SUFFIX => '.png',
+ UNLINK => 0,
+ ) or die "can't open temp file: $!\n";
+ print $bh $gd->png or die "cannot write barcode to file: $!\n";
+ my $png_file = $bh->filename;
+ close $bh;
+ return $png_file;
+ }
+ return $gd->png;
+}
+