5 use Data::Dump qw(dump);
7 # DG compression is documented in ZPL II Programming Guide Volume Two, page 71-72
9 my $compress = $ENV{COMPRESS} || 1;
11 my $pnm_file = shift @ARGV || die "usage: $0 print.pnm";
13 open(my $fh, '<', $pnm_file);
14 my $p4 = <$fh>; chomp $p4;
15 die "no P4 header in [$p4] from $pnm_file" unless $p4 eq 'P4';
16 my $size = <$fh>; chomp $size;
17 my ( $w, $h ) = split(/ /,$size,$2);
18 warn "WARNING: width of $pnm_file not 832 but $w !\n" if $w != 832;
23 print "^XA~TA000~JSN^LT18^MNW^MTD^PON^PMN^LH0,0^JMA^PR4,4^MD13^JUS^LRN^CI0^XZ";
25 printf "~DG000.GRF,%d,%d,\r\n", $w / 8 * $h, $w / 8;
31 my $repeat = length($compress);
33 while ( $repeat >= 400 ) {
37 if ( $repeat >= 20 ) {
38 $out .= chr( ord('f') + ( $repeat / 20 ) );
42 $out .= chr( ord('F') + $repeat );
44 $out .= substr($compress,0,1); # char
45 warn "## zpl_compress $repeat = $compress -> $out\n";
49 foreach my $y ( 0 .. $h - 1 ) {
50 my $line = substr( $bitmap, $y * ( $w / 8 ), $w / 8 );
51 if ( $line eq $last_line ) {
52 print ":" && warn "# $y repeat previous line\n";
54 my $hex = unpack('H*', $line);
57 $hex =~ s/0+$/,/ && warn "# $y fill 0 to right\n";
58 $hex =~ s/F+$/!/i && warn "# $y fill 1 to right\n";
59 $hex =~ s/((.)\2+)/zpl_compress($1)/egs;
65 print "^XA\r\n^MMT\r\n^LL0328\r\n^PW831\r\n^LS0\r\n^FT0,352^XG000.GRF,1,1^FS\r\n^PQ1,0,1,Y^XZ\r\n^XA^ID000.GRF^FS^XZ";