use autodie;
use Data::Dump qw(dump);
+# DG compression is documented in ZPL II Programming Guide Volume Two, page 71-72
+
+my $compress = $ENV{COMPRESS} || 1;
+
my $pnm_file = shift @ARGV || die "usage: $0 print.pnm";
open(my $fh, '<', $pnm_file);
die "no P4 header in [$p4] from $pnm_file" unless $p4 eq 'P4';
my $size = <$fh>; chomp $size;
my ( $w, $h ) = split(/ /,$size,$2);
-warn "WARNING: width of $pnm_file not 832!\n" if $w != 832;
+warn "WARNING: width of $pnm_file not 832 but $w !\n" if $w != 832;
local $/ = undef;
my $bitmap = <$fh>;
printf "~DG000.GRF,%d,%d,\r\n", $w / 8 * $h, $w / 8;
+my $last_line = '';
+
+sub zpl_compress {
+ my $compress = shift;
+ my $repeat = length($compress);
+ my $out;
+ while ( $repeat >= 400 ) {
+ $out .= 'z';
+ $repeat -= 400;
+ }
+ if ( $repeat >= 20 ) {
+ $out .= chr( ord('f') + ( $repeat / 20 ) );
+ $repeat %= 20;
+ }
+ if ( $repeat > 0 ) {
+ $out .= chr( ord('F') + $repeat );
+ }
+ $out .= substr($compress,0,1); # char
+ warn "## zpl_compress $repeat = $compress -> $out\n";
+ return $out;
+}
+
foreach my $y ( 0 .. $h - 1 ) {
my $line = substr( $bitmap, $y * ( $w / 8 ), $w / 8 );
- print unpack('H*', $line);
+ if ( $line eq $last_line ) {
+ print ":" && warn "# $y repeat previous line\n";
+ } else {
+ my $hex = unpack('H*', $line);
+ if ( $compress ) {
+# $last_line = $line;
+ $hex =~ s/0+$/,/ && warn "# $y fill 0 to right\n";
+ $hex =~ s/F+$/!/i && warn "# $y fill 1 to right\n";
+ $hex =~ s/((.)\2+)/zpl_compress($1)/egs;
+ }
+ print $hex;
+ }
}
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";