/usr/bin/pnmquant is in netpbm 2:10.0-15ubuntu2.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 | #!/usr/bin/perl -w
# Written by Bryan Henderson
# Contributed to the public domain.
use strict;
use English;
use Getopt::Long;
use File::Temp "tempfile";
use File::Spec;
use File::Copy;
use Fcntl ":seek";
my ($TRUE, $FALSE) = (1,0);
my ($opt_center, $opt_meancolor, $opt_meanpixel, $opt_floyd,
$opt_spreadbrightness, $opt_spreadluminosity, $opt_mapfile);
my $result = GetOptions(
"center" => \$opt_center,
"meancolor" => \$opt_meancolor,
"meanpixel" => \$opt_meanpixel,
"spreadbrightness" => \$opt_spreadbrightness,
"spreadluminosity" => \$opt_spreadluminosity,
"floyd|fs!" => \$opt_floyd,
);
if (@ARGV > 2) {
print(STDERR "This program takes at most 2 arguments. You specified ",
0+@ARGV, "\n");
exit(1);
}
if (@ARGV < 1) {
print(STDERR "You must specify the number of colors as an argument.\n");
exit(1);
}
my $infile;
my $ncolors = $ARGV[0];
if (@ARGV > 1) {
$infile = $ARGV[1];
} else {
$infile = "-";
}
my $averageOpt;
if (defined($opt_meanpixel)) {
$averageOpt = "-meanpixel";
} elsif (defined($opt_meancolor)) {
$averageOpt = "-meancolor";
} else {
$averageOpt = "-center";
}
my $spreadOpt;
if (defined($opt_spreadluminosity)) {
$spreadOpt = "-spreadluminosity";
} else {
$spreadOpt = "-spreadbrightness";
}
my ($mapfileFh, $mapfileSpec) = tempfile("pnmquantMapXXXX",
SUFFIX => ".pnm",
UNLINK => $TRUE,
DIR => File::Spec->tmpdir());
# We'd like just to connect the file handle $mapfileFh to STDOUT, but
# we can't figure out the Perl incantation to make that happen.
# close($mapfileFh);
open(OLDOUT, ">&STDOUT");
select(OLDOUT); # avoids Perl bug where it says we never use STDOUT
open(STDOUT, ">", $mapfileSpec);
&inputSTDIN($infile);
my $maprc = system("pnmcolormap", $ncolors, $averageOpt, $spreadOpt);
open(STDOUT, ">&OLDOUT");
seek(STDIN, 0, SEEK_SET);
if ($maprc != 0) {
print(STDERR "pnmcolormap failed, rc=$maprc\n");
exit(1);
} else {
my $floydOpt = $opt_floyd ? "-floyd" : "-nofloyd";
my $remaprc = system("pnmremap",
"-mapfile=$mapfileSpec", $floydOpt);
if ($remaprc != 0) {
print(STDERR "pnmremap failed, rc=$remaprc\n");
exit(1);
}
}
sub inputSTDIN {
my $inputfile = shift;
if ($inputfile eq "-") {
unless (seek(STDIN, 0, SEEK_SET)) {
my ($fileFh, $fileSpec) = tempfile("pnmquantSTDINXXXX",
SUFFIX => ".pnm",
UNLINK => $TRUE,
DIR => File::Spec->tmpdir());
while (<STDIN>) {
print($fileFh $_);
}
unless (seek($fileFh, 0, SEEK_SET)) {
print(STDERR "pnmquant failed, seek of temporary input file failed! Errno = $ERRNO\n");
exit(1);
}
*FILEFH = *$fileFh;
open(STDIN, "<&FILEFH");
tell(FILEFH);
}
}
else {
unless (open(STDIN, "<", $inputfile)) {
print(STDERR "pnmremap failed, can't open $inputfile: $!\n");
exit(1);
}
}
}
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