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
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
|
#!/bin/sh
##############################################################################
# This is essentially a Perl program. We exec the Perl interpreter specifying
# this same file as the Perl program and use the -x option to cause the Perl
# interpreter to skip down to the Perl code. The reason we do this instead of
# just making /usr/bin/perl the script interpreter (instead of /bin/sh) is
# that the user may have multiple Perl interpreters and the one he wants to
# use is properly located in the PATH. The user's choice of Perl interpreter
# may be crucial, such as when the user also has a PERL5LIB environment
# variable and it selects modules that work with only a certain main
# interpreter program.
#
# An alternative some people use is to have /usr/bin/env as the script
# interpreter. We don't do that because we think the existence and
# compatibility of /bin/sh is more reliable.
#
# Note that we aren't concerned about efficiency because the user who needs
# high efficiency can use directly the programs that this program invokes.
#
##############################################################################
exec perl -w -x -S -- "$0" "$@"
#!/usr/bin/perl
##############################################################################
# pnmquantall
##############################################################################
#
# HISTORY:
#
# This was in the original 1989 Pbmplus as a C shell program. In Netpbm 9.13
# (April 2001), it was converted to Bash. (Actually, it was thought to be
# Bourne shell, but it used arrays). In Netpbm 10.58 (March 2012), it was
# converted to Perl for better portability.
#
# The 2012 Perl conversion also changed the name from Ppmquantall to
# Pnmquantall. It had already handled non-PPM input files for many years.
#
# The original program was more complex: Because in those days Pnmcolormap
# and Pnmremap did not exist, Ppmquantall concatenated all the input images
# together and ran Ppmquant (later Pnmquant) on the combination. It then
# split the combination image apart to make one output image per input image.
# Today, Pnmquant is just a combination of Pnmcolormap and Pnmremap, and
# we are able to use them better separately in Ppmquantall: We still make
# the combination image, but use it only to compute the colormap with
# Pnmcolormap. We then apply that colormap separately to each input image
# to produce an output image.
#
# Bryan Henderson wrote the current version from scratch in March 2012
# and contributed it to the public domain.
#
##############################################################################
use strict;
use warnings;
use English;
use Fcntl; # gets open flags
use File::Copy;
my $TRUE=1; my $FALSE = 0;
sub parseArgs($$$$) {
my ($argvR, $extR, $newColorCtR, $fileNamesR) = @_;
my @argv = @{$argvR};
my $firstArgPos;
if (@argv > 0 && $argv[0] eq "-ext") {
if (@argv < 2) {
print STDERR ("-ext requires a value\n");
exit(100);
} else {
$$extR = $argv[1];
$firstArgPos = 2;
}
} else {
$$extR = "";
$firstArgPos = 0;
}
if (@argv < $firstArgPos + 2) {
print STDERR ("Not enough arguments. You need at least the number " .
"of colors and one file name\n");
exit(100);
}
$$newColorCtR = $argv[$firstArgPos];
@{$fileNamesR} = @argv[$firstArgPos + 1 .. @argv-1];
}
sub tempFile($) {
# We trust Perl's File::Temp to do a better job of creating the temp
# file, but it doesn't exist before Perl 5.6.1.
if (eval { require File::Temp; 1 }) {
return File::Temp::tempfile("pnmquant_XXXX",
SUFFIX=>".pnm",
DIR=>File::Spec->tmpdir(),
UNLINK=>$TRUE);
} else {
my ($suffix) = @_;
my $fileName;
local *file; # For some inexplicable reason, must be local, not my
my $i;
$i = 0;
do {
$fileName = File::Spec->tmpdir() . "/pnmquant_" . $i++ . $suffix;
} until sysopen(*file, $fileName, O_RDWR|O_CREAT|O_EXCL);
return(*file, $fileName);
}
}
sub makeColorMap($$$$) {
my ($fileNamesR, $newColorCt, $colorMapFileName, $errorR) = @_;
my $pnmcatCmd = "pnmcat -topbottom -white -jleft @{$fileNamesR}";
my $pnmcolormapCmd = "pnmcolormap $newColorCt";
my $makeMapCmd = "$pnmcatCmd | $pnmcolormapCmd >$colorMapFileName";
my $termStatus = system($makeMapCmd);
if ($termStatus != 0) {
$$errorR =
"Shell command to create the color map failed: '$makeMapCmd'.";
}
}
sub remapFiles($$$$) {
my ($fileNamesR, $colorMapFileName, $ext, $errorR) = @_;
my ($outputFh, $outputFileName) = tempFile("pnm");
if (!defined($outputFh)) {
$$errorR = "Unable to create temporary file. Errno=$ERRNO";
} else {
for (my $i = 0; $i < @{$fileNamesR} && !$$errorR; ++$i) {
my $inFileName = $fileNamesR->[$i];
my $pnmremapCmd =
"pnmremap '$inFileName' -mapfile=$colorMapFileName " .
">$outputFileName";
my $pnmremapTermStatus = system($pnmremapCmd);
if ($pnmremapTermStatus != 0) {
$errorR =
"Shell command to quantize '$inFileName' failed: " .
"'$pnmremapCmd'";
} else {
my $newFileName = $inFileName . $ext;
unlink($newFileName);
File::Copy::move($outputFileName, $newFileName)
or $errorR = "Rename to '$newFileName' failed.";
}
}
unlink($outputFileName); # In case something failed
}
}
###############################################################################
# MAINLINE
###############################################################################
my $progError;
parseArgs(\@ARGV, \my $ext, \my $newColorCt, \my @fileNames);
my ($colorMapFh, $colorMapFileName) = tempFile("pnm");
if (!defined($colorMapFh)) {
$progError = "Unable to create temporary file. Errno=$ERRNO";
}
if (!$progError) {
makeColorMap(\@fileNames, $newColorCt, $colorMapFileName, \$progError);
}
print ("got color map\n");
if (!$progError) {
remapFiles(\@fileNames, $colorMapFileName, $ext, \$progError);
}
my $exitStatus;
if ($progError) {
print STDERR ("Failed. $progError\n");
$exitStatus = 1;
} else {
$exitStatus = 0;
}
unlink($colorMapFileName);
exit($exitStatus);
|
