/usr/share/gnuplot/pm3d/pm3dCompress.awk is in gnuplot-qt 4.6.4-2.
This file is owned by root:root, with mode 0o644.
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 | # pm3dCompress.awk - (c) Petr Mikulik; 1996/1997/1999/2002
#
# This awk script tries to compress a postscript file created by pm3d or
# gnuplot with pm3d splotting mode (limits: compresses only the first pm3d
# splot map there if in multiplot mode).
#
#
# Installation:
# Copy this file into a directory listed in your AWKPATH
# Running:
# awk -f pm3dCompress.awk _original_.ps >reduced.ps
#
# Hint: make a script file/abbreviation/alias, e.g. under VMS
# pm3dcompress:=="$disk:[dir]gawk.exe -f disk:[dir]pm3dCompress.awk"
#
# Note: use GNU awk whenever possible (HP awk does not have /dev/stderr, for
# instance).
#
#
# Strategy: this program browses the given .ps file and makes a list of all
# frequently used chains of postscript commands. If this list is not too large,
# then it replaces these chains by abbreviated commands.
# This may reduce the size of the postscript file about 50 %, which is not
# so bad if you want to store these files for a later use (and with the same
# functionality, of course).
#
#
# (c) Petr Mikulik, mikulik@physics.muni.cz, http://www.sci.muni.cz/~mikulik/
#
# Distribution policy: this file must be distributed together with the
# whole stuff of pm3d or gnuplot program.
#
# This is version: 2. 3. 2002
# 2. 3. 2002 - updated because of stroke in /g definition
# 15. 1. 1999 - new staff in pm3d and gnuplot/pm3d
# 9. 7. 1997 - update
# 16. 3. 1997 - first (?) version
#
BEGIN {
err = "/dev/stderr"
if (ARGC!=2) {
print "pm3dCompress.awk --- (c) Petr Mikulik, Brno. Version 2. 3. 2002" >err
print "Compression of pm3d .ps files. See the header of this file for more info." >err
print "Usage: awk -f pm3dCompress.awk inp_file.ps >out_file.ps" >err
exit(1)
}
getline
print "Please wait, it may take a while (input file "ARGV[1]" is read twice)." >err
while ($1!="%pm3d_map_begin")
if (getline<=0) {
print "No pm3d piece found in the input file, exiting." >err
exit(7) }
PrintMapping=$0
nList=0
while ($1!="%pm3d_map_end") {
if (getline<=0) {
print "Corrupted pm3d block---end not found, exiting." >err
exit(8) }
i=index($0,"N");
if (i>0) {
S=substr($0,i,length($0)) # M including
# is this string defined?
for (i=0; i<nList && List[i]!=S; i++);
if (i==nList) { # string is not in the list
List[i]=S; nList++;
if (nList>300) {
print "Defining more than 300 strings makes no sense, I think. Exiting, sorry." >err
exit(2) }
}
} # for all NR
}
print "List of frequent strings contains "nList" elements." >err
# now read the same file again the 3d part:
getline <ARGV[1]
while ($1!="%pm3d_map_begin") {
if ($1=="%%Creator:")
print $0", compressed by pm3dCompress.awk"
else if ($1=="/pmdict") {
$2+=nList; print }
else print
getline <ARGV[1]
}
# now print the list as a new definition
print "\t\t\t\t\t%pm3dCompress definitions"
for (i=0; i<nList; i++)
print "/X"i" {"List[i]"} def"
for (i=0; i<nList; i++) {
S=List[i]
sub("N ","2 index g N ",S)
print "/x"i" {"S"} def"
}
print "\n"PrintMapping"\n"
# now substitute the new definitions:
while ($1!="%pm3d_map_end") {
getline <ARGV[1]; i=index($0,"N");
if (i>0) {
S=substr($0,i,length($0)) # M including
# find the definition in the list
for (m=0; m<nList && List[m]!=S; m++);
S=substr($0,1,i-1)
if (index(S," g ")) {
gsub(" g "," ",S);
S=S"x"m
}
else
S=S"X"m
print S
}
else print
}
# read the rest of the file
flag = (getline <ARGV[1] );
while (flag>0) { print; flag = (getline <ARGV[1] ); }
close(ARGV[1])
}
# eof pm3dCompress.awk
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