зеркало из https://github.com/mozilla/pjs.git
77 строки
2.0 KiB
Perl
Executable File
77 строки
2.0 KiB
Perl
Executable File
#!/usr/local/bin/perl
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#
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# The contents of this file are subject to the Netscape Public License
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# Version 1.0 (the "NPL"); you may not use this file except in
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# compliance with the NPL. You may obtain a copy of the NPL at
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# http://www.mozilla.org/NPL/
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#
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# Software distributed under the NPL is distributed on an "AS IS" basis,
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# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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# for the specific language governing rights and limitations under the
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# NPL.
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#
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# The Initial Developer of this code under the NPL is Netscape
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# Communications Corporation. Portions created by Netscape are
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# Copyright (C) 1998 Netscape Communications Corporation. All Rights
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# Reserved.
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# reducePalette
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# Steve Lamm <slamm@netscape.com>
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#
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# Streamline colormap usage by re-aligning colors
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# that are close to one another.
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#
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# This requires the netpbm image utilities.
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#
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# Usage: reducePalette <image1> [<image2> ..]
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#
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foreach $giffile ( @ARGV ) {
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if ($#ARGV > 0) {
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print STDERR "$0: reducing $giffile\n";
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}
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($dirpart, $filebase) = $giffile =~ m|(.*/)([^/]*).gif$|;
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$tempppm = "${dirpart}tmp$$.$filebase.ppm";
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$tempgif = "${dirpart}tmp$$.$filebase.gif";
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$temptrans = "${dirpart}tmp$$.$filebase.trans.gif";
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system("giftopnm < $giffile > $tempppm");
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if ($? != 0) {
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unlink $tempppm;
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exit 0;
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}
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system("ppmtogif < $tempppm > $tempgif");
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unlink $tempppm;
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if ($? != 0) {
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unlink $tempgif;
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exit 0;
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}
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system("giftrans -t\"#ff00ff\" -g \"#7F7F7F=#808080\"< $tempgif > $temptrans");
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unlink $tempgif;
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if ($? != 0) {
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unlink $temptrans;
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exit 0;
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} else {
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open(diff,"diff $temptrans $giffile |")
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|| die "Unable to diff file $temptrans and $giffile";
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$foundDiff = 0;
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while (<diff>) {
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$foundDiff = 1;
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}
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if ($foundDiff) {
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rename($temptrans, $giffile)
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|| die "Unable to rename $temptrans to $giffile";
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} else {
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print STDERR "$0: $giffile already reduced, left unchanged\n";
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unlink $temptrans;
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}
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}
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1;
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}
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