Viewing file: ppmrainbow (1.55 KB) -rwxr-xr-x Select action/file-type: (+) | (+) | (+) | Code (+) | Session (+) | (+) | SDB (+) | (+) | (+) | (+) | (+) | (+) |
#!/usr/bin/perl -wl use strict; use Getopt::Long;
my ($FALSE, $TRUE) = (0,1);
(my $myname = $0) =~ s#\A.*/##;
my ($Twid, $Thgt, $tmpdir, $norepeat, $verbose);
# set defaults $Twid = 600; $Thgt = 8; $tmpdir = $ENV{"TMPDIR"} || "/tmp"; $norepeat = $FALSE; $verbose = $FALSE;
GetOptions("width=i" => \$Twid, "height=i" => \$Thgt, "tmpdir=s" => \$tmpdir, "norepeat!" => \$norepeat, "verbose!" => \$verbose);
$! = 1; die "invalid width and/or height\n" unless $Twid >= 1 && $Thgt >= 1;
my $verboseCommand = $verbose ? "set -x;" : "";
if (@ARGV < 1) { die("You must specify at least one color as an argument\n"); } elsif (@ARGV < 2 && $norepeat) { die("With the -norepeat option, you must specify at least two colors " . "as arguments.\n"); }
my @colorlist;
@colorlist = @ARGV; if (!$norepeat) { push @colorlist, $ARGV[0]; }
my $tmpprefix = $tmpdir . "/$myname.$$.";
my $widthRemaining; my $n; my @outlist;
$n = 0; $widthRemaining = $Twid; @outlist = ();
while (@colorlist >= 2) { my $outfile = sprintf("%s%03u.ppm", $tmpprefix, $n); push(@outlist, $outfile);
my $w = int(($widthRemaining-1)/(@colorlist-1))+1; my $rc = system("$verboseCommand pgmramp -lr $w $Thgt | " . "pgmtoppm \"$colorlist[0]-$colorlist[1]\" >$outfile"); if ($rc != 0) { die("pgmramp|pgmtoppm failed.\n"); } $widthRemaining -= $w; $n++; shift @colorlist; }
0 == system qq{$verboseCommand pnmcat -lr @outlist} or exit 1;
exit 0;
END { unlink @outlist if @outlist; }
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