| Current File : //usr/bin/ppmfade |
#!/usr/bin/perl -w
#-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
#
# This program creates a fade (a sequence of frames) between two images.
#
# Author: Wesley C. Barris
# AHPCRC
# Minnesota Supercomputer Center, Inc.
# Date: January 7, 1994
#
# Converted to perl and renamed from pbmfade to ppmfade by Bryan Henderson
# on March 31, 2000 for inclusion in Netpbm. Also, superfluous ability to
# process other formats removed.
#
# Copyright @ 1994, Minnesota Supercomputer Center, Inc.
#
# RESTRICTED RIGHTS LEGEND
#
# Use, duplication, or disclosure of this software and its documentation
# by the Government is subject to restrictions as set forth in subdivision
# { (b) (3) (ii) } of the Rights in Technical Data and Computer Software
# clause at 52.227-7013.
#
#-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
use strict;
use File::Temp "tempdir";
my $SPREAD = 1;
my $SHIFT = 2;
my $RELIEF = 3;
my $OIL = 4;
my $EDGE = 5;
my $BENTLEY = 6;
my $BLOCK = 7;
my $MIX = 8;
#
# Set some defaults.
#
my $nframes = 30; # total number of files created (1 sec)
my $first_file = "undefined";
my $last_file = "undefined";
my $base_name = "fade"; # default base name of output files
my $image = "ppm"; # default output storage format
my $mode = $SPREAD; # default fading mode
#
# Check those command line args.
#
if (@ARGV == 0) {
usage();
}
my $n; # argument number
for ($n = 0; $n < @ARGV; $n++) {
if ("$ARGV[$n]" eq "-f") {
$n++;
$first_file = $ARGV[$n];
if (-e $first_file) {
} else {
print "I can't find $first_file\n";
exit 20;
}
} elsif ($ARGV[$n] eq "-l") {
$n++;
$last_file = $ARGV[$n];
if (-e $last_file) {
} else {
print "I can't find $last_file\n";
exit 20;
}
} elsif ($ARGV[$n] eq "-base") {
$n++;
$base_name = $ARGV[$n];
} elsif ($ARGV[$n] eq "-spread") {
$mode = $SPREAD;
} elsif ($ARGV[$n] eq "-shift") {
$mode = $SHIFT;
} elsif ($ARGV[$n] eq "-relief") {
$mode = $RELIEF;
} elsif ($ARGV[$n] eq "-oil") {
$mode = $OIL;
} elsif ("$ARGV[$n]" eq "-edge") {
$mode = $EDGE;
} elsif ("$ARGV[$n]" eq "-bentley") {
$mode = $BENTLEY;
} elsif ("$ARGV[$n]" eq "-block") {
$mode = $BLOCK;
} elsif ("$ARGV[$n]" eq "-mix") {
$mode = $MIX;
} elsif ($ARGV[$n] eq "-help" || $ARGV[$n] eq "-h") {
usage();
} else {
print "Unknown argument: $ARGV[$n]\n";
exit 100;
}
}
#
# Define a couple linear ramps.
#
# We don't use element 0 of these arrays.
my @spline10 = (0, 0, 0.11, 0.22, 0.33, 0.44, 0.55, 0.66, 0.77, 0.88, 1.0);
my @spline20 = (0, 0, 0.05, 0.11, 0.16, 0.21, 0.26, 0.32, 0.37, 0.42, 0.47,
0.53, 0.58, 0.63, 0.69, 0.74, 0.79, 0.84, 0.89, 0.95, 1.0);
#
# Just what are we supposed to do?
#
my ($height, $width); # width and height of our frames
if ($first_file ne "undefined") {
if ((`pnmfile $first_file` =~ m{\b(\d+)\sby\s(\d+)} )) {
$width = $1; $height = $2;
} else {
print("Unrecognized results from pnmfile on $first_file.\n");
exit(50);
}
} elsif ($last_file ne "undefined") {
if ((`pnmfile $last_file` =~ m{\b(\d+)\sby\s(\d+)} )) {
$width = $1; $height = $2;
} else {
print("Unrecognized results from pnmfile on $first_file.\n");
exit(50);
}
} else {
print("ppmfade: You must specify -f or -l (or both)\n");
exit(90);
}
print("Frames are " . $width . "W x " . $height . "H\n");
#
# We create a tmp-directory right here
#
my $tempdir = tempdir("ppmfade.XXXXXXX", CLEANUP => 1);
if ($first_file eq "undefined") {
print "Fading from black to ";
system("ppmmake \\#000 $width $height >$tempdir/junk1.ppm");
} else {
print "Fading from $first_file to ";
system("cp", $first_file, "$tempdir/junk1.ppm");
}
if ($last_file eq "undefined") {
print "black.\n";
system("ppmmake \\#000 $width $height >$tempdir/junk2.ppm");
} else {
print "$last_file\n";
system("cp", $last_file, "$tempdir/junk2.ppm");
}
#
# Perform the fade.
#
# Here's what our temporary files are:
# junk1.ppm: The original (fade-from) image
# junk2.ppm: The target (fade-from) image
# junk3.ppm: The frame of the fade for the current iteration of the
# the for loop.
# junk1a.ppm: If the fade involves a ppmmix sequence from one intermediate
# image to another, this is the first frame of that
# sequence.
# junk2a.ppm: This is the last frame of the above-mentioned ppmmix sequence
my $i; # Frame number
for ($i = 1; $i <= $nframes; $i++) {
print("Creating $i of $nframes...\n");
if ($mode eq $SPREAD) {
if ($i <= 10) {
my $n = $spline20[$i] * 100;
system("ppmspread $n $tempdir/junk1.ppm >$tempdir/junk3.ppm");
} elsif ($i <= 20) {
my $n;
$n = $spline20[$i] * 100;
system("ppmspread $n $tempdir/junk1.ppm >$tempdir/junk1a.ppm");
$n = (1-$spline20[$i-10]) * 100;
system("ppmspread $n $tempdir/junk2.ppm >$tempdir/junk2a.ppm");
$n = $spline10[$i-10];
system("ppmmix $n $tempdir/junk1a.ppm $tempdir/junk2a.ppm >$tempdir/junk3.ppm");
} else {
my $n = (1-$spline20[$i-10])*100;
system("ppmspread $n $tempdir/junk2.ppm >$tempdir/junk3.ppm");
}
} elsif ($mode eq $SHIFT) {
if ($i <= 10) {
my $n = $spline20[$i] * 100;
system("ppmshift $n $tempdir/junk1.ppm >$tempdir/junk3.ppm");
} elsif ($i <= 20) {
my $n;
$n = $spline20[$i] * 100;
system("ppmshift $n $tempdir/junk1.ppm >$tempdir/junk1a.ppm");
$n = (1-$spline20[$i-10])*100;
system("ppmshift $n $tempdir/junk2.ppm >$tempdir/junk2a.ppm");
$n = $spline10[$i-10];
system("ppmmix $n $tempdir/junk1a.ppm $tempdir/junk2a.ppm >$tempdir/junk3.ppm");
} else {
my $n = (1-$spline20[$i-10]) * 100;
system("ppmshift $n $tempdir/junk2.ppm >$tempdir/junk3.ppm");
}
} elsif ($mode eq $RELIEF) {
if ($i == 1) {
system("ppmrelief $tempdir/junk1.ppm >$tempdir/junk1r.ppm");
}
if ($i <= 10) {
my $n = $spline10[$i];
system("ppmmix $n $tempdir/junk1.ppm $tempdir/junk1r.ppm >$tempdir/junk3.ppm");
} elsif ($i <= 20) {
my $n = $spline10[$i-10];
system("ppmmix $n $tempdir/junk1r.ppm $tempdir/junk2r.ppm >$tempdir/junk3.ppm");
} else {
my $n = $spline10[$i-20];
system("ppmmix $n $tempdir/junk2r.ppm $tempdir/junk2.ppm >$tempdir/junk3.ppm");
}
if ($i == 10) {
system("ppmrelief $tempdir/junk2.ppm >$tempdir/junk2r.ppm");
}
} elsif ($mode eq $OIL) {
if ($i == 1) {
system("ppmtopgm $tempdir/junk1.ppm | pgmoil >$tempdir/junko.ppm");
system("rgb3toppm $tempdir/junko.ppm $tempdir/junko.ppm $tempdir/junko.ppm " .
">$tempdir/junk1o.ppm");
}
if ($i <= 10) {
my $n = $spline10[$i];
system("ppmmix $n $tempdir/junk1.ppm $tempdir/junk1o.ppm >$tempdir/junk3.ppm");
} elsif ($i <= 20) {
my $n = $spline10[$i-10];
system("ppmmix $n $tempdir/junk1o.ppm $tempdir/junk2o.ppm >$tempdir/junk3.ppm");
} else {
my $n = $spline10[$i-20];
system("ppmmix $n $tempdir/junk2o.ppm $tempdir/junk2.ppm >$tempdir/junk3.ppm");
}
if ($i == 10) {
system("ppmtopgm $tempdir/junk2.ppm | pgmoil >$tempdir/junko.ppm");
system("rgb3toppm $tempdir/junko.ppm $tempdir/junko.ppm $tempdir/junko.ppm " .
">$tempdir/junk2o.ppm");
}
} elsif ($mode eq $EDGE) {
if ($i == 1) {
system("ppmtopgm $tempdir/junk1.ppm | pgmedge >$tempdir/junko.ppm");
system("rgb3toppm $tempdir/junko.ppm $tempdir/junko.ppm $tempdir/junko.ppm " .
">$tempdir/junk1o.ppm");
}
if ($i <= 10) {
my $n = $spline10[$i];
system("ppmmix $n $tempdir/junk1.ppm $tempdir/junk1o.ppm >$tempdir/junk3.ppm");
} elsif ($i <= 20) {
my $n = $spline10[$i-10];
system("ppmmix $n $tempdir/junk1o.ppm $tempdir/junk2o.ppm >$tempdir/junk3.ppm");
} else {
my $n = $spline10[$i-20];
system("ppmmix $n $tempdir/junk2o.ppm $tempdir/junk2.ppm >$tempdir/junk3.ppm");
}
if ($i == 10) {
system("ppmtopgm $tempdir/junk2.ppm | pgmedge >$tempdir/junko.ppm");
system("rgb3toppm $tempdir/junko.ppm $tempdir/junko.ppm $tempdir/junko.ppm " .
">$tempdir/junk2o.ppm");
}
} elsif ($mode eq $BENTLEY) {
if ($i == 1) {
system("ppmtopgm $tempdir/junk1.ppm | pgmbentley >$tempdir/junko.ppm");
system("rgb3toppm $tempdir/junko.ppm $tempdir/junko.ppm $tempdir/junko.ppm " .
">$tempdir/junk1o.ppm");
}
if ($i <= 10) {
my $n = $spline10[$i];
system("ppmmix $n $tempdir/junk1.ppm $tempdir/junk1o.ppm >$tempdir/junk3.ppm");
} elsif ($i <= 20) {
my $n = $spline10[$i-10];
system("ppmmix $n $tempdir/junk1o.ppm $tempdir/junk2o.ppm >$tempdir/junk3.ppm");
} else {
my $n = $spline10[$i-20];
system("ppmmix $n $tempdir/junk2o.ppm $tempdir/junk2.ppm >$tempdir/junk3.ppm");
}
if ($i == 10) {
system("ppmtopgm $tempdir/junk2.ppm | pgmbentley >$tempdir/junko.ppm");
system("rgb3toppm $tempdir/junko.ppm $tempdir/junko.ppm $tempdir/junko.ppm " .
">$tempdir/junk2o.ppm");
}
} elsif ($mode eq $BLOCK) {
if ($i <= 10) {
my $n = 1 - 1.9*$spline20[$i];
system("pnmscale $n $tempdir/junk1.ppm | " .
"pnmscale -width $width -height $height >$tempdir/junk3.ppm");
} elsif ($i <= 20) {
my $n = $spline10[$i-10];
system("ppmmix $n $tempdir/junk1a.ppm $tempdir/junk2a.ppm >$tempdir/junk3.ppm");
} else {
my $n = 1 - 1.9*$spline20[31-$i];
system("pnmscale $n $tempdir/junk2.ppm | " .
"pnmscale -width $width -height $height >$tempdir/junk3.ppm");
}
if ($i == 10) {
system("cp", "$tempdir/junk3.ppm", "$tempdir/junk1a.ppm");
system("pnmscale $n $tempdir/junk2.ppm | " .
"pnmscale -width $width -height $height >$tempdir/junk2a.ppm");
}
} elsif ($mode eq $MIX) {
my $fade_factor = sqrt(1/($nframes-$i+1));
system("ppmmix $fade_factor $tempdir/junk1.ppm $tempdir/junk2.ppm >$tempdir/junk3.ppm");
} else {
print("Internal error: impossible mode value '$mode'\n");
}
my $outfile = sprintf("%s.%04d.ppm", $base_name, $i);
system("cp", "$tempdir/junk3.ppm", $outfile);
}
# The temporary files are automatically deleted
exit(0);
sub usage() {
print "Usage: ppmfade [-f first_file] [-l last_file]\n";
print " [-spread|-relief|-oil|-edge|-bentley|-block]\n";
print " [-base basename]\n";
print "Notes: Default base: fade\n";
print " The resulting image files will be named fade.NNNN.ppm.\n";
exit(100);
}