#!/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

#============================================================================

#  This is a compatibility interface to Pamflip.

#

#  It exists so existing programs and procedures that rely on Pnmflip

#  syntax continue to work.  You should not make new use of Pnmflip and

#  if you modify an old use, you should upgrade it to use Pamflip.

#

#  The one way that Pamflip is not backward compatible with Pnmflip is

#  that with Pnmflip, you can do this:

#

#     pnmflip -xy -tb

#

#  and that causes pnmflip to do both transformations (i.e. the same thing

#  as -r270).  With Pamflip, you can't specify multiple (or zero) flip

#  type options.  Instead, you would use the -xform option:

#

#    pamflip -xform=transpose,topbottom

#

#============================================================================

use strict;

use File::Basename;

use Cwd 'abs_path';

my $xformOpt;

my @miscOptions;

my $infile;

$xformOpt = '-xform=';  # initial value 

@miscOptions = ();

foreach (@ARGV) {

    if (/^-/) {

        # It's an option

        if (/^-lr$/ || /^-le.*$/) {

            $xformOpt .= "leftright,";

        } elsif (/^-tb$/ || /^-to.*$/) {

            $xformOpt .= "topbottom,";

        } elsif (/^-x.*$/ || /^-tr.*$/) {

            $xformOpt .= "transpose,";

        } elsif (/^-r9.*$/ || /^-rotate9.*$/ || /^-cc.*$/) {

            $xformOpt .= "transpose,topbottom,";

        } elsif (/^-r1.*$/ || /^-rotate1.*$/) {

            $xformOpt .= "leftright,topbottom,";

        } elsif (/^-r2.*$/ || /^-rotate2.*$/ || /^-cw$/) {

            $xformOpt .= "transpose,leftright,";

        } else {

            # It's not a transformation option; could be a Netpbm common

            # option.

            push(@miscOptions, $_);

        }

    } else {

        # It's a parameter

        if (defined($infile)) {

            print(STDERR

                  "You may specify at most one non-option parameter.\n");

            exit(10);

        } else {

            $infile = $_;

        }

    }

}

# Finish off the -xform option by removing any trailing comma

$/ = ',';

chomp($xformOpt);

my $infileParm = defined($infile) ? $infile : "-";

# We want to get Pamflip from the same directory we came from if

# it's there.  Frequently, the directory containing Netpbm programs is

# not in the PATH and we were invoked by absolute path.

my $my_directory = abs_path(dirname($0));

$ENV{"PATH"} = $my_directory . ":" . $ENV{"PATH"};

exec("pamflip", @miscOptions, $xformOpt, $infileParm);