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#!/usr/bin/perl -w
#============================================================================
# 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);
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