JezK
Edit File: pnmflip
#!/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'; use IO::Handle; sub pm_message($) { STDERR->print("pnmflip: $_[0]\n"); } 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)) { pm_message("You may specify at most one non-option parameter."); 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);