tangetools/mirrorpdf/mirrorpdf
2022-11-08 18:15:06 +01:00

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#!/bin/bash
: <<=cut
=pod
=head1 NAME
mirrorpdf - Mirror PDF horizontally
=head1 SYNOPSIS
B<mirrorpdf> I<file.pdf>
=head1 DESCRIPTION
B<mirrorpdf> mirrors the pages of a PDF-file. Output is in
I<file>_mirror.pdf.
=head1 EXAMPLE
Mirror pages of foo.pdf:
mirrorpdf foo.pdf
=head1 AUTHOR
Copyright (C) 2018 Ole Tange,
http://ole.tange.dk and Free Software Foundation, Inc.
=head1 LICENSE
Copyright (C) 2012 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
at your option any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
=head1 DEPENDENCIES
B<mirrorpdf> uses B<pdf2ps>, B<pstops> (from psutils), B<pdftk>, and
B<ps2pdf>.
=head1 SEE ALSO
B<man>
=cut
mirror() {
tmp=`mktemp /tmp/mirpdfXXXXX`
pdf2ps "$1" - |
# Flip both horizontally and vertically
pstops H |
ps2pdf - $tmp
# Rotate 180 deg
pdftk $tmp cat 1-endnorth output "$2"
rm $tmp
}
export -f mirror
parallel mirror {} {.}_mirror.pdf ::: "$@"