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|
#! /usr/bin/perl
use Getopt::Long;
use IPC::Open2;
use warnings;
use strict;
Getopt::Long::Configure ("bundling");
# Give an array if the command has least one argument.
my @pdf2ps = 'pdftops';
my @pscrop = ('psnup2.pl', '-s1', '-l1');
my @psresize = 'psresize';
my @psnup = 'psnup';
my @psbook = 'psbook';
my @ps2pdf = 'ps2pdf';
my $tmpdir = '/tmp';
my $nup = 1;
my $margin = 1;
#TODO: units
my $crop;
my $book;
my $papersize;
GetOptions( "nup|n=i" => \$nup,
"1" => sub { $nup = 1 },
"2" => sub { $nup = 2 },
"4" => sub { $nup = 4 },
"8" => sub { $nup = 8 },
"crop|c" => \$crop,
"book|b" => \$book,
"papersize|p=s" => \$papersize,
"margin|m=s" => \$margin );
die "I can handle only one file at the same time :P"
if $#ARGV > 0;
die "How should I put a non-positive number of pages per sheet?"
if $nup <= 0;
unless (defined $papersize) {
$papersize = `paperconf` or die "Can't guess papersize";
chomp $papersize;
}
for (my $n = $nup; $n > 1; $n /= 2) {
die "nup should be a power of two"
unless $n % 2 == 0;
}
my $filename = $ARGV[0];
$filename = "-" unless defined $filename;
my $filename2 = $filename;
$filename2 = "(stdin)" if $filename eq "-";
my ($mresize, $mcrop, $mnup) = (0,0,0);
if (defined $crop) {
$mresize = 0;
if (not defined $book && $nup > 1) {
$mcrop = $margin/2;
$mnup = $mcrop;
} else {
$mcrop = $margin;
$mnup = 0;
}
} else {
$mcrop = 0;
if (not defined $book && $nup > 1) {
$mresize = $margin/2;
$mnup = $mresize;
} else {
$mresize = $margin;
$mnup = 0;
}
}
open(FILE, $filename)
or die "Can't read `$filename'";
my $filetype;
my $fstline = <FILE>;
if (defined $fstline && $fstline =~ /%!PS.*/) {
$filetype = "PS";
} elsif (defined $fstline && $fstline =~ /%PDF.*/) {
$filetype = "PDF";
} else {
die "Can't recognize the type of `$filename2'";
}
# Auxiliary files, to remove
my @auxfiles;
# Auxiliary file descriptors, to close
my @auxfds;
# Pids, to waid for
my @pids;
my $pid;
if ($filename eq "-") {
# Need to copy the whole input to an auxiliary file, since
# conversion from pdf to ps requires random access to the data
# TODO: only for pdfs
$filename = "$tmpdir/pdftool-stdin-" . int(rand 2**16) . lc ".$filetype";
open AUXFD, '>', "$filename"
or die "Can't read write into `$filename'";
push @auxfiles, "$filename";
# cat > $filename
seek STDIN, 0, 0;
while (<FILE>) {
print AUXFD $_;
}
close AUXFD;
}
close FILE;
# Convert to ps, or read the input file
if ($filetype eq "PDF") {
$pid = open *INPS, "-|", @pdf2ps, "$filename", '-'
or die "Error with `@pdf2ps $filename -'";
push @pids, $pid;
} else {
open *INPS, '<', "$filename"
or die "Can't open `$filename'";
}
push @auxfds, fileno INPS;
# Resize file to our papersize
$pid = open2 *PSRESIZE, "<&INPS", @psresize, "-p$papersize"
or die "Error with `@psresize -p$papersize'";
# Note: open2 closes the filehandles for us :)
push @pids, $pid;
# Pscrop
if (defined $crop) {
$pid = open2 *PSCROP, "<&PSRESIZE", @pscrop, "-p$papersize", "-m${mnup}"
or die "Error with `@pscrop -p$papersize -m${mnup}cm'";
push @pids, $pid;
} else {
*PSCROP = *PSRESIZE;
}
# Psbook
if (defined $book) {
$pid = open2 *PSBOOK, "<&PSCROP", "@psbook"
or die "Error with `@psbook";
push @pids, $pid;
} else {
*PSBOOK = *PSCROP;
}
# Psnup
# TODO: sometimes unecessary
$pid = open2 *PSNUP, "<&PSBOOK", @psnup, "-p$papersize", "-m${mnup}cm", "-$nup"
or die "Error with `@psnup -p$papersize -m${mnup}cm -$nup'";
push @pids, $pid;
# Convert back to pdf
# TODO: not always stdout
# TODO: return same type as input
$pid = open2 ">&STDOUT", "<&PSNUP", @ps2pdf, "-sPAPERSIZE=$papersize", '-', '-'
or die "Error with `@ps2pdf -sPAPERSIZE=$papersize - -'";
push @pids, $pid;
# Avoid zombies
map {waitpid $_, 0} @pids;
# Close auxiliary filehandles
map {close $_} @auxfds;
# Delete auxiliary files
unlink @auxfiles;
|
