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#!/usr/local/bin/perl
#=======================================================================
# ____ ____ _____ _ ____ ___ ____
# | _ \| _ \| ___| _ _ / \ | _ \_ _| |___ \
# | |_) | | | | |_ (_) (_) / _ \ | |_) | | __) |
# | __/| |_| | _| _ _ / ___ \| __/| | / __/
# |_| |____/|_| (_) (_) /_/ \_\_| |___| |_____|
#
# A Perl Module Chain to faciliate the Creation and Modification
# of High-Quality "Portable Document Format (PDF)" Files.
#
# Copyright 1999-2004 Alfred Reibenschuh <areibens@cpan.org>.
#
#=======================================================================
#
# PERMISSION TO USE, COPY, MODIFY, AND DISTRIBUTE THIS FILE FOR
# ANY PURPOSE WITH OR WITHOUT FEE IS HEREBY GRANTED, PROVIDED THAT
# THE ABOVE COPYRIGHT NOTICE AND THIS PERMISSION NOTICE APPEAR IN ALL
# COPIES.
#
# THIS FILE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
# WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
# IN NO EVENT SHALL THE AUTHORS AND COPYRIGHT HOLDERS AND THEIR
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
# OF THE USE OF THIS FILE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# $Id: pdf-optimize.pl,v 1.2 2004/01/28 14:12:09 fredo Exp $
#
#=======================================================================
use PDF::API2::Basic::PDF::File;
use PDF::API2::Basic::PDF::Utils;
use PDF::API2;
sub walk_obj {
my ($objs,$spdf,$tpdf,$obj,@keys)=@_;
my $tobj;
if(ref($obj)=~/Objind$/) {
$obj->realise;
}
return($objs->{scalar $obj}) if(defined $objs->{scalar $obj});
die "object already copied" if($obj->{' copied'});
$tobj=$obj->copy($spdf);
$obj->{' copied'}=1;
$tpdf->new_obj($tobj) if($obj->is_obj($spdf) && !$tobj->is_obj($tpdf));
$objs->{scalar $obj}=$tobj;
if(ref($obj)=~/Array$/ || (UNIVERSAL::can($obj,'isa') && $obj->isa('PDF::API2::Basic::PDF::Array'))) {
$tobj->{' val'}=[];
foreach my $k ($obj->elementsof) {
$k->realise if(ref($k)=~/Objind$/);
$tobj->add_elements(walk_obj($objs,$spdf,$tpdf,$k));
}
} elsif(ref($obj)=~/Dict$/ || (UNIVERSAL::can($obj,'isa') && $obj->isa('PDF::API2::Basic::PDF::Dict'))) {
@keys=keys(%{$tobj}) if(scalar @keys <1);
foreach my $k (@keys) {
next if($k=~/^ /);
next unless(defined($obj->{$k}));
$tobj->{$k}=walk_obj($objs,$spdf,$tpdf,$obj->{$k});
}
if($obj->{' stream'}) {
if($tobj->{Filter}) {
$tobj->{' nofilt'}=1;
} else {
delete $tobj->{' nofilt'};
$tobj->{Filter}=PDFArray(PDFName('FlateDecode'));
}
$tobj->{' stream'}=$obj->{' stream'};
}
} else {
$obj->realise;
return(walk_obj($objs,$spdf,$tpdf,$obj));
}
delete $tobj->{' streamloc'};
delete $tobj->{' streamsrc'};
return($tobj);
}
if(scalar @ARGV<2) {
print "usage: $0 infile outfile\n";
exit(1);
}
$spdf=PDF::API2::Basic::PDF::File->open($ARGV[0]);
$tpdf=PDF::API2::Basic::PDF::File->_new;
$mycache={};
$tpdf->{Root}=walk_obj($mycache,$spdf,$tpdf,$spdf->{Root});
$tpdf->{Info}=walk_obj($mycache,$spdf,$tpdf,$spdf->{Info});
$tpdf->out_file($ARGV[1]);
__END__
=head1 AUTHOR
alfred reibenschuh
=head1 HISTORY
$Log: pdf-optimize.pl,v $
Revision 1.2 2004/01/28 14:12:09 fredo
updated licence statement
Revision 1.1 2004/01/19 19:59:49 fredo
initial import
=cut
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