#=======================================================================
# ____ ____ _____ _ ____ ___ ____
# | _ \| _ \| ___| _ _ / \ | _ \_ _| |___ \
# | |_) | | | | |_ (_) (_) / _ \ | |_) | | __) |
# | __/| |_| | _| _ _ / ___ \| __/| | / __/
# |_| |____/|_| (_) (_) /_/ \_\_| |___| |_____|
#
# A Perl Module Chain to faciliate the Creation and Modification
# of High-Quality "Portable Document Format (PDF)" Files.
#
# Copyright 1999-2005 Alfred Reibenschuh <areibens@cpan.org>.
#
#=======================================================================
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the
# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
# Boston, MA 02111-1307, USA.
#
# $Id: JPEG.pm,v 2.1 2007/03/17 20:38:51 areibens Exp $
#
#=======================================================================
package PDF::API2::Resource::XObject::Image::JPEG;
BEGIN {
use PDF::API2::Util;
use PDF::API2::Basic::PDF::Utils;
use PDF::API2::Resource::XObject::Image;
use POSIX;
use vars qw(@ISA $VERSION);
@ISA = qw( PDF::API2::Resource::XObject::Image );
( $VERSION ) = sprintf '%i.%03i', split(/\./,('$Revision: 2.1 $' =~ /Revision: (\S+)\s/)[0]); # $Date: 2007/03/17 20:38:51 $
}
no warnings qw[ deprecated recursion uninitialized ];
=item $res = PDF::API2::Resource::XObject::Image::JPEG->new $pdf, $file [, $name]
Returns a jpeg-image object.
=cut
sub new
{
my ($class,$pdf,$file,$name) = @_;
my $self;
my $fh = IO::File->new;
$class = ref $class if ref $class;
$self=$class->SUPER::new($pdf,$name|| 'Jx'.pdfkey());
$pdf->new_obj($self) unless($self->is_obj($pdf));
$self->{' apipdf'}=$pdf;
if(ref $file)
{
$fh=$file;
}
else
{
open($fh,$file);
}
binmode($fh,':raw');
$self->read_jpeg($fh);
if(ref $file)
{
seek($fh,0,0);
$self->{' stream'}='';
my $buf='';
while(!eof($fh)) {
read($fh,$buf,512);
$self->{' stream'}.=$buf;
}
$self->{Length}=PDFNum(length $self->{' stream'});
}
else
{
$self->{Length}=PDFNum(-s $file);
$self->{' streamfile'}=$file;
}
$self->filters('DCTDecode');
$self->{' nofilt'}=1;
return($self);
}
=item $res = PDF::API2::Resource::XObject::Image::JPEG->new_api $api, $file [, $name]
Returns a jpeg-image object. This method is different from 'new' that
it needs an PDF::API2-object rather than a Text::PDF::File-object.
=cut
sub new_api {
my ($class,$api,@opts)=@_;
my $obj=$class->new($api->{pdf},@opts);
$obj->{' api'}=$api;
return($obj);
}
sub read_jpeg {
my $self = shift @_;
my $fh = shift @_;
my ($buf, $p, $h, $w, $c, $ff, $mark, $len);
$fh->seek(0,0);
$fh->read($buf,2);
while (1) {
$fh->read($buf,4);
my($ff, $mark, $len) = unpack("CCn", $buf);
last if( $ff != 0xFF);
last if( $mark == 0xDA || $mark == 0xD9); # SOS/EOI
last if( $len < 2);
last if( $fh->eof);
$fh->read($buf,$len-2);
next if ($mark == 0xFE);
next if ($mark >= 0xE0 && $mark <= 0xEF);
if (($mark >= 0xC0) && ($mark <= 0xCF) &&
($mark != 0xC4) && ($mark != 0xC8) && ($mark != 0xCC)) {
($p, $h, $w, $c) = unpack("CnnC", substr($buf, 0, 6));
last;
}
}
$self->width($w);
$self->height($h);
$self->bpc($p);
if($c==3) {
$self->colorspace('DeviceRGB');
} elsif($c==4) {
$self->colorspace('DeviceCMYK');
} elsif($c==1) {
$self->colorspace('DeviceGray');
}
return($self);
}
1;
__END__
=head1 AUTHOR
alfred reibenschuh
=head1 HISTORY
$Log: JPEG.pm,v $
Revision 2.1 2007/03/17 20:38:51 areibens
replaced IOString dep. with scalar IO.
Revision 2.0 2005/11/16 02:18:23 areibens
revision workaround for SF cvs import not to screw up CPAN
Revision 1.2 2005/11/16 01:27:50 areibens
genesis2
Revision 1.1 2005/11/16 01:19:27 areibens
genesis
Revision 1.11 2005/09/28 17:02:47 fredo
fixed iostring handling
Revision 1.10 2005/06/17 19:44:04 fredo
fixed CPAN modulefile versioning (again)
Revision 1.9 2005/06/17 18:53:34 fredo
fixed CPAN modulefile versioning (dislikes cvs)
Revision 1.8 2005/03/14 22:01:31 fredo
upd 2005
Revision 1.7 2004/12/16 00:30:55 fredo
added no warn for recursion
Revision 1.6 2004/06/15 09:14:54 fredo
removed cr+lf
Revision 1.5 2004/06/07 19:44:44 fredo
cleaned out cr+lf for lf
Revision 1.4 2004/03/02 21:55:24 fredo
fixed reading jpeg image info marker according to ITU-T T.81 spec
Revision 1.3 2003/12/08 13:06:11 Administrator
corrected to proper licencing statement
Revision 1.2 2003/11/30 17:37:16 Administrator
merged into default
Revision 1.1.1.1.2.2 2003/11/30 16:57:09 Administrator
merged into default
Revision 1.1.1.1.2.1 2003/11/30 16:00:42 Administrator
added CVS id/log
=cut