/
tiffsigned.pl
527 lines (459 loc) · 12.2 KB
/
tiffsigned.pl
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#!perl -w
# Make a signed or floating point version of an uncompressed TIFF
use strict;
use Getopt::Long;
my $mode = "int";
GetOptions("m|mode=s" => \$mode);
use constant TIFFTAG_BITSPERSAMPLE => 258;
use constant TIFFTAG_SAMPLEFORMAT => 339;
use constant SAMPLEFORMAT_UINT => 1;
use constant SAMPLEFORMAT_INT => 2;
use constant SAMPLEFORMAT_IEEEFP => 3;
use constant SAMPLEFORMAT_VOID => 4;
use constant TIFFTAG_COMPRESSION => 259;
use constant COMPRESSION_NONE => 1;
use constant TIFFTAG_SAMPLESPERPIXEL => 277;
my $inname = shift;
my $outname = shift
or die <<EOS;
Usage: $0 [-m mode] input output
mode can be:
int
float
double
EOS
open my $fh, "<", $inname
or die "Cannot open $inname: $!\n";
binmode $fh;
my $data = do { local $/; <$fh> };
close $fh;
my $tiff = TIFFPP->new($data);
$tiff->compression == COMPRESSION_NONE
or die "TIFF must be uncompressed\n";
my $sample_count = $tiff->samples_per_pixel;
if ($mode eq "int") {
$tiff->each_strip
(
sub {
my ($data, $tiff) = @_;
my ($values, $bits, $format) = $tiff->unpack_samples($data);
my $i = 0;
for my $value (@$values) {
my $limit= 1 << ($bits->[$i++] - 1);
$value -= $limit;
$i == @$bits and $i = 0;
}
return $tiff->pack_samples($values, undef, [ (SAMPLEFORMAT_INT) x $sample_count ]);
}
);
$tiff->add_tag
(
tag => TIFFTAG_SAMPLEFORMAT,
type => "SHORT",
value => [ (SAMPLEFORMAT_INT) x $sample_count ],
);
}
elsif ($mode eq "float") {
$tiff->each_strip
(
sub {
my ($data, $tiff) = @_;
my ($values, $bits, $format) = $tiff->unpack_samples($data);
my $i = 0;
for my $value (@$values) {
my $limit = 2 ** ($bits->[$i++]) - 1;
$value /= $limit;
$i == @$bits and $i = 0;
}
return $tiff->pack_samples($values, [ (32) x $sample_count ], [ (SAMPLEFORMAT_IEEEFP) x $sample_count ]);
}
);
$tiff->add_tag
(
tag => TIFFTAG_SAMPLEFORMAT,
type => "SHORT",
value => [ (SAMPLEFORMAT_IEEEFP) x $sample_count ],
);
$tiff->add_tag
(
tag => TIFFTAG_BITSPERSAMPLE,
type => "SHORT",
value => [ ( 32 ) x $sample_count ]
);
}
elsif ($mode eq "double") {
$tiff->each_strip
(
sub {
my ($data, $tiff) = @_;
my ($values, $bits, $format) = $tiff->unpack_samples($data);
my $i = 0;
for my $value (@$values) {
my $limit= 2 ** ($bits->[$i++] - 1) - 1;
$value /= $limit;
$i == @$bits and $i = 0;
}
return $tiff->pack_samples($values, [ (64) x $sample_count ], [ (SAMPLEFORMAT_IEEEFP) x $sample_count ]);
}
);
$tiff->add_tag
(
tag => TIFFTAG_SAMPLEFORMAT,
type => "SHORT",
value => [ (SAMPLEFORMAT_IEEEFP) x $sample_count ],
);
$tiff->add_tag
(
tag => TIFFTAG_BITSPERSAMPLE,
type => "SHORT",
value => [ ( 64 ) x $sample_count ]
);
}
$tiff->save_ifd;
open my $ofh, ">", $outname;
binmode $ofh;
print $ofh $tiff->data;
close $ofh or die;
package TIFFPP;
use constant TIFFTAG_STRIPOFFSETS => 273;
use constant TIFFTAG_STRIPBYTECOUNTS => 279;
use constant TIFFTAG_SAMPLESPERPIXEL => 277;
use constant TIFFTAG_BITSPERSAMPLE => 258;
use constant TIFFTAG_SAMPLEFORMAT => 339;
use constant TIFFTAG_COMPRESSION => 259;
use constant COMPRESSION_NONE => 1;
use constant TYPE_SHORT => 3;
use constant TYPE_LONG => 4;
use constant SAMPLEFORMAT_UINT => 1;
use constant SAMPLEFORMAT_INT => 2;
use constant SAMPLEFORMAT_IEEEFP => 3;
use constant SAMPLEFORMAT_VOID => 4;
my %types;
my %type_names;
my %bit_types;
BEGIN {
%types =
(
1 =>
{
name => "BYTE",
size => 1,
pack => sub { pack("C*", @{$_[0]}), scalar @{$_[0]} },
unpack => sub { [ unpack "C*", $_[0] ] },
},
2 =>
{
name => "ASCII",
size => 1,
},
3 =>
{
name => "SHORT",
size => 2,
pack => sub { pack("$_[1]{SHORT}*", @{$_[0]}), scalar @{$_[0]} },
unpack => sub { [ unpack "$_[1]{SHORT}*", $_[0] ] },
},
4 =>
{
name => "LONG",
size => 4,
pack => sub { pack("$_[1]{LONG}*", @{$_[0]}), scalar @{$_[0]} },
unpack => sub { [ unpack "$_[1]{LONG}*", $_[0] ] },
},
5 =>
{
name => "RATIONAL",
size => 8,
pack => sub { pack("$_[1]{LONG}*", map @$_, @{$_[0]}), scalar @{$_[0]} },
unpack => sub {
my @raw = unpack("$_[1]{LONG}*", $_[0]);
return [ map [ @raw[$_*2, $_*2+1] ], 0 .. $#raw/2 ];
},
},
6 =>
{
name => "SBYTE",
size => 1,
pack => sub { pack("c*", @{$_[0]}), scalar @{$_[0]} },
unpack => sub { [ unpack "c*", $_[0] ] },
},
7 =>
{
name => "UNDEFINED",
size => 1,
pack => sub { $_[0], length $_[0] },
unpack => sub { $_[0] },
},
8 =>
{
name => "SSHORT",
size => 2,
pack => sub { pack("$_[1]{SSHORT}*", @{$_[0]}), scalar @{$_[0]} },
unpack => sub { [ unpack "$_[1]{SSHORT}*", $_[0] ] },
},
9 =>
{
name => "SLONG",
size => 4,
pack => sub { pack("$_[1]{SLONG}*", @{$_[0]}), scalar @{$_[0]} },
unpack => sub { [ unpack "$_[1]{SLONG}*", $_[0] ] },
},
10 =>
{
name => "SRATIONAL",
size => 8,
pack => sub { pack("($_[1]{SLONG}$_[1]{LONG})*", map @$_, @{$_[0]}), scalar @{$_[0]} },
unpack => sub {
my @raw = unpack("($_[1]{SLONG}$_[1]{LONG})*", $_[0]);
return [ map [ @raw[$_*2, $_*2+1] ], 0 .. $#raw/2 ];
},
},
11 =>
{
name => "FLOAT",
size => 4,
pack => sub { pack("$_[1]{FLOAT}*", @{$_[0]}), scalar @{$_[0]} },
unpack => sub { [ unpack "$_[1]{FLOAT}*", $_[0] ] },
},
12 =>
{
name => "DOUBLE",
size => 8,
pack => sub { pack("$_[1]{DOUBLE}*", @{$_[0]}), scalar @{$_[0]} },
unpack => sub { [ unpack "$_[1]{DOUBLE}*", $_[0] ] },
},
);
%type_names = map { $types{$_}->{name} => $_ } keys %types;
%bit_types =
(
8 => 'BYTE',
16 => 'SHORT',
32 => 'LONG',
);
}
sub new {
my ($class, $data) = @_;
my %opts =
(
data => $data,
);
if (substr($data, 0, 2) eq "II") {
$opts{LONG} = "V";
$opts{SHORT} = "v";
$opts{SLONG} = "l<";
$opts{SSHORT} = "s<";
$opts{FLOAT} = "f<";
$opts{DOUBLE} = "d<";
}
elsif (substr($data, 0, 2) eq "MM") {
$opts{LONG} = "N";
$opts{SHORT} = "n";
$opts{SLONG} = "l>";
$opts{SSHORT} = "s>";
$opts{FLOAT} = "f>";
$opts{DOUBLE} = "d>";
}
else {
die "Not a TIFF file (bad byte-order)\n";
}
substr($data, 2, 2) eq "\x2A\0"
or die "Not a TIFF file (bad TIFF marker)\n";
my $ifd_off = unpack($opts{LONG}, substr($data, 4, 4));
$ifd_off < length $data
or die "Invalid TIFF - IFD offset too long\n";
my $self = bless \%opts, $class;
$self->_load_ifd(4, $ifd_off);
$self;
}
sub data {
$_[0]{data};
}
sub _load_ifd {
my ($self, $off_ptr, $off) = @_;
$self->{off_ptr} = $off_ptr;
$self->{ifd_off} = $off;
my $count = unpack($self->{SHORT}, substr($self->{data}, $off, 2));
$self->{ifd_size} = $count;
$off += 2;
my @ifds;
my ($short, $long) = ($self->{SHORT}, $self->{LONG});
for my $index (1 .. $count) {
my ($tag, $type, $count, $value) =
unpack("$short$short${long}a4", substr($self->{data}, $off, 12));
$types{$type}
or die "Unknown type $type in IFD\n";
my $size = $types{$type}{size} * $count;
my $item_off = $size > 4 ? unpack($long, $value) : $off + 8;
my $data = substr($self->{data}, $item_off, $size);
push @ifds,
{
tag => $tag,
type => $type,
count => $count,
offset => $item_off,
data => $data,
original => 1,
};
$off += 12;
}
my %ifd = map { $_->{tag} => $_ } @ifds;
$self->{ifd} = \@ifds;
$self->{ifdh} = \%ifd;
$self->{next_ifd} = unpack($long, substr($self->{data}, $off, 4));
}
sub save_ifd {
my ($self) = @_;
my @ifd = sort { $a->{tag} <=> $b->{tag} } @{$self->{ifd}};
my $ifd = pack($self->{SHORT}, scalar(@ifd));
my ($short, $long) = ($self->{SHORT}, $self->{LONG});
for my $entry (@ifd) {
my %entry = %$entry;
if (!$entry{original} && length $entry{data} > 4) {
$entry{offset} = length $self->{data};
$self->{data} .= $entry{data};
}
if (length $entry{data} > 4) {
$ifd .= pack("$short$short$long$long", @entry{qw(tag type count offset)});
}
else {
$ifd .= pack("$short$short${long}a4", @entry{qw(tag type count data)});
}
}
$ifd .= pack($long, $self->{next_ifd});
if (scalar(@ifd) <= $self->{ifd_size}) {
substr($self->{data}, $self->{ifd_off}, length $ifd, $ifd);
}
else {
$self->{ifd_off} = length $self->{data};
$self->{data} .= $ifd;
substr($self->{data}, $self->{off_ptr}, 4, pack($long, $self->{ifd_off}));
}
}
sub remove_tag {
my ($self, $tag) = @_;
if (delete $self->{ifdh}{$tag}) {
$self->{ifd} = [ grep $_->{tag} != $tag, @{$self->{ifd}} ];
}
}
sub add_tag {
my ($self, %opts) = @_;
unless ($opts{type} =~ /[0-9]/) {
$opts{type} = $type_names{$opts{type}}
or die "add_tag: Invalid type\n";
}
if ($opts{value} && !exists $opts{data}) {
@opts{qw(data count)} = $types{$opts{type}}{pack}->($opts{value}, $self);
}
if ($self->{ifdh}{$opts{tag}}) {
$self->remove_tag($opts{tag});
}
push @{$self->{ifd}}, \%opts;
$self->{ifdh}{$opts{tag}} = \%opts;
}
sub tag_value {
my ($self, $tag) = @_;
my $val = $self->{ifdh}{$tag}
or return;
return $types{$val->{type}}{unpack}->($val->{data}, $self);
}
sub each_strip {
my ($self, $cb) = @_;
my $offsets = $self->tag_value(TIFFTAG_STRIPOFFSETS);
my $sizes = $self->tag_value(TIFFTAG_STRIPBYTECOUNTS);
@$offsets == @$sizes
or die "Strip offset and byte counts do not match\n";
for my $i (0 .. $#$offsets) {
my $bytes = substr($self->{data}, $offsets->[$i], $sizes->[$i]);
$bytes = $cb->($bytes, $self);
if (length $bytes > $sizes->[$i]) {
$offsets->[$i] = length $self->{data};
$self->{data} .= $bytes;
}
else {
substr($self->{data}, $offsets->[$i], length $bytes, $bytes);
}
$sizes->[$i] = length $bytes;
}
my $off_type = TYPE_SHORT;
my $count_type = TYPE_SHORT;
$_ > 0xFFFF and $off_type = TYPE_LONG for @$offsets;
$_ > 0xFFFF and $count_type = TYPE_LONG for @$sizes;
$self->add_tag
(
tag => TIFFTAG_STRIPOFFSETS,
type => $off_type,
value => $offsets,
);
$self->add_tag
(
tag => TIFFTAG_STRIPBYTECOUNTS,
type => $count_type,
value => $sizes,
);
}
sub _pack_format {
my ($self, $bits, $formats) = @_;
$bits ||= $self->_bitspersample;
$formats ||= $self->_sampleformat;
@$bits == @$formats
or die "Mismatch between bitsperlsample and sampleformat counts\n";
my $pack = '';
for my $i (0 .. $#$bits) {
my $type;
if ($formats->[$i] == SAMPLEFORMAT_IEEEFP) {
if ($bits->[$i] == 32) {
$type = "FLOAT";
}
elsif ($bits->[$i] == 64) {
$type = "DOUBLE";
}
else {
die "No IEEEFP format for bits $bits->[$i]\n";
}
}
else {
$type = $bit_types{$bits->[$i]}
or die "Can't pack $bits->[$i] bits\n";
$type = "S$type" if $formats->[$i] == SAMPLEFORMAT_INT;
}
$pack .= $self->{$type};
}
wantarray ? ($pack, $bits, $formats) : $pack;
}
sub samples_per_pixel {
my ($self) = @_;
my $spp = $self->tag_value(TIFFTAG_SAMPLESPERPIXEL);
$spp or return 1;
return $spp->[0];
}
sub compression {
my ($self) = @_;
my $comp = $self->tag_value(TIFFTAG_COMPRESSION);
$comp or return COMPRESSION_NONE;
return $comp->[0];
}
sub _bitspersample {
my ($self) = @_;
my $bps = $self->tag_value(TIFFTAG_BITSPERSAMPLE);
$bps or $bps = [ ( 1 ) x $self->samples_per_pixel ];
return $bps;
}
sub _sampleformat {
my ($self) = @_;
my $formats = $self->tag_value(TIFFTAG_SAMPLEFORMAT);
unless ($formats) {
$formats = [ ( SAMPLEFORMAT_UINT ) x $self->samples_per_pixel ];
}
return $formats;
}
sub unpack_samples {
my ($self, $data, $bits, $formats) = @_;
my ($pack, $rbits, $rformats) = $self->_pack_format($bits, $formats);
my $values = [ unpack "($pack)*", $data ];
wantarray ? ( $values, $rbits, $rformats) : $values;
}
sub pack_samples {
my ($self, $data, $bits, $formats) = @_;
my $pack = $self->_pack_format($bits, $formats);
pack "($pack)*", @$data;
}