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#------------------------------------------------------------------------------
# File: PSP.pm
#
# Description: Read Paint Shop Pro meta information
#
# Revisions: 2010/01/23 - P. Harvey Created
#
# References: 1) http://www.jasc.com/support/kb/articles/pspspec.asp
#------------------------------------------------------------------------------
package Image::ExifTool::PSP;
use strict;
use vars qw($VERSION);
use Image::ExifTool qw(:DataAccess :Utils);
use Image::ExifTool::Exif;
$VERSION = '1.05';
sub ProcessExtData($$$);
# PSP info
%Image::ExifTool::PSP::Main = (
GROUPS => { 2 => 'Image' },
VARS => { ALPHA_FIRST => 1 },
NOTES => q{
Tags extracted from Paint Shop Pro images (PSP, PSPIMAGE, PSPFRAME,
PSPSHAPE, PSPTUBE and TUB extensions).
},
# FileVersions:
# 3.0 => PSP 5
# 4.0 => PSP 6
# 5.0 => PSP 7
# 6.0 => PSP 8
# 7.0 => PSP 9
# ? => PSP X
# ? => PSP X1 (is this the same as X?)
# ? => PSP X2
# 10.0 => PSP X3 (= PSP 13)
FileVersion => { PrintConv => '$val=~tr/ /./; $val' },
0 => [
{
Condition => '$$self{PSPFileVersion} > 3',
Name => 'ImageInfo',
SubDirectory => {
TagTable => 'Image::ExifTool::PSP::Image',
Start => 4,
},
},
{
Name => 'ImageInfo',
SubDirectory => {
TagTable => 'Image::ExifTool::PSP::Image',
},
},
],
1 => {
Name => 'CreatorInfo',
SubDirectory => { TagTable => 'Image::ExifTool::PSP::Creator' },
},
10 => {
Name => 'ExtendedInfo',
SubDirectory => { TagTable => 'Image::ExifTool::PSP::Ext' },
},
# this is inside the composite image bank block (16), which I don't want to parse...
#18 => {
# Name => 'PreviewImage',
# Groups => { 2 => 'Preview' },
# RawConv => '$self->ValidateImage(\$val,$tag)',
#},
);
# the PSP image block
%Image::ExifTool::PSP::Image = (
PROCESS_PROC => \&Image::ExifTool::ProcessBinaryData,
GROUPS => { 2 => 'Image' },
0 => { Name => 'ImageWidth', Format => 'int32u' },
4 => { Name => 'ImageHeight', Format => 'int32u' },
8 => { Name => 'ImageResolution', Format => 'double' },
16 => {
Name => 'ResolutionUnit',
Format => 'int8u',
PrintConv => {
0 => 'None',
1 => 'inches',
2 => 'cm',
},
},
17 => {
Name => 'Compression',
Format => 'int16u',
PrintConv => {
0 => 'None',
1 => 'RLE',
2 => 'LZ77',
3 => 'JPEG',
},
},
19 => { Name => 'BitsPerSample',Format => 'int16u' },
21 => { Name => 'Planes', Format => 'int16u' },
23 => { Name => 'NumColors', Format => 'int32u' },
);
# the PSP creator data block
%Image::ExifTool::PSP::Creator = (
PROCESS_PROC => \&ProcessExtData,
GROUPS => { 2 => 'Image' },
PRIORITY => 0, # prefer EXIF if it exists
0 => 'Title',
1 => {
Name => 'CreateDate',
Format => 'int32u',
Groups => { 2 => 'Time' },
ValueConv => 'Image::ExifTool::ConvertUnixTime($val,1)',
PrintConv => '$self->ConvertDateTime($val)',
},
2 => {
Name => 'ModifyDate',
Format => 'int32u',
Groups => { 2 => 'Time' },
ValueConv => 'Image::ExifTool::ConvertUnixTime($val,1)',
PrintConv => '$self->ConvertDateTime($val)',
},
3 => {
Name => 'Artist',
Groups => { 2 => 'Author' },
},
4 => {
Name => 'Copyright',
Groups => { 2 => 'Author' },
},
5 => 'Description',
6 => {
Name => 'CreatorAppID',
Format => 'int32u',
PrintConv => {
0 => 'Unknown',
1 => 'Paint Shop Pro',
},
},
7 => {
Name => 'CreatorAppVersion',
Format => 'int8u',
Count => 4,
ValueConv => 'join(" ",reverse split " ", $val)', # low byte first
PrintConv => '$val=~tr/ /./; $val',
},
);
# the PSP extended data block
%Image::ExifTool::PSP::Ext = (
PROCESS_PROC => \&ProcessExtData,
GROUPS => { 2 => 'Image' },
3 => {
Name => 'EXIFInfo', #(don't change this name, it is used in the code)
SubDirectory => { TagTable => 'Image::ExifTool::Exif::Main' },
},
);
#------------------------------------------------------------------------------
# Extract information from the extended data block
# Inputs: 0) ExifTool object ref, 1) dirInfo ref, 2) tag table ref
# Returns: 1 on success
sub ProcessExtData($$$)
{
my ($et, $dirInfo, $tagTablePtr) = @_;
my $dataPt = $$dirInfo{DataPt};
my $dirLen = $$dirInfo{DirLen};
my $pos = 0;
# loop through sub-blocks
while ($pos + 10 < $dirLen) {
unless (substr($$dataPt, $pos, 4) eq "~FL\0") {
$et->Warn('Lost synchronization while reading sub blocks');
last;
}
my $tag = Get16u($dataPt, $pos + 4);
my $len = Get32u($dataPt, $pos + 6);
$pos += 10 + $len;
if ($pos > $dirLen) {
$et->Warn("Truncated sub block ID=$tag len=$len");
last;
}
next unless $$tagTablePtr{$tag};
my $tagInfo = $et->GetTagInfo($tagTablePtr, $tag) or next;
my $start = $pos - $len;
unless ($$tagInfo{Name} eq 'EXIFInfo') {
$et->HandleTag($tagTablePtr, $tag, undef,
TagInfo => $tagInfo,
DataPt => $dataPt,
DataPos => $$dirInfo{DataPos},
DataLen => length $$dataPt,
Start => $start,
Size => $len,
);
next;
}
# validate EXIF block header and set byte order
next unless $len > 14 and substr($$dataPt, $pos - $len, 6) eq "Exif\0\0";
next unless SetByteOrder(substr($$dataPt, $start + 6, 2));
# This is REALLY annoying... They use a standard TIFF offset to point to
# the first IFD, but after that the offsets are relative to the start of
# the IFD instead of the TIFF base, which means that I must handle it as a
# special case. Dumb, dumb...
$start += 14;
my %dirInfo = (
DirName => 'EXIF',
Parent => 'PSP',
DataPt => $dataPt,
DataPos => -$start, # data position relative to Base
DataLen => length $$dataPt,
DirStart => $start,
Base => $start + $$dirInfo{DataPos}, # absolute base offset
Multi => 0,
);
my $exifTable = GetTagTable($$tagInfo{SubDirectory}{TagTable});
Image::ExifTool::Exif::ProcessExif($et, \%dirInfo, $exifTable);
SetByteOrder('II');
}
return 1;
}
#------------------------------------------------------------------------------
# Extract information from a PSP file
# Inputs: 0) ExifTool object reference, 1) dirInfo reference
# Returns: 1 on success, 0 if this wasn't a valid PSP file
sub ProcessPSP($$)
{
my ($et, $dirInfo) = @_;
my $raf = $$dirInfo{RAF};
my ($buff, $tag, $len, $err);
return 0 unless $raf->Read($buff, 32) == 32 and
$buff eq "Paint Shop Pro Image File\x0a\x1a\0\0\0\0\0" and
$raf->Read($buff, 4) == 4;
$et->SetFileType();
SetByteOrder('II');
my $tagTablePtr = GetTagTable('Image::ExifTool::PSP::Main');
my @a = unpack('v*', $buff);
# figure out block header length for this format PSP file
my $hlen = $a[0] > 3 ? 10 : 14;
$$et{PSPFileVersion} = $a[0]; # save for use in Condition
$et->HandleTag($tagTablePtr, FileVersion => "@a");
# loop through blocks in file
my $pos = 36;
for (;;) {
last unless $raf->Read($buff, $hlen) == $hlen;
unless ($buff =~ /^~BK\0/) {
$et->Warn('Lost synchronization while reading main PSP blocks');
last;
}
$tag = Get16u(\$buff, 4);
$len = Get32u(\$buff, $hlen - 4);
$pos += $hlen + $len;
unless ($$tagTablePtr{$tag}) {
$raf->Seek($len, 1) or $err=1, last;
next;
}
$raf->Read($buff, $len) == $len or $err=1, last;
$et->HandleTag($tagTablePtr, $tag, $buff,
DataPt => \$buff,
DataPos => $pos - $len,
Size => $len,
);
}
$err and $et->Warn("Truncated main block ID=$tag len=$len");
return 1;
}
1; # end
__END__
=head1 NAME
Image::ExifTool::PSP - Read Paint Shop Pro meta information
=head1 SYNOPSIS
This module is used by Image::ExifTool
=head1 DESCRIPTION
This module contains routines required by Image::ExifTool to extract
information from Paint Shop Pro images.
=head1 AUTHOR
Copyright 2003-2018, Phil Harvey (phil at owl.phy.queensu.ca)
This library is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.
=head1 REFERENCES
=over 4
=item L<http://www.jasc.com/support/kb/articles/pspspec.asp>
=back
=head1 SEE ALSO
L<Image::ExifTool::TagNames/PSP Tags>,
L<Image::ExifTool(3pm)|Image::ExifTool>
=cut
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