126 lines
3.4 KiB
Perl
126 lines
3.4 KiB
Perl
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#------------------------------------------------------------------------------
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# File: PrintIM.pm
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#
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# Description: Read PrintIM meta information
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#
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# Revisions: 04/07/2004 - P. Harvey Created
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#------------------------------------------------------------------------------
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package Image::ExifTool::PrintIM;
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use strict;
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use vars qw($VERSION);
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use Image::ExifTool qw(:DataAccess);
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$VERSION = '1.07';
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sub ProcessPrintIM($$$);
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# PrintIM table (proprietary specification by Epson)
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%Image::ExifTool::PrintIM::Main = (
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PROCESS_PROC => \&ProcessPrintIM,
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GROUPS => { 0 => 'PrintIM', 1 => 'PrintIM', 2 => 'Printing' },
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PRINT_CONV => 'sprintf("0x%.8x", $val)',
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TAG_PREFIX => 'PrintIM',
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PrintIMVersion => { # values: 0100, 0250, 0260, 0300
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Description => 'PrintIM Version',
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PrintConv => undef,
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},
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# the following names are from http://www.kanzaki.com/ns/exif
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# but the decoding is unknown:
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# 9 => { Name => 'PIMContrast', Unknown => 1 }, #1
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# 10 => { Name => 'PIMBrightness', Unknown => 1 }, #1
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# 11 => { Name => 'PIMColorbalance', Unknown => 1 }, #1
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# 12 => { Name => 'PIMSaturation', Unknown => 1 }, #1
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# 13 => { Name => 'PIMSharpness', Unknown => 1 }, #1
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);
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#------------------------------------------------------------------------------
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# Process PrintIM IFD
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# Inputs: 0) ExifTool object ref, 1) dirInfo ref, 2) tag table ref
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# Returns: 1 on success
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sub ProcessPrintIM($$$)
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{
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my ($et, $dirInfo, $tagTablePtr) = @_;
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my $dataPt = $$dirInfo{DataPt};
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my $offset = $$dirInfo{DirStart};
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my $size = $$dirInfo{DirLen};
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my $verbose = $et->Options('Verbose');
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unless ($size) {
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$et->Warn('Empty PrintIM data', 1);
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return 0;
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}
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unless ($size > 15) {
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$et->Warn('Bad PrintIM data');
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return 0;
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}
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unless (substr($$dataPt, $offset, 7) eq 'PrintIM') {
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$et->Warn('Invalid PrintIM header');
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return 0;
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}
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# check size of PrintIM block
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my $num = Get16u($dataPt, $offset + 14);
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if ($size < 16 + $num * 6) {
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# size is too big, maybe byte ordering is wrong
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ToggleByteOrder();
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$num = Get16u($dataPt, $offset + 14);
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if ($size < 16 + $num * 6) {
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$et->Warn('Bad PrintIM size');
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return 0;
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}
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}
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$verbose and $et->VerboseDir('PrintIM', $num);
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$et->HandleTag($tagTablePtr, 'PrintIMVersion', substr($$dataPt, $offset + 8, 4),
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DataPt => $dataPt,
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Start => $offset + 8,
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Size => 4,
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);
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my $n;
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for ($n=0; $n<$num; ++$n) {
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my $pos = $offset + 16 + $n * 6;
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my $tag = Get16u($dataPt, $pos);
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my $val = Get32u($dataPt, $pos + 2);
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$et->HandleTag($tagTablePtr, $tag, $val,
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Index => $n,
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DataPt => $dataPt,
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Start => $pos + 2,
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Size => 4,
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);
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}
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return 1;
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}
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1; # end
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__END__
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=head1 NAME
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Image::ExifTool::PrintIM - Read PrintIM meta information
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=head1 SYNOPSIS
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This module is loaded automatically by Image::ExifTool when required.
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=head1 DESCRIPTION
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This module contains definitions required by Image::ExifTool to interpret
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Print Image Matching meta information.
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=head1 AUTHOR
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Copyright 2003-2016, Phil Harvey (phil at owl.phy.queensu.ca)
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This library is free software; you can redistribute it and/or modify it
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under the same terms as Perl itself.
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=head1 SEE ALSO
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L<Image::ExifTool::TagNames/PrintIM Tags>,
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L<Image::ExifTool(3pm)|Image::ExifTool>
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=cut
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