#------------------------------------------------------------------------------ # File: Photoshop.pm # # Description: Read/write Photoshop IRB meta information # # Revisions: 02/06/2004 - P. Harvey Created # 02/25/2004 - P. Harvey Added hack for problem with old photoshops # 10/04/2004 - P. Harvey Added a bunch of tags (ref Image::MetaData::JPEG) # but left most of them commented out until I have enough # information to write PrintConv routines for them to # display something useful # 07/08/2005 - P. Harvey Added support for reading PSD files # 01/07/2006 - P. Harvey Added PSD write support # 11/04/2006 - P. Harvey Added handling of resource name # # References: 1) http://www.fine-view.com/jp/lab/doc/ps6ffspecsv2.pdf # 2) http://www.ozhiker.com/electronics/pjmt/jpeg_info/irb_jpeg_qual.html # 3) Matt Mueller private communication (tests with PS CS2) # 4) http://www.fileformat.info/format/psd/egff.htm # 5) http://www.telegraphics.com.au/svn/psdparse/trunk/resources.c # 6) http://libpsd.graphest.com/files/Photoshop%20File%20Formats.pdf # 7) http://www.adobe.com/devnet-apps/photoshop/fileformatashtml/ #------------------------------------------------------------------------------ package Image::ExifTool::Photoshop; use strict; use vars qw($VERSION $AUTOLOAD $iptcDigestInfo); use Image::ExifTool qw(:DataAccess :Utils); $VERSION = '1.62'; sub ProcessPhotoshop($$$); sub WritePhotoshop($$$); sub ProcessLayers($$$); # map of where information is stored in PSD image my %psdMap = ( IPTC => 'Photoshop', XMP => 'Photoshop', EXIFInfo => 'Photoshop', IFD0 => 'EXIFInfo', IFD1 => 'IFD0', ICC_Profile => 'Photoshop', ExifIFD => 'IFD0', GPS => 'IFD0', SubIFD => 'IFD0', GlobParamIFD => 'IFD0', PrintIM => 'IFD0', InteropIFD => 'ExifIFD', MakerNotes => 'ExifIFD', ); # tag information for PhotoshopThumbnail and PhotoshopBGRThumbnail my %thumbnailInfo = ( Writable => 'undef', Protected => 1, RawConv => 'my $img=substr($val,0x1c); $self->ValidateImage(\$img,$tag)', ValueConvInv => q{ my $et = new Image::ExifTool; my @tags = qw{ImageWidth ImageHeight FileType}; my $info = $et->ImageInfo(\$val, @tags); my ($w, $h, $type) = @$info{@tags}; $w and $h and $type eq 'JPEG' or warn("Not a valid JPEG image\n"), return undef; my $wbytes = int(($w * 24 + 31) / 32) * 4; return pack('N6n2', 1, $w, $h, $wbytes, $wbytes * $h, length($val), 24, 1) . $val; }, ); # tag info to decode Photoshop Unicode string my %unicodeString = ( ValueConv => sub { my ($val, $et) = @_; return '' if length($val) < 4; my $len = unpack('N', $val) * 2; return '' if length($val) < 4 + $len; return $et->Decode(substr($val, 4, $len), 'UCS2', 'MM'); }, ValueConvInv => sub { my ($val, $et) = @_; return pack('N', length $val) . $et->Encode($val, 'UCS2', 'MM'); }, ); # Photoshop APP13 tag table # (set Unknown flag for information we don't want to display normally) %Image::ExifTool::Photoshop::Main = ( GROUPS => { 2 => 'Image' }, PROCESS_PROC => \&ProcessPhotoshop, WRITE_PROC => \&WritePhotoshop, 0x03e8 => { Unknown => 1, Name => 'Photoshop2Info' }, 0x03e9 => { Unknown => 1, Name => 'MacintoshPrintInfo' }, 0x03ea => { Unknown => 1, Name => 'XMLData', Binary => 1 }, #PH 0x03eb => { Unknown => 1, Name => 'Photoshop2ColorTable' }, 0x03ed => { Name => 'ResolutionInfo', SubDirectory => { TagTable => 'Image::ExifTool::Photoshop::Resolution', }, }, 0x03ee => { Name => 'AlphaChannelsNames', ValueConv => 'Image::ExifTool::Photoshop::ConvertPascalString($self,$val)', }, 0x03ef => { Unknown => 1, Name => 'DisplayInfo' }, 0x03f0 => { Unknown => 1, Name => 'PStringCaption' }, 0x03f1 => { Unknown => 1, Name => 'BorderInformation' }, 0x03f2 => { Unknown => 1, Name => 'BackgroundColor' }, 0x03f3 => { Unknown => 1, Name => 'PrintFlags', Format => 'int8u' }, 0x03f4 => { Unknown => 1, Name => 'BW_HalftoningInfo' }, 0x03f5 => { Unknown => 1, Name => 'ColorHalftoningInfo' }, 0x03f6 => { Unknown => 1, Name => 'DuotoneHalftoningInfo' }, 0x03f7 => { Unknown => 1, Name => 'BW_TransferFunc' }, 0x03f8 => { Unknown => 1, Name => 'ColorTransferFuncs' }, 0x03f9 => { Unknown => 1, Name => 'DuotoneTransferFuncs' }, 0x03fa => { Unknown => 1, Name => 'DuotoneImageInfo' }, 0x03fb => { Unknown => 1, Name => 'EffectiveBW', Format => 'int8u' }, 0x03fc => { Unknown => 1, Name => 'ObsoletePhotoshopTag1' }, 0x03fd => { Unknown => 1, Name => 'EPSOptions' }, 0x03fe => { Unknown => 1, Name => 'QuickMaskInfo' }, 0x03ff => { Unknown => 1, Name => 'ObsoletePhotoshopTag2' }, 0x0400 => { Unknown => 1, Name => 'TargetLayerID', Format => 'int16u' }, # (LayerStateInfo) 0x0401 => { Unknown => 1, Name => 'WorkingPath' }, 0x0402 => { Unknown => 1, Name => 'LayersGroupInfo', Format => 'int16u' }, 0x0403 => { Unknown => 1, Name => 'ObsoletePhotoshopTag3' }, 0x0404 => { Name => 'IPTCData', SubDirectory => { DirName => 'IPTC', TagTable => 'Image::ExifTool::IPTC::Main', }, }, 0x0405 => { Unknown => 1, Name => 'RawImageMode' }, 0x0406 => { #2 Name => 'JPEG_Quality', SubDirectory => { TagTable => 'Image::ExifTool::Photoshop::JPEG_Quality', }, }, 0x0408 => { Unknown => 1, Name => 'GridGuidesInfo' }, 0x0409 => { Name => 'PhotoshopBGRThumbnail', Notes => 'this is a JPEG image, but in BGR format instead of RGB', %thumbnailInfo, Groups => { 2 => 'Preview' }, }, 0x040a => { Name => 'CopyrightFlag', Writable => 'int8u', Groups => { 2 => 'Author' }, ValueConv => 'join(" ",unpack("C*", $val))', ValueConvInv => 'pack("C*",split(" ",$val))', PrintConv => { #3 0 => 'False', 1 => 'True', }, }, 0x040b => { Name => 'URL', Writable => 'string', Groups => { 2 => 'Author' }, }, 0x040c => { Name => 'PhotoshopThumbnail', %thumbnailInfo, Groups => { 2 => 'Preview' }, }, 0x040d => { Name => 'GlobalAngle', Writable => 'int32u', ValueConv => 'unpack("N",$val)', ValueConvInv => 'pack("N",$val)', }, 0x040e => { Unknown => 1, Name => 'ColorSamplersResource' }, 0x040f => { Name => 'ICC_Profile', SubDirectory => { TagTable => 'Image::ExifTool::ICC_Profile::Main', }, }, 0x0410 => { Unknown => 1, Name => 'Watermark', Format => 'int8u' }, 0x0411 => { Unknown => 1, Name => 'ICC_Untagged', Format => 'int8u' }, 0x0412 => { Unknown => 1, Name => 'EffectsVisible', Format => 'int8u' }, 0x0413 => { Unknown => 1, Name => 'SpotHalftone' }, 0x0414 => { Unknown => 1, Name => 'IDsBaseValue', Description => 'IDs Base Value', Format => 'int32u' }, 0x0415 => { Unknown => 1, Name => 'UnicodeAlphaNames' }, 0x0416 => { Unknown => 1, Name => 'IndexedColorTableCount', Format => 'int16u' }, 0x0417 => { Unknown => 1, Name => 'TransparentIndex', Format => 'int16u' }, 0x0419 => { Name => 'GlobalAltitude', Writable => 'int32u', ValueConv => 'unpack("N",$val)', ValueConvInv => 'pack("N",$val)', }, 0x041a => { Name => 'SliceInfo', SubDirectory => { TagTable => 'Image::ExifTool::Photoshop::SliceInfo' }, }, 0x041b => { Name => 'WorkflowURL', %unicodeString }, 0x041c => { Unknown => 1, Name => 'JumpToXPEP' }, 0x041d => { Unknown => 1, Name => 'AlphaIdentifiers' }, 0x041e => { Name => 'URL_List', List => 1, Writable => 1, ValueConv => sub { my ($val, $et) = @_; return '' if length($val) < 4; my $num = unpack('N', $val); my ($i, @vals); my $pos = 4; for ($i=0; $i<$num; ++$i) { $pos += 8; # (skip word and ID) last if length($val) < $pos + 4; my $len = unpack("x${pos}N", $val) * 2; last if length($val) < $pos + 4 + $len; push @vals, $et->Decode(substr($val,$pos+4,$len), 'UCS2', 'MM'); $pos += 4 + $len; } return \@vals; }, # (this is tricky to make writable) }, 0x0421 => { Name => 'VersionInfo', SubDirectory => { TagTable => 'Image::ExifTool::Photoshop::VersionInfo', }, }, 0x0422 => { Name => 'EXIFInfo', #PH (Found in EPS and PSD files) SubDirectory => { TagTable=> 'Image::ExifTool::Exif::Main', ProcessProc => \&Image::ExifTool::ProcessTIFF, WriteProc => \&Image::ExifTool::WriteTIFF, }, }, 0x0423 => { Unknown => 1, Name => 'ExifInfo2', Binary => 1 }, #5 0x0424 => { Name => 'XMP', SubDirectory => { TagTable => 'Image::ExifTool::XMP::Main', }, }, 0x0425 => { Name => 'IPTCDigest', Writable => 'string', Protected => 1, Notes => q{ this tag indicates provides a way for XMP-aware applications to indicate that the XMP is synchronized with the IPTC. When writing, special values of "new" and "old" represent the digests of the IPTC from the edited and original files respectively, and are undefined if the IPTC does not exist in the respective file. Set this to "new" as an indication that the XMP is synchronized with the IPTC }, # also note the 'new' feature requires that the IPTC comes before this tag is written ValueConv => 'unpack("H*", $val)', ValueConvInv => q{ if (lc($val) eq 'new' or lc($val) eq 'old') { { local $SIG{'__WARN__'} = sub { }; return lc($val) if eval { require Digest::MD5 }; } warn "Digest::MD5 must be installed\n"; return undef; } return pack('H*', $val) if $val =~ /^[0-9a-f]{32}$/i; warn "Value must be 'new', 'old' or 32 hexadecimal digits\n"; return undef; } }, 0x0426 => { Name => 'PrintScaleInfo', SubDirectory => { TagTable => 'Image::ExifTool::Photoshop::PrintScaleInfo' }, }, 0x0428 => { Name => 'PixelInfo', SubDirectory => { TagTable => 'Image::ExifTool::Photoshop::PixelInfo' }, }, 0x0429 => { Unknown => 1, Name => 'LayerComps' }, #5 0x042a => { Unknown => 1, Name => 'AlternateDuotoneColors' }, #5 0x042b => { Unknown => 1, Name => 'AlternateSpotColors' }, #5 0x042d => { #7 Name => 'LayerSelectionIDs', Description => 'Layer Selection IDs', Unknown => 1, ValueConv => q{ my ($n, @a) = unpack("nN*",$val); $#a = $n - 1 if $n > @a; return join(' ', @a); }, }, 0x042e => { Unknown => 1, Name => 'HDRToningInfo' }, #7 0x042f => { Unknown => 1, Name => 'PrintInfo' }, #7 0x0430 => { Unknown => 1, Name => 'LayerGroupsEnabledID', Format => 'int8u' }, #7 0x0431 => { Unknown => 1, Name => 'ColorSamplersResource2' }, #7 0x0432 => { Unknown => 1, Name => 'MeasurementScale' }, #7 0x0433 => { Unknown => 1, Name => 'TimelineInfo' }, #7 0x0434 => { Unknown => 1, Name => 'SheetDisclosure' }, #7 0x0435 => { Unknown => 1, Name => 'DisplayInfo' }, #7 0x0436 => { Unknown => 1, Name => 'OnionSkins' }, #7 0x0438 => { Unknown => 1, Name => 'CountInfo' }, #7 0x043a => { Unknown => 1, Name => 'PrintInfo2' }, #7 0x043b => { Unknown => 1, Name => 'PrintStyle' }, #7 0x043c => { Unknown => 1, Name => 'MacintoshNSPrintInfo' }, #7 0x043d => { Unknown => 1, Name => 'WindowsDEVMODE' }, #7 0x043e => { Unknown => 1, Name => 'AutoSaveFilePath' }, #7 0x043f => { Unknown => 1, Name => 'AutoSaveFormat' }, #7 0x0440 => { Unknown => 1, Name => 'PathSelectionState' }, #7 # 0x07d0-0x0bb6 Path information 0x0bb7 => { Name => 'ClippingPathName', # convert from a Pascal string (ignoring 6 bytes of unknown data after string) ValueConv => q{ my $len = ord($val); $val = substr($val, 0, $len+1) if $len < length($val); return Image::ExifTool::Photoshop::ConvertPascalString($self,$val); }, }, 0x0bb8 => { Unknown => 1, Name => 'OriginPathInfo' }, #7 # 0x0fa0-0x1387 - plug-in resources (ref 7) 0x1b58 => { Unknown => 1, Name => 'ImageReadyVariables' }, #7 0x1b59 => { Unknown => 1, Name => 'ImageReadyDataSets' }, #7 0x1f40 => { Unknown => 1, Name => 'LightroomWorkflow' }, #7 0x2710 => { Unknown => 1, Name => 'PrintFlagsInfo' }, ); # Photoshop JPEG quality record (ref 2) %Image::ExifTool::Photoshop::JPEG_Quality = ( PROCESS_PROC => \&Image::ExifTool::ProcessBinaryData, WRITE_PROC => \&Image::ExifTool::WriteBinaryData, CHECK_PROC => \&Image::ExifTool::CheckBinaryData, FORMAT => 'int16s', GROUPS => { 2 => 'Image' }, 0 => { Name => 'PhotoshopQuality', Writable => 1, PrintConv => '$val + 4', PrintConvInv => '$val - 4', }, 1 => { Name => 'PhotoshopFormat', PrintConv => { 0x0000 => 'Standard', 0x0001 => 'Optimized', 0x0101 => 'Progressive', }, }, 2 => { Name => 'ProgressiveScans', PrintConv => { 1 => '3 Scans', 2 => '4 Scans', 3 => '5 Scans', }, }, ); # Photoshop Slices %Image::ExifTool::Photoshop::SliceInfo = ( PROCESS_PROC => \&Image::ExifTool::ProcessBinaryData, 20 => { Name => 'SlicesGroupName', Format => 'var_ustr32' }, 24 => { Name => 'NumSlices', Format => 'int32u' }, ); # Photoshop resolution information #PH %Image::ExifTool::Photoshop::Resolution = ( PROCESS_PROC => \&Image::ExifTool::ProcessBinaryData, WRITE_PROC => \&Image::ExifTool::WriteBinaryData, CHECK_PROC => \&Image::ExifTool::CheckBinaryData, FORMAT => 'int16u', FIRST_ENTRY => 0, WRITABLE => 1, GROUPS => { 2 => 'Image' }, 0 => { Name => 'XResolution', Format => 'int32u', Priority => 0, ValueConv => '$val / 0x10000', ValueConvInv => 'int($val * 0x10000 + 0.5)', PrintConv => 'int($val * 100 + 0.5) / 100', PrintConvInv => '$val', }, 2 => { Name => 'DisplayedUnitsX', PrintConv => { 1 => 'inches', 2 => 'cm', }, }, 4 => { Name => 'YResolution', Format => 'int32u', Priority => 0, ValueConv => '$val / 0x10000', ValueConvInv => 'int($val * 0x10000 + 0.5)', PrintConv => 'int($val * 100 + 0.5) / 100', PrintConvInv => '$val', }, 6 => { Name => 'DisplayedUnitsY', PrintConv => { 1 => 'inches', 2 => 'cm', }, }, ); # Photoshop version information %Image::ExifTool::Photoshop::VersionInfo = ( PROCESS_PROC => \&Image::ExifTool::ProcessBinaryData, WRITE_PROC => \&Image::ExifTool::WriteBinaryData, CHECK_PROC => \&Image::ExifTool::CheckBinaryData, FIRST_ENTRY => 0, GROUPS => { 2 => 'Image' }, # (always 1) 0 => { Name => 'PhotoshopVersion', Format => 'int32u' }, 4 => { Name => 'HasRealMergedData', Format => 'int8u', PrintConv => { 0 => 'No', 1 => 'Yes' } }, 5 => { Name => 'WriterName', Format => 'var_ustr32' }, 9 => { Name => 'ReaderName', Format => 'var_ustr32' }, # (always 1) 13 => { Name => 'FileVersion', Format => 'int32u' }, ); # Print Scale %Image::ExifTool::Photoshop::PrintScaleInfo = ( PROCESS_PROC => \&Image::ExifTool::ProcessBinaryData, WRITE_PROC => \&Image::ExifTool::WriteBinaryData, CHECK_PROC => \&Image::ExifTool::CheckBinaryData, FIRST_ENTRY => 0, GROUPS => { 2 => 'Image' }, 0 => { Name => 'PrintStyle', Format => 'int16u', PrintConv => { 0 => 'Centered', 1 => 'Size to Fit', 2 => 'User Defined', }, }, 2 => { Name => 'PrintPosition', Format => 'float[2]' }, 10 => { Name => 'PrintScale', Format => 'float' }, ); # Pixel Aspect Ratio %Image::ExifTool::Photoshop::PixelInfo = ( PROCESS_PROC => \&Image::ExifTool::ProcessBinaryData, WRITE_PROC => \&Image::ExifTool::WriteBinaryData, CHECK_PROC => \&Image::ExifTool::CheckBinaryData, FIRST_ENTRY => 0, GROUPS => { 2 => 'Image' }, # 0 - version 4 => { Name => 'PixelAspectRatio', Format => 'double' }, ); # Photoshop PSD file header %Image::ExifTool::Photoshop::Header = ( PROCESS_PROC => \&Image::ExifTool::ProcessBinaryData, FORMAT => 'int16u', GROUPS => { 2 => 'Image' }, NOTES => 'This information is found in the PSD file header.', 6 => 'NumChannels', 7 => { Name => 'ImageHeight', Format => 'int32u' }, 9 => { Name => 'ImageWidth', Format => 'int32u' }, 11 => 'BitDepth', 12 => { Name => 'ColorMode', PrintConvColumns => 2, PrintConv => { 0 => 'Bitmap', 1 => 'Grayscale', 2 => 'Indexed', 3 => 'RGB', 4 => 'CMYK', 7 => 'Multichannel', 8 => 'Duotone', 9 => 'Lab', }, }, ); # Layer information %Image::ExifTool::Photoshop::Layers = ( PROCESS_PROC => \&ProcessLayers, GROUPS => { 2 => 'Image' }, NOTES => 'Tags extracted from Photoshop layer information.', # tags extracted from layer information # (tag ID's are for convenience only) _xcnt => { Name => 'LayerCount', Format => 'int16u' }, _xrct => { Name => 'LayerRectangles', Format => 'int32u', Count => 4, List => 1, Notes => 'top left bottom right', }, _xnam => { Name => 'LayerNames', Format => 'string', List => 1, ValueConv => q{ my $charset = $self->Options('CharsetPhotoshop') || 'Latin'; return $self->Decode($val, $charset); }, }, _xbnd => { Name => 'LayerBlendModes', Format => 'undef', List => 1, RawConv => 'GetByteOrder() eq "II" ? pack "N*", unpack "V*", $val : $val', PrintConv => { pass => 'Pass Through', norm => 'Normal', diss => 'Dissolve', dark => 'Darken', 'mul '=> 'Multiply', idiv => 'Color Burn', lbrn => 'Linear Burn', dkCl => 'Darker Color', lite => 'Lighten', scrn => 'Screen', 'div '=> 'Color Dodge', lddg => 'Linear Dodge', lgCl => 'Lighter Color', over => 'Overlay', sLit => 'Soft Light', hLit => 'Hard Light', vLit => 'Vivid Light', lLit => 'Linear Light', pLit => 'Pin Light', hMix => 'Hard Mix', diff => 'Difference', smud => 'Exclusion', fsub => 'Subtract', fdiv => 'Divide', 'hue '=> 'Hue', 'sat '=> 'Saturation', colr => 'Color', 'lum '=> 'Luminosity', }, }, _xopc => { Name => 'LayerOpacities', Format => 'int8u', List => 1, ValueConv => '100 * $val / 255', PrintConv => 'sprintf("%d%%",$val)', }, # tags extracted from additional layer information (tag ID's are real) # - must be able to accomodate a blank entry to preserve the list ordering luni => { Name => 'LayerUnicodeNames', List => 1, RawConv => q{ return '' if length($val) < 4; my $len = Get32u(\$val, 0); return $self->Decode(substr($val, 4, $len * 2), 'UCS2'); }, }, lyid => { Name => 'LayerIDs', Description => 'Layer IDs', Format => 'int32u', List => 1, Unknown => 1, }, shmd => { # layer metadata (undocumented structure) # (for now, only extract layerTime. May also contain "layerXMP" -- # it would be nice to decode this but I need a sample) Name => 'LayerModifyDates', Groups => { 2 => 'Time' }, List => 1, RawConv => q{ return '' unless $val =~ /layerTime(doub|buod)(.{8})/s; my $tmp = $2; return GetDouble(\$tmp, 0); }, ValueConv => 'length $val ? ConvertUnixTime($val,1) : ""', PrintConv => 'length $val ? $self->ConvertDateTime($val) : ""', }, ); # tags extracted from ImageSourceData found in TIFF images (ref PH) %Image::ExifTool::Photoshop::DocumentData = ( PROCESS_PROC => \&ProcessDocumentData, GROUPS => { 2 => 'Image' }, Layr => { Name => 'Layers', SubDirectory => { TagTable => 'Image::ExifTool::Photoshop::Layers' }, }, Lr16 => { # (NC) Name => 'Layers', SubDirectory => { TagTable => 'Image::ExifTool::Photoshop::Layers' }, }, ); # image data %Image::ExifTool::Photoshop::ImageData = ( PROCESS_PROC => \&Image::ExifTool::ProcessBinaryData, GROUPS => { 2 => 'Image' }, 0 => { Name => 'Compression', Format => 'int16u', PrintConv => { 0 => 'Uncompressed', 1 => 'RLE', 2 => 'ZIP without prediction', 3 => 'ZIP with prediction', }, }, ); # tags for unknown resource types %Image::ExifTool::Photoshop::Unknown = ( GROUPS => { 2 => 'Unknown' }, ); # define reference to IPTCDigest tagInfo hash for convenience $iptcDigestInfo = $Image::ExifTool::Photoshop::Main{0x0425}; #------------------------------------------------------------------------------ # AutoLoad our writer routines when necessary # sub AUTOLOAD { return Image::ExifTool::DoAutoLoad($AUTOLOAD, @_); } #------------------------------------------------------------------------------ # Convert pascal string(s) to something we can use # Inputs: 1) Pascal string data # Returns: Strings, concatenated with ', ' sub ConvertPascalString($$) { my ($et, $inStr) = @_; my $outStr = ''; my $len = length($inStr); my $i=0; while ($i < $len) { my $n = ord(substr($inStr, $i, 1)); last if $i + $n >= $len; $i and $outStr .= ', '; $outStr .= substr($inStr, $i+1, $n); $i += $n + 1; } my $charset = $et->Options('CharsetPhotoshop') || 'Latin'; return $et->Decode($outStr, $charset); } #------------------------------------------------------------------------------ # Process Photoshop layers and mask information section of PSD/PSB file # Inputs: 0) ExifTool ref, 1) DirInfo ref, 2) tag table ref # Returns: 1 on success (and seeks to the end of this section) sub ProcessLayersAndMask($$$) { local $_; my ($et, $dirInfo, $tagTablePtr) = @_; my $raf = $$dirInfo{RAF}; my $fileType = $$et{VALUE}{FileType}; my $data; return 0 unless $fileType eq 'PSD' or $fileType eq 'PSB'; # (no layer section in CS1 files) # (some words are 4 bytes in PSD files and 8 bytes in PSB) my ($psb, $psiz) = $fileType eq 'PSB' ? (1, 8) : (undef, 4); # read the layer information header my $n = $psiz * 2 + 2; $raf->Read($data, $n) == $n or return 0; my $tot = $psb ? Get64u(\$data, 0) : Get32u(\$data, 0); # length of layer and mask info return 1 if $tot == 0; my $end = $raf->Tell() - $psiz - 2 + $tot; $data = substr $data, $psiz; my $len = $psb ? Get64u(\$data, 0) : Get32u(\$data, 0); # length of layer info section my $num = Get16s(\$data, $psiz); # check for Lr16 block if layers length is 0 (ref https://forums.adobe.com/thread/1540914) if ($len == 0 and $num == 0) { $raf->Read($data,10) == 10 or return 0; if ($data =~/^..8BIMLr16/s) { $raf->Read($data, $psiz+2) == $psiz+2 or return 0; $len = $psb ? Get64u(\$data, 0) : Get32u(\$data, 0); } else { $raf->Seek(-10, 1) or return 0; } } $len += 2; # include layer count with layer info section $raf->Seek(-2, 1) or return 0; my %dinfo = ( RAF => $raf, DirLen => $len, ); $$et{IsPSB} = $psb; # set PSB flag ProcessLayers($et, \%dinfo, $tagTablePtr); # seek to the end of this section and return success flag return $raf->Seek($end, 0) ? 1 : 0; } #------------------------------------------------------------------------------ # Process Photoshop layers (beginning with layer count) # Inputs: 0) ExifTool ref, 1) DirInfo ref, 2) tag table ref # Returns: 1 on success # Notes: Uses ExifTool IsPSB member to determine whether file is PSB format sub ProcessLayers($$$) { local $_; my ($et, $dirInfo, $tagTablePtr) = @_; my ($i, $n, %count, $buff, $buf2); my $raf = $$dirInfo{RAF}; my $dirLen = $$dirInfo{DirLen}; my $verbose = $$et{OPTIONS}{Verbose}; my %dinfo = ( DataPt => \$buff, Base => $raf->Tell() ); my $pos = 0; return 0 if $dirLen < 2; $raf->Read($buff, 2) == 2 or return 0; my $num = Get16s(\$buff, 0); $num = -$num if $num < 0; # (first channel is transparency data if negative) $et->VerboseDir('Layers', $num, $dirLen); $et->HandleTag($tagTablePtr, '_xcnt', $num, Start => $pos, Size => 2, %dinfo); # LayerCount my $oldIndent = $$et{INDENT}; $$et{INDENT} .= '| '; $pos += 2; my $psb = $$et{IsPSB}; # is PSB format? my $psiz = $psb ? 8 : 4; for ($i=0; $i<$num; ++$i) { $et->VPrint(0, $oldIndent.'+ [Layer '.($i+1)." of $num]\n"); last if $pos + 18 > $dirLen; $raf->Read($buff, 18) == 18 or last; $dinfo{DataPos} = $pos; # save the layer rectangle $et->HandleTag($tagTablePtr, '_xrct', undef, Start => 0, Size => 16, %dinfo); my $numChannels = Get16u(\$buff, 16); $n = (2 + $psiz) * $numChannels; # size of channel information $raf->Seek($n, 1) or last; $pos += 18 + $n; last if $pos + 20 > $dirLen; $raf->Read($buff, 20) == 20 or last; $dinfo{DataPos} = $pos; my $sig = substr($buff, 0, 4); $sig =~ /^(8BIM|MIB8)$/ or last; # verify signature $et->HandleTag($tagTablePtr, '_xbnd', undef, Start => 4, Size => 4, %dinfo); $et->HandleTag($tagTablePtr, '_xopc', undef, Start => 8, Size => 1, %dinfo); my $nxt = $pos + 16 + Get32u(\$buff, 12); $n = Get32u(\$buff, 16); # get size of layer mask data $pos += 20 + $n; # skip layer mask data last if $pos + 4 > $dirLen; $raf->Seek($n, 1) and $raf->Read($buff, 4) == 4 or last; $n = Get32u(\$buff, 0); # get size of layer blending ranges $pos += 4 + $n; # skip layer blending ranges data last if $pos + 1 > $dirLen; $raf->Seek($n, 1) and $raf->Read($buff, 1) == 1 or last; $n = Get8u(\$buff, 0); # get length of layer name last if $pos + 1 + $n > $dirLen; $raf->Read($buff, $n) == $n or last; $dinfo{DataPos} = $pos + 1; $et->HandleTag($tagTablePtr, '_xnam', undef, Start => 0, Size => $n, %dinfo); my $frag = ($n + 1) & 0x3; $raf->Seek(4 - $frag, 1) or last if $frag; $n = ($n + 4) & 0xfffffffc; # +1 for length byte then pad to multiple of 4 bytes $pos += $n; # process additional layer info while ($pos + 12 <= $nxt) { $raf->Read($buff, 12) == 12 or last; my $dat = substr($buff, 0, 8); $dat = pack 'N*', unpack 'V*', $dat if GetByteOrder() eq 'II'; my $sig = substr($dat, 0, 4); last unless $sig eq '8BIM' or $sig eq '8B64'; # verify signature my $tag = substr($dat, 4, 4); # (some structures have an 8-byte size word [augh!] # --> it would be great if '8B64' indicated a 64-bit version, and this may well # be the case, but it is not mentioned in the Photoshop file format specification) if ($psb and $tag =~ /^(LMsk|Lr16|Lr32|Layr|Mt16|Mt32|Mtrn|Alph|FMsk|lnk2|FEid|FXid|PxSD)$/) { last if $pos + 16 > $nxt; $raf->Read($buf2, 4) == 4 or last; $buff .= $buf2; $n = Get64u(\$buff, 8); $pos += 4; } else { $n = Get32u(\$buff, 8); } $pos += 12; last if $pos + $n > $nxt; $frag = $n & 0x3; if ($$tagTablePtr{$tag} or $verbose) { # pad with empty entries if necessary to keep the same index for each item in the layer $count{$tag} = 0 unless defined $count{$tag}; $raf->Read($buff, $n) == $n or last; $dinfo{DataPos} = $pos; while ($count{$tag} < $i) { $et->HandleTag($tagTablePtr, $tag, ''); ++$count{$tag}; } $et->HandleTag($tagTablePtr, $tag, undef, Start => 0, Size => $n, %dinfo); ++$count{$tag}; if ($frag) { $raf->Seek(4 - $frag, 1) or last; $n += 4 - $frag; # pad to multiple of 4 bytes (PH NC) } } else { $n += 4 - $frag if $frag; $raf->Seek($n, 1) or last; } $pos += $n; # step to start of next structure } $pos = $nxt; } $$et{INDENT} = $oldIndent; return 1; } #------------------------------------------------------------------------------ # Process Photoshop ImageSourceData # Inputs: 0) ExifTool ref, 1) dirInfo ref, 2) tag table ref # Returns: 1 on success sub ProcessDocumentData($$$) { my ($et, $dirInfo, $tagTablePtr) = @_; my $verbose = $$et{OPTIONS}{Verbose}; my $raf = $$dirInfo{RAF}; my $dirLen = $$dirInfo{DirLen}; my $pos = 36; # length of header my $buff; $et->VerboseDir('Photoshop Document Data', undef, $dirLen); unless ($raf) { my $dataPt = $$dirInfo{DataPt}; my $start = $$dirInfo{DirStart} || 0; $raf = new File::RandomAccess($dataPt); $raf->Seek($start, 0) if $start; $dirLen = length $$dataPt - $start unless defined $dirLen; $et->VerboseDump($dataPt, Start => $start, Len => $dirLen, Base => $$dirInfo{Base}); } unless ($raf->Read($buff, $pos) == $pos and $buff =~ /^Adobe Photoshop Document Data (Block|V0002)\0/) { $et->Warn('Invalid Photoshop Document Data'); return 0; } my $psb = ($1 eq 'V0002'); my %dinfo = ( DataPt => \$buff ); my ($n, $setOrder); $$et{IsPSB} = $psb; # set PSB flag (needed when handling Layers directory) while ($pos + 12 <= $dirLen) { $raf->Read($buff, 8) == 8 or last; # set byte order according to byte order of first signature SetByteOrder($buff =~ /^(8BIM|8B64)/ ? 'MM' : 'II') if $pos == 36; $buff = pack 'N*', unpack 'V*', $buff if GetByteOrder() eq 'II'; my $sig = substr($buff, 0, 4); last unless $sig eq '8BIM' or $sig eq '8B64'; # verify signature my $tag = substr($buff, 4, 4); if ($psb and $tag =~ /^(LMsk|Lr16|Lr32|Layr|Mt16|Mt32|Mtrn|Alph|FMsk|lnk2|FEid|FXid|PxSD)$/) { last if $pos + 16 > $dirLen; $raf->Read($buff, 8) == 8 or last; $n = Get64u(\$buff, 0); $pos += 4; } else { $raf->Read($buff, 4) == 4 or last; $n = Get32u(\$buff, 0); } $pos += 12; last if $pos + $n > $dirLen; my $pad = (4 - ($n & 3)) & 3; # number of padding bytes my $tagInfo = $$tagTablePtr{$tag}; if ($tagInfo or $verbose) { if ($tagInfo and $$tagInfo{SubDirectory}) { my $fpos = $raf->Tell() + $n + $pad; my $subTable = GetTagTable($$tagInfo{SubDirectory}{TagTable}); $et->ProcessDirectory({ RAF => $raf, DirLen => $n }, $subTable); $raf->Seek($fpos, 0) or last; } else { $dinfo{DataPos} = $raf->Tell(); $dinfo{Start} = 0; $dinfo{Size} = $n; $raf->Read($buff, $n) == $n or last; $et->HandleTag($tagTablePtr, $tag, undef, %dinfo); $raf->Seek($pad, 1) or last; } } else { $raf->Seek($n + $pad, 1) or last; } $pos += $n + $pad; # step to start of next structure } return 1; } #------------------------------------------------------------------------------ # Process Photoshop APP13 record # Inputs: 0) ExifTool object reference, 1) Reference to directory information # 2) Tag table reference # Returns: 1 on success sub ProcessPhotoshop($$$) { my ($et, $dirInfo, $tagTablePtr) = @_; my $dataPt = $$dirInfo{DataPt}; my $pos = $$dirInfo{DirStart}; my $dirEnd = $pos + $$dirInfo{DirLen}; my $verbose = $et->Options('Verbose'); my $success = 0; # ignore non-standard XMP while in strict MWG compatibility mode if (($Image::ExifTool::MWG::strict or $et->Options('Validate')) and $$et{FILE_TYPE} =~ /^(JPEG|TIFF|PSD)$/) { my $path = $et->MetadataPath(); unless ($path =~ /^(JPEG-APP13-Photoshop|TIFF-IFD0-Photoshop|PSD)$/) { if ($Image::ExifTool::MWG::strict) { $et->Warn("Ignored non-standard Photoshop at $path"); return 1; } else { $et->Warn("Non-standard Photoshop at $path", 1); } } } SetByteOrder('MM'); # Photoshop is always big-endian $verbose and $et->VerboseDir('Photoshop', 0, $$dirInfo{DirLen}); # scan through resource blocks: # Format: 0) Type, 4 bytes - '8BIM' (or the rare 'PHUT', 'DCSR', 'AgHg' or 'MeSa') # 1) TagID,2 bytes # 2) Name, pascal string padded to even no. bytes # 3) Size, 4 bytes - N # 4) Data, N bytes while ($pos + 8 < $dirEnd) { my $type = substr($$dataPt, $pos, 4); my ($ttPtr, $extra, $val, $name); if ($type eq '8BIM') { $ttPtr = $tagTablePtr; } elsif ($type =~ /^(PHUT|DCSR|AgHg|MeSa)$/) { # (PHUT~ImageReady, MeSa~PhotoDeluxe) $ttPtr = GetTagTable('Image::ExifTool::Photoshop::Unknown'); } else { $type =~ s/([^\w])/sprintf("\\x%.2x",ord($1))/ge; $et->Warn(qq{Bad Photoshop IRB resource "$type"}); last; } my $tag = Get16u($dataPt, $pos + 4); $pos += 6; # point to start of name my $nameLen = Get8u($dataPt, $pos); my $namePos = ++$pos; # skip resource block name (pascal string, padded to an even # of bytes) $pos += $nameLen; ++$pos unless $nameLen & 0x01; if ($pos + 4 > $dirEnd) { $et->Warn("Bad Photoshop resource block"); last; } my $size = Get32u($dataPt, $pos); $pos += 4; if ($size + $pos > $dirEnd) { $et->Warn("Bad Photoshop resource data size $size"); last; } $success = 1; if ($nameLen) { $name = substr($$dataPt, $namePos, $nameLen); $extra = qq{, Name="$name"}; } else { $name = ''; } my $tagInfo = $et->GetTagInfo($ttPtr, $tag); # append resource name to value if requested (braced by "/#...#/") if ($tagInfo and defined $$tagInfo{SetResourceName} and $$tagInfo{SetResourceName} eq '1' and $name !~ m{/#}) { $val = substr($$dataPt, $pos, $size) . '/#' . $name . '#/'; } $et->HandleTag($ttPtr, $tag, $val, TagInfo => $tagInfo, Extra => $extra, DataPt => $dataPt, DataPos => $$dirInfo{DataPos}, Size => $size, Start => $pos, Parent => $$dirInfo{DirName}, ); $size += 1 if $size & 0x01; # size is padded to an even # bytes $pos += $size; } return $success; } #------------------------------------------------------------------------------ # extract information from Photoshop PSD file # Inputs: 0) ExifTool object reference, 1) dirInfo reference # Returns: 1 if this was a valid PSD file, -1 on write error sub ProcessPSD($$) { my ($et, $dirInfo) = @_; my $raf = $$dirInfo{RAF}; my $outfile = $$dirInfo{OutFile}; my ($data, $err, $tagTablePtr); $raf->Read($data, 30) == 30 or return 0; $data =~ /^8BPS\0([\x01\x02])/ or return 0; SetByteOrder('MM'); $et->SetFileType($1 eq "\x01" ? 'PSD' : 'PSB'); # set the FileType tag my %dirInfo = ( DataPt => \$data, DirStart => 0, DirName => 'Photoshop', ); my $len = Get32u(\$data, 26); if ($outfile) { Write($outfile, $data) or $err = 1; $raf->Read($data, $len) == $len or return -1; Write($outfile, $data) or $err = 1; # write color mode data # initialize map of where things are written $et->InitWriteDirs(\%psdMap); } else { # process the header $tagTablePtr = GetTagTable('Image::ExifTool::Photoshop::Header'); $dirInfo{DirLen} = 30; $et->ProcessDirectory(\%dirInfo, $tagTablePtr); $raf->Seek($len, 1) or $err = 1; # skip over color mode data } # read image resource section $raf->Read($data, 4) == 4 or $err = 1; $len = Get32u(\$data, 0); $raf->Read($data, $len) == $len or $err = 1; $tagTablePtr = GetTagTable('Image::ExifTool::Photoshop::Main'); $dirInfo{DirLen} = $len; my $rtnVal = 1; if ($outfile) { # rewrite IRB resources $data = WritePhotoshop($et, \%dirInfo, $tagTablePtr); if ($data) { $len = Set32u(length $data); Write($outfile, $len, $data) or $err = 1; # look for trailer and edit if necessary my $trailInfo = Image::ExifTool::IdentifyTrailer($raf); if ($trailInfo) { my $tbuf = ''; $$trailInfo{OutFile} = \$tbuf; # rewrite trailer(s) # rewrite all trailers to buffer if ($et->ProcessTrailers($trailInfo)) { my $copyBytes = $$trailInfo{DataPos} - $raf->Tell(); if ($copyBytes >= 0) { # copy remaining PSD file up to start of trailer while ($copyBytes) { my $n = ($copyBytes > 65536) ? 65536 : $copyBytes; $raf->Read($data, $n) == $n or $err = 1; Write($outfile, $data) or $err = 1; $copyBytes -= $n; } # write the trailer (or not) $et->WriteTrailerBuffer($trailInfo, $outfile) or $err = 1; } else { $et->Warn('Overlapping trailer'); undef $trailInfo; } } else { undef $trailInfo; } } unless ($trailInfo) { # copy over the rest of the file while ($raf->Read($data, 65536)) { Write($outfile, $data) or $err = 1; } } } else { $err = 1; } $rtnVal = -1 if $err; } elsif ($err) { $et->Warn('File format error'); } else { # read IRB resources ProcessPhotoshop($et, \%dirInfo, $tagTablePtr); # read layer and mask information section $dirInfo{RAF} = $raf; $tagTablePtr = GetTagTable('Image::ExifTool::Photoshop::Layers'); my $oldIndent = $$et{INDENT}; $$et{INDENT} .= '| '; if (ProcessLayersAndMask($et, \%dirInfo, $tagTablePtr) and # read compression mode from image data section $raf->Read($data,2) == 2) { my %dirInfo = ( DataPt => \$data, DataPos => $raf->Tell() - 2, ); $tagTablePtr = GetTagTable('Image::ExifTool::Photoshop::ImageData'); $et->ProcessDirectory(\%dirInfo, $tagTablePtr); } $$et{INDENT} = $oldIndent; # process trailers if they exist my $trailInfo = Image::ExifTool::IdentifyTrailer($raf); $et->ProcessTrailers($trailInfo) if $trailInfo; } return $rtnVal; } 1; # end __END__ =head1 NAME Image::ExifTool::Photoshop - Read/write Photoshop IRB meta information =head1 SYNOPSIS This module is loaded automatically by Image::ExifTool when required. =head1 DESCRIPTION Photoshop writes its own format of meta information called a Photoshop IRB resource which is located in the APP13 record of JPEG files. This module contains the definitions to read this information. =head1 NOTES Photoshop IRB blocks may have an associated resource name. These names are usually just an empty string, but if not empty they are displayed in the verbose level 2 (or greater) output. A special C flag may be set to '1' in the tag information hash to cause the resource name to be appended to the value when extracted. If this is done, the returned value has the form "VALUE/#NAME#/". When writing, the writer routine looks for this syntax (if C is defined), and and uses the embedded name to set the name of the new resource. This allows the resource names to be preserved when copying Photoshop information via user-defined tags. =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 =item L =item L =item L =item L =back =head1 SEE ALSO L, L, L =cut