773 lines
29 KiB
Perl
773 lines
29 KiB
Perl
#------------------------------------------------------------------------------
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# File: WritePostScript.pl
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#
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# Description: Write PostScript meta information
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#
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# Revisions: 03/03/2006 - P. Harvey Created
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#
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# References: (see references in PostScript.pm, plus:)
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# 1) http://www.adobe.com/products/postscript/pdfs/PLRM.pdf
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# 2) http://www-cdf.fnal.gov/offline/PostScript/PLRM2.pdf
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# 3) http://partners.adobe.com/public/developer/en/acrobat/sdk/pdf/pdf_creation_apis_and_specs/pdfmarkReference.pdf
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# 4) http://www.npes.org/standards/Tools/DCS20Spec.pdf
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#
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# Notes: (see NOTES in POD doc below)
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#------------------------------------------------------------------------------
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package Image::ExifTool::PostScript;
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use strict;
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# Structure of a DSC PS/EPS document:
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#
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# %!PS-Adobe-3.0 [plus " EPSF-3.0" for EPS]
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# <comments>
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# %%EndComments [optional]
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# %%BeginXxxx
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# <stuff to ignore>
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# %%EndXxxx
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# %%BeginProlog
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# <prolog stuff>
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# %%EndProlog
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# %%BeginSetup
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# <setup stuff>
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# %%EndSetup
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# %ImageData x x x x [written by Photoshop]
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# %BeginPhotoshop: xxxx
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# <ascii-hex IRB information>
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# %EndPhotosop
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# %%BeginICCProfile: (name) <num> <type>
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# <ICC Profile info>
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# %%EndICCProfile
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# %begin_xml_code
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# <postscript code to define and read the XMP stream object>
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# %begin_xml_packet: xxxx
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# <XMP data>
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# %end_xml_packet
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# <postscript code to add XMP stream to dictionary>
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# %end_xml_code
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# %%Page: x x [PS only (optional?)]
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# <graphics commands>
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# %%PageTrailer
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# %%Trailer
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# <a bit more code to bracket EPS content for distiller>
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# %%EOF
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# map of where information is stored in PS image
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my %psMap = (
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XMP => 'PostScript',
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Photoshop => 'PostScript',
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IPTC => 'Photoshop',
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EXIFInfo => 'Photoshop',
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IFD0 => 'EXIFInfo',
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IFD1 => 'IFD0',
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ICC_Profile => 'PostScript',
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ExifIFD => 'IFD0',
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GPS => 'IFD0',
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SubIFD => 'IFD0',
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GlobParamIFD => 'IFD0',
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PrintIM => 'IFD0',
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InteropIFD => 'ExifIFD',
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MakerNotes => 'ExifIFD',
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);
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#------------------------------------------------------------------------------
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# Write XMP directory to file, with begin/end tokens if necessary
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# Inputs: 0) outfile ref, 1) flags hash ref, 2-N) data to write
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# Returns: true on success
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sub WriteXMPDir($$@)
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{
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my $outfile = shift;
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my $flags = shift;
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my $success = 1;
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Write($outfile, "%begin_xml_code$/") or $success = 0 unless $$flags{WROTE_BEGIN};
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Write($outfile, @_) or $success = 0;
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Write($outfile, "%end_xml_code$/") or $success = 0 unless $$flags{WROTE_BEGIN};
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return $success;
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}
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#------------------------------------------------------------------------------
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# Write a directory inside a PS document
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# Inputs: 0) ExifTool object ref, 1) output file reference,
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# 2) Directory name, 3) data reference, 4) flags hash ref
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# Returns: 0=error, 1=nothing written, 2=dir written ok
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sub WritePSDirectory($$$$$)
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{
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my ($et, $outfile, $dirName, $dataPt, $flags) = @_;
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my $success = 2;
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my $len = $dataPt ? length($$dataPt) : 0;
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my $create = $len ? 0 : 1;
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my %dirInfo = (
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DataPt => $dataPt,
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DataLen => $len,
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DirStart => 0,
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DirLen => $len,
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DirName => $dirName,
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Parent => 'PostScript',
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);
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# Note: $$flags{WROTE_BEGIN} may be 1 for XMP (it is always 0 for
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# other dirs, but if 1, the begin/end markers were already written)
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#
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# prepare necessary postscript code to support embedded XMP
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#
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my ($beforeXMP, $afterXMP, $reportedLen);
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if ($dirName eq 'XMP' and $len) {
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# isolate the XMP
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pos($$dataPt) = 0;
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unless ($$dataPt =~ /(.*)(<\?xpacket begin=.{7,13}W5M0MpCehiHzreSzNTczkc9d)/sg) {
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$et->Warn('No XMP packet start');
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return WriteXMPDir($outfile, $flags, $$dataPt);
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}
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$beforeXMP = $1;
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my $xmp = $2;
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my $p1 = pos($$dataPt);
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unless ($$dataPt =~ m{<\?xpacket end=.(w|r).\?>}sg) {
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$et->Warn('No XMP packet end');
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return WriteXMPDir($outfile, $flags, $$dataPt);
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}
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my $p2 = pos($$dataPt);
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$xmp .= substr($$dataPt, $p1, $p2-$p1);
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$afterXMP = substr($$dataPt, $p2);
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# determine if we can adjust the XMP size
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if ($beforeXMP =~ /%begin_xml_packet: (\d+)/s) {
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$reportedLen = $1;
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my @matches= ($beforeXMP =~ /\b$reportedLen\b/sg);
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undef $reportedLen unless @matches == 2;
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}
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# must edit in place if we can't reliably change the XMP length
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$dirInfo{InPlace} = 1 unless $reportedLen;
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# process XMP only
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$dirInfo{DataLen} = $dirInfo{DirLen} = length $xmp;
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$dirInfo{DataPt} = \$xmp;
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}
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my $tagTablePtr = Image::ExifTool::GetTagTable("Image::ExifTool::${dirName}::Main");
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my $val = $et->WriteDirectory(\%dirInfo, $tagTablePtr);
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if (defined $val) {
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$dataPt = \$val; # use modified directory
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$len = length $val;
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} elsif ($dirName eq 'XMP') {
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return 1 unless $len;
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# just write the original XMP
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return WriteXMPDir($outfile, $flags, $$dataPt);
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}
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unless ($len) {
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return 1 if $create or $dirName ne 'XMP'; # nothing to create
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# it would be really difficult to delete the XMP,
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# so instead we write a blank XMP record
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$val = <<EMPTY_XMP;
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<?xpacket begin='' id='W5M0MpCehiHzreSzNTczkc9d'?>
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<x:xmpmeta xmlns:x='adobe:ns:meta/' x:xmptk='Image::ExifTool $Image::ExifTool::VERSION'>
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</x:xmpmeta>
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EMPTY_XMP
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$val .= ((' ' x 100) . "\n") x 24 unless $et->Options('Compact');
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$val .= q{<?xpacket end='w'?>};
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$dataPt = \$val;
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$len = length $val;
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}
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#
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# write XMP directory
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#
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if ($dirName eq 'XMP') {
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if ($create) {
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# create necessary PS/EPS code to support XMP
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$beforeXMP = <<HDR_END;
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/pdfmark where {pop true} {false} ifelse
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/currentdistillerparams where {pop currentdistillerparams
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/CoreDistVersion get 5000 ge } {false} ifelse
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and not {userdict /pdfmark /cleartomark load put} if
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[/NamespacePush pdfmark
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[/_objdef {exiftool_metadata_stream} /type /stream /OBJ pdfmark
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[{exiftool_metadata_stream} 2 dict begin /Type /Metadata def
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/Subtype /XML def currentdict end /PUT pdfmark
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/MetadataString $len string def % exact length of metadata
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/TempString 100 string def
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/ConsumeMetadata {
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currentfile TempString readline pop pop
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currentfile MetadataString readstring pop pop
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} bind def
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ConsumeMetadata
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%begin_xml_packet: $len
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HDR_END
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# note: use q() to get necessary linefeed before %end_xml_packet
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$afterXMP = q(
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%end_xml_packet
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[{exiftool_metadata_stream} MetadataString /PUT pdfmark
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);
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if ($$flags{EPS}) {
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$afterXMP .= <<EPS_AFTER;
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[/Document 1 dict begin
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/Metadata {exiftool_metadata_stream} def currentdict end /BDC pdfmark
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[/NamespacePop pdfmark
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EPS_AFTER
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# write this at end of file
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$$flags{TRAILER} = "[/EMC pdfmark$/";
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} else { # PS
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$afterXMP .= <<PS_AFTER;
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[{Catalog} {exiftool_metadata_stream} /Metadata pdfmark
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[/NamespacePop pdfmark
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PS_AFTER
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}
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$beforeXMP =~ s{\n}{$/}sg; # use proper newline characters
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$afterXMP =~ s{\n}{$/}sg;
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} else {
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# replace xmp size in PS code
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$reportedLen and $beforeXMP =~ s/\b$reportedLen\b/$len/sg;
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}
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WriteXMPDir($outfile, $flags, $beforeXMP, $$dataPt, $afterXMP) or $success = 0;
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#
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# Write Photoshop or ICC_Profile directory
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#
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} elsif ($dirName eq 'Photoshop' or $dirName eq 'ICC_Profile') {
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my ($startToken, $endToken);
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if ($dirName eq 'Photoshop') {
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$startToken = "%BeginPhotoshop: $len";
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$endToken = '%EndPhotoshop';
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} else {
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$startToken = '%%BeginICCProfile: (Photoshop Profile) -1 Hex';
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$endToken = '%%EndICCProfile';
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}
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Write($outfile, $startToken, $/) or $success = 0;
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# write as an ASCII-hex comment
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my $i;
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my $wid = 32;
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for ($i=0; $i<$len; $i+=$wid) {
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$wid > $len-$i and $wid = $len-$i;
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my $dat = substr($$dataPt, $i, $wid);
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Write($outfile, "% ", uc(unpack('H*',$dat)), $/) or $success = 0;
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}
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Write($outfile, $endToken, $/) or $success = 0;
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} else {
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$et->Warn("Can't write PS directory $dirName");
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}
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undef $val;
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return $success;
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}
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#------------------------------------------------------------------------------
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# Encode postscript tag/value
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# Inputs: 0) tag ID, 1) value
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# Returns: postscript comment
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# - adds brackets, escapes special characters, and limits line length
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sub EncodeTag($$)
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{
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my ($tag, $val) = @_;
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unless ($val =~ /^\d+$/) {
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$val =~ s/([()\\])/\\$1/g; # escape brackets and backslashes
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$val =~ s/\n/\\n/g; # escape newlines
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$val =~ s/\r/\\r/g; # escape carriage returns
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$val =~ s/\t/\\t/g; # escape tabs
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# use octal escape codes for other control characters
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$val =~ s/([\x00-\x1f\x7f\xff])/sprintf("\\%.3o",ord($1))/ge;
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$val = "($val)";
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}
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my $line = "%%$tag: $val";
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# postscript line limit is 255 characters (but it seems that
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# the limit may be 254 characters if the DOS CR/LF is used)
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# --> split if necessary using continuation comment "%%+"
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my $n;
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for ($n=254; length($line)>$n; $n+=254+length($/)) {
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substr($line, $n, 0) = "$/%%+";
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}
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return $line . $/;
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}
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#------------------------------------------------------------------------------
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# Write new tags information in comments section
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# Inputs: 0) ExifTool object ref, 1) output file ref, 2) reference to new tag hash
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# Returns: true on success
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sub WriteNewTags($$$)
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{
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my ($et, $outfile, $newTags) = @_;
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my $success = 1;
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my $tag;
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# get XMP hint and remove from tags hash
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my $xmpHint = $$newTags{XMP_HINT};
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delete $$newTags{XMP_HINT};
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foreach $tag (sort keys %$newTags) {
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my $tagInfo = $$newTags{$tag};
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my $nvHash = $et->GetNewValueHash($tagInfo);
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next unless $$nvHash{IsCreating};
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my $val = $et->GetNewValue($nvHash);
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$et->VerboseValue("+ PostScript:$$tagInfo{Name}", $val);
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Write($outfile, EncodeTag($tag, $val)) or $success = 0;
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++$$et{CHANGED};
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}
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# write XMP hint if necessary
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Write($outfile, "%ADO_ContainsXMP: MainFirst$/") or $success = 0 if $xmpHint;
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%$newTags = (); # all done with new tags
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return $success;
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}
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#------------------------------------------------------------------------------
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# check to be sure we haven't read past end of PS data in DOS-style file
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# Inputs: 0) RAF ref, 1) pointer to end of PS, 2) data
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# - modifies data and sets RAF to EOF if end of PS is reached
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sub CheckPSEnd($$$)
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{
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my $pos = $_[0]->Tell();
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if ($pos >= $_[1]) {
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$_[0]->Seek(0, 2); # seek to end of file so we can't read any more
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$_[2] = substr($_[2], 0, length($_[2]) - $pos + $_[1]) if $pos > $_[1];
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}
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}
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#------------------------------------------------------------------------------
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# Split into lines ending in any CR, LF or CR+LF combination
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# (this is annoying, and could be avoided if EPS files didn't mix linefeeds!)
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# Inputs: 0) data pointer, 1) reference to lines array
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# Notes: Updates data to contain next line and fills list with remaining lines
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sub SplitLine($$)
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{
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my ($dataPt, $lines) = @_;
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for (;;) {
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my $endl;
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# find the position of the first LF (\x0a)
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$endl = pos($$dataPt), pos($$dataPt) = 0 if $$dataPt =~ /\x0a/g;
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if ($$dataPt =~ /\x0d/g) { # find the first CR (\x0d)
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if (defined $endl) {
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# (remember, CR+LF is a DOS newline...)
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$endl = pos($$dataPt) if pos($$dataPt) < $endl - 1;
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} else {
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$endl = pos($$dataPt);
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}
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} elsif (not defined $endl) {
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push @$lines, $$dataPt;
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last;
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}
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# split into separate lines
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if (length $$dataPt == $endl) {
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push @$lines, $$dataPt;
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last;
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} else {
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push @$lines, substr($$dataPt, 0, $endl);
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$$dataPt = substr($$dataPt, $endl);
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}
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}
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$$dataPt = shift @$lines; # set $$dataPt to first line
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}
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#------------------------------------------------------------------------------
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# Write PS file
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# Inputs: 0) ExifTool object reference, 1) source dirInfo reference
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# Returns: 1 on success, 0 if this wasn't a valid PS file,
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# or -1 if a write error occurred
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sub WritePS($$)
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{
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my ($et, $dirInfo) = @_;
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$et or return 1; # allow dummy access to autoload this package
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my $tagTablePtr = Image::ExifTool::GetTagTable('Image::ExifTool::PostScript::Main');
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my $raf = $$dirInfo{RAF};
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my $outfile = $$dirInfo{OutFile};
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my $verbose = $et->Options('Verbose');
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my $out = $et->Options('TextOut');
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my ($data, $buff, %flags, $err, $mode, $endToken);
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my ($dos, $psStart, $psEnd, $psNewStart, $xmpHint);
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$raf->Read($data, 4) == 4 or return 0;
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return 0 unless $data =~ /^(%!PS|%!Ad|\xc5\xd0\xd3\xc6)/;
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if ($data =~ /^%!Ad/) {
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# I've seen PS files start with "%!Adobe-PS"...
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return 0 unless $raf->Read($buff, 6) == 6 and $buff eq "obe-PS";
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$data .= $buff;
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} elsif ($data =~ /^\xc5\xd0\xd3\xc6/) {
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#
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# process DOS binary PS files
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#
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# save DOS header then seek ahead and check PS header
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$raf->Read($dos, 26) == 26 or return 0;
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$dos = $data . $dos;
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SetByteOrder('II');
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$psStart = Get32u(\$dos, 4);
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unless ($raf->Seek($psStart, 0) and
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$raf->Read($data, 4) == 4 and $data eq '%!PS')
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{
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$et->Error('Invalid PS header');
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return 1;
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}
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$psEnd = $psStart + Get32u(\$dos, 8);
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my $base = Get32u(\$dos, 20);
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Set16u(0xffff, \$dos, 28); # ignore checksum
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if ($base) {
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my %dirInfo = (
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Parent => 'PS',
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RAF => $raf,
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Base => $base,
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NoTiffEnd => 1, # no end-of-TIFF check
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);
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$buff = $et->WriteTIFF(\%dirInfo);
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SetByteOrder('II'); # (WriteTIFF may change this)
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if ($buff) {
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$buff = substr($buff, $base); # remove header written by WriteTIFF()
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} else {
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# error rewriting TIFF, so just copy over original data
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my $len = Get32u(\$dos, 24);
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unless ($raf->Seek($base, 0) and $raf->Read($buff, $len) == $len) {
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$et->Error('Error reading embedded TIFF');
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return 1;
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}
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$et->Warn('Bad embedded TIFF');
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}
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Set32u(0, \$dos, 12); # zero metafile pointer
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Set32u(0, \$dos, 16); # zero metafile length
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Set32u(length($dos), \$dos, 20); # set TIFF pointer
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Set32u(length($buff), \$dos, 24); # set TIFF length
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} elsif (($base = Get32u(\$dos, 12)) != 0) {
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# copy over metafile section
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my $len = Get32u(\$dos, 16);
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unless ($raf->Seek($base, 0) and $raf->Read($buff, $len) == $len) {
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$et->Error('Error reading metafile section');
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return 1;
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}
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Set32u(length($dos), \$dos, 12); # set metafile pointer
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} else {
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$buff = '';
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}
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$psNewStart = length($dos) + length($buff);
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Set32u($psNewStart, \$dos, 4); # set pointer to start of PS
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Write($outfile, $dos, $buff) or $err = 1;
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$raf->Seek($psStart + 4, 0); # seek back to where we were
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}
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#
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# rewrite PostScript data
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#
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local $/ = GetInputRecordSeparator($raf);
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unless ($/ and $raf->ReadLine($buff)) {
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$et->Error('Invalid PostScript data');
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return 1;
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}
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$data .= $buff;
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unless ($data =~ /^%!PS-Adobe-3\.(\d+)\b/ and $1 < 2) {
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if ($et->Error("Document does not conform to DSC spec. Metadata may be unreadable by other apps", 2)) {
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return 1;
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}
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}
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my $psRev = $1; # save PS revision number (3.x)
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Write($outfile, $data) or $err = 1;
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$flags{EPS} = 1 if $data =~ /EPSF/;
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# get hash of new information keyed by tagID and directories to add/edit
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my $newTags = $et->GetNewTagInfoHash($tagTablePtr);
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|
||
# figure out which directories we need to write (PostScript takes priority)
|
||
$et->InitWriteDirs(\%psMap, 'PostScript');
|
||
my $addDirs = $$et{ADD_DIRS};
|
||
my $editDirs = $$et{EDIT_DIRS};
|
||
my %doneDir;
|
||
|
||
# set XMP hint flag (1 for adding, 0 for deleting, undef for no change)
|
||
$xmpHint = 1 if $$addDirs{XMP};
|
||
$xmpHint = 0 if $$et{DEL_GROUP}{XMP};
|
||
$$newTags{XMP_HINT} = $xmpHint if $xmpHint; # add special tag to newTags list
|
||
|
||
my (@lines, $changedNL);
|
||
my $altnl = ($/ eq "\x0d") ? "\x0a" : "\x0d";
|
||
|
||
for (;;) {
|
||
if (@lines) {
|
||
$data = shift @lines;
|
||
} else {
|
||
$raf->ReadLine($data) or last;
|
||
$dos and CheckPSEnd($raf, $psEnd, $data);
|
||
# split line if it contains other newline sequences
|
||
if ($data =~ /$altnl/) {
|
||
if (length($data) > 500000 and IsPC()) {
|
||
# patch for Windows memory problem
|
||
unless ($changedNL) {
|
||
$changedNL = 1;
|
||
my $t = $/;
|
||
$/ = $altnl;
|
||
$altnl = $t;
|
||
$raf->Seek(-length($data), 1);
|
||
next;
|
||
}
|
||
} else {
|
||
# split into separate lines
|
||
SplitLine(\$data, \@lines);
|
||
}
|
||
}
|
||
}
|
||
undef $changedNL;
|
||
if ($endToken) {
|
||
# look for end token
|
||
if ($data =~ m/^$endToken\s*$/is) {
|
||
undef $endToken;
|
||
# found end: process this information
|
||
if ($mode) {
|
||
$doneDir{$mode} and $et->Error("Multiple $mode directories", 1);
|
||
$doneDir{$mode} = 1;
|
||
WritePSDirectory($et, $outfile, $mode, \$buff, \%flags) or $err = 1;
|
||
# write end token if we wrote the begin token
|
||
Write($outfile, $data) or $err = 1 if $flags{WROTE_BEGIN};
|
||
undef $buff;
|
||
} else {
|
||
Write($outfile, $data) or $err = 1;
|
||
}
|
||
} else {
|
||
# buffer data in current begin/end block
|
||
if (not defined $mode) {
|
||
# pick up XMP in unrecognized blocks for editing in place
|
||
if ($data =~ /^<\?xpacket begin=.{7,13}W5M0MpCehiHzreSzNTczkc9d/ and
|
||
$$editDirs{XMP})
|
||
{
|
||
$buff = $data;
|
||
$mode = 'XMP';
|
||
} else {
|
||
Write($outfile, $data) or $err = 1;
|
||
}
|
||
} elsif ($mode eq 'XMP') {
|
||
$buff .= $data;
|
||
} else {
|
||
# data is ASCII-hex encoded
|
||
$data =~ tr/0-9A-Fa-f//dc; # remove all but hex characters
|
||
$buff .= pack('H*', $data); # translate from hex
|
||
}
|
||
}
|
||
next;
|
||
} elsif ($data =~ m{^(%{1,2})(Begin)(?!Object:)(.*?)[:\x0d\x0a]}i) {
|
||
# comments section is over... write any new tags now
|
||
WriteNewTags($et, $outfile, $newTags) or $err = 1 if %$newTags;
|
||
undef $xmpHint;
|
||
# the beginning of a data block (can only write XMP and Photoshop)
|
||
my %modeLookup = (
|
||
_xml_code => 'XMP',
|
||
photoshop => 'Photoshop',
|
||
iccprofile => 'ICC_Profile',
|
||
);
|
||
$verbose > 1 and print $out "$2$3\n";
|
||
$endToken = $1 . ($2 eq 'begin' ? 'end' : 'End') . $3;
|
||
$mode = $modeLookup{lc($3)};
|
||
if ($mode and $$editDirs{$mode}) {
|
||
$buff = ''; # initialize buffer for this block
|
||
$flags{WROTE_BEGIN} = 0;
|
||
} else {
|
||
undef $mode; # not editing this directory
|
||
Write($outfile, $data) or $err = 1;
|
||
$flags{WROTE_BEGIN} = 1;
|
||
}
|
||
next;
|
||
} elsif ($data =~ /^%%(?!Page:|PlateFile:|BeginObject:)(\w+): ?(.*)/s) {
|
||
# rewrite information from PostScript tags in comments
|
||
my ($tag, $val) = ($1, $2);
|
||
# handle Adobe Illustrator files specially
|
||
# - EVENTUALLY IT WOULD BE BETTER TO FIND ANOTHER IDENTIFICATION METHOD
|
||
# (because Illustrator doesn't care if the Creator is changed)
|
||
if ($tag eq 'Creator' and $val =~ /^Adobe Illustrator/) {
|
||
# disable writing XMP to PostScript-format Adobe Illustrator files
|
||
# because it confuses Illustrator
|
||
if ($$editDirs{XMP}) {
|
||
$et->Warn("Can't write XMP to PostScript-format Illustrator files");
|
||
# pretend like we wrote it already so we won't try to add it later
|
||
$doneDir{XMP} = 1;
|
||
}
|
||
# don't allow "Creator" to be changed in Illustrator files
|
||
# (we need it to be able to recognize these files)
|
||
# --> find a better way to do this!
|
||
if ($$newTags{$tag}) {
|
||
$et->Warn("Can't change Postscript:Creator of Illustrator files");
|
||
delete $$newTags{$tag};
|
||
}
|
||
}
|
||
if ($$newTags{$tag}) {
|
||
my $tagInfo = $$newTags{$tag};
|
||
delete $$newTags{$tag}; # write it then forget it
|
||
next unless ref $tagInfo;
|
||
# decode comment string (reading continuation lines if necessary)
|
||
$val = DecodeComment($val, $raf, \@lines, \$data);
|
||
$val = join $et->Options('ListSep'), @$val if ref $val eq 'ARRAY';
|
||
my $nvHash = $et->GetNewValueHash($tagInfo);
|
||
if ($et->IsOverwriting($nvHash, $val)) {
|
||
$et->VerboseValue("- PostScript:$$tagInfo{Name}", $val);
|
||
$val = $et->GetNewValue($nvHash);
|
||
++$$et{CHANGED};
|
||
next unless defined $val; # next if tag is being deleted
|
||
$et->VerboseValue("+ PostScript:$$tagInfo{Name}", $val);
|
||
$data = EncodeTag($tag, $val);
|
||
}
|
||
}
|
||
# (note: Adobe InDesign doesn't put colon after %ADO_ContainsXMP -- doh!)
|
||
} elsif (defined $xmpHint and $data =~ m{^%ADO_ContainsXMP:? ?(.+?)[\x0d\x0a]*$}s) {
|
||
# change the XMP hint if necessary
|
||
if ($xmpHint) {
|
||
$data = "%ADO_ContainsXMP: MainFirst$/" if $1 eq 'NoMain';
|
||
} else {
|
||
$data = "%ADO_ContainsXMP: NoMain$/";
|
||
}
|
||
# delete XMP hint flags
|
||
delete $$newTags{XMP_HINT};
|
||
undef $xmpHint;
|
||
} else {
|
||
# look for end of comments section
|
||
if (%$newTags and ($data !~ /^%\S/ or
|
||
$data =~ /^%(%EndComments|%Page:|%PlateFile:|%BeginObject:|.*BeginLayer)/))
|
||
{
|
||
# write new tags at end of comments section
|
||
WriteNewTags($et, $outfile, $newTags) or $err = 1;
|
||
undef $xmpHint;
|
||
}
|
||
# look for start of drawing commands (AI uses "%AI5_BeginLayer",
|
||
# and Helios uses "%%BeginObject:")
|
||
if ($data =~ /^%(%Page:|%PlateFile:|%BeginObject:|.*BeginLayer)/ or
|
||
$data !~ m{^(%.*|\s*)$}s)
|
||
{
|
||
# we have reached the first page or drawing command, so create necessary
|
||
# directories and copy the rest of the file, then all done
|
||
my $dir;
|
||
my $plateFile = ($data =~ /^%%PlateFile:/);
|
||
# create Photoshop first, then XMP if necessary
|
||
foreach $dir (qw{Photoshop ICC_Profile XMP}) {
|
||
next unless $$editDirs{$dir} and not $doneDir{$dir};
|
||
if ($plateFile) {
|
||
# PlateFile comments may contain offsets so we can't edit these files!
|
||
$et->Warn("Can only edit PostScript information DCS Plate files");
|
||
last;
|
||
}
|
||
next unless $$addDirs{$dir} or $dir eq 'XMP';
|
||
$flags{WROTE_BEGIN} = 0;
|
||
WritePSDirectory($et, $outfile, $dir, undef, \%flags) or $err = 1;
|
||
$doneDir{$dir} = 1;
|
||
}
|
||
# copy rest of file
|
||
if ($flags{TRAILER}) {
|
||
# write trailer before %%EOF
|
||
for (;;) {
|
||
Write($outfile, $data) or $err = 1;
|
||
if (@lines) {
|
||
$data = shift @lines;
|
||
} else {
|
||
$raf->ReadLine($data) or undef($data), last;
|
||
$dos and CheckPSEnd($raf, $psEnd, $data);
|
||
if ($data =~ /[\x0d\x0a]%%EOF\b/g) {
|
||
# split data before "%%EOF"
|
||
# (necessary if data contains other newline sequences)
|
||
my $pos = pos($data) - 5;
|
||
push @lines, substr($data, $pos);
|
||
$data = substr($data, 0, $pos);
|
||
}
|
||
}
|
||
last if $data =~ /^%%EOF\b/;
|
||
}
|
||
Write($outfile, $flags{TRAILER}) or $err = 1;
|
||
}
|
||
# simply copy the rest of the file if any data is left
|
||
if (defined $data) {
|
||
Write($outfile, $data) or $err = 1;
|
||
Write($outfile, @lines) or $err = 1 if @lines;
|
||
while ($raf->Read($data, 65536)) {
|
||
$dos and CheckPSEnd($raf, $psEnd, $data);
|
||
Write($outfile, $data) or $err = 1;
|
||
}
|
||
}
|
||
last; # all done!
|
||
}
|
||
}
|
||
# write new information or copy existing line
|
||
Write($outfile, $data) or $err = 1;
|
||
}
|
||
if ($dos and not $err) {
|
||
# must go back and set length of PS section in DOS header (very dumb design)
|
||
if (ref $outfile eq 'SCALAR') {
|
||
Set32u(length($$outfile) - $psNewStart, $outfile, 8);
|
||
} else {
|
||
my $pos = tell $outfile;
|
||
unless (seek($outfile, 8, 0) and
|
||
print $outfile Set32u($pos - $psNewStart) and
|
||
seek($outfile, $pos, 0))
|
||
{
|
||
$et->Error("Can't write DOS-style PS files in non-seekable stream");
|
||
$err = 1;
|
||
}
|
||
}
|
||
}
|
||
# issue warning if we couldn't write any information
|
||
unless ($err) {
|
||
my (@notDone, $dir);
|
||
delete $$newTags{XMP_HINT};
|
||
push @notDone, 'PostScript' if %$newTags;
|
||
foreach $dir (qw{Photoshop ICC_Profile XMP}) {
|
||
push @notDone, $dir if $$editDirs{$dir} and not $doneDir{$dir} and
|
||
not $$et{DEL_GROUP}{$dir};
|
||
}
|
||
@notDone and $et->Warn("Couldn't write ".join('/',@notDone).' information');
|
||
}
|
||
$endToken and $et->Error("File missing $endToken");
|
||
return $err ? -1 : 1;
|
||
}
|
||
|
||
|
||
1; # end
|
||
|
||
__END__
|
||
|
||
=head1 NAME
|
||
|
||
Image::ExifTool::WritePostScript.pl - Write PostScript meta information
|
||
|
||
=head1 SYNOPSIS
|
||
|
||
This file is autoloaded by Image::ExifTool::PostScript.
|
||
|
||
=head1 DESCRIPTION
|
||
|
||
This file contains routines to write meta information in PostScript
|
||
documents. Six forms of meta information may be written:
|
||
|
||
1) PostScript comments (Adobe DSC specification)
|
||
2) XMP information embedded in a document-level XMP stream
|
||
3) EXIF information embedded in a Photoshop record
|
||
4) IPTC information embedded in a PhotoShop record
|
||
5) ICC_Profile information embedded in an ICCProfile record
|
||
6) TIFF information embedded in DOS-style binary header
|
||
|
||
=head1 NOTES
|
||
|
||
Currently, information is written only in the outer-level document.
|
||
|
||
Photoshop will discard meta information in a PostScript document if it has
|
||
to rasterize the image, and it will rasterize anything that doesn't contain
|
||
the Photoshop-specific 'ImageData' tag. So don't expect Photoshop to read
|
||
any meta information added to EPS images that it didn't create.
|
||
|
||
The following two acronyms may be confusing since they are so similar and
|
||
have different meanings with respect to PostScript documents:
|
||
|
||
DSC = Document Structuring Conventions
|
||
DCS = Desktop Color Separation
|
||
|
||
=head1 REFERENCES
|
||
|
||
See references in L<PostScript.pm|Image::ExifTool::PostScript>, plus:
|
||
|
||
=over 4
|
||
|
||
=item L<http://www.adobe.com/products/postscript/pdfs/PLRM.pdf>
|
||
|
||
=item L<http://www-cdf.fnal.gov/offline/PostScript/PLRM2.pdf>
|
||
|
||
=item L<http://partners.adobe.com/public/developer/en/acrobat/sdk/pdf/pdf_creation_apis_and_specs/pdfmarkReference.pdf>
|
||
|
||
=back
|
||
|
||
=head1 ACKNOWLEDGEMENTS
|
||
|
||
Thanks to Tim Kordick for his help testing the EPS writer.
|
||
|
||
=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 SEE ALSO
|
||
|
||
L<Image::ExifTool::PostScript(3pm)|Image::ExifTool::PostScript>,
|
||
L<Image::ExifTool(3pm)|Image::ExifTool>
|
||
|
||
=cut
|