| 1 | #------------------------------------------------------------------------------
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| 2 | # File: WritePostScript.pl
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| 3 | #
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| 4 | # Description: Write PostScript meta information
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| 5 | #
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| 6 | # Revisions: 03/03/2006 - P. Harvey Created
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| 7 | #
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| 8 | # References: (see references in PostScript.pm, plus:)
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| 9 | # 1) http://www.adobe.com/products/postscript/pdfs/PLRM.pdf
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| 10 | # 2) http://www-cdf.fnal.gov/offline/PostScript/PLRM2.pdf
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| 11 | # 3) http://partners.adobe.com/public/developer/en/acrobat/sdk/pdf/pdf_creation_apis_and_specs/pdfmarkReference.pdf
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| 12 | # 4) http://www.npes.org/standards/Tools/DCS20Spec.pdf
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| 13 | #
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| 14 | # Notes: (see NOTES in POD doc below)
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| 15 | #------------------------------------------------------------------------------
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| 16 |
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| 17 | package Image::ExifTool::PostScript;
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| 18 |
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| 19 | use strict;
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| 20 |
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| 21 | # Structure of a DSC PS/EPS document:
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| 22 | #
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| 23 | # %!PS-Adobe-3.0 [plus " EPSF-3.0" for EPS]
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| 24 | # <comments>
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| 25 | # %%EndComments [optional]
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| 26 | # %%BeginXxxx
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| 27 | # <stuff to ignore>
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| 28 | # %%EndXxxx
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| 29 | # %%BeginProlog
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| 30 | # <prolog stuff>
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| 31 | # %%EndProlog
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| 32 | # %%BeginSetup
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| 33 | # <setup stuff>
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| 34 | # %%EndSetup
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| 35 | # %ImageData x x x x [written by Photoshop]
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| 36 | # %BeginPhotoshop: xxxx
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| 37 | # <ascii-hex IRB information>
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| 38 | # %EndPhotosop
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| 39 | # %%BeginICCProfile: (name) <num> <type>
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| 40 | # <ICC Profile info>
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| 41 | # %%EndICCProfile
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| 42 | # %begin_xml_code
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| 43 | # <postscript code to define and read the XMP stream object>
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| 44 | # %begin_xml_packet: xxxx
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| 45 | # <XMP data>
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| 46 | # %end_xml_packet
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| 47 | # <postscript code to add XMP stream to dictionary>
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| 48 | # %end_xml_code
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| 49 | # %%Page: x x [PS only (optional?)]
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| 50 | # <graphics commands>
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| 51 | # %%PageTrailer
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| 52 | # %%Trailer
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| 53 | # <a bit more code to bracket EPS content for distiller>
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| 54 | # %%EOF
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| 55 |
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| 56 | # map of where information is stored in PS image
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| 57 | my %psMap = (
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| 58 | XMP => 'PostScript',
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| 59 | Photoshop => 'PostScript',
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| 60 | IPTC => 'Photoshop',
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| 61 | EXIFInfo => 'Photoshop',
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| 62 | IFD0 => 'EXIFInfo',
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| 63 | IFD1 => 'IFD0',
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| 64 | ICC_Profile => 'PostScript',
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| 65 | ExifIFD => 'IFD0',
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| 66 | GPS => 'IFD0',
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| 67 | SubIFD => 'IFD0',
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| 68 | GlobParamIFD => 'IFD0',
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| 69 | PrintIM => 'IFD0',
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| 70 | InteropIFD => 'ExifIFD',
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| 71 | MakerNotes => 'ExifIFD',
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| 72 | );
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| 73 |
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| 74 |
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| 75 | #------------------------------------------------------------------------------
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| 76 | # Write XMP directory to file, with begin/end tokens if necessary
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| 77 | # Inputs: 0) outfile ref, 1) flags hash ref, 2-N) data to write
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| 78 | # Returns: true on success
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| 79 | sub WriteXMPDir($$@)
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| 80 | {
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| 81 | my $outfile = shift;
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| 82 | my $flags = shift;
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| 83 | my $success = 1;
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| 84 | Write($outfile, "%begin_xml_code$/") or $success = 0 unless $$flags{WROTE_BEGIN};
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| 85 | Write($outfile, @_) or $success = 0;
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| 86 | Write($outfile, "%end_xml_code$/") or $success = 0 unless $$flags{WROTE_BEGIN};
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| 87 | return $success;
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| 88 | }
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| 89 |
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| 90 | #------------------------------------------------------------------------------
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| 91 | # Write a directory inside a PS document
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| 92 | # Inputs: 0) ExifTool object ref, 1) output file reference,
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| 93 | # 2) Directory name, 3) data reference, 4) flags hash ref
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| 94 | # Returns: 0=error, 1=nothing written, 2=dir written ok
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| 95 | sub WritePSDirectory($$$$$)
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| 96 | {
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| 97 | my ($et, $outfile, $dirName, $dataPt, $flags) = @_;
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| 98 | my $success = 2;
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| 99 | my $len = $dataPt ? length($$dataPt) : 0;
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| 100 | my $create = $len ? 0 : 1;
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| 101 | my %dirInfo = (
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| 102 | DataPt => $dataPt,
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| 103 | DataLen => $len,
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| 104 | DirStart => 0,
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| 105 | DirLen => $len,
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| 106 | DirName => $dirName,
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| 107 | Parent => 'PostScript',
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| 108 | );
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| 109 | # Note: $$flags{WROTE_BEGIN} may be 1 for XMP (it is always 0 for
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| 110 | # other dirs, but if 1, the begin/end markers were already written)
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| 111 | #
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| 112 | # prepare necessary postscript code to support embedded XMP
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| 113 | #
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| 114 | my ($beforeXMP, $afterXMP, $reportedLen);
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| 115 | if ($dirName eq 'XMP' and $len) {
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| 116 | # isolate the XMP
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| 117 | pos($$dataPt) = 0;
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| 118 | unless ($$dataPt =~ /(.*)(<\?xpacket begin=.{7,13}W5M0MpCehiHzreSzNTczkc9d)/sg) {
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| 119 | $et->Warn('No XMP packet start');
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| 120 | return WriteXMPDir($outfile, $flags, $$dataPt);
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| 121 | }
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| 122 | $beforeXMP = $1;
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| 123 | my $xmp = $2;
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| 124 | my $p1 = pos($$dataPt);
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| 125 | unless ($$dataPt =~ m{<\?xpacket end=.(w|r).\?>}sg) {
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| 126 | $et->Warn('No XMP packet end');
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| 127 | return WriteXMPDir($outfile, $flags, $$dataPt);
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| 128 | }
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| 129 | my $p2 = pos($$dataPt);
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| 130 | $xmp .= substr($$dataPt, $p1, $p2-$p1);
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| 131 | $afterXMP = substr($$dataPt, $p2);
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| 132 | # determine if we can adjust the XMP size
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| 133 | if ($beforeXMP =~ /%begin_xml_packet: (\d+)/s) {
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| 134 | $reportedLen = $1;
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| 135 | my @matches= ($beforeXMP =~ /\b$reportedLen\b/sg);
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| 136 | undef $reportedLen unless @matches == 2;
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| 137 | }
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| 138 | # must edit in place if we can't reliably change the XMP length
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| 139 | $dirInfo{InPlace} = 1 unless $reportedLen;
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| 140 | # process XMP only
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| 141 | $dirInfo{DataLen} = $dirInfo{DirLen} = length $xmp;
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| 142 | $dirInfo{DataPt} = \$xmp;
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| 143 | }
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| 144 | my $tagTablePtr = Image::ExifTool::GetTagTable("Image::ExifTool::${dirName}::Main");
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| 145 | my $val = $et->WriteDirectory(\%dirInfo, $tagTablePtr);
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| 146 | if (defined $val) {
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| 147 | $dataPt = \$val; # use modified directory
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| 148 | $len = length $val;
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| 149 | } elsif ($dirName eq 'XMP') {
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| 150 | return 1 unless $len;
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| 151 | # just write the original XMP
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| 152 | return WriteXMPDir($outfile, $flags, $$dataPt);
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| 153 | }
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| 154 | unless ($len) {
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| 155 | return 1 if $create or $dirName ne 'XMP'; # nothing to create
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| 156 | # it would be really difficult to delete the XMP,
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| 157 | # so instead we write a blank XMP record
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| 158 | $val = <<EMPTY_XMP;
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| 159 | <?xpacket begin='\xef\xbb\xbf' id='W5M0MpCehiHzreSzNTczkc9d'?>
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| 160 | <x:xmpmeta xmlns:x='adobe:ns:meta/' x:xmptk='Image::ExifTool $Image::ExifTool::VERSION'>
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| 161 | </x:xmpmeta>
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| 162 | EMPTY_XMP
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| 163 | $val .= ((' ' x 100) . "\n") x 24 unless $$et{OPTIONS}{Compact}{NoPadding};
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| 164 | $val .= q{<?xpacket end='w'?>};
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| 165 | $dataPt = \$val;
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| 166 | $len = length $val;
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| 167 | }
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| 168 | #
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| 169 | # write XMP directory
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| 170 | #
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| 171 | if ($dirName eq 'XMP') {
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| 172 | if ($create) {
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| 173 | # create necessary PS/EPS code to support XMP
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| 174 | $beforeXMP = <<HDR_END;
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| 175 | /pdfmark where {pop true} {false} ifelse
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| 176 | /currentdistillerparams where {pop currentdistillerparams
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| 177 | /CoreDistVersion get 5000 ge } {false} ifelse
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| 178 | and not {userdict /pdfmark /cleartomark load put} if
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| 179 | [/NamespacePush pdfmark
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| 180 | [/_objdef {exiftool_metadata_stream} /type /stream /OBJ pdfmark
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| 181 | [{exiftool_metadata_stream} 2 dict begin /Type /Metadata def
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| 182 | /Subtype /XML def currentdict end /PUT pdfmark
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| 183 | /MetadataString $len string def % exact length of metadata
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| 184 | /TempString 100 string def
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| 185 | /ConsumeMetadata {
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| 186 | currentfile TempString readline pop pop
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| 187 | currentfile MetadataString readstring pop pop
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| 188 | } bind def
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| 189 | ConsumeMetadata
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| 190 | %begin_xml_packet: $len
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| 191 | HDR_END
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| 192 | # note: use q() to get necessary linefeed before %end_xml_packet
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| 193 | $afterXMP = q(
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| 194 | %end_xml_packet
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| 195 | [{exiftool_metadata_stream} MetadataString /PUT pdfmark
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| 196 | );
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| 197 | if ($$flags{EPS}) {
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| 198 | $afterXMP .= <<EPS_AFTER;
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| 199 | [/Document 1 dict begin
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| 200 | /Metadata {exiftool_metadata_stream} def currentdict end /BDC pdfmark
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| 201 | [/NamespacePop pdfmark
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| 202 | EPS_AFTER
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| 203 | # write this at end of file
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| 204 | $$flags{TRAILER} = "[/EMC pdfmark$/";
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| 205 | } else { # PS
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| 206 | $afterXMP .= <<PS_AFTER;
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| 207 | [{Catalog} {exiftool_metadata_stream} /Metadata pdfmark
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| 208 | [/NamespacePop pdfmark
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| 209 | PS_AFTER
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| 210 | }
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| 211 | $beforeXMP =~ s{\n}{$/}sg; # use proper newline characters
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| 212 | $afterXMP =~ s{\n}{$/}sg;
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| 213 | } else {
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| 214 | # replace xmp size in PS code
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| 215 | $reportedLen and $beforeXMP =~ s/\b$reportedLen\b/$len/sg;
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| 216 | }
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| 217 | WriteXMPDir($outfile, $flags, $beforeXMP, $$dataPt, $afterXMP) or $success = 0;
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| 218 | #
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| 219 | # Write Photoshop or ICC_Profile directory
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| 220 | #
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| 221 | } elsif ($dirName eq 'Photoshop' or $dirName eq 'ICC_Profile') {
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| 222 | my ($startToken, $endToken);
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| 223 | if ($dirName eq 'Photoshop') {
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| 224 | $startToken = "%BeginPhotoshop: $len";
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| 225 | $endToken = '%EndPhotoshop';
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| 226 | } else {
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| 227 | $startToken = '%%BeginICCProfile: (Photoshop Profile) -1 Hex';
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| 228 | $endToken = '%%EndICCProfile';
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| 229 | }
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| 230 | Write($outfile, $startToken, $/) or $success = 0;
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| 231 | # write as an ASCII-hex comment
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| 232 | my $i;
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| 233 | my $wid = 32;
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| 234 | for ($i=0; $i<$len; $i+=$wid) {
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| 235 | $wid > $len-$i and $wid = $len-$i;
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| 236 | my $dat = substr($$dataPt, $i, $wid);
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| 237 | Write($outfile, "% ", uc(unpack('H*',$dat)), $/) or $success = 0;
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| 238 | }
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| 239 | Write($outfile, $endToken, $/) or $success = 0;
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| 240 | } else {
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| 241 | $et->Warn("Can't write PS directory $dirName");
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| 242 | }
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| 243 | undef $val;
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| 244 | return $success;
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| 245 | }
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| 246 |
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| 247 | #------------------------------------------------------------------------------
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| 248 | # Encode postscript tag/value
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| 249 | # Inputs: 0) tag ID, 1) value
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| 250 | # Returns: postscript comment
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| 251 | # - adds brackets, escapes special characters, and limits line length
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| 252 | sub EncodeTag($$)
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| 253 | {
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| 254 | my ($tag, $val) = @_;
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| 255 | unless ($val =~ /^\d+$/) {
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| 256 | $val =~ s/([()\\])/\\$1/g; # escape brackets and backslashes
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| 257 | $val =~ s/\n/\\n/g; # escape newlines
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| 258 | $val =~ s/\r/\\r/g; # escape carriage returns
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| 259 | $val =~ s/\t/\\t/g; # escape tabs
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| 260 | # use octal escape codes for other control characters
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| 261 | $val =~ s/([\x00-\x1f\x7f\xff])/sprintf("\\%.3o",ord($1))/ge;
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| 262 | $val = "($val)";
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| 263 | }
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| 264 | my $line = "%%$tag: $val";
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| 265 | # postscript line limit is 255 characters (but it seems that
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| 266 | # the limit may be 254 characters if the DOS CR/LF is used)
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| 267 | # --> split if necessary using continuation comment "%%+"
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| 268 | my $n;
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| 269 | for ($n=254; length($line)>$n; $n+=254+length($/)) {
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| 270 | substr($line, $n, 0) = "$/%%+";
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| 271 | }
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| 272 | return $line . $/;
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| 273 | }
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| 274 |
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| 275 | #------------------------------------------------------------------------------
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| 276 | # Write new tags information in comments section
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| 277 | # Inputs: 0) ExifTool object ref, 1) output file ref, 2) reference to new tag hash
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| 278 | # Returns: true on success
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| 279 | sub WriteNewTags($$$)
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| 280 | {
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| 281 | my ($et, $outfile, $newTags) = @_;
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| 282 | my $success = 1;
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| 283 | my $tag;
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| 284 |
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| 285 | # get XMP hint and remove from tags hash
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| 286 | my $xmpHint = $$newTags{XMP_HINT};
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| 287 | delete $$newTags{XMP_HINT};
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| 288 |
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| 289 | foreach $tag (sort keys %$newTags) {
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| 290 | my $tagInfo = $$newTags{$tag};
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| 291 | my $nvHash = $et->GetNewValueHash($tagInfo);
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| 292 | next unless $$nvHash{IsCreating};
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| 293 | my $val = $et->GetNewValue($nvHash);
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| 294 | $et->VerboseValue("+ PostScript:$$tagInfo{Name}", $val);
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| 295 | Write($outfile, EncodeTag($tag, $val)) or $success = 0;
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| 296 | ++$$et{CHANGED};
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| 297 | }
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| 298 | # write XMP hint if necessary
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| 299 | Write($outfile, "%ADO_ContainsXMP: MainFirst$/") or $success = 0 if $xmpHint;
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| 300 |
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| 301 | %$newTags = (); # all done with new tags
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| 302 | return $success;
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| 303 | }
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| 304 |
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| 305 | #------------------------------------------------------------------------------
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| 306 | # Write PS file
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| 307 | # Inputs: 0) ExifTool object reference, 1) source dirInfo reference
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| 308 | # Returns: 1 on success, 0 if this wasn't a valid PS file,
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| 309 | # or -1 if a write error occurred
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| 310 | sub WritePS($$)
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| 311 | {
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| 312 | my ($et, $dirInfo) = @_;
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| 313 | $et or return 1; # allow dummy access to autoload this package
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| 314 | my $tagTablePtr = Image::ExifTool::GetTagTable('Image::ExifTool::PostScript::Main');
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| 315 | my $raf = $$dirInfo{RAF};
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| 316 | my $outfile = $$dirInfo{OutFile};
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| 317 | my $verbose = $et->Options('Verbose');
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| 318 | my $out = $et->Options('TextOut');
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| 319 | my ($data, $buff, %flags, $err, $mode, $endToken);
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| 320 | my ($dos, $psStart, $psNewStart, $xmpHint, @lines);
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| 321 |
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| 322 | $raf->Read($data, 4) == 4 or return 0;
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| 323 | return 0 unless $data =~ /^(%!PS|%!Ad|\xc5\xd0\xd3\xc6)/;
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| 324 |
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| 325 | if ($data =~ /^%!Ad/) {
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| 326 | # I've seen PS files start with "%!Adobe-PS"...
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| 327 | return 0 unless $raf->Read($buff, 6) == 6 and $buff eq "obe-PS";
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| 328 | $data .= $buff;
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| 329 |
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| 330 | } elsif ($data =~ /^\xc5\xd0\xd3\xc6/) {
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| 331 | #
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| 332 | # process DOS binary PS files
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| 333 | #
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| 334 | # save DOS header then seek ahead and check PS header
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| 335 | $raf->Read($dos, 26) == 26 or return 0;
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| 336 | $dos = $data . $dos;
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| 337 | SetByteOrder('II');
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| 338 | $psStart = Get32u(\$dos, 4);
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| 339 | unless ($raf->Seek($psStart, 0) and
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| 340 | $raf->Read($data, 4) == 4 and $data eq '%!PS')
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| 341 | {
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| 342 | $et->Error('Invalid PS header');
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| 343 | return 1;
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| 344 | }
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| 345 | $$raf{PSEnd} = $psStart + Get32u(\$dos, 8);
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| 346 | my $base = Get32u(\$dos, 20);
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| 347 | Set16u(0xffff, \$dos, 28); # ignore checksum
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| 348 | if ($base) {
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| 349 | my %dirInfo = (
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| 350 | Parent => 'PS',
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| 351 | RAF => $raf,
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| 352 | Base => $base,
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| 353 | NoTiffEnd => 1, # no end-of-TIFF check
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| 354 | );
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| 355 | $buff = $et->WriteTIFF(\%dirInfo);
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| 356 | SetByteOrder('II'); # (WriteTIFF may change this)
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| 357 | if ($buff) {
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| 358 | $buff = substr($buff, $base); # remove header written by WriteTIFF()
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| 359 | } else {
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| 360 | # error rewriting TIFF, so just copy over original data
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| 361 | my $len = Get32u(\$dos, 24);
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| 362 | unless ($raf->Seek($base, 0) and $raf->Read($buff, $len) == $len) {
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| 363 | $et->Error('Error reading embedded TIFF');
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| 364 | return 1;
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| 365 | }
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| 366 | $et->Warn('Bad embedded TIFF');
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| 367 | }
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| 368 | Set32u(0, \$dos, 12); # zero metafile pointer
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| 369 | Set32u(0, \$dos, 16); # zero metafile length
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| 370 | Set32u(length($dos), \$dos, 20); # set TIFF pointer
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| 371 | Set32u(length($buff), \$dos, 24); # set TIFF length
|
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| 372 | } elsif (($base = Get32u(\$dos, 12)) != 0) {
|
|---|
| 373 | # copy over metafile section
|
|---|
| 374 | my $len = Get32u(\$dos, 16);
|
|---|
| 375 | unless ($raf->Seek($base, 0) and $raf->Read($buff, $len) == $len) {
|
|---|
| 376 | $et->Error('Error reading metafile section');
|
|---|
| 377 | return 1;
|
|---|
| 378 | }
|
|---|
| 379 | Set32u(length($dos), \$dos, 12); # set metafile pointer
|
|---|
| 380 | } else {
|
|---|
| 381 | $buff = '';
|
|---|
| 382 | }
|
|---|
| 383 | $psNewStart = length($dos) + length($buff);
|
|---|
| 384 | Set32u($psNewStart, \$dos, 4); # set pointer to start of PS
|
|---|
| 385 | Write($outfile, $dos, $buff) or $err = 1;
|
|---|
| 386 | $raf->Seek($psStart + 4, 0); # seek back to where we were
|
|---|
| 387 | }
|
|---|
| 388 | #
|
|---|
| 389 | # rewrite PostScript data
|
|---|
| 390 | #
|
|---|
| 391 | local $/ = GetInputRecordSeparator($raf);
|
|---|
| 392 | unless ($/ and $raf->ReadLine($buff)) {
|
|---|
| 393 | $et->Error('Invalid PostScript data');
|
|---|
| 394 | return 1;
|
|---|
| 395 | }
|
|---|
| 396 | $data .= $buff;
|
|---|
| 397 | unless ($data =~ /^%!PS-Adobe-3\.(\d+)\b/ and $1 < 2) {
|
|---|
| 398 | if ($et->Error("Document does not conform to DSC spec. Metadata may be unreadable by other apps", 2)) {
|
|---|
| 399 | return 1;
|
|---|
| 400 | }
|
|---|
| 401 | }
|
|---|
| 402 | my $psRev = $1; # save PS revision number (3.x)
|
|---|
| 403 | Write($outfile, $data) or $err = 1;
|
|---|
| 404 | $flags{EPS} = 1 if $data =~ /EPSF/;
|
|---|
| 405 |
|
|---|
| 406 | # get hash of new information keyed by tagID and directories to add/edit
|
|---|
| 407 | my $newTags = $et->GetNewTagInfoHash($tagTablePtr);
|
|---|
| 408 |
|
|---|
| 409 | # figure out which directories we need to write (PostScript takes priority)
|
|---|
| 410 | $et->InitWriteDirs(\%psMap, 'PostScript');
|
|---|
| 411 | my $addDirs = $$et{ADD_DIRS};
|
|---|
| 412 | my $editDirs = $$et{EDIT_DIRS};
|
|---|
| 413 | my %doneDir;
|
|---|
| 414 |
|
|---|
| 415 | # set XMP hint flag (1 for adding, 0 for deleting, undef for no change)
|
|---|
| 416 | $xmpHint = 1 if $$addDirs{XMP};
|
|---|
| 417 | $xmpHint = 0 if $$et{DEL_GROUP}{XMP};
|
|---|
| 418 | $$newTags{XMP_HINT} = $xmpHint if $xmpHint; # add special tag to newTags list
|
|---|
| 419 |
|
|---|
| 420 | for (;;) {
|
|---|
| 421 | @lines or GetNextLine($raf, \@lines) or last;
|
|---|
| 422 | $data = shift @lines;
|
|---|
| 423 | if ($endToken) {
|
|---|
| 424 | # look for end token
|
|---|
| 425 | if ($data =~ m/^$endToken\s*$/is) {
|
|---|
| 426 | undef $endToken;
|
|---|
| 427 | # found end: process this information
|
|---|
| 428 | if ($mode) {
|
|---|
| 429 | $doneDir{$mode} and $et->Error("Multiple $mode directories", 1);
|
|---|
| 430 | $doneDir{$mode} = 1;
|
|---|
| 431 | WritePSDirectory($et, $outfile, $mode, \$buff, \%flags) or $err = 1;
|
|---|
| 432 | # write end token if we wrote the begin token
|
|---|
| 433 | Write($outfile, $data) or $err = 1 if $flags{WROTE_BEGIN};
|
|---|
| 434 | undef $buff;
|
|---|
| 435 | } else {
|
|---|
| 436 | Write($outfile, $data) or $err = 1;
|
|---|
| 437 | }
|
|---|
| 438 | } else {
|
|---|
| 439 | # buffer data in current begin/end block
|
|---|
| 440 | if (not defined $mode) {
|
|---|
| 441 | # pick up XMP in unrecognized blocks for editing in place
|
|---|
| 442 | if ($data =~ /^<\?xpacket begin=.{7,13}W5M0MpCehiHzreSzNTczkc9d/ and
|
|---|
| 443 | $$editDirs{XMP})
|
|---|
| 444 | {
|
|---|
| 445 | $buff = $data;
|
|---|
| 446 | $mode = 'XMP';
|
|---|
| 447 | } else {
|
|---|
| 448 | Write($outfile, $data) or $err = 1;
|
|---|
| 449 | }
|
|---|
| 450 | } elsif ($mode eq 'XMP') {
|
|---|
| 451 | $buff .= $data;
|
|---|
| 452 | } else {
|
|---|
| 453 | # data is ASCII-hex encoded
|
|---|
| 454 | $data =~ tr/0-9A-Fa-f//dc; # remove all but hex characters
|
|---|
| 455 | $buff .= pack('H*', $data); # translate from hex
|
|---|
| 456 | }
|
|---|
| 457 | }
|
|---|
| 458 | next;
|
|---|
| 459 | } elsif ($data =~ m{^(%{1,2})(Begin)(?!Object:)(.*?)[:\x0d\x0a]}i) {
|
|---|
| 460 | # comments section is over... write any new tags now
|
|---|
| 461 | WriteNewTags($et, $outfile, $newTags) or $err = 1 if %$newTags;
|
|---|
| 462 | undef $xmpHint;
|
|---|
| 463 | # the beginning of a data block (can only write XMP and Photoshop)
|
|---|
| 464 | my %modeLookup = (
|
|---|
| 465 | _xml_code => 'XMP',
|
|---|
| 466 | photoshop => 'Photoshop',
|
|---|
| 467 | iccprofile => 'ICC_Profile',
|
|---|
| 468 | );
|
|---|
| 469 | $verbose > 1 and print $out "$2$3\n";
|
|---|
| 470 | $endToken = $1 . ($2 eq 'begin' ? 'end' : 'End') . $3;
|
|---|
| 471 | $mode = $modeLookup{lc($3)};
|
|---|
| 472 | if ($mode and $$editDirs{$mode}) {
|
|---|
| 473 | $buff = ''; # initialize buffer for this block
|
|---|
| 474 | $flags{WROTE_BEGIN} = 0;
|
|---|
| 475 | } else {
|
|---|
| 476 | undef $mode; # not editing this directory
|
|---|
| 477 | Write($outfile, $data) or $err = 1;
|
|---|
| 478 | $flags{WROTE_BEGIN} = 1;
|
|---|
| 479 | }
|
|---|
| 480 | next;
|
|---|
| 481 | } elsif ($data =~ /^%%(?!Page:|PlateFile:|BeginObject:)(\w+): ?(.*)/s) {
|
|---|
| 482 | # rewrite information from PostScript tags in comments
|
|---|
| 483 | my ($tag, $val) = ($1, $2);
|
|---|
| 484 | # handle Adobe Illustrator files specially
|
|---|
| 485 | # - EVENTUALLY IT WOULD BE BETTER TO FIND ANOTHER IDENTIFICATION METHOD
|
|---|
| 486 | # (because Illustrator doesn't care if the Creator is changed)
|
|---|
| 487 | if ($tag eq 'Creator' and $val =~ /^Adobe Illustrator/) {
|
|---|
| 488 | # disable writing XMP to PostScript-format Adobe Illustrator files
|
|---|
| 489 | # because it confuses Illustrator
|
|---|
| 490 | if ($$editDirs{XMP}) {
|
|---|
| 491 | $et->Warn("Can't write XMP to PostScript-format Illustrator files");
|
|---|
| 492 | # pretend like we wrote it already so we won't try to add it later
|
|---|
| 493 | $doneDir{XMP} = 1;
|
|---|
| 494 | }
|
|---|
| 495 | # don't allow "Creator" to be changed in Illustrator files
|
|---|
| 496 | # (we need it to be able to recognize these files)
|
|---|
| 497 | # --> find a better way to do this!
|
|---|
| 498 | if ($$newTags{$tag}) {
|
|---|
| 499 | $et->Warn("Can't change Postscript:Creator of Illustrator files");
|
|---|
| 500 | delete $$newTags{$tag};
|
|---|
| 501 | }
|
|---|
| 502 | }
|
|---|
| 503 | if ($$newTags{$tag}) {
|
|---|
| 504 | my $tagInfo = $$newTags{$tag};
|
|---|
| 505 | delete $$newTags{$tag}; # write it then forget it
|
|---|
| 506 | next unless ref $tagInfo;
|
|---|
| 507 | # decode comment string (reading continuation lines if necessary)
|
|---|
| 508 | $val = DecodeComment($val, $raf, \@lines, \$data);
|
|---|
| 509 | $val = join $et->Options('ListSep'), @$val if ref $val eq 'ARRAY';
|
|---|
| 510 | my $nvHash = $et->GetNewValueHash($tagInfo);
|
|---|
| 511 | if ($et->IsOverwriting($nvHash, $val)) {
|
|---|
| 512 | $et->VerboseValue("- PostScript:$$tagInfo{Name}", $val);
|
|---|
| 513 | $val = $et->GetNewValue($nvHash);
|
|---|
| 514 | ++$$et{CHANGED};
|
|---|
| 515 | next unless defined $val; # next if tag is being deleted
|
|---|
| 516 | $et->VerboseValue("+ PostScript:$$tagInfo{Name}", $val);
|
|---|
| 517 | $data = EncodeTag($tag, $val);
|
|---|
| 518 | }
|
|---|
| 519 | }
|
|---|
| 520 | # (note: Adobe InDesign doesn't put colon after %ADO_ContainsXMP -- doh!)
|
|---|
| 521 | } elsif (defined $xmpHint and $data =~ m{^%ADO_ContainsXMP:? ?(.+?)[\x0d\x0a]*$}s) {
|
|---|
| 522 | # change the XMP hint if necessary
|
|---|
| 523 | if ($xmpHint) {
|
|---|
| 524 | $data = "%ADO_ContainsXMP: MainFirst$/" if $1 eq 'NoMain';
|
|---|
| 525 | } else {
|
|---|
| 526 | $data = "%ADO_ContainsXMP: NoMain$/";
|
|---|
| 527 | }
|
|---|
| 528 | # delete XMP hint flags
|
|---|
| 529 | delete $$newTags{XMP_HINT};
|
|---|
| 530 | undef $xmpHint;
|
|---|
| 531 | } else {
|
|---|
| 532 | # look for end of comments section
|
|---|
| 533 | if (%$newTags and ($data !~ /^%\S/ or
|
|---|
| 534 | $data =~ /^%(%EndComments|%Page:|%PlateFile:|%BeginObject:|.*BeginLayer)/))
|
|---|
| 535 | {
|
|---|
| 536 | # write new tags at end of comments section
|
|---|
| 537 | WriteNewTags($et, $outfile, $newTags) or $err = 1;
|
|---|
| 538 | undef $xmpHint;
|
|---|
| 539 | }
|
|---|
| 540 | # look for start of drawing commands (AI uses "%AI5_BeginLayer",
|
|---|
| 541 | # and Helios uses "%%BeginObject:")
|
|---|
| 542 | if ($data =~ /^%(%Page:|%PlateFile:|%BeginObject:|.*BeginLayer)/ or
|
|---|
| 543 | $data !~ m{^(%.*|\s*)$}s)
|
|---|
| 544 | {
|
|---|
| 545 | # we have reached the first page or drawing command, so create necessary
|
|---|
| 546 | # directories and copy the rest of the file, then all done
|
|---|
| 547 | my $dir;
|
|---|
| 548 | my $plateFile = ($data =~ /^%%PlateFile:/);
|
|---|
| 549 | # create Photoshop first, then XMP if necessary
|
|---|
| 550 | foreach $dir (qw{Photoshop ICC_Profile XMP}) {
|
|---|
| 551 | next unless $$editDirs{$dir} and not $doneDir{$dir};
|
|---|
| 552 | if ($plateFile) {
|
|---|
| 553 | # PlateFile comments may contain offsets so we can't edit these files!
|
|---|
| 554 | $et->Warn("Can only edit PostScript information DCS Plate files");
|
|---|
| 555 | last;
|
|---|
| 556 | }
|
|---|
| 557 | next unless $$addDirs{$dir} or $dir eq 'XMP';
|
|---|
| 558 | $flags{WROTE_BEGIN} = 0;
|
|---|
| 559 | WritePSDirectory($et, $outfile, $dir, undef, \%flags) or $err = 1;
|
|---|
| 560 | $doneDir{$dir} = 1;
|
|---|
| 561 | }
|
|---|
| 562 | # copy rest of file
|
|---|
| 563 | if ($flags{TRAILER}) {
|
|---|
| 564 | # write trailer before %%EOF
|
|---|
| 565 | for (;;) {
|
|---|
| 566 | Write($outfile, $data) or $err = 1;
|
|---|
| 567 | if (@lines) {
|
|---|
| 568 | $data = shift @lines;
|
|---|
| 569 | } else {
|
|---|
| 570 | $raf->ReadLine($data) or undef($data), last;
|
|---|
| 571 | $dos and CheckPSEnd($raf, \$data);
|
|---|
| 572 | if ($data =~ /[\x0d\x0a]%%EOF\b/g) {
|
|---|
| 573 | # split data before "%%EOF"
|
|---|
| 574 | # (necessary if data contains other newline sequences)
|
|---|
| 575 | my $pos = pos($data) - 5;
|
|---|
| 576 | push @lines, substr($data, $pos);
|
|---|
| 577 | $data = substr($data, 0, $pos);
|
|---|
| 578 | }
|
|---|
| 579 | }
|
|---|
| 580 | last if $data =~ /^%%EOF\b/;
|
|---|
| 581 | }
|
|---|
| 582 | Write($outfile, $flags{TRAILER}) or $err = 1;
|
|---|
| 583 | }
|
|---|
| 584 | # simply copy the rest of the file if any data is left
|
|---|
| 585 | if (defined $data) {
|
|---|
| 586 | Write($outfile, $data) or $err = 1;
|
|---|
| 587 | Write($outfile, @lines) or $err = 1 if @lines;
|
|---|
| 588 | while ($raf->Read($data, 65536)) {
|
|---|
| 589 | $dos and CheckPSEnd($raf, \$data);
|
|---|
| 590 | Write($outfile, $data) or $err = 1;
|
|---|
| 591 | }
|
|---|
| 592 | }
|
|---|
| 593 | last; # all done!
|
|---|
| 594 | }
|
|---|
| 595 | }
|
|---|
| 596 | # write new information or copy existing line
|
|---|
| 597 | Write($outfile, $data) or $err = 1;
|
|---|
| 598 | }
|
|---|
| 599 | if ($dos and not $err) {
|
|---|
| 600 | # must go back and set length of PS section in DOS header (very dumb design)
|
|---|
| 601 | if (ref $outfile eq 'SCALAR') {
|
|---|
| 602 | Set32u(length($$outfile) - $psNewStart, $outfile, 8);
|
|---|
| 603 | } else {
|
|---|
| 604 | my $pos = tell $outfile;
|
|---|
| 605 | unless (seek($outfile, 8, 0) and
|
|---|
| 606 | print $outfile Set32u($pos - $psNewStart) and
|
|---|
| 607 | seek($outfile, $pos, 0))
|
|---|
| 608 | {
|
|---|
| 609 | $et->Error("Can't write DOS-style PS files in non-seekable stream");
|
|---|
| 610 | $err = 1;
|
|---|
| 611 | }
|
|---|
| 612 | }
|
|---|
| 613 | }
|
|---|
| 614 | # issue warning if we couldn't write any information
|
|---|
| 615 | unless ($err) {
|
|---|
| 616 | my (@notDone, $dir);
|
|---|
| 617 | delete $$newTags{XMP_HINT};
|
|---|
| 618 | push @notDone, 'PostScript' if %$newTags;
|
|---|
| 619 | foreach $dir (qw{Photoshop ICC_Profile XMP}) {
|
|---|
| 620 | push @notDone, $dir if $$editDirs{$dir} and not $doneDir{$dir} and
|
|---|
| 621 | not $$et{DEL_GROUP}{$dir};
|
|---|
| 622 | }
|
|---|
| 623 | @notDone and $et->Warn("Couldn't write ".join('/',@notDone).' information');
|
|---|
| 624 | }
|
|---|
| 625 | $endToken and $et->Error("File missing $endToken");
|
|---|
| 626 | return $err ? -1 : 1;
|
|---|
| 627 | }
|
|---|
| 628 |
|
|---|
| 629 |
|
|---|
| 630 | 1; # end
|
|---|
| 631 |
|
|---|
| 632 | __END__
|
|---|
| 633 |
|
|---|
| 634 | =head1 NAME
|
|---|
| 635 |
|
|---|
| 636 | Image::ExifTool::WritePostScript.pl - Write PostScript meta information
|
|---|
| 637 |
|
|---|
| 638 | =head1 SYNOPSIS
|
|---|
| 639 |
|
|---|
| 640 | This file is autoloaded by Image::ExifTool::PostScript.
|
|---|
| 641 |
|
|---|
| 642 | =head1 DESCRIPTION
|
|---|
| 643 |
|
|---|
| 644 | This file contains routines to write meta information in PostScript
|
|---|
| 645 | documents. Six forms of meta information may be written:
|
|---|
| 646 |
|
|---|
| 647 | 1) PostScript comments (Adobe DSC specification)
|
|---|
| 648 | 2) XMP information embedded in a document-level XMP stream
|
|---|
| 649 | 3) EXIF information embedded in a Photoshop record
|
|---|
| 650 | 4) IPTC information embedded in a PhotoShop record
|
|---|
| 651 | 5) ICC_Profile information embedded in an ICCProfile record
|
|---|
| 652 | 6) TIFF information embedded in DOS-style binary header
|
|---|
| 653 |
|
|---|
| 654 | =head1 NOTES
|
|---|
| 655 |
|
|---|
| 656 | Currently, information is written only in the outer-level document.
|
|---|
| 657 |
|
|---|
| 658 | Photoshop will discard meta information in a PostScript document if it has
|
|---|
| 659 | to rasterize the image, and it will rasterize anything that doesn't contain
|
|---|
| 660 | the Photoshop-specific 'ImageData' tag. So don't expect Photoshop to read
|
|---|
| 661 | any meta information added to EPS images that it didn't create.
|
|---|
| 662 |
|
|---|
| 663 | The following two acronyms may be confusing since they are so similar and
|
|---|
| 664 | have different meanings with respect to PostScript documents:
|
|---|
| 665 |
|
|---|
| 666 | DSC = Document Structuring Conventions
|
|---|
| 667 | DCS = Desktop Color Separation
|
|---|
| 668 |
|
|---|
| 669 | =head1 REFERENCES
|
|---|
| 670 |
|
|---|
| 671 | See references in L<PostScript.pm|Image::ExifTool::PostScript>, plus:
|
|---|
| 672 |
|
|---|
| 673 | =over 4
|
|---|
| 674 |
|
|---|
| 675 | =item L<http://www.adobe.com/products/postscript/pdfs/PLRM.pdf>
|
|---|
| 676 |
|
|---|
| 677 | =item L<http://www-cdf.fnal.gov/offline/PostScript/PLRM2.pdf>
|
|---|
| 678 |
|
|---|
| 679 | =item L<http://partners.adobe.com/public/developer/en/acrobat/sdk/pdf/pdf_creation_apis_and_specs/pdfmarkReference.pdf>
|
|---|
| 680 |
|
|---|
| 681 | =back
|
|---|
| 682 |
|
|---|
| 683 | =head1 ACKNOWLEDGEMENTS
|
|---|
| 684 |
|
|---|
| 685 | Thanks to Tim Kordick for his help testing the EPS writer.
|
|---|
| 686 |
|
|---|
| 687 | =head1 AUTHOR
|
|---|
| 688 |
|
|---|
| 689 | Copyright 2003-2021, Phil Harvey (philharvey66 at gmail.com)
|
|---|
| 690 |
|
|---|
| 691 | This library is free software; you can redistribute it and/or modify it
|
|---|
| 692 | under the same terms as Perl itself.
|
|---|
| 693 |
|
|---|
| 694 | =head1 SEE ALSO
|
|---|
| 695 |
|
|---|
| 696 | L<Image::ExifTool::PostScript(3pm)|Image::ExifTool::PostScript>,
|
|---|
| 697 | L<Image::ExifTool(3pm)|Image::ExifTool>
|
|---|
| 698 |
|
|---|
| 699 | =cut
|
|---|
