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@ -302,106 +302,6 @@ namespace {
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}
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}
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}
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}
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//! Find removable XMP embeddings
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static std::vector<std::pair<size_t, size_t> > findRemovableEmbeddings(const byte* data, size_t posStart, size_t posEof, size_t posEndPageSetup,
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size_t xmpPos, size_t xmpSize, bool write)
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{
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std::vector<std::pair<size_t, size_t> > removableEmbeddings;
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std::string line;
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size_t pos;
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// check after XMP
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pos = xmpPos + xmpSize;
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pos = readLine(line, data, pos, posEof);
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if (line != "") return removableEmbeddings;
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#ifdef DEBUG
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EXV_DEBUG << "findRemovableEmbeddings: Found empty line after XMP\n";
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#endif
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pos = readLine(line, data, pos, posEof);
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if (line != "%end_xml_packet") return removableEmbeddings;
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#ifdef DEBUG
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EXV_DEBUG << "findRemovableEmbeddings: Found %end_xml_packet\n";
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#endif
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size_t posEmbeddingEnd = 0;
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for (int i = 0; i < 32; i++) {
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pos = readLine(line, data, pos, posEof);
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if (line == "%end_xml_code") {
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posEmbeddingEnd = pos;
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break;
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}
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}
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if (posEmbeddingEnd == 0) return removableEmbeddings;
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#ifdef DEBUG
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EXV_DEBUG << "findRemovableEmbeddings: Found %end_xml_code\n";
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#endif
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// check before XMP
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pos = xmpPos;
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pos = readPrevLine(line, data, pos, posEof);
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if (!startsWith(line, "%begin_xml_packet: ")) return removableEmbeddings;
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#ifdef DEBUG
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EXV_DEBUG << "findRemovableEmbeddings: Found %begin_xml_packet: ...\n";
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#endif
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size_t posEmbeddingStart = posEof;
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for (int i = 0; i < 32; i++) {
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pos = readPrevLine(line, data, pos, posEof);
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if (line == "%begin_xml_code") {
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posEmbeddingStart = pos;
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break;
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}
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}
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if (posEmbeddingStart == posEof) return removableEmbeddings;
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#ifdef DEBUG
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EXV_DEBUG << "findRemovableEmbeddings: Found %begin_xml_code\n";
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#endif
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// check at EOF
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pos = posEof;
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pos = readPrevLine(line, data, pos, posEof);
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if (line == "[/EMC pdfmark") {
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// Exiftool style
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#ifdef DEBUG
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EXV_DEBUG << "findRemovableEmbeddings: Found [/EMC pdfmark\n";
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#endif
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} else if (line == "[/NamespacePop pdfmark") {
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// Photoshop style
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#ifdef DEBUG
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EXV_DEBUG << "findRemovableEmbeddings: Found /NamespacePop pdfmark\n";
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#endif
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pos = readPrevLine(line, data, pos, posEof);
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if (line != "[{nextImage} 1 dict begin /Metadata {photoshop_metadata_stream} def currentdict end /PUT pdfmark") return removableEmbeddings;
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#ifdef DEBUG
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EXV_DEBUG << "findRemovableEmbeddings: Found /PUT pdfmark\n";
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#endif
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} else {
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return removableEmbeddings;
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}
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// check whether another XMP metadata block would take precedence if this one was removed
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{
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size_t xmpPos, xmpSize;
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findXmp(xmpPos, xmpSize, data, posStart, posEndPageSetup, write);
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if (xmpSize != 0) {
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#ifndef SUPPRESS_WARNINGS
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EXV_WARNING << "Second XMP metadata block interferes at position: " << xmpPos << "\n";
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#endif
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if (write) throw Error(21);
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}
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}
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removableEmbeddings.push_back(std::make_pair(posEmbeddingStart, posEmbeddingEnd));
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removableEmbeddings.push_back(std::make_pair(pos, posEof));
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#ifdef DEBUG
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const size_t n = removableEmbeddings.size();
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EXV_DEBUG << "findRemovableEmbeddings: Recognized Photoshop-style XMP embedding at "
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"[" << removableEmbeddings[n-2].first << "," << removableEmbeddings[n-2].second << ")"
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" with trailer "
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"[" << removableEmbeddings[n-1].first << "," << removableEmbeddings[n-1].second << ")"
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"\n";
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#endif
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return removableEmbeddings;
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}
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//! Unified implementation of reading and writing EPS metadata
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//! Unified implementation of reading and writing EPS metadata
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static void readWriteEpsMetadata(BasicIo& io, std::string& xmpPacket, NativePreviewList& nativePreviews, bool write)
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static void readWriteEpsMetadata(BasicIo& io, std::string& xmpPacket, NativePreviewList& nativePreviews, bool write)
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{
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{
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@ -529,10 +429,13 @@ namespace {
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size_t posEndPageSetup = posEndEps;
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size_t posEndPageSetup = posEndEps;
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size_t posPageTrailer = posEndEps;
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size_t posPageTrailer = posEndEps;
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size_t posEof = posEndEps;
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size_t posEof = posEndEps;
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std::vector<std::pair<size_t, size_t> > removableEmbeddings;
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bool implicitPage = false;
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bool implicitPage = false;
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bool photoshop = false;
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bool photoshop = false;
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bool inDefaultsOrPrologOrSetup = false;
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bool inDefaultsOrPrologOrSetup = false;
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bool inPageSetup = false;
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bool inPageSetup = false;
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bool inPhotoshopXmp = false;
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bool inExiv2Xmp = false;
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for (size_t pos = posEps; pos < posEof;) {
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for (size_t pos = posEps; pos < posEof;) {
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const size_t startPos = pos;
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const size_t startPos = pos;
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std::string line;
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std::string line;
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@ -546,15 +449,15 @@ namespace {
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#endif
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#endif
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}
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}
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}
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}
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if (line == "%%EOF" || line == "%begin_xml_code" || (line.size() >= 1 && line[0] != '%')) {
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if (line == "%%EOF" || (line.size() >= 1 && line[0] != '%')) {
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if (posPage == posEndEps && posEndComments != posEndEps && !inDefaultsOrPrologOrSetup && !onlyWhitespaces(line)) {
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if (posPage == posEndEps && posEndComments != posEndEps && !inDefaultsOrPrologOrSetup && !inPhotoshopXmp && !onlyWhitespaces(line)) {
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posPage = startPos;
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posPage = startPos;
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implicitPage = true;
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implicitPage = true;
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#ifdef DEBUG
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#ifdef DEBUG
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EXV_DEBUG << "readWriteEpsMetadata: Found implicit Page at position: " << startPos << "\n";
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EXV_DEBUG << "readWriteEpsMetadata: Found implicit Page at position: " << startPos << "\n";
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#endif
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#endif
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}
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}
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if (posEndPageSetup == posEndEps && posPage != posEndEps && !inPageSetup) {
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if (posEndPageSetup == posEndEps && posPage != posEndEps && !inPageSetup && !inPhotoshopXmp) {
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posEndPageSetup = startPos;
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posEndPageSetup = startPos;
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#ifdef DEBUG
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#ifdef DEBUG
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EXV_DEBUG << "readWriteEpsMetadata: Found implicit EndPageSetup at position: " << startPos << "\n";
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EXV_DEBUG << "readWriteEpsMetadata: Found implicit EndPageSetup at position: " << startPos << "\n";
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@ -607,6 +510,22 @@ namespace {
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posPageTrailer = startPos;
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posPageTrailer = startPos;
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} else if (startsWith(line, "%BeginPhotoshop:")) {
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} else if (startsWith(line, "%BeginPhotoshop:")) {
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photoshop = true;
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photoshop = true;
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} else if (posEndPageSetup == posEndEps && line == "%Exiv2BeginXMP: Before %%EndPageSetup") {
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inExiv2Xmp = true;
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} else if (posEndPageSetup == posEndEps && line == "%Exiv2EndXMP") {
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inExiv2Xmp = false;
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} else if (posEndPageSetup == posEndEps && !inExiv2Xmp && line == "%begin_xml_code") {
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inPhotoshopXmp = true;
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removableEmbeddings.push_back(std::make_pair(startPos, startPos));
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} else if (posEndPageSetup == posEndEps && !inExiv2Xmp && line == "%end_xml_code") {
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if (!inPhotoshopXmp) {
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#ifndef SUPPRESS_WARNINGS
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EXV_WARNING << "Unexpected Photoshop end_xml_code at position: " << startPos << "\n";
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#endif
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throw Error(write ? 21 : 14);
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}
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inPhotoshopXmp = false;
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removableEmbeddings.back().second = pos;
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} else if (line == "%%EOF") {
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} else if (line == "%%EOF") {
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posEof = startPos;
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posEof = startPos;
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} else if (startsWith(line, "%%BeginDocument:")) {
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} else if (startsWith(line, "%%BeginDocument:")) {
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@ -650,6 +569,38 @@ namespace {
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#endif
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#endif
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}
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}
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// look for the trailers of the removable XMP embeddings
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const size_t numRemovableEmbeddings = removableEmbeddings.size();
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size_t posXmpTrailerEnd = posEof;
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for (size_t i = 0; i < numRemovableEmbeddings; i++) {
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std::string line1;
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const size_t posLine1 = readPrevLine(line1, data, posXmpTrailerEnd, posEndEps);
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std::string line2;
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const size_t posLine2 = readPrevLine(line2, data, posLine1, posEndEps);
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size_t posXmpTrailer;
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if (line1 == "[/EMC pdfmark") { // Exiftool style
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posXmpTrailer = posLine1;
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} else if (line1 == "[/NamespacePop pdfmark" &&
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line2 == "[{nextImage} 1 dict begin /Metadata {photoshop_metadata_stream} def currentdict end /PUT pdfmark") { // Photoshop style
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posXmpTrailer = posLine2;
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} else {
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#ifndef SUPPRESS_WARNINGS
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EXV_WARNING << "Unable to find XMP embedding trailer ending at position: " << posXmpTrailerEnd << "\n";
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#endif
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if (write) throw Error(21);
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break;
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}
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removableEmbeddings.push_back(std::make_pair(posXmpTrailer, posXmpTrailerEnd));
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#ifdef DEBUG
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EXV_DEBUG << "readWriteEpsMetadata: Recognized removable XMP embedding at "
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"[" << removableEmbeddings[i].first << "," << removableEmbeddings[i].second << ")"
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" with trailer "
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"[" << removableEmbeddings.back().first << "," << removableEmbeddings.back().second << ")"
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"\n";
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#endif
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posXmpTrailerEnd = posXmpTrailer;
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}
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// interpret comment "%ADO_ContainsXMP:"
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// interpret comment "%ADO_ContainsXMP:"
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std::string line;
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std::string line;
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readLine(line, data, posContainsXmp, posEndEps);
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readLine(line, data, posContainsXmp, posEndEps);
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@ -665,8 +616,8 @@ namespace {
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throw Error(write ? 21 : 14);
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throw Error(write ? 21 : 14);
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}
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}
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std::vector<std::pair<size_t, size_t> > removableEmbeddings;
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bool fixBeginXmlPacket = false;
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bool fixBeginXmlPacket = false;
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bool flexibleEmbedding = false;
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size_t xmpPos = posEndEps;
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size_t xmpPos = posEndEps;
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size_t xmpSize = 0;
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size_t xmpSize = 0;
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if (containsXmp) {
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if (containsXmp) {
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@ -687,14 +638,15 @@ namespace {
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if (write) throw Error(21);
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if (write) throw Error(21);
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}
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}
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readLine(line, data, posLineAfterXmp, posEndEps);
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readLine(line, data, posLineAfterXmp, posEndEps);
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if (line == "% &&end XMP packet marker&&" || line == "% &&end XMP packet marker&&") {
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flexibleEmbedding = (line == "% &&end XMP packet marker&&" || line == "% &&end XMP packet marker&&");
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if (flexibleEmbedding) {
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#ifdef DEBUG
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#ifdef DEBUG
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EXV_DEBUG << "readWriteEpsMetadata: Recognized flexible XMP embedding\n";
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EXV_DEBUG << "readWriteEpsMetadata: XMP embedding is flexible\n";
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#endif
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#endif
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const size_t posBeginXmlPacket = readPrevLine(line, data, xmpPos, posEndEps);
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const size_t posBeginXmlPacket = readPrevLine(line, data, xmpPos, posEndEps);
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if (startsWith(line, "%begin_xml_packet:")) {
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if (startsWith(line, "%begin_xml_packet:")) {
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#ifdef DEBUG
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#ifdef DEBUG
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EXV_DEBUG << "readWriteEpsMetadata: Found %begin_xml_packet before flexible XMP embedding\n";
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EXV_DEBUG << "readWriteEpsMetadata: XMP embedding contains %begin_xml_packet\n";
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#endif
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#endif
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if (write) {
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if (write) {
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fixBeginXmlPacket = true;
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fixBeginXmlPacket = true;
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@ -708,12 +660,31 @@ namespace {
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if (write) throw Error(21);
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if (write) throw Error(21);
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}
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}
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} else {
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} else {
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removableEmbeddings = findRemovableEmbeddings(data, posEps, posEof, posEndPageSetup, xmpPos, xmpSize, write);
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#ifdef DEBUG
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if (removableEmbeddings.empty()) {
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EXV_DEBUG << "readWriteEpsMetadata: XMP embedding is inflexible\n";
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#endif
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}
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}
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if (!flexibleEmbedding) {
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// check if there are irremovable XMP metadata blocks before EndPageSetup
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size_t posOtherXmp = containsXmp ? xmpPos : posEps;
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size_t sizeOtherXmp = 0;
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for (;;) {
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findXmp(posOtherXmp, sizeOtherXmp, data, posOtherXmp + sizeOtherXmp, posEndPageSetup, write);
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if (posOtherXmp >= posEndPageSetup) break;
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bool isRemovableEmbedding = false;
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for (std::vector<std::pair<size_t, size_t> >::const_iterator e = removableEmbeddings.begin(); e != removableEmbeddings.end(); e++) {
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if (e->first <= posOtherXmp && posOtherXmp < e->second) {
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isRemovableEmbedding = true;
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break;
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}
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}
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if (!isRemovableEmbedding) {
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#ifndef SUPPRESS_WARNINGS
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#ifndef SUPPRESS_WARNINGS
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EXV_WARNING << "Unknown XMP embedding at position: " << xmpPos << "\n";
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EXV_WARNING << "Inflexible XMP embedding is not replaceable because XMP metadata block is not removable at position: " << posOtherXmp << "\n";
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#endif
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#endif
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if (write) throw Error(21);
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if (write) throw Error(21);
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break;
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}
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}
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}
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}
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}
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}
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@ -743,8 +714,6 @@ namespace {
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nativePreviews.push_back(nativePreview);
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nativePreviews.push_back(nativePreview);
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}
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}
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} else {
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} else {
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const bool useExistingEmbedding = (xmpPos != posEndEps && removableEmbeddings.empty());
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// TODO: Add support for deleting XMP metadata. Note that this is not
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// TODO: Add support for deleting XMP metadata. Note that this is not
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// as simple as it may seem, and requires special attention!
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// as simple as it may seem, and requires special attention!
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if (xmpPacket.size() == 0) {
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if (xmpPacket.size() == 0) {
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@ -780,7 +749,7 @@ namespace {
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positions.push_back(posPageTrailer);
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positions.push_back(posPageTrailer);
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positions.push_back(posEof);
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positions.push_back(posEof);
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positions.push_back(posEndEps);
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positions.push_back(posEndEps);
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if (useExistingEmbedding) {
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if (flexibleEmbedding) {
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positions.push_back(xmpPos);
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positions.push_back(xmpPos);
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}
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}
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for (std::vector<std::pair<size_t, size_t> >::const_iterator e = removableEmbeddings.begin(); e != removableEmbeddings.end(); e++) {
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for (std::vector<std::pair<size_t, size_t> >::const_iterator e = removableEmbeddings.begin(); e != removableEmbeddings.end(); e++) {
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@ -817,7 +786,7 @@ namespace {
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#endif
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#endif
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}
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}
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// update and complement DSC comments
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// update and complement DSC comments
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if (pos == posLanguageLevel && posLanguageLevel != posEndEps && !useExistingEmbedding) {
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if (pos == posLanguageLevel && posLanguageLevel != posEndEps && !flexibleEmbedding) {
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if (line == "%%LanguageLevel:1" || line == "%%LanguageLevel: 1") {
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if (line == "%%LanguageLevel:1" || line == "%%LanguageLevel: 1") {
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writeTemp(*tempIo, "%%LanguageLevel: 2" + lineEnding);
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writeTemp(*tempIo, "%%LanguageLevel: 2" + lineEnding);
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skipPos = posLineEnd;
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skipPos = posLineEnd;
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@ -838,7 +807,7 @@ namespace {
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skipPos = posLineEnd;
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skipPos = posLineEnd;
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}
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}
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if (pos == posEndComments) {
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if (pos == posEndComments) {
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if (posLanguageLevel == posEndEps && !useExistingEmbedding) {
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if (posLanguageLevel == posEndEps && !flexibleEmbedding) {
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writeTemp(*tempIo, "%%LanguageLevel: 2" + lineEnding);
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writeTemp(*tempIo, "%%LanguageLevel: 2" + lineEnding);
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}
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}
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if (posContainsXmp == posEndEps) {
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if (posContainsXmp == posEndEps) {
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@ -864,14 +833,7 @@ namespace {
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writeTemp(*tempIo, "%%EndPageComments" + lineEnding);
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writeTemp(*tempIo, "%%EndPageComments" + lineEnding);
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}
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}
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}
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}
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// remove unflexible embeddings
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if (flexibleEmbedding) {
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for (std::vector<std::pair<size_t, size_t> >::const_iterator e = removableEmbeddings.begin(); e != removableEmbeddings.end(); e++) {
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if (pos == e->first) {
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skipPos = e->second;
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break;
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}
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}
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if (useExistingEmbedding) {
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// insert XMP metadata into existing flexible embedding
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// insert XMP metadata into existing flexible embedding
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if (pos == xmpPos) {
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if (pos == xmpPos) {
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if (fixBeginXmlPacket) {
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if (fixBeginXmlPacket) {
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@ -881,6 +843,13 @@ namespace {
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skipPos += xmpSize;
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skipPos += xmpSize;
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}
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}
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} else {
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} else {
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// remove preceding embedding(s)
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for (std::vector<std::pair<size_t, size_t> >::const_iterator e = removableEmbeddings.begin(); e != removableEmbeddings.end(); e++) {
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if (pos == e->first) {
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skipPos = e->second;
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break;
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}
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}
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// insert XMP metadata with new flexible embedding
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// insert XMP metadata with new flexible embedding
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if (pos == posEndPageSetup) {
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if (pos == posEndPageSetup) {
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if (line != "%%EndPageSetup") {
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if (line != "%%EndPageSetup") {
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vog
14 years ago