EStatusCode CFFEmbeddedFontWriter::WriteEmbeddedFont(
FreeTypeFaceWrapper& inFontInfo,
const UIntVector& inSubsetGlyphIDs,
const std::string& inFontFile3SubType,
const std::string& inSubsetFontName,
ObjectsContext* inObjectsContext,
UShortVector* inCIDMapping,
ObjectIDType& outEmbeddedFontObjectID)
{
MyStringBuf rawFontProgram;
bool notEmbedded;
// as oppose to true type, the reason for using a memory stream here is mainly peformance - i don't want to start
// setting file pointers and move in a file stream
EStatusCode status;
do
{
status = CreateCFFSubset(inFontInfo,inSubsetGlyphIDs,inCIDMapping,inSubsetFontName,notEmbedded,rawFontProgram);
if(status != PDFHummus::eSuccess)
{
TRACE_LOG("CFFEmbeddedFontWriter::WriteEmbeddedFont, failed to write embedded font program");
break;
}
if(notEmbedded)
{
// can't embed. mark succesful, and go back empty
outEmbeddedFontObjectID = 0;
TRACE_LOG("CFFEmbeddedFontWriter::WriteEmbeddedFont, font may not be embedded. so not embedding");
return PDFHummus::eSuccess;
}
outEmbeddedFontObjectID = inObjectsContext->StartNewIndirectObject();
DictionaryContext* fontProgramDictionaryContext = inObjectsContext->StartDictionary();
rawFontProgram.pubseekoff(0,std::ios_base::beg);
fontProgramDictionaryContext->WriteKey(scSubtype);
fontProgramDictionaryContext->WriteNameValue(inFontFile3SubType);
PDFStream* pdfStream = inObjectsContext->StartPDFStream(fontProgramDictionaryContext);
// now copy the created font program to the output stream
InputStringBufferStream fontProgramStream(&rawFontProgram);
OutputStreamTraits streamCopier(pdfStream->GetWriteStream());
status = streamCopier.CopyToOutputStream(&fontProgramStream);
if(status != PDFHummus::eSuccess)
{
TRACE_LOG("CFFEmbeddedFontWriter::WriteEmbeddedFont, failed to copy font program into pdf stream");
break;
}
inObjectsContext->EndPDFStream(pdfStream);
delete pdfStream;
}while(false);
return status;
}
void DescendentFontWriter::WriteCIDSet(const UIntAndGlyphEncodingInfoVector& inEncodedGlyphs)
{
mObjectsContext->StartNewIndirectObject(mCIDSetObjectID);
PDFStream* pdfStream = mObjectsContext->StartPDFStream();
IByteWriter* cidSetWritingContext = pdfStream->GetWriteStream();
Byte buffer;
UIntAndGlyphEncodingInfoVector::const_iterator it = inEncodedGlyphs.begin();
unsigned int upperLimit = inEncodedGlyphs.back().first;
for(unsigned int i=0; i < upperLimit; i+=8)
{
buffer = (it->first == i) ? 1:0;
if(it->first == i)
++it;
for(unsigned int j=1;j<8;++j)
{
buffer = buffer << 1;
if(it != inEncodedGlyphs.end() && (it->first == i + j))
{
buffer |= 1;
++it;
if(it == inEncodedGlyphs.end())
break;
}
}
cidSetWritingContext->Write(&buffer,1);
}
mObjectsContext->EndPDFStream(pdfStream);
delete pdfStream;
}
EStatusCode TrueTypeEmbeddedFontWriter::WriteEmbeddedFont(
FreeTypeFaceWrapper& inFontInfo,
const UIntVector& inSubsetGlyphIDs,
ObjectsContext* inObjectsContext,
ObjectIDType& outEmbeddedFontObjectID)
{
MyStringBuf rawFontProgram;
bool notEmbedded;
EStatusCode status;
do
{
status = CreateTrueTypeSubset(inFontInfo,inSubsetGlyphIDs,notEmbedded,rawFontProgram);
if(status != PDFHummus::eSuccess)
{
TRACE_LOG("TrueTypeEmbeddedFontWriter::WriteEmbeddedFont, failed to write embedded font program");
break;
}
if(notEmbedded)
{
// can't embed. mark succesful, and go back empty
outEmbeddedFontObjectID = 0;
TRACE_LOG("TrueTypeEmbeddedFontWriter::WriteEmbeddedFont, font may not be embedded. so not embedding");
return PDFHummus::eSuccess;
}
outEmbeddedFontObjectID = inObjectsContext->StartNewIndirectObject();
DictionaryContext* fontProgramDictionaryContext = inObjectsContext->StartDictionary();
// Length1 (decompressed true type program length)
fontProgramDictionaryContext->WriteKey(scLength1);
fontProgramDictionaryContext->WriteIntegerValue(rawFontProgram.GetCurrentWritePosition());
rawFontProgram.pubseekoff(0,std::ios_base::beg);
PDFStream* pdfStream = inObjectsContext->StartPDFStream(fontProgramDictionaryContext);
// now copy the created font program to the output stream
InputStringBufferStream fontProgramStream(&rawFontProgram);
OutputStreamTraits streamCopier(pdfStream->GetWriteStream());
status = streamCopier.CopyToOutputStream(&fontProgramStream);
if(status != PDFHummus::eSuccess)
{
TRACE_LOG("TrueTypeEmbeddedFontWriter::WriteEmbeddedFont, failed to copy font program into pdf stream");
break;
}
inObjectsContext->EndPDFStream(pdfStream);
delete pdfStream;
}while(false);
return status;
}
void CIDFontWriter::WriteToUnicodeMap(ObjectIDType inToUnicodeMap)
{
mObjectsContext->StartNewIndirectObject(inToUnicodeMap);
PDFStream* pdfStream = mObjectsContext->StartPDFStream();
IByteWriter* cmapWriteContext = pdfStream->GetWriteStream();
PrimitiveObjectsWriter primitiveWriter(cmapWriteContext);
unsigned long i = 1;
UIntAndGlyphEncodingInfoVector::iterator it = mCharactersVector.begin() + 1; // skip 0 glyph
unsigned long vectorSize = (unsigned long)mCharactersVector.size() - 1; // cause 0 is not there
cmapWriteContext->Write((const Byte*)scCmapHeader,strlen(scCmapHeader));
primitiveWriter.WriteHexString(scFourByteRangeStart);
primitiveWriter.WriteHexString(scFourByteRangeEnd,eTokenSeparatorEndLine);
cmapWriteContext->Write((const Byte*)scEndCodeSpaceRange,strlen(scEndCodeSpaceRange));
if(vectorSize < 100)
primitiveWriter.WriteInteger(vectorSize);
else
primitiveWriter.WriteInteger(100);
primitiveWriter.WriteKeyword(scBeginBFChar);
WriteGlyphEntry(cmapWriteContext,it->second.mEncodedCharacter,it->second.mUnicodeCharacters);
++it;
for(; it != mCharactersVector.end(); ++it,++i)
{
if(i % 100 == 0)
{
primitiveWriter.WriteKeyword(scEndBFChar);
if(vectorSize - i < 100)
primitiveWriter.WriteInteger(vectorSize - i);
else
primitiveWriter.WriteInteger(100);
primitiveWriter.WriteKeyword(scBeginBFChar);
}
WriteGlyphEntry(cmapWriteContext,it->second.mEncodedCharacter,it->second.mUnicodeCharacters);
}
primitiveWriter.WriteKeyword(scEndBFChar);
cmapWriteContext->Write((const Byte*)scCmapFooter,strlen(scCmapFooter));
mObjectsContext->EndPDFStream(pdfStream);
delete pdfStream;
}
EStatusCode DCTDecodeFilterTest::ModifyImageObject(PDFWriter* inWriter,ObjectIDType inImageObject)
{
EStatusCode status = eSuccess;
PDFDocumentCopyingContext* modifiedFileContext = inWriter->CreatePDFCopyingContextForModifiedFile();
do
{
// get image source dictionary
PDFObjectCastPtr<PDFStreamInput> imageStream(inWriter->GetModifiedFileParser().ParseNewObject(inImageObject));
RefCountPtr<PDFDictionary> imageDictionary(imageStream->QueryStreamDictionary());
// strt object for modified image
inWriter->GetObjectsContext().StartModifiedIndirectObject(inImageObject);
DictionaryContext* newImageDictionary = inWriter->GetObjectsContext().StartDictionary();
MapIterator<PDFNameToPDFObjectMap> it = imageDictionary->GetIterator();
// copy all but "Filter" and "Length"
ObjectIDTypeList indirectObjects;
while (it.MoveNext())
{
if(it.GetKey()->GetValue() == "Filter" || it.GetKey()->GetValue() == "Length")
continue;
newImageDictionary->WriteKey(it.GetKey()->GetValue());
EStatusCodeAndObjectIDTypeList result = modifiedFileContext->CopyDirectObjectWithDeepCopy(it.GetValue());
if(result.first != eSuccess)
{
status = result.first;
break;
}
indirectObjects.insert(indirectObjects.end(),result.second.begin(),result.second.end());
}
if(status != eSuccess)
break;
// start image stream for this dictionary (make sure it's unfiltered)
PDFStream* newImageStream = inWriter->GetObjectsContext().StartUnfilteredPDFStream(newImageDictionary);
// copy source stream through read filter
IByteReader* sourceImage = modifiedFileContext->GetSourceDocumentParser()->StartReadingFromStream(imageStream.GetPtr());
if(!sourceImage)
{
cout<<"failed to read DCT stream\n";
status = eFailure;
break;
}
OutputStreamTraits traits(newImageStream->GetWriteStream());
status = traits.CopyToOutputStream(sourceImage);
// finalize stream
inWriter->GetObjectsContext().EndPDFStream(newImageStream);
delete newImageStream;
// late check for status so stream is deleted
if(status != eSuccess)
break;
// copy remaining indirect objects from image stream dictionary
status = modifiedFileContext->CopyNewObjectsForDirectObject(indirectObjects);
}
while (false);
delete modifiedFileContext;
return status;
}
EStatusCode ObjectsContext::WriteXrefStream(DictionaryContext* inDictionaryContext)
{
// k. complement input dictionary with the relevant entries - W and Index
// then continue with a regular stream, forced to have "length" as direct object
// write Index entry
inDictionaryContext->WriteKey("Index");
StartArray();
ObjectIDType startID = 0;
ObjectIDType firstIDNotInRange;
while(startID < mReferencesRegistry.GetObjectsCount())
{
firstIDNotInRange = startID;
// look for first ID that does not require update [for first version of PDF...it will be the end]
while(firstIDNotInRange < mReferencesRegistry.GetObjectsCount() &&
mReferencesRegistry.GetNthObjectReference(firstIDNotInRange).mIsDirty)
++firstIDNotInRange;
// write section header
mPrimitiveWriter.WriteInteger(startID);
mPrimitiveWriter.WriteInteger(firstIDNotInRange - startID);
startID = firstIDNotInRange;
// now promote startID to the next object to update
while(startID < mReferencesRegistry.GetObjectsCount() &&
!mReferencesRegistry.GetNthObjectReference(startID).mIsDirty)
++startID;
}
EndArray();
EndLine();
// write W entry, which is going to be 1 sizeof(long long) and sizeof(unsigned long), per the types i'm using
size_t typeSize = 1;
size_t locationSize = sizeof(LongFilePositionType);
size_t generationSize = sizeof(unsigned long);
inDictionaryContext->WriteKey("W");
StartArray();
WriteInteger(typeSize);
WriteInteger(locationSize);
WriteInteger(generationSize);
EndArray();
EndLine();
// start the xref stream itself
PDFStream* aStream = StartPDFStream(inDictionaryContext,true);
// now write the table data itself
EStatusCode status = eSuccess;
ObjectIDType nextFreeObject = 0;
do {
for(ObjectIDType i = 0; i < mReferencesRegistry.GetObjectsCount() && eSuccess == status;++i)
{
if(!mReferencesRegistry.GetNthObjectReference(i).mIsDirty)
continue;
const ObjectWriteInformation& objectReference = mReferencesRegistry.GetNthObjectReference(i);
if(objectReference.mObjectReferenceType == ObjectWriteInformation::Used)
{
// used object
if(objectReference.mObjectWritten)
{
WriteXrefNumber(aStream->GetWriteStream(),1,typeSize);
WriteXrefNumber(aStream->GetWriteStream(),objectReference.mWritePosition,locationSize);
WriteXrefNumber(aStream->GetWriteStream(),objectReference.mGenerationNumber,generationSize);
}
else
{
// object not written. at this point this should not happen, and indicates a failure
status = PDFHummus::eFailure;
TRACE_LOG1("ObjectsContext::WriteXrefStream, Unexpected Failure. Object of ID = %ld was not registered as written. probably means it was not written",i);
}
}
else
{
// free object
++nextFreeObject;
// look for next dirty & free object, to be the next item of linked list
while(nextFreeObject < mReferencesRegistry.GetObjectsCount() &&
(!mReferencesRegistry.GetNthObjectReference(nextFreeObject).mIsDirty ||
mReferencesRegistry.GetNthObjectReference(nextFreeObject).mObjectReferenceType != ObjectWriteInformation::Free))
++nextFreeObject;
// if reached end of list, then link back to head - 0
if(nextFreeObject == mReferencesRegistry.GetObjectsCount())
nextFreeObject = 0;
WriteXrefNumber(aStream->GetWriteStream(),0,typeSize);
WriteXrefNumber(aStream->GetWriteStream(),nextFreeObject,locationSize);
WriteXrefNumber(aStream->GetWriteStream(),objectReference.mGenerationNumber,generationSize);
}
}
if(status != eSuccess)
break;
// end the stream and g'bye
EndPDFStream(aStream);
}
while (false);
return status;
}
PDFHummus::EStatusCode PDFModifiedPage::WritePage()
{
EStatusCode status = EndContentContext(); // just in case someone forgot to close the latest content context
do {
if (status != eSuccess || !mIsDirty) {
break;
}
// allocate an object ID for the new contents stream (for placing the form)
// we first create the modified page object, so that we can define a name for the new form xobject
// that is unique
ObjectsContext& objectContext = mWriter->GetObjectsContext();
ObjectIDType newContentObjectID = objectContext.GetInDirectObjectsRegistry().AllocateNewObjectID();
ObjectIDType newEncapsulatingObjectID = 0;
// create a copying context, so we can copy the page dictionary, and modify its contents + resources dict
PDFDocumentCopyingContext* copyingContext = mWriter->CreatePDFCopyingContextForModifiedFile();
// get the page object
ObjectIDType pageObjectID = copyingContext->GetSourceDocumentParser()->GetPageObjectID(mPageIndex);
PDFObjectCastPtr<PDFDictionary> pageDictionaryObject = copyingContext->GetSourceDocumentParser()->ParsePage(mPageIndex);
MapIterator<PDFNameToPDFObjectMap> pageDictionaryObjectIt = pageDictionaryObject->GetIterator();
// create modified page object
objectContext.StartModifiedIndirectObject(pageObjectID);
DictionaryContext* modifiedPageObject = mWriter->GetObjectsContext().StartDictionary();
// copy all elements of the page to the new page object, but the "Contents", "Resources" and "Annots" elements
while (pageDictionaryObjectIt.MoveNext())
{
if (pageDictionaryObjectIt.GetKey()->GetValue() != "Resources" &&
pageDictionaryObjectIt.GetKey()->GetValue() != "Contents" &&
pageDictionaryObjectIt.GetKey()->GetValue() != "Annots")
{
modifiedPageObject->WriteKey(pageDictionaryObjectIt.GetKey()->GetValue());
copyingContext->CopyDirectObjectAsIs(pageDictionaryObjectIt.GetValue());
}
}
// Write new annotations entry, joining existing annotations, and new ones (from links attaching or what not)
if (pageDictionaryObject->Exists("Annots") || mWriter->GetDocumentContext().GetAnnotations().size() > 0)
{
modifiedPageObject->WriteKey("Annots");
objectContext.StartArray();
// write old annots, if any exist
if(pageDictionaryObject->Exists("Annots")) {
PDFObjectCastPtr<PDFArray> anArray(copyingContext->GetSourceDocumentParser()->QueryDictionaryObject(pageDictionaryObject.GetPtr(), "Annots"));
SingleValueContainerIterator<PDFObjectVector> refs = anArray->GetIterator();
while (refs.MoveNext())
copyingContext->CopyDirectObjectAsIs(refs.GetItem());
}
// write new annots from links
ObjectIDTypeSet& annotations = mWriter->GetDocumentContext().GetAnnotations();
if (annotations.size() > 0)
{
ObjectIDTypeSet::iterator it = annotations.begin();
for (; it != annotations.end(); ++it)
objectContext.WriteNewIndirectObjectReference(*it);
}
annotations.clear();
objectContext.EndArray(eTokenSeparatorEndLine);
}
// Write new contents entry, joining the existing contents with the new one. take care of various scenarios of the existing Contents
modifiedPageObject->WriteKey("Contents");
if (!pageDictionaryObject->Exists("Contents"))
{ // no contents
objectContext.WriteIndirectObjectReference(newContentObjectID);
}
else
{
objectContext.StartArray();
if (mEnsureContentEncapsulation)
{
newEncapsulatingObjectID = objectContext.GetInDirectObjectsRegistry().AllocateNewObjectID();
objectContext.WriteNewIndirectObjectReference(newEncapsulatingObjectID);
}
RefCountPtr<PDFObject> pageContent(copyingContext->GetSourceDocumentParser()->QueryDictionaryObject(pageDictionaryObject.GetPtr(), "Contents"));
if (pageContent->GetType() == PDFObject::ePDFObjectStream)
{
// single content stream. must be a refrence which points to it
PDFObjectCastPtr<PDFIndirectObjectReference> ref(pageDictionaryObject->QueryDirectObject("Contents"));
objectContext.WriteIndirectObjectReference(ref->mObjectID, ref->mVersion);
}
else if (pageContent->GetType() == PDFObject::ePDFObjectArray)
{
PDFArray* anArray = (PDFArray*)pageContent.GetPtr();
// multiple content streams
SingleValueContainerIterator<PDFObjectVector> refs = anArray->GetIterator();
PDFObjectCastPtr<PDFIndirectObjectReference> ref;
while (refs.MoveNext())
{
ref = refs.GetItem();
objectContext.WriteIndirectObjectReference(ref->mObjectID, ref->mVersion);
}
}
else {
// this basically means no content...or whatever. just ignore.
}
objectContext.WriteNewIndirectObjectReference(newContentObjectID);
objectContext.EndArray();
objectContext.EndLine();
}
// Write a new resource entry. copy all but the "XObject" entry, which needs to be modified. Just for kicks i'm keeping the original
// form (either direct dictionary, or indirect object)
ObjectIDType resourcesIndirect = 0;
ObjectIDType newResourcesIndirect = 0;
vector<string> formResourcesNames;
modifiedPageObject->WriteKey("Resources");
if (!pageDictionaryObject->Exists("Resources"))
{
// check if there's inherited dict. if so - write directly as a modified version
PDFObjectCastPtr<PDFDictionary> parentDict(
pageDictionaryObject->Exists("Parent") ?
copyingContext->GetSourceDocumentParser()->QueryDictionaryObject(pageDictionaryObject.GetPtr(), "Parent"):
NULL);
if(!parentDict) {
formResourcesNames = WriteNewResourcesDictionary(objectContext);
}
else {
PDFObjectCastPtr<PDFDictionary> inheritedResources = findInheritedResources(copyingContext->GetSourceDocumentParser(),parentDict.GetPtr());
if(!inheritedResources) {
formResourcesNames = WriteNewResourcesDictionary(objectContext);
} else {
formResourcesNames = WriteModifiedResourcesDict(copyingContext->GetSourceDocumentParser(), inheritedResources.GetPtr(), objectContext, copyingContext);
}
}
}
else
{
// resources may be direct, or indirect. if direct, write as is, adding the new form xobject, otherwise wait till page object ends and write then
PDFObjectCastPtr<PDFIndirectObjectReference> resourceDictRef(pageDictionaryObject->QueryDirectObject("Resources"));
if (!resourceDictRef)
{
PDFObjectCastPtr<PDFDictionary> resourceDict(pageDictionaryObject->QueryDirectObject("Resources"));
formResourcesNames = WriteModifiedResourcesDict(copyingContext->GetSourceDocumentParser(), resourceDict.GetPtr(), objectContext, copyingContext);
}
else
{
resourcesIndirect = resourceDictRef->mObjectID;
// later will write a modified version of the resources dictionary, with the new form.
// only modify the resources dict object if wasn't already modified (can happen when sharing resources dict between multiple pages).
// in the case where it was alrady modified, create a new resources dictionary that's a copy, and use it instead, to avoid overwriting
// the previous modification
GetObjectWriteInformationResult res = objectContext.GetInDirectObjectsRegistry().GetObjectWriteInformation(resourcesIndirect);
if (res.first && res.second.mIsDirty)
{
newResourcesIndirect = objectContext.GetInDirectObjectsRegistry().AllocateNewObjectID();
modifiedPageObject->WriteObjectReferenceValue(newResourcesIndirect);
}
else
modifiedPageObject->WriteObjectReferenceValue(resourcesIndirect);
}
}
objectContext.EndDictionary(modifiedPageObject);
objectContext.EndIndirectObject();
if (resourcesIndirect != 0)
{
if (newResourcesIndirect != 0)
objectContext.StartNewIndirectObject(newResourcesIndirect);
else
objectContext.StartModifiedIndirectObject(resourcesIndirect);
PDFObjectCastPtr<PDFDictionary> resourceDict(copyingContext->GetSourceDocumentParser()->ParseNewObject(resourcesIndirect));
formResourcesNames = WriteModifiedResourcesDict(copyingContext->GetSourceDocumentParser(), resourceDict.GetPtr(), objectContext, copyingContext);
objectContext.EndIndirectObject();
}
// if required write encapsulation code, so that new stream is independent of graphic context of original
PDFStream* newStream;
PrimitiveObjectsWriter primitivesWriter;
if (newEncapsulatingObjectID != 0)
{
objectContext.StartNewIndirectObject(newEncapsulatingObjectID);
newStream = objectContext.StartPDFStream();
primitivesWriter.SetStreamForWriting(newStream->GetWriteStream());
primitivesWriter.WriteKeyword("q");
objectContext.EndPDFStream(newStream);
}
// last but not least, create the actual content stream object, placing the form
objectContext.StartNewIndirectObject(newContentObjectID);
newStream = objectContext.StartPDFStream();
primitivesWriter.SetStreamForWriting(newStream->GetWriteStream());
if (newEncapsulatingObjectID != 0) {
primitivesWriter.WriteKeyword("Q");
}
vector<string>::iterator it = formResourcesNames.begin();
for (; it != formResourcesNames.end(); ++it)
{
primitivesWriter.WriteKeyword("q");
primitivesWriter.WriteInteger(1);
primitivesWriter.WriteInteger(0);
primitivesWriter.WriteInteger(0);
primitivesWriter.WriteInteger(1);
primitivesWriter.WriteInteger(0);
primitivesWriter.WriteInteger(0);
primitivesWriter.WriteKeyword("cm");
primitivesWriter.WriteName(*it);
primitivesWriter.WriteKeyword("Do");
primitivesWriter.WriteKeyword("Q");
}
objectContext.EndPDFStream(newStream);
} while (false);
return status;
}
