void showPageContent(PDFParser& parser, RefCountPtr<PDFObject> contents, InputFile& pdfFile)
{
if(contents->GetType() == ePDFObjectArray)
{
PDFObjectCastPtr<PDFIndirectObjectReference> streamReferences;
SingleValueContainerIterator<PDFObjectVector> itContents = ((PDFArray*)contents.GetPtr())->GetIterator();
// array of streams
while(itContents.MoveNext())
{
streamReferences = itContents.GetItem();
PDFObjectCastPtr<PDFStreamInput> stream = parser.ParseNewObject(streamReferences->mObjectID);
showContentStream(stream.GetPtr(),pdfFile.GetInputStream(),parser);
}
}
else
{
// stream
showContentStream((PDFStreamInput*)contents.GetPtr(),pdfFile.GetInputStream(),parser);
}
}
ObjectIDType DCTDecodeFilterTest::FindDCTDecodedImageObject(PDFParser* inParser)
{
ObjectIDType imageObject = 0;
do
{
// find image by looking for the first image in the first page
RefCountPtr<PDFDictionary> firstPage = inParser->ParsePage(0);
if(!firstPage)
break;
PDFObjectCastPtr<PDFDictionary> resourceDictionary(inParser->QueryDictionaryObject(firstPage.GetPtr(),"Resources"));
if(!resourceDictionary)
break;
PDFObjectCastPtr<PDFDictionary> xobjectDictionary(inParser->QueryDictionaryObject(resourceDictionary.GetPtr(), "XObject"));
if(!xobjectDictionary)
break;
MapIterator<PDFNameToPDFObjectMap> it = xobjectDictionary->GetIterator();
while(it.MoveNext())
{
if(it.GetValue()->GetType() == PDFObject::ePDFObjectIndirectObjectReference)
{
PDFObjectCastPtr<PDFStreamInput> image(
inParser->ParseNewObject(((PDFIndirectObjectReference*)it.GetValue())->mObjectID));
RefCountPtr<PDFDictionary> imageDictionary = image->QueryStreamDictionary();
PDFObjectCastPtr<PDFName> objectType = imageDictionary->QueryDirectObject("Subtype");
if(!objectType || objectType->GetValue() != "Image")
continue;
RefCountPtr<PDFObject> filters = imageDictionary->QueryDirectObject("Filter");
if(!filters)
break;
if(filters->GetType() == PDFObject::ePDFObjectName &&
((PDFName*)filters.GetPtr())->GetValue() == "DCTDecode")
{
imageObject = ((PDFIndirectObjectReference*)it.GetValue())->mObjectID;
break;
}
PDFArray* filtersArray = (PDFArray*)filters.GetPtr();
if(filtersArray->GetLength() == 1)
{
PDFObjectCastPtr<PDFName> firstDecoder(filtersArray->QueryObject(0));
if(firstDecoder->GetValue() == "DCTDecode")
{
imageObject = ((PDFIndirectObjectReference*)it.GetValue())->mObjectID;
break;
}
}
}
}
}
while (false);
return imageObject;
}