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; }