Move core/fpdfapi/fpdf_edit to core/fpdfapi/edit

BUG=pdfium:603

Review-Url: https://codereview.chromium.org/2386263003

5 files changed, 2421 insertions, 0 deletions

diff --git a/core/fpdfapi/edit/cpdf_creator.h b/core/fpdfapi/edit/cpdf_creator.h
new file mode 100644
index 0000000000..5de3793eb5
--- /dev/null
+++ b/core/fpdfapi/edit/cpdf_creator.h
@@ -0,0 +1,101 @@
+// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#ifndef CORE_FPDFAPI_EDIT_CPDF_CREATOR_H_
+#define CORE_FPDFAPI_EDIT_CPDF_CREATOR_H_
+
+#include <memory>
+
+#include "core/fxcrt/fx_basic.h"
+
+class CPDF_Array;
+class CPDF_CryptoHandler;
+class CPDF_Dictionary;
+class CPDF_Document;
+class CPDF_Object;
+class CPDF_Parser;
+class CPDF_XRefStream;
+
+#define FPDFCREATE_INCREMENTAL 1
+#define FPDFCREATE_NO_ORIGINAL 2
+#define FPDFCREATE_PROGRESSIVE 4
+#define FPDFCREATE_OBJECTSTREAM 8
+
+CFX_ByteTextBuf& operator<<(CFX_ByteTextBuf& buf, const CPDF_Object* pObj);
+
+class CPDF_Creator {
+ public:
+  explicit CPDF_Creator(CPDF_Document* pDoc);
+  ~CPDF_Creator();
+
+  void RemoveSecurity();
+  bool Create(IFX_StreamWrite* pFile, uint32_t flags = 0);
+  int32_t Continue(IFX_Pause* pPause = nullptr);
+  FX_BOOL SetFileVersion(int32_t fileVersion = 17);
+
+ private:
+  friend class CPDF_ObjectStream;
+  friend class CPDF_XRefStream;
+
+  bool Create(uint32_t flags);
+  void ResetStandardSecurity();
+  void Clear();
+
+  void InitOldObjNumOffsets();
+  void InitNewObjNumOffsets();
+  void InitID(FX_BOOL bDefault = TRUE);
+
+  void AppendNewObjNum(uint32_t objbum);
+  int32_t AppendObjectNumberToXRef(uint32_t objnum);
+
+  int32_t WriteDoc_Stage1(IFX_Pause* pPause);
+  int32_t WriteDoc_Stage2(IFX_Pause* pPause);
+  int32_t WriteDoc_Stage3(IFX_Pause* pPause);
+  int32_t WriteDoc_Stage4(IFX_Pause* pPause);
+
+  int32_t WriteOldIndirectObject(uint32_t objnum);
+  int32_t WriteOldObjs(IFX_Pause* pPause);
+  int32_t WriteNewObjs(FX_BOOL bIncremental, IFX_Pause* pPause);
+  int32_t WriteIndirectObj(const CPDF_Object* pObj);
+  int32_t WriteDirectObj(uint32_t objnum,
+                         const CPDF_Object* pObj,
+                         FX_BOOL bEncrypt = TRUE);
+  int32_t WriteIndirectObjectToStream(const CPDF_Object* pObj);
+  int32_t WriteIndirectObj(uint32_t objnum, const CPDF_Object* pObj);
+  int32_t WriteIndirectObjectToStream(uint32_t objnum,
+                                      const uint8_t* pBuffer,
+                                      uint32_t dwSize);
+
+  int32_t WriteStream(const CPDF_Object* pStream,
+                      uint32_t objnum,
+                      CPDF_CryptoHandler* pCrypto);
+
+  CPDF_Document* const m_pDocument;
+  CPDF_Parser* const m_pParser;
+  FX_BOOL m_bSecurityChanged;
+  CPDF_Dictionary* m_pEncryptDict;
+  uint32_t m_dwEncryptObjNum;
+  FX_BOOL m_bEncryptCloned;
+  CPDF_CryptoHandler* m_pCryptoHandler;
+  // Whether this owns the crypto handler |m_pCryptoHandler|.
+  FX_BOOL m_bLocalCryptoHandler;
+  CPDF_Object* m_pMetadata;
+  std::unique_ptr<CPDF_XRefStream> m_pXRefStream;
+  int32_t m_ObjectStreamSize;
+  uint32_t m_dwLastObjNum;
+  CFX_FileBufferArchive m_File;
+  FX_FILESIZE m_Offset;
+  int32_t m_iStage;
+  uint32_t m_dwFlags;
+  FX_POSITION m_Pos;
+  FX_FILESIZE m_XrefStart;
+  CFX_FileSizeListArray m_ObjectOffset;
+  CFX_ArrayTemplate<uint32_t> m_NewObjNumArray;
+  std::unique_ptr<CPDF_Array, ReleaseDeleter<CPDF_Array>> m_pIDArray;
+  int32_t m_FileVersion;
+};
+
+#endif  // CORE_FPDFAPI_EDIT_CPDF_CREATOR_H_
diff --git a/core/fpdfapi/edit/cpdf_pagecontentgenerator.cpp b/core/fpdfapi/edit/cpdf_pagecontentgenerator.cpp
new file mode 100644
index 0000000000..e5d9683da6
--- /dev/null
+++ b/core/fpdfapi/edit/cpdf_pagecontentgenerator.cpp
@@ -0,0 +1,178 @@
+// Copyright 2016 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#include "core/fpdfapi/edit/cpdf_pagecontentgenerator.h"
+
+#include "core/fpdfapi/edit/cpdf_creator.h"
+#include "core/fpdfapi/fpdf_page/cpdf_image.h"
+#include "core/fpdfapi/fpdf_page/cpdf_imageobject.h"
+#include "core/fpdfapi/fpdf_page/cpdf_page.h"
+#include "core/fpdfapi/fpdf_page/cpdf_pageobject.h"
+#include "core/fpdfapi/fpdf_page/pageint.h"
+#include "core/fpdfapi/fpdf_parser/cpdf_array.h"
+#include "core/fpdfapi/fpdf_parser/cpdf_dictionary.h"
+#include "core/fpdfapi/fpdf_parser/cpdf_document.h"
+#include "core/fpdfapi/fpdf_parser/cpdf_stream.h"
+#include "core/fpdfapi/fpdf_parser/cpdf_stream_acc.h"
+#include "core/fpdfapi/fpdf_parser/fpdf_parser_decode.h"
+
+CFX_ByteTextBuf& operator<<(CFX_ByteTextBuf& ar, CFX_Matrix& matrix) {
+  ar << matrix.a << " " << matrix.b << " " << matrix.c << " " << matrix.d << " "
+     << matrix.e << " " << matrix.f;
+  return ar;
+}
+
+CPDF_PageContentGenerator::CPDF_PageContentGenerator(CPDF_Page* pPage)
+    : m_pPage(pPage), m_pDocument(m_pPage->m_pDocument) {
+  for (const auto& pObj : *pPage->GetPageObjectList())
+    InsertPageObject(pObj.get());
+}
+
+CPDF_PageContentGenerator::~CPDF_PageContentGenerator() {}
+
+FX_BOOL CPDF_PageContentGenerator::InsertPageObject(
+    CPDF_PageObject* pPageObject) {
+  return pPageObject && m_pageObjects.Add(pPageObject);
+}
+
+void CPDF_PageContentGenerator::GenerateContent() {
+  CFX_ByteTextBuf buf;
+  CPDF_Dictionary* pPageDict = m_pPage->m_pFormDict;
+  for (int i = 0; i < m_pageObjects.GetSize(); ++i) {
+    CPDF_PageObject* pPageObj = m_pageObjects[i];
+    if (!pPageObj || !pPageObj->IsImage()) {
+      continue;
+    }
+    ProcessImage(buf, pPageObj->AsImage());
+  }
+  CPDF_Object* pContent =
+      pPageDict ? pPageDict->GetDirectObjectFor("Contents") : nullptr;
+  if (pContent)
+    pPageDict->RemoveFor("Contents");
+
+  CPDF_Stream* pStream = new CPDF_Stream;
+  pStream->SetData(buf.GetBuffer(), buf.GetLength());
+  pPageDict->SetReferenceFor("Contents", m_pDocument,
+                             m_pDocument->AddIndirectObject(pStream));
+}
+
+CFX_ByteString CPDF_PageContentGenerator::RealizeResource(
+    CPDF_Object* pResourceObj,
+    const CFX_ByteString& bsType) {
+  if (!m_pPage->m_pResources) {
+    m_pPage->m_pResources =
+        new CPDF_Dictionary(m_pDocument->GetByteStringPool());
+    m_pPage->m_pFormDict->SetReferenceFor(
+        "Resources", m_pDocument,
+        m_pDocument->AddIndirectObject(m_pPage->m_pResources));
+  }
+  CPDF_Dictionary* pResList = m_pPage->m_pResources->GetDictFor(bsType);
+  if (!pResList) {
+    pResList = new CPDF_Dictionary(m_pDocument->GetByteStringPool());
+    m_pPage->m_pResources->SetFor(bsType, pResList);
+  }
+  CFX_ByteString name;
+  int idnum = 1;
+  while (1) {
+    name.Format("FX%c%d", bsType[0], idnum);
+    if (!pResList->KeyExist(name)) {
+      break;
+    }
+    idnum++;
+  }
+  pResList->SetReferenceFor(name, m_pDocument,
+                            m_pDocument->AddIndirectObject(pResourceObj));
+  return name;
+}
+
+void CPDF_PageContentGenerator::ProcessImage(CFX_ByteTextBuf& buf,
+                                             CPDF_ImageObject* pImageObj) {
+  if ((pImageObj->m_Matrix.a == 0 && pImageObj->m_Matrix.b == 0) ||
+      (pImageObj->m_Matrix.c == 0 && pImageObj->m_Matrix.d == 0)) {
+    return;
+  }
+  buf << "q " << pImageObj->m_Matrix << " cm ";
+  CPDF_Image* pImage = pImageObj->GetImage();
+  if (!pImage->IsInline()) {
+    CPDF_Stream* pStream = pImage->GetStream();
+    uint32_t dwSavedObjNum = pStream->GetObjNum();
+    CFX_ByteString name = RealizeResource(pStream, "XObject");
+    if (dwSavedObjNum == 0) {
+      pImageObj->SetUnownedImage(m_pDocument->GetPageData()->GetImage(pStream));
+    }
+    buf << "/" << PDF_NameEncode(name) << " Do Q\n";
+  }
+}
+
+void CPDF_PageContentGenerator::ProcessForm(CFX_ByteTextBuf& buf,
+                                            const uint8_t* data,
+                                            uint32_t size,
+                                            CFX_Matrix& matrix) {
+  if (!data || !size)
+    return;
+
+  CPDF_Dictionary* pFormDict =
+      new CPDF_Dictionary(m_pDocument->GetByteStringPool());
+  pFormDict->SetNameFor("Type", "XObject");
+  pFormDict->SetNameFor("Subtype", "Form");
+
+  CFX_FloatRect bbox = m_pPage->GetPageBBox();
+  matrix.TransformRect(bbox);
+  pFormDict->SetRectFor("BBox", bbox);
+
+  CPDF_Stream* pStream = new CPDF_Stream;
+  pStream->InitStream(data, size, pFormDict);
+  buf << "q " << matrix << " cm ";
+
+  CFX_ByteString name = RealizeResource(pStream, "XObject");
+  buf << "/" << PDF_NameEncode(name) << " Do Q\n";
+}
+
+void CPDF_PageContentGenerator::TransformContent(CFX_Matrix& matrix) {
+  CPDF_Dictionary* pDict = m_pPage->m_pFormDict;
+  CPDF_Object* pContent =
+      pDict ? pDict->GetDirectObjectFor("Contents") : nullptr;
+  if (!pContent)
+    return;
+
+  CFX_ByteTextBuf buf;
+  if (CPDF_Array* pArray = pContent->AsArray()) {
+    size_t iCount = pArray->GetCount();
+    CPDF_StreamAcc** pContentArray = FX_Alloc(CPDF_StreamAcc*, iCount);
+    size_t size = 0;
+    for (size_t i = 0; i < iCount; ++i) {
+      pContent = pArray->GetObjectAt(i);
+      CPDF_Stream* pStream = ToStream(pContent);
+      if (!pStream)
+        continue;
+
+      CPDF_StreamAcc* pStreamAcc = new CPDF_StreamAcc();
+      pStreamAcc->LoadAllData(pStream);
+      pContentArray[i] = pStreamAcc;
+      size += pContentArray[i]->GetSize() + 1;
+    }
+    int pos = 0;
+    uint8_t* pBuf = FX_Alloc(uint8_t, size);
+    for (size_t i = 0; i < iCount; ++i) {
+      FXSYS_memcpy(pBuf + pos, pContentArray[i]->GetData(),
+                   pContentArray[i]->GetSize());
+      pos += pContentArray[i]->GetSize() + 1;
+      pBuf[pos - 1] = ' ';
+      delete pContentArray[i];
+    }
+    ProcessForm(buf, pBuf, size, matrix);
+    FX_Free(pBuf);
+    FX_Free(pContentArray);
+  } else if (CPDF_Stream* pStream = pContent->AsStream()) {
+    CPDF_StreamAcc contentStream;
+    contentStream.LoadAllData(pStream);
+    ProcessForm(buf, contentStream.GetData(), contentStream.GetSize(), matrix);
+  }
+  CPDF_Stream* pStream = new CPDF_Stream;
+  pStream->SetData(buf.GetBuffer(), buf.GetLength());
+  m_pPage->m_pFormDict->SetReferenceFor(
+      "Contents", m_pDocument, m_pDocument->AddIndirectObject(pStream));
+}
diff --git a/core/fpdfapi/edit/cpdf_pagecontentgenerator.h b/core/fpdfapi/edit/cpdf_pagecontentgenerator.h
new file mode 100644
index 0000000000..21b1b74fe9
--- /dev/null
+++ b/core/fpdfapi/edit/cpdf_pagecontentgenerator.h
@@ -0,0 +1,43 @@
+// Copyright 2016 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#ifndef CORE_FPDFAPI_EDIT_CPDF_PAGECONTENTGENERATOR_H_
+#define CORE_FPDFAPI_EDIT_CPDF_PAGECONTENTGENERATOR_H_
+
+#include "core/fpdfapi/fpdf_parser/cpdf_document.h"
+#include "core/fxcrt/fx_basic.h"
+#include "core/fxcrt/fx_coordinates.h"
+#include "core/fxcrt/fx_system.h"
+
+class CPDF_Object;
+class CPDF_Page;
+class CPDF_PageObject;
+class CPDF_ImageObject;
+
+class CPDF_PageContentGenerator {
+ public:
+  explicit CPDF_PageContentGenerator(CPDF_Page* pPage);
+  ~CPDF_PageContentGenerator();
+
+  FX_BOOL InsertPageObject(CPDF_PageObject* pPageObject);
+  void GenerateContent();
+  void TransformContent(CFX_Matrix& matrix);
+
+ private:
+  void ProcessImage(CFX_ByteTextBuf& buf, CPDF_ImageObject* pImageObj);
+  void ProcessForm(CFX_ByteTextBuf& buf,
+                   const uint8_t* data,
+                   uint32_t size,
+                   CFX_Matrix& matrix);
+  CFX_ByteString RealizeResource(CPDF_Object* pResourceObj,
+                                 const CFX_ByteString& bsType);
+
+  CPDF_Page* m_pPage;
+  CPDF_Document* m_pDocument;
+  CFX_ArrayTemplate<CPDF_PageObject*> m_pageObjects;
+};
+
+#endif  // CORE_FPDFAPI_EDIT_CPDF_PAGECONTENTGENERATOR_H_
diff --git a/core/fpdfapi/edit/editint.h b/core/fpdfapi/edit/editint.h
new file mode 100644
index 0000000000..f1f88f8b09
--- /dev/null
+++ b/core/fpdfapi/edit/editint.h
@@ -0,0 +1,77 @@
+// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#ifndef CORE_FPDFAPI_EDIT_EDITINT_H_
+#define CORE_FPDFAPI_EDIT_EDITINT_H_
+
+#include <vector>
+
+#include "core/fxcrt/fx_basic.h"
+#include "core/fxcrt/fx_stream.h"
+#include "core/fxcrt/fx_system.h"
+
+class CPDF_Creator;
+class CPDF_Object;
+
+class CPDF_ObjectStream {
+ public:
+  struct Item {
+    uint32_t objnum;
+    FX_STRSIZE offset;
+  };
+
+  CPDF_ObjectStream();
+  ~CPDF_ObjectStream();
+
+  void Start();
+  FX_FILESIZE End(CPDF_Creator* pCreator);
+  void CompressIndirectObject(uint32_t dwObjNum, const CPDF_Object* pObj);
+  void CompressIndirectObject(uint32_t dwObjNum,
+                              const uint8_t* pBuffer,
+                              uint32_t dwSize);
+
+  std::vector<Item> m_Items;
+  CFX_ByteTextBuf m_Buffer;
+  uint32_t m_dwObjNum;
+  int32_t m_index;
+};
+
+class CPDF_XRefStream {
+ public:
+  struct Index {
+    uint32_t objnum;
+    uint32_t count;
+  };
+
+  CPDF_XRefStream();
+  ~CPDF_XRefStream();
+
+  FX_BOOL Start();
+  int32_t CompressIndirectObject(uint32_t dwObjNum,
+                                 const CPDF_Object* pObj,
+                                 CPDF_Creator* pCreator);
+  int32_t CompressIndirectObject(uint32_t dwObjNum,
+                                 const uint8_t* pBuffer,
+                                 uint32_t dwSize,
+                                 CPDF_Creator* pCreator);
+  FX_BOOL End(CPDF_Creator* pCreator, FX_BOOL bEOF = FALSE);
+  void AddObjectNumberToIndexArray(uint32_t objnum);
+  FX_BOOL EndXRefStream(CPDF_Creator* pCreator);
+
+  std::vector<Index> m_IndexArray;
+  FX_FILESIZE m_PrevOffset;
+  uint32_t m_dwTempObjNum;
+
+ protected:
+  int32_t EndObjectStream(CPDF_Creator* pCreator, FX_BOOL bEOF = TRUE);
+  FX_BOOL GenerateXRefStream(CPDF_Creator* pCreator, FX_BOOL bEOF);
+
+  size_t m_iSeg;
+  CPDF_ObjectStream m_ObjStream;
+  CFX_ByteTextBuf m_Buffer;
+};
+
+#endif  // CORE_FPDFAPI_EDIT_EDITINT_H_
diff --git a/core/fpdfapi/edit/fpdf_edit_create.cpp b/core/fpdfapi/edit/fpdf_edit_create.cpp
new file mode 100644
index 0000000000..32395a8728
--- /dev/null
+++ b/core/fpdfapi/edit/fpdf_edit_create.cpp
@@ -0,0 +1,2022 @@
+// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#include "core/fpdfapi/edit/editint.h"
+
+#include <vector>
+
+#include "core/fpdfapi/edit/cpdf_creator.h"
+#include "core/fpdfapi/fpdf_parser/cpdf_array.h"
+#include "core/fpdfapi/fpdf_parser/cpdf_crypto_handler.h"
+#include "core/fpdfapi/fpdf_parser/cpdf_dictionary.h"
+#include "core/fpdfapi/fpdf_parser/cpdf_document.h"
+#include "core/fpdfapi/fpdf_parser/cpdf_parser.h"
+#include "core/fpdfapi/fpdf_parser/cpdf_reference.h"
+#include "core/fpdfapi/fpdf_parser/cpdf_security_handler.h"
+#include "core/fpdfapi/fpdf_parser/cpdf_stream.h"
+#include "core/fpdfapi/fpdf_parser/cpdf_stream_acc.h"
+#include "core/fpdfapi/fpdf_parser/cpdf_string.h"
+#include "core/fpdfapi/fpdf_parser/fpdf_parser_decode.h"
+#include "core/fxcrt/fx_ext.h"
+#include "third_party/base/stl_util.h"
+
+#define PDF_OBJECTSTREAM_MAXLENGTH (256 * 1024)
+#define PDF_XREFSTREAM_MAXSIZE 10000
+
+// TODO(ochang): Make helper for appending "objnum 0 R ".
+
+namespace {
+
+int32_t PDF_CreatorAppendObject(const CPDF_Object* pObj,
+                                CFX_FileBufferArchive* pFile,
+                                FX_FILESIZE& offset) {
+  int32_t len = 0;
+  if (!pObj) {
+    if (pFile->AppendString(" null") < 0) {
+      return -1;
+    }
+    offset += 5;
+    return 1;
+  }
+  switch (pObj->GetType()) {
+    case CPDF_Object::NULLOBJ:
+      if (pFile->AppendString(" null") < 0) {
+        return -1;
+      }
+      offset += 5;
+      break;
+    case CPDF_Object::BOOLEAN:
+    case CPDF_Object::NUMBER:
+      if (pFile->AppendString(" ") < 0) {
+        return -1;
+      }
+      if ((len = pFile->AppendString(pObj->GetString().AsStringC())) < 0) {
+        return -1;
+      }
+      offset += len + 1;
+      break;
+    case CPDF_Object::STRING: {
+      CFX_ByteString str = pObj->GetString();
+      FX_BOOL bHex = pObj->AsString()->IsHex();
+      if ((len = pFile->AppendString(PDF_EncodeString(str, bHex).AsStringC())) <
+          0) {
+        return -1;
+      }
+      offset += len;
+      break;
+    }
+    case CPDF_Object::NAME: {
+      if (pFile->AppendString("/") < 0) {
+        return -1;
+      }
+      CFX_ByteString str = pObj->GetString();
+      if ((len = pFile->AppendString(PDF_NameEncode(str).AsStringC())) < 0) {
+        return -1;
+      }
+      offset += len + 1;
+      break;
+    }
+    case CPDF_Object::REFERENCE: {
+      if (pFile->AppendString(" ") < 0)
+        return -1;
+      if ((len = pFile->AppendDWord(pObj->AsReference()->GetRefObjNum())) < 0)
+        return -1;
+      if (pFile->AppendString(" 0 R ") < 0)
+        return -1;
+      offset += len + 6;
+      break;
+    }
+    case CPDF_Object::ARRAY: {
+      if (pFile->AppendString("[") < 0) {
+        return -1;
+      }
+      offset += 1;
+      const CPDF_Array* p = pObj->AsArray();
+      for (size_t i = 0; i < p->GetCount(); i++) {
+        CPDF_Object* pElement = p->GetObjectAt(i);
+        if (pElement->GetObjNum()) {
+          if (pFile->AppendString(" ") < 0) {
+            return -1;
+          }
+          if ((len = pFile->AppendDWord(pElement->GetObjNum())) < 0) {
+            return -1;
+          }
+          if (pFile->AppendString(" 0 R") < 0) {
+            return -1;
+          }
+          offset += len + 5;
+        } else {
+          if (PDF_CreatorAppendObject(pElement, pFile, offset) < 0) {
+            return -1;
+          }
+        }
+      }
+      if (pFile->AppendString("]") < 0) {
+        return -1;
+      }
+      offset += 1;
+      break;
+    }
+    case CPDF_Object::DICTIONARY: {
+      if (pFile->AppendString("<<") < 0) {
+        return -1;
+      }
+      offset += 2;
+      const CPDF_Dictionary* p = pObj->AsDictionary();
+      for (const auto& it : *p) {
+        const CFX_ByteString& key = it.first;
+        CPDF_Object* pValue = it.second;
+        if (pFile->AppendString("/") < 0) {
+          return -1;
+        }
+        if ((len = pFile->AppendString(PDF_NameEncode(key).AsStringC())) < 0) {
+          return -1;
+        }
+        offset += len + 1;
+        if (pValue->GetObjNum()) {
+          if (pFile->AppendString(" ") < 0) {
+            return -1;
+          }
+          if ((len = pFile->AppendDWord(pValue->GetObjNum())) < 0) {
+            return -1;
+          }
+          if (pFile->AppendString(" 0 R") < 0) {
+            return -1;
+          }
+          offset += len + 5;
+        } else {
+          if (PDF_CreatorAppendObject(pValue, pFile, offset) < 0) {
+            return -1;
+          }
+        }
+      }
+      if (pFile->AppendString(">>") < 0) {
+        return -1;
+      }
+      offset += 2;
+      break;
+    }
+    case CPDF_Object::STREAM: {
+      const CPDF_Stream* p = pObj->AsStream();
+      if (PDF_CreatorAppendObject(p->GetDict(), pFile, offset) < 0) {
+        return -1;
+      }
+      if (pFile->AppendString("stream\r\n") < 0) {
+        return -1;
+      }
+      offset += 8;
+      CPDF_StreamAcc acc;
+      acc.LoadAllData(p, TRUE);
+      if (pFile->AppendBlock(acc.GetData(), acc.GetSize()) < 0) {
+        return -1;
+      }
+      offset += acc.GetSize();
+      if ((len = pFile->AppendString("\r\nendstream")) < 0) {
+        return -1;
+      }
+      offset += len;
+      break;
+    }
+    default:
+      ASSERT(FALSE);
+      break;
+  }
+  return 1;
+}
+
+int32_t PDF_CreatorWriteTrailer(CPDF_Document* pDocument,
+                                CFX_FileBufferArchive* pFile,
+                                CPDF_Array* pIDArray) {
+  FX_FILESIZE offset = 0;
+  int32_t len = 0;
+  CPDF_Parser* pParser = pDocument->GetParser();
+  if (pParser) {
+    CPDF_Dictionary* p = pParser->GetTrailer();
+    for (const auto& it : *p) {
+      const CFX_ByteString& key = it.first;
+      CPDF_Object* pValue = it.second;
+      if (key == "Encrypt" || key == "Size" || key == "Filter" ||
+          key == "Index" || key == "Length" || key == "Prev" || key == "W" ||
+          key == "XRefStm" || key == "Type" || key == "ID") {
+        continue;
+      }
+      if (key == "DecodeParms")
+        continue;
+
+      if (pFile->AppendString(("/")) < 0) {
+        return -1;
+      }
+      if ((len = pFile->AppendString(PDF_NameEncode(key).AsStringC())) < 0) {
+        return -1;
+      }
+      offset += len + 1;
+      if (pValue->GetObjNum()) {
+        if (pFile->AppendString(" ") < 0) {
+          return -1;
+        }
+        if ((len = pFile->AppendDWord(pValue->GetObjNum())) < 0) {
+          return -1;
+        }
+        if (pFile->AppendString(" 0 R ") < 0) {
+          return -1;
+        }
+        offset += len + 6;
+      } else {
+        if (PDF_CreatorAppendObject(pValue, pFile, offset) < 0) {
+          return -1;
+        }
+      }
+    }
+    if (pIDArray) {
+      if (pFile->AppendString(("/ID")) < 0) {
+        return -1;
+      }
+      offset += 3;
+      if (PDF_CreatorAppendObject(pIDArray, pFile, offset) < 0) {
+        return -1;
+      }
+    }
+    return offset;
+  }
+  if (pFile->AppendString("\r\n/Root ") < 0) {
+    return -1;
+  }
+  if ((len = pFile->AppendDWord(pDocument->GetRoot()->GetObjNum())) < 0) {
+    return -1;
+  }
+  if (pFile->AppendString(" 0 R\r\n") < 0) {
+    return -1;
+  }
+  offset += len + 14;
+  if (pDocument->GetInfo()) {
+    if (pFile->AppendString("/Info ") < 0) {
+      return -1;
+    }
+    if ((len = pFile->AppendDWord(pDocument->GetInfo()->GetObjNum())) < 0) {
+      return -1;
+    }
+    if (pFile->AppendString(" 0 R\r\n") < 0) {
+      return -1;
+    }
+    offset += len + 12;
+  }
+  if (pIDArray) {
+    if (pFile->AppendString(("/ID")) < 0) {
+      return -1;
+    }
+    offset += 3;
+    if (PDF_CreatorAppendObject(pIDArray, pFile, offset) < 0) {
+      return -1;
+    }
+  }
+  return offset;
+}
+
+int32_t PDF_CreatorWriteEncrypt(const CPDF_Dictionary* pEncryptDict,
+                                uint32_t dwObjNum,
+                                CFX_FileBufferArchive* pFile) {
+  if (!pEncryptDict) {
+    return 0;
+  }
+  ASSERT(pFile);
+  FX_FILESIZE offset = 0;
+  int32_t len = 0;
+  if (pFile->AppendString("/Encrypt") < 0) {
+    return -1;
+  }
+  offset += 8;
+  if (pFile->AppendString(" ") < 0) {
+    return -1;
+  }
+  if ((len = pFile->AppendDWord(dwObjNum)) < 0) {
+    return -1;
+  }
+  if (pFile->AppendString(" 0 R ") < 0) {
+    return -1;
+  }
+  offset += len + 6;
+  return offset;
+}
+
+std::vector<uint8_t> PDF_GenerateFileID(uint32_t dwSeed1, uint32_t dwSeed2) {
+  std::vector<uint8_t> buffer(sizeof(uint32_t) * 4);
+  uint32_t* pBuffer = reinterpret_cast<uint32_t*>(buffer.data());
+  void* pContext = FX_Random_MT_Start(dwSeed1);
+  for (int i = 0; i < 2; ++i)
+    *pBuffer++ = FX_Random_MT_Generate(pContext);
+  FX_Random_MT_Close(pContext);
+  pContext = FX_Random_MT_Start(dwSeed2);
+  for (int i = 0; i < 2; ++i)
+    *pBuffer++ = FX_Random_MT_Generate(pContext);
+  FX_Random_MT_Close(pContext);
+  return buffer;
+}
+
+void AppendIndex0(CFX_ByteTextBuf& buffer, bool bFirstObject) {
+  buffer.AppendByte(0);
+  buffer.AppendByte(0);
+  buffer.AppendByte(0);
+  buffer.AppendByte(0);
+  buffer.AppendByte(0);
+  const uint8_t byte = bFirstObject ? 0xFF : 0;
+  buffer.AppendByte(byte);
+  buffer.AppendByte(byte);
+}
+
+void AppendIndex1(CFX_ByteTextBuf& buffer, FX_FILESIZE offset) {
+  buffer.AppendByte(1);
+  buffer.AppendByte(FX_GETBYTEOFFSET24(offset));
+  buffer.AppendByte(FX_GETBYTEOFFSET16(offset));
+  buffer.AppendByte(FX_GETBYTEOFFSET8(offset));
+  buffer.AppendByte(FX_GETBYTEOFFSET0(offset));
+  buffer.AppendByte(0);
+  buffer.AppendByte(0);
+}
+
+void AppendIndex2(CFX_ByteTextBuf& buffer, uint32_t objnum, int32_t index) {
+  buffer.AppendByte(2);
+  buffer.AppendByte(FX_GETBYTEOFFSET24(objnum));
+  buffer.AppendByte(FX_GETBYTEOFFSET16(objnum));
+  buffer.AppendByte(FX_GETBYTEOFFSET8(objnum));
+  buffer.AppendByte(FX_GETBYTEOFFSET0(objnum));
+  buffer.AppendByte(FX_GETBYTEOFFSET8(index));
+  buffer.AppendByte(FX_GETBYTEOFFSET0(index));
+}
+
+bool IsXRefNeedEnd(CPDF_XRefStream* pXRef, uint32_t flag) {
+  if (!(flag & FPDFCREATE_INCREMENTAL))
+    return false;
+
+  uint32_t iCount = 0;
+  for (const auto& pair : pXRef->m_IndexArray)
+    iCount += pair.count;
+
+  return iCount >= PDF_XREFSTREAM_MAXSIZE;
+}
+
+int32_t OutputIndex(CFX_FileBufferArchive* pFile, FX_FILESIZE offset) {
+  if (sizeof(offset) > 4) {
+    if (FX_GETBYTEOFFSET32(offset)) {
+      if (pFile->AppendByte(FX_GETBYTEOFFSET56(offset)) < 0)
+        return -1;
+      if (pFile->AppendByte(FX_GETBYTEOFFSET48(offset)) < 0)
+        return -1;
+      if (pFile->AppendByte(FX_GETBYTEOFFSET40(offset)) < 0)
+        return -1;
+      if (pFile->AppendByte(FX_GETBYTEOFFSET32(offset)) < 0)
+        return -1;
+    }
+  }
+  if (pFile->AppendByte(FX_GETBYTEOFFSET24(offset)) < 0)
+    return -1;
+  if (pFile->AppendByte(FX_GETBYTEOFFSET16(offset)) < 0)
+    return -1;
+  if (pFile->AppendByte(FX_GETBYTEOFFSET8(offset)) < 0)
+    return -1;
+  if (pFile->AppendByte(FX_GETBYTEOFFSET0(offset)) < 0)
+    return -1;
+  if (pFile->AppendByte(0) < 0)
+    return -1;
+  return 0;
+}
+
+class CPDF_FlateEncoder {
+ public:
+  CPDF_FlateEncoder(CPDF_Stream* pStream, FX_BOOL bFlateEncode);
+  CPDF_FlateEncoder(const uint8_t* pBuffer,
+                    uint32_t size,
+                    bool bFlateEncode,
+                    bool bXRefStream);
+  ~CPDF_FlateEncoder();
+
+  void CloneDict();
+
+  uint8_t* m_pData;
+  uint32_t m_dwSize;
+  CPDF_Dictionary* m_pDict;
+  FX_BOOL m_bCloned;
+  FX_BOOL m_bNewData;
+  CPDF_StreamAcc m_Acc;
+};
+
+void CPDF_FlateEncoder::CloneDict() {
+  if (!m_bCloned) {
+    m_pDict = ToDictionary(m_pDict->Clone());
+    ASSERT(m_pDict);
+    m_bCloned = TRUE;
+  }
+}
+
+CPDF_FlateEncoder::CPDF_FlateEncoder(CPDF_Stream* pStream, FX_BOOL bFlateEncode)
+    : m_pData(nullptr),
+      m_dwSize(0),
+      m_pDict(nullptr),
+      m_bCloned(FALSE),
+      m_bNewData(FALSE) {
+  m_Acc.LoadAllData(pStream, TRUE);
+  if ((pStream && pStream->GetDict() &&
+       pStream->GetDict()->KeyExist("Filter")) ||
+      !bFlateEncode) {
+    if (pStream->GetDict()->KeyExist("Filter") && !bFlateEncode) {
+      CPDF_StreamAcc destAcc;
+      destAcc.LoadAllData(pStream);
+      m_dwSize = destAcc.GetSize();
+      m_pData = (uint8_t*)destAcc.DetachData();
+      m_pDict = ToDictionary(pStream->GetDict()->Clone());
+      m_pDict->RemoveFor("Filter");
+      m_bNewData = TRUE;
+      m_bCloned = TRUE;
+    } else {
+      m_pData = (uint8_t*)m_Acc.GetData();
+      m_dwSize = m_Acc.GetSize();
+      m_pDict = pStream->GetDict();
+    }
+    return;
+  }
+
+  m_bNewData = TRUE;
+  m_bCloned = TRUE;
+  // TODO(thestig): Move to Init() and check return value.
+  ::FlateEncode(m_Acc.GetData(), m_Acc.GetSize(), &m_pData, &m_dwSize);
+  m_pDict = ToDictionary(pStream->GetDict()->Clone());
+  m_pDict->SetIntegerFor("Length", m_dwSize);
+  m_pDict->SetNameFor("Filter", "FlateDecode");
+  m_pDict->RemoveFor("DecodeParms");
+}
+
+CPDF_FlateEncoder::CPDF_FlateEncoder(const uint8_t* pBuffer,
+                                     uint32_t size,
+                                     bool bFlateEncode,
+                                     bool bXRefStream)
+    : m_pData(nullptr),
+      m_dwSize(0),
+      m_pDict(nullptr),
+      m_bCloned(FALSE),
+      m_bNewData(FALSE) {
+  if (!bFlateEncode) {
+    m_pData = (uint8_t*)pBuffer;
+    m_dwSize = size;
+    return;
+  }
+  m_bNewData = TRUE;
+  // TODO(thestig): Move to Init() and check return value.
+  if (bXRefStream)
+    ::PngEncode(pBuffer, size, &m_pData, &m_dwSize);
+  else
+    ::FlateEncode(pBuffer, size, &m_pData, &m_dwSize);
+}
+
+CPDF_FlateEncoder::~CPDF_FlateEncoder() {
+  if (m_bCloned && m_pDict)
+    m_pDict->Release();
+  if (m_bNewData)
+    FX_Free(m_pData);
+}
+
+class CPDF_Encryptor {
+ public:
+  CPDF_Encryptor(CPDF_CryptoHandler* pHandler,
+                 int objnum,
+                 uint8_t* src_data,
+                 uint32_t src_size);
+  ~CPDF_Encryptor();
+
+  uint8_t* m_pData;
+  uint32_t m_dwSize;
+  FX_BOOL m_bNewBuf;
+};
+
+CPDF_Encryptor::CPDF_Encryptor(CPDF_CryptoHandler* pHandler,
+                               int objnum,
+                               uint8_t* src_data,
+                               uint32_t src_size)
+    : m_pData(nullptr), m_dwSize(0), m_bNewBuf(FALSE) {
+  if (src_size == 0)
+    return;
+
+  if (!pHandler) {
+    m_pData = (uint8_t*)src_data;
+    m_dwSize = src_size;
+    return;
+  }
+  m_dwSize = pHandler->EncryptGetSize(objnum, 0, src_data, src_size);
+  m_pData = FX_Alloc(uint8_t, m_dwSize);
+  pHandler->EncryptContent(objnum, 0, src_data, src_size, m_pData, m_dwSize);
+  m_bNewBuf = TRUE;
+}
+
+CPDF_Encryptor::~CPDF_Encryptor() {
+  if (m_bNewBuf)
+    FX_Free(m_pData);
+}
+
+}  // namespace
+
+CPDF_ObjectStream::CPDF_ObjectStream() : m_dwObjNum(0), m_index(0) {}
+
+CPDF_ObjectStream::~CPDF_ObjectStream() {}
+
+void CPDF_ObjectStream::Start() {
+  m_Items.clear();
+  m_Buffer.Clear();
+  m_dwObjNum = 0;
+  m_index = 0;
+}
+
+void CPDF_ObjectStream::CompressIndirectObject(uint32_t dwObjNum,
+                                               const CPDF_Object* pObj) {
+  m_Items.push_back({dwObjNum, m_Buffer.GetLength()});
+  m_Buffer << pObj;
+}
+
+void CPDF_ObjectStream::CompressIndirectObject(uint32_t dwObjNum,
+                                               const uint8_t* pBuffer,
+                                               uint32_t dwSize) {
+  m_Items.push_back({dwObjNum, m_Buffer.GetLength()});
+  m_Buffer.AppendBlock(pBuffer, dwSize);
+}
+
+FX_FILESIZE CPDF_ObjectStream::End(CPDF_Creator* pCreator) {
+  ASSERT(pCreator);
+  if (m_Items.empty())
+    return 0;
+
+  CFX_FileBufferArchive* pFile = &pCreator->m_File;
+  FX_FILESIZE ObjOffset = pCreator->m_Offset;
+  if (!m_dwObjNum) {
+    m_dwObjNum = ++pCreator->m_dwLastObjNum;
+  }
+  CFX_ByteTextBuf tempBuffer;
+  for (const auto& pair : m_Items)
+    tempBuffer << pair.objnum << " " << pair.offset << " ";
+
+  FX_FILESIZE& offset = pCreator->m_Offset;
+  int32_t len = pFile->AppendDWord(m_dwObjNum);
+  if (len < 0) {
+    return -1;
+  }
+  offset += len;
+  if ((len = pFile->AppendString(" 0 obj\r\n<</Type /ObjStm /N ")) < 0) {
+    return -1;
+  }
+  offset += len;
+  uint32_t iCount = pdfium::CollectionSize<uint32_t>(m_Items);
+  if ((len = pFile->AppendDWord(iCount)) < 0) {
+    return -1;
+  }
+  offset += len;
+  if (pFile->AppendString("/First ") < 0) {
+    return -1;
+  }
+  if ((len = pFile->AppendDWord((uint32_t)tempBuffer.GetLength())) < 0) {
+    return -1;
+  }
+  if (pFile->AppendString("/Length ") < 0) {
+    return -1;
+  }
+  offset += len + 15;
+
+  tempBuffer << m_Buffer;
+  CPDF_FlateEncoder encoder(tempBuffer.GetBuffer(), tempBuffer.GetLength(),
+                            true, false);
+  CPDF_Encryptor encryptor(pCreator->m_pCryptoHandler, m_dwObjNum,
+                           encoder.m_pData, encoder.m_dwSize);
+  if ((len = pFile->AppendDWord(encryptor.m_dwSize)) < 0) {
+    return -1;
+  }
+  offset += len;
+  if (pFile->AppendString("/Filter /FlateDecode") < 0) {
+    return -1;
+  }
+  offset += 20;
+  if ((len = pFile->AppendString(">>stream\r\n")) < 0) {
+    return -1;
+  }
+  if (pFile->AppendBlock(encryptor.m_pData, encryptor.m_dwSize) < 0) {
+    return -1;
+  }
+  offset += len + encryptor.m_dwSize;
+  if ((len = pFile->AppendString("\r\nendstream\r\nendobj\r\n")) < 0) {
+    return -1;
+  }
+  offset += len;
+  return ObjOffset;
+}
+
+CPDF_XRefStream::CPDF_XRefStream()
+    : m_PrevOffset(0), m_dwTempObjNum(0), m_iSeg(0) {}
+
+CPDF_XRefStream::~CPDF_XRefStream() {}
+
+FX_BOOL CPDF_XRefStream::Start() {
+  m_IndexArray.clear();
+  m_Buffer.Clear();
+  m_iSeg = 0;
+  return TRUE;
+}
+int32_t CPDF_XRefStream::CompressIndirectObject(uint32_t dwObjNum,
+                                                const CPDF_Object* pObj,
+                                                CPDF_Creator* pCreator) {
+  if (!pCreator)
+    return 0;
+
+  m_ObjStream.CompressIndirectObject(dwObjNum, pObj);
+  if (pdfium::CollectionSize<int32_t>(m_ObjStream.m_Items) <
+          pCreator->m_ObjectStreamSize &&
+      m_ObjStream.m_Buffer.GetLength() < PDF_OBJECTSTREAM_MAXLENGTH) {
+    return 1;
+  }
+  return EndObjectStream(pCreator);
+}
+int32_t CPDF_XRefStream::CompressIndirectObject(uint32_t dwObjNum,
+                                                const uint8_t* pBuffer,
+                                                uint32_t dwSize,
+                                                CPDF_Creator* pCreator) {
+  if (!pCreator)
+    return 0;
+
+  m_ObjStream.CompressIndirectObject(dwObjNum, pBuffer, dwSize);
+  if (pdfium::CollectionSize<int32_t>(m_ObjStream.m_Items) <
+          pCreator->m_ObjectStreamSize &&
+      m_ObjStream.m_Buffer.GetLength() < PDF_OBJECTSTREAM_MAXLENGTH) {
+    return 1;
+  }
+  return EndObjectStream(pCreator);
+}
+
+int32_t CPDF_XRefStream::EndObjectStream(CPDF_Creator* pCreator, FX_BOOL bEOF) {
+  FX_FILESIZE objOffset = 0;
+  if (bEOF) {
+    objOffset = m_ObjStream.End(pCreator);
+    if (objOffset < 0) {
+      return -1;
+    }
+  }
+  uint32_t& dwObjStmNum = m_ObjStream.m_dwObjNum;
+  if (!dwObjStmNum) {
+    dwObjStmNum = ++pCreator->m_dwLastObjNum;
+  }
+  int32_t iSize = pdfium::CollectionSize<int32_t>(m_ObjStream.m_Items);
+  size_t iSeg = m_IndexArray.size();
+  if (!(pCreator->m_dwFlags & FPDFCREATE_INCREMENTAL)) {
+    if (m_dwTempObjNum == 0) {
+      AppendIndex0(m_Buffer, true);
+      m_dwTempObjNum++;
+    }
+    uint32_t end_num = m_IndexArray.back().objnum + m_IndexArray.back().count;
+    int index = 0;
+    for (; m_dwTempObjNum < end_num; m_dwTempObjNum++) {
+      FX_FILESIZE* offset = pCreator->m_ObjectOffset.GetPtrAt(m_dwTempObjNum);
+      if (offset) {
+        if (index >= iSize ||
+            m_dwTempObjNum != m_ObjStream.m_Items[index].objnum) {
+          AppendIndex1(m_Buffer, *offset);
+        } else {
+          AppendIndex2(m_Buffer, dwObjStmNum, index++);
+        }
+      } else {
+        AppendIndex0(m_Buffer, false);
+      }
+    }
+    if (iSize > 0 && bEOF) {
+      pCreator->m_ObjectOffset.Add(dwObjStmNum, 1);
+      pCreator->m_ObjectOffset[dwObjStmNum] = objOffset;
+    }
+    m_iSeg = iSeg;
+    if (bEOF) {
+      m_ObjStream.Start();
+    }
+    return 1;
+  }
+  for (auto it = m_IndexArray.begin() + m_iSeg; it != m_IndexArray.end();
+       ++it) {
+    for (uint32_t m = it->objnum; m < it->objnum + it->count; ++m) {
+      if (m_ObjStream.m_index >= iSize ||
+          m != m_ObjStream.m_Items[it - m_IndexArray.begin()].objnum) {
+        AppendIndex1(m_Buffer, pCreator->m_ObjectOffset[m]);
+      } else {
+        AppendIndex2(m_Buffer, dwObjStmNum, m_ObjStream.m_index++);
+      }
+    }
+  }
+  if (iSize > 0 && bEOF) {
+    AppendIndex1(m_Buffer, objOffset);
+    m_IndexArray.push_back({dwObjStmNum, 1});
+    iSeg += 1;
+  }
+  m_iSeg = iSeg;
+  if (bEOF) {
+    m_ObjStream.Start();
+  }
+  return 1;
+}
+FX_BOOL CPDF_XRefStream::GenerateXRefStream(CPDF_Creator* pCreator,
+                                            FX_BOOL bEOF) {
+  FX_FILESIZE offset_tmp = pCreator->m_Offset;
+  uint32_t objnum = ++pCreator->m_dwLastObjNum;
+  CFX_FileBufferArchive* pFile = &pCreator->m_File;
+  FX_BOOL bIncremental = (pCreator->m_dwFlags & FPDFCREATE_INCREMENTAL) != 0;
+  if (bIncremental) {
+    AddObjectNumberToIndexArray(objnum);
+  } else {
+    for (; m_dwTempObjNum < pCreator->m_dwLastObjNum; m_dwTempObjNum++) {
+      FX_FILESIZE* offset = pCreator->m_ObjectOffset.GetPtrAt(m_dwTempObjNum);
+      if (offset) {
+        AppendIndex1(m_Buffer, *offset);
+      } else {
+        AppendIndex0(m_Buffer, false);
+      }
+    }
+  }
+  AppendIndex1(m_Buffer, offset_tmp);
+  FX_FILESIZE& offset = pCreator->m_Offset;
+  int32_t len = pFile->AppendDWord(objnum);
+  if (len < 0) {
+    return FALSE;
+  }
+  offset += len;
+  if ((len = pFile->AppendString(" 0 obj\r\n<</Type /XRef/W[1 4 2]/Index[")) <
+      0) {
+    return FALSE;
+  }
+  offset += len;
+  if (!bIncremental) {
+    if ((len = pFile->AppendDWord(0)) < 0) {
+      return FALSE;
+    }
+    if ((len = pFile->AppendString(" ")) < 0) {
+      return FALSE;
+    }
+    offset += len + 1;
+    if ((len = pFile->AppendDWord(objnum + 1)) < 0) {
+      return FALSE;
+    }
+    offset += len;
+  } else {
+    for (const auto& pair : m_IndexArray) {
+      if ((len = pFile->AppendDWord(pair.objnum)) < 0) {
+        return FALSE;
+      }
+      if (pFile->AppendString(" ") < 0) {
+        return FALSE;
+      }
+      offset += len + 1;
+      if ((len = pFile->AppendDWord(pair.count)) < 0) {
+        return FALSE;
+      }
+      if (pFile->AppendString(" ") < 0) {
+        return FALSE;
+      }
+      offset += len + 1;
+    }
+  }
+  if (pFile->AppendString("]/Size ") < 0) {
+    return FALSE;
+  }
+  if ((len = pFile->AppendDWord(objnum + 1)) < 0) {
+    return FALSE;
+  }
+  offset += len + 7;
+  if (m_PrevOffset > 0) {
+    if (pFile->AppendString("/Prev ") < 0) {
+      return FALSE;
+    }
+    FX_CHAR offset_buf[20];
+    FXSYS_memset(offset_buf, 0, sizeof(offset_buf));
+    FXSYS_i64toa(m_PrevOffset, offset_buf, 10);
+    int32_t offset_len = (int32_t)FXSYS_strlen(offset_buf);
+    if (pFile->AppendBlock(offset_buf, offset_len) < 0) {
+      return FALSE;
+    }
+    offset += offset_len + 6;
+  }
+  CPDF_FlateEncoder encoder(m_Buffer.GetBuffer(), m_Buffer.GetLength(), TRUE,
+                            TRUE);
+  if (pFile->AppendString("/Filter /FlateDecode") < 0)
+    return FALSE;
+
+  offset += 20;
+  if ((len = pFile->AppendString("/DecodeParms<</Columns 7/Predictor 12>>")) <
+      0) {
+    return FALSE;
+  }
+
+  offset += len;
+  if (pFile->AppendString("/Length ") < 0)
+    return FALSE;
+
+  if ((len = pFile->AppendDWord(encoder.m_dwSize)) < 0)
+    return FALSE;
+
+  offset += len + 8;
+  if (bEOF) {
+    if ((len = PDF_CreatorWriteTrailer(pCreator->m_pDocument, pFile,
+                                       pCreator->m_pIDArray.get())) < 0) {
+      return FALSE;
+    }
+    offset += len;
+    if (pCreator->m_pEncryptDict) {
+      uint32_t dwEncryptObjNum = pCreator->m_pEncryptDict->GetObjNum();
+      if (dwEncryptObjNum == 0) {
+        dwEncryptObjNum = pCreator->m_dwEncryptObjNum;
+      }
+      if ((len = PDF_CreatorWriteEncrypt(pCreator->m_pEncryptDict,
+                                         dwEncryptObjNum, pFile)) < 0) {
+        return FALSE;
+      }
+      offset += len;
+    }
+  }
+  if ((len = pFile->AppendString(">>stream\r\n")) < 0) {
+    return FALSE;
+  }
+  offset += len;
+  if (pFile->AppendBlock(encoder.m_pData, encoder.m_dwSize) < 0) {
+    return FALSE;
+  }
+  if ((len = pFile->AppendString("\r\nendstream\r\nendobj\r\n")) < 0) {
+    return FALSE;
+  }
+  offset += encoder.m_dwSize + len;
+  m_PrevOffset = offset_tmp;
+  return TRUE;
+}
+FX_BOOL CPDF_XRefStream::End(CPDF_Creator* pCreator, FX_BOOL bEOF) {
+  if (EndObjectStream(pCreator, bEOF) < 0) {
+    return FALSE;
+  }
+  return GenerateXRefStream(pCreator, bEOF);
+}
+FX_BOOL CPDF_XRefStream::EndXRefStream(CPDF_Creator* pCreator) {
+  if (!(pCreator->m_dwFlags & FPDFCREATE_INCREMENTAL)) {
+    AppendIndex0(m_Buffer, true);
+    for (uint32_t i = 1; i < pCreator->m_dwLastObjNum + 1; i++) {
+      FX_FILESIZE* offset = pCreator->m_ObjectOffset.GetPtrAt(i);
+      if (offset) {
+        AppendIndex1(m_Buffer, *offset);
+      } else {
+        AppendIndex0(m_Buffer, false);
+      }
+    }
+  } else {
+    for (const auto& pair : m_IndexArray) {
+      for (uint32_t j = pair.objnum; j < pair.objnum + pair.count; ++j)
+        AppendIndex1(m_Buffer, pCreator->m_ObjectOffset[j]);
+    }
+  }
+  return GenerateXRefStream(pCreator, FALSE);
+}
+void CPDF_XRefStream::AddObjectNumberToIndexArray(uint32_t objnum) {
+  if (m_IndexArray.empty()) {
+    m_IndexArray.push_back({objnum, 1});
+    return;
+  }
+  uint32_t next_objnum = m_IndexArray.back().objnum + m_IndexArray.back().count;
+  if (objnum == next_objnum)
+    m_IndexArray.back().count += 1;
+  else
+    m_IndexArray.push_back({objnum, 1});
+}
+
+CPDF_Creator::CPDF_Creator(CPDF_Document* pDoc)
+    : m_pDocument(pDoc),
+      m_pParser(pDoc->GetParser()),
+      m_bSecurityChanged(FALSE),
+      m_pEncryptDict(m_pParser ? m_pParser->GetEncryptDict() : nullptr),
+      m_dwEncryptObjNum(0),
+      m_bEncryptCloned(FALSE),
+      m_pCryptoHandler(m_pParser ? m_pParser->GetCryptoHandler() : nullptr),
+      m_bLocalCryptoHandler(FALSE),
+      m_pMetadata(nullptr),
+      m_ObjectStreamSize(200),
+      m_dwLastObjNum(m_pDocument->GetLastObjNum()),
+      m_Offset(0),
+      m_iStage(-1),
+      m_dwFlags(0),
+      m_Pos(nullptr),
+      m_XrefStart(0),
+      m_pIDArray(nullptr),
+      m_FileVersion(0) {}
+
+CPDF_Creator::~CPDF_Creator() {
+  ResetStandardSecurity();
+  if (m_bEncryptCloned && m_pEncryptDict) {
+    m_pEncryptDict->Release();
+    m_pEncryptDict = nullptr;
+  }
+  Clear();
+}
+
+int32_t CPDF_Creator::WriteIndirectObjectToStream(const CPDF_Object* pObj) {
+  if (!m_pXRefStream)
+    return 1;
+
+  uint32_t objnum = pObj->GetObjNum();
+  if (m_pParser && m_pParser->GetObjectGenNum(objnum) > 0)
+    return 1;
+
+  if (pObj->IsNumber())
+    return 1;
+
+  CPDF_Dictionary* pDict = pObj->GetDict();
+  if (pObj->IsStream()) {
+    if (pDict && pDict->GetStringFor("Type") == "XRef")
+      return 0;
+    return 1;
+  }
+
+  if (pDict) {
+    if (pDict == m_pDocument->GetRoot() || pDict == m_pEncryptDict)
+      return 1;
+    if (pDict->IsSignatureDict())
+      return 1;
+    if (pDict->GetStringFor("Type") == "Page")
+      return 1;
+  }
+
+  m_pXRefStream->AddObjectNumberToIndexArray(objnum);
+  if (m_pXRefStream->CompressIndirectObject(objnum, pObj, this) < 0)
+    return -1;
+  if (!IsXRefNeedEnd(m_pXRefStream.get(), m_dwFlags))
+    return 0;
+  if (!m_pXRefStream->End(this))
+    return -1;
+  if (!m_pXRefStream->Start())
+    return -1;
+  return 0;
+}
+int32_t CPDF_Creator::WriteIndirectObjectToStream(uint32_t objnum,
+                                                  const uint8_t* pBuffer,
+                                                  uint32_t dwSize) {
+  if (!m_pXRefStream) {
+    return 1;
+  }
+  m_pXRefStream->AddObjectNumberToIndexArray(objnum);
+  int32_t iRet =
+      m_pXRefStream->CompressIndirectObject(objnum, pBuffer, dwSize, this);
+  if (iRet < 1) {
+    return iRet;
+  }
+  if (!IsXRefNeedEnd(m_pXRefStream.get(), m_dwFlags)) {
+    return 0;
+  }
+  if (!m_pXRefStream->End(this)) {
+    return -1;
+  }
+  if (!m_pXRefStream->Start()) {
+    return -1;
+  }
+  return 0;
+}
+int32_t CPDF_Creator::AppendObjectNumberToXRef(uint32_t objnum) {
+  if (!m_pXRefStream) {
+    return 1;
+  }
+  m_pXRefStream->AddObjectNumberToIndexArray(objnum);
+  if (!IsXRefNeedEnd(m_pXRefStream.get(), m_dwFlags)) {
+    return 0;
+  }
+  if (!m_pXRefStream->End(this)) {
+    return -1;
+  }
+  if (!m_pXRefStream->Start()) {
+    return -1;
+  }
+  return 0;
+}
+int32_t CPDF_Creator::WriteStream(const CPDF_Object* pStream,
+                                  uint32_t objnum,
+                                  CPDF_CryptoHandler* pCrypto) {
+  CPDF_FlateEncoder encoder(const_cast<CPDF_Stream*>(pStream->AsStream()),
+                            pStream != m_pMetadata);
+  CPDF_Encryptor encryptor(pCrypto, objnum, encoder.m_pData, encoder.m_dwSize);
+  if ((uint32_t)encoder.m_pDict->GetIntegerFor("Length") !=
+      encryptor.m_dwSize) {
+    encoder.CloneDict();
+    encoder.m_pDict->SetIntegerFor("Length", encryptor.m_dwSize);
+  }
+  if (WriteDirectObj(objnum, encoder.m_pDict) < 0) {
+    return -1;
+  }
+  int len = m_File.AppendString("stream\r\n");
+  if (len < 0) {
+    return -1;
+  }
+  m_Offset += len;
+  if (m_File.AppendBlock(encryptor.m_pData, encryptor.m_dwSize) < 0) {
+    return -1;
+  }
+  m_Offset += encryptor.m_dwSize;
+  if ((len = m_File.AppendString("\r\nendstream")) < 0) {
+    return -1;
+  }
+  m_Offset += len;
+  return 1;
+}
+int32_t CPDF_Creator::WriteIndirectObj(uint32_t objnum,
+                                       const CPDF_Object* pObj) {
+  int32_t len = m_File.AppendDWord(objnum);
+  if (len < 0)
+    return -1;
+
+  m_Offset += len;
+  if ((len = m_File.AppendString(" 0 obj\r\n")) < 0)
+    return -1;
+
+  m_Offset += len;
+  if (pObj->IsStream()) {
+    CPDF_CryptoHandler* pHandler =
+        pObj != m_pMetadata ? m_pCryptoHandler : nullptr;
+    if (WriteStream(pObj, objnum, pHandler) < 0)
+      return -1;
+  } else {
+    if (WriteDirectObj(objnum, pObj) < 0)
+      return -1;
+  }
+  if ((len = m_File.AppendString("\r\nendobj\r\n")) < 0)
+    return -1;
+
+  m_Offset += len;
+  if (AppendObjectNumberToXRef(objnum) < 0)
+    return -1;
+  return 0;
+}
+int32_t CPDF_Creator::WriteIndirectObj(const CPDF_Object* pObj) {
+  int32_t iRet = WriteIndirectObjectToStream(pObj);
+  if (iRet < 1) {
+    return iRet;
+  }
+  return WriteIndirectObj(pObj->GetObjNum(), pObj);
+}
+int32_t CPDF_Creator::WriteDirectObj(uint32_t objnum,
+                                     const CPDF_Object* pObj,
+                                     FX_BOOL bEncrypt) {
+  int32_t len = 0;
+  if (!pObj) {
+    if (m_File.AppendString(" null") < 0) {
+      return -1;
+    }
+    m_Offset += 5;
+    return 1;
+  }
+  switch (pObj->GetType()) {
+    case CPDF_Object::NULLOBJ:
+      if (m_File.AppendString(" null") < 0) {
+        return -1;
+      }
+      m_Offset += 5;
+      break;
+    case CPDF_Object::BOOLEAN:
+    case CPDF_Object::NUMBER:
+      if (m_File.AppendString(" ") < 0) {
+        return -1;
+      }
+      if ((len = m_File.AppendString(pObj->GetString().AsStringC())) < 0) {
+        return -1;
+      }
+      m_Offset += len + 1;
+      break;
+    case CPDF_Object::STRING: {
+      CFX_ByteString str = pObj->GetString();
+      FX_BOOL bHex = pObj->AsString()->IsHex();
+      if (!m_pCryptoHandler || !bEncrypt) {
+        CFX_ByteString content = PDF_EncodeString(str, bHex);
+        if ((len = m_File.AppendString(content.AsStringC())) < 0) {
+          return -1;
+        }
+        m_Offset += len;
+        break;
+      }
+      CPDF_Encryptor encryptor(m_pCryptoHandler, objnum, (uint8_t*)str.c_str(),
+                               str.GetLength());
+      CFX_ByteString content = PDF_EncodeString(
+          CFX_ByteString((const FX_CHAR*)encryptor.m_pData, encryptor.m_dwSize),
+          bHex);
+      if ((len = m_File.AppendString(content.AsStringC())) < 0) {
+        return -1;
+      }
+      m_Offset += len;
+      break;
+    }
+    case CPDF_Object::STREAM: {
+      CPDF_FlateEncoder encoder(const_cast<CPDF_Stream*>(pObj->AsStream()),
+                                TRUE);
+      CPDF_Encryptor encryptor(m_pCryptoHandler, objnum, encoder.m_pData,
+                               encoder.m_dwSize);
+      if ((uint32_t)encoder.m_pDict->GetIntegerFor("Length") !=
+          encryptor.m_dwSize) {
+        encoder.CloneDict();
+        encoder.m_pDict->SetIntegerFor("Length", encryptor.m_dwSize);
+      }
+      if (WriteDirectObj(objnum, encoder.m_pDict) < 0) {
+        return -1;
+      }
+      if ((len = m_File.AppendString("stream\r\n")) < 0) {
+        return -1;
+      }
+      m_Offset += len;
+      if (m_File.AppendBlock(encryptor.m_pData, encryptor.m_dwSize) < 0) {
+        return -1;
+      }
+      m_Offset += encryptor.m_dwSize;
+      if ((len = m_File.AppendString("\r\nendstream")) < 0) {
+        return -1;
+      }
+      m_Offset += len;
+      break;
+    }
+    case CPDF_Object::NAME: {
+      if (m_File.AppendString("/") < 0) {
+        return -1;
+      }
+      CFX_ByteString str = pObj->GetString();
+      if ((len = m_File.AppendString(PDF_NameEncode(str).AsStringC())) < 0) {
+        return -1;
+      }
+      m_Offset += len + 1;
+      break;
+    }
+    case CPDF_Object::REFERENCE: {
+      if (m_File.AppendString(" ") < 0)
+        return -1;
+      if ((len = m_File.AppendDWord(pObj->AsReference()->GetRefObjNum())) < 0)
+        return -1;
+      if (m_File.AppendString(" 0 R") < 0)
+        return -1;
+      m_Offset += len + 5;
+      break;
+    }
+    case CPDF_Object::ARRAY: {
+      if (m_File.AppendString("[") < 0) {
+        return -1;
+      }
+      m_Offset += 1;
+      const CPDF_Array* p = pObj->AsArray();
+      for (size_t i = 0; i < p->GetCount(); i++) {
+        CPDF_Object* pElement = p->GetObjectAt(i);
+        if (pElement->GetObjNum()) {
+          if (m_File.AppendString(" ") < 0) {
+            return -1;
+          }
+          if ((len = m_File.AppendDWord(pElement->GetObjNum())) < 0) {
+            return -1;
+          }
+          if (m_File.AppendString(" 0 R") < 0) {
+            return -1;
+          }
+          m_Offset += len + 5;
+        } else {
+          if (WriteDirectObj(objnum, pElement) < 0) {
+            return -1;
+          }
+        }
+      }
+      if (m_File.AppendString("]") < 0) {
+        return -1;
+      }
+      m_Offset += 1;
+      break;
+    }
+    case CPDF_Object::DICTIONARY: {
+      if (!m_pCryptoHandler || pObj == m_pEncryptDict)
+        return PDF_CreatorAppendObject(pObj, &m_File, m_Offset);
+      if (m_File.AppendString("<<") < 0)
+        return -1;
+
+      m_Offset += 2;
+      const CPDF_Dictionary* p = pObj->AsDictionary();
+      bool bSignDict = p->IsSignatureDict();
+      for (const auto& it : *p) {
+        FX_BOOL bSignValue = FALSE;
+        const CFX_ByteString& key = it.first;
+        CPDF_Object* pValue = it.second;
+        if (m_File.AppendString("/") < 0) {
+          return -1;
+        }
+        if ((len = m_File.AppendString(PDF_NameEncode(key).AsStringC())) < 0) {
+          return -1;
+        }
+        m_Offset += len + 1;
+        if (bSignDict && key == "Contents") {
+          bSignValue = TRUE;
+        }
+        if (pValue->GetObjNum()) {
+          if (m_File.AppendString(" ") < 0) {
+            return -1;
+          }
+          if ((len = m_File.AppendDWord(pValue->GetObjNum())) < 0) {
+            return -1;
+          }
+          if (m_File.AppendString(" 0 R ") < 0) {
+            return -1;
+          }
+          m_Offset += len + 6;
+        } else {
+          if (WriteDirectObj(objnum, pValue, !bSignValue) < 0) {
+            return -1;
+          }
+        }
+      }
+      if (m_File.AppendString(">>") < 0) {
+        return -1;
+      }
+      m_Offset += 2;
+      break;
+    }
+  }
+  return 1;
+}
+int32_t CPDF_Creator::WriteOldIndirectObject(uint32_t objnum) {
+  if (m_pParser->IsObjectFreeOrNull(objnum))
+    return 0;
+
+  m_ObjectOffset[objnum] = m_Offset;
+  FX_BOOL bExistInMap = !!m_pDocument->GetIndirectObject(objnum);
+  const uint8_t object_type = m_pParser->GetObjectType(objnum);
+  bool bObjStm = (object_type == 2) && m_pEncryptDict && !m_pXRefStream;
+  if (m_pParser->IsVersionUpdated() || m_bSecurityChanged || bExistInMap ||
+      bObjStm) {
+    CPDF_Object* pObj = m_pDocument->GetOrParseIndirectObject(objnum);
+    if (!pObj) {
+      m_ObjectOffset[objnum] = 0;
+      return 0;
+    }
+    if (WriteIndirectObj(pObj)) {
+      return -1;
+    }
+    if (!bExistInMap) {
+      m_pDocument->ReleaseIndirectObject(objnum);
+    }
+  } else {
+    uint8_t* pBuffer;
+    uint32_t size;
+    m_pParser->GetIndirectBinary(objnum, pBuffer, size);
+    if (!pBuffer) {
+      return 0;
+    }
+    if (object_type == 2) {
+      if (m_pXRefStream) {
+        if (WriteIndirectObjectToStream(objnum, pBuffer, size) < 0) {
+          FX_Free(pBuffer);
+          return -1;
+        }
+      } else {
+        int32_t len = m_File.AppendDWord(objnum);
+        if (len < 0) {
+          return -1;
+        }
+        if (m_File.AppendString(" 0 obj ") < 0) {
+          return -1;
+        }
+        m_Offset += len + 7;
+        if (m_File.AppendBlock(pBuffer, size) < 0) {
+          return -1;
+        }
+        m_Offset += size;
+        if (m_File.AppendString("\r\nendobj\r\n") < 0) {
+          return -1;
+        }
+        m_Offset += 10;
+      }
+    } else {
+      if (m_File.AppendBlock(pBuffer, size) < 0) {
+        return -1;
+      }
+      m_Offset += size;
+      if (AppendObjectNumberToXRef(objnum) < 0) {
+        return -1;
+      }
+    }
+    FX_Free(pBuffer);
+  }
+  return 1;
+}
+int32_t CPDF_Creator::WriteOldObjs(IFX_Pause* pPause) {
+  uint32_t nLastObjNum = m_pParser->GetLastObjNum();
+  if (!m_pParser->IsValidObjectNumber(nLastObjNum))
+    return 0;
+
+  uint32_t objnum = (uint32_t)(uintptr_t)m_Pos;
+  for (; objnum <= nLastObjNum; ++objnum) {
+    int32_t iRet = WriteOldIndirectObject(objnum);
+    if (iRet < 0)
+      return iRet;
+
+    if (!iRet)
+      continue;
+
+    if (pPause && pPause->NeedToPauseNow()) {
+      m_Pos = (void*)(uintptr_t)(objnum + 1);
+      return 1;
+    }
+  }
+  return 0;
+}
+int32_t CPDF_Creator::WriteNewObjs(FX_BOOL bIncremental, IFX_Pause* pPause) {
+  int32_t iCount = m_NewObjNumArray.GetSize();
+  int32_t index = (int32_t)(uintptr_t)m_Pos;
+  while (index < iCount) {
+    uint32_t objnum = m_NewObjNumArray.ElementAt(index);
+    CPDF_Object* pObj = m_pDocument->GetIndirectObject(objnum);
+    if (!pObj) {
+      ++index;
+      continue;
+    }
+    m_ObjectOffset[objnum] = m_Offset;
+    if (WriteIndirectObj(pObj))
+      return -1;
+
+    index++;
+    if (pPause && pPause->NeedToPauseNow()) {
+      m_Pos = (FX_POSITION)(uintptr_t)index;
+      return 1;
+    }
+  }
+  return 0;
+}
+void CPDF_Creator::InitOldObjNumOffsets() {
+  if (!m_pParser) {
+    return;
+  }
+  uint32_t j = 0;
+  uint32_t dwStart = 0;
+  uint32_t dwEnd = m_pParser->GetLastObjNum();
+  while (dwStart <= dwEnd) {
+    while (dwStart <= dwEnd && m_pParser->IsObjectFreeOrNull(dwStart))
+      dwStart++;
+
+    if (dwStart > dwEnd)
+      break;
+
+    j = dwStart;
+    while (j <= dwEnd && !m_pParser->IsObjectFreeOrNull(j))
+      j++;
+
+    m_ObjectOffset.Add(dwStart, j - dwStart);
+    dwStart = j;
+  }
+}
+
+void CPDF_Creator::InitNewObjNumOffsets() {
+  FX_BOOL bIncremental = (m_dwFlags & FPDFCREATE_INCREMENTAL) != 0;
+  FX_BOOL bNoOriginal = (m_dwFlags & FPDFCREATE_NO_ORIGINAL) != 0;
+  for (const auto& pair : *m_pDocument) {
+    const uint32_t objnum = pair.first;
+    const CPDF_Object* pObj = pair.second.get();
+    if (bIncremental || pObj->GetObjNum() == CPDF_Object::kInvalidObjNum)
+      continue;
+    if (m_pParser && m_pParser->IsValidObjectNumber(objnum) &&
+        m_pParser->GetObjectType(objnum)) {
+      continue;
+    }
+    AppendNewObjNum(objnum);
+  }
+
+  int32_t iCount = m_NewObjNumArray.GetSize();
+  if (iCount == 0)
+    return;
+
+  int32_t i = 0;
+  uint32_t dwStartObjNum = 0;
+  FX_BOOL bCrossRefValid = m_pParser && m_pParser->GetLastXRefOffset() > 0;
+  while (i < iCount) {
+    dwStartObjNum = m_NewObjNumArray.ElementAt(i);
+    if ((bIncremental && (bNoOriginal || bCrossRefValid)) ||
+        !m_ObjectOffset.GetPtrAt(dwStartObjNum)) {
+      break;
+    }
+    i++;
+  }
+  if (i >= iCount)
+    return;
+
+  uint32_t dwLastObjNum = dwStartObjNum;
+  i++;
+  bool bNewStart = false;
+  for (; i < iCount; i++) {
+    uint32_t dwCurObjNum = m_NewObjNumArray.ElementAt(i);
+    bool bExist = m_pParser && m_pParser->IsValidObjectNumber(dwCurObjNum) &&
+                  m_ObjectOffset.GetPtrAt(dwCurObjNum);
+    if (bExist || dwCurObjNum - dwLastObjNum > 1) {
+      if (!bNewStart)
+        m_ObjectOffset.Add(dwStartObjNum, dwLastObjNum - dwStartObjNum + 1);
+      dwStartObjNum = dwCurObjNum;
+    }
+    if (bNewStart)
+      dwStartObjNum = dwCurObjNum;
+
+    bNewStart = bExist;
+    dwLastObjNum = dwCurObjNum;
+  }
+  m_ObjectOffset.Add(dwStartObjNum, dwLastObjNum - dwStartObjNum + 1);
+}
+
+void CPDF_Creator::AppendNewObjNum(uint32_t objbum) {
+  int32_t iStart = 0, iFind = 0;
+  int32_t iEnd = m_NewObjNumArray.GetUpperBound();
+  while (iStart <= iEnd) {
+    int32_t iMid = (iStart + iEnd) / 2;
+    uint32_t dwMid = m_NewObjNumArray.ElementAt(iMid);
+    if (objbum < dwMid) {
+      iEnd = iMid - 1;
+    } else {
+      if (iMid == iEnd) {
+        iFind = iMid + 1;
+        break;
+      }
+      uint32_t dwNext = m_NewObjNumArray.ElementAt(iMid + 1);
+      if (objbum < dwNext) {
+        iFind = iMid + 1;
+        break;
+      }
+      iStart = iMid + 1;
+    }
+  }
+  m_NewObjNumArray.InsertAt(iFind, objbum);
+}
+int32_t CPDF_Creator::WriteDoc_Stage1(IFX_Pause* pPause) {
+  ASSERT(m_iStage > -1 || m_iStage < 20);
+  if (m_iStage == 0) {
+    if (!m_pParser) {
+      m_dwFlags &= ~FPDFCREATE_INCREMENTAL;
+    }
+    if (m_bSecurityChanged && (m_dwFlags & FPDFCREATE_NO_ORIGINAL) == 0) {
+      m_dwFlags &= ~FPDFCREATE_INCREMENTAL;
+    }
+    CPDF_Dictionary* pDict = m_pDocument->GetRoot();
+    m_pMetadata = pDict ? pDict->GetDirectObjectFor("Metadata") : nullptr;
+    if (m_dwFlags & FPDFCREATE_OBJECTSTREAM) {
+      m_pXRefStream.reset(new CPDF_XRefStream);
+      m_pXRefStream->Start();
+      if ((m_dwFlags & FPDFCREATE_INCREMENTAL) != 0 && m_pParser) {
+        FX_FILESIZE prev = m_pParser->GetLastXRefOffset();
+        m_pXRefStream->m_PrevOffset = prev;
+      }
+    }
+    m_iStage = 10;
+  }
+  if (m_iStage == 10) {
+    if ((m_dwFlags & FPDFCREATE_INCREMENTAL) == 0) {
+      if (m_File.AppendString("%PDF-1.") < 0) {
+        return -1;
+      }
+      m_Offset += 7;
+      int32_t version = 7;
+      if (m_FileVersion) {
+        version = m_FileVersion;
+      } else if (m_pParser) {
+        version = m_pParser->GetFileVersion();
+      }
+      int32_t len = m_File.AppendDWord(version % 10);
+      if (len < 0) {
+        return -1;
+      }
+      m_Offset += len;
+      if ((len = m_File.AppendString("\r\n%\xA1\xB3\xC5\xD7\r\n")) < 0) {
+        return -1;
+      }
+      m_Offset += len;
+      InitOldObjNumOffsets();
+      m_iStage = 20;
+    } else {
+      IFX_FileRead* pSrcFile = m_pParser->GetFileAccess();
+      m_Offset = pSrcFile->GetSize();
+      m_Pos = (void*)(uintptr_t)m_Offset;
+      m_iStage = 15;
+    }
+  }
+  if (m_iStage == 15) {
+    if ((m_dwFlags & FPDFCREATE_NO_ORIGINAL) == 0 && m_Pos) {
+      IFX_FileRead* pSrcFile = m_pParser->GetFileAccess();
+      uint8_t buffer[4096];
+      uint32_t src_size = (uint32_t)(uintptr_t)m_Pos;
+      while (src_size) {
+        uint32_t block_size = src_size > 4096 ? 4096 : src_size;
+        if (!pSrcFile->ReadBlock(buffer, m_Offset - src_size, block_size)) {
+          return -1;
+        }
+        if (m_File.AppendBlock(buffer, block_size) < 0) {
+          return -1;
+        }
+        src_size -= block_size;
+        if (pPause && pPause->NeedToPauseNow()) {
+          m_Pos = (void*)(uintptr_t)src_size;
+          return 1;
+        }
+      }
+    }
+    if ((m_dwFlags & FPDFCREATE_NO_ORIGINAL) == 0 &&
+        m_pParser->GetLastXRefOffset() == 0) {
+      InitOldObjNumOffsets();
+      uint32_t dwEnd = m_pParser->GetLastObjNum();
+      bool bObjStm = (m_dwFlags & FPDFCREATE_OBJECTSTREAM) != 0;
+      for (uint32_t objnum = 0; objnum <= dwEnd; objnum++) {
+        if (m_pParser->IsObjectFreeOrNull(objnum))
+          continue;
+
+        m_ObjectOffset[objnum] = m_pParser->GetObjectPositionOrZero(objnum);
+        if (bObjStm) {
+          m_pXRefStream->AddObjectNumberToIndexArray(objnum);
+        }
+      }
+      if (bObjStm) {
+        m_pXRefStream->EndXRefStream(this);
+        m_pXRefStream->Start();
+      }
+    }
+    m_iStage = 20;
+  }
+  InitNewObjNumOffsets();
+  return m_iStage;
+}
+int32_t CPDF_Creator::WriteDoc_Stage2(IFX_Pause* pPause) {
+  ASSERT(m_iStage >= 20 || m_iStage < 30);
+  if (m_iStage == 20) {
+    if ((m_dwFlags & FPDFCREATE_INCREMENTAL) == 0 && m_pParser) {
+      m_Pos = (void*)(uintptr_t)0;
+      m_iStage = 21;
+    } else {
+      m_iStage = 25;
+    }
+  }
+  if (m_iStage == 21) {
+    int32_t iRet = WriteOldObjs(pPause);
+    if (iRet) {
+      return iRet;
+    }
+    m_iStage = 25;
+  }
+  if (m_iStage == 25) {
+    m_Pos = (void*)(uintptr_t)0;
+    m_iStage = 26;
+  }
+  if (m_iStage == 26) {
+    int32_t iRet =
+        WriteNewObjs((m_dwFlags & FPDFCREATE_INCREMENTAL) != 0, pPause);
+    if (iRet) {
+      return iRet;
+    }
+    m_iStage = 27;
+  }
+  if (m_iStage == 27) {
+    if (m_pEncryptDict && !m_pEncryptDict->GetObjNum()) {
+      m_dwLastObjNum += 1;
+      FX_FILESIZE saveOffset = m_Offset;
+      if (WriteIndirectObj(m_dwLastObjNum, m_pEncryptDict) < 0) {
+        return -1;
+      }
+      m_ObjectOffset.Add(m_dwLastObjNum, 1);
+      m_ObjectOffset[m_dwLastObjNum] = saveOffset;
+      m_dwEncryptObjNum = m_dwLastObjNum;
+      if (m_dwFlags & FPDFCREATE_INCREMENTAL) {
+        m_NewObjNumArray.Add(m_dwLastObjNum);
+      }
+    }
+    m_iStage = 80;
+  }
+  return m_iStage;
+}
+int32_t CPDF_Creator::WriteDoc_Stage3(IFX_Pause* pPause) {
+  ASSERT(m_iStage >= 80 || m_iStage < 90);
+  uint32_t dwLastObjNum = m_dwLastObjNum;
+  if (m_iStage == 80) {
+    m_XrefStart = m_Offset;
+    if (m_dwFlags & FPDFCREATE_OBJECTSTREAM) {
+      m_pXRefStream->End(this, TRUE);
+      m_XrefStart = m_pXRefStream->m_PrevOffset;
+      m_iStage = 90;
+    } else if ((m_dwFlags & FPDFCREATE_INCREMENTAL) == 0 ||
+               !m_pParser->IsXRefStream()) {
+      if ((m_dwFlags & FPDFCREATE_INCREMENTAL) == 0 ||
+          m_pParser->GetLastXRefOffset() == 0) {
+        CFX_ByteString str;
+        str = m_ObjectOffset.GetPtrAt(1)
+                  ? "xref\r\n"
+                  : "xref\r\n0 1\r\n0000000000 65535 f\r\n";
+        if (m_File.AppendString(str.AsStringC()) < 0) {
+          return -1;
+        }
+        m_Pos = (void*)(uintptr_t)1;
+        m_iStage = 81;
+      } else {
+        if (m_File.AppendString("xref\r\n") < 0) {
+          return -1;
+        }
+        m_Pos = (void*)(uintptr_t)0;
+        m_iStage = 82;
+      }
+    } else {
+      m_iStage = 90;
+    }
+  }
+  if (m_iStage == 81) {
+    CFX_ByteString str;
+    uint32_t i = (uint32_t)(uintptr_t)m_Pos, j;
+    while (i <= dwLastObjNum) {
+      while (i <= dwLastObjNum && !m_ObjectOffset.GetPtrAt(i)) {
+        i++;
+      }
+      if (i > dwLastObjNum) {
+        break;
+      }
+      j = i;
+      while (j <= dwLastObjNum && m_ObjectOffset.GetPtrAt(j)) {
+        j++;
+      }
+      if (i == 1) {
+        str.Format("0 %d\r\n0000000000 65535 f\r\n", j);
+      } else {
+        str.Format("%d %d\r\n", i, j - i);
+      }
+      if (m_File.AppendBlock(str.c_str(), str.GetLength()) < 0) {
+        return -1;
+      }
+      while (i < j) {
+        str.Format("%010d 00000 n\r\n", m_ObjectOffset[i++]);
+        if (m_File.AppendBlock(str.c_str(), str.GetLength()) < 0) {
+          return -1;
+        }
+      }
+      if (i > dwLastObjNum) {
+        break;
+      }
+      if (pPause && pPause->NeedToPauseNow()) {
+        m_Pos = (void*)(uintptr_t)i;
+        return 1;
+      }
+    }
+    m_iStage = 90;
+  }
+  if (m_iStage == 82) {
+    CFX_ByteString str;
+    int32_t iCount = m_NewObjNumArray.GetSize();
+    int32_t i = (int32_t)(uintptr_t)m_Pos;
+    while (i < iCount) {
+      int32_t j = i;
+      uint32_t objnum = m_NewObjNumArray.ElementAt(i);
+      while (j < iCount) {
+        if (++j == iCount) {
+          break;
+        }
+        uint32_t dwCurrent = m_NewObjNumArray.ElementAt(j);
+        if (dwCurrent - objnum > 1) {
+          break;
+        }
+        objnum = dwCurrent;
+      }
+      objnum = m_NewObjNumArray.ElementAt(i);
+      if (objnum == 1) {
+        str.Format("0 %d\r\n0000000000 65535 f\r\n", j - i + 1);
+      } else {
+        str.Format("%d %d\r\n", objnum, j - i);
+      }
+      if (m_File.AppendBlock(str.c_str(), str.GetLength()) < 0) {
+        return -1;
+      }
+      while (i < j) {
+        objnum = m_NewObjNumArray.ElementAt(i++);
+        str.Format("%010d 00000 n\r\n", m_ObjectOffset[objnum]);
+        if (m_File.AppendBlock(str.c_str(), str.GetLength()) < 0) {
+          return -1;
+        }
+      }
+      if (pPause && (i % 100) == 0 && pPause->NeedToPauseNow()) {
+        m_Pos = (void*)(uintptr_t)i;
+        return 1;
+      }
+    }
+    m_iStage = 90;
+  }
+  return m_iStage;
+}
+
+int32_t CPDF_Creator::WriteDoc_Stage4(IFX_Pause* pPause) {
+  ASSERT(m_iStage >= 90);
+  if ((m_dwFlags & FPDFCREATE_OBJECTSTREAM) == 0) {
+    FX_BOOL bXRefStream =
+        (m_dwFlags & FPDFCREATE_INCREMENTAL) != 0 && m_pParser->IsXRefStream();
+    if (!bXRefStream) {
+      if (m_File.AppendString("trailer\r\n<<") < 0) {
+        return -1;
+      }
+    } else {
+      if (m_File.AppendDWord(m_pDocument->GetLastObjNum() + 1) < 0) {
+        return -1;
+      }
+      if (m_File.AppendString(" 0 obj <<") < 0) {
+        return -1;
+      }
+    }
+    if (m_pParser) {
+      CPDF_Dictionary* p = m_pParser->GetTrailer();
+      for (const auto& it : *p) {
+        const CFX_ByteString& key = it.first;
+        CPDF_Object* pValue = it.second;
+        // TODO(ochang): Consolidate with similar check in
+        // PDF_CreatorWriteTrailer.
+        if (key == "Encrypt" || key == "Size" || key == "Filter" ||
+            key == "Index" || key == "Length" || key == "Prev" || key == "W" ||
+            key == "XRefStm" || key == "ID") {
+          continue;
+        }
+        if (m_File.AppendString(("/")) < 0) {
+          return -1;
+        }
+        if (m_File.AppendString(PDF_NameEncode(key).AsStringC()) < 0) {
+          return -1;
+        }
+        if (pValue->GetObjNum()) {
+          if (m_File.AppendString(" ") < 0) {
+            return -1;
+          }
+          if (m_File.AppendDWord(pValue->GetObjNum()) < 0) {
+            return -1;
+          }
+          if (m_File.AppendString(" 0 R ") < 0) {
+            return -1;
+          }
+        } else {
+          FX_FILESIZE offset = 0;
+          if (PDF_CreatorAppendObject(pValue, &m_File, offset) < 0) {
+            return -1;
+          }
+        }
+      }
+    } else {
+      if (m_File.AppendString("\r\n/Root ") < 0) {
+        return -1;
+      }
+      if (m_File.AppendDWord(m_pDocument->GetRoot()->GetObjNum()) < 0) {
+        return -1;
+      }
+      if (m_File.AppendString(" 0 R\r\n") < 0) {
+        return -1;
+      }
+      if (m_pDocument->GetInfo()) {
+        if (m_File.AppendString("/Info ") < 0) {
+          return -1;
+        }
+        if (m_File.AppendDWord(m_pDocument->GetInfo()->GetObjNum()) < 0) {
+          return -1;
+        }
+        if (m_File.AppendString(" 0 R\r\n") < 0) {
+          return -1;
+        }
+      }
+    }
+    if (m_pEncryptDict) {
+      if (m_File.AppendString("/Encrypt") < 0) {
+        return -1;
+      }
+      uint32_t dwObjNum = m_pEncryptDict->GetObjNum();
+      if (dwObjNum == 0) {
+        dwObjNum = m_pDocument->GetLastObjNum() + 1;
+      }
+      if (m_File.AppendString(" ") < 0) {
+        return -1;
+      }
+      if (m_File.AppendDWord(dwObjNum) < 0) {
+        return -1;
+      }
+      if (m_File.AppendString(" 0 R ") < 0) {
+        return -1;
+      }
+    }
+    if (m_File.AppendString("/Size ") < 0) {
+      return -1;
+    }
+    if (m_File.AppendDWord(m_dwLastObjNum + (bXRefStream ? 2 : 1)) < 0) {
+      return -1;
+    }
+    if ((m_dwFlags & FPDFCREATE_INCREMENTAL) != 0) {
+      FX_FILESIZE prev = m_pParser->GetLastXRefOffset();
+      if (prev) {
+        if (m_File.AppendString("/Prev ") < 0) {
+          return -1;
+        }
+        FX_CHAR offset_buf[20];
+        FXSYS_memset(offset_buf, 0, sizeof(offset_buf));
+        FXSYS_i64toa(prev, offset_buf, 10);
+        if (m_File.AppendBlock(offset_buf, FXSYS_strlen(offset_buf)) < 0) {
+          return -1;
+        }
+      }
+    }
+    if (m_pIDArray) {
+      if (m_File.AppendString(("/ID")) < 0) {
+        return -1;
+      }
+      FX_FILESIZE offset = 0;
+      if (PDF_CreatorAppendObject(m_pIDArray.get(), &m_File, offset) < 0) {
+        return -1;
+      }
+    }
+    if (!bXRefStream) {
+      if (m_File.AppendString(">>") < 0) {
+        return -1;
+      }
+    } else {
+      if (m_File.AppendString("/W[0 4 1]/Index[") < 0) {
+        return -1;
+      }
+      if ((m_dwFlags & FPDFCREATE_INCREMENTAL) != 0 && m_pParser &&
+          m_pParser->GetLastXRefOffset() == 0) {
+        uint32_t i = 0;
+        for (i = 0; i < m_dwLastObjNum; i++) {
+          if (!m_ObjectOffset.GetPtrAt(i)) {
+            continue;
+          }
+          if (m_File.AppendDWord(i) < 0) {
+            return -1;
+          }
+          if (m_File.AppendString(" 1 ") < 0) {
+            return -1;
+          }
+        }
+        if (m_File.AppendString("]/Length ") < 0) {
+          return -1;
+        }
+        if (m_File.AppendDWord(m_dwLastObjNum * 5) < 0) {
+          return -1;
+        }
+        if (m_File.AppendString(">>stream\r\n") < 0) {
+          return -1;
+        }
+        for (i = 0; i < m_dwLastObjNum; i++) {
+          FX_FILESIZE* offset = m_ObjectOffset.GetPtrAt(i);
+          if (!offset) {
+            continue;
+          }
+          OutputIndex(&m_File, *offset);
+        }
+      } else {
+        int count = m_NewObjNumArray.GetSize();
+        int32_t i = 0;
+        for (i = 0; i < count; i++) {
+          uint32_t objnum = m_NewObjNumArray.ElementAt(i);
+          if (m_File.AppendDWord(objnum) < 0) {
+            return -1;
+          }
+          if (m_File.AppendString(" 1 ") < 0) {
+            return -1;
+          }
+        }
+        if (m_File.AppendString("]/Length ") < 0) {
+          return -1;
+        }
+        if (m_File.AppendDWord(count * 5) < 0) {
+          return -1;
+        }
+        if (m_File.AppendString(">>stream\r\n") < 0) {
+          return -1;
+        }
+        for (i = 0; i < count; i++) {
+          uint32_t objnum = m_NewObjNumArray.ElementAt(i);
+          FX_FILESIZE offset = m_ObjectOffset[objnum];
+          OutputIndex(&m_File, offset);
+        }
+      }
+      if (m_File.AppendString("\r\nendstream") < 0) {
+        return -1;
+      }
+    }
+  }
+  if (m_File.AppendString("\r\nstartxref\r\n") < 0) {
+    return -1;
+  }
+  FX_CHAR offset_buf[20];
+  FXSYS_memset(offset_buf, 0, sizeof(offset_buf));
+  FXSYS_i64toa(m_XrefStart, offset_buf, 10);
+  if (m_File.AppendBlock(offset_buf, FXSYS_strlen(offset_buf)) < 0) {
+    return -1;
+  }
+  if (m_File.AppendString("\r\n%%EOF\r\n") < 0) {
+    return -1;
+  }
+  m_File.Flush();
+  return m_iStage = 100;
+}
+
+void CPDF_Creator::Clear() {
+  m_pXRefStream.reset();
+  m_File.Clear();
+  m_NewObjNumArray.RemoveAll();
+  m_pIDArray.reset();
+}
+
+bool CPDF_Creator::Create(IFX_StreamWrite* pFile, uint32_t flags) {
+  m_File.AttachFile(pFile);
+  return Create(flags);
+}
+
+bool CPDF_Creator::Create(uint32_t flags) {
+  m_dwFlags = flags;
+  m_iStage = 0;
+  m_Offset = 0;
+  m_dwLastObjNum = m_pDocument->GetLastObjNum();
+  m_ObjectOffset.Clear();
+  m_NewObjNumArray.RemoveAll();
+  InitID();
+  if (flags & FPDFCREATE_PROGRESSIVE)
+    return true;
+  return Continue(nullptr) > -1;
+}
+
+void CPDF_Creator::InitID(FX_BOOL bDefault) {
+  CPDF_Array* pOldIDArray = m_pParser ? m_pParser->GetIDArray() : nullptr;
+  FX_BOOL bNewId = !m_pIDArray;
+  if (bNewId) {
+    m_pIDArray.reset(new CPDF_Array);
+    CPDF_Object* pID1 = pOldIDArray ? pOldIDArray->GetObjectAt(0) : nullptr;
+    if (pID1) {
+      m_pIDArray->Add(pID1->Clone());
+    } else {
+      std::vector<uint8_t> buffer =
+          PDF_GenerateFileID((uint32_t)(uintptr_t)this, m_dwLastObjNum);
+      CFX_ByteString bsBuffer(buffer.data(), buffer.size());
+      m_pIDArray->Add(new CPDF_String(bsBuffer, TRUE));
+    }
+  }
+  if (!bDefault) {
+    return;
+  }
+  if (pOldIDArray) {
+    CPDF_Object* pID2 = pOldIDArray->GetObjectAt(1);
+    if ((m_dwFlags & FPDFCREATE_INCREMENTAL) && m_pEncryptDict && pID2) {
+      m_pIDArray->Add(pID2->Clone());
+      return;
+    }
+    std::vector<uint8_t> buffer =
+        PDF_GenerateFileID((uint32_t)(uintptr_t)this, m_dwLastObjNum);
+    CFX_ByteString bsBuffer(buffer.data(), buffer.size());
+    m_pIDArray->Add(new CPDF_String(bsBuffer, TRUE));
+    return;
+  }
+  m_pIDArray->Add(m_pIDArray->GetObjectAt(0)->Clone());
+  if (m_pEncryptDict && !pOldIDArray && m_pParser && bNewId) {
+    if (m_pEncryptDict->GetStringFor("Filter") == "Standard") {
+      CFX_ByteString user_pass = m_pParser->GetPassword();
+      uint32_t flag = PDF_ENCRYPT_CONTENT;
+
+      CPDF_SecurityHandler handler;
+      handler.OnCreate(m_pEncryptDict, m_pIDArray.get(), user_pass.raw_str(),
+                       user_pass.GetLength(), flag);
+      if (m_bLocalCryptoHandler)
+        delete m_pCryptoHandler;
+      m_pCryptoHandler = new CPDF_CryptoHandler;
+      m_pCryptoHandler->Init(m_pEncryptDict, &handler);
+      m_bLocalCryptoHandler = TRUE;
+      m_bSecurityChanged = TRUE;
+    }
+  }
+}
+int32_t CPDF_Creator::Continue(IFX_Pause* pPause) {
+  if (m_iStage < 0) {
+    return m_iStage;
+  }
+  int32_t iRet = 0;
+  while (m_iStage < 100) {
+    if (m_iStage < 20) {
+      iRet = WriteDoc_Stage1(pPause);
+    } else if (m_iStage < 30) {
+      iRet = WriteDoc_Stage2(pPause);
+    } else if (m_iStage < 90) {
+      iRet = WriteDoc_Stage3(pPause);
+    } else {
+      iRet = WriteDoc_Stage4(pPause);
+    }
+    if (iRet < m_iStage) {
+      break;
+    }
+  }
+  if (iRet < 1 || m_iStage == 100) {
+    m_iStage = -1;
+    Clear();
+    return iRet > 99 ? 0 : (iRet < 1 ? -1 : iRet);
+  }
+  return m_iStage;
+}
+FX_BOOL CPDF_Creator::SetFileVersion(int32_t fileVersion) {
+  if (fileVersion < 10 || fileVersion > 17) {
+    return FALSE;
+  }
+  m_FileVersion = fileVersion;
+  return TRUE;
+}
+void CPDF_Creator::RemoveSecurity() {
+  ResetStandardSecurity();
+  m_bSecurityChanged = TRUE;
+  m_pEncryptDict = nullptr;
+  m_pCryptoHandler = nullptr;
+}
+void CPDF_Creator::ResetStandardSecurity() {
+  if (!m_bLocalCryptoHandler)
+    return;
+
+  delete m_pCryptoHandler;
+  m_pCryptoHandler = nullptr;
+  m_bLocalCryptoHandler = FALSE;
+}