Add CPDF_ImageObject::GetImage().

core/fpdfapi/fpdf_edit/cpdf_pagecontentgenerator.cpp

 // 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/fpdf_edit/include/cpdf_pagecontentgenerator.h"
 
 #include "core/fpdfapi/fpdf_edit/include/cpdf_creator.h"
 #include "core/fpdfapi/fpdf_page/include/cpdf_image.h"
@@ skipping 40 matching lines @@
   CPDF_Object* pContent =
       pPageDict ? pPageDict->GetDirectObjectBy("Contents") : nullptr;
   if (pContent) {
     pPageDict->RemoveAt("Contents");
   }
   CPDF_Stream* pStream = new CPDF_Stream(nullptr, 0, nullptr);
   pStream->SetData(buf.GetBuffer(), buf.GetLength(), FALSE, FALSE);
   m_pDocument->AddIndirectObject(pStream);
   pPageDict->SetAtReference("Contents", m_pDocument, pStream->GetObjNum());
 }
+
 CFX_ByteString CPDF_PageContentGenerator::RealizeResource(
     CPDF_Object* pResourceObj,
     const CFX_ByteString& bsType) {
   if (!m_pPage->m_pResources) {
     m_pPage->m_pResources = new CPDF_Dictionary;
     int objnum = m_pDocument->AddIndirectObject(m_pPage->m_pResources);
     m_pPage->m_pFormDict->SetAtReference("Resources", m_pDocument, objnum);
   }
   CPDF_Dictionary* pResList = m_pPage->m_pResources->GetDictBy(bsType);
   if (!pResList) {
     pResList = new CPDF_Dictionary;
     m_pPage->m_pResources->SetAt(bsType, pResList);
   }
   m_pDocument->AddIndirectObject(pResourceObj);
   CFX_ByteString name;
   int idnum = 1;
   while (1) {
     name.Format("FX%c%d", bsType[0], idnum);
     if (!pResList->KeyExist(name)) {
       break;
     }
     idnum++;
   }
   pResList->SetAtReference(name, m_pDocument, pResourceObj->GetObjNum());
   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 ";
-  if (!pImageObj->m_pImage->IsInline()) {
-    CPDF_Stream* pStream = pImageObj->m_pImage->GetStream();
+  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) {
-      if (pImageObj->m_pImage)
-        pImageObj->m_pImage->Release();
+      pImage->Release();
       pImageObj->m_pImage = 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) {
@@ skipping 50 matching lines @@
     CPDF_StreamAcc contentStream;
     contentStream.LoadAllData(pStream);
     ProcessForm(buf, contentStream.GetData(), contentStream.GetSize(), matrix);
   }
   CPDF_Stream* pStream = new CPDF_Stream(nullptr, 0, nullptr);
   pStream->SetData(buf.GetBuffer(), buf.GetLength(), FALSE, FALSE);
   m_pDocument->AddIndirectObject(pStream);
   m_pPage->m_pFormDict->SetAtReference("Contents", m_pDocument,
                                        pStream->GetObjNum());
 }