Fix abort above FPDFPage_Flatten

fpdfsdk/fpdf_flatten.cpp

 // 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 "public/fpdf_flatten.h"
 
 #include <algorithm>
 
@@ skipping 379 matching lines @@
               continue;
             pAPStream = pFirstObj->AsStream();
           }
         }
       }
     }
     if (!pAPStream)
       continue;
 
     CPDF_Dictionary* pAPDic = pAPStream->GetDict();
-    CFX_Matrix matrix = pAPDic->GetMatrixFor("Matrix");
-
     CFX_FloatRect rcStream;
     if (pAPDic->KeyExist("Rect"))
       rcStream = pAPDic->GetRectFor("Rect");
     else if (pAPDic->KeyExist("BBox"))
       rcStream = pAPDic->GetRectFor("BBox");
 
     if (rcStream.IsEmpty())
       continue;
 
     CPDF_Object* pObj = pAPStream;
+    if (pObj->IsInline()) {
+      pObj = pObj->Clone();
+      pDocument->AddIndirectObject(pObj);
+    }
 
-    if (pObj) {
-      CPDF_Dictionary* pObjDic = pObj->GetDict();
-      if (pObjDic) {
-        pObjDic->SetNameFor("Type", "XObject");
-        pObjDic->SetNameFor("Subtype", "Form");
-      }
+    CPDF_Dictionary* pObjDic = pObj->GetDict();
+    if (pObjDic) {
+      pObjDic->SetNameFor("Type", "XObject");
+      pObjDic->SetNameFor("Subtype", "Form");
     }
 
     CPDF_Dictionary* pXObject = pNewXORes->GetDictFor("XObject");
     if (!pXObject) {
       pXObject = new CPDF_Dictionary(pDocument->GetByteStringPool());
       pNewXORes->SetFor("XObject", pXObject);
     }
 
     CFX_ByteString sFormName;
     sFormName.Format("F%d", i);
-    pXObject->SetReferenceFor(sFormName, pDocument,
-                              pDocument->AddIndirectObject(pObj));
+    pXObject->SetReferenceFor(sFormName, pDocument, pObj->GetObjNum());
 
     CPDF_StreamAcc acc;
     acc.LoadAllData(pNewXObject);
 
     const uint8_t* pData = acc.GetData();
     CFX_ByteString sStream(pData, acc.GetSize());
-
+    CFX_Matrix matrix = pAPDic->GetMatrixFor("Matrix");
     if (matrix.IsIdentity()) {
       matrix.a = 1.0f;
       matrix.b = 0.0f;
       matrix.c = 0.0f;
       matrix.d = 1.0f;
       matrix.e = 0.0f;
       matrix.f = 0.0f;
     }
 
     CFX_ByteString sTemp;
     CFX_Matrix m = GetMatrix(rcAnnot, rcStream, matrix);
     sTemp.Format("q %f 0 0 %f %f %f cm /%s Do Q\n", m.a, m.d, m.e, m.f,
                  sFormName.c_str());
     sStream += sTemp;
     pNewXObject->SetData(sStream.raw_str(), sStream.GetLength());
   }
   pPageDict->RemoveFor("Annots");
 
   RectArray.RemoveAll();
   return FLATTEN_SUCCESS;
 }