Merge to XFA: Add type cast definitions for CPDF_Stream.

core/src/fpdfapi/fpdf_font/fpdf_font_cid.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 "../../../include/fpdfapi/fpdf_module.h"
 #include "../../../include/fpdfapi/fpdf_page.h"
 #include "../../../include/fpdfapi/fpdf_resource.h"
 #include "../../../include/fxge/fx_freetype.h"
@@ skipping 1197 matching lines @@
   CFX_ByteString subtype = pCIDFontDict->GetString(FX_BSTRC("Subtype"));
   m_bType1 = (subtype == FX_BSTRC("CIDFontType0"));
 
   if (pEncoding->IsName()) {
     CFX_ByteString cmap = pEncoding->GetString();
     m_pCMap =
         CPDF_ModuleMgr::Get()
             ->GetPageModule()
             ->GetFontGlobals()
             ->m_CMapManager.GetPredefinedCMap(cmap, m_pFontFile && m_bType1);
-  } else if (pEncoding->GetType() == PDFOBJ_STREAM) {
+  } else if (CPDF_Stream* pStream = pEncoding->AsStream()) {
     m_pAllocatedCMap = m_pCMap = new CPDF_CMap;
-    CPDF_Stream* pStream = (CPDF_Stream*)pEncoding;
     CPDF_StreamAcc acc;
     acc.LoadAllData(pStream, FALSE);
     m_pCMap->LoadEmbedded(acc.GetData(), acc.GetSize());
   } else {
     return FALSE;
   }
   if (m_pCMap == NULL) {
     return FALSE;
   }
   m_Charset = m_pCMap->m_Charset;
@@ skipping 27 matching lines @@
     LoadMetricsArray(pWidthArray, m_WidthList, 1);
   }
   if (!IsEmbedded()) {
     LoadSubstFont();
   }
   if (1) {
     if (m_pFontFile || (GetSubstFont()->m_SubstFlags & FXFONT_SUBST_EXACT)) {
       CPDF_Object* pmap =
           pCIDFontDict->GetElementValue(FX_BSTRC("CIDToGIDMap"));
       if (pmap) {
-        if (pmap->GetType() == PDFOBJ_STREAM) {
+        if (CPDF_Stream* pStream = pmap->AsStream()) {
           m_pCIDToGIDMap = new CPDF_StreamAcc;
-          m_pCIDToGIDMap->LoadAllData((CPDF_Stream*)pmap, FALSE);
+          m_pCIDToGIDMap->LoadAllData(pStream, FALSE);
         } else if (pmap->GetString() == FX_BSTRC("Identity")) {
 #if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_
           if (m_pFontFile) {
             m_bCIDIsGID = TRUE;
           }
 #else
           m_bCIDIsGID = TRUE;
 #endif
         }
       }
@@ skipping 464 matching lines @@
 
 const uint8_t* CPDF_CIDFont::GetCIDTransform(FX_WORD CID) const {
   if (m_Charset != CIDSET_JAPAN1 || m_pFontFile)
     return nullptr;
 
   const struct CIDTransform* found = (const struct CIDTransform*)FXSYS_bsearch(
       &CID, g_Japan1_VertCIDs, FX_ArraySize(g_Japan1_VertCIDs),
       sizeof(g_Japan1_VertCIDs[0]), CompareCIDTransform);
   return found ? &found->a : nullptr;
 }