Add type cast definitions for CPDF_Array.

core/src/fpdfapi/fpdf_render/fpdf_render_loadimage.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 <vector>
 
 #include "../../../../third_party/base/nonstd_unique_ptr.h"
 #include "../../../include/fpdfapi/fpdf_module.h"
@@ skipping 464 matching lines @@
     if (!m_bImageMask) {
       CPDF_Object* pFilter = m_pDict->GetElementValue(FX_BSTRC("Filter"));
       if (pFilter) {
         CFX_ByteString filter;
         if (pFilter->IsName()) {
           filter = pFilter->GetString();
           if (filter == FX_BSTRC("JPXDecode")) {
             m_bDoBpcCheck = FALSE;
             return TRUE;
           }
-        } else if (pFilter->GetType() == PDFOBJ_ARRAY) {
-          CPDF_Array* pArray = (CPDF_Array*)pFilter;
+        } else if (CPDF_Array* pArray = pFilter->AsArray()) {
           if (pArray->GetString(pArray->GetCount() - 1) ==
               FX_BSTRC("JPXDecode")) {
             m_bDoBpcCheck = FALSE;
             return TRUE;
           }
         }
       }
     }
     m_bImageMask = TRUE;
     m_bpc = m_nComponents = 1;
@@ skipping 66 matching lines @@
       }
       pCompData[i].m_DecodeStep =
           (pCompData[i].m_DecodeStep - pCompData[i].m_DecodeMin) / max_data;
     }
   }
   if (!m_pDict->KeyExist(FX_BSTRC("SMask"))) {
     CPDF_Object* pMask = m_pDict->GetElementValue(FX_BSTRC("Mask"));
     if (pMask == NULL) {
       return pCompData;
     }
-    if (pMask->GetType() == PDFOBJ_ARRAY) {
-      CPDF_Array* pArray = (CPDF_Array*)pMask;
+    if (CPDF_Array* pArray = pMask->AsArray()) {
       if (pArray->GetCount() >= m_nComponents * 2) {
         for (FX_DWORD i = 0; i < m_nComponents; i++) {
           int min_num = pArray->GetInteger(i * 2);
           int max_num = pArray->GetInteger(i * 2 + 1);
           pCompData[i].m_ColorKeyMin = FX_MAX(min_num, 0);
           pCompData[i].m_ColorKeyMax = FX_MIN(max_num, max_data);
         }
       }
       bColorKey = TRUE;
     }
@@ skipping 361 matching lines @@
         m_bpc = 1;
         m_nComponents = 1;
       }
       if (filter == FX_BSTRC("RunLengthDecode")) {
         if (m_bpc != 1) {
           m_bpc = 8;
         }
       } else if (filter == FX_BSTRC("DCTDecode")) {
         m_bpc = 8;
       }
-    } else if (pFilter->GetType() == PDFOBJ_ARRAY) {
-      CPDF_Array* pArray = (CPDF_Array*)pFilter;
+    } else if (CPDF_Array* pArray = pFilter->AsArray()) {
       if (pArray->GetString(pArray->GetCount() - 1) ==
               FX_BSTRC("CCITTFaxDecode") ||
           pArray->GetString(pArray->GetCount() - 1) ==
               FX_BSTRC("JBIG2Decode")) {
         m_bpc = 1;
         m_nComponents = 1;
       }
       if (pArray->GetString(pArray->GetCount() - 1) == FX_BSTRC("DCTDecode")) {
         // Previously, pArray->GetString(pArray->GetCount() - 1) ==
         // FX_BSTRC("RunLengthDecode") was checked in the "if" statement as
@@ skipping 687 matching lines @@
 }
 FX_BOOL CPDF_ImageLoader::Continue(void* LoadHandle, IFX_Pause* pPause) {
   return ((CPDF_ProgressiveImageLoaderHandle*)LoadHandle)->Continue(pPause);
 }
 CPDF_ImageLoader::~CPDF_ImageLoader() {
   if (!m_bCached) {
     delete m_pBitmap;
     delete m_pMask;
   }
 }