Add type cast definitions for CPDF_Array.

core/src/fpdfapi/fpdf_page/fpdf_page_colors.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_page.h"
 #include "../../../include/fpdfapi/fpdf_module.h"
 #include "../../../include/fxcodec/fx_codec.h"
 #include "pageint.h"
@@ skipping 1121 matching lines @@
 }
 void CPDF_DeviceNCS::GetDefaultValue(int iComponent,
                                      FX_FLOAT& value,
                                      FX_FLOAT& min,
                                      FX_FLOAT& max) const {
   value = 1.0f;
   min = 0;
   max = 1.0f;
 }
 FX_BOOL CPDF_DeviceNCS::v_Load(CPDF_Document* pDoc, CPDF_Array* pArray) {
-  CPDF_Object* pObj = pArray->GetElementValue(1);
-  if (!pObj) {
+  CPDF_Array* pObj = ToArray(pArray->GetElementValue(1));
+  if (!pObj)
     return FALSE;
-  }
-  if (pObj->GetType() != PDFOBJ_ARRAY) {
-    return FALSE;
-  }
-  m_nComponents = ((CPDF_Array*)pObj)->GetCount();
+
+  m_nComponents = pObj->GetCount();
   CPDF_Object* pAltCS = pArray->GetElementValue(2);
   if (!pAltCS || pAltCS == m_pArray) {
     return FALSE;
   }
   m_pAltCS = Load(pDoc, pAltCS);
   m_pFunc = CPDF_Function::Load(pArray->GetElementValue(3));
   if (m_pAltCS == NULL || m_pFunc == NULL) {
     return FALSE;
   }
   if (m_pFunc->CountOutputs() < m_pAltCS->CountComponents()) {
@@ skipping 57 matching lines @@
     while (pos) {
       CFX_ByteString bsKey;
       CPDF_Object* pValue = pDict->GetNextElement(pos, bsKey);
       if (ToName(pValue))
         pRet = _CSFromName(pValue->GetString());
       if (pRet)
         return pRet;
     }
     return nullptr;
   }
-  if (pObj->GetType() != PDFOBJ_ARRAY) {
-    return NULL;
-  }
-  CPDF_Array* pArray = (CPDF_Array*)pObj;
-  if (pArray->GetCount() == 0) {
-    return NULL;
-  }
+
+  CPDF_Array* pArray = pObj->AsArray();
+  if (!pArray || pArray->GetCount() == 0)
+    return nullptr;
+
   CPDF_Object* pFamilyObj = pArray->GetElementValue(0);
-  if (!pFamilyObj) {
-    return NULL;
-  }
+  if (!pFamilyObj)
+    return nullptr;
+
   CFX_ByteString familyname = pFamilyObj->GetString();
-  if (pArray->GetCount() == 1) {
+  if (pArray->GetCount() == 1)
     return _CSFromName(familyname);
-  }
+
   CPDF_ColorSpace* pCS = NULL;
   FX_DWORD id = familyname.GetID();
   if (id == FXBSTR_ID('C', 'a', 'l', 'G')) {
     pCS = new CPDF_CalGray(pDoc);
   } else if (id == FXBSTR_ID('C', 'a', 'l', 'R')) {
     pCS = new CPDF_CalRGB(pDoc);
   } else if (id == FXBSTR_ID('L', 'a', 'b', 0)) {
     pCS = new CPDF_LabCS(pDoc);
   } else if (id == FXBSTR_ID('I', 'C', 'C', 'B')) {
     pCS = new CPDF_ICCBasedCS(pDoc);
@@ skipping 278 matching lines @@
   }
   PatternValue* pvalue = (PatternValue*)m_pBuffer;
   return pvalue->m_nComps ? pvalue->m_Comps : NULL;
 }
 FX_BOOL CPDF_Color::IsEqual(const CPDF_Color& other) const {
   if (m_pCS != other.m_pCS || m_pCS == NULL) {
     return FALSE;
   }
   return FXSYS_memcmp(m_pBuffer, other.m_pBuffer, m_pCS->GetBufSize()) == 0;
 }