Add type cast definitions for CPDF_Array.

core/src/fpdfapi/fpdf_page/fpdf_page_graph_state.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_pageobj.h"
 #include "../../../include/fpdfapi/fpdf_module.h"
 #include "../../../include/fpdfapi/fpdf_render.h"
@@ skipping 443 matching lines @@
     pData->m_DashArray[i] = FXSYS_Mul(pArray->GetNumber(i), scale);
   }
 }
 void CPDF_AllStates::ProcessExtGS(CPDF_Dictionary* pGS,
                                   CPDF_StreamContentParser* pParser) {
   CPDF_GeneralStateData* pGeneralState = m_GeneralState.GetModify();
   FX_POSITION pos = pGS->GetStartPos();
   while (pos) {
     CFX_ByteString key_str;
     CPDF_Object* pElement = pGS->GetNextElement(pos, key_str);
-    CPDF_Object* pObject = pElement ? pElement->GetDirect() : NULL;
-    if (pObject == NULL) {
+    CPDF_Object* pObject = pElement ? pElement->GetDirect() : nullptr;
+    if (!pObject)
       continue;
-    }
+
     FX_DWORD key = key_str.GetID();
     switch (key) {
       case FXBSTR_ID('L', 'W', 0, 0):
         m_GraphState.GetModify()->m_LineWidth = pObject->GetNumber();
         break;
       case FXBSTR_ID('L', 'C', 0, 0):
         m_GraphState.GetModify()->m_LineCap =
             (CFX_GraphStateData::LineCap)pObject->GetInteger();
         break;
       case FXBSTR_ID('L', 'J', 0, 0):
         m_GraphState.GetModify()->m_LineJoin =
             (CFX_GraphStateData::LineJoin)pObject->GetInteger();
         break;
       case FXBSTR_ID('M', 'L', 0, 0):
         m_GraphState.GetModify()->m_MiterLimit = pObject->GetNumber();
         break;
       case FXBSTR_ID('D', 0, 0, 0): {
-        if (pObject->GetType() != PDFOBJ_ARRAY) {
+        CPDF_Array* pDash = pObject->AsArray();
+        if (!pDash)
           break;
-        }
-        CPDF_Array* pDash = (CPDF_Array*)pObject;
+
         CPDF_Array* pArray = pDash->GetArray(0);
-        if (pArray == NULL) {
+        if (!pArray)
           break;
-        }
+
         SetLineDash(pArray, pDash->GetNumber(1), 1.0f);
         break;
       }
       case FXBSTR_ID('R', 'I', 0, 0):
         m_GeneralState.SetRenderIntent(pObject->GetString());
         break;
       case FXBSTR_ID('F', 'o', 'n', 't'): {
-        if (pObject->GetType() != PDFOBJ_ARRAY) {
+        CPDF_Array* pFont = pObject->AsArray();
+        if (!pFont)
           break;
-        }
-        CPDF_Array* pFont = (CPDF_Array*)pObject;
+
         m_TextState.GetModify()->m_FontSize = pFont->GetNumber(1);
         m_TextState.SetFont(pParser->FindFont(pFont->GetString(0)));
         break;
       }
       case FXBSTR_ID('T', 'R', 0, 0):
         if (pGS->KeyExist(FX_BSTRC("TR2"))) {
           continue;
         }
       case FXBSTR_ID('T', 'R', '2', 0):
         pGeneralState->m_pTR =
             (pObject && !pObject->IsName()) ? pObject : nullptr;
         break;
       case FXBSTR_ID('B', 'M', 0, 0): {
-        CFX_ByteString mode;
-        if (pObject->GetType() == PDFOBJ_ARRAY) {
-          mode = ((CPDF_Array*)pObject)->GetString(0);
-        } else {
-          mode = pObject->GetString();
-        }
+        CPDF_Array* pArray = pObject->AsArray();
+        CFX_ByteString mode =
+            pArray ? pArray->GetString(0) : pObject->GetString();
+
         pGeneralState->SetBlendMode(mode);
         if (pGeneralState->m_BlendType > FXDIB_BLEND_MULTIPLY) {
           pParser->GetObjectList()->m_bBackgroundAlphaNeeded = TRUE;
         }
         break;
       }
       case FXBSTR_ID('S', 'M', 'a', 's'):
         if (ToDictionary(pObject)) {
           pGeneralState->m_pSoftMask = pObject;
           FXSYS_memcpy(pGeneralState->m_SMaskMatrix,
@@ skipping 143 matching lines @@
       pDict = NULL;
       if (item.GetParamType() == CPDF_ContentMarkItem::PropertiesDict ||
           item.GetParamType() == CPDF_ContentMarkItem::DirectDict) {
         pDict = ToDictionary(static_cast<CPDF_Object*>(item.GetParam()));
       }
       return TRUE;
     }
   }
   return FALSE;
 }