Add type cast definitions for CPDF_Stream.

core/src/fpdfapi/fpdf_font/fpdf_font.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_pageobj.h"
 #include "../../../include/fpdfapi/fpdf_resource.h"
@@ skipping 101 matching lines @@
 }
 CPDF_Font::~CPDF_Font() {
   delete m_pCharMap;
   m_pCharMap = NULL;
 
   delete m_pToUnicodeMap;
   m_pToUnicodeMap = NULL;
 
   if (m_pFontFile) {
     m_pDocument->GetPageData()->ReleaseFontFileStreamAcc(
-        (CPDF_Stream*)m_pFontFile->GetStream());
+        const_cast<CPDF_Stream*>(m_pFontFile->GetStream()->AsStream()));
   }
 }
 FX_BOOL CPDF_Font::IsVertWriting() const {
   FX_BOOL bVertWriting = FALSE;
   CPDF_CIDFont* pCIDFont = GetCIDFont();
   if (pCIDFont) {
     bVertWriting = pCIDFont->IsVertWriting();
   } else {
     bVertWriting = m_Font.IsVertical();
   }
@@ skipping 135 matching lines @@
     return;
 
   m_pFontFile = m_pDocument->LoadFontFile(pFontFile);
   if (!m_pFontFile)
     return;
 
   const uint8_t* pFontData = m_pFontFile->GetData();
   FX_DWORD dwFontSize = m_pFontFile->GetSize();
   if (!m_Font.LoadEmbedded(pFontData, dwFontSize)) {
     m_pDocument->GetPageData()->ReleaseFontFileStreamAcc(
-        (CPDF_Stream*)m_pFontFile->GetStream());
+        const_cast<CPDF_Stream*>(m_pFontFile->GetStream()->AsStream()));
     m_pFontFile = nullptr;
   }
 }
 
 short TT2PDF(int m, FXFT_Face face) {
   int upm = FXFT_Get_Face_UnitsPerEM(face);
   if (upm == 0) {
     return (short)m;
   }
   return (m * 1000 + upm / 2) / upm;
@@ skipping 1413 matching lines @@
         }
       }
     }
   }
   return TRUE;
 }
 void CPDF_Type3Font::CheckType3FontMetrics() {
   CheckFontMetrics();
 }
 CPDF_Type3Char* CPDF_Type3Font::LoadChar(FX_DWORD charcode, int level) {
-  if (level >= _FPDF_MAX_TYPE3_FORM_LEVEL_) {
-    return NULL;
-  }
-  CPDF_Type3Char* pChar = NULL;
+  if (level >= _FPDF_MAX_TYPE3_FORM_LEVEL_)
+    return nullptr;
+
+  CPDF_Type3Char* pChar = nullptr;
   if (m_CacheMap.Lookup((void*)(uintptr_t)charcode, (void*&)pChar)) {
     if (pChar->m_bPageRequired && m_pPageResources) {
       delete pChar;
       m_CacheMap.RemoveKey((void*)(uintptr_t)charcode);
       return LoadChar(charcode, level + 1);
     }
     return pChar;
   }
   const FX_CHAR* name =
       GetAdobeCharName(m_BaseEncoding, m_pCharNames, charcode);
-  if (name == NULL) {
-    return NULL;
-  }
+  if (!name)
+    return nullptr;
+
   CPDF_Stream* pStream =
-      (CPDF_Stream*)(m_pCharProcs ? m_pCharProcs->GetElementValue(name) : NULL);
-  if (pStream == NULL || pStream->GetType() != PDFOBJ_STREAM) {
-    return NULL;
-  }
+      ToStream(m_pCharProcs ? m_pCharProcs->GetElementValue(name) : nullptr);
+  if (!pStream)
+    return nullptr;
+
   pChar = new CPDF_Type3Char;
   pChar->m_pForm = new CPDF_Form(
       m_pDocument, m_pFontResources ? m_pFontResources : m_pPageResources,
-      pStream, NULL);
-  pChar->m_pForm->ParseContent(NULL, NULL, pChar, NULL, level + 1);
+      pStream, nullptr);
+  pChar->m_pForm->ParseContent(nullptr, nullptr, pChar, nullptr, level + 1);
   FX_FLOAT scale = m_FontMatrix.GetXUnit();
   pChar->m_Width = (int32_t)(pChar->m_Width * scale + 0.5f);
   FX_RECT& rcBBox = pChar->m_BBox;
   CFX_FloatRect char_rect(
       (FX_FLOAT)rcBBox.left / 1000.0f, (FX_FLOAT)rcBBox.bottom / 1000.0f,
       (FX_FLOAT)rcBBox.right / 1000.0f, (FX_FLOAT)rcBBox.top / 1000.0f);
   if (rcBBox.right <= rcBBox.left || rcBBox.bottom >= rcBBox.top) {
     char_rect = pChar->m_pForm->CalcBoundingBox();
   }
   char_rect.Transform(&m_FontMatrix);
   rcBBox.left = FXSYS_round(char_rect.left * 1000);
   rcBBox.right = FXSYS_round(char_rect.right * 1000);
   rcBBox.top = FXSYS_round(char_rect.top * 1000);
   rcBBox.bottom = FXSYS_round(char_rect.bottom * 1000);
   m_CacheMap.SetAt((void*)(uintptr_t)charcode, pChar);
   if (pChar->m_pForm->CountObjects() == 0) {
     delete pChar->m_pForm;
-    pChar->m_pForm = NULL;
+    pChar->m_pForm = nullptr;
   }
   return pChar;
 }
 int CPDF_Type3Font::GetCharWidthF(FX_DWORD charcode, int level) {
   if (charcode > 0xff) {
     charcode = 0;
   }
   if (m_CharWidthL[charcode]) {
     return m_CharWidthL[charcode];
   }
@@ skipping 14 matching lines @@
 CPDF_Type3Char::CPDF_Type3Char() {
   m_pForm = NULL;
   m_pBitmap = NULL;
   m_bPageRequired = FALSE;
   m_bColored = FALSE;
 }
 CPDF_Type3Char::~CPDF_Type3Char() {
   delete m_pForm;
   delete m_pBitmap;
 }