Fix chromium-style errors.

R=tsepez@chromium.org

Review URL: https://codereview.chromium.org/1772543003 .

15 files changed, 247 insertions, 124 deletions

diff --git a/core/include/fpdfapi/fpdf_parser.h b/core/include/fpdfapi/fpdf_parser.h
index 5903e82a16..53404b7586 100644
--- a/core/include/fpdfapi/fpdf_parser.h
+++ b/core/include/fpdfapi/fpdf_parser.h
@@ -476,16 +476,12 @@ class IPDF_SecurityHandler {
                          CPDF_Dictionary* pEncryptDict) = 0;
 
   virtual FX_DWORD GetPermissions() = 0;
-
   virtual FX_BOOL GetCryptInfo(int& cipher,
                                const uint8_t*& buffer,
                                int& keylen) = 0;
 
   virtual FX_BOOL IsMetadataEncrypted() = 0;
-
   virtual CPDF_CryptoHandler* CreateCryptoHandler() = 0;
-
-  virtual CPDF_StandardSecurityHandler* GetStandardHandler() { return NULL; }
 };
 
 #define PDF_ENCRYPT_CONTENT 0
@@ -797,19 +793,22 @@ class IPDF_DataAvail {
 };
 
 enum PDF_PAGENODE_TYPE {
-  PDF_PAGENODE_UNKOWN = 0,
+  PDF_PAGENODE_UNKNOWN = 0,
   PDF_PAGENODE_PAGE,
   PDF_PAGENODE_PAGES,
   PDF_PAGENODE_ARRAY,
 };
+
 class CPDF_PageNode {
  public:
-  CPDF_PageNode() : m_type(PDF_PAGENODE_UNKOWN) {}
+  CPDF_PageNode();
   ~CPDF_PageNode();
+
   PDF_PAGENODE_TYPE m_type;
   FX_DWORD m_dwPageNo;
   CFX_ArrayTemplate<CPDF_PageNode*> m_childNode;
 };
+
 enum PDF_DATAAVAIL_STATUS {
   PDF_DATAAVAIL_HEADER = 0,
   PDF_DATAAVAIL_FIRSTPAGE,
diff --git a/core/include/fpdfapi/fpdf_resource.h b/core/include/fpdfapi/fpdf_resource.h
index 450e878fa1..6bae2ac469 100644
--- a/core/include/fpdfapi/fpdf_resource.h
+++ b/core/include/fpdfapi/fpdf_resource.h
@@ -102,39 +102,37 @@ class CPDF_Font {
 
   virtual ~CPDF_Font();
 
-  virtual bool IsType1Font() const { return false; }
-  virtual bool IsTrueTypeFont() const { return false; }
-  virtual bool IsType3Font() const { return false; }
-  virtual bool IsCIDFont() const { return false; }
-  virtual const CPDF_Type1Font* AsType1Font() const { return nullptr; }
-  virtual CPDF_Type1Font* AsType1Font() { return nullptr; }
-  virtual const CPDF_TrueTypeFont* AsTrueTypeFont() const { return nullptr; }
-  virtual CPDF_TrueTypeFont* AsTrueTypeFont() { return nullptr; }
-  virtual const CPDF_Type3Font* AsType3Font() const { return nullptr; }
-  virtual CPDF_Type3Font* AsType3Font() { return nullptr; }
-  virtual const CPDF_CIDFont* AsCIDFont() const { return nullptr; }
-  virtual CPDF_CIDFont* AsCIDFont() { return nullptr; }
+  virtual bool IsType1Font() const;
+  virtual bool IsTrueTypeFont() const;
+  virtual bool IsType3Font() const;
+  virtual bool IsCIDFont() const;
+  virtual const CPDF_Type1Font* AsType1Font() const;
+  virtual CPDF_Type1Font* AsType1Font();
+  virtual const CPDF_TrueTypeFont* AsTrueTypeFont() const;
+  virtual CPDF_TrueTypeFont* AsTrueTypeFont();
+  virtual const CPDF_Type3Font* AsType3Font() const;
+  virtual CPDF_Type3Font* AsType3Font();
+  virtual const CPDF_CIDFont* AsCIDFont() const;
+  virtual CPDF_CIDFont* AsCIDFont();
 
   virtual FX_BOOL IsVertWriting() const;
-  virtual FX_BOOL IsUnicodeCompatible() const { return FALSE; }
+  virtual FX_BOOL IsUnicodeCompatible() const;
   virtual FX_DWORD GetNextChar(const FX_CHAR* pString,
                                int nStrLen,
                                int& offset) const;
-  virtual int CountChar(const FX_CHAR* pString, int size) const { return size; }
+  virtual int CountChar(const FX_CHAR* pString, int size) const;
   virtual int AppendChar(FX_CHAR* buf, FX_DWORD charcode) const;
-  virtual int GetCharSize(FX_DWORD charcode) const { return 1; }
+  virtual int GetCharSize(FX_DWORD charcode) const;
   virtual int GlyphFromCharCode(FX_DWORD charcode,
-                                FX_BOOL* pVertGlyph = NULL) = 0;
-  virtual int GlyphFromCharCodeExt(FX_DWORD charcode) {
-    return GlyphFromCharCode(charcode);
-  }
+                                FX_BOOL* pVertGlyph = nullptr);
+  virtual int GlyphFromCharCodeExt(FX_DWORD charcode);
   virtual CFX_WideString UnicodeFromCharCode(FX_DWORD charcode) const;
   virtual FX_DWORD CharCodeFromUnicode(FX_WCHAR Unicode) const;
 
   const CFX_ByteString& GetBaseFont() const { return m_BaseFont; }
   const CFX_SubstFont* GetSubstFont() const { return m_Font.GetSubstFont(); }
   FX_DWORD GetFlags() const { return m_Flags; }
-  FX_BOOL IsEmbedded() const { return IsType3Font() || m_pFontFile != NULL; }
+  FX_BOOL IsEmbedded() const { return IsType3Font() || m_pFontFile != nullptr; }
   CPDF_StreamAcc* GetFontFile() const { return m_pFontFile; }
   CPDF_Dictionary* GetFontDict() const { return m_pFontDict; }
   FX_BOOL IsStandardFont() const;
@@ -257,9 +255,9 @@ class CPDF_Type1Font : public CPDF_SimpleFont {
   CPDF_Type1Font();
 
   // CPDF_Font:
-  bool IsType1Font() const override { return true; }
-  const CPDF_Type1Font* AsType1Font() const override { return this; }
-  CPDF_Type1Font* AsType1Font() override { return this; }
+  bool IsType1Font() const override;
+  const CPDF_Type1Font* AsType1Font() const override;
+  CPDF_Type1Font* AsType1Font() override;
   int GlyphFromCharCodeExt(FX_DWORD charcode) override;
 
   int GetBase14Font() const { return m_Base14Font; }
@@ -279,9 +277,9 @@ class CPDF_TrueTypeFont : public CPDF_SimpleFont {
   CPDF_TrueTypeFont();
 
   // CPDF_Font:
-  bool IsTrueTypeFont() const override { return true; }
-  const CPDF_TrueTypeFont* AsTrueTypeFont() const override { return this; }
-  CPDF_TrueTypeFont* AsTrueTypeFont() override { return this; }
+  bool IsTrueTypeFont() const override;
+  const CPDF_TrueTypeFont* AsTrueTypeFont() const override;
+  CPDF_TrueTypeFont* AsTrueTypeFont() override;
 
  protected:
   // CPDF_Font:
@@ -313,9 +311,9 @@ class CPDF_Type3Font : public CPDF_SimpleFont {
   ~CPDF_Type3Font() override;
 
   // CPDF_Font:
-  bool IsType3Font() const override { return true; }
-  const CPDF_Type3Font* AsType3Font() const override { return this; }
-  CPDF_Type3Font* AsType3Font() override { return this; }
+  bool IsType3Font() const override;
+  const CPDF_Type3Font* AsType3Font() const override;
+  CPDF_Type3Font* AsType3Font() override;
   int GetCharWidthF(FX_DWORD charcode, int level = 0) override;
   FX_RECT GetCharBBox(FX_DWORD charcode, int level = 0) override;
 
@@ -362,9 +360,9 @@ class CPDF_CIDFont : public CPDF_Font {
   static FX_FLOAT CIDTransformToFloat(uint8_t ch);
 
   // CPDF_Font:
-  bool IsCIDFont() const override { return true; }
-  const CPDF_CIDFont* AsCIDFont() const override { return this; }
-  CPDF_CIDFont* AsCIDFont() override { return this; }
+  bool IsCIDFont() const override;
+  const CPDF_CIDFont* AsCIDFont() const override;
+  CPDF_CIDFont* AsCIDFont() override;
   int GlyphFromCharCode(FX_DWORD charcode, FX_BOOL* pVertGlyph = NULL) override;
   int GetCharWidthF(FX_DWORD charcode, int level = 0) override;
   FX_RECT GetCharBBox(FX_DWORD charcode, int level = 0) override;
@@ -434,15 +432,10 @@ class CPDF_ColorSpace {
   void ReleaseCS();
 
   int GetBufSize() const;
-
   FX_FLOAT* CreateBuf();
-
   void GetDefaultColor(FX_FLOAT* buf) const;
-
   int CountComponents() const { return m_nComponents; }
-
   int GetFamily() const { return m_Family; }
-
   virtual void GetDefaultValue(int iComponent,
                                FX_FLOAT& value,
                                FX_FLOAT& min,
@@ -453,12 +446,10 @@ class CPDF_ColorSpace {
   }
 
   FX_BOOL sRGB() const;
-
   virtual FX_BOOL GetRGB(FX_FLOAT* pBuf,
                          FX_FLOAT& R,
                          FX_FLOAT& G,
                          FX_FLOAT& B) const = 0;
-
   virtual FX_BOOL SetRGB(FX_FLOAT* pBuf,
                          FX_FLOAT R,
                          FX_FLOAT G,
@@ -471,7 +462,6 @@ class CPDF_ColorSpace {
                   FX_FLOAT& m,
                   FX_FLOAT& y,
                   FX_FLOAT& k) const;
-
   FX_BOOL SetCMYK(FX_FLOAT* pBuf,
                   FX_FLOAT c,
                   FX_FLOAT m,
@@ -486,9 +476,7 @@ class CPDF_ColorSpace {
                                   FX_BOOL bTransMask = FALSE) const;
 
   CPDF_Array*& GetArray() { return m_pArray; }
-
   int GetMaxIndex() const;
-
   virtual CPDF_ColorSpace* GetBaseCS() const { return NULL; }
 
   virtual void EnableStdConversion(FX_BOOL bEnabled);
diff --git a/core/include/fxcrt/fx_basic.h b/core/include/fxcrt/fx_basic.h
index 006b2b377d..11c573be6e 100644
--- a/core/include/fxcrt/fx_basic.h
+++ b/core/include/fxcrt/fx_basic.h
@@ -45,6 +45,7 @@ class CFX_BinaryBuf {
  public:
   CFX_BinaryBuf();
   explicit CFX_BinaryBuf(FX_STRSIZE size);
+  ~CFX_BinaryBuf();
 
   uint8_t* GetBuffer() const { return m_pBuffer.get(); }
   FX_STRSIZE GetSize() const { return m_DataSize; }
@@ -182,6 +183,7 @@ class CFX_ArchiveLoader {
 class CFX_FileBufferArchive {
  public:
   CFX_FileBufferArchive();
+  ~CFX_FileBufferArchive();
 
   void Clear();
   bool Flush();
@@ -694,13 +696,12 @@ class CFX_MapPtrTemplate : public CFX_MapPtrToPtr {
   }
 };
 #endif  // PDF_ENABLE_XFA
+
 class CFX_PtrList {
  protected:
   struct CNode {
     CNode* pNext;
-
     CNode* pPrev;
-
     void* data;
   };
 
@@ -708,7 +709,6 @@ class CFX_PtrList {
   CFX_PtrList(int nBlockSize = 10);
 
   FX_POSITION GetHeadPosition() const { return (FX_POSITION)m_pNodeHead; }
-
   FX_POSITION GetTailPosition() const { return (FX_POSITION)m_pNodeTail; }
 
   void* GetNext(FX_POSITION& rPosition) const {
@@ -737,60 +737,49 @@ class CFX_PtrList {
   }
 
   int GetCount() const { return m_nCount; }
-
   FX_POSITION AddTail(void* newElement);
-
   FX_POSITION AddHead(void* newElement);
 
   void SetAt(FX_POSITION pos, void* newElement) {
     CNode* pNode = (CNode*)pos;
     pNode->data = newElement;
   }
-
   FX_POSITION InsertAfter(FX_POSITION pos, void* newElement);
 
   FX_POSITION Find(void* searchValue, FX_POSITION startAfter = NULL) const;
-
   FX_POSITION FindIndex(int index) const;
 
   void RemoveAt(FX_POSITION pos);
-
   void RemoveAll();
 
  protected:
   CNode* m_pNodeHead;
-
   CNode* m_pNodeTail;
-
   int m_nCount;
-
   CNode* m_pNodeFree;
-
   struct CFX_Plex* m_pBlocks;
-
   int m_nBlockSize;
 
   CNode* NewNode(CNode* pPrev, CNode* pNext);
-
   void FreeNode(CNode* pNode);
 
  public:
   ~CFX_PtrList();
 };
 typedef void (*PD_CALLBACK_FREEDATA)(void* pData);
+
 struct FX_PRIVATEDATA {
   void FreeData();
 
   void* m_pModuleId;
-
   void* m_pData;
-
   PD_CALLBACK_FREEDATA m_pCallback;
-
   FX_BOOL m_bSelfDestruct;
 };
+
 class CFX_PrivateData {
  public:
+  CFX_PrivateData();
   ~CFX_PrivateData();
 
   void ClearAll();
@@ -798,11 +787,9 @@ class CFX_PrivateData {
   void SetPrivateData(void* module_id,
                       void* pData,
                       PD_CALLBACK_FREEDATA callback);
-
   void SetPrivateObj(void* module_id, CFX_DestructObject* pObj);
 
   void* GetPrivateData(void* module_id);
-
   FX_BOOL LookupPrivateData(void* module_id, void*& pData) const {
     if (!module_id) {
       return FALSE;
@@ -827,6 +814,7 @@ class CFX_PrivateData {
                PD_CALLBACK_FREEDATA callback,
                FX_BOOL bSelfDestruct);
 };
+
 class CFX_BitStream {
  public:
   void Init(const uint8_t* pData, FX_DWORD dwSize);
diff --git a/core/include/fxcrt/fx_stream.h b/core/include/fxcrt/fx_stream.h
index 4e2f0f97ce..d15d286031 100644
--- a/core/include/fxcrt/fx_stream.h
+++ b/core/include/fxcrt/fx_stream.h
@@ -20,20 +20,25 @@ FX_BOOL FX_GetNextFile(void* handle,
                        FX_BOOL& bFolder);
 void FX_CloseFolder(void* handle);
 FX_WCHAR FX_GetFolderSeparator();
+
 #if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
 #define FX_FILESIZE int32_t
 #else
 #include <fcntl.h>
 #include <sys/stat.h>
 #include <unistd.h>
+
 #ifndef O_BINARY
 #define O_BINARY 0
-#endif
+#endif  // O_BINARY
+
 #ifndef O_LARGEFILE
 #define O_LARGEFILE 0
-#endif
+#endif  // O_LARGEFILE
+
 #define FX_FILESIZE off_t
-#endif
+#endif  // _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
+
 #define FX_GETBYTEOFFSET32(a) 0
 #define FX_GETBYTEOFFSET40(a) 0
 #define FX_GETBYTEOFFSET48(a) 0
@@ -56,10 +61,7 @@ class IFX_StreamWrite {
 class IFX_FileWrite : public IFX_StreamWrite {
  public:
   // IFX_StreamWrite:
-  FX_BOOL WriteBlock(const void* pData, size_t size) override {
-    return WriteBlock(pData, GetSize(), size);
-  }
-
+  FX_BOOL WriteBlock(const void* pData, size_t size) override;
   virtual FX_FILESIZE GetSize() = 0;
   virtual FX_BOOL Flush() = 0;
   virtual FX_BOOL WriteBlock(const void* pData,
@@ -81,9 +83,9 @@ class IFX_FileRead : IFX_StreamRead {
  public:
   // IFX_StreamRead:
   void Release() override = 0;
-  FX_BOOL IsEOF() override { return FALSE; }
-  FX_FILESIZE GetPosition() override { return 0; }
-  size_t ReadBlock(void* buffer, size_t size) override { return 0; }
+  FX_BOOL IsEOF() override;
+  FX_FILESIZE GetPosition() override;
+  size_t ReadBlock(void* buffer, size_t size) override;
 
   virtual FX_BOOL ReadBlock(void* buffer, FX_FILESIZE offset, size_t size) = 0;
   virtual FX_FILESIZE GetSize() = 0;
@@ -108,9 +110,7 @@ class IFX_FileStream : public IFX_FileRead, public IFX_FileWrite {
   FX_BOOL WriteBlock(const void* buffer,
                      FX_FILESIZE offset,
                      size_t size) override = 0;
-  FX_BOOL WriteBlock(const void* buffer, size_t size) override {
-    return WriteBlock(buffer, GetSize(), size);
-  }
+  FX_BOOL WriteBlock(const void* buffer, size_t size) override;
   FX_BOOL Flush() override = 0;
 };
 
@@ -132,21 +132,19 @@ IFX_FileAccess* FX_CreateDefaultFileAccess(const CFX_WideStringC& wsPath);
 class IFX_MemoryStream : public IFX_FileStream {
  public:
   virtual FX_BOOL IsConsecutive() const = 0;
-
   virtual void EstimateSize(size_t nInitSize, size_t nGrowSize) = 0;
-
   virtual uint8_t* GetBuffer() const = 0;
-
   virtual void AttachBuffer(uint8_t* pBuffer,
                             size_t nSize,
                             FX_BOOL bTakeOver = FALSE) = 0;
-
   virtual void DetachBuffer() = 0;
 };
+
 IFX_MemoryStream* FX_CreateMemoryStream(uint8_t* pBuffer,
                                         size_t nSize,
                                         FX_BOOL bTakeOver = FALSE);
 IFX_MemoryStream* FX_CreateMemoryStream(FX_BOOL bConsecutive = FALSE);
+
 class IFX_BufferRead : public IFX_StreamRead {
  public:
   // IFX_StreamRead:
diff --git a/core/include/fxge/fx_dib.h b/core/include/fxge/fx_dib.h
index e39bad2b87..43746e5d48 100644
--- a/core/include/fxge/fx_dib.h
+++ b/core/include/fxge/fx_dib.h
@@ -160,30 +160,23 @@ FX_ARGB ArgbEncode(int a, FX_COLORREF rgb);
 #define FXSETFLAG_ALPHA_FILL(flag, val) flag = ((val) | (flag & 0xffffff00))
 #define FXSETFLAG_ALPHA_STROKE(flag, val) \
   flag = (((val) << 16) | (flag & 0xff00ffff))
+
 class CFX_DIBSource {
  public:
   virtual ~CFX_DIBSource();
 
   int GetWidth() const { return m_Width; }
-
   int GetHeight() const { return m_Height; }
 
   FXDIB_Format GetFormat() const {
     return (FXDIB_Format)(m_AlphaFlag * 0x100 + m_bpp);
   }
-
   FX_DWORD GetPitch() const { return m_Pitch; }
-
   FX_DWORD* GetPalette() const { return m_pPalette; }
 
-  virtual uint8_t* GetBuffer() const { return NULL; }
-
+  virtual uint8_t* GetBuffer() const;
   virtual const uint8_t* GetScanline(int line) const = 0;
-
-  virtual FX_BOOL SkipToScanline(int line, IFX_Pause* pPause) const {
-    return FALSE;
-  }
-
+  virtual FX_BOOL SkipToScanline(int line, IFX_Pause* pPause) const;
   virtual void DownSampleScanline(int line,
                                   uint8_t* dest_scan,
                                   int dest_bpp,
@@ -191,7 +184,6 @@ class CFX_DIBSource {
                                   FX_BOOL bFlipX,
                                   int clip_left,
                                   int clip_width) const = 0;
-
   virtual void SetDownSampleSize(int width, int height) {}
 
   int GetBPP() const { return m_bpp; }
@@ -219,7 +211,6 @@ class CFX_DIBSource {
   void CopyPalette(const FX_DWORD* pSrcPal, FX_DWORD size = 256);
 
   CFX_DIBitmap* Clone(const FX_RECT* pClip = NULL) const;
-
   CFX_DIBitmap* CloneConvert(FXDIB_Format format,
                              const FX_RECT* pClip = NULL,
                              void* pIccTransform = NULL) const;
@@ -228,7 +219,6 @@ class CFX_DIBSource {
                           int dest_height,
                           FX_DWORD flags = 0,
                           const FX_RECT* pClip = NULL) const;
-
   CFX_DIBitmap* TransformTo(const CFX_Matrix* pMatrix,
                             int& left,
                             int& top,
@@ -236,7 +226,6 @@ class CFX_DIBSource {
                             const FX_RECT* pClip = NULL) const;
 
   CFX_DIBitmap* GetAlphaMask(const FX_RECT* pClip = NULL) const;
-
   FX_BOOL CopyAlphaMask(const CFX_DIBSource* pAlphaMask,
                         const FX_RECT* pClip = NULL);
 
@@ -262,23 +251,15 @@ class CFX_DIBSource {
   CFX_DIBSource();
 
   int m_Width;
-
   int m_Height;
-
   int m_bpp;
-
   FX_DWORD m_AlphaFlag;
-
   FX_DWORD m_Pitch;
-
   FX_DWORD* m_pPalette;
 
   void BuildPalette();
-
   FX_BOOL BuildAlphaMask();
-
   int FindPalette(FX_DWORD color) const;
-
   void GetPalette(FX_DWORD* pal, int alpha) const;
 };
 class CFX_DIBitmap : public CFX_DIBSource {
@@ -296,10 +277,8 @@ class CFX_DIBitmap : public CFX_DIBSource {
   FX_BOOL Copy(const CFX_DIBSource* pSrc);
 
   // CFX_DIBSource
-  uint8_t* GetBuffer() const override { return m_pBuffer; }
-  const uint8_t* GetScanline(int line) const override {
-    return m_pBuffer ? m_pBuffer + line * m_Pitch : NULL;
-  }
+  uint8_t* GetBuffer() const override;
+  const uint8_t* GetScanline(int line) const override;
   void DownSampleScanline(int line,
                           uint8_t* dest_scan,
                           int dest_bpp,
diff --git a/core/include/fxge/fx_font.h b/core/include/fxge/fx_font.h
index 67ca1a7f4e..2902145594 100644
--- a/core/include/fxge/fx_font.h
+++ b/core/include/fxge/fx_font.h
@@ -365,14 +365,14 @@ class IFX_SystemFontInfo {
                         int pitch_family,
                         const FX_CHAR* face,
                         int& iExact) = 0;
+
 #ifdef PDF_ENABLE_XFA
   virtual void* MapFontByUnicode(FX_DWORD dwUnicode,
                                  int weight,
                                  FX_BOOL bItalic,
-                                 int pitch_family) {
-    return NULL;
-  }
+                                 int pitch_family);
 #endif  // PDF_ENABLE_XFA
+
   virtual void* GetFont(const FX_CHAR* face) = 0;
   virtual FX_DWORD GetFontData(void* hFont,
                                FX_DWORD table,
@@ -380,9 +380,9 @@ class IFX_SystemFontInfo {
                                FX_DWORD size) = 0;
   virtual FX_BOOL GetFaceName(void* hFont, CFX_ByteString& name) = 0;
   virtual FX_BOOL GetFontCharset(void* hFont, int& charset) = 0;
-  virtual int GetFaceIndex(void* hFont) { return 0; }
+  virtual int GetFaceIndex(void* hFont);
   virtual void DeleteFont(void* hFont) = 0;
-  virtual void* RetainFont(void* hFont) { return NULL; }
+  virtual void* RetainFont(void* hFont);
 
  protected:
   virtual ~IFX_SystemFontInfo() {}
@@ -446,6 +446,7 @@ class CFX_CountedFaceCache {
 
 class CFX_FontCache {
  public:
+  CFX_FontCache();
   ~CFX_FontCache();
   CFX_FaceCache* GetCachedFace(CFX_Font* pFont);
   void ReleaseCachedFace(CFX_Font* pFont);
@@ -456,6 +457,7 @@ class CFX_FontCache {
   CFX_FTCacheMap m_FTFaceMap;
   CFX_FTCacheMap m_ExtFaceMap;
 };
+
 class CFX_AutoFontCache {
  public:
   CFX_AutoFontCache(CFX_FontCache* pFontCache, CFX_Font* pFont)
diff --git a/core/src/fpdfapi/fpdf_font/fpdf_font.cpp b/core/src/fpdfapi/fpdf_font/fpdf_font.cpp
index a9deba665c..a64b5010c4 100644
--- a/core/src/fpdfapi/fpdf_font/fpdf_font.cpp
+++ b/core/src/fpdfapi/fpdf_font/fpdf_font.cpp
@@ -173,6 +173,74 @@ CPDF_Font::~CPDF_Font() {
   }
 }
 
+bool CPDF_Font::IsType1Font() const {
+  return false;
+}
+
+bool CPDF_Font::IsTrueTypeFont() const {
+  return false;
+}
+
+bool CPDF_Font::IsType3Font() const {
+  return false;
+}
+
+bool CPDF_Font::IsCIDFont() const {
+  return false;
+}
+
+const CPDF_Type1Font* CPDF_Font::AsType1Font() const {
+  return nullptr;
+}
+
+CPDF_Type1Font* CPDF_Font::AsType1Font() {
+  return nullptr;
+}
+
+const CPDF_TrueTypeFont* CPDF_Font::AsTrueTypeFont() const {
+  return nullptr;
+}
+
+CPDF_TrueTypeFont* CPDF_Font::AsTrueTypeFont() {
+  return nullptr;
+}
+
+const CPDF_Type3Font* CPDF_Font::AsType3Font() const {
+  return nullptr;
+}
+
+CPDF_Type3Font* CPDF_Font::AsType3Font() {
+  return nullptr;
+}
+
+const CPDF_CIDFont* CPDF_Font::AsCIDFont() const {
+  return nullptr;
+}
+
+CPDF_CIDFont* CPDF_Font::AsCIDFont() {
+  return nullptr;
+}
+
+FX_BOOL CPDF_Font::IsUnicodeCompatible() const {
+  return FALSE;
+}
+
+int CPDF_Font::CountChar(const FX_CHAR* pString, int size) const {
+  return size;
+}
+
+int CPDF_Font::GetCharSize(FX_DWORD charcode) const {
+  return 1;
+}
+
+int CPDF_Font::GlyphFromCharCode(FX_DWORD charcode, FX_BOOL* pVertGlyph) {
+  ASSERT(false);
+}
+
+int CPDF_Font::GlyphFromCharCodeExt(FX_DWORD charcode) {
+  return GlyphFromCharCode(charcode);
+}
+
 FX_BOOL CPDF_Font::IsVertWriting() const {
   FX_BOOL bVertWriting = FALSE;
   const CPDF_CIDFont* pCIDFont = AsCIDFont();
@@ -962,6 +1030,18 @@ FX_DWORD CPDF_SimpleFont::CharCodeFromUnicode(FX_WCHAR unicode) const {
 
 CPDF_Type1Font::CPDF_Type1Font() : m_Base14Font(-1) {}
 
+bool CPDF_Type1Font::IsType1Font() const {
+  return true;
+}
+
+const CPDF_Type1Font* CPDF_Type1Font::AsType1Font() const {
+  return this;
+}
+
+CPDF_Type1Font* CPDF_Type1Font::AsType1Font() {
+  return this;
+}
+
 FX_BOOL CPDF_Type1Font::Load() {
   m_Base14Font = PDF_GetStandardFontName(&m_BaseFont);
   if (m_Base14Font >= 0) {
@@ -1360,6 +1440,18 @@ CPDF_Object* CPDF_FontEncoding::Realize() {
 
 CPDF_TrueTypeFont::CPDF_TrueTypeFont() {}
 
+bool CPDF_TrueTypeFont::IsTrueTypeFont() const {
+  return true;
+}
+
+const CPDF_TrueTypeFont* CPDF_TrueTypeFont::AsTrueTypeFont() const {
+  return this;
+}
+
+CPDF_TrueTypeFont* CPDF_TrueTypeFont::AsTrueTypeFont() {
+  return this;
+}
+
 FX_BOOL CPDF_TrueTypeFont::Load() {
   return LoadCommon();
 }
@@ -1572,6 +1664,18 @@ CPDF_Type3Font::~CPDF_Type3Font() {
     delete it.second;
 }
 
+bool CPDF_Type3Font::IsType3Font() const {
+  return true;
+}
+
+const CPDF_Type3Font* CPDF_Type3Font::AsType3Font() const {
+  return this;
+}
+
+CPDF_Type3Font* CPDF_Type3Font::AsType3Font() {
+  return this;
+}
+
 FX_BOOL CPDF_Type3Font::Load() {
   m_pFontResources = m_pFontDict->GetDictBy("Resources");
   CPDF_Array* pMatrix = m_pFontDict->GetArrayBy("FontMatrix");
diff --git a/core/src/fpdfapi/fpdf_font/fpdf_font_cid.cpp b/core/src/fpdfapi/fpdf_font/fpdf_font_cid.cpp
index 7c85b8213d..38406394c4 100644
--- a/core/src/fpdfapi/fpdf_font/fpdf_font_cid.cpp
+++ b/core/src/fpdfapi/fpdf_font/fpdf_font_cid.cpp
@@ -1068,6 +1068,18 @@ CPDF_CIDFont::~CPDF_CIDFont() {
   delete m_pTTGSUBTable;
 }
 
+bool CPDF_CIDFont::IsCIDFont() const {
+  return true;
+}
+
+const CPDF_CIDFont* CPDF_CIDFont::AsCIDFont() const {
+  return this;
+}
+
+CPDF_CIDFont* CPDF_CIDFont::AsCIDFont() {
+  return this;
+}
+
 FX_WORD CPDF_CIDFont::CIDFromCharCode(FX_DWORD charcode) const {
   if (!m_pCMap) {
     return (FX_WORD)charcode;
diff --git a/core/src/fpdfapi/fpdf_parser/fpdf_parser_encrypt.cpp b/core/src/fpdfapi/fpdf_parser/fpdf_parser_encrypt.cpp
index 799e748761..95907ae8fd 100644
--- a/core/src/fpdfapi/fpdf_parser/fpdf_parser_encrypt.cpp
+++ b/core/src/fpdfapi/fpdf_parser/fpdf_parser_encrypt.cpp
@@ -56,6 +56,7 @@ void CalcEncryptKey(CPDF_Dictionary* pEncrypt,
   FXSYS_memset(key, 0, keylen);
   FXSYS_memcpy(key, digest, copy_len);
 }
+
 CPDF_CryptoHandler* CPDF_StandardSecurityHandler::CreateCryptoHandler() {
   return new CPDF_StandardCryptoHandler;
 }
diff --git a/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp b/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp
index 737bbe49be..e18775e54b 100644
--- a/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp
+++ b/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp
@@ -4144,7 +4144,7 @@ FX_BOOL CPDF_DataAvail::CheckPageNode(CPDF_PageNode& pageNodes,
       continue;
 
     switch (pNode->m_type) {
-      case PDF_PAGENODE_UNKOWN:
+      case PDF_PAGENODE_UNKNOWN:
         if (!CheckUnkownPageNode(pNode->m_dwPageNo, pNode, pHints)) {
           return FALSE;
         }
@@ -4586,6 +4586,8 @@ IPDF_DataAvail::DocFormStatus CPDF_DataAvail::IsFormAvail(
   return FormAvailable;
 }
 
+CPDF_PageNode::CPDF_PageNode() : m_type(PDF_PAGENODE_UNKNOWN) {}
+
 CPDF_PageNode::~CPDF_PageNode() {
   for (int32_t i = 0; i < m_childNode.GetSize(); ++i)
     delete m_childNode[i];
diff --git a/core/src/fxcrt/fx_basic_buffer.cpp b/core/src/fxcrt/fx_basic_buffer.cpp
index 9578653019..f623d995c7 100644
--- a/core/src/fxcrt/fx_basic_buffer.cpp
+++ b/core/src/fxcrt/fx_basic_buffer.cpp
@@ -19,6 +19,8 @@ CFX_BinaryBuf::CFX_BinaryBuf(FX_STRSIZE size)
   m_pBuffer.reset(FX_Alloc(uint8_t, size));
 }
 
+CFX_BinaryBuf::~CFX_BinaryBuf() {}
+
 void CFX_BinaryBuf::Delete(int start_index, int count) {
   if (!m_pBuffer || start_index < 0 || count < 0 || count > m_DataSize ||
       start_index > m_DataSize - count) {
@@ -364,6 +366,8 @@ FX_DWORD CFX_BitStream::GetBits(FX_DWORD nBits) {
 CFX_FileBufferArchive::CFX_FileBufferArchive()
     : m_Length(0), m_pFile(nullptr) {}
 
+CFX_FileBufferArchive::~CFX_FileBufferArchive() {}
+
 void CFX_FileBufferArchive::Clear() {
   m_Length = 0;
   m_pBuffer.reset();
diff --git a/core/src/fxcrt/fx_basic_util.cpp b/core/src/fxcrt/fx_basic_util.cpp
index 7228af1a8a..2422212d59 100644
--- a/core/src/fxcrt/fx_basic_util.cpp
+++ b/core/src/fxcrt/fx_basic_util.cpp
@@ -16,6 +16,8 @@
 #include <direct.h>
 #endif
 
+CFX_PrivateData::CFX_PrivateData() {}
+
 CFX_PrivateData::~CFX_PrivateData() {
   ClearAll();
 }
diff --git a/core/src/fxge/dib/fx_dib_main.cpp b/core/src/fxge/dib/fx_dib_main.cpp
index 4922373ec0..ab4c170af5 100644
--- a/core/src/fxge/dib/fx_dib_main.cpp
+++ b/core/src/fxge/dib/fx_dib_main.cpp
@@ -42,6 +42,7 @@ FX_DWORD ArgbEncode(int a, FX_COLORREF rgb) {
   return FXARGB_MAKE(a, FXSYS_GetRValue(rgb), FXSYS_GetGValue(rgb),
                      FXSYS_GetBValue(rgb));
 }
+
 CFX_DIBSource::CFX_DIBSource() {
   m_bpp = 0;
   m_AlphaFlag = 0;
@@ -50,15 +51,26 @@ CFX_DIBSource::CFX_DIBSource() {
   m_pPalette = NULL;
   m_pAlphaMask = NULL;
 }
+
 CFX_DIBSource::~CFX_DIBSource() {
   FX_Free(m_pPalette);
   delete m_pAlphaMask;
 }
+
+uint8_t* CFX_DIBSource::GetBuffer() const {
+  return NULL;
+}
+
+FX_BOOL CFX_DIBSource::SkipToScanline(int line, IFX_Pause* pPause) const {
+  return FALSE;
+}
+
 CFX_DIBitmap::CFX_DIBitmap() {
   m_bExtBuf = FALSE;
   m_pBuffer = NULL;
   m_pPalette = NULL;
 }
+
 #define _MAX_OOM_LIMIT_ 12000000
 FX_BOOL CFX_DIBitmap::Create(int width,
                              int height,
@@ -113,6 +125,7 @@ FX_BOOL CFX_DIBitmap::Create(int width,
   }
   return TRUE;
 }
+
 FX_BOOL CFX_DIBitmap::Copy(const CFX_DIBSource* pSrc) {
   if (m_pBuffer) {
     return FALSE;
@@ -127,24 +140,34 @@ FX_BOOL CFX_DIBitmap::Copy(const CFX_DIBSource* pSrc) {
   }
   return TRUE;
 }
+
 CFX_DIBitmap::~CFX_DIBitmap() {
-  if (!m_bExtBuf) {
+  if (!m_bExtBuf)
     FX_Free(m_pBuffer);
-  }
-  m_pBuffer = NULL;
+
+  m_pBuffer = nullptr;
 }
+
+uint8_t* CFX_DIBitmap::GetBuffer() const {
+  return m_pBuffer;
+}
+
+const uint8_t* CFX_DIBitmap::GetScanline(int line) const {
+  return m_pBuffer ? m_pBuffer + line * m_Pitch : nullptr;
+}
+
 void CFX_DIBitmap::TakeOver(CFX_DIBitmap* pSrcBitmap) {
-  if (!m_bExtBuf) {
+  if (!m_bExtBuf)
     FX_Free(m_pBuffer);
-  }
+
   FX_Free(m_pPalette);
   delete m_pAlphaMask;
   m_pBuffer = pSrcBitmap->m_pBuffer;
   m_pPalette = pSrcBitmap->m_pPalette;
   m_pAlphaMask = pSrcBitmap->m_pAlphaMask;
-  pSrcBitmap->m_pBuffer = NULL;
-  pSrcBitmap->m_pPalette = NULL;
-  pSrcBitmap->m_pAlphaMask = NULL;
+  pSrcBitmap->m_pBuffer = nullptr;
+  pSrcBitmap->m_pPalette = nullptr;
+  pSrcBitmap->m_pAlphaMask = nullptr;
   m_bpp = pSrcBitmap->m_bpp;
   m_bExtBuf = pSrcBitmap->m_bExtBuf;
   m_AlphaFlag = pSrcBitmap->m_AlphaFlag;
@@ -152,6 +175,7 @@ void CFX_DIBitmap::TakeOver(CFX_DIBitmap* pSrcBitmap) {
   m_Height = pSrcBitmap->m_Height;
   m_Pitch = pSrcBitmap->m_Pitch;
 }
+
 CFX_DIBitmap* CFX_DIBSource::Clone(const FX_RECT* pClip) const {
   FX_RECT rect(0, 0, m_Width, m_Height);
   if (pClip) {
diff --git a/core/src/fxge/ge/fx_ge_fontmap.cpp b/core/src/fxge/ge/fx_ge_fontmap.cpp
index 890de616d1..cd46148b7f 100644
--- a/core/src/fxge/ge/fx_ge_fontmap.cpp
+++ b/core/src/fxge/ge/fx_ge_fontmap.cpp
@@ -1281,8 +1281,23 @@ FXFT_Face CFX_FontMapper::FindSubstFontByUnicode(FX_DWORD dwUnicode,
   m_pFontInfo->DeleteFont(hFont);
   return face;
 }
+
+void* IFX_SystemFontInfo::MapFontByUnicode(FX_DWORD dwUnicode,
+                                           int weight,
+                                           FX_BOOL bItalic,
+                                           int pitch_family) {
+  return nullptr;
+}
 #endif  // PDF_ENABLE_XFA
 
+int IFX_SystemFontInfo::GetFaceIndex(void* hFont) {
+  return 0;
+}
+
+void* IFX_SystemFontInfo::RetainFont(void* hFont) {
+  return NULL;
+}
+
 int CFX_FontMapper::GetFaceSize() const {
   return pdfium::CollectionSize<int>(m_FaceArray);
 }
@@ -1308,11 +1323,13 @@ unsigned long _FTStreamRead(FXFT_Stream stream,
                             unsigned long count);
 void _FTStreamClose(FXFT_Stream stream);
 };
+
 #if _FX_OS_ == _FX_ANDROID_
 IFX_SystemFontInfo* IFX_SystemFontInfo::CreateDefault(const char** pUnused) {
   return NULL;
 }
 #endif
+
 CFX_FolderFontInfo::CFX_FolderFontInfo() {}
 CFX_FolderFontInfo::~CFX_FolderFontInfo() {
   for (const auto& pair : m_FontList) {
diff --git a/core/src/fxge/ge/fx_ge_text.cpp b/core/src/fxge/ge/fx_ge_text.cpp
index 8d54363d14..8fb03d86eb 100644
--- a/core/src/fxge/ge/fx_ge_text.cpp
+++ b/core/src/fxge/ge/fx_ge_text.cpp
@@ -1167,6 +1167,9 @@ FX_BOOL CFX_RenderDevice::DrawTextPath(int nChars,
   }
   return TRUE;
 }
+
+CFX_FontCache::CFX_FontCache() {}
+
 CFX_FontCache::~CFX_FontCache() {
   FreeCache(TRUE);
 }