core/include/fxge/fx_font.h

// 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

#ifndef CORE_INCLUDE_FXGE_FX_FONT_H_
#define CORE_INCLUDE_FXGE_FX_FONT_H_

#include <map>

#include "../fxcrt/fx_system.h"
#include "fx_dib.h"
#include "third_party/base/nonstd_unique_ptr.h"

typedef struct FT_FaceRec_* FXFT_Face;
typedef void* FXFT_Library;

class CFX_FaceCache;
class CFX_FontFaceInfo;
class CFX_FontMapper;
class CFX_PathData;
class CFX_SizeGlyphCache;
class CFX_SubstFont;
class CTTFontDesc;
class IFX_FontEncoding;
class IFX_SystemFontInfo;

#define FXFONT_FIXED_PITCH 0x01
#define FXFONT_SERIF 0x02
#define FXFONT_SYMBOLIC 0x04
#define FXFONT_SCRIPT 0x08
#define FXFONT_ITALIC 0x40
#define FXFONT_BOLD 0x40000
#define FXFONT_USEEXTERNATTR 0x80000
#define FXFONT_CIDFONT 0x100000
#define FXFONT_ANSI_CHARSET 0
#define FXFONT_DEFAULT_CHARSET 1
#define FXFONT_SYMBOL_CHARSET 2
#define FXFONT_SHIFTJIS_CHARSET 128
#define FXFONT_HANGEUL_CHARSET 129
#define FXFONT_GB2312_CHARSET 134
#define FXFONT_CHINESEBIG5_CHARSET 136
#define FXFONT_THAI_CHARSET 222
#define FXFONT_EASTEUROPE_CHARSET 238
#define FXFONT_RUSSIAN_CHARSET 204
#define FXFONT_GREEK_CHARSET 161
#define FXFONT_TURKISH_CHARSET 162
#define FXFONT_HEBREW_CHARSET 177
#define FXFONT_ARABIC_CHARSET 178
#define FXFONT_BALTIC_CHARSET 186
#define FXFONT_FF_FIXEDPITCH 1
#define FXFONT_FF_ROMAN (1 << 4)
#define FXFONT_FF_SCRIPT (4 << 4)
#define FXFONT_FW_NORMAL 400
#define FXFONT_FW_BOLD 700

class CFX_Font {
 public:
  CFX_Font();
  ~CFX_Font();

  void LoadSubst(const CFX_ByteString& face_name,
                 FX_BOOL bTrueType,
                 FX_DWORD flags,
                 int weight,
                 int italic_angle,
                 int CharsetCP,
                 FX_BOOL bVertical = FALSE);
  FX_BOOL LoadEmbedded(const uint8_t* data, FX_DWORD size);
  FXFT_Face GetFace() const { return m_Face; }
  const CFX_SubstFont* GetSubstFont() const { return m_pSubstFont; }
  CFX_PathData* LoadGlyphPath(FX_DWORD glyph_index, int dest_width = 0);
  int GetGlyphWidth(FX_DWORD glyph_index);
  int GetAscent() const;
  int GetDescent() const;
  FX_BOOL GetGlyphBBox(FX_DWORD glyph_index, FX_RECT& bbox);
  FX_BOOL IsItalic() const;
  FX_BOOL IsBold() const;
  FX_BOOL IsFixedWidth() const;
  FX_BOOL IsVertical() const { return m_bVertical; }
  CFX_WideString GetPsName() const;
  CFX_ByteString GetFamilyName() const;
  CFX_ByteString GetFaceName() const;
  FX_BOOL IsTTFont() const;
  FX_BOOL GetBBox(FX_RECT& bbox);
  int GetHeight() const;
  int GetULPos() const;
  int GetULthickness() const;
  int GetMaxAdvanceWidth() const;
  FX_BOOL IsEmbedded() const { return m_bEmbedded; }
  uint8_t* GetSubData() const { return m_pGsubData; }
  void SetSubData(uint8_t* data) { m_pGsubData = data; }
  void* GetPlatformFont() const { return m_pPlatformFont; }
  void SetPlatformFont(void* font) { m_pPlatformFont = font; }
  uint8_t* GetFontData() const { return m_pFontData; }
  FX_DWORD GetSize() const { return m_dwSize; }
  void AdjustMMParams(int glyph_index, int width, int weight);

 private:
  void ReleasePlatformResource();
  void DeleteFace();

  FXFT_Face m_Face;
  CFX_SubstFont* m_pSubstFont;
  uint8_t* m_pFontDataAllocation;
  uint8_t* m_pFontData;
  uint8_t* m_pGsubData;
  FX_DWORD m_dwSize;
  CFX_BinaryBuf m_OtfFontData;
  void* m_hHandle;
  void* m_pPlatformFont;
  void* m_pPlatformFontCollection;
  void* m_pDwFont;
  FX_BOOL m_bDwLoaded;
  FX_BOOL m_bEmbedded;
  FX_BOOL m_bVertical;
};

#define ENCODING_INTERNAL 0
#define ENCODING_UNICODE 1

class CFX_UnicodeEncoding {
 public:
  explicit CFX_UnicodeEncoding(CFX_Font* pFont);
  ~CFX_UnicodeEncoding();

  FX_DWORD GlyphFromCharCode(FX_DWORD charcode);

 private:
  // Unowned, not nullptr.
  CFX_Font* m_pFont;
};

#define FXFONT_SUBST_MM 0x01
#define FXFONT_SUBST_GLYPHPATH 0x04
#define FXFONT_SUBST_CLEARTYPE 0x08
#define FXFONT_SUBST_TRANSFORM 0x10
#define FXFONT_SUBST_NONSYMBOL 0x20
#define FXFONT_SUBST_EXACT 0x40
#define FXFONT_SUBST_STANDARD 0x80
class CFX_SubstFont {
 public:
  CFX_SubstFont();

  void* m_ExtHandle;

  CFX_ByteString m_Family;

  int m_Charset;

  FX_DWORD m_SubstFlags;

  int m_Weight;

  int m_ItalicAngle;

  FX_BOOL m_bSubstOfCJK;

  int m_WeightCJK;

  FX_BOOL m_bItlicCJK;
};
#define FX_FONT_FLAG_SERIF 0x01
#define FX_FONT_FLAG_FIXEDPITCH 0x02
#define FX_FONT_FLAG_ITALIC 0x04
#define FX_FONT_FLAG_BOLD 0x08
#define FX_FONT_FLAG_SYMBOLIC_SYMBOL 0x10
#define FX_FONT_FLAG_SYMBOLIC_DINGBATS 0x20
#define FX_FONT_FLAG_MULTIPLEMASTER 0x40

class CFX_FontMgr {
 public:
  CFX_FontMgr();
  ~CFX_FontMgr();

  FXFT_Face GetCachedFace(const CFX_ByteString& face_name,
                          int weight,
                          FX_BOOL bItalic,
                          uint8_t*& pFontData);
  FXFT_Face AddCachedFace(const CFX_ByteString& face_name,
                          int weight,
                          FX_BOOL bItalic,
                          uint8_t* pData,
                          FX_DWORD size,
                          int face_index);
  FXFT_Face GetCachedTTCFace(int ttc_size,
                             FX_DWORD checksum,
                             int font_offset,
                             uint8_t*& pFontData);
  FXFT_Face AddCachedTTCFace(int ttc_size,
                             FX_DWORD checksum,
                             uint8_t* pData,
                             FX_DWORD size,
                             int font_offset);
  FXFT_Face GetFileFace(const FX_CHAR* filename, int face_index);
  FXFT_Face GetFixedFace(const uint8_t* pData, FX_DWORD size, int face_index);
  void ReleaseFace(FXFT_Face face);
  void SetSystemFontInfo(IFX_SystemFontInfo* pFontInfo);
  FXFT_Face FindSubstFont(const CFX_ByteString& face_name,
                          FX_BOOL bTrueType,
                          FX_DWORD flags,
                          int weight,
                          int italic_angle,
                          int CharsetCP,
                          CFX_SubstFont* pSubstFont);
  bool GetBuiltinFont(size_t index, const uint8_t** pFontData, FX_DWORD* size);
  CFX_FontMapper* GetBuiltinMapper() const { return m_pBuiltinMapper.get(); }
  FXFT_Library GetFTLibrary() const { return m_FTLibrary; }

 private:
  void InitFTLibrary();

  nonstd::unique_ptr<CFX_FontMapper> m_pBuiltinMapper;
  std::map<CFX_ByteString, CTTFontDesc*> m_FaceMap;
  FXFT_Library m_FTLibrary;
};

class IFX_FontEnumerator {
 public:
  virtual void HitFont() = 0;

  virtual void Finish() = 0;

 protected:
  virtual ~IFX_FontEnumerator() {}
};

class IFX_AdditionalFontEnum {
 public:
  virtual int CountFiles() = 0;
  virtual IFX_FileStream* GetFontFile(int index) = 0;

 protected:
  virtual ~IFX_AdditionalFontEnum() {}
};

class CFX_FontMapper {
 public:
  explicit CFX_FontMapper(CFX_FontMgr* mgr);
  ~CFX_FontMapper();

  void SetSystemFontInfo(IFX_SystemFontInfo* pFontInfo);
  IFX_SystemFontInfo* GetSystemFontInfo() { return m_pFontInfo; }
  void AddInstalledFont(const CFX_ByteString& name, int charset);
  void LoadInstalledFonts();
  CFX_ByteStringArray m_InstalledTTFonts;
  void SetFontEnumerator(IFX_FontEnumerator* pFontEnumerator) {
    m_pFontEnumerator = pFontEnumerator;
  }
  IFX_FontEnumerator* GetFontEnumerator() const { return m_pFontEnumerator; }
  FXFT_Face FindSubstFont(const CFX_ByteString& face_name,
                          FX_BOOL bTrueType,
                          FX_DWORD flags,
                          int weight,
                          int italic_angle,
                          int CharsetCP,
                          CFX_SubstFont* pSubstFont);

 private:
  static const size_t MM_FACE_COUNT = 2;
  static const size_t FOXIT_FACE_COUNT = 14;

  CFX_ByteString GetPSNameFromTT(void* hFont);
  CFX_ByteString MatchInstalledFonts(const CFX_ByteString& norm_name);
  FXFT_Face UseInternalSubst(CFX_SubstFont* pSubstFont,
                             int iBaseFont,
                             int italic_angle,
                             int weight,
                             int picthfamily);

  FX_BOOL m_bListLoaded;
  FXFT_Face m_MMFaces[MM_FACE_COUNT];
  CFX_ByteString m_LastFamily;
  CFX_DWordArray m_CharsetArray;
  CFX_ByteStringArray m_FaceArray;
  IFX_SystemFontInfo* m_pFontInfo;
  FXFT_Face m_FoxitFaces[FOXIT_FACE_COUNT];
  IFX_FontEnumerator* m_pFontEnumerator;
  CFX_FontMgr* const m_pFontMgr;
};

class IFX_SystemFontInfo {
 public:
  static IFX_SystemFontInfo* CreateDefault(const char** pUserPaths);
  virtual void Release() = 0;

  virtual FX_BOOL EnumFontList(CFX_FontMapper* pMapper) = 0;
  virtual void* MapFont(int weight,
                        FX_BOOL bItalic,
                        int charset,
                        int pitch_family,
                        const FX_CHAR* face,
                        int& iExact) = 0;
  virtual void* GetFont(const FX_CHAR* face) = 0;
  virtual FX_DWORD GetFontData(void* hFont,
                               FX_DWORD table,
                               uint8_t* buffer,
                               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 void DeleteFont(void* hFont) = 0;
  virtual void* RetainFont(void* hFont) { return NULL; }

 protected:
  virtual ~IFX_SystemFontInfo() {}
};

class CFX_FolderFontInfo : public IFX_SystemFontInfo {
 public:
  CFX_FolderFontInfo();
  ~CFX_FolderFontInfo() override;
  void AddPath(const CFX_ByteStringC& path);

  // IFX_SytemFontInfo:
  void Release() override;
  FX_BOOL EnumFontList(CFX_FontMapper* pMapper) override;
  void* MapFont(int weight,
                FX_BOOL bItalic,
                int charset,
                int pitch_family,
                const FX_CHAR* face,
                int& bExact) override;
  void* GetFont(const FX_CHAR* face) override;
  FX_DWORD GetFontData(void* hFont,
                       FX_DWORD table,
                       uint8_t* buffer,
                       FX_DWORD size) override;
  void DeleteFont(void* hFont) override;
  FX_BOOL GetFaceName(void* hFont, CFX_ByteString& name) override;
  FX_BOOL GetFontCharset(void* hFont, int& charset) override;

 protected:
  std::map<CFX_ByteString, CFX_FontFaceInfo*> m_FontList;
  CFX_ByteStringArray m_PathList;
  CFX_FontMapper* m_pMapper;
  void ScanPath(CFX_ByteString& path);
  void ScanFile(CFX_ByteString& path);
  void ReportFace(CFX_ByteString& path,
                  FXSYS_FILE* pFile,
                  FX_DWORD filesize,
                  FX_DWORD offset);
  void* GetSubstFont(const CFX_ByteString& face);
  void* FindFont(int weight,
                 FX_BOOL bItalic,
                 int charset,
                 int pitch_family,
                 const FX_CHAR* family,
                 FX_BOOL bMatchName);
};
class CFX_CountedFaceCache {
 public:
  CFX_FaceCache* m_Obj;
  FX_DWORD m_nCount;
};

class CFX_FontCache {
 public:
  ~CFX_FontCache();
  CFX_FaceCache* GetCachedFace(CFX_Font* pFont);
  void ReleaseCachedFace(CFX_Font* pFont);
  void FreeCache(FX_BOOL bRelease = FALSE);

 private:
  using CFX_FTCacheMap = std::map<FXFT_Face, CFX_CountedFaceCache*>;
  CFX_FTCacheMap m_FTFaceMap;
  CFX_FTCacheMap m_ExtFaceMap;
};
class CFX_AutoFontCache {
 public:
  CFX_AutoFontCache(CFX_FontCache* pFontCache, CFX_Font* pFont)
      : m_pFontCache(pFontCache), m_pFont(pFont) {}
  ~CFX_AutoFontCache() { m_pFontCache->ReleaseCachedFace(m_pFont); }
  CFX_FontCache* m_pFontCache;
  CFX_Font* m_pFont;
};
#define FX_FONTCACHE_DEFINE(pFontCache, pFont) \
  CFX_AutoFontCache autoFontCache((pFontCache), (pFont))
class CFX_GlyphBitmap {
 public:
  int m_Top;
  int m_Left;
  CFX_DIBitmap m_Bitmap;
};
class CFX_FaceCache {
 public:
  ~CFX_FaceCache();
  const CFX_GlyphBitmap* LoadGlyphBitmap(CFX_Font* pFont,
                                         FX_DWORD glyph_index,
                                         FX_BOOL bFontStyle,
                                         const CFX_AffineMatrix* pMatrix,
                                         int dest_width,
                                         int anti_alias,
                                         int& text_flags);
  const CFX_PathData* LoadGlyphPath(CFX_Font* pFont,
                                    FX_DWORD glyph_index,
                                    int dest_width);

  CFX_FaceCache(FXFT_Face face);

 private:
  FXFT_Face m_Face;
  CFX_GlyphBitmap* RenderGlyph(CFX_Font* pFont,
                               FX_DWORD glyph_index,
                               FX_BOOL bFontStyle,
                               const CFX_AffineMatrix* pMatrix,
                               int dest_width,
                               int anti_alias);
  CFX_GlyphBitmap* RenderGlyph_Nativetext(CFX_Font* pFont,
                                          FX_DWORD glyph_index,
                                          const CFX_AffineMatrix* pMatrix,
                                          int dest_width,
                                          int anti_alias);
  CFX_GlyphBitmap* LookUpGlyphBitmap(CFX_Font* pFont,
                                     const CFX_AffineMatrix* pMatrix,
                                     CFX_ByteStringC& FaceGlyphsKey,
                                     FX_DWORD glyph_index,
                                     FX_BOOL bFontStyle,
                                     int dest_width,
                                     int anti_alias);
  std::map<CFX_ByteString, CFX_SizeGlyphCache*> m_SizeMap;
  CFX_MapPtrToPtr m_PathMap;
  CFX_DIBitmap* m_pBitmap;

  void InitPlatform();
  void DestroyPlatform();
};
typedef struct {
  const CFX_GlyphBitmap* m_pGlyph;
  int m_OriginX, m_OriginY;
  FX_FLOAT m_fOriginX, m_fOriginY;
} FXTEXT_GLYPHPOS;
FX_RECT FXGE_GetGlyphsBBox(FXTEXT_GLYPHPOS* pGlyphAndPos,
                           int nChars,
                           int anti_alias,
                           FX_FLOAT retinaScaleX = 1.0f,
                           FX_FLOAT retinaScaleY = 1.0f);

class IFX_GSUBTable {
 public:
  static IFX_GSUBTable* Create(CFX_Font* pFont);
  virtual FX_BOOL GetVerticalGlyph(FX_DWORD glyphnum, FX_DWORD* vglyphnum) = 0;

 protected:
  virtual ~IFX_GSUBTable() {}
};

CFX_ByteString GetNameFromTT(const uint8_t* name_table, FX_DWORD name);

int PDF_GetStandardFontName(CFX_ByteString* name);

#endif  // CORE_INCLUDE_FXGE_FX_FONT_H_