Move core/fpdfapi/fpdf_font to core/fpdfapi/font

BUG=pdfium:603

Review-Url: https://codereview.chromium.org/2392773003

1 files changed, 132 insertions, 0 deletions

diff --git a/core/fpdfapi/font/cpdf_font.h b/core/fpdfapi/font/cpdf_font.h
new file mode 100644
index 0000000000..244ab72158
--- /dev/null
+++ b/core/fpdfapi/font/cpdf_font.h
@@ -0,0 +1,132 @@
+// Copyright 2016 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_FPDFAPI_FONT_CPDF_FONT_H_
+#define CORE_FPDFAPI_FONT_CPDF_FONT_H_
+
+#include <memory>
+#include <vector>
+
+#include "core/fxcrt/fx_string.h"
+#include "core/fxcrt/fx_system.h"
+#include "core/fxge/fx_font.h"
+
+#define PDFFONT_FIXEDPITCH 1
+#define PDFFONT_SERIF 2
+#define PDFFONT_SYMBOLIC 4
+#define PDFFONT_SCRIPT 8
+#define PDFFONT_NONSYMBOLIC 32
+#define PDFFONT_ITALIC 64
+#define PDFFONT_ALLCAP 0x10000
+#define PDFFONT_SMALLCAP 0x20000
+#define PDFFONT_FORCEBOLD 0x40000
+#define PDFFONT_USEEXTERNATTR 0x80000
+
+class CFX_SubstFont;
+class CPDF_CIDFont;
+class CPDF_Dictionary;
+class CPDF_Document;
+class CPDF_Object;
+class CPDF_StreamAcc;
+class CPDF_TrueTypeFont;
+class CPDF_Type1Font;
+class CPDF_Type3Font;
+class CPDF_ToUnicodeMap;
+
+class CPDF_Font {
+ public:
+  static std::unique_ptr<CPDF_Font> Create(CPDF_Document* pDoc,
+                                           CPDF_Dictionary* pFontDict);
+  static CPDF_Font* GetStockFont(CPDF_Document* pDoc,
+                                 const CFX_ByteStringC& fontname);
+  static const uint32_t kInvalidCharCode = static_cast<uint32_t>(-1);
+
+  virtual ~CPDF_Font();
+
+  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 bool IsVertWriting() const;
+  virtual bool IsUnicodeCompatible() const;
+  virtual uint32_t GetNextChar(const FX_CHAR* pString,
+                               int nStrLen,
+                               int& offset) const;
+  virtual int CountChar(const FX_CHAR* pString, int size) const;
+  virtual int AppendChar(FX_CHAR* buf, uint32_t charcode) const;
+  virtual int GetCharSize(uint32_t charcode) const;
+  virtual int GlyphFromCharCode(uint32_t charcode, bool* pVertGlyph) = 0;
+  virtual int GlyphFromCharCodeExt(uint32_t charcode);
+  virtual CFX_WideString UnicodeFromCharCode(uint32_t charcode) const;
+  virtual uint32_t CharCodeFromUnicode(FX_WCHAR Unicode) const;
+
+  const CFX_ByteString& GetBaseFont() const { return m_BaseFont; }
+  CFX_SubstFont* GetSubstFont() const { return m_Font.GetSubstFont(); }
+  uint32_t GetFlags() const { return m_Flags; }
+  bool IsEmbedded() const { return IsType3Font() || m_pFontFile != nullptr; }
+  CPDF_StreamAcc* GetFontFile() const { return m_pFontFile; }
+  CPDF_Dictionary* GetFontDict() const { return m_pFontDict; }
+  bool IsStandardFont() const;
+  FXFT_Face GetFace() const { return m_Font.GetFace(); }
+  void AppendChar(CFX_ByteString& str, uint32_t charcode) const;
+
+  void GetFontBBox(FX_RECT& rect) const { rect = m_FontBBox; }
+  int GetTypeAscent() const { return m_Ascent; }
+  int GetTypeDescent() const { return m_Descent; }
+  int GetItalicAngle() const { return m_ItalicAngle; }
+  int GetStemV() const { return m_StemV; }
+  int GetStringWidth(const FX_CHAR* pString, int size);
+  uint32_t FallbackFontFromCharcode(uint32_t charcode);
+  int FallbackGlyphFromCharcode(int fallbackFont, uint32_t charcode);
+
+  virtual int GetCharWidthF(uint32_t charcode) = 0;
+  virtual FX_RECT GetCharBBox(uint32_t charcode) = 0;
+
+  CPDF_Document* m_pDocument;
+  CFX_Font m_Font;
+  std::vector<std::unique_ptr<CFX_Font>> m_FontFallbacks;
+
+ protected:
+  CPDF_Font();
+
+  virtual bool Load() = 0;
+
+  void LoadUnicodeMap() const;  // logically const only.
+  void LoadPDFEncoding(CPDF_Object* pEncoding,
+                       int& iBaseEncoding,
+                       std::vector<CFX_ByteString>* pCharNames,
+                       bool bEmbedded,
+                       bool bTrueType);
+  void LoadFontDescriptor(CPDF_Dictionary* pDict);
+  void CheckFontMetrics();
+
+  const FX_CHAR* GetAdobeCharName(int iBaseEncoding,
+                                  const std::vector<CFX_ByteString>& charnames,
+                                  int charcode);
+
+  CFX_ByteString m_BaseFont;
+  CPDF_StreamAcc* m_pFontFile;
+  CPDF_Dictionary* m_pFontDict;
+  mutable std::unique_ptr<CPDF_ToUnicodeMap> m_pToUnicodeMap;
+  mutable bool m_bToUnicodeLoaded;
+  int m_Flags;
+  FX_RECT m_FontBBox;
+  int m_StemV;
+  int m_Ascent;
+  int m_Descent;
+  int m_ItalicAngle;
+};
+
+#endif  // CORE_FPDFAPI_FONT_CPDF_FONT_H_