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1 // Copyright 2016 PDFium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4 
5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
6 
7 #ifndef CORE_FPDFAPI_FONT_CPDF_CIDFONT_H_
8 #define CORE_FPDFAPI_FONT_CPDF_CIDFONT_H_
9 
10 #include <memory>
11 #include <vector>
12 
13 #include "core/fpdfapi/font/cpdf_font.h"
14 #include "core/fxcrt/fx_string.h"
15 #include "core/fxcrt/fx_system.h"
16 #include "core/fxcrt/retain_ptr.h"
17 #include "core/fxcrt/unowned_ptr.h"
18 
19 enum CIDSet : uint8_t {
20   CIDSET_UNKNOWN,
21   CIDSET_GB1,
22   CIDSET_CNS1,
23   CIDSET_JAPAN1,
24   CIDSET_KOREA1,
25   CIDSET_UNICODE,
26   CIDSET_NUM_SETS
27 };
28 
29 class CFX_CTTGSUBTable;
30 class CPDF_Array;
31 class CPDF_CID2UnicodeMap;
32 class CPDF_CMap;
33 class CPDF_StreamAcc;
34 
35 class CPDF_CIDFont : public CPDF_Font {
36  public:
37   CPDF_CIDFont();
38   ~CPDF_CIDFont() override;
39 
40   static float CIDTransformToFloat(uint8_t ch);
41 
42   // CPDF_Font:
43   bool IsCIDFont() const override;
44   const CPDF_CIDFont* AsCIDFont() const override;
45   CPDF_CIDFont* AsCIDFont() override;
46   int GlyphFromCharCode(uint32_t charcode, bool* pVertGlyph) override;
47   int GetCharWidthF(uint32_t charcode) override;
48   FX_RECT GetCharBBox(uint32_t charcode) override;
49   uint32_t GetNextChar(const char* pString,
50                        int nStrLen,
51                        int& offset) const override;
52   int CountChar(const char* pString, int size) const override;
53   int AppendChar(char* str, uint32_t charcode) const override;
54   bool IsVertWriting() const override;
55   bool IsUnicodeCompatible() const override;
56   bool Load() override;
57   WideString UnicodeFromCharCode(uint32_t charcode) const override;
58   uint32_t CharCodeFromUnicode(wchar_t Unicode) const override;
59 
60   uint16_t CIDFromCharCode(uint32_t charcode) const;
61   const uint8_t* GetCIDTransform(uint16_t CID) const;
62   short GetVertWidth(uint16_t CID) const;
63   void GetVertOrigin(uint16_t CID, short& vx, short& vy) const;
64   int GetCharSize(uint32_t charcode) const;
65 
66  protected:
67   void LoadGB2312();
68   int GetGlyphIndex(uint32_t unicodeb, bool* pVertGlyph);
69   int GetVerticalGlyph(int index, bool* pVertGlyph);
70   void LoadMetricsArray(CPDF_Array* pArray,
71                         std::vector<uint32_t>* result,
72                         int nElements);
73   void LoadSubstFont();
74   wchar_t GetUnicodeFromCharCode(uint32_t charcode) const;
75 
76   RetainPtr<CPDF_CMap> m_pCMap;
77   UnownedPtr<CPDF_CID2UnicodeMap> m_pCID2UnicodeMap;
78   CIDSet m_Charset;
79   bool m_bType1;
80   bool m_bCIDIsGID;
81   uint16_t m_DefaultWidth;
82   RetainPtr<CPDF_StreamAcc> m_pStreamAcc;
83   bool m_bAnsiWidthsFixed;
84   FX_RECT m_CharBBox[256];
85   std::vector<uint32_t> m_WidthList;
86   short m_DefaultVY;
87   short m_DefaultW1;
88   std::vector<uint32_t> m_VertMetrics;
89   bool m_bAdobeCourierStd;
90   std::unique_ptr<CFX_CTTGSUBTable> m_pTTGSUBTable;
91 };
92 
93 #endif  // CORE_FPDFAPI_FONT_CPDF_CIDFONT_H_
94