summaryrefslogtreecommitdiff
path: root/core/fxge/fx_font.h
blob: 598402a7f5f9e3964aa7cbdb6fdfd86a770be307 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
// 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_FXGE_FX_FONT_H_
#define CORE_FXGE_FX_FONT_H_

#include <memory>
#include <utility>
#include <vector>

#include "core/fxcrt/fx_system.h"
#include "core/fxcrt/unowned_ptr.h"
#include "core/fxge/cfx_substfont.h"
#include "core/fxge/dib/cfx_dibitmap.h"
#include "core/fxge/fx_dib.h"
#include "core/fxge/fx_freetype.h"

class CFX_FaceCache;
class CFX_GlyphBitmap;
class CFX_PathData;
class IFX_SeekableReadStream;

#if defined _SKIA_SUPPORT_ || defined _SKIA_SUPPORT_PATHS_
class SkTypeface;

using CFX_TypeFace = SkTypeface;
#endif

/* Font pitch and family flags */
#define FXFONT_FF_FIXEDPITCH 1
#define FXFONT_FF_ROMAN (1 << 4)
#define FXFONT_FF_SCRIPT (4 << 4)

/* Typical weight values */
#define FXFONT_FW_NORMAL 400
#define FXFONT_FW_BOLD 700

/* Font styles as defined in PDF 1.7 Table 5.20 */
#define FXFONT_FIXED_PITCH (1 << 0)
#define FXFONT_SERIF (1 << 1)
#define FXFONT_SYMBOLIC (1 << 2)
#define FXFONT_SCRIPT (1 << 3)
#define FXFONT_NONSYMBOLIC (1 << 5)
#define FXFONT_ITALIC (1 << 6)
#define FXFONT_ALLCAP (1 << 16)
#define FXFONT_SMALLCAP (1 << 17)
#define FXFONT_BOLD (1 << 18)

/* Other font flags */
#define FXFONT_USEEXTERNATTR 0x80000
#define FXFONT_CIDFONT 0x100000
#ifdef PDF_ENABLE_XFA
#define FXFONT_EXACTMATCH 0x80000000
#endif  // PDF_ENABLE_XFA

#define CHARSET_FLAG_ANSI 1
#define CHARSET_FLAG_SYMBOL 2
#define CHARSET_FLAG_SHIFTJIS 4
#define CHARSET_FLAG_BIG5 8
#define CHARSET_FLAG_GB 16
#define CHARSET_FLAG_KOREAN 32

#define GET_TT_SHORT(w) (uint16_t)(((w)[0] << 8) | (w)[1])
#define GET_TT_LONG(w) \
  (uint32_t)(((w)[0] << 24) | ((w)[1] << 16) | ((w)[2] << 8) | (w)[3])

// Sets the given transform on the font, and resets it to the identity when it
// goes out of scope.
class ScopedFontTransform {
 public:
  ScopedFontTransform(FT_Face face, FXFT_Matrix* matrix);
  ~ScopedFontTransform();

 private:
  FT_Face m_Face;
};

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

  void LoadSubst(const ByteString& face_name,
                 bool bTrueType,
                 uint32_t flags,
                 int weight,
                 int italic_angle,
                 int CharsetCP,
                 bool bVertical);

  bool LoadEmbedded(const uint8_t* data, uint32_t size);
  FXFT_Face GetFace() const { return m_Face; }
  CFX_SubstFont* GetSubstFont() const { return m_pSubstFont.get(); }

#ifdef PDF_ENABLE_XFA
  bool LoadFile(const RetainPtr<IFX_SeekableReadStream>& pFile, int nFaceIndex);

  bool LoadClone(const CFX_Font* pFont);
  void SetFace(FXFT_Face face);
  void SetSubstFont(std::unique_ptr<CFX_SubstFont> subst) {
    m_pSubstFont = std::move(subst);
  }
#endif  // PDF_ENABLE_XFA

  const CFX_GlyphBitmap* LoadGlyphBitmap(uint32_t glyph_index,
                                         bool bFontStyle,
                                         const CFX_Matrix* pMatrix,
                                         int dest_width,
                                         int anti_alias,
                                         int& text_flags) const;
  const CFX_PathData* LoadGlyphPath(uint32_t glyph_index, int dest_width) const;

#if defined _SKIA_SUPPORT_ || defined _SKIA_SUPPORT_PATHS_
  CFX_TypeFace* GetDeviceCache() const;
#endif

  int GetGlyphWidth(uint32_t glyph_index);
  int GetAscent() const;
  int GetDescent() const;
  bool GetGlyphBBox(uint32_t glyph_index, FX_RECT& bbox);
  bool IsItalic() const;
  bool IsBold() const;
  bool IsFixedWidth() const;
  bool IsVertical() const { return m_bVertical; }
  ByteString GetPsName() const;
  ByteString GetFamilyName() const;
  ByteString GetFaceName() const;
  bool IsTTFont() const;
  bool GetBBox(FX_RECT& bbox);
  bool IsEmbedded() const { return m_bEmbedded; }
  uint8_t* GetSubData() const { return m_pGsubData; }
  void SetSubData(uint8_t* data) { m_pGsubData = data; }
#if _FX_PLATFORM_ == _FX_PLATFORM_APPLE_
  void* GetPlatformFont() const { return m_pPlatformFont; }
  void SetPlatformFont(void* font) { m_pPlatformFont = font; }
#endif
  uint8_t* GetFontData() const { return m_pFontData; }
  uint32_t GetSize() const { return m_dwSize; }
  void AdjustMMParams(int glyph_index, int width, int weight) const;

  static const size_t kAngleSkewArraySize = 30;
  static const char s_AngleSkew[kAngleSkewArraySize];
  static const size_t kWeightPowArraySize = 100;
  static const uint8_t s_WeightPow[kWeightPowArraySize];
  static const uint8_t s_WeightPow_11[kWeightPowArraySize];
  static const uint8_t s_WeightPow_SHIFTJIS[kWeightPowArraySize];

#ifdef PDF_ENABLE_XFA
 protected:
  bool m_bShallowCopy;
  FXFT_StreamRec* m_pOwnedStream;
#endif  // PDF_ENABLE_XFA

 private:
  friend class CFX_FaceCache;
  CFX_PathData* LoadGlyphPathImpl(uint32_t glyph_index, int dest_width) const;
  CFX_FaceCache* GetFaceCache() const;
  void ReleasePlatformResource();
  void DeleteFace();
  void ClearFaceCache();

  FXFT_Face m_Face;
  mutable UnownedPtr<CFX_FaceCache> m_FaceCache;
  std::unique_ptr<CFX_SubstFont> m_pSubstFont;
  std::vector<uint8_t> m_pFontDataAllocation;
  uint8_t* m_pFontData;
  uint8_t* m_pGsubData;
  uint32_t m_dwSize;
#if _FX_PLATFORM_ == _FX_PLATFORM_APPLE_
  void* m_pPlatformFont;
#endif
  bool m_bEmbedded;
  bool m_bVertical;
};

class CFX_FontFaceInfo {
 public:
  CFX_FontFaceInfo(ByteString filePath,
                   ByteString faceName,
                   ByteString fontTables,
                   uint32_t fontOffset,
                   uint32_t fileSize);

  const ByteString m_FilePath;
  const ByteString m_FaceName;
  const ByteString m_FontTables;
  const uint32_t m_FontOffset;
  const uint32_t m_FileSize;
  uint32_t m_Styles;
  uint32_t m_Charsets;
};

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

  int m_Top;
  int m_Left;
  RetainPtr<CFX_DIBitmap> m_pBitmap;
};

inline CFX_GlyphBitmap::CFX_GlyphBitmap()
    : m_pBitmap(pdfium::MakeRetain<CFX_DIBitmap>()) {}

inline CFX_GlyphBitmap::~CFX_GlyphBitmap() {}

class FXTEXT_GLYPHPOS {
 public:
  FXTEXT_GLYPHPOS();
  FXTEXT_GLYPHPOS(const FXTEXT_GLYPHPOS&);
  ~FXTEXT_GLYPHPOS();

  const CFX_GlyphBitmap* m_pGlyph;
  CFX_Point m_Origin;
  CFX_PointF m_fOrigin;
};

FX_RECT FXGE_GetGlyphsBBox(const std::vector<FXTEXT_GLYPHPOS>& glyphs,
                           int anti_alias,
                           float retinaScaleX,
                           float retinaScaleY);

ByteString GetNameFromTT(const uint8_t* name_table,
                         uint32_t name_table_size,
                         uint32_t name);

int PDF_GetStandardFontName(ByteString* name);

#endif  // CORE_FXGE_FX_FONT_H_