1 // Copyright 2014 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_FXGE_FX_FONT_H_ 8 #define CORE_FXGE_FX_FONT_H_ 9 10 #include <memory> 11 #include <utility> 12 #include <vector> 13 14 #include "core/fxcrt/fx_system.h" 15 #include "core/fxge/cfx_substfont.h" 16 #include "core/fxge/fx_dib.h" 17 #include "core/fxge/fx_freetype.h" 18 19 typedef struct FT_FaceRec_* FXFT_Face; 20 typedef void* FXFT_Library; 21 22 class CFX_FaceCache; 23 class CFX_GlyphBitmap; 24 class CFX_PathData; 25 class CFX_SizeGlyphCache; 26 27 #if defined _SKIA_SUPPORT_ || defined _SKIA_SUPPORT_PATHS_ 28 class SkTypeface; 29 30 using CFX_TypeFace = SkTypeface; 31 #endif 32 33 /* Character sets for the font */ 34 #define FXFONT_ANSI_CHARSET 0 35 #define FXFONT_DEFAULT_CHARSET 1 36 #define FXFONT_SYMBOL_CHARSET 2 37 #define FXFONT_SHIFTJIS_CHARSET 128 38 #define FXFONT_HANGUL_CHARSET 129 39 #define FXFONT_GB2312_CHARSET 134 40 #define FXFONT_CHINESEBIG5_CHARSET 136 41 #define FXFONT_THAI_CHARSET 222 42 #define FXFONT_EASTEUROPE_CHARSET 238 43 #define FXFONT_RUSSIAN_CHARSET 204 44 #define FXFONT_GREEK_CHARSET 161 45 #define FXFONT_TURKISH_CHARSET 162 46 #define FXFONT_HEBREW_CHARSET 177 47 #define FXFONT_ARABIC_CHARSET 178 48 #define FXFONT_BALTIC_CHARSET 186 49 #define FXFONT_JOHAB_CHARSET 130 50 #define FXFONT_VIETNAMESE_CHARSET 163 51 52 /* Font pitch and family flags */ 53 #define FXFONT_FF_FIXEDPITCH 1 54 #define FXFONT_FF_ROMAN (1 << 4) 55 #define FXFONT_FF_SCRIPT (4 << 4) 56 57 /* Typical weight values */ 58 #define FXFONT_FW_NORMAL 400 59 #define FXFONT_FW_BOLD 700 60 61 /* Font styles as defined in PDF 1.7 Table 5.20 */ 62 #define FXFONT_FIXED_PITCH (1 << 0) 63 #define FXFONT_SERIF (1 << 1) 64 #define FXFONT_SYMBOLIC (1 << 2) 65 #define FXFONT_SCRIPT (1 << 3) 66 #define FXFONT_NONSYMBOLIC (1 << 5) 67 #define FXFONT_ITALIC (1 << 6) 68 #define FXFONT_ALLCAP (1 << 16) 69 #define FXFONT_SMALLCAP (1 << 17) 70 #define FXFONT_BOLD (1 << 18) 71 72 /* Other font flags */ 73 #define FXFONT_USEEXTERNATTR 0x80000 74 #define FXFONT_CIDFONT 0x100000 75 #ifdef PDF_ENABLE_XFA 76 #define FXFONT_EXACTMATCH 0x80000000 77 #endif // PDF_ENABLE_XFA 78 79 #define CHARSET_FLAG_ANSI 1 80 #define CHARSET_FLAG_SYMBOL 2 81 #define CHARSET_FLAG_SHIFTJIS 4 82 #define CHARSET_FLAG_BIG5 8 83 #define CHARSET_FLAG_GB 16 84 #define CHARSET_FLAG_KOREAN 32 85 86 #define GET_TT_SHORT(w) (uint16_t)(((w)[0] << 8) | (w)[1]) 87 #define GET_TT_LONG(w) \ 88 (uint32_t)(((w)[0] << 24) | ((w)[1] << 16) | ((w)[2] << 8) | (w)[3]) 89 90 // Sets the given transform on the font, and resets it to the identity when it 91 // goes out of scope. 92 class ScopedFontTransform { 93 public: 94 ScopedFontTransform(FT_Face face, FXFT_Matrix* matrix); 95 ~ScopedFontTransform(); 96 97 private: 98 FT_Face m_Face; 99 }; 100 101 class CFX_Font { 102 public: 103 CFX_Font(); 104 ~CFX_Font(); 105 106 void LoadSubst(const CFX_ByteString& face_name, 107 bool bTrueType, 108 uint32_t flags, 109 int weight, 110 int italic_angle, 111 int CharsetCP, 112 bool bVertical); 113 114 bool LoadEmbedded(const uint8_t* data, uint32_t size); 115 FXFT_Face GetFace() const { return m_Face; } 116 CFX_SubstFont* GetSubstFont() const { return m_pSubstFont.get(); } 117 118 #ifdef PDF_ENABLE_XFA 119 bool LoadFile(const CFX_RetainPtr<IFX_SeekableReadStream>& pFile, 120 int nFaceIndex = 0, 121 int* pFaceCount = nullptr); 122 123 bool LoadClone(const CFX_Font* pFont); 124 void SetFace(FXFT_Face face); 125 void SetSubstFont(std::unique_ptr<CFX_SubstFont> subst) { 126 m_pSubstFont = std::move(subst); 127 } 128 #endif // PDF_ENABLE_XFA 129 130 const CFX_GlyphBitmap* LoadGlyphBitmap(uint32_t glyph_index, 131 bool bFontStyle, 132 const CFX_Matrix* pMatrix, 133 int dest_width, 134 int anti_alias, 135 int& text_flags) const; 136 const CFX_PathData* LoadGlyphPath(uint32_t glyph_index, int dest_width) const; 137 138 #if defined _SKIA_SUPPORT_ || defined _SKIA_SUPPORT_PATHS_ 139 CFX_TypeFace* GetDeviceCache() const; 140 #endif 141 142 int GetGlyphWidth(uint32_t glyph_index); 143 int GetAscent() const; 144 int GetDescent() const; 145 bool GetGlyphBBox(uint32_t glyph_index, FX_RECT& bbox); 146 bool IsItalic() const; 147 bool IsBold() const; 148 bool IsFixedWidth() const; 149 bool IsVertical() const { return m_bVertical; } 150 CFX_ByteString GetPsName() const; 151 CFX_ByteString GetFamilyName() const; 152 CFX_ByteString GetFaceName() const; 153 bool IsTTFont() const; 154 bool GetBBox(FX_RECT& bbox); 155 int GetHeight() const; 156 int GetULPos() const; 157 int GetULthickness() const; 158 int GetMaxAdvanceWidth() const; 159 bool IsEmbedded() const { return m_bEmbedded; } 160 uint8_t* GetSubData() const { return m_pGsubData; } 161 void SetSubData(uint8_t* data) { m_pGsubData = data; } 162 #if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_ 163 void* GetPlatformFont() const { return m_pPlatformFont; } 164 void SetPlatformFont(void* font) { m_pPlatformFont = font; } 165 #endif 166 uint8_t* GetFontData() const { return m_pFontData; } 167 uint32_t GetSize() const { return m_dwSize; } 168 void AdjustMMParams(int glyph_index, int width, int weight) const; 169 170 static const size_t kAngleSkewArraySize = 30; 171 static const char s_AngleSkew[kAngleSkewArraySize]; 172 static const size_t kWeightPowArraySize = 100; 173 static const uint8_t s_WeightPow[kWeightPowArraySize]; 174 static const uint8_t s_WeightPow_11[kWeightPowArraySize]; 175 static const uint8_t s_WeightPow_SHIFTJIS[kWeightPowArraySize]; 176 177 #ifdef PDF_ENABLE_XFA 178 protected: 179 bool m_bShallowCopy; 180 FXFT_StreamRec* m_pOwnedStream; 181 #endif // PDF_ENABLE_XFA 182 183 private: 184 friend class CFX_FaceCache; 185 CFX_PathData* LoadGlyphPathImpl(uint32_t glyph_index, 186 int dest_width = 0) const; 187 CFX_FaceCache* GetFaceCache() const; 188 void ReleasePlatformResource(); 189 void DeleteFace(); 190 void ClearFaceCache(); 191 192 FXFT_Face m_Face; 193 mutable CFX_FaceCache* m_FaceCache; // not owned. 194 std::unique_ptr<CFX_SubstFont> m_pSubstFont; 195 std::vector<uint8_t> m_pFontDataAllocation; 196 uint8_t* m_pFontData; 197 uint8_t* m_pGsubData; 198 uint32_t m_dwSize; 199 #if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_ 200 void* m_pPlatformFont; 201 #endif 202 bool m_bEmbedded; 203 bool m_bVertical; 204 }; 205 206 class CFX_FontFaceInfo { 207 public: 208 CFX_FontFaceInfo(CFX_ByteString filePath, 209 CFX_ByteString faceName, 210 CFX_ByteString fontTables, 211 uint32_t fontOffset, 212 uint32_t fileSize); 213 214 const CFX_ByteString m_FilePath; 215 const CFX_ByteString m_FaceName; 216 const CFX_ByteString m_FontTables; 217 const uint32_t m_FontOffset; 218 const uint32_t m_FileSize; 219 uint32_t m_Styles; 220 uint32_t m_Charsets; 221 }; 222 223 class CFX_GlyphBitmap { 224 public: 225 int m_Top; 226 int m_Left; 227 CFX_DIBitmap m_Bitmap; 228 }; 229 230 class FXTEXT_GLYPHPOS { 231 public: 232 FXTEXT_GLYPHPOS(); 233 FXTEXT_GLYPHPOS(const FXTEXT_GLYPHPOS&); 234 ~FXTEXT_GLYPHPOS(); 235 236 const CFX_GlyphBitmap* m_pGlyph; 237 CFX_Point m_Origin; 238 CFX_PointF m_fOrigin; 239 }; 240 241 FX_RECT FXGE_GetGlyphsBBox(const std::vector<FXTEXT_GLYPHPOS>& glyphs, 242 int anti_alias, 243 FX_FLOAT retinaScaleX = 1.0f, 244 FX_FLOAT retinaScaleY = 1.0f); 245 246 CFX_ByteString GetNameFromTT(const uint8_t* name_table, 247 uint32_t name_table_size, 248 uint32_t name); 249 250 int PDF_GetStandardFontName(CFX_ByteString* name); 251 252 #endif // CORE_FXGE_FX_FONT_H_ 253
