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Diffstat (limited to 'core/fxge/fx_font.h')
| -rw-r--r-- | core/fxge/fx_font.h | 248 |
1 files changed, 248 insertions, 0 deletions
diff --git a/core/fxge/fx_font.h b/core/fxge/fx_font.h new file mode 100644 index 0000000000..8dda12af50 --- /dev/null +++ b/core/fxge/fx_font.h @@ -0,0 +1,248 @@ +// 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 <vector> + +#include "core/fxcrt/fx_system.h" +#include "core/fxge/cfx_substfont.h" +#include "core/fxge/fx_dib.h" +#include "core/fxge/fx_freetype.h" + +typedef struct FT_FaceRec_* FXFT_Face; +typedef void* FXFT_Library; + +class CFX_FaceCache; +class CFX_GlyphBitmap; +class CFX_PathData; +class CFX_SizeGlyphCache; + +#ifdef _SKIA_SUPPORT_ +class SkTypeface; + +using CFX_TypeFace = SkTypeface; +#endif + +/* Character sets for the font */ +#define FXFONT_ANSI_CHARSET 0 +#define FXFONT_DEFAULT_CHARSET 1 +#define FXFONT_SYMBOL_CHARSET 2 +#define FXFONT_SHIFTJIS_CHARSET 128 +#define FXFONT_HANGUL_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_JOHAB_CHARSET 130 +#define FXFONT_VIETNAMESE_CHARSET 163 + +/* 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 */ +#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 +#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 CFX_ByteString& face_name, + FX_BOOL bTrueType, + uint32_t flags, + int weight, + int italic_angle, + int CharsetCP, + bool bVertical); + + FX_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 + FX_BOOL LoadFile(IFX_FileRead* pFile, + int nFaceIndex = 0, + int* pFaceCount = nullptr); + + FX_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, + FX_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; + +#ifdef _SKIA_SUPPORT_ + CFX_TypeFace* GetDeviceCache() const; +#endif + + int GetGlyphWidth(uint32_t glyph_index); + int GetAscent() const; + int GetDescent() const; + FX_BOOL GetGlyphBBox(uint32_t glyph_index, FX_RECT& bbox); + bool IsItalic() const; + bool IsBold() const; + bool IsFixedWidth() const; + bool IsVertical() const { return m_bVertical; } + CFX_ByteString GetPsName() const; + CFX_ByteString GetFamilyName() const; + CFX_ByteString GetFaceName() const; + 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; } +#if _FXM_PLATFORM_ == _FXM_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: + CFX_BinaryBuf m_OtfFontData; + 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 = 0) const; + + private: + CFX_FaceCache* GetFaceCache() const; + + void ReleasePlatformResource(); + void DeleteFace(); + + void ClearFaceCache(); + + FXFT_Face m_Face; + mutable CFX_FaceCache* m_FaceCache; // not owned. + 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 _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_ + void* m_pPlatformFont; +#endif + bool m_bEmbedded; + bool m_bVertical; +}; + +class CFX_FontFaceInfo { + public: + CFX_FontFaceInfo(CFX_ByteString filePath, + CFX_ByteString faceName, + CFX_ByteString fontTables, + uint32_t fontOffset, + uint32_t fileSize); + + const CFX_ByteString m_FilePath; + const CFX_ByteString m_FaceName; + const CFX_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: + int m_Top; + int m_Left; + CFX_DIBitmap m_Bitmap; +}; + +struct FXTEXT_GLYPHPOS { + const CFX_GlyphBitmap* m_pGlyph; + int m_OriginX; + int m_OriginY; + FX_FLOAT m_fOriginX; + FX_FLOAT m_fOriginY; +}; + +FX_RECT FXGE_GetGlyphsBBox(const std::vector<FXTEXT_GLYPHPOS>& glyphs, + int anti_alias, + FX_FLOAT retinaScaleX = 1.0f, + FX_FLOAT retinaScaleY = 1.0f); + +CFX_ByteString GetNameFromTT(const uint8_t* name_table, + uint32_t name_table_size, + uint32_t name); + +int PDF_GetStandardFontName(CFX_ByteString* name); + +#endif // CORE_FXGE_FX_FONT_H_ |