| // Copyright 2017 The PDFium Authors |
| // 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_CFX_FONT_H_ |
| #define CORE_FXGE_CFX_FONT_H_ |
| |
| #include <stdint.h> |
| |
| #include <memory> |
| |
| #include "build/build_config.h" |
| #include "core/fxcrt/bytestring.h" |
| #include "core/fxcrt/data_vector.h" |
| #include "core/fxcrt/fx_codepage_forward.h" |
| #include "core/fxcrt/fx_coordinates.h" |
| #include "core/fxcrt/retain_ptr.h" |
| #include "core/fxcrt/unowned_ptr_exclusion.h" |
| #include "core/fxge/cfx_face.h" |
| #include "core/fxge/freetype/fx_freetype.h" |
| #include "third_party/abseil-cpp/absl/types/optional.h" |
| #include "third_party/base/span.h" |
| |
| #if defined(_SKIA_SUPPORT_) |
| #include "core/fxge/fx_font.h" |
| #endif |
| |
| class CFX_GlyphBitmap; |
| class CFX_GlyphCache; |
| class CFX_Path; |
| class CFX_SubstFont; |
| class IFX_SeekableReadStream; |
| struct CFX_TextRenderOptions; |
| |
| class CFX_Font { |
| public: |
| // This struct should be the same as FPDF_CharsetFontMap. |
| struct CharsetFontMap { |
| int charset; // Character Set Enum value, see FX_Charset::kXXX. |
| const char* fontname; // Name of default font to use with that charset. |
| }; |
| |
| enum class FontType { |
| kUnknown, |
| kCIDTrueType, |
| }; |
| |
| // Pointer to the default character set to TT Font name map. The map is an |
| // array of CharsetFontMap structs, with its end indicated by a {-1, nullptr} |
| // entry. |
| static const CharsetFontMap kDefaultTTFMap[]; |
| |
| // Used when the font name is empty. |
| static const char kUntitledFontName[]; |
| |
| static const char kDefaultAnsiFontName[]; |
| static const char kUniversalDefaultFontName[]; |
| |
| // Returns negative values on failure. |
| static int GetWeightLevel(FX_Charset charset, size_t index); |
| |
| // |angle| is typically negative. |
| static int GetSkewFromAngle(int angle); |
| |
| static ByteString GetDefaultFontNameByCharset(FX_Charset nCharset); |
| static FX_Charset GetCharSetFromUnicode(uint16_t word); |
| |
| CFX_Font(); |
| ~CFX_Font(); |
| |
| void LoadSubst(const ByteString& face_name, |
| bool bTrueType, |
| uint32_t flags, |
| int weight, |
| int italic_angle, |
| FX_CodePage code_page, |
| bool bVertical); |
| |
| bool LoadEmbedded(pdfium::span<const uint8_t> src_span, |
| bool force_vertical, |
| uint64_t object_tag); |
| RetainPtr<CFX_Face> GetFace() const { return m_Face; } |
| FXFT_FaceRec* GetFaceRec() const { |
| return m_Face ? m_Face->GetRec() : nullptr; |
| } |
| CFX_SubstFont* GetSubstFont() const { return m_pSubstFont.get(); } |
| int GetSubstFontItalicAngle() const; |
| |
| #if defined(PDF_ENABLE_XFA) |
| bool LoadFile(RetainPtr<IFX_SeekableReadStream> pFile, int nFaceIndex); |
| |
| #if !BUILDFLAG(IS_WIN) |
| void SetFace(RetainPtr<CFX_Face> face); |
| void SetFontSpan(pdfium::span<uint8_t> pSpan) { m_FontData = pSpan; } |
| void SetSubstFont(std::unique_ptr<CFX_SubstFont> subst); |
| #endif // !BUILDFLAG(IS_WIN) |
| #endif // defined(PDF_ENABLE_XFA) |
| |
| const CFX_GlyphBitmap* LoadGlyphBitmap( |
| uint32_t glyph_index, |
| bool bFontStyle, |
| const CFX_Matrix& matrix, |
| int dest_width, |
| int anti_alias, |
| CFX_TextRenderOptions* text_options) const; |
| const CFX_Path* LoadGlyphPath(uint32_t glyph_index, int dest_width) const; |
| int GetGlyphWidth(uint32_t glyph_index) const; |
| int GetGlyphWidth(uint32_t glyph_index, int dest_width, int weight) const; |
| int GetAscent() const; |
| int GetDescent() const; |
| absl::optional<FX_RECT> GetGlyphBBox(uint32_t glyph_index); |
| bool IsItalic() const; |
| bool IsBold() const; |
| bool IsFixedWidth() const; |
| bool IsVertical() const { return m_bVertical; } |
| ByteString GetPsName() const; |
| ByteString GetFamilyName() const; |
| ByteString GetFaceName() const; |
| ByteString GetBaseFontName() const; |
| bool IsTTFont() const; |
| |
| // Raw bounding box. |
| absl::optional<FX_RECT> GetRawBBox() const; |
| |
| // Bounding box adjusted for font units. |
| absl::optional<FX_RECT> GetBBox() const; |
| |
| bool IsEmbedded() const { return m_bEmbedded; } |
| FontType GetFontType() const { return m_FontType; } |
| void SetFontType(FontType type) { m_FontType = type; } |
| uint64_t GetObjectTag() const { return m_ObjectTag; } |
| pdfium::span<uint8_t> GetFontSpan() const { return m_FontData; } |
| void AdjustMMParams(int glyph_index, int dest_width, int weight) const; |
| std::unique_ptr<CFX_Path> LoadGlyphPathImpl(uint32_t glyph_index, |
| int dest_width) const; |
| int GetGlyphWidthImpl(uint32_t glyph_index, int dest_width, int weight) const; |
| |
| #if defined(_SKIA_SUPPORT_) |
| CFX_TypeFace* GetDeviceCache() const; |
| bool IsSubstFontBold() const; |
| #endif |
| |
| #if BUILDFLAG(IS_APPLE) |
| void* GetPlatformFont() const { return m_pPlatformFont; } |
| void SetPlatformFont(void* font) { m_pPlatformFont = font; } |
| #endif |
| |
| private: |
| RetainPtr<CFX_GlyphCache> GetOrCreateGlyphCache() const; |
| void ClearGlyphCache(); |
| #if BUILDFLAG(IS_APPLE) |
| void ReleasePlatformResource(); |
| #endif |
| ByteString GetFamilyNameOrUntitled() const; |
| |
| #if defined(PDF_ENABLE_XFA) |
| // |m_pOwnedFile| must outlive |m_pOwnedStreamRec|. |
| RetainPtr<IFX_SeekableReadStream> m_pOwnedFile; |
| std::unique_ptr<FXFT_StreamRec> m_pOwnedStreamRec; // Must outlive |m_Face|. |
| #endif |
| |
| mutable RetainPtr<CFX_Face> m_Face; |
| mutable RetainPtr<CFX_GlyphCache> m_GlyphCache; |
| std::unique_ptr<CFX_SubstFont> m_pSubstFont; |
| DataVector<uint8_t> m_FontDataAllocation; |
| pdfium::span<uint8_t> m_FontData; |
| FontType m_FontType = FontType::kUnknown; |
| uint64_t m_ObjectTag = 0; |
| bool m_bEmbedded = false; |
| bool m_bVertical = false; |
| #if BUILDFLAG(IS_APPLE) |
| UNOWNED_PTR_EXCLUSION void* m_pPlatformFont = nullptr; |
| #endif |
| }; |
| |
| #endif // CORE_FXGE_CFX_FONT_H_ |