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// 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.
#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/fx_memory_wrappers.h"
#include "core/fxcrt/retain_ptr.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"
#include "core/fxge/fx_font.h"
class CFX_GlyphBitmap;
class CFX_GlyphCache;
class CFX_Path;
class CFX_SubstFont;
class IFX_SeekableReadStream;
struct CFX_TextRenderOptions;
class CFX_Font {
// 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 {
// 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);
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);
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; }
void AllocSubData(size_t size);
uint8_t* GetSubData() const { return m_pSubData.get(); }
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;
CFX_TypeFace* GetDeviceCache() const;
bool IsSubstFontBold() const;
void* GetPlatformFont() const { return m_pPlatformFont; }
void SetPlatformFont(void* font) { m_pPlatformFont = font; }
RetainPtr<CFX_GlyphCache> GetOrCreateGlyphCache() const;
void ClearGlyphCache();
void ReleasePlatformResource();
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|.
mutable RetainPtr<CFX_Face> m_Face;
mutable RetainPtr<CFX_GlyphCache> m_GlyphCache;
std::unique_ptr<CFX_SubstFont> m_pSubstFont;
std::unique_ptr<uint8_t, FxFreeDeleter> m_pSubData;
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;
void* m_pPlatformFont = nullptr;