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// Copyright 2019 The PDFium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <stdint.h>
#include <array>
#include <memory>
#include <optional>
#include <vector>
#include "build/build_config.h"
#include "core/fxcrt/bytestring.h"
#include "core/fxcrt/fx_coordinates.h"
#include "core/fxcrt/observed_ptr.h"
#include "core/fxcrt/retain_ptr.h"
#include "core/fxge/freetype/fx_freetype.h"
#include "third_party/base/containers/span.h"
namespace fxge {
enum class FontEncoding : uint32_t;
class CFX_Font;
class CFX_GlyphBitmap;
class CFX_Path;
class CFX_SubstFont;
class CFX_Face final : public Retainable, public Observable {
using CharMap = void*;
struct CharCodeAndIndex {
uint32_t char_code;
uint32_t glyph_index;
static RetainPtr<CFX_Face> New(FT_Library library,
RetainPtr<Retainable> pDesc,
pdfium::span<const FT_Byte> data,
FT_Long face_index);
static RetainPtr<CFX_Face> Open(FT_Library library,
const FT_Open_Args* args,
FT_Long face_index);
bool HasGlyphNames() const;
bool IsTtOt() const;
bool IsTricky() const;
bool IsFixedWidth() const;
#if defined(PDF_ENABLE_XFA)
bool IsScalable() const;
void ClearExternalStream();
bool IsItalic() const;
bool IsBold() const;
ByteString GetFamilyName() const;
ByteString GetStyleName() const;
FX_RECT GetBBox() const;
uint16_t GetUnitsPerEm() const;
int16_t GetAscender() const;
int16_t GetDescender() const;
int16_t GetHeight() const;
pdfium::span<uint8_t> GetData() const;
// Returns the size of the data, or 0 on failure. Only write into `buffer` if
// it is large enough to hold the data.
size_t GetSfntTable(uint32_t table, pdfium::span<uint8_t> buffer);
std::optional<std::array<uint32_t, 4>> GetOs2UnicodeRange();
std::optional<std::array<uint32_t, 2>> GetOs2CodePageRange();
std::optional<std::array<uint8_t, 2>> GetOs2Panose();
int GetGlyphCount() const;
// TODO( Can this method be private?
FX_RECT GetGlyphBBox() const;
std::unique_ptr<CFX_GlyphBitmap> RenderGlyph(const CFX_Font* pFont,
uint32_t glyph_index,
bool bFontStyle,
const CFX_Matrix& matrix,
int dest_width,
int anti_alias);
std::unique_ptr<CFX_Path> LoadGlyphPath(uint32_t glyph_index,
int dest_width,
bool is_vertical,
const CFX_SubstFont* subst_font);
int GetGlyphWidth(uint32_t glyph_index,
int dest_width,
int weight,
const CFX_SubstFont* subst_font);
ByteString GetGlyphName(uint32_t glyph_index);
int GetCharIndex(uint32_t code);
int GetNameIndex(const char* name);
FX_RECT GetCharBBox(uint32_t code, int glyph_index);
std::vector<CharCodeAndIndex> GetCharCodesAndIndices(char32_t max_char);
CharMap GetCurrentCharMap() const;
std::optional<fxge::FontEncoding> GetCurrentCharMapEncoding() const;
int GetCharMapPlatformIdByIndex(size_t index) const;
int GetCharMapEncodingIdByIndex(size_t index) const;
fxge::FontEncoding GetCharMapEncodingByIndex(size_t index) const;
size_t GetCharMapCount() const;
void SetCharMap(CharMap map);
void SetCharMapByIndex(size_t index);
bool SelectCharMap(fxge::FontEncoding encoding);
bool SetPixelSize(uint32_t width, uint32_t height);
bool CanEmbed();
FXFT_FaceRec* GetRec() { return m_pRec.get(); }
const FXFT_FaceRec* GetRec() const { return m_pRec.get(); }
CFX_Face(FXFT_FaceRec* pRec, RetainPtr<Retainable> pDesc);
~CFX_Face() override;
void AdjustVariationParams(int glyph_index, int dest_width, int weight);
ScopedFXFTFaceRec const m_pRec;
RetainPtr<Retainable> const m_pDesc;