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// 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_FPDFAPI_FONT_CFX_CTTGSUBTABLE_H_
#define CORE_FPDFAPI_FONT_CFX_CTTGSUBTABLE_H_
#include <stdint.h>
#include <memory>
#include <set>
#include <vector>
#include "core/fxge/fx_freetype.h"
class CFX_CTTGSUBTable {
public:
explicit CFX_CTTGSUBTable(FT_Bytes gsub);
~CFX_CTTGSUBTable();
uint32_t GetVerticalGlyph(uint32_t glyphnum) const;
private:
struct TLangSysRecord {
TLangSysRecord();
~TLangSysRecord();
uint32_t LangSysTag;
uint16_t LookupOrder;
uint16_t ReqFeatureIndex;
std::vector<uint16_t> FeatureIndices;
};
struct TScriptRecord {
TScriptRecord();
~TScriptRecord();
uint32_t ScriptTag;
uint16_t DefaultLangSys;
std::vector<TLangSysRecord> LangSysRecords;
};
struct TFeatureRecord {
TFeatureRecord();
~TFeatureRecord();
uint32_t FeatureTag;
uint16_t FeatureParams;
std::vector<uint16_t> LookupListIndices;
};
struct TRangeRecord {
TRangeRecord();
uint16_t Start;
uint16_t End;
uint16_t StartCoverageIndex;
};
struct TCoverageFormatBase {
virtual ~TCoverageFormatBase() {}
uint16_t CoverageFormat;
};
struct TCoverageFormat1 final : public TCoverageFormatBase {
TCoverageFormat1();
~TCoverageFormat1() override;
std::vector<uint16_t> GlyphArray;
};
struct TCoverageFormat2 final : public TCoverageFormatBase {
TCoverageFormat2();
~TCoverageFormat2() override;
std::vector<TRangeRecord> RangeRecords;
};
struct TDevice {
TDevice() : StartSize(0), EndSize(0), DeltaFormat(0) {}
uint16_t StartSize;
uint16_t EndSize;
uint16_t DeltaFormat;
};
struct TSubTableBase {
TSubTableBase();
virtual ~TSubTableBase();
std::unique_ptr<TCoverageFormatBase> Coverage;
uint16_t SubstFormat;
};
struct TSubTable1 final : public TSubTableBase {
TSubTable1();
~TSubTable1() override;
int16_t DeltaGlyphID;
};
struct TSubTable2 final : public TSubTableBase {
TSubTable2();
~TSubTable2() override;
std::vector<uint16_t> Substitutes;
};
struct TLookup {
TLookup();
~TLookup();
uint16_t LookupType;
uint16_t LookupFlag;
std::vector<std::unique_ptr<TSubTableBase>> SubTables;
};
bool LoadGSUBTable(FT_Bytes gsub);
bool Parse(FT_Bytes scriptlist, FT_Bytes featurelist, FT_Bytes lookuplist);
void ParseScriptList(FT_Bytes raw);
void ParseScript(FT_Bytes raw, TScriptRecord* rec);
void ParseLangSys(FT_Bytes raw, TLangSysRecord* rec);
void ParseFeatureList(FT_Bytes raw);
void ParseFeature(FT_Bytes raw, TFeatureRecord* rec);
void ParseLookupList(FT_Bytes raw);
void ParseLookup(FT_Bytes raw, TLookup* rec);
std::unique_ptr<TCoverageFormatBase> ParseCoverage(FT_Bytes raw);
void ParseCoverageFormat1(FT_Bytes raw, TCoverageFormat1* rec);
void ParseCoverageFormat2(FT_Bytes raw, TCoverageFormat2* rec);
void ParseSingleSubst(FT_Bytes raw, std::unique_ptr<TSubTableBase>* rec);
void ParseSingleSubstFormat1(FT_Bytes raw, TSubTable1* rec);
void ParseSingleSubstFormat2(FT_Bytes raw, TSubTable2* rec);
bool GetVerticalGlyphSub(const TFeatureRecord& feature,
uint32_t glyphnum,
uint32_t* vglyphnum) const;
bool GetVerticalGlyphSub2(const TLookup& lookup,
uint32_t glyphnum,
uint32_t* vglyphnum) const;
int GetCoverageIndex(TCoverageFormatBase* Coverage, uint32_t g) const;
uint8_t GetUInt8(FT_Bytes& p) const;
int16_t GetInt16(FT_Bytes& p) const;
uint16_t GetUInt16(FT_Bytes& p) const;
int32_t GetInt32(FT_Bytes& p) const;
uint32_t GetUInt32(FT_Bytes& p) const;
std::set<uint32_t> m_featureSet;
std::vector<TScriptRecord> ScriptList;
std::vector<TFeatureRecord> FeatureList;
std::vector<TLookup> LookupList;
};
#endif // CORE_FPDFAPI_FONT_CFX_CTTGSUBTABLE_H_
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