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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_FPDF_FONT_TTGSUBTABLE_H_
#define CORE_FPDFAPI_FPDF_FONT_TTGSUBTABLE_H_
#include <stdint.h>
#include <map>
#include "core/fxcrt/include/fx_basic.h"
#include "core/include/fxge/fx_font.h"
#include "core/include/fxge/fx_freetype.h"
class CFX_GlyphMap {
public:
CFX_GlyphMap();
~CFX_GlyphMap();
void SetAt(int key, int value);
FX_BOOL Lookup(int key, int& value);
protected:
CFX_BinaryBuf m_Buffer;
};
class CFX_CTTGSUBTable {
public:
CFX_CTTGSUBTable(void) : m_bFeautureMapLoad(FALSE), loaded(false) {}
CFX_CTTGSUBTable(FT_Bytes gsub) : m_bFeautureMapLoad(FALSE), loaded(false) {
LoadGSUBTable(gsub);
}
virtual ~CFX_CTTGSUBTable() {}
bool IsOk(void) const { return loaded; }
bool LoadGSUBTable(FT_Bytes gsub);
bool GetVerticalGlyph(uint32_t glyphnum, uint32_t* vglyphnum);
private:
struct tt_gsub_header {
uint32_t Version;
uint16_t ScriptList;
uint16_t FeatureList;
uint16_t LookupList;
};
struct TLangSys {
uint16_t LookupOrder;
uint16_t ReqFeatureIndex;
uint16_t FeatureCount;
uint16_t* FeatureIndex;
TLangSys()
: LookupOrder(0),
ReqFeatureIndex(0),
FeatureCount(0),
FeatureIndex(NULL) {}
~TLangSys() { delete[] FeatureIndex; }
private:
TLangSys(const TLangSys&);
TLangSys& operator=(const TLangSys&);
};
struct TLangSysRecord {
uint32_t LangSysTag;
struct TLangSys LangSys;
TLangSysRecord() : LangSysTag(0) {}
private:
TLangSysRecord(const TLangSysRecord&);
TLangSysRecord& operator=(const TLangSysRecord&);
};
struct TScript {
uint16_t DefaultLangSys;
uint16_t LangSysCount;
struct TLangSysRecord* LangSysRecord;
TScript() : DefaultLangSys(0), LangSysCount(0), LangSysRecord(NULL) {}
~TScript() { delete[] LangSysRecord; }
private:
TScript(const TScript&);
TScript& operator=(const TScript&);
};
struct TScriptRecord {
uint32_t ScriptTag;
struct TScript Script;
TScriptRecord() : ScriptTag(0) {}
private:
TScriptRecord(const TScriptRecord&);
TScriptRecord& operator=(const TScriptRecord&);
};
struct TScriptList {
uint16_t ScriptCount;
struct TScriptRecord* ScriptRecord;
TScriptList() : ScriptCount(0), ScriptRecord(NULL) {}
~TScriptList() { delete[] ScriptRecord; }
private:
TScriptList(const TScriptList&);
TScriptList& operator=(const TScriptList&);
};
struct TFeature {
uint16_t FeatureParams;
int LookupCount;
uint16_t* LookupListIndex;
TFeature() : FeatureParams(0), LookupCount(0), LookupListIndex(NULL) {}
~TFeature() { delete[] LookupListIndex; }
private:
TFeature(const TFeature&);
TFeature& operator=(const TFeature&);
};
struct TFeatureRecord {
uint32_t FeatureTag;
struct TFeature Feature;
TFeatureRecord() : FeatureTag(0) {}
private:
TFeatureRecord(const TFeatureRecord&);
TFeatureRecord& operator=(const TFeatureRecord&);
};
struct TFeatureList {
int FeatureCount;
struct TFeatureRecord* FeatureRecord;
TFeatureList() : FeatureCount(0), FeatureRecord(NULL) {}
~TFeatureList() { delete[] FeatureRecord; }
private:
TFeatureList(const TFeatureList&);
TFeatureList& operator=(const TFeatureList&);
};
enum TLookupFlag {
LOOKUPFLAG_RightToLeft = 0x0001,
LOOKUPFLAG_IgnoreBaseGlyphs = 0x0002,
LOOKUPFLAG_IgnoreLigatures = 0x0004,
LOOKUPFLAG_IgnoreMarks = 0x0008,
LOOKUPFLAG_Reserved = 0x00F0,
LOOKUPFLAG_MarkAttachmentType = 0xFF00,
};
struct TCoverageFormatBase {
uint16_t CoverageFormat;
CFX_GlyphMap m_glyphMap;
TCoverageFormatBase() : CoverageFormat(0) {}
virtual ~TCoverageFormatBase() {}
private:
TCoverageFormatBase(const TCoverageFormatBase&);
TCoverageFormatBase& operator=(const TCoverageFormatBase&);
};
struct TCoverageFormat1 : public TCoverageFormatBase {
uint16_t GlyphCount;
uint16_t* GlyphArray;
TCoverageFormat1() : GlyphCount(0), GlyphArray(NULL) { CoverageFormat = 1; }
~TCoverageFormat1() override { delete[] GlyphArray; }
private:
TCoverageFormat1(const TCoverageFormat1&);
TCoverageFormat1& operator=(const TCoverageFormat1&);
};
struct TRangeRecord {
uint16_t Start;
uint16_t End;
uint16_t StartCoverageIndex;
TRangeRecord() : Start(0), End(0), StartCoverageIndex(0) {}
friend bool operator>(const TRangeRecord& r1, const TRangeRecord& r2) {
return r1.Start > r2.Start;
}
private:
TRangeRecord(const TRangeRecord&);
};
struct TCoverageFormat2 : public TCoverageFormatBase {
uint16_t RangeCount;
struct TRangeRecord* RangeRecord;
TCoverageFormat2() : RangeCount(0), RangeRecord(NULL) {
CoverageFormat = 2;
}
~TCoverageFormat2() override { delete[] RangeRecord; }
private:
TCoverageFormat2(const TCoverageFormat2&);
TCoverageFormat2& operator=(const TCoverageFormat2&);
};
struct TClassDefFormatBase {
uint16_t ClassFormat;
TClassDefFormatBase() : ClassFormat(0) {}
virtual ~TClassDefFormatBase() {}
private:
TClassDefFormatBase(const TClassDefFormatBase&);
TClassDefFormatBase& operator=(const TClassDefFormatBase&);
};
struct TClassDefFormat1 : public TClassDefFormatBase {
uint16_t StartGlyph;
uint16_t GlyphCount;
uint16_t* ClassValueArray;
TClassDefFormat1() : StartGlyph(0), GlyphCount(0), ClassValueArray(NULL) {
ClassFormat = 1;
}
~TClassDefFormat1() override { delete[] ClassValueArray; }
private:
TClassDefFormat1(const TClassDefFormat1&);
TClassDefFormat1& operator=(const TClassDefFormat1&);
};
struct TClassRangeRecord {
uint16_t Start;
uint16_t End;
uint16_t Class;
TClassRangeRecord() : Start(0), End(0), Class(0) {}
private:
TClassRangeRecord(const TClassRangeRecord&);
TClassRangeRecord& operator=(const TClassRangeRecord&);
};
struct TClassDefFormat2 : public TClassDefFormatBase {
uint16_t ClassRangeCount;
struct TClassRangeRecord* ClassRangeRecord;
TClassDefFormat2() : ClassRangeCount(0), ClassRangeRecord(NULL) {
ClassFormat = 2;
}
~TClassDefFormat2() override { delete[] ClassRangeRecord; }
private:
TClassDefFormat2(const TClassDefFormat2&);
TClassDefFormat2& operator=(const TClassDefFormat2&);
};
struct TDevice {
uint16_t StartSize;
uint16_t EndSize;
uint16_t DeltaFormat;
TDevice() : StartSize(0), EndSize(0), DeltaFormat(0) {}
private:
TDevice(const TDevice&);
TDevice& operator=(const TDevice&);
};
struct TSubTableBase {
uint16_t SubstFormat;
TSubTableBase() : SubstFormat(0) {}
virtual ~TSubTableBase() {}
private:
TSubTableBase(const TSubTableBase&);
TSubTableBase& operator=(const TSubTableBase&);
};
struct TSingleSubstFormat1 : public TSubTableBase {
TCoverageFormatBase* Coverage;
int16_t DeltaGlyphID;
TSingleSubstFormat1() : Coverage(NULL), DeltaGlyphID(0) { SubstFormat = 1; }
~TSingleSubstFormat1() override { delete Coverage; }
private:
TSingleSubstFormat1(const TSingleSubstFormat1&);
TSingleSubstFormat1& operator=(const TSingleSubstFormat1&);
};
struct TSingleSubstFormat2 : public TSubTableBase {
TCoverageFormatBase* Coverage;
uint16_t GlyphCount;
uint16_t* Substitute;
TSingleSubstFormat2() : Coverage(NULL), GlyphCount(0), Substitute(NULL) {
SubstFormat = 2;
}
~TSingleSubstFormat2() override {
delete Coverage;
delete[] Substitute;
}
private:
TSingleSubstFormat2(const TSingleSubstFormat2&);
TSingleSubstFormat2& operator=(const TSingleSubstFormat2&);
};
struct TLookup {
uint16_t LookupType;
uint16_t LookupFlag;
uint16_t SubTableCount;
struct TSubTableBase** SubTable;
TLookup()
: LookupType(0), LookupFlag(0), SubTableCount(0), SubTable(NULL) {}
~TLookup() {
if (SubTable) {
for (int i = 0; i < SubTableCount; ++i)
delete SubTable[i];
delete[] SubTable;
}
}
private:
TLookup(const TLookup&);
TLookup& operator=(const TLookup&);
};
struct TLookupList {
int LookupCount;
struct TLookup* Lookup;
TLookupList() : LookupCount(0), Lookup(NULL) {}
~TLookupList() { delete[] Lookup; }
private:
TLookupList(const TLookupList&);
TLookupList& operator=(const TLookupList&);
};
bool Parse(FT_Bytes scriptlist, FT_Bytes featurelist, FT_Bytes lookuplist);
void ParseScriptList(FT_Bytes raw, TScriptList* rec);
void ParseScript(FT_Bytes raw, TScript* rec);
void ParseLangSys(FT_Bytes raw, TLangSys* rec);
void ParseFeatureList(FT_Bytes raw, TFeatureList* rec);
void ParseFeature(FT_Bytes raw, TFeature* rec);
void ParseLookupList(FT_Bytes raw, TLookupList* rec);
void ParseLookup(FT_Bytes raw, TLookup* rec);
void ParseCoverage(FT_Bytes raw, TCoverageFormatBase** rec);
void ParseCoverageFormat1(FT_Bytes raw, TCoverageFormat1* rec);
void ParseCoverageFormat2(FT_Bytes raw, TCoverageFormat2* rec);
void ParseSingleSubst(FT_Bytes raw, TSubTableBase** rec);
void ParseSingleSubstFormat1(FT_Bytes raw, TSingleSubstFormat1* rec);
void ParseSingleSubstFormat2(FT_Bytes raw, TSingleSubstFormat2* rec);
bool GetVerticalGlyphSub(uint32_t glyphnum,
uint32_t* vglyphnum,
struct TFeature* Feature);
bool GetVerticalGlyphSub2(uint32_t glyphnum,
uint32_t* vglyphnum,
struct TLookup* Lookup);
int GetCoverageIndex(struct TCoverageFormatBase* Coverage, uint32_t g);
uint8_t GetUInt8(FT_Bytes& p) const {
uint8_t ret = p[0];
p += 1;
return ret;
}
int16_t GetInt16(FT_Bytes& p) const {
uint16_t ret = p[0] << 8 | p[1];
p += 2;
return *(int16_t*)&ret;
}
uint16_t GetUInt16(FT_Bytes& p) const {
uint16_t ret = p[0] << 8 | p[1];
p += 2;
return ret;
}
int32_t GetInt32(FT_Bytes& p) const {
uint32_t ret = p[0] << 24 | p[1] << 16 | p[2] << 8 | p[3];
p += 4;
return *(int32_t*)&ret;
}
uint32_t GetUInt32(FT_Bytes& p) const {
uint32_t ret = p[0] << 24 | p[1] << 16 | p[2] << 8 | p[3];
p += 4;
return ret;
}
std::map<uint32_t, uint32_t> m_featureMap;
FX_BOOL m_bFeautureMapLoad;
bool loaded;
struct tt_gsub_header header;
struct TScriptList ScriptList;
struct TFeatureList FeatureList;
struct TLookupList LookupList;
};
class CFX_GSUBTable final : public IFX_GSUBTable {
public:
~CFX_GSUBTable() override {}
FX_BOOL GetVerticalGlyph(uint32_t glyphnum, uint32_t* vglyphnum) override;
CFX_CTTGSUBTable m_GsubImp;
};
#endif // CORE_FPDFAPI_FPDF_FONT_TTGSUBTABLE_H_
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