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// Copyright (c) 2009-2017 The OTS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef OTS_SILF_H_
#define OTS_SILF_H_
#include <vector>
#include "ots.h"
#include "graphite.h"
namespace ots {
class OpenTypeSILF : public Table {
public:
explicit OpenTypeSILF(Font* font, uint32_t tag)
: Table(font, tag, tag) { }
bool Parse(const uint8_t* data, size_t length) {
return this->Parse(data, length, false);
}
bool Serialize(OTSStream* out);
private:
bool Parse(const uint8_t* data, size_t length, bool prevent_decompression);
struct SILSub : public TablePart<OpenTypeSILF> {
explicit SILSub(OpenTypeSILF* parent)
: TablePart<OpenTypeSILF>(parent), classes(parent) { }
bool ParsePart(Buffer& table);
bool SerializePart(OTSStream* out) const;
struct JustificationLevel : public TablePart<OpenTypeSILF> {
explicit JustificationLevel(OpenTypeSILF* parent)
: TablePart<OpenTypeSILF>(parent) { }
bool ParsePart(Buffer& table);
bool SerializePart(OTSStream* out) const;
uint8_t attrStretch;
uint8_t attrShrink;
uint8_t attrStep;
uint8_t attrWeight;
uint8_t runto;
uint8_t reserved;
uint8_t reserved2;
uint8_t reserved3;
};
struct PseudoMap : public TablePart<OpenTypeSILF> {
explicit PseudoMap(OpenTypeSILF* parent)
: TablePart<OpenTypeSILF>(parent) { }
bool ParsePart(Buffer& table);
bool SerializePart(OTSStream* out) const;
uint32_t unicode;
uint16_t nPseudo;
};
struct ClassMap : public TablePart<OpenTypeSILF> {
explicit ClassMap(OpenTypeSILF* parent)
: TablePart<OpenTypeSILF>(parent) { }
bool ParsePart(Buffer& table);
bool SerializePart(OTSStream* out) const;
struct LookupClass : public TablePart<OpenTypeSILF> {
explicit LookupClass(OpenTypeSILF* parent)
: TablePart<OpenTypeSILF>(parent) { }
bool ParsePart(Buffer& table);
bool SerializePart(OTSStream* out) const;
struct LookupPair : public TablePart<OpenTypeSILF> {
explicit LookupPair(OpenTypeSILF* parent)
: TablePart<OpenTypeSILF>(parent) { }
bool ParsePart(Buffer& table);
bool SerializePart(OTSStream* out) const;
uint16_t glyphId;
uint16_t index;
};
uint16_t numIDs;
uint16_t searchRange;
uint16_t entrySelector;
uint16_t rangeShift;
std::vector<LookupPair> lookups;
};
uint16_t numClass;
uint16_t numLinear;
std::vector<uint32_t> oClass; // uint16_t before v4
std::vector<uint16_t> glyphs;
std::vector<LookupClass> lookups;
};
struct SILPass : public TablePart<OpenTypeSILF> {
explicit SILPass(OpenTypeSILF* parent)
: TablePart<OpenTypeSILF>(parent) { }
bool ParsePart(Buffer& table) { return false; }
bool ParsePart(Buffer& table, const size_t SILSub_init_offset,
const size_t next_pass_offset);
bool SerializePart(OTSStream* out) const;
struct PassRange : public TablePart<OpenTypeSILF> {
explicit PassRange(OpenTypeSILF* parent)
: TablePart<OpenTypeSILF>(parent) { }
bool ParsePart(Buffer& table);
bool SerializePart(OTSStream* out) const;
uint16_t firstId;
uint16_t lastId;
uint16_t colId;
};
uint8_t flags;
uint8_t maxRuleLoop;
uint8_t maxRuleContext;
uint8_t maxBackup;
uint16_t numRules;
uint16_t fsmOffset;
uint32_t pcCode;
uint32_t rcCode;
uint32_t aCode;
uint32_t oDebug;
uint16_t numRows;
uint16_t numTransitional;
uint16_t numSuccess;
uint16_t numColumns;
uint16_t numRange;
uint16_t searchRange;
uint16_t entrySelector;
uint16_t rangeShift;
std::vector<PassRange> ranges;
std::vector<uint16_t> oRuleMap;
std::vector<uint16_t> ruleMap;
uint8_t minRulePreContext;
uint8_t maxRulePreContext;
std::vector<int16_t> startStates;
std::vector<uint16_t> ruleSortKeys;
std::vector<uint8_t> rulePreContext;
uint8_t collisionThreshold; // reserved before v5
uint16_t pConstraint;
std::vector<uint16_t> oConstraints;
std::vector<uint16_t> oActions;
std::vector<std::vector<uint16_t>> stateTrans;
uint8_t reserved2;
std::vector<uint8_t> passConstraints;
std::vector<uint8_t> ruleConstraints;
std::vector<uint8_t> actions;
std::vector<uint16_t> dActions;
std::vector<uint16_t> dStates;
std::vector<uint16_t> dCols;
};
uint32_t ruleVersion;
uint16_t passOffset;
uint16_t pseudosOffset;
uint16_t maxGlyphID;
int16_t extraAscent;
int16_t extraDescent;
uint8_t numPasses;
uint8_t iSubst;
uint8_t iPos;
uint8_t iJust;
uint8_t iBidi;
uint8_t flags;
uint8_t maxPreContext;
uint8_t maxPostContext;
uint8_t attrPseudo;
uint8_t attrBreakWeight;
uint8_t attrDirectionality;
uint8_t attrMirroring; // reserved before v4
uint8_t attrSkipPasses; // reserved2 before v4
uint8_t numJLevels;
std::vector<JustificationLevel> jLevels;
uint16_t numLigComp;
uint8_t numUserDefn;
uint8_t maxCompPerLig;
uint8_t direction;
uint8_t attCollisions; // reserved3 before v5
uint8_t reserved4;
uint8_t reserved5;
uint8_t reserved6;
uint8_t numCritFeatures;
std::vector<uint16_t> critFeatures;
uint8_t reserved7;
uint8_t numScriptTag;
std::vector<uint32_t> scriptTag;
uint16_t lbGID;
std::vector<uint32_t> oPasses;
uint16_t numPseudo;
uint16_t searchPseudo;
uint16_t pseudoSelector;
uint16_t pseudoShift;
std::vector<PseudoMap> pMaps;
ClassMap classes;
std::vector<SILPass> passes;
};
uint32_t version;
uint32_t compHead; // compression header
static const uint32_t SCHEME = 0xF8000000;
static const uint32_t FULL_SIZE = 0x07FFFFFF;
static const uint32_t COMPILER_VERSION = 0x07FFFFFF;
uint16_t numSub;
uint16_t reserved;
std::vector<uint32_t> offset;
std::vector<SILSub> tables;
};
} // namespace ots
#endif // OTS_SILF_H_
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