Move core/fpdfapi/fpdf_font to core/fpdfapi/font

core/fpdfapi/fpdf_font/ttgsubtable.cpp

-// 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
-
-#include "core/fpdfapi/fpdf_font/ttgsubtable.h"
-
-#include "core/fxge/fx_freetype.h"
-#include "third_party/base/stl_util.h"
-
-CFX_GlyphMap::CFX_GlyphMap() {}
-
-CFX_GlyphMap::~CFX_GlyphMap() {}
-
-extern "C" {
-static int _CompareInt(const void* p1, const void* p2) {
-  return (*(uint32_t*)p1) - (*(uint32_t*)p2);
-}
-};
-
-struct _IntPair {
-  int32_t key;
-  int32_t value;
-};
-
-void CFX_GlyphMap::SetAt(int key, int value) {
-  uint32_t count = m_Buffer.GetSize() / sizeof(_IntPair);
-  _IntPair* buf = (_IntPair*)m_Buffer.GetBuffer();
-  _IntPair pair = {key, value};
-  if (count == 0 || key > buf[count - 1].key) {
-    m_Buffer.AppendBlock(&pair, sizeof(_IntPair));
-    return;
-  }
-  int low = 0, high = count - 1;
-  while (low <= high) {
-    int mid = (low + high) / 2;
-    if (buf[mid].key < key) {
-      low = mid + 1;
-    } else if (buf[mid].key > key) {
-      high = mid - 1;
-    } else {
-      buf[mid].value = value;
-      return;
-    }
-  }
-  m_Buffer.InsertBlock(low * sizeof(_IntPair), &pair, sizeof(_IntPair));
-}
-
-FX_BOOL CFX_GlyphMap::Lookup(int key, int& value) {
-  void* pResult = FXSYS_bsearch(&key, m_Buffer.GetBuffer(),
-                                m_Buffer.GetSize() / sizeof(_IntPair),
-                                sizeof(_IntPair), _CompareInt);
-  if (!pResult) {
-    return FALSE;
-  }
-  value = ((uint32_t*)pResult)[1];
-  return TRUE;
-}
-
-CFX_CTTGSUBTable::CFX_CTTGSUBTable()
-    : m_bFeautureMapLoad(FALSE), loaded(false) {}
-
-CFX_CTTGSUBTable::CFX_CTTGSUBTable(FT_Bytes gsub)
-    : m_bFeautureMapLoad(FALSE), loaded(false) {
-  LoadGSUBTable(gsub);
-}
-
-CFX_CTTGSUBTable::~CFX_CTTGSUBTable() {}
-
-bool CFX_CTTGSUBTable::IsOk() const {
-  return loaded;
-}
-
-bool CFX_CTTGSUBTable::LoadGSUBTable(FT_Bytes gsub) {
-  header.Version = gsub[0] << 24 | gsub[1] << 16 | gsub[2] << 8 | gsub[3];
-  if (header.Version != 0x00010000) {
-    return false;
-  }
-  header.ScriptList = gsub[4] << 8 | gsub[5];
-  header.FeatureList = gsub[6] << 8 | gsub[7];
-  header.LookupList = gsub[8] << 8 | gsub[9];
-  return Parse(&gsub[header.ScriptList], &gsub[header.FeatureList],
-               &gsub[header.LookupList]);
-}
-
-bool CFX_CTTGSUBTable::GetVerticalGlyph(uint32_t glyphnum,
-                                        uint32_t* vglyphnum) {
-  uint32_t tag[] = {
-      (uint8_t)'v' << 24 | (uint8_t)'r' << 16 | (uint8_t)'t' << 8 |
-          (uint8_t)'2',
-      (uint8_t)'v' << 24 | (uint8_t)'e' << 16 | (uint8_t)'r' << 8 |
-          (uint8_t)'t',
-  };
-  if (!m_bFeautureMapLoad) {
-    for (int i = 0; i < ScriptList.ScriptCount; i++) {
-      for (int j = 0; j < ScriptList.ScriptRecord[i].Script.LangSysCount; ++j) {
-        const auto& record = ScriptList.ScriptRecord[i].Script.LangSysRecord[j];
-        for (int k = 0; k < record.LangSys.FeatureCount; ++k) {
-          uint32_t index = record.LangSys.FeatureIndex[k];
-          if (FeatureList.FeatureRecord[index].FeatureTag == tag[0] ||
-              FeatureList.FeatureRecord[index].FeatureTag == tag[1]) {
-            if (!pdfium::ContainsKey(m_featureMap, index)) {
-              m_featureMap[index] = index;
-            }
-          }
-        }
-      }
-    }
-    if (m_featureMap.empty()) {
-      for (int i = 0; i < FeatureList.FeatureCount; i++) {
-        if (FeatureList.FeatureRecord[i].FeatureTag == tag[0] ||
-            FeatureList.FeatureRecord[i].FeatureTag == tag[1]) {
-          m_featureMap[i] = i;
-        }
-      }
-    }
-    m_bFeautureMapLoad = TRUE;
-  }
-  for (const auto& pair : m_featureMap) {
-    if (GetVerticalGlyphSub(glyphnum, vglyphnum,
-                            &FeatureList.FeatureRecord[pair.second].Feature)) {
-      return true;
-    }
-  }
-  return false;
-}
-
-bool CFX_CTTGSUBTable::GetVerticalGlyphSub(uint32_t glyphnum,
-                                           uint32_t* vglyphnum,
-                                           TFeature* Feature) const {
-  for (int i = 0; i < Feature->LookupCount; i++) {
-    int index = Feature->LookupListIndex[i];
-    if (index < 0 || LookupList.LookupCount < index) {
-      continue;
-    }
-    if (LookupList.Lookup[index].LookupType == 1) {
-      if (GetVerticalGlyphSub2(glyphnum, vglyphnum,
-                               &LookupList.Lookup[index])) {
-        return true;
-      }
-    }
-  }
-  return false;
-}
-
-bool CFX_CTTGSUBTable::GetVerticalGlyphSub2(uint32_t glyphnum,
-                                            uint32_t* vglyphnum,
-                                            TLookup* Lookup) const {
-  for (int i = 0; i < Lookup->SubTableCount; i++) {
-    switch (Lookup->SubTable[i]->SubstFormat) {
-      case 1: {
-        TSingleSubstFormat1* tbl1 = (TSingleSubstFormat1*)Lookup->SubTable[i];
-        if (GetCoverageIndex(tbl1->Coverage.get(), glyphnum) >= 0) {
-          *vglyphnum = glyphnum + tbl1->DeltaGlyphID;
-          return true;
-        }
-        break;
-      }
-      case 2: {
-        TSingleSubstFormat2* tbl2 = (TSingleSubstFormat2*)Lookup->SubTable[i];
-        int index = -1;
-        index = GetCoverageIndex(tbl2->Coverage.get(), glyphnum);
-        if (0 <= index && index < tbl2->GlyphCount) {
-          *vglyphnum = tbl2->Substitute[index];
-          return true;
-        }
-        break;
-      }
-    }
-  }
-  return false;
-}
-
-int CFX_CTTGSUBTable::GetCoverageIndex(TCoverageFormatBase* Coverage,
-                                       uint32_t g) const {
-  int i = 0;
-  if (!Coverage) {
-    return -1;
-  }
-  switch (Coverage->CoverageFormat) {
-    case 1: {
-      TCoverageFormat1* c1 = (TCoverageFormat1*)Coverage;
-      for (i = 0; i < c1->GlyphCount; i++) {
-        if ((uint32_t)c1->GlyphArray[i] == g) {
-          return i;
-        }
-      }
-      return -1;
-    }
-    case 2: {
-      TCoverageFormat2* c2 = (TCoverageFormat2*)Coverage;
-      for (i = 0; i < c2->RangeCount; i++) {
-        uint32_t s = c2->RangeRecord[i].Start;
-        uint32_t e = c2->RangeRecord[i].End;
-        uint32_t si = c2->RangeRecord[i].StartCoverageIndex;
-        if (s <= g && g <= e) {
-          return si + g - s;
-        }
-      }
-      return -1;
-    }
-  }
-  return -1;
-}
-
-uint8_t CFX_CTTGSUBTable::GetUInt8(FT_Bytes& p) const {
-  uint8_t ret = p[0];
-  p += 1;
-  return ret;
-}
-
-int16_t CFX_CTTGSUBTable::GetInt16(FT_Bytes& p) const {
-  uint16_t ret = p[0] << 8 | p[1];
-  p += 2;
-  return *(int16_t*)&ret;
-}
-
-uint16_t CFX_CTTGSUBTable::GetUInt16(FT_Bytes& p) const {
-  uint16_t ret = p[0] << 8 | p[1];
-  p += 2;
-  return ret;
-}
-
-int32_t CFX_CTTGSUBTable::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 CFX_CTTGSUBTable::GetUInt32(FT_Bytes& p) const {
-  uint32_t ret = p[0] << 24 | p[1] << 16 | p[2] << 8 | p[3];
-  p += 4;
-  return ret;
-}
-
-bool CFX_CTTGSUBTable::Parse(FT_Bytes scriptlist,
-                             FT_Bytes featurelist,
-                             FT_Bytes lookuplist) {
-  ParseScriptList(scriptlist, &ScriptList);
-  ParseFeatureList(featurelist, &FeatureList);
-  ParseLookupList(lookuplist, &LookupList);
-  return true;
-}
-
-void CFX_CTTGSUBTable::ParseScriptList(FT_Bytes raw, TScriptList* rec) {
-  int i;
-  FT_Bytes sp = raw;
-  rec->ScriptCount = GetUInt16(sp);
-  if (rec->ScriptCount <= 0) {
-    return;
-  }
-  rec->ScriptRecord.reset(new TScriptRecord[rec->ScriptCount]);
-  for (i = 0; i < rec->ScriptCount; i++) {
-    rec->ScriptRecord[i].ScriptTag = GetUInt32(sp);
-    uint16_t offset = GetUInt16(sp);
-    ParseScript(&raw[offset], &rec->ScriptRecord[i].Script);
-  }
-}
-
-void CFX_CTTGSUBTable::ParseScript(FT_Bytes raw, TScript* rec) {
-  int i;
-  FT_Bytes sp = raw;
-  rec->DefaultLangSys = GetUInt16(sp);
-  rec->LangSysCount = GetUInt16(sp);
-  if (rec->LangSysCount <= 0) {
-    return;
-  }
-  rec->LangSysRecord.reset(new TLangSysRecord[rec->LangSysCount]);
-  for (i = 0; i < rec->LangSysCount; i++) {
-    rec->LangSysRecord[i].LangSysTag = GetUInt32(sp);
-    uint16_t offset = GetUInt16(sp);
-    ParseLangSys(&raw[offset], &rec->LangSysRecord[i].LangSys);
-  }
-}
-
-void CFX_CTTGSUBTable::ParseLangSys(FT_Bytes raw, TLangSys* rec) {
-  FT_Bytes sp = raw;
-  rec->LookupOrder = GetUInt16(sp);
-  rec->ReqFeatureIndex = GetUInt16(sp);
-  rec->FeatureCount = GetUInt16(sp);
-  if (rec->FeatureCount <= 0) {
-    return;
-  }
-  rec->FeatureIndex.reset(new uint16_t[rec->FeatureCount]);
-  FXSYS_memset(rec->FeatureIndex.get(), 0,
-               sizeof(uint16_t) * rec->FeatureCount);
-  for (int i = 0; i < rec->FeatureCount; ++i) {
-    rec->FeatureIndex[i] = GetUInt16(sp);
-  }
-}
-
-void CFX_CTTGSUBTable::ParseFeatureList(FT_Bytes raw, TFeatureList* rec) {
-  int i;
-  FT_Bytes sp = raw;
-  rec->FeatureCount = GetUInt16(sp);
-  if (rec->FeatureCount <= 0) {
-    return;
-  }
-  rec->FeatureRecord.reset(new TFeatureRecord[rec->FeatureCount]);
-  for (i = 0; i < rec->FeatureCount; i++) {
-    rec->FeatureRecord[i].FeatureTag = GetUInt32(sp);
-    uint16_t offset = GetUInt16(sp);
-    ParseFeature(&raw[offset], &rec->FeatureRecord[i].Feature);
-  }
-}
-
-void CFX_CTTGSUBTable::ParseFeature(FT_Bytes raw, TFeature* rec) {
-  int i;
-  FT_Bytes sp = raw;
-  rec->FeatureParams = GetUInt16(sp);
-  rec->LookupCount = GetUInt16(sp);
-  if (rec->LookupCount <= 0) {
-    return;
-  }
-  rec->LookupListIndex.reset(new uint16_t[rec->LookupCount]);
-  for (i = 0; i < rec->LookupCount; i++) {
-    rec->LookupListIndex[i] = GetUInt16(sp);
-  }
-}
-
-void CFX_CTTGSUBTable::ParseLookupList(FT_Bytes raw, TLookupList* rec) {
-  int i;
-  FT_Bytes sp = raw;
-  rec->LookupCount = GetUInt16(sp);
-  if (rec->LookupCount <= 0) {
-    return;
-  }
-  rec->Lookup.reset(new TLookup[rec->LookupCount]);
-  for (i = 0; i < rec->LookupCount; i++) {
-    uint16_t offset = GetUInt16(sp);
-    ParseLookup(&raw[offset], &rec->Lookup[i]);
-  }
-}
-
-void CFX_CTTGSUBTable::ParseLookup(FT_Bytes raw, TLookup* rec) {
-  int i;
-  FT_Bytes sp = raw;
-  rec->LookupType = GetUInt16(sp);
-  rec->LookupFlag = GetUInt16(sp);
-  rec->SubTableCount = GetUInt16(sp);
-  if (rec->SubTableCount <= 0) {
-    return;
-  }
-  rec->SubTable.reset(new TSubTableBase*[rec->SubTableCount]);
-  for (i = 0; i < rec->SubTableCount; i++) {
-    rec->SubTable[i] = nullptr;
-  }
-  if (rec->LookupType != 1) {
-    return;
-  }
-  for (i = 0; i < rec->SubTableCount; i++) {
-    uint16_t offset = GetUInt16(sp);
-    ParseSingleSubst(&raw[offset], &rec->SubTable[i]);
-  }
-}
-
-CFX_CTTGSUBTable::TCoverageFormatBase* CFX_CTTGSUBTable::ParseCoverage(
-    FT_Bytes raw) {
-  FT_Bytes sp = raw;
-  uint16_t format = GetUInt16(sp);
-  TCoverageFormatBase* rec = nullptr;
-  if (format == 1) {
-    rec = new TCoverageFormat1();
-    ParseCoverageFormat1(raw, static_cast<TCoverageFormat1*>(rec));
-  } else if (format == 2) {
-    rec = new TCoverageFormat2();
-    ParseCoverageFormat2(raw, static_cast<TCoverageFormat2*>(rec));
-  }
-  return rec;
-}
-
-void CFX_CTTGSUBTable::ParseCoverageFormat1(FT_Bytes raw,
-                                            TCoverageFormat1* rec) {
-  int i;
-  FT_Bytes sp = raw;
-  GetUInt16(sp);
-  rec->GlyphCount = GetUInt16(sp);
-  if (rec->GlyphCount <= 0) {
-    return;
-  }
-  rec->GlyphArray.reset(new uint16_t[rec->GlyphCount]);
-  for (i = 0; i < rec->GlyphCount; i++) {
-    rec->GlyphArray[i] = GetUInt16(sp);
-  }
-}
-
-void CFX_CTTGSUBTable::ParseCoverageFormat2(FT_Bytes raw,
-                                            TCoverageFormat2* rec) {
-  int i;
-  FT_Bytes sp = raw;
-  GetUInt16(sp);
-  rec->RangeCount = GetUInt16(sp);
-  if (rec->RangeCount <= 0) {
-    return;
-  }
-  rec->RangeRecord.reset(new TRangeRecord[rec->RangeCount]);
-  for (i = 0; i < rec->RangeCount; i++) {
-    rec->RangeRecord[i].Start = GetUInt16(sp);
-    rec->RangeRecord[i].End = GetUInt16(sp);
-    rec->RangeRecord[i].StartCoverageIndex = GetUInt16(sp);
-  }
-}
-
-void CFX_CTTGSUBTable::ParseSingleSubst(FT_Bytes raw, TSubTableBase** rec) {
-  FT_Bytes sp = raw;
-  uint16_t Format = GetUInt16(sp);
-  switch (Format) {
-    case 1:
-      *rec = new TSingleSubstFormat1();
-      ParseSingleSubstFormat1(raw, (TSingleSubstFormat1*)*rec);
-      break;
-    case 2:
-      *rec = new TSingleSubstFormat2();
-      ParseSingleSubstFormat2(raw, (TSingleSubstFormat2*)*rec);
-      break;
-  }
-}
-
-void CFX_CTTGSUBTable::ParseSingleSubstFormat1(FT_Bytes raw,
-                                               TSingleSubstFormat1* rec) {
-  FT_Bytes sp = raw;
-  GetUInt16(sp);
-  uint16_t offset = GetUInt16(sp);
-  rec->Coverage.reset(ParseCoverage(&raw[offset]));
-  rec->DeltaGlyphID = GetInt16(sp);
-}
-
-void CFX_CTTGSUBTable::ParseSingleSubstFormat2(FT_Bytes raw,
-                                               TSingleSubstFormat2* rec) {
-  int i;
-  FT_Bytes sp = raw;
-  GetUInt16(sp);
-  uint16_t offset = GetUInt16(sp);
-  rec->Coverage.reset(ParseCoverage(&raw[offset]));
-  rec->GlyphCount = GetUInt16(sp);
-  if (rec->GlyphCount <= 0) {
-    return;
-  }
-  rec->Substitute.reset(new uint16_t[rec->GlyphCount]);
-  for (i = 0; i < rec->GlyphCount; i++) {
-    rec->Substitute[i] = GetUInt16(sp);
-  }
-}
-
-CFX_CTTGSUBTable::TCoverageFormat1::TCoverageFormat1()
-    : TCoverageFormatBase(1), GlyphCount(0) {}
-
-CFX_CTTGSUBTable::TCoverageFormat1::~TCoverageFormat1() {}
-
-CFX_CTTGSUBTable::TRangeRecord::TRangeRecord()
-    : Start(0), End(0), StartCoverageIndex(0) {}
-
-CFX_CTTGSUBTable::TCoverageFormat2::TCoverageFormat2()
-    : TCoverageFormatBase(2), RangeCount(0) {}
-
-CFX_CTTGSUBTable::TCoverageFormat2::~TCoverageFormat2() {}
-
-CFX_CTTGSUBTable::TSingleSubstFormat1::TSingleSubstFormat1()
-    : TSubTableBase(1), DeltaGlyphID(0) {}
-
-CFX_CTTGSUBTable::TSingleSubstFormat1::~TSingleSubstFormat1() {}
-
-CFX_CTTGSUBTable::TSingleSubstFormat2::TSingleSubstFormat2()
-    : TSubTableBase(2), GlyphCount(0) {}
-
-CFX_CTTGSUBTable::TSingleSubstFormat2::~TSingleSubstFormat2() {}
-
-CFX_CTTGSUBTable::TLookup::TLookup()
-    : LookupType(0), LookupFlag(0), SubTableCount(0) {}
-
-CFX_CTTGSUBTable::TLookup::~TLookup() {
-  if (SubTable) {
-    for (int i = 0; i < SubTableCount; ++i)
-      delete SubTable[i];
-  }
-}
-
-CFX_CTTGSUBTable::TScript::TScript() : DefaultLangSys(0), LangSysCount(0) {}
-
-CFX_CTTGSUBTable::TScript::~TScript() {}
-
-CFX_CTTGSUBTable::TScriptList::TScriptList() : ScriptCount(0) {}
-
-CFX_CTTGSUBTable::TScriptList::~TScriptList() {}
-
-CFX_CTTGSUBTable::TFeature::TFeature() : FeatureParams(0), LookupCount(0) {}
-
-CFX_CTTGSUBTable::TFeature::~TFeature() {}
-
-CFX_CTTGSUBTable::TFeatureList::TFeatureList() : FeatureCount(0) {}
-
-CFX_CTTGSUBTable::TFeatureList::~TFeatureList() {}
-
-CFX_CTTGSUBTable::TLookupList::TLookupList() : LookupCount(0) {}
-
-CFX_CTTGSUBTable::TLookupList::~TLookupList() {}
-
-CFX_CTTGSUBTable::TLangSys::TLangSys()
-    : LookupOrder(0), ReqFeatureIndex(0), FeatureCount(0) {}
-
-CFX_CTTGSUBTable::TLangSys::~TLangSys() {}