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authordsinclair <dsinclair@chromium.org>2016-10-04 11:08:49 -0700
committerCommit bot <commit-bot@chromium.org>2016-10-04 11:08:49 -0700
commitbc5e6d289ed40efec2b0e03427e8fc2947bf53e3 (patch)
treefa1509c1fe1a46a6ebe8861768804883041973be /core/fpdfapi/font/ttgsubtable.cpp
parent241543581696e996093bf0c2ae09ece6afe13ba2 (diff)
downloadpdfium-bc5e6d289ed40efec2b0e03427e8fc2947bf53e3.tar.xz
Move core/fpdfapi/fpdf_font to core/fpdfapi/font
BUG=pdfium:603 Review-Url: https://codereview.chromium.org/2392773003
Diffstat (limited to 'core/fpdfapi/font/ttgsubtable.cpp')
-rw-r--r--core/fpdfapi/font/ttgsubtable.cpp502
1 files changed, 502 insertions, 0 deletions
diff --git a/core/fpdfapi/font/ttgsubtable.cpp b/core/fpdfapi/font/ttgsubtable.cpp
new file mode 100644
index 0000000000..51f533d7d1
--- /dev/null
+++ b/core/fpdfapi/font/ttgsubtable.cpp
@@ -0,0 +1,502 @@
+// 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/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() {}