// Copyright 2014 PDFium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
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#include "core/fpdfapi/fpdf_font/ttgsubtable.h"
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#include "core/fxge/include/fx_freetype.h"
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#include "core/fxge/include/fx_ge.h"
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#include "third_party/base/stl_util.h"
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CFX_GlyphMap::CFX_GlyphMap() {}
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CFX_GlyphMap::~CFX_GlyphMap() {}
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extern "C" {
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static int _CompareInt(const void* p1, const void* p2) {
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return (*(uint32_t*)p1) - (*(uint32_t*)p2);
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}
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};
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struct _IntPair {
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int32_t key;
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int32_t value;
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};
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void CFX_GlyphMap::SetAt(int key, int value) {
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uint32_t count = m_Buffer.GetSize() / sizeof(_IntPair);
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_IntPair* buf = (_IntPair*)m_Buffer.GetBuffer();
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_IntPair pair = {key, value};
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if (count == 0 || key > buf[count - 1].key) {
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m_Buffer.AppendBlock(&pair, sizeof(_IntPair));
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return;
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}
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int low = 0, high = count - 1;
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while (low <= high) {
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int mid = (low + high) / 2;
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if (buf[mid].key < key) {
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low = mid + 1;
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} else if (buf[mid].key > key) {
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high = mid - 1;
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} else {
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buf[mid].value = value;
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return;
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}
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}
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m_Buffer.InsertBlock(low * sizeof(_IntPair), &pair, sizeof(_IntPair));
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}
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FX_BOOL CFX_GlyphMap::Lookup(int key, int& value) {
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void* pResult = FXSYS_bsearch(&key, m_Buffer.GetBuffer(),
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m_Buffer.GetSize() / sizeof(_IntPair),
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sizeof(_IntPair), _CompareInt);
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if (!pResult) {
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return FALSE;
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}
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value = ((uint32_t*)pResult)[1];
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return TRUE;
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}
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CFX_CTTGSUBTable::CFX_CTTGSUBTable()
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: m_bFeautureMapLoad(FALSE), loaded(false) {}
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CFX_CTTGSUBTable::CFX_CTTGSUBTable(FT_Bytes gsub)
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: m_bFeautureMapLoad(FALSE), loaded(false) {
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LoadGSUBTable(gsub);
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}
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CFX_CTTGSUBTable::~CFX_CTTGSUBTable() {}
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bool CFX_CTTGSUBTable::IsOk() const {
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return loaded;
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}
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bool CFX_CTTGSUBTable::LoadGSUBTable(FT_Bytes gsub) {
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header.Version = gsub[0] << 24 | gsub[1] << 16 | gsub[2] << 8 | gsub[3];
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if (header.Version != 0x00010000) {
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return false;
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}
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header.ScriptList = gsub[4] << 8 | gsub[5];
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header.FeatureList = gsub[6] << 8 | gsub[7];
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header.LookupList = gsub[8] << 8 | gsub[9];
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return Parse(&gsub[header.ScriptList], &gsub[header.FeatureList],
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&gsub[header.LookupList]);
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}
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bool CFX_CTTGSUBTable::GetVerticalGlyph(uint32_t glyphnum,
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uint32_t* vglyphnum) {
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uint32_t tag[] = {
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(uint8_t)'v' << 24 | (uint8_t)'r' << 16 | (uint8_t)'t' << 8 |
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(uint8_t)'2',
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(uint8_t)'v' << 24 | (uint8_t)'e' << 16 | (uint8_t)'r' << 8 |
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(uint8_t)'t',
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};
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if (!m_bFeautureMapLoad) {
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for (int i = 0; i < ScriptList.ScriptCount; i++) {
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for (int j = 0; j < ScriptList.ScriptRecord[i].Script.LangSysCount; ++j) {
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const auto& record = ScriptList.ScriptRecord[i].Script.LangSysRecord[j];
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for (int k = 0; k < record.LangSys.FeatureCount; ++k) {
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uint32_t index = record.LangSys.FeatureIndex[k];
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if (FeatureList.FeatureRecord[index].FeatureTag == tag[0] ||
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FeatureList.FeatureRecord[index].FeatureTag == tag[1]) {
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if (!pdfium::ContainsKey(m_featureMap, index)) {
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m_featureMap[index] = index;
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}
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}
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}
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}
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}
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if (m_featureMap.empty()) {
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for (int i = 0; i < FeatureList.FeatureCount; i++) {
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if (FeatureList.FeatureRecord[i].FeatureTag == tag[0] ||
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FeatureList.FeatureRecord[i].FeatureTag == tag[1]) {
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m_featureMap[i] = i;
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}
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}
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}
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m_bFeautureMapLoad = TRUE;
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}
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for (const auto& pair : m_featureMap) {
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if (GetVerticalGlyphSub(glyphnum, vglyphnum,
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&FeatureList.FeatureRecord[pair.second].Feature)) {
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return true;
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}
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}
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return false;
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}
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bool CFX_CTTGSUBTable::GetVerticalGlyphSub(uint32_t glyphnum,
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uint32_t* vglyphnum,
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TFeature* Feature) const {
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for (int i = 0; i < Feature->LookupCount; i++) {
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int index = Feature->LookupListIndex[i];
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if (index < 0 || LookupList.LookupCount < index) {
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continue;
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}
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if (LookupList.Lookup[index].LookupType == 1) {
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if (GetVerticalGlyphSub2(glyphnum, vglyphnum,
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&LookupList.Lookup[index])) {
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return true;
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}
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}
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}
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return false;
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}
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bool CFX_CTTGSUBTable::GetVerticalGlyphSub2(uint32_t glyphnum,
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uint32_t* vglyphnum,
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TLookup* Lookup) const {
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for (int i = 0; i < Lookup->SubTableCount; i++) {
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switch (Lookup->SubTable[i]->SubstFormat) {
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case 1: {
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TSingleSubstFormat1* tbl1 = (TSingleSubstFormat1*)Lookup->SubTable[i];
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if (GetCoverageIndex(tbl1->Coverage.get(), glyphnum) >= 0) {
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*vglyphnum = glyphnum + tbl1->DeltaGlyphID;
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return true;
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}
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break;
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}
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case 2: {
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TSingleSubstFormat2* tbl2 = (TSingleSubstFormat2*)Lookup->SubTable[i];
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int index = -1;
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index = GetCoverageIndex(tbl2->Coverage.get(), glyphnum);
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if (0 <= index && index < tbl2->GlyphCount) {
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*vglyphnum = tbl2->Substitute[index];
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return true;
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}
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break;
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}
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}
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}
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return false;
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}
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int CFX_CTTGSUBTable::GetCoverageIndex(TCoverageFormatBase* Coverage,
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uint32_t g) const {
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int i = 0;
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if (!Coverage) {
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return -1;
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}
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switch (Coverage->CoverageFormat) {
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case 1: {
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TCoverageFormat1* c1 = (TCoverageFormat1*)Coverage;
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for (i = 0; i < c1->GlyphCount; i++) {
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if ((uint32_t)c1->GlyphArray[i] == g) {
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return i;
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}
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}
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return -1;
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}
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case 2: {
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TCoverageFormat2* c2 = (TCoverageFormat2*)Coverage;
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for (i = 0; i < c2->RangeCount; i++) {
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uint32_t s = c2->RangeRecord[i].Start;
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uint32_t e = c2->RangeRecord[i].End;
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uint32_t si = c2->RangeRecord[i].StartCoverageIndex;
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if (s <= g && g <= e) {
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return si + g - s;
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}
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}
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return -1;
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}
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}
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return -1;
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}
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uint8_t CFX_CTTGSUBTable::GetUInt8(FT_Bytes& p) const {
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uint8_t ret = p[0];
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p += 1;
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return ret;
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}
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int16_t CFX_CTTGSUBTable::GetInt16(FT_Bytes& p) const {
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uint16_t ret = p[0] << 8 | p[1];
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p += 2;
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return *(int16_t*)&ret;
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}
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uint16_t CFX_CTTGSUBTable::GetUInt16(FT_Bytes& p) const {
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uint16_t ret = p[0] << 8 | p[1];
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p += 2;
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return ret;
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}
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int32_t CFX_CTTGSUBTable::GetInt32(FT_Bytes& p) const {
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uint32_t ret = p[0] << 24 | p[1] << 16 | p[2] << 8 | p[3];
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p += 4;
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return *(int32_t*)&ret;
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}
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uint32_t CFX_CTTGSUBTable::GetUInt32(FT_Bytes& p) const {
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uint32_t ret = p[0] << 24 | p[1] << 16 | p[2] << 8 | p[3];
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p += 4;
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return ret;
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}
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bool CFX_CTTGSUBTable::Parse(FT_Bytes scriptlist,
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FT_Bytes featurelist,
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FT_Bytes lookuplist) {
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ParseScriptList(scriptlist, &ScriptList);
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ParseFeatureList(featurelist, &FeatureList);
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ParseLookupList(lookuplist, &LookupList);
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return true;
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}
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void CFX_CTTGSUBTable::ParseScriptList(FT_Bytes raw, TScriptList* rec) {
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int i;
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FT_Bytes sp = raw;
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rec->ScriptCount = GetUInt16(sp);
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if (rec->ScriptCount <= 0) {
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return;
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}
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rec->ScriptRecord.reset(new TScriptRecord[rec->ScriptCount]);
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for (i = 0; i < rec->ScriptCount; i++) {
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rec->ScriptRecord[i].ScriptTag = GetUInt32(sp);
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uint16_t offset = GetUInt16(sp);
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ParseScript(&raw[offset], &rec->ScriptRecord[i].Script);
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}
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}
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void CFX_CTTGSUBTable::ParseScript(FT_Bytes raw, TScript* rec) {
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int i;
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FT_Bytes sp = raw;
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rec->DefaultLangSys = GetUInt16(sp);
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rec->LangSysCount = GetUInt16(sp);
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if (rec->LangSysCount <= 0) {
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return;
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}
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rec->LangSysRecord.reset(new TLangSysRecord[rec->LangSysCount]);
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for (i = 0; i < rec->LangSysCount; i++) {
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rec->LangSysRecord[i].LangSysTag = GetUInt32(sp);
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uint16_t offset = GetUInt16(sp);
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ParseLangSys(&raw[offset], &rec->LangSysRecord[i].LangSys);
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}
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}
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void CFX_CTTGSUBTable::ParseLangSys(FT_Bytes raw, TLangSys* rec) {
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FT_Bytes sp = raw;
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rec->LookupOrder = GetUInt16(sp);
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rec->ReqFeatureIndex = GetUInt16(sp);
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rec->FeatureCount = GetUInt16(sp);
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if (rec->FeatureCount <= 0) {
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return;
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}
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rec->FeatureIndex.reset(new uint16_t[rec->FeatureCount]);
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FXSYS_memset(rec->FeatureIndex.get(), 0,
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sizeof(uint16_t) * rec->FeatureCount);
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for (int i = 0; i < rec->FeatureCount; ++i) {
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rec->FeatureIndex[i] = GetUInt16(sp);
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}
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}
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void CFX_CTTGSUBTable::ParseFeatureList(FT_Bytes raw, TFeatureList* rec) {
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int i;
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FT_Bytes sp = raw;
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rec->FeatureCount = GetUInt16(sp);
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if (rec->FeatureCount <= 0) {
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return;
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}
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rec->FeatureRecord.reset(new TFeatureRecord[rec->FeatureCount]);
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for (i = 0; i < rec->FeatureCount; i++) {
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rec->FeatureRecord[i].FeatureTag = GetUInt32(sp);
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uint16_t offset = GetUInt16(sp);
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ParseFeature(&raw[offset], &rec->FeatureRecord[i].Feature);
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}
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}
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void CFX_CTTGSUBTable::ParseFeature(FT_Bytes raw, TFeature* rec) {
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int i;
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FT_Bytes sp = raw;
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rec->FeatureParams = GetUInt16(sp);
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rec->LookupCount = GetUInt16(sp);
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if (rec->LookupCount <= 0) {
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return;
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}
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rec->LookupListIndex.reset(new uint16_t[rec->LookupCount]);
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for (i = 0; i < rec->LookupCount; i++) {
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rec->LookupListIndex[i] = GetUInt16(sp);
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}
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}
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void CFX_CTTGSUBTable::ParseLookupList(FT_Bytes raw, TLookupList* rec) {
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int i;
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FT_Bytes sp = raw;
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rec->LookupCount = GetUInt16(sp);
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if (rec->LookupCount <= 0) {
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return;
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}
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rec->Lookup.reset(new TLookup[rec->LookupCount]);
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for (i = 0; i < rec->LookupCount; i++) {
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uint16_t offset = GetUInt16(sp);
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ParseLookup(&raw[offset], &rec->Lookup[i]);
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}
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}
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void CFX_CTTGSUBTable::ParseLookup(FT_Bytes raw, TLookup* rec) {
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int i;
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FT_Bytes sp = raw;
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rec->LookupType = GetUInt16(sp);
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rec->LookupFlag = GetUInt16(sp);
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rec->SubTableCount = GetUInt16(sp);
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if (rec->SubTableCount <= 0) {
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return;
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}
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rec->SubTable.reset(new TSubTableBase*[rec->SubTableCount]);
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for (i = 0; i < rec->SubTableCount; i++) {
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rec->SubTable[i] = nullptr;
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}
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if (rec->LookupType != 1) {
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return;
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}
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for (i = 0; i < rec->SubTableCount; i++) {
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uint16_t offset = GetUInt16(sp);
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ParseSingleSubst(&raw[offset], &rec->SubTable[i]);
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}
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}
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CFX_CTTGSUBTable::TCoverageFormatBase* CFX_CTTGSUBTable::ParseCoverage(
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FT_Bytes raw) {
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FT_Bytes sp = raw;
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uint16_t format = GetUInt16(sp);
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TCoverageFormatBase* rec = nullptr;
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if (format == 1) {
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rec = new TCoverageFormat1();
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ParseCoverageFormat1(raw, static_cast<TCoverageFormat1*>(rec));
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} else if (format == 2) {
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rec = new TCoverageFormat2();
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ParseCoverageFormat2(raw, static_cast<TCoverageFormat2*>(rec));
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}
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return rec;
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}
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void CFX_CTTGSUBTable::ParseCoverageFormat1(FT_Bytes raw,
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TCoverageFormat1* rec) {
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int i;
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FT_Bytes sp = raw;
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GetUInt16(sp);
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rec->GlyphCount = GetUInt16(sp);
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if (rec->GlyphCount <= 0) {
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return;
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}
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rec->GlyphArray.reset(new uint16_t[rec->GlyphCount]);
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for (i = 0; i < rec->GlyphCount; i++) {
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rec->GlyphArray[i] = GetUInt16(sp);
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}
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}
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void CFX_CTTGSUBTable::ParseCoverageFormat2(FT_Bytes raw,
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TCoverageFormat2* rec) {
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int i;
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FT_Bytes sp = raw;
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GetUInt16(sp);
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rec->RangeCount = GetUInt16(sp);
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if (rec->RangeCount <= 0) {
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return;
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}
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rec->RangeRecord.reset(new TRangeRecord[rec->RangeCount]);
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for (i = 0; i < rec->RangeCount; i++) {
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rec->RangeRecord[i].Start = GetUInt16(sp);
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rec->RangeRecord[i].End = GetUInt16(sp);
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rec->RangeRecord[i].StartCoverageIndex = GetUInt16(sp);
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}
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}
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void CFX_CTTGSUBTable::ParseSingleSubst(FT_Bytes raw, TSubTableBase** rec) {
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FT_Bytes sp = raw;
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uint16_t Format = GetUInt16(sp);
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switch (Format) {
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case 1:
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*rec = new TSingleSubstFormat1();
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ParseSingleSubstFormat1(raw, (TSingleSubstFormat1*)*rec);
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break;
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case 2:
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*rec = new TSingleSubstFormat2();
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ParseSingleSubstFormat2(raw, (TSingleSubstFormat2*)*rec);
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break;
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}
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}
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void CFX_CTTGSUBTable::ParseSingleSubstFormat1(FT_Bytes raw,
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TSingleSubstFormat1* rec) {
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FT_Bytes sp = raw;
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GetUInt16(sp);
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uint16_t offset = GetUInt16(sp);
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rec->Coverage.reset(ParseCoverage(&raw[offset]));
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rec->DeltaGlyphID = GetInt16(sp);
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}
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void CFX_CTTGSUBTable::ParseSingleSubstFormat2(FT_Bytes raw,
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TSingleSubstFormat2* rec) {
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int i;
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FT_Bytes sp = raw;
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GetUInt16(sp);
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uint16_t offset = GetUInt16(sp);
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rec->Coverage.reset(ParseCoverage(&raw[offset]));
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rec->GlyphCount = GetUInt16(sp);
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if (rec->GlyphCount <= 0) {
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return;
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}
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rec->Substitute.reset(new uint16_t[rec->GlyphCount]);
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for (i = 0; i < rec->GlyphCount; i++) {
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rec->Substitute[i] = GetUInt16(sp);
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}
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}
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CFX_CTTGSUBTable::TCoverageFormat1::TCoverageFormat1()
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: TCoverageFormatBase(1), GlyphCount(0) {}
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CFX_CTTGSUBTable::TCoverageFormat1::~TCoverageFormat1() {}
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CFX_CTTGSUBTable::TRangeRecord::TRangeRecord()
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: Start(0), End(0), StartCoverageIndex(0) {}
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CFX_CTTGSUBTable::TCoverageFormat2::TCoverageFormat2()
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: TCoverageFormatBase(2), RangeCount(0) {}
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CFX_CTTGSUBTable::TCoverageFormat2::~TCoverageFormat2() {}
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CFX_CTTGSUBTable::TSingleSubstFormat1::TSingleSubstFormat1()
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: TSubTableBase(1), DeltaGlyphID(0) {}
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CFX_CTTGSUBTable::TSingleSubstFormat1::~TSingleSubstFormat1() {}
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CFX_CTTGSUBTable::TSingleSubstFormat2::TSingleSubstFormat2()
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: TSubTableBase(2), GlyphCount(0) {}
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CFX_CTTGSUBTable::TSingleSubstFormat2::~TSingleSubstFormat2() {}
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CFX_CTTGSUBTable::TLookup::TLookup()
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: LookupType(0), LookupFlag(0), SubTableCount(0) {}
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CFX_CTTGSUBTable::TLookup::~TLookup() {
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if (SubTable) {
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for (int i = 0; i < SubTableCount; ++i)
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delete SubTable[i];
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}
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}
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CFX_CTTGSUBTable::TScript::TScript() : DefaultLangSys(0), LangSysCount(0) {}
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CFX_CTTGSUBTable::TScript::~TScript() {}
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CFX_CTTGSUBTable::TScriptList::TScriptList() : ScriptCount(0) {}
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CFX_CTTGSUBTable::TScriptList::~TScriptList() {}
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CFX_CTTGSUBTable::TFeature::TFeature() : FeatureParams(0), LookupCount(0) {}
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CFX_CTTGSUBTable::TFeature::~TFeature() {}
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CFX_CTTGSUBTable::TFeatureList::TFeatureList() : FeatureCount(0) {}
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CFX_CTTGSUBTable::TFeatureList::~TFeatureList() {}
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CFX_CTTGSUBTable::TLookupList::TLookupList() : LookupCount(0) {}
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CFX_CTTGSUBTable::TLookupList::~TLookupList() {}
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CFX_CTTGSUBTable::TLangSys::TLangSys()
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: LookupOrder(0), ReqFeatureIndex(0), FeatureCount(0) {}
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CFX_CTTGSUBTable::TLangSys::~TLangSys() {}
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