| // 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/font_int.h" |
| |
| #include <memory> |
| #include <utility> |
| |
| #include "core/fpdfapi/cmaps/cmap_int.h" |
| #include "core/fpdfapi/cpdf_modulemgr.h" |
| #include "core/fpdfapi/font/ttgsubtable.h" |
| #include "core/fpdfapi/page/cpdf_pagemodule.h" |
| #include "core/fpdfapi/parser/cpdf_array.h" |
| #include "core/fpdfapi/parser/cpdf_dictionary.h" |
| #include "core/fpdfapi/parser/cpdf_simple_parser.h" |
| #include "core/fxcrt/fx_extension.h" |
| #include "core/fxge/fx_freetype.h" |
| #include "third_party/base/logging.h" |
| #include "third_party/base/stl_util.h" |
| |
| namespace { |
| |
| const char* const g_CharsetNames[CIDSET_NUM_SETS] = {nullptr, "GB1", "CNS1", |
| "Japan1", "Korea1", "UCS"}; |
| |
| class CPDF_PredefinedCMap { |
| public: |
| const char* m_pName; |
| CIDSet m_Charset; |
| CIDCoding m_Coding; |
| CPDF_CMap::CodingScheme m_CodingScheme; |
| uint8_t m_LeadingSegCount; |
| uint8_t m_LeadingSegs[4]; |
| }; |
| |
| const CPDF_PredefinedCMap g_PredefinedCMaps[] = { |
| {"GB-EUC", |
| CIDSET_GB1, |
| CIDCODING_GB, |
| CPDF_CMap::MixedTwoBytes, |
| 1, |
| {0xa1, 0xfe}}, |
| {"GBpc-EUC", |
| CIDSET_GB1, |
| CIDCODING_GB, |
| CPDF_CMap::MixedTwoBytes, |
| 1, |
| {0xa1, 0xfc}}, |
| {"GBK-EUC", |
| CIDSET_GB1, |
| CIDCODING_GB, |
| CPDF_CMap::MixedTwoBytes, |
| 1, |
| {0x81, 0xfe}}, |
| {"GBKp-EUC", |
| CIDSET_GB1, |
| CIDCODING_GB, |
| CPDF_CMap::MixedTwoBytes, |
| 1, |
| {0x81, 0xfe}}, |
| {"GBK2K-EUC", |
| CIDSET_GB1, |
| CIDCODING_GB, |
| CPDF_CMap::MixedTwoBytes, |
| 1, |
| {0x81, 0xfe}}, |
| {"GBK2K", |
| CIDSET_GB1, |
| CIDCODING_GB, |
| CPDF_CMap::MixedTwoBytes, |
| 1, |
| {0x81, 0xfe}}, |
| {"UniGB-UCS2", CIDSET_GB1, CIDCODING_UCS2, CPDF_CMap::TwoBytes, 0, {}}, |
| {"UniGB-UTF16", CIDSET_GB1, CIDCODING_UTF16, CPDF_CMap::TwoBytes, 0, {}}, |
| {"B5pc", |
| CIDSET_CNS1, |
| CIDCODING_BIG5, |
| CPDF_CMap::MixedTwoBytes, |
| 1, |
| {0xa1, 0xfc}}, |
| {"HKscs-B5", |
| CIDSET_CNS1, |
| CIDCODING_BIG5, |
| CPDF_CMap::MixedTwoBytes, |
| 1, |
| {0x88, 0xfe}}, |
| {"ETen-B5", |
| CIDSET_CNS1, |
| CIDCODING_BIG5, |
| CPDF_CMap::MixedTwoBytes, |
| 1, |
| {0xa1, 0xfe}}, |
| {"ETenms-B5", |
| CIDSET_CNS1, |
| CIDCODING_BIG5, |
| CPDF_CMap::MixedTwoBytes, |
| 1, |
| {0xa1, 0xfe}}, |
| {"UniCNS-UCS2", CIDSET_CNS1, CIDCODING_UCS2, CPDF_CMap::TwoBytes, 0, {}}, |
| {"UniCNS-UTF16", CIDSET_CNS1, CIDCODING_UTF16, CPDF_CMap::TwoBytes, 0, {}}, |
| {"83pv-RKSJ", |
| CIDSET_JAPAN1, |
| CIDCODING_JIS, |
| CPDF_CMap::MixedTwoBytes, |
| 2, |
| {0x81, 0x9f, 0xe0, 0xfc}}, |
| {"90ms-RKSJ", |
| CIDSET_JAPAN1, |
| CIDCODING_JIS, |
| CPDF_CMap::MixedTwoBytes, |
| 2, |
| {0x81, 0x9f, 0xe0, 0xfc}}, |
| {"90msp-RKSJ", |
| CIDSET_JAPAN1, |
| CIDCODING_JIS, |
| CPDF_CMap::MixedTwoBytes, |
| 2, |
| {0x81, 0x9f, 0xe0, 0xfc}}, |
| {"90pv-RKSJ", |
| CIDSET_JAPAN1, |
| CIDCODING_JIS, |
| CPDF_CMap::MixedTwoBytes, |
| 2, |
| {0x81, 0x9f, 0xe0, 0xfc}}, |
| {"Add-RKSJ", |
| CIDSET_JAPAN1, |
| CIDCODING_JIS, |
| CPDF_CMap::MixedTwoBytes, |
| 2, |
| {0x81, 0x9f, 0xe0, 0xfc}}, |
| {"EUC", |
| CIDSET_JAPAN1, |
| CIDCODING_JIS, |
| CPDF_CMap::MixedTwoBytes, |
| 2, |
| {0x8e, 0x8e, 0xa1, 0xfe}}, |
| {"H", CIDSET_JAPAN1, CIDCODING_JIS, CPDF_CMap::TwoBytes, 1, {0x21, 0x7e}}, |
| {"V", CIDSET_JAPAN1, CIDCODING_JIS, CPDF_CMap::TwoBytes, 1, {0x21, 0x7e}}, |
| {"Ext-RKSJ", |
| CIDSET_JAPAN1, |
| CIDCODING_JIS, |
| CPDF_CMap::MixedTwoBytes, |
| 2, |
| {0x81, 0x9f, 0xe0, 0xfc}}, |
| {"UniJIS-UCS2", CIDSET_JAPAN1, CIDCODING_UCS2, CPDF_CMap::TwoBytes, 0, {}}, |
| {"UniJIS-UCS2-HW", |
| CIDSET_JAPAN1, |
| CIDCODING_UCS2, |
| CPDF_CMap::TwoBytes, |
| 0, |
| {}}, |
| {"UniJIS-UTF16", |
| CIDSET_JAPAN1, |
| CIDCODING_UTF16, |
| CPDF_CMap::TwoBytes, |
| 0, |
| {}}, |
| {"KSC-EUC", |
| CIDSET_KOREA1, |
| CIDCODING_KOREA, |
| CPDF_CMap::MixedTwoBytes, |
| 1, |
| {0xa1, 0xfe}}, |
| {"KSCms-UHC", |
| CIDSET_KOREA1, |
| CIDCODING_KOREA, |
| CPDF_CMap::MixedTwoBytes, |
| 1, |
| {0x81, 0xfe}}, |
| {"KSCms-UHC-HW", |
| CIDSET_KOREA1, |
| CIDCODING_KOREA, |
| CPDF_CMap::MixedTwoBytes, |
| 1, |
| {0x81, 0xfe}}, |
| {"KSCpc-EUC", |
| CIDSET_KOREA1, |
| CIDCODING_KOREA, |
| CPDF_CMap::MixedTwoBytes, |
| 1, |
| {0xa1, 0xfd}}, |
| {"UniKS-UCS2", CIDSET_KOREA1, CIDCODING_UCS2, CPDF_CMap::TwoBytes, 0, {}}, |
| {"UniKS-UTF16", CIDSET_KOREA1, CIDCODING_UTF16, CPDF_CMap::TwoBytes, 0, {}}, |
| }; |
| |
| CIDSet CIDSetFromSizeT(size_t index) { |
| if (index >= CIDSET_NUM_SETS) { |
| NOTREACHED(); |
| return CIDSET_UNKNOWN; |
| } |
| return static_cast<CIDSet>(index); |
| } |
| |
| CFX_ByteStringC CMap_GetString(const CFX_ByteStringC& word) { |
| if (word.GetLength() <= 2) |
| return CFX_ByteStringC(); |
| return CFX_ByteStringC(&word[1], word.GetLength() - 2); |
| } |
| |
| int CompareDWORD(const void* data1, const void* data2) { |
| return (*(uint32_t*)data1) - (*(uint32_t*)data2); |
| } |
| |
| int CompareCID(const void* key, const void* element) { |
| if ((*(uint32_t*)key) < (*(uint32_t*)element)) { |
| return -1; |
| } |
| if ((*(uint32_t*)key) > |
| (*(uint32_t*)element) + ((uint32_t*)element)[1] / 65536) { |
| return 1; |
| } |
| return 0; |
| } |
| |
| int CheckCodeRange(uint8_t* codes, |
| int size, |
| CMap_CodeRange* pRanges, |
| int nRanges) { |
| int iSeg = nRanges - 1; |
| while (iSeg >= 0) { |
| if (pRanges[iSeg].m_CharSize < size) { |
| --iSeg; |
| continue; |
| } |
| int iChar = 0; |
| while (iChar < size) { |
| if (codes[iChar] < pRanges[iSeg].m_Lower[iChar] || |
| codes[iChar] > pRanges[iSeg].m_Upper[iChar]) { |
| break; |
| } |
| ++iChar; |
| } |
| if (iChar == pRanges[iSeg].m_CharSize) |
| return 2; |
| |
| if (iChar) |
| return (size == pRanges[iSeg].m_CharSize) ? 2 : 1; |
| iSeg--; |
| } |
| return 0; |
| } |
| |
| int GetCharSizeImpl(uint32_t charcode, |
| CMap_CodeRange* pRanges, |
| int iRangesSize) { |
| if (!iRangesSize) |
| return 1; |
| |
| uint8_t codes[4]; |
| codes[0] = codes[1] = 0x00; |
| codes[2] = (uint8_t)(charcode >> 8 & 0xFF); |
| codes[3] = (uint8_t)charcode; |
| int offset = 0; |
| int size = 4; |
| for (int i = 0; i < 4; ++i) { |
| int iSeg = iRangesSize - 1; |
| while (iSeg >= 0) { |
| if (pRanges[iSeg].m_CharSize < size) { |
| --iSeg; |
| continue; |
| } |
| int iChar = 0; |
| while (iChar < size) { |
| if (codes[offset + iChar] < pRanges[iSeg].m_Lower[iChar] || |
| codes[offset + iChar] > pRanges[iSeg].m_Upper[iChar]) { |
| break; |
| } |
| ++iChar; |
| } |
| if (iChar == pRanges[iSeg].m_CharSize) |
| return size; |
| --iSeg; |
| } |
| --size; |
| ++offset; |
| } |
| return 1; |
| } |
| |
| } // namespace |
| |
| CPDF_CMapManager::CPDF_CMapManager() {} |
| |
| CPDF_CMapManager::~CPDF_CMapManager() {} |
| |
| CFX_RetainPtr<CPDF_CMap> CPDF_CMapManager::GetPredefinedCMap( |
| const CFX_ByteString& name, |
| bool bPromptCJK) { |
| auto it = m_CMaps.find(name); |
| if (it != m_CMaps.end()) |
| return it->second; |
| |
| CFX_RetainPtr<CPDF_CMap> pCMap = LoadPredefinedCMap(name, bPromptCJK); |
| if (!name.IsEmpty()) |
| m_CMaps[name] = pCMap; |
| |
| return pCMap; |
| } |
| |
| CFX_RetainPtr<CPDF_CMap> CPDF_CMapManager::LoadPredefinedCMap( |
| const CFX_ByteString& name, |
| bool bPromptCJK) { |
| const char* pname = name.c_str(); |
| if (*pname == '/') |
| pname++; |
| |
| auto pCMap = pdfium::MakeRetain<CPDF_CMap>(); |
| pCMap->LoadPredefined(this, pname, bPromptCJK); |
| return pCMap; |
| } |
| |
| CPDF_CID2UnicodeMap* CPDF_CMapManager::GetCID2UnicodeMap(CIDSet charset, |
| bool bPromptCJK) { |
| if (!m_CID2UnicodeMaps[charset]) |
| m_CID2UnicodeMaps[charset] = LoadCID2UnicodeMap(charset, bPromptCJK); |
| |
| return m_CID2UnicodeMaps[charset].get(); |
| } |
| |
| std::unique_ptr<CPDF_CID2UnicodeMap> CPDF_CMapManager::LoadCID2UnicodeMap( |
| CIDSet charset, |
| bool bPromptCJK) { |
| auto pMap = pdfium::MakeUnique<CPDF_CID2UnicodeMap>(); |
| pMap->Load(this, charset, bPromptCJK); |
| return pMap; |
| } |
| |
| CPDF_CMapParser::CPDF_CMapParser() |
| : m_pCMap(nullptr), m_Status(0), m_CodeSeq(0) {} |
| |
| CPDF_CMapParser::~CPDF_CMapParser() {} |
| |
| void CPDF_CMapParser::Initialize(CPDF_CMap* pCMap) { |
| m_pCMap = pCMap; |
| m_Status = 0; |
| m_CodeSeq = 0; |
| m_AddMaps.EstimateSize(0, 10240); |
| } |
| |
| void CPDF_CMapParser::ParseWord(const CFX_ByteStringC& word) { |
| if (word.IsEmpty()) { |
| return; |
| } |
| if (word == "begincidchar") { |
| m_Status = 1; |
| m_CodeSeq = 0; |
| } else if (word == "begincidrange") { |
| m_Status = 2; |
| m_CodeSeq = 0; |
| } else if (word == "endcidrange" || word == "endcidchar") { |
| m_Status = 0; |
| } else if (word == "/WMode") { |
| m_Status = 6; |
| } else if (word == "/Registry") { |
| m_Status = 3; |
| } else if (word == "/Ordering") { |
| m_Status = 4; |
| } else if (word == "/Supplement") { |
| m_Status = 5; |
| } else if (word == "begincodespacerange") { |
| m_Status = 7; |
| m_CodeSeq = 0; |
| } else if (word == "usecmap") { |
| } else if (m_Status == 1 || m_Status == 2) { |
| m_CodePoints[m_CodeSeq] = CMap_GetCode(word); |
| m_CodeSeq++; |
| uint32_t StartCode, EndCode; |
| uint16_t StartCID; |
| if (m_Status == 1) { |
| if (m_CodeSeq < 2) { |
| return; |
| } |
| EndCode = StartCode = m_CodePoints[0]; |
| StartCID = (uint16_t)m_CodePoints[1]; |
| } else { |
| if (m_CodeSeq < 3) { |
| return; |
| } |
| StartCode = m_CodePoints[0]; |
| EndCode = m_CodePoints[1]; |
| StartCID = (uint16_t)m_CodePoints[2]; |
| } |
| if (EndCode < 0x10000) { |
| for (uint32_t code = StartCode; code <= EndCode; code++) { |
| m_pCMap->m_pMapping[code] = (uint16_t)(StartCID + code - StartCode); |
| } |
| } else { |
| uint32_t buf[2]; |
| buf[0] = StartCode; |
| buf[1] = ((EndCode - StartCode) << 16) + StartCID; |
| m_AddMaps.AppendBlock(buf, sizeof buf); |
| } |
| m_CodeSeq = 0; |
| } else if (m_Status == 3) { |
| m_Status = 0; |
| } else if (m_Status == 4) { |
| m_pCMap->m_Charset = CharsetFromOrdering(CMap_GetString(word)); |
| m_Status = 0; |
| } else if (m_Status == 5) { |
| m_Status = 0; |
| } else if (m_Status == 6) { |
| m_pCMap->m_bVertical = CMap_GetCode(word) != 0; |
| m_Status = 0; |
| } else if (m_Status == 7) { |
| if (word == "endcodespacerange") { |
| uint32_t nSegs = pdfium::CollectionSize<uint32_t>(m_CodeRanges); |
| if (nSegs > 1) { |
| m_pCMap->m_CodingScheme = CPDF_CMap::MixedFourBytes; |
| m_pCMap->m_nCodeRanges = nSegs; |
| FX_Free(m_pCMap->m_pLeadingBytes); |
| m_pCMap->m_pLeadingBytes = |
| FX_Alloc2D(uint8_t, nSegs, sizeof(CMap_CodeRange)); |
| memcpy(m_pCMap->m_pLeadingBytes, m_CodeRanges.data(), |
| nSegs * sizeof(CMap_CodeRange)); |
| } else if (nSegs == 1) { |
| m_pCMap->m_CodingScheme = (m_CodeRanges[0].m_CharSize == 2) |
| ? CPDF_CMap::TwoBytes |
| : CPDF_CMap::OneByte; |
| } |
| m_Status = 0; |
| } else { |
| if (word.GetLength() == 0 || word.GetAt(0) != '<') { |
| return; |
| } |
| if (m_CodeSeq % 2) { |
| CMap_CodeRange range; |
| if (CMap_GetCodeRange(range, m_LastWord.AsStringC(), word)) |
| m_CodeRanges.push_back(range); |
| } |
| m_CodeSeq++; |
| } |
| } |
| m_LastWord = word; |
| } |
| |
| // Static. |
| uint32_t CPDF_CMapParser::CMap_GetCode(const CFX_ByteStringC& word) { |
| pdfium::base::CheckedNumeric<uint32_t> num = 0; |
| if (word.GetAt(0) == '<') { |
| for (int i = 1; i < word.GetLength() && std::isxdigit(word.GetAt(i)); ++i) { |
| num = num * 16 + FXSYS_HexCharToInt(word.GetAt(i)); |
| if (!num.IsValid()) |
| return 0; |
| } |
| return num.ValueOrDie(); |
| } |
| |
| for (int i = 0; i < word.GetLength() && std::isdigit(word.GetAt(i)); ++i) { |
| num = |
| num * 10 + FXSYS_DecimalCharToInt(static_cast<wchar_t>(word.GetAt(i))); |
| if (!num.IsValid()) |
| return 0; |
| } |
| return num.ValueOrDie(); |
| } |
| |
| // Static. |
| bool CPDF_CMapParser::CMap_GetCodeRange(CMap_CodeRange& range, |
| const CFX_ByteStringC& first, |
| const CFX_ByteStringC& second) { |
| if (first.GetLength() == 0 || first.GetAt(0) != '<') |
| return false; |
| |
| int i; |
| for (i = 1; i < first.GetLength(); ++i) { |
| if (first.GetAt(i) == '>') { |
| break; |
| } |
| } |
| range.m_CharSize = (i - 1) / 2; |
| if (range.m_CharSize > 4) |
| return false; |
| |
| for (i = 0; i < range.m_CharSize; ++i) { |
| uint8_t digit1 = first.GetAt(i * 2 + 1); |
| uint8_t digit2 = first.GetAt(i * 2 + 2); |
| range.m_Lower[i] = |
| FXSYS_HexCharToInt(digit1) * 16 + FXSYS_HexCharToInt(digit2); |
| } |
| |
| uint32_t size = second.GetLength(); |
| for (i = 0; i < range.m_CharSize; ++i) { |
| uint8_t digit1 = ((uint32_t)i * 2 + 1 < size) |
| ? second.GetAt((FX_STRSIZE)i * 2 + 1) |
| : '0'; |
| uint8_t digit2 = ((uint32_t)i * 2 + 2 < size) |
| ? second.GetAt((FX_STRSIZE)i * 2 + 2) |
| : '0'; |
| range.m_Upper[i] = |
| FXSYS_HexCharToInt(digit1) * 16 + FXSYS_HexCharToInt(digit2); |
| } |
| return true; |
| } |
| |
| CPDF_CMap::CPDF_CMap() { |
| m_Charset = CIDSET_UNKNOWN; |
| m_Coding = CIDCODING_UNKNOWN; |
| m_CodingScheme = TwoBytes; |
| m_bVertical = false; |
| m_bLoaded = false; |
| m_pMapping = nullptr; |
| m_pLeadingBytes = nullptr; |
| m_pAddMapping = nullptr; |
| m_pEmbedMap = nullptr; |
| m_nCodeRanges = 0; |
| } |
| CPDF_CMap::~CPDF_CMap() { |
| FX_Free(m_pMapping); |
| FX_Free(m_pAddMapping); |
| FX_Free(m_pLeadingBytes); |
| } |
| |
| bool CPDF_CMap::IsLoaded() const { |
| return m_bLoaded; |
| } |
| |
| bool CPDF_CMap::IsVertWriting() const { |
| return m_bVertical; |
| } |
| |
| void CPDF_CMap::LoadPredefined(CPDF_CMapManager* pMgr, |
| const CFX_ByteString& bsName, |
| bool bPromptCJK) { |
| m_PredefinedCMap = bsName; |
| if (m_PredefinedCMap == "Identity-H" || m_PredefinedCMap == "Identity-V") { |
| m_Coding = CIDCODING_CID; |
| m_bVertical = bsName[9] == 'V'; |
| m_bLoaded = true; |
| return; |
| } |
| CFX_ByteString cmapid = m_PredefinedCMap; |
| m_bVertical = cmapid.Right(1) == "V"; |
| if (cmapid.GetLength() > 2) { |
| cmapid = cmapid.Left(cmapid.GetLength() - 2); |
| } |
| const CPDF_PredefinedCMap* map = nullptr; |
| for (size_t i = 0; i < FX_ArraySize(g_PredefinedCMaps); ++i) { |
| if (cmapid == CFX_ByteStringC(g_PredefinedCMaps[i].m_pName)) { |
| map = &g_PredefinedCMaps[i]; |
| break; |
| } |
| } |
| if (!map) |
| return; |
| |
| m_Charset = map->m_Charset; |
| m_Coding = map->m_Coding; |
| m_CodingScheme = map->m_CodingScheme; |
| if (m_CodingScheme == MixedTwoBytes) { |
| m_pLeadingBytes = FX_Alloc(uint8_t, 256); |
| for (uint32_t i = 0; i < map->m_LeadingSegCount; ++i) { |
| const uint8_t* segs = map->m_LeadingSegs; |
| for (int b = segs[i * 2]; b <= segs[i * 2 + 1]; ++b) { |
| m_pLeadingBytes[b] = 1; |
| } |
| } |
| } |
| FPDFAPI_FindEmbeddedCMap(bsName, m_Charset, m_Coding, m_pEmbedMap); |
| if (!m_pEmbedMap) |
| return; |
| |
| m_bLoaded = true; |
| } |
| |
| void CPDF_CMap::LoadEmbedded(const uint8_t* pData, uint32_t size) { |
| m_pMapping = FX_Alloc(uint16_t, 65536); |
| CPDF_CMapParser parser; |
| parser.Initialize(this); |
| CPDF_SimpleParser syntax(pData, size); |
| while (1) { |
| CFX_ByteStringC word = syntax.GetWord(); |
| if (word.IsEmpty()) { |
| break; |
| } |
| parser.ParseWord(word); |
| } |
| if (m_CodingScheme == MixedFourBytes && parser.m_AddMaps.GetSize()) { |
| m_pAddMapping = FX_Alloc(uint8_t, parser.m_AddMaps.GetSize() + 4); |
| *(uint32_t*)m_pAddMapping = parser.m_AddMaps.GetSize() / 8; |
| memcpy(m_pAddMapping + 4, parser.m_AddMaps.GetBuffer(), |
| parser.m_AddMaps.GetSize()); |
| qsort(m_pAddMapping + 4, parser.m_AddMaps.GetSize() / 8, 8, CompareDWORD); |
| } |
| } |
| |
| uint16_t CPDF_CMap::CIDFromCharCode(uint32_t charcode) const { |
| if (m_Coding == CIDCODING_CID) { |
| return (uint16_t)charcode; |
| } |
| if (m_pEmbedMap) { |
| return FPDFAPI_CIDFromCharCode(m_pEmbedMap, charcode); |
| } |
| if (!m_pMapping) { |
| return (uint16_t)charcode; |
| } |
| if (charcode >> 16) { |
| if (m_pAddMapping) { |
| void* found = bsearch(&charcode, m_pAddMapping + 4, |
| *(uint32_t*)m_pAddMapping, 8, CompareCID); |
| if (!found) |
| return 0; |
| return (uint16_t)(((uint32_t*)found)[1] % 65536 + charcode - |
| *(uint32_t*)found); |
| } |
| return 0; |
| } |
| return m_pMapping[charcode]; |
| } |
| |
| uint32_t CPDF_CMap::GetNextChar(const char* pString, |
| int nStrLen, |
| int& offset) const { |
| switch (m_CodingScheme) { |
| case OneByte: |
| return ((uint8_t*)pString)[offset++]; |
| case TwoBytes: |
| offset += 2; |
| return ((uint8_t*)pString)[offset - 2] * 256 + |
| ((uint8_t*)pString)[offset - 1]; |
| case MixedTwoBytes: { |
| uint8_t byte1 = ((uint8_t*)pString)[offset++]; |
| if (!m_pLeadingBytes[byte1]) { |
| return byte1; |
| } |
| uint8_t byte2 = ((uint8_t*)pString)[offset++]; |
| return byte1 * 256 + byte2; |
| } |
| case MixedFourBytes: { |
| uint8_t codes[4]; |
| int char_size = 1; |
| codes[0] = ((uint8_t*)pString)[offset++]; |
| CMap_CodeRange* pRanges = (CMap_CodeRange*)m_pLeadingBytes; |
| while (1) { |
| int ret = CheckCodeRange(codes, char_size, pRanges, m_nCodeRanges); |
| if (ret == 0) { |
| return 0; |
| } |
| if (ret == 2) { |
| uint32_t charcode = 0; |
| for (int i = 0; i < char_size; i++) { |
| charcode = (charcode << 8) + codes[i]; |
| } |
| return charcode; |
| } |
| if (char_size == 4 || offset == nStrLen) { |
| return 0; |
| } |
| codes[char_size++] = ((uint8_t*)pString)[offset++]; |
| } |
| break; |
| } |
| } |
| return 0; |
| } |
| int CPDF_CMap::GetCharSize(uint32_t charcode) const { |
| switch (m_CodingScheme) { |
| case OneByte: |
| return 1; |
| case TwoBytes: |
| return 2; |
| case MixedTwoBytes: |
| case MixedFourBytes: |
| if (charcode < 0x100) { |
| return 1; |
| } |
| if (charcode < 0x10000) { |
| return 2; |
| } |
| if (charcode < 0x1000000) { |
| return 3; |
| } |
| return 4; |
| } |
| return 1; |
| } |
| int CPDF_CMap::CountChar(const char* pString, int size) const { |
| switch (m_CodingScheme) { |
| case OneByte: |
| return size; |
| case TwoBytes: |
| return (size + 1) / 2; |
| case MixedTwoBytes: { |
| int count = 0; |
| for (int i = 0; i < size; i++) { |
| count++; |
| if (m_pLeadingBytes[((uint8_t*)pString)[i]]) { |
| i++; |
| } |
| } |
| return count; |
| } |
| case MixedFourBytes: { |
| int count = 0, offset = 0; |
| while (offset < size) { |
| GetNextChar(pString, size, offset); |
| count++; |
| } |
| return count; |
| } |
| } |
| return size; |
| } |
| |
| int CPDF_CMap::AppendChar(char* str, uint32_t charcode) const { |
| switch (m_CodingScheme) { |
| case OneByte: |
| str[0] = (uint8_t)charcode; |
| return 1; |
| case TwoBytes: |
| str[0] = (uint8_t)(charcode / 256); |
| str[1] = (uint8_t)(charcode % 256); |
| return 2; |
| case MixedTwoBytes: |
| case MixedFourBytes: |
| if (charcode < 0x100) { |
| CMap_CodeRange* pRanges = (CMap_CodeRange*)m_pLeadingBytes; |
| int iSize = GetCharSizeImpl(charcode, pRanges, m_nCodeRanges); |
| if (iSize == 0) { |
| iSize = 1; |
| } |
| if (iSize > 1) { |
| memset(str, 0, sizeof(uint8_t) * iSize); |
| } |
| str[iSize - 1] = (uint8_t)charcode; |
| return iSize; |
| } |
| if (charcode < 0x10000) { |
| str[0] = (uint8_t)(charcode >> 8); |
| str[1] = (uint8_t)charcode; |
| return 2; |
| } |
| if (charcode < 0x1000000) { |
| str[0] = (uint8_t)(charcode >> 16); |
| str[1] = (uint8_t)(charcode >> 8); |
| str[2] = (uint8_t)charcode; |
| return 3; |
| } |
| str[0] = (uint8_t)(charcode >> 24); |
| str[1] = (uint8_t)(charcode >> 16); |
| str[2] = (uint8_t)(charcode >> 8); |
| str[3] = (uint8_t)charcode; |
| return 4; |
| } |
| return 0; |
| } |
| |
| CPDF_CID2UnicodeMap::CPDF_CID2UnicodeMap() { |
| m_EmbeddedCount = 0; |
| } |
| |
| CPDF_CID2UnicodeMap::~CPDF_CID2UnicodeMap() {} |
| |
| bool CPDF_CID2UnicodeMap::IsLoaded() { |
| return m_EmbeddedCount != 0; |
| } |
| |
| wchar_t CPDF_CID2UnicodeMap::UnicodeFromCID(uint16_t CID) { |
| if (m_Charset == CIDSET_UNICODE) { |
| return CID; |
| } |
| if (CID < m_EmbeddedCount) { |
| return m_pEmbeddedMap[CID]; |
| } |
| return 0; |
| } |
| |
| void CPDF_CID2UnicodeMap::Load(CPDF_CMapManager* pMgr, |
| CIDSet charset, |
| bool bPromptCJK) { |
| m_Charset = charset; |
| |
| CPDF_FontGlobals* pFontGlobals = |
| CPDF_ModuleMgr::Get()->GetPageModule()->GetFontGlobals(); |
| m_pEmbeddedMap = pFontGlobals->m_EmbeddedToUnicodes[charset].m_pMap; |
| m_EmbeddedCount = pFontGlobals->m_EmbeddedToUnicodes[charset].m_Count; |
| } |
| |
| CIDSet CharsetFromOrdering(const CFX_ByteStringC& ordering) { |
| for (size_t charset = 1; charset < FX_ArraySize(g_CharsetNames); ++charset) { |
| if (ordering == g_CharsetNames[charset]) |
| return CIDSetFromSizeT(charset); |
| } |
| return CIDSET_UNKNOWN; |
| } |
