| // Copyright 2016 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/cpdf_cidfont.h" |
| |
| #include <algorithm> |
| #include <limits> |
| #include <vector> |
| |
| #include "core/fpdfapi/cmaps/cmap_int.h" |
| #include "core/fpdfapi/cpdf_modulemgr.h" |
| #include "core/fpdfapi/font/cfx_cttgsubtable.h" |
| #include "core/fpdfapi/font/cpdf_cid2unicodemap.h" |
| #include "core/fpdfapi/font/cpdf_cmap.h" |
| #include "core/fpdfapi/font/cpdf_cmapparser.h" |
| #include "core/fpdfapi/font/cpdf_fontencoding.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_stream_acc.h" |
| #include "third_party/base/numerics/safe_math.h" |
| #include "third_party/base/ptr_util.h" |
| #include "third_party/base/span.h" |
| #include "third_party/base/stl_util.h" |
| |
| namespace { |
| |
| const uint16_t g_CharsetCPs[CIDSET_NUM_SETS] = {0, 936, 950, 932, 949, 1200}; |
| |
| const struct CIDTransform { |
| uint16_t cid; |
| uint8_t a; |
| uint8_t b; |
| uint8_t c; |
| uint8_t d; |
| uint8_t e; |
| uint8_t f; |
| } g_Japan1_VertCIDs[] = { |
| {97, 129, 0, 0, 127, 55, 0}, {7887, 127, 0, 0, 127, 76, 89}, |
| {7888, 127, 0, 0, 127, 79, 94}, {7889, 0, 129, 127, 0, 17, 127}, |
| {7890, 0, 129, 127, 0, 17, 127}, {7891, 0, 129, 127, 0, 17, 127}, |
| {7892, 0, 129, 127, 0, 17, 127}, {7893, 0, 129, 127, 0, 17, 127}, |
| {7894, 0, 129, 127, 0, 17, 127}, {7895, 0, 129, 127, 0, 17, 127}, |
| {7896, 0, 129, 127, 0, 17, 127}, {7897, 0, 129, 127, 0, 17, 127}, |
| {7898, 0, 129, 127, 0, 17, 127}, {7899, 0, 129, 127, 0, 17, 104}, |
| {7900, 0, 129, 127, 0, 17, 127}, {7901, 0, 129, 127, 0, 17, 104}, |
| {7902, 0, 129, 127, 0, 17, 127}, {7903, 0, 129, 127, 0, 17, 127}, |
| {7904, 0, 129, 127, 0, 17, 127}, {7905, 0, 129, 127, 0, 17, 114}, |
| {7906, 0, 129, 127, 0, 17, 127}, {7907, 0, 129, 127, 0, 17, 127}, |
| {7908, 0, 129, 127, 0, 17, 127}, {7909, 0, 129, 127, 0, 17, 127}, |
| {7910, 0, 129, 127, 0, 17, 127}, {7911, 0, 129, 127, 0, 17, 127}, |
| {7912, 0, 129, 127, 0, 17, 127}, {7913, 0, 129, 127, 0, 17, 127}, |
| {7914, 0, 129, 127, 0, 17, 127}, {7915, 0, 129, 127, 0, 17, 114}, |
| {7916, 0, 129, 127, 0, 17, 127}, {7917, 0, 129, 127, 0, 17, 127}, |
| {7918, 127, 0, 0, 127, 18, 25}, {7919, 127, 0, 0, 127, 18, 25}, |
| {7920, 127, 0, 0, 127, 18, 25}, {7921, 127, 0, 0, 127, 18, 25}, |
| {7922, 127, 0, 0, 127, 18, 25}, {7923, 127, 0, 0, 127, 18, 25}, |
| {7924, 127, 0, 0, 127, 18, 25}, {7925, 127, 0, 0, 127, 18, 25}, |
| {7926, 127, 0, 0, 127, 18, 25}, {7927, 127, 0, 0, 127, 18, 25}, |
| {7928, 127, 0, 0, 127, 18, 25}, {7929, 127, 0, 0, 127, 18, 25}, |
| {7930, 127, 0, 0, 127, 18, 25}, {7931, 127, 0, 0, 127, 18, 25}, |
| {7932, 127, 0, 0, 127, 18, 25}, {7933, 127, 0, 0, 127, 18, 25}, |
| {7934, 127, 0, 0, 127, 18, 25}, {7935, 127, 0, 0, 127, 18, 25}, |
| {7936, 127, 0, 0, 127, 18, 25}, {7937, 127, 0, 0, 127, 18, 25}, |
| {7938, 127, 0, 0, 127, 18, 25}, {7939, 127, 0, 0, 127, 18, 25}, |
| {8720, 0, 129, 127, 0, 19, 102}, {8721, 0, 129, 127, 0, 13, 127}, |
| {8722, 0, 129, 127, 0, 19, 108}, {8723, 0, 129, 127, 0, 19, 102}, |
| {8724, 0, 129, 127, 0, 19, 102}, {8725, 0, 129, 127, 0, 19, 102}, |
| {8726, 0, 129, 127, 0, 19, 102}, {8727, 0, 129, 127, 0, 19, 102}, |
| {8728, 0, 129, 127, 0, 19, 114}, {8729, 0, 129, 127, 0, 19, 114}, |
| {8730, 0, 129, 127, 0, 38, 108}, {8731, 0, 129, 127, 0, 13, 108}, |
| {8732, 0, 129, 127, 0, 19, 108}, {8733, 0, 129, 127, 0, 19, 108}, |
| {8734, 0, 129, 127, 0, 19, 108}, {8735, 0, 129, 127, 0, 19, 108}, |
| {8736, 0, 129, 127, 0, 19, 102}, {8737, 0, 129, 127, 0, 19, 102}, |
| {8738, 0, 129, 127, 0, 19, 102}, {8739, 0, 129, 127, 0, 19, 102}, |
| {8740, 0, 129, 127, 0, 19, 102}, {8741, 0, 129, 127, 0, 19, 102}, |
| {8742, 0, 129, 127, 0, 19, 102}, {8743, 0, 129, 127, 0, 19, 102}, |
| {8744, 0, 129, 127, 0, 19, 102}, {8745, 0, 129, 127, 0, 19, 102}, |
| {8746, 0, 129, 127, 0, 19, 114}, {8747, 0, 129, 127, 0, 19, 114}, |
| {8748, 0, 129, 127, 0, 19, 102}, {8749, 0, 129, 127, 0, 19, 102}, |
| {8750, 0, 129, 127, 0, 19, 102}, {8751, 0, 129, 127, 0, 19, 102}, |
| {8752, 0, 129, 127, 0, 19, 102}, {8753, 0, 129, 127, 0, 19, 102}, |
| {8754, 0, 129, 127, 0, 19, 102}, {8755, 0, 129, 127, 0, 19, 102}, |
| {8756, 0, 129, 127, 0, 19, 102}, {8757, 0, 129, 127, 0, 19, 102}, |
| {8758, 0, 129, 127, 0, 19, 102}, {8759, 0, 129, 127, 0, 19, 102}, |
| {8760, 0, 129, 127, 0, 19, 102}, {8761, 0, 129, 127, 0, 19, 102}, |
| {8762, 0, 129, 127, 0, 19, 102}, {8763, 0, 129, 127, 0, 19, 102}, |
| {8764, 0, 129, 127, 0, 19, 102}, {8765, 0, 129, 127, 0, 19, 102}, |
| {8766, 0, 129, 127, 0, 19, 102}, {8767, 0, 129, 127, 0, 19, 102}, |
| {8768, 0, 129, 127, 0, 19, 102}, {8769, 0, 129, 127, 0, 19, 102}, |
| {8770, 0, 129, 127, 0, 19, 102}, {8771, 0, 129, 127, 0, 19, 102}, |
| {8772, 0, 129, 127, 0, 19, 102}, {8773, 0, 129, 127, 0, 19, 102}, |
| {8774, 0, 129, 127, 0, 19, 102}, {8775, 0, 129, 127, 0, 19, 102}, |
| {8776, 0, 129, 127, 0, 19, 102}, {8777, 0, 129, 127, 0, 19, 102}, |
| {8778, 0, 129, 127, 0, 19, 102}, {8779, 0, 129, 127, 0, 19, 114}, |
| {8780, 0, 129, 127, 0, 19, 108}, {8781, 0, 129, 127, 0, 19, 114}, |
| {8782, 0, 129, 127, 0, 13, 114}, {8783, 0, 129, 127, 0, 19, 108}, |
| {8784, 0, 129, 127, 0, 13, 114}, {8785, 0, 129, 127, 0, 19, 108}, |
| {8786, 0, 129, 127, 0, 19, 108}, {8787, 0, 129, 127, 0, 19, 108}, |
| {8788, 0, 129, 127, 0, 19, 108}, {8789, 0, 129, 127, 0, 19, 108}, |
| {8790, 0, 129, 127, 0, 19, 108}, {8791, 0, 129, 127, 0, 19, 108}, |
| {8792, 0, 129, 127, 0, 19, 108}, {8793, 0, 129, 127, 0, 19, 108}, |
| {8794, 0, 129, 127, 0, 19, 108}, {8795, 0, 129, 127, 0, 19, 108}, |
| {8796, 0, 129, 127, 0, 19, 108}, {8797, 0, 129, 127, 0, 19, 108}, |
| {8798, 0, 129, 127, 0, 19, 108}, {8799, 0, 129, 127, 0, 19, 108}, |
| {8800, 0, 129, 127, 0, 19, 108}, {8801, 0, 129, 127, 0, 19, 108}, |
| {8802, 0, 129, 127, 0, 19, 108}, {8803, 0, 129, 127, 0, 19, 108}, |
| {8804, 0, 129, 127, 0, 19, 108}, {8805, 0, 129, 127, 0, 19, 108}, |
| {8806, 0, 129, 127, 0, 19, 108}, {8807, 0, 129, 127, 0, 19, 108}, |
| {8808, 0, 129, 127, 0, 19, 108}, {8809, 0, 129, 127, 0, 19, 108}, |
| {8810, 0, 129, 127, 0, 19, 108}, {8811, 0, 129, 127, 0, 19, 114}, |
| {8812, 0, 129, 127, 0, 19, 102}, {8813, 0, 129, 127, 0, 19, 114}, |
| {8814, 0, 129, 127, 0, 76, 102}, {8815, 0, 129, 127, 0, 13, 121}, |
| {8816, 0, 129, 127, 0, 19, 114}, {8817, 0, 129, 127, 0, 19, 127}, |
| {8818, 0, 129, 127, 0, 19, 114}, {8819, 0, 129, 127, 0, 218, 108}, |
| }; |
| |
| // Boundary values to avoid integer overflow when multiplied by 1000. |
| constexpr long kMinCBox = -2147483; |
| constexpr long kMaxCBox = 2147483; |
| |
| // Boundary value to avoid integer overflow when adding 1/64th of the value. |
| constexpr int kMaxRectTop = 2114445437; |
| |
| CPDF_FontGlobals* GetFontGlobals() { |
| return CPDF_ModuleMgr::Get()->GetPageModule()->GetFontGlobals(); |
| } |
| |
| #if _FX_PLATFORM_ != _FX_PLATFORM_WINDOWS_ |
| |
| bool IsValidEmbeddedCharcodeFromUnicodeCharset(CIDSet charset) { |
| switch (charset) { |
| case CIDSET_GB1: |
| case CIDSET_CNS1: |
| case CIDSET_JAPAN1: |
| case CIDSET_KOREA1: |
| return true; |
| |
| default: |
| return false; |
| } |
| } |
| |
| wchar_t EmbeddedUnicodeFromCharcode(const FXCMAP_CMap* pEmbedMap, |
| CIDSet charset, |
| uint32_t charcode) { |
| if (!IsValidEmbeddedCharcodeFromUnicodeCharset(charset)) |
| return 0; |
| |
| uint16_t cid = CIDFromCharCode(pEmbedMap, charcode); |
| if (!cid) |
| return 0; |
| |
| pdfium::span<const uint16_t> map = |
| GetFontGlobals()->GetEmbeddedToUnicode(charset); |
| return cid < map.size() ? map[cid] : 0; |
| } |
| |
| uint32_t EmbeddedCharcodeFromUnicode(const FXCMAP_CMap* pEmbedMap, |
| CIDSet charset, |
| wchar_t unicode) { |
| if (!IsValidEmbeddedCharcodeFromUnicodeCharset(charset)) |
| return 0; |
| |
| pdfium::span<const uint16_t> map = |
| GetFontGlobals()->GetEmbeddedToUnicode(charset); |
| for (uint32_t i = 0; i < map.size(); ++i) { |
| if (map[i] == unicode) { |
| uint32_t charCode = CharCodeFromCID(pEmbedMap, i); |
| if (charCode) |
| return charCode; |
| } |
| } |
| return 0; |
| } |
| |
| #endif // _FX_PLATFORM_ != _FX_PLATFORM_WINDOWS_ |
| |
| void FT_UseCIDCharmap(FXFT_Face face, int coding) { |
| int encoding; |
| switch (coding) { |
| case CIDCODING_GB: |
| encoding = FXFT_ENCODING_GB2312; |
| break; |
| case CIDCODING_BIG5: |
| encoding = FXFT_ENCODING_BIG5; |
| break; |
| case CIDCODING_JIS: |
| encoding = FXFT_ENCODING_SJIS; |
| break; |
| case CIDCODING_KOREA: |
| encoding = FXFT_ENCODING_JOHAB; |
| break; |
| default: |
| encoding = FXFT_ENCODING_UNICODE; |
| } |
| int err = FXFT_Select_Charmap(face, encoding); |
| if (err) |
| err = FXFT_Select_Charmap(face, FXFT_ENCODING_UNICODE); |
| if (err && FXFT_Get_Face_Charmaps(face)) |
| FXFT_Set_Charmap(face, *FXFT_Get_Face_Charmaps(face)); |
| } |
| |
| bool IsMetricForCID(const uint32_t* pEntry, uint16_t CID) { |
| return pEntry[0] <= CID && pEntry[1] >= CID; |
| } |
| |
| } // namespace |
| |
| CPDF_CIDFont::CPDF_CIDFont(CPDF_Document* pDocument, CPDF_Dictionary* pFontDict) |
| : CPDF_Font(pDocument, pFontDict) { |
| for (size_t i = 0; i < FX_ArraySize(m_CharBBox); ++i) |
| m_CharBBox[i] = FX_RECT(-1, -1, -1, -1); |
| } |
| |
| CPDF_CIDFont::~CPDF_CIDFont() {} |
| |
| bool CPDF_CIDFont::IsCIDFont() const { |
| return true; |
| } |
| |
| const CPDF_CIDFont* CPDF_CIDFont::AsCIDFont() const { |
| return this; |
| } |
| |
| CPDF_CIDFont* CPDF_CIDFont::AsCIDFont() { |
| return this; |
| } |
| |
| uint16_t CPDF_CIDFont::CIDFromCharCode(uint32_t charcode) const { |
| return m_pCMap ? m_pCMap->CIDFromCharCode(charcode) |
| : static_cast<uint16_t>(charcode); |
| } |
| |
| bool CPDF_CIDFont::IsVertWriting() const { |
| return m_pCMap && m_pCMap->IsVertWriting(); |
| } |
| |
| WideString CPDF_CIDFont::UnicodeFromCharCode(uint32_t charcode) const { |
| WideString str = CPDF_Font::UnicodeFromCharCode(charcode); |
| if (!str.IsEmpty()) |
| return str; |
| wchar_t ret = GetUnicodeFromCharCode(charcode); |
| return ret ? ret : WideString(); |
| } |
| |
| wchar_t CPDF_CIDFont::GetUnicodeFromCharCode(uint32_t charcode) const { |
| switch (m_pCMap->GetCoding()) { |
| case CIDCODING_UCS2: |
| case CIDCODING_UTF16: |
| return static_cast<wchar_t>(charcode); |
| case CIDCODING_CID: |
| if (!m_pCID2UnicodeMap || !m_pCID2UnicodeMap->IsLoaded()) |
| return 0; |
| return m_pCID2UnicodeMap->UnicodeFromCID(static_cast<uint16_t>(charcode)); |
| } |
| if (m_pCID2UnicodeMap && m_pCID2UnicodeMap->IsLoaded() && m_pCMap->IsLoaded()) |
| return m_pCID2UnicodeMap->UnicodeFromCID(CIDFromCharCode(charcode)); |
| |
| #if _FX_PLATFORM_ == _FX_PLATFORM_WINDOWS_ |
| wchar_t unicode; |
| int charsize = 1; |
| if (charcode > 255) { |
| charcode = (charcode % 256) * 256 + (charcode / 256); |
| charsize = 2; |
| } |
| int ret = FXSYS_MultiByteToWideChar(g_CharsetCPs[m_pCMap->GetCoding()], 0, |
| reinterpret_cast<const char*>(&charcode), |
| charsize, &unicode, 1); |
| return ret == 1 ? unicode : 0; |
| #else |
| if (!m_pCMap->GetEmbedMap()) |
| return 0; |
| return EmbeddedUnicodeFromCharcode(m_pCMap->GetEmbedMap(), |
| m_pCMap->GetCharset(), charcode); |
| #endif |
| } |
| |
| uint32_t CPDF_CIDFont::CharCodeFromUnicode(wchar_t unicode) const { |
| uint32_t charcode = CPDF_Font::CharCodeFromUnicode(unicode); |
| if (charcode) |
| return charcode; |
| switch (m_pCMap->GetCoding()) { |
| case CIDCODING_UNKNOWN: |
| return 0; |
| case CIDCODING_UCS2: |
| case CIDCODING_UTF16: |
| return unicode; |
| case CIDCODING_CID: { |
| if (!m_pCID2UnicodeMap || !m_pCID2UnicodeMap->IsLoaded()) |
| return 0; |
| uint32_t CID = 0; |
| while (CID < 65536) { |
| wchar_t this_unicode = |
| m_pCID2UnicodeMap->UnicodeFromCID(static_cast<uint16_t>(CID)); |
| if (this_unicode == unicode) |
| return CID; |
| CID++; |
| } |
| break; |
| } |
| } |
| |
| if (unicode < 0x80) |
| return static_cast<uint32_t>(unicode); |
| if (m_pCMap->GetCoding() == CIDCODING_CID) |
| return 0; |
| #if _FX_PLATFORM_ == _FX_PLATFORM_WINDOWS_ |
| uint8_t buffer[32]; |
| int ret = FXSYS_WideCharToMultiByte( |
| g_CharsetCPs[m_pCMap->GetCoding()], 0, &unicode, 1, |
| reinterpret_cast<char*>(buffer), 4, nullptr, nullptr); |
| if (ret == 1) |
| return buffer[0]; |
| if (ret == 2) |
| return buffer[0] * 256 + buffer[1]; |
| #else |
| if (m_pCMap->GetEmbedMap()) { |
| return EmbeddedCharcodeFromUnicode(m_pCMap->GetEmbedMap(), |
| m_pCMap->GetCharset(), unicode); |
| } |
| #endif |
| return 0; |
| } |
| |
| bool CPDF_CIDFont::Load() { |
| if (m_pFontDict->GetStringFor("Subtype") == "TrueType") { |
| LoadGB2312(); |
| return true; |
| } |
| |
| const CPDF_Array* pFonts = m_pFontDict->GetArrayFor("DescendantFonts"); |
| if (!pFonts || pFonts->size() != 1) |
| return false; |
| |
| const CPDF_Dictionary* pCIDFontDict = pFonts->GetDictAt(0); |
| if (!pCIDFontDict) |
| return false; |
| |
| m_BaseFont = pCIDFontDict->GetStringFor("BaseFont"); |
| if ((m_BaseFont.Compare("CourierStd") == 0 || |
| m_BaseFont.Compare("CourierStd-Bold") == 0 || |
| m_BaseFont.Compare("CourierStd-BoldOblique") == 0 || |
| m_BaseFont.Compare("CourierStd-Oblique") == 0) && |
| !IsEmbedded()) { |
| m_bAdobeCourierStd = true; |
| } |
| const CPDF_Dictionary* pFontDesc = pCIDFontDict->GetDictFor("FontDescriptor"); |
| if (pFontDesc) |
| LoadFontDescriptor(pFontDesc); |
| |
| CPDF_Object* pEncoding = m_pFontDict->GetDirectObjectFor("Encoding"); |
| if (!pEncoding) |
| return false; |
| |
| ByteString subtype = pCIDFontDict->GetStringFor("Subtype"); |
| m_bType1 = (subtype == "CIDFontType0"); |
| |
| CPDF_CMapManager* manager = GetFontGlobals()->GetCMapManager(); |
| if (pEncoding->IsName()) { |
| ByteString cmap = pEncoding->GetString(); |
| m_pCMap = manager->GetPredefinedCMap(cmap); |
| if (!m_pCMap) |
| return false; |
| } else if (CPDF_Stream* pStream = pEncoding->AsStream()) { |
| auto pAcc = pdfium::MakeRetain<CPDF_StreamAcc>(pStream); |
| pAcc->LoadAllDataFiltered(); |
| m_pCMap = pdfium::MakeRetain<CPDF_CMap>(); |
| m_pCMap->LoadEmbedded(pAcc->GetSpan()); |
| } else { |
| return false; |
| } |
| |
| m_Charset = m_pCMap->GetCharset(); |
| if (m_Charset == CIDSET_UNKNOWN) { |
| const CPDF_Dictionary* pCIDInfo = pCIDFontDict->GetDictFor("CIDSystemInfo"); |
| if (pCIDInfo) { |
| m_Charset = CPDF_CMapParser::CharsetFromOrdering( |
| pCIDInfo->GetStringFor("Ordering").AsStringView()); |
| } |
| } |
| if (m_Charset != CIDSET_UNKNOWN) { |
| m_pCID2UnicodeMap = manager->GetCID2UnicodeMap(m_Charset); |
| } |
| if (m_Font.GetFace()) { |
| if (m_bType1) |
| FXFT_Select_Charmap(m_Font.GetFace(), FXFT_ENCODING_UNICODE); |
| else |
| FT_UseCIDCharmap(m_Font.GetFace(), m_pCMap->GetCoding()); |
| } |
| m_DefaultWidth = pCIDFontDict->GetIntegerFor("DW", 1000); |
| const CPDF_Array* pWidthArray = pCIDFontDict->GetArrayFor("W"); |
| if (pWidthArray) |
| LoadMetricsArray(pWidthArray, &m_WidthList, 1); |
| if (!IsEmbedded()) |
| LoadSubstFont(); |
| |
| const CPDF_Object* pmap = pCIDFontDict->GetDirectObjectFor("CIDToGIDMap"); |
| if (pmap) { |
| if (const CPDF_Stream* pStream = pmap->AsStream()) { |
| m_pStreamAcc = pdfium::MakeRetain<CPDF_StreamAcc>(pStream); |
| m_pStreamAcc->LoadAllDataFiltered(); |
| } else if (m_pFontFile && pmap->GetString() == "Identity") { |
| m_bCIDIsGID = true; |
| } |
| } |
| |
| CheckFontMetrics(); |
| if (IsVertWriting()) { |
| pWidthArray = pCIDFontDict->GetArrayFor("W2"); |
| if (pWidthArray) |
| LoadMetricsArray(pWidthArray, &m_VertMetrics, 3); |
| const CPDF_Array* pDefaultArray = pCIDFontDict->GetArrayFor("DW2"); |
| if (pDefaultArray) { |
| m_DefaultVY = pDefaultArray->GetIntegerAt(0); |
| m_DefaultW1 = pDefaultArray->GetIntegerAt(1); |
| } |
| } |
| return true; |
| } |
| |
| FX_RECT CPDF_CIDFont::GetCharBBox(uint32_t charcode) { |
| if (charcode < 256 && m_CharBBox[charcode].right != -1) |
| return m_CharBBox[charcode]; |
| |
| FX_RECT rect; |
| bool bVert = false; |
| int glyph_index = GlyphFromCharCode(charcode, &bVert); |
| FXFT_Face face = m_Font.GetFace(); |
| if (face) { |
| if (FXFT_Is_Face_Tricky(face)) { |
| int err = FXFT_Load_Glyph(face, glyph_index, |
| FXFT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH); |
| if (!err) { |
| FXFT_Glyph glyph; |
| err = FXFT_Get_Glyph(((FXFT_Face)face)->glyph, &glyph); |
| if (!err) { |
| FXFT_BBox cbox; |
| FXFT_Glyph_Get_CBox(glyph, FXFT_GLYPH_BBOX_PIXELS, &cbox); |
| cbox.xMin = pdfium::clamp(cbox.xMin, kMinCBox, kMaxCBox); |
| cbox.xMax = pdfium::clamp(cbox.xMax, kMinCBox, kMaxCBox); |
| cbox.yMin = pdfium::clamp(cbox.yMin, kMinCBox, kMaxCBox); |
| cbox.yMax = pdfium::clamp(cbox.yMax, kMinCBox, kMaxCBox); |
| int pixel_size_x = ((FXFT_Face)face)->size->metrics.x_ppem; |
| int pixel_size_y = ((FXFT_Face)face)->size->metrics.y_ppem; |
| if (pixel_size_x == 0 || pixel_size_y == 0) { |
| rect = FX_RECT(cbox.xMin, cbox.yMax, cbox.xMax, cbox.yMin); |
| } else { |
| rect = FX_RECT(cbox.xMin * 1000 / pixel_size_x, |
| cbox.yMax * 1000 / pixel_size_y, |
| cbox.xMax * 1000 / pixel_size_x, |
| cbox.yMin * 1000 / pixel_size_y); |
| } |
| rect.top = std::min(rect.top, |
| static_cast<int>(FXFT_Get_Face_Ascender(face))); |
| rect.bottom = std::max( |
| rect.bottom, static_cast<int>(FXFT_Get_Face_Descender(face))); |
| FXFT_Done_Glyph(glyph); |
| } |
| } |
| } else { |
| int err = FXFT_Load_Glyph(face, glyph_index, FXFT_LOAD_NO_SCALE); |
| if (err == 0) { |
| rect = FX_RECT(TT2PDF(FXFT_Get_Glyph_HoriBearingX(face), face), |
| TT2PDF(FXFT_Get_Glyph_HoriBearingY(face), face), |
| TT2PDF(FXFT_Get_Glyph_HoriBearingX(face) + |
| FXFT_Get_Glyph_Width(face), |
| face), |
| TT2PDF(FXFT_Get_Glyph_HoriBearingY(face) - |
| FXFT_Get_Glyph_Height(face), |
| face)); |
| if (rect.top <= kMaxRectTop) |
| rect.top += rect.top / 64; |
| else |
| rect.top = std::numeric_limits<int>::max(); |
| } |
| } |
| } |
| if (!m_pFontFile && m_Charset == CIDSET_JAPAN1) { |
| uint16_t CID = CIDFromCharCode(charcode); |
| const uint8_t* pTransform = GetCIDTransform(CID); |
| if (pTransform && !bVert) { |
| CFX_Matrix matrix(CIDTransformToFloat(pTransform[0]), |
| CIDTransformToFloat(pTransform[1]), |
| CIDTransformToFloat(pTransform[2]), |
| CIDTransformToFloat(pTransform[3]), |
| CIDTransformToFloat(pTransform[4]) * 1000, |
| CIDTransformToFloat(pTransform[5]) * 1000); |
| rect = matrix.TransformRect(CFX_FloatRect(rect)).GetOuterRect(); |
| } |
| } |
| if (charcode < 256) |
| m_CharBBox[charcode] = rect; |
| |
| return rect; |
| } |
| |
| uint32_t CPDF_CIDFont::GetCharWidthF(uint32_t charcode) { |
| if (charcode < 0x80 && m_bAnsiWidthsFixed) |
| return (charcode >= 32 && charcode < 127) ? 500 : 0; |
| |
| uint16_t cid = CIDFromCharCode(charcode); |
| size_t size = m_WidthList.size(); |
| const uint32_t* pList = m_WidthList.data(); |
| for (size_t i = 0; i < size; i += 3) { |
| const uint32_t* pEntry = pList + i; |
| if (IsMetricForCID(pEntry, cid)) |
| return pEntry[2]; |
| } |
| return m_DefaultWidth; |
| } |
| |
| short CPDF_CIDFont::GetVertWidth(uint16_t CID) const { |
| size_t vertsize = m_VertMetrics.size() / 5; |
| if (vertsize) { |
| const uint32_t* pTable = m_VertMetrics.data(); |
| for (size_t i = 0; i < vertsize; i++) { |
| const uint32_t* pEntry = pTable + (i * 5); |
| if (IsMetricForCID(pEntry, CID)) |
| return static_cast<short>(pEntry[2]); |
| } |
| } |
| return m_DefaultW1; |
| } |
| |
| void CPDF_CIDFont::GetVertOrigin(uint16_t CID, short& vx, short& vy) const { |
| size_t vertsize = m_VertMetrics.size() / 5; |
| if (vertsize) { |
| const uint32_t* pTable = m_VertMetrics.data(); |
| for (size_t i = 0; i < vertsize; i++) { |
| const uint32_t* pEntry = pTable + (i * 5); |
| if (IsMetricForCID(pEntry, CID)) { |
| vx = static_cast<short>(pEntry[3]); |
| vy = static_cast<short>(pEntry[4]); |
| return; |
| } |
| } |
| } |
| uint32_t dwWidth = m_DefaultWidth; |
| size_t size = m_WidthList.size(); |
| const uint32_t* pList = m_WidthList.data(); |
| for (size_t i = 0; i < size; i += 3) { |
| const uint32_t* pEntry = pList + i; |
| if (IsMetricForCID(pEntry, CID)) { |
| dwWidth = pEntry[2]; |
| break; |
| } |
| } |
| vx = static_cast<short>(dwWidth) / 2; |
| vy = m_DefaultVY; |
| } |
| |
| int CPDF_CIDFont::GetGlyphIndex(uint32_t unicode, bool* pVertGlyph) { |
| if (pVertGlyph) |
| *pVertGlyph = false; |
| |
| FXFT_Face face = m_Font.GetFace(); |
| int index = FXFT_Get_Char_Index(face, unicode); |
| if (unicode == 0x2502) |
| return index; |
| |
| if (!index || !IsVertWriting()) |
| return index; |
| |
| if (m_pTTGSUBTable) |
| return GetVerticalGlyph(index, pVertGlyph); |
| |
| if (!m_Font.GetSubData()) { |
| unsigned long length = 0; |
| int error = FXFT_Load_Sfnt_Table(face, FT_MAKE_TAG('G', 'S', 'U', 'B'), 0, |
| nullptr, &length); |
| if (!error) |
| m_Font.SetSubData(FX_Alloc(uint8_t, length)); |
| } |
| int error = FXFT_Load_Sfnt_Table(face, FT_MAKE_TAG('G', 'S', 'U', 'B'), 0, |
| m_Font.GetSubData(), nullptr); |
| if (error || !m_Font.GetSubData()) |
| return index; |
| |
| m_pTTGSUBTable = pdfium::MakeUnique<CFX_CTTGSUBTable>(m_Font.GetSubData()); |
| return GetVerticalGlyph(index, pVertGlyph); |
| } |
| |
| int CPDF_CIDFont::GetVerticalGlyph(int index, bool* pVertGlyph) { |
| uint32_t vindex = m_pTTGSUBTable->GetVerticalGlyph(index); |
| if (!vindex) |
| return index; |
| |
| index = vindex; |
| if (pVertGlyph) |
| *pVertGlyph = true; |
| return index; |
| } |
| |
| int CPDF_CIDFont::GlyphFromCharCode(uint32_t charcode, bool* pVertGlyph) { |
| if (pVertGlyph) |
| *pVertGlyph = false; |
| |
| if (!m_pFontFile && !m_pStreamAcc) { |
| uint16_t cid = CIDFromCharCode(charcode); |
| wchar_t unicode = 0; |
| if (m_bCIDIsGID) { |
| #if _FX_PLATFORM_ != _FX_PLATFORM_APPLE_ |
| return cid; |
| #else |
| if (FontStyleIsSymbolic(m_Flags)) |
| return cid; |
| |
| WideString uni_str = UnicodeFromCharCode(charcode); |
| if (uni_str.IsEmpty()) |
| return cid; |
| |
| unicode = uni_str[0]; |
| #endif |
| } else { |
| if (cid && m_pCID2UnicodeMap && m_pCID2UnicodeMap->IsLoaded()) |
| unicode = m_pCID2UnicodeMap->UnicodeFromCID(cid); |
| if (unicode == 0) |
| unicode = GetUnicodeFromCharCode(charcode); |
| if (unicode == 0) { |
| WideString unicode_str = UnicodeFromCharCode(charcode); |
| if (!unicode_str.IsEmpty()) |
| unicode = unicode_str[0]; |
| } |
| } |
| FXFT_Face face = m_Font.GetFace(); |
| if (unicode == 0) { |
| if (!m_bAdobeCourierStd) |
| return charcode ? static_cast<int>(charcode) : -1; |
| |
| charcode += 31; |
| bool bMSUnicode = FT_UseTTCharmap(face, 3, 1); |
| bool bMacRoman = !bMSUnicode && FT_UseTTCharmap(face, 1, 0); |
| int iBaseEncoding = PDFFONT_ENCODING_STANDARD; |
| if (bMSUnicode) |
| iBaseEncoding = PDFFONT_ENCODING_WINANSI; |
| else if (bMacRoman) |
| iBaseEncoding = PDFFONT_ENCODING_MACROMAN; |
| const char* name = |
| GetAdobeCharName(iBaseEncoding, std::vector<ByteString>(), charcode); |
| if (!name) |
| return charcode ? static_cast<int>(charcode) : -1; |
| |
| int index = 0; |
| uint16_t name_unicode = PDF_UnicodeFromAdobeName(name); |
| if (!name_unicode) |
| return charcode ? static_cast<int>(charcode) : -1; |
| |
| if (iBaseEncoding == PDFFONT_ENCODING_STANDARD) |
| return FXFT_Get_Char_Index(face, name_unicode); |
| |
| if (iBaseEncoding == PDFFONT_ENCODING_WINANSI) { |
| index = FXFT_Get_Char_Index(face, name_unicode); |
| } else { |
| ASSERT(iBaseEncoding == PDFFONT_ENCODING_MACROMAN); |
| uint32_t maccode = |
| FT_CharCodeFromUnicode(FXFT_ENCODING_APPLE_ROMAN, name_unicode); |
| index = maccode ? FXFT_Get_Char_Index(face, maccode) |
| : FXFT_Get_Name_Index(face, name); |
| } |
| if (index == 0 || index == 0xffff) |
| return charcode ? static_cast<int>(charcode) : -1; |
| return index; |
| } |
| if (m_Charset == CIDSET_JAPAN1) { |
| if (unicode == '\\') { |
| unicode = '/'; |
| #if _FX_PLATFORM_ != _FX_PLATFORM_APPLE_ |
| } else if (unicode == 0xa5) { |
| unicode = 0x5c; |
| #endif |
| } |
| } |
| if (!face) |
| return unicode; |
| |
| int err = FXFT_Select_Charmap(face, FXFT_ENCODING_UNICODE); |
| if (err) { |
| int i; |
| for (i = 0; i < FXFT_Get_Face_CharmapCount(face); i++) { |
| uint32_t ret = FT_CharCodeFromUnicode( |
| FXFT_Get_Charmap_Encoding(FXFT_Get_Face_Charmaps(face)[i]), |
| static_cast<wchar_t>(charcode)); |
| if (ret == 0) |
| continue; |
| FXFT_Set_Charmap(face, FXFT_Get_Face_Charmaps(face)[i]); |
| unicode = static_cast<wchar_t>(ret); |
| break; |
| } |
| if (i == FXFT_Get_Face_CharmapCount(face) && i) { |
| FXFT_Set_Charmap(face, FXFT_Get_Face_Charmaps(face)[0]); |
| unicode = static_cast<wchar_t>(charcode); |
| } |
| } |
| if (FXFT_Get_Face_Charmap(face)) { |
| int index = GetGlyphIndex(unicode, pVertGlyph); |
| return index != 0 ? index : -1; |
| } |
| return unicode; |
| } |
| |
| if (!m_Font.GetFace()) |
| return -1; |
| |
| uint16_t cid = CIDFromCharCode(charcode); |
| if (!m_pStreamAcc) { |
| if (m_bType1) |
| return cid; |
| if (m_pFontFile && m_pCMap->IsDirectCharcodeToCIDTableIsEmpty()) |
| return cid; |
| if (m_pCMap->GetCoding() == CIDCODING_UNKNOWN || |
| !FXFT_Get_Face_Charmap(m_Font.GetFace())) { |
| return cid; |
| } |
| if (FXFT_Get_Charmap_Encoding(FXFT_Get_Face_Charmap(m_Font.GetFace())) == |
| FXFT_ENCODING_UNICODE) { |
| WideString unicode_str = UnicodeFromCharCode(charcode); |
| if (unicode_str.IsEmpty()) |
| return -1; |
| |
| charcode = unicode_str[0]; |
| } |
| return GetGlyphIndex(charcode, pVertGlyph); |
| } |
| uint32_t byte_pos = cid * 2; |
| if (byte_pos + 2 > m_pStreamAcc->GetSize()) |
| return -1; |
| |
| const uint8_t* pdata = m_pStreamAcc->GetData() + byte_pos; |
| return pdata[0] * 256 + pdata[1]; |
| } |
| |
| uint32_t CPDF_CIDFont::GetNextChar(ByteStringView pString, |
| size_t* pOffset) const { |
| return m_pCMap->GetNextChar(pString, pOffset); |
| } |
| |
| int CPDF_CIDFont::GetCharSize(uint32_t charcode) const { |
| return m_pCMap->GetCharSize(charcode); |
| } |
| |
| size_t CPDF_CIDFont::CountChar(ByteStringView pString) const { |
| return m_pCMap->CountChar(pString); |
| } |
| |
| int CPDF_CIDFont::AppendChar(char* str, uint32_t charcode) const { |
| return m_pCMap->AppendChar(str, charcode); |
| } |
| |
| bool CPDF_CIDFont::IsUnicodeCompatible() const { |
| if (m_pCID2UnicodeMap && m_pCID2UnicodeMap->IsLoaded() && m_pCMap->IsLoaded()) |
| return true; |
| return m_pCMap->GetCoding() != CIDCODING_UNKNOWN; |
| } |
| |
| void CPDF_CIDFont::LoadSubstFont() { |
| pdfium::base::CheckedNumeric<int> safeStemV(m_StemV); |
| safeStemV *= 5; |
| m_Font.LoadSubst(m_BaseFont, !m_bType1, m_Flags, |
| safeStemV.ValueOrDefault(FXFONT_FW_NORMAL), m_ItalicAngle, |
| g_CharsetCPs[m_Charset], IsVertWriting()); |
| } |
| |
| void CPDF_CIDFont::LoadMetricsArray(const CPDF_Array* pArray, |
| std::vector<uint32_t>* result, |
| int nElements) { |
| int width_status = 0; |
| int iCurElement = 0; |
| uint32_t first_code = 0; |
| uint32_t last_code = 0; |
| for (size_t i = 0; i < pArray->size(); i++) { |
| const CPDF_Object* pObj = pArray->GetDirectObjectAt(i); |
| if (!pObj) |
| continue; |
| |
| if (const CPDF_Array* pObjArray = pObj->AsArray()) { |
| if (width_status != 1) |
| return; |
| if (first_code > |
| std::numeric_limits<uint32_t>::max() - pObjArray->size()) { |
| width_status = 0; |
| continue; |
| } |
| |
| for (size_t j = 0; j < pObjArray->size(); j += nElements) { |
| result->push_back(first_code); |
| result->push_back(first_code); |
| for (int k = 0; k < nElements; k++) |
| result->push_back(pObjArray->GetIntegerAt(j + k)); |
| first_code++; |
| } |
| width_status = 0; |
| } else { |
| if (width_status == 0) { |
| first_code = pObj->GetInteger(); |
| width_status = 1; |
| } else if (width_status == 1) { |
| last_code = pObj->GetInteger(); |
| width_status = 2; |
| iCurElement = 0; |
| } else { |
| if (!iCurElement) { |
| result->push_back(first_code); |
| result->push_back(last_code); |
| } |
| result->push_back(pObj->GetInteger()); |
| iCurElement++; |
| if (iCurElement == nElements) |
| width_status = 0; |
| } |
| } |
| } |
| } |
| |
| // static |
| float CPDF_CIDFont::CIDTransformToFloat(uint8_t ch) { |
| return (ch < 128 ? ch : ch - 255) * (1.0f / 127); |
| } |
| |
| void CPDF_CIDFont::LoadGB2312() { |
| m_BaseFont = m_pFontDict->GetStringFor("BaseFont"); |
| const CPDF_Dictionary* pFontDesc = m_pFontDict->GetDictFor("FontDescriptor"); |
| if (pFontDesc) |
| LoadFontDescriptor(pFontDesc); |
| |
| m_Charset = CIDSET_GB1; |
| |
| CPDF_CMapManager* manager = GetFontGlobals()->GetCMapManager(); |
| m_pCMap = manager->GetPredefinedCMap("GBK-EUC-H"); |
| m_pCID2UnicodeMap = manager->GetCID2UnicodeMap(m_Charset); |
| if (!IsEmbedded()) |
| LoadSubstFont(); |
| |
| CheckFontMetrics(); |
| m_bAnsiWidthsFixed = true; |
| } |
| |
| const uint8_t* CPDF_CIDFont::GetCIDTransform(uint16_t CID) const { |
| if (m_Charset != CIDSET_JAPAN1 || m_pFontFile) |
| return nullptr; |
| |
| const auto* pEnd = g_Japan1_VertCIDs + FX_ArraySize(g_Japan1_VertCIDs); |
| const auto* pTransform = std::lower_bound( |
| g_Japan1_VertCIDs, pEnd, CID, |
| [](const CIDTransform& entry, uint16_t cid) { return entry.cid < cid; }); |
| return (pTransform < pEnd && CID == pTransform->cid) ? &pTransform->a |
| : nullptr; |
| } |
