// 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/cpdf_fontencoding.h" #include "core/fpdfapi/font/font_int.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_stream_acc.h" #include "third_party/base/numerics/safe_math.h" #include "third_party/base/ptr_util.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. const long kMinCBox = -2147483; const long kMaxCBox = 2147483; CPDF_FontGlobals* GetFontGlobals() { return CPDF_ModuleMgr::Get()->GetPageModule()->GetFontGlobals(); } #if _FXM_PLATFORM_ != _FXM_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 = FPDFAPI_CIDFromCharCode(pEmbedMap, charcode); const auto& codes = GetFontGlobals()->m_EmbeddedToUnicodes[charset]; if (codes.m_pMap && cid && cid < codes.m_Count) return codes.m_pMap[cid]; return 0; } uint32_t EmbeddedCharcodeFromUnicode(const FXCMAP_CMap* pEmbedMap, CIDSet charset, wchar_t unicode) { if (!IsValidEmbeddedCharcodeFromUnicodeCharset(charset)) return 0; const auto& codes = GetFontGlobals()->m_EmbeddedToUnicodes[charset]; const uint16_t* pCodes = codes.m_pMap; if (!pCodes) return 0; for (uint32_t i = 0; i < codes.m_Count; ++i) { if (pCodes[i] == unicode) { uint32_t CharCode = FPDFAPI_CharCodeFromCID(pEmbedMap, i); if (CharCode) return CharCode; } } return 0; } #endif // _FXM_PLATFORM_ != _FXM_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() : m_pCID2UnicodeMap(nullptr), m_bCIDIsGID(false), m_bAnsiWidthsFixed(false), m_bAdobeCourierStd(false) { 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(); } CFX_WideString CPDF_CIDFont::UnicodeFromCharCode(uint32_t charcode) const { CFX_WideString str = CPDF_Font::UnicodeFromCharCode(charcode); if (!str.IsEmpty()) return str; wchar_t ret = GetUnicodeFromCharCode(charcode); return ret ? ret : CFX_WideString(); } wchar_t CPDF_CIDFont::GetUnicodeFromCharCode(uint32_t charcode) const { switch (m_pCMap->m_Coding) { 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 _FXM_PLATFORM_ == _FXM_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->m_Coding], 0, reinterpret_cast<const char*>(&charcode), charsize, &unicode, 1); return ret == 1 ? unicode : 0; #else if (!m_pCMap->m_pEmbedMap) return 0; return EmbeddedUnicodeFromCharcode(m_pCMap->m_pEmbedMap, m_pCMap->m_Charset, 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->m_Coding) { 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->m_Coding == CIDCODING_CID) return 0; #if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_ uint8_t buffer[32]; int ret = FXSYS_WideCharToMultiByte( g_CharsetCPs[m_pCMap->m_Coding], 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->m_pEmbedMap) { return EmbeddedCharcodeFromUnicode(m_pCMap->m_pEmbedMap, m_pCMap->m_Charset, unicode); } #endif return 0; } bool CPDF_CIDFont::Load() { if (m_pFontDict->GetStringFor("Subtype") == "TrueType") { LoadGB2312(); return true; } CPDF_Array* pFonts = m_pFontDict->GetArrayFor("DescendantFonts"); if (!pFonts || pFonts->GetCount() != 1) return false; 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; } CPDF_Dictionary* pFontDesc = pCIDFontDict->GetDictFor("FontDescriptor"); if (pFontDesc) LoadFontDescriptor(pFontDesc); CPDF_Object* pEncoding = m_pFontDict->GetDirectObjectFor("Encoding"); if (!pEncoding) return false; CFX_ByteString subtype = pCIDFontDict->GetStringFor("Subtype"); m_bType1 = (subtype == "CIDFontType0"); CPDF_CMapManager& manager = GetFontGlobals()->m_CMapManager; if (pEncoding->IsName()) { CFX_ByteString cmap = pEncoding->GetString(); bool bPromptCJK = m_pFontFile && m_bType1; m_pCMap = manager.GetPredefinedCMap(cmap, bPromptCJK); if (!m_pCMap) return false; } else if (CPDF_Stream* pStream = pEncoding->AsStream()) { CPDF_StreamAcc acc; acc.LoadAllData(pStream, false); m_pCMap = pdfium::MakeRetain<CPDF_CMap>(); m_pCMap->LoadEmbedded(acc.GetData(), acc.GetSize()); } else { return false; } m_Charset = m_pCMap->m_Charset; if (m_Charset == CIDSET_UNKNOWN) { CPDF_Dictionary* pCIDInfo = pCIDFontDict->GetDictFor("CIDSystemInfo"); if (pCIDInfo) { m_Charset = CharsetFromOrdering(pCIDInfo->GetStringFor("Ordering").AsStringC()); } } if (m_Charset != CIDSET_UNKNOWN) { bool bPromptCJK = !m_pFontFile && (m_pCMap->m_Coding == CIDCODING_CID || pCIDFontDict->KeyExist("W")); m_pCID2UnicodeMap = manager.GetCID2UnicodeMap(m_Charset, bPromptCJK); } if (m_Font.GetFace()) { if (m_bType1) FXFT_Select_Charmap(m_Font.GetFace(), FXFT_ENCODING_UNICODE); else FT_UseCIDCharmap(m_Font.GetFace(), m_pCMap->m_Coding); } m_DefaultWidth = pCIDFontDict->GetIntegerFor("DW", 1000); CPDF_Array* pWidthArray = pCIDFontDict->GetArrayFor("W"); if (pWidthArray) LoadMetricsArray(pWidthArray, &m_WidthList, 1); if (!IsEmbedded()) LoadSubstFont(); if (m_pFontFile || (GetSubstFont()->m_SubstFlags & FXFONT_SUBST_EXACT)) { CPDF_Object* pmap = pCIDFontDict->GetDirectObjectFor("CIDToGIDMap"); if (pmap) { if (CPDF_Stream* pStream = pmap->AsStream()) { m_pStreamAcc = pdfium::MakeUnique<CPDF_StreamAcc>(); m_pStreamAcc->LoadAllData(pStream, false); } else if (pmap->GetString() == "Identity") { #if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_ if (m_pFontFile) m_bCIDIsGID = true; #else m_bCIDIsGID = true; #endif } } } CheckFontMetrics(); if (IsVertWriting()) { pWidthArray = pCIDFontDict->GetArrayFor("W2"); if (pWidthArray) LoadMetricsArray(pWidthArray, &m_VertMetrics, 3); CPDF_Array* pDefaultArray = pCIDFontDict->GetArrayFor("DW2"); if (pDefaultArray) { m_DefaultVY = pDefaultArray->GetIntegerAt(0); m_DefaultW1 = pDefaultArray->GetIntegerAt(1); } else { m_DefaultVY = 880; m_DefaultW1 = -1000; } } 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)); rect.top += rect.top / 64; } } } 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); CFX_FloatRect rect_f(rect); matrix.TransformRect(rect_f); rect = rect_f.GetOuterRect(); } } if (charcode < 256) m_CharBBox[charcode] = rect; return rect; } int 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 static_cast<int>(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_pTTGSUBTable->LoadGSUBTable((FT_Bytes)m_Font.GetSubData()); return GetVerticalGlyph(index, pVertGlyph); } int CPDF_CIDFont::GetVerticalGlyph(int index, bool* pVertGlyph) { uint32_t vindex = 0; m_pTTGSUBTable->GetVerticalGlyph(index, &vindex); 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 _FXM_PLATFORM_ != _FXM_PLATFORM_APPLE_ return cid; #else if (m_Flags & FXFONT_SYMBOLIC) return cid; CFX_WideString uni_str = UnicodeFromCharCode(charcode); if (uni_str.IsEmpty()) return cid; unicode = uni_str.GetAt(0); #endif } else { if (cid && m_pCID2UnicodeMap && m_pCID2UnicodeMap->IsLoaded()) unicode = m_pCID2UnicodeMap->UnicodeFromCID(cid); if (unicode == 0) unicode = GetUnicodeFromCharCode(charcode); if (unicode == 0) { CFX_WideString unicode_str = UnicodeFromCharCode(charcode); if (!unicode_str.IsEmpty()) unicode = unicode_str.GetAt(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<CFX_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, const_cast<char*>(name)); } if (index == 0 || index == 0xffff) return charcode ? static_cast<int>(charcode) : -1; return index; } if (m_Charset == CIDSET_JAPAN1) { if (unicode == '\\') { unicode = '/'; #if _FXM_PLATFORM_ != _FXM_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->m_pMapping) return cid; if (m_pCMap->m_Coding == 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) { CFX_WideString unicode_str = UnicodeFromCharCode(charcode); if (unicode_str.IsEmpty()) return -1; charcode = unicode_str.GetAt(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(const char* pString, int nStrLen, int& offset) const { return m_pCMap->GetNextChar(pString, nStrLen, offset); } int CPDF_CIDFont::GetCharSize(uint32_t charcode) const { return m_pCMap->GetCharSize(charcode); } int CPDF_CIDFont::CountChar(const char* pString, int size) const { return m_pCMap->CountChar(pString, size); } 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->m_Coding != 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(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->GetCount(); i++) { CPDF_Object* pObj = pArray->GetDirectObjectAt(i); if (!pObj) continue; if (CPDF_Array* pObjArray = pObj->AsArray()) { if (width_status != 1) return; if (first_code > std::numeric_limits<uint32_t>::max() - pObjArray->GetCount()) { width_status = 0; continue; } for (size_t j = 0; j < pObjArray->GetCount(); 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"); CPDF_Dictionary* pFontDesc = m_pFontDict->GetDictFor("FontDescriptor"); if (pFontDesc) LoadFontDescriptor(pFontDesc); m_Charset = CIDSET_GB1; m_bType1 = false; CPDF_CMapManager& manager = GetFontGlobals()->m_CMapManager; m_pCMap = manager.GetPredefinedCMap("GBK-EUC-H", false); m_pCID2UnicodeMap = manager.GetCID2UnicodeMap(m_Charset, false); if (!IsEmbedded()) LoadSubstFont(); CheckFontMetrics(); m_DefaultWidth = 1000; 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; }