diff options
Diffstat (limited to 'core/fpdfapi/font/cpdf_cidfont.cpp')
| -rw-r--r-- | core/fpdfapi/font/cpdf_cidfont.cpp | 852 |
1 files changed, 852 insertions, 0 deletions
diff --git a/core/fpdfapi/font/cpdf_cidfont.cpp b/core/fpdfapi/font/cpdf_cidfont.cpp new file mode 100644 index 0000000000..e5bbd80a83 --- /dev/null +++ b/core/fpdfapi/font/cpdf_cidfont.cpp @@ -0,0 +1,852 @@ +// 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 <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/fpdf_page/cpdf_pagemodule.h" +#include "core/fpdfapi/fpdf_parser/cpdf_array.h" +#include "core/fpdfapi/fpdf_parser/cpdf_dictionary.h" +#include "core/fpdfapi/fpdf_parser/cpdf_stream_acc.h" +#include "third_party/base/numerics/safe_math.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}, +}; + +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; + } +} + +FX_WCHAR 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, + FX_WCHAR 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_pCMap(nullptr), + 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; + FX_WCHAR ret = GetUnicodeFromCharCode(charcode); + return ret ? ret : CFX_WideString(); +} + +FX_WCHAR CPDF_CIDFont::GetUnicodeFromCharCode(uint32_t charcode) const { + switch (m_pCMap->m_Coding) { + case CIDCODING_UCS2: + case CIDCODING_UTF16: + return static_cast<FX_WCHAR>(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_ + FX_WCHAR 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 FX_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(FX_WCHAR 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) { + FX_WCHAR 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()) { + m_pCMap = new CPDF_CMap; + m_pAllocatedCMap.reset(m_pCMap); + CPDF_StreamAcc acc; + acc.LoadAllData(pStream, FALSE); + 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.reset(new 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_BBox cbox; + FXFT_Glyph glyph; + err = FXFT_Get_Glyph(((FXFT_Face)face)->glyph, &glyph); + if (!err) { + FXFT_Glyph_Get_CBox(glyph, FXFT_GLYPH_BBOX_PIXELS, &cbox); + 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); + rect_f.Transform(&matrix); + 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); + int size = m_WidthList.GetSize(); + const uint32_t* pList = m_WidthList.GetData(); + for (int 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 { + uint32_t vertsize = m_VertMetrics.GetSize() / 5; + if (vertsize) { + const uint32_t* pTable = m_VertMetrics.GetData(); + for (uint32_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 { + uint32_t vertsize = m_VertMetrics.GetSize() / 5; + if (vertsize) { + const uint32_t* pTable = m_VertMetrics.GetData(); + for (uint32_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; + int size = m_WidthList.GetSize(); + const uint32_t* pList = m_WidthList.GetData(); + for (int 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.reset(new 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); + FX_WCHAR unicode = 0; + if (m_bCIDIsGID) { +#if _FXM_PLATFORM_ != _FXM_PLATFORM_APPLE_ + return cid; +#else + if (m_Flags & PDFFONT_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 FX_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<FX_WCHAR>(charcode)); + if (ret == 0) + continue; + FXFT_Set_Charmap(face, FXFT_Get_Face_Charmaps(face)[i]); + unicode = static_cast<FX_WCHAR>(ret); + break; + } + if (i == FXFT_Get_Face_CharmapCount(face) && i) { + FXFT_Set_Charmap(face, FXFT_Get_Face_Charmaps(face)[0]); + unicode = static_cast<FX_WCHAR>(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 FX_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 FX_CHAR* pString, int size) const { + return m_pCMap->CountChar(pString, size); +} + +int CPDF_CIDFont::AppendChar(FX_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, + CFX_ArrayTemplate<uint32_t>& result, + int nElements) { + int width_status = 0; + int iCurElement = 0; + int first_code = 0; + int 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; + + for (size_t j = 0; j < pObjArray->GetCount(); j += nElements) { + result.Add(first_code); + result.Add(first_code); + for (int k = 0; k < nElements; k++) + result.Add(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.Add(first_code); + result.Add(last_code); + } + result.Add(pObj->GetInteger()); + iCurElement++; + if (iCurElement == nElements) + width_status = 0; + } + } + } +} + +// static +FX_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; +} |