| // 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_type1font.h" |
| |
| #include <algorithm> |
| #include <iterator> |
| |
| #include "build/build_config.h" |
| #include "core/fpdfapi/parser/cpdf_dictionary.h" |
| #include "core/fxcrt/fx_system.h" |
| #include "core/fxcrt/span_util.h" |
| #include "core/fxge/cfx_fontmapper.h" |
| #include "core/fxge/cfx_gemodule.h" |
| #include "core/fxge/freetype/fx_freetype.h" |
| #include "core/fxge/fx_font.h" |
| |
| #if BUILDFLAG(IS_APPLE) |
| #include <Carbon/Carbon.h> |
| #endif // BUILDFLAG(IS_APPLE) |
| |
| namespace { |
| |
| #if BUILDFLAG(IS_APPLE) |
| struct GlyphNameMap { |
| const char* m_pStrAdobe; // Raw, POD struct. |
| const char* m_pStrUnicode; // Raw, POD struct. |
| }; |
| |
| const GlyphNameMap kGlyphNameSubsts[] = {{"ff", "uniFB00"}, |
| {"ffi", "uniFB03"}, |
| {"ffl", "uniFB04"}, |
| {"fi", "uniFB01"}, |
| {"fl", "uniFB02"}}; |
| |
| const char* GlyphNameRemap(const char* pStrAdobe) { |
| for (const auto& element : kGlyphNameSubsts) { |
| if (!FXSYS_stricmp(element.m_pStrAdobe, pStrAdobe)) |
| return element.m_pStrUnicode; |
| } |
| return nullptr; |
| } |
| |
| #endif // BUILDFLAG(IS_APPLE) |
| |
| bool FT_UseType1Charmap(FXFT_FaceRec* face) { |
| if (face->num_charmaps == 0) |
| return false; |
| |
| bool is_first_charmap_unicode = |
| FXFT_Get_Charmap_Encoding(face->charmaps[0]) == FT_ENCODING_UNICODE; |
| if (face->num_charmaps == 1 && is_first_charmap_unicode) |
| return false; |
| |
| int index = is_first_charmap_unicode ? 1 : 0; |
| FT_Set_Charmap(face, face->charmaps[index]); |
| return true; |
| } |
| |
| } // namespace |
| |
| CPDF_Type1Font::CPDF_Type1Font(CPDF_Document* pDocument, |
| CPDF_Dictionary* pFontDict) |
| : CPDF_SimpleFont(pDocument, pFontDict) { |
| #if BUILDFLAG(IS_APPLE) |
| memset(m_ExtGID, 0xff, sizeof(m_ExtGID)); |
| #endif |
| } |
| |
| CPDF_Type1Font::~CPDF_Type1Font() = default; |
| |
| bool CPDF_Type1Font::IsType1Font() const { |
| return true; |
| } |
| |
| const CPDF_Type1Font* CPDF_Type1Font::AsType1Font() const { |
| return this; |
| } |
| |
| CPDF_Type1Font* CPDF_Type1Font::AsType1Font() { |
| return this; |
| } |
| |
| bool CPDF_Type1Font::Load() { |
| m_Base14Font = CFX_FontMapper::GetStandardFontName(&m_BaseFontName); |
| if (!IsBase14Font()) |
| return LoadCommon(); |
| |
| const CPDF_Dictionary* pFontDesc = m_pFontDict->GetDictFor("FontDescriptor"); |
| if (pFontDesc && pFontDesc->KeyExist("Flags")) { |
| m_Flags = pFontDesc->GetIntegerFor("Flags"); |
| } else if (IsSymbolicFont()) { |
| m_Flags = FXFONT_SYMBOLIC; |
| } else { |
| m_Flags = FXFONT_NONSYMBOLIC; |
| } |
| if (IsFixedFont()) { |
| std::fill(std::begin(m_CharWidth), std::end(m_CharWidth), 600); |
| } |
| if (m_Base14Font == CFX_FontMapper::kSymbol) |
| m_BaseEncoding = FontEncoding::kAdobeSymbol; |
| else if (m_Base14Font == CFX_FontMapper::kDingbats) |
| m_BaseEncoding = FontEncoding::kZapfDingbats; |
| else if (FontStyleIsNonSymbolic(m_Flags)) |
| m_BaseEncoding = FontEncoding::kStandard; |
| return LoadCommon(); |
| } |
| |
| #if BUILDFLAG(IS_APPLE) |
| int CPDF_Type1Font::GlyphFromCharCodeExt(uint32_t charcode) { |
| if (charcode > 0xff) |
| return -1; |
| |
| int index = m_ExtGID[static_cast<uint8_t>(charcode)]; |
| return index != 0xffff ? index : -1; |
| } |
| #endif |
| |
| void CPDF_Type1Font::LoadGlyphMap() { |
| if (!m_Font.GetFaceRec()) |
| return; |
| |
| #if BUILDFLAG(IS_APPLE) |
| bool bCoreText = true; |
| if (!m_Font.GetPlatformFont()) { |
| if (m_Font.GetPsName() == "DFHeiStd-W5") |
| bCoreText = false; |
| |
| auto* pPlatform = CFX_GEModule::Get()->GetPlatform(); |
| pdfium::span<const uint8_t> span = m_Font.GetFontSpan(); |
| m_Font.SetPlatformFont(pPlatform->CreatePlatformFont(span)); |
| if (!m_Font.GetPlatformFont()) |
| bCoreText = false; |
| } |
| #endif |
| if (!IsEmbedded() && !IsSymbolicFont() && m_Font.IsTTFont()) { |
| if (UseTTCharmapMSSymbol(m_Font.GetFaceRec())) { |
| bool bGotOne = false; |
| for (uint32_t charcode = 0; charcode < kInternalTableSize; charcode++) { |
| const uint8_t prefix[4] = {0x00, 0xf0, 0xf1, 0xf2}; |
| for (int j = 0; j < 4; j++) { |
| uint16_t unicode = prefix[j] * 256 + charcode; |
| m_GlyphIndex[charcode] = |
| FT_Get_Char_Index(m_Font.GetFaceRec(), unicode); |
| #if BUILDFLAG(IS_APPLE) |
| CalcExtGID(charcode); |
| #endif |
| if (m_GlyphIndex[charcode]) { |
| bGotOne = true; |
| break; |
| } |
| } |
| } |
| if (bGotOne) { |
| #if BUILDFLAG(IS_APPLE) |
| if (!bCoreText) |
| memcpy(m_ExtGID, m_GlyphIndex, sizeof(m_ExtGID)); |
| #endif |
| return; |
| } |
| } |
| FXFT_Select_Charmap(m_Font.GetFaceRec(), FT_ENCODING_UNICODE); |
| if (m_BaseEncoding == FontEncoding::kBuiltin) |
| m_BaseEncoding = FontEncoding::kStandard; |
| |
| for (uint32_t charcode = 0; charcode < kInternalTableSize; charcode++) { |
| const char* name = |
| GetAdobeCharName(m_BaseEncoding, m_CharNames, charcode); |
| if (!name) |
| continue; |
| |
| m_Encoding.SetUnicode(charcode, UnicodeFromAdobeName(name)); |
| m_GlyphIndex[charcode] = FT_Get_Char_Index( |
| m_Font.GetFaceRec(), m_Encoding.UnicodeFromCharCode(charcode)); |
| #if BUILDFLAG(IS_APPLE) |
| CalcExtGID(charcode); |
| #endif |
| if (m_GlyphIndex[charcode] == 0 && strcmp(name, ".notdef") == 0) { |
| m_Encoding.SetUnicode(charcode, 0x20); |
| m_GlyphIndex[charcode] = FT_Get_Char_Index(m_Font.GetFaceRec(), 0x20); |
| #if BUILDFLAG(IS_APPLE) |
| CalcExtGID(charcode); |
| #endif |
| } |
| } |
| #if BUILDFLAG(IS_APPLE) |
| if (!bCoreText) { |
| fxcrt::spancpy(pdfium::make_span(m_ExtGID), |
| pdfium::make_span(m_GlyphIndex)); |
| } |
| #endif |
| return; |
| } |
| FT_UseType1Charmap(m_Font.GetFaceRec()); |
| #if BUILDFLAG(IS_APPLE) |
| if (bCoreText) { |
| if (FontStyleIsSymbolic(m_Flags)) { |
| for (uint32_t charcode = 0; charcode < kInternalTableSize; charcode++) { |
| const char* name = |
| GetAdobeCharName(m_BaseEncoding, m_CharNames, charcode); |
| if (name) { |
| m_Encoding.SetUnicode(charcode, UnicodeFromAdobeName(name)); |
| m_GlyphIndex[charcode] = FT_Get_Name_Index(m_Font.GetFaceRec(), name); |
| SetExtGID(name, charcode); |
| } else { |
| m_GlyphIndex[charcode] = |
| FT_Get_Char_Index(m_Font.GetFaceRec(), charcode); |
| char name_glyph[kInternalTableSize] = {}; |
| FT_Get_Glyph_Name(m_Font.GetFaceRec(), m_GlyphIndex[charcode], |
| name_glyph, sizeof(name_glyph)); |
| name_glyph[kInternalTableSize - 1] = 0; |
| const wchar_t unicode = |
| name_glyph[0] != 0 ? UnicodeFromAdobeName(name_glyph) : 0; |
| m_Encoding.SetUnicode(charcode, unicode); |
| SetExtGID(name_glyph, charcode); |
| } |
| } |
| return; |
| } |
| |
| bool bUnicode = |
| FXFT_Select_Charmap(m_Font.GetFaceRec(), FT_ENCODING_UNICODE) == 0; |
| for (uint32_t charcode = 0; charcode < kInternalTableSize; charcode++) { |
| const char* name = |
| GetAdobeCharName(m_BaseEncoding, m_CharNames, charcode); |
| if (!name) |
| continue; |
| |
| m_Encoding.SetUnicode(charcode, UnicodeFromAdobeName(name)); |
| const char* pStrUnicode = GlyphNameRemap(name); |
| if (pStrUnicode && FT_Get_Name_Index(m_Font.GetFaceRec(), name) == 0) { |
| name = pStrUnicode; |
| } |
| m_GlyphIndex[charcode] = FT_Get_Name_Index(m_Font.GetFaceRec(), name); |
| SetExtGID(name, charcode); |
| if (m_GlyphIndex[charcode] != 0) |
| continue; |
| |
| if (strcmp(name, ".notdef") != 0 && strcmp(name, "space") != 0) { |
| m_GlyphIndex[charcode] = FT_Get_Char_Index( |
| m_Font.GetFaceRec(), |
| bUnicode ? m_Encoding.UnicodeFromCharCode(charcode) : charcode); |
| CalcExtGID(charcode); |
| } else { |
| m_Encoding.SetUnicode(charcode, 0x20); |
| m_GlyphIndex[charcode] = |
| bUnicode ? FT_Get_Char_Index(m_Font.GetFaceRec(), 0x20) : 0xffff; |
| CalcExtGID(charcode); |
| } |
| } |
| return; |
| } |
| #endif // BUILDFLAG(IS_APPLE) |
| if (FontStyleIsSymbolic(m_Flags)) { |
| for (size_t charcode = 0; charcode < kInternalTableSize; charcode++) { |
| const char* name = GetAdobeCharName(m_BaseEncoding, m_CharNames, |
| static_cast<uint32_t>(charcode)); |
| if (name) { |
| m_Encoding.SetUnicode(charcode, UnicodeFromAdobeName(name)); |
| m_GlyphIndex[charcode] = FT_Get_Name_Index(m_Font.GetFaceRec(), name); |
| } else { |
| m_GlyphIndex[charcode] = FT_Get_Char_Index( |
| m_Font.GetFaceRec(), static_cast<uint32_t>(charcode)); |
| if (m_GlyphIndex[charcode]) { |
| char name_glyph[kInternalTableSize] = {}; |
| FT_Get_Glyph_Name(m_Font.GetFaceRec(), m_GlyphIndex[charcode], |
| name_glyph, sizeof(name_glyph)); |
| name_glyph[kInternalTableSize - 1] = 0; |
| const wchar_t unicode = |
| name_glyph[0] != 0 ? UnicodeFromAdobeName(name_glyph) : 0; |
| m_Encoding.SetUnicode(charcode, unicode); |
| } |
| } |
| } |
| #if BUILDFLAG(IS_APPLE) |
| if (!bCoreText) |
| memcpy(m_ExtGID, m_GlyphIndex, sizeof(m_ExtGID)); |
| #endif |
| return; |
| } |
| |
| bool bUnicode = |
| FXFT_Select_Charmap(m_Font.GetFaceRec(), FT_ENCODING_UNICODE) == 0; |
| for (size_t charcode = 0; charcode < kInternalTableSize; charcode++) { |
| const char* name = GetAdobeCharName(m_BaseEncoding, m_CharNames, |
| static_cast<uint32_t>(charcode)); |
| if (!name) |
| continue; |
| |
| m_Encoding.SetUnicode(charcode, UnicodeFromAdobeName(name)); |
| m_GlyphIndex[charcode] = FT_Get_Name_Index(m_Font.GetFaceRec(), name); |
| if (m_GlyphIndex[charcode] != 0) |
| continue; |
| |
| if (strcmp(name, ".notdef") != 0 && strcmp(name, "space") != 0) { |
| m_GlyphIndex[charcode] = |
| FT_Get_Char_Index(m_Font.GetFaceRec(), |
| bUnicode ? m_Encoding.UnicodeFromCharCode(charcode) |
| : static_cast<uint32_t>(charcode)); |
| } else { |
| m_Encoding.SetUnicode(charcode, 0x20); |
| m_GlyphIndex[charcode] = 0xffff; |
| } |
| } |
| #if BUILDFLAG(IS_APPLE) |
| if (!bCoreText) |
| memcpy(m_ExtGID, m_GlyphIndex, sizeof(m_ExtGID)); |
| #endif |
| } |
| |
| bool CPDF_Type1Font::IsSymbolicFont() const { |
| return m_Base14Font.has_value() && |
| CFX_FontMapper::IsSymbolicFont(m_Base14Font.value()); |
| } |
| |
| bool CPDF_Type1Font::IsFixedFont() const { |
| return m_Base14Font.has_value() && |
| CFX_FontMapper::IsFixedFont(m_Base14Font.value()); |
| } |
| |
| #if BUILDFLAG(IS_APPLE) |
| void CPDF_Type1Font::SetExtGID(const char* name, uint32_t charcode) { |
| CFStringRef name_ct = CFStringCreateWithCStringNoCopy( |
| kCFAllocatorDefault, name, kCFStringEncodingASCII, kCFAllocatorNull); |
| m_ExtGID[charcode] = |
| CGFontGetGlyphWithGlyphName((CGFontRef)m_Font.GetPlatformFont(), name_ct); |
| if (name_ct) |
| CFRelease(name_ct); |
| } |
| |
| void CPDF_Type1Font::CalcExtGID(uint32_t charcode) { |
| char name_glyph[kInternalTableSize] = {}; |
| FT_Get_Glyph_Name(m_Font.GetFaceRec(), m_GlyphIndex[charcode], name_glyph, |
| sizeof(name_glyph)); |
| name_glyph[kInternalTableSize - 1] = 0; |
| SetExtGID(name_glyph, charcode); |
| } |
| #endif // BUILDFLAG(IS_APPLE) |
