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pdfium / pdfium / refs/heads/chromium/5438 / . / core / fpdfapi / font / cpdf_cidfont.cpp
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// Copyright 2016 The PDFium Authors
// 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 <utility>
#include <vector>
#include "build/build_config.h"
#include "core/fpdfapi/cmaps/fpdf_cmaps.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/font/cpdf_fontglobals.h"
#include "core/fpdfapi/parser/cpdf_array.h"
#include "core/fpdfapi/parser/cpdf_dictionary.h"
#include "core/fpdfapi/parser/cpdf_stream.h"
#include "core/fpdfapi/parser/cpdf_stream_acc.h"
#include "core/fxcrt/fx_codepage.h"
#include "core/fxcrt/fx_memory.h"
#include "core/fxcrt/fx_safe_types.h"
#include "core/fxcrt/fx_unicode.h"
#include "core/fxcrt/stl_util.h"
#include "core/fxge/fx_font.h"
#include "third_party/base/check.h"
#include "third_party/base/check_op.h"
#include "third_party/base/cxx17_backports.h"
#include "third_party/base/span.h"
namespace {
constexpr FX_CodePage kCharsetCodePages[CIDSET_NUM_SETS] = {
FX_CodePage::kDefANSI,
FX_CodePage::kChineseSimplified,
FX_CodePage::kChineseTraditional,
FX_CodePage::kShiftJIS,
FX_CodePage::kHangul,
FX_CodePage::kUTF16LE};
struct CIDTransform {
uint16_t cid;
uint8_t a;
uint8_t b;
uint8_t c;
uint8_t d;
uint8_t e;
uint8_t f;
};
constexpr CIDTransform kJapan1VerticalCIDs[] = {
{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 value to avoid integer overflow when adding 1/64th of the value.
constexpr int kMaxRectTop = 2114445437;
int FTPosToCBoxInt(FT_Pos pos) {
// Boundary values to avoid integer overflow when multiplied by 1000.
constexpr FT_Pos kMinCBox = -2147483;
constexpr FT_Pos kMaxCBox = 2147483;
return static_cast<int>(pdfium::clamp(pos, kMinCBox, kMaxCBox));
}
#if !BUILDFLAG(IS_WIN)
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 =
CPDF_FontGlobals::GetInstance()->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 =
CPDF_FontGlobals::GetInstance()->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 // !BUILDFLAG(IS_WIN)
void FT_UseCIDCharmap(FXFT_FaceRec* face, CIDCoding coding) {
int encoding;
switch (coding) {
case CIDCoding::kGB:
encoding = FT_ENCODING_GB2312;
break;
case CIDCoding::kBIG5:
encoding = FT_ENCODING_BIG5;
break;
case CIDCoding::kJIS:
encoding = FT_ENCODING_SJIS;
break;
case CIDCoding::kKOREA:
encoding = FT_ENCODING_JOHAB;
break;
default:
encoding = FT_ENCODING_UNICODE;
}
int err = FXFT_Select_Charmap(face, encoding);
if (err)
err = FXFT_Select_Charmap(face, FT_ENCODING_UNICODE);
if (err && face->charmaps)
FT_Set_Charmap(face, face->charmaps[0]);
}
bool IsMetricForCID(const int* pEntry, uint16_t cid) {
return pEntry[0] <= cid && pEntry[1] >= cid;
}
void LoadMetricsArray(RetainPtr<const CPDF_Array> pArray,
std::vector<int>* 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->size(); i++) {
RetainPtr<const CPDF_Object> pObj = pArray->GetDirectObjectAt(i);
if (!pObj)
continue;
const CPDF_Array* pObjArray = pObj->AsArray();
if (pObjArray) {
if (width_status != 1)
return;
if (first_code > std::numeric_limits<int>::max() -
fxcrt::CollectionSize<int>(*pObjArray)) {
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;
}
}
}
}
} // namespace
CPDF_CIDFont::CPDF_CIDFont(CPDF_Document* pDocument,
RetainPtr<CPDF_Dictionary> pFontDict)
: CPDF_Font(pDocument, std::move(pFontDict)) {
for (size_t i = 0; i < std::size(m_CharBBox); ++i)
m_CharBBox[i] = FX_RECT(-1, -1, -1, -1);
}
CPDF_CIDFont::~CPDF_CIDFont() = default;
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 ? WideString(ret) : WideString();
}
wchar_t CPDF_CIDFont::GetUnicodeFromCharCode(uint32_t charcode) const {
switch (m_pCMap->GetCoding()) {
case CIDCoding::kUCS2:
case CIDCoding::kUTF16:
return static_cast<wchar_t>(charcode);
case CIDCoding::kCID:
if (!m_pCID2UnicodeMap || !m_pCID2UnicodeMap->IsLoaded())
return 0;
return m_pCID2UnicodeMap->UnicodeFromCID(static_cast<uint16_t>(charcode));
default:
break;
}
if (m_pCID2UnicodeMap && m_pCID2UnicodeMap->IsLoaded() && m_pCMap->IsLoaded())
return m_pCID2UnicodeMap->UnicodeFromCID(CIDFromCharCode(charcode));
#if BUILDFLAG(IS_WIN)
wchar_t unicode;
int charsize = 1;
if (charcode > 255) {
charcode = (charcode % 256) * 256 + (charcode / 256);
charsize = 2;
}
size_t ret = FX_MultiByteToWideChar(
kCharsetCodePages[static_cast<size_t>(m_pCMap->GetCoding())],
ByteStringView(reinterpret_cast<const char*>(&charcode), charsize),
pdfium::make_span(&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::kUNKNOWN:
return 0;
case CIDCoding::kUCS2:
case CIDCoding::kUTF16:
return unicode;
case CIDCoding::kCID: {
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;
}
default:
break;
}
if (unicode < 0x80)
return static_cast<uint32_t>(unicode);
if (m_pCMap->GetCoding() == CIDCoding::kCID)
return 0;
#if BUILDFLAG(IS_WIN)
uint8_t buffer[32];
size_t ret = FX_WideCharToMultiByte(
kCharsetCodePages[static_cast<size_t>(m_pCMap->GetCoding())],
WideStringView(&unicode, 1),
pdfium::make_span(reinterpret_cast<char*>(buffer), 4));
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->GetByteStringFor("Subtype") == "TrueType") {
LoadGB2312();
return true;
}
RetainPtr<const CPDF_Array> pFonts =
m_pFontDict->GetArrayFor("DescendantFonts");
if (!pFonts || pFonts->size() != 1)
return false;
RetainPtr<const CPDF_Dictionary> pCIDFontDict = pFonts->GetDictAt(0);
if (!pCIDFontDict)
return false;
m_BaseFontName = pCIDFontDict->GetByteStringFor("BaseFont");
if ((m_BaseFontName == "CourierStd" || m_BaseFontName == "CourierStd-Bold" ||
m_BaseFontName == "CourierStd-BoldOblique" ||
m_BaseFontName == "CourierStd-Oblique") &&
!IsEmbedded()) {
m_bAdobeCourierStd = true;
}
RetainPtr<const CPDF_Object> pEncoding =
m_pFontDict->GetDirectObjectFor("Encoding");
if (!pEncoding)
return false;
ByteString subtype = pCIDFontDict->GetByteStringFor("Subtype");
m_FontType =
subtype == "CIDFontType0" ? CIDFontType::kType1 : CIDFontType::kTrueType;
if (!pEncoding->IsName() && !pEncoding->IsStream())
return false;
auto* pFontGlobals = CPDF_FontGlobals::GetInstance();
const CPDF_Stream* pEncodingStream = pEncoding->AsStream();
if (pEncodingStream) {
auto pAcc =
pdfium::MakeRetain<CPDF_StreamAcc>(pdfium::WrapRetain(pEncodingStream));
pAcc->LoadAllDataFiltered();
pdfium::span<const uint8_t> span = pAcc->GetSpan();
m_pCMap = pdfium::MakeRetain<CPDF_CMap>(span);
} else {
DCHECK(pEncoding->IsName());
ByteString cmap = pEncoding->GetString();
m_pCMap = pFontGlobals->GetPredefinedCMap(cmap);
}
RetainPtr<const CPDF_Dictionary> pFontDesc =
pCIDFontDict->GetDictFor("FontDescriptor");
if (pFontDesc)
LoadFontDescriptor(pFontDesc.Get());
m_Charset = m_pCMap->GetCharset();
if (m_Charset == CIDSET_UNKNOWN) {
RetainPtr<const CPDF_Dictionary> pCIDInfo =
pCIDFontDict->GetDictFor("CIDSystemInfo");
if (pCIDInfo) {
m_Charset = CPDF_CMapParser::CharsetFromOrdering(
pCIDInfo->GetByteStringFor("Ordering").AsStringView());
}
}
if (m_Charset != CIDSET_UNKNOWN) {
m_pCID2UnicodeMap = pFontGlobals->GetCID2UnicodeMap(m_Charset);
}
if (m_Font.GetFaceRec()) {
if (m_FontType == CIDFontType::kType1)
FXFT_Select_Charmap(m_Font.GetFaceRec(), FT_ENCODING_UNICODE);
else
FT_UseCIDCharmap(m_Font.GetFaceRec(), m_pCMap->GetCoding());
}
m_DefaultWidth = pCIDFontDict->GetIntegerFor("DW", 1000);
RetainPtr<const CPDF_Array> pWidthArray = pCIDFontDict->GetArrayFor("W");
if (pWidthArray)
LoadMetricsArray(std::move(pWidthArray), &m_WidthList, 1);
if (!IsEmbedded())
LoadSubstFont();
RetainPtr<const CPDF_Object> pmap =
pCIDFontDict->GetDirectObjectFor("CIDToGIDMap");
if (pmap) {
RetainPtr<const CPDF_Stream> pMapStream(pmap->AsStream());
if (pMapStream) {
m_pStreamAcc = pdfium::MakeRetain<CPDF_StreamAcc>(std::move(pMapStream));
m_pStreamAcc->LoadAllDataFiltered();
} else if (m_pFontFile && pmap->IsName() &&
pmap->GetString() == "Identity") {
m_bCIDIsGID = true;
}
}
CheckFontMetrics();
if (IsVertWriting()) {
RetainPtr<const CPDF_Array> pWidth2Array = pCIDFontDict->GetArrayFor("W2");
if (pWidth2Array)
LoadMetricsArray(std::move(pWidth2Array), &m_VertMetrics, 3);
RetainPtr<const CPDF_Array> pDefaultArray =
pCIDFontDict->GetArrayFor("DW2");
if (pDefaultArray) {
m_DefaultVY = pDefaultArray->GetIntegerAt(0);
m_DefaultW1 = pDefaultArray->GetIntegerAt(1);
}
}
// TODO(thestig): Better identify font types and identify more font types.
if (m_FontType == CIDFontType::kTrueType && IsEmbedded())
m_Font.SetFontType(CFX_Font::FontType::kCIDTrueType);
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_FaceRec* face = m_Font.GetFaceRec();
if (face) {
if (FXFT_Is_Face_Tricky(face)) {
int err =
FT_Load_Glyph(face, glyph_index, FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH);
if (!err) {
FT_Glyph glyph;
err = FT_Get_Glyph(face->glyph, &glyph);
if (!err) {
FT_BBox cbox;
FT_Glyph_Get_CBox(glyph, FT_GLYPH_BBOX_PIXELS, &cbox);
const int xMin = FTPosToCBoxInt(cbox.xMin);
const int xMax = FTPosToCBoxInt(cbox.xMax);
const int yMin = FTPosToCBoxInt(cbox.yMin);
const int yMax = FTPosToCBoxInt(cbox.yMax);
const int pixel_size_x = face->size->metrics.x_ppem;
const int pixel_size_y = face->size->metrics.y_ppem;
if (pixel_size_x == 0 || pixel_size_y == 0) {
rect = FX_RECT(xMin, yMax, xMax, yMin);
} else {
rect =
FX_RECT(xMin * 1000 / pixel_size_x, yMax * 1000 / pixel_size_y,
xMax * 1000 / pixel_size_x, 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)));
FT_Done_Glyph(glyph);
}
}
} else {
int err = FT_Load_Glyph(face, glyph_index, FT_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;
}
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 int* pList = m_WidthList.data();
for (size_t i = 0; i < size; i += 3) {
const int* pEntry = pList + i;
if (IsMetricForCID(pEntry, cid))
return pEntry[2];
}
return m_DefaultWidth;
}
int16_t CPDF_CIDFont::GetVertWidth(uint16_t cid) const {
size_t vertsize = m_VertMetrics.size() / 5;
if (vertsize) {
const int* pTable = m_VertMetrics.data();
for (size_t i = 0; i < vertsize; i++) {
const int* pEntry = pTable + (i * 5);
if (IsMetricForCID(pEntry, cid))
return static_cast<int16_t>(pEntry[2]);
}
}
return m_DefaultW1;
}
CFX_Point16 CPDF_CIDFont::GetVertOrigin(uint16_t cid) const {
size_t vertsize = m_VertMetrics.size() / 5;
if (vertsize) {
const int* pTable = m_VertMetrics.data();
for (size_t i = 0; i < vertsize; i++) {
const int* pEntry = pTable + (i * 5);
if (IsMetricForCID(pEntry, cid)) {
return {static_cast<int16_t>(pEntry[3]),
static_cast<int16_t>(pEntry[4])};
}
}
}
int width = m_DefaultWidth;
size_t size = m_WidthList.size();
const int* pList = m_WidthList.data();
for (size_t i = 0; i < size; i += 3) {
const int* pEntry = pList + i;
if (IsMetricForCID(pEntry, cid)) {
width = pEntry[2];
break;
}
}
return {static_cast<int16_t>(width / 2), m_DefaultVY};
}
int CPDF_CIDFont::GetGlyphIndex(uint32_t unicode, bool* pVertGlyph) {
if (pVertGlyph)
*pVertGlyph = false;
FXFT_FaceRec* face = m_Font.GetFaceRec();
int index = FT_Get_Char_Index(face, unicode);
if (unicode == pdfium::unicode::kBoxDrawingsLightVerical)
return index;
if (!index || !IsVertWriting())
return index;
if (m_pTTGSUBTable)
return GetVerticalGlyph(index, pVertGlyph);
static constexpr uint32_t kGsubTag =
CFX_FontMapper::MakeTag('G', 'S', 'U', 'B');
if (!m_Font.GetSubData()) {
unsigned long length = 0;
int error = FT_Load_Sfnt_Table(face, kGsubTag, 0, nullptr, &length);
if (!error)
m_Font.AllocSubData(length);
}
int error =
FT_Load_Sfnt_Table(face, kGsubTag, 0, m_Font.GetSubData(), nullptr);
if (error || !m_Font.GetSubData())
return index;
m_pTTGSUBTable = std::make_unique<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 || m_pCID2UnicodeMap)) {
uint16_t cid = CIDFromCharCode(charcode);
wchar_t unicode = 0;
if (m_bCIDIsGID) {
#if BUILDFLAG(IS_APPLE)
if (FontStyleIsSymbolic(m_Flags))
return cid;
WideString uni_str = UnicodeFromCharCode(charcode);
if (uni_str.IsEmpty())
return cid;
unicode = uni_str[0];
#else
return cid;
#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_FaceRec* face = m_Font.GetFaceRec();
if (unicode == 0) {
if (!m_bAdobeCourierStd)
return charcode ? static_cast<int>(charcode) : -1;
charcode += 31;
bool bMSUnicode = UseTTCharmapMSUnicode(face);
bool bMacRoman = !bMSUnicode && UseTTCharmapMacRoman(face);
FontEncoding base_encoding = FontEncoding::kStandard;
if (bMSUnicode)
base_encoding = FontEncoding::kWinAnsi;
else if (bMacRoman)
base_encoding = FontEncoding::kMacRoman;
const char* name =
GetAdobeCharName(base_encoding, std::vector<ByteString>(), charcode);
if (!name)
return charcode ? static_cast<int>(charcode) : -1;
int index = 0;
uint16_t name_unicode = UnicodeFromAdobeName(name);
if (!name_unicode)
return charcode ? static_cast<int>(charcode) : -1;
if (base_encoding == FontEncoding::kStandard)
return FT_Get_Char_Index(face, name_unicode);
if (base_encoding == FontEncoding::kWinAnsi) {
index = FT_Get_Char_Index(face, name_unicode);
} else {
DCHECK_EQ(base_encoding, FontEncoding::kMacRoman);
uint32_t maccode = CharCodeFromUnicodeForFreetypeEncoding(
FT_ENCODING_APPLE_ROMAN, name_unicode);
index = maccode ? FT_Get_Char_Index(face, maccode)
: FT_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 !BUILDFLAG(IS_APPLE)
} else if (unicode == 0xa5) {
unicode = 0x5c;
#endif
}
}
if (!face)
return unicode;
int err = FXFT_Select_Charmap(face, FT_ENCODING_UNICODE);
if (err) {
int i;
for (i = 0; i < face->num_charmaps; i++) {
uint32_t ret = CharCodeFromUnicodeForFreetypeEncoding(
FXFT_Get_Charmap_Encoding(face->charmaps[i]),
static_cast<wchar_t>(charcode));
if (ret == 0)
continue;
FT_Set_Charmap(face, face->charmaps[i]);
unicode = static_cast<wchar_t>(ret);
break;
}
if (i == face->num_charmaps && i) {
FT_Set_Charmap(face, face->charmaps[0]);
unicode = static_cast<wchar_t>(charcode);
}
}
if (face->charmap) {
int index = GetGlyphIndex(unicode, pVertGlyph);
return index != 0 ? index : -1;
}
return unicode;
}
if (!m_Font.GetFaceRec())
return -1;
uint16_t cid = CIDFromCharCode(charcode);
if (!m_pStreamAcc) {
if (m_FontType == CIDFontType::kType1)
return cid;
if (m_pFontFile && m_pCMap->IsDirectCharcodeToCIDTableIsEmpty())
return cid;
FT_CharMap charmap = m_Font.GetFaceRec()->charmap;
if (!charmap || m_pCMap->GetCoding() == CIDCoding::kUNKNOWN)
return cid;
if (FXFT_Get_Charmap_Encoding(charmap) == FT_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;
pdfium::span<const uint8_t> span = m_pStreamAcc->GetSpan().subspan(byte_pos);
return span[0] * 256 + span[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::kUNKNOWN;
}
void CPDF_CIDFont::LoadSubstFont() {
FX_SAFE_INT32 safeStemV(m_StemV);
safeStemV *= 5;
m_Font.LoadSubst(m_BaseFontName, m_FontType == CIDFontType::kTrueType,
m_Flags, safeStemV.ValueOrDefault(FXFONT_FW_NORMAL),
m_ItalicAngle, kCharsetCodePages[m_Charset],
IsVertWriting());
}
// static
float CPDF_CIDFont::CIDTransformToFloat(uint8_t ch) {
return (ch < 128 ? ch : ch - 255) * (1.0f / 127);
}
void CPDF_CIDFont::LoadGB2312() {
m_BaseFontName = m_pFontDict->GetByteStringFor("BaseFont");
m_Charset = CIDSET_GB1;
auto* pFontGlobals = CPDF_FontGlobals::GetInstance();
m_pCMap = pFontGlobals->GetPredefinedCMap("GBK-EUC-H");
m_pCID2UnicodeMap = pFontGlobals->GetCID2UnicodeMap(m_Charset);
RetainPtr<const CPDF_Dictionary> pFontDesc =
m_pFontDict->GetDictFor("FontDescriptor");
if (pFontDesc)
LoadFontDescriptor(pFontDesc.Get());
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 = kJapan1VerticalCIDs + std::size(kJapan1VerticalCIDs);
const auto* pTransform = std::lower_bound(
kJapan1VerticalCIDs, pEnd, cid,
[](const CIDTransform& entry, uint16_t cid) { return entry.cid < cid; });
return (pTransform < pEnd && cid == pTransform->cid) ? &pTransform->a
: nullptr;
}