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pdfium / pdfium / 5da0e90faa40079145dc146f70bf186d3ad5e93f / . / core / fpdfapi / font / cpdf_cidfont.cpp
blob: 3d6a34e6757f315e4487bcdda505114e61d3ad4b [file] [log] [blame]
// 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 <array>
#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/check.h"
#include "core/fxcrt/check_op.h"
#include "core/fxcrt/fixed_size_data_vector.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/span.h"
#include "core/fxcrt/span_util.h"
#include "core/fxcrt/stl_util.h"
#include "core/fxge/fx_font.h"
namespace {
struct LowHighVal {
int low;
int high;
int val;
};
struct LowHighValXY : LowHighVal {
int x;
int y;
};
bool IsMetricForCID(const LowHighVal& val, uint16_t cid) {
return val.low <= cid && cid <= val.high;
}
constexpr std::array<FX_CodePage, CIDSET_NUM_SETS> kCharsetCodePages = {
FX_CodePage::kDefANSI,
FX_CodePage::kChineseSimplified,
FX_CodePage::kChineseTraditional,
FX_CodePage::kShiftJIS,
FX_CodePage::kHangul,
FX_CodePage::kUTF16LE,
};
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},
};
#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 = fxcmap::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 = fxcmap::CharCodeFromCID(pEmbedMap, i);
if (charCode) {
return charCode;
}
}
}
return 0;
}
#endif // !BUILDFLAG(IS_WIN)
void UseCIDCharmap(const RetainPtr<CFX_Face>& face, CIDCoding coding) {
fxge::FontEncoding encoding;
switch (coding) {
case CIDCoding::kGB:
encoding = fxge::FontEncoding::kGB2312;
break;
case CIDCoding::kBIG5:
encoding = fxge::FontEncoding::kBig5;
break;
case CIDCoding::kJIS:
encoding = fxge::FontEncoding::kSjis;
break;
case CIDCoding::kKOREA:
encoding = fxge::FontEncoding::kJohab;
break;
default:
encoding = fxge::FontEncoding::kUnicode;
}
bool result = face->SelectCharMap(encoding);
if (!result) {
result = face->SelectCharMap(fxge::FontEncoding::kUnicode);
}
if (!result && face->GetCharMapCount()) {
face->SetCharMapByIndex(0);
}
}
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* document,
RetainPtr<CPDF_Dictionary> font_dict)
: CPDF_Font(document, std::move(font_dict)) {
for (size_t i = 0; i < std::size(char_bbox_); ++i) {
char_bbox_[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 cmap_ ? cmap_->CIDFromCharCode(charcode)
: static_cast<uint16_t>(charcode);
}
bool CPDF_CIDFont::IsVertWriting() const {
return cmap_ && cmap_->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 (cmap_->GetCoding()) {
case CIDCoding::kUCS2:
case CIDCoding::kUTF16:
return static_cast<wchar_t>(charcode);
case CIDCoding::kCID:
if (!cid2unicode_map_ || !cid2unicode_map_->IsLoaded()) {
return 0;
}
return cid2unicode_map_->UnicodeFromCID(static_cast<uint16_t>(charcode));
default:
break;
}
if (cid2unicode_map_ && cid2unicode_map_->IsLoaded() && cmap_->IsLoaded()) {
return cid2unicode_map_->UnicodeFromCID(CIDFromCharCode(charcode));
}
#if BUILDFLAG(IS_WIN)
uint8_t sequence[2] = {};
const int charsize = charcode < 256 ? 1 : 2;
if (charsize == 1) {
sequence[0] = charcode;
} else {
sequence[0] = charcode / 256;
sequence[1] = charcode % 256;
}
wchar_t unicode;
size_t ret = FX_MultiByteToWideChar(
kCharsetCodePages[static_cast<size_t>(cmap_->GetCoding())],
ByteStringView(
pdfium::span(sequence).first(static_cast<size_t>(charsize))),
pdfium::span_from_ref(unicode));
return ret == 1 ? unicode : 0;
#else
if (!cmap_->GetEmbedMap()) {
return 0;
}
return EmbeddedUnicodeFromCharcode(cmap_->GetEmbedMap(), cmap_->GetCharset(),
charcode);
#endif
}
uint32_t CPDF_CIDFont::CharCodeFromUnicode(wchar_t unicode) const {
uint32_t charcode = CPDF_Font::CharCodeFromUnicode(unicode);
if (charcode) {
return charcode;
}
switch (cmap_->GetCoding()) {
case CIDCoding::kUNKNOWN:
return 0;
case CIDCoding::kUCS2:
case CIDCoding::kUTF16:
return unicode;
case CIDCoding::kCID: {
if (!cid2unicode_map_ || !cid2unicode_map_->IsLoaded()) {
return 0;
}
uint32_t cid = 0;
while (cid < 65536) {
wchar_t this_unicode =
cid2unicode_map_->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 (cmap_->GetCoding() == CIDCoding::kCID) {
return 0;
}
#if BUILDFLAG(IS_WIN)
uint8_t buffer[32];
size_t ret = FX_WideCharToMultiByte(
kCharsetCodePages[static_cast<size_t>(cmap_->GetCoding())],
WideStringView(unicode),
pdfium::as_writable_chars(pdfium::span(buffer).first(4u)));
if (ret == 1) {
return buffer[0];
}
if (ret == 2) {
return buffer[0] * 256 + buffer[1];
}
#else
if (cmap_->GetEmbedMap()) {
return EmbeddedCharcodeFromUnicode(cmap_->GetEmbedMap(),
cmap_->GetCharset(), unicode);
}
#endif
return 0;
}
bool CPDF_CIDFont::Load() {
if (font_dict_->GetByteStringFor("Subtype") == "TrueType") {
LoadGB2312();
return true;
}
RetainPtr<const CPDF_Array> fonts =
font_dict_->GetArrayFor("DescendantFonts");
if (!fonts || fonts->size() != 1) {
return false;
}
RetainPtr<const CPDF_Dictionary> pCIDFontDict = fonts->GetDictAt(0);
if (!pCIDFontDict) {
return false;
}
base_font_name_ = pCIDFontDict->GetByteStringFor("BaseFont");
if ((base_font_name_ == "CourierStd" ||
base_font_name_ == "CourierStd-Bold" ||
base_font_name_ == "CourierStd-BoldOblique" ||
base_font_name_ == "CourierStd-Oblique") &&
!IsEmbedded()) {
adobe_courier_std_ = true;
}
RetainPtr<const CPDF_Object> pEncoding =
font_dict_->GetDirectObjectFor("Encoding");
if (!pEncoding) {
return false;
}
ByteString subtype = pCIDFontDict->GetByteStringFor("Subtype");
font_type_ =
subtype == "CIDFontType0" ? CIDFontType::kType1 : CIDFontType::kTrueType;
if (!pEncoding->IsName() && !pEncoding->IsStream()) {
return false;
}
auto* font_globals = 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();
cmap_ = pdfium::MakeRetain<CPDF_CMap>(span);
} else {
DCHECK(pEncoding->IsName());
ByteString cmap = pEncoding->GetString();
cmap_ = font_globals->GetPredefinedCMap(cmap);
}
RetainPtr<const CPDF_Dictionary> font_desc =
pCIDFontDict->GetDictFor("FontDescriptor");
if (font_desc) {
LoadFontDescriptor(font_desc.Get());
}
charset_ = cmap_->GetCharset();
if (charset_ == CIDSET_UNKNOWN) {
RetainPtr<const CPDF_Dictionary> pCIDInfo =
pCIDFontDict->GetDictFor("CIDSystemInfo");
if (pCIDInfo) {
charset_ = CPDF_CMapParser::CharsetFromOrdering(
pCIDInfo->GetByteStringFor("Ordering").AsStringView());
}
}
if (charset_ != CIDSET_UNKNOWN) {
cid2unicode_map_ = font_globals->GetCID2UnicodeMap(charset_);
}
RetainPtr<CFX_Face> face = font_.GetFace();
if (face) {
if (font_type_ == CIDFontType::kType1) {
face->SelectCharMap(fxge::FontEncoding::kUnicode);
} else {
UseCIDCharmap(face, cmap_->GetCoding());
}
}
default_width_ = pCIDFontDict->GetIntegerFor("DW", 1000);
RetainPtr<const CPDF_Array> pWidthArray = pCIDFontDict->GetArrayFor("W");
if (pWidthArray) {
LoadMetricsArray(std::move(pWidthArray), &width_list_, 1);
}
if (!IsEmbedded()) {
LoadSubstFont();
}
RetainPtr<const CPDF_Object> pmap =
pCIDFontDict->GetDirectObjectFor("CIDToGIDMap");
if (pmap) {
RetainPtr<const CPDF_Stream> pMapStream(pmap->AsStream());
if (pMapStream) {
stream_acc_ = pdfium::MakeRetain<CPDF_StreamAcc>(std::move(pMapStream));
stream_acc_->LoadAllDataFiltered();
} else if (font_file_ && pmap->IsName() &&
pmap->GetString() == "Identity") {
cid_is_gid_ = true;
}
}
CheckFontMetrics();
if (IsVertWriting()) {
RetainPtr<const CPDF_Array> pWidth2Array = pCIDFontDict->GetArrayFor("W2");
if (pWidth2Array) {
LoadMetricsArray(std::move(pWidth2Array), &vert_metrics_, 3);
}
RetainPtr<const CPDF_Array> pDefaultArray =
pCIDFontDict->GetArrayFor("DW2");
if (pDefaultArray) {
default_vy_ = pDefaultArray->GetIntegerAt(0);
default_w1_ = pDefaultArray->GetIntegerAt(1);
}
}
// TODO(thestig): Better identify font types and identify more font types.
if (font_type_ == CIDFontType::kTrueType && IsEmbedded()) {
font_.SetFontType(CFX_Font::FontType::kCIDTrueType);
}
return true;
}
FX_RECT CPDF_CIDFont::GetCharBBox(uint32_t charcode) {
if (charcode < 256 && char_bbox_[charcode].right != -1) {
return char_bbox_[charcode];
}
FX_RECT rect;
bool bVert = false;
int glyph_index = GlyphFromCharCode(charcode, &bVert);
RetainPtr<CFX_Face> face = font_.GetFace();
if (face) {
rect = face->GetCharBBox(charcode, glyph_index);
}
if (!font_file_ && charset_ == CIDSET_JAPAN1) {
uint16_t cid = CIDFromCharCode(charcode);
const CIDTransform* pTransform = GetCIDTransform(cid);
if (pTransform && !bVert) {
CFX_Matrix matrix(CIDTransformToFloat(pTransform->a),
CIDTransformToFloat(pTransform->b),
CIDTransformToFloat(pTransform->c),
CIDTransformToFloat(pTransform->d),
CIDTransformToFloat(pTransform->e) * 1000,
CIDTransformToFloat(pTransform->f) * 1000);
rect = matrix.TransformRect(CFX_FloatRect(rect)).GetOuterRect();
}
}
if (charcode < 256) {
char_bbox_[charcode] = rect;
}
return rect;
}
int CPDF_CIDFont::GetCharWidthF(uint32_t charcode) {
if (charcode < 0x80 && ansi_widths_fixed_) {
return (charcode >= 32 && charcode < 127) ? 500 : 0;
}
uint16_t cid = CIDFromCharCode(charcode);
auto lhv_span =
fxcrt::reinterpret_span<const LowHighVal>(pdfium::span(width_list_));
for (const auto& lhv : lhv_span) {
if (IsMetricForCID(lhv, cid)) {
return lhv.val;
}
}
return default_width_;
}
int16_t CPDF_CIDFont::GetVertWidth(uint16_t cid) const {
auto lhvxy_span =
fxcrt::reinterpret_span<const LowHighValXY>(pdfium::span(vert_metrics_));
for (const auto& lhvxy : lhvxy_span) {
if (IsMetricForCID(lhvxy, cid)) {
return lhvxy.val;
}
}
return default_w1_;
}
CFX_Point16 CPDF_CIDFont::GetVertOrigin(uint16_t cid) const {
auto lhvxy_span =
fxcrt::reinterpret_span<const LowHighValXY>(pdfium::span(vert_metrics_));
for (const auto& lhvxy : lhvxy_span) {
if (IsMetricForCID(lhvxy, cid)) {
return {static_cast<int16_t>(lhvxy.x), static_cast<int16_t>(lhvxy.y)};
}
}
int width = default_width_;
auto lhv_span =
fxcrt::reinterpret_span<const LowHighVal>(pdfium::span(width_list_));
for (const auto& lhv : lhv_span) {
if (IsMetricForCID(lhv, cid)) {
width = lhv.val;
break;
}
}
return {static_cast<int16_t>(width / 2), default_vy_};
}
int CPDF_CIDFont::GetGlyphIndex(uint32_t unicode, bool* pVertGlyph) {
if (pVertGlyph) {
*pVertGlyph = false;
}
int index = font_.GetFace()->GetCharIndex(unicode);
if (unicode == pdfium::unicode::kBoxDrawingsLightVerical) {
return index;
}
if (!index || !IsVertWriting()) {
return index;
}
if (ttg_subtable_) {
return GetVerticalGlyph(index, pVertGlyph);
}
static constexpr uint32_t kGsubTag =
CFX_FontMapper::MakeTag('G', 'S', 'U', 'B');
RetainPtr<CFX_Face> face = font_.GetFace();
size_t length = face->GetSfntTable(kGsubTag, {});
if (!length) {
return index;
}
auto sub_data = FixedSizeDataVector<uint8_t>::Uninit(length);
if (!face->GetSfntTable(kGsubTag, sub_data.span())) {
return index;
}
// CFX_CTTGSUBTable parses the data and stores all the values in its structs.
// It does not store pointers into `sub_data`.
ttg_subtable_ = std::make_unique<CFX_CTTGSUBTable>(sub_data.span());
return GetVerticalGlyph(index, pVertGlyph);
}
int CPDF_CIDFont::GetVerticalGlyph(int index, bool* pVertGlyph) {
uint32_t vindex = ttg_subtable_->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 (!font_file_ && (!stream_acc_ || cid2unicode_map_)) {
uint16_t cid = CIDFromCharCode(charcode);
wchar_t unicode = 0;
if (cid_is_gid_) {
#if BUILDFLAG(IS_APPLE)
if (FontStyleIsSymbolic(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 && cid2unicode_map_ && cid2unicode_map_->IsLoaded()) {
unicode = cid2unicode_map_->UnicodeFromCID(cid);
}
if (unicode == 0) {
unicode = GetUnicodeFromCharCode(charcode);
}
if (unicode == 0) {
WideString unicode_str = UnicodeFromCharCode(charcode);
if (!unicode_str.IsEmpty()) {
unicode = unicode_str[0];
}
}
}
if (unicode == 0) {
if (!adobe_courier_std_) {
return charcode ? static_cast<int>(charcode) : -1;
}
charcode += 31;
RetainPtr<CFX_Face> face = font_.GetFace();
bool bMSUnicode = UseTTCharmapUnicode(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 face->GetCharIndex(name_unicode);
}
if (base_encoding == FontEncoding::kWinAnsi) {
index = face->GetCharIndex(name_unicode);
} else {
DCHECK_EQ(base_encoding, FontEncoding::kMacRoman);
uint32_t maccode = CharCodeFromUnicodeForEncoding(
fxge::FontEncoding::kAppleRoman, name_unicode);
index =
maccode ? face->GetCharIndex(maccode) : face->GetNameIndex(name);
}
if (index == 0 || index == 0xffff) {
return charcode ? static_cast<int>(charcode) : -1;
}
return index;
}
if (charset_ == CIDSET_JAPAN1) {
if (unicode == '\\') {
unicode = '/';
#if !BUILDFLAG(IS_APPLE)
} else if (unicode == 0xa5) {
unicode = 0x5c;
#endif
}
}
RetainPtr<CFX_Face> face = font_.GetFace();
if (!face) {
return unicode;
}
size_t num_charmaps = face->GetCharMapCount();
if (!face->SelectCharMap(fxge::FontEncoding::kUnicode)) {
size_t i;
for (i = 0; i < num_charmaps; i++) {
uint32_t ret = CharCodeFromUnicodeForEncoding(
face->GetCharMapEncodingByIndex(i), static_cast<wchar_t>(charcode));
if (ret == 0) {
continue;
}
face->SetCharMapByIndex(i);
unicode = static_cast<wchar_t>(ret);
break;
}
if (i == num_charmaps && i) {
face->SetCharMapByIndex(0);
unicode = static_cast<wchar_t>(charcode);
}
}
if (num_charmaps) {
int index = GetGlyphIndex(unicode, pVertGlyph);
return index != 0 ? index : -1;
}
return unicode;
}
RetainPtr<CFX_Face> face = font_.GetFace();
if (!face) {
return -1;
}
uint16_t cid = CIDFromCharCode(charcode);
if (!stream_acc_) {
if (font_type_ == CIDFontType::kType1) {
return cid;
}
if (font_file_ && cmap_->IsDirectCharcodeToCIDTableIsEmpty()) {
return cid;
}
if (cmap_->GetCoding() == CIDCoding::kUNKNOWN) {
return cid;
}
std::optional<fxge::FontEncoding> charmap =
face->GetCurrentCharMapEncoding();
if (!charmap.has_value()) {
return cid;
}
if (charmap.value() == fxge::FontEncoding::kUnicode) {
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 > stream_acc_->GetSize()) {
return -1;
}
pdfium::span<const uint8_t> span = stream_acc_->GetSpan().subspan(byte_pos);
return span[0] * 256 + span[1];
}
uint32_t CPDF_CIDFont::GetNextChar(ByteStringView pString,
size_t* pOffset) const {
return cmap_->GetNextChar(pString, pOffset);
}
int CPDF_CIDFont::GetCharSize(uint32_t charcode) const {
return cmap_->GetCharSize(charcode);
}
size_t CPDF_CIDFont::CountChar(ByteStringView pString) const {
return cmap_->CountChar(pString);
}
void CPDF_CIDFont::AppendChar(ByteString* str, uint32_t charcode) const {
cmap_->AppendChar(str, charcode);
}
bool CPDF_CIDFont::IsUnicodeCompatible() const {
if (cid2unicode_map_ && cid2unicode_map_->IsLoaded() && cmap_->IsLoaded()) {
return true;
}
return cmap_->GetCoding() != CIDCoding::kUNKNOWN;
}
void CPDF_CIDFont::LoadSubstFont() {
FX_SAFE_INT32 safe_stem_v(stem_v_);
safe_stem_v *= 5;
font_.LoadSubst(base_font_name_, font_type_ == CIDFontType::kTrueType, flags_,
safe_stem_v.ValueOrDefault(pdfium::kFontWeightNormal),
italic_angle_, kCharsetCodePages[charset_], IsVertWriting());
}
// static
float CPDF_CIDFont::CIDTransformToFloat(uint8_t ch) {
return (ch < 128 ? ch : ch - 255) * (1.0f / 127);
}
void CPDF_CIDFont::LoadGB2312() {
base_font_name_ = font_dict_->GetByteStringFor("BaseFont");
charset_ = CIDSET_GB1;
auto* font_globals = CPDF_FontGlobals::GetInstance();
cmap_ = font_globals->GetPredefinedCMap("GBK-EUC-H");
cid2unicode_map_ = font_globals->GetCID2UnicodeMap(charset_);
RetainPtr<const CPDF_Dictionary> font_desc =
font_dict_->GetDictFor("FontDescriptor");
if (font_desc) {
LoadFontDescriptor(font_desc.Get());
}
if (!IsEmbedded()) {
LoadSubstFont();
}
CheckFontMetrics();
ansi_widths_fixed_ = true;
}
const CIDTransform* CPDF_CIDFont::GetCIDTransform(uint16_t cid) const {
if (charset_ != CIDSET_JAPAN1 || font_file_) {
return nullptr;
}
const auto* pBegin = std::begin(kJapan1VerticalCIDs);
const auto* pEnd = std::end(kJapan1VerticalCIDs);
const auto* pTransform = std::lower_bound(
pBegin, pEnd, cid,
[](const CIDTransform& entry, uint16_t cid) { return entry.cid < cid; });
return pTransform < pEnd && cid == pTransform->cid ? pTransform : nullptr;
}