Google Git
Sign in
pdfium / pdfium / refs/heads/chromium/6697 / . / xfa / fgas / font / cfgas_fontmgr.cpp
blob: 8c01e595b7ad89b500176c01d8a7aa18318f4ab0 [file] [log] [blame] [edit]
// Copyright 2015 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 "xfa/fgas/font/cfgas_fontmgr.h"
#include <stdint.h>
#include <algorithm>
#include <array>
#include <iterator>
#include <memory>
#include <type_traits>
#include <utility>
#include "build/build_config.h"
#include "core/fxcrt/byteorder.h"
#include "core/fxcrt/cfx_read_only_vector_stream.h"
#include "core/fxcrt/check.h"
#include "core/fxcrt/compiler_specific.h"
#include "core/fxcrt/containers/contains.h"
#include "core/fxcrt/data_vector.h"
#include "core/fxcrt/fixed_size_data_vector.h"
#include "core/fxcrt/fx_codepage.h"
#include "core/fxcrt/fx_extension.h"
#include "core/fxcrt/fx_memcpy_wrappers.h"
#include "core/fxcrt/fx_system.h"
#include "core/fxcrt/numerics/safe_conversions.h"
#include "core/fxcrt/span.h"
#include "core/fxcrt/stl_util.h"
#include "core/fxge/cfx_font.h"
#include "core/fxge/cfx_fontmapper.h"
#include "core/fxge/cfx_fontmgr.h"
#include "core/fxge/cfx_gemodule.h"
#include "core/fxge/fx_font.h"
#include "core/fxge/fx_fontencoding.h"
#include "xfa/fgas/font/cfgas_gefont.h"
#include "xfa/fgas/font/fgas_fontutils.h"
#if BUILDFLAG(IS_WIN)
#include "core/fxcrt/win/win_util.h"
#endif
namespace {
bool VerifyUnicode(const RetainPtr<CFGAS_GEFont>& pFont, wchar_t wcUnicode) {
RetainPtr<CFX_Face> pFace = pFont->GetDevFont()->GetFace();
if (!pFace)
return false;
CFX_Face::CharMap charmap = pFace->GetCurrentCharMap();
if (!pFace->SelectCharMap(fxge::FontEncoding::kUnicode)) {
return false;
}
if (pFace->GetCharIndex(wcUnicode) == 0) {
pFace->SetCharMap(charmap);
return false;
}
return true;
}
uint32_t ShortFormHash(FX_CodePage wCodePage,
uint32_t dwFontStyles,
WideStringView wsFontFamily) {
ByteString bsHash = ByteString::Format("%d, %d", wCodePage, dwFontStyles);
bsHash += FX_UTF8Encode(wsFontFamily);
return FX_HashCode_GetA(bsHash.AsStringView());
}
uint32_t LongFormHash(FX_CodePage wCodePage,
uint16_t wBitField,
uint32_t dwFontStyles,
WideStringView wsFontFamily) {
ByteString bsHash =
ByteString::Format("%d, %d, %d", wCodePage, wBitField, dwFontStyles);
bsHash += FX_UTF8Encode(wsFontFamily);
return FX_HashCode_GetA(bsHash.AsStringView());
}
} // namespace
#if BUILDFLAG(IS_WIN)
namespace {
struct FX_FONTMATCHPARAMS {
const wchar_t* pwsFamily;
uint32_t dwFontStyles;
uint32_t dwUSB;
bool matchParagraphStyle;
wchar_t wUnicode;
FX_CodePage wCodePage;
};
int32_t GetSimilarityScore(FX_FONTDESCRIPTOR const* pFont,
uint32_t dwFontStyles) {
int32_t iValue = 0;
if (FontStyleIsSymbolic(dwFontStyles) ==
FontStyleIsSymbolic(pFont->dwFontStyles)) {
iValue += 64;
}
if (FontStyleIsFixedPitch(dwFontStyles) ==
FontStyleIsFixedPitch(pFont->dwFontStyles)) {
iValue += 32;
}
if (FontStyleIsSerif(dwFontStyles) == FontStyleIsSerif(pFont->dwFontStyles))
iValue += 16;
if (FontStyleIsScript(dwFontStyles) == FontStyleIsScript(pFont->dwFontStyles))
iValue += 8;
return iValue;
}
const FX_FONTDESCRIPTOR* MatchDefaultFont(
FX_FONTMATCHPARAMS* pParams,
const std::deque<FX_FONTDESCRIPTOR>& fonts) {
const FX_FONTDESCRIPTOR* pBestFont = nullptr;
int32_t iBestSimilar = 0;
for (const auto& font : fonts) {
if (FontStyleIsForceBold(font.dwFontStyles) &&
FontStyleIsItalic(font.dwFontStyles)) {
continue;
}
if (pParams->pwsFamily) {
if (FXSYS_wcsicmp(pParams->pwsFamily, font.wsFontFace))
continue;
if (font.uCharSet == FX_Charset::kSymbol)
return &font;
}
if (font.uCharSet == FX_Charset::kSymbol)
continue;
if (pParams->wCodePage != FX_CodePage::kFailure) {
if (FX_GetCodePageFromCharset(font.uCharSet) != pParams->wCodePage)
continue;
} else {
if (pParams->dwUSB < 128) {
uint32_t dwByte = pParams->dwUSB / 32;
uint32_t dwUSB = 1 << (pParams->dwUSB % 32);
if ((font.FontSignature.fsUsb[dwByte] & dwUSB) == 0)
continue;
}
}
if (pParams->matchParagraphStyle) {
if ((font.dwFontStyles & 0x0F) == (pParams->dwFontStyles & 0x0F))
return &font;
continue;
}
if (pParams->pwsFamily) {
if (FXSYS_wcsicmp(pParams->pwsFamily, font.wsFontFace) == 0)
return &font;
}
int32_t iSimilarValue = GetSimilarityScore(&font, pParams->dwFontStyles);
if (iBestSimilar < iSimilarValue) {
iBestSimilar = iSimilarValue;
pBestFont = &font;
}
}
return iBestSimilar < 1 ? nullptr : pBestFont;
}
uint32_t GetGdiFontStyles(const LOGFONTW& lf) {
uint32_t dwStyles = 0;
if ((lf.lfPitchAndFamily & 0x03) == FIXED_PITCH)
dwStyles |= FXFONT_FIXED_PITCH;
uint8_t nFamilies = lf.lfPitchAndFamily & 0xF0;
if (nFamilies == FF_ROMAN)
dwStyles |= FXFONT_SERIF;
if (nFamilies == FF_SCRIPT)
dwStyles |= FXFONT_SCRIPT;
if (lf.lfCharSet == SYMBOL_CHARSET)
dwStyles |= FXFONT_SYMBOLIC;
return dwStyles;
}
int32_t CALLBACK GdiFontEnumProc(ENUMLOGFONTEX* lpelfe,
NEWTEXTMETRICEX* lpntme,
DWORD dwFontType,
LPARAM lParam) {
if (dwFontType != TRUETYPE_FONTTYPE)
return 1;
const LOGFONTW& lf = ((LPENUMLOGFONTEXW)lpelfe)->elfLogFont;
if (lf.lfFaceName[0] == L'@')
return 1;
FX_FONTDESCRIPTOR font = {}; // Aggregate initialization.
static_assert(std::is_aggregate_v<decltype(font)>);
font.uCharSet = FX_GetCharsetFromInt(lf.lfCharSet);
font.dwFontStyles = GetGdiFontStyles(lf);
UNSAFE_TODO({
FXSYS_wcsncpy(font.wsFontFace, (const wchar_t*)lf.lfFaceName, 31);
font.wsFontFace[31] = 0;
FXSYS_memcpy(&font.FontSignature, &lpntme->ntmFontSig,
sizeof(lpntme->ntmFontSig));
});
reinterpret_cast<std::deque<FX_FONTDESCRIPTOR>*>(lParam)->push_back(font);
return 1;
}
std::deque<FX_FONTDESCRIPTOR> EnumGdiFonts(const wchar_t* pwsFaceName,
wchar_t wUnicode) {
std::deque<FX_FONTDESCRIPTOR> fonts;
if (!pdfium::IsUser32AndGdi32Available()) {
// Without GDI32 and User32, GetDC / EnumFontFamiliesExW / ReleaseDC all
// fail.
return fonts;
}
LOGFONTW lfFind = {}; // Aggregate initialization.
static_assert(std::is_aggregate_v<decltype(lfFind)>);
lfFind.lfCharSet = DEFAULT_CHARSET;
if (pwsFaceName) {
UNSAFE_TODO({
FXSYS_wcsncpy(lfFind.lfFaceName, pwsFaceName, 31);
lfFind.lfFaceName[31] = 0;
});
}
HDC hDC = ::GetDC(nullptr);
EnumFontFamiliesExW(hDC, (LPLOGFONTW)&lfFind, (FONTENUMPROCW)GdiFontEnumProc,
(LPARAM)&fonts, 0);
::ReleaseDC(nullptr, hDC);
return fonts;
}
} // namespace
CFGAS_FontMgr::CFGAS_FontMgr() : m_FontFaces(EnumGdiFonts(nullptr, 0xFEFF)) {}
CFGAS_FontMgr::~CFGAS_FontMgr() = default;
bool CFGAS_FontMgr::EnumFonts() {
return true;
}
RetainPtr<CFGAS_GEFont> CFGAS_FontMgr::GetFontByUnicodeImpl(
wchar_t wUnicode,
uint32_t dwFontStyles,
const wchar_t* pszFontFamily,
uint32_t dwHash,
FX_CodePage wCodePage,
uint16_t wBitField) {
const FX_FONTDESCRIPTOR* pFD = FindFont(pszFontFamily, dwFontStyles, false,
wCodePage, wBitField, wUnicode);
if (!pFD && pszFontFamily) {
pFD =
FindFont(nullptr, dwFontStyles, false, wCodePage, wBitField, wUnicode);
}
if (!pFD)
return nullptr;
FX_CodePage newCodePage = FX_GetCodePageFromCharset(pFD->uCharSet);
RetainPtr<CFGAS_GEFont> pFont =
CFGAS_GEFont::LoadFont(pFD->wsFontFace, dwFontStyles, newCodePage);
if (!pFont)
return nullptr;
pFont->SetLogicalFontStyle(dwFontStyles);
if (!VerifyUnicode(pFont, wUnicode)) {
m_FailedUnicodesSet.insert(wUnicode);
return nullptr;
}
m_Hash2Fonts[dwHash].push_back(pFont);
return pFont;
}
const FX_FONTDESCRIPTOR* CFGAS_FontMgr::FindFont(const wchar_t* pszFontFamily,
uint32_t dwFontStyles,
bool matchParagraphStyle,
FX_CodePage wCodePage,
uint32_t dwUSB,
wchar_t wUnicode) {
FX_FONTMATCHPARAMS params = {}; // Aggregate initialization.
static_assert(std::is_aggregate_v<decltype(params)>);
params.dwUSB = dwUSB;
params.wUnicode = wUnicode;
params.wCodePage = wCodePage;
params.pwsFamily = pszFontFamily;
params.dwFontStyles = dwFontStyles;
params.matchParagraphStyle = matchParagraphStyle;
const FX_FONTDESCRIPTOR* pDesc = MatchDefaultFont(&params, m_FontFaces);
if (pDesc)
return pDesc;
if (!pszFontFamily)
return nullptr;
// Use a named object to store the returned value of EnumGdiFonts() instead
// of using a temporary object. This can prevent use-after-free issues since
// pDesc may point to one of std::deque object's elements.
std::deque<FX_FONTDESCRIPTOR> namedFonts =
EnumGdiFonts(pszFontFamily, wUnicode);
params.pwsFamily = nullptr;
pDesc = MatchDefaultFont(&params, namedFonts);
if (!pDesc)
return nullptr;
auto it = std::find(m_FontFaces.rbegin(), m_FontFaces.rend(), *pDesc);
if (it != m_FontFaces.rend())
return &*it;
m_FontFaces.push_back(*pDesc);
return &m_FontFaces.back();
}
#else // BUILDFLAG(IS_WIN)
namespace {
constexpr auto kCodePages =
fxcrt::ToArray<const FX_CodePage>({FX_CodePage::kMSWin_WesternEuropean,
FX_CodePage::kMSWin_EasternEuropean,
FX_CodePage::kMSWin_Cyrillic,
FX_CodePage::kMSWin_Greek,
FX_CodePage::kMSWin_Turkish,
FX_CodePage::kMSWin_Hebrew,
FX_CodePage::kMSWin_Arabic,
FX_CodePage::kMSWin_Baltic,
FX_CodePage::kMSWin_Vietnamese,
FX_CodePage::kDefANSI,
FX_CodePage::kDefANSI,
FX_CodePage::kDefANSI,
FX_CodePage::kDefANSI,
FX_CodePage::kDefANSI,
FX_CodePage::kDefANSI,
FX_CodePage::kDefANSI,
FX_CodePage::kMSDOS_Thai,
FX_CodePage::kShiftJIS,
FX_CodePage::kChineseSimplified,
FX_CodePage::kHangul,
FX_CodePage::kChineseTraditional,
FX_CodePage::kJohab,
FX_CodePage::kDefANSI,
FX_CodePage::kDefANSI,
FX_CodePage::kDefANSI,
FX_CodePage::kDefANSI,
FX_CodePage::kDefANSI,
FX_CodePage::kDefANSI,
FX_CodePage::kDefANSI,
FX_CodePage::kDefANSI,
FX_CodePage::kDefANSI,
FX_CodePage::kDefANSI,
FX_CodePage::kDefANSI,
FX_CodePage::kDefANSI,
FX_CodePage::kDefANSI,
FX_CodePage::kDefANSI,
FX_CodePage::kDefANSI,
FX_CodePage::kDefANSI,
FX_CodePage::kDefANSI,
FX_CodePage::kDefANSI,
FX_CodePage::kDefANSI,
FX_CodePage::kDefANSI,
FX_CodePage::kDefANSI,
FX_CodePage::kDefANSI,
FX_CodePage::kDefANSI,
FX_CodePage::kDefANSI,
FX_CodePage::kDefANSI,
FX_CodePage::kDefANSI,
FX_CodePage::kMSDOS_Greek2,
FX_CodePage::kMSDOS_Russian,
FX_CodePage::kMSDOS_Norwegian,
FX_CodePage::kMSDOS_Arabic,
FX_CodePage::kMSDOS_FrenchCanadian,
FX_CodePage::kMSDOS_Hebrew,
FX_CodePage::kMSDOS_Icelandic,
FX_CodePage::kMSDOS_Portuguese,
FX_CodePage::kMSDOS_Turkish,
FX_CodePage::kMSDOS_Cyrillic,
FX_CodePage::kMSDOS_EasternEuropean,
FX_CodePage::kMSDOS_Baltic,
FX_CodePage::kMSDOS_Greek1,
FX_CodePage::kArabic_ASMO708,
FX_CodePage::kMSDOS_WesternEuropean,
FX_CodePage::kMSDOS_US});
uint16_t FX_GetCodePageBit(FX_CodePage wCodePage) {
for (size_t i = 0; i < kCodePages.size(); ++i) {
if (kCodePages[i] == wCodePage) {
return static_cast<uint16_t>(i);
}
}
return static_cast<uint16_t>(-1);
}
uint16_t FX_GetUnicodeBit(wchar_t wcUnicode) {
const FGAS_FONTUSB* x = FGAS_GetUnicodeBitField(wcUnicode);
return x ? x->wBitField : FGAS_FONTUSB::kNoBitField;
}
uint16_t ReadUInt16FromSpanAtOffset(pdfium::span<const uint8_t> data,
size_t offset) {
return fxcrt::GetUInt16MSBFirst(data.subspan(offset));
}
extern "C" {
unsigned long ftStreamRead(FXFT_StreamRec* stream,
unsigned long offset,
unsigned char* buffer,
unsigned long count) {
if (count == 0)
return 0;
IFX_SeekableReadStream* pFile =
static_cast<IFX_SeekableReadStream*>(stream->descriptor.pointer);
// SAFETY: required from caller.
if (!pFile->ReadBlockAtOffset(
UNSAFE_BUFFERS(pdfium::make_span(buffer, count), offset))) {
return 0;
}
return count;
}
void ftStreamClose(FXFT_StreamRec* stream) {}
} // extern "C"
std::vector<WideString> GetNames(pdfium::span<const uint8_t> name_table) {
std::vector<WideString> results;
if (name_table.empty())
return results;
uint16_t nNameCount = ReadUInt16FromSpanAtOffset(name_table, 2);
pdfium::span<const uint8_t> str =
name_table.subspan(ReadUInt16FromSpanAtOffset(name_table, 4));
pdfium::span<const uint8_t> name_record = name_table.subspan(6);
for (uint16_t i = 0; i < nNameCount; ++i) {
uint16_t nNameID = ReadUInt16FromSpanAtOffset(name_table, i * 12 + 6);
if (nNameID != 1)
continue;
uint16_t nPlatformID = ReadUInt16FromSpanAtOffset(name_record, i * 12);
uint16_t nNameLength = ReadUInt16FromSpanAtOffset(name_record, i * 12 + 8);
uint16_t nNameOffset = ReadUInt16FromSpanAtOffset(name_record, i * 12 + 10);
if (nPlatformID != 1) {
WideString wsFamily;
for (uint16_t j = 0; j < nNameLength / 2; ++j) {
wchar_t wcTemp = ReadUInt16FromSpanAtOffset(str, nNameOffset + j * 2);
wsFamily += wcTemp;
}
results.push_back(wsFamily);
continue;
}
WideString wsFamily;
for (uint16_t j = 0; j < nNameLength; ++j) {
wchar_t wcTemp = str[nNameOffset + j];
wsFamily += wcTemp;
}
results.push_back(wsFamily);
}
return results;
}
uint32_t GetFlags(const RetainPtr<CFX_Face>& face) {
uint32_t flags = 0;
if (face->IsBold()) {
flags |= FXFONT_FORCE_BOLD;
}
if (face->IsItalic()) {
flags |= FXFONT_ITALIC;
}
if (face->IsFixedWidth()) {
flags |= FXFONT_FIXED_PITCH;
}
std::optional<std::array<uint32_t, 2>> code_page_range =
face->GetOs2CodePageRange();
if (code_page_range.has_value() && (code_page_range.value()[0] & (1 << 31))) {
flags |= FXFONT_SYMBOLIC;
}
std::optional<std::array<uint8_t, 2>> panose = face->GetOs2Panose();
if (panose.has_value() && panose.value()[0] == 2) {
uint8_t serif = panose.value()[1];
if ((serif > 1 && serif < 10) || serif > 13) {
flags |= FXFONT_SERIF;
}
}
return flags;
}
RetainPtr<IFX_SeekableReadStream> CreateFontStream(CFX_FontMapper* pFontMapper,
size_t index) {
FixedSizeDataVector<uint8_t> buffer = pFontMapper->RawBytesForIndex(index);
if (buffer.empty()) {
return nullptr;
}
return pdfium::MakeRetain<CFX_ReadOnlyVectorStream>(std::move(buffer));
}
RetainPtr<IFX_SeekableReadStream> CreateFontStream(
const ByteString& bsFaceName) {
CFX_FontMgr* pFontMgr = CFX_GEModule::Get()->GetFontMgr();
CFX_FontMapper* pFontMapper = pFontMgr->GetBuiltinMapper();
pFontMapper->LoadInstalledFonts();
for (size_t i = 0; i < pFontMapper->GetFaceSize(); ++i) {
if (pFontMapper->GetFaceName(i) == bsFaceName)
return CreateFontStream(pFontMapper, i);
}
return nullptr;
}
RetainPtr<CFX_Face> LoadFace(
const RetainPtr<IFX_SeekableReadStream>& pFontStream,
int32_t iFaceIndex) {
if (!pFontStream)
return nullptr;
CFX_FontMgr* pFontMgr = CFX_GEModule::Get()->GetFontMgr();
FXFT_LibraryRec* library = pFontMgr->GetFTLibrary();
if (!library)
return nullptr;
// TODO(palmer): This memory will be freed with |ft_free| (which is |free|).
// Ultimately, we want to change this to:
// FXFT_Stream ftStream = FX_Alloc(FXFT_StreamRec, 1);
// https://bugs.chromium.org/p/pdfium/issues/detail?id=690
FXFT_StreamRec* ftStream =
static_cast<FXFT_StreamRec*>(ft_scalloc(sizeof(FXFT_StreamRec), 1));
UNSAFE_TODO(FXSYS_memset(ftStream, 0, sizeof(FXFT_StreamRec)));
ftStream->base = nullptr;
ftStream->descriptor.pointer = static_cast<void*>(pFontStream.Get());
ftStream->pos = 0;
ftStream->size = static_cast<unsigned long>(pFontStream->GetSize());
ftStream->read = ftStreamRead;
ftStream->close = ftStreamClose;
FT_Open_Args ftArgs = {}; // Aggregate initialization.
static_assert(std::is_aggregate_v<decltype(ftArgs)>);
ftArgs.flags |= FT_OPEN_STREAM;
ftArgs.stream = ftStream;
RetainPtr<CFX_Face> pFace = CFX_Face::Open(library, &ftArgs, iFaceIndex);
if (!pFace) {
ft_sfree(ftStream);
return nullptr;
}
pFace->SetPixelSize(0, 64);
return pFace;
}
bool VerifyUnicodeForFontDescriptor(CFGAS_FontDescriptor* pDesc,
wchar_t wcUnicode) {
RetainPtr<IFX_SeekableReadStream> pFileRead =
CreateFontStream(pDesc->m_wsFaceName.ToUTF8());
if (!pFileRead)
return false;
RetainPtr<CFX_Face> pFace = LoadFace(pFileRead, pDesc->m_nFaceIndex);
if (!pFace)
return false;
bool select_charmap_result =
pFace->SelectCharMap(fxge::FontEncoding::kUnicode);
int ret_index = pFace->GetCharIndex(wcUnicode);
pFace->ClearExternalStream();
return select_charmap_result && ret_index;
}
bool IsPartName(const WideString& name1, const WideString& name2) {
return name1.Contains(name2.AsStringView());
}
int32_t CalcPenalty(CFGAS_FontDescriptor* pInstalled,
FX_CodePage wCodePage,
uint32_t dwFontStyles,
const WideString& FontName,
wchar_t wcUnicode) {
int32_t nPenalty = 30000;
if (FontName.GetLength() != 0) {
if (FontName != pInstalled->m_wsFaceName) {
size_t i;
for (i = 0; i < pInstalled->m_wsFamilyNames.size(); ++i) {
if (pInstalled->m_wsFamilyNames[i] == FontName)
break;
}
if (i == pInstalled->m_wsFamilyNames.size())
nPenalty += 0xFFFF;
else
nPenalty -= 28000;
} else {
nPenalty -= 30000;
}
if (nPenalty == 30000 && !IsPartName(pInstalled->m_wsFaceName, FontName)) {
size_t i;
for (i = 0; i < pInstalled->m_wsFamilyNames.size(); i++) {
if (IsPartName(pInstalled->m_wsFamilyNames[i], FontName))
break;
}
if (i == pInstalled->m_wsFamilyNames.size())
nPenalty += 0xFFFF;
else
nPenalty -= 26000;
} else {
nPenalty -= 27000;
}
}
uint32_t dwStyleMask = pInstalled->m_dwFontStyles ^ dwFontStyles;
if (FontStyleIsForceBold(dwStyleMask))
nPenalty += 4500;
if (FontStyleIsFixedPitch(dwStyleMask))
nPenalty += 10000;
if (FontStyleIsItalic(dwStyleMask))
nPenalty += 10000;
if (FontStyleIsSerif(dwStyleMask))
nPenalty += 500;
if (FontStyleIsSymbolic(dwStyleMask))
nPenalty += 0xFFFF;
if (nPenalty >= 0xFFFF)
return 0xFFFF;
uint16_t wBit =
(wCodePage == FX_CodePage::kDefANSI || wCodePage == FX_CodePage::kFailure)
? static_cast<uint16_t>(-1)
: FX_GetCodePageBit(wCodePage);
if (wBit != static_cast<uint16_t>(-1)) {
DCHECK(wBit < 64);
if ((pInstalled->m_dwCsb[wBit / 32] & (1 << (wBit % 32))) == 0)
nPenalty += 0xFFFF;
else
nPenalty -= 60000;
}
wBit = (wcUnicode == 0 || wcUnicode == 0xFFFE) ? FGAS_FONTUSB::kNoBitField
: FX_GetUnicodeBit(wcUnicode);
if (wBit != FGAS_FONTUSB::kNoBitField) {
DCHECK(wBit < 128);
if ((pInstalled->m_dwUsb[wBit / 32] & (1 << (wBit % 32))) == 0)
nPenalty += 0xFFFF;
else
nPenalty -= 60000;
}
return nPenalty;
}
} // namespace
CFGAS_FontDescriptor::CFGAS_FontDescriptor() = default;
CFGAS_FontDescriptor::~CFGAS_FontDescriptor() = default;
CFGAS_FontMgr::CFGAS_FontMgr() = default;
CFGAS_FontMgr::~CFGAS_FontMgr() = default;
bool CFGAS_FontMgr::EnumFontsFromFontMapper() {
CFX_FontMapper* pFontMapper =
CFX_GEModule::Get()->GetFontMgr()->GetBuiltinMapper();
pFontMapper->LoadInstalledFonts();
for (size_t i = 0; i < pFontMapper->GetFaceSize(); ++i) {
RetainPtr<IFX_SeekableReadStream> pFontStream =
CreateFontStream(pFontMapper, i);
if (!pFontStream)
continue;
WideString wsFaceName =
WideString::FromDefANSI(pFontMapper->GetFaceName(i).AsStringView());
RegisterFaces(pFontStream, wsFaceName);
}
return !m_InstalledFonts.empty();
}
bool CFGAS_FontMgr::EnumFonts() {
return EnumFontsFromFontMapper();
}
RetainPtr<CFGAS_GEFont> CFGAS_FontMgr::GetFontByUnicodeImpl(
wchar_t wUnicode,
uint32_t dwFontStyles,
const wchar_t* pszFontFamily,
uint32_t dwHash,
FX_CodePage wCodePage,
uint16_t /* wBitField*/) {
if (!pdfium::Contains(m_Hash2CandidateList, dwHash)) {
m_Hash2CandidateList[dwHash] =
MatchFonts(wCodePage, dwFontStyles, pszFontFamily, wUnicode);
}
for (const auto& info : m_Hash2CandidateList[dwHash]) {
CFGAS_FontDescriptor* pDesc = info.pFont;
if (!VerifyUnicodeForFontDescriptor(pDesc, wUnicode))
continue;
RetainPtr<CFGAS_GEFont> pFont =
LoadFontInternal(pDesc->m_wsFaceName, pDesc->m_nFaceIndex);
if (!pFont)
continue;
pFont->SetLogicalFontStyle(dwFontStyles);
m_Hash2Fonts[dwHash].push_back(pFont);
return pFont;
}
if (!pszFontFamily)
m_FailedUnicodesSet.insert(wUnicode);
return nullptr;
}
RetainPtr<CFGAS_GEFont> CFGAS_FontMgr::LoadFontInternal(
const WideString& wsFaceName,
int32_t iFaceIndex) {
RetainPtr<IFX_SeekableReadStream> pFontStream =
CreateFontStream(wsFaceName.ToUTF8());
if (!pFontStream)
return nullptr;
auto pInternalFont = std::make_unique<CFX_Font>();
if (!pInternalFont->LoadFile(std::move(pFontStream), iFaceIndex))
return nullptr;
return CFGAS_GEFont::LoadFont(std::move(pInternalFont));
}
std::vector<CFGAS_FontDescriptorInfo> CFGAS_FontMgr::MatchFonts(
FX_CodePage wCodePage,
uint32_t dwFontStyles,
const WideString& FontName,
wchar_t wcUnicode) {
std::vector<CFGAS_FontDescriptorInfo> matched_fonts;
for (const auto& pFont : m_InstalledFonts) {
int32_t nPenalty =
CalcPenalty(pFont.get(), wCodePage, dwFontStyles, FontName, wcUnicode);
if (nPenalty >= 0xffff)
continue;
matched_fonts.push_back({pFont.get(), nPenalty});
if (matched_fonts.size() == 0xffff)
break;
}
std::stable_sort(matched_fonts.begin(), matched_fonts.end());
return matched_fonts;
}
void CFGAS_FontMgr::RegisterFace(RetainPtr<CFX_Face> pFace,
const WideString& wsFaceName) {
if (!pFace->IsScalable()) {
return;
}
auto pFont = std::make_unique<CFGAS_FontDescriptor>();
pFont->m_dwFontStyles |= GetFlags(pFace);
// TODO(crbug.com/pdfium/2085): Use make_span() in fewer places after updating
// pdfium::span.
std::optional<std::array<uint32_t, 4>> unicode_range =
pFace->GetOs2UnicodeRange();
if (unicode_range.has_value()) {
fxcrt::Copy(unicode_range.value(), pFont->m_dwUsb);
} else {
fxcrt::Fill(pFont->m_dwUsb, 0);
}
std::optional<std::array<uint32_t, 2>> code_page_range =
pFace->GetOs2CodePageRange();
if (code_page_range.has_value()) {
fxcrt::Copy(code_page_range.value(), pFont->m_dwCsb);
} else {
fxcrt::Fill(pFont->m_dwCsb, 0);
}
static constexpr uint32_t kNameTag =
CFX_FontMapper::MakeTag('n', 'a', 'm', 'e');
DataVector<uint8_t> table;
size_t table_size = pFace->GetSfntTable(kNameTag, table);
if (table_size) {
table.resize(table_size);
if (!pFace->GetSfntTable(kNameTag, table)) {
table.clear();
}
}
pFont->m_wsFamilyNames = GetNames(table);
pFont->m_wsFamilyNames.push_back(
WideString::FromUTF8(pFace->GetRec()->family_name));
pFont->m_wsFaceName = wsFaceName;
pFont->m_nFaceIndex =
pdfium::checked_cast<int32_t>(pFace->GetRec()->face_index);
m_InstalledFonts.push_back(std::move(pFont));
}
void CFGAS_FontMgr::RegisterFaces(
const RetainPtr<IFX_SeekableReadStream>& pFontStream,
const WideString& wsFaceName) {
int32_t index = 0;
int32_t num_faces = 0;
do {
RetainPtr<CFX_Face> pFace = LoadFace(pFontStream, index++);
if (!pFace)
continue;
// All faces keep number of faces. It can be retrieved from any one face.
if (num_faces == 0) {
num_faces = pdfium::checked_cast<int32_t>(pFace->GetRec()->num_faces);
}
RegisterFace(pFace, wsFaceName);
pFace->ClearExternalStream();
} while (index < num_faces);
}
#endif // BUILDFLAG(IS_WIN)
RetainPtr<CFGAS_GEFont> CFGAS_FontMgr::GetFontByCodePage(
FX_CodePage wCodePage,
uint32_t dwFontStyles,
const wchar_t* pszFontFamily) {
uint32_t dwHash = ShortFormHash(wCodePage, dwFontStyles, pszFontFamily);
auto* pFontVector = &m_Hash2Fonts[dwHash];
if (!pFontVector->empty()) {
for (auto iter = pFontVector->begin(); iter != pFontVector->end(); ++iter) {
if (*iter != nullptr)
return *iter;
}
return nullptr;
}
#if BUILDFLAG(IS_WIN)
const FX_FONTDESCRIPTOR* pFD =
FindFont(pszFontFamily, dwFontStyles, true, wCodePage,
FGAS_FONTUSB::kNoBitField, 0);
if (!pFD) {
pFD = FindFont(nullptr, dwFontStyles, true, wCodePage,
FGAS_FONTUSB::kNoBitField, 0);
}
if (!pFD) {
pFD = FindFont(nullptr, dwFontStyles, false, wCodePage,
FGAS_FONTUSB::kNoBitField, 0);
}
if (!pFD)
return nullptr;
RetainPtr<CFGAS_GEFont> pFont =
CFGAS_GEFont::LoadFont(pFD->wsFontFace, dwFontStyles, wCodePage);
#else // BUILDFLAG(IS_WIN)
if (!pdfium::Contains(m_Hash2CandidateList, dwHash)) {
m_Hash2CandidateList[dwHash] =
MatchFonts(wCodePage, dwFontStyles, WideString(pszFontFamily), 0);
}
if (m_Hash2CandidateList[dwHash].empty())
return nullptr;
CFGAS_FontDescriptor* pDesc = m_Hash2CandidateList[dwHash].front().pFont;
RetainPtr<CFGAS_GEFont> pFont =
LoadFontInternal(pDesc->m_wsFaceName, pDesc->m_nFaceIndex);
#endif // BUILDFLAG(IS_WIN)
if (!pFont)
return nullptr;
pFont->SetLogicalFontStyle(dwFontStyles);
pFontVector->push_back(pFont);
return pFont;
}
RetainPtr<CFGAS_GEFont> CFGAS_FontMgr::GetFontByUnicode(
wchar_t wUnicode,
uint32_t dwFontStyles,
const wchar_t* pszFontFamily) {
if (pdfium::Contains(m_FailedUnicodesSet, wUnicode))
return nullptr;
const FGAS_FONTUSB* x = FGAS_GetUnicodeBitField(wUnicode);
FX_CodePage wCodePage = x ? x->wCodePage : FX_CodePage::kFailure;
uint16_t wBitField = x ? x->wBitField : FGAS_FONTUSB::kNoBitField;
uint32_t dwHash =
wCodePage == FX_CodePage::kFailure
? LongFormHash(wCodePage, wBitField, dwFontStyles, pszFontFamily)
: ShortFormHash(wCodePage, dwFontStyles, pszFontFamily);
for (auto& pFont : m_Hash2Fonts[dwHash]) {
if (VerifyUnicode(pFont, wUnicode))
return pFont;
}
return GetFontByUnicodeImpl(wUnicode, dwFontStyles, pszFontFamily, dwHash,
wCodePage, wBitField);
}
RetainPtr<CFGAS_GEFont> CFGAS_FontMgr::LoadFont(const wchar_t* pszFontFamily,
uint32_t dwFontStyles,
FX_CodePage wCodePage) {
#if BUILDFLAG(IS_WIN)
uint32_t dwHash = ShortFormHash(wCodePage, dwFontStyles, pszFontFamily);
std::vector<RetainPtr<CFGAS_GEFont>>* pFontArray = &m_Hash2Fonts[dwHash];
if (!pFontArray->empty())
return pFontArray->front();
const FX_FONTDESCRIPTOR* pFD =
FindFont(pszFontFamily, dwFontStyles, true, wCodePage,
FGAS_FONTUSB::kNoBitField, 0);
if (!pFD) {
pFD = FindFont(pszFontFamily, dwFontStyles, false, wCodePage,
FGAS_FONTUSB::kNoBitField, 0);
}
if (!pFD)
return nullptr;
RetainPtr<CFGAS_GEFont> pFont =
CFGAS_GEFont::LoadFont(pFD->wsFontFace, dwFontStyles, wCodePage);
if (!pFont)
return nullptr;
pFont->SetLogicalFontStyle(dwFontStyles);
pFontArray->push_back(pFont);
return pFont;
#else // BUILDFLAG(IS_WIN)
return GetFontByCodePage(wCodePage, dwFontStyles, pszFontFamily);
#endif // BUILDFLAG(IS_WIN)
}