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// Copyright 2014 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 "public/fpdf_sysfontinfo.h"
#include <stddef.h>
#include <memory>
#include "core/fxcrt/fx_codepage.h"
#include "core/fxcrt/numerics/safe_conversions.h"
#include "core/fxcrt/stl_util.h"
#include "core/fxcrt/unowned_ptr.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/systemfontinfo_iface.h"
#ifdef PDF_ENABLE_XFA
#include "xfa/fgas/font/cfgas_fontmgr.h"
#include "xfa/fgas/font/cfgas_gemodule.h"
#endif
static_assert(FXFONT_ANSI_CHARSET == static_cast<int>(FX_Charset::kANSI),
"Charset must match");
static_assert(FXFONT_DEFAULT_CHARSET == static_cast<int>(FX_Charset::kDefault),
"Charset must match");
static_assert(FXFONT_SYMBOL_CHARSET == static_cast<int>(FX_Charset::kSymbol),
"Charset must match");
static_assert(FXFONT_SHIFTJIS_CHARSET ==
static_cast<int>(FX_Charset::kShiftJIS),
"Charset must match");
static_assert(FXFONT_HANGEUL_CHARSET == static_cast<int>(FX_Charset::kHangul),
"Charset must match");
static_assert(FXFONT_GB2312_CHARSET ==
static_cast<int>(FX_Charset::kChineseSimplified),
"Charset must match");
static_assert(FXFONT_CHINESEBIG5_CHARSET ==
static_cast<int>(FX_Charset::kChineseTraditional),
"Charset must match");
static_assert(FXFONT_GREEK_CHARSET ==
static_cast<int>(FX_Charset::kMSWin_Greek),
"Charset must match");
static_assert(FXFONT_VIETNAMESE_CHARSET ==
static_cast<int>(FX_Charset::kMSWin_Vietnamese),
"Charset must match");
static_assert(FXFONT_HEBREW_CHARSET ==
static_cast<int>(FX_Charset::kMSWin_Hebrew),
"Charset must match");
static_assert(FXFONT_ARABIC_CHARSET ==
static_cast<int>(FX_Charset::kMSWin_Arabic),
"Charset must match");
static_assert(FXFONT_CYRILLIC_CHARSET ==
static_cast<int>(FX_Charset::kMSWin_Cyrillic),
"Charset must match");
static_assert(FXFONT_THAI_CHARSET == static_cast<int>(FX_Charset::kThai),
"Charset must match");
static_assert(FXFONT_EASTERNEUROPEAN_CHARSET ==
static_cast<int>(FX_Charset::kMSWin_EasternEuropean),
"Charset must match");
static_assert(offsetof(CFX_Font::CharsetFontMap, charset) ==
offsetof(FPDF_CharsetFontMap, charset),
"CFX_Font::CharsetFontMap must be same as FPDF_CharsetFontMap");
static_assert(offsetof(CFX_Font::CharsetFontMap, fontname) ==
offsetof(FPDF_CharsetFontMap, fontname),
"CFX_Font::CharsetFontMap must be same as FPDF_CharsetFontMap");
static_assert(sizeof(CFX_Font::CharsetFontMap) == sizeof(FPDF_CharsetFontMap),
"CFX_Font::CharsetFontMap must be same as FPDF_CharsetFontMap");
class CFX_ExternalFontInfo final : public SystemFontInfoIface {
public:
explicit CFX_ExternalFontInfo(FPDF_SYSFONTINFO* pInfo) : m_pInfo(pInfo) {}
~CFX_ExternalFontInfo() override {
if (m_pInfo->Release)
m_pInfo->Release(m_pInfo);
}
bool EnumFontList(CFX_FontMapper* pMapper) override {
if (m_pInfo->EnumFonts) {
m_pInfo->EnumFonts(m_pInfo, pMapper);
return true;
}
return false;
}
void* MapFont(int weight,
bool bItalic,
FX_Charset charset,
int pitch_family,
const ByteString& face) override {
if (!m_pInfo->MapFont)
return nullptr;
int iExact;
return m_pInfo->MapFont(m_pInfo, weight, bItalic, static_cast<int>(charset),
pitch_family, face.c_str(), &iExact);
}
void* GetFont(const ByteString& family) override {
if (!m_pInfo->GetFont)
return nullptr;
return m_pInfo->GetFont(m_pInfo, family.c_str());
}
size_t GetFontData(void* hFont,
uint32_t table,
pdfium::span<uint8_t> buffer) override {
if (!m_pInfo->GetFontData)
return 0;
return m_pInfo->GetFontData(m_pInfo, hFont, table, buffer.data(),
fxcrt::CollectionSize<unsigned long>(buffer));
}
bool GetFaceName(void* hFont, ByteString* name) override {
if (!m_pInfo->GetFaceName)
return false;
unsigned long size = m_pInfo->GetFaceName(m_pInfo, hFont, nullptr, 0);
if (size == 0)
return false;
char* buffer = FX_Alloc(char, size);
size = m_pInfo->GetFaceName(m_pInfo, hFont, buffer, size);
*name = ByteString(buffer, size);
FX_Free(buffer);
return true;
}
bool GetFontCharset(void* hFont, FX_Charset* charset) override {
if (!m_pInfo->GetFontCharset)
return false;
*charset = FX_GetCharsetFromInt(m_pInfo->GetFontCharset(m_pInfo, hFont));
return true;
}
void DeleteFont(void* hFont) override {
if (m_pInfo->DeleteFont)
m_pInfo->DeleteFont(m_pInfo, hFont);
}
private:
UnownedPtr<FPDF_SYSFONTINFO> const m_pInfo;
};
FPDF_EXPORT void FPDF_CALLCONV FPDF_AddInstalledFont(void* mapper,
const char* face,
int charset) {
CFX_FontMapper* pMapper = static_cast<CFX_FontMapper*>(mapper);
pMapper->AddInstalledFont(face, FX_GetCharsetFromInt(charset));
}
FPDF_EXPORT void FPDF_CALLCONV
FPDF_SetSystemFontInfo(FPDF_SYSFONTINFO* pFontInfoExt) {
auto* mapper = CFX_GEModule::Get()->GetFontMgr()->GetBuiltinMapper();
if (!pFontInfoExt) {
std::unique_ptr<SystemFontInfoIface> info = mapper->TakeSystemFontInfo();
// Delete `info` when it goes out of scope here.
return;
}
if (pFontInfoExt->version != 1)
return;
mapper->SetSystemFontInfo(
std::make_unique<CFX_ExternalFontInfo>(pFontInfoExt));
#ifdef PDF_ENABLE_XFA
CFGAS_GEModule::Get()->GetFontMgr()->EnumFonts();
#endif
}
FPDF_EXPORT const FPDF_CharsetFontMap* FPDF_CALLCONV FPDF_GetDefaultTTFMap() {
return reinterpret_cast<const FPDF_CharsetFontMap*>(CFX_Font::kDefaultTTFMap);
}
struct FPDF_SYSFONTINFO_DEFAULT final : public FPDF_SYSFONTINFO {
UnownedPtr<SystemFontInfoIface> m_pFontInfo;
};
static void DefaultRelease(struct _FPDF_SYSFONTINFO* pThis) {
auto* pDefault = static_cast<FPDF_SYSFONTINFO_DEFAULT*>(pThis);
pDefault->m_pFontInfo.ClearAndDelete();
}
static void DefaultEnumFonts(struct _FPDF_SYSFONTINFO* pThis, void* pMapper) {
auto* pDefault = static_cast<FPDF_SYSFONTINFO_DEFAULT*>(pThis);
pDefault->m_pFontInfo->EnumFontList(static_cast<CFX_FontMapper*>(pMapper));
}
static void* DefaultMapFont(struct _FPDF_SYSFONTINFO* pThis,
int weight,
FPDF_BOOL use_italic,
int charset,
int pitch_family,
const char* family,
FPDF_BOOL* /*exact*/) {
auto* pDefault = static_cast<FPDF_SYSFONTINFO_DEFAULT*>(pThis);
return pDefault->m_pFontInfo->MapFont(weight, !!use_italic,
FX_GetCharsetFromInt(charset),
pitch_family, family);
}
void* DefaultGetFont(struct _FPDF_SYSFONTINFO* pThis, const char* family) {
auto* pDefault = static_cast<FPDF_SYSFONTINFO_DEFAULT*>(pThis);
return pDefault->m_pFontInfo->GetFont(family);
}
static unsigned long DefaultGetFontData(struct _FPDF_SYSFONTINFO* pThis,
void* hFont,
unsigned int table,
unsigned char* buffer,
unsigned long buf_size) {
auto* pDefault = static_cast<FPDF_SYSFONTINFO_DEFAULT*>(pThis);
return pdfium::checked_cast<unsigned long>(
pDefault->m_pFontInfo->GetFontData(hFont, table, {buffer, buf_size}));
}
static unsigned long DefaultGetFaceName(struct _FPDF_SYSFONTINFO* pThis,
void* hFont,
char* buffer,
unsigned long buf_size) {
ByteString name;
auto* pDefault = static_cast<FPDF_SYSFONTINFO_DEFAULT*>(pThis);
if (!pDefault->m_pFontInfo->GetFaceName(hFont, &name))
return 0;
const unsigned long copy_length =
pdfium::checked_cast<unsigned long>(name.GetLength() + 1);
if (copy_length <= buf_size)
strncpy(buffer, name.c_str(), copy_length * sizeof(ByteString::CharType));
return copy_length;
}
static int DefaultGetFontCharset(struct _FPDF_SYSFONTINFO* pThis, void* hFont) {
FX_Charset charset;
auto* pDefault = static_cast<FPDF_SYSFONTINFO_DEFAULT*>(pThis);
if (!pDefault->m_pFontInfo->GetFontCharset(hFont, &charset))
return 0;
return static_cast<int>(charset);
}
static void DefaultDeleteFont(struct _FPDF_SYSFONTINFO* pThis, void* hFont) {
auto* pDefault = static_cast<FPDF_SYSFONTINFO_DEFAULT*>(pThis);
pDefault->m_pFontInfo->DeleteFont(hFont);
}
FPDF_EXPORT FPDF_SYSFONTINFO* FPDF_CALLCONV FPDF_GetDefaultSystemFontInfo() {
std::unique_ptr<SystemFontInfoIface> pFontInfo =
CFX_GEModule::Get()->GetPlatform()->CreateDefaultSystemFontInfo();
if (!pFontInfo)
return nullptr;
FPDF_SYSFONTINFO_DEFAULT* pFontInfoExt =
FX_Alloc(FPDF_SYSFONTINFO_DEFAULT, 1);
pFontInfoExt->DeleteFont = DefaultDeleteFont;
pFontInfoExt->EnumFonts = DefaultEnumFonts;
pFontInfoExt->GetFaceName = DefaultGetFaceName;
pFontInfoExt->GetFont = DefaultGetFont;
pFontInfoExt->GetFontCharset = DefaultGetFontCharset;
pFontInfoExt->GetFontData = DefaultGetFontData;
pFontInfoExt->MapFont = DefaultMapFont;
pFontInfoExt->Release = DefaultRelease;
pFontInfoExt->version = 1;
pFontInfoExt->m_pFontInfo = pFontInfo.release();
return pFontInfoExt;
}
FPDF_EXPORT void FPDF_CALLCONV
FPDF_FreeDefaultSystemFontInfo(FPDF_SYSFONTINFO* pFontInfo) {
FX_Free(static_cast<FPDF_SYSFONTINFO_DEFAULT*>(pFontInfo));
}