1 // Copyright 2014 PDFium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com 6 7 #include "public/fpdf_sysfontinfo.h" 8 9 #include <memory> 10 11 #include "core/fxcrt/fx_codepage.h" 12 #include "core/fxge/cfx_fontmapper.h" 13 #include "core/fxge/cfx_fontmgr.h" 14 #include "core/fxge/cfx_gemodule.h" 15 #include "core/fxge/fx_font.h" 16 #include "core/fxge/ifx_systemfontinfo.h" 17 #include "fpdfsdk/fsdk_define.h" 18 #include "fpdfsdk/pwl/cpwl_font_map.h" 19 #include "third_party/base/ptr_util.h" 20 21 static_assert(FXFONT_ANSI_CHARSET == FX_CHARSET_ANSI, "Charset must match"); 22 static_assert(FXFONT_DEFAULT_CHARSET == FX_CHARSET_Default, 23 "Charset must match"); 24 static_assert(FXFONT_SYMBOL_CHARSET == FX_CHARSET_Symbol, "Charset must match"); 25 static_assert(FXFONT_SHIFTJIS_CHARSET == FX_CHARSET_ShiftJIS, 26 "Charset must match"); 27 static_assert(FXFONT_HANGEUL_CHARSET == FX_CHARSET_Hangul, 28 "Charset must match"); 29 static_assert(FXFONT_GB2312_CHARSET == FX_CHARSET_ChineseSimplified, 30 "Charset must match"); 31 static_assert(FXFONT_CHINESEBIG5_CHARSET == FX_CHARSET_ChineseTraditional, 32 "Charset must match"); 33 34 class CFX_ExternalFontInfo final : public IFX_SystemFontInfo { 35 public: 36 explicit CFX_ExternalFontInfo(FPDF_SYSFONTINFO* pInfo) : m_pInfo(pInfo) {} 37 ~CFX_ExternalFontInfo() override { 38 if (m_pInfo->Release) 39 m_pInfo->Release(m_pInfo); 40 } 41 42 bool EnumFontList(CFX_FontMapper* pMapper) override { 43 if (m_pInfo->EnumFonts) { 44 m_pInfo->EnumFonts(m_pInfo, pMapper); 45 return true; 46 } 47 return false; 48 } 49 50 void* MapFont(int weight, 51 bool bItalic, 52 int charset, 53 int pitch_family, 54 const char* family) override { 55 if (!m_pInfo->MapFont) 56 return nullptr; 57 58 int iExact; 59 return m_pInfo->MapFont(m_pInfo, weight, bItalic, charset, pitch_family, 60 family, &iExact); 61 } 62 63 void* GetFont(const char* family) override { 64 if (!m_pInfo->GetFont) 65 return nullptr; 66 return m_pInfo->GetFont(m_pInfo, family); 67 } 68 69 uint32_t GetFontData(void* hFont, 70 uint32_t table, 71 uint8_t* buffer, 72 uint32_t size) override { 73 if (!m_pInfo->GetFontData) 74 return 0; 75 return m_pInfo->GetFontData(m_pInfo, hFont, table, buffer, size); 76 } 77 78 bool GetFaceName(void* hFont, ByteString* name) override { 79 if (!m_pInfo->GetFaceName) 80 return false; 81 uint32_t size = m_pInfo->GetFaceName(m_pInfo, hFont, nullptr, 0); 82 if (size == 0) 83 return false; 84 char* buffer = FX_Alloc(char, size); 85 size = m_pInfo->GetFaceName(m_pInfo, hFont, buffer, size); 86 *name = ByteString(buffer, size); 87 FX_Free(buffer); 88 return true; 89 } 90 91 bool GetFontCharset(void* hFont, int* charset) override { 92 if (!m_pInfo->GetFontCharset) 93 return false; 94 95 *charset = m_pInfo->GetFontCharset(m_pInfo, hFont); 96 return true; 97 } 98 99 void DeleteFont(void* hFont) override { 100 if (m_pInfo->DeleteFont) 101 m_pInfo->DeleteFont(m_pInfo, hFont); 102 } 103 104 private: 105 FPDF_SYSFONTINFO* const m_pInfo; 106 }; 107 108 FPDF_EXPORT void FPDF_CALLCONV FPDF_AddInstalledFont(void* mapper, 109 const char* name, 110 int charset) { 111 CFX_FontMapper* pMapper = static_cast<CFX_FontMapper*>(mapper); 112 pMapper->AddInstalledFont(name, charset); 113 } 114 115 FPDF_EXPORT void FPDF_CALLCONV 116 FPDF_SetSystemFontInfo(FPDF_SYSFONTINFO* pFontInfoExt) { 117 if (pFontInfoExt->version != 1) 118 return; 119 120 CFX_GEModule::Get()->GetFontMgr()->SetSystemFontInfo( 121 pdfium::MakeUnique<CFX_ExternalFontInfo>(pFontInfoExt)); 122 } 123 124 FPDF_EXPORT const FPDF_CharsetFontMap* FPDF_CALLCONV FPDF_GetDefaultTTFMap() { 125 return CPWL_FontMap::defaultTTFMap; 126 } 127 128 struct FPDF_SYSFONTINFO_DEFAULT : public FPDF_SYSFONTINFO { 129 UnownedPtr<IFX_SystemFontInfo> m_pFontInfo; 130 }; 131 132 static void DefaultRelease(struct _FPDF_SYSFONTINFO* pThis) { 133 auto* pDefault = static_cast<FPDF_SYSFONTINFO_DEFAULT*>(pThis); 134 delete pDefault->m_pFontInfo.Release(); 135 } 136 137 static void DefaultEnumFonts(struct _FPDF_SYSFONTINFO* pThis, void* pMapper) { 138 auto* pDefault = static_cast<FPDF_SYSFONTINFO_DEFAULT*>(pThis); 139 pDefault->m_pFontInfo->EnumFontList((CFX_FontMapper*)pMapper); 140 } 141 142 static void* DefaultMapFont(struct _FPDF_SYSFONTINFO* pThis, 143 int weight, 144 int bItalic, 145 int charset, 146 int pitch_family, 147 const char* family, 148 int* bExact) { 149 auto* pDefault = static_cast<FPDF_SYSFONTINFO_DEFAULT*>(pThis); 150 return pDefault->m_pFontInfo->MapFont(weight, !!bItalic, charset, 151 pitch_family, family); 152 } 153 154 void* DefaultGetFont(struct _FPDF_SYSFONTINFO* pThis, const char* family) { 155 auto* pDefault = static_cast<FPDF_SYSFONTINFO_DEFAULT*>(pThis); 156 return pDefault->m_pFontInfo->GetFont(family); 157 } 158 159 static unsigned long DefaultGetFontData(struct _FPDF_SYSFONTINFO* pThis, 160 void* hFont, 161 unsigned int table, 162 unsigned char* buffer, 163 unsigned long buf_size) { 164 auto* pDefault = static_cast<FPDF_SYSFONTINFO_DEFAULT*>(pThis); 165 return pDefault->m_pFontInfo->GetFontData(hFont, table, buffer, buf_size); 166 } 167 168 static unsigned long DefaultGetFaceName(struct _FPDF_SYSFONTINFO* pThis, 169 void* hFont, 170 char* buffer, 171 unsigned long buf_size) { 172 ByteString name; 173 auto* pDefault = static_cast<FPDF_SYSFONTINFO_DEFAULT*>(pThis); 174 if (!pDefault->m_pFontInfo->GetFaceName(hFont, &name)) 175 return 0; 176 if (name.GetLength() >= static_cast<size_t>(buf_size)) 177 return name.GetLength() + 1; 178 179 strncpy(buffer, name.c_str(), 180 (name.GetLength() + 1) * sizeof(ByteString::CharType)); 181 return name.GetLength() + 1; 182 } 183 184 static int DefaultGetFontCharset(struct _FPDF_SYSFONTINFO* pThis, void* hFont) { 185 int charset; 186 auto* pDefault = static_cast<FPDF_SYSFONTINFO_DEFAULT*>(pThis); 187 if (!pDefault->m_pFontInfo->GetFontCharset(hFont, &charset)) 188 return 0; 189 return charset; 190 } 191 192 static void DefaultDeleteFont(struct _FPDF_SYSFONTINFO* pThis, void* hFont) { 193 auto* pDefault = static_cast<FPDF_SYSFONTINFO_DEFAULT*>(pThis); 194 pDefault->m_pFontInfo->DeleteFont(hFont); 195 } 196 197 FPDF_EXPORT FPDF_SYSFONTINFO* FPDF_CALLCONV FPDF_GetDefaultSystemFontInfo() { 198 std::unique_ptr<IFX_SystemFontInfo> pFontInfo = 199 IFX_SystemFontInfo::CreateDefault(nullptr); 200 if (!pFontInfo) 201 return nullptr; 202 203 FPDF_SYSFONTINFO_DEFAULT* pFontInfoExt = 204 FX_Alloc(FPDF_SYSFONTINFO_DEFAULT, 1); 205 pFontInfoExt->DeleteFont = DefaultDeleteFont; 206 pFontInfoExt->EnumFonts = DefaultEnumFonts; 207 pFontInfoExt->GetFaceName = DefaultGetFaceName; 208 pFontInfoExt->GetFont = DefaultGetFont; 209 pFontInfoExt->GetFontCharset = DefaultGetFontCharset; 210 pFontInfoExt->GetFontData = DefaultGetFontData; 211 pFontInfoExt->MapFont = DefaultMapFont; 212 pFontInfoExt->Release = DefaultRelease; 213 pFontInfoExt->version = 1; 214 pFontInfoExt->m_pFontInfo = pFontInfo.release(); 215 return pFontInfoExt; 216 } 217 218 FPDF_EXPORT void FPDF_CALLCONV 219 FPDF_FreeDefaultSystemFontInfo(FPDF_SYSFONTINFO* pDefaultFontInfo) { 220 FX_Free(static_cast<FPDF_SYSFONTINFO_DEFAULT*>(pDefaultFontInfo)); 221 } 222
