1 // Copyright 2016 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 "core/fxge/cfx_fontmgr.h"
8
9 #include <memory>
10 #include <utility>
11
12 #include "core/fxge/cfx_fontmapper.h"
13 #include "core/fxge/cfx_substfont.h"
14 #include "core/fxge/fontdata/chromefontdata/chromefontdata.h"
15 #include "core/fxge/fx_font.h"
16 #include "core/fxge/ge/cttfontdesc.h"
17 #include "core/fxge/ifx_systemfontinfo.h"
18 #include "third_party/base/ptr_util.h"
19
20 namespace {
21
22 struct BuiltinFont {
23 const uint8_t* m_pFontData;
24 uint32_t m_dwSize;
25 };
26
27 const BuiltinFont g_FoxitFonts[14] = {
28 {g_FoxitFixedFontData, 17597},
29 {g_FoxitFixedBoldFontData, 18055},
30 {g_FoxitFixedBoldItalicFontData, 19151},
31 {g_FoxitFixedItalicFontData, 18746},
32 {g_FoxitSansFontData, 15025},
33 {g_FoxitSansBoldFontData, 16344},
34 {g_FoxitSansBoldItalicFontData, 16418},
35 {g_FoxitSansItalicFontData, 16339},
36 {g_FoxitSerifFontData, 19469},
37 {g_FoxitSerifBoldFontData, 19395},
38 {g_FoxitSerifBoldItalicFontData, 20733},
39 {g_FoxitSerifItalicFontData, 21227},
40 {g_FoxitSymbolFontData, 16729},
41 {g_FoxitDingbatsFontData, 29513},
42 };
43
44 const BuiltinFont g_MMFonts[2] = {
45 {g_FoxitSerifMMFontData, 113417},
46 {g_FoxitSansMMFontData, 66919},
47 };
48
KeyNameFromFace(const CFX_ByteString & face_name,int weight,bool bItalic)49 CFX_ByteString KeyNameFromFace(const CFX_ByteString& face_name,
50 int weight,
51 bool bItalic) {
52 CFX_ByteString key(face_name);
53 key += ',';
54 key += CFX_ByteString::FormatInteger(weight);
55 key += bItalic ? 'I' : 'N';
56 return key;
57 }
58
KeyNameFromSize(int ttc_size,uint32_t checksum)59 CFX_ByteString KeyNameFromSize(int ttc_size, uint32_t checksum) {
60 CFX_ByteString key;
61 key.Format("%d:%d", ttc_size, checksum);
62 return key;
63 }
64
GetTTCIndex(const uint8_t * pFontData,uint32_t ttc_size,uint32_t font_offset)65 int GetTTCIndex(const uint8_t* pFontData,
66 uint32_t ttc_size,
67 uint32_t font_offset) {
68 int face_index = 0;
69 const uint8_t* p = pFontData + 8;
70 uint32_t nfont = GET_TT_LONG(p);
71 uint32_t index;
72 for (index = 0; index < nfont; index++) {
73 p = pFontData + 12 + index * 4;
74 if (GET_TT_LONG(p) == font_offset)
75 break;
76 }
77 if (index >= nfont)
78 face_index = 0;
79 else
80 face_index = index;
81 return face_index;
82 }
83
84 } // namespace
85
CFX_FontMgr()86 CFX_FontMgr::CFX_FontMgr()
87 : m_FTLibrary(nullptr), m_FTLibrarySupportsHinting(false) {
88 m_pBuiltinMapper = pdfium::MakeUnique<CFX_FontMapper>(this);
89 }
90
~CFX_FontMgr()91 CFX_FontMgr::~CFX_FontMgr() {
92 for (const auto& pair : m_FaceMap)
93 delete pair.second;
94
95 // |m_pBuiltinMapper| references |m_FTLibrary|, so it has to be destroyed
96 // first.
97 m_pBuiltinMapper.reset();
98 FXFT_Done_FreeType(m_FTLibrary);
99 }
100
InitFTLibrary()101 void CFX_FontMgr::InitFTLibrary() {
102 if (m_FTLibrary)
103 return;
104 FXFT_Init_FreeType(&m_FTLibrary);
105 m_FTLibrarySupportsHinting =
106 FXFT_Library_SetLcdFilter(m_FTLibrary, FT_LCD_FILTER_DEFAULT) !=
107 FT_Err_Unimplemented_Feature;
108 }
109
SetSystemFontInfo(std::unique_ptr<IFX_SystemFontInfo> pFontInfo)110 void CFX_FontMgr::SetSystemFontInfo(
111 std::unique_ptr<IFX_SystemFontInfo> pFontInfo) {
112 m_pBuiltinMapper->SetSystemFontInfo(std::move(pFontInfo));
113 }
114
FindSubstFont(const CFX_ByteString & face_name,bool bTrueType,uint32_t flags,int weight,int italic_angle,int CharsetCP,CFX_SubstFont * pSubstFont)115 FXFT_Face CFX_FontMgr::FindSubstFont(const CFX_ByteString& face_name,
116 bool bTrueType,
117 uint32_t flags,
118 int weight,
119 int italic_angle,
120 int CharsetCP,
121 CFX_SubstFont* pSubstFont) {
122 InitFTLibrary();
123 return m_pBuiltinMapper->FindSubstFont(face_name, bTrueType, flags, weight,
124 italic_angle, CharsetCP, pSubstFont);
125 }
126
GetCachedFace(const CFX_ByteString & face_name,int weight,bool bItalic,uint8_t * & pFontData)127 FXFT_Face CFX_FontMgr::GetCachedFace(const CFX_ByteString& face_name,
128 int weight,
129 bool bItalic,
130 uint8_t*& pFontData) {
131 auto it = m_FaceMap.find(KeyNameFromFace(face_name, weight, bItalic));
132 if (it == m_FaceMap.end())
133 return nullptr;
134
135 CTTFontDesc* pFontDesc = it->second;
136 pFontData = pFontDesc->m_pFontData;
137 pFontDesc->m_RefCount++;
138 return pFontDesc->m_SingleFace;
139 }
140
AddCachedFace(const CFX_ByteString & face_name,int weight,bool bItalic,uint8_t * pData,uint32_t size,int face_index)141 FXFT_Face CFX_FontMgr::AddCachedFace(const CFX_ByteString& face_name,
142 int weight,
143 bool bItalic,
144 uint8_t* pData,
145 uint32_t size,
146 int face_index) {
147 CTTFontDesc* pFontDesc = new CTTFontDesc;
148 pFontDesc->m_Type = 1;
149 pFontDesc->m_SingleFace = nullptr;
150 pFontDesc->m_pFontData = pData;
151 pFontDesc->m_RefCount = 1;
152
153 InitFTLibrary();
154 FXFT_Library library = m_FTLibrary;
155 int ret = FXFT_New_Memory_Face(library, pData, size, face_index,
156 &pFontDesc->m_SingleFace);
157 if (ret) {
158 delete pFontDesc;
159 return nullptr;
160 }
161 ret = FXFT_Set_Pixel_Sizes(pFontDesc->m_SingleFace, 64, 64);
162 if (ret) {
163 delete pFontDesc;
164 return nullptr;
165 }
166 m_FaceMap[KeyNameFromFace(face_name, weight, bItalic)] = pFontDesc;
167 return pFontDesc->m_SingleFace;
168 }
169
GetCachedTTCFace(int ttc_size,uint32_t checksum,int font_offset,uint8_t * & pFontData)170 FXFT_Face CFX_FontMgr::GetCachedTTCFace(int ttc_size,
171 uint32_t checksum,
172 int font_offset,
173 uint8_t*& pFontData) {
174 auto it = m_FaceMap.find(KeyNameFromSize(ttc_size, checksum));
175 if (it == m_FaceMap.end())
176 return nullptr;
177
178 CTTFontDesc* pFontDesc = it->second;
179 pFontData = pFontDesc->m_pFontData;
180 pFontDesc->m_RefCount++;
181 int face_index = GetTTCIndex(pFontDesc->m_pFontData, ttc_size, font_offset);
182 if (!pFontDesc->m_TTCFaces[face_index]) {
183 pFontDesc->m_TTCFaces[face_index] =
184 GetFixedFace(pFontDesc->m_pFontData, ttc_size, face_index);
185 }
186 return pFontDesc->m_TTCFaces[face_index];
187 }
188
AddCachedTTCFace(int ttc_size,uint32_t checksum,uint8_t * pData,uint32_t size,int font_offset)189 FXFT_Face CFX_FontMgr::AddCachedTTCFace(int ttc_size,
190 uint32_t checksum,
191 uint8_t* pData,
192 uint32_t size,
193 int font_offset) {
194 CTTFontDesc* pFontDesc = new CTTFontDesc;
195 pFontDesc->m_Type = 2;
196 pFontDesc->m_pFontData = pData;
197 for (int i = 0; i < 16; i++)
198 pFontDesc->m_TTCFaces[i] = nullptr;
199 pFontDesc->m_RefCount++;
200 m_FaceMap[KeyNameFromSize(ttc_size, checksum)] = pFontDesc;
201 int face_index = GetTTCIndex(pFontDesc->m_pFontData, ttc_size, font_offset);
202 pFontDesc->m_TTCFaces[face_index] =
203 GetFixedFace(pFontDesc->m_pFontData, ttc_size, face_index);
204 return pFontDesc->m_TTCFaces[face_index];
205 }
206
GetFixedFace(const uint8_t * pData,uint32_t size,int face_index)207 FXFT_Face CFX_FontMgr::GetFixedFace(const uint8_t* pData,
208 uint32_t size,
209 int face_index) {
210 InitFTLibrary();
211 FXFT_Library library = m_FTLibrary;
212 FXFT_Face face = nullptr;
213 if (FXFT_New_Memory_Face(library, pData, size, face_index, &face))
214 return nullptr;
215 return FXFT_Set_Pixel_Sizes(face, 64, 64) ? nullptr : face;
216 }
217
GetFileFace(const FX_CHAR * filename,int face_index)218 FXFT_Face CFX_FontMgr::GetFileFace(const FX_CHAR* filename, int face_index) {
219 InitFTLibrary();
220 FXFT_Library library = m_FTLibrary;
221 FXFT_Face face = nullptr;
222 if (FXFT_New_Face(library, filename, face_index, &face))
223 return nullptr;
224 return FXFT_Set_Pixel_Sizes(face, 64, 64) ? nullptr : face;
225 }
226
ReleaseFace(FXFT_Face face)227 void CFX_FontMgr::ReleaseFace(FXFT_Face face) {
228 if (!face)
229 return;
230 bool bNeedFaceDone = true;
231 auto it = m_FaceMap.begin();
232 while (it != m_FaceMap.end()) {
233 auto temp = it++;
234 int nRet = temp->second->ReleaseFace(face);
235 if (nRet == -1)
236 continue;
237 bNeedFaceDone = false;
238 if (nRet == 0)
239 m_FaceMap.erase(temp);
240 break;
241 }
242 if (bNeedFaceDone && !m_pBuiltinMapper->IsBuiltinFace(face))
243 FXFT_Done_Face(face);
244 }
245
GetBuiltinFont(size_t index,const uint8_t ** pFontData,uint32_t * size)246 bool CFX_FontMgr::GetBuiltinFont(size_t index,
247 const uint8_t** pFontData,
248 uint32_t* size) {
249 if (index < FX_ArraySize(g_FoxitFonts)) {
250 *pFontData = g_FoxitFonts[index].m_pFontData;
251 *size = g_FoxitFonts[index].m_dwSize;
252 return true;
253 }
254 index -= FX_ArraySize(g_FoxitFonts);
255 if (index < FX_ArraySize(g_MMFonts)) {
256 *pFontData = g_MMFonts[index].m_pFontData;
257 *size = g_MMFonts[index].m_dwSize;
258 return true;
259 }
260 return false;
261 }
262