1 // Copyright 2017 The PDFium Authors
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/fpdfapi/font/cpdf_fontglobals.h"
8
9 #include <utility>
10
11 #include "core/fpdfapi/cmaps/CNS1/cmaps_cns1.h"
12 #include "core/fpdfapi/cmaps/GB1/cmaps_gb1.h"
13 #include "core/fpdfapi/cmaps/Japan1/cmaps_japan1.h"
14 #include "core/fpdfapi/cmaps/Korea1/cmaps_korea1.h"
15 #include "core/fpdfapi/font/cfx_stockfontarray.h"
16 #include "core/fpdfapi/font/cpdf_cid2unicodemap.h"
17 #include "core/fpdfapi/font/cpdf_cmap.h"
18 #include "core/fpdfapi/parser/cpdf_document.h"
19 #include "core/fxcrt/check.h"
20 #include "core/fxcrt/containers/contains.h"
21
22 namespace {
23
24 CPDF_FontGlobals* g_FontGlobals = nullptr;
25
LoadPredefinedCMap(ByteStringView name)26 RetainPtr<const CPDF_CMap> LoadPredefinedCMap(ByteStringView name) {
27 if (!name.IsEmpty() && name[0] == '/')
28 name = name.Last(name.GetLength() - 1);
29 return pdfium::MakeRetain<CPDF_CMap>(name);
30 }
31
32 } // namespace
33
34 // static
Create()35 void CPDF_FontGlobals::Create() {
36 DCHECK(!g_FontGlobals);
37 g_FontGlobals = new CPDF_FontGlobals();
38 }
39
40 // static
Destroy()41 void CPDF_FontGlobals::Destroy() {
42 DCHECK(g_FontGlobals);
43 delete g_FontGlobals;
44 g_FontGlobals = nullptr;
45 }
46
47 // static
GetInstance()48 CPDF_FontGlobals* CPDF_FontGlobals::GetInstance() {
49 DCHECK(g_FontGlobals);
50 return g_FontGlobals;
51 }
52
53 CPDF_FontGlobals::CPDF_FontGlobals() = default;
54
55 CPDF_FontGlobals::~CPDF_FontGlobals() = default;
56
LoadEmbeddedMaps()57 void CPDF_FontGlobals::LoadEmbeddedMaps() {
58 LoadEmbeddedGB1CMaps();
59 LoadEmbeddedCNS1CMaps();
60 LoadEmbeddedJapan1CMaps();
61 LoadEmbeddedKorea1CMaps();
62 }
63
Find(CPDF_Document * pDoc,CFX_FontMapper::StandardFont index)64 RetainPtr<CPDF_Font> CPDF_FontGlobals::Find(
65 CPDF_Document* pDoc,
66 CFX_FontMapper::StandardFont index) {
67 auto it = m_StockMap.find(pDoc);
68 if (it == m_StockMap.end() || !it->second)
69 return nullptr;
70
71 return it->second->GetFont(index);
72 }
73
Set(CPDF_Document * pDoc,CFX_FontMapper::StandardFont index,RetainPtr<CPDF_Font> pFont)74 void CPDF_FontGlobals::Set(CPDF_Document* pDoc,
75 CFX_FontMapper::StandardFont index,
76 RetainPtr<CPDF_Font> pFont) {
77 UnownedPtr<CPDF_Document> pKey(pDoc);
78 if (!pdfium::Contains(m_StockMap, pKey))
79 m_StockMap[pKey] = std::make_unique<CFX_StockFontArray>();
80 m_StockMap[pKey]->SetFont(index, std::move(pFont));
81 }
82
Clear(CPDF_Document * pDoc)83 void CPDF_FontGlobals::Clear(CPDF_Document* pDoc) {
84 // Avoid constructing smart-pointer key as erase() doesn't invoke
85 // transparent lookup in the same way find() does.
86 auto it = m_StockMap.find(pDoc);
87 if (it != m_StockMap.end())
88 m_StockMap.erase(it);
89 }
90
LoadEmbeddedGB1CMaps()91 void CPDF_FontGlobals::LoadEmbeddedGB1CMaps() {
92 SetEmbeddedCharset(CIDSET_GB1, fxcmap::kGB1_cmaps_span);
93 SetEmbeddedToUnicode(CIDSET_GB1, fxcmap::kGB1CID2Unicode_5);
94 }
95
LoadEmbeddedCNS1CMaps()96 void CPDF_FontGlobals::LoadEmbeddedCNS1CMaps() {
97 SetEmbeddedCharset(CIDSET_CNS1, fxcmap::kCNS1_cmaps_span);
98 SetEmbeddedToUnicode(CIDSET_CNS1, fxcmap::kCNS1CID2Unicode_5);
99 }
100
LoadEmbeddedJapan1CMaps()101 void CPDF_FontGlobals::LoadEmbeddedJapan1CMaps() {
102 SetEmbeddedCharset(CIDSET_JAPAN1, fxcmap::kJapan1_cmaps_span);
103 SetEmbeddedToUnicode(CIDSET_JAPAN1, fxcmap::kJapan1CID2Unicode_4);
104 }
105
LoadEmbeddedKorea1CMaps()106 void CPDF_FontGlobals::LoadEmbeddedKorea1CMaps() {
107 SetEmbeddedCharset(CIDSET_KOREA1, fxcmap::kKorea1_cmaps_span);
108 SetEmbeddedToUnicode(CIDSET_KOREA1, fxcmap::kKorea1CID2Unicode_2);
109 }
110
GetPredefinedCMap(const ByteString & name)111 RetainPtr<const CPDF_CMap> CPDF_FontGlobals::GetPredefinedCMap(
112 const ByteString& name) {
113 auto it = m_CMaps.find(name);
114 if (it != m_CMaps.end())
115 return it->second;
116
117 RetainPtr<const CPDF_CMap> pCMap = LoadPredefinedCMap(name.AsStringView());
118 if (!name.IsEmpty())
119 m_CMaps[name] = pCMap;
120
121 return pCMap;
122 }
123
GetCID2UnicodeMap(CIDSet charset)124 CPDF_CID2UnicodeMap* CPDF_FontGlobals::GetCID2UnicodeMap(CIDSet charset) {
125 if (!m_CID2UnicodeMaps[charset]) {
126 m_CID2UnicodeMaps[charset] = std::make_unique<CPDF_CID2UnicodeMap>(charset);
127 }
128 return m_CID2UnicodeMaps[charset].get();
129 }
130