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
21static_assert(FXFONT_ANSI_CHARSET == FX_CHARSET_ANSI, "Charset must match");
22static_assert(FXFONT_DEFAULT_CHARSET == FX_CHARSET_Default,
23              "Charset must match");
24static_assert(FXFONT_SYMBOL_CHARSET == FX_CHARSET_Symbol, "Charset must match");
25static_assert(FXFONT_SHIFTJIS_CHARSET == FX_CHARSET_ShiftJIS,
26              "Charset must match");
27static_assert(FXFONT_HANGEUL_CHARSET == FX_CHARSET_Hangul,
28              "Charset must match");
29static_assert(FXFONT_GB2312_CHARSET == FX_CHARSET_ChineseSimplified,
30              "Charset must match");
31static_assert(FXFONT_CHINESEBIG5_CHARSET == FX_CHARSET_ChineseTraditional,
32              "Charset must match");
33
34class 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
108FPDF_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
115FPDF_EXPORT void FPDF_CALLCONV
116FPDF_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
124FPDF_EXPORT const FPDF_CharsetFontMap* FPDF_CALLCONV FPDF_GetDefaultTTFMap() {
125  return CPWL_FontMap::defaultTTFMap;
126}
127
128struct FPDF_SYSFONTINFO_DEFAULT : public FPDF_SYSFONTINFO {
129  UnownedPtr<IFX_SystemFontInfo> m_pFontInfo;
130};
131
132static void DefaultRelease(struct _FPDF_SYSFONTINFO* pThis) {
133  auto* pDefault = static_cast<FPDF_SYSFONTINFO_DEFAULT*>(pThis);
134  delete pDefault->m_pFontInfo.Release();
135}
136
137static 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
142static 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
154void* 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
159static 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
168static 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
184static 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
192static 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
197FPDF_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
218FPDF_EXPORT void FPDF_CALLCONV
219FPDF_FreeDefaultSystemFontInfo(FPDF_SYSFONTINFO* pDefaultFontInfo) {
220  FX_Free(static_cast<FPDF_SYSFONTINFO_DEFAULT*>(pDefaultFontInfo));
221}
222