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_unicodeencodingex.h"
8
9 #include "core/fpdfapi/font/cpdf_font.h"
10 #include "core/fxge/fx_font.h"
11 #include "core/fxge/fx_freetype.h"
12
13 namespace {
14
15 const uint32_t g_EncodingID[] = {
16 FXFM_ENCODING_MS_SYMBOL, FXFM_ENCODING_UNICODE,
17 FXFM_ENCODING_MS_SJIS, FXFM_ENCODING_MS_GB2312,
18 FXFM_ENCODING_MS_BIG5, FXFM_ENCODING_MS_WANSUNG,
19 FXFM_ENCODING_MS_JOHAB, FXFM_ENCODING_ADOBE_STANDARD,
20 FXFM_ENCODING_ADOBE_EXPERT, FXFM_ENCODING_ADOBE_CUSTOM,
21 FXFM_ENCODING_ADOBE_LATIN_1, FXFM_ENCODING_OLD_LATIN_2,
22 FXFM_ENCODING_APPLE_ROMAN,
23 };
24
FXFM_CreateFontEncoding(CFX_Font * pFont,uint32_t nEncodingID)25 CFX_UnicodeEncodingEx* FXFM_CreateFontEncoding(CFX_Font* pFont,
26 uint32_t nEncodingID) {
27 if (FXFT_Select_Charmap(pFont->GetFace(), nEncodingID))
28 return nullptr;
29 return new CFX_UnicodeEncodingEx(pFont, nEncodingID);
30 }
31
32 } // namespace
33
CFX_UnicodeEncodingEx(CFX_Font * pFont,uint32_t EncodingID)34 CFX_UnicodeEncodingEx::CFX_UnicodeEncodingEx(CFX_Font* pFont,
35 uint32_t EncodingID)
36 : CFX_UnicodeEncoding(pFont), m_nEncodingID(EncodingID) {}
37
~CFX_UnicodeEncodingEx()38 CFX_UnicodeEncodingEx::~CFX_UnicodeEncodingEx() {}
39
GlyphFromCharCode(uint32_t charcode)40 uint32_t CFX_UnicodeEncodingEx::GlyphFromCharCode(uint32_t charcode) {
41 FXFT_Face face = m_pFont->GetFace();
42 FT_UInt nIndex = FXFT_Get_Char_Index(face, charcode);
43 if (nIndex > 0)
44 return nIndex;
45 int nmaps = FXFT_Get_Face_CharmapCount(face);
46 int m = 0;
47 while (m < nmaps) {
48 uint32_t nEncodingID =
49 FXFT_Get_Charmap_Encoding(FXFT_Get_Face_Charmaps(face)[m++]);
50 if (m_nEncodingID == nEncodingID)
51 continue;
52 int error = FXFT_Select_Charmap(face, nEncodingID);
53 if (error)
54 continue;
55 nIndex = FXFT_Get_Char_Index(face, charcode);
56 if (nIndex > 0) {
57 m_nEncodingID = nEncodingID;
58 return nIndex;
59 }
60 }
61 FXFT_Select_Charmap(face, m_nEncodingID);
62 return 0;
63 }
64
CharCodeFromUnicode(FX_WCHAR Unicode) const65 uint32_t CFX_UnicodeEncodingEx::CharCodeFromUnicode(FX_WCHAR Unicode) const {
66 if (m_nEncodingID == FXFM_ENCODING_UNICODE ||
67 m_nEncodingID == FXFM_ENCODING_MS_SYMBOL) {
68 return Unicode;
69 }
70 FXFT_Face face = m_pFont->GetFace();
71 int nmaps = FXFT_Get_Face_CharmapCount(face);
72 for (int i = 0; i < nmaps; i++) {
73 int nEncodingID =
74 FXFT_Get_Charmap_Encoding(FXFT_Get_Face_Charmaps(face)[i]);
75 if (nEncodingID == FXFM_ENCODING_UNICODE ||
76 nEncodingID == FXFM_ENCODING_MS_SYMBOL) {
77 return Unicode;
78 }
79 }
80 return CPDF_Font::kInvalidCharCode;
81 }
82
FX_CreateFontEncodingEx(CFX_Font * pFont,uint32_t nEncodingID)83 CFX_UnicodeEncodingEx* FX_CreateFontEncodingEx(CFX_Font* pFont,
84 uint32_t nEncodingID) {
85 if (!pFont || !pFont->GetFace())
86 return nullptr;
87
88 if (nEncodingID != FXFM_ENCODING_NONE)
89 return FXFM_CreateFontEncoding(pFont, nEncodingID);
90
91 for (size_t i = 0; i < FX_ArraySize(g_EncodingID); ++i) {
92 CFX_UnicodeEncodingEx* pFontEncoding =
93 FXFM_CreateFontEncoding(pFont, g_EncodingID[i]);
94 if (pFontEncoding)
95 return pFontEncoding;
96 }
97 return nullptr;
98 }
99