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 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 34 CFX_UnicodeEncodingEx::CFX_UnicodeEncodingEx(CFX_Font* pFont, 35 uint32_t EncodingID) 36 : CFX_UnicodeEncoding(pFont), m_nEncodingID(EncodingID) {} 37 38 CFX_UnicodeEncodingEx::~CFX_UnicodeEncodingEx() {} 39 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 65 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 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
