// Copyright 2016 PDFium Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com #include "core/fxge/cfx_unicodeencodingex.h" #include <memory> #include "core/fpdfapi/font/cpdf_font.h" #include "core/fxge/fx_font.h" #include "core/fxge/fx_freetype.h" #include "third_party/base/ptr_util.h" namespace { const uint32_t g_EncodingID[] = { FXFM_ENCODING_MS_SYMBOL, FXFM_ENCODING_UNICODE, FXFM_ENCODING_MS_SJIS, FXFM_ENCODING_MS_GB2312, FXFM_ENCODING_MS_BIG5, FXFM_ENCODING_MS_WANSUNG, FXFM_ENCODING_MS_JOHAB, FXFM_ENCODING_ADOBE_STANDARD, FXFM_ENCODING_ADOBE_EXPERT, FXFM_ENCODING_ADOBE_CUSTOM, FXFM_ENCODING_ADOBE_LATIN_1, FXFM_ENCODING_OLD_LATIN_2, FXFM_ENCODING_APPLE_ROMAN, }; std::unique_ptr<CFX_UnicodeEncodingEx> FXFM_CreateFontEncoding( CFX_Font* pFont, uint32_t nEncodingID) { if (FXFT_Select_Charmap(pFont->GetFace(), nEncodingID)) return nullptr; return pdfium::MakeUnique<CFX_UnicodeEncodingEx>(pFont, nEncodingID); } } // namespace CFX_UnicodeEncodingEx::CFX_UnicodeEncodingEx(CFX_Font* pFont, uint32_t EncodingID) : CFX_UnicodeEncoding(pFont), m_nEncodingID(EncodingID) {} CFX_UnicodeEncodingEx::~CFX_UnicodeEncodingEx() {} uint32_t CFX_UnicodeEncodingEx::GlyphFromCharCode(uint32_t charcode) { FXFT_Face face = m_pFont->GetFace(); FT_UInt nIndex = FXFT_Get_Char_Index(face, charcode); if (nIndex > 0) return nIndex; int nmaps = FXFT_Get_Face_CharmapCount(face); int m = 0; while (m < nmaps) { uint32_t nEncodingID = FXFT_Get_Charmap_Encoding(FXFT_Get_Face_Charmaps(face)[m++]); if (m_nEncodingID == nEncodingID) continue; int error = FXFT_Select_Charmap(face, nEncodingID); if (error) continue; nIndex = FXFT_Get_Char_Index(face, charcode); if (nIndex > 0) { m_nEncodingID = nEncodingID; return nIndex; } } FXFT_Select_Charmap(face, m_nEncodingID); return 0; } uint32_t CFX_UnicodeEncodingEx::CharCodeFromUnicode(wchar_t Unicode) const { if (m_nEncodingID == FXFM_ENCODING_UNICODE || m_nEncodingID == FXFM_ENCODING_MS_SYMBOL) { return Unicode; } FXFT_Face face = m_pFont->GetFace(); int nmaps = FXFT_Get_Face_CharmapCount(face); for (int i = 0; i < nmaps; i++) { int nEncodingID = FXFT_Get_Charmap_Encoding(FXFT_Get_Face_Charmaps(face)[i]); if (nEncodingID == FXFM_ENCODING_UNICODE || nEncodingID == FXFM_ENCODING_MS_SYMBOL) { return Unicode; } } return CPDF_Font::kInvalidCharCode; } std::unique_ptr<CFX_UnicodeEncodingEx> FX_CreateFontEncodingEx( CFX_Font* pFont, uint32_t nEncodingID) { if (!pFont || !pFont->GetFace()) return nullptr; if (nEncodingID != FXFM_ENCODING_NONE) return FXFM_CreateFontEncoding(pFont, nEncodingID); for (size_t i = 0; i < FX_ArraySize(g_EncodingID); ++i) { std::unique_ptr<CFX_UnicodeEncodingEx> pFontEncoding = FXFM_CreateFontEncoding(pFont, g_EncodingID[i]); if (pFontEncoding) return pFontEncoding; } return nullptr; }