| // Copyright 2016 The PDFium Authors |
| // 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/fxge/cfx_font.h" |
| #include "core/fxge/freetype/fx_freetype.h" |
| #include "core/fxge/fx_font.h" |
| #include "core/fxge/fx_fontencoding.h" |
| |
| namespace { |
| |
| constexpr fxge::FontEncoding kEncodingIDs[] = { |
| fxge::FontEncoding::kSymbol, fxge::FontEncoding::kUnicode, |
| fxge::FontEncoding::kSjis, fxge::FontEncoding::kGB2312, |
| fxge::FontEncoding::kBig5, fxge::FontEncoding::kWansung, |
| fxge::FontEncoding::kJohab, fxge::FontEncoding::kAdobeStandard, |
| fxge::FontEncoding::kAdobeExpert, fxge::FontEncoding::kAdobeCustom, |
| fxge::FontEncoding::kLatin1, fxge::FontEncoding::kOldLatin2, |
| fxge::FontEncoding::kAppleRoman, |
| }; |
| |
| std::unique_ptr<CFX_UnicodeEncodingEx> FXFM_CreateFontEncoding( |
| CFX_Font* pFont, |
| fxge::FontEncoding encoding_id) { |
| if (!pFont->GetFace()->SelectCharMap(encoding_id)) { |
| return nullptr; |
| } |
| return std::make_unique<CFX_UnicodeEncodingEx>(pFont, encoding_id); |
| } |
| |
| } // namespace |
| |
| CFX_UnicodeEncodingEx::CFX_UnicodeEncodingEx(CFX_Font* pFont, |
| fxge::FontEncoding encoding_id) |
| : CFX_UnicodeEncoding(pFont), encoding_id_(encoding_id) {} |
| |
| CFX_UnicodeEncodingEx::~CFX_UnicodeEncodingEx() = default; |
| |
| uint32_t CFX_UnicodeEncodingEx::GlyphFromCharCode(uint32_t charcode) { |
| RetainPtr<CFX_Face> face = m_pFont->GetFace(); |
| FT_UInt nIndex = face->GetCharIndex(charcode); |
| if (nIndex > 0) |
| return nIndex; |
| |
| size_t map_index = 0; |
| while (map_index < face->GetCharMapCount()) { |
| fxge::FontEncoding encoding_id = |
| face->GetCharMapEncodingByIndex(map_index++); |
| if (encoding_id_ == encoding_id) { |
| continue; |
| } |
| if (!face->SelectCharMap(encoding_id)) { |
| continue; |
| } |
| nIndex = face->GetCharIndex(charcode); |
| if (nIndex > 0) { |
| encoding_id_ = encoding_id; |
| return nIndex; |
| } |
| } |
| face->SelectCharMap(encoding_id_); |
| return 0; |
| } |
| |
| uint32_t CFX_UnicodeEncodingEx::CharCodeFromUnicode(wchar_t Unicode) const { |
| if (encoding_id_ == fxge::FontEncoding::kUnicode || |
| encoding_id_ == fxge::FontEncoding::kSymbol) { |
| return Unicode; |
| } |
| RetainPtr<CFX_Face> face = m_pFont->GetFace(); |
| for (size_t i = 0; i < face->GetCharMapCount(); i++) { |
| fxge::FontEncoding encoding_id = face->GetCharMapEncodingByIndex(i); |
| if (encoding_id == fxge::FontEncoding::kUnicode || |
| encoding_id == fxge::FontEncoding::kSymbol) { |
| return Unicode; |
| } |
| } |
| return kInvalidCharCode; |
| } |
| |
| std::unique_ptr<CFX_UnicodeEncodingEx> FX_CreateFontEncodingEx( |
| CFX_Font* pFont) { |
| if (!pFont || !pFont->GetFace()) { |
| return nullptr; |
| } |
| |
| for (fxge::FontEncoding id : kEncodingIDs) { |
| auto pFontEncoding = FXFM_CreateFontEncoding(pFont, id); |
| if (pFontEncoding) |
| return pFontEncoding; |
| } |
| return nullptr; |
| } |