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authorNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
committerNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
commite0c6872cf40896c7be36b11dcc744620f10adf1d (patch)
tree60335e10d2f4354b0674ec22d7b53f0f8abee672 /dviware/dvisvgm/src/FontEncoding.cpp
Initial commit
Diffstat (limited to 'dviware/dvisvgm/src/FontEncoding.cpp')
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diff --git a/dviware/dvisvgm/src/FontEncoding.cpp b/dviware/dvisvgm/src/FontEncoding.cpp
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+++ b/dviware/dvisvgm/src/FontEncoding.cpp
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+/*************************************************************************
+** FontEncoding.cpp **
+** **
+** This file is part of dvisvgm -- a fast DVI to SVG converter **
+** Copyright (C) 2005-2019 Martin Gieseking <martin.gieseking@uos.de> **
+** **
+** This program is free software; you can redistribute it and/or **
+** modify it under the terms of the GNU General Public License as **
+** published by the Free Software Foundation; either version 3 of **
+** the License, or (at your option) any later version. **
+** **
+** This program is distributed in the hope that it will be useful, but **
+** WITHOUT ANY WARRANTY; without even the implied warranty of **
+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the **
+** GNU General Public License for more details. **
+** **
+** You should have received a copy of the GNU General Public License **
+** along with this program; if not, see <http://www.gnu.org/licenses/>. **
+*************************************************************************/
+
+#include "CMap.hpp"
+#include "CMapManager.hpp"
+#include "EncFile.hpp"
+#include "FileFinder.hpp"
+#include "FontEncoding.hpp"
+#include "utility.hpp"
+
+using namespace std;
+
+/** Returns the encoding object for a given encoding name.
+ * @param[in] encname name of the encoding to lookup
+ * @return pointer to encoding object, or 0 if there is no encoding defined */
+FontEncoding* FontEncoding::encoding (const string &encname) {
+ if (encname.empty())
+ return nullptr;
+
+ using EncodingMap = unordered_map<string, unique_ptr<EncFile>>;
+ static EncodingMap encmap;
+ // initially, try to find an .enc file with the given name
+ auto it = encmap.find(encname);
+ if (it != encmap.end())
+ return it->second.get();
+ if (FileFinder::instance().lookup(encname + ".enc", false)) {
+ auto state = encmap.emplace(encname, util::make_unique<EncFile>(encname));
+ return state.first->second.get();
+ }
+ // no .enc file found => try to find a CMap
+ if (CMap *cmap = CMapManager::instance().lookup(encname))
+ return cmap;
+ return nullptr;
+}
+
+/////////////////////////////////////////////////////////////////////////
+
+Character FontEncodingPair::decode (uint32_t c) const {
+ if (_enc1) {
+ Character chr = _enc1->decode(c);
+ if (_enc2 && chr.type() != Character::NAME)
+ chr = _enc2->decode(chr.number());
+ return chr;
+ }
+ return Character(Character::INDEX, 0);
+}
+
+
+bool FontEncodingPair::mapsToCharIndex () const {
+ if (_enc2)
+ return _enc2->mapsToCharIndex();
+ if (_enc1)
+ return _enc1->mapsToCharIndex();
+ return false;
+}
+
+
+const FontEncoding* FontEncodingPair::findCompatibleBaseFontMap (const PhysicalFont *font, CharMapID &charmapID) const {
+ if (_enc2)
+ return _enc2->findCompatibleBaseFontMap(font, charmapID);
+ if (_enc1)
+ return _enc1->findCompatibleBaseFontMap(font, charmapID);
+ return nullptr;
+}
+
+
+void FontEncodingPair::assign (const FontEncoding *enc) {
+ if (!_enc1)
+ _enc1 = enc;
+ else
+ _enc2 = enc;
+}