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/*************************************************************************
** FontEncoding.cpp **
** **
** This file is part of dvisvgm -- a fast DVI to SVG converter **
** Copyright (C) 2005-2023 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;
}
bool FontEncodingPair::mapsToUnicode () const {
if (_enc2)
return _enc2->mapsToUnicode();
if (_enc1)
return _enc1->mapsToUnicode();
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;
}
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