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/*************************************************************************
** FontManager.cpp **
** **
** This file is part of dvisvgm -- the DVI to SVG converter **
** Copyright (C) 2005-2010 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 <cstdlib>
#include <fstream>
#include "Font.h"
#include "FontEncoding.h"
#include "FontManager.h"
#include "FileFinder.h"
#include "Message.h"
#include "macros.h"
using namespace std;
FontManager::~FontManager () {
FORALL(_fonts, vector<Font*>::iterator, i)
delete *i;
}
/** Returns the singleton instance */
FontManager& FontManager::instance () {
static FontManager fm;
return fm;
}
/** Returns a unique ID that identifies the font.
* @param[in] n local font number, as used in DVI and VF files
* @return non-negative font ID if font was found, -1 otherwise */
int FontManager::fontID (int n) const {
if (_vfStack.empty()) {
Num2IdMap::const_iterator it = _num2id.find(n);
return (it == _num2id.end()) ? -1 : it->second;
}
VfNum2IdMap::const_iterator vit = _vfnum2id.find(_vfStack.top());
if (vit == _vfnum2id.end())
return -1;
const Num2IdMap &num2id = vit->second;
Num2IdMap::const_iterator it = num2id.find(n);
return (it == num2id.end()) ? -1 : it->second;
}
/** Returns a unique ID that identifies the font. Not the font object but the
* font pointer is looked up to get the ID. Thus, two different pointers
* referencing different objects of the same font are mapped to different IDs.
* @param[in] font pointer to font object to be identified
* @return non-negative font ID if font was found, -1 otherwise */
int FontManager::fontID (const Font *font) const {
for (size_t i=0; i < _fonts.size(); i++)
if (_fonts[i] == font)
return i;
return -1;
}
/** Returns a unique ID that identifies the font.
* @param[in] name name of font to be identified, e.g. cmr10
* @return non-negative font ID if font was found, -1 otherwise */
int FontManager::fontID (const string &name) const {
map<string,int>::const_iterator it = _name2id.find(name);
if (it == _name2id.end())
return -1;
return it->second;
}
int FontManager::fontnum (int id) const {
if (id < 0 || size_t(id) > _fonts.size())
return -1;
if (_vfStack.empty()) {
FORALL(_num2id, Num2IdMap::const_iterator, i)
if (i->second == id)
return i->first;
}
else {
VfNum2IdMap::const_iterator it = _vfnum2id.find(_vfStack.top());
if (it == _vfnum2id.end())
return -1;
const Num2IdMap &num2id = it->second;
FORALL(num2id, Num2IdMap::const_iterator, i)
if (i->second == id)
return i->first;
}
return -1;
}
int FontManager::vfFirstFontNum (VirtualFont *vf) const {
VfFirstFontMap::const_iterator it = _vfFirstFontMap.find(vf);
return (it == _vfFirstFontMap.end()) ? -1 : (int) it->second;
}
/** Returns a previously registered font.
* @param[in] n local font number, as used in DVI and VF files
* @return pointer to font if font was found, 0 otherwise */
Font* FontManager::getFont (int n) const {
int id = fontID(n);
return (id < 0) ? 0 : _fonts[id];
}
Font* FontManager::getFont (const string &name) const {
int id = fontID(name);
if (id < 0)
return 0;
return _fonts[id];
}
Font* FontManager::getFontById (int id) const {
if (id < 0 || size_t(id) >= _fonts.size())
return 0;
return _fonts[id];
}
/** Returns the current active virtual font. */
VirtualFont* FontManager::getVF () const {
return _vfStack.empty() ? 0 : _vfStack.top();
}
/** Registers a new font to be managed by the FontManager. If there is
* already a registered font assigned to number n, nothing happens.
* @param[in] fontnum local font number, as used in DVI and VF files
* @param[in] name fontname, e.g. cmr10
* @param[in] checksum checksum to be compared with TFM checksum
* @param[in] dsize design size in TeX point units
* @param[in] ssize scaled size in TeX point units
* @return id of registered font */
int FontManager::registerFont (UInt32 fontnum, string name, UInt32 checksum, double dsize, double ssize) {
int id = fontID(fontnum);
if (id >= 0)
return id;
Font *newfont = 0;
int newid = _fonts.size(); // the new font gets this ID
Name2IdMap::iterator it = _name2id.find(name);
if (it != _name2id.end()) { // font with same name already registered?
Font *font = _fonts[it->second];
newfont = font->clone(dsize, ssize);
}
else {
if (FileFinder::lookup(name+".pfb"))
newfont = PhysicalFont::create(name, checksum, dsize, ssize, PhysicalFont::PFB);
else if (FileFinder::lookup(name+".ttf"))
newfont = PhysicalFont::create(name, checksum, dsize, ssize, PhysicalFont::TTF);
else if (FileFinder::lookup(name+".vf"))
newfont = VirtualFont::create(name, checksum, dsize, ssize);
else if (FileFinder::lookup(name+".mf"))
newfont = PhysicalFont::create(name, checksum, dsize, ssize, PhysicalFont::MF);
else {
newfont = new EmptyFont(name);
Message::wstream(true) << "font '" << name << "' not found\n";
}
_name2id[name] = newid;
}
_fonts.push_back(newfont);
if (_vfStack.empty()) // register font referenced in dvi file?
_num2id[fontnum] = newid;
else { // register font referenced in vf file
VirtualFont *vf = const_cast<VirtualFont*>(_vfStack.top());
_vfnum2id[vf][fontnum] = newid;
if (_vfFirstFontMap.find(vf) == _vfFirstFontMap.end()) // first fontdef of VF?
_vfFirstFontMap[vf] = fontnum;
}
return newid;
}
/** Enters a new virtual font frame.
* This method must be called before processing a VF character.
* @param[in] vf virtual font */
void FontManager::enterVF (VirtualFont *vf) {
if (vf)
_vfStack.push(vf);
}
/** Leaves a previously entered virtual font frame. */
void FontManager::leaveVF () {
if (!_vfStack.empty())
_vfStack.pop();
}
/** Assigns a sequence of DVI commands to a char code.
* @param[in] c character code
* @param[in] dvi points to vector with DVI commands */
void FontManager::assignVfChar (int c, vector<UInt8> *dvi) {
if (!_vfStack.empty() && dvi)
_vfStack.top()->assignChar(c, dvi);
}
ostream& FontManager::write (ostream &os, Font *font, int level) {
#if 0
if (font) {
int id = -1;
for (int i=0; i < fonts.size() && id < 0; i++)
if (fonts[i] == font)
id = i;
VirtualFont *vf = dynamic_cast<VirtualFont*>(font);
for (int j=0; j < level+1; j++)
os << " ";
os << "id " << id
<< " fontnum " << fontnum(id) << " "
<< (vf ? "VF" : "PF") << " "
<< font->name()
<< endl;
if (vf) {
enterVF(vf);
const Num2IdMap &num2id = vfnum2id.find(vf)->second;
FORALL(num2id, Num2IdMap::const_iterator, i) {
Font *font = fonts[i->second];
write(os, font, level+1);
}
leaveVF();
}
}
else {
for (int i=0; i < fonts.size(); i++)
write(os, fonts[i], level);
os << endl;
}
#endif
return os;
}
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