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/*************************************************************************
** TrueTypeFont.hpp **
** **
** 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/>. **
*************************************************************************/
#ifndef TRUETYPEFONT_HPP
#define TRUETYPEFONT_HPP
#include <istream>
#include <fstream>
#include <ostream>
#include <string>
#include <vector>
#include "MessageException.hpp"
class TrueTypeFont {
struct TTFTableRecord {
std::string name () const;
uint32_t paddedSize () const {return (size+3) & ~3;}
uint32_t computeChecksum () const;
uint32_t tag; ///< table tag
uint32_t checksum; ///< checksum of the table data
uint32_t size; ///< number of bytes in the table
const uint8_t *data; ///< points to the begin of the table
};
struct WOFFTableRecord {
WOFFTableRecord (uint32_t off, const TTFTableRecord &rec) : offset(off), size(rec.size), data(rec.data), ttfRecord(rec) {}
size_t paddedSize () const {return (size+3) & ~3;}
bool compressTableData ();
uint32_t offset; ///< file offset to first byte of the table
uint32_t size; ///< number of bytes in the table
const uint8_t *data; ///< points to the begin of the WOFF table
std::vector<uint8_t> compressedData; ///< compressed table data
const TTFTableRecord &ttfRecord; ///< corresponding TTF table record
};
public:
TrueTypeFont () : _version(0) {}
explicit TrueTypeFont (const std::string &fname) {read(fname);}
bool read (const std::string &fname);
void writeWOFF (std::ostream &os) const;
void writeWOFF (const std::string &fname) const;
bool writeWOFF2 (std::ostream &os) const;
bool writeWOFF2 (const std::string &fname) const;
private:
uint32_t _version; ///< TTF version
std::string _buffer; ///< contents of TTF file
std::vector<TTFTableRecord> _tableRecords;
};
struct TrueTypeFontException : public MessageException {
explicit TrueTypeFontException (const std::string &msg) : MessageException(msg) {}
};
#endif
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