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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/TFM.hpp
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+/*************************************************************************
+** TFM.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 TFM_HPP
+#define TFM_HPP
+
+#include <istream>
+#include <string>
+#include <vector>
+#include "FixWord.hpp"
+#include "FontMetrics.hpp"
+#include "StreamReader.hpp"
+
+class StreamReader;
+
+class TFM : public FontMetrics
+{
+ public:
+ explicit TFM (std::istream &is);
+ double getCharWidth (int c) const override;
+ double getCharHeight (int c) const override;
+ double getCharDepth (int c) const override;
+ double getItalicCorr (int c) const override;
+ double getDesignSize () const override {return _designSize;}
+ double getSpace () const override;
+ double getSpaceStretch () const override;
+ double getSpaceShrink () const override;
+ double getQuad () const override;
+ double getAscent () const override {return double(_ascent)*_designSize;}
+ double getDescent () const override {return double(_descent)*_designSize;}
+ bool verticalLayout () const override {return false;}
+ uint32_t getChecksum () const override {return _checksum;}
+ uint16_t firstChar () const override {return _firstChar;}
+ uint16_t lastChar () const override {return _lastChar;}
+
+ protected:
+ TFM () : _checksum(0), _firstChar(0), _lastChar(0), _designSize(0), _params(7) {}
+ void readHeader (StreamReader &reader);
+ void readTables (StreamReader &reader, int nw, int nh, int nd, int ni);
+ void readParameters (StreamReader &reader, int np);
+ virtual int charIndex (int c) const;
+ void setCharRange (int firstchar, int lastchar) {_firstChar=firstchar; _lastChar=lastchar;}
+
+ private:
+ uint32_t _checksum;
+ uint16_t _firstChar, _lastChar;
+ double _designSize; ///< design size of the font in PS points (72bp = 1in)
+ std::vector<uint32_t> _charInfoTable;
+ std::vector<FixWord> _widthTable; ///< character widths in design size units
+ std::vector<FixWord> _heightTable; ///< character height in design size units
+ std::vector<FixWord> _depthTable; ///< character depth in design size units
+ std::vector<FixWord> _italicTable; ///< italic corrections in design size units
+ std::vector<FixWord> _params; ///< values of the TFM's param section
+ FixWord _ascent, _descent; ///< max. height and depth
+};
+
+#endif