blob: f2fd3027eb2c0ad349e14fadda064c2c6b6d2401 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
|
/*************************************************************************
** 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 () : _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=0;
uint16_t _firstChar=0, _lastChar=0;
double _designSize=0; ///< 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
|
