blob: 58521979af15861872ffcb4eb80ae2f392b18837 (
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
|
/*************************************************************************
** VheaTable.hpp **
** **
** This file is part of dvisvgm -- a fast DVI to SVG converter **
** Copyright (C) 2005-2024 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/>. **
*************************************************************************/
#pragma once
#include <limits>
#include "TTFTable.hpp"
namespace ttf {
/** This class provides the functions required to write the vertical header table of a TTF/OTF font.
* https://www.microsoft.com/typography/otspec/vhea.htm */
class VheaTable : public TTFTable {
friend class TTFWriter;
public:
uint32_t tag () const override {return name2id("vhea");}
void write (std::ostream &os) const override;
protected:
void updateYMinMax (uint32_t c, int16_t ymin, int16_t ymax);
void updateAdvanceHeight (uint16_t h, uint16_t numberOfVMetrics);
private:
uint16_t _advanceHeightMax = 0;
int16_t _minTopSideBearing = std::numeric_limits<int16_t>::max();
int16_t _minBottomSideBearing = std::numeric_limits<int16_t>::max();
int16_t _yMaxExtent = std::numeric_limits<int16_t>::min();
uint16_t _numberOfVMetrics = 0;
};
} // namespace ttf
|