File: metrics.cc

package info (click to toggle)
lcdf-typetools 2.105~dfsg-2
  • links: PTS, VCS
  • area: main
  • in suites: stretch
  • size: 3,100 kB
  • ctags: 4,798
  • sloc: cpp: 35,107; ansic: 1,861; sh: 1,254; makefile: 269
file content (130 lines) | stat: -rw-r--r-- 3,150 bytes parent folder | download | duplicates (2)
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
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
// -*- related-file-name: "../include/efont/metrics.hh" -*-

/* metrics.{cc,hh} -- generic font metrics
 *
 * Copyright (c) 1998-2012 Eddie Kohler
 *
 * 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 2 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.
 */

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <efont/metrics.hh>
#include <efont/t1cs.hh>        /* for UNKDOUBLE */
namespace Efont {

Metrics::Metrics()
  : _name_map(-1),
    _scale(1), _fdv(fdLast, UNKDOUBLE),
    _xt_map(0),
    _uses(0)
{
  _xt.push_back((MetricsXt *)0);
}


Metrics::Metrics(PermString font_name, PermString full_name, const Metrics &m)
  : _font_name(font_name),
    _family(m._family), _full_name(full_name), _version(m._version),
    _name_map(m._name_map), _names(m._names), _encoding(m._encoding),
    _scale(1), _fdv(fdLast, UNKDOUBLE),
    _pairp(m._pairp),
    _xt_map(0),
    _uses(0)
{
  reserve_glyphs(m._wdv.size());
  _kernv.resize(m._kernv.size(), UNKDOUBLE);
  _xt.push_back((MetricsXt *)0);
}


Metrics::~Metrics()
{
  assert(_uses == 0);
  for (int i = 1; i < _xt.size(); i++)
    delete _xt[i];
}


void
Metrics::set_font_name(PermString n)
{
  assert(!_font_name);
  _font_name = n;
}


void
Metrics::reserve_glyphs(int amt)
{
  if (amt <= _wdv.size()) return;
  _wdv.resize(amt, UNKDOUBLE);
  _lfv.resize(amt, UNKDOUBLE);
  _rtv.resize(amt, UNKDOUBLE);
  _tpv.resize(amt, UNKDOUBLE);
  _btv.resize(amt, UNKDOUBLE);
  _encoding.reserve_glyphs(amt);
  _pairp.reserve_glyphs(amt);
  for (int i = 1; i < _xt.size(); i++)
    _xt[i]->reserve_glyphs(amt);
}


GlyphIndex
Metrics::add_glyph(PermString n)
{
  if (nglyphs() >= _wdv.size())
    reserve_glyphs(nglyphs() ? nglyphs() * 2 : 64);
  GlyphIndex gi = _names.size();
  _names.push_back(n);
  _name_map.insert(n, gi);
  return gi;
}


static void
set_dimen(Vector<double> &dest, const Vector<double> &src, double scale,
          bool increment)
{
  int c = src.size();
  if (increment)
    for (int i = 0; i < c; i++)
      dest.at_u(i) += src.at_u(i) * scale;
  else if (scale < 0.9999 || scale > 1.0001)
    for (int i = 0; i < c; i++)
      dest.at_u(i) = src.at_u(i) * scale;
  else
    dest = src;
}

void
Metrics::interpolate_dimens(const Metrics &m, double scale, bool increment)
{
  set_dimen(_fdv, m._fdv, scale, increment);
  set_dimen(_wdv, m._wdv, scale, increment);
  set_dimen(_lfv, m._lfv, scale, increment);
  set_dimen(_rtv, m._rtv, scale, increment);
  set_dimen(_tpv, m._tpv, scale, increment);
  set_dimen(_btv, m._btv, scale, increment);
  set_dimen(_kernv, m._kernv, scale, increment);
}


void
Metrics::add_xt(MetricsXt *mxt)
{
  int n = _xt.size();
  _xt.push_back(mxt);
  _xt_map.insert(mxt->kind(), n);
  if (_wdv.size() > 0)
    mxt->reserve_glyphs(_wdv.size());
}

}