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
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
|
// -*- related-file-name: "../../libefont/otf.cc" -*-
#ifndef EFONT_OTF_HH
#define EFONT_OTF_HH
#include <efont/otfdata.hh>
#include <lcdf/hashcode.hh>
class ErrorHandler;
namespace Efont { namespace OpenType {
class Post;
class Name;
typedef int Glyph; // 16-bit integer
class Tag { public:
Tag() : _tag(0U) { }
explicit Tag(uint32_t tag) : _tag(tag) { }
Tag(const char *name);
Tag(const String &name);
// default destructor
bool null() const { return _tag == 0; }
operator bool() const { return _tag != 0; }
bool valid() const;
uint32_t value() const { return _tag; }
String text() const;
static String langsys_text(Tag script, Tag langsys = Tag());
const uint8_t* table_entry(const uint8_t* table, int n, int entry_size) const;
const char* script_description() const;
const char* language_description() const;
const char* feature_description() const;
private:
uint32_t _tag;
};
class Font { public:
Font(const String&, ErrorHandler* = 0);
// default destructor
bool ok() const { return _error >= 0; }
bool check_checksums(ErrorHandler * = 0) const;
int error() const { return _error; }
const String& data_string() const { return _str; }
const uint8_t* data() const { return _str.udata(); }
int length() const { return _str.length(); }
int ntables() const;
bool has_table(Tag tag) const;
String table(Tag tag) const;
uint32_t table_checksum(Tag tag) const;
Tag table_tag(int i) const;
static uint32_t checksum(const uint8_t *, const uint8_t *);
static uint32_t checksum(const String &);
static Font make(bool truetype, const Vector<Tag>& tags, const Vector<String>& data);
enum { HEADER_SIZE = 12, TABLE_DIR_ENTRY_SIZE = 16 };
private:
String _str;
int _error;
int parse_header(ErrorHandler*);
};
class ScriptList { public:
ScriptList() { }
inline ScriptList(const String&, ErrorHandler* = 0);
int assign(const String&, ErrorHandler* = 0);
// default destructor
bool ok() const { return _str.length() > 0; }
int language_systems(Vector<Tag>& scripts, Vector<Tag>& langsys, ErrorHandler* = 0) const;
int features(Tag script, Tag langsys, int& required_fid, Vector<int>& fids, ErrorHandler* = 0, bool clear_fids = true) const;
private:
enum { SCRIPTLIST_HEADERSIZE = 2, SCRIPT_RECSIZE = 6,
SCRIPT_HEADERSIZE = 4, LANGSYS_RECSIZE = 6,
LANGSYS_HEADERSIZE = 6, FEATURE_RECSIZE = 2 };
String _str;
int check_header(ErrorHandler*);
int script_offset(Tag) const;
int check_script(Tag, int, ErrorHandler*) const;
int langsys_offset(Tag, Tag, ErrorHandler* = 0) const;
};
class FeatureList { public:
FeatureList() { }
inline FeatureList(const String&, ErrorHandler* = 0);
int assign(const String&, ErrorHandler* = 0);
// default destructor
bool ok() const { return _str.length() > 0; }
Tag tag(int fid) const;
String params(int fid, int length, ErrorHandler* = 0, bool old_style_offset = false) const;
String size_params(int fid, const Name& name, ErrorHandler* = 0) const;
int lookups(int fid, Vector<int>& results, ErrorHandler* = 0, bool clear_results = true) const;
int find(Tag, const Vector<int>& fids) const;
void filter(Vector<int>& fids, const Vector<Tag>& sorted_ftags) const;
inline void filter(Vector<int>& fids, Tag ftag) const;
int lookups(const Vector<int>& fids, Vector<int>& results, ErrorHandler* = 0) const;
int lookups(const Vector<int>& required_fids, const Vector<int>& fids, const Vector<Tag>& sorted_ftags, Vector<int>& results, ErrorHandler* = 0) const;
int lookups(int required_fid, const Vector<int>& fids, const Vector<Tag>& sorted_ftags, Vector<int>& results, ErrorHandler* = 0) const;
int lookups(const ScriptList&, Tag script, Tag langsys, const Vector<Tag>& sorted_ftags, Vector<int>& results, ErrorHandler* = 0) const;
private:
enum { FEATURELIST_HEADERSIZE = 2, FEATURE_RECSIZE = 6,
FEATURE_HEADERSIZE = 4, LOOKUPLIST_RECSIZE = 2 };
String _str;
int check_header(ErrorHandler*);
int script_offset(Tag) const;
int langsys_offset(Tag, Tag, ErrorHandler* = 0) const;
};
class Coverage { public:
Coverage() throw (); // empty coverage
Coverage(Glyph first, Glyph last) throw (); // range coverage
Coverage(const String&, ErrorHandler* = 0, bool check = true) throw ();
// default destructor
bool ok() const throw () { return _str.length() > 0; }
int size() const throw ();
int coverage_index(Glyph) const throw ();
bool covers(Glyph g) const throw () { return coverage_index(g) >= 0; }
void unparse(StringAccum&) const throw ();
String unparse() const throw ();
class iterator { public:
iterator() : _pos(0), _value(0) { }
// private constructor
// default destructor
bool ok() const { return _pos < _str.length(); }
operator bool() const { return ok(); }
Glyph operator*() const { return _value; }
Glyph value() const { return _value; }
int coverage_index() const;
void operator++(int);
void operator++() { (*this)++; }
bool forward_to(Glyph);
// XXX should check iterators are of same type
bool operator<(const iterator& o) { return _value < o._value; }
bool operator<=(const iterator& o) { return _value <= o._value; }
bool operator>=(const iterator& o) { return _value >= o._value; }
bool operator>(const iterator& o) { return _value > o._value; }
bool operator==(const iterator& o) { return _value == o._value; }
bool operator!=(const iterator& o) { return _value != o._value; }
private:
String _str;
int _pos;
Glyph _value;
friend class Coverage;
iterator(const String&, int);
};
iterator begin() const { return iterator(_str, 0); }
iterator end() const { return iterator(_str, _str.length()); }
Glyph operator[](int) const throw ();
enum { T_LIST = 1, T_RANGES = 2,
HEADERSIZE = 4, LIST_RECSIZE = 2, RANGES_RECSIZE = 6 };
private:
String _str;
int check(ErrorHandler*);
};
Coverage operator&(const Coverage&, const Coverage&);
bool operator<=(const Coverage&, const Coverage&);
inline bool operator>=(const Coverage& a, const Coverage& b)
{
return b <= a;
}
class GlyphSet { public:
GlyphSet();
GlyphSet(const GlyphSet&);
~GlyphSet();
inline bool covers(Glyph g) const;
inline bool operator[](Glyph g) const;
int change(Glyph, bool);
void insert(Glyph g) { change(g, true); }
void remove(Glyph g) { change(g, false); }
GlyphSet& operator=(const GlyphSet&);
private:
enum { GLYPHBITS = 16, SHIFT = 8,
MAXGLYPH = (1 << GLYPHBITS) - 1, UNSHIFT = GLYPHBITS - SHIFT,
MASK = (1 << UNSHIFT) - 1, VLEN = (1 << SHIFT),
VULEN = (1 << UNSHIFT) >> 5
};
uint32_t* _v[VLEN];
};
class ClassDef { public:
ClassDef(const String&, ErrorHandler* = 0) throw ();
// default destructor
bool ok() const { return _str.length() > 0; }
int nclass() const throw ();
int lookup(Glyph) const throw ();
int operator[](Glyph g) const throw () { return lookup(g); }
void unparse(StringAccum&) const throw ();
String unparse() const throw ();
class class_iterator { public:
// private constructor
// default destructor
bool ok() const { return _pos < _str.length(); }
operator bool() const { return ok(); }
Glyph operator*() const { return *_coviter; }
Glyph value() const { return *_coviter; }
int class_value() const { return _class; }
void operator++(int);
void operator++() { (*this)++; }
// XXX should check iterators are of same type
bool operator<(const class_iterator& o) { return _coviter < o._coviter; }
bool operator<=(const class_iterator& o) { return _coviter <= o._coviter; }
bool operator>=(const class_iterator& o) { return _coviter >= o._coviter; }
bool operator>(const class_iterator& o) { return _coviter > o._coviter; }
bool operator==(const class_iterator& o) { return _coviter == o._coviter; }
bool operator!=(const class_iterator& o) { return _coviter != o._coviter; }
private:
String _str;
int _pos;
int _class;
Coverage::iterator _coviter;
friend class ClassDef;
class_iterator(const String&, int, int, const Coverage::iterator&);
void increment_class0();
enum { FIRST_POS = -1, LAST_POS = -2 };
};
// XXX does not work correctly for class 0
class_iterator begin(int c) const { return class_iterator(_str, 0, c, Coverage::iterator()); }
class_iterator begin(int c, const Coverage& coverage) const { return class_iterator(_str, 0, c, coverage.begin()); }
class_iterator end(int c) const { return class_iterator(_str, _str.length(), c, Coverage::iterator()); }
enum { T_LIST = 1, T_RANGES = 2,
LIST_HEADERSIZE = 6, LIST_RECSIZE = 2,
RANGES_HEADERSIZE = 4, RANGES_RECSIZE = 6 };
private:
String _str;
int check(ErrorHandler*);
};
extern Vector<PermString> debug_glyph_names;
inline bool operator==(Tag t1, uint32_t t2)
{
return t1.value() == t2;
}
inline bool operator!=(Tag t1, uint32_t t2)
{
return t1.value() != t2;
}
inline bool operator<(Tag t1, uint32_t t2)
{
return t1.value() < t2;
}
inline bool operator>(Tag t1, uint32_t t2)
{
return t1.value() > t2;
}
inline bool operator<=(Tag t1, uint32_t t2)
{
return t1.value() <= t2;
}
inline bool operator>=(Tag t1, uint32_t t2)
{
return t1.value() >= t2;
}
inline bool operator==(Tag t1, Tag t2)
{
return t1.value() == t2.value();
}
inline bool operator!=(Tag t1, Tag t2)
{
return t1.value() != t2.value();
}
inline bool operator<(Tag t1, Tag t2)
{
return t1.value() < t2.value();
}
inline ScriptList::ScriptList(const String& str, ErrorHandler* errh)
{
assign(str, errh);
}
inline FeatureList::FeatureList(const String& str, ErrorHandler* errh)
{
assign(str, errh);
}
inline void FeatureList::filter(Vector<int>& fids, Tag ftag) const
{
Vector<Tag> tags;
tags.push_back(ftag);
filter(fids, tags);
}
inline bool GlyphSet::covers(Glyph g) const
{
if ((unsigned)g > MAXGLYPH)
return false;
else if (const uint32_t* u = _v[g >> SHIFT])
return (u[(g & MASK) >> 5] & (1 << (g & 0x1F))) != 0;
else
return false;
}
inline bool GlyphSet::operator[](Glyph g) const
{
return covers(g);
}
}}
inline hashcode_t hashcode(Efont::OpenType::Tag t)
{
return t.value();
}
#endif
|