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
|
// SPDX-License-Identifier: MIT OR MPL-2.0 OR LGPL-2.1-or-later OR GPL-2.0-or-later
// Copyright 2010, SIL International, All rights reserved.
#include "graphite2/Segment.h"
#include "inc/UtfCodec.h"
#include "inc/Segment.h"
using namespace graphite2;
namespace
{
gr_segment* makeAndInitialize(const Font *font, const Face *face, uint32 script, const Features* pFeats/*must not be NULL*/, gr_encform enc, const void* pStart, size_t nChars, int dir)
{
if (script == 0x20202020) script = 0;
else if ((script & 0x00FFFFFF) == 0x00202020) script = script & 0xFF000000;
else if ((script & 0x0000FFFF) == 0x00002020) script = script & 0xFFFF0000;
else if ((script & 0x000000FF) == 0x00000020) script = script & 0xFFFFFF00;
// if (!font) return NULL;
Segment* pRes=new Segment(nChars, face, script, dir);
if (!pRes->read_text(face, pFeats, enc, pStart, nChars) || !pRes->runGraphite())
{
delete pRes;
return NULL;
}
pRes->finalise(font, true);
return static_cast<gr_segment*>(pRes);
}
template <typename utf_iter>
inline size_t count_unicode_chars(utf_iter first, const utf_iter last, const void **error)
{
size_t n_chars = 0;
uint32 usv = 0;
if (last)
{
if (!first.validate(last))
{
if (error) *error = last - 1;
return 0;
}
for (;first != last; ++first, ++n_chars)
if ((usv = *first) == 0 || first.error()) break;
}
else
{
while ((usv = *first) != 0 && !first.error())
{
++first;
++n_chars;
}
}
if (error) *error = first.error() ? first : 0;
return n_chars;
}
}
extern "C" {
size_t gr_count_unicode_characters(gr_encform enc, const void* buffer_begin, const void* buffer_end/*don't go on or past end, If NULL then ignored*/, const void** pError) //Also stops on nul. Any nul is not in the count
{
assert(buffer_begin);
switch (enc)
{
case gr_utf8: return count_unicode_chars<utf8::const_iterator>(buffer_begin, buffer_end, pError); break;
case gr_utf16: return count_unicode_chars<utf16::const_iterator>(buffer_begin, buffer_end, pError); break;
case gr_utf32: return count_unicode_chars<utf32::const_iterator>(buffer_begin, buffer_end, pError); break;
default: return 0;
}
}
gr_segment* gr_make_seg(const gr_font *font, const gr_face *face, gr_uint32 script, const gr_feature_val* pFeats, gr_encform enc, const void* pStart, size_t nChars, int dir)
{
if (!face) return nullptr;
const gr_feature_val * tmp_feats = 0;
if (pFeats == 0)
pFeats = tmp_feats = static_cast<const gr_feature_val*>(face->theSill().cloneFeatures(0));
gr_segment * seg = makeAndInitialize(font, face, script, pFeats, enc, pStart, nChars, dir);
delete static_cast<const FeatureVal*>(tmp_feats);
return seg;
}
void gr_seg_destroy(gr_segment* p)
{
delete static_cast<Segment*>(p);
}
float gr_seg_advance_X(const gr_segment* pSeg/*not NULL*/)
{
assert(pSeg);
return pSeg->advance().x;
}
float gr_seg_advance_Y(const gr_segment* pSeg/*not NULL*/)
{
assert(pSeg);
return pSeg->advance().y;
}
unsigned int gr_seg_n_cinfo(const gr_segment* pSeg/*not NULL*/)
{
assert(pSeg);
return static_cast<unsigned int>(pSeg->charInfoCount());
}
const gr_char_info* gr_seg_cinfo(const gr_segment* pSeg/*not NULL*/, unsigned int index/*must be <number_of_CharInfo*/)
{
assert(pSeg);
return static_cast<const gr_char_info*>(pSeg->charinfo(index));
}
unsigned int gr_seg_n_slots(const gr_segment* pSeg/*not NULL*/)
{
assert(pSeg);
return static_cast<unsigned int>(pSeg->slotCount());
}
const gr_slot* gr_seg_first_slot(gr_segment* pSeg/*not NULL*/)
{
assert(pSeg);
return static_cast<const gr_slot*>(pSeg->first());
}
const gr_slot* gr_seg_last_slot(gr_segment* pSeg/*not NULL*/)
{
assert(pSeg);
return static_cast<const gr_slot*>(pSeg->last());
}
float gr_seg_justify(gr_segment* pSeg/*not NULL*/, const gr_slot* pSlot/*not NULL*/, const gr_font *pFont, double width, enum gr_justFlags flags, const gr_slot *pFirst, const gr_slot *pLast)
{
assert(pSeg);
assert(pSlot);
return pSeg->justify(const_cast<gr_slot *>(pSlot), pFont, float(width), justFlags(flags), const_cast<gr_slot *>(pFirst), const_cast<gr_slot *>(pLast));
}
} // extern "C"
|