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
|
/* Copyright (C) 2001-2023 Artifex Software, Inc.
All Rights Reserved.
This software is provided AS-IS with no warranty, either express or
implied.
This software is distributed under license and may not be copied,
modified or distributed except as expressly authorized under the terms
of the license contained in the file LICENSE in this distribution.
Refer to licensing information at http://www.artifex.com or contact
Artifex Software, Inc., 39 Mesa Street, Suite 108A, San Francisco,
CA 94129, USA, for further information.
*/
/* CMap and CID-keyed font services */
#include "ghost.h"
#include "ierrors.h"
#include "gxcid.h"
#include "icid.h" /* for checking prototype */
#include "idict.h"
#include "idparam.h"
#include "store.h"
#include "oper.h"
#include "gserrors.h"
/* Get the information from a CIDSystemInfo dictionary. */
int
cid_system_info_param(gs_cid_system_info_t *pcidsi, const ref *prcidsi)
{
ref *pregistry;
ref *pordering;
int code;
if (!r_has_type(prcidsi, t_dictionary))
return_error(gs_error_typecheck);
if (dict_find_string(prcidsi, "Registry", &pregistry) <= 0 ||
dict_find_string(prcidsi, "Ordering", &pordering) <= 0
)
return_error(gs_error_rangecheck);
check_read_type_only(*pregistry, t_string);
check_read_type_only(*pordering, t_string);
pcidsi->Registry.data = pregistry->value.const_bytes;
pcidsi->Registry.size = r_size(pregistry);
pcidsi->Ordering.data = pordering->value.const_bytes;
pcidsi->Ordering.size = r_size(pordering);
code = dict_int_param(prcidsi, "Supplement", 0, max_int, -1,
&pcidsi->Supplement);
return (code < 0 ? code : 0);
}
/* Convert a CID into TT char code or to TT glyph index. */
static bool
TT_char_code_from_CID_no_subst(const gs_memory_t *mem,
const ref *Decoding, const ref *TT_cmap, uint nCID, uint *c)
{ ref *DecodingArray, char_code, char_code1, ih, *glyph_index;
bool found = false;
int i = nCID % 256, n;
make_int(&ih, nCID / 256);
if (dict_find(Decoding, &ih, &DecodingArray) <= 0 ||
!r_has_type(DecodingArray, t_array) ||
array_get(mem, DecodingArray, i, &char_code) < 0)
return false;
if (r_has_type(&char_code, t_integer))
n = 1;
else if (r_has_type(&char_code, t_array)) {
DecodingArray = &char_code;
i = 0;
n = r_size(DecodingArray);
} else
return false; /* Must not happen. */
for (;n--; i++) {
int code;
if (array_get(mem, DecodingArray, i, &char_code1) < 0 ||
!r_has_type(&char_code1, t_integer))
return false; /* Must not happen. */
code = dict_find(TT_cmap, &char_code1, &glyph_index);
if (code > 0 && r_has_type(glyph_index, t_integer)) {
*c = glyph_index->value.intval;
found = true;
if (*c != 0)
return true;
}
}
return found;
}
/* Convert a CID into a TT char code or into a TT glyph index, using SubstNWP. */
/* Returns 1 if a glyph presents, 0 if not, <0 if error. */
int
cid_to_TT_charcode(const gs_memory_t *mem,
const ref *Decoding, const ref *TT_cmap, const ref *SubstNWP,
uint nCID, uint *c, ref *src_type, ref *dst_type)
{
int SubstNWP_length = r_size(SubstNWP), i, code;
if (TT_char_code_from_CID_no_subst(mem, Decoding, TT_cmap, nCID, c)) {
make_null(src_type);
/* Leaving dst_type uninitialized. */
return 1;
}
for (i = 0; i < SubstNWP_length; i += 5) {
ref rb, re, rs;
int nb, ne, ns;
if ((code = array_get(mem, SubstNWP, i + 1, &rb)) < 0)
return code;
if ((code = array_get(mem, SubstNWP, i + 2, &re)) < 0)
return code;
if ((code = array_get(mem, SubstNWP, i + 3, &rs)) < 0)
return code;
nb = rb.value.intval;
ne = re.value.intval;
ns = rs.value.intval;
if (nCID >= nb && nCID <= ne)
if (TT_char_code_from_CID_no_subst(mem, Decoding, TT_cmap, ns + (nCID - nb), c)) {
if ((code = array_get(mem, SubstNWP, i + 0, src_type)) < 0)
return code;
if ((code = array_get(mem, SubstNWP, i + 4, dst_type)) < 0)
return code;
return 1;
}
if (nCID >= ns && nCID <= ns + (ne - nb))
if (TT_char_code_from_CID_no_subst(mem, Decoding, TT_cmap, nb + (nCID - ns), c)) {
if ((code = array_get(mem, SubstNWP, i + 0, dst_type)) < 0)
return code;
if ((code = array_get(mem, SubstNWP, i + 4, src_type)) < 0)
return code;
return 1;
}
}
*c = 0;
return 0;
}
/* Set a CIDMap element. */
static int
set_CIDMap_element(const gs_memory_t *mem, ref *CIDMap, uint cid, uint glyph_index)
{ /* Assuming the CIDMap is already type-checked. */
/* Assuming GDBytes == 2. */
int offset = cid * 2;
int count = r_size(CIDMap), size, i;
ref s;
uchar *c;
if (glyph_index >= 65536)
return_error(gs_error_rangecheck); /* Can't store with GDBytes == 2. */
for (i = 0; i < count; i++) {
array_get(mem, CIDMap, i, &s);
size = r_size(&s) & ~1;
if (offset < size) {
c = s.value.bytes + offset;
c[0] = (uchar)(glyph_index >> 8);
c[1] = (uchar)(glyph_index & 255);
break;
}
offset -= size;
}
/* We ignore the substitution if it goes out the CIDMap range.
It must not happen, except for empty Decoding elements */
return 0;
}
/* Create a CIDMap from a True Type cmap array, Decoding and SubstNWP. */
int
cid_fill_CIDMap(const gs_memory_t *mem,
const ref *Decoding, const ref *TT_cmap, const ref *SubstNWP, int GDBytes,
ref *CIDMap)
{ int dict_enum;
ref el[2];
int count, i;
if (GDBytes != 2)
return_error(gs_error_unregistered); /* Unimplemented. */
if (r_type(CIDMap) != t_array)
return_error(gs_error_unregistered); /* Unimplemented. It could be a single string. */
count = r_size(CIDMap);
/* Checking the CIDMap structure correctness : */
for (i = 0; i < count; i++) {
ref s;
int code = array_get(mem, CIDMap, i, &s);
if (code < 0)
return code;
check_type(s, t_string); /* fixme : optimize with moving to TT_char_code_from_CID. */
}
/* Compute the CIDMap : */
dict_enum = dict_first(Decoding);
for (;;) {
int index, count, i;
if ((dict_enum = dict_next(Decoding, dict_enum, el)) == -1)
break;
if (!r_has_type(&el[0], t_integer))
continue;
if (!r_has_type(&el[1], t_array))
return_error(gs_error_typecheck);
index = el[0].value.intval;
count = r_size(&el[1]);
for (i = 0; i < count; i++) {
uint cid = index * 256 + i, glyph_index;
ref src_type, dst_type;
int code = cid_to_TT_charcode(mem, Decoding, TT_cmap, SubstNWP,
cid, &glyph_index, &src_type, &dst_type);
if (code < 0)
return code;
if (code > 0) {
code = set_CIDMap_element(mem, CIDMap, cid, glyph_index);
if (code < 0)
return code;
}
}
}
return 0;
}
int
cid_fill_Identity_CIDMap(const gs_memory_t *mem,
ref *CIDMap)
{ int count, i;
count = r_size(CIDMap);
if (count != 3)
return_error(gs_error_rangecheck);
/* Checking the CIDMap structure correctness : */
for (i = 0; i < count; i++) {
ref s;
int code = array_get(mem, CIDMap, i, &s);
if (code < 0)
return code;
check_type(s, t_string); /* fixme : optimize with moving to TT_char_code_from_CID. */
}
for (i=0; i < 255*255; i++) {
int code;
code = set_CIDMap_element(mem, CIDMap, i, i);
if (code < 0)
return code;
}
return 0;
}
|
