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
|
/* Copyright (C) 2020-2021 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., 1305 Grant Avenue - Suite 200, Novato,
CA 94945, U.S.A., +1(415)492-9861, for further information.
*/
/* Font re-mapping */
#include "strmio.h"
#include "stream.h"
#include "scanchar.h"
#include "pdf_int.h"
#include "pdf_types.h"
#include "pdf_dict.h"
#include "pdf_stack.h"
#include "pdf_file.h"
#include "pdf_fmap.h"
typedef struct
{
const char *keyname;
const char *mappedname;
} pdfi_custom_fmap_entry;
pdfi_custom_fmap_entry pdfi_custom_fmap_enties[] =
{
{"Helv", "Helvetica"},
{NULL, NULL}
};
static int
pdf_fontmap_open_file(pdf_context *ctx, byte **buf, int *buflen)
{
int code = 0;
stream *s;
char fname[gp_file_name_sizeof];
const char *path_pfx = "Init/";
const char *fmap_default = "Fontmap.GS";
const char *prestring = "<<\n";
const char *poststring = ">>\nendstream\n";
const int prestringlen = strlen(prestring);
const int poststringlen = strlen(poststring);
fname[0] = '\0';
if (strlen(path_pfx) + strlen(fmap_default) + 1 > gp_file_name_sizeof)
return_error(gs_error_invalidfileaccess);
code = pdfi_open_resource_file(ctx, fmap_default, strlen(fmap_default), &s);
if (code < 0) {
strncat(fname, path_pfx, strlen(path_pfx));
strncat(fname, (char *)fmap_default, strlen(fmap_default));
code = pdfi_open_resource_file(ctx, fname, strlen(fname), &s);
}
if (code >= 0) {
int i;
sfseek(s, 0, SEEK_END);
*buflen = sftell(s);
sfseek(s, 0, SEEK_SET);
*buf = gs_alloc_bytes(ctx->memory, *buflen + prestringlen + poststringlen, "pdf_cmap_open_file(buf)");
if (*buf != NULL) {
memcpy(*buf, prestring, prestringlen);
sfread((*buf) + prestringlen, 1, *buflen, s);
memcpy((*buf) + *buflen + prestringlen, poststring, poststringlen);
*buflen += prestringlen + poststringlen;
/* This is naff, but works for now
When parsing Fontmap in PS, ";" is defined as "def"
*/
for (i = 0; i < *buflen - 1; i++) {
if ((*buf)[i] == ';') {
(*buf)[i] = ' ';
}
}
}
else {
code = gs_note_error(gs_error_VMerror);
}
sfclose(s);
}
return code;
}
static int
pdf_make_fontmap(pdf_context *ctx)
{
byte *fmapbuf = NULL;
int code, fmapbuflen;
pdf_c_stream *fmapstr = NULL;
pdf_stream fakedict = {0};
pdfi_custom_fmap_entry *pcfe = pdfi_custom_fmap_enties;
int i;
pdf_c_stream fakemainstream = {0};
code = pdf_fontmap_open_file(ctx, &fmapbuf, &fmapbuflen);
if (code < 0)
return code;
code = pdfi_open_memory_stream_from_memory(ctx, fmapbuflen, fmapbuf, &fmapstr, true);
if (code >= 0) {
int stacksize = pdfi_count_stack(ctx);
if (ctx->main_stream == NULL) {
ctx->main_stream = &fakemainstream;
}
code = pdfi_interpret_content_stream(ctx, fmapstr, &fakedict, NULL);
if (ctx->main_stream == &fakemainstream) {
ctx->main_stream = NULL;
}
if (pdfi_count_stack(ctx) > stacksize && ctx->stack_top[-1]->type == PDF_DICT) {
ctx->pdffontmap = (pdf_dict *)ctx->stack_top[-1];
pdfi_countup(ctx->pdffontmap);
pdfi_pop(ctx, 1);
code = 0;
/* Add our internal aliases to the fontmap. */
for (i = 0; pcfe[i].keyname != NULL; i++) {
pdf_obj *value;
bool k;
/* We don't want to *replace* entries */
if (pdfi_dict_known(ctx, ctx->pdffontmap, pcfe[i].keyname, &k) >= 0
&& k != true) {
code = pdfi_name_alloc(ctx, (byte *)pcfe[i].mappedname, strlen(pcfe[i].mappedname), &value);
if (code < 0)
continue;
pdfi_countup(value);
/* If dict_put throws an error, we just carry on - hence the (void) */
(void)pdfi_dict_put(ctx, ctx->pdffontmap, pcfe[i].keyname, value);
pdfi_countdown(value);
}
}
}
else {
code = gs_note_error(gs_error_syntaxerror);
}
}
gs_free_object(ctx->memory, fmapbuf, "pdf_make_fontmap(fmapbuf)");
return code;
}
int
pdf_fontmap_lookup_font(pdf_context *ctx, pdf_name *fname, pdf_obj **mapname)
{
int code = 0;
pdf_obj *mname;
if (ctx->pdffontmap == NULL) {
code = pdf_make_fontmap(ctx);
if (code < 0) {
return code;
}
}
code = pdfi_dict_get_by_key(ctx, ctx->pdffontmap, fname, &mname);
if (code < 0)
return code;
/* Fontmap can map in multiple "jump" i.e.
name -> substitute name
subsitute name -> file name
So we want to loop until we no more hits.
*/
while(1) {
pdf_obj *mname2;
code = pdfi_dict_get_by_key(ctx, ctx->pdffontmap, (pdf_name *)mname, &mname2);
if (code < 0) break;
pdfi_countdown(mname);
mname = mname2;
}
*mapname = mname;
return 0;
}
|
GitWeb