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
|
/****************************************************************************
*
* ftinit.c
*
* FreeType initialization layer (body).
*
* Copyright (C) 1996-2019 by
* David Turner, Robert Wilhelm, and Werner Lemberg.
*
* This file is part of the FreeType project, and may only be used,
* modified, and distributed under the terms of the FreeType project
* license, LICENSE.TXT. By continuing to use, modify, or distribute
* this file you indicate that you have read the license and
* understand and accept it fully.
*
*/
/**************************************************************************
*
* The purpose of this file is to implement the following two
* functions:
*
* FT_Add_Default_Modules():
* This function is used to add the set of default modules to a
* fresh new library object. The set is taken from the header file
* `freetype/config/ftmodule.h'. See the document `FreeType 2.0
* Build System' for more information.
*
* FT_Init_FreeType():
* This function creates a system object for the current platform,
* builds a library out of it, then calls FT_Default_Drivers().
*
* Note that even if FT_Init_FreeType() uses the implementation of the
* system object defined at build time, client applications are still
* able to provide their own `ftsystem.c'.
*
*/
#include <ft2build.h>
#include FT_CONFIG_CONFIG_H
#include FT_INTERNAL_OBJECTS_H
#include FT_INTERNAL_DEBUG_H
#include FT_MODULE_H
/**************************************************************************
*
* The macro FT_COMPONENT is used in trace mode. It is an implicit
* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log
* messages during execution.
*/
#undef FT_COMPONENT
#define FT_COMPONENT init
#undef FT_USE_MODULE
#ifdef __cplusplus
#define FT_USE_MODULE( type, x ) extern "C" const type x;
#else
#define FT_USE_MODULE( type, x ) extern const type x;
#endif
#include FT_CONFIG_MODULES_H
#undef FT_USE_MODULE
#define FT_USE_MODULE( type, x ) (const FT_Module_Class*)&(x),
static
const FT_Module_Class* const ft_default_modules[] =
{
#include FT_CONFIG_MODULES_H
0
};
/* documentation is in ftmodapi.h */
FT_EXPORT_DEF( void )
FT_Add_Default_Modules( FT_Library library )
{
FT_Error error;
const FT_Module_Class* const* cur;
/* GCC 4.6 warns the type difference:
* FT_Module_Class** != const FT_Module_Class* const*
*/
cur = (const FT_Module_Class* const*)ft_default_modules;
/* test for valid `library' delayed to FT_Add_Module() */
while ( *cur )
{
error = FT_Add_Module( library, *cur );
/* notify errors, but don't stop */
if ( error )
FT_TRACE0(( "FT_Add_Default_Module:"
" Cannot install `%s', error = 0x%x\n",
(*cur)->module_name, error ));
cur++;
}
}
#ifdef FT_CONFIG_OPTION_ENVIRONMENT_PROPERTIES
#define MAX_LENGTH 128
/* documentation is in ftmodapi.h */
FT_EXPORT_DEF( void )
FT_Set_Default_Properties( FT_Library library )
{
const char* env;
const char* p;
const char* q;
char module_name[MAX_LENGTH + 1];
char property_name[MAX_LENGTH + 1];
char property_value[MAX_LENGTH + 1];
int i;
env = ft_getenv( "FREETYPE_PROPERTIES" );
if ( !env )
return;
for ( p = env; *p; p++ )
{
/* skip leading whitespace and separators */
if ( *p == ' ' || *p == '\t' )
continue;
/* read module name, followed by `:' */
q = p;
for ( i = 0; i < MAX_LENGTH; i++ )
{
if ( !*p || *p == ':' )
break;
module_name[i] = *p++;
}
module_name[i] = '\0';
if ( !*p || *p != ':' || p == q )
break;
/* read property name, followed by `=' */
q = ++p;
for ( i = 0; i < MAX_LENGTH; i++ )
{
if ( !*p || *p == '=' )
break;
property_name[i] = *p++;
}
property_name[i] = '\0';
if ( !*p || *p != '=' || p == q )
break;
/* read property value, followed by whitespace (if any) */
q = ++p;
for ( i = 0; i < MAX_LENGTH; i++ )
{
if ( !*p || *p == ' ' || *p == '\t' )
break;
property_value[i] = *p++;
}
property_value[i] = '\0';
if ( !( *p == '\0' || *p == ' ' || *p == '\t' ) || p == q )
break;
/* we completely ignore errors */
ft_property_string_set( library,
module_name,
property_name,
property_value );
if ( !*p )
break;
}
}
#else
FT_EXPORT_DEF( void )
FT_Set_Default_Properties( FT_Library library )
{
FT_UNUSED( library );
}
#endif
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_Error )
FT_Init_FreeType( FT_Library *alibrary )
{
FT_Error error;
FT_Memory memory;
/* check of `alibrary' delayed to `FT_New_Library' */
/* First of all, allocate a new system object -- this function is part */
/* of the system-specific component, i.e. `ftsystem.c'. */
memory = FT_New_Memory();
if ( !memory )
{
FT_ERROR(( "FT_Init_FreeType: cannot find memory manager\n" ));
return FT_THROW( Unimplemented_Feature );
}
/* build a library out of it, then fill it with the set of */
/* default drivers. */
error = FT_New_Library( memory, alibrary );
if ( error )
FT_Done_Memory( memory );
else
FT_Add_Default_Modules( *alibrary );
FT_Set_Default_Properties( *alibrary );
return error;
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_Error )
FT_Done_FreeType( FT_Library library )
{
FT_Memory memory;
if ( !library )
return FT_THROW( Invalid_Library_Handle );
memory = library->memory;
/* Discard the library object */
FT_Done_Library( library );
/* discard memory manager */
FT_Done_Memory( memory );
return FT_Err_Ok;
}
/* END */
|
