|
54876
|
1 |
/****************************************************************************
|
|
|
2 |
*
|
|
|
3 |
* ftinit.c
|
|
|
4 |
*
|
|
|
5 |
* FreeType initialization layer (body).
|
|
|
6 |
*
|
|
|
7 |
* Copyright (C) 1996-2019 by
|
|
|
8 |
* David Turner, Robert Wilhelm, and Werner Lemberg.
|
|
|
9 |
*
|
|
|
10 |
* This file is part of the FreeType project, and may only be used,
|
|
|
11 |
* modified, and distributed under the terms of the FreeType project
|
|
|
12 |
* license, LICENSE.TXT. By continuing to use, modify, or distribute
|
|
|
13 |
* this file you indicate that you have read the license and
|
|
|
14 |
* understand and accept it fully.
|
|
|
15 |
*
|
|
|
16 |
*/
|
|
49234
|
17 |
|
|
54876
|
18 |
/**************************************************************************
|
|
|
19 |
*
|
|
|
20 |
* The purpose of this file is to implement the following two
|
|
|
21 |
* functions:
|
|
|
22 |
*
|
|
|
23 |
* FT_Add_Default_Modules():
|
|
|
24 |
* This function is used to add the set of default modules to a
|
|
|
25 |
* fresh new library object. The set is taken from the header file
|
|
|
26 |
* `freetype/config/ftmodule.h'. See the document `FreeType 2.0
|
|
|
27 |
* Build System' for more information.
|
|
|
28 |
*
|
|
|
29 |
* FT_Init_FreeType():
|
|
|
30 |
* This function creates a system object for the current platform,
|
|
|
31 |
* builds a library out of it, then calls FT_Default_Drivers().
|
|
|
32 |
*
|
|
|
33 |
* Note that even if FT_Init_FreeType() uses the implementation of the
|
|
|
34 |
* system object defined at build time, client applications are still
|
|
|
35 |
* able to provide their own `ftsystem.c'.
|
|
|
36 |
*
|
|
|
37 |
*/
|
|
49234
|
38 |
|
|
|
39 |
|
|
|
40 |
#include <ft2build.h>
|
|
|
41 |
#include FT_CONFIG_CONFIG_H
|
|
|
42 |
#include FT_INTERNAL_OBJECTS_H
|
|
|
43 |
#include FT_INTERNAL_DEBUG_H
|
|
|
44 |
#include FT_MODULE_H
|
|
|
45 |
|
|
|
46 |
|
|
54876
|
47 |
/**************************************************************************
|
|
|
48 |
*
|
|
|
49 |
* The macro FT_COMPONENT is used in trace mode. It is an implicit
|
|
|
50 |
* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log
|
|
|
51 |
* messages during execution.
|
|
|
52 |
*/
|
|
49234
|
53 |
#undef FT_COMPONENT
|
|
54876
|
54 |
#define FT_COMPONENT init
|
|
49234
|
55 |
|
|
|
56 |
|
|
|
57 |
#undef FT_USE_MODULE
|
|
|
58 |
#ifdef __cplusplus
|
|
|
59 |
#define FT_USE_MODULE( type, x ) extern "C" const type x;
|
|
|
60 |
#else
|
|
|
61 |
#define FT_USE_MODULE( type, x ) extern const type x;
|
|
|
62 |
#endif
|
|
|
63 |
|
|
|
64 |
#include FT_CONFIG_MODULES_H
|
|
|
65 |
|
|
|
66 |
#undef FT_USE_MODULE
|
|
|
67 |
#define FT_USE_MODULE( type, x ) (const FT_Module_Class*)&(x),
|
|
|
68 |
|
|
|
69 |
static
|
|
|
70 |
const FT_Module_Class* const ft_default_modules[] =
|
|
|
71 |
{
|
|
|
72 |
#include FT_CONFIG_MODULES_H
|
|
|
73 |
0
|
|
|
74 |
};
|
|
|
75 |
|
|
|
76 |
|
|
|
77 |
/* documentation is in ftmodapi.h */
|
|
|
78 |
|
|
|
79 |
FT_EXPORT_DEF( void )
|
|
|
80 |
FT_Add_Default_Modules( FT_Library library )
|
|
|
81 |
{
|
|
|
82 |
FT_Error error;
|
|
|
83 |
const FT_Module_Class* const* cur;
|
|
|
84 |
|
|
|
85 |
|
|
|
86 |
/* GCC 4.6 warns the type difference:
|
|
|
87 |
* FT_Module_Class** != const FT_Module_Class* const*
|
|
|
88 |
*/
|
|
54876
|
89 |
cur = (const FT_Module_Class* const*)ft_default_modules;
|
|
49234
|
90 |
|
|
|
91 |
/* test for valid `library' delayed to FT_Add_Module() */
|
|
|
92 |
while ( *cur )
|
|
|
93 |
{
|
|
|
94 |
error = FT_Add_Module( library, *cur );
|
|
|
95 |
/* notify errors, but don't stop */
|
|
|
96 |
if ( error )
|
|
|
97 |
FT_TRACE0(( "FT_Add_Default_Module:"
|
|
|
98 |
" Cannot install `%s', error = 0x%x\n",
|
|
|
99 |
(*cur)->module_name, error ));
|
|
|
100 |
cur++;
|
|
|
101 |
}
|
|
|
102 |
}
|
|
|
103 |
|
|
|
104 |
|
|
|
105 |
#ifdef FT_CONFIG_OPTION_ENVIRONMENT_PROPERTIES
|
|
|
106 |
|
|
|
107 |
#define MAX_LENGTH 128
|
|
|
108 |
|
|
|
109 |
/* documentation is in ftmodapi.h */
|
|
|
110 |
|
|
|
111 |
FT_EXPORT_DEF( void )
|
|
|
112 |
FT_Set_Default_Properties( FT_Library library )
|
|
|
113 |
{
|
|
|
114 |
const char* env;
|
|
|
115 |
const char* p;
|
|
|
116 |
const char* q;
|
|
|
117 |
|
|
|
118 |
char module_name[MAX_LENGTH + 1];
|
|
|
119 |
char property_name[MAX_LENGTH + 1];
|
|
|
120 |
char property_value[MAX_LENGTH + 1];
|
|
|
121 |
|
|
|
122 |
int i;
|
|
|
123 |
|
|
|
124 |
|
|
|
125 |
env = ft_getenv( "FREETYPE_PROPERTIES" );
|
|
|
126 |
if ( !env )
|
|
|
127 |
return;
|
|
|
128 |
|
|
|
129 |
for ( p = env; *p; p++ )
|
|
|
130 |
{
|
|
|
131 |
/* skip leading whitespace and separators */
|
|
|
132 |
if ( *p == ' ' || *p == '\t' )
|
|
|
133 |
continue;
|
|
|
134 |
|
|
|
135 |
/* read module name, followed by `:' */
|
|
|
136 |
q = p;
|
|
|
137 |
for ( i = 0; i < MAX_LENGTH; i++ )
|
|
|
138 |
{
|
|
|
139 |
if ( !*p || *p == ':' )
|
|
|
140 |
break;
|
|
|
141 |
module_name[i] = *p++;
|
|
|
142 |
}
|
|
|
143 |
module_name[i] = '\0';
|
|
|
144 |
|
|
|
145 |
if ( !*p || *p != ':' || p == q )
|
|
|
146 |
break;
|
|
|
147 |
|
|
|
148 |
/* read property name, followed by `=' */
|
|
|
149 |
q = ++p;
|
|
|
150 |
for ( i = 0; i < MAX_LENGTH; i++ )
|
|
|
151 |
{
|
|
|
152 |
if ( !*p || *p == '=' )
|
|
|
153 |
break;
|
|
|
154 |
property_name[i] = *p++;
|
|
|
155 |
}
|
|
|
156 |
property_name[i] = '\0';
|
|
|
157 |
|
|
|
158 |
if ( !*p || *p != '=' || p == q )
|
|
|
159 |
break;
|
|
|
160 |
|
|
|
161 |
/* read property value, followed by whitespace (if any) */
|
|
|
162 |
q = ++p;
|
|
|
163 |
for ( i = 0; i < MAX_LENGTH; i++ )
|
|
|
164 |
{
|
|
|
165 |
if ( !*p || *p == ' ' || *p == '\t' )
|
|
|
166 |
break;
|
|
|
167 |
property_value[i] = *p++;
|
|
|
168 |
}
|
|
|
169 |
property_value[i] = '\0';
|
|
|
170 |
|
|
|
171 |
if ( !( *p == '\0' || *p == ' ' || *p == '\t' ) || p == q )
|
|
|
172 |
break;
|
|
|
173 |
|
|
|
174 |
/* we completely ignore errors */
|
|
|
175 |
ft_property_string_set( library,
|
|
|
176 |
module_name,
|
|
|
177 |
property_name,
|
|
|
178 |
property_value );
|
|
|
179 |
}
|
|
|
180 |
}
|
|
|
181 |
|
|
|
182 |
#else
|
|
|
183 |
|
|
|
184 |
FT_EXPORT_DEF( void )
|
|
|
185 |
FT_Set_Default_Properties( FT_Library library )
|
|
|
186 |
{
|
|
|
187 |
FT_UNUSED( library );
|
|
|
188 |
}
|
|
|
189 |
|
|
|
190 |
#endif
|
|
|
191 |
|
|
|
192 |
|
|
|
193 |
/* documentation is in freetype.h */
|
|
|
194 |
|
|
|
195 |
FT_EXPORT_DEF( FT_Error )
|
|
|
196 |
FT_Init_FreeType( FT_Library *alibrary )
|
|
|
197 |
{
|
|
|
198 |
FT_Error error;
|
|
|
199 |
FT_Memory memory;
|
|
|
200 |
|
|
|
201 |
|
|
|
202 |
/* check of `alibrary' delayed to `FT_New_Library' */
|
|
|
203 |
|
|
|
204 |
/* First of all, allocate a new system object -- this function is part */
|
|
|
205 |
/* of the system-specific component, i.e. `ftsystem.c'. */
|
|
|
206 |
|
|
|
207 |
memory = FT_New_Memory();
|
|
|
208 |
if ( !memory )
|
|
|
209 |
{
|
|
|
210 |
FT_ERROR(( "FT_Init_FreeType: cannot find memory manager\n" ));
|
|
|
211 |
return FT_THROW( Unimplemented_Feature );
|
|
|
212 |
}
|
|
|
213 |
|
|
|
214 |
/* build a library out of it, then fill it with the set of */
|
|
|
215 |
/* default drivers. */
|
|
|
216 |
|
|
|
217 |
error = FT_New_Library( memory, alibrary );
|
|
|
218 |
if ( error )
|
|
|
219 |
FT_Done_Memory( memory );
|
|
|
220 |
else
|
|
|
221 |
FT_Add_Default_Modules( *alibrary );
|
|
|
222 |
|
|
|
223 |
FT_Set_Default_Properties( *alibrary );
|
|
|
224 |
|
|
|
225 |
return error;
|
|
|
226 |
}
|
|
|
227 |
|
|
|
228 |
|
|
|
229 |
/* documentation is in freetype.h */
|
|
|
230 |
|
|
|
231 |
FT_EXPORT_DEF( FT_Error )
|
|
|
232 |
FT_Done_FreeType( FT_Library library )
|
|
|
233 |
{
|
|
|
234 |
FT_Memory memory;
|
|
|
235 |
|
|
|
236 |
|
|
|
237 |
if ( !library )
|
|
|
238 |
return FT_THROW( Invalid_Library_Handle );
|
|
|
239 |
|
|
|
240 |
memory = library->memory;
|
|
|
241 |
|
|
|
242 |
/* Discard the library object */
|
|
|
243 |
FT_Done_Library( library );
|
|
|
244 |
|
|
|
245 |
/* discard memory manager */
|
|
|
246 |
FT_Done_Memory( memory );
|
|
|
247 |
|
|
|
248 |
return FT_Err_Ok;
|
|
|
249 |
}
|
|
|
250 |
|
|
|
251 |
|
|
|
252 |
/* END */
|