1 /***************************************************************************/
5 /* FreeType's TrueTypeGX/AAT validation module implementation (body). */
7 /* Copyright 2004, 2005, 2006 */
8 /* by suzuki toshiya, Masatake YAMATO, Red Hat K.K., */
9 /* David Turner, Robert Wilhelm, and Werner Lemberg. */
11 /* This file is part of the FreeType project, and may only be used, */
12 /* modified, and distributed under the terms of the FreeType project */
13 /* license, LICENSE.TXT. By continuing to use, modify, or distribute */
14 /* this file you indicate that you have read the license and */
15 /* understand and accept it fully. */
17 /***************************************************************************/
19 /***************************************************************************/
21 /* gxvalid is derived from both gxlayout module and otvalid module. */
22 /* Development of gxlayout is supported by the Information-technology */
23 /* Promotion Agency(IPA), Japan. */
25 /***************************************************************************/
29 #include FT_TRUETYPE_TABLES_H
30 #include FT_TRUETYPE_TAGS_H
31 #include FT_GX_VALIDATE_H
32 #include FT_INTERNAL_OBJECTS_H
33 #include FT_SERVICE_GX_VALIDATE_H
40 /*************************************************************************/
42 /* The macro FT_COMPONENT is used in trace mode. It is an implicit */
43 /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
44 /* messages during execution. */
47 #define FT_COMPONENT trace_gxvmodule
51 gxv_load_table( FT_Face face,
53 FT_Byte* volatile* table,
57 FT_Memory memory = FT_FACE_MEMORY( face );
60 error = FT_Load_Sfnt_Table( face, tag, 0, NULL, table_len );
61 if ( error == GXV_Err_Table_Missing )
66 if ( FT_ALLOC( *table, *table_len ) )
69 error = FT_Load_Sfnt_Table( face, tag, 0, *table, table_len );
76 #define GXV_TABLE_DECL( _sfnt ) \
77 FT_Byte* volatile _sfnt = NULL; \
78 FT_ULong len_ ## _sfnt = 0
80 #define GXV_TABLE_LOAD( _sfnt ) \
81 if ( ( FT_VALIDATE_ ## _sfnt ## _INDEX < table_count ) && \
82 ( gx_flags & FT_VALIDATE_ ## _sfnt ) ) \
84 error = gxv_load_table( face, TTAG_ ## _sfnt, \
85 &_sfnt, &len_ ## _sfnt ); \
90 #define GXV_TABLE_VALIDATE( _sfnt ) \
93 ft_validator_init( &valid, _sfnt, _sfnt + len_ ## _sfnt, \
94 FT_VALIDATE_DEFAULT ); \
95 if ( ft_setjmp( valid.jump_buffer ) == 0 ) \
96 gxv_ ## _sfnt ## _validate( _sfnt, face, &valid ); \
97 error = valid.error; \
102 #define GXV_TABLE_SET( _sfnt ) \
103 if ( FT_VALIDATE_ ## _sfnt ## _INDEX < table_count ) \
104 tables[FT_VALIDATE_ ## _sfnt ## _INDEX] = (FT_Bytes)_sfnt
108 gxv_validate( FT_Face face,
110 FT_Bytes tables[FT_VALIDATE_GX_LENGTH],
111 FT_UInt table_count )
113 FT_Memory volatile memory = FT_FACE_MEMORY( face );
115 FT_Error error = GXV_Err_Ok;
116 FT_ValidatorRec volatile valid;
121 GXV_TABLE_DECL( feat );
122 GXV_TABLE_DECL( bsln );
123 GXV_TABLE_DECL( trak );
124 GXV_TABLE_DECL( just );
125 GXV_TABLE_DECL( mort );
126 GXV_TABLE_DECL( morx );
127 GXV_TABLE_DECL( kern );
128 GXV_TABLE_DECL( opbd );
129 GXV_TABLE_DECL( prop );
130 GXV_TABLE_DECL( lcar );
132 for ( i = 0; i < table_count; i++ )
136 GXV_TABLE_LOAD( feat );
137 GXV_TABLE_LOAD( bsln );
138 GXV_TABLE_LOAD( trak );
139 GXV_TABLE_LOAD( just );
140 GXV_TABLE_LOAD( mort );
141 GXV_TABLE_LOAD( morx );
142 GXV_TABLE_LOAD( kern );
143 GXV_TABLE_LOAD( opbd );
144 GXV_TABLE_LOAD( prop );
145 GXV_TABLE_LOAD( lcar );
147 /* validate tables */
148 GXV_TABLE_VALIDATE( feat );
149 GXV_TABLE_VALIDATE( bsln );
150 GXV_TABLE_VALIDATE( trak );
151 GXV_TABLE_VALIDATE( just );
152 GXV_TABLE_VALIDATE( mort );
153 GXV_TABLE_VALIDATE( morx );
154 GXV_TABLE_VALIDATE( kern );
155 GXV_TABLE_VALIDATE( opbd );
156 GXV_TABLE_VALIDATE( prop );
157 GXV_TABLE_VALIDATE( lcar );
160 GXV_TABLE_SET( feat );
161 GXV_TABLE_SET( mort );
162 GXV_TABLE_SET( morx );
163 GXV_TABLE_SET( bsln );
164 GXV_TABLE_SET( just );
165 GXV_TABLE_SET( kern );
166 GXV_TABLE_SET( opbd );
167 GXV_TABLE_SET( trak );
168 GXV_TABLE_SET( prop );
169 GXV_TABLE_SET( lcar );
191 classic_kern_validate( FT_Face face,
193 FT_Bytes* ckern_table )
195 FT_Memory volatile memory = FT_FACE_MEMORY( face );
197 FT_Byte* volatile ckern = NULL;
198 FT_ULong len_ckern = 0;
200 /* without volatile on `error' GCC 4.1.1. emits: */
201 /* warning: variable 'error' might be clobbered by 'longjmp' or 'vfork' */
202 /* this warning seems spurious but --- */
203 FT_Error volatile error = GXV_Err_Ok;
204 FT_ValidatorRec volatile valid;
209 error = gxv_load_table( face, TTAG_kern, &ckern, &len_ckern );
215 ft_validator_init( &valid, ckern, ckern + len_ckern,
216 FT_VALIDATE_DEFAULT );
217 if ( ft_setjmp( valid.jump_buffer ) == 0 )
218 gxv_kern_validate_classic( ckern, face,
219 ckern_flags & FT_VALIDATE_CKERN, &valid );
225 *ckern_table = ckern;
236 const FT_Service_GXvalidateRec gxvalid_interface =
243 const FT_Service_CKERNvalidateRec ckernvalid_interface =
245 classic_kern_validate
250 const FT_ServiceDescRec gxvalid_services[] =
252 { FT_SERVICE_ID_GX_VALIDATE, &gxvalid_interface },
253 { FT_SERVICE_ID_CLASSICKERN_VALIDATE, &ckernvalid_interface },
259 gxvalid_get_service( FT_Module module,
260 const char* service_id )
264 return ft_service_list_lookup( gxvalid_services, service_id );
268 FT_CALLBACK_TABLE_DEF
269 const FT_Module_Class gxv_module_class =
272 sizeof ( FT_ModuleRec ),
277 0, /* module-specific interface */
279 (FT_Module_Constructor)0,
280 (FT_Module_Destructor) 0,
281 (FT_Module_Requester) gxvalid_get_service