kc3-lang/freetype/src/base/ftextend.c
-
Show log
Commit
-
Hash : e35cac66
Author :
Date : 2000-06-11T03:46:57
A complete revision of FreeType 2's GNU makefiles (of the library): Tons of unnecessary stuff have been removed; only the essential rules have been retained. The source files now depend on all header files in include/freetype, include/freetype/config, and include/freetype/internal. This is not optimal, I know, and I'll try to improve this, but it is better than before (namely no dependencies on `internal'). FTDEBUG_SRC has been added (similar to FTSYS_SRC) -- I don't know exactly whether this is really useful, but it doesn't harm. There is now more documentation in the makefiles itself. io-frames.html: Use of <th>, <code>, and <var> for better tagging. Reactivating of FT_DEBUG_LEVEL_xxx macros. Added a lot of #include directives to make `multi' builds possible -- note that currently the modules cid, t1, and t1z have clashing structures and functions which means that you can only use one of these three modules for a multi build. Added some missing function declarations to (local) header files. Renamed some T1_Open_Face() to CID_Open_Face() in the cid module -- a lot of other functions should be renamed also... Replaced many FT_xxx stuff with T1_xxx in t1z driver -- this isn't finished yet... Fixed FT_Free() to allow a NULL pointer without an assertion (this has always been a valid assumption in FreeType, at least in FT 1.x). A lot of other, minor fixes (mostly documentation).
-
src/base/ftextend.c
-
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331
/***************************************************************************/ /* */ /* ftextend.h */ /* */ /* FreeType extensions implementation (body). */ /* */ /* Copyright 1996-2000 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. */ /* */ /***************************************************************************/ /*************************************************************************/ /* */ /* This is an updated version of the extension component, now located */ /* in the main library's source directory. It allows the dynamic */ /* registration/use of various face object extensions through a simple */ /* API. */ /* */ /*************************************************************************/ #include <freetype/internal/ftextend.h> #include <freetype/internal/ftdebug.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 trace_extend typedef struct FT_Extension_Registry_ { FT_Int num_extensions; FT_Long cur_offset; FT_Extension_Class classes[FT_MAX_EXTENSIONS]; } FT_Extension_Registry; /*************************************************************************/ /* */ /* <Function> */ /* FT_Init_Extensions */ /* */ /* <Description> */ /* Initializes the extension component. */ /* */ /* <InOut> */ /* driver :: A handle to the driver object. */ /* */ /* <Return> */ /* FreeType error code. 0 means success. */ /* */ LOCAL_FUNC FT_Error FT_Init_Extensions( FT_Driver driver ) { FT_Error error; FT_Memory memory; FT_Extension_Registry* registry; memory = driver->library->memory; if ( ALLOC( registry, sizeof ( *registry ) ) ) return error; registry->num_extensions = 0; registry->cur_offset = 0; driver->extensions = registry; FT_TRACE2(( "FT_Init_Extensions: success\n" )); return FT_Err_Ok; } /*************************************************************************/ /* */ /* <Function> */ /* FT_Done_Extensions */ /* */ /* <Description> */ /* Finalizes the extension component. */ /* */ /* <InOut> */ /* driver :: A handle to the driver object. */ /* */ /* <Return> */ /* FreeType error code. 0 means success. */ /* */ LOCAL_FUNC FT_Error FT_Done_Extensions( FT_Driver driver ) { FT_Memory memory = driver->memory; FREE( driver->extensions ); return FT_Err_Ok; } /*************************************************************************/ /* */ /* <Function> */ /* FT_Register_Extension */ /* */ /* <Description> */ /* Registers a new extension. */ /* */ /* <InOut> */ /* driver :: A handle to the driver object. */ /* class :: A pointer to a class describing the extension. */ /* */ /* <Return> */ /* FreeType error code. 0 means success. */ /* */ FT_EXPORT_FUNC( FT_Error ) FT_Register_Extension( FT_Driver driver, FT_Extension_Class* class ) { FT_Extension_Registry* registry; if ( !driver ) return FT_Err_Invalid_Driver_Handle; if ( !class ) return FT_Err_Invalid_Argument; registry = (FT_Extension_Registry*)driver->extensions; if ( registry ) { FT_Int n = registry->num_extensions; FT_Extension_Class* cur = registry->classes + n; if ( n >= FT_MAX_EXTENSIONS ) return FT_Err_Too_Many_Extensions; *cur = *class; cur->offset = registry->cur_offset; registry->num_extensions++; registry->cur_offset += ( cur->size + FT_ALIGNMENT-1 ) & -FT_ALIGNMENT; FT_TRACE1(( "FT_Register_Extension: `%s' successfully registered\n", cur->id )); } return FT_Err_Ok; } /*************************************************************************/ /* */ /* <Function> */ /* FT_Get_Extension */ /* */ /* <Description> */ /* Queries an extension block by an extension ID string. */ /* */ /* <Input> */ /* face :: A handle to the face object. */ /* extension_id :: An ID string identifying the extension. */ /* */ /* <Output> */ /* extension_interface :: A generic pointer, usually pointing to a */ /* table of functions implementing the */ /* extension interface. */ /* */ /* <Return> */ /* A pointer to the extension block. */ /* */ FT_EXPORT_FUNC( void* ) FT_Get_Extension( FT_Face face, const char* extension_id, void* *extension_interface ) { FT_Extension_Registry* registry; if ( !face || !extension_id || !extension_interface ) return 0; registry = (FT_Extension_Registry*)face->driver->extensions; if ( registry && face->extensions ) { FT_Extension_Class* cur = registry->classes; FT_Extension_Class* limit = cur + registry->num_extensions; for ( ; cur < limit; cur++ ) if ( strcmp( cur->id, extension_id ) == 0 ) { *extension_interface = cur->interface; FT_TRACE1(( "FT_Get_Extension: got `%s'\n", extension_id )); return (void*)((char*)face->extensions + cur->offset); } } /* could not find the extension id */ FT_ERROR(( "FT_Get_Extension: couldn't find `%s'\n", extension_id )); *extension_interface = 0; return 0; } /*************************************************************************/ /* */ /* <Function> */ /* FT_Destroy_Extensions */ /* */ /* <Description> */ /* Destroys all extensions within a face object. */ /* */ /* <InOut> */ /* face :: A handle to the face object. */ /* */ /* <Return> */ /* FreeType error code. 0 means success. */ /* */ /* <Note> */ /* Called by the face object destructor. */ /* */ LOCAL_FUNC FT_Error FT_Destroy_Extensions( FT_Face face ) { FT_Extension_Registry* registry; FT_Memory memory; registry = (FT_Extension_Registry*)face->driver->extensions; if ( registry && face->extensions ) { FT_Extension_Class* cur = registry->classes; FT_Extension_Class* limit = cur + registry->num_extensions; for ( ; cur < limit; cur++ ) { char* ext = (char*)face->extensions + cur->offset; if ( cur->finalize ) cur->finalize( ext, face ); } memory = face->driver->memory; FREE( face->extensions ); } return FT_Err_Ok; } /*************************************************************************/ /* */ /* <Function> */ /* FT_Create_Extensions */ /* */ /* <Description> */ /* Creates an extension object within a face object for all */ /* registered extensions. */ /* */ /* <InOut> */ /* face :: A handle to the face object. */ /* */ /* <Return> */ /* FreeType error code. 0 means success. */ /* */ /* <Note> */ /* Called by the face object constructor. */ /* */ LOCAL_FUNC FT_Error FT_Create_Extensions( FT_Face face ) { FT_Extension_Registry* registry; FT_Memory memory; FT_Error error; face->extensions = 0; /* load extensions registry, exit successfully if none is there */ registry = (FT_Extension_Registry*)face->driver->extensions; if ( !registry ) return FT_Err_Ok; memory = face->driver->memory; if ( ALLOC( face->extensions, registry->cur_offset ) ) return error; { FT_Extension_Class* cur = registry->classes; FT_Extension_Class* limit = cur + registry->num_extensions; for ( ; cur < limit; cur++ ) { char* ext = (char*)face->extensions + cur->offset; if ( cur->init ) { error = cur->init( ext, face ); if ( error ) break; } } } return error; } /* END */