1 /***************************************************************************/ 2 /* */ 3 /* fttypes.h */ 4 /* */ 5 /* FreeType simple types definitions (specification only). */ 6 /* */ 7 /* Copyright 1996-2001, 2002, 2004, 2006, 2007, 2008 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 /***************************************************************************/ 17 18 19 #ifndef __FTTYPES_H__ 20 #define __FTTYPES_H__ 21 22 23 #include <ft2build.h> 24 #include FT_CONFIG_CONFIG_H 25 #include FT_SYSTEM_H 26 #include FT_IMAGE_H 27 28 #include <stddef.h> 29 30 31 FT_BEGIN_HEADER 32 33 34 /*************************************************************************/ 35 /* */ 36 /* <Section> */ 37 /* basic_types */ 38 /* */ 39 /* <Title> */ 40 /* Basic Data Types */ 41 /* */ 42 /* <Abstract> */ 43 /* The basic data types defined by the library. */ 44 /* */ 45 /* <Description> */ 46 /* This section contains the basic data types defined by FreeType~2, */ 47 /* ranging from simple scalar types to bitmap descriptors. More */ 48 /* font-specific structures are defined in a different section. */ 49 /* */ 50 /* <Order> */ 51 /* FT_Byte */ 52 /* FT_Bytes */ 53 /* FT_Char */ 54 /* FT_Int */ 55 /* FT_UInt */ 56 /* FT_Int16 */ 57 /* FT_UInt16 */ 58 /* FT_Int32 */ 59 /* FT_UInt32 */ 60 /* FT_Short */ 61 /* FT_UShort */ 62 /* FT_Long */ 63 /* FT_ULong */ 64 /* FT_Bool */ 65 /* FT_Offset */ 66 /* FT_PtrDist */ 67 /* FT_String */ 68 /* FT_Tag */ 69 /* FT_Error */ 70 /* FT_Fixed */ 71 /* FT_Pointer */ 72 /* FT_Pos */ 73 /* FT_Vector */ 74 /* FT_BBox */ 75 /* FT_Matrix */ 76 /* FT_FWord */ 77 /* FT_UFWord */ 78 /* FT_F2Dot14 */ 79 /* FT_UnitVector */ 80 /* FT_F26Dot6 */ 81 /* */ 82 /* */ 83 /* FT_Generic */ 84 /* FT_Generic_Finalizer */ 85 /* */ 86 /* FT_Bitmap */ 87 /* FT_Pixel_Mode */ 88 /* FT_Palette_Mode */ 89 /* FT_Glyph_Format */ 90 /* FT_IMAGE_TAG */ 91 /* */ 92 /*************************************************************************/ 93 94 95 /*************************************************************************/ 96 /* */ 97 /* <Type> */ 98 /* FT_Bool */ 99 /* */ 100 /* <Description> */ 101 /* A typedef of unsigned char, used for simple booleans. As usual, */ 102 /* values 1 and~0 represent true and false, respectively. */ 103 /* */ 104 typedef unsigned char FT_Bool; 105 106 107 /*************************************************************************/ 108 /* */ 109 /* <Type> */ 110 /* FT_FWord */ 111 /* */ 112 /* <Description> */ 113 /* A signed 16-bit integer used to store a distance in original font */ 114 /* units. */ 115 /* */ 116 typedef signed short FT_FWord; /* distance in FUnits */ 117 118 119 /*************************************************************************/ 120 /* */ 121 /* <Type> */ 122 /* FT_UFWord */ 123 /* */ 124 /* <Description> */ 125 /* An unsigned 16-bit integer used to store a distance in original */ 126 /* font units. */ 127 /* */ 128 typedef unsigned short FT_UFWord; /* unsigned distance */ 129 130 131 /*************************************************************************/ 132 /* */ 133 /* <Type> */ 134 /* FT_Char */ 135 /* */ 136 /* <Description> */ 137 /* A simple typedef for the _signed_ char type. */ 138 /* */ 139 typedef signed char FT_Char; 140 141 142 /*************************************************************************/ 143 /* */ 144 /* <Type> */ 145 /* FT_Byte */ 146 /* */ 147 /* <Description> */ 148 /* A simple typedef for the _unsigned_ char type. */ 149 /* */ 150 typedef unsigned char FT_Byte; 151 152 153 /*************************************************************************/ 154 /* */ 155 /* <Type> */ 156 /* FT_Bytes */ 157 /* */ 158 /* <Description> */ 159 /* A typedef for constant memory areas. */ 160 /* */ 161 typedef const FT_Byte* FT_Bytes; 162 163 164 /*************************************************************************/ 165 /* */ 166 /* <Type> */ 167 /* FT_Tag */ 168 /* */ 169 /* <Description> */ 170 /* A typedef for 32-bit tags (as used in the SFNT format). */ 171 /* */ 172 typedef FT_UInt32 FT_Tag; 173 174 175 /*************************************************************************/ 176 /* */ 177 /* <Type> */ 178 /* FT_String */ 179 /* */ 180 /* <Description> */ 181 /* A simple typedef for the char type, usually used for strings. */ 182 /* */ 183 typedef char FT_String; 184 185 186 /*************************************************************************/ 187 /* */ 188 /* <Type> */ 189 /* FT_Short */ 190 /* */ 191 /* <Description> */ 192 /* A typedef for signed short. */ 193 /* */ 194 typedef signed short FT_Short; 195 196 197 /*************************************************************************/ 198 /* */ 199 /* <Type> */ 200 /* FT_UShort */ 201 /* */ 202 /* <Description> */ 203 /* A typedef for unsigned short. */ 204 /* */ 205 typedef unsigned short FT_UShort; 206 207 208 /*************************************************************************/ 209 /* */ 210 /* <Type> */ 211 /* FT_Int */ 212 /* */ 213 /* <Description> */ 214 /* A typedef for the int type. */ 215 /* */ 216 typedef signed int FT_Int; 217 218 219 /*************************************************************************/ 220 /* */ 221 /* <Type> */ 222 /* FT_UInt */ 223 /* */ 224 /* <Description> */ 225 /* A typedef for the unsigned int type. */ 226 /* */ 227 typedef unsigned int FT_UInt; 228 229 230 /*************************************************************************/ 231 /* */ 232 /* <Type> */ 233 /* FT_Long */ 234 /* */ 235 /* <Description> */ 236 /* A typedef for signed long. */ 237 /* */ 238 typedef signed long FT_Long; 239 240 241 /*************************************************************************/ 242 /* */ 243 /* <Type> */ 244 /* FT_ULong */ 245 /* */ 246 /* <Description> */ 247 /* A typedef for unsigned long. */ 248 /* */ 249 typedef unsigned long FT_ULong; 250 251 252 /*************************************************************************/ 253 /* */ 254 /* <Type> */ 255 /* FT_F2Dot14 */ 256 /* */ 257 /* <Description> */ 258 /* A signed 2.14 fixed float type used for unit vectors. */ 259 /* */ 260 typedef signed short FT_F2Dot14; 261 262 263 /*************************************************************************/ 264 /* */ 265 /* <Type> */ 266 /* FT_F26Dot6 */ 267 /* */ 268 /* <Description> */ 269 /* A signed 26.6 fixed float type used for vectorial pixel */ 270 /* coordinates. */ 271 /* */ 272 typedef signed long FT_F26Dot6; 273 274 275 /*************************************************************************/ 276 /* */ 277 /* <Type> */ 278 /* FT_Fixed */ 279 /* */ 280 /* <Description> */ 281 /* This type is used to store 16.16 fixed float values, like scaling */ 282 /* values or matrix coefficients. */ 283 /* */ 284 typedef signed long FT_Fixed; 285 286 287 /*************************************************************************/ 288 /* */ 289 /* <Type> */ 290 /* FT_Error */ 291 /* */ 292 /* <Description> */ 293 /* The FreeType error code type. A value of~0 is always interpreted */ 294 /* as a successful operation. */ 295 /* */ 296 typedef int FT_Error; 297 298 299 /*************************************************************************/ 300 /* */ 301 /* <Type> */ 302 /* FT_Pointer */ 303 /* */ 304 /* <Description> */ 305 /* A simple typedef for a typeless pointer. */ 306 /* */ 307 typedef void* FT_Pointer; 308 309 310 /*************************************************************************/ 311 /* */ 312 /* <Type> */ 313 /* FT_Offset */ 314 /* */ 315 /* <Description> */ 316 /* This is equivalent to the ANSI~C `size_t' type, i.e., the largest */ 317 /* _unsigned_ integer type used to express a file size or position, */ 318 /* or a memory block size. */ 319 /* */ 320 typedef size_t FT_Offset; 321 322 323 /*************************************************************************/ 324 /* */ 325 /* <Type> */ 326 /* FT_PtrDist */ 327 /* */ 328 /* <Description> */ 329 /* This is equivalent to the ANSI~C `ptrdiff_t' type, i.e., the */ 330 /* largest _signed_ integer type used to express the distance */ 331 /* between two pointers. */ 332 /* */ 333 typedef ft_ptrdiff_t FT_PtrDist; 334 335 336 /*************************************************************************/ 337 /* */ 338 /* <Struct> */ 339 /* FT_UnitVector */ 340 /* */ 341 /* <Description> */ 342 /* A simple structure used to store a 2D vector unit vector. Uses */ 343 /* FT_F2Dot14 types. */ 344 /* */ 345 /* <Fields> */ 346 /* x :: Horizontal coordinate. */ 347 /* */ 348 /* y :: Vertical coordinate. */ 349 /* */ 350 typedef struct FT_UnitVector_ 351 { 352 FT_F2Dot14 x; 353 FT_F2Dot14 y; 354 355 } FT_UnitVector; 356 357 358 /*************************************************************************/ 359 /* */ 360 /* <Struct> */ 361 /* FT_Matrix */ 362 /* */ 363 /* <Description> */ 364 /* A simple structure used to store a 2x2 matrix. Coefficients are */ 365 /* in 16.16 fixed float format. The computation performed is: */ 366 /* */ 367 /* { */ 368 /* x' = x*xx + y*xy */ 369 /* y' = x*yx + y*yy */ 370 /* } */ 371 /* */ 372 /* <Fields> */ 373 /* xx :: Matrix coefficient. */ 374 /* */ 375 /* xy :: Matrix coefficient. */ 376 /* */ 377 /* yx :: Matrix coefficient. */ 378 /* */ 379 /* yy :: Matrix coefficient. */ 380 /* */ 381 typedef struct FT_Matrix_ 382 { 383 FT_Fixed xx, xy; 384 FT_Fixed yx, yy; 385 386 } FT_Matrix; 387 388 389 /*************************************************************************/ 390 /* */ 391 /* <Struct> */ 392 /* FT_Data */ 393 /* */ 394 /* <Description> */ 395 /* Read-only binary data represented as a pointer and a length. */ 396 /* */ 397 /* <Fields> */ 398 /* pointer :: The data. */ 399 /* */ 400 /* length :: The length of the data in bytes. */ 401 /* */ 402 typedef struct FT_Data_ 403 { 404 const FT_Byte* pointer; 405 FT_Int length; 406 407 } FT_Data; 408 409 410 /*************************************************************************/ 411 /* */ 412 /* <FuncType> */ 413 /* FT_Generic_Finalizer */ 414 /* */ 415 /* <Description> */ 416 /* Describe a function used to destroy the `client' data of any */ 417 /* FreeType object. See the description of the @FT_Generic type for */ 418 /* details of usage. */ 419 /* */ 420 /* <Input> */ 421 /* The address of the FreeType object which is under finalization. */ 422 /* Its client data is accessed through its `generic' field. */ 423 /* */ 424 typedef void (*FT_Generic_Finalizer)(void* object); 425 426 427 /*************************************************************************/ 428 /* */ 429 /* <Struct> */ 430 /* FT_Generic */ 431 /* */ 432 /* <Description> */ 433 /* Client applications often need to associate their own data to a */ 434 /* variety of FreeType core objects. For example, a text layout API */ 435 /* might want to associate a glyph cache to a given size object. */ 436 /* */ 437 /* Most FreeType object contains a `generic' field, of type */ 438 /* FT_Generic, which usage is left to client applications and font */ 439 /* servers. */ 440 /* */ 441 /* It can be used to store a pointer to client-specific data, as well */ 442 /* as the address of a `finalizer' function, which will be called by */ 443 /* FreeType when the object is destroyed (for example, the previous */ 444 /* client example would put the address of the glyph cache destructor */ 445 /* in the `finalizer' field). */ 446 /* */ 447 /* <Fields> */ 448 /* data :: A typeless pointer to any client-specified data. This */ 449 /* field is completely ignored by the FreeType library. */ 450 /* */ 451 /* finalizer :: A pointer to a `generic finalizer' function, which */ 452 /* will be called when the object is destroyed. If this */ 453 /* field is set to NULL, no code will be called. */ 454 /* */ 455 typedef struct FT_Generic_ 456 { 457 void* data; 458 FT_Generic_Finalizer finalizer; 459 460 } FT_Generic; 461 462 463 /*************************************************************************/ 464 /* */ 465 /* <Macro> */ 466 /* FT_MAKE_TAG */ 467 /* */ 468 /* <Description> */ 469 /* This macro converts four-letter tags which are used to label */ 470 /* TrueType tables into an unsigned long to be used within FreeType. */ 471 /* */ 472 /* <Note> */ 473 /* The produced values *must* be 32-bit integers. Don't redefine */ 474 /* this macro. */ 475 /* */ 476 #define FT_MAKE_TAG( _x1, _x2, _x3, _x4 ) \ 477 (FT_Tag) \ 478 ( ( (FT_ULong)_x1 << 24 ) | \ 479 ( (FT_ULong)_x2 << 16 ) | \ 480 ( (FT_ULong)_x3 << 8 ) | \ 481 (FT_ULong)_x4 ) 482 483 484 /*************************************************************************/ 485 /*************************************************************************/ 486 /* */ 487 /* L I S T M A N A G E M E N T */ 488 /* */ 489 /*************************************************************************/ 490 /*************************************************************************/ 491 492 493 /*************************************************************************/ 494 /* */ 495 /* <Section> */ 496 /* list_processing */ 497 /* */ 498 /*************************************************************************/ 499 500 501 /*************************************************************************/ 502 /* */ 503 /* <Type> */ 504 /* FT_ListNode */ 505 /* */ 506 /* <Description> */ 507 /* Many elements and objects in FreeType are listed through an */ 508 /* @FT_List record (see @FT_ListRec). As its name suggests, an */ 509 /* FT_ListNode is a handle to a single list element. */ 510 /* */ 511 typedef struct FT_ListNodeRec_* FT_ListNode; 512 513 514 /*************************************************************************/ 515 /* */ 516 /* <Type> */ 517 /* FT_List */ 518 /* */ 519 /* <Description> */ 520 /* A handle to a list record (see @FT_ListRec). */ 521 /* */ 522 typedef struct FT_ListRec_* FT_List; 523 524 525 /*************************************************************************/ 526 /* */ 527 /* <Struct> */ 528 /* FT_ListNodeRec */ 529 /* */ 530 /* <Description> */ 531 /* A structure used to hold a single list element. */ 532 /* */ 533 /* <Fields> */ 534 /* prev :: The previous element in the list. NULL if first. */ 535 /* */ 536 /* next :: The next element in the list. NULL if last. */ 537 /* */ 538 /* data :: A typeless pointer to the listed object. */ 539 /* */ 540 typedef struct FT_ListNodeRec_ 541 { 542 FT_ListNode prev; 543 FT_ListNode next; 544 void* data; 545 546 } FT_ListNodeRec; 547 548 549 /*************************************************************************/ 550 /* */ 551 /* <Struct> */ 552 /* FT_ListRec */ 553 /* */ 554 /* <Description> */ 555 /* A structure used to hold a simple doubly-linked list. These are */ 556 /* used in many parts of FreeType. */ 557 /* */ 558 /* <Fields> */ 559 /* head :: The head (first element) of doubly-linked list. */ 560 /* */ 561 /* tail :: The tail (last element) of doubly-linked list. */ 562 /* */ 563 typedef struct FT_ListRec_ 564 { 565 FT_ListNode head; 566 FT_ListNode tail; 567 568 } FT_ListRec; 569 570 571 /* */ 572 573 #define FT_IS_EMPTY( list ) ( (list).head == 0 ) 574 575 /* return base error code (without module-specific prefix) */ 576 #define FT_ERROR_BASE( x ) ( (x) & 0xFF ) 577 578 /* return module error code */ 579 #define FT_ERROR_MODULE( x ) ( (x) & 0xFF00U ) 580 581 #define FT_BOOL( x ) ( (FT_Bool)( x ) ) 582 583 FT_END_HEADER 584 585 #endif /* __FTTYPES_H__ */ 586 587 588 /* END */ 589
