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| author | John Tsiombikas <nuclear@member.fsf.org> |
|---|---|
| date | Sun, 02 Feb 2014 00:35:22 +0200 |
| parents | |
| children |
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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 /***************************************************************************/
19 #ifndef __FTTYPES_H__
20 #define __FTTYPES_H__
23 #include <ft2build.h>
24 #include FT_CONFIG_CONFIG_H
25 #include FT_SYSTEM_H
26 #include FT_IMAGE_H
28 #include <stddef.h>
31 FT_BEGIN_HEADER
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 /*************************************************************************/
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;
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 */
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 */
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;
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;
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;
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;
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;
186 /*************************************************************************/
187 /* */
188 /* <Type> */
189 /* FT_Short */
190 /* */
191 /* <Description> */
192 /* A typedef for signed short. */
193 /* */
194 typedef signed short FT_Short;
197 /*************************************************************************/
198 /* */
199 /* <Type> */
200 /* FT_UShort */
201 /* */
202 /* <Description> */
203 /* A typedef for unsigned short. */
204 /* */
205 typedef unsigned short FT_UShort;
208 /*************************************************************************/
209 /* */
210 /* <Type> */
211 /* FT_Int */
212 /* */
213 /* <Description> */
214 /* A typedef for the int type. */
215 /* */
216 typedef signed int FT_Int;
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;
230 /*************************************************************************/
231 /* */
232 /* <Type> */
233 /* FT_Long */
234 /* */
235 /* <Description> */
236 /* A typedef for signed long. */
237 /* */
238 typedef signed long FT_Long;
241 /*************************************************************************/
242 /* */
243 /* <Type> */
244 /* FT_ULong */
245 /* */
246 /* <Description> */
247 /* A typedef for unsigned long. */
248 /* */
249 typedef unsigned long FT_ULong;
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;
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;
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;
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;
299 /*************************************************************************/
300 /* */
301 /* <Type> */
302 /* FT_Pointer */
303 /* */
304 /* <Description> */
305 /* A simple typedef for a typeless pointer. */
306 /* */
307 typedef void* FT_Pointer;
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;
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;
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;
355 } FT_UnitVector;
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;
386 } FT_Matrix;
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;
407 } FT_Data;
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);
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;
460 } FT_Generic;
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 )
484 /*************************************************************************/
485 /*************************************************************************/
486 /* */
487 /* L I S T M A N A G E M E N T */
488 /* */
489 /*************************************************************************/
490 /*************************************************************************/
493 /*************************************************************************/
494 /* */
495 /* <Section> */
496 /* list_processing */
497 /* */
498 /*************************************************************************/
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;
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;
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;
546 } FT_ListNodeRec;
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;
568 } FT_ListRec;
571 /* */
573 #define FT_IS_EMPTY( list ) ( (list).head == 0 )
575 /* return base error code (without module-specific prefix) */
576 #define FT_ERROR_BASE( x ) ( (x) & 0xFF )
578 /* return module error code */
579 #define FT_ERROR_MODULE( x ) ( (x) & 0xFF00U )
581 #define FT_BOOL( x ) ( (FT_Bool)( x ) )
583 FT_END_HEADER
585 #endif /* __FTTYPES_H__ */
588 /* END */