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1 | /***************************************************************************/ |
2 | /* */ | |
3 | /* ftglyph.h */ | |
4 | /* */ | |
5 | /* FreeType convenience functions to handle glyphs (specification). */ | |
6 | /* */ | |
7 | /* Copyright 1996-2003, 2006, 2008, 2009, 2011 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 | /*************************************************************************/ | |
20 | /* */ | |
21 | /* This file contains the definition of several convenience functions */ | |
22 | /* that can be used by client applications to easily retrieve glyph */ | |
23 | /* bitmaps and outlines from a given face. */ | |
24 | /* */ | |
25 | /* These functions should be optional if you are writing a font server */ | |
26 | /* or text layout engine on top of FreeType. However, they are pretty */ | |
27 | /* handy for many other simple uses of the library. */ | |
28 | /* */ | |
29 | /*************************************************************************/ | |
30 | ||
31 | ||
32 | #ifndef __FTGLYPH_H__ | |
33 | #define __FTGLYPH_H__ | |
34 | ||
35 | ||
36 | #include <ft2build.h> | |
37 | #include FT_FREETYPE_H | |
38 | ||
39 | #ifdef FREETYPE_H | |
40 | #error "freetype.h of FreeType 1 has been loaded!" | |
41 | #error "Please fix the directory search order for header files" | |
42 | #error "so that freetype.h of FreeType 2 is found first." | |
43 | #endif | |
44 | ||
45 | ||
46 | FT_BEGIN_HEADER | |
47 | ||
48 | ||
49 | /*************************************************************************/ | |
50 | /* */ | |
51 | /* <Section> */ | |
52 | /* glyph_management */ | |
53 | /* */ | |
54 | /* <Title> */ | |
55 | /* Glyph Management */ | |
56 | /* */ | |
57 | /* <Abstract> */ | |
58 | /* Generic interface to manage individual glyph data. */ | |
59 | /* */ | |
60 | /* <Description> */ | |
61 | /* This section contains definitions used to manage glyph data */ | |
62 | /* through generic FT_Glyph objects. Each of them can contain a */ | |
63 | /* bitmap, a vector outline, or even images in other formats. */ | |
64 | /* */ | |
65 | /*************************************************************************/ | |
66 | ||
67 | ||
68 | /* forward declaration to a private type */ | |
69 | typedef struct FT_Glyph_Class_ FT_Glyph_Class; | |
70 | ||
71 | ||
72 | /*************************************************************************/ | |
73 | /* */ | |
74 | /* <Type> */ | |
75 | /* FT_Glyph */ | |
76 | /* */ | |
77 | /* <Description> */ | |
78 | /* Handle to an object used to model generic glyph images. It is a */ | |
79 | /* pointer to the @FT_GlyphRec structure and can contain a glyph */ | |
80 | /* bitmap or pointer. */ | |
81 | /* */ | |
82 | /* <Note> */ | |
83 | /* Glyph objects are not owned by the library. You must thus release */ | |
84 | /* them manually (through @FT_Done_Glyph) _before_ calling */ | |
85 | /* @FT_Done_FreeType. */ | |
86 | /* */ | |
87 | typedef struct FT_GlyphRec_* FT_Glyph; | |
88 | ||
89 | ||
90 | /*************************************************************************/ | |
91 | /* */ | |
92 | /* <Struct> */ | |
93 | /* FT_GlyphRec */ | |
94 | /* */ | |
95 | /* <Description> */ | |
96 | /* The root glyph structure contains a given glyph image plus its */ | |
97 | /* advance width in 16.16 fixed-point format. */ | |
98 | /* */ | |
99 | /* <Fields> */ | |
100 | /* library :: A handle to the FreeType library object. */ | |
101 | /* */ | |
102 | /* clazz :: A pointer to the glyph's class. Private. */ | |
103 | /* */ | |
104 | /* format :: The format of the glyph's image. */ | |
105 | /* */ | |
106 | /* advance :: A 16.16 vector that gives the glyph's advance width. */ | |
107 | /* */ | |
108 | typedef struct FT_GlyphRec_ | |
109 | { | |
110 | FT_Library library; | |
111 | const FT_Glyph_Class* clazz; | |
112 | FT_Glyph_Format format; | |
113 | FT_Vector advance; | |
114 | ||
115 | } FT_GlyphRec; | |
116 | ||
117 | ||
118 | /*************************************************************************/ | |
119 | /* */ | |
120 | /* <Type> */ | |
121 | /* FT_BitmapGlyph */ | |
122 | /* */ | |
123 | /* <Description> */ | |
124 | /* A handle to an object used to model a bitmap glyph image. This is */ | |
125 | /* a sub-class of @FT_Glyph, and a pointer to @FT_BitmapGlyphRec. */ | |
126 | /* */ | |
127 | typedef struct FT_BitmapGlyphRec_* FT_BitmapGlyph; | |
128 | ||
129 | ||
130 | /*************************************************************************/ | |
131 | /* */ | |
132 | /* <Struct> */ | |
133 | /* FT_BitmapGlyphRec */ | |
134 | /* */ | |
135 | /* <Description> */ | |
136 | /* A structure used for bitmap glyph images. This really is a */ | |
137 | /* `sub-class' of @FT_GlyphRec. */ | |
138 | /* */ | |
139 | /* <Fields> */ | |
140 | /* root :: The root @FT_Glyph fields. */ | |
141 | /* */ | |
142 | /* left :: The left-side bearing, i.e., the horizontal distance */ | |
143 | /* from the current pen position to the left border of the */ | |
144 | /* glyph bitmap. */ | |
145 | /* */ | |
146 | /* top :: The top-side bearing, i.e., the vertical distance from */ | |
147 | /* the current pen position to the top border of the glyph */ | |
148 | /* bitmap. This distance is positive for upwards~y! */ | |
149 | /* */ | |
150 | /* bitmap :: A descriptor for the bitmap. */ | |
151 | /* */ | |
152 | /* <Note> */ | |
153 | /* You can typecast an @FT_Glyph to @FT_BitmapGlyph if you have */ | |
154 | /* `glyph->format == FT_GLYPH_FORMAT_BITMAP'. This lets you access */ | |
155 | /* the bitmap's contents easily. */ | |
156 | /* */ | |
157 | /* The corresponding pixel buffer is always owned by @FT_BitmapGlyph */ | |
158 | /* and is thus created and destroyed with it. */ | |
159 | /* */ | |
160 | typedef struct FT_BitmapGlyphRec_ | |
161 | { | |
162 | FT_GlyphRec root; | |
163 | FT_Int left; | |
164 | FT_Int top; | |
165 | FT_Bitmap bitmap; | |
166 | ||
167 | } FT_BitmapGlyphRec; | |
168 | ||
169 | ||
170 | /*************************************************************************/ | |
171 | /* */ | |
172 | /* <Type> */ | |
173 | /* FT_OutlineGlyph */ | |
174 | /* */ | |
175 | /* <Description> */ | |
176 | /* A handle to an object used to model an outline glyph image. This */ | |
177 | /* is a sub-class of @FT_Glyph, and a pointer to @FT_OutlineGlyphRec. */ | |
178 | /* */ | |
179 | typedef struct FT_OutlineGlyphRec_* FT_OutlineGlyph; | |
180 | ||
181 | ||
182 | /*************************************************************************/ | |
183 | /* */ | |
184 | /* <Struct> */ | |
185 | /* FT_OutlineGlyphRec */ | |
186 | /* */ | |
187 | /* <Description> */ | |
188 | /* A structure used for outline (vectorial) glyph images. This */ | |
189 | /* really is a `sub-class' of @FT_GlyphRec. */ | |
190 | /* */ | |
191 | /* <Fields> */ | |
192 | /* root :: The root @FT_Glyph fields. */ | |
193 | /* */ | |
194 | /* outline :: A descriptor for the outline. */ | |
195 | /* */ | |
196 | /* <Note> */ | |
197 | /* You can typecast an @FT_Glyph to @FT_OutlineGlyph if you have */ | |
198 | /* `glyph->format == FT_GLYPH_FORMAT_OUTLINE'. This lets you access */ | |
199 | /* the outline's content easily. */ | |
200 | /* */ | |
201 | /* As the outline is extracted from a glyph slot, its coordinates are */ | |
202 | /* expressed normally in 26.6 pixels, unless the flag */ | |
203 | /* @FT_LOAD_NO_SCALE was used in @FT_Load_Glyph() or @FT_Load_Char(). */ | |
204 | /* */ | |
205 | /* The outline's tables are always owned by the object and are */ | |
206 | /* destroyed with it. */ | |
207 | /* */ | |
208 | typedef struct FT_OutlineGlyphRec_ | |
209 | { | |
210 | FT_GlyphRec root; | |
211 | FT_Outline outline; | |
212 | ||
213 | } FT_OutlineGlyphRec; | |
214 | ||
215 | ||
216 | /*************************************************************************/ | |
217 | /* */ | |
218 | /* <Function> */ | |
219 | /* FT_Get_Glyph */ | |
220 | /* */ | |
221 | /* <Description> */ | |
222 | /* A function used to extract a glyph image from a slot. Note that */ | |
223 | /* the created @FT_Glyph object must be released with @FT_Done_Glyph. */ | |
224 | /* */ | |
225 | /* <Input> */ | |
226 | /* slot :: A handle to the source glyph slot. */ | |
227 | /* */ | |
228 | /* <Output> */ | |
229 | /* aglyph :: A handle to the glyph object. */ | |
230 | /* */ | |
231 | /* <Return> */ | |
232 | /* FreeType error code. 0~means success. */ | |
233 | /* */ | |
234 | FT_EXPORT( FT_Error ) | |
235 | FT_Get_Glyph( FT_GlyphSlot slot, | |
236 | FT_Glyph *aglyph ); | |
237 | ||
238 | ||
239 | /*************************************************************************/ | |
240 | /* */ | |
241 | /* <Function> */ | |
242 | /* FT_Glyph_Copy */ | |
243 | /* */ | |
244 | /* <Description> */ | |
245 | /* A function used to copy a glyph image. Note that the created */ | |
246 | /* @FT_Glyph object must be released with @FT_Done_Glyph. */ | |
247 | /* */ | |
248 | /* <Input> */ | |
249 | /* source :: A handle to the source glyph object. */ | |
250 | /* */ | |
251 | /* <Output> */ | |
252 | /* target :: A handle to the target glyph object. 0~in case of */ | |
253 | /* error. */ | |
254 | /* */ | |
255 | /* <Return> */ | |
256 | /* FreeType error code. 0~means success. */ | |
257 | /* */ | |
258 | FT_EXPORT( FT_Error ) | |
259 | FT_Glyph_Copy( FT_Glyph source, | |
260 | FT_Glyph *target ); | |
261 | ||
262 | ||
263 | /*************************************************************************/ | |
264 | /* */ | |
265 | /* <Function> */ | |
266 | /* FT_Glyph_Transform */ | |
267 | /* */ | |
268 | /* <Description> */ | |
269 | /* Transform a glyph image if its format is scalable. */ | |
270 | /* */ | |
271 | /* <InOut> */ | |
272 | /* glyph :: A handle to the target glyph object. */ | |
273 | /* */ | |
274 | /* <Input> */ | |
275 | /* matrix :: A pointer to a 2x2 matrix to apply. */ | |
276 | /* */ | |
277 | /* delta :: A pointer to a 2d vector to apply. Coordinates are */ | |
278 | /* expressed in 1/64th of a pixel. */ | |
279 | /* */ | |
280 | /* <Return> */ | |
281 | /* FreeType error code (if not 0, the glyph format is not scalable). */ | |
282 | /* */ | |
283 | /* <Note> */ | |
284 | /* The 2x2 transformation matrix is also applied to the glyph's */ | |
285 | /* advance vector. */ | |
286 | /* */ | |
287 | FT_EXPORT( FT_Error ) | |
288 | FT_Glyph_Transform( FT_Glyph glyph, | |
289 | FT_Matrix* matrix, | |
290 | FT_Vector* delta ); | |
291 | ||
292 | ||
293 | /*************************************************************************/ | |
294 | /* */ | |
295 | /* <Enum> */ | |
296 | /* FT_Glyph_BBox_Mode */ | |
297 | /* */ | |
298 | /* <Description> */ | |
299 | /* The mode how the values of @FT_Glyph_Get_CBox are returned. */ | |
300 | /* */ | |
301 | /* <Values> */ | |
302 | /* FT_GLYPH_BBOX_UNSCALED :: */ | |
303 | /* Return unscaled font units. */ | |
304 | /* */ | |
305 | /* FT_GLYPH_BBOX_SUBPIXELS :: */ | |
306 | /* Return unfitted 26.6 coordinates. */ | |
307 | /* */ | |
308 | /* FT_GLYPH_BBOX_GRIDFIT :: */ | |
309 | /* Return grid-fitted 26.6 coordinates. */ | |
310 | /* */ | |
311 | /* FT_GLYPH_BBOX_TRUNCATE :: */ | |
312 | /* Return coordinates in integer pixels. */ | |
313 | /* */ | |
314 | /* FT_GLYPH_BBOX_PIXELS :: */ | |
315 | /* Return grid-fitted pixel coordinates. */ | |
316 | /* */ | |
317 | typedef enum FT_Glyph_BBox_Mode_ | |
318 | { | |
319 | FT_GLYPH_BBOX_UNSCALED = 0, | |
320 | FT_GLYPH_BBOX_SUBPIXELS = 0, | |
321 | FT_GLYPH_BBOX_GRIDFIT = 1, | |
322 | FT_GLYPH_BBOX_TRUNCATE = 2, | |
323 | FT_GLYPH_BBOX_PIXELS = 3 | |
324 | ||
325 | } FT_Glyph_BBox_Mode; | |
326 | ||
327 | ||
328 | /*************************************************************************/ | |
329 | /* */ | |
330 | /* <Enum> */ | |
331 | /* ft_glyph_bbox_xxx */ | |
332 | /* */ | |
333 | /* <Description> */ | |
334 | /* These constants are deprecated. Use the corresponding */ | |
335 | /* @FT_Glyph_BBox_Mode values instead. */ | |
336 | /* */ | |
337 | /* <Values> */ | |
338 | /* ft_glyph_bbox_unscaled :: See @FT_GLYPH_BBOX_UNSCALED. */ | |
339 | /* ft_glyph_bbox_subpixels :: See @FT_GLYPH_BBOX_SUBPIXELS. */ | |
340 | /* ft_glyph_bbox_gridfit :: See @FT_GLYPH_BBOX_GRIDFIT. */ | |
341 | /* ft_glyph_bbox_truncate :: See @FT_GLYPH_BBOX_TRUNCATE. */ | |
342 | /* ft_glyph_bbox_pixels :: See @FT_GLYPH_BBOX_PIXELS. */ | |
343 | /* */ | |
344 | #define ft_glyph_bbox_unscaled FT_GLYPH_BBOX_UNSCALED | |
345 | #define ft_glyph_bbox_subpixels FT_GLYPH_BBOX_SUBPIXELS | |
346 | #define ft_glyph_bbox_gridfit FT_GLYPH_BBOX_GRIDFIT | |
347 | #define ft_glyph_bbox_truncate FT_GLYPH_BBOX_TRUNCATE | |
348 | #define ft_glyph_bbox_pixels FT_GLYPH_BBOX_PIXELS | |
349 | ||
350 | ||
351 | /*************************************************************************/ | |
352 | /* */ | |
353 | /* <Function> */ | |
354 | /* FT_Glyph_Get_CBox */ | |
355 | /* */ | |
356 | /* <Description> */ | |
357 | /* Return a glyph's `control box'. The control box encloses all the */ | |
358 | /* outline's points, including Bézier control points. Though it */ | |
359 | /* coincides with the exact bounding box for most glyphs, it can be */ | |
360 | /* slightly larger in some situations (like when rotating an outline */ | |
361 | /* which contains Bézier outside arcs). */ | |
362 | /* */ | |
363 | /* Computing the control box is very fast, while getting the bounding */ | |
364 | /* box can take much more time as it needs to walk over all segments */ | |
365 | /* and arcs in the outline. To get the latter, you can use the */ | |
366 | /* `ftbbox' component which is dedicated to this single task. */ | |
367 | /* */ | |
368 | /* <Input> */ | |
369 | /* glyph :: A handle to the source glyph object. */ | |
370 | /* */ | |
371 | /* mode :: The mode which indicates how to interpret the returned */ | |
372 | /* bounding box values. */ | |
373 | /* */ | |
374 | /* <Output> */ | |
375 | /* acbox :: The glyph coordinate bounding box. Coordinates are */ | |
376 | /* expressed in 1/64th of pixels if it is grid-fitted. */ | |
377 | /* */ | |
378 | /* <Note> */ | |
379 | /* Coordinates are relative to the glyph origin, using the y~upwards */ | |
380 | /* convention. */ | |
381 | /* */ | |
382 | /* If the glyph has been loaded with @FT_LOAD_NO_SCALE, `bbox_mode' */ | |
383 | /* must be set to @FT_GLYPH_BBOX_UNSCALED to get unscaled font */ | |
384 | /* units in 26.6 pixel format. The value @FT_GLYPH_BBOX_SUBPIXELS */ | |
385 | /* is another name for this constant. */ | |
386 | /* */ | |
387 | /* If the font is tricky and the glyph has been loaded with */ | |
388 | /* @FT_LOAD_NO_SCALE, the resulting CBox is meaningless. To get */ | |
389 | /* reasonable values for the CBox it is necessary to load the glyph */ | |
390 | /* at a large ppem value (so that the hinting instructions can */ | |
391 | /* properly shift and scale the subglyphs), then extracting the CBox */ | |
392 | /* which can be eventually converted back to font units. */ | |
393 | /* */ | |
394 | /* Note that the maximum coordinates are exclusive, which means that */ | |
395 | /* one can compute the width and height of the glyph image (be it in */ | |
396 | /* integer or 26.6 pixels) as: */ | |
397 | /* */ | |
398 | /* { */ | |
399 | /* width = bbox.xMax - bbox.xMin; */ | |
400 | /* height = bbox.yMax - bbox.yMin; */ | |
401 | /* } */ | |
402 | /* */ | |
403 | /* Note also that for 26.6 coordinates, if `bbox_mode' is set to */ | |
404 | /* @FT_GLYPH_BBOX_GRIDFIT, the coordinates will also be grid-fitted, */ | |
405 | /* which corresponds to: */ | |
406 | /* */ | |
407 | /* { */ | |
408 | /* bbox.xMin = FLOOR(bbox.xMin); */ | |
409 | /* bbox.yMin = FLOOR(bbox.yMin); */ | |
410 | /* bbox.xMax = CEILING(bbox.xMax); */ | |
411 | /* bbox.yMax = CEILING(bbox.yMax); */ | |
412 | /* } */ | |
413 | /* */ | |
414 | /* To get the bbox in pixel coordinates, set `bbox_mode' to */ | |
415 | /* @FT_GLYPH_BBOX_TRUNCATE. */ | |
416 | /* */ | |
417 | /* To get the bbox in grid-fitted pixel coordinates, set `bbox_mode' */ | |
418 | /* to @FT_GLYPH_BBOX_PIXELS. */ | |
419 | /* */ | |
420 | FT_EXPORT( void ) | |
421 | FT_Glyph_Get_CBox( FT_Glyph glyph, | |
422 | FT_UInt bbox_mode, | |
423 | FT_BBox *acbox ); | |
424 | ||
425 | ||
426 | /*************************************************************************/ | |
427 | /* */ | |
428 | /* <Function> */ | |
429 | /* FT_Glyph_To_Bitmap */ | |
430 | /* */ | |
431 | /* <Description> */ | |
432 | /* Convert a given glyph object to a bitmap glyph object. */ | |
433 | /* */ | |
434 | /* <InOut> */ | |
435 | /* the_glyph :: A pointer to a handle to the target glyph. */ | |
436 | /* */ | |
437 | /* <Input> */ | |
438 | /* render_mode :: An enumeration that describes how the data is */ | |
439 | /* rendered. */ | |
440 | /* */ | |
441 | /* origin :: A pointer to a vector used to translate the glyph */ | |
442 | /* image before rendering. Can be~0 (if no */ | |
443 | /* translation). The origin is expressed in */ | |
444 | /* 26.6 pixels. */ | |
445 | /* */ | |
446 | /* destroy :: A boolean that indicates that the original glyph */ | |
447 | /* image should be destroyed by this function. It is */ | |
448 | /* never destroyed in case of error. */ | |
449 | /* */ | |
450 | /* <Return> */ | |
451 | /* FreeType error code. 0~means success. */ | |
452 | /* */ | |
453 | /* <Note> */ | |
454 | /* This function does nothing if the glyph format isn't scalable. */ | |
455 | /* */ | |
456 | /* The glyph image is translated with the `origin' vector before */ | |
457 | /* rendering. */ | |
458 | /* */ | |
459 | /* The first parameter is a pointer to an @FT_Glyph handle, that will */ | |
460 | /* be _replaced_ by this function (with newly allocated data). */ | |
461 | /* Typically, you would use (omitting error handling): */ | |
462 | /* */ | |
463 | /* */ | |
464 | /* { */ | |
465 | /* FT_Glyph glyph; */ | |
466 | /* FT_BitmapGlyph glyph_bitmap; */ | |
467 | /* */ | |
468 | /* */ | |
469 | /* // load glyph */ | |
470 | /* error = FT_Load_Char( face, glyph_index, FT_LOAD_DEFAUT ); */ | |
471 | /* */ | |
472 | /* // extract glyph image */ | |
473 | /* error = FT_Get_Glyph( face->glyph, &glyph ); */ | |
474 | /* */ | |
475 | /* // convert to a bitmap (default render mode + destroying old) */ | |
476 | /* if ( glyph->format != FT_GLYPH_FORMAT_BITMAP ) */ | |
477 | /* { */ | |
478 | /* error = FT_Glyph_To_Bitmap( &glyph, FT_RENDER_MODE_NORMAL, */ | |
479 | /* 0, 1 ); */ | |
480 | /* if ( error ) // `glyph' unchanged */ | |
481 | /* ... */ | |
482 | /* } */ | |
483 | /* */ | |
484 | /* // access bitmap content by typecasting */ | |
485 | /* glyph_bitmap = (FT_BitmapGlyph)glyph; */ | |
486 | /* */ | |
487 | /* // do funny stuff with it, like blitting/drawing */ | |
488 | /* ... */ | |
489 | /* */ | |
490 | /* // discard glyph image (bitmap or not) */ | |
491 | /* FT_Done_Glyph( glyph ); */ | |
492 | /* } */ | |
493 | /* */ | |
494 | /* */ | |
495 | /* Here another example, again without error handling: */ | |
496 | /* */ | |
497 | /* */ | |
498 | /* { */ | |
499 | /* FT_Glyph glyphs[MAX_GLYPHS] */ | |
500 | /* */ | |
501 | /* */ | |
502 | /* ... */ | |
503 | /* */ | |
504 | /* for ( idx = 0; i < MAX_GLYPHS; i++ ) */ | |
505 | /* error = FT_Load_Glyph( face, idx, FT_LOAD_DEFAULT ) || */ | |
506 | /* FT_Get_Glyph ( face->glyph, &glyph[idx] ); */ | |
507 | /* */ | |
508 | /* ... */ | |
509 | /* */ | |
510 | /* for ( idx = 0; i < MAX_GLYPHS; i++ ) */ | |
511 | /* { */ | |
512 | /* FT_Glyph bitmap = glyphs[idx]; */ | |
513 | /* */ | |
514 | /* */ | |
515 | /* ... */ | |
516 | /* */ | |
517 | /* // after this call, `bitmap' no longer points into */ | |
518 | /* // the `glyphs' array (and the old value isn't destroyed) */ | |
519 | /* FT_Glyph_To_Bitmap( &bitmap, FT_RENDER_MODE_MONO, 0, 0 ); */ | |
520 | /* */ | |
521 | /* ... */ | |
522 | /* */ | |
523 | /* FT_Done_Glyph( bitmap ); */ | |
524 | /* } */ | |
525 | /* */ | |
526 | /* ... */ | |
527 | /* */ | |
528 | /* for ( idx = 0; i < MAX_GLYPHS; i++ ) */ | |
529 | /* FT_Done_Glyph( glyphs[idx] ); */ | |
530 | /* } */ | |
531 | /* */ | |
532 | FT_EXPORT( FT_Error ) | |
533 | FT_Glyph_To_Bitmap( FT_Glyph* the_glyph, | |
534 | FT_Render_Mode render_mode, | |
535 | FT_Vector* origin, | |
536 | FT_Bool destroy ); | |
537 | ||
538 | ||
539 | /*************************************************************************/ | |
540 | /* */ | |
541 | /* <Function> */ | |
542 | /* FT_Done_Glyph */ | |
543 | /* */ | |
544 | /* <Description> */ | |
545 | /* Destroy a given glyph. */ | |
546 | /* */ | |
547 | /* <Input> */ | |
548 | /* glyph :: A handle to the target glyph object. */ | |
549 | /* */ | |
550 | FT_EXPORT( void ) | |
551 | FT_Done_Glyph( FT_Glyph glyph ); | |
552 | ||
553 | /* */ | |
554 | ||
555 | ||
556 | /* other helpful functions */ | |
557 | ||
558 | /*************************************************************************/ | |
559 | /* */ | |
560 | /* <Section> */ | |
561 | /* computations */ | |
562 | /* */ | |
563 | /*************************************************************************/ | |
564 | ||
565 | ||
566 | /*************************************************************************/ | |
567 | /* */ | |
568 | /* <Function> */ | |
569 | /* FT_Matrix_Multiply */ | |
570 | /* */ | |
571 | /* <Description> */ | |
572 | /* Perform the matrix operation `b = a*b'. */ | |
573 | /* */ | |
574 | /* <Input> */ | |
575 | /* a :: A pointer to matrix `a'. */ | |
576 | /* */ | |
577 | /* <InOut> */ | |
578 | /* b :: A pointer to matrix `b'. */ | |
579 | /* */ | |
580 | /* <Note> */ | |
581 | /* The result is undefined if either `a' or `b' is zero. */ | |
582 | /* */ | |
583 | FT_EXPORT( void ) | |
584 | FT_Matrix_Multiply( const FT_Matrix* a, | |
585 | FT_Matrix* b ); | |
586 | ||
587 | ||
588 | /*************************************************************************/ | |
589 | /* */ | |
590 | /* <Function> */ | |
591 | /* FT_Matrix_Invert */ | |
592 | /* */ | |
593 | /* <Description> */ | |
594 | /* Invert a 2x2 matrix. Return an error if it can't be inverted. */ | |
595 | /* */ | |
596 | /* <InOut> */ | |
597 | /* matrix :: A pointer to the target matrix. Remains untouched in */ | |
598 | /* case of error. */ | |
599 | /* */ | |
600 | /* <Return> */ | |
601 | /* FreeType error code. 0~means success. */ | |
602 | /* */ | |
603 | FT_EXPORT( FT_Error ) | |
604 | FT_Matrix_Invert( FT_Matrix* matrix ); | |
605 | ||
606 | ||
607 | /* */ | |
608 | ||
609 | ||
610 | FT_END_HEADER | |
611 | ||
612 | #endif /* __FTGLYPH_H__ */ | |
613 | ||
614 | ||
615 | /* END */ | |
616 | ||
617 | ||
618 | /* Local Variables: */ | |
619 | /* coding: utf-8 */ | |
620 | /* End: */ |