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| author | John Tsiombikas <nuclear@member.fsf.org> |
|---|---|
| date | Sun, 02 Feb 2014 00:35:22 +0200 |
| parents | |
| children |
line source
1 /***************************************************************************/
2 /* */
3 /* freetype.h */
4 /* */
5 /* FreeType high-level API and common types (specification only). */
6 /* */
7 /* Copyright 1996-2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, */
8 /* 2010 by */
9 /* David Turner, Robert Wilhelm, and Werner Lemberg. */
10 /* */
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. */
16 /* */
17 /***************************************************************************/
20 #ifndef FT_FREETYPE_H
21 #error "`ft2build.h' hasn't been included yet!"
22 #error "Please always use macros to include FreeType header files."
23 #error "Example:"
24 #error " #include <ft2build.h>"
25 #error " #include FT_FREETYPE_H"
26 #endif
29 #ifndef __FREETYPE_H__
30 #define __FREETYPE_H__
33 #include <ft2build.h>
34 #include FT_CONFIG_CONFIG_H
35 #include FT_ERRORS_H
36 #include FT_TYPES_H
39 FT_BEGIN_HEADER
43 /*************************************************************************/
44 /* */
45 /* <Section> */
46 /* user_allocation */
47 /* */
48 /* <Title> */
49 /* User allocation */
50 /* */
51 /* <Abstract> */
52 /* How client applications should allocate FreeType data structures. */
53 /* */
54 /* <Description> */
55 /* FreeType assumes that structures allocated by the user and passed */
56 /* as arguments are zeroed out except for the actual data. In other */
57 /* words, it is recommended to use `calloc' (or variants of it) */
58 /* instead of `malloc' for allocation. */
59 /* */
60 /*************************************************************************/
64 /*************************************************************************/
65 /*************************************************************************/
66 /* */
67 /* B A S I C T Y P E S */
68 /* */
69 /*************************************************************************/
70 /*************************************************************************/
73 /*************************************************************************/
74 /* */
75 /* <Section> */
76 /* base_interface */
77 /* */
78 /* <Title> */
79 /* Base Interface */
80 /* */
81 /* <Abstract> */
82 /* The FreeType~2 base font interface. */
83 /* */
84 /* <Description> */
85 /* This section describes the public high-level API of FreeType~2. */
86 /* */
87 /* <Order> */
88 /* FT_Library */
89 /* FT_Face */
90 /* FT_Size */
91 /* FT_GlyphSlot */
92 /* FT_CharMap */
93 /* FT_Encoding */
94 /* */
95 /* FT_FaceRec */
96 /* */
97 /* FT_FACE_FLAG_SCALABLE */
98 /* FT_FACE_FLAG_FIXED_SIZES */
99 /* FT_FACE_FLAG_FIXED_WIDTH */
100 /* FT_FACE_FLAG_HORIZONTAL */
101 /* FT_FACE_FLAG_VERTICAL */
102 /* FT_FACE_FLAG_SFNT */
103 /* FT_FACE_FLAG_KERNING */
104 /* FT_FACE_FLAG_MULTIPLE_MASTERS */
105 /* FT_FACE_FLAG_GLYPH_NAMES */
106 /* FT_FACE_FLAG_EXTERNAL_STREAM */
107 /* FT_FACE_FLAG_FAST_GLYPHS */
108 /* FT_FACE_FLAG_HINTER */
109 /* */
110 /* FT_STYLE_FLAG_BOLD */
111 /* FT_STYLE_FLAG_ITALIC */
112 /* */
113 /* FT_SizeRec */
114 /* FT_Size_Metrics */
115 /* */
116 /* FT_GlyphSlotRec */
117 /* FT_Glyph_Metrics */
118 /* FT_SubGlyph */
119 /* */
120 /* FT_Bitmap_Size */
121 /* */
122 /* FT_Init_FreeType */
123 /* FT_Done_FreeType */
124 /* */
125 /* FT_New_Face */
126 /* FT_Done_Face */
127 /* FT_New_Memory_Face */
128 /* FT_Open_Face */
129 /* FT_Open_Args */
130 /* FT_Parameter */
131 /* FT_Attach_File */
132 /* FT_Attach_Stream */
133 /* */
134 /* FT_Set_Char_Size */
135 /* FT_Set_Pixel_Sizes */
136 /* FT_Request_Size */
137 /* FT_Select_Size */
138 /* FT_Size_Request_Type */
139 /* FT_Size_Request */
140 /* FT_Set_Transform */
141 /* FT_Load_Glyph */
142 /* FT_Get_Char_Index */
143 /* FT_Get_Name_Index */
144 /* FT_Load_Char */
145 /* */
146 /* FT_OPEN_MEMORY */
147 /* FT_OPEN_STREAM */
148 /* FT_OPEN_PATHNAME */
149 /* FT_OPEN_DRIVER */
150 /* FT_OPEN_PARAMS */
151 /* */
152 /* FT_LOAD_DEFAULT */
153 /* FT_LOAD_RENDER */
154 /* FT_LOAD_MONOCHROME */
155 /* FT_LOAD_LINEAR_DESIGN */
156 /* FT_LOAD_NO_SCALE */
157 /* FT_LOAD_NO_HINTING */
158 /* FT_LOAD_NO_BITMAP */
159 /* FT_LOAD_CROP_BITMAP */
160 /* */
161 /* FT_LOAD_VERTICAL_LAYOUT */
162 /* FT_LOAD_IGNORE_TRANSFORM */
163 /* FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH */
164 /* FT_LOAD_FORCE_AUTOHINT */
165 /* FT_LOAD_NO_RECURSE */
166 /* FT_LOAD_PEDANTIC */
167 /* */
168 /* FT_LOAD_TARGET_NORMAL */
169 /* FT_LOAD_TARGET_LIGHT */
170 /* FT_LOAD_TARGET_MONO */
171 /* FT_LOAD_TARGET_LCD */
172 /* FT_LOAD_TARGET_LCD_V */
173 /* */
174 /* FT_Render_Glyph */
175 /* FT_Render_Mode */
176 /* FT_Get_Kerning */
177 /* FT_Kerning_Mode */
178 /* FT_Get_Track_Kerning */
179 /* FT_Get_Glyph_Name */
180 /* FT_Get_Postscript_Name */
181 /* */
182 /* FT_CharMapRec */
183 /* FT_Select_Charmap */
184 /* FT_Set_Charmap */
185 /* FT_Get_Charmap_Index */
186 /* */
187 /* FT_FSTYPE_INSTALLABLE_EMBEDDING */
188 /* FT_FSTYPE_RESTRICTED_LICENSE_EMBEDDING */
189 /* FT_FSTYPE_PREVIEW_AND_PRINT_EMBEDDING */
190 /* FT_FSTYPE_EDITABLE_EMBEDDING */
191 /* FT_FSTYPE_NO_SUBSETTING */
192 /* FT_FSTYPE_BITMAP_EMBEDDING_ONLY */
193 /* */
194 /* FT_Get_FSType_Flags */
195 /* */
196 /*************************************************************************/
199 /*************************************************************************/
200 /* */
201 /* <Struct> */
202 /* FT_Glyph_Metrics */
203 /* */
204 /* <Description> */
205 /* A structure used to model the metrics of a single glyph. The */
206 /* values are expressed in 26.6 fractional pixel format; if the flag */
207 /* @FT_LOAD_NO_SCALE has been used while loading the glyph, values */
208 /* are expressed in font units instead. */
209 /* */
210 /* <Fields> */
211 /* width :: */
212 /* The glyph's width. */
213 /* */
214 /* height :: */
215 /* The glyph's height. */
216 /* */
217 /* horiBearingX :: */
218 /* Left side bearing for horizontal layout. */
219 /* */
220 /* horiBearingY :: */
221 /* Top side bearing for horizontal layout. */
222 /* */
223 /* horiAdvance :: */
224 /* Advance width for horizontal layout. */
225 /* */
226 /* vertBearingX :: */
227 /* Left side bearing for vertical layout. */
228 /* */
229 /* vertBearingY :: */
230 /* Top side bearing for vertical layout. */
231 /* */
232 /* vertAdvance :: */
233 /* Advance height for vertical layout. */
234 /* */
235 /* <Note> */
236 /* If not disabled with @FT_LOAD_NO_HINTING, the values represent */
237 /* dimensions of the hinted glyph (in case hinting is applicable). */
238 /* */
239 typedef struct FT_Glyph_Metrics_
240 {
241 FT_Pos width;
242 FT_Pos height;
244 FT_Pos horiBearingX;
245 FT_Pos horiBearingY;
246 FT_Pos horiAdvance;
248 FT_Pos vertBearingX;
249 FT_Pos vertBearingY;
250 FT_Pos vertAdvance;
252 } FT_Glyph_Metrics;
255 /*************************************************************************/
256 /* */
257 /* <Struct> */
258 /* FT_Bitmap_Size */
259 /* */
260 /* <Description> */
261 /* This structure models the metrics of a bitmap strike (i.e., a set */
262 /* of glyphs for a given point size and resolution) in a bitmap font. */
263 /* It is used for the `available_sizes' field of @FT_Face. */
264 /* */
265 /* <Fields> */
266 /* height :: The vertical distance, in pixels, between two */
267 /* consecutive baselines. It is always positive. */
268 /* */
269 /* width :: The average width, in pixels, of all glyphs in the */
270 /* strike. */
271 /* */
272 /* size :: The nominal size of the strike in 26.6 fractional */
273 /* points. This field is not very useful. */
274 /* */
275 /* x_ppem :: The horizontal ppem (nominal width) in 26.6 fractional */
276 /* pixels. */
277 /* */
278 /* y_ppem :: The vertical ppem (nominal height) in 26.6 fractional */
279 /* pixels. */
280 /* */
281 /* <Note> */
282 /* Windows FNT: */
283 /* The nominal size given in a FNT font is not reliable. Thus when */
284 /* the driver finds it incorrect, it sets `size' to some calculated */
285 /* values and sets `x_ppem' and `y_ppem' to the pixel width and */
286 /* height given in the font, respectively. */
287 /* */
288 /* TrueType embedded bitmaps: */
289 /* `size', `width', and `height' values are not contained in the */
290 /* bitmap strike itself. They are computed from the global font */
291 /* parameters. */
292 /* */
293 typedef struct FT_Bitmap_Size_
294 {
295 FT_Short height;
296 FT_Short width;
298 FT_Pos size;
300 FT_Pos x_ppem;
301 FT_Pos y_ppem;
303 } FT_Bitmap_Size;
306 /*************************************************************************/
307 /*************************************************************************/
308 /* */
309 /* O B J E C T C L A S S E S */
310 /* */
311 /*************************************************************************/
312 /*************************************************************************/
314 /*************************************************************************/
315 /* */
316 /* <Type> */
317 /* FT_Library */
318 /* */
319 /* <Description> */
320 /* A handle to a FreeType library instance. Each `library' is */
321 /* completely independent from the others; it is the `root' of a set */
322 /* of objects like fonts, faces, sizes, etc. */
323 /* */
324 /* It also embeds a memory manager (see @FT_Memory), as well as a */
325 /* scan-line converter object (see @FT_Raster). */
326 /* */
327 /* For multi-threading applications each thread should have its own */
328 /* FT_Library object. */
329 /* */
330 /* <Note> */
331 /* Library objects are normally created by @FT_Init_FreeType, and */
332 /* destroyed with @FT_Done_FreeType. */
333 /* */
334 typedef struct FT_LibraryRec_ *FT_Library;
337 /*************************************************************************/
338 /* */
339 /* <Type> */
340 /* FT_Module */
341 /* */
342 /* <Description> */
343 /* A handle to a given FreeType module object. Each module can be a */
344 /* font driver, a renderer, or anything else that provides services */
345 /* to the formers. */
346 /* */
347 typedef struct FT_ModuleRec_* FT_Module;
350 /*************************************************************************/
351 /* */
352 /* <Type> */
353 /* FT_Driver */
354 /* */
355 /* <Description> */
356 /* A handle to a given FreeType font driver object. Each font driver */
357 /* is a special module capable of creating faces from font files. */
358 /* */
359 typedef struct FT_DriverRec_* FT_Driver;
362 /*************************************************************************/
363 /* */
364 /* <Type> */
365 /* FT_Renderer */
366 /* */
367 /* <Description> */
368 /* A handle to a given FreeType renderer. A renderer is a special */
369 /* module in charge of converting a glyph image to a bitmap, when */
370 /* necessary. Each renderer supports a given glyph image format, and */
371 /* one or more target surface depths. */
372 /* */
373 typedef struct FT_RendererRec_* FT_Renderer;
376 /*************************************************************************/
377 /* */
378 /* <Type> */
379 /* FT_Face */
380 /* */
381 /* <Description> */
382 /* A handle to a given typographic face object. A face object models */
383 /* a given typeface, in a given style. */
384 /* */
385 /* <Note> */
386 /* Each face object also owns a single @FT_GlyphSlot object, as well */
387 /* as one or more @FT_Size objects. */
388 /* */
389 /* Use @FT_New_Face or @FT_Open_Face to create a new face object from */
390 /* a given filepathname or a custom input stream. */
391 /* */
392 /* Use @FT_Done_Face to destroy it (along with its slot and sizes). */
393 /* */
394 /* <Also> */
395 /* See @FT_FaceRec for the publicly accessible fields of a given face */
396 /* object. */
397 /* */
398 typedef struct FT_FaceRec_* FT_Face;
401 /*************************************************************************/
402 /* */
403 /* <Type> */
404 /* FT_Size */
405 /* */
406 /* <Description> */
407 /* A handle to an object used to model a face scaled to a given */
408 /* character size. */
409 /* */
410 /* <Note> */
411 /* Each @FT_Face has an _active_ @FT_Size object that is used by */
412 /* functions like @FT_Load_Glyph to determine the scaling */
413 /* transformation which is used to load and hint glyphs and metrics. */
414 /* */
415 /* You can use @FT_Set_Char_Size, @FT_Set_Pixel_Sizes, */
416 /* @FT_Request_Size or even @FT_Select_Size to change the content */
417 /* (i.e., the scaling values) of the active @FT_Size. */
418 /* */
419 /* You can use @FT_New_Size to create additional size objects for a */
420 /* given @FT_Face, but they won't be used by other functions until */
421 /* you activate it through @FT_Activate_Size. Only one size can be */
422 /* activated at any given time per face. */
423 /* */
424 /* <Also> */
425 /* See @FT_SizeRec for the publicly accessible fields of a given size */
426 /* object. */
427 /* */
428 typedef struct FT_SizeRec_* FT_Size;
431 /*************************************************************************/
432 /* */
433 /* <Type> */
434 /* FT_GlyphSlot */
435 /* */
436 /* <Description> */
437 /* A handle to a given `glyph slot'. A slot is a container where it */
438 /* is possible to load any of the glyphs contained in its parent */
439 /* face. */
440 /* */
441 /* In other words, each time you call @FT_Load_Glyph or */
442 /* @FT_Load_Char, the slot's content is erased by the new glyph data, */
443 /* i.e., the glyph's metrics, its image (bitmap or outline), and */
444 /* other control information. */
445 /* */
446 /* <Also> */
447 /* See @FT_GlyphSlotRec for the publicly accessible glyph fields. */
448 /* */
449 typedef struct FT_GlyphSlotRec_* FT_GlyphSlot;
452 /*************************************************************************/
453 /* */
454 /* <Type> */
455 /* FT_CharMap */
456 /* */
457 /* <Description> */
458 /* A handle to a given character map. A charmap is used to translate */
459 /* character codes in a given encoding into glyph indexes for its */
460 /* parent's face. Some font formats may provide several charmaps per */
461 /* font. */
462 /* */
463 /* Each face object owns zero or more charmaps, but only one of them */
464 /* can be `active' and used by @FT_Get_Char_Index or @FT_Load_Char. */
465 /* */
466 /* The list of available charmaps in a face is available through the */
467 /* `face->num_charmaps' and `face->charmaps' fields of @FT_FaceRec. */
468 /* */
469 /* The currently active charmap is available as `face->charmap'. */
470 /* You should call @FT_Set_Charmap to change it. */
471 /* */
472 /* <Note> */
473 /* When a new face is created (either through @FT_New_Face or */
474 /* @FT_Open_Face), the library looks for a Unicode charmap within */
475 /* the list and automatically activates it. */
476 /* */
477 /* <Also> */
478 /* See @FT_CharMapRec for the publicly accessible fields of a given */
479 /* character map. */
480 /* */
481 typedef struct FT_CharMapRec_* FT_CharMap;
484 /*************************************************************************/
485 /* */
486 /* <Macro> */
487 /* FT_ENC_TAG */
488 /* */
489 /* <Description> */
490 /* This macro converts four-letter tags into an unsigned long. It is */
491 /* used to define `encoding' identifiers (see @FT_Encoding). */
492 /* */
493 /* <Note> */
494 /* Since many 16-bit compilers don't like 32-bit enumerations, you */
495 /* should redefine this macro in case of problems to something like */
496 /* this: */
497 /* */
498 /* { */
499 /* #define FT_ENC_TAG( value, a, b, c, d ) value */
500 /* } */
501 /* */
502 /* to get a simple enumeration without assigning special numbers. */
503 /* */
505 #ifndef FT_ENC_TAG
506 #define FT_ENC_TAG( value, a, b, c, d ) \
507 value = ( ( (FT_UInt32)(a) << 24 ) | \
508 ( (FT_UInt32)(b) << 16 ) | \
509 ( (FT_UInt32)(c) << 8 ) | \
510 (FT_UInt32)(d) )
512 #endif /* FT_ENC_TAG */
515 /*************************************************************************/
516 /* */
517 /* <Enum> */
518 /* FT_Encoding */
519 /* */
520 /* <Description> */
521 /* An enumeration used to specify character sets supported by */
522 /* charmaps. Used in the @FT_Select_Charmap API function. */
523 /* */
524 /* <Note> */
525 /* Despite the name, this enumeration lists specific character */
526 /* repertories (i.e., charsets), and not text encoding methods (e.g., */
527 /* UTF-8, UTF-16, etc.). */
528 /* */
529 /* Other encodings might be defined in the future. */
530 /* */
531 /* <Values> */
532 /* FT_ENCODING_NONE :: */
533 /* The encoding value~0 is reserved. */
534 /* */
535 /* FT_ENCODING_UNICODE :: */
536 /* Corresponds to the Unicode character set. This value covers */
537 /* all versions of the Unicode repertoire, including ASCII and */
538 /* Latin-1. Most fonts include a Unicode charmap, but not all */
539 /* of them. */
540 /* */
541 /* For example, if you want to access Unicode value U+1F028 (and */
542 /* the font contains it), use value 0x1F028 as the input value for */
543 /* @FT_Get_Char_Index. */
544 /* */
545 /* FT_ENCODING_MS_SYMBOL :: */
546 /* Corresponds to the Microsoft Symbol encoding, used to encode */
547 /* mathematical symbols in the 32..255 character code range. For */
548 /* more information, see `http://www.ceviz.net/symbol.htm'. */
549 /* */
550 /* FT_ENCODING_SJIS :: */
551 /* Corresponds to Japanese SJIS encoding. More info at */
552 /* at `http://langsupport.japanreference.com/encoding.shtml'. */
553 /* See note on multi-byte encodings below. */
554 /* */
555 /* FT_ENCODING_GB2312 :: */
556 /* Corresponds to an encoding system for Simplified Chinese as used */
557 /* used in mainland China. */
558 /* */
559 /* FT_ENCODING_BIG5 :: */
560 /* Corresponds to an encoding system for Traditional Chinese as */
561 /* used in Taiwan and Hong Kong. */
562 /* */
563 /* FT_ENCODING_WANSUNG :: */
564 /* Corresponds to the Korean encoding system known as Wansung. */
565 /* For more information see */
566 /* `http://www.microsoft.com/typography/unicode/949.txt'. */
567 /* */
568 /* FT_ENCODING_JOHAB :: */
569 /* The Korean standard character set (KS~C 5601-1992), which */
570 /* corresponds to MS Windows code page 1361. This character set */
571 /* includes all possible Hangeul character combinations. */
572 /* */
573 /* FT_ENCODING_ADOBE_LATIN_1 :: */
574 /* Corresponds to a Latin-1 encoding as defined in a Type~1 */
575 /* PostScript font. It is limited to 256 character codes. */
576 /* */
577 /* FT_ENCODING_ADOBE_STANDARD :: */
578 /* Corresponds to the Adobe Standard encoding, as found in Type~1, */
579 /* CFF, and OpenType/CFF fonts. It is limited to 256 character */
580 /* codes. */
581 /* */
582 /* FT_ENCODING_ADOBE_EXPERT :: */
583 /* Corresponds to the Adobe Expert encoding, as found in Type~1, */
584 /* CFF, and OpenType/CFF fonts. It is limited to 256 character */
585 /* codes. */
586 /* */
587 /* FT_ENCODING_ADOBE_CUSTOM :: */
588 /* Corresponds to a custom encoding, as found in Type~1, CFF, and */
589 /* OpenType/CFF fonts. It is limited to 256 character codes. */
590 /* */
591 /* FT_ENCODING_APPLE_ROMAN :: */
592 /* Corresponds to the 8-bit Apple roman encoding. Many TrueType */
593 /* and OpenType fonts contain a charmap for this encoding, since */
594 /* older versions of Mac OS are able to use it. */
595 /* */
596 /* FT_ENCODING_OLD_LATIN_2 :: */
597 /* This value is deprecated and was never used nor reported by */
598 /* FreeType. Don't use or test for it. */
599 /* */
600 /* FT_ENCODING_MS_SJIS :: */
601 /* Same as FT_ENCODING_SJIS. Deprecated. */
602 /* */
603 /* FT_ENCODING_MS_GB2312 :: */
604 /* Same as FT_ENCODING_GB2312. Deprecated. */
605 /* */
606 /* FT_ENCODING_MS_BIG5 :: */
607 /* Same as FT_ENCODING_BIG5. Deprecated. */
608 /* */
609 /* FT_ENCODING_MS_WANSUNG :: */
610 /* Same as FT_ENCODING_WANSUNG. Deprecated. */
611 /* */
612 /* FT_ENCODING_MS_JOHAB :: */
613 /* Same as FT_ENCODING_JOHAB. Deprecated. */
614 /* */
615 /* <Note> */
616 /* By default, FreeType automatically synthesizes a Unicode charmap */
617 /* for PostScript fonts, using their glyph names dictionaries. */
618 /* However, it also reports the encodings defined explicitly in the */
619 /* font file, for the cases when they are needed, with the Adobe */
620 /* values as well. */
621 /* */
622 /* FT_ENCODING_NONE is set by the BDF and PCF drivers if the charmap */
623 /* is neither Unicode nor ISO-8859-1 (otherwise it is set to */
624 /* FT_ENCODING_UNICODE). Use @FT_Get_BDF_Charset_ID to find out */
625 /* which encoding is really present. If, for example, the */
626 /* `cs_registry' field is `KOI8' and the `cs_encoding' field is `R', */
627 /* the font is encoded in KOI8-R. */
628 /* */
629 /* FT_ENCODING_NONE is always set (with a single exception) by the */
630 /* winfonts driver. Use @FT_Get_WinFNT_Header and examine the */
631 /* `charset' field of the @FT_WinFNT_HeaderRec structure to find out */
632 /* which encoding is really present. For example, */
633 /* @FT_WinFNT_ID_CP1251 (204) means Windows code page 1251 (for */
634 /* Russian). */
635 /* */
636 /* FT_ENCODING_NONE is set if `platform_id' is @TT_PLATFORM_MACINTOSH */
637 /* and `encoding_id' is not @TT_MAC_ID_ROMAN (otherwise it is set to */
638 /* FT_ENCODING_APPLE_ROMAN). */
639 /* */
640 /* If `platform_id' is @TT_PLATFORM_MACINTOSH, use the function */
641 /* @FT_Get_CMap_Language_ID to query the Mac language ID which may */
642 /* be needed to be able to distinguish Apple encoding variants. See */
643 /* */
644 /* http://www.unicode.org/Public/MAPPINGS/VENDORS/APPLE/README.TXT */
645 /* */
646 /* to get an idea how to do that. Basically, if the language ID */
647 /* is~0, don't use it, otherwise subtract 1 from the language ID. */
648 /* Then examine `encoding_id'. If, for example, `encoding_id' is */
649 /* @TT_MAC_ID_ROMAN and the language ID (minus~1) is */
650 /* `TT_MAC_LANGID_GREEK', it is the Greek encoding, not Roman. */
651 /* @TT_MAC_ID_ARABIC with `TT_MAC_LANGID_FARSI' means the Farsi */
652 /* variant the Arabic encoding. */
653 /* */
654 typedef enum FT_Encoding_
655 {
656 FT_ENC_TAG( FT_ENCODING_NONE, 0, 0, 0, 0 ),
658 FT_ENC_TAG( FT_ENCODING_MS_SYMBOL, 's', 'y', 'm', 'b' ),
659 FT_ENC_TAG( FT_ENCODING_UNICODE, 'u', 'n', 'i', 'c' ),
661 FT_ENC_TAG( FT_ENCODING_SJIS, 's', 'j', 'i', 's' ),
662 FT_ENC_TAG( FT_ENCODING_GB2312, 'g', 'b', ' ', ' ' ),
663 FT_ENC_TAG( FT_ENCODING_BIG5, 'b', 'i', 'g', '5' ),
664 FT_ENC_TAG( FT_ENCODING_WANSUNG, 'w', 'a', 'n', 's' ),
665 FT_ENC_TAG( FT_ENCODING_JOHAB, 'j', 'o', 'h', 'a' ),
667 /* for backwards compatibility */
668 FT_ENCODING_MS_SJIS = FT_ENCODING_SJIS,
669 FT_ENCODING_MS_GB2312 = FT_ENCODING_GB2312,
670 FT_ENCODING_MS_BIG5 = FT_ENCODING_BIG5,
671 FT_ENCODING_MS_WANSUNG = FT_ENCODING_WANSUNG,
672 FT_ENCODING_MS_JOHAB = FT_ENCODING_JOHAB,
674 FT_ENC_TAG( FT_ENCODING_ADOBE_STANDARD, 'A', 'D', 'O', 'B' ),
675 FT_ENC_TAG( FT_ENCODING_ADOBE_EXPERT, 'A', 'D', 'B', 'E' ),
676 FT_ENC_TAG( FT_ENCODING_ADOBE_CUSTOM, 'A', 'D', 'B', 'C' ),
677 FT_ENC_TAG( FT_ENCODING_ADOBE_LATIN_1, 'l', 'a', 't', '1' ),
679 FT_ENC_TAG( FT_ENCODING_OLD_LATIN_2, 'l', 'a', 't', '2' ),
681 FT_ENC_TAG( FT_ENCODING_APPLE_ROMAN, 'a', 'r', 'm', 'n' )
683 } FT_Encoding;
686 /*************************************************************************/
687 /* */
688 /* <Enum> */
689 /* ft_encoding_xxx */
690 /* */
691 /* <Description> */
692 /* These constants are deprecated; use the corresponding @FT_Encoding */
693 /* values instead. */
694 /* */
695 #define ft_encoding_none FT_ENCODING_NONE
696 #define ft_encoding_unicode FT_ENCODING_UNICODE
697 #define ft_encoding_symbol FT_ENCODING_MS_SYMBOL
698 #define ft_encoding_latin_1 FT_ENCODING_ADOBE_LATIN_1
699 #define ft_encoding_latin_2 FT_ENCODING_OLD_LATIN_2
700 #define ft_encoding_sjis FT_ENCODING_SJIS
701 #define ft_encoding_gb2312 FT_ENCODING_GB2312
702 #define ft_encoding_big5 FT_ENCODING_BIG5
703 #define ft_encoding_wansung FT_ENCODING_WANSUNG
704 #define ft_encoding_johab FT_ENCODING_JOHAB
706 #define ft_encoding_adobe_standard FT_ENCODING_ADOBE_STANDARD
707 #define ft_encoding_adobe_expert FT_ENCODING_ADOBE_EXPERT
708 #define ft_encoding_adobe_custom FT_ENCODING_ADOBE_CUSTOM
709 #define ft_encoding_apple_roman FT_ENCODING_APPLE_ROMAN
712 /*************************************************************************/
713 /* */
714 /* <Struct> */
715 /* FT_CharMapRec */
716 /* */
717 /* <Description> */
718 /* The base charmap structure. */
719 /* */
720 /* <Fields> */
721 /* face :: A handle to the parent face object. */
722 /* */
723 /* encoding :: An @FT_Encoding tag identifying the charmap. Use */
724 /* this with @FT_Select_Charmap. */
725 /* */
726 /* platform_id :: An ID number describing the platform for the */
727 /* following encoding ID. This comes directly from */
728 /* the TrueType specification and should be emulated */
729 /* for other formats. */
730 /* */
731 /* encoding_id :: A platform specific encoding number. This also */
732 /* comes from the TrueType specification and should be */
733 /* emulated similarly. */
734 /* */
735 typedef struct FT_CharMapRec_
736 {
737 FT_Face face;
738 FT_Encoding encoding;
739 FT_UShort platform_id;
740 FT_UShort encoding_id;
742 } FT_CharMapRec;
745 /*************************************************************************/
746 /*************************************************************************/
747 /* */
748 /* B A S E O B J E C T C L A S S E S */
749 /* */
750 /*************************************************************************/
751 /*************************************************************************/
754 /*************************************************************************/
755 /* */
756 /* <Type> */
757 /* FT_Face_Internal */
758 /* */
759 /* <Description> */
760 /* An opaque handle to an `FT_Face_InternalRec' structure, used to */
761 /* model private data of a given @FT_Face object. */
762 /* */
763 /* This structure might change between releases of FreeType~2 and is */
764 /* not generally available to client applications. */
765 /* */
766 typedef struct FT_Face_InternalRec_* FT_Face_Internal;
769 /*************************************************************************/
770 /* */
771 /* <Struct> */
772 /* FT_FaceRec */
773 /* */
774 /* <Description> */
775 /* FreeType root face class structure. A face object models a */
776 /* typeface in a font file. */
777 /* */
778 /* <Fields> */
779 /* num_faces :: The number of faces in the font file. Some */
780 /* font formats can have multiple faces in */
781 /* a font file. */
782 /* */
783 /* face_index :: The index of the face in the font file. It */
784 /* is set to~0 if there is only one face in */
785 /* the font file. */
786 /* */
787 /* face_flags :: A set of bit flags that give important */
788 /* information about the face; see */
789 /* @FT_FACE_FLAG_XXX for the details. */
790 /* */
791 /* style_flags :: A set of bit flags indicating the style of */
792 /* the face; see @FT_STYLE_FLAG_XXX for the */
793 /* details. */
794 /* */
795 /* num_glyphs :: The number of glyphs in the face. If the */
796 /* face is scalable and has sbits (see */
797 /* `num_fixed_sizes'), it is set to the number */
798 /* of outline glyphs. */
799 /* */
800 /* For CID-keyed fonts, this value gives the */
801 /* highest CID used in the font. */
802 /* */
803 /* family_name :: The face's family name. This is an ASCII */
804 /* string, usually in English, which describes */
805 /* the typeface's family (like `Times New */
806 /* Roman', `Bodoni', `Garamond', etc). This */
807 /* is a least common denominator used to list */
808 /* fonts. Some formats (TrueType & OpenType) */
809 /* provide localized and Unicode versions of */
810 /* this string. Applications should use the */
811 /* format specific interface to access them. */
812 /* Can be NULL (e.g., in fonts embedded in a */
813 /* PDF file). */
814 /* */
815 /* style_name :: The face's style name. This is an ASCII */
816 /* string, usually in English, which describes */
817 /* the typeface's style (like `Italic', */
818 /* `Bold', `Condensed', etc). Not all font */
819 /* formats provide a style name, so this field */
820 /* is optional, and can be set to NULL. As */
821 /* for `family_name', some formats provide */
822 /* localized and Unicode versions of this */
823 /* string. Applications should use the format */
824 /* specific interface to access them. */
825 /* */
826 /* num_fixed_sizes :: The number of bitmap strikes in the face. */
827 /* Even if the face is scalable, there might */
828 /* still be bitmap strikes, which are called */
829 /* `sbits' in that case. */
830 /* */
831 /* available_sizes :: An array of @FT_Bitmap_Size for all bitmap */
832 /* strikes in the face. It is set to NULL if */
833 /* there is no bitmap strike. */
834 /* */
835 /* num_charmaps :: The number of charmaps in the face. */
836 /* */
837 /* charmaps :: An array of the charmaps of the face. */
838 /* */
839 /* generic :: A field reserved for client uses. See the */
840 /* @FT_Generic type description. */
841 /* */
842 /* bbox :: The font bounding box. Coordinates are */
843 /* expressed in font units (see */
844 /* `units_per_EM'). The box is large enough */
845 /* to contain any glyph from the font. Thus, */
846 /* `bbox.yMax' can be seen as the `maximal */
847 /* ascender', and `bbox.yMin' as the `minimal */
848 /* descender'. Only relevant for scalable */
849 /* formats. */
850 /* */
851 /* Note that the bounding box might be off by */
852 /* (at least) one pixel for hinted fonts. See */
853 /* @FT_Size_Metrics for further discussion. */
854 /* */
855 /* units_per_EM :: The number of font units per EM square for */
856 /* this face. This is typically 2048 for */
857 /* TrueType fonts, and 1000 for Type~1 fonts. */
858 /* Only relevant for scalable formats. */
859 /* */
860 /* ascender :: The typographic ascender of the face, */
861 /* expressed in font units. For font formats */
862 /* not having this information, it is set to */
863 /* `bbox.yMax'. Only relevant for scalable */
864 /* formats. */
865 /* */
866 /* descender :: The typographic descender of the face, */
867 /* expressed in font units. For font formats */
868 /* not having this information, it is set to */
869 /* `bbox.yMin'. Note that this field is */
870 /* usually negative. Only relevant for */
871 /* scalable formats. */
872 /* */
873 /* height :: The height is the vertical distance */
874 /* between two consecutive baselines, */
875 /* expressed in font units. It is always */
876 /* positive. Only relevant for scalable */
877 /* formats. */
878 /* */
879 /* max_advance_width :: The maximal advance width, in font units, */
880 /* for all glyphs in this face. This can be */
881 /* used to make word wrapping computations */
882 /* faster. Only relevant for scalable */
883 /* formats. */
884 /* */
885 /* max_advance_height :: The maximal advance height, in font units, */
886 /* for all glyphs in this face. This is only */
887 /* relevant for vertical layouts, and is set */
888 /* to `height' for fonts that do not provide */
889 /* vertical metrics. Only relevant for */
890 /* scalable formats. */
891 /* */
892 /* underline_position :: The position, in font units, of the */
893 /* underline line for this face. It is the */
894 /* center of the underlining stem. Only */
895 /* relevant for scalable formats. */
896 /* */
897 /* underline_thickness :: The thickness, in font units, of the */
898 /* underline for this face. Only relevant for */
899 /* scalable formats. */
900 /* */
901 /* glyph :: The face's associated glyph slot(s). */
902 /* */
903 /* size :: The current active size for this face. */
904 /* */
905 /* charmap :: The current active charmap for this face. */
906 /* */
907 /* <Note> */
908 /* Fields may be changed after a call to @FT_Attach_File or */
909 /* @FT_Attach_Stream. */
910 /* */
911 typedef struct FT_FaceRec_
912 {
913 FT_Long num_faces;
914 FT_Long face_index;
916 FT_Long face_flags;
917 FT_Long style_flags;
919 FT_Long num_glyphs;
921 FT_String* family_name;
922 FT_String* style_name;
924 FT_Int num_fixed_sizes;
925 FT_Bitmap_Size* available_sizes;
927 FT_Int num_charmaps;
928 FT_CharMap* charmaps;
930 FT_Generic generic;
932 /*# The following member variables (down to `underline_thickness') */
933 /*# are only relevant to scalable outlines; cf. @FT_Bitmap_Size */
934 /*# for bitmap fonts. */
935 FT_BBox bbox;
937 FT_UShort units_per_EM;
938 FT_Short ascender;
939 FT_Short descender;
940 FT_Short height;
942 FT_Short max_advance_width;
943 FT_Short max_advance_height;
945 FT_Short underline_position;
946 FT_Short underline_thickness;
948 FT_GlyphSlot glyph;
949 FT_Size size;
950 FT_CharMap charmap;
952 /*@private begin */
954 FT_Driver driver;
955 FT_Memory memory;
956 FT_Stream stream;
958 FT_ListRec sizes_list;
960 FT_Generic autohint;
961 void* extensions;
963 FT_Face_Internal internal;
965 /*@private end */
967 } FT_FaceRec;
970 /*************************************************************************/
971 /* */
972 /* <Enum> */
973 /* FT_FACE_FLAG_XXX */
974 /* */
975 /* <Description> */
976 /* A list of bit flags used in the `face_flags' field of the */
977 /* @FT_FaceRec structure. They inform client applications of */
978 /* properties of the corresponding face. */
979 /* */
980 /* <Values> */
981 /* FT_FACE_FLAG_SCALABLE :: */
982 /* Indicates that the face contains outline glyphs. This doesn't */
983 /* prevent bitmap strikes, i.e., a face can have both this and */
984 /* and @FT_FACE_FLAG_FIXED_SIZES set. */
985 /* */
986 /* FT_FACE_FLAG_FIXED_SIZES :: */
987 /* Indicates that the face contains bitmap strikes. See also the */
988 /* `num_fixed_sizes' and `available_sizes' fields of @FT_FaceRec. */
989 /* */
990 /* FT_FACE_FLAG_FIXED_WIDTH :: */
991 /* Indicates that the face contains fixed-width characters (like */
992 /* Courier, Lucido, MonoType, etc.). */
993 /* */
994 /* FT_FACE_FLAG_SFNT :: */
995 /* Indicates that the face uses the `sfnt' storage scheme. For */
996 /* now, this means TrueType and OpenType. */
997 /* */
998 /* FT_FACE_FLAG_HORIZONTAL :: */
999 /* Indicates that the face contains horizontal glyph metrics. This */
1000 /* should be set for all common formats. */
1001 /* */
1002 /* FT_FACE_FLAG_VERTICAL :: */
1003 /* Indicates that the face contains vertical glyph metrics. This */
1004 /* is only available in some formats, not all of them. */
1005 /* */
1006 /* FT_FACE_FLAG_KERNING :: */
1007 /* Indicates that the face contains kerning information. If set, */
1008 /* the kerning distance can be retrieved through the function */
1009 /* @FT_Get_Kerning. Otherwise the function always return the */
1010 /* vector (0,0). Note that FreeType doesn't handle kerning data */
1011 /* from the `GPOS' table (as present in some OpenType fonts). */
1012 /* */
1013 /* FT_FACE_FLAG_FAST_GLYPHS :: */
1014 /* THIS FLAG IS DEPRECATED. DO NOT USE OR TEST IT. */
1015 /* */
1016 /* FT_FACE_FLAG_MULTIPLE_MASTERS :: */
1017 /* Indicates that the font contains multiple masters and is capable */
1018 /* of interpolating between them. See the multiple-masters */
1019 /* specific API for details. */
1020 /* */
1021 /* FT_FACE_FLAG_GLYPH_NAMES :: */
1022 /* Indicates that the font contains glyph names that can be */
1023 /* retrieved through @FT_Get_Glyph_Name. Note that some TrueType */
1024 /* fonts contain broken glyph name tables. Use the function */
1025 /* @FT_Has_PS_Glyph_Names when needed. */
1026 /* */
1027 /* FT_FACE_FLAG_EXTERNAL_STREAM :: */
1028 /* Used internally by FreeType to indicate that a face's stream was */
1029 /* provided by the client application and should not be destroyed */
1030 /* when @FT_Done_Face is called. Don't read or test this flag. */
1031 /* */
1032 /* FT_FACE_FLAG_HINTER :: */
1033 /* Set if the font driver has a hinting machine of its own. For */
1034 /* example, with TrueType fonts, it makes sense to use data from */
1035 /* the SFNT `gasp' table only if the native TrueType hinting engine */
1036 /* (with the bytecode interpreter) is available and active. */
1037 /* */
1038 /* FT_FACE_FLAG_CID_KEYED :: */
1039 /* Set if the font is CID-keyed. In that case, the font is not */
1040 /* accessed by glyph indices but by CID values. For subsetted */
1041 /* CID-keyed fonts this has the consequence that not all index */
1042 /* values are a valid argument to FT_Load_Glyph. Only the CID */
1043 /* values for which corresponding glyphs in the subsetted font */
1044 /* exist make FT_Load_Glyph return successfully; in all other cases */
1045 /* you get an `FT_Err_Invalid_Argument' error. */
1046 /* */
1047 /* Note that CID-keyed fonts which are in an SFNT wrapper don't */
1048 /* have this flag set since the glyphs are accessed in the normal */
1049 /* way (using contiguous indices); the `CID-ness' isn't visible to */
1050 /* the application. */
1051 /* */
1052 /* FT_FACE_FLAG_TRICKY :: */
1053 /* Set if the font is `tricky', this is, it always needs the */
1054 /* font format's native hinting engine to get a reasonable result. */
1055 /* A typical example is the Chinese font `mingli.ttf' which uses */
1056 /* TrueType bytecode instructions to move and scale all of its */
1057 /* subglyphs. */
1058 /* */
1059 /* It is not possible to autohint such fonts using */
1060 /* @FT_LOAD_FORCE_AUTOHINT; it will also ignore */
1061 /* @FT_LOAD_NO_HINTING. You have to set both FT_LOAD_NO_HINTING */
1062 /* and @FT_LOAD_NO_AUTOHINT to really disable hinting; however, you */
1063 /* probably never want this except for demonstration purposes. */
1064 /* */
1065 /* Currently, there are six TrueType fonts in the list of tricky */
1066 /* fonts; they are hard-coded in file `ttobjs.c'. */
1067 /* */
1068 #define FT_FACE_FLAG_SCALABLE ( 1L << 0 )
1069 #define FT_FACE_FLAG_FIXED_SIZES ( 1L << 1 )
1070 #define FT_FACE_FLAG_FIXED_WIDTH ( 1L << 2 )
1071 #define FT_FACE_FLAG_SFNT ( 1L << 3 )
1072 #define FT_FACE_FLAG_HORIZONTAL ( 1L << 4 )
1073 #define FT_FACE_FLAG_VERTICAL ( 1L << 5 )
1074 #define FT_FACE_FLAG_KERNING ( 1L << 6 )
1075 #define FT_FACE_FLAG_FAST_GLYPHS ( 1L << 7 )
1076 #define FT_FACE_FLAG_MULTIPLE_MASTERS ( 1L << 8 )
1077 #define FT_FACE_FLAG_GLYPH_NAMES ( 1L << 9 )
1078 #define FT_FACE_FLAG_EXTERNAL_STREAM ( 1L << 10 )
1079 #define FT_FACE_FLAG_HINTER ( 1L << 11 )
1080 #define FT_FACE_FLAG_CID_KEYED ( 1L << 12 )
1081 #define FT_FACE_FLAG_TRICKY ( 1L << 13 )
1084 /*************************************************************************
1085 *
1086 * @macro:
1087 * FT_HAS_HORIZONTAL( face )
1088 *
1089 * @description:
1090 * A macro that returns true whenever a face object contains
1091 * horizontal metrics (this is true for all font formats though).
1092 *
1093 * @also:
1094 * @FT_HAS_VERTICAL can be used to check for vertical metrics.
1095 *
1096 */
1097 #define FT_HAS_HORIZONTAL( face ) \
1098 ( face->face_flags & FT_FACE_FLAG_HORIZONTAL )
1101 /*************************************************************************
1102 *
1103 * @macro:
1104 * FT_HAS_VERTICAL( face )
1105 *
1106 * @description:
1107 * A macro that returns true whenever a face object contains vertical
1108 * metrics.
1109 *
1110 */
1111 #define FT_HAS_VERTICAL( face ) \
1112 ( face->face_flags & FT_FACE_FLAG_VERTICAL )
1115 /*************************************************************************
1116 *
1117 * @macro:
1118 * FT_HAS_KERNING( face )
1119 *
1120 * @description:
1121 * A macro that returns true whenever a face object contains kerning
1122 * data that can be accessed with @FT_Get_Kerning.
1123 *
1124 */
1125 #define FT_HAS_KERNING( face ) \
1126 ( face->face_flags & FT_FACE_FLAG_KERNING )
1129 /*************************************************************************
1130 *
1131 * @macro:
1132 * FT_IS_SCALABLE( face )
1133 *
1134 * @description:
1135 * A macro that returns true whenever a face object contains a scalable
1136 * font face (true for TrueType, Type~1, Type~42, CID, OpenType/CFF,
1137 * and PFR font formats.
1138 *
1139 */
1140 #define FT_IS_SCALABLE( face ) \
1141 ( face->face_flags & FT_FACE_FLAG_SCALABLE )
1144 /*************************************************************************
1145 *
1146 * @macro:
1147 * FT_IS_SFNT( face )
1148 *
1149 * @description:
1150 * A macro that returns true whenever a face object contains a font
1151 * whose format is based on the SFNT storage scheme. This usually
1152 * means: TrueType fonts, OpenType fonts, as well as SFNT-based embedded
1153 * bitmap fonts.
1154 *
1155 * If this macro is true, all functions defined in @FT_SFNT_NAMES_H and
1156 * @FT_TRUETYPE_TABLES_H are available.
1157 *
1158 */
1159 #define FT_IS_SFNT( face ) \
1160 ( face->face_flags & FT_FACE_FLAG_SFNT )
1163 /*************************************************************************
1164 *
1165 * @macro:
1166 * FT_IS_FIXED_WIDTH( face )
1167 *
1168 * @description:
1169 * A macro that returns true whenever a face object contains a font face
1170 * that contains fixed-width (or `monospace', `fixed-pitch', etc.)
1171 * glyphs.
1172 *
1173 */
1174 #define FT_IS_FIXED_WIDTH( face ) \
1175 ( face->face_flags & FT_FACE_FLAG_FIXED_WIDTH )
1178 /*************************************************************************
1179 *
1180 * @macro:
1181 * FT_HAS_FIXED_SIZES( face )
1182 *
1183 * @description:
1184 * A macro that returns true whenever a face object contains some
1185 * embedded bitmaps. See the `available_sizes' field of the
1186 * @FT_FaceRec structure.
1187 *
1188 */
1189 #define FT_HAS_FIXED_SIZES( face ) \
1190 ( face->face_flags & FT_FACE_FLAG_FIXED_SIZES )
1193 /*************************************************************************
1194 *
1195 * @macro:
1196 * FT_HAS_FAST_GLYPHS( face )
1197 *
1198 * @description:
1199 * Deprecated.
1200 *
1201 */
1202 #define FT_HAS_FAST_GLYPHS( face ) 0
1205 /*************************************************************************
1206 *
1207 * @macro:
1208 * FT_HAS_GLYPH_NAMES( face )
1209 *
1210 * @description:
1211 * A macro that returns true whenever a face object contains some glyph
1212 * names that can be accessed through @FT_Get_Glyph_Name.
1213 *
1214 */
1215 #define FT_HAS_GLYPH_NAMES( face ) \
1216 ( face->face_flags & FT_FACE_FLAG_GLYPH_NAMES )
1219 /*************************************************************************
1220 *
1221 * @macro:
1222 * FT_HAS_MULTIPLE_MASTERS( face )
1223 *
1224 * @description:
1225 * A macro that returns true whenever a face object contains some
1226 * multiple masters. The functions provided by @FT_MULTIPLE_MASTERS_H
1227 * are then available to choose the exact design you want.
1228 *
1229 */
1230 #define FT_HAS_MULTIPLE_MASTERS( face ) \
1231 ( face->face_flags & FT_FACE_FLAG_MULTIPLE_MASTERS )
1234 /*************************************************************************
1235 *
1236 * @macro:
1237 * FT_IS_CID_KEYED( face )
1238 *
1239 * @description:
1240 * A macro that returns true whenever a face object contains a CID-keyed
1241 * font. See the discussion of @FT_FACE_FLAG_CID_KEYED for more
1242 * details.
1243 *
1244 * If this macro is true, all functions defined in @FT_CID_H are
1245 * available.
1246 *
1247 */
1248 #define FT_IS_CID_KEYED( face ) \
1249 ( face->face_flags & FT_FACE_FLAG_CID_KEYED )
1252 /*************************************************************************
1253 *
1254 * @macro:
1255 * FT_IS_TRICKY( face )
1256 *
1257 * @description:
1258 * A macro that returns true whenever a face represents a `tricky' font.
1259 * See the discussion of @FT_FACE_FLAG_TRICKY for more details.
1260 *
1261 */
1262 #define FT_IS_TRICKY( face ) \
1263 ( face->face_flags & FT_FACE_FLAG_TRICKY )
1266 /*************************************************************************/
1267 /* */
1268 /* <Const> */
1269 /* FT_STYLE_FLAG_XXX */
1270 /* */
1271 /* <Description> */
1272 /* A list of bit-flags used to indicate the style of a given face. */
1273 /* These are used in the `style_flags' field of @FT_FaceRec. */
1274 /* */
1275 /* <Values> */
1276 /* FT_STYLE_FLAG_ITALIC :: */
1277 /* Indicates that a given face style is italic or oblique. */
1278 /* */
1279 /* FT_STYLE_FLAG_BOLD :: */
1280 /* Indicates that a given face is bold. */
1281 /* */
1282 /* <Note> */
1283 /* The style information as provided by FreeType is very basic. More */
1284 /* details are beyond the scope and should be done on a higher level */
1285 /* (for example, by analyzing various fields of the `OS/2' table in */
1286 /* SFNT based fonts). */
1287 /* */
1288 #define FT_STYLE_FLAG_ITALIC ( 1 << 0 )
1289 #define FT_STYLE_FLAG_BOLD ( 1 << 1 )
1292 /*************************************************************************/
1293 /* */
1294 /* <Type> */
1295 /* FT_Size_Internal */
1296 /* */
1297 /* <Description> */
1298 /* An opaque handle to an `FT_Size_InternalRec' structure, used to */
1299 /* model private data of a given @FT_Size object. */
1300 /* */
1301 typedef struct FT_Size_InternalRec_* FT_Size_Internal;
1304 /*************************************************************************/
1305 /* */
1306 /* <Struct> */
1307 /* FT_Size_Metrics */
1308 /* */
1309 /* <Description> */
1310 /* The size metrics structure gives the metrics of a size object. */
1311 /* */
1312 /* <Fields> */
1313 /* x_ppem :: The width of the scaled EM square in pixels, hence */
1314 /* the term `ppem' (pixels per EM). It is also */
1315 /* referred to as `nominal width'. */
1316 /* */
1317 /* y_ppem :: The height of the scaled EM square in pixels, */
1318 /* hence the term `ppem' (pixels per EM). It is also */
1319 /* referred to as `nominal height'. */
1320 /* */
1321 /* x_scale :: A 16.16 fractional scaling value used to convert */
1322 /* horizontal metrics from font units to 26.6 */
1323 /* fractional pixels. Only relevant for scalable */
1324 /* font formats. */
1325 /* */
1326 /* y_scale :: A 16.16 fractional scaling value used to convert */
1327 /* vertical metrics from font units to 26.6 */
1328 /* fractional pixels. Only relevant for scalable */
1329 /* font formats. */
1330 /* */
1331 /* ascender :: The ascender in 26.6 fractional pixels. See */
1332 /* @FT_FaceRec for the details. */
1333 /* */
1334 /* descender :: The descender in 26.6 fractional pixels. See */
1335 /* @FT_FaceRec for the details. */
1336 /* */
1337 /* height :: The height in 26.6 fractional pixels. See */
1338 /* @FT_FaceRec for the details. */
1339 /* */
1340 /* max_advance :: The maximal advance width in 26.6 fractional */
1341 /* pixels. See @FT_FaceRec for the details. */
1342 /* */
1343 /* <Note> */
1344 /* The scaling values, if relevant, are determined first during a */
1345 /* size changing operation. The remaining fields are then set by the */
1346 /* driver. For scalable formats, they are usually set to scaled */
1347 /* values of the corresponding fields in @FT_FaceRec. */
1348 /* */
1349 /* Note that due to glyph hinting, these values might not be exact */
1350 /* for certain fonts. Thus they must be treated as unreliable */
1351 /* with an error margin of at least one pixel! */
1352 /* */
1353 /* Indeed, the only way to get the exact metrics is to render _all_ */
1354 /* glyphs. As this would be a definite performance hit, it is up to */
1355 /* client applications to perform such computations. */
1356 /* */
1357 /* The FT_Size_Metrics structure is valid for bitmap fonts also. */
1358 /* */
1359 typedef struct FT_Size_Metrics_
1360 {
1361 FT_UShort x_ppem; /* horizontal pixels per EM */
1362 FT_UShort y_ppem; /* vertical pixels per EM */
1364 FT_Fixed x_scale; /* scaling values used to convert font */
1365 FT_Fixed y_scale; /* units to 26.6 fractional pixels */
1367 FT_Pos ascender; /* ascender in 26.6 frac. pixels */
1368 FT_Pos descender; /* descender in 26.6 frac. pixels */
1369 FT_Pos height; /* text height in 26.6 frac. pixels */
1370 FT_Pos max_advance; /* max horizontal advance, in 26.6 pixels */
1372 } FT_Size_Metrics;
1375 /*************************************************************************/
1376 /* */
1377 /* <Struct> */
1378 /* FT_SizeRec */
1379 /* */
1380 /* <Description> */
1381 /* FreeType root size class structure. A size object models a face */
1382 /* object at a given size. */
1383 /* */
1384 /* <Fields> */
1385 /* face :: Handle to the parent face object. */
1386 /* */
1387 /* generic :: A typeless pointer, which is unused by the FreeType */
1388 /* library or any of its drivers. It can be used by */
1389 /* client applications to link their own data to each size */
1390 /* object. */
1391 /* */
1392 /* metrics :: Metrics for this size object. This field is read-only. */
1393 /* */
1394 typedef struct FT_SizeRec_
1395 {
1396 FT_Face face; /* parent face object */
1397 FT_Generic generic; /* generic pointer for client uses */
1398 FT_Size_Metrics metrics; /* size metrics */
1399 FT_Size_Internal internal;
1401 } FT_SizeRec;
1404 /*************************************************************************/
1405 /* */
1406 /* <Struct> */
1407 /* FT_SubGlyph */
1408 /* */
1409 /* <Description> */
1410 /* The subglyph structure is an internal object used to describe */
1411 /* subglyphs (for example, in the case of composites). */
1412 /* */
1413 /* <Note> */
1414 /* The subglyph implementation is not part of the high-level API, */
1415 /* hence the forward structure declaration. */
1416 /* */
1417 /* You can however retrieve subglyph information with */
1418 /* @FT_Get_SubGlyph_Info. */
1419 /* */
1420 typedef struct FT_SubGlyphRec_* FT_SubGlyph;
1423 /*************************************************************************/
1424 /* */
1425 /* <Type> */
1426 /* FT_Slot_Internal */
1427 /* */
1428 /* <Description> */
1429 /* An opaque handle to an `FT_Slot_InternalRec' structure, used to */
1430 /* model private data of a given @FT_GlyphSlot object. */
1431 /* */
1432 typedef struct FT_Slot_InternalRec_* FT_Slot_Internal;
1435 /*************************************************************************/
1436 /* */
1437 /* <Struct> */
1438 /* FT_GlyphSlotRec */
1439 /* */
1440 /* <Description> */
1441 /* FreeType root glyph slot class structure. A glyph slot is a */
1442 /* container where individual glyphs can be loaded, be they in */
1443 /* outline or bitmap format. */
1444 /* */
1445 /* <Fields> */
1446 /* library :: A handle to the FreeType library instance */
1447 /* this slot belongs to. */
1448 /* */
1449 /* face :: A handle to the parent face object. */
1450 /* */
1451 /* next :: In some cases (like some font tools), several */
1452 /* glyph slots per face object can be a good */
1453 /* thing. As this is rare, the glyph slots are */
1454 /* listed through a direct, single-linked list */
1455 /* using its `next' field. */
1456 /* */
1457 /* generic :: A typeless pointer which is unused by the */
1458 /* FreeType library or any of its drivers. It */
1459 /* can be used by client applications to link */
1460 /* their own data to each glyph slot object. */
1461 /* */
1462 /* metrics :: The metrics of the last loaded glyph in the */
1463 /* slot. The returned values depend on the last */
1464 /* load flags (see the @FT_Load_Glyph API */
1465 /* function) and can be expressed either in 26.6 */
1466 /* fractional pixels or font units. */
1467 /* */
1468 /* Note that even when the glyph image is */
1469 /* transformed, the metrics are not. */
1470 /* */
1471 /* linearHoriAdvance :: The advance width of the unhinted glyph. */
1472 /* Its value is expressed in 16.16 fractional */
1473 /* pixels, unless @FT_LOAD_LINEAR_DESIGN is set */
1474 /* when loading the glyph. This field can be */
1475 /* important to perform correct WYSIWYG layout. */
1476 /* Only relevant for outline glyphs. */
1477 /* */
1478 /* linearVertAdvance :: The advance height of the unhinted glyph. */
1479 /* Its value is expressed in 16.16 fractional */
1480 /* pixels, unless @FT_LOAD_LINEAR_DESIGN is set */
1481 /* when loading the glyph. This field can be */
1482 /* important to perform correct WYSIWYG layout. */
1483 /* Only relevant for outline glyphs. */
1484 /* */
1485 /* advance :: This shorthand is, depending on */
1486 /* @FT_LOAD_IGNORE_TRANSFORM, the transformed */
1487 /* advance width for the glyph (in 26.6 */
1488 /* fractional pixel format). As specified with */
1489 /* @FT_LOAD_VERTICAL_LAYOUT, it uses either the */
1490 /* `horiAdvance' or the `vertAdvance' value of */
1491 /* `metrics' field. */
1492 /* */
1493 /* format :: This field indicates the format of the image */
1494 /* contained in the glyph slot. Typically */
1495 /* @FT_GLYPH_FORMAT_BITMAP, */
1496 /* @FT_GLYPH_FORMAT_OUTLINE, or */
1497 /* @FT_GLYPH_FORMAT_COMPOSITE, but others are */
1498 /* possible. */
1499 /* */
1500 /* bitmap :: This field is used as a bitmap descriptor */
1501 /* when the slot format is */
1502 /* @FT_GLYPH_FORMAT_BITMAP. Note that the */
1503 /* address and content of the bitmap buffer can */
1504 /* change between calls of @FT_Load_Glyph and a */
1505 /* few other functions. */
1506 /* */
1507 /* bitmap_left :: This is the bitmap's left bearing expressed */
1508 /* in integer pixels. Of course, this is only */
1509 /* valid if the format is */
1510 /* @FT_GLYPH_FORMAT_BITMAP. */
1511 /* */
1512 /* bitmap_top :: This is the bitmap's top bearing expressed in */
1513 /* integer pixels. Remember that this is the */
1514 /* distance from the baseline to the top-most */
1515 /* glyph scanline, upwards y~coordinates being */
1516 /* *positive*. */
1517 /* */
1518 /* outline :: The outline descriptor for the current glyph */
1519 /* image if its format is */
1520 /* @FT_GLYPH_FORMAT_OUTLINE. Once a glyph is */
1521 /* loaded, `outline' can be transformed, */
1522 /* distorted, embolded, etc. However, it must */
1523 /* not be freed. */
1524 /* */
1525 /* num_subglyphs :: The number of subglyphs in a composite glyph. */
1526 /* This field is only valid for the composite */
1527 /* glyph format that should normally only be */
1528 /* loaded with the @FT_LOAD_NO_RECURSE flag. */
1529 /* For now this is internal to FreeType. */
1530 /* */
1531 /* subglyphs :: An array of subglyph descriptors for */
1532 /* composite glyphs. There are `num_subglyphs' */
1533 /* elements in there. Currently internal to */
1534 /* FreeType. */
1535 /* */
1536 /* control_data :: Certain font drivers can also return the */
1537 /* control data for a given glyph image (e.g. */
1538 /* TrueType bytecode, Type~1 charstrings, etc.). */
1539 /* This field is a pointer to such data. */
1540 /* */
1541 /* control_len :: This is the length in bytes of the control */
1542 /* data. */
1543 /* */
1544 /* other :: Really wicked formats can use this pointer to */
1545 /* present their own glyph image to client */
1546 /* applications. Note that the application */
1547 /* needs to know about the image format. */
1548 /* */
1549 /* lsb_delta :: The difference between hinted and unhinted */
1550 /* left side bearing while autohinting is */
1551 /* active. Zero otherwise. */
1552 /* */
1553 /* rsb_delta :: The difference between hinted and unhinted */
1554 /* right side bearing while autohinting is */
1555 /* active. Zero otherwise. */
1556 /* */
1557 /* <Note> */
1558 /* If @FT_Load_Glyph is called with default flags (see */
1559 /* @FT_LOAD_DEFAULT) the glyph image is loaded in the glyph slot in */
1560 /* its native format (e.g., an outline glyph for TrueType and Type~1 */
1561 /* formats). */
1562 /* */
1563 /* This image can later be converted into a bitmap by calling */
1564 /* @FT_Render_Glyph. This function finds the current renderer for */
1565 /* the native image's format, then invokes it. */
1566 /* */
1567 /* The renderer is in charge of transforming the native image through */
1568 /* the slot's face transformation fields, then converting it into a */
1569 /* bitmap that is returned in `slot->bitmap'. */
1570 /* */
1571 /* Note that `slot->bitmap_left' and `slot->bitmap_top' are also used */
1572 /* to specify the position of the bitmap relative to the current pen */
1573 /* position (e.g., coordinates (0,0) on the baseline). Of course, */
1574 /* `slot->format' is also changed to @FT_GLYPH_FORMAT_BITMAP. */
1575 /* */
1576 /* <Note> */
1577 /* Here a small pseudo code fragment which shows how to use */
1578 /* `lsb_delta' and `rsb_delta': */
1579 /* */
1580 /* { */
1581 /* FT_Pos origin_x = 0; */
1582 /* FT_Pos prev_rsb_delta = 0; */
1583 /* */
1584 /* */
1585 /* for all glyphs do */
1586 /* <compute kern between current and previous glyph and add it to */
1587 /* `origin_x'> */
1588 /* */
1589 /* <load glyph with `FT_Load_Glyph'> */
1590 /* */
1591 /* if ( prev_rsb_delta - face->glyph->lsb_delta >= 32 ) */
1592 /* origin_x -= 64; */
1593 /* else if ( prev_rsb_delta - face->glyph->lsb_delta < -32 ) */
1594 /* origin_x += 64; */
1595 /* */
1596 /* prev_rsb_delta = face->glyph->rsb_delta; */
1597 /* */
1598 /* <save glyph image, or render glyph, or ...> */
1599 /* */
1600 /* origin_x += face->glyph->advance.x; */
1601 /* endfor */
1602 /* } */
1603 /* */
1604 typedef struct FT_GlyphSlotRec_
1605 {
1606 FT_Library library;
1607 FT_Face face;
1608 FT_GlyphSlot next;
1609 FT_UInt reserved; /* retained for binary compatibility */
1610 FT_Generic generic;
1612 FT_Glyph_Metrics metrics;
1613 FT_Fixed linearHoriAdvance;
1614 FT_Fixed linearVertAdvance;
1615 FT_Vector advance;
1617 FT_Glyph_Format format;
1619 FT_Bitmap bitmap;
1620 FT_Int bitmap_left;
1621 FT_Int bitmap_top;
1623 FT_Outline outline;
1625 FT_UInt num_subglyphs;
1626 FT_SubGlyph subglyphs;
1628 void* control_data;
1629 long control_len;
1631 FT_Pos lsb_delta;
1632 FT_Pos rsb_delta;
1634 void* other;
1636 FT_Slot_Internal internal;
1638 } FT_GlyphSlotRec;
1641 /*************************************************************************/
1642 /*************************************************************************/
1643 /* */
1644 /* F U N C T I O N S */
1645 /* */
1646 /*************************************************************************/
1647 /*************************************************************************/
1650 /*************************************************************************/
1651 /* */
1652 /* <Function> */
1653 /* FT_Init_FreeType */
1654 /* */
1655 /* <Description> */
1656 /* Initialize a new FreeType library object. The set of modules */
1657 /* that are registered by this function is determined at build time. */
1658 /* */
1659 /* <Output> */
1660 /* alibrary :: A handle to a new library object. */
1661 /* */
1662 /* <Return> */
1663 /* FreeType error code. 0~means success. */
1664 /* */
1665 /* <Note> */
1666 /* In case you want to provide your own memory allocating routines, */
1667 /* use @FT_New_Library instead, followed by a call to */
1668 /* @FT_Add_Default_Modules (or a series of calls to @FT_Add_Module). */
1669 /* */
1670 FT_EXPORT( FT_Error )
1671 FT_Init_FreeType( FT_Library *alibrary );
1674 /*************************************************************************/
1675 /* */
1676 /* <Function> */
1677 /* FT_Done_FreeType */
1678 /* */
1679 /* <Description> */
1680 /* Destroy a given FreeType library object and all of its children, */
1681 /* including resources, drivers, faces, sizes, etc. */
1682 /* */
1683 /* <Input> */
1684 /* library :: A handle to the target library object. */
1685 /* */
1686 /* <Return> */
1687 /* FreeType error code. 0~means success. */
1688 /* */
1689 FT_EXPORT( FT_Error )
1690 FT_Done_FreeType( FT_Library library );
1693 /*************************************************************************/
1694 /* */
1695 /* <Enum> */
1696 /* FT_OPEN_XXX */
1697 /* */
1698 /* <Description> */
1699 /* A list of bit-field constants used within the `flags' field of the */
1700 /* @FT_Open_Args structure. */
1701 /* */
1702 /* <Values> */
1703 /* FT_OPEN_MEMORY :: This is a memory-based stream. */
1704 /* */
1705 /* FT_OPEN_STREAM :: Copy the stream from the `stream' field. */
1706 /* */
1707 /* FT_OPEN_PATHNAME :: Create a new input stream from a C~path */
1708 /* name. */
1709 /* */
1710 /* FT_OPEN_DRIVER :: Use the `driver' field. */
1711 /* */
1712 /* FT_OPEN_PARAMS :: Use the `num_params' and `params' fields. */
1713 /* */
1714 /* ft_open_memory :: Deprecated; use @FT_OPEN_MEMORY instead. */
1715 /* */
1716 /* ft_open_stream :: Deprecated; use @FT_OPEN_STREAM instead. */
1717 /* */
1718 /* ft_open_pathname :: Deprecated; use @FT_OPEN_PATHNAME instead. */
1719 /* */
1720 /* ft_open_driver :: Deprecated; use @FT_OPEN_DRIVER instead. */
1721 /* */
1722 /* ft_open_params :: Deprecated; use @FT_OPEN_PARAMS instead. */
1723 /* */
1724 /* <Note> */
1725 /* The `FT_OPEN_MEMORY', `FT_OPEN_STREAM', and `FT_OPEN_PATHNAME' */
1726 /* flags are mutually exclusive. */
1727 /* */
1728 #define FT_OPEN_MEMORY 0x1
1729 #define FT_OPEN_STREAM 0x2
1730 #define FT_OPEN_PATHNAME 0x4
1731 #define FT_OPEN_DRIVER 0x8
1732 #define FT_OPEN_PARAMS 0x10
1734 #define ft_open_memory FT_OPEN_MEMORY /* deprecated */
1735 #define ft_open_stream FT_OPEN_STREAM /* deprecated */
1736 #define ft_open_pathname FT_OPEN_PATHNAME /* deprecated */
1737 #define ft_open_driver FT_OPEN_DRIVER /* deprecated */
1738 #define ft_open_params FT_OPEN_PARAMS /* deprecated */
1741 /*************************************************************************/
1742 /* */
1743 /* <Struct> */
1744 /* FT_Parameter */
1745 /* */
1746 /* <Description> */
1747 /* A simple structure used to pass more or less generic parameters to */
1748 /* @FT_Open_Face. */
1749 /* */
1750 /* <Fields> */
1751 /* tag :: A four-byte identification tag. */
1752 /* */
1753 /* data :: A pointer to the parameter data. */
1754 /* */
1755 /* <Note> */
1756 /* The ID and function of parameters are driver-specific. See the */
1757 /* various FT_PARAM_TAG_XXX flags for more information. */
1758 /* */
1759 typedef struct FT_Parameter_
1760 {
1761 FT_ULong tag;
1762 FT_Pointer data;
1764 } FT_Parameter;
1767 /*************************************************************************/
1768 /* */
1769 /* <Struct> */
1770 /* FT_Open_Args */
1771 /* */
1772 /* <Description> */
1773 /* A structure used to indicate how to open a new font file or */
1774 /* stream. A pointer to such a structure can be used as a parameter */
1775 /* for the functions @FT_Open_Face and @FT_Attach_Stream. */
1776 /* */
1777 /* <Fields> */
1778 /* flags :: A set of bit flags indicating how to use the */
1779 /* structure. */
1780 /* */
1781 /* memory_base :: The first byte of the file in memory. */
1782 /* */
1783 /* memory_size :: The size in bytes of the file in memory. */
1784 /* */
1785 /* pathname :: A pointer to an 8-bit file pathname. */
1786 /* */
1787 /* stream :: A handle to a source stream object. */
1788 /* */
1789 /* driver :: This field is exclusively used by @FT_Open_Face; */
1790 /* it simply specifies the font driver to use to open */
1791 /* the face. If set to~0, FreeType tries to load the */
1792 /* face with each one of the drivers in its list. */
1793 /* */
1794 /* num_params :: The number of extra parameters. */
1795 /* */
1796 /* params :: Extra parameters passed to the font driver when */
1797 /* opening a new face. */
1798 /* */
1799 /* <Note> */
1800 /* The stream type is determined by the contents of `flags' which */
1801 /* are tested in the following order by @FT_Open_Face: */
1802 /* */
1803 /* If the `FT_OPEN_MEMORY' bit is set, assume that this is a */
1804 /* memory file of `memory_size' bytes, located at `memory_address'. */
1805 /* The data are are not copied, and the client is responsible for */
1806 /* releasing and destroying them _after_ the corresponding call to */
1807 /* @FT_Done_Face. */
1808 /* */
1809 /* Otherwise, if the `FT_OPEN_STREAM' bit is set, assume that a */
1810 /* custom input stream `stream' is used. */
1811 /* */
1812 /* Otherwise, if the `FT_OPEN_PATHNAME' bit is set, assume that this */
1813 /* is a normal file and use `pathname' to open it. */
1814 /* */
1815 /* If the `FT_OPEN_DRIVER' bit is set, @FT_Open_Face only tries to */
1816 /* open the file with the driver whose handler is in `driver'. */
1817 /* */
1818 /* If the `FT_OPEN_PARAMS' bit is set, the parameters given by */
1819 /* `num_params' and `params' is used. They are ignored otherwise. */
1820 /* */
1821 /* Ideally, both the `pathname' and `params' fields should be tagged */
1822 /* as `const'; this is missing for API backwards compatibility. In */
1823 /* other words, applications should treat them as read-only. */
1824 /* */
1825 typedef struct FT_Open_Args_
1826 {
1827 FT_UInt flags;
1828 const FT_Byte* memory_base;
1829 FT_Long memory_size;
1830 FT_String* pathname;
1831 FT_Stream stream;
1832 FT_Module driver;
1833 FT_Int num_params;
1834 FT_Parameter* params;
1836 } FT_Open_Args;
1839 /*************************************************************************/
1840 /* */
1841 /* <Function> */
1842 /* FT_New_Face */
1843 /* */
1844 /* <Description> */
1845 /* This function calls @FT_Open_Face to open a font by its pathname. */
1846 /* */
1847 /* <InOut> */
1848 /* library :: A handle to the library resource. */
1849 /* */
1850 /* <Input> */
1851 /* pathname :: A path to the font file. */
1852 /* */
1853 /* face_index :: The index of the face within the font. The first */
1854 /* face has index~0. */
1855 /* */
1856 /* <Output> */
1857 /* aface :: A handle to a new face object. If `face_index' is */
1858 /* greater than or equal to zero, it must be non-NULL. */
1859 /* See @FT_Open_Face for more details. */
1860 /* */
1861 /* <Return> */
1862 /* FreeType error code. 0~means success. */
1863 /* */
1864 FT_EXPORT( FT_Error )
1865 FT_New_Face( FT_Library library,
1866 const char* filepathname,
1867 FT_Long face_index,
1868 FT_Face *aface );
1871 /*************************************************************************/
1872 /* */
1873 /* <Function> */
1874 /* FT_New_Memory_Face */
1875 /* */
1876 /* <Description> */
1877 /* This function calls @FT_Open_Face to open a font which has been */
1878 /* loaded into memory. */
1879 /* */
1880 /* <InOut> */
1881 /* library :: A handle to the library resource. */
1882 /* */
1883 /* <Input> */
1884 /* file_base :: A pointer to the beginning of the font data. */
1885 /* */
1886 /* file_size :: The size of the memory chunk used by the font data. */
1887 /* */
1888 /* face_index :: The index of the face within the font. The first */
1889 /* face has index~0. */
1890 /* */
1891 /* <Output> */
1892 /* aface :: A handle to a new face object. If `face_index' is */
1893 /* greater than or equal to zero, it must be non-NULL. */
1894 /* See @FT_Open_Face for more details. */
1895 /* */
1896 /* <Return> */
1897 /* FreeType error code. 0~means success. */
1898 /* */
1899 /* <Note> */
1900 /* You must not deallocate the memory before calling @FT_Done_Face. */
1901 /* */
1902 FT_EXPORT( FT_Error )
1903 FT_New_Memory_Face( FT_Library library,
1904 const FT_Byte* file_base,
1905 FT_Long file_size,
1906 FT_Long face_index,
1907 FT_Face *aface );
1910 /*************************************************************************/
1911 /* */
1912 /* <Function> */
1913 /* FT_Open_Face */
1914 /* */
1915 /* <Description> */
1916 /* Create a face object from a given resource described by */
1917 /* @FT_Open_Args. */
1918 /* */
1919 /* <InOut> */
1920 /* library :: A handle to the library resource. */
1921 /* */
1922 /* <Input> */
1923 /* args :: A pointer to an `FT_Open_Args' structure which must */
1924 /* be filled by the caller. */
1925 /* */
1926 /* face_index :: The index of the face within the font. The first */
1927 /* face has index~0. */
1928 /* */
1929 /* <Output> */
1930 /* aface :: A handle to a new face object. If `face_index' is */
1931 /* greater than or equal to zero, it must be non-NULL. */
1932 /* See note below. */
1933 /* */
1934 /* <Return> */
1935 /* FreeType error code. 0~means success. */
1936 /* */
1937 /* <Note> */
1938 /* Unlike FreeType 1.x, this function automatically creates a glyph */
1939 /* slot for the face object which can be accessed directly through */
1940 /* `face->glyph'. */
1941 /* */
1942 /* FT_Open_Face can be used to quickly check whether the font */
1943 /* format of a given font resource is supported by FreeType. If the */
1944 /* `face_index' field is negative, the function's return value is~0 */
1945 /* if the font format is recognized, or non-zero otherwise; */
1946 /* the function returns a more or less empty face handle in `*aface' */
1947 /* (if `aface' isn't NULL). The only useful field in this special */
1948 /* case is `face->num_faces' which gives the number of faces within */
1949 /* the font file. After examination, the returned @FT_Face structure */
1950 /* should be deallocated with a call to @FT_Done_Face. */
1951 /* */
1952 /* Each new face object created with this function also owns a */
1953 /* default @FT_Size object, accessible as `face->size'. */
1954 /* */
1955 /* See the discussion of reference counters in the description of */
1956 /* @FT_Reference_Face. */
1957 /* */
1958 FT_EXPORT( FT_Error )
1959 FT_Open_Face( FT_Library library,
1960 const FT_Open_Args* args,
1961 FT_Long face_index,
1962 FT_Face *aface );
1965 /*************************************************************************/
1966 /* */
1967 /* <Function> */
1968 /* FT_Attach_File */
1969 /* */
1970 /* <Description> */
1971 /* This function calls @FT_Attach_Stream to attach a file. */
1972 /* */
1973 /* <InOut> */
1974 /* face :: The target face object. */
1975 /* */
1976 /* <Input> */
1977 /* filepathname :: The pathname. */
1978 /* */
1979 /* <Return> */
1980 /* FreeType error code. 0~means success. */
1981 /* */
1982 FT_EXPORT( FT_Error )
1983 FT_Attach_File( FT_Face face,
1984 const char* filepathname );
1987 /*************************************************************************/
1988 /* */
1989 /* <Function> */
1990 /* FT_Attach_Stream */
1991 /* */
1992 /* <Description> */
1993 /* `Attach' data to a face object. Normally, this is used to read */
1994 /* additional information for the face object. For example, you can */
1995 /* attach an AFM file that comes with a Type~1 font to get the */
1996 /* kerning values and other metrics. */
1997 /* */
1998 /* <InOut> */
1999 /* face :: The target face object. */
2000 /* */
2001 /* <Input> */
2002 /* parameters :: A pointer to @FT_Open_Args which must be filled by */
2003 /* the caller. */
2004 /* */
2005 /* <Return> */
2006 /* FreeType error code. 0~means success. */
2007 /* */
2008 /* <Note> */
2009 /* The meaning of the `attach' (i.e., what really happens when the */
2010 /* new file is read) is not fixed by FreeType itself. It really */
2011 /* depends on the font format (and thus the font driver). */
2012 /* */
2013 /* Client applications are expected to know what they are doing */
2014 /* when invoking this function. Most drivers simply do not implement */
2015 /* file attachments. */
2016 /* */
2017 FT_EXPORT( FT_Error )
2018 FT_Attach_Stream( FT_Face face,
2019 FT_Open_Args* parameters );
2022 /*************************************************************************/
2023 /* */
2024 /* <Function> */
2025 /* FT_Reference_Face */
2026 /* */
2027 /* <Description> */
2028 /* A counter gets initialized to~1 at the time an @FT_Face structure */
2029 /* is created. This function increments the counter. @FT_Done_Face */
2030 /* then only destroys a face if the counter is~1, otherwise it simply */
2031 /* decrements the counter. */
2032 /* */
2033 /* This function helps in managing life-cycles of structures which */
2034 /* reference @FT_Face objects. */
2035 /* */
2036 /* <Input> */
2037 /* face :: A handle to a target face object. */
2038 /* */
2039 /* <Return> */
2040 /* FreeType error code. 0~means success. */
2041 /* */
2042 /* <Since> */
2043 /* 2.4.2 */
2044 /* */
2045 FT_EXPORT( FT_Error )
2046 FT_Reference_Face( FT_Face face );
2049 /*************************************************************************/
2050 /* */
2051 /* <Function> */
2052 /* FT_Done_Face */
2053 /* */
2054 /* <Description> */
2055 /* Discard a given face object, as well as all of its child slots and */
2056 /* sizes. */
2057 /* */
2058 /* <Input> */
2059 /* face :: A handle to a target face object. */
2060 /* */
2061 /* <Return> */
2062 /* FreeType error code. 0~means success. */
2063 /* */
2064 /* <Note> */
2065 /* See the discussion of reference counters in the description of */
2066 /* @FT_Reference_Face. */
2067 /* */
2068 FT_EXPORT( FT_Error )
2069 FT_Done_Face( FT_Face face );
2072 /*************************************************************************/
2073 /* */
2074 /* <Function> */
2075 /* FT_Select_Size */
2076 /* */
2077 /* <Description> */
2078 /* Select a bitmap strike. */
2079 /* */
2080 /* <InOut> */
2081 /* face :: A handle to a target face object. */
2082 /* */
2083 /* <Input> */
2084 /* strike_index :: The index of the bitmap strike in the */
2085 /* `available_sizes' field of @FT_FaceRec structure. */
2086 /* */
2087 /* <Return> */
2088 /* FreeType error code. 0~means success. */
2089 /* */
2090 FT_EXPORT( FT_Error )
2091 FT_Select_Size( FT_Face face,
2092 FT_Int strike_index );
2095 /*************************************************************************/
2096 /* */
2097 /* <Enum> */
2098 /* FT_Size_Request_Type */
2099 /* */
2100 /* <Description> */
2101 /* An enumeration type that lists the supported size request types. */
2102 /* */
2103 /* <Values> */
2104 /* FT_SIZE_REQUEST_TYPE_NOMINAL :: */
2105 /* The nominal size. The `units_per_EM' field of @FT_FaceRec is */
2106 /* used to determine both scaling values. */
2107 /* */
2108 /* FT_SIZE_REQUEST_TYPE_REAL_DIM :: */
2109 /* The real dimension. The sum of the the `Ascender' and (minus */
2110 /* of) the `Descender' fields of @FT_FaceRec are used to determine */
2111 /* both scaling values. */
2112 /* */
2113 /* FT_SIZE_REQUEST_TYPE_BBOX :: */
2114 /* The font bounding box. The width and height of the `bbox' field */
2115 /* of @FT_FaceRec are used to determine the horizontal and vertical */
2116 /* scaling value, respectively. */
2117 /* */
2118 /* FT_SIZE_REQUEST_TYPE_CELL :: */
2119 /* The `max_advance_width' field of @FT_FaceRec is used to */
2120 /* determine the horizontal scaling value; the vertical scaling */
2121 /* value is determined the same way as */
2122 /* @FT_SIZE_REQUEST_TYPE_REAL_DIM does. Finally, both scaling */
2123 /* values are set to the smaller one. This type is useful if you */
2124 /* want to specify the font size for, say, a window of a given */
2125 /* dimension and 80x24 cells. */
2126 /* */
2127 /* FT_SIZE_REQUEST_TYPE_SCALES :: */
2128 /* Specify the scaling values directly. */
2129 /* */
2130 /* <Note> */
2131 /* The above descriptions only apply to scalable formats. For bitmap */
2132 /* formats, the behaviour is up to the driver. */
2133 /* */
2134 /* See the note section of @FT_Size_Metrics if you wonder how size */
2135 /* requesting relates to scaling values. */
2136 /* */
2137 typedef enum FT_Size_Request_Type_
2138 {
2139 FT_SIZE_REQUEST_TYPE_NOMINAL,
2140 FT_SIZE_REQUEST_TYPE_REAL_DIM,
2141 FT_SIZE_REQUEST_TYPE_BBOX,
2142 FT_SIZE_REQUEST_TYPE_CELL,
2143 FT_SIZE_REQUEST_TYPE_SCALES,
2145 FT_SIZE_REQUEST_TYPE_MAX
2147 } FT_Size_Request_Type;
2150 /*************************************************************************/
2151 /* */
2152 /* <Struct> */
2153 /* FT_Size_RequestRec */
2154 /* */
2155 /* <Description> */
2156 /* A structure used to model a size request. */
2157 /* */
2158 /* <Fields> */
2159 /* type :: See @FT_Size_Request_Type. */
2160 /* */
2161 /* width :: The desired width. */
2162 /* */
2163 /* height :: The desired height. */
2164 /* */
2165 /* horiResolution :: The horizontal resolution. If set to zero, */
2166 /* `width' is treated as a 26.6 fractional pixel */
2167 /* value. */
2168 /* */
2169 /* vertResolution :: The vertical resolution. If set to zero, */
2170 /* `height' is treated as a 26.6 fractional pixel */
2171 /* value. */
2172 /* */
2173 /* <Note> */
2174 /* If `width' is zero, then the horizontal scaling value is set equal */
2175 /* to the vertical scaling value, and vice versa. */
2176 /* */
2177 typedef struct FT_Size_RequestRec_
2178 {
2179 FT_Size_Request_Type type;
2180 FT_Long width;
2181 FT_Long height;
2182 FT_UInt horiResolution;
2183 FT_UInt vertResolution;
2185 } FT_Size_RequestRec;
2188 /*************************************************************************/
2189 /* */
2190 /* <Struct> */
2191 /* FT_Size_Request */
2192 /* */
2193 /* <Description> */
2194 /* A handle to a size request structure. */
2195 /* */
2196 typedef struct FT_Size_RequestRec_ *FT_Size_Request;
2199 /*************************************************************************/
2200 /* */
2201 /* <Function> */
2202 /* FT_Request_Size */
2203 /* */
2204 /* <Description> */
2205 /* Resize the scale of the active @FT_Size object in a face. */
2206 /* */
2207 /* <InOut> */
2208 /* face :: A handle to a target face object. */
2209 /* */
2210 /* <Input> */
2211 /* req :: A pointer to a @FT_Size_RequestRec. */
2212 /* */
2213 /* <Return> */
2214 /* FreeType error code. 0~means success. */
2215 /* */
2216 /* <Note> */
2217 /* Although drivers may select the bitmap strike matching the */
2218 /* request, you should not rely on this if you intend to select a */
2219 /* particular bitmap strike. Use @FT_Select_Size instead in that */
2220 /* case. */
2221 /* */
2222 FT_EXPORT( FT_Error )
2223 FT_Request_Size( FT_Face face,
2224 FT_Size_Request req );
2227 /*************************************************************************/
2228 /* */
2229 /* <Function> */
2230 /* FT_Set_Char_Size */
2231 /* */
2232 /* <Description> */
2233 /* This function calls @FT_Request_Size to request the nominal size */
2234 /* (in points). */
2235 /* */
2236 /* <InOut> */
2237 /* face :: A handle to a target face object. */
2238 /* */
2239 /* <Input> */
2240 /* char_width :: The nominal width, in 26.6 fractional points. */
2241 /* */
2242 /* char_height :: The nominal height, in 26.6 fractional points. */
2243 /* */
2244 /* horz_resolution :: The horizontal resolution in dpi. */
2245 /* */
2246 /* vert_resolution :: The vertical resolution in dpi. */
2247 /* */
2248 /* <Return> */
2249 /* FreeType error code. 0~means success. */
2250 /* */
2251 /* <Note> */
2252 /* If either the character width or height is zero, it is set equal */
2253 /* to the other value. */
2254 /* */
2255 /* If either the horizontal or vertical resolution is zero, it is set */
2256 /* equal to the other value. */
2257 /* */
2258 /* A character width or height smaller than 1pt is set to 1pt; if */
2259 /* both resolution values are zero, they are set to 72dpi. */
2260 /* */
2261 /* Don't use this function if you are using the FreeType cache API. */
2262 /* */
2263 FT_EXPORT( FT_Error )
2264 FT_Set_Char_Size( FT_Face face,
2265 FT_F26Dot6 char_width,
2266 FT_F26Dot6 char_height,
2267 FT_UInt horz_resolution,
2268 FT_UInt vert_resolution );
2271 /*************************************************************************/
2272 /* */
2273 /* <Function> */
2274 /* FT_Set_Pixel_Sizes */
2275 /* */
2276 /* <Description> */
2277 /* This function calls @FT_Request_Size to request the nominal size */
2278 /* (in pixels). */
2279 /* */
2280 /* <InOut> */
2281 /* face :: A handle to the target face object. */
2282 /* */
2283 /* <Input> */
2284 /* pixel_width :: The nominal width, in pixels. */
2285 /* */
2286 /* pixel_height :: The nominal height, in pixels. */
2287 /* */
2288 /* <Return> */
2289 /* FreeType error code. 0~means success. */
2290 /* */
2291 FT_EXPORT( FT_Error )
2292 FT_Set_Pixel_Sizes( FT_Face face,
2293 FT_UInt pixel_width,
2294 FT_UInt pixel_height );
2297 /*************************************************************************/
2298 /* */
2299 /* <Function> */
2300 /* FT_Load_Glyph */
2301 /* */
2302 /* <Description> */
2303 /* A function used to load a single glyph into the glyph slot of a */
2304 /* face object. */
2305 /* */
2306 /* <InOut> */
2307 /* face :: A handle to the target face object where the glyph */
2308 /* is loaded. */
2309 /* */
2310 /* <Input> */
2311 /* glyph_index :: The index of the glyph in the font file. For */
2312 /* CID-keyed fonts (either in PS or in CFF format) */
2313 /* this argument specifies the CID value. */
2314 /* */
2315 /* load_flags :: A flag indicating what to load for this glyph. The */
2316 /* @FT_LOAD_XXX constants can be used to control the */
2317 /* glyph loading process (e.g., whether the outline */
2318 /* should be scaled, whether to load bitmaps or not, */
2319 /* whether to hint the outline, etc). */
2320 /* */
2321 /* <Return> */
2322 /* FreeType error code. 0~means success. */
2323 /* */
2324 /* <Note> */
2325 /* The loaded glyph may be transformed. See @FT_Set_Transform for */
2326 /* the details. */
2327 /* */
2328 /* For subsetted CID-keyed fonts, `FT_Err_Invalid_Argument' is */
2329 /* returned for invalid CID values (this is, for CID values which */
2330 /* don't have a corresponding glyph in the font). See the discussion */
2331 /* of the @FT_FACE_FLAG_CID_KEYED flag for more details. */
2332 /* */
2333 FT_EXPORT( FT_Error )
2334 FT_Load_Glyph( FT_Face face,
2335 FT_UInt glyph_index,
2336 FT_Int32 load_flags );
2339 /*************************************************************************/
2340 /* */
2341 /* <Function> */
2342 /* FT_Load_Char */
2343 /* */
2344 /* <Description> */
2345 /* A function used to load a single glyph into the glyph slot of a */
2346 /* face object, according to its character code. */
2347 /* */
2348 /* <InOut> */
2349 /* face :: A handle to a target face object where the glyph */
2350 /* is loaded. */
2351 /* */
2352 /* <Input> */
2353 /* char_code :: The glyph's character code, according to the */
2354 /* current charmap used in the face. */
2355 /* */
2356 /* load_flags :: A flag indicating what to load for this glyph. The */
2357 /* @FT_LOAD_XXX constants can be used to control the */
2358 /* glyph loading process (e.g., whether the outline */
2359 /* should be scaled, whether to load bitmaps or not, */
2360 /* whether to hint the outline, etc). */
2361 /* */
2362 /* <Return> */
2363 /* FreeType error code. 0~means success. */
2364 /* */
2365 /* <Note> */
2366 /* This function simply calls @FT_Get_Char_Index and @FT_Load_Glyph. */
2367 /* */
2368 FT_EXPORT( FT_Error )
2369 FT_Load_Char( FT_Face face,
2370 FT_ULong char_code,
2371 FT_Int32 load_flags );
2374 /*************************************************************************
2375 *
2376 * @enum:
2377 * FT_LOAD_XXX
2378 *
2379 * @description:
2380 * A list of bit-field constants used with @FT_Load_Glyph to indicate
2381 * what kind of operations to perform during glyph loading.
2382 *
2383 * @values:
2384 * FT_LOAD_DEFAULT ::
2385 * Corresponding to~0, this value is used as the default glyph load
2386 * operation. In this case, the following happens:
2387 *
2388 * 1. FreeType looks for a bitmap for the glyph corresponding to the
2389 * face's current size. If one is found, the function returns.
2390 * The bitmap data can be accessed from the glyph slot (see note
2391 * below).
2392 *
2393 * 2. If no embedded bitmap is searched or found, FreeType looks for a
2394 * scalable outline. If one is found, it is loaded from the font
2395 * file, scaled to device pixels, then `hinted' to the pixel grid
2396 * in order to optimize it. The outline data can be accessed from
2397 * the glyph slot (see note below).
2398 *
2399 * Note that by default, the glyph loader doesn't render outlines into
2400 * bitmaps. The following flags are used to modify this default
2401 * behaviour to more specific and useful cases.
2402 *
2403 * FT_LOAD_NO_SCALE ::
2404 * Don't scale the outline glyph loaded, but keep it in font units.
2405 *
2406 * This flag implies @FT_LOAD_NO_HINTING and @FT_LOAD_NO_BITMAP, and
2407 * unsets @FT_LOAD_RENDER.
2408 *
2409 * FT_LOAD_NO_HINTING ::
2410 * Disable hinting. This generally generates `blurrier' bitmap glyph
2411 * when the glyph is rendered in any of the anti-aliased modes. See
2412 * also the note below.
2413 *
2414 * This flag is implied by @FT_LOAD_NO_SCALE.
2415 *
2416 * FT_LOAD_RENDER ::
2417 * Call @FT_Render_Glyph after the glyph is loaded. By default, the
2418 * glyph is rendered in @FT_RENDER_MODE_NORMAL mode. This can be
2419 * overridden by @FT_LOAD_TARGET_XXX or @FT_LOAD_MONOCHROME.
2420 *
2421 * This flag is unset by @FT_LOAD_NO_SCALE.
2422 *
2423 * FT_LOAD_NO_BITMAP ::
2424 * Ignore bitmap strikes when loading. Bitmap-only fonts ignore this
2425 * flag.
2426 *
2427 * @FT_LOAD_NO_SCALE always sets this flag.
2428 *
2429 * FT_LOAD_VERTICAL_LAYOUT ::
2430 * Load the glyph for vertical text layout. _Don't_ use it as it is
2431 * problematic currently.
2432 *
2433 * FT_LOAD_FORCE_AUTOHINT ::
2434 * Indicates that the auto-hinter is preferred over the font's native
2435 * hinter. See also the note below.
2436 *
2437 * FT_LOAD_CROP_BITMAP ::
2438 * Indicates that the font driver should crop the loaded bitmap glyph
2439 * (i.e., remove all space around its black bits). Not all drivers
2440 * implement this.
2441 *
2442 * FT_LOAD_PEDANTIC ::
2443 * Indicates that the font driver should perform pedantic verifications
2444 * during glyph loading. This is mostly used to detect broken glyphs
2445 * in fonts. By default, FreeType tries to handle broken fonts also.
2446 *
2447 * FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH ::
2448 * Indicates that the font driver should ignore the global advance
2449 * width defined in the font. By default, that value is used as the
2450 * advance width for all glyphs when the face has
2451 * @FT_FACE_FLAG_FIXED_WIDTH set.
2452 *
2453 * This flag exists for historical reasons (to support buggy CJK
2454 * fonts).
2455 *
2456 * FT_LOAD_NO_RECURSE ::
2457 * This flag is only used internally. It merely indicates that the
2458 * font driver should not load composite glyphs recursively. Instead,
2459 * it should set the `num_subglyph' and `subglyphs' values of the
2460 * glyph slot accordingly, and set `glyph->format' to
2461 * @FT_GLYPH_FORMAT_COMPOSITE.
2462 *
2463 * The description of sub-glyphs is not available to client
2464 * applications for now.
2465 *
2466 * This flag implies @FT_LOAD_NO_SCALE and @FT_LOAD_IGNORE_TRANSFORM.
2467 *
2468 * FT_LOAD_IGNORE_TRANSFORM ::
2469 * Indicates that the transform matrix set by @FT_Set_Transform should
2470 * be ignored.
2471 *
2472 * FT_LOAD_MONOCHROME ::
2473 * This flag is used with @FT_LOAD_RENDER to indicate that you want to
2474 * render an outline glyph to a 1-bit monochrome bitmap glyph, with
2475 * 8~pixels packed into each byte of the bitmap data.
2476 *
2477 * Note that this has no effect on the hinting algorithm used. You
2478 * should rather use @FT_LOAD_TARGET_MONO so that the
2479 * monochrome-optimized hinting algorithm is used.
2480 *
2481 * FT_LOAD_LINEAR_DESIGN ::
2482 * Indicates that the `linearHoriAdvance' and `linearVertAdvance'
2483 * fields of @FT_GlyphSlotRec should be kept in font units. See
2484 * @FT_GlyphSlotRec for details.
2485 *
2486 * FT_LOAD_NO_AUTOHINT ::
2487 * Disable auto-hinter. See also the note below.
2488 *
2489 * @note:
2490 * By default, hinting is enabled and the font's native hinter (see
2491 * @FT_FACE_FLAG_HINTER) is preferred over the auto-hinter. You can
2492 * disable hinting by setting @FT_LOAD_NO_HINTING or change the
2493 * precedence by setting @FT_LOAD_FORCE_AUTOHINT. You can also set
2494 * @FT_LOAD_NO_AUTOHINT in case you don't want the auto-hinter to be
2495 * used at all.
2496 *
2497 * See the description of @FT_FACE_FLAG_TRICKY for a special exception
2498 * (affecting only a handful of Asian fonts).
2499 *
2500 * Besides deciding which hinter to use, you can also decide which
2501 * hinting algorithm to use. See @FT_LOAD_TARGET_XXX for details.
2502 *
2503 */
2504 #define FT_LOAD_DEFAULT 0x0
2505 #define FT_LOAD_NO_SCALE 0x1
2506 #define FT_LOAD_NO_HINTING 0x2
2507 #define FT_LOAD_RENDER 0x4
2508 #define FT_LOAD_NO_BITMAP 0x8
2509 #define FT_LOAD_VERTICAL_LAYOUT 0x10
2510 #define FT_LOAD_FORCE_AUTOHINT 0x20
2511 #define FT_LOAD_CROP_BITMAP 0x40
2512 #define FT_LOAD_PEDANTIC 0x80
2513 #define FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH 0x200
2514 #define FT_LOAD_NO_RECURSE 0x400
2515 #define FT_LOAD_IGNORE_TRANSFORM 0x800
2516 #define FT_LOAD_MONOCHROME 0x1000
2517 #define FT_LOAD_LINEAR_DESIGN 0x2000
2518 #define FT_LOAD_NO_AUTOHINT 0x8000U
2520 /* */
2522 /* used internally only by certain font drivers! */
2523 #define FT_LOAD_ADVANCE_ONLY 0x100
2524 #define FT_LOAD_SBITS_ONLY 0x4000
2527 /**************************************************************************
2528 *
2529 * @enum:
2530 * FT_LOAD_TARGET_XXX
2531 *
2532 * @description:
2533 * A list of values that are used to select a specific hinting algorithm
2534 * to use by the hinter. You should OR one of these values to your
2535 * `load_flags' when calling @FT_Load_Glyph.
2536 *
2537 * Note that font's native hinters may ignore the hinting algorithm you
2538 * have specified (e.g., the TrueType bytecode interpreter). You can set
2539 * @FT_LOAD_FORCE_AUTOHINT to ensure that the auto-hinter is used.
2540 *
2541 * Also note that @FT_LOAD_TARGET_LIGHT is an exception, in that it
2542 * always implies @FT_LOAD_FORCE_AUTOHINT.
2543 *
2544 * @values:
2545 * FT_LOAD_TARGET_NORMAL ::
2546 * This corresponds to the default hinting algorithm, optimized for
2547 * standard gray-level rendering. For monochrome output, use
2548 * @FT_LOAD_TARGET_MONO instead.
2549 *
2550 * FT_LOAD_TARGET_LIGHT ::
2551 * A lighter hinting algorithm for non-monochrome modes. Many
2552 * generated glyphs are more fuzzy but better resemble its original
2553 * shape. A bit like rendering on Mac OS~X.
2554 *
2555 * As a special exception, this target implies @FT_LOAD_FORCE_AUTOHINT.
2556 *
2557 * FT_LOAD_TARGET_MONO ::
2558 * Strong hinting algorithm that should only be used for monochrome
2559 * output. The result is probably unpleasant if the glyph is rendered
2560 * in non-monochrome modes.
2561 *
2562 * FT_LOAD_TARGET_LCD ::
2563 * A variant of @FT_LOAD_TARGET_NORMAL optimized for horizontally
2564 * decimated LCD displays.
2565 *
2566 * FT_LOAD_TARGET_LCD_V ::
2567 * A variant of @FT_LOAD_TARGET_NORMAL optimized for vertically
2568 * decimated LCD displays.
2569 *
2570 * @note:
2571 * You should use only _one_ of the FT_LOAD_TARGET_XXX values in your
2572 * `load_flags'. They can't be ORed.
2573 *
2574 * If @FT_LOAD_RENDER is also set, the glyph is rendered in the
2575 * corresponding mode (i.e., the mode which matches the used algorithm
2576 * best) unless @FT_LOAD_MONOCHROME is set.
2577 *
2578 * You can use a hinting algorithm that doesn't correspond to the same
2579 * rendering mode. As an example, it is possible to use the `light'
2580 * hinting algorithm and have the results rendered in horizontal LCD
2581 * pixel mode, with code like
2582 *
2583 * {
2584 * FT_Load_Glyph( face, glyph_index,
2585 * load_flags | FT_LOAD_TARGET_LIGHT );
2586 *
2587 * FT_Render_Glyph( face->glyph, FT_RENDER_MODE_LCD );
2588 * }
2589 *
2590 */
2591 #define FT_LOAD_TARGET_( x ) ( (FT_Int32)( (x) & 15 ) << 16 )
2593 #define FT_LOAD_TARGET_NORMAL FT_LOAD_TARGET_( FT_RENDER_MODE_NORMAL )
2594 #define FT_LOAD_TARGET_LIGHT FT_LOAD_TARGET_( FT_RENDER_MODE_LIGHT )
2595 #define FT_LOAD_TARGET_MONO FT_LOAD_TARGET_( FT_RENDER_MODE_MONO )
2596 #define FT_LOAD_TARGET_LCD FT_LOAD_TARGET_( FT_RENDER_MODE_LCD )
2597 #define FT_LOAD_TARGET_LCD_V FT_LOAD_TARGET_( FT_RENDER_MODE_LCD_V )
2600 /**************************************************************************
2601 *
2602 * @macro:
2603 * FT_LOAD_TARGET_MODE
2604 *
2605 * @description:
2606 * Return the @FT_Render_Mode corresponding to a given
2607 * @FT_LOAD_TARGET_XXX value.
2608 *
2609 */
2610 #define FT_LOAD_TARGET_MODE( x ) ( (FT_Render_Mode)( ( (x) >> 16 ) & 15 ) )
2613 /*************************************************************************/
2614 /* */
2615 /* <Function> */
2616 /* FT_Set_Transform */
2617 /* */
2618 /* <Description> */
2619 /* A function used to set the transformation that is applied to glyph */
2620 /* images when they are loaded into a glyph slot through */
2621 /* @FT_Load_Glyph. */
2622 /* */
2623 /* <InOut> */
2624 /* face :: A handle to the source face object. */
2625 /* */
2626 /* <Input> */
2627 /* matrix :: A pointer to the transformation's 2x2 matrix. Use~0 for */
2628 /* the identity matrix. */
2629 /* delta :: A pointer to the translation vector. Use~0 for the null */
2630 /* vector. */
2631 /* */
2632 /* <Note> */
2633 /* The transformation is only applied to scalable image formats after */
2634 /* the glyph has been loaded. It means that hinting is unaltered by */
2635 /* the transformation and is performed on the character size given in */
2636 /* the last call to @FT_Set_Char_Size or @FT_Set_Pixel_Sizes. */
2637 /* */
2638 /* Note that this also transforms the `face.glyph.advance' field, but */
2639 /* *not* the values in `face.glyph.metrics'. */
2640 /* */
2641 FT_EXPORT( void )
2642 FT_Set_Transform( FT_Face face,
2643 FT_Matrix* matrix,
2644 FT_Vector* delta );
2647 /*************************************************************************/
2648 /* */
2649 /* <Enum> */
2650 /* FT_Render_Mode */
2651 /* */
2652 /* <Description> */
2653 /* An enumeration type that lists the render modes supported by */
2654 /* FreeType~2. Each mode corresponds to a specific type of scanline */
2655 /* conversion performed on the outline. */
2656 /* */
2657 /* For bitmap fonts and embedded bitmaps the `bitmap->pixel_mode' */
2658 /* field in the @FT_GlyphSlotRec structure gives the format of the */
2659 /* returned bitmap. */
2660 /* */
2661 /* All modes except @FT_RENDER_MODE_MONO use 256 levels of opacity. */
2662 /* */
2663 /* <Values> */
2664 /* FT_RENDER_MODE_NORMAL :: */
2665 /* This is the default render mode; it corresponds to 8-bit */
2666 /* anti-aliased bitmaps. */
2667 /* */
2668 /* FT_RENDER_MODE_LIGHT :: */
2669 /* This is equivalent to @FT_RENDER_MODE_NORMAL. It is only */
2670 /* defined as a separate value because render modes are also used */
2671 /* indirectly to define hinting algorithm selectors. See */
2672 /* @FT_LOAD_TARGET_XXX for details. */
2673 /* */
2674 /* FT_RENDER_MODE_MONO :: */
2675 /* This mode corresponds to 1-bit bitmaps (with 2~levels of */
2676 /* opacity). */
2677 /* */
2678 /* FT_RENDER_MODE_LCD :: */
2679 /* This mode corresponds to horizontal RGB and BGR sub-pixel */
2680 /* displays like LCD screens. It produces 8-bit bitmaps that are */
2681 /* 3~times the width of the original glyph outline in pixels, and */
2682 /* which use the @FT_PIXEL_MODE_LCD mode. */
2683 /* */
2684 /* FT_RENDER_MODE_LCD_V :: */
2685 /* This mode corresponds to vertical RGB and BGR sub-pixel displays */
2686 /* (like PDA screens, rotated LCD displays, etc.). It produces */
2687 /* 8-bit bitmaps that are 3~times the height of the original */
2688 /* glyph outline in pixels and use the @FT_PIXEL_MODE_LCD_V mode. */
2689 /* */
2690 /* <Note> */
2691 /* The LCD-optimized glyph bitmaps produced by FT_Render_Glyph can be */
2692 /* filtered to reduce color-fringes by using @FT_Library_SetLcdFilter */
2693 /* (not active in the default builds). It is up to the caller to */
2694 /* either call @FT_Library_SetLcdFilter (if available) or do the */
2695 /* filtering itself. */
2696 /* */
2697 /* The selected render mode only affects vector glyphs of a font. */
2698 /* Embedded bitmaps often have a different pixel mode like */
2699 /* @FT_PIXEL_MODE_MONO. You can use @FT_Bitmap_Convert to transform */
2700 /* them into 8-bit pixmaps. */
2701 /* */
2702 typedef enum FT_Render_Mode_
2703 {
2704 FT_RENDER_MODE_NORMAL = 0,
2705 FT_RENDER_MODE_LIGHT,
2706 FT_RENDER_MODE_MONO,
2707 FT_RENDER_MODE_LCD,
2708 FT_RENDER_MODE_LCD_V,
2710 FT_RENDER_MODE_MAX
2712 } FT_Render_Mode;
2715 /*************************************************************************/
2716 /* */
2717 /* <Enum> */
2718 /* ft_render_mode_xxx */
2719 /* */
2720 /* <Description> */
2721 /* These constants are deprecated. Use the corresponding */
2722 /* @FT_Render_Mode values instead. */
2723 /* */
2724 /* <Values> */
2725 /* ft_render_mode_normal :: see @FT_RENDER_MODE_NORMAL */
2726 /* ft_render_mode_mono :: see @FT_RENDER_MODE_MONO */
2727 /* */
2728 #define ft_render_mode_normal FT_RENDER_MODE_NORMAL
2729 #define ft_render_mode_mono FT_RENDER_MODE_MONO
2732 /*************************************************************************/
2733 /* */
2734 /* <Function> */
2735 /* FT_Render_Glyph */
2736 /* */
2737 /* <Description> */
2738 /* Convert a given glyph image to a bitmap. It does so by inspecting */
2739 /* the glyph image format, finding the relevant renderer, and */
2740 /* invoking it. */
2741 /* */
2742 /* <InOut> */
2743 /* slot :: A handle to the glyph slot containing the image to */
2744 /* convert. */
2745 /* */
2746 /* <Input> */
2747 /* render_mode :: This is the render mode used to render the glyph */
2748 /* image into a bitmap. See @FT_Render_Mode for a */
2749 /* list of possible values. */
2750 /* */
2751 /* <Return> */
2752 /* FreeType error code. 0~means success. */
2753 /* */
2754 FT_EXPORT( FT_Error )
2755 FT_Render_Glyph( FT_GlyphSlot slot,
2756 FT_Render_Mode render_mode );
2759 /*************************************************************************/
2760 /* */
2761 /* <Enum> */
2762 /* FT_Kerning_Mode */
2763 /* */
2764 /* <Description> */
2765 /* An enumeration used to specify which kerning values to return in */
2766 /* @FT_Get_Kerning. */
2767 /* */
2768 /* <Values> */
2769 /* FT_KERNING_DEFAULT :: Return scaled and grid-fitted kerning */
2770 /* distances (value is~0). */
2771 /* */
2772 /* FT_KERNING_UNFITTED :: Return scaled but un-grid-fitted kerning */
2773 /* distances. */
2774 /* */
2775 /* FT_KERNING_UNSCALED :: Return the kerning vector in original font */
2776 /* units. */
2777 /* */
2778 typedef enum FT_Kerning_Mode_
2779 {
2780 FT_KERNING_DEFAULT = 0,
2781 FT_KERNING_UNFITTED,
2782 FT_KERNING_UNSCALED
2784 } FT_Kerning_Mode;
2787 /*************************************************************************/
2788 /* */
2789 /* <Const> */
2790 /* ft_kerning_default */
2791 /* */
2792 /* <Description> */
2793 /* This constant is deprecated. Please use @FT_KERNING_DEFAULT */
2794 /* instead. */
2795 /* */
2796 #define ft_kerning_default FT_KERNING_DEFAULT
2799 /*************************************************************************/
2800 /* */
2801 /* <Const> */
2802 /* ft_kerning_unfitted */
2803 /* */
2804 /* <Description> */
2805 /* This constant is deprecated. Please use @FT_KERNING_UNFITTED */
2806 /* instead. */
2807 /* */
2808 #define ft_kerning_unfitted FT_KERNING_UNFITTED
2811 /*************************************************************************/
2812 /* */
2813 /* <Const> */
2814 /* ft_kerning_unscaled */
2815 /* */
2816 /* <Description> */
2817 /* This constant is deprecated. Please use @FT_KERNING_UNSCALED */
2818 /* instead. */
2819 /* */
2820 #define ft_kerning_unscaled FT_KERNING_UNSCALED
2823 /*************************************************************************/
2824 /* */
2825 /* <Function> */
2826 /* FT_Get_Kerning */
2827 /* */
2828 /* <Description> */
2829 /* Return the kerning vector between two glyphs of a same face. */
2830 /* */
2831 /* <Input> */
2832 /* face :: A handle to a source face object. */
2833 /* */
2834 /* left_glyph :: The index of the left glyph in the kern pair. */
2835 /* */
2836 /* right_glyph :: The index of the right glyph in the kern pair. */
2837 /* */
2838 /* kern_mode :: See @FT_Kerning_Mode for more information. */
2839 /* Determines the scale and dimension of the returned */
2840 /* kerning vector. */
2841 /* */
2842 /* <Output> */
2843 /* akerning :: The kerning vector. This is either in font units */
2844 /* or in pixels (26.6 format) for scalable formats, */
2845 /* and in pixels for fixed-sizes formats. */
2846 /* */
2847 /* <Return> */
2848 /* FreeType error code. 0~means success. */
2849 /* */
2850 /* <Note> */
2851 /* Only horizontal layouts (left-to-right & right-to-left) are */
2852 /* supported by this method. Other layouts, or more sophisticated */
2853 /* kernings, are out of the scope of this API function -- they can be */
2854 /* implemented through format-specific interfaces. */
2855 /* */
2856 FT_EXPORT( FT_Error )
2857 FT_Get_Kerning( FT_Face face,
2858 FT_UInt left_glyph,
2859 FT_UInt right_glyph,
2860 FT_UInt kern_mode,
2861 FT_Vector *akerning );
2864 /*************************************************************************/
2865 /* */
2866 /* <Function> */
2867 /* FT_Get_Track_Kerning */
2868 /* */
2869 /* <Description> */
2870 /* Return the track kerning for a given face object at a given size. */
2871 /* */
2872 /* <Input> */
2873 /* face :: A handle to a source face object. */
2874 /* */
2875 /* point_size :: The point size in 16.16 fractional points. */
2876 /* */
2877 /* degree :: The degree of tightness. */
2878 /* */
2879 /* <Output> */
2880 /* akerning :: The kerning in 16.16 fractional points. */
2881 /* */
2882 /* <Return> */
2883 /* FreeType error code. 0~means success. */
2884 /* */
2885 FT_EXPORT( FT_Error )
2886 FT_Get_Track_Kerning( FT_Face face,
2887 FT_Fixed point_size,
2888 FT_Int degree,
2889 FT_Fixed* akerning );
2892 /*************************************************************************/
2893 /* */
2894 /* <Function> */
2895 /* FT_Get_Glyph_Name */
2896 /* */
2897 /* <Description> */
2898 /* Retrieve the ASCII name of a given glyph in a face. This only */
2899 /* works for those faces where @FT_HAS_GLYPH_NAMES(face) returns~1. */
2900 /* */
2901 /* <Input> */
2902 /* face :: A handle to a source face object. */
2903 /* */
2904 /* glyph_index :: The glyph index. */
2905 /* */
2906 /* buffer_max :: The maximal number of bytes available in the */
2907 /* buffer. */
2908 /* */
2909 /* <Output> */
2910 /* buffer :: A pointer to a target buffer where the name is */
2911 /* copied to. */
2912 /* */
2913 /* <Return> */
2914 /* FreeType error code. 0~means success. */
2915 /* */
2916 /* <Note> */
2917 /* An error is returned if the face doesn't provide glyph names or if */
2918 /* the glyph index is invalid. In all cases of failure, the first */
2919 /* byte of `buffer' is set to~0 to indicate an empty name. */
2920 /* */
2921 /* The glyph name is truncated to fit within the buffer if it is too */
2922 /* long. The returned string is always zero-terminated. */
2923 /* */
2924 /* This function is not compiled within the library if the config */
2925 /* macro `FT_CONFIG_OPTION_NO_GLYPH_NAMES' is defined in */
2926 /* `include/freetype/config/ftoptions.h'. */
2927 /* */
2928 FT_EXPORT( FT_Error )
2929 FT_Get_Glyph_Name( FT_Face face,
2930 FT_UInt glyph_index,
2931 FT_Pointer buffer,
2932 FT_UInt buffer_max );
2935 /*************************************************************************/
2936 /* */
2937 /* <Function> */
2938 /* FT_Get_Postscript_Name */
2939 /* */
2940 /* <Description> */
2941 /* Retrieve the ASCII PostScript name of a given face, if available. */
2942 /* This only works with PostScript and TrueType fonts. */
2943 /* */
2944 /* <Input> */
2945 /* face :: A handle to the source face object. */
2946 /* */
2947 /* <Return> */
2948 /* A pointer to the face's PostScript name. NULL if unavailable. */
2949 /* */
2950 /* <Note> */
2951 /* The returned pointer is owned by the face and is destroyed with */
2952 /* it. */
2953 /* */
2954 FT_EXPORT( const char* )
2955 FT_Get_Postscript_Name( FT_Face face );
2958 /*************************************************************************/
2959 /* */
2960 /* <Function> */
2961 /* FT_Select_Charmap */
2962 /* */
2963 /* <Description> */
2964 /* Select a given charmap by its encoding tag (as listed in */
2965 /* `freetype.h'). */
2966 /* */
2967 /* <InOut> */
2968 /* face :: A handle to the source face object. */
2969 /* */
2970 /* <Input> */
2971 /* encoding :: A handle to the selected encoding. */
2972 /* */
2973 /* <Return> */
2974 /* FreeType error code. 0~means success. */
2975 /* */
2976 /* <Note> */
2977 /* This function returns an error if no charmap in the face */
2978 /* corresponds to the encoding queried here. */
2979 /* */
2980 /* Because many fonts contain more than a single cmap for Unicode */
2981 /* encoding, this function has some special code to select the one */
2982 /* which covers Unicode best (`best' in the sense that a UCS-4 cmap */
2983 /* is preferred to a UCS-2 cmap). It is thus preferable to */
2984 /* @FT_Set_Charmap in this case. */
2985 /* */
2986 FT_EXPORT( FT_Error )
2987 FT_Select_Charmap( FT_Face face,
2988 FT_Encoding encoding );
2991 /*************************************************************************/
2992 /* */
2993 /* <Function> */
2994 /* FT_Set_Charmap */
2995 /* */
2996 /* <Description> */
2997 /* Select a given charmap for character code to glyph index mapping. */
2998 /* */
2999 /* <InOut> */
3000 /* face :: A handle to the source face object. */
3001 /* */
3002 /* <Input> */
3003 /* charmap :: A handle to the selected charmap. */
3004 /* */
3005 /* <Return> */
3006 /* FreeType error code. 0~means success. */
3007 /* */
3008 /* <Note> */
3009 /* This function returns an error if the charmap is not part of */
3010 /* the face (i.e., if it is not listed in the `face->charmaps' */
3011 /* table). */
3012 /* */
3013 /* It also fails if a type~14 charmap is selected. */
3014 /* */
3015 FT_EXPORT( FT_Error )
3016 FT_Set_Charmap( FT_Face face,
3017 FT_CharMap charmap );
3020 /*************************************************************************
3021 *
3022 * @function:
3023 * FT_Get_Charmap_Index
3024 *
3025 * @description:
3026 * Retrieve index of a given charmap.
3027 *
3028 * @input:
3029 * charmap ::
3030 * A handle to a charmap.
3031 *
3032 * @return:
3033 * The index into the array of character maps within the face to which
3034 * `charmap' belongs. If an error occurs, -1 is returned.
3035 *
3036 */
3037 FT_EXPORT( FT_Int )
3038 FT_Get_Charmap_Index( FT_CharMap charmap );
3041 /*************************************************************************/
3042 /* */
3043 /* <Function> */
3044 /* FT_Get_Char_Index */
3045 /* */
3046 /* <Description> */
3047 /* Return the glyph index of a given character code. This function */
3048 /* uses a charmap object to do the mapping. */
3049 /* */
3050 /* <Input> */
3051 /* face :: A handle to the source face object. */
3052 /* */
3053 /* charcode :: The character code. */
3054 /* */
3055 /* <Return> */
3056 /* The glyph index. 0~means `undefined character code'. */
3057 /* */
3058 /* <Note> */
3059 /* If you use FreeType to manipulate the contents of font files */
3060 /* directly, be aware that the glyph index returned by this function */
3061 /* doesn't always correspond to the internal indices used within */
3062 /* the file. This is done to ensure that value~0 always corresponds */
3063 /* to the `missing glyph'. */
3064 /* */
3065 FT_EXPORT( FT_UInt )
3066 FT_Get_Char_Index( FT_Face face,
3067 FT_ULong charcode );
3070 /*************************************************************************/
3071 /* */
3072 /* <Function> */
3073 /* FT_Get_First_Char */
3074 /* */
3075 /* <Description> */
3076 /* This function is used to return the first character code in the */
3077 /* current charmap of a given face. It also returns the */
3078 /* corresponding glyph index. */
3079 /* */
3080 /* <Input> */
3081 /* face :: A handle to the source face object. */
3082 /* */
3083 /* <Output> */
3084 /* agindex :: Glyph index of first character code. 0~if charmap is */
3085 /* empty. */
3086 /* */
3087 /* <Return> */
3088 /* The charmap's first character code. */
3089 /* */
3090 /* <Note> */
3091 /* You should use this function with @FT_Get_Next_Char to be able to */
3092 /* parse all character codes available in a given charmap. The code */
3093 /* should look like this: */
3094 /* */
3095 /* { */
3096 /* FT_ULong charcode; */
3097 /* FT_UInt gindex; */
3098 /* */
3099 /* */
3100 /* charcode = FT_Get_First_Char( face, &gindex ); */
3101 /* while ( gindex != 0 ) */
3102 /* { */
3103 /* ... do something with (charcode,gindex) pair ... */
3104 /* */
3105 /* charcode = FT_Get_Next_Char( face, charcode, &gindex ); */
3106 /* } */
3107 /* } */
3108 /* */
3109 /* Note that `*agindex' is set to~0 if the charmap is empty. The */
3110 /* result itself can be~0 in two cases: if the charmap is empty or */
3111 /* if the value~0 is the first valid character code. */
3112 /* */
3113 FT_EXPORT( FT_ULong )
3114 FT_Get_First_Char( FT_Face face,
3115 FT_UInt *agindex );
3118 /*************************************************************************/
3119 /* */
3120 /* <Function> */
3121 /* FT_Get_Next_Char */
3122 /* */
3123 /* <Description> */
3124 /* This function is used to return the next character code in the */
3125 /* current charmap of a given face following the value `char_code', */
3126 /* as well as the corresponding glyph index. */
3127 /* */
3128 /* <Input> */
3129 /* face :: A handle to the source face object. */
3130 /* char_code :: The starting character code. */
3131 /* */
3132 /* <Output> */
3133 /* agindex :: Glyph index of next character code. 0~if charmap */
3134 /* is empty. */
3135 /* */
3136 /* <Return> */
3137 /* The charmap's next character code. */
3138 /* */
3139 /* <Note> */
3140 /* You should use this function with @FT_Get_First_Char to walk */
3141 /* over all character codes available in a given charmap. See the */
3142 /* note for this function for a simple code example. */
3143 /* */
3144 /* Note that `*agindex' is set to~0 when there are no more codes in */
3145 /* the charmap. */
3146 /* */
3147 FT_EXPORT( FT_ULong )
3148 FT_Get_Next_Char( FT_Face face,
3149 FT_ULong char_code,
3150 FT_UInt *agindex );
3153 /*************************************************************************/
3154 /* */
3155 /* <Function> */
3156 /* FT_Get_Name_Index */
3157 /* */
3158 /* <Description> */
3159 /* Return the glyph index of a given glyph name. This function uses */
3160 /* driver specific objects to do the translation. */
3161 /* */
3162 /* <Input> */
3163 /* face :: A handle to the source face object. */
3164 /* */
3165 /* glyph_name :: The glyph name. */
3166 /* */
3167 /* <Return> */
3168 /* The glyph index. 0~means `undefined character code'. */
3169 /* */
3170 FT_EXPORT( FT_UInt )
3171 FT_Get_Name_Index( FT_Face face,
3172 FT_String* glyph_name );
3175 /*************************************************************************
3176 *
3177 * @macro:
3178 * FT_SUBGLYPH_FLAG_XXX
3179 *
3180 * @description:
3181 * A list of constants used to describe subglyphs. Please refer to the
3182 * TrueType specification for the meaning of the various flags.
3183 *
3184 * @values:
3185 * FT_SUBGLYPH_FLAG_ARGS_ARE_WORDS ::
3186 * FT_SUBGLYPH_FLAG_ARGS_ARE_XY_VALUES ::
3187 * FT_SUBGLYPH_FLAG_ROUND_XY_TO_GRID ::
3188 * FT_SUBGLYPH_FLAG_SCALE ::
3189 * FT_SUBGLYPH_FLAG_XY_SCALE ::
3190 * FT_SUBGLYPH_FLAG_2X2 ::
3191 * FT_SUBGLYPH_FLAG_USE_MY_METRICS ::
3192 *
3193 */
3194 #define FT_SUBGLYPH_FLAG_ARGS_ARE_WORDS 1
3195 #define FT_SUBGLYPH_FLAG_ARGS_ARE_XY_VALUES 2
3196 #define FT_SUBGLYPH_FLAG_ROUND_XY_TO_GRID 4
3197 #define FT_SUBGLYPH_FLAG_SCALE 8
3198 #define FT_SUBGLYPH_FLAG_XY_SCALE 0x40
3199 #define FT_SUBGLYPH_FLAG_2X2 0x80
3200 #define FT_SUBGLYPH_FLAG_USE_MY_METRICS 0x200
3203 /*************************************************************************
3204 *
3205 * @func:
3206 * FT_Get_SubGlyph_Info
3207 *
3208 * @description:
3209 * Retrieve a description of a given subglyph. Only use it if
3210 * `glyph->format' is @FT_GLYPH_FORMAT_COMPOSITE; an error is
3211 * returned otherwise.
3212 *
3213 * @input:
3214 * glyph ::
3215 * The source glyph slot.
3216 *
3217 * sub_index ::
3218 * The index of the subglyph. Must be less than
3219 * `glyph->num_subglyphs'.
3220 *
3221 * @output:
3222 * p_index ::
3223 * The glyph index of the subglyph.
3224 *
3225 * p_flags ::
3226 * The subglyph flags, see @FT_SUBGLYPH_FLAG_XXX.
3227 *
3228 * p_arg1 ::
3229 * The subglyph's first argument (if any).
3230 *
3231 * p_arg2 ::
3232 * The subglyph's second argument (if any).
3233 *
3234 * p_transform ::
3235 * The subglyph transformation (if any).
3236 *
3237 * @return:
3238 * FreeType error code. 0~means success.
3239 *
3240 * @note:
3241 * The values of `*p_arg1', `*p_arg2', and `*p_transform' must be
3242 * interpreted depending on the flags returned in `*p_flags'. See the
3243 * TrueType specification for details.
3244 *
3245 */
3246 FT_EXPORT( FT_Error )
3247 FT_Get_SubGlyph_Info( FT_GlyphSlot glyph,
3248 FT_UInt sub_index,
3249 FT_Int *p_index,
3250 FT_UInt *p_flags,
3251 FT_Int *p_arg1,
3252 FT_Int *p_arg2,
3253 FT_Matrix *p_transform );
3256 /*************************************************************************/
3257 /* */
3258 /* <Enum> */
3259 /* FT_FSTYPE_XXX */
3260 /* */
3261 /* <Description> */
3262 /* A list of bit flags used in the `fsType' field of the OS/2 table */
3263 /* in a TrueType or OpenType font and the `FSType' entry in a */
3264 /* PostScript font. These bit flags are returned by */
3265 /* @FT_Get_FSType_Flags; they inform client applications of embedding */
3266 /* and subsetting restrictions associated with a font. */
3267 /* */
3268 /* See http://www.adobe.com/devnet/acrobat/pdfs/FontPolicies.pdf for */
3269 /* more details. */
3270 /* */
3271 /* <Values> */
3272 /* FT_FSTYPE_INSTALLABLE_EMBEDDING :: */
3273 /* Fonts with no fsType bit set may be embedded and permanently */
3274 /* installed on the remote system by an application. */
3275 /* */
3276 /* FT_FSTYPE_RESTRICTED_LICENSE_EMBEDDING :: */
3277 /* Fonts that have only this bit set must not be modified, embedded */
3278 /* or exchanged in any manner without first obtaining permission of */
3279 /* the font software copyright owner. */
3280 /* */
3281 /* FT_FSTYPE_PREVIEW_AND_PRINT_EMBEDDING :: */
3282 /* If this bit is set, the font may be embedded and temporarily */
3283 /* loaded on the remote system. Documents containing Preview & */
3284 /* Print fonts must be opened `read-only'; no edits can be applied */
3285 /* to the document. */
3286 /* */
3287 /* FT_FSTYPE_EDITABLE_EMBEDDING :: */
3288 /* If this bit is set, the font may be embedded but must only be */
3289 /* installed temporarily on other systems. In contrast to Preview */
3290 /* & Print fonts, documents containing editable fonts may be opened */
3291 /* for reading, editing is permitted, and changes may be saved. */
3292 /* */
3293 /* FT_FSTYPE_NO_SUBSETTING :: */
3294 /* If this bit is set, the font may not be subsetted prior to */
3295 /* embedding. */
3296 /* */
3297 /* FT_FSTYPE_BITMAP_EMBEDDING_ONLY :: */
3298 /* If this bit is set, only bitmaps contained in the font may be */
3299 /* embedded; no outline data may be embedded. If there are no */
3300 /* bitmaps available in the font, then the font is unembeddable. */
3301 /* */
3302 /* <Note> */
3303 /* While the fsType flags can indicate that a font may be embedded, a */
3304 /* license with the font vendor may be separately required to use the */
3305 /* font in this way. */
3306 /* */
3307 #define FT_FSTYPE_INSTALLABLE_EMBEDDING 0x0000
3308 #define FT_FSTYPE_RESTRICTED_LICENSE_EMBEDDING 0x0002
3309 #define FT_FSTYPE_PREVIEW_AND_PRINT_EMBEDDING 0x0004
3310 #define FT_FSTYPE_EDITABLE_EMBEDDING 0x0008
3311 #define FT_FSTYPE_NO_SUBSETTING 0x0100
3312 #define FT_FSTYPE_BITMAP_EMBEDDING_ONLY 0x0200
3315 /*************************************************************************/
3316 /* */
3317 /* <Function> */
3318 /* FT_Get_FSType_Flags */
3319 /* */
3320 /* <Description> */
3321 /* Return the fsType flags for a font. */
3322 /* */
3323 /* <Input> */
3324 /* face :: A handle to the source face object. */
3325 /* */
3326 /* <Return> */
3327 /* The fsType flags, @FT_FSTYPE_XXX. */
3328 /* */
3329 /* <Note> */
3330 /* Use this function rather than directly reading the `fs_type' field */
3331 /* in the @PS_FontInfoRec structure which is only guaranteed to */
3332 /* return the correct results for Type~1 fonts. */
3333 /* */
3334 FT_EXPORT( FT_UShort )
3335 FT_Get_FSType_Flags( FT_Face face );
3338 /*************************************************************************/
3339 /* */
3340 /* <Section> */
3341 /* glyph_variants */
3342 /* */
3343 /* <Title> */
3344 /* Glyph Variants */
3345 /* */
3346 /* <Abstract> */
3347 /* The FreeType~2 interface to Unicode Ideographic Variation */
3348 /* Sequences (IVS), using the SFNT cmap format~14. */
3349 /* */
3350 /* <Description> */
3351 /* Many CJK characters have variant forms. They are a sort of grey */
3352 /* area somewhere between being totally irrelevant and semantically */
3353 /* distinct; for this reason, the Unicode consortium decided to */
3354 /* introduce Ideographic Variation Sequences (IVS), consisting of a */
3355 /* Unicode base character and one of 240 variant selectors */
3356 /* (U+E0100-U+E01EF), instead of further extending the already huge */
3357 /* code range for CJK characters. */
3358 /* */
3359 /* An IVS is registered and unique; for further details please refer */
3360 /* to Unicode Technical Report #37, the Ideographic Variation */
3361 /* Database. To date (October 2007), the character with the most */
3362 /* variants is U+908A, having 8~such IVS. */
3363 /* */
3364 /* Adobe and MS decided to support IVS with a new cmap subtable */
3365 /* (format~14). It is an odd subtable because it is not a mapping of */
3366 /* input code points to glyphs, but contains lists of all variants */
3367 /* supported by the font. */
3368 /* */
3369 /* A variant may be either `default' or `non-default'. A default */
3370 /* variant is the one you will get for that code point if you look it */
3371 /* up in the standard Unicode cmap. A non-default variant is a */
3372 /* different glyph. */
3373 /* */
3374 /*************************************************************************/
3377 /*************************************************************************/
3378 /* */
3379 /* <Function> */
3380 /* FT_Face_GetCharVariantIndex */
3381 /* */
3382 /* <Description> */
3383 /* Return the glyph index of a given character code as modified by */
3384 /* the variation selector. */
3385 /* */
3386 /* <Input> */
3387 /* face :: */
3388 /* A handle to the source face object. */
3389 /* */
3390 /* charcode :: */
3391 /* The character code point in Unicode. */
3392 /* */
3393 /* variantSelector :: */
3394 /* The Unicode code point of the variation selector. */
3395 /* */
3396 /* <Return> */
3397 /* The glyph index. 0~means either `undefined character code', or */
3398 /* `undefined selector code', or `no variation selector cmap */
3399 /* subtable', or `current CharMap is not Unicode'. */
3400 /* */
3401 /* <Note> */
3402 /* If you use FreeType to manipulate the contents of font files */
3403 /* directly, be aware that the glyph index returned by this function */
3404 /* doesn't always correspond to the internal indices used within */
3405 /* the file. This is done to ensure that value~0 always corresponds */
3406 /* to the `missing glyph'. */
3407 /* */
3408 /* This function is only meaningful if */
3409 /* a) the font has a variation selector cmap sub table, */
3410 /* and */
3411 /* b) the current charmap has a Unicode encoding. */
3412 /* */
3413 /* <Since> */
3414 /* 2.3.6 */
3415 /* */
3416 FT_EXPORT( FT_UInt )
3417 FT_Face_GetCharVariantIndex( FT_Face face,
3418 FT_ULong charcode,
3419 FT_ULong variantSelector );
3422 /*************************************************************************/
3423 /* */
3424 /* <Function> */
3425 /* FT_Face_GetCharVariantIsDefault */
3426 /* */
3427 /* <Description> */
3428 /* Check whether this variant of this Unicode character is the one to */
3429 /* be found in the `cmap'. */
3430 /* */
3431 /* <Input> */
3432 /* face :: */
3433 /* A handle to the source face object. */
3434 /* */
3435 /* charcode :: */
3436 /* The character codepoint in Unicode. */
3437 /* */
3438 /* variantSelector :: */
3439 /* The Unicode codepoint of the variation selector. */
3440 /* */
3441 /* <Return> */
3442 /* 1~if found in the standard (Unicode) cmap, 0~if found in the */
3443 /* variation selector cmap, or -1 if it is not a variant. */
3444 /* */
3445 /* <Note> */
3446 /* This function is only meaningful if the font has a variation */
3447 /* selector cmap subtable. */
3448 /* */
3449 /* <Since> */
3450 /* 2.3.6 */
3451 /* */
3452 FT_EXPORT( FT_Int )
3453 FT_Face_GetCharVariantIsDefault( FT_Face face,
3454 FT_ULong charcode,
3455 FT_ULong variantSelector );
3458 /*************************************************************************/
3459 /* */
3460 /* <Function> */
3461 /* FT_Face_GetVariantSelectors */
3462 /* */
3463 /* <Description> */
3464 /* Return a zero-terminated list of Unicode variant selectors found */
3465 /* in the font. */
3466 /* */
3467 /* <Input> */
3468 /* face :: */
3469 /* A handle to the source face object. */
3470 /* */
3471 /* <Return> */
3472 /* A pointer to an array of selector code points, or NULL if there is */
3473 /* no valid variant selector cmap subtable. */
3474 /* */
3475 /* <Note> */
3476 /* The last item in the array is~0; the array is owned by the */
3477 /* @FT_Face object but can be overwritten or released on the next */
3478 /* call to a FreeType function. */
3479 /* */
3480 /* <Since> */
3481 /* 2.3.6 */
3482 /* */
3483 FT_EXPORT( FT_UInt32* )
3484 FT_Face_GetVariantSelectors( FT_Face face );
3487 /*************************************************************************/
3488 /* */
3489 /* <Function> */
3490 /* FT_Face_GetVariantsOfChar */
3491 /* */
3492 /* <Description> */
3493 /* Return a zero-terminated list of Unicode variant selectors found */
3494 /* for the specified character code. */
3495 /* */
3496 /* <Input> */
3497 /* face :: */
3498 /* A handle to the source face object. */
3499 /* */
3500 /* charcode :: */
3501 /* The character codepoint in Unicode. */
3502 /* */
3503 /* <Return> */
3504 /* A pointer to an array of variant selector code points which are */
3505 /* active for the given character, or NULL if the corresponding list */
3506 /* is empty. */
3507 /* */
3508 /* <Note> */
3509 /* The last item in the array is~0; the array is owned by the */
3510 /* @FT_Face object but can be overwritten or released on the next */
3511 /* call to a FreeType function. */
3512 /* */
3513 /* <Since> */
3514 /* 2.3.6 */
3515 /* */
3516 FT_EXPORT( FT_UInt32* )
3517 FT_Face_GetVariantsOfChar( FT_Face face,
3518 FT_ULong charcode );
3521 /*************************************************************************/
3522 /* */
3523 /* <Function> */
3524 /* FT_Face_GetCharsOfVariant */
3525 /* */
3526 /* <Description> */
3527 /* Return a zero-terminated list of Unicode character codes found for */
3528 /* the specified variant selector. */
3529 /* */
3530 /* <Input> */
3531 /* face :: */
3532 /* A handle to the source face object. */
3533 /* */
3534 /* variantSelector :: */
3535 /* The variant selector code point in Unicode. */
3536 /* */
3537 /* <Return> */
3538 /* A list of all the code points which are specified by this selector */
3539 /* (both default and non-default codes are returned) or NULL if there */
3540 /* is no valid cmap or the variant selector is invalid. */
3541 /* */
3542 /* <Note> */
3543 /* The last item in the array is~0; the array is owned by the */
3544 /* @FT_Face object but can be overwritten or released on the next */
3545 /* call to a FreeType function. */
3546 /* */
3547 /* <Since> */
3548 /* 2.3.6 */
3549 /* */
3550 FT_EXPORT( FT_UInt32* )
3551 FT_Face_GetCharsOfVariant( FT_Face face,
3552 FT_ULong variantSelector );
3555 /*************************************************************************/
3556 /* */
3557 /* <Section> */
3558 /* computations */
3559 /* */
3560 /* <Title> */
3561 /* Computations */
3562 /* */
3563 /* <Abstract> */
3564 /* Crunching fixed numbers and vectors. */
3565 /* */
3566 /* <Description> */
3567 /* This section contains various functions used to perform */
3568 /* computations on 16.16 fixed-float numbers or 2d vectors. */
3569 /* */
3570 /* <Order> */
3571 /* FT_MulDiv */
3572 /* FT_MulFix */
3573 /* FT_DivFix */
3574 /* FT_RoundFix */
3575 /* FT_CeilFix */
3576 /* FT_FloorFix */
3577 /* FT_Vector_Transform */
3578 /* FT_Matrix_Multiply */
3579 /* FT_Matrix_Invert */
3580 /* */
3581 /*************************************************************************/
3584 /*************************************************************************/
3585 /* */
3586 /* <Function> */
3587 /* FT_MulDiv */
3588 /* */
3589 /* <Description> */
3590 /* A very simple function used to perform the computation `(a*b)/c' */
3591 /* with maximal accuracy (it uses a 64-bit intermediate integer */
3592 /* whenever necessary). */
3593 /* */
3594 /* This function isn't necessarily as fast as some processor specific */
3595 /* operations, but is at least completely portable. */
3596 /* */
3597 /* <Input> */
3598 /* a :: The first multiplier. */
3599 /* b :: The second multiplier. */
3600 /* c :: The divisor. */
3601 /* */
3602 /* <Return> */
3603 /* The result of `(a*b)/c'. This function never traps when trying to */
3604 /* divide by zero; it simply returns `MaxInt' or `MinInt' depending */
3605 /* on the signs of `a' and `b'. */
3606 /* */
3607 FT_EXPORT( FT_Long )
3608 FT_MulDiv( FT_Long a,
3609 FT_Long b,
3610 FT_Long c );
3613 /* */
3615 /* The following #if 0 ... #endif is for the documentation formatter, */
3616 /* hiding the internal `FT_MULFIX_INLINED' macro. */
3618 #if 0
3619 /*************************************************************************/
3620 /* */
3621 /* <Function> */
3622 /* FT_MulFix */
3623 /* */
3624 /* <Description> */
3625 /* A very simple function used to perform the computation */
3626 /* `(a*b)/0x10000' with maximal accuracy. Most of the time this is */
3627 /* used to multiply a given value by a 16.16 fixed float factor. */
3628 /* */
3629 /* <Input> */
3630 /* a :: The first multiplier. */
3631 /* b :: The second multiplier. Use a 16.16 factor here whenever */
3632 /* possible (see note below). */
3633 /* */
3634 /* <Return> */
3635 /* The result of `(a*b)/0x10000'. */
3636 /* */
3637 /* <Note> */
3638 /* This function has been optimized for the case where the absolute */
3639 /* value of `a' is less than 2048, and `b' is a 16.16 scaling factor. */
3640 /* As this happens mainly when scaling from notional units to */
3641 /* fractional pixels in FreeType, it resulted in noticeable speed */
3642 /* improvements between versions 2.x and 1.x. */
3643 /* */
3644 /* As a conclusion, always try to place a 16.16 factor as the */
3645 /* _second_ argument of this function; this can make a great */
3646 /* difference. */
3647 /* */
3648 FT_EXPORT( FT_Long )
3649 FT_MulFix( FT_Long a,
3650 FT_Long b );
3652 /* */
3653 #endif
3655 #ifdef FT_MULFIX_INLINED
3656 #define FT_MulFix( a, b ) FT_MULFIX_INLINED( a, b )
3657 #else
3658 FT_EXPORT( FT_Long )
3659 FT_MulFix( FT_Long a,
3660 FT_Long b );
3661 #endif
3664 /*************************************************************************/
3665 /* */
3666 /* <Function> */
3667 /* FT_DivFix */
3668 /* */
3669 /* <Description> */
3670 /* A very simple function used to perform the computation */
3671 /* `(a*0x10000)/b' with maximal accuracy. Most of the time, this is */
3672 /* used to divide a given value by a 16.16 fixed float factor. */
3673 /* */
3674 /* <Input> */
3675 /* a :: The first multiplier. */
3676 /* b :: The second multiplier. Use a 16.16 factor here whenever */
3677 /* possible (see note below). */
3678 /* */
3679 /* <Return> */
3680 /* The result of `(a*0x10000)/b'. */
3681 /* */
3682 /* <Note> */
3683 /* The optimization for FT_DivFix() is simple: If (a~<<~16) fits in */
3684 /* 32~bits, then the division is computed directly. Otherwise, we */
3685 /* use a specialized version of @FT_MulDiv. */
3686 /* */
3687 FT_EXPORT( FT_Long )
3688 FT_DivFix( FT_Long a,
3689 FT_Long b );
3692 /*************************************************************************/
3693 /* */
3694 /* <Function> */
3695 /* FT_RoundFix */
3696 /* */
3697 /* <Description> */
3698 /* A very simple function used to round a 16.16 fixed number. */
3699 /* */
3700 /* <Input> */
3701 /* a :: The number to be rounded. */
3702 /* */
3703 /* <Return> */
3704 /* The result of `(a + 0x8000) & -0x10000'. */
3705 /* */
3706 FT_EXPORT( FT_Fixed )
3707 FT_RoundFix( FT_Fixed a );
3710 /*************************************************************************/
3711 /* */
3712 /* <Function> */
3713 /* FT_CeilFix */
3714 /* */
3715 /* <Description> */
3716 /* A very simple function used to compute the ceiling function of a */
3717 /* 16.16 fixed number. */
3718 /* */
3719 /* <Input> */
3720 /* a :: The number for which the ceiling function is to be computed. */
3721 /* */
3722 /* <Return> */
3723 /* The result of `(a + 0x10000 - 1) & -0x10000'. */
3724 /* */
3725 FT_EXPORT( FT_Fixed )
3726 FT_CeilFix( FT_Fixed a );
3729 /*************************************************************************/
3730 /* */
3731 /* <Function> */
3732 /* FT_FloorFix */
3733 /* */
3734 /* <Description> */
3735 /* A very simple function used to compute the floor function of a */
3736 /* 16.16 fixed number. */
3737 /* */
3738 /* <Input> */
3739 /* a :: The number for which the floor function is to be computed. */
3740 /* */
3741 /* <Return> */
3742 /* The result of `a & -0x10000'. */
3743 /* */
3744 FT_EXPORT( FT_Fixed )
3745 FT_FloorFix( FT_Fixed a );
3748 /*************************************************************************/
3749 /* */
3750 /* <Function> */
3751 /* FT_Vector_Transform */
3752 /* */
3753 /* <Description> */
3754 /* Transform a single vector through a 2x2 matrix. */
3755 /* */
3756 /* <InOut> */
3757 /* vector :: The target vector to transform. */
3758 /* */
3759 /* <Input> */
3760 /* matrix :: A pointer to the source 2x2 matrix. */
3761 /* */
3762 /* <Note> */
3763 /* The result is undefined if either `vector' or `matrix' is invalid. */
3764 /* */
3765 FT_EXPORT( void )
3766 FT_Vector_Transform( FT_Vector* vec,
3767 const FT_Matrix* matrix );
3770 /*************************************************************************/
3771 /* */
3772 /* <Section> */
3773 /* version */
3774 /* */
3775 /* <Title> */
3776 /* FreeType Version */
3777 /* */
3778 /* <Abstract> */
3779 /* Functions and macros related to FreeType versions. */
3780 /* */
3781 /* <Description> */
3782 /* Note that those functions and macros are of limited use because */
3783 /* even a new release of FreeType with only documentation changes */
3784 /* increases the version number. */
3785 /* */
3786 /*************************************************************************/
3789 /*************************************************************************
3790 *
3791 * @enum:
3792 * FREETYPE_XXX
3793 *
3794 * @description:
3795 * These three macros identify the FreeType source code version.
3796 * Use @FT_Library_Version to access them at runtime.
3797 *
3798 * @values:
3799 * FREETYPE_MAJOR :: The major version number.
3800 * FREETYPE_MINOR :: The minor version number.
3801 * FREETYPE_PATCH :: The patch level.
3802 *
3803 * @note:
3804 * The version number of FreeType if built as a dynamic link library
3805 * with the `libtool' package is _not_ controlled by these three
3806 * macros.
3807 *
3808 */
3809 #define FREETYPE_MAJOR 2
3810 #define FREETYPE_MINOR 4
3811 #define FREETYPE_PATCH 4
3814 /*************************************************************************/
3815 /* */
3816 /* <Function> */
3817 /* FT_Library_Version */
3818 /* */
3819 /* <Description> */
3820 /* Return the version of the FreeType library being used. This is */
3821 /* useful when dynamically linking to the library, since one cannot */
3822 /* use the macros @FREETYPE_MAJOR, @FREETYPE_MINOR, and */
3823 /* @FREETYPE_PATCH. */
3824 /* */
3825 /* <Input> */
3826 /* library :: A source library handle. */
3827 /* */
3828 /* <Output> */
3829 /* amajor :: The major version number. */
3830 /* */
3831 /* aminor :: The minor version number. */
3832 /* */
3833 /* apatch :: The patch version number. */
3834 /* */
3835 /* <Note> */
3836 /* The reason why this function takes a `library' argument is because */
3837 /* certain programs implement library initialization in a custom way */
3838 /* that doesn't use @FT_Init_FreeType. */
3839 /* */
3840 /* In such cases, the library version might not be available before */
3841 /* the library object has been created. */
3842 /* */
3843 FT_EXPORT( void )
3844 FT_Library_Version( FT_Library library,
3845 FT_Int *amajor,
3846 FT_Int *aminor,
3847 FT_Int *apatch );
3850 /*************************************************************************/
3851 /* */
3852 /* <Function> */
3853 /* FT_Face_CheckTrueTypePatents */
3854 /* */
3855 /* <Description> */
3856 /* Parse all bytecode instructions of a TrueType font file to check */
3857 /* whether any of the patented opcodes are used. This is only useful */
3858 /* if you want to be able to use the unpatented hinter with */
3859 /* fonts that do *not* use these opcodes. */
3860 /* */
3861 /* Note that this function parses *all* glyph instructions in the */
3862 /* font file, which may be slow. */
3863 /* */
3864 /* <Input> */
3865 /* face :: A face handle. */
3866 /* */
3867 /* <Return> */
3868 /* 1~if this is a TrueType font that uses one of the patented */
3869 /* opcodes, 0~otherwise. */
3870 /* */
3871 /* <Note> */
3872 /* Since May 2010, TrueType hinting is no longer patented. */
3873 /* */
3874 /* <Since> */
3875 /* 2.3.5 */
3876 /* */
3877 FT_EXPORT( FT_Bool )
3878 FT_Face_CheckTrueTypePatents( FT_Face face );
3881 /*************************************************************************/
3882 /* */
3883 /* <Function> */
3884 /* FT_Face_SetUnpatentedHinting */
3885 /* */
3886 /* <Description> */
3887 /* Enable or disable the unpatented hinter for a given face. */
3888 /* Only enable it if you have determined that the face doesn't */
3889 /* use any patented opcodes (see @FT_Face_CheckTrueTypePatents). */
3890 /* */
3891 /* <Input> */
3892 /* face :: A face handle. */
3893 /* */
3894 /* value :: New boolean setting. */
3895 /* */
3896 /* <Return> */
3897 /* The old setting value. This will always be false if this is not */
3898 /* an SFNT font, or if the unpatented hinter is not compiled in this */
3899 /* instance of the library. */
3900 /* */
3901 /* <Note> */
3902 /* Since May 2010, TrueType hinting is no longer patented. */
3903 /* */
3904 /* <Since> */
3905 /* 2.3.5 */
3906 /* */
3907 FT_EXPORT( FT_Bool )
3908 FT_Face_SetUnpatentedHinting( FT_Face face,
3909 FT_Bool value );
3911 /* */
3914 FT_END_HEADER
3916 #endif /* __FREETYPE_H__ */
3919 /* END */