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source: trunk/poppler/freetype2/include/freetype/freetype.h @ 262

Last change on this file since 262 was 262, checked in by Eugene Romanenko, 12 years ago
PDF plugin: freetype library updated to version 2.3.8
File size: 238.3 KB

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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 by */
8	/* David Turner, Robert Wilhelm, and Werner Lemberg. */
9	/* */
10	/* This file is part of the FreeType project, and may only be used, */
11	/* modified, and distributed under the terms of the FreeType project */
12	/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
13	/* this file you indicate that you have read the license and */
14	/* understand and accept it fully. */
15	/* */
16	/***************************************************************************/
17
18
19	#ifndef FT_FREETYPE_H
20	#error "`ft2build.h' hasn't been included yet!"
21	#error "Please always use macros to include FreeType header files."
22	#error "Example:"
23	#error " #include <ft2build.h>"
24	#error " #include FT_FREETYPE_H"
25	#endif
26
27
28	/*************************************************************************/
29	/* */
30	/* The `raster' component duplicates some of the declarations in */
31	/* freetype.h for stand-alone use if _FREETYPE_ isn't defined. */
32	/* */
33	/*************************************************************************/
34
35
36	#ifndef __FREETYPE_H__
37	#define __FREETYPE_H__
38
39
40	#include <ft2build.h>
41	#include FT_CONFIG_CONFIG_H
42	#include FT_ERRORS_H
43	#include FT_TYPES_H
44
45
46	FT_BEGIN_HEADER
47
48
49
50	/*************************************************************************/
51	/* */
52	/* <Section> */
53	/* user_allocation */
54	/* */
55	/* <Title> */
56	/* User allocation */
57	/* */
58	/* <Abstract> */
59	/* How client applications should allocate FreeType data structures. */
60	/* */
61	/* <Description> */
62	/* FreeType assumes that structures allocated by the user and passed */
63	/* as arguments are zeroed out except for the actual data. In other */
64	/* words, it is recommended to use `calloc' (or variants of it) */
65	/* instead of `malloc' for allocation. */
66	/* */
67	/*************************************************************************/
68
69
70
71	/*************************************************************************/
72	/*************************************************************************/
73	/* */
74	/* B A S I C T Y P E S */
75	/* */
76	/*************************************************************************/
77	/*************************************************************************/
78
79
80	/*************************************************************************/
81	/* */
82	/* <Section> */
83	/* base_interface */
84	/* */
85	/* <Title> */
86	/* Base Interface */
87	/* */
88	/* <Abstract> */
89	/* The FreeType~2 base font interface. */
90	/* */
91	/* <Description> */
92	/* This section describes the public high-level API of FreeType~2. */
93	/* */
94	/* <Order> */
95	/* FT_Library */
96	/* FT_Face */
97	/* FT_Size */
98	/* FT_GlyphSlot */
99	/* FT_CharMap */
100	/* FT_Encoding */
101	/* */
102	/* FT_FaceRec */
103	/* */
104	/* FT_FACE_FLAG_SCALABLE */
105	/* FT_FACE_FLAG_FIXED_SIZES */
106	/* FT_FACE_FLAG_FIXED_WIDTH */
107	/* FT_FACE_FLAG_HORIZONTAL */
108	/* FT_FACE_FLAG_VERTICAL */
109	/* FT_FACE_FLAG_SFNT */
110	/* FT_FACE_FLAG_KERNING */
111	/* FT_FACE_FLAG_MULTIPLE_MASTERS */
112	/* FT_FACE_FLAG_GLYPH_NAMES */
113	/* FT_FACE_FLAG_EXTERNAL_STREAM */
114	/* FT_FACE_FLAG_FAST_GLYPHS */
115	/* FT_FACE_FLAG_HINTER */
116	/* */
117	/* FT_STYLE_FLAG_BOLD */
118	/* FT_STYLE_FLAG_ITALIC */
119	/* */
120	/* FT_SizeRec */
121	/* FT_Size_Metrics */
122	/* */
123	/* FT_GlyphSlotRec */
124	/* FT_Glyph_Metrics */
125	/* FT_SubGlyph */
126	/* */
127	/* FT_Bitmap_Size */
128	/* */
129	/* FT_Init_FreeType */
130	/* FT_Done_FreeType */
131	/* */
132	/* FT_New_Face */
133	/* FT_Done_Face */
134	/* FT_New_Memory_Face */
135	/* FT_Open_Face */
136	/* FT_Open_Args */
137	/* FT_Parameter */
138	/* FT_Attach_File */
139	/* FT_Attach_Stream */
140	/* */
141	/* FT_Set_Char_Size */
142	/* FT_Set_Pixel_Sizes */
143	/* FT_Request_Size */
144	/* FT_Select_Size */
145	/* FT_Size_Request_Type */
146	/* FT_Size_Request */
147	/* FT_Set_Transform */
148	/* FT_Load_Glyph */
149	/* FT_Get_Char_Index */
150	/* FT_Get_Name_Index */
151	/* FT_Load_Char */
152	/* */
153	/* FT_OPEN_MEMORY */
154	/* FT_OPEN_STREAM */
155	/* FT_OPEN_PATHNAME */
156	/* FT_OPEN_DRIVER */
157	/* FT_OPEN_PARAMS */
158	/* */
159	/* FT_LOAD_DEFAULT */
160	/* FT_LOAD_RENDER */
161	/* FT_LOAD_MONOCHROME */
162	/* FT_LOAD_LINEAR_DESIGN */
163	/* FT_LOAD_NO_SCALE */
164	/* FT_LOAD_NO_HINTING */
165	/* FT_LOAD_NO_BITMAP */
166	/* FT_LOAD_CROP_BITMAP */
167	/* */
168	/* FT_LOAD_VERTICAL_LAYOUT */
169	/* FT_LOAD_IGNORE_TRANSFORM */
170	/* FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH */
171	/* FT_LOAD_FORCE_AUTOHINT */
172	/* FT_LOAD_NO_RECURSE */
173	/* FT_LOAD_PEDANTIC */
174	/* */
175	/* FT_LOAD_TARGET_NORMAL */
176	/* FT_LOAD_TARGET_LIGHT */
177	/* FT_LOAD_TARGET_MONO */
178	/* FT_LOAD_TARGET_LCD */
179	/* FT_LOAD_TARGET_LCD_V */
180	/* */
181	/* FT_Render_Glyph */
182	/* FT_Render_Mode */
183	/* FT_Get_Kerning */
184	/* FT_Kerning_Mode */
185	/* FT_Get_Track_Kerning */
186	/* FT_Get_Glyph_Name */
187	/* FT_Get_Postscript_Name */
188	/* */
189	/* FT_CharMapRec */
190	/* FT_Select_Charmap */
191	/* FT_Set_Charmap */
192	/* FT_Get_Charmap_Index */
193	/* */
194	/* FT_FSTYPE_INSTALLABLE_EMBEDDING */
195	/* FT_FSTYPE_RESTRICTED_LICENSE_EMBEDDING */
196	/* FT_FSTYPE_PREVIEW_AND_PRINT_EMBEDDING */
197	/* FT_FSTYPE_EDITABLE_EMBEDDING */
198	/* FT_FSTYPE_NO_SUBSETTING */
199	/* FT_FSTYPE_BITMAP_EMBEDDING_ONLY */
200	/* */
201	/* FT_Get_FSType_Flags */
202	/* */
203	/*************************************************************************/
204
205
206	/*************************************************************************/
207	/* */
208	/* <Struct> */
209	/* FT_Glyph_Metrics */
210	/* */
211	/* <Description> */
212	/* A structure used to model the metrics of a single glyph. The */
213	/* values are expressed in 26.6 fractional pixel format; if the flag */
214	/* @FT_LOAD_NO_SCALE has been used while loading the glyph, values */
215	/* are expressed in font units instead. */
216	/* */
217	/* <Fields> */
218	/* width :: */
219	/* The glyph's width. */
220	/* */
221	/* height :: */
222	/* The glyph's height. */
223	/* */
224	/* horiBearingX :: */
225	/* Left side bearing for horizontal layout. */
226	/* */
227	/* horiBearingY :: */
228	/* Top side bearing for horizontal layout. */
229	/* */
230	/* horiAdvance :: */
231	/* Advance width for horizontal layout. */
232	/* */
233	/* vertBearingX :: */
234	/* Left side bearing for vertical layout. */
235	/* */
236	/* vertBearingY :: */
237	/* Top side bearing for vertical layout. */
238	/* */
239	/* vertAdvance :: */
240	/* Advance height for vertical layout. */
241	/* */
242	typedef struct FT_Glyph_Metrics_
243	{
244	FT_Pos width;
245	FT_Pos height;
246
247	FT_Pos horiBearingX;
248	FT_Pos horiBearingY;
249	FT_Pos horiAdvance;
250
251	FT_Pos vertBearingX;
252	FT_Pos vertBearingY;
253	FT_Pos vertAdvance;
254
255	} FT_Glyph_Metrics;
256
257
258	/*************************************************************************/
259	/* */
260	/* <Struct> */
261	/* FT_Bitmap_Size */
262	/* */
263	/* <Description> */
264	/* This structure models the metrics of a bitmap strike (i.e., a set */
265	/* of glyphs for a given point size and resolution) in a bitmap font. */
266	/* It is used for the `available_sizes' field of @FT_Face. */
267	/* */
268	/* <Fields> */
269	/* height :: The vertical distance, in pixels, between two */
270	/* consecutive baselines. It is always positive. */
271	/* */
272	/* width :: The average width, in pixels, of all glyphs in the */
273	/* strike. */
274	/* */
275	/* size :: The nominal size of the strike in 26.6 fractional */
276	/* points. This field is not very useful. */
277	/* */
278	/* x_ppem :: The horizontal ppem (nominal width) in 26.6 fractional */
279	/* pixels. */
280	/* */
281	/* y_ppem :: The vertical ppem (nominal height) in 26.6 fractional */
282	/* pixels. */
283	/* */
284	/* <Note> */
285	/* Windows FNT: */
286	/* The nominal size given in a FNT font is not reliable. Thus when */
287	/* the driver finds it incorrect, it sets `size' to some calculated */
288	/* values and sets `x_ppem' and `y_ppem' to the pixel width and */
289	/* height given in the font, respectively. */
290	/* */
291	/* TrueType embedded bitmaps: */
292	/* `size', `width', and `height' values are not contained in the */
293	/* bitmap strike itself. They are computed from the global font */
294	/* parameters. */
295	/* */
296	typedef struct FT_Bitmap_Size_
297	{
298	FT_Short height;
299	FT_Short width;
300
301	FT_Pos size;
302
303	FT_Pos x_ppem;
304	FT_Pos y_ppem;
305
306	} FT_Bitmap_Size;
307
308
309	/*************************************************************************/
310	/*************************************************************************/
311	/* */
312	/* O B J E C T C L A S S E S */
313	/* */
314	/*************************************************************************/
315	/*************************************************************************/
316
317	/*************************************************************************/
318	/* */
319	/* <Type> */
320	/* FT_Library */
321	/* */
322	/* <Description> */
323	/* A handle to a FreeType library instance. Each `library' is */
324	/* completely independent from the others; it is the `root' of a set */
325	/* of objects like fonts, faces, sizes, etc. */
326	/* */
327	/* It also embeds a memory manager (see @FT_Memory), as well as a */
328	/* scan-line converter object (see @FT_Raster). */
329	/* */
330	/* For multi-threading applications each thread should have its own */
331	/* FT_Library object. */
332	/* */
333	/* <Note> */
334	/* Library objects are normally created by @FT_Init_FreeType, and */
335	/* destroyed with @FT_Done_FreeType. */
336	/* */
337	typedef struct FT_LibraryRec_ *FT_Library;
338
339
340	/*************************************************************************/
341	/* */
342	/* <Type> */
343	/* FT_Module */
344	/* */
345	/* <Description> */
346	/* A handle to a given FreeType module object. Each module can be a */
347	/* font driver, a renderer, or anything else that provides services */
348	/* to the formers. */
349	/* */
350	typedef struct FT_ModuleRec_* FT_Module;
351
352
353	/*************************************************************************/
354	/* */
355	/* <Type> */
356	/* FT_Driver */
357	/* */
358	/* <Description> */
359	/* A handle to a given FreeType font driver object. Each font driver */
360	/* is a special module capable of creating faces from font files. */
361	/* */
362	typedef struct FT_DriverRec_* FT_Driver;
363
364
365	/*************************************************************************/
366	/* */
367	/* <Type> */
368	/* FT_Renderer */
369	/* */
370	/* <Description> */
371	/* A handle to a given FreeType renderer. A renderer is a special */
372	/* module in charge of converting a glyph image to a bitmap, when */
373	/* necessary. Each renderer supports a given glyph image format, and */
374	/* one or more target surface depths. */
375	/* */
376	typedef struct FT_RendererRec_* FT_Renderer;
377
378
379	/*************************************************************************/
380	/* */
381	/* <Type> */
382	/* FT_Face */
383	/* */
384	/* <Description> */
385	/* A handle to a given typographic face object. A face object models */
386	/* a given typeface, in a given style. */
387	/* */
388	/* <Note> */
389	/* Each face object also owns a single @FT_GlyphSlot object, as well */
390	/* as one or more @FT_Size objects. */
391	/* */
392	/* Use @FT_New_Face or @FT_Open_Face to create a new face object from */
393	/* a given filepathname or a custom input stream. */
394	/* */
395	/* Use @FT_Done_Face to destroy it (along with its slot and sizes). */
396	/* */
397	/* <Also> */
398	/* The @FT_FaceRec details the publicly accessible fields of a given */
399	/* face object. */
400	/* */
401	typedef struct FT_FaceRec_* FT_Face;
402
403
404	/*************************************************************************/
405	/* */
406	/* <Type> */
407	/* FT_Size */
408	/* */
409	/* <Description> */
410	/* A handle to an object used to model a face scaled to a given */
411	/* character size. */
412	/* */
413	/* <Note> */
414	/* Each @FT_Face has an _active_ @FT_Size object that is used by */
415	/* functions like @FT_Load_Glyph to determine the scaling */
416	/* transformation which is used to load and hint glyphs and metrics. */
417	/* */
418	/* You can use @FT_Set_Char_Size, @FT_Set_Pixel_Sizes, */
419	/* @FT_Request_Size or even @FT_Select_Size to change the content */
420	/* (i.e., the scaling values) of the active @FT_Size. */
421	/* */
422	/* You can use @FT_New_Size to create additional size objects for a */
423	/* given @FT_Face, but they won't be used by other functions until */
424	/* you activate it through @FT_Activate_Size. Only one size can be */
425	/* activated at any given time per face. */
426	/* */
427	/* <Also> */
428	/* The @FT_SizeRec structure details the publicly accessible fields */
429	/* of a given size object. */
430	/* */
431	typedef struct FT_SizeRec_* FT_Size;
432
433
434	/*************************************************************************/
435	/* */
436	/* <Type> */
437	/* FT_GlyphSlot */
438	/* */
439	/* <Description> */
440	/* A handle to a given `glyph slot'. A slot is a container where it */
441	/* is possible to load any one of the glyphs contained in its parent */
442	/* face. */
443	/* */
444	/* In other words, each time you call @FT_Load_Glyph or */
445	/* @FT_Load_Char, the slot's content is erased by the new glyph data, */
446	/* i.e., the glyph's metrics, its image (bitmap or outline), and */
447	/* other control information. */
448	/* */
449	/* <Also> */
450	/* @FT_GlyphSlotRec details the publicly accessible glyph fields. */
451	/* */
452	typedef struct FT_GlyphSlotRec_* FT_GlyphSlot;
453
454
455	/*************************************************************************/
456	/* */
457	/* <Type> */
458	/* FT_CharMap */
459	/* */
460	/* <Description> */
461	/* A handle to a given character map. A charmap is used to translate */
462	/* character codes in a given encoding into glyph indexes for its */
463	/* parent's face. Some font formats may provide several charmaps per */
464	/* font. */
465	/* */
466	/* Each face object owns zero or more charmaps, but only one of them */
467	/* can be `active' and used by @FT_Get_Char_Index or @FT_Load_Char. */
468	/* */
469	/* The list of available charmaps in a face is available through the */
470	/* `face->num_charmaps' and `face->charmaps' fields of @FT_FaceRec. */
471	/* */
472	/* The currently active charmap is available as `face->charmap'. */
473	/* You should call @FT_Set_Charmap to change it. */
474	/* */
475	/* <Note> */
476	/* When a new face is created (either through @FT_New_Face or */
477	/* @FT_Open_Face), the library looks for a Unicode charmap within */
478	/* the list and automatically activates it. */
479	/* */
480	/* <Also> */
481	/* The @FT_CharMapRec details the publicly accessible fields of a */
482	/* given character map. */
483	/* */
484	typedef struct FT_CharMapRec_* FT_CharMap;
485
486
487	/*************************************************************************/
488	/* */
489	/* <Macro> */
490	/* FT_ENC_TAG */
491	/* */
492	/* <Description> */
493	/* This macro converts four-letter tags into an unsigned long. It is */
494	/* used to define `encoding' identifiers (see @FT_Encoding). */
495	/* */
496	/* <Note> */
497	/* Since many 16-bit compilers don't like 32-bit enumerations, you */
498	/* should redefine this macro in case of problems to something like */
499	/* this: */
500	/* */
501	/* { */
502	/* #define FT_ENC_TAG( value, a, b, c, d ) value */
503	/* } */
504	/* */
505	/* to get a simple enumeration without assigning special numbers. */
506	/* */
507
508	#ifndef FT_ENC_TAG
509	#define FT_ENC_TAG( value, a, b, c, d ) \
510	value = ( ( (FT_UInt32)(a) << 24 ) \| \
511	( (FT_UInt32)(b) << 16 ) \| \
512	( (FT_UInt32)(c) << 8 ) \| \
513	(FT_UInt32)(d) )
514
515	#endif /* FT_ENC_TAG */
516
517
518	/*************************************************************************/
519	/* */
520	/* <Enum> */
521	/* FT_Encoding */
522	/* */
523	/* <Description> */
524	/* An enumeration used to specify character sets supported by */
525	/* charmaps. Used in the @FT_Select_Charmap API function. */
526	/* */
527	/* <Note> */
528	/* Despite the name, this enumeration lists specific character */
529	/* repertories (i.e., charsets), and not text encoding methods (e.g., */
530	/* UTF-8, UTF-16, GB2312_EUC, etc.). */
531	/* */
532	/* Because of 32-bit charcodes defined in Unicode (i.e., surrogates), */
533	/* all character codes must be expressed as FT_Longs. */
534	/* */
535	/* Other encodings might be defined in the future. */
536	/* */
537	/* <Values> */
538	/* FT_ENCODING_NONE :: */
539	/* The encoding value~0 is reserved. */
540	/* */
541	/* FT_ENCODING_UNICODE :: */
542	/* Corresponds to the Unicode character set. This value covers */
543	/* all versions of the Unicode repertoire, including ASCII and */
544	/* Latin-1. Most fonts include a Unicode charmap, but not all */
545	/* of them. */
546	/* */
547	/* FT_ENCODING_MS_SYMBOL :: */
548	/* Corresponds to the Microsoft Symbol encoding, used to encode */
549	/* mathematical symbols in the 32..255 character code range. For */
550	/* more information, see `http://www.ceviz.net/symbol.htm'. */
551	/* */
552	/* FT_ENCODING_SJIS :: */
553	/* Corresponds to Japanese SJIS encoding. More info at */
554	/* at `http://langsupport.japanreference.com/encoding.shtml'. */
555	/* See note on multi-byte encodings below. */
556	/* */
557	/* FT_ENCODING_GB2312 :: */
558	/* Corresponds to an encoding system for Simplified Chinese as used */
559	/* used in mainland China. */
560	/* */
561	/* FT_ENCODING_BIG5 :: */
562	/* Corresponds to an encoding system for Traditional Chinese as used */
563	/* in Taiwan and Hong Kong. */
564	/* */
565	/* FT_ENCODING_WANSUNG :: */
566	/* Corresponds to the Korean encoding system known as Wansung. */
567	/* For more information see */
568	/* `http://www.microsoft.com/typography/unicode/949.txt'. */
569	/* */
570	/* FT_ENCODING_JOHAB :: */
571	/* The Korean standard character set (KS~C 5601-1992), which */
572	/* corresponds to MS Windows code page 1361. This character set */
573	/* includes all possible Hangeul character combinations. */
574	/* */
575	/* FT_ENCODING_ADOBE_LATIN_1 :: */
576	/* Corresponds to a Latin-1 encoding as defined in a Type~1 */
577	/* PostScript font. It is limited to 256 character codes. */
578	/* */
579	/* FT_ENCODING_ADOBE_STANDARD :: */
580	/* Corresponds to the Adobe Standard encoding, as found in Type~1, */
581	/* CFF, and OpenType/CFF fonts. It is limited to 256 character */
582	/* codes. */
583	/* */
584	/* FT_ENCODING_ADOBE_EXPERT :: */
585	/* Corresponds to the Adobe Expert encoding, as found in Type~1, */
586	/* CFF, and OpenType/CFF fonts. It is limited to 256 character */
587	/* codes. */
588	/* */
589	/* FT_ENCODING_ADOBE_CUSTOM :: */
590	/* Corresponds to a custom encoding, as found in Type~1, CFF, and */
591	/* OpenType/CFF fonts. It is limited to 256 character codes. */
592	/* */
593	/* FT_ENCODING_APPLE_ROMAN :: */
594	/* Corresponds to the 8-bit Apple roman encoding. Many TrueType and */
595	/* OpenType fonts contain a charmap for this encoding, since older */
596	/* versions of Mac OS are able to use it. */
597	/* */
598	/* FT_ENCODING_OLD_LATIN_2 :: */
599	/* This value is deprecated and was never used nor reported by */
600	/* FreeType. Don't use or test for it. */
601	/* */
602	/* FT_ENCODING_MS_SJIS :: */
603	/* Same as FT_ENCODING_SJIS. Deprecated. */
604	/* */
605	/* FT_ENCODING_MS_GB2312 :: */
606	/* Same as FT_ENCODING_GB2312. Deprecated. */
607	/* */
608	/* FT_ENCODING_MS_BIG5 :: */
609	/* Same as FT_ENCODING_BIG5. Deprecated. */
610	/* */
611	/* FT_ENCODING_MS_WANSUNG :: */
612	/* Same as FT_ENCODING_WANSUNG. Deprecated. */
613	/* */
614	/* FT_ENCODING_MS_JOHAB :: */
615	/* Same as FT_ENCODING_JOHAB. Deprecated. */
616	/* */
617	/* <Note> */
618	/* By default, FreeType automatically synthesizes a Unicode charmap */
619	/* for PostScript fonts, using their glyph names dictionaries. */
620	/* However, it also reports the encodings defined explicitly in the */
621	/* font file, for the cases when they are needed, with the Adobe */
622	/* values as well. */
623	/* */
624	/* FT_ENCODING_NONE is set by the BDF and PCF drivers if the charmap */
625	/* is neither Unicode nor ISO-8859-1 (otherwise it is set to */
626	/* FT_ENCODING_UNICODE). Use @FT_Get_BDF_Charset_ID to find out which */
627	/* encoding is really present. If, for example, the `cs_registry' */
628	/* field is `KOI8' and the `cs_encoding' field is `R', the font is */
629	/* encoded in KOI8-R. */
630	/* */
631	/* FT_ENCODING_NONE is always set (with a single exception) by the */
632	/* winfonts driver. Use @FT_Get_WinFNT_Header and examine the */
633	/* `charset' field of the @FT_WinFNT_HeaderRec structure to find out */
634	/* which encoding is really present. For example, */
635	/* @FT_WinFNT_ID_CP1251 (204) means Windows code page 1251 (for */
636	/* Russian). */
637	/* */
638	/* FT_ENCODING_NONE is set if `platform_id' is @TT_PLATFORM_MACINTOSH */
639	/* and `encoding_id' is not @TT_MAC_ID_ROMAN (otherwise it is set to */
640	/* FT_ENCODING_APPLE_ROMAN). */
641	/* */
642	/* If `platform_id' is @TT_PLATFORM_MACINTOSH, use the function */
643	/* @FT_Get_CMap_Language_ID to query the Mac language ID which may be */
644	/* needed to be able to distinguish Apple encoding variants. See */
645	/* */
646	/* http://www.unicode.org/Public/MAPPINGS/VENDORS/APPLE/README.TXT */
647	/* */
648	/* to get an idea how to do that. Basically, if the language ID is~0, */
649	/* don't use it, otherwise subtract 1 from the language ID. Then */
650	/* examine `encoding_id'. If, for example, `encoding_id' is */
651	/* @TT_MAC_ID_ROMAN and the language ID (minus~1) is */
652	/* `TT_MAC_LANGID_GREEK', it is the Greek encoding, not Roman. */
653	/* @TT_MAC_ID_ARABIC with `TT_MAC_LANGID_FARSI' means the Farsi */
654	/* variant the Arabic encoding. */
655	/* */
656	typedef enum FT_Encoding_
657	{
658	FT_ENC_TAG( FT_ENCODING_NONE, 0, 0, 0, 0 ),
659
660	FT_ENC_TAG( FT_ENCODING_MS_SYMBOL, 's', 'y', 'm', 'b' ),
661	FT_ENC_TAG( FT_ENCODING_UNICODE, 'u', 'n', 'i', 'c' ),
662
663	FT_ENC_TAG( FT_ENCODING_SJIS, 's', 'j', 'i', 's' ),
664	FT_ENC_TAG( FT_ENCODING_GB2312, 'g', 'b', ' ', ' ' ),
665	FT_ENC_TAG( FT_ENCODING_BIG5, 'b', 'i', 'g', '5' ),
666	FT_ENC_TAG( FT_ENCODING_WANSUNG, 'w', 'a', 'n', 's' ),
667	FT_ENC_TAG( FT_ENCODING_JOHAB, 'j', 'o', 'h', 'a' ),
668
669	/* for backwards compatibility */
670	FT_ENCODING_MS_SJIS = FT_ENCODING_SJIS,
671	FT_ENCODING_MS_GB2312 = FT_ENCODING_GB2312,
672	FT_ENCODING_MS_BIG5 = FT_ENCODING_BIG5,
673	FT_ENCODING_MS_WANSUNG = FT_ENCODING_WANSUNG,
674	FT_ENCODING_MS_JOHAB = FT_ENCODING_JOHAB,
675
676	FT_ENC_TAG( FT_ENCODING_ADOBE_STANDARD, 'A', 'D', 'O', 'B' ),
677	FT_ENC_TAG( FT_ENCODING_ADOBE_EXPERT, 'A', 'D', 'B', 'E' ),
678	FT_ENC_TAG( FT_ENCODING_ADOBE_CUSTOM, 'A', 'D', 'B', 'C' ),
679	FT_ENC_TAG( FT_ENCODING_ADOBE_LATIN_1, 'l', 'a', 't', '1' ),
680
681	FT_ENC_TAG( FT_ENCODING_OLD_LATIN_2, 'l', 'a', 't', '2' ),
682
683	FT_ENC_TAG( FT_ENCODING_APPLE_ROMAN, 'a', 'r', 'm', 'n' )
684
685	} FT_Encoding;
686
687
688	/*************************************************************************/
689	/* */
690	/* <Enum> */
691	/* ft_encoding_xxx */
692	/* */
693	/* <Description> */
694	/* These constants are deprecated; use the corresponding @FT_Encoding */
695	/* values instead. */
696	/* */
697	#define ft_encoding_none FT_ENCODING_NONE
698	#define ft_encoding_unicode FT_ENCODING_UNICODE
699	#define ft_encoding_symbol FT_ENCODING_MS_SYMBOL
700	#define ft_encoding_latin_1 FT_ENCODING_ADOBE_LATIN_1
701	#define ft_encoding_latin_2 FT_ENCODING_OLD_LATIN_2
702	#define ft_encoding_sjis FT_ENCODING_SJIS
703	#define ft_encoding_gb2312 FT_ENCODING_GB2312
704	#define ft_encoding_big5 FT_ENCODING_BIG5
705	#define ft_encoding_wansung FT_ENCODING_WANSUNG
706	#define ft_encoding_johab FT_ENCODING_JOHAB
707
708	#define ft_encoding_adobe_standard FT_ENCODING_ADOBE_STANDARD
709	#define ft_encoding_adobe_expert FT_ENCODING_ADOBE_EXPERT
710	#define ft_encoding_adobe_custom FT_ENCODING_ADOBE_CUSTOM
711	#define ft_encoding_apple_roman FT_ENCODING_APPLE_ROMAN
712
713
714	/*************************************************************************/
715	/* */
716	/* <Struct> */
717	/* FT_CharMapRec */
718	/* */
719	/* <Description> */
720	/* The base charmap structure. */
721	/* */
722	/* <Fields> */
723	/* face :: A handle to the parent face object. */
724	/* */
725	/* encoding :: An @FT_Encoding tag identifying the charmap. Use */
726	/* this with @FT_Select_Charmap. */
727	/* */
728	/* platform_id :: An ID number describing the platform for the */
729	/* following encoding ID. This comes directly from */
730	/* the TrueType specification and should be emulated */
731	/* for other formats. */
732	/* */
733	/* encoding_id :: A platform specific encoding number. This also */
734	/* comes from the TrueType specification and should be */
735	/* emulated similarly. */
736	/* */
737	typedef struct FT_CharMapRec_
738	{
739	FT_Face face;
740	FT_Encoding encoding;
741	FT_UShort platform_id;
742	FT_UShort encoding_id;
743
744	} FT_CharMapRec;
745
746
747	/*************************************************************************/
748	/*************************************************************************/
749	/* */
750	/* B A S E O B J E C T C L A S S E S */
751	/* */
752	/*************************************************************************/
753	/*************************************************************************/
754
755
756	/*************************************************************************/
757	/* */
758	/* <Type> */
759	/* FT_Face_Internal */
760	/* */
761	/* <Description> */
762	/* An opaque handle to an `FT_Face_InternalRec' structure, used to */
763	/* model private data of a given @FT_Face object. */
764	/* */
765	/* This structure might change between releases of FreeType~2 and is */
766	/* not generally available to client applications. */
767	/* */
768	typedef struct FT_Face_InternalRec_* FT_Face_Internal;
769
770
771	/*************************************************************************/
772	/* */
773	/* <Struct> */
774	/* FT_FaceRec */
775	/* */
776	/* <Description> */
777	/* FreeType root face class structure. A face object models a */
778	/* typeface in a font file. */
779	/* */
780	/* <Fields> */
781	/* num_faces :: The number of faces in the font file. Some */
782	/* font formats can have multiple faces in */
783	/* a font file. */
784	/* */
785	/* face_index :: The index of the face in the font file. It */
786	/* is set to~0 if there is only one face in */
787	/* the font file. */
788	/* */
789	/* face_flags :: A set of bit flags that give important */
790	/* information about the face; see */
791	/* @FT_FACE_FLAG_XXX for the details. */
792	/* */
793	/* style_flags :: A set of bit flags indicating the style of */
794	/* the face; see @FT_STYLE_FLAG_XXX for the */
795	/* details. */
796	/* */
797	/* num_glyphs :: The number of glyphs in the face. If the */
798	/* face is scalable and has sbits (see */
799	/* `num_fixed_sizes'), it is set to the number */
800	/* of outline glyphs. */
801	/* */
802	/* For CID-keyed fonts, this value gives the */
803	/* highest CID used in the font. */
804	/* */
805	/* family_name :: The face's family name. This is an ASCII */
806	/* string, usually in English, which describes */
807	/* the typeface's family (like `Times New */
808	/* Roman', `Bodoni', `Garamond', etc). This */
809	/* is a least common denominator used to list */
810	/* fonts. Some formats (TrueType & OpenType) */
811	/* provide localized and Unicode versions of */
812	/* this string. Applications should use the */
813	/* format specific interface to access them. */
814	/* Can be NULL (e.g., in fonts embedded in a */
815	/* PDF file). */
816	/* */
817	/* style_name :: The face's style name. This is an ASCII */
818	/* string, usually in English, which describes */
819	/* the typeface's style (like `Italic', */
820	/* `Bold', `Condensed', etc). Not all font */
821	/* formats provide a style name, so this field */
822	/* is optional, and can be set to NULL. As */
823	/* for `family_name', some formats provide */
824	/* localized and Unicode versions of this */
825	/* string. Applications should use the format */
826	/* specific interface to access them. */
827	/* */
828	/* num_fixed_sizes :: The number of bitmap strikes in the face. */
829	/* Even if the face is scalable, there might */
830	/* still be bitmap strikes, which are called */
831	/* `sbits' in that case. */
832	/* */
833	/* available_sizes :: An array of @FT_Bitmap_Size for all bitmap */
834	/* strikes in the face. It is set to NULL if */
835	/* there is no bitmap strike. */
836	/* */
837	/* num_charmaps :: The number of charmaps in the face. */
838	/* */
839	/* charmaps :: An array of the charmaps of the face. */
840	/* */
841	/* generic :: A field reserved for client uses. See the */
842	/* @FT_Generic type description. */
843	/* */
844	/* bbox :: The font bounding box. Coordinates are */
845	/* expressed in font units (see */
846	/* `units_per_EM'). The box is large enough */
847	/* to contain any glyph from the font. Thus, */
848	/* `bbox.yMax' can be seen as the `maximal */
849	/* ascender', and `bbox.yMin' as the `minimal */
850	/* descender'. Only relevant for scalable */
851	/* formats. */
852	/* */
853	/* Note that the bounding box might be off by */
854	/* (at least) one pixel for hinted fonts. See */
855	/* @FT_Size_Metrics for further discussion. */
856	/* */
857	/* units_per_EM :: The number of font units per EM square for */
858	/* this face. This is typically 2048 for */
859	/* TrueType fonts, and 1000 for Type~1 fonts. */
860	/* Only relevant for scalable formats. */
861	/* */
862	/* ascender :: The typographic ascender of the face, */
863	/* expressed in font units. For font formats */
864	/* not having this information, it is set to */
865	/* `bbox.yMax'. Only relevant for scalable */
866	/* formats. */
867	/* */
868	/* descender :: The typographic descender of the face, */
869	/* expressed in font units. For font formats */
870	/* not having this information, it is set to */
871	/* `bbox.yMin'. Note that this field is */
872	/* usually negative. Only relevant for */
873	/* scalable formats. */
874	/* */
875	/* height :: The height is the vertical distance */
876	/* between two consecutive baselines, */
877	/* expressed in font units. It is always */
878	/* positive. Only relevant for scalable */
879	/* formats. */
880	/* */
881	/* max_advance_width :: The maximal advance width, in font units, */
882	/* for all glyphs in this face. This can be */
883	/* used to make word wrapping computations */
884	/* faster. Only relevant for scalable */
885	/* formats. */
886	/* */
887	/* max_advance_height :: The maximal advance height, in font units, */
888	/* for all glyphs in this face. This is only */
889	/* relevant for vertical layouts, and is set */
890	/* to `height' for fonts that do not provide */
891	/* vertical metrics. Only relevant for */
892	/* scalable formats. */
893	/* */
894	/* underline_position :: The position, in font units, of the */
895	/* underline line for this face. It is the */
896	/* center of the underlining stem. Only */
897	/* relevant for scalable formats. */
898	/* */
899	/* underline_thickness :: The thickness, in font units, of the */
900	/* underline for this face. Only relevant for */
901	/* scalable formats. */
902	/* */
903	/* glyph :: The face's associated glyph slot(s). */
904	/* */
905	/* size :: The current active size for this face. */
906	/* */
907	/* charmap :: The current active charmap for this face. */
908	/* */
909	/* <Note> */
910	/* Fields may be changed after a call to @FT_Attach_File or */
911	/* @FT_Attach_Stream. */
912	/* */
913	typedef struct FT_FaceRec_
914	{
915	FT_Long num_faces;
916	FT_Long face_index;
917
918	FT_Long face_flags;
919	FT_Long style_flags;
920
921	FT_Long num_glyphs;
922
923	FT_String* family_name;
924	FT_String* style_name;
925
926	FT_Int num_fixed_sizes;
927	FT_Bitmap_Size* available_sizes;
928
929	FT_Int num_charmaps;
930	FT_CharMap* charmaps;
931
932	FT_Generic generic;
933
934	/# The following member variables (down to `underline_thickness') /
935	/# are only relevant to scalable outlines; cf. @FT_Bitmap_Size /
936	/# for bitmap fonts. /
937	FT_BBox bbox;
938
939	FT_UShort units_per_EM;
940	FT_Short ascender;
941	FT_Short descender;
942	FT_Short height;
943
944	FT_Short max_advance_width;
945	FT_Short max_advance_height;
946
947	FT_Short underline_position;
948	FT_Short underline_thickness;
949
950	FT_GlyphSlot glyph;
951	FT_Size size;
952	FT_CharMap charmap;
953
954	/@private begin /
955
956	FT_Driver driver;
957	FT_Memory memory;
958	FT_Stream stream;
959
960	FT_ListRec sizes_list;
961
962	FT_Generic autohint;
963	void* extensions;
964
965	FT_Face_Internal internal;
966
967	/@private end /
968
969	} FT_FaceRec;
970
971
972	/*************************************************************************/
973	/* */
974	/* <Enum> */
975	/* FT_FACE_FLAG_XXX */
976	/* */
977	/* <Description> */
978	/* A list of bit flags used in the `face_flags' field of the */
979	/* @FT_FaceRec structure. They inform client applications of */
980	/* properties of the corresponding face. */
981	/* */
982	/* <Values> */
983	/* FT_FACE_FLAG_SCALABLE :: */
984	/* Indicates that the face contains outline glyphs. This doesn't */
985	/* prevent bitmap strikes, i.e., a face can have both this and */
986	/* and @FT_FACE_FLAG_FIXED_SIZES set. */
987	/* */
988	/* FT_FACE_FLAG_FIXED_SIZES :: */
989	/* Indicates that the face contains bitmap strikes. See also the */
990	/* `num_fixed_sizes' and `available_sizes' fields of @FT_FaceRec. */
991	/* */
992	/* FT_FACE_FLAG_FIXED_WIDTH :: */
993	/* Indicates that the face contains fixed-width characters (like */
994	/* Courier, Lucido, MonoType, etc.). */
995	/* */
996	/* FT_FACE_FLAG_SFNT :: */
997	/* Indicates that the face uses the `sfnt' storage scheme. For */
998	/* now, this means TrueType and OpenType. */
999	/* */
1000	/* FT_FACE_FLAG_HORIZONTAL :: */
1001	/* Indicates that the face contains horizontal glyph metrics. This */
1002	/* should be set for all common formats. */
1003	/* */
1004	/* FT_FACE_FLAG_VERTICAL :: */
1005	/* Indicates that the face contains vertical glyph metrics. This */
1006	/* is only available in some formats, not all of them. */
1007	/* */
1008	/* FT_FACE_FLAG_KERNING :: */
1009	/* Indicates that the face contains kerning information. If set, */
1010	/* the kerning distance can be retrieved through the function */
1011	/* @FT_Get_Kerning. Otherwise the function always return the */
1012	/* vector (0,0). Note that FreeType doesn't handle kerning data */
1013	/* from the `GPOS' table (as present in some OpenType fonts). */
1014	/* */
1015	/* FT_FACE_FLAG_FAST_GLYPHS :: */
1016	/* THIS FLAG IS DEPRECATED. DO NOT USE OR TEST IT. */
1017	/* */
1018	/* FT_FACE_FLAG_MULTIPLE_MASTERS :: */
1019	/* Indicates that the font contains multiple masters and is capable */
1020	/* of interpolating between them. See the multiple-masters */
1021	/* specific API for details. */
1022	/* */
1023	/* FT_FACE_FLAG_GLYPH_NAMES :: */
1024	/* Indicates that the font contains glyph names that can be */
1025	/* retrieved through @FT_Get_Glyph_Name. Note that some TrueType */
1026	/* fonts contain broken glyph name tables. Use the function */
1027	/* @FT_Has_PS_Glyph_Names when needed. */
1028	/* */
1029	/* FT_FACE_FLAG_EXTERNAL_STREAM :: */
1030	/* Used internally by FreeType to indicate that a face's stream was */
1031	/* provided by the client application and should not be destroyed */
1032	/* when @FT_Done_Face is called. Don't read or test this flag. */
1033	/* */
1034	/* FT_FACE_FLAG_HINTER :: */
1035	/* Set if the font driver has a hinting machine of its own. For */
1036	/* example, with TrueType fonts, it makes sense to use data from */
1037	/* the SFNT `gasp' table only if the native TrueType hinting engine */
1038	/* (with the bytecode interpreter) is available and active. */
1039	/* */
1040	/* FT_FACE_FLAG_CID_KEYED :: */
1041	/* Set if the font is CID-keyed. In that case, the font is not */
1042	/* accessed by glyph indices but by CID values. For subsetted */
1043	/* CID-keyed fonts this has the consequence that not all index */
1044	/* values are a valid argument to FT_Load_Glyph. Only the CID */
1045	/* values for which corresponding glyphs in the subsetted font */
1046	/* exist make FT_Load_Glyph return successfully; in all other cases */
1047	/* you get an `FT_Err_Invalid_Argument' error. */
1048	/* */
1049	/* Note that CID-keyed fonts which are in an SFNT wrapper don't */
1050	/* have this flag set since the glyphs are accessed in the normal */
1051	/* way (using contiguous indices); the `CID-ness' isn't visible to */
1052	/* the application. */
1053	/* */
1054	/* FT_FACE_FLAG_TRICKY :: */
1055	/* Set if the font is `tricky', this is, it always needs the */
1056	/* font format's native hinting engine to get a reasonable result. */
1057	/* A typical example is the Chinese font `mingli.ttf' which uses */
1058	/* TrueType bytecode instructions to move and scale all of its */
1059	/* subglyphs. */
1060	/* */
1061	/* It is not possible to autohint such fonts using */
1062	/* @FT_LOAD_FORCE_AUTOHINT; it will also ignore */
1063	/* @FT_LOAD_NO_HINTING. You have to set both FT_LOAD_NO_HINTING */
1064	/* and @FT_LOAD_NO_AUTOHINT to really disable hinting; however, you */
1065	/* probably never want this except for demonstration purposes. */
1066	/* */
1067	/* Currently, there are six TrueType fonts in the list of tricky */
1068	/* fonts; they are hard-coded in file `ttobjs.c'. */
1069	/* */
1070	#define FT_FACE_FLAG_SCALABLE ( 1L << 0 )
1071	#define FT_FACE_FLAG_FIXED_SIZES ( 1L << 1 )
1072	#define FT_FACE_FLAG_FIXED_WIDTH ( 1L << 2 )
1073	#define FT_FACE_FLAG_SFNT ( 1L << 3 )
1074	#define FT_FACE_FLAG_HORIZONTAL ( 1L << 4 )
1075	#define FT_FACE_FLAG_VERTICAL ( 1L << 5 )
1076	#define FT_FACE_FLAG_KERNING ( 1L << 6 )
1077	#define FT_FACE_FLAG_FAST_GLYPHS ( 1L << 7 )
1078	#define FT_FACE_FLAG_MULTIPLE_MASTERS ( 1L << 8 )
1079	#define FT_FACE_FLAG_GLYPH_NAMES ( 1L << 9 )
1080	#define FT_FACE_FLAG_EXTERNAL_STREAM ( 1L << 10 )
1081	#define FT_FACE_FLAG_HINTER ( 1L << 11 )
1082	#define FT_FACE_FLAG_CID_KEYED ( 1L << 12 )
1083	#define FT_FACE_FLAG_TRICKY ( 1L << 13 )
1084
1085
1086	/*************************************************************************
1087	*
1088	* @macro:
1089	* FT_HAS_HORIZONTAL( face )
1090	*
1091	* @description:
1092	* A macro that returns true whenever a face object contains
1093	* horizontal metrics (this is true for all font formats though).
1094	*
1095	* @also:
1096	* @FT_HAS_VERTICAL can be used to check for vertical metrics.
1097	*
1098	*/
1099	#define FT_HAS_HORIZONTAL( face ) \
1100	( face->face_flags & FT_FACE_FLAG_HORIZONTAL )
1101
1102
1103	/*************************************************************************
1104	*
1105	* @macro:
1106	* FT_HAS_VERTICAL( face )
1107	*
1108	* @description:
1109	* A macro that returns true whenever a face object contains vertical
1110	* metrics.
1111	*
1112	*/
1113	#define FT_HAS_VERTICAL( face ) \
1114	( face->face_flags & FT_FACE_FLAG_VERTICAL )
1115
1116
1117	/*************************************************************************
1118	*
1119	* @macro:
1120	* FT_HAS_KERNING( face )
1121	*
1122	* @description:
1123	* A macro that returns true whenever a face object contains kerning
1124	* data that can be accessed with @FT_Get_Kerning.
1125	*
1126	*/
1127	#define FT_HAS_KERNING( face ) \
1128	( face->face_flags & FT_FACE_FLAG_KERNING )
1129
1130
1131	/*************************************************************************
1132	*
1133	* @macro:
1134	* FT_IS_SCALABLE( face )
1135	*
1136	* @description:
1137	* A macro that returns true whenever a face object contains a scalable
1138	* font face (true for TrueType, Type~1, Type~42, CID, OpenType/CFF,
1139	* and PFR font formats.
1140	*
1141	*/
1142	#define FT_IS_SCALABLE( face ) \
1143	( face->face_flags & FT_FACE_FLAG_SCALABLE )
1144
1145
1146	/*************************************************************************
1147	*
1148	* @macro:
1149	* FT_IS_SFNT( face )
1150	*
1151	* @description:
1152	* A macro that returns true whenever a face object contains a font
1153	* whose format is based on the SFNT storage scheme. This usually
1154	* means: TrueType fonts, OpenType fonts, as well as SFNT-based embedded
1155	* bitmap fonts.
1156	*
1157	* If this macro is true, all functions defined in @FT_SFNT_NAMES_H and
1158	* @FT_TRUETYPE_TABLES_H are available.
1159	*
1160	*/
1161	#define FT_IS_SFNT( face ) \
1162	( face->face_flags & FT_FACE_FLAG_SFNT )
1163
1164
1165	/*************************************************************************
1166	*
1167	* @macro:
1168	* FT_IS_FIXED_WIDTH( face )
1169	*
1170	* @description:
1171	* A macro that returns true whenever a face object contains a font face
1172	* that contains fixed-width (or `monospace', `fixed-pitch', etc.)
1173	* glyphs.
1174	*
1175	*/
1176	#define FT_IS_FIXED_WIDTH( face ) \
1177	( face->face_flags & FT_FACE_FLAG_FIXED_WIDTH )
1178
1179
1180	/*************************************************************************
1181	*
1182	* @macro:
1183	* FT_HAS_FIXED_SIZES( face )
1184	*
1185	* @description:
1186	* A macro that returns true whenever a face object contains some
1187	* embedded bitmaps. See the `available_sizes' field of the
1188	* @FT_FaceRec structure.
1189	*
1190	*/
1191	#define FT_HAS_FIXED_SIZES( face ) \
1192	( face->face_flags & FT_FACE_FLAG_FIXED_SIZES )
1193
1194
1195	/*************************************************************************
1196	*
1197	* @macro:
1198	* FT_HAS_FAST_GLYPHS( face )
1199	*
1200	* @description:
1201	* Deprecated.
1202	*
1203	*/
1204	#define FT_HAS_FAST_GLYPHS( face ) 0
1205
1206
1207	/*************************************************************************
1208	*
1209	* @macro:
1210	* FT_HAS_GLYPH_NAMES( face )
1211	*
1212	* @description:
1213	* A macro that returns true whenever a face object contains some glyph
1214	* names that can be accessed through @FT_Get_Glyph_Name.
1215	*
1216	*/
1217	#define FT_HAS_GLYPH_NAMES( face ) \
1218	( face->face_flags & FT_FACE_FLAG_GLYPH_NAMES )
1219
1220
1221	/*************************************************************************
1222	*
1223	* @macro:
1224	* FT_HAS_MULTIPLE_MASTERS( face )
1225	*
1226	* @description:
1227	* A macro that returns true whenever a face object contains some
1228	* multiple masters. The functions provided by @FT_MULTIPLE_MASTERS_H
1229	* are then available to choose the exact design you want.
1230	*
1231	*/
1232	#define FT_HAS_MULTIPLE_MASTERS( face ) \
1233	( face->face_flags & FT_FACE_FLAG_MULTIPLE_MASTERS )
1234
1235
1236	/*************************************************************************
1237	*
1238	* @macro:
1239	* FT_IS_CID_KEYED( face )
1240	*
1241	* @description:
1242	* A macro that returns true whenever a face object contains a CID-keyed
1243	* font. See the discussion of @FT_FACE_FLAG_CID_KEYED for more
1244	* details.
1245	*
1246	* If this macro is true, all functions defined in @FT_CID_H are
1247	* available.
1248	*
1249	*/
1250	#define FT_IS_CID_KEYED( face ) \
1251	( face->face_flags & FT_FACE_FLAG_CID_KEYED )
1252
1253
1254	/*************************************************************************
1255	*
1256	* @macro:
1257	* FT_IS_TRICKY( face )
1258	*
1259	* @description:
1260	* A macro that returns true whenever a face represents a `tricky' font.
1261	* See the discussion of @FT_FACE_FLAG_TRICKY for more details.
1262	*
1263	*/
1264	#define FT_IS_TRICKY( face ) \
1265	( face->face_flags & FT_FACE_FLAG_TRICKY )
1266
1267
1268	/*************************************************************************/
1269	/* */
1270	/* <Const> */
1271	/* FT_STYLE_FLAG_XXX */
1272	/* */
1273	/* <Description> */
1274	/* A list of bit-flags used to indicate the style of a given face. */
1275	/* These are used in the `style_flags' field of @FT_FaceRec. */
1276	/* */
1277	/* <Values> */
1278	/* FT_STYLE_FLAG_ITALIC :: */
1279	/* Indicates that a given face style is italic or oblique. */
1280	/* */
1281	/* FT_STYLE_FLAG_BOLD :: */
1282	/* Indicates that a given face is bold. */
1283	/* */
1284	/* <Note> */
1285	/* The style information as provided by FreeType is very basic. More */
1286	/* details are beyond the scope and should be done on a higher level */
1287	/* (for example, by analyzing various fields of the `OS/2' table in */
1288	/* SFNT based fonts). */
1289	/* */
1290	#define FT_STYLE_FLAG_ITALIC ( 1 << 0 )
1291	#define FT_STYLE_FLAG_BOLD ( 1 << 1 )
1292
1293
1294	/*************************************************************************/
1295	/* */
1296	/* <Type> */
1297	/* FT_Size_Internal */
1298	/* */
1299	/* <Description> */
1300	/* An opaque handle to an `FT_Size_InternalRec' structure, used to */
1301	/* model private data of a given @FT_Size object. */
1302	/* */
1303	typedef struct FT_Size_InternalRec_* FT_Size_Internal;
1304
1305
1306	/*************************************************************************/
1307	/* */
1308	/* <Struct> */
1309	/* FT_Size_Metrics */
1310	/* */
1311	/* <Description> */
1312	/* The size metrics structure gives the metrics of a size object. */
1313	/* */
1314	/* <Fields> */
1315	/* x_ppem :: The width of the scaled EM square in pixels, hence */
1316	/* the term `ppem' (pixels per EM). It is also */
1317	/* referred to as `nominal width'. */
1318	/* */
1319	/* y_ppem :: The height of the scaled EM square in pixels, */
1320	/* hence the term `ppem' (pixels per EM). It is also */
1321	/* referred to as `nominal height'. */
1322	/* */
1323	/* x_scale :: A 16.16 fractional scaling value used to convert */
1324	/* horizontal metrics from font units to 26.6 */
1325	/* fractional pixels. Only relevant for scalable */
1326	/* font formats. */
1327	/* */
1328	/* y_scale :: A 16.16 fractional scaling value used to convert */
1329	/* vertical metrics from font units to 26.6 */
1330	/* fractional pixels. Only relevant for scalable */
1331	/* font formats. */
1332	/* */
1333	/* ascender :: The ascender in 26.6 fractional pixels. See */
1334	/* @FT_FaceRec for the details. */
1335	/* */
1336	/* descender :: The descender in 26.6 fractional pixels. See */
1337	/* @FT_FaceRec for the details. */
1338	/* */
1339	/* height :: The height in 26.6 fractional pixels. See */
1340	/* @FT_FaceRec for the details. */
1341	/* */
1342	/* max_advance :: The maximal advance width in 26.6 fractional */
1343	/* pixels. See @FT_FaceRec for the details. */
1344	/* */
1345	/* <Note> */
1346	/* The scaling values, if relevant, are determined first during a */
1347	/* size changing operation. The remaining fields are then set by the */
1348	/* driver. For scalable formats, they are usually set to scaled */
1349	/* values of the corresponding fields in @FT_FaceRec. */
1350	/* */
1351	/* Note that due to glyph hinting, these values might not be exact */
1352	/* for certain fonts. Thus they must be treated as unreliable */
1353	/* with an error margin of at least one pixel! */
1354	/* */
1355	/* Indeed, the only way to get the exact metrics is to render _all_ */
1356	/* glyphs. As this would be a definite performance hit, it is up to */
1357	/* client applications to perform such computations. */
1358	/* */
1359	/* The FT_Size_Metrics structure is valid for bitmap fonts also. */
1360	/* */
1361	typedef struct FT_Size_Metrics_
1362	{
1363	FT_UShort x_ppem; /* horizontal pixels per EM */
1364	FT_UShort y_ppem; /* vertical pixels per EM */
1365
1366	FT_Fixed x_scale; /* scaling values used to convert font */
1367	FT_Fixed y_scale; /* units to 26.6 fractional pixels */
1368
1369	FT_Pos ascender; /* ascender in 26.6 frac. pixels */
1370	FT_Pos descender; /* descender in 26.6 frac. pixels */
1371	FT_Pos height; /* text height in 26.6 frac. pixels */
1372	FT_Pos max_advance; /* max horizontal advance, in 26.6 pixels */
1373
1374	} FT_Size_Metrics;
1375
1376
1377	/*************************************************************************/
1378	/* */
1379	/* <Struct> */
1380	/* FT_SizeRec */
1381	/* */
1382	/* <Description> */
1383	/* FreeType root size class structure. A size object models a face */
1384	/* object at a given size. */
1385	/* */
1386	/* <Fields> */
1387	/* face :: Handle to the parent face object. */
1388	/* */
1389	/* generic :: A typeless pointer, which is unused by the FreeType */
1390	/* library or any of its drivers. It can be used by */
1391	/* client applications to link their own data to each size */
1392	/* object. */
1393	/* */
1394	/* metrics :: Metrics for this size object. This field is read-only. */
1395	/* */
1396	typedef struct FT_SizeRec_
1397	{
1398	FT_Face face; /* parent face object */
1399	FT_Generic generic; /* generic pointer for client uses */
1400	FT_Size_Metrics metrics; /* size metrics */
1401	FT_Size_Internal internal;
1402
1403	} FT_SizeRec;
1404
1405
1406	/*************************************************************************/
1407	/* */
1408	/* <Struct> */
1409	/* FT_SubGlyph */
1410	/* */
1411	/* <Description> */
1412	/* The subglyph structure is an internal object used to describe */
1413	/* subglyphs (for example, in the case of composites). */
1414	/* */
1415	/* <Note> */
1416	/* The subglyph implementation is not part of the high-level API, */
1417	/* hence the forward structure declaration. */
1418	/* */
1419	/* You can however retrieve subglyph information with */
1420	/* @FT_Get_SubGlyph_Info. */
1421	/* */
1422	typedef struct FT_SubGlyphRec_* FT_SubGlyph;
1423
1424
1425	/*************************************************************************/
1426	/* */
1427	/* <Type> */
1428	/* FT_Slot_Internal */
1429	/* */
1430	/* <Description> */
1431	/* An opaque handle to an `FT_Slot_InternalRec' structure, used to */
1432	/* model private data of a given @FT_GlyphSlot object. */
1433	/* */
1434	typedef struct FT_Slot_InternalRec_* FT_Slot_Internal;
1435
1436
1437	/*************************************************************************/
1438	/* */
1439	/* <Struct> */
1440	/* FT_GlyphSlotRec */
1441	/* */
1442	/* <Description> */
1443	/* FreeType root glyph slot class structure. A glyph slot is a */
1444	/* container where individual glyphs can be loaded, be they in */
1445	/* outline or bitmap format. */
1446	/* */
1447	/* <Fields> */
1448	/* library :: A handle to the FreeType library instance */
1449	/* this slot belongs to. */
1450	/* */
1451	/* face :: A handle to the parent face object. */
1452	/* */
1453	/* next :: In some cases (like some font tools), several */
1454	/* glyph slots per face object can be a good */
1455	/* thing. As this is rare, the glyph slots are */
1456	/* listed through a direct, single-linked list */
1457	/* using its `next' field. */
1458	/* */
1459	/* generic :: A typeless pointer which is unused by the */
1460	/* FreeType library or any of its drivers. It */
1461	/* can be used by client applications to link */
1462	/* their own data to each glyph slot object. */
1463	/* */
1464	/* metrics :: The metrics of the last loaded glyph in the */
1465	/* slot. The returned values depend on the last */
1466	/* load flags (see the @FT_Load_Glyph API */
1467	/* function) and can be expressed either in 26.6 */
1468	/* fractional pixels or font units. */
1469	/* */
1470	/* Note that even when the glyph image is */
1471	/* transformed, the metrics are not. */
1472	/* */
1473	/* linearHoriAdvance :: The advance width of the unhinted glyph. */
1474	/* Its value is expressed in 16.16 fractional */
1475	/* pixels, unless @FT_LOAD_LINEAR_DESIGN is set */
1476	/* when loading the glyph. This field can be */
1477	/* important to perform correct WYSIWYG layout. */
1478	/* Only relevant for outline glyphs. */
1479	/* */
1480	/* linearVertAdvance :: The advance height of the unhinted glyph. */
1481	/* Its value is expressed in 16.16 fractional */
1482	/* pixels, unless @FT_LOAD_LINEAR_DESIGN is set */
1483	/* when loading the glyph. This field can be */
1484	/* important to perform correct WYSIWYG layout. */
1485	/* Only relevant for outline glyphs. */
1486	/* */
1487	/* advance :: This is the transformed advance width for the */
1488	/* glyph. */
1489	/* */
1490	/* format :: This field indicates the format of the image */
1491	/* contained in the glyph slot. Typically */
1492	/* @FT_GLYPH_FORMAT_BITMAP, */
1493	/* @FT_GLYPH_FORMAT_OUTLINE, or */
1494	/* @FT_GLYPH_FORMAT_COMPOSITE, but others are */
1495	/* possible. */
1496	/* */
1497	/* bitmap :: This field is used as a bitmap descriptor */
1498	/* when the slot format is */
1499	/* @FT_GLYPH_FORMAT_BITMAP. Note that the */
1500	/* address and content of the bitmap buffer can */
1501	/* change between calls of @FT_Load_Glyph and a */
1502	/* few other functions. */
1503	/* */
1504	/* bitmap_left :: This is the bitmap's left bearing expressed */
1505	/* in integer pixels. Of course, this is only */
1506	/* valid if the format is */
1507	/* @FT_GLYPH_FORMAT_BITMAP. */
1508	/* */
1509	/* bitmap_top :: This is the bitmap's top bearing expressed in */
1510	/* integer pixels. Remember that this is the */
1511	/* distance from the baseline to the top-most */
1512	/* glyph scanline, upwards y~coordinates being */
1513	/* positive. */
1514	/* */
1515	/* outline :: The outline descriptor for the current glyph */
1516	/* image if its format is */
1517	/* @FT_GLYPH_FORMAT_OUTLINE. Once a glyph is */
1518	/* loaded, `outline' can be transformed, */
1519	/* distorted, embolded, etc. However, it must */
1520	/* not be freed. */
1521	/* */
1522	/* num_subglyphs :: The number of subglyphs in a composite glyph. */
1523	/* This field is only valid for the composite */
1524	/* glyph format that should normally only be */
1525	/* loaded with the @FT_LOAD_NO_RECURSE flag. */
1526	/* For now this is internal to FreeType. */
1527	/* */
1528	/* subglyphs :: An array of subglyph descriptors for */
1529	/* composite glyphs. There are `num_subglyphs' */
1530	/* elements in there. Currently internal to */
1531	/* FreeType. */
1532	/* */
1533	/* control_data :: Certain font drivers can also return the */
1534	/* control data for a given glyph image (e.g. */
1535	/* TrueType bytecode, Type~1 charstrings, etc.). */
1536	/* This field is a pointer to such data. */
1537	/* */
1538	/* control_len :: This is the length in bytes of the control */
1539	/* data. */
1540	/* */
1541	/* other :: Really wicked formats can use this pointer to */
1542	/* present their own glyph image to client */
1543	/* applications. Note that the application */
1544	/* needs to know about the image format. */
1545	/* */
1546	/* lsb_delta :: The difference between hinted and unhinted */
1547	/* left side bearing while autohinting is */
1548	/* active. Zero otherwise. */
1549	/* */
1550	/* rsb_delta :: The difference between hinted and unhinted */
1551	/* right side bearing while autohinting is */
1552	/* active. Zero otherwise. */
1553	/* */
1554	/* <Note> */
1555	/* If @FT_Load_Glyph is called with default flags (see */
1556	/* @FT_LOAD_DEFAULT) the glyph image is loaded in the glyph slot in */
1557	/* its native format (e.g., an outline glyph for TrueType and Type~1 */
1558	/* formats). */
1559	/* */
1560	/* This image can later be converted into a bitmap by calling */
1561	/* @FT_Render_Glyph. This function finds the current renderer for */
1562	/* the native image's format, then invokes it. */
1563	/* */
1564	/* The renderer is in charge of transforming the native image through */
1565	/* the slot's face transformation fields, then converting it into a */
1566	/* bitmap that is returned in `slot->bitmap'. */
1567	/* */
1568	/* Note that `slot->bitmap_left' and `slot->bitmap_top' are also used */
1569	/* to specify the position of the bitmap relative to the current pen */
1570	/* position (e.g., coordinates (0,0) on the baseline). Of course, */
1571	/* `slot->format' is also changed to @FT_GLYPH_FORMAT_BITMAP. */
1572	/* */
1573	/* <Note> */
1574	/* Here a small pseudo code fragment which shows how to use */
1575	/* `lsb_delta' and `rsb_delta': */
1576	/* */
1577	/* { */
1578	/* FT_Pos origin_x = 0; */
1579	/* FT_Pos prev_rsb_delta = 0; */
1580	/* */
1581	/* */
1582	/* for all glyphs do */
1583	/* <compute kern between current and previous glyph and add it to */
1584	/* `origin_x'> */
1585	/* */
1586	/* <load glyph with `FT_Load_Glyph'> */
1587	/* */
1588	/* if ( prev_rsb_delta - face->glyph->lsb_delta >= 32 ) */
1589	/* origin_x -= 64; */
1590	/* else if ( prev_rsb_delta - face->glyph->lsb_delta < -32 ) */
1591	/* origin_x += 64; */
1592	/* */
1593	/* prev_rsb_delta = face->glyph->rsb_delta; */
1594	/* */
1595	/* <save glyph image, or render glyph, or ...> */
1596	/* */
1597	/* origin_x += face->glyph->advance.x; */
1598	/* endfor */
1599	/* } */
1600	/* */
1601	typedef struct FT_GlyphSlotRec_
1602	{
1603	FT_Library library;
1604	FT_Face face;
1605	FT_GlyphSlot next;
1606	FT_UInt reserved; /* retained for binary compatibility */
1607	FT_Generic generic;
1608
1609	FT_Glyph_Metrics metrics;
1610	FT_Fixed linearHoriAdvance;
1611	FT_Fixed linearVertAdvance;
1612	FT_Vector advance;
1613
1614	FT_Glyph_Format format;
1615
1616	FT_Bitmap bitmap;
1617	FT_Int bitmap_left;
1618	FT_Int bitmap_top;
1619
1620	FT_Outline outline;
1621
1622	FT_UInt num_subglyphs;
1623	FT_SubGlyph subglyphs;
1624
1625	void* control_data;
1626	long control_len;
1627
1628	FT_Pos lsb_delta;
1629	FT_Pos rsb_delta;
1630
1631	void* other;
1632
1633	FT_Slot_Internal internal;
1634
1635	} FT_GlyphSlotRec;
1636
1637
1638	/*************************************************************************/
1639	/*************************************************************************/
1640	/* */
1641	/* F U N C T I O N S */
1642	/* */
1643	/*************************************************************************/
1644	/*************************************************************************/
1645
1646
1647	/*************************************************************************/
1648	/* */
1649	/* <Function> */
1650	/* FT_Init_FreeType */
1651	/* */
1652	/* <Description> */
1653	/* Initialize a new FreeType library object. The set of modules */
1654	/* that are registered by this function is determined at build time. */
1655	/* */
1656	/* <Output> */
1657	/* alibrary :: A handle to a new library object. */
1658	/* */
1659	/* <Return> */
1660	/* FreeType error code. 0~means success. */
1661	/* */
1662	FT_EXPORT( FT_Error )
1663	FT_Init_FreeType( FT_Library *alibrary );
1664
1665
1666	/*************************************************************************/
1667	/* */
1668	/* <Function> */
1669	/* FT_Done_FreeType */
1670	/* */
1671	/* <Description> */
1672	/* Destroy a given FreeType library object and all of its children, */
1673	/* including resources, drivers, faces, sizes, etc. */
1674	/* */
1675	/* <Input> */
1676	/* library :: A handle to the target library object. */
1677	/* */
1678	/* <Return> */
1679	/* FreeType error code. 0~means success. */
1680	/* */
1681	FT_EXPORT( FT_Error )
1682	FT_Done_FreeType( FT_Library library );
1683
1684
1685	/*************************************************************************/
1686	/* */
1687	/* <Enum> */
1688	/* FT_OPEN_XXX */
1689	/* */
1690	/* <Description> */
1691	/* A list of bit-field constants used within the `flags' field of the */
1692	/* @FT_Open_Args structure. */
1693	/* */
1694	/* <Values> */
1695	/* FT_OPEN_MEMORY :: This is a memory-based stream. */
1696	/* */
1697	/* FT_OPEN_STREAM :: Copy the stream from the `stream' field. */
1698	/* */
1699	/* FT_OPEN_PATHNAME :: Create a new input stream from a C~path */
1700	/* name. */
1701	/* */
1702	/* FT_OPEN_DRIVER :: Use the `driver' field. */
1703	/* */
1704	/* FT_OPEN_PARAMS :: Use the `num_params' and `params' fields. */
1705	/* */
1706	/* ft_open_memory :: Deprecated; use @FT_OPEN_MEMORY instead. */
1707	/* */
1708	/* ft_open_stream :: Deprecated; use @FT_OPEN_STREAM instead. */
1709	/* */
1710	/* ft_open_pathname :: Deprecated; use @FT_OPEN_PATHNAME instead. */
1711	/* */
1712	/* ft_open_driver :: Deprecated; use @FT_OPEN_DRIVER instead. */
1713	/* */
1714	/* ft_open_params :: Deprecated; use @FT_OPEN_PARAMS instead. */
1715	/* */
1716	/* <Note> */
1717	/* The `FT_OPEN_MEMORY', `FT_OPEN_STREAM', and `FT_OPEN_PATHNAME' */
1718	/* flags are mutually exclusive. */
1719	/* */
1720	#define FT_OPEN_MEMORY 0x1
1721	#define FT_OPEN_STREAM 0x2
1722	#define FT_OPEN_PATHNAME 0x4
1723	#define FT_OPEN_DRIVER 0x8
1724	#define FT_OPEN_PARAMS 0x10
1725
1726	#define ft_open_memory FT_OPEN_MEMORY /* deprecated */
1727	#define ft_open_stream FT_OPEN_STREAM /* deprecated */
1728	#define ft_open_pathname FT_OPEN_PATHNAME /* deprecated */
1729	#define ft_open_driver FT_OPEN_DRIVER /* deprecated */
1730	#define ft_open_params FT_OPEN_PARAMS /* deprecated */
1731
1732
1733	/*************************************************************************/
1734	/* */
1735	/* <Struct> */
1736	/* FT_Parameter */
1737	/* */
1738	/* <Description> */
1739	/* A simple structure used to pass more or less generic parameters */
1740	/* to @FT_Open_Face. */
1741	/* */
1742	/* <Fields> */
1743	/* tag :: A four-byte identification tag. */
1744	/* */
1745	/* data :: A pointer to the parameter data. */
1746	/* */
1747	/* <Note> */
1748	/* The ID and function of parameters are driver-specific. */
1749	/* */
1750	typedef struct FT_Parameter_
1751	{
1752	FT_ULong tag;
1753	FT_Pointer data;
1754
1755	} FT_Parameter;
1756
1757
1758	/*************************************************************************/
1759	/* */
1760	/* <Struct> */
1761	/* FT_Open_Args */
1762	/* */
1763	/* <Description> */
1764	/* A structure used to indicate how to open a new font file or */
1765	/* stream. A pointer to such a structure can be used as a parameter */
1766	/* for the functions @FT_Open_Face and @FT_Attach_Stream. */
1767	/* */
1768	/* <Fields> */
1769	/* flags :: A set of bit flags indicating how to use the */
1770	/* structure. */
1771	/* */
1772	/* memory_base :: The first byte of the file in memory. */
1773	/* */
1774	/* memory_size :: The size in bytes of the file in memory. */
1775	/* */
1776	/* pathname :: A pointer to an 8-bit file pathname. */
1777	/* */
1778	/* stream :: A handle to a source stream object. */
1779	/* */
1780	/* driver :: This field is exclusively used by @FT_Open_Face; */
1781	/* it simply specifies the font driver to use to open */
1782	/* the face. If set to~0, FreeType tries to load the */
1783	/* face with each one of the drivers in its list. */
1784	/* */
1785	/* num_params :: The number of extra parameters. */
1786	/* */
1787	/* params :: Extra parameters passed to the font driver when */
1788	/* opening a new face. */
1789	/* */
1790	/* <Note> */
1791	/* The stream type is determined by the contents of `flags' which */
1792	/* are tested in the following order by @FT_Open_Face: */
1793	/* */
1794	/* If the `FT_OPEN_MEMORY' bit is set, assume that this is a */
1795	/* memory file of `memory_size' bytes, located at `memory_address'. */
1796	/* The data are are not copied, and the client is responsible for */
1797	/* releasing and destroying them _after_ the corresponding call to */
1798	/* @FT_Done_Face. */
1799	/* */
1800	/* Otherwise, if the `FT_OPEN_STREAM' bit is set, assume that a */
1801	/* custom input stream `stream' is used. */
1802	/* */
1803	/* Otherwise, if the `FT_OPEN_PATHNAME' bit is set, assume that this */
1804	/* is a normal file and use `pathname' to open it. */
1805	/* */
1806	/* If the `FT_OPEN_DRIVER' bit is set, @FT_Open_Face only tries to */
1807	/* open the file with the driver whose handler is in `driver'. */
1808	/* */
1809	/* If the `FT_OPEN_PARAMS' bit is set, the parameters given by */
1810	/* `num_params' and `params' is used. They are ignored otherwise. */
1811	/* */
1812	/* Ideally, both the `pathname' and `params' fields should be tagged */
1813	/* as `const'; this is missing for API backwards compatibility. In */
1814	/* other words, applications should treat them as read-only. */
1815	/* */
1816	typedef struct FT_Open_Args_
1817	{
1818	FT_UInt flags;
1819	const FT_Byte* memory_base;
1820	FT_Long memory_size;
1821	FT_String* pathname;
1822	FT_Stream stream;
1823	FT_Module driver;
1824	FT_Int num_params;
1825	FT_Parameter* params;
1826
1827	} FT_Open_Args;
1828
1829
1830	/*************************************************************************/
1831	/* */
1832	/* <Function> */
1833	/* FT_New_Face */
1834	/* */
1835	/* <Description> */
1836	/* This function calls @FT_Open_Face to open a font by its pathname. */
1837	/* */
1838	/* <InOut> */
1839	/* library :: A handle to the library resource. */
1840	/* */
1841	/* <Input> */
1842	/* pathname :: A path to the font file. */
1843	/* */
1844	/* face_index :: The index of the face within the font. The first */
1845	/* face has index~0. */
1846	/* */
1847	/* <Output> */
1848	/* aface :: A handle to a new face object. If `face_index' is */
1849	/* greater than or equal to zero, it must be non-NULL. */
1850	/* See @FT_Open_Face for more details. */
1851	/* */
1852	/* <Return> */
1853	/* FreeType error code. 0~means success. */
1854	/* */
1855	FT_EXPORT( FT_Error )
1856	FT_New_Face( FT_Library library,
1857	const char* filepathname,
1858	FT_Long face_index,
1859	FT_Face *aface );
1860
1861
1862	/*************************************************************************/
1863	/* */
1864	/* <Function> */
1865	/* FT_New_Memory_Face */
1866	/* */
1867	/* <Description> */
1868	/* This function calls @FT_Open_Face to open a font which has been */
1869	/* loaded into memory. */
1870	/* */
1871	/* <InOut> */
1872	/* library :: A handle to the library resource. */
1873	/* */
1874	/* <Input> */
1875	/* file_base :: A pointer to the beginning of the font data. */
1876	/* */
1877	/* file_size :: The size of the memory chunk used by the font data. */
1878	/* */
1879	/* face_index :: The index of the face within the font. The first */
1880	/* face has index~0. */
1881	/* */
1882	/* <Output> */
1883	/* aface :: A handle to a new face object. If `face_index' is */
1884	/* greater than or equal to zero, it must be non-NULL. */
1885	/* See @FT_Open_Face for more details. */
1886	/* */
1887	/* <Return> */
1888	/* FreeType error code. 0~means success. */
1889	/* */
1890	/* <Note> */
1891	/* You must not deallocate the memory before calling @FT_Done_Face. */
1892	/* */
1893	FT_EXPORT( FT_Error )
1894	FT_New_Memory_Face( FT_Library library,
1895	const FT_Byte* file_base,
1896	FT_Long file_size,
1897	FT_Long face_index,
1898	FT_Face *aface );
1899
1900
1901	/*************************************************************************/
1902	/* */
1903	/* <Function> */
1904	/* FT_Open_Face */
1905	/* */
1906	/* <Description> */
1907	/* Create a face object from a given resource described by */
1908	/* @FT_Open_Args. */
1909	/* */
1910	/* <InOut> */
1911	/* library :: A handle to the library resource. */
1912	/* */
1913	/* <Input> */
1914	/* args :: A pointer to an `FT_Open_Args' structure which must */
1915	/* be filled by the caller. */
1916	/* */
1917	/* face_index :: The index of the face within the font. The first */
1918	/* face has index~0. */
1919	/* */
1920	/* <Output> */
1921	/* aface :: A handle to a new face object. If `face_index' is */
1922	/* greater than or equal to zero, it must be non-NULL. */
1923	/* See note below. */
1924	/* */
1925	/* <Return> */
1926	/* FreeType error code. 0~means success. */
1927	/* */
1928	/* <Note> */
1929	/* Unlike FreeType 1.x, this function automatically creates a glyph */
1930	/* slot for the face object which can be accessed directly through */
1931	/* `face->glyph'. */
1932	/* */
1933	/* FT_Open_Face can be used to quickly check whether the font */
1934	/* format of a given font resource is supported by FreeType. If the */
1935	/* `face_index' field is negative, the function's return value is~0 */
1936	/* if the font format is recognized, or non-zero otherwise; */
1937	/* the function returns a more or less empty face handle in `aface' /
1938	/* (if `aface' isn't NULL). The only useful field in this special */
1939	/* case is `face->num_faces' which gives the number of faces within */
1940	/* the font file. After examination, the returned @FT_Face structure */
1941	/* should be deallocated with a call to @FT_Done_Face. */
1942	/* */
1943	/* Each new face object created with this function also owns a */
1944	/* default @FT_Size object, accessible as `face->size'. */
1945	/* */
1946	FT_EXPORT( FT_Error )
1947	FT_Open_Face( FT_Library library,
1948	const FT_Open_Args* args,
1949	FT_Long face_index,
1950	FT_Face *aface );
1951
1952
1953	/*************************************************************************/
1954	/* */
1955	/* <Function> */
1956	/* FT_Attach_File */
1957	/* */
1958	/* <Description> */
1959	/* This function calls @FT_Attach_Stream to attach a file. */
1960	/* */
1961	/* <InOut> */
1962	/* face :: The target face object. */
1963	/* */
1964	/* <Input> */
1965	/* filepathname :: The pathname. */
1966	/* */
1967	/* <Return> */
1968	/* FreeType error code. 0~means success. */
1969	/* */
1970	FT_EXPORT( FT_Error )
1971	FT_Attach_File( FT_Face face,
1972	const char* filepathname );
1973
1974
1975	/*************************************************************************/
1976	/* */
1977	/* <Function> */
1978	/* FT_Attach_Stream */
1979	/* */
1980	/* <Description> */
1981	/* `Attach' data to a face object. Normally, this is used to read */
1982	/* additional information for the face object. For example, you can */
1983	/* attach an AFM file that comes with a Type~1 font to get the */
1984	/* kerning values and other metrics. */
1985	/* */
1986	/* <InOut> */
1987	/* face :: The target face object. */
1988	/* */
1989	/* <Input> */
1990	/* parameters :: A pointer to @FT_Open_Args which must be filled by */
1991	/* the caller. */
1992	/* */
1993	/* <Return> */
1994	/* FreeType error code. 0~means success. */
1995	/* */
1996	/* <Note> */
1997	/* The meaning of the `attach' (i.e., what really happens when the */
1998	/* new file is read) is not fixed by FreeType itself. It really */
1999	/* depends on the font format (and thus the font driver). */
2000	/* */
2001	/* Client applications are expected to know what they are doing */
2002	/* when invoking this function. Most drivers simply do not implement */
2003	/* file attachments. */
2004	/* */
2005	FT_EXPORT( FT_Error )
2006	FT_Attach_Stream( FT_Face face,
2007	FT_Open_Args* parameters );
2008
2009
2010	/*************************************************************************/
2011	/* */
2012	/* <Function> */
2013	/* FT_Done_Face */
2014	/* */
2015	/* <Description> */
2016	/* Discard a given face object, as well as all of its child slots and */
2017	/* sizes. */
2018	/* */
2019	/* <Input> */
2020	/* face :: A handle to a target face object. */
2021	/* */
2022	/* <Return> */
2023	/* FreeType error code. 0~means success. */
2024	/* */
2025	FT_EXPORT( FT_Error )
2026	FT_Done_Face( FT_Face face );
2027
2028
2029	/*************************************************************************/
2030	/* */
2031	/* <Function> */
2032	/* FT_Select_Size */
2033	/* */
2034	/* <Description> */
2035	/* Select a bitmap strike. */
2036	/* */
2037	/* <InOut> */
2038	/* face :: A handle to a target face object. */
2039	/* */
2040	/* <Input> */
2041	/* strike_index :: The index of the bitmap strike in the */
2042	/* `available_sizes' field of @FT_FaceRec structure. */
2043	/* */
2044	/* <Return> */
2045	/* FreeType error code. 0~means success. */
2046	/* */
2047	FT_EXPORT( FT_Error )
2048	FT_Select_Size( FT_Face face,
2049	FT_Int strike_index );
2050
2051
2052	/*************************************************************************/
2053	/* */
2054	/* <Enum> */
2055	/* FT_Size_Request_Type */
2056	/* */
2057	/* <Description> */
2058	/* An enumeration type that lists the supported size request types. */
2059	/* */
2060	/* <Values> */
2061	/* FT_SIZE_REQUEST_TYPE_NOMINAL :: */
2062	/* The nominal size. The `units_per_EM' field of @FT_FaceRec is */
2063	/* used to determine both scaling values. */
2064	/* */
2065	/* FT_SIZE_REQUEST_TYPE_REAL_DIM :: */
2066	/* The real dimension. The sum of the the `Ascender' and (minus */
2067	/* of) the `Descender' fields of @FT_FaceRec are used to determine */
2068	/* both scaling values. */
2069	/* */
2070	/* FT_SIZE_REQUEST_TYPE_BBOX :: */
2071	/* The font bounding box. The width and height of the `bbox' field */
2072	/* of @FT_FaceRec are used to determine the horizontal and vertical */
2073	/* scaling value, respectively. */
2074	/* */
2075	/* FT_SIZE_REQUEST_TYPE_CELL :: */
2076	/* The `max_advance_width' field of @FT_FaceRec is used to */
2077	/* determine the horizontal scaling value; the vertical scaling */
2078	/* value is determined the same way as */
2079	/* @FT_SIZE_REQUEST_TYPE_REAL_DIM does. Finally, both scaling */
2080	/* values are set to the smaller one. This type is useful if you */
2081	/* want to specify the font size for, say, a window of a given */
2082	/* dimension and 80x24 cells. */
2083	/* */
2084	/* FT_SIZE_REQUEST_TYPE_SCALES :: */
2085	/* Specify the scaling values directly. */
2086	/* */
2087	/* <Note> */
2088	/* The above descriptions only apply to scalable formats. For bitmap */
2089	/* formats, the behaviour is up to the driver. */
2090	/* */
2091	/* See the note section of @FT_Size_Metrics if you wonder how size */
2092	/* requesting relates to scaling values. */
2093	/* */
2094	typedef enum FT_Size_Request_Type_
2095	{
2096	FT_SIZE_REQUEST_TYPE_NOMINAL,
2097	FT_SIZE_REQUEST_TYPE_REAL_DIM,
2098	FT_SIZE_REQUEST_TYPE_BBOX,
2099	FT_SIZE_REQUEST_TYPE_CELL,
2100	FT_SIZE_REQUEST_TYPE_SCALES,
2101
2102	FT_SIZE_REQUEST_TYPE_MAX
2103
2104	} FT_Size_Request_Type;
2105
2106
2107	/*************************************************************************/
2108	/* */
2109	/* <Struct> */
2110	/* FT_Size_RequestRec */
2111	/* */
2112	/* <Description> */
2113	/* A structure used to model a size request. */
2114	/* */
2115	/* <Fields> */
2116	/* type :: See @FT_Size_Request_Type. */
2117	/* */
2118	/* width :: The desired width. */
2119	/* */
2120	/* height :: The desired height. */
2121	/* */
2122	/* horiResolution :: The horizontal resolution. If set to zero, */
2123	/* `width' is treated as a 26.6 fractional pixel */
2124	/* value. */
2125	/* */
2126	/* vertResolution :: The vertical resolution. If set to zero, */
2127	/* `height' is treated as a 26.6 fractional pixel */
2128	/* value. */
2129	/* */
2130	/* <Note> */
2131	/* If `width' is zero, then the horizontal scaling value is set */
2132	/* equal to the vertical scaling value, and vice versa. */
2133	/* */
2134	typedef struct FT_Size_RequestRec_
2135	{
2136	FT_Size_Request_Type type;
2137	FT_Long width;
2138	FT_Long height;
2139	FT_UInt horiResolution;
2140	FT_UInt vertResolution;
2141
2142	} FT_Size_RequestRec;
2143
2144
2145	/*************************************************************************/
2146	/* */
2147	/* <Struct> */
2148	/* FT_Size_Request */
2149	/* */
2150	/* <Description> */
2151	/* A handle to a size request structure. */
2152	/* */
2153	typedef struct FT_Size_RequestRec_ *FT_Size_Request;
2154
2155
2156	/*************************************************************************/
2157	/* */
2158	/* <Function> */
2159	/* FT_Request_Size */
2160	/* */
2161	/* <Description> */
2162	/* Resize the scale of the active @FT_Size object in a face. */
2163	/* */
2164	/* <InOut> */
2165	/* face :: A handle to a target face object. */
2166	/* */
2167	/* <Input> */
2168	/* req :: A pointer to a @FT_Size_RequestRec. */
2169	/* */
2170	/* <Return> */
2171	/* FreeType error code. 0~means success. */
2172	/* */
2173	/* <Note> */
2174	/* Although drivers may select the bitmap strike matching the */
2175	/* request, you should not rely on this if you intend to select a */
2176	/* particular bitmap strike. Use @FT_Select_Size instead in that */
2177	/* case. */
2178	/* */
2179	FT_EXPORT( FT_Error )
2180	FT_Request_Size( FT_Face face,
2181	FT_Size_Request req );
2182
2183
2184	/*************************************************************************/
2185	/* */
2186	/* <Function> */
2187	/* FT_Set_Char_Size */
2188	/* */
2189	/* <Description> */
2190	/* This function calls @FT_Request_Size to request the nominal size */
2191	/* (in points). */
2192	/* */
2193	/* <InOut> */
2194	/* face :: A handle to a target face object. */
2195	/* */
2196	/* <Input> */
2197	/* char_width :: The nominal width, in 26.6 fractional points. */
2198	/* */
2199	/* char_height :: The nominal height, in 26.6 fractional points. */
2200	/* */
2201	/* horz_resolution :: The horizontal resolution in dpi. */
2202	/* */
2203	/* vert_resolution :: The vertical resolution in dpi. */
2204	/* */
2205	/* <Return> */
2206	/* FreeType error code. 0~means success. */
2207	/* */
2208	/* <Note> */
2209	/* If either the character width or height is zero, it is set equal */
2210	/* to the other value. */
2211	/* */
2212	/* If either the horizontal or vertical resolution is zero, it is set */
2213	/* equal to the other value. */
2214	/* */
2215	/* A character width or height smaller than 1pt is set to 1pt; if */
2216	/* both resolution values are zero, they are set to 72dpi. */
2217	/* */
2218	/* Don't use this function if you are using the FreeType cache API. */
2219	/* */
2220	FT_EXPORT( FT_Error )
2221	FT_Set_Char_Size( FT_Face face,
2222	FT_F26Dot6 char_width,
2223	FT_F26Dot6 char_height,
2224	FT_UInt horz_resolution,
2225	FT_UInt vert_resolution );
2226
2227
2228	/*************************************************************************/
2229	/* */
2230	/* <Function> */
2231	/* FT_Set_Pixel_Sizes */
2232	/* */
2233	/* <Description> */
2234	/* This function calls @FT_Request_Size to request the nominal size */
2235	/* (in pixels). */
2236	/* */
2237	/* <InOut> */
2238	/* face :: A handle to the target face object. */
2239	/* */
2240	/* <Input> */
2241	/* pixel_width :: The nominal width, in pixels. */
2242	/* */
2243	/* pixel_height :: The nominal height, in pixels. */
2244	/* */
2245	/* <Return> */
2246	/* FreeType error code. 0~means success. */
2247	/* */
2248	FT_EXPORT( FT_Error )
2249	FT_Set_Pixel_Sizes( FT_Face face,
2250	FT_UInt pixel_width,
2251	FT_UInt pixel_height );
2252
2253
2254	/*************************************************************************/
2255	/* */
2256	/* <Function> */
2257	/* FT_Load_Glyph */
2258	/* */
2259	/* <Description> */
2260	/* A function used to load a single glyph into the glyph slot of a */
2261	/* face object. */
2262	/* */
2263	/* <InOut> */
2264	/* face :: A handle to the target face object where the glyph */
2265	/* is loaded. */
2266	/* */
2267	/* <Input> */
2268	/* glyph_index :: The index of the glyph in the font file. For */
2269	/* CID-keyed fonts (either in PS or in CFF format) */
2270	/* this argument specifies the CID value. */
2271	/* */
2272	/* load_flags :: A flag indicating what to load for this glyph. The */
2273	/* @FT_LOAD_XXX constants can be used to control the */
2274	/* glyph loading process (e.g., whether the outline */
2275	/* should be scaled, whether to load bitmaps or not, */
2276	/* whether to hint the outline, etc). */
2277	/* */
2278	/* <Return> */
2279	/* FreeType error code. 0~means success. */
2280	/* */
2281	/* <Note> */
2282	/* The loaded glyph may be transformed. See @FT_Set_Transform for */
2283	/* the details. */
2284	/* */
2285	/* For subsetted CID-keyed fonts, `FT_Err_Invalid_Argument' is */
2286	/* returned for invalid CID values (this is, for CID values which */
2287	/* don't have a corresponding glyph in the font). See the discussion */
2288	/* of the @FT_FACE_FLAG_CID_KEYED flag for more details. */
2289	/* */
2290	FT_EXPORT( FT_Error )
2291	FT_Load_Glyph( FT_Face face,
2292	FT_UInt glyph_index,
2293	FT_Int32 load_flags );
2294
2295
2296	/*************************************************************************/
2297	/* */
2298	/* <Function> */
2299	/* FT_Load_Char */
2300	/* */
2301	/* <Description> */
2302	/* A function used to load a single glyph into the glyph slot of a */
2303	/* face object, according to its character code. */
2304	/* */
2305	/* <InOut> */
2306	/* face :: A handle to a target face object where the glyph */
2307	/* is loaded. */
2308	/* */
2309	/* <Input> */
2310	/* char_code :: The glyph's character code, according to the */
2311	/* current charmap used in the face. */
2312	/* */
2313	/* load_flags :: A flag indicating what to load for this glyph. The */
2314	/* @FT_LOAD_XXX constants can be used to control the */
2315	/* glyph loading process (e.g., whether the outline */
2316	/* should be scaled, whether to load bitmaps or not, */
2317	/* whether to hint the outline, etc). */
2318	/* */
2319	/* <Return> */
2320	/* FreeType error code. 0~means success. */
2321	/* */
2322	/* <Note> */
2323	/* This function simply calls @FT_Get_Char_Index and @FT_Load_Glyph. */
2324	/* */
2325	FT_EXPORT( FT_Error )
2326	FT_Load_Char( FT_Face face,
2327	FT_ULong char_code,
2328	FT_Int32 load_flags );
2329
2330
2331	/*************************************************************************
2332	*
2333	* @enum:
2334	* FT_LOAD_XXX
2335	*
2336	* @description:
2337	* A list of bit-field constants used with @FT_Load_Glyph to indicate
2338	* what kind of operations to perform during glyph loading.
2339	*
2340	* @values:
2341	* FT_LOAD_DEFAULT ::
2342	* Corresponding to~0, this value is used as the default glyph load
2343	* operation. In this case, the following happens:
2344	*
2345	* 1. FreeType looks for a bitmap for the glyph corresponding to the
2346	* face's current size. If one is found, the function returns.
2347	* The bitmap data can be accessed from the glyph slot (see note
2348	* below).
2349	*
2350	* 2. If no embedded bitmap is searched or found, FreeType looks for a
2351	* scalable outline. If one is found, it is loaded from the font
2352	* file, scaled to device pixels, then `hinted' to the pixel grid
2353	* in order to optimize it. The outline data can be accessed from
2354	* the glyph slot (see note below).
2355	*
2356	* Note that by default, the glyph loader doesn't render outlines into
2357	* bitmaps. The following flags are used to modify this default
2358	* behaviour to more specific and useful cases.
2359	*
2360	* FT_LOAD_NO_SCALE ::
2361	* Don't scale the outline glyph loaded, but keep it in font units.
2362	*
2363	* This flag implies @FT_LOAD_NO_HINTING and @FT_LOAD_NO_BITMAP, and
2364	* unsets @FT_LOAD_RENDER.
2365	*
2366	* FT_LOAD_NO_HINTING ::
2367	* Disable hinting. This generally generates `blurrier' bitmap glyph
2368	* when the glyph is rendered in any of the anti-aliased modes. See
2369	* also the note below.
2370	*
2371	* This flag is implied by @FT_LOAD_NO_SCALE.
2372	*
2373	* FT_LOAD_RENDER ::
2374	* Call @FT_Render_Glyph after the glyph is loaded. By default, the
2375	* glyph is rendered in @FT_RENDER_MODE_NORMAL mode. This can be
2376	* overridden by @FT_LOAD_TARGET_XXX or @FT_LOAD_MONOCHROME.
2377	*
2378	* This flag is unset by @FT_LOAD_NO_SCALE.
2379	*
2380	* FT_LOAD_NO_BITMAP ::
2381	* Ignore bitmap strikes when loading. Bitmap-only fonts ignore this
2382	* flag.
2383	*
2384	* @FT_LOAD_NO_SCALE always sets this flag.
2385	*
2386	* FT_LOAD_VERTICAL_LAYOUT ::
2387	* Load the glyph for vertical text layout. _Don't_ use it as it is
2388	* problematic currently.
2389	*
2390	* FT_LOAD_FORCE_AUTOHINT ::
2391	* Indicates that the auto-hinter is preferred over the font's native
2392	* hinter. See also the note below.
2393	*
2394	* FT_LOAD_CROP_BITMAP ::
2395	* Indicates that the font driver should crop the loaded bitmap glyph
2396	* (i.e., remove all space around its black bits). Not all drivers
2397	* implement this.
2398	*
2399	* FT_LOAD_PEDANTIC ::
2400	* Indicates that the font driver should perform pedantic verifications
2401	* during glyph loading. This is mostly used to detect broken glyphs
2402	* in fonts. By default, FreeType tries to handle broken fonts also.
2403	*
2404	* FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH ::
2405	* Indicates that the font driver should ignore the global advance
2406	* width defined in the font. By default, that value is used as the
2407	* advance width for all glyphs when the face has
2408	* @FT_FACE_FLAG_FIXED_WIDTH set.
2409	*
2410	* This flag exists for historical reasons (to support buggy CJK
2411	* fonts).
2412	*
2413	* FT_LOAD_NO_RECURSE ::
2414	* This flag is only used internally. It merely indicates that the
2415	* font driver should not load composite glyphs recursively. Instead,
2416	* it should set the `num_subglyph' and `subglyphs' values of the
2417	* glyph slot accordingly, and set `glyph->format' to
2418	* @FT_GLYPH_FORMAT_COMPOSITE.
2419	*
2420	* The description of sub-glyphs is not available to client
2421	* applications for now.
2422	*
2423	* This flag implies @FT_LOAD_NO_SCALE and @FT_LOAD_IGNORE_TRANSFORM.
2424	*
2425	* FT_LOAD_IGNORE_TRANSFORM ::
2426	* Indicates that the transform matrix set by @FT_Set_Transform should
2427	* be ignored.
2428	*
2429	* FT_LOAD_MONOCHROME ::
2430	* This flag is used with @FT_LOAD_RENDER to indicate that you want to
2431	* render an outline glyph to a 1-bit monochrome bitmap glyph, with
2432	* 8~pixels packed into each byte of the bitmap data.
2433	*
2434	* Note that this has no effect on the hinting algorithm used. You
2435	* should rather use @FT_LOAD_TARGET_MONO so that the
2436	* monochrome-optimized hinting algorithm is used.
2437	*
2438	* FT_LOAD_LINEAR_DESIGN ::
2439	* Indicates that the `linearHoriAdvance' and `linearVertAdvance'
2440	* fields of @FT_GlyphSlotRec should be kept in font units. See
2441	* @FT_GlyphSlotRec for details.
2442	*
2443	* FT_LOAD_NO_AUTOHINT ::
2444	* Disable auto-hinter. See also the note below.
2445	*
2446	* @note:
2447	* By default, hinting is enabled and the font's native hinter (see
2448	* @FT_FACE_FLAG_HINTER) is preferred over the auto-hinter. You can
2449	* disable hinting by setting @FT_LOAD_NO_HINTING or change the
2450	* precedence by setting @FT_LOAD_FORCE_AUTOHINT. You can also set
2451	* @FT_LOAD_NO_AUTOHINT in case you don't want the auto-hinter to be
2452	* used at all.
2453	*
2454	* See the description of @FT_FACE_FLAG_TRICKY for a special exception
2455	* (affecting only a handful of Asian fonts).
2456	*
2457	* Besides deciding which hinter to use, you can also decide which
2458	* hinting algorithm to use. See @FT_LOAD_TARGET_XXX for details.
2459	*/
2460	#define FT_LOAD_DEFAULT 0x0
2461	#define FT_LOAD_NO_SCALE 0x1
2462	#define FT_LOAD_NO_HINTING 0x2
2463	#define FT_LOAD_RENDER 0x4
2464	#define FT_LOAD_NO_BITMAP 0x8
2465	#define FT_LOAD_VERTICAL_LAYOUT 0x10
2466	#define FT_LOAD_FORCE_AUTOHINT 0x20
2467	#define FT_LOAD_CROP_BITMAP 0x40
2468	#define FT_LOAD_PEDANTIC 0x80
2469	#define FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH 0x200
2470	#define FT_LOAD_NO_RECURSE 0x400
2471	#define FT_LOAD_IGNORE_TRANSFORM 0x800
2472	#define FT_LOAD_MONOCHROME 0x1000
2473	#define FT_LOAD_LINEAR_DESIGN 0x2000
2474	#define FT_LOAD_NO_AUTOHINT 0x8000U
2475
2476	/* */
2477
2478	/* used internally only by certain font drivers! */
2479	#define FT_LOAD_ADVANCE_ONLY 0x100
2480	#define FT_LOAD_SBITS_ONLY 0x4000
2481
2482
2483	/**************************************************************************
2484	*
2485	* @enum:
2486	* FT_LOAD_TARGET_XXX
2487	*
2488	* @description:
2489	* A list of values that are used to select a specific hinting algorithm
2490	* to use by the hinter. You should OR one of these values to your
2491	* `load_flags' when calling @FT_Load_Glyph.
2492	*
2493	* Note that font's native hinters may ignore the hinting algorithm you
2494	* have specified (e.g., the TrueType bytecode interpreter). You can set
2495	* @FT_LOAD_FORCE_AUTOHINT to ensure that the auto-hinter is used.
2496	*
2497	* Also note that @FT_LOAD_TARGET_LIGHT is an exception, in that it
2498	* always implies @FT_LOAD_FORCE_AUTOHINT.
2499	*
2500	* @values:
2501	* FT_LOAD_TARGET_NORMAL ::
2502	* This corresponds to the default hinting algorithm, optimized for
2503	* standard gray-level rendering. For monochrome output, use
2504	* @FT_LOAD_TARGET_MONO instead.
2505	*
2506	* FT_LOAD_TARGET_LIGHT ::
2507	* A lighter hinting algorithm for non-monochrome modes. Many
2508	* generated glyphs are more fuzzy but better resemble its original
2509	* shape. A bit like rendering on Mac OS~X.
2510	*
2511	* As a special exception, this target implies @FT_LOAD_FORCE_AUTOHINT.
2512	*
2513	* FT_LOAD_TARGET_MONO ::
2514	* Strong hinting algorithm that should only be used for monochrome
2515	* output. The result is probably unpleasant if the glyph is rendered
2516	* in non-monochrome modes.
2517	*
2518	* FT_LOAD_TARGET_LCD ::
2519	* A variant of @FT_LOAD_TARGET_NORMAL optimized for horizontally
2520	* decimated LCD displays.
2521	*
2522	* FT_LOAD_TARGET_LCD_V ::
2523	* A variant of @FT_LOAD_TARGET_NORMAL optimized for vertically
2524	* decimated LCD displays.
2525	*
2526	* @note:
2527	* You should use only _one_ of the FT_LOAD_TARGET_XXX values in your
2528	* `load_flags'. They can't be ORed.
2529	*
2530	* If @FT_LOAD_RENDER is also set, the glyph is rendered in the
2531	* corresponding mode (i.e., the mode which matches the used algorithm
2532	* best) unless @FT_LOAD_MONOCHROME is set.
2533	*
2534	* You can use a hinting algorithm that doesn't correspond to the same
2535	* rendering mode. As an example, it is possible to use the `light'
2536	* hinting algorithm and have the results rendered in horizontal LCD
2537	* pixel mode, with code like
2538	*
2539	* {
2540	* FT_Load_Glyph( face, glyph_index,
2541	* load_flags \| FT_LOAD_TARGET_LIGHT );
2542	*
2543	* FT_Render_Glyph( face->glyph, FT_RENDER_MODE_LCD );
2544	* }
2545	*/
2546
2547	#define FT_LOAD_TARGET_( x ) ( (FT_Int32)( (x) & 15 ) << 16 )
2548
2549	#define FT_LOAD_TARGET_NORMAL FT_LOAD_TARGET_( FT_RENDER_MODE_NORMAL )
2550	#define FT_LOAD_TARGET_LIGHT FT_LOAD_TARGET_( FT_RENDER_MODE_LIGHT )
2551	#define FT_LOAD_TARGET_MONO FT_LOAD_TARGET_( FT_RENDER_MODE_MONO )
2552	#define FT_LOAD_TARGET_LCD FT_LOAD_TARGET_( FT_RENDER_MODE_LCD )
2553	#define FT_LOAD_TARGET_LCD_V FT_LOAD_TARGET_( FT_RENDER_MODE_LCD_V )
2554
2555
2556	/**************************************************************************
2557	*
2558	* @macro:
2559	* FT_LOAD_TARGET_MODE
2560	*
2561	* @description:
2562	* Return the @FT_Render_Mode corresponding to a given
2563	* @FT_LOAD_TARGET_XXX value.
2564	*
2565	*/
2566
2567	#define FT_LOAD_TARGET_MODE( x ) ( (FT_Render_Mode)( ( (x) >> 16 ) & 15 ) )
2568
2569
2570	/*************************************************************************/
2571	/* */
2572	/* <Function> */
2573	/* FT_Set_Transform */
2574	/* */
2575	/* <Description> */
2576	/* A function used to set the transformation that is applied to glyph */
2577	/* images when they are loaded into a glyph slot through */
2578	/* @FT_Load_Glyph. */
2579	/* */
2580	/* <InOut> */
2581	/* face :: A handle to the source face object. */
2582	/* */
2583	/* <Input> */
2584	/* matrix :: A pointer to the transformation's 2x2 matrix. Use~0 for */
2585	/* the identity matrix. */
2586	/* delta :: A pointer to the translation vector. Use~0 for the null */
2587	/* vector. */
2588	/* */
2589	/* <Note> */
2590	/* The transformation is only applied to scalable image formats after */
2591	/* the glyph has been loaded. It means that hinting is unaltered by */
2592	/* the transformation and is performed on the character size given in */
2593	/* the last call to @FT_Set_Char_Size or @FT_Set_Pixel_Sizes. */
2594	/* */
2595	/* Note that this also transforms the `face.glyph.advance' field, but */
2596	/* not the values in `face.glyph.metrics'. */
2597	/* */
2598	FT_EXPORT( void )
2599	FT_Set_Transform( FT_Face face,
2600	FT_Matrix* matrix,
2601	FT_Vector* delta );
2602
2603
2604	/*************************************************************************/
2605	/* */
2606	/* <Enum> */
2607	/* FT_Render_Mode */
2608	/* */
2609	/* <Description> */
2610	/* An enumeration type that lists the render modes supported by */
2611	/* FreeType~2. Each mode corresponds to a specific type of scanline */
2612	/* conversion performed on the outline. */
2613	/* */
2614	/* For bitmap fonts the `bitmap->pixel_mode' field in the */
2615	/* @FT_GlyphSlotRec structure gives the format of the returned */
2616	/* bitmap. */
2617	/* */
2618	/* All modes except @FT_RENDER_MODE_MONO use 256 levels of opacity. */
2619	/* */
2620	/* <Values> */
2621	/* FT_RENDER_MODE_NORMAL :: */
2622	/* This is the default render mode; it corresponds to 8-bit */
2623	/* anti-aliased bitmaps. */
2624	/* */
2625	/* FT_RENDER_MODE_LIGHT :: */
2626	/* This is equivalent to @FT_RENDER_MODE_NORMAL. It is only */
2627	/* defined as a separate value because render modes are also used */
2628	/* indirectly to define hinting algorithm selectors. See */
2629	/* @FT_LOAD_TARGET_XXX for details. */
2630	/* */
2631	/* FT_RENDER_MODE_MONO :: */
2632	/* This mode corresponds to 1-bit bitmaps (with 2~levels of */
2633	/* opacity). */
2634	/* */
2635	/* FT_RENDER_MODE_LCD :: */
2636	/* This mode corresponds to horizontal RGB and BGR sub-pixel */
2637	/* displays, like LCD-screens. It produces 8-bit bitmaps that are */
2638	/* 3~times the width of the original glyph outline in pixels, and */
2639	/* which use the @FT_PIXEL_MODE_LCD mode. */
2640	/* */
2641	/* FT_RENDER_MODE_LCD_V :: */
2642	/* This mode corresponds to vertical RGB and BGR sub-pixel displays */
2643	/* (like PDA screens, rotated LCD displays, etc.). It produces */
2644	/* 8-bit bitmaps that are 3~times the height of the original */
2645	/* glyph outline in pixels and use the @FT_PIXEL_MODE_LCD_V mode. */
2646	/* */
2647	/* <Note> */
2648	/* The LCD-optimized glyph bitmaps produced by FT_Render_Glyph can be */
2649	/* filtered to reduce color-fringes by using @FT_Library_SetLcdFilter */
2650	/* (not active in the default builds). It is up to the caller to */
2651	/* either call @FT_Library_SetLcdFilter (if available) or do the */
2652	/* filtering itself. */
2653	/* */
2654	typedef enum FT_Render_Mode_
2655	{
2656	FT_RENDER_MODE_NORMAL = 0,
2657	FT_RENDER_MODE_LIGHT,
2658	FT_RENDER_MODE_MONO,
2659	FT_RENDER_MODE_LCD,
2660	FT_RENDER_MODE_LCD_V,
2661
2662	FT_RENDER_MODE_MAX
2663
2664	} FT_Render_Mode;
2665
2666
2667	/*************************************************************************/
2668	/* */
2669	/* <Enum> */
2670	/* ft_render_mode_xxx */
2671	/* */
2672	/* <Description> */
2673	/* These constants are deprecated. Use the corresponding */
2674	/* @FT_Render_Mode values instead. */
2675	/* */
2676	/* <Values> */
2677	/* ft_render_mode_normal :: see @FT_RENDER_MODE_NORMAL */
2678	/* ft_render_mode_mono :: see @FT_RENDER_MODE_MONO */
2679	/* */
2680	#define ft_render_mode_normal FT_RENDER_MODE_NORMAL
2681	#define ft_render_mode_mono FT_RENDER_MODE_MONO
2682
2683
2684	/*************************************************************************/
2685	/* */
2686	/* <Function> */
2687	/* FT_Render_Glyph */
2688	/* */
2689	/* <Description> */
2690	/* Convert a given glyph image to a bitmap. It does so by inspecting */
2691	/* the glyph image format, finding the relevant renderer, and */
2692	/* invoking it. */
2693	/* */
2694	/* <InOut> */
2695	/* slot :: A handle to the glyph slot containing the image to */
2696	/* convert. */
2697	/* */
2698	/* <Input> */
2699	/* render_mode :: This is the render mode used to render the glyph */
2700	/* image into a bitmap. See @FT_Render_Mode for a */
2701	/* list of possible values. */
2702	/* */
2703	/* <Return> */
2704	/* FreeType error code. 0~means success. */
2705	/* */
2706	FT_EXPORT( FT_Error )
2707	FT_Render_Glyph( FT_GlyphSlot slot,
2708	FT_Render_Mode render_mode );
2709
2710
2711	/*************************************************************************/
2712	/* */
2713	/* <Enum> */
2714	/* FT_Kerning_Mode */
2715	/* */
2716	/* <Description> */
2717	/* An enumeration used to specify which kerning values to return in */
2718	/* @FT_Get_Kerning. */
2719	/* */
2720	/* <Values> */
2721	/* FT_KERNING_DEFAULT :: Return scaled and grid-fitted kerning */
2722	/* distances (value is~0). */
2723	/* */
2724	/* FT_KERNING_UNFITTED :: Return scaled but un-grid-fitted kerning */
2725	/* distances. */
2726	/* */
2727	/* FT_KERNING_UNSCALED :: Return the kerning vector in original font */
2728	/* units. */
2729	/* */
2730	typedef enum FT_Kerning_Mode_
2731	{
2732	FT_KERNING_DEFAULT = 0,
2733	FT_KERNING_UNFITTED,
2734	FT_KERNING_UNSCALED
2735
2736	} FT_Kerning_Mode;
2737
2738
2739	/*************************************************************************/
2740	/* */
2741	/* <Const> */
2742	/* ft_kerning_default */
2743	/* */
2744	/* <Description> */
2745	/* This constant is deprecated. Please use @FT_KERNING_DEFAULT */
2746	/* instead. */
2747	/* */
2748	#define ft_kerning_default FT_KERNING_DEFAULT
2749
2750
2751	/*************************************************************************/
2752	/* */
2753	/* <Const> */
2754	/* ft_kerning_unfitted */
2755	/* */
2756	/* <Description> */
2757	/* This constant is deprecated. Please use @FT_KERNING_UNFITTED */
2758	/* instead. */
2759	/* */
2760	#define ft_kerning_unfitted FT_KERNING_UNFITTED
2761
2762
2763	/*************************************************************************/
2764	/* */
2765	/* <Const> */
2766	/* ft_kerning_unscaled */
2767	/* */
2768	/* <Description> */
2769	/* This constant is deprecated. Please use @FT_KERNING_UNSCALED */
2770	/* instead. */
2771	/* */
2772	#define ft_kerning_unscaled FT_KERNING_UNSCALED
2773
2774
2775	/*************************************************************************/
2776	/* */
2777	/* <Function> */
2778	/* FT_Get_Kerning */
2779	/* */
2780	/* <Description> */
2781	/* Return the kerning vector between two glyphs of a same face. */
2782	/* */
2783	/* <Input> */
2784	/* face :: A handle to a source face object. */
2785	/* */
2786	/* left_glyph :: The index of the left glyph in the kern pair. */
2787	/* */
2788	/* right_glyph :: The index of the right glyph in the kern pair. */
2789	/* */
2790	/* kern_mode :: See @FT_Kerning_Mode for more information. */
2791	/* Determines the scale and dimension of the returned */
2792	/* kerning vector. */
2793	/* */
2794	/* <Output> */
2795	/* akerning :: The kerning vector. This is either in font units */
2796	/* or in pixels (26.6 format) for scalable formats, */
2797	/* and in pixels for fixed-sizes formats. */
2798	/* */
2799	/* <Return> */
2800	/* FreeType error code. 0~means success. */
2801	/* */
2802	/* <Note> */
2803	/* Only horizontal layouts (left-to-right & right-to-left) are */
2804	/* supported by this method. Other layouts, or more sophisticated */
2805	/* kernings, are out of the scope of this API function -- they can be */
2806	/* implemented through format-specific interfaces. */
2807	/* */
2808	FT_EXPORT( FT_Error )
2809	FT_Get_Kerning( FT_Face face,
2810	FT_UInt left_glyph,
2811	FT_UInt right_glyph,
2812	FT_UInt kern_mode,
2813	FT_Vector *akerning );
2814
2815
2816	/*************************************************************************/
2817	/* */
2818	/* <Function> */
2819	/* FT_Get_Track_Kerning */
2820	/* */
2821	/* <Description> */
2822	/* Return the track kerning for a given face object at a given size. */
2823	/* */
2824	/* <Input> */
2825	/* face :: A handle to a source face object. */
2826	/* */
2827	/* point_size :: The point size in 16.16 fractional points. */
2828	/* */
2829	/* degree :: The degree of tightness. */
2830	/* */
2831	/* <Output> */
2832	/* akerning :: The kerning in 16.16 fractional points. */
2833	/* */
2834	/* <Return> */
2835	/* FreeType error code. 0~means success. */
2836	/* */
2837	FT_EXPORT( FT_Error )
2838	FT_Get_Track_Kerning( FT_Face face,
2839	FT_Fixed point_size,
2840	FT_Int degree,
2841	FT_Fixed* akerning );
2842
2843
2844	/*************************************************************************/
2845	/* */
2846	/* <Function> */
2847	/* FT_Get_Glyph_Name */
2848	/* */
2849	/* <Description> */
2850	/* Retrieve the ASCII name of a given glyph in a face. This only */
2851	/* works for those faces where @FT_HAS_GLYPH_NAMES(face) returns~1. */
2852	/* */
2853	/* <Input> */
2854	/* face :: A handle to a source face object. */
2855	/* */
2856	/* glyph_index :: The glyph index. */
2857	/* */
2858	/* buffer_max :: The maximal number of bytes available in the */
2859	/* buffer. */
2860	/* */
2861	/* <Output> */
2862	/* buffer :: A pointer to a target buffer where the name is */
2863	/* copied to. */
2864	/* */
2865	/* <Return> */
2866	/* FreeType error code. 0~means success. */
2867	/* */
2868	/* <Note> */
2869	/* An error is returned if the face doesn't provide glyph names or if */
2870	/* the glyph index is invalid. In all cases of failure, the first */
2871	/* byte of `buffer' is set to~0 to indicate an empty name. */
2872	/* */
2873	/* The glyph name is truncated to fit within the buffer if it is too */
2874	/* long. The returned string is always zero-terminated. */
2875	/* */
2876	/* This function is not compiled within the library if the config */
2877	/* macro `FT_CONFIG_OPTION_NO_GLYPH_NAMES' is defined in */
2878	/* `include/freetype/config/ftoptions.h'. */
2879	/* */
2880	FT_EXPORT( FT_Error )
2881	FT_Get_Glyph_Name( FT_Face face,
2882	FT_UInt glyph_index,
2883	FT_Pointer buffer,
2884	FT_UInt buffer_max );
2885
2886
2887	/*************************************************************************/
2888	/* */
2889	/* <Function> */
2890	/* FT_Get_Postscript_Name */
2891	/* */
2892	/* <Description> */
2893	/* Retrieve the ASCII PostScript name of a given face, if available. */
2894	/* This only works with PostScript and TrueType fonts. */
2895	/* */
2896	/* <Input> */
2897	/* face :: A handle to the source face object. */
2898	/* */
2899	/* <Return> */
2900	/* A pointer to the face's PostScript name. NULL if unavailable. */
2901	/* */
2902	/* <Note> */
2903	/* The returned pointer is owned by the face and is destroyed with */
2904	/* it. */
2905	/* */
2906	FT_EXPORT( const char* )
2907	FT_Get_Postscript_Name( FT_Face face );
2908
2909
2910	/*************************************************************************/
2911	/* */
2912	/* <Function> */
2913	/* FT_Select_Charmap */
2914	/* */
2915	/* <Description> */
2916	/* Select a given charmap by its encoding tag (as listed in */
2917	/* `freetype.h'). */
2918	/* */
2919	/* <InOut> */
2920	/* face :: A handle to the source face object. */
2921	/* */
2922	/* <Input> */
2923	/* encoding :: A handle to the selected encoding. */
2924	/* */
2925	/* <Return> */
2926	/* FreeType error code. 0~means success. */
2927	/* */
2928	/* <Note> */
2929	/* This function returns an error if no charmap in the face */
2930	/* corresponds to the encoding queried here. */
2931	/* */
2932	/* Because many fonts contain more than a single cmap for Unicode */
2933	/* encoding, this function has some special code to select the one */
2934	/* which covers Unicode best (`best' in the sense that a UCS-4 cmap */
2935	/* is preferred to a UCS-2 cmap). It is thus preferable to */
2936	/* @FT_Set_Charmap in this case. */
2937	/* */
2938	FT_EXPORT( FT_Error )
2939	FT_Select_Charmap( FT_Face face,
2940	FT_Encoding encoding );
2941
2942
2943	/*************************************************************************/
2944	/* */
2945	/* <Function> */
2946	/* FT_Set_Charmap */
2947	/* */
2948	/* <Description> */
2949	/* Select a given charmap for character code to glyph index mapping. */
2950	/* */
2951	/* <InOut> */
2952	/* face :: A handle to the source face object. */
2953	/* */
2954	/* <Input> */
2955	/* charmap :: A handle to the selected charmap. */
2956	/* */
2957	/* <Return> */
2958	/* FreeType error code. 0~means success. */
2959	/* */
2960	/* <Note> */
2961	/* This function returns an error if the charmap is not part of */
2962	/* the face (i.e., if it is not listed in the `face->charmaps' */
2963	/* table). */
2964	/* */
2965	/* It also fails if a type~14 charmap is selected. */
2966	/* */
2967	FT_EXPORT( FT_Error )
2968	FT_Set_Charmap( FT_Face face,
2969	FT_CharMap charmap );
2970
2971
2972	/*************************************************************************
2973	*
2974	* @function:
2975	* FT_Get_Charmap_Index
2976	*
2977	* @description:
2978	* Retrieve index of a given charmap.
2979	*
2980	* @input:
2981	* charmap ::
2982	* A handle to a charmap.
2983	*
2984	* @return:
2985	* The index into the array of character maps within the face to which
2986	* `charmap' belongs.
2987	*
2988	*/
2989	FT_EXPORT( FT_Int )
2990	FT_Get_Charmap_Index( FT_CharMap charmap );
2991
2992
2993	/*************************************************************************/
2994	/* */
2995	/* <Function> */
2996	/* FT_Get_Char_Index */
2997	/* */
2998	/* <Description> */
2999	/* Return the glyph index of a given character code. This function */
3000	/* uses a charmap object to do the mapping. */
3001	/* */
3002	/* <Input> */
3003	/* face :: A handle to the source face object. */
3004	/* */
3005	/* charcode :: The character code. */
3006	/* */
3007	/* <Return> */
3008	/* The glyph index. 0~means `undefined character code'. */
3009	/* */
3010	/* <Note> */
3011	/* If you use FreeType to manipulate the contents of font files */
3012	/* directly, be aware that the glyph index returned by this function */
3013	/* doesn't always correspond to the internal indices used within */
3014	/* the file. This is done to ensure that value~0 always corresponds */
3015	/* to the `missing glyph'. */
3016	/* */
3017	FT_EXPORT( FT_UInt )
3018	FT_Get_Char_Index( FT_Face face,
3019	FT_ULong charcode );
3020
3021
3022	/*************************************************************************/
3023	/* */
3024	/* <Function> */
3025	/* FT_Get_First_Char */
3026	/* */
3027	/* <Description> */
3028	/* This function is used to return the first character code in the */
3029	/* current charmap of a given face. It also returns the */
3030	/* corresponding glyph index. */
3031	/* */
3032	/* <Input> */
3033	/* face :: A handle to the source face object. */
3034	/* */
3035	/* <Output> */
3036	/* agindex :: Glyph index of first character code. 0~if charmap is */
3037	/* empty. */
3038	/* */
3039	/* <Return> */
3040	/* The charmap's first character code. */
3041	/* */
3042	/* <Note> */
3043	/* You should use this function with @FT_Get_Next_Char to be able to */
3044	/* parse all character codes available in a given charmap. The code */
3045	/* should look like this: */
3046	/* */
3047	/* { */
3048	/* FT_ULong charcode; */
3049	/* FT_UInt gindex; */
3050	/* */
3051	/* */
3052	/* charcode = FT_Get_First_Char( face, &gindex ); */
3053	/* while ( gindex != 0 ) */
3054	/* { */
3055	/* ... do something with (charcode,gindex) pair ... */
3056	/* */
3057	/* charcode = FT_Get_Next_Char( face, charcode, &gindex ); */
3058	/* } */
3059	/* } */
3060	/* */
3061	/* Note that `agindex' is set to~0 if the charmap is empty. The /
3062	/* result itself can be~0 in two cases: if the charmap is empty or */
3063	/* when the value~0 is the first valid character code. */
3064	/* */
3065	FT_EXPORT( FT_ULong )
3066	FT_Get_First_Char( FT_Face face,
3067	FT_UInt *agindex );
3068
3069
3070	/*************************************************************************/
3071	/* */
3072	/* <Function> */
3073	/* FT_Get_Next_Char */
3074	/* */
3075	/* <Description> */
3076	/* This function is used to return the next character code in the */
3077	/* current charmap of a given face following the value `char_code', */
3078	/* as well as the corresponding glyph index. */
3079	/* */
3080	/* <Input> */
3081	/* face :: A handle to the source face object. */
3082	/* char_code :: The starting character code. */
3083	/* */
3084	/* <Output> */
3085	/* agindex :: Glyph index of first character code. 0~if charmap */
3086	/* is empty. */
3087	/* */
3088	/* <Return> */
3089	/* The charmap's next character code. */
3090	/* */
3091	/* <Note> */
3092	/* You should use this function with @FT_Get_First_Char to walk */
3093	/* over all character codes available in a given charmap. See the */
3094	/* note for this function for a simple code example. */
3095	/* */
3096	/* Note that `agindex' is set to~0 when there are no more codes in /
3097	/* the charmap. */
3098	/* */
3099	FT_EXPORT( FT_ULong )
3100	FT_Get_Next_Char( FT_Face face,
3101	FT_ULong char_code,
3102	FT_UInt *agindex );
3103
3104
3105	/*************************************************************************/
3106	/* */
3107	/* <Function> */
3108	/* FT_Get_Name_Index */
3109	/* */
3110	/* <Description> */
3111	/* Return the glyph index of a given glyph name. This function uses */
3112	/* driver specific objects to do the translation. */
3113	/* */
3114	/* <Input> */
3115	/* face :: A handle to the source face object. */
3116	/* */
3117	/* glyph_name :: The glyph name. */
3118	/* */
3119	/* <Return> */
3120	/* The glyph index. 0~means `undefined character code'. */
3121	/* */
3122	FT_EXPORT( FT_UInt )
3123	FT_Get_Name_Index( FT_Face face,
3124	FT_String* glyph_name );
3125
3126
3127	/*************************************************************************
3128	*
3129	* @macro:
3130	* FT_SUBGLYPH_FLAG_XXX
3131	*
3132	* @description:
3133	* A list of constants used to describe subglyphs. Please refer to the
3134	* TrueType specification for the meaning of the various flags.
3135	*
3136	* @values:
3137	* FT_SUBGLYPH_FLAG_ARGS_ARE_WORDS ::
3138	* FT_SUBGLYPH_FLAG_ARGS_ARE_XY_VALUES ::
3139	* FT_SUBGLYPH_FLAG_ROUND_XY_TO_GRID ::
3140	* FT_SUBGLYPH_FLAG_SCALE ::
3141	* FT_SUBGLYPH_FLAG_XY_SCALE ::
3142	* FT_SUBGLYPH_FLAG_2X2 ::
3143	* FT_SUBGLYPH_FLAG_USE_MY_METRICS ::
3144	*
3145	*/
3146	#define FT_SUBGLYPH_FLAG_ARGS_ARE_WORDS 1
3147	#define FT_SUBGLYPH_FLAG_ARGS_ARE_XY_VALUES 2
3148	#define FT_SUBGLYPH_FLAG_ROUND_XY_TO_GRID 4
3149	#define FT_SUBGLYPH_FLAG_SCALE 8
3150	#define FT_SUBGLYPH_FLAG_XY_SCALE 0x40
3151	#define FT_SUBGLYPH_FLAG_2X2 0x80
3152	#define FT_SUBGLYPH_FLAG_USE_MY_METRICS 0x200
3153
3154
3155	/*************************************************************************
3156	*
3157	* @func:
3158	* FT_Get_SubGlyph_Info
3159	*
3160	* @description:
3161	* Retrieve a description of a given subglyph. Only use it if
3162	* `glyph->format' is @FT_GLYPH_FORMAT_COMPOSITE, or an error is
3163	* returned.
3164	*
3165	* @input:
3166	* glyph ::
3167	* The source glyph slot.
3168	*
3169	* sub_index ::
3170	* The index of subglyph. Must be less than `glyph->num_subglyphs'.
3171	*
3172	* @output:
3173	* p_index ::
3174	* The glyph index of the subglyph.
3175	*
3176	* p_flags ::
3177	* The subglyph flags, see @FT_SUBGLYPH_FLAG_XXX.
3178	*
3179	* p_arg1 ::
3180	* The subglyph's first argument (if any).
3181	*
3182	* p_arg2 ::
3183	* The subglyph's second argument (if any).
3184	*
3185	* p_transform ::
3186	* The subglyph transformation (if any).
3187	*
3188	* @return:
3189	* FreeType error code. 0~means success.
3190	*
3191	* @note:
3192	* The values of `p_arg1', `p_arg2', and `*p_transform' must be
3193	* interpreted depending on the flags returned in `*p_flags'. See the
3194	* TrueType specification for details.
3195	*
3196	*/
3197	FT_EXPORT( FT_Error )
3198	FT_Get_SubGlyph_Info( FT_GlyphSlot glyph,
3199	FT_UInt sub_index,
3200	FT_Int *p_index,
3201	FT_UInt *p_flags,
3202	FT_Int *p_arg1,
3203	FT_Int *p_arg2,
3204	FT_Matrix *p_transform );
3205
3206
3207	/*************************************************************************/
3208	/* */
3209	/* <Enum> */
3210	/* FT_FSTYPE_XXX */
3211	/* */
3212	/* <Description> */
3213	/* A list of bit flags used in the `fsType' field of the OS/2 table */
3214	/* in a TrueType or OpenType font and the `FSType' entry in a */
3215	/* PostScript font. These bit flags are returned by */
3216	/* @FT_Get_FSType_Flags; they inform client applications of embedding */
3217	/* and subsetting restrictions associated with a font. */
3218	/* */
3219	/* See http://www.adobe.com/devnet/acrobat/pdfs/FontPolicies.pdf for */
3220	/* more details. */
3221	/* */
3222	/* <Values> */
3223	/* FT_FSTYPE_INSTALLABLE_EMBEDDING :: */
3224	/* Fonts with no fsType bit set may be embedded and permanently */
3225	/* installed on the remote system by an application. */
3226	/* */
3227	/* FT_FSTYPE_RESTRICTED_LICENSE_EMBEDDING :: */
3228	/* Fonts that have only this bit set must not be modified, embedded */
3229	/* or exchanged in any manner without first obtaining permission of */
3230	/* the font software copyright owner. */
3231	/* */
3232	/* FT_FSTYPE_PREVIEW_AND_PRINT_EMBEDDING :: */
3233	/* If this bit is set, the font may be embedded and temporarily */
3234	/* loaded on the remote system. Documents containing Preview & */
3235	/* Print fonts must be opened `read-only'; no edits can be applied */
3236	/* to the document. */
3237	/* */
3238	/* FT_FSTYPE_EDITABLE_EMBEDDING :: */
3239	/* If this bit is set, the font may be embedded but must only be */
3240	/* installed temporarily on other systems. In contrast to Preview */
3241	/* & Print fonts, documents containing editable fonts may be opened */
3242	/* for reading, editing is permitted, and changes may be saved. */
3243	/* */
3244	/* FT_FSTYPE_NO_SUBSETTING :: */
3245	/* If this bit is set, the font may not be subsetted prior to */
3246	/* embedding. */
3247	/* */
3248	/* FT_FSTYPE_BITMAP_EMBEDDING_ONLY :: */
3249	/* If this bit is set, only bitmaps contained in the font may be */
3250	/* embedded; no outline data may be embedded. If there are no */
3251	/* bitmaps available in the font, then the font is unembeddable. */
3252	/* */
3253	/* <Note> */
3254	/* While the fsType flags can indicate that a font may be embedded, a */
3255	/* license with the font vendor may be separately required to use the */
3256	/* font in this way. */
3257	/* */
3258	#define FT_FSTYPE_INSTALLABLE_EMBEDDING 0x0000
3259	#define FT_FSTYPE_RESTRICTED_LICENSE_EMBEDDING 0x0002
3260	#define FT_FSTYPE_PREVIEW_AND_PRINT_EMBEDDING 0x0004
3261	#define FT_FSTYPE_EDITABLE_EMBEDDING 0x0008
3262	#define FT_FSTYPE_NO_SUBSETTING 0x0100
3263	#define FT_FSTYPE_BITMAP_EMBEDDING_ONLY 0x0200
3264
3265
3266	/*************************************************************************/
3267	/* */
3268	/* <Function> */
3269	/* FT_Get_FSType_Flags */
3270	/* */
3271	/* <Description> */
3272	/* Return the fsType flags for a font. */
3273	/* */
3274	/* <Input> */
3275	/* face :: A handle to the source face object. */
3276	/* */
3277	/* <Return> */
3278	/* The fsType flags, @FT_FSTYPE_XXX. */
3279	/* */
3280	/* <Note> */
3281	/* Use this function rather than directly reading the `fs_type' field */
3282	/* in the @PS_FontInfoRec structure which is only guaranteed to */
3283	/* return the correct results for Type~1 fonts. */
3284	/* */
3285	FT_EXPORT( FT_UShort )
3286	FT_Get_FSType_Flags( FT_Face face );
3287
3288
3289	/*************************************************************************/
3290	/* */
3291	/* <Section> */
3292	/* glyph_variants */
3293	/* */
3294	/* <Title> */
3295	/* Glyph Variants */
3296	/* */
3297	/* <Abstract> */
3298	/* The FreeType~2 interface to Unicode Ideographic Variation */
3299	/* Sequences (IVS), using the SFNT cmap format~14. */
3300	/* */
3301	/* <Description> */
3302	/* Many CJK characters have variant forms. They are a sort of grey */
3303	/* area somewhere between being totally irrelevant and semantically */
3304	/* distinct; for this reason, the Unicode consortium decided to */
3305	/* introduce Ideographic Variation Sequences (IVS), consisting of a */
3306	/* Unicode base character and one of 240 variant selectors */
3307	/* (U+E0100-U+E01EF), instead of further extending the already huge */
3308	/* code range for CJK characters. */
3309	/* */
3310	/* An IVS is registered and unique; for further details please refer */
3311	/* to Unicode Technical Report #37, the Ideographic Variation */
3312	/* Database. To date (October 2007), the character with the most */
3313	/* variants is U+908A, having 8~such IVS. */
3314	/* */
3315	/* Adobe and MS decided to support IVS with a new cmap subtable */
3316	/* (format~14). It is an odd subtable because it is not a mapping of */
3317	/* input code points to glyphs, but contains lists of all variants */
3318	/* supported by the font. */
3319	/* */
3320	/* A variant may be either `default' or `non-default'. A default */
3321	/* variant is the one you will get for that code point if you look it */
3322	/* up in the standard Unicode cmap. A non-default variant is a */
3323	/* different glyph. */
3324	/* */
3325	/*************************************************************************/
3326
3327
3328	/*************************************************************************/
3329	/* */
3330	/* <Function> */
3331	/* FT_Face_GetCharVariantIndex */
3332	/* */
3333	/* <Description> */
3334	/* Return the glyph index of a given character code as modified by */
3335	/* the variation selector. */
3336	/* */
3337	/* <Input> */
3338	/* face :: */
3339	/* A handle to the source face object. */
3340	/* */
3341	/* charcode :: */
3342	/* The character code point in Unicode. */
3343	/* */
3344	/* variantSelector :: */
3345	/* The Unicode code point of the variation selector. */
3346	/* */
3347	/* <Return> */
3348	/* The glyph index. 0~means either `undefined character code', or */
3349	/* `undefined selector code', or `no variation selector cmap */
3350	/* subtable', or `current CharMap is not Unicode'. */
3351	/* */
3352	/* <Note> */
3353	/* If you use FreeType to manipulate the contents of font files */
3354	/* directly, be aware that the glyph index returned by this function */
3355	/* doesn't always correspond to the internal indices used within */
3356	/* the file. This is done to ensure that value~0 always corresponds */
3357	/* to the `missing glyph'. */
3358	/* */
3359	/* This function is only meaningful if */
3360	/* a) the font has a variation selector cmap sub table, */
3361	/* and */
3362	/* b) the current charmap has a Unicode encoding. */
3363	/* */
3364	/* <Since> */
3365	/* 2.3.6 */
3366	/* */
3367	FT_EXPORT( FT_UInt )
3368	FT_Face_GetCharVariantIndex( FT_Face face,
3369	FT_ULong charcode,
3370	FT_ULong variantSelector );
3371
3372
3373	/*************************************************************************/
3374	/* */
3375	/* <Function> */
3376	/* FT_Face_GetCharVariantIsDefault */
3377	/* */
3378	/* <Description> */
3379	/* Check whether this variant of this Unicode character is the one to */
3380	/* be found in the `cmap'. */
3381	/* */
3382	/* <Input> */
3383	/* face :: */
3384	/* A handle to the source face object. */
3385	/* */
3386	/* charcode :: */
3387	/* The character codepoint in Unicode. */
3388	/* */
3389	/* variantSelector :: */
3390	/* The Unicode codepoint of the variation selector. */
3391	/* */
3392	/* <Return> */
3393	/* 1~if found in the standard (Unicode) cmap, 0~if found in the */
3394	/* variation selector cmap, or -1 if it is not a variant. */
3395	/* */
3396	/* <Note> */
3397	/* This function is only meaningful if the font has a variation */
3398	/* selector cmap subtable. */
3399	/* */
3400	/* <Since> */
3401	/* 2.3.6 */
3402	/* */
3403	FT_EXPORT( FT_Int )
3404	FT_Face_GetCharVariantIsDefault( FT_Face face,
3405	FT_ULong charcode,
3406	FT_ULong variantSelector );
3407
3408
3409	/*************************************************************************/
3410	/* */
3411	/* <Function> */
3412	/* FT_Face_GetVariantSelectors */
3413	/* */
3414	/* <Description> */
3415	/* Return a zero-terminated list of Unicode variant selectors found */
3416	/* in the font. */
3417	/* */
3418	/* <Input> */
3419	/* face :: */
3420	/* A handle to the source face object. */
3421	/* */
3422	/* <Return> */
3423	/* A pointer to an array of selector code points, or NULL if there is */
3424	/* no valid variant selector cmap subtable. */
3425	/* */
3426	/* <Note> */
3427	/* The last item in the array is~0; the array is owned by the */
3428	/* @FT_Face object but can be overwritten or released on the next */
3429	/* call to a FreeType function. */
3430	/* */
3431	/* <Since> */
3432	/* 2.3.6 */
3433	/* */
3434	FT_EXPORT( FT_UInt32* )
3435	FT_Face_GetVariantSelectors( FT_Face face );
3436
3437
3438	/*************************************************************************/
3439	/* */
3440	/* <Function> */
3441	/* FT_Face_GetVariantsOfChar */
3442	/* */
3443	/* <Description> */
3444	/* Return a zero-terminated list of Unicode variant selectors found */
3445	/* for the specified character code. */
3446	/* */
3447	/* <Input> */
3448	/* face :: */
3449	/* A handle to the source face object. */
3450	/* */
3451	/* charcode :: */
3452	/* The character codepoint in Unicode. */
3453	/* */
3454	/* <Return> */
3455	/* A pointer to an array of variant selector code points which are */
3456	/* active for the given character, or NULL if the corresponding list */
3457	/* is empty. */
3458	/* */
3459	/* <Note> */
3460	/* The last item in the array is~0; the array is owned by the */
3461	/* @FT_Face object but can be overwritten or released on the next */
3462	/* call to a FreeType function. */
3463	/* */
3464	/* <Since> */
3465	/* 2.3.6 */
3466	/* */
3467	FT_EXPORT( FT_UInt32* )
3468	FT_Face_GetVariantsOfChar( FT_Face face,
3469	FT_ULong charcode );
3470
3471
3472	/*************************************************************************/
3473	/* */
3474	/* <Function> */
3475	/* FT_Face_GetCharsOfVariant */
3476	/* */
3477	/* <Description> */
3478	/* Return a zero-terminated list of Unicode character codes found for */
3479	/* the specified variant selector. */
3480	/* */
3481	/* <Input> */
3482	/* face :: */
3483	/* A handle to the source face object. */
3484	/* */
3485	/* variantSelector :: */
3486	/* The variant selector code point in Unicode. */
3487	/* */
3488	/* <Return> */
3489	/* A list of all the code points which are specified by this selector */
3490	/* (both default and non-default codes are returned) or NULL if there */
3491	/* is no valid cmap or the variant selector is invalid. */
3492	/* */
3493	/* <Note> */
3494	/* The last item in the array is~0; the array is owned by the */
3495	/* @FT_Face object but can be overwritten or released on the next */
3496	/* call to a FreeType function. */
3497	/* */
3498	/* <Since> */
3499	/* 2.3.6 */
3500	/* */
3501	FT_EXPORT( FT_UInt32* )
3502	FT_Face_GetCharsOfVariant( FT_Face face,
3503	FT_ULong variantSelector );
3504
3505
3506	/*************************************************************************/
3507	/* */
3508	/* <Section> */
3509	/* computations */
3510	/* */
3511	/* <Title> */
3512	/* Computations */
3513	/* */
3514	/* <Abstract> */
3515	/* Crunching fixed numbers and vectors. */
3516	/* */
3517	/* <Description> */
3518	/* This section contains various functions used to perform */
3519	/* computations on 16.16 fixed-float numbers or 2d vectors. */
3520	/* */
3521	/* <Order> */
3522	/* FT_MulDiv */
3523	/* FT_MulFix */
3524	/* FT_DivFix */
3525	/* FT_RoundFix */
3526	/* FT_CeilFix */
3527	/* FT_FloorFix */
3528	/* FT_Vector_Transform */
3529	/* FT_Matrix_Multiply */
3530	/* FT_Matrix_Invert */
3531	/* */
3532	/*************************************************************************/
3533
3534
3535	/*************************************************************************/
3536	/* */
3537	/* <Function> */
3538	/* FT_MulDiv */
3539	/* */
3540	/* <Description> */
3541	/* A very simple function used to perform the computation `(ab)/c' /
3542	/* with maximal accuracy (it uses a 64-bit intermediate integer */
3543	/* whenever necessary). */
3544	/* */
3545	/* This function isn't necessarily as fast as some processor specific */
3546	/* operations, but is at least completely portable. */
3547	/* */
3548	/* <Input> */
3549	/* a :: The first multiplier. */
3550	/* b :: The second multiplier. */
3551	/* c :: The divisor. */
3552	/* */
3553	/* <Return> */
3554	/* The result of `(ab)/c'. This function never traps when trying to /
3555	/* divide by zero; it simply returns `MaxInt' or `MinInt' depending */
3556	/* on the signs of `a' and `b'. */
3557	/* */
3558	FT_EXPORT( FT_Long )
3559	FT_MulDiv( FT_Long a,
3560	FT_Long b,
3561	FT_Long c );
3562
3563
3564	/* */
3565
3566	/* The following #if 0 ... #endif is for the documentation formatter, */
3567	/* hiding the internal `FT_MULFIX_INLINED' macro. */
3568
3569	#if 0
3570	/*************************************************************************/
3571	/* */
3572	/* <Function> */
3573	/* FT_MulFix */
3574	/* */
3575	/* <Description> */
3576	/* A very simple function used to perform the computation */
3577	/* `(ab)/0x10000' with maximal accuracy. Most of the time this is /
3578	/* used to multiply a given value by a 16.16 fixed float factor. */
3579	/* */
3580	/* <Input> */
3581	/* a :: The first multiplier. */
3582	/* b :: The second multiplier. Use a 16.16 factor here whenever */
3583	/* possible (see note below). */
3584	/* */
3585	/* <Return> */
3586	/* The result of `(ab)/0x10000'. /
3587	/* */
3588	/* <Note> */
3589	/* This function has been optimized for the case where the absolute */
3590	/* value of `a' is less than 2048, and `b' is a 16.16 scaling factor. */
3591	/* As this happens mainly when scaling from notional units to */
3592	/* fractional pixels in FreeType, it resulted in noticeable speed */
3593	/* improvements between versions 2.x and 1.x. */
3594	/* */
3595	/* As a conclusion, always try to place a 16.16 factor as the */
3596	/* _second_ argument of this function; this can make a great */
3597	/* difference. */
3598	/* */
3599	FT_EXPORT( FT_Long )
3600	FT_MulFix( FT_Long a,
3601	FT_Long b );
3602
3603	/* */
3604	#endif
3605
3606	#ifdef FT_MULFIX_INLINED
3607	#define FT_MulFix( a, b ) FT_MULFIX_INLINED( a, b )
3608	#else
3609	FT_EXPORT( FT_Long )
3610	FT_MulFix( FT_Long a,
3611	FT_Long b );
3612	#endif
3613
3614
3615	/*************************************************************************/
3616	/* */
3617	/* <Function> */
3618	/* FT_DivFix */
3619	/* */
3620	/* <Description> */
3621	/* A very simple function used to perform the computation */
3622	/* `(a0x10000)/b' with maximal accuracy. Most of the time, this is /
3623	/* used to divide a given value by a 16.16 fixed float factor. */
3624	/* */
3625	/* <Input> */
3626	/* a :: The first multiplier. */
3627	/* b :: The second multiplier. Use a 16.16 factor here whenever */
3628	/* possible (see note below). */
3629	/* */
3630	/* <Return> */
3631	/* The result of `(a0x10000)/b'. /
3632	/* */
3633	/* <Note> */
3634	/* The optimization for FT_DivFix() is simple: If (a~<<~16) fits in */
3635	/* 32~bits, then the division is computed directly. Otherwise, we */
3636	/* use a specialized version of @FT_MulDiv. */
3637	/* */
3638	FT_EXPORT( FT_Long )
3639	FT_DivFix( FT_Long a,
3640	FT_Long b );
3641
3642
3643	/*************************************************************************/
3644	/* */
3645	/* <Function> */
3646	/* FT_RoundFix */
3647	/* */
3648	/* <Description> */
3649	/* A very simple function used to round a 16.16 fixed number. */
3650	/* */
3651	/* <Input> */
3652	/* a :: The number to be rounded. */
3653	/* */
3654	/* <Return> */
3655	/* The result of `(a + 0x8000) & -0x10000'. */
3656	/* */
3657	FT_EXPORT( FT_Fixed )
3658	FT_RoundFix( FT_Fixed a );
3659
3660
3661	/*************************************************************************/
3662	/* */
3663	/* <Function> */
3664	/* FT_CeilFix */
3665	/* */
3666	/* <Description> */
3667	/* A very simple function used to compute the ceiling function of a */
3668	/* 16.16 fixed number. */
3669	/* */
3670	/* <Input> */
3671	/* a :: The number for which the ceiling function is to be computed. */
3672	/* */
3673	/* <Return> */
3674	/* The result of `(a + 0x10000 - 1) & -0x10000'. */
3675	/* */
3676	FT_EXPORT( FT_Fixed )
3677	FT_CeilFix( FT_Fixed a );
3678
3679
3680	/*************************************************************************/
3681	/* */
3682	/* <Function> */
3683	/* FT_FloorFix */
3684	/* */
3685	/* <Description> */
3686	/* A very simple function used to compute the floor function of a */
3687	/* 16.16 fixed number. */
3688	/* */
3689	/* <Input> */
3690	/* a :: The number for which the floor function is to be computed. */
3691	/* */
3692	/* <Return> */
3693	/* The result of `a & -0x10000'. */
3694	/* */
3695	FT_EXPORT( FT_Fixed )
3696	FT_FloorFix( FT_Fixed a );
3697
3698
3699	/*************************************************************************/
3700	/* */
3701	/* <Function> */
3702	/* FT_Vector_Transform */
3703	/* */
3704	/* <Description> */
3705	/* Transform a single vector through a 2x2 matrix. */
3706	/* */
3707	/* <InOut> */
3708	/* vector :: The target vector to transform. */
3709	/* */
3710	/* <Input> */
3711	/* matrix :: A pointer to the source 2x2 matrix. */
3712	/* */
3713	/* <Note> */
3714	/* The result is undefined if either `vector' or `matrix' is invalid. */
3715	/* */
3716	FT_EXPORT( void )
3717	FT_Vector_Transform( FT_Vector* vec,
3718	const FT_Matrix* matrix );
3719
3720
3721	/*************************************************************************/
3722	/* */
3723	/* <Section> */
3724	/* version */
3725	/* */
3726	/* <Title> */
3727	/* FreeType Version */
3728	/* */
3729	/* <Abstract> */
3730	/* Functions and macros related to FreeType versions. */
3731	/* */
3732	/* <Description> */
3733	/* Note that those functions and macros are of limited use because */
3734	/* even a new release of FreeType with only documentation changes */
3735	/* increases the version number. */
3736	/* */
3737	/*************************************************************************/
3738
3739
3740	/*************************************************************************
3741	*
3742	* @enum:
3743	* FREETYPE_XXX
3744	*
3745	* @description:
3746	* These three macros identify the FreeType source code version.
3747	* Use @FT_Library_Version to access them at runtime.
3748	*
3749	* @values:
3750	* FREETYPE_MAJOR :: The major version number.
3751	* FREETYPE_MINOR :: The minor version number.
3752	* FREETYPE_PATCH :: The patch level.
3753	*
3754	* @note:
3755	* The version number of FreeType if built as a dynamic link library
3756	* with the `libtool' package is _not_ controlled by these three
3757	* macros.
3758	*/
3759	#define FREETYPE_MAJOR 2
3760	#define FREETYPE_MINOR 3
3761	#define FREETYPE_PATCH 8
3762
3763
3764	/*************************************************************************/
3765	/* */
3766	/* <Function> */
3767	/* FT_Library_Version */
3768	/* */
3769	/* <Description> */
3770	/* Return the version of the FreeType library being used. This is */
3771	/* useful when dynamically linking to the library, since one cannot */
3772	/* use the macros @FREETYPE_MAJOR, @FREETYPE_MINOR, and */
3773	/* @FREETYPE_PATCH. */
3774	/* */
3775	/* <Input> */
3776	/* library :: A source library handle. */
3777	/* */
3778	/* <Output> */
3779	/* amajor :: The major version number. */
3780	/* */
3781	/* aminor :: The minor version number. */
3782	/* */
3783	/* apatch :: The patch version number. */
3784	/* */
3785	/* <Note> */
3786	/* The reason why this function takes a `library' argument is because */
3787	/* certain programs implement library initialization in a custom way */
3788	/* that doesn't use @FT_Init_FreeType. */
3789	/* */
3790	/* In such cases, the library version might not be available before */
3791	/* the library object has been created. */
3792	/* */
3793	FT_EXPORT( void )
3794	FT_Library_Version( FT_Library library,
3795	FT_Int *amajor,
3796	FT_Int *aminor,
3797	FT_Int *apatch );
3798
3799
3800	/*************************************************************************/
3801	/* */
3802	/* <Function> */
3803	/* FT_Face_CheckTrueTypePatents */
3804	/* */
3805	/* <Description> */
3806	/* Parse all bytecode instructions of a TrueType font file to check */
3807	/* whether any of the patented opcodes are used. This is only useful */
3808	/* if you want to be able to use the unpatented hinter with */
3809	/* fonts that do not use these opcodes. */
3810	/* */
3811	/* Note that this function parses all glyph instructions in the */
3812	/* font file, which may be slow. */
3813	/* */
3814	/* <Input> */
3815	/* face :: A face handle. */
3816	/* */
3817	/* <Return> */
3818	/* 1~if this is a TrueType font that uses one of the patented */
3819	/* opcodes, 0~otherwise. */
3820	/* */
3821	/* <Since> */
3822	/* 2.3.5 */
3823	/* */
3824	FT_EXPORT( FT_Bool )
3825	FT_Face_CheckTrueTypePatents( FT_Face face );
3826
3827
3828	/*************************************************************************/
3829	/* */
3830	/* <Function> */
3831	/* FT_Face_SetUnpatentedHinting */
3832	/* */
3833	/* <Description> */
3834	/* Enable or disable the unpatented hinter for a given face. */
3835	/* Only enable it if you have determined that the face doesn't */
3836	/* use any patented opcodes (see @FT_Face_CheckTrueTypePatents). */
3837	/* */
3838	/* <Input> */
3839	/* face :: A face handle. */
3840	/* */
3841	/* value :: New boolean setting. */
3842	/* */
3843	/* <Return> */
3844	/* The old setting value. This will always be false if this is not */
3845	/* an SFNT font, or if the unpatented hinter is not compiled in this */
3846	/* instance of the library. */
3847	/* */
3848	/* <Since> */
3849	/* 2.3.5 */
3850	/* */
3851	FT_EXPORT( FT_Bool )
3852	FT_Face_SetUnpatentedHinting( FT_Face face,
3853	FT_Bool value );
3854
3855	/* */
3856
3857
3858	FT_END_HEADER
3859
3860	#endif /* __FREETYPE_H__ */
3861
3862
3863	/* END */

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