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freetype.h
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1 /***************************************************************************/
2 /* */
3 /* freetype.h */
4 /* */
5 /* FreeType high-level API and common types (specification only). */
6 /* */
7 /* Copyright 1996-2012 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 #ifndef __FREETYPE_H__
29 #define __FREETYPE_H__
30 
31 
32 #include <ft2build.h>
33 #include FT_CONFIG_CONFIG_H
34 #include FT_ERRORS_H
35 #include FT_TYPES_H
36 
37 
38 FT_BEGIN_HEADER
39 
40 
41 
42  /*************************************************************************/
43  /* */
44  /* <Section> */
45  /* user_allocation */
46  /* */
47  /* <Title> */
48  /* User allocation */
49  /* */
50  /* <Abstract> */
51  /* How client applications should allocate FreeType data structures. */
52  /* */
53  /* <Description> */
54  /* FreeType assumes that structures allocated by the user and passed */
55  /* as arguments are zeroed out except for the actual data. In other */
56  /* words, it is recommended to use `calloc' (or variants of it) */
57  /* instead of `malloc' for allocation. */
58  /* */
59  /*************************************************************************/
60 
61 
62 
63  /*************************************************************************/
64  /*************************************************************************/
65  /* */
66  /* B A S I C T Y P E S */
67  /* */
68  /*************************************************************************/
69  /*************************************************************************/
70 
71 
72  /*************************************************************************/
73  /* */
74  /* <Section> */
75  /* base_interface */
76  /* */
77  /* <Title> */
78  /* Base Interface */
79  /* */
80  /* <Abstract> */
81  /* The FreeType~2 base font interface. */
82  /* */
83  /* <Description> */
84  /* This section describes the public high-level API of FreeType~2. */
85  /* */
86  /* <Order> */
87  /* FT_Library */
88  /* FT_Face */
89  /* FT_Size */
90  /* FT_GlyphSlot */
91  /* FT_CharMap */
92  /* FT_Encoding */
93  /* */
94  /* FT_FaceRec */
95  /* */
96  /* FT_FACE_FLAG_SCALABLE */
97  /* FT_FACE_FLAG_FIXED_SIZES */
98  /* FT_FACE_FLAG_FIXED_WIDTH */
99  /* FT_FACE_FLAG_HORIZONTAL */
100  /* FT_FACE_FLAG_VERTICAL */
101  /* FT_FACE_FLAG_SFNT */
102  /* FT_FACE_FLAG_KERNING */
103  /* FT_FACE_FLAG_MULTIPLE_MASTERS */
104  /* FT_FACE_FLAG_GLYPH_NAMES */
105  /* FT_FACE_FLAG_EXTERNAL_STREAM */
106  /* FT_FACE_FLAG_FAST_GLYPHS */
107  /* FT_FACE_FLAG_HINTER */
108  /* */
109  /* FT_STYLE_FLAG_BOLD */
110  /* FT_STYLE_FLAG_ITALIC */
111  /* */
112  /* FT_SizeRec */
113  /* FT_Size_Metrics */
114  /* */
115  /* FT_GlyphSlotRec */
116  /* FT_Glyph_Metrics */
117  /* FT_SubGlyph */
118  /* */
119  /* FT_Bitmap_Size */
120  /* */
121  /* FT_Init_FreeType */
122  /* FT_Done_FreeType */
123  /* */
124  /* FT_New_Face */
125  /* FT_Done_Face */
126  /* FT_New_Memory_Face */
127  /* FT_Open_Face */
128  /* FT_Open_Args */
129  /* FT_Parameter */
130  /* FT_Attach_File */
131  /* FT_Attach_Stream */
132  /* */
133  /* FT_Set_Char_Size */
134  /* FT_Set_Pixel_Sizes */
135  /* FT_Request_Size */
136  /* FT_Select_Size */
137  /* FT_Size_Request_Type */
138  /* FT_Size_Request */
139  /* FT_Set_Transform */
140  /* FT_Load_Glyph */
141  /* FT_Get_Char_Index */
142  /* FT_Get_Name_Index */
143  /* FT_Load_Char */
144  /* */
145  /* FT_OPEN_MEMORY */
146  /* FT_OPEN_STREAM */
147  /* FT_OPEN_PATHNAME */
148  /* FT_OPEN_DRIVER */
149  /* FT_OPEN_PARAMS */
150  /* */
151  /* FT_LOAD_DEFAULT */
152  /* FT_LOAD_RENDER */
153  /* FT_LOAD_MONOCHROME */
154  /* FT_LOAD_LINEAR_DESIGN */
155  /* FT_LOAD_NO_SCALE */
156  /* FT_LOAD_NO_HINTING */
157  /* FT_LOAD_NO_BITMAP */
158  /* FT_LOAD_CROP_BITMAP */
159  /* */
160  /* FT_LOAD_VERTICAL_LAYOUT */
161  /* FT_LOAD_IGNORE_TRANSFORM */
162  /* FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH */
163  /* FT_LOAD_FORCE_AUTOHINT */
164  /* FT_LOAD_NO_RECURSE */
165  /* FT_LOAD_PEDANTIC */
166  /* */
167  /* FT_LOAD_TARGET_NORMAL */
168  /* FT_LOAD_TARGET_LIGHT */
169  /* FT_LOAD_TARGET_MONO */
170  /* FT_LOAD_TARGET_LCD */
171  /* FT_LOAD_TARGET_LCD_V */
172  /* */
173  /* FT_Render_Glyph */
174  /* FT_Render_Mode */
175  /* FT_Get_Kerning */
176  /* FT_Kerning_Mode */
177  /* FT_Get_Track_Kerning */
178  /* FT_Get_Glyph_Name */
179  /* FT_Get_Postscript_Name */
180  /* */
181  /* FT_CharMapRec */
182  /* FT_Select_Charmap */
183  /* FT_Set_Charmap */
184  /* FT_Get_Charmap_Index */
185  /* */
186  /* FT_FSTYPE_INSTALLABLE_EMBEDDING */
187  /* FT_FSTYPE_RESTRICTED_LICENSE_EMBEDDING */
188  /* FT_FSTYPE_PREVIEW_AND_PRINT_EMBEDDING */
189  /* FT_FSTYPE_EDITABLE_EMBEDDING */
190  /* FT_FSTYPE_NO_SUBSETTING */
191  /* FT_FSTYPE_BITMAP_EMBEDDING_ONLY */
192  /* */
193  /* FT_Get_FSType_Flags */
194  /* */
195  /*************************************************************************/
196 
197 
198  /*************************************************************************/
199  /* */
200  /* <Struct> */
201  /* FT_Glyph_Metrics */
202  /* */
203  /* <Description> */
204  /* A structure used to model the metrics of a single glyph. The */
205  /* values are expressed in 26.6 fractional pixel format; if the flag */
206  /* @FT_LOAD_NO_SCALE has been used while loading the glyph, values */
207  /* are expressed in font units instead. */
208  /* */
209  /* <Fields> */
210  /* width :: */
211  /* The glyph's width. */
212  /* */
213  /* height :: */
214  /* The glyph's height. */
215  /* */
216  /* horiBearingX :: */
217  /* Left side bearing for horizontal layout. */
218  /* */
219  /* horiBearingY :: */
220  /* Top side bearing for horizontal layout. */
221  /* */
222  /* horiAdvance :: */
223  /* Advance width for horizontal layout. */
224  /* */
225  /* vertBearingX :: */
226  /* Left side bearing for vertical layout. */
227  /* */
228  /* vertBearingY :: */
229  /* Top side bearing for vertical layout. Larger positive values */
230  /* mean further below the vertical glyph origin. */
231  /* */
232  /* vertAdvance :: */
233  /* Advance height for vertical layout. Positive values mean the */
234  /* glyph has a positive advance downward. */
235  /* */
236  /* <Note> */
237  /* If not disabled with @FT_LOAD_NO_HINTING, the values represent */
238  /* dimensions of the hinted glyph (in case hinting is applicable). */
239  /* */
240  typedef struct FT_Glyph_Metrics_
241  {
242  FT_Pos width;
243  FT_Pos height;
244 
245  FT_Pos horiBearingX;
246  FT_Pos horiBearingY;
247  FT_Pos horiAdvance;
248 
249  FT_Pos vertBearingX;
250  FT_Pos vertBearingY;
251  FT_Pos vertAdvance;
252 
253  } FT_Glyph_Metrics;
254 
255 
256  /*************************************************************************/
257  /* */
258  /* <Struct> */
259  /* FT_Bitmap_Size */
260  /* */
261  /* <Description> */
262  /* This structure models the metrics of a bitmap strike (i.e., a set */
263  /* of glyphs for a given point size and resolution) in a bitmap font. */
264  /* It is used for the `available_sizes' field of @FT_Face. */
265  /* */
266  /* <Fields> */
267  /* height :: The vertical distance, in pixels, between two */
268  /* consecutive baselines. It is always positive. */
269  /* */
270  /* width :: The average width, in pixels, of all glyphs in the */
271  /* strike. */
272  /* */
273  /* size :: The nominal size of the strike in 26.6 fractional */
274  /* points. This field is not very useful. */
275  /* */
276  /* x_ppem :: The horizontal ppem (nominal width) in 26.6 fractional */
277  /* pixels. */
278  /* */
279  /* y_ppem :: The vertical ppem (nominal height) in 26.6 fractional */
280  /* pixels. */
281  /* */
282  /* <Note> */
283  /* Windows FNT: */
284  /* The nominal size given in a FNT font is not reliable. Thus when */
285  /* the driver finds it incorrect, it sets `size' to some calculated */
286  /* values and sets `x_ppem' and `y_ppem' to the pixel width and */
287  /* height given in the font, respectively. */
288  /* */
289  /* TrueType embedded bitmaps: */
290  /* `size', `width', and `height' values are not contained in the */
291  /* bitmap strike itself. They are computed from the global font */
292  /* parameters. */
293  /* */
294  typedef struct FT_Bitmap_Size_
295  {
296  FT_Short height;
297  FT_Short width;
298 
299  FT_Pos size;
300 
301  FT_Pos x_ppem;
302  FT_Pos y_ppem;
303 
304  } FT_Bitmap_Size;
305 
306 
307  /*************************************************************************/
308  /*************************************************************************/
309  /* */
310  /* O B J E C T C L A S S E S */
311  /* */
312  /*************************************************************************/
313  /*************************************************************************/
314 
315  /*************************************************************************/
316  /* */
317  /* <Type> */
318  /* FT_Library */
319  /* */
320  /* <Description> */
321  /* A handle to a FreeType library instance. Each `library' is */
322  /* completely independent from the others; it is the `root' of a set */
323  /* of objects like fonts, faces, sizes, etc. */
324  /* */
325  /* It also embeds a memory manager (see @FT_Memory), as well as a */
326  /* scan-line converter object (see @FT_Raster). */
327  /* */
328  /* For multi-threading applications each thread should have its own */
329  /* FT_Library object. */
330  /* */
331  /* <Note> */
332  /* Library objects are normally created by @FT_Init_FreeType, and */
333  /* destroyed with @FT_Done_FreeType. */
334  /* */
335  typedef struct FT_LibraryRec_ *FT_Library;
336 
337 
338  /*************************************************************************/
339  /* */
340  /* <Type> */
341  /* FT_Module */
342  /* */
343  /* <Description> */
344  /* A handle to a given FreeType module object. Each module can be a */
345  /* font driver, a renderer, or anything else that provides services */
346  /* to the formers. */
347  /* */
348  typedef struct FT_ModuleRec_* FT_Module;
349 
350 
351  /*************************************************************************/
352  /* */
353  /* <Type> */
354  /* FT_Driver */
355  /* */
356  /* <Description> */
357  /* A handle to a given FreeType font driver object. Each font driver */
358  /* is a special module capable of creating faces from font files. */
359  /* */
360  typedef struct FT_DriverRec_* FT_Driver;
361 
362 
363  /*************************************************************************/
364  /* */
365  /* <Type> */
366  /* FT_Renderer */
367  /* */
368  /* <Description> */
369  /* A handle to a given FreeType renderer. A renderer is a special */
370  /* module in charge of converting a glyph image to a bitmap, when */
371  /* necessary. Each renderer supports a given glyph image format, and */
372  /* one or more target surface depths. */
373  /* */
374  typedef struct FT_RendererRec_* FT_Renderer;
375 
376 
377  /*************************************************************************/
378  /* */
379  /* <Type> */
380  /* FT_Face */
381  /* */
382  /* <Description> */
383  /* A handle to a given typographic face object. A face object models */
384  /* a given typeface, in a given style. */
385  /* */
386  /* <Note> */
387  /* Each face object also owns a single @FT_GlyphSlot object, as well */
388  /* as one or more @FT_Size objects. */
389  /* */
390  /* Use @FT_New_Face or @FT_Open_Face to create a new face object from */
391  /* a given filepathname or a custom input stream. */
392  /* */
393  /* Use @FT_Done_Face to destroy it (along with its slot and sizes). */
394  /* */
395  /* <Also> */
396  /* See @FT_FaceRec for the publicly accessible fields of a given face */
397  /* object. */
398  /* */
399  typedef struct FT_FaceRec_* FT_Face;
400 
401 
402  /*************************************************************************/
403  /* */
404  /* <Type> */
405  /* FT_Size */
406  /* */
407  /* <Description> */
408  /* A handle to an object used to model a face scaled to a given */
409  /* character size. */
410  /* */
411  /* <Note> */
412  /* Each @FT_Face has an _active_ @FT_Size object that is used by */
413  /* functions like @FT_Load_Glyph to determine the scaling */
414  /* transformation which is used to load and hint glyphs and metrics. */
415  /* */
416  /* You can use @FT_Set_Char_Size, @FT_Set_Pixel_Sizes, */
417  /* @FT_Request_Size or even @FT_Select_Size to change the content */
418  /* (i.e., the scaling values) of the active @FT_Size. */
419  /* */
420  /* You can use @FT_New_Size to create additional size objects for a */
421  /* given @FT_Face, but they won't be used by other functions until */
422  /* you activate it through @FT_Activate_Size. Only one size can be */
423  /* activated at any given time per face. */
424  /* */
425  /* <Also> */
426  /* See @FT_SizeRec for the publicly accessible fields of a given size */
427  /* object. */
428  /* */
429  typedef struct FT_SizeRec_* FT_Size;
430 
431 
432  /*************************************************************************/
433  /* */
434  /* <Type> */
435  /* FT_GlyphSlot */
436  /* */
437  /* <Description> */
438  /* A handle to a given `glyph slot'. A slot is a container where it */
439  /* is possible to load any of the glyphs contained in its parent */
440  /* face. */
441  /* */
442  /* In other words, each time you call @FT_Load_Glyph or */
443  /* @FT_Load_Char, the slot's content is erased by the new glyph data, */
444  /* i.e., the glyph's metrics, its image (bitmap or outline), and */
445  /* other control information. */
446  /* */
447  /* <Also> */
448  /* See @FT_GlyphSlotRec for the publicly accessible glyph fields. */
449  /* */
450  typedef struct FT_GlyphSlotRec_* FT_GlyphSlot;
451 
452 
453  /*************************************************************************/
454  /* */
455  /* <Type> */
456  /* FT_CharMap */
457  /* */
458  /* <Description> */
459  /* A handle to a given character map. A charmap is used to translate */
460  /* character codes in a given encoding into glyph indexes for its */
461  /* parent's face. Some font formats may provide several charmaps per */
462  /* font. */
463  /* */
464  /* Each face object owns zero or more charmaps, but only one of them */
465  /* can be `active' and used by @FT_Get_Char_Index or @FT_Load_Char. */
466  /* */
467  /* The list of available charmaps in a face is available through the */
468  /* `face->num_charmaps' and `face->charmaps' fields of @FT_FaceRec. */
469  /* */
470  /* The currently active charmap is available as `face->charmap'. */
471  /* You should call @FT_Set_Charmap to change it. */
472  /* */
473  /* <Note> */
474  /* When a new face is created (either through @FT_New_Face or */
475  /* @FT_Open_Face), the library looks for a Unicode charmap within */
476  /* the list and automatically activates it. */
477  /* */
478  /* <Also> */
479  /* See @FT_CharMapRec for the publicly accessible fields of a given */
480  /* character map. */
481  /* */
482  typedef struct FT_CharMapRec_* FT_CharMap;
483 
484 
485  /*************************************************************************/
486  /* */
487  /* <Macro> */
488  /* FT_ENC_TAG */
489  /* */
490  /* <Description> */
491  /* This macro converts four-letter tags into an unsigned long. It is */
492  /* used to define `encoding' identifiers (see @FT_Encoding). */
493  /* */
494  /* <Note> */
495  /* Since many 16-bit compilers don't like 32-bit enumerations, you */
496  /* should redefine this macro in case of problems to something like */
497  /* this: */
498  /* */
499  /* { */
500  /* #define FT_ENC_TAG( value, a, b, c, d ) value */
501  /* } */
502  /* */
503  /* to get a simple enumeration without assigning special numbers. */
504  /* */
505 
506 #ifndef FT_ENC_TAG
507 #define FT_ENC_TAG( value, a, b, c, d ) \
508  value = ( ( (FT_UInt32)(a) << 24 ) | \
509  ( (FT_UInt32)(b) << 16 ) | \
510  ( (FT_UInt32)(c) << 8 ) | \
511  (FT_UInt32)(d) )
512 
513 #endif /* FT_ENC_TAG */
514 
515 
516  /*************************************************************************/
517  /* */
518  /* <Enum> */
519  /* FT_Encoding */
520  /* */
521  /* <Description> */
522  /* An enumeration used to specify character sets supported by */
523  /* charmaps. Used in the @FT_Select_Charmap API function. */
524  /* */
525  /* <Note> */
526  /* Despite the name, this enumeration lists specific character */
527  /* repertories (i.e., charsets), and not text encoding methods (e.g., */
528  /* UTF-8, UTF-16, etc.). */
529  /* */
530  /* Other encodings might be defined in the future. */
531  /* */
532  /* <Values> */
533  /* FT_ENCODING_NONE :: */
534  /* The encoding value~0 is reserved. */
535  /* */
536  /* FT_ENCODING_UNICODE :: */
537  /* Corresponds to the Unicode character set. This value covers */
538  /* all versions of the Unicode repertoire, including ASCII and */
539  /* Latin-1. Most fonts include a Unicode charmap, but not all */
540  /* of them. */
541  /* */
542  /* For example, if you want to access Unicode value U+1F028 (and */
543  /* the font contains it), use value 0x1F028 as the input value for */
544  /* @FT_Get_Char_Index. */
545  /* */
546  /* FT_ENCODING_MS_SYMBOL :: */
547  /* Corresponds to the Microsoft Symbol encoding, used to encode */
548  /* mathematical symbols in the 32..255 character code range. For */
549  /* more information, see `http://www.ceviz.net/symbol.htm'. */
550  /* */
551  /* FT_ENCODING_SJIS :: */
552  /* Corresponds to Japanese SJIS encoding. More info at */
553  /* at `http://langsupport.japanreference.com/encoding.shtml'. */
554  /* See note on multi-byte encodings below. */
555  /* */
556  /* FT_ENCODING_GB2312 :: */
557  /* Corresponds to an encoding system for Simplified Chinese as used */
558  /* used in mainland China. */
559  /* */
560  /* FT_ENCODING_BIG5 :: */
561  /* Corresponds to an encoding system for Traditional Chinese as */
562  /* used in Taiwan and Hong Kong. */
563  /* */
564  /* FT_ENCODING_WANSUNG :: */
565  /* Corresponds to the Korean encoding system known as Wansung. */
566  /* For more information see */
567  /* `http://www.microsoft.com/typography/unicode/949.txt'. */
568  /* */
569  /* FT_ENCODING_JOHAB :: */
570  /* The Korean standard character set (KS~C 5601-1992), which */
571  /* corresponds to MS Windows code page 1361. This character set */
572  /* includes all possible Hangeul character combinations. */
573  /* */
574  /* FT_ENCODING_ADOBE_LATIN_1 :: */
575  /* Corresponds to a Latin-1 encoding as defined in a Type~1 */
576  /* PostScript font. It is limited to 256 character codes. */
577  /* */
578  /* FT_ENCODING_ADOBE_STANDARD :: */
579  /* Corresponds to the Adobe Standard encoding, as found in Type~1, */
580  /* CFF, and OpenType/CFF fonts. It is limited to 256 character */
581  /* codes. */
582  /* */
583  /* FT_ENCODING_ADOBE_EXPERT :: */
584  /* Corresponds to the Adobe Expert encoding, as found in Type~1, */
585  /* CFF, and OpenType/CFF fonts. It is limited to 256 character */
586  /* codes. */
587  /* */
588  /* FT_ENCODING_ADOBE_CUSTOM :: */
589  /* Corresponds to a custom encoding, as found in Type~1, CFF, and */
590  /* OpenType/CFF fonts. It is limited to 256 character codes. */
591  /* */
592  /* FT_ENCODING_APPLE_ROMAN :: */
593  /* Corresponds to the 8-bit Apple roman encoding. Many TrueType */
594  /* and OpenType fonts contain a charmap for this encoding, since */
595  /* older versions of Mac OS are able to use it. */
596  /* */
597  /* FT_ENCODING_OLD_LATIN_2 :: */
598  /* This value is deprecated and was never used nor reported by */
599  /* FreeType. Don't use or test for it. */
600  /* */
601  /* FT_ENCODING_MS_SJIS :: */
602  /* Same as FT_ENCODING_SJIS. Deprecated. */
603  /* */
604  /* FT_ENCODING_MS_GB2312 :: */
605  /* Same as FT_ENCODING_GB2312. Deprecated. */
606  /* */
607  /* FT_ENCODING_MS_BIG5 :: */
608  /* Same as FT_ENCODING_BIG5. Deprecated. */
609  /* */
610  /* FT_ENCODING_MS_WANSUNG :: */
611  /* Same as FT_ENCODING_WANSUNG. Deprecated. */
612  /* */
613  /* FT_ENCODING_MS_JOHAB :: */
614  /* Same as FT_ENCODING_JOHAB. Deprecated. */
615  /* */
616  /* <Note> */
617  /* By default, FreeType automatically synthesizes a Unicode charmap */
618  /* for PostScript fonts, using their glyph names dictionaries. */
619  /* However, it also reports the encodings defined explicitly in the */
620  /* font file, for the cases when they are needed, with the Adobe */
621  /* values as well. */
622  /* */
623  /* FT_ENCODING_NONE is set by the BDF and PCF drivers if the charmap */
624  /* is neither Unicode nor ISO-8859-1 (otherwise it is set to */
625  /* FT_ENCODING_UNICODE). Use @FT_Get_BDF_Charset_ID to find out */
626  /* which encoding is really present. If, for example, the */
627  /* `cs_registry' field is `KOI8' and the `cs_encoding' field is `R', */
628  /* the font is encoded in KOI8-R. */
629  /* */
630  /* FT_ENCODING_NONE is always set (with a single exception) by the */
631  /* winfonts driver. Use @FT_Get_WinFNT_Header and examine the */
632  /* `charset' field of the @FT_WinFNT_HeaderRec structure to find out */
633  /* which encoding is really present. For example, */
634  /* @FT_WinFNT_ID_CP1251 (204) means Windows code page 1251 (for */
635  /* Russian). */
636  /* */
637  /* FT_ENCODING_NONE is set if `platform_id' is @TT_PLATFORM_MACINTOSH */
638  /* and `encoding_id' is not @TT_MAC_ID_ROMAN (otherwise it is set to */
639  /* FT_ENCODING_APPLE_ROMAN). */
640  /* */
641  /* If `platform_id' is @TT_PLATFORM_MACINTOSH, use the function */
642  /* @FT_Get_CMap_Language_ID to query the Mac language ID which may */
643  /* be needed to be able to distinguish Apple encoding variants. See */
644  /* */
645  /* http://www.unicode.org/Public/MAPPINGS/VENDORS/APPLE/README.TXT */
646  /* */
647  /* to get an idea how to do that. Basically, if the language ID */
648  /* is~0, don't use it, otherwise subtract 1 from the language ID. */
649  /* Then examine `encoding_id'. If, for example, `encoding_id' is */
650  /* @TT_MAC_ID_ROMAN and the language ID (minus~1) is */
651  /* `TT_MAC_LANGID_GREEK', it is the Greek encoding, not Roman. */
652  /* @TT_MAC_ID_ARABIC with `TT_MAC_LANGID_FARSI' means the Farsi */
653  /* variant the Arabic encoding. */
654  /* */
655  typedef enum FT_Encoding_
656  {
657  FT_ENC_TAG( FT_ENCODING_NONE, 0, 0, 0, 0 ),
658 
659  FT_ENC_TAG( FT_ENCODING_MS_SYMBOL, 's', 'y', 'm', 'b' ),
660  FT_ENC_TAG( FT_ENCODING_UNICODE, 'u', 'n', 'i', 'c' ),
661 
662  FT_ENC_TAG( FT_ENCODING_SJIS, 's', 'j', 'i', 's' ),
663  FT_ENC_TAG( FT_ENCODING_GB2312, 'g', 'b', ' ', ' ' ),
664  FT_ENC_TAG( FT_ENCODING_BIG5, 'b', 'i', 'g', '5' ),
665  FT_ENC_TAG( FT_ENCODING_WANSUNG, 'w', 'a', 'n', 's' ),
666  FT_ENC_TAG( FT_ENCODING_JOHAB, 'j', 'o', 'h', 'a' ),
667 
668  /* for backwards compatibility */
669  FT_ENCODING_MS_SJIS = FT_ENCODING_SJIS,
670  FT_ENCODING_MS_GB2312 = FT_ENCODING_GB2312,
671  FT_ENCODING_MS_BIG5 = FT_ENCODING_BIG5,
672  FT_ENCODING_MS_WANSUNG = FT_ENCODING_WANSUNG,
673  FT_ENCODING_MS_JOHAB = FT_ENCODING_JOHAB,
674 
675  FT_ENC_TAG( FT_ENCODING_ADOBE_STANDARD, 'A', 'D', 'O', 'B' ),
676  FT_ENC_TAG( FT_ENCODING_ADOBE_EXPERT, 'A', 'D', 'B', 'E' ),
677  FT_ENC_TAG( FT_ENCODING_ADOBE_CUSTOM, 'A', 'D', 'B', 'C' ),
678  FT_ENC_TAG( FT_ENCODING_ADOBE_LATIN_1, 'l', 'a', 't', '1' ),
679 
680  FT_ENC_TAG( FT_ENCODING_OLD_LATIN_2, 'l', 'a', 't', '2' ),
681 
682  FT_ENC_TAG( FT_ENCODING_APPLE_ROMAN, 'a', 'r', 'm', 'n' )
683 
684  } FT_Encoding;
685 
686 
687  /*************************************************************************/
688  /* */
689  /* <Enum> */
690  /* ft_encoding_xxx */
691  /* */
692  /* <Description> */
693  /* These constants are deprecated; use the corresponding @FT_Encoding */
694  /* values instead. */
695  /* */
696 #define ft_encoding_none FT_ENCODING_NONE
697 #define ft_encoding_unicode FT_ENCODING_UNICODE
698 #define ft_encoding_symbol FT_ENCODING_MS_SYMBOL
699 #define ft_encoding_latin_1 FT_ENCODING_ADOBE_LATIN_1
700 #define ft_encoding_latin_2 FT_ENCODING_OLD_LATIN_2
701 #define ft_encoding_sjis FT_ENCODING_SJIS
702 #define ft_encoding_gb2312 FT_ENCODING_GB2312
703 #define ft_encoding_big5 FT_ENCODING_BIG5
704 #define ft_encoding_wansung FT_ENCODING_WANSUNG
705 #define ft_encoding_johab FT_ENCODING_JOHAB
706 
707 #define ft_encoding_adobe_standard FT_ENCODING_ADOBE_STANDARD
708 #define ft_encoding_adobe_expert FT_ENCODING_ADOBE_EXPERT
709 #define ft_encoding_adobe_custom FT_ENCODING_ADOBE_CUSTOM
710 #define ft_encoding_apple_roman FT_ENCODING_APPLE_ROMAN
711 
712 
713  /*************************************************************************/
714  /* */
715  /* <Struct> */
716  /* FT_CharMapRec */
717  /* */
718  /* <Description> */
719  /* The base charmap structure. */
720  /* */
721  /* <Fields> */
722  /* face :: A handle to the parent face object. */
723  /* */
724  /* encoding :: An @FT_Encoding tag identifying the charmap. Use */
725  /* this with @FT_Select_Charmap. */
726  /* */
727  /* platform_id :: An ID number describing the platform for the */
728  /* following encoding ID. This comes directly from */
729  /* the TrueType specification and should be emulated */
730  /* for other formats. */
731  /* */
732  /* encoding_id :: A platform specific encoding number. This also */
733  /* comes from the TrueType specification and should be */
734  /* emulated similarly. */
735  /* */
736  typedef struct FT_CharMapRec_
737  {
738  FT_Face face;
739  FT_Encoding encoding;
740  FT_UShort platform_id;
741  FT_UShort encoding_id;
742 
743  } FT_CharMapRec;
744 
745 
746  /*************************************************************************/
747  /*************************************************************************/
748  /* */
749  /* B A S E O B J E C T C L A S S E S */
750  /* */
751  /*************************************************************************/
752  /*************************************************************************/
753 
754 
755  /*************************************************************************/
756  /* */
757  /* <Type> */
758  /* FT_Face_Internal */
759  /* */
760  /* <Description> */
761  /* An opaque handle to an `FT_Face_InternalRec' structure, used to */
762  /* model private data of a given @FT_Face object. */
763  /* */
764  /* This structure might change between releases of FreeType~2 and is */
765  /* not generally available to client applications. */
766  /* */
767  typedef struct FT_Face_InternalRec_* FT_Face_Internal;
768 
769 
770  /*************************************************************************/
771  /* */
772  /* <Struct> */
773  /* FT_FaceRec */
774  /* */
775  /* <Description> */
776  /* FreeType root face class structure. A face object models a */
777  /* typeface in a font file. */
778  /* */
779  /* <Fields> */
780  /* num_faces :: The number of faces in the font file. Some */
781  /* font formats can have multiple faces in */
782  /* a font file. */
783  /* */
784  /* face_index :: The index of the face in the font file. It */
785  /* is set to~0 if there is only one face in */
786  /* the font file. */
787  /* */
788  /* face_flags :: A set of bit flags that give important */
789  /* information about the face; see */
790  /* @FT_FACE_FLAG_XXX for the details. */
791  /* */
792  /* style_flags :: A set of bit flags indicating the style of */
793  /* the face; see @FT_STYLE_FLAG_XXX for the */
794  /* details. */
795  /* */
796  /* num_glyphs :: The number of glyphs in the face. If the */
797  /* face is scalable and has sbits (see */
798  /* `num_fixed_sizes'), it is set to the number */
799  /* of outline glyphs. */
800  /* */
801  /* For CID-keyed fonts, this value gives the */
802  /* highest CID used in the font. */
803  /* */
804  /* family_name :: The face's family name. This is an ASCII */
805  /* string, usually in English, which describes */
806  /* the typeface's family (like `Times New */
807  /* Roman', `Bodoni', `Garamond', etc). This */
808  /* is a least common denominator used to list */
809  /* fonts. Some formats (TrueType & OpenType) */
810  /* provide localized and Unicode versions of */
811  /* this string. Applications should use the */
812  /* format specific interface to access them. */
813  /* Can be NULL (e.g., in fonts embedded in a */
814  /* PDF file). */
815  /* */
816  /* style_name :: The face's style name. This is an ASCII */
817  /* string, usually in English, which describes */
818  /* the typeface's style (like `Italic', */
819  /* `Bold', `Condensed', etc). Not all font */
820  /* formats provide a style name, so this field */
821  /* is optional, and can be set to NULL. As */
822  /* for `family_name', some formats provide */
823  /* localized and Unicode versions of this */
824  /* string. Applications should use the format */
825  /* specific interface to access them. */
826  /* */
827  /* num_fixed_sizes :: The number of bitmap strikes in the face. */
828  /* Even if the face is scalable, there might */
829  /* still be bitmap strikes, which are called */
830  /* `sbits' in that case. */
831  /* */
832  /* available_sizes :: An array of @FT_Bitmap_Size for all bitmap */
833  /* strikes in the face. It is set to NULL if */
834  /* there is no bitmap strike. */
835  /* */
836  /* num_charmaps :: The number of charmaps in the face. */
837  /* */
838  /* charmaps :: An array of the charmaps of the face. */
839  /* */
840  /* generic :: A field reserved for client uses. See the */
841  /* @FT_Generic type description. */
842  /* */
843  /* bbox :: The font bounding box. Coordinates are */
844  /* expressed in font units (see */
845  /* `units_per_EM'). The box is large enough */
846  /* to contain any glyph from the font. Thus, */
847  /* `bbox.yMax' can be seen as the `maximal */
848  /* ascender', and `bbox.yMin' as the `minimal */
849  /* descender'. Only relevant for scalable */
850  /* formats. */
851  /* */
852  /* Note that the bounding box might be off by */
853  /* (at least) one pixel for hinted fonts. See */
854  /* @FT_Size_Metrics for further discussion. */
855  /* */
856  /* units_per_EM :: The number of font units per EM square for */
857  /* this face. This is typically 2048 for */
858  /* TrueType fonts, and 1000 for Type~1 fonts. */
859  /* Only relevant for scalable formats. */
860  /* */
861  /* ascender :: The typographic ascender of the face, */
862  /* expressed in font units. For font formats */
863  /* not having this information, it is set to */
864  /* `bbox.yMax'. Only relevant for scalable */
865  /* formats. */
866  /* */
867  /* descender :: The typographic descender of the face, */
868  /* expressed in font units. For font formats */
869  /* not having this information, it is set to */
870  /* `bbox.yMin'. Note that this field is */
871  /* usually negative. Only relevant for */
872  /* scalable formats. */
873  /* */
874  /* height :: The height is the vertical distance */
875  /* between two consecutive baselines, */
876  /* expressed in font units. It is always */
877  /* positive. Only relevant for scalable */
878  /* formats. */
879  /* */
880  /* max_advance_width :: The maximal advance width, in font units, */
881  /* for all glyphs in this face. This can be */
882  /* used to make word wrapping computations */
883  /* faster. Only relevant for scalable */
884  /* formats. */
885  /* */
886  /* max_advance_height :: The maximal advance height, in font units, */
887  /* for all glyphs in this face. This is only */
888  /* relevant for vertical layouts, and is set */
889  /* to `height' for fonts that do not provide */
890  /* vertical metrics. Only relevant for */
891  /* scalable formats. */
892  /* */
893  /* underline_position :: The position, in font units, of the */
894  /* underline line for this face. It is the */
895  /* center of the underlining stem. Only */
896  /* relevant for scalable formats. */
897  /* */
898  /* underline_thickness :: The thickness, in font units, of the */
899  /* underline for this face. Only relevant for */
900  /* scalable formats. */
901  /* */
902  /* glyph :: The face's associated glyph slot(s). */
903  /* */
904  /* size :: The current active size for this face. */
905  /* */
906  /* charmap :: The current active charmap for this face. */
907  /* */
908  /* <Note> */
909  /* Fields may be changed after a call to @FT_Attach_File or */
910  /* @FT_Attach_Stream. */
911  /* */
912  typedef struct FT_FaceRec_
913  {
914  FT_Long num_faces;
915  FT_Long face_index;
916 
917  FT_Long face_flags;
918  FT_Long style_flags;
919 
920  FT_Long num_glyphs;
921 
922  FT_String* family_name;
923  FT_String* style_name;
924 
925  FT_Int num_fixed_sizes;
926  FT_Bitmap_Size* available_sizes;
927 
928  FT_Int num_charmaps;
929  FT_CharMap* charmaps;
930 
931  FT_Generic generic;
932 
933  /*# The following member variables (down to `underline_thickness') */
934  /*# are only relevant to scalable outlines; cf. @FT_Bitmap_Size */
935  /*# for bitmap fonts. */
936  FT_BBox bbox;
937 
938  FT_UShort units_per_EM;
939  FT_Short ascender;
940  FT_Short descender;
941  FT_Short height;
942 
943  FT_Short max_advance_width;
944  FT_Short max_advance_height;
945 
946  FT_Short underline_position;
947  FT_Short underline_thickness;
948 
949  FT_GlyphSlot glyph;
950  FT_Size size;
951  FT_CharMap charmap;
952 
953  /*@private begin */
954 
955  FT_Driver driver;
956  FT_Memory memory;
957  FT_Stream stream;
958 
959  FT_ListRec sizes_list;
960 
961  FT_Generic autohint; /* face-specific auto-hinter data */
962  void* extensions; /* unused */
963 
964  FT_Face_Internal internal;
965 
966  /*@private end */
967 
968  } FT_FaceRec;
969 
970 
971  /*************************************************************************/
972  /* */
973  /* <Enum> */
974  /* FT_FACE_FLAG_XXX */
975  /* */
976  /* <Description> */
977  /* A list of bit flags used in the `face_flags' field of the */
978  /* @FT_FaceRec structure. They inform client applications of */
979  /* properties of the corresponding face. */
980  /* */
981  /* <Values> */
982  /* FT_FACE_FLAG_SCALABLE :: */
983  /* Indicates that the face contains outline glyphs. This doesn't */
984  /* prevent bitmap strikes, i.e., a face can have both this and */
985  /* and @FT_FACE_FLAG_FIXED_SIZES set. */
986  /* */
987  /* FT_FACE_FLAG_FIXED_SIZES :: */
988  /* Indicates that the face contains bitmap strikes. See also the */
989  /* `num_fixed_sizes' and `available_sizes' fields of @FT_FaceRec. */
990  /* */
991  /* FT_FACE_FLAG_FIXED_WIDTH :: */
992  /* Indicates that the face contains fixed-width characters (like */
993  /* Courier, Lucido, MonoType, etc.). */
994  /* */
995  /* FT_FACE_FLAG_SFNT :: */
996  /* Indicates that the face uses the `sfnt' storage scheme. For */
997  /* now, this means TrueType and OpenType. */
998  /* */
999  /* FT_FACE_FLAG_HORIZONTAL :: */
1000  /* Indicates that the face contains horizontal glyph metrics. This */
1001  /* should be set for all common formats. */
1002  /* */
1003  /* FT_FACE_FLAG_VERTICAL :: */
1004  /* Indicates that the face contains vertical glyph metrics. This */
1005  /* is only available in some formats, not all of them. */
1006  /* */
1007  /* FT_FACE_FLAG_KERNING :: */
1008  /* Indicates that the face contains kerning information. If set, */
1009  /* the kerning distance can be retrieved through the function */
1010  /* @FT_Get_Kerning. Otherwise the function always return the */
1011  /* vector (0,0). Note that FreeType doesn't handle kerning data */
1012  /* from the `GPOS' table (as present in some OpenType fonts). */
1013  /* */
1014  /* FT_FACE_FLAG_FAST_GLYPHS :: */
1015  /* THIS FLAG IS DEPRECATED. DO NOT USE OR TEST IT. */
1016  /* */
1017  /* FT_FACE_FLAG_MULTIPLE_MASTERS :: */
1018  /* Indicates that the font contains multiple masters and is capable */
1019  /* of interpolating between them. See the multiple-masters */
1020  /* specific API for details. */
1021  /* */
1022  /* FT_FACE_FLAG_GLYPH_NAMES :: */
1023  /* Indicates that the font contains glyph names that can be */
1024  /* retrieved through @FT_Get_Glyph_Name. Note that some TrueType */
1025  /* fonts contain broken glyph name tables. Use the function */
1026  /* @FT_Has_PS_Glyph_Names when needed. */
1027  /* */
1028  /* FT_FACE_FLAG_EXTERNAL_STREAM :: */
1029  /* Used internally by FreeType to indicate that a face's stream was */
1030  /* provided by the client application and should not be destroyed */
1031  /* when @FT_Done_Face is called. Don't read or test this flag. */
1032  /* */
1033  /* FT_FACE_FLAG_HINTER :: */
1034  /* Set if the font driver has a hinting machine of its own. For */
1035  /* example, with TrueType fonts, it makes sense to use data from */
1036  /* the SFNT `gasp' table only if the native TrueType hinting engine */
1037  /* (with the bytecode interpreter) is available and active. */
1038  /* */
1039  /* FT_FACE_FLAG_CID_KEYED :: */
1040  /* Set if the font is CID-keyed. In that case, the font is not */
1041  /* accessed by glyph indices but by CID values. For subsetted */
1042  /* CID-keyed fonts this has the consequence that not all index */
1043  /* values are a valid argument to FT_Load_Glyph. Only the CID */
1044  /* values for which corresponding glyphs in the subsetted font */
1045  /* exist make FT_Load_Glyph return successfully; in all other cases */
1046  /* you get an `FT_Err_Invalid_Argument' error. */
1047  /* */
1048  /* Note that CID-keyed fonts which are in an SFNT wrapper don't */
1049  /* have this flag set since the glyphs are accessed in the normal */
1050  /* way (using contiguous indices); the `CID-ness' isn't visible to */
1051  /* the application. */
1052  /* */
1053  /* FT_FACE_FLAG_TRICKY :: */
1054  /* Set if the font is `tricky', this is, it always needs the */
1055  /* font format's native hinting engine to get a reasonable result. */
1056  /* A typical example is the Chinese font `mingli.ttf' which uses */
1057  /* TrueType bytecode instructions to move and scale all of its */
1058  /* subglyphs. */
1059  /* */
1060  /* It is not possible to autohint such fonts using */
1061  /* @FT_LOAD_FORCE_AUTOHINT; it will also ignore */
1062  /* @FT_LOAD_NO_HINTING. You have to set both @FT_LOAD_NO_HINTING */
1063  /* and @FT_LOAD_NO_AUTOHINT to really disable hinting; however, you */
1064  /* probably never want this except for demonstration purposes. */
1065  /* */
1066  /* Currently, there are about a dozen TrueType fonts in the list of */
1067  /* tricky fonts; they are hard-coded in file `ttobjs.c'. */
1068  /* */
1069 #define FT_FACE_FLAG_SCALABLE ( 1L << 0 )
1070 #define FT_FACE_FLAG_FIXED_SIZES ( 1L << 1 )
1071 #define FT_FACE_FLAG_FIXED_WIDTH ( 1L << 2 )
1072 #define FT_FACE_FLAG_SFNT ( 1L << 3 )
1073 #define FT_FACE_FLAG_HORIZONTAL ( 1L << 4 )
1074 #define FT_FACE_FLAG_VERTICAL ( 1L << 5 )
1075 #define FT_FACE_FLAG_KERNING ( 1L << 6 )
1076 #define FT_FACE_FLAG_FAST_GLYPHS ( 1L << 7 )
1077 #define FT_FACE_FLAG_MULTIPLE_MASTERS ( 1L << 8 )
1078 #define FT_FACE_FLAG_GLYPH_NAMES ( 1L << 9 )
1079 #define FT_FACE_FLAG_EXTERNAL_STREAM ( 1L << 10 )
1080 #define FT_FACE_FLAG_HINTER ( 1L << 11 )
1081 #define FT_FACE_FLAG_CID_KEYED ( 1L << 12 )
1082 #define FT_FACE_FLAG_TRICKY ( 1L << 13 )
1083 
1084 
1085  /*************************************************************************
1086  *
1087  * @macro:
1088  * FT_HAS_HORIZONTAL( face )
1089  *
1090  * @description:
1091  * A macro that returns true whenever a face object contains
1092  * horizontal metrics (this is true for all font formats though).
1093  *
1094  * @also:
1095  * @FT_HAS_VERTICAL can be used to check for vertical metrics.
1096  *
1097  */
1098 #define FT_HAS_HORIZONTAL( face ) \
1099  ( face->face_flags & FT_FACE_FLAG_HORIZONTAL )
1100 
1101 
1102  /*************************************************************************
1103  *
1104  * @macro:
1105  * FT_HAS_VERTICAL( face )
1106  *
1107  * @description:
1108  * A macro that returns true whenever a face object contains vertical
1109  * metrics.
1110  *
1111  */
1112 #define FT_HAS_VERTICAL( face ) \
1113  ( face->face_flags & FT_FACE_FLAG_VERTICAL )
1114 
1115 
1116  /*************************************************************************
1117  *
1118  * @macro:
1119  * FT_HAS_KERNING( face )
1120  *
1121  * @description:
1122  * A macro that returns true whenever a face object contains kerning
1123  * data that can be accessed with @FT_Get_Kerning.
1124  *
1125  */
1126 #define FT_HAS_KERNING( face ) \
1127  ( face->face_flags & FT_FACE_FLAG_KERNING )
1128 
1129 
1130  /*************************************************************************
1131  *
1132  * @macro:
1133  * FT_IS_SCALABLE( face )
1134  *
1135  * @description:
1136  * A macro that returns true whenever a face object contains a scalable
1137  * font face (true for TrueType, Type~1, Type~42, CID, OpenType/CFF,
1138  * and PFR font formats.
1139  *
1140  */
1141 #define FT_IS_SCALABLE( face ) \
1142  ( face->face_flags & FT_FACE_FLAG_SCALABLE )
1143 
1144 
1145  /*************************************************************************
1146  *
1147  * @macro:
1148  * FT_IS_SFNT( face )
1149  *
1150  * @description:
1151  * A macro that returns true whenever a face object contains a font
1152  * whose format is based on the SFNT storage scheme. This usually
1153  * means: TrueType fonts, OpenType fonts, as well as SFNT-based embedded
1154  * bitmap fonts.
1155  *
1156  * If this macro is true, all functions defined in @FT_SFNT_NAMES_H and
1157  * @FT_TRUETYPE_TABLES_H are available.
1158  *
1159  */
1160 #define FT_IS_SFNT( face ) \
1161  ( face->face_flags & FT_FACE_FLAG_SFNT )
1162 
1163 
1164  /*************************************************************************
1165  *
1166  * @macro:
1167  * FT_IS_FIXED_WIDTH( face )
1168  *
1169  * @description:
1170  * A macro that returns true whenever a face object contains a font face
1171  * that contains fixed-width (or `monospace', `fixed-pitch', etc.)
1172  * glyphs.
1173  *
1174  */
1175 #define FT_IS_FIXED_WIDTH( face ) \
1176  ( face->face_flags & FT_FACE_FLAG_FIXED_WIDTH )
1177 
1178 
1179  /*************************************************************************
1180  *
1181  * @macro:
1182  * FT_HAS_FIXED_SIZES( face )
1183  *
1184  * @description:
1185  * A macro that returns true whenever a face object contains some
1186  * embedded bitmaps. See the `available_sizes' field of the
1187  * @FT_FaceRec structure.
1188  *
1189  */
1190 #define FT_HAS_FIXED_SIZES( face ) \
1191  ( face->face_flags & FT_FACE_FLAG_FIXED_SIZES )
1192 
1193 
1194  /*************************************************************************
1195  *
1196  * @macro:
1197  * FT_HAS_FAST_GLYPHS( face )
1198  *
1199  * @description:
1200  * Deprecated.
1201  *
1202  */
1203 #define FT_HAS_FAST_GLYPHS( face ) 0
1204 
1205 
1206  /*************************************************************************
1207  *
1208  * @macro:
1209  * FT_HAS_GLYPH_NAMES( face )
1210  *
1211  * @description:
1212  * A macro that returns true whenever a face object contains some glyph
1213  * names that can be accessed through @FT_Get_Glyph_Name.
1214  *
1215  */
1216 #define FT_HAS_GLYPH_NAMES( face ) \
1217  ( face->face_flags & FT_FACE_FLAG_GLYPH_NAMES )
1218 
1219 
1220  /*************************************************************************
1221  *
1222  * @macro:
1223  * FT_HAS_MULTIPLE_MASTERS( face )
1224  *
1225  * @description:
1226  * A macro that returns true whenever a face object contains some
1227  * multiple masters. The functions provided by @FT_MULTIPLE_MASTERS_H
1228  * are then available to choose the exact design you want.
1229  *
1230  */
1231 #define FT_HAS_MULTIPLE_MASTERS( face ) \
1232  ( face->face_flags & FT_FACE_FLAG_MULTIPLE_MASTERS )
1233 
1234 
1235  /*************************************************************************
1236  *
1237  * @macro:
1238  * FT_IS_CID_KEYED( face )
1239  *
1240  * @description:
1241  * A macro that returns true whenever a face object contains a CID-keyed
1242  * font. See the discussion of @FT_FACE_FLAG_CID_KEYED for more
1243  * details.
1244  *
1245  * If this macro is true, all functions defined in @FT_CID_H are
1246  * available.
1247  *
1248  */
1249 #define FT_IS_CID_KEYED( face ) \
1250  ( face->face_flags & FT_FACE_FLAG_CID_KEYED )
1251 
1252 
1253  /*************************************************************************
1254  *
1255  * @macro:
1256  * FT_IS_TRICKY( face )
1257  *
1258  * @description:
1259  * A macro that returns true whenever a face represents a `tricky' font.
1260  * See the discussion of @FT_FACE_FLAG_TRICKY for more details.
1261  *
1262  */
1263 #define FT_IS_TRICKY( face ) \
1264  ( face->face_flags & FT_FACE_FLAG_TRICKY )
1265 
1266 
1267  /*************************************************************************/
1268  /* */
1269  /* <Const> */
1270  /* FT_STYLE_FLAG_XXX */
1271  /* */
1272  /* <Description> */
1273  /* A list of bit-flags used to indicate the style of a given face. */
1274  /* These are used in the `style_flags' field of @FT_FaceRec. */
1275  /* */
1276  /* <Values> */
1277  /* FT_STYLE_FLAG_ITALIC :: */
1278  /* Indicates that a given face style is italic or oblique. */
1279  /* */
1280  /* FT_STYLE_FLAG_BOLD :: */
1281  /* Indicates that a given face is bold. */
1282  /* */
1283  /* <Note> */
1284  /* The style information as provided by FreeType is very basic. More */
1285  /* details are beyond the scope and should be done on a higher level */
1286  /* (for example, by analyzing various fields of the `OS/2' table in */
1287  /* SFNT based fonts). */
1288  /* */
1289 #define FT_STYLE_FLAG_ITALIC ( 1 << 0 )
1290 #define FT_STYLE_FLAG_BOLD ( 1 << 1 )
1291 
1292 
1293  /*************************************************************************/
1294  /* */
1295  /* <Type> */
1296  /* FT_Size_Internal */
1297  /* */
1298  /* <Description> */
1299  /* An opaque handle to an `FT_Size_InternalRec' structure, used to */
1300  /* model private data of a given @FT_Size object. */
1301  /* */
1302  typedef struct FT_Size_InternalRec_* FT_Size_Internal;
1303 
1304 
1305  /*************************************************************************/
1306  /* */
1307  /* <Struct> */
1308  /* FT_Size_Metrics */
1309  /* */
1310  /* <Description> */
1311  /* The size metrics structure gives the metrics of a size object. */
1312  /* */
1313  /* <Fields> */
1314  /* x_ppem :: The width of the scaled EM square in pixels, hence */
1315  /* the term `ppem' (pixels per EM). It is also */
1316  /* referred to as `nominal width'. */
1317  /* */
1318  /* y_ppem :: The height of the scaled EM square in pixels, */
1319  /* hence the term `ppem' (pixels per EM). It is also */
1320  /* referred to as `nominal height'. */
1321  /* */
1322  /* x_scale :: A 16.16 fractional scaling value used to convert */
1323  /* horizontal metrics from font units to 26.6 */
1324  /* fractional pixels. Only relevant for scalable */
1325  /* font formats. */
1326  /* */
1327  /* y_scale :: A 16.16 fractional scaling value used to convert */
1328  /* vertical metrics from font units to 26.6 */
1329  /* fractional pixels. Only relevant for scalable */
1330  /* font formats. */
1331  /* */
1332  /* ascender :: The ascender in 26.6 fractional pixels. See */
1333  /* @FT_FaceRec for the details. */
1334  /* */
1335  /* descender :: The descender in 26.6 fractional pixels. See */
1336  /* @FT_FaceRec for the details. */
1337  /* */
1338  /* height :: The height in 26.6 fractional pixels. See */
1339  /* @FT_FaceRec for the details. */
1340  /* */
1341  /* max_advance :: The maximal advance width in 26.6 fractional */
1342  /* pixels. See @FT_FaceRec for the details. */
1343  /* */
1344  /* <Note> */
1345  /* The scaling values, if relevant, are determined first during a */
1346  /* size changing operation. The remaining fields are then set by the */
1347  /* driver. For scalable formats, they are usually set to scaled */
1348  /* values of the corresponding fields in @FT_FaceRec. */
1349  /* */
1350  /* Note that due to glyph hinting, these values might not be exact */
1351  /* for certain fonts. Thus they must be treated as unreliable */
1352  /* with an error margin of at least one pixel! */
1353  /* */
1354  /* Indeed, the only way to get the exact metrics is to render _all_ */
1355  /* glyphs. As this would be a definite performance hit, it is up to */
1356  /* client applications to perform such computations. */
1357  /* */
1358  /* The FT_Size_Metrics structure is valid for bitmap fonts also. */
1359  /* */
1360  typedef struct FT_Size_Metrics_
1361  {
1362  FT_UShort x_ppem; /* horizontal pixels per EM */
1363  FT_UShort y_ppem; /* vertical pixels per EM */
1364 
1365  FT_Fixed x_scale; /* scaling values used to convert font */
1366  FT_Fixed y_scale; /* units to 26.6 fractional pixels */
1367 
1368  FT_Pos ascender; /* ascender in 26.6 frac. pixels */
1369  FT_Pos descender; /* descender in 26.6 frac. pixels */
1370  FT_Pos height; /* text height in 26.6 frac. pixels */
1371  FT_Pos max_advance; /* max horizontal advance, in 26.6 pixels */
1372 
1373  } FT_Size_Metrics;
1374 
1375 
1376  /*************************************************************************/
1377  /* */
1378  /* <Struct> */
1379  /* FT_SizeRec */
1380  /* */
1381  /* <Description> */
1382  /* FreeType root size class structure. A size object models a face */
1383  /* object at a given size. */
1384  /* */
1385  /* <Fields> */
1386  /* face :: Handle to the parent face object. */
1387  /* */
1388  /* generic :: A typeless pointer, which is unused by the FreeType */
1389  /* library or any of its drivers. It can be used by */
1390  /* client applications to link their own data to each size */
1391  /* object. */
1392  /* */
1393  /* metrics :: Metrics for this size object. This field is read-only. */
1394  /* */
1395  typedef struct FT_SizeRec_
1396  {
1397  FT_Face face; /* parent face object */
1398  FT_Generic generic; /* generic pointer for client uses */
1399  FT_Size_Metrics metrics; /* size metrics */
1400  FT_Size_Internal internal;
1401 
1402  } FT_SizeRec;
1403 
1404 
1405  /*************************************************************************/
1406  /* */
1407  /* <Struct> */
1408  /* FT_SubGlyph */
1409  /* */
1410  /* <Description> */
1411  /* The subglyph structure is an internal object used to describe */
1412  /* subglyphs (for example, in the case of composites). */
1413  /* */
1414  /* <Note> */
1415  /* The subglyph implementation is not part of the high-level API, */
1416  /* hence the forward structure declaration. */
1417  /* */
1418  /* You can however retrieve subglyph information with */
1419  /* @FT_Get_SubGlyph_Info. */
1420  /* */
1421  typedef struct FT_SubGlyphRec_* FT_SubGlyph;
1422 
1423 
1424  /*************************************************************************/
1425  /* */
1426  /* <Type> */
1427  /* FT_Slot_Internal */
1428  /* */
1429  /* <Description> */
1430  /* An opaque handle to an `FT_Slot_InternalRec' structure, used to */
1431  /* model private data of a given @FT_GlyphSlot object. */
1432  /* */
1433  typedef struct FT_Slot_InternalRec_* FT_Slot_Internal;
1434 
1435 
1436  /*************************************************************************/
1437  /* */
1438  /* <Struct> */
1439  /* FT_GlyphSlotRec */
1440  /* */
1441  /* <Description> */
1442  /* FreeType root glyph slot class structure. A glyph slot is a */
1443  /* container where individual glyphs can be loaded, be they in */
1444  /* outline or bitmap format. */
1445  /* */
1446  /* <Fields> */
1447  /* library :: A handle to the FreeType library instance */
1448  /* this slot belongs to. */
1449  /* */
1450  /* face :: A handle to the parent face object. */
1451  /* */
1452  /* next :: In some cases (like some font tools), several */
1453  /* glyph slots per face object can be a good */
1454  /* thing. As this is rare, the glyph slots are */
1455  /* listed through a direct, single-linked list */
1456  /* using its `next' field. */
1457  /* */
1458  /* generic :: A typeless pointer which is unused by the */
1459  /* FreeType library or any of its drivers. It */
1460  /* can be used by client applications to link */
1461  /* their own data to each glyph slot object. */
1462  /* */
1463  /* metrics :: The metrics of the last loaded glyph in the */
1464  /* slot. The returned values depend on the last */
1465  /* load flags (see the @FT_Load_Glyph API */
1466  /* function) and can be expressed either in 26.6 */
1467  /* fractional pixels or font units. */
1468  /* */
1469  /* Note that even when the glyph image is */
1470  /* transformed, the metrics are not. */
1471  /* */
1472  /* linearHoriAdvance :: The advance width of the unhinted glyph. */
1473  /* Its value is expressed in 16.16 fractional */
1474  /* pixels, unless @FT_LOAD_LINEAR_DESIGN is set */
1475  /* when loading the glyph. This field can be */
1476  /* important to perform correct WYSIWYG layout. */
1477  /* Only relevant for outline glyphs. */
1478  /* */
1479  /* linearVertAdvance :: The advance height of the unhinted glyph. */
1480  /* Its value is expressed in 16.16 fractional */
1481  /* pixels, unless @FT_LOAD_LINEAR_DESIGN is set */
1482  /* when loading the glyph. This field can be */
1483  /* important to perform correct WYSIWYG layout. */
1484  /* Only relevant for outline glyphs. */
1485  /* */
1486  /* advance :: This shorthand is, depending on */
1487  /* @FT_LOAD_IGNORE_TRANSFORM, the transformed */
1488  /* advance width for the glyph (in 26.6 */
1489  /* fractional pixel format). As specified with */
1490  /* @FT_LOAD_VERTICAL_LAYOUT, it uses either the */
1491  /* `horiAdvance' or the `vertAdvance' value of */
1492  /* `metrics' field. */
1493  /* */
1494  /* format :: This field indicates the format of the image */
1495  /* contained in the glyph slot. Typically */
1496  /* @FT_GLYPH_FORMAT_BITMAP, */
1497  /* @FT_GLYPH_FORMAT_OUTLINE, or */
1498  /* @FT_GLYPH_FORMAT_COMPOSITE, but others are */
1499  /* possible. */
1500  /* */
1501  /* bitmap :: This field is used as a bitmap descriptor */
1502  /* when the slot format is */
1503  /* @FT_GLYPH_FORMAT_BITMAP. Note that the */
1504  /* address and content of the bitmap buffer can */
1505  /* change between calls of @FT_Load_Glyph and a */
1506  /* few other functions. */
1507  /* */
1508  /* bitmap_left :: This is the bitmap's left bearing expressed */
1509  /* in integer pixels. Of course, this is only */
1510  /* valid if the format is */
1511  /* @FT_GLYPH_FORMAT_BITMAP. */
1512  /* */
1513  /* bitmap_top :: This is the bitmap's top bearing expressed in */
1514  /* integer pixels. Remember that this is the */
1515  /* distance from the baseline to the top-most */
1516  /* glyph scanline, upwards y~coordinates being */
1517  /* *positive*. */
1518  /* */
1519  /* outline :: The outline descriptor for the current glyph */
1520  /* image if its format is */
1521  /* @FT_GLYPH_FORMAT_OUTLINE. Once a glyph is */
1522  /* loaded, `outline' can be transformed, */
1523  /* distorted, embolded, etc. However, it must */
1524  /* not be freed. */
1525  /* */
1526  /* num_subglyphs :: The number of subglyphs in a composite glyph. */
1527  /* This field is only valid for the composite */
1528  /* glyph format that should normally only be */
1529  /* loaded with the @FT_LOAD_NO_RECURSE flag. */
1530  /* For now this is internal to FreeType. */
1531  /* */
1532  /* subglyphs :: An array of subglyph descriptors for */
1533  /* composite glyphs. There are `num_subglyphs' */
1534  /* elements in there. Currently internal to */
1535  /* FreeType. */
1536  /* */
1537  /* control_data :: Certain font drivers can also return the */
1538  /* control data for a given glyph image (e.g. */
1539  /* TrueType bytecode, Type~1 charstrings, etc.). */
1540  /* This field is a pointer to such data. */
1541  /* */
1542  /* control_len :: This is the length in bytes of the control */
1543  /* data. */
1544  /* */
1545  /* other :: Really wicked formats can use this pointer to */
1546  /* present their own glyph image to client */
1547  /* applications. Note that the application */
1548  /* needs to know about the image format. */
1549  /* */
1550  /* lsb_delta :: The difference between hinted and unhinted */
1551  /* left side bearing while autohinting is */
1552  /* active. Zero otherwise. */
1553  /* */
1554  /* rsb_delta :: The difference between hinted and unhinted */
1555  /* right side bearing while autohinting is */
1556  /* active. Zero otherwise. */
1557  /* */
1558  /* <Note> */
1559  /* If @FT_Load_Glyph is called with default flags (see */
1560  /* @FT_LOAD_DEFAULT) the glyph image is loaded in the glyph slot in */
1561  /* its native format (e.g., an outline glyph for TrueType and Type~1 */
1562  /* formats). */
1563  /* */
1564  /* This image can later be converted into a bitmap by calling */
1565  /* @FT_Render_Glyph. This function finds the current renderer for */
1566  /* the native image's format, then invokes it. */
1567  /* */
1568  /* The renderer is in charge of transforming the native image through */
1569  /* the slot's face transformation fields, then converting it into a */
1570  /* bitmap that is returned in `slot->bitmap'. */
1571  /* */
1572  /* Note that `slot->bitmap_left' and `slot->bitmap_top' are also used */
1573  /* to specify the position of the bitmap relative to the current pen */
1574  /* position (e.g., coordinates (0,0) on the baseline). Of course, */
1575  /* `slot->format' is also changed to @FT_GLYPH_FORMAT_BITMAP. */
1576  /* */
1577  /* <Note> */
1578  /* Here a small pseudo code fragment which shows how to use */
1579  /* `lsb_delta' and `rsb_delta': */
1580  /* */
1581  /* { */
1582  /* FT_Pos origin_x = 0; */
1583  /* FT_Pos prev_rsb_delta = 0; */
1584  /* */
1585  /* */
1586  /* for all glyphs do */
1587  /* <compute kern between current and previous glyph and add it to */
1588  /* `origin_x'> */
1589  /* */
1590  /* <load glyph with `FT_Load_Glyph'> */
1591  /* */
1592  /* if ( prev_rsb_delta - face->glyph->lsb_delta >= 32 ) */
1593  /* origin_x -= 64; */
1594  /* else if ( prev_rsb_delta - face->glyph->lsb_delta < -32 ) */
1595  /* origin_x += 64; */
1596  /* */
1597  /* prev_rsb_delta = face->glyph->rsb_delta; */
1598  /* */
1599  /* <save glyph image, or render glyph, or ...> */
1600  /* */
1601  /* origin_x += face->glyph->advance.x; */
1602  /* endfor */
1603  /* } */
1604  /* */
1605  typedef struct FT_GlyphSlotRec_
1606  {
1607  FT_Library library;
1608  FT_Face face;
1609  FT_GlyphSlot next;
1610  FT_UInt reserved; /* retained for binary compatibility */
1611  FT_Generic generic;
1612 
1613  FT_Glyph_Metrics metrics;
1614  FT_Fixed linearHoriAdvance;
1615  FT_Fixed linearVertAdvance;
1616  FT_Vector advance;
1617 
1618  FT_Glyph_Format format;
1619 
1620  FT_Bitmap bitmap;
1621  FT_Int bitmap_left;
1622  FT_Int bitmap_top;
1623 
1624  FT_Outline outline;
1625 
1626  FT_UInt num_subglyphs;
1627  FT_SubGlyph subglyphs;
1628 
1629  void* control_data;
1630  long control_len;
1631 
1632  FT_Pos lsb_delta;
1633  FT_Pos rsb_delta;
1634 
1635  void* other;
1636 
1637  FT_Slot_Internal internal;
1638 
1639  } FT_GlyphSlotRec;
1640 
1641 
1642  /*************************************************************************/
1643  /*************************************************************************/
1644  /* */
1645  /* F U N C T I O N S */
1646  /* */
1647  /*************************************************************************/
1648  /*************************************************************************/
1649 
1650 
1651  /*************************************************************************/
1652  /* */
1653  /* <Function> */
1654  /* FT_Init_FreeType */
1655  /* */
1656  /* <Description> */
1657  /* Initialize a new FreeType library object. The set of modules */
1658  /* that are registered by this function is determined at build time. */
1659  /* */
1660  /* <Output> */
1661  /* alibrary :: A handle to a new library object. */
1662  /* */
1663  /* <Return> */
1664  /* FreeType error code. 0~means success. */
1665  /* */
1666  /* <Note> */
1667  /* In case you want to provide your own memory allocating routines, */
1668  /* use @FT_New_Library instead, followed by a call to */
1669  /* @FT_Add_Default_Modules (or a series of calls to @FT_Add_Module). */
1670  /* */
1671  /* For multi-threading applications each thread should have its own */
1672  /* FT_Library object. */
1673  /* */
1674  FT_EXPORT( FT_Error )
1675  FT_Init_FreeType( FT_Library *alibrary );
1676 
1677 
1678  /*************************************************************************/
1679  /* */
1680  /* <Function> */
1681  /* FT_Done_FreeType */
1682  /* */
1683  /* <Description> */
1684  /* Destroy a given FreeType library object and all of its children, */
1685  /* including resources, drivers, faces, sizes, etc. */
1686  /* */
1687  /* <Input> */
1688  /* library :: A handle to the target library object. */
1689  /* */
1690  /* <Return> */
1691  /* FreeType error code. 0~means success. */
1692  /* */
1693  FT_EXPORT( FT_Error )
1694  FT_Done_FreeType( FT_Library library );
1695 
1696 
1697  /*************************************************************************/
1698  /* */
1699  /* <Enum> */
1700  /* FT_OPEN_XXX */
1701  /* */
1702  /* <Description> */
1703  /* A list of bit-field constants used within the `flags' field of the */
1704  /* @FT_Open_Args structure. */
1705  /* */
1706  /* <Values> */
1707  /* FT_OPEN_MEMORY :: This is a memory-based stream. */
1708  /* */
1709  /* FT_OPEN_STREAM :: Copy the stream from the `stream' field. */
1710  /* */
1711  /* FT_OPEN_PATHNAME :: Create a new input stream from a C~path */
1712  /* name. */
1713  /* */
1714  /* FT_OPEN_DRIVER :: Use the `driver' field. */
1715  /* */
1716  /* FT_OPEN_PARAMS :: Use the `num_params' and `params' fields. */
1717  /* */
1718  /* ft_open_memory :: Deprecated; use @FT_OPEN_MEMORY instead. */
1719  /* */
1720  /* ft_open_stream :: Deprecated; use @FT_OPEN_STREAM instead. */
1721  /* */
1722  /* ft_open_pathname :: Deprecated; use @FT_OPEN_PATHNAME instead. */
1723  /* */
1724  /* ft_open_driver :: Deprecated; use @FT_OPEN_DRIVER instead. */
1725  /* */
1726  /* ft_open_params :: Deprecated; use @FT_OPEN_PARAMS instead. */
1727  /* */
1728  /* <Note> */
1729  /* The `FT_OPEN_MEMORY', `FT_OPEN_STREAM', and `FT_OPEN_PATHNAME' */
1730  /* flags are mutually exclusive. */
1731  /* */
1732 #define FT_OPEN_MEMORY 0x1
1733 #define FT_OPEN_STREAM 0x2
1734 #define FT_OPEN_PATHNAME 0x4
1735 #define FT_OPEN_DRIVER 0x8
1736 #define FT_OPEN_PARAMS 0x10
1737 
1738 #define ft_open_memory FT_OPEN_MEMORY /* deprecated */
1739 #define ft_open_stream FT_OPEN_STREAM /* deprecated */
1740 #define ft_open_pathname FT_OPEN_PATHNAME /* deprecated */
1741 #define ft_open_driver FT_OPEN_DRIVER /* deprecated */
1742 #define ft_open_params FT_OPEN_PARAMS /* deprecated */
1743 
1744 
1745  /*************************************************************************/
1746  /* */
1747  /* <Struct> */
1748  /* FT_Parameter */
1749  /* */
1750  /* <Description> */
1751  /* A simple structure used to pass more or less generic parameters to */
1752  /* @FT_Open_Face. */
1753  /* */
1754  /* <Fields> */
1755  /* tag :: A four-byte identification tag. */
1756  /* */
1757  /* data :: A pointer to the parameter data. */
1758  /* */
1759  /* <Note> */
1760  /* The ID and function of parameters are driver-specific. See the */
1761  /* various FT_PARAM_TAG_XXX flags for more information. */
1762  /* */
1763  typedef struct FT_Parameter_
1764  {
1765  FT_ULong tag;
1766  FT_Pointer data;
1767 
1768  } FT_Parameter;
1769 
1770 
1771  /*************************************************************************/
1772  /* */
1773  /* <Struct> */
1774  /* FT_Open_Args */
1775  /* */
1776  /* <Description> */
1777  /* A structure used to indicate how to open a new font file or */
1778  /* stream. A pointer to such a structure can be used as a parameter */
1779  /* for the functions @FT_Open_Face and @FT_Attach_Stream. */
1780  /* */
1781  /* <Fields> */
1782  /* flags :: A set of bit flags indicating how to use the */
1783  /* structure. */
1784  /* */
1785  /* memory_base :: The first byte of the file in memory. */
1786  /* */
1787  /* memory_size :: The size in bytes of the file in memory. */
1788  /* */
1789  /* pathname :: A pointer to an 8-bit file pathname. */
1790  /* */
1791  /* stream :: A handle to a source stream object. */
1792  /* */
1793  /* driver :: This field is exclusively used by @FT_Open_Face; */
1794  /* it simply specifies the font driver to use to open */
1795  /* the face. If set to~0, FreeType tries to load the */
1796  /* face with each one of the drivers in its list. */
1797  /* */
1798  /* num_params :: The number of extra parameters. */
1799  /* */
1800  /* params :: Extra parameters passed to the font driver when */
1801  /* opening a new face. */
1802  /* */
1803  /* <Note> */
1804  /* The stream type is determined by the contents of `flags' which */
1805  /* are tested in the following order by @FT_Open_Face: */
1806  /* */
1807  /* If the `FT_OPEN_MEMORY' bit is set, assume that this is a */
1808  /* memory file of `memory_size' bytes, located at `memory_address'. */
1809  /* The data are are not copied, and the client is responsible for */
1810  /* releasing and destroying them _after_ the corresponding call to */
1811  /* @FT_Done_Face. */
1812  /* */
1813  /* Otherwise, if the `FT_OPEN_STREAM' bit is set, assume that a */
1814  /* custom input stream `stream' is used. */
1815  /* */
1816  /* Otherwise, if the `FT_OPEN_PATHNAME' bit is set, assume that this */
1817  /* is a normal file and use `pathname' to open it. */
1818  /* */
1819  /* If the `FT_OPEN_DRIVER' bit is set, @FT_Open_Face only tries to */
1820  /* open the file with the driver whose handler is in `driver'. */
1821  /* */
1822  /* If the `FT_OPEN_PARAMS' bit is set, the parameters given by */
1823  /* `num_params' and `params' is used. They are ignored otherwise. */
1824  /* */
1825  /* Ideally, both the `pathname' and `params' fields should be tagged */
1826  /* as `const'; this is missing for API backwards compatibility. In */
1827  /* other words, applications should treat them as read-only. */
1828  /* */
1829  typedef struct FT_Open_Args_
1830  {
1831  FT_UInt flags;
1832  const FT_Byte* memory_base;
1833  FT_Long memory_size;
1834  FT_String* pathname;
1835  FT_Stream stream;
1836  FT_Module driver;
1837  FT_Int num_params;
1838  FT_Parameter* params;
1839 
1840  } FT_Open_Args;
1841 
1842 
1843  /*************************************************************************/
1844  /* */
1845  /* <Function> */
1846  /* FT_New_Face */
1847  /* */
1848  /* <Description> */
1849  /* This function calls @FT_Open_Face to open a font by its pathname. */
1850  /* */
1851  /* <InOut> */
1852  /* library :: A handle to the library resource. */
1853  /* */
1854  /* <Input> */
1855  /* pathname :: A path to the font file. */
1856  /* */
1857  /* face_index :: The index of the face within the font. The first */
1858  /* face has index~0. */
1859  /* */
1860  /* <Output> */
1861  /* aface :: A handle to a new face object. If `face_index' is */
1862  /* greater than or equal to zero, it must be non-NULL. */
1863  /* See @FT_Open_Face for more details. */
1864  /* */
1865  /* <Return> */
1866  /* FreeType error code. 0~means success. */
1867  /* */
1868  FT_EXPORT( FT_Error )
1869  FT_New_Face( FT_Library library,
1870  const char* filepathname,
1871  FT_Long face_index,
1872  FT_Face *aface );
1873 
1874 
1875  /*************************************************************************/
1876  /* */
1877  /* <Function> */
1878  /* FT_New_Memory_Face */
1879  /* */
1880  /* <Description> */
1881  /* This function calls @FT_Open_Face to open a font which has been */
1882  /* loaded into memory. */
1883  /* */
1884  /* <InOut> */
1885  /* library :: A handle to the library resource. */
1886  /* */
1887  /* <Input> */
1888  /* file_base :: A pointer to the beginning of the font data. */
1889  /* */
1890  /* file_size :: The size of the memory chunk used by the font data. */
1891  /* */
1892  /* face_index :: The index of the face within the font. The first */
1893  /* face has index~0. */
1894  /* */
1895  /* <Output> */
1896  /* aface :: A handle to a new face object. If `face_index' is */
1897  /* greater than or equal to zero, it must be non-NULL. */
1898  /* See @FT_Open_Face for more details. */
1899  /* */
1900  /* <Return> */
1901  /* FreeType error code. 0~means success. */
1902  /* */
1903  /* <Note> */
1904  /* You must not deallocate the memory before calling @FT_Done_Face. */
1905  /* */
1906  FT_EXPORT( FT_Error )
1907  FT_New_Memory_Face( FT_Library library,
1908  const FT_Byte* file_base,
1909  FT_Long file_size,
1910  FT_Long face_index,
1911  FT_Face *aface );
1912 
1913 
1914  /*************************************************************************/
1915  /* */
1916  /* <Function> */
1917  /* FT_Open_Face */
1918  /* */
1919  /* <Description> */
1920  /* Create a face object from a given resource described by */
1921  /* @FT_Open_Args. */
1922  /* */
1923  /* <InOut> */
1924  /* library :: A handle to the library resource. */
1925  /* */
1926  /* <Input> */
1927  /* args :: A pointer to an `FT_Open_Args' structure which must */
1928  /* be filled by the caller. */
1929  /* */
1930  /* face_index :: The index of the face within the font. The first */
1931  /* face has index~0. */
1932  /* */
1933  /* <Output> */
1934  /* aface :: A handle to a new face object. If `face_index' is */
1935  /* greater than or equal to zero, it must be non-NULL. */
1936  /* See note below. */
1937  /* */
1938  /* <Return> */
1939  /* FreeType error code. 0~means success. */
1940  /* */
1941  /* <Note> */
1942  /* Unlike FreeType 1.x, this function automatically creates a glyph */
1943  /* slot for the face object which can be accessed directly through */
1944  /* `face->glyph'. */
1945  /* */
1946  /* FT_Open_Face can be used to quickly check whether the font */
1947  /* format of a given font resource is supported by FreeType. If the */
1948  /* `face_index' field is negative, the function's return value is~0 */
1949  /* if the font format is recognized, or non-zero otherwise; */
1950  /* the function returns a more or less empty face handle in `*aface' */
1951  /* (if `aface' isn't NULL). The only useful field in this special */
1952  /* case is `face->num_faces' which gives the number of faces within */
1953  /* the font file. After examination, the returned @FT_Face structure */
1954  /* should be deallocated with a call to @FT_Done_Face. */
1955  /* */
1956  /* Each new face object created with this function also owns a */
1957  /* default @FT_Size object, accessible as `face->size'. */
1958  /* */
1959  /* One @FT_Library instance can have multiple face objects, this is, */
1960  /* @FT_Open_Face and its siblings can be called multiple times using */
1961  /* the same `library' argument. */
1962  /* */
1963  /* See the discussion of reference counters in the description of */
1964  /* @FT_Reference_Face. */
1965  /* */
1966  FT_EXPORT( FT_Error )
1967  FT_Open_Face( FT_Library library,
1968  const FT_Open_Args* args,
1969  FT_Long face_index,
1970  FT_Face *aface );
1971 
1972 
1973  /*************************************************************************/
1974  /* */
1975  /* <Function> */
1976  /* FT_Attach_File */
1977  /* */
1978  /* <Description> */
1979  /* This function calls @FT_Attach_Stream to attach a file. */
1980  /* */
1981  /* <InOut> */
1982  /* face :: The target face object. */
1983  /* */
1984  /* <Input> */
1985  /* filepathname :: The pathname. */
1986  /* */
1987  /* <Return> */
1988  /* FreeType error code. 0~means success. */
1989  /* */
1990  FT_EXPORT( FT_Error )
1991  FT_Attach_File( FT_Face face,
1992  const char* filepathname );
1993 
1994 
1995  /*************************************************************************/
1996  /* */
1997  /* <Function> */
1998  /* FT_Attach_Stream */
1999  /* */
2000  /* <Description> */
2001  /* `Attach' data to a face object. Normally, this is used to read */
2002  /* additional information for the face object. For example, you can */
2003  /* attach an AFM file that comes with a Type~1 font to get the */
2004  /* kerning values and other metrics. */
2005  /* */
2006  /* <InOut> */
2007  /* face :: The target face object. */
2008  /* */
2009  /* <Input> */
2010  /* parameters :: A pointer to @FT_Open_Args which must be filled by */
2011  /* the caller. */
2012  /* */
2013  /* <Return> */
2014  /* FreeType error code. 0~means success. */
2015  /* */
2016  /* <Note> */
2017  /* The meaning of the `attach' (i.e., what really happens when the */
2018  /* new file is read) is not fixed by FreeType itself. It really */
2019  /* depends on the font format (and thus the font driver). */
2020  /* */
2021  /* Client applications are expected to know what they are doing */
2022  /* when invoking this function. Most drivers simply do not implement */
2023  /* file attachments. */
2024  /* */
2025  FT_EXPORT( FT_Error )
2026  FT_Attach_Stream( FT_Face face,
2027  FT_Open_Args* parameters );
2028 
2029 
2030  /*************************************************************************/
2031  /* */
2032  /* <Function> */
2033  /* FT_Reference_Face */
2034  /* */
2035  /* <Description> */
2036  /* A counter gets initialized to~1 at the time an @FT_Face structure */
2037  /* is created. This function increments the counter. @FT_Done_Face */
2038  /* then only destroys a face if the counter is~1, otherwise it simply */
2039  /* decrements the counter. */
2040  /* */
2041  /* This function helps in managing life-cycles of structures which */
2042  /* reference @FT_Face objects. */
2043  /* */
2044  /* <Input> */
2045  /* face :: A handle to a target face object. */
2046  /* */
2047  /* <Return> */
2048  /* FreeType error code. 0~means success. */
2049  /* */
2050  /* <Since> */
2051  /* 2.4.2 */
2052  /* */
2053  FT_EXPORT( FT_Error )
2054  FT_Reference_Face( FT_Face face );
2055 
2056 
2057  /*************************************************************************/
2058  /* */
2059  /* <Function> */
2060  /* FT_Done_Face */
2061  /* */
2062  /* <Description> */
2063  /* Discard a given face object, as well as all of its child slots and */
2064  /* sizes. */
2065  /* */
2066  /* <Input> */
2067  /* face :: A handle to a target face object. */
2068  /* */
2069  /* <Return> */
2070  /* FreeType error code. 0~means success. */
2071  /* */
2072  /* <Note> */
2073  /* See the discussion of reference counters in the description of */
2074  /* @FT_Reference_Face. */
2075  /* */
2076  FT_EXPORT( FT_Error )
2077  FT_Done_Face( FT_Face face );
2078 
2079 
2080  /*************************************************************************/
2081  /* */
2082  /* <Function> */
2083  /* FT_Select_Size */
2084  /* */
2085  /* <Description> */
2086  /* Select a bitmap strike. */
2087  /* */
2088  /* <InOut> */
2089  /* face :: A handle to a target face object. */
2090  /* */
2091  /* <Input> */
2092  /* strike_index :: The index of the bitmap strike in the */
2093  /* `available_sizes' field of @FT_FaceRec structure. */
2094  /* */
2095  /* <Return> */
2096  /* FreeType error code. 0~means success. */
2097  /* */
2098  FT_EXPORT( FT_Error )
2099  FT_Select_Size( FT_Face face,
2100  FT_Int strike_index );
2101 
2102 
2103  /*************************************************************************/
2104  /* */
2105  /* <Enum> */
2106  /* FT_Size_Request_Type */
2107  /* */
2108  /* <Description> */
2109  /* An enumeration type that lists the supported size request types. */
2110  /* */
2111  /* <Values> */
2112  /* FT_SIZE_REQUEST_TYPE_NOMINAL :: */
2113  /* The nominal size. The `units_per_EM' field of @FT_FaceRec is */
2114  /* used to determine both scaling values. */
2115  /* */
2116  /* FT_SIZE_REQUEST_TYPE_REAL_DIM :: */
2117  /* The real dimension. The sum of the the `ascender' and (minus */
2118  /* of) the `descender' fields of @FT_FaceRec are used to determine */
2119  /* both scaling values. */
2120  /* */
2121  /* FT_SIZE_REQUEST_TYPE_BBOX :: */
2122  /* The font bounding box. The width and height of the `bbox' field */
2123  /* of @FT_FaceRec are used to determine the horizontal and vertical */
2124  /* scaling value, respectively. */
2125  /* */
2126  /* FT_SIZE_REQUEST_TYPE_CELL :: */
2127  /* The `max_advance_width' field of @FT_FaceRec is used to */
2128  /* determine the horizontal scaling value; the vertical scaling */
2129  /* value is determined the same way as */
2130  /* @FT_SIZE_REQUEST_TYPE_REAL_DIM does. Finally, both scaling */
2131  /* values are set to the smaller one. This type is useful if you */
2132  /* want to specify the font size for, say, a window of a given */
2133  /* dimension and 80x24 cells. */
2134  /* */
2135  /* FT_SIZE_REQUEST_TYPE_SCALES :: */
2136  /* Specify the scaling values directly. */
2137  /* */
2138  /* <Note> */
2139  /* The above descriptions only apply to scalable formats. For bitmap */
2140  /* formats, the behaviour is up to the driver. */
2141  /* */
2142  /* See the note section of @FT_Size_Metrics if you wonder how size */
2143  /* requesting relates to scaling values. */
2144  /* */
2145  typedef enum FT_Size_Request_Type_
2146  {
2147  FT_SIZE_REQUEST_TYPE_NOMINAL,
2148  FT_SIZE_REQUEST_TYPE_REAL_DIM,
2149  FT_SIZE_REQUEST_TYPE_BBOX,
2150  FT_SIZE_REQUEST_TYPE_CELL,
2151  FT_SIZE_REQUEST_TYPE_SCALES,
2152 
2153  FT_SIZE_REQUEST_TYPE_MAX
2154 
2155  } FT_Size_Request_Type;
2156 
2157 
2158  /*************************************************************************/
2159  /* */
2160  /* <Struct> */
2161  /* FT_Size_RequestRec */
2162  /* */
2163  /* <Description> */
2164  /* A structure used to model a size request. */
2165  /* */
2166  /* <Fields> */
2167  /* type :: See @FT_Size_Request_Type. */
2168  /* */
2169  /* width :: The desired width. */
2170  /* */
2171  /* height :: The desired height. */
2172  /* */
2173  /* horiResolution :: The horizontal resolution. If set to zero, */
2174  /* `width' is treated as a 26.6 fractional pixel */
2175  /* value. */
2176  /* */
2177  /* vertResolution :: The vertical resolution. If set to zero, */
2178  /* `height' is treated as a 26.6 fractional pixel */
2179  /* value. */
2180  /* */
2181  /* <Note> */
2182  /* If `width' is zero, then the horizontal scaling value is set equal */
2183  /* to the vertical scaling value, and vice versa. */
2184  /* */
2185  typedef struct FT_Size_RequestRec_
2186  {
2187  FT_Size_Request_Type type;
2188  FT_Long width;
2189  FT_Long height;
2190  FT_UInt horiResolution;
2191  FT_UInt vertResolution;
2192 
2193  } FT_Size_RequestRec;
2194 
2195 
2196  /*************************************************************************/
2197  /* */
2198  /* <Struct> */
2199  /* FT_Size_Request */
2200  /* */
2201  /* <Description> */
2202  /* A handle to a size request structure. */
2203  /* */
2204  typedef struct FT_Size_RequestRec_ *FT_Size_Request;
2205 
2206 
2207  /*************************************************************************/
2208  /* */
2209  /* <Function> */
2210  /* FT_Request_Size */
2211  /* */
2212  /* <Description> */
2213  /* Resize the scale of the active @FT_Size object in a face. */
2214  /* */
2215  /* <InOut> */
2216  /* face :: A handle to a target face object. */
2217  /* */
2218  /* <Input> */
2219  /* req :: A pointer to a @FT_Size_RequestRec. */
2220  /* */
2221  /* <Return> */
2222  /* FreeType error code. 0~means success. */
2223  /* */
2224  /* <Note> */
2225  /* Although drivers may select the bitmap strike matching the */
2226  /* request, you should not rely on this if you intend to select a */
2227  /* particular bitmap strike. Use @FT_Select_Size instead in that */
2228  /* case. */
2229  /* */
2230  FT_EXPORT( FT_Error )
2231  FT_Request_Size( FT_Face face,
2232  FT_Size_Request req );
2233 
2234 
2235  /*************************************************************************/
2236  /* */
2237  /* <Function> */
2238  /* FT_Set_Char_Size */
2239  /* */
2240  /* <Description> */
2241  /* This function calls @FT_Request_Size to request the nominal size */
2242  /* (in points). */
2243  /* */
2244  /* <InOut> */
2245  /* face :: A handle to a target face object. */
2246  /* */
2247  /* <Input> */
2248  /* char_width :: The nominal width, in 26.6 fractional points. */
2249  /* */
2250  /* char_height :: The nominal height, in 26.6 fractional points. */
2251  /* */
2252  /* horz_resolution :: The horizontal resolution in dpi. */
2253  /* */
2254  /* vert_resolution :: The vertical resolution in dpi. */
2255  /* */
2256  /* <Return> */
2257  /* FreeType error code. 0~means success. */
2258  /* */
2259  /* <Note> */
2260  /* If either the character width or height is zero, it is set equal */
2261  /* to the other value. */
2262  /* */
2263  /* If either the horizontal or vertical resolution is zero, it is set */
2264  /* equal to the other value. */
2265  /* */
2266  /* A character width or height smaller than 1pt is set to 1pt; if */
2267  /* both resolution values are zero, they are set to 72dpi. */
2268  /* */
2269  /* Don't use this function if you are using the FreeType cache API. */
2270  /* */
2271  FT_EXPORT( FT_Error )
2272  FT_Set_Char_Size( FT_Face face,
2273  FT_F26Dot6 char_width,
2274  FT_F26Dot6 char_height,
2275  FT_UInt horz_resolution,
2276  FT_UInt vert_resolution );
2277 
2278 
2279  /*************************************************************************/
2280  /* */
2281  /* <Function> */
2282  /* FT_Set_Pixel_Sizes */
2283  /* */
2284  /* <Description> */
2285  /* This function calls @FT_Request_Size to request the nominal size */
2286  /* (in pixels). */
2287  /* */
2288  /* <InOut> */
2289  /* face :: A handle to the target face object. */
2290  /* */
2291  /* <Input> */
2292  /* pixel_width :: The nominal width, in pixels. */
2293  /* */
2294  /* pixel_height :: The nominal height, in pixels. */
2295  /* */
2296  /* <Return> */
2297  /* FreeType error code. 0~means success. */
2298  /* */
2299  FT_EXPORT( FT_Error )
2300  FT_Set_Pixel_Sizes( FT_Face face,
2301  FT_UInt pixel_width,
2302  FT_UInt pixel_height );
2303 
2304 
2305  /*************************************************************************/
2306  /* */
2307  /* <Function> */
2308  /* FT_Load_Glyph */
2309  /* */
2310  /* <Description> */
2311  /* A function used to load a single glyph into the glyph slot of a */
2312  /* face object. */
2313  /* */
2314  /* <InOut> */
2315  /* face :: A handle to the target face object where the glyph */
2316  /* is loaded. */
2317  /* */
2318  /* <Input> */
2319  /* glyph_index :: The index of the glyph in the font file. For */
2320  /* CID-keyed fonts (either in PS or in CFF format) */
2321  /* this argument specifies the CID value. */
2322  /* */
2323  /* load_flags :: A flag indicating what to load for this glyph. The */
2324  /* @FT_LOAD_XXX constants can be used to control the */
2325  /* glyph loading process (e.g., whether the outline */
2326  /* should be scaled, whether to load bitmaps or not, */
2327  /* whether to hint the outline, etc). */
2328  /* */
2329  /* <Return> */
2330  /* FreeType error code. 0~means success. */
2331  /* */
2332  /* <Note> */
2333  /* The loaded glyph may be transformed. See @FT_Set_Transform for */
2334  /* the details. */
2335  /* */
2336  /* For subsetted CID-keyed fonts, `FT_Err_Invalid_Argument' is */
2337  /* returned for invalid CID values (this is, for CID values which */
2338  /* don't have a corresponding glyph in the font). See the discussion */
2339  /* of the @FT_FACE_FLAG_CID_KEYED flag for more details. */
2340  /* */
2341  FT_EXPORT( FT_Error )
2342  FT_Load_Glyph( FT_Face face,
2343  FT_UInt glyph_index,
2344  FT_Int32 load_flags );
2345 
2346 
2347  /*************************************************************************/
2348  /* */
2349  /* <Function> */
2350  /* FT_Load_Char */
2351  /* */
2352  /* <Description> */
2353  /* A function used to load a single glyph into the glyph slot of a */
2354  /* face object, according to its character code. */
2355  /* */
2356  /* <InOut> */
2357  /* face :: A handle to a target face object where the glyph */
2358  /* is loaded. */
2359  /* */
2360  /* <Input> */
2361  /* char_code :: The glyph's character code, according to the */
2362  /* current charmap used in the face. */
2363  /* */
2364  /* load_flags :: A flag indicating what to load for this glyph. The */
2365  /* @FT_LOAD_XXX constants can be used to control the */
2366  /* glyph loading process (e.g., whether the outline */
2367  /* should be scaled, whether to load bitmaps or not, */
2368  /* whether to hint the outline, etc). */
2369  /* */
2370  /* <Return> */
2371  /* FreeType error code. 0~means success. */
2372  /* */
2373  /* <Note> */
2374  /* This function simply calls @FT_Get_Char_Index and @FT_Load_Glyph. */
2375  /* */
2376  FT_EXPORT( FT_Error )
2377  FT_Load_Char( FT_Face face,
2378  FT_ULong char_code,
2379  FT_Int32 load_flags );
2380 
2381 
2382  /*************************************************************************
2383  *
2384  * @enum:
2385  * FT_LOAD_XXX
2386  *
2387  * @description:
2388  * A list of bit-field constants used with @FT_Load_Glyph to indicate
2389  * what kind of operations to perform during glyph loading.
2390  *
2391  * @values:
2392  * FT_LOAD_DEFAULT ::
2393  * Corresponding to~0, this value is used as the default glyph load
2394  * operation. In this case, the following happens:
2395  *
2396  * 1. FreeType looks for a bitmap for the glyph corresponding to the
2397  * face's current size. If one is found, the function returns.
2398  * The bitmap data can be accessed from the glyph slot (see note
2399  * below).
2400  *
2401  * 2. If no embedded bitmap is searched or found, FreeType looks for a
2402  * scalable outline. If one is found, it is loaded from the font
2403  * file, scaled to device pixels, then `hinted' to the pixel grid
2404  * in order to optimize it. The outline data can be accessed from
2405  * the glyph slot (see note below).
2406  *
2407  * Note that by default, the glyph loader doesn't render outlines into
2408  * bitmaps. The following flags are used to modify this default
2409  * behaviour to more specific and useful cases.
2410  *
2411  * FT_LOAD_NO_SCALE ::
2412  * Don't scale the outline glyph loaded, but keep it in font units.
2413  *
2414  * This flag implies @FT_LOAD_NO_HINTING and @FT_LOAD_NO_BITMAP, and
2415  * unsets @FT_LOAD_RENDER.
2416  *
2417  * FT_LOAD_NO_HINTING ::
2418  * Disable hinting. This generally generates `blurrier' bitmap glyph
2419  * when the glyph is rendered in any of the anti-aliased modes. See
2420  * also the note below.
2421  *
2422  * This flag is implied by @FT_LOAD_NO_SCALE.
2423  *
2424  * FT_LOAD_RENDER ::
2425  * Call @FT_Render_Glyph after the glyph is loaded. By default, the
2426  * glyph is rendered in @FT_RENDER_MODE_NORMAL mode. This can be
2427  * overridden by @FT_LOAD_TARGET_XXX or @FT_LOAD_MONOCHROME.
2428  *
2429  * This flag is unset by @FT_LOAD_NO_SCALE.
2430  *
2431  * FT_LOAD_NO_BITMAP ::
2432  * Ignore bitmap strikes when loading. Bitmap-only fonts ignore this
2433  * flag.
2434  *
2435  * @FT_LOAD_NO_SCALE always sets this flag.
2436  *
2437  * FT_LOAD_VERTICAL_LAYOUT ::
2438  * Load the glyph for vertical text layout. _Don't_ use it as it is
2439  * problematic currently.
2440  *
2441  * FT_LOAD_FORCE_AUTOHINT ::
2442  * Indicates that the auto-hinter is preferred over the font's native
2443  * hinter. See also the note below.
2444  *
2445  * FT_LOAD_CROP_BITMAP ::
2446  * Indicates that the font driver should crop the loaded bitmap glyph
2447  * (i.e., remove all space around its black bits). Not all drivers
2448  * implement this.
2449  *
2450  * FT_LOAD_PEDANTIC ::
2451  * Indicates that the font driver should perform pedantic verifications
2452  * during glyph loading. This is mostly used to detect broken glyphs
2453  * in fonts. By default, FreeType tries to handle broken fonts also.
2454  *
2455  * In particular, errors from the TrueType bytecode engine are not
2456  * passed to the application if this flag is not set; this might
2457  * result in partially hinted or distorted glyphs in case a glyph's
2458  * bytecode is buggy.
2459  *
2460  * FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH ::
2461  * Ignored. Deprecated.
2462  *
2463  * FT_LOAD_NO_RECURSE ::
2464  * This flag is only used internally. It merely indicates that the
2465  * font driver should not load composite glyphs recursively. Instead,
2466  * it should set the `num_subglyph' and `subglyphs' values of the
2467  * glyph slot accordingly, and set `glyph->format' to
2468  * @FT_GLYPH_FORMAT_COMPOSITE.
2469  *
2470  * The description of sub-glyphs is not available to client
2471  * applications for now.
2472  *
2473  * This flag implies @FT_LOAD_NO_SCALE and @FT_LOAD_IGNORE_TRANSFORM.
2474  *
2475  * FT_LOAD_IGNORE_TRANSFORM ::
2476  * Indicates that the transform matrix set by @FT_Set_Transform should
2477  * be ignored.
2478  *
2479  * FT_LOAD_MONOCHROME ::
2480  * This flag is used with @FT_LOAD_RENDER to indicate that you want to
2481  * render an outline glyph to a 1-bit monochrome bitmap glyph, with
2482  * 8~pixels packed into each byte of the bitmap data.
2483  *
2484  * Note that this has no effect on the hinting algorithm used. You
2485  * should rather use @FT_LOAD_TARGET_MONO so that the
2486  * monochrome-optimized hinting algorithm is used.
2487  *
2488  * FT_LOAD_LINEAR_DESIGN ::
2489  * Indicates that the `linearHoriAdvance' and `linearVertAdvance'
2490  * fields of @FT_GlyphSlotRec should be kept in font units. See
2491  * @FT_GlyphSlotRec for details.
2492  *
2493  * FT_LOAD_NO_AUTOHINT ::
2494  * Disable auto-hinter. See also the note below.
2495  *
2496  * @note:
2497  * By default, hinting is enabled and the font's native hinter (see
2498  * @FT_FACE_FLAG_HINTER) is preferred over the auto-hinter. You can
2499  * disable hinting by setting @FT_LOAD_NO_HINTING or change the
2500  * precedence by setting @FT_LOAD_FORCE_AUTOHINT. You can also set
2501  * @FT_LOAD_NO_AUTOHINT in case you don't want the auto-hinter to be
2502  * used at all.
2503  *
2504  * See the description of @FT_FACE_FLAG_TRICKY for a special exception
2505  * (affecting only a handful of Asian fonts).
2506  *
2507  * Besides deciding which hinter to use, you can also decide which
2508  * hinting algorithm to use. See @FT_LOAD_TARGET_XXX for details.
2509  *
2510  */
2511 #define FT_LOAD_DEFAULT 0x0
2512 #define FT_LOAD_NO_SCALE ( 1L << 0 )
2513 #define FT_LOAD_NO_HINTING ( 1L << 1 )
2514 #define FT_LOAD_RENDER ( 1L << 2 )
2515 #define FT_LOAD_NO_BITMAP ( 1L << 3 )
2516 #define FT_LOAD_VERTICAL_LAYOUT ( 1L << 4 )
2517 #define FT_LOAD_FORCE_AUTOHINT ( 1L << 5 )
2518 #define FT_LOAD_CROP_BITMAP ( 1L << 6 )
2519 #define FT_LOAD_PEDANTIC ( 1L << 7 )
2520 #define FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH ( 1L << 9 )
2521 #define FT_LOAD_NO_RECURSE ( 1L << 10 )
2522 #define FT_LOAD_IGNORE_TRANSFORM ( 1L << 11 )
2523 #define FT_LOAD_MONOCHROME ( 1L << 12 )
2524 #define FT_LOAD_LINEAR_DESIGN ( 1L << 13 )
2525 #define FT_LOAD_NO_AUTOHINT ( 1L << 15 )
2526 
2527  /* */
2528 
2529  /* used internally only by certain font drivers! */
2530 #define FT_LOAD_ADVANCE_ONLY ( 1L << 8 )
2531 #define FT_LOAD_SBITS_ONLY ( 1L << 14 )
2532 
2533 
2534  /**************************************************************************
2535  *
2536  * @enum:
2537  * FT_LOAD_TARGET_XXX
2538  *
2539  * @description:
2540  * A list of values that are used to select a specific hinting algorithm
2541  * to use by the hinter. You should OR one of these values to your
2542  * `load_flags' when calling @FT_Load_Glyph.
2543  *
2544  * Note that font's native hinters may ignore the hinting algorithm you
2545  * have specified (e.g., the TrueType bytecode interpreter). You can set
2546  * @FT_LOAD_FORCE_AUTOHINT to ensure that the auto-hinter is used.
2547  *
2548  * Also note that @FT_LOAD_TARGET_LIGHT is an exception, in that it
2549  * always implies @FT_LOAD_FORCE_AUTOHINT.
2550  *
2551  * @values:
2552  * FT_LOAD_TARGET_NORMAL ::
2553  * This corresponds to the default hinting algorithm, optimized for
2554  * standard gray-level rendering. For monochrome output, use
2555  * @FT_LOAD_TARGET_MONO instead.
2556  *
2557  * FT_LOAD_TARGET_LIGHT ::
2558  * A lighter hinting algorithm for non-monochrome modes. Many
2559  * generated glyphs are more fuzzy but better resemble its original
2560  * shape. A bit like rendering on Mac OS~X.
2561  *
2562  * As a special exception, this target implies @FT_LOAD_FORCE_AUTOHINT.
2563  *
2564  * FT_LOAD_TARGET_MONO ::
2565  * Strong hinting algorithm that should only be used for monochrome
2566  * output. The result is probably unpleasant if the glyph is rendered
2567  * in non-monochrome modes.
2568  *
2569  * FT_LOAD_TARGET_LCD ::
2570  * A variant of @FT_LOAD_TARGET_NORMAL optimized for horizontally
2571  * decimated LCD displays.
2572  *
2573  * FT_LOAD_TARGET_LCD_V ::
2574  * A variant of @FT_LOAD_TARGET_NORMAL optimized for vertically
2575  * decimated LCD displays.
2576  *
2577  * @note:
2578  * You should use only _one_ of the FT_LOAD_TARGET_XXX values in your
2579  * `load_flags'. They can't be ORed.
2580  *
2581  * If @FT_LOAD_RENDER is also set, the glyph is rendered in the
2582  * corresponding mode (i.e., the mode which matches the used algorithm
2583  * best) unless @FT_LOAD_MONOCHROME is set.
2584  *
2585  * You can use a hinting algorithm that doesn't correspond to the same
2586  * rendering mode. As an example, it is possible to use the `light'
2587  * hinting algorithm and have the results rendered in horizontal LCD
2588  * pixel mode, with code like
2589  *
2590  * {
2591  * FT_Load_Glyph( face, glyph_index,
2592  * load_flags | FT_LOAD_TARGET_LIGHT );
2593  *
2594  * FT_Render_Glyph( face->glyph, FT_RENDER_MODE_LCD );
2595  * }
2596  *
2597  */
2598 #define FT_LOAD_TARGET_( x ) ( (FT_Int32)( (x) & 15 ) << 16 )
2599 
2600 #define FT_LOAD_TARGET_NORMAL FT_LOAD_TARGET_( FT_RENDER_MODE_NORMAL )
2601 #define FT_LOAD_TARGET_LIGHT FT_LOAD_TARGET_( FT_RENDER_MODE_LIGHT )
2602 #define FT_LOAD_TARGET_MONO FT_LOAD_TARGET_( FT_RENDER_MODE_MONO )
2603 #define FT_LOAD_TARGET_LCD FT_LOAD_TARGET_( FT_RENDER_MODE_LCD )
2604 #define FT_LOAD_TARGET_LCD_V FT_LOAD_TARGET_( FT_RENDER_MODE_LCD_V )
2605 
2606 
2607  /**************************************************************************
2608  *
2609  * @macro:
2610  * FT_LOAD_TARGET_MODE
2611  *
2612  * @description:
2613  * Return the @FT_Render_Mode corresponding to a given
2614  * @FT_LOAD_TARGET_XXX value.
2615  *
2616  */
2617 #define FT_LOAD_TARGET_MODE( x ) ( (FT_Render_Mode)( ( (x) >> 16 ) & 15 ) )
2618 
2619 
2620  /*************************************************************************/
2621  /* */
2622  /* <Function> */
2623  /* FT_Set_Transform */
2624  /* */
2625  /* <Description> */
2626  /* A function used to set the transformation that is applied to glyph */
2627  /* images when they are loaded into a glyph slot through */
2628  /* @FT_Load_Glyph. */
2629  /* */
2630  /* <InOut> */
2631  /* face :: A handle to the source face object. */
2632  /* */
2633  /* <Input> */
2634  /* matrix :: A pointer to the transformation's 2x2 matrix. Use~0 for */
2635  /* the identity matrix. */
2636  /* delta :: A pointer to the translation vector. Use~0 for the null */
2637  /* vector. */
2638  /* */
2639  /* <Note> */
2640  /* The transformation is only applied to scalable image formats after */
2641  /* the glyph has been loaded. It means that hinting is unaltered by */
2642  /* the transformation and is performed on the character size given in */
2643  /* the last call to @FT_Set_Char_Size or @FT_Set_Pixel_Sizes. */
2644  /* */
2645  /* Note that this also transforms the `face.glyph.advance' field, but */
2646  /* *not* the values in `face.glyph.metrics'. */
2647  /* */
2648  FT_EXPORT( void )
2649  FT_Set_Transform( FT_Face face,
2650  FT_Matrix* matrix,
2651  FT_Vector* delta );
2652 
2653 
2654  /*************************************************************************/
2655  /* */
2656  /* <Enum> */
2657  /* FT_Render_Mode */
2658  /* */
2659  /* <Description> */
2660  /* An enumeration type that lists the render modes supported by */
2661  /* FreeType~2. Each mode corresponds to a specific type of scanline */
2662  /* conversion performed on the outline. */
2663  /* */
2664  /* For bitmap fonts and embedded bitmaps the `bitmap->pixel_mode' */
2665  /* field in the @FT_GlyphSlotRec structure gives the format of the */
2666  /* returned bitmap. */
2667  /* */
2668  /* All modes except @FT_RENDER_MODE_MONO use 256 levels of opacity. */
2669  /* */
2670  /* <Values> */
2671  /* FT_RENDER_MODE_NORMAL :: */
2672  /* This is the default render mode; it corresponds to 8-bit */
2673  /* anti-aliased bitmaps. */
2674  /* */
2675  /* FT_RENDER_MODE_LIGHT :: */
2676  /* This is equivalent to @FT_RENDER_MODE_NORMAL. It is only */
2677  /* defined as a separate value because render modes are also used */
2678  /* indirectly to define hinting algorithm selectors. See */
2679  /* @FT_LOAD_TARGET_XXX for details. */
2680  /* */
2681  /* FT_RENDER_MODE_MONO :: */
2682  /* This mode corresponds to 1-bit bitmaps (with 2~levels of */
2683  /* opacity). */
2684  /* */
2685  /* FT_RENDER_MODE_LCD :: */
2686  /* This mode corresponds to horizontal RGB and BGR sub-pixel */
2687  /* displays like LCD screens. It produces 8-bit bitmaps that are */
2688  /* 3~times the width of the original glyph outline in pixels, and */
2689  /* which use the @FT_PIXEL_MODE_LCD mode. */
2690  /* */
2691  /* FT_RENDER_MODE_LCD_V :: */
2692  /* This mode corresponds to vertical RGB and BGR sub-pixel displays */
2693  /* (like PDA screens, rotated LCD displays, etc.). It produces */
2694  /* 8-bit bitmaps that are 3~times the height of the original */
2695  /* glyph outline in pixels and use the @FT_PIXEL_MODE_LCD_V mode. */
2696  /* */
2697  /* <Note> */
2698  /* The LCD-optimized glyph bitmaps produced by FT_Render_Glyph can be */
2699  /* filtered to reduce color-fringes by using @FT_Library_SetLcdFilter */
2700  /* (not active in the default builds). It is up to the caller to */
2701  /* either call @FT_Library_SetLcdFilter (if available) or do the */
2702  /* filtering itself. */
2703  /* */
2704  /* The selected render mode only affects vector glyphs of a font. */
2705  /* Embedded bitmaps often have a different pixel mode like */
2706  /* @FT_PIXEL_MODE_MONO. You can use @FT_Bitmap_Convert to transform */
2707  /* them into 8-bit pixmaps. */
2708  /* */
2709  typedef enum FT_Render_Mode_
2710  {
2711  FT_RENDER_MODE_NORMAL = 0,
2712  FT_RENDER_MODE_LIGHT,
2713  FT_RENDER_MODE_MONO,
2714  FT_RENDER_MODE_LCD,
2715  FT_RENDER_MODE_LCD_V,
2716 
2717  FT_RENDER_MODE_MAX
2718 
2719  } FT_Render_Mode;
2720 
2721 
2722  /*************************************************************************/
2723  /* */
2724  /* <Enum> */
2725  /* ft_render_mode_xxx */
2726  /* */
2727  /* <Description> */
2728  /* These constants are deprecated. Use the corresponding */
2729  /* @FT_Render_Mode values instead. */
2730  /* */
2731  /* <Values> */
2732  /* ft_render_mode_normal :: see @FT_RENDER_MODE_NORMAL */
2733  /* ft_render_mode_mono :: see @FT_RENDER_MODE_MONO */
2734  /* */
2735 #define ft_render_mode_normal FT_RENDER_MODE_NORMAL
2736 #define ft_render_mode_mono FT_RENDER_MODE_MONO
2737 
2738 
2739  /*************************************************************************/
2740  /* */
2741  /* <Function> */
2742  /* FT_Render_Glyph */
2743  /* */
2744  /* <Description> */
2745  /* Convert a given glyph image to a bitmap. It does so by inspecting */
2746  /* the glyph image format, finding the relevant renderer, and */
2747  /* invoking it. */
2748  /* */
2749  /* <InOut> */
2750  /* slot :: A handle to the glyph slot containing the image to */
2751  /* convert. */
2752  /* */
2753  /* <Input> */
2754  /* render_mode :: This is the render mode used to render the glyph */
2755  /* image into a bitmap. See @FT_Render_Mode for a */
2756  /* list of possible values. */
2757  /* */
2758  /* <Return> */
2759  /* FreeType error code. 0~means success. */
2760  /* */
2761  FT_EXPORT( FT_Error )
2762  FT_Render_Glyph( FT_GlyphSlot slot,
2763  FT_Render_Mode render_mode );
2764 
2765 
2766  /*************************************************************************/
2767  /* */
2768  /* <Enum> */
2769  /* FT_Kerning_Mode */
2770  /* */
2771  /* <Description> */
2772  /* An enumeration used to specify which kerning values to return in */
2773  /* @FT_Get_Kerning. */
2774  /* */
2775  /* <Values> */
2776  /* FT_KERNING_DEFAULT :: Return scaled and grid-fitted kerning */
2777  /* distances (value is~0). */
2778  /* */
2779  /* FT_KERNING_UNFITTED :: Return scaled but un-grid-fitted kerning */
2780  /* distances. */
2781  /* */
2782  /* FT_KERNING_UNSCALED :: Return the kerning vector in original font */
2783  /* units. */
2784  /* */
2785  typedef enum FT_Kerning_Mode_
2786  {
2787  FT_KERNING_DEFAULT = 0,
2788  FT_KERNING_UNFITTED,
2789  FT_KERNING_UNSCALED
2790 
2791  } FT_Kerning_Mode;
2792 
2793 
2794  /*************************************************************************/
2795  /* */
2796  /* <Const> */
2797  /* ft_kerning_default */
2798  /* */
2799  /* <Description> */
2800  /* This constant is deprecated. Please use @FT_KERNING_DEFAULT */
2801  /* instead. */
2802  /* */
2803 #define ft_kerning_default FT_KERNING_DEFAULT
2804 
2805 
2806  /*************************************************************************/
2807  /* */
2808  /* <Const> */
2809  /* ft_kerning_unfitted */
2810  /* */
2811  /* <Description> */
2812  /* This constant is deprecated. Please use @FT_KERNING_UNFITTED */
2813  /* instead. */
2814  /* */
2815 #define ft_kerning_unfitted FT_KERNING_UNFITTED
2816 
2817 
2818  /*************************************************************************/
2819  /* */
2820  /* <Const> */
2821  /* ft_kerning_unscaled */
2822  /* */
2823  /* <Description> */
2824  /* This constant is deprecated. Please use @FT_KERNING_UNSCALED */
2825  /* instead. */
2826  /* */
2827 #define ft_kerning_unscaled FT_KERNING_UNSCALED
2828 
2829 
2830  /*************************************************************************/
2831  /* */
2832  /* <Function> */
2833  /* FT_Get_Kerning */
2834  /* */
2835  /* <Description> */
2836  /* Return the kerning vector between two glyphs of a same face. */
2837  /* */
2838  /* <Input> */
2839  /* face :: A handle to a source face object. */
2840  /* */
2841  /* left_glyph :: The index of the left glyph in the kern pair. */
2842  /* */
2843  /* right_glyph :: The index of the right glyph in the kern pair. */
2844  /* */
2845  /* kern_mode :: See @FT_Kerning_Mode for more information. */
2846  /* Determines the scale and dimension of the returned */
2847  /* kerning vector. */
2848  /* */
2849  /* <Output> */
2850  /* akerning :: The kerning vector. This is either in font units */
2851  /* or in pixels (26.6 format) for scalable formats, */
2852  /* and in pixels for fixed-sizes formats. */
2853  /* */
2854  /* <Return> */
2855  /* FreeType error code. 0~means success. */
2856  /* */
2857  /* <Note> */
2858  /* Only horizontal layouts (left-to-right & right-to-left) are */
2859  /* supported by this method. Other layouts, or more sophisticated */
2860  /* kernings, are out of the scope of this API function -- they can be */
2861  /* implemented through format-specific interfaces. */
2862  /* */
2863  FT_EXPORT( FT_Error )
2864  FT_Get_Kerning( FT_Face face,
2865  FT_UInt left_glyph,
2866  FT_UInt right_glyph,
2867  FT_UInt kern_mode,
2868  FT_Vector *akerning );
2869 
2870 
2871  /*************************************************************************/
2872  /* */
2873  /* <Function> */
2874  /* FT_Get_Track_Kerning */
2875  /* */
2876  /* <Description> */
2877  /* Return the track kerning for a given face object at a given size. */
2878  /* */
2879  /* <Input> */
2880  /* face :: A handle to a source face object. */
2881  /* */
2882  /* point_size :: The point size in 16.16 fractional points. */
2883  /* */
2884  /* degree :: The degree of tightness. Increasingly negative */
2885  /* values represent tighter track kerning, while */
2886  /* increasingly positive values represent looser track */
2887  /* kerning. Value zero means no track kerning. */
2888  /* */
2889  /* <Output> */
2890  /* akerning :: The kerning in 16.16 fractional points, to be */
2891  /* uniformly applied between all glyphs. */
2892  /* */
2893  /* <Return> */
2894  /* FreeType error code. 0~means success. */
2895  /* */
2896  /* <Note> */
2897  /* Currently, only the Type~1 font driver supports track kerning, */
2898  /* using data from AFM files (if attached with @FT_Attach_File or */
2899  /* @FT_Attach_Stream). */
2900  /* */
2901  /* Only very few AFM files come with track kerning data; please refer */
2902  /* to the Adobe's AFM specification for more details. */
2903  /* */
2904  FT_EXPORT( FT_Error )
2905  FT_Get_Track_Kerning( FT_Face face,
2906  FT_Fixed point_size,
2907  FT_Int degree,
2908  FT_Fixed* akerning );
2909 
2910 
2911  /*************************************************************************/
2912  /* */
2913  /* <Function> */
2914  /* FT_Get_Glyph_Name */
2915  /* */
2916  /* <Description> */
2917  /* Retrieve the ASCII name of a given glyph in a face. This only */
2918  /* works for those faces where @FT_HAS_GLYPH_NAMES(face) returns~1. */
2919  /* */
2920  /* <Input> */
2921  /* face :: A handle to a source face object. */
2922  /* */
2923  /* glyph_index :: The glyph index. */
2924  /* */
2925  /* buffer_max :: The maximal number of bytes available in the */
2926  /* buffer. */
2927  /* */
2928  /* <Output> */
2929  /* buffer :: A pointer to a target buffer where the name is */
2930  /* copied to. */
2931  /* */
2932  /* <Return> */
2933  /* FreeType error code. 0~means success. */
2934  /* */
2935  /* <Note> */
2936  /* An error is returned if the face doesn't provide glyph names or if */
2937  /* the glyph index is invalid. In all cases of failure, the first */
2938  /* byte of `buffer' is set to~0 to indicate an empty name. */
2939  /* */
2940  /* The glyph name is truncated to fit within the buffer if it is too */
2941  /* long. The returned string is always zero-terminated. */
2942  /* */
2943  /* Be aware that FreeType reorders glyph indices internally so that */
2944  /* glyph index~0 always corresponds to the `missing glyph' (called */
2945  /* `.notdef'). */
2946  /* */
2947  /* This function is not compiled within the library if the config */
2948  /* macro `FT_CONFIG_OPTION_NO_GLYPH_NAMES' is defined in */
2949  /* `include/freetype/config/ftoptions.h'. */
2950  /* */
2951  FT_EXPORT( FT_Error )
2952  FT_Get_Glyph_Name( FT_Face face,
2953  FT_UInt glyph_index,
2954  FT_Pointer buffer,
2955  FT_UInt buffer_max );
2956 
2957 
2958  /*************************************************************************/
2959  /* */
2960  /* <Function> */
2961  /* FT_Get_Postscript_Name */
2962  /* */
2963  /* <Description> */
2964  /* Retrieve the ASCII PostScript name of a given face, if available. */
2965  /* This only works with PostScript and TrueType fonts. */
2966  /* */
2967  /* <Input> */
2968  /* face :: A handle to the source face object. */
2969  /* */
2970  /* <Return> */
2971  /* A pointer to the face's PostScript name. NULL if unavailable. */
2972  /* */
2973  /* <Note> */
2974  /* The returned pointer is owned by the face and is destroyed with */
2975  /* it. */
2976  /* */
2977  FT_EXPORT( const char* )
2978  FT_Get_Postscript_Name( FT_Face face );
2979 
2980 
2981  /*************************************************************************/
2982  /* */
2983  /* <Function> */
2984  /* FT_Select_Charmap */
2985  /* */
2986  /* <Description> */
2987  /* Select a given charmap by its encoding tag (as listed in */
2988  /* `freetype.h'). */
2989  /* */
2990  /* <InOut> */
2991  /* face :: A handle to the source face object. */
2992  /* */
2993  /* <Input> */
2994  /* encoding :: A handle to the selected encoding. */
2995  /* */
2996  /* <Return> */
2997  /* FreeType error code. 0~means success. */
2998  /* */
2999  /* <Note> */
3000  /* This function returns an error if no charmap in the face */
3001  /* corresponds to the encoding queried here. */
3002  /* */
3003  /* Because many fonts contain more than a single cmap for Unicode */
3004  /* encoding, this function has some special code to select the one */
3005  /* which covers Unicode best (`best' in the sense that a UCS-4 cmap */
3006  /* is preferred to a UCS-2 cmap). It is thus preferable to */
3007  /* @FT_Set_Charmap in this case. */
3008  /* */
3009  FT_EXPORT( FT_Error )
3010  FT_Select_Charmap( FT_Face face,
3011  FT_Encoding encoding );
3012 
3013 
3014  /*************************************************************************/
3015  /* */
3016  /* <Function> */
3017  /* FT_Set_Charmap */
3018  /* */
3019  /* <Description> */
3020  /* Select a given charmap for character code to glyph index mapping. */
3021  /* */
3022  /* <InOut> */
3023  /* face :: A handle to the source face object. */
3024  /* */
3025  /* <Input> */
3026  /* charmap :: A handle to the selected charmap. */
3027  /* */
3028  /* <Return> */
3029  /* FreeType error code. 0~means success. */
3030  /* */
3031  /* <Note> */
3032  /* This function returns an error if the charmap is not part of */
3033  /* the face (i.e., if it is not listed in the `face->charmaps' */
3034  /* table). */
3035  /* */
3036  /* It also fails if a type~14 charmap is selected. */
3037  /* */
3038  FT_EXPORT( FT_Error )
3039  FT_Set_Charmap( FT_Face face,
3040  FT_CharMap charmap );
3041 
3042 
3043  /*************************************************************************
3044  *
3045  * @function:
3046  * FT_Get_Charmap_Index
3047  *
3048  * @description:
3049  * Retrieve index of a given charmap.
3050  *
3051  * @input:
3052  * charmap ::
3053  * A handle to a charmap.
3054  *
3055  * @return:
3056  * The index into the array of character maps within the face to which
3057  * `charmap' belongs. If an error occurs, -1 is returned.
3058  *
3059  */
3060  FT_EXPORT( FT_Int )
3061  FT_Get_Charmap_Index( FT_CharMap charmap );
3062 
3063 
3064  /*************************************************************************/
3065  /* */
3066  /* <Function> */
3067  /* FT_Get_Char_Index */
3068  /* */
3069  /* <Description> */
3070  /* Return the glyph index of a given character code. This function */
3071  /* uses a charmap object to do the mapping. */
3072  /* */
3073  /* <Input> */
3074  /* face :: A handle to the source face object. */
3075  /* */
3076  /* charcode :: The character code. */
3077  /* */
3078  /* <Return> */
3079  /* The glyph index. 0~means `undefined character code'. */
3080  /* */
3081  /* <Note> */
3082  /* If you use FreeType to manipulate the contents of font files */
3083  /* directly, be aware that the glyph index returned by this function */
3084  /* doesn't always correspond to the internal indices used within */
3085  /* the file. This is done to ensure that value~0 always corresponds */
3086  /* to the `missing glyph'. */
3087  /* */
3088  FT_EXPORT( FT_UInt )
3089  FT_Get_Char_Index( FT_Face face,
3090  FT_ULong charcode );
3091 
3092 
3093  /*************************************************************************/
3094  /* */
3095  /* <Function> */
3096  /* FT_Get_First_Char */
3097  /* */
3098  /* <Description> */
3099  /* This function is used to return the first character code in the */
3100  /* current charmap of a given face. It also returns the */
3101  /* corresponding glyph index. */
3102  /* */
3103  /* <Input> */
3104  /* face :: A handle to the source face object. */
3105  /* */
3106  /* <Output> */
3107  /* agindex :: Glyph index of first character code. 0~if charmap is */
3108  /* empty. */
3109  /* */
3110  /* <Return> */
3111  /* The charmap's first character code. */
3112  /* */
3113  /* <Note> */
3114  /* You should use this function with @FT_Get_Next_Char to be able to */
3115  /* parse all character codes available in a given charmap. The code */
3116  /* should look like this: */
3117  /* */
3118  /* { */
3119  /* FT_ULong charcode; */
3120  /* FT_UInt gindex; */
3121  /* */
3122  /* */
3123  /* charcode = FT_Get_First_Char( face, &gindex ); */
3124  /* while ( gindex != 0 ) */
3125  /* { */
3126  /* ... do something with (charcode,gindex) pair ... */
3127  /* */
3128  /* charcode = FT_Get_Next_Char( face, charcode, &gindex ); */
3129  /* } */
3130  /* } */
3131  /* */
3132  /* Note that `*agindex' is set to~0 if the charmap is empty. The */
3133  /* result itself can be~0 in two cases: if the charmap is empty or */
3134  /* if the value~0 is the first valid character code. */
3135  /* */
3136  FT_EXPORT( FT_ULong )
3137  FT_Get_First_Char( FT_Face face,
3138  FT_UInt *agindex );
3139 
3140 
3141  /*************************************************************************/
3142  /* */
3143  /* <Function> */
3144  /* FT_Get_Next_Char */
3145  /* */
3146  /* <Description> */
3147  /* This function is used to return the next character code in the */
3148  /* current charmap of a given face following the value `char_code', */
3149  /* as well as the corresponding glyph index. */
3150  /* */
3151  /* <Input> */
3152  /* face :: A handle to the source face object. */
3153  /* char_code :: The starting character code. */
3154  /* */
3155  /* <Output> */
3156  /* agindex :: Glyph index of next character code. 0~if charmap */
3157  /* is empty. */
3158  /* */
3159  /* <Return> */
3160  /* The charmap's next character code. */
3161  /* */
3162  /* <Note> */
3163  /* You should use this function with @FT_Get_First_Char to walk */
3164  /* over all character codes available in a given charmap. See the */
3165  /* note for this function for a simple code example. */
3166  /* */
3167  /* Note that `*agindex' is set to~0 when there are no more codes in */
3168  /* the charmap. */
3169  /* */
3170  FT_EXPORT( FT_ULong )
3171  FT_Get_Next_Char( FT_Face face,
3172  FT_ULong char_code,
3173  FT_UInt *agindex );
3174 
3175 
3176  /*************************************************************************/
3177  /* */
3178  /* <Function> */
3179  /* FT_Get_Name_Index */
3180  /* */
3181  /* <Description> */
3182  /* Return the glyph index of a given glyph name. This function uses */
3183  /* driver specific objects to do the translation. */
3184  /* */
3185  /* <Input> */
3186  /* face :: A handle to the source face object. */
3187  /* */
3188  /* glyph_name :: The glyph name. */
3189  /* */
3190  /* <Return> */
3191  /* The glyph index. 0~means `undefined character code'. */
3192  /* */
3193  FT_EXPORT( FT_UInt )
3194  FT_Get_Name_Index( FT_Face face,
3195  FT_String* glyph_name );
3196 
3197 
3198  /*************************************************************************
3199  *
3200  * @macro:
3201  * FT_SUBGLYPH_FLAG_XXX
3202  *
3203  * @description:
3204  * A list of constants used to describe subglyphs. Please refer to the
3205  * TrueType specification for the meaning of the various flags.
3206  *
3207  * @values:
3208  * FT_SUBGLYPH_FLAG_ARGS_ARE_WORDS ::
3209  * FT_SUBGLYPH_FLAG_ARGS_ARE_XY_VALUES ::
3210  * FT_SUBGLYPH_FLAG_ROUND_XY_TO_GRID ::
3211  * FT_SUBGLYPH_FLAG_SCALE ::
3212  * FT_SUBGLYPH_FLAG_XY_SCALE ::
3213  * FT_SUBGLYPH_FLAG_2X2 ::
3214  * FT_SUBGLYPH_FLAG_USE_MY_METRICS ::
3215  *
3216  */
3217 #define FT_SUBGLYPH_FLAG_ARGS_ARE_WORDS 1
3218 #define FT_SUBGLYPH_FLAG_ARGS_ARE_XY_VALUES 2
3219 #define FT_SUBGLYPH_FLAG_ROUND_XY_TO_GRID 4
3220 #define FT_SUBGLYPH_FLAG_SCALE 8
3221 #define FT_SUBGLYPH_FLAG_XY_SCALE 0x40
3222 #define FT_SUBGLYPH_FLAG_2X2 0x80
3223 #define FT_SUBGLYPH_FLAG_USE_MY_METRICS 0x200
3224 
3225 
3226  /*************************************************************************
3227  *
3228  * @func:
3229  * FT_Get_SubGlyph_Info
3230  *
3231  * @description:
3232  * Retrieve a description of a given subglyph. Only use it if
3233  * `glyph->format' is @FT_GLYPH_FORMAT_COMPOSITE; an error is
3234  * returned otherwise.
3235  *
3236  * @input:
3237  * glyph ::
3238  * The source glyph slot.
3239  *
3240  * sub_index ::
3241  * The index of the subglyph. Must be less than
3242  * `glyph->num_subglyphs'.
3243  *
3244  * @output:
3245  * p_index ::
3246  * The glyph index of the subglyph.
3247  *
3248  * p_flags ::
3249  * The subglyph flags, see @FT_SUBGLYPH_FLAG_XXX.
3250  *
3251  * p_arg1 ::
3252  * The subglyph's first argument (if any).
3253  *
3254  * p_arg2 ::
3255  * The subglyph's second argument (if any).
3256  *
3257  * p_transform ::
3258  * The subglyph transformation (if any).
3259  *
3260  * @return:
3261  * FreeType error code. 0~means success.
3262  *
3263  * @note:
3264  * The values of `*p_arg1', `*p_arg2', and `*p_transform' must be
3265  * interpreted depending on the flags returned in `*p_flags'. See the
3266  * TrueType specification for details.
3267  *
3268  */
3269  FT_EXPORT( FT_Error )
3270  FT_Get_SubGlyph_Info( FT_GlyphSlot glyph,
3271  FT_UInt sub_index,
3272  FT_Int *p_index,
3273  FT_UInt *p_flags,
3274  FT_Int *p_arg1,
3275  FT_Int *p_arg2,
3276  FT_Matrix *p_transform );
3277 
3278 
3279  /*************************************************************************/
3280  /* */
3281  /* <Enum> */
3282  /* FT_FSTYPE_XXX */
3283  /* */
3284  /* <Description> */
3285  /* A list of bit flags used in the `fsType' field of the OS/2 table */
3286  /* in a TrueType or OpenType font and the `FSType' entry in a */
3287  /* PostScript font. These bit flags are returned by */
3288  /* @FT_Get_FSType_Flags; they inform client applications of embedding */
3289  /* and subsetting restrictions associated with a font. */
3290  /* */
3291  /* See http://www.adobe.com/devnet/acrobat/pdfs/FontPolicies.pdf for */
3292  /* more details. */
3293  /* */
3294  /* <Values> */
3295  /* FT_FSTYPE_INSTALLABLE_EMBEDDING :: */
3296  /* Fonts with no fsType bit set may be embedded and permanently */
3297  /* installed on the remote system by an application. */
3298  /* */
3299  /* FT_FSTYPE_RESTRICTED_LICENSE_EMBEDDING :: */
3300  /* Fonts that have only this bit set must not be modified, embedded */
3301  /* or exchanged in any manner without first obtaining permission of */
3302  /* the font software copyright owner. */
3303  /* */
3304  /* FT_FSTYPE_PREVIEW_AND_PRINT_EMBEDDING :: */
3305  /* If this bit is set, the font may be embedded and temporarily */
3306  /* loaded on the remote system. Documents containing Preview & */
3307  /* Print fonts must be opened `read-only'; no edits can be applied */
3308  /* to the document. */
3309  /* */
3310  /* FT_FSTYPE_EDITABLE_EMBEDDING :: */
3311  /* If this bit is set, the font may be embedded but must only be */
3312  /* installed temporarily on other systems. In contrast to Preview */
3313  /* & Print fonts, documents containing editable fonts may be opened */
3314  /* for reading, editing is permitted, and changes may be saved. */
3315  /* */
3316  /* FT_FSTYPE_NO_SUBSETTING :: */
3317  /* If this bit is set, the font may not be subsetted prior to */
3318  /* embedding. */
3319  /* */
3320  /* FT_FSTYPE_BITMAP_EMBEDDING_ONLY :: */
3321  /* If this bit is set, only bitmaps contained in the font may be */
3322  /* embedded; no outline data may be embedded. If there are no */
3323  /* bitmaps available in the font, then the font is unembeddable. */
3324  /* */
3325  /* <Note> */
3326  /* While the fsType flags can indicate that a font may be embedded, a */
3327  /* license with the font vendor may be separately required to use the */
3328  /* font in this way. */
3329  /* */
3330 #define FT_FSTYPE_INSTALLABLE_EMBEDDING 0x0000
3331 #define FT_FSTYPE_RESTRICTED_LICENSE_EMBEDDING 0x0002
3332 #define FT_FSTYPE_PREVIEW_AND_PRINT_EMBEDDING 0x0004
3333 #define FT_FSTYPE_EDITABLE_EMBEDDING 0x0008
3334 #define FT_FSTYPE_NO_SUBSETTING 0x0100
3335 #define FT_FSTYPE_BITMAP_EMBEDDING_ONLY 0x0200
3336 
3337 
3338  /*************************************************************************/
3339  /* */
3340  /* <Function> */
3341  /* FT_Get_FSType_Flags */
3342  /* */
3343  /* <Description> */
3344  /* Return the fsType flags for a font. */
3345  /* */
3346  /* <Input> */
3347  /* face :: A handle to the source face object. */
3348  /* */
3349  /* <Return> */
3350  /* The fsType flags, @FT_FSTYPE_XXX. */
3351  /* */
3352  /* <Note> */
3353  /* Use this function rather than directly reading the `fs_type' field */
3354  /* in the @PS_FontInfoRec structure which is only guaranteed to */
3355  /* return the correct results for Type~1 fonts. */
3356  /* */
3357  /* <Since> */
3358  /* 2.3.8 */
3359  /* */
3360  FT_EXPORT( FT_UShort )
3361  FT_Get_FSType_Flags( FT_Face face );
3362 
3363 
3364  /*************************************************************************/
3365  /* */
3366  /* <Section> */
3367  /* glyph_variants */
3368  /* */
3369  /* <Title> */
3370  /* Glyph Variants */
3371  /* */
3372  /* <Abstract> */
3373  /* The FreeType~2 interface to Unicode Ideographic Variation */
3374  /* Sequences (IVS), using the SFNT cmap format~14. */
3375  /* */
3376  /* <Description> */
3377  /* Many CJK characters have variant forms. They are a sort of grey */
3378  /* area somewhere between being totally irrelevant and semantically */
3379  /* distinct; for this reason, the Unicode consortium decided to */
3380  /* introduce Ideographic Variation Sequences (IVS), consisting of a */
3381  /* Unicode base character and one of 240 variant selectors */
3382  /* (U+E0100-U+E01EF), instead of further extending the already huge */
3383  /* code range for CJK characters. */
3384  /* */
3385  /* An IVS is registered and unique; for further details please refer */
3386  /* to Unicode Technical Report #37, the Ideographic Variation */
3387  /* Database. To date (October 2007), the character with the most */
3388  /* variants is U+908A, having 8~such IVS. */
3389  /* */
3390  /* Adobe and MS decided to support IVS with a new cmap subtable */
3391  /* (format~14). It is an odd subtable because it is not a mapping of */
3392  /* input code points to glyphs, but contains lists of all variants */
3393  /* supported by the font. */
3394  /* */
3395  /* A variant may be either `default' or `non-default'. A default */
3396  /* variant is the one you will get for that code point if you look it */
3397  /* up in the standard Unicode cmap. A non-default variant is a */
3398  /* different glyph. */
3399  /* */
3400  /*************************************************************************/
3401 
3402 
3403  /*************************************************************************/
3404  /* */
3405  /* <Function> */
3406  /* FT_Face_GetCharVariantIndex */
3407  /* */
3408  /* <Description> */
3409  /* Return the glyph index of a given character code as modified by */
3410  /* the variation selector. */
3411  /* */
3412  /* <Input> */
3413  /* face :: */
3414  /* A handle to the source face object. */
3415  /* */
3416  /* charcode :: */
3417  /* The character code point in Unicode. */
3418  /* */
3419  /* variantSelector :: */
3420  /* The Unicode code point of the variation selector. */
3421  /* */
3422  /* <Return> */
3423  /* The glyph index. 0~means either `undefined character code', or */
3424  /* `undefined selector code', or `no variation selector cmap */
3425  /* subtable', or `current CharMap is not Unicode'. */
3426  /* */
3427  /* <Note> */
3428  /* If you use FreeType to manipulate the contents of font files */
3429  /* directly, be aware that the glyph index returned by this function */
3430  /* doesn't always correspond to the internal indices used within */
3431  /* the file. This is done to ensure that value~0 always corresponds */
3432  /* to the `missing glyph'. */
3433  /* */
3434  /* This function is only meaningful if */
3435  /* a) the font has a variation selector cmap sub table, */
3436  /* and */
3437  /* b) the current charmap has a Unicode encoding. */
3438  /* */
3439  /* <Since> */
3440  /* 2.3.6 */
3441  /* */
3442  FT_EXPORT( FT_UInt )
3443  FT_Face_GetCharVariantIndex( FT_Face face,
3444  FT_ULong charcode,
3445  FT_ULong variantSelector );
3446 
3447 
3448  /*************************************************************************/
3449  /* */
3450  /* <Function> */
3451  /* FT_Face_GetCharVariantIsDefault */
3452  /* */
3453  /* <Description> */
3454  /* Check whether this variant of this Unicode character is the one to */
3455  /* be found in the `cmap'. */
3456  /* */
3457  /* <Input> */
3458  /* face :: */
3459  /* A handle to the source face object. */
3460  /* */
3461  /* charcode :: */
3462  /* The character codepoint in Unicode. */
3463  /* */
3464  /* variantSelector :: */
3465  /* The Unicode codepoint of the variation selector. */
3466  /* */
3467  /* <Return> */
3468  /* 1~if found in the standard (Unicode) cmap, 0~if found in the */
3469  /* variation selector cmap, or -1 if it is not a variant. */
3470  /* */
3471  /* <Note> */
3472  /* This function is only meaningful if the font has a variation */
3473  /* selector cmap subtable. */
3474  /* */
3475  /* <Since> */
3476  /* 2.3.6 */
3477  /* */
3478  FT_EXPORT( FT_Int )
3479  FT_Face_GetCharVariantIsDefault( FT_Face face,
3480  FT_ULong charcode,
3481  FT_ULong variantSelector );
3482 
3483 
3484  /*************************************************************************/
3485  /* */
3486  /* <Function> */
3487  /* FT_Face_GetVariantSelectors */
3488  /* */
3489  /* <Description> */
3490  /* Return a zero-terminated list of Unicode variant selectors found */
3491  /* in the font. */
3492  /* */
3493  /* <Input> */
3494  /* face :: */
3495  /* A handle to the source face object. */
3496  /* */
3497  /* <Return> */
3498  /* A pointer to an array of selector code points, or NULL if there is */
3499  /* no valid variant selector cmap subtable. */
3500  /* */
3501  /* <Note> */
3502  /* The last item in the array is~0; the array is owned by the */
3503  /* @FT_Face object but can be overwritten or released on the next */
3504  /* call to a FreeType function. */
3505  /* */
3506  /* <Since> */
3507  /* 2.3.6 */
3508  /* */
3509  FT_EXPORT( FT_UInt32* )
3510  FT_Face_GetVariantSelectors( FT_Face face );
3511 
3512 
3513  /*************************************************************************/
3514  /* */
3515  /* <Function> */
3516  /* FT_Face_GetVariantsOfChar */
3517  /* */
3518  /* <Description> */
3519  /* Return a zero-terminated list of Unicode variant selectors found */
3520  /* for the specified character code. */
3521  /* */
3522  /* <Input> */
3523  /* face :: */
3524  /* A handle to the source face object. */
3525  /* */
3526  /* charcode :: */
3527  /* The character codepoint in Unicode. */
3528  /* */
3529  /* <Return> */
3530  /* A pointer to an array of variant selector code points which are */
3531  /* active for the given character, or NULL if the corresponding list */
3532  /* is empty. */
3533  /* */
3534  /* <Note> */
3535  /* The last item in the array is~0; the array is owned by the */
3536  /* @FT_Face object but can be overwritten or released on the next */
3537  /* call to a FreeType function. */
3538  /* */
3539  /* <Since> */
3540  /* 2.3.6 */
3541  /* */
3542  FT_EXPORT( FT_UInt32* )
3543  FT_Face_GetVariantsOfChar( FT_Face face,
3544  FT_ULong charcode );
3545 
3546 
3547  /*************************************************************************/
3548  /* */
3549  /* <Function> */
3550  /* FT_Face_GetCharsOfVariant */
3551  /* */
3552  /* <Description> */
3553  /* Return a zero-terminated list of Unicode character codes found for */
3554  /* the specified variant selector. */
3555  /* */
3556  /* <Input> */
3557  /* face :: */
3558  /* A handle to the source face object. */
3559  /* */
3560  /* variantSelector :: */
3561  /* The variant selector code point in Unicode. */
3562  /* */
3563  /* <Return> */
3564  /* A list of all the code points which are specified by this selector */
3565  /* (both default and non-default codes are returned) or NULL if there */
3566  /* is no valid cmap or the variant selector is invalid. */
3567  /* */
3568  /* <Note> */
3569  /* The last item in the array is~0; the array is owned by the */
3570  /* @FT_Face object but can be overwritten or released on the next */
3571  /* call to a FreeType function. */
3572  /* */
3573  /* <Since> */
3574  /* 2.3.6 */
3575  /* */
3576  FT_EXPORT( FT_UInt32* )
3577  FT_Face_GetCharsOfVariant( FT_Face face,
3578  FT_ULong variantSelector );
3579 
3580 
3581  /*************************************************************************/
3582  /* */
3583  /* <Section> */
3584  /* computations */
3585  /* */
3586  /* <Title> */
3587  /* Computations */
3588  /* */
3589  /* <Abstract> */
3590  /* Crunching fixed numbers and vectors. */
3591  /* */
3592  /* <Description> */
3593  /* This section contains various functions used to perform */
3594  /* computations on 16.16 fixed-float numbers or 2d vectors. */
3595  /* */
3596  /* <Order> */
3597  /* FT_MulDiv */
3598  /* FT_MulFix */
3599  /* FT_DivFix */
3600  /* FT_RoundFix */
3601  /* FT_CeilFix */
3602  /* FT_FloorFix */
3603  /* FT_Vector_Transform */
3604  /* FT_Matrix_Multiply */
3605  /* FT_Matrix_Invert */
3606  /* */
3607  /*************************************************************************/
3608 
3609 
3610  /*************************************************************************/
3611  /* */
3612  /* <Function> */
3613  /* FT_MulDiv */
3614  /* */
3615  /* <Description> */
3616  /* A very simple function used to perform the computation `(a*b)/c' */
3617  /* with maximal accuracy (it uses a 64-bit intermediate integer */
3618  /* whenever necessary). */
3619  /* */
3620  /* This function isn't necessarily as fast as some processor specific */
3621  /* operations, but is at least completely portable. */
3622  /* */
3623  /* <Input> */
3624  /* a :: The first multiplier. */
3625  /* b :: The second multiplier. */
3626  /* c :: The divisor. */
3627  /* */
3628  /* <Return> */
3629  /* The result of `(a*b)/c'. This function never traps when trying to */
3630  /* divide by zero; it simply returns `MaxInt' or `MinInt' depending */
3631  /* on the signs of `a' and `b'. */
3632  /* */
3633  FT_EXPORT( FT_Long )
3634  FT_MulDiv( FT_Long a,
3635  FT_Long b,
3636  FT_Long c );
3637 
3638 
3639  /* */
3640 
3641  /* The following #if 0 ... #endif is for the documentation formatter, */
3642  /* hiding the internal `FT_MULFIX_INLINED' macro. */
3643 
3644 #if 0
3645  /*************************************************************************/
3646  /* */
3647  /* <Function> */
3648  /* FT_MulFix */
3649  /* */
3650  /* <Description> */
3651  /* A very simple function used to perform the computation */
3652  /* `(a*b)/0x10000' with maximal accuracy. Most of the time this is */
3653  /* used to multiply a given value by a 16.16 fixed float factor. */
3654  /* */
3655  /* <Input> */
3656  /* a :: The first multiplier. */
3657  /* b :: The second multiplier. Use a 16.16 factor here whenever */
3658  /* possible (see note below). */
3659  /* */
3660  /* <Return> */
3661  /* The result of `(a*b)/0x10000'. */
3662  /* */
3663  /* <Note> */
3664  /* This function has been optimized for the case where the absolute */
3665  /* value of `a' is less than 2048, and `b' is a 16.16 scaling factor. */
3666  /* As this happens mainly when scaling from notional units to */
3667  /* fractional pixels in FreeType, it resulted in noticeable speed */
3668  /* improvements between versions 2.x and 1.x. */
3669  /* */
3670  /* As a conclusion, always try to place a 16.16 factor as the */
3671  /* _second_ argument of this function; this can make a great */
3672  /* difference. */
3673  /* */
3674  FT_EXPORT( FT_Long )
3675  FT_MulFix( FT_Long a,
3676  FT_Long b );
3677 
3678  /* */
3679 #endif
3680 
3681 #ifdef FT_MULFIX_INLINED
3682 #define FT_MulFix( a, b ) FT_MULFIX_INLINED( a, b )
3683 #else
3684  FT_EXPORT( FT_Long )
3685  FT_MulFix( FT_Long a,
3686  FT_Long b );
3687 #endif
3688 
3689 
3690  /*************************************************************************/
3691  /* */
3692  /* <Function> */
3693  /* FT_DivFix */
3694  /* */
3695  /* <Description> */
3696  /* A very simple function used to perform the computation */
3697  /* `(a*0x10000)/b' with maximal accuracy. Most of the time, this is */
3698  /* used to divide a given value by a 16.16 fixed float factor. */
3699  /* */
3700  /* <Input> */
3701  /* a :: The first multiplier. */
3702  /* b :: The second multiplier. Use a 16.16 factor here whenever */
3703  /* possible (see note below). */
3704  /* */
3705  /* <Return> */
3706  /* The result of `(a*0x10000)/b'. */
3707  /* */
3708  /* <Note> */
3709  /* The optimization for FT_DivFix() is simple: If (a~<<~16) fits in */
3710  /* 32~bits, then the division is computed directly. Otherwise, we */
3711  /* use a specialized version of @FT_MulDiv. */
3712  /* */
3713  FT_EXPORT( FT_Long )
3714  FT_DivFix( FT_Long a,
3715  FT_Long b );
3716 
3717 
3718  /*************************************************************************/
3719  /* */
3720  /* <Function> */
3721  /* FT_RoundFix */
3722  /* */
3723  /* <Description> */
3724  /* A very simple function used to round a 16.16 fixed number. */
3725  /* */
3726  /* <Input> */
3727  /* a :: The number to be rounded. */
3728  /* */
3729  /* <Return> */
3730  /* The result of `(a + 0x8000) & -0x10000'. */
3731  /* */
3732  FT_EXPORT( FT_Fixed )
3733  FT_RoundFix( FT_Fixed a );
3734 
3735 
3736  /*************************************************************************/
3737  /* */
3738  /* <Function> */
3739  /* FT_CeilFix */
3740  /* */
3741  /* <Description> */
3742  /* A very simple function used to compute the ceiling function of a */
3743  /* 16.16 fixed number. */
3744  /* */
3745  /* <Input> */
3746  /* a :: The number for which the ceiling function is to be computed. */
3747  /* */
3748  /* <Return> */
3749  /* The result of `(a + 0x10000 - 1) & -0x10000'. */
3750  /* */
3751  FT_EXPORT( FT_Fixed )
3752  FT_CeilFix( FT_Fixed a );
3753 
3754 
3755  /*************************************************************************/
3756  /* */
3757  /* <Function> */
3758  /* FT_FloorFix */
3759  /* */
3760  /* <Description> */
3761  /* A very simple function used to compute the floor function of a */
3762  /* 16.16 fixed number. */
3763  /* */
3764  /* <Input> */
3765  /* a :: The number for which the floor function is to be computed. */
3766  /* */
3767  /* <Return> */
3768  /* The result of `a & -0x10000'. */
3769  /* */
3770  FT_EXPORT( FT_Fixed )
3771  FT_FloorFix( FT_Fixed a );
3772 
3773 
3774  /*************************************************************************/
3775  /* */
3776  /* <Function> */
3777  /* FT_Vector_Transform */
3778  /* */
3779  /* <Description> */
3780  /* Transform a single vector through a 2x2 matrix. */
3781  /* */
3782  /* <InOut> */
3783  /* vector :: The target vector to transform. */
3784  /* */
3785  /* <Input> */
3786  /* matrix :: A pointer to the source 2x2 matrix. */
3787  /* */
3788  /* <Note> */
3789  /* The result is undefined if either `vector' or `matrix' is invalid. */
3790  /* */
3791  FT_EXPORT( void )
3792  FT_Vector_Transform( FT_Vector* vec,
3793  const FT_Matrix* matrix );
3794 
3795 
3796  /*************************************************************************/
3797  /* */
3798  /* <Section> */
3799  /* version */
3800  /* */
3801  /* <Title> */
3802  /* FreeType Version */
3803  /* */
3804  /* <Abstract> */
3805  /* Functions and macros related to FreeType versions. */
3806  /* */
3807  /* <Description> */
3808  /* Note that those functions and macros are of limited use because */
3809  /* even a new release of FreeType with only documentation changes */
3810  /* increases the version number. */
3811  /* */
3812  /*************************************************************************/
3813 
3814 
3815  /*************************************************************************
3816  *
3817  * @enum:
3818  * FREETYPE_XXX
3819  *
3820  * @description:
3821  * These three macros identify the FreeType source code version.
3822  * Use @FT_Library_Version to access them at runtime.
3823  *
3824  * @values:
3825  * FREETYPE_MAJOR :: The major version number.
3826  * FREETYPE_MINOR :: The minor version number.
3827  * FREETYPE_PATCH :: The patch level.
3828  *
3829  * @note:
3830  * The version number of FreeType if built as a dynamic link library
3831  * with the `libtool' package is _not_ controlled by these three
3832  * macros.
3833  *
3834  */
3835 #define FREETYPE_MAJOR 2
3836 #define FREETYPE_MINOR 4
3837 #define FREETYPE_PATCH 9
3838 
3839 
3840  /*************************************************************************/
3841  /* */
3842  /* <Function> */
3843  /* FT_Library_Version */
3844  /* */
3845  /* <Description> */
3846  /* Return the version of the FreeType library being used. This is */
3847  /* useful when dynamically linking to the library, since one cannot */
3848  /* use the macros @FREETYPE_MAJOR, @FREETYPE_MINOR, and */
3849  /* @FREETYPE_PATCH. */
3850  /* */
3851  /* <Input> */
3852  /* library :: A source library handle. */
3853  /* */
3854  /* <Output> */
3855  /* amajor :: The major version number. */
3856  /* */
3857  /* aminor :: The minor version number. */
3858  /* */
3859  /* apatch :: The patch version number. */
3860  /* */
3861  /* <Note> */
3862  /* The reason why this function takes a `library' argument is because */
3863  /* certain programs implement library initialization in a custom way */
3864  /* that doesn't use @FT_Init_FreeType. */
3865  /* */
3866  /* In such cases, the library version might not be available before */
3867  /* the library object has been created. */
3868  /* */
3869  FT_EXPORT( void )
3870  FT_Library_Version( FT_Library library,
3871  FT_Int *amajor,
3872  FT_Int *aminor,
3873  FT_Int *apatch );
3874 
3875 
3876  /*************************************************************************/
3877  /* */
3878  /* <Function> */
3879  /* FT_Face_CheckTrueTypePatents */
3880  /* */
3881  /* <Description> */
3882  /* Parse all bytecode instructions of a TrueType font file to check */
3883  /* whether any of the patented opcodes are used. This is only useful */
3884  /* if you want to be able to use the unpatented hinter with */
3885  /* fonts that do *not* use these opcodes. */
3886  /* */
3887  /* Note that this function parses *all* glyph instructions in the */
3888  /* font file, which may be slow. */
3889  /* */
3890  /* <Input> */
3891  /* face :: A face handle. */
3892  /* */
3893  /* <Return> */
3894  /* 1~if this is a TrueType font that uses one of the patented */
3895  /* opcodes, 0~otherwise. */
3896  /* */
3897  /* <Note> */
3898  /* Since May 2010, TrueType hinting is no longer patented. */
3899  /* */
3900  /* <Since> */
3901  /* 2.3.5 */
3902  /* */
3903  FT_EXPORT( FT_Bool )
3904  FT_Face_CheckTrueTypePatents( FT_Face face );
3905 
3906 
3907  /*************************************************************************/
3908  /* */
3909  /* <Function> */
3910  /* FT_Face_SetUnpatentedHinting */
3911  /* */
3912  /* <Description> */
3913  /* Enable or disable the unpatented hinter for a given face. */
3914  /* Only enable it if you have determined that the face doesn't */
3915  /* use any patented opcodes (see @FT_Face_CheckTrueTypePatents). */
3916  /* */
3917  /* <Input> */
3918  /* face :: A face handle. */
3919  /* */
3920  /* value :: New boolean setting. */
3921  /* */
3922  /* <Return> */
3923  /* The old setting value. This will always be false if this is not */
3924  /* an SFNT font, or if the unpatented hinter is not compiled in this */
3925  /* instance of the library. */
3926  /* */
3927  /* <Note> */
3928  /* Since May 2010, TrueType hinting is no longer patented. */
3929  /* */
3930  /* <Since> */
3931  /* 2.3.5 */
3932  /* */
3933  FT_EXPORT( FT_Bool )
3934  FT_Face_SetUnpatentedHinting( FT_Face face,
3935  FT_Bool value );
3936 
3937  /* */
3938 
3939 
3940 FT_END_HEADER
3941 
3942 #endif /* __FREETYPE_H__ */
3943 
3944 
3945 /* END */
FT_FaceRec_::units_per_EM
FT_UShort units_per_EM
Definition: freetype.h:938
FT_CeilFix
FT_CeilFix(FT_Fixed a)
Definition: ftcalc.c:89
FT_Open_Args_::memory_base
const FT_Byte * memory_base
Definition: freetype.h:1832
FT_SizeRec_::face
FT_Face face
Definition: freetype.h:1397
FT_Get_Kerning
FT_Get_Kerning(FT_Face face, FT_UInt left_glyph, FT_UInt right_glyph, FT_UInt kern_mode, FT_Vector *akerning)
Definition: ftobjs.c:2963
FT_Parameter
struct FT_Parameter_ FT_Parameter
FT_SizeRec_
Definition: freetype.h:1395
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int FT_Error
Definition: fttypes.h:296
FT_DivFix
FT_DivFix(FT_Long a, FT_Long b)
Definition: ftcalc.c:536
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FT_Int num_fixed_sizes
Definition: freetype.h:925
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signed long FT_Long
Definition: fttypes.h:238
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FT_Pos x_ppem
Definition: freetype.h:301
FT_ULong
unsigned long FT_ULong
Definition: fttypes.h:249
FT_Select_Size
FT_Select_Size(FT_Face face, FT_Int strike_index)
Definition: ftobjs.c:2759
FT_Bitmap_Size_::width
FT_Short width
Definition: freetype.h:297
FT_Size_RequestRec_::height
FT_Long height
Definition: freetype.h:2189
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FT_BEGIN_HEADER typedef signed long FT_Pos
Definition: ftimage.h:59
FT_GlyphSlotRec_
Definition: freetype.h:1605
FT_Open_Args
struct FT_Open_Args_ FT_Open_Args
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FT_Parameter * params
Definition: freetype.h:1838
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FT_Pos vertBearingY
Definition: freetype.h:250
FT_SubGlyphRec_
Definition: ftgloadr.h:57
FT_Kerning_Mode_
FT_Kerning_Mode_
Definition: freetype.h:2785
FT_END_HEADER
#define FT_END_HEADER
Definition: ftheader.h:54
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FT_CharMap charmap
Definition: freetype.h:951
FT_Set_Transform
FT_Set_Transform(FT_Face face, FT_Matrix *matrix, FT_Vector *delta)
Definition: ftobjs.c:466
FT_Open_Args_::flags
FT_UInt flags
Definition: freetype.h:1831
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FT_Long width
Definition: freetype.h:2188
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Definition: ftobjs.h:439
FT_Size_RequestRec
struct FT_Size_RequestRec_ FT_Size_RequestRec
FT_Int
signed int FT_Int
Definition: fttypes.h:216
FT_ListRec_
Definition: fttypes.h:563
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FT_Short ascender
Definition: freetype.h:939
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FT_Long face_index
Definition: freetype.h:915
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void * other
Definition: freetype.h:1635
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FT_Short underline_thickness
Definition: freetype.h:947
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FT_String * pathname
Definition: freetype.h:1834
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enum FT_Render_Mode_ FT_Render_Mode
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FT_Long num_faces
Definition: freetype.h:914
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Definition: fttypes.h:381
FT_Get_Next_Char
FT_Get_Next_Char(FT_Face face, FT_ULong char_code, FT_UInt *agindex)
Definition: ftobjs.c:3339
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FT_Short height
Definition: freetype.h:296
FT_RoundFix
FT_RoundFix(FT_Fixed a)
Definition: ftcalc.c:79
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FT_String * family_name
Definition: freetype.h:922
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FT_Short descender
Definition: freetype.h:940
FT_Reference_Face
FT_Reference_Face(FT_Face face)
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Definition: ftimage.h:383
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FT_String * style_name
Definition: freetype.h:923
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FT_UShort platform_id
Definition: freetype.h:740
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FT_Bitmap_Size * available_sizes
Definition: freetype.h:926
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FT_Fixed linearHoriAdvance
Definition: freetype.h:1614
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FT_Int bitmap_top
Definition: freetype.h:1622
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struct FT_SizeRec_ FT_SizeRec
a
GLboolean GLboolean GLboolean GLboolean a
Definition: glew.h:8736
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FT_Library library
Definition: cffdrivr.c:409
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FT_Vector advance
Definition: freetype.h:1616
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FT_Library library
Definition: freetype.h:1607
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struct FT_Size_InternalRec_ * FT_Size_Internal
Definition: freetype.h:1302
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FT_Done_FreeType(FT_Library library)
Definition: ftinit.c:264
FT_New_Memory_Face
FT_New_Memory_Face(FT_Library library, const FT_Byte *file_base, FT_Long file_size, FT_Long face_index, FT_Face *aface)
Definition: ftobjs.c:1224
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struct FT_Slot_InternalRec_ * FT_Slot_Internal
Definition: freetype.h:1433
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FT_Face_GetCharVariantIsDefault(FT_Face face, FT_ULong charcode, FT_ULong variantSelector)
Definition: ftobjs.c:3413
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struct FT_GlyphSlotRec_ FT_GlyphSlotRec
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struct FT_ModuleRec_ * FT_Module
Definition: freetype.h:348
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FT_UShort encoding_id
Definition: freetype.h:741
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FT_Pos max_advance
Definition: freetype.h:1371
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FT_Render_Mode_
Definition: freetype.h:2709
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FT_Init_FreeType(FT_Library *alibrary)
Definition: ftinit.c:232
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FT_BEGIN_HEADER typedef unsigned char FT_Bool
Definition: fttypes.h:104
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FT_Face face
Definition: freetype.h:738
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FT_Set_Pixel_Sizes(FT_Face face, FT_UInt pixel_width, FT_UInt pixel_height)
Definition: ftobjs.c:2927
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Definition: freetype.h:1608
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FT_Outline outline
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FT_Get_Charmap_Index(FT_CharMap charmap)
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Definition: freetype.h:1610
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Definition: fttypes.h:150
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Definition: ftheader.h:36
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Definition: freetype.h:299
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FT_Load_Glyph(FT_Face face, FT_UInt glyph_index, FT_Int32 load_flags)
Definition: ftobjs.c:563
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Definition: freetype.h:1630
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FT_ULong tag
Definition: freetype.h:1765
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Definition: freetype.h:247
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Definition: ftobjs.c:3370
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Definition: eglext.h:87
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Definition: freetype.h:928
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FT_Face_GetVariantsOfChar(FT_Face face, FT_ULong charcode)
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FT_Request_Size(FT_Face face, FT_Size_Request req)
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FT_Get_Char_Index(FT_Face face, FT_ULong charcode)
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Definition: freetype.h:912
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Definition: ftobjs.h:320
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FT_Set_Char_Size(FT_Face face, FT_F26Dot6 char_width, FT_F26Dot6 char_height, FT_UInt horz_resolution, FT_UInt vert_resolution)
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FT_MulDiv(FT_Long a, FT_Long b, FT_Long c)
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FT_Face_SetUnpatentedHinting(FT_Face face, FT_Bool value)
Definition: ftpatent.c:265
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void * extensions
Definition: freetype.h:962
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FT_Face_CheckTrueTypePatents(FT_Face face)
Definition: ftpatent.c:250
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FT_Get_Postscript_Name(FT_Face face)
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FT_Get_Track_Kerning(FT_Face face, FT_Fixed point_size, FT_Int degree, FT_Fixed *akerning)
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Definition: gl2ext.h:1490
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Definition: freetype.h:243
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const GLfloat * c
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struct FT_FaceRec_ * FT_Face
Definition: freetype.h:399
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Definition: freetype.h:1837
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struct FT_Size_Metrics_ FT_Size_Metrics
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Definition: ftobjs.c:809
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FT_Get_FSType_Flags(FT_Face face)
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struct FT_Size_RequestRec_ * FT_Size_Request
Definition: freetype.h:2204
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Definition: ftbbox.c:579
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Definition: freetype.h:1627
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Definition: freetype.h:1362
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Definition: freetype.h:294
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Definition: freetype.h:929
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enum FT_Encoding_ FT_Encoding
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Definition: freetype.h:1632
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GLuint GLenum matrix
Definition: glew.h:13408
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Definition: freetype.h:936
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Definition: ftobjs.h:824
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Definition: freetype.h:655
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Definition: ftobjs.c:3105
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Definition: freetype.h:950
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signed short FT_Short
Definition: fttypes.h:194
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struct FT_CharMapRec_ FT_CharMapRec
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struct FT_FaceRec_ FT_FaceRec
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Definition: freetype.h:917
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typedefFT_BEGIN_HEADER struct FT_MemoryRec_ * FT_Memory
Definition: ftsystem.h:66
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FT_Stream stream
Definition: freetype.h:1835
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enum FT_Kerning_Mode_ FT_Kerning_Mode
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FT_Size_Request_Type type
Definition: freetype.h:2187
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FT_MulFix(FT_Long a, FT_Long b)
Definition: ftcalc.c:435
FT_F26Dot6
signed long FT_F26Dot6
Definition: fttypes.h:272
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enum FT_Size_Request_Type_ FT_Size_Request_Type
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FT_UInt horiResolution
Definition: freetype.h:2190
value
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Definition: eglext.h:301
const
#define const
Definition: zconf.h:91
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Definition: freetype.h:959
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FT_Fixed y_scale
Definition: freetype.h:1366
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FT_Vector_Transform(FT_Vector *vec, const FT_Matrix *matrix)
Definition: ftoutln.c:672
FT_Fixed
signed long FT_Fixed
Definition: fttypes.h:284
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Definition: freetype.h:1621
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FT_BEGIN_HEADER struct FT_Glyph_Metrics_ FT_Glyph_Metrics
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FT_Glyph_Format format
Definition: freetype.h:1618
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Definition: freetype.h:736
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struct FT_Face_InternalRec_ * FT_Face_Internal
Definition: freetype.h:767
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Definition: freetype.h:920
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FT_GlyphSlot glyph
Definition: freetype.h:949
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struct FT_SizeRec_ * FT_Size
Definition: freetype.h:429
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unsigned int FT_UInt
Definition: fttypes.h:227
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Definition: freetype.h:450
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#define FT_EXPORT(x)
Definition: ftconfig.h:500
FT_Glyph_Format
enum FT_Glyph_Format_ FT_Glyph_Format
FT_ENC_TAG
#define FT_ENC_TAG(value, a, b, c, d)
Definition: freetype.h:507
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Definition: freetype.h:941
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struct FT_DriverRec_ * FT_Driver
Definition: freetype.h:360
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void * control_data
Definition: freetype.h:1629
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FT_Open_Face(FT_Library library, const FT_Open_Args *args, FT_Long face_index, FT_Face *aface)
Definition: ftobjs.c:1994
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Definition: freetype.h:1360
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FT_New_Face(FT_Library library, const char *filepathname, FT_Long face_index, FT_Face *aface)
Definition: ftobjs.c:1199
b
GLdouble GLdouble GLdouble b
Definition: glew.h:8383
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Definition: freetype.h:1365
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Definition: freetype.h:1615
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Definition: ftobjs.h:378
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FT_Glyph_Metrics metrics
Definition: freetype.h:1613
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Definition: freetype.h:1766
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struct FT_SubGlyphRec_ * FT_SubGlyph
Definition: freetype.h:1421
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Definition: freetype.h:1368
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Definition: freetype.h:918
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Definition: freetype.h:1370
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Definition: freetype.h:302
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Definition: freetype.h:955
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Definition: freetype.h:242
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struct FT_LibraryRec_ * FT_Library
Definition: freetype.h:335
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FT_Done_Face(FT_Face face)
Definition: ftobjs.c:2329
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struct FT_Bitmap_Size_ FT_Bitmap_Size
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Definition: ftcalc.c:99
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unsigned short FT_UShort
Definition: fttypes.h:205
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Definition: ftsystem.h:321
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Definition: freetype.h:251
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Definition: freetype.h:957
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Definition: freetype.h:2191
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Definition: ftimage.h:116
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Definition: freetype.h:943
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Definition: freetype.h:374
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Definition: ftobjs.c:4470
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Definition: ftobjs.c:3454
FT_Face_GetCharsOfVariant
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Definition: ftobjs.c:3515
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Definition: freetype.h:946
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Definition: freetype.h:1833
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Definition: freetype.h:1363
FT_Attach_File
FT_Attach_File(FT_Face face, const char *filepathname)
Definition: ftobjs.c:2252