Clutter Engine 0.0.1
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tttables.h
1/***************************************************************************/
2/* */
3/* tttables.h */
4/* */
5/* Basic SFNT/TrueType tables definitions and interface */
6/* (specification only). */
7/* */
8/* Copyright 1996-2016 by */
9/* David Turner, Robert Wilhelm, and Werner Lemberg. */
10/* */
11/* This file is part of the FreeType project, and may only be used, */
12/* modified, and distributed under the terms of the FreeType project */
13/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
14/* this file you indicate that you have read the license and */
15/* understand and accept it fully. */
16/* */
17/***************************************************************************/
18
19
20#ifndef TTTABLES_H_
21#define TTTABLES_H_
22
23
24#include <ft2build.h>
25#include FT_FREETYPE_H
26
27#ifdef FREETYPE_H
28#error "freetype.h of FreeType 1 has been loaded!"
29#error "Please fix the directory search order for header files"
30#error "so that freetype.h of FreeType 2 is found first."
31#endif
32
33
34FT_BEGIN_HEADER
35
36 /*************************************************************************/
37 /* */
38 /* <Section> */
39 /* truetype_tables */
40 /* */
41 /* <Title> */
42 /* TrueType Tables */
43 /* */
44 /* <Abstract> */
45 /* TrueType specific table types and functions. */
46 /* */
47 /* <Description> */
48 /* This section contains the definition of TrueType-specific tables */
49 /* as well as some routines used to access and process them. */
50 /* */
51 /* <Order> */
52 /* TT_Header */
53 /* TT_HoriHeader */
54 /* TT_VertHeader */
55 /* TT_OS2 */
56 /* TT_Postscript */
57 /* TT_PCLT */
58 /* TT_MaxProfile */
59 /* */
60 /* FT_Sfnt_Tag */
61 /* FT_Get_Sfnt_Table */
62 /* FT_Load_Sfnt_Table */
63 /* FT_Sfnt_Table_Info */
64 /* */
65 /* FT_Get_CMap_Language_ID */
66 /* FT_Get_CMap_Format */
67 /* */
68 /* FT_PARAM_TAG_UNPATENTED_HINTING */
69 /* */
70 /*************************************************************************/
71
72
73 /*************************************************************************/
74 /* */
75 /* <Struct> */
76 /* TT_Header */
77 /* */
78 /* <Description> */
79 /* A structure used to model a TrueType font header table. All */
80 /* fields follow the TrueType specification. */
81 /* */
82 typedef struct TT_Header_
83 {
84 FT_Fixed Table_Version;
85 FT_Fixed Font_Revision;
86
87 FT_Long CheckSum_Adjust;
88 FT_Long Magic_Number;
89
90 FT_UShort Flags;
91 FT_UShort Units_Per_EM;
92
93 FT_Long Created [2];
94 FT_Long Modified[2];
95
96 FT_Short xMin;
97 FT_Short yMin;
98 FT_Short xMax;
99 FT_Short yMax;
100
101 FT_UShort Mac_Style;
102 FT_UShort Lowest_Rec_PPEM;
103
104 FT_Short Font_Direction;
105 FT_Short Index_To_Loc_Format;
106 FT_Short Glyph_Data_Format;
107
108 } TT_Header;
109
110
111 /*************************************************************************/
112 /* */
113 /* <Struct> */
114 /* TT_HoriHeader */
115 /* */
116 /* <Description> */
117 /* A structure used to model a TrueType horizontal header, the `hhea' */
118 /* table, as well as the corresponding horizontal metrics table, */
119 /* i.e., the `hmtx' table. */
120 /* */
121 /* <Fields> */
122 /* Version :: The table version. */
123 /* */
124 /* Ascender :: The font's ascender, i.e., the distance */
125 /* from the baseline to the top-most of all */
126 /* glyph points found in the font. */
127 /* */
128 /* This value is invalid in many fonts, as */
129 /* it is usually set by the font designer, */
130 /* and often reflects only a portion of the */
131 /* glyphs found in the font (maybe ASCII). */
132 /* */
133 /* You should use the `sTypoAscender' field */
134 /* of the OS/2 table instead if you want */
135 /* the correct one. */
136 /* */
137 /* Descender :: The font's descender, i.e., the distance */
138 /* from the baseline to the bottom-most of */
139 /* all glyph points found in the font. It */
140 /* is negative. */
141 /* */
142 /* This value is invalid in many fonts, as */
143 /* it is usually set by the font designer, */
144 /* and often reflects only a portion of the */
145 /* glyphs found in the font (maybe ASCII). */
146 /* */
147 /* You should use the `sTypoDescender' */
148 /* field of the OS/2 table instead if you */
149 /* want the correct one. */
150 /* */
151 /* Line_Gap :: The font's line gap, i.e., the distance */
152 /* to add to the ascender and descender to */
153 /* get the BTB, i.e., the */
154 /* baseline-to-baseline distance for the */
155 /* font. */
156 /* */
157 /* advance_Width_Max :: This field is the maximum of all advance */
158 /* widths found in the font. It can be */
159 /* used to compute the maximum width of an */
160 /* arbitrary string of text. */
161 /* */
162 /* min_Left_Side_Bearing :: The minimum left side bearing of all */
163 /* glyphs within the font. */
164 /* */
165 /* min_Right_Side_Bearing :: The minimum right side bearing of all */
166 /* glyphs within the font. */
167 /* */
168 /* xMax_Extent :: The maximum horizontal extent (i.e., the */
169 /* `width' of a glyph's bounding box) for */
170 /* all glyphs in the font. */
171 /* */
172 /* caret_Slope_Rise :: The rise coefficient of the cursor's */
173 /* slope of the cursor (slope=rise/run). */
174 /* */
175 /* caret_Slope_Run :: The run coefficient of the cursor's */
176 /* slope. */
177 /* */
178 /* Reserved :: 8~reserved bytes. */
179 /* */
180 /* metric_Data_Format :: Always~0. */
181 /* */
182 /* number_Of_HMetrics :: Number of HMetrics entries in the `hmtx' */
183 /* table -- this value can be smaller than */
184 /* the total number of glyphs in the font. */
185 /* */
186 /* long_metrics :: A pointer into the `hmtx' table. */
187 /* */
188 /* short_metrics :: A pointer into the `hmtx' table. */
189 /* */
190 /* <Note> */
191 /* IMPORTANT: The TT_HoriHeader and TT_VertHeader structures should */
192 /* be identical except for the names of their fields, */
193 /* which are different. */
194 /* */
195 /* This ensures that a single function in the `ttload' */
196 /* module is able to read both the horizontal and vertical */
197 /* headers. */
198 /* */
199 typedef struct TT_HoriHeader_
200 {
201 FT_Fixed Version;
202 FT_Short Ascender;
203 FT_Short Descender;
204 FT_Short Line_Gap;
205
206 FT_UShort advance_Width_Max; /* advance width maximum */
207
208 FT_Short min_Left_Side_Bearing; /* minimum left-sb */
209 FT_Short min_Right_Side_Bearing; /* minimum right-sb */
210 FT_Short xMax_Extent; /* xmax extents */
211 FT_Short caret_Slope_Rise;
212 FT_Short caret_Slope_Run;
213 FT_Short caret_Offset;
214
215 FT_Short Reserved[4];
216
217 FT_Short metric_Data_Format;
218 FT_UShort number_Of_HMetrics;
219
220 /* The following fields are not defined by the TrueType specification */
221 /* but they are used to connect the metrics header to the relevant */
222 /* `HMTX' table. */
223
224 void* long_metrics;
225 void* short_metrics;
226
227 } TT_HoriHeader;
228
229
230 /*************************************************************************/
231 /* */
232 /* <Struct> */
233 /* TT_VertHeader */
234 /* */
235 /* <Description> */
236 /* A structure used to model a TrueType vertical header, the `vhea' */
237 /* table, as well as the corresponding vertical metrics table, i.e., */
238 /* the `vmtx' table. */
239 /* */
240 /* <Fields> */
241 /* Version :: The table version. */
242 /* */
243 /* Ascender :: The font's ascender, i.e., the distance */
244 /* from the baseline to the top-most of */
245 /* all glyph points found in the font. */
246 /* */
247 /* This value is invalid in many fonts, as */
248 /* it is usually set by the font designer, */
249 /* and often reflects only a portion of */
250 /* the glyphs found in the font (maybe */
251 /* ASCII). */
252 /* */
253 /* You should use the `sTypoAscender' */
254 /* field of the OS/2 table instead if you */
255 /* want the correct one. */
256 /* */
257 /* Descender :: The font's descender, i.e., the */
258 /* distance from the baseline to the */
259 /* bottom-most of all glyph points found */
260 /* in the font. It is negative. */
261 /* */
262 /* This value is invalid in many fonts, as */
263 /* it is usually set by the font designer, */
264 /* and often reflects only a portion of */
265 /* the glyphs found in the font (maybe */
266 /* ASCII). */
267 /* */
268 /* You should use the `sTypoDescender' */
269 /* field of the OS/2 table instead if you */
270 /* want the correct one. */
271 /* */
272 /* Line_Gap :: The font's line gap, i.e., the distance */
273 /* to add to the ascender and descender to */
274 /* get the BTB, i.e., the */
275 /* baseline-to-baseline distance for the */
276 /* font. */
277 /* */
278 /* advance_Height_Max :: This field is the maximum of all */
279 /* advance heights found in the font. It */
280 /* can be used to compute the maximum */
281 /* height of an arbitrary string of text. */
282 /* */
283 /* min_Top_Side_Bearing :: The minimum top side bearing of all */
284 /* glyphs within the font. */
285 /* */
286 /* min_Bottom_Side_Bearing :: The minimum bottom side bearing of all */
287 /* glyphs within the font. */
288 /* */
289 /* yMax_Extent :: The maximum vertical extent (i.e., the */
290 /* `height' of a glyph's bounding box) for */
291 /* all glyphs in the font. */
292 /* */
293 /* caret_Slope_Rise :: The rise coefficient of the cursor's */
294 /* slope of the cursor (slope=rise/run). */
295 /* */
296 /* caret_Slope_Run :: The run coefficient of the cursor's */
297 /* slope. */
298 /* */
299 /* caret_Offset :: The cursor's offset for slanted fonts. */
300 /* This value is `reserved' in vmtx */
301 /* version 1.0. */
302 /* */
303 /* Reserved :: 8~reserved bytes. */
304 /* */
305 /* metric_Data_Format :: Always~0. */
306 /* */
307 /* number_Of_HMetrics :: Number of VMetrics entries in the */
308 /* `vmtx' table -- this value can be */
309 /* smaller than the total number of glyphs */
310 /* in the font. */
311 /* */
312 /* long_metrics :: A pointer into the `vmtx' table. */
313 /* */
314 /* short_metrics :: A pointer into the `vmtx' table. */
315 /* */
316 /* <Note> */
317 /* IMPORTANT: The TT_HoriHeader and TT_VertHeader structures should */
318 /* be identical except for the names of their fields, */
319 /* which are different. */
320 /* */
321 /* This ensures that a single function in the `ttload' */
322 /* module is able to read both the horizontal and vertical */
323 /* headers. */
324 /* */
325 typedef struct TT_VertHeader_
326 {
327 FT_Fixed Version;
328 FT_Short Ascender;
329 FT_Short Descender;
330 FT_Short Line_Gap;
331
332 FT_UShort advance_Height_Max; /* advance height maximum */
333
334 FT_Short min_Top_Side_Bearing; /* minimum left-sb or top-sb */
335 FT_Short min_Bottom_Side_Bearing; /* minimum right-sb or bottom-sb */
336 FT_Short yMax_Extent; /* xmax or ymax extents */
337 FT_Short caret_Slope_Rise;
338 FT_Short caret_Slope_Run;
339 FT_Short caret_Offset;
340
341 FT_Short Reserved[4];
342
343 FT_Short metric_Data_Format;
344 FT_UShort number_Of_VMetrics;
345
346 /* The following fields are not defined by the TrueType specification */
347 /* but they're used to connect the metrics header to the relevant */
348 /* `HMTX' or `VMTX' table. */
349
350 void* long_metrics;
351 void* short_metrics;
352
353 } TT_VertHeader;
354
355
356 /*************************************************************************/
357 /* */
358 /* <Struct> */
359 /* TT_OS2 */
360 /* */
361 /* <Description> */
362 /* A structure used to model a TrueType OS/2 table. All fields */
363 /* comply to the OpenType specification. */
364 /* */
365 /* Note that we now support old Mac fonts that do not include an OS/2 */
366 /* table. In this case, the `version' field is always set to 0xFFFF. */
367 /* */
368 typedef struct TT_OS2_
369 {
370 FT_UShort version; /* 0x0001 - more or 0xFFFF */
371 FT_Short xAvgCharWidth;
372 FT_UShort usWeightClass;
373 FT_UShort usWidthClass;
374 FT_UShort fsType;
375 FT_Short ySubscriptXSize;
376 FT_Short ySubscriptYSize;
377 FT_Short ySubscriptXOffset;
378 FT_Short ySubscriptYOffset;
379 FT_Short ySuperscriptXSize;
380 FT_Short ySuperscriptYSize;
381 FT_Short ySuperscriptXOffset;
382 FT_Short ySuperscriptYOffset;
383 FT_Short yStrikeoutSize;
384 FT_Short yStrikeoutPosition;
385 FT_Short sFamilyClass;
386
387 FT_Byte panose[10];
388
389 FT_ULong ulUnicodeRange1; /* Bits 0-31 */
390 FT_ULong ulUnicodeRange2; /* Bits 32-63 */
391 FT_ULong ulUnicodeRange3; /* Bits 64-95 */
392 FT_ULong ulUnicodeRange4; /* Bits 96-127 */
393
394 FT_Char achVendID[4];
395
396 FT_UShort fsSelection;
397 FT_UShort usFirstCharIndex;
398 FT_UShort usLastCharIndex;
399 FT_Short sTypoAscender;
400 FT_Short sTypoDescender;
401 FT_Short sTypoLineGap;
402 FT_UShort usWinAscent;
403 FT_UShort usWinDescent;
404
405 /* only version 1 and higher: */
406
407 FT_ULong ulCodePageRange1; /* Bits 0-31 */
408 FT_ULong ulCodePageRange2; /* Bits 32-63 */
409
410 /* only version 2 and higher: */
411
412 FT_Short sxHeight;
413 FT_Short sCapHeight;
414 FT_UShort usDefaultChar;
415 FT_UShort usBreakChar;
416 FT_UShort usMaxContext;
417
418 /* only version 5 and higher: */
419
420 FT_UShort usLowerOpticalPointSize; /* in twips (1/20th points) */
421 FT_UShort usUpperOpticalPointSize; /* in twips (1/20th points) */
422
423 } TT_OS2;
424
425
426 /*************************************************************************/
427 /* */
428 /* <Struct> */
429 /* TT_Postscript */
430 /* */
431 /* <Description> */
432 /* A structure used to model a TrueType PostScript table. All fields */
433 /* comply to the TrueType specification. This structure does not */
434 /* reference the PostScript glyph names, which can be nevertheless */
435 /* accessed with the `ttpost' module. */
436 /* */
437 typedef struct TT_Postscript_
438 {
439 FT_Fixed FormatType;
440 FT_Fixed italicAngle;
441 FT_Short underlinePosition;
442 FT_Short underlineThickness;
443 FT_ULong isFixedPitch;
444 FT_ULong minMemType42;
445 FT_ULong maxMemType42;
446 FT_ULong minMemType1;
447 FT_ULong maxMemType1;
448
449 /* Glyph names follow in the file, but we don't */
450 /* load them by default. See the ttpost.c file. */
451
452 } TT_Postscript;
453
454
455 /*************************************************************************/
456 /* */
457 /* <Struct> */
458 /* TT_PCLT */
459 /* */
460 /* <Description> */
461 /* A structure used to model a TrueType PCLT table. All fields */
462 /* comply to the TrueType specification. */
463 /* */
464 typedef struct TT_PCLT_
465 {
466 FT_Fixed Version;
467 FT_ULong FontNumber;
468 FT_UShort Pitch;
469 FT_UShort xHeight;
470 FT_UShort Style;
471 FT_UShort TypeFamily;
472 FT_UShort CapHeight;
473 FT_UShort SymbolSet;
474 FT_Char TypeFace[16];
475 FT_Char CharacterComplement[8];
476 FT_Char FileName[6];
477 FT_Char StrokeWeight;
478 FT_Char WidthType;
479 FT_Byte SerifStyle;
480 FT_Byte Reserved;
481
482 } TT_PCLT;
483
484
485 /*************************************************************************/
486 /* */
487 /* <Struct> */
488 /* TT_MaxProfile */
489 /* */
490 /* <Description> */
491 /* The maximum profile is a table containing many max values, which */
492 /* can be used to pre-allocate arrays. This ensures that no memory */
493 /* allocation occurs during a glyph load. */
494 /* */
495 /* <Fields> */
496 /* version :: The version number. */
497 /* */
498 /* numGlyphs :: The number of glyphs in this TrueType */
499 /* font. */
500 /* */
501 /* maxPoints :: The maximum number of points in a */
502 /* non-composite TrueType glyph. See also */
503 /* the structure element */
504 /* `maxCompositePoints'. */
505 /* */
506 /* maxContours :: The maximum number of contours in a */
507 /* non-composite TrueType glyph. See also */
508 /* the structure element */
509 /* `maxCompositeContours'. */
510 /* */
511 /* maxCompositePoints :: The maximum number of points in a */
512 /* composite TrueType glyph. See also the */
513 /* structure element `maxPoints'. */
514 /* */
515 /* maxCompositeContours :: The maximum number of contours in a */
516 /* composite TrueType glyph. See also the */
517 /* structure element `maxContours'. */
518 /* */
519 /* maxZones :: The maximum number of zones used for */
520 /* glyph hinting. */
521 /* */
522 /* maxTwilightPoints :: The maximum number of points in the */
523 /* twilight zone used for glyph hinting. */
524 /* */
525 /* maxStorage :: The maximum number of elements in the */
526 /* storage area used for glyph hinting. */
527 /* */
528 /* maxFunctionDefs :: The maximum number of function */
529 /* definitions in the TrueType bytecode for */
530 /* this font. */
531 /* */
532 /* maxInstructionDefs :: The maximum number of instruction */
533 /* definitions in the TrueType bytecode for */
534 /* this font. */
535 /* */
536 /* maxStackElements :: The maximum number of stack elements used */
537 /* during bytecode interpretation. */
538 /* */
539 /* maxSizeOfInstructions :: The maximum number of TrueType opcodes */
540 /* used for glyph hinting. */
541 /* */
542 /* maxComponentElements :: The maximum number of simple (i.e., non- */
543 /* composite) glyphs in a composite glyph. */
544 /* */
545 /* maxComponentDepth :: The maximum nesting depth of composite */
546 /* glyphs. */
547 /* */
548 /* <Note> */
549 /* This structure is only used during font loading. */
550 /* */
551 typedef struct TT_MaxProfile_
552 {
553 FT_Fixed version;
554 FT_UShort numGlyphs;
555 FT_UShort maxPoints;
556 FT_UShort maxContours;
557 FT_UShort maxCompositePoints;
558 FT_UShort maxCompositeContours;
559 FT_UShort maxZones;
560 FT_UShort maxTwilightPoints;
561 FT_UShort maxStorage;
562 FT_UShort maxFunctionDefs;
563 FT_UShort maxInstructionDefs;
564 FT_UShort maxStackElements;
565 FT_UShort maxSizeOfInstructions;
566 FT_UShort maxComponentElements;
567 FT_UShort maxComponentDepth;
568
569 } TT_MaxProfile;
570
571
572 /*************************************************************************/
573 /* */
574 /* <Enum> */
575 /* FT_Sfnt_Tag */
576 /* */
577 /* <Description> */
578 /* An enumeration used to specify the index of an SFNT table. */
579 /* Used in the @FT_Get_Sfnt_Table API function. */
580 /* */
581 /* <Values> */
582 /* FT_SFNT_HEAD :: To access the font's @TT_Header structure. */
583 /* */
584 /* FT_SFNT_MAXP :: To access the font's @TT_MaxProfile structure. */
585 /* */
586 /* FT_SFNT_OS2 :: To access the font's @TT_OS2 structure. */
587 /* */
588 /* FT_SFNT_HHEA :: To access the font's @TT_HoriHeader structure. */
589 /* */
590 /* FT_SFNT_VHEA :: To access the font's @TT_VertHeader struture. */
591 /* */
592 /* FT_SFNT_POST :: To access the font's @TT_Postscript structure. */
593 /* */
594 /* FT_SFNT_PCLT :: To access the font's @TT_PCLT structure. */
595 /* */
596 typedef enum FT_Sfnt_Tag_
597 {
598 FT_SFNT_HEAD,
599 FT_SFNT_MAXP,
600 FT_SFNT_OS2,
601 FT_SFNT_HHEA,
602 FT_SFNT_VHEA,
603 FT_SFNT_POST,
604 FT_SFNT_PCLT,
605
606 FT_SFNT_MAX
607
608 } FT_Sfnt_Tag;
609
610 /* these constants are deprecated; use the corresponding `FT_Sfnt_Tag' */
611 /* values instead */
612#define ft_sfnt_head FT_SFNT_HEAD
613#define ft_sfnt_maxp FT_SFNT_MAXP
614#define ft_sfnt_os2 FT_SFNT_OS2
615#define ft_sfnt_hhea FT_SFNT_HHEA
616#define ft_sfnt_vhea FT_SFNT_VHEA
617#define ft_sfnt_post FT_SFNT_POST
618#define ft_sfnt_pclt FT_SFNT_PCLT
619
620
621 /*************************************************************************/
622 /* */
623 /* <Function> */
624 /* FT_Get_Sfnt_Table */
625 /* */
626 /* <Description> */
627 /* Return a pointer to a given SFNT table within a face. */
628 /* */
629 /* <Input> */
630 /* face :: A handle to the source. */
631 /* */
632 /* tag :: The index of the SFNT table. */
633 /* */
634 /* <Return> */
635 /* A type-less pointer to the table. This will be~0 in case of */
636 /* error, or if the corresponding table was not found *OR* loaded */
637 /* from the file. */
638 /* */
639 /* Use a typecast according to `tag' to access the structure */
640 /* elements. */
641 /* */
642 /* <Note> */
643 /* The table is owned by the face object and disappears with it. */
644 /* */
645 /* This function is only useful to access SFNT tables that are loaded */
646 /* by the sfnt, truetype, and opentype drivers. See @FT_Sfnt_Tag for */
647 /* a list. */
648 /* */
649 /* Here an example how to access the `vhea' table: */
650 /* */
651 /* { */
652 /* TT_VertHeader* vert_header; */
653 /* */
654 /* */
655 /* vert_header = */
656 /* (TT_VertHeader*)FT_Get_Sfnt_Table( face, FT_SFNT_VHEA ); */
657 /* } */
658 /* */
659 FT_EXPORT( void* )
660 FT_Get_Sfnt_Table( FT_Face face,
661 FT_Sfnt_Tag tag );
662
663
664 /**************************************************************************
665 *
666 * @function:
667 * FT_Load_Sfnt_Table
668 *
669 * @description:
670 * Load any font table into client memory.
671 *
672 * @input:
673 * face ::
674 * A handle to the source face.
675 *
676 * tag ::
677 * The four-byte tag of the table to load. Use the value~0 if you want
678 * to access the whole font file. Otherwise, you can use one of the
679 * definitions found in the @FT_TRUETYPE_TAGS_H file, or forge a new
680 * one with @FT_MAKE_TAG.
681 *
682 * offset ::
683 * The starting offset in the table (or file if tag == 0).
684 *
685 * @output:
686 * buffer ::
687 * The target buffer address. The client must ensure that the memory
688 * array is big enough to hold the data.
689 *
690 * @inout:
691 * length ::
692 * If the `length' parameter is NULL, then try to load the whole table.
693 * Return an error code if it fails.
694 *
695 * Else, if `*length' is~0, exit immediately while returning the
696 * table's (or file) full size in it.
697 *
698 * Else the number of bytes to read from the table or file, from the
699 * starting offset.
700 *
701 * @return:
702 * FreeType error code. 0~means success.
703 *
704 * @note:
705 * If you need to determine the table's length you should first call this
706 * function with `*length' set to~0, as in the following example:
707 *
708 * {
709 * FT_ULong length = 0;
710 *
711 *
712 * error = FT_Load_Sfnt_Table( face, tag, 0, NULL, &length );
713 * if ( error ) { ... table does not exist ... }
714 *
715 * buffer = malloc( length );
716 * if ( buffer == NULL ) { ... not enough memory ... }
717 *
718 * error = FT_Load_Sfnt_Table( face, tag, 0, buffer, &length );
719 * if ( error ) { ... could not load table ... }
720 * }
721 *
722 * Note that structures like @TT_Header or @TT_OS2 can't be used with
723 * this function; they are limited to @FT_Get_Sfnt_Table. Reason is that
724 * those structures depend on the processor architecture, with varying
725 * size (e.g. 32bit vs. 64bit) or order (big endian vs. little endian).
726 *
727 */
728 FT_EXPORT( FT_Error )
729 FT_Load_Sfnt_Table( FT_Face face,
730 FT_ULong tag,
731 FT_Long offset,
732 FT_Byte* buffer,
733 FT_ULong* length );
734
735
736 /**************************************************************************
737 *
738 * @function:
739 * FT_Sfnt_Table_Info
740 *
741 * @description:
742 * Return information on an SFNT table.
743 *
744 * @input:
745 * face ::
746 * A handle to the source face.
747 *
748 * table_index ::
749 * The index of an SFNT table. The function returns
750 * FT_Err_Table_Missing for an invalid value.
751 *
752 * @inout:
753 * tag ::
754 * The name tag of the SFNT table. If the value is NULL, `table_index'
755 * is ignored, and `length' returns the number of SFNT tables in the
756 * font.
757 *
758 * @output:
759 * length ::
760 * The length of the SFNT table (or the number of SFNT tables, depending
761 * on `tag').
762 *
763 * @return:
764 * FreeType error code. 0~means success.
765 *
766 * @note:
767 * While parsing fonts, FreeType handles SFNT tables with length zero as
768 * missing.
769 *
770 */
771 FT_EXPORT( FT_Error )
772 FT_Sfnt_Table_Info( FT_Face face,
773 FT_UInt table_index,
774 FT_ULong *tag,
775 FT_ULong *length );
776
777
778 /*************************************************************************/
779 /* */
780 /* <Function> */
781 /* FT_Get_CMap_Language_ID */
782 /* */
783 /* <Description> */
784 /* Return TrueType/sfnt specific cmap language ID. Definitions of */
785 /* language ID values are in `ttnameid.h'. */
786 /* */
787 /* <Input> */
788 /* charmap :: */
789 /* The target charmap. */
790 /* */
791 /* <Return> */
792 /* The language ID of `charmap'. If `charmap' doesn't belong to a */
793 /* TrueType/sfnt face, just return~0 as the default value. */
794 /* */
795 /* For a format~14 cmap (to access Unicode IVS), the return value is */
796 /* 0xFFFFFFFF. */
797 /* */
798 FT_EXPORT( FT_ULong )
799 FT_Get_CMap_Language_ID( FT_CharMap charmap );
800
801
802 /*************************************************************************/
803 /* */
804 /* <Function> */
805 /* FT_Get_CMap_Format */
806 /* */
807 /* <Description> */
808 /* Return TrueType/sfnt specific cmap format. */
809 /* */
810 /* <Input> */
811 /* charmap :: */
812 /* The target charmap. */
813 /* */
814 /* <Return> */
815 /* The format of `charmap'. If `charmap' doesn't belong to a */
816 /* TrueType/sfnt face, return -1. */
817 /* */
818 FT_EXPORT( FT_Long )
819 FT_Get_CMap_Format( FT_CharMap charmap );
820
821 /* */
822
823
824FT_END_HEADER
825
826#endif /* TTTABLES_H_ */
827
828
829/* END */
FT_CharMapRec_
Definition freetype.h:831
FT_FaceRec_
Definition freetype.h:1034
TT_Header_
Definition tttables.h:83
TT_HoriHeader_
Definition tttables.h:200
TT_MaxProfile_
Definition tttables.h:552
TT_OS2_
Definition tttables.h:369
TT_PCLT_
Definition tttables.h:465
TT_Postscript_
Definition tttables.h:438
TT_VertHeader_
Definition tttables.h:326
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