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tttypes.h
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1 /***************************************************************************/
2 /* */
3 /* tttypes.h */
4 /* */
5 /* Basic SFNT/TrueType type definitions and interface (specification */
6 /* only). */
7 /* */
8 /* Copyright 1996-2018 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 TTTYPES_H_
21 #define TTTYPES_H_
22 
23 
24 #include <ft2build.h>
25 #include FT_TRUETYPE_TABLES_H
26 #include FT_INTERNAL_OBJECTS_H
27 
28 #ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT
29 #include FT_MULTIPLE_MASTERS_H
30 #endif
31 
32 
33 FT_BEGIN_HEADER
34 
35 
36  /*************************************************************************/
37  /*************************************************************************/
38  /*************************************************************************/
39  /*** ***/
40  /*** ***/
41  /*** REQUIRED TRUETYPE/OPENTYPE TABLES DEFINITIONS ***/
42  /*** ***/
43  /*** ***/
44  /*************************************************************************/
45  /*************************************************************************/
46  /*************************************************************************/
47 
48 
49  /*************************************************************************/
50  /* */
51  /* <Struct> */
52  /* TTC_HeaderRec */
53  /* */
54  /* <Description> */
55  /* TrueType collection header. This table contains the offsets of */
56  /* the font headers of each distinct TrueType face in the file. */
57  /* */
58  /* <Fields> */
59  /* tag :: Must be `ttc ' to indicate a TrueType collection. */
60  /* */
61  /* version :: The version number. */
62  /* */
63  /* count :: The number of faces in the collection. The */
64  /* specification says this should be an unsigned long, but */
65  /* we use a signed long since we need the value -1 for */
66  /* specific purposes. */
67  /* */
68  /* offsets :: The offsets of the font headers, one per face. */
69  /* */
70  typedef struct TTC_HeaderRec_
71  {
72  FT_ULong tag;
73  FT_Fixed version;
74  FT_Long count;
75  FT_ULong* offsets;
76 
77  } TTC_HeaderRec;
78 
79 
80  /*************************************************************************/
81  /* */
82  /* <Struct> */
83  /* SFNT_HeaderRec */
84  /* */
85  /* <Description> */
86  /* SFNT file format header. */
87  /* */
88  /* <Fields> */
89  /* format_tag :: The font format tag. */
90  /* */
91  /* num_tables :: The number of tables in file. */
92  /* */
93  /* search_range :: Must be `16 * (max power of 2 <= num_tables)'. */
94  /* */
95  /* entry_selector :: Must be log2 of `search_range / 16'. */
96  /* */
97  /* range_shift :: Must be `num_tables * 16 - search_range'. */
98  /* */
99  typedef struct SFNT_HeaderRec_
100  {
101  FT_ULong format_tag;
102  FT_UShort num_tables;
103  FT_UShort search_range;
104  FT_UShort entry_selector;
105  FT_UShort range_shift;
106 
107  FT_ULong offset; /* not in file */
108 
109  } SFNT_HeaderRec, *SFNT_Header;
110 
111 
112  /*************************************************************************/
113  /* */
114  /* <Struct> */
115  /* TT_TableRec */
116  /* */
117  /* <Description> */
118  /* This structure describes a given table of a TrueType font. */
119  /* */
120  /* <Fields> */
121  /* Tag :: A four-bytes tag describing the table. */
122  /* */
123  /* CheckSum :: The table checksum. This value can be ignored. */
124  /* */
125  /* Offset :: The offset of the table from the start of the TrueType */
126  /* font in its resource. */
127  /* */
128  /* Length :: The table length (in bytes). */
129  /* */
130  typedef struct TT_TableRec_
131  {
132  FT_ULong Tag; /* table type */
133  FT_ULong CheckSum; /* table checksum */
134  FT_ULong Offset; /* table file offset */
135  FT_ULong Length; /* table length */
136 
137  } TT_TableRec, *TT_Table;
138 
139 
140  /*************************************************************************/
141  /* */
142  /* <Struct> */
143  /* WOFF_HeaderRec */
144  /* */
145  /* <Description> */
146  /* WOFF file format header. */
147  /* */
148  /* <Fields> */
149  /* See */
150  /* */
151  /* https://www.w3.org/TR/WOFF/#WOFFHeader */
152  /* */
153  typedef struct WOFF_HeaderRec_
154  {
155  FT_ULong signature;
156  FT_ULong flavor;
157  FT_ULong length;
158  FT_UShort num_tables;
159  FT_UShort reserved;
160  FT_ULong totalSfntSize;
161  FT_UShort majorVersion;
162  FT_UShort minorVersion;
163  FT_ULong metaOffset;
164  FT_ULong metaLength;
165  FT_ULong metaOrigLength;
166  FT_ULong privOffset;
167  FT_ULong privLength;
168 
169  } WOFF_HeaderRec, *WOFF_Header;
170 
171 
172  /*************************************************************************/
173  /* */
174  /* <Struct> */
175  /* WOFF_TableRec */
176  /* */
177  /* <Description> */
178  /* This structure describes a given table of a WOFF font. */
179  /* */
180  /* <Fields> */
181  /* Tag :: A four-bytes tag describing the table. */
182  /* */
183  /* Offset :: The offset of the table from the start of the WOFF */
184  /* font in its resource. */
185  /* */
186  /* CompLength :: Compressed table length (in bytes). */
187  /* */
188  /* OrigLength :: Uncompressed table length (in bytes). */
189  /* */
190  /* CheckSum :: The table checksum. This value can be ignored. */
191  /* */
192  /* OrigOffset :: The uncompressed table file offset. This value gets */
193  /* computed while constructing the (uncompressed) SFNT */
194  /* header. It is not contained in the WOFF file. */
195  /* */
196  typedef struct WOFF_TableRec_
197  {
198  FT_ULong Tag; /* table ID */
199  FT_ULong Offset; /* table file offset */
200  FT_ULong CompLength; /* compressed table length */
201  FT_ULong OrigLength; /* uncompressed table length */
202  FT_ULong CheckSum; /* uncompressed checksum */
203 
204  FT_ULong OrigOffset; /* uncompressed table file offset */
205  /* (not in the WOFF file) */
206  } WOFF_TableRec, *WOFF_Table;
207 
208 
209  /*************************************************************************/
210  /* */
211  /* <Struct> */
212  /* TT_LongMetricsRec */
213  /* */
214  /* <Description> */
215  /* A structure modeling the long metrics of the `hmtx' and `vmtx' */
216  /* TrueType tables. The values are expressed in font units. */
217  /* */
218  /* <Fields> */
219  /* advance :: The advance width or height for the glyph. */
220  /* */
221  /* bearing :: The left-side or top-side bearing for the glyph. */
222  /* */
223  typedef struct TT_LongMetricsRec_
224  {
225  FT_UShort advance;
226  FT_Short bearing;
227 
228  } TT_LongMetricsRec, *TT_LongMetrics;
229 
230 
231  /*************************************************************************/
232  /* */
233  /* <Type> */
234  /* TT_ShortMetrics */
235  /* */
236  /* <Description> */
237  /* A simple type to model the short metrics of the `hmtx' and `vmtx' */
238  /* tables. */
239  /* */
240  typedef FT_Short TT_ShortMetrics;
241 
242 
243  /*************************************************************************/
244  /* */
245  /* <Struct> */
246  /* TT_NameRec */
247  /* */
248  /* <Description> */
249  /* A structure modeling TrueType name records. Name records are used */
250  /* to store important strings like family name, style name, */
251  /* copyright, etc. in _localized_ versions (i.e., language, encoding, */
252  /* etc). */
253  /* */
254  /* <Fields> */
255  /* platformID :: The ID of the name's encoding platform. */
256  /* */
257  /* encodingID :: The platform-specific ID for the name's encoding. */
258  /* */
259  /* languageID :: The platform-specific ID for the name's language. */
260  /* */
261  /* nameID :: The ID specifying what kind of name this is. */
262  /* */
263  /* stringLength :: The length of the string in bytes. */
264  /* */
265  /* stringOffset :: The offset to the string in the `name' table. */
266  /* */
267  /* string :: A pointer to the string's bytes. Note that these */
268  /* are usually UTF-16 encoded characters. */
269  /* */
270  typedef struct TT_NameRec_
271  {
272  FT_UShort platformID;
273  FT_UShort encodingID;
274  FT_UShort languageID;
275  FT_UShort nameID;
276  FT_UShort stringLength;
277  FT_ULong stringOffset;
278 
279  /* this last field is not defined in the spec */
280  /* but used by the FreeType engine */
281 
282  FT_Byte* string;
283 
284  } TT_NameRec, *TT_Name;
285 
286 
287  /*************************************************************************/
288  /* */
289  /* <Struct> */
290  /* TT_LangTagRec */
291  /* */
292  /* <Description> */
293  /* A structure modeling language tag records in SFNT `name' tables, */
294  /* introduced in OpenType version 1.6. */
295  /* */
296  /* <Fields> */
297  /* stringLength :: The length of the string in bytes. */
298  /* */
299  /* stringOffset :: The offset to the string in the `name' table. */
300  /* */
301  /* string :: A pointer to the string's bytes. Note that these */
302  /* are UTF-16BE encoded characters. */
303  /* */
304  typedef struct TT_LangTagRec_
305  {
306  FT_UShort stringLength;
307  FT_ULong stringOffset;
308 
309  /* this last field is not defined in the spec */
310  /* but used by the FreeType engine */
311 
312  FT_Byte* string;
313 
314  } TT_LangTagRec, *TT_LangTag;
315 
316 
317  /*************************************************************************/
318  /* */
319  /* <Struct> */
320  /* TT_NameTableRec */
321  /* */
322  /* <Description> */
323  /* A structure modeling the TrueType name table. */
324  /* */
325  /* <Fields> */
326  /* format :: The format of the name table. */
327  /* */
328  /* numNameRecords :: The number of names in table. */
329  /* */
330  /* storageOffset :: The offset of the name table in the `name' */
331  /* TrueType table. */
332  /* */
333  /* names :: An array of name records. */
334  /* */
335  /* numLangTagRecords :: The number of language tags in table. */
336  /* */
337  /* langTags :: An array of language tag records. */
338  /* */
339  /* stream :: The file's input stream. */
340  /* */
341  typedef struct TT_NameTableRec_
342  {
343  FT_UShort format;
344  FT_UInt numNameRecords;
345  FT_UInt storageOffset;
346  TT_NameRec* names;
347  FT_UInt numLangTagRecords;
348  TT_LangTagRec* langTags;
349  FT_Stream stream;
350 
351  } TT_NameTableRec, *TT_NameTable;
352 
353 
354  /*************************************************************************/
355  /*************************************************************************/
356  /*************************************************************************/
357  /*** ***/
358  /*** ***/
359  /*** OPTIONAL TRUETYPE/OPENTYPE TABLES DEFINITIONS ***/
360  /*** ***/
361  /*** ***/
362  /*************************************************************************/
363  /*************************************************************************/
364  /*************************************************************************/
365 
366 
367  /*************************************************************************/
368  /* */
369  /* <Struct> */
370  /* TT_GaspRangeRec */
371  /* */
372  /* <Description> */
373  /* A tiny structure used to model a gasp range according to the */
374  /* TrueType specification. */
375  /* */
376  /* <Fields> */
377  /* maxPPEM :: The maximum ppem value to which `gaspFlag' applies. */
378  /* */
379  /* gaspFlag :: A flag describing the grid-fitting and anti-aliasing */
380  /* modes to be used. */
381  /* */
382  typedef struct TT_GaspRangeRec_
383  {
384  FT_UShort maxPPEM;
385  FT_UShort gaspFlag;
386 
387  } TT_GaspRangeRec, *TT_GaspRange;
388 
389 
390 #define TT_GASP_GRIDFIT 0x01
391 #define TT_GASP_DOGRAY 0x02
392 
393 
394  /*************************************************************************/
395  /* */
396  /* <Struct> */
397  /* TT_GaspRec */
398  /* */
399  /* <Description> */
400  /* A structure modeling the TrueType `gasp' table used to specify */
401  /* grid-fitting and anti-aliasing behaviour. */
402  /* */
403  /* <Fields> */
404  /* version :: The version number. */
405  /* */
406  /* numRanges :: The number of gasp ranges in table. */
407  /* */
408  /* gaspRanges :: An array of gasp ranges. */
409  /* */
410  typedef struct TT_Gasp_
411  {
412  FT_UShort version;
413  FT_UShort numRanges;
414  TT_GaspRange gaspRanges;
415 
416  } TT_GaspRec;
417 
418 
419  /*************************************************************************/
420  /*************************************************************************/
421  /*************************************************************************/
422  /*** ***/
423  /*** ***/
424  /*** EMBEDDED BITMAPS SUPPORT ***/
425  /*** ***/
426  /*** ***/
427  /*************************************************************************/
428  /*************************************************************************/
429  /*************************************************************************/
430 
431 
432  /*************************************************************************/
433  /* */
434  /* <Struct> */
435  /* TT_SBit_MetricsRec */
436  /* */
437  /* <Description> */
438  /* A structure used to hold the big metrics of a given glyph bitmap */
439  /* in a TrueType or OpenType font. These are usually found in the */
440  /* `EBDT' (Microsoft) or `bloc' (Apple) table. */
441  /* */
442  /* <Fields> */
443  /* height :: The glyph height in pixels. */
444  /* */
445  /* width :: The glyph width in pixels. */
446  /* */
447  /* horiBearingX :: The horizontal left bearing. */
448  /* */
449  /* horiBearingY :: The horizontal top bearing. */
450  /* */
451  /* horiAdvance :: The horizontal advance. */
452  /* */
453  /* vertBearingX :: The vertical left bearing. */
454  /* */
455  /* vertBearingY :: The vertical top bearing. */
456  /* */
457  /* vertAdvance :: The vertical advance. */
458  /* */
459  typedef struct TT_SBit_MetricsRec_
460  {
461  FT_UShort height;
462  FT_UShort width;
463 
464  FT_Short horiBearingX;
465  FT_Short horiBearingY;
466  FT_UShort horiAdvance;
467 
468  FT_Short vertBearingX;
469  FT_Short vertBearingY;
470  FT_UShort vertAdvance;
471 
472  } TT_SBit_MetricsRec, *TT_SBit_Metrics;
473 
474 
475  /*************************************************************************/
476  /* */
477  /* <Struct> */
478  /* TT_SBit_SmallMetricsRec */
479  /* */
480  /* <Description> */
481  /* A structure used to hold the small metrics of a given glyph bitmap */
482  /* in a TrueType or OpenType font. These are usually found in the */
483  /* `EBDT' (Microsoft) or the `bdat' (Apple) table. */
484  /* */
485  /* <Fields> */
486  /* height :: The glyph height in pixels. */
487  /* */
488  /* width :: The glyph width in pixels. */
489  /* */
490  /* bearingX :: The left-side bearing. */
491  /* */
492  /* bearingY :: The top-side bearing. */
493  /* */
494  /* advance :: The advance width or height. */
495  /* */
496  typedef struct TT_SBit_Small_Metrics_
497  {
498  FT_Byte height;
499  FT_Byte width;
500 
501  FT_Char bearingX;
502  FT_Char bearingY;
503  FT_Byte advance;
504 
505  } TT_SBit_SmallMetricsRec, *TT_SBit_SmallMetrics;
506 
507 
508  /*************************************************************************/
509  /* */
510  /* <Struct> */
511  /* TT_SBit_LineMetricsRec */
512  /* */
513  /* <Description> */
514  /* A structure used to describe the text line metrics of a given */
515  /* bitmap strike, for either a horizontal or vertical layout. */
516  /* */
517  /* <Fields> */
518  /* ascender :: The ascender in pixels. */
519  /* */
520  /* descender :: The descender in pixels. */
521  /* */
522  /* max_width :: The maximum glyph width in pixels. */
523  /* */
524  /* caret_slope_enumerator :: Rise of the caret slope, typically set */
525  /* to 1 for non-italic fonts. */
526  /* */
527  /* caret_slope_denominator :: Rise of the caret slope, typically set */
528  /* to 0 for non-italic fonts. */
529  /* */
530  /* caret_offset :: Offset in pixels to move the caret for */
531  /* proper positioning. */
532  /* */
533  /* min_origin_SB :: Minimum of horiBearingX (resp. */
534  /* vertBearingY). */
535  /* min_advance_SB :: Minimum of */
536  /* */
537  /* horizontal advance - */
538  /* ( horiBearingX + width ) */
539  /* */
540  /* resp. */
541  /* */
542  /* vertical advance - */
543  /* ( vertBearingY + height ) */
544  /* */
545  /* max_before_BL :: Maximum of horiBearingY (resp. */
546  /* vertBearingY). */
547  /* */
548  /* min_after_BL :: Minimum of */
549  /* */
550  /* horiBearingY - height */
551  /* */
552  /* resp. */
553  /* */
554  /* vertBearingX - width */
555  /* */
556  /* pads :: Unused (to make the size of the record */
557  /* a multiple of 32 bits. */
558  /* */
559  typedef struct TT_SBit_LineMetricsRec_
560  {
561  FT_Char ascender;
562  FT_Char descender;
563  FT_Byte max_width;
564  FT_Char caret_slope_numerator;
565  FT_Char caret_slope_denominator;
566  FT_Char caret_offset;
567  FT_Char min_origin_SB;
568  FT_Char min_advance_SB;
569  FT_Char max_before_BL;
570  FT_Char min_after_BL;
571  FT_Char pads[2];
572 
573  } TT_SBit_LineMetricsRec, *TT_SBit_LineMetrics;
574 
575 
576  /*************************************************************************/
577  /* */
578  /* <Struct> */
579  /* TT_SBit_RangeRec */
580  /* */
581  /* <Description> */
582  /* A TrueType/OpenType subIndexTable as defined in the `EBLC' */
583  /* (Microsoft) or `bloc' (Apple) tables. */
584  /* */
585  /* <Fields> */
586  /* first_glyph :: The first glyph index in the range. */
587  /* */
588  /* last_glyph :: The last glyph index in the range. */
589  /* */
590  /* index_format :: The format of index table. Valid values are 1 */
591  /* to 5. */
592  /* */
593  /* image_format :: The format of `EBDT' image data. */
594  /* */
595  /* image_offset :: The offset to image data in `EBDT'. */
596  /* */
597  /* image_size :: For index formats 2 and 5. This is the size in */
598  /* bytes of each glyph bitmap. */
599  /* */
600  /* big_metrics :: For index formats 2 and 5. This is the big */
601  /* metrics for each glyph bitmap. */
602  /* */
603  /* num_glyphs :: For index formats 4 and 5. This is the number of */
604  /* glyphs in the code array. */
605  /* */
606  /* glyph_offsets :: For index formats 1 and 3. */
607  /* */
608  /* glyph_codes :: For index formats 4 and 5. */
609  /* */
610  /* table_offset :: The offset of the index table in the `EBLC' */
611  /* table. Only used during strike loading. */
612  /* */
613  typedef struct TT_SBit_RangeRec_
614  {
615  FT_UShort first_glyph;
616  FT_UShort last_glyph;
617 
618  FT_UShort index_format;
619  FT_UShort image_format;
620  FT_ULong image_offset;
621 
622  FT_ULong image_size;
623  TT_SBit_MetricsRec metrics;
624  FT_ULong num_glyphs;
625 
626  FT_ULong* glyph_offsets;
627  FT_UShort* glyph_codes;
628 
629  FT_ULong table_offset;
630 
631  } TT_SBit_RangeRec, *TT_SBit_Range;
632 
633 
634  /*************************************************************************/
635  /* */
636  /* <Struct> */
637  /* TT_SBit_StrikeRec */
638  /* */
639  /* <Description> */
640  /* A structure used describe a given bitmap strike in the `EBLC' */
641  /* (Microsoft) or `bloc' (Apple) tables. */
642  /* */
643  /* <Fields> */
644  /* num_index_ranges :: The number of index ranges. */
645  /* */
646  /* index_ranges :: An array of glyph index ranges. */
647  /* */
648  /* color_ref :: Unused. `color_ref' is put in for future */
649  /* enhancements, but these fields are already */
650  /* in use by other platforms (e.g. Newton). */
651  /* For details, please see */
652  /* */
653  /* https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6bloc.html */
654  /* */
655  /* hori :: The line metrics for horizontal layouts. */
656  /* */
657  /* vert :: The line metrics for vertical layouts. */
658  /* */
659  /* start_glyph :: The lowest glyph index for this strike. */
660  /* */
661  /* end_glyph :: The highest glyph index for this strike. */
662  /* */
663  /* x_ppem :: The number of horizontal pixels per EM. */
664  /* */
665  /* y_ppem :: The number of vertical pixels per EM. */
666  /* */
667  /* bit_depth :: The bit depth. Valid values are 1, 2, 4, */
668  /* and 8. */
669  /* */
670  /* flags :: Is this a vertical or horizontal strike? For */
671  /* details, please see */
672  /* */
673  /* https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6bloc.html */
674  /* */
675  typedef struct TT_SBit_StrikeRec_
676  {
677  FT_Int num_ranges;
678  TT_SBit_Range sbit_ranges;
679  FT_ULong ranges_offset;
680 
681  FT_ULong color_ref;
682 
683  TT_SBit_LineMetricsRec hori;
684  TT_SBit_LineMetricsRec vert;
685 
686  FT_UShort start_glyph;
687  FT_UShort end_glyph;
688 
689  FT_Byte x_ppem;
690  FT_Byte y_ppem;
691 
692  FT_Byte bit_depth;
693  FT_Char flags;
694 
695  } TT_SBit_StrikeRec, *TT_SBit_Strike;
696 
697 
698  /*************************************************************************/
699  /* */
700  /* <Struct> */
701  /* TT_SBit_ComponentRec */
702  /* */
703  /* <Description> */
704  /* A simple structure to describe a compound sbit element. */
705  /* */
706  /* <Fields> */
707  /* glyph_code :: The element's glyph index. */
708  /* */
709  /* x_offset :: The element's left bearing. */
710  /* */
711  /* y_offset :: The element's top bearing. */
712  /* */
713  typedef struct TT_SBit_ComponentRec_
714  {
715  FT_UShort glyph_code;
716  FT_Char x_offset;
717  FT_Char y_offset;
718 
719  } TT_SBit_ComponentRec, *TT_SBit_Component;
720 
721 
722  /*************************************************************************/
723  /* */
724  /* <Struct> */
725  /* TT_SBit_ScaleRec */
726  /* */
727  /* <Description> */
728  /* A structure used describe a given bitmap scaling table, as defined */
729  /* in the `EBSC' table. */
730  /* */
731  /* <Fields> */
732  /* hori :: The horizontal line metrics. */
733  /* */
734  /* vert :: The vertical line metrics. */
735  /* */
736  /* x_ppem :: The number of horizontal pixels per EM. */
737  /* */
738  /* y_ppem :: The number of vertical pixels per EM. */
739  /* */
740  /* x_ppem_substitute :: Substitution x_ppem value. */
741  /* */
742  /* y_ppem_substitute :: Substitution y_ppem value. */
743  /* */
744  typedef struct TT_SBit_ScaleRec_
745  {
746  TT_SBit_LineMetricsRec hori;
747  TT_SBit_LineMetricsRec vert;
748 
749  FT_Byte x_ppem;
750  FT_Byte y_ppem;
751 
752  FT_Byte x_ppem_substitute;
753  FT_Byte y_ppem_substitute;
754 
755  } TT_SBit_ScaleRec, *TT_SBit_Scale;
756 
757 
758  /*************************************************************************/
759  /*************************************************************************/
760  /*************************************************************************/
761  /*** ***/
762  /*** ***/
763  /*** POSTSCRIPT GLYPH NAMES SUPPORT ***/
764  /*** ***/
765  /*** ***/
766  /*************************************************************************/
767  /*************************************************************************/
768  /*************************************************************************/
769 
770 
771  /*************************************************************************/
772  /* */
773  /* <Struct> */
774  /* TT_Post_20Rec */
775  /* */
776  /* <Description> */
777  /* Postscript names sub-table, format 2.0. Stores the PS name of */
778  /* each glyph in the font face. */
779  /* */
780  /* <Fields> */
781  /* num_glyphs :: The number of named glyphs in the table. */
782  /* */
783  /* num_names :: The number of PS names stored in the table. */
784  /* */
785  /* glyph_indices :: The indices of the glyphs in the names arrays. */
786  /* */
787  /* glyph_names :: The PS names not in Mac Encoding. */
788  /* */
789  typedef struct TT_Post_20Rec_
790  {
791  FT_UShort num_glyphs;
792  FT_UShort num_names;
793  FT_UShort* glyph_indices;
794  FT_Char** glyph_names;
795 
796  } TT_Post_20Rec, *TT_Post_20;
797 
798 
799  /*************************************************************************/
800  /* */
801  /* <Struct> */
802  /* TT_Post_25Rec */
803  /* */
804  /* <Description> */
805  /* Postscript names sub-table, format 2.5. Stores the PS name of */
806  /* each glyph in the font face. */
807  /* */
808  /* <Fields> */
809  /* num_glyphs :: The number of glyphs in the table. */
810  /* */
811  /* offsets :: An array of signed offsets in a normal Mac */
812  /* Postscript name encoding. */
813  /* */
814  typedef struct TT_Post_25_
815  {
816  FT_UShort num_glyphs;
817  FT_Char* offsets;
818 
819  } TT_Post_25Rec, *TT_Post_25;
820 
821 
822  /*************************************************************************/
823  /* */
824  /* <Struct> */
825  /* TT_Post_NamesRec */
826  /* */
827  /* <Description> */
828  /* Postscript names table, either format 2.0 or 2.5. */
829  /* */
830  /* <Fields> */
831  /* loaded :: A flag to indicate whether the PS names are loaded. */
832  /* */
833  /* format_20 :: The sub-table used for format 2.0. */
834  /* */
835  /* format_25 :: The sub-table used for format 2.5. */
836  /* */
837  typedef struct TT_Post_NamesRec_
838  {
839  FT_Bool loaded;
840 
841  union
842  {
843  TT_Post_20Rec format_20;
844  TT_Post_25Rec format_25;
845 
846  } names;
847 
848  } TT_Post_NamesRec, *TT_Post_Names;
849 
850 
851  /*************************************************************************/
852  /*************************************************************************/
853  /*************************************************************************/
854  /*** ***/
855  /*** ***/
856  /*** GX VARIATION TABLE SUPPORT ***/
857  /*** ***/
858  /*** ***/
859  /*************************************************************************/
860  /*************************************************************************/
861  /*************************************************************************/
862 
863 
864 #ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT
865  typedef struct GX_BlendRec_ *GX_Blend;
866 #endif
867 
868  /*************************************************************************/
869  /*************************************************************************/
870  /*************************************************************************/
871  /*** ***/
872  /*** ***/
873  /*** EMBEDDED BDF PROPERTIES TABLE SUPPORT ***/
874  /*** ***/
875  /*** ***/
876  /*************************************************************************/
877  /*************************************************************************/
878  /*************************************************************************/
879 
880  /*
881  * These types are used to support a `BDF ' table that isn't part of the
882  * official TrueType specification. It is mainly used in SFNT-based
883  * bitmap fonts that were generated from a set of BDF fonts.
884  *
885  * The format of the table is as follows.
886  *
887  * USHORT version `BDF ' table version number, should be 0x0001.
888  * USHORT strikeCount Number of strikes (bitmap sizes) in this table.
889  * ULONG stringTable Offset (from start of BDF table) to string
890  * table.
891  *
892  * This is followed by an array of `strikeCount' descriptors, having the
893  * following format.
894  *
895  * USHORT ppem Vertical pixels per EM for this strike.
896  * USHORT numItems Number of items for this strike (properties and
897  * atoms). Maximum is 255.
898  *
899  * This array in turn is followed by `strikeCount' value sets. Each
900  * `value set' is an array of `numItems' items with the following format.
901  *
902  * ULONG item_name Offset in string table to item name.
903  * USHORT item_type The item type. Possible values are
904  * 0 => string (e.g., COMMENT)
905  * 1 => atom (e.g., FONT or even SIZE)
906  * 2 => int32
907  * 3 => uint32
908  * 0x10 => A flag to indicate a properties. This
909  * is ORed with the above values.
910  * ULONG item_value For strings => Offset into string table without
911  * the corresponding double quotes.
912  * For atoms => Offset into string table.
913  * For integers => Direct value.
914  *
915  * All strings in the string table consist of bytes and are
916  * zero-terminated.
917  *
918  */
919 
920 #ifdef TT_CONFIG_OPTION_BDF
921 
922  typedef struct TT_BDFRec_
923  {
924  FT_Byte* table;
925  FT_Byte* table_end;
926  FT_Byte* strings;
927  FT_ULong strings_size;
928  FT_UInt num_strikes;
929  FT_Bool loaded;
930 
931  } TT_BDFRec, *TT_BDF;
932 
933 #endif /* TT_CONFIG_OPTION_BDF */
934 
935  /*************************************************************************/
936  /*************************************************************************/
937  /*************************************************************************/
938  /*** ***/
939  /*** ***/
940  /*** ORIGINAL TT_FACE CLASS DEFINITION ***/
941  /*** ***/
942  /*** ***/
943  /*************************************************************************/
944  /*************************************************************************/
945  /*************************************************************************/
946 
947 
948  /*************************************************************************/
949  /* */
950  /* This structure/class is defined here because it is common to the */
951  /* following formats: TTF, OpenType-TT, and OpenType-CFF. */
952  /* */
953  /* Note, however, that the classes TT_Size and TT_GlyphSlot are not */
954  /* shared between font drivers, and are thus defined in `ttobjs.h'. */
955  /* */
956  /*************************************************************************/
957 
958 
959  /*************************************************************************/
960  /* */
961  /* <Type> */
962  /* TT_Face */
963  /* */
964  /* <Description> */
965  /* A handle to a TrueType face/font object. A TT_Face encapsulates */
966  /* the resolution and scaling independent parts of a TrueType font */
967  /* resource. */
968  /* */
969  /* <Note> */
970  /* The TT_Face structure is also used as a `parent class' for the */
971  /* OpenType-CFF class (T2_Face). */
972  /* */
973  typedef struct TT_FaceRec_* TT_Face;
974 
975 
976  /* a function type used for the truetype bytecode interpreter hooks */
977  typedef FT_Error
978  (*TT_Interpreter)( void* exec_context );
979 
980  /* forward declaration */
981  typedef struct TT_LoaderRec_* TT_Loader;
982 
983 
984  /*************************************************************************/
985  /* */
986  /* <FuncType> */
987  /* TT_Loader_GotoTableFunc */
988  /* */
989  /* <Description> */
990  /* Seeks a stream to the start of a given TrueType table. */
991  /* */
992  /* <Input> */
993  /* face :: A handle to the target face object. */
994  /* */
995  /* tag :: A 4-byte tag used to name the table. */
996  /* */
997  /* stream :: The input stream. */
998  /* */
999  /* <Output> */
1000  /* length :: The length of the table in bytes. Set to 0 if not */
1001  /* needed. */
1002  /* */
1003  /* <Return> */
1004  /* FreeType error code. 0 means success. */
1005  /* */
1006  /* <Note> */
1007  /* The stream cursor must be at the font file's origin. */
1008  /* */
1009  typedef FT_Error
1010  (*TT_Loader_GotoTableFunc)( TT_Face face,
1011  FT_ULong tag,
1012  FT_Stream stream,
1013  FT_ULong* length );
1014 
1015 
1016  /*************************************************************************/
1017  /* */
1018  /* <FuncType> */
1019  /* TT_Loader_StartGlyphFunc */
1020  /* */
1021  /* <Description> */
1022  /* Seeks a stream to the start of a given glyph element, and opens a */
1023  /* frame for it. */
1024  /* */
1025  /* <Input> */
1026  /* loader :: The current TrueType glyph loader object. */
1027  /* */
1028  /* glyph index :: The index of the glyph to access. */
1029  /* */
1030  /* offset :: The offset of the glyph according to the */
1031  /* `locations' table. */
1032  /* */
1033  /* byte_count :: The size of the frame in bytes. */
1034  /* */
1035  /* <Return> */
1036  /* FreeType error code. 0 means success. */
1037  /* */
1038  /* <Note> */
1039  /* This function is normally equivalent to FT_STREAM_SEEK(offset) */
1040  /* followed by FT_FRAME_ENTER(byte_count) with the loader's stream, */
1041  /* but alternative formats (e.g. compressed ones) might use something */
1042  /* different. */
1043  /* */
1044  typedef FT_Error
1045  (*TT_Loader_StartGlyphFunc)( TT_Loader loader,
1046  FT_UInt glyph_index,
1047  FT_ULong offset,
1048  FT_UInt byte_count );
1049 
1050 
1051  /*************************************************************************/
1052  /* */
1053  /* <FuncType> */
1054  /* TT_Loader_ReadGlyphFunc */
1055  /* */
1056  /* <Description> */
1057  /* Reads one glyph element (its header, a simple glyph, or a */
1058  /* composite) from the loader's current stream frame. */
1059  /* */
1060  /* <Input> */
1061  /* loader :: The current TrueType glyph loader object. */
1062  /* */
1063  /* <Return> */
1064  /* FreeType error code. 0 means success. */
1065  /* */
1066  typedef FT_Error
1067  (*TT_Loader_ReadGlyphFunc)( TT_Loader loader );
1068 
1069 
1070  /*************************************************************************/
1071  /* */
1072  /* <FuncType> */
1073  /* TT_Loader_EndGlyphFunc */
1074  /* */
1075  /* <Description> */
1076  /* Closes the current loader stream frame for the glyph. */
1077  /* */
1078  /* <Input> */
1079  /* loader :: The current TrueType glyph loader object. */
1080  /* */
1081  typedef void
1082  (*TT_Loader_EndGlyphFunc)( TT_Loader loader );
1083 
1084 
1085  typedef enum TT_SbitTableType_
1086  {
1087  TT_SBIT_TABLE_TYPE_NONE = 0,
1088  TT_SBIT_TABLE_TYPE_EBLC, /* `EBLC' (Microsoft), */
1089  /* `bloc' (Apple) */
1090  TT_SBIT_TABLE_TYPE_CBLC, /* `CBLC' (Google) */
1091  TT_SBIT_TABLE_TYPE_SBIX, /* `sbix' (Apple) */
1092 
1093  /* do not remove */
1094  TT_SBIT_TABLE_TYPE_MAX
1095 
1096  } TT_SbitTableType;
1097 
1098 
1099  /* OpenType 1.8 brings new tables for variation font support; */
1100  /* to make the old MM and GX fonts still work we need to check */
1101  /* the presence (and validity) of the functionality provided */
1102  /* by those tables. The following flag macros are for the */
1103  /* field `variation_support'. */
1104  /* */
1105  /* Note that `fvar' gets checked immediately at font loading, */
1106  /* while the other features are only loaded if MM support is */
1107  /* actually requested. */
1108 
1109  /* FVAR */
1110 #define TT_FACE_FLAG_VAR_FVAR ( 1 << 0 )
1111 
1112  /* HVAR */
1113 #define TT_FACE_FLAG_VAR_HADVANCE ( 1 << 1 )
1114 #define TT_FACE_FLAG_VAR_LSB ( 1 << 2 )
1115 #define TT_FACE_FLAG_VAR_RSB ( 1 << 3 )
1116 
1117  /* VVAR */
1118 #define TT_FACE_FLAG_VAR_VADVANCE ( 1 << 4 )
1119 #define TT_FACE_FLAG_VAR_TSB ( 1 << 5 )
1120 #define TT_FACE_FLAG_VAR_BSB ( 1 << 6 )
1121 #define TT_FACE_FLAG_VAR_VORG ( 1 << 7 )
1122 
1123  /* MVAR */
1124 #define TT_FACE_FLAG_VAR_MVAR ( 1 << 8 )
1125 
1126 
1127  /*************************************************************************/
1128  /* */
1129  /* TrueType Face Type */
1130  /* */
1131  /* <Struct> */
1132  /* TT_Face */
1133  /* */
1134  /* <Description> */
1135  /* The TrueType face class. These objects model the resolution and */
1136  /* point-size independent data found in a TrueType font file. */
1137  /* */
1138  /* <Fields> */
1139  /* root :: The base FT_Face structure, managed by the */
1140  /* base layer. */
1141  /* */
1142  /* ttc_header :: The TrueType collection header, used when */
1143  /* the file is a `ttc' rather than a `ttf'. */
1144  /* For ordinary font files, the field */
1145  /* `ttc_header.count' is set to 0. */
1146  /* */
1147  /* format_tag :: The font format tag. */
1148  /* */
1149  /* num_tables :: The number of TrueType tables in this font */
1150  /* file. */
1151  /* */
1152  /* dir_tables :: The directory of TrueType tables for this */
1153  /* font file. */
1154  /* */
1155  /* header :: The font's font header (`head' table). */
1156  /* Read on font opening. */
1157  /* */
1158  /* horizontal :: The font's horizontal header (`hhea' */
1159  /* table). This field also contains the */
1160  /* associated horizontal metrics table */
1161  /* (`hmtx'). */
1162  /* */
1163  /* max_profile :: The font's maximum profile table. Read on */
1164  /* font opening. Note that some maximum */
1165  /* values cannot be taken directly from this */
1166  /* table. We thus define additional fields */
1167  /* below to hold the computed maxima. */
1168  /* */
1169  /* vertical_info :: A boolean which is set when the font file */
1170  /* contains vertical metrics. If not, the */
1171  /* value of the `vertical' field is */
1172  /* undefined. */
1173  /* */
1174  /* vertical :: The font's vertical header (`vhea' table). */
1175  /* This field also contains the associated */
1176  /* vertical metrics table (`vmtx'), if found. */
1177  /* IMPORTANT: The contents of this field is */
1178  /* undefined if the `vertical_info' field is */
1179  /* unset. */
1180  /* */
1181  /* num_names :: The number of name records within this */
1182  /* TrueType font. */
1183  /* */
1184  /* name_table :: The table of name records (`name'). */
1185  /* */
1186  /* os2 :: The font's OS/2 table (`OS/2'). */
1187  /* */
1188  /* postscript :: The font's PostScript table (`post' */
1189  /* table). The PostScript glyph names are */
1190  /* not loaded by the driver on face opening. */
1191  /* See the `ttpost' module for more details. */
1192  /* */
1193  /* cmap_table :: Address of the face's `cmap' SFNT table */
1194  /* in memory (it's an extracted frame). */
1195  /* */
1196  /* cmap_size :: The size in bytes of the `cmap_table' */
1197  /* described above. */
1198  /* */
1199  /* goto_table :: A function called by each TrueType table */
1200  /* loader to position a stream's cursor to */
1201  /* the start of a given table according to */
1202  /* its tag. It defaults to TT_Goto_Face but */
1203  /* can be different for strange formats (e.g. */
1204  /* Type 42). */
1205  /* */
1206  /* access_glyph_frame :: A function used to access the frame of a */
1207  /* given glyph within the face's font file. */
1208  /* */
1209  /* forget_glyph_frame :: A function used to forget the frame of a */
1210  /* given glyph when all data has been loaded. */
1211  /* */
1212  /* read_glyph_header :: A function used to read a glyph header. */
1213  /* It must be called between an `access' and */
1214  /* `forget'. */
1215  /* */
1216  /* read_simple_glyph :: A function used to read a simple glyph. */
1217  /* It must be called after the header was */
1218  /* read, and before the `forget'. */
1219  /* */
1220  /* read_composite_glyph :: A function used to read a composite glyph. */
1221  /* It must be called after the header was */
1222  /* read, and before the `forget'. */
1223  /* */
1224  /* sfnt :: A pointer to the SFNT service. */
1225  /* */
1226  /* psnames :: A pointer to the PostScript names service. */
1227  /* */
1228  /* mm :: A pointer to the Multiple Masters service. */
1229  /* */
1230  /* var :: A pointer to the Metrics Variations */
1231  /* service. */
1232  /* */
1233  /* hdmx :: The face's horizontal device metrics */
1234  /* (`hdmx' table). This table is optional in */
1235  /* TrueType/OpenType fonts. */
1236  /* */
1237  /* gasp :: The grid-fitting and scaling properties */
1238  /* table (`gasp'). This table is optional in */
1239  /* TrueType/OpenType fonts. */
1240  /* */
1241  /* pclt :: The `pclt' SFNT table. */
1242  /* */
1243  /* num_sbit_scales :: The number of sbit scales for this font. */
1244  /* */
1245  /* sbit_scales :: Array of sbit scales embedded in this */
1246  /* font. This table is optional in a */
1247  /* TrueType/OpenType font. */
1248  /* */
1249  /* postscript_names :: A table used to store the Postscript names */
1250  /* of the glyphs for this font. See the */
1251  /* file `ttconfig.h' for comments on the */
1252  /* TT_CONFIG_OPTION_POSTSCRIPT_NAMES option. */
1253  /* */
1254  /* font_program_size :: Size in bytecodes of the face's font */
1255  /* program. 0 if none defined. Ignored for */
1256  /* Type 2 fonts. */
1257  /* */
1258  /* font_program :: The face's font program (bytecode stream) */
1259  /* executed at load time, also used during */
1260  /* glyph rendering. Comes from the `fpgm' */
1261  /* table. Ignored for Type 2 font fonts. */
1262  /* */
1263  /* cvt_program_size :: The size in bytecodes of the face's cvt */
1264  /* program. Ignored for Type 2 fonts. */
1265  /* */
1266  /* cvt_program :: The face's cvt program (bytecode stream) */
1267  /* executed each time an instance/size is */
1268  /* changed/reset. Comes from the `prep' */
1269  /* table. Ignored for Type 2 fonts. */
1270  /* */
1271  /* cvt_size :: Size of the control value table (in */
1272  /* entries). Ignored for Type 2 fonts. */
1273  /* */
1274  /* cvt :: The face's original control value table. */
1275  /* Coordinates are expressed in unscaled font */
1276  /* units. Comes from the `cvt ' table. */
1277  /* Ignored for Type 2 fonts. */
1278  /* */
1279  /* interpreter :: A pointer to the TrueType bytecode */
1280  /* interpreters field is also used to hook */
1281  /* the debugger in `ttdebug'. */
1282  /* */
1283  /* extra :: Reserved for third-party font drivers. */
1284  /* */
1285  /* postscript_name :: The PS name of the font. Used by the */
1286  /* postscript name service. */
1287  /* */
1288  /* glyf_len :: The length of the `glyf' table. Needed */
1289  /* for malformed `loca' tables. */
1290  /* */
1291  /* glyf_offset :: The file offset of the `glyf' table. */
1292  /* */
1293  /* is_cff2 :: Set if the font format is CFF2. */
1294  /* */
1295  /* doblend :: A boolean which is set if the font should */
1296  /* be blended (this is for GX var). */
1297  /* */
1298  /* blend :: Contains the data needed to control GX */
1299  /* variation tables (rather like Multiple */
1300  /* Master data). */
1301  /* */
1302  /* variation_support :: Flags that indicate which OpenType */
1303  /* functionality related to font variation */
1304  /* support is present, valid, and usable. */
1305  /* For example, TT_FACE_FLAG_VAR_FVAR is only */
1306  /* set if we have at least one design axis. */
1307  /* */
1308  /* var_postscript_prefix :: */
1309  /* The PostScript name prefix needed for */
1310  /* constructing a variation font instance's */
1311  /* PS name . */
1312  /* */
1313  /* var_postscript_prefix_len :: */
1314  /* The length of the `var_postscript_prefix' */
1315  /* string. */
1316  /* */
1317  /* horz_metrics_size :: The size of the `hmtx' table. */
1318  /* */
1319  /* vert_metrics_size :: The size of the `vmtx' table. */
1320  /* */
1321  /* num_locations :: The number of glyph locations in this */
1322  /* TrueType file. This should be */
1323  /* identical to the number of glyphs. */
1324  /* Ignored for Type 2 fonts. */
1325  /* */
1326  /* glyph_locations :: An array of longs. These are offsets to */
1327  /* glyph data within the `glyf' table. */
1328  /* Ignored for Type 2 font faces. */
1329  /* */
1330  /* hdmx_table :: A pointer to the `hdmx' table. */
1331  /* */
1332  /* hdmx_table_size :: The size of the `hdmx' table. */
1333  /* */
1334  /* hdmx_record_count :: The number of hdmx records. */
1335  /* */
1336  /* hdmx_record_size :: The size of a single hdmx record. */
1337  /* */
1338  /* hdmx_record_sizes :: An array holding the ppem sizes available */
1339  /* in the `hdmx' table. */
1340  /* */
1341  /* sbit_table :: A pointer to the font's embedded bitmap */
1342  /* location table. */
1343  /* */
1344  /* sbit_table_size :: The size of `sbit_table'. */
1345  /* */
1346  /* sbit_table_type :: The sbit table type (CBLC, sbix, etc.). */
1347  /* */
1348  /* sbit_num_strikes :: The number of sbit strikes exposed by */
1349  /* FreeType's API, omitting invalid strikes. */
1350  /* */
1351  /* sbit_strike_map :: A mapping between the strike indices */
1352  /* exposed by the API and the indices used in */
1353  /* the font's sbit table. */
1354  /* */
1355  /* kern_table :: A pointer to the `kern' table. */
1356  /* */
1357  /* kern_table_size :: The size of the `kern' table. */
1358  /* */
1359  /* num_kern_tables :: The number of supported kern subtables */
1360  /* (up to 32; FreeType recognizes only */
1361  /* horizontal ones with format 0). */
1362  /* */
1363  /* kern_avail_bits :: The availability status of kern subtables; */
1364  /* if bit n is set, table n is available. */
1365  /* */
1366  /* kern_order_bits :: The sortedness status of kern subtables; */
1367  /* if bit n is set, table n is sorted. */
1368  /* */
1369  /* bdf :: Data related to an SFNT font's `bdf' */
1370  /* table; see `tttypes.h'. */
1371  /* */
1372  /* horz_metrics_offset :: The file offset of the `hmtx' table. */
1373  /* */
1374  /* vert_metrics_offset :: The file offset of the `vmtx' table. */
1375  /* */
1376  /* sph_found_func_flags :: Flags identifying special bytecode */
1377  /* functions (used by the v38 implementation */
1378  /* of the bytecode interpreter). */
1379  /* */
1380  /* sph_compatibility_mode :: */
1381  /* This flag is set if we are in ClearType */
1382  /* backward compatibility mode (used by the */
1383  /* v38 implementation of the bytecode */
1384  /* interpreter). */
1385  /* */
1386  /* ebdt_start :: The file offset of the sbit data table */
1387  /* (CBDT, bdat, etc.). */
1388  /* */
1389  /* ebdt_size :: The size of the sbit data table. */
1390  /* */
1391  typedef struct TT_FaceRec_
1392  {
1393  FT_FaceRec root;
1394 
1395  TTC_HeaderRec ttc_header;
1396 
1397  FT_ULong format_tag;
1398  FT_UShort num_tables;
1399  TT_Table dir_tables;
1400 
1401  TT_Header header; /* TrueType header table */
1402  TT_HoriHeader horizontal; /* TrueType horizontal header */
1403 
1404  TT_MaxProfile max_profile;
1405 
1406  FT_Bool vertical_info;
1407  TT_VertHeader vertical; /* TT Vertical header, if present */
1408 
1409  FT_UShort num_names; /* number of name records */
1410  TT_NameTableRec name_table; /* name table */
1411 
1412  TT_OS2 os2; /* TrueType OS/2 table */
1413  TT_Postscript postscript; /* TrueType Postscript table */
1414 
1415  FT_Byte* cmap_table; /* extracted `cmap' table */
1416  FT_ULong cmap_size;
1417 
1418  TT_Loader_GotoTableFunc goto_table;
1419 
1420  TT_Loader_StartGlyphFunc access_glyph_frame;
1421  TT_Loader_EndGlyphFunc forget_glyph_frame;
1422  TT_Loader_ReadGlyphFunc read_glyph_header;
1423  TT_Loader_ReadGlyphFunc read_simple_glyph;
1424  TT_Loader_ReadGlyphFunc read_composite_glyph;
1425 
1426  /* a typeless pointer to the SFNT_Interface table used to load */
1427  /* the basic TrueType tables in the face object */
1428  void* sfnt;
1429 
1430  /* a typeless pointer to the FT_Service_PsCMapsRec table used to */
1431  /* handle glyph names <-> unicode & Mac values */
1432  void* psnames;
1433 
1434 #ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT
1435  /* a typeless pointer to the FT_Service_MultiMasters table used to */
1436  /* handle variation fonts */
1437  void* mm;
1438 
1439  /* a typeless pointer to the FT_Service_MetricsVariationsRec table */
1440  /* used to handle the HVAR, VVAR, and MVAR OpenType tables */
1441  void* var;
1442 #endif
1443 
1444  /* a typeless pointer to the PostScript Aux service */
1445  void* psaux;
1446 
1447 
1448  /***********************************************************************/
1449  /* */
1450  /* Optional TrueType/OpenType tables */
1451  /* */
1452  /***********************************************************************/
1453 
1454  /* grid-fitting and scaling table */
1455  TT_GaspRec gasp; /* the `gasp' table */
1456 
1457  /* PCL 5 table */
1458  TT_PCLT pclt;
1459 
1460  /* embedded bitmaps support */
1461  FT_ULong num_sbit_scales;
1462  TT_SBit_Scale sbit_scales;
1463 
1464  /* postscript names table */
1465  TT_Post_NamesRec postscript_names;
1466 
1467 
1468  /***********************************************************************/
1469  /* */
1470  /* TrueType-specific fields (ignored by the CFF driver) */
1471  /* */
1472  /***********************************************************************/
1473 
1474  /* the font program, if any */
1475  FT_ULong font_program_size;
1476  FT_Byte* font_program;
1477 
1478  /* the cvt program, if any */
1479  FT_ULong cvt_program_size;
1480  FT_Byte* cvt_program;
1481 
1482  /* the original, unscaled, control value table */
1483  FT_ULong cvt_size;
1484  FT_Short* cvt;
1485 
1486  /* A pointer to the bytecode interpreter to use. This is also */
1487  /* used to hook the debugger for the `ttdebug' utility. */
1488  TT_Interpreter interpreter;
1489 
1490 
1491  /***********************************************************************/
1492  /* */
1493  /* Other tables or fields. This is used by derivative formats like */
1494  /* OpenType. */
1495  /* */
1496  /***********************************************************************/
1497 
1498  FT_Generic extra;
1499 
1500  const char* postscript_name;
1501 
1502  FT_ULong glyf_len;
1503  FT_ULong glyf_offset; /* since 2.7.1 */
1504 
1505  FT_Bool is_cff2; /* since 2.7.1 */
1506 
1507 #ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT
1508  FT_Bool doblend;
1509  GX_Blend blend;
1510 
1511  FT_UInt32 variation_support; /* since 2.7.1 */
1512 
1513  const char* var_postscript_prefix; /* since 2.7.2 */
1514  FT_UInt var_postscript_prefix_len; /* since 2.7.2 */
1515 
1516 #endif
1517 
1518  /* since version 2.2 */
1519 
1520  FT_ULong horz_metrics_size;
1521  FT_ULong vert_metrics_size;
1522 
1523  FT_ULong num_locations; /* in broken TTF, gid > 0xFFFF */
1524  FT_Byte* glyph_locations;
1525 
1526  FT_Byte* hdmx_table;
1527  FT_ULong hdmx_table_size;
1528  FT_UInt hdmx_record_count;
1529  FT_ULong hdmx_record_size;
1530  FT_Byte* hdmx_record_sizes;
1531 
1532  FT_Byte* sbit_table;
1533  FT_ULong sbit_table_size;
1534  TT_SbitTableType sbit_table_type;
1535  FT_UInt sbit_num_strikes;
1536  FT_UInt* sbit_strike_map;
1537 
1538  FT_Byte* kern_table;
1539  FT_ULong kern_table_size;
1540  FT_UInt num_kern_tables;
1541  FT_UInt32 kern_avail_bits;
1542  FT_UInt32 kern_order_bits;
1543 
1544 #ifdef TT_CONFIG_OPTION_BDF
1545  TT_BDFRec bdf;
1546 #endif /* TT_CONFIG_OPTION_BDF */
1547 
1548  /* since 2.3.0 */
1549  FT_ULong horz_metrics_offset;
1550  FT_ULong vert_metrics_offset;
1551 
1552 #ifdef TT_SUPPORT_SUBPIXEL_HINTING_INFINALITY
1553  /* since 2.4.12 */
1554  FT_ULong sph_found_func_flags; /* special functions found */
1555  /* for this face */
1556  FT_Bool sph_compatibility_mode;
1557 #endif /* TT_SUPPORT_SUBPIXEL_HINTING_INFINALITY */
1558 
1559 #ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
1560  /* since 2.7 */
1561  FT_ULong ebdt_start; /* either `CBDT', `EBDT', or `bdat' */
1562  FT_ULong ebdt_size;
1563 #endif
1564 
1565  } TT_FaceRec;
1566 
1567 
1568  /*************************************************************************/
1569  /* */
1570  /* <Struct> */
1571  /* TT_GlyphZoneRec */
1572  /* */
1573  /* <Description> */
1574  /* A glyph zone is used to load, scale and hint glyph outline */
1575  /* coordinates. */
1576  /* */
1577  /* <Fields> */
1578  /* memory :: A handle to the memory manager. */
1579  /* */
1580  /* max_points :: The maximum size in points of the zone. */
1581  /* */
1582  /* max_contours :: Max size in links contours of the zone. */
1583  /* */
1584  /* n_points :: The current number of points in the zone. */
1585  /* */
1586  /* n_contours :: The current number of contours in the zone. */
1587  /* */
1588  /* org :: The original glyph coordinates (font */
1589  /* units/scaled). */
1590  /* */
1591  /* cur :: The current glyph coordinates (scaled/hinted). */
1592  /* */
1593  /* tags :: The point control tags. */
1594  /* */
1595  /* contours :: The contours end points. */
1596  /* */
1597  /* first_point :: Offset of the current subglyph's first point. */
1598  /* */
1599  typedef struct TT_GlyphZoneRec_
1600  {
1601  FT_Memory memory;
1602  FT_UShort max_points;
1603  FT_Short max_contours;
1604  FT_UShort n_points; /* number of points in zone */
1605  FT_Short n_contours; /* number of contours */
1606 
1607  FT_Vector* org; /* original point coordinates */
1608  FT_Vector* cur; /* current point coordinates */
1609  FT_Vector* orus; /* original (unscaled) point coordinates */
1610 
1611  FT_Byte* tags; /* current touch flags */
1612  FT_UShort* contours; /* contour end points */
1613 
1614  FT_UShort first_point; /* offset of first (#0) point */
1615 
1616  } TT_GlyphZoneRec, *TT_GlyphZone;
1617 
1618 
1619  /* handle to execution context */
1620  typedef struct TT_ExecContextRec_* TT_ExecContext;
1621 
1622 
1623  /*************************************************************************/
1624  /* */
1625  /* <Type> */
1626  /* TT_Size */
1627  /* */
1628  /* <Description> */
1629  /* A handle to a TrueType size object. */
1630  /* */
1631  typedef struct TT_SizeRec_* TT_Size;
1632 
1633 
1634  /* glyph loader structure */
1635  typedef struct TT_LoaderRec_
1636  {
1637  TT_Face face;
1638  TT_Size size;
1639  FT_GlyphSlot glyph;
1640  FT_GlyphLoader gloader;
1641 
1642  FT_ULong load_flags;
1643  FT_UInt glyph_index;
1644 
1645  FT_Stream stream;
1646  FT_Int byte_len;
1647 
1648  FT_Short n_contours;
1649  FT_BBox bbox;
1650  FT_Int left_bearing;
1651  FT_Int advance;
1652  FT_Int linear;
1653  FT_Bool linear_def;
1654  FT_Vector pp1;
1655  FT_Vector pp2;
1656 
1657  /* the zone where we load our glyphs */
1658  TT_GlyphZoneRec base;
1659  TT_GlyphZoneRec zone;
1660 
1661  TT_ExecContext exec;
1662  FT_Byte* instructions;
1663  FT_ULong ins_pos;
1664 
1665  /* for possible extensibility in other formats */
1666  void* other;
1667 
1668  /* since version 2.1.8 */
1669  FT_Int top_bearing;
1670  FT_Int vadvance;
1671  FT_Vector pp3;
1672  FT_Vector pp4;
1673 
1674  /* since version 2.2.1 */
1675  FT_Byte* cursor;
1676  FT_Byte* limit;
1677 
1678  /* since version 2.6.2 */
1679  FT_ListRec composites;
1680 
1681  } TT_LoaderRec;
1682 
1683 
1684 FT_END_HEADER
1685 
1686 #endif /* TTTYPES_H_ */
1687 
1688 
1689 /* END */
WOFF_HeaderRec_::privLength
FT_ULong privLength
Definition: tttypes.h:167
TT_SBit_Strike
struct TT_SBit_StrikeRec_ * TT_SBit_Strike
TT_SBit_LineMetricsRec_::min_origin_SB
FT_Char min_origin_SB
Definition: tttypes.h:567
TT_Size
struct TT_SizeRec_ * TT_Size
Definition: tttypes.h:1631
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FT_UShort numRanges
Definition: tttypes.h:413
TT_FaceRec_::cvt_size
FT_ULong cvt_size
Definition: tttypes.h:1483
TT_Post_20Rec_::glyph_indices
FT_UShort * glyph_indices
Definition: tttypes.h:793
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FT_ULong privOffset
Definition: tttypes.h:166
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FT_Stream stream
Definition: tttypes.h:349
TT_Post_20
struct TT_Post_20Rec_ * TT_Post_20
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Definition: tttypes.h:1670
TT_SBit_LineMetricsRec_::caret_slope_numerator
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Definition: tttypes.h:564
TT_SBit_Metrics
struct TT_SBit_MetricsRec_ * TT_SBit_Metrics
FT_Error
int FT_Error
Definition: fttypes.h:300
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FT_Char max_before_BL
Definition: tttypes.h:569
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FT_Byte * string
Definition: tttypes.h:312
TT_LangTagRec
struct TT_LangTagRec_ TT_LangTagRec
TT_SBit_MetricsRec_::height
FT_UShort height
Definition: tttypes.h:461
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FT_Bool vertical_info
Definition: tttypes.h:1406
TT_SBit_ComponentRec_
Definition: tttypes.h:713
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FT_Vector pp4
Definition: tttypes.h:1672
TT_Post_25Rec
struct TT_Post_25_ TT_Post_25Rec
TT_Header
FT_BEGIN_HEADER struct TT_Header_ TT_Header
TT_FaceRec_::vertical
TT_VertHeader vertical
Definition: tttypes.h:1407
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FT_Short n_contours
Definition: tttypes.h:1605
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FT_Byte * cvt_program
Definition: tttypes.h:1480
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TT_SbitTableType_
Definition: tttypes.h:1085
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signed long FT_Long
Definition: fttypes.h:242
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Definition: tttypes.h:1412
TT_ExecContextRec_
Definition: ttinterp.h:149
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Definition: tttypes.h:272
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Definition: tttypes.h:683
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struct TT_NameTableRec_ * TT_NameTable
TT_Loader_EndGlyphFunc
void(* TT_Loader_EndGlyphFunc)(TT_Loader loader)
Definition: tttypes.h:1082
SFNT_HeaderRec_
Definition: tttypes.h:99
TT_SBit_Small_Metrics_
Definition: tttypes.h:496
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unsigned long FT_ULong
Definition: fttypes.h:253
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Definition: tttypes.h:470
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TT_Loader_GotoTableFunc goto_table
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struct png_info_def **typedef void(__cdecl typeof(png_destroy_read_struct))(struct png_struct_def **
Definition: typeof.h:49
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Definition: tttypes.h:307
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TT_SBit_LineMetricsRec vert
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Definition: tttypes.h:1484
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Definition: tttypes.h:681
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Definition: tttypes.h:74
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Definition: tttypes.h:1550
TT_Post_20Rec_
Definition: tttypes.h:789
TT_OS2_
Definition: tttables.h:380
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struct TT_GlyphZoneRec_ TT_GlyphZoneRec
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Definition: tttypes.h:160
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#define FT_END_HEADER
Definition: ftheader.h:54
WOFF_HeaderRec_
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Definition: tttypes.h:410
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Definition: tttypes.h:1524
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Definition: tttypes.h:1669
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signed int FT_Int
Definition: fttypes.h:220
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Definition: tttypes.h:1675
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Definition: tttypes.h:1010
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Definition: glext.h:5920
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Definition: tttypes.h:981
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GLenum GLsizei GLenum GLenum const GLvoid * table
Definition: glext.h:5644
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Definition: fttypes.h:143
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Definition: tttypes.h:161
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Definition: tttypes.h:274
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Definition: tttypes.h:277
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Definition: tttypes.h:468
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Definition: tttypes.h:348
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Definition: fttypes.h:108
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Definition: tttypes.h:282
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Definition: tttypes.h:1432
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Definition: tttypes.h:240
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TT_LongMetricsRec_
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Definition: tttypes.h:689
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Definition: fttypes.h:154
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TT_Loader_ReadGlyphFunc read_simple_glyph
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Definition: tttypes.h:1599
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#define FT_BEGIN_HEADER
Definition: ftheader.h:36
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Definition: tttypes.h:75
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Definition: tttypes.h:620
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Definition: tttypes.h:165
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struct TT_FaceRec_ * TT_Face
Definition: tttypes.h:973
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Definition: tttypes.h:135
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Definition: tttypes.h:1608
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TT_NameTableRec_
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Definition: tttypes.h:198
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Definition: glext.h:5579
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Definition: tttypes.h:1401
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Definition: freetype.h:1068
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Definition: tttypes.h:624
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Definition: tttypes.h:200
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Definition: tttypes.h:1653
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Definition: tttypes.h:103
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Definition: tttypes.h:70
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Definition: main.c:59