1 /* m17n-flt.c -- Font Layout Table sub-module.
2 Copyright (C) 2003, 2004, 2007, 2008, 2009, 2010
3 National Institute of Advanced Industrial Science and Technology (AIST)
4 Registration Number H15PRO112
6 This file is part of the m17n library.
8 The m17n library is free software; you can redistribute it and/or
9 modify it under the terms of the GNU Lesser General Public License
10 as published by the Free Software Foundation; either version 2.1 of
11 the License, or (at your option) any later version.
13 The m17n library is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public
19 License along with the m17n library; if not, write to the Free
20 Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
25 @brief FLT support for a window system.
27 This section defines the m17n FLT API concerning character
28 layouting facility using FLT (Font Layout Table). The format of
29 FLT is described in @ref mdbFLT. */
33 @brief ¥¦¥£¥ó¥É¥¦¥·¥¹¥Æ¥à¤Î¤¿¤á¤Î FLT ¥µ¥Ý¡¼¥È.
35 ¤³¤Î¥»¥¯¥·¥ç¥ó¤Ç¤Ï¡¢FLT (Font Layout Table)
36 ¤òÍѤ¤¤¿Ê¸»ú¥ì¥¤¥¢¥¦¥Èµ¡Ç½¤Ë´Ø¤¹¤ë m17n FLT API ¤òÄêµÁ¤¹¤ë¡£
37 FLT ¤Î·Á¼°¤Ï @ref mdbFLT ¤Ëµ½Ò¤µ¤ì¤Æ¤¤¤ë¡£ */
41 #if !defined (FOR_DOXYGEN) || defined (DOXYGEN_INTERNAL_MODULE)
42 /*** @addtogroup m17nInternal
51 #include <sys/types.h>
54 #include "m17n-core.h"
56 #include "m17n-misc.h"
62 #include "internal-flt.h"
66 /* Font Layout Table (FLT)
68 Predefined terms: SYMBOL, INTEGER, STRING
70 FLT ::= '(' STAGE + ')'
72 STAGE ::= CATEGORY-TABLE ? FONT-LAYOUT-RULE
74 ;; Each STAGE consumes a source (code sequence) and produces another
75 ;; code sequence that is given to the next STAGE as a source. The
76 ;; source given to the first stage is a sequence of character codes
77 ;; that are assigned category codes by CATEGORY-TABLE. The output of
78 ;; the last stage is a glyph code sequence given to the renderer.
81 '(' 'category' CATEGORY-SPEC + ')'
83 '(' CODE [ CODE ] CATEGORY ')'
86 ;; ASCII character codes of alphabet ('A' .. 'Z' 'a' .. 'z').
89 ;; (0x0900 0x097F ?E) ; All Devanagari characters
90 ;; (0x093C ?N)) ; DEVANAGARI-LETTER NUKTA
91 ;; Assign the category 'E' to all Devanagari characters but 0x093C,
92 ;; assign the category 'N' to 0x093C.
95 '(' 'generator' RULE MACRO-DEF * ')'
97 RULE ::= COMMAND | REGEXP-RULE | MATCH-RULE | MAP-RULE
98 | COND-STRUCT | MACRO-NAME
101 DIRECT-CODE | COMBINING | PREDEFIND-COMMAND | OTF-COMMAND
103 DIRECT-CODE ::= INTEGER
104 ;; Always succeed. Produce the code. Consume no source.
106 PREDEFIND-COMMAND ::=
107 '=' | '*' | '<' | '>' | '|'
109 ;; '=': Succeed when the current run contains at least one code.
110 ;; Consume the first code in the current run, and produce it as is.
112 ;; '*': If the the previous command succeeded, repeat it until it
115 ;; '<': Produce a special code that indicates the start of grapheme
116 ;; cluster. Succeed always, consume nothing.
118 ;; '>': Produce a special code that indicates the end of grapheme
119 ;; cluster. Succeed always, consume nothing.
121 ;; '|': Produce a special code whose category is ' '. Succeed always,
125 ':otf=''SCRIPT'[':'['LANGSYS'][':'[GSUB-FEATURES][':'GPOS-FEATURES]]]
126 ;; Run the Open Type Layout Table on the current run. Succeed always,
127 ;; consume all glyphs in the current range.
130 ;; OTF's ScriptTag name (four letters) listed at:
131 ;; <http://www.microsoft.om/typograph/otspec/scripttags.htm>
133 ;; OTF's Language System name (four letters) listed at:
134 ;; <http://www.microsoft.om/typograph/otspec/languagetags.htm>
136 GSUB-FEATURES ::= [FEATURE[,FEATURE]*] | ' '
137 GPOS-FEATURES ::= [FEATURE[,FEATURE]*] | ' '
139 ;; OTF's Feature name (four letters) listed at:
140 ;; <http://www.microsoft.om/typograph/otspec/???.htm>
142 OTF-TAG ::= PRINTABLE-CHAR PRINTABLE-CHAR PRINTABLE-CHAR PRINTABLE-CHAR
146 ;; Run all features in the default langsys of 'deva' script.
147 ;; 'otf:deva::nukt:haln'
148 ;; Run all GSUB features, run 'nukt' and 'haln' GPOS features.
150 ;; Run all GSUB features, run no GPOS features.
153 '(' REGEXP RULE * ')'
155 ;; Succeed if REGXP matches the head of source. Run RULEs while
156 ;; limiting the source to the matching part. Consume that part.
159 ;; Must be composed only from ASCII characters. 'A' - 'Z', 'a' - 'z'
160 ;; correspond to CATEGORY.
167 '(' MATCH-IDX RULE * ')'
169 ;; Succeed if the previous REGEXP-RULE found a matching part for
170 ;; MATCH-IDX. Run RULEs while limiting the source to the matching
171 ;; part. If MATCH-IDX is zero, consume the whole part, else consume
174 MATCH-IDX ::= INTEGER
181 '(' ( SOURCE-SEQ | SOURCE-RANGE ) RULE * ')'
183 ;; Succeed if the source matches SOURCE-SEQ or SOURCE-RANGE. Run
184 ;; RULEs while limiting the source to the matching part. Consume that
190 '(' 'range' CODE CODE ')'
192 ;; ((0x0915 0x094D) 0x43)
193 ;; If the source code sequence is 0x0915 0x094D, produce 0x43.
194 ;; ((range 0x0F40 0x0F6A) 0x2221)
195 ;; If the first source code CODE is in the range 0x0F40..0x0F6A,
196 ;; produce (0x2221 + (CODE - 0x0F40)).
199 '(' 'cond' RULE + ')'
201 ;; Try each rule in sequence until one succeeds. Succeed if one
202 ;; succeeds. Consume nothing.
206 ;; ((0x0915 0x094D) 0x43)
207 ;; ((range 0x0F40 0x0F6A) 0x2221)
210 COMBINING ::= 'V''H''O''V''H'
211 V ::= ( 't' | 'c' | 'b' | 'B' )
212 H ::= ( 'l' | 'c' | 'r' )
213 O ::= ( '.' | XOFF | YOFF | XOFF YOFF )
214 XOFF ::= '<'INTEGER | '>'INTEGER
215 YOFF ::= '+'INTEGER | '-'INTEGER
216 ;; INTEGER must be integer 0..127
218 ;; VH pair indicates 12 reference points of a glyph as below:
220 ;; 0----1----2 <---- ascent 0:tl (top-left)
221 ;; | | 1:tc (top-center)
222 ;; | | 2:tr (top-right)
223 ;; | | 3:Bl (base-left)
224 ;; 9 10 11 <---- center 4:Bc (base-center)
225 ;; | | 5:Br (base-right)
226 ;; --3----4----5-- <-- baseline 6:bl (bottom-left)
227 ;; | | 7:bc (bottom-center)
228 ;; 6----7----8 <---- descent 8:br (bottom-right)
229 ;; 9:cl (center-left)
230 ;; | | | 10:cc (center-center)
231 ;; left center right 11:cr (center-right)
235 ;; Align top-left point of the previous glyph and bottom-center
236 ;; point of the current glyph.
238 ;; Align 20% left and 10% below of base-left point of the previous
239 ;; glyph and base-right point of the current glyph.
242 '(' MACRO-NAME RULE + ')'
243 MACRO-NAME ::= SYMBOL
247 static int mdebug_flag = MDEBUG_FLT;
249 MSymbol Mfont, Mlayouter, Mcombining;
251 static MSymbol Mgenerator, Mend;
253 static MPlist *flt_list;
254 static int flt_min_coverage, flt_max_coverage;
258 CategoryCodeMask = 0x7F,
259 CombiningCodeMask = 0xFFFFFF,
260 CombinedMask = 1 << 27,
261 LeftPaddingMask = 1 << 28,
262 RightPaddingMask = 1 << 29
265 #define SET_GLYPH_INFO(g, mask, ctx, info) \
266 ((g)->internal = (((g)->internal & ~(mask)) | (info)), \
267 (ctx)->check_mask |= (mask))
269 #define GET_CATEGORY_CODE(g) ((g)->internal & CategoryCodeMask)
270 #define SET_CATEGORY_CODE(g, code) \
271 ((g)->internal = (((g)->internal & ~(CombiningCodeMask | CombinedMask)) \
273 #define GET_COMBINED(g) ((g)->internal & CombinedMask)
274 #define GET_COMBINING_CODE(g) ((g)->internal & CombiningCodeMask)
275 #define SET_COMBINING_CODE(g, ctx, code) \
276 SET_GLYPH_INFO (g, CombiningCodeMask | CombinedMask, ctx, \
277 (code) | CombinedMask)
278 #define GET_LEFT_PADDING(g) ((g)->internal & LeftPaddingMask)
279 #define SET_LEFT_PADDING(g, ctx, flag) \
280 SET_GLYPH_INFO (g, LeftPaddingMask, ctx, flag)
281 #define GET_RIGHT_PADDING(g) ((g)->internal & RightPaddingMask)
282 #define SET_RIGHT_PADDING(g, ctx, flag) \
283 SET_GLYPH_INFO (g, RightPaddingMask, ctx, flag)
284 #define GET_ENCODED(g) ((g)->encoded)
285 #define SET_ENCODED(g, flag) ((g)->encoded = (flag))
286 #define GET_MEASURED(g) ((g)->measured)
287 #define SET_MEASURED(g, flag) ((g)->measured = (flag))
289 #define GINIT(gstring, n) \
291 if (! (gstring)->glyph_size) \
292 (gstring)->glyph_size = sizeof (MFLTGlyph); \
293 (gstring)->glyphs = alloca ((gstring)->glyph_size * (n)); \
294 (gstring)->allocated = (n); \
295 (gstring)->used = 0; \
298 #define GALLOCA (gstring) \
299 ((MFLTGlyph *) alloca ((gstring)->glyph_size))
301 #define GREF(gstring, idx) \
302 ((MFLTGlyph *) ((char *) ((gstring)->glyphs) + (gstring)->glyph_size * (idx)))
304 #define PREV(gstring, g) \
305 ((MFLTGlyph *) ((char *) (g) - (gstring)->glyph_size))
307 #define NEXT(gstring, g) \
308 ((MFLTGlyph *) ((char *) (g) + (gstring)->glyph_size))
310 #define GCPY(src, src_idx, n, tgt, tgt_idx) \
312 memcpy ((char *) ((tgt)->glyphs) + (tgt)->glyph_size * (tgt_idx), \
313 (char *) ((src)->glyphs) + (src)->glyph_size * (src_idx), \
314 (src)->glyph_size * (n)); \
317 #define GDUP(ctx, idx) \
319 MFLTGlyphString *src = (ctx)->in; \
320 MFLTGlyphString *tgt = (ctx)->out; \
321 if (tgt->allocated <= tgt->used) \
323 GCPY (src, (idx), 1, tgt, tgt->used); \
328 GREPLACE (MFLTGlyphString *src, int src_from, int src_to,
329 MFLTGlyphString *tgt, int tgt_from, int tgt_to)
331 int src_len = src_to - src_from;
332 int tgt_len = tgt_to - tgt_from;
333 int inc = src_len - tgt_len;
335 if (tgt->allocated < tgt->used + inc)
337 if (inc != 0 && tgt_to < tgt->used)
338 memmove ((char *) tgt->glyphs + tgt->glyph_size * (tgt_from + src_len),
339 (char *) tgt->glyphs + tgt->glyph_size * tgt_to,
340 tgt->glyph_size * (tgt->used - tgt_to));
342 memcpy ((char *) tgt->glyphs + tgt->glyph_size * tgt_from,
343 (char *) src->glyphs + src->glyph_size * src_from,
344 src->glyph_size * src_len);
353 -0x0F .. -2 : builtin commands
354 -0x100000F .. -0x10 : combining code
355 ... -0x1000010: index to FontLayoutStage->cmds
358 #define INVALID_CMD_ID -1
359 #define CMD_ID_OFFSET_BUILTIN -3
360 #define CMD_ID_OFFSET_COMBINING -0x10
361 #define CMD_ID_OFFSET_INDEX -0x1000010
363 /* Builtin commands. */
364 #define CMD_ID_COPY -3 /* '=' */
365 #define CMD_ID_REPEAT -4 /* '*' */
366 #define CMD_ID_CLUSTER_BEGIN -5 /* '<' */
367 #define CMD_ID_CLUSTER_END -6 /* '>' */
368 #define CMD_ID_SEPARATOR -7 /* '|' */
369 #define CMD_ID_LEFT_PADDING -8 /* '[' */
370 #define CMD_ID_RIGHT_PADDING -9 /* ']' */
372 #define CMD_ID_TO_COMBINING_CODE(id) (CMD_ID_OFFSET_COMBINING - (id))
373 #define COMBINING_CODE_TO_CMD_ID(code) (CMD_ID_OFFSET_COMBINING - (code))
375 #define CMD_ID_TO_INDEX(id) (CMD_ID_OFFSET_INDEX - (id))
376 #define INDEX_TO_CMD_ID(idx) (CMD_ID_OFFSET_INDEX - (idx))
378 static MSymbol Mcond, Mrange, Mfont_facility, Mequal;
380 #define GLYPH_CODE_P(code) \
381 ((code) >= GLYPH_CODE_MIN && (code) <= GLYPH_CODE_MAX)
383 #define GLYPH_CODE_INDEX(code) ((code) - GLYPH_CODE_MIN)
385 #define UPDATE_CLUSTER_RANGE(ctx, g) \
387 if (ctx->cluster_begin_pos > (g)->from) \
388 ctx->cluster_begin_pos = (g)->from; \
389 if (ctx->cluster_end_pos < (g)->to) \
390 ctx->cluster_end_pos = (g)->to; \
393 enum FontLayoutCmdRuleSrcType
405 enum FontLayoutCmdRuleSrcType src_type;
422 MFLTOtfSpec otf_spec;
432 /* Beginning and end indices of series of SEQ commands. */
433 int seq_beg, seq_end;
434 /* Range of the first character appears in the above series. */
435 int seq_from, seq_to;
441 enum FontLayoutCmdType
443 FontLayoutCmdTypeRule,
444 FontLayoutCmdTypeCond,
445 FontLayoutCmdTypeOTF,
446 FontLayoutCmdTypeOTFCategory,
452 enum FontLayoutCmdType type;
454 FontLayoutCmdRule rule;
455 FontLayoutCmdCond cond;
470 FeatureCodeTable feature_table;
471 /* Non-null if the table must be re-configured by OTF specs included
472 in the definition. */
474 } FontLayoutCategory;
478 FontLayoutCategory *category;
490 FontLayoutCategory *coverage;
493 /* Font for which coverage or some of categories are configured. */
497 /* Font layout table loader */
499 static int parse_otf_command (MSymbol symbol, MFLTOtfSpec *spec);
502 apply_otf_feature (MFLTFont *font, MFLTOtfSpec *spec,
503 int from, int to, MCharTable *table, int category)
508 if (! mflt_iterate_otf_feature)
510 buf = alloca (to + 1 - from);
511 memset (buf, 0, to + 1 - from);
512 if (mflt_iterate_otf_feature (font, spec, from, to, buf) < 0)
514 for (i = to - from; i >= 0; i--)
516 mchartable_set (table, from + i, (void *) category);
519 static unsigned int gen_otf_tag (char *p, int shift);
521 /* Load a category table from PLIST. PLIST has this form:
522 PLIST ::= ( FROM-CODE TO-CODE ? CATEGORY-CHAR ) *
525 static FontLayoutCategory *
526 load_category_table (MPlist *plist, MFLTFont *font)
528 FontLayoutCategory *category;
530 MPlist *feature_table_head = NULL;
531 int feature_table_size = 0;
535 table = mchartable (Minteger, (void *) 0);
539 int from, to, category_code;
541 if (! MPLIST_PLIST_P (p))
542 MERROR_GOTO (MERROR_FLT, end);
543 elt = MPLIST_PLIST (p);
544 if (MPLIST_SYMBOL_P (elt))
548 if (! mflt_enable_new_feature)
550 M17N_OBJECT_UNREF (table);
553 next = MPLIST_NEXT (elt);
554 if (! MPLIST_INTEGER_P (next))
555 MERROR_GOTO (MERROR_FLT, end);
556 if (! feature_table_head)
557 feature_table_head = p;
558 feature_table_size++;
561 if (! MPLIST_INTEGER_P (elt))
562 MERROR_GOTO (MERROR_FLT, end);
563 from = MPLIST_INTEGER (elt);
564 elt = MPLIST_NEXT (elt);
565 if (! MPLIST_INTEGER_P (elt))
566 MERROR_GOTO (MERROR_FLT, end);
567 to = MPLIST_INTEGER (elt);
568 elt = MPLIST_NEXT (elt);
569 if (MPLIST_TAIL_P (elt))
574 else if (MPLIST_SYMBOL_P (elt))
576 if (! mflt_enable_new_feature)
578 M17N_OBJECT_UNREF (table);
584 if (parse_otf_command (MPLIST_SYMBOL (elt), &spec) < 0)
585 MERROR_GOTO (MERROR_FLT, end);
586 elt = MPLIST_NEXT (elt);
587 if (! MPLIST_INTEGER_P (elt))
588 MERROR_GOTO (MERROR_FLT, end);
589 category_code = MPLIST_INTEGER (elt);
590 if (! isalnum (category_code))
591 MERROR_GOTO (MERROR_FLT, end);
592 apply_otf_feature (font, &spec, from, to, table, category_code);
600 if (! MPLIST_INTEGER_P (elt))
601 MERROR_GOTO (MERROR_FLT, end);
602 category_code = MPLIST_INTEGER (elt);
604 if (! isalnum (category_code))
605 MERROR_GOTO (MERROR_FLT, end);
608 mchartable_set (table, from, (void *) category_code);
610 mchartable_set_range (table, from, to, (void *) category_code);
614 category = calloc (1, sizeof (FontLayoutCategory));
615 category->table = table;
618 category->definition = plist;
619 M17N_OBJECT_REF (plist);
622 category->definition = NULL;
623 if (feature_table_head)
626 category->feature_table.size = feature_table_size;
627 category->feature_table.tag = malloc (sizeof (unsigned int)
628 * feature_table_size);
629 category->feature_table.code = malloc (feature_table_size);
631 MPLIST_DO (p, feature_table_head)
635 if (! MPLIST_PLIST_P (p))
637 elt = MPLIST_PLIST (p);
638 if (! MPLIST_SYMBOL_P (elt))
640 feature = MPLIST_SYMBOL (elt);
641 elt = MPLIST_NEXT (elt);
642 if (! MPLIST_INTEGER_P (elt))
644 category->feature_table.tag[i]
645 = gen_otf_tag (MSYMBOL_NAME (feature), 7);
646 category->feature_table.code[i] = MPLIST_INTEGER (elt);
653 #define ref_category_table(CATEGORY) M17N_OBJECT_REF ((CATEGORY)->table)
656 unref_category_table (FontLayoutCategory *category)
658 M17N_OBJECT_UNREF (category->table);
659 if (! category->table)
661 if (category->definition)
662 M17N_OBJECT_UNREF (category->definition);
663 if (category->feature_table.size > 0)
665 free (category->feature_table.tag);
666 free (category->feature_table.code);
673 gen_otf_tag (char *p, int shift)
675 unsigned int tag = 0;
678 for (i = 0; i < 4 && *p; i++, p++)
679 tag = (tag << shift) | *p;
681 tag = (tag << shift) | 0x20;
686 otf_count_features (char *p, char *end, char stopper, int *count)
691 if (*p != stopper && *p != '\0')
698 if (*p == stopper || *p == '\0')
712 if (*p == stopper || *p == '\0')
724 otf_store_features (char *p, char *end, unsigned *buf)
729 for (i = 0; p < end;)
732 buf[i++] = 0xFFFFFFFF, p += 2, negative = 1;
736 buf[i++] = 0xFFFFFFFF;
737 buf[i++] = gen_otf_tag (p + 1, 8), p += 6;
740 buf[i++] = gen_otf_tag (p, 8), p += 5;
746 parse_otf_command (MSymbol symbol, MFLTOtfSpec *spec)
748 char *str = MSYMBOL_NAME (symbol);
749 char *end = str + MSYMBOL_NAMELEN (symbol);
750 unsigned int script, langsys;
752 int gsub_count = 0, gpos_count = 0;
755 memset (spec, 0, sizeof (MFLTOtfSpec));
758 str += 5; /* skip the heading ":otf=" or ":otf?" */
761 if (! mflt_enable_new_feature)
762 /* The client can't use this command. */
765 /* This is a spec to reset category codes. */
768 script = gen_otf_tag (str, 8);
772 langsys = gen_otf_tag (str, 8);
779 /* Apply all GSUB features. */
784 str = otf_count_features (p, end, '+', &gsub_count);
786 MERROR (MERROR_FLT, -1);
790 /* Apply all GPOS features. */
795 str = otf_count_features (p, end, '\0', &gpos_count);
797 MERROR (MERROR_FLT, -1);
800 spec->script = script;
801 spec->langsys = langsys;
804 spec->features[0] = malloc (sizeof (int) * (gsub_count + 1));
805 if (! spec->features[0])
808 otf_store_features (gsub + 1, gpos, spec->features[0]);
810 spec->features[0][0] = 0xFFFFFFFF, spec->features[0][1] = 0;
814 spec->features[1] = malloc (sizeof (int) * (gpos_count + 1));
815 if (! spec->features[1])
817 if (spec->features[0])
818 free (spec->features[0]);
822 otf_store_features (gpos + 1, str, spec->features[1]);
824 spec->features[1][0] = 0xFFFFFFFF, spec->features[1][1] = 0;
830 /* Parse OTF command name NAME and store the result in CMD.
832 :SCRIPT[/[LANGSYS][=[GSUB-FEATURES][+GPOS-FEATURES]]]
833 where GSUB-FEATURES and GPOS-FEATURES have this form:
834 [FEATURE[,FEATURE]*] | ' ' */
837 load_otf_command (FontLayoutCmd *cmd, MSymbol sym)
839 char *name = MSYMBOL_NAME (sym);
844 /* This is old format of "otf:...". Change it to ":otf=...". */
845 char *str = alloca (MSYMBOL_NAMELEN (sym) + 2);
847 sprintf (str, ":otf=");
848 strcat (str, name + 4);
852 result = parse_otf_command (sym, &cmd->body.otf);
855 cmd->type = (name[4] == '?' ? FontLayoutCmdTypeOTFCategory
856 : FontLayoutCmdTypeOTF);
861 /* Read a decimal number from STR preceded by one of "+-><". '+' and
862 '>' means a plus sign, '-' and '<' means a minus sign. If the
863 number is greater than 127, limit it to 127. */
866 read_decimal_number (char **str)
869 int sign = (*p == '-' || *p == '<') ? -1 : 1;
873 while (*p >= '0' && *p <= '9')
874 n = n * 10 + *p++ - '0';
878 return (n < 127 ? n * sign : 127 * sign);
882 /* Read a horizontal and vertical combining positions from STR, and
883 store them in the place pointed by X and Y. The horizontal
884 position left, center, and right are represented by 0, 1, and 2
885 respectively. The vertical position top, center, bottom, and base
886 are represented by 0, 1, 2, and 3 respectively. If successfully
887 read, return 0, else return -1. */
890 read_combining_position (char *str, int *x, int *y)
895 /* Vertical position comes first. */
896 for (i = 0; i < 4; i++)
905 /* Then comse horizontal position. */
906 for (i = 0; i < 3; i++)
916 /* Return a combining code corresponding to SYM. */
919 get_combining_command (MSymbol sym)
921 char *str = msymbol_name (sym);
922 int base_x, base_y, add_x, add_y, off_x, off_y;
925 if (read_combining_position (str, &base_x, &base_y) < 0)
936 if (c == '+' || c == '-')
938 off_y = read_decimal_number (&str) + 128;
943 if (c == '<' || c == '>')
944 off_x = read_decimal_number (&str) + 128;
948 if (read_combining_position (str, &add_x, &add_y) < 0)
951 c = MAKE_COMBINING_CODE (base_y, base_x, add_y, add_x, off_y, off_x);
952 return (COMBINING_CODE_TO_CMD_ID (c));
956 /* Load a command from PLIST into STAGE, and return that
957 identification number. If ID is not INVALID_CMD_ID, that means we
958 are loading a top level command or a macro. In that case, use ID
959 as the identification number of the command. Otherwise, generate a
960 new id number for the command. MACROS is a list of raw macros. */
963 load_command (FontLayoutStage *stage, MPlist *plist,
964 MPlist *macros, int id)
969 if (MPLIST_INTEGER_P (plist))
971 int code = MPLIST_INTEGER (plist);
974 MERROR (MERROR_DRAW, INVALID_CMD_ID);
977 else if (MPLIST_PLIST_P (plist))
979 /* PLIST ::= ( cond ... ) | ( STRING ... ) | ( INTEGER ... )
980 | ( ( INTEGER INTEGER ) ... )
981 | ( ( range INTEGER INTEGER ) ... )
982 | ( ( SYMBOL STRING ) ... )
983 | ( ( font-facilty [ INTEGER ] ) ... )
984 | ( ( font-facilty OTF-SPEC ) ... ) */
985 MPlist *elt = MPLIST_PLIST (plist);
986 int len = MPLIST_LENGTH (elt) - 1;
989 if (id == INVALID_CMD_ID)
992 id = INDEX_TO_CMD_ID (stage->used);
993 MLIST_APPEND1 (stage, cmds, dummy, MERROR_DRAW);
995 cmd = stage->cmds + CMD_ID_TO_INDEX (id);
997 if (MPLIST_SYMBOL_P (elt))
999 FontLayoutCmdCond *cond;
1001 if (MPLIST_SYMBOL (elt) != Mcond)
1002 MERROR (MERROR_DRAW, INVALID_CMD_ID);
1003 elt = MPLIST_NEXT (elt);
1004 cmd->type = FontLayoutCmdTypeCond;
1005 cond = &cmd->body.cond;
1006 cond->seq_beg = cond->seq_end = -1;
1007 cond->seq_from = cond->seq_to = 0;
1009 MTABLE_CALLOC (cond->cmd_ids, len, MERROR_DRAW);
1010 for (i = 0; i < len; i++, elt = MPLIST_NEXT (elt))
1012 int this_id = load_command (stage, elt, macros, INVALID_CMD_ID);
1014 if (this_id == INVALID_CMD_ID || this_id == -2)
1015 MERROR (MERROR_DRAW, this_id);
1016 /* The above load_command may relocate stage->cmds. */
1017 cmd = stage->cmds + CMD_ID_TO_INDEX (id);
1018 cond = &cmd->body.cond;
1019 cond->cmd_ids[i] = this_id;
1020 if (this_id <= CMD_ID_OFFSET_INDEX)
1022 FontLayoutCmd *this_cmd
1023 = stage->cmds + CMD_ID_TO_INDEX (this_id);
1025 if (this_cmd->type == FontLayoutCmdTypeRule
1026 && this_cmd->body.rule.src_type == SRC_SEQ)
1028 int first_char = this_cmd->body.rule.src.seq.codes[0];
1030 if (cond->seq_beg < 0)
1032 /* The first SEQ command. */
1034 cond->seq_from = cond->seq_to = first_char;
1036 else if (cond->seq_end < 0)
1038 /* The following SEQ command. */
1039 if (cond->seq_from > first_char)
1040 cond->seq_from = first_char;
1041 else if (cond->seq_to < first_char)
1042 cond->seq_to = first_char;
1047 if (cond->seq_beg >= 0 && cond->seq_end < 0)
1048 /* The previous one is the last SEQ command. */
1054 if (cond->seq_beg >= 0 && cond->seq_end < 0)
1055 /* The previous one is the last SEQ command. */
1059 if (cond->seq_beg >= 0 && cond->seq_end < 0)
1060 /* The previous one is the last SEQ command. */
1065 cmd->type = FontLayoutCmdTypeRule;
1066 if (MPLIST_MTEXT_P (elt))
1068 MText *mt = MPLIST_MTEXT (elt);
1069 char *str = (char *) MTEXT_DATA (mt);
1073 mtext_ins_char (mt, 0, '^', 1);
1074 str = (char *) MTEXT_DATA (mt);
1076 if (regcomp (&cmd->body.rule.src.re.preg, str, REG_EXTENDED))
1077 MERROR (MERROR_FONT, INVALID_CMD_ID);
1078 cmd->body.rule.src_type = SRC_REGEX;
1079 cmd->body.rule.src.re.pattern = strdup (str);
1081 else if (MPLIST_INTEGER_P (elt))
1083 cmd->body.rule.src_type = SRC_INDEX;
1084 cmd->body.rule.src.match_idx = MPLIST_INTEGER (elt);
1086 else if (MPLIST_PLIST_P (elt))
1088 MPlist *pl = MPLIST_PLIST (elt), *p;
1089 int size = MPLIST_LENGTH (pl);
1091 if (MPLIST_INTEGER_P (pl))
1095 cmd->body.rule.src_type = SRC_SEQ;
1096 cmd->body.rule.src.seq.n_codes = size;
1097 MTABLE_CALLOC (cmd->body.rule.src.seq.codes, size,
1099 for (i = 0; i < size; i++, pl = MPLIST_NEXT (pl))
1101 if (! MPLIST_INTEGER_P (pl))
1102 MERROR (MERROR_DRAW, INVALID_CMD_ID);
1103 cmd->body.rule.src.seq.codes[i]
1104 = (unsigned) MPLIST_INTEGER (pl);
1107 else if (MPLIST_SYMBOL_P (pl))
1109 if (MPLIST_SYMBOL (pl) == Mrange)
1112 MERROR (MERROR_FLT, INVALID_CMD_ID);
1113 cmd->body.rule.src_type = SRC_RANGE;
1114 pl = MPLIST_NEXT (pl);
1115 if (! MPLIST_INTEGER_P (pl))
1116 MERROR (MERROR_DRAW, INVALID_CMD_ID);
1117 cmd->body.rule.src.range.from
1118 = (unsigned) MPLIST_INTEGER (pl);
1119 pl = MPLIST_NEXT (pl);
1120 if (! MPLIST_INTEGER_P (pl))
1121 MERROR (MERROR_DRAW, INVALID_CMD_ID);
1122 cmd->body.rule.src.range.to
1123 = (unsigned) MPLIST_INTEGER (pl);
1125 else if (MPLIST_SYMBOL (pl) == Mfont_facility)
1127 FontLayoutCmdRule *rule = &cmd->body.rule;
1129 pl = MPLIST_NEXT (pl);
1130 if (MPLIST_SYMBOL_P (pl))
1132 MSymbol sym = MPLIST_SYMBOL (pl);
1133 char *otf_spec = MSYMBOL_NAME (sym);
1135 if (otf_spec[0] == ':' && otf_spec[1] == 'o'
1136 && otf_spec[2] == 't' && otf_spec[3] == 'f')
1137 parse_otf_command (sym, &rule->src.facility.otf_spec);
1139 MERROR (MERROR_FLT, INVALID_CMD_ID);
1140 rule->src_type = SRC_OTF_SPEC;
1141 pl = MPLIST_NEXT (pl);
1143 else if (MPLIST_TAIL_P (pl))
1144 MERROR (MERROR_FLT, INVALID_CMD_ID);
1146 rule->src_type = SRC_HAS_GLYPH;
1147 rule->src.facility.len = 0;
1150 if (! MPLIST_INTEGER_P (p)
1151 && (MPLIST_SYMBOL_P (p)
1152 ? MPLIST_SYMBOL (p) != Mequal
1154 MERROR (MERROR_FLT, INVALID_CMD_ID);
1155 rule->src.facility.len++;
1157 rule->src.facility.codes = pl;
1158 M17N_OBJECT_REF (pl);
1162 MERROR (MERROR_DRAW, INVALID_CMD_ID);
1165 MERROR (MERROR_DRAW, INVALID_CMD_ID);
1167 elt = MPLIST_NEXT (elt);
1168 cmd->body.rule.n_cmds = len;
1169 MTABLE_CALLOC (cmd->body.rule.cmd_ids, len, MERROR_DRAW);
1170 for (i = 0; i < len; i++, elt = MPLIST_NEXT (elt))
1172 int this_id = load_command (stage, elt, macros, INVALID_CMD_ID);
1174 if (this_id == INVALID_CMD_ID || this_id == -2)
1175 MERROR (MERROR_DRAW, this_id);
1176 /* The above load_command may relocate stage->cmds. */
1177 cmd = stage->cmds + CMD_ID_TO_INDEX (id);
1178 cmd->body.rule.cmd_ids[i] = this_id;
1182 else if (MPLIST_SYMBOL_P (plist))
1185 MSymbol sym = MPLIST_SYMBOL (plist);
1186 char *name = msymbol_name (sym);
1187 int len = strlen (name);
1191 && ((name[0] == 'o' && name[1] == 't'
1192 && name[2] == 'f' && name[3] == ':')
1193 || (name[0] == ':' && name[1] == 'o' && name[2] == 't'
1194 && name[3] == 'f' && (name[4] == '=' || name[4] == '?'))))
1196 result = load_otf_command (&cmd, sym);
1199 if (id == INVALID_CMD_ID)
1201 id = INDEX_TO_CMD_ID (stage->used);
1202 MLIST_APPEND1 (stage, cmds, cmd, MERROR_DRAW);
1205 stage->cmds[CMD_ID_TO_INDEX (id)] = cmd;
1213 else if (*name == '*')
1214 return CMD_ID_REPEAT;
1215 else if (*name == '<')
1216 return CMD_ID_CLUSTER_BEGIN;
1217 else if (*name == '>')
1218 return CMD_ID_CLUSTER_END;
1219 else if (*name == '|')
1220 return CMD_ID_SEPARATOR;
1221 else if (*name == '[')
1222 return CMD_ID_LEFT_PADDING;
1223 else if (*name == ']')
1224 return CMD_ID_RIGHT_PADDING;
1230 id = get_combining_command (sym);
1236 MPLIST_DO (elt, macros)
1238 if (sym == MPLIST_SYMBOL (MPLIST_PLIST (elt)))
1240 id = INDEX_TO_CMD_ID (i);
1241 if (stage->cmds[i].type == FontLayoutCmdTypeMAX)
1242 id = load_command (stage, MPLIST_NEXT (MPLIST_PLIST (elt)),
1248 MERROR (MERROR_DRAW, INVALID_CMD_ID);
1251 MERROR (MERROR_DRAW, INVALID_CMD_ID);
1257 free_flt_command (FontLayoutCmd *cmd)
1259 if (cmd->type == FontLayoutCmdTypeRule)
1261 FontLayoutCmdRule *rule = &cmd->body.rule;
1263 if (rule->src_type == SRC_REGEX)
1265 free (rule->src.re.pattern);
1266 regfree (&rule->src.re.preg);
1268 else if (rule->src_type == SRC_SEQ)
1269 free (rule->src.seq.codes);
1270 free (rule->cmd_ids);
1272 else if (cmd->type == FontLayoutCmdTypeCond)
1273 free (cmd->body.cond.cmd_ids);
1274 else if (cmd->type == FontLayoutCmdTypeOTF
1275 || cmd->type == FontLayoutCmdTypeOTFCategory)
1277 if (cmd->body.otf.features[0])
1278 free (cmd->body.otf.features[0]);
1279 if (cmd->body.otf.features[1])
1280 free (cmd->body.otf.features[1]);
1284 /* Load a generator from PLIST into a newly allocated FontLayoutStage,
1285 and return it. PLIST has this form:
1286 PLIST ::= ( COMMAND ( CMD-NAME COMMAND ) * )
1289 static FontLayoutStage *
1290 load_generator (MPlist *plist)
1292 FontLayoutStage *stage;
1294 FontLayoutCmd dummy;
1297 MSTRUCT_CALLOC (stage, MERROR_DRAW);
1298 MLIST_INIT1 (stage, cmds, 32);
1299 dummy.type = FontLayoutCmdTypeMAX;
1300 MLIST_APPEND1 (stage, cmds, dummy, MERROR_FONT);
1301 MPLIST_DO (elt, MPLIST_NEXT (plist))
1303 if (! MPLIST_PLIST_P (elt))
1304 MERROR (MERROR_FONT, NULL);
1305 pl = MPLIST_PLIST (elt);
1306 if (! MPLIST_SYMBOL_P (pl))
1307 MERROR (MERROR_FONT, NULL);
1308 MLIST_APPEND1 (stage, cmds, dummy, MERROR_FONT);
1311 /* Load the first command from PLIST into STAGE->cmds[0]. Macros
1312 called in the first command are also loaded from MPLIST_NEXT
1313 (PLIST) into STAGE->cmds[n]. */
1314 result = load_command (stage, plist, MPLIST_NEXT (plist),
1315 INDEX_TO_CMD_ID (0));
1316 if (result == INVALID_CMD_ID || result == -2)
1318 MLIST_FREE1 (stage, cmds);
1327 /* Load stages of the font layout table FLT. */
1330 load_flt (MFLT *flt, MPlist *key_list)
1332 MPlist *top, *plist, *pl, *p;
1333 FontLayoutCategory *category = NULL;
1337 top = (MPlist *) mdatabase__load_for_keys (flt->mdb, key_list);
1339 top = (MPlist *) mdatabase_load (flt->mdb);
1342 if (! MPLIST_PLIST_P (top))
1344 M17N_OBJECT_UNREF (top);
1345 MERROR (MERROR_FLT, -1);
1350 plist = mdatabase__props (flt->mdb);
1352 MERROR (MERROR_FLT, -1);
1353 MPLIST_DO (plist, plist)
1354 if (MPLIST_PLIST_P (plist))
1356 pl = MPLIST_PLIST (plist);
1357 if (! MPLIST_SYMBOL_P (pl)
1358 || MPLIST_SYMBOL (pl) != Mfont)
1360 pl = MPLIST_NEXT (pl);
1361 if (! MPLIST_PLIST_P (pl))
1363 p = MPLIST_PLIST (pl);
1364 if (! MPLIST_SYMBOL_P (p))
1366 p = MPLIST_NEXT (p);
1367 if (! MPLIST_SYMBOL_P (p))
1369 flt->family = MPLIST_SYMBOL (p);
1370 MPLIST_DO (p, MPLIST_NEXT (p))
1371 if (MPLIST_SYMBOL_P (p))
1373 sym = MPLIST_SYMBOL (p);
1374 if (MSYMBOL_NAME (sym)[0] != ':')
1375 flt->registry = sym, sym = Mnil;
1381 char *otf_spec = MSYMBOL_NAME (sym);
1383 if (otf_spec[0] == ':' && otf_spec[1] == 'o'
1384 && otf_spec[2] == 't' && otf_spec[3] == 'f')
1385 parse_otf_command (sym, &flt->otf);
1390 MPLIST_DO (plist, top)
1392 if (MPLIST_SYMBOL_P (plist)
1393 && MPLIST_SYMBOL (plist) == Mend)
1395 mplist_set (plist, Mnil, NULL);
1398 if (! MPLIST_PLIST (plist))
1400 pl = MPLIST_PLIST (plist);
1401 if (! MPLIST_SYMBOL_P (pl))
1403 sym = MPLIST_SYMBOL (pl);
1404 pl = MPLIST_NEXT (pl);
1407 if (sym == Mcategory)
1410 unref_category_table (category);
1411 else if (flt->coverage)
1413 category = flt->coverage;
1414 ref_category_table (category);
1417 category = load_category_table (pl, NULL);
1420 if (! flt->coverage)
1422 flt->coverage = category;
1423 ref_category_table (category);
1425 if (category->definition)
1426 flt->need_config = 1;
1428 else if (sym == Mgenerator)
1430 FontLayoutStage *stage;
1434 stage = load_generator (pl);
1437 stage->category = category;
1438 M17N_OBJECT_REF (category->table);
1440 flt->stages = mplist ();
1441 mplist_add (flt->stages, Mt, stage);
1445 unref_category_table (category);
1447 if (! MPLIST_TAIL_P (plist))
1449 M17N_OBJECT_UNREF (top);
1450 M17N_OBJECT_UNREF (flt->stages);
1451 MERROR (MERROR_FLT, -1);
1453 M17N_OBJECT_UNREF (top);
1459 free_flt_stage (MFLT *flt, FontLayoutStage *stage)
1463 unref_category_table (stage->category);
1466 for (i = 0; i < stage->used; i++)
1467 free_flt_command (stage->cmds + i);
1468 MLIST_FREE1 (stage, cmds);
1480 MPLIST_DO (plist, flt_list)
1482 MFLT *flt = MPLIST_VAL (plist);
1485 unref_category_table (flt->coverage);
1488 MPLIST_DO (pl, MPLIST_NEXT (flt->stages))
1489 free_flt_stage (flt, MPLIST_VAL (pl));
1490 M17N_OBJECT_UNREF (flt->stages);
1493 MPLIST_VAL (plist) = NULL;
1495 M17N_OBJECT_UNREF (flt_list);
1502 MPlist *plist, *key_list = NULL;
1506 if (! (plist = mdatabase_list (Mfont, Mlayouter, Mnil, Mnil)))
1508 if (! (flt_list = mplist ()))
1510 if (! (key_list = mplist ()))
1512 if (! mplist_add (key_list, Mcategory, Mt))
1515 MPLIST_DO (pl, plist)
1517 MDatabase *mdb = MPLIST_VAL (pl);
1518 MSymbol *tags = mdatabase_tag (mdb);
1521 if (! MSTRUCT_CALLOC_SAFE (flt))
1523 flt->name = tags[2];
1525 if (load_flt (flt, key_list) < 0)
1529 if (MPLIST_TAIL_P (flt_list))
1531 flt_min_coverage = mchartable_min_char (flt->coverage->table);
1532 flt_max_coverage = mchartable_max_char (flt->coverage->table);
1538 c = mchartable_min_char (flt->coverage->table);
1539 if (flt_min_coverage > c)
1540 flt_min_coverage = c;
1541 c = mchartable_max_char (flt->coverage->table);
1542 if (flt_max_coverage < c)
1543 flt_max_coverage = c;
1545 if (! mplist_push (flt_list, flt->name, flt))
1555 M17N_OBJECT_UNREF (plist);
1556 M17N_OBJECT_UNREF (key_list);
1560 /* FLS (Font Layout Service) */
1562 /* Structure to hold information about a context of FLS. */
1566 /* Pointer to the current stage. */
1567 FontLayoutStage *stage;
1569 /* Pointer to the category table of the next stage or NULL if none. */
1570 FontLayoutCategory *category;
1572 /* Pointer to the font. */
1575 /* Input and output glyph string. */
1576 MFLTGlyphString *in, *out;
1578 /* Encode each character or code of a glyph by the current category
1579 table into this array. An element is a category letter used for
1580 a regular expression matching. */
1585 int cluster_begin_idx;
1586 int cluster_begin_pos;
1587 int cluster_end_pos;
1591 } FontLayoutContext;
1593 static int run_command (int, int, int, int, FontLayoutContext *);
1594 static int run_otf (int, MFLTOtfSpec *, int, int, FontLayoutContext *);
1595 static int try_otf (int, MFLTOtfSpec *, int, int, FontLayoutContext *);
1600 run_rule (int depth,
1601 FontLayoutCmdRule *rule, int from, int to, FontLayoutContext *ctx)
1603 int *saved_match_indices = ctx->match_indices;
1604 int match_indices[NMATCH * 2];
1607 int orig_from = from;
1608 int need_cluster_update = 0;
1610 if (rule->src_type == SRC_REGEX)
1612 regmatch_t pmatch[NMATCH];
1618 saved_code = ctx->encoded[to - ctx->encoded_offset];
1619 ctx->encoded[to - ctx->encoded_offset] = '\0';
1620 result = regexec (&(rule->src.re.preg),
1621 ctx->encoded + (from - ctx->encoded_offset),
1623 if (result == 0 && pmatch[0].rm_so == 0)
1625 if (MDEBUG_FLAG () > 2)
1626 MDEBUG_PRINT5 ("\n [FLT] %*s(REGEX \"%s\" \"%s\" %d", depth, "",
1627 rule->src.re.pattern,
1628 ctx->encoded + (from - ctx->encoded_offset),
1630 ctx->encoded[to - ctx->encoded_offset] = saved_code;
1631 for (i = 0; i < NMATCH; i++)
1633 if (pmatch[i].rm_so < 0)
1634 match_indices[i * 2] = match_indices[i * 2 + 1] = -1;
1637 match_indices[i * 2] = from + pmatch[i].rm_so;
1638 match_indices[i * 2 + 1] = from + pmatch[i].rm_eo;
1641 ctx->match_indices = match_indices;
1642 to = match_indices[1];
1646 ctx->encoded[to - ctx->encoded_offset] = saved_code;
1649 need_cluster_update = 1;
1651 else if (rule->src_type == SRC_SEQ)
1655 len = rule->src.seq.n_codes;
1656 if (len > (to - from))
1658 for (i = 0; i < len; i++)
1659 if (rule->src.seq.codes[i] != GREF (ctx->in, from + i)->c)
1664 if (MDEBUG_FLAG () > 2)
1665 MDEBUG_PRINT3 ("\n [FLT] %*s(SEQ 0x%X", depth, "",
1666 rule->src.seq.codes[0]);
1667 need_cluster_update = 1;
1669 else if (rule->src_type == SRC_RANGE)
1675 head = GREF (ctx->in, from)->c;
1676 if (head < rule->src.range.from || head > rule->src.range.to)
1678 ctx->code_offset = head - rule->src.range.from;
1680 if (MDEBUG_FLAG () > 2)
1681 MDEBUG_PRINT4 ("\n [FLT] %*s(RANGE 0x%X-0x%X", depth, "",
1682 rule->src.range.from, rule->src.range.to);
1683 need_cluster_update = 1;
1685 else if (rule->src_type == SRC_INDEX)
1687 if (rule->src.match_idx >= NMATCH)
1689 from = ctx->match_indices[rule->src.match_idx * 2];
1692 to = ctx->match_indices[rule->src.match_idx * 2 + 1];
1693 if (MDEBUG_FLAG () > 2)
1694 MDEBUG_PRINT3 ("\n [FLT] %*s(SUBPART %d", depth, "",
1695 rule->src.match_idx);
1696 need_cluster_update = 1;
1698 else if (rule->src_type == SRC_HAS_GLYPH
1699 || rule->src_type == SRC_OTF_SPEC)
1701 static MFLTGlyphString gstring;
1705 if (rule->src.facility.len > 0)
1707 if (! gstring.glyph_size)
1709 gstring.glyph_size = ctx->in->glyph_size;
1710 gstring.glyphs = calloc (rule->src.facility.len,
1711 gstring.glyph_size);
1712 gstring.allocated = rule->src.facility.len;
1713 gstring.used = rule->src.facility.len;
1715 else if (rule->src.facility.len < gstring.allocated)
1717 gstring.glyphs = realloc (gstring.glyphs,
1719 * rule->src.facility.len);
1720 gstring.allocated = rule->src.facility.len;
1721 gstring.used = rule->src.facility.len;
1724 for (i = 0, p = rule->src.facility.codes, idx = from;
1725 i < rule->src.facility.len; i++, p = MPLIST_NEXT (p))
1727 if (MPLIST_INTEGER_P (p))
1729 GREF (&gstring, i)->c = MPLIST_INTEGER (p);
1730 GREF (&gstring, i)->encoded = 0;
1734 GREF (&gstring, i)->c = GREF (ctx->in, idx)->code;
1735 GREF (&gstring, i)->encoded = GREF (ctx->in, idx)->encoded;
1741 if (MDEBUG_FLAG () > 2)
1743 if (rule->src_type == SRC_HAS_GLYPH)
1744 MDEBUG_PRINT2 ("\n [FLT] %*s(HAS-GLYPH", depth, "");
1746 MDEBUG_PRINT2 ("\n [FLT] %*s(OTF-SPEC", depth, "");
1747 for (i = 0; i < rule->src.facility.len; i++)
1748 MDEBUG_PRINT1 (" %04X", GREF (&gstring, i)->code);
1750 if (ctx->font->get_glyph_id (ctx->font, &gstring, 0,
1751 rule->src.facility.len) < 0)
1753 MDEBUG_PRINT (") FAIL!");
1756 if (rule->src_type == SRC_OTF_SPEC)
1758 MFLTOtfSpec *spec = &rule->src.facility.otf_spec;
1760 if (! ctx->font->check_otf)
1762 if ((spec->features[0] && spec->features[0][0] != 0xFFFFFFFF)
1763 || (spec->features[1] && spec->features[1][0] != 0xFFFFFFFF))
1768 if (rule->src.facility.len == 0)
1770 if (! ctx->font->check_otf (ctx->font, spec))
1775 int prev_out_used = ctx->out->used, out_used;
1776 MFLTGlyphAdjustment *adjustment;
1778 adjustment = alloca ((sizeof *adjustment)
1779 * (ctx->out->allocated - ctx->out->used));
1781 MERROR (MERROR_FLT, -1);
1782 memset (adjustment, 0,
1783 (sizeof *adjustment)
1784 * (ctx->out->allocated - ctx->out->used));
1785 ctx->font->drive_otf (ctx->font, &rule->src.facility.otf_spec,
1786 &gstring, 0, rule->src.facility.len,
1789 out_used = ctx->out->used;
1790 ctx->out->used = prev_out_used;
1791 if (rule->src.facility.len == out_used - prev_out_used)
1793 for (i = prev_out_used; i < out_used; i++)
1795 if (GREF (&gstring, i - prev_out_used)->code
1796 != GREF (ctx->out, i)->code)
1798 if (adjustment[i - prev_out_used].set)
1809 if (need_cluster_update && ctx->cluster_begin_idx >= 0)
1811 for (i = from; i < to; i++)
1813 MFLTGlyph *g = GREF (ctx->in, i);
1814 UPDATE_CLUSTER_RANGE (ctx, g);
1820 for (i = 0; i < rule->n_cmds; i++)
1824 if (rule->cmd_ids[i] == CMD_ID_REPEAT)
1830 pos = run_command (depth, rule->cmd_ids[i], from, to, ctx);
1833 consumed = pos > from;
1838 ctx->match_indices = saved_match_indices;
1839 if (MDEBUG_FLAG () > 2)
1841 return (rule->src_type == SRC_INDEX ? orig_from : to);
1845 run_cond (int depth,
1846 FontLayoutCmdCond *cond, int from, int to, FontLayoutContext *ctx)
1850 if (MDEBUG_FLAG () > 2)
1851 MDEBUG_PRINT2 ("\n [FLT] %*s(COND", depth, "");
1853 for (i = 0; i < cond->n_cmds; i++)
1855 /* TODO: Write a code for optimization utilizaing the info
1857 if ((pos = run_command (depth, cond->cmd_ids[i], from, to, ctx))
1863 if (MDEBUG_FLAG () > 2)
1869 decode_packed_otf_tag (FontLayoutContext *ctx, MFLTGlyphString *gstring,
1870 int from, int to, FontLayoutCategory *category)
1872 for (; from < to; from++)
1874 MFLTGlyph *g = GREF (gstring, from);
1875 unsigned int tag = g->internal & 0xFFFFFFF;
1880 SET_CATEGORY_CODE (g, 0);
1883 if (tag & 0xFFFFF80)
1887 /* Clear the feature tag code. */
1888 g->internal &= ~0xFFFFFFF;
1889 for (i = 0, enc = '\0'; i < category->feature_table.size; i++)
1890 if (category->feature_table.tag[i] == tag)
1892 enc = category->feature_table.code[i];
1893 if (ctx->in == gstring)
1894 ctx->encoded[from - ctx->encoded_offset] = enc;
1901 enc = g->c > 0 ? (int) mchartable_lookup (category->table, g->c) : 1;
1902 SET_CATEGORY_CODE (g, enc);
1908 MFLTOtfSpec *otf_spec, int from, int to, FontLayoutContext *ctx)
1910 MFLTFont *font = ctx->font;
1911 int from_idx = ctx->out->used;
1913 if (MDEBUG_FLAG () > 2)
1914 MDEBUG_PRINT3 ("\n [FLT] %*s%s", depth, "", MSYMBOL_NAME (otf_spec->sym));
1916 font->get_glyph_id (font, ctx->in, from, to);
1917 if (! font->drive_otf)
1919 if (ctx->out->used + (to - from) > ctx->out->allocated)
1921 font->get_metrics (font, ctx->in, from, to);
1922 GCPY (ctx->in, from, to - from, ctx->out, ctx->out->used);
1923 ctx->out->used += to - from;
1927 MFLTGlyphAdjustment *adjustment;
1931 adjustment = alloca ((sizeof *adjustment)
1932 * (ctx->out->allocated - ctx->out->used));
1934 MERROR (MERROR_FLT, -1);
1935 memset (adjustment, 0,
1936 (sizeof *adjustment) * (ctx->out->allocated - ctx->out->used));
1937 to = font->drive_otf (font, otf_spec, ctx->in, from, to, ctx->out,
1941 decode_packed_otf_tag (ctx, ctx->out, from_idx, ctx->out->used,
1943 out_len = ctx->out->used - from_idx;
1944 if (otf_spec->features[1])
1946 MFLTGlyphAdjustment *a;
1949 for (i = 0, a = adjustment; i < out_len; i++, a++)
1954 font->get_metrics (font, ctx->out, from_idx, ctx->out->used);
1955 for (g = GREF (ctx->out, from_idx + i);
1956 i < out_len; i++, a++, g = NEXT (ctx->out, g))
1959 if (a->advance_is_absolute)
1964 else if (a->xadv || a->yadv)
1969 if (a->xoff || a->yoff || a->back)
1972 MFLTGlyph *gg = PREV (ctx->out, g);
1973 MFLTGlyphAdjustment *aa = a;
1977 g->lbearing += a->xoff;
1978 g->rbearing += a->xoff;
1979 g->ascent -= a->yoff;
1980 g->descent -= a->yoff;
1981 while (aa->back > 0)
1983 for (j = 0; j < aa->back;
1984 j++, gg = PREV (ctx->out, gg))
1986 g->xoff -= gg->xadv;
1987 g->lbearing -= gg->xadv;
1988 g->rbearing -= gg->xadv;
1991 g->xoff += aa->xoff;
1992 g->yoff += aa->yoff;
1993 g->lbearing += aa->xoff;
1994 g->rbearing += aa->xoff;
1995 g->ascent -= aa->yoff;
1996 g->descent -= aa->yoff;
2005 if (ctx->cluster_begin_idx >= 0)
2006 for (; from_idx < ctx->out->used; from_idx++)
2008 MFLTGlyph *g = GREF (ctx->out, from_idx);
2009 UPDATE_CLUSTER_RANGE (ctx, g);
2015 try_otf (int depth, MFLTOtfSpec *otf_spec, int from, int to,
2016 FontLayoutContext *ctx)
2018 MFLTFont *font = ctx->font;
2019 int from_idx = ctx->out->used;
2021 if (MDEBUG_FLAG () > 2)
2022 MDEBUG_PRINT3 ("\n [FLT] %*s%s", depth, "", MSYMBOL_NAME (otf_spec->sym));
2024 if (! otf_spec->features[0] && ! otf_spec->features[1])
2026 /* Reset categories. */
2027 MCharTable *table = ctx->category->table;
2030 for (i = from; i < to; i++)
2032 MFLTGlyph *g = GREF (ctx->in, i);
2034 if (! GET_COMBINED (g))
2036 char enc = (GET_ENCODED (g)
2037 ? (g->c > 0 ? (int) mchartable_lookup (table, g->c)
2040 ? (int) mchartable_lookup (table, g->code)
2042 SET_CATEGORY_CODE (g, enc);
2043 ctx->encoded[i - ctx->encoded_offset] = enc;
2049 if (ctx->stage->category->feature_table.size == 0)
2052 font->get_glyph_id (font, ctx->in, from, to);
2058 to = mflt_try_otf (font, otf_spec, ctx->in, from, to);
2061 decode_packed_otf_tag (ctx, ctx->in, from, to, ctx->stage->category);
2066 static char work[16];
2069 dump_combining_code (int code)
2071 char *vallign = "tcbB";
2072 char *hallign = "lcr";
2078 work[0] = vallign[COMBINING_CODE_BASE_Y (code)];
2079 work[1] = hallign[COMBINING_CODE_BASE_X (code)];
2080 off_y = COMBINING_CODE_OFF_Y (code);
2081 off_x = COMBINING_CODE_OFF_X (code);
2083 sprintf (work + 2, "+%d", off_y);
2085 sprintf (work + 2, "%d", off_y);
2086 else if (off_x == 0)
2087 sprintf (work + 2, ".");
2088 p = work + strlen (work);
2090 sprintf (p, ">%d", off_x);
2092 sprintf (p, "<%d", -off_x);
2094 p[0] = vallign[COMBINING_CODE_ADD_Y (code)];
2095 p[1] = hallign[COMBINING_CODE_ADD_X (code)];
2101 run_command (int depth, int id, int from, int to, FontLayoutContext *ctx)
2108 MCharTable *table = ctx->category ? ctx->category->table : NULL;
2111 /* Direct code (== ctx->code_offset + id) output.
2112 The source is not consumed. */
2113 if (MDEBUG_FLAG () > 2)
2114 MDEBUG_PRINT3 ("\n [FLT] %*s(DIRECT 0x%X", depth, "",
2115 ctx->code_offset + id);
2116 i = (from < to || from == 0) ? from : from - 1;
2118 g = GREF (ctx->out, ctx->out->used - 1);
2119 g->c = g->code = ctx->code_offset + id;
2120 if (ctx->combining_code)
2121 SET_COMBINING_CODE (g, ctx, ctx->combining_code);
2124 enc = (GET_ENCODED (g)
2125 ? (g->c > 0 ? (int) mchartable_lookup (table, g->c) : 1)
2127 ? (int) mchartable_lookup (table, g->code)
2129 SET_CATEGORY_CODE (g, enc);
2132 SET_MEASURED (g, 0);
2133 if (ctx->left_padding)
2134 SET_LEFT_PADDING (g, ctx, LeftPaddingMask);
2135 for (i = from; i < to; i++)
2137 MFLTGlyph *tmp = GREF (ctx->in, i);
2139 if (g->from > tmp->from)
2140 g->from = tmp->from;
2141 else if (g->to < tmp->to)
2144 if (ctx->cluster_begin_idx >= 0)
2145 UPDATE_CLUSTER_RANGE (ctx, g);
2146 ctx->code_offset = ctx->combining_code = ctx->left_padding = 0;
2147 if (MDEBUG_FLAG () > 2)
2152 if (id <= CMD_ID_OFFSET_INDEX)
2154 int idx = CMD_ID_TO_INDEX (id);
2157 if (idx >= ctx->stage->used)
2158 MERROR (MERROR_DRAW, -1);
2159 cmd = ctx->stage->cmds + idx;
2160 if (cmd->type == FontLayoutCmdTypeRule)
2161 to = run_rule (depth, &cmd->body.rule, from, to, ctx);
2162 else if (cmd->type == FontLayoutCmdTypeCond)
2163 to = run_cond (depth, &cmd->body.cond, from, to, ctx);
2164 else if (cmd->type == FontLayoutCmdTypeOTF)
2165 to = run_otf (depth, &cmd->body.otf, from, to, ctx);
2166 else if (cmd->type == FontLayoutCmdTypeOTFCategory)
2167 to = try_otf (depth, &cmd->body.otf, from, to, ctx);
2171 if (id <= CMD_ID_OFFSET_COMBINING)
2173 ctx->combining_code = CMD_ID_TO_COMBINING_CODE (id);
2174 if (MDEBUG_FLAG () > 2)
2175 MDEBUG_PRINT3 ("\n [FLT] %*s(CMB %s)", depth, "",
2176 dump_combining_code (ctx->combining_code));
2187 g = GREF (ctx->out, ctx->out->used - 1);
2188 if (ctx->combining_code)
2189 SET_COMBINING_CODE (g, ctx, ctx->combining_code);
2190 if (ctx->left_padding)
2191 SET_LEFT_PADDING (g, ctx, LeftPaddingMask);
2192 if (ctx->cluster_begin_idx >= 0)
2193 UPDATE_CLUSTER_RANGE (ctx, g);
2194 if (MDEBUG_FLAG () > 2)
2197 MDEBUG_PRINT2 ("\n [FLT] %*s(COPY |)", depth, "");
2199 MDEBUG_PRINT3 ("\n [FLT] %*s(COPY 0x%X)", depth, "", g->c);
2201 ctx->code_offset = ctx->combining_code = ctx->left_padding = 0;
2205 case CMD_ID_CLUSTER_BEGIN:
2206 if (ctx->cluster_begin_idx < 0)
2208 if (MDEBUG_FLAG () > 2)
2209 MDEBUG_PRINT3 ("\n [FLT] %*s<%d", depth, "",
2210 GREF (ctx->in, from)->from);
2211 ctx->cluster_begin_idx = ctx->out->used;
2212 ctx->cluster_begin_pos = GREF (ctx->in, from)->from;
2213 ctx->cluster_end_pos = GREF (ctx->in, from)->to;
2217 case CMD_ID_CLUSTER_END:
2218 if (ctx->cluster_begin_idx >= 0
2219 && ctx->cluster_begin_idx < ctx->out->used)
2223 if (MDEBUG_FLAG () > 2)
2224 MDEBUG_PRINT1 (" %d>", ctx->cluster_end_pos + 1);
2225 for (i = ctx->cluster_begin_idx; i < ctx->out->used; i++)
2227 GREF (ctx->out, i)->from = ctx->cluster_begin_pos;
2228 GREF (ctx->out, i)->to = ctx->cluster_end_pos;
2230 ctx->cluster_begin_idx = -1;
2234 case CMD_ID_SEPARATOR:
2238 i = from < to ? from : from - 1;
2240 g = GREF (ctx->out, ctx->out->used - 1);
2241 g->c = -1, g->code = 0;
2242 g->xadv = g->yadv = 0;
2244 SET_MEASURED (g, 0);
2245 SET_CATEGORY_CODE (g, ' ');
2249 case CMD_ID_LEFT_PADDING:
2250 if (MDEBUG_FLAG () > 2)
2251 MDEBUG_PRINT2 ("\n [FLT] %*s[", depth, "");
2252 ctx->left_padding = 1;
2255 case CMD_ID_RIGHT_PADDING:
2256 if (ctx->out->used > 0)
2258 if (MDEBUG_FLAG () > 2)
2259 MDEBUG_PRINT2 ("\n [FLT] %*s]", depth, "");
2260 g = GREF (ctx->out, ctx->out->used - 1);
2261 SET_RIGHT_PADDING (g, ctx, RightPaddingMask);
2266 MERROR (MERROR_DRAW, -1);
2270 run_stages (MFLTGlyphString *gstring, int from, int to,
2271 MFLT *flt, FontLayoutContext *ctx)
2273 MFLTGlyphString buf, *temp;
2275 int orig_from = from, orig_to = to;
2276 int from_pos, to_pos, len;
2279 MPlist *stages = flt->stages;
2280 FontLayoutCategory *prev_category = NULL;
2282 from_pos = GREF (ctx->in, from)->from;
2283 to_pos = GREF (ctx->in, to - 1)->to;
2284 len = to_pos - from_pos;
2288 GINIT (ctx->out, ctx->out->allocated);
2289 ctx->encoded = alloca (ctx->out->allocated);
2290 if (! ctx->out->glyphs || ! ctx->encoded)
2293 for (stage_idx = 0; 1; stage_idx++)
2298 ctx->stage = (FontLayoutStage *) MPLIST_VAL (stages);
2299 table = ctx->stage->category->table;
2300 stages = MPLIST_NEXT (stages);
2301 if (MPLIST_TAIL_P (stages))
2302 ctx->category = NULL;
2304 ctx->category = ((FontLayoutStage *) MPLIST_VAL (stages))->category;
2305 ctx->code_offset = ctx->combining_code = ctx->left_padding = 0;
2306 ctx->encoded_offset = from;
2307 for (i = from; i < to; i++)
2309 MFLTGlyph *g = GREF (ctx->in, i);
2312 if (GET_COMBINED (g)
2313 || (prev_category && prev_category != ctx->stage->category))
2315 enc = (GET_ENCODED (g)
2316 ? (g->c > 0 ? (int) mchartable_lookup (table, g->c) : 1)
2318 ? (int) mchartable_lookup (table, g->code)
2320 if (! GET_COMBINED (g))
2321 SET_CATEGORY_CODE (g, enc);
2324 enc = GET_CATEGORY_CODE (g);
2325 ctx->encoded[i - from] = enc;
2326 if (! enc && stage_idx == 0)
2332 ctx->encoded[i - from] = '\0';
2333 ctx->match_indices[0] = from;
2334 ctx->match_indices[1] = to;
2335 for (i = 2; i < NMATCH; i++)
2336 ctx->match_indices[i] = -1;
2338 if (MDEBUG_FLAG () > 2)
2340 MDEBUG_PRINT2 ("\n [FLT] (STAGE %d \"%s\"", stage_idx,
2342 MDEBUG_PRINT (" (");
2343 for (i = from; i < to; i++)
2345 g = GREF (ctx->in, i);
2347 MDEBUG_PRINT2 ("%*s|", (i > 0), "");
2349 MDEBUG_PRINT3 ("%*s%04X", (i > 0), "", GREF (ctx->in, i)->code);
2353 result = run_command (4, INDEX_TO_CMD_ID (0), from, to, ctx);
2354 if (MDEBUG_FLAG () > 2)
2359 /* If this is the last stage, break the loop. */
2360 if (MPLIST_TAIL_P (stages))
2363 /* Otherwise, prepare for the next stage. */
2364 prev_category = ctx->stage->category;
2371 GINIT (&buf, ctx->out->allocated);
2380 if (ctx->out->used > 0)
2383 int x_ppem = ctx->font->x_ppem << 6, y_ppem = ctx->font->y_ppem << 6;
2385 /* Remove separator glyphs. */
2386 for (i = 0; i < ctx->out->used;)
2388 g = GREF (ctx->out, i);
2390 GREPLACE (NULL, 0, 0, ctx->out, i, i + 1);
2395 /* Get actual glyph IDs of glyphs. */
2396 ctx->font->get_glyph_id (ctx->font, ctx->out, 0, ctx->out->used);
2398 /* Check if all characters in the range are covered by some
2399 glyph(s). If not, change <from> and <to> of glyphs to cover
2400 uncovered characters. */
2401 g_indices = alloca (sizeof (int) * len);
2404 for (i = 0; i < len; i++) g_indices[i] = -1;
2405 for (i = 0; i < ctx->out->used; i++)
2409 g = GREF (ctx->out, i);
2410 for (pos = g->from; pos <= g->to; pos++)
2411 if (g_indices[pos - from_pos] < 0)
2412 g_indices[pos - from_pos] = i;
2414 for (i = 0; i < len; i++)
2415 if (g_indices[i] < 0)
2421 for (i++; i < len && g_indices[i] < 0; i++);
2423 g = GREF (ctx->out, j);
2424 this_from = g->from;
2426 g->from = orig_from + i;
2427 } while (++j < ctx->out->used
2428 && (g = GREF (ctx->out, j))
2429 && g->from == this_from);
2435 j = g_indices[i - 1];
2436 g = GREF (ctx->out, j);
2439 g->to = orig_from + i + 1;
2441 && (g = GREF (ctx->out, j))
2442 && g->to == this_to);
2446 ctx->font->get_metrics (ctx->font, ctx->out, 0, ctx->out->used);
2448 /* Handle combining. */
2449 if (ctx->check_mask & CombinedMask)
2451 MFLTGlyph *base = GREF (ctx->out, 0);
2452 int base_height = base->ascent + base->descent;
2453 int base_width = base->rbearing - base->lbearing;
2456 for (i = 1; i < ctx->out->used; i++)
2458 if ((g = GREF (ctx->out, i))
2460 && (combining_code = GET_COMBINING_CODE (g)))
2462 int height = g->ascent + g->descent;
2463 int width = g->rbearing - g->lbearing;
2464 int base_x, base_y, add_x, add_y, off_x, off_y;
2466 if (base->from > g->from)
2467 base->from = g->from;
2468 else if (base->to < g->to)
2471 base_x = COMBINING_CODE_BASE_X (combining_code);
2472 base_y = COMBINING_CODE_BASE_Y (combining_code);
2473 add_x = COMBINING_CODE_ADD_X (combining_code);
2474 add_y = COMBINING_CODE_ADD_Y (combining_code);
2475 off_x = COMBINING_CODE_OFF_X (combining_code);
2476 off_y = COMBINING_CODE_OFF_Y (combining_code);
2478 g->xoff = ((base_width * base_x - width * add_x) / 2
2479 + x_ppem * off_x / 100
2480 - (base->xadv - base->lbearing) - g->lbearing);
2482 g->yoff = base_height * base_y / 2 - base->ascent;
2486 g->yoff -= height * add_y / 2 - g->ascent;
2487 g->yoff -= y_ppem * off_y / 100;
2488 if (base->lbearing > base->xadv + g->lbearing + g->xoff)
2489 base->lbearing = base->xadv + g->lbearing + g->xoff;
2490 if (base->rbearing < base->xadv + g->rbearing + g->xoff)
2491 base->rbearing = base->xadv + g->rbearing + g->xoff;
2492 if (base->ascent < g->ascent - g->yoff)
2493 base->ascent = g->ascent - g->yoff;
2494 if (base->descent < g->descent - g->yoff)
2495 base->descent = g->descent - g->yoff;
2496 g->xadv = g->yadv = 0;
2497 if (GET_RIGHT_PADDING (g))
2498 SET_RIGHT_PADDING (base, ctx, RightPaddingMask);
2504 base_height = g->ascent + g->descent;
2505 base_width = g->rbearing - g->lbearing;
2510 /* Handle padding */
2511 if (ctx->check_mask & (LeftPaddingMask | RightPaddingMask))
2512 for (i = 0; i < ctx->out->used; i++)
2514 g = GREF (ctx->out, i);
2515 if (! GET_COMBINED (g))
2517 if (GET_RIGHT_PADDING (g) && g->rbearing > g->xadv)
2519 g->xadv = g->rbearing;
2522 if (GET_LEFT_PADDING (g) && g->lbearing < 0)
2524 g->xoff += - g->lbearing;
2525 g->xadv += - g->lbearing;
2526 g->rbearing += - g->lbearing;
2534 GREPLACE (ctx->out, 0, ctx->out->used, gstring, orig_from, orig_to);
2535 to = orig_from + ctx->out->used;
2540 setup_combining_coverage (int from, int to, void *val, void *arg)
2542 int combining_class = (int) val;
2545 if (combining_class < 200)
2547 else if (combining_class <= 204)
2549 if ((combining_class % 2) == 0)
2550 category = "bcd"[(combining_class - 200) / 2];
2552 else if (combining_class <= 232)
2554 if ((combining_class % 2) == 0)
2555 category = "efghijklmnopq"[(combining_class - 208) / 2];
2557 else if (combining_class == 233)
2559 else if (combining_class == 234)
2561 else if (combining_class == 240)
2563 mchartable_set_range ((MCharTable *) arg, from, to, (void *) category);
2567 setup_combining_flt (MFLT *flt)
2570 MCharTable *combininig_class_table
2571 = mchar_get_prop_table (Mcombining_class, &type);
2573 mchartable_set_range (flt->coverage->table, 0, 0x10FFFF, (void *) 'u');
2574 if (combininig_class_table)
2575 mchartable_map (combininig_class_table, (void *) 0,
2576 setup_combining_coverage, flt->coverage->table);
2579 #define CHECK_FLT_STAGES(flt) ((flt)->stages || load_flt (flt, NULL) == 0)
2581 static FontLayoutCategory *
2582 configure_category (FontLayoutCategory *category, MFLTFont *font)
2584 if (! mflt_font_id || ! mflt_iterate_otf_feature)
2586 FontLayoutCategory *new = malloc (sizeof (FontLayoutCategory));
2587 new->definition = NULL;
2588 new->table = category->table;
2589 M17N_OBJECT_REF (new->table);
2592 return load_category_table (category->definition, font);
2596 configure_flt (MFLT *flt, MFLTFont *font, MSymbol font_id)
2601 if (! mflt_font_id || ! mflt_iterate_otf_feature)
2603 MPLIST_DO (plist, flt_list)
2605 configured = MPLIST_VAL (plist);
2606 if (! configured->font_id)
2608 if (configured->name == flt->name
2609 && configured->font_id == font_id)
2612 if (! MSTRUCT_CALLOC_SAFE (configured))
2615 configured->stages = mplist_copy (flt->stages);
2616 MPLIST_DO (plist, configured->stages)
2618 FontLayoutStage *stage = MPLIST_VAL (plist);
2619 if (stage->category->definition)
2621 MSTRUCT_CALLOC (stage, MERROR_FLT);
2622 *stage = *((FontLayoutStage *) MPLIST_VAL (plist));
2623 stage->category = configure_category (stage->category, font);
2624 MPLIST_VAL (plist) = stage;
2627 M17N_OBJECT_REF (stage->category->table);
2629 configured->need_config = 0;
2630 configured->font_id = font_id;
2631 mplist_push (flt_list, flt->name, configured);
2637 int m17n__flt_initialized;
2642 /* The following two are actually not exposed to a user but concealed
2643 by the macro M17N_INIT (). */
2646 m17n_init_flt (void)
2648 int mdebug_flag = MDEBUG_INIT;
2650 merror_code = MERROR_NONE;
2651 if (m17n__flt_initialized++)
2654 if (merror_code != MERROR_NONE)
2656 m17n__flt_initialized--;
2660 MDEBUG_PUSH_TIME ();
2662 Mcond = msymbol ("cond");
2663 Mrange = msymbol ("range");
2664 Mfont = msymbol ("font");
2665 Mlayouter = msymbol ("layouter");
2666 Mcombining = msymbol ("combining");
2667 Mfont_facility = msymbol ("font-facility");
2668 Mequal = msymbol ("=");
2669 Mgenerator = msymbol ("generator");
2670 Mend = msymbol ("end");
2672 mflt_enable_new_feature = 0;
2673 mflt_iterate_otf_feature = NULL;
2674 mflt_font_id = NULL;
2675 mflt_try_otf = NULL;
2677 MDEBUG_PRINT_TIME ("INIT", (stderr, " to initialize the flt modules."));
2682 m17n_fini_flt (void)
2684 int mdebug_flag = MDEBUG_FINI;
2686 if (m17n__flt_initialized == 0
2687 || --m17n__flt_initialized > 0)
2690 MDEBUG_PUSH_TIME ();
2692 MDEBUG_PRINT_TIME ("FINI", (stderr, " to finalize the flt modules."));
2698 #endif /* !FOR_DOXYGEN || DOXYGEN_INTERNAL_MODULE */
2700 /*** @addtogroup m17nFLT */
2706 @brief Return an FLT object that has a specified name.
2708 The mflt_get () function returns an FLT object whose name is $NAME.
2711 If the operation was successful, mflt_get () returns a pointer
2712 to the found FLT object. Otherwise, it returns @c NULL. */
2715 @brief »ØÄꤵ¤ì¤¿Ì¾Á°¤ò»ý¤Ä FLT ¥ª¥Ö¥¸¥§¥¯¥È¤òÊÖ¤¹.
2717 ´Ø¿ô mflt_get () ¤Ï¡¢$NAME ¤È¤¤¤¦Ì¾Á°¤ò»ý¤Ä FLT ¥ª¥Ö¥¸¥§¥¯¥È¤òÊÖ¤¹¡£
2720 ¤â¤·À®¸ù¤¹¤ì¤Ð¡¢mflt_get () ¤Ï¸«¤Ä¤«¤Ã¤¿ FLT
2721 ¥ª¥Ö¥¸¥§¥¯¥È¤Ø¤Î¥Ý¥¤¥ó¥¿¤òÊÖ¤¹¡£¼ºÇÔ¤·¤¿¾ì¹ç¤Ï @c NULL ¤òÊÖ¤¹¡£ */
2724 mflt_get (MSymbol name)
2729 if (! flt_list && list_flt () < 0)
2731 for (plist = flt_list; plist; plist = plist->next)
2732 if (((MFLT *) MPLIST_VAL (plist))->font_id == Mnil)
2734 flt = mplist_get (plist, name);
2735 if (! flt || ! CHECK_FLT_STAGES (flt))
2737 if (flt->name == Mcombining
2738 && ! mchartable_lookup (flt->coverage->table, 0))
2739 setup_combining_flt (flt);
2746 @brief Find an FLT suitable for the specified character and font.
2748 The mflt_find () function returns the most appropriate FLT for
2749 layouting character $C with font $FONT.
2752 If the operation was successful, mflt_find () returns a pointer
2753 to the found FLT object. Otherwise, it returns @c NULL. */
2756 @brief »ØÄꤵ¤ì¤¿Ê¸»ú¤È¥Õ¥©¥ó¥È¤Ë¹ç¤Ã¤¿ FLT ¤òõ¤¹.
2758 ´Ø¿ô mflt_find () ¤Ï¡¢Ê¸»ú $C ¤ò¥Õ¥©¥ó¥È $FONT
2759 ¤Ç¥ì¥¤¥¢¥¦¥È¤¹¤ë¤¿¤á¤ËºÇ¤âŬÀÚ¤Ê FLT ¤òÊÖ¤¹¡£
2762 ¤â¤·À®¸ù¤¹¤ì¤Ð¡¢mflt_find () ¤Ï¸«¤Ä¤«¤Ã¤¿ FLT
2763 ¥ª¥Ö¥¸¥§¥¯¥È¤Ø¤Î¥Ý¥¤¥ó¥¿¤òÊÖ¤¹¡£¼ºÇÔ¤·¤¿¾ì¹ç¤Ï @c NULL ¤òÊÖ¤¹¡£ */
2766 mflt_find (int c, MFLTFont *font)
2770 static MSymbol unicode_bmp = NULL, unicode_full = NULL;
2774 unicode_bmp = msymbol ("unicode-bmp");
2775 unicode_full = msymbol ("unicode-full");
2778 if (! flt_list && list_flt () < 0)
2780 /* Skip configured FLTs. */
2781 MPLIST_DO (plist, flt_list)
2782 if (((MFLT *) MPLIST_VAL (plist))->font_id == Mnil)
2788 MPLIST_DO (pl, plist)
2790 flt = MPLIST_VAL (pl);
2791 if (flt->registry != unicode_bmp
2792 && flt->registry != unicode_full)
2794 if (flt->family && flt->family != font->family)
2796 if (flt->name == Mcombining
2797 && ! mchartable_lookup (flt->coverage->table, 0))
2798 setup_combining_flt (flt);
2800 && ! mchartable_lookup (flt->coverage->table, c))
2804 MFLTOtfSpec *spec = &flt->otf;
2806 if (! font->check_otf)
2808 if ((spec->features[0] && spec->features[0][0] != 0xFFFFFFFF)
2809 || (spec->features[1] && spec->features[1][0] != 0xFFFFFFFF))
2812 else if (! font->check_otf (font, spec))
2825 MPLIST_DO (pl, plist)
2827 flt = MPLIST_VAL (pl);
2828 if (mchartable_lookup (flt->coverage->table, c))
2835 if (! CHECK_FLT_STAGES (flt))
2837 if (font && flt->need_config && mflt_font_id)
2838 flt = configure_flt (flt, font, mflt_font_id (font));
2844 @brief Return the name of an FLT.
2846 The mflt_name () function returns the name of $FLT. */
2849 @brief FLT ¤Î̾Á°¤òÊÖ¤¹.
2851 ´Ø¿ô mflt_name () ¤Ï $FLT ¤Î̾Á°¤òÊÖ¤¹¡£ */
2854 mflt_name (MFLT *flt)
2856 return MSYMBOL_NAME (flt->name);
2861 @brief Return a coverage of a FLT.
2863 The mflt_coverage () function returns a char-table that contains
2864 nonzero values for characters supported by $FLT. */
2867 @brief FLT ¤ÎÈϰϤòÊÖ¤¹.
2869 ´Ø¿ô mflt_coverage () ¤Ï¡¢$FLT ¤¬¥µ¥Ý¡¼¥È¤¹¤ëʸ»ú¤ËÂФ·¤Æ
2870 0 ¤Ç¤Ê¤¤Ãͤò´Þ¤àʸ»ú¥Æ¡¼¥Ö¥ë¤òÊÖ¤¹¡£ */
2873 mflt_coverage (MFLT *flt)
2875 return flt->coverage->table;
2880 @brief Layout characters with an FLT.
2882 The mflt_run () function layouts characters in $GSTRING between
2883 $FROM (inclusive) and $TO (exclusive) with $FONT. If $FLT is
2884 nonzero, it is used for all the charaters. Otherwise, appropriate
2885 FLTs are automatically chosen.
2888 The operation was successful. The value is the index to the
2889 glyph, which was previously indexed by $TO, in $GSTRING->glyphs.
2892 $GSTRING->glyphs is too short to store the result. The caller can
2893 call this fucntion again with a longer $GSTRING->glyphs.
2896 Some other error occurred. */
2899 @brief FLT ¤ò»È¤Ã¤Æʸ»ú¤ò¥ì¥¤¥¢¥¦¥È¤¹¤ë.
2901 ´Ø¿ô mflt_run () ¤Ï¡¢$GSTRING Ãæ¤Î $FROM ¤«¤é $TO ľÁ°¤Þ¤Ç¤Îʸ»ú¤ò
2902 $FONT ¤òÍѤ¤¤Æ¥ì¥¤¥¢¥¦¥È¤¹¤ë¡£¤â¤· $FLT
2903 ¤¬¥¼¥í¤Ç¤Ê¤±¤ì¤Ð¡¢¤½¤ÎÃͤò¤¹¤Ù¤Æ¤Îʸ»ú¤ËÂФ·¤ÆÍѤ¤¤ë¡£
2904 ¤½¤¦¤Ç¤Ê¤±¤ì¤ÐŬÀÚ¤Ê FLT ¤ò¼«Æ°Åª¤ËÁªÂò¤¹¤ë¡£
2907 ¼Â¹ÔÀ®¸ù¤ò¼¨¤¹¡£ÊÖ¤µ¤ì¤ëÃͤϡ¢$GSTRING->glyphs Ãæ¤Ç°ÊÁ° $TO
2908 ¤Ë¤è¤Ã¤Æ¼¨¤µ¤ì¤Æ¤¤¤¿¥°¥ê¥Õ¤Ø¤Î¥¤¥ó¥Ç¥¯¥¹¤Ç¤¢¤ë¡£
2911 ·ë²Ì¤ò³ÊǼ¤¹¤ë¤Ë¤Ï $GSTRING->glyphs ¤¬Ã»¤¹¤®¤ë¤³¤È¤ò¼¨¤¹¡£
2912 ¸Æ¤Ó½Ð¤·Â¦¤Ï¡¢¤è¤êŤ¤ $GSTRING->glyphs
2913 ¤òÍѤ¤¤ÆºÆÅÙ¤³¤Î´Ø¿ô¤ò¸Æ¤Ö¤³¤È¤¬¤Ç¤¤ë¡£
2916 ¤½¤Î¾¤Î¥¨¥é¡¼¤¬µ¯¤¤¿¤³¤È¤ò¼¨¤¹¡£ */
2919 mflt_run (MFLTGlyphString *gstring, int from, int to,
2920 MFLTFont *font, MFLT *flt)
2922 FontLayoutContext ctx;
2923 int match_indices[NMATCH];
2925 MFLTGlyphString out;
2926 int auto_flt = ! flt;
2928 int this_from, this_to;
2929 MSymbol font_id = mflt_font_id ? mflt_font_id (font) : Mnil;
2933 /* This is usually sufficient, but if not, we retry with the larger
2934 values at most 3 times. This value is also used for the
2935 allocating size of ctx.encoded. */
2936 out.allocated = (to - from) * 4;
2938 for (i = from; i < to; i++)
2940 g = GREF (gstring, i);
2944 memset (g, 0, sizeof (MFLTGlyph));
2947 g->from = g->to = i;
2950 for (this_from = from; this_from < to;)
2954 for (this_to = this_from; this_to < to; this_to++)
2955 if (mchartable_lookup (flt->coverage->table,
2956 GREF (gstring, this_to)->c))
2961 if (! flt_list && list_flt () < 0)
2963 font->get_glyph_id (font, gstring, this_from, to);
2964 font->get_metrics (font, gstring, this_from, to);
2968 for (this_to = this_from; this_to < to; this_to++)
2970 c = GREF (gstring, this_to)->c;
2971 if (c >= flt_min_coverage && c <= flt_max_coverage)
2974 for (; this_to < to; this_to++)
2976 c = GREF (gstring, this_to)->c;
2978 && mchartable_lookup (((MFLT *) font->internal)->coverage->table, c))
2980 flt = font->internal;
2983 flt = mflt_find (c, font);
2986 if (CHECK_FLT_STAGES (flt))
2988 font->internal = flt;
2995 if (this_from < this_to)
2997 font->get_glyph_id (font, gstring, this_from, this_to);
2998 font->get_metrics (font, gstring, this_from, this_to);
2999 this_from = this_to;
3004 MDEBUG_PRINT1 (" [FLT] (%s", MSYMBOL_NAME (flt->name));
3006 if (flt->need_config && font_id != Mnil)
3007 flt = configure_flt (flt, font, font_id);
3009 for (; this_to < to; this_to++)
3012 g = GREF (gstring, this_to);
3013 enc = (int) mchartable_lookup (flt->coverage->table, g->c);
3016 SET_CATEGORY_CODE (g, enc);
3022 MDEBUG_PRINT1 (" (%s)", MSYMBOL_NAME (font->family));
3023 MDEBUG_PRINT ("\n [FLT] (SOURCE");
3024 for (i = this_from, j = 0; i < this_to; i++, j++)
3026 if (j > 0 && j % 8 == 0)
3027 MDEBUG_PRINT ("\n [FLT] ");
3028 MDEBUG_PRINT1 (" %04X", GREF (gstring, i)->c);
3033 for (i = 0; i < 3; i++)
3036 memset (&ctx, 0, sizeof ctx);
3037 ctx.match_indices = match_indices;
3039 ctx.cluster_begin_idx = -1;
3042 j = run_stages (gstring, this_from, this_to, flt, &ctx);
3056 MDEBUG_PRINT ("\n [FLT] (RESULT");
3057 if (MDEBUG_FLAG () > 1)
3058 for (i = 0; this_from < this_to; this_from++, i++)
3060 if (i > 0 && i % 4 == 0)
3061 MDEBUG_PRINT ("\n [FLT] ");
3062 g = GREF (gstring, this_from);
3063 MDEBUG_PRINT4 (" (%04X %d %d %d)",
3064 g->code, g->xadv, g->xoff, g->yoff);
3067 for (; this_from < this_to; this_from++)
3068 MDEBUG_PRINT1 (" %04X", GREF (gstring, this_from)->code);
3069 MDEBUG_PRINT ("))\n");
3071 this_from = this_to;
3076 int len = to - from;
3079 memcpy (((char *) out.glyphs),
3080 ((char *) gstring->glyphs) + gstring->glyph_size * from,
3081 gstring->glyph_size * len);
3082 for (i = from, j = to; i < to;)
3084 for (k = i + 1, j--; k < to && GREF (&out, k)->xadv == 0;
3086 GCPY (&out, i, (k - i), gstring, j);
3094 int mflt_enable_new_feature;
3096 int (*mflt_iterate_otf_feature) (struct _MFLTFont *font,
3099 unsigned char *table);
3101 MSymbol (*mflt_font_id) (struct _MFLTFont *font);
3103 int (*mflt_try_otf) (struct _MFLTFont *font, MFLTOtfSpec *spec,
3104 MFLTGlyphString *gstring, int from, int to);
3107 /* for debugging... */
3110 dump_flt_cmd (FontLayoutStage *stage, int id, int indent)
3112 char *prefix = (char *) alloca (indent + 1);
3114 memset (prefix, 32, indent);
3118 fprintf (stderr, "0x%02X", id);
3119 else if (id <= CMD_ID_OFFSET_INDEX)
3121 int idx = CMD_ID_TO_INDEX (id);
3122 FontLayoutCmd *cmd = stage->cmds + idx;
3124 if (cmd->type == FontLayoutCmdTypeRule)
3126 FontLayoutCmdRule *rule = &cmd->body.rule;
3129 fprintf (stderr, "(rule ");
3130 if (rule->src_type == SRC_REGEX)
3131 fprintf (stderr, "\"%s\"", rule->src.re.pattern);
3132 else if (rule->src_type == SRC_INDEX)
3133 fprintf (stderr, "%d", rule->src.match_idx);
3134 else if (rule->src_type == SRC_SEQ)
3135 fprintf (stderr, "(seq)");
3136 else if (rule->src_type == SRC_RANGE)
3137 fprintf (stderr, "(range)");
3139 fprintf (stderr, "(invalid src)");
3141 for (i = 0; i < rule->n_cmds; i++)
3143 fprintf (stderr, "\n%s ", prefix);
3144 dump_flt_cmd (stage, rule->cmd_ids[i], indent + 2);
3146 fprintf (stderr, ")");
3148 else if (cmd->type == FontLayoutCmdTypeCond)
3150 FontLayoutCmdCond *cond = &cmd->body.cond;
3153 fprintf (stderr, "(cond");
3154 for (i = 0; i < cond->n_cmds; i++)
3156 fprintf (stderr, "\n%s ", prefix);
3157 dump_flt_cmd (stage, cond->cmd_ids[i], indent + 2);
3159 fprintf (stderr, ")");
3161 else if (cmd->type == FontLayoutCmdTypeOTF)
3163 fprintf (stderr, "(otf)");
3166 fprintf (stderr, "(error-command)");
3168 else if (id <= CMD_ID_OFFSET_COMBINING)
3169 fprintf (stderr, "cominging-code");
3171 fprintf (stderr, "(predefiend %d)", id);
3175 @brief Dump a Font Layout Table.
3177 The mdebug_dump_flt () function prints the Font Layout Table $FLT
3178 in a human readable way to the stderr. $INDENT specifies how many
3179 columns to indent the lines but the first one.
3182 This function returns $FLT. */
3185 mdebug_dump_flt (MFLT *flt, int indent)
3187 char *prefix = (char *) alloca (indent + 1);
3191 memset (prefix, 32, indent);
3193 fprintf (stderr, "(flt");
3194 MPLIST_DO (plist, flt->stages)
3196 FontLayoutStage *stage = (FontLayoutStage *) MPLIST_VAL (plist);
3199 fprintf (stderr, "\n%s (stage %d", prefix, stage_idx);
3200 for (i = 0; i < stage->used; i++)
3202 fprintf (stderr, "\n%s ", prefix);
3203 dump_flt_cmd (stage, INDEX_TO_CMD_ID (i), indent + 4);
3205 fprintf (stderr, ")");
3208 fprintf (stderr, ")");
3213 mflt_dump_gstring (MFLTGlyphString *gstring)
3217 fprintf (stderr, "(flt-gstring");
3218 for (i = 0; i < gstring->used; i++)
3220 MFLTGlyph *g = GREF (gstring, i);
3221 fprintf (stderr, "\n (%02d pos:%d-%d c:%04X code:%04X cat:%c)",
3222 i, g->from, g->to, g->c, g->code, GET_CATEGORY_CODE (g));
3224 fprintf (stderr, ")\n");