86 hb_buffer_t *buffer);
87
88 static void
89 collect_features_myanmar (hb_ot_shape_planner_t *plan)
90 {
91 hb_ot_map_builder_t *map = &plan->map;
92
93 /* Do this before any lookups have been applied. */
94 map->add_gsub_pause (setup_syllables);
95
96 map->add_global_bool_feature (HB_TAG('l','o','c','l'));
97 /* The Indic specs do not require ccmp, but we apply it here since if
98 * there is a use of it, it's typically at the beginning. */
99 map->add_global_bool_feature (HB_TAG('c','c','m','p'));
100
101
102 map->add_gsub_pause (initial_reordering);
103 for (unsigned int i = 0; i < ARRAY_LENGTH (basic_features); i++)
104 {
105 map->add_feature (basic_features[i], 1, F_GLOBAL | F_MANUAL_ZWJ);
106 map->add_gsub_pause (NULL);
107 }
108 map->add_gsub_pause (final_reordering);
109 for (unsigned int i = 0; i < ARRAY_LENGTH (other_features); i++)
110 map->add_feature (other_features[i], 1, F_GLOBAL | F_MANUAL_ZWJ);
111 }
112
113 static void
114 override_features_myanmar (hb_ot_shape_planner_t *plan)
115 {
116 plan->map.add_feature (HB_TAG('l','i','g','a'), 0, F_GLOBAL);
117 }
118
119
120 enum syllable_type_t {
121 consonant_syllable,
122 punctuation_cluster,
123 broken_cluster,
124 non_myanmar_cluster,
125 };
126
127 #include "hb-ot-shape-complex-myanmar-machine.hh"
128
129
130 /* Note: This enum is duplicated in the -machine.rl source file.
131 * Not sure how to avoid duplication. */
132 enum myanmar_category_t {
133 OT_As = 18, /* Asat */
134 OT_D = 19, /* Digits except zero */
135 OT_D0 = 20, /* Digit zero */
136 OT_DB = OT_N, /* Dot below */
137 OT_GB = OT_PLACEHOLDER,
138 OT_MH = 21, /* Various consonant medial types */
139 OT_MR = 22, /* Various consonant medial types */
140 OT_MW = 23, /* Various consonant medial types */
141 OT_MY = 24, /* Various consonant medial types */
142 OT_PT = 25, /* Pwo and other tones */
143 OT_VAbv = 26,
144 OT_VBlw = 27,
145 OT_VPre = 28,
146 OT_VPst = 29,
147 OT_VS = 30, /* Variation selectors */
148 OT_P = 31 /* Punctuation */
149 };
150
151
152 static inline bool
153 is_one_of (const hb_glyph_info_t &info, unsigned int flags)
154 {
155 /* If it ligated, all bets are off. */
156 if (_hb_glyph_info_ligated (&info)) return false;
157 return !!(FLAG_SAFE (info.myanmar_category()) & flags);
158 }
159
160 static inline bool
161 is_consonant (const hb_glyph_info_t &info)
162 {
163 return is_one_of (info, CONSONANT_FLAGS);
164 }
165
166
167 static inline void
168 set_myanmar_properties (hb_glyph_info_t &info)
169 {
170 hb_codepoint_t u = info.codepoint;
171 unsigned int type = hb_indic_get_categories (u);
172 indic_category_t cat = (indic_category_t) (type & 0x7Fu);
173 indic_position_t pos = (indic_position_t) (type >> 8);
174
175 /* Myanmar
176 * http://www.microsoft.com/typography/OpenTypeDev/myanmar/intro.htm#analyze
177 */
178 if (unlikely (hb_in_range (u, 0xFE00u, 0xFE0Fu)))
179 cat = (indic_category_t) OT_VS;
180
181 switch (u)
182 {
183 case 0x104Eu:
184 cat = (indic_category_t) OT_C; /* The spec says C, IndicSyllableCategory doesn't have. */
185 break;
186
187 case 0x002Du: case 0x00A0u: case 0x00D7u: case 0x2012u:
188 case 0x2013u: case 0x2014u: case 0x2015u: case 0x2022u:
189 case 0x25CCu: case 0x25FBu: case 0x25FCu: case 0x25FDu:
190 case 0x25FEu:
191 cat = (indic_category_t) OT_GB;
192 break;
193
194 case 0x1004u: case 0x101Bu: case 0x105Au:
195 cat = (indic_category_t) OT_Ra;
196 break;
197
198 case 0x1032u: case 0x1036u:
280 hb_font_t *font HB_UNUSED)
281 {
282 HB_BUFFER_ALLOCATE_VAR (buffer, myanmar_category);
283 HB_BUFFER_ALLOCATE_VAR (buffer, myanmar_position);
284
285 /* We cannot setup masks here. We save information about characters
286 * and setup masks later on in a pause-callback. */
287
288 unsigned int count = buffer->len;
289 hb_glyph_info_t *info = buffer->info;
290 for (unsigned int i = 0; i < count; i++)
291 set_myanmar_properties (info[i]);
292 }
293
294 static void
295 setup_syllables (const hb_ot_shape_plan_t *plan HB_UNUSED,
296 hb_font_t *font HB_UNUSED,
297 hb_buffer_t *buffer)
298 {
299 find_syllables (buffer);
300 }
301
302 static int
303 compare_myanmar_order (const hb_glyph_info_t *pa, const hb_glyph_info_t *pb)
304 {
305 int a = pa->myanmar_position();
306 int b = pb->myanmar_position();
307
308 return a < b ? -1 : a == b ? 0 : +1;
309 }
310
311
312 /* Rules from:
313 * http://www.microsoft.com/typography/OpenTypeDev/myanmar/intro.htm */
314
315 static void
316 initial_reordering_consonant_syllable (hb_buffer_t *buffer,
317 unsigned int start, unsigned int end)
318 {
319 hb_glyph_info_t *info = buffer->info;
493 final_reordering (const hb_ot_shape_plan_t *plan,
494 hb_font_t *font HB_UNUSED,
495 hb_buffer_t *buffer)
496 {
497 hb_glyph_info_t *info = buffer->info;
498 unsigned int count = buffer->len;
499
500 /* Zero syllables now... */
501 for (unsigned int i = 0; i < count; i++)
502 info[i].syllable() = 0;
503
504 HB_BUFFER_DEALLOCATE_VAR (buffer, myanmar_category);
505 HB_BUFFER_DEALLOCATE_VAR (buffer, myanmar_position);
506 }
507
508
509 /* Uniscribe seems to have a shaper for 'mymr' that is like the
510 * generic shaper, except that it zeros mark advances GDEF_LATE. */
511 const hb_ot_complex_shaper_t _hb_ot_complex_shaper_myanmar_old =
512 {
513 "default",
514 NULL, /* collect_features */
515 NULL, /* override_features */
516 NULL, /* data_create */
517 NULL, /* data_destroy */
518 NULL, /* preprocess_text */
519 NULL, /* postprocess_glyphs */
520 HB_OT_SHAPE_NORMALIZATION_MODE_DEFAULT,
521 NULL, /* decompose */
522 NULL, /* compose */
523 NULL, /* setup_masks */
524 NULL, /* disable_otl */
525 HB_OT_SHAPE_ZERO_WIDTH_MARKS_BY_GDEF_LATE,
526 true, /* fallback_position */
527 };
528
529 const hb_ot_complex_shaper_t _hb_ot_complex_shaper_myanmar =
530 {
531 "myanmar",
532 collect_features_myanmar,
533 override_features_myanmar,
534 NULL, /* data_create */
535 NULL, /* data_destroy */
536 NULL, /* preprocess_text */
537 NULL, /* postprocess_glyphs */
538 HB_OT_SHAPE_NORMALIZATION_MODE_COMPOSED_DIACRITICS_NO_SHORT_CIRCUIT,
539 NULL, /* decompose */
540 NULL, /* compose */
541 setup_masks_myanmar,
542 NULL, /* disable_otl */
543 HB_OT_SHAPE_ZERO_WIDTH_MARKS_BY_GDEF_EARLY,
544 false, /* fallback_position */
545 };
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86 hb_buffer_t *buffer);
87
88 static void
89 collect_features_myanmar (hb_ot_shape_planner_t *plan)
90 {
91 hb_ot_map_builder_t *map = &plan->map;
92
93 /* Do this before any lookups have been applied. */
94 map->add_gsub_pause (setup_syllables);
95
96 map->add_global_bool_feature (HB_TAG('l','o','c','l'));
97 /* The Indic specs do not require ccmp, but we apply it here since if
98 * there is a use of it, it's typically at the beginning. */
99 map->add_global_bool_feature (HB_TAG('c','c','m','p'));
100
101
102 map->add_gsub_pause (initial_reordering);
103 for (unsigned int i = 0; i < ARRAY_LENGTH (basic_features); i++)
104 {
105 map->add_feature (basic_features[i], 1, F_GLOBAL | F_MANUAL_ZWJ);
106 map->add_gsub_pause (nullptr);
107 }
108 map->add_gsub_pause (final_reordering);
109 for (unsigned int i = 0; i < ARRAY_LENGTH (other_features); i++)
110 map->add_feature (other_features[i], 1, F_GLOBAL | F_MANUAL_ZWJ);
111 }
112
113 static void
114 override_features_myanmar (hb_ot_shape_planner_t *plan)
115 {
116 plan->map.add_feature (HB_TAG('l','i','g','a'), 0, F_GLOBAL);
117 }
118
119
120 enum syllable_type_t {
121 consonant_syllable,
122 punctuation_cluster,
123 broken_cluster,
124 non_myanmar_cluster,
125 };
126
127 #include "hb-ot-shape-complex-myanmar-machine.hh"
128
129
130 /* Note: This enum is duplicated in the -machine.rl source file.
131 * Not sure how to avoid duplication. */
132 enum myanmar_category_t {
133 OT_As = 18, /* Asat */
134 OT_D0 = 20, /* Digit zero */
135 OT_DB = OT_N, /* Dot below */
136 OT_GB = OT_PLACEHOLDER,
137 OT_MH = 21, /* Various consonant medial types */
138 OT_MR = 22, /* Various consonant medial types */
139 OT_MW = 23, /* Various consonant medial types */
140 OT_MY = 24, /* Various consonant medial types */
141 OT_PT = 25, /* Pwo and other tones */
142 OT_VAbv = 26,
143 OT_VBlw = 27,
144 OT_VPre = 28,
145 OT_VPst = 29,
146 OT_VS = 30, /* Variation selectors */
147 OT_P = 31, /* Punctuation */
148 OT_D = 32, /* Digits except zero */
149 };
150
151
152 static inline bool
153 is_one_of (const hb_glyph_info_t &info, unsigned int flags)
154 {
155 /* If it ligated, all bets are off. */
156 if (_hb_glyph_info_ligated (&info)) return false;
157 return !!(FLAG_UNSAFE (info.myanmar_category()) & flags);
158 }
159
160 static inline bool
161 is_consonant (const hb_glyph_info_t &info)
162 {
163 return is_one_of (info, CONSONANT_FLAGS);
164 }
165
166
167 static inline void
168 set_myanmar_properties (hb_glyph_info_t &info)
169 {
170 hb_codepoint_t u = info.codepoint;
171 unsigned int type = hb_indic_get_categories (u);
172 indic_category_t cat = (indic_category_t) (type & 0x7Fu);
173 indic_position_t pos = (indic_position_t) (type >> 8);
174
175 /* Myanmar
176 * http://www.microsoft.com/typography/OpenTypeDev/myanmar/intro.htm#analyze
177 */
178 if (unlikely (hb_in_range<hb_codepoint_t> (u, 0xFE00u, 0xFE0Fu)))
179 cat = (indic_category_t) OT_VS;
180
181 switch (u)
182 {
183 case 0x104Eu:
184 cat = (indic_category_t) OT_C; /* The spec says C, IndicSyllableCategory doesn't have. */
185 break;
186
187 case 0x002Du: case 0x00A0u: case 0x00D7u: case 0x2012u:
188 case 0x2013u: case 0x2014u: case 0x2015u: case 0x2022u:
189 case 0x25CCu: case 0x25FBu: case 0x25FCu: case 0x25FDu:
190 case 0x25FEu:
191 cat = (indic_category_t) OT_GB;
192 break;
193
194 case 0x1004u: case 0x101Bu: case 0x105Au:
195 cat = (indic_category_t) OT_Ra;
196 break;
197
198 case 0x1032u: case 0x1036u:
280 hb_font_t *font HB_UNUSED)
281 {
282 HB_BUFFER_ALLOCATE_VAR (buffer, myanmar_category);
283 HB_BUFFER_ALLOCATE_VAR (buffer, myanmar_position);
284
285 /* We cannot setup masks here. We save information about characters
286 * and setup masks later on in a pause-callback. */
287
288 unsigned int count = buffer->len;
289 hb_glyph_info_t *info = buffer->info;
290 for (unsigned int i = 0; i < count; i++)
291 set_myanmar_properties (info[i]);
292 }
293
294 static void
295 setup_syllables (const hb_ot_shape_plan_t *plan HB_UNUSED,
296 hb_font_t *font HB_UNUSED,
297 hb_buffer_t *buffer)
298 {
299 find_syllables (buffer);
300 foreach_syllable (buffer, start, end)
301 buffer->unsafe_to_break (start, end);
302 }
303
304 static int
305 compare_myanmar_order (const hb_glyph_info_t *pa, const hb_glyph_info_t *pb)
306 {
307 int a = pa->myanmar_position();
308 int b = pb->myanmar_position();
309
310 return a < b ? -1 : a == b ? 0 : +1;
311 }
312
313
314 /* Rules from:
315 * http://www.microsoft.com/typography/OpenTypeDev/myanmar/intro.htm */
316
317 static void
318 initial_reordering_consonant_syllable (hb_buffer_t *buffer,
319 unsigned int start, unsigned int end)
320 {
321 hb_glyph_info_t *info = buffer->info;
495 final_reordering (const hb_ot_shape_plan_t *plan,
496 hb_font_t *font HB_UNUSED,
497 hb_buffer_t *buffer)
498 {
499 hb_glyph_info_t *info = buffer->info;
500 unsigned int count = buffer->len;
501
502 /* Zero syllables now... */
503 for (unsigned int i = 0; i < count; i++)
504 info[i].syllable() = 0;
505
506 HB_BUFFER_DEALLOCATE_VAR (buffer, myanmar_category);
507 HB_BUFFER_DEALLOCATE_VAR (buffer, myanmar_position);
508 }
509
510
511 /* Uniscribe seems to have a shaper for 'mymr' that is like the
512 * generic shaper, except that it zeros mark advances GDEF_LATE. */
513 const hb_ot_complex_shaper_t _hb_ot_complex_shaper_myanmar_old =
514 {
515 nullptr, /* collect_features */
516 nullptr, /* override_features */
517 nullptr, /* data_create */
518 nullptr, /* data_destroy */
519 nullptr, /* preprocess_text */
520 nullptr, /* postprocess_glyphs */
521 HB_OT_SHAPE_NORMALIZATION_MODE_DEFAULT,
522 nullptr, /* decompose */
523 nullptr, /* compose */
524 nullptr, /* setup_masks */
525 nullptr, /* disable_otl */
526 nullptr, /* reorder_marks */
527 HB_OT_SHAPE_ZERO_WIDTH_MARKS_BY_GDEF_LATE,
528 true, /* fallback_position */
529 };
530
531 const hb_ot_complex_shaper_t _hb_ot_complex_shaper_myanmar =
532 {
533 collect_features_myanmar,
534 override_features_myanmar,
535 nullptr, /* data_create */
536 nullptr, /* data_destroy */
537 nullptr, /* preprocess_text */
538 nullptr, /* postprocess_glyphs */
539 HB_OT_SHAPE_NORMALIZATION_MODE_COMPOSED_DIACRITICS_NO_SHORT_CIRCUIT,
540 nullptr, /* decompose */
541 nullptr, /* compose */
542 setup_masks_myanmar,
543 nullptr, /* disable_otl */
544 nullptr, /* reorder_marks */
545 HB_OT_SHAPE_ZERO_WIDTH_MARKS_BY_GDEF_EARLY,
546 false, /* fallback_position */
547 };
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