diff options
Diffstat (limited to 'src/3rdparty/harfbuzz-ng/src/hb-ot-shape-complex-myanmar.cc')
-rw-r--r-- | src/3rdparty/harfbuzz-ng/src/hb-ot-shape-complex-myanmar.cc | 547 |
1 files changed, 0 insertions, 547 deletions
diff --git a/src/3rdparty/harfbuzz-ng/src/hb-ot-shape-complex-myanmar.cc b/src/3rdparty/harfbuzz-ng/src/hb-ot-shape-complex-myanmar.cc deleted file mode 100644 index 5ea1dbff27..0000000000 --- a/src/3rdparty/harfbuzz-ng/src/hb-ot-shape-complex-myanmar.cc +++ /dev/null @@ -1,547 +0,0 @@ -/* - * Copyright © 2011,2012,2013 Google, Inc. - * - * This is part of HarfBuzz, a text shaping library. - * - * Permission is hereby granted, without written agreement and without - * license or royalty fees, to use, copy, modify, and distribute this - * software and its documentation for any purpose, provided that the - * above copyright notice and the following two paragraphs appear in - * all copies of this software. - * - * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR - * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES - * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN - * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH - * DAMAGE. - * - * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, - * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND - * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS - * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO - * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. - * - * Google Author(s): Behdad Esfahbod - */ - -#include "hb-ot-shape-complex-indic-private.hh" - -/* buffer var allocations */ -#define myanmar_category() complex_var_u8_0() /* myanmar_category_t */ -#define myanmar_position() complex_var_u8_1() /* myanmar_position_t */ - - -/* - * Myanmar shaper. - */ - -static const hb_tag_t -basic_features[] = -{ - /* - * Basic features. - * These features are applied in order, one at a time, after initial_reordering. - */ - HB_TAG('r','p','h','f'), - HB_TAG('p','r','e','f'), - HB_TAG('b','l','w','f'), - HB_TAG('p','s','t','f'), -}; -static const hb_tag_t -other_features[] = -{ - /* - * Other features. - * These features are applied all at once, after final_reordering. - */ - HB_TAG('p','r','e','s'), - HB_TAG('a','b','v','s'), - HB_TAG('b','l','w','s'), - HB_TAG('p','s','t','s'), - /* Positioning features, though we don't care about the types. */ - HB_TAG('d','i','s','t'), - /* Pre-release version of Windows 8 Myanmar font had abvm,blwm - * features. The released Windows 8 version of the font (as well - * as the released spec) used 'mark' instead. The Windows 8 - * shaper however didn't apply 'mark' but did apply 'mkmk'. - * Perhaps it applied abvm/blwm. This was fixed in a Windows 8 - * update, so now it applies mark/mkmk. We are guessing that - * it still applies abvm/blwm too. - */ - HB_TAG('a','b','v','m'), - HB_TAG('b','l','w','m'), -}; - -static void -setup_syllables (const hb_ot_shape_plan_t *plan, - hb_font_t *font, - hb_buffer_t *buffer); -static void -initial_reordering (const hb_ot_shape_plan_t *plan, - hb_font_t *font, - hb_buffer_t *buffer); -static void -final_reordering (const hb_ot_shape_plan_t *plan, - hb_font_t *font, - hb_buffer_t *buffer); - -static void -collect_features_myanmar (hb_ot_shape_planner_t *plan) -{ - hb_ot_map_builder_t *map = &plan->map; - - /* Do this before any lookups have been applied. */ - map->add_gsub_pause (setup_syllables); - - map->add_global_bool_feature (HB_TAG('l','o','c','l')); - /* The Indic specs do not require ccmp, but we apply it here since if - * there is a use of it, it's typically at the beginning. */ - map->add_global_bool_feature (HB_TAG('c','c','m','p')); - - - map->add_gsub_pause (initial_reordering); - for (unsigned int i = 0; i < ARRAY_LENGTH (basic_features); i++) - { - map->add_feature (basic_features[i], 1, F_GLOBAL | F_MANUAL_ZWJ); - map->add_gsub_pause (nullptr); - } - map->add_gsub_pause (final_reordering); - for (unsigned int i = 0; i < ARRAY_LENGTH (other_features); i++) - map->add_feature (other_features[i], 1, F_GLOBAL | F_MANUAL_ZWJ); -} - -static void -override_features_myanmar (hb_ot_shape_planner_t *plan) -{ - plan->map.add_feature (HB_TAG('l','i','g','a'), 0, F_GLOBAL); -} - - -enum syllable_type_t { - consonant_syllable, - punctuation_cluster, - broken_cluster, - non_myanmar_cluster, -}; - -#include "hb-ot-shape-complex-myanmar-machine.hh" - - -/* Note: This enum is duplicated in the -machine.rl source file. - * Not sure how to avoid duplication. */ -enum myanmar_category_t { - OT_As = 18, /* Asat */ - OT_D0 = 20, /* Digit zero */ - OT_DB = OT_N, /* Dot below */ - OT_GB = OT_PLACEHOLDER, - OT_MH = 21, /* Various consonant medial types */ - OT_MR = 22, /* Various consonant medial types */ - OT_MW = 23, /* Various consonant medial types */ - OT_MY = 24, /* Various consonant medial types */ - OT_PT = 25, /* Pwo and other tones */ - OT_VAbv = 26, - OT_VBlw = 27, - OT_VPre = 28, - OT_VPst = 29, - OT_VS = 30, /* Variation selectors */ - OT_P = 31, /* Punctuation */ - OT_D = 32, /* Digits except zero */ -}; - - -static inline bool -is_one_of (const hb_glyph_info_t &info, unsigned int flags) -{ - /* If it ligated, all bets are off. */ - if (_hb_glyph_info_ligated (&info)) return false; - return !!(FLAG_UNSAFE (info.myanmar_category()) & flags); -} - -static inline bool -is_consonant (const hb_glyph_info_t &info) -{ - return is_one_of (info, CONSONANT_FLAGS); -} - - -static inline void -set_myanmar_properties (hb_glyph_info_t &info) -{ - hb_codepoint_t u = info.codepoint; - unsigned int type = hb_indic_get_categories (u); - indic_category_t cat = (indic_category_t) (type & 0x7Fu); - indic_position_t pos = (indic_position_t) (type >> 8); - - /* Myanmar - * http://www.microsoft.com/typography/OpenTypeDev/myanmar/intro.htm#analyze - */ - if (unlikely (hb_in_range<hb_codepoint_t> (u, 0xFE00u, 0xFE0Fu))) - cat = (indic_category_t) OT_VS; - - switch (u) - { - case 0x104Eu: - cat = (indic_category_t) OT_C; /* The spec says C, IndicSyllableCategory doesn't have. */ - break; - - case 0x002Du: case 0x00A0u: case 0x00D7u: case 0x2012u: - case 0x2013u: case 0x2014u: case 0x2015u: case 0x2022u: - case 0x25CCu: case 0x25FBu: case 0x25FCu: case 0x25FDu: - case 0x25FEu: - cat = (indic_category_t) OT_GB; - break; - - case 0x1004u: case 0x101Bu: case 0x105Au: - cat = (indic_category_t) OT_Ra; - break; - - case 0x1032u: case 0x1036u: - cat = (indic_category_t) OT_A; - break; - - case 0x1039u: - cat = (indic_category_t) OT_H; - break; - - case 0x103Au: - cat = (indic_category_t) OT_As; - break; - - case 0x1041u: case 0x1042u: case 0x1043u: case 0x1044u: - case 0x1045u: case 0x1046u: case 0x1047u: case 0x1048u: - case 0x1049u: case 0x1090u: case 0x1091u: case 0x1092u: - case 0x1093u: case 0x1094u: case 0x1095u: case 0x1096u: - case 0x1097u: case 0x1098u: case 0x1099u: - cat = (indic_category_t) OT_D; - break; - - case 0x1040u: - cat = (indic_category_t) OT_D; /* XXX The spec says D0, but Uniscribe doesn't seem to do. */ - break; - - case 0x103Eu: case 0x1060u: - cat = (indic_category_t) OT_MH; - break; - - case 0x103Cu: - cat = (indic_category_t) OT_MR; - break; - - case 0x103Du: case 0x1082u: - cat = (indic_category_t) OT_MW; - break; - - case 0x103Bu: case 0x105Eu: case 0x105Fu: - cat = (indic_category_t) OT_MY; - break; - - case 0x1063u: case 0x1064u: case 0x1069u: case 0x106Au: - case 0x106Bu: case 0x106Cu: case 0x106Du: case 0xAA7Bu: - cat = (indic_category_t) OT_PT; - break; - - case 0x1038u: case 0x1087u: case 0x1088u: case 0x1089u: - case 0x108Au: case 0x108Bu: case 0x108Cu: case 0x108Du: - case 0x108Fu: case 0x109Au: case 0x109Bu: case 0x109Cu: - cat = (indic_category_t) OT_SM; - break; - - case 0x104Au: case 0x104Bu: - cat = (indic_category_t) OT_P; - break; - - case 0xAA74u: case 0xAA75u: case 0xAA76u: - /* https://github.com/roozbehp/unicode-data/issues/3 */ - cat = (indic_category_t) OT_C; - break; - } - - if (cat == OT_M) - { - switch ((int) pos) - { - case POS_PRE_C: cat = (indic_category_t) OT_VPre; - pos = POS_PRE_M; break; - case POS_ABOVE_C: cat = (indic_category_t) OT_VAbv; break; - case POS_BELOW_C: cat = (indic_category_t) OT_VBlw; break; - case POS_POST_C: cat = (indic_category_t) OT_VPst; break; - } - } - - info.myanmar_category() = (myanmar_category_t) cat; - info.myanmar_position() = pos; -} - - - -static void -setup_masks_myanmar (const hb_ot_shape_plan_t *plan HB_UNUSED, - hb_buffer_t *buffer, - hb_font_t *font HB_UNUSED) -{ - HB_BUFFER_ALLOCATE_VAR (buffer, myanmar_category); - HB_BUFFER_ALLOCATE_VAR (buffer, myanmar_position); - - /* We cannot setup masks here. We save information about characters - * and setup masks later on in a pause-callback. */ - - unsigned int count = buffer->len; - hb_glyph_info_t *info = buffer->info; - for (unsigned int i = 0; i < count; i++) - set_myanmar_properties (info[i]); -} - -static void -setup_syllables (const hb_ot_shape_plan_t *plan HB_UNUSED, - hb_font_t *font HB_UNUSED, - hb_buffer_t *buffer) -{ - find_syllables (buffer); - foreach_syllable (buffer, start, end) - buffer->unsafe_to_break (start, end); -} - -static int -compare_myanmar_order (const hb_glyph_info_t *pa, const hb_glyph_info_t *pb) -{ - int a = pa->myanmar_position(); - int b = pb->myanmar_position(); - - return a < b ? -1 : a == b ? 0 : +1; -} - - -/* Rules from: - * http://www.microsoft.com/typography/OpenTypeDev/myanmar/intro.htm */ - -static void -initial_reordering_consonant_syllable (hb_buffer_t *buffer, - unsigned int start, unsigned int end) -{ - hb_glyph_info_t *info = buffer->info; - - unsigned int base = end; - bool has_reph = false; - - { - unsigned int limit = start; - if (start + 3 <= end && - info[start ].myanmar_category() == OT_Ra && - info[start+1].myanmar_category() == OT_As && - info[start+2].myanmar_category() == OT_H) - { - limit += 3; - base = start; - has_reph = true; - } - - { - if (!has_reph) - base = limit; - - for (unsigned int i = limit; i < end; i++) - if (is_consonant (info[i])) - { - base = i; - break; - } - } - } - - /* Reorder! */ - { - unsigned int i = start; - for (; i < start + (has_reph ? 3 : 0); i++) - info[i].myanmar_position() = POS_AFTER_MAIN; - for (; i < base; i++) - info[i].myanmar_position() = POS_PRE_C; - if (i < end) - { - info[i].myanmar_position() = POS_BASE_C; - i++; - } - indic_position_t pos = POS_AFTER_MAIN; - /* The following loop may be ugly, but it implements all of - * Myanmar reordering! */ - for (; i < end; i++) - { - if (info[i].myanmar_category() == OT_MR) /* Pre-base reordering */ - { - info[i].myanmar_position() = POS_PRE_C; - continue; - } - if (info[i].myanmar_position() < POS_BASE_C) /* Left matra */ - { - continue; - } - - if (pos == POS_AFTER_MAIN && info[i].myanmar_category() == OT_VBlw) - { - pos = POS_BELOW_C; - info[i].myanmar_position() = pos; - continue; - } - - if (pos == POS_BELOW_C && info[i].myanmar_category() == OT_A) - { - info[i].myanmar_position() = POS_BEFORE_SUB; - continue; - } - if (pos == POS_BELOW_C && info[i].myanmar_category() == OT_VBlw) - { - info[i].myanmar_position() = pos; - continue; - } - if (pos == POS_BELOW_C && info[i].myanmar_category() != OT_A) - { - pos = POS_AFTER_SUB; - info[i].myanmar_position() = pos; - continue; - } - info[i].myanmar_position() = pos; - } - } - - /* Sit tight, rock 'n roll! */ - buffer->sort (start, end, compare_myanmar_order); -} - -static void -initial_reordering_syllable (const hb_ot_shape_plan_t *plan, - hb_face_t *face, - hb_buffer_t *buffer, - unsigned int start, unsigned int end) -{ - syllable_type_t syllable_type = (syllable_type_t) (buffer->info[start].syllable() & 0x0F); - switch (syllable_type) { - - case broken_cluster: /* We already inserted dotted-circles, so just call the consonant_syllable. */ - case consonant_syllable: - initial_reordering_consonant_syllable (buffer, start, end); - break; - - case punctuation_cluster: - case non_myanmar_cluster: - break; - } -} - -static inline void -insert_dotted_circles (const hb_ot_shape_plan_t *plan HB_UNUSED, - hb_font_t *font, - hb_buffer_t *buffer) -{ - /* Note: This loop is extra overhead, but should not be measurable. */ - bool has_broken_syllables = false; - unsigned int count = buffer->len; - hb_glyph_info_t *info = buffer->info; - for (unsigned int i = 0; i < count; i++) - if ((info[i].syllable() & 0x0F) == broken_cluster) - { - has_broken_syllables = true; - break; - } - if (likely (!has_broken_syllables)) - return; - - - hb_codepoint_t dottedcircle_glyph; - if (!font->get_nominal_glyph (0x25CCu, &dottedcircle_glyph)) - return; - - hb_glyph_info_t dottedcircle = {0}; - dottedcircle.codepoint = 0x25CCu; - set_myanmar_properties (dottedcircle); - dottedcircle.codepoint = dottedcircle_glyph; - - buffer->clear_output (); - - buffer->idx = 0; - unsigned int last_syllable = 0; - while (buffer->idx < buffer->len && !buffer->in_error) - { - unsigned int syllable = buffer->cur().syllable(); - syllable_type_t syllable_type = (syllable_type_t) (syllable & 0x0F); - if (unlikely (last_syllable != syllable && syllable_type == broken_cluster)) - { - last_syllable = syllable; - - hb_glyph_info_t ginfo = dottedcircle; - ginfo.cluster = buffer->cur().cluster; - ginfo.mask = buffer->cur().mask; - ginfo.syllable() = buffer->cur().syllable(); - - buffer->output_info (ginfo); - } - else - buffer->next_glyph (); - } - - buffer->swap_buffers (); -} - -static void -initial_reordering (const hb_ot_shape_plan_t *plan, - hb_font_t *font, - hb_buffer_t *buffer) -{ - insert_dotted_circles (plan, font, buffer); - - foreach_syllable (buffer, start, end) - initial_reordering_syllable (plan, font->face, buffer, start, end); -} - -static void -final_reordering (const hb_ot_shape_plan_t *plan, - hb_font_t *font HB_UNUSED, - hb_buffer_t *buffer) -{ - hb_glyph_info_t *info = buffer->info; - unsigned int count = buffer->len; - - /* Zero syllables now... */ - for (unsigned int i = 0; i < count; i++) - info[i].syllable() = 0; - - HB_BUFFER_DEALLOCATE_VAR (buffer, myanmar_category); - HB_BUFFER_DEALLOCATE_VAR (buffer, myanmar_position); -} - - -/* Uniscribe seems to have a shaper for 'mymr' that is like the - * generic shaper, except that it zeros mark advances GDEF_LATE. */ -const hb_ot_complex_shaper_t _hb_ot_complex_shaper_myanmar_old = -{ - nullptr, /* collect_features */ - nullptr, /* override_features */ - nullptr, /* data_create */ - nullptr, /* data_destroy */ - nullptr, /* preprocess_text */ - nullptr, /* postprocess_glyphs */ - HB_OT_SHAPE_NORMALIZATION_MODE_DEFAULT, - nullptr, /* decompose */ - nullptr, /* compose */ - nullptr, /* setup_masks */ - nullptr, /* disable_otl */ - nullptr, /* reorder_marks */ - HB_OT_SHAPE_ZERO_WIDTH_MARKS_BY_GDEF_LATE, - true, /* fallback_position */ -}; - -const hb_ot_complex_shaper_t _hb_ot_complex_shaper_myanmar = -{ - collect_features_myanmar, - override_features_myanmar, - nullptr, /* data_create */ - nullptr, /* data_destroy */ - nullptr, /* preprocess_text */ - nullptr, /* postprocess_glyphs */ - HB_OT_SHAPE_NORMALIZATION_MODE_COMPOSED_DIACRITICS_NO_SHORT_CIRCUIT, - nullptr, /* decompose */ - nullptr, /* compose */ - setup_masks_myanmar, - nullptr, /* disable_otl */ - nullptr, /* reorder_marks */ - HB_OT_SHAPE_ZERO_WIDTH_MARKS_BY_GDEF_EARLY, - false, /* fallback_position */ -}; |