--- /dev/null 2015-11-17 15:40:13.000000000 -0800 +++ new/src/java.desktop/share/native/libfontmanager/harfbuzz/hb-ot-shape-complex-myanmar.cc 2015-11-17 15:40:13.000000000 -0800 @@ -0,0 +1,561 @@ +/* + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. Oracle designates this + * particular file as subject to the "Classpath" exception as provided + * by Oracle in the LICENSE file that accompanied this code. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ + +// This file is available under and governed by the GNU General Public +// License version 2 only, as published by the Free Software Foundation. +// However, the following notice accompanied the original version of this +// file: +// +/* + * 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 (NULL); + } + 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_D = 19, /* Digits except zero */ + 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 */ +}; + + +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_SAFE (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 (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 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; + } + + 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); +} + +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_glyph (0x25CCu, 0, &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) + { + 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 info = dottedcircle; + info.cluster = buffer->cur().cluster; + info.mask = buffer->cur().mask; + info.syllable() = buffer->cur().syllable(); + + buffer->output_info (info); + } + 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 = +{ + "default", + NULL, /* collect_features */ + NULL, /* override_features */ + NULL, /* data_create */ + NULL, /* data_destroy */ + NULL, /* preprocess_text */ + HB_OT_SHAPE_NORMALIZATION_MODE_DEFAULT, + NULL, /* decompose */ + NULL, /* compose */ + NULL, /* setup_masks */ + HB_OT_SHAPE_ZERO_WIDTH_MARKS_BY_GDEF_LATE, + true, /* fallback_position */ +}; + +const hb_ot_complex_shaper_t _hb_ot_complex_shaper_myanmar = +{ + "myanmar", + collect_features_myanmar, + override_features_myanmar, + NULL, /* data_create */ + NULL, /* data_destroy */ + NULL, /* preprocess_text */ + HB_OT_SHAPE_NORMALIZATION_MODE_COMPOSED_DIACRITICS_NO_SHORT_CIRCUIT, + NULL, /* decompose */ + NULL, /* compose */ + setup_masks_myanmar, + HB_OT_SHAPE_ZERO_WIDTH_MARKS_BY_GDEF_EARLY, + false, /* fallback_position */ +};