diff options
author | Peter Breitenlohner <peb@mppmu.mpg.de> | 2014-08-14 06:32:54 +0000 |
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committer | Peter Breitenlohner <peb@mppmu.mpg.de> | 2014-08-14 06:32:54 +0000 |
commit | 49ae64711459f3102127663d319523bb1782835e (patch) | |
tree | ecae1a28cf5df3a9294eee6249c75fdc51483fce /Build/source/libs/harfbuzz/harfbuzz-0.9.34/src/hb-ot-shape-complex-arabic.cc | |
parent | 7b4d9b0a16a8b3c372247e1c2107e8942c192e55 (diff) |
harfbuzz 0.9.35
git-svn-id: svn://tug.org/texlive/trunk@34929 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Build/source/libs/harfbuzz/harfbuzz-0.9.34/src/hb-ot-shape-complex-arabic.cc')
-rw-r--r-- | Build/source/libs/harfbuzz/harfbuzz-0.9.34/src/hb-ot-shape-complex-arabic.cc | 382 |
1 files changed, 0 insertions, 382 deletions
diff --git a/Build/source/libs/harfbuzz/harfbuzz-0.9.34/src/hb-ot-shape-complex-arabic.cc b/Build/source/libs/harfbuzz/harfbuzz-0.9.34/src/hb-ot-shape-complex-arabic.cc deleted file mode 100644 index 6cf1a7f5907..00000000000 --- a/Build/source/libs/harfbuzz/harfbuzz-0.9.34/src/hb-ot-shape-complex-arabic.cc +++ /dev/null @@ -1,382 +0,0 @@ -/* - * Copyright © 2010,2012 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-private.hh" -#include "hb-ot-shape-private.hh" - - -/* buffer var allocations */ -#define arabic_shaping_action() complex_var_u8_0() /* arabic shaping action */ - - -/* - * Bits used in the joining tables - */ -enum { - JOINING_TYPE_U = 0, - JOINING_TYPE_L = 1, - JOINING_TYPE_R = 2, - JOINING_TYPE_D = 3, - JOINING_TYPE_C = JOINING_TYPE_D, - JOINING_GROUP_ALAPH = 4, - JOINING_GROUP_DALATH_RISH = 5, - NUM_STATE_MACHINE_COLS = 6, - - JOINING_TYPE_T = 7, - JOINING_TYPE_X = 8 /* means: use general-category to choose between U or T. */ -}; - -/* - * Joining types: - */ - -#include "hb-ot-shape-complex-arabic-table.hh" - -static unsigned int get_joining_type (hb_codepoint_t u, hb_unicode_general_category_t gen_cat) -{ - unsigned int j_type = joining_type(u); - if (likely (j_type != JOINING_TYPE_X)) - return j_type; - - return (FLAG(gen_cat) & - (FLAG(HB_UNICODE_GENERAL_CATEGORY_NON_SPACING_MARK) | - FLAG(HB_UNICODE_GENERAL_CATEGORY_ENCLOSING_MARK) | - FLAG(HB_UNICODE_GENERAL_CATEGORY_FORMAT)) - ) ? JOINING_TYPE_T : JOINING_TYPE_U; -} - -#define FEATURE_IS_SYRIAC(tag) hb_in_range<unsigned char> ((unsigned char) (tag), '2', '3') - -static const hb_tag_t arabic_features[] = -{ - HB_TAG('i','s','o','l'), - HB_TAG('f','i','n','a'), - HB_TAG('f','i','n','2'), - HB_TAG('f','i','n','3'), - HB_TAG('m','e','d','i'), - HB_TAG('m','e','d','2'), - HB_TAG('i','n','i','t'), - HB_TAG_NONE -}; - - -/* Same order as the feature array */ -enum { - ISOL, - FINA, - FIN2, - FIN3, - MEDI, - MED2, - INIT, - - NONE, - - ARABIC_NUM_FEATURES = NONE -}; - -static const struct arabic_state_table_entry { - uint8_t prev_action; - uint8_t curr_action; - uint16_t next_state; -} arabic_state_table[][NUM_STATE_MACHINE_COLS] = -{ - /* jt_U, jt_L, jt_R, jt_D, jg_ALAPH, jg_DALATH_RISH */ - - /* State 0: prev was U, not willing to join. */ - { {NONE,NONE,0}, {NONE,ISOL,2}, {NONE,ISOL,1}, {NONE,ISOL,2}, {NONE,ISOL,1}, {NONE,ISOL,6}, }, - - /* State 1: prev was R or ISOL/ALAPH, not willing to join. */ - { {NONE,NONE,0}, {NONE,ISOL,2}, {NONE,ISOL,1}, {NONE,ISOL,2}, {NONE,FIN2,5}, {NONE,ISOL,6}, }, - - /* State 2: prev was D/L in ISOL form, willing to join. */ - { {NONE,NONE,0}, {NONE,ISOL,2}, {INIT,FINA,1}, {INIT,FINA,3}, {INIT,FINA,4}, {INIT,FINA,6}, }, - - /* State 3: prev was D in FINA form, willing to join. */ - { {NONE,NONE,0}, {NONE,ISOL,2}, {MEDI,FINA,1}, {MEDI,FINA,3}, {MEDI,FINA,4}, {MEDI,FINA,6}, }, - - /* State 4: prev was FINA ALAPH, not willing to join. */ - { {NONE,NONE,0}, {NONE,ISOL,2}, {MED2,ISOL,1}, {MED2,ISOL,2}, {MED2,FIN2,5}, {MED2,ISOL,6}, }, - - /* State 5: prev was FIN2/FIN3 ALAPH, not willing to join. */ - { {NONE,NONE,0}, {NONE,ISOL,2}, {ISOL,ISOL,1}, {ISOL,ISOL,2}, {ISOL,FIN2,5}, {ISOL,ISOL,6}, }, - - /* State 6: prev was DALATH/RISH, not willing to join. */ - { {NONE,NONE,0}, {NONE,ISOL,2}, {NONE,ISOL,1}, {NONE,ISOL,2}, {NONE,FIN3,5}, {NONE,ISOL,6}, } -}; - - -static void -nuke_joiners (const hb_ot_shape_plan_t *plan, - hb_font_t *font, - hb_buffer_t *buffer); - -static void -arabic_fallback_shape (const hb_ot_shape_plan_t *plan, - hb_font_t *font, - hb_buffer_t *buffer); - -static void -collect_features_arabic (hb_ot_shape_planner_t *plan) -{ - hb_ot_map_builder_t *map = &plan->map; - - /* We apply features according to the Arabic spec, with pauses - * in between most. - * - * The pause between init/medi/... and rlig is required. See eg: - * https://bugzilla.mozilla.org/show_bug.cgi?id=644184 - * - * The pauses between init/medi/... themselves are not necessarily - * needed as only one of those features is applied to any character. - * The only difference it makes is when fonts have contextual - * substitutions. We now follow the order of the spec, which makes - * for better experience if that's what Uniscribe is doing. - * - * At least for Arabic, looks like Uniscribe has a pause between - * rlig and calt. Otherwise the IranNastaliq's ALLAH ligature won't - * work. However, testing shows that rlig and calt are applied - * together for Mongolian in Uniscribe. As such, we only add a - * pause for Arabic, not other scripts. - */ - - map->add_gsub_pause (nuke_joiners); - - map->add_global_bool_feature (HB_TAG('c','c','m','p')); - map->add_global_bool_feature (HB_TAG('l','o','c','l')); - - map->add_gsub_pause (NULL); - - for (unsigned int i = 0; i < ARABIC_NUM_FEATURES; i++) - { - bool has_fallback = plan->props.script == HB_SCRIPT_ARABIC && !FEATURE_IS_SYRIAC (arabic_features[i]); - map->add_feature (arabic_features[i], 1, has_fallback ? F_HAS_FALLBACK : F_NONE); - map->add_gsub_pause (NULL); - } - - map->add_feature (HB_TAG('r','l','i','g'), 1, F_GLOBAL|F_HAS_FALLBACK); - if (plan->props.script == HB_SCRIPT_ARABIC) - map->add_gsub_pause (arabic_fallback_shape); - - map->add_global_bool_feature (HB_TAG('c','a','l','t')); - map->add_gsub_pause (NULL); - - /* The spec includes 'cswh'. Earlier versions of Windows - * used to enable this by default, but testing suggests - * that Windows 8 and later do not enable it by default, - * and spec now says 'Off by default'. - * We disabled this in ae23c24c32. - * Note that IranNastaliq uses this feature extensively - * to fixup broken glyph sequences. Oh well... - * Test case: U+0643,U+0640,U+0631. */ - //map->add_global_bool_feature (HB_TAG('c','s','w','h')); - map->add_global_bool_feature (HB_TAG('m','s','e','t')); -} - -#include "hb-ot-shape-complex-arabic-fallback.hh" - -struct arabic_shape_plan_t -{ - ASSERT_POD (); - - /* The "+ 1" in the next array is to accommodate for the "NONE" command, - * which is not an OpenType feature, but this simplifies the code by not - * having to do a "if (... < NONE) ..." and just rely on the fact that - * mask_array[NONE] == 0. */ - hb_mask_t mask_array[ARABIC_NUM_FEATURES + 1]; - - bool do_fallback; - arabic_fallback_plan_t *fallback_plan; -}; - -static void * -data_create_arabic (const hb_ot_shape_plan_t *plan) -{ - arabic_shape_plan_t *arabic_plan = (arabic_shape_plan_t *) calloc (1, sizeof (arabic_shape_plan_t)); - if (unlikely (!arabic_plan)) - return NULL; - - arabic_plan->do_fallback = plan->props.script == HB_SCRIPT_ARABIC; - for (unsigned int i = 0; i < ARABIC_NUM_FEATURES; i++) { - arabic_plan->mask_array[i] = plan->map.get_1_mask (arabic_features[i]); - arabic_plan->do_fallback = arabic_plan->do_fallback && - !FEATURE_IS_SYRIAC (arabic_features[i]) && - plan->map.needs_fallback (arabic_features[i]); - } - - return arabic_plan; -} - -static void -data_destroy_arabic (void *data) -{ - arabic_shape_plan_t *arabic_plan = (arabic_shape_plan_t *) data; - - arabic_fallback_plan_destroy (arabic_plan->fallback_plan); - - free (data); -} - -static void -arabic_joining (hb_buffer_t *buffer) -{ - unsigned int count = buffer->len; - hb_glyph_info_t *info = buffer->info; - unsigned int prev = (unsigned int) -1, state = 0; - - /* Check pre-context */ - for (unsigned int i = 0; i < buffer->context_len[0]; i++) - { - unsigned int this_type = get_joining_type (buffer->context[0][i], buffer->unicode->general_category (buffer->context[0][i])); - - if (unlikely (this_type == JOINING_TYPE_T)) - continue; - - const arabic_state_table_entry *entry = &arabic_state_table[state][this_type]; - state = entry->next_state; - break; - } - - for (unsigned int i = 0; i < count; i++) - { - unsigned int this_type = get_joining_type (info[i].codepoint, _hb_glyph_info_get_general_category (&info[i])); - - if (unlikely (this_type == JOINING_TYPE_T)) { - info[i].arabic_shaping_action() = NONE; - continue; - } - - const arabic_state_table_entry *entry = &arabic_state_table[state][this_type]; - - if (entry->prev_action != NONE && prev != (unsigned int) -1) - info[prev].arabic_shaping_action() = entry->prev_action; - - info[i].arabic_shaping_action() = entry->curr_action; - - prev = i; - state = entry->next_state; - } - - for (unsigned int i = 0; i < buffer->context_len[1]; i++) - { - unsigned int this_type = get_joining_type (buffer->context[1][i], buffer->unicode->general_category (buffer->context[1][i])); - - if (unlikely (this_type == JOINING_TYPE_T)) - continue; - - const arabic_state_table_entry *entry = &arabic_state_table[state][this_type]; - if (entry->prev_action != NONE && prev != (unsigned int) -1) - info[prev].arabic_shaping_action() = entry->prev_action; - break; - } -} - -static void -mongolian_variation_selectors (hb_buffer_t *buffer) -{ - /* Copy arabic_shaping_action() from base to Mongolian variation selectors. */ - unsigned int count = buffer->len; - hb_glyph_info_t *info = buffer->info; - for (unsigned int i = 1; i < count; i++) - if (unlikely (hb_in_range (info[i].codepoint, 0x180Bu, 0x180Du))) - info[i].arabic_shaping_action() = info[i - 1].arabic_shaping_action(); -} - -static void -setup_masks_arabic (const hb_ot_shape_plan_t *plan, - hb_buffer_t *buffer, - hb_font_t *font HB_UNUSED) -{ - HB_BUFFER_ALLOCATE_VAR (buffer, arabic_shaping_action); - - const arabic_shape_plan_t *arabic_plan = (const arabic_shape_plan_t *) plan->data; - - arabic_joining (buffer); - if (plan->props.script == HB_SCRIPT_MONGOLIAN) - mongolian_variation_selectors (buffer); - - unsigned int count = buffer->len; - hb_glyph_info_t *info = buffer->info; - for (unsigned int i = 0; i < count; i++) - info[i].mask |= arabic_plan->mask_array[info[i].arabic_shaping_action()]; - - HB_BUFFER_DEALLOCATE_VAR (buffer, arabic_shaping_action); -} - - -static void -nuke_joiners (const hb_ot_shape_plan_t *plan HB_UNUSED, - hb_font_t *font HB_UNUSED, - hb_buffer_t *buffer) -{ - unsigned int count = buffer->len; - hb_glyph_info_t *info = buffer->info; - for (unsigned int i = 0; i < count; i++) - if (_hb_glyph_info_is_zwj (&info[i])) - _hb_glyph_info_flip_joiners (&info[i]); -} - -static void -arabic_fallback_shape (const hb_ot_shape_plan_t *plan, - hb_font_t *font, - hb_buffer_t *buffer) -{ - const arabic_shape_plan_t *arabic_plan = (const arabic_shape_plan_t *) plan->data; - - if (!arabic_plan->do_fallback) - return; - -retry: - arabic_fallback_plan_t *fallback_plan = (arabic_fallback_plan_t *) hb_atomic_ptr_get (&arabic_plan->fallback_plan); - if (unlikely (!fallback_plan)) - { - /* This sucks. We need a font to build the fallback plan... */ - fallback_plan = arabic_fallback_plan_create (plan, font); - if (unlikely (!hb_atomic_ptr_cmpexch (&(const_cast<arabic_shape_plan_t *> (arabic_plan))->fallback_plan, NULL, fallback_plan))) { - arabic_fallback_plan_destroy (fallback_plan); - goto retry; - } - } - - arabic_fallback_plan_shape (fallback_plan, font, buffer); -} - - -const hb_ot_complex_shaper_t _hb_ot_complex_shaper_arabic = -{ - "arabic", - collect_features_arabic, - NULL, /* override_features */ - data_create_arabic, - data_destroy_arabic, - NULL, /* preprocess_text_arabic */ - HB_OT_SHAPE_NORMALIZATION_MODE_DEFAULT, - NULL, /* decompose */ - NULL, /* compose */ - setup_masks_arabic, - HB_OT_SHAPE_ZERO_WIDTH_MARKS_BY_GDEF_LATE, - true, /* fallback_position */ -}; |