diff options
Diffstat (limited to 'Build/source/libs/harfbuzz/harfbuzz-0.9.13/src/hb-ot-shape-complex-arabic.cc')
-rw-r--r-- | Build/source/libs/harfbuzz/harfbuzz-0.9.13/src/hb-ot-shape-complex-arabic.cc | 357 |
1 files changed, 0 insertions, 357 deletions
diff --git a/Build/source/libs/harfbuzz/harfbuzz-0.9.13/src/hb-ot-shape-complex-arabic.cc b/Build/source/libs/harfbuzz/harfbuzz-0.9.13/src/hb-ot-shape-complex-arabic.cc deleted file mode 100644 index 18b3d02dc00..00000000000 --- a/Build/source/libs/harfbuzz/harfbuzz-0.9.13/src/hb-ot-shape-complex-arabic.cc +++ /dev/null @@ -1,357 +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) -{ - if (likely (hb_in_range<hb_codepoint_t> (u, JOINING_TABLE_FIRST, JOINING_TABLE_LAST))) { - unsigned int j_type = joining_table[u - JOINING_TABLE_FIRST]; - if (likely (j_type != JOINING_TYPE_X)) - return j_type; - } - - /* Mongolian joining data is not in ArabicJoining.txt yet. */ - if (unlikely (hb_in_range<hb_codepoint_t> (u, 0x1800, 0x18AF))) - { - if (unlikely (hb_in_range<hb_codepoint_t> (u, 0x1880, 0x1886))) - return JOINING_TYPE_U; - - /* All letters, SIBE SYLLABLE BOUNDARY MARKER, and NIRUGU are D */ - if ((FLAG(gen_cat) & (FLAG (HB_UNICODE_GENERAL_CATEGORY_OTHER_LETTER) | - FLAG (HB_UNICODE_GENERAL_CATEGORY_MODIFIER_LETTER))) - || u == 0x1807 || u == 0x180A) - return JOINING_TYPE_D; - } - - /* 'Phags-pa joining data is not in ArabicJoining.txt yet. */ - if (unlikely (hb_in_range<hb_codepoint_t> (u, 0xA840, 0xA872))) - { - if (unlikely (u == 0xA872)) - return JOINING_TYPE_L; - - return JOINING_TYPE_D; - } - - if (unlikely (hb_in_range<hb_codepoint_t> (u, 0x200C, 0x200D))) - { - return u == 0x200C ? JOINING_TYPE_U : JOINING_TYPE_C; - } - - 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; -} - -static const hb_tag_t arabic_features[] = -{ - HB_TAG('i','n','i','t'), - HB_TAG('m','e','d','i'), - HB_TAG('f','i','n','a'), - HB_TAG('i','s','o','l'), - /* Syriac */ - HB_TAG('m','e','d','2'), - HB_TAG('f','i','n','2'), - HB_TAG('f','i','n','3'), - HB_TAG_NONE -}; - - -/* Same order as the feature array */ -enum { - INIT, - MEDI, - FINA, - ISOL, - - /* Syriac */ - MED2, - FIN2, - FIN3, - - 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 -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; - - /* For Language forms (in ArabicOT speak), we do the iso/fina/medi/init together, - * then rlig and calt each in their own stage. This makes IranNastaliq's ALLAH - * ligature work correctly. It's unfortunate though... - * - * This also makes Arial Bold in Windows7 work. See: - * https://bugzilla.mozilla.org/show_bug.cgi?id=644184 - * - * TODO: Add test cases for these two. - */ - - 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++) - map->add_feature (arabic_features[i], 1, i < 4 ? F_HAS_FALLBACK : F_NONE); /* The first four features have fallback. */ - - map->add_gsub_pause (NULL); - - map->add_feature (HB_TAG('r','l','i','g'), 1, F_GLOBAL|F_HAS_FALLBACK); - map->add_gsub_pause (arabic_fallback_shape); - - map->add_global_bool_feature (HB_TAG('c','a','l','t')); - map->add_gsub_pause (NULL); - - map->add_global_bool_feature (HB_TAG('c','s','w','h')); - map->add_global_bool_feature (HB_TAG('d','l','i','g')); - 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]); - if (i < 4) - arabic_plan->do_fallback = arabic_plan->do_fallback && 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; - unsigned int prev = (unsigned int) -1, state = 0; - - HB_BUFFER_ALLOCATE_VAR (buffer, arabic_shaping_action); - - /* Check pre-context */ - if (!(buffer->flags & HB_BUFFER_FLAG_BOT)) - 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 (buffer->info[i].codepoint, _hb_glyph_info_get_general_category (&buffer->info[i])); - - if (unlikely (this_type == JOINING_TYPE_T)) { - buffer->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) - buffer->info[prev].arabic_shaping_action() = entry->prev_action; - - buffer->info[i].arabic_shaping_action() = entry->curr_action; - - prev = i; - state = entry->next_state; - } - - if (!(buffer->flags & HB_BUFFER_FLAG_EOT)) - 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) - buffer->info[prev].arabic_shaping_action() = entry->prev_action; - break; - } - - - HB_BUFFER_DEALLOCATE_VAR (buffer, 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) -{ - const arabic_shape_plan_t *arabic_plan = (const arabic_shape_plan_t *) plan->data; - - arabic_joining (buffer); - unsigned int count = buffer->len; - for (unsigned int i = 0; i < count; i++) - buffer->info[i].mask |= arabic_plan->mask_array[buffer->info[i].arabic_shaping_action()]; -} - - -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 */ - NULL, /* normalization_preference */ - NULL, /* decompose */ - NULL, /* compose */ - setup_masks_arabic, - HB_OT_SHAPE_ZERO_WIDTH_MARKS_BY_UNICODE, - true, /* fallback_position */ -}; |