summaryrefslogtreecommitdiff
path: root/Build/source/libs/harfbuzz/harfbuzz-0.9.34/src/hb-ot-shape-complex-arabic.cc
diff options
context:
space:
mode:
authorPeter Breitenlohner <peb@mppmu.mpg.de>2014-08-14 06:32:54 +0000
committerPeter Breitenlohner <peb@mppmu.mpg.de>2014-08-14 06:32:54 +0000
commit49ae64711459f3102127663d319523bb1782835e (patch)
treeecae1a28cf5df3a9294eee6249c75fdc51483fce /Build/source/libs/harfbuzz/harfbuzz-0.9.34/src/hb-ot-shape-complex-arabic.cc
parent7b4d9b0a16a8b3c372247e1c2107e8942c192e55 (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.cc382
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 */
-};