diff options
Diffstat (limited to 'src/3rdparty/harfbuzz-ng/src/hb-ot-shape-complex-use.cc')
-rw-r--r-- | src/3rdparty/harfbuzz-ng/src/hb-ot-shape-complex-use.cc | 612 |
1 files changed, 0 insertions, 612 deletions
diff --git a/src/3rdparty/harfbuzz-ng/src/hb-ot-shape-complex-use.cc b/src/3rdparty/harfbuzz-ng/src/hb-ot-shape-complex-use.cc deleted file mode 100644 index 62acd697bd..0000000000 --- a/src/3rdparty/harfbuzz-ng/src/hb-ot-shape-complex-use.cc +++ /dev/null @@ -1,612 +0,0 @@ -/* - * Copyright © 2015 Mozilla Foundation. - * Copyright © 2015 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. - * - * Mozilla Author(s): Jonathan Kew - * Google Author(s): Behdad Esfahbod - */ - -#include "hb-ot-shape-complex-use-private.hh" -#include "hb-ot-shape-complex-arabic-private.hh" - -/* buffer var allocations */ -#define use_category() complex_var_u8_0() - - -/* - * Universal Shaping Engine. - * https://www.microsoft.com/typography/OpenTypeDev/USE/intro.htm - */ - -static const hb_tag_t -basic_features[] = -{ - /* - * Basic features. - * These features are applied all at once, before reordering. - */ - HB_TAG('r','k','r','f'), - HB_TAG('a','b','v','f'), - HB_TAG('b','l','w','f'), - HB_TAG('h','a','l','f'), - HB_TAG('p','s','t','f'), - HB_TAG('v','a','t','u'), - HB_TAG('c','j','c','t'), -}; -static const hb_tag_t -arabic_features[] = -{ - HB_TAG('i','s','o','l'), - HB_TAG('i','n','i','t'), - HB_TAG('m','e','d','i'), - HB_TAG('f','i','n','a'), - /* The spec doesn't specify these but we apply anyway, since our Arabic shaper - * does. These are only used in Syriac spec. */ - HB_TAG('m','e','d','2'), - HB_TAG('f','i','n','2'), - HB_TAG('f','i','n','3'), -}; -/* Same order as arabic_features. Don't need Syriac stuff.*/ -enum joining_form_t { - ISOL, - INIT, - MEDI, - FINA, - _NONE -}; -static const hb_tag_t -other_features[] = -{ - /* - * Other features. - * These features are applied all at once, after reordering. - */ - HB_TAG('a','b','v','s'), - HB_TAG('b','l','w','s'), - HB_TAG('h','a','l','n'), - HB_TAG('p','r','e','s'), - HB_TAG('p','s','t','s'), - /* Positioning features, though we don't care about the types. */ - HB_TAG('d','i','s','t'), - 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 -clear_substitution_flags (const hb_ot_shape_plan_t *plan, - hb_font_t *font, - hb_buffer_t *buffer); -static void -record_rphf (const hb_ot_shape_plan_t *plan, - hb_font_t *font, - hb_buffer_t *buffer); -static void -record_pref (const hb_ot_shape_plan_t *plan, - hb_font_t *font, - hb_buffer_t *buffer); -static void -reorder (const hb_ot_shape_plan_t *plan, - hb_font_t *font, - hb_buffer_t *buffer); - -static void -collect_features_use (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); - - /* "Default glyph pre-processing group" */ - map->add_global_bool_feature (HB_TAG('l','o','c','l')); - map->add_global_bool_feature (HB_TAG('c','c','m','p')); - map->add_global_bool_feature (HB_TAG('n','u','k','t')); - map->add_global_bool_feature (HB_TAG('a','k','h','n')); - - /* "Reordering group" */ - map->add_gsub_pause (clear_substitution_flags); - map->add_feature (HB_TAG('r','p','h','f'), 1, F_MANUAL_ZWJ); - map->add_gsub_pause (record_rphf); - map->add_gsub_pause (clear_substitution_flags); - map->add_feature (HB_TAG('p','r','e','f'), 1, F_GLOBAL | F_MANUAL_ZWJ); - map->add_gsub_pause (record_pref); - - /* "Orthographic unit shaping group" */ - 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 (reorder); - - /* "Topographical features" */ - for (unsigned int i = 0; i < ARRAY_LENGTH (arabic_features); i++) - map->add_feature (arabic_features[i], 1, F_NONE); - map->add_gsub_pause (nullptr); - - /* "Standard typographic presentation" and "Positional feature application" */ - for (unsigned int i = 0; i < ARRAY_LENGTH (other_features); i++) - map->add_feature (other_features[i], 1, F_GLOBAL | F_MANUAL_ZWJ); -} - -struct use_shape_plan_t -{ - ASSERT_POD (); - - hb_mask_t rphf_mask; - - arabic_shape_plan_t *arabic_plan; -}; - -static bool -has_arabic_joining (hb_script_t script) -{ - /* List of scripts that have data in arabic-table. */ - switch ((int) script) - { - /* Unicode-1.1 additions */ - case HB_SCRIPT_ARABIC: - - /* Unicode-3.0 additions */ - case HB_SCRIPT_MONGOLIAN: - case HB_SCRIPT_SYRIAC: - - /* Unicode-5.0 additions */ - case HB_SCRIPT_NKO: - case HB_SCRIPT_PHAGS_PA: - - /* Unicode-6.0 additions */ - case HB_SCRIPT_MANDAIC: - - /* Unicode-7.0 additions */ - case HB_SCRIPT_MANICHAEAN: - case HB_SCRIPT_PSALTER_PAHLAVI: - - /* Unicode-9.0 additions */ - case HB_SCRIPT_ADLAM: - - return true; - - default: - return false; - } -} - -static void * -data_create_use (const hb_ot_shape_plan_t *plan) -{ - use_shape_plan_t *use_plan = (use_shape_plan_t *) calloc (1, sizeof (use_shape_plan_t)); - if (unlikely (!use_plan)) - return nullptr; - - use_plan->rphf_mask = plan->map.get_1_mask (HB_TAG('r','p','h','f')); - - if (has_arabic_joining (plan->props.script)) - { - use_plan->arabic_plan = (arabic_shape_plan_t *) data_create_arabic (plan); - if (unlikely (!use_plan->arabic_plan)) - { - free (use_plan); - return nullptr; - } - } - - return use_plan; -} - -static void -data_destroy_use (void *data) -{ - use_shape_plan_t *use_plan = (use_shape_plan_t *) data; - - if (use_plan->arabic_plan) - data_destroy_arabic (use_plan->arabic_plan); - - free (data); -} - -enum syllable_type_t { - independent_cluster, - virama_terminated_cluster, - standard_cluster, - number_joiner_terminated_cluster, - numeral_cluster, - symbol_cluster, - broken_cluster, - non_cluster, -}; - -#include "hb-ot-shape-complex-use-machine.hh" - - -static void -setup_masks_use (const hb_ot_shape_plan_t *plan, - hb_buffer_t *buffer, - hb_font_t *font HB_UNUSED) -{ - const use_shape_plan_t *use_plan = (const use_shape_plan_t *) plan->data; - - /* Do this before allocating use_category(). */ - if (use_plan->arabic_plan) - { - setup_masks_arabic_plan (use_plan->arabic_plan, buffer, plan->props.script); - } - - HB_BUFFER_ALLOCATE_VAR (buffer, use_category); - - /* 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++) - info[i].use_category() = hb_use_get_categories (info[i].codepoint); -} - -static void -setup_rphf_mask (const hb_ot_shape_plan_t *plan, - hb_buffer_t *buffer) -{ - const use_shape_plan_t *use_plan = (const use_shape_plan_t *) plan->data; - - hb_mask_t mask = use_plan->rphf_mask; - if (!mask) return; - - hb_glyph_info_t *info = buffer->info; - - foreach_syllable (buffer, start, end) - { - unsigned int limit = info[start].use_category() == USE_R ? 1 : MIN (3u, end - start); - for (unsigned int i = start; i < start + limit; i++) - info[i].mask |= mask; - } -} - -static void -setup_topographical_masks (const hb_ot_shape_plan_t *plan, - hb_buffer_t *buffer) -{ - const use_shape_plan_t *use_plan = (const use_shape_plan_t *) plan->data; - if (use_plan->arabic_plan) - return; - - static_assert ((INIT < 4 && ISOL < 4 && MEDI < 4 && FINA < 4), ""); - hb_mask_t masks[4], all_masks = 0; - for (unsigned int i = 0; i < 4; i++) - { - masks[i] = plan->map.get_1_mask (arabic_features[i]); - if (masks[i] == plan->map.get_global_mask ()) - masks[i] = 0; - all_masks |= masks[i]; - } - if (!all_masks) - return; - hb_mask_t other_masks = ~all_masks; - - unsigned int last_start = 0; - joining_form_t last_form = _NONE; - hb_glyph_info_t *info = buffer->info; - foreach_syllable (buffer, start, end) - { - syllable_type_t syllable_type = (syllable_type_t) (info[start].syllable() & 0x0F); - switch (syllable_type) - { - case independent_cluster: - case symbol_cluster: - case non_cluster: - /* These don't join. Nothing to do. */ - last_form = _NONE; - break; - - case virama_terminated_cluster: - case standard_cluster: - case number_joiner_terminated_cluster: - case numeral_cluster: - case broken_cluster: - - bool join = last_form == FINA || last_form == ISOL; - - if (join) - { - /* Fixup previous syllable's form. */ - last_form = last_form == FINA ? MEDI : INIT; - for (unsigned int i = last_start; i < start; i++) - info[i].mask = (info[i].mask & other_masks) | masks[last_form]; - } - - /* Form for this syllable. */ - last_form = join ? FINA : ISOL; - for (unsigned int i = start; i < end; i++) - info[i].mask = (info[i].mask & other_masks) | masks[last_form]; - - break; - } - - last_start = start; - } -} - -static void -setup_syllables (const hb_ot_shape_plan_t *plan, - hb_font_t *font HB_UNUSED, - hb_buffer_t *buffer) -{ - find_syllables (buffer); - foreach_syllable (buffer, start, end) - buffer->unsafe_to_break (start, end); - setup_rphf_mask (plan, buffer); - setup_topographical_masks (plan, buffer); -} - -static void -clear_substitution_flags (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; - for (unsigned int i = 0; i < count; i++) - _hb_glyph_info_clear_substituted (&info[i]); -} - -static void -record_rphf (const hb_ot_shape_plan_t *plan, - hb_font_t *font, - hb_buffer_t *buffer) -{ - const use_shape_plan_t *use_plan = (const use_shape_plan_t *) plan->data; - - hb_mask_t mask = use_plan->rphf_mask; - if (!mask) return; - hb_glyph_info_t *info = buffer->info; - - foreach_syllable (buffer, start, end) - { - /* Mark a substituted repha as USE_R. */ - for (unsigned int i = start; i < end && (info[i].mask & mask); i++) - if (_hb_glyph_info_substituted (&info[i])) - { - info[i].use_category() = USE_R; - break; - } - } -} - -static void -record_pref (const hb_ot_shape_plan_t *plan, - hb_font_t *font, - hb_buffer_t *buffer) -{ - hb_glyph_info_t *info = buffer->info; - - foreach_syllable (buffer, start, end) - { - /* Mark a substituted pref as VPre, as they behave the same way. */ - for (unsigned int i = start; i < end; i++) - if (_hb_glyph_info_substituted (&info[i])) - { - info[i].use_category() = USE_VPre; - break; - } - } -} - -static inline bool -is_halant (const hb_glyph_info_t &info) -{ - return info.use_category() == USE_H && !_hb_glyph_info_ligated (&info); -} - -static void -reorder_syllable (hb_buffer_t *buffer, unsigned int start, unsigned int end) -{ - syllable_type_t syllable_type = (syllable_type_t) (buffer->info[start].syllable() & 0x0F); - /* Only a few syllable types need reordering. */ - if (unlikely (!(FLAG_UNSAFE (syllable_type) & - (FLAG (virama_terminated_cluster) | - FLAG (standard_cluster) | - FLAG (broken_cluster) | - 0)))) - return; - - hb_glyph_info_t *info = buffer->info; - -#define BASE_FLAGS (FLAG (USE_B) | FLAG (USE_GB)) - - /* Move things forward. */ - if (info[start].use_category() == USE_R && end - start > 1) - { - /* Got a repha. Reorder it to after first base, before first halant. */ - for (unsigned int i = start + 1; i < end; i++) - if ((FLAG_UNSAFE (info[i].use_category()) & (BASE_FLAGS)) || is_halant (info[i])) - { - /* If we hit a halant, move before it; otherwise it's a base: move to it's - * place, and shift things in between backward. */ - - if (is_halant (info[i])) - i--; - - buffer->merge_clusters (start, i + 1); - hb_glyph_info_t t = info[start]; - memmove (&info[start], &info[start + 1], (i - start) * sizeof (info[0])); - info[i] = t; - - break; - } - } - - /* Move things back. */ - unsigned int j = end; - for (unsigned int i = start; i < end; i++) - { - uint32_t flag = FLAG_UNSAFE (info[i].use_category()); - if ((flag & (BASE_FLAGS)) || is_halant (info[i])) - { - /* If we hit a halant, move after it; otherwise it's a base: move to it's - * place, and shift things in between backward. */ - if (is_halant (info[i])) - j = i + 1; - else - j = i; - } - else if (((flag) & (FLAG (USE_VPre) | FLAG (USE_VMPre))) && - /* Only move the first component of a MultipleSubst. */ - 0 == _hb_glyph_info_get_lig_comp (&info[i]) && - j < i) - { - buffer->merge_clusters (j, i + 1); - hb_glyph_info_t t = info[i]; - memmove (&info[j + 1], &info[j], (i - j) * sizeof (info[0])); - info[j] = t; - } - } -} - -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_glyph_info_t dottedcircle = {0}; - if (!font->get_nominal_glyph (0x25CCu, &dottedcircle.codepoint)) - return; - dottedcircle.use_category() = hb_use_get_categories (0x25CC); - - 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(); - /* TODO Set glyph_props? */ - - /* Insert dottedcircle after possible Repha. */ - while (buffer->idx < buffer->len && !buffer->in_error && - last_syllable == buffer->cur().syllable() && - buffer->cur().use_category() == USE_R) - buffer->next_glyph (); - - buffer->output_info (ginfo); - } - else - buffer->next_glyph (); - } - - buffer->swap_buffers (); -} - -static void -reorder (const hb_ot_shape_plan_t *plan, - hb_font_t *font, - hb_buffer_t *buffer) -{ - insert_dotted_circles (plan, font, buffer); - - hb_glyph_info_t *info = buffer->info; - - foreach_syllable (buffer, start, end) - reorder_syllable (buffer, start, end); - - /* Zero syllables now... */ - unsigned int count = buffer->len; - for (unsigned int i = 0; i < count; i++) - info[i].syllable() = 0; - - HB_BUFFER_DEALLOCATE_VAR (buffer, use_category); -} - -static bool -decompose_use (const hb_ot_shape_normalize_context_t *c, - hb_codepoint_t ab, - hb_codepoint_t *a, - hb_codepoint_t *b) -{ - switch (ab) - { - /* Chakma: - * Special case where the Unicode decomp gives matras in the wrong order - * for cluster validation. - */ - case 0x1112Eu : *a = 0x11127u; *b= 0x11131u; return true; - case 0x1112Fu : *a = 0x11127u; *b= 0x11132u; return true; - } - - return (bool) c->unicode->decompose (ab, a, b); -} - -static bool -compose_use (const hb_ot_shape_normalize_context_t *c, - hb_codepoint_t a, - hb_codepoint_t b, - hb_codepoint_t *ab) -{ - /* Avoid recomposing split matras. */ - if (HB_UNICODE_GENERAL_CATEGORY_IS_MARK (c->unicode->general_category (a))) - return false; - - return (bool)c->unicode->compose (a, b, ab); -} - - -const hb_ot_complex_shaper_t _hb_ot_complex_shaper_use = -{ - collect_features_use, - nullptr, /* override_features */ - data_create_use, - data_destroy_use, - nullptr, /* preprocess_text */ - nullptr, /* postprocess_glyphs */ - HB_OT_SHAPE_NORMALIZATION_MODE_COMPOSED_DIACRITICS_NO_SHORT_CIRCUIT, - decompose_use, - compose_use, - setup_masks_use, - nullptr, /* disable_otl */ - nullptr, /* reorder_marks */ - HB_OT_SHAPE_ZERO_WIDTH_MARKS_BY_GDEF_EARLY, - false, /* fallback_position */ -}; |