142 lines
4.3 KiB
C++
142 lines
4.3 KiB
C++
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/*
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* Copyright © 2010 Google, Inc.
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*
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* This is part of HarfBuzz, a text shaping library.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and its documentation for any purpose, provided that the
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* above copyright notice and the following two paragraphs appear in
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* all copies of this software.
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*
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* Google Author(s): Behdad Esfahbod
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*/
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#include "hb-ot-shape-complex-private.hh"
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HB_BEGIN_DECLS
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/* buffer var allocations */
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#define indic_categories() var2.u32 /* indic shaping action */
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#define INDIC_TABLE_ELEMENT_TYPE uint8_t
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enum indic_syllabic_category_t {
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INDIC_SYLLABIC_CATEGORY_AVAGRAHA,
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INDIC_SYLLABIC_CATEGORY_BINDU,
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INDIC_SYLLABIC_CATEGORY_CONSONANT,
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INDIC_SYLLABIC_CATEGORY_CONSONANT_DEAD,
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INDIC_SYLLABIC_CATEGORY_CONSONANT_FINAL,
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INDIC_SYLLABIC_CATEGORY_CONSONANT_HEAD_LETTER,
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INDIC_SYLLABIC_CATEGORY_CONSONANT_MEDIAL,
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INDIC_SYLLABIC_CATEGORY_CONSONANT_PLACEHOLDER,
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INDIC_SYLLABIC_CATEGORY_CONSONANT_REPHA,
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INDIC_SYLLABIC_CATEGORY_CONSONANT_SUBJOINED,
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INDIC_SYLLABIC_CATEGORY_MODIFYING_LETTER,
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INDIC_SYLLABIC_CATEGORY_NUKTA,
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INDIC_SYLLABIC_CATEGORY_OTHER,
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INDIC_SYLLABIC_CATEGORY_REGISTER_SHIFTER,
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INDIC_SYLLABIC_CATEGORY_TONE_LETTER,
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INDIC_SYLLABIC_CATEGORY_TONE_MARK,
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INDIC_SYLLABIC_CATEGORY_VIRAMA,
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INDIC_SYLLABIC_CATEGORY_VISARGA,
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INDIC_SYLLABIC_CATEGORY_VOWEL,
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INDIC_SYLLABIC_CATEGORY_VOWEL_DEPENDENT,
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INDIC_SYLLABIC_CATEGORY_VOWEL_INDEPENDENT,
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};
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enum indic_matra_category_t {
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INDIC_MATRA_CATEGORY_BOTTOM,
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INDIC_MATRA_CATEGORY_BOTTOM_AND_RIGHT,
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INDIC_MATRA_CATEGORY_INVISIBLE,
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INDIC_MATRA_CATEGORY_LEFT,
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INDIC_MATRA_CATEGORY_LEFT_AND_RIGHT,
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INDIC_MATRA_CATEGORY_NOT_APPLICABLE,
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INDIC_MATRA_CATEGORY_OVERSTRUCK,
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INDIC_MATRA_CATEGORY_RIGHT,
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INDIC_MATRA_CATEGORY_TOP,
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INDIC_MATRA_CATEGORY_TOP_AND_BOTTOM,
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INDIC_MATRA_CATEGORY_TOP_AND_BOTTOM_AND_RIGHT,
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INDIC_MATRA_CATEGORY_TOP_AND_LEFT,
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INDIC_MATRA_CATEGORY_TOP_AND_LEFT_AND_RIGHT,
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INDIC_MATRA_CATEGORY_TOP_AND_RIGHT,
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INDIC_MATRA_CATEGORY_VISUAL_ORDER_LEFT,
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};
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#define INDIC_COMBINE_CATEGORIES(S,M) (S)
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#include "hb-ot-shape-complex-indic-table.hh"
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static const hb_tag_t indic_basic_features[] =
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{
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HB_TAG('n','u','k','t'),
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HB_TAG('a','k','h','n'),
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HB_TAG('r','p','h','f'),
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HB_TAG('r','k','r','f'),
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HB_TAG('p','r','e','f'),
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HB_TAG('b','l','w','f'),
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HB_TAG('h','a','l','f'),
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HB_TAG('v','a','t','u'),
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HB_TAG('p','s','t','f'),
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HB_TAG('c','j','c','t'),
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};
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static const hb_tag_t indic_other_features[] =
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{
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HB_TAG('p','r','e','s'),
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HB_TAG('a','b','v','s'),
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HB_TAG('b','l','w','s'),
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HB_TAG('p','s','t','s'),
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HB_TAG('h','a','l','n'),
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HB_TAG('d','i','s','t'),
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HB_TAG('a','b','v','m'),
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HB_TAG('b','l','w','m'),
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};
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void
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_hb_ot_shape_complex_collect_features_indic (hb_ot_shape_planner_t *planner, const hb_segment_properties_t *props)
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{
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for (unsigned int i = 0; i < ARRAY_LENGTH (indic_basic_features); i++)
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planner->map.add_bool_feature (indic_basic_features[i], false);
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for (unsigned int i = 0; i < ARRAY_LENGTH (indic_other_features); i++)
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planner->map.add_bool_feature (indic_other_features[i], true);
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}
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void
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_hb_ot_shape_complex_setup_masks_indic (hb_ot_shape_context_t *c)
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{
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unsigned int count = c->buffer->len;
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for (unsigned int i = 0; i < count; i++)
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{
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unsigned int this_type = get_indic_categories (c->buffer->info[i].codepoint);
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c->buffer->info[i].indic_categories() = this_type;
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}
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hb_mask_t mask_array[ARRAY_LENGTH (indic_basic_features)] = {0};
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unsigned int num_masks = ARRAY_LENGTH (indic_basic_features);
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for (unsigned int i = 0; i < num_masks; i++)
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mask_array[i] = c->plan->map.get_1_mask (indic_basic_features[i]);
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}
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HB_END_DECLS
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