[indic] Pass zero-context=false to would_substitute for newer scripts
For scripts without an old/new spec distinction, use zero-context=false. This changes behavior in Sinhala / Khmer, but doesn't seem to regress. This will be useful and used in Javanese.
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@ -468,8 +468,9 @@ override_features_indic (hb_ot_shape_planner_t *plan)
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struct would_substitute_feature_t
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struct would_substitute_feature_t
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{
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{
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inline void init (const hb_ot_map_t *map, hb_tag_t feature_tag)
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inline void init (const hb_ot_map_t *map, hb_tag_t feature_tag, bool zero_context_)
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{
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{
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zero_context = zero_context_;
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map->get_stage_lookups (0/*GSUB*/,
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map->get_stage_lookups (0/*GSUB*/,
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map->get_feature_stage (0/*GSUB*/, feature_tag),
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map->get_feature_stage (0/*GSUB*/, feature_tag),
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&lookups, &count);
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&lookups, &count);
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@ -477,7 +478,6 @@ struct would_substitute_feature_t
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inline bool would_substitute (const hb_codepoint_t *glyphs,
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inline bool would_substitute (const hb_codepoint_t *glyphs,
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unsigned int glyphs_count,
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unsigned int glyphs_count,
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bool zero_context,
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hb_face_t *face) const
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hb_face_t *face) const
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{
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{
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for (unsigned int i = 0; i < count; i++)
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for (unsigned int i = 0; i < count; i++)
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@ -489,6 +489,7 @@ struct would_substitute_feature_t
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private:
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private:
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const hb_ot_map_t::lookup_map_t *lookups;
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const hb_ot_map_t::lookup_map_t *lookups;
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unsigned int count;
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unsigned int count;
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bool zero_context;
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};
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};
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struct indic_shape_plan_t
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struct indic_shape_plan_t
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@ -544,10 +545,13 @@ data_create_indic (const hb_ot_shape_plan_t *plan)
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indic_plan->is_old_spec = indic_plan->config->has_old_spec && ((plan->map.chosen_script[0] & 0x000000FF) != '2');
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indic_plan->is_old_spec = indic_plan->config->has_old_spec && ((plan->map.chosen_script[0] & 0x000000FF) != '2');
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indic_plan->virama_glyph = (hb_codepoint_t) -1;
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indic_plan->virama_glyph = (hb_codepoint_t) -1;
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indic_plan->rphf.init (&plan->map, HB_TAG('r','p','h','f'));
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/* Use zero-context would_substitute() matching for new-spec of the main
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indic_plan->pref.init (&plan->map, HB_TAG('p','r','e','f'));
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* Indic scripts, but not for old-spec or scripts with one spec only. */
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indic_plan->blwf.init (&plan->map, HB_TAG('b','l','w','f'));
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bool zero_context = indic_plan->config->has_old_spec || !indic_plan->is_old_spec;
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indic_plan->pstf.init (&plan->map, HB_TAG('p','s','t','f'));
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indic_plan->rphf.init (&plan->map, HB_TAG('r','p','h','f'), zero_context);
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indic_plan->pref.init (&plan->map, HB_TAG('p','r','e','f'), zero_context);
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indic_plan->blwf.init (&plan->map, HB_TAG('b','l','w','f'), zero_context);
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indic_plan->pstf.init (&plan->map, HB_TAG('p','s','t','f'), zero_context);
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for (unsigned int i = 0; i < ARRAY_LENGTH (indic_plan->mask_array); i++)
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for (unsigned int i = 0; i < ARRAY_LENGTH (indic_plan->mask_array); i++)
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indic_plan->mask_array[i] = (indic_features[i].flags & F_GLOBAL) ?
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indic_plan->mask_array[i] = (indic_features[i].flags & F_GLOBAL) ?
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@ -577,16 +581,15 @@ consonant_position_from_face (const indic_shape_plan_t *indic_plan,
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* 930,94D in 'blwf', not the expected 94D,930 (with new-spec
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* 930,94D in 'blwf', not the expected 94D,930 (with new-spec
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* table). As such, we simply match both sequences. Seems
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* table). As such, we simply match both sequences. Seems
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* to work. */
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* to work. */
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bool zero_context = indic_plan->is_old_spec ? false : true;
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hb_codepoint_t glyphs_r[2] = {glyphs[1], glyphs[0]};
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hb_codepoint_t glyphs_r[2] = {glyphs[1], glyphs[0]};
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if (indic_plan->blwf.would_substitute (glyphs , 2, zero_context, face) ||
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if (indic_plan->blwf.would_substitute (glyphs , 2, face) ||
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indic_plan->blwf.would_substitute (glyphs_r, 2, zero_context, face))
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indic_plan->blwf.would_substitute (glyphs_r, 2, face))
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return POS_BELOW_C;
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return POS_BELOW_C;
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if (indic_plan->pstf.would_substitute (glyphs , 2, zero_context, face) ||
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if (indic_plan->pstf.would_substitute (glyphs , 2, face) ||
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indic_plan->pstf.would_substitute (glyphs_r, 2, zero_context, face))
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indic_plan->pstf.would_substitute (glyphs_r, 2, face))
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return POS_POST_C;
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return POS_POST_C;
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if (indic_plan->pref.would_substitute (glyphs , 2, zero_context, face) ||
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if (indic_plan->pref.would_substitute (glyphs , 2, face) ||
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indic_plan->pref.would_substitute (glyphs_r, 2, zero_context, face))
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indic_plan->pref.would_substitute (glyphs_r, 2, face))
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return POS_POST_C;
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return POS_POST_C;
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return POS_BASE_C;
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return POS_BASE_C;
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}
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}
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@ -707,7 +710,7 @@ initial_reordering_consonant_syllable (const hb_ot_shape_plan_t *plan,
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{
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{
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/* See if it matches the 'rphf' feature. */
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/* See if it matches the 'rphf' feature. */
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hb_codepoint_t glyphs[2] = {info[start].codepoint, info[start + 1].codepoint};
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hb_codepoint_t glyphs[2] = {info[start].codepoint, info[start + 1].codepoint};
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if (indic_plan->rphf.would_substitute (glyphs, ARRAY_LENGTH (glyphs), true, face))
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if (indic_plan->rphf.would_substitute (glyphs, ARRAY_LENGTH (glyphs), face))
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{
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{
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limit += 2;
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limit += 2;
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while (limit < end && is_joiner (info[limit]))
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while (limit < end && is_joiner (info[limit]))
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@ -1068,7 +1071,7 @@ initial_reordering_consonant_syllable (const hb_ot_shape_plan_t *plan,
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/* Find a Halant,Ra sequence and mark it for pre-base reordering processing. */
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/* Find a Halant,Ra sequence and mark it for pre-base reordering processing. */
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for (unsigned int i = base + 1; i + 1 < end; i++) {
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for (unsigned int i = base + 1; i + 1 < end; i++) {
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hb_codepoint_t glyphs[2] = {info[i].codepoint, info[i + 1].codepoint};
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hb_codepoint_t glyphs[2] = {info[i].codepoint, info[i + 1].codepoint};
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if (indic_plan->pref.would_substitute (glyphs, ARRAY_LENGTH (glyphs), true, face))
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if (indic_plan->pref.would_substitute (glyphs, ARRAY_LENGTH (glyphs), face))
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{
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{
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info[i++].mask |= indic_plan->mask_array[PREF];
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info[i++].mask |= indic_plan->mask_array[PREF];
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info[i++].mask |= indic_plan->mask_array[PREF];
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info[i++].mask |= indic_plan->mask_array[PREF];
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@ -1734,7 +1737,7 @@ decompose_indic (const hb_ot_shape_normalize_context_t *c,
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if (hb_options ().uniscribe_bug_compatible ||
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if (hb_options ().uniscribe_bug_compatible ||
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(c->font->get_glyph (ab, 0, &glyph) &&
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(c->font->get_glyph (ab, 0, &glyph) &&
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indic_plan->pstf.would_substitute (&glyph, 1, true, c->font->face)))
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indic_plan->pstf.would_substitute (&glyph, 1, c->font->face)))
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{
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{
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/* Ok, safe to use Uniscribe-style decomposition. */
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/* Ok, safe to use Uniscribe-style decomposition. */
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*a = 0x0DD9;
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*a = 0x0DD9;
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