diff options
Diffstat (limited to 'thirdparty/harfbuzz/src/hb-ot-layout.cc')
| -rw-r--r-- | thirdparty/harfbuzz/src/hb-ot-layout.cc | 123 |
1 files changed, 110 insertions, 13 deletions
diff --git a/thirdparty/harfbuzz/src/hb-ot-layout.cc b/thirdparty/harfbuzz/src/hb-ot-layout.cc index f9c0daa486..dbb30076a2 100644 --- a/thirdparty/harfbuzz/src/hb-ot-layout.cc +++ b/thirdparty/harfbuzz/src/hb-ot-layout.cc @@ -601,9 +601,13 @@ hb_ot_layout_table_select_script (hb_face_t *face, * @feature_tags: (out) (array length=feature_count): Array of feature tags found in the table * * Fetches a list of all feature tags in the given face's GSUB or GPOS table. + * Note that there might be duplicate feature tags, belonging to different + * script/language-system pairs of the table. * * Return value: Total number of feature tags. * + * Since: 0.6.0 + * **/ unsigned int hb_ot_layout_table_get_feature_tags (hb_face_t *face, @@ -629,6 +633,9 @@ hb_ot_layout_table_get_feature_tags (hb_face_t *face, * or GPOS table. * * Return value: `true` if the feature is found, `false` otherwise + * + * Since: 0.6.0 + * **/ bool hb_ot_layout_table_find_feature (hb_face_t *face, @@ -668,6 +675,8 @@ hb_ot_layout_table_find_feature (hb_face_t *face, * * Return value: Total number of language tags. * + * Since: 0.6.0 + * **/ unsigned int hb_ot_layout_script_get_language_tags (hb_face_t *face, @@ -778,6 +787,8 @@ hb_ot_layout_script_select_language (hb_face_t *face, * * Return value: `true` if the feature is found, `false` otherwise * + * Since: 0.6.0 + * **/ hb_bool_t hb_ot_layout_language_get_required_feature_index (hb_face_t *face, @@ -846,6 +857,9 @@ hb_ot_layout_language_get_required_feature (hb_face_t *face, * returned will begin at the offset provided. * * Return value: Total number of features. + * + * Since: 0.6.0 + * **/ unsigned int hb_ot_layout_language_get_feature_indexes (hb_face_t *face, @@ -879,6 +893,9 @@ hb_ot_layout_language_get_feature_indexes (hb_face_t *face, * returned will begin at the offset provided. * * Return value: Total number of feature tags. + * + * Since: 0.6.0 + * **/ unsigned int hb_ot_layout_language_get_feature_tags (hb_face_t *face, @@ -919,6 +936,8 @@ hb_ot_layout_language_get_feature_tags (hb_face_t *face, * * Return value: `true` if the feature is found, `false` otherwise * + * Since: 0.6.0 + * **/ hb_bool_t hb_ot_layout_language_find_feature (hb_face_t *face, @@ -1167,9 +1186,12 @@ script_collect_features (hb_collect_features_context_t *c, * hb_ot_layout_collect_features: * @face: #hb_face_t to work upon * @table_tag: #HB_OT_TAG_GSUB or #HB_OT_TAG_GPOS - * @scripts: The array of scripts to collect features for - * @languages: The array of languages to collect features for - * @features: The array of features to collect + * @scripts: (nullable) (array zero-terminated=1): The array of scripts to collect features for, + * terminated by %HB_TAG_NONE + * @languages: (nullable) (array zero-terminated=1): The array of languages to collect features for, + * terminated by %HB_TAG_NONE + * @features: (nullable) (array zero-terminated=1): The array of features to collect, + * terminated by %HB_TAG_NONE * @feature_indexes: (out): The array of feature indexes found for the query * * Fetches a list of all feature indexes in the specified face's GSUB table @@ -1216,9 +1238,12 @@ hb_ot_layout_collect_features (hb_face_t *face, * hb_ot_layout_collect_lookups: * @face: #hb_face_t to work upon * @table_tag: #HB_OT_TAG_GSUB or #HB_OT_TAG_GPOS - * @scripts: The array of scripts to collect lookups for - * @languages: The array of languages to collect lookups for - * @features: The array of features to collect lookups for + * @scripts: (nullable) (array zero-terminated=1): The array of scripts to collect lookups for, + * terminated by %HB_TAG_NONE + * @languages: (nullable) (array zero-terminated=1): The array of languages to collect lookups for, + * terminated by %HB_TAG_NONE + * @features: (nullable) (array zero-terminated=1): The array of features to collect lookups for, + * terminated by %HB_TAG_NONE * @lookup_indexes: (out): The array of lookup indexes found for the query * * Fetches a list of all feature-lookup indexes in the specified face's GSUB @@ -1246,7 +1271,7 @@ hb_ot_layout_collect_lookups (hb_face_t *face, hb_set_next (&feature_indexes, &feature_index);) g.get_feature (feature_index).add_lookup_indexes_to (lookup_indexes); - g.feature_variation_collect_lookups (&feature_indexes, lookup_indexes); + g.feature_variation_collect_lookups (&feature_indexes, nullptr, lookup_indexes); } @@ -1316,6 +1341,8 @@ hb_ot_layout_lookup_collect_glyphs (hb_face_t *face, * * Return value: `true` if feature variations were found, `false` otherwise. * + * Since: 1.4.0 + * **/ hb_bool_t hb_ot_layout_table_find_feature_variations (hb_face_t *face, @@ -1347,6 +1374,8 @@ hb_ot_layout_table_find_feature_variations (hb_face_t *face, * * Return value: Total number of lookups. * + * Since: 1.4.0 + * **/ unsigned int hb_ot_layout_feature_with_variations_get_lookups (hb_face_t *face, @@ -1379,6 +1408,8 @@ hb_ot_layout_feature_with_variations_get_lookups (hb_face_t *face, * * Return value: `true` if data found, `false` otherwise * + * Since: 0.6.0 + * **/ hb_bool_t hb_ot_layout_has_substitution (hb_face_t *face) @@ -1678,6 +1709,8 @@ hb_ot_layout_get_size_params (hb_face_t *face, return false; } + + /** * hb_ot_layout_feature_get_name_ids: * @face: #hb_face_t to work upon @@ -2297,11 +2330,6 @@ struct hb_get_glyph_alternates_dispatch_t : static return_t default_return_value () { return 0; } bool stop_sublookup_iteration (return_t r) const { return r; } - hb_face_t *face; - - hb_get_glyph_alternates_dispatch_t (hb_face_t *face) : - face (face) {} - private: template <typename T, typename ...Ts> auto _dispatch (const T &obj, hb_priority<1>, Ts&&... ds) HB_AUTO_RETURN @@ -2315,6 +2343,7 @@ struct hb_get_glyph_alternates_dispatch_t : ( _dispatch (obj, hb_prioritize, std::forward<Ts> (ds)...) ) }; +#ifndef HB_NO_LAYOUT_RARELY_USED /** * hb_ot_layout_lookup_get_glyph_alternates: * @face: a face. @@ -2340,11 +2369,79 @@ hb_ot_layout_lookup_get_glyph_alternates (hb_face_t *face, unsigned *alternate_count /* IN/OUT. May be NULL. */, hb_codepoint_t *alternate_glyphs /* OUT. May be NULL. */) { - hb_get_glyph_alternates_dispatch_t c (face); + hb_get_glyph_alternates_dispatch_t c; const OT::SubstLookup &lookup = face->table.GSUB->table->get_lookup (lookup_index); auto ret = lookup.dispatch (&c, glyph, start_offset, alternate_count, alternate_glyphs); if (!ret && alternate_count) *alternate_count = 0; return ret; } + +struct hb_position_single_dispatch_t : + hb_dispatch_context_t<hb_position_single_dispatch_t, bool> +{ + static return_t default_return_value () { return false; } + bool stop_sublookup_iteration (return_t r) const { return r; } + + private: + template <typename T, typename ...Ts> auto + _dispatch (const T &obj, hb_priority<1>, Ts&&... ds) HB_AUTO_RETURN + ( obj.position_single (std::forward<Ts> (ds)...) ) + template <typename T, typename ...Ts> auto + _dispatch (const T &obj, hb_priority<0>, Ts&&... ds) HB_AUTO_RETURN + ( default_return_value () ) + public: + template <typename T, typename ...Ts> auto + dispatch (const T &obj, Ts&&... ds) HB_AUTO_RETURN + ( _dispatch (obj, hb_prioritize, std::forward<Ts> (ds)...) ) +}; + +/** + * hb_ot_layout_lookup_get_optical_bound: + * @font: a font. + * @lookup_index: index of the feature lookup to query. + * @direction: edge of the glyph to query. + * @glyph: a glyph id. + * + * Fetches the optical bound of a glyph positioned at the margin of text. + * The direction identifies which edge of the glyph to query. + * + * Return value: Adjustment value. Negative values mean the glyph will stick out of the margin. + * + * Since: 5.3.0 + **/ +hb_position_t +hb_ot_layout_lookup_get_optical_bound (hb_font_t *font, + unsigned lookup_index, + hb_direction_t direction, + hb_codepoint_t glyph) +{ + const OT::PosLookup &lookup = font->face->table.GPOS->table->get_lookup (lookup_index); + hb_glyph_position_t pos = {0}; + hb_position_single_dispatch_t c; + lookup.dispatch (&c, font, direction, glyph, pos); + hb_position_t ret = 0; + switch (direction) + { + case HB_DIRECTION_LTR: + ret = pos.x_offset; + break; + case HB_DIRECTION_RTL: + ret = pos.x_advance - pos.x_offset; + break; + case HB_DIRECTION_TTB: + ret = pos.y_offset; + break; + case HB_DIRECTION_BTT: + ret = pos.y_advance - pos.y_offset; + break; + case HB_DIRECTION_INVALID: + default: + break; + } + return ret; +} +#endif + + #endif |