124 lines
3.4 KiB
C++
124 lines
3.4 KiB
C++
/*
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* Copyright © 2018 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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#ifndef HB_AAT_MAP_HH
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#define HB_AAT_MAP_HH
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#include "hb.hh"
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struct hb_aat_map_t
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{
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friend struct hb_aat_map_builder_t;
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public:
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struct range_flags_t
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{
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hb_mask_t flags;
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unsigned cluster_first;
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unsigned cluster_last; // end - 1
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};
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public:
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hb_vector_t<hb_sorted_vector_t<range_flags_t>> chain_flags;
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};
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struct hb_aat_map_builder_t
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{
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public:
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HB_INTERNAL hb_aat_map_builder_t (hb_face_t *face_,
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const hb_segment_properties_t props_) :
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face (face_),
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props (props_) {}
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HB_INTERNAL void add_feature (const hb_feature_t &feature);
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HB_INTERNAL void compile (hb_aat_map_t &m);
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public:
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struct feature_info_t
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{
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hb_aat_layout_feature_type_t type;
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hb_aat_layout_feature_selector_t setting;
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bool is_exclusive;
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unsigned seq; /* For stable sorting only. */
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HB_INTERNAL static int cmp (const void *pa, const void *pb)
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{
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const feature_info_t *a = (const feature_info_t *) pa;
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const feature_info_t *b = (const feature_info_t *) pb;
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if (a->type != b->type) return (a->type < b->type ? -1 : 1);
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if (!a->is_exclusive &&
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(a->setting & ~1) != (b->setting & ~1)) return (a->setting < b->setting ? -1 : 1);
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return (a->seq < b->seq ? -1 : a->seq > b->seq ? 1 : 0);
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}
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/* compares type & setting only */
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int cmp (const feature_info_t& f) const
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{
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return (f.type != type) ? (f.type < type ? -1 : 1) :
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(f.setting != setting) ? (f.setting < setting ? -1 : 1) : 0;
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}
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};
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struct feature_range_t
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{
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feature_info_t info;
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unsigned start;
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unsigned end;
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};
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private:
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struct feature_event_t
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{
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unsigned int index;
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bool start;
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feature_info_t feature;
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HB_INTERNAL static int cmp (const void *pa, const void *pb) {
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const feature_event_t *a = (const feature_event_t *) pa;
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const feature_event_t *b = (const feature_event_t *) pb;
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return a->index < b->index ? -1 : a->index > b->index ? 1 :
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a->start < b->start ? -1 : a->start > b->start ? 1 :
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feature_info_t::cmp (&a->feature, &b->feature);
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}
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};
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public:
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hb_face_t *face;
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hb_segment_properties_t props;
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public:
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hb_sorted_vector_t<feature_range_t> features;
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hb_sorted_vector_t<feature_info_t> current_features;
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unsigned range_first = HB_FEATURE_GLOBAL_START;
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unsigned range_last = HB_FEATURE_GLOBAL_END;
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};
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#endif /* HB_AAT_MAP_HH */
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