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