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/*
* Copyright © 2011,2012,2013 Google, Inc.
* Copyright © 2021 Khaled Hosny
*
* 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_MS_FEATURE_RANGES_HH
#define HB_MS_FEATURE_RANGES_HH
#include "hb.hh"
typedef struct hb_ms_feature_t {
uint32_t tag_le;
uint32_t value;
} hb_ms_feature_t;
typedef struct hb_ms_features_t {
hb_ms_feature_t *features;
uint32_t num_features;
} hb_ms_features_t;
struct hb_ms_active_feature_t {
hb_ms_feature_t fea;
unsigned int order;
HB_INTERNAL static int cmp (const void *pa, const void *pb) {
const auto *a = (const hb_ms_active_feature_t *) pa;
const auto *b = (const hb_ms_active_feature_t *) pb;
return a->fea.tag_le < b->fea.tag_le ? -1 : a->fea.tag_le > b->fea.tag_le ? 1 :
a->order < b->order ? -1 : a->order > b->order ? 1 :
a->fea.value < b->fea.value ? -1 : a->fea.value > b->fea.value ? 1 :
0;
}
bool operator== (const hb_ms_active_feature_t *f)
{ return cmp (this, f) == 0; }
};
struct hb_ms_feature_event_t {
unsigned int index;
bool start;
hb_ms_active_feature_t feature;
HB_INTERNAL static int cmp (const void *pa, const void *pb)
{
const auto *a = (const hb_ms_feature_event_t *) pa;
const auto *b = (const hb_ms_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 :
hb_ms_active_feature_t::cmp (&a->feature, &b->feature);
}
};
struct hb_ms_range_record_t {
hb_ms_features_t features;
unsigned int index_first; /* == start */
unsigned int index_last; /* == end - 1 */
};
HB_INTERNAL bool
hb_ms_setup_features (const hb_feature_t *features,
unsigned int num_features,
hb_vector_t<hb_ms_feature_t> &feature_records, /* OUT */
hb_vector_t<hb_ms_range_record_t> &range_records /* OUT */);
HB_INTERNAL void
hb_ms_make_feature_ranges (hb_vector_t<hb_ms_feature_t> &feature_records,
hb_vector_t<hb_ms_range_record_t> &range_records,
unsigned int chars_offset,
unsigned int chars_len,
uint16_t *log_clusters,
hb_vector_t<hb_ms_features_t*> &range_features, /* OUT */
hb_vector_t<uint32_t> &range_counts /* OUT */);
#endif /* HB_MS_FEATURE_RANGES_HH */
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