diff options
Diffstat (limited to 'thirdparty/harfbuzz/src/hb-ms-feature-ranges.hh')
| -rw-r--r-- | thirdparty/harfbuzz/src/hb-ms-feature-ranges.hh | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/thirdparty/harfbuzz/src/hb-ms-feature-ranges.hh b/thirdparty/harfbuzz/src/hb-ms-feature-ranges.hh new file mode 100644 index 0000000000..401d1e1d97 --- /dev/null +++ b/thirdparty/harfbuzz/src/hb-ms-feature-ranges.hh @@ -0,0 +1,96 @@ +/* + * 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 */ |