1*2d1272b8SAndroid Build Coastguard Worker /*
2*2d1272b8SAndroid Build Coastguard Worker * Copyright © 2022 Google, Inc.
3*2d1272b8SAndroid Build Coastguard Worker *
4*2d1272b8SAndroid Build Coastguard Worker * This is part of HarfBuzz, a text shaping library.
5*2d1272b8SAndroid Build Coastguard Worker *
6*2d1272b8SAndroid Build Coastguard Worker * Permission is hereby granted, without written agreement and without
7*2d1272b8SAndroid Build Coastguard Worker * license or royalty fees, to use, copy, modify, and distribute this
8*2d1272b8SAndroid Build Coastguard Worker * software and its documentation for any purpose, provided that the
9*2d1272b8SAndroid Build Coastguard Worker * above copyright notice and the following two paragraphs appear in
10*2d1272b8SAndroid Build Coastguard Worker * all copies of this software.
11*2d1272b8SAndroid Build Coastguard Worker *
12*2d1272b8SAndroid Build Coastguard Worker * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
13*2d1272b8SAndroid Build Coastguard Worker * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
14*2d1272b8SAndroid Build Coastguard Worker * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
15*2d1272b8SAndroid Build Coastguard Worker * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
16*2d1272b8SAndroid Build Coastguard Worker * DAMAGE.
17*2d1272b8SAndroid Build Coastguard Worker *
18*2d1272b8SAndroid Build Coastguard Worker * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
19*2d1272b8SAndroid Build Coastguard Worker * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
20*2d1272b8SAndroid Build Coastguard Worker * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
21*2d1272b8SAndroid Build Coastguard Worker * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
22*2d1272b8SAndroid Build Coastguard Worker * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
23*2d1272b8SAndroid Build Coastguard Worker *
24*2d1272b8SAndroid Build Coastguard Worker */
25*2d1272b8SAndroid Build Coastguard Worker #include "hb-repacker.hh"
26*2d1272b8SAndroid Build Coastguard Worker
27*2d1272b8SAndroid Build Coastguard Worker #ifdef HB_EXPERIMENTAL_API
28*2d1272b8SAndroid Build Coastguard Worker
29*2d1272b8SAndroid Build Coastguard Worker /**
30*2d1272b8SAndroid Build Coastguard Worker * hb_subset_repack_or_fail:
31*2d1272b8SAndroid Build Coastguard Worker * @table_tag: tag of the table being packed, needed to allow table specific optimizations.
32*2d1272b8SAndroid Build Coastguard Worker * @hb_objects: raw array of struct hb_object_t, which provides
33*2d1272b8SAndroid Build Coastguard Worker * object graph info
34*2d1272b8SAndroid Build Coastguard Worker * @num_hb_objs: number of hb_object_t in the hb_objects array.
35*2d1272b8SAndroid Build Coastguard Worker *
36*2d1272b8SAndroid Build Coastguard Worker * Given the input object graph info, repack a table to eliminate
37*2d1272b8SAndroid Build Coastguard Worker * offset overflows. A nullptr is returned if the repacking attempt fails.
38*2d1272b8SAndroid Build Coastguard Worker * Table specific optimizations (eg. extension promotion in GSUB/GPOS) may be performed.
39*2d1272b8SAndroid Build Coastguard Worker * Passing HB_TAG_NONE will disable table specific optimizations.
40*2d1272b8SAndroid Build Coastguard Worker *
41*2d1272b8SAndroid Build Coastguard Worker * XSince: EXPERIMENTAL
42*2d1272b8SAndroid Build Coastguard Worker **/
hb_subset_repack_or_fail(hb_tag_t table_tag,hb_object_t * hb_objects,unsigned num_hb_objs)43*2d1272b8SAndroid Build Coastguard Worker hb_blob_t* hb_subset_repack_or_fail (hb_tag_t table_tag,
44*2d1272b8SAndroid Build Coastguard Worker hb_object_t* hb_objects,
45*2d1272b8SAndroid Build Coastguard Worker unsigned num_hb_objs)
46*2d1272b8SAndroid Build Coastguard Worker {
47*2d1272b8SAndroid Build Coastguard Worker hb_vector_t<const hb_object_t *> packed;
48*2d1272b8SAndroid Build Coastguard Worker packed.alloc (num_hb_objs + 1);
49*2d1272b8SAndroid Build Coastguard Worker packed.push (nullptr);
50*2d1272b8SAndroid Build Coastguard Worker for (unsigned i = 0 ; i < num_hb_objs ; i++)
51*2d1272b8SAndroid Build Coastguard Worker packed.push (&(hb_objects[i]));
52*2d1272b8SAndroid Build Coastguard Worker
53*2d1272b8SAndroid Build Coastguard Worker return hb_resolve_overflows (packed,
54*2d1272b8SAndroid Build Coastguard Worker table_tag,
55*2d1272b8SAndroid Build Coastguard Worker 20,
56*2d1272b8SAndroid Build Coastguard Worker true);
57*2d1272b8SAndroid Build Coastguard Worker }
58*2d1272b8SAndroid Build Coastguard Worker #endif
59