1/*
2 * Copyright © 2018 Ebrahim Byagowi
3 *
4 * This is part of HarfBuzz, a text shaping library.
5 *
6 * Permission is hereby granted, without written agreement and without
7 * license or royalty fees, to use, copy, modify, and distribute this
8 * software and its documentation for any purpose, provided that the
9 * above copyright notice and the following two paragraphs appear in
10 * all copies of this software.
11 *
12 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
13 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
14 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
15 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
16 * DAMAGE.
17 *
18 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
19 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
20 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
21 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
22 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
23 */
24
25#ifndef HB_OT_GASP_TABLE_HH
26#define HB_OT_GASP_TABLE_HH
27
28#include "hb-open-type.hh"
29#include "hb-ot-hhea-table.hh"
30#include "hb-ot-os2-table.hh"
31#include "hb-ot-var-hvar-table.hh"
32
33/*
34 * gasp -- Grid-fitting and Scan-conversion Procedure
35 * https://docs.microsoft.com/en-us/typography/opentype/spec/gasp
36 */
37#define HB_OT_TAG_gasp HB_TAG('g','a','s','p')
38
39
40namespace OT {
41
42struct GaspRange
43{
44 bool sanitize (hb_sanitize_context_t *c) const
45 {
46 TRACE_SANITIZE (this);
47 return_trace (c->check_struct (this));
48 }
49
50 public:
51 HBUINT16 rangeMaxPPEM; /* Upper limit of range, in PPEM */
52 HBUINT16 rangeGaspBehavior;
53 /* Flags describing desired rasterizer behavior. */
54 public:
55 DEFINE_SIZE_STATIC (4);
56};
57
58struct gasp
59{
60 static constexpr hb_tag_t tableTag = HB_OT_TAG_gasp;
61
62 const GaspRange &get_gasp_range (unsigned int i) const
63 { return gaspRanges[i]; }
64
65 bool sanitize (hb_sanitize_context_t *c) const
66 {
67 TRACE_SANITIZE (this);
68 return_trace (c->check_struct (this) &&
69 gaspRanges.sanitize (c));
70 }
71
72 protected:
73 HBUINT16 version; /* Version number (set to 1) */
74 ArrayOf<GaspRange>
75 gaspRanges; /* Number of records to follow
76 * Sorted by ppem */
77 public:
78 DEFINE_SIZE_ARRAY (4, gaspRanges);
79};
80
81} /* namespace OT */
82
83
84#endif /* HB_OT_GASP_TABLE_HH */
85