2 * Copyright © 2011,2012 Google, Inc.
4 * This is part of HarfBuzz, a text shaping library.
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.
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
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.
24 * Google Author(s): Behdad Esfahbod
27 #ifndef HB_OT_HHEA_TABLE_HH
28 #define HB_OT_HHEA_TABLE_HH
30 #include "hb-open-type-private.hh"
37 * hhea -- The Horizontal Header Table
38 * vhea -- The Vertical Header Table
41 #define HB_OT_TAG_hhea HB_TAG('h','h','e','a')
42 #define HB_OT_TAG_vhea HB_TAG('v','h','e','a')
47 static const hb_tag_t tableTag
= HB_TAG('_','h','e','a');
49 static const hb_tag_t hheaTag
= HB_OT_TAG_hhea
;
50 static const hb_tag_t vheaTag
= HB_OT_TAG_vhea
;
52 inline bool sanitize (hb_sanitize_context_t
*c
) {
53 TRACE_SANITIZE (this);
54 return TRACE_RETURN (c
->check_struct (this) && likely (version
.major
== 1));
58 FixedVersion version
; /* 0x00010000u for version 1.0. */
59 FWORD ascender
; /* Typographic ascent. */
60 FWORD descender
; /* Typographic descent. */
61 FWORD lineGap
; /* Typographic line gap. */
62 UFWORD advanceMax
; /* Maximum advance width/height value in
64 FWORD minLeadingBearing
; /* Minimum left/top sidebearing value in
66 FWORD minTrailingBearing
; /* Minimum right/bottom sidebearing value;
67 * calculated as Min(aw - lsb -
68 * (xMax - xMin)) for horizontal. */
69 FWORD maxExtent
; /* horizontal: Max(lsb + (xMax - xMin)),
70 * vertical: minLeadingBearing+(yMax-yMin). */
71 SHORT caretSlopeRise
; /* Used to calculate the slope of the
72 * cursor (rise/run); 1 for vertical caret,
74 SHORT caretSlopeRun
; /* 0 for vertical caret, 1 for horizontal. */
75 SHORT caretOffset
; /* The amount by which a slanted
76 * highlight on a glyph needs
77 * to be shifted to produce the
78 * best appearance. Set to 0 for
79 * non-slanted fonts. */
80 SHORT reserved1
; /* Set to 0. */
81 SHORT reserved2
; /* Set to 0. */
82 SHORT reserved3
; /* Set to 0. */
83 SHORT reserved4
; /* Set to 0. */
84 SHORT metricDataFormat
; /* 0 for current format. */
85 USHORT numberOfLongMetrics
; /* Number of LongMetric entries in metric
88 DEFINE_SIZE_STATIC (36);
92 static const hb_tag_t tableTag
= HB_OT_TAG_hhea
;
95 static const hb_tag_t tableTag
= HB_OT_TAG_vhea
;
102 #endif /* HB_OT_HHEA_TABLE_HH */