2 * Copyright © 2011,2012 Google, Inc.
4 * This is part of HarfBuzz, a text shaping library.
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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.
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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
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24 * Google Author(s): Behdad Esfahbod
27 #ifndef HB_OT_HMTX_TABLE_HH
28 #define HB_OT_HMTX_TABLE_HH
30 #include "hb-open-type-private.hh"
37 * hmtx -- The Horizontal Metrics Table
38 * vmtx -- The Vertical Metrics Table
41 #define HB_OT_TAG_hmtx HB_TAG('h','m','t','x')
42 #define HB_OT_TAG_vmtx HB_TAG('v','m','t','x')
47 UFWORD advance; /* Advance width/height. */
48 FWORD lsb; /* Leading (left/top) side bearing. */
50 DEFINE_SIZE_STATIC (4);
55 static const hb_tag_t hmtxTag = HB_OT_TAG_hmtx;
56 static const hb_tag_t vmtxTag = HB_OT_TAG_vmtx;
58 inline bool sanitize (hb_sanitize_context_t *c) const
60 TRACE_SANITIZE (this);
61 /* We don't check for anything specific here. The users of the
62 * struct do all the hard work... */
67 LongMetric longMetric[VAR]; /* Paired advance width and leading
68 * bearing values for each glyph. The
69 * value numOfHMetrics comes from
70 * the 'hhea' table. If the font is
71 * monospaced, only one entry need
72 * be in the array, but that entry is
73 * required. The last entry applies to
74 * all subsequent glyphs. */
75 FWORD leadingBearingX[VAR]; /* Here the advance is assumed
76 * to be the same as the advance
77 * for the last entry above. The
78 * number of entries in this array is
79 * derived from numGlyphs (from 'maxp'
80 * table) minus numberOfLongMetrics.
81 * This generally is used with a run
82 * of monospaced glyphs (e.g., Kanji
83 * fonts or Courier fonts). Only one
84 * run is allowed and it must be at
85 * the end. This allows a monospaced
86 * font to vary the side bearing
87 * values for each glyph. */
89 DEFINE_SIZE_ARRAY2 (0, longMetric, leadingBearingX);
92 struct hmtx : hmtxvmtx {
93 static const hb_tag_t tableTag = HB_OT_TAG_hmtx;
95 struct vmtx : hmtxvmtx {
96 static const hb_tag_t tableTag = HB_OT_TAG_vmtx;
102 #endif /* HB_OT_HMTX_TABLE_HH */