2011-08-17 12:43:45 +00:00
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/*
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2012-05-10 23:25:34 +00:00
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* Copyright © 2011,2012 Google, Inc.
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2011-08-17 12:43:45 +00:00
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*
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* This is part of HarfBuzz, a text shaping library.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and its documentation for any purpose, provided that the
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* above copyright notice and the following two paragraphs appear in
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* all copies of this software.
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*
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* Google Author(s): Behdad Esfahbod
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*/
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#ifndef HB_OT_HHEA_TABLE_HH
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#define HB_OT_HHEA_TABLE_HH
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#include "hb-open-type-private.hh"
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/*
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* hhea -- The Horizontal Header Table
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*/
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#define HB_OT_TAG_hhea HB_TAG('h','h','e','a')
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struct hhea
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{
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static const hb_tag_t Tag = HB_OT_TAG_hhea;
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inline bool sanitize (hb_sanitize_context_t *c) {
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TRACE_SANITIZE ();
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2012-05-10 23:25:34 +00:00
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return TRACE_RETURN (c->check_struct (this) && likely (version.major == 1));
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2011-08-17 12:43:45 +00:00
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}
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private:
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FixedVersion version; /* 0x00010000 for version 1.0. */
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FWORD ascender; /* Typographic ascent. <a
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* href="http://developer.apple.com/fonts/TTRefMan/RM06/Chap6hhea.html">
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* (Distance from baseline of highest
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* ascender)</a> */
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FWORD descender; /* Typographic descent. <a
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* href="http://developer.apple.com/fonts/TTRefMan/RM06/Chap6hhea.html">
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* (Distance from baseline of lowest
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* descender)</a> */
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FWORD lineGap; /* Typographic line gap. Negative
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* LineGap values are treated as zero
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* in Windows 3.1, System 6, and
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* System 7. */
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UFWORD advanceWidthMax; /* Maximum advance width value in
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* 'hmtx' table. */
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FWORD minLeftSideBearing; /* Minimum left sidebearing value in
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* 'hmtx' table. */
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FWORD minRightSideBearing; /* Minimum right sidebearing value;
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* calculated as Min(aw - lsb -
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* (xMax - xMin)). */
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FWORD xMaxExtent; /* Max(lsb + (xMax - xMin)). */
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SHORT caretSlopeRise; /* Used to calculate the slope of the
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* cursor (rise/run); 1 for vertical. */
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SHORT caretSlopeRun; /* 0 for vertical. */
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SHORT caretOffset; /* The amount by which a slanted
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* highlight on a glyph needs
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* to be shifted to produce the
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* best appearance. Set to 0 for
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* non--slanted fonts */
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SHORT reserved1; /* set to 0 */
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SHORT reserved2; /* set to 0 */
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SHORT reserved3; /* set to 0 */
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SHORT reserved4; /* set to 0 */
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SHORT metricDataFormat; /* 0 for current format. */
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USHORT numberOfHMetrics; /* Number of hMetric entries in 'hmtx'
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* table */
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public:
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DEFINE_SIZE_STATIC (36);
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};
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#endif /* HB_OT_HHEA_TABLE_HH */
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