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