105 lines
3.3 KiB
C++
105 lines
3.3 KiB
C++
/*
|
|
* 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.hh"
|
|
|
|
/*
|
|
* hhea -- Horizontal Header
|
|
* https://docs.microsoft.com/en-us/typography/opentype/spec/hhea
|
|
* vhea -- Vertical Header
|
|
* https://docs.microsoft.com/en-us/typography/opentype/spec/vhea
|
|
*/
|
|
#define HB_OT_TAG_hhea HB_TAG('h','h','e','a')
|
|
#define HB_OT_TAG_vhea HB_TAG('v','h','e','a')
|
|
|
|
|
|
namespace OT {
|
|
|
|
|
|
template <typename T>
|
|
struct _hea
|
|
{
|
|
bool has_data () const { return version.major; }
|
|
|
|
bool sanitize (hb_sanitize_context_t *c) const
|
|
{
|
|
TRACE_SANITIZE (this);
|
|
return_trace (c->check_struct (this) && likely (version.major == 1));
|
|
}
|
|
|
|
public:
|
|
FixedVersion<>version; /* 0x00010000u for version 1.0. */
|
|
FWORD ascender; /* Typographic ascent. */
|
|
FWORD descender; /* Typographic descent. */
|
|
FWORD lineGap; /* Typographic line gap. */
|
|
UFWORD advanceMax; /* Maximum advance width/height value in
|
|
* metrics table. */
|
|
FWORD minLeadingBearing;
|
|
/* Minimum left/top sidebearing value in
|
|
* metrics table. */
|
|
FWORD minTrailingBearing;
|
|
/* Minimum right/bottom sidebearing value;
|
|
* calculated as Min(aw - lsb -
|
|
* (xMax - xMin)) for horizontal. */
|
|
FWORD maxExtent; /* horizontal: Max(lsb + (xMax - xMin)),
|
|
* vertical: minLeadingBearing+(yMax-yMin). */
|
|
HBINT16 caretSlopeRise; /* Used to calculate the slope of the
|
|
* cursor (rise/run); 1 for vertical caret,
|
|
* 0 for horizontal.*/
|
|
HBINT16 caretSlopeRun; /* 0 for vertical caret, 1 for horizontal. */
|
|
HBINT16 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. */
|
|
HBINT16 reserved1; /* Set to 0. */
|
|
HBINT16 reserved2; /* Set to 0. */
|
|
HBINT16 reserved3; /* Set to 0. */
|
|
HBINT16 reserved4; /* Set to 0. */
|
|
HBINT16 metricDataFormat;/* 0 for current format. */
|
|
HBUINT16 numberOfLongMetrics;
|
|
/* Number of LongMetric entries in metric
|
|
* table. */
|
|
public:
|
|
DEFINE_SIZE_STATIC (36);
|
|
};
|
|
|
|
struct hhea : _hea<hhea> {
|
|
static constexpr hb_tag_t tableTag = HB_OT_TAG_hhea;
|
|
};
|
|
struct vhea : _hea<vhea> {
|
|
static constexpr hb_tag_t tableTag = HB_OT_TAG_vhea;
|
|
};
|
|
|
|
|
|
} /* namespace OT */
|
|
|
|
|
|
#endif /* HB_OT_HHEA_TABLE_HH */
|