| /* | |
| * 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) && | |
| hb_barrier () && | |
| 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 */ |