HarfBuzz text shaping engine
http://harfbuzz.github.io/
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97 lines
3.2 KiB
97 lines
3.2 KiB
/* |
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* Copyright © 2011,2012 Google, Inc. |
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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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namespace OT { |
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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 tableTag = HB_OT_TAG_hhea; |
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inline bool sanitize (hb_sanitize_context_t *c) { |
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TRACE_SANITIZE (this); |
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return TRACE_RETURN (c->check_struct (this) && likely (version.major == 1)); |
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} |
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public: |
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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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} /* namespace OT */ |
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#endif /* HB_OT_HHEA_TABLE_HH */
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