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| 1 /* |
| 2 * Copyright © 2011 Google, Inc. |
| 3 * |
| 4 * This is part of HarfBuzz, a text shaping library. |
| 5 * |
| 6 * Permission is hereby granted, without written agreement and without |
| 7 * license or royalty fees, to use, copy, modify, and distribute this |
| 8 * software and its documentation for any purpose, provided that the |
| 9 * above copyright notice and the following two paragraphs appear in |
| 10 * all copies of this software. |
| 11 * |
| 12 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR |
| 13 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES |
| 14 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN |
| 15 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH |
| 16 * DAMAGE. |
| 17 * |
| 18 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, |
| 19 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND |
| 20 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS |
| 21 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO |
| 22 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. |
| 23 * |
| 24 * Google Author(s): Behdad Esfahbod |
| 25 */ |
| 26 |
| 27 #ifndef HB_OT_HHEA_TABLE_HH |
| 28 #define HB_OT_HHEA_TABLE_HH |
| 29 |
| 30 #include "hb-open-type-private.hh" |
| 31 |
| 32 |
| 33 |
| 34 /* |
| 35 * hhea -- The Horizontal Header Table |
| 36 */ |
| 37 |
| 38 #define HB_OT_TAG_hhea HB_TAG('h','h','e','a') |
| 39 |
| 40 |
| 41 struct hhea |
| 42 { |
| 43 static const hb_tag_t Tag = HB_OT_TAG_hhea; |
| 44 |
| 45 inline bool sanitize (hb_sanitize_context_t *c) { |
| 46 TRACE_SANITIZE (); |
| 47 return c->check_struct (this) && likely (version.major == 1); |
| 48 } |
| 49 |
| 50 private: |
| 51 FixedVersion version; /* 0x00010000 for version 1.0. */ |
| 52 FWORD ascender; /* Typographic ascent. <a |
| 53 * href="http://developer.apple.com/font
s/TTRefMan/RM06/Chap6hhea.html"> |
| 54 * (Distance from baseline of highest |
| 55 * ascender)</a> */ |
| 56 FWORD descender; /* Typographic descent. <a |
| 57 * href="http://developer.apple.com/font
s/TTRefMan/RM06/Chap6hhea.html"> |
| 58 * (Distance from baseline of lowest |
| 59 * descender)</a> */ |
| 60 FWORD lineGap; /* Typographic line gap. Negative |
| 61 * LineGap values are treated as zero |
| 62 * in Windows 3.1, System 6, and |
| 63 * System 7. */ |
| 64 UFWORD advanceWidthMax; /* Maximum advance width value in |
| 65 * 'hmtx' table. */ |
| 66 FWORD minLeftSideBearing; /* Minimum left sidebearing value in |
| 67 * 'hmtx' table. */ |
| 68 FWORD minRightSideBearing; /* Minimum right sidebearing value; |
| 69 * calculated as Min(aw - lsb - |
| 70 * (xMax - xMin)). */ |
| 71 FWORD xMaxExtent; /* Max(lsb + (xMax - xMin)). */ |
| 72 SHORT caretSlopeRise; /* Used to calculate the slope of the |
| 73 * cursor (rise/run); 1 for vertical. */ |
| 74 SHORT caretSlopeRun; /* 0 for vertical. */ |
| 75 SHORT caretOffset; /* The amount by which a slanted |
| 76 * highlight on a glyph needs |
| 77 * to be shifted to produce the |
| 78 * best appearance. Set to 0 for |
| 79 * non--slanted fonts */ |
| 80 SHORT reserved1; /* set to 0 */ |
| 81 SHORT reserved2; /* set to 0 */ |
| 82 SHORT reserved3; /* set to 0 */ |
| 83 SHORT reserved4; /* set to 0 */ |
| 84 SHORT metricDataFormat; /* 0 for current format. */ |
| 85 USHORT numberOfHMetrics; /* Number of hMetric entries in 'hmtx' |
| 86 * table */ |
| 87 public: |
| 88 DEFINE_SIZE_STATIC (36); |
| 89 }; |
| 90 |
| 91 |
| 92 #endif /* HB_OT_HHEA_TABLE_HH */ |
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