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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_HMTX_TABLE_HH |
| 28 #define HB_OT_HMTX_TABLE_HH |
| 29 |
| 30 #include "hb-open-type-private.hh" |
| 31 |
| 32 |
| 33 |
| 34 /* |
| 35 * hmtx -- The Horizontal Metrics Table |
| 36 */ |
| 37 |
| 38 #define HB_OT_TAG_hmtx HB_TAG('h','m','t','x') |
| 39 |
| 40 |
| 41 struct LongHorMetric |
| 42 { |
| 43 USHORT advanceWidth; |
| 44 SHORT lsb; |
| 45 public: |
| 46 DEFINE_SIZE_STATIC (4); |
| 47 }; |
| 48 |
| 49 struct hmtx |
| 50 { |
| 51 static const hb_tag_t Tag = HB_OT_TAG_hmtx; |
| 52 |
| 53 inline bool sanitize (hb_sanitize_context_t *c) { |
| 54 TRACE_SANITIZE (); |
| 55 /* We don't check for anything specific here. The users of the |
| 56 * struct do all the hard work... */ |
| 57 return true; |
| 58 } |
| 59 |
| 60 private: |
| 61 LongHorMetric longHorMetric[VAR]; /* Paired advance width and left side |
| 62 * bearing values for each glyph. The |
| 63 * value numOfHMetrics comes from |
| 64 * the 'hhea' table. If the font is |
| 65 * monospaced, only one entry need |
| 66 * be in the array, but that entry is |
| 67 * required. The last entry applies to |
| 68 * all subsequent glyphs. */ |
| 69 SHORT leftSideBearingX[VAR]; /* Here the advanceWidth is assumed |
| 70 * to be the same as the advanceWidth |
| 71 * for the last entry above. The |
| 72 * number of entries in this array is |
| 73 * derived from numGlyphs (from 'maxp' |
| 74 * table) minus numberOfHMetrics. This |
| 75 * generally is used with a run of |
| 76 * monospaced glyphs (e.g., Kanji |
| 77 * fonts or Courier fonts). Only one |
| 78 * run is allowed and it must be at |
| 79 * the end. This allows a monospaced |
| 80 * font to vary the left side bearing |
| 81 * values for each glyph. */ |
| 82 public: |
| 83 DEFINE_SIZE_ARRAY2 (0, longHorMetric, leftSideBearingX); |
| 84 }; |
| 85 |
| 86 #endif /* HB_OT_HMTX_TABLE_HH */ |
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