1 /* 2 * Copyright 2011,2012 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 namespace OT { 34 35 36 /* 37 * hmtx -- The Horizontal Metrics Table 38 */ 39 40 #define HB_OT_TAG_hmtx HB_TAG('h','m','t','x') 41 42 43 struct LongHorMetric 44 { 45 USHORT advanceWidth; 46 SHORT lsb; 47 public: 48 DEFINE_SIZE_STATIC (4); 49 }; 50 51 struct hmtx 52 { 53 static const hb_tag_t Tag = HB_OT_TAG_hmtx; 54 55 inline bool sanitize (hb_sanitize_context_t *c) { 56 TRACE_SANITIZE (this); 57 /* We don't check for anything specific here. The users of the 58 * struct do all the hard work... */ 59 return TRACE_RETURN (true); 60 } 61 62 protected: 63 LongHorMetric longHorMetric[VAR]; /* Paired advance width and left side 64 * bearing values for each glyph. The 65 * value numOfHMetrics comes from 66 * the 'hhea' table. If the font is 67 * monospaced, only one entry need 68 * be in the array, but that entry is 69 * required. The last entry applies to 70 * all subsequent glyphs. */ 71 SHORT leftSideBearingX[VAR]; /* Here the advanceWidth is assumed 72 * to be the same as the advanceWidth 73 * for the last entry above. The 74 * number of entries in this array is 75 * derived from numGlyphs (from 'maxp' 76 * table) minus numberOfHMetrics. This 77 * generally is used with a run of 78 * monospaced glyphs (e.g., Kanji 79 * fonts or Courier fonts). Only one 80 * run is allowed and it must be at 81 * the end. This allows a monospaced 82 * font to vary the left side bearing 83 * values for each glyph. */ 84 public: 85 DEFINE_SIZE_ARRAY2 (0, longHorMetric, leftSideBearingX); 86 }; 87 88 89 } /* namespace OT */ 90 91 92 #endif /* HB_OT_HMTX_TABLE_HH */ 93
