hb-ot-hhea-table.hh revision 13240:8c09472c3de2
126219Swpaul/* 226219Swpaul * Copyright �� 2011,2012 Google, Inc. 326219Swpaul * 492990Sobrien * This is part of HarfBuzz, a text shaping library. 592990Sobrien * 692990Sobrien * Permission is hereby granted, without written agreement and without 7261046Smav * license or royalty fees, to use, copy, modify, and distribute this 8261046Smav * software and its documentation for any purpose, provided that the 9261046Smav * above copyright notice and the following two paragraphs appear in 10261046Smav * all copies of this software. 11261046Smav * 12261046Smav * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR 13261046Smav * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES 14261046Smav * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN 15261046Smav * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH 16261046Smav * DAMAGE. 17261046Smav * 18261046Smav * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, 19261046Smav * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 20261046Smav * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS 2126219Swpaul * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO 22261046Smav * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. 23261046Smav * 24261046Smav * Google Author(s): Behdad Esfahbod 25261046Smav */ 26261046Smav 27261046Smav#ifndef HB_OT_HHEA_TABLE_HH 28261046Smav#define HB_OT_HHEA_TABLE_HH 29261046Smav 30261046Smav#include "hb-open-type-private.hh" 31261046Smav 32261046Smav 3326219Swpaulnamespace OT { 3426219Swpaul 3574462Salfred 3626219Swpaul/* 3726219Swpaul * hhea -- The Horizontal Header Table 3826219Swpaul * vhea -- The Vertical Header Table 3926219Swpaul */ 4026219Swpaul 4126219Swpaul#define HB_OT_TAG_hhea HB_TAG('h','h','e','a') 4274462Salfred#define HB_OT_TAG_vhea HB_TAG('v','h','e','a') 4326219Swpaul 4426219Swpaul 4526219Swpaulstruct _hea 4626219Swpaul{ 4774462Salfred static const hb_tag_t tableTag = HB_TAG('_','h','e','a'); 4826219Swpaul 4926219Swpaul static const hb_tag_t hheaTag = HB_OT_TAG_hhea; 5026219Swpaul static const hb_tag_t vheaTag = HB_OT_TAG_vhea; 5126219Swpaul 5226219Swpaul inline bool sanitize (hb_sanitize_context_t *c) const 5326219Swpaul { 5426219Swpaul TRACE_SANITIZE (this); 5526219Swpaul return_trace (c->check_struct (this) && likely (version.major == 1)); 56173763Sjb } 5726219Swpaul 5826219Swpaul public: 5926219Swpaul FixedVersion version; /* 0x00010000u for version 1.0. */ 60173763Sjb FWORD ascender; /* Typographic ascent. */ 6126219Swpaul FWORD descender; /* Typographic descent. */ 6226219Swpaul FWORD lineGap; /* Typographic line gap. */ 6374462Salfred UFWORD advanceMax; /* Maximum advance width/height value in 6474462Salfred * metrics table. */ 6574462Salfred FWORD minLeadingBearing; /* Minimum left/top sidebearing value in 6674462Salfred * metrics table. */ 6774462Salfred FWORD minTrailingBearing; /* Minimum right/bottom sidebearing value; 6874462Salfred * calculated as Min(aw - lsb - 6926219Swpaul * (xMax - xMin)) for horizontal. */ 7026219Swpaul FWORD maxExtent; /* horizontal: Max(lsb + (xMax - xMin)), 7174462Salfred * vertical: minLeadingBearing+(yMax-yMin). */ 7274462Salfred SHORT caretSlopeRise; /* Used to calculate the slope of the 7326219Swpaul * cursor (rise/run); 1 for vertical caret, 7426219Swpaul * 0 for horizontal.*/ 7526219Swpaul SHORT caretSlopeRun; /* 0 for vertical caret, 1 for horizontal. */ 7626219Swpaul SHORT caretOffset; /* The amount by which a slanted 7726219Swpaul * highlight on a glyph needs 7826219Swpaul * to be shifted to produce the 7926219Swpaul * best appearance. Set to 0 for 8026219Swpaul * non-slanted fonts. */ 8126219Swpaul SHORT reserved1; /* Set to 0. */ 8292889Sobrien SHORT reserved2; /* Set to 0. */ 8392889Sobrien SHORT reserved3; /* Set to 0. */ 8426219Swpaul SHORT reserved4; /* Set to 0. */ 8526219Swpaul SHORT metricDataFormat; /* 0 for current format. */ 8626219Swpaul USHORT numberOfLongMetrics; /* Number of LongMetric entries in metric 8726219Swpaul * table. */ 8874462Salfred public: 8974462Salfred DEFINE_SIZE_STATIC (36); 9074462Salfred}; 9174462Salfred 9226219Swpaulstruct hhea : _hea { 9326219Swpaul static const hb_tag_t tableTag = HB_OT_TAG_hhea; 94}; 95struct vhea : _hea { 96 static const hb_tag_t tableTag = HB_OT_TAG_vhea; 97}; 98 99 100} /* namespace OT */ 101 102 103#endif /* HB_OT_HHEA_TABLE_HH */ 104