The Tor Browser: gfx/harfbuzz/src/hb-ot-hmtx-table.hh@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     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  */

    27 #ifndef HB_OT_HMTX_TABLE_HH

    28 #define HB_OT_HMTX_TABLE_HH

    30 #include "hb-open-type-private.hh"

    33 namespace OT {

    36 /*

    37  * hmtx -- The Horizontal Metrics Table

    38  */

    40 #define HB_OT_TAG_hmtx HB_TAG('h','m','t','x')

    43 struct LongHorMetric

    44 {

    45   USHORT	advanceWidth;

    46   SHORT		lsb;

    47   public:

    48   DEFINE_SIZE_STATIC (4);

    49 };

    51 struct hmtx

    52 {

    53   static const hb_tag_t tableTag	= HB_OT_TAG_hmtx;

    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   }

    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 };

    89 } /* namespace OT */

    92 #endif /* HB_OT_HMTX_TABLE_HH */

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