The Tor Browser: gfx/harfbuzz/src/hb-ot-hhea-table.hh@925c144e1f1f

     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_HHEA_TABLE_HH

    28 #define HB_OT_HHEA_TABLE_HH

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

    33 namespace OT {

    36 /*

    37  * hhea -- The Horizontal Header Table

    38  */

    40 #define HB_OT_TAG_hhea HB_TAG('h','h','e','a')

    43 struct hhea

    44 {

    45   static const hb_tag_t tableTag	= HB_OT_TAG_hhea;

    47   inline bool sanitize (hb_sanitize_context_t *c) {

    48     TRACE_SANITIZE (this);

    49     return TRACE_RETURN (c->check_struct (this) && likely (version.major == 1));

    50   }

    52   protected:

    53   FixedVersion	version;		/* 0x00010000 for version 1.0. */

    54   FWORD		ascender;		/* Typographic ascent. <a

    55 					 * href="http://developer.apple.com/fonts/TTRefMan/RM06/Chap6hhea.html">

    56 					 * (Distance from baseline of highest

    57 					 * ascender)</a> */

    58   FWORD		descender;		/* Typographic descent. <a

    59 					 * href="http://developer.apple.com/fonts/TTRefMan/RM06/Chap6hhea.html">

    60 					 * (Distance from baseline of lowest

    61 					 * descender)</a> */

    62   FWORD		lineGap;		/* Typographic line gap. Negative

    63 					 * LineGap values are treated as zero

    64 					 * in Windows 3.1, System 6, and

    65 					 * System 7. */

    66   UFWORD	advanceWidthMax;	/* Maximum advance width value in

    67 					 * 'hmtx' table. */

    68   FWORD		minLeftSideBearing;	/* Minimum left sidebearing value in

    69 					 * 'hmtx' table. */

    70   FWORD		minRightSideBearing;	/* Minimum right sidebearing value;

    71 					 * calculated as Min(aw - lsb -

    72 					 * (xMax - xMin)). */

    73   FWORD		xMaxExtent;		/* Max(lsb + (xMax - xMin)). */

    74   SHORT		caretSlopeRise;		/* Used to calculate the slope of the

    75 					 * cursor (rise/run); 1 for vertical. */

    76   SHORT		caretSlopeRun;		/* 0 for vertical. */

    77   SHORT		caretOffset;		/* The amount by which a slanted

    78 					 * highlight on a glyph needs

    79 					 * to be shifted to produce the

    80 					 * best appearance. Set to 0 for

    81 					 * non--slanted fonts */

    82   SHORT		reserved1;		/* set to 0 */

    83   SHORT		reserved2;		/* set to 0 */

    84   SHORT		reserved3;		/* set to 0 */

    85   SHORT		reserved4;		/* set to 0 */

    86   SHORT		metricDataFormat;	/* 0 for current format. */

    87   USHORT	numberOfHMetrics;	/* Number of hMetric entries in 'hmtx'

    88 					 * table */

    89   public:

    90   DEFINE_SIZE_STATIC (36);

    91 };

    94 } /* namespace OT */

    97 #endif /* HB_OT_HHEA_TABLE_HH */

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