michael@0: /*
michael@0:  * Copyright © 2011,2012  Google, Inc.
michael@0:  *
michael@0:  *  This is part of HarfBuzz, a text shaping library.
michael@0:  *
michael@0:  * Permission is hereby granted, without written agreement and without
michael@0:  * license or royalty fees, to use, copy, modify, and distribute this
michael@0:  * software and its documentation for any purpose, provided that the
michael@0:  * above copyright notice and the following two paragraphs appear in
michael@0:  * all copies of this software.
michael@0:  *
michael@0:  * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
michael@0:  * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
michael@0:  * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
michael@0:  * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
michael@0:  * DAMAGE.
michael@0:  *
michael@0:  * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
michael@0:  * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
michael@0:  * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
michael@0:  * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
michael@0:  * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
michael@0:  *
michael@0:  * Google Author(s): Behdad Esfahbod
michael@0:  */
michael@0: 
michael@0: #ifndef HB_OT_HHEA_TABLE_HH
michael@0: #define HB_OT_HHEA_TABLE_HH
michael@0: 
michael@0: #include "hb-open-type-private.hh"
michael@0: 
michael@0: 
michael@0: namespace OT {
michael@0: 
michael@0: 
michael@0: /*
michael@0:  * hhea -- The Horizontal Header Table
michael@0:  */
michael@0: 
michael@0: #define HB_OT_TAG_hhea HB_TAG('h','h','e','a')
michael@0: 
michael@0: 
michael@0: struct hhea
michael@0: {
michael@0:   static const hb_tag_t tableTag	= HB_OT_TAG_hhea;
michael@0: 
michael@0:   inline bool sanitize (hb_sanitize_context_t *c) {
michael@0:     TRACE_SANITIZE (this);
michael@0:     return TRACE_RETURN (c->check_struct (this) && likely (version.major == 1));
michael@0:   }
michael@0: 
michael@0:   protected:
michael@0:   FixedVersion	version;		/* 0x00010000 for version 1.0. */
michael@0:   FWORD		ascender;		/* Typographic ascent. <a
michael@0: 					 * href="http://developer.apple.com/fonts/TTRefMan/RM06/Chap6hhea.html">
michael@0: 					 * (Distance from baseline of highest
michael@0: 					 * ascender)</a> */
michael@0:   FWORD		descender;		/* Typographic descent. <a
michael@0: 					 * href="http://developer.apple.com/fonts/TTRefMan/RM06/Chap6hhea.html">
michael@0: 					 * (Distance from baseline of lowest
michael@0: 					 * descender)</a> */
michael@0:   FWORD		lineGap;		/* Typographic line gap. Negative
michael@0: 					 * LineGap values are treated as zero
michael@0: 					 * in Windows 3.1, System 6, and
michael@0: 					 * System 7. */
michael@0:   UFWORD	advanceWidthMax;	/* Maximum advance width value in
michael@0: 					 * 'hmtx' table. */
michael@0:   FWORD		minLeftSideBearing;	/* Minimum left sidebearing value in
michael@0: 					 * 'hmtx' table. */
michael@0:   FWORD		minRightSideBearing;	/* Minimum right sidebearing value;
michael@0: 					 * calculated as Min(aw - lsb -
michael@0: 					 * (xMax - xMin)). */
michael@0:   FWORD		xMaxExtent;		/* Max(lsb + (xMax - xMin)). */
michael@0:   SHORT		caretSlopeRise;		/* Used to calculate the slope of the
michael@0: 					 * cursor (rise/run); 1 for vertical. */
michael@0:   SHORT		caretSlopeRun;		/* 0 for vertical. */
michael@0:   SHORT		caretOffset;		/* The amount by which a slanted
michael@0: 					 * highlight on a glyph needs
michael@0: 					 * to be shifted to produce the
michael@0: 					 * best appearance. Set to 0 for
michael@0: 					 * non--slanted fonts */
michael@0:   SHORT		reserved1;		/* set to 0 */
michael@0:   SHORT		reserved2;		/* set to 0 */
michael@0:   SHORT		reserved3;		/* set to 0 */
michael@0:   SHORT		reserved4;		/* set to 0 */
michael@0:   SHORT		metricDataFormat;	/* 0 for current format. */
michael@0:   USHORT	numberOfHMetrics;	/* Number of hMetric entries in 'hmtx'
michael@0: 					 * table */
michael@0:   public:
michael@0:   DEFINE_SIZE_STATIC (36);
michael@0: };
michael@0: 
michael@0: 
michael@0: } /* namespace OT */
michael@0: 
michael@0: 
michael@0: #endif /* HB_OT_HHEA_TABLE_HH */