src/hb-ot-post-table.hh

/*
 * Copyright © 2016  Google, Inc.
 *
 *  This is part of HarfBuzz, a text shaping library.
 *
 * Permission is hereby granted, without written agreement and without
 * license or royalty fees, to use, copy, modify, and distribute this
 * software and its documentation for any purpose, provided that the
 * above copyright notice and the following two paragraphs appear in
 * all copies of this software.
 *
 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 *
 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
 *
 * Google Author(s): Behdad Esfahbod
 */

#ifndef HB_OT_POST_TABLE_HH
#define HB_OT_POST_TABLE_HH

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


namespace OT {


/*
 * post -- PostScript
 */

#define HB_OT_TAG_post HB_TAG('p','o','s','t')


struct postV2Tail
{
  inline bool sanitize (hb_sanitize_context_t *c) const
  {
    TRACE_SANITIZE (this);
    return_trace (numberOfGlyphs.sanitize (c) &&
		  c->check_array (glyphNameIndex, sizeof (USHORT), numberOfGlyphs));
  }

  USHORT	numberOfGlyphs;		/* Number of glyphs (this should be the
					 * same as numGlyphs in 'maxp' table). */
  USHORT	glyphNameIndex[VAR];	/* This is not an offset, but is the
					 * ordinal number of the glyph in 'post'
					 * string tables. */
  BYTE		namesX[VAR];		/* Glyph names with length bytes [variable]
					 * (a Pascal string). */

  DEFINE_SIZE_ARRAY2 (2, glyphNameIndex, namesX);
};

struct post
{
  static const hb_tag_t tableTag = HB_OT_TAG_post;

  inline bool sanitize (hb_sanitize_context_t *c) const
  {
    TRACE_SANITIZE (this);
    if (unlikely (!c->check_struct (this)))
      return_trace (false);
    if (version.to_int () == 0x00020000)
    {
      const postV2Tail &v2 = StructAfter<postV2Tail>(*this);
      return_trace (v2.sanitize (c));
    }
    return_trace (true);
  }

  public:
  FixedVersion<>version;		/* 0x00010000 for version 1.0
					 * 0x00020000 for version 2.0
					 * 0x00025000 for version 2.5 (deprecated)
					 * 0x00030000 for version 3.0 */
  Fixed		italicAngle;		/* Italic angle in counter-clockwise degrees
					 * from the vertical. Zero for upright text,
					 * negative for text that leans to the right
					 * (forward). */
  FWORD		underlinePosition;	/* This is the suggested distance of the top
					 * of the underline from the baseline
					 * (negative values indicate below baseline).
					 * The PostScript definition of this FontInfo
					 * dictionary key (the y coordinate of the
					 * center of the stroke) is not used for
					 * historical reasons. The value of the
					 * PostScript key may be calculated by
					 * subtracting half the underlineThickness
					 * from the value of this field. */
  FWORD		underlineThickness;	/* Suggested values for the underline
					   thickness. */
  ULONG		isFixedPitch;		/* Set to 0 if the font is proportionally
					 * spaced, non-zero if the font is not
					 * proportionally spaced (i.e. monospaced). */
  ULONG		minMemType42;		/* Minimum memory usage when an OpenType font
					 * is downloaded. */
  ULONG		maxMemType42;		/* Maximum memory usage when an OpenType font
					 * is downloaded. */
  ULONG		minMemType1;		/* Minimum memory usage when an OpenType font
					 * is downloaded as a Type 1 font. */
  ULONG		maxMemType1;		/* Maximum memory usage when an OpenType font
					 * is downloaded as a Type 1 font. */
/*postV2Tail	v2[VAR];*/
  DEFINE_SIZE_STATIC (32);
};

} /* namespace OT */


#endif /* HB_OT_POST_TABLE_HH */