harfbuzz/src/hb-ot-layout-gdef-table.hh

/*
 * Copyright © 2007,2008,2009  Red Hat, Inc.
 * Copyright © 2010,2011,2012  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.
 *
 * Red Hat Author(s): Behdad Esfahbod
 * Google Author(s): Behdad Esfahbod
 */

#ifndef HB_OT_LAYOUT_GDEF_TABLE_HH
#define HB_OT_LAYOUT_GDEF_TABLE_HH

#include "hb-ot-layout-common.hh"

#include "hb-font.hh"


namespace OT {


/*
 * Attachment List Table
 */

typedef ArrayOf<HBUINT16> AttachPoint;	/* Array of contour point indices--in
					 * increasing numerical order */

struct AttachList
{
  inline unsigned int get_attach_points (hb_codepoint_t glyph_id,
					 unsigned int start_offset,
					 unsigned int *point_count /* IN/OUT */,
					 unsigned int *point_array /* OUT */) const
  {
    unsigned int index = (this+coverage).get_coverage (glyph_id);
    if (index == NOT_COVERED)
    {
      if (point_count)
	*point_count = 0;
      return 0;
    }

    const AttachPoint &points = this+attachPoint[index];

    if (point_count) {
      const HBUINT16 *array = points.sub_array (start_offset, point_count);
      unsigned int count = *point_count;
      for (unsigned int i = 0; i < count; i++)
	point_array[i] = array[i];
    }

    return points.len;
  }

  inline bool sanitize (hb_sanitize_context_t *c) const
  {
    TRACE_SANITIZE (this);
    return_trace (coverage.sanitize (c, this) && attachPoint.sanitize (c, this));
  }

  protected:
  OffsetTo<Coverage>
		coverage;		/* Offset to Coverage table -- from
					 * beginning of AttachList table */
  OffsetArrayOf<AttachPoint>
		attachPoint;		/* Array of AttachPoint tables
					 * in Coverage Index order */
  public:
  DEFINE_SIZE_ARRAY (4, attachPoint);
};

/*
 * Ligature Caret Table
 */

struct CaretValueFormat1
{
  friend struct CaretValue;

  private:
  inline hb_position_t get_caret_value (hb_font_t *font, hb_direction_t direction) const
  {
    return HB_DIRECTION_IS_HORIZONTAL (direction) ? font->em_scale_x (coordinate) : font->em_scale_y (coordinate);
  }

  inline bool sanitize (hb_sanitize_context_t *c) const
  {
    TRACE_SANITIZE (this);
    return_trace (c->check_struct (this));
  }

  protected:
  HBUINT16	caretValueFormat;	/* Format identifier--format = 1 */
  FWORD		coordinate;		/* X or Y value, in design units */
  public:
  DEFINE_SIZE_STATIC (4);
};

struct CaretValueFormat2
{
  friend struct CaretValue;

  private:
  inline hb_position_t get_caret_value (hb_font_t *font, hb_direction_t direction, hb_codepoint_t glyph_id) const
  {
    hb_position_t x, y;
    if (font->get_glyph_contour_point_for_origin (glyph_id, caretValuePoint, direction, &x, &y))
      return HB_DIRECTION_IS_HORIZONTAL (direction) ? x : y;
    else
      return 0;
  }

  inline bool sanitize (hb_sanitize_context_t *c) const
  {
    TRACE_SANITIZE (this);
    return_trace (c->check_struct (this));
  }

  protected:
  HBUINT16	caretValueFormat;	/* Format identifier--format = 2 */
  HBUINT16	caretValuePoint;	/* Contour point index on glyph */
  public:
  DEFINE_SIZE_STATIC (4);
};

struct CaretValueFormat3
{
  friend struct CaretValue;

  inline hb_position_t get_caret_value (hb_font_t *font, hb_direction_t direction, const VariationStore &var_store) const
  {
    return HB_DIRECTION_IS_HORIZONTAL (direction) ?
           font->em_scale_x (coordinate) + (this+deviceTable).get_x_delta (font, var_store) :
           font->em_scale_y (coordinate) + (this+deviceTable).get_y_delta (font, var_store);
  }

  inline bool sanitize (hb_sanitize_context_t *c) const
  {
    TRACE_SANITIZE (this);
    return_trace (c->check_struct (this) && deviceTable.sanitize (c, this));
  }

  protected:
  HBUINT16	caretValueFormat;	/* Format identifier--format = 3 */
  FWORD		coordinate;		/* X or Y value, in design units */
  OffsetTo<Device>
		deviceTable;		/* Offset to Device table for X or Y
					 * value--from beginning of CaretValue
					 * table */
  public:
  DEFINE_SIZE_STATIC (6);
};

struct CaretValue
{
  inline hb_position_t get_caret_value (hb_font_t *font,
					hb_direction_t direction,
					hb_codepoint_t glyph_id,
					const VariationStore &var_store) const
  {
    switch (u.format) {
    case 1: return u.format1.get_caret_value (font, direction);
    case 2: return u.format2.get_caret_value (font, direction, glyph_id);
    case 3: return u.format3.get_caret_value (font, direction, var_store);
    default:return 0;
    }
  }

  inline bool sanitize (hb_sanitize_context_t *c) const
  {
    TRACE_SANITIZE (this);
    if (!u.format.sanitize (c)) return_trace (false);
    switch (u.format) {
    case 1: return_trace (u.format1.sanitize (c));
    case 2: return_trace (u.format2.sanitize (c));
    case 3: return_trace (u.format3.sanitize (c));
    default:return_trace (true);
    }
  }

  protected:
  union {
  HBUINT16		format;		/* Format identifier */
  CaretValueFormat1	format1;
  CaretValueFormat2	format2;
  CaretValueFormat3	format3;
  } u;
  public:
  DEFINE_SIZE_UNION (2, format);
};

struct LigGlyph
{
  inline unsigned int get_lig_carets (hb_font_t *font,
				      hb_direction_t direction,
				      hb_codepoint_t glyph_id,
				      const VariationStore &var_store,
				      unsigned int start_offset,
				      unsigned int *caret_count /* IN/OUT */,
				      hb_position_t *caret_array /* OUT */) const
  {
    if (caret_count) {
      const OffsetTo<CaretValue> *array = carets.sub_array (start_offset, caret_count);
      unsigned int count = *caret_count;
      for (unsigned int i = 0; i < count; i++)
	caret_array[i] = (this+array[i]).get_caret_value (font, direction, glyph_id, var_store);
    }

    return carets.len;
  }

  inline bool sanitize (hb_sanitize_context_t *c) const
  {
    TRACE_SANITIZE (this);
    return_trace (carets.sanitize (c, this));
  }

  protected:
  OffsetArrayOf<CaretValue>
		carets;			/* Offset array of CaretValue tables
					 * --from beginning of LigGlyph table
					 * --in increasing coordinate order */
  public:
  DEFINE_SIZE_ARRAY (2, carets);
};

struct LigCaretList
{
  inline unsigned int get_lig_carets (hb_font_t *font,
				      hb_direction_t direction,
				      hb_codepoint_t glyph_id,
				      const VariationStore &var_store,
				      unsigned int start_offset,
				      unsigned int *caret_count /* IN/OUT */,
				      hb_position_t *caret_array /* OUT */) const
  {
    unsigned int index = (this+coverage).get_coverage (glyph_id);
    if (index == NOT_COVERED)
    {
      if (caret_count)
	*caret_count = 0;
      return 0;
    }
    const LigGlyph &lig_glyph = this+ligGlyph[index];
    return lig_glyph.get_lig_carets (font, direction, glyph_id, var_store, start_offset, caret_count, caret_array);
  }

  inline bool sanitize (hb_sanitize_context_t *c) const
  {
    TRACE_SANITIZE (this);
    return_trace (coverage.sanitize (c, this) && ligGlyph.sanitize (c, this));
  }

  protected:
  OffsetTo<Coverage>
		coverage;		/* Offset to Coverage table--from
					 * beginning of LigCaretList table */
  OffsetArrayOf<LigGlyph>
		ligGlyph;		/* Array of LigGlyph tables
					 * in Coverage Index order */
  public:
  DEFINE_SIZE_ARRAY (4, ligGlyph);
};


struct MarkGlyphSetsFormat1
{
  inline bool covers (unsigned int set_index, hb_codepoint_t glyph_id) const
  { return (this+coverage[set_index]).get_coverage (glyph_id) != NOT_COVERED; }

  inline bool sanitize (hb_sanitize_context_t *c) const
  {
    TRACE_SANITIZE (this);
    return_trace (coverage.sanitize (c, this));
  }

  protected:
  HBUINT16	format;			/* Format identifier--format = 1 */
  ArrayOf<LOffsetTo<Coverage> >
		coverage;		/* Array of long offsets to mark set
					 * coverage tables */
  public:
  DEFINE_SIZE_ARRAY (4, coverage);
};

struct MarkGlyphSets
{
  inline bool covers (unsigned int set_index, hb_codepoint_t glyph_id) const
  {
    switch (u.format) {
    case 1: return u.format1.covers (set_index, glyph_id);
    default:return false;
    }
  }

  inline bool sanitize (hb_sanitize_context_t *c) const
  {
    TRACE_SANITIZE (this);
    if (!u.format.sanitize (c)) return_trace (false);
    switch (u.format) {
    case 1: return_trace (u.format1.sanitize (c));
    default:return_trace (true);
    }
  }

  protected:
  union {
  HBUINT16		format;		/* Format identifier */
  MarkGlyphSetsFormat1	format1;
  } u;
  public:
  DEFINE_SIZE_UNION (2, format);
};


/*
 * GDEF -- Glyph Definition
 * https://docs.microsoft.com/en-us/typography/opentype/spec/gdef
 */

static bool
_hb_ot_blacklist_gdef (unsigned int gdef_len,
		       unsigned int gsub_len,
		       unsigned int gpos_len)
{
  /* The ugly business of blacklisting individual fonts' tables happen here!
   * See this thread for why we finally had to bend in and do this:
   * https://lists.freedesktop.org/archives/harfbuzz/2016-February/005489.html
   *
   * In certain versions of Times New Roman Italic and Bold Italic,
   * ASCII double quotation mark U+0022 has wrong glyph class 3 (mark)
   * in GDEF.  Many versions of Tahoma have bad GDEF tables that
   * incorrectly classify some spacing marks such as certain IPA
   * symbols as glyph class 3. So do older versions of Microsoft
   * Himalaya, and the version of Cantarell shipped by Ubuntu 16.04.
   *
   * Nuke the GDEF tables of to avoid unwanted width-zeroing.
   *
   * See https://bugzilla.mozilla.org/show_bug.cgi?id=1279925
   *     https://bugzilla.mozilla.org/show_bug.cgi?id=1279693
   *     https://bugzilla.mozilla.org/show_bug.cgi?id=1279875
   */
#define ENCODE(x,y,z) ((int64_t) (x) << 32 | (int64_t) (y) << 16 | (z))
  switch ENCODE(gdef_len, gsub_len, gpos_len)
  {
    /* sha1sum:c5ee92f0bca4bfb7d06c4d03e8cf9f9cf75d2e8a Windows 7? timesi.ttf */
    case ENCODE (442, 2874, 42038):
    /* sha1sum:37fc8c16a0894ab7b749e35579856c73c840867b Windows 7? timesbi.ttf */
    case ENCODE (430, 2874, 40662):
    /* sha1sum:19fc45110ea6cd3cdd0a5faca256a3797a069a80 Windows 7 timesi.ttf */
    case ENCODE (442, 2874, 39116):
    /* sha1sum:6d2d3c9ed5b7de87bc84eae0df95ee5232ecde26 Windows 7 timesbi.ttf */
    case ENCODE (430, 2874, 39374):
    /* sha1sum:8583225a8b49667c077b3525333f84af08c6bcd8 OS X 10.11.3 Times New Roman Italic.ttf */
    case ENCODE (490, 3046, 41638):
    /* sha1sum:ec0f5a8751845355b7c3271d11f9918a966cb8c9 OS X 10.11.3 Times New Roman Bold Italic.ttf */
    case ENCODE (478, 3046, 41902):
    /* sha1sum:96eda93f7d33e79962451c6c39a6b51ee893ce8c  tahoma.ttf from Windows 8 */
    case ENCODE (898, 12554, 46470):
    /* sha1sum:20928dc06014e0cd120b6fc942d0c3b1a46ac2bc  tahomabd.ttf from Windows 8 */
    case ENCODE (910, 12566, 47732):
    /* sha1sum:4f95b7e4878f60fa3a39ca269618dfde9721a79e  tahoma.ttf from Windows 8.1 */
    case ENCODE (928, 23298, 59332):
    /* sha1sum:6d400781948517c3c0441ba42acb309584b73033  tahomabd.ttf from Windows 8.1 */
    case ENCODE (940, 23310, 60732):
    /* tahoma.ttf v6.04 from Windows 8.1 x64, see https://bugzilla.mozilla.org/show_bug.cgi?id=1279925 */
    case ENCODE (964, 23836, 60072):
    /* tahomabd.ttf v6.04 from Windows 8.1 x64, see https://bugzilla.mozilla.org/show_bug.cgi?id=1279925 */
    case ENCODE (976, 23832, 61456):
    /* sha1sum:e55fa2dfe957a9f7ec26be516a0e30b0c925f846  tahoma.ttf from Windows 10 */
    case ENCODE (994, 24474, 60336):
    /* sha1sum:7199385abb4c2cc81c83a151a7599b6368e92343  tahomabd.ttf from Windows 10 */
    case ENCODE (1006, 24470, 61740):
    /* tahoma.ttf v6.91 from Windows 10 x64, see https://bugzilla.mozilla.org/show_bug.cgi?id=1279925 */
    case ENCODE (1006, 24576, 61346):
    /* tahomabd.ttf v6.91 from Windows 10 x64, see https://bugzilla.mozilla.org/show_bug.cgi?id=1279925 */
    case ENCODE (1018, 24572, 62828):
    /* sha1sum:b9c84d820c49850d3d27ec498be93955b82772b5  tahoma.ttf from Windows 10 AU */
    case ENCODE (1006, 24576, 61352):
    /* sha1sum:2bdfaab28174bdadd2f3d4200a30a7ae31db79d2  tahomabd.ttf from Windows 10 AU */
    case ENCODE (1018, 24572, 62834):
    /* sha1sum:b0d36cf5a2fbe746a3dd277bffc6756a820807a7  Tahoma.ttf from Mac OS X 10.9 */
    case ENCODE (832, 7324, 47162):
    /* sha1sum:12fc4538e84d461771b30c18b5eb6bd434e30fba  Tahoma Bold.ttf from Mac OS X 10.9 */
    case ENCODE (844, 7302, 45474):
    /* sha1sum:eb8afadd28e9cf963e886b23a30b44ab4fd83acc  himalaya.ttf from Windows 7 */
    case ENCODE (180, 13054, 7254):
    /* sha1sum:73da7f025b238a3f737aa1fde22577a6370f77b0  himalaya.ttf from Windows 8 */
    case ENCODE (192, 12638, 7254):
    /* sha1sum:6e80fd1c0b059bbee49272401583160dc1e6a427  himalaya.ttf from Windows 8.1 */
    case ENCODE (192, 12690, 7254):
    /* 8d9267aea9cd2c852ecfb9f12a6e834bfaeafe44  cantarell-fonts-0.0.21/otf/Cantarell-Regular.otf */
    /* 983988ff7b47439ab79aeaf9a45bd4a2c5b9d371  cantarell-fonts-0.0.21/otf/Cantarell-Oblique.otf */
    case ENCODE (188, 248, 3852):
    /* 2c0c90c6f6087ffbfea76589c93113a9cbb0e75f  cantarell-fonts-0.0.21/otf/Cantarell-Bold.otf */
    /* 55461f5b853c6da88069ffcdf7f4dd3f8d7e3e6b  cantarell-fonts-0.0.21/otf/Cantarell-Bold-Oblique.otf */
    case ENCODE (188, 264, 3426):
    /* d125afa82a77a6475ac0e74e7c207914af84b37a padauk-2.80/Padauk.ttf RHEL 7.2 */
    case ENCODE (1058, 47032, 11818):
    /* 0f7b80437227b90a577cc078c0216160ae61b031 padauk-2.80/Padauk-Bold.ttf RHEL 7.2*/
    case ENCODE (1046, 47030, 12600):
    /* d3dde9aa0a6b7f8f6a89ef1002e9aaa11b882290 padauk-2.80/Padauk.ttf Ubuntu 16.04 */
    case ENCODE (1058, 71796, 16770):
    /* 5f3c98ccccae8a953be2d122c1b3a77fd805093f padauk-2.80/Padauk-Bold.ttf Ubuntu 16.04 */
    case ENCODE (1046, 71790, 17862):
    /* 6c93b63b64e8b2c93f5e824e78caca555dc887c7 padauk-2.80/Padauk-book.ttf */
    case ENCODE (1046, 71788, 17112):
    /* d89b1664058359b8ec82e35d3531931125991fb9 padauk-2.80/Padauk-bookbold.ttf */
    case ENCODE (1058, 71794, 17514):
    /* 824cfd193aaf6234b2b4dc0cf3c6ef576c0d00ef padauk-3.0/Padauk-book.ttf */
    case ENCODE (1330, 109904, 57938):
    /* 91fcc10cf15e012d27571e075b3b4dfe31754a8a padauk-3.0/Padauk-bookbold.ttf */
    case ENCODE (1330, 109904, 58972):
    /* sha1sum: c26e41d567ed821bed997e937bc0c41435689e85  Padauk.ttf
     *  "Padauk Regular" "Version 2.5", see https://crbug.com/681813 */
    case ENCODE (1004, 59092, 14836):
      return true;
#undef ENCODE
  }
  return false;
}



struct GDEF
{
  static const hb_tag_t tableTag	= HB_OT_TAG_GDEF;

  enum GlyphClasses {
    UnclassifiedGlyph	= 0,
    BaseGlyph		= 1,
    LigatureGlyph	= 2,
    MarkGlyph		= 3,
    ComponentGlyph	= 4
  };

  inline bool has_data (void) const { return version.to_int () != 0; }
  inline bool has_glyph_classes (void) const { return glyphClassDef != 0; }
  inline unsigned int get_glyph_class (hb_codepoint_t glyph) const
  { return (this+glyphClassDef).get_class (glyph); }
  inline void get_glyphs_in_class (unsigned int klass, hb_set_t *glyphs) const
  { (this+glyphClassDef).add_class (glyphs, klass); }

  inline bool has_mark_attachment_types (void) const { return markAttachClassDef != 0; }
  inline unsigned int get_mark_attachment_type (hb_codepoint_t glyph) const
  { return (this+markAttachClassDef).get_class (glyph); }

  inline bool has_attach_points (void) const { return attachList != 0; }
  inline unsigned int get_attach_points (hb_codepoint_t glyph_id,
					 unsigned int start_offset,
					 unsigned int *point_count /* IN/OUT */,
					 unsigned int *point_array /* OUT */) const
  { return (this+attachList).get_attach_points (glyph_id, start_offset, point_count, point_array); }

  inline bool has_lig_carets (void) const { return ligCaretList != 0; }
  inline unsigned int get_lig_carets (hb_font_t *font,
				      hb_direction_t direction,
				      hb_codepoint_t glyph_id,
				      unsigned int start_offset,
				      unsigned int *caret_count /* IN/OUT */,
				      hb_position_t *caret_array /* OUT */) const
  { return (this+ligCaretList).get_lig_carets (font,
					       direction, glyph_id, get_var_store(),
					       start_offset, caret_count, caret_array); }

  inline bool has_mark_sets (void) const { return version.to_int () >= 0x00010002u && markGlyphSetsDef != 0; }
  inline bool mark_set_covers (unsigned int set_index, hb_codepoint_t glyph_id) const
  { return version.to_int () >= 0x00010002u && (this+markGlyphSetsDef).covers (set_index, glyph_id); }

  inline bool has_var_store (void) const { return version.to_int () >= 0x00010003u && varStore != 0; }
  inline const VariationStore &get_var_store (void) const
  { return version.to_int () >= 0x00010003u ? this+varStore : Null(VariationStore); }

  inline bool sanitize (hb_sanitize_context_t *c) const
  {
    TRACE_SANITIZE (this);
    return_trace (version.sanitize (c) &&
		  likely (version.major == 1) &&
		  glyphClassDef.sanitize (c, this) &&
		  attachList.sanitize (c, this) &&
		  ligCaretList.sanitize (c, this) &&
		  markAttachClassDef.sanitize (c, this) &&
		  (version.to_int () < 0x00010002u || markGlyphSetsDef.sanitize (c, this)) &&
		  (version.to_int () < 0x00010003u || varStore.sanitize (c, this)));
  }

  /* glyph_props is a 16-bit integer where the lower 8-bit have bits representing
   * glyph class and other bits, and high 8-bit gthe mark attachment type (if any).
   * Not to be confused with lookup_props which is very similar. */
  inline unsigned int get_glyph_props (hb_codepoint_t glyph) const
  {
    unsigned int klass = get_glyph_class (glyph);

    static_assert (((unsigned int) HB_OT_LAYOUT_GLYPH_PROPS_BASE_GLYPH == (unsigned int) LookupFlag::IgnoreBaseGlyphs), "");
    static_assert (((unsigned int) HB_OT_LAYOUT_GLYPH_PROPS_LIGATURE == (unsigned int) LookupFlag::IgnoreLigatures), "");
    static_assert (((unsigned int) HB_OT_LAYOUT_GLYPH_PROPS_MARK == (unsigned int) LookupFlag::IgnoreMarks), "");

    switch (klass) {
    default:			return 0;
    case BaseGlyph:		return HB_OT_LAYOUT_GLYPH_PROPS_BASE_GLYPH;
    case LigatureGlyph:		return HB_OT_LAYOUT_GLYPH_PROPS_LIGATURE;
    case MarkGlyph:
	  klass = get_mark_attachment_type (glyph);
	  return HB_OT_LAYOUT_GLYPH_PROPS_MARK | (klass << 8);
    }
  }

  struct accelerator_t
  {
    inline void init (hb_face_t *face)
    {
      this->blob = hb_sanitize_context_t().reference_table<GDEF> (face);

      if (unlikely (_hb_ot_blacklist_gdef (this->blob->length,
					   _get_gsub_blob (face)->length,
					   _get_gpos_blob (face)->length)))
      {
	hb_blob_destroy (this->blob);
	this->blob = hb_blob_get_empty ();
      }

      table = this->blob->as<GDEF> ();
    }

    inline void fini (void)
    {
      hb_blob_destroy (this->blob);
    }

    hb_blob_t *blob;
    const GDEF *table;
  };

  protected:
  FixedVersion<>version;		/* Version of the GDEF table--currently
					 * 0x00010003u */
  OffsetTo<ClassDef>
		glyphClassDef;		/* Offset to class definition table
					 * for glyph type--from beginning of
					 * GDEF header (may be Null) */
  OffsetTo<AttachList>
		attachList;		/* Offset to list of glyphs with
					 * attachment points--from beginning
					 * of GDEF header (may be Null) */
  OffsetTo<LigCaretList>
		ligCaretList;		/* Offset to list of positioning points
					 * for ligature carets--from beginning
					 * of GDEF header (may be Null) */
  OffsetTo<ClassDef>
		markAttachClassDef;	/* Offset to class definition table for
					 * mark attachment type--from beginning
					 * of GDEF header (may be Null) */
  OffsetTo<MarkGlyphSets>
		markGlyphSetsDef;	/* Offset to the table of mark set
					 * definitions--from beginning of GDEF
					 * header (may be NULL).  Introduced
					 * in version 0x00010002. */
  LOffsetTo<VariationStore>
		varStore;		/* Offset to the table of Item Variation
					 * Store--from beginning of GDEF
					 * header (may be NULL).  Introduced
					 * in version 0x00010003. */
  public:
  DEFINE_SIZE_MIN (12);
};


} /* namespace OT */


#endif /* HB_OT_LAYOUT_GDEF_TABLE_HH */