/*

 * Copyright © 2018  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

 */

#include "hb.hh"

#include "hb-open-type.hh"

#include "hb-face.hh"

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

#include "hb-aat-layout-feat-table.hh"

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

#include "hb-ot-cmap-table.hh"

#include "OT/Color/COLR/COLR.hh"

#include "hb-ot-glyf-table.hh"

#include "hb-ot-head-table.hh"

#include "hb-ot-maxp-table.hh"

#ifndef HB_NO_VISIBILITY

uint64_t const _hb_NullPool[(HB_NULL_POOL_SIZE + sizeof (uint64_t) - 1) / sizeof (uint64_t)] = {};

/*thread_local*/ uint64_t _hb_CrapPool[(HB_NULL_POOL_SIZE + sizeof (uint64_t) - 1) / sizeof (uint64_t)] = {};

DEFINE_NULL_NAMESPACE_BYTES (OT, Index) =  {0xFF,0xFF};

DEFINE_NULL_NAMESPACE_BYTES (OT, VarIdx) =  {0xFF,0xFF,0xFF,0xFF};

DEFINE_NULL_NAMESPACE_BYTES (OT, LangSys) = {0x00,0x00, 0xFF,0xFF, 0x00,0x00};

DEFINE_NULL_NAMESPACE_BYTES (OT, RangeRecord) = {0x01};

DEFINE_NULL_NAMESPACE_BYTES (OT, ClipRecord) = {0x01};

DEFINE_NULL_NAMESPACE_BYTES (OT, CmapSubtableLongGroup) = {0x00,0x00,0x00,0x01, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00};

DEFINE_NULL_NAMESPACE_BYTES (AAT, SettingName) = {0xFF,0xFF, 0xFF,0xFF};

DEFINE_NULL_NAMESPACE_BYTES (AAT, Lookup) = {0xFF,0xFF};

/* hb_map_t */

const hb_codepoint_t minus_1 = -1;

/* hb_face_t */

#ifndef HB_NO_BEYOND_64K

static inline unsigned

load_num_glyphs_from_loca (const hb_face_t *face)

{

  unsigned ret = 0;

  unsigned indexToLocFormat = face->table.head->indexToLocFormat;

  if (indexToLocFormat <= 1)

  {

    bool short_offset = 0 == indexToLocFormat;

    hb_blob_t *loca_blob = face->table.loca.get_blob ();

    ret = hb_max (1u, loca_blob->length / (short_offset ? 2 : 4)) - 1;

  }

  return ret;

}

#endif

static inline unsigned

load_num_glyphs_from_maxp (const hb_face_t *face)

{

  return face->table.maxp->get_num_glyphs ();

}

unsigned int

hb_face_t::load_num_glyphs () const

{

  unsigned ret = 0;

#ifndef HB_NO_BEYOND_64K

  ret = hb_max (ret, load_num_glyphs_from_loca (this));

#endif

  ret = hb_max (ret, load_num_glyphs_from_maxp (this));

  num_glyphs = ret;

  return ret;

}

unsigned int

hb_face_t::load_upem () const

{

  unsigned int ret = table.head->get_upem ();

  upem = ret;

  return ret;

}

#endif