1 /*
   2  * Copyright © 2018  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  */
  26 
  27 #include "hb.hh"
  28 
  29 #include "hb-open-type.hh"
  30 #include "hb-face.hh"
  31 
  32 #include "hb-aat-layout-common.hh"
  33 #include "hb-aat-layout-feat-table.hh"
  34 #include "hb-ot-layout-common.hh"
  35 #include "hb-ot-cmap-table.hh"
  36 #include "hb-ot-head-table.hh"
  37 #include "hb-ot-maxp-table.hh"
  38 
  39 #ifndef HB_NO_VISIBILITY
  40 
  41 hb_vector_size_impl_t const _hb_NullPool[(HB_NULL_POOL_SIZE + sizeof (hb_vector_size_impl_t) - 1) / sizeof (hb_vector_size_impl_t)] = {};
  42 /*thread_local*/ hb_vector_size_impl_t _hb_CrapPool[(HB_NULL_POOL_SIZE + sizeof (hb_vector_size_impl_t) - 1) / sizeof (hb_vector_size_impl_t)] = {};
  43 
  44 DEFINE_NULL_NAMESPACE_BYTES (OT, Index) =  {0xFF,0xFF};
  45 DEFINE_NULL_NAMESPACE_BYTES (OT, LangSys) = {0x00,0x00, 0xFF,0xFF, 0x00,0x00};
  46 DEFINE_NULL_NAMESPACE_BYTES (OT, RangeRecord) = {0x00,0x01, 0x00,0x00, 0x00, 0x00};
  47 DEFINE_NULL_NAMESPACE_BYTES (OT, CmapSubtableLongGroup) = {0x00,0x00,0x00,0x01, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00};
  48 DEFINE_NULL_NAMESPACE_BYTES (AAT, SettingName) = {0xFF,0xFF, 0xFF,0xFF};
  49 /* Hand-coded because Lookup is a template.  Sad. */
  50 const unsigned char _hb_Null_AAT_Lookup[2] = {0xFF, 0xFF};
  51 
  52 
  53 unsigned int
  54 hb_face_t::load_num_glyphs () const
  55 {
  56   hb_sanitize_context_t c = hb_sanitize_context_t ();
  57   c.set_num_glyphs (0); /* So we don't recurse ad infinitum. */
  58   hb_blob_t *maxp_blob = c.reference_table<OT::maxp> (this);
  59   const OT::maxp *maxp_table = maxp_blob->as<OT::maxp> ();
  60 
  61   unsigned int ret = maxp_table->get_num_glyphs ();
  62   num_glyphs.set_relaxed (ret);
  63   hb_blob_destroy (maxp_blob);
  64   return ret;
  65 }
  66 
  67 unsigned int
  68 hb_face_t::load_upem () const
  69 {
  70   unsigned int ret = table.head->get_upem ();
  71   upem.set_relaxed (ret);
  72   return ret;
  73 }
  74 
  75 #endif