kc3-lang/harfbuzz/src/hb-static.cc

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• Author : Behdad Esfahbod
  Date : 2023-06-03 22:52:16
  Hash : 054f966a
  Message : [subset/cff1] Don't allocate memory for retaingid holes 40% speedup in BM_subset/subset_glyphs/SourceHanSans-Regular_subset.otf/retaingids/10 benchmark.

• src/hb-static.cc

• /*
   * 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-cff-interp-common.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-hmtx-table.hh"
  #include "hb-ot-maxp-table.hh"
  
  #ifndef HB_NO_VISIBILITY
  #include "hb-ot-name-language-static.hh"
  
  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;
  static const unsigned char static_endchar_str[] = {OpCode_endchar};
  const unsigned char *endchar_str = static_endchar_str;
  
  /* 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;
  }
  
  
  #ifndef HB_NO_VAR
  bool
  _glyf_get_leading_bearing_with_var_unscaled (hb_font_t *font, hb_codepoint_t glyph, bool is_vertical,
  					     int *lsb)
  {
    return font->face->table.glyf->get_leading_bearing_with_var_unscaled (font, glyph, is_vertical, lsb);
  }
  
  unsigned
  _glyf_get_advance_with_var_unscaled (hb_font_t *font, hb_codepoint_t glyph, bool is_vertical)
  {
    return font->face->table.glyf->get_advance_with_var_unscaled (font, glyph, is_vertical);
  }
  #endif
  
  bool
  _glyf_get_leading_bearing_without_var_unscaled (hb_face_t *face, hb_codepoint_t gid, bool is_vertical, int *lsb)
  {
    return face->table.glyf->get_leading_bearing_without_var_unscaled (gid, is_vertical, lsb);
  }
  
  
  #endif