kc3-lang/harfbuzz/src/hb-subset-repacker.cc

• Show log

  Commit

• Hash : 69913e01
  Author :
  Date : 2022-07-29T20:45:56
  

  [repacker] Update repacker api method to take a table tag.
  
  This is needed to allow table specific optimizations to be performed during repacking.
  

Download

• src/hb-subset-repacker.cc

• /*
   * Copyright © 2022  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.
   *
   */
  #include "hb-repacker.hh"
  
  #ifdef HB_EXPERIMENTAL_API
  
  /**
   * hb_subset_repack_or_fail:
   * @table_tag: tag of the table being packed, needed to allow table specific optimizations.
   * @hb_objects: raw array of struct hb_object_t, which provides
   * object graph info
   * @num_hb_objs: number of hb_object_t in the hb_objects array.
   *
   * Given the input object graph info, repack a table to eliminate
   * offset overflows. A nullptr is returned if the repacking attempt fails.
   * Table specific optimizations (eg. extension promotion in GSUB/GPOS) may be performed.
   * Passing HB_TAG_NONE will disable table specific optimizations.
   *
   * Since: EXPERIMENTAL
   **/
  hb_blob_t* hb_subset_repack_or_fail (hb_tag_t table_tag,
                                       hb_object_t* hb_objects,
                                       unsigned num_hb_objs)
  {
    hb_vector_t<const hb_object_t *> packed;
    packed.alloc (num_hb_objs + 1);
    packed.push (nullptr);
    for (unsigned i = 0 ; i < num_hb_objs ; i++)
      packed.push (&(hb_objects[i]));
  
    return hb_resolve_overflows (packed,
                                 table_tag,
                                 20,
                                 true);
  }
  #endif
  

Download