kc3-lang/harfbuzz/src/hb-face.hh

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• Author : Behdad Esfahbod
  Date : 2025-03-12 18:27:27
  Hash : 4807a021
  Message : [atomic] Kill hb_atomic_ptr_t<T> Use hb_atomic_t<T *> instead.

• src/hb-face.hh

• /*
   * Copyright © 2009  Red Hat, Inc.
   * Copyright © 2011  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_FACE_HH
  #define HB_FACE_HH
  
  #include "hb.hh"
  
  #include "hb-shaper.hh"
  #include "hb-shape-plan.hh"
  #include "hb-ot-face.hh"
  
  
  /*
   * hb_face_t
   */
  
  #define HB_SHAPER_IMPLEMENT(shaper) HB_SHAPER_DATA_INSTANTIATE_SHAPERS(shaper, face);
  #include "hb-shaper-list.hh"
  #undef HB_SHAPER_IMPLEMENT
  
  struct hb_face_t
  {
    hb_object_header_t header;
  
    unsigned int index;			/* Face index in a collection, zero-based. */
    mutable hb_atomic_t<unsigned> upem;	/* Units-per-EM. */
    mutable hb_atomic_t<unsigned> num_glyphs;/* Number of glyphs. */
  
    hb_reference_table_func_t  reference_table_func;
    void                      *user_data;
    hb_destroy_func_t          destroy;
  
    hb_get_table_tags_func_t   get_table_tags_func;
    void                      *get_table_tags_user_data;
    hb_destroy_func_t          get_table_tags_destroy;
  
    hb_shaper_object_dataset_t<hb_face_t> data;/* Various shaper data. */
    hb_ot_face_t table;			/* All the face's tables. */
  
    /* Cache */
    struct plan_node_t
    {
      hb_shape_plan_t *shape_plan;
      plan_node_t *next;
    };
  #ifndef HB_NO_SHAPER
    hb_atomic_t<plan_node_t *> shape_plans;
  #endif
  
    hb_blob_t *reference_table (hb_tag_t tag) const
    {
      hb_blob_t *blob;
  
      if (unlikely (!reference_table_func))
        return hb_blob_get_empty ();
  
      blob = reference_table_func (/*Oh, well.*/const_cast<hb_face_t *> (this), tag, user_data);
      if (unlikely (!blob))
        return hb_blob_get_empty ();
  
      return blob;
    }
  
    unsigned int get_upem () const
    {
      unsigned int ret = upem;
      if (unlikely (!ret))
      {
        return load_upem ();
      }
      return ret;
    }
  
    unsigned int get_num_glyphs () const
    {
      unsigned int ret = num_glyphs;
      if (unlikely (ret == UINT_MAX))
        return load_num_glyphs ();
      return ret;
    }
  
    private:
    HB_INTERNAL unsigned int load_upem () const;
    HB_INTERNAL unsigned int load_num_glyphs () const;
  };
  DECLARE_NULL_INSTANCE (hb_face_t);
  
  
  #endif /* HB_FACE_HH */