kc3-lang/harfbuzz/src/hb-aat-map.hh

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• Hash : 2dda6dd7
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  Date : 2020-04-20T14:12:45
  

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• src/hb-aat-map.hh

• /*
   * 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
   */
  
  #ifndef HB_AAT_MAP_HH
  #define HB_AAT_MAP_HH
  
  #include "hb.hh"
  
  
  struct hb_aat_map_t
  {
    friend struct hb_aat_map_builder_t;
  
    public:
  
    void init ()
    {
      memset (this, 0, sizeof (*this));
      chain_flags.init ();
    }
    void fini () { chain_flags.fini (); }
  
    public:
    hb_vector_t<hb_mask_t> chain_flags;
  };
  
  struct hb_aat_map_builder_t
  {
    public:
  
    HB_INTERNAL hb_aat_map_builder_t (hb_face_t *face_,
  				    const hb_segment_properties_t *props_ HB_UNUSED) :
  				      face (face_) {}
  
    HB_INTERNAL void add_feature (hb_tag_t tag, unsigned int value=1);
  
    HB_INTERNAL void compile (hb_aat_map_t  &m);
  
    public:
    struct feature_info_t
    {
      hb_aat_layout_feature_type_t  type;
      hb_aat_layout_feature_selector_t  setting;
      bool is_exclusive;
      unsigned  seq; /* For stable sorting only. */
  
      HB_INTERNAL static int cmp (const void *pa, const void *pb)
      {
        const feature_info_t *a = (const feature_info_t *) pa;
        const feature_info_t *b = (const feature_info_t *) pb;
        if (a->type != b->type) return (a->type < b->type ? -1 : 1);
        if (!a->is_exclusive &&
  	  (a->setting & ~1) != (b->setting & ~1)) return (a->setting < b->setting ? -1 : 1);
  	    return (a->seq < b->seq ? -1 : a->seq > b->seq ? 1 : 0);
      }
  
      /* compares type & setting only, not is_exclusive flag or seq number */
      int cmp (const feature_info_t& f) const
      {
        return (f.type != type) ? (f.type < type ? -1 : 1) :
  	     (f.setting != setting) ? (f.setting < setting ? -1 : 1) : 0;
      }
    };
  
    public:
    hb_face_t *face;
  
    public:
    hb_sorted_vector_t<feature_info_t> features;
  };
  
  
  #endif /* HB_AAT_MAP_HH */
  

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