kc3-lang/harfbuzz/src/hb-subset-instancer-solver.hh

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• Hash : 22cca43d
  Author :
  Date : 2023-04-20T14:37:29
  

  [instancer ]update internal hashmap to use Triple instead of single value
  
  -Added hb-subset-instancer-solver.hh file and moved Triple struct to the
  head file
  

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• src/hb-subset-instancer-solver.hh

• /*
   * Copyright © 2023  Behdad Esfahbod
   *
   *  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.
   */
  
  #ifndef HB_SUBSET_INSTANCER_SOLVER_HH
  #define HB_SUBSET_INSTANCER_SOLVER_HH
  
  #include "hb.hh"
  
  struct Triple {
  
    Triple () :
      minimum (0.f), middle (0.f), maximum (0.f) {}
  
    Triple (float minimum_, float middle_, float maximum_) :
      minimum (minimum_), middle (middle_), maximum (maximum_) {}
  
    bool operator == (const Triple &o) const
    {
      return minimum == o.minimum &&
  	   middle  == o.middle  &&
  	   maximum == o.maximum;
    }
  
    bool is_point () const
    { return minimum == middle && middle == maximum; }
  
    bool contains (float point) const
    { return minimum <= point && point <= maximum; }
  
    float minimum;
    float middle;
    float maximum;
  };
  
  using result_item_t = hb_pair_t<float, Triple>;
  using result_t = hb_vector_t<result_item_t>;
  
  /* Given a tuple (lower,peak,upper) "tent" and new axis limits
   * (axisMin,axisDefault,axisMax), solves how to represent the tent
   * under the new axis configuration.  All values are in normalized
   * -1,0,+1 coordinate system. Tent values can be outside this range.
   *
   * Return value: a list of tuples. Each tuple is of the form
   * (scalar,tent), where scalar is a multipler to multiply any
   * delta-sets by, and tent is a new tent for that output delta-set.
   * If tent value is Triple{}, that is a special deltaset that should
   * be always-enabled (called "gain").
   */
  HB_INTERNAL result_t rebase_tent (Triple tent, Triple axisLimit);
  
  #endif /* HB_SUBSET_INSTANCER_SOLVER_HH */
  

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