1 /*
   2  * Copyright © 2009,2010  Red Hat, Inc.
   3  * Copyright © 2010,2011,2013  Google, Inc.
   4  *
   5  *  This is part of HarfBuzz, a text shaping library.
   6  *
   7  * Permission is hereby granted, without written agreement and without
   8  * license or royalty fees, to use, copy, modify, and distribute this
   9  * software and its documentation for any purpose, provided that the
  10  * above copyright notice and the following two paragraphs appear in
  11  * all copies of this software.
  12  *
  13  * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
  14  * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
  15  * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
  16  * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
  17  * DAMAGE.
  18  *
  19  * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
  20  * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
  21  * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
  22  * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
  23  * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
  24  *
  25  * Red Hat Author(s): Behdad Esfahbod
  26  * Google Author(s): Behdad Esfahbod
  27  */
  28 
  29 #include "hb-aat-map.hh"
  30 
  31 #include "hb-aat-layout.hh"
  32 
  33 
  34 void hb_aat_map_builder_t::add_feature (hb_tag_t tag,
  35                                         unsigned int value)
  36 {
  37   if (tag == HB_TAG ('a','a','l','t'))
  38   {
  39     feature_info_t *info = features.push();
  40     info->type = HB_AAT_LAYOUT_FEATURE_TYPE_CHARACTER_ALTERNATIVES;
  41     info->setting = (hb_aat_layout_feature_selector_t) value;
  42     return;
  43   }
  44 
  45   const hb_aat_feature_mapping_t *mapping = hb_aat_layout_find_feature_mapping (tag);
  46   if (!mapping) return;
  47 
  48   feature_info_t *info = features.push();
  49   info->type = mapping->aatFeatureType;
  50   info->setting = value ? mapping->selectorToEnable : mapping->selectorToDisable;
  51 }
  52 
  53 void
  54 hb_aat_map_builder_t::compile (hb_aat_map_t  &m)
  55 {
  56   /* Sort features and merge duplicates */
  57   if (features.length)
  58   {
  59     features.qsort ();
  60     unsigned int j = 0;
  61     for (unsigned int i = 1; i < features.length; i++)
  62       if (features[i].type != features[j].type)
  63         features[++j] = features[i];
  64     features.shrink (j + 1);
  65   }
  66 
  67   hb_aat_layout_compile_map (this, &m);
  68 }