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

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• Hash : 385f78b3
  Author :
  Date : 2018-11-07T17:19:21
  

  [aat] Remove deleted-glyhs after applying kerx/kern
  
  Finally:  Fixes https://github.com/harfbuzz/harfbuzz/issues/1356
  
  Test case:
  $ ./hb-shape GeezaPro.ttc -u U+0628,U+064A,U+064E,U+0651,U+0629
  [u0629.final.tehMarbuta=4+713|u064e_u0651.shaddaFatha=1@0,-200+0|u064a.medial.yeh=1+656|u0628.initial.beh=0+656]
  
  The mark positioning (kern table CrossStream kerning) only works if deleted
  glyph (as result of ligation) is still in stream and pushed through the
  state machine.
  

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• src/hb-aat-layout.hh

• /*
   * Copyright © 2017  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_LAYOUT_HH
  #define HB_AAT_LAYOUT_HH
  
  #include "hb.hh"
  
  #include "hb-ot-shape.hh"
  
  
  struct hb_aat_feature_mapping_t
  {
    hb_tag_t otFeatureTag;
    uint16_t aatFeatureType;
    uint16_t selectorToEnable;
    uint16_t selectorToDisable;
  
    static inline int cmp (const void *key_, const void *entry_)
    {
      hb_tag_t key = * (unsigned int *) key_;
      const hb_aat_feature_mapping_t * entry = (const hb_aat_feature_mapping_t *) entry_;
      return key < entry->otFeatureTag ? -1 :
  	   key > entry->otFeatureTag ? 1 :
  	   0;
    }
  };
  
  HB_INTERNAL const hb_aat_feature_mapping_t *
  hb_aat_layout_find_feature_mapping (hb_tag_t tag);
  
  HB_INTERNAL void
  hb_aat_layout_compile_map (const hb_aat_map_builder_t *mapper,
  			   hb_aat_map_t *map);
  
  HB_INTERNAL bool
  hb_aat_layout_has_substitution (hb_face_t *face);
  
  HB_INTERNAL void
  hb_aat_layout_substitute (hb_ot_shape_plan_t *plan,
  			  hb_font_t *font,
  			  hb_buffer_t *buffer);
  
  HB_INTERNAL void
  hb_aat_layout_zero_width_deleted_glyphs (hb_buffer_t *buffer);
  
  HB_INTERNAL void
  hb_aat_layout_remove_deleted_glyphs (hb_buffer_t *buffer);
  
  HB_INTERNAL bool
  hb_aat_layout_has_positioning (hb_face_t *face);
  
  HB_INTERNAL void
  hb_aat_layout_position (hb_ot_shape_plan_t *plan,
  			hb_font_t *font,
  			hb_buffer_t *buffer);
  
  HB_INTERNAL bool
  hb_aat_layout_has_tracking (hb_face_t *face);
  
  HB_INTERNAL void
  hb_aat_layout_track (hb_ot_shape_plan_t *plan,
  		     hb_font_t *font,
  		     hb_buffer_t *buffer);
  
  HB_INTERNAL hb_language_t
  _hb_aat_language_get (hb_face_t *face,
  		      unsigned int i);
  
  
  #endif /* HB_AAT_LAYOUT_HH */
  

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