src/hb-aat-layout.hh

   1 /*
   2  * Copyright © 2017  Google, Inc.
   3  *
   4  *  This is part of HarfBuzz, a text shaping library.
   5  *
   6  * Permission is hereby granted, without written agreement and without
   7  * license or royalty fees, to use, copy, modify, and distribute this
   8  * software and its documentation for any purpose, provided that the
   9  * above copyright notice and the following two paragraphs appear in
  10  * all copies of this software.
  11  *
  12  * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
  13  * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
  14  * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
  15  * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
  16  * DAMAGE.
  17  *
  18  * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
  19  * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
  20  * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
  21  * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
  22  * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
  23  *
  24  * Google Author(s): Behdad Esfahbod
  25  */
  26
  27 #ifndef HB_AAT_LAYOUT_HH
  28 #define HB_AAT_LAYOUT_HH
  29
  30 #include "hb.hh"
  31
  32 #include "hb-ot-shape.hh"
  33
  34
  35 struct hb_aat_feature_mapping_t
  36 {
  37   hb_tag_t otFeatureTag;
  38   hb_aat_layout_feature_type_t aatFeatureType;
  39   hb_aat_layout_feature_selector_t selectorToEnable;
  40   hb_aat_layout_feature_selector_t selectorToDisable;
  41
  42   static int cmp (const void *key_, const void *entry_)
  43   {
  44     hb_tag_t key = * (unsigned int *) key_;
  45     const hb_aat_feature_mapping_t * entry = (const hb_aat_feature_mapping_t *) entry_;
  46     return key < entry->otFeatureTag ? -1 :
  47            key > entry->otFeatureTag ? 1 :
  48            0;
  49   }
  50 };
  51
  52 HB_INTERNAL const hb_aat_feature_mapping_t *
  53 hb_aat_layout_find_feature_mapping (hb_tag_t tag);
  54
  55 HB_INTERNAL void
  56 hb_aat_layout_compile_map (const hb_aat_map_builder_t *mapper,
  57                            hb_aat_map_t *map);
  58
  59 HB_INTERNAL void
  60 hb_aat_layout_substitute (const hb_ot_shape_plan_t *plan,
  61                           hb_font_t *font,
  62                           hb_buffer_t *buffer);
  63
  64 HB_INTERNAL void
  65 hb_aat_layout_zero_width_deleted_glyphs (hb_buffer_t *buffer);
  66
  67 HB_INTERNAL void
  68 hb_aat_layout_remove_deleted_glyphs (hb_buffer_t *buffer);
  69
  70 HB_INTERNAL void
  71 hb_aat_layout_position (const hb_ot_shape_plan_t *plan,
  72                         hb_font_t *font,
  73                         hb_buffer_t *buffer);
  74
  75 HB_INTERNAL void
  76 hb_aat_layout_track (const hb_ot_shape_plan_t *plan,
  77                      hb_font_t *font,
  78                      hb_buffer_t *buffer);
  79
  80 HB_INTERNAL hb_language_t
  81 _hb_aat_language_get (hb_face_t *face,
  82                       unsigned int i);
  83
  84
  85 #endif /* HB_AAT_LAYOUT_HH */