third_party/harfbuzz-ng/src/hb-ot-shape-private.hh

   1 /*
   2  * Copyright © 2010  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_OT_SHAPE_PRIVATE_HH
  28 #define HB_OT_SHAPE_PRIVATE_HH
  29
  30 #include "hb-private.hh"
  31
  32 #include "hb-ot-map-private.hh"
  33 #include "hb-ot-layout-private.hh"
  34
  35
  36
  37 struct hb_ot_shape_plan_t
  38 {
  39   hb_segment_properties_t props;
  40   const struct hb_ot_complex_shaper_t *shaper;
  41   hb_ot_map_t map;
  42   const void *data;
  43
  44   inline void collect_lookups (hb_tag_t table_tag, hb_set_t *lookups) const
  45   {
  46     unsigned int table_index;
  47     switch (table_tag) {
  48       case HB_OT_TAG_GSUB: table_index = 0; break;
  49       case HB_OT_TAG_GPOS: table_index = 1; break;
  50       default: return;
  51     }
  52     map.collect_lookups (table_index, lookups);
  53   }
  54   inline void substitute (hb_font_t *font, hb_buffer_t *buffer) const { map.substitute (this, font, buffer); }
  55   inline void position (hb_font_t *font, hb_buffer_t *buffer) const { map.position (this, font, buffer); }
  56
  57   void finish (void) { map.finish (); }
  58 };
  59
  60 struct hb_ot_shape_planner_t
  61 {
  62   /* In the order that they are filled in. */
  63   hb_face_t *face;
  64   hb_segment_properties_t props;
  65   const struct hb_ot_complex_shaper_t *shaper;
  66   hb_ot_map_builder_t map;
  67
  68   hb_ot_shape_planner_t (const hb_shape_plan_t *master_plan) :
  69                          face (master_plan->face),
  70                          props (master_plan->props),
  71                          shaper (NULL),
  72                          map (face, &props) {}
  73   ~hb_ot_shape_planner_t (void) { map.finish (); }
  74
  75   inline void compile (hb_ot_shape_plan_t &plan)
  76   {
  77     plan.props = props;
  78     plan.shaper = shaper;
  79     map.compile (plan.map);
  80   }
  81
  82   private:
  83   NO_COPY (hb_ot_shape_planner_t);
  84 };
  85
  86
  87 #endif /* HB_OT_SHAPE_PRIVATE_HH */