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
37struct 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  hb_mask_t rtlm_mask, frac_mask, numr_mask, dnom_mask;
44  hb_mask_t kern_mask;
45  unsigned int has_frac : 1;
46  unsigned int has_kern : 1;
47  unsigned int has_mark : 1;
48
49  inline void collect_lookups (hb_tag_t table_tag, hb_set_t *lookups) const
50  {
51    unsigned int table_index;
52    switch (table_tag) {
53      case HB_OT_TAG_GSUB: table_index = 0; break;
54      case HB_OT_TAG_GPOS: table_index = 1; break;
55      default: return;
56    }
57    map.collect_lookups (table_index, lookups);
58  }
59  inline void substitute (hb_font_t *font, hb_buffer_t *buffer) const { map.substitute (this, font, buffer); }
60  inline void position (hb_font_t *font, hb_buffer_t *buffer) const { map.position (this, font, buffer); }
61
62  void finish (void) { map.finish (); }
63};
64
65struct hb_ot_shape_planner_t
66{
67  /* In the order that they are filled in. */
68  hb_face_t *face;
69  hb_segment_properties_t props;
70  const struct hb_ot_complex_shaper_t *shaper;
71  hb_ot_map_builder_t map;
72
73  hb_ot_shape_planner_t (const hb_shape_plan_t *master_plan) :
74			 face (master_plan->face_unsafe),
75			 props (master_plan->props),
76			 shaper (NULL),
77			 map (face, &props) {}
78  ~hb_ot_shape_planner_t (void) { map.finish (); }
79
80  inline void compile (hb_ot_shape_plan_t &plan)
81  {
82    plan.props = props;
83    plan.shaper = shaper;
84    map.compile (plan.map);
85
86    plan.rtlm_mask = plan.map.get_1_mask (HB_TAG ('r','t','l','m'));
87    plan.frac_mask = plan.map.get_1_mask (HB_TAG ('f','r','a','c'));
88    plan.numr_mask = plan.map.get_1_mask (HB_TAG ('n','u','m','r'));
89    plan.dnom_mask = plan.map.get_1_mask (HB_TAG ('d','n','o','m'));
90
91    plan.kern_mask = plan.map.get_mask (HB_DIRECTION_IS_HORIZONTAL (plan.props.direction) ?
92					HB_TAG ('k','e','r','n') : HB_TAG ('v','k','r','n'));
93
94    plan.has_frac = plan.frac_mask || (plan.numr_mask && plan.dnom_mask);
95    plan.has_kern = !!plan.kern_mask;
96    plan.has_mark = !!plan.map.get_1_mask (HB_TAG ('m','a','r','k'));
97  }
98
99  private:
100  NO_COPY (hb_ot_shape_planner_t);
101};
102
103
104#endif /* HB_OT_SHAPE_PRIVATE_HH */
105