hb-ot-shape-private.hh revision b9452bfc1696457e156e79037c863903da5454fc 
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-shape.h"
33
34#include "hb-ot-map-private.hh"
35
36HB_BEGIN_DECLS
37
38
39/* buffer var allocations */
40#define general_category() var1.u8[0] /* unicode general_category (hb_unicode_general_category_t) */
41#define combining_class() var1.u8[1] /* unicode combining_class (uint8_t) */
42
43
44enum hb_ot_complex_shaper_t {
45  hb_ot_complex_shaper_none,
46  hb_ot_complex_shaper_arabic,
47  hb_ot_complex_shaper_indic
48};
49
50
51struct hb_ot_shape_plan_t
52{
53  friend struct hb_ot_shape_planner_t;
54
55  hb_ot_map_t map;
56  hb_ot_complex_shaper_t shaper;
57
58  hb_ot_shape_plan_t (void) : map () {}
59  ~hb_ot_shape_plan_t (void) { map.finish (); }
60
61  private:
62  NO_COPY (hb_ot_shape_plan_t);
63};
64
65struct hb_ot_shape_planner_t
66{
67  hb_ot_map_builder_t map;
68  hb_ot_complex_shaper_t shaper;
69
70  hb_ot_shape_planner_t (void) : map () {}
71  ~hb_ot_shape_planner_t (void) { map.finish (); }
72
73  inline void compile (hb_face_t *face,
74		       const hb_segment_properties_t *props,
75		       struct hb_ot_shape_plan_t &plan)
76  {
77    plan.shaper = shaper;
78    map.compile (face, props, plan.map);
79  }
80
81  private:
82  NO_COPY (hb_ot_shape_planner_t);
83};
84
85
86struct hb_ot_shape_context_t
87{
88  /* Input to hb_ot_shape_execute() */
89  hb_ot_shape_plan_t *plan;
90  hb_font_t *font;
91  hb_face_t *face;
92  hb_buffer_t  *buffer;
93  const hb_feature_t *user_features;
94  unsigned int        num_user_features;
95
96  /* Transient stuff */
97  hb_direction_t target_direction;
98  hb_bool_t applied_substitute_complex;
99  hb_bool_t applied_position_complex;
100};
101
102
103HB_END_DECLS
104
105#endif /* HB_OT_SHAPE_PRIVATE_HH */
106