1/*
2 * Copyright © 2009  Red Hat, Inc.
3 * Copyright © 2011  Google, Inc.
4 *
5 *  This is part of HarfBuzz, a text shaping library.
6 *
7 * Permission is hereby granted, without written agreement and without
8 * license or royalty fees, to use, copy, modify, and distribute this
9 * software and its documentation for any purpose, provided that the
10 * above copyright notice and the following two paragraphs appear in
11 * all copies of this software.
12 *
13 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
14 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
15 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
16 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
17 * DAMAGE.
18 *
19 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
20 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
21 * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
22 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
23 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
24 *
25 * Red Hat Author(s): Behdad Esfahbod
26 * Google Author(s): Behdad Esfahbod
27 */
28
29#ifndef HB_FACE_PRIVATE_HH
30#define HB_FACE_PRIVATE_HH
31
32#include "hb-private.hh"
33
34#include "hb-object-private.hh"
35#include "hb-shaper-private.hh"
36#include "hb-shape-plan-private.hh"
37
38
39/*
40 * hb_face_t
41 */
42
43struct hb_face_t {
44  hb_object_header_t header;
45  ASSERT_POD ();
46
47  hb_bool_t immutable;
48
49  hb_reference_table_func_t  reference_table_func;
50  void                      *user_data;
51  hb_destroy_func_t          destroy;
52
53  unsigned int index;
54  mutable unsigned int upem;
55  mutable unsigned int num_glyphs;
56
57  struct hb_shaper_data_t shaper_data;
58
59  struct plan_node_t {
60    hb_shape_plan_t *shape_plan;
61    plan_node_t *next;
62  } *shape_plans;
63
64
65  inline hb_blob_t *reference_table (hb_tag_t tag) const
66  {
67    hb_blob_t *blob;
68
69    if (unlikely (!this || !reference_table_func))
70      return hb_blob_get_empty ();
71
72    blob = reference_table_func (/*XXX*/const_cast<hb_face_t *> (this), tag, user_data);
73    if (unlikely (!blob))
74      return hb_blob_get_empty ();
75
76    return blob;
77  }
78
79  inline HB_PURE_FUNC unsigned int get_upem (void) const
80  {
81    if (unlikely (!upem))
82      load_upem ();
83    return upem;
84  }
85
86  inline unsigned int get_num_glyphs (void) const
87  {
88    if (unlikely (num_glyphs == (unsigned int) -1))
89      load_num_glyphs ();
90    return num_glyphs;
91  }
92
93  private:
94  HB_INTERNAL void load_upem (void) const;
95  HB_INTERNAL void load_num_glyphs (void) const;
96};
97
98extern HB_INTERNAL const hb_face_t _hb_face_nil;
99
100#define HB_SHAPER_DATA_CREATE_FUNC_EXTRA_ARGS
101#define HB_SHAPER_IMPLEMENT(shaper) HB_SHAPER_DATA_PROTOTYPE(shaper, face);
102#include "hb-shaper-list.hh"
103#undef HB_SHAPER_IMPLEMENT
104#undef HB_SHAPER_DATA_CREATE_FUNC_EXTRA_ARGS
105
106
107#endif /* HB_FACE_PRIVATE_HH */
108