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; /* Face index in a collection, zero-based. */
54 mutable unsigned int upem; /* Units-per-EM. */
55 mutable unsigned int num_glyphs; /* Number of glyphs. */
56
57 struct hb_shaper_data_t shaper_data; /* Various shaper data. */
58
59 /* Various non-shaping data. */
60 /* ... */
61
62 /* Cache */
63 struct plan_node_t {
64 hb_shape_plan_t *shape_plan;
65 plan_node_t *next;
66 } *shape_plans;
67
68
69 inline hb_blob_t *reference_table (hb_tag_t tag) const
70 {
71 hb_blob_t *blob;
72
73 if (unlikely (!reference_table_func))
74 return hb_blob_get_empty ();
75
76 blob = reference_table_func (/*XXX*/const_cast<hb_face_t *> (this), tag, user_data);
77 if (unlikely (!blob))
78 return hb_blob_get_empty ();
79
80 return blob;
81 }
82
83 inline HB_PURE_FUNC unsigned int get_upem (void) const
84 {
85 if (unlikely (!upem))
86 load_upem ();
87 return upem;
88 }
89
90 inline unsigned int get_num_glyphs (void) const
91 {
92 if (unlikely (num_glyphs == (unsigned int) -1))
93 load_num_glyphs ();
94 return num_glyphs;
95 }
96
97 private:
98 HB_INTERNAL void load_upem (void) const;
99 HB_INTERNAL void load_num_glyphs (void) const;
100};
101
102extern HB_INTERNAL const hb_face_t _hb_face_nil;
103
104#define HB_SHAPER_DATA_CREATE_FUNC_EXTRA_ARGS
105#define HB_SHAPER_IMPLEMENT(shaper) HB_SHAPER_DATA_PROTOTYPE(shaper, face);
106#include "hb-shaper-list.hh"
107#undef HB_SHAPER_IMPLEMENT
108#undef HB_SHAPER_DATA_CREATE_FUNC_EXTRA_ARGS
109
110
111#endif /* HB_FACE_PRIVATE_HH */
112

source code of qtbase/src/3rdparty/harfbuzz-ng/src/hb-face-private.hh