/src/harfbuzz/src/hb-face.hh
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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_HH |
30 | | #define HB_FACE_HH |
31 | | |
32 | | #include "hb.hh" |
33 | | |
34 | | #include "hb-shaper.hh" |
35 | | #include "hb-shape-plan.hh" |
36 | | #include "hb-ot-face.hh" |
37 | | |
38 | | |
39 | | /* |
40 | | * hb_face_t |
41 | | */ |
42 | | |
43 | | #define HB_SHAPER_IMPLEMENT(shaper) HB_SHAPER_DATA_INSTANTIATE_SHAPERS(shaper, face); |
44 | | #include "hb-shaper-list.hh" |
45 | | #undef HB_SHAPER_IMPLEMENT |
46 | | |
47 | | struct hb_face_t |
48 | | { |
49 | | hb_object_header_t header; |
50 | | |
51 | | hb_reference_table_func_t reference_table_func; |
52 | | void *user_data; |
53 | | hb_destroy_func_t destroy; |
54 | | |
55 | | unsigned int index; /* Face index in a collection, zero-based. */ |
56 | | mutable hb_atomic_int_t upem; /* Units-per-EM. */ |
57 | | mutable hb_atomic_int_t num_glyphs; /* Number of glyphs. */ |
58 | | |
59 | | hb_shaper_object_dataset_t<hb_face_t> data;/* Various shaper data. */ |
60 | | hb_ot_face_t table; /* All the face's tables. */ |
61 | | |
62 | | /* Cache */ |
63 | | struct plan_node_t |
64 | | { |
65 | | hb_shape_plan_t *shape_plan; |
66 | | plan_node_t *next; |
67 | | }; |
68 | | hb_atomic_ptr_t<plan_node_t> shape_plans; |
69 | | |
70 | | hb_blob_t *reference_table (hb_tag_t tag) const |
71 | 224M | { |
72 | 224M | hb_blob_t *blob; |
73 | | |
74 | 224M | if (unlikely (!reference_table_func)) |
75 | 0 | return hb_blob_get_empty (); |
76 | | |
77 | 224M | blob = reference_table_func (/*XXX*/const_cast<hb_face_t *> (this), tag, user_data); |
78 | 224M | if (unlikely (!blob)) |
79 | 0 | return hb_blob_get_empty (); |
80 | | |
81 | 224M | return blob; |
82 | 224M | } |
83 | | |
84 | | unsigned int get_upem () const |
85 | 35.0M | { |
86 | 35.0M | unsigned int ret = upem.get_relaxed (); |
87 | 35.0M | if (unlikely (!ret)) |
88 | 5.77M | { |
89 | 5.77M | return load_upem (); |
90 | 5.77M | } |
91 | 29.2M | return ret; |
92 | 35.0M | } |
93 | | |
94 | | unsigned int get_num_glyphs () const |
95 | 236M | { |
96 | 236M | unsigned int ret = num_glyphs.get_relaxed (); |
97 | 236M | if (unlikely (ret == UINT_MAX)) |
98 | 5.77M | return load_num_glyphs (); |
99 | 231M | return ret; |
100 | 236M | } |
101 | | |
102 | | private: |
103 | | HB_INTERNAL unsigned int load_upem () const; |
104 | | HB_INTERNAL unsigned int load_num_glyphs () const; |
105 | | }; |
106 | | DECLARE_NULL_INSTANCE (hb_face_t); |
107 | | |
108 | | |
109 | | #endif /* HB_FACE_HH */ |