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 | |
43 | struct hb_face_t { |
44 | hb_object_header_t ; |
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 | |
102 | extern HB_INTERNAL const hb_face_t _hb_face_nil; |
103 | |
104 | #define |
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 | |