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_HH
28 #define HB_OT_SHAPE_HH
29
30 #include "hb.hh"
31
32 #include "hb-ot-map.hh"
33 #include "hb-aat-map.hh"
34
35
36 struct hb_ot_shape_plan_key_t
37 {
38 unsigned int variations_index[2];
39
40 void init (hb_face_t *face,
41 const int *coords,
42 unsigned int num_coords)
43 {
44 for (unsigned int table_index = 0; table_index < 2; table_index++)
45 hb_ot_layout_table_find_feature_variations (face,
46 table_tags[table_index],
47 coords,
48 num_coords,
49 &variations_index[table_index]);
50 }
51
52 bool equal (const hb_ot_shape_plan_key_t *other)
53 {
54 return 0 == memcmp (this, other, sizeof (*this));
55 }
56 };
57
58
59 struct hb_shape_plan_key_t;
60
61 struct hb_ot_shape_plan_t
62 {
63 hb_segment_properties_t props;
64 const struct hb_ot_complex_shaper_t *shaper;
65 hb_ot_map_t map;
66 hb_aat_map_t aat_map;
67 const void *data;
68 hb_mask_t frac_mask, numr_mask, dnom_mask;
69 hb_mask_t rtlm_mask;
70 hb_mask_t kern_mask;
71 hb_mask_t trak_mask;
72
73 bool requested_kerning : 1;
74 bool requested_tracking : 1;
75 bool has_frac : 1;
76 bool has_gpos_mark : 1;
77 bool zero_marks : 1;
78 bool fallback_glyph_classes : 1;
79 bool fallback_mark_positioning : 1;
80 bool adjust_mark_positioning_when_zeroing : 1;
81
82 bool apply_gpos : 1;
83 bool apply_kerx : 1;
84 bool apply_kern : 1;
85 bool apply_morx : 1;
86 bool apply_trak : 1;
87
88 void collect_lookups (hb_tag_t table_tag, hb_set_t *lookups) const
89 {
90 unsigned int table_index;
91 switch (table_tag) {
92 case HB_OT_TAG_GSUB: table_index = 0; break;
93 case HB_OT_TAG_GPOS: table_index = 1; break;
94 default: return;
95 }
96 map.collect_lookups (table_index, lookups);
97 }
98
99 HB_INTERNAL bool init0 (hb_face_t *face,
100 const hb_shape_plan_key_t *key);
101 HB_INTERNAL void fini ();
102
103 HB_INTERNAL void substitute (hb_font_t *font, hb_buffer_t *buffer) const;
104 HB_INTERNAL void position (hb_font_t *font, hb_buffer_t *buffer) const;
105 };
106
107 struct hb_shape_plan_t;
108
109 struct hb_ot_shape_planner_t
110 {
111 /* In the order that they are filled in. */
112 hb_face_t *face;
113 hb_segment_properties_t props;
114 hb_ot_map_builder_t map;
115 hb_aat_map_builder_t aat_map;
116 bool apply_morx : 1;
117 bool script_zero_marks : 1;
118 bool script_fallback_mark_positioning : 1;
119 const struct hb_ot_complex_shaper_t *shaper;
120
121 HB_INTERNAL hb_ot_shape_planner_t (hb_face_t *face,
122 const hb_segment_properties_t *props);
123
124 HB_INTERNAL void compile (hb_ot_shape_plan_t &plan,
125 const hb_ot_shape_plan_key_t &key);
126 };
127
128
129 #endif /* HB_OT_SHAPE_HH */