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
36struct 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 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 == hb_memcmp (this, other, sizeof (*this));
55 }
56};
57
58
59struct hb_shape_plan_key_t;
60
61struct hb_ot_shape_plan_t
62{
63 ~hb_ot_shape_plan_t () { fini (); }
64
65 hb_segment_properties_t props;
66 const struct hb_ot_shaper_t *shaper;
67 hb_ot_map_t map;
68 const void *data;
69#ifndef HB_NO_OT_SHAPE_FRACTIONS
70 hb_mask_t frac_mask, numr_mask, dnom_mask;
71#else
72 static constexpr hb_mask_t frac_mask = 0;
73 static constexpr hb_mask_t numr_mask = 0;
74 static constexpr hb_mask_t dnom_mask = 0;
75#endif
76 hb_mask_t rtlm_mask;
77#ifndef HB_NO_OT_KERN
78 hb_mask_t kern_mask;
79#else
80 static constexpr hb_mask_t kern_mask = 0;
81#endif
82#ifndef HB_NO_AAT_SHAPE
83 hb_mask_t trak_mask;
84#else
85 static constexpr hb_mask_t trak_mask = 0;
86#endif
87
88#ifndef HB_NO_OT_KERN
89 bool requested_kerning : 1;
90#else
91 static constexpr bool requested_kerning = false;
92#endif
93#ifndef HB_NO_AAT_SHAPE
94 bool requested_tracking : 1;
95#else
96 static constexpr bool requested_tracking = false;
97#endif
98#ifndef HB_NO_OT_SHAPE_FRACTIONS
99 bool has_frac : 1;
100#else
101 static constexpr bool has_frac = false;
102#endif
103 bool has_vert : 1;
104 bool has_gpos_mark : 1;
105 bool zero_marks : 1;
106 bool fallback_glyph_classes : 1;
107 bool fallback_mark_positioning : 1;
108 bool adjust_mark_positioning_when_zeroing : 1;
109
110 bool apply_gpos : 1;
111#ifndef HB_NO_OT_KERN
112 bool apply_kern : 1;
113#else
114 static constexpr bool apply_kern = false;
115#endif
116 bool apply_fallback_kern : 1;
117#ifndef HB_NO_AAT_SHAPE
118 bool apply_kerx : 1;
119 bool apply_morx : 1;
120 bool apply_trak : 1;
121#else
122 static constexpr bool apply_kerx = false;
123 static constexpr bool apply_morx = false;
124 static constexpr bool apply_trak = false;
125#endif
126
127 void collect_lookups (hb_tag_t table_tag, hb_set_t *lookups) const
128 {
129 unsigned int table_index;
130 switch (table_tag) {
131 case HB_OT_TAG_GSUB: table_index = 0; break;
132 case HB_OT_TAG_GPOS: table_index = 1; break;
133 default: return;
134 }
135 map.collect_lookups (table_index, lookups);
136 }
137
138 HB_INTERNAL bool init0 (hb_face_t *face,
139 const hb_shape_plan_key_t *key);
140 HB_INTERNAL void fini ();
141
142 HB_INTERNAL void substitute (hb_font_t *font, hb_buffer_t *buffer) const;
143 HB_INTERNAL void position (hb_font_t *font, hb_buffer_t *buffer) const;
144};
145
146struct hb_shape_plan_t;
147
148struct hb_ot_shape_planner_t
149{
150 /* In the order that they are filled in. */
151 hb_face_t *face;
152 hb_segment_properties_t props;
153 hb_ot_map_builder_t map;
154#ifndef HB_NO_AAT_SHAPE
155 bool apply_morx : 1;
156#else
157 static constexpr bool apply_morx = false;
158#endif
159 bool script_zero_marks : 1;
160 bool script_fallback_mark_positioning : 1;
161 const struct hb_ot_shaper_t *shaper;
162
163 HB_INTERNAL hb_ot_shape_planner_t (hb_face_t *face,
164 const hb_segment_properties_t &props);
165
166 HB_INTERNAL void compile (hb_ot_shape_plan_t &plan,
167 const hb_ot_shape_plan_key_t &key);
168};
169
170
171#endif /* HB_OT_SHAPE_HH */
172