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-ot-layout.hh"
34
35
36
37struct hb_ot_shape_plan_t
38{
39 hb_segment_properties_t props;
40 const struct hb_ot_complex_shaper_t *shaper;
41 hb_ot_map_t map;
42 const void *data;
43 hb_mask_t rtlm_mask, frac_mask, numr_mask, dnom_mask;
44 hb_mask_t kern_mask;
45 unsigned int has_frac : 1;
46 unsigned int has_kern : 1;
47 unsigned int has_mark : 1;
48
49 inline void collect_lookups (hb_tag_t table_tag, hb_set_t *lookups) const
50 {
51 unsigned int table_index;
52 switch (table_tag) {
53 case HB_OT_TAG_GSUB: table_index = 0; break;
54 case HB_OT_TAG_GPOS: table_index = 1; break;
55 default: return;
56 }
57 map.collect_lookups (table_index, lookups);
58 }
59 inline void substitute (hb_font_t *font, hb_buffer_t *buffer) const { map.substitute (this, font, buffer); }
60 inline void position (hb_font_t *font, hb_buffer_t *buffer) const { map.position (this, font, buffer); }
61
62 void init (void)
63 {
64 memset (this, 0, sizeof (*this));
65 map.init ();
66 }
67 void fini (void) {
68 map.fini ();
69 }
70};
71
72struct hb_ot_shape_planner_t
73{
74 /* In the order that they are filled in. */
75 hb_face_t *face;
76 hb_segment_properties_t props;
77 const struct hb_ot_complex_shaper_t *shaper;
78 hb_ot_map_builder_t map;
79
80 hb_ot_shape_planner_t (const hb_shape_plan_t *master_plan) :
81 face (master_plan->face_unsafe),
82 props (master_plan->props),
83 shaper (nullptr),
84 map (face, &props) {}
85
86 inline void compile (hb_ot_shape_plan_t &plan,
87 const int *coords,
88 unsigned int num_coords)
89 {
90 plan.props = props;
91 plan.shaper = shaper;
92 map.compile (plan.map, coords, num_coords);
93
94 plan.rtlm_mask = plan.map.get_1_mask (HB_TAG ('r','t','l','m'));
95 plan.frac_mask = plan.map.get_1_mask (HB_TAG ('f','r','a','c'));
96 plan.numr_mask = plan.map.get_1_mask (HB_TAG ('n','u','m','r'));
97 plan.dnom_mask = plan.map.get_1_mask (HB_TAG ('d','n','o','m'));
98
99 plan.kern_mask = plan.map.get_mask (HB_DIRECTION_IS_HORIZONTAL (plan.props.direction) ?
100 HB_TAG ('k','e','r','n') : HB_TAG ('v','k','r','n'));
101
102 plan.has_frac = plan.frac_mask || (plan.numr_mask && plan.dnom_mask);
103 plan.has_kern = !!plan.kern_mask;
104 plan.has_mark = !!plan.map.get_1_mask (HB_TAG ('m','a','r','k'));
105 }
106
107 private:
108 HB_DISALLOW_COPY_AND_ASSIGN (hb_ot_shape_planner_t);
109};
110
111
112#endif /* HB_OT_SHAPE_HH */
113