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_PRIVATE_HH |
28 | #define HB_OT_SHAPE_PRIVATE_HH |
29 | |
30 | #include "hb-private.hh" |
31 | |
32 | #include "hb-ot-map-private.hh" |
33 | #include "hb-ot-layout-private.hh" |
34 | |
35 | |
36 | |
37 | struct 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 (plan: this, font, buffer); } |
60 | inline void position (hb_font_t *font, hb_buffer_t *buffer) const { map.position (plan: this, font, buffer); } |
61 | |
62 | void finish (void) { map.finish (); } |
63 | }; |
64 | |
65 | struct hb_ot_shape_planner_t |
66 | { |
67 | /* In the order that they are filled in. */ |
68 | hb_face_t *face; |
69 | hb_segment_properties_t props; |
70 | const struct hb_ot_complex_shaper_t *shaper; |
71 | hb_ot_map_builder_t map; |
72 | |
73 | hb_ot_shape_planner_t (const hb_shape_plan_t *master_plan) : |
74 | face (master_plan->face_unsafe), |
75 | props (master_plan->props), |
76 | shaper (nullptr), |
77 | map (face, &props) {} |
78 | ~hb_ot_shape_planner_t (void) { map.finish (); } |
79 | |
80 | inline void compile (hb_ot_shape_plan_t &plan, |
81 | const int *coords, |
82 | unsigned int num_coords) |
83 | { |
84 | plan.props = props; |
85 | plan.shaper = shaper; |
86 | map.compile (m&: plan.map, coords, num_coords); |
87 | |
88 | plan.rtlm_mask = plan.map.get_1_mask (HB_TAG ('r','t','l','m')); |
89 | plan.frac_mask = plan.map.get_1_mask (HB_TAG ('f','r','a','c')); |
90 | plan.numr_mask = plan.map.get_1_mask (HB_TAG ('n','u','m','r')); |
91 | plan.dnom_mask = plan.map.get_1_mask (HB_TAG ('d','n','o','m')); |
92 | |
93 | plan.kern_mask = plan.map.get_mask (HB_DIRECTION_IS_HORIZONTAL (plan.props.direction) ? |
94 | HB_TAG ('k','e','r','n') : HB_TAG ('v','k','r','n')); |
95 | |
96 | plan.has_frac = plan.frac_mask || (plan.numr_mask && plan.dnom_mask); |
97 | plan.has_kern = !!plan.kern_mask; |
98 | plan.has_mark = !!plan.map.get_1_mask (HB_TAG ('m','a','r','k')); |
99 | } |
100 | |
101 | private: |
102 | /* No copy. */ |
103 | hb_ot_shape_planner_t (const hb_ot_shape_planner_t &); |
104 | hb_ot_shape_planner_t &operator = (const hb_ot_shape_planner_t &); |
105 | }; |
106 | |
107 | |
108 | #endif /* HB_OT_SHAPE_PRIVATE_HH */ |
109 | |