44 static hb_tag_t common_features[] = {
45 HB_TAG('c','c','m','p'),
46 HB_TAG('l','i','g','a'),
47 HB_TAG('l','o','c','l'),
48 HB_TAG('m','a','r','k'),
49 HB_TAG('m','k','m','k'),
50 HB_TAG('r','l','i','g'),
51 };
54 static hb_tag_t horizontal_features[] = {
55 HB_TAG('c','a','l','t'),
56 HB_TAG('c','l','i','g'),
57 HB_TAG('c','u','r','s'),
58 HB_TAG('k','e','r','n'),
59 HB_TAG('r','c','l','t'),
60 };
62 static hb_tag_t vertical_features[] = {
63 HB_TAG('v','e','r','t'),
64 };
68 static void
69 hb_ot_shape_collect_features (hb_ot_shape_planner_t *planner,
70 const hb_segment_properties_t *props,
71 const hb_feature_t *user_features,
72 unsigned int num_user_features)
73 {
74 hb_ot_map_builder_t *map = &planner->map;
75
76 switch (props->direction) {
77 case HB_DIRECTION_LTR:
78 map->add_global_bool_feature (HB_TAG ('l','t','r','a'));
79 map->add_global_bool_feature (HB_TAG ('l','t','r','m'));
80 break;
81 case HB_DIRECTION_RTL:
82 map->add_global_bool_feature (HB_TAG ('r','t','l','a'));
83 map->add_feature (HB_TAG ('r','t','l','m'), 1, F_NONE);
84 break;
85 case HB_DIRECTION_TTB:
86 case HB_DIRECTION_BTT:
87 case HB_DIRECTION_INVALID:
88 default:
89 break;
90 }
91
92 map->add_feature (HB_TAG ('f','r','a','c'), 1, F_NONE);
93 map->add_feature (HB_TAG ('n','u','m','r'), 1, F_NONE);
94 map->add_feature (HB_TAG ('d','n','o','m'), 1, F_NONE);
95
96 if (planner->shaper->collect_features)
97 planner->shaper->collect_features (planner);
98
99 for (unsigned int i = 0; i < ARRAY_LENGTH (common_features); i++)
100 map->add_global_bool_feature (common_features[i]);
101
102 if (HB_DIRECTION_IS_HORIZONTAL (props->direction))
103 for (unsigned int i = 0; i < ARRAY_LENGTH (horizontal_features); i++)
104 map->add_feature (horizontal_features[i], 1, F_GLOBAL |
105 (horizontal_features[i] == HB_TAG('k','e','r','n') ?
106 F_HAS_FALLBACK : F_NONE));
107 else
108 for (unsigned int i = 0; i < ARRAY_LENGTH (vertical_features); i++)
109 map->add_feature (vertical_features[i], 1, F_GLOBAL |
110 (vertical_features[i] == HB_TAG('v','k','r','n') ?
111 F_HAS_FALLBACK : F_NONE));
112
113 if (planner->shaper->override_features)
114 planner->shaper->override_features (planner);
115
116 for (unsigned int i = 0; i < num_user_features; i++) {
117 const hb_feature_t *feature = &user_features[i];
118 map->add_feature (feature->tag, feature->value,
119 (feature->start == 0 && feature->end == (unsigned int) -1) ?
120 F_GLOBAL : F_NONE);
121 }
122 }