33 34 35 struct hb_ot_shape_plan_t; 36 37 static const hb_tag_t table_tags[2] = {HB_OT_TAG_GSUB, HB_OT_TAG_GPOS}; 38 39 struct hb_ot_map_t 40 { 41 friend struct hb_ot_map_builder_t; 42 43 public: 44 45 struct feature_map_t { 46 hb_tag_t tag; /* should be first for our bsearch to work */ 47 unsigned int index[2]; /* GSUB/GPOS */ 48 unsigned int stage[2]; /* GSUB/GPOS */ 49 unsigned int shift; 50 hb_mask_t mask; 51 hb_mask_t _1_mask; /* mask for value=1, for quick access */ 52 unsigned int needs_fallback : 1; 53 unsigned int auto_zwj : 1; 54 55 static int cmp (const feature_map_t *a, const feature_map_t *b) 56 { return a->tag < b->tag ? -1 : a->tag > b->tag ? 1 : 0; } 57 }; 58 59 struct lookup_map_t { 60 unsigned short index; 61 unsigned short auto_zwj : 1; 62 hb_mask_t mask; 63 64 static int cmp (const lookup_map_t *a, const lookup_map_t *b) 65 { return a->index < b->index ? -1 : a->index > b->index ? 1 : 0; } 66 }; 67 68 typedef void (*pause_func_t) (const struct hb_ot_shape_plan_t *plan, hb_font_t *font, hb_buffer_t *buffer); 69 70 struct stage_map_t { 71 unsigned int last_lookup; /* Cumulative */ 72 pause_func_t pause_func; 73 }; 74 75 76 hb_ot_map_t (void) { memset (this, 0, sizeof (*this)); } 77 78 inline hb_mask_t get_global_mask (void) const { return global_mask; } 79 80 inline hb_mask_t get_mask (hb_tag_t feature_tag, unsigned int *shift = NULL) const { 81 const feature_map_t *map = features.bsearch (&feature_tag); 82 if (shift) *shift = map ? map->shift : 0; 83 return map ? map->mask : 0; 84 } 85 86 inline bool needs_fallback (hb_tag_t feature_tag) const { 87 const feature_map_t *map = features.bsearch (&feature_tag); 88 return map ? map->needs_fallback : false; 89 } 90 91 inline hb_mask_t get_1_mask (hb_tag_t feature_tag) const { 92 const feature_map_t *map = features.bsearch (&feature_tag); 93 return map ? map->_1_mask : 0; 94 } 95 96 inline unsigned int get_feature_index (unsigned int table_index, hb_tag_t feature_tag) const { 97 const feature_map_t *map = features.bsearch (&feature_tag); 98 return map ? map->index[table_index] : HB_OT_LAYOUT_NO_FEATURE_INDEX; 99 } 100 101 inline unsigned int get_feature_stage (unsigned int table_index, hb_tag_t feature_tag) const { 102 const feature_map_t *map = features.bsearch (&feature_tag); 103 return map ? map->stage[table_index] : (unsigned int) -1; 104 } 105 106 inline void get_stage_lookups (unsigned int table_index, unsigned int stage, 107 const struct lookup_map_t **plookups, unsigned int *lookup_count) const { 108 if (unlikely (stage == (unsigned int) -1)) { 109 *plookups = NULL; 110 *lookup_count = 0; 111 return; 112 } 113 assert (stage <= stages[table_index].len); 114 unsigned int start = stage ? stages[table_index][stage - 1].last_lookup : 0; 115 unsigned int end = stage < stages[table_index].len ? stages[table_index][stage].last_lookup : lookups[table_index].len; 116 *plookups = &lookups[table_index][start]; 117 *lookup_count = end - start; 118 } 119 120 HB_INTERNAL void collect_lookups (unsigned int table_index, hb_set_t *lookups) const; 121 template <typename Proxy> 122 HB_INTERNAL inline void apply (const Proxy &proxy, 123 const struct hb_ot_shape_plan_t *plan, hb_font_t *font, hb_buffer_t *buffer) const; 124 HB_INTERNAL void substitute (const struct hb_ot_shape_plan_t *plan, hb_font_t *font, hb_buffer_t *buffer) const; 125 HB_INTERNAL void position (const struct hb_ot_shape_plan_t *plan, hb_font_t *font, hb_buffer_t *buffer) const; 126 127 inline void finish (void) { 128 features.finish (); 129 for (unsigned int table_index = 0; table_index < 2; table_index++) 130 { 131 lookups[table_index].finish (); 132 stages[table_index].finish (); 133 } 134 } 135 136 public: 137 hb_tag_t chosen_script[2]; 138 bool found_script[2]; 139 140 private: 141 142 hb_mask_t global_mask; 143 144 hb_prealloced_array_t<feature_map_t, 8> features; 145 hb_prealloced_array_t<lookup_map_t, 32> lookups[2]; /* GSUB/GPOS */ 146 hb_prealloced_array_t<stage_map_t, 4> stages[2]; /* GSUB/GPOS */ 147 }; 148 149 enum hb_ot_map_feature_flags_t { 150 F_NONE = 0x0000u, 151 F_GLOBAL = 0x0001u, /* Feature applies to all characters; results in no mask allocated for it. */ 152 F_HAS_FALLBACK = 0x0002u, /* Has fallback implementation, so include mask bit even if feature not found. */ 153 F_MANUAL_ZWJ = 0x0004u, /* Don't skip over ZWJ when matching. */ 154 F_GLOBAL_SEARCH = 0x0008u /* If feature not found in LangSys, look for it in global feature list and pick one. */ 155 }; 156 HB_MARK_AS_FLAG_T (hb_ot_map_feature_flags_t); 157 /* Macro version for where const is desired. */ 158 #define F_COMBINE(l,r) (hb_ot_map_feature_flags_t ((unsigned int) (l) | (unsigned int) (r))) 159 160 161 struct hb_ot_map_builder_t 162 { 163 public: 164 165 HB_INTERNAL hb_ot_map_builder_t (hb_face_t *face_, 166 const hb_segment_properties_t *props_); 167 168 HB_INTERNAL void add_feature (hb_tag_t tag, unsigned int value, 169 hb_ot_map_feature_flags_t flags); 170 171 inline void add_global_bool_feature (hb_tag_t tag) 172 { add_feature (tag, 1, F_GLOBAL); } 173 174 inline void add_gsub_pause (hb_ot_map_t::pause_func_t pause_func) 179 HB_INTERNAL void compile (hb_ot_map_t &m, 180 const int *coords, 181 unsigned int num_coords); 182 183 inline void finish (void) { 184 feature_infos.finish (); 185 for (unsigned int table_index = 0; table_index < 2; table_index++) 186 { 187 stages[table_index].finish (); 188 } 189 } 190 191 private: 192 193 HB_INTERNAL void add_lookups (hb_ot_map_t &m, 194 hb_face_t *face, 195 unsigned int table_index, 196 unsigned int feature_index, 197 unsigned int variations_index, 198 hb_mask_t mask, 199 bool auto_zwj); 200 201 struct feature_info_t { 202 hb_tag_t tag; 203 unsigned int seq; /* sequence#, used for stable sorting only */ 204 unsigned int max_value; 205 hb_ot_map_feature_flags_t flags; 206 unsigned int default_value; /* for non-global features, what should the unset glyphs take */ 207 unsigned int stage[2]; /* GSUB/GPOS */ 208 209 static int cmp (const feature_info_t *a, const feature_info_t *b) 210 { return (a->tag != b->tag) ? (a->tag < b->tag ? -1 : 1) : 211 (a->seq < b->seq ? -1 : a->seq > b->seq ? 1 : 0); } 212 }; 213 214 struct stage_info_t { 215 unsigned int index; 216 hb_ot_map_t::pause_func_t pause_func; 217 }; 218 219 HB_INTERNAL void add_pause (unsigned int table_index, hb_ot_map_t::pause_func_t pause_func); 220 221 public: 222 223 hb_face_t *face; 224 hb_segment_properties_t props; 225 226 hb_tag_t chosen_script[2]; 227 bool found_script[2]; 228 unsigned int script_index[2], language_index[2]; 229 230 private: 231 | 33 34 35 struct hb_ot_shape_plan_t; 36 37 static const hb_tag_t table_tags[2] = {HB_OT_TAG_GSUB, HB_OT_TAG_GPOS}; 38 39 struct hb_ot_map_t 40 { 41 friend struct hb_ot_map_builder_t; 42 43 public: 44 45 struct feature_map_t { 46 hb_tag_t tag; /* should be first for our bsearch to work */ 47 unsigned int index[2]; /* GSUB/GPOS */ 48 unsigned int stage[2]; /* GSUB/GPOS */ 49 unsigned int shift; 50 hb_mask_t mask; 51 hb_mask_t _1_mask; /* mask for value=1, for quick access */ 52 unsigned int needs_fallback : 1; 53 unsigned int auto_zwnj : 1; 54 unsigned int auto_zwj : 1; 55 56 inline int cmp (const hb_tag_t *tag_) const 57 { return *tag_ < tag ? -1 : *tag_ > tag ? 1 : 0; } 58 }; 59 60 struct lookup_map_t { 61 unsigned short index; 62 unsigned short auto_zwnj : 1; 63 unsigned short auto_zwj : 1; 64 hb_mask_t mask; 65 66 static int cmp (const void *pa, const void *pb) 67 { 68 const lookup_map_t *a = (const lookup_map_t *) pa; 69 const lookup_map_t *b = (const lookup_map_t *) pb; 70 return a->index < b->index ? -1 : a->index > b->index ? 1 : 0; 71 } 72 }; 73 74 typedef void (*pause_func_t) (const struct hb_ot_shape_plan_t *plan, hb_font_t *font, hb_buffer_t *buffer); 75 76 struct stage_map_t { 77 unsigned int last_lookup; /* Cumulative */ 78 pause_func_t pause_func; 79 }; 80 81 82 hb_ot_map_t (void) { memset (this, 0, sizeof (*this)); } 83 84 inline hb_mask_t get_global_mask (void) const { return global_mask; } 85 86 inline hb_mask_t get_mask (hb_tag_t feature_tag, unsigned int *shift = nullptr) const { 87 const feature_map_t *map = features.bsearch (&feature_tag); 88 if (shift) *shift = map ? map->shift : 0; 89 return map ? map->mask : 0; 90 } 91 92 inline bool needs_fallback (hb_tag_t feature_tag) const { 93 const feature_map_t *map = features.bsearch (&feature_tag); 94 return map ? map->needs_fallback : false; 95 } 96 97 inline hb_mask_t get_1_mask (hb_tag_t feature_tag) const { 98 const feature_map_t *map = features.bsearch (&feature_tag); 99 return map ? map->_1_mask : 0; 100 } 101 102 inline unsigned int get_feature_index (unsigned int table_index, hb_tag_t feature_tag) const { 103 const feature_map_t *map = features.bsearch (&feature_tag); 104 return map ? map->index[table_index] : HB_OT_LAYOUT_NO_FEATURE_INDEX; 105 } 106 107 inline unsigned int get_feature_stage (unsigned int table_index, hb_tag_t feature_tag) const { 108 const feature_map_t *map = features.bsearch (&feature_tag); 109 return map ? map->stage[table_index] : (unsigned int) -1; 110 } 111 112 inline void get_stage_lookups (unsigned int table_index, unsigned int stage, 113 const struct lookup_map_t **plookups, unsigned int *lookup_count) const { 114 if (unlikely (stage == (unsigned int) -1)) { 115 *plookups = nullptr; 116 *lookup_count = 0; 117 return; 118 } 119 assert (stage <= stages[table_index].len); 120 unsigned int start = stage ? stages[table_index][stage - 1].last_lookup : 0; 121 unsigned int end = stage < stages[table_index].len ? stages[table_index][stage].last_lookup : lookups[table_index].len; 122 *plookups = end == start ? nullptr : &lookups[table_index][start]; 123 *lookup_count = end - start; 124 } 125 126 HB_INTERNAL void collect_lookups (unsigned int table_index, hb_set_t *lookups) const; 127 template <typename Proxy> 128 HB_INTERNAL inline void apply (const Proxy &proxy, 129 const struct hb_ot_shape_plan_t *plan, hb_font_t *font, hb_buffer_t *buffer) const; 130 HB_INTERNAL void substitute (const struct hb_ot_shape_plan_t *plan, hb_font_t *font, hb_buffer_t *buffer) const; 131 HB_INTERNAL void position (const struct hb_ot_shape_plan_t *plan, hb_font_t *font, hb_buffer_t *buffer) const; 132 133 inline void finish (void) { 134 features.finish (); 135 for (unsigned int table_index = 0; table_index < 2; table_index++) 136 { 137 lookups[table_index].finish (); 138 stages[table_index].finish (); 139 } 140 } 141 142 public: 143 hb_tag_t chosen_script[2]; 144 bool found_script[2]; 145 146 private: 147 148 hb_mask_t global_mask; 149 150 hb_prealloced_array_t<feature_map_t, 8> features; 151 hb_prealloced_array_t<lookup_map_t, 32> lookups[2]; /* GSUB/GPOS */ 152 hb_prealloced_array_t<stage_map_t, 4> stages[2]; /* GSUB/GPOS */ 153 }; 154 155 enum hb_ot_map_feature_flags_t { 156 F_NONE = 0x0000u, 157 F_GLOBAL = 0x0001u, /* Feature applies to all characters; results in no mask allocated for it. */ 158 F_HAS_FALLBACK = 0x0002u, /* Has fallback implementation, so include mask bit even if feature not found. */ 159 F_MANUAL_ZWNJ = 0x0004u, /* Don't skip over ZWNJ when matching **context**. */ 160 F_MANUAL_ZWJ = 0x0008u, /* Don't skip over ZWJ when matching **input**. */ 161 F_GLOBAL_SEARCH = 0x0010u /* If feature not found in LangSys, look for it in global feature list and pick one. */ 162 }; 163 HB_MARK_AS_FLAG_T (hb_ot_map_feature_flags_t); 164 /* Macro version for where const is desired. */ 165 #define F_COMBINE(l,r) (hb_ot_map_feature_flags_t ((unsigned int) (l) | (unsigned int) (r))) 166 167 168 struct hb_ot_map_builder_t 169 { 170 public: 171 172 HB_INTERNAL hb_ot_map_builder_t (hb_face_t *face_, 173 const hb_segment_properties_t *props_); 174 175 HB_INTERNAL void add_feature (hb_tag_t tag, unsigned int value, 176 hb_ot_map_feature_flags_t flags); 177 178 inline void add_global_bool_feature (hb_tag_t tag) 179 { add_feature (tag, 1, F_GLOBAL); } 180 181 inline void add_gsub_pause (hb_ot_map_t::pause_func_t pause_func) 186 HB_INTERNAL void compile (hb_ot_map_t &m, 187 const int *coords, 188 unsigned int num_coords); 189 190 inline void finish (void) { 191 feature_infos.finish (); 192 for (unsigned int table_index = 0; table_index < 2; table_index++) 193 { 194 stages[table_index].finish (); 195 } 196 } 197 198 private: 199 200 HB_INTERNAL void add_lookups (hb_ot_map_t &m, 201 hb_face_t *face, 202 unsigned int table_index, 203 unsigned int feature_index, 204 unsigned int variations_index, 205 hb_mask_t mask, 206 bool auto_zwnj = true, 207 bool auto_zwj = true); 208 209 struct feature_info_t { 210 hb_tag_t tag; 211 unsigned int seq; /* sequence#, used for stable sorting only */ 212 unsigned int max_value; 213 hb_ot_map_feature_flags_t flags; 214 unsigned int default_value; /* for non-global features, what should the unset glyphs take */ 215 unsigned int stage[2]; /* GSUB/GPOS */ 216 217 static int cmp (const void *pa, const void *pb) 218 { 219 const feature_info_t *a = (const feature_info_t *) pa; 220 const feature_info_t *b = (const feature_info_t *) pb; 221 return (a->tag != b->tag) ? (a->tag < b->tag ? -1 : 1) : 222 (a->seq < b->seq ? -1 : a->seq > b->seq ? 1 : 0); 223 } 224 }; 225 226 struct stage_info_t { 227 unsigned int index; 228 hb_ot_map_t::pause_func_t pause_func; 229 }; 230 231 HB_INTERNAL void add_pause (unsigned int table_index, hb_ot_map_t::pause_func_t pause_func); 232 233 public: 234 235 hb_face_t *face; 236 hb_segment_properties_t props; 237 238 hb_tag_t chosen_script[2]; 239 bool found_script[2]; 240 unsigned int script_index[2], language_index[2]; 241 242 private: 243 |