| 1 | /* |
| 2 | * Copyright © 2018 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): Garret Rieger, Rod Sheeter, Behdad Esfahbod |
| 25 | */ |
| 26 | |
| 27 | #include "hb-subset.hh" |
| 28 | #include "hb-set.hh" |
| 29 | #include "hb-utf.hh" |
| 30 | |
| 31 | |
| 32 | hb_subset_input_t::hb_subset_input_t () |
| 33 | { |
| 34 | for (auto& set : sets_iter ()) |
| 35 | set = hb::shared_ptr<hb_set_t> (hb_set_create ()); |
| 36 | |
| 37 | if (in_error ()) |
| 38 | return; |
| 39 | |
| 40 | flags = HB_SUBSET_FLAGS_DEFAULT; |
| 41 | |
| 42 | hb_set_add_range (sets.name_ids, 0, 6); |
| 43 | hb_set_add (sets.name_languages, 0x0409); |
| 44 | |
| 45 | hb_tag_t default_drop_tables[] = { |
| 46 | // Layout disabled by default |
| 47 | HB_TAG ('m', 'o', 'r', 'x'), |
| 48 | HB_TAG ('m', 'o', 'r', 't'), |
| 49 | HB_TAG ('k', 'e', 'r', 'x'), |
| 50 | HB_TAG ('k', 'e', 'r', 'n'), |
| 51 | |
| 52 | // Copied from fontTools: |
| 53 | HB_TAG ('B', 'A', 'S', 'E'), |
| 54 | HB_TAG ('J', 'S', 'T', 'F'), |
| 55 | HB_TAG ('D', 'S', 'I', 'G'), |
| 56 | HB_TAG ('E', 'B', 'D', 'T'), |
| 57 | HB_TAG ('E', 'B', 'L', 'C'), |
| 58 | HB_TAG ('E', 'B', 'S', 'C'), |
| 59 | HB_TAG ('S', 'V', 'G', ' '), |
| 60 | HB_TAG ('P', 'C', 'L', 'T'), |
| 61 | HB_TAG ('L', 'T', 'S', 'H'), |
| 62 | // Graphite tables |
| 63 | HB_TAG ('F', 'e', 'a', 't'), |
| 64 | HB_TAG ('G', 'l', 'a', 't'), |
| 65 | HB_TAG ('G', 'l', 'o', 'c'), |
| 66 | HB_TAG ('S', 'i', 'l', 'f'), |
| 67 | HB_TAG ('S', 'i', 'l', 'l'), |
| 68 | }; |
| 69 | sets.drop_tables->add_array (default_drop_tables, ARRAY_LENGTH (default_drop_tables)); |
| 70 | |
| 71 | hb_tag_t default_no_subset_tables[] = { |
| 72 | HB_TAG ('g', 'a', 's', 'p'), |
| 73 | HB_TAG ('f', 'p', 'g', 'm'), |
| 74 | HB_TAG ('p', 'r', 'e', 'p'), |
| 75 | HB_TAG ('V', 'D', 'M', 'X'), |
| 76 | HB_TAG ('D', 'S', 'I', 'G'), |
| 77 | HB_TAG ('M', 'V', 'A', 'R'), |
| 78 | HB_TAG ('c', 'v', 'a', 'r'), |
| 79 | }; |
| 80 | sets.no_subset_tables->add_array (default_no_subset_tables, |
| 81 | ARRAY_LENGTH (default_no_subset_tables)); |
| 82 | |
| 83 | //copied from _layout_features_groups in fonttools |
| 84 | hb_tag_t default_layout_features[] = { |
| 85 | // default shaper |
| 86 | // common |
| 87 | HB_TAG ('r', 'v', 'r', 'n'), |
| 88 | HB_TAG ('c', 'c', 'm', 'p'), |
| 89 | HB_TAG ('l', 'i', 'g', 'a'), |
| 90 | HB_TAG ('l', 'o', 'c', 'l'), |
| 91 | HB_TAG ('m', 'a', 'r', 'k'), |
| 92 | HB_TAG ('m', 'k', 'm', 'k'), |
| 93 | HB_TAG ('r', 'l', 'i', 'g'), |
| 94 | |
| 95 | //fractions |
| 96 | HB_TAG ('f', 'r', 'a', 'c'), |
| 97 | HB_TAG ('n', 'u', 'm', 'r'), |
| 98 | HB_TAG ('d', 'n', 'o', 'm'), |
| 99 | |
| 100 | //horizontal |
| 101 | HB_TAG ('c', 'a', 'l', 't'), |
| 102 | HB_TAG ('c', 'l', 'i', 'g'), |
| 103 | HB_TAG ('c', 'u', 'r', 's'), |
| 104 | HB_TAG ('k', 'e', 'r', 'n'), |
| 105 | HB_TAG ('r', 'c', 'l', 't'), |
| 106 | |
| 107 | //vertical |
| 108 | HB_TAG ('v', 'a', 'l', 't'), |
| 109 | HB_TAG ('v', 'e', 'r', 't'), |
| 110 | HB_TAG ('v', 'k', 'r', 'n'), |
| 111 | HB_TAG ('v', 'p', 'a', 'l'), |
| 112 | HB_TAG ('v', 'r', 't', '2'), |
| 113 | |
| 114 | //ltr |
| 115 | HB_TAG ('l', 't', 'r', 'a'), |
| 116 | HB_TAG ('l', 't', 'r', 'm'), |
| 117 | |
| 118 | //rtl |
| 119 | HB_TAG ('r', 't', 'l', 'a'), |
| 120 | HB_TAG ('r', 't', 'l', 'm'), |
| 121 | |
| 122 | //random |
| 123 | HB_TAG ('r', 'a', 'n', 'd'), |
| 124 | |
| 125 | //justify |
| 126 | HB_TAG ('j', 'a', 'l', 't'), // HarfBuzz doesn't use; others might |
| 127 | |
| 128 | //private |
| 129 | HB_TAG ('H', 'a', 'r', 'f'), |
| 130 | HB_TAG ('H', 'A', 'R', 'F'), |
| 131 | HB_TAG ('B', 'u', 'z', 'z'), |
| 132 | HB_TAG ('B', 'U', 'Z', 'Z'), |
| 133 | |
| 134 | //shapers |
| 135 | |
| 136 | //arabic |
| 137 | HB_TAG ('i', 'n', 'i', 't'), |
| 138 | HB_TAG ('m', 'e', 'd', 'i'), |
| 139 | HB_TAG ('f', 'i', 'n', 'a'), |
| 140 | HB_TAG ('i', 's', 'o', 'l'), |
| 141 | HB_TAG ('m', 'e', 'd', '2'), |
| 142 | HB_TAG ('f', 'i', 'n', '2'), |
| 143 | HB_TAG ('f', 'i', 'n', '3'), |
| 144 | HB_TAG ('c', 's', 'w', 'h'), |
| 145 | HB_TAG ('m', 's', 'e', 't'), |
| 146 | HB_TAG ('s', 't', 'c', 'h'), |
| 147 | |
| 148 | //hangul |
| 149 | HB_TAG ('l', 'j', 'm', 'o'), |
| 150 | HB_TAG ('v', 'j', 'm', 'o'), |
| 151 | HB_TAG ('t', 'j', 'm', 'o'), |
| 152 | |
| 153 | //tibetan |
| 154 | HB_TAG ('a', 'b', 'v', 's'), |
| 155 | HB_TAG ('b', 'l', 'w', 's'), |
| 156 | HB_TAG ('a', 'b', 'v', 'm'), |
| 157 | HB_TAG ('b', 'l', 'w', 'm'), |
| 158 | |
| 159 | //indic |
| 160 | HB_TAG ('n', 'u', 'k', 't'), |
| 161 | HB_TAG ('a', 'k', 'h', 'n'), |
| 162 | HB_TAG ('r', 'p', 'h', 'f'), |
| 163 | HB_TAG ('r', 'k', 'r', 'f'), |
| 164 | HB_TAG ('p', 'r', 'e', 'f'), |
| 165 | HB_TAG ('b', 'l', 'w', 'f'), |
| 166 | HB_TAG ('h', 'a', 'l', 'f'), |
| 167 | HB_TAG ('a', 'b', 'v', 'f'), |
| 168 | HB_TAG ('p', 's', 't', 'f'), |
| 169 | HB_TAG ('c', 'f', 'a', 'r'), |
| 170 | HB_TAG ('v', 'a', 't', 'u'), |
| 171 | HB_TAG ('c', 'j', 'c', 't'), |
| 172 | HB_TAG ('i', 'n', 'i', 't'), |
| 173 | HB_TAG ('p', 'r', 'e', 's'), |
| 174 | HB_TAG ('a', 'b', 'v', 's'), |
| 175 | HB_TAG ('b', 'l', 'w', 's'), |
| 176 | HB_TAG ('p', 's', 't', 's'), |
| 177 | HB_TAG ('h', 'a', 'l', 'n'), |
| 178 | HB_TAG ('d', 'i', 's', 't'), |
| 179 | HB_TAG ('a', 'b', 'v', 'm'), |
| 180 | HB_TAG ('b', 'l', 'w', 'm'), |
| 181 | }; |
| 182 | |
| 183 | sets.layout_features->add_array (default_layout_features, ARRAY_LENGTH (default_layout_features)); |
| 184 | |
| 185 | sets.layout_scripts->invert (); // Default to all scripts. |
| 186 | } |
| 187 | |
| 188 | /** |
| 189 | * hb_subset_input_create_or_fail: |
| 190 | * |
| 191 | * Creates a new subset input object. |
| 192 | * |
| 193 | * Return value: (transfer full): New subset input, or `NULL` if failed. Destroy |
| 194 | * with hb_subset_input_destroy(). |
| 195 | * |
| 196 | * Since: 1.8.0 |
| 197 | **/ |
| 198 | hb_subset_input_t * |
| 199 | hb_subset_input_create_or_fail (void) |
| 200 | { |
| 201 | hb_subset_input_t *input = hb_object_create<hb_subset_input_t>(); |
| 202 | |
| 203 | if (unlikely (!input)) |
| 204 | return nullptr; |
| 205 | |
| 206 | if (input->in_error ()) |
| 207 | { |
| 208 | hb_subset_input_destroy (input); |
| 209 | return nullptr; |
| 210 | } |
| 211 | |
| 212 | return input; |
| 213 | } |
| 214 | |
| 215 | /** |
| 216 | * hb_subset_input_reference: (skip) |
| 217 | * @input: a #hb_subset_input_t object. |
| 218 | * |
| 219 | * Increases the reference count on @input. |
| 220 | * |
| 221 | * Return value: @input. |
| 222 | * |
| 223 | * Since: 1.8.0 |
| 224 | **/ |
| 225 | hb_subset_input_t * |
| 226 | hb_subset_input_reference (hb_subset_input_t *input) |
| 227 | { |
| 228 | return hb_object_reference (input); |
| 229 | } |
| 230 | |
| 231 | /** |
| 232 | * hb_subset_input_destroy: |
| 233 | * @input: a #hb_subset_input_t object. |
| 234 | * |
| 235 | * Decreases the reference count on @input, and if it reaches zero, destroys |
| 236 | * @input, freeing all memory. |
| 237 | * |
| 238 | * Since: 1.8.0 |
| 239 | **/ |
| 240 | void |
| 241 | hb_subset_input_destroy (hb_subset_input_t *input) |
| 242 | { |
| 243 | if (!hb_object_destroy (input)) return; |
| 244 | |
| 245 | hb_free (input); |
| 246 | } |
| 247 | |
| 248 | /** |
| 249 | * hb_subset_input_unicode_set: |
| 250 | * @input: a #hb_subset_input_t object. |
| 251 | * |
| 252 | * Gets the set of Unicode code points to retain, the caller should modify the |
| 253 | * set as needed. |
| 254 | * |
| 255 | * Return value: (transfer none): pointer to the #hb_set_t of Unicode code |
| 256 | * points. |
| 257 | * |
| 258 | * Since: 1.8.0 |
| 259 | **/ |
| 260 | HB_EXTERN hb_set_t * |
| 261 | hb_subset_input_unicode_set (hb_subset_input_t *input) |
| 262 | { |
| 263 | return input->sets.unicodes; |
| 264 | } |
| 265 | |
| 266 | /** |
| 267 | * hb_subset_input_glyph_set: |
| 268 | * @input: a #hb_subset_input_t object. |
| 269 | * |
| 270 | * Gets the set of glyph IDs to retain, the caller should modify the set as |
| 271 | * needed. |
| 272 | * |
| 273 | * Return value: (transfer none): pointer to the #hb_set_t of glyph IDs. |
| 274 | * |
| 275 | * Since: 1.8.0 |
| 276 | **/ |
| 277 | HB_EXTERN hb_set_t * |
| 278 | hb_subset_input_glyph_set (hb_subset_input_t *input) |
| 279 | { |
| 280 | return input->sets.glyphs; |
| 281 | } |
| 282 | |
| 283 | /** |
| 284 | * hb_subset_input_set: |
| 285 | * @input: a #hb_subset_input_t object. |
| 286 | * @set_type: a #hb_subset_sets_t set type. |
| 287 | * |
| 288 | * Gets the set of the specified type. |
| 289 | * |
| 290 | * Return value: (transfer none): pointer to the #hb_set_t of the specified type. |
| 291 | * |
| 292 | * Since: 2.9.1 |
| 293 | **/ |
| 294 | HB_EXTERN hb_set_t * |
| 295 | hb_subset_input_set (hb_subset_input_t *input, hb_subset_sets_t set_type) |
| 296 | { |
| 297 | return input->sets_iter () [set_type]; |
| 298 | } |
| 299 | |
| 300 | /** |
| 301 | * hb_subset_input_get_flags: |
| 302 | * @input: a #hb_subset_input_t object. |
| 303 | * |
| 304 | * Gets all of the subsetting flags in the input object. |
| 305 | * |
| 306 | * Return value: the subsetting flags bit field. |
| 307 | * |
| 308 | * Since: 2.9.0 |
| 309 | **/ |
| 310 | HB_EXTERN hb_subset_flags_t |
| 311 | hb_subset_input_get_flags (hb_subset_input_t *input) |
| 312 | { |
| 313 | return (hb_subset_flags_t) input->flags; |
| 314 | } |
| 315 | |
| 316 | /** |
| 317 | * hb_subset_input_set_flags: |
| 318 | * @input: a #hb_subset_input_t object. |
| 319 | * @value: bit field of flags |
| 320 | * |
| 321 | * Sets all of the flags in the input object to the values specified by the bit |
| 322 | * field. |
| 323 | * |
| 324 | * Since: 2.9.0 |
| 325 | **/ |
| 326 | HB_EXTERN void |
| 327 | hb_subset_input_set_flags (hb_subset_input_t *input, |
| 328 | unsigned value) |
| 329 | { |
| 330 | input->flags = (hb_subset_flags_t) value; |
| 331 | } |
| 332 | |
| 333 | /** |
| 334 | * hb_subset_input_set_user_data: (skip) |
| 335 | * @input: a #hb_subset_input_t object. |
| 336 | * @key: The user-data key to set |
| 337 | * @data: A pointer to the user data |
| 338 | * @destroy: (nullable): A callback to call when @data is not needed anymore |
| 339 | * @replace: Whether to replace an existing data with the same key |
| 340 | * |
| 341 | * Attaches a user-data key/data pair to the given subset input object. |
| 342 | * |
| 343 | * Return value: `true` if success, `false` otherwise |
| 344 | * |
| 345 | * Since: 2.9.0 |
| 346 | **/ |
| 347 | hb_bool_t |
| 348 | hb_subset_input_set_user_data (hb_subset_input_t *input, |
| 349 | hb_user_data_key_t *key, |
| 350 | void * data, |
| 351 | hb_destroy_func_t destroy, |
| 352 | hb_bool_t replace) |
| 353 | { |
| 354 | return hb_object_set_user_data (input, key, data, destroy, replace); |
| 355 | } |
| 356 | |
| 357 | /** |
| 358 | * hb_subset_input_get_user_data: (skip) |
| 359 | * @input: a #hb_subset_input_t object. |
| 360 | * @key: The user-data key to query |
| 361 | * |
| 362 | * Fetches the user data associated with the specified key, |
| 363 | * attached to the specified subset input object. |
| 364 | * |
| 365 | * Return value: (transfer none): A pointer to the user data |
| 366 | * |
| 367 | * Since: 2.9.0 |
| 368 | **/ |
| 369 | void * |
| 370 | hb_subset_input_get_user_data (const hb_subset_input_t *input, |
| 371 | hb_user_data_key_t *key) |
| 372 | { |
| 373 | return hb_object_get_user_data (input, key); |
| 374 | } |
| 375 | |
| 376 | /** |
| 377 | * hb_subset_input_keep_everything: |
| 378 | * @input: a #hb_subset_input_t object |
| 379 | * |
| 380 | * Configure input object to keep everything in the font face. |
| 381 | * That is, all Unicodes, glyphs, names, layout items, |
| 382 | * glyph names, etc. |
| 383 | * |
| 384 | * The input can be tailored afterwards by the caller. |
| 385 | * |
| 386 | * Since: 7.0.0 |
| 387 | */ |
| 388 | void |
| 389 | hb_subset_input_keep_everything (hb_subset_input_t *input) |
| 390 | { |
| 391 | const hb_subset_sets_t indices[] = {HB_SUBSET_SETS_UNICODE, |
| 392 | HB_SUBSET_SETS_GLYPH_INDEX, |
| 393 | HB_SUBSET_SETS_NAME_ID, |
| 394 | HB_SUBSET_SETS_NAME_LANG_ID, |
| 395 | HB_SUBSET_SETS_LAYOUT_FEATURE_TAG, |
| 396 | HB_SUBSET_SETS_LAYOUT_SCRIPT_TAG}; |
| 397 | |
| 398 | for (auto idx : hb_iter (indices)) |
| 399 | { |
| 400 | hb_set_t *set = hb_subset_input_set (input, idx); |
| 401 | hb_set_clear (set); |
| 402 | hb_set_invert (set); |
| 403 | } |
| 404 | |
| 405 | // Don't drop any tables |
| 406 | hb_set_clear (hb_subset_input_set (input, HB_SUBSET_SETS_DROP_TABLE_TAG)); |
| 407 | |
| 408 | hb_subset_input_set_flags (input, |
| 409 | HB_SUBSET_FLAGS_NOTDEF_OUTLINE | |
| 410 | HB_SUBSET_FLAGS_GLYPH_NAMES | |
| 411 | HB_SUBSET_FLAGS_NO_PRUNE_UNICODE_RANGES | |
| 412 | HB_SUBSET_FLAGS_PASSTHROUGH_UNRECOGNIZED); |
| 413 | } |
| 414 | |
| 415 | #ifndef HB_NO_VAR |
| 416 | /** |
| 417 | * hb_subset_input_pin_axis_to_default: (skip) |
| 418 | * @input: a #hb_subset_input_t object. |
| 419 | * @face: a #hb_face_t object. |
| 420 | * @axis_tag: Tag of the axis to be pinned |
| 421 | * |
| 422 | * Pin an axis to its default location in the given subset input object. |
| 423 | * |
| 424 | * All axes in a font must be pinned. Additionally, `CFF2` table, if present, |
| 425 | * will be de-subroutinized. |
| 426 | * |
| 427 | * Return value: `true` if success, `false` otherwise |
| 428 | * |
| 429 | * Since: 6.0.0 |
| 430 | **/ |
| 431 | HB_EXTERN hb_bool_t |
| 432 | hb_subset_input_pin_axis_to_default (hb_subset_input_t *input, |
| 433 | hb_face_t *face, |
| 434 | hb_tag_t axis_tag) |
| 435 | { |
| 436 | hb_ot_var_axis_info_t axis_info; |
| 437 | if (!hb_ot_var_find_axis_info (face, axis_tag, &axis_info)) |
| 438 | return false; |
| 439 | |
| 440 | float default_val = axis_info.default_value; |
| 441 | return input->axes_location.set (axis_tag, Triple (default_val, default_val, default_val)); |
| 442 | } |
| 443 | |
| 444 | /** |
| 445 | * hb_subset_input_pin_axis_location: (skip) |
| 446 | * @input: a #hb_subset_input_t object. |
| 447 | * @face: a #hb_face_t object. |
| 448 | * @axis_tag: Tag of the axis to be pinned |
| 449 | * @axis_value: Location on the axis to be pinned at |
| 450 | * |
| 451 | * Pin an axis to a fixed location in the given subset input object. |
| 452 | * |
| 453 | * All axes in a font must be pinned. Additionally, `CFF2` table, if present, |
| 454 | * will be de-subroutinized. |
| 455 | * |
| 456 | * Return value: `true` if success, `false` otherwise |
| 457 | * |
| 458 | * Since: 6.0.0 |
| 459 | **/ |
| 460 | HB_EXTERN hb_bool_t |
| 461 | hb_subset_input_pin_axis_location (hb_subset_input_t *input, |
| 462 | hb_face_t *face, |
| 463 | hb_tag_t axis_tag, |
| 464 | float axis_value) |
| 465 | { |
| 466 | hb_ot_var_axis_info_t axis_info; |
| 467 | if (!hb_ot_var_find_axis_info (face, axis_tag, &axis_info)) |
| 468 | return false; |
| 469 | |
| 470 | float val = hb_clamp(axis_value, axis_info.min_value, axis_info.max_value); |
| 471 | return input->axes_location.set (axis_tag, Triple (val, val, val)); |
| 472 | } |
| 473 | |
| 474 | #ifdef HB_EXPERIMENTAL_API |
| 475 | /** |
| 476 | * hb_subset_input_set_axis_range: (skip) |
| 477 | * @input: a #hb_subset_input_t object. |
| 478 | * @face: a #hb_face_t object. |
| 479 | * @axis_tag: Tag of the axis |
| 480 | * @axis_min_value: Minimum value of the axis variation range to set |
| 481 | * @axis_max_value: Maximum value of the axis variation range to set |
| 482 | * |
| 483 | * Restricting the range of variation on an axis in the given subset input object. |
| 484 | * New min/max values will be clamped if they're not within the fvar axis range. |
| 485 | * If the fvar axis default value is not within the new range, the new default |
| 486 | * value will be changed to the new min or max value, whichever is closer to the fvar |
| 487 | * axis default. |
| 488 | * |
| 489 | * Note: input min value can not be bigger than input max value |
| 490 | * Note: currently this API does not support changing axis limits yet.It'd be only |
| 491 | * used internally for setting axis limits in the internal data structures |
| 492 | * |
| 493 | * Return value: `true` if success, `false` otherwise |
| 494 | * |
| 495 | * XSince: EXPERIMENTAL |
| 496 | **/ |
| 497 | HB_EXTERN hb_bool_t |
| 498 | hb_subset_input_set_axis_range (hb_subset_input_t *input, |
| 499 | hb_face_t *face, |
| 500 | hb_tag_t axis_tag, |
| 501 | float axis_min_value, |
| 502 | float axis_max_value) |
| 503 | { |
| 504 | if (axis_min_value > axis_max_value) |
| 505 | return false; |
| 506 | |
| 507 | hb_ot_var_axis_info_t axis_info; |
| 508 | if (!hb_ot_var_find_axis_info (face, axis_tag, &axis_info)) |
| 509 | return false; |
| 510 | |
| 511 | float new_min_val = hb_clamp(axis_min_value, axis_info.min_value, axis_info.max_value); |
| 512 | float new_max_val = hb_clamp(axis_max_value, axis_info.min_value, axis_info.max_value); |
| 513 | float new_default_val = hb_clamp(axis_info.default_value, new_min_val, new_max_val); |
| 514 | return input->axes_location.set (axis_tag, Triple (new_min_val, new_default_val, new_max_val)); |
| 515 | } |
| 516 | #endif |
| 517 | #endif |
| 518 | |
| 519 | /** |
| 520 | * hb_subset_preprocess: |
| 521 | * @source: a #hb_face_t object. |
| 522 | * |
| 523 | * Preprocesses the face and attaches data that will be needed by the |
| 524 | * subsetter. Future subsetting operations can then use the precomputed data |
| 525 | * to speed up the subsetting operation. |
| 526 | * |
| 527 | * See [subset-preprocessing](https://github.com/harfbuzz/harfbuzz/blob/main/docs/subset-preprocessing.md) |
| 528 | * for more information. |
| 529 | * |
| 530 | * Note: the preprocessed face may contain sub-blobs that reference the memory |
| 531 | * backing the source #hb_face_t. Therefore in the case that this memory is not |
| 532 | * owned by the source face you will need to ensure that memory lives |
| 533 | * as long as the returned #hb_face_t. |
| 534 | * |
| 535 | * Returns: a new #hb_face_t. |
| 536 | * |
| 537 | * Since: 6.0.0 |
| 538 | **/ |
| 539 | |
| 540 | HB_EXTERN hb_face_t * |
| 541 | hb_subset_preprocess (hb_face_t *source) |
| 542 | { |
| 543 | hb_subset_input_t* input = hb_subset_input_create_or_fail (); |
| 544 | if (!input) |
| 545 | return hb_face_reference (source); |
| 546 | |
| 547 | hb_subset_input_keep_everything (input); |
| 548 | |
| 549 | input->attach_accelerator_data = true; |
| 550 | |
| 551 | // Always use long loca in the preprocessed version. This allows |
| 552 | // us to store the glyph bytes unpadded which allows the future subset |
| 553 | // operation to run faster by skipping the trim padding step. |
| 554 | input->force_long_loca = true; |
| 555 | |
| 556 | hb_face_t* new_source = hb_subset_or_fail (source, input); |
| 557 | hb_subset_input_destroy (input); |
| 558 | |
| 559 | if (!new_source) { |
| 560 | DEBUG_MSG (SUBSET, nullptr, "Preprocessing failed due to subset failure." ); |
| 561 | return hb_face_reference (source); |
| 562 | } |
| 563 | |
| 564 | return new_source; |
| 565 | } |
| 566 | |
| 567 | /** |
| 568 | * hb_subset_input_old_to_new_glyph_mapping: |
| 569 | * @input: a #hb_subset_input_t object. |
| 570 | * |
| 571 | * Returns a map which can be used to provide an explicit mapping from old to new glyph |
| 572 | * id's in the produced subset. The caller should populate the map as desired. |
| 573 | * If this map is left empty then glyph ids will be automatically mapped to new |
| 574 | * values by the subsetter. If populated, the mapping must be unique. That |
| 575 | * is no two original glyph ids can be mapped to the same new id. |
| 576 | * Additionally, if a mapping is provided then the retain gids option cannot |
| 577 | * be enabled. |
| 578 | * |
| 579 | * Any glyphs that are retained in the subset which are not specified |
| 580 | * in this mapping will be assigned glyph ids after the highest glyph |
| 581 | * id in the mapping. |
| 582 | * |
| 583 | * Note: this will accept and apply non-monotonic mappings, however this |
| 584 | * may result in unsorted Coverage tables. Such fonts may not work for all |
| 585 | * use cases (for example ots will reject unsorted coverage tables). So it's |
| 586 | * recommended, if possible, to supply a monotonic mapping. |
| 587 | * |
| 588 | * Return value: (transfer none): pointer to the #hb_map_t of the custom glyphs ID map. |
| 589 | * |
| 590 | * Since: 7.3.0 |
| 591 | **/ |
| 592 | HB_EXTERN hb_map_t* |
| 593 | hb_subset_input_old_to_new_glyph_mapping (hb_subset_input_t *input) |
| 594 | { |
| 595 | return &input->glyph_map; |
| 596 | } |
| 597 | |
| 598 | #ifdef HB_EXPERIMENTAL_API |
| 599 | /** |
| 600 | * hb_subset_input_override_name_table: |
| 601 | * @input: a #hb_subset_input_t object. |
| 602 | * @name_id: name_id of a nameRecord |
| 603 | * @platform_id: platform ID of a nameRecord |
| 604 | * @encoding_id: encoding ID of a nameRecord |
| 605 | * @language_id: language ID of a nameRecord |
| 606 | * @name_str: pointer to name string new value or null to indicate should remove |
| 607 | * @str_len: the size of @name_str, or -1 if it is `NULL`-terminated |
| 608 | * |
| 609 | * Override the name string of the NameRecord identified by name_id, |
| 610 | * platform_id, encoding_id and language_id. If a record with that name_id |
| 611 | * doesn't exist, create it and insert to the name table. |
| 612 | * |
| 613 | * Note: for mac platform, we only support name_str with all ascii characters, |
| 614 | * name_str with non-ascii characters will be ignored. |
| 615 | * |
| 616 | * XSince: EXPERIMENTAL |
| 617 | **/ |
| 618 | HB_EXTERN hb_bool_t |
| 619 | hb_subset_input_override_name_table (hb_subset_input_t *input, |
| 620 | hb_ot_name_id_t name_id, |
| 621 | unsigned platform_id, |
| 622 | unsigned encoding_id, |
| 623 | unsigned language_id, |
| 624 | const char *name_str, |
| 625 | int str_len /* -1 means nul-terminated */) |
| 626 | { |
| 627 | if (!name_str) |
| 628 | { |
| 629 | str_len = 0; |
| 630 | } |
| 631 | else if (str_len == -1) |
| 632 | { |
| 633 | str_len = strlen (name_str); |
| 634 | } |
| 635 | |
| 636 | hb_bytes_t name_bytes (nullptr, 0); |
| 637 | if (str_len) |
| 638 | { |
| 639 | if (platform_id == 1) |
| 640 | { |
| 641 | const uint8_t *src = reinterpret_cast<const uint8_t*> (name_str); |
| 642 | const uint8_t *src_end = src + str_len; |
| 643 | |
| 644 | hb_codepoint_t unicode; |
| 645 | const hb_codepoint_t replacement = HB_BUFFER_REPLACEMENT_CODEPOINT_DEFAULT; |
| 646 | while (src < src_end) |
| 647 | { |
| 648 | src = hb_utf8_t::next (src, src_end, &unicode, replacement); |
| 649 | if (unicode >= 0x0080u) |
| 650 | { |
| 651 | printf ("Non-ascii character detected, ignored...This API supports acsii characters only for mac platform\n" ); |
| 652 | return false; |
| 653 | } |
| 654 | } |
| 655 | } |
| 656 | char *override_name = (char *) hb_malloc (str_len); |
| 657 | if (unlikely (!override_name)) return false; |
| 658 | |
| 659 | hb_memcpy (override_name, name_str, str_len); |
| 660 | name_bytes = hb_bytes_t (override_name, str_len); |
| 661 | } |
| 662 | input->name_table_overrides.set (hb_ot_name_record_ids_t (platform_id, encoding_id, language_id, name_id), name_bytes); |
| 663 | return true; |
| 664 | } |
| 665 | |
| 666 | #endif |
| 667 | |