DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Header

Mercurial (56e7b9127e89)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514
/*
 * Copyright © 2009  Red Hat, Inc.
 * Copyright © 2012  Google, Inc.
 *
 *  This is part of HarfBuzz, a text shaping library.
 *
 * Permission is hereby granted, without written agreement and without
 * license or royalty fees, to use, copy, modify, and distribute this
 * software and its documentation for any purpose, provided that the
 * above copyright notice and the following two paragraphs appear in
 * all copies of this software.
 *
 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 *
 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
 *
 * Red Hat Author(s): Behdad Esfahbod
 * Google Author(s): Behdad Esfahbod
 */

#include "hb-private.hh"

#include "hb-face-private.hh"
#include "hb-blob-private.hh"
#include "hb-open-file-private.hh"


/**
 * hb_face_count: Get number of faces on the blob
 * @blob:
 *
 *
 *
 * Return value: Number of faces on the blob
 *
 * Since: 1.7.7
 **/
unsigned int
hb_face_count (hb_blob_t *blob)
{
  if (unlikely (!blob))
    return 0;

  /* TODO We shouldn't be sanitizing blob.  Port to run sanitizer and return if not sane. */
  /* Make API signature const after. */
  hb_blob_t *sanitized = hb_sanitize_context_t ().sanitize_blob<OT::OpenTypeFontFile> (hb_blob_reference (blob));
  const OT::OpenTypeFontFile& ot = *sanitized->as<OT::OpenTypeFontFile> ();
  unsigned int ret = ot.get_face_count ();
  hb_blob_destroy (sanitized);

  return ret;
}

/*
 * hb_face_t
 */

DEFINE_NULL_INSTANCE (hb_face_t) =
{
  HB_OBJECT_HEADER_STATIC,

  true, /* immutable */

  nullptr, /* reference_table_func */
  nullptr, /* user_data */
  nullptr, /* destroy */

  0,    /* index */
  1000, /* upem */
  0,    /* num_glyphs */

  {
#define HB_SHAPER_IMPLEMENT(shaper) HB_ATOMIC_PTR_INIT (HB_SHAPER_DATA_INVALID),
#include "hb-shaper-list.hh"
#undef HB_SHAPER_IMPLEMENT
  },

  HB_ATOMIC_PTR_INIT (nullptr), /* shape_plans */
};


/**
 * hb_face_create_for_tables:
 * @reference_table_func: (closure user_data) (destroy destroy) (scope notified):
 * @user_data:
 * @destroy:
 *
 *
 *
 * Return value: (transfer full)
 *
 * Since: 0.9.2
 **/
hb_face_t *
hb_face_create_for_tables (hb_reference_table_func_t  reference_table_func,
			   void                      *user_data,
			   hb_destroy_func_t          destroy)
{
  hb_face_t *face;

  if (!reference_table_func || !(face = hb_object_create<hb_face_t> ())) {
    if (destroy)
      destroy (user_data);
    return hb_face_get_empty ();
  }

  face->reference_table_func = reference_table_func;
  face->user_data = user_data;
  face->destroy = destroy;

  face->upem = 0;
  face->num_glyphs = (unsigned int) -1;

  return face;
}


typedef struct hb_face_for_data_closure_t {
  hb_blob_t *blob;
  unsigned int  index;
} hb_face_for_data_closure_t;

static hb_face_for_data_closure_t *
_hb_face_for_data_closure_create (hb_blob_t *blob, unsigned int index)
{
  hb_face_for_data_closure_t *closure;

  closure = (hb_face_for_data_closure_t *) calloc (1, sizeof (hb_face_for_data_closure_t));
  if (unlikely (!closure))
    return nullptr;

  closure->blob = blob;
  closure->index = index;

  return closure;
}

static void
_hb_face_for_data_closure_destroy (void *data)
{
  hb_face_for_data_closure_t *closure = (hb_face_for_data_closure_t *) data;

  hb_blob_destroy (closure->blob);
  free (closure);
}

static hb_blob_t *
_hb_face_for_data_reference_table (hb_face_t *face HB_UNUSED, hb_tag_t tag, void *user_data)
{
  hb_face_for_data_closure_t *data = (hb_face_for_data_closure_t *) user_data;

  if (tag == HB_TAG_NONE)
    return hb_blob_reference (data->blob);

  const OT::OpenTypeFontFile &ot_file = *data->blob->as<OT::OpenTypeFontFile> ();
  const OT::OpenTypeFontFace &ot_face = ot_file.get_face (data->index);

  const OT::OpenTypeTable &table = ot_face.get_table_by_tag (tag);

  hb_blob_t *blob = hb_blob_create_sub_blob (data->blob, table.offset, table.length);

  return blob;
}

/**
 * hb_face_create: (Xconstructor)
 * @blob:
 * @index:
 *
 *
 *
 * Return value: (transfer full):
 *
 * Since: 0.9.2
 **/
hb_face_t *
hb_face_create (hb_blob_t    *blob,
		unsigned int  index)
{
  hb_face_t *face;

  if (unlikely (!blob))
    blob = hb_blob_get_empty ();

  hb_face_for_data_closure_t *closure = _hb_face_for_data_closure_create (hb_sanitize_context_t ().sanitize_blob<OT::OpenTypeFontFile> (hb_blob_reference (blob)), index);

  if (unlikely (!closure))
    return hb_face_get_empty ();

  face = hb_face_create_for_tables (_hb_face_for_data_reference_table,
				    closure,
				    _hb_face_for_data_closure_destroy);

  face->index = index;

  return face;
}

/**
 * hb_face_get_empty:
 *
 *
 *
 * Return value: (transfer full)
 *
 * Since: 0.9.2
 **/
hb_face_t *
hb_face_get_empty (void)
{
  return const_cast<hb_face_t *> (&Null(hb_face_t));
}


/**
 * hb_face_reference: (skip)
 * @face: a face.
 *
 *
 *
 * Return value:
 *
 * Since: 0.9.2
 **/
hb_face_t *
hb_face_reference (hb_face_t *face)
{
  return hb_object_reference (face);
}

/**
 * hb_face_destroy: (skip)
 * @face: a face.
 *
 *
 *
 * Since: 0.9.2
 **/
void
hb_face_destroy (hb_face_t *face)
{
  if (!hb_object_destroy (face)) return;

  for (hb_face_t::plan_node_t *node = face->shape_plans.get (); node; )
  {
    hb_face_t::plan_node_t *next = node->next;
    hb_shape_plan_destroy (node->shape_plan);
    free (node);
    node = next;
  }

#define HB_SHAPER_IMPLEMENT(shaper) HB_SHAPER_DATA_DESTROY(shaper, face);
#include "hb-shaper-list.hh"
#undef HB_SHAPER_IMPLEMENT

  if (face->destroy)
    face->destroy (face->user_data);

  free (face);
}

/**
 * hb_face_set_user_data: (skip)
 * @face: a face.
 * @key:
 * @data:
 * @destroy:
 * @replace:
 *
 *
 *
 * Return value:
 *
 * Since: 0.9.2
 **/
hb_bool_t
hb_face_set_user_data (hb_face_t          *face,
		       hb_user_data_key_t *key,
		       void *              data,
		       hb_destroy_func_t   destroy,
		       hb_bool_t           replace)
{
  return hb_object_set_user_data (face, key, data, destroy, replace);
}

/**
 * hb_face_get_user_data: (skip)
 * @face: a face.
 * @key:
 *
 *
 *
 * Return value: (transfer none):
 *
 * Since: 0.9.2
 **/
void *
hb_face_get_user_data (const hb_face_t    *face,
		       hb_user_data_key_t *key)
{
  return hb_object_get_user_data (face, key);
}

/**
 * hb_face_make_immutable:
 * @face: a face.
 *
 *
 *
 * Since: 0.9.2
 **/
void
hb_face_make_immutable (hb_face_t *face)
{
  if (unlikely (hb_object_is_inert (face)))
    return;

  face->immutable = true;
}

/**
 * hb_face_is_immutable:
 * @face: a face.
 *
 *
 *
 * Return value:
 *
 * Since: 0.9.2
 **/
hb_bool_t
hb_face_is_immutable (const hb_face_t *face)
{
  return face->immutable;
}


/**
 * hb_face_reference_table:
 * @face: a face.
 * @tag:
 *
 *
 *
 * Return value: (transfer full):
 *
 * Since: 0.9.2
 **/
hb_blob_t *
hb_face_reference_table (const hb_face_t *face,
			 hb_tag_t tag)
{
  return face->reference_table (tag);
}

/**
 * hb_face_reference_blob:
 * @face: a face.
 *
 *
 *
 * Return value: (transfer full):
 *
 * Since: 0.9.2
 **/
hb_blob_t *
hb_face_reference_blob (hb_face_t *face)
{
  return face->reference_table (HB_TAG_NONE);
}

/**
 * hb_face_set_index:
 * @face: a face.
 * @index:
 *
 *
 *
 * Since: 0.9.2
 **/
void
hb_face_set_index (hb_face_t    *face,
		   unsigned int  index)
{
  if (face->immutable)
    return;

  face->index = index;
}

/**
 * hb_face_get_index:
 * @face: a face.
 *
 *
 *
 * Return value:
 *
 * Since: 0.9.2
 **/
unsigned int
hb_face_get_index (const hb_face_t *face)
{
  return face->index;
}

/**
 * hb_face_set_upem:
 * @face: a face.
 * @upem:
 *
 *
 *
 * Since: 0.9.2
 **/
void
hb_face_set_upem (hb_face_t    *face,
		  unsigned int  upem)
{
  if (face->immutable)
    return;

  face->upem = upem;
}

/**
 * hb_face_get_upem:
 * @face: a face.
 *
 *
 *
 * Return value:
 *
 * Since: 0.9.2
 **/
unsigned int
hb_face_get_upem (const hb_face_t *face)
{
  return face->get_upem ();
}

/**
 * hb_face_set_glyph_count:
 * @face: a face.
 * @glyph_count:
 *
 *
 *
 * Since: 0.9.7
 **/
void
hb_face_set_glyph_count (hb_face_t    *face,
			 unsigned int  glyph_count)
{
  if (face->immutable)
    return;

  face->num_glyphs = glyph_count;
}

/**
 * hb_face_get_glyph_count:
 * @face: a face.
 *
 *
 *
 * Return value:
 *
 * Since: 0.9.7
 **/
unsigned int
hb_face_get_glyph_count (const hb_face_t *face)
{
  return face->get_num_glyphs ();
}

/**
 * hb_face_get_table_tags:
 * @face: a face.
 *
 * Retrieves table tags for a face, if possible.
 *
 * Return value: total number of tables, or 0 if not possible to list.
 *
 * Since: 1.6.0
 **/
unsigned int
hb_face_get_table_tags (const hb_face_t *face,
			unsigned int  start_offset,
			unsigned int *table_count, /* IN/OUT */
			hb_tag_t     *table_tags /* OUT */)
{
  if (face->destroy != (hb_destroy_func_t) _hb_face_for_data_closure_destroy)
  {
    if (table_count)
      *table_count = 0;
    return 0;
  }

  hb_face_for_data_closure_t *data = (hb_face_for_data_closure_t *) face->user_data;

  const OT::OpenTypeFontFile &ot_file = *data->blob->as<OT::OpenTypeFontFile> ();
  const OT::OpenTypeFontFace &ot_face = ot_file.get_face (data->index);

  return ot_face.get_table_tags (start_offset, table_count, table_tags);
}