1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/harfbuzz/src/hb-face.cc Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,481 @@
1.4 +/*
1.5 + * Copyright © 2009 Red Hat, Inc.
1.6 + * Copyright © 2012 Google, Inc.
1.7 + *
1.8 + * This is part of HarfBuzz, a text shaping library.
1.9 + *
1.10 + * Permission is hereby granted, without written agreement and without
1.11 + * license or royalty fees, to use, copy, modify, and distribute this
1.12 + * software and its documentation for any purpose, provided that the
1.13 + * above copyright notice and the following two paragraphs appear in
1.14 + * all copies of this software.
1.15 + *
1.16 + * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
1.17 + * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
1.18 + * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
1.19 + * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
1.20 + * DAMAGE.
1.21 + *
1.22 + * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
1.23 + * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
1.24 + * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
1.25 + * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
1.26 + * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
1.27 + *
1.28 + * Red Hat Author(s): Behdad Esfahbod
1.29 + * Google Author(s): Behdad Esfahbod
1.30 + */
1.31 +
1.32 +#include "hb-private.hh"
1.33 +
1.34 +#include "hb-ot-layout-private.hh"
1.35 +
1.36 +#include "hb-font-private.hh"
1.37 +#include "hb-open-file-private.hh"
1.38 +#include "hb-ot-head-table.hh"
1.39 +#include "hb-ot-maxp-table.hh"
1.40 +
1.41 +#include "hb-cache-private.hh"
1.42 +
1.43 +#include <string.h>
1.44 +
1.45 +
1.46 +/*
1.47 + * hb_face_t
1.48 + */
1.49 +
1.50 +const hb_face_t _hb_face_nil = {
1.51 + HB_OBJECT_HEADER_STATIC,
1.52 +
1.53 + true, /* immutable */
1.54 +
1.55 + NULL, /* reference_table_func */
1.56 + NULL, /* user_data */
1.57 + NULL, /* destroy */
1.58 +
1.59 + 0, /* index */
1.60 + 1000, /* upem */
1.61 + 0, /* num_glyphs */
1.62 +
1.63 + {
1.64 +#define HB_SHAPER_IMPLEMENT(shaper) HB_SHAPER_DATA_INVALID,
1.65 +#include "hb-shaper-list.hh"
1.66 +#undef HB_SHAPER_IMPLEMENT
1.67 + },
1.68 +
1.69 + NULL, /* shape_plans */
1.70 +};
1.71 +
1.72 +
1.73 +/**
1.74 + * hb_face_create_for_tables:
1.75 + * @reference_table_func: (closure user_data) (destroy destroy) (scope notified):
1.76 + * @user_data:
1.77 + * @destroy:
1.78 + *
1.79 + *
1.80 + *
1.81 + * Return value: (transfer full)
1.82 + *
1.83 + * Since: 1.0
1.84 + **/
1.85 +hb_face_t *
1.86 +hb_face_create_for_tables (hb_reference_table_func_t reference_table_func,
1.87 + void *user_data,
1.88 + hb_destroy_func_t destroy)
1.89 +{
1.90 + hb_face_t *face;
1.91 +
1.92 + if (!reference_table_func || !(face = hb_object_create<hb_face_t> ())) {
1.93 + if (destroy)
1.94 + destroy (user_data);
1.95 + return hb_face_get_empty ();
1.96 + }
1.97 +
1.98 + face->reference_table_func = reference_table_func;
1.99 + face->user_data = user_data;
1.100 + face->destroy = destroy;
1.101 +
1.102 + face->upem = 0;
1.103 + face->num_glyphs = (unsigned int) -1;
1.104 +
1.105 + return face;
1.106 +}
1.107 +
1.108 +
1.109 +typedef struct hb_face_for_data_closure_t {
1.110 + hb_blob_t *blob;
1.111 + unsigned int index;
1.112 +} hb_face_for_data_closure_t;
1.113 +
1.114 +static hb_face_for_data_closure_t *
1.115 +_hb_face_for_data_closure_create (hb_blob_t *blob, unsigned int index)
1.116 +{
1.117 + hb_face_for_data_closure_t *closure;
1.118 +
1.119 + closure = (hb_face_for_data_closure_t *) malloc (sizeof (hb_face_for_data_closure_t));
1.120 + if (unlikely (!closure))
1.121 + return NULL;
1.122 +
1.123 + closure->blob = blob;
1.124 + closure->index = index;
1.125 +
1.126 + return closure;
1.127 +}
1.128 +
1.129 +static void
1.130 +_hb_face_for_data_closure_destroy (hb_face_for_data_closure_t *closure)
1.131 +{
1.132 + hb_blob_destroy (closure->blob);
1.133 + free (closure);
1.134 +}
1.135 +
1.136 +static hb_blob_t *
1.137 +_hb_face_for_data_reference_table (hb_face_t *face HB_UNUSED, hb_tag_t tag, void *user_data)
1.138 +{
1.139 + hb_face_for_data_closure_t *data = (hb_face_for_data_closure_t *) user_data;
1.140 +
1.141 + if (tag == HB_TAG_NONE)
1.142 + return hb_blob_reference (data->blob);
1.143 +
1.144 + const OT::OpenTypeFontFile &ot_file = *OT::Sanitizer<OT::OpenTypeFontFile>::lock_instance (data->blob);
1.145 + const OT::OpenTypeFontFace &ot_face = ot_file.get_face (data->index);
1.146 +
1.147 + const OT::OpenTypeTable &table = ot_face.get_table_by_tag (tag);
1.148 +
1.149 + hb_blob_t *blob = hb_blob_create_sub_blob (data->blob, table.offset, table.length);
1.150 +
1.151 + return blob;
1.152 +}
1.153 +
1.154 +/**
1.155 + * hb_face_create: (Xconstructor)
1.156 + * @blob:
1.157 + * @index:
1.158 + *
1.159 + *
1.160 + *
1.161 + * Return value: (transfer full):
1.162 + *
1.163 + * Since: 1.0
1.164 + **/
1.165 +hb_face_t *
1.166 +hb_face_create (hb_blob_t *blob,
1.167 + unsigned int index)
1.168 +{
1.169 + hb_face_t *face;
1.170 +
1.171 + if (unlikely (!blob || !hb_blob_get_length (blob)))
1.172 + return hb_face_get_empty ();
1.173 +
1.174 + hb_face_for_data_closure_t *closure = _hb_face_for_data_closure_create (OT::Sanitizer<OT::OpenTypeFontFile>::sanitize (hb_blob_reference (blob)), index);
1.175 +
1.176 + if (unlikely (!closure))
1.177 + return hb_face_get_empty ();
1.178 +
1.179 + face = hb_face_create_for_tables (_hb_face_for_data_reference_table,
1.180 + closure,
1.181 + (hb_destroy_func_t) _hb_face_for_data_closure_destroy);
1.182 +
1.183 + hb_face_set_index (face, index);
1.184 +
1.185 + return face;
1.186 +}
1.187 +
1.188 +/**
1.189 + * hb_face_get_empty:
1.190 + *
1.191 + *
1.192 + *
1.193 + * Return value: (transfer full)
1.194 + *
1.195 + * Since: 1.0
1.196 + **/
1.197 +hb_face_t *
1.198 +hb_face_get_empty (void)
1.199 +{
1.200 + return const_cast<hb_face_t *> (&_hb_face_nil);
1.201 +}
1.202 +
1.203 +
1.204 +/**
1.205 + * hb_face_reference: (skip)
1.206 + * @face: a face.
1.207 + *
1.208 + *
1.209 + *
1.210 + * Return value:
1.211 + *
1.212 + * Since: 1.0
1.213 + **/
1.214 +hb_face_t *
1.215 +hb_face_reference (hb_face_t *face)
1.216 +{
1.217 + return hb_object_reference (face);
1.218 +}
1.219 +
1.220 +/**
1.221 + * hb_face_destroy: (skip)
1.222 + * @face: a face.
1.223 + *
1.224 + *
1.225 + *
1.226 + * Since: 1.0
1.227 + **/
1.228 +void
1.229 +hb_face_destroy (hb_face_t *face)
1.230 +{
1.231 + if (!hb_object_destroy (face)) return;
1.232 +
1.233 + for (hb_face_t::plan_node_t *node = face->shape_plans; node; )
1.234 + {
1.235 + hb_face_t::plan_node_t *next = node->next;
1.236 + hb_shape_plan_destroy (node->shape_plan);
1.237 + free (node);
1.238 + node = next;
1.239 + }
1.240 +
1.241 +#define HB_SHAPER_IMPLEMENT(shaper) HB_SHAPER_DATA_DESTROY(shaper, face);
1.242 +#include "hb-shaper-list.hh"
1.243 +#undef HB_SHAPER_IMPLEMENT
1.244 +
1.245 + if (face->destroy)
1.246 + face->destroy (face->user_data);
1.247 +
1.248 + free (face);
1.249 +}
1.250 +
1.251 +/**
1.252 + * hb_face_set_user_data: (skip)
1.253 + * @face: a face.
1.254 + * @key:
1.255 + * @data:
1.256 + * @destroy:
1.257 + * @replace:
1.258 + *
1.259 + *
1.260 + *
1.261 + * Return value:
1.262 + *
1.263 + * Since: 1.0
1.264 + **/
1.265 +hb_bool_t
1.266 +hb_face_set_user_data (hb_face_t *face,
1.267 + hb_user_data_key_t *key,
1.268 + void * data,
1.269 + hb_destroy_func_t destroy,
1.270 + hb_bool_t replace)
1.271 +{
1.272 + return hb_object_set_user_data (face, key, data, destroy, replace);
1.273 +}
1.274 +
1.275 +/**
1.276 + * hb_face_get_user_data: (skip)
1.277 + * @face: a face.
1.278 + * @key:
1.279 + *
1.280 + *
1.281 + *
1.282 + * Return value: (transfer none):
1.283 + *
1.284 + * Since: 1.0
1.285 + **/
1.286 +void *
1.287 +hb_face_get_user_data (hb_face_t *face,
1.288 + hb_user_data_key_t *key)
1.289 +{
1.290 + return hb_object_get_user_data (face, key);
1.291 +}
1.292 +
1.293 +/**
1.294 + * hb_face_make_immutable:
1.295 + * @face: a face.
1.296 + *
1.297 + *
1.298 + *
1.299 + * Since: 1.0
1.300 + **/
1.301 +void
1.302 +hb_face_make_immutable (hb_face_t *face)
1.303 +{
1.304 + if (hb_object_is_inert (face))
1.305 + return;
1.306 +
1.307 + face->immutable = true;
1.308 +}
1.309 +
1.310 +/**
1.311 + * hb_face_is_immutable:
1.312 + * @face: a face.
1.313 + *
1.314 + *
1.315 + *
1.316 + * Return value:
1.317 + *
1.318 + * Since: 1.0
1.319 + **/
1.320 +hb_bool_t
1.321 +hb_face_is_immutable (hb_face_t *face)
1.322 +{
1.323 + return face->immutable;
1.324 +}
1.325 +
1.326 +
1.327 +/**
1.328 + * hb_face_reference_table:
1.329 + * @face: a face.
1.330 + * @tag:
1.331 + *
1.332 + *
1.333 + *
1.334 + * Return value: (transfer full):
1.335 + *
1.336 + * Since: 1.0
1.337 + **/
1.338 +hb_blob_t *
1.339 +hb_face_reference_table (hb_face_t *face,
1.340 + hb_tag_t tag)
1.341 +{
1.342 + return face->reference_table (tag);
1.343 +}
1.344 +
1.345 +/**
1.346 + * hb_face_reference_blob:
1.347 + * @face: a face.
1.348 + *
1.349 + *
1.350 + *
1.351 + * Return value: (transfer full):
1.352 + *
1.353 + * Since: 1.0
1.354 + **/
1.355 +hb_blob_t *
1.356 +hb_face_reference_blob (hb_face_t *face)
1.357 +{
1.358 + return face->reference_table (HB_TAG_NONE);
1.359 +}
1.360 +
1.361 +/**
1.362 + * hb_face_set_index:
1.363 + * @face: a face.
1.364 + * @index:
1.365 + *
1.366 + *
1.367 + *
1.368 + * Since: 1.0
1.369 + **/
1.370 +void
1.371 +hb_face_set_index (hb_face_t *face,
1.372 + unsigned int index)
1.373 +{
1.374 + if (hb_object_is_inert (face))
1.375 + return;
1.376 +
1.377 + face->index = index;
1.378 +}
1.379 +
1.380 +/**
1.381 + * hb_face_get_index:
1.382 + * @face: a face.
1.383 + *
1.384 + *
1.385 + *
1.386 + * Return value:
1.387 + *
1.388 + * Since: 1.0
1.389 + **/
1.390 +unsigned int
1.391 +hb_face_get_index (hb_face_t *face)
1.392 +{
1.393 + return face->index;
1.394 +}
1.395 +
1.396 +/**
1.397 + * hb_face_set_upem:
1.398 + * @face: a face.
1.399 + * @upem:
1.400 + *
1.401 + *
1.402 + *
1.403 + * Since: 1.0
1.404 + **/
1.405 +void
1.406 +hb_face_set_upem (hb_face_t *face,
1.407 + unsigned int upem)
1.408 +{
1.409 + if (hb_object_is_inert (face))
1.410 + return;
1.411 +
1.412 + face->upem = upem;
1.413 +}
1.414 +
1.415 +/**
1.416 + * hb_face_get_upem:
1.417 + * @face: a face.
1.418 + *
1.419 + *
1.420 + *
1.421 + * Return value:
1.422 + *
1.423 + * Since: 1.0
1.424 + **/
1.425 +unsigned int
1.426 +hb_face_get_upem (hb_face_t *face)
1.427 +{
1.428 + return face->get_upem ();
1.429 +}
1.430 +
1.431 +void
1.432 +hb_face_t::load_upem (void) const
1.433 +{
1.434 + hb_blob_t *head_blob = OT::Sanitizer<OT::head>::sanitize (reference_table (HB_OT_TAG_head));
1.435 + const OT::head *head_table = OT::Sanitizer<OT::head>::lock_instance (head_blob);
1.436 + upem = head_table->get_upem ();
1.437 + hb_blob_destroy (head_blob);
1.438 +}
1.439 +
1.440 +/**
1.441 + * hb_face_set_glyph_count:
1.442 + * @face: a face.
1.443 + * @glyph_count:
1.444 + *
1.445 + *
1.446 + *
1.447 + * Since: 1.0
1.448 + **/
1.449 +void
1.450 +hb_face_set_glyph_count (hb_face_t *face,
1.451 + unsigned int glyph_count)
1.452 +{
1.453 + if (hb_object_is_inert (face))
1.454 + return;
1.455 +
1.456 + face->num_glyphs = glyph_count;
1.457 +}
1.458 +
1.459 +/**
1.460 + * hb_face_get_glyph_count:
1.461 + * @face: a face.
1.462 + *
1.463 + *
1.464 + *
1.465 + * Return value:
1.466 + *
1.467 + * Since: 1.0
1.468 + **/
1.469 +unsigned int
1.470 +hb_face_get_glyph_count (hb_face_t *face)
1.471 +{
1.472 + return face->get_num_glyphs ();
1.473 +}
1.474 +
1.475 +void
1.476 +hb_face_t::load_num_glyphs (void) const
1.477 +{
1.478 + hb_blob_t *maxp_blob = OT::Sanitizer<OT::maxp>::sanitize (reference_table (HB_OT_TAG_maxp));
1.479 + const OT::maxp *maxp_table = OT::Sanitizer<OT::maxp>::lock_instance (maxp_blob);
1.480 + num_glyphs = maxp_table->get_num_glyphs ();
1.481 + hb_blob_destroy (maxp_blob);
1.482 +}
1.483 +
1.484 +
