LCOV - code coverage report
Current view: directory - gfx/cairo/cairo/src - cairo-toy-font-face.c (source / functions) Found Hit Coverage
Test: app.info Lines: 158 5 3.2 %
Date: 2012-06-02 Functions: 19 1 5.3 %

       1                 : /* -*- Mode: c; c-basic-offset: 4; indent-tabs-mode: t; tab-width: 8; -*- */
       2                 : /* cairo - a vector graphics library with display and print output
       3                 :  *
       4                 :  * Copyright © 2002 University of Southern California
       5                 :  * Copyright © 2005,2008 Red Hat Inc.
       6                 :  *
       7                 :  * This library is free software; you can redistribute it and/or
       8                 :  * modify it either under the terms of the GNU Lesser General Public
       9                 :  * License version 2.1 as published by the Free Software Foundation
      10                 :  * (the "LGPL") or, at your option, under the terms of the Mozilla
      11                 :  * Public License Version 1.1 (the "MPL"). If you do not alter this
      12                 :  * notice, a recipient may use your version of this file under either
      13                 :  * the MPL or the LGPL.
      14                 :  *
      15                 :  * You should have received a copy of the LGPL along with this library
      16                 :  * in the file COPYING-LGPL-2.1; if not, write to the Free Software
      17                 :  * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
      18                 :  * You should have received a copy of the MPL along with this library
      19                 :  * in the file COPYING-MPL-1.1
      20                 :  *
      21                 :  * The contents of this file are subject to the Mozilla Public License
      22                 :  * Version 1.1 (the "License"); you may not use this file except in
      23                 :  * compliance with the License. You may obtain a copy of the License at
      24                 :  * http://www.mozilla.org/MPL/
      25                 :  *
      26                 :  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
      27                 :  * OF ANY KIND, either express or implied. See the LGPL or the MPL for
      28                 :  * the specific language governing rights and limitations.
      29                 :  *
      30                 :  * The Original Code is the cairo graphics library.
      31                 :  *
      32                 :  * The Initial Developer of the Original Code is University of Southern
      33                 :  * California.
      34                 :  *
      35                 :  * Contributor(s):
      36                 :  *      Carl D. Worth <cworth@cworth.org>
      37                 :  *      Graydon Hoare <graydon@redhat.com>
      38                 :  *      Owen Taylor <otaylor@redhat.com>
      39                 :  *      Behdad Esfahbod <behdad@behdad.org>
      40                 :  */
      41                 : 
      42                 : #define _BSD_SOURCE /* for strdup() */
      43                 : #include "cairoint.h"
      44                 : #include "cairo-error-private.h"
      45                 : 
      46                 : 
      47                 : static const cairo_font_face_t _cairo_font_face_null_pointer = {
      48                 :     { 0 },                              /* hash_entry */
      49                 :     CAIRO_STATUS_NULL_POINTER,          /* status */
      50                 :     CAIRO_REFERENCE_COUNT_INVALID,      /* ref_count */
      51                 :     { 0, 0, 0, NULL },                  /* user_data */
      52                 :     NULL
      53                 : };
      54                 : 
      55                 : static const cairo_font_face_t _cairo_font_face_invalid_string = {
      56                 :     { 0 },                              /* hash_entry */
      57                 :     CAIRO_STATUS_INVALID_STRING,        /* status */
      58                 :     CAIRO_REFERENCE_COUNT_INVALID,      /* ref_count */
      59                 :     { 0, 0, 0, NULL },                  /* user_data */
      60                 :     NULL
      61                 : };
      62                 : 
      63                 : static const cairo_font_face_t _cairo_font_face_invalid_slant = {
      64                 :     { 0 },                              /* hash_entry */
      65                 :     CAIRO_STATUS_INVALID_SLANT,         /* status */
      66                 :     CAIRO_REFERENCE_COUNT_INVALID,      /* ref_count */
      67                 :     { 0, 0, 0, NULL },                  /* user_data */
      68                 :     NULL
      69                 : };
      70                 : 
      71                 : static const cairo_font_face_t _cairo_font_face_invalid_weight = {
      72                 :     { 0 },                              /* hash_entry */
      73                 :     CAIRO_STATUS_INVALID_WEIGHT,        /* status */
      74                 :     CAIRO_REFERENCE_COUNT_INVALID,      /* ref_count */
      75                 :     { 0, 0, 0, NULL },                  /* user_data */
      76                 :     NULL
      77                 : };
      78                 : 
      79                 : 
      80                 : static const cairo_font_face_backend_t _cairo_toy_font_face_backend;
      81                 : 
      82                 : static int
      83                 : _cairo_toy_font_face_keys_equal (const void *key_a,
      84                 :                                  const void *key_b);
      85                 : 
      86                 : /* We maintain a hash table from family/weight/slant =>
      87                 :  * #cairo_font_face_t for #cairo_toy_font_t. The primary purpose of
      88                 :  * this mapping is to provide unique #cairo_font_face_t values so that
      89                 :  * our cache and mapping from #cairo_font_face_t => #cairo_scaled_font_t
      90                 :  * works. Once the corresponding #cairo_font_face_t objects fall out of
      91                 :  * downstream caches, we don't need them in this hash table anymore.
      92                 :  *
      93                 :  * Modifications to this hash table are protected by
      94                 :  * _cairo_toy_font_face_mutex.
      95                 :  */
      96                 : static cairo_hash_table_t *cairo_toy_font_face_hash_table = NULL;
      97                 : 
      98                 : static cairo_hash_table_t *
      99               0 : _cairo_toy_font_face_hash_table_lock (void)
     100                 : {
     101                 :     CAIRO_MUTEX_LOCK (_cairo_toy_font_face_mutex);
     102                 : 
     103               0 :     if (cairo_toy_font_face_hash_table == NULL)
     104                 :     {
     105               0 :         cairo_toy_font_face_hash_table =
     106               0 :             _cairo_hash_table_create (_cairo_toy_font_face_keys_equal);
     107                 : 
     108               0 :         if (cairo_toy_font_face_hash_table == NULL) {
     109                 :             CAIRO_MUTEX_UNLOCK (_cairo_toy_font_face_mutex);
     110               0 :             return NULL;
     111                 :         }
     112                 :     }
     113                 : 
     114               0 :     return cairo_toy_font_face_hash_table;
     115                 : }
     116                 : 
     117                 : static void
     118               0 : _cairo_toy_font_face_hash_table_unlock (void)
     119                 : {
     120                 :     CAIRO_MUTEX_UNLOCK (_cairo_toy_font_face_mutex);
     121               0 : }
     122                 : 
     123                 : /**
     124                 :  * _cairo_toy_font_face_init_key:
     125                 :  *
     126                 :  * Initialize those portions of #cairo_toy_font_face_t needed to use
     127                 :  * it as a hash table key, including the hash code buried away in
     128                 :  * font_face->base.hash_entry. No memory allocation is performed here
     129                 :  * so that no fini call is needed. We do this to make it easier to use
     130                 :  * an automatic #cairo_toy_font_face_t variable as a key.
     131                 :  **/
     132                 : static void
     133               0 : _cairo_toy_font_face_init_key (cairo_toy_font_face_t *key,
     134                 :                                const char            *family,
     135                 :                                cairo_font_slant_t     slant,
     136                 :                                cairo_font_weight_t    weight)
     137                 : {
     138                 :     unsigned long hash;
     139                 : 
     140               0 :     key->family = family;
     141               0 :     key->owns_family = FALSE;
     142                 : 
     143               0 :     key->slant = slant;
     144               0 :     key->weight = weight;
     145                 : 
     146                 :     /* 1607 and 1451 are just a couple of arbitrary primes. */
     147               0 :     hash = _cairo_hash_string (family);
     148               0 :     hash += ((unsigned long) slant) * 1607;
     149               0 :     hash += ((unsigned long) weight) * 1451;
     150                 : 
     151               0 :     assert (hash != 0);
     152               0 :     key->base.hash_entry.hash = hash;
     153               0 : }
     154                 : 
     155                 : static cairo_status_t
     156               0 : _cairo_toy_font_face_create_impl_face (cairo_toy_font_face_t *font_face,
     157                 :                                        cairo_font_face_t **impl_font_face)
     158                 : {
     159               0 :     const cairo_font_face_backend_t * backend = CAIRO_FONT_FACE_BACKEND_DEFAULT;
     160               0 :     cairo_int_status_t status = CAIRO_INT_STATUS_UNSUPPORTED;
     161                 : 
     162               0 :     if (unlikely (font_face->base.status))
     163               0 :         return font_face->base.status;
     164                 : 
     165               0 :     if (backend->create_for_toy != NULL &&
     166               0 :         0 != strncmp (font_face->family, CAIRO_USER_FONT_FAMILY_DEFAULT,
     167                 :                       strlen (CAIRO_USER_FONT_FAMILY_DEFAULT)))
     168                 :     {
     169               0 :         status = backend->create_for_toy (font_face, impl_font_face);
     170                 :     }
     171                 : 
     172               0 :     if (status == CAIRO_INT_STATUS_UNSUPPORTED) {
     173               0 :         backend = &_cairo_user_font_face_backend;
     174               0 :         status = backend->create_for_toy (font_face, impl_font_face);
     175                 :     }
     176                 : 
     177               0 :     return status;
     178                 : }
     179                 : 
     180                 : static cairo_status_t
     181               0 : _cairo_toy_font_face_init (cairo_toy_font_face_t *font_face,
     182                 :                            const char            *family,
     183                 :                            cairo_font_slant_t     slant,
     184                 :                            cairo_font_weight_t    weight)
     185                 : {
     186                 :     char *family_copy;
     187                 :     cairo_status_t status;
     188                 : 
     189               0 :     family_copy = strdup (family);
     190               0 :     if (unlikely (family_copy == NULL))
     191               0 :         return _cairo_error (CAIRO_STATUS_NO_MEMORY);
     192                 : 
     193               0 :     _cairo_toy_font_face_init_key (font_face, family_copy, slant, weight);
     194               0 :     font_face->owns_family = TRUE;
     195                 : 
     196               0 :     _cairo_font_face_init (&font_face->base, &_cairo_toy_font_face_backend);
     197                 : 
     198               0 :     status = _cairo_toy_font_face_create_impl_face (font_face,
     199                 :                                                     &font_face->impl_face);
     200               0 :     if (unlikely (status)) {
     201               0 :         free (family_copy);
     202               0 :         return status;
     203                 :     }
     204                 : 
     205               0 :     return CAIRO_STATUS_SUCCESS;
     206                 : }
     207                 : 
     208                 : static void
     209               0 : _cairo_toy_font_face_fini (cairo_toy_font_face_t *font_face)
     210                 : {
     211                 :     /* We assert here that we own font_face->family before casting
     212                 :      * away the const qualifer. */
     213               0 :     assert (font_face->owns_family);
     214               0 :     free ((char*) font_face->family);
     215                 : 
     216               0 :     if (font_face->impl_face)
     217               0 :         cairo_font_face_destroy (font_face->impl_face);
     218               0 : }
     219                 : 
     220                 : static int
     221               0 : _cairo_toy_font_face_keys_equal (const void *key_a,
     222                 :                                  const void *key_b)
     223                 : {
     224               0 :     const cairo_toy_font_face_t *face_a = key_a;
     225               0 :     const cairo_toy_font_face_t *face_b = key_b;
     226                 : 
     227               0 :     return (strcmp (face_a->family, face_b->family) == 0 &&
     228               0 :             face_a->slant == face_b->slant &&
     229               0 :             face_a->weight == face_b->weight);
     230                 : }
     231                 : 
     232                 : /**
     233                 :  * cairo_toy_font_face_create:
     234                 :  * @family: a font family name, encoded in UTF-8
     235                 :  * @slant: the slant for the font
     236                 :  * @weight: the weight for the font
     237                 :  *
     238                 :  * Creates a font face from a triplet of family, slant, and weight.
     239                 :  * These font faces are used in implementation of the the #cairo_t "toy"
     240                 :  * font API.
     241                 :  *
     242                 :  * If @family is the zero-length string "", the platform-specific default
     243                 :  * family is assumed.  The default family then can be queried using
     244                 :  * cairo_toy_font_face_get_family().
     245                 :  *
     246                 :  * The cairo_select_font_face() function uses this to create font faces.
     247                 :  * See that function for limitations and other details of toy font faces.
     248                 :  *
     249                 :  * Return value: a newly created #cairo_font_face_t. Free with
     250                 :  *  cairo_font_face_destroy() when you are done using it.
     251                 :  *
     252                 :  * Since: 1.8
     253                 :  **/
     254                 : cairo_font_face_t *
     255               0 : cairo_toy_font_face_create (const char          *family,
     256                 :                             cairo_font_slant_t   slant,
     257                 :                             cairo_font_weight_t  weight)
     258                 : {
     259                 :     cairo_status_t status;
     260                 :     cairo_toy_font_face_t key, *font_face;
     261                 :     cairo_hash_table_t *hash_table;
     262                 : 
     263               0 :     if (family == NULL)
     264               0 :         return (cairo_font_face_t*) &_cairo_font_face_null_pointer;
     265                 : 
     266                 :     /* Make sure we've got valid UTF-8 for the family */
     267               0 :     status = _cairo_utf8_to_ucs4 (family, -1, NULL, NULL);
     268               0 :     if (unlikely (status)) {
     269               0 :         if (status == CAIRO_STATUS_INVALID_STRING)
     270               0 :             return (cairo_font_face_t*) &_cairo_font_face_invalid_string;
     271                 : 
     272               0 :         return (cairo_font_face_t*) &_cairo_font_face_nil;
     273                 :     }
     274                 : 
     275               0 :     switch (slant) {
     276                 :         case CAIRO_FONT_SLANT_NORMAL:
     277                 :         case CAIRO_FONT_SLANT_ITALIC:
     278                 :         case CAIRO_FONT_SLANT_OBLIQUE:
     279                 :             break;
     280                 :         default:
     281               0 :             return (cairo_font_face_t*) &_cairo_font_face_invalid_slant;
     282                 :     }
     283                 : 
     284               0 :     switch (weight) {
     285                 :         case CAIRO_FONT_WEIGHT_NORMAL:
     286                 :         case CAIRO_FONT_WEIGHT_BOLD:
     287                 :             break;
     288                 :         default:
     289               0 :             return (cairo_font_face_t*) &_cairo_font_face_invalid_weight;
     290                 :     }
     291                 : 
     292               0 :     if (*family == '\0')
     293               0 :         family = CAIRO_FONT_FAMILY_DEFAULT;
     294                 : 
     295               0 :     hash_table = _cairo_toy_font_face_hash_table_lock ();
     296               0 :     if (unlikely (hash_table == NULL))
     297               0 :         goto UNWIND;
     298                 : 
     299               0 :     _cairo_toy_font_face_init_key (&key, family, slant, weight);
     300                 : 
     301                 :     /* Return existing font_face if it exists in the hash table. */
     302               0 :     font_face = _cairo_hash_table_lookup (hash_table,
     303                 :                                           &key.base.hash_entry);
     304               0 :     if (font_face != NULL) {
     305               0 :         if (font_face->base.status == CAIRO_STATUS_SUCCESS) {
     306                 :             /* We increment the reference count here manually to avoid
     307                 :                double-locking. */
     308               0 :             _cairo_reference_count_inc (&font_face->base.ref_count);
     309               0 :             _cairo_toy_font_face_hash_table_unlock ();
     310               0 :             return &font_face->base;
     311                 :         }
     312                 : 
     313                 :         /* remove the bad font from the hash table */
     314               0 :         _cairo_hash_table_remove (hash_table, &font_face->base.hash_entry);
     315               0 :         font_face->base.hash_entry.hash = 0;
     316                 :     }
     317                 : 
     318                 :     /* Otherwise create it and insert into hash table. */
     319               0 :     font_face = malloc (sizeof (cairo_toy_font_face_t));
     320               0 :     if (unlikely (font_face == NULL)) {
     321               0 :         status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
     322               0 :         goto UNWIND_HASH_TABLE_LOCK;
     323                 :     }
     324                 : 
     325               0 :     status = _cairo_toy_font_face_init (font_face, family, slant, weight);
     326               0 :     if (unlikely (status))
     327               0 :         goto UNWIND_FONT_FACE_MALLOC;
     328                 : 
     329               0 :     assert (font_face->base.hash_entry.hash == key.base.hash_entry.hash);
     330               0 :     status = _cairo_hash_table_insert (hash_table, &font_face->base.hash_entry);
     331               0 :     if (unlikely (status))
     332               0 :         goto UNWIND_FONT_FACE_INIT;
     333                 : 
     334               0 :     _cairo_toy_font_face_hash_table_unlock ();
     335                 : 
     336               0 :     return &font_face->base;
     337                 : 
     338                 :  UNWIND_FONT_FACE_INIT:
     339               0 :     _cairo_toy_font_face_fini (font_face);
     340                 :  UNWIND_FONT_FACE_MALLOC:
     341               0 :     free (font_face);
     342                 :  UNWIND_HASH_TABLE_LOCK:
     343               0 :     _cairo_toy_font_face_hash_table_unlock ();
     344                 :  UNWIND:
     345               0 :     return (cairo_font_face_t*) &_cairo_font_face_nil;
     346                 : }
     347                 : slim_hidden_def (cairo_toy_font_face_create);
     348                 : 
     349                 : static void
     350               0 : _cairo_toy_font_face_destroy (void *abstract_face)
     351                 : {
     352               0 :     cairo_toy_font_face_t *font_face = abstract_face;
     353                 :     cairo_hash_table_t *hash_table;
     354                 : 
     355               0 :     if (font_face == NULL ||
     356               0 :             CAIRO_REFERENCE_COUNT_IS_INVALID (&font_face->base.ref_count))
     357               0 :         return;
     358                 : 
     359               0 :     hash_table = _cairo_toy_font_face_hash_table_lock ();
     360                 :     /* All created objects must have been mapped in the hash table. */
     361               0 :     assert (hash_table != NULL);
     362                 : 
     363               0 :     if (CAIRO_REFERENCE_COUNT_HAS_REFERENCE (&font_face->base.ref_count)) {
     364                 :         /* somebody recreated the font whilst we waited for the lock */
     365               0 :         _cairo_toy_font_face_hash_table_unlock ();
     366               0 :         return;
     367                 :     }
     368                 : 
     369               0 :     if (font_face->base.hash_entry.hash != 0)
     370               0 :         _cairo_hash_table_remove (hash_table, &font_face->base.hash_entry);
     371                 : 
     372               0 :     _cairo_toy_font_face_hash_table_unlock ();
     373                 : 
     374               0 :     _cairo_toy_font_face_fini (font_face);
     375                 : }
     376                 : 
     377                 : static cairo_status_t
     378               0 : _cairo_toy_font_face_scaled_font_create (void                *abstract_font_face,
     379                 :                                          const cairo_matrix_t       *font_matrix,
     380                 :                                          const cairo_matrix_t       *ctm,
     381                 :                                          const cairo_font_options_t *options,
     382                 :                                          cairo_scaled_font_t       **scaled_font)
     383                 : {
     384               0 :     cairo_toy_font_face_t *font_face = (cairo_toy_font_face_t *) abstract_font_face;
     385                 : 
     386               0 :     ASSERT_NOT_REACHED;
     387                 : 
     388               0 :     return _cairo_font_face_set_error (&font_face->base, CAIRO_STATUS_FONT_TYPE_MISMATCH);
     389                 : }
     390                 : 
     391                 : static cairo_font_face_t *
     392               0 : _cairo_toy_font_face_get_implementation (void                *abstract_font_face,
     393                 :                                          const cairo_matrix_t       *font_matrix,
     394                 :                                          const cairo_matrix_t       *ctm,
     395                 :                                          const cairo_font_options_t *options)
     396                 : {
     397               0 :     cairo_toy_font_face_t *font_face = abstract_font_face;
     398                 : 
     399               0 :     if (font_face->impl_face) {
     400               0 :         cairo_font_face_t *impl = font_face->impl_face;
     401                 : 
     402               0 :         if (impl->backend->get_implementation != NULL) {
     403               0 :             return impl->backend->get_implementation (impl,
     404                 :                                                       font_matrix,
     405                 :                                                       ctm,
     406                 :                                                       options);
     407                 :         }
     408                 : 
     409               0 :         return cairo_font_face_reference (impl);
     410                 :     }
     411                 : 
     412               0 :     return abstract_font_face;
     413                 : }
     414                 : 
     415                 : static cairo_bool_t
     416               0 : _cairo_font_face_is_toy (cairo_font_face_t *font_face)
     417                 : {
     418               0 :     return font_face->backend == &_cairo_toy_font_face_backend;
     419                 : }
     420                 : 
     421                 : /**
     422                 :  * cairo_toy_font_face_get_family:
     423                 :  * @font_face: A toy font face
     424                 :  *
     425                 :  * Gets the familly name of a toy font.
     426                 :  *
     427                 :  * Return value: The family name.  This string is owned by the font face
     428                 :  * and remains valid as long as the font face is alive (referenced).
     429                 :  *
     430                 :  * Since: 1.8
     431                 :  **/
     432                 : const char *
     433               0 : cairo_toy_font_face_get_family (cairo_font_face_t *font_face)
     434                 : {
     435                 :     cairo_toy_font_face_t *toy_font_face;
     436                 : 
     437               0 :     if (font_face->status)
     438               0 :         return CAIRO_FONT_FAMILY_DEFAULT;
     439                 : 
     440               0 :     toy_font_face = (cairo_toy_font_face_t *) font_face;
     441               0 :     if (! _cairo_font_face_is_toy (font_face)) {
     442               0 :         if (_cairo_font_face_set_error (font_face, CAIRO_STATUS_FONT_TYPE_MISMATCH))
     443               0 :             return CAIRO_FONT_FAMILY_DEFAULT;
     444                 :     }
     445               0 :     assert (toy_font_face->owns_family);
     446               0 :     return toy_font_face->family;
     447                 : }
     448                 : 
     449                 : /**
     450                 :  * cairo_toy_font_face_get_slant:
     451                 :  * @font_face: A toy font face
     452                 :  *
     453                 :  * Gets the slant a toy font.
     454                 :  *
     455                 :  * Return value: The slant value
     456                 :  *
     457                 :  * Since: 1.8
     458                 :  **/
     459                 : cairo_font_slant_t
     460               0 : cairo_toy_font_face_get_slant (cairo_font_face_t *font_face)
     461                 : {
     462                 :     cairo_toy_font_face_t *toy_font_face;
     463                 : 
     464               0 :     if (font_face->status)
     465               0 :         return CAIRO_FONT_SLANT_DEFAULT;
     466                 : 
     467               0 :     toy_font_face = (cairo_toy_font_face_t *) font_face;
     468               0 :     if (! _cairo_font_face_is_toy (font_face)) {
     469               0 :         if (_cairo_font_face_set_error (font_face, CAIRO_STATUS_FONT_TYPE_MISMATCH))
     470               0 :             return CAIRO_FONT_SLANT_DEFAULT;
     471                 :     }
     472               0 :     return toy_font_face->slant;
     473                 : }
     474                 : slim_hidden_def (cairo_toy_font_face_get_slant);
     475                 : 
     476                 : /**
     477                 :  * cairo_toy_font_face_get_weight:
     478                 :  * @font_face: A toy font face
     479                 :  *
     480                 :  * Gets the weight a toy font.
     481                 :  *
     482                 :  * Return value: The weight value
     483                 :  *
     484                 :  * Since: 1.8
     485                 :  **/
     486                 : cairo_font_weight_t
     487               0 : cairo_toy_font_face_get_weight (cairo_font_face_t *font_face)
     488                 : {
     489                 :     cairo_toy_font_face_t *toy_font_face;
     490                 : 
     491               0 :     if (font_face->status)
     492               0 :         return CAIRO_FONT_WEIGHT_DEFAULT;
     493                 : 
     494               0 :     toy_font_face = (cairo_toy_font_face_t *) font_face;
     495               0 :     if (! _cairo_font_face_is_toy (font_face)) {
     496               0 :         if (_cairo_font_face_set_error (font_face, CAIRO_STATUS_FONT_TYPE_MISMATCH))
     497               0 :             return CAIRO_FONT_WEIGHT_DEFAULT;
     498                 :     }
     499               0 :     return toy_font_face->weight;
     500                 : }
     501                 : slim_hidden_def (cairo_toy_font_face_get_weight);
     502                 : 
     503                 : static const cairo_font_face_backend_t _cairo_toy_font_face_backend = {
     504                 :     CAIRO_FONT_TYPE_TOY,
     505                 :     NULL,                                       /* create_for_toy */
     506                 :     _cairo_toy_font_face_destroy,
     507                 :     _cairo_toy_font_face_scaled_font_create,
     508                 :     _cairo_toy_font_face_get_implementation
     509                 : };
     510                 : 
     511                 : void
     512               3 : _cairo_toy_font_face_reset_static_data (void)
     513                 : {
     514                 :     cairo_hash_table_t *hash_table;
     515                 : 
     516                 :     /* We manually acquire the lock rather than calling
     517                 :      * cairo_toy_font_face_hash_table_lock simply to avoid
     518                 :      * creating the table only to destroy it again. */
     519                 :     CAIRO_MUTEX_LOCK (_cairo_toy_font_face_mutex);
     520               3 :     hash_table = cairo_toy_font_face_hash_table;
     521               3 :     cairo_toy_font_face_hash_table = NULL;
     522                 :     CAIRO_MUTEX_UNLOCK (_cairo_toy_font_face_mutex);
     523                 : 
     524               3 :     if (hash_table != NULL)
     525               0 :         _cairo_hash_table_destroy (hash_table);
     526               3 : }

Generated by: LCOV version 1.7