104 lines
3.0 KiB
C++
104 lines
3.0 KiB
C++
/*
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* Copyright © 2009 Red Hat, Inc.
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*
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* This is part of HarfBuzz, a text shaping library.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and its documentation for any purpose, provided that the
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* above copyright notice and the following two paragraphs appear in
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* all copies of this software.
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*
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* Red Hat Author(s): Behdad Esfahbod
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*/
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#include "hb-private.hh"
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#include "hb-shaper-private.hh"
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#include "hb-shape-plan-private.hh"
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#include "hb-buffer-private.hh"
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#include "hb-font-private.hh"
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static const char **static_shaper_list;
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static
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void free_static_shaper_list (void)
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{
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free (static_shaper_list);
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}
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const char **
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hb_shape_list_shapers (void)
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{
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retry:
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const char **shaper_list = (const char **) hb_atomic_ptr_get (&static_shaper_list);
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if (unlikely (!shaper_list))
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{
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/* Not found; allocate one. */
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shaper_list = (const char **) calloc (1 + HB_SHAPERS_COUNT, sizeof (const char *));
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if (unlikely (!shaper_list)) {
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static const char *nil_shaper_list[] = {NULL};
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return nil_shaper_list;
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}
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const hb_shaper_pair_t *shapers = _hb_shapers_get ();
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unsigned int i;
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for (i = 0; i < HB_SHAPERS_COUNT; i++)
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shaper_list[i] = shapers[i].name;
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shaper_list[i] = NULL;
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if (!hb_atomic_ptr_cmpexch (&static_shaper_list, NULL, shaper_list)) {
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free (shaper_list);
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goto retry;
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}
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#ifdef HAVE_ATEXIT
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atexit (free_static_shaper_list); /* First person registers atexit() callback. */
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#endif
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}
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return shaper_list;
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}
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hb_bool_t
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hb_shape_full (hb_font_t *font,
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hb_buffer_t *buffer,
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const hb_feature_t *features,
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unsigned int num_features,
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const char * const *shaper_list)
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{
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if (unlikely (!buffer->len))
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return true;
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buffer->guess_properties ();
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hb_shape_plan_t *shape_plan = hb_shape_plan_create_cached (font->face, &buffer->props, features, num_features, shaper_list);
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hb_bool_t res = hb_shape_plan_execute (shape_plan, font, buffer, features, num_features);
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hb_shape_plan_destroy (shape_plan);
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return res;
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}
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void
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hb_shape (hb_font_t *font,
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hb_buffer_t *buffer,
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const hb_feature_t *features,
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unsigned int num_features)
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{
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hb_shape_full (font, buffer, features, num_features, NULL);
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}
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