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/*
* Copyright © 2022 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.
*
* Google Author(s): Garret Rieger
*/
#ifndef HB_SUBSET_ACCELERATOR_HH
#define HB_SUBSET_ACCELERATOR_HH
#include "hb.hh"
#include "hb-map.hh"
#include "hb-multimap.hh"
#include "hb-set.hh"
extern HB_INTERNAL hb_user_data_key_t _hb_subset_accelerator_user_data_key;
namespace CFF {
struct cff_subset_accelerator_t;
}
namespace OT {
struct SubtableUnicodesCache;
};
struct hb_subset_accelerator_t
{
static hb_user_data_key_t* user_data_key()
{
return &_hb_subset_accelerator_user_data_key;
}
static hb_subset_accelerator_t* create(const hb_map_t& unicode_to_gid_,
const hb_multimap_t gid_to_unicodes_,
const hb_set_t& unicodes_,
bool has_seac_) {
hb_subset_accelerator_t* accel =
(hb_subset_accelerator_t*) hb_malloc (sizeof(hb_subset_accelerator_t));
new (accel) hb_subset_accelerator_t (unicode_to_gid_, gid_to_unicodes_, unicodes_);
accel->has_seac = has_seac_;
return accel;
}
static void destroy(void* value) {
if (!value) return;
hb_subset_accelerator_t* accel = (hb_subset_accelerator_t*) value;
if (accel->cff_accelerator && accel->destroy_cff_accelerator)
accel->destroy_cff_accelerator ((void*) accel->cff_accelerator);
if (accel->cmap_cache && accel->destroy_cmap_cache)
accel->destroy_cmap_cache ((void*) accel->cmap_cache);
accel->~hb_subset_accelerator_t ();
hb_free (accel);
}
hb_subset_accelerator_t (const hb_map_t& unicode_to_gid_,
const hb_multimap_t& gid_to_unicodes_,
const hb_set_t& unicodes_)
: unicode_to_gid(unicode_to_gid_), gid_to_unicodes (gid_to_unicodes_), unicodes(unicodes_),
cmap_cache(nullptr), destroy_cmap_cache(nullptr),
has_seac(false), cff_accelerator(nullptr), destroy_cff_accelerator(nullptr)
{ sanitized_table_cache_lock.init (); }
~hb_subset_accelerator_t ()
{ sanitized_table_cache_lock.fini (); }
// Generic
mutable hb_mutex_t sanitized_table_cache_lock;
mutable hb_hashmap_t<hb_tag_t, hb::unique_ptr<hb_blob_t>> sanitized_table_cache;
const hb_map_t unicode_to_gid;
const hb_multimap_t gid_to_unicodes;
const hb_set_t unicodes;
// cmap
const OT::SubtableUnicodesCache* cmap_cache;
hb_destroy_func_t destroy_cmap_cache;
// CFF
bool has_seac;
const CFF::cff_subset_accelerator_t* cff_accelerator;
hb_destroy_func_t destroy_cff_accelerator;
// TODO(garretrieger): cumulative glyf checksum map
bool in_error () const
{
return unicode_to_gid.in_error () ||
gid_to_unicodes.in_error () ||
unicodes.in_error () ||
sanitized_table_cache.in_error ();
}
};
#endif /* HB_SUBSET_ACCELERATOR_HH */
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