141 lines
3.8 KiB
C++
141 lines
3.8 KiB
C++
/*
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* Copyright © 2018 Google, 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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* Google Author(s): Behdad Esfahbod
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*/
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#include "hb.hh"
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#include "hb-open-type.hh"
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#include "hb-face.hh"
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#include "hb-aat-layout-common.hh"
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#include "hb-aat-layout-feat-table.hh"
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#include "hb-ot-layout-common.hh"
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#include "hb-ot-cmap-table.hh"
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#include "hb-ot-glyf-table.hh"
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#include "hb-ot-head-table.hh"
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#include "hb-ot-maxp-table.hh"
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#ifndef HB_NO_VISIBILITY
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#include "hb-ot-name-language-static.hh"
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uint64_t const _hb_NullPool[(HB_NULL_POOL_SIZE + sizeof (uint64_t) - 1) / sizeof (uint64_t)] = {};
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/*thread_local*/ uint64_t _hb_CrapPool[(HB_NULL_POOL_SIZE + sizeof (uint64_t) - 1) / sizeof (uint64_t)] = {};
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DEFINE_NULL_NAMESPACE_BYTES (OT, Index) = {0xFF,0xFF};
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DEFINE_NULL_NAMESPACE_BYTES (OT, VarIdx) = {0xFF,0xFF,0xFF,0xFF};
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DEFINE_NULL_NAMESPACE_BYTES (OT, LangSys) = {0x00,0x00, 0xFF,0xFF, 0x00,0x00};
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DEFINE_NULL_NAMESPACE_BYTES (OT, RangeRecord) = {0x00,0x01, 0x00,0x00, 0x00, 0x00};
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DEFINE_NULL_NAMESPACE_BYTES (OT, CmapSubtableLongGroup) = {0x00,0x00,0x00,0x01, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00};
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DEFINE_NULL_NAMESPACE_BYTES (AAT, SettingName) = {0xFF,0xFF, 0xFF,0xFF};
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/* Hand-coded because Lookup is a template. Sad. */
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const unsigned char _hb_Null_AAT_Lookup[2] = {0xFF, 0xFF};
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/* hb_face_t */
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#ifndef HB_NO_BORING_EXPANSION
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static inline unsigned
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load_num_glyphs_from_loca (const hb_face_t *face)
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{
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unsigned ret = 0;
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unsigned indexToLocFormat = face->table.head->indexToLocFormat;
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if (indexToLocFormat <= 1)
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{
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bool short_offset = 0 == indexToLocFormat;
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hb_blob_t *loca_blob = face->table.loca.get_blob ();
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ret = hb_max (1u, loca_blob->length / (short_offset ? 2 : 4)) - 1;
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}
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return ret;
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}
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#endif
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static inline unsigned
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load_num_glyphs_from_maxp (const hb_face_t *face)
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{
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return face->table.maxp->get_num_glyphs ();
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}
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unsigned int
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hb_face_t::load_num_glyphs () const
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{
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unsigned ret = 0;
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#ifndef HB_NO_BORING_EXPANSION
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ret = hb_max (ret, load_num_glyphs_from_loca (this));
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#endif
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ret = hb_max (ret, load_num_glyphs_from_maxp (this));
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num_glyphs.set_relaxed (ret);
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return ret;
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}
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unsigned int
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hb_face_t::load_upem () const
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{
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unsigned int ret = table.head->get_upem ();
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upem.set_relaxed (ret);
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return ret;
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}
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/* hb_user_data_array_t */
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bool
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hb_user_data_array_t::set (hb_user_data_key_t *key,
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void * data,
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hb_destroy_func_t destroy,
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hb_bool_t replace)
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{
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if (!key)
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return false;
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if (replace) {
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if (!data && !destroy) {
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items.remove (key, lock);
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return true;
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}
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}
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hb_user_data_item_t item = {key, data, destroy};
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bool ret = !!items.replace_or_insert (item, lock, (bool) replace);
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return ret;
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}
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void *
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hb_user_data_array_t::get (hb_user_data_key_t *key)
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{
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hb_user_data_item_t item = {nullptr, nullptr, nullptr};
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return items.find (key, &item, lock) ? item.data : nullptr;
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}
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#endif
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