tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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hb-subset-input.hh (4132B)

      1 /*
      2 * Copyright © 2018  Google, Inc.
      3 *
      4 *  This is part of HarfBuzz, a text shaping library.
      5 *
      6 * Permission is hereby granted, without written agreement and without
      7 * license or royalty fees, to use, copy, modify, and distribute this
      8 * software and its documentation for any purpose, provided that the
      9 * above copyright notice and the following two paragraphs appear in
     10 * all copies of this software.
     11 *
     12 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
     13 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
     14 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
     15 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
     16 * DAMAGE.
     17 *
     18 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
     19 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
     20 * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
     21 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
     22 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
     23 *
     24 * Google Author(s): Garret Rieger, Roderick Sheeter
     25 */
     26 
     27 #ifndef HB_SUBSET_INPUT_HH
     28 #define HB_SUBSET_INPUT_HH
     29 
     30 
     31 #include "hb.hh"
     32 
     33 #include "hb-subset.h"
     34 #include "hb-map.hh"
     35 #include "hb-set.hh"
     36 #include "hb-cplusplus.hh"
     37 #include "hb-font.hh"
     38 #include "hb-subset-instancer-solver.hh"
     39 
     40 struct hb_ot_name_record_ids_t
     41 {
     42  hb_ot_name_record_ids_t () = default;
     43  hb_ot_name_record_ids_t (unsigned platform_id_,
     44                           unsigned encoding_id_,
     45                           unsigned language_id_,
     46                           unsigned name_id_)
     47      :platform_id (platform_id_),
     48      encoding_id (encoding_id_),
     49      language_id (language_id_),
     50      name_id (name_id_) {}
     51 
     52  bool operator != (const hb_ot_name_record_ids_t o) const
     53  { return !(*this == o); }
     54 
     55  inline bool operator == (const hb_ot_name_record_ids_t& o) const
     56  {
     57    return platform_id == o.platform_id &&
     58           encoding_id == o.encoding_id &&
     59           language_id == o.language_id &&
     60           name_id == o.name_id;
     61  }
     62 
     63  inline uint32_t hash () const
     64  {
     65    uint32_t current = 0;
     66    current = current * 31 + hb_hash (platform_id);
     67    current = current * 31 + hb_hash (encoding_id);
     68    current = current * 31 + hb_hash (language_id);
     69    current = current * 31 + hb_hash (name_id);
     70    return current;
     71  }
     72 
     73  unsigned platform_id;
     74  unsigned encoding_id;
     75  unsigned language_id;
     76  unsigned name_id;
     77 };
     78 
     79 typedef struct hb_ot_name_record_ids_t hb_ot_name_record_ids_t;
     80 
     81 
     82 HB_MARK_AS_FLAG_T (hb_subset_flags_t);
     83 
     84 struct hb_subset_input_t
     85 {
     86  HB_INTERNAL hb_subset_input_t ();
     87 
     88  ~hb_subset_input_t ()
     89  {
     90    sets.~sets_t ();
     91 
     92 #ifdef HB_EXPERIMENTAL_API
     93    for (auto _ : name_table_overrides.values ())
     94      _.fini ();
     95 #endif
     96  }
     97 
     98  hb_object_header_t header;
     99 
    100  struct sets_t {
    101    hb::shared_ptr<hb_set_t> glyphs;
    102    hb::shared_ptr<hb_set_t> unicodes;
    103    hb::shared_ptr<hb_set_t> no_subset_tables;
    104    hb::shared_ptr<hb_set_t> drop_tables;
    105    hb::shared_ptr<hb_set_t> name_ids;
    106    hb::shared_ptr<hb_set_t> name_languages;
    107    hb::shared_ptr<hb_set_t> layout_features;
    108    hb::shared_ptr<hb_set_t> layout_scripts;
    109  };
    110 
    111  union {
    112    sets_t sets;
    113    hb::shared_ptr<hb_set_t> set_ptrs[sizeof (sets_t) / sizeof (hb_set_t*)];
    114  };
    115 
    116  unsigned flags;
    117  bool attach_accelerator_data = false;
    118 
    119  // If set loca format will always be the long version.
    120  bool force_long_loca = false;
    121 
    122  hb_hashmap_t<hb_tag_t, Triple> axes_location;
    123  hb_map_t glyph_map;
    124 #ifdef HB_EXPERIMENTAL_API
    125  hb_hashmap_t<hb_ot_name_record_ids_t, hb_bytes_t> name_table_overrides;
    126 #endif
    127 
    128  inline unsigned num_sets () const
    129  {
    130    return sizeof (set_ptrs) / sizeof (hb_set_t*);
    131  }
    132 
    133  inline hb_array_t<hb::shared_ptr<hb_set_t>> sets_iter ()
    134  {
    135    return hb_array (set_ptrs);
    136  }
    137 
    138  bool in_error () const
    139  {
    140    for (unsigned i = 0; i < num_sets (); i++)
    141    {
    142      if (unlikely (set_ptrs[i]->in_error ()))
    143        return true;
    144    }
    145 
    146    return axes_location.in_error ()
    147 #ifdef HB_EXPERIMENTAL_API
    148 || name_table_overrides.in_error ()
    149 #endif
    150 ;
    151  }
    152 };
    153 
    154 
    155 #endif /* HB_SUBSET_INPUT_HH */