third_party/harfbuzz-ng/src/hb-face-private.hh

   1 /*
   2  * Copyright © 2009  Red Hat, Inc.
   3  * Copyright © 2011  Google, Inc.
   4  *
   5  *  This is part of HarfBuzz, a text shaping library.
   6  *
   7  * Permission is hereby granted, without written agreement and without
   8  * license or royalty fees, to use, copy, modify, and distribute this
   9  * software and its documentation for any purpose, provided that the
  10  * above copyright notice and the following two paragraphs appear in
  11  * all copies of this software.
  12  *
  13  * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
  14  * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
  15  * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
  16  * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
  17  * DAMAGE.
  18  *
  19  * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
  20  * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
  21  * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
  22  * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
  23  * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
  24  *
  25  * Red Hat Author(s): Behdad Esfahbod
  26  * Google Author(s): Behdad Esfahbod
  27  */
  28
  29 #ifndef HB_FACE_PRIVATE_HH
  30 #define HB_FACE_PRIVATE_HH
  31
  32 #include "hb-private.hh"
  33
  34 #include "hb-object-private.hh"
  35 #include "hb-shaper-private.hh"
  36 #include "hb-shape-plan-private.hh"
  37
  38
  39 /*
  40  * hb_face_t
  41  */
  42
  43 struct hb_face_t {
  44   hb_object_header_t header;
  45   ASSERT_POD ();
  46
  47   hb_bool_t immutable;
  48
  49   hb_reference_table_func_t  reference_table_func;
  50   void                      *user_data;
  51   hb_destroy_func_t          destroy;
  52
  53   unsigned int index;
  54   mutable unsigned int upem;
  55   mutable unsigned int num_glyphs;
  56
  57   struct hb_shaper_data_t shaper_data;
  58
  59   struct plan_node_t {
  60     hb_shape_plan_t *shape_plan;
  61     plan_node_t *next;
  62   } *shape_plans;
  63
  64
  65   inline hb_blob_t *reference_table (hb_tag_t tag) const
  66   {
  67     hb_blob_t *blob;
  68
  69     if (unlikely (!reference_table_func))
  70       return hb_blob_get_empty ();
  71
  72     blob = reference_table_func (/*XXX*/const_cast<hb_face_t *> (this), tag, user_data);
  73     if (unlikely (!blob))
  74       return hb_blob_get_empty ();
  75
  76     return blob;
  77   }
  78
  79   inline HB_PURE_FUNC unsigned int get_upem (void) const
  80   {
  81     if (unlikely (!upem))
  82       load_upem ();
  83     return upem;
  84   }
  85
  86   inline unsigned int get_num_glyphs (void) const
  87   {
  88     if (unlikely (num_glyphs == (unsigned int) -1))
  89       load_num_glyphs ();
  90     return num_glyphs;
  91   }
  92
  93   private:
  94   HB_INTERNAL void load_upem (void) const;
  95   HB_INTERNAL void load_num_glyphs (void) const;
  96 };
  97
  98 extern HB_INTERNAL const hb_face_t _hb_face_nil;
  99
 100 #define HB_SHAPER_DATA_CREATE_FUNC_EXTRA_ARGS
 101 #define HB_SHAPER_IMPLEMENT(shaper) HB_SHAPER_DATA_PROTOTYPE(shaper, face);
 102 #include "hb-shaper-list.hh"
 103 #undef HB_SHAPER_IMPLEMENT
 104 #undef HB_SHAPER_DATA_CREATE_FUNC_EXTRA_ARGS
 105
 106
 107 #endif /* HB_FACE_PRIVATE_HH */