Line data    Source code

       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;                   /* Face index in a collection, zero-based. */
      54             :   mutable unsigned int upem;            /* Units-per-EM. */
      55             :   mutable unsigned int num_glyphs;      /* Number of glyphs. */
      56             : 
      57             :   enum dirty_t {
      58             :     NOTHING     = 0x0000,
      59             :     INDEX       = 0x0001,
      60             :     UPEM        = 0x0002,
      61             :     NUM_GLYPHS  = 0x0004,
      62             :   } dirty;
      63             : 
      64             :   struct hb_shaper_data_t shaper_data;  /* Various shaper data. */
      65             : 
      66             :   /* Various non-shaping data. */
      67             :   /* ... */
      68             : 
      69             :   /* Cache */
      70             :   struct plan_node_t {
      71             :     hb_shape_plan_t *shape_plan;
      72             :     plan_node_t *next;
      73             :   } *shape_plans;
      74             : 
      75             : 
      76          14 :   inline hb_blob_t *reference_table (hb_tag_t tag) const
      77             :   {
      78             :     hb_blob_t *blob;
      79             : 
      80          14 :     if (unlikely (!reference_table_func))
      81           0 :       return hb_blob_get_empty ();
      82             : 
      83          14 :     blob = reference_table_func (/*XXX*/const_cast<hb_face_t *> (this), tag, user_data);
      84          14 :     if (unlikely (!blob))
      85           2 :       return hb_blob_get_empty ();
      86             : 
      87          12 :     return blob;
      88             :   }
      89             : 
      90         187 :   inline HB_PURE_FUNC unsigned int get_upem (void) const
      91             :   {
      92         187 :     if (unlikely (!upem))
      93           2 :       load_upem ();
      94         187 :     return upem;
      95             :   }
      96             : 
      97           0 :   inline unsigned int get_num_glyphs (void) const
      98             :   {
      99           0 :     if (unlikely (num_glyphs == (unsigned int) -1))
     100           0 :       load_num_glyphs ();
     101           0 :     return num_glyphs;
     102             :   }
     103             : 
     104             :   private:
     105             :   HB_INTERNAL void load_upem (void) const;
     106             :   HB_INTERNAL void load_num_glyphs (void) const;
     107             : };
     108             : 
     109           0 : HB_MARK_AS_FLAG_T (hb_face_t::dirty_t);
     110             : 
     111             : extern HB_INTERNAL const hb_face_t _hb_face_nil;
     112             : 
     113             : #define HB_SHAPER_DATA_CREATE_FUNC_EXTRA_ARGS
     114             : #define HB_SHAPER_IMPLEMENT(shaper) HB_SHAPER_DATA_PROTOTYPE(shaper, face);
     115             : #include "hb-shaper-list.hh"
     116             : #undef HB_SHAPER_IMPLEMENT
     117             : #undef HB_SHAPER_DATA_CREATE_FUNC_EXTRA_ARGS
     118             : 
     119             : 
     120             : #endif /* HB_FACE_PRIVATE_HH */