thirdparty/freetype-2.3.12/src/cache/ftcglyph.c

   1 /***************************************************************************/
   2 /*                                                                         */
   3 /*  ftcglyph.c                                                             */
   4 /*                                                                         */
   5 /*    FreeType Glyph Image (FT_Glyph) cache (body).                        */
   6 /*                                                                         */
   7 /*  Copyright 2000-2001, 2003, 2004, 2006, 2009 by                         */
   8 /*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
   9 /*                                                                         */
  10 /*  This file is part of the FreeType project, and may only be used,       */
  11 /*  modified, and distributed under the terms of the FreeType project      */
  12 /*  license, LICENSE.TXT.  By continuing to use, modify, or distribute     */
  13 /*  this file you indicate that you have read the license and              */
  14 /*  understand and accept it fully.                                        */
  15 /*                                                                         */
  16 /***************************************************************************/
  17
  18
  19 #include <ft2build.h>
  20 #include FT_CACHE_H
  21 #include "ftcglyph.h"
  22 #include FT_ERRORS_H
  23
  24 #include "ftccback.h"
  25 #include "ftcerror.h"
  26
  27
  28   /* create a new chunk node, setting its cache index and ref count */
  29   FT_LOCAL_DEF( void )
  30   FTC_GNode_Init( FTC_GNode   gnode,
  31                   FT_UInt     gindex,
  32                   FTC_Family  family )
  33   {
  34     gnode->family = family;
  35     gnode->gindex = gindex;
  36     family->num_nodes++;
  37   }
  38
  39
  40   FT_LOCAL_DEF( void )
  41   FTC_GNode_UnselectFamily( FTC_GNode  gnode,
  42                             FTC_Cache  cache )
  43   {
  44     FTC_Family  family = gnode->family;
  45
  46
  47     gnode->family = NULL;
  48     if ( family && --family->num_nodes == 0 )
  49       FTC_FAMILY_FREE( family, cache );
  50   }
  51
  52
  53   FT_LOCAL_DEF( void )
  54   FTC_GNode_Done( FTC_GNode  gnode,
  55                   FTC_Cache  cache )
  56   {
  57     /* finalize the node */
  58     gnode->gindex = 0;
  59
  60     FTC_GNode_UnselectFamily( gnode, cache );
  61   }
  62
  63
  64   FT_LOCAL_DEF( FT_Bool )
  65   ftc_gnode_compare( FTC_Node    ftcgnode,
  66                      FT_Pointer  ftcgquery,
  67                      FTC_Cache   cache )
  68   {
  69     FTC_GNode   gnode  = (FTC_GNode)ftcgnode;
  70     FTC_GQuery  gquery = (FTC_GQuery)ftcgquery;
  71     FT_UNUSED( cache );
  72
  73
  74     return FT_BOOL( gnode->family == gquery->family &&
  75                     gnode->gindex == gquery->gindex );
  76   }
  77
  78
  79   FT_LOCAL_DEF( FT_Bool )
  80   FTC_GNode_Compare( FTC_GNode   gnode,
  81                      FTC_GQuery  gquery )
  82   {
  83     return ftc_gnode_compare( FTC_NODE( gnode ), gquery, NULL );
  84   }
  85
  86
  87   /*************************************************************************/
  88   /*************************************************************************/
  89   /*****                                                               *****/
  90   /*****                      CHUNK SETS                               *****/
  91   /*****                                                               *****/
  92   /*************************************************************************/
  93   /*************************************************************************/
  94
  95   FT_LOCAL_DEF( void )
  96   FTC_Family_Init( FTC_Family  family,
  97                    FTC_Cache   cache )
  98   {
  99     FTC_GCacheClass  clazz = FTC_CACHE__GCACHE_CLASS( cache );
 100
 101
 102     family->clazz     = clazz->family_class;
 103     family->num_nodes = 0;
 104     family->cache     = cache;
 105   }
 106
 107
 108   FT_LOCAL_DEF( FT_Error )
 109   ftc_gcache_init( FTC_Cache  ftccache )
 110   {
 111     FTC_GCache  cache = (FTC_GCache)ftccache;
 112     FT_Error    error;
 113
 114
 115     error = FTC_Cache_Init( FTC_CACHE( cache ) );
 116     if ( !error )
 117     {
 118       FTC_GCacheClass   clazz = (FTC_GCacheClass)FTC_CACHE( cache )->org_class;
 119
 120       FTC_MruList_Init( &cache->families,
 121                         clazz->family_class,
 122                         0,  /* no maximum here! */
 123                         cache,
 124                         FTC_CACHE( cache )->memory );
 125     }
 126
 127     return error;
 128   }
 129
 130
 131 #if 0
 132
 133   FT_LOCAL_DEF( FT_Error )
 134   FTC_GCache_Init( FTC_GCache  cache )
 135   {
 136     return ftc_gcache_init( FTC_CACHE( cache ) );
 137   }
 138
 139 #endif /* 0 */
 140
 141
 142   FT_LOCAL_DEF( void )
 143   ftc_gcache_done( FTC_Cache  ftccache )
 144   {
 145     FTC_GCache  cache = (FTC_GCache)ftccache;
 146
 147
 148     FTC_Cache_Done( (FTC_Cache)cache );
 149     FTC_MruList_Done( &cache->families );
 150   }
 151
 152
 153 #if 0
 154
 155   FT_LOCAL_DEF( void )
 156   FTC_GCache_Done( FTC_GCache  cache )
 157   {
 158     ftc_gcache_done( FTC_CACHE( cache ) );
 159   }
 160
 161 #endif /* 0 */
 162
 163
 164   FT_LOCAL_DEF( FT_Error )
 165   FTC_GCache_New( FTC_Manager       manager,
 166                   FTC_GCacheClass   clazz,
 167                   FTC_GCache       *acache )
 168   {
 169     return FTC_Manager_RegisterCache( manager, (FTC_CacheClass)clazz,
 170                                       (FTC_Cache*)acache );
 171   }
 172
 173
 174 #ifndef FTC_INLINE
 175
 176   FT_LOCAL_DEF( FT_Error )
 177   FTC_GCache_Lookup( FTC_GCache   cache,
 178                      FT_UInt32    hash,
 179                      FT_UInt      gindex,
 180                      FTC_GQuery   query,
 181                      FTC_Node    *anode )
 182   {
 183     FT_Error  error;
 184
 185
 186     query->gindex = gindex;
 187
 188     FTC_MRULIST_LOOKUP( &cache->families, query, query->family, error );
 189     if ( !error )
 190     {
 191       FTC_Family  family = query->family;
 192
 193
 194       /* prevent the family from being destroyed too early when an        */
 195       /* out-of-memory condition occurs during glyph node initialization. */
 196       family->num_nodes++;
 197
 198       error = FTC_Cache_Lookup( FTC_CACHE( cache ), hash, query, anode );
 199
 200       if ( --family->num_nodes == 0 )
 201         FTC_FAMILY_FREE( family, cache );
 202     }
 203     return error;
 204   }
 205
 206 #endif /* !FTC_INLINE */
 207
 208
 209 /* END */