lib/freetype/src/cache/ftcglyph.c

   1 /***************************************************************************/
   2 /*                                                                         */
   3 /*  ftcglyph.c                                                             */
   4 /*                                                                         */
   5 /*    FreeType Glyph Image (FT_Glyph) cache (body).                        */
   6 /*                                                                         */
   7 /*  Copyright 2000-2001 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 FT_CACHE_INTERNAL_GLYPH_H
  22 #include FT_ERRORS_H
  23 #include FT_LIST_H
  24 #include FT_INTERNAL_OBJECTS_H
  25 #include FT_INTERNAL_DEBUG_H
  26
  27 #include "ftcerror.h"
  28
  29
  30   /* create a new chunk node, setting its cache index and ref count */
  31   FT_EXPORT_DEF( void )
  32   ftc_glyph_node_init( FTC_GlyphNode     gnode,
  33                        FT_UInt           gindex,
  34                        FTC_GlyphFamily   gfam )
  35   {
  36     FT_UInt  len;
  37     FT_UInt  start = FTC_GLYPH_FAMILY_START( gfam, gindex );
  38
  39
  40     gnode->item_start = (FT_UShort)start;
  41
  42     len = gfam->item_total - start;
  43     if ( len > gfam->item_count )
  44       len = gfam->item_count;
  45
  46     gnode->item_count = (FT_UShort)len;
  47     gfam->family.num_nodes++;
  48   }
  49
  50
  51   FT_EXPORT_DEF( void )
  52   ftc_glyph_node_done( FTC_GlyphNode  gnode,
  53                        FTC_Cache      cache )
  54   {
  55     /* finalize the node */
  56     gnode->item_count = 0;
  57     gnode->item_start = 0;
  58
  59     ftc_node_done( FTC_NODE( gnode ), cache );
  60   }
  61
  62
  63   FT_EXPORT_DEF( FT_Bool )
  64   ftc_glyph_node_compare( FTC_GlyphNode   gnode,
  65                           FTC_GlyphQuery  gquery )
  66   {
  67     FT_UInt  start = (FT_UInt)gnode->item_start;
  68     FT_UInt  count = (FT_UInt)gnode->item_count;
  69
  70     return FT_BOOL( (FT_UInt)( gquery->gindex - start ) < count );
  71   }
  72
  73
  74   /*************************************************************************/
  75   /*************************************************************************/
  76   /*****                                                               *****/
  77   /*****                      CHUNK SETS                               *****/
  78   /*****                                                               *****/
  79   /*************************************************************************/
  80   /*************************************************************************/
  81
  82
  83   FT_EXPORT_DEF( FT_Error )
  84   ftc_glyph_family_init( FTC_GlyphFamily  gfam,
  85                          FT_UInt32        hash,
  86                          FT_UInt          item_count,
  87                          FT_UInt          item_total,
  88                          FTC_GlyphQuery   gquery,
  89                          FTC_Cache        cache )
  90   {
  91     FT_Error  error;
  92
  93
  94     error = ftc_family_init( FTC_FAMILY( gfam ), FTC_QUERY( gquery ), cache );
  95     if ( !error )
  96     {
  97       gfam->hash       = hash;
  98       gfam->item_total = item_total;
  99       gfam->item_count = item_count;
 100
 101       FTC_GLYPH_FAMILY_FOUND( gfam, gquery );
 102     }
 103
 104     return error;
 105   }
 106
 107
 108   FT_EXPORT_DEF( void )
 109   ftc_glyph_family_done( FTC_GlyphFamily  gfam )
 110   {
 111     ftc_family_done( FTC_FAMILY( gfam ) );
 112   }
 113
 114
 115 /* END */