thirdparty/freetype-2.3.12/src/cache/ftcimage.h

   1 /***************************************************************************/
   2 /*                                                                         */
   3 /*  ftcimage.h                                                             */
   4 /*                                                                         */
   5 /*    FreeType Generic Image cache (specification)                         */
   6 /*                                                                         */
   7 /*  Copyright 2000-2001, 2002, 2003, 2006 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  /*
  20   *  FTC_ICache is an _abstract_ cache used to store a single FT_Glyph
  21   *  image per cache node.
  22   *
  23   *  FTC_ICache extends FTC_GCache.  For an implementation example,
  24   *  see FTC_ImageCache in `src/cache/ftbasic.c'.
  25   */
  26
  27
  28   /*************************************************************************/
  29   /*                                                                       */
  30   /* Each image cache really manages FT_Glyph objects.                     */
  31   /*                                                                       */
  32   /*************************************************************************/
  33
  34
  35 #ifndef __FTCIMAGE_H__
  36 #define __FTCIMAGE_H__
  37
  38
  39 #include <ft2build.h>
  40 #include FT_CACHE_H
  41 #include "ftcglyph.h"
  42
  43 FT_BEGIN_HEADER
  44
  45
  46   /* the FT_Glyph image node type - we store only 1 glyph per node */
  47   typedef struct  FTC_INodeRec_
  48   {
  49     FTC_GNodeRec  gnode;
  50     FT_Glyph      glyph;
  51
  52   } FTC_INodeRec, *FTC_INode;
  53
  54 #define FTC_INODE( x )         ( (FTC_INode)( x ) )
  55 #define FTC_INODE_GINDEX( x )  FTC_GNODE(x)->gindex
  56 #define FTC_INODE_FAMILY( x )  FTC_GNODE(x)->family
  57
  58   typedef FT_Error
  59   (*FTC_IFamily_LoadGlyphFunc)( FTC_Family  family,
  60                                 FT_UInt     gindex,
  61                                 FTC_Cache   cache,
  62                                 FT_Glyph   *aglyph );
  63
  64   typedef struct  FTC_IFamilyClassRec_
  65   {
  66     FTC_MruListClassRec        clazz;
  67     FTC_IFamily_LoadGlyphFunc  family_load_glyph;
  68
  69   } FTC_IFamilyClassRec;
  70
  71   typedef const FTC_IFamilyClassRec*  FTC_IFamilyClass;
  72
  73 #define FTC_IFAMILY_CLASS( x )  ((FTC_IFamilyClass)(x))
  74
  75 #define FTC_CACHE__IFAMILY_CLASS( x ) \
  76           FTC_IFAMILY_CLASS( FTC_CACHE__GCACHE_CLASS(x)->family_class )
  77
  78
  79   /* can be used as a @FTC_Node_FreeFunc */
  80   FT_LOCAL( void )
  81   FTC_INode_Free( FTC_INode  inode,
  82                   FTC_Cache  cache );
  83
  84   /* Can be used as @FTC_Node_NewFunc.  `gquery.index' and `gquery.family'
  85    * must be set correctly.  This function will call the `family_load_glyph'
  86    * method to load the FT_Glyph into the cache node.
  87    */
  88   FT_LOCAL( FT_Error )
  89   FTC_INode_New( FTC_INode   *pinode,
  90                  FTC_GQuery   gquery,
  91                  FTC_Cache    cache );
  92
  93 #if 0
  94   /* can be used as @FTC_Node_WeightFunc */
  95   FT_LOCAL( FT_ULong )
  96   FTC_INode_Weight( FTC_INode  inode );
  97 #endif
  98
  99
 100  /* */
 101
 102 FT_END_HEADER
 103
 104 #endif /* __FTCIMAGE_H__ */
 105
 106
 107 /* END */