/***************************************************************************/

/*                                                                         */

/*  ftcimage.h                                                             */

/*                                                                         */

/*    FreeType Generic Image cache (specification)                         */

/*                                                                         */

/*  Copyright 2000-2001, 2002, 2003, 2006 by                               */

/*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */

/*                                                                         */

/*  This file is part of the FreeType project, and may only be used,       */

/*  modified, and distributed under the terms of the FreeType project      */

/*  license, LICENSE.TXT.  By continuing to use, modify, or distribute     */

/*  this file you indicate that you have read the license and              */

/*  understand and accept it fully.                                        */

/*                                                                         */

/***************************************************************************/





 /*

  *  FTC_ICache is an _abstract_ cache used to store a single FT_Glyph

  *  image per cache node.

  *

  *  FTC_ICache extends FTC_GCache.  For an implementation example,

  *  see FTC_ImageCache in `src/cache/ftbasic.c'.

  */





  /*************************************************************************/

  /*                                                                       */

  /* Each image cache really manages FT_Glyph objects.                     */

  /*                                                                       */

  /*************************************************************************/





#ifndef __FTCIMAGE_H__

#define __FTCIMAGE_H__





#include <ft2build.h>

#include FT_CACHE_H

#include "ftcglyph.h"



FT_BEGIN_HEADER





  /* the FT_Glyph image node type - we store only 1 glyph per node */

  typedef struct  FTC_INodeRec_

  {

    FTC_GNodeRec  gnode;

    FT_Glyph      glyph;



  } FTC_INodeRec, *FTC_INode;



#define FTC_INODE( x )         ( (FTC_INode)( x ) )

#define FTC_INODE_GINDEX( x )  FTC_GNODE(x)->gindex

#define FTC_INODE_FAMILY( x )  FTC_GNODE(x)->family



  typedef FT_Error

  (*FTC_IFamily_LoadGlyphFunc)( FTC_Family  family,

                                FT_UInt     gindex,

                                FTC_Cache   cache,

                                FT_Glyph   *aglyph );



  typedef struct  FTC_IFamilyClassRec_

  {

    FTC_MruListClassRec        clazz;

    FTC_IFamily_LoadGlyphFunc  family_load_glyph;



  } FTC_IFamilyClassRec;



  typedef const FTC_IFamilyClassRec*  FTC_IFamilyClass;



#define FTC_IFAMILY_CLASS( x )  ((FTC_IFamilyClass)(x))



#define FTC_CACHE__IFAMILY_CLASS( x ) \

          FTC_IFAMILY_CLASS( FTC_CACHE__GCACHE_CLASS(x)->family_class )





  /* can be used as a @FTC_Node_FreeFunc */

  FT_LOCAL( void )

  FTC_INode_Free( FTC_INode  inode,

                  FTC_Cache  cache );



  /* Can be used as @FTC_Node_NewFunc.  `gquery.index' and `gquery.family'

   * must be set correctly.  This function will call the `family_load_glyph'

   * method to load the FT_Glyph into the cache node.

   */

  FT_LOCAL( FT_Error )

  FTC_INode_New( FTC_INode   *pinode,

                 FTC_GQuery   gquery,

                 FTC_Cache    cache );



#if 0

  /* can be used as @FTC_Node_WeightFunc */

  FT_LOCAL( FT_ULong )

  FTC_INode_Weight( FTC_INode  inode );

#endif





 /* */



FT_END_HEADER



#endif /* __FTCIMAGE_H__ */





/* END */

