/****************************************************************************
*
* ftcimage.h
*
* FreeType Generic Image cache (specification)
*
* Copyright (C) 2000-2020 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 */
