source: trunk/poppler/freetype-2.1.10/include/freetype/cache/ftcimage.h @ 2

Last change on this file since 2 was 2, checked in by Eugene Romanenko, 15 years ago

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File size: 3.6 KB
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1/***************************************************************************/
2/*                                                                         */
3/*  ftcimage.h                                                             */
4/*                                                                         */
5/*    FreeType Generic Image cache (specification)                         */
6/*                                                                         */
7/*  Copyright 2000-2001, 2002, 2003 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 FT_CACHE_INTERNAL_GLYPH_H
42
43FT_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_EXPORT( 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_EXPORT( FT_Error )
89  FTC_INode_New( FTC_INode   *pinode,
90                 FTC_GQuery   gquery,
91                 FTC_Cache    cache );
92
93  /* can be used as @FTC_Node_WeightFunc */
94  FT_EXPORT( FT_ULong )
95  FTC_INode_Weight( FTC_INode  inode );
96
97 /* */
98
99FT_END_HEADER
100
101#endif /* __FTCIMAGE_H__ */
102
103
104/* END */
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