+++ /dev/null
-/***************************************************************************/
-/* */
-/* ftcglyph.h */
-/* */
-/* FreeType abstract glyph cache (specification). */
-/* */
-/* Copyright 2000-2001 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. */
-/* */
-/***************************************************************************/
-
-
- /*************************************************************************/
- /* */
- /* Important: The functions defined in this file are only used to */
- /* implement an abstract glyph cache class. You need to */
- /* provide additional logic to implement a complete cache. */
- /* For example, see `ftcimage.h' and `ftcimage.c' which */
- /* implement a FT_Glyph cache based on this code. */
- /* */
- /* NOTE: For now, each glyph set is implemented as a static hash table. */
- /* It would be interesting to experiment with dynamic hashes to */
- /* see whether this improves performance or not (I don't know why */
- /* but something tells me it won't). */
- /* */
- /* In all cases, this change should not affect any derived glyph */
- /* cache class. */
- /* */
- /*************************************************************************/
-
-
- /*************************************************************************/
- /*************************************************************************/
- /*************************************************************************/
- /*************************************************************************/
- /*************************************************************************/
- /********* *********/
- /********* WARNING, THIS IS BETA CODE. *********/
- /********* *********/
- /*************************************************************************/
- /*************************************************************************/
- /*************************************************************************/
- /*************************************************************************/
- /*************************************************************************/
-
-
-#ifndef __FTCGLYPH_H__
-#define __FTCGLYPH_H__
-
-
-#include <ft2build.h>
-#include FT_CACHE_H
-#include FT_CACHE_MANAGER_H
-
-#include <stddef.h>
-
-
-FT_BEGIN_HEADER
-
-
- /* maximum number of glyph sets per glyph cache; must be < 256 */
-#define FTC_MAX_GLYPH_SETS 16
-#define FTC_GSET_HASH_SIZE_DEFAULT 64
-
-
- typedef struct FTC_GlyphSetRec_* FTC_GlyphSet;
- typedef struct FTC_GlyphNodeRec_* FTC_GlyphNode;
- typedef struct FTC_Glyph_CacheRec_* FTC_Glyph_Cache;
-
- typedef struct FTC_GlyphNodeRec_
- {
- FTC_CacheNodeRec root;
- FTC_GlyphNode gset_next; /* next in glyph set's bucket list */
- FT_UShort glyph_index;
- FT_UShort gset_index;
-
- } FTC_GlyphNodeRec;
-
-
-#define FTC_GLYPHNODE( x ) ( (FTC_GlyphNode)( x ) )
-#define FTC_GLYPHNODE_TO_LRUNODE( n ) ( (FT_ListNode)( n ) )
-#define FTC_LRUNODE_TO_GLYPHNODE( n ) ( (FTC_GlyphNode)( n ) )
-
-
- /*************************************************************************/
- /* */
- /* Glyph set methods. */
- /* */
-
- typedef FT_Error
- (*FTC_GlyphSet_InitFunc)( FTC_GlyphSet gset,
- FT_Pointer type );
-
- typedef void
- (*FTC_GlyphSet_DoneFunc)( FTC_GlyphSet gset );
-
- typedef FT_Bool
- (*FTC_GlyphSet_CompareFunc)( FTC_GlyphSet gset,
- FT_Pointer type );
-
-
- typedef FT_Error
- (*FTC_GlyphSet_NewNodeFunc)( FTC_GlyphSet gset,
- FT_UInt gindex,
- FTC_GlyphNode* anode );
-
- typedef void
- (*FTC_GlyphSet_DestroyNodeFunc)( FTC_GlyphNode node,
- FTC_GlyphSet gset );
-
- typedef FT_ULong
- (*FTC_GlyphSet_SizeNodeFunc)( FTC_GlyphNode node,
- FTC_GlyphSet gset );
-
-
- typedef struct FTC_GlyphSet_Class_
- {
- FT_UInt gset_byte_size;
-
- FTC_GlyphSet_InitFunc init;
- FTC_GlyphSet_DoneFunc done;
- FTC_GlyphSet_CompareFunc compare;
-
- FTC_GlyphSet_NewNodeFunc new_node;
- FTC_GlyphSet_SizeNodeFunc size_node;
- FTC_GlyphSet_DestroyNodeFunc destroy_node;
-
- } FTC_GlyphSet_Class;
-
-
- typedef struct FTC_GlyphSetRec_
- {
- FTC_Glyph_Cache cache;
- FTC_Manager manager;
- FT_Memory memory;
- FTC_GlyphSet_Class* clazz;
- FT_UInt hash_size;
- FTC_GlyphNode* buckets;
- FT_UInt gset_index; /* index in parent cache */
-
- } FTC_GlyphSetRec;
-
-
- /* the abstract glyph cache class */
- typedef struct FTC_Glyph_Cache_Class_
- {
- FTC_Cache_Class root;
- FTC_GlyphSet_Class* gset_class;
-
- } FTC_Glyph_Cache_Class;
-
-
- /* the abstract glyph cache object */
- typedef struct FTC_Glyph_CacheRec_
- {
- FTC_CacheRec root;
- FT_Lru gsets_lru; /* static sets lru list */
- FTC_GlyphSet last_gset; /* small cache :-) */
- FTC_GlyphSet_CompareFunc compare; /* useful shortcut */
-
- } FTC_Glyph_CacheRec;
-
-
- /*************************************************************************/
- /* */
- /* These functions are exported so that they can be called from */
- /* user-provided cache classes; otherwise, they are really part of the */
- /* cache sub-system internals. */
- /* */
-
- FT_EXPORT( void )
- FTC_GlyphNode_Init( FTC_GlyphNode node,
- FTC_GlyphSet gset,
- FT_UInt gindex );
-
-#define FTC_GlyphNode_Ref( n ) \
- FTC_CACHENODE_TO_DATA_P( &(n)->root )->ref_count++
-
-#define FTC_GlyphNode_Unref( n ) \
- FTC_CACHENODE_TO_DATA_P( &(n)->root )->ref_count--
-
-
- FT_EXPORT( void )
- FTC_GlyphNode_Destroy( FTC_GlyphNode node,
- FTC_Glyph_Cache cache );
-
- FT_EXPORT( FT_Error )
- FTC_Glyph_Cache_Init( FTC_Glyph_Cache cache );
-
- FT_EXPORT( void )
- FTC_Glyph_Cache_Done( FTC_Glyph_Cache cache );
-
-
- FT_EXPORT( FT_Error )
- FTC_GlyphSet_New( FTC_Glyph_Cache cache,
- FT_Pointer type,
- FTC_GlyphSet *aset );
-
- FT_EXPORT( FT_Error )
- FTC_GlyphSet_Lookup_Node( FTC_GlyphSet gset,
- FT_UInt glyph_index,
- FTC_GlyphNode *anode );
-
- FT_EXPORT( FT_Error )
- FTC_Glyph_Cache_Lookup( FTC_Glyph_Cache cache,
- FT_Pointer type,
- FT_UInt gindex,
- FTC_GlyphNode *anode );
-
-
-FT_END_HEADER
-
-#endif /* __FTCGLYPH_H__ */
-
-
-/* END */
projects / rrdtool.git / blobdiff