This function is used to check the state of the cache manager if its `num_bytes' field is greater than its `max_bytes' field. It will flush as many old cache nodes as possible (ignoring cache nodes with a non-zero reference count).
Input / Output:
manager :: A handle to the cache manager.
Notes: Client applications should not call this function directly. It is normally invoked by specific cache implementations. The reason this function is exported is to allow client-specific cache classes. FT_EXPORT( void ) FTC_Manager_Compress( FTC_Manager manager ); **** CACHE NODE DEFINITIONS **** **** Each cache controls one or more cache nodes. Each node is part of the global_lru list of the manager. Its `data' field however is used as a reference count for now. A node can be anything, depending on the type of information held by the cache. It can be an individual glyph image, a set of bitmaps glyphs for a given size, some metrics, etc. typedef FT_ListNodeRec FTC_CacheNodeRec; typedef FTC_CacheNodeRec* FTC_CacheNode; the field `cachenode.data' is typecast to this type typedef struct FTC_CacheNode_Data_ { FT_UShort cache_index; FT_Short ref_count; } FTC_CacheNode_Data; return a pointer to FTC_CacheNode_Data contained in a CacheNode's `data' field #define FTC_CACHENODE_TO_DATA_P( n ) ( (FTC_CacheNode_Data*)&(n)->data ) #define FTC_LIST_TO_CACHENODE( n ) ( (FTC_CacheNode)(n) ) FTC_CacheNode_SizeFunc
A function used to compute the total size in bytes of a given cache node. It is used by the cache manager to compute the number of old nodes to flush when the cache is full.
Input:
node :: A handle to the target cache node.
cache_data :: A generic pointer passed to the destructor. This function is used to check the state of the cache manager if its `num_bytes' field is greater than its `max_bytes' field. It will flush as many old cache nodes as possible (ignoring cache nodes with a non-zero reference count).
Input / Output:
manager :: A handle to the cache manager.
Notes: Client applications should not call this function directly. It is normally invoked by specific cache implementations. The reason this function is exported is to allow client-specific cache classes. FT_EXPORT( void ) FTC_Manager_Compress( FTC_Manager manager ); **** CACHE NODE DEFINITIONS **** **** Each cache controls one or more cache nodes. Each node is part of the global_lru list of the manager. Its `data' field however is used as a reference count for now. A node can be anything, depending on the type of information held by the cache. It can be an individual glyph image, a set of bitmaps glyphs for a given size, some metrics, etc. typedef FT_ListNodeRec FTC_CacheNodeRec; typedef FTC_CacheNodeRec* FTC_CacheNode; the field `cachenode.data' is typecast to this type typedef struct FTC_CacheNode_Data_ { FT_UShort cache_index; FT_Short ref_count; } FTC_CacheNode_Data; return a pointer to FTC_CacheNode_Data contained in a CacheNode's `data' field #define FTC_CACHENODE_TO_DATA_P( n ) ( (FTC_CacheNode_Data*)&(n)->data ) #define FTC_LIST_TO_CACHENODE( n ) ( (FTC_CacheNode)(n) ) FTC_CacheNode_SizeFunc
A function used to compute the total size in bytes of a given cache node. It is used by the cache manager to compute the number of old nodes to flush when the cache is full.
Input:
node :: A handle to the target cache node.
cache_data :: A generic pointer passed to the destructor.
A function used to destroy a given cache node. It is called by the manager when the cache is full and old nodes need to be flushed out.
Input:
node :: A handle to the target cache node.
cache_data :: A generic pointer passed to the destructor. typedef void (*FTC_CacheNode_DestroyFunc)( FTC_CacheNode node, FT_Pointer cache_data );
The size of a given cache node in bytes. typedef FT_ULong (*FTC_CacheNode_SizeFunc)( FTC_CacheNode node, FT_Pointer cache_data ); FTC_CacheNode_DestroyFunc
This documentation was generated for Freetype 2.0.4 by autodocbook (http://www.stillhq.com). Autodocbook is (c) Michael Still 2001.
Copyright 1996-2000 by
David Turner, Robert Wilhelm, and Werner Lemberg.
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