mirror of https://github.com/freetype/freetype
Werner Lemberg
parent
3dc4374f43
commit
dd33561ecb
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@ -0,0 +1 @@
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config.mk
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@ -23,11 +23,11 @@
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/* - Maintain a mapping between generic FTC_FaceIDs and live FT_Face */
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/* objects. The mapping itself is performed through a user-provided */
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/* callback. However, the manager maintains a small cache of FT_Face */
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/* & FT_Size objects in order to speed things considerably. */
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/* & FT_Size objects in order to speed up things considerably. */
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/* */
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/* - Manage one or more cache objects. Each cache is in charge of */
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/* holding a varying number of `cache nodes'. Each cache node */
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/* represents a minimal amount of individually-accessible cached */
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/* represents a minimal amount of individually accessible cached */
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/* data. For example, a cache node can be an FT_Glyph image */
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/* containing a vector outline, or some glyph metrics, or anything */
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/* else. */
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@ -81,40 +81,41 @@
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#define FTC_MAX_CACHES 16
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/****************************************************************
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*
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* <Struct> FTC_ManagerRec
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*
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* <Description>
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* the cache manager structure. Each cache manager is in
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* charge of performing two tasks:
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*
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* <Fields>
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* library :: handle to FreeType library instance
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* faces_lru :: lru list of FT_Face objects in cache
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* sizes_lru :: lru list of FT_Size objects in cache
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*
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* max_bytes :: maximum number of bytes to be allocated
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* in the cache. this is only related to
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* the byte size of the nodes cached by
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* the manager.
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*
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* num_bytes :: current number of bytes allocated in
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* the cache. only related to the byte size
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* of cached nodes.
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*
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* num_nodes :: current number of nodes in the manager
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*
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* global_lru :: the global lru list of all cache nodes
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*
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* caches :: a table of installed/registered cache
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* objects
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*
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* request_data :: user-provided data passed to the requester
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* request_face :: user-provided function used to implement
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* a mapping between abstract FTC_FaceIDs
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* and real FT_Face objects..
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*/
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/*************************************************************************/
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/* */
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/* <Struct> */
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/* FTC_ManagerRec */
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/* */
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/* <Description> */
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/* The cache manager structure. */
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/* */
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/* <Fields> */
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/* library :: A handle to a FreeType library instance. */
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/* */
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/* faces_lru :: The lru list of FT_Face objects in the cache. */
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/* */
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/* sizes_lru :: The lru list of FT_Size objects in the cache. */
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/* */
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/* max_bytes :: The maximum number of bytes to be allocated in the */
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/* cache. This is only related to the byte size of */
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/* the nodes cached by the manager. */
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/* */
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/* num_bytes :: The current number of bytes allocated in the */
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/* cache. Only related to the byte size of cached */
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/* nodes. */
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/* */
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/* num_nodes :: The current number of nodes in the manager. */
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/* */
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/* global_lru :: The global lru list of all cache nodes. */
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/* */
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/* caches :: A table of installed/registered cache objects. */
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/* */
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/* request_data :: User-provided data passed to the requester. */
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/* */
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/* request_face :: User-provided function used to implement a mapping */
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/* between abstract FTC_FaceIDs and real FT_Face */
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/* objects. */
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/* */
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typedef struct FTC_ManagerRec_
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{
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FT_Library library;
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@ -133,28 +134,27 @@
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} FTC_ManagerRec;
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/**********************************************************************
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*
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* <Function> FTC_Manager_Compress
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*
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* <Description>
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* this function is used to check the state of the cache manager
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* if its "num_bytes" field is greater than its "max_bytes"
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* field, this function will flush as many old cache nodes as
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* possible (ignoring cache nodes with a non-zero reference
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* count).
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*
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* <input>
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* manager :: handle to cache manager
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*
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* <note>
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* client applications should not call this function directly.
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* it is normally invoked by specific cache implementations.
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*
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* the reason this function is exported is to allow client-
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* specific cache classes..
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*
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*/
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/*************************************************************************/
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/* */
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/* <Function> */
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/* FTC_Manager_Compress */
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/* */
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/* <Description> */
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/* This function is used to check the state of the cache manager if */
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/* its `num_bytes' field is greater than its `max_bytes' field. It */
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/* will flush as many old cache nodes as possible (ignoring cache */
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/* nodes with a non-zero reference count). */
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/* */
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/* <Input> */
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/* manager :: A handle to the cache manager. */
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/* */
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/* <Note> */
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/* Client applications should not call this function directly. It is */
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/* normally invoked by specific cache implementations. */
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/* */
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/* The reason this function is exported is to allow client-specific */
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/* cache classes. */
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/* */
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FT_EXPORT_DEF( void ) FTC_Manager_Compress( FTC_Manager manager );
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@ -182,7 +182,7 @@
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typedef FTC_CacheNodeRec* FTC_CacheNode;
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/* the fields `cachenode.data' is typecasted to this type */
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/* the field `cachenode.data' is typecast to this type */
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typedef struct FTC_CacheNode_Data_
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{
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FT_UShort cache_index;
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@ -190,63 +190,73 @@
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} FTC_CacheNode_Data;
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/* return a pointer to the FTC_CacheNode_Data contained in a */
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/* CacheNode's `data' field */
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/* return a pointer to FTC_CacheNode_Data contained in a */
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/* CacheNode's `data' field */
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#define FTC_CACHENODE_TO_DATA_P( n ) \
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( (FTC_CacheNode_Data*)&(n)->data )
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#define FTC_LIST_TO_CACHENODE( n ) ( (FTC_CacheNode)(n) )
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/**********************************************************************
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*
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* <FuncType> FTC_CacheNode_SizeFunc
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*
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* <Description>
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* a function used to compute the total size in bytes of a given
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* cache node. It is used by the cache manager to compute the
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* number of old nodes to flush when the cache is full..
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*
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* <Input>
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* node :: handle to target cache node
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* cache_data :: a generic pointer passed to the destructor.
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*/
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/*************************************************************************/
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/* */
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/* <FuncType> */
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/* FTC_CacheNode_SizeFunc */
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/* */
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/* <Description> */
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/* A function used to compute the total size in bytes of a given */
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/* cache node. It is used by the cache manager to compute the number */
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/* of old nodes to flush when the cache is full. */
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/* */
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/* <Input> */
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/* node :: A handle to the target cache node. */
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/* */
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/* cache_data :: A generic pointer passed to the destructor. */
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/* */
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typedef FT_ULong (*FTC_CacheNode_SizeFunc)( FTC_CacheNode node,
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FT_Pointer cache_data );
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/**********************************************************************
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*
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* <FuncType> FTC_CacheNode_DestroyFunc
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*
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* <Description>
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* a function used to destroy a given cache node. It is called
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* by the manager when the cache is full and old nodes need to
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* be flushed out..
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*
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* <Input>
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* node :: handle to target cache node
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* cache_data :: a generic pointer passed to the destructor.
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*/
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/*************************************************************************/
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/* */
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/* <FuncType> */
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/* FTC_CacheNode_DestroyFunc */
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/* */
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/* <Description> */
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/* A function used to destroy a given cache node. It is called by */
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/* the manager when the cache is full and old nodes need to be */
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/* flushed out. */
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/* */
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/* <Input> */
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/* node :: A handle to the target cache node. */
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/* */
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/* cache_data :: A generic pointer passed to the destructor. */
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/* */
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typedef void (*FTC_CacheNode_DestroyFunc)( FTC_CacheNode node,
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FT_Pointer cache_data );
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/**********************************************************************
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*
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* <Struct> FTC_CacheNode_Class
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*
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* <Description>
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* a very simple structure used to describe a cache node's class
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* to the cache manager
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*
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* <Fields>
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* size_node :: a function used to size the node
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* destroy_node :: a function used to destroy the node
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*
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* <Note>
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* the cache node class doesn't include a "new_node" function
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* because the cache manager never allocates cache node directly,
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* it delegates this task to its cache objects..
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*
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*/
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/*************************************************************************/
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/* */
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/* <Struct> */
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/* FTC_CacheNode_Class */
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/* */
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/* <Description> */
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/* A very simple structure used to describe a cache node's class to */
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/* the cache manager. */
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/* */
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/* <Fields> */
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/* size_node :: A function used to size the node. */
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/* */
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/* destroy_node :: A function used to destroy the node. */
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/* */
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/* <Note> */
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/* The cache node class doesn't include a `new_node' function because */
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/* the cache manager never allocates cache node directly; it */
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/* delegates this task to its cache objects. */
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/* */
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/* */
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typedef struct FTC_CacheNode_Class_
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{
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FTC_CacheNode_SizeFunc size_node;
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/*************************************************************************/
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/**********************************************************************
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*
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* <FuncType> FTC_Cache_InitFunc
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*
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* <Description>
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* a function used to initialize a given cache object
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*
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* <Input>
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* cache :: handle to new cache
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*/
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/*************************************************************************/
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/* */
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/* <FuncType> */
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/* FTC_Cache_InitFunc */
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/* */
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/* <Description> */
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/* A function used to initialize a given cache object. */
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/* */
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/* <Input> */
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/* cache :: A handle to the new cache. */
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/* */
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typedef FT_Error (*FTC_Cache_InitFunc)( FTC_Cache cache );
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/**********************************************************************
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*
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* <FuncType> FTC_Cache_DoneFunc
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*
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* <Description>
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* a function used to finalize a given cache object
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*
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* <Input>
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* cache :: handle to target cache
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*/
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typedef void (*FTC_Cache_DoneFunc)( FTC_Cache cache );
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/*************************************************************************/
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/* */
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/* <FuncType> */
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/* FTC_Cache_DoneFunc */
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/* */
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/* <Description> */
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/* A function to finalize a given cache object. */
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/* */
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/* <Input> */
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/* cache :: A handle to the target cache. */
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/* */
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typedef void (*FTC_Cache_DoneFunc)( FTC_Cache cache );
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/**********************************************************************
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*
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* <Struct> FTC_Cache_Class
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*
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* <Description>
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* a structure used to describe a given cache object class to
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* the cache manager.
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*
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* <Fields>
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* cache_byte_size :: size of cache object in bytes
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* init_cache :: cache object initializer
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* done_cache :: cache object finalizer
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*/
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/*************************************************************************/
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/* */
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/* <Struct> */
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/* FTC_Cache_Class */
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/* */
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/* <Description> */
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/* A structure used to describe a given cache object class to the */
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/* cache manager. */
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/* */
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/* <Fields> */
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/* cache_byte_size :: The size of the cache object in bytes. */
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/* */
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/* init_cache :: The cache object initializer. */
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/* */
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/* done_cache :: The cache object finalizer. */
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/* */
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struct FTC_Cache_Class_
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{
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FT_UInt cache_byte_size;
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};
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/**********************************************************************
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*
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* <Struct> FTC_CacheRec
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*
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* <Description>
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* a structure used to describe an abstract cache object
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*
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* <Fields>
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* manager :: handle to parent cache manager
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* memory :: handle to memory manager
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* clazz :: pointer to cache clazz
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* node_clazz :: pointer to cache's node clazz
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*
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* cache_index :: index of cache in manager's table
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* cache_data :: data passed to the cache node constructor/finalizer
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*/
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/*************************************************************************/
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/* */
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/* <Struct> */
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/* FTC_CacheRec */
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/* */
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/* <Description> */
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/* A structure used to describe an abstract cache object. */
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/* */
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/* <Fields> */
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/* manager :: A handle to the parent cache manager. */
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/* */
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/* memory :: A handle to the memory manager. */
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/* */
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/* clazz :: A pointer to the cache class. */
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/* */
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/* node_clazz :: A pointer to the cache's node class. */
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/* */
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/* cache_index :: An index of the cache in the manager's table. */
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/* */
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/* cache_data :: Data passed to the cache node */
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/* constructor/finalizer. */
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/* */
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typedef struct FTC_CacheRec_
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{
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FTC_Manager manager;
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} FTC_CacheRec;
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#ifdef __cplusplus
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}
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#endif
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@ -2,7 +2,7 @@
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/* */
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/* ftcsbits.h */
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/* */
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/* a small-bitmaps cache (specification). */
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/* A small-bitmap cache (specification). */
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/* */
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/* Copyright 2000 by */
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/* David Turner, Robert Wilhelm, and Werner Lemberg. */
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/* */
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/***************************************************************************/
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#ifndef FTCSBITS_H
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#define FTCSBITS_H
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#include <freetype/cache/ftcchunk.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* handle to small bitmap */
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typedef struct FTC_SBitRec_* FTC_SBit;
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/* handle to small bitmap */
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typedef struct FTC_SBitRec_* FTC_SBit;
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/* handle to small bitmap cache */
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typedef struct FTC_SBit_CacheRec_* FTC_SBit_Cache;
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/* handle to small bitmap cache */
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typedef struct FTC_SBit_CacheRec_* FTC_SBit_Cache;
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/* a compact structure used to hold a single small bitmap */
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typedef struct FTC_SBitRec_
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/* a compact structure used to hold a single small bitmap */
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typedef struct FTC_SBitRec_
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{
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FT_Byte width;
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FT_Byte height;
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@ -50,16 +52,13 @@
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} FTC_SBitRec;
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FT_EXPORT_DEF( FT_Error )
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FTC_SBit_Cache_New( FTC_Manager manager,
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FTC_SBit_Cache *acache );
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FT_EXPORT_DEF( FT_Error ) FTC_SBit_Cache_New( FTC_Manager manager,
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FTC_SBit_Cache* acache );
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FT_EXPORT_DEF( FT_Error )
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FTC_SBit_Cache_Lookup( FTC_SBit_Cache cache,
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FTC_Image_Desc* desc,
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FT_UInt gindex,
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FTC_SBit *sbit );
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FT_EXPORT_DEF( FT_Error ) FTC_SBit_Cache_Lookup( FTC_SBit_Cache cache,
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FTC_Image_Desc* desc,
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FT_UInt gindex,
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FTC_SBit *sbit );
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#ifdef __cplusplus
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@ -69,5 +68,5 @@
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#endif /* FTCSBITS_H */
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/* END */
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/* END */
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