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freetype2
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completed the sbit cache, though it's still buggy :-( 

major reformatting of the cache subsystem (again)
added substantial documentation too in header files
This commit is contained in:
David Turner 2000-10-28 23:34:45 +00:00
parent 241cc2cc4f
commit 7d0f1137db
14 changed files with 798 additions and 402 deletions
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28
include/freetype/cache/ftcchunk.h vendored
View File

@ -58,11 +58,11 @@
#define FTC_MAX_CHUNK_SETS 16
typedef struct FTC_ChunkRec_* FTC_Chunk;
typedef struct FTC_ChunkNodeRec_* FTC_ChunkNode;
typedef struct FTC_ChunkSetRec_* FTC_ChunkSet;
typedef struct FTC_Chunk_CacheRec_* FTC_Chunk_Cache;
typedef struct FTC_ChunkRec_
typedef struct FTC_ChunkNodeRec_
{
FTC_CacheNodeRec root;
FTC_ChunkSet cset;
@ -70,14 +70,21 @@
FT_UShort num_elements;
FT_Byte* elements;
} FTC_ChunkRec;
} FTC_ChunkNodeRec;
#define FTC_CHUNKNODE_TO_LRUNODE(x) ((FT_ListNode)(x))
#define FTC_LRUNODE_TO_CHUNKNODE(x) ((FTC_ChunkNode)(x))
/*************************************************************************/
/* */
/* chunk set methods */
/* */
/* used to set "element_max", "element_count" and "element_size" */
typedef FT_Error (*FTC_ChunkSet_SizesFunc) ( FTC_ChunkSet cset,
FT_Pointer type );
typedef FT_Error (*FTC_ChunkSet_InitFunc) ( FTC_ChunkSet cset,
FT_Pointer type );
@ -100,11 +107,12 @@
typedef struct FTC_ChunkSet_Class_
{
FT_UInt cset_size;
FT_UInt cset_byte_size;
FTC_ChunkSet_InitFunc init;
FTC_ChunkSet_DoneFunc done;
FTC_ChunkSet_CompareFunc compare;
FTC_ChunkSet_SizesFunc sizes;
FTC_ChunkSet_NewNodeFunc new_node;
FTC_ChunkSet_SizeNodeFunc size_node;
@ -119,11 +127,12 @@
FTC_Manager manager;
FT_Memory memory;
FTC_ChunkSet_Class* clazz;
FT_UInt cset_index; /* index in parent cache */
FT_UInt cset_index; /* index in parent cache */
FT_UInt element_max; /* maximum number of elements */
FT_UInt element_size; /* element size in bytes */
FT_UInt element_count; /* number of elements per chunk */
FT_UInt num_chunks;
FTC_ChunkNode* chunks;
@ -145,7 +154,7 @@
FTC_CacheRec root;
FT_Lru csets_lru; /* static chunk set lru list */
FTC_ChunkSet last_cset; /* small cache :-) */
} FTC_Chunk_CacheRec;
/*************************************************************************/
@ -155,7 +164,7 @@
/* cache sub-system internals. */
/* */
FT_EXPORT_FUNC( NV_Error )
FT_EXPORT_FUNC( FT_Error )
FTC_ChunkNode_Init( FTC_ChunkNode node,
FTC_ChunkSet cset,
FT_UInt index,
@ -186,10 +195,7 @@
FT_EXPORT_DEF( FT_Error )
FTC_ChunkSet_New( FTC_Chunk_Cache cache,
FT_Pointer type,
FT_UInt num_elements,
FT_UInt element_size,
FT_UInt chunk_size,
FTC_ChunkSet *aset )
FTC_ChunkSet *aset );
FT_EXPORT_DEF( FT_Error )

12
include/freetype/cache/ftcglyph.h vendored
View File

@ -2,7 +2,7 @@
/* */
/* ftcglyph.h */
/* */
/* FreeType glyph image (FT_Glyph) cache (specification). */
/* FreeType abstract glyph cache (specification). */
/* */
/* Copyright 2000 by */
/* David Turner, Robert Wilhelm, and Werner Lemberg. */
@ -24,6 +24,14 @@
/* 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's be interesting to experiment with dynamic hashes to see */
/* if 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.. */
/* */
/*************************************************************************/
@ -147,7 +155,7 @@
{
FTC_CacheRec root;
FT_Lru gsets_lru; /* static sets lru list */
FTC_GlyphSet last_gset; /* small cache :-) */
FTC_GlyphSet last_gset; /* small cache :o) */
} FTC_Glyph_CacheRec;

190
include/freetype/cache/ftcimage.h vendored Normal file
View File

@ -0,0 +1,190 @@
/***************************************************************************/
/* */
/* ftcimage.c */
/* */
/* FreeType Image cache (body). */
/* */
/* Each image cache really manages FT_Glyph objects :-) */
/* */
/* */
/* Copyright 2000 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. */
/* */
/***************************************************************************/
#ifndef FTCIMAGE_H
#define FTCIMAGE_H
#include <freetype/cache/ftcglyph.h>
#include <freetype/ftglyph.h>
#ifdef __cplusplus
extern "C" {
#endif
/*************************************************************************/
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** IMAGE CACHE OBJECT *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
/*************************************************************************/
#define FTC_IMAGE_FORMAT( x ) ( (x) & 7 )
/*************************************************************************/
/* */
/* <Enum> */
/* FTC_Image_Type */
/* */
/* <Description> */
/* An enumeration used to list the types of glyph images found in a */
/* glyph image cache. */
/* */
/* <Fields> */
/* ftc_image_mono :: Monochrome bitmap glyphs. */
/* */
/* ftc_image_grays :: Anti-aliased bitmap glyphs. */
/* */
/* ftc_image_outline :: Scaled (and hinted) outline glyphs. */
/* */
/* ftc_master_outline :: Unscaled original outline glyphs. */
/* */
/* <Note> */
/* Other types may be defined in the future. */
/* */
typedef enum FTC_Image_Type_
{
ftc_image_format_bitmap = 0,
ftc_image_format_outline = 1,
ftc_image_flag_monochrome = 16,
ftc_image_flag_unhinted = 32,
ftc_image_flag_autohinted = 64,
ftc_image_flag_unscaled = 128,
ftc_image_flag_no_sbits = 256,
ftc_image_mono = ftc_image_format_bitmap |
ftc_image_flag_monochrome, /* monochrome bitmap */
ftc_image_grays = ftc_image_format_bitmap, /* anti-aliased bitmap */
ftc_image_outline = ftc_image_format_outline /* scaled outline */
} FTC_Image_Type;
/*************************************************************************/
/* */
/* <Struct> */
/* FTC_Image_Desc */
/* */
/* <Description> */
/* A simple structure used to describe a given glyph image category. */
/* */
/* <Fields> */
/* size :: An FTC_SizeRec used to describe the glyph's face & */
/* size. */
/* */
/* image_type :: The glyph image's type. */
/* */
typedef struct FTC_Image_Desc_
{
FTC_FontRec font;
FT_UInt image_type;
} FTC_Image_Desc;
/*************************************************************************/
/* */
/* <Type> */
/* FTC_Image_Cache */
/* */
/* <Description> */
/* A handle to an glyph image cache object. They are designed to */
/* hold many distinct glyph images, while not exceeding a certain */
/* memory threshold. */
/* */
typedef struct FTC_Image_CacheRec_* FTC_Image_Cache;
/*************************************************************************/
/* */
/* <Function> */
/* FTC_Image_Cache_New */
/* */
/* <Description> */
/* Creates a new glyph image cache. */
/* */
/* <Input> */
/* manager :: The parent manager for the image cache. */
/* */
/* <Output> */
/* acache :: A handle to the new glyph image cache object. */
/* */
/* <Return> */
/* FreeType error code. 0 means success. */
/* */
FT_EXPORT_DEF( FT_Error ) FTC_Image_Cache_New( FTC_Manager manager,
FTC_Image_Cache* acache );
/*************************************************************************/
/* */
/* <Function> */
/* FTC_Image_Cache_Lookup */
/* */
/* <Description> */
/* Retrieves a given glyph image from a glyph image cache. */
/* */
/* <Input> */
/* cache :: A handle to the source glyph image cache. */
/* */
/* desc :: A pointer to a glyph image descriptor. */
/* */
/* gindex :: The glyph index to retrieve. */
/* */
/* <Output> */
/* aglyph :: The corresponding FT_Glyph object. 0 in case of */
/* failure. */
/* */
/* <Return> */
/* error code, 0 means success */
/* */
/* <Note> */
/* the returned glyph is owned and manager by the glyph image cache. */
/* Never try to transform or discard it manually! You can however */
/* create a copy with FT_Glyph_Copy() and modify the new one. */
/* */
/* Because the glyph image cache limits the total amount of memory */
/* taken by the glyphs it holds, the returned glyph might disappear */
/* on a later invocation of this function! It's a cache after all... */
/* */
FT_EXPORT_DEF( FT_Error )
FTC_Image_Cache_Lookup( FTC_Image_Cache cache,
FTC_Image_Desc* desc,
FT_UInt gindex,
FT_Glyph* aglyph );
#ifdef __cplusplus
}
#endif
#endif /* FTCIMAGE_H */
/* END */

175
include/freetype/cache/ftcmanag.h vendored
View File

@ -73,7 +73,6 @@
#endif
/* default values */
#define FTC_MAX_FACES_DEFAULT 2
#define FTC_MAX_SIZES_DEFAULT 4
#define FTC_MAX_BYTES_DEFAULT 200000 /* 200kByte by default! */
@ -82,6 +81,40 @@
#define FTC_MAX_CACHES 16
/****************************************************************
*
* <Struct> FTC_ManagerRec
*
* <Description>
* the cache manager structure. Each cache manager is in
* charge of performing two tasks:
*
* <Fields>
* library :: handle to FreeType library instance
* faces_lru :: lru list of FT_Face objects in cache
* sizes_lru :: lru list of FT_Size objects in cache
*
* max_bytes :: maximum number of bytes to be allocated
* in the cache. this is only related to
* the byte size of the nodes cached by
* the manager.
*
* num_bytes :: current number of bytes allocated in
* the cache. only related to the byte size
* of cached nodes.
*
* num_nodes :: current number of nodes in the manager
*
* global_lru :: the global lru list of all cache nodes
*
* caches :: a table of installed/registered cache
* objects
*
* request_data :: user-provided data passed to the requester
* request_face :: user-provided function used to implement
* a mapping between abstract FTC_FaceIDs
* and real FT_Face objects..
*/
typedef struct FTC_ManagerRec_
{
FT_Library library;
@ -90,6 +123,7 @@
FT_ULong max_bytes;
FT_ULong num_bytes;
FT_UInt num_nodes;
FT_ListRec global_lru;
FTC_Cache caches[FTC_MAX_CACHES];
@ -99,6 +133,31 @@
} FTC_ManagerRec;
/**********************************************************************
*
* <Function> FTC_Manager_Compress
*
* <Description>
* this function is used to check the state of the cache manager
* if its "num_bytes" field is greater than its "max_bytes"
* field, this function will flush as many old cache nodes as
* possible (ignoring cache nodes with a non-zero reference
* count).
*
* <input>
* manager :: handle to cache manager
*
* <note>
* 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_DEF( void ) FTC_Manager_Compress( FTC_Manager manager );
/*************************************************************************/
/*************************************************************************/
/***** *****/
@ -138,19 +197,56 @@
#define FTC_LIST_TO_CACHENODE( n ) ( (FTC_CacheNode)(n) )
/* return the size in bytes of a given cache node */
/**********************************************************************
*
* <FuncType> FTC_CacheNode_SizeFunc
*
* <Description>
* 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 :: handle to target cache node
* cache_data :: a generic pointer passed to the destructor.
*/
typedef FT_ULong (*FTC_CacheNode_SizeFunc)( FTC_CacheNode node,
FT_Pointer user );
FT_Pointer cache_data );
/* finalize a given cache node */
/**********************************************************************
*
* <FuncType> FTC_CacheNode_DestroyFunc
*
* <Description>
* 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 :: handle to target cache node
* cache_data :: a generic pointer passed to the destructor.
*/
typedef void (*FTC_CacheNode_DestroyFunc)( FTC_CacheNode node,
FT_Pointer user );
FT_Pointer cache_data );
/* This structure is used to provide functions to the cache manager. */
/* It will use them to size and destroy cache nodes. Note that there */
/* is no `init_node' because cache objects are entirely responsible */
/* for the creation of new cache nodes. */
/* */
/**********************************************************************
*
* <Struct> FTC_CacheNode_Class
*
* <Description>
* a very simple structure used to describe a cache node's class
* to the cache manager
*
* <Fields>
* size_node :: a function used to size the node
* destroy_node :: a function used to destroy the node
*
* <Note>
* the cache node class doesn't include a "new_node" function
* because the cache manager never allocates cache node directly,
* it delegates this task to its cache objects..
*
*/
typedef struct FTC_CacheNode_Class_
{
FTC_CacheNode_SizeFunc size_node;
@ -168,10 +264,45 @@
/*************************************************************************/
/**********************************************************************
*
* <FuncType> FTC_Cache_InitFunc
*
* <Description>
* a function used to initialize a given cache object
*
* <Input>
* cache :: handle to new cache
*/
typedef FT_Error (*FTC_Cache_InitFunc)( FTC_Cache cache );
/**********************************************************************
*
* <FuncType> FTC_Cache_DoneFunc
*
* <Description>
* a function used to finalize a given cache object
*
* <Input>
* cache :: handle to target cache
*/
typedef void (*FTC_Cache_DoneFunc)( FTC_Cache cache );
/**********************************************************************
*
* <Struct> FTC_Cache_Class
*
* <Description>
* a structure used to describe a given cache object class to
* the cache manager.
*
* <Fields>
* cache_byte_size :: size of cache object in bytes
* init_cache :: cache object initializer
* done_cache :: cache object finalizer
*/
struct FTC_Cache_Class_
{
FT_UInt cache_byte_size;
@ -179,6 +310,23 @@
FTC_Cache_DoneFunc done_cache;
};
/**********************************************************************
*
* <Struct> FTC_CacheRec
*
* <Description>
* a structure used to describe an abstract cache object
*
* <Fields>
* manager :: handle to parent cache manager
* memory :: handle to memory manager
* clazz :: pointer to cache clazz
* node_clazz :: pointer to cache's node clazz
*
* cache_index :: index of cache in manager's table
* cache_data :: data passed to the cache node constructor/finalizer
*/
typedef struct FTC_CacheRec_
{
FTC_Manager manager;
@ -187,16 +335,11 @@
FTC_CacheNode_Class* node_clazz;
FT_UInt cache_index; /* in manager's table */
FT_Pointer cache_user; /* passed to cache node methods */
FT_Pointer cache_data; /* passed to cache node methods */
} FTC_CacheRec;
/* `Compress' the manager's data, i.e., get rid of old cache nodes */
/* that are not referenced anymore in order to limit the total */
/* memory used by the cache. */
FT_EXPORT_DEF( void ) FTC_Manager_Compress( FTC_Manager manager );
#ifdef __cplusplus
}

36
src/cache/ftcsbits.h → include/freetype/cache/ftcsbits.h vendored
View File

@ -32,49 +32,24 @@
typedef struct FTC_SBit_CacheRec_* FTC_SBit_Cache;
/* format of small bitmaps */
typedef enum FTC_SBit_Format_
{
ftc_sbit_format_mono = 0,
ftc_sbit_format_aa256 = 1,
} FTC_SBit_Format;
/* a compact structure used to hold a single small bitmap */
typedef struct FTC_SBitRec_
{
FT_Byte width;
FT_Byte height;
FT_SChar left;
FT_SChar top;
FT_Char left;
FT_Char top;
FT_Byte format;
FT_SChar pitch;
FT_SChar xadvance;
FT_SChar yadvance;
FT_Char pitch;
FT_Char xadvance;
FT_Char yadvance;
FT_Byte* buffer;
} FTC_SBitRec;
typedef struct FTC_SBitSetRec_
{
FTC_ChunkSetRec root;
FTC_Image_Desc desc;
} FTC_SBitSet;
typedef struct FTC_SBit_CacheRec_
{
FTC_Chunk_CacheRec root;
} FTC_SBit_CacheRec;
FT_EXPORT_DEF( FT_Error )
FTC_SBit_Cache_New( FTC_Manager manager,
FTC_SBit_Cache *acache );
@ -83,6 +58,7 @@
FT_EXPORT_DEF( FT_Error )
FTC_SBit_Cache_Lookup( FTC_SBit_Cache cache,
FTC_Image_Desc* desc,
FT_UInt gindex,
FTC_SBit *sbit );

20
include/freetype/cache/ftlru.h vendored
View File

@ -72,7 +72,7 @@
typedef FT_Pointer FT_LruKey;
/* an lru node -- node.root.data points to the element */
/* an lru node -- root.data points to the element */
typedef struct FT_LruNodeRec_
{
FT_ListNodeRec root;
@ -80,6 +80,8 @@
} FT_LruNodeRec, *FT_LruNode;
/* forward declaration */
typedef struct FT_LruRec_* FT_Lru;
@ -94,8 +96,8 @@
FT_LruNode node );
/* this method is used to finalize a given list element node */
void (*done_element)( FT_Lru lru,
FT_LruNode node );
void (*done_element)( FT_Lru lru,
FT_LruNode node );
/* If defined, this method is called when the list if full */
/* during the lookup process -- it is used to change the contents */
@ -145,10 +147,11 @@
FT_Memory memory,
FT_Bool pre_alloc,
FT_Lru* alru );
FT_EXPORT_DEF( void ) FT_Lru_Reset( FT_Lru lru );
FT_EXPORT_DEF( void ) FT_Lru_Done( FT_Lru lru );
FT_EXPORT_DEF( void ) FT_Lru_Reset( FT_Lru lru );
FT_EXPORT_DEF( void ) FT_Lru_Done ( FT_Lru lru );
FT_EXPORT_DEF( FT_Error ) FT_Lru_Lookup_Node( FT_Lru lru,
FT_LruKey key,
@ -157,7 +160,8 @@
FT_EXPORT_DEF( FT_Error ) FT_Lru_Lookup( FT_Lru lru,
FT_LruKey key,
FT_Pointer* aobject );
FT_EXPORT_DEF( void ) FT_Lru_Remove_Node( FT_Lru lru,
FT_LruNode node );

154
include/freetype/ftcache.h
View File

@ -90,6 +90,11 @@
/* <Return> */
/* FreeType error code. 0 means success. */
/* */
/* <Note> */
/* the face requester should not perform funny things on the returned */
/* face object, like creating a new FT_Size for it, or setting a */
/* transform through FT_Set_Transform !! */
/* */
typedef FT_Error (*FTC_Face_Requester)( FTC_FaceID face_id,
FT_Library library,
FT_Pointer request_data,
@ -307,7 +312,7 @@
FTC_Font font,
FT_Face* aface,
FT_Size* asize );
/* a cache class is used to describe a unique cache type to the manager */
typedef struct FTC_Cache_Class_ FTC_Cache_Class;
@ -321,153 +326,6 @@
FTC_Cache* acache );
/*************************************************************************/
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** IMAGE CACHE OBJECT *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
/*************************************************************************/
#define FTC_IMAGE_FORMAT( x ) ( (x) & 7 )
/*************************************************************************/
/* */
/* <Enum> */
/* FTC_Image_Type */
/* */
/* <Description> */
/* An enumeration used to list the types of glyph images found in a */
/* glyph image cache. */
/* */
/* <Fields> */
/* ftc_image_mono :: Monochrome bitmap glyphs. */
/* */
/* ftc_image_grays :: Anti-aliased bitmap glyphs. */
/* */
/* ftc_image_outline :: Scaled (and hinted) outline glyphs. */
/* */
/* ftc_master_outline :: Unscaled original outline glyphs. */
/* */
/* <Note> */
/* Other types may be defined in the future. */
/* */
typedef enum FTC_Image_Type_
{
ftc_image_format_bitmap = 0,
ftc_image_format_outline = 1,
ftc_image_flag_monochrome = 16,
ftc_image_flag_unhinted = 32,
ftc_image_flag_autohinted = 64,
ftc_image_flag_unscaled = 128,
ftc_image_flag_no_sbits = 256,
ftc_image_mono = ftc_image_format_bitmap |
ftc_image_flag_monochrome, /* monochrome bitmap */
ftc_image_grays = ftc_image_format_bitmap, /* anti-aliased bitmap */
ftc_image_outline = ftc_image_format_outline /* scaled outline */
} FTC_Image_Type;
/*************************************************************************/
/* */
/* <Struct> */
/* FTC_Image_Desc */
/* */
/* <Description> */
/* A simple structure used to describe a given glyph image category. */
/* */
/* <Fields> */
/* size :: An FTC_SizeRec used to describe the glyph's face & */
/* size. */
/* */
/* image_type :: The glyph image's type. */
/* */
typedef struct FTC_Image_Desc_
{
FTC_FontRec font;
FT_UInt image_type;
} FTC_Image_Desc;
/*************************************************************************/
/* */
/* <Type> */
/* FTC_Image_Cache */
/* */
/* <Description> */
/* A handle to an glyph image cache object. They are designed to */
/* hold many distinct glyph images, while not exceeding a certain */
/* memory threshold. */
/* */
typedef struct FTC_Image_CacheRec_* FTC_Image_Cache;
/*************************************************************************/
/* */
/* <Function> */
/* FTC_Image_Cache_New */
/* */
/* <Description> */
/* Creates a new glyph image cache. */
/* */
/* <Input> */
/* manager :: The parent manager for the image cache. */
/* */
/* <Output> */
/* acache :: A handle to the new glyph image cache object. */
/* */
/* <Return> */
/* FreeType error code. 0 means success. */
/* */
FT_EXPORT_DEF( FT_Error ) FTC_Image_Cache_New( FTC_Manager manager,
FTC_Image_Cache* acache );
/*************************************************************************/
/* */
/* <Function> */
/* FTC_Image_Cache_Lookup */
/* */
/* <Description> */
/* Retrieves a given glyph image from a glyph image cache. */
/* */
/* <Input> */
/* cache :: A handle to the source glyph image cache. */
/* */
/* desc :: A pointer to a glyph image descriptor. */
/* */
/* gindex :: The glyph index to retrieve. */
/* */
/* <Output> */
/* aglyph :: The corresponding FT_Glyph object. 0 in case of */
/* failure. */
/* */
/* <Return> */
/* error code, 0 means success */
/* */
/* <Note> */
/* the returned glyph is owned and manager by the glyph image cache. */
/* Never try to transform or discard it manually! You can however */
/* create a copy with FT_Glyph_Copy() and modify the new one. */
/* */
/* Because the glyph image cache limits the total amount of memory */
/* taken by the glyphs it holds, the returned glyph might disappear */
/* on a later invocation of this function! It's a cache after all... */
/* */
FT_EXPORT_DEF( FT_Error )
FTC_Image_Cache_Lookup( FTC_Image_Cache cache,
FTC_Image_Desc* desc,
FT_UInt gindex,
FT_Glyph* aglyph );
#ifdef __cplusplus
}
#endif

4
src/cache/ftcache.c vendored
View File

@ -23,14 +23,18 @@
#include "ftlru.c"
#include "ftcmanag.c"
#include "ftcglyph.c"
#include "ftcchunk.c"
#include "ftcimage.c"
#include "ftcsbits.c"
#else
#include <cache/ftlru.c>
#include <cache/ftcmanag.c>
#include <cache/ftcglyph.c>
#include <cache/ftcchunk.c>
#include <cache/ftcimage.c>
#include <cache/ftcsbits.c>
#endif

64
src/cache/ftcchunk.c vendored
View File

@ -16,7 +16,7 @@
/***************************************************************************/
#include <freetype/cache/ftcglyph.h>
#include <freetype/cache/ftcchunk.h>
#include <freetype/fterrors.h>
#include <freetype/internal/ftobjs.h>
#include <freetype/internal/ftlist.h>
@ -33,7 +33,7 @@
/* create a new chunk node, setting its cache index and ref count */
FT_EXPORT_FUNC( NV_Error )
FT_EXPORT_FUNC( FT_Error )
FTC_ChunkNode_Init( FTC_ChunkNode node,
FTC_ChunkSet cset,
FT_UInt index,
@ -41,22 +41,25 @@
{
FTC_Chunk_Cache cache = cset->cache;
FTC_CacheNode_Data* data = FTC_CACHENODE_TO_DATA_P( &node->root );
NV_Error error = 0;
FT_Error error = 0;
data->cache_index = (FT_UShort) cache->root.cache_index;
data->ref_count = (FT_Short) 0;
node->cset_index = (FT_UShort) index;
node->num_elements = (index+1 < cset->chunk_count)
? cset->chunk_size
: cset->element_max - cset->chunk_count*index;
node->num_elements = (index+1 < cset->element_count)
? cset->element_count * cset->element_size
: cset->element_max - cset->element_count*index;
if (alloc)
{
/* allocate elements array */
FT_Memory memory;
memory = cache->root.memory;
error = MEM_ALLOC( cache->elements, cset->element_size *
cset->element_count );
error = MEM_Alloc( node->elements, cset->element_size *
cset->element_count );
}
return error;
}
@ -79,7 +82,7 @@
FTC_ChunkSet cset = node->cset;
return cset->clazz->size_node( node, cset );
return cset->clazz->size_node( node );
}
@ -102,9 +105,6 @@
FT_EXPORT_FUNC( FT_Error )
FTC_ChunkSet_New( FTC_Chunk_Cache cache,
FT_Pointer type,
FT_UInt num_elements,
FT_UInt element_size,
FT_UInt chunk_size,
FTC_ChunkSet *aset )
{
FT_Error error;
@ -121,19 +121,22 @@
*aset = 0;
if ( ALLOC( set, clazz->cset_byte_size ) )
if ( ALLOC( cset, clazz->cset_byte_size ) )
goto Exit;
cset->cache = cache;
cset->manager = manager;
cset->memory = memory;
cset->element_max = num_elements;
cset->element_size = element_size;
cset->element_count = chunk_size;
cset->clazz = clazz;
/* now compute element_max, element_count and element_size */
error = clazz->sizes( cset, type);
if (error)
goto Exit;
/* compute maximum number of nodes */
cset->num_chunks = (num_elements + (chunk_size-1))/chunk_size;
cset->num_chunks = (cset->element_max +
cset->element_count - 1) / cset->element_count;
/* allocate chunk pointers table */
if ( ALLOC_ARRAY( cset->chunks, cset->num_chunks, FTC_ChunkNode ) )
@ -165,7 +168,7 @@
FTC_Chunk_Cache cache = cset->cache;
FTC_Manager manager = cache->root.manager;
FT_List glyphs_lru = &manager->global_lru;
FTC_ChunkNode* bucket = cset->chunk;
FTC_ChunkNode* bucket = cset->chunks;
FTC_ChunkNode* bucket_limit = bucket + cset->num_chunks;
FT_Memory memory = cache->root.memory;
@ -181,6 +184,7 @@
lrunode = FTC_CHUNKNODE_TO_LRUNODE( node );
manager->num_bytes -= clazz->size_node( node );
manaher->num_nodes --;
FT_List_Remove( glyphs_lru, lrunode );
@ -201,21 +205,21 @@
FTC_ChunkSet_Lookup_Node( FTC_ChunkSet cset,
FT_UInt glyph_index,
FTC_ChunkNode *anode,
FTC_UInt *index )
FT_UInt *aindex )
{
FTC_Glyph_Cache cache = cset->cache;
FTC_Chunk_Cache cache = cset->cache;
FTC_Manager manager = cache->root.manager;
FT_Error error = 0;
FTC_GlyphSet_Class* clazz = cset->clazz;
FTC_ChunkSet_Class* clazz = cset->clazz;
*anode = 0;
if (glyph_index >= cset->elements_max)
if (glyph_index >= cset->element_max)
error = FT_Err_Invalid_Argument;
else
{
FT_UInt chunk_size = cset->chunk_size;
FT_UInt chunk_size = cset->element_count;
FT_UInt chunk_index = glyph_index/chunk_size;
FTC_ChunkNode* pnode = cset->chunks + chunk_index;
FTC_ChunkNode node = *pnode;
@ -233,7 +237,8 @@
/* insert the node at the start the global LRU glyph list */
FT_List_Insert( &manager->global_lru, FTC_CHUNKNODE_TO_LRUNODE( node ) );
manager->num_bytes += clazz->size_node( node, gset );
manager->num_bytes += clazz->size_node( node );
manager->num_nodes ++;
if (manager->num_bytes > manager->max_bytes)
{
@ -287,7 +292,7 @@
{
/* good, now set the set index within the set object */
cset->cset_index = node - lru->nodes;
node->root.data = set;
node->root.data = cset;
}
return error;
@ -347,15 +352,8 @@
cache->root.node_clazz =
(FTC_CacheNode_Class*)&ftc_chunk_cache_node_class;
/* The following is extremely important for ftc_destroy_glyph_image() */
/* to work properly, as the second parameter that is sent to it */
/* through the cache manager is `user_data' and must be set to */
/* `cache' here. */
/* */
cache->root.cache_user = cache;
error = FT_Lru_New( &ftc_chunk_set_lru_class,
FTC_MAX_GLYPH_CSETS,
FTC_MAX_CHUNK_SETS,
cache,
memory,
1, /* pre_alloc == TRUE */

14
src/cache/ftcglyph.c vendored
View File

@ -50,9 +50,9 @@
/* Important: This function is called from the cache manager to */
/* destroy a given cache node during `cache compression'. The */
/* second argument is always `cache.user_data'. Thus be */
/* second argument is always `cache.cache_data'. Thus be */
/* certain that the function FTC_Glyph_Cache_New() does indeed */
/* set its `user_data' field correctly, otherwise bad things */
/* set its `cache_data' field correctly, otherwise bad things */
/* will happen! */
FT_EXPORT_FUNC( void ) FTC_GlyphNode_Destroy( FTC_GlyphNode node,
@ -120,7 +120,7 @@
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** GLYPH QUEUES *****/
/***** GLYPH SETS *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
@ -204,6 +204,7 @@
lrunode = FTC_GLYPHNODE_TO_LRUNODE( node );
manager->num_bytes -= clazz->size_node( node, gset );
manager->num_nodes --;
FT_List_Remove( glyphs_lru, lrunode );
@ -273,6 +274,7 @@
FT_List_Insert( &manager->global_lru, FTC_GLYPHNODE_TO_LRUNODE( node ) );
manager->num_bytes += clazz->size_node( node, gset );
manager->num_nodes ++;
if (manager->num_bytes > manager->max_bytes)
{
@ -365,7 +367,7 @@
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** GLYPH IMAGE CACHE OBJECTS *****/
/***** GLYPH CACHE OBJECTS *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
@ -383,10 +385,10 @@
/* The following is extremely important for ftc_destroy_glyph_image() */
/* to work properly, as the second parameter that is sent to it */
/* through the cache manager is `user_data' and must be set to */
/* through the cache manager is `cache_data' and must be set to */
/* `cache' here. */
/* */
cache->root.cache_user = cache;
cache->root.cache_data = cache;
error = FT_Lru_New( &ftc_glyph_set_lru_class,
FTC_MAX_GLYPH_SETS,

35
src/cache/ftcimage.c vendored
View File

@ -16,15 +16,36 @@
/***************************************************************************/
#ifdef FT_FLAT_COMPILE
# include "ftcimage.h"
#else
# include <cache/ftcimage.h>
#endif
#include <freetype/cache/ftcimage.h>
#include <freetype/internal/ftmemory.h>
#include <string.h>
#include <freetype/internal/ftmemory.h>
/* the FT_Glyph image "glyph node" type */
typedef struct FTC_GlyphImageRec_
{
FTC_GlyphNodeRec root;
FT_Glyph ft_glyph;
} FTC_GlyphImageRec, *FTC_GlyphImage;
/* the glyph image queue type */
typedef struct FTC_ImageSetRec_
{
FTC_GlyphSetRec root;
FTC_Image_Desc description;
} FTC_ImageSetRec, *FTC_ImageSet;
typedef struct FTC_Image_CacheRec_
{
FTC_Glyph_CacheRec root;
} FTC_Image_CacheRec;
/*************************************************************************/
@ -180,7 +201,7 @@
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** GLYPH IMAGE QUEUES *****/
/***** GLYPH IMAGE SETS *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/

160
src/cache/ftcimage.h vendored
View File

@ -4,6 +4,9 @@
/* */
/* FreeType Image cache (body). */
/* */
/* Each image cache really manages FT_Glyph objects :-) */
/* */
/* */
/* Copyright 2000 by */
/* David Turner, Robert Wilhelm, and Werner Lemberg. */
/* */
@ -23,34 +26,157 @@
#include <freetype/cache/ftcglyph.h>
#include <freetype/ftglyph.h>
#ifdef __cplusplus
extern "C" {
#endif
/* the FT_Glyph image "glyph node" type */
typedef struct FTC_GlyphImageRec_
/*************************************************************************/
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** IMAGE CACHE OBJECT *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
/*************************************************************************/
#define FTC_IMAGE_FORMAT( x ) ( (x) & 7 )
/*************************************************************************/
/* */
/* <Enum> */
/* FTC_Image_Type */
/* */
/* <Description> */
/* An enumeration used to list the types of glyph images found in a */
/* glyph image cache. */
/* */
/* <Fields> */
/* ftc_image_mono :: Monochrome bitmap glyphs. */
/* */
/* ftc_image_grays :: Anti-aliased bitmap glyphs. */
/* */
/* ftc_image_outline :: Scaled (and hinted) outline glyphs. */
/* */
/* ftc_master_outline :: Unscaled original outline glyphs. */
/* */
/* <Note> */
/* Other types may be defined in the future. */
/* */
typedef enum FTC_Image_Type_
{
FTC_GlyphNodeRec root;
FT_Glyph ft_glyph;
ftc_image_format_bitmap = 0,
ftc_image_format_outline = 1,
} FTC_GlyphImageRec, *FTC_GlyphImage;
ftc_image_flag_monochrome = 16,
ftc_image_flag_unhinted = 32,
ftc_image_flag_autohinted = 64,
ftc_image_flag_unscaled = 128,
ftc_image_flag_no_sbits = 256,
ftc_image_mono = ftc_image_format_bitmap |
ftc_image_flag_monochrome, /* monochrome bitmap */
ftc_image_grays = ftc_image_format_bitmap, /* anti-aliased bitmap */
ftc_image_outline = ftc_image_format_outline /* scaled outline */
} FTC_Image_Type;
/* the glyph image queue type */
typedef struct FTC_ImageSetRec_
/*************************************************************************/
/* */
/* <Struct> */
/* FTC_Image_Desc */
/* */
/* <Description> */
/* A simple structure used to describe a given glyph image category. */
/* */
/* <Fields> */
/* size :: An FTC_SizeRec used to describe the glyph's face & */
/* size. */
/* */
/* image_type :: The glyph image's type. */
/* */
typedef struct FTC_Image_Desc_
{
FTC_GlyphSetRec root;
FTC_Image_Desc description;
} FTC_ImageSetRec, *FTC_ImageSet;
FTC_FontRec font;
FT_UInt image_type;
} FTC_Image_Desc;
typedef struct FTC_Image_CacheRec_
{
FTC_Glyph_CacheRec root;
} FTC_Image_CacheRec;
/*************************************************************************/
/* */
/* <Type> */
/* FTC_Image_Cache */
/* */
/* <Description> */
/* A handle to an glyph image cache object. They are designed to */
/* hold many distinct glyph images, while not exceeding a certain */
/* memory threshold. */
/* */
typedef struct FTC_Image_CacheRec_* FTC_Image_Cache;
/*************************************************************************/
/* */
/* <Function> */
/* FTC_Image_Cache_New */
/* */
/* <Description> */
/* Creates a new glyph image cache. */
/* */
/* <Input> */
/* manager :: The parent manager for the image cache. */
/* */
/* <Output> */
/* acache :: A handle to the new glyph image cache object. */
/* */
/* <Return> */
/* FreeType error code. 0 means success. */
/* */
FT_EXPORT_DEF( FT_Error ) FTC_Image_Cache_New( FTC_Manager manager,
FTC_Image_Cache* acache );
/*************************************************************************/
/* */
/* <Function> */
/* FTC_Image_Cache_Lookup */
/* */
/* <Description> */
/* Retrieves a given glyph image from a glyph image cache. */
/* */
/* <Input> */
/* cache :: A handle to the source glyph image cache. */
/* */
/* desc :: A pointer to a glyph image descriptor. */
/* */
/* gindex :: The glyph index to retrieve. */
/* */
/* <Output> */
/* aglyph :: The corresponding FT_Glyph object. 0 in case of */
/* failure. */
/* */
/* <Return> */
/* error code, 0 means success */
/* */
/* <Note> */
/* the returned glyph is owned and manager by the glyph image cache. */
/* Never try to transform or discard it manually! You can however */
/* create a copy with FT_Glyph_Copy() and modify the new one. */
/* */
/* Because the glyph image cache limits the total amount of memory */
/* taken by the glyphs it holds, the returned glyph might disappear */
/* on a later invocation of this function! It's a cache after all... */
/* */
FT_EXPORT_DEF( FT_Error )
FTC_Image_Cache_Lookup( FTC_Image_Cache cache,
FTC_Image_Desc* desc,
FT_UInt gindex,
FT_Glyph* aglyph );
#ifdef __cplusplus

16
src/cache/ftcmanag.c vendored
View File

@ -54,7 +54,8 @@
{
/* destroy initial size object; it will be re-created later */
face = (FT_Face)node->root.data;
FT_Done_Size( face->size );
if (face->size)
FT_Done_Size( face->size );
}
return error;
@ -310,6 +311,7 @@
FT_Lru_Reset( manager->sizes_lru );
FT_Lru_Reset( manager->faces_lru );
}
/* FIXME: flush the caches ?? */
}
@ -400,15 +402,23 @@
manager->num_bytes -= clazz->size_node( cache_node,
cache->cache_user );
cache->cache_data );
clazz->destroy_node( cache_node, cache->cache_user );
clazz->destroy_node( cache_node, cache->cache_data );
}
else
{
/* this should never happen! */
FT_ERROR(( "FTC_Manager_Compress: Cache Manager is corrupted!\n" ));
}
/* check, just in case of general corruption :-) */
if (manager->num_nodes <= 0)
{
FT_ERROR(( "FTC_Manager_Compress: invalid cache node count !!\n" ));
}
else
manager->num_nodes--;
}
node = prev;
}

292
src/cache/ftcsbits.c vendored
View File

@ -1,9 +1,29 @@
#include <cache/ftcsbits.h>
#include <freetype/cache/ftcsbits.h>
#include <freetype/fterrors.h>
#define FTC_SBITSET_ELEMENT_COUNT 16
typedef struct FTC_SBitSetRec_
{
FTC_ChunkSetRec root;
FTC_Image_Desc desc;
} FTC_SBitSetRec, *FTC_SBitSet;
typedef struct FTC_SBit_CacheRec_
{
FTC_Chunk_CacheRec root;
} FTC_SBit_CacheRec;
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** GLYPH IMAGE NODES *****/
/***** SBIT CACHE NODES *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
@ -20,10 +40,13 @@
for ( ; count > 0; sbit++, count-- )
FREE( sbit->buffer );
FREE( node->elements );
FREE( node );
}
static
FT_Error ftc_bitmap_copy( FT_Memory memory,
FT_Bitmap* source,
@ -48,12 +71,12 @@
LOCAL_FUNC_X
FT_Error ftc_sbit_chunk_node_new( FTC_ChunkSet cset,
FT_UInt index,
FTC_SBitChunk *anode )
FTC_ChunkNode *anode )
{
FT_Error error;
FT_Memory memory = cset->memory;
FTC_SBitSet sbitset = (FTC_SBitSet)cset;
FTC_SBitChunk node = 0;
FTC_ChunkNode node = 0;
FT_Face face;
FT_Size size;
@ -63,86 +86,96 @@
goto Exit;
/* init its inner fields */
error = FTC_ChunkNode_Init( FTC_CHUNKNODE(node), cset, index, 1 );
error = FTC_ChunkNode_Init( node, cset, index, 1 );
if (error)
goto Exit;
/* we will now load all glyph images */
/* we will now load all glyph images for this chunk */
error = FTC_Manager_Lookup_Size( cset->manager,
&sbitset->description.font,
&sbitset->desc.font,
&face, &size );
if ( !error )
{
FT_UInt glyph_index = index * cset->chunk_size;
FT_UInt glyph_index = index * cset->element_count;
FT_UInt load_flags = FT_LOAD_DEFAULT;
FT_UInt image_type = sbitset->description.image_type;
FT_UInt image_type = sbitset->desc.image_type;
FT_UInt count = node->num_elements;
FTC_SBit sbit = (FTC_SBit)node->elements;
if ( FTC_IMAGE_FORMAT( image_type ) == ftc_image_format_bitmap )
/* determine load flags, depending on the font description's */
/* image type.. */
{
if ( image_type & ftc_image_flag_monochrome )
load_flags |= FT_LOAD_MONOCHROME;
/* disable embedded bitmaps loading if necessary */
if ( image_type & ftc_image_flag_no_sbits )
load_flags |= FT_LOAD_NO_BITMAP;
}
else if ( FTC_IMAGE_FORMAT( image_type ) == ftc_image_format_outline )
{
/* disable embedded bitmaps loading */
load_flags |= FT_LOAD_NO_BITMAP;
if ( image_type & ftc_image_flag_unscaled )
if ( FTC_IMAGE_FORMAT( image_type ) == ftc_image_format_bitmap )
{
FT_ERROR(( "FTC_SBit_Cache: cannot load vector outlines in a"
if ( image_type & ftc_image_flag_monochrome )
load_flags |= FT_LOAD_MONOCHROME;
/* disable embedded bitmaps loading if necessary */
if ( image_type & ftc_image_flag_no_sbits )
load_flags |= FT_LOAD_NO_BITMAP;
}
else
{
FT_ERROR(( "FTC_SBit_Cache: cannot load scalable glyphs in a"
" sbit cache, please check your arguments !!\n" ));
error = FT_Err_Bad_Argument;
error = FT_Err_Invalid_Argument;
goto Exit;
}
}
/* always render glyphs to bitmaps */
load_flags |= FT_LOAD_RENDER;
/* always render glyphs to bitmaps */
load_flags |= FT_LOAD_RENDER;
if ( image_type & ftc_image_flag_unhinted )
load_flags |= FT_LOAD_NO_HINTING;
if ( image_type & ftc_image_flag_unhinted )
load_flags |= FT_LOAD_NO_HINTING;
if ( image_type & ftc_image_flag_autohinted )
load_flags |= FT_LOAD_FORCE_AUTOHINT;
if ( image_type & ftc_image_flag_autohinted )
load_flags |= FT_LOAD_FORCE_AUTOHINT;
}
/* load a chunk of small bitmaps in a row */
for ( ; count > 0; count--, glyph_index++ )
for ( ; count > 0; count--, glyph_index++, sbit++ )
{
/* by default, indicates a "missing" glyph */
sbit->buffer = 0;
error = FT_Load_Glyph( face, glyph_index, load_flags );
if (!error)
{
FT_Int temp;
FT_GlyphSlot slot = face->glyph;
FT_Bitmap* bitmap = &slot->bitmap;
FT_Int advance;
FT_Int xadvance, yadvance;
/* check that our values fit in 8-bit containers !! */
#define CHECK_SCHAR(d) ( temp = (FT_SChar)d, temp == d )
#define CHECK_BYTE(d) ( temp = (FT_Byte) d, temp == d )
/* check that our values fit in 8-bit containers !! */
/* if this is not the case, our bitmap is too large */
/* and we will leave it as "missing" with sbit.buffer = 0 */
#define CHECK_CHAR(d) ( temp = (FT_Char)d, temp == d )
#define CHECK_BYTE(d) ( temp = (FT_Byte)d, temp == d )
advance = (slot->metrics.horiAdvance+32) >> 6;
/* FIXME: add support for vertical layouts maybe.. */
/* horizontal advance in pixels */
xadvance = (slot->metrics.horiAdvance+32) >> 6;
yadvance = (slot->metrics.vertAdvance+32) >> 6;
if ( CHECK_BYTE ( bitmap->rows ) &&
CHECK_BYTE ( bitmap->width ) &&
CHECK_SCHAR( bitmap->pitch ) &&
CHECK_SCHAR( slot->bitmap_left ) &&
CHECK_SCHAR( slot->bitmap_top ) &&
CHECK_SCHAR( advance ) )
CHECK_CHAR ( bitmap->pitch ) &&
CHECK_CHAR ( slot->bitmap_left ) &&
CHECK_CHAR ( slot->bitmap_top ) &&
CHECK_CHAR ( xadvance ) &&
CHECK_CHAR ( yadvance ) )
{
sbit->width = (FT_Byte) bitmap->width;
sbit->height = (FT_Byte) bitmap->height;
sbit->pitch = (FT_SChar)bitmap->pitch;
sbit->left = (FT_SChar)slot->bitmap_left;
sbit->top = (FT_SChar)slot->bitmap_top;
sbit->advance = (FT_SChar)advance;
sbit->width = (FT_Byte) bitmap->width;
sbit->height = (FT_Byte) bitmap->rows;
sbit->pitch = (FT_Char) bitmap->pitch;
sbit->left = (FT_Char) slot->bitmap_left;
sbit->top = (FT_Char) slot->bitmap_top;
sbit->xadvance = (FT_Char) xadvance;
sbit->yadvance = (FT_Char) yadvance;
sbit->format = (FT_Byte) bitmap->pixel_mode;
/* grab the bitmap when possible */
if ( slot->flags & ft_glyph_own_bitmap )
@ -157,8 +190,6 @@
}
}
}
else
sbit->buffer = 0;
}
/* ignore the errors that might have occured there */
@ -179,46 +210,33 @@
/* this function is important because it is both part of */
/* a FTC_ChunkSet_Class and a FTC_CacheNode_Class */
/* a FTC_ChunkSet_Class and a FTC_CacheNode_Class */
/* */
LOCAL_FUNC_X
FT_ULong ftc_sbit_chunk_node_size( FTC_SBitChunk node )
FT_ULong ftc_sbit_chunk_node_size( FTC_ChunkNode node )
{
FT_ULong size = 0;
FT_Glyph glyph = node->ft_glyph;
FT_ULong size;
FTC_ChunkSet cset = node->cset;
FT_UInt count = node->num_elements;
FT_Int pitch;
FTC_SBit sbit = (FTC_SBit)node->elements;
size = sizeof (*node); /* the node itself */
size += cset->element_count * sizeof(FTC_SBitRec); /* the sbit recors */
switch ( glyph->format )
for ( ; count > 0; count--, sbit++ )
{
case ft_glyph_format_bitmap:
if (sbit->buffer)
{
FT_BitmapGlyph bitg;
bitg = (FT_BitmapGlyph)glyph;
size = bitg->bitmap.rows * labs( bitg->bitmap.pitch ) +
sizeof ( *bitg );
pitch = sbit->pitch;
if (pitch < 0)
pitch = -pitch;
/* add the size of a given glyph image */
size += pitch * sbit->height;
}
break;
case ft_glyph_format_outline:
{
FT_OutlineGlyph outg;
outg = (FT_OutlineGlyph)glyph;
size = outg->outline.n_points *
( sizeof( FT_Vector ) + sizeof ( FT_Byte ) ) +
outg->outline.n_contours * sizeof ( FT_Short ) +
sizeof ( *outg );
}
break;
default:
;
}
size += sizeof ( *node );
return size;
}
@ -226,26 +244,47 @@
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** GLYPH IMAGE QUEUES *****/
/***** SBIT CHUNK SETS *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
LOCAL_FUNC_X
FT_Error ftc_image_set_init( FTC_ImageSet iset,
FTC_Image_Desc* type )
FT_Error ftc_sbit_chunk_set_sizes( FTC_ChunkSet cset,
FTC_Image_Desc* desc )
{
iset->description = *type;
FT_Error error;
FT_Face face;
cset->element_count = FTC_SBITSET_ELEMENT_COUNT;
cset->element_size = sizeof(FTC_SBitRec);
/* lookup the FT_Face to obtain the number of glyphs */
error = FTC_Manager_Lookup_Face( cset->manager,
&desc->font, &face );
if (!error)
cset->element_max = face->num_glyphs;
return error;
}
LOCAL_FUNC_X
FT_Error ftc_sbit_chunk_set_init( FTC_SBitSet sset,
FTC_Image_Desc* type )
{
sset->desc = *type;
return 0;
}
LOCAL_FUNC_X
FT_Bool ftc_image_set_compare( FTC_ImageSet iset,
FTC_Image_Desc* type )
FT_Bool ftc_sbit_chunk_set_compare( FTC_SBitSet sset,
FTC_Image_Desc* type )
{
return !memcmp( &iset->description, type, sizeof ( *type ) );
return !memcmp( &sset->desc, type, sizeof ( *type ) );
}
@ -253,79 +292,83 @@
{
sizeof( FTC_ImageSetRec ),
(FTC_ChunkSet_InitFunc) ftc_image_set_init,
(FTC_ChunkSet_DoneFunc) 0,
(FTC_ChunkSet_CompareFunc) ftc_image_set_compare,
(FTC_ChunkSet_InitFunc) ftc_sbit_chunk_set_init,
(FTC_ChunkSet_DoneFunc) 0,
(FTC_ChunkSet_CompareFunc) ftc_sbit_chunk_set_compare,
(FTC_ChunkSet_SizesFunc) ftc_sbit_chunk_set_sizes,
(FTC_ChunkSet_NewNodeFunc) ftc_sbit_chunk_node_new,
(FTC_ChunkSet_SizeNodeFunc) ftc_sbit_chunk_node_size,
(FTC_ChunkSet_DestroyNodeFunc)ftc_sbit_chunk_node_destroy
(FTC_ChunkSet_NewNodeFunc) ftc_sbit_chunk_node_new,
(FTC_ChunkSet_SizeNodeFunc) ftc_sbit_chunk_node_size,
(FTC_ChunkSet_DestroyNodeFunc) ftc_sbit_chunk_node_destroy
};
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** GLYPH IMAGE CACHE *****/
/***** SBITS CACHE *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
FT_CPLUSPLUS( const FTC_Glyph_Cache_Class ) ftc_sbit_chunk_cache_class =
FT_CPLUSPLUS( const FTC_Chunk_Cache_Class ) ftc_sbit_cache_class =
{
{
sizeof( FTC_Image_CacheRec ),
(FTC_Cache_InitFunc) FTC_Glyph_Cache_Init,
(FTC_Cache_DoneFunc) FTC_Glyph_Cache_Done
sizeof( FTC_SBit_CacheRec ),
(FTC_Cache_InitFunc) FTC_Chunk_Cache_Init,
(FTC_Cache_DoneFunc) FTC_Chunk_Cache_Done
},
(FTC_ChunkSet_Class*) &ftc_sbit_chunk_set_class
};
FT_EXPORT_FUNC( FT_Error ) FTC_Image_Cache_New( FTC_Manager manager,
FTC_Image_Cache* acache )
FT_EXPORT_FUNC( FT_Error )
FTC_SBit_Cache_New( FTC_Manager manager,
FTC_SBit_Cache* acache )
{
return FTC_Manager_Register_Cache(
manager,
(FTC_Cache_Class*)&ftc_sbit_chunk_cache_class,
(FTC_Cache_Class*)&ftc_sbit_cache_class,
(FTC_Cache*)acache );
}
FT_EXPORT_DEF( FT_Error )
FTC_Image_Cache_Lookup( FTC_Image_Cache cache,
FTC_Image_Desc* desc,
FT_UInt gindex,
FT_Glyph* aglyph )
FTC_SBit_Cache_Lookup( FTC_SBit_Cache cache,
FTC_Image_Desc* desc,
FT_UInt gindex,
FTC_SBit *asbit )
{
FT_Error error;
FTC_ChunkSet gset;
FTC_GlyphNode node;
FTC_ChunkSet cset;
FTC_ChunkNode node;
FT_UInt cindex;
FTC_Manager manager;
FTC_ImageSet img_set;
FTC_SBitSet sset;
FTC_SBit sbit;
/* check for valid `desc' delayed to FT_Lru_Lookup() */
if ( !cache || !aglyph )
if ( !cache || !asbit )
return FT_Err_Invalid_Argument;
*aglyph = 0;
gset = cache->root.last_gset;
img_set = (FTC_ImageSet)gset;
if ( !gset || memcmp( &img_set->description, desc, sizeof ( *desc ) ) )
*asbit = 0;
cset = cache->root.last_cset;
sset = (FTC_SBitSet)cset;
if ( !cset || memcmp( &sset->desc, desc, sizeof ( *desc ) ) )
{
error = FT_Lru_Lookup( cache->root.gsets_lru,
error = FT_Lru_Lookup( cache->root.csets_lru,
(FT_LruKey)desc,
(FT_Pointer*)&gset );
cache->root.last_gset = gset;
(FT_Pointer*)&cset );
cache->root.last_cset = cset;
if ( error )
goto Exit;
}
error = FTC_ChunkSet_Lookup_Node( gset, gindex, &node );
error = FTC_ChunkSet_Lookup_Node( cset, gindex, &node, &cindex );
if ( error )
goto Exit;
@ -333,12 +376,19 @@
manager = cache->root.root.manager;
if ( manager->num_bytes > manager->max_bytes )
{
FTC_GlyphNode_Ref ( node );
FTC_ChunkNode_Ref ( node );
FTC_Manager_Compress( manager );
FTC_GlyphNode_Unref ( node );
FTC_ChunkNode_Unref ( node );
}
*aglyph = ((FTC_SBitChunk)node)->ft_glyph;
sbit = ((FTC_SBit)((FTC_ChunkNode)node)->elements) + cindex;
if (sbit->buffer == 0)
{
/* the glyph was missing, we return a NULL pointer !! */
sbit = 0;
}
*asbit = sbit;
Exit:
return error;