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|
/***************************************************************************/
/* */
/* ftcbasic.c */
/* */
/* The FreeType basic cache interface (body). */
/* */
/* Copyright 2003, 2004, 2005 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. */
/* */
/***************************************************************************/
#include <ft2build.h>
#include FT_CACHE_H
#include FT_CACHE_INTERNAL_GLYPH_H
#include FT_CACHE_INTERNAL_IMAGE_H
#include FT_CACHE_INTERNAL_SBITS_H
#include FT_INTERNAL_MEMORY_H
#include "ftcerror.h"
/*
* Basic Families
*
*/
typedef struct FTC_BasicFamilyRec_
{
FTC_FamilyRec family;
FTC_ScalerRec scaler;
FT_UInt load_flags;
} FTC_BasicFamilyRec, *FTC_BasicFamily;
#define FTC_BASIC_FAMILY_HASH(f) \
( FTC_SCALER_HASH( &(f)->scaler ) + 31*(f)->load_flags )
FT_CALLBACK_DEF( FT_Bool )
ftc_basic_family_equal( FTC_BasicFamily family,
FTC_BasicFamily query )
{
return ( FTC_SCALER_COMPARE( &(family)->scaler, &(query)->scaler ) &&
family->load_flags == query->load_flags );
}
FT_CALLBACK_DEF( FT_Bool )
ftc_basic_family_equal_faceid( FTC_BasicFamily family,
FTC_FaceID face_id )
{
return FT_BOOL( family->scaler.face_id == face_id );
}
FT_CALLBACK_DEF( FT_UInt )
ftc_basic_family_get_count( FTC_BasicFamily family,
FTC_Manager manager )
{
FT_Error error;
FT_Face face;
FT_UInt result = 0;
error = FTC_Manager_LookupFace( manager, family->scaler.face_id, &face );
if ( !error )
result = face->num_glyphs;
return result;
}
FT_CALLBACK_DEF( FT_Error )
ftc_basic_family_load_bitmap( FTC_BasicFamily family,
FT_UInt gindex,
FTC_Manager manager,
FT_Face *aface )
{
FT_Error error;
FT_Size size;
error = FTC_Manager_LookupSize( manager, &family->scaler, &size );
if ( !error )
{
FT_Face face = size->face;
error = FT_Load_Glyph( face, gindex,
family->load_flags | FT_LOAD_RENDER );
if ( !error )
*aface = face;
}
return error;
}
FT_CALLBACK_DEF( FT_Error )
ftc_basic_family_load_glyph( FTC_BasicFamily family,
FT_UInt gindex,
FTC_Manager manager,
FT_Glyph *aglyph )
{
FT_Error error;
FTC_Scaler scaler = &family->scaler;
FT_Face face;
FT_Size size;
/* we will now load the glyph image */
error = FTC_Manager_LookupSize( manager, scaler, &size );
if ( !error )
{
face = size->face;
error = FT_Load_Glyph( face, gindex, family->load_flags );
if ( !error )
{
if ( face->glyph->format == FT_GLYPH_FORMAT_BITMAP ||
face->glyph->format == FT_GLYPH_FORMAT_OUTLINE )
{
/* ok, copy it */
FT_Glyph glyph;
error = FT_Get_Glyph( face->glyph, &glyph );
if ( !error )
{
*aglyph = glyph;
goto Exit;
}
}
else
error = FTC_Err_Invalid_Argument;
}
}
Exit:
return error;
}
/*
*
* basic image cache
*
*/
FT_CALLBACK_TABLE_DEF
const FTC_ICacheClassRec ftc_basic_image_cache_class =
FTC_DEFINE_ICACHE_CLASS(
FTC_DEFINE_GCACHE_CLASS(
FTC_DEFINE_CACHE_CLASS(
FTC_INode_New,
FTC_INode_Weight,
FTC_GNode_Equal,
FTC_GNode_EqualFaceID,
FTC_INode_Free,
FTC_GCacheRec,
FTC_GCache_Init,
FTC_GCache_Done
),
FTC_DEFINE_FAMILY_CLASS(
FTC_BasicFamilyRec,
0 /* init */,
0 /* done */,
ftc_basic_family_equal,
ftc_basic_family_equal_faceid
)
),
ftc_basic_family_load_glyph
);
/* documentation is in ftcache.h */
FT_EXPORT_DEF( FT_Error )
FTC_ImageCache_New( FTC_Manager manager,
FTC_ImageCache *acache )
{
return FTC_Manager_RegisterCache( manager,
(FTC_CacheClass) &ftc_basic_image_cache_class,
(FTC_Cache*)acache );
}
/* documentation is in ftcache.h */
FT_EXPORT_DEF( FT_Error )
FTC_ImageCache_Lookup( FTC_ImageCache cache,
FTC_ImageType type,
FT_UInt gindex,
FT_Glyph *aglyph,
FTC_Node *anode )
{
FTC_BasicFamilyRec key_family;
FTC_GNodeRec key;
FTC_Node node = 0; /* make compiler happy */
FT_Error error;
FT_UInt32 hash;
/* some argument checks are delayed to FTC_Cache_Lookup */
if ( !aglyph )
{
error = FTC_Err_Invalid_Argument;
goto Exit;
}
*aglyph = NULL;
if ( anode )
*anode = NULL;
key_family.scaler.face_id = type->face_id;
key_family.scaler.width = type->width;
key_family.scaler.height = type->height;
key_family.scaler.pixel = 1;
key_family.scaler.x_res = 0; /* make compilers happy */
key_family.scaler.y_res = 0;
key_family.load_flags = type->flags;
hash = FTC_BASIC_FAMILY_HASH( &key_family );
FTC_GCACHE_GET_FAMILY( cache, ftc_basic_family_equal,
hash, &key_family, &key.family, error );
if ( !error )
{
hash += gindex;
key.gindex = gindex;
FTC_CACHE_LOOKUP_CMP( cache, FTC_GNODE_EQUAL, hash,
&key, node, error );
if ( !error )
{
*aglyph = FTC_INODE( node )->glyph;
if ( anode )
*anode = FTC_NODE_REF( node );
}
FTC_Family_Unref( FTC_FAMILY(key.family) );
}
Exit:
return error;
}
/*
*
* basic small bitmap cache
*
*/
FT_CALLBACK_TABLE_DEF
const FTC_SCacheClassRec ftc_basic_sbit_cache_class =
FTC_DEFINE_SCACHE_CLASS(
FTC_DEFINE_GCACHE_CLASS(
FTC_DEFINE_CACHE_CLASS(
FTC_SNode_New,
FTC_SNode_Weight,
FTC_SNode_Equal,
FTC_GNode_EqualFaceID,
FTC_SNode_Free,
FTC_GCacheRec,
FTC_GCache_Init,
FTC_GCache_Done
),
FTC_DEFINE_FAMILY_CLASS(
FTC_BasicFamilyRec,
0 /* init */,
0 /* done */,
ftc_basic_family_equal,
ftc_basic_family_equal_faceid
)
),
ftc_basic_family_get_count,
ftc_basic_family_load_bitmap
);
/* documentation is in ftcache.h */
FT_EXPORT_DEF( FT_Error )
FTC_SBitCache_New( FTC_Manager manager,
FTC_SBitCache *acache )
{
return FTC_Manager_RegisterCache( manager,
(FTC_CacheClass) &ftc_basic_sbit_cache_class,
(FTC_Cache*)acache );
}
/* documentation is in ftcache.h */
FT_EXPORT_DEF( FT_Error )
FTC_SBitCache_Lookup( FTC_SBitCache cache,
FTC_ImageType type,
FT_UInt gindex,
FTC_SBit *ansbit,
FTC_Node *anode )
{
FTC_BasicFamilyRec key_family;
FTC_GNodeRec key;
FT_Error error;
FTC_Node node = 0; /* make compiler happy */
FT_UInt32 hash;
if ( anode )
*anode = NULL;
/* other argument checks delayed to FTC_Cache_Lookup */
if ( !ansbit )
return FTC_Err_Invalid_Argument;
*ansbit = NULL;
key_family.scaler.face_id = type->face_id;
key_family.scaler.width = type->width;
key_family.scaler.height = type->height;
key_family.scaler.pixel = 1;
key_family.scaler.x_res = 0; /* make compilers happy */
key_family.scaler.y_res = 0;
key_family.load_flags = type->flags;
hash = FTC_BASIC_FAMILY_HASH( &key_family );
FTC_GCACHE_GET_FAMILY( cache, ftc_basic_family_equal,
hash, &key_family, &key.family, error );
if ( !error )
{
/* beware, the hash must be the same for all glyph ranges */
hash += gindex/FTC_SBIT_ITEMS_PER_NODE;
key.gindex = gindex;
FTC_CACHE_LOOKUP_CMP( cache, FTC_SNODE_EQUAL, hash,
&key, node, error );
if ( !error )
{
*ansbit = FTC_SNODE(node)->sbits + ( gindex - FTC_GNODE(node)->gindex );
if ( anode )
*anode = FTC_NODE_REF(node);
}
FTC_Family_Unref( FTC_FAMILY(key.family) );
}
return error;
}
/* END */
|
