ref: 2373074a2ce9344e9fd058d76472e9aa85bbd4e8
dir: /src/cache/ftcbasic.c/
/****************************************************************************
*
* ftcbasic.c
*
* The FreeType basic cache interface (body).
*
* Copyright (C) 2003-2020 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 <freetype/internal/ftobjs.h>
#include <freetype/internal/ftdebug.h>
#include <freetype/ftcache.h>
#include "ftcglyph.h"
#include "ftcimage.h"
#include "ftcsbits.h"
#include "ftccback.h"
#include "ftcerror.h"
#define FT_COMPONENT cache
/*
* Basic Families
*
*/
typedef struct FTC_BasicAttrRec_
{
FTC_ScalerRec scaler;
FT_UInt load_flags;
} FTC_BasicAttrRec, *FTC_BasicAttrs;
#define FTC_BASIC_ATTR_COMPARE( a, b ) \
FT_BOOL( FTC_SCALER_COMPARE( &(a)->scaler, &(b)->scaler ) && \
(a)->load_flags == (b)->load_flags )
#define FTC_BASIC_ATTR_HASH( a ) \
( FTC_SCALER_HASH( &(a)->scaler ) + 31 * (a)->load_flags )
typedef struct FTC_BasicQueryRec_
{
FTC_GQueryRec gquery;
FTC_BasicAttrRec attrs;
} FTC_BasicQueryRec, *FTC_BasicQuery;
typedef struct FTC_BasicFamilyRec_
{
FTC_FamilyRec family;
FTC_BasicAttrRec attrs;
} FTC_BasicFamilyRec, *FTC_BasicFamily;
FT_CALLBACK_DEF( FT_Bool )
ftc_basic_family_compare( FTC_MruNode ftcfamily,
FT_Pointer ftcquery )
{
FTC_BasicFamily family = (FTC_BasicFamily)ftcfamily;
FTC_BasicQuery query = (FTC_BasicQuery)ftcquery;
return FTC_BASIC_ATTR_COMPARE( &family->attrs, &query->attrs );
}
FT_CALLBACK_DEF( FT_Error )
ftc_basic_family_init( FTC_MruNode ftcfamily,
FT_Pointer ftcquery,
FT_Pointer ftccache )
{
FTC_BasicFamily family = (FTC_BasicFamily)ftcfamily;
FTC_BasicQuery query = (FTC_BasicQuery)ftcquery;
FTC_Cache cache = (FTC_Cache)ftccache;
FTC_Family_Init( FTC_FAMILY( family ), cache );
family->attrs = query->attrs;
return 0;
}
FT_CALLBACK_DEF( FT_UInt )
ftc_basic_family_get_count( FTC_Family ftcfamily,
FTC_Manager manager )
{
FTC_BasicFamily family = (FTC_BasicFamily)ftcfamily;
FT_Error error;
FT_Face face;
FT_UInt result = 0;
error = FTC_Manager_LookupFace( manager, family->attrs.scaler.face_id,
&face );
if ( error || !face )
return result;
if ( (FT_ULong)face->num_glyphs > FT_UINT_MAX || 0 > face->num_glyphs )
FT_TRACE1(( "ftc_basic_family_get_count:"
" the number of glyphs in this face is %ld,\n"
" "
" which is too much and thus truncated\n",
face->num_glyphs ));
if ( !error )
result = (FT_UInt)face->num_glyphs;
return result;
}
FT_CALLBACK_DEF( FT_Error )
ftc_basic_family_load_bitmap( FTC_Family ftcfamily,
FT_UInt gindex,
FTC_Manager manager,
FT_Face *aface )
{
FTC_BasicFamily family = (FTC_BasicFamily)ftcfamily;
FT_Error error;
FT_Size size;
error = FTC_Manager_LookupSize( manager, &family->attrs.scaler, &size );
if ( !error )
{
FT_Face face = size->face;
error = FT_Load_Glyph(
face,
gindex,
(FT_Int)family->attrs.load_flags | FT_LOAD_RENDER );
if ( !error )
*aface = face;
}
return error;
}
FT_CALLBACK_DEF( FT_Error )
ftc_basic_family_load_glyph( FTC_Family ftcfamily,
FT_UInt gindex,
FTC_Cache cache,
FT_Glyph *aglyph )
{
FTC_BasicFamily family = (FTC_BasicFamily)ftcfamily;
FT_Error error;
FTC_Scaler scaler = &family->attrs.scaler;
FT_Face face;
FT_Size size;
/* we will now load the glyph image */
error = FTC_Manager_LookupSize( cache->manager,
scaler,
&size );
if ( !error )
{
face = size->face;
error = FT_Load_Glyph( face,
gindex,
(FT_Int)family->attrs.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 = FT_THROW( Invalid_Argument );
}
}
Exit:
return error;
}
FT_CALLBACK_DEF( FT_Bool )
ftc_basic_gnode_compare_faceid( FTC_Node ftcgnode,
FT_Pointer ftcface_id,
FTC_Cache cache,
FT_Bool* list_changed )
{
FTC_GNode gnode = (FTC_GNode)ftcgnode;
FTC_FaceID face_id = (FTC_FaceID)ftcface_id;
FTC_BasicFamily family = (FTC_BasicFamily)gnode->family;
FT_Bool result;
if ( list_changed )
*list_changed = FALSE;
result = FT_BOOL( family->attrs.scaler.face_id == face_id );
if ( result )
{
/* we must call this function to avoid this node from appearing
* in later lookups with the same face_id!
*/
FTC_GNode_UnselectFamily( gnode, cache );
}
return result;
}
/*
*
* basic image cache
*
*/
static
const FTC_IFamilyClassRec ftc_basic_image_family_class =
{
{
sizeof ( FTC_BasicFamilyRec ),
ftc_basic_family_compare, /* FTC_MruNode_CompareFunc node_compare */
ftc_basic_family_init, /* FTC_MruNode_InitFunc node_init */
NULL, /* FTC_MruNode_ResetFunc node_reset */
NULL /* FTC_MruNode_DoneFunc node_done */
},
ftc_basic_family_load_glyph /* FTC_IFamily_LoadGlyphFunc family_load_glyph */
};
static
const FTC_GCacheClassRec ftc_basic_image_cache_class =
{
{
ftc_inode_new, /* FTC_Node_NewFunc node_new */
ftc_inode_weight, /* FTC_Node_WeightFunc node_weight */
ftc_gnode_compare, /* FTC_Node_CompareFunc node_compare */
ftc_basic_gnode_compare_faceid, /* FTC_Node_CompareFunc node_remove_faceid */
ftc_inode_free, /* FTC_Node_FreeFunc node_free */
sizeof ( FTC_GCacheRec ),
ftc_gcache_init, /* FTC_Cache_InitFunc cache_init */
ftc_gcache_done /* FTC_Cache_DoneFunc cache_done */
},
(FTC_MruListClass)&ftc_basic_image_family_class
};
/* documentation is in ftcache.h */
FT_EXPORT_DEF( FT_Error )
FTC_ImageCache_New( FTC_Manager manager,
FTC_ImageCache *acache )
{
return FTC_GCache_New( manager, &ftc_basic_image_cache_class,
(FTC_GCache*)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_BasicQueryRec query;
FTC_Node node = 0; /* make compiler happy */
FT_Error error;
FT_Offset hash;
/* some argument checks are delayed to `FTC_Cache_Lookup' */
if ( !aglyph )
{
error = FT_THROW( Invalid_Argument );
goto Exit;
}
*aglyph = NULL;
if ( anode )
*anode = NULL;
/*
* Internal `FTC_BasicAttr->load_flags' is of type `FT_UInt',
* but public `FT_ImageType->flags' is of type `FT_Int32'.
*
* On 16bit systems, higher bits of type->flags cannot be handled.
*/
#if 0xFFFFFFFFUL > FT_UINT_MAX
if ( (type->flags & (FT_ULong)FT_UINT_MAX) )
FT_TRACE1(( "FTC_ImageCache_Lookup:"
" higher bits in load_flags 0x%x are dropped\n",
(FT_ULong)type->flags & ~((FT_ULong)FT_UINT_MAX) ));
#endif
query.attrs.scaler.face_id = type->face_id;
query.attrs.scaler.width = type->width;
query.attrs.scaler.height = type->height;
query.attrs.load_flags = (FT_UInt)type->flags;
query.attrs.scaler.pixel = 1;
query.attrs.scaler.x_res = 0; /* make compilers happy */
query.attrs.scaler.y_res = 0;
hash = FTC_BASIC_ATTR_HASH( &query.attrs ) + gindex;
#if 1 /* inlining is about 50% faster! */
FTC_GCACHE_LOOKUP_CMP( cache,
ftc_basic_family_compare,
FTC_GNode_Compare,
hash, gindex,
&query,
node,
error );
#else
error = FTC_GCache_Lookup( FTC_GCACHE( cache ),
hash, gindex,
FTC_GQUERY( &query ),
&node );
#endif
if ( !error )
{
*aglyph = FTC_INODE( node )->glyph;
if ( anode )
{
*anode = node;
node->ref_count++;
}
}
Exit:
return error;
}
/* documentation is in ftcache.h */
FT_EXPORT_DEF( FT_Error )
FTC_ImageCache_LookupScaler( FTC_ImageCache cache,
FTC_Scaler scaler,
FT_ULong load_flags,
FT_UInt gindex,
FT_Glyph *aglyph,
FTC_Node *anode )
{
FTC_BasicQueryRec query;
FTC_Node node = 0; /* make compiler happy */
FT_Error error;
FT_Offset hash;
/* some argument checks are delayed to `FTC_Cache_Lookup' */
if ( !aglyph || !scaler )
{
error = FT_THROW( Invalid_Argument );
goto Exit;
}
*aglyph = NULL;
if ( anode )
*anode = NULL;
/*
* Internal `FTC_BasicAttr->load_flags' is of type `FT_UInt',
* but public `FT_Face->face_flags' is of type `FT_Long'.
*
* On long > int systems, higher bits of load_flags cannot be handled.
*/
#if FT_ULONG_MAX > FT_UINT_MAX
if ( load_flags > FT_UINT_MAX )
FT_TRACE1(( "FTC_ImageCache_LookupScaler:"
" higher bits in load_flags 0x%lx are dropped\n",
load_flags & ~((FT_ULong)FT_UINT_MAX) ));
#endif
query.attrs.scaler = scaler[0];
query.attrs.load_flags = (FT_UInt)load_flags;
hash = FTC_BASIC_ATTR_HASH( &query.attrs ) + gindex;
FTC_GCACHE_LOOKUP_CMP( cache,
ftc_basic_family_compare,
FTC_GNode_Compare,
hash, gindex,
&query,
node,
error );
if ( !error )
{
*aglyph = FTC_INODE( node )->glyph;
if ( anode )
{
*anode = node;
node->ref_count++;
}
}
Exit:
return error;
}
/*
*
* basic small bitmap cache
*
*/
static
const FTC_SFamilyClassRec ftc_basic_sbit_family_class =
{
{
sizeof ( FTC_BasicFamilyRec ),
ftc_basic_family_compare, /* FTC_MruNode_CompareFunc node_compare */
ftc_basic_family_init, /* FTC_MruNode_InitFunc node_init */
NULL, /* FTC_MruNode_ResetFunc node_reset */
NULL /* FTC_MruNode_DoneFunc node_done */
},
ftc_basic_family_get_count,
ftc_basic_family_load_bitmap
};
static
const FTC_GCacheClassRec ftc_basic_sbit_cache_class =
{
{
ftc_snode_new, /* FTC_Node_NewFunc node_new */
ftc_snode_weight, /* FTC_Node_WeightFunc node_weight */
ftc_snode_compare, /* FTC_Node_CompareFunc node_compare */
ftc_basic_gnode_compare_faceid, /* FTC_Node_CompareFunc node_remove_faceid */
ftc_snode_free, /* FTC_Node_FreeFunc node_free */
sizeof ( FTC_GCacheRec ),
ftc_gcache_init, /* FTC_Cache_InitFunc cache_init */
ftc_gcache_done /* FTC_Cache_DoneFunc cache_done */
},
(FTC_MruListClass)&ftc_basic_sbit_family_class
};
/* documentation is in ftcache.h */
FT_EXPORT_DEF( FT_Error )
FTC_SBitCache_New( FTC_Manager manager,
FTC_SBitCache *acache )
{
return FTC_GCache_New( manager, &ftc_basic_sbit_cache_class,
(FTC_GCache*)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 )
{
FT_Error error;
FTC_BasicQueryRec query;
FTC_Node node = 0; /* make compiler happy */
FT_Offset hash;
if ( anode )
*anode = NULL;
/* other argument checks delayed to `FTC_Cache_Lookup' */
if ( !ansbit )
return FT_THROW( Invalid_Argument );
*ansbit = NULL;
/*
* Internal `FTC_BasicAttr->load_flags' is of type `FT_UInt',
* but public `FT_ImageType->flags' is of type `FT_Int32'.
*
* On 16bit systems, higher bits of type->flags cannot be handled.
*/
#if 0xFFFFFFFFUL > FT_UINT_MAX
if ( (type->flags & (FT_ULong)FT_UINT_MAX) )
FT_TRACE1(( "FTC_ImageCache_Lookup:"
" higher bits in load_flags 0x%x are dropped\n",
(FT_ULong)type->flags & ~((FT_ULong)FT_UINT_MAX) ));
#endif
query.attrs.scaler.face_id = type->face_id;
query.attrs.scaler.width = type->width;
query.attrs.scaler.height = type->height;
query.attrs.load_flags = (FT_UInt)type->flags;
query.attrs.scaler.pixel = 1;
query.attrs.scaler.x_res = 0; /* make compilers happy */
query.attrs.scaler.y_res = 0;
/* beware, the hash must be the same for all glyph ranges! */
hash = FTC_BASIC_ATTR_HASH( &query.attrs ) +
gindex / FTC_SBIT_ITEMS_PER_NODE;
#if 1 /* inlining is about 50% faster! */
FTC_GCACHE_LOOKUP_CMP( cache,
ftc_basic_family_compare,
FTC_SNode_Compare,
hash, gindex,
&query,
node,
error );
#else
error = FTC_GCache_Lookup( FTC_GCACHE( cache ),
hash,
gindex,
FTC_GQUERY( &query ),
&node );
#endif
if ( error )
goto Exit;
*ansbit = FTC_SNODE( node )->sbits +
( gindex - FTC_GNODE( node )->gindex );
if ( anode )
{
*anode = node;
node->ref_count++;
}
Exit:
return error;
}
/* documentation is in ftcache.h */
FT_EXPORT_DEF( FT_Error )
FTC_SBitCache_LookupScaler( FTC_SBitCache cache,
FTC_Scaler scaler,
FT_ULong load_flags,
FT_UInt gindex,
FTC_SBit *ansbit,
FTC_Node *anode )
{
FT_Error error;
FTC_BasicQueryRec query;
FTC_Node node = 0; /* make compiler happy */
FT_Offset hash;
if ( anode )
*anode = NULL;
/* other argument checks delayed to `FTC_Cache_Lookup' */
if ( !ansbit || !scaler )
return FT_THROW( Invalid_Argument );
*ansbit = NULL;
/*
* Internal `FTC_BasicAttr->load_flags' is of type `FT_UInt',
* but public `FT_Face->face_flags' is of type `FT_Long'.
*
* On long > int systems, higher bits of load_flags cannot be handled.
*/
#if FT_ULONG_MAX > FT_UINT_MAX
if ( load_flags > FT_UINT_MAX )
FT_TRACE1(( "FTC_ImageCache_LookupScaler:"
" higher bits in load_flags 0x%lx are dropped\n",
load_flags & ~((FT_ULong)FT_UINT_MAX) ));
#endif
query.attrs.scaler = scaler[0];
query.attrs.load_flags = (FT_UInt)load_flags;
/* beware, the hash must be the same for all glyph ranges! */
hash = FTC_BASIC_ATTR_HASH( &query.attrs ) +
gindex / FTC_SBIT_ITEMS_PER_NODE;
FTC_GCACHE_LOOKUP_CMP( cache,
ftc_basic_family_compare,
FTC_SNode_Compare,
hash, gindex,
&query,
node,
error );
if ( error )
goto Exit;
*ansbit = FTC_SNODE( node )->sbits +
( gindex - FTC_GNODE( node )->gindex );
if ( anode )
{
*anode = node;
node->ref_count++;
}
Exit:
return error;
}
/* END */