ref: 75133bff1d216f7f45303a375a4f80e296d11902
dir: /src/cache/ftcimage.c/
/***************************************************************************/
/* */
/* ftcimage.c */
/* */
/* FreeType Image cache (body). */
/* */
/* Copyright 2000-2001 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_IMAGE_H
#include FT_CACHE_INTERNAL_GLYPH_H
#include FT_INTERNAL_MEMORY_H
#include "ftcerror.h"
#include <string.h> /* memcmp() */
#include <stdlib.h> /* labs() */
/* the FT_Glyph image node type */
typedef struct FTC_ImageNodeRec_
{
FTC_GlyphNodeRec gnode;
FT_Glyph glyph;
} FTC_ImageNodeRec, *FTC_ImageNode;
#define FTC_IMAGE_NODE(x) ((FTC_ImageNode)(x))
#define FTC_IMAGE_NODE_GINDEX(x) FTC_GLYPH_NODE_GINDEX(x)
/* the glyph image set type */
typedef struct FTC_ImageSetRec_
{
FTC_GlyphSetRec gset;
FTC_Image_Desc description;
} FTC_ImageSetRec, *FTC_ImageSet;
#define FTC_IMAGE_SET(x) ((FTC_ImageSet)(x))
#define FTC_IMAGE_SET_MEMORY(x) FTC_GLYPH_SET_MEMORY(&(x)->gset)
typedef struct FTC_ImageQueryRec_
{
FTC_GlyphQueryRec glyph;
FTC_Image_Desc desc;
} FTC_ImageQueryRec, *FTC_ImageQuery;
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** GLYPH IMAGE NODES *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
/* finalize a given glyph image node */
FT_CALLBACK_DEF( void )
ftc_image_node_done( FTC_ImageNode inode )
{
if (inode->glyph)
{
FT_Done_Glyph( inode->glyph );
inode->glyph = NULL;
}
}
/* initialize a new glyph image node */
FT_CALLBACK_DEF( FT_Error )
ftc_image_node_init( FTC_ImageNode inode,
FTC_GlyphQuery query )
{
FTC_ImageSet iset = FTC_IMAGE_SET( query->gset );
FT_Memory memory = FTC_IMAGE_SET_MEMORY( iset );
FT_Error error;
FT_Face face;
FT_Size size;
/* initialize its inner fields */
ftc_glyph_node_init( FTC_GLYPH_NODE(inode), query->gindex, query->gset );
/* we will now load the glyph image */
error = FTC_Manager_Lookup_Size( iset->gset.gcache->cache.manager,
&iset->description.font,
&face, &size );
if ( !error )
{
FT_UInt gindex = FTC_GLYPH_NODE_GINDEX(inode);
FT_UInt load_flags = FT_LOAD_DEFAULT;
FT_UInt image_type = iset->description.image_type;
if ( FTC_IMAGE_FORMAT( image_type ) == ftc_image_format_bitmap )
{
load_flags |= FT_LOAD_RENDER;
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 )
load_flags |= FT_LOAD_NO_SCALE;
}
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;
error = FT_Load_Glyph( face, gindex, 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 )
{
inode->glyph = glyph;
goto Exit;
}
}
else
error = FTC_Err_Invalid_Argument;
}
}
/* in case of error */
ftc_glyph_node_done( FTC_GLYPH_NODE(inode) );
Exit:
return error;
}
FT_CALLBACK_DEF( FT_ULong )
ftc_image_node_weight( FTC_ImageNode inode )
{
FT_ULong size = 0;
FT_Glyph glyph = inode->glyph;
switch ( glyph->format )
{
case ft_glyph_format_bitmap:
{
FT_BitmapGlyph bitg;
bitg = (FT_BitmapGlyph)glyph;
size = bitg->bitmap.rows * labs( bitg->bitmap.pitch ) +
sizeof ( *bitg );
}
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 ( *inode );
return size;
}
/* this function assumes that the desired node's glyph set has been */
/* set by a previous call to ftc_image_set_compare.. */
/* */
FT_CALLBACK_DEF( FT_Bool )
ftc_image_node_compare( FTC_ImageNode inode,
FTC_ImageQuery iquery )
{
FTC_ImageSet iset = FTC_IMAGE_SET(inode->gnode.gset);
/* only if same glyph index and image set description */
return FT_BOOL( iquery->glyph.gindex == FTC_IMAGE_NODE_GINDEX(inode) &&
iquery->glyph.gset == inode->gnode.gset );
}
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** GLYPH IMAGE SETS *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
FT_CALLBACK_DEF( FT_Error )
ftc_image_set_init( FTC_ImageSet iset,
FTC_ImageQuery query,
FT_LruList lru )
{
ftc_glyph_set_init( &iset->gset, lru );
iset->description = query->desc;
/* now compute hash from description - this is _very_ important */
iset->gset.hash = FTC_IMAGE_DESC_HASH(&query->desc);
query->glyph.gset = FTC_GLYPH_SET(iset);
return 0;
}
FT_CALLBACK_DEF( FT_Bool )
ftc_image_set_compare( FTC_ImageSet iset,
FTC_ImageQuery iquery )
{
FT_Bool result;
/* we must set iquery.glyph.gset for faster glyph node comparisons */
result = FT_BOOL( FTC_IMAGE_DESC_COMPARE( &iset->description, &iquery->desc ) );
if ( result )
iquery->glyph.gset = &iset->gset;
return result;
}
FT_CALLBACK_TABLE_DEF
const FT_LruList_ClassRec ftc_image_set_class =
{
sizeof( FT_LruListRec ),
(FT_LruList_InitFunc) NULL,
(FT_LruList_DoneFunc) NULL,
sizeof( FTC_ImageSetRec ),
(FT_LruNode_InitFunc) ftc_image_set_init,
(FT_LruNode_DoneFunc) ftc_glyph_set_init,
(FT_LruNode_FlushFunc) NULL,
(FT_LruNode_CompareFunc) ftc_image_set_compare
};
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** GLYPH IMAGE CACHE *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
FT_CALLBACK_DEF( FT_Error )
ftc_image_cache_init( FTC_Image_Cache cache )
{
return ftc_glyph_cache_init( (FTC_GlyphCache) cache, &ftc_image_set_class );
}
FT_CALLBACK_TABLE_DEF
const FTC_Cache_ClassRec ftc_image_cache_class =
{
sizeof( FTC_GlyphCacheRec ),
(FTC_Cache_InitFunc) ftc_image_cache_init,
(FTC_Cache_DoneFunc) ftc_glyph_cache_done,
sizeof( FTC_ImageNodeRec ),
(FTC_Node_InitFunc) ftc_image_node_init,
(FTC_Node_WeightFunc) ftc_image_node_weight,
(FTC_Node_CompareFunc) ftc_image_node_compare,
(FTC_Node_DoneFunc) ftc_image_node_done
};
/* documentation is in ftcimage.h */
FT_EXPORT_DEF( FT_Error )
FTC_Image_Cache_New( FTC_Manager manager,
FTC_Image_Cache *acache )
{
return FTC_Manager_Register_Cache(
manager,
(FTC_Cache_Class) &ftc_image_cache_class,
FTC_CACHE_P(acache) );
}
/* documentation is in ftcimage.h */
FT_EXPORT_DEF( FT_Error )
FTC_Image_Cache_Acquire( FTC_Image_Cache cache,
FTC_Image_Desc* desc,
FT_UInt gindex,
FT_Glyph *aglyph,
FTC_Node *anode )
{
FTC_ImageQueryRec query;
FTC_ImageNode node;
FT_Error error;
/* some argument checks are delayed to ftc_glyph_cache_lookup */
if ( !cache || !desc || !aglyph )
return FTC_Err_Invalid_Argument;
*aglyph = NULL;
if ( anode )
*anode = NULL;
query.glyph.gindex = gindex;
query.glyph.gset = NULL;
query.desc = *desc;
error = ftc_glyph_cache_lookup( FTC_GLYPH_CACHE(cache),
&query.glyph,
(FTC_GlyphNode*) &node );
if (!error)
{
*aglyph = node->glyph;
if (anode)
{
*anode = (FTC_Node) node;
FTC_NODE(node)->ref_count++;
}
}
return error;
}
FT_EXPORT_DEF( void )
FTC_Image_Cache_Release( FTC_Image_Cache icache,
FTC_Node node )
{
ftc_node_unref( node, FTC_CACHE(icache) );
}
FT_EXPORT_DEF( FT_Error )
FTC_Image_Cache_Lookup( FTC_Image_Cache icache,
FTC_Image_Desc* desc,
FT_UInt gindex,
FT_Glyph *aglyph )
{
return FTC_Image_Cache_Acquire( icache, desc, gindex, aglyph, NULL );
}
/* END */