📄 ftcache.c
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/***************************************************************************/
/* */
/* ftcache.c */
/* */
/* The FreeType Caching sub-system (body only). */
/* */
/* Copyright 2000-2001, 2003 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. */
/* */
/***************************************************************************/
#define FT_MAKE_OPTION_SINGLE_OBJECT
#include "ft2build.h"
/***************************************************************************/
/* */
/* ftcmru.c */
/* */
/* FreeType MRU support (body). */
/* */
/* Copyright 2003, 2004, 2006 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 "ftcmru.h"
#include FT_INTERNAL_OBJECTS_H
#include FT_INTERNAL_DEBUG_H
#include "ftcerror.h"
FT_LOCAL_DEF( void )
FTC_MruNode_Prepend( FTC_MruNode *plist,
FTC_MruNode node )
{
FTC_MruNode first = *plist;
if ( first )
{
FTC_MruNode last = first->prev;
#ifdef FT_DEBUG_ERROR
{
FTC_MruNode cnode = first;
do
{
if ( cnode == node )
{
fprintf( stderr, "FTC_MruNode_Prepend: invalid action!\n" );
exit( 2 );
}
cnode = cnode->next;
} while ( cnode != first );
}
#endif
first->prev = node;
last->next = node;
node->next = first;
node->prev = last;
}
else
{
node->next = node;
node->prev = node;
}
*plist = node;
}
FT_LOCAL_DEF( void )
FTC_MruNode_Up( FTC_MruNode *plist,
FTC_MruNode node )
{
FTC_MruNode first = *plist;
FT_ASSERT( first != NULL );
if ( first != node )
{
FTC_MruNode prev, next, last;
#ifdef FT_DEBUG_ERROR
{
FTC_MruNode cnode = first;
do
{
if ( cnode == node )
goto Ok;
cnode = cnode->next;
} while ( cnode != first );
fprintf( stderr, "FTC_MruNode_Up: invalid action!\n" );
exit( 2 );
Ok:
}
#endif
prev = node->prev;
next = node->next;
prev->next = next;
next->prev = prev;
last = first->prev;
last->next = node;
first->prev = node;
node->next = first;
node->prev = last;
*plist = node;
}
}
FT_LOCAL_DEF( void )
FTC_MruNode_Remove( FTC_MruNode *plist,
FTC_MruNode node )
{
FTC_MruNode first = *plist;
FTC_MruNode prev, next;
FT_ASSERT( first != NULL );
#ifdef FT_DEBUG_ERROR
{
FTC_MruNode cnode = first;
do
{
if ( cnode == node )
goto Ok;
cnode = cnode->next;
} while ( cnode != first );
fprintf( stderr, "FTC_MruNode_Remove: invalid action!\n" );
exit( 2 );
Ok:
}
#endif
prev = node->prev;
next = node->next;
prev->next = next;
next->prev = prev;
if ( node == next )
{
FT_ASSERT( first == node );
FT_ASSERT( prev == node );
*plist = NULL;
}
else if ( node == first )
*plist = next;
}
FT_LOCAL_DEF( void )
FTC_MruList_Init( FTC_MruList list,
FTC_MruListClass clazz,
FT_UInt max_nodes,
FT_Pointer data,
FT_Memory memory )
{
list->num_nodes = 0;
list->max_nodes = max_nodes;
list->nodes = NULL;
list->clazz = *clazz;
list->data = data;
list->memory = memory;
}
FT_LOCAL_DEF( void )
FTC_MruList_Reset( FTC_MruList list )
{
while ( list->nodes )
FTC_MruList_Remove( list, list->nodes );
FT_ASSERT( list->num_nodes == 0 );
}
FT_LOCAL_DEF( void )
FTC_MruList_Done( FTC_MruList list )
{
FTC_MruList_Reset( list );
}
#ifndef FTC_INLINE
FT_LOCAL_DEF( FTC_MruNode )
FTC_MruList_Find( FTC_MruList list,
FT_Pointer key )
{
FTC_MruNode_CompareFunc compare = list->clazz.node_compare;
FTC_MruNode first, node;
first = list->nodes;
node = NULL;
if ( first )
{
node = first;
do
{
if ( compare( node, key ) )
{
if ( node != first )
FTC_MruNode_Up( &list->nodes, node );
return node;
}
node = node->next;
} while ( node != first);
}
return NULL;
}
#endif
FT_LOCAL_DEF( FT_Error )
FTC_MruList_New( FTC_MruList list,
FT_Pointer key,
FTC_MruNode *anode )
{
FT_Error error;
FTC_MruNode node;
FT_Memory memory = list->memory;
if ( list->num_nodes >= list->max_nodes && list->max_nodes > 0 )
{
node = list->nodes->prev;
FT_ASSERT( node );
if ( list->clazz.node_reset )
{
FTC_MruNode_Up( &list->nodes, node );
error = list->clazz.node_reset( node, key, list->data );
if ( !error )
goto Exit;
}
FTC_MruNode_Remove( &list->nodes, node );
list->num_nodes--;
if ( list->clazz.node_done )
list->clazz.node_done( node, list->data );
}
else if ( FT_ALLOC( node, list->clazz.node_size ) )
goto Exit;
error = list->clazz.node_init( node, key, list->data );
if ( error )
goto Fail;
FTC_MruNode_Prepend( &list->nodes, node );
list->num_nodes++;
Exit:
*anode = node;
return error;
Fail:
if ( list->clazz.node_done )
list->clazz.node_done( node, list->data );
FT_FREE( node );
goto Exit;
}
#ifndef FTC_INLINE
FT_LOCAL_DEF( FT_Error )
FTC_MruList_Lookup( FTC_MruList list,
FT_Pointer key,
FTC_MruNode *anode )
{
FTC_MruNode node;
node = FTC_MruList_Find( list, key );
if ( node == NULL )
return FTC_MruList_New( list, key, anode );
*anode = node;
return 0;
}
#endif /* FTC_INLINE */
FT_LOCAL_DEF( void )
FTC_MruList_Remove( FTC_MruList list,
FTC_MruNode node )
{
FTC_MruNode_Remove( &list->nodes, node );
list->num_nodes--;
{
FT_Memory memory = list->memory;
if ( list->clazz.node_done )
list->clazz.node_done( node, list->data );
FT_FREE( node );
}
}
FT_LOCAL_DEF( void )
FTC_MruList_RemoveSelection( FTC_MruList list,
FTC_MruNode_CompareFunc selection,
FT_Pointer key )
{
FTC_MruNode first, node, next;
first = list->nodes;
while ( first && ( selection == NULL || selection( first, key ) ) )
{
FTC_MruList_Remove( list, first );
first = list->nodes;
}
if ( first )
{
node = first->next;
while ( node != first )
{
next = node->next;
if ( selection( node, key ) )
FTC_MruList_Remove( list, node );
node = next;
}
}
}
/* END */
/***************************************************************************/
/* */
/* ftcmanag.c */
/* */
/* FreeType Cache Manager (body). */
/* */
/* Copyright 2000-2001, 2002, 2003, 2004, 2005, 2006 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 "ftcmanag.h"
#include FT_INTERNAL_OBJECTS_H
#include FT_INTERNAL_DEBUG_H
#include FT_SIZES_H
#include "ftccback.h"
#include "ftcerror.h"
#undef FT_COMPONENT
#define FT_COMPONENT trace_cache
#define FTC_LRU_GET_MANAGER( lru ) ( (FTC_Manager)(lru)->user_data )
static FT_Error
ftc_scaler_lookup_size( FTC_Manager manager,
FTC_Scaler scaler,
FT_Size *asize )
{
FT_Face face;
FT_Size size = NULL;
FT_Error error;
error = FTC_Manager_LookupFace( manager, scaler->face_id, &face );
if ( error )
goto Exit;
error = FT_New_Size( face, &size );
if ( error )
goto Exit;
FT_Activate_Size( size );
if ( scaler->pixel )
error = FT_Set_Pixel_Sizes( face, scaler->width, scaler->height );
else
error = FT_Set_Char_Size( face, scaler->width, scaler->height,
scaler->x_res, scaler->y_res );
if ( error )
{
FT_Done_Size( size );
size = NULL;
}
Exit:
*asize = size;
return error;
}
typedef struct FTC_SizeNodeRec_
{
FTC_MruNodeRec node;
FT_Size size;
FTC_ScalerRec scaler;
} FTC_SizeNodeRec, *FTC_SizeNode;
FT_CALLBACK_DEF( void )
ftc_size_node_done( FTC_MruNode ftcnode,
FT_Pointer data )
{
FTC_SizeNode node = (FTC_SizeNode)ftcnode;
FT_Size size = node->size;
FT_UNUSED( data );
if ( size )
FT_Done_Size( size );
}
FT_CALLBACK_DEF( FT_Bool )
ftc_size_node_compare( FTC_MruNode ftcnode,
FT_Pointer ftcscaler )
{
FTC_SizeNode node = (FTC_SizeNode)ftcnode;
FTC_Scaler scaler = (FTC_Scaler)ftcscaler;
FTC_Scaler scaler0 = &node->scaler;
if ( FTC_SCALER_COMPARE( scaler0, scaler ) )
{
FT_Activate_Size( node->size );
return 1;
}
return 0;
}
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