diff options
Diffstat (limited to 'libfreetype/ftccmap.c')
| -rw-r--r-- | libfreetype/ftccmap.c | 411 |
1 files changed, 0 insertions, 411 deletions
diff --git a/libfreetype/ftccmap.c b/libfreetype/ftccmap.c deleted file mode 100644 index 8c982c3d..00000000 --- a/libfreetype/ftccmap.c +++ /dev/null @@ -1,411 +0,0 @@ -/***************************************************************************/ -/* */ -/* ftccmap.c */ -/* */ -/* FreeType CharMap cache (body) */ -/* */ -/* Copyright 2000-2001, 2002 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_FREETYPE_H -#include FT_CACHE_H -#include FT_CACHE_CHARMAP_H -#include FT_CACHE_MANAGER_H -#include FT_INTERNAL_MEMORY_H -#include FT_INTERNAL_DEBUG_H - -#include "ftcerror.h" - - /*************************************************************************/ - /* */ - /* Each FTC_CMapNode contains a simple array to map a range of character */ - /* codes to equivalent glyph indices. */ - /* */ - /* For now, the implementation is very basic: Each node maps a range of */ - /* 128 consecutive character codes to their corresponding glyph indices. */ - /* */ - /* We could do more complex things, but I don't think it is really very */ - /* useful. */ - /* */ - /*************************************************************************/ - - - /* number of glyph indices / character code per node */ -#define FTC_CMAP_INDICES_MAX 128 - - - typedef struct FTC_CMapNodeRec_ - { - FTC_NodeRec node; - FT_UInt32 first; /* first character in node */ - FT_UInt16 indices[FTC_CMAP_INDICES_MAX]; /* array of glyph indices */ - - } FTC_CMapNodeRec, *FTC_CMapNode; - - -#define FTC_CMAP_NODE( x ) ( (FTC_CMapNode)( x ) ) - - - /* compute node hash value from cmap family and "requested" glyph index */ -#define FTC_CMAP_HASH( cfam, cquery ) \ - ( (cfam)->hash + ( (cquery)->char_code / FTC_CMAP_INDICES_MAX ) ) - - /* if (indices[n] == FTC_CMAP_UNKNOWN), we assume that the corresponding */ - /* glyph indices haven't been queried through FT_Get_Glyph_Index() yet */ -#define FTC_CMAP_UNKNOWN ( (FT_UInt16)-1 ) - - - /* the charmap query */ - typedef struct FTC_CMapQueryRec_ - { - FTC_QueryRec query; - FTC_CMapDesc desc; - FT_UInt32 char_code; - - } FTC_CMapQueryRec, *FTC_CMapQuery; - - -#define FTC_CMAP_QUERY( x ) ( (FTC_CMapQuery)( x ) ) - - - /* the charmap family */ - typedef struct FTC_CMapFamilyRec_ - { - FTC_FamilyRec family; - FT_UInt32 hash; - FTC_CMapDescRec desc; - FT_UInt index; - - } FTC_CMapFamilyRec, *FTC_CMapFamily; - - -#define FTC_CMAP_FAMILY( x ) ( (FTC_CMapFamily)( x ) ) -#define FTC_CMAP_FAMILY_MEMORY( x ) FTC_FAMILY( x )->memory - - - /*************************************************************************/ - /*************************************************************************/ - /***** *****/ - /***** CHARMAP NODES *****/ - /***** *****/ - /*************************************************************************/ - /*************************************************************************/ - - - /* no need for specific finalizer; we use "ftc_node_done" directly */ - - /* initialize a new cmap node */ - FT_CALLBACK_DEF( FT_Error ) - ftc_cmap_node_init( FTC_CMapNode cnode, - FTC_CMapQuery cquery, - FTC_Cache cache ) - { - FT_UInt32 first; - FT_UInt n; - FT_UNUSED( cache ); - - - first = ( cquery->char_code / FTC_CMAP_INDICES_MAX ) * - FTC_CMAP_INDICES_MAX; - - cnode->first = first; - for ( n = 0; n < FTC_CMAP_INDICES_MAX; n++ ) - cnode->indices[n] = FTC_CMAP_UNKNOWN; - - return 0; - } - - - /* compute the weight of a given cmap node */ - FT_CALLBACK_DEF( FT_ULong ) - ftc_cmap_node_weight( FTC_CMapNode cnode ) - { - FT_UNUSED( cnode ); - - return sizeof ( *cnode ); - } - - - /* compare a cmap node to a given query */ - FT_CALLBACK_DEF( FT_Bool ) - ftc_cmap_node_compare( FTC_CMapNode cnode, - FTC_CMapQuery cquery ) - { - FT_UInt32 offset = (FT_UInt32)( cquery->char_code - cnode->first ); - - - return FT_BOOL( offset < FTC_CMAP_INDICES_MAX ); - } - - - /*************************************************************************/ - /*************************************************************************/ - /***** *****/ - /***** CHARMAP FAMILY *****/ - /***** *****/ - /*************************************************************************/ - /*************************************************************************/ - - - FT_CALLBACK_DEF( FT_Error ) - ftc_cmap_family_init( FTC_CMapFamily cfam, - FTC_CMapQuery cquery, - FTC_Cache cache ) - { - FTC_Manager manager = cache->manager; - FTC_CMapDesc desc = cquery->desc; - FT_UInt32 hash = 0; - FT_Error error; - FT_Face face; - - - /* setup charmap descriptor */ - cfam->desc = *desc; - - /* let's see whether the rest is correct too */ - error = FTC_Manager_Lookup_Face( manager, desc->face_id, &face ); - if ( !error ) - { - FT_UInt count = face->num_charmaps; - FT_UInt idx = count; - FT_CharMap* cur = face->charmaps; - - - switch ( desc->type ) - { - case FTC_CMAP_BY_INDEX: - idx = desc->u.index; - hash = idx * 33; - break; - - case FTC_CMAP_BY_ENCODING: - for ( idx = 0; idx < count; idx++, cur++ ) - if ( cur[0]->encoding == desc->u.encoding ) - break; - - hash = idx * 67; - break; - - case FTC_CMAP_BY_ID: - for ( idx = 0; idx < count; idx++, cur++ ) - { - if ( (FT_UInt)cur[0]->platform_id == desc->u.id.platform && - (FT_UInt)cur[0]->encoding_id == desc->u.id.encoding ) - { - hash = ( ( desc->u.id.platform << 8 ) | desc->u.id.encoding ) * 7; - break; - } - } - break; - - default: - ; - } - - if ( idx >= count ) - goto Bad_Descriptor; - - /* compute hash value, both in family and query */ - cfam->index = idx; - cfam->hash = hash ^ FTC_FACE_ID_HASH( desc->face_id ); - FTC_QUERY( cquery )->hash = FTC_CMAP_HASH( cfam, cquery ); - - error = ftc_family_init( FTC_FAMILY( cfam ), - FTC_QUERY( cquery ), cache ); - } - - return error; - - Bad_Descriptor: - FT_ERROR(( "ftp_cmap_family_init: invalid charmap descriptor\n" )); - return FTC_Err_Invalid_Argument; - } - - - FT_CALLBACK_DEF( FT_Bool ) - ftc_cmap_family_compare( FTC_CMapFamily cfam, - FTC_CMapQuery cquery ) - { - FT_Int result = 0; - - - /* first, compare face id and type */ - if ( cfam->desc.face_id != cquery->desc->face_id || - cfam->desc.type != cquery->desc->type ) - goto Exit; - - switch ( cfam->desc.type ) - { - case FTC_CMAP_BY_INDEX: - result = ( cfam->desc.u.index == cquery->desc->u.index ); - break; - - case FTC_CMAP_BY_ENCODING: - result = ( cfam->desc.u.encoding == cquery->desc->u.encoding ); - break; - - case FTC_CMAP_BY_ID: - result = ( cfam->desc.u.id.platform == cquery->desc->u.id.platform && - cfam->desc.u.id.encoding == cquery->desc->u.id.encoding ); - break; - - default: - ; - } - - if ( result ) - { - /* when found, update the 'family' and 'hash' field of the query */ - FTC_QUERY( cquery )->family = FTC_FAMILY( cfam ); - FTC_QUERY( cquery )->hash = FTC_CMAP_HASH( cfam, cquery ); - } - - Exit: - return FT_BOOL( result ); - } - - - /*************************************************************************/ - /*************************************************************************/ - /***** *****/ - /***** GLYPH IMAGE CACHE *****/ - /***** *****/ - /*************************************************************************/ - /*************************************************************************/ - - - FT_CALLBACK_TABLE_DEF - const FTC_Cache_ClassRec ftc_cmap_cache_class = - { - sizeof ( FTC_CacheRec ), - (FTC_Cache_InitFunc) ftc_cache_init, - (FTC_Cache_ClearFunc)ftc_cache_clear, - (FTC_Cache_DoneFunc) ftc_cache_done, - - sizeof ( FTC_CMapFamilyRec ), - (FTC_Family_InitFunc) ftc_cmap_family_init, - (FTC_Family_CompareFunc)ftc_cmap_family_compare, - (FTC_Family_DoneFunc) ftc_family_done, - - sizeof ( FTC_CMapNodeRec ), - (FTC_Node_InitFunc) ftc_cmap_node_init, - (FTC_Node_WeightFunc) ftc_cmap_node_weight, - (FTC_Node_CompareFunc)ftc_cmap_node_compare, - (FTC_Node_DoneFunc) ftc_node_done - }; - - - /* documentation is in ftccmap.h */ - - FT_EXPORT_DEF( FT_Error ) - FTC_CMapCache_New( FTC_Manager manager, - FTC_CMapCache *acache ) - { - return FTC_Manager_Register_Cache( - manager, - (FTC_Cache_Class)&ftc_cmap_cache_class, - FTC_CACHE_P( acache ) ); - } - - -#ifdef FTC_CACHE_USE_INLINE - -#define GEN_CACHE_FAMILY_COMPARE( f, q, c ) \ - ftc_cmap_family_compare( (FTC_CMapFamily)(f), (FTC_CMapQuery)(q) ) - -#define GEN_CACHE_NODE_COMPARE( n, q, c ) \ - ftc_cmap_node_compare( (FTC_CMapNode)(n), (FTC_CMapQuery)(q) ) - -#define GEN_CACHE_LOOKUP ftc_cmap_cache_lookup - -#include "ftccache.i" - -#else /* !FTC_CACHE_USE_INLINE */ - -#define ftc_cmap_cache_lookup ftc_cache_lookup - -#endif /* !FTC_CACHE_USE_INLINE */ - - - /* documentation is in ftccmap.h */ - - FT_EXPORT_DEF( FT_UInt ) - FTC_CMapCache_Lookup( FTC_CMapCache cache, - FTC_CMapDesc desc, - FT_UInt32 char_code ) - { - FTC_CMapQueryRec cquery; - FTC_CMapNode node; - FT_Error error; - FT_UInt gindex = 0; - - - if ( !cache || !desc ) - { - FT_ERROR(( "FTC_CMapCache_Lookup: bad arguments, returning 0!\n" )); - return 0; - } - - cquery.desc = desc; - cquery.char_code = char_code; - - error = ftc_cmap_cache_lookup( FTC_CACHE( cache ), - FTC_QUERY( &cquery ), - (FTC_Node*)&node ); - if ( !error ) - { - FT_UInt offset = (FT_UInt)( char_code - node->first ); - - - FT_ASSERT( offset < FTC_CMAP_INDICES_MAX ); - - gindex = node->indices[offset]; - if ( gindex == FTC_CMAP_UNKNOWN ) - { - FT_Face face; - - - /* we need to use FT_Get_Char_Index */ - gindex = 0; - - error = FTC_Manager_Lookup_Face( FTC_CACHE(cache)->manager, - desc->face_id, - &face ); - if ( !error ) - { - FT_CharMap old, cmap = NULL; - FT_UInt cmap_index; - - - /* save old charmap, select new one */ - old = face->charmap; - cmap_index = FTC_CMAP_FAMILY( FTC_QUERY( &cquery )->family )->index; - cmap = face->charmaps[cmap_index]; - - FT_Set_Charmap( face, cmap ); - - /* perform lookup */ - gindex = FT_Get_Char_Index( face, char_code ); - node->indices[offset] = (FT_UInt16)gindex; - - /* restore old charmap */ - FT_Set_Charmap( face, old ); - } - } - } - - return gindex; - } - - -/* END */ |