diff options
Diffstat (limited to 'src/freetype2/cache/ftccmap.c')
| -rw-r--r-- | src/freetype2/cache/ftccmap.c | 52 |
1 files changed, 35 insertions, 17 deletions
diff --git a/src/freetype2/cache/ftccmap.c b/src/freetype2/cache/ftccmap.c index aa59307..a802b05 100644 --- a/src/freetype2/cache/ftccmap.c +++ b/src/freetype2/cache/ftccmap.c @@ -4,7 +4,7 @@ /* */ /* FreeType CharMap cache (body) */ /* */ -/* Copyright 2000-2001, 2002, 2003, 2004, 2005, 2006, 2007 by */ +/* Copyright 2000-2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 by */ /* David Turner, Robert Wilhelm, and Werner Lemberg. */ /* */ /* This file is part of the FreeType project, and may only be used, */ @@ -22,7 +22,6 @@ #include "ftcmanag.h" #include FT_INTERNAL_MEMORY_H #include FT_INTERNAL_DEBUG_H -#include FT_TRUETYPE_IDS_H #include "ftccback.h" #include "ftcerror.h" @@ -86,9 +85,9 @@ #define FTC_CMAP_INDICES_MAX 128 /* compute a query/node hash */ -#define FTC_CMAP_HASH( faceid, index, charcode ) \ - ( FTC_FACE_ID_HASH( faceid ) + 211 * ( index ) + \ - ( (char_code) / FTC_CMAP_INDICES_MAX ) ) +#define FTC_CMAP_HASH( faceid, index, charcode ) \ + ( FTC_FACE_ID_HASH( faceid ) + 211 * (index) + \ + ( (charcode) / FTC_CMAP_INDICES_MAX ) ) /* the charmap query */ typedef struct FTC_CMapQueryRec_ @@ -175,7 +174,7 @@ /* compute the weight of a given cmap node */ - FT_CALLBACK_DEF( FT_ULong ) + FT_CALLBACK_DEF( FT_Offset ) ftc_cmap_node_weight( FTC_Node cnode, FTC_Cache cache ) { @@ -284,15 +283,27 @@ { FTC_Cache cache = FTC_CACHE( cmap_cache ); FTC_CMapQueryRec query; - FTC_CMapNode node; + FTC_Node node; FT_Error error; FT_UInt gindex = 0; FT_UInt32 hash; + FT_Int no_cmap_change = 0; + if ( cmap_index < 0 ) + { + /* Treat a negative cmap index as a special value, meaning that you */ + /* don't want to change the FT_Face's character map through this */ + /* call. This can be useful if the face requester callback already */ + /* sets the face's charmap to the appropriate value. */ + + no_cmap_change = 1; + cmap_index = 0; + } + if ( !cache ) { - FT_ERROR(( "FTC_CMapCache_Lookup: bad arguments, returning 0!\n" )); + FT_TRACE0(( "FTC_CMapCache_Lookup: bad arguments, returning 0\n" )); return 0; } @@ -311,7 +322,7 @@ * Adobe Acrobat Reader Pack, named `KozMinProVI-Regular.otf', * which contains more than 5 charmaps. */ - if ( cmap_index >= 16 ) + if ( cmap_index >= 16 && !no_cmap_change ) { FTC_OldCMapDesc desc = (FTC_OldCMapDesc) face_id; @@ -362,18 +373,21 @@ FTC_CACHE_LOOKUP_CMP( cache, ftc_cmap_node_compare, hash, &query, node, error ); #else - error = FTC_Cache_Lookup( cache, hash, &query, (FTC_Node*) &node ); + error = FTC_Cache_Lookup( cache, hash, &query, &node ); #endif if ( error ) goto Exit; - FT_ASSERT( (FT_UInt)( char_code - node->first ) < FTC_CMAP_INDICES_MAX ); + FT_ASSERT( (FT_UInt)( char_code - FTC_CMAP_NODE( node )->first ) < + FTC_CMAP_INDICES_MAX ); /* something rotten can happen with rogue clients */ - if ( (FT_UInt)( char_code - node->first >= FTC_CMAP_INDICES_MAX ) ) + if ( (FT_UInt)( char_code - FTC_CMAP_NODE( node )->first >= + FTC_CMAP_INDICES_MAX ) ) return 0; - gindex = node->indices[char_code - node->first]; + gindex = FTC_CMAP_NODE( node )->indices[char_code - + FTC_CMAP_NODE( node )->first]; if ( gindex == FTC_CMAP_UNKNOWN ) { FT_Face face; @@ -381,7 +395,9 @@ gindex = 0; - error = FTC_Manager_LookupFace( cache->manager, node->face_id, &face ); + error = FTC_Manager_LookupFace( cache->manager, + FTC_CMAP_NODE( node )->face_id, + &face ); if ( error ) goto Exit; @@ -393,16 +409,18 @@ old = face->charmap; cmap = face->charmaps[cmap_index]; - if ( old != cmap ) + if ( old != cmap && !no_cmap_change ) FT_Set_Charmap( face, cmap ); gindex = FT_Get_Char_Index( face, char_code ); - if ( old != cmap ) + if ( old != cmap && !no_cmap_change ) FT_Set_Charmap( face, old ); } - node->indices[char_code - node->first] = (FT_UShort)gindex; + FTC_CMAP_NODE( node )->indices[char_code - + FTC_CMAP_NODE( node )->first] + = (FT_UShort)gindex; } Exit: |