?? cffdrivr.c
字號:
if ( buffer_max > 0 ) { FT_UInt len = ft_strlen( gname ); if ( len >= buffer_max ) len = buffer_max - 1; FT_MEM_COPY( buffer, gname, len ); ((FT_Byte*)buffer)[len] = 0; } FT_FREE ( gname ); error = CFF_Err_Ok; Exit: return error; } /*************************************************************************/ /* */ /* <Function> */ /* cff_get_char_index */ /* */ /* <Description> */ /* Uses a charmap to return a given character code's glyph index. */ /* */ /* <Input> */ /* charmap :: A handle to the source charmap object. */ /* charcode :: The character code. */ /* */ /* <Return> */ /* Glyph index. 0 means `undefined character code'. */ /* */ static FT_UInt cff_get_char_index( TT_CharMap charmap, FT_Long charcode ) { FT_Error error; CFF_Face face; TT_CMapTable cmap; cmap = &charmap->cmap; face = (CFF_Face)charmap->root.face; /* Load table if needed */ if ( !cmap->loaded ) { SFNT_Service sfnt = (SFNT_Service)face->sfnt; error = sfnt->load_charmap( face, cmap, face->root.stream ); if ( error ) return 0; cmap->loaded = TRUE; } return ( cmap->get_index ? cmap->get_index( cmap, charcode ) : 0 ); } /*************************************************************************/ /* */ /* <Function> */ /* cff_get_next_char */ /* */ /* <Description> */ /* Uses a charmap to return the next encoded charcode. */ /* */ /* <Input> */ /* charmap :: A handle to the source charmap object. */ /* charcode :: The character code. */ /* */ /* <Return> */ /* Char code. 0 means `no encoded chars above the given one'. */ /* */ static FT_Long cff_get_next_char( TT_CharMap charmap, FT_Long charcode ) { FT_Error error; CFF_Face face; TT_CMapTable cmap; cmap = &charmap->cmap; face = (CFF_Face)charmap->root.face; /* Load table if needed */ if ( !cmap->loaded ) { SFNT_Service sfnt = (SFNT_Service)face->sfnt; error = sfnt->load_charmap( face, cmap, face->root.stream ); if ( error ) return 0; cmap->loaded = TRUE; } return ( cmap->get_next_char ? cmap->get_next_char( cmap, charcode ) : 0 ); } /*************************************************************************/ /* */ /* <Function> */ /* cff_get_name_index */ /* */ /* <Description> */ /* Uses the psnames module and the CFF font's charset to to return a */ /* a given glyph name's glyph index. */ /* */ /* <Input> */ /* face :: A handle to the source face object. */ /* */ /* glyph_name :: The glyph name. */ /* */ /* <Return> */ /* Glyph index. 0 means `undefined character code'. */ /* */ static FT_UInt cff_get_name_index( CFF_Face face, FT_String* glyph_name ) { CFF_Font cff; CFF_Charset charset; PSNames_Service psnames; FT_Memory memory = FT_FACE_MEMORY( face ); FT_String* name; FT_UShort sid; FT_UInt i; FT_Int result; cff = (CFF_FontRec *)face->extra.data; charset = &cff->charset; psnames = (PSNames_Service)FT_Get_Module_Interface( face->root.driver->root.library, "psnames" ); for ( i = 0; i < cff->num_glyphs; i++ ) { sid = charset->sids[i]; if ( sid > 390 ) name = CFF_Get_Name( &cff->string_index, sid - 391 ); else name = (FT_String *)psnames->adobe_std_strings( sid ); result = ft_strcmp( glyph_name, name ); if ( sid > 390 ) FT_FREE( name ); if ( !result ) return i; } return 0; } /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ /**** ****/ /**** ****/ /**** D R I V E R I N T E R F A C E ****/ /**** ****/ /**** ****/ /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ static FT_Module_Interface cff_get_interface( CFF_Driver driver, const char* module_interface ) { FT_Module sfnt;#ifndef FT_CONFIG_OPTION_NO_GLYPH_NAMES if ( ft_strcmp( (const char*)module_interface, "glyph_name" ) == 0 ) return (FT_Module_Interface)cff_get_glyph_name; if ( ft_strcmp( (const char*)module_interface, "name_index" ) == 0 ) return (FT_Module_Interface)cff_get_name_index;#endif /* we simply pass our request to the `sfnt' module */ sfnt = FT_Get_Module( driver->root.root.library, "sfnt" ); return sfnt ? sfnt->clazz->get_interface( sfnt, module_interface ) : 0; } /* The FT_DriverInterface structure is defined in ftdriver.h. */ FT_CALLBACK_TABLE_DEF const FT_Driver_ClassRec cff_driver_class = { /* begin with the FT_Module_Class fields */ { ft_module_font_driver | ft_module_driver_scalable | ft_module_driver_has_hinter, sizeof( CFF_DriverRec ), "cff", 0x10000L, 0x20000L, 0, /* module-specific interface */ (FT_Module_Constructor)CFF_Driver_Init, (FT_Module_Destructor) CFF_Driver_Done, (FT_Module_Requester) cff_get_interface, }, /* now the specific driver fields */ sizeof( TT_FaceRec ), sizeof( FT_SizeRec ), sizeof( CFF_GlyphSlotRec ), (FT_Face_InitFunc) CFF_Face_Init, (FT_Face_DoneFunc) CFF_Face_Done, (FT_Size_InitFunc) CFF_Size_Init, (FT_Size_DoneFunc) CFF_Size_Done, (FT_Slot_InitFunc) CFF_GlyphSlot_Init, (FT_Slot_DoneFunc) CFF_GlyphSlot_Done, (FT_Size_ResetPointsFunc) CFF_Size_Reset, (FT_Size_ResetPixelsFunc) CFF_Size_Reset, (FT_Slot_LoadFunc) Load_Glyph, (FT_CharMap_CharIndexFunc)cff_get_char_index, (FT_Face_GetKerningFunc) Get_Kerning, (FT_Face_AttachFunc) 0, (FT_Face_GetAdvancesFunc) 0, (FT_CharMap_CharNextFunc) cff_get_next_char };/* END */?? 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