| /***************************************************************************/ |
| /* */ |
| /* psmodule.c */ |
| /* */ |
| /* PSNames module implementation (body). */ |
| /* */ |
| /* Copyright 1996-2001, 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_INTERNAL_POSTSCRIPT_NAMES_H |
| #include FT_INTERNAL_OBJECTS_H |
| |
| #include "psmodule.h" |
| #include "pstables.h" |
| |
| #include "psnamerr.h" |
| |
| |
| #ifndef FT_CONFIG_OPTION_NO_POSTSCRIPT_NAMES |
| |
| |
| #ifdef FT_CONFIG_OPTION_ADOBE_GLYPH_LIST |
| |
| |
| /* return the Unicode value corresponding to a given glyph. Note that */ |
| /* we do deal with glyph variants by detecting a non-initial dot in */ |
| /* the name, as in `A.swash' or `e.final', etc. */ |
| /* */ |
| static FT_UInt32 |
| ps_unicode_value( const char* glyph_name ) |
| { |
| FT_Int n; |
| char first = glyph_name[0]; |
| char temp[64]; |
| |
| |
| /* if the name begins with `uni', then the glyph name may be a */ |
| /* hard-coded unicode character code. */ |
| if ( glyph_name[0] == 'u' && |
| glyph_name[1] == 'n' && |
| glyph_name[2] == 'i' ) |
| { |
| /* determine whether the next four characters following are */ |
| /* hexadecimal. */ |
| |
| /* XXX: Add code to deal with ligatures, i.e. glyph names like */ |
| /* `uniXXXXYYYYZZZZ'... */ |
| |
| FT_Int count; |
| FT_ULong value = 0; |
| const char* p = glyph_name + 3; |
| |
| |
| for ( count = 4; count > 0; count--, p++ ) |
| { |
| char c = *p; |
| unsigned int d; |
| |
| |
| d = (unsigned char)c - '0'; |
| if ( d >= 10 ) |
| { |
| d = (unsigned char)c - 'A'; |
| if ( d >= 6 ) |
| d = 16; |
| else |
| d += 10; |
| } |
| |
| /* exit if a non-uppercase hexadecimal character was found */ |
| if ( d >= 16 ) |
| break; |
| |
| value = ( value << 4 ) + d; |
| } |
| if ( count == 0 ) |
| return value; |
| } |
| |
| /* look for a non-initial dot in the glyph name in order to */ |
| /* sort-out variants like `A.swash', `e.final', etc. */ |
| { |
| const char* p; |
| int len; |
| |
| |
| p = glyph_name; |
| |
| while ( *p && *p != '.' ) |
| p++; |
| |
| len = (int)( p - glyph_name ); |
| |
| if ( *p && len < 64 ) |
| { |
| ft_strncpy( temp, glyph_name, len ); |
| temp[len] = 0; |
| glyph_name = temp; |
| } |
| } |
| |
| /* now, look up the glyph in the Adobe Glyph List */ |
| for ( n = 0; n < NUM_ADOBE_GLYPHS; n++ ) |
| { |
| const char* name = sid_standard_names[n]; |
| |
| |
| if ( first == name[0] && ft_strcmp( glyph_name, name ) == 0 ) |
| return ps_names_to_unicode[n]; |
| } |
| |
| /* not found, there is probably no Unicode value for this glyph name */ |
| return 0; |
| } |
| |
| |
| /* ft_qsort callback to sort the unicode map */ |
| FT_CALLBACK_DEF( int ) |
| compare_uni_maps( const void* a, |
| const void* b ) |
| { |
| PS_UniMap* map1 = (PS_UniMap*)a; |
| PS_UniMap* map2 = (PS_UniMap*)b; |
| |
| |
| return ( map1->unicode - map2->unicode ); |
| } |
| |
| |
| /* Builds a table that maps Unicode values to glyph indices */ |
| static FT_Error |
| ps_build_unicode_table( FT_Memory memory, |
| FT_UInt num_glyphs, |
| const char** glyph_names, |
| PS_Unicodes* table ) |
| { |
| FT_Error error; |
| |
| |
| /* we first allocate the table */ |
| table->num_maps = 0; |
| table->maps = 0; |
| |
| if ( !FT_NEW_ARRAY( table->maps, num_glyphs ) ) |
| { |
| FT_UInt n; |
| FT_UInt count; |
| PS_UniMap* map; |
| FT_UInt32 uni_char; |
| |
| |
| map = table->maps; |
| |
| for ( n = 0; n < num_glyphs; n++ ) |
| { |
| const char* gname = glyph_names[n]; |
| |
| |
| if ( gname ) |
| { |
| uni_char = ps_unicode_value( gname ); |
| |
| if ( uni_char != 0 && uni_char != 0xFFFF ) |
| { |
| map->unicode = uni_char; |
| map->glyph_index = n; |
| map++; |
| } |
| } |
| } |
| |
| /* now, compress the table a bit */ |
| count = (FT_UInt)( map - table->maps ); |
| |
| if ( count > 0 && FT_REALLOC( table->maps, |
| num_glyphs * sizeof ( PS_UniMap ), |
| count * sizeof ( PS_UniMap ) ) ) |
| count = 0; |
| |
| if ( count == 0 ) |
| { |
| FT_FREE( table->maps ); |
| if ( !error ) |
| error = PSnames_Err_Invalid_Argument; /* no unicode chars here! */ |
| } |
| else |
| /* sort the table in increasing order of unicode values */ |
| ft_qsort( table->maps, count, sizeof ( PS_UniMap ), compare_uni_maps ); |
| |
| table->num_maps = count; |
| } |
| |
| return error; |
| } |
| |
| |
| static FT_UInt |
| ps_lookup_unicode( PS_Unicodes* table, |
| FT_ULong unicode ) |
| { |
| PS_UniMap *min, *max, *mid; |
| |
| |
| /* perform a binary search on the table */ |
| |
| min = table->maps; |
| max = min + table->num_maps - 1; |
| |
| while ( min <= max ) |
| { |
| mid = min + ( max - min ) / 2; |
| if ( mid->unicode == unicode ) |
| return mid->glyph_index; |
| |
| if ( min == max ) |
| break; |
| |
| if ( mid->unicode < unicode ) |
| min = mid + 1; |
| else |
| max = mid - 1; |
| } |
| |
| return 0xFFFF; |
| } |
| |
| |
| static FT_ULong |
| ps_next_unicode( PS_Unicodes* table, |
| FT_ULong unicode ) |
| { |
| PS_UniMap *min, *max, *mid; |
| |
| |
| unicode++; |
| /* perform a binary search on the table */ |
| |
| min = table->maps; |
| max = min + table->num_maps - 1; |
| |
| while ( min <= max ) |
| { |
| mid = min + ( max - min ) / 2; |
| if ( mid->unicode == unicode ) |
| return unicode; |
| |
| if ( min == max ) |
| break; |
| |
| if ( mid->unicode < unicode ) |
| min = mid + 1; |
| else |
| max = mid - 1; |
| } |
| |
| if ( max < table->maps ) |
| max = table->maps; |
| |
| while ( max < table->maps + table->num_maps ) |
| { |
| if ( unicode < max->unicode ) |
| return max->unicode; |
| max++; |
| } |
| |
| return 0; |
| } |
| |
| |
| #endif /* FT_CONFIG_OPTION_ADOBE_GLYPH_LIST */ |
| |
| |
| static const char* |
| ps_get_macintosh_name( FT_UInt name_index ) |
| { |
| if ( name_index >= 258 ) |
| name_index = 0; |
| |
| return ps_glyph_names[mac_standard_names[name_index]]; |
| } |
| |
| |
| static const char* |
| ps_get_standard_strings( FT_UInt sid ) |
| { |
| return ( sid < NUM_SID_GLYPHS ? sid_standard_names[sid] : 0 ); |
| } |
| |
| |
| static |
| const PSNames_Interface psnames_interface = |
| { |
| #ifdef FT_CONFIG_OPTION_ADOBE_GLYPH_LIST |
| |
| (PS_Unicode_Value_Func) ps_unicode_value, |
| (PS_Build_Unicodes_Func) ps_build_unicode_table, |
| (PS_Lookup_Unicode_Func) ps_lookup_unicode, |
| |
| #else |
| |
| 0, |
| 0, |
| 0, |
| |
| #endif /* FT_CONFIG_OPTION_ADOBE_GLYPH_LIST */ |
| |
| (PS_Macintosh_Name_Func) ps_get_macintosh_name, |
| (PS_Adobe_Std_Strings_Func) ps_get_standard_strings, |
| |
| t1_standard_encoding, |
| t1_expert_encoding, |
| |
| #ifdef FT_CONFIG_OPTION_ADOBE_GLYPH_LIST |
| (PS_Next_Unicode_Func) ps_next_unicode |
| #else |
| 0 |
| #endif /* FT_CONFIG_OPTION_ADOBE_GLYPH_LIST */ |
| |
| }; |
| |
| |
| #endif /* !FT_CONFIG_OPTION_NO_POSTSCRIPT_NAMES */ |
| |
| |
| FT_CALLBACK_TABLE_DEF |
| const FT_Module_Class psnames_module_class = |
| { |
| 0, /* this is not a font driver, nor a renderer */ |
| sizeof ( FT_ModuleRec ), |
| |
| "psnames", /* driver name */ |
| 0x10000L, /* driver version */ |
| 0x20000L, /* driver requires FreeType 2 or above */ |
| |
| #ifdef FT_CONFIG_OPTION_NO_POSTSCRIPT_NAMES |
| 0, |
| #else |
| (void*)&psnames_interface, /* module specific interface */ |
| #endif |
| |
| (FT_Module_Constructor)0, |
| (FT_Module_Destructor) 0, |
| (FT_Module_Requester) 0 |
| }; |
| |
| |
| /* END */ |
