| /**************************************************************************** |
| * |
| * psmodule.c |
| * |
| * psnames module implementation (body). |
| * |
| * Copyright (C) 1996-2020 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 <freetype/internal/ftdebug.h> |
| #include <freetype/internal/ftobjs.h> |
| #include <freetype/internal/services/svpscmap.h> |
| |
| #include "psmodule.h" |
| |
| /* |
| * The file `pstables.h' with its arrays and its function |
| * `ft_get_adobe_glyph_index' is useful for other projects also (for |
| * example, `pdfium' is using it). However, if used as a C++ header, |
| * including it in two different source files makes it necessary to use |
| * `extern const' for the declaration of its arrays, otherwise the data |
| * would be duplicated as mandated by the C++ standard. |
| * |
| * For this reason, we use `DEFINE_PS_TABLES' to guard the function |
| * definitions, and `DEFINE_PS_TABLES_DATA' to provide both proper array |
| * declarations and definitions. |
| */ |
| #include "pstables.h" |
| #define DEFINE_PS_TABLES |
| #define DEFINE_PS_TABLES_DATA |
| #include "pstables.h" |
| |
| #include "psnamerr.h" |
| |
| |
| #ifdef FT_CONFIG_OPTION_POSTSCRIPT_NAMES |
| |
| |
| #ifdef FT_CONFIG_OPTION_ADOBE_GLYPH_LIST |
| |
| |
| #define VARIANT_BIT 0x80000000UL |
| #define BASE_GLYPH( code ) ( (FT_UInt32)( (code) & ~VARIANT_BIT ) ) |
| |
| |
| /* 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'; in this case, the */ |
| /* VARIANT_BIT is set in the return value. */ |
| /* */ |
| static FT_UInt32 |
| ps_unicode_value( const char* glyph_name ) |
| { |
| /* 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_UInt32 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 */ |
| /* -- this also catches character codes below `0' since such */ |
| /* negative numbers cast to `unsigned int' are far too big. */ |
| if ( d >= 16 ) |
| break; |
| |
| value = ( value << 4 ) + d; |
| } |
| |
| /* there must be exactly four hex digits */ |
| if ( count == 0 ) |
| { |
| if ( *p == '\0' ) |
| return value; |
| if ( *p == '.' ) |
| return (FT_UInt32)( value | VARIANT_BIT ); |
| } |
| } |
| |
| /* If the name begins with `u', followed by four to six uppercase */ |
| /* hexadecimal digits, it is a hard-coded unicode character code. */ |
| if ( glyph_name[0] == 'u' ) |
| { |
| FT_Int count; |
| FT_UInt32 value = 0; |
| const char* p = glyph_name + 1; |
| |
| |
| for ( count = 6; 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; |
| } |
| |
| if ( d >= 16 ) |
| break; |
| |
| value = ( value << 4 ) + d; |
| } |
| |
| if ( count <= 2 ) |
| { |
| if ( *p == '\0' ) |
| return value; |
| if ( *p == '.' ) |
| return (FT_UInt32)( value | VARIANT_BIT ); |
| } |
| } |
| |
| /* Look for a non-initial dot in the glyph name in order to */ |
| /* find variants like `A.swash', `e.final', etc. */ |
| { |
| const char* p = glyph_name; |
| const char* dot = NULL; |
| |
| |
| for ( ; *p; p++ ) |
| { |
| if ( *p == '.' && p > glyph_name ) |
| { |
| dot = p; |
| break; |
| } |
| } |
| |
| /* now look up the glyph in the Adobe Glyph List */ |
| if ( !dot ) |
| return (FT_UInt32)ft_get_adobe_glyph_index( glyph_name, p ); |
| else |
| return (FT_UInt32)( ft_get_adobe_glyph_index( glyph_name, dot ) | |
| VARIANT_BIT ); |
| } |
| } |
| |
| |
| /* 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; |
| FT_UInt32 unicode1 = BASE_GLYPH( map1->unicode ); |
| FT_UInt32 unicode2 = BASE_GLYPH( map2->unicode ); |
| |
| |
| /* sort base glyphs before glyph variants */ |
| if ( unicode1 == unicode2 ) |
| { |
| if ( map1->unicode > map2->unicode ) |
| return 1; |
| else if ( map1->unicode < map2->unicode ) |
| return -1; |
| else |
| return 0; |
| } |
| else |
| { |
| if ( unicode1 > unicode2 ) |
| return 1; |
| else if ( unicode1 < unicode2 ) |
| return -1; |
| else |
| return 0; |
| } |
| } |
| |
| |
| /* support for extra glyphs not handled (well) in AGL; */ |
| /* we add extra mappings for them if necessary */ |
| |
| #define EXTRA_GLYPH_LIST_SIZE 10 |
| |
| static const FT_UInt32 ft_extra_glyph_unicodes[EXTRA_GLYPH_LIST_SIZE] = |
| { |
| /* WGL 4 */ |
| 0x0394, |
| 0x03A9, |
| 0x2215, |
| 0x00AD, |
| 0x02C9, |
| 0x03BC, |
| 0x2219, |
| 0x00A0, |
| /* Romanian */ |
| 0x021A, |
| 0x021B |
| }; |
| |
| static const char ft_extra_glyph_names[] = |
| { |
| 'D','e','l','t','a',0, |
| 'O','m','e','g','a',0, |
| 'f','r','a','c','t','i','o','n',0, |
| 'h','y','p','h','e','n',0, |
| 'm','a','c','r','o','n',0, |
| 'm','u',0, |
| 'p','e','r','i','o','d','c','e','n','t','e','r','e','d',0, |
| 's','p','a','c','e',0, |
| 'T','c','o','m','m','a','a','c','c','e','n','t',0, |
| 't','c','o','m','m','a','a','c','c','e','n','t',0 |
| }; |
| |
| static const FT_Int |
| ft_extra_glyph_name_offsets[EXTRA_GLYPH_LIST_SIZE] = |
| { |
| 0, |
| 6, |
| 12, |
| 21, |
| 28, |
| 35, |
| 38, |
| 53, |
| 59, |
| 72 |
| }; |
| |
| |
| static void |
| ps_check_extra_glyph_name( const char* gname, |
| FT_UInt glyph, |
| FT_UInt* extra_glyphs, |
| FT_UInt *states ) |
| { |
| FT_UInt n; |
| |
| |
| for ( n = 0; n < EXTRA_GLYPH_LIST_SIZE; n++ ) |
| { |
| if ( ft_strcmp( ft_extra_glyph_names + |
| ft_extra_glyph_name_offsets[n], gname ) == 0 ) |
| { |
| if ( states[n] == 0 ) |
| { |
| /* mark this extra glyph as a candidate for the cmap */ |
| states[n] = 1; |
| extra_glyphs[n] = glyph; |
| } |
| |
| return; |
| } |
| } |
| } |
| |
| |
| static void |
| ps_check_extra_glyph_unicode( FT_UInt32 uni_char, |
| FT_UInt *states ) |
| { |
| FT_UInt n; |
| |
| |
| for ( n = 0; n < EXTRA_GLYPH_LIST_SIZE; n++ ) |
| { |
| if ( uni_char == ft_extra_glyph_unicodes[n] ) |
| { |
| /* disable this extra glyph from being added to the cmap */ |
| states[n] = 2; |
| |
| return; |
| } |
| } |
| } |
| |
| |
| /* Build a table that maps Unicode values to glyph indices. */ |
| static FT_Error |
| ps_unicodes_init( FT_Memory memory, |
| PS_Unicodes table, |
| FT_UInt num_glyphs, |
| PS_GetGlyphNameFunc get_glyph_name, |
| PS_FreeGlyphNameFunc free_glyph_name, |
| FT_Pointer glyph_data ) |
| { |
| FT_Error error; |
| |
| FT_UInt extra_glyph_list_states[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; |
| FT_UInt extra_glyphs[EXTRA_GLYPH_LIST_SIZE]; |
| |
| |
| /* we first allocate the table */ |
| table->num_maps = 0; |
| table->maps = NULL; |
| |
| if ( !FT_NEW_ARRAY( table->maps, num_glyphs + EXTRA_GLYPH_LIST_SIZE ) ) |
| { |
| 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 = get_glyph_name( glyph_data, n ); |
| |
| |
| if ( gname ) |
| { |
| ps_check_extra_glyph_name( gname, n, |
| extra_glyphs, extra_glyph_list_states ); |
| uni_char = ps_unicode_value( gname ); |
| |
| if ( BASE_GLYPH( uni_char ) != 0 ) |
| { |
| ps_check_extra_glyph_unicode( uni_char, |
| extra_glyph_list_states ); |
| map->unicode = uni_char; |
| map->glyph_index = n; |
| map++; |
| } |
| |
| if ( free_glyph_name ) |
| free_glyph_name( glyph_data, gname ); |
| } |
| } |
| |
| for ( n = 0; n < EXTRA_GLYPH_LIST_SIZE; n++ ) |
| { |
| if ( extra_glyph_list_states[n] == 1 ) |
| { |
| /* This glyph name has an additional representation. */ |
| /* Add it to the cmap. */ |
| |
| map->unicode = ft_extra_glyph_unicodes[n]; |
| map->glyph_index = extra_glyphs[n]; |
| map++; |
| } |
| } |
| |
| /* now compress the table a bit */ |
| count = (FT_UInt)( map - table->maps ); |
| |
| if ( count == 0 ) |
| { |
| /* No unicode chars here! */ |
| FT_FREE( table->maps ); |
| if ( !error ) |
| error = FT_THROW( No_Unicode_Glyph_Name ); |
| } |
| else |
| { |
| /* Reallocate if the number of used entries is much smaller. */ |
| if ( count < num_glyphs / 2 ) |
| { |
| (void)FT_RENEW_ARRAY( table->maps, |
| num_glyphs + EXTRA_GLYPH_LIST_SIZE, |
| count ); |
| error = FT_Err_Ok; |
| } |
| |
| /* Sort the table in increasing order of unicode values, */ |
| /* taking care of glyph variants. */ |
| ft_qsort( table->maps, count, sizeof ( PS_UniMap ), |
| compare_uni_maps ); |
| } |
| |
| table->num_maps = count; |
| } |
| |
| return error; |
| } |
| |
| |
| static FT_UInt |
| ps_unicodes_char_index( PS_Unicodes table, |
| FT_UInt32 unicode ) |
| { |
| PS_UniMap *min, *max, *mid, *result = NULL; |
| |
| |
| /* Perform a binary search on the table. */ |
| |
| min = table->maps; |
| max = min + table->num_maps - 1; |
| |
| while ( min <= max ) |
| { |
| FT_UInt32 base_glyph; |
| |
| |
| mid = min + ( ( max - min ) >> 1 ); |
| |
| if ( mid->unicode == unicode ) |
| { |
| result = mid; |
| break; |
| } |
| |
| base_glyph = BASE_GLYPH( mid->unicode ); |
| |
| if ( base_glyph == unicode ) |
| result = mid; /* remember match but continue search for base glyph */ |
| |
| if ( min == max ) |
| break; |
| |
| if ( base_glyph < unicode ) |
| min = mid + 1; |
| else |
| max = mid - 1; |
| } |
| |
| if ( result ) |
| return result->glyph_index; |
| else |
| return 0; |
| } |
| |
| |
| static FT_UInt32 |
| ps_unicodes_char_next( PS_Unicodes table, |
| FT_UInt32 *unicode ) |
| { |
| FT_UInt result = 0; |
| FT_UInt32 char_code = *unicode + 1; |
| |
| |
| { |
| FT_UInt min = 0; |
| FT_UInt max = table->num_maps; |
| FT_UInt mid; |
| PS_UniMap* map; |
| FT_UInt32 base_glyph; |
| |
| |
| while ( min < max ) |
| { |
| mid = min + ( ( max - min ) >> 1 ); |
| map = table->maps + mid; |
| |
| if ( map->unicode == char_code ) |
| { |
| result = map->glyph_index; |
| goto Exit; |
| } |
| |
| base_glyph = BASE_GLYPH( map->unicode ); |
| |
| if ( base_glyph == char_code ) |
| result = map->glyph_index; |
| |
| if ( base_glyph < char_code ) |
| min = mid + 1; |
| else |
| max = mid; |
| } |
| |
| if ( result ) |
| goto Exit; /* we have a variant glyph */ |
| |
| /* we didn't find it; check whether we have a map just above it */ |
| char_code = 0; |
| |
| if ( min < table->num_maps ) |
| { |
| map = table->maps + min; |
| result = map->glyph_index; |
| char_code = BASE_GLYPH( map->unicode ); |
| } |
| } |
| |
| Exit: |
| *unicode = char_code; |
| return result; |
| } |
| |
| |
| #endif /* FT_CONFIG_OPTION_ADOBE_GLYPH_LIST */ |
| |
| |
| static const char* |
| ps_get_macintosh_name( FT_UInt name_index ) |
| { |
| if ( name_index >= FT_NUM_MAC_NAMES ) |
| name_index = 0; |
| |
| return ft_standard_glyph_names + ft_mac_names[name_index]; |
| } |
| |
| |
| static const char* |
| ps_get_standard_strings( FT_UInt sid ) |
| { |
| if ( sid >= FT_NUM_SID_NAMES ) |
| return 0; |
| |
| return ft_standard_glyph_names + ft_sid_names[sid]; |
| } |
| |
| |
| #ifdef FT_CONFIG_OPTION_ADOBE_GLYPH_LIST |
| |
| FT_DEFINE_SERVICE_PSCMAPSREC( |
| pscmaps_interface, |
| |
| (PS_Unicode_ValueFunc) ps_unicode_value, /* unicode_value */ |
| (PS_Unicodes_InitFunc) ps_unicodes_init, /* unicodes_init */ |
| (PS_Unicodes_CharIndexFunc)ps_unicodes_char_index, /* unicodes_char_index */ |
| (PS_Unicodes_CharNextFunc) ps_unicodes_char_next, /* unicodes_char_next */ |
| |
| (PS_Macintosh_NameFunc) ps_get_macintosh_name, /* macintosh_name */ |
| (PS_Adobe_Std_StringsFunc) ps_get_standard_strings, /* adobe_std_strings */ |
| |
| t1_standard_encoding, /* adobe_std_encoding */ |
| t1_expert_encoding /* adobe_expert_encoding */ |
| ) |
| |
| #else |
| |
| FT_DEFINE_SERVICE_PSCMAPSREC( |
| pscmaps_interface, |
| |
| NULL, /* unicode_value */ |
| NULL, /* unicodes_init */ |
| NULL, /* unicodes_char_index */ |
| NULL, /* unicodes_char_next */ |
| |
| (PS_Macintosh_NameFunc) ps_get_macintosh_name, /* macintosh_name */ |
| (PS_Adobe_Std_StringsFunc) ps_get_standard_strings, /* adobe_std_strings */ |
| |
| t1_standard_encoding, /* adobe_std_encoding */ |
| t1_expert_encoding /* adobe_expert_encoding */ |
| ) |
| |
| #endif /* FT_CONFIG_OPTION_ADOBE_GLYPH_LIST */ |
| |
| |
| FT_DEFINE_SERVICEDESCREC1( |
| pscmaps_services, |
| |
| FT_SERVICE_ID_POSTSCRIPT_CMAPS, &pscmaps_interface ) |
| |
| |
| static FT_Pointer |
| psnames_get_service( FT_Module module, |
| const char* service_id ) |
| { |
| FT_UNUSED( module ); |
| |
| return ft_service_list_lookup( pscmaps_services, service_id ); |
| } |
| |
| #endif /* FT_CONFIG_OPTION_POSTSCRIPT_NAMES */ |
| |
| |
| #ifndef FT_CONFIG_OPTION_POSTSCRIPT_NAMES |
| #define PUT_PS_NAMES_SERVICE( a ) NULL |
| #else |
| #define PUT_PS_NAMES_SERVICE( a ) a |
| #endif |
| |
| FT_DEFINE_MODULE( |
| 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 */ |
| |
| PUT_PS_NAMES_SERVICE( |
| (void*)&pscmaps_interface ), /* module specific interface */ |
| |
| (FT_Module_Constructor)NULL, /* module_init */ |
| (FT_Module_Destructor) NULL, /* module_done */ |
| (FT_Module_Requester) PUT_PS_NAMES_SERVICE( psnames_get_service ) /* get_interface */ |
| ) |
| |
| |
| /* END */ |
