ref: d0ab3a0dd8f6355b3603d0fb04043a9ae867639b
dir: /libfreetype/psmodule.c/
/***************************************************************************/ /* */ /* 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 */