| /***************************************************************************/ |
| /* */ |
| /* ttpost.c */ |
| /* */ |
| /* Postcript name table processing for TrueType and OpenType fonts */ |
| /* (body). */ |
| /* */ |
| /* Copyright 1996-2015 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. */ |
| /* */ |
| /***************************************************************************/ |
| |
| /*************************************************************************/ |
| /* */ |
| /* The post table is not completely loaded by the core engine. This */ |
| /* file loads the missing PS glyph names and implements an API to access */ |
| /* them. */ |
| /* */ |
| /*************************************************************************/ |
| |
| |
| #include <ft2build.h> |
| #include FT_INTERNAL_DEBUG_H |
| #include FT_INTERNAL_STREAM_H |
| #include FT_TRUETYPE_TAGS_H |
| #include "ttpost.h" |
| |
| #include "sferrors.h" |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* The macro FT_COMPONENT is used in trace mode. It is an implicit */ |
| /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */ |
| /* messages during execution. */ |
| /* */ |
| #undef FT_COMPONENT |
| #define FT_COMPONENT trace_ttpost |
| |
| |
| /* If this configuration macro is defined, we rely on the `PSNames' */ |
| /* module to grab the glyph names. */ |
| |
| #ifdef FT_CONFIG_OPTION_POSTSCRIPT_NAMES |
| |
| |
| #include FT_SERVICE_POSTSCRIPT_CMAPS_H |
| |
| #define MAC_NAME( x ) (FT_String*)psnames->macintosh_name( (FT_UInt)(x) ) |
| |
| |
| #else /* FT_CONFIG_OPTION_POSTSCRIPT_NAMES */ |
| |
| |
| /* Otherwise, we ignore the `PSNames' module, and provide our own */ |
| /* table of Mac names. Thus, it is possible to build a version of */ |
| /* FreeType without the Type 1 driver & PSNames module. */ |
| |
| #define MAC_NAME( x ) (FT_String*)tt_post_default_names[x] |
| |
| /* the 258 default Mac PS glyph names; see file `tools/glnames.py' */ |
| |
| static const FT_String* const tt_post_default_names[258] = |
| { |
| /* 0 */ |
| ".notdef", ".null", "nonmarkingreturn", "space", "exclam", |
| "quotedbl", "numbersign", "dollar", "percent", "ampersand", |
| /* 10 */ |
| "quotesingle", "parenleft", "parenright", "asterisk", "plus", |
| "comma", "hyphen", "period", "slash", "zero", |
| /* 20 */ |
| "one", "two", "three", "four", "five", |
| "six", "seven", "eight", "nine", "colon", |
| /* 30 */ |
| "semicolon", "less", "equal", "greater", "question", |
| "at", "A", "B", "C", "D", |
| /* 40 */ |
| "E", "F", "G", "H", "I", |
| "J", "K", "L", "M", "N", |
| /* 50 */ |
| "O", "P", "Q", "R", "S", |
| "T", "U", "V", "W", "X", |
| /* 60 */ |
| "Y", "Z", "bracketleft", "backslash", "bracketright", |
| "asciicircum", "underscore", "grave", "a", "b", |
| /* 70 */ |
| "c", "d", "e", "f", "g", |
| "h", "i", "j", "k", "l", |
| /* 80 */ |
| "m", "n", "o", "p", "q", |
| "r", "s", "t", "u", "v", |
| /* 90 */ |
| "w", "x", "y", "z", "braceleft", |
| "bar", "braceright", "asciitilde", "Adieresis", "Aring", |
| /* 100 */ |
| "Ccedilla", "Eacute", "Ntilde", "Odieresis", "Udieresis", |
| "aacute", "agrave", "acircumflex", "adieresis", "atilde", |
| /* 110 */ |
| "aring", "ccedilla", "eacute", "egrave", "ecircumflex", |
| "edieresis", "iacute", "igrave", "icircumflex", "idieresis", |
| /* 120 */ |
| "ntilde", "oacute", "ograve", "ocircumflex", "odieresis", |
| "otilde", "uacute", "ugrave", "ucircumflex", "udieresis", |
| /* 130 */ |
| "dagger", "degree", "cent", "sterling", "section", |
| "bullet", "paragraph", "germandbls", "registered", "copyright", |
| /* 140 */ |
| "trademark", "acute", "dieresis", "notequal", "AE", |
| "Oslash", "infinity", "plusminus", "lessequal", "greaterequal", |
| /* 150 */ |
| "yen", "mu", "partialdiff", "summation", "product", |
| "pi", "integral", "ordfeminine", "ordmasculine", "Omega", |
| /* 160 */ |
| "ae", "oslash", "questiondown", "exclamdown", "logicalnot", |
| "radical", "florin", "approxequal", "Delta", "guillemotleft", |
| /* 170 */ |
| "guillemotright", "ellipsis", "nonbreakingspace", "Agrave", "Atilde", |
| "Otilde", "OE", "oe", "endash", "emdash", |
| /* 180 */ |
| "quotedblleft", "quotedblright", "quoteleft", "quoteright", "divide", |
| "lozenge", "ydieresis", "Ydieresis", "fraction", "currency", |
| /* 190 */ |
| "guilsinglleft", "guilsinglright", "fi", "fl", "daggerdbl", |
| "periodcentered", "quotesinglbase", "quotedblbase", "perthousand", "Acircumflex", |
| /* 200 */ |
| "Ecircumflex", "Aacute", "Edieresis", "Egrave", "Iacute", |
| "Icircumflex", "Idieresis", "Igrave", "Oacute", "Ocircumflex", |
| /* 210 */ |
| "apple", "Ograve", "Uacute", "Ucircumflex", "Ugrave", |
| "dotlessi", "circumflex", "tilde", "macron", "breve", |
| /* 220 */ |
| "dotaccent", "ring", "cedilla", "hungarumlaut", "ogonek", |
| "caron", "Lslash", "lslash", "Scaron", "scaron", |
| /* 230 */ |
| "Zcaron", "zcaron", "brokenbar", "Eth", "eth", |
| "Yacute", "yacute", "Thorn", "thorn", "minus", |
| /* 240 */ |
| "multiply", "onesuperior", "twosuperior", "threesuperior", "onehalf", |
| "onequarter", "threequarters", "franc", "Gbreve", "gbreve", |
| /* 250 */ |
| "Idotaccent", "Scedilla", "scedilla", "Cacute", "cacute", |
| "Ccaron", "ccaron", "dcroat", |
| }; |
| |
| |
| #endif /* FT_CONFIG_OPTION_POSTSCRIPT_NAMES */ |
| |
| |
| static FT_Error |
| load_format_20( TT_Face face, |
| FT_Stream stream, |
| FT_ULong post_limit ) |
| { |
| FT_Memory memory = stream->memory; |
| FT_Error error; |
| |
| FT_Int num_glyphs; |
| FT_UShort num_names; |
| |
| FT_UShort* glyph_indices = NULL; |
| FT_Char** name_strings = NULL; |
| |
| |
| if ( FT_READ_USHORT( num_glyphs ) ) |
| goto Exit; |
| |
| /* UNDOCUMENTED! The number of glyphs in this table can be smaller */ |
| /* than the value in the maxp table (cf. cyberbit.ttf). */ |
| |
| /* There already exist fonts which have more than 32768 glyph names */ |
| /* in this table, so the test for this threshold has been dropped. */ |
| |
| if ( num_glyphs > face->max_profile.numGlyphs ) |
| { |
| error = FT_THROW( Invalid_File_Format ); |
| goto Exit; |
| } |
| |
| /* load the indices */ |
| { |
| FT_Int n; |
| |
| |
| if ( FT_NEW_ARRAY ( glyph_indices, num_glyphs ) || |
| FT_FRAME_ENTER( num_glyphs * 2L ) ) |
| goto Fail; |
| |
| for ( n = 0; n < num_glyphs; n++ ) |
| glyph_indices[n] = FT_GET_USHORT(); |
| |
| FT_FRAME_EXIT(); |
| } |
| |
| /* compute number of names stored in table */ |
| { |
| FT_Int n; |
| |
| |
| num_names = 0; |
| |
| for ( n = 0; n < num_glyphs; n++ ) |
| { |
| FT_Int idx; |
| |
| |
| idx = glyph_indices[n]; |
| if ( idx >= 258 ) |
| { |
| idx -= 257; |
| if ( idx > num_names ) |
| num_names = (FT_UShort)idx; |
| } |
| } |
| } |
| |
| /* now load the name strings */ |
| { |
| FT_UShort n; |
| |
| |
| if ( FT_NEW_ARRAY( name_strings, num_names ) ) |
| goto Fail; |
| |
| for ( n = 0; n < num_names; n++ ) |
| { |
| FT_UInt len; |
| |
| |
| if ( FT_STREAM_POS() >= post_limit ) |
| break; |
| else |
| { |
| FT_TRACE6(( "load_format_20: %d byte left in post table\n", |
| post_limit - FT_STREAM_POS() )); |
| |
| if ( FT_READ_BYTE( len ) ) |
| goto Fail1; |
| } |
| |
| if ( len > post_limit || |
| FT_STREAM_POS() > post_limit - len ) |
| { |
| FT_Int d = (FT_Int)post_limit - (FT_Int)FT_STREAM_POS(); |
| |
| |
| FT_ERROR(( "load_format_20:" |
| " exceeding string length (%d)," |
| " truncating at end of post table (%d byte left)\n", |
| len, d )); |
| len = (FT_UInt)FT_MAX( 0, d ); |
| } |
| |
| if ( FT_NEW_ARRAY( name_strings[n], len + 1 ) || |
| FT_STREAM_READ( name_strings[n], len ) ) |
| goto Fail1; |
| |
| name_strings[n][len] = '\0'; |
| } |
| |
| if ( n < num_names ) |
| { |
| FT_ERROR(( "load_format_20:" |
| " all entries in post table are already parsed," |
| " using NULL names for gid %d - %d\n", |
| n, num_names - 1 )); |
| for ( ; n < num_names; n++ ) |
| if ( FT_NEW_ARRAY( name_strings[n], 1 ) ) |
| goto Fail1; |
| else |
| name_strings[n][0] = '\0'; |
| } |
| } |
| |
| /* all right, set table fields and exit successfully */ |
| { |
| TT_Post_20 table = &face->postscript_names.names.format_20; |
| |
| |
| table->num_glyphs = (FT_UShort)num_glyphs; |
| table->num_names = (FT_UShort)num_names; |
| table->glyph_indices = glyph_indices; |
| table->glyph_names = name_strings; |
| } |
| return FT_Err_Ok; |
| |
| Fail1: |
| { |
| FT_UShort n; |
| |
| |
| for ( n = 0; n < num_names; n++ ) |
| FT_FREE( name_strings[n] ); |
| } |
| |
| Fail: |
| FT_FREE( name_strings ); |
| FT_FREE( glyph_indices ); |
| |
| Exit: |
| return error; |
| } |
| |
| |
| static FT_Error |
| load_format_25( TT_Face face, |
| FT_Stream stream, |
| FT_ULong post_limit ) |
| { |
| FT_Memory memory = stream->memory; |
| FT_Error error; |
| |
| FT_Int num_glyphs; |
| FT_Char* offset_table = NULL; |
| |
| FT_UNUSED( post_limit ); |
| |
| |
| /* UNDOCUMENTED! This value appears only in the Apple TT specs. */ |
| if ( FT_READ_USHORT( num_glyphs ) ) |
| goto Exit; |
| |
| /* check the number of glyphs */ |
| if ( num_glyphs > face->max_profile.numGlyphs || num_glyphs > 258 ) |
| { |
| error = FT_THROW( Invalid_File_Format ); |
| goto Exit; |
| } |
| |
| if ( FT_NEW_ARRAY( offset_table, num_glyphs ) || |
| FT_STREAM_READ( offset_table, num_glyphs ) ) |
| goto Fail; |
| |
| /* now check the offset table */ |
| { |
| FT_Int n; |
| |
| |
| for ( n = 0; n < num_glyphs; n++ ) |
| { |
| FT_Long idx = (FT_Long)n + offset_table[n]; |
| |
| |
| if ( idx < 0 || idx > num_glyphs ) |
| { |
| error = FT_THROW( Invalid_File_Format ); |
| goto Fail; |
| } |
| } |
| } |
| |
| /* OK, set table fields and exit successfully */ |
| { |
| TT_Post_25 table = &face->postscript_names.names.format_25; |
| |
| |
| table->num_glyphs = (FT_UShort)num_glyphs; |
| table->offsets = offset_table; |
| } |
| |
| return FT_Err_Ok; |
| |
| Fail: |
| FT_FREE( offset_table ); |
| |
| Exit: |
| return error; |
| } |
| |
| |
| static FT_Error |
| load_post_names( TT_Face face ) |
| { |
| FT_Stream stream; |
| FT_Error error; |
| FT_Fixed format; |
| FT_ULong post_len; |
| FT_ULong post_limit; |
| |
| |
| /* get a stream for the face's resource */ |
| stream = face->root.stream; |
| |
| /* seek to the beginning of the PS names table */ |
| error = face->goto_table( face, TTAG_post, stream, &post_len ); |
| if ( error ) |
| goto Exit; |
| |
| post_limit = FT_STREAM_POS() + post_len; |
| |
| format = face->postscript.FormatType; |
| |
| /* go to beginning of subtable */ |
| if ( FT_STREAM_SKIP( 32 ) ) |
| goto Exit; |
| |
| /* now read postscript table */ |
| if ( format == 0x00020000L ) |
| error = load_format_20( face, stream, post_limit ); |
| else if ( format == 0x00028000L ) |
| error = load_format_25( face, stream, post_limit ); |
| else |
| error = FT_THROW( Invalid_File_Format ); |
| |
| face->postscript_names.loaded = 1; |
| |
| Exit: |
| return error; |
| } |
| |
| |
| FT_LOCAL_DEF( void ) |
| tt_face_free_ps_names( TT_Face face ) |
| { |
| FT_Memory memory = face->root.memory; |
| TT_Post_Names names = &face->postscript_names; |
| FT_Fixed format; |
| |
| |
| if ( names->loaded ) |
| { |
| format = face->postscript.FormatType; |
| |
| if ( format == 0x00020000L ) |
| { |
| TT_Post_20 table = &names->names.format_20; |
| FT_UShort n; |
| |
| |
| FT_FREE( table->glyph_indices ); |
| table->num_glyphs = 0; |
| |
| for ( n = 0; n < table->num_names; n++ ) |
| FT_FREE( table->glyph_names[n] ); |
| |
| FT_FREE( table->glyph_names ); |
| table->num_names = 0; |
| } |
| else if ( format == 0x00028000L ) |
| { |
| TT_Post_25 table = &names->names.format_25; |
| |
| |
| FT_FREE( table->offsets ); |
| table->num_glyphs = 0; |
| } |
| } |
| names->loaded = 0; |
| } |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* tt_face_get_ps_name */ |
| /* */ |
| /* <Description> */ |
| /* Get the PostScript glyph name of a glyph. */ |
| /* */ |
| /* <Input> */ |
| /* face :: A handle to the parent face. */ |
| /* */ |
| /* idx :: The glyph index. */ |
| /* */ |
| /* <InOut> */ |
| /* PSname :: The address of a string pointer. Will be NULL in case */ |
| /* of error, otherwise it is a pointer to the glyph name. */ |
| /* */ |
| /* You must not modify the returned string! */ |
| /* */ |
| /* <Output> */ |
| /* FreeType error code. 0 means success. */ |
| /* */ |
| FT_LOCAL_DEF( FT_Error ) |
| tt_face_get_ps_name( TT_Face face, |
| FT_UInt idx, |
| FT_String** PSname ) |
| { |
| FT_Error error; |
| TT_Post_Names names; |
| FT_Fixed format; |
| |
| #ifdef FT_CONFIG_OPTION_POSTSCRIPT_NAMES |
| FT_Service_PsCMaps psnames; |
| #endif |
| |
| |
| if ( !face ) |
| return FT_THROW( Invalid_Face_Handle ); |
| |
| if ( idx >= (FT_UInt)face->max_profile.numGlyphs ) |
| return FT_THROW( Invalid_Glyph_Index ); |
| |
| #ifdef FT_CONFIG_OPTION_POSTSCRIPT_NAMES |
| psnames = (FT_Service_PsCMaps)face->psnames; |
| if ( !psnames ) |
| return FT_THROW( Unimplemented_Feature ); |
| #endif |
| |
| names = &face->postscript_names; |
| |
| /* `.notdef' by default */ |
| *PSname = MAC_NAME( 0 ); |
| |
| format = face->postscript.FormatType; |
| |
| if ( format == 0x00010000L ) |
| { |
| if ( idx < 258 ) /* paranoid checking */ |
| *PSname = MAC_NAME( idx ); |
| } |
| else if ( format == 0x00020000L ) |
| { |
| TT_Post_20 table = &names->names.format_20; |
| |
| |
| if ( !names->loaded ) |
| { |
| error = load_post_names( face ); |
| if ( error ) |
| goto End; |
| } |
| |
| if ( idx < (FT_UInt)table->num_glyphs ) |
| { |
| FT_UShort name_index = table->glyph_indices[idx]; |
| |
| |
| if ( name_index < 258 ) |
| *PSname = MAC_NAME( name_index ); |
| else |
| *PSname = (FT_String*)table->glyph_names[name_index - 258]; |
| } |
| } |
| else if ( format == 0x00028000L ) |
| { |
| TT_Post_25 table = &names->names.format_25; |
| |
| |
| if ( !names->loaded ) |
| { |
| error = load_post_names( face ); |
| if ( error ) |
| goto End; |
| } |
| |
| if ( idx < (FT_UInt)table->num_glyphs ) /* paranoid checking */ |
| *PSname = MAC_NAME( (FT_Int)idx + table->offsets[idx] ); |
| } |
| |
| /* nothing to do for format == 0x00030000L */ |
| |
| End: |
| return FT_Err_Ok; |
| } |
| |
| |
| /* END */ |