1 /***************************************************************************/
5 /* Load the basic TrueType tables, i.e., tables that can be either in */
6 /* TTF or OTF fonts (body). */
8 /* Copyright 1996-2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, */
10 /* David Turner, Robert Wilhelm, and Werner Lemberg. */
12 /* This file is part of the FreeType project, and may only be used, */
13 /* modified, and distributed under the terms of the FreeType project */
14 /* license, LICENSE.TXT. By continuing to use, modify, or distribute */
15 /* this file you indicate that you have read the license and */
16 /* understand and accept it fully. */
18 /***************************************************************************/
22 #include FT_INTERNAL_DEBUG_H
23 #include FT_INTERNAL_STREAM_H
24 #include FT_TRUETYPE_TAGS_H
30 /*************************************************************************/
32 /* The macro FT_COMPONENT is used in trace mode. It is an implicit */
33 /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
34 /* messages during execution. */
37 #define FT_COMPONENT trace_ttload
40 /*************************************************************************/
43 /* tt_face_lookup_table */
46 /* Looks for a TrueType table by name. */
49 /* face :: A face object handle. */
51 /* tag :: The searched tag. */
54 /* A pointer to the table directory entry. 0 if not found. */
56 FT_LOCAL_DEF( TT_Table )
57 tt_face_lookup_table( TT_Face face,
62 #ifdef FT_DEBUG_LEVEL_TRACE
63 FT_Bool zero_length = FALSE;
67 FT_TRACE4(( "tt_face_lookup_table: %08p, `%c%c%c%c' -- ",
69 (FT_Char)( tag >> 24 ),
70 (FT_Char)( tag >> 16 ),
71 (FT_Char)( tag >> 8 ),
74 entry = face->dir_tables;
75 limit = entry + face->num_tables;
77 for ( ; entry < limit; entry++ )
79 /* For compatibility with Windows, we consider */
80 /* zero-length tables the same as missing tables. */
81 if ( entry->Tag == tag )
83 if ( entry->Length != 0 )
85 FT_TRACE4(( "found table.\n" ));
88 #ifdef FT_DEBUG_LEVEL_TRACE
94 #ifdef FT_DEBUG_LEVEL_TRACE
96 FT_TRACE4(( "ignoring empty table\n" ));
98 FT_TRACE4(( "could not find table\n" ));
105 /*************************************************************************/
108 /* tt_face_goto_table */
111 /* Looks for a TrueType table by name, then seek a stream to it. */
114 /* face :: A face object handle. */
116 /* tag :: The searched tag. */
118 /* stream :: The stream to seek when the table is found. */
121 /* length :: The length of the table if found, undefined otherwise. */
124 /* FreeType error code. 0 means success. */
126 FT_LOCAL_DEF( FT_Error )
127 tt_face_goto_table( TT_Face face,
136 table = tt_face_lookup_table( face, tag );
140 *length = table->Length;
142 if ( FT_STREAM_SEEK( table->Offset ) )
146 error = SFNT_Err_Table_Missing;
155 /* - check that `num_tables' is valid (and adjust it if necessary) */
157 /* - look for a `head' table, check its size, and parse it to check */
158 /* whether its `magic' field is correctly set */
160 /* - errors (except errors returned by stream handling) */
162 /* SFNT_Err_Unknown_File_Format: */
163 /* no table is defined in directory, it is not sfnt-wrapped */
165 /* SFNT_Err_Table_Missing: */
166 /* table directory is valid, but essential tables */
167 /* (head/bhed/SING) are missing */
170 check_table_dir( SFNT_Header sfnt,
174 FT_UShort nn, valid_entries = 0;
175 FT_UInt has_head = 0, has_sing = 0, has_meta = 0;
176 FT_ULong offset = sfnt->offset + 12;
178 static const FT_Frame_Field table_dir_entry_fields[] =
181 #define FT_STRUCTURE TT_TableRec
183 FT_FRAME_START( 16 ),
184 FT_FRAME_ULONG( Tag ),
185 FT_FRAME_ULONG( CheckSum ),
186 FT_FRAME_ULONG( Offset ),
187 FT_FRAME_ULONG( Length ),
192 if ( FT_STREAM_SEEK( offset ) )
195 for ( nn = 0; nn < sfnt->num_tables; nn++ )
200 if ( FT_STREAM_READ_FIELDS( table_dir_entry_fields, &table ) )
203 FT_TRACE2(( "check_table_dir:"
204 " can read only %d table%s in font (instead of %d)\n",
205 nn, nn == 1 ? "" : "s", sfnt->num_tables ));
206 sfnt->num_tables = nn;
210 /* we ignore invalid tables */
211 if ( table.Offset + table.Length > stream->size )
213 FT_TRACE2(( "check_table_dir: table entry %d invalid\n", nn ));
219 if ( table.Tag == TTAG_head || table.Tag == TTAG_bhed )
224 #ifndef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
225 if ( table.Tag == TTAG_head )
230 * The table length should be 0x36, but certain font tools make it
231 * 0x38, so we will just check that it is greater.
233 * Note that according to the specification, the table must be
234 * padded to 32-bit lengths, but this doesn't apply to the value of
235 * its `Length' field!
238 if ( table.Length < 0x36 )
240 FT_TRACE2(( "check_table_dir: `head' table too small\n" ));
241 error = SFNT_Err_Table_Missing;
245 if ( FT_STREAM_SEEK( table.Offset + 12 ) ||
246 FT_READ_ULONG( magic ) )
249 if ( magic != 0x5F0F3CF5UL )
251 FT_TRACE2(( "check_table_dir:"
252 " no magic number found in `head' table\n"));
253 error = SFNT_Err_Table_Missing;
257 if ( FT_STREAM_SEEK( offset + ( nn + 1 ) * 16 ) )
260 else if ( table.Tag == TTAG_SING )
262 else if ( table.Tag == TTAG_META )
266 sfnt->num_tables = valid_entries;
268 if ( sfnt->num_tables == 0 )
270 FT_TRACE2(( "check_table_dir: no tables found\n" ));
271 error = SFNT_Err_Unknown_File_Format;
275 /* if `sing' and `meta' tables are present, there is no `head' table */
276 if ( has_head || ( has_sing && has_meta ) )
283 FT_TRACE2(( "check_table_dir:" ));
284 #ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
285 FT_TRACE2(( " neither `head', `bhed', nor `sing' table found\n" ));
287 FT_TRACE2(( " neither `head' nor `sing' table found\n" ));
289 error = SFNT_Err_Table_Missing;
297 /*************************************************************************/
300 /* tt_face_load_font_dir */
303 /* Loads the header of a SFNT font file. */
306 /* face :: A handle to the target face object. */
308 /* stream :: The input stream. */
311 /* sfnt :: The SFNT header. */
314 /* FreeType error code. 0 means success. */
317 /* The stream cursor must be at the beginning of the font directory. */
319 FT_LOCAL_DEF( FT_Error )
320 tt_face_load_font_dir( TT_Face face,
325 FT_Memory memory = stream->memory;
329 static const FT_Frame_Field offset_table_fields[] =
332 #define FT_STRUCTURE SFNT_HeaderRec
335 FT_FRAME_USHORT( num_tables ),
336 FT_FRAME_USHORT( search_range ),
337 FT_FRAME_USHORT( entry_selector ),
338 FT_FRAME_USHORT( range_shift ),
343 FT_TRACE2(( "tt_face_load_font_dir: %08p\n", face ));
345 /* read the offset table */
347 sfnt.offset = FT_STREAM_POS();
349 if ( FT_READ_ULONG( sfnt.format_tag ) ||
350 FT_STREAM_READ_FIELDS( offset_table_fields, &sfnt ) )
353 /* many fonts don't have these fields set correctly */
355 if ( sfnt.search_range != 1 << ( sfnt.entry_selector + 4 ) ||
356 sfnt.search_range + sfnt.range_shift != sfnt.num_tables << 4 )
357 return SFNT_Err_Unknown_File_Format;
360 /* load the table directory */
362 FT_TRACE2(( "-- Number of tables: %10u\n", sfnt.num_tables ));
363 FT_TRACE2(( "-- Format version: 0x%08lx\n", sfnt.format_tag ));
366 error = check_table_dir( &sfnt, stream );
369 FT_TRACE2(( "tt_face_load_font_dir:"
370 " invalid table directory for TrueType\n" ));
375 face->num_tables = sfnt.num_tables;
376 face->format_tag = sfnt.format_tag;
378 if ( FT_QNEW_ARRAY( face->dir_tables, face->num_tables ) )
381 if ( FT_STREAM_SEEK( sfnt.offset + 12 ) ||
382 FT_FRAME_ENTER( face->num_tables * 16L ) )
385 entry = face->dir_tables;
388 " tag offset length checksum\n"
389 " ----------------------------------\n" ));
391 for ( nn = 0; nn < sfnt.num_tables; nn++ )
393 entry->Tag = FT_GET_TAG4();
394 entry->CheckSum = FT_GET_ULONG();
395 entry->Offset = FT_GET_LONG();
396 entry->Length = FT_GET_LONG();
398 /* ignore invalid tables */
399 if ( entry->Offset + entry->Length > stream->size )
403 FT_TRACE2(( " %c%c%c%c %08lx %08lx %08lx\n",
404 (FT_Char)( entry->Tag >> 24 ),
405 (FT_Char)( entry->Tag >> 16 ),
406 (FT_Char)( entry->Tag >> 8 ),
407 (FT_Char)( entry->Tag ),
417 FT_TRACE2(( "table directory loaded\n\n" ));
424 /*************************************************************************/
427 /* tt_face_load_any */
430 /* Loads any font table into client memory. */
433 /* face :: The face object to look for. */
435 /* tag :: The tag of table to load. Use the value 0 if you want */
436 /* to access the whole font file, else set this parameter */
437 /* to a valid TrueType table tag that you can forge with */
438 /* the MAKE_TT_TAG macro. */
440 /* offset :: The starting offset in the table (or the file if */
443 /* length :: The address of the decision variable: */
445 /* If length == NULL: */
446 /* Loads the whole table. Returns an error if */
449 /* If *length == 0: */
450 /* Exits immediately; returning the length of the given */
451 /* table or of the font file, depending on the value of */
454 /* If *length != 0: */
455 /* Loads the next `length' bytes of table or font, */
456 /* starting at offset `offset' (in table or font too). */
459 /* buffer :: The address of target buffer. */
462 /* FreeType error code. 0 means success. */
464 FT_LOCAL_DEF( FT_Error )
465 tt_face_load_any( TT_Face face,
479 /* look for tag in font directory */
480 table = tt_face_lookup_table( face, tag );
483 error = SFNT_Err_Table_Missing;
487 offset += table->Offset;
488 size = table->Length;
491 /* tag == 0 -- the user wants to access the font file directly */
492 size = face->root.stream->size;
494 if ( length && *length == 0 )
504 stream = face->root.stream;
505 /* the `if' is syntactic sugar for picky compilers */
506 if ( FT_STREAM_READ_AT( offset, buffer, size ) )
514 /*************************************************************************/
517 /* tt_face_load_generic_header */
520 /* Loads the TrueType table `head' or `bhed'. */
523 /* face :: A handle to the target face object. */
525 /* stream :: The input stream. */
528 /* FreeType error code. 0 means success. */
531 tt_face_load_generic_header( TT_Face face,
538 static const FT_Frame_Field header_fields[] =
541 #define FT_STRUCTURE TT_Header
543 FT_FRAME_START( 54 ),
544 FT_FRAME_ULONG ( Table_Version ),
545 FT_FRAME_ULONG ( Font_Revision ),
546 FT_FRAME_LONG ( CheckSum_Adjust ),
547 FT_FRAME_LONG ( Magic_Number ),
548 FT_FRAME_USHORT( Flags ),
549 FT_FRAME_USHORT( Units_Per_EM ),
550 FT_FRAME_LONG ( Created[0] ),
551 FT_FRAME_LONG ( Created[1] ),
552 FT_FRAME_LONG ( Modified[0] ),
553 FT_FRAME_LONG ( Modified[1] ),
554 FT_FRAME_SHORT ( xMin ),
555 FT_FRAME_SHORT ( yMin ),
556 FT_FRAME_SHORT ( xMax ),
557 FT_FRAME_SHORT ( yMax ),
558 FT_FRAME_USHORT( Mac_Style ),
559 FT_FRAME_USHORT( Lowest_Rec_PPEM ),
560 FT_FRAME_SHORT ( Font_Direction ),
561 FT_FRAME_SHORT ( Index_To_Loc_Format ),
562 FT_FRAME_SHORT ( Glyph_Data_Format ),
567 error = face->goto_table( face, tag, stream, 0 );
571 header = &face->header;
573 if ( FT_STREAM_READ_FIELDS( header_fields, header ) )
576 FT_TRACE3(( "Units per EM: %4u\n", header->Units_Per_EM ));
577 FT_TRACE3(( "IndexToLoc: %4d\n", header->Index_To_Loc_Format ));
584 FT_LOCAL_DEF( FT_Error )
585 tt_face_load_head( TT_Face face,
588 return tt_face_load_generic_header( face, stream, TTAG_head );
592 #ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
594 FT_LOCAL_DEF( FT_Error )
595 tt_face_load_bhed( TT_Face face,
598 return tt_face_load_generic_header( face, stream, TTAG_bhed );
601 #endif /* TT_CONFIG_OPTION_EMBEDDED_BITMAPS */
604 /*************************************************************************/
607 /* tt_face_load_max_profile */
610 /* Loads the maximum profile into a face object. */
613 /* face :: A handle to the target face object. */
615 /* stream :: The input stream. */
618 /* FreeType error code. 0 means success. */
620 FT_LOCAL_DEF( FT_Error )
621 tt_face_load_maxp( TT_Face face,
625 TT_MaxProfile* maxProfile = &face->max_profile;
627 const FT_Frame_Field maxp_fields[] =
630 #define FT_STRUCTURE TT_MaxProfile
633 FT_FRAME_LONG ( version ),
634 FT_FRAME_USHORT( numGlyphs ),
638 const FT_Frame_Field maxp_fields_extra[] =
640 FT_FRAME_START( 26 ),
641 FT_FRAME_USHORT( maxPoints ),
642 FT_FRAME_USHORT( maxContours ),
643 FT_FRAME_USHORT( maxCompositePoints ),
644 FT_FRAME_USHORT( maxCompositeContours ),
645 FT_FRAME_USHORT( maxZones ),
646 FT_FRAME_USHORT( maxTwilightPoints ),
647 FT_FRAME_USHORT( maxStorage ),
648 FT_FRAME_USHORT( maxFunctionDefs ),
649 FT_FRAME_USHORT( maxInstructionDefs ),
650 FT_FRAME_USHORT( maxStackElements ),
651 FT_FRAME_USHORT( maxSizeOfInstructions ),
652 FT_FRAME_USHORT( maxComponentElements ),
653 FT_FRAME_USHORT( maxComponentDepth ),
658 error = face->goto_table( face, TTAG_maxp, stream, 0 );
662 if ( FT_STREAM_READ_FIELDS( maxp_fields, maxProfile ) )
665 maxProfile->maxPoints = 0;
666 maxProfile->maxContours = 0;
667 maxProfile->maxCompositePoints = 0;
668 maxProfile->maxCompositeContours = 0;
669 maxProfile->maxZones = 0;
670 maxProfile->maxTwilightPoints = 0;
671 maxProfile->maxStorage = 0;
672 maxProfile->maxFunctionDefs = 0;
673 maxProfile->maxInstructionDefs = 0;
674 maxProfile->maxStackElements = 0;
675 maxProfile->maxSizeOfInstructions = 0;
676 maxProfile->maxComponentElements = 0;
677 maxProfile->maxComponentDepth = 0;
679 if ( maxProfile->version >= 0x10000L )
681 if ( FT_STREAM_READ_FIELDS( maxp_fields_extra, maxProfile ) )
684 /* XXX: an adjustment that is necessary to load certain */
685 /* broken fonts like `Keystrokes MT' :-( */
687 /* We allocate 64 function entries by default when */
688 /* the maxFunctionDefs value is smaller. */
690 if ( maxProfile->maxFunctionDefs < 64 )
691 maxProfile->maxFunctionDefs = 64;
693 /* we add 4 phantom points later */
694 if ( maxProfile->maxTwilightPoints > ( 0xFFFFU - 4 ) )
696 FT_TRACE0(( "tt_face_load_maxp:"
697 " too much twilight points in `maxp' table;\n"
699 " some glyphs might be rendered incorrectly\n" ));
701 maxProfile->maxTwilightPoints = 0xFFFFU - 4;
704 /* we arbitrarily limit recursion to avoid stack exhaustion */
705 if ( maxProfile->maxComponentDepth > 100 )
707 FT_TRACE0(( "tt_face_load_maxp:"
708 " abnormally large component depth (%d) set to 100\n",
709 maxProfile->maxComponentDepth ));
710 maxProfile->maxComponentDepth = 100;
714 FT_TRACE3(( "numGlyphs: %u\n", maxProfile->numGlyphs ));
721 /*************************************************************************/
724 /* tt_face_load_names */
727 /* Loads the name records. */
730 /* face :: A handle to the target face object. */
732 /* stream :: The input stream. */
735 /* FreeType error code. 0 means success. */
737 FT_LOCAL_DEF( FT_Error )
738 tt_face_load_name( TT_Face face,
742 FT_Memory memory = stream->memory;
743 FT_ULong table_pos, table_len;
744 FT_ULong storage_start, storage_limit;
748 static const FT_Frame_Field name_table_fields[] =
751 #define FT_STRUCTURE TT_NameTableRec
754 FT_FRAME_USHORT( format ),
755 FT_FRAME_USHORT( numNameRecords ),
756 FT_FRAME_USHORT( storageOffset ),
760 static const FT_Frame_Field name_record_fields[] =
763 #define FT_STRUCTURE TT_NameEntryRec
765 /* no FT_FRAME_START */
766 FT_FRAME_USHORT( platformID ),
767 FT_FRAME_USHORT( encodingID ),
768 FT_FRAME_USHORT( languageID ),
769 FT_FRAME_USHORT( nameID ),
770 FT_FRAME_USHORT( stringLength ),
771 FT_FRAME_USHORT( stringOffset ),
776 table = &face->name_table;
777 table->stream = stream;
779 error = face->goto_table( face, TTAG_name, stream, &table_len );
783 table_pos = FT_STREAM_POS();
786 if ( FT_STREAM_READ_FIELDS( name_table_fields, table ) )
789 /* Some popular Asian fonts have an invalid `storageOffset' value */
790 /* (it should be at least "6 + 12*num_names"). However, the string */
791 /* offsets, computed as "storageOffset + entry->stringOffset", are */
792 /* valid pointers within the name table... */
794 /* We thus can't check `storageOffset' right now. */
796 storage_start = table_pos + 6 + 12*table->numNameRecords;
797 storage_limit = table_pos + table_len;
799 if ( storage_start > storage_limit )
801 FT_ERROR(( "tt_face_load_name: invalid `name' table\n" ));
802 error = SFNT_Err_Name_Table_Missing;
806 /* Allocate the array of name records. */
807 count = table->numNameRecords;
808 table->numNameRecords = 0;
810 if ( FT_NEW_ARRAY( table->names, count ) ||
811 FT_FRAME_ENTER( count * 12 ) )
814 /* Load the name records and determine how much storage is needed */
815 /* to hold the strings themselves. */
817 TT_NameEntryRec* entry = table->names;
820 for ( ; count > 0; count-- )
822 if ( FT_STREAM_READ_FIELDS( name_record_fields, entry ) )
825 /* check that the name is not empty */
826 if ( entry->stringLength == 0 )
829 /* check that the name string is within the table */
830 entry->stringOffset += table_pos + table->storageOffset;
831 if ( entry->stringOffset < storage_start ||
832 entry->stringOffset + entry->stringLength > storage_limit )
834 /* invalid entry - ignore it */
835 entry->stringOffset = 0;
836 entry->stringLength = 0;
843 table->numNameRecords = (FT_UInt)( entry - table->names );
848 /* everything went well, update face->num_names */
849 face->num_names = (FT_UShort) table->numNameRecords;
856 /*************************************************************************/
859 /* tt_face_free_names */
862 /* Frees the name records. */
865 /* face :: A handle to the target face object. */
868 tt_face_free_name( TT_Face face )
870 FT_Memory memory = face->root.driver->root.memory;
871 TT_NameTable table = &face->name_table;
872 TT_NameEntry entry = table->names;
873 FT_UInt count = table->numNameRecords;
878 for ( ; count > 0; count--, entry++ )
880 FT_FREE( entry->string );
881 entry->stringLength = 0;
884 /* free strings table */
885 FT_FREE( table->names );
888 table->numNameRecords = 0;
890 table->storageOffset = 0;
894 /*************************************************************************/
897 /* tt_face_load_cmap */
900 /* Loads the cmap directory in a face object. The cmaps themselves */
901 /* are loaded on demand in the `ttcmap.c' module. */
904 /* face :: A handle to the target face object. */
906 /* stream :: A handle to the input stream. */
909 /* FreeType error code. 0 means success. */
912 FT_LOCAL_DEF( FT_Error )
913 tt_face_load_cmap( TT_Face face,
919 error = face->goto_table( face, TTAG_cmap, stream, &face->cmap_size );
923 if ( FT_FRAME_EXTRACT( face->cmap_size, face->cmap_table ) )
932 /*************************************************************************/
935 /* tt_face_load_os2 */
938 /* Loads the OS2 table. */
941 /* face :: A handle to the target face object. */
943 /* stream :: A handle to the input stream. */
946 /* FreeType error code. 0 means success. */
948 FT_LOCAL_DEF( FT_Error )
949 tt_face_load_os2( TT_Face face,
955 const FT_Frame_Field os2_fields[] =
958 #define FT_STRUCTURE TT_OS2
960 FT_FRAME_START( 78 ),
961 FT_FRAME_USHORT( version ),
962 FT_FRAME_SHORT ( xAvgCharWidth ),
963 FT_FRAME_USHORT( usWeightClass ),
964 FT_FRAME_USHORT( usWidthClass ),
965 FT_FRAME_SHORT ( fsType ),
966 FT_FRAME_SHORT ( ySubscriptXSize ),
967 FT_FRAME_SHORT ( ySubscriptYSize ),
968 FT_FRAME_SHORT ( ySubscriptXOffset ),
969 FT_FRAME_SHORT ( ySubscriptYOffset ),
970 FT_FRAME_SHORT ( ySuperscriptXSize ),
971 FT_FRAME_SHORT ( ySuperscriptYSize ),
972 FT_FRAME_SHORT ( ySuperscriptXOffset ),
973 FT_FRAME_SHORT ( ySuperscriptYOffset ),
974 FT_FRAME_SHORT ( yStrikeoutSize ),
975 FT_FRAME_SHORT ( yStrikeoutPosition ),
976 FT_FRAME_SHORT ( sFamilyClass ),
977 FT_FRAME_BYTE ( panose[0] ),
978 FT_FRAME_BYTE ( panose[1] ),
979 FT_FRAME_BYTE ( panose[2] ),
980 FT_FRAME_BYTE ( panose[3] ),
981 FT_FRAME_BYTE ( panose[4] ),
982 FT_FRAME_BYTE ( panose[5] ),
983 FT_FRAME_BYTE ( panose[6] ),
984 FT_FRAME_BYTE ( panose[7] ),
985 FT_FRAME_BYTE ( panose[8] ),
986 FT_FRAME_BYTE ( panose[9] ),
987 FT_FRAME_ULONG ( ulUnicodeRange1 ),
988 FT_FRAME_ULONG ( ulUnicodeRange2 ),
989 FT_FRAME_ULONG ( ulUnicodeRange3 ),
990 FT_FRAME_ULONG ( ulUnicodeRange4 ),
991 FT_FRAME_BYTE ( achVendID[0] ),
992 FT_FRAME_BYTE ( achVendID[1] ),
993 FT_FRAME_BYTE ( achVendID[2] ),
994 FT_FRAME_BYTE ( achVendID[3] ),
996 FT_FRAME_USHORT( fsSelection ),
997 FT_FRAME_USHORT( usFirstCharIndex ),
998 FT_FRAME_USHORT( usLastCharIndex ),
999 FT_FRAME_SHORT ( sTypoAscender ),
1000 FT_FRAME_SHORT ( sTypoDescender ),
1001 FT_FRAME_SHORT ( sTypoLineGap ),
1002 FT_FRAME_USHORT( usWinAscent ),
1003 FT_FRAME_USHORT( usWinDescent ),
1007 const FT_Frame_Field os2_fields_extra[] =
1009 FT_FRAME_START( 8 ),
1010 FT_FRAME_ULONG( ulCodePageRange1 ),
1011 FT_FRAME_ULONG( ulCodePageRange2 ),
1015 const FT_Frame_Field os2_fields_extra2[] =
1017 FT_FRAME_START( 10 ),
1018 FT_FRAME_SHORT ( sxHeight ),
1019 FT_FRAME_SHORT ( sCapHeight ),
1020 FT_FRAME_USHORT( usDefaultChar ),
1021 FT_FRAME_USHORT( usBreakChar ),
1022 FT_FRAME_USHORT( usMaxContext ),
1027 /* We now support old Mac fonts where the OS/2 table doesn't */
1028 /* exist. Simply put, we set the `version' field to 0xFFFF */
1029 /* and test this value each time we need to access the table. */
1030 error = face->goto_table( face, TTAG_OS2, stream, 0 );
1036 if ( FT_STREAM_READ_FIELDS( os2_fields, os2 ) )
1039 os2->ulCodePageRange1 = 0;
1040 os2->ulCodePageRange2 = 0;
1042 os2->sCapHeight = 0;
1043 os2->usDefaultChar = 0;
1044 os2->usBreakChar = 0;
1045 os2->usMaxContext = 0;
1047 if ( os2->version >= 0x0001 )
1049 /* only version 1 tables */
1050 if ( FT_STREAM_READ_FIELDS( os2_fields_extra, os2 ) )
1053 if ( os2->version >= 0x0002 )
1055 /* only version 2 tables */
1056 if ( FT_STREAM_READ_FIELDS( os2_fields_extra2, os2 ) )
1061 FT_TRACE3(( "sTypoAscender: %4d\n", os2->sTypoAscender ));
1062 FT_TRACE3(( "sTypoDescender: %4d\n", os2->sTypoDescender ));
1063 FT_TRACE3(( "usWinAscent: %4u\n", os2->usWinAscent ));
1064 FT_TRACE3(( "usWinDescent: %4u\n", os2->usWinDescent ));
1065 FT_TRACE3(( "fsSelection: 0x%2x\n", os2->fsSelection ));
1072 /*************************************************************************/
1075 /* tt_face_load_postscript */
1078 /* Loads the Postscript table. */
1081 /* face :: A handle to the target face object. */
1083 /* stream :: A handle to the input stream. */
1086 /* FreeType error code. 0 means success. */
1088 FT_LOCAL_DEF( FT_Error )
1089 tt_face_load_post( TT_Face face,
1093 TT_Postscript* post = &face->postscript;
1095 static const FT_Frame_Field post_fields[] =
1098 #define FT_STRUCTURE TT_Postscript
1100 FT_FRAME_START( 32 ),
1101 FT_FRAME_ULONG( FormatType ),
1102 FT_FRAME_ULONG( italicAngle ),
1103 FT_FRAME_SHORT( underlinePosition ),
1104 FT_FRAME_SHORT( underlineThickness ),
1105 FT_FRAME_ULONG( isFixedPitch ),
1106 FT_FRAME_ULONG( minMemType42 ),
1107 FT_FRAME_ULONG( maxMemType42 ),
1108 FT_FRAME_ULONG( minMemType1 ),
1109 FT_FRAME_ULONG( maxMemType1 ),
1114 error = face->goto_table( face, TTAG_post, stream, 0 );
1118 if ( FT_STREAM_READ_FIELDS( post_fields, post ) )
1121 /* we don't load the glyph names, we do that in another */
1122 /* module (ttpost). */
1124 FT_TRACE3(( "FormatType: 0x%x\n", post->FormatType ));
1125 FT_TRACE3(( "isFixedPitch: %s\n", post->isFixedPitch
1126 ? " yes" : " no" ));
1132 /*************************************************************************/
1135 /* tt_face_load_pclt */
1138 /* Loads the PCL 5 Table. */
1141 /* face :: A handle to the target face object. */
1143 /* stream :: A handle to the input stream. */
1146 /* FreeType error code. 0 means success. */
1148 FT_LOCAL_DEF( FT_Error )
1149 tt_face_load_pclt( TT_Face face,
1152 static const FT_Frame_Field pclt_fields[] =
1155 #define FT_STRUCTURE TT_PCLT
1157 FT_FRAME_START( 54 ),
1158 FT_FRAME_ULONG ( Version ),
1159 FT_FRAME_ULONG ( FontNumber ),
1160 FT_FRAME_USHORT( Pitch ),
1161 FT_FRAME_USHORT( xHeight ),
1162 FT_FRAME_USHORT( Style ),
1163 FT_FRAME_USHORT( TypeFamily ),
1164 FT_FRAME_USHORT( CapHeight ),
1165 FT_FRAME_BYTES ( TypeFace, 16 ),
1166 FT_FRAME_BYTES ( CharacterComplement, 8 ),
1167 FT_FRAME_BYTES ( FileName, 6 ),
1168 FT_FRAME_CHAR ( StrokeWeight ),
1169 FT_FRAME_CHAR ( WidthType ),
1170 FT_FRAME_BYTE ( SerifStyle ),
1171 FT_FRAME_BYTE ( Reserved ),
1176 TT_PCLT* pclt = &face->pclt;
1179 /* optional table */
1180 error = face->goto_table( face, TTAG_PCLT, stream, 0 );
1184 if ( FT_STREAM_READ_FIELDS( pclt_fields, pclt ) )
1192 /*************************************************************************/
1195 /* tt_face_load_gasp */
1198 /* Loads the `gasp' table into a face object. */
1201 /* face :: A handle to the target face object. */
1203 /* stream :: The input stream. */
1206 /* FreeType error code. 0 means success. */
1208 FT_LOCAL_DEF( FT_Error )
1209 tt_face_load_gasp( TT_Face face,
1213 FT_Memory memory = stream->memory;
1215 FT_UInt j,num_ranges;
1216 TT_GaspRange gaspranges = NULL;
1219 /* the gasp table is optional */
1220 error = face->goto_table( face, TTAG_gasp, stream, 0 );
1224 if ( FT_FRAME_ENTER( 4L ) )
1227 face->gasp.version = FT_GET_USHORT();
1228 face->gasp.numRanges = FT_GET_USHORT();
1232 /* only support versions 0 and 1 of the table */
1233 if ( face->gasp.version >= 2 )
1235 face->gasp.numRanges = 0;
1236 error = SFNT_Err_Invalid_Table;
1240 num_ranges = face->gasp.numRanges;
1241 FT_TRACE3(( "numRanges: %u\n", num_ranges ));
1243 if ( FT_QNEW_ARRAY( gaspranges, num_ranges ) ||
1244 FT_FRAME_ENTER( num_ranges * 4L ) )
1247 face->gasp.gaspRanges = gaspranges;
1249 for ( j = 0; j < num_ranges; j++ )
1251 gaspranges[j].maxPPEM = FT_GET_USHORT();
1252 gaspranges[j].gaspFlag = FT_GET_USHORT();
1254 FT_TRACE3(( "gaspRange %d: rangeMaxPPEM %5d, rangeGaspBehavior 0x%x\n",
1256 gaspranges[j].maxPPEM,
1257 gaspranges[j].gaspFlag ));